Device for thermal afterburning waste gases with a high content of condensate
(57) Abstract:Device for thermal afterburning waste gases refers to industrial ecology and can be used when the fiery destruction of gaseous wastes containing condensate. The device includes a housing with a fitting for air supply, the swirl of air, fuel reservoir with the inlet fitting and the gas holes, the Central pipe with the inlet fitting and the swirl of waste gases, followed by an inner surface of the pipe is cut a spiral groove, a cutting direction which coincides with the direction of winding of the swirl waste gases, on the inner surface of which is planted nozzle for a gas stream, separating the peripheral channels for the liquid phase. To the Central nozzle attached the source of the ultrasound performed, for example, in the form of a piezoelectric transducer connected to a source of high frequency alternating current, and a source of high voltage direct current of one phase, the second phase of which is grounded. To the fuel reservoir through the heat-conducting elements may be attached one or more rods, the surface of which is made of mater the C zone of the location of the nucleus of the torch. The technical result is to increase the reliability of after-burning of condensate. 1 C.p. f-crystals, 1 Il. The invention relates to industrial ecology and can be used during plasma destruction of gaseous wastes containing condensate.A device for thermal afterburning waste gases with a high content of condensate, comprising a housing with a bleed air supply, a fuel reservoir with the inlet fitting and the gas holes, the Central pipe with the inlet fitting and the swirl of waste gases, followed by the inner surface of the cut spiral grooves, the cutting direction which coincides with the direction of winding of the swirl on the inner surface of which is planted nozzle for the gas flow and the ultrasound source, connected to the Central pipe, the inlet fitting which is located on the line of its zero displacement (RU, patent 2033578, CL F 23 G 7/06, 1995).A disadvantage of this device is the low reliability of dissolver condensate.The technical result of the invention is to improve the reliability of dissolver condensate.This result is achieved by the fact that the device for thermal Doge is ritel air, the fuel reservoir with the inlet fitting and the gas holes, the Central pipe with the inlet fitting and the swirl of waste gases, followed by the inner surface of the cut spiral grooves, the cutting direction which coincides with the direction of winding of the swirl on the inner surface of which is planted nozzle for the gas flow and the ultrasound source, connected to the Central pipe, the inlet fitting on a line of its zero displacement, according to the invention is equipped with a high voltage source of direct current, one phase connected to the Central pipe.This improves the reliability of dissolver condensation by increasing dispersion and monodispersity of its spray.In a preferred embodiment, the device is provided with at least one rod, the surface of which is made from a material with a continuous spectrum of radiation, fixed heat conducting elements on the fuel manifold in such a way that it passes through the zone of location of the nucleus of the torch.This further reduces the formation of dissolver emissions of oxides of nitrogen.In the drawing postnum condensate includes a housing 1 with the fitting 2 to supply air, swirl 3 air fuel reservoir 4 with the inlet fitting 5 and getviewsite holes 6, the Central pipe 7 with the inlet fitting 8 and 9 swirl waste gases, followed by an inner surface of the socket 7 cut a spiral groove 10, the cutting direction which coincides with the direction of winding of the swirl 9, on the inner surface of which is planted nozzle 11 to the gas stream, separating the peripheral channels 12 for the liquid phase. To the Central nozzle attached the source of the ultrasound performed, for example, in the form of piezoelectric preobrazovatelya 13 connected to a source 14 of high frequency alternating current, and the source of 15 high-voltage direct current of one phase, the second phase of which is grounded. To the fuel reservoir 4 through the heat-conducting elements 16 may be attached one or more rods 17, the surface of which is made of a material with a continuous spectrum of radiation, for example, made of ceramic, is placed in such a way that they pass through the zone location of the cores of flame.The device operates as follows.The air fed into the housing 1 through the nozzle 2 and then through the swirler 3 in the combustion volume. Fuel s, containing condensate, through the fitting 8 is served in the Central pipe 7, are formed in the swirl 9 and separated in the centrifugal field, the fluid in the spiral groove 10, and the gases in the cavity of the nozzle 7 is directed to the outlet pipe 7 into the combustion volume, where the gases through the nozzle 11, and the liquid through the channels 12 is removed from the pipe 7. Due to the supply from the source 15 to the pipe 7 high voltage constant potential and connection in a piezoelectric transducer 13 by passing current from a source of ultrasonic vibrations and their transmission to the Central pipe 7 happen fine atomization of the liquid phase from the end surface of the pipe 7 and its emission in the combustion zone of the flame of the fuel gases beyond its roots. Spraying condensate in the interaction field of ultrasonic oscillations and fields electrostatic forces can double to improve the dispersibility of the dispersion and to reduce the dispersion of the droplet size at least. This provides a more uniform intensive evaporation of condensate and ignition together with the waste gases.The location of the fitting 8 on the line of zero offsets kolabaeva with ultrasonic frequency pipe 7 minimizes dissipation by as oxidant in the combustion gas of the air causes oxidation of the contained nitrogen with oxygen at a temperature of about 1500-1600oC what happens in the core of the plume due to overlapping bands of radiation, water and carbon dioxide, which is the main products of the combustion of gaseous fuel. Located in the core of the flame rod 17 or set of rods provides both the convective and the radiative heat transfer from the core of the torch. When this energy emission surface of the rod 17 in a continuous spectrum eliminates heating of the products of combustion of the fuel in the core of the torch to a temperature sufficient for oxidation of nitrogen with oxygen. Convective heat rod 17 or set of such rods is transmitted through the retaining elements 16 to the manifold 4, washed with opposite surfaces of the streams of air and fuel gas heating which allows to improve the conditions of the burning torch and extra burner waste gases, respectively. If the device several rods 17 is preferred their chess position perpendicular to the axis of the torch in position as close as possible to vertical. With this arrangement, the rods 17 of the convective heat from the core of the torch is the most effective.Supply device terminals 17 in the greatest quantity at their minimum diameter is the most settled and completely eliminates the formation of zones of its local overheating, the temperature which may be sufficient for the formation of environmentally harmful nitrogen oxides.Thus, the proposed device allows to increase the reliability of dissolver condensate, and in the preferred embodiment, to reduce or eliminate the formation of nitrogen oxides when burning ignition gas emissions with a high content of condensate. 1. Device for thermal afterburning waste gases with a high content of condensate, comprising a housing with a bleed air flow, the swirl of air, fuel reservoir with the inlet fitting and the gas holes, the Central pipe with the inlet fitting and the swirl of waste gases, followed by the inner surface of the cut spiral grooves, the cutting direction which coincides with the direction of winding of the swirl on the inner surface of which is planted nozzle for the gas flow and the ultrasound source, connected to the Central pipe, the inlet fitting which is located on the line of its zero displacement, characterized in that it is provided with a high voltage DC source, one phase is connected to the Central pipe.2. The device according to p. 1, otlichayushiesya radiation spectrum, fixed heat conducting elements on the fuel manifold in such a way that it passes through the zone of location of the nucleus of the torch.
FIELD: burning waste gases of pyrolysis furnaces in reworking solid domestic wastes.
SUBSTANCE: proposed combustion chamber includes mixing chamber with active and passive nozzles mounted at its inlet; active and passive nozzles are connected respectively to compressed air source and to waste gas source; mixing chamber is made in form of diffuser at aperture angle of 10-18 deg; ratio of diameters of active and passive nozzles is equal to: Dact:Dpas=0.35-0.4.
EFFECT: enhanced economical efficiency of use of vapor-and-gas cycle.
2 cl, 1 dwg
FIELD: the invention refers to apparatus of regenerative thermal oxidation with multi pass valves.
SUBSTANCE: the apparatus for regenerative thermal oxidation for gas processing has a combustion zone, the first heat exchanging layer keeping heat exchanging surroundings and connecting with the combustion zone; the second heat exchanging layer keeping heat exchanging surroundings and connecting with the combustion zone; a valve for alternate direction of the gas flow between the first and the second heat exchanging layers. At that the valve has the first valve passage and the second valve passage separated from the first valve passage; a flow distributor having an admission passage communicates with the help of fluid medium with the admission opening of the surroundings and an exhaust passage communicates with the help of fluid medium with exhaust opening of fluid surroundings. At that the distributor is fulfilled with possibilities of its the first and the second valve passages between the first position in which the first valve passage communicates with the help of liquid with the admission passage and the second valve passage communicates with the help of liquid surroundings with exhaust passage and the second position in which the indicated the first valve passage communicates with the help of the fluid surrounding with exhaust passage and the second passage of the entry of the valve with the help of liquid surroundings communicates with the admission passage. At that the distributor of flow has a blocking surface which blocks the flow through the first part of the first valve passage and through the second part of the second valve passage when the distributor of the flow is between the first and the second positions and is fulfilled with possibility of its turning to 180o between the first and thesecond positions. At that valve passage is divided as the first so is the second at least into two chambers and the first and the second parts of the valve passages are congruous.
EFFECT: simplifies the construction, provides comfort of controlling and exploitation and deep removal of volatile organic combinations.
22 cl, 12 dwg
FIELD: technologies for combustion of flush gases, including those under high pressure, during extraction and processing of natural gas and oil.
SUBSTANCE: body of burner, mounted on gas inlet pipe, is made conical with widened portion at upper portion, in the body additionally mounted are two catalyst elements, at lower portion on inlet section first catalyst element is positioned, and above on outlet section - second catalyst element, rotary shutters are mounted on base of conical body in additional way, so that in closed position they are in contact with first catalyst element, and open position between first catalyst element and body gap is formed, also, device is additionally provided with one or more main torches, mounted in gas inlet pipeline below rotary shutters and first catalyst element. Relation of diameters of first and second catalyst elements matches relation of debits of hydrocarbon gas, fed in normal mode and during salvo exhaust. Catalyst elements are manufactured either in form of cell-like structured blocks with direction of channels in parallel to direction of feeding of flush gases, or in form of block sections with granulated catalyst, for example, Rachig rings, or in forms of block sections with active-catalyst metallic shavings, or in form of blocks with active-catalyst metallic meshes.
EFFECT: higher ecological safety and fullness of combustion of flush gases in broad flow range, simplified construction and comfort of maintenance.
6 cl, 3 dwg
FIELD: the invention refers to industrial ecology and may be used for flameless purification of ejections of industrial enterprises.
SUBSTANCE: the reactor for catalytic purification of gaseous ejections has a cylindrical body, which interior surface is covered with a catalyst with a source of infrared radiation placed in the body, a tube heat exchanger located in the lower part of the body, a turbine mixer located in the upper part of the body and additionally - a permeable cylindrical drum out of the catalyst so that the axles of the symmetry of the drum and body coincide. The drum embraces the mixer and the source of infrared radiation fulfilled in the shape of a six-ends star is installed in the middle of the body so that its flatness is perpendicular to the axle of the symmetry of the reactor. The drawing off socket is connected with the tube space of the heat exchanger, and the feeding socket is located so as to provide heating of gaseous ejections with the heat of the gases moving out of the reactor.
EFFECT: increases effectiveness of purification of gaseous flow and reduces power inputs for heating the gas flow.
FIELD: burning combustible gas at pressure above atmospheric.
SUBSTANCE: proposed plant is used for burning lean gases; it consists of unit for burning gas at pressure above atmospheric including lean gas chamber, combustion chamber, heat regeneration section and exhaust; pipe line supplying lean gas to lean gas chamber; heat removal and pressure equalizing chamber and preheated air chamber; plant is also provided with pipe line supplying the compressed surrounding air to heat removal and pressure equalizing chamber, preheated air pipe line for delivery of preheated air to preheated air chamber; provision is made for hole for delivery of lean gas from lean gas chamber to combustion chamber and hole for delivery of preheated air from preheated air chamber to combustion chamber. Heat removal and pressure equalizing chamber is made for heat exchange between lean gas chamber, preheated air chamber and combustion chamber and compressed surrounding air; lean gas and preheated air are burnt in combustion pressure at pressure above atmospheric.
EFFECT: enhanced efficiency; minimum difference in pressure between gas and air chambers.
12 cl, 12 dwg
FIELD: arrangements or devices for treating smoke or fumes.
SUBSTANCE: head comprises gas supply pipe with gas gate and protecting shield mounted outside and coaxially at the top end of the gas supply pipe. The protecting shield is composed of two baffles made of two hollow trancated cones mounted one on the other. The grater base of the top baffle faces downward, and that of the bottom baffle faces upward. The smaller base is connected with the gas supply pipe.
EFFECT: enhanced reliability and prolonged service life.
2 cl, 2 dwg
FIELD: power engineering.
SUBSTANCE: valve comprises rotatable housing provided with passage, outer unmovable ring seal of the housing, ring seal between the rotatable housing and outer unmovable ring seal of the housing that has bore made for permitting gas to flow to the passage or from the passage. The ring seal is movable with respect to the outer ring seal of the housing. The passage and the bore are made for permitting receiving the compressed gas to provide continuous sealing between the outer ring seal of the housing and ring seal when the housing rotates. The valve is additionally provided with means for permitting gas to flow through the radial passage and between the ring seal and outer unmovable ring seal of the housing and setting ring connected with the rotatable housing and locking ring that is mounted at a distance from the setting ring and connected with the rotatable housing. The ring seal is interposed between the setting ring and locking ring.
EFFECT: simplified structure and enhanced efficiency.
16 cl, 30 dwg
FIELD: toxic flue gas combustion technology for fuel-burning units.
SUBSTANCE: flue gases are neutralized in combustion chamber; total fuel flow is bifurcated; first fuel flow is mixed up with flue gases supplied to combustion chamber and second one is conveyed to combustion-chamber burners wherein it is burned in air environment and then passed to combustion chamber. Coke gas, flue gas, or blast-furnace gas, or generator gases, or mixture thereof can be used as fuel; total flowrate of flue gases (B"G) at combustion chamber outlet, total flowrate of fuel (BF) supplied to combustion chamber, flowrate of air (BA) supplied to combustion chamber, and flowrate of fuel (BF BRN) supplied to burners are found from following set of equations (1), (2), (3), (4):
, where B'G is flowrate of flue gases from combustion chamber outlet, kg/h; T'G is temperature of flue gases at combustion chamber inlet, °C; O'2 is oxygen content in flue gases at combustion chamber inlet, %; C'G is heat capacity of flue gases at combustion chamber inlet, kcal/kg; B"G is total flowrate of flue gases at combustion chamber outlet, kg/h; BF is total flowrate of fuel supplied to combustion chamber, kg/h; BF BRN is fuel flowrate to burners, kg/h; QF L is fuel low heating value as fired, kcal/kg; O2" is oxygen content in flue gases at combustion chamber outlet, %; VA O is theoretical air flowrate for burning 1 kg of fuel, kg/h; BA is air flowrate to combustion chamber, kg/h; TG" is gas temperature at combustion chamber outlet, °C; CG" is heat capacity of flue gases at combustion chamber outlet, kcal/kg; α is excess air coefficient. Temperature within combustion chamber is maintained between 850 and 1150 °C.
EFFECT: enhanced efficiency of flue gas neutralization in fuel-burning units.
1 cl, 1 dwg, 3 tbl, 1 ex
FIELD: chemical engineering.
SUBSTANCE: method comprises using gas made of a mixture of carbon dioxide and oxygen in the plasma burner. The plasma burner ionizes gas thus producing carbon monoxide and reactive oxygen that removes ash from the gas. Oxygen and vapor are sprayed and injected to chamber (3) that receives the device with plasma burner. The control system (6) is provided with feedback and controls the concentration of the production gas, nozzle, and plasma burner.
EFFECT: enhanced reliability.
29 cl, 3 dwg
FIELD: the invention is designed for ventilation and may be used at equipping industrial objects.
SUBSTANCE: the system of ventilation of an industrial object has local units of suction air with polluting substances, an airway connecting the local suction units with the suction branch pipe of a boiler's blow fan. The airway is connected through drainage with the pipeline located below it with condensed and liquid fractions of polluting substances. The pipeline is switched to the suction branch pipe of the boiler's blow fan.
EFFECT: increases reliability, economy of the ventilation system of an industrial object.
3 cl, 1 dwg