CN220801993U - Equipment for treating 1, 3-cyclohexanedione tail gas - Google Patents
Equipment for treating 1, 3-cyclohexanedione tail gas Download PDFInfo
- Publication number
- CN220801993U CN220801993U CN202322679316.5U CN202322679316U CN220801993U CN 220801993 U CN220801993 U CN 220801993U CN 202322679316 U CN202322679316 U CN 202322679316U CN 220801993 U CN220801993 U CN 220801993U
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- Prior art keywords
- tail gas
- cyclohexanedione
- gas
- tank
- condenser
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- HJSLFCCWAKVHIW-UHFFFAOYSA-N cyclohexane-1,3-dione Chemical compound O=C1CCCC(=O)C1 HJSLFCCWAKVHIW-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000001179 sorption measurement Methods 0.000 claims abstract description 29
- 238000001704 evaporation Methods 0.000 claims abstract description 20
- 230000008020 evaporation Effects 0.000 claims abstract description 20
- 238000010257 thawing Methods 0.000 claims abstract description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract description 36
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 25
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 73
- 238000001816 cooling Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000003795 desorption Methods 0.000 description 6
- 239000002826 coolant Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- KZLGKNBPOHHGQA-UHFFFAOYSA-N cyclohexane-1,3-dione Chemical compound C1(CC(CCC1)=O)=O.C1(CC(CCC1)=O)=O KZLGKNBPOHHGQA-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides equipment for treating 1, 3-cyclohexanedione tail gas, which relates to the technical field of treatment of 1, 3-cyclohexanedione tail gas and comprises the following components: the device comprises an evaporation cooler, a buffer tank, an explosion-proof fan, a heat return exchanger, a condenser, a defrosting unit, an adsorption tank and a vacuum pump. In the utility model, acetone and methyl acrylate in the 1, 3-cyclohexanedione vacuum tail gas are condensed into liquid through a two-stage condensing device by condensing, and for environmental protection, the condensing temperature of the two-stage condenser is recommended to be selected from-70 ℃ to-20 ℃ so as to meet the environmental protection emission requirements of partial areas, acetone and methyl acrylate in the tail gas are recovered in a cryogenic mode so as to meet the emission requirements, and in order to ensure that the tail gas reaches the standard, the gas enters a matched active carbon device after passing through the two-stage condenser, the active carbon is vacuumized and regenerated through a matched vacuum pump after being adsorbed, and the gas regenerated by the active carbon enters the two-stage condenser to be condensed and then is discharged, so that the emission standard of the tail gas is met.
Description
Technical Field
The utility model relates to the technical field of 1, 3-cyclohexanedione tail gas treatment, in particular to equipment for treating 1, 3-cyclohexanedione tail gas.
Background
1, 3-Cyclohexanedione (Cyclohexane-1, 3-dione) is an organic compound, also known as cyclohexanone dione, and is commonly used as a reagent in organic synthesis, and can be used for synthesizing various organic compounds, and tail gas is generated in industrial processes such as chemical reaction of 1, 3-cyclohexanedione.
At present, low boiling point materials such as acetone, methyl acrylate and the like are used in the production process of the 1, 3-cyclohexanedione, and a vacuum pump device is used in the production process of the 1, 3-cyclohexanedione, so that non-condensable gas is generated. The main components of the noncondensable gas are substances such as acetone, methyl acrylate and nitrogen, and the like, and because the boiling points of the acetone and the methyl acrylate are low, a condensation system at the temperature of minus 15 ℃ is arranged in a production device, a certain amount of acetone and methyl acrylate (the saturated vapor pressure of the acetone at the temperature of 0 ℃ is 8-9 kpa, the saturated vapor pressure of the acetone at the temperature of 20 ℃ is 24-64 kpa, the olfactory threshold of the methyl acrylate at the temperature of 20 ℃ is 9-10 kpa) still exist in tail gas, and the olfactory threshold of the methyl acrylate is 130-250 mg/m < 3 >, so that the health of workers is protected, and in addition, the tail gas reaches the standard, a practical and effective process is needed to realize.
Disclosure of utility model
The utility model aims to solve the problems that the boiling points of acetone and methyl acrylate are low in the prior art, a production device is provided with a condensing system at the temperature of minus 15 ℃, but a certain amount of acetone and methyl acrylate still exist in tail gas and are not in the standard emission value range, and provides equipment for treating 1, 3-cyclohexanedione tail gas.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: an apparatus for treating 1, 3-cyclohexanedione tail gas comprising: the evaporator is communicated with the buffer tank through a pipeline, the buffer tank is communicated with the heat return exchanger, the explosion-proof fan is arranged on the pipeline between the buffer tank and the heat return exchanger, the heat return exchanger is respectively communicated with the condenser and the adsorption tank, and the vacuum pump is arranged on the pipeline between the heat return exchanger and the adsorption tank.
Further, the equipment for treating the tail gas of the 1, 3-cyclohexanedione is characterized in that an air inlet pipeline is communicated with the outside of the evaporative cooler.
Further, the equipment for treating the 1, 3-cyclohexanedione tail gas is characterized in that an exhaust pipeline is communicated with the outside of the adsorption tank.
Further, the device for treating the tail gas of the 1, 3-cyclohexanedione comprises two tank bodies.
Further, the equipment for treating the tail gas of the 1, 3-cyclohexanedione is characterized in that a defrosting unit is arranged outside the condenser in a matched mode.
Further, a gas-liquid separator and a cold liquid collecting tank are arranged between the heat recovery exchanger and the condenser.
Compared with the prior art, the utility model has the advantages and positive effects that,
1. In the utility model, the 1, 3-cyclohexanedione vacuum tail gas is condensed into liquid through a two-stage condensing device by condensing, and for environmental protection, the condensing temperature of the two-stage condenser is recommended to be selected from-70 ℃ to-20 ℃ so as to meet the environmental protection emission requirements of partial areas, and in order to ensure that the tail gas reaches the standard, the gas enters a matched activated carbon device after passing through the two-stage condenser, the activated carbon is vacuumized and regenerated through a matched vacuum pump after being adsorbed, and the gas regenerated by the activated carbon enters the two-stage condenser to be condensed and then emitted, so that the emission standard of the tail gas is met.
2. In the utility model, in order to effectively control energy consumption, the primary condenser exchanges heat between the tail gas of the vacuum pump and the exhaust gas after the secondary condensation, the tail gas of the vacuum pump enters the secondary condenser for deep cooling after being precooled, the exhaust gas after the condensation of the secondary condenser is discharged after the heat exchange, and the risk of directly entering air for frosting is reduced by the exhaust gas after the heat exchange.
Drawings
Fig. 1 is a flow chart of an apparatus for treating 1, 3-cyclohexanedione tail gas according to the present utility model.
Legend description: 1. an air intake line; 2. a steaming cooler; 3. a buffer tank; 4. an explosion-proof fan; 5. a heat exchanger; 6. a condenser; 61. a defrosting unit; 7. an adsorption tank; 8. a vacuum pump; 9. an exhaust line; 10. a gas-liquid separator; 11. a cold liquid collecting tank.
Detailed Description
In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.
Example as shown in fig. 1, the present utility model provides an apparatus for treating 1, 3-cyclohexanedione tail gas, comprising: the evaporation cooler 2, the buffer tank 3, the explosion-proof fan 4, the heat return exchanger 5, the condenser 6, the defrosting unit 61, the adsorption tank 7, the vacuum pump 8, the evaporation cooler 2 and the buffer tank 3 are communicated through a pipeline, the buffer tank 3 and the heat return exchanger 5 are communicated, the explosion-proof fan 4 is arranged on a pipeline between the buffer tank 3 and the heat return exchanger 5, the heat return exchanger 5 is respectively communicated with the condenser 6 and the adsorption tank 7, the vacuum pump 8 is arranged on a pipeline between the heat return exchanger 5 and the adsorption tank 7, the air inlet pipeline 1 is communicated with the outside of the evaporation cooler 2, the exhaust pipeline 9 is communicated with the outside of the adsorption tank 7, the adsorption tank 7 consists of two tank bodies, the defrosting unit 61 is arranged on the outside of the condenser 6 in a matched mode, and the gas-liquid separator 10 and the cold liquid collecting tank 11 are arranged between the heat return exchanger 5 and the condenser 6.
The whole embodiment achieves the effects that the tail gas generated in the production process of 1, 3-cyclohexanedione is sent into an air inlet pipeline 1, then the tail gas passes through an evaporation cooler 2, the evaporation coolant in the evaporation cooler 2 enters an evaporation zone through an internal spraying system in the evaporation cooler 2 and contacts with high-temperature tail gas, the heat in the evaporation coolant is absorbed, the evaporation coolant is converted into a vapor state from a liquid state at the moment, the tail gas loses heat and then is cooled to normal temperature, then the tail gas is sent into a buffer tank 3, the buffer tank is sent into a heat-return exchanger 5 in a multistage condensing unit by an anti-explosion fan 4, the heat-return exchange with the gas after the condensation treatment is carried out, the tail gas continuously enters into the condensing unit for multistage condensation, the mixed gas with a small amount of uncondensed noncondensable gas and nitrogen in a condenser 6 and the continuously entering tail gas are subjected to heat exchange and cooling, the cooling equipment adopts a Zener semi-closed reciprocating piston refrigeration principle, can keep the temperature of a cold field at-30 to-35 ℃, condenses and liquefies most of acetone and methyl acrylate in the tail gas, and returns the gas separated from liquid by condensing and liquefying most of the acetone and methyl acrylate in the tail gas to a heat exchange device for heat exchange, the temperature is raised to be close to normal temperature, so that the cold quantity recycling of a gas circuit is completed, meanwhile, the acetone and the methyl acrylate in the tail gas are subjected to deep cooling, the recovery rate can reach more than 90 percent, and in order to cope with the tail gas non-risk caused by system faults, the adsorption tank 7 consists of two tank bodies, wherein one tank body is in an adsorption working state, the other tank body is in a desorption state, when the tail gas enters the first-stage adsorption state, acetone and methyl acrylate in the tail gas are adsorbed by the activated carbon, residual organic matters in the tail gas are completely adsorbed by the activated carbon, the tail gas reaching standards is directly discharged through an exhaust pipeline 9 after passing through a carbon layer, when the adsorption carbon bed is close to a saturated state, the adsorption carbon bed is switched into a desorption state, and meanwhile, the original desorption carbon bed is completely regenerated and is switched into a gas adsorption state, so that a vacuum pump 8 is started to convey oil gas into a gas-liquid separator 10, after gas-liquid separation, the gas is discharged, a cold liquid collecting tank 11 recovers the separated liquid, energy sources are effectively saved, and in order to prevent water from being enriched and frozen in a low-temperature state, a defrosting unit 61 is arranged, namely frozen and frozen solid state is hydrated into liquid water, and the frozen solid state is discharged out of the system through the cold liquid collecting tank 11.
Working principle: the tail gas generated in the production process of 1, 3-cyclohexanedione is sent into an air inlet pipeline 1, then the tail gas passes through an evaporation cooler 2, at the moment, the evaporation coolant in the evaporation cooler 2 enters an evaporation zone through an internal spraying system in the evaporation cooler 2 and contacts with high-temperature tail gas to absorb heat in the evaporation zone, at the moment, the evaporation coolant is converted into a vapor state from a liquid state, so that the tail gas loses heat and is cooled to normal temperature, then the tail gas is sent into a buffer tank 3, is sent into a heat-return exchanger 5 in a multistage condensing unit by an anti-explosion fan 4, and is subjected to heat-return exchange with the condensed gas and then is continuously sent into the condensing unit for multistage condensation, at the moment, the mixed gas with a small amount of uncondensed non-condensable gas and nitrogen in the condenser 6 and the continuously-entered tail gas are subjected to heat exchange cooling, so that the newly-entered tail gas is cooled to 0-5 ℃, thereby improving the refrigeration efficiency, reasonably utilizing energy sources to realize the effect of energy conservation, the cooling equipment adopts the principle of Zener semi-closed reciprocating piston type refrigeration, can keep the temperature of a cold field at minus 30 to minus 35 ℃, condenses and liquefies most of acetone and methyl acrylate in tail gas, so that most of the acetone and methyl acrylate in the tail gas are condensed and liquefied to separate out liquid, and then the gas after separating out the liquid is returned to a heat exchange exchanger for heat exchange, the temperature is risen to be close to normal temperature, so that the cold recycling of a gas path is completed, meanwhile, the recovery rate of the acetone and the methyl acrylate in the tail gas can reach more than 90 percent through deep cooling, in order to cope with the failure risk of the tail gas not reaching standards caused by system faults, the adsorption tank 7 is composed of two tanks, one tank is in an adsorption working state, the other tank is in a desorption state, when the tail gas enters the primary adsorption, acetone and methyl acrylate in the tail gas are adsorbed by the activated carbon, the residual organic matters in the tail gas are completely adsorbed by the activated carbon, the tail gas reaching the standard is directly discharged through an exhaust pipeline 9 after passing through a carbon layer, when the adsorption carbon bed is close to a saturated state, the adsorption carbon bed is switched into a desorption state, and meanwhile, the original desorption carbon bed is completely regenerated and is switched into a gas adsorption state, so that a vacuum pump 8 is started to convey oil gas into a gas-liquid separator 10, after gas-liquid separation, the gas is discharged, a cold liquid collecting tank 11 is used for recovering the separated liquid, the energy is effectively saved, and in order to prevent the water from being enriched and frozen in a low-temperature state, a defrosting unit 61 is arranged, the frozen solid is hydrated into liquid water, and the liquid water is discharged out of the system through the cold liquid collecting tank 11.
The wiring diagrams of the evaporative cooler 2, the buffer tank 3, the explosion-proof fan 4, the heat-return exchanger 5, the condenser 6, the defrosting unit 61, the adsorption tank 7, the vacuum pump 8, the gas-liquid separator 10 and the cold liquid collecting tank 11 in the utility model belong to common general knowledge in the field, the working principle is a known technology, and the model of the wiring diagrams is selected to be suitable according to actual use, so that the control mode and wiring arrangement of the evaporative cooler 2, the buffer tank 3, the explosion-proof fan 4, the heat-return exchanger 5, the condenser 6, the defrosting unit 61, the adsorption tank 7, the vacuum pump 8, the gas-liquid separator 10 and the cold liquid collecting tank 11 are not explained in detail.
The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.
Claims (6)
1. An apparatus for treating 1, 3-cyclohexanedione exhaust gas comprising: evaporation cooler (2), buffer tank (3), explosion-proof fan (4), heat exchanger (5) return, condenser (6), defrosting unit (61), adsorption tank (7), vacuum pump (8), evaporation cooler (2) and buffer tank (3) are through pipeline intercommunication, buffer tank (3) are linked together with heat exchanger (5) return, explosion-proof fan (4) set up on the pipeline between buffer tank (3) and heat exchanger (5) return, heat exchanger (5) are linked together with condenser (6) and adsorption tank (7) respectively, vacuum pump (8) set up on the pipeline between heat exchanger (5) return and adsorption tank (7) return.
2. The apparatus for treating 1, 3-cyclohexanedione tail gas according to claim 1, characterized in that: an air inlet pipeline (1) is communicated with the outside of the evaporative cooler (2).
3. The apparatus for treating 1, 3-cyclohexanedione tail gas according to claim 1, characterized in that: an exhaust pipeline (9) is communicated with the outside of the adsorption tank (7).
4. The apparatus for treating 1, 3-cyclohexanedione tail gas according to claim 1, characterized in that: the adsorption tank (7) consists of two tank bodies.
5. The apparatus for treating 1, 3-cyclohexanedione tail gas according to claim 1, characterized in that: the outside of the condenser (6) is provided with a defrosting unit (61) in a matched mode.
6. The apparatus for treating 1, 3-cyclohexanedione tail gas according to claim 1, characterized in that: a gas-liquid separator (10) and a cold liquid collecting tank (11) are arranged between the heat return exchanger (5) and the condenser (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322679316.5U CN220801993U (en) | 2023-10-08 | 2023-10-08 | Equipment for treating 1, 3-cyclohexanedione tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322679316.5U CN220801993U (en) | 2023-10-08 | 2023-10-08 | Equipment for treating 1, 3-cyclohexanedione tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220801993U true CN220801993U (en) | 2024-04-19 |
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ID=90713409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322679316.5U Active CN220801993U (en) | 2023-10-08 | 2023-10-08 | Equipment for treating 1, 3-cyclohexanedione tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220801993U (en) |
-
2023
- 2023-10-08 CN CN202322679316.5U patent/CN220801993U/en active Active
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