CN110282810A - A kind of graywater treating method in coal gasification scouring water recycling system - Google Patents
A kind of graywater treating method in coal gasification scouring water recycling system Download PDFInfo
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- CN110282810A CN110282810A CN201910708640.0A CN201910708640A CN110282810A CN 110282810 A CN110282810 A CN 110282810A CN 201910708640 A CN201910708640 A CN 201910708640A CN 110282810 A CN110282810 A CN 110282810A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/06—Flash evaporation
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Graywater treating method in a kind of coal gasification scouring water recycling system, comprising the following steps: S1, in gasification furnace-scrubber system, synthesis gas washing generates the gasification Heisui River containing a large amount of coal ash solid particles；S2, the most of solid particle of flash distillation workshop section removing is sent to after pressure reducing valve is depressured from gasification furnace-scrubber system high pressure Heisui River, then flocculant is added through subsider and settles to obtain clear buck.Buck adequately can be recycled and be utilized using technology by the coal gasification buck in the present invention; industrial water amount can be effectively reduced; it is more in line with the requirement of resource-conserving; important function has also been played to the protection of ecological environment simultaneously; a large amount of water resource can not only be saved; reduce consumption, moreover it is possible to bring the benefit of huge economy, while the pressure of downstream water sewage disposal device can be reduced.
Description
Technical field
The present invention relates to coal gasification washing water reutilization technology fields more particularly to a kind of coal gasification washing water to recycle system
Graywater treating method in system.
Background technique
In recent years, China's Modern Coal-based Chemical development achieves a series of important breakthroughs, has captured large-scale advanced coal gasification, big
Large quantities of technical problems such as the direct liquefaction of type ammonia from coal, coal.However, influence of the industry to environment and ecology is huge, to subtract
Few pollution of the coal chemical industry to atmosphere and water resource, it is necessary to greatly develop clean coal technology.Wherein, coal gasification is as most important and answer
It is to develop the most important monotechnics of Modern Coal-based Chemical with extensive clean coal technology.
Coal gasification course, using oxygen, vapor etc. as gasifying agent, is led under the high temperature conditions using coal or coal tar as raw material
Cross the technical process that chemical reaction converts the combustible constituent in coal or coal tar to imflammable gas.Currently, air flow bed is domestic
The Coal Gasification Technology of mainstream mainly has Texaco coal water slurry gasification (GE), Shell coal gasification and HT-L coal gasification 3
Kind.Although Novel gasification technique heavy industrialization, and can run steadily in the long term, slag water treatment system is complete not to the utmost
It is kind.Wherein, for the buck that coal gasification generates due to containing higher Ca2+ and Mg2+, water hardness is high, is easy to produce fouling under high temperature
Phenomenon causes the blocking of pipeline.In order to solve problem above, the measure that coal chemical industry enterprises mainly use is to increase outlet ash water
With increase fresh water amount, this can reduce the salinity of buck to a certain extent, slow down scaling rate, however it reduce ashes
The reclamation rate of water increases the operating cost of enterprise, does not meet the requirement of Modern Coal-based Chemical industry energy conservation emission reduction, meanwhile, largely
The sewage of outlet is also that the water processing establishment in downstream brings immense pressure, in addition, China's Situation of water resources is more severe, with warp
The fast development of Ji and significantly improving for living standards of the people, water resource is insufficient, and spatial and temporal distributions are uneven, infinity exploitation, no section
System waste, arbitrarily pollution and mismanagement, keep natively very nervous the contradiction of supply and demand for the water resource more sharp, the water resource in China
Contradiction is increasingly prominent, and not only the sustainable development to China brings significant impact, and seriously affect the people health and
Social stability
Therefore, the grey water hardness how is reduced, ash water recycling rate is improved, reduces fresh water consumption, production cost is reduced, is current coal
The difficult point that gasification enterprise faces, for this purpose, we have proposed the grey water process in a kind of coal gasification scouring water recycling system
Method solves the above problems.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of coal gasification washing water proposed is again
Utilize the graywater treating method in system.
To achieve the goals above, present invention employs following technical solutions:
A kind of graywater treating method in coal gasification scouring water recycling system, comprising the following steps:
S1, in gasification furnace-scrubber system, synthesis gas washing generate the gasification Heisui River containing a large amount of coal ash solid particles；
S2, flash distillation workshop section removing major part is sent to after pressure reducing valve is depressured from gasification furnace-scrubber system high pressure Heisui River
Solid particle, then flocculant is added through subsider and settles to obtain clear buck；
S3, wastewater treatment will be drained into outside the less buck a part of impurity content, another part is as circulation buck after deoxygenation
Scrubbing tower-gasified boiler system is sent by the pressurization of high pressure grey water pump to be recycled；
S4, the grey water inlet addition dispersing agent in circulating involuting system；
S5, (non-bonus point powder part) draws a part from buck, is introduced into a precipitation tank, causticity is added in precipitation tank
A kind of carry out chemical precipitation of sodium or soda ash, the impurity for reacting formation accumulate in precipitation tank bottom section after settlement；
S6, precipitation tank top clarified solution are stand-by into second collecting pit through overflow weir overflow；
S7, a water circulating pump by installation, draw the clarified solution in second collecting pit, and then clarified solution pressurizes and enters
Nanofiltration membrane carries out film filtering；
S8, the buck that reduced levels are down to by hardness after nanofiltration membrane are used instead of part fresh water as system water supplement.
Preferably, dispersing agent can prevent buck fouling in systems in the S4, improve buck water quality, improve buck product
Matter.
Preferably, the impurity that precipitation tank bottom section is accumulated in the S5 is led leaching by trench bottom and is discharged.
Preferably, nanofiltration membrane is used to retain the chemical dirt that particle in buck is smaller, does not settle in the S7.
Preferably, monitor closely nanofiltration membrane pressure difference is needed in the S8, when pressure difference height is to warning value, switches to spare nanofiltration
Then film backwashes former nanofiltration membrane, remove solid particle and cleaning nanofiltration membrane channels that nanofiltration membrane is sticked, reduce weight after pressure difference
It is new spare.
Preferably, the counter-flushing liquid uses part acid solution.
Buck adequately can be recycled and be utilized using technology by the coal gasification buck in the present invention, can be effectively
Industrial water amount is reduced, is more in line with the requirement of resource-conserving, while important function has also been played to the protection of ecological environment,
A large amount of water resource can not only be saved, reduces consumption, moreover it is possible to bring the benefit of huge economy, while downstream wastewater can be reduced
The pressure of processing equipment.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
In the present invention, the powdered coal pressuring gasified technology of space flight furnace mainly by coal-grinding and transportation system, gasification and synthesizes at present
Gas washing system, slag and grey water treatment system composition, wherein pulp water processing technique is the important composition portion of space flight furnace gasification technology
Point, two parts mainly are recycled including usage on black water and buck, so-called Heisui River is the water being discharged from gasification furnace, scrubbing tower, slag bath, ash
Water is the water that Heisui River is formed after double flash evaporation, flocculation, filtering, clarification, and most of buck is sent after deoxidation again to gasification unit
It is recycled, another part drains into Sewage Disposal outside as waste water and handled.
At present coal gasifying process in the process of running, it is found that gasification furnace shock chamber and the blocking of Heisui River pipeline scaling are serious,
The main reason is that the grey water hardness is higher, fouling tendency is big.The grey water hardness is up to 8mg/l, and basicity is up to 9 mg/l.To slow down
Water quality deterioration pressure, main at present using increasing outlet ash water and increasing the method for rate of water make-up, outlet buck is up to per hour
300 tons, however, this measure not only increases operating cost, but also the buck of a large amount of outlets is caused to downstream water treatment system
Immense pressure does not meet the requirement of construction energy conservation and environmental protection enterprise.Therefore, using effective water treatment technology, salinity is removed, improves ash
Water use efficiency, reduce outlet ash water be it is very urgent and necessary, it is domestic built and have more than 300 Novel airs what is built
Change furnace, ash water recycling is huge using the market demand.
For country's coal gasification ash water recycling using the grey water hardness is mainly reduced, the method taken mainly includes following several at present
Kind:
1, chemical precipitation method
Chemical precipitation method is exactly to add certain chemical agent into waste water calcium ions and magnesium ions is enable to precipitate, to reduce hardness,
To achieve the purpose that softening.The method for alloing it to generate calcium carbonate and carbonic acid magnesium precipitate by the way that chemical agent is added effectively removes
Calcium ions and magnesium ions.The chemical precipitation method being widely used at present mainly has careless property sodium tenderizer, lime softening method, lime soda ash joint soft
Change method.
2, ion-exchange
Currently, a large amount of NEW TYPE OF COMPOSITE ion-exchangers are widely used, they can be such that the calcium ions and magnesium ions in water obtain effectively
Removal, softens hard water, reaches the standard of discharge or reuse.Ion-exchange is mainly used for the advanced treating of water quality,
The high-purity water of complete desalination can be produced, and the resin after exchange can regenerate, Reusability.
3, Nanofiltering membrane
Nanofiltration is a kind of membrane separation technique between reverse osmosis technology and ultrafiltration, its aperture is generally several nanometers, can
Substance of the molecular cut off in range.Nanofiltration is shown in numerous areas such as biochemical industry, pharmacy, food industry
Its advantage, it is energy-efficient, it has broad application prospects, is widely used in the softening of water.It can not only effectively remove hardness, and
And can also go water removal in organic matter, solely degree and suspended matter, trip mud will not be generated.The technical treatment effect stability, land occupation face
Product is small, maintenance is simple, can be with automatic operation, and operating cost is low.
4, antisludging agent dispersion method is added
Quadrafos (mainly including sodium tripolyphosphate and calgon), organic phosphoric acid, phosphino- are added into the water of high rigidity
Polycarboxylic acids etc. makes itself and calcium and magnesium ion and other metal ions generation chelating or complexing in water, does not generate precipitating,
The generation for preventing pool, to achieve the purpose that softening.
The present invention carries out grey water process using chemical precipitation method+nanofiltration membrane+dirt dispersion agent three combination,
The grey water hardness can be reduced to 70% or so, grey water use efficiency can be improved by original 70% to 90%, this project can save
About a large amount of water resource reduces consumption, brings the benefit of huge economy, saves the calculating of 100 tons of water on an hourly basis, water per ton at
This 5 yuan, about 5,000,000 yuan can be saved year.
The available sufficient recycling of coal gasification buck and utilization in the present invention, significantly reduce industrial water amount,
So that enterprise is more in line with the requirement of resource-conserving, important function has been played to the protection of ecological environment, currently, domestic air flow bed
Coal gasifying process has become mainstream, and ash water recycling utilization will be the common issue that coal gasification industry faces, as country is to resource
With being gradually increased for environmental protection dynamics, each enterprise is increasingly urgent to energy-saving requirement, recovery and utilization technology of the invention
It will be fully used, market prospects are more wide.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. the graywater treating method in a kind of coal gasification scouring water recycling system, which comprises the following steps:
S1, in gasification furnace-scrubber system, synthesis gas washing generate the gasification Heisui River containing a large amount of coal ash solid particles；
S2, flash distillation workshop section removing major part is sent to after pressure reducing valve is depressured from gasification furnace-scrubber system high pressure Heisui River
Solid particle, then flocculant is added through subsider and settles to obtain clear buck；
S3, wastewater treatment will be drained into outside the less buck a part of impurity content, another part is as circulation buck after deoxygenation
Scrubbing tower-gasified boiler system is sent by the pressurization of high pressure grey water pump to be recycled；
S4, the grey water inlet addition dispersing agent in circulating involuting system；
S5, (non-bonus point powder part) draws a part from buck, is introduced into a precipitation tank, causticity is added in precipitation tank
A kind of carry out chemical precipitation of sodium or soda ash, the impurity for reacting formation accumulate in precipitation tank bottom section after settlement；
S6, precipitation tank top clarified solution are stand-by into second collecting pit through overflow weir overflow；
S7, a water circulating pump by installation, draw the clarified solution in second collecting pit, and then clarified solution pressurizes and enters
Nanofiltration membrane carries out film filtering；
S8, the buck that reduced levels are down to by hardness after nanofiltration membrane are used instead of part fresh water as system water supplement.
2. the graywater treating method in a kind of coal gasification scouring water recycling system according to claim 1, feature exist
In: dispersing agent can prevent buck fouling in systems in the S4, improve buck water quality, improve buck quality.
3. the graywater treating method in a kind of coal gasification scouring water recycling system according to claim 1, feature exist
In: the impurity that precipitation tank bottom section is accumulated in the S5 is led leaching by trench bottom and is discharged.
4. the graywater treating method in a kind of coal gasification scouring water recycling system according to claim 1, feature exist
In: nanofiltration membrane is for retaining the chemical dirt that particle in buck is smaller, does not settle in the S7.
5. the graywater treating method in a kind of coal gasification scouring water recycling system according to claim 1, feature exist
In: monitor closely nanofiltration membrane pressure difference is needed in the S8, when pressure difference height is to warning value, spare nanofiltration membrane is switched to, then to original
Solid particle and clear up nanofiltration membrane channels that nanofiltration membrane is sticked are removed in nanofiltration membrane backwash, again spare after reduction pressure difference.
6. the graywater treating method in a kind of coal gasification scouring water recycling system according to claim 5, feature exist
In: the counter-flushing liquid uses part acid solution.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777248A (en) * | 2020-06-28 | 2020-10-16 | 宁夏神耀科技有限责任公司 | Coal gasification water system on-line analysis and monitoring intelligent system based on cloud |
| CN111995114A (en) * | 2020-08-25 | 2020-11-27 | 北京翰祺环境技术有限公司 | Coal gasification black ash water treatment method and treatment system |
| CN112578078A (en) * | 2020-11-18 | 2021-03-30 | 北京星枫先控科技有限公司 | Water quality Ca for gasification device2+、Mg2+On-line monitoring method |
| CN114409141A (en) * | 2022-02-14 | 2022-04-29 | 中海油天津化工研究设计院有限公司 | Method for hardness removal of coal gasification ash water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150014142A1 (en) * | 2008-10-15 | 2015-01-15 | General Electric Company | Method for processing waste water using zero process water discharge |
| CN106673270A (en) * | 2015-12-07 | 2017-05-17 | 天津正达科技有限责任公司 | Coal gasification black/gray water system treatment method capable of lowering hardness, saving water and reducing sewage discharge |
| CN208327610U (en) * | 2018-04-10 | 2019-01-04 | 河南晋开化工投资控股集团有限责任公司 | Coal gasification ash water recycling reutilization system |
| CN109485190A (en) * | 2017-09-11 | 2019-03-19 | 神华集团有限责任公司 | The processing method and gasification of coal and its system in the Heisui River that coal gasification generates |
-
2019
- 2019-08-01 CN CN201910708640.0A patent/CN110282810A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150014142A1 (en) * | 2008-10-15 | 2015-01-15 | General Electric Company | Method for processing waste water using zero process water discharge |
| CN106673270A (en) * | 2015-12-07 | 2017-05-17 | 天津正达科技有限责任公司 | Coal gasification black/gray water system treatment method capable of lowering hardness, saving water and reducing sewage discharge |
| CN109485190A (en) * | 2017-09-11 | 2019-03-19 | 神华集团有限责任公司 | The processing method and gasification of coal and its system in the Heisui River that coal gasification generates |
| CN208327610U (en) * | 2018-04-10 | 2019-01-04 | 河南晋开化工投资控股集团有限责任公司 | Coal gasification ash water recycling reutilization system |
Non-Patent Citations (1)
| Title |
|---|
| 成莉燕: "《现代煤化工生产技术》", 31 December 2014 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777248A (en) * | 2020-06-28 | 2020-10-16 | 宁夏神耀科技有限责任公司 | Coal gasification water system on-line analysis and monitoring intelligent system based on cloud |
| CN111995114A (en) * | 2020-08-25 | 2020-11-27 | 北京翰祺环境技术有限公司 | Coal gasification black ash water treatment method and treatment system |
| CN111995114B (en) * | 2020-08-25 | 2024-03-22 | 北京翰祺环境技术有限公司 | Coal gasification black ash water treatment method and treatment system |
| CN112578078A (en) * | 2020-11-18 | 2021-03-30 | 北京星枫先控科技有限公司 | Water quality Ca for gasification device2+、Mg2+On-line monitoring method |
| CN114409141A (en) * | 2022-02-14 | 2022-04-29 | 中海油天津化工研究设计院有限公司 | Method for hardness removal of coal gasification ash water |
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