CN105169727A - Evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene - Google Patents
Evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene Download PDFInfo
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- CN105169727A CN105169727A CN201510571109.5A CN201510571109A CN105169727A CN 105169727 A CN105169727 A CN 105169727A CN 201510571109 A CN201510571109 A CN 201510571109A CN 105169727 A CN105169727 A CN 105169727A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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Abstract
The invention relates to an evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene. Treatment of the diluted hydrochloric acid generated by chemical production belongs to a worldwide problem, and evaporation and concentration is the first choice for the treatment of the diluted hydrochloric acid, but due to too-high energy consumption and economic inappropriateness, the evaporation and concentration cannot be put into practice. According to a thermal energy comprehensive utilization principle, the evaporation and concentration system for the diluted hydrochloric acid generated by the production of the chlorinated polyethylene is connected and synchronized with chlorinated polyethylene normal production, i.e. on the basis of sufficiently utilizing the waste heat generated by the production of the chlorinated polyethylene, and a small amount of energy consumption is supplemented, the evaporation and concentration of the diluted hydrochloric acid generated by the production of the chlorinated polyethylene is completed; the evaporation and concentration system and process belong to the typical process of treatment of wastes with processes of the wastes against one another and energy conservation and emission reduction.
Description
Technical field
The invention belongs to chemical enterprise waste resource technology field, be specifically related to the evaporating and concentrating process of the watery hydrochloric acid that a kind of production of chlorinated polyethylene produces.
Background technology
The process of the watery hydrochloric acid (5 ~ 10%) that the large-scale haloflex enterprise based on chlorine industry produces belongs to global problem.The watery hydrochloric acid that certain haloflex enterprise domestic (120,000 tons of CPE/a) produces is taken as waste acid water after the neutralisation treatment of super-alkaline substance (lime stone or carbide slag) and discharges, required expense is approximately 7,000,000 yuan/a, not only increase the financial burden of enterprise, and be the huge wasting of resources.Therefore, the watery hydrochloric acid recovery technology that exploitation is applicable to, makes it resource, realizes waste hydrochloric acid zero-emission, have good economic benefit, also can promoting enterprise energy-saving and emission-reduction.
Evaporation and concentration is the first-selected processing method of watery hydrochloric acid, but cannot put into practice because energy consumption is too high, uneconomical economically; That is for the watery hydrochloric acid that haloflex enterprise produces, at home and abroad there is no the report of evaporation and concentration treatment process.Based on the comprehensive utilization principle of heat, watery hydrochloric acid evaporation and concentration combined with the heat supply of production of chlorinated polyethylene, making full use of on the basis producing used heat, supplementing less energy consumption, realizing watery hydrochloric acid evaporation and concentration, after concentrated, hydrochloric acid can be directly used in production.Therefore, the invention belongs to typical " treatment of wastes with processes of wastes against one another, energy-saving and emission-reduction " technique.
Summary of the invention
The evaporating and concentrating process of the watery hydrochloric acid that the object of the present invention is to provide a kind of production of chlorinated polyethylene to produce, combine with production of chlorinated polyethylene heat supply by watery hydrochloric acid evaporation and concentration, making full use of on the basis producing used heat, supplementing less energy consumption, realizing watery hydrochloric acid evaporation and concentration and reclaiming.
For achieving the above object, technical scheme of the present invention is achieved in that
System of the present invention comprises the chlorination tank be connected with PEF, chlorine, hydrochloric acid, the second blender vapours pipeline out respectively, the material outlet of chlorination tank is connected with filter, centrifuge, drier successively, drier is connected with cyclone separator, technique air generator pipeline respectively, and drier haloflex out reclaims abrasive dust packaging; Be connected with the first blender from chlorination tank waste hot steam pipeline out, be connected with the first blender by pipeline from drier used heat out; Be connected from the first blender waste hot steam pipeline out with the thermal fluid inlet of heat exchanger, condensate line is connected with exchanger heat fluid issuing and filter respectively; The diluted acid water that centrifuge obtains is connected with filter through pipeline; Be connected with heat exchanger cold fluid inlet through pipeline from filter diluted acid out, flow out from heat exchanger cold fluid outlet after diluted acid preheating and be connected with evaporimeter material inlet through pipeline; Be connected with alkali cleaning pond entrance from evaporator evaporation Low Temperature Steam out through pipeline, alkali cleaning pond Low Temperature Steam is out connected with the second blender through pipeline; Reclaim from evaporimeter concentrated acid out; The high-temperature steam that steam boiler produces is connected with the second blender by pipeline, and the second blender vapours is out connected with the vapours entrance of chlorination tank, evaporimeter and the vapours entrance of technique air generator respectively through pipeline; Pass into the vapours of technique air generator for air heat, become low temperature reflux steam after heat exchange and be connected with steam boiler through piping; Pass into the evaporation and concentration of vapours for diluted acid of evaporimeter, after heat exchange, become condensing hot air furnace; The vapours passing into chlorination tank heats for chlorination reaction, becomes waste hot steam and be connected with the first blender by pipeline after heat exchange; The air that blower fan transfers out becomes hot blast after entering the heating of technique air generator, and hot blast is connected with drier through piping, for the drying of haloflex, becomes used heat subsequently, sends into the first blender by pipeline.
The flowback steam of described technique air generator is connected with high-temperature steam boiler by the road.
Technique of the present invention is as follows: first, initial steam thermal source is become after the waste hot steam obtained after chlorination reaction in chlorination tank and the drier used heat based on hot blast out mixes after the first blender, preheating before supply filter diluted acid evaporation and concentration out, the diluted acid after preheating enters evaporimeter and obtains concentrated acid by vapours heating evaporation is concentrated; The high-temperature steam that the low-temperature steam be evaporated produces with boiler after alkali cleaning mixes, form chlorination tank and the vapours required for the normal production heat supply of technique wind and evaporator evaporation and concentrate vapours required for diluted acid, evaporimeter condensed water out directly outer row or as filter flushing supplementing water.
The present invention is based on the comprehensive utilization principle of heat, watery hydrochloric acid evaporation and concentration combined with the heat supply of production of chlorinated polyethylene, making full use of on the basis producing used heat, supplementing less energy consumption, realizing watery hydrochloric acid evaporation and concentration, after concentrated, hydrochloric acid can be directly used in production; Therefore, the invention belongs to typical " treatment of wastes with processes of wastes against one another, energy-saving and emission-reduction " technique.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See figure, system of the present invention comprises the chlorination tank be connected with PEF, chlorine, hydrochloric acid, the second blender vapours pipeline out respectively, the material outlet of chlorination tank is connected with filter, centrifuge, drier successively, drier is connected with cyclone separator, technique air generator pipeline respectively, and drier haloflex out reclaims abrasive dust packaging; Be connected with the first blender from chlorination tank waste hot steam pipeline out, be connected with the first blender by pipeline from drier used heat out; Be connected from the first blender waste hot steam pipeline out with the thermal fluid inlet of heat exchanger, condensate line is connected with exchanger heat fluid issuing and filter respectively; The diluted acid water that centrifuge obtains is connected with filter through pipeline; Be connected with heat exchanger cold fluid inlet through pipeline from filter diluted acid out, flow out from heat exchanger cold fluid outlet after diluted acid preheating and be connected with evaporimeter material inlet through pipeline; Be connected with alkali cleaning pond entrance from evaporator evaporation Low Temperature Steam out through pipeline, alkali cleaning pond Low Temperature Steam is out connected with the second blender through pipeline; Reclaim from evaporimeter concentrated acid out; The high-temperature steam that steam boiler produces is connected with the second blender by pipeline, and the second blender vapours is out connected with the vapours entrance of chlorination tank, evaporimeter and the vapours entrance of technique air generator respectively through pipeline; Pass into the vapours of technique air generator for air heat, become low temperature reflux steam after heat exchange and be connected with steam boiler through piping; Pass into the evaporation and concentration of vapours for diluted acid of evaporimeter, after heat exchange, become condensing hot air furnace; The vapours passing into chlorination tank heats for chlorination reaction, becomes waste hot steam and be connected with the first blender by pipeline after heat exchange; The air that blower fan transfers out becomes hot blast after entering the heating of technique air generator, and hot blast is connected with drier through piping, for the drying of haloflex, becomes used heat subsequently, sends into the first blender by pipeline.
First, (100 ~ 120 DEG C) initial steam thermal source is become after the waste hot steam (110 ~ 150 DEG C) obtained after chlorination reaction in chlorination tank and the drier used heat (90 ~ 110 DEG C) based on hot blast out mixes after the first blender, supply filter mass fraction is out the preheating before 5 ~ 9% watery hydrochloric acid (0 ~ 30 DEG C) evaporation and concentration, and the diluted acid (50 ~ 60 DEG C) after preheating is entered evaporimeter and concentrated by vapours heating evaporation and obtain the concentrated acid that mass fraction is 18 ~ 22%; 70 ~ 90 DEG C of low-temperature steams (hydrogen chloride containing minute quantity) be evaporated are that 380 ~ 420 DEG C of high-temperature steams mix with temperature after alkali cleaning, form the vapours (180 ~ 220 DEG C) that chlorination tank needs with the vapours (180 ~ 220 DEG C) required for the normal production heat supply of technique wind and evaporimeter.Evaporimeter condensed water is out directly outer to be arranged or rinses supplementing water as filter.
Certain enterprise produces haloflex 100,000 t/a.Vapours temperature required for chlorination tank and technique wind heat is 200 DEG C, 0.8MPa, 28t/h, 24.5 ten thousand t/a; The waste hot steam that chlorination tank is discharged is 130 DEG C, normal pressure, 14t/h, and the used heat that drier is discharged is 100 DEG C, normal pressure; Producing mass fraction is 7% watery hydrochloric acid 30t/h, and 270,000 t/a need alkali neutralisation treatment.
Primary Calculation shows, incorporates the high-temperature steam 400 DEG C after watery hydrochloric acid evaporation concentration system, 1.23MPa, 30t/h, 36.3 ten thousand t/a.Mass fraction is 7% watery hydrochloric acid is 0 DEG C (adjusting by winter temperature), 30t/h; The initial steam formed after the waste hot steam that chlorination tank is discharged mixes with the used heat that drier is discharged is 115 DEG C, normal pressure, 15 ~ 16t/h.Mass fraction after heat exchanger preheating is 7% watery hydrochloric acid temperature is 60 DEG C, enters evaporimeter (vacuum 0.053MPa) and is warming up to 80 DEG C and carries out evaporation and concentration; Control to reclaim hydrochloric acid mass fraction 20%, 8t/h; The Low Temperature Steam (80 DEG C produced, 0.053MPa, the HCl of contained trace 22t/h) is removed through alkali cleaning pond (NaOH solution) neutralization, subsequently with 400 DEG C, the high-temperature steam mixing of 1.23MPa, 30t/h, becomes 0.8MPa, 200 DEG C of vapours, 52t/h is respectively used to chlorination tank heating (14t/h), technique wind heat supply (14t/h) and evaporimeter heating (24t/h).When alkali wash water pH in alkali cleaning equipment enters electrolytic cell close to time neutral.
Reclaim the chlorination reaction that hydrochloric acid (mass fraction 20%) can be directly used in chlorination tank, also can pass into hydrogen chloride again and make industrial concentrated hydrochloric acid (mass fraction 30 ~ 35%) sale, remarkable in economical benefits.
Claims (3)
1. the evaporation concentration system of watery hydrochloric acid that produces of production of chlorinated polyethylene, it is characterized in that: comprise the chlorination tank be connected with PEF, chlorine, hydrochloric acid, the second blender vapours pipeline out respectively, the material outlet of chlorination tank is connected with filter, centrifuge, drier successively, drier is connected with cyclone separator, technique air generator pipeline respectively, and drier haloflex out reclaims abrasive dust packaging; Be connected with the first blender from chlorination tank waste hot steam pipeline out, be connected with the first blender by pipeline from drier used heat out; Be connected from the first blender waste hot steam pipeline out with the thermal fluid inlet of heat exchanger, condensate line is connected with exchanger heat fluid issuing and filter respectively; The diluted acid water that centrifuge obtains is connected with filter through pipeline; Be connected with heat exchanger cold fluid inlet through pipeline from filter diluted acid out, flow out from heat exchanger cold fluid outlet after diluted acid preheating and be connected with evaporimeter material inlet through pipeline; Be connected with alkali cleaning pond entrance from evaporator evaporation Low Temperature Steam out through pipeline, alkali cleaning pond Low Temperature Steam is out connected with the second blender through pipeline; Reclaim from evaporimeter concentrated acid out; The high-temperature steam that steam boiler produces is connected with the second blender by pipeline, and the second blender vapours is out connected with the vapours entrance of chlorination tank, evaporimeter and the vapours entrance of technique air generator respectively through pipeline; Pass into the vapours of technique air generator for air heat, become low temperature reflux steam after heat exchange and be connected with steam boiler through piping; Pass into the evaporation and concentration of vapours for diluted acid of evaporimeter, after heat exchange, become condensing hot air furnace; The vapours passing into chlorination tank heats for chlorination reaction, becomes waste hot steam and be connected with the first blender by pipeline after heat exchange; The air that blower fan transfers out becomes hot blast after entering the heating of technique air generator, and hot blast is connected with drier through piping, for the drying of haloflex, becomes used heat subsequently, sends into the first blender by pipeline.
2. the evaporation concentration system of watery hydrochloric acid that produces of production haloflex according to claim 1, is characterized in that: the flowback steam of described technique air generator is connected with high-temperature steam boiler by the road.
3. the evaporating and concentrating process of watery hydrochloric acid that produces of a production of chlorinated polyethylene, it is characterized in that: first, the waste hot steam obtained after chlorination reaction in chlorination tank and drier hot blast is out that main used heat becomes initial steam thermal source after the first blender mixes, preheating before supply filter diluted acid evaporation and concentration out, the diluted acid after preheating enters evaporimeter and obtains concentrated acid by vapours heating evaporation is concentrated; The high-temperature steam that the low-temperature steam be evaporated produces with boiler after alkali cleaning mixes, form chlorination tank and the vapours required for the normal production heat supply of technique wind and evaporator evaporation and concentrate vapours required for diluted acid, evaporimeter condensed water out directly outer row or as filter flushing supplementing water.
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| CN201510571109.5A CN105169727B (en) | 2015-09-09 | 2015-09-09 | Evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031503A (en) * | 1983-07-28 | 1985-02-18 | Osaka Soda Co Ltd | Production of chlorinated polyethylene rubber of good moldability |
| CN101463104A (en) * | 2008-12-27 | 2009-06-24 | 潍坊亚星集团有限公司 | Method for producing high chlorinated polyethylene |
| CN101698687A (en) * | 2009-11-06 | 2010-04-28 | 潍坊亚星集团有限公司 | Method for preparing high-rigidity chlorinated polyethylene |
| CN102532360A (en) * | 2011-12-27 | 2012-07-04 | 东营旭业化工有限公司 | Acid phase method production process for chlorinated polyethylene rubber |
| CN102603937A (en) * | 2012-04-09 | 2012-07-25 | 山东科院天力节能工程有限公司 | Flash drying and internal heated fluidized bed drying system and process special for chlorinated polyethylene |
| CN202576313U (en) * | 2012-04-09 | 2012-12-05 | 山东科院天力节能工程有限公司 | Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene |
| EP2816064A1 (en) * | 2013-04-19 | 2014-12-24 | LG Chem, Ltd. | Polyethylene with controlled wax content, chlorinated polyethylene thereof, and molded product prepared therefrom |
| CN104558305A (en) * | 2014-02-24 | 2015-04-29 | 江苏中煦高分子材料有限公司 | Process for synthesizing chlorinated polyvinyl chloride by virtue of acid-phase suspension method |
-
2015
- 2015-09-09 CN CN201510571109.5A patent/CN105169727B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031503A (en) * | 1983-07-28 | 1985-02-18 | Osaka Soda Co Ltd | Production of chlorinated polyethylene rubber of good moldability |
| CN101463104A (en) * | 2008-12-27 | 2009-06-24 | 潍坊亚星集团有限公司 | Method for producing high chlorinated polyethylene |
| CN101698687A (en) * | 2009-11-06 | 2010-04-28 | 潍坊亚星集团有限公司 | Method for preparing high-rigidity chlorinated polyethylene |
| CN102532360A (en) * | 2011-12-27 | 2012-07-04 | 东营旭业化工有限公司 | Acid phase method production process for chlorinated polyethylene rubber |
| CN102603937A (en) * | 2012-04-09 | 2012-07-25 | 山东科院天力节能工程有限公司 | Flash drying and internal heated fluidized bed drying system and process special for chlorinated polyethylene |
| CN202576313U (en) * | 2012-04-09 | 2012-12-05 | 山东科院天力节能工程有限公司 | Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene |
| EP2816064A1 (en) * | 2013-04-19 | 2014-12-24 | LG Chem, Ltd. | Polyethylene with controlled wax content, chlorinated polyethylene thereof, and molded product prepared therefrom |
| CN104558305A (en) * | 2014-02-24 | 2015-04-29 | 江苏中煦高分子材料有限公司 | Process for synthesizing chlorinated polyvinyl chloride by virtue of acid-phase suspension method |
Non-Patent Citations (2)
| Title |
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| 周维新等: "多效蒸发法回收利用废盐酸建设项目职业病危害因素识别与评价", 《职业与健康》 * |
| 孙安妮等: "废盐酸再生利用研究进展", 《当代化工》 * |
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