CN210601636U

CN210601636U - Incineration treatment system capable of effectively reducing harmful flue gas

Info

Publication number: CN210601636U
Application number: CN201921265461.6U
Authority: CN
Inventors: 陈景波; 郑顺富; 王文飞
Original assignee: Taizhou Dechang Environmental Protection Co Ltd
Current assignee: Taizhou Dechang Environmental Protection Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-05-22
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses an effectively reduce incineration disposal system of harmful flue gas can carry out effective decrement control to the harmful substance in the flue gas, and its technical scheme main points are rotary kiln, two combustion chambers and three combustion chambers including intercommunication in proper order, all be equipped with the air-supply line on rotary kiln, two combustion chambers and the three combustion chambers, be equipped with first trachea between two combustion chambers and the three combustion chambers, be equipped with first aqueous ammonia spray tube in the first trachea, still be equipped with the second trachea on the three combustion chambers, be equipped with second aqueous ammonia spray tube on the second trachea, the spout of first aqueous ammonia spray tube and second aqueous ammonia spray tube all just is setting up with flue gas flow direction, and the tracheal rear of second still has connected gradually waste heat recovery device, electrostatic precipitator and sack dust collector, the utility model is suitable for a dangerous useless processing technology field.

Description

Incineration treatment system capable of effectively reducing harmful flue gas

Technical Field

The utility model belongs to the technical field of the useless processing of danger, refer in particular to an effectively reduce burning processing system of harmful flue gas.

Background

With the rapid development of the economy of China, the generation amount of hazardous wastes is increased sharply. In view of the potential environmental risks and the threat to human health, hazardous wastes have become one of the major environmental problems facing China. The pollution and the harm of the hazardous waste have the following characteristics that the hazardous waste is always high in pollution concentration and easy to accumulate, can directly generate serious harm to ecological and human living environments through various forms and ways, has long-term and latent harmfulness, and is difficult to recover or even impossible to recover the consequences and hidden dangers, or is extremely high in cost, and meanwhile, the hazardous waste is various in types, different in pollution components and large in characteristic difference. Hazardous waste should therefore be more safely and properly treated and disposed of than other solid waste. In the conventional incineration treatment process, Nitrogen Oxides (NO) are generated_x) Is generated from nitrogen in the air and nitrogen in the material. NO produced in the incinerator will be converted to NO in the atmosphere₂，NO₂Is a reddish-brown gas, which causes serious damage to the lungs of a human body and also causes reduced visibility. In addition, NO reacts very readily with hydrocarbons in the air under the action of sunlight, thereby generating more N0₂And organic radiation, which cause serious damage to the atmospheric ozone layer, and in addition, the generated high-temperature smoke also contains other harmful substances and also needs to be recycled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an effectively reduce incineration disposal system of harmful flue gas can carry out effective decrement control to the harmful substance in the flue gas.

The purpose of the utility model is realized like this: the utility model provides an effectively reduce burning processing system of harmful flue gas, includes rotary kiln, second combustion chamber and the third combustion chamber that communicates in proper order, its characterized in that: the rotary kiln, the second combustion chamber and the third combustion chamber are respectively provided with an air inlet pipe, a first air pipe is arranged between the second combustion chamber and the third combustion chamber, a first ammonia water spray pipe is arranged in the first air pipe, a second air pipe is further arranged on the third combustion chamber, a second ammonia water spray pipe is arranged on the second air pipe, the spray nozzles of the first ammonia water spray pipe and the second ammonia water spray pipe are arranged right opposite to the flowing direction of flue gas, and the rear part of the second air pipe is sequentially connected with a waste heat recovery device, an electrostatic dust collector and a cloth bag dust collector.

By adopting the technical scheme, the rotary kiln is of a cylindrical rotary structure, the outer wall is made of steel, the inner wall is made of refractory materials, the rotary kiln is driven to slowly rotate by the rotary driving device, the temperature in the rotary kiln is controlled to be 800-; after high-temperature flue gas generated by burning in the rotary kiln enters a secondary combustion chamber, air is introduced through an air inlet pipe, so that the high-temperature flue gas becomes peroxy combustion in the secondary combustion chamber, and the temperature is controlled between 1100 ℃ and 1200 ℃, so that dioxin and furan substances are fully decomposed; then the flue gas generated in the secondary combustion chamber enters a tertiary combustion chamber for further combustion, air is introduced, and the temperature is controlled between 1100 ℃ and 1200 ℃, so that dioxin and furan substances are further fully decomposed; the atomized ammonia water is sprayed into the flue gas through the first ammonia water spray pipe and the second ammonia water spray pipe, and NO is sprayed into the flue gas_xThe nitrogen and the water are reduced into nitrogen and water, and the nozzles are arranged opposite to the flowing direction of the flue gas, namely, the atomized ammonia water and the flue gas are in countercurrent contact, so that the removal rate of the nitrogen oxide is greatly improved, and the consumption of the ammonia water is greatly reduced; then the high-temperature flue gas is cooled through a waste heat recovery device, heat is recovered, and smoke and dust are removed through an electrostatic dust collector and a cloth bag dust collector; in addition, in the actual incineration process, the temperature is controlled below 1200 ℃, so that the possibility that nitrogen in the air is synthesized into NO under the high-temperature condition can be reduced.

The utility model discloses further set up to: the waste heat recovery device comprises a gas collecting hood, a water tank and an exhaust hood which are sequentially arranged from bottom to top, wherein a plurality of heat exchange tubes are arranged in the water tank, the gas collecting hood is communicated with the exhaust hood through the heat exchange tubes, a filter screen is arranged in the gas collecting hood, an ash collecting hopper is arranged at the bottom of the gas collecting hood, a second gas pipe is communicated with the gas collecting hood, and the gas outlet end of the second gas pipe is positioned below the filter screen.

By adopting the technical scheme, the water tank is provided with the water inlet pipe and the water outlet pipe, and when the flue gas passes through the heat exchange pipe, the heat is recovered through the water in the water tank and the flue gas is cooled; the filter screen can the multilayer and adopt the metal material, and when the flue gas passed through the filter screen, partial dust was held back by the filter screen and is fallen into the dust collecting hopper, and is the from bottom to top flow by the flow direction with the flue gas in the heat transfer pipe, and partial dust in the flue gas can sink because of self gravity reason among the flow process, consequently through waste heat recovery device's structural design, can retrieve the heat in the flue gas, can carry out the prefilter collection to the dust in the flue gas again.

The utility model discloses further set up to: the sack dust collector includes the dust removal case, the dust removal incasement is equipped with by supreme collection ash district that sets gradually down, advance the cigarette district, the diversion district, the dust removal district is distinguished and goes out the cigarette district, the dust removal district is including installing the card in the dust removal incasement, frame on the installation card and be fixed in the filter bag on the frame, advance to be equipped with on the cigarette district with the advancing tobacco pipe of electrostatic precipitator intercommunication, the diversion district is including installing the blower inlet housing in the dust removal incasement, be equipped with the honeycomb duct of a plurality of vertical settings in the blower inlet housing, still be equipped with into the petticoat pipe in advancing the cigarette district, honeycomb duct and advance through advancing the petticoat pipe intercommunication, it is equipped with the ash mouth that goes out with collection ash.

By adopting the technical scheme, the electrostatic dust collector is the existing equipment, the negative electrode is made of metal wires with different section shapes, called as a discharge electrode, the positive electrode is made of metal plates with different geometric shapes, called as a dust collecting electrode, the working principle is that a high-voltage electric field is utilized to ionize smoke, and dust in air flow is separated from the air flow under the action of the electric field, so that the dust collecting effect is achieved; flue gas after electrostatic precipitator handles gets into the dust removal case and handles, and the inside principle of dust removal incasement is: after entering the dust removal area from the flow guide area, the smoke is filtered by the filter bag and then enters the smoke outlet area from the through holes on the pattern plate to be discharged; can avoid the flue gas to form the sinuous flow in the dust removal incasement through honeycomb duct and the setting of advancing the cigarette cover, play the guide effect to the air current, and the flue gas air current is at the ascending in-process, the collision friction between dust impurity and the honeycomb duct, can make the dust fall in advance, reduce the direct adhesion of dust and on the filter bag surface probably, through the setting of advancing the cigarette cover, can avoid in the collection cigarette district the dust of whereabouts to receive the air current influence again and sneak into the flue gas again, improve final dust removal effect, extension single dust removal time.

The utility model discloses further set up to: the smoke inlet pipe is provided with an active carbon blowing device, the active carbon blowing device comprises an active carbon bin, a screw conveyor and a blowing pipe, the feeding end of the screw conveyor is located below the active carbon bin, the discharging end of the screw conveyor is communicated with the blowing pipe, and the discharging end of the blowing pipe is communicated with the smoke inlet pipe.

By adopting the technical scheme, the principle of the activated carbon blowing device is as follows: the activated carbon particles in the activated carbon bin enter the blowing pipe at regular time and quantity through the screw conveyer, and the blowing pipe blows the activated carbon particles into the smoke inlet pipe through the fan; when flue gas flows in the smoke inlet pipe, activated carbon particles are blown in, the activated carbon particles are scattered in the air flow by means of the flue gas flow, the flue gas inlet pipe is in contact with the guide pipe for a long time, the activated carbon particles are used for absorbing heavy metal and dioxin, and are finally attached to the wall of the filter bag, the heavy metal and dioxin in the flue gas can be continuously absorbed, then the flue gas falls into an ash collecting area during ash removal, the flue gas is discharged together with falling ash in the dust removing box, and the sufficient contact time between the flue gas and the activated carbon particles is prolonged by the arrangement of the guide pipe.

The utility model discloses further set up to: the smoke outlet area is provided with a smoke outlet pipe, and the smoke outlet area is also internally provided with a dust blowing pipe.

Through adopting above-mentioned technical scheme, blow the dirt pipe and also be connected with the fan, after using a period, close into tobacco pipe and go out the tobacco pipe, open the ash pipe and blow, blow into the dust collecting area with the dust on the filter bag wall and the dust on the water conservancy diversion pipe wall in, can play the abluent effect of dust removal to the filter bag promptly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the internal structure of the waste heat recovery device and the cloth bag dust collector of the present invention;

FIG. 3 is a schematic structural view of an activated carbon blowing device according to the present invention;

the reference numbers in the figures are: 1. a rotary kiln; 2. a second combustion chamber; 3. a third combustion chamber; 4. an air inlet pipe; 5. a first air pipe; 6. a second air pipe; 7. a first ammonia water nozzle; 8. a second ammonia injection pipe; 9. a waste heat recovery device; 10. an electrostatic precipitator; 11. a bag type dust collector; 12. a gas-collecting hood; 13. a water tank; 14. an exhaust hood; 15. a heat exchange pipe; 16. filtering with a screen; 17. a dust collecting hopper; 18. a dust removal box; 19. an ash collecting area; 20. a pattern plate; 21. a frame; 22. a filter bag; 23. a smoke inlet pipe; 24. a guide shell; 25. a flow guide pipe; 26. a smoke inlet hood; 27. an activated carbon bin; 28. a screw conveyor; 29. blowing a pipe; 30. discharging the smoke tube; 31. a dust blowing pipe.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which figures 1 to 3:

the utility model provides an effectively reduce incineration disposal system of harmful flue gas, includes rotary kiln 1, two combustion chambers 2 and three combustion chambers 3 that communicate in proper order, its characterized in that: the rotary kiln comprises a rotary kiln body 1, a second combustion chamber 2 and a third combustion chamber 3, wherein air inlet pipes 4 are arranged on the rotary kiln body 1, the second combustion chamber 2 and the third combustion chamber 3, a first air pipe 5 is arranged between the second combustion chamber 2 and the third combustion chamber 3, a first ammonia water spray pipe 7 is arranged in the first air pipe 5, a second air pipe 6 is further arranged on the third combustion chamber 3, a second ammonia water spray pipe 8 is arranged on the second air pipe 6, the spouts of the first ammonia water spray pipe 7 and the second ammonia water spray pipe 8 are all arranged right opposite to the flowing direction of flue gas, and a waste heat recovery device 9, an electrostatic dust collector 10 and a cloth bag dust collector 11 are sequentially.

By adopting the technical scheme, the rotary kiln 1 is of a cylindrical rotary structure, the outer wall is made of steel, the inner wall is made of refractory materials, the rotary kiln is driven to slowly rotate by the rotary driving device, the temperature in the rotary kiln is controlled to be 800-1000 ℃, and the hazardous wastes are incinerated; after high-temperature flue gas generated by burning in the rotary kiln 1 enters the secondary combustion chamber 2, air is introduced through the air inlet pipe 4 to ensure that the high-temperature flue gas becomes peroxy combustion in the secondary combustion chamber 2, and the temperature is controlled between 1100 ℃ and 1200 ℃ so as to fully decompose dioxin and furan substances; then the flue gas generated by the secondary combustion chamber 2 enters a tertiary combustion chamber 3 for further combustion, air is introduced, and the temperature is controlled between 1100 ℃ and 1200 ℃, so that dioxin and furan substances are further fully decomposed; the atomized ammonia water is sprayed into the flue gas through the first ammonia water spray pipe 7 and the second ammonia water spray pipe 8, NOx is reduced into nitrogen and water, and the nozzles are arranged opposite to the flow direction of the flue gas, namely the atomized ammonia water and the flue gas are in countercurrent contact, so that the removal rate of nitrogen oxides is greatly improved, and the consumption of the ammonia water is greatly reduced; then the high-temperature flue gas is cooled by a waste heat recovery device 9, heat is recovered, and smoke and dust are removed by an electrostatic dust collector 10 and a cloth bag dust collector 11; in addition, in the actual incineration process, the temperature is controlled below 1200 ℃, so that the possibility that nitrogen in the air is synthesized into NO under the high-temperature condition can be reduced.

The utility model discloses further set up to: the waste heat recovery device 9 comprises a gas collecting hood 12, a water tank 13 and an exhaust hood 14 which are sequentially arranged from bottom to top, a plurality of heat exchange tubes 15 are arranged in the water tank 13, the gas collecting hood 12 is communicated with the exhaust hood 14 through the heat exchange tubes 15, a filter screen 16 is arranged in the gas collecting hood 12, an ash collecting hopper 17 is arranged at the bottom of the gas collecting hood 12, a second gas pipe 6 is communicated with the gas collecting hood 12, and the gas outlet end of the second gas pipe 6 is positioned below the filter screen 16.

By adopting the technical scheme, the water tank 13 is provided with the water inlet pipe and the water outlet pipe, and when the flue gas passes through the heat exchange pipe 15, the heat is recovered through the water in the water tank 13 and the flue gas is cooled; the filter screen 16 can the multilayer and adopt metal material, and when the flue gas passed through filter screen 16, part dust was held back by filter screen 16 and is fallen into the ash collecting hopper 17, and is flowed from bottom to top by the flow direction with the flue gas in heat exchange tube 15, and the part dust in the flue gas can sink because of self gravity reason in the flow process, consequently through waste heat recovery device 9's structural design, can retrieve the heat in the flue gas, can carry out the prefilter collection to the dust in the flue gas again.

The utility model discloses further set up to: the cloth bag dust removing device 11 comprises a dust removing box 18, an ash collecting area 19, a smoke inlet area, a flow guide area, a dust removing area and a smoke outlet area are sequentially arranged in the dust removing box 18 from bottom to top, the dust removing area comprises a pattern plate 20 installed in the dust removing box 18, a frame 21 installed on the pattern plate 20 and a filter bag 22 fixed on the frame 21, a smoke inlet pipe 23 communicated with the electrostatic dust collector 10 is arranged in the smoke inlet area, the flow guide area comprises a flow guide shell 24 installed in the dust removing box 18, a plurality of vertically arranged flow guide pipes 25 are arranged in the flow guide shell 24, a smoke inlet cover 26 is further arranged in the smoke inlet area, the flow guide pipes 25 are communicated with the smoke inlet pipe 23 through the smoke inlet cover 26, and an ash outlet communicated with the ash collecting area 19 is formed in the bottom of the smoke inlet.

By adopting the technical scheme, the electrostatic dust collector 10 is the existing equipment, the negative electrode is made of metal wires with different section shapes, called as a discharge electrode, the positive electrode is made of metal plates with different geometric shapes, called as a dust collecting electrode, the working principle is that a high-voltage electric field is utilized to ionize smoke, and dust in airflow is separated from the airflow under the action of the electric field to play a role in dust collection; the flue gas after the electrostatic precipitator 10 handles gets into dust removal case 18 and handles, and the inside principle of dust removal case 18 is: after entering the dust removal area from the diversion area, the flue gas is filtered by the filter bag 22 and then enters the smoke outlet area from the through holes on the pattern plate 20 to be discharged; can avoid the flue gas to form the sinuous flow in dust removal case 18 through honeycomb duct 25 and the setting of advancing cigarette cover 26, play the guide effect to the air current, and the flue gas air current is at the ascending in-process, the collision friction between dust impurity and honeycomb duct 25, can make the dust fall in advance, reduce the direct adhesion of dust in the possibility on filter bag 22 surface, through the setting of advancing cigarette cover 26, can avoid the dust that has fallen in the collection cigarette district to receive the air current again and influence and sneak into the flue gas again, improve final dust removal effect, prolong single dust removal time.

The utility model discloses further set up to: the smoke inlet pipe 23 is provided with an active carbon blowing device, the active carbon blowing device comprises an active carbon bin 27, a screw conveyor 28 and a blowing pipe 29, the feeding end of the screw conveyor 28 is positioned below the active carbon bin 27, the discharging end of the screw conveyor 28 is communicated with the blowing pipe 29, and the discharging end of the blowing pipe 29 is communicated with the smoke inlet pipe 23.

By adopting the technical scheme, the principle of the activated carbon blowing device is as follows: the activated carbon particles in the activated carbon bin 27 are regularly and quantitatively fed into the blowing pipe 29 through the screw conveyor 28, and the blowing pipe 29 blows the activated carbon particles into the smoke inlet pipe 23 through the fan; that is, when the flue gas flows in the flue gas inlet pipe 23, the activated carbon particles are dispersed in the flue gas by means of the flue gas flow due to the blowing-in of the activated carbon particles, and are contacted with the flue gas inlet pipe 23 and the flow guide pipe 25 for a long time to perform the adsorption and filtration functions, and the activated carbon particles adsorbing heavy metals and dioxin are finally attached to the wall of the filter bag 22, and can also continuously adsorb heavy metals and dioxin in the flue gas, and then fall into the ash collection area 19 during ash removal, and are discharged together with the falling ash in the dust removal box 18, and the sufficient contact time between the flue gas and the activated carbon particles is prolonged by the arrangement of the flow guide pipe 25.

The utility model discloses further set up to: the smoke outlet area is provided with a smoke outlet pipe 30, and the smoke outlet area is also provided with a dust blowing pipe 31.

By adopting the technical scheme, the dust blowing pipe 31 is also connected with the fan, after the dust blowing pipe is used for a period of time, the smoke inlet pipe 23 and the smoke outlet pipe 30 are closed, the dust outlet pipe is opened for blowing, and dust on the wall of the filter bag 22 and dust on the wall of the flow guide pipe 25 are blown into the dust collection area 19, so that the dust removal and cleaning effects on the filter bag 22 can be achieved.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an effectively reduce incineration disposal system of harmful flue gas, includes rotary kiln (1), two combustion chambers (2) and three combustion chambers (3) that communicate in proper order, its characterized in that: the rotary kiln is characterized in that air inlet pipes (4) are arranged on the rotary kiln (1), the second combustion chamber (2) and the third combustion chamber (3), first air pipes (5) are arranged between the second combustion chamber (2) and the third combustion chamber (3), first ammonia water spray pipes (7) are arranged in the first air pipes (5), second air pipes (6) are further arranged on the third combustion chamber (3), second ammonia water spray pipes (8) are arranged on the second air pipes (6), nozzles of the first ammonia water spray pipes (7) and the second ammonia water spray pipes (8) are all arranged right opposite to the flowing direction of flue gas, and a waste heat recovery device (9), an electrostatic dust collector (10) and a cloth bag dust removal device (11) are sequentially connected to the rear side of the second air pipes (6).

2. The incineration disposal system for effectively reducing harmful flue gas according to claim 1, wherein: the waste heat recovery device (9) comprises a gas collecting hood (12), a water tank (13) and an exhaust hood (14) which are sequentially arranged from bottom to top, wherein a plurality of heat exchange tubes (15) are arranged in the water tank (13), the gas collecting hood (12) and the exhaust hood (14) are communicated through the heat exchange tubes (15), a filter screen (16) is arranged in the gas collecting hood (12), an ash collecting hopper (17) is arranged at the bottom of the gas collecting hood (12), a second air pipe (6) is communicated with the gas collecting hood (12), and the air outlet end of the second air pipe (6) is located below the filter screen (16).

3. The incineration disposal system for effectively reducing harmful flue gas according to claim 1, wherein: cloth bag dust collector (11) are including dust removal case (18), be equipped with in dust removal case (18) by supreme collection ash district (19) that set gradually down, advance the cigarette district, the diversion district, dust removal district and play cigarette district, the dust removal district is including installing card (20) in dust removal case (18), frame (21) on installation card (20) and be fixed in filter bag (22) on frame (21), it advances to be equipped with on the cigarette district advances tobacco pipe (23) with electrostatic precipitator (10) intercommunication, the diversion district is including installing blower housing (24) in dust removal case (18), be equipped with honeycomb duct (25) of a plurality of vertical settings in blower housing (24), it still is equipped with into petticoat pipe (26) in the cigarette district to advance, through advancing petticoat pipe (26) intercommunication between honeycomb duct (25) and advancing petticoat pipe (23), it is equipped with the ash outlet that collection ash district (19) communicate to advance petticoat pipe (26) bottom.

4. The incineration disposal system for effectively reducing harmful flue gas according to claim 3, wherein: the smoke inlet pipe (23) is provided with an active carbon blowing device, the active carbon blowing device comprises an active carbon bin (27), a screw conveyor (28) and a blowing pipe (29), the feeding end of the screw conveyor (28) is positioned below the active carbon bin (27), the discharging end of the screw conveyor (28) is communicated with the blowing pipe (29), and the discharging end of the blowing pipe (29) is communicated with the smoke inlet pipe (23).

5. The incineration disposal system for effectively reducing harmful flue gas according to claim 3, wherein: the smoke outlet area is provided with a smoke outlet pipe (30), and the smoke outlet area is also provided with a dust blowing pipe (31).