Bake for afterburning of flue gases
The invention relates to furnaces for afterburning of flue gases and can be used to solve environmental problems incineration of household and industrial waste. Effect: simplified construction and intensification of post-combustion of combustible components in the flue gas. Furnace cyclone-type for post-combustion flue gases comprises a cylindrical housing, a conical bottom with a device for the collection of ashes, cover with a drain to remove products of combustion and installed tangentially to the cylindrical housing of the device for introducing the flue gas into the furnace. Device for introducing the flue gas is made in the form of a mixer ejector type, the axis of which a plasma torch, the entraining gases plasma jet of air as oxidant. 2 Il.The invention relates to furnaces for afterburning of flue gases and can be used to solve environmental problems incineration of household and industrial waste.Waste incineration flue gases are formed, which contain products of incomplete combustion and thermal decomposition.In this regard, of great importance is the organization of the post-combustion of combustible gases contained in the flue gas.Closest to the present invention by the combination of features is kiln afterburning of flue gases (US 3817712, F 23 G 7/06, 18.06.1971). It consists of a cylindrical afterburners cyclone-type, pipe to enter the flue gas and the burner for supplying combustion products of the fuel, installed tangentially to the body of the furnace, a pipe for exit of products of combustion and nozzle for removal of ash.The disadvantages of this furnace is the presence of two tangential nozzles - input flue gas (exhaust hole) and products of fuel combustion (from burner), and insufficient efficiency of combustion of combustible components in the flue gas. One of the conditions of intensive combustion of gaseous substances is a good mixing of the combustible components of the oxidant is oxygen. Known furnace design for afterburning of flue gases does not provide high mixing. Flue gases entering cylindrica is carried out in a cylindrical housing also tangentially and in the same direction. These two streams of gases moving in a spiral, twisted in the same direction. As the gases move in the same direction, velocity gases are aligned and thereby deteriorates the mixing. At the same time, the speed of gas flow is not great, therefore, is not large value of the Reynolds number, and therefore mixing of the gases ineffective.The invention aims to simplify the design, intensification of post-combustion of combustible components in the flue gas.To solve the formulated problem in cyclone-type furnace for post-combustion flue gases containing cylindrical body, a conical bottom with a device for the collection of ashes, cover with a drain to remove products of combustion and installed tangentially to the cylindrical housing of the device for introducing the flue gas into the furnace, the device for introducing the flue gas is made in the form of a mixer ejector type, the axis of which a plasma torch, the entraining gases plasma jet of air as oxidant.The tangential location of the device to enter the flue gases to the cylindrical furnace housing need for the separation of solid non-combustible substances from flue gases. The location of the torch axis will sosite the I air-oxidant sucks flue gases, and in the ejector is heat treatment (destruction and oxidation) of the components in the composition of the flue gases. Due to the high speeds of the intense mixing of the gases.The plasma torch performs the role of the working nozzle of the ejector, which gives work (ejecting) the flow of high temperature (5000-6000(C) plasma jet air oxidant. The torch has two functions: 1 - the source of thermal energy, 2 - operating the nozzle of the ejector.Bake for afterburning of flue gases is shown in Fig.1 - General view and in Fig.2 is a cross section along a-A. It consists of a cylindrical body 1, the conical bottom 2, cover 3, the pipe for the escape of gases 4, the plasma torch 5, mixer ejector type 6.The oven works as follows: flue gases pass into a mixer ejector type 6 through the nozzle 7. In the plasma torch 5 through a connection pipe 13 enters the air, where it is heated in the electric arc to the plasma state, and a plasma current of air as oxidant through the nozzle 10 is fed into a mixer ejector type 6. In the confuser 12 mixer 6 flue gases are pre-mixed with the plasma jet of air as oxidant and carried it comes in a cylindrical part 11 of the mixer 6.The cultivation temperature of the mixture of gases is produced by changing current load of the plasma torch. With certain specified temperature, the mixture of gases is fed into a cylindrical furnace body 1, which is twisted in a spiral flow of gases, separated from non-combustible solid particles which are collected in the nozzle 9, is fed into the pipe 4. The combustion products are removed from the furnace through the nozzle 8. Destruction and afterburning of flue gases begins in the mixer 6, and ends with the ignition in the furnace.Thus, application of the proposed design of the furnace post-combustion flue gases provides high mixing of the flue gases and plasma jet of air as oxidant, resulting in the intensification of the process of afterburning, and also eliminates the need for supplying additional air to the burner for receiving products of combustion with high temperature, since some air is spent on fuel combustion. The application of this furnace design allows you to use the kinetic energy of the plasma jet of air as oxidant in the mixer ejector-type suction flue gases, as well as the simplified design of the furnace.Additional positive properties of the proposed design of the furnace afterburning of flue gases include:1. High temperature (5000-6000(C) plasma jet air-oxide is Dorogi and other (The temperature of the combustion of natural gas with air - 1875With, kerosene - 1930With gasoline - 1970C.) [A. M. Kitaev, J. A. Kitaev. Reference book welder. M.: Mashinostroenie, 1985, page 173].2. All particles of the flue gases are forced to pass through the high temperature zone of the plasma jet torch air as oxidant, in which the temperature of 5000-6000C.
ClaimsFurnace cyclone-type for post-combustion flue gases containing cylindrical body, a conical bottom with a device for the collection of ashes, cover with a drain to remove products of combustion and installed tangentially to the cylindrical housing of the device for introducing the flue gas into the furnace, characterized in that the device for introducing the flue gas is made in the form of a mixer ejector type, the axis of which a plasma torch, the entraining gases plasma jet of air as oxidant.
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