CN208218410U - A kind of dilute sulfuric acid vacuum concentrating apparatus - Google Patents
A kind of dilute sulfuric acid vacuum concentrating apparatus Download PDFInfo
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- CN208218410U CN208218410U CN201820720832.4U CN201820720832U CN208218410U CN 208218410 U CN208218410 U CN 208218410U CN 201820720832 U CN201820720832 U CN 201820720832U CN 208218410 U CN208218410 U CN 208218410U
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Abstract
The utility model relates to a kind of dilute sulfuric acid vacuum concentrating apparatus, boiler and steam condensate (SC) circulating slot occurs including sour heat exchanger, level-one sulphuric acid concentration slot, second level sulphuric acid concentration slot, concentrated sulfuric acid circulating slot, circulation concentrated sulfuric acid cooler, level-one tail gas condenser, second level tail gas condenser, waste water collection tank, Electrothermic steam, sour heat exchanger is connected with level-one sulphuric acid concentration slot, level-one sulphuric acid concentration slot is connected with second level sulphuric acid concentration slot, and second level sulphuric acid concentration slot is connected with sour heat exchanger；Level-one tail gas condenser, second level tail gas condenser are connected with multistage steam ejector vacuum pump unit；Level-one sulphuric acid concentration slot, second level sulphuric acid concentration slot are connected with level-one sulfuric acid heater, second level sulfuric acid heater respectively, and level-one sulfuric acid heater is connected with low-pressure saturated steam outer tube, and second level sulfuric acid heater occurs boiler with Electrothermic steam and is connected.The utility model has many advantages, such as that at low cost, energy consumption is small, high treating effect, high reliablity, stable.
Description
Technical field
The utility model relates to a kind of enrichment facilities, more particularly, to a kind of dilute sulfuric acid vacuum concentrating apparatus.
Background technique
Stop domestic about 39,000,000 tons/year of total productive capacity of caustic soda (be included in and build production capacity) by the end of in December, 2017,
Actual output in 2017 is about 29,000,000 tons/year or so.Current domestic dry chlorine device is all made of sulfuric acid seasoning,
Sulfuric acid about 12~16KG of ton caustic soda consumption 98% was calculated, about by-product 34.8~46.4 ten thousand by caustic soda actual production in 2017
The Waste Sulfuric Acid of ton 75% or so.
In carbide synthesis VCM technique, hydrogen chloride gas drying and dehydrating is critically important process.Traditional chlorinated hydrogen dehydration
Using cryodrying technique, which is mainly aqueous height (300PPm or more) in hydrogen chloride gas, which brings to chloroethene
In alkene converter, catalyst consumption is caused to increase.Therefore, just becoming more and more PVC using concentrated sulfuric acid dry hydrogen chloride gas to look forward to
The selection of industry, through it is aqueous in the dry hydrogen chloride gas of the concentrated sulfuric acid can be down to 50PPm hereinafter, reducing the consumption of catalyst, favorably
In industry energy conservation emission reduction.The Waste Sulfuric Acid of current 90% concentration of country hydrogen chloride drying device ton PVC by-product about 5KG or so, by allusion quotation
250,000 tons of PVC/ annual capacities of type calculate, years about 1250 tons/year of 90% Waste Sulfuric Acid of by-product when full production.
Current chlor-alkali enterprises are main to the processing mode of the dry Waste Sulfuric Acid of hydrogen chloride to the dry Waste Sulfuric Acid of this chlorine and PVC enterprise
Be be sold to production chemical fertilizer enterprise for chemical fertilizer production or in carbide slurry and support gypsum outside sell.Since this chlorine is dry useless
0.2% or so chlorine is dissolved in acid, hydrogen chloride dries the hydrogen chloride gas in Waste Sulfuric Acid containing 0.13% or so, so than
Finished product sulfuric acid has stronger corrosivity, and the chlorine and hydrogen chloride to volatilize in transport, use process seriously pollutes environment.
The reason of restricting current dilute sulfuric acid concentration cycles utilize has three:
1, vacuum concentration technique for dilute sulphuric acid needs >=1.6Mpa (G) middle pressure steam, and chlor-alkali and factory of PVC enterprise are existing
Steam pressure be up to 1.0Mpa (G)；
2, contain free chlorine and hydrogen chloride in chlorine and the dry Waste Sulfuric Acid of hydrogen chloride, the corrosion resistance of vacuum pump set is proposed
High requirement.
3, the sulfuric acid heater of dilute sulfuric acid vacuum concentrating apparatus needs high temperature resistant sulfuric acid corrosion, and reliability requirement is high.
Utility model content
In order to overcome the shortcomings of the prior art, the utility model provide it is a kind of it is at low cost, energy consumption is small, treatment effect
Good, high reliablity, stable dilute sulfuric acid vacuum concentrating apparatus and method.
A kind of dilute sulfuric acid vacuum concentrating apparatus, described device include acid sour heat exchanger, level-one sulphuric acid concentration slot, second level sulfuric acid
Thickener, concentrated sulfuric acid circulating slot, circulation concentrated sulfuric acid cooler, level-one tail gas condenser, second level tail gas condenser, wastewater collection
Boiler and steam condensate (SC) circulating slot occur for slot, Electrothermic steam, and the sour heat exchanger of acid is connected with level-one sulphuric acid concentration slot,
The level-one sulphuric acid concentration slot is connected with second level sulphuric acid concentration slot, and the second level sulphuric acid concentration slot is connected with sour heat exchanger
Logical, the sour heat exchanger of acid is connected with concentrated sulfuric acid circulating slot, and the concentrated sulfuric acid circulating slot is connected with circulation concentrated sulfuric acid cooler
It is logical；
The level-one sulphuric acid concentration slot is connected with level-one tail gas condenser, the second level sulphuric acid concentration slot and second level tail gas
Condenser is connected, and the level-one tail gas condenser, second level tail gas condenser are sprayed with waste water collection tank and multistage steam respectively
Vacuum pump assembly is connected；
The level-one sulphuric acid concentration slot is connected with level-one sulfuric acid heater, and second level sulphuric acid concentration slot and second level sulfuric acid heat
Device is connected, and the level-one sulfuric acid heater is connected with 0.6~1.0Mpa saturated vapor outer tube, the second level sulfuric acid heater
With Electrothermic steam occur boiler be connected, the level-one sulfuric acid heater, second level sulfuric acid heater respectively with steam condensate (SC)
Circulating slot is connected.
Boiler occurs for the utility model Electrothermic steam, steam condensate (SC) circulating slot constitutes the generation of electric heating middle pressure steam
Unit, the very good solution existing steam pressure of current chlor-alkali and factory of PVC enterprise is up to 1.0Mpa (G) is not able to satisfy
The defect that existing vacuum concentration technique for dilute sulphuric acid requires.
Preferably, the sour heat exchanger of acid is connected by dilute sulfuric acid charge pump with dilute sulfuric acid storage tank.
Preferably, the concentrated sulfuric acid circulating slot is connected by concentrated sulfuric acid circulating pump with circulation concentrated sulfuric acid cooler.
Preferably, the steam condensate (SC) circulating slot is connected by the way that boiler occurs with Electrothermic steam to high-pressure water pump
It is logical.
Preferably, the multistage steam ejector vacuum pump unit is connected with 0.6~1.0Mpa saturated vapor outer tube.With
Factory common 0.6~1.0Mpa (G) low-pressure saturated steam is used as power source, and the concentrated cost of ton acid is effectively reduced.
Preferably, multiple enriched chambers are respectively equipped in the level-one sulphuric acid concentration slot, second level sulphuric acid concentration slot, it is adjacent dense
Partition is equipped between contracting room.Multiple indoor acid solution explosive evaporations at a lower temperature of concentration, concentration improve step by step in thickener,
The partition of enriched chambers at different levels prevents the reflux of acid solution, ensure that the maximum mean temperature difference between acid solution and heating tube, sufficiently benefit
With the heating surface (area) (HS of tantalum pipe surface, ensure that treated, sulfuric acid reaches technique requirement.
The multistage steam ejector vacuum pump unit is titanium three-level steam jet pump unit.Good corrosion resistance, reliability
Height solves the disadvantages that water ring vacuum pump price is high, poor reliability.
Contain free chlorine and hydrogen chloride in the dilute sulfuric acid that chlor-alkali and PVC factory generate, it is very strong to the corrosivity of vacuum pump set,
The liquid-ring vacuum pump of general material with this condition can not long-term operation, the pendular ring of flow passage components titanium matter and ceramic material is true
For sky pump due to material, high failure rate causes the entire dilute sulfuric acid vacuum concentrating apparatus utilization of capacity to decline.Therefore we are dilute
Introduced in sulphuric acid concentration new process titanium manufacture three-level vapor jet vacuum pump assembly, with factory common 0.6~
1.0Mpa (G) low-pressure saturated steam is used as power source, and entire unit does not have rotatable parts, and chlorine-containing gas flow passage components are all made of titanium
Manufacture, solves integrity problem, meets the requirement of new process device long period continuous operation.
Preferably, the manufacture of tantalum material is respectively adopted in the level-one sulfuric acid heater, second level sulfuric acid heater.High reliablity,
It is stable, heating enamel pipe or quartz-glass heating tube using direct electro heating are avoided, solution holds in high-temperature sulfuric acid
The shortcomings that easy burst porcelain or cracking.
The utility model level-one sulfuric acid heater makees heat source using 0.6~1.0MPa low-pressure saturated steam, and second level sulfuric acid adds
The middle pressure steam of hot device occurs boiler by Electrothermic steam and generates, the steaming of level-one sulfuric acid heater and the discharge of second level sulfuric acid heater
Vapour condensation water collection is recycled in steam condensate (SC) circulating slot.There is 0.6~1.0MP saturated vapor according to chlor-alkali and PVC factory
Actual conditions, using multi-stage PCE, the first order uses 0.6~1.0MP saturated vapor for heat source, reduce ton acid is condensed into
This；The middle pressure saturated vapor of 1.6Mpa (G)~2.0Mpa (G) can continuously and stably occur for heating steam generation boiler, simultaneously
Steam condensate (SC) circulating slot water resource can be carried out to steam condensate (SC) and portion of energy recycles, and saves energy to the maximum extent
Source consumption.
The utility model has the beneficial effects that:
1, unit, which occurs, for electric heating middle pressure steam not only can continuously and stably occur 1.6Mpa (G)~2.0Mpa (G)
Middle pressure saturated vapor, while water resource and portion of energy recycling are carried out to steam condensate (SC), it is energy saving to the maximum extent
Consumption；
2, there are the actual conditions of 0.6~1.0MPa low-pressure saturated steam according to chlor-alkali and PVC factory, using multi-stage PCE,
The first order uses 0.6~1.0MPa low-pressure saturated steam for heat source, reduces the concentrated cost of ton acid；
3, dilute sulfuric acid relative low temperature enriching section is designed, the water in the dilute sulfuric acid into enrichment facility about 48% or so in the section
Evaporation, this reduces the thermic loads for entering final enriching section, reduce electric consumption, save energy consumption to the maximum extent；
4, using multistage steam ejector vacuum pump unit, good corrosion resistance, high reliablity solves water ring vacuum pump price
The problem of height, poor reliability, meets the requirement of new process device long period continuous operation.
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 sulfuric acid vacuum concentrating apparatus, described device include acid sour heat exchanger 1, level-one sulphuric acid concentration slot
2, second level sulphuric acid concentration slot 3, concentrated sulfuric acid circulating slot 4, circulation concentrated sulfuric acid cooler 5, level-one tail gas condenser 6, second level tail gas are cold
Boiler 10 occurs for condenser 7, waste water collection tank 8, multistage steam ejector vacuum pump unit 9, Electrothermic steam and steam condensate (SC) follows
Annular groove 11, the sour heat exchanger 1 of acid are connected with level-one sulphuric acid concentration slot 2, and the level-one sulphuric acid concentration slot 2 is dense with second level sulfuric acid
Contracting slot 3 is connected, and the second level sulphuric acid concentration slot 3 is connected with sour heat exchanger 1, and the sour heat exchanger 1 of acid is followed with the concentrated sulfuric acid
Annular groove 4 is connected, and the concentrated sulfuric acid circulating slot 4 is connected with circulation concentrated sulfuric acid cooler 5；
The level-one sulphuric acid concentration slot 2 is connected with level-one tail gas condenser 6, the second level sulphuric acid concentration slot 3 and second level
Tail gas condenser 7 is connected, the level-one tail gas condenser 6, second level tail gas condenser 7 respectively with waste water collection tank 8 and multistage
Vapor jet vacuum pump assembly 9 is connected；
The level-one sulphuric acid concentration slot is connected with level-one sulfuric acid heater 12, and second level sulphuric acid concentration slot adds with second level sulfuric acid
Hot device 13 is connected, and the level-one sulfuric acid heater 12 is connected with 0.6~1.0Mpa saturated vapor outer tube, the second level sulfuric acid
Heater 13 and Electrothermic steam occur boiler 10 and are connected, the level-one sulfuric acid heater, second level sulfuric acid heater respectively with
Steam condensate (SC) circulating slot 11 is connected.
Boiler 10 occurs for the utility model Electrothermic steam, steam condensate (SC) circulating slot 11 constitutes electric heating middle pressure steam
Unit occurs, the very good solution existing steam pressure of current chlor-alkali and factory of PVC enterprise is up to 1.0Mpa (G) cannot expire
The defect that the existing vacuum concentration technique for dilute sulphuric acid of foot requires.1.6Mpa (G)~2.0Mpa can continuously and stably occur for the unit
(G) middle pressure saturated vapor, while water resource and portion of energy recycling are carried out to steam condensate (SC), it saves to the maximum extent
Energy consumption.
The sour heat exchanger 1 of acid is connected by dilute sulfuric acid charge pump 14 with dilute sulfuric acid storage tank, the concentrated sulfuric acid circulating slot 4
It is connected by concentrated sulfuric acid circulating pump 15 with circulation concentrated sulfuric acid cooler 5.The steam condensate (SC) circulating slot 11 passes through water supply height
Press pump 16 occurs boiler 10 with Electrothermic steam and is connected.
The multistage steam ejector vacuum pump unit is connected with 0.6~1.0Mpa saturated vapor outer tube.It is common with factory
0.6~1.0Mpa (G) low-pressure saturated steam be used as power source, the concentrated cost of ton acid is effectively reduced.
Multiple enriched chambers are respectively equipped in the level-one sulphuric acid concentration slot, second level sulphuric acid concentration slot, between adjacent enriched chamber
Equipped with partition 17.Multiple indoor acid solution explosive evaporations at a lower temperature of concentration, concentration improve step by step in thickener, Ge Jinong
The partition of contracting room prevents the reflux of acid solution, ensure that the maximum mean temperature difference between acid solution and heating tube, takes full advantage of tantalum
The heating surface (area) (HS of pipe surface, ensure that treated, sulfuric acid reaches technique requirement.
The multistage steam ejector vacuum pump unit 9 is titanium three-level steam jet pump unit, good corrosion resistance, reliability
Height solves the disadvantages that water ring vacuum pump price is high, poor reliability.
Contain free chlorine and hydrogen chloride in the dilute sulfuric acid that chlor-alkali and PVC factory generate, it is very strong to the corrosivity of vacuum pump set,
The liquid-ring vacuum pump of general material with this condition can not long-term operation, the pendular ring of flow passage components titanium matter and ceramic material is true
For sky pump due to material, high failure rate causes the entire dilute sulfuric acid vacuum concentrating apparatus utilization of capacity to decline.Therefore we are dilute
Introduced in sulphuric acid concentration new process titanium manufacture three-level vapor jet vacuum pump assembly, with factory common 0.6~
1.0Mpa (G) low-pressure saturated steam is used as power source, and entire unit does not have rotatable parts, and chlorine-containing gas flow passage components are all made of titanium
Manufacture, solves integrity problem, meets the requirement of new process device long period continuous operation.
The manufacture of tantalum material is respectively adopted in the level-one sulfuric acid heater 2, second level sulfuric acid heater 3.High reliablity, operation are steady
It is fixed, the heating enamel pipe or quartz-glass heating tube using direct electro heating are avoided, solution is easy burst porcelain in high-temperature sulfuric acid
Or the shortcomings that cracking.
Above-mentioned apparatus is in use, include the following steps:
(1) 65~75% dilute sulfuric acid clear liquid enters the sour heat exchanger 1 of acid, benefit after the pressurised metered control of dilute sulfuric acid charge pump 14
The waste heat preheating material diluted acid of high-temperature concentrated sulfuric acid is discharged with second level sulphuric acid concentration slot 3, subsequently into level-one sulphuric acid concentration slot 2,
Under vacuum condition, multiple indoor acid solution explosive evaporations at a lower temperature of concentration, concentration improve step by step in thickener, Ge Jinong
The partition of contracting room prevents the reflux of acid solution, ensure that the maximum mean temperature difference between acid solution and heating tube, takes full advantage of tantalum
The heating surface (area) (HS of pipe surface, so that the sulfuric acid for flowing out afterbody enriched chamber reaches technique concentration 85~88%；
(2) 85~88% acid automatic overflow under potential difference effect enters in second level sulphuric acid concentration slot 3, in more high vacuum condition
Under, multiple indoor acid solution explosive evaporations at a lower temperature of concentration, concentration improve step by step in thickener, and it is dense to be finally reached technique
Du≤96%；Excessive spout enters concentrated sulfuric acid circulating slot 4 after entering sour heat exchanger 1 and the heat exchange of low temperature feedstock dilute sulfuric acid clear liquid,
It is recycled concentrated sulfuric acid cooler 5 and is cooled to 40 DEG C hereinafter, sending out battery limit (BL)；
(3) steam containing sour water that level-one sulphuric acid concentration slot 2 generates enters level-one tail gas condenser 6, vapor major part quilt
It condenses and separates, overflow enters waste water collection tank 8, and fixed gas, sour gas and a small amount of vapor are sprayed true by titanium three-level steam
The purification of accident chlorine tail gas tower is sent into the empty discharge of pump assembly 9；The steam containing sour water that second level sulphuric acid concentration slot 3 generates enters second level tail
Gas condenser 7, vapor are largely condensed separation, and overflow enters waste water collection tank 8, fixed gas, sour gas and a small amount of water
Steam is discharged by titanium three-level vapor jet vacuum pump assembly is sent into the purification of accident chlorine tail gas tower.
Level-one sulfuric acid heater makees heat source using 0.6~1.0Mpa low-pressure saturated steam, what second level sulfuric acid heater needed
Middle pressure steam 1.6Mpa (G) occurs boiler by Electrothermic steam and generates, level-one sulfuric acid heater and the discharge of second level sulfuric acid heater
Steam condensate (SC) collection recycled in steam condensate (SC) circulating slot.There is 0.6~1.0Mpa full according to chlor-alkali and PVC factory
With the actual conditions of steam, using multi-stage PCE, the first order uses 0.6~1.0Mpa saturated vapor for heat source, reduces ton acid
Concentrated cost；Heating steam generation boiler can continuously and stably occur 1.6Mpa (G)~2.0Mpa (G) middle pressure saturation and steam
Vapour, while steam condensate (SC) circulating slot water resource can be carried out to steam condensate (SC) and portion of energy recycles, to greatest extent
Ground saves energy consumption.
Claims (7)
1. a kind of dilute sulfuric acid vacuum concentrating apparatus, it is characterised in that: described device includes acid sour heat exchanger, level-one sulphuric acid concentration
Slot, second level sulphuric acid concentration slot, concentrated sulfuric acid circulating slot, circulation concentrated sulfuric acid cooler, level-one tail gas condenser, second level tail gas condensing
Boiler and steam condensate (SC) circulating slot occur for device, waste water collection tank, Electrothermic steam, and the acid acid heat exchanger and level-one sulfuric acid are dense
Contracting slot is connected, and the level-one sulphuric acid concentration slot is connected with second level sulphuric acid concentration slot, the second level sulphuric acid concentration slot and acid acid
Heat exchanger is connected, and the sour heat exchanger of acid is connected with concentrated sulfuric acid circulating slot, the concentrated sulfuric acid circulating slot and the circulation concentrated sulfuric acid
Cooler is connected；
The level-one sulphuric acid concentration slot is connected with level-one tail gas condenser, the second level sulphuric acid concentration slot and second level tail gas condensing
Device is connected, and the level-one tail gas condenser, second level tail gas condenser spray vacuum with waste water collection tank and multistage steam respectively
Pump assembly is connected；
The level-one sulphuric acid concentration slot is connected with level-one sulfuric acid heater, second level sulphuric acid concentration slot and second level sulfuric acid heater phase
Connection, the level-one sulfuric acid heater are connected with 0.6~1.0Mpa saturated vapor outer tube, the second level sulfuric acid heater and electricity
Heating steam generation boiler is connected, and the level-one sulfuric acid heater, second level sulfuric acid heater are recycled with steam condensate (SC) respectively
Slot is connected.
2. dilute sulfuric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the sour heat exchanger of acid passes through dilute sulphur
Sour charge pump is connected with dilute sulfuric acid storage tank.
3. dilute sulfuric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the concentrated sulfuric acid circulating slot passes through dense
Sulfuric acid circulating pump is connected with circulation concentrated sulfuric acid cooler.
4. dilute sulfuric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the steam condensate (SC) circulating slot is logical
It crosses and is connected to high-pressure water pump with Electrothermic steam generation boiler.
5. dilute sulfuric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the multistage steam ejector vacuum pump
Unit is connected with 0.6~1.0Mpa saturated vapor outer tube.
6. dilute sulfuric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the level-one sulphuric acid concentration slot, two
It is respectively equipped with multiple enriched chambers in grade sulphuric acid concentration slot, is equipped with partition between adjacent enriched chamber.
7. dilute sulfuric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the multistage steam ejector vacuum pump
Unit is titanium three-level steam jet pump unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820720832.4U CN208218410U (en) | 2018-05-15 | 2018-05-15 | A kind of dilute sulfuric acid vacuum concentrating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820720832.4U CN208218410U (en) | 2018-05-15 | 2018-05-15 | A kind of dilute sulfuric acid vacuum concentrating apparatus |
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| CN208218410U true CN208218410U (en) | 2018-12-11 |
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| CN201820720832.4U Withdrawn - After Issue CN208218410U (en) | 2018-05-15 | 2018-05-15 | A kind of dilute sulfuric acid vacuum concentrating apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358176A (en) * | 2018-05-15 | 2018-08-03 | 杭州东日节能技术有限公司 | A kind of dilute sulfuric acid vacuum concentrating apparatus and method |
| RU223173U1 (en) * | 2023-12-22 | 2024-02-05 | Общество с ограниченной ответственностью "Торговый Дом "ХИММЕД" | QUARTZ REACTOR FOR PRODUCING SULFURIC ACID OF AZEOTROPIC COMPOSITION |
-
2018
- 2018-05-15 CN CN201820720832.4U patent/CN208218410U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358176A (en) * | 2018-05-15 | 2018-08-03 | 杭州东日节能技术有限公司 | A kind of dilute sulfuric acid vacuum concentrating apparatus and method |
| CN108358176B (en) * | 2018-05-15 | 2023-05-05 | 杭州东日节能技术有限公司 | Dilute sulfuric acid vacuum concentrating device and method |
| RU223173U1 (en) * | 2023-12-22 | 2024-02-05 | Общество с ограниченной ответственностью "Торговый Дом "ХИММЕД" | QUARTZ REACTOR FOR PRODUCING SULFURIC ACID OF AZEOTROPIC COMPOSITION |
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