CN108926961A - A kind of hydrogen chloride water washing cycles absorption system and its application - Google Patents
A kind of hydrogen chloride water washing cycles absorption system and its application Download PDFInfo
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- CN108926961A CN108926961A CN201810827380.4A CN201810827380A CN108926961A CN 108926961 A CN108926961 A CN 108926961A CN 201810827380 A CN201810827380 A CN 201810827380A CN 108926961 A CN108926961 A CN 108926961A
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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
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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
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
Abstract
The present invention provides a kind of hydrogen chloride water washing cycles absorption system and its applications.The system includes that sequentially connected hydrochloric acid desorption system and water wash system are intake, by absorption by Hydrochloric Acid system outlet qualification acid solution wherein the absorbing liquid circulating and recovering of the water wash system is the spray liquid of the absorption by Hydrochloric Acid system by water wash system.Hydrogen chloride water washing cycles absorption system of the invention, it is higher level's spray liquid by the way that junior is recycled acid solution outer circulation, only in absorption by Hydrochloric Acid system one end outlet qualification acid solution, it only intakes and feeds in water wash system one end, simultaneously by on-line monitoring and automatic regulating valve Automatic Control liquid level and spray flow, so that outlet acid strength concentration is 31%0.5, the fluctuation of concentration of hydrochloric acid is small, and hydrochloric acid detects 98% or more first-time qualification rate, not only increases efficiency, avoids many places valve switch, improves production security and product stability, realizes full-automatic continuous acid out.
Description
Technical field
The present invention relates to hydrogen chloride recovery technology fields, more particularly, to a kind of hydrogen chloride water washing cycles absorption system
And its application.
Background technique
Contain hydrogen chloride gas in the cracked gas generated in vinylidene (VDF) production process, it usually needs washing, alkali
It washes to remove the hydrochloric acid by-product of hydrogen chloride gas and recycling 31%, includes that there are two hydrochloric acid to inhale in existing production recovery system
A grade hydrochloric acid heat exchanger, the two grade hydrochloric acid heat exchangers, three hydrochloric acid cyclic absorption storage tank V2105A, V2105AB, V2105AC received,
Two water scrubber T2101, T2102, a caustic wash tower T2103, cyclic absorption process flow as shown in Figure 1, V2105B,
V2105AC, T2101, T2102 processing industry water, T2103 add lye to absorb the hydrogen chloride in cracking gas by pump circulation respectively, when
The hydrochloric acid in V2105B is transferred to the interim storage tank of V2105A(when concentration of hydrochloric acid in V2105B reaches 31%) or it is directly outer
It send, the dilute hydrochloric acid in T2102 is transferred to T2101, and the dilute hydrochloric acid in T2101 is transferred to V2105C, and the dilute hydrochloric acid in V2105C turns
Move to V2105B.But above-mentioned hydrochloric acid cyclic absorption process flow has the disadvantage that (1) efficiency is lower, cumbersome: every time
It sends outside and needs diluted acid in successively transfer system after hydrochloric acid and add to add industry water, operation needs half an hour or more；(2) hydrochloric acid
Fluctuation of concentration is larger: after judging the concentration of hydrochloric acid according to the height that liquid level in V2105B rises, sampling analysis, exist it is very big not
Certainty, often occur concentration it is too low or too it is high need to repeat sample the problems such as；(3) hydrochloric acid valve is frequently operated, is easily caused
Hydrochloric acid leakage, there are biggish security risks.
Therefore it provides a kind of safe and efficient and stable hydrogen chloride gas circulation absorption system has very important meaning
Justice.
Summary of the invention
The technical problem to be solved by the present invention is to overcome acid solution and spray are recycled in existing hydrogen chloride gas circulation absorption system
Leaching liquid is circulation in single-stage, needs many places transfer recycling acid solution and supply spray liquid water, recovery efficiency is low and recycling acid solution is dense
The defects of unstable and deficiency are spent, a kind of hydrogen chloride water washing cycles absorption system is provided, by the way that junior is recycled acid solution outer circulation
For the spray liquid of higher level's absorption system, the circulation concentration of absorbing liquid is reached, one end is only needed to shift acid solution, one end feeds spray liquid
Water not only increases efficiency and avoids many places valve switch, improves production security and product stability.
Another object of the present invention is to provide a kind of hydrogen chloride water washing cycles absorption systems in fluorochemical monomer cracking system
In application.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of hydrogen chloride water washing cycles absorption system, the system comprises sequentially connected absorption by Hydrochloric Acid system and water wash system,
Wherein the absorbing liquid circulating and recovering of the water wash system is the spray liquid of the absorption by Hydrochloric Acid system, is intake by water wash system, by
Absorption by Hydrochloric Acid system outlet qualification acid solution.
The absorption liquid that existing water washing cycles absorb every primary system only recycles in single-stage, and the acid solution of absorption is continuous
Circulation is the same level spray liquid, and acid solution transfers to acid mouth outlet after reaching a certain concentration, and every grade of absorption system is both needed to examine acid
Liquid concentration is simultaneously constantly supplemented in water, and the sour sample that goes out of mixing at different levels also has great fluctuation, influences the stabilization of final products
Property, and repeatedly for inspection acid strength there are very big security risk, many places moisturizing also increases workload, reduces working efficiency.
In hydrogen chloride water washing cycles system of the invention, the flow direction of hydrogen chloride gas are as follows: air inlet-absorption by Hydrochloric Acid system
System-water wash system, the flow direction of spray liquid are as follows: water inlet-water wash system-absorption by Hydrochloric Acid system is only mended by one end of water wash system
To water inlet, absorb to obtain dilute hydrochloric acid by water wash system, dilute hydrochloric acid liquid is further back to absorption by Hydrochloric Acid system, absorption by Hydrochloric Acid
The qualified acid solution that system absorbs can outlet recycling, it is only necessary to detect absorption by Hydrochloric Acid system one end go out acid concentration,
The stability of hydrochloric acid solution concentration has a guarantee, and water inlet also only needs water wash system one end to intake, very big to reduce workload, slows down
Security risk.
Preferably, the inlet end of the absorption by Hydrochloric Acid system is equipped with hydrogen chloride content detector, and liquid feeding ends at different levels are equipped with
Automatic control adjustable valve adjusts spray flow, spray flow Y=X of the absorption by Hydrochloric Acid systems at different levels10.31 × 0.69 ÷ (1-X of ÷2), wherein
X1For absorption by Hydrochloric Acid system air inlet hydrogen chloride flow, X2For spray liquid concentration of hydrochloric acid.
According to the spray flow that the measurement data absorption by Hydrochloric Acid system of online hydrogen chloride content detector needs, pass through automatic control
Regulating valve controls spray flow, is equal to acid mouth according to the amount that hydrogen chloride conservation generates hydrogen chloride per hour and generates hydrochloric acid per hour
The amount of institute's containing hydrogen chloride reaches material balance state, and realization device automatically dissolves acid, and the concentration of hydrochloric acid of acid mouth can be tieed up
0.31 is held in 31% ± 0.5, spray flow calculation formula as the hydrogen chloride content 31% of qualified hydrochloric acid, 0.69 is qualified hydrochloric acid water
Content 69%.
Preferably, the series of the absorption by Hydrochloric Acid system is more than or equal to 2, and the absorbing liquid of next stage absorption by Hydrochloric Acid system is followed
The loopback spray liquid for being upper level absorption by Hydrochloric Acid system, the next stage absorption by Hydrochloric Acid system are connect with water wash system.Relatively
The absorptivity of hydrogen chloride gas can be improved in single-stage absorption system, multistage absorption.
Preferably, the series of the water wash system is more than or equal to 2, and the equal circulating and recovering of the absorbing liquid of next stage water wash system is
The spray liquid of upper level water wash system, the upper level water wash system connect with the absorption by Hydrochloric Acid system, are washed by next stage
System water inlet.
Preferably, the absorption by Hydrochloric Acid system includes level-one absorption by Hydrochloric Acid system and second level absorption by Hydrochloric Acid system, second level salt
The absorbing liquid circulating and recovering of sour absorption system is the spray liquid of level-one absorption by Hydrochloric Acid system, the second level absorption by Hydrochloric Acid system and water
Wash system connection.Second level absorption by Hydrochloric Acid system is substantially complete hydrogen chloride absorption, and remaining a small amount of hydrogen chloride water wash system absorbs
, setting second level absorption system can not only guarantee assimilation effect, but also take into account industrial economy effect selection.
Preferably, the water wash system includes one-stage water wash system and second level water wash system, the absorption of second level water wash system
Liquid circulating and recovering is the spray liquid of one-stage water wash system, and the one-stage water wash system is connect with second level absorption by Hydrochloric Acid system, by institute
State the water inlet of second level water wash system.
Preferably, the spray liquid concentration of the level-one absorption by Hydrochloric Acid system is 25%, the spray of the second level absorption by Hydrochloric Acid system
Drenching liquid concentration is 20%.Because the absorbing liquid assimilation effect of various concentration is different, by the spray for controlling absorption by Hydrochloric Acid systems at different levels
Concentration can guarantee that entire absorption system and water wash system are in equilibrium state, according to hydrogen chloride conservation total in system, guarantee
Whole hydrogen chloride absorptions are complete.
Preferably, regulating valve is provided on the water wash system, the liquid level of water wash system is 70%, and two grade hydrochloric acid is inhaled
The spray liquid liquid storage liquid level of receipts system is 50%.It is provided on second level water wash system and adds water regulating valve, control second level water wash system
Liquid level is 70%, and second level water wash system is provided on turn sour route that water lotion turns one-stage water wash system turns a sour regulating valve, control
The liquid level of one-stage water wash system is 70%, and preferably above-mentioned regulating valve is preferably automatic regulating valve.In the washing acid of one-stage water wash system
Liquid transfer is provided on turn sour route for the spray liquid of second level absorption by Hydrochloric Acid system turns a sour regulating valve, control second level absorption by Hydrochloric Acid
The liquid level of system is 50%, and turning sour regulating valve is preferably automatic regulating valve.
Because the quality of entire water wash system and absorption system water is conservation, water wash system adds the quality etc. of water per hour
In generating the quality containing water in 31% concentration hydrochloric acid in acid mouth per hour, the purpose for controlling liquid level is to guarantee whole system
Water material balance takes into account production safety and guarantees that system is stablized.
Preferably, the hydrogen chloride water washing cycles absorption system include sequentially connected level-one absorption by Hydrochloric Acid system (S3A),
Second level absorption by Hydrochloric Acid system (S3B), one-stage water wash system (T1), second level water wash system (T2), by second level water wash system (T2) into
Water, the absorbing liquid reuse of second level water wash system (T2) are the spray liquid of one-stage water wash system (T1), one-stage water wash system (T1)
Absorbing liquid reuse is the spray liquid of second level absorption by Hydrochloric Acid system (S3B), and the absorbing liquid reuse of second level absorption by Hydrochloric Acid system (S3B) is
The spray liquid of level-one absorption by Hydrochloric Acid system (S3A), qualified acid are discharged by level-one absorption by Hydrochloric Acid system (S3A).
Above-mentioned hydrogen chloride water washing cycles absorption system is in hydrogen chloride absorption: the flow direction of hydrogen chloride gas are as follows: hydrogen chloride gas
Body is entered by the air inlet of level-one absorption by Hydrochloric Acid system, enters second level absorption by Hydrochloric Acid system after the absorption of level-one absorption by Hydrochloric Acid system
It absorbs, one-stage water wash system is entered after the absorption of second level absorption by Hydrochloric Acid system, one-stage water wash system enters second level after absorbing and washes
System absorbs the flow direction of spray liquid are as follows: is intake by second level water wash system water inlet, enters level-one after coming out from second level water wash system
For water wash system as spray liquid, one-stage water wash system enters second level absorption by Hydrochloric Acid system as spray liquid, two grade hydrochloric acids after coming out
Absorption system enters level-one absorption by Hydrochloric Acid system as spray liquid after coming out, level-one absorption by Hydrochloric Acid obtains qualified acid after attracting absorption
Liquid outlet, acid solution only pass through the outlet mouth discharge of level-one absorption by Hydrochloric Acid system, are only intake by second level water wash system.
Hydrogen chloride water absorption system of the invention is because of the supreme first order absorption system of acid solution outer circulation reuse, water wash system
Hydrogen chloride gas will not be volatilized because acid strength increases, also not need to connect corresponding alkali behind water wash system again
System is washed, industrial process stream line can be greatly reduced, space needed for reducing recovery system is more economical efficient.
Full-automatic tune may be implemented by liquid level automatic regulating valves at different levels and hydrogen chloride content on-line detector in the present invention
Section.
A kind of application of above-mentioned hydrogen chloride water washing cycles absorption system in fluorochemical monomer cracking system.Chlorination of the invention
The hydrogen chloride gas that hydrogen water washing cycles absorption system can be applied to a variety of fluorochemical monomer cracking systems for generating hydrogen chloride gas returns
It receives, fluorochemical monomer cracking can be vinylidene cracking etc..
Compared with prior art, the beneficial effects of the present invention are:
The present invention provides a kind of hydrogen chloride water washing cycles absorption systems, by the way that junior is recycled acid solution outer circulation as higher level's spray
Liquid is only intake in water wash system one end and is fed only in absorption by Hydrochloric Acid system one end outlet qualification acid solution, while passing through on-line monitoring
With automatic regulating valve Automatic Control liquid level and spray flow so that outlet acid strength concentration is 31%0.5, the concentration wave of hydrochloric acid
Move it is small, hydrochloric acid detect 98% or more first-time qualification rate, not only increase efficiency, avoid many places valve switch, improve production peace
Full property and product stability realize full-automatic continuous acid out.
Detailed description of the invention
Fig. 1 is water washing cycles absorption technique flow chart.
Fig. 2 is the continuous process flow chart sour out of washing.
Specific embodiment
The present invention is further illustrated With reference to embodiment, but embodiment the present invention is not done it is any
The restriction of form.Unless otherwise indicated, source chemicals used in the embodiment of the present invention are the source chemicals routinely bought.
Embodiment 1
A kind of hydrogen chloride water washing cycles absorption system, as shown in Fig. 2, including level-one absorption by Hydrochloric Acid system S3A, second level absorption by Hydrochloric Acid
System S3B, level-one absorption by Hydrochloric Acid system acid receiver V4A and V5A, second level absorption by Hydrochloric Acid system acid receiver V4B and V5B, second level salt
Sour absorption system spray liquid liquid storage device V5C, one-stage water wash system T1, second level water wash system T2, second level water wash system add water to adjust
Turn sour regulating valve F3 for turning sour regulating valve F2, one-stage water wash system to V5C of valve F1, second level water scrubber to one-stage water wash system,
The spray flow tune of the spray flow regulating valve and flowmeter F4 of level-one absorption by Hydrochloric Acid system S3A, second level absorption by Hydrochloric Acid system S3A
It saves valve and flowmeter F5, hydrogen chloride monitors device F6 on-line,
Level-one absorption by Hydrochloric Acid system S3A, second level absorption by Hydrochloric Acid system S3B, one-stage water wash system T1, second level water wash system T2 is successively
Connection, the acid solution after S3A absorbs are emitted into V4A, excessive to V5A from V4A, obtain qualified acid solution from V5A outlet after detection is qualified,
Liquid after S3B absorbs is emitted into V4B, excessive to V5B from V4B, is pumped to S3A as spray liquid, to absorb from T1 conveying
Liquid is stored in V5C, is pumped to S3B by V5C, the absorption liquid of T2 is pumped directly to T1.
Level-one absorption by Hydrochloric Acid system S3A's.Wherein P indicates associated pump.
In hydrogen chloride absorption:
The flow direction of hydrogen chloride gas are as follows: S3A-S3B-T1-T2, hydrogen chloride gas by level-one absorption by Hydrochloric Acid system air inlet into
Enter, enter second level absorption by Hydrochloric Acid system after the absorption of level-one absorption by Hydrochloric Acid system and absorb, after the absorption of second level absorption by Hydrochloric Acid system
Into one-stage water wash system, one-stage water wash system enters second level water wash system after absorbing.
Absorb spray liquid flow direction are as follows: T2-T1-V5C-S3B-V4B-V5B-S3A-V4A-V5A, by second level water wash system into
Mouth of a river water inlet enters one-stage water wash system as spray liquid after coming out from second level water wash system, one-stage water wash system is laggard out
Enter second level absorption by Hydrochloric Acid system as spray liquid, second level absorption by Hydrochloric Acid system enters level-one absorption by Hydrochloric Acid system as spray after coming out
Liquid is drenched, level-one absorption by Hydrochloric Acid obtains qualified acid solution outlet after attracting absorption.
When opening two pyrolysis furnaces, processing industry water regulating valve automatic control T2 liquid level 70%, T2 to T1 turns sour regulating valve automatic control T1 liquid
Position 70%, T1 to V5C turns acid regulating valve automatic control V5C liquid level 50%.It is cracked according to the measurement data of online hydrogen chloride content detector
Hydrogen chloride content is 29% in gas0.2, the inventory of every pyrolysis furnace is 180 ~ 190kg/h, so the chlorination of every pyrolysis furnace
Hydrogen by-product amount is 52.2 ~ 55.1Kg/h, is repeatedly analyzed that measure the concentration gradient of V5A, V5B, V5C be about 31%, 25%, 20%, meter
Calculate S3A spray flow are as follows: 52.2 × 2 ÷, 0.31 × 0.69 0.31 × 0.69 ÷ of ÷ 0.75=309.8kg/h, 55.1 × 2 ÷
0.75=327kg/h, thus according to the total amount of feeding of two pyrolysis furnaces by regulating valve automatic control S3A spray flow 309.8 ~
327kg/h.Calculate the spray flow of S3B is 52.2 × 2 ÷, 0.31 × 0.69 ÷ 0.8=290.5kg/h, 55.1 × 2 ÷ 0.31 ×
0.69 0.8=306.6kg/h of ÷, so passing through regulating valve automatic control S3B spray flow according to the total amount of feeding of two pyrolysis furnaces
290.5~306.6kg/h.By prolonged operating analysis, the concentration of hydrochloric acid in V5A is 31%It is not detected in 0.5 or so, T2
Contain hydrochloric acid out, is able to achieve full-automatic continuous acid out.
Embodiment 2
When opening three pyrolysis furnaces, processing industry water regulating valve automatic control T2 liquid level 70%, T2 to T1 turns sour regulating valve automatic control T1 liquid level
70%, T1 to V5C turn acid regulating valve automatic control V5C liquid levels 50%.According to the measurement data cracking gas of online hydrogen chloride content detector
Middle hydrogen chloride content is 29%0.2, the inventory of every pyrolysis furnace is 180 ~ 190kg/h, so the hydrogen chloride of every pyrolysis furnace
By-product amount is 52.2 ~ 55.1Kg/h, is repeatedly analyzed that measure the concentration gradient of V5A, V5B, V5C be about 31%, 25%, 20%, is calculated
S3A spray flow be 52.2 × 3 ÷, 0.31 × 0.69 0.31 × 0.69 ÷ 0.75 of ÷ 0.75=464.8kg/h, 55.1 × 3 ÷=
490.6kg/h, so passing through 464.8 ~ 490.6kg/ of regulating valve automatic control S3A spray flow according to the total amount of feeding of three pyrolysis furnaces
h.Calculate S3B spray flow be 52.2 × 3 ÷, 0.31 × 0.69 0.31 × 0.69 ÷ of ÷ 0.8=435.7kg/h, 55.1 × 3 ÷
0.8=459.9kg/h, thus according to the total amount of feeding of three pyrolysis furnaces by regulating valve automatic control S3B spray flow 435.7 ~
459.9kg/h., by prolonged operating analysis, the concentration of hydrochloric acid in V5A is 31%Do not detected in 0.5 or so, T2 containing
Hydrochloric acid is able to achieve full-automatic continuous acid out.
Embodiment 3
When opening four pyrolysis furnaces, processing industry water regulating valve automatic control T2 liquid level 70%；T2 to T1 turns sour regulating valve automatic control T1 liquid level
70%, T1 to V5C turn acid regulating valve automatic control V5C liquid levels 50%.According to the measurement data cracking gas of online hydrogen chloride content detector
Middle hydrogen chloride content is 29%0.2, the inventory of every pyrolysis furnace is 180 ~ 190kg/h, so the hydrogen chloride of every pyrolysis furnace
By-product amount is 52.2 ~ 55.1Kg/h, is repeatedly analyzed that measure the concentration gradient of V5A, V5B, V5C be about 31%, 25%, 20%, is calculated
S3A spray flow be 52.2 × 4 ÷, 0.31 × 0.69 0.31 × 0.69 ÷ 0.75 of ÷ 0.75=619.6kg/h, 55.1 × 4 ÷=
654.1kg/h, so passing through 619.6 ~ 654.1kg/ of regulating valve automatic control S3A spray flow according to the total amount of feeding of four pyrolysis furnaces
h.Calculate S3B spray flow are as follows: 52.2 × 4 ÷ 0.31 × 0.69 ÷ 0.8=580.9kg/h, 55.1 × 4 ÷ 0.31 × 0.69
0.8=613.2kg/h of ÷, thus according to the total amount of feeding of four pyrolysis furnaces by regulating valve automatic control S3B spray flow 580.9 ~
613.2kg/h；, by prolonged operating analysis, the concentration of hydrochloric acid in V5A is 31%Do not detected in 0.5 or so, T2 containing
Hydrochloric acid is able to achieve full-automatic continuous acid out.
Illustrated according to three examples, passes through the spray flow energy of regulating valve automatic control S3A and S3B according to the quantity for opening stove
Realize the hydrochloric acid of full-automatic continuous 31% concentration out, it is quick that operation is very easy, greatly reduces the operation frequency of hydrochloric acid system
Rate and operating time effectively reduce the risk that employee is hurt, and the fluctuation of concentration of hydrochloric acid is small, and hydrochloric acid detection is primary to close
98% or more lattice rate.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. a kind of hydrogen chloride water washing cycles absorption system, which is characterized in that the system comprises sequentially connected absorption by Hydrochloric Acid systems
System and water wash system, wherein the absorbing liquid circulating and recovering of the water wash system is the spray liquid of the absorption by Hydrochloric Acid system, by water
System water inlet is washed, by absorption by Hydrochloric Acid system outlet qualification acid solution.
2. hydrogen chloride water washing cycles absorption system as described in claim 1, which is characterized in that the air inlet of the absorption by Hydrochloric Acid system
End is equipped with hydrogen chloride content detector, and liquid feeding ends at different levels are equipped with automatic control adjustable valve and adjust spray flow, the absorption by Hydrochloric Acid at different levels
Spray flow Y=X of system10.31 × 0.69 ÷ (1-X of ÷2), wherein X1For absorption by Hydrochloric Acid system air inlet hydrogen chloride flow, X2For spray
Drench salt solution acid concentration.
3. hydrogen chloride water washing cycles absorption system as described in claim 1, which is characterized in that the series of the absorption by Hydrochloric Acid system
More than or equal to 2, the equal circulating and recovering of absorbing liquid of next stage absorption by Hydrochloric Acid system is the spray liquid of upper level absorption by Hydrochloric Acid system, institute
Next stage absorption by Hydrochloric Acid system is stated to connect with water wash system.
4. hydrogen chloride water washing cycles absorption system as described in claim 1, which is characterized in that the series of the water wash system is greater than
Equal to 2, the equal circulating and recovering of the absorbing liquid of next stage water wash system is the spray liquid of upper level water wash system, the upper level washing
System is connect with the absorption by Hydrochloric Acid system, is intake by next stage water wash system.
5. hydrogen chloride water washing cycles absorption system as claimed in claim 3, which is characterized in that the absorption by Hydrochloric Acid system include according to
The level-one absorption by Hydrochloric Acid system and second level absorption by Hydrochloric Acid system of secondary connection, the absorbing liquid circulating and recovering of second level absorption by Hydrochloric Acid system are
The spray liquid of level-one absorption by Hydrochloric Acid system, the second level absorption by Hydrochloric Acid system are connect with water wash system.
6. hydrogen chloride water washing cycles absorption system as claimed in claim 5, which is characterized in that the water wash system includes successively connecting
The one-stage water wash system and second level water wash system connect, the absorbing liquid circulating and recovering of second level water wash system are the spray of one-stage water wash system
Liquid is drenched, the one-stage water wash system is connect with second level absorption by Hydrochloric Acid system, is intake by the second level water wash system.
7. hydrogen chloride water washing cycles absorption system as claimed in claim 5, which is characterized in that the level-one absorption by Hydrochloric Acid system
Spray liquid concentration is 25%, and the spray liquid concentration of the second level absorption by Hydrochloric Acid system is 20%.
8. hydrogen chloride water washing cycles absorption system as claimed in claim 5, which is characterized in that the liquid level of the water wash system is
70%, the spray liquid liquid storage liquid level of the second level absorption by Hydrochloric Acid system is 50%.
9. hydrogen chloride water washing cycles absorption system as described in claim 1, which is characterized in that including a sequentially connected grade hydrochloric acid
Absorption system (S3A), second level absorption by Hydrochloric Acid system (S3B), one-stage water wash system (T1), second level water wash system (T2), by second level
Water wash system (T2) water inlet, the absorbing liquid reuse of second level water wash system (T2) are the spray liquid of one-stage water wash system (T1), level-one
The absorbing liquid reuse of water wash system (T1) is the spray liquid of second level absorption by Hydrochloric Acid system (S3B), second level absorption by Hydrochloric Acid system (S3B)
Absorbing liquid reuse be level-one absorption by Hydrochloric Acid system (S3A) spray liquid, qualified acid arranged by level-one absorption by Hydrochloric Acid system (S3A)
Out.
10. such as any one of claim 1 ~ 9 hydrogen chloride water washing cycles absorption system the answering in fluorochemical monomer cracking system
With.
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| CN207102257U (en) * | 2017-12-09 | 2018-03-16 | 鄂尔多斯应用技术学院 | A kind of chlorination reaction tail gas absorption processing unit |
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