CN102190379B - Method for softening ash water by using distilled ammonia wastewater - Google Patents
Method for softening ash water by using distilled ammonia wastewater Download PDFInfo
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- CN102190379B CN102190379B CN 201010129571 CN201010129571A CN102190379B CN 102190379 B CN102190379 B CN 102190379B CN 201010129571 CN201010129571 CN 201010129571 CN 201010129571 A CN201010129571 A CN 201010129571A CN 102190379 B CN102190379 B CN 102190379B
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- distilled ammonia
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Abstract
The invention discloses a method for softening gray water by using distilled ammonia wastewater, which comprises the following steps of: fully mixing the distilled ammonia wastewater and the ash water; and performing precipitation and clarification treatment on the mixed solution to ensure that the hardness of the obtained clarified liquor is 150-400mg/l, wherein the volume ratio of the distilled ammonia wastewater to the ash water is 1:25-1:10. In the method, the distilled ammonia wastewater of a stripping tower is reacted with the ash water discharged by a gasification device, so that the hardness in the ash water is reduced and the ash water returns to a system for further utilization. In the method, a principle that waste treats waste is utilized, the waste liquor generated by the system is used as an agent for treating the wastewater, the wastewater emission can be reduced, and the method has the advantages of low production cost and environmental friendliness.
Description
Technical field
The present invention relates to a kind of softening method of buck, especially relate to a kind of method of utilizing the softening buck of distilled ammonia wastewater, belong to the grey water handing field in the coal chemical engineering equipment.
Background technology
For Coal Gasification Technology,, must guarantee water conditioning in the system in order to ensure system's ability long-period stable operation.In order to ensure water conditioning, effective means is to keep certain outer water displacement, yet, keep outer water displacement, increased the enterprise wastewater quantity discharged, can not meet the requirement of energy-saving and emission-reduction, be unfavorable for environment protection.Therefore, the buck in the treatment unit makes it meet retrieval system and utilizes standard, for coal chemical industry enterprises, has great importance.
At present, the graywater treating method of coal chemical industry enterprises device generally, adopts the buck extraction system is carried out biochemical treatment, effluxes as waste water after reaching emission request.Yet aforesaid method is not only realized difficulty, and processing cost is high.
The graywater treating method that our company adopts is; With the low pressure buck with send into equalizing tank after sewage mixes; After biological denitrificaion was handled, gathered the iron flocculence and removes COD and handle, supernatant got into the sewage water discharge house steward, and the mud of generation carries out respectively that mud concentrates, burning disposal behind the mechanical dehydration.Also there are problems such as complex technical process, processing cost be higher in this method.
Summary of the invention
The method that the purpose of this invention is to provide the buck in a kind of method processing coal chemical engineering equipment simple, with low cost makes the buck after the processing can the retrieval system recycle.
The present invention adopts following technical scheme to solve above-mentioned technical problem:
A kind of method of utilizing the softening buck of distilled ammonia wastewater comprises step, makes distilled ammonia wastewater and buck thorough mixing, then mixed solution is precipitated clarifying treatment, and the hardness that makes the gained clear liquor is 150～400mg/l; The volume ratio of said distilled ammonia wastewater and buck is 1: 25～1: 10.
Said buck is the buck of discharging in the gasification installation of Coal Chemical Industry, and its hardness is 800～1500mg/l.
The waste water that said distilled ammonia wastewater is discharged from aminoacid stripping tower, its pH value are 8.0～9.5, NH
3-N (in N) is 3900～4500mg/l, HCO
- 3+ CO
3 2-Be 0.2～0.3mol/l.
NH in the said clear liquor
3-N (in N) is 300～650mg/l.
Said deposition clarifying treatment method adopts the ordinary method in this area.
The present invention utilizes distilled ammonia wastewater and buck to react, and not only can reduce the hardness of buck, also can reduce the ammonia-nitrogen content in the distilled ammonia wastewater.The distilled ammonia wastewater that in buck, adds is many more, and the hardness of gained clear liquor is also just low more, and still along with the increase of distilled ammonia wastewater add-on, the ammonia-nitrogen content in the gained clear liquor also can increase.In addition; Owing to also contain multiple toxic substances such as phenol, cyanogen, sulfide, tar and COD in the distilled ammonia wastewater; So the volume ratio of control distilled ammonia wastewater and buck is 1: 25～1: 10 among the present invention; Hardness, ammonia-nitrogen content, pH value and the various content of harmful of the buck after softening are controlled in the reasonable range, so that it meets the standard that retrieval system is utilized again.
Preferably, the volume ratio of said distilled ammonia wastewater and buck is 1: 20～1: 15, and the hardness of said clear liquor is 300～400mg/l, NH in the said clear liquor
3-N (in N) is 300～400mg/l.
The clear liquor of said buck gained after method of the present invention is softening can the retrieval system recycle, also can replace de-mineralized water used on the device.
Among the present invention, said hardness is total hardness.
The buck that the present invention utilizes stripping tower distilled ammonia wastewater and gasification installation to efflux reacts, and the hardness reduction back retrieval system in the buck is further utilized.This method is utilized the principle of the treatment of wastes with processes of wastes against one another, and the waste liquid that system is produced can reduce the outer discharge capacity of waste water as the medicament of handling waste water, has low, the eco-friendly advantage of production cost.
Compared with prior art, the invention has the beneficial effects as follows:
1) press the gasification installation of coal feeding amount 1500t/d, can reduce the outer discharge capacity of 25t/h buck, and the grey water circulation use after will softening, according to 2 yuan/ton of wastewater treatment expenses, year working time, 8000h calculated, and can reduce expenses about 400,000 yuan every year;
2) buck after softening has substituted the de-mineralized water that existing apparatus adopts, and the consumption of former de-mineralized water is 25t/h, and cost is 8 yuan of tons, and year working time, 8000h calculated, and can reduce expenses every year is 1,600,000 yuan.
Embodiment
Below in conjunction with embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
Get distilled ammonia wastewater from ammonia still process stripping tower separating tank and be used for softening grey water test, the pH value of surveying distilled ammonia wastewater is 8.83, NH
3-N (in N) is about 4200mg/l, HCO
3-+ CO
3 2-Be about 0.26mol/l.Get buck from gasification installation, recording hardness is 1046mg/l.
At normal temperatures, by different proportionings distilled ammonia wastewater is added in the buck, behind the high degree of agitation 30min, leave standstill 30min, get supernatant liquid and survey hardness, pH value and ammonia-nitrogen content, wherein go out the water hardness and carry out twice test, test-results is as shown in table 1:
The softening situation of buck and distilled ammonia wastewater different ratios under table 1 normal temperature
Analytically the watch test result can draw, and can the hardness in the water outlet be dropped to below the 150mg/l greater than 1/8 o'clock in the ratio of distilled ammonia wastewater and buck; The ratio of distilled ammonia wastewater and buck can be reduced to hardness about 300mg/l between 1/20～1/15 the time, can make the NH that mixes in the water of back again
3-N decreases.The ratio of distilled ammonia wastewater and buck was mixed the NH in the water of back less than 1/25 o'clock
3-N increases to some extent, and hardness also rises gradually.
Claims (5)
1. a method of utilizing the softening buck of distilled ammonia wastewater comprises the steps, makes distilled ammonia wastewater and buck thorough mixing, then mixed solution is precipitated clarifying treatment, and the hardness that makes the gained clear liquor is 150～400mg/l; The volume ratio of said distilled ammonia wastewater and buck is 1: 25～1: 10; Said buck is the buck of discharging in the gasification installation of Coal Chemical Industry.
2. the method for utilizing the softening buck of distilled ammonia wastewater as claimed in claim 1 is characterized in that the hardness of said buck is 800～1500mg/l.
3. the method for utilizing the softening buck of distilled ammonia wastewater as claimed in claim 1 is characterized in that, the pH value of said distilled ammonia wastewater is 8.0～9.5, in N NH
3-N is 3900～4500mg/l, HCO
- 3+ CO
3 2-Be 0.2～0.3mol/l.
4. the method for utilizing the softening buck of distilled ammonia wastewater as claimed in claim 1 is characterized in that the volume ratio of said distilled ammonia wastewater and buck is 1: 20～1: 15.
5. the method for utilizing the softening buck of distilled ammonia wastewater as claimed in claim 1 is characterized in that said clear liquor returns said gasification installation recycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010129571 CN102190379B (en) | 2010-03-19 | 2010-03-19 | Method for softening ash water by using distilled ammonia wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010129571 CN102190379B (en) | 2010-03-19 | 2010-03-19 | Method for softening ash water by using distilled ammonia wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102190379A CN102190379A (en) | 2011-09-21 |
| CN102190379B true CN102190379B (en) | 2012-09-26 |
Family
ID=44599374
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|---|---|---|---|
| CN 201010129571 Active CN102190379B (en) | 2010-03-19 | 2010-03-19 | Method for softening ash water by using distilled ammonia wastewater |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302522A2 (en) * | 1987-08-07 | 1989-02-08 | Nalco Chemical Company | Method and additive for monitoring circuit water hardness in conversion plants |
| CN1526662A (en) * | 2003-03-04 | 2004-09-08 | 上海焦化有限公司 | Softening and coagulating treatment process of gas scrubbing water |
| CN1948188A (en) * | 2006-10-27 | 2007-04-18 | 中国科学院成都有机化学有限公司 | Coking waste water zero discharge treatment process |
| CN101327936A (en) * | 2008-07-04 | 2008-12-24 | 石家庄新世纪煤化实业集团有限公司 | Ammonia gas reclaiming double tower distil process |
| WO2009089613A1 (en) * | 2008-01-15 | 2009-07-23 | Vale Inco Limited | Liquid and solid effluent treatment process |
-
2010
- 2010-03-19 CN CN 201010129571 patent/CN102190379B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302522A2 (en) * | 1987-08-07 | 1989-02-08 | Nalco Chemical Company | Method and additive for monitoring circuit water hardness in conversion plants |
| CN1526662A (en) * | 2003-03-04 | 2004-09-08 | 上海焦化有限公司 | Softening and coagulating treatment process of gas scrubbing water |
| CN1948188A (en) * | 2006-10-27 | 2007-04-18 | 中国科学院成都有机化学有限公司 | Coking waste water zero discharge treatment process |
| WO2009089613A1 (en) * | 2008-01-15 | 2009-07-23 | Vale Inco Limited | Liquid and solid effluent treatment process |
| CN101327936A (en) * | 2008-07-04 | 2008-12-24 | 石家庄新世纪煤化实业集团有限公司 | Ammonia gas reclaiming double tower distil process |
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| Publication number | Publication date |
|---|---|
| CN102190379A (en) | 2011-09-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI HUAYI ENERGY + CHEMICAL INDUSTRY CO., LTD Free format text: FORMER NAME: SHANGHAI COKING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200241 Minhang District, Wu Long Road, No. 4280, Shanghai Patentee after: Shanghai Hua Yi derived energy chemical Co., Ltd Address before: 200241 Minhang District, Wu Long Road, No. 4280, Shanghai Patentee before: Shanghai Coking Co., Ltd. |