CN208436419U - A kind of dilute hydrochloric acid vacuum concentration tower - Google Patents
A kind of dilute hydrochloric acid vacuum concentration tower Download PDFInfo
- Publication number
- CN208436419U CN208436419U CN201820811553.9U CN201820811553U CN208436419U CN 208436419 U CN208436419 U CN 208436419U CN 201820811553 U CN201820811553 U CN 201820811553U CN 208436419 U CN208436419 U CN 208436419U
- Authority
- CN
- China
- Prior art keywords
- hydrochloric acid
- dilute hydrochloric
- tower
- section
- concentrated
- Prior art date
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a kind of dilute hydrochloric acid to be concentrated in vacuo tower, it from bottom to top sequentially include hydrochloric acid explosive evaporation section, dilute hydrochloric acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride section, reboiler boiling mixed in hydrochloric acid import is equipped at the top of hydrochloric acid explosive evaporation section, bottom is exported equipped with concentrate acid；It is equipped with dilute hydrochloric acid import at the top of dilute hydrochloric acid stripping dehydration enriching section, the first low sprinkle density liquid distribution trough, the first packing layer is arranged in sequence below dilute hydrochloric acid import；It is equipped with return of waste water import at the top of return of waste water absorbing hydrogen chloride section, the second low sprinkle density liquid distribution trough, the second packing layer is arranged in sequence below return of waste water import.Dilute hydrochloric acid is concentrated into 22% or more after the utility model is handled, while hydrogen chloride content is not more than 1% in overhead vapor stream；Due to vacuum concentration tower in do not add calcium chloride or other, so there is no fouling and blocking the problems such as；The utility model has many advantages, such as that high reliablity, resistance to pressure are good, it is strong, easy for installation to adapt to failures.
Description
Technical field
The utility model relates to a kind of enrichment facilities, are concentrated in vacuo tower more particularly, to a kind of dilute hydrochloric acid.
Background technique
By the end of about 23,000,000 tons/year of domestic PVC total productive capacity of in December, 2017, wherein former using calcium carbide
Material process route device accounts for about 83%, remaining is ethylene subtraction unit.In carbide raw material route process units, VCM is purified back
Due to (mercury chloride is the catalyst for being converted into VCM) containing mercury element in the hydrochloric acid of receipts, cannot discharge, therefore VCM is purified back
The hydrochloric acid of receipts has been all made of resolving hydrochloric acid technology, and recycling hydrogen chloride recycles, most in order to solve the problems, such as water balance
Resolving hydrochloric acid device is divided into two parts: the conventional resolution of concentrated hydrochloric acid+part dilute hydrochloric acid deep analysis (Calcium Chloride Method), calcium chloride
The water that method complete solution analysis part mainly parses Low acid (~1%HCL) returns to purification combination water scrubber.Currently running chlorination
There are following disadvantages in commercial practice for the full analysis unit of calcium method dilute hydrochloric acid:
(1), it since Calcium Chloride Method dilute hydrochloric acid complete solution analysis apparatus technological temperature is high (120 DEG C~135 DEG C of bottom temperature), then boils
High (≤the 0.6MPa of the steam pressure that device uses (G)), cause the plant failure rate high, especially graphite reboiler.
(2), due to high calcium chloride concentration aqueous solution the characteristics of, it is easy the fouling at reboiler hole wall, leads to its heat transfer effect
Rate decline, eventually leads to reboiler cisco unity malfunction.
So blocking in order to prevent in actual industrialization operation, improving the cycle of operation of device, current enterprise uses
The method of calcium chloride salt acid solution in regular displacement apparatus, prevents harmful ion from accumulating.Typical method is Calcium Chloride Method depth
Calcium chloride is primary in resolver first quarter exchange system, and year replaces 4 times or so.The drawbacks of doing so is that device must discharge and contain
The dilute waste solution of calcium chloride of mercury, device do not accomplish real " zero " discharge.And the mercurous dilute waste solution of calcium chloride amount always discharged in year is not
Few, by taking typical 300,000 tons of PVC devices as an example, annual emissions reach 20~25 tons of mercurous dilute waste solution of calcium chloride.It is mercurous with high salt
Waste liquid needs high processing cost.
Utility model content
In order to overcome the shortcomings of the prior art, the utility model provides a kind of dilute hydrochloric acid vacuum concentration tower.
A kind of dilute hydrochloric acid is concentrated in vacuo tower, and the vacuum concentration tower is from bottom to top sequentially including hydrochloric acid explosive evaporation section, dilute
Hydrochloric acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride section, the hydrochloric acid explosive evaporation section top are equipped with reboiler and boil
Mixed in hydrochloric acid import, hydrochloric acid explosive evaporation section bottom are exported equipped with concentrate acid；It is set at the top of the dilute hydrochloric acid stripping dehydration enriching section
There is dilute hydrochloric acid import, the first low sprinkle density liquid distribution trough is equipped with below the dilute hydrochloric acid import, the first low spray is close
It spends and is equipped with the first packing layer below liquid distribution trough；Return of waste water import is equipped at the top of the return of waste water absorbing hydrogen chloride section,
The second low sprinkle density liquid distribution trough, the second low sprinkle density liquid distribution trough are equipped with below the return of waste water import
Lower section is equipped with the second packing layer.
Preferably, first packing layer, the second packing layer are non-metallic plates corrugated filler layer.
Preferably, the vacuum concentration top of tower is equipped with steam outlet.
Preferably, being equipped with demisting device assembly above the return of waste water import.
Preferably, the hydrochloric acid explosive evaporation section, dilute hydrochloric acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride
Section is equipped with corresponding manhole.
Preferably, the hydrochloric acid explosive evaporation section bottom is equipped with thermometer mouth and first liquid level gauge mouth, the hydrochloric acid boiling
It rises and is equipped with second liquid level gauge mouth in the middle part of evaporator section.
Preferably, being equipped with pressure gauge port above the reboiler boiling mixed in hydrochloric acid import.
Preferably, the dilute hydrochloric acid import, the outlet of concentrate acid are connected with concentrated hydrochloric acid Analytic Tower respectively.
Preferably, the vacuum concentration tower outer wall is equipped with the outer stiffening ring of tower body.
Working principle of the utility model is:
Using the different physical property design of the azeotrope composition concentration of dilute hydrochloric acid at various pressures, such as in normal pressure
The composition of lower azeotropic dilute hydrochloric acid is hydrogen chloride 20.24% and water 79.76%；When pressure reduction is to 30KPaA, azeotropic dilute hydrochloric acid
Composition be hydrogen chloride 22.5% and water 77.5%.In this way to the barostat control parsed with normal pressure, stripped by heating under reduced pressure
Part water can be isolated, so that dilute hydrochloric acid be concentrated.
For the utility model due to the deep-etching characteristic of hydrochloric acid, tower body and the distribution of tower internals material use different high corrosion resistants
Erosion, high strength nonmetallic material such as glass reinforced plastic or PPH manufacture have preferably mechanical compared with common graphite resolving hydrochloric acid tower
Performance, reliability are high pressure resistant；It is strong to adapt to failures；Whole tower light weight, shock resistance is good, easy for installation；It can solving
While by property problem, economy has been taken into account.
Existing polyvinyl chloride factory VCM purification resolving hydrochloric acid device there are aiming at the problem that: dilute hydrochloric acid Calcium Chloride Method complete solution
Analysis apparatus high failure rate, the cycle of operation are short；There is mercurous dilute waste solution of calcium chloride discharge；And the spy of VCM purification resolving hydrochloric acid device
Point, we analyse subsystem using dilute hydrochloric acid vacuum concentration subsystem replacement Calcium Chloride Method dilute hydrochloric acid complete solution, under certain vacuum degree
Change dilute hydrochloric acid azeotropic concentration composition, the water for isolating part Low acid (~1%HCL) returns to purification combination water scrubber, solves
The water balance of whole device.The advantages of designing in this way is the calcium chloride solution for not having easy fouling in system, and system is not mercurous
Dilute waste solution of calcium chloride discharge.Dilute hydrochloric acid vacuum concentration subsystem is run under certain vacuum degree simultaneously, and dilute hydrochloric acid boiling temperature is low,
The heating steam pressure needed is low, solves the integrity problem of device, meets new process device long period continuous operation
It is required that.The dilute hydrochloric acid vacuum concentration tower of the utility model is the core equipment of above-mentioned new process, it is according to dilute salt under different pressures
Acid azeotrope forms different principle exploitations, while also solving what heat and quality under low sprinkle density effectively transmitted
Process difficulties.
The utility model has the beneficial effects that:
(1) tower dilute hydrochloric acid is concentrated in vacuo by the utility model and is concentrated into 22% or more, while chlorine in overhead vapor stream
Change hydrogen content and is not more than 1%；
(2) due to vacuum concentration tower in do not add calcium chloride or other, so there is no fouling and blocking the problems such as；
(3) the utility model has many advantages, such as that high reliablity, resistance to pressure are good, it is strong, easy for installation to adapt to failures.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but claimed by the utility model
Range be not limited to this.
Referring to Fig.1, a kind of dilute hydrochloric acid is concentrated in vacuo tower, and the vacuum concentration tower from bottom to top sequentially includes that hydrochloric acid boiling is steamed
Section 1, dilute hydrochloric acid stripping dehydration enriching section 2 and return of waste water absorbing hydrogen chloride section 3 are sent out, is set at the top of the hydrochloric acid explosive evaporation section 1
There is reboiler boiling mixed in hydrochloric acid import 4,1 bottom of hydrochloric acid explosive evaporation section is equipped with concentrate acid outlet 5；The dilute hydrochloric acid stripping is de-
It is equipped with dilute hydrochloric acid import 6 at the top of water enriching section 2, is equipped with the first low sprinkle density liquid distribution trough below the dilute hydrochloric acid import 6
7, the first non-metallic plates corrugated filler layer 8 is equipped with below the first low sprinkle density liquid distribution trough 7；The waste water returns
It flows and is equipped with return of waste water import 9 at the top of absorbing hydrogen chloride section 3, be equipped with the second low sprinkle density below the return of waste water import 9
Liquid distribution trough 10 is equipped with the second non-metallic plates corrugated filler layer below the second low sprinkle density liquid distribution trough 10
11。
The vacuum concentration top of tower is equipped with steam outlet 12, is equipped with demister group above the return of waste water import 9
Part 13.The hydrochloric acid explosive evaporation section, dilute hydrochloric acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride section are equipped with accordingly
Manhole 14.1 bottom of hydrochloric acid explosive evaporation section is equipped with thermometer mouth 15 and first liquid level gauge mouth 16, and the hydrochloric acid boiling is steamed
It sends out and is equipped with second liquid level gauge mouth 17 in the middle part of section 1, be equipped with pressure gauge port 18 above the reboiler boiling mixed in hydrochloric acid import 4.Institute
State dilute hydrochloric acid import 6, concentrate acid outlet 5 is connected with concentrated hydrochloric acid Analytic Tower respectively.The vacuum concentration tower outer wall is equipped with tower
External stiffening ring 19.
The application method of above-mentioned dilute hydrochloric acid vacuum concentration tower, includes the following steps:
(1) vacuum concentration is entered by dilute hydrochloric acid import 6 after the dilute hydrochloric acid metering from concentrated hydrochloric acid Analytic Tower 19~20%
In tower, mixed on the first low sprinkle density liquid distribution trough 7 with the diluted acid water phegma from vacuum concentration tower upper section, then
It is uniformly distributed in the first packing layer 8 by the first low sprinkle density liquid distribution trough 7, with the chlorination through reboiler heating vaporization
Hydrogen and water vapour (are entered) close contact, under the conditions of certain vacuum degree, opposite low boiling by reboiler boiling mixed in hydrochloric acid import 4
The water vapour part of point is stripped out dilute hydrochloric acid solution, absorbs chlorination with the return of waste water that mixed vapour rises to vacuum concentration tower
Hydrogen section；
(2) above-mentioned mixed vapour passes through return of waste water import 9 with after the outer steam condenser condensation of vacuum concentration tower
It is back to the acid waste water close contact on vacuum concentration tower top, it is true to be absorbed return for extra hydrogen chloride gas in mixed vapour
Empty concentration tower, the water vapour and a small amount of hydrogen chloride for meeting process goal pass through steam outlet 12 and evaporate vacuum concentration tower；
(3) the concentrate hydrochloric acid being concentrated in vacuo in tower returns to the circulation parsing of concentrated hydrochloric acid Analytic Tower by liquid automatic control.
The operating temperature that the utility model is concentrated in vacuo tower is 70~80 DEG C, and operating pressure is -0.08MPa.
The utility model tower body is using highly corrosion resistant, high strength nonmetallic material such as glass reinforced plastic or PPH manufacture, with common stone
Ink resolving hydrochloric acid tower, which is compared, has better mechanical performance, and reliability is high pressure resistant；It is strong to adapt to failures；Whole tower light weight,
Shock resistance is good, easy for installation.Low sprinkle density liquid distribution trough uses epoxy novolac vinylite base glass steel material
Manufacture, intensity is high, and hydrochloric acid corrosion resistant performance is good, good reliability.
The utility model vacuum concentration tower be broadly divided into three functional areas, be respectively from bottom to top hydrochloric acid explosive evaporation section,
Dilute hydrochloric acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride section；As long as dilute hydrochloric acid concentration meets≤22%, can lead to
It crosses the tower and is concentrated into 22% or more, while hydrogen chloride content is not more than 1% in overhead vapor stream.The utility model is mentioned with calcium chloride
Dense tower ratio, do not add in the tower calcium chloride or other, so non flouling behaviour and blocking.
Claims (9)
1. a kind of dilute hydrochloric acid is concentrated in vacuo tower, it is characterised in that: the vacuum concentration tower from bottom to top sequentially includes that hydrochloric acid boils
Evaporator section, dilute hydrochloric acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride section, the hydrochloric acid explosive evaporation section top are equipped with
Reboiler boiling mixed in hydrochloric acid import, hydrochloric acid explosive evaporation section bottom is exported equipped with concentrate acid；The dilute hydrochloric acid stripping dehydration is dense
It is equipped with dilute hydrochloric acid import at the top of contracting section, is equipped with the first low sprinkle density liquid distribution trough below the dilute hydrochloric acid import, described the
The first packing layer is equipped with below one low sprinkle density liquid distribution trough；Waste water is equipped at the top of the return of waste water absorbing hydrogen chloride section
Flow back import, is equipped with the second low sprinkle density liquid distribution trough, the second low sprinkle density below the return of waste water import
The second packing layer is equipped with below liquid distribution trough.
2. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: first packing layer, the second filler
Layer is non-metallic plates corrugated filler layer.
3. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: the vacuum concentration top of tower is equipped with water
Steam (vapor) outlet.
4. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: be equipped with above the return of waste water import
Demisting device assembly.
5. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: the hydrochloric acid explosive evaporation section, dilute salt
Acid stripping dehydration enriching section and return of waste water absorbing hydrogen chloride section are equipped with corresponding manhole.
6. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: the hydrochloric acid explosive evaporation section bottom is set
There are thermometer mouth and first liquid level gauge mouth, is equipped with second liquid level gauge mouth in the middle part of the hydrochloric acid explosive evaporation section.
7. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: the reboiler boil mixed in hydrochloric acid into
Pressure gauge port is equipped with above mouthful.
8. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: the dilute hydrochloric acid import, concentrate acid go out
Mouth is connected with concentrated hydrochloric acid Analytic Tower respectively.
9. dilute hydrochloric acid according to claim 1 is concentrated in vacuo tower, it is characterised in that: the vacuum concentration tower outer wall is equipped with
The outer stiffening ring of tower body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820811553.9U CN208436419U (en) | 2018-05-29 | 2018-05-29 | A kind of dilute hydrochloric acid vacuum concentration tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820811553.9U CN208436419U (en) | 2018-05-29 | 2018-05-29 | A kind of dilute hydrochloric acid vacuum concentration tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208436419U true CN208436419U (en) | 2019-01-29 |
Family
ID=65092233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820811553.9U Withdrawn - After Issue CN208436419U (en) | 2018-05-29 | 2018-05-29 | A kind of dilute hydrochloric acid vacuum concentration tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208436419U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525337A (en) * | 2018-05-29 | 2018-09-14 | 杭州东日节能技术有限公司 | A kind of dilute hydrochloric acid is concentrated in vacuo tower and its application method |
| CN110272348A (en) * | 2019-07-10 | 2019-09-24 | 南京蓝胜环保科技有限公司 | Recovery process for organic silicon waste acid containing tri-n-butylamine, siloxane and aluminum chloride |
| CN110548371A (en) * | 2019-10-15 | 2019-12-10 | 谢杰锋 | Analytic tower with measuring apparatu is clear away foam |
| CN112316473A (en) * | 2020-11-20 | 2021-02-05 | 安徽鑫泰新材料有限公司 | Hydrochloric acid deep resolution tower for trimethyl orthoacetate and use method thereof |
-
2018
- 2018-05-29 CN CN201820811553.9U patent/CN208436419U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525337A (en) * | 2018-05-29 | 2018-09-14 | 杭州东日节能技术有限公司 | A kind of dilute hydrochloric acid is concentrated in vacuo tower and its application method |
| CN110272348A (en) * | 2019-07-10 | 2019-09-24 | 南京蓝胜环保科技有限公司 | Recovery process for organic silicon waste acid containing tri-n-butylamine, siloxane and aluminum chloride |
| CN110272348B (en) * | 2019-07-10 | 2022-05-13 | 南京蓝胜环保科技有限公司 | Recovery process for organic silicon waste acid containing tri-n-butylamine, siloxane and aluminum chloride |
| CN110548371A (en) * | 2019-10-15 | 2019-12-10 | 谢杰锋 | Analytic tower with measuring apparatu is clear away foam |
| CN112316473A (en) * | 2020-11-20 | 2021-02-05 | 安徽鑫泰新材料有限公司 | Hydrochloric acid deep resolution tower for trimethyl orthoacetate and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208436419U (en) | A kind of dilute hydrochloric acid vacuum concentration tower | |
| CN108525337A (en) | A kind of dilute hydrochloric acid is concentrated in vacuo tower and its application method | |
| CN108483399A (en) | A kind of VCM purification hydrochloric acid full stripping device and technique | |
| CN106474755A (en) | Integral type falling film evaporation separator | |
| CN102267868B (en) | Industrial production apparatus for trichloroethylene | |
| CN104085861B (en) | A kind of device of reclaim(ed) sulfuric acid from Graphene acid-bearing wastewater and corresponding technique thereof | |
| CN204630411U (en) | A kind of distiller condensing unit | |
| CN104864376B (en) | Heat-pipe type falling film evaporation low-temperature waste heat utilization and water recovery equipment | |
| CN208308431U (en) | A kind of VCM purification hydrochloric acid full stripping device | |
| CN204806354U (en) | Heat pipe formula falling film evaporation low temperature waste heat utilization and water -recovery apparatus | |
| CN207575810U (en) | Sulphuric acid concentration system | |
| CN110422827A (en) | A kind of the Waste Sulfuric Acid recycling device and technique of dry chlorine gas | |
| CN108671571A (en) | Phosphoric Acid Concentration system and technique | |
| CN107501126B (en) | The method and system of high efficiente callback acrylonitrile in a kind of production of high-performance carbon fibre | |
| CN203938481U (en) | A kind of from Graphene acid-bearing wastewater the device of reclaim(ed) sulfuric acid | |
| CN102020327A (en) | Ammonia nitrogen waste water treatment equipment | |
| CN205586744U (en) | Modular improve graphite hydrochloric acid desorber | |
| CN205886542U (en) | Two -stage process tail gas processing device in chlorobenzene production | |
| CN204563881U (en) | A kind of high-concentration formaldehyde absorption tower | |
| CN206980496U (en) | A kind of dilute sulfuric acid production equipment | |
| CN109355082B (en) | Packing type tar distillation tower | |
| CN205252583U (en) | Sulphuric acid steam condensate concentration tower | |
| CN208553184U (en) | Packed tower barrel structure and stuffing rectification column | |
| CN206654756U (en) | The adsorption system of phenmethylol in a kind of circulation and stress industrial wastewater | |
| CN202909473U (en) | Negative pressure distillation tower for extracting crude benzene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190129 Effective date of abandoning: 20230718 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190129 Effective date of abandoning: 20230718 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |