CN206688465U - One kind recovery contains SO2, HCl tail gas device - Google Patents
One kind recovery contains SO2, HCl tail gas device Download PDFInfo
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- CN206688465U CN206688465U CN201720268169.4U CN201720268169U CN206688465U CN 206688465 U CN206688465 U CN 206688465U CN 201720268169 U CN201720268169 U CN 201720268169U CN 206688465 U CN206688465 U CN 206688465U
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Abstract
One kind recovery contains SO2, HCl tail gas device, the device according to processing sequence successively include connection：Absorption plant, absorption plant include at least first grade absorption tower, adsorbing tower with molecular sieve charging aperture connection first order absorption tower tower reactor, HCl rectifying columns connection adsorbing tower with molecular sieve discharging opening, SO2 rectifying columns connection HCl tower bottom of rectifying tower, SO2Tower bottom of rectifying tower is connected with absorbent surge tank.The utility model tail gas clean-up rate is high, HCl and SO2The rate of recovery it is high, absorbent is repeatable to be utilized, and is avoided the environmental pollution of discharge, is reduced production cost, improves economic benefit.
Description
Technical field
It the utility model is related to a kind of recovery and contain SO2, HCl tail gas device, the material isolation technics belonged in chemical industry
Field.
Background technology
Contain SO2It is common in HCl mixed gas in the production process of pharmaceutical intermediate, for example thionyl chloride decomposes instead
Ying Zhonghui produces a large amount of SO2, HCl gases, the mixed gas excitant is big, corrosivity is strong, it is necessary to recycled, otherwise right
Environment causes greatly to endanger.
The method absorption process and freezing industrially more commonly used both at home and abroad at present.Absorption process absorbs gaseous mixture using water
HCl in body, but due to SO2The certain solubility also having in water, therefore water absorbs and often contained in the hydrochloric acid that HCl is formed
Mass fraction is 1% or so SO2, excitant is very big, can not subsequently be comprehensively utilized.Freezing utilizes SO under low temperature2Yi Leng
The characteristics of solidifying, is separated after mixed gas is cooled, but SO2Condensation temperature is less than -10 DEG C, it is necessary to which additionally refrigeration is divided
From；Single condensation separation effect is undesirable, it is necessary to which multi-stage separation, equipment investment and operating cost are all higher simultaneously.
Utility model content
The utility model contains SO in view of the deficienciess of the prior art, providing a kind of recovery2, HCl tail gas device.
Wherein, a kind of technical scheme of the utility model solution above-mentioned technical problem is as follows, and one kind recovery contains SO2、HCl
The device of tail gas, the device include connection successively according to processing sequence：
Absorption plant, absorption plant include absorption tower, the top exit of the absorption tower tower reactor connection gas-liquid filteration device；
Adsorbing tower with molecular sieve, adsorbing tower with molecular sieve charging aperture connection absorption tower tower reactor；
HCl rectifying columns, HCl rectifying columns connection adsorbing tower with molecular sieve discharging opening；
SO2Rectifying column, SO2 rectifying columns connection HCl tower bottom of rectifying tower, SO2Tower bottom of rectifying tower is connected with absorbent surge tank；
Absorbent in each absorption tower is organic solvent, and the organic solvent can be one kind in many classes, such as alcohol
Class, ketone, esters, ethers and other class organic solvents etc., alcohols include methanol, ethanol, isopropanol, butanol etc., and ketone includes
Acetone, butanone, 2 pentanone etc., esters include Ethyl formate, methyl formate, methyl acetate etc..
To sum up, top of the device using absorption plant as vent gas treatment, using absorption tower and molecular sieve adsorption as pilot process,
With HCl rectifying columns and SO2Rectifying column is terminal, forms a complete procedure of exhaust gas processing device.
Further, the absorption tower is at least one-level；When having multistage absorption tower, the adsorbing tower with molecular sieve connection first order absorbs
Tower, multistage absorption tower are connected in series, previous stage absorption tower tower top connection rear stage absorption tower tower reactor, between adjacent absorption tower by
The pipeline connection circulated back and forth, the absorbent surge tank are connected to afterbody absorption tower by pipeline.
Further, the absorption tower is also connected with gas-liquid filteration device, and effect is to filter out the water and other lime sets in tail gas,
The top exit of gas-liquid filteration device is connected by absorption tower tower reactor, the gas-liquid filteration device is provided with charging aperture, and top is provided with gas
Body exports, and bottom is provided with condensate outlet.
Further, afterbody absorption tower tower top exports provided with fixed gas；The adsorbing tower with molecular sieve is provided with height
Nitrogen inlet is pressed, the molecular sieve of absorption full water point can be purged by high pressure nitrogen, remove the moisture of absorption, realize that molecular sieve is online
Regeneration.
Further, circulating pump and cooler are respectively arranged with each pipeline between the absorption tower tower top and tower reactor.
Further, the HCl tower bottom of rectifying tower is connected with HCl reboilers, and the HCl rectifying towers are top-loaded with HCl tower tops
Condenser, HCl overhead condensers have HCl product surge tanks, and the output end of HCl product surge tanks is connected to HCl rectifying columns
Tower top.
Further, the SO2Tower bottom of rectifying tower is connected with SO2Reboiler, the SO2Rectifying tower is top-loaded with SO2Tower top is cold
Condenser, SO2Overhead condenser has SO2Product surge tank, SO2The output end of product surge tank is connected to SO2Rectifying tower
Top.
Further, solution surge tank is housed on the pipeline between the HCl rectifying columns and adsorbing tower with molecular sieve discharging opening.
Further, the quantity of the adsorbing tower with molecular sieve is no less than one, and multiple adsorbing tower with molecular sieve are installed in parallel, can be same
When using or be used alternatingly.
Further, the HCl products surge tank is followed by absorption drying system.
Further, the SO2Product surge tank is followed by absorption drying system.
Another technical scheme that the utility model solves above-mentioned technical problem is as follows, and one kind recovery contains SO2, HCl tail gas
Method, comprise the following steps：
(1) absorb
Tail gas enters from first order absorption tower tower reactor, and by the absorption on first order absorption tower, saturated solution is transported to molecule
Sieve adsorption tower；
(2) adsorb
Saturated solution removes moisture through adsorbing tower with molecular sieve, and the saturated solution for sloughing moisture is discharged simultaneously from adsorbing tower with molecular sieve
Into HCl rectifying columns；
(3) rectifying
Be pressurized operation in HCl rectifying columns, into transmittance process of the saturated solution in HCl rectifying columns through heat with matter, on
Be raised to tower top gas phase HCl it is condensed obtain liquid phase HCl products, the solution of HCl tower bottom of rectifying tower is transported to SO2In rectifying column；
SO2It is pressurized operation in rectifying column, into SO2Transmittance process of the saturated solution through heat and matter in rectifying column, rises
To the gas phase SO of tower top2It is condensed to obtain liquid phase SO2Product, in SO2Tower bottom of rectifying tower obtains the solution containing absorbent.
Further, tail gas is first separated by filtration before entering first order absorption tower：Tail gas is introduced into gas-liquid filteration device, coagulated
Liquid is discharged from gas-liquid filteration device bottom, containing HCl, SO2Secondary tail gas from gas-liquid filteration device top discharge and from the first order absorb
Tower tower reactor enters.
Further, in step (1), inhaled from the unabsorbed tail gas that first order absorbing tower top row goes out into next stage
Receive tower and eventually enter into afterbody absorption tower；Each on pipeline between the absorption tower tower top and tower reactor equipped with circulating pump and
Cooler, for each absorption tower, solution circulates between cooler through circulating pump in each absorbing tower, in step (3)
In, in SO2The solution containing absorbent that tower bottom of rectifying tower obtains returns to afterbody absorption tower and recycled.
Further, the HCl tower bottom of rectifying tower is connected with HCl reboilers, and the HCl rectifying towers are top-loaded with HCl tower tops
Condenser, HCl overhead condensers have HCl product surge tanks, and HCl product surge tanks are followed by absorption drying system, HCl products
The output end of surge tank is also connected with HCl rectifying column tower tops；The SO2Tower bottom of rectifying tower is connected with SO2Reboiler, the SO2Essence
Evaporate column overhead and SO is housed2Overhead condenser, SO2Overhead condenser has SO2Product surge tank, SO2Product surge tank is followed by inhaling
Attached drying system.SO2The output end of product surge tank is also connected with SO2Rectifying column tower top.
Further, NaOH solution tank NaOH is housed on the pipeline between the HCl rectifying columns and adsorbing tower with molecular sieve discharging opening；The gas
Liquid filter is provided with charging aperture, and top is provided with gas vent, and bottom is provided with condensate outlet；Afterbody absorption tower tower top
Exported provided with fixed gas；The adsorbing tower with molecular sieve is provided with high pressure nitrogen import, and the quantity of adsorbing tower with molecular sieve is no less than one
Individual, multiple adsorbing tower with molecular sieve are installed in parallel, can simultaneously using or be used alternatingly.
The beneficial effect of process and device in the utility model is：(1) absorbent, which absorbs, contains HCl, SO2Tail gas
It is an exothermic process, HCl, SO of the too high discharge of temperature in absorption tower2Secondary tail gas will increase, reduce absorption effect
Fruit, cooler is set up after circulating pump, reduce solution temperature, cryogenic fluid directly contacts pyrosol and reaches reduction absorption tower
The purpose of interior temperature；(2) absorbent can reuse, and avoid the environmental pollution of discharge, and reduce production cost, carry
High economic benefit；(3) HCl and SO2Separation it is complete, HCl and SO2The rate of recovery it is high, up to more than 99.9%；(4) divide
Son sieve adsorption tower is repeatable to be recycled, cost-effective, improves efficiency；(5) the utility model have very high practical value and
Very big market needs.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is the structural representation of the utility model embodiment.
Wherein, gas-liquid filteration device 1；First order absorption tower 2；Second level absorption tower 3；Adsorbing tower with molecular sieve 4；1# molecular sieves are inhaled
Attached tower 4-1；2# adsorbing tower with molecular sieve 4-2；NaOH solution tank NaOH 5；HCl rectifying columns 6；SO2Rectifying column 7；Circulating pump 8；Cooler 9；HCl is again
Boil device 10；HCl overhead condensers 11；HCl products surge tank 12；SO2Reboiler 13；SO2Overhead condenser 14；SO2Product buffers
Tank 15；Absorbent surge tank 16；Absorption drying system 17.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
Embodiment 1
Such as Fig. 1, one kind recovery contains SO2, HCl tail gas device, the device include absorption plant, adsorbing tower with molecular sieve 4,
HCl rectifying columns 6, SO2Rectifying column 7, wherein：
Absorption plant, absorption plant include two-stage absorption tower, and numbering is first order absorption tower 2, second level absorption tower 3, and
The tower top of first grade absorption tower 2 connects the tower reactor of second level absorption tower 3, and first order absorption tower 2 and second can be achieved in the two-way conveying of material
The inner loop on level absorption tower 3, the tower top of second level absorption tower 3 export provided with fixed gas；The tower top of first order absorption tower 2 and tower reactor it
Between and the pipeline between the tower top of second level absorption tower 3 and tower reactor on be respectively arranged with circulating pump 8 and cooler 9, first order absorption tower 2
Tower reactor connects adsorbing tower with molecular sieve tower reactor charging aperture；By setting the chain regulating valve of far transmission level meter, flowmeter to connect on the line
Regulating valve or far transmission level meter and the chain regulating valve of flowmeter are locked, is realized between first order absorption tower 2 and second level absorption tower 3
Matter Transfer, and the transport of material.
Adsorbing tower with molecular sieve 4, adsorbing tower with molecular sieve 4 are provided with high pressure nitrogen import, and the quantity of adsorbing tower with molecular sieve 4 has two
Individual, 1# adsorbing tower with molecular sieve 4-1 and 2# adsorbing tower with molecular sieve 4-2, two adsorbing tower with molecular sieve 4 are installed in parallel to be absorbed in the first order
Between the tower reactor of tower 2 and HCl rectifying columns 6, two adsorbing tower with molecular sieve 4 can simultaneously using or be used alternatingly；
HCl rectifying columns 6, the middle part of the HCl rectifying columns 6 connection tower top discharging opening of adsorbing tower with molecular sieve 4, HCl rectifying columns 6 and molecule
NaOH solution tank NaOH 5 is housed on pipeline between the sieve tower top discharging opening of adsorption tower 4；The tower reactor of HCl rectifying columns 6 is connected with HCl reboilers 10,
The tower top of HCl rectifying columns 6 is equipped with HCl overhead condensers 11, and HCl overhead condensers 11 have HCl products surge tank 12, HCl productions
The output end of product surge tank 12 is connected to the tower top of HCl rectifying columns 6；
SO2Rectifying column 7, SO2The tower reactor of the middle part of rectifying column 7 connection HCl rectifying columns 6, SO2The tower reactor of rectifying column 7 is connected with absorbent
Surge tank 16；SO2The tower reactor of rectifying column 7 is connected with SO2Reboiler 13, SO2The tower top of rectifying column 7 is equipped with SO2Overhead condenser 14, SO2
Overhead condenser 14 has SO2Product surge tank 15, SO2The output end of product surge tank 15 is connected to SO2The tower top of rectifying column 7.
Absorbent surge tank 16 is also connected to second level absorption tower 3 by pipeline, sets far transmission level meter to connect on the line
Regulating valve, the chain regulating valve of flowmeter or far transmission level meter and the chain regulating valve of flowmeter are locked, automatically by absorbent surge tank 16
In absorbent input second level absorption tower 3, in this way, second level absorption tower 3 and SO2Absorbent is completed between rectifying column 7
Returning charge circulates.
Top of the device with gas-liquid filteration device 1 for vent gas treatment, using absorption tower and molecular sieve adsorption as pilot process, with
HCl rectifying columns 6 and SO2Rectifying column 7 is terminal, forms a complete procedure of vent gas treatment.
Embodiment 2
Such as Fig. 2, on the basis of embodiment 1, the quantity of adsorbing tower with molecular sieve 4 is one, and the tower reactor of adsorbing tower with molecular sieve 4 is
Discharging opening, tower top are charging aperture, and absorption tower quantity is one.HCl products surge tank 12 and SO2Connect after product surge tank 15
Absorption drying system 17.In addition, the retracting device also includes gas-liquid filteration device 1, the top exit connection of gas-liquid filteration device 1 absorbs
The tower reactor of tower 2, gas-liquid filteration device 1 are provided with charging aperture, and top is provided with gas vent, and bottom is provided with condensate outlet.
Top of the device with gas-liquid filteration device 1 for vent gas treatment, with absorption tower and adsorbing tower with molecular sieve 4 for middle mistake
Journey, with HCl rectifying columns 6 and SO2Rectifying column 7 is terminal, forms a complete procedure of exhaust gas processing device.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (10)
1. one kind recovery contains SO2, HCl tail gas device, it is characterised in that the device according to processing sequence successively include connection
's：
Absorption plant, absorption plant include absorption tower, the top exit of the absorption tower tower reactor connection gas-liquid filteration device；
Adsorbing tower with molecular sieve, adsorbing tower with molecular sieve charging aperture connection absorption tower tower reactor；
HCl rectifying columns, HCl rectifying columns connection adsorbing tower with molecular sieve discharging opening；
SO2Rectifying column, SO2 rectifying columns connection HCl tower bottom of rectifying tower, SO2Tower bottom of rectifying tower is connected with absorbent surge tank；
Absorbent in each absorption tower is organic solvent.
2. a kind of recovery according to claim 1 contains SO2, HCl tail gas device, it is characterised in that the absorption tower is extremely
It is one-level less；When having multistage absorption tower, adsorbing tower with molecular sieve connection first order absorption tower, multistage absorption tower is connected in series, previous
Level absorption tower tower top connects rear stage absorption tower tower reactor, and origin returns the pipeline connection circulated, the suction between adjacent absorption tower
Receive agent surge tank and afterbody absorption tower is connected to by pipeline.
3. a kind of recovery according to claim 1 contains SO2, HCl tail gas device, it is characterised in that the absorption tower is also
Gas-liquid filteration device is connected to, the top exit of gas-liquid filteration device is connected by absorption tower tower reactor, the gas-liquid filteration device is provided with
Charging aperture, top are provided with gas vent, and bottom is provided with condensate outlet.
4. SO is contained according to any described a kind of recovery in claim 1,2 or 32, HCl tail gas device, it is characterised in that institute
State and be respectively arranged with circulating pump and cooler on the pipeline between absorption tower tower top and tower reactor.
5. a kind of recovery according to claim 1 contains SO2, HCl tail gas device, it is characterised in that the HCl rectifying
Tower tower reactor is connected with HCl reboilers, and the HCl rectifying towers are top-loaded with HCl overhead condensers, and HCl overhead condensers have
HCl product surge tanks, the output end of HCl product surge tanks are connected to HCl rectifying column tower tops.
6. a kind of recovery according to claim 1 contains SO2, HCl tail gas device, it is characterised in that the SO2Rectifying
Tower tower reactor is connected with SO2Reboiler, the SO2Rectifying tower is top-loaded with SO2Overhead condenser, SO2Overhead condenser has SO2
Product surge tank, SO2The output end of product surge tank is connected to SO2Rectifying column tower top.
7. a kind of recovery according to claim 1 contains SO2, HCl tail gas device, it is characterised in that the HCl rectifying
Solution surge tank is housed on the pipeline between tower and adsorbing tower with molecular sieve discharging opening.
8. a kind of recovery according to claim 1 or 7 contains SO2, HCl tail gas device, it is characterised in that the molecule
Sieve adsorption tower quantity be no less than one, multiple adsorbing tower with molecular sieve are installed in parallel, can simultaneously using or be used alternatingly.
9. a kind of recovery according to claim 5 contains SO2, HCl tail gas device, it is characterised in that the HCl products
Surge tank is followed by absorption drying system.
10. a kind of recovery according to claim 6 contains SO2, HCl tail gas device, it is characterised in that the SO2Product
Surge tank is followed by absorption drying system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268169.4U CN206688465U (en) | 2017-03-17 | 2017-03-17 | One kind recovery contains SO2, HCl tail gas device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268169.4U CN206688465U (en) | 2017-03-17 | 2017-03-17 | One kind recovery contains SO2, HCl tail gas device |
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| CN206688465U true CN206688465U (en) | 2017-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109455670A (en) * | 2018-11-29 | 2019-03-12 | 山东新龙科技股份有限公司 | A kind of F32 device by-product HCl process for refining and its equipment |
-
2017
- 2017-03-17 CN CN201720268169.4U patent/CN206688465U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109455670A (en) * | 2018-11-29 | 2019-03-12 | 山东新龙科技股份有限公司 | A kind of F32 device by-product HCl process for refining and its equipment |
| CN109455670B (en) * | 2018-11-29 | 2020-11-17 | 山东新龙科技股份有限公司 | F32 device byproduct HCl refining process and equipment thereof |
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