CN101623584A - Hydrochloric acid full stripping method - Google Patents
Hydrochloric acid full stripping method Download PDFInfo
- Publication number
- CN101623584A CN101623584A CN200910181965A CN200910181965A CN101623584A CN 101623584 A CN101623584 A CN 101623584A CN 200910181965 A CN200910181965 A CN 200910181965A CN 200910181965 A CN200910181965 A CN 200910181965A CN 101623584 A CN101623584 A CN 101623584A
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- CN
- China
- Prior art keywords
- hydrochloric acid
- acid
- tower
- hydrogen chloride
- hcl
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 46
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002253 acid Substances 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- 239000003595 mist Substances 0.000 claims abstract description 3
- 241000282326 Felis catus Species 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 7
- 239000003507 refrigerant Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005660 chlorination reaction Methods 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000003795 desorption Methods 0.000 abstract 2
- 229920006395 saturated elastomer Polymers 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a hydrochloric acid full stripping method which comprises the following steps: concentrated hydrochloric acid is heated in a double-effect concentrated hydrochloric acid heat exchanger and then enters the top of a concentrated hydrochloric acid desorption tower; heat transmission and mass transmission are carried out between the concentrated hydrochloric acid and high-temperature hydrogen chloride coming from a reboiler and vapor; hydrogen chloride gas containing saturated water is obtained at the top of the tower, and azeotropic acid is obtained at the bottom of the tower; the hydrogen chloride gas containing saturated water passes through a secondary condenser using cooling water as a cooling medium for removing carried acid mist and is further treated by a low-temperature demister to obtain dry hydrogen chloride gas which is transferred outside through a pipeline; and the azeotropic acid is treated by pressure changing and deep desorption. The invention has easy operation and less energy consumption, the content of hydrogen chloride in final waste water is less than or equal to 1 percent, and because the double-effect heat exchanger is adopted, the operation cost is reduced.
Description
Technical field:
The present invention relates to a kind of hydrochloric acid analytic method.
Background technology:
Existing Production of PVC by-product hydrochloric acid is generally handled by the combination extracting tower, synthesis gas comes out from the demercuration device, temperature is about 110 to 130 ℃, after entering the one-level syngas cooler and making cooling medium temperature is reduced to 45～60 ℃, send the secondary syngas cooler again to and make cooling medium with+5 ℃ of chilled waters temperature is reduced to 15 to 20 ℃ with recirculated water.Synthesis gas enters the combination extracting tower at the bottom of tower, come out at the bottom of tower, to enter the water scrubber of combination extracting tower after in the extracting tower of combination extracting tower, removing a large amount of hydrogen chloride from cat head, eject the synthesis gas that comes from water scrubber and at the bottom of tower, enter the caustic wash tower that makes up extracting tower, after cat head comes out, send compression section.Fresh water enters the washing cat head continuously, forms acidic circulation liquid, and acid liquid enters the extracting tower of combination extracting tower continuously, and extracting tower makes～and 31% hydrochloric acid delivers to hydrochloric acid and takes off and inhale the unit or sell outward.
Summary of the invention:
The object of the present invention is to provide a kind of easy to operate, energy consumption is little, the low hydrochloric acid full stripping method of hydrogen chloride content in the final waste water.
Technical solution of the present invention is:
A kind of hydrochloric acid full stripping method is characterized in that: comprise the following steps:
(1) will enter concentrated acid desorber top after the heating of concentrated hydrochloric acid process economic benefits and social benefits concentrated hydrochloric acid heat exchanger, with high-temp chlorination hydrogen and steam countercurrent heat-transfer, mass transfer in tower from reboiler, obtain containing the hydrogen chloride gas of saturation water at cat head, at the bottom of tower, obtain containing the azeotropic acid of 18.2～20% mass concentration HCl;
(2) hydrogen chloride gas that contains saturation water is through by cooling water being the acid mist that the secondary condenser cooling of refrigerant removes deentrainment, and further the low temperature demister is handled and obtained dry hydrogen chloride gas and sent by pipeline;
(3) the azeotropic acid that contains 18.2～20% mass concentration HCl is taken off the suction processing through the transformation degree of depth.
The described degree of depth of step (3) is taken off to inhale to handle and is comprised the following steps: that the azeotropic acid that contains 18.2～20% mass concentration HCl enters vacuum stripper through the vacuum stripper desorb, the mass concentration that cat head obtains is that the condenser cooling of refrigerant obtains concentration less than 1% HCl liquid less than 1% HCl gas via cooling water, and what obtain at the bottom of the tower is the diluted acid that contains the HCl of 22%～23% mass concentration.
The described transformation degree of depth of step (3) is taken off to inhale to handle and is comprised the following steps: the rectification under vacuum tower is sent in azeotropic acid, and the hydrochloric acid that obtains after the rectifying send the combination extracting tower to handle.
Concentrated hydrochloric acid described in the step (1) is the concentrated hydrochloric acid that obtains after the combination extracting tower is handled.
The present invention is easy to operate, energy consumption is little, hydrogen chloride content≤1% in the final waste water, adopts the economic benefits and social benefits heat exchanger, saves operating cost.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the system diagram of the embodiment of the invention 1.
The specific embodiment:
Embodiment 1: a kind of hydrochloric acid full stripping method comprises the following steps:
(1) will enter concentrated acid desorber 3 tops after 2 heating of concentrated hydrochloric acid process economic benefits and social benefits concentrated hydrochloric acid heat exchanger, with high-temp chlorination hydrogen and steam countercurrent heat-transfer, mass transfer in tower from reboiler 4, obtain containing the hydrogen chloride gas of saturation water at cat head, at the bottom of tower, obtain containing the azeotropic acid of 18.2～20% (mass concentration) HCl; Concentrated hydrochloric acid described in the step (1) is the concentrated hydrochloric acid that obtains after combination extracting tower 1 is handled.
(2) hydrogen chloride gas that contains saturation water is through by cooling water being the acid mists that secondary condenser 5,6 coolings of refrigerant remove deentrainment, and further low temperature demister 7 is handled and obtained dry hydrogen chloride gas and sent by pipeline;
(3) the azeotropic acid that contains 18.2～20%HCl is taken off the suction processing through the transformation degree of depth, and cat head yield and quality concentration is produced the diluted acid that contains 22%～23% mass concentration HCl less than the waste water of 1%HCl at the bottom of the tower.
The described transformation degree of depth of step (3) is taken off inhale to handle and is comprised the following steps: that specifically mass concentration is that 18.2～20% azeotropic acid enters vacuum stripper through the vacuum stripper desorb, it is that the condenser cooling of refrigerant obtains mass concentration less than 1%HCl liquid less than the 1%HCl gas via cooling water that cat head obtains mass concentration, and what obtain at the bottom of the tower is the diluted acid that contains 22%～23% mass concentration HCl.
Also have among the figure: 5 ℃ of water remove refrigeration station pipeline 13,5 ℃ of water go out refrigeration station pipeline 14, HCl cooler 15, HCl circulation fluid cooler 16,17, HCl absorbs charge pump 18,19,19.5%HCl storage tank 20, HCl circulation absorption pump 21, cooling vinyl chloride conveyance conduit 22, the vinyl chloride lixiviating is washed operation pipeline 23, concentrated acid storage tank 24,31%HCl charge pump 25, heat exchanger 26,0.8MPa steam supply pipe road 27,19.5%HCl storage tank 28,19%HCl charge pump 29, calcium chloride charge pump 30, calcium chloride storage tank 31, heat exchanger 32, reboiler 33,0.8MPa steam supply pipe road 34,35, high-temp chlorination calcium charge pump 36,0.8MPa steam supply pipe road 37, reboiler 38, condenser 39,1%HCl storage tank 40,1%HCl delivery pump 41.
Embodiment 2:
Step (3) the transformation degree of depth is taken off to inhale to handle and changed into: the rectification under vacuum tower is sent in azeotropic acid, and the hydrochloric acid that obtains after the rectifying send the combination extracting tower to handle.All the other are with embodiment 1.
Claims (4)
1, a kind of hydrochloric acid full stripping method is characterized in that: comprise the following steps:
(1) will enter concentrated acid desorber top after the heating of concentrated hydrochloric acid process economic benefits and social benefits concentrated hydrochloric acid heat exchanger, with high-temp chlorination hydrogen and steam countercurrent heat-transfer, mass transfer in tower from reboiler, obtain containing the hydrogen chloride gas of saturation water at cat head, at the bottom of tower, obtain containing the azeotropic acid of 18.2～20% mass concentration HCl;
(2) hydrogen chloride gas that contains saturation water is through by cooling water being the acid mist that the secondary condenser cooling of refrigerant removes deentrainment, and further the low temperature demister is handled and obtained dry hydrogen chloride gas and sent by pipeline;
(3) the azeotropic acid that contains 18.2～20% mass concentration HCl is taken off the suction processing through the transformation degree of depth.
2, hydrochloric acid full stripping method according to claim 1, it is characterized in that: the described degree of depth of step (3) is taken off to inhale to handle and is comprised the following steps: that the azeotropic acid that contains 18.2～20% mass concentration HCl enters vacuum stripper through the vacuum stripper desorb, the mass concentration that cat head obtains is that the condenser cooling of refrigerant obtains concentration less than 1% HCl liquid less than 1% HCl gas via cooling water, and what obtain at the bottom of the tower is the diluted acid that contains the HCl of 22%～23% mass concentration.
3, hydrochloric acid full stripping method according to claim 1 is characterized in that: the described transformation degree of depth of step (3) is taken off to inhale to handle and is comprised the following steps: the rectification under vacuum tower is sent in azeotropic acid, and the hydrochloric acid that obtains after the rectifying send the combination extracting tower to handle.
4, according to claim 1,2 or 3 described hydrochloric acid full stripping methods, it is characterized in that: the concentrated hydrochloric acid described in the step (1) is the concentrated hydrochloric acid that obtains after the combination extracting tower is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910181965A CN101623584A (en) | 2009-07-28 | 2009-07-28 | Hydrochloric acid full stripping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910181965A CN101623584A (en) | 2009-07-28 | 2009-07-28 | Hydrochloric acid full stripping method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101623584A true CN101623584A (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910181965A Pending CN101623584A (en) | 2009-07-28 | 2009-07-28 | Hydrochloric acid full stripping method |
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| CN (1) | CN101623584A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387573A (en) * | 2012-05-08 | 2013-11-13 | 江苏兄弟维生素有限公司 | Preparation process for thiamine hydrochloride |
| CN105947983A (en) * | 2016-05-09 | 2016-09-21 | 杭州中昊科技有限公司 | Preparation method of anhydrous hydrogen chloride |
| CN107161950A (en) * | 2017-06-29 | 2017-09-15 | 天津黄埔盐化工程技术有限公司 | The thickening device and method of a kind of low concentration waste hydrochloric acid |
| CN107998827A (en) * | 2017-12-22 | 2018-05-08 | 江苏天楹环保能源成套设备有限公司 | A kind of high temperature gas containing acid fume hydrogen chloride recovery system |
| CN108483399A (en) * | 2018-05-29 | 2018-09-04 | 杭州东日节能技术有限公司 | A kind of VCM purification hydrochloric acid full stripping device and technique |
| CN112090235A (en) * | 2020-09-09 | 2020-12-18 | 杭州东日节能技术有限公司 | A kind of purification system and purification process of hydrochloric acid by-product of chlorination reaction |
| CN112239199A (en) * | 2019-07-19 | 2021-01-19 | 吴军祥 | Hydrochloric acid desorption tower and process using superheated steam as desorption gas in tower kettle |
| CN113398720A (en) * | 2021-07-20 | 2021-09-17 | 四川永祥股份有限公司 | Absorption tower and system for producing electronic-grade hydrochloric acid by utilizing hydrochloric acid resolution |
-
2009
- 2009-07-28 CN CN200910181965A patent/CN101623584A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387573A (en) * | 2012-05-08 | 2013-11-13 | 江苏兄弟维生素有限公司 | Preparation process for thiamine hydrochloride |
| CN105947983A (en) * | 2016-05-09 | 2016-09-21 | 杭州中昊科技有限公司 | Preparation method of anhydrous hydrogen chloride |
| CN105947983B (en) * | 2016-05-09 | 2018-11-30 | 杭州中昊科技有限公司 | A kind of preparation method of anhydrous hydrogen chloride |
| CN107161950A (en) * | 2017-06-29 | 2017-09-15 | 天津黄埔盐化工程技术有限公司 | The thickening device and method of a kind of low concentration waste hydrochloric acid |
| CN107998827A (en) * | 2017-12-22 | 2018-05-08 | 江苏天楹环保能源成套设备有限公司 | A kind of high temperature gas containing acid fume hydrogen chloride recovery system |
| CN107998827B (en) * | 2017-12-22 | 2019-11-01 | 江苏天楹环保能源成套设备有限公司 | A kind of high temperature gas containing acid fume hydrogen chloride recovery system |
| CN108483399A (en) * | 2018-05-29 | 2018-09-04 | 杭州东日节能技术有限公司 | A kind of VCM purification hydrochloric acid full stripping device and technique |
| CN112239199A (en) * | 2019-07-19 | 2021-01-19 | 吴军祥 | Hydrochloric acid desorption tower and process using superheated steam as desorption gas in tower kettle |
| CN112090235A (en) * | 2020-09-09 | 2020-12-18 | 杭州东日节能技术有限公司 | A kind of purification system and purification process of hydrochloric acid by-product of chlorination reaction |
| CN113398720A (en) * | 2021-07-20 | 2021-09-17 | 四川永祥股份有限公司 | Absorption tower and system for producing electronic-grade hydrochloric acid by utilizing hydrochloric acid resolution |
| CN113398720B (en) * | 2021-07-20 | 2023-03-17 | 四川永祥股份有限公司 | Absorption tower and system for producing electronic-grade hydrochloric acid by utilizing hydrochloric acid resolution |
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Open date: 20100113 |