CN110523226A - A kind of Chlorcosane tail gas treatment process and absorption equipment - Google Patents
A kind of Chlorcosane tail gas treatment process and absorption equipment Download PDFInfo
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- CN110523226A CN110523226A CN201910848916.5A CN201910848916A CN110523226A CN 110523226 A CN110523226 A CN 110523226A CN 201910848916 A CN201910848916 A CN 201910848916A CN 110523226 A CN110523226 A CN 110523226A
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- tail gas
- tower
- absorption
- degassing
- kettle
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title claims abstract description 27
- QKUNKVYPGIOQNP-UHFFFAOYSA-N 4,8,11,14,17,21-hexachlorotetracosane Chemical compound CCCC(Cl)CCCC(Cl)CCC(Cl)CCC(Cl)CCC(Cl)CCCC(Cl)CCC QKUNKVYPGIOQNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 111
- 238000007872 degassing Methods 0.000 claims abstract description 59
- 239000000919 ceramic Substances 0.000 claims abstract description 35
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000012188 paraffin wax Substances 0.000 claims abstract description 33
- 125000001309 chloro group Chemical group Cl* 0.000 claims abstract description 24
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 20
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005496 tempering Methods 0.000 claims abstract description 17
- 239000011552 falling film Substances 0.000 claims abstract description 16
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 238000010828 elution Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 11
- 239000000460 chlorine Substances 0.000 claims description 11
- 229910052801 chlorine Inorganic materials 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- 238000005660 chlorination reaction Methods 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000001993 wax Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001257 Nb alloy Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000010408 film Substances 0.000 claims description 3
- DTSBBUTWIOVIBV-UHFFFAOYSA-N molybdenum niobium Chemical compound [Nb].[Mo] DTSBBUTWIOVIBV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000006298 dechlorination reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- 235000002568 Capsicum frutescens Nutrition 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 210000001533 respiratory mucosa Anatomy 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- 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
- B01D53/14—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 absorption
- B01D53/1406—Multiple stage absorption
-
- 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
- B01D53/14—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 absorption
- B01D53/1412—Controlling the absorption process
-
- 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
- B01D53/14—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 absorption
- B01D53/1456—Removing acid components
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/202—Single element halogens
- B01D2257/2025—Chlorine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
- C10G73/38—Chemical modification of petroleum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a kind of Chlorcosane tail gas treatment process and absorption equipments, the treatment process includes that degassing kettle gets rid of de-, tempering tower elution, falling film absorption, ceramic ring absorption and alkali suction and puts, two film-falling absorption towers and two ceramic ring absorption towers are increased on the basis of the kettle that deaerates, degassing buffering tower apparatus, further the tail gas in-depth generated in chlorinated paraffin production process is handled, thoroughly absorbs chlorine residue and hydrogen chloride gas present in tail gas.The absorption equipment includes degassing kettle corresponding with treatment process, degassing tempering tower, film-falling absorption tower, ceramic ring packed tower and lye absorption tower etc., ensure that the gas that chlorinated-paraffin producing process is discharged reaches relevant environmental protection standard.
Description
Technical field
The present invention relates to a kind of Chlorcosane tail gas treatment process and absorption equipments.
Background technique
Chlorinated paraffin is the chlorinated derivatives of paraffin hydrocarbon, has that low volatility, fire-retardant, electrical insulating property is good, inexpensive etc. excellent
Point can be used as fire retardant and polyvinyl chloride extender plasticizer.Currently, chlorination mainly has hot chlorine in chlorinated-paraffin producing process
Change method, catalytic chlorination process and photocatalysis chlorination method, the tail gas that chloridization process generates are chlorine residue and hydrogen chloride gas, and chlorine is a kind of
Toxic gas, it can be invaded human body by respiratory tract and is dissolved in moisture contained by mucous membrane, hypochlorous acid and hydrochloric acid be generated, to upper
Respiratory mucosa causes to damage；And chlorine has serious harm to environment, can pollute to water body, and wet chlorine has strong
Corrosivity.Hydrogen chloride is a kind of colourless non-combustible gas, there is polar stimulation smell, and specific gravity is greater than air, meets wet air and produces
Raw white haze, is highly soluble in water, generates hydrochloric acid.There is strong corrosive, can be reacted with various metals and generate hydrogen, can formed with air quick-fried
Fried property mixture meets cyanide and generates hypertoxic hydrogen cyanide.
Therefore, chlorinated paraffin production tail gas absorption treatment process is the part for needing to consider emphatically in whole production technology.
Chinese patent literature CN104560197A announces a kind of tail gas treatment process of chlorinated paraffin, the technique use chlorine and wax oil for
Raw material is reacted, and wax oil is pumped into chlorine residue absorption tower and increases wax oil temperature by heat exchange, then will be passed through in degasser
After the hydrogen chloride and chlorine residue removed for the first time by air blower be pressed into chlorine residue absorption tower in again with the raised chili oil of temperature again into
Row heat exchange further absorbs.In fact, the gas of discharge still contains after the processing of the tail gas treatment process of the chlorinated paraffin
Have a small amount of chlorine and hydrogen chloride gas, do not meet relevant discharge standard, thus need to be to the gas of discharge further absorption at
Reason.
Summary of the invention
For the vent gas treatment problem that above-mentioned chlorinated-paraffin producing process generates, the present invention provides a kind of Chlorcosane tail gas
Treatment process and absorption equipment, by corresponding equipment by last emission chlorine residue and hydrogen chloride gas it is further abundant
It absorbs, reaches discharge standard.Specific technical solution is as follows:
A kind of Chlorcosane tail gas treatment process, comprises the following steps that
1) degassing kettle is got rid of de-: the chlorinated paraffin that chlorination reaction obtains is sent into degassing kettle through chlorinated paraffin receiving slit, in degassing kettle
Under the centrifugal action of interior throwing disc, liquid chlorinated paraffin forms the liquid film of decline in degassing kettle inner wall, by unreacted chlorine residue and chlorine
Change hydrogen gets rid of to take off from chlorinated paraffin and separate, and obtains I grade of tail gas to be processed；
2) tempering tower elutes: I grade of tail gas to be processed of de- acquisition is got rid of through step 1), is passed through degassing tempering tower and is carried out spray elution,
So that water is absorbed a large amount of chlorine residue and hydrogen chloride gas in tail gas, thus obtain dilute hydrochloric acid liquid and containing unabsorbed chlorine residue and
II grade of tail gas to be processed of hydrogen chloride gas, the dilute hydrochloric acid liquid are sent into dilute hydrochloric acid slot and are separately processed, and described II grade to be processed
Tail gas carries out a step processing；
3) alkali suction is put: II grade of tail gas to be processed described in step 2, a part flow directly into lye absorption tower, inhale through lye
It receives after absorbing, in the high altitude discharge of 25m or more；
4) falling film absorption: the unabsorbed II grade of tail gas to be processed of another part of step 2 successively flows into stage falling-film absorption tower
With second level film-falling absorption tower, III grade of tail gas to be processed is obtained after the absorption of two-stage film-falling absorption tower；
5) ceramic ring absorbs: obtaining III grade of tail gas to be processed in step 4), then successively flows into level-one ceramic ring packed tower and second level ceramic ring
Packed tower, obtains IV grade of tail gas to be processed after the absorption of two-stage ceramic ring packed tower, this IV grade direct lye of tail gas to be processed absorbs
Tower repeats the suction of step 3) alkali and puts.
Above-mentioned kind of Chlorcosane tail gas treatment process, degassing kettle described in step 1) are jacketed heat exchange steam kettle, are taken off
It is conducive to subsequent processing after the heat in chlorine residue and absorbing hydrogen chloride gas degassing kettle collet out.
Preferably, the steam pressure of the degassing kettle is 0.2~0.5MPa, and vapor (steam) temperature is 70 DEG C~80 DEG C.
According to claim 1 or 2 kind of Chlorcosane tail gas treatment process, the throwing disc to deaerate in kettle are resistance to height
The material of the low-carbon nickel chrome molybdenum niobium alloy of warm acid and alkali-resistance is made, and the de- revolving speed that gets rid of of throwing disc is 50~150rpm.
Preferably, the spray elution requirement of spray column is buffered described in step 2 are as follows: 25~30 DEG C of temperature, pressure 0.2~
0.3MPa。
With the corresponding absorption equipment of above-mentioned Chlorcosane tail gas processing absorption technique, including degassing kettle, degassing tempering tower,
Stage falling-film absorption tower, second level film-falling absorption tower, level-one ceramic ring packed tower, second level ceramic ring packed tower and lye absorption tower；It is described
The kettle that deaerates connects chlorinated paraffin receiving slit, for by chlorine residue unreacted in chlorinated paraffin and hydrogen chloride gas, he to deviate from；It is described de-
Gas tempering tower is separately connected degassing kettle, stage falling-film absorption tower and lye absorption tower, the tail gas for spray-absorption abjection；It is described
Stage falling-film absorption tower, second level film-falling absorption tower, level-one ceramic ring packed tower and second level ceramic ring packed tower gas phase be sequentially connected, use
Tail gas is absorbed in classification；The lye absorption tower is located at most terminal, and for absorbing tail gas and discharging, height is >=25m.
Chlorcosane tail gas above-mentioned handles absorption equipment, and the degassing kettle is jacketed heat exchange steam kettle, the collet
Interior steam pressure is 0.2~0.5MPa, and vapor (steam) temperature is 70 DEG C~80 DEG C.
Preferably, throwing disc device is equipped in the degassing kettle, for receiving the gas got rid of in dechlorination fossil waxes；The throwing disc
Device includes the servo motor positioned at degassing kettle top portion, and the batch mixing pan below degassing kettle material inlet valve, the batch mixing pan
It is connect by bearing with servo motor.
Preferably, the degassing tempering tower is the gas-liquid two-phase spray column with air blower, and bottom is equipped with packing support plate
Plate, filler are placed on support plate in a manner of huddling, and hold-down grid is installed in the top of filler, are blown to prevent being raised air-flow.
Preferably, the filler in the level-one ceramic ring packed tower is Raschig ring, the filler in the second level ceramic ring packed tower
For Pall ring.
The utility model has the advantages that
The present invention increases two film-falling absorption towers on the basis of the kettle that deaerates, degassing buffering tower apparatus and two ceramic rings absorb
Tower is further handled the tail gas in-depth generated in chlorinated paraffin production process, thoroughly absorbs chlorine residue and chlorine present in tail gas
Change hydrogen, the gas finally excluded meets discharge standard through detection, further ensures the reached ring of chlorinated-paraffin producing process
The standard of guarantor, has great importance.
Detailed description of the invention
Fig. 1 is Chlorcosane tail gas processing technological flow figure of the present invention；
Fig. 2 is that Chlorcosane tail gas of the present invention handles absorption equipment schematic diagram.
Specific embodiment
Below in conjunction with examples and drawings, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
Embodiment 1
A kind of Chlorcosane tail gas processing absorption equipment, as shown in Fig. 2, including degassing kettle, degassing tempering tower, stage falling-film absorption
Tower, second level film-falling absorption tower, level-one ceramic ring packed tower, second level ceramic ring packed tower and lye absorption tower；The degassing kettle connects chlorine
Fossil waxes receiving slit, for he to deviate from by chlorine residue unreacted in chlorinated paraffin and hydrogen chloride gas；The degassing tempering tower difference
Connection degassing kettle, stage falling-film absorption tower and lye absorption tower, the tail gas for spray-absorption abjection；The stage falling-film absorbs
Tower, second level film-falling absorption tower, level-one ceramic ring packed tower and second level ceramic ring packed tower gas phase be sequentially connected, absorb tail for being classified
Gas；The lye absorption tower is located at most terminal, and for absorbing tail gas and discharging, height is >=25m.It realizes further to chlorination
The purpose of the tail gas in-depth processing generated in paraffin production process, thoroughly absorbs chlorine residue and hydrogen chloride gas present in tail gas,
The gas finally excluded meets discharge standard through detection, further ensures that chlorinated-paraffin producing process reaches the standard of environmental protection,
Have great importance.
As preferred embodiment, the degassing kettle is jacketed heat exchange steam kettle, the vapour pressure in the collet
Power is 0.5MPa, and vapor (steam) temperature is 80 DEG C.It is further preferred that being equipped with throwing disc device in the degassing kettle, got rid of for reception de-
Gas in chlorinated paraffin；The throwing disc device includes the servo motor positioned at degassing kettle top portion, and is located at degassing kettle inlet valve
The batch mixing pan of door lower section, the batch mixing pan are connect by bearing with servo motor.And in the present embodiment, the degassing tempering tower is
Gas-liquid two-phase spray column with air blower, bottom are equipped with supporting plate, and filler is placed on support plate in a manner of huddling,
Hold-down grid is installed in the top of filler, blows to prevent being raised air-flow.Filler in the level-one ceramic ring packed tower is Raschig ring,
Filler in the second level ceramic ring packed tower is Pall ring.
Embodiment 2
As shown in Figure 1, the step of carrying out vent gas treatment using the processing absorption equipment of Chlorcosane tail gas described in embodiment 1 is such as
Under:
1) degassing kettle is got rid of de-: the chlorinated paraffin that chlorination reaction obtains is sent into degassing kettle through chlorinated paraffin receiving slit, in degassing kettle
Under the centrifugal action of interior throwing disc, liquid chlorinated paraffin forms the liquid film of decline in degassing kettle inner wall, by unreacted chlorine residue and chlorine
Change hydrogen gets rid of to take off from chlorinated paraffin and separate, and obtains I grade of tail gas to be processed.Throwing disc in the degassing kettle is high temperature resistant
The material of the low-carbon nickel chrome molybdenum niobium alloy of acid and alkali-resistance is made, and the de- revolving speed that gets rid of of throwing disc is 150rpm.The degassing kettle is jacketed
Exchange heat steam kettle, and the steam pressure of the degassing kettle is 0.5MPa, and vapor (steam) temperature is 70 DEG C, the chlorine residue of abjection and hydrogen chloride gas
It is conducive to subsequent processing after absorbing the heat on degassing kettle collet.
2) tempering tower elutes: getting rid of I grade of tail gas to be processed of de- acquisition through step 1), is passed through degassing tempering tower in 30 DEG C of temperature
Under degree, pressure is that 0.3MPa carries out spray elution, so that water is absorbed a large amount of chlorine residue and hydrogen chloride gas in tail gas, to obtain dilute
Hydrochloric acid liquid and II grade of tail gas to be processed containing unabsorbed chlorine residue and hydrogen chloride gas, the dilute hydrochloric acid liquid are sent into dilute
Hydrochloric acid trough separately processes, and II grade of tail gas to be processed carries out a step processing.
3) alkali suction is put: II grade of tail gas to be processed described in step 2, a part flows directly into lye absorption tower, through alkali
After liquid absorbs, in the high altitude discharge of 25m or more；
4) falling film absorption: the unabsorbed II grade of tail gas to be processed of another part of step 2 successively flows into stage falling-film absorption tower
With second level film-falling absorption tower, III grade of tail gas to be processed is obtained after the absorption of two-stage film-falling absorption tower；
5) ceramic ring absorbs: obtaining III grade of tail gas to be processed in step 4), then successively flows into level-one ceramic ring packed tower and second level ceramic ring
Packed tower, obtains IV grade of tail gas to be processed after the absorption of two-stage ceramic ring packed tower, this IV grade direct lye of tail gas to be processed absorbs
Tower repeats the suction of step 3) alkali and puts.
The present invention increases two film-falling absorption towers and two ceramic rings on the basis of the kettle that deaerates, degassing buffering tower apparatus
Absorption tower is further handled the tail gas in-depth generated in chlorinated paraffin production process, thoroughly absorbs chlorine residue present in tail gas
And hydrogen chloride gas, the gas finally excluded meet discharge standard through detection, further ensure that chlorinated-paraffin producing process is reached
To the standard of environmental protection, have great importance.
Claims (10)
1. a kind of Chlorcosane tail gas treatment process, it is characterised in that: comprise the following steps that
1) degassing kettle is got rid of de-: the chlorinated paraffin that chlorination reaction obtains is sent into degassing kettle through chlorinated paraffin receiving slit, in degassing kettle
Under the centrifugal action of interior throwing disc, liquid chlorinated paraffin forms the liquid film of decline in degassing kettle inner wall, by unreacted chlorine residue and chlorine
Change hydrogen gets rid of to take off from chlorinated paraffin and separate, and obtains I grade of tail gas to be processed；
2) tempering tower elutes: I grade of tail gas to be processed of de- acquisition is got rid of through step 1), is passed through degassing tempering tower and is carried out spray elution,
So that water is absorbed a large amount of chlorine residue and hydrogen chloride gas in tail gas, thus obtain dilute hydrochloric acid liquid and containing unabsorbed chlorine residue and
II grade of tail gas to be processed of hydrogen chloride gas, the dilute hydrochloric acid liquid are sent into dilute hydrochloric acid slot and are separately processed, and described II grade to be processed
Tail gas carries out a step processing；
3) alkali suction is put: II grade of tail gas to be processed described in step 2, a part flow directly into lye absorption tower, inhale through lye
It receives after absorbing, in the high altitude discharge of 25m or more；
4) falling film absorption: the unabsorbed II grade of tail gas to be processed of another part of step 2 successively flows into stage falling-film absorption tower
With second level film-falling absorption tower, III grade of tail gas to be processed is obtained after the absorption of two-stage film-falling absorption tower；
5) ceramic ring absorbs: obtaining III grade of tail gas to be processed in step 4), then successively flows into level-one ceramic ring packed tower and second level ceramic ring
Packed tower, obtains IV grade of tail gas to be processed after the absorption of two-stage ceramic ring packed tower, this IV grade direct lye of tail gas to be processed absorbs
Tower repeats the suction of step 3) alkali and puts.
2. Chlorcosane tail gas treatment process according to claim 1, it is characterised in that: described in step 1) degassing kettle be
It is conducive to subsequent processing after the heat that jacketed heat exchange steam kettle, the chlorine residue of abjection and absorbing hydrogen chloride gas deaerate on kettle collet.
3. Chlorcosane tail gas treatment process according to claim 2, it is characterised in that: the steam pressure of the degassing kettle
For 0.2~0.5MPa, vapor (steam) temperature is 70 DEG C~80 DEG C.
4. Chlorcosane tail gas treatment process according to claim 1 or 2, it is characterised in that: getting rid of in the degassing kettle
Disk is made of the material of the low-carbon nickel chrome molybdenum niobium alloy of high temperature-resistant acid-resistant alkali, and the de- revolving speed that gets rid of of throwing disc is 50~150rpm.
5. Chlorcosane tail gas treatment process according to claim 1, it is characterised in that: buffer spray described in step 2
The spray elution requirement of tower are as follows: 25~30 DEG C of temperature, 0.2~0.3MPa of pressure.
6. a kind of Chlorcosane tail gas handles absorption equipment, it is characterised in that: including degassing kettle, degassing tempering tower, stage falling-film
Absorption tower, second level film-falling absorption tower, level-one ceramic ring packed tower, second level ceramic ring packed tower and lye absorption tower；The degassing kettle connects
Chlorinated paraffin receiving slit is connect, for he to deviate from by chlorine residue unreacted in chlorinated paraffin and hydrogen chloride gas；The degassing tempering tower
It is separately connected degassing kettle, stage falling-film absorption tower and lye absorption tower, the tail gas for spray-absorption abjection；The stage falling-film
Absorption tower, second level film-falling absorption tower, level-one ceramic ring packed tower and second level ceramic ring packed tower gas phase be sequentially connected, inhaled for being classified
Finish up gas；The lye absorption tower is located at most terminal, and for absorbing tail gas and discharging, height is >=25m.
7. Chlorcosane tail gas according to claim 6 handles absorption equipment, it is characterised in that: the degassing kettle is band folder
Hot steam kettle is bought or get by illegal means, the steam pressure in the collet is 0.2~0.5MPa, and vapor (steam) temperature is 70 DEG C~80 DEG C.
8. Chlorcosane tail gas according to claim 6 or 7 handles absorption equipment, it is characterised in that: in the degassing kettle
Equipped with throwing disc device, for receiving the gas got rid of in dechlorination fossil waxes；The throwing disc device includes watching positioned at degassing kettle top portion
Motor is taken, and the batch mixing pan below degassing kettle material inlet valve, the batch mixing pan are connect by bearing with servo motor.
9. Chlorcosane tail gas according to claim 6 handles absorption equipment, it is characterised in that: the degassing tempering tower is
Gas-liquid two-phase spray column with air blower, bottom are equipped with supporting plate, and filler is placed on support plate in a manner of huddling,
Hold-down grid is installed in the top of filler, blows to prevent being raised air-flow.
10. Chlorcosane tail gas according to claim 6 handles absorption equipment, it is characterised in that: the level-one ceramic ring is filled out
Expect that the filler in tower is Raschig ring, the filler in the second level ceramic ring packed tower is Pall ring.
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