Cleaning of internal or external surfaces of heat-exchange or heat-transfer conduits, e.g. water tubes of boilers (F28G)

F28G              Cleaning of internal or external surfaces of heat-exchange or heat-transfer conduits, e.g. water tubes of boilers (cleaning pipes or tubes in general b08b0009020000; devices or arrangements for removing water, minerals, or sludge from boilers while the boiler is in operation, or which remain in position while the boiler is in operation, or are specifically adapted to boilers without any other utility f22b0037480000; removal or treatment of combustion products or combustion residues f23j; removing ice from heat-exchange apparatus f28f0017000000)(947)

Working vehicle (versions) // 2641324
FIELD: heating system.SUBSTANCE: working vehicle has a base, a support hinged to the base for rotation relative to the base about the first rotation axis between the first reference position and the second reference position, and a heat exchanger. The heat exchanger is hinged to the support for rotation relative to the support about the second rotation axis between the first position of the heat exchanger and the second position of the heat exchanger.EFFECT: increased efficiency of the heat exchanger.20 cl, 15 dwg
ethod for cleaning internal surface of boiler // 2640134
FIELD: chemistry.SUBSTANCE: invention can be used in the operational cleaning of the internal surfaces of small and medium-pressure water boilers and steam boilers not exceeding 15 atm from the deposits, including high-temperature silicates, calcium, and magnesium phosphates, and insoluble or hardly soluble in mineral acids. Water prepared is used as a cleaning solution after Na-cationization with a total alkalinity of 4-6 mg*ekv/dm3, and a total hardness of 0.002 mg*EQ/dm3 at a temperature of 60-90°C with pH of 7.0 and 8.5, with the addition of a complexing agent - "Trilon B" - disodium salt of ethylenediaminetetraacetic acid and phosphate, the concentration of which in the boiler water is raised to 50-168 mg/dm3 of disodium salt of ethylenediaminetetraacetic acid, and 10-20 mg/dm3 of PO43, respectively. The dosage of "Trilon B" and phosphate is carried out by two independent pumps into the suction header of the boiler feed pump. Boiler purge is carried out according to the constant analytical control, maintains the level of hardness and salt content of the boiler water in accordance with the technical requirements of the boiler.EFFECT: improving the environmental characteristics of the cleaning process by eliminating the formation of aggressive wastewater, cleaning during the operation of the equipment.3 cl, 1 tbl
Solution for deleting deposits of different nature // 2639433
FIELD: chemistry.SUBSTANCE: solution for purifying the surface from the deposits of different nature, containing hydrogen peroxide, chelating agent, water-soluble calixarene and water in the following ratio, wt %: hydrogen peroxide 2-90, chelating agent 3-30, water-soluble calixarene 0.01-10, water - the rest, wherein it contains the chelating agent in the form of polybasic organic acids, their sodium salts or derivatives of phosphorous acids. Also, a concentrated component for preparing the said solution, a method for preparing a solution, and methods for purifying the surface from deposits of different nature are proposed.EFFECT: increasing the degree of purification from sediments of different nature with a simultaneous decrease in the aggressiveness of the solution to structural materials.19 cl, 2 tbl
Cooling tower fan // 2636594
FIELD: power industry.SUBSTANCE: cooling tower fan includes a diffuser, body of which is made as a convergent-divergent shell from the glass material, on the outer surface of the body there are made intersecting stiffening ribs, and a bladed wheel is installed in the diffuser, which shaft is connected to the blade wheel rotary drive and disposed coaxially with the convergent-divergent shell, intersecting stiffening ribs are made hollow with a trapezoidal cross section and are arranged vertically and horizontally to form the cells between them, the convergent-divergent shell is formed as a body of revolution. The generatrices surfaces of the convergent-divergent shell parts are formed by the circle arc, gradually coupled with the cylindrical part generatrix, located between the generatrices of the convergent-divergent parts. The radius of the circle arc R1 of the shell convergent part is from 0.32 to 0.40 of the shell height H1, the radius of the circular arc R2 of the shell divergent part is from 0.45 to 0.50 of the shell height H1, the height H2 of the cylindrical part is from 0.35 to 0.40 of the shell height H1, the height H3 of the convergent part is from 0.32 to 0.35 of the shell height H1, the height H4 of the divergent part is from 0.25 to 0.35 of H1 the shell height, and the bladed wheel is located coaxially to the cylindrical part of the diffuser at the distance S from the diffuser shell inlet section of 0.45 to 0.5 from the shell height H1, wherein the convergent-divergent shell is mounted on the support ring, fixed on the metal frame, made in the form of a regular polygon, and the blade wheel drive is mounted on the fixed, relatively, to the metal frame beams intersecting along the shell axis, wherein the drive motor is mounted on the one of the beams end, and the reducing gear, coupled with the input shaft to the motor shaft, mounted in the place of the beams intersection at the reducing gear output shaft, coaxial with the axis of the shell, the cooling tower fan impeller is installed.EFFECT: aerodynamic drag reduction of the cooling tower fan diffuser flowing part, while maintaining the required stiffness of the diffusor structure.5 dwg
Steel products gas vapour cleaning method // 2625608
FIELD: metallurgy.SUBSTANCE: while carrying out the method, the pipes are blown with water vapour, wherein the carboxylic acid water solution is introduced. Then, after cleaning with the carboxylic acid vapour solution, the ethanol water solution is introduced into the water vapor, decomposing as a result of vapour conversion with the hydrogen generation. It is preferable to use formic acid at the preliminary cleaning step. In case of steel products manufacturing from the austenitic grade steels, it is not necessary to passivate its surfaces.EFFECT: method provides the safe and efficient cleaning of steel products and prevents the risk of steel products corrosion cracking under stress, which is made of austenitic steels.4 cl

Heat-exchanging panel // 2624094
FIELD: heating system.SUBSTANCE: heat-exchanging panel, containing the sequentially installed vertical sections, fastened together by nipples, to form the top and the bottom collecting chambers, in the cavity of the last of which there is longitudinally disposed horizontal rod with the plates made as scrapers from the elastic material fixed on it in each section of the zone, the lower edge of each of which has the shape, replicating the profile, forming the bottom of the collecting chamber in the area of the scraper and the second end of the horizontal rod is withdrawn outside the sections, besides the rod is made hollow, the internal cavity of which communicates with the outlet pipe and with each section of the collecting chamber.EFFECT: coolant circulation overlapping in the outermost sections is eliminated, the coolant simultaneous passing through all sections of the heat-exchanging panel.2 cl, 3 dwg
Composition for cleaning of heat transfer system with aluminum components // 2621696
FIELD: chemistry.SUBSTANCE: cleaner concentrate is described for a vehicle heat transfer system comprising an aluminum component, manufactured by brazing in a protective atmosphere containing more than 15 wt % of freezing temperature reduction means, 8 to 35 wt % of oxalic acid and an azole compound wherein the wt % is based on the total weight of the cleaner concentrate.EFFECT: concentrate is a homogeneous solution.17 cl, 6 tbl, 32 ex

Cleaning method of convection heating surfaces of steam boilers // 2621452
FIELD: heating.SUBSTANCE: cleaning method of convection heating surfaces of the steam boilers, in which the steam is generated in the boiler, the fuel and air is supplied into the boiler burner, which is preheated in the air preheater. The blowdown water is used as the blowing agent for cleaning the heating surfaces, which is drawn from the boiler drum and sent into the blower unit.EFFECT: increase of efficiency and reliability of the boiler plant by replacing valuable coolant - steam, compressed air, cold or hot water by less valuable and non-corrosive coolant - blowdown water.1 dwg

Cleaning method of economizer surfaces of steam boilers // 2621441
FIELD: heating.SUBSTANCE: proposed cleaning method of economizer surfaces of steam boilers, in which the feed water is supplied to the boiler drum, which is preheated in the economizer. The blowdown water is used as the washing agent for cleaning the economizer heating surfaces, which is drawn from the boiler drum and sent into the washing unit.EFFECT: increased of the efficiency and reliability of the boiler plant by replacing valuable coolant - the external source water under the pressure by less valuable non-corrosive coolant.1 dwg

ethod of cleaning of steam boiler air-heaters // 2620140
FIELD: heating, ventilation.SUBSTANCE: invention refers to the boiler equipment and may be used in boiler units of thermal power stations and heat supply systems. The method includes cleaning of air-heaters by means of impact on sediments with water sprays. Whereupon, bleed water exported from a steam boiler drum and injected into an exit flue before an air-heater is used as a cleaning medium of an air-heater.EFFECT: peculiarity of the invention is the increasing of economic efficiency and reliability of a boiler unit.1 dwg

ethod for hydrodynamic cleaning of plate exchangers and plate exchanger for method implementation // 2619326
FIELD: power industry.SUBSTANCE: method for hydrodynamic cleaning of plate heat exchangers, made in the form of sections consisting of two connected plates with spherical recesses on their working surfaces, recesses of one plate enter the notches of the other plate, including the creation of a turbulized flow with individual self-organizing pulsating vortex structures under the action of the heat carrier main flow in the recesses, as well as of an additional jet bypass flow formed due to the bypass of a part of the main flow through bypass channels made in the meridian plane of recesses, from the increased pressure zones on the walls of the recesses adjacent to their outlet edges to the reduced pressure zones in the bottom of adjacent recesses.EFFECT: as a result of complex hydrodynamic effect of single self-organizing pulsating vortex structures and jet bypass flow, continuous cleaning of the heat exchanger plate is performed, and its service life is increased, geometric parameters of tear-off holes on the plates, location and size of bypass channels are determined.8 cl, 4 dwg

ethod of heat-power equipment cleaning from deposits and scale and device for its implementation // 2619010
FIELD: power industry.SUBSTANCE: in contrast to the prototype, in the method consisting in pumping the cleaning solution through pipelines and internal cavities, before cleaning the system is emptied from working fluids, two washing solutions are prepared - alkaline, containing SAA, and acidic, solutions are heated up to 320…360K, are pumped alternately, starting with the alkaline solution, through the pipelines and internal cavities of the equipment. The solutions pumping alternates with the pumping of a neutral liquid, for example, water. The device includes pipelines, taps or valves, containers, pumps and is additionally equipped with two containers for cleaning solutions and a container with a neutral liquid, as well as a generator of pressure pulsation and speed.EFFECT: improved cleaning quality.19 cl, 1 dwg

Device for preventing deposit formation in heat exchanger // 2612540
FIELD: heating.SUBSTANCE: device for preventing deposit formation in a heat exchanger comprises a device receiving signals from a temperature sensor mounted on the outlet pipe line of the heat exchanger second stage, a control device which determines operation of a mechanical oscillation unit and a unit that impacts on the heat-carrying medium. Unit that impacts on the heat-carrying medium is mounted on the outlet pipe line of the heat exchanger first stage comprises a housing with a passage opening for the heat-carrying medium passage. Sleeve of insulating material is rigidly connected to the housing. Two solenoid windings are fixed on the sleeve. Each winding is equipped with a current sensor. There is a hollow rod inside the insulating sleeve. Rod consists of two parts: a ferromagnetic and a diamagnetic. Rod has ability to move horizontally under the impact of electromagnetic winding fields inside the sleeve in opposite directions so that the diamagnetic rod part opened or overlapped the through opening of the housing.EFFECT: reduction of generated capacity and reduction of windings heating.2 dwg

Device for mechanochemical cleaning of pipeline inner space // 2603155
FIELD: oil and gas industry.SUBSTANCE: invention relates to transportation and storage of oil products, in particular, to cleaning of inner cavities of main oil pipelines and oil product pipelines from deposits and residues of transported product prior to changing type of transported product. Device of mechanochemical cleaning of pipeline inner space comprises a section for mechanochemical cleaning, a section for storing deposit solvent and a storage section. Section for mechanochemical cleaning includes drive, lining and cleaning discs, located behind control unit, unit for transmitting location and disc rotation drive, mechanochemical activation chamber formed by alternating drive, lining, cleaning discs and rotating discs with spring-loaded polymer wear-resistant brush, and comprising a pressure line for deposit solvent, provided with injection nozzles, drainage chamber for mechanochemical activation and a heating coil for deposit solvent. Behind mechanochemical activation chamber there are, located in housing, high-pressure pump, connected with pressure line of solvent and solvent intake line, leading to feed line of high-pressure pump, and a sludge pump connected with sludge pressure line and intake line of dissolved deposits. Deposit solvent storage section includes a tank with clean solvent, equipped with flexible intake line of clean solvent, connected to feed line of high-pressure pump.EFFECT: invention provides high degree of cleaning pipeline inner surface of pipeline from sediments and residues of transported product.1 cl, 3 dwg
ethod of preoperation physical-mechanical and steam cleaning and passivation of inner surface of boiler tubes from sediments // 2599772
FIELD: heat-and-power engineering.SUBSTANCE: invention relates to heat engineering and can be used for preoperation cleaning the inner surface of boiler tubes of thermal power plants (TPP) from deposits and for subsequent passivation of this surface. Method of preoperational cleaning the inner surface of boiler tubes from sediments involves blowing the tubes with superheated steam with dosaged delivery of a complexing agent in it. Contrast: as the complexing agent a complex polyamine compound (CPC) is used.EFFECT: achieved technical result of the invention is creation of a single serial technology of preoperation cleaning and passivation of inner surfaces of boiler tubes from atmospheric corrosion products providing higher efficiency of the process with reduction of corrosion losses to the rated value.1 cl

ethod for cleaning inner surface of process equipment and pipelines (versions) // 2594426
FIELD: treatment plants.SUBSTANCE: invention relates to cleaning mechanical impurities and corrosion protection of inner surfaces of process equipment and pipelines, particularly at low temperatures, and can be used at industrial enterprises at start-up operations, scheduled repairs, at reconstruction and new construction. Method involves hydrodynamic removing deposits mode by means of jet cleaning device, flushing fluid supply to cleaning device under high pressure, generating jet exposure by forming jet flows of said fluid on surface to be cleaned, carry-over of flushing fluid flow with remote deposits at the forward direction of movement of the cleaning device on the surface to be cleaned and at the reverse direction of movement by means of reciprocal action mechanism. At the stage of deposits purification cleaning of surface from corrosion products tightly coupled with metal and scales with provision of corrosion protection of the surface to be cleaned is performed. Solution at a given components ratio is used as flushing fluid.EFFECT: technical result is high efficiency of cleaning process equipment and pipelines of various configuration with simultaneous antirust treatment at negative temperatures.14 cl, 3 dwg, 5 ex

ethod of dissolving scale-corrosion deposits // 2592952
FIELD: chemistry. SUBSTANCE: invention relates to chemical cleaning of inner cavities of heat exchange equipment and can be used for cleaning of internal combustion engines cooling systems or other units from scale-corrosion deposits. Method includes washing treated cavity with flushing solution reagent at its temperature of 50-80 °C and periodic change of flow direction through cavity, wherein solution is used containing following component ratio, wt%: sulphamic acid is 2-5, EBC is 1-1.5, corrosion inhibitor is 0.1-0.2, water is balance. Then, flushing reagent solution neutralisation is conducted with alkaline solution and an anti-corrosion treatment by flushing with passivating solution. EFFECT: method enables to avoid use of reagents, having negative impact on environment. 1 cl, 1 tbl

ethod of completing chemical cleaning of electric power plant // 2568033
FIELD: chemistry.SUBSTANCE: in the disclosed method, a cleaning solution is fed into the part to be cleaned and then discharged; during or immediately after discharging the cleaning solution into the cleaned part, steam is fed in at least a high point of said part for washing; one outlet at a lower point of the cleaned part is opened or left open; steam is fed until it comes out of the outlet; in case of multiple outlets, the outlets through which steam comes out are closed, and steam is fed until it comes out of all outlets, after which the steam feeding pipe is closed and all outlets are reopened. The invention also relates to use of the method in a steam power plant, a gas-turbine installation and particularly the water-steam loop of a waste heat steam generator.EFFECT: reduced amount of waste water.9 cl, 3 dwg
ethod of organising of complex technology of cleaning, passivation and maintenance of water chemistry conditions of working water steam path of power unit // 2568011
FIELD: power industry.SUBSTANCE: invention can be used for cleaning, passivation and maintaining of the water chemistry conditions (WCC) of the working water steam path (WWSP) of steam-power generating units, subcritical parameters, including that of combined-cycle units. The method of organising of the complex technology of cleaning and passivation of internal surfaces, and also subsequent maintaining of the correcting operational WWSP WCC of the steam-power generating unit is offered which uses the techniques effecting the chemistry conditions of the water steam medium in each of three stages of the named complex technology. The method is differed by that the techniques effecting the chemistry conditions of the water steam medium in all three stages of the named complex technology use the same amine-containing chemical reagent the optimum concentration of which in the medium treated by it is selected individually for each of the named stages, and optimum parameters of the named medium are selected only for the two first stages.EFFECT: method improvement.3 cl
ethod for chemical treatment and deactivation of pressured water-cooled research and power reactor circuits // 2558732
FIELD: chemistry.SUBSTANCE: circuit assembly is treated with 5÷20% oxyethylidenediphosphonic acid solutions neutralised to pH=2.0÷2.9 with ammonia, or potassium or sodium alkali at temperatures 55÷95°C; once pH reaches its permanent value (that is in line with termination of swallow iron oxide deposit dissolution), circulating concentrate of potassium or sodium alkali or ammonia is introduced into the circuit to ensured the solution pH=8.0÷8.5.EFFECT: compounds for treatment or deactivation of circuit assembly or separate units used in the given method possess high effectiveness to dissolve iron oxide deposits and fewer corrosion loss of carbon steels.6 tbl

ethod of steam and chemical cleaning and passivation of surfaces of metal pipes // 2557155
FIELD: power industry.SUBSTANCE: in the method of steam and chemical cleaning and passivation of surfaces of metal pipes which is characterized by their purging with water vapour with oxidizer and activators of cleaning process into the water vapour flow during their purging first the reagent is added which emits carbon oxide - water solution of formic acid, then hydrogen and at the end of the process oxygen is added.EFFECT: improvement of efficiency of cleaning and passivation of internal surfaces of heat exchange pipes due to performing the process in three stages at consecutive dosing in the flow of steam of reagent of the formic acid decayed with release of carbon oxide in the following sequence: formic acid, hydrogen and oxygen.

Removal of scale-corrosion // 2551723
FIELD: process engineering.SUBSTANCE: invention relates to cleaning the heat exchanger surfaces of scale and corrosion. This process involves application of ascorbic acid, complexing agent, water and, possibly, auxiliary additives to be forced or pouted via heat exchanging hardware. Cleaning composition is fed from expansion tank of cavitation-thermal generator. The latter allows a hydrodynamic heating of cleaning fluid to 70-130°C and swirling of liquid by hydrodynamic cavitation. Note here that before application of said composition heat exchange hardware is filled with water to be heated by cavitation-thermal generator to 50-70°C.EFFECT: higher power and process efficiency, decreased consumption of cleaning composition, non-polluting process.3 cl, 6 tbl, 1 ex

ethod for chemical cleaning of body cavities of water-cooled assemblies and components of water cooling system of locomotive diesel from scale and corrosion deposits // 2550416
FIELD: chemistry.SUBSTANCE: method for cleaning involves dividing a heat exchange system on the following circuits: a loop of the diesel water cooling system, a loop of air-water radiator sections of the water cooling system of the locomotive diesel and turbo compressor, a loop of air-water radiation sections of the water cooling system of oil and charging air, a turbo compressor loop, a charging air coolant loop, an oil-water heat exchange loop, an oil heater loop, and an operator's cab heater loop. That is combined with the separate washing of each of the above loops with a washing agent at its temperature of 50-80°C with periodic change in the solution flow direction through the loop cavity, neutralisation of the agent solutions and anti-corrosion treatment. The washing solution is a solution containing, wt %: sulphamic acid - 2-5, ethylene diamine tetraacetic acid disodium salt - 1-1.5, a corrosion inhibitor - 0.1-0.2, water - the rest.EFFECT: more effective cleaning of the heat exchange systems, higher operability, improved anticorrosion properties of the treated surfaces and safety of the method.9 cl, 2 dwg, 1 tbl

Device for ultrasonic cleaning of heat-exchanging units from deposits and intensification of technological processes // 2548965
FIELD: instrument engineering.SUBSTANCE: device for ultrasonic cleaning of the heat-exchanging units from deposits comprises the power supply including a network filter, a full-wave rectifier connected to the terminals of the network filter, and a storage capacitor connected by the positive terminal to the cathodes of the diodes of the rectifier and by the negative terminal - to the anodes of the diodes of the rectifier, the power switching elements connected in a bridge circuit, at least two magnetostrictional transducers each of which comprises one excitation winding connected between the pairs of power switching elements through the switching capacitor of large capacitance, the sensor of current of power current pulses, consisting of a fixed resistor connected in parallel with a variable resistor connected at one end to the common bus and at the other end - to the common sources of power switching elements, the sensor of short circuit current, the control unit containing a setting crystal oscillator, a DC current source of magnetic biasing, the outputs of which are connected through the throttles to the excitation winding of magnetostrictional transducers, and the inputs - to the outputs of the storage capacitor. The sensor of short-circuit current comprises a non-saturable throttle connected in parallel with a diode connected at one end to the positive terminal of the storage capacitor and the other end - to the common drains of power switching elements, and a secondary measuring winding connected in parallel with the resistor connected at one end to the common bus, and the second end - to the input of the control unit.EFFECT: improved stability of operation of the device, the intensification of technological processes.3 cl, 3 dwg

ethod for chemical removal of scale and corrosive deposits from internal cavities of heat-exchange equipment // 2532867
FIELD: chemistry.SUBSTANCE: method includes washing the cavity to be treated with a solution of a washing reagent at 50-80°C and periodically changing the direction of flow through the cavity, wherein the solution used has components in the following ratio, wt %: sulphamic acid - 2-5, disodium salt of ethylendiaminetetraacetic acid - 1-1.5, corrosion inhibitor - 0.1-0.2, water - the balance. The solution of the washing reagent is then neutralised with sodium hydroxide solution, followed by anti-corrosive treatment of the cavity by washing with a passivating solution.EFFECT: high effectiveness of the action of the treating liquid on the internal surface of a cavity of heat-exchange equipment.10 cl, 1 dwg

ethod of cleaning heat exchanger from carbonate deposits // 2528776
FIELD: heating.SUBSTANCE: method of cleaning heat exchanger from carbonate deposits is provided, comprising feeding of geothermal water with a concentration of carbon dioxide above the equilibrium value, which is generated by increasing the total, respectively, and the partial pressure of carbon dioxide in the cleaned heat exchanger. The cleaned heat exchanger is connected in series to the clean the heat exchanger, and from the geothermal water before feeding to the clean heat exchanger a part of carbon dioxide is removed to the equilibrium value and fed into the geothermal water before feeding to the cleaned heat exchanger, the partial pressure of carbon dioxide in the cleaned heat exchanger is maintained at a level above the equilibrium value.EFFECT: invention enables to improve the efficiency of cleaning the heat exchanger and to avoid heat loss of geothermal water used for hot water supply.2 dwg

ethod of paraffin deposits removal from heat exchangers at oil heating unit // 2527797
FIELD: oil and gas industry.SUBSTANCE: invention is related to oil production and may be used for paraffin deposits removal from heat exchangers at oil heating unit. Method of paraffin deposits removal from heat exchangers consist in removal of heated and liquefied paraffin by hot oil flow, at that the line of reverse oil delivery is connected to heat exchangers and at pressure drop between oil pressure at the input to heat exchangers and pressure at their output from 0.9 up to 0.95 of the maximum allowable value for these heat exchangers oil delivery is switched from their input to the output thus forming the reverse oil flow mode, which is maintained till the preset pressure drop is attained at each heat exchanger at the oil heating unit, thereupon oil delivery is switched to the input of heat exchangers.EFFECT: design simplification of the oil heating unit both in operation mode and cleaning mode with permanent heated oil delivery to consumers.1 dwg

Device for descaling from cellular heat exchanger elements of air-water type // 2526140
FIELD: heating.SUBSTANCE: invention relates to a device for descaling from cells of the irrigated cellular element used in the heat exchanger of air-water type. According to the invention the device comprises at least one tool with an active edge mounted with the ability to move on the frame between two positions along the direction common to all tools mounted on the frame, at that the active edge of this tool is made on the end of the rod of the actuating cylinder, which housing is made movable with the ability to move relative to the frame along its axis, and the piston fixedly connected to the rod limits in the housing the first chamber, permanently connected to the source of the pressurised fluid medium, and the second chamber through which the rod passes communicating with the first chamber, while the rod is at least partially retracted in the housing of the actuating cylinder and is insulated from the latter, and working on the outlet when the rod is at the extreme extended position outside the housing.EFFECT: implementation of the device increases the efficiency of descaling surfaces.10 cl, 3 dwg
ethod for cleaning and passivation of inner surface of boiler tubes with successive exposure to chemical agent and water-oxygen mixture // 2525036
FIELD: chemistry.SUBSTANCE: disclosed is a method of cleaning the inner surface of boiler tubes via treatment thereof in a separate loop with a hot water-based cleaning medium with addition of a chemical agent in form of an aqueous solution of a disodium salt of ethylenediaminetetraacetic acid. Said hot medium is boiler water at temperature of 90-100°C; the aqueous solution of said chemical agent is added to said medium for 40-80 minutes until achieving concentration thereof in the boiler water of 1.0-1.2 wt % at pH=5.0-6.0. Post-treatment and passivation of the inner surface of the boiler tubes is then carried out by switching to boiler operation in starting conditions while raising pressure and temperature of the boiler water at pH=8.8-9.3 to 3.0-25.0 MPa and 150-420°C, respectively, and feeding oxygen with concentration of 1.8-2.2 g/dm3 into the boiler water for 9-12 hours and gradually removing said chemical agent from the treated loop for 40-80 minutes.EFFECT: high reliability of operation of explosion-proof devices in case of accidental explosion at a facility and reduced release of hazardous substances into the atmosphere.3 dwg, 3 tbl
ethod of maintenance cleaning and passivation of drum boiler pipe inner surface and method of maintenance cleaning and passivation of pipe inner surface of combined-cycle plant waste-heat boiler (versions) // 2525033
FIELD: power engineering.SUBSTANCE: proposed method comprises processing of pipes in isolated circuit by hot detergent water-based solution containing nitrogen-bearing chemical reagent. Said nitrogen-bearing chemical reagent represents a film-forming amine while batching of detergent solution is performed at concentration of chemical reagent in the boiler of (250÷300) mcg/dm3. Cleaning is performed in one step at boiler pressure of 1.5÷2.5 MPa and working fluid temperature not exceeding 230°C to stabilisation of iron content in boiler water. Passivation is performed at boiler pressure of 2.5÷15.5 MPa and working fluid temperature equal to saturation temperature for boiler pressure to stabilisation of iron content in boiler water not exceeding 50 mcg/dm3.EFFECT: lower costs.2 cl, 2 tbl

Hard water heater // 2523592
FIELD: heating.SUBSTANCE: invention relates to heater with heating surface oscillated by solenoid built in the heater. Said solenoid is supplied by common power supply circuit while heating surface rests on solenoid case via resilient suspensions. The latter allow said surface oscillate relative to solenoid case.EFFECT: efficient heat power transfer, supply by common electric power feed circuit without extra converters.2 dwg
Cleaning of outer surface of aluminium or aluminium alloys of air cooling hardware // 2520839
FIELD: process engineering.SUBSTANCE: invention relates to cleaning outer aluminium surfaces of air cooling hardware. Proposed method comprises processing of surface with detergent and flushing with water. Note here that cleaning is conducted in three steps. At first and third steps, surface is flushed with heated water or the mix of water with steam at jet pressure of 20-150 bar. At second step, surface is flushed with 0.25-1.5% water solution of acidic detergent heated to 20-60°C at jet pressure of 20-150 bar and duration of 10-30 minutes. Used detergent comprises the following substances at the following ratio of components in wt %: orthophosphoric acid - 20.0-25.0, nitric acid - 8.0-15.0, oxyethylidenediphosphorus acid - 2.0-4.5, non-ionic surfactant - 0.05-0.11, water making up to 100. At first and third steps, surface is flushed with water heated to 20-100°C or with mix of water with steam heated to 100-155°C.EFFECT: higher efficiency of cleaning the surfaces located between heat exchanger ribs.3 cl, 6 ex

Device for leakage check, radiator flush and determination of heat emission in vehicle radiators // 2520786
FIELD: heating.SUBSTANCE: device for leakage check, flushing and determining the heat emission of vehicle radiators relates to washing equipment and can be used to clean radiators of cooling systems for internal combustion engines. The device comprises a test chamber, tubular electric heaters, a tank, a compressor, a circulation pump, a filter and pipelines, a clamp for a radiator with a removable top allowing for the installation of radiators of different dimensions in it, a manually controlled four-position distributor, a drain tap.EFFECT: device allows for check of leakages, flushing of a radiator and determination of the heat emission factor.1 dwg

ethod of cleaning of energotechnological equipment working surfaces // 2520446
FIELD: power engineering.SUBSTANCE: invention relates to cleaning of working surfaces of electric separators, scrubbers, bins, silos, boilers, furnaces etc, and can be used for destruction and removal of solid, bonded and loose materials. Proposed method comprises delivery of explosive composed by combustible gas, for example, propane, methane, hydrogen and mixed thereof and oxidise, for example, air or oxygen to blast area, batching of explosive and remote initiation of the blast. Note here that said explosive is enclosed in plastic bag. Invention allows a maximum filling of combustion chamber, control over blast power and rules out pressure loss at explosive combustion. Besides, it allows a directed blast owing to weakened strength of the shell.EFFECT: easy delivery to blast area, friendly handling.3 cl, 3 dwg
Washing liquid for fighting sediments and prolongation of service term of heating system pipelines (versions) // 2518094
FIELD: chemistry.SUBSTANCE: claimed washing liquids for heating systems contain either solution of 1-3% citric acid, 0.03-0.05 wt % of hydrochloric acid and 0.05-0.5 wt % of chitosan, modified with isobutyric acid, containing methylpyrazole group (chitosan methyl pyrazolyl isobutyrate - CMPI), or 1-3 wt % of citric acid, 0.1-0.15 wt % of sulfuric acid and 0.05-0.05 wt % of chitosan, modified with isobutyric acid, containing methylpyrazole group (chitosan methyl pyrazolyl isobutyrate - CMPI), water - the remaining part.EFFECT: effective purification of pipelines, prolongation of service term of heating systems and protection of steel pipelines against corrosion.2 cl
ethod for steam-chemical treatment and passivation of internal surfaces of heat-exchange pipes // 2514569
FIELD: power engineering.SUBSTANCE: method is carried out with facilities of maintenance of metal temperature in heat-exchange pipes at the required level in the range of 150-550°C, and also by performance of the process into three stages as gaseous reagents are serially supplied into the gas flow in the following order: carbon dioxide, hydrogen and oxygen.EFFECT: increased efficiency of treatment and passivation of internal surfaces of heat exchange pipes, increased efficiency of treatment and passivation of internal surfaces of heat exchange pipes, reduced corrosion impact at metal of treated surfaces, possibility to perform treatment and passivation in process of operation of heat exchange devices and devices without their shutdown and cooldown, maintaining the required level of temperature of coolant at the outer side of the surface of cleaned heat exchange pipes.1 ex

Pulse cleaning device for heating surfaces of fire-tube and gas-tube boilers // 2504724
FIELD: power industry.SUBSTANCE: device includes a combustion chamber with exhaust nozzles distributed along its longitudinal axis, fuel and air supply branch pipes, a mixer connected to a mixture line, some part of which is located inside a combustion chamber and perforated in sections between exhaust nozzles, an ignition source, a control unit connected through the control line to the ignition source. The boiler gas chamber is provided with guide impact connection pipes interconnected with its volume and by means of waveguides to the exhaust nozzles and directed to dirty inner surfaces of the boiler tubes, taken through a tube sheet to the boiler gas chamber volume; in addition, the control unit is connected via control lines to an electromagnetic valve on the fuel feed connection pipe and to an electromagnetic valve on an air supply connection pipe.EFFECT: invention allows performing effective cleaning of tube bundles of heating surfaces due to rational distribution and delivery of impact waves with a system of waveguides to impact nozzles and accurate direction of impact guide nozzles to dirty heating surfaces.1 dwg

Control of cooling air flow in sootblowing device based on blowing tube temperature // 2499213
FIELD: heating.SUBSTANCE: system includes one or more sootblowing devices; with that, each of the sootblowing devices has a lance with an elongated hollow tube and at least one nozzle on the far end of the tube. Each of the sootblowing devices is capable of moving the lances to and from the boiler during introduction and removal strokes. In order to measure and control the temperature of the annular wall of the tube during operation of one or several above said sootblowing devices, a temperature measurement system is used. The control system controls a steam flow via the tube and through the nozzle during parts of cleaning and cooling strokes. In the part of cooling strokes there used is lower steam flow level in comparison to the part of cleaning strokes during parts of cooling strokes based on the wall temperature measurement using a system for temperature measurement and elimination of the wall temperature measurement beyond the limits of the specified temperature limit.EFFECT: minimisation of cleaning liquid flow rate in a sootblowing device.2 cl, 6 dwg

Device for prevention of formation of deposits in heat exchanger (versions) // 2496073
FIELD: heating.SUBSTANCE: effective operation of proposed device on heat exchangers of different purpose requires dissimilar assemblies of action on heat carrier. Device for prevention of formation of deposits in hot water supply heat exchanger additionally includes control device receiving signals from temperature sensor installed at outlet of the second stage of heat exchanger; assembly of action on heat carrier is installed on outlet pipeline of the first stage of heat exchanger; with that, its housing with solenoid winding is installed vertically, and its bar from ferromagnetic material is made in the form of hollow stock and installed with possibility of being moved till full opening or covering of hole of outlet pipeline; with that, solenoid winding is connected to control device, and assembly of supply of pulse mechanical vibrations, which interacts with housing of heat exchanger, is made in the form of piezoelectric element operating intermittently on proper resonant frequency of heat exchanger, which is connected to control device. Device for prevention of formation of deposits in heat exchanger of heating system additionally includes the control device receiving signals from temperature sensor installed at outlet of the second stage of heat exchanger, assembly of action on heat carrier consists of ball valve installed coaxially on outlet pipeline of the first stage of heat exchanger; with that, on ball axis there rigidly installed on outer side is gear wheel of drive worm-and-worm pair, which is equipped with sensor of worm-and-worm pair motor shutdown; besides, motor is connected to control device, and assembly of supply of pulse mechanical vibrations, which interacts with housing of heat exchanger, is made in the form of piezoelectric element operating intermittently on proper resonant frequency of heat exchanger, which is connected to control device.EFFECT: improving operating efficiency of device, due to supply of heat carrier to the first stage of heat exchanger by hydraulic pulses with change of rate of heat carrier from state of rest to maximum possible with synchronous intermittent supply of pulse mechanical vibrations of resonant frequency, immediately to heat exchanger steel structure.2 cl, 3 dwg
ethod of scale removal // 2495729
FIELD: process engineering.SUBSTANCE: invention relates to scale removal and can be used under household and industrial conditions, for example, for removal of scale from teakettles or from "wet" surfaces of automotive engine cylinder blocks, or the like. Acid-based detergent solutions are filled in the vessel to be cleaned and held therein for a definite time. Said vessel is prefilled with water to be boiled and cooled to ambient temperature. Then, vessel is cooled further to below minus four degrees Centigrade to generate vibration in scale area. Then, vessel with ice is heated and, again, scale is subjected to vibration to remove water along with scale particles. Cooling temperature is selected with due allowance for tank material strength. Frequency of vibration should, in the first case, equal the scale material intrinsic oscillation frequency and, in the second case, it must equal to tank material intrinsic frequency.EFFECT: higher efficiency of scale removal.

Actuator for machine element having shape of rod // 2494332
FIELD: machine building.SUBSTANCE: actuator for a blowing pipe is proposed, which has the possibility of performing in axial direction of back-and-forth movements and at the same time actuation. A longitudinally extended flexible rod element is provided, which is directed with several turns along a screw line about the machine element having the shape of a rod, which has the possibility of being operated in both directions. Angle of elevation of turns a rod element on the machine element having the shape of a rod can be changed due to possibility of variation of the distance between supply and discharge area of the rod element on the machine element having the shape of a rod.EFFECT: enhanced operating reliability.12 cl

Flushing method for condensers with short-time return water flow // 2484407
FIELD: power industry.SUBSTANCE: flushing method of condensers with short-time return water flow involves an operating condenser filled with water, a supply water conduit having a shutoff gate valve and an operating forcing pump, an outlet water conduit having a shutoff gate valve, and an upper drain water chamber having a manhole hatch. Return water flow in the condenser is formed at performance of the following operations: shutoff gate valve is closed on an outlet water conduit, and after it is closed, the forcing pump on the supply water conduit is switched off. After the pump is stopped, the manhole hatch is opened on upper drain water chamber, and after the air suction through it to the condenser is completed, the manhole hatch is closed. Then, normal operation of the condenser and power of the turbine generator are restored. Such a method can be used at reduced power of the turbine generator for operation without any condenser.EFFECT: at creation of short-time return water flow, soft and muddy deposits are washed off tubes of condensers; as a result, vacuum is improved in it and power of turbine generator increases.1 dwg

Control method of operation of cleaning devices of boiler furnace heating surfaces // 2484406
FIELD: power industry.SUBSTANCE: control method of operation of cleaning devices of the boiler furnace heating surfaces involves electromagnetic emission scanning of walls and water wall tubes of the furnace, determination of critical slagging intensity of its heating surfaces and activation and deactivation of cleaning devices. It is proposed to scan the furnace water walls through opposite lying hatches by means of electromagnetic emission with a directivity pattern in the form of a narrow beam; scanning of walls is performed by linear movement of the narrow beam, in horizontal plane and across water wall tubes; initial scanning of walls is performed prior to the beginning of the furnace operation; a variable component determined with a regular structure of the wall surface is separated from the accepted reflected electromagnetic signal and transmitted to the filter-detector that is tuned to parameters of the signal; further scanning operations of the same walls are performed during the furnace operation; those reflected signals are received and supplied to the filter-detector; slagging intensity degree of each section of the heating surface is determined as per the value of electromagnetic signal from the filter-detector outlet.EFFECT: method improves accuracy and reliability of detection of critically slagged surfaces.5 dwg

Heat exchange system // 2482412
FIELD: heating.SUBSTANCE: heat exchange system with a heat exchanger comprises inlet and outlet surfaces. To exchange heat between a transportation liquid medium and coolant flowing through the heat exchanger in the working condition, the transportation liquid medium supply is provided through a supply surface of the heat exchange system and the inlet surface to the heat exchanger, bringing in contact with the heat exchanger and again discharge via an outlet surface from the heat exchanger. According to the invention, the heat exchange system for removal of dirt comprises an automatic cleaning system.EFFECT: automatic system of heat exchanger filter treatment in process of operation, elimination of heat exchange system outage.12 cl, 6 dwg

ethod of removing mineral, biological and organic deposits and system for realising said method // 2476804
FIELD: chemistry.SUBSTANCE: cleaning method is realised using electric and structured magnetic fields, including: opposing magnetic modulated or non-modulated fields and radial electric modulated or non-modulated fields; closed magnetic fields with a periodic structure along a stream of aqueous medium; magnetic fields which cross at certain angles in the volume of an aqueous medium which is in both stationary and dynamic state, as well as formation of local zones with high concentration of impurities and colloids. This enables to measure physical and chemical properties of the aqueous medium by conducting chemical reactions therein, primarily in dissolved impurities and colloids through resonance electromagnetic-acoustic action aimed at modification of physical and chemical properties thereof, intended to stimulate self-cleaning processes of the aqueous medium. The method is realised using a medium modification system comprising: devices which generate opposing electromagnetic modulated or non-modulated fields along and opposite the flow of the medium and by electrodes lying on the axis of the tube, which generate radial electric modulated or non-modulated fields, a device which generates a closed magnetic field with a periodic structure along the stream of the medium.EFFECT: invention enables to efficiently clean a heat-exchange surface and significantly cut expenses on use and repair of equipment in which heat exchange takes place.2 cl, 6 dwg

Heat exchanger // 2476800
FIELD: power engineering.SUBSTANCE: in a heat exchanger comprising a jacket with supply and drain nozzles, with a tubular system fixed inside, with supply and drain nozzles, damping-elastic elements and an impact unit, the tubular system is made of two and more coil pipes with rectilinear initial and end sections, the impact unit is made with an outlet channel, with a yoke having a rocking axis: and inlet channels with dart valves on stems in the quantity of coil pipes, each of inlet channels is connected with the outlet channel via dart valves arranged on stems in them as capable of reciprocal movement between channels of inlet and the channel of outlet of the impact unit, and joined with arms of the yoke installed with the rocking axis in the outlet channel of the impact unit, rectilinear initial sections of coil pipes of the tubular system are connected to the supply nozzle of the tubular system via damping-elastic elements, and rectilinear end sections of the coil pipes are connected to the appropriate channels of the impact unit inlet.EFFECT: higher energy efficiency of a heat exchanger by intensification of heat transfer, reduced metal intensity and increased overhaul period of operation.1 dwg

Wave device to remove salts from surfaces of oil and gas heat exchange equipment // 2474781
FIELD: electricity.SUBSTANCE: wave device comprises a supply unit, arranged in accordance with the circuit of a full-wave rectifier, a power capacitor connected at its outlet and a separating capacitor connected in parallel with its inlet. The device also comprises a thyristor switching unit includes two thyristors, a control unit, including serially connected a step-down transformer, a pulse frequency divider, a differentiating chain, a pulse duration shaper, and also a driving oscillator, a trigger. The first and second differentiating cascades are connected to appropriate outlets of the trigger. The first and second cascades of matches are connected to outputs of the appropriate differentiating cascades. The first and second power amplifiers are connected with outlets of appropriate cascades of matches, the second inlets of which are connected with the output of the pulse duration shaper. Outlets of power amplifiers are connected with appropriate control inlets of thyristors. The device also comprises switching capacitors, several magnetostrictive converters, every of which has a laminated magnetostrictive package with two cumulative excitation windings and a steel waveguide. A magnetostrictive package is soldered to one of ends of a waveguide, and at the second end there are slants made for welding to heat exchange equipment. At the same time the power input of the first thyristor is connected with one of linings of the power capacitor, and its outlet is connected with inlets of the first excitation windings. Outlets of the first excitation windings are connected with outlets of the second excitation windings and via appropriate switching capacitors are connected to the second lining of the power capacitor and the power outlet of the second thyristor. The power outlet of the second thyristor is connected with inlets of the second excitation windings. The control unit is equipped with the second driving oscillator and a switchboard, to the inlet of which the outlets of driving oscillators are connected, and a trigger is connected to its outlet. At the same time waveguides are made as split from two parts, one of which has a flat end and a cylindrical shape at the side of this end with thread on its surface, and the second part is made in the form of an appropriate threaded matching bushing with a flat bottom. Matching bushings have different length, and between waveguide parts there is a gasket of a material with a heat expansion ratio exceeding the heat expansion ratio of a waveguide material. Slants for welding are made at the end of the threaded matching bushing.EFFECT: increased efficiency of equipment cleaning.1 dwg

Soot blowing device // 2467275
FIELD: heating.SUBSTANCE: invention refers to soot blowing device for cleaning of boilers in operation, and namely for cleaning of heat transfer devices located in boilers by means of gaseous and/or liquid cleaning medium, such as steam and/or water stream. Soot blowing device includes blowing pipe moved in axial direction, which is equipped on its working end with side outlet nozzles. In order to provide safe connection of pipeline to the blowing pipe at lower costs, supply pipeline can consist at least of two practically straight-line stiff sections of pipeline, which are connected to each other through hinged connection of the pipeline. The pipeline section that forms the pipeline end is connected through hinged connection of the pipeline to inlet end of blowing pipe, while the pipeline section that forms the pipeline beginning is connected through the hinged connection of pipeline to connecting branch pipe of the stationary system of cleaning medium pipelines. Rotation axes of all hinged connections of the pipeline are located parallel to each other and are almost vertical.EFFECT: cleaning efficiency improvement.12 cl, 4 dwg

Plant for gas-pulse cleaning of heating surfaces // 2460956
FIELD: power industry.SUBSTANCE: plant includes pulse chambers with exhaust nozzles, periodically acting igniters, mixers with gas and air supply nozzles, which have shutoff and control valves, automatic control device (ACD) connected via electric circuits to periodically acting igniters and shutoff and control valves. Plant is equipped with multi-channel distributor of gas-air mixture, cutout devices for protection of tube system against contaminated flue gases, which are provided for exhaust nozzles of pulse chambers, and monitoring, blocking and alarm device (MB AD), sensors for fixation of position of shutoff and control valves and air and gas pressure gauges connected via electric circuits to MB AD that is connected via electric circuits to ACD respectively, multi-channel distributor of gas-air mixture, which is connected via electric circuits to MB AD and ACD, as well as cutout devices connected via electric circuits to MB AD and ACD too.EFFECT: higher reliability and safer operation of gas-pulse cleaning plant due to providing automatic monitoring of its operation; reduction of its overall dimensions.1 dwg

Flushing method for condenser with short-time return water flow // 2459173
FIELD: power industry.SUBSTANCE: flushing method of condenser with short-time return water flow due to using the condenser filled with water, with supply water conduit, discharge water conduit with shutoff gate valve, of upper drain water chamber having a manhole. Return water flow in condenser if formed at the following performance of the operations: shutoff gate valve is closed on discharge water conduit, manhole is opened on upper drain water chamber, and when air supply through it to condenser is completed, manhole is closed and normal operation of condenser is restored.EFFECT: invention allows creating short-time return water flow in condenser without preliminary emptying of condenser.1 dwg
 
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