Method of firing resin refractories
(57) Abstract:The invention relates to metallurgy, and more specifically to the refractory lining of metallurgical units. The technical effect of the use of the invention is to achieve a complete post-combustion gases from solastalgia refractories during heat treatment, including benzpyrene to carbon dioxide and water. How ambiga resin refractories carried out by impact with the oxy-fuel flame with a temperature of at least 2000oTo achieve a surface temperature refractories, not below 600oWith, the walls of the afterburner is heated to temperatures above 1000oAnd Inuktitut gases oxygen stream and burn in oxygen flame with a temperature not less than 1300oC. The invention relates to metallurgy, and more specifically to the refractory lining of metallurgical units.There is a method of neutralizing gases released during the heat treatment of the resin refractories, including the combustion gases. This produces a burning axial flow auxiliary fuel with obtaining high-temperature gases, serves tangential flow of the mixture of the environment, the 300aboutWith over 0,05-0,4 C. After exposure to the mixture additionally served oxidant in the form of one or more threads 
The disadvantage of this method is palletirovanie exhaust gases in the preliminary heat. This is because the splitting of the exhaust gases on the carbon and hydrogen are most effectively implemented without palletirovaniya waste gases other gases and at a lower temperature. This reduces the efficiency of the preparation process of the reaction mixture by mixing streams of gases in the secondary combustion chamber. The result is not a full afterburning released from the refractory gases that degrades the environment in the production of resin refractories.The closest in technical essence is a method of heat treatment of the resin refractories, including the decomposition gases in the presence of the reagent. When gases are heated in the heater and sent to the tunnel from which the gases are again sent to the heater. The excess gases are selected and digets in the presence of reagents in a special furnace with the aim of neutralizing medium substances formed by the decomposition of si. Heat treatment temperature is about 300aboutWith, the refractory product is cooled to 50aboutWith the heat treatment time is 8 hours, including in the area of proper heat treatment 5 h 
The disadvantage of this method is the partial oxidation gases, including benzpyrene, the most dangerous from an environmental point of view. This is due to the fact that the processing of the resin-product gases heated in the heater, do not provide the required intensity of removal of benzpyrene and the energy level of the post-combustion of the abundance of these gases in the gas torch is not sufficient for decomposition chemically stable hydrocarbons (acrolein, benzpyrene and other). The degree of post combustion of these hydrocarbons in the existing post combustion chambers does not exceed 95-96% which is not enough to ensure sanitary standards in the working area.The technical effect of the use of the invention is to achieve a complete post-combustion gases from the refractories during heat treatment, including benzpyrene to carbon dioxide and water.This technical effect is reached by the fact that the heat-treated resin-refractory carried out by exposure to the gas is below 600aboutWith heated walls of the afterburner to a temperature above 1000aboutWith, Inuktitut gases oxygen jet and dorogaya oxygen flame with a temperature not less than 1300aboutC.Full afterburning and thus complete neutralization of gases will occur because as reagent use oxygen. This greatly increases the temperature of the combustion gases, which intensifies the process of decomposition gases from refractory carbon and hydrogen. The breakdown of hydrocarbons into simpler compounds contributes preheated to 600aboutWith plantatreeusa structure formed on the surface of the lining and having catalytic properties. This process occurs with high intensity as gases not Ballesteros inert substances such as nitrogen from the air. As practice shows, already at this stage compounds such as benzpyrene, broken down into simpler and lagcoivaarita hydrocarbons naphthalene series. Subsequent mixing with the reactant (oxygen) injection by way of these compounds already in the hot tunnel afterburners completely burned to dioxi what arnosti selection of refractories gases. At smaller values decrease the degree of gas evolution. Large values set does not make sense, because it would be a waste of energy without further intensification of gas emissions.The surface temperature of the refractories at least 600aboutWith due regularity evaporation of resinous substances in the body of the refractories. At lower values, there will be no venting of refractories. For large values will be a waste of energy without further intensify the removal of gases.The temperature of the oxygen torch not less than 1300aboutWith due regularity of the decomposition gases. At smaller values will not achieve the required intensity of the decomposition gases. For large values will be a waste of energy without further intensification of decomposition gases.Below is an example implementation of the proposed method, which does not exclude other options within the claims.P R I m m e R. Products from melodramatic of refractories for the lining of steel ladles or converters, put in the work area lined Agra is the second allocated resinous substance, under the influence of high-temperature oxy-fuel torch to split, forming on the surface of the refractories carbon-ceramic structure.When the temperature reached on the surface of the refractories at least 600aboutIts inner layer is heated to a temperature sufficient for evaporation of harmful substances, including benzpyrene, having a boiling point of 495aboutC.Next, the released gases injections oxygen stream into the channel of the diffuser injector. This ensures the preparation of the reaction mixture with optimum excess oxygen in it within 10-12% of the burner Wall of the channel is heated to a temperature of at least 1000aboutC, and the temperature of the flame in the channel support is not less than 1300aboutC. under these conditions, complete oxidation and neutralization of carbon-hydrogen gases, including benzpyrene, which decomposes into water and carbon dioxide.The application of the proposed method using a gas-oxygen reaction mixture allows to increase the degree of neutralization of gases released from the refractory to the level of not lower than 99.9% of including completely eliminate the allocation of benzo-pyrene, which znecistenych refractories. METHOD of FIRING RESIN REFRACTORY materials by heating them with subsequent oxidation released from the refractory gases in the secondary combustion chamber, characterized in that the heating of the resin refractories are gas-oxygen flame with a temperature of at least 2000oTo achieve the temperature on the surface is not below 600oWith, the walls of the afterburner is heated to temperatures above 1000oWith, Inuktitut there oxygen stream released from the refractory gases and dorogaya their oxygen flame with a temperature not less than 1300oC.
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