Device for burning waste gases
(57) Abstract:The invention relates to industrial ecology and can be used for purification of waste gases in industry. The device contains a coaxially mounted in the cylindrical housing, the inner surface of which is coated with a catalyst, a source of infrared rays, a spiral swirl and disk elements with the guide edges, the catalyst coating on the outer surface and end-to-end channels, co-directed channels helical swirl. 1 Il. The invention relates to industrial ecology and can be used in flameless purification of waste gases of industrial plants.A device for combustion of waste gases containing cylindrical body, the inner surface of which is coated with a catalyst that is installed at the entrance in case a spiral swirl with the guide channels and coaxially with the housing installed in its cavity, a source of infrared rays (SU, ed.St. N 788896, CL F 23 G 7/06, 1986).The disadvantages of this device are low gas purification efficiency and high energy consumption.The technical result of the invention is to improve a device for combustion of waste gases, containing cylindrical body, the inner surface of which is coated with a catalyst that is installed on the casing inlet spiral swirl with the guide channels and coaxially with the housing installed in its cavity, a source of infrared rays, according to the invention, equipped with disk elements with the guide edges, made with continuous channels, inclined to the body axis at the angle of gradient forming guide channels helical swirl, and a catalyst coating on the outer surface.This allows to increase the efficiency of gas cleaning by providing increased likelihood of contact with catalyst pollutant and intensification of mass transfer in the gas stream and to reduce the energy intensity by increasing the probability of contact of the activated infrared pollutant with the catalyst in comparison with its transition in the equilibrium state.The drawing shows a diagram of the device.Device for burning waste gases comprises a cylindrical housing 1, the inner surface of which is coated with a catalyst that is installed at the inlet of the housing 1 swirl 2 with the guide channels 3 and coaxially to the casing oral channels 6, inclined to the axis of the housing 1 at the elevation angle of helix forming guide channels 3 swirl 2, and the catalyst coating on the outer surface.When the device is a gas release serves into the body 1 through the spiral channels 3 swirl 2 in which the pollutant molecules are activated by an infrared radiation source 4 and are oxidized to harmless substances on the surface of the catalyst coating of the housing 1 and the disk element 5 to move in the equilibrium state. This is because when the interaction of the gas flow with the disk elements 5 is an intensive contact with them axial layers of the gas flow and deformation to the periphery of the housing 1, where it is intensively covered washes the catalyst surface of the housing 1. At the same time part of the axial layers of the gas stream passes through the disk elements on channels 6, which arrangement provides the lowest energy consumption, because the directed movement of a gas stream, organized by the swirler 2, which leads to the ejection of gas from the peripheral layers in the axial region of the housing 1 in the rarefaction zone and intensive washing of the opposite surface of the disk elements 5. Thus, it is day, and enhances the probability of contact of the activated infrared contaminant from the surface of the catalyst compared to the probability of return in equilibrium. The result is a more efficient purification of a gas stream from a contaminant at a lower energy consumption for the activation of the contaminant. The thus treated gas stream is discharged from the housing 1 and is discharged into the atmosphere.Thus, the proposed device provides improved efficiency of gas purification and reduction of energy consumption. Device for burning waste gases containing cylindrical body, the inner surface of which is coated with a catalyst that is installed at the entrance in case a spiral swirl with the guide channels and coaxially with the housing installed in its cavity, a source of infrared rays, characterized in that it is provided with a disk elements with the guide edges, made with continuous channels, inclined to the body axis on the elevation angle of helix forming guide channels helical swirl, and a catalyst coating on the outer surface.
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