CN210699445U

CN210699445U - Asphalt smoke waste gas treatment system

Info

Publication number: CN210699445U
Application number: CN201920939061.2U
Authority: CN
Inventors: 张波; 杨再华; 彭国彪; 周涛; 倪张进; 黄桂宝; 雷强; 刘仲毅; 王祖江; 杨再文
Original assignee: Xiamen Aidite Environmental Technology Co ltd
Current assignee: Xiamen Aidite Environmental Technology Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-06-09
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses an asphalt smoke exhaust-gas treatment system, include air exhaust fan, spray set, adsorption equipment, thermal desorption intake pipe and fire burning furnace. The spray device comprises a spray tower, an absorption liquid storage tank, a micro-bubble generator and a circulating pump which are connected in sequence, an air exhaust fan is connected with the lower part of the spray tower, the bottom of the spray tower is connected with the absorption liquid storage tank through an absorption liquid pipe, a spray head is arranged in the spray tower, and the spray head is connected with the circulating pump through a spray pipe. Adsorption equipment includes that a plurality of adsorbs the case, adsorbs the bottom of the case portion and is equipped with intake pipe and desorption blast pipe, and the top is equipped with the blast pipe, is equipped with the adsorption carrier in the adsorption case, and thermal desorption intake pipe links to each other with the top of adsorption case. The inlet end that fires burning furnace links to each other with the desorption fan, and the desorption fan links to each other with the desorption blast pipe, and clean air delivery pipe is connected to the exhaust end, is equipped with the valve on intake pipe, blast pipe, thermal desorption intake pipe and the desorption blast pipe respectively. The utility model discloses purification efficiency is high, and the desorption gas is carbon dioxide and water, no secondary pollution.

Description

Asphalt smoke waste gas treatment system

Technical Field

The utility model belongs to organic waste gas handles the field, in particular to glance coal exhaust-gas treatment system.

Background

The asphalt smoke waste gas generated in the production process of the waterproof coiled material contains volatile gases such as hydrogen sulfide, mercaptan, polycyclic aromatic hydrocarbon and the like, and the asphalt smoke is large in air volume, small in concentration and bad in smell, and can pollute the environment and endanger the health of workers if not treated. At present, the most common process is to treat the waste gas by adopting a UV ultraviolet light adsorption or incineration process, but the existing asphalt smoke treatment process still has many defects, such as poor treatment effect, difficulty in eliminating peculiar smell, high energy consumption and the like. In order to further ensure the processing efficiency of the asphalt smoke, more innovative designs need to be added to the existing asphalt smoke processing equipment.

Disclosure of Invention

To the problem, an object of the utility model is to provide an asphalt smoke exhaust treatment system that purification efficiency is high and the energy consumption is low.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

an asphalt smoke waste gas treatment system comprises an air exhaust fan, a spraying device, an adsorption device, a thermal desorption air inlet pipe and a combustion furnace. Spray set including spray column, absorption liquid storage tank, microbubble generator and the circulating pump that connects gradually, the air exhaust fan passes through the exhaust pipe and links to each other with the lower part of spray column, spray column bottom links to each other with the absorption liquid storage tank through absorbing the liquid pipe, be equipped with one to a plurality of shower heads in the spray column, the shower head pass through the shower with the circulating pump links to each other. Adsorption equipment include that a plurality of adsorbs the case, the bottom that adsorbs the case is equipped with intake pipe and desorption blast pipe, the top is equipped with the blast pipe, is equipped with the adsorption carrier in the adsorption case, thermal desorption intake pipe link to each other with the top that adsorbs the case. The air inlet end of the combustion furnace is connected with a desorption fan, the desorption fan is connected with a desorption exhaust pipe, the exhaust end of the combustion furnace is connected with a clean air discharge pipe, and the air inlet pipe, the exhaust pipe, the thermal desorption air inlet pipe and the desorption exhaust pipe are respectively provided with a valve.

Furthermore, a first filler area, a first spray header, a second filler area and a second spray header are sequentially arranged in the spray tower from bottom to top, PP hollow balls are respectively filled in the first filler area and the second filler area, and the first spray header and the second spray header are respectively connected with the circulating pump through a first spray pipe and a second spray pipe.

Furthermore, the combustion furnace is an RTO combustion furnace, the RTO combustion furnace comprises a combustion chamber and a plurality of regenerative chambers communicated with the combustion chamber, and a heat accumulator is arranged in each regenerative chamber. The regenerator is equipped with air inlet, gas vent and sweeps the gas entry in the one side of keeping away from the combustion chamber, the air inlet with the desorption blast pipe links to each other, the gas vent with clean air delivery pipe links to each other, every sweeps the gas entry and links to each other with the fan through sweeping the pipeline respectively, sweep and be equipped with the valve on the pipeline.

Furthermore, the adsorption carrier is an activated carbon fiber filter element.

Further, a gas concentration detector is arranged at the joint of the adsorption box and the exhaust pipe.

The utility model discloses following beneficial effect has: the utility model provides an asphalt smoke exhaust-gas treatment system adopts microbubble, absorption and burns combination technology and handles this type of organic waste gas, compares in current asphalt smoke treatment facility, the utility model discloses a technical economy is more excellent, and purification efficiency is high, and the energy consumption is low, and the desorption gas is carbon dioxide and water, does not have secondary pollution.

Drawings

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

Description of the main component symbols: 1. an air exhaust fan; 10. an exhaust gas pipe; 2. a spraying device; 201. a first shower pipe; 202. a second shower pipe; 21. a spray tower; 210. an absorption liquid pipe; 211. a first packing region; 212. a first shower head; 213. a second packing region; 214. a second shower head; 22. an absorption liquid storage tank; 23. a microbubble generator; 24. a circulation pump; 3. an adsorption device; 30. an activated carbon fiber filter element; 300. a gas concentration detector; 301. a first valve; 302. a second valve; 303. a third valve; 31. an adsorption tank; 311. an air inlet pipe; 312. desorbing the exhaust pipe; 313. an exhaust pipe; 4. a thermal desorption air inlet pipe; 41. a fourth valve; 5. an RTO burner; 50. a clean air discharge pipe; 501. purging the pipeline; 502. a fifth valve; 51. a combustion chamber; 52. a regenerator; 520. a heat accumulator; 521. an air inlet; 522. an exhaust port; 523. a purge gas inlet; 6. a fan; 7. a desorption fan.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1, an asphalt smoke waste gas treatment system comprises an air exhaust fan 1, a spraying device 2, an adsorption device 3, a thermal desorption air inlet pipe 4 and an RTO combustion furnace 5. The spraying device 2 comprises a spraying tower 21, an absorption liquid storage tank 22, a micro-bubble generator 23 and a circulating pump 24 which are connected in sequence, the air exhaust fan 1 is connected with the lower part of the spraying tower 21 through an exhaust gas pipe 10, and the bottom of the spraying tower 21 is connected with the absorption liquid storage tank 22 through an absorption liquid pipe 210. The spray tower 21 is internally provided with a first packing area 211, a first spray header 212, a second packing area 213 and a second spray header 214 from bottom to top in sequence, the first packing area 211 and the second packing area 213 are respectively filled with PP hollow spheres, and the first spray header 212 and the second spray header 214 are respectively connected with the circulating pump 24 through a first spray pipe 201 and a second spray pipe 202.

The adsorption device comprises a plurality of adsorption tanks 31 arranged in parallel, the bottom of each adsorption tank 31 is provided with an air inlet pipe 311 and a desorption exhaust pipe 312, the top of each adsorption tank 31 is provided with an exhaust pipe 313, the air inlet pipe 311 is provided with a first valve 301, the desorption exhaust pipe 312 is provided with a second valve 302, and the exhaust pipe 313 is provided with a third valve 303. The adsorption tank 31 is internally provided with an activated carbon fiber filter element 30, the joint of the top of the adsorption tank 31 and the exhaust pipe 313 is provided with a gas concentration detector 300, the thermal desorption gas inlet pipe 4 is connected with the top of the adsorption tank 31, and the joint of the thermal desorption gas inlet pipe 4 and each adsorption tank 31 is respectively provided with a fourth valve 41.

The inlet end of the RTO combustion furnace 5 is connected with the desorption exhaust pipe 312, and the exhaust end is connected with the clean air exhaust pipe 50. The RTO combustion furnace 5 includes a combustion chamber 51 and three regenerators 52 communicating with the combustion chamber 51, and a regenerator 520 is provided in the regenerator 52. The regenerator 52 is provided with an air inlet 521, an air outlet 522 and a purge gas inlet 523 on one side far away from the combustion chamber 51, the air inlet 521 is connected with the desorption fan 7, the desorption fan 7 is connected with the desorption exhaust pipe 312, the air outlet 522 is connected with the clean air exhaust pipe 50, each purge gas inlet 523 is connected with the fan 6 through a purge pipeline 501, and the connection part of the purge pipeline 501 and each regenerator 52 is provided with a fifth valve 502.

The utility model discloses a concrete working procedure as follows:

firstly, cooling and dedusting waste gas, pumping the waste gas into a spray tower 21, transferring water-soluble gas such as hydrogen sulfide and mercaptan into a liquid phase from a gas phase, oxidizing and decomposing organic waste gas molecules such as mercaptan and polycyclic aromatic hydroxyl by micro-nano bubbles and ozone, controlling the liquid-gas ratio in the spray tower 21 to be 1: 1-1.5, controlling the particle size of micro bubbles in the spray liquid to be 10-200 nm, and controlling the pH value of an absorbent to be 9-10.

And secondly, sending the demisted organic waste gas into an adsorption tank 31 through an air inlet pipe 311, adsorbing the organic waste gas on the surface of the activated carbon fiber filter element 30, purifying the waste gas, and controlling the flow rate of the waste gas in the adsorption tank 31 to be 2.0 m/s.

And thirdly, when the adsorption capacity of the activated carbon fiber filter element 30 reaches a design value, namely the gas concentration detector 300 at the top of the adsorption box 31 detects that the gas concentration exceeds the standard, closing all the first valves 301 and the third valve 303, opening the second valve 302 and the fourth valve 41, introducing hot air of 100-150 ℃ into the thermal desorption air inlet pipe 4, desorbing VOCs from the activated carbon fiber filter element 30, and desorbing and regenerating the activated carbon fiber filter element 30.

And fourthly, the desorbed gas enters the RTO combustion furnace 5 through the desorption exhaust pipe 312 to be combusted together with fuels such as natural gas and the like to generate carbon dioxide and water, the temperature in the RTO combustion furnace 5 is higher than 800 ℃, and the VOCs at a chimney detection port is 20-50 mg/m for carrying out heavy labor without peculiar smell.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an asphalt fume exhaust-gas treatment system which characterized in that: the device comprises an air exhaust fan, a spray device, an adsorption device, a thermal desorption air inlet pipe and a combustion furnace, wherein the spray device comprises a spray tower, an absorption liquid storage tank, a micro bubble generator and a circulating pump which are sequentially connected, the air exhaust fan is connected with the lower part of the spray tower through a waste gas pipe, the bottom of the spray tower is connected with the absorption liquid storage tank through an absorption liquid pipe, one or more spray heads are arranged in the spray tower and are connected with the circulating pump through spray pipes, the adsorption device comprises a plurality of adsorption boxes, the bottom of each adsorption box is provided with an air inlet pipe and a desorption exhaust pipe, the top of each adsorption box is provided with an exhaust pipe, an adsorption carrier is arranged in each adsorption box, the thermal desorption air inlet pipe is connected with the top of each adsorption box, the air inlet end of the combustion furnace is connected with the desorption fan, the desorption, the air inlet pipe, the exhaust pipe, the thermal desorption air inlet pipe and the desorption exhaust pipe are respectively provided with a valve.

2. The asphalt fume exhaust gas treatment system according to claim 1, wherein: the spray tower is internally provided with a first packing area, a first spray header, a second packing area and a second spray header in sequence from bottom to top, the first packing area and the second packing area are respectively filled with PP hollow balls, and the first spray header and the second spray header are respectively connected with the circulating pump through a first spray pipe and a second spray pipe.

3. The asphalt fume exhaust gas treatment system according to claim 1, wherein: the RTO combustion furnace comprises a combustion chamber and a plurality of heat storage chambers communicated with the combustion chamber, heat accumulators are arranged in the heat storage chambers, an air inlet, an air outlet and purging gas inlets are formed in one side, far away from the combustion chamber, of each heat storage chamber, the air inlet is connected with the desorption exhaust pipe, the air outlet is connected with the clean air exhaust pipe, each purging gas inlet is connected with the fan through a purging pipeline, and valves are arranged on the purging pipelines.

4. The asphalt fume exhaust gas treatment system according to claim 1, wherein: the adsorption carrier is an activated carbon fiber filter element.

5. The asphalt fume exhaust gas treatment system according to claim 1, wherein: and a gas concentration detector is arranged at the joint of the adsorption box and the exhaust pipe.