CN108358232A - High chlorine desulfurated plaster washing methods - Google Patents
High chlorine desulfurated plaster washing methods Download PDFInfo
- Publication number
- CN108358232A CN108358232A CN201711443367.0A CN201711443367A CN108358232A CN 108358232 A CN108358232 A CN 108358232A CN 201711443367 A CN201711443367 A CN 201711443367A CN 108358232 A CN108358232 A CN 108358232A
- Authority
- CN
- China
- Prior art keywords
- belt
- vacuum
- filter cake
- water
- gypsum
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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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/468—Purification of calcium sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- 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
Abstract
The present invention relates to a kind of high chlorine desulfurated plaster washing methods, high chlorine gypsum washing is washed by vacuum belt dewatering system, chloride ion content is improved by normal 20000PPm concentration to 50000PPm in the gypsum slurries in source, to ensure belt dewaterer normal operation and ensureing gypsum qualitt, filter cake rinses water circulation use.
Description
Technical field
The present invention relates to the corollary equipments and method of the high chlorine desulfurization wastewater technique of zero discharge of boiler, relate more specifically to one kind
The desulfurated plaster washing methods of high chlorine operation.
Background technology
Lime stone (lime)-gypsum wet desulfurization is the major way of current electric power and coloured industry flue gas desulfurization, it has
Have the advantages that technical maturity is reliable, desulfuration efficiency is high, desulfurizing agent raw material sources are abundant, by-produced gypsum can comprehensively utilize.It is existing
Wet desulphurization industry is generally acknowledged that gypsum slurries institute chloride ion-containing is not only big to equipment corrosion, and chloride ion content is more than design value
It has a certain impact to gypsum qualitt, while desulfuration efficiency can be reduced.Thus wet desulphurization designs chlorion in 20000mg/l
Below.Usual common lime stone-ammonia-plaster mode desulphurization system operation chlorine ion concentration control is between 5000~20000ppm, desulfurization
System maintains chlorion and system run all right by efflux wastewater, because operation chlorine ion concentration is not high, leads to efflux wastewater
Measure larger, the investment of this kind of project implementation wastewater zero discharge and operating cost are high, pass through film concentration systems first (investment is very big)
Waste water chlorion is concentrated and reduces waste water total amount, then wastewater zero discharge is realized by evaporative crystallization technique.
In above-mentioned wet desulfurizing process, the generation of gypsum product is one of intermediate portions.The quality of gypsum product quality,
It decides the biochemical indicator of discharge liquor, impurity content and post-processing production cost etc., is the most key link.Currently, gypsum
The unripe technique of production link and complete set of equipments, technological parameter is not specific, and mating equipment is also unsound, causes most of
In the situation that producer gropes still in technology at present, either to critical process route or main technologic parameters, even match
The not no concept of sharpening such as the specific requirement of complete equipment and correlation, so that limestone/lime-gypsum wet method
The quality of gypsum product in sulfur removal technology cannot tell the good from the bad, and quality grade difference is very big.Due to there is no concrete technology and system to make
To compare, therefore the improvement that can not be also directed to gypsum product quality proposes complete, reliable scheme, on the one hand so that the city of enterprise
Field competitiveness reduces, and on the other hand also causes the impurity content in discharge liquor high, biochemical indicator is high, larger to environmental threat.Stone
Lime stone-desulfurization of gypsum is by after gas cleaning, and the various pollutants in process water and flue gas are enriched in waste water system, by three
Case treated waste water still contains a large amount of Cl-, SO42-, Mg2+, Ca2+, micro heavy etc., and directly outer row can destroy soil
Earth ecology influences aquatile and earth's surface and underground water source.With ten, China's water and《Fire coal energy-saving emission-reducing and transformation are taken action
Plan》Promulgation, country industrial enterprise's water consumption and disposal of pollutants policy are gradually tightened.Desulfurization wastewater zero-emission becomes must
Right trend.
Invention content
Therefore, for the drawbacks described above for having technology, the present invention proposes that improving desulphurization system runs chlorine ion concentration, by desulfurization
System chlorine ion concentration is promoted to 20000~50000ppm, and high chlorine operation desulphurization system reduces efflux wastewater total amount, implements waste water
Zero-emission need not use film concentration systems, and evaporative crystallization is directly used to realize that wastewater zero discharge, operating cost simple for process are low.
A kind of high chlorine desulfurated plaster washing methods, high chlorine gypsum washing are washed by vacuum belt dewatering system, are come
Chloride ion content is improved by normal 20000PPm concentration to 50000PPm in the gypsum slurries in source, to ensure that belt dewaterer is normal
Operation and guarantee gypsum qualitt, filter cake rinse water circulation use.
In vacuum belt dewatering system, the belt of vacuum belt dewaterer drags continuous fortune by variable-frequency motor through reduction box
Row, filter cloth are run simultaneously by the frictional force between belt with motor, belt and vacuum tank sliding contact, when vacuum pump work,
Vacuum tank under belt forms vacuum filtration area, and slurry is evenly dispersed to through feeding equipment on mobile filter cloth, and slurry is true
It realizes and is separated by solid-liquid separation under the action of sky, filtrate passes through filter cloth to converge through belt traverse furrow slot, enters vacuum tank through belt centre bore, so
It is discharged afterwards by vapour liquid separator；
The filter cake that slurry is formed after filtering simultaneously, which is advanced forward, receives washing, and again through vacuum suction, until in discharging rod
Regeneration is obtained through rinsing in place by scraper removal, filter cloth and belt when returning；The water that gas-liquid separator excludes, which is pooled to, to be separately provided
Recycling melt pit, the gas-liquid separation liquid of recycling beaten to filter cake by sump pump and elutes fore device, and elution back-end device water is by filtering
Cake flush box provides.
Filter cake rinse-system is arranged in vacuum belt dewatering system, and filter cake elution device is carried out different water according to actual conditions
Source matches.Filter cake rinses moisture two path water source and provides, and water source comes from filter cake flush box all the way, and water source comes from gas-liquid separation all the way
Liquid.Filter cake flush box water source comes from vacuum pump water ring water (industry water).Filter cake elution device setting 2 or multiple tracks, front end leaching
Cleaning device uses gas-liquid separation liquid, rear end elution device to use industry water.
Front end elution device water collects recycling melt pit by the gas-liquid separation liquid being separately provided and provides, the gas-liquid separation liquid of recycling
It is beaten to filter cake by sump pump and elutes fore device, the water after flushing is again introduced into system, recycles；Rear end elution device water
It is provided by filter cake flush box, filter cake flush box water is beaten to vacuum belt dewaterer rear end to elute and be filtered by filter cake flush water pump
On cake device.Filter cake flushing water in filter cake flush box derives from vacuum pump water ring water, and water ring water is provided by industry water.
Technical scheme has the following advantages that：Under high chloride ion environment, to ensure final gypsum qualitt, need by
The gypsum of high chlorine is washed.It can ensure the content of CL ions in filter cake, filter cake by improving the flow of filter cake flushing water
Flusher position is adjustable, and flush position can be adjusted according to filter cake actual state to reach preferable effect.Washing water quantity
Adjustment can be determined according to filter cake ion concentration containing Cl situation when actual motion.
Filter cake flushing water source is changed, vacuum belt dewatering system internal water is recycled, and is reduced and is entered system
Water.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below, it is clear that described embodiment is new to this
The description of type objective must not be considered the concrete restriction of the utility model protection domain.It should be understood that any in the utility model objective
The adjustment made, which is specifically arranged, to high-temperature flue gas bypass in range to fall within the protection domain of the utility model.
A kind of high chlorine desulfurated plaster washing methods, high chlorine gypsum washing are washed by vacuum belt dewatering system, are come
Chloride ion content is improved by normal 20000PPm concentration to 50000PPm in the gypsum slurries in source, to ensure that belt dewaterer is normal
Operation and guarantee gypsum qualitt, filter cake rinse water circulation use.
In vacuum belt dewatering system, the belt of vacuum belt dewaterer drags continuous fortune by variable-frequency motor through reduction box
Row, filter cloth are run simultaneously by the frictional force between belt with motor, belt and vacuum tank sliding contact, when vacuum pump work,
Vacuum tank under belt forms vacuum filtration area, and slurry is evenly dispersed to through feeding equipment on mobile filter cloth, and slurry is true
It realizes and is separated by solid-liquid separation under the action of sky, filtrate passes through filter cloth to converge through belt traverse furrow slot, enters vacuum tank through belt centre bore, so
It is discharged afterwards by vapour liquid separator；
The filter cake that slurry is formed after filtering simultaneously, which is advanced forward, receives washing, and again through vacuum suction, until in discharging rod
Regeneration is obtained through rinsing in place by scraper removal, filter cloth and belt when returning；The water that gas-liquid separator excludes, which is pooled to, to be separately provided
Recycling melt pit, the gas-liquid separation liquid of recycling beaten to filter cake by sump pump and elutes fore device, and elution back-end device water is by filtering
Cake flush box provides.
Filter cake rinse-system is arranged in vacuum belt dewatering system, and filter cake elution device is carried out different water according to actual conditions
Source matches.Filter cake rinses moisture two path water source and provides, and water source comes from filter cake flush box all the way, and water source comes from gas-liquid separation all the way
Liquid.Filter cake flush box water source comes from vacuum pump water ring water (industry water).Filter cake elution device setting 2 or multiple tracks, front end leaching
Cleaning device uses gas-liquid separation liquid, rear end elution device to use industry water.
Front end elution device water collects recycling melt pit by the gas-liquid separation liquid being separately provided and provides, the gas-liquid separation liquid of recycling
It is beaten to filter cake by sump pump and elutes fore device, the water after flushing is again introduced into system, recycles；Rear end elution device water
It is provided by filter cake flush box, filter cake flush box water is beaten to vacuum belt dewaterer rear end to elute and be filtered by filter cake flush water pump
On cake device.Filter cake flushing water in filter cake flush box derives from vacuum pump water ring water, and water ring water is provided by industry water.
Under high chloride ion environment, to ensure final gypsum qualitt, the gypsum by high chlorine is needed to wash.It can be by carrying
The flow of high filter cake flushing water ensures the content of CL ions in filter cake, and filter cake flusher position is adjustable, can be according to filter cake
Actual state adjusts flush position to reach preferable effect.The adjustment of washing water quantity can contain Cl according to filter cake when actual motion
Ion concentration situation determines.
Vacuum belt dewaterer upper end setting 2 or multiple tracks elution device, adjust elution device washing water quantity and hydraulic pressure, adjust
Whole flooding nozzle model, the configuration of matched modification filter cake flush water pump, and adjust vacuum pump and gas-liquid separator according to actual conditions
System.
The selection of elution device position is adjusted according to actual conditions, and filter cake rinses simultaneously can be to avoid dewatered filter
Cake cracks, and avoids leakage vacuum.
In the present embodiment, the index of gypsum is as follows：
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (2)
1. a kind of high chlorine desulfurated plaster washing methods, it is characterised in that：The washing of high chlorine gypsum by vacuum belt dewatering system into
Row washs, and chloride ion content is improved by normal 20000PPm concentration to 50000PPm in the gypsum slurries in source, to ensure belt
Dewaterer normal operation and guarantee gypsum qualitt, filter cake rinse water circulation use.
2. a kind of high chlorine desulfurated plaster washing methods according to claim 1, it is characterised in that：Vacuum belt dewatering system
In, the belt of vacuum belt dewaterer drags continuous operation by variable-frequency motor through reduction box, and filter cloth is by the frictional force between belt
It is run simultaneously with motor, belt and vacuum tank sliding contact, when vacuum pump work, the vacuum tank under belt forms vacuum filtration
Area, slurry are evenly dispersed to through feeding equipment on mobile filter cloth, and slurry realizes separation of solid and liquid, filtrate under the action of vacuum
Converge through belt traverse furrow slot across filter cloth, enters vacuum tank through belt centre bore, be then discharged by vapour liquid separator；
The filter cake that slurry is formed after filtering, which is advanced forward, receives washing, and again through vacuum suction, until by scraper at discharging rod
Removal, filter cloth and belt obtain regeneration when returning through rinsing；The water that gas-liquid separator excludes is with being pooled to the recycling being separately provided
Hole, the gas-liquid separation liquid of recycling, which is beaten by sump pump to filter cake, elutes fore device, and elution back-end device water is by filter cake flushing water
Case provides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711443367.0A CN108358232A (en) | 2017-12-27 | 2017-12-27 | High chlorine desulfurated plaster washing methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711443367.0A CN108358232A (en) | 2017-12-27 | 2017-12-27 | High chlorine desulfurated plaster washing methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108358232A true CN108358232A (en) | 2018-08-03 |
Family
ID=63010342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711443367.0A Pending CN108358232A (en) | 2017-12-27 | 2017-12-27 | High chlorine desulfurated plaster washing methods |
Country Status (1)
| Country | Link |
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| CN (1) | CN108358232A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981147A (en) * | 2019-12-27 | 2020-04-10 | 四川能为环保科技有限公司 | Sludge dewatering method |
| CN111620360A (en) * | 2020-06-30 | 2020-09-04 | 大唐环境产业集团股份有限公司 | Desulfurization gypsum cleaning water recycling method and system |
| CN111659661A (en) * | 2020-06-15 | 2020-09-15 | 中国计量大学 | Efficient water-saving gypsum chloride ion control system and method |
| CN111847494A (en) * | 2020-07-31 | 2020-10-30 | 孙晋麟 | Solid waste reduction and gypsum dechlorination combined treatment device in desulfurization wastewater |
| CN112194163A (en) * | 2020-10-29 | 2021-01-08 | 西安热工研究院有限公司 | Desulfurization gypsum black surface layer removing system and method |
| CN111847494B (en) * | 2020-07-31 | 2024-04-26 | 孙晋麟 | Combined treatment device for reducing solid waste in desulfurization wastewater and dechlorinating gypsum |
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| CN1219440A (en) * | 1997-11-04 | 1999-06-16 | 三菱重工业株式会社 | Belt filter |
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| CN102741168A (en) * | 2010-02-26 | 2012-10-17 | 三菱重工业株式会社 | Gypsum dewatering device for desulfurization facility |
| CN104445337A (en) * | 2014-10-28 | 2015-03-25 | 广东南方碱业股份有限公司 | Method for preparing low-chloride gypsum by using ammonia-soda distillation waste liquid and brine |
| CN104707466A (en) * | 2015-03-30 | 2015-06-17 | 赵民 | Water-balance energy-saving and water-saving system for wet desulphurization of limestone/lime |
| CN205516820U (en) * | 2016-01-27 | 2016-08-31 | 陕西正大自动化工程有限公司 | Filter of vertical spin dehydrating of desulfurized gypsum machine structure |
| CN205516819U (en) * | 2016-01-27 | 2016-08-31 | 陕西正大自动化工程有限公司 | Desulfurized gypsum cell body of vertical spin dehydrating of desulfurized gypsum machine |
| CN206138807U (en) * | 2016-11-11 | 2017-05-03 | 华能伊敏煤电有限责任公司 | Desulfurization system's silt discharge system |
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2017
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219440A (en) * | 1997-11-04 | 1999-06-16 | 三菱重工业株式会社 | Belt filter |
| CN1597069A (en) * | 2004-08-27 | 2005-03-23 | 北京国电龙源环保工程有限公司 | By product gymsum continuous dehydration method and device in smoke desulfurization process |
| CN102741168A (en) * | 2010-02-26 | 2012-10-17 | 三菱重工业株式会社 | Gypsum dewatering device for desulfurization facility |
| CN104445337A (en) * | 2014-10-28 | 2015-03-25 | 广东南方碱业股份有限公司 | Method for preparing low-chloride gypsum by using ammonia-soda distillation waste liquid and brine |
| CN104707466A (en) * | 2015-03-30 | 2015-06-17 | 赵民 | Water-balance energy-saving and water-saving system for wet desulphurization of limestone/lime |
| CN205516820U (en) * | 2016-01-27 | 2016-08-31 | 陕西正大自动化工程有限公司 | Filter of vertical spin dehydrating of desulfurized gypsum machine structure |
| CN205516819U (en) * | 2016-01-27 | 2016-08-31 | 陕西正大自动化工程有限公司 | Desulfurized gypsum cell body of vertical spin dehydrating of desulfurized gypsum machine |
| CN206138807U (en) * | 2016-11-11 | 2017-05-03 | 华能伊敏煤电有限责任公司 | Desulfurization system's silt discharge system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981147A (en) * | 2019-12-27 | 2020-04-10 | 四川能为环保科技有限公司 | Sludge dewatering method |
| CN111659661A (en) * | 2020-06-15 | 2020-09-15 | 中国计量大学 | Efficient water-saving gypsum chloride ion control system and method |
| CN111620360A (en) * | 2020-06-30 | 2020-09-04 | 大唐环境产业集团股份有限公司 | Desulfurization gypsum cleaning water recycling method and system |
| CN111847494A (en) * | 2020-07-31 | 2020-10-30 | 孙晋麟 | Solid waste reduction and gypsum dechlorination combined treatment device in desulfurization wastewater |
| CN111847494B (en) * | 2020-07-31 | 2024-04-26 | 孙晋麟 | Combined treatment device for reducing solid waste in desulfurization wastewater and dechlorinating gypsum |
| CN112194163A (en) * | 2020-10-29 | 2021-01-08 | 西安热工研究院有限公司 | Desulfurization gypsum black surface layer removing system and method |
| CN112194163B (en) * | 2020-10-29 | 2024-01-23 | 西安热工研究院有限公司 | System and method for removing black surface layer of desulfurized gypsum |
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Application publication date: 20180803 |