CN215962918U - Low-temperature efficient treatment system for waste gas of cracking furnace - Google Patents
Low-temperature efficient treatment system for waste gas of cracking furnace Download PDFInfo
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- CN215962918U CN215962918U CN202122582895.2U CN202122582895U CN215962918U CN 215962918 U CN215962918 U CN 215962918U CN 202122582895 U CN202122582895 U CN 202122582895U CN 215962918 U CN215962918 U CN 215962918U
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Abstract
The utility model discloses a low-temperature high-efficiency treatment system for waste gas of a cracking furnace, which is characterized in that gas is subjected to primary solid impurity filtration through a cyclone mixing sprayer, after filtration is finished, acid substances and volatile organic compounds in the waste gas are subjected to two-stage oxidation absorption in a chemical washing mode through two chemical towers, a nitrogen denitration module is arranged between the two-stage absorption, the nitrogen denitration module can thoroughly absorb NOx in the waste gas, and the absorption mode is hidden, low in cost and high in efficiency; and removing particulate impurities in the air flow through a wet electric precipitator, then performing deodorization operation through a high-efficiency activated carbon tower, and finally releasing the obtained clean gas into the atmosphere.
Description
Technical Field
The utility model belongs to the technical field of waste gas treatment equipment, and particularly relates to a low-temperature efficient treatment system for waste gas of a cracking furnace.
Background
In the present thermal cracking furnace exhaust-gas treatment process, it realizes one-to-one exhaust-gas treatment through solitary gaseous processing module, and exhaust-gas treatment result is difficult up to standard under the comprehensive condition, and the system is unstable moreover, and it is higher to drop into the operation maintenance cost.
Moreover, the traditional SNCR denitration temperature is 850-. When denitration treatment is carried out, the treatment of oil in waste gas is unreasonable, and continuous and stable operation cannot be realized.
In view of the drawbacks of the prior art, it is very necessary for those skilled in the art to design an exhaust gas treatment device, which can improve the comprehensive treatment efficiency of exhaust gas from dust to harmful substances and the terminal emission quality.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a low-temperature high-efficiency treatment system for waste gas of a cracking furnace, which has the advantages of reasonable structure, reasonable process matching, reasonable denitration efficiency theoretical value of 99%, more scientific treatment on oil in the waste gas, less operation of people in the operation of the system, lower investment, operation and maintenance cost, stable system and convenient management.
In order to achieve the technical purpose, the utility model adopts the following scheme: a low-temperature high-efficiency treatment system for waste gas of a cracking furnace comprises a cyclone mixing spray thrower, at least two chemical towers, a nitrogen denitration module, an electrostatic dust collector, a high-efficiency activated carbon tower, a fan and a chimney; the device comprises a cyclone mixing sprayer, a primary chemical tower, a secondary chemical tower, a nitrogen denitration module, an electrostatic dust collector, a high-efficiency active carbon tower, a fan, a chimney and a chimney, wherein the cyclone mixing sprayer is directly connected with an air source through a pipeline, the rear side of the cyclone mixing sprayer is connected with the primary chemical tower, the rear side of the primary chemical tower is connected with the secondary chemical tower through a pipeline, the pipeline connecting the primary chemical tower and the secondary chemical tower is provided with the nitrogen denitration module to realize denitration in the pipeline, the rear side of the secondary chemical tower is the electrostatic dust collector, and the rear side of the electrostatic dust collector is connected with the high-efficiency active carbon tower and then is connected with the fan and the chimney to realize the discharge of purified air; the nitrogen denitration module is internally provided with a spraying device, and the spraying denitration treatment of the gas in the pipeline is realized through the spraying device.
The electrostatic dust collector is a wet electrostatic dust collector.
The nitrogen denitration module is connected with a liquid supply module arranged on the ground surface, and the liquid supply module at least comprises a liquid storage tank and a control cabinet provided with a high-pressure liquid supply device.
The nitrogen denitration module comprises a cylinder body, wherein connecting flanges are arranged at two ends of the cylinder body, a liquid supply pipe is arranged in the cylinder body, a liquid supply bin is arranged on the liquid supply pipe, an outer liquid supply pipe and an inner liquid supply pipe are connected to the liquid supply bin, a plurality of spray heads are arranged on the outer liquid supply pipe and the inner liquid supply pipe, and at least one central liquid supply spray head is arranged at the center of the inner liquid supply pipe; the inner liquid supply pipe and the outer liquid supply pipe are all arranged in an annular mode, and the outer liquid supply pipe is arranged close to the inner wall of the pipeline.
The spray head on the inner liquid supply pipe and the spray head on the outer liquid supply pipe are oppositely arranged.
The liquid supply bin is internally provided with a conical cap which is connected with the tail end of the liquid supply pipe, the conical cap is gradually increased towards the liquid spraying direction, and the conical cap is provided with a plurality of through holes.
The utility model has the beneficial effects that: according to the design, the gas is subjected to primary solid impurity filtration through the cyclone mixed-motion sprayer, after filtration is finished, two-stage oxidation absorption of acid substances (hydrogen sulfide and SO 2) and volatile organic compounds (non-methane total hydrocarbons) in the waste gas is realized through two chemical towers in a chemical washing mode, a nitrogen denitration module is arranged between the two-stage absorption, the nitrogen denitration module can thoroughly absorb NOx in the waste gas, and the absorption mode is hidden, low in cost and high in efficiency; and removing particulate impurities in the air flow through a wet electric precipitator, then performing deodorization operation through a high-efficiency activated carbon tower, and finally releasing the obtained clean gas into the atmosphere.
The above exhaust gas purification system structural design reasonable, with present various functional module integration, improve it simultaneously, can realize gaseous big impurity and clear away, through chemical tower dehumidification and desulfurization, nitrogen oxide in the denitration device gets rid of waste gas again, through secondary chemical tower desulfurization and denitration, mix through the wet-type again and move the spray column and deoil, remove dust and remove the smell, get rid of VOCs gas through the active carbon case at last, make the gas of emission up to standard.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic diagram I of the internal structure of the nitrogen denitration module according to the present invention;
FIG. 4 is a schematic diagram II of the internal structure of the nitrogen denitration module according to the present invention;
in the attached drawing, 1, a cyclone mixed-action sprayer, 2, a first-stage chemical tower, 3, a liquid supply module, 31, a liquid storage tank, 32, a control cabinet, 4, a nitrogen denitration module, 41, a liquid supply pipe, 42, an elbow, 43, a liquid supply bin, 44, a cone cap, 45, a through hole, 46, an outer liquid supply pipe, 47, an inner liquid supply pipe, 48, an outer high-pressure spray head, 49, an inner high-pressure spray head, 50, a central liquid supply spray head, 5, a second-stage chemical tower, 6, an electrostatic dust collector, 7, a high-efficiency active carbon tower, 8, a variable frequency fan, 9 and a chimney.
Detailed Description
Referring to the attached drawings, the low-temperature high-efficiency treatment system for the waste gas of the cracking furnace comprises a cyclone mixing sprayer 1 connected with a gas source, wherein the rear side of the cyclone mixing sprayer 1 is connected with a primary chemical tower 2, and primary oxidation and absorption of acid substances (hydrogen sulfide and SO 2) and volatile organic compounds (non-methane total hydrocarbons) in the waste gas are realized by the primary chemical tower 2 in a chemical washing mode; treat that the absorption finishes the back, realize hydrogen sulfide, SO2 and volatile organic compounds (the total hydrocarbon of non-methane)'s secondary absorption through one-level chemical tower 5, twice absorption can effectual improvement absorption efficiency, moreover, be provided with between one-level chemical tower 2 and second grade chemical tower 5 and supply liquid module 3, supply liquid module setting at the earth's surface and connect through pipeline and nitrogen denitration module 4, supply liquid module 3 include that two reservoir realize the mixture of washing liquid, still be provided with switch board 32 that has high pressure and supply liquid device, realize supplying liquid to the pipeline through this kind of structure and carry out thorough absorption to NOx in the waste gas, this kind of absorption mode is hidden, and is with low costs, efficient.
In order to improve the thorough absorption of NOx in the exhaust gas, the utility model discloses a structure of a nitrogen denitration module 4, as shown in fig. 3 and 4, the nitrogen denitration module 4 comprises a cylinder body with connecting flanges at two ends, a liquid supply pipe 41 is arranged inside the cylinder body, a liquid supply bin 43 is arranged on the liquid supply pipe 41, an outer liquid supply pipe 46 and an inner liquid supply pipe 47 are connected to the liquid supply bin 43, the inner liquid supply pipe 47 and the outer liquid supply pipe 46 are both arranged in a ring shape, and the outer liquid supply pipe 46 is arranged to be tightly attached to the inner wall of the pipe; the outer liquid supply pipe 46 and the inner liquid supply pipe 47 are both provided with an outer high-pressure spray nozzle 48 and an inner high-pressure spray nozzle 49, the outer high-pressure spray nozzle 48 and the inner high-pressure spray nozzle 49 are arranged oppositely, large-area airflow spraying coverage can be achieved, and further, at least one central liquid supply spray nozzle 50 is arranged in the center of the inner liquid supply pipe 47, and central area spraying can be achieved.
Furthermore, the device can realize the spraying of the absorption liquid without dead angles in the pipeline, but the liquid used for realizing the absorption of NOx is easy to crystallize to cause the pipeline blockage, in order to avoid the generation of the above problems, a cone cap 44 and the end connection of the elbow 42 on the liquid supply pipe 41 are arranged in the liquid supply bin 43, the cone cap 44 is gradually increased towards the liquid spraying direction, a plurality of through holes 43 are arranged on the cone cap 44, and through the structural arrangement, the collision and the shunting of the high-pressure liquid during the supply can be realized, and the liquid drops are effectively prevented from being condensed to cause crystallization.
A wet electrostatic dust collector is arranged at the rear side of the secondary chemical tower 5, and the removal of particulate impurities in the air flow is realized through the wet electrostatic dust collector; the rear side of the wet electrostatic precipitator is provided with a high-efficiency active carbon tower, and the high-efficiency active carbon tower can adsorb organic waste gas, such as non-methane total hydrocarbon and NOx, in the air and remove odor. The tail gas of terminal purification passes through frequency conversion fan 8 and chimney 9 cooperation and realizes the external row of up to standard gas.
To summarize: the waste gas purification system provided by the utility model is reasonable in structural design, integrates various current functional modules, improves the functional modules, can realize the removal of large gas impurities, reduces humidity and desulfurizes through the chemical tower, removes nitrogen oxides in waste gas through denitration equipment, desulfurizes and denitrates through the secondary chemical tower, removes oil, dust and odor through the wet mixed-action spray tower, and finally removes VOCs gas through the activated carbon box, so that the discharged gas reaches the standard.
Claims (6)
1. The utility model provides a pyrolysis furnace waste gas low temperature high efficiency processing system which characterized in that: the device comprises a cyclone mixed-action sprayer, at least two chemical towers, a nitrogen denitration module, an electrostatic dust collector, a high-efficiency activated carbon tower, a fan and a chimney; the device comprises a cyclone mixing sprayer, a primary chemical tower, a secondary chemical tower, a nitrogen denitration module, an electrostatic dust collector, a high-efficiency active carbon tower, a fan, a chimney and a chimney, wherein the cyclone mixing sprayer is directly connected with an air source through a pipeline, the rear side of the cyclone mixing sprayer is connected with the primary chemical tower, the rear side of the primary chemical tower is connected with the secondary chemical tower through a pipeline, the pipeline connecting the primary chemical tower and the secondary chemical tower is provided with the nitrogen denitration module to realize denitration in the pipeline, the rear side of the secondary chemical tower is the electrostatic dust collector, and the rear side of the electrostatic dust collector is connected with the high-efficiency active carbon tower and then is connected with the fan and the chimney to realize the discharge of purified air; the nitrogen denitration module is internally provided with a spraying device, and the spraying denitration treatment of the gas in the pipeline is realized through the spraying device.
2. The low-temperature high-efficiency treatment system for the waste gas of the cracking furnace as claimed in claim 1, characterized in that: the electrostatic dust collector is a wet electrostatic dust collector.
3. The low-temperature high-efficiency treatment system for the waste gas of the cracking furnace as claimed in claim 1, characterized in that: the nitrogen denitration module is connected with a liquid supply module arranged on the ground surface, and the liquid supply module at least comprises a liquid storage tank and a control cabinet provided with a high-pressure liquid supply device.
4. The low-temperature high-efficiency treatment system for the waste gas of the cracking furnace as claimed in claim 3, characterized in that: the nitrogen denitration module comprises a cylinder body, wherein connecting flanges are arranged at two ends of the cylinder body, a liquid supply pipe is arranged in the cylinder body, a liquid supply bin is arranged on the liquid supply pipe, an outer liquid supply pipe and an inner liquid supply pipe are connected to the liquid supply bin, a plurality of spray heads are arranged on the outer liquid supply pipe and the inner liquid supply pipe, and at least one central liquid supply spray head is arranged at the center of the inner liquid supply pipe; the inner liquid supply pipe and the outer liquid supply pipe are all arranged in an annular mode, and the outer liquid supply pipe is arranged close to the inner wall of the pipeline.
5. The low-temperature high-efficiency treatment system for the waste gas of the cracking furnace as claimed in claim 4, wherein: the spray head on the inner liquid supply pipe and the spray head on the outer liquid supply pipe are oppositely arranged.
6. The low-temperature high-efficiency treatment system for the waste gas of the cracking furnace as claimed in claim 4, wherein: the liquid supply bin is internally provided with a conical cap which is connected with the tail end of the liquid supply pipe, the conical cap is gradually increased towards the liquid spraying direction, and the conical cap is provided with a plurality of through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122582895.2U CN215962918U (en) | 2021-10-26 | 2021-10-26 | Low-temperature efficient treatment system for waste gas of cracking furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122582895.2U CN215962918U (en) | 2021-10-26 | 2021-10-26 | Low-temperature efficient treatment system for waste gas of cracking furnace |
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| Publication Number | Publication Date |
|---|---|
| CN215962918U true CN215962918U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122582895.2U Active CN215962918U (en) | 2021-10-26 | 2021-10-26 | Low-temperature efficient treatment system for waste gas of cracking furnace |
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| CN (1) | CN215962918U (en) |
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2021
- 2021-10-26 CN CN202122582895.2U patent/CN215962918U/en active Active
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