CN216092958U - Asphalt flue gas treatment system - Google Patents
Asphalt flue gas treatment system Download PDFInfo
- Publication number
- CN216092958U CN216092958U CN202120268456.1U CN202120268456U CN216092958U CN 216092958 U CN216092958 U CN 216092958U CN 202120268456 U CN202120268456 U CN 202120268456U CN 216092958 U CN216092958 U CN 216092958U
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- CN
- China
- Prior art keywords
- defoaming
- oil
- washing
- oil washing
- flue gas
- Prior art date
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- 239000010426 asphalt Substances 0.000 title claims abstract description 55
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000003546 flue gas Substances 0.000 title claims abstract description 44
- 238000005406 washing Methods 0.000 claims abstract description 100
- 239000007789 gas Substances 0.000 claims abstract description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000945 filler Substances 0.000 claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000012071 phase Substances 0.000 claims description 23
- 239000000779 smoke Substances 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 abstract description 8
- 239000011280 coal tar Substances 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000012855 volatile organic compound Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- -1 cyclic aromatic hydrocarbons Chemical class 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 239000003595 mist Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides an asphalt flue gas treatment system, which belongs to the technical field of deep processing of coal tar, and comprises a washing device, a defoaming device and an active carbon adsorption device, wherein the washing device comprises an oil washing groove and a Venturi jet washer, the defoaming device comprises a defoaming tower and a washing liquid groove arranged at the lower end of the defoaming tower, a gas phase inlet of the defoaming tower is connected with a gas phase outlet of the oil washing groove, defoaming fillers are arranged in the defoaming tower, and an inlet of the active carbon adsorption device is connected with a gas phase outlet of the defoaming tower. Firstly, after the oily substance is attached to the defoaming filler, a small amount of oily substance is not easy to cause the blockage of the defoaming filler, and the defoaming filler can be cleaned regularly to run stably for a long time, so that the defoaming filler is safe and stable and is convenient to maintain. Secondly, the activated carbon adsorption device is adopted to further adsorb the exhausted tail gas, so that the content of VOCs in the exhausted tail gas is reduced, secondary pollution caused by high-temperature combustion is avoided, and the energy-saving and environment-friendly effects are achieved.
Description
Technical Field
The utility model belongs to the technical field of deep processing of coal tar, and particularly relates to an asphalt flue gas treatment system.
Background
The deep processing of the coal tar refers to that the coal tar is used as a raw material, and products with higher added values, such as light oil, phenol oil, industrial naphthalene, asphalt and the like, are obtained by separation through technical processes such as fractionation and the like. When coal tar is used as a raw material for preparing asphalt, a large amount of asphalt smoke is generated in the distillation process, the asphalt smoke contains various cyclic aromatic hydrocarbons, and benzopyrene which has carcinogenic effect on human bodies exists in a large amount. The volatile matter of the asphalt smoke is discharged into the atmosphere, which can cause environmental pollution. Generally, the asphalt flue gas is treated by adopting a Venturi device and absorbing by washing oil, so that the flue gas generated by asphalt production and dissipation can be effectively captured.
For example, chinese utility model patent No. 201820173676.4 discloses an asphalt smoke tail gas safety incineration system, first mixed sprayer, second mixed sprayer, wash oil groove, cyclone, safe water seal groove and flue gas burn burning furnace. The asphalt flue gas is firstly secondarily mixed and absorbed through the first mixing ejector and the second mixing ejector, gas-liquid separation is carried out in the oil washing tank, the gas is demisted through the cyclone separator, then trace entrained fog drops are captured through the safe water seal tank, and then the gas is sent into the tail gas incinerator for safe incineration. Above-mentioned asphalt smoke tail gas safety incineration system has realized the absorption treatment and the safe burning of asphalt flue gas, but has the following two aspect's problem:
firstly, in asphalt smoke absorbed by the first mixing ejector and the second mixing ejector, entrained oily foam is easy to attach to the inner wall of the cyclone separator, so that unsmooth discharging and difficult cleaning are caused.
Secondly, the treated asphalt smoke still contains a small amount of organic components such as cyclic aromatic hydrocarbon, the ignition point of the part of substances is higher, and the part of substances are sent to a safe incineration system for incineration, so that the content of benzopyrene and nitrogen oxide in the exhaust gas is increased.
Disclosure of Invention
In view of this, the utility model provides an asphalt flue gas treatment system, which aims to solve the technical problems that in the asphalt flue gas treatment process in the prior art, a cyclone separator is easy to generate unsmooth discharging, and the content of benzopyrene and nitrogen oxides in discharged tail gas is increased.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
an asphalt flue gas treatment system comprising:
the washing device comprises an oil washing groove and a Venturi jet scrubber, the Venturi jet scrubber is arranged above the oil washing groove, a liquid phase outlet is connected with the oil washing groove, a gas phase inlet of the Venturi jet scrubber is connected with an asphalt smoke gas inlet pipe, an oil washing pump is arranged on the oil washing groove, and an outlet of the oil washing pump is connected with a liquid phase inlet of the Venturi jet scrubber;
the defoaming device comprises a defoaming tower and a washing liquid tank arranged at the lower end of the defoaming tower, a gas-phase inlet of the defoaming tower is connected with a gas-phase outlet of the washing liquid tank, and defoaming fillers are arranged in the defoaming tower; and
the inlet of the activated carbon adsorption device is connected with the gas phase outlet of the defoaming tower, and the inlet of the activated carbon adsorption device is provided with a tail gas discharge pipe.
Preferably, the defoaming filler is one of raschig rings, intalox saddles, ladder rings, pall rings or wire meshes.
Preferably, the oil washing tank comprises a first oil washing tank and a second oil washing tank, the first oil washing tank is provided with a first oil washing pump, and the second oil washing tank is provided with a second oil washing pump; the Venturi jet scrubber comprises a first scrubber and a second scrubber, wherein the first scrubber is arranged on the first oil washing groove and is connected with an outlet of the first oil washing pump; the second washer is arranged on the second oil washing groove and is connected with an outlet of the second oil washing pump; the gas phase inlet of the second scrubber is connected with the gas phase outlet of the first oil washing tank; and the gas phase outlet of the second oil washing tank is connected with the gas phase inlet of the defoaming tower.
Preferably, the outlet of the second oil washing pump is also connected with the first oil washing tank.
Preferably, in the defoaming tower, a cleaning spray is arranged above the defoaming filler, and the outlet of the first oil washing pump is further connected with the cleaning spray.
Preferably, the second oil washing groove is connected with an oil washing and supplementing pipe.
Preferably, a waste wash oil discharging pump is arranged on the wash liquid tank.
According to the technical scheme, the utility model provides an asphalt flue gas treatment system, which has the beneficial effects that: the washing device, the defoaming device and the active carbon adsorption device are sequentially connected, the asphalt smoke is firstly contacted and washed with the washing oil in the Venturi jet washer, and a large amount of cyclic aromatic hydrocarbon contained in the asphalt smoke is absorbed by the washing oil. The washed asphalt flue gas enters the defoaming device, and a small amount of oily mist carried in the flue gas is attached to the defoaming filler, so that the mist in the asphalt flue gas is reduced. And the defoamed asphalt smoke enters the activated carbon adsorption device, and is further subjected to standard emission after removing residual organic components in the asphalt smoke. Firstly, after the oily substance is attached to the defoaming filler, a small amount of oily substance is not easy to cause the blockage of the defoaming filler, and the defoaming filler can be cleaned regularly to run stably for a long time, so that the defoaming filler is safe and stable and is convenient to maintain. Secondly, the activated carbon adsorption device is adopted to further adsorb the exhausted tail gas, so that the content of VOCs in the exhausted tail gas is reduced, secondary pollution caused by high-temperature combustion is avoided, and the energy-saving and environment-friendly effects are achieved.
Drawings
FIG. 1 is a schematic flow diagram of an embodiment of a bitumen flue gas treatment system.
FIG. 2 is a schematic flow chart of the equipment of the asphalt flue gas treatment system in another embodiment.
In the figure: asphalt flue gas treatment system 10, washing device 100, oil washing tank 110, oil washing pump 1101, first oil washing tank 111, second oil washing tank 112, oil washing feed pipe 113, first oil washing pump 1111, second oil washing pump 1121, venturi jet scrubber 120, first scrubber 121, second scrubber 122, asphalt flue gas feed pipe 1201, defoaming device 200, defoaming tower 210, defoaming filler 211, cleaning spray 212, washing liquid tank 220, waste oil washing discharge pump 221, activated carbon adsorption device 300, and tail gas discharge pipe 301.
Detailed Description
The technical scheme and the technical effect of the utility model are further elaborated in the following by combining the drawings of the utility model.
Referring to fig. 1, in an embodiment, a pitch flue gas treatment system 10 for purifying pitch flue gas generated in a process of preparing pitch from coal tar includes: washing device 100, remove foam device 200 and active carbon adsorption device 300, washing device 100 includes wash tank 110 and venturi jet scrubber 120, venturi jet scrubber 120 set up in wash tank 110's top, and liquid phase exit linkage wash tank 110, venturi jet scrubber 120's gaseous phase entry linkage has pitch flue gas inlet pipe 1201, wash tank 110 is last to be provided with wash oil pump 1101, wash oil pump 1101's exit linkage venturi jet scrubber 120's liquid phase entry. The defoaming device 200 comprises a defoaming tower 210 and a washing liquid tank 220 arranged at the lower end of the defoaming tower 210, a gas-phase inlet of the defoaming tower 210 is connected with a gas-phase outlet of the oil washing tank 110, and a defoaming filler 211 is arranged in the defoaming tower 210. The inlet of the activated carbon adsorption device 300 is connected with the gas phase outlet of the defoaming tower 210, and the inlet of the activated carbon adsorption device 300 is provided with a tail gas discharge pipe 301.
For example, the defoaming filler 211 is one of raschig rings, intalox rings, ladder rings, pall rings, or wire mesh.
The asphalt flue gas is first washed in the venturi jet scrubber 120 by contacting with the wash oil, and a large amount of cyclic aromatic hydrocarbons contained in the asphalt flue gas are absorbed by the wash oil. The washed asphalt flue gas enters the defoaming device 200, and a small amount of oily mist carried in the flue gas is attached to the defoaming filler 211, so that the mist in the asphalt flue gas is reduced. The defoaming filler is intermittently washed by the washing oil, so that the blocking probability of the defoaming filler is reduced. The defoamed asphalt flue gas enters the activated carbon adsorption device 300, and after residual organic components in the asphalt flue gas are further removed, the asphalt flue gas is discharged after reaching the standard. Firstly, after the oily substance is attached to the defoaming filler, a small amount of the oily substance is not easy to cause the blockage of the defoaming filler 211, and the defoaming filler 211 can be cleaned regularly to run stably for a long time, so that the defoaming filler is safe and stable and is convenient to maintain. Secondly, adopt activated carbon adsorption device 300 to carry out further adsorption treatment to the tail gas of arranging outward, reduce the VOCs content in the tail gas of arranging outward, and can not cause secondary pollution because of high temperature burning, energy-concerving and environment-protective.
Referring to fig. 2, in order to improve the treatment efficiency of the asphalt flue gas, prolong the service life of the activated carbon adsorption device 300, and ensure that the tail gas of the asphalt flue gas reaches the standard for emission, the oil washing tank 110 includes a first oil washing tank 111 and a second oil washing tank 112, the first oil washing tank 111 is provided with a first oil washing pump 1111, and the second oil washing tank 112 is provided with a second oil washing pump 1121. The venturi jet scrubber 120 includes a first scrubber 121 and a second scrubber 122, the first scrubber 121 is disposed on the first oil washing tank 111, and is connected to the outlet of the first oil washing pump 1111. The second scrubber 122 is disposed on the second oil washing tank 112 and connected to the outlet of the second oil washing pump 1121. The gas phase inlet of the second scrubber 122 is connected to the gas phase outlet of the first oil scrubber tank 111, and the gas phase outlet of the second oil scrubber tank 112 is connected to the gas phase inlet of the demister tower 210.
The asphalt flue gas is first washed in the first scrubber 121 in contact with wash oil and gas-liquid separation is achieved in the first wash oil tank 111. The asphalt flue gas washed by the first scrubber 121 enters the second scrubber 122, contacts with wash oil and is washed, and gas-liquid separation is realized in the second wash oil tank 112. The asphalt flue gas is washed by two-stage washing oil, so that the content of cyclic aromatic hydrocarbon in the asphalt flue gas is further reduced, the risk of environmental pollution is reduced, the adsorption saturation of the activated carbon adsorption device 300 in a short period is avoided, and the consumption of activated carbon is reduced.
Further, the outlet of the second oil washing pump 1121 is also connected to the first oil washing groove 111. In this embodiment, most of the organic components in the asphalt fume are absorbed in the first scrubber 121, so after long-time operation, the wash oil in the first wash oil tank 111 is dirty, and the wash oil in the second wash oil tank 112 is clean, and at this time, the dirty wash oil in the first wash oil tank 111 is replaced with the clean wash oil in the second wash oil tank 112, so that multi-stage utilization of the wash oil is realized, the utilization efficiency of the wash oil is improved, the use amount of the wash oil is reduced, and the purification efficiency of the asphalt fume is improved.
Further, in the defoaming tower 210, a cleaning spray 212 is disposed above the defoaming filler 211, and an outlet of the first oil washing pump 1111 is further connected to the cleaning spray 212. After the system operates for a period of time, the wash oil in the first wash oil tank 111 needs to be replaced, and at this time, the wash oil to be replaced in the first wash oil tank 111 is used to flush the defoaming filler 211, so as to further improve the utilization rate of the wash oil.
In one embodiment, the second oil washing tank 112 is connected to an oil-supplementing pipe 113 for supplementing fresh oil to the second oil washing tank.
In one embodiment, the washing liquid tank 220 is provided with a waste washing oil discharging pump 221 for discharging the waste washing oil accumulated in the washing liquid tank 220.
While the utility model has been 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 utility model.
Claims (7)
1. An asphalt flue gas treatment system, comprising:
the washing device comprises an oil washing groove and a Venturi jet scrubber, the Venturi jet scrubber is arranged above the oil washing groove, a liquid phase outlet is connected with the oil washing groove, a gas phase inlet of the Venturi jet scrubber is connected with an asphalt smoke gas inlet pipe, an oil washing pump is arranged on the oil washing groove, and an outlet of the oil washing pump is connected with a liquid phase inlet of the Venturi jet scrubber;
the defoaming device comprises a defoaming tower and a washing liquid tank arranged at the lower end of the defoaming tower, a gas-phase inlet of the defoaming tower is connected with a gas-phase outlet of the washing liquid tank, and defoaming fillers are arranged in the defoaming tower; and
the inlet of the activated carbon adsorption device is connected with the gas phase outlet of the defoaming tower, and the inlet of the activated carbon adsorption device is provided with a tail gas discharge pipe.
2. The asphalt flue gas treatment system of claim 1, wherein the defoaming filler is one of raschig rings, intalox rings, ladder rings, pall rings, or wire mesh.
3. The asphalt flue gas treatment system according to claim 1, wherein the oil washing tank comprises a first oil washing tank and a second oil washing tank, a first oil washing pump is arranged on the first oil washing tank, and a second oil washing pump is arranged on the second oil washing tank; the Venturi jet scrubber comprises a first scrubber and a second scrubber, wherein the first scrubber is arranged on the first oil washing groove and is connected with an outlet of the first oil washing pump; the second washer is arranged on the second oil washing groove and is connected with an outlet of the second oil washing pump; the gas phase inlet of the second scrubber is connected with the gas phase outlet of the first oil washing tank; and the gas phase outlet of the second oil washing tank is connected with the gas phase inlet of the defoaming tower.
4. The asphalt flue gas treatment system according to claim 3, wherein the outlet of the second oil washing pump is further connected to the first oil washing tank.
5. The asphalt flue gas treatment system according to claim 4, wherein a cleaning spray is arranged in the defoaming tower above the defoaming filler, and the outlet of the first washing oil pump is further connected with the cleaning spray.
6. The asphalt flue gas treatment system according to claim 3, wherein an oil-washing replenishing pipe is connected to the second oil-washing tank.
7. The asphalt flue gas treatment system according to claim 1, wherein a waste wash oil discharge pump is arranged on the wash liquid tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120268456.1U CN216092958U (en) | 2021-01-29 | 2021-01-29 | Asphalt flue gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120268456.1U CN216092958U (en) | 2021-01-29 | 2021-01-29 | Asphalt flue gas treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216092958U true CN216092958U (en) | 2022-03-22 |
Family
ID=80686296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120268456.1U Expired - Fee Related CN216092958U (en) | 2021-01-29 | 2021-01-29 | Asphalt flue gas treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216092958U (en) |
-
2021
- 2021-01-29 CN CN202120268456.1U patent/CN216092958U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220322 |