CN104909492A - Method for improving power plant raw water utilization rate - Google Patents
Method for improving power plant raw water utilization rate Download PDFInfo
- Publication number
- CN104909492A CN104909492A CN201510269616.3A CN201510269616A CN104909492A CN 104909492 A CN104909492 A CN 104909492A CN 201510269616 A CN201510269616 A CN 201510269616A CN 104909492 A CN104909492 A CN 104909492A
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- Prior art keywords
- water
- clear water
- reverse osmosis
- power plant
- filter
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a method for improving power plant raw water utilization rate. The method includes the following steps in order: 1. conducting rough filtration on raw water by a two-media filter; 2. performing fine filtration on the clear water filtered by step 1 by an ultrafiltration device; 3. adjusting the PH value and temperature of the finely filtered clear water in step 2, and adding a reverse osmosis scale inhibitor; 4. carrying out pre-desalination treatment on the clear water generated in step 3 by a reverse osmosis device; and 5. letting the fresh water generated by step 4 enter ion exchange equipment to conduct desalination so as to obtain desalted water. Under the premise of guaranteeing boiler water quality, the method provided by the invention substantially reduces the raw water consumption, greatly decreases wastewater discharge, and also significantly lowers the water making cost.
Description
Technical field
The invention belongs to the original sub-block technical field of thermal power generating technology, be specifically related to a kind of method improving the former water use efficiency of power plant.
Background technology
In thermal power generating technology field, containing a large amount of impurity such as colloidal suspended substance, salt in former water, can not directly use; Former water enter chemical water treatment system process after pure water boiler of feeding use; In the prior art, former water carries out chemical pro desalting and carries out ion-exchange demineralization again after treating nature water, reaches water purification object to meet boiler feed water requirement, can produce a large amount of chemical wastewaters in Water Treatment process.According to data statistics, chemical system waste water rate is up to 57%, and former Water Sproading utilization ratio is only 43%; Cause larger water resource waste.
Summary of the invention
The object of this invention is to provide a kind of method improving the former water use efficiency of power plant, solve the problem that in current thermal power generation original sub-block, effluent quality is poor, water resource waste is serious, processing cost is large.
Technical scheme of the present invention is:
Improve a method for the former water use efficiency of power plant, comprise the following steps successively:
Step 1: former water carries out coarse filtration by two medium filter;
Step 2: the clear water after filtering in step 1 is carried out essence filter by ultra-filtration equipment;
Step 3: in set-up procedure 2, essence filters pH value and the temperature of rear clear water, adds reverse osmosis antisludging agent simultaneously;
Step 4: clear water step 3 produced carries out pro desalting process by reverse osmosis unit;
Step 5: the fresh water that step 4 produces enters ion-exchange unit and carries out desalination to produce de-mineralized water.
In described step 3, after the filter of adjustment essence, the method for clear water pH value is for adding hydrochloric acid, and the clear water pH value scope of adjustment is 6.0-6.5.
In described step 3, after the filter of adjustment essence, the method for clear water temperature is for using the heating of generating set exhaust steam residual heat, and the clear water temperature range of adjustment is 25 DEG C ~ 30 DEG C.
In described step 4, take chemical on-line cleaning to recover the water-yielding capacity of reverse osmosis unit membrane module to reverse osmosis unit membrane module simultaneously.
Beneficial effect of the present invention:
First the present invention adopts two medium filter according to water quality requirement, ultrafiltration system filters former water, then the water temperature of clear water and pH value is adjusted through reverse osmosis unit, eventually passing ion-exchange unit carries out except Ficus caricaL, under the prerequisite that ensure that boiler feed water water quality, make that former water consumption significantly declines, chemical wastewater discharge significantly reduces, water producing cost also declines greatly.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed:
Improve a method for the former water use efficiency of power plant, comprise the following steps successively:
Step 1: former water carries out coarse filtration by two medium filter;
Step 2: the clear water after coarse filtration in step 1 is carried out essence filter by ultra-filtration equipment;
Step 3: the clear water pH value in set-up procedure 2 after essence filter and temperature, adds hydrochloric acid adjustment clear water pH value to 6.0-6.5, adds reverse osmosis antisludging agent simultaneously; By clear water heating temperatures to 25 DEG C ~ 30 DEG C; Add the heating of thermal utilization generating set exhaust steam residual heat, specifically, utilize board-like heat exchanger to carry out heat exchange as the clear water after thermal source, essence filter as low-temperature receiver heat network system pipe network hot water and water temperature be adjusted to 25 DEG C ~ 30 DEG C;
Step 4: the clear water that step 3 produces carries out pro desalting process by reverse osmosis unit, at the temperature and pH value of upper step, reverse osmosis unit intake pressure reduces, film water rate increases, and the rate of recovery rises to 76%, improves the safety and economic operation reliability of pro desalting system device in winter simultaneously; Reverse osmosis unit membrane module is as the filtering element of deep layer, and its surface is inevitably returned residual colloid, microorganism, impurity particle and the precipitation of indissoluble salt on its surface; So take chemical cleaning technology in time to the reverse osmosis unit membrane module that influenced, water production rate obviously reduce, the measures such as the control of cleaning parameters are recovered to the water-yielding capacity of reverse osmosis unit membrane module;
Step 5: the fresh water that step 4 produces enters ion-exchange unit and carries out desalination to produce de-mineralized water.
By aforesaid method, the water quality mark not only after purification all meets all technical requirement of subsequent handling, and water producing cost also declines greatly, economize expense and reduce expend benefit is given prominence to, and reduce former water consumption, discharge of wastewater greatly reduces, and environmental benefit is obvious.
Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading specification sheets of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.
Claims (4)
1. improve a method for the former water use efficiency of power plant, it is characterized in that: comprise the following steps successively:
Step 1: former water carries out coarse filtration by two medium filter;
Step 2: the clear water after filtering in step 1 is carried out essence filter by ultra-filtration equipment;
Step 3: in set-up procedure 2, essence filters pH value and the temperature of rear clear water, adds reverse osmosis antisludging agent simultaneously;
Step 4: clear water step 3 produced carries out pro desalting process by reverse osmosis unit;
Step 5: the fresh water that step 4 produces enters ion-exchange unit and carries out desalination to produce de-mineralized water.
2. the method for the former water use efficiency of raising power plant according to claim 1, is characterized in that:
In described step 3, after the filter of adjustment essence, the method for clear water pH value is for adding hydrochloric acid, and the clear water pH value scope of adjustment is 6.0-6.5.
3. the method for the former water use efficiency of raising power plant according to claim 1 and 2, is characterized in that: in described step 3, after the filter of adjustment essence, the method for clear water temperature heats for utilizing generating set exhaust steam residual heat, and adjustment temperature range is 25 DEG C ~ 30 DEG C.
4. the method for the former water use efficiency of raising power plant according to claim 3, is characterized in that: in described step 4, take chemical on-line cleaning to recover the water-yielding capacity of reverse osmosis unit membrane module to reverse osmosis unit membrane module simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269616.3A CN104909492A (en) | 2015-05-25 | 2015-05-25 | Method for improving power plant raw water utilization rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269616.3A CN104909492A (en) | 2015-05-25 | 2015-05-25 | Method for improving power plant raw water utilization rate |
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| CN104909492A true CN104909492A (en) | 2015-09-16 |
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| CN201510269616.3A Pending CN104909492A (en) | 2015-05-25 | 2015-05-25 | Method for improving power plant raw water utilization rate |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039599A (en) * | 2007-08-06 | 2009-02-26 | Kurita Water Ind Ltd | Water treatment system |
| CN201746400U (en) * | 2010-07-14 | 2011-02-16 | 武汉都市环保工程技术股份有限公司 | Depth treatment system for reclaimed water recycling |
| CN102107958A (en) * | 2009-12-25 | 2011-06-29 | 上海亚同环保实业股份有限公司 | Method for performing advanced treatment and reuse on oil-refining sewage and matched device |
| CN102344215A (en) * | 2010-12-10 | 2012-02-08 | 新疆德蓝股份有限公司 | Novel water treatment method for boiler feedwater |
| CN202156962U (en) * | 2011-07-04 | 2012-03-07 | 吉林市世纪华扬环境工程有限公司 | Demineralized water treating device for refining petroleum |
| CN103253793A (en) * | 2013-05-31 | 2013-08-21 | 徐臻毅 | High-pressure boiler feedwater treatment system |
| CN103739114A (en) * | 2013-12-27 | 2014-04-23 | 陕西大唐新能电力设计有限公司 | Boiler water treatment system |
-
2015
- 2015-05-25 CN CN201510269616.3A patent/CN104909492A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039599A (en) * | 2007-08-06 | 2009-02-26 | Kurita Water Ind Ltd | Water treatment system |
| CN102107958A (en) * | 2009-12-25 | 2011-06-29 | 上海亚同环保实业股份有限公司 | Method for performing advanced treatment and reuse on oil-refining sewage and matched device |
| CN201746400U (en) * | 2010-07-14 | 2011-02-16 | 武汉都市环保工程技术股份有限公司 | Depth treatment system for reclaimed water recycling |
| CN102344215A (en) * | 2010-12-10 | 2012-02-08 | 新疆德蓝股份有限公司 | Novel water treatment method for boiler feedwater |
| CN202156962U (en) * | 2011-07-04 | 2012-03-07 | 吉林市世纪华扬环境工程有限公司 | Demineralized water treating device for refining petroleum |
| CN103253793A (en) * | 2013-05-31 | 2013-08-21 | 徐臻毅 | High-pressure boiler feedwater treatment system |
| CN103739114A (en) * | 2013-12-27 | 2014-04-23 | 陕西大唐新能电力设计有限公司 | Boiler water treatment system |
Non-Patent Citations (1)
| Title |
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| 曾杭成，等: "锅炉补给水处理系统工艺设计及运行", <<工业水处理>> * |
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Application publication date: 20150916 |