CN212731525U - Asphalt flue gas cleaning device - Google Patents
Asphalt flue gas cleaning device Download PDFInfo
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- CN212731525U CN212731525U CN202022008362.9U CN202022008362U CN212731525U CN 212731525 U CN212731525 U CN 212731525U CN 202022008362 U CN202022008362 U CN 202022008362U CN 212731525 U CN212731525 U CN 212731525U
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- washing liquid
- flue gas
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Abstract
The utility model relates to a coking tail gas treatment technical field especially relates to a pitch flue gas cleaning device. Comprises a body, a washing liquid spraying pipe, an atomizing spray head, a large-caliber spray head, a circulating pump and a demisting device; the top of the body is provided with a tail gas inlet and a purified gas outlet, one side of the bottom of the body is provided with a supplementary washing liquid inlet, a washing liquid outlet is arranged above the supplementary washing liquid inlet, and the other side of the bottom of the body is provided with a high-concentration washing liquid outlet; the washing liquid outlet is connected with a circulating pump, the circulating pump is connected with a washing liquid spraying pipe, the washing liquid spraying pipe is connected with an atomizing nozzle and a large-diameter nozzle, the atomizing nozzle and the large-diameter nozzle are positioned in the body, the spraying direction of the atomizing nozzle is vertically downward, the large-diameter nozzle is positioned below the tail gas inlet, and the spraying direction of the large-diameter nozzle is vertically upward; the defogging device is fixedly connected in the body and is positioned above the atomizing nozzle. Impurities in asphalt smoke generated by processing tar are washed, the washing liquid can be recycled, and the gas after washing can be effectively utilized.
Description
Technical Field
The utility model relates to a coking tail gas treatment technical field especially relates to a pitch flue gas cleaning device.
Background
The components of the asphalt smoke generated by processing the tar are complex, the components of the asphalt smoke are similar to those of the asphalt, and the asphalt smoke mainly comprises low-carbon hydrocarbon, polycyclic aromatic hydrocarbon, nitrogen and sulfur heterocyclic compounds and the like. The asphalt smoke consists of gas phase and liquid phase, the liquid phase part is fine volatile condensate with the particle size of 0.1-1.0 mu m, the gas phase is a mixture of different gases, and the apparent form is very dispersed smoke with low concentration. In order to effectively treat and control the pollution of asphalt smoke, the emission standard of atmospheric pollutants has clear text regulation on the emission of industrial asphalt smoke, and the maximum allowable emission concentration of the asphalt smoke is 40mg/m for a newly-built tar processing plant3The highest allowable emission concentration of benzo (a) pyrene is 0.3x10-3mg/m3. Therefore, how to effectively treat the asphalt smoke to reach the national emission standard becomes a problem which must be solved by the tar processing industry.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a cleaning device for asphalt smoke. Treating asphalt smoke generated by tar processing, and washing impurities in the asphalt smoke; the cleaning solution can be recycled, and the cleaned gas can be effectively utilized.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an asphalt flue gas cleaning device comprises a body, a cleaning solution spraying pipe, an atomizing spray head, a large-diameter spray head, a circulating pump and a demisting device; the top of the body is provided with a tail gas inlet and a purified gas outlet, one side of the bottom of the body is provided with a supplementary washing liquid inlet, a washing liquid outlet is arranged above the supplementary washing liquid inlet, and the other side of the bottom of the body is provided with a high-concentration washing liquid outlet; the washing liquid outlet is connected with a circulating pump, the circulating pump is connected with a washing liquid spraying pipe, the washing liquid spraying pipe is connected with an atomizing nozzle and a large-diameter nozzle, the atomizing nozzle and the large-diameter nozzle are positioned in the body, the spraying direction of the atomizing nozzle is vertically downward, the large-diameter nozzle is positioned below the tail gas inlet, and the spraying direction of the large-diameter nozzle is vertically upward; the defogging device is fixedly connected in the body and is positioned above the atomizing nozzle.
The body also comprises an end socket, a cylinder body, a bottom plate, a middle partition plate and a bottom partition plate; the cylinder is fixedly connected to the bottom plate, the end enclosure is fixedly connected to the cylinder, the tail gas inlet and the purified gas outlet are fixedly connected to the end enclosure, the middle partition plate is fixedly connected to the inner wall of the cylinder, and the bottom partition plate is fixedly connected to the bottom plate.
The barrel is circular barrel, and a plurality of atomizer along barrel circumference equipartition.
The demisting device comprises a mesh demister and a baffle demister, the mesh demister is fixedly connected in the cylinder, and the baffle demister is fixedly connected in the end socket and is positioned below the purified gas outlet.
The pipe diameter of the large-caliber spray head is more than DN 20.
The supplementary washing liquid inlet is connected with the tar processing system through a pipeline, and the supplementary washing liquid adopts washing oil.
And the purified gas outlet is connected with the asphalt reaction kettle heating furnace through a pipeline.
And the high-concentration washing liquid outlet is connected with the tar processing unit through a pipeline.
A method for cleaning asphalt flue gas specifically comprises the following steps:
1) opening a valve at an inlet for replenishing the washing liquid, introducing the washing liquid into the left side of the bottom partition plate, starting a circulating pump when the circulating amount is reached, wherein the whole system comprises a large-caliber spray head and an atomizing spray head, and the washing liquid starts to circulate;
2) after the asphalt flue gas enters the first washing section through the tail gas inlet, the asphalt flue gas and the large-caliber spray head washing liquid form gas-liquid two-phase counter-current collision, and when the momentum of the gas-liquid two phases reaches balance, a foam area with gas-liquid two phases in close contact is generated, wherein the foam area is a strong turbulent motion area;
3) the washing liquid enters the right space of the bottom partition plate, automatically flows into the left space after filling the right space of the bottom partition plate, the washing liquid of solid particles and high-concentration corrosive media is separated from the right space, and the washing liquid enters the tar processing unit from a high-concentration washing liquid outlet;
4) the asphalt flue gas upwards enters a second washing section and then reversely contacts with the atomizing spray head, corrosive media in the asphalt flue gas are fully removed, liquid carried in the gas is removed through a wire mesh demisting device, and the liquid carried in the gas is further removed through a baffle plate demister;
5) and the cleaned gas is sent to a modified asphalt reaction kettle heating furnace through a purified gas outlet for combustion.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the tail gas and the washing liquid in the first washing section form gas-liquid two-phase counter-current collision, when the momentum of the gas-liquid two phases reaches balance, a foam area in which the gas-liquid two phases are in close contact is generated, the foam area is a strong turbulent area, the specific surface area of the liquid is large, the liquid is rapidly updated, and the washing efficiency is high.
2) The large-caliber spray head can allow the circulating liquid to have higher solid content, is anti-blocking and high in reliability, and reduces the maintenance and overhaul.
3) The second washing section adopts an atomizing spray head to spray washing liquid, and further fully removes media;
4) and a demisting device is added to prevent impurities from entering the flue gas system.
5) The cleaned flue gas enters a heating furnace of the modified asphalt reaction kettle to be combusted, and is not discharged outwards.
Drawings
Fig. 1 is a schematic structure and a schematic process diagram of the present invention.
In the figure: 1-end enclosure 2-cylinder 3-bottom plate 4-supplementary washing liquid inlet 5-washing liquid outlet 6-high-concentration washing liquid outlet 7-middle partition plate 8-top partition plate 9-tail gas inlet 10-washing liquid spray pipe 11-large-caliber spray head 12-atomizing spray head 13-wire demister 14-baffle plate demister 15-circulating pump 16-purified gas outlet 17-bottom partition plate
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
example (b):
as shown in figure 1, the asphalt flue gas cleaning device comprises a body, a cleaning solution spraying pipe 10, an atomizing nozzle 12, a large-diameter nozzle 11, a circulating pump 15 and a demisting device.
The body comprises a seal head 1, a cylinder 2, a bottom plate 3, a middle partition plate 7 and a bottom partition plate 17. The cylinder 2 is fixedly connected on the bottom plate 3, the end socket 1 is fixedly connected on the cylinder 2, the tail gas inlet 9 and the purified gas outlet 16 are fixedly connected on the end socket 2, the tail gas inlet 9 extends into the cylinder 2 and extends into the middle of the cylinder 2, the middle partition plate 7 is fixedly connected on the inner wall of the cylinder 2, and the bottom partition plate 17 is fixedly connected on the bottom plate 3.
Barrel 2 is circular barrel, and 2 bottom left sides of barrel are equipped with and supply washing liquid entry 4, supply washing liquid entry 4 top and be equipped with washing liquid export 5, and 2 bottom right sides of barrel are equipped with high concentration washing liquid export 6. The supplementary washing liquid inlet 4 is connected with a tar processing system through a pipeline, and the supplementary washing liquid adopts washing oil. The purified gas outlet 16 is connected with the asphalt reaction kettle heating furnace through a pipeline. The high-concentration washing liquid outlet 6 is connected with the tar processing unit through a pipeline.
Washing liquid export 5 links to each other with circulating pump 15, circulating pump 15 links to each other with washing liquid spray line 10, washing liquid spray line 10 and atomizer 12, heavy-calibre shower nozzle 11 links to each other, atomizer 12, heavy-calibre shower nozzle 11 are located barrel 2, a plurality of atomizer 12 are along barrel circumference equipartition, atomizer 12 sprays the direction perpendicularly downwards, heavy-calibre shower nozzle 11 is located tail gas entry 9 below, heavy-calibre shower nozzle 9 sprays the direction perpendicularly upwards, the pipe diameter of heavy-calibre shower nozzle is more than DN 20.
The demisting device comprises a mesh demister 13 and a baffle demister 14, wherein the mesh demister 13 is fixedly connected in the cylinder 2 and is positioned above the atomizing nozzle 12. The baffle plate demister 14 is fixedly connected in the end socket 1 and positioned below the purified gas outlet 16, the top partition plate 8 is fixedly connected in the end socket 1, and the top partition plate 8 is connected with the baffle plate demister 14.
A method for cleaning asphalt flue gas specifically comprises the following steps:
1) and opening a valve at a supplementary washing liquid inlet 4, introducing washing liquid into the left side of the bottom partition plate 17, starting the circulating pump 10 when the circulating flow is reached, wherein the whole system comprises a large-caliber spray head 11 and an atomizing spray head 12, and the circulation of the washing liquid is started.
2) After the asphalt flue gas enters the first washing section through the tail gas inlet 9, the asphalt flue gas and the washing liquid of the large-caliber spray head 11 form gas-liquid two-phase counter-current collision, and when the momentum of the gas-liquid two phases reaches balance, a foam area in which the gas-liquid two phases are in close contact is generated, wherein the foam area is a strong turbulent motion area; the liquid has large specific surface area and is updated rapidly, the temperature of the tail gas is effectively reduced, and the washing efficiency is high.
3) The washing liquid gets into bottom baffle 17 right side space, flows into left side space after being full of bottom baffle 17 right side space, and solid particle and the washing liquid of high concentration corrosive medium are separated out to the right side space, and the washing liquid gets into tar processing unit by high concentration washing liquid export 6.
4) The asphalt flue gas upwards enters a second washing section and then reversely contacts with the atomizing spray head 12, corrosive media in the asphalt flue gas are fully removed, liquid carried in the gas is removed through the wire mesh defogging device 13, and the liquid carried in the gas is further removed through the baffle plate defogger 14; the reduction of media in the flue gas is ensured, and the gas after subsequent cleaning is ensured to be conveyed to a heating furnace of a modified asphalt reaction kettle for stable combustion.
5) The cleaned gas is sent to a modified asphalt reaction kettle heating furnace through a purified gas outlet 16 for combustion.
The utility model discloses tail gas and washing liquid form the double-phase countercurrent of gas-liquid and bump in the first washing section, when the double-phase momentum of gas-liquid reaches balance, produce the foam district of the double-phase intimate contact of gas-liquid, and this district is a strong turbulence region, and liquid specific surface area is big and update rapidly, and the washing efficiency is high. The large-caliber spray head 11 can allow the circulating liquid to have higher solid content, is anti-blocking and high in reliability, and reduces the maintenance and overhaul. In the second washing section, an atomizing spray head 12 is adopted to spray washing liquid, so that the medium is further fully removed; and a demisting device is added to prevent impurities from entering the flue gas system. The cleaned flue gas enters a heating furnace of the modified asphalt reaction kettle to be combusted, and is not discharged outwards.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a clean device of pitch flue gas which characterized in that: comprises a body, a washing liquid spraying pipe, an atomizing spray head, a large-caliber spray head, a circulating pump and a demisting device; the top of the body is provided with a tail gas inlet and a purified gas outlet, one side of the bottom of the body is provided with a supplementary washing liquid inlet, a washing liquid outlet is arranged above the supplementary washing liquid inlet, and the other side of the bottom of the body is provided with a high-concentration washing liquid outlet; the washing liquid outlet is connected with a circulating pump, the circulating pump is connected with a washing liquid spraying pipe, the washing liquid spraying pipe is connected with an atomizing nozzle and a large-diameter nozzle, the atomizing nozzle and the large-diameter nozzle are positioned in the body, the spraying direction of the atomizing nozzle is vertically downward, the large-diameter nozzle is positioned below the tail gas inlet, and the spraying direction of the large-diameter nozzle is vertically upward; the defogging device is fixedly connected in the body and is positioned above the atomizing nozzle.
2. The asphalt flue gas cleaning device according to claim 1, wherein: the body also comprises an end socket, a cylinder body, a bottom plate, a middle partition plate and a bottom partition plate; the cylinder is fixedly connected to the bottom plate, the end enclosure is fixedly connected to the cylinder, the tail gas inlet and the purified gas outlet are fixedly connected to the end enclosure, the middle partition plate is fixedly connected to the inner wall of the cylinder, and the bottom partition plate is fixedly connected to the bottom plate.
3. The asphalt flue gas cleaning device according to claim 2, characterized in that: the barrel is circular barrel, and a plurality of atomizer along barrel circumference equipartition.
4. The asphalt flue gas cleaning device according to claim 2, characterized in that: the demisting device comprises a mesh demister and a baffle demister, the mesh demister is fixedly connected in the cylinder, and the baffle demister is fixedly connected in the end socket and is positioned below the purified gas outlet.
5. The asphalt flue gas cleaning device according to claim 1, wherein: the pipe diameter of the large-caliber spray head is more than DN 20.
6. The asphalt flue gas cleaning device according to claim 1, wherein: the supplementary washing liquid inlet is connected with the tar processing system through a pipeline, and the supplementary washing liquid adopts washing oil.
7. The asphalt flue gas cleaning device according to claim 1, wherein: and the purified gas outlet is connected with the asphalt reaction kettle heating furnace through a pipeline.
8. The asphalt flue gas cleaning device according to claim 1, wherein: and the high-concentration washing liquid outlet is connected with the tar processing unit through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022008362.9U CN212731525U (en) | 2020-09-15 | 2020-09-15 | Asphalt flue gas cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022008362.9U CN212731525U (en) | 2020-09-15 | 2020-09-15 | Asphalt flue gas cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212731525U true CN212731525U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022008362.9U Active CN212731525U (en) | 2020-09-15 | 2020-09-15 | Asphalt flue gas cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212731525U (en) |
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2020
- 2020-09-15 CN CN202022008362.9U patent/CN212731525U/en active Active
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