CN110420534A - A kind of carbon disulfide exhaust gas recovery system and method - Google Patents
A kind of carbon disulfide exhaust gas recovery system and method Download PDFInfo
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- CN110420534A CN110420534A CN201910761084.3A CN201910761084A CN110420534A CN 110420534 A CN110420534 A CN 110420534A CN 201910761084 A CN201910761084 A CN 201910761084A CN 110420534 A CN110420534 A CN 110420534A
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- liquid nitrogen
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- exhaust gas
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- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 254
- 239000007788 liquid Substances 0.000 claims abstract description 143
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 127
- 238000009833 condensation Methods 0.000 claims abstract description 86
- 230000005494 condensation Effects 0.000 claims abstract description 86
- 239000007789 gas Substances 0.000 claims abstract description 55
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000002912 waste gas Substances 0.000 claims description 9
- 238000003287 bathing Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of carbon disulfide method for recovering tail gas, including first-stage condenser, secondary condenser, three-level condenser, liquid nitrogen condensation device A, liquid nitrogen condensation device B, liquid nitrogen storage tank and carbon disulfide collecting tank, this method mainly includes the following steps: that exhaust gas passes through first-stage condenser first, secondary condenser and three-level condenser cool down step by step, liquid nitrogen storage tank carries out offer liquid nitrogen to liquid nitrogen condensation device A and liquid nitrogen condensation device B, very big VOCs exhaust gas initially enters the VOCs solid matter that liquid nitrogen condensation device A was frozen in heat exchange pipe surface with a upper condensation period and directly contacts, exchange heat, the heating of VOCs solid matter is dissolved, the condensate liquid of generation enters carbon disulfide collecting tank from bottom, and VOCs exhaust gas is then pre-chilled to -30 DEG C, enter back into liquid nitrogen condensation device B and liquid nitrogen indirect heat exchange, in exhaust gas VOCs is cooled, condenses to set temperature.The rate of recovery of a kind of carbon disulfide method for recovering tail gas provided by the invention, CS2 is high, and overall cost is low, saves energy consumption.
Description
Technical field
The present invention relates to carbon disulfide tail gas recycle process field, in particular to a kind of carbon disulfide exhaust gas recovery system and
Method.
Background technique
Carbon disulfide is a kind of common organic solvent and industrial chemicals, in rubber chemicals, viscose rayon, pesticide and glass
The industries extensive application such as paper.Carbon disulfide generates a large amount of tail gas in production, storage and application, the exhaust gas high poison, it is inflammable,
It is explosive, it is very harmful to environmental and human health impacts.Since the boiling point of carbon disulfide is 46.3 DEG C, specific gravity 1.26g/ml, and not
It is dissolved in water.So most of manufacturers use vacuum water ring method to be collected tail gas substantially at present, -20 are then used again
DEG C chilled brine condensation+white oil absorption+rectification process recycling.As environmental requirement is more and more tighter, existing solvent recovery technology from vent gas
Have following defects that recovery process is complicated, equipment investment is larger, operation energy consumption is higher, the carbon disulfide rate of recovery is lower, Bu Nengda
To the emission request of national regulation.According to Environmental pollution energetically control and national energy conservation and emission reduction guilding principle,
Carbon disulfide condensation method recovery process is urgently to be resolved at present.
Summary of the invention
To solve the problems mentioned in the above background technology, the purpose of the present invention is to provide a kind of carbon disulfide tail gas to return
System and method is received, the rate of recovery is high, and overall cost is low.
In order to solve the above technical problems, technical solution provided by the invention are as follows:
A kind of carbon disulfide exhaust gas recovery system, comprising:
Water ring vacuum pump, for collecting exhaust gas；
Gas-liquid separator is connect with the water ring vacuum pump, carries out gas-liquid separation to exhaust gas；
Condenser, the condenser include first-stage condenser, secondary condenser and three-level condenser, the first-stage condenser and gas
Liquid/gas separator connection, the first-stage condenser, secondary condenser and three-level condenser are connected in series, for carrying out to exhaust gas
Cooling condensation；
Liquid nitrogen condensation device, the liquid nitrogen condensation device include liquid nitrogen condensation device A and liquid nitrogen condensation device B in parallel, the liquid nitrogen condensation
Device A and liquid nitrogen condensation device B are connect with the three-level condenser, are exchanged for carrying out heat with the VOCs in exhaust gas；
Liquid nitrogen storage tank, the liquid nitrogen storage tank are connect with the liquid nitrogen condensation device A and liquid nitrogen condensation device B, for being that liquid nitrogen is cold
Condenser A and liquid nitrogen condensation device B provides liquid nitrogen；
Curing nitrogen collecting tank, the curing nitrogen collecting tank and first-stage condenser, secondary condenser, three-level condenser, liquid nitrogen
Condenser A and liquid nitrogen condensation device B are attached, for collecting waste gas condensation liquid；
Air-bathing gasifier, the air-bathing gasifier are connect with liquid nitrogen condensation device A and liquid nitrogen condensation device B, for treated
Acceptable exhaust is warming up to environment temperature, after adjusting pressure using valve group, uses into Nitrogen pipe network.
As an improvement, being equipped with liquid on the connecting line of the liquid nitrogen storage tank and liquid nitrogen condensation device A and liquid nitrogen condensation device B
Nitrogen regulating valve.
A kind of carbon disulfide method for recovering tail gas, applied to the carbon disulfide exhaust gas recovery system in claim 1, specifically
Including following methods:
Dry waste gas and storage-tank waste gas are handled by water ring vacuum pump and gas-liquid separator, subsequently into condenser, by level-one
Condenser, secondary condenser and three-level condenser cool down step by step, and quenching exhaust gas is directly entered condenser；Liquid nitrogen storage tank is cold to liquid nitrogen
Condenser A and liquid nitrogen condensation device B provide liquid nitrogen, through condenser treated greatly VOCs exhaust gas initially enter liquid nitrogen condensation device A with
The VOCs solid matter that a upper condensation period is frozen in heat exchange pipe surface directly contacts, and exchanges heat, VOCs solid matter liter
Temperature is dissolved, and the condensate liquid of generation enters carbon disulfide collecting tank from bottom；And VOCs exhaust gas is then pre-chilled to -30 DEG C, then
Into liquid nitrogen condensation device B and liquid nitrogen indirect heat exchange, the VOCs in exhaust gas is cooled, condenses to set temperature, is then discharged out.
As an improvement, the chemicals that the liquid nitrogen condensation device A and liquid nitrogen condensation device B are condensed into liquid flows into curing certainly
Carbon collecting tank need to start efflux pump for liquid chemical and be transported to designated position when liquid level reach a certain height.
The beneficial effects of the present invention are:
The present invention improves the rate of recovery of CS2, and the rate of recovery of the rate of recovery 28 ~ 32% of former CS2, present CS2 is greater than 97%.New process
CS2 energy qualified discharge, original process are difficult qualified discharge.The characteristic of high concentration VOC is applicable according to liquid nitrogen condensation, new process deactivates white
Oil absorbs process, and CS2 tail gas is directly entered liquid nitrogen condensation qualified discharge after three-level is condensed.It is former due to having got rid of white oil absorption
It is also accordingly deactivated to handle/regenerate the rectification working process of white oil absorbing liquid, simplifies process flow, energy consumption is greatly saved.Liquid nitrogen
The nitrogen for condensing gasification, rises again through air-bathing gasifier, control valve group pressure regulation, into factory's Nitrogen pipe network for nitrogen protection and
Purging, originally nitrogen making machine can deactivate or spare, further save energy consumption.Production security improves: liquid nitrogen condensation system
It is run under low temperature and inert gas shielding, the white oil that compares absorbs, and heating rectifying regeneration purification, the safety of production is significantly
It improves.Liquid nitrogen condensation process portion does not have the dynamic equipment such as blower, pump, and plant maintenance is few, and operational reliability improves.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of carbon disulfide exhaust gas recovery system of the present invention.
Wherein: 1, first-stage condenser；2, secondary condenser；3, three-level condenser；4, water ring vacuum pump；5, gas-liquid separation
Device；6, liquid nitrogen condensation device A；7, liquid nitrogen condensation device B；8, curing nitrogen collecting tank；9, air-bathing gasifier；10, liquid nitrogen regulating valve；
11, liquid nitrogen storage tank.
Specific embodiment
Illustrate the present invention with specific embodiment below, is not limitation of the present invention.
A kind of carbon disulfide exhaust gas recovery system, comprising:
Water ring vacuum pump 4, for collecting exhaust gas；
Gas-liquid separator 5 is connect with the water ring vacuum pump 4, carries out gas-liquid separation to exhaust gas；
Condenser, the condenser include first-stage condenser 1, secondary condenser 2 and three-level condenser 3, the first-stage condenser 1
Connect with gas-liquid separator 5, the first-stage condenser 1, secondary condenser 2 and three-level condenser 3 are connected in series, for pair
Exhaust gas carries out cooling condensation；
Liquid nitrogen condensation device, the liquid nitrogen condensation device include liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7, the liquid nitrogen in parallel cold
Condenser A6 and liquid nitrogen condensation device B7 are connect with the three-level condenser 3, are exchanged for carrying out heat with the VOCs in exhaust gas；
Liquid nitrogen storage tank 11, the liquid nitrogen storage tank 11 are connect with the liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7, for for
Liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7 provides liquid nitrogen；
Curing nitrogen collecting tank 8, the curing nitrogen collecting tank 8 and first-stage condenser 1, secondary condenser 2, three-level condenser 3,
Liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7 are attached, for collecting waste gas condensation liquid；
Air-bathing gasifier 9, the air-bathing gasifier 9 is connect with liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7, for handling
Acceptable exhaust afterwards is warming up to environment temperature, after adjusting pressure using valve group, uses into Nitrogen pipe network.
Liquid nitrogen tune is equipped on the connecting line of the liquid nitrogen storage tank 11 and liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7
Save valve 10.
A kind of carbon disulfide method for recovering tail gas, applied to the carbon disulfide exhaust gas recovery system in claim 1, specifically
Including following methods:
Dry waste gas and storage-tank waste gas are handled by water ring vacuum pump 4 and gas-liquid separator 5, subsequently into condenser, by one
Grade condenser 1, secondary condenser 2 and three-level condenser 3 cool down step by step, and quenching exhaust gas is directly entered condenser；Liquid nitrogen storage tank pair
Liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7 provide liquid nitrogen, and through condenser, treated that greatly to initially enter liquid nitrogen cold for VOCs exhaust gas
The VOCs solid matter that condenser A6 was frozen in heat exchange pipe surface with a upper condensation period directly contacts, and exchanges heat, VOCs is solid
The heating of body substance is dissolved, and the condensate liquid of generation enters carbon disulfide collecting tank from bottom；And VOCs exhaust gas be then pre-chilled to-
30 DEG C, liquid nitrogen condensation device B7 and liquid nitrogen indirect heat exchange are entered back into, the VOCs in exhaust gas is cooled, condenses to set temperature, then
Discharge.
The chemicals that the liquid nitrogen condensation device A6 and liquid nitrogen condensation device B7 is condensed into liquid flows into carbon disulfide collection certainly
Tank need to start efflux pump for liquid chemical and be transported to designated position when liquid level reach a certain height.
Embodiment
Certain Fine Chemical Works used three-level (normal-temperature water is in conjunction with cool brine) condensation to return in conjunction with white oil absorption technique originally
CS2 is received, the CS2 rate of recovery is 28% ~ 32%, and a large amount of CS2 exhaust gas need to handle.It determines to use liquid nitrogen condensation technique, liquid nitrogen condensation
After device operation, eliminates white oil and absorb process, the VOCs rate of recovery rises to 99%.Liquid nitrogen cost is deducted, which both reaches ring
Guaranteed request, and have certain economic benefit.
Table 1: 1 liquid nitrogen condensation VOC of case administers recovery technology parameter
| Parameter | Data |
| VOC flow (M3/h) | 600 |
| VOC composition | CS2 |
| Import VOC concentration (mg/m3) | 150000~400000 |
| It exports VOC concentration (mg/m3) | 80 |
| Reuse N2Pressure MPa | 0.6 |
| CS2Rate of recovery % | 99 |
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, and it is any
Those familiar with the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its invents
Design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of carbon disulfide exhaust gas recovery system characterized by comprising
Water ring vacuum pump, for collecting exhaust gas；
Gas-liquid separator is connect with the water ring vacuum pump, carries out gas-liquid separation to exhaust gas；
Condenser, the condenser include first-stage condenser, secondary condenser and three-level condenser, the first-stage condenser and gas
Liquid/gas separator connection, the first-stage condenser, secondary condenser and three-level condenser are connected in series, for carrying out to exhaust gas
Cooling condensation；
Liquid nitrogen condensation device, the liquid nitrogen condensation device include liquid nitrogen condensation device A and liquid nitrogen condensation device B in parallel, the liquid nitrogen condensation
Device A and liquid nitrogen condensation device B are connect with the three-level condenser, are exchanged for carrying out heat with the VOCs in exhaust gas；
Liquid nitrogen storage tank, the liquid nitrogen storage tank are connect with the liquid nitrogen condensation device A and liquid nitrogen condensation device B, for being that liquid nitrogen is cold
Condenser A and liquid nitrogen condensation device B provides liquid nitrogen；
Curing nitrogen collecting tank, the curing nitrogen collecting tank and first-stage condenser, secondary condenser, three-level condenser, liquid nitrogen
Condenser A and liquid nitrogen condensation device B are attached, for collecting waste gas condensation liquid；
Air-bathing gasifier, the air-bathing gasifier are connect with liquid nitrogen condensation device A and liquid nitrogen condensation device B, for treated
Acceptable exhaust is warming up to environment temperature, after adjusting pressure using valve group, uses into Nitrogen pipe network.
2. a kind of carbon disulfide exhaust gas recovery system according to claim 1, which is characterized in that the liquid nitrogen storage tank with
Liquid nitrogen regulating valve is equipped on the connecting line of liquid nitrogen condensation device A and liquid nitrogen condensation device B.
3. a kind of recovery method applied to the carbon disulfide exhaust gas recovery system described in claim 1, which is characterized in that tool
Body includes following methods:
Dry waste gas and storage-tank waste gas are handled by water ring vacuum pump and gas-liquid separator, subsequently into condenser, by level-one
Condenser, secondary condenser and three-level condenser cool down step by step, and quenching exhaust gas is directly entered condenser；Liquid nitrogen storage tank is cold to liquid nitrogen
Condenser A and liquid nitrogen condensation device B provide liquid nitrogen, through condenser treated greatly VOCs exhaust gas initially enter liquid nitrogen condensation device A with
The VOCs solid matter that a upper condensation period is frozen in heat exchange pipe surface directly contacts, and exchanges heat, VOCs solid matter liter
Temperature is dissolved, and the condensate liquid of generation enters carbon disulfide collecting tank from bottom；And VOCs exhaust gas is then pre-chilled to -30 DEG C, then
Into liquid nitrogen condensation device B and liquid nitrogen indirect heat exchange, the VOCs in exhaust gas is cooled, condenses to set temperature, is then discharged out.
4. a kind of carbon disulfide method for recovering tail gas according to claim 2, which is characterized in that the liquid nitrogen condensation device A
And liquid nitrogen condensation device B is condensed into the chemicals of liquid from flowing into carbon disulfide collecting tank, when liquid level reach a certain height, need to open
Liquid chemical is transported to designated position by dynamic efflux pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761084.3A CN110420534B (en) | 2019-08-17 | 2019-08-17 | Carbon disulfide tail gas recovery system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761084.3A CN110420534B (en) | 2019-08-17 | 2019-08-17 | Carbon disulfide tail gas recovery system and method |
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| CN110420534A true CN110420534A (en) | 2019-11-08 |
| CN110420534B CN110420534B (en) | 2021-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111265969A (en) * | 2020-03-20 | 2020-06-12 | 鹤壁市恒力橡塑股份有限公司 | Method for efficiently recovering carbon disulfide from tail gas |
| CN113483582A (en) * | 2021-06-29 | 2021-10-08 | 浙江省天正设计工程有限公司 | Freezer suitable for VOCs tail gas treatment |
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| CN111265969A (en) * | 2020-03-20 | 2020-06-12 | 鹤壁市恒力橡塑股份有限公司 | Method for efficiently recovering carbon disulfide from tail gas |
| CN113483582A (en) * | 2021-06-29 | 2021-10-08 | 浙江省天正设计工程有限公司 | Freezer suitable for VOCs tail gas treatment |
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| CN110420534B (en) | 2021-09-07 |
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