CN110422825A - A kind of HCl recovery Processes and apparatus in chlorinated paraffin production process - Google Patents
A kind of HCl recovery Processes and apparatus in chlorinated paraffin production process Download PDFInfo
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- CN110422825A CN110422825A CN201910848919.9A CN201910848919A CN110422825A CN 110422825 A CN110422825 A CN 110422825A CN 201910848919 A CN201910848919 A CN 201910848919A CN 110422825 A CN110422825 A CN 110422825A
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- 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
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- 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
- B01D53/1418—Recovery of products
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- 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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
- C01B7/0731—Purification ; Separation of hydrogen chloride by extraction
- C01B7/0737—Purification ; Separation of hydrogen chloride by extraction hydrogen chloride being extracted
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- 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
Abstract
The invention discloses the HCl recovery Processes and apparatus in a kind of chlorinated paraffin production process, the recovery process three-level checks on, second level falling liquid film recycling, second level ceramic ring recycling, alkali suction are put, seven steps such as extraction processing only, realizes the hydrochloric acid multistage recycling in chlorinated paraffin production process；Corresponding with the reclaimer that the recovery process is mutually equipped with includes that three kettles of checking on, two film-falling absorption towers, two ceramic ring packed towers, the alkali checked on as tail gas inhale tower and the net tower of extraction as recycling hydrochloric acid essence, as far as possible by Chlorcosane tail gas chlorine residue and absorbing hydrogen chloride gas conversion hydrochloric acid and recycle, the dilute hydrochloric acid of the recycling can be used as other technical hydrochloric acids, realize resource recycling, on the basis of not increasing purification cost, increase the income of enterprise, with good economic efficiency and use value.
Description
Technical field
The present invention relates to the HCl recovery Processes and apparatus in a kind of chlorinated paraffin production process.
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 whole production
The part for needing to consider emphatically in technique.
Common processing mode is the tail gas by chlorinated paraffin production generation using discharging after the absorption cleaning of absorption tower, in this way
Processing mode, need a large amount of exhaust gas purification equipment, and be absorbed tower absorption chlorine and hydrogen chloride gas cannot be again
It utilizes, not only result in waste of resources but also wastes a large amount of purification cost.Therefore, it is necessary to the tail generated to chlorinated paraffin production
Gas purification style optimizes, and the HCl recovery that tail gas absorption is obtained utilizes.
Summary of the invention
Existing problem of resource waste is handled for above-mentioned Chlorcosane tail gas, it is raw that the present invention provides a kind of chlorinated paraffin
HCl recovery Processes and apparatus during production, the hydrochloric acid that the tail gas clean-up generated in chlorinated paraffin production process is absorbed
Recycling and reusing.Specific technical solution is as follows:
A kind of HCl recovery technique in chlorinated paraffin production process, comprises the following steps that
1) three-level is checked on: the chlorinated paraffin production tail gas in engine manifold is acted on by cyclone separator, and a part is sent back to chlorine
To change kettle and participates in chlorination reaction again, another part is admitted to kettle of checking on, it is checked on after absorption by three-level kettle of checking on, the paraffin of liquid phase
It is sent back to chlorination tank chlorination again, the tail gas containing a small amount of chlorine residue and hydrogen chloride gas enters film-falling absorption tower；
2) stage falling-film recycles: entering stage falling-film absorption tower through the tail gas that three-level is checked in step 1), carries out falling film absorption, obtain
Obtain hydrochloric acid crude product I；
3) net extraction processing: the hydrochloric acid crude product I obtained in step 2 being introduced and extracts the net extraction processing of net tower progress, net extraction processing upper layer
Wax oil enter the second level that wax oil recycling can is transmitted back in step 1) and check on to check on again in kettle and separate its liquid phase, the hydrochloric acid of lower layer
Product is directly recovered in hydrochloric acid tank；
4) second level falling liquid film recycles: the gas in step 2 after stage falling-film absorption tower absorbs enters second level film-falling absorption tower again
Falling film absorption obtains hydrochloric acid crude product II, and hydrochloric acid crude product II flows back to stage falling-film absorption tower, then repeatedly step 3), realizes
The recycling of second level falling liquid film；
5) level-one ceramic ring recycles: level-one ceramic ring packed tower is passed through through step 4) second level falling liquid film tail gas after the recovery, through level-one ceramic ring
Packed tower recycling obtains hydrochloric acid crude product III, flows back to second level film-falling absorption tower, then flows back to stage falling-film absorption tower, repeats step
It is rapid 3), realize level-one ceramic ring recycling；
6) second level ceramic ring recycles: the tail gas recycled through step 5) level-one ceramic ring is passed through second level ceramic ring packed tower and further absorbs only
Change, resulting hydrochloric acid crude product IV flows back to level-one ceramic ring packed tower through dilute acid bath, then flows back to level-one through second level film-falling absorption tower
Film-falling absorption tower repeats step 3), realizes the recycling of second level ceramic ring；
7) alkali suction is put: the tail gas recycled through second level ceramic ring in step 6) is passed through lye absorption tower again, absorbs through lye absorption tower
Afterwards in the high altitude discharge of 25m or more.
HCl recovery technique in chlorinated paraffin production process above-mentioned, three-level described in step 1) check on kettle as level-one
Kettle, the second level of checking on check on kettle and three-level is checked on kettle, fills the wax oil of certain volume, temperature in the kettle control within three kettles of checking on
80~120 DEG C are made as, pressure is normal pressure.
HCl recovery technique in chlorinated paraffin production process above-mentioned, the hydrochloric acid in dilute hydrochloric acid slot described in step 6) are thick
Product IV includes that degassed tempering tower absorbs the dilute hydrochloric acid generated after tail gas.
Equipment corresponding with the HCl recovery technique in aforementioned chlorinated paraffin production process includes: check on kettle, falling film absorption
Tower, the net tower of extraction and ceramic ring packed tower；The kettle of checking on includes that check on kettle, second level of level-one checks on kettle and three-level is checked on kettle, and this three
It checks on gas-liquid diconnected between kettle；The film-falling absorption tower includes stage falling-film absorption tower and second level film-falling absorption tower, described
Stage falling-film absorption tower and three-level kettle gas phase of checking on are connect, gas-liquid diconnected between two film-falling absorption tower；The extraction is net
Tower is connected to the downstream on stage falling-film absorption tower, is used for further extraction and recovery hydrochloric acid product；The ceramic ring packed tower includes one
Grade ceramic ring packed tower and second level ceramic ring packed tower, the level-one ceramic ring packed tower and second level film-falling absorption tower gas-liquid diconnected,
Also gas-liquid diconnected between the second level ceramic ring packed tower and level-one ceramic ring packed tower.
Preferably, the stage falling-film absorption tower is inhaled and second level film-falling absorption tower is countercurrent falling-film absorption tower.
Preferably, the net tower of extraction is weight packed extraction tower.
Preferably, the HCl recovery equipment in chlorinated paraffin production process above-mentioned, further includes cyclone separator, is located at
Level-one is checked on the upstream of kettle, for the tail gas generated in chlorinated paraffin production process to be sent into kettle of checking on from engine manifold.
Preferably, the branch road that the level-one ceramic ring packed tower is connect with second level film-falling absorption tower liquid phase is additionally provided with dilute hydrochloric acid
Slot absorbs the dilute hydrochloric acid generated after tail gas for receiving degassing tempering tower.
Preferably, the downstream of the net tower of extraction is equipped with the hydrochloric acid tank for connecing and being stored back to and receiving hydrochloric acid.
Preferably, the downstream on second level ceramic ring absorption tower is additionally provided with lye absorption tower, for further absorbing remnants'
Chlorine residue and hydrogen chloride gas and emission, the height on the lye absorption tower are >=25m.
The utility model has the advantages that
After the present invention checks on the chlorine residue in Chlorcosane tail gas by kettle of checking on, the stage falling-film through stage falling-film absorption tower is returned
It receives, the second level falling liquid film of second level film-falling absorption tower recycles, the level-one ceramic ring of level-one ceramic ring packed tower recycles and second level ceramic ring packed tower
The crash recycling such as second level ceramic ring recycling, and carry out net extraction processing by extracting net tower, as far as possible will be in Chlorcosane tail gas
Chlorine residue and absorbing hydrogen chloride gas recycling, the dilute hydrochloric acid can be used as other technical hydrochloric acids, realize resource recycling, do not increasing
On the basis of purifying cost, the income of enterprise, with good economic efficiency and use value are increased.
Detailed description of the invention
Fig. 1 is the HCl recovery process flow chart in chlorinated paraffin production process of the present invention；
Fig. 2 is the HCl recovery equipment schematic diagram in chlorinated paraffin production process of the present invention.
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
HCl recovery equipment in a kind of chlorinated paraffin production process, as shown in Fig. 2, including that check on kettle, film-falling absorption tower, extraction is net
Tower and ceramic ring packed tower；The kettle of checking on includes that check on kettle, second level of level-one checks on kettle and three-level is checked on kettle, this three check on kettle it
Between gas-liquid diconnected；The film-falling absorption tower includes stage falling-film absorption tower and second level film-falling absorption tower, the stage falling-film
Absorption tower and three-level kettle gas phase of checking on are connect, gas-liquid diconnected between two film-falling absorption tower；The net tower of extraction is connected to
The downstream on stage falling-film absorption tower is used for further extraction and recovery hydrochloric acid product；The ceramic ring packed tower includes that level-one ceramic ring is filled out
Expect tower and second level ceramic ring packed tower, the level-one ceramic ring packed tower and second level film-falling absorption tower gas-liquid diconnected, the second level
Also gas-liquid diconnected between ceramic ring packed tower and level-one ceramic ring packed tower, to realize that hydrochloric acid product multistage recycles).Described
The gas-liquid diconnected closed between kettle, film-falling absorption tower, the net tower of extraction and ceramic ring packed tower is reverse connection, for kettle of checking on
In, the paraffin oil of liquid phase is introduced from wax oil storage tank, and it flows into second level kettle of checking on from three-level kettle of checking on and checks on kettle flowing into level-one, and
The chlorine residue of gas phase and hydrogen chloride gas flow to second level and three-level are checked on kettle then on the contrary, it checks on kettle from level-one.Then, gas phase quilt
Be sent into stage falling-film absorption tower, pass sequentially through later stage falling-film absorption tower, second level film-falling absorption tower, level-one ceramic ring packed tower and
Second level ceramic ring packed tower is discharged after absorbing finally by lye absorption tower.Opposite, the liquid phase hydrochloric acid that each absorption tower generates is from two
Grade ceramic ring packed tower flows to level-one ceramic ring packed tower, then flows to second level film-falling absorption tower, second level falling liquid film by level-one ceramic ring packed tower
Liquid phase in absorption tower flows to stage falling-film absorption tower, is finally sent by stage falling-film absorption tower after extracting the net extraction processing of net tower progress
Recycling.
As preferred embodiment, the stage falling-film absorption tower is inhaled and second level film-falling absorption tower is that adverse current drops
Film absorption tower；The net tower of extraction is weight packed extraction tower.
HCl recovery equipment in chlorinated paraffin production process described in the present embodiment further includes cyclone separator, position
It checks on the upstream of kettle in level-one, for the tail gas generated in chlorinated paraffin production process to be sent into kettle of checking on from engine manifold.
HCl recovery equipment in chlorinated paraffin production process described in the present embodiment, the level-one ceramic ring packed tower and two
The branch road of grade film-falling absorption tower liquid phase connection is additionally provided with dilute hydrochloric acid slot, for generating after receiving degassing tempering tower absorption tail gas
Dilute hydrochloric acid.The downstream of the net tower of extraction is equipped with the hydrochloric acid tank for connecing and being stored back to and receiving hydrochloric acid.The downstream on second level ceramic ring absorption tower is also
Equipped with lye absorption tower, for further absorbing remaining chlorine residue and hydrogen chloride gas and emission, the lye absorption tower
Height be >=25m.
Embodiment 2
The technique that HCl recovery is carried out using the HCl recovery equipment in chlorinated paraffin production process described in embodiment 1, such as Fig. 1
It is shown, it comprises the following steps that
1) three-level is checked on: the chlorinated paraffin production tail gas in engine manifold is acted on by cyclone separator, and a part is sent back to chlorine
To change kettle and participates in chlorination reaction again, another part is admitted to kettle of checking on, it is checked on after absorption by three-level kettle of checking on, the paraffin of liquid phase
It is sent back to chlorination tank chlorination again, the tail gas containing a small amount of chlorine residue and hydrogen chloride gas enters film-falling absorption tower, this three are checked on
The wax oil of certain volume is filled within kettle, temperature in the kettle control is 100 DEG C, and pressure is normal pressure.
2) stage falling-film recycles: entering stage falling-film absorption tower through the tail gas that three-level is checked in step 1), carries out falling liquid film suction
It receives, obtains hydrochloric acid crude product I.
3) net extraction processing: the hydrochloric acid crude product I obtained in step 2 being introduced and extracts the net extraction processing of net tower progress, net extraction processing
The wax oil on upper layer, which enters the second level that wax oil recycling can is transmitted back in step 1), checks on to check on again in kettle and separates its liquid phase, lower layer
Hydrochloric acid product is directly recovered in hydrochloric acid tank.
4) second level falling liquid film recycles: the gas in step 2 after stage falling-film absorption tower absorbs enters second level film-falling absorption tower
Falling film absorption again obtains hydrochloric acid crude product II, and hydrochloric acid crude product II flows back to stage falling-film absorption tower, then repeatedly step 3),
Realize the recycling of second level falling liquid film.
5) level-one ceramic ring recycles: level-one ceramic ring packed tower is passed through through step 4) second level falling liquid film tail gas after the recovery, through level-one
The recycling of ceramic ring packed tower obtains hydrochloric acid crude product III, flows back to second level film-falling absorption tower, then flows back to stage falling-film absorption tower, then weigh
Multiple step 3) realizes the recycling of level-one ceramic ring.
6) second level ceramic ring recycles: the tail gas recycled through step 5) level-one ceramic ring is passed through second level ceramic ring packed tower and further absorbs
Purification, resulting hydrochloric acid crude product IV flow back to level-one ceramic ring packed tower through dilute acid bath, then flow back to one through second level film-falling absorption tower
Grade film-falling absorption tower, repeats step 3), realizes the recycling of second level ceramic ring；Hydrochloric acid crude product IV in the dilute hydrochloric acid slot includes warp
Degassing tempering tower absorbs the dilute hydrochloric acid generated after tail gas.
7) alkali suction is put: the tail gas recycled through second level ceramic ring in step 6) is passed through lye absorption tower again, through lye absorption tower
In the high altitude discharge of 25m or more after absorption.
After the present invention checks on the chlorine residue in Chlorcosane tail gas by kettle of checking on, the level-one drop through stage falling-film absorption tower
Film recycling, the second level falling liquid film recycling of second level film-falling absorption tower, the level-one ceramic ring recycling of level-one ceramic ring packed tower and second level ceramic ring are filled out
Expect the crash recycling such as the second level ceramic ring recycling of tower, and carry out net extraction processing by extracting net tower, as far as possible by Chlorcosane tail gas
In chlorine residue and absorbing hydrogen chloride gas recycling, the dilute hydrochloric acid can be used as other technical hydrochloric acids, realize resource recycling, In
On the basis of not increasing purification cost, the income of enterprise, with good economic efficiency and use value are increased.
Claims (10)
1. the HCl recovery technique in a kind of chlorinated paraffin production process, it is characterised in that: comprise the following steps that
1) three-level is checked on: the chlorinated paraffin production tail gas in engine manifold is acted on by cyclone separator, and a part is sent back to chlorine
To change kettle and participates in chlorination reaction again, another part is admitted to kettle of checking on, it is checked on after absorption by three-level kettle of checking on, the paraffin of liquid phase
It is sent back to chlorination tank chlorination again, the tail gas containing a small amount of chlorine residue and hydrogen chloride gas enters film-falling absorption tower；
2) stage falling-film recycles: entering stage falling-film absorption tower through the tail gas that three-level is checked in step 1), carries out falling film absorption, obtain
Obtain hydrochloric acid crude product I；
3) net extraction processing: the hydrochloric acid crude product I obtained in step 2 being introduced and extracts the net extraction processing of net tower progress, net extraction processing upper layer
Wax oil enter the second level that wax oil recycling can is transmitted back in step 1) and check on to check on again in kettle and separate its liquid phase, the hydrochloric acid of lower layer
Product is directly recovered in hydrochloric acid tank；
4) second level falling liquid film recycles: the gas in step 2 after stage falling-film absorption tower absorbs enters second level film-falling absorption tower again
Falling film absorption obtains hydrochloric acid crude product II, and hydrochloric acid crude product II flows back to stage falling-film absorption tower, then repeatedly step 3), realizes
The recycling of second level falling liquid film；
5) level-one ceramic ring recycles: level-one ceramic ring packed tower is passed through through step 4) second level falling liquid film tail gas after the recovery, through level-one ceramic ring
Packed tower recycling obtains hydrochloric acid crude product III, flows back to second level film-falling absorption tower, then flows back to stage falling-film absorption tower, repeats step
It is rapid 3), realize level-one ceramic ring recycling；
6) second level ceramic ring recycles: the tail gas recycled through step 5) level-one ceramic ring is passed through second level ceramic ring packed tower and further absorbs only
Change, resulting hydrochloric acid crude product IV flows back to level-one ceramic ring packed tower through dilute acid bath, then flows back to level-one through second level film-falling absorption tower
Film-falling absorption tower repeats step 3), realizes the recycling of second level ceramic ring；
7) alkali suction is put: the tail gas recycled through second level ceramic ring in step 6) is passed through lye absorption tower again, absorbs through lye absorption tower
Afterwards in the high altitude discharge of 25m or more.
2. the HCl recovery technique in chlorinated paraffin production process according to claim 1, it is characterised in that: in step 1)
Three-level kettle of checking on is that check on kettle, second level of level-one checks on kettle and three-level is checked on kettle, fills one within three kettles of checking on
Determine the wax oil of volume, temperature in the kettle control is 80~120 DEG C, and pressure is normal pressure.
3. the HCl recovery technique in chlorinated paraffin production process according to claim 1, it is characterised in that: in step 6)
Hydrochloric acid crude product IV in the dilute hydrochloric acid slot includes that degassed tempering tower absorbs the dilute hydrochloric acid generated after tail gas.
4. the HCl recovery equipment in a kind of chlorinated paraffin production process, it is characterised in that: including kettle of checking on, film-falling absorption tower,
Extract net tower and ceramic ring packed tower；
The kettle of checking on includes that check on kettle, second level of level-one checks on kettle and three-level is checked on kettle, and gas-liquid is two-way between three kettles of checking on
Connection；
The film-falling absorption tower includes stage falling-film absorption tower and second level film-falling absorption tower, the stage falling-film absorption tower and three-level
Kettle gas phase of checking on connects, gas-liquid diconnected between two film-falling absorption tower；
The net tower of extraction is connected to the downstream on stage falling-film absorption tower, is used for further extraction and recovery hydrochloric acid product；
The ceramic ring packed tower includes level-one ceramic ring packed tower and second level ceramic ring packed tower, the level-one ceramic ring packed tower and second level
Film-falling absorption tower gas-liquid diconnected, also gas-liquid diconnected between the second level ceramic ring packed tower and level-one ceramic ring packed tower.
5. the HCl recovery equipment in chlorinated paraffin production process according to claim 4, it is characterised in that: described one
Grade film-falling absorption tower is inhaled and second level film-falling absorption tower is countercurrent falling-film absorption tower.
6. the HCl recovery equipment in chlorinated paraffin production process according to claim 4, it is characterised in that: the extraction is net
Tower is weight packed extraction tower.
7. the HCl recovery equipment in chlorinated paraffin production process according to claim 4, it is characterised in that: further include rotation
Wind separator is located at level-one and checks on the upstream of kettle, and the tail gas for will generate in chlorinated paraffin production process is from engine manifold
It is middle to be sent into kettle of checking on.
8. the HCl recovery equipment in chlorinated paraffin production process according to claim 4, it is characterised in that: the level-one
The branch road that ceramic ring packed tower is connect with second level film-falling absorption tower liquid phase is additionally provided with dilute hydrochloric acid slot, inhales for receiving degassing tempering tower
The dilute hydrochloric acid generated after ending gas.
9. the HCl recovery equipment in chlorinated paraffin production process according to claim 4, it is characterised in that: the extraction is net
The downstream of tower is equipped with the hydrochloric acid tank for connecing and being stored back to and receiving hydrochloric acid.
10. the HCl recovery equipment in chlorinated paraffin production process according to claim 4, it is characterised in that: described two
The downstream on grade ceramic ring absorption tower is additionally provided with lye absorption tower, for further absorbing remaining chlorine residue and hydrogen chloride gas and discharging
Tail gas, the height on the lye absorption tower are >=25m.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068465A (en) * | 2019-12-30 | 2020-04-28 | 山东旭锐新材有限公司 | Continuous absorption method for byproduct hydrogen chloride gas in chlorination reaction |
| CN111298603A (en) * | 2020-03-12 | 2020-06-19 | 江苏维尤纳特精细化工有限公司 | Hydrogen chloride detection processing equipment for chlorothalonil production line and processing technology thereof |
| CN114717024A (en) * | 2022-03-10 | 2022-07-08 | 丹阳市助剂化工厂有限公司 | Preparation method of novel environment-friendly chlorinated paraffin |
| CN117563393A (en) * | 2024-01-15 | 2024-02-20 | 潍坊春源化工有限公司 | Combined process and device for removing and purifying impurities containing free chlorine in hydrogen chloride |
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| CN111298603A (en) * | 2020-03-12 | 2020-06-19 | 江苏维尤纳特精细化工有限公司 | Hydrogen chloride detection processing equipment for chlorothalonil production line and processing technology thereof |
| CN114717024A (en) * | 2022-03-10 | 2022-07-08 | 丹阳市助剂化工厂有限公司 | Preparation method of novel environment-friendly chlorinated paraffin |
| CN117563393A (en) * | 2024-01-15 | 2024-02-20 | 潍坊春源化工有限公司 | Combined process and device for removing and purifying impurities containing free chlorine in hydrogen chloride |
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