CN105712526A - Muddy water recycling technology for water purification station of thermal power plant - Google Patents
Muddy water recycling technology for water purification station of thermal power plant Download PDFInfo
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- CN105712526A CN105712526A CN201510282077.7A CN201510282077A CN105712526A CN 105712526 A CN105712526 A CN 105712526A CN 201510282077 A CN201510282077 A CN 201510282077A CN 105712526 A CN105712526 A CN 105712526A
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Abstract
The invention discloses a muddy water recycling technology for a water purification station of a thermal power plant. The muddy water recycling technology includes that raw water flows into a reaction sedimentation tank and is subjected to coagulation and precipitation to obtain liquid supernatant and bottom mud, the bottom mud is discharged into a mud discharge tank directly, part of the liquid supernatant is delivered to industrial water users, and residual liquid supernatant flows to a filter; filtrate obtained through filtration of the filter is delivered to a boiler feed-water treatment system, and back flush drain water is delivered to a drain tank; the back flush drain water flows back to the reaction sedimentation tank directly; the bottom mud in the mud discharge tank is discharged into a concentration tank for concentration so as to obtain liquid supernatant and sludge, the liquid supernatant flows back to the reaction sedimentation tank, and the sludge is discharged into an equalization tank directly; after being subjected to regulation by the equalization tank, the sludge is discharged into a dehydrator for dehydration so as to obtain mud cakes. The muddy water recycling technology for the water purification station of the thermal power plant has the advantages that the muddy water recycling technology is of small occupied area, small size, less investment, low cost, low water consumption and environment friendliness, and the back flush drain water of the filter is delivered into the reaction sedimentation tank directly without being sedimentated once more, is reused directly as pretreatment raw water and still meets raw water pretreatment technology requirements on water quality and water quantity.
Description
Technical field
The present invention relates to muddy water recovery processing technique, the technique that specifically a kind of thermal power plant water purification station muddy water is recycled.
Background technology
Coagulation, precipitation, filtration are the technological processes relatively popularized in treating nature water, in coagulation, precipitation, filter process, the substantial amounts of muddy water including reaction settling basin spoil disposal and filter back washing draining can be produced, how reclaiming fully, reasonably process and recycle this part water yield, the water affairs management for power plant has considerable meaning.
Coagulation, precipitation, filtration are the key steps realizing former water solid-liquid separation: coagulation, precipitation are to instigate fine suspension or colloidal particles in water to adsorb mutually to be combined into larger particles, and make polymer substance in water mutually cohere and then utilize, by adsorption bridging effect, the process that gravitational settling separates from water；Filtering is then on the basis of precipitation, makes current pass through bulk material or porous media (i.e. filtrate), to remove the process of float in water further.Such as former water suspension content is about 120mg/L, and suspension content can be removed to about 5mg/L by reaction settling basin by coagulating sedimentation effect, and the suspension content of its spoil disposal is at more than 1000mg/L；Suspension content can be removed further to about 1mg/L by filter tank by filtration, and the suspension content of its backwash draining is at about 150mg/L.
For thermal power plant, after often this part muddy water being collected by precipitating again, concentrate, the step such as dehydration is separated into clear liquid and mud cake, clear liquid is delivered to water inlet place of former water and is carried out reuse.As illustrated in fig. 1 and 2, the technique that common muddy water is recycled mainly has following two:
One, former water flows into reaction settling basin, obtains supernatant and bed mud after coagulation, precipitation, and bed mud is immediately discharged to spoil disposal pond, and part supernatant delivers to industry water user for it, and residue supernatant flow to filter tank and is filtered；The filtrate obtained through filter delivers to Boiler water Feeding System system directly as boiler feedwater, and blowoff basin is delivered in the backwash draining in filter tank, this blowoff basin band sedimentation tank；After the precipitation of blowoff basin, supernatant is back to reaction settling basin, and bed mud then drains into spoil disposal pond；Bed mud in spoil disposal pond enters concentration basin carry out concentration and obtain supernatant and mud, supernatant is back to reaction settling basin, mud is then directly discharged into counterbalance cell, after the adjustment of counterbalance cell, mud enters dewaterer carry out dehydration and obtain separating medium and mud cake, separating medium is back to spoil disposal pond and carries out secondary concentration, and mud cake is transported outward；
Two, former water flows into reaction settling basin, obtains supernatant and bed mud after coagulation, precipitation, and bed mud is immediately discharged to comprehensive spoil disposal pond, and part supernatant delivers to industry water user for it, and residue supernatant flow to filter tank and is filtered；The filtrate obtained through filter delivers to Boiler water Feeding System system directly as boiler feedwater, and comprehensive spoil disposal pond is delivered in the backwash draining in filter tank；Bed mud in comprehensive spoil disposal pond, backwash draining enter concentration basin together carry out concentration and obtain supernatant and mud, supernatant is back to reaction settling basin, mud is then directly discharged into counterbalance cell, after the adjustment of counterbalance cell, mud enters dewaterer carry out dehydration and obtain separating medium and mud cake, separating medium is back to spoil disposal pond and carries out secondary concentration, and mud cake is transported outward.
Can be seen that from the technological process of above two Slurry treatment reuse, filter back washing draining is carried out precipitate and separate or a series of subsequent treatment such as homogenizing, concentration by existing Slurry treatment reuse technology, required treatment facility is larger, one-time investment is big, operating cost is high, and water consumption is big, the waste water not meeting current social promotion designs reuse requirement step by step.
Summary of the invention
It is an object of the invention to provide a kind of take up an area less, small scale, small investment, expense are low, water consumption is low, the thermal power plant water purification station muddy water of environmental protection is recycled technique.
For achieving the above object, the present invention provides following technical scheme:
The technique that a kind of thermal power plant water purification station muddy water is recycled, comprises the following steps:
(1) former water flows into reaction settling basin, obtains supernatant and bed mud after coagulation, precipitation, and bed mud is immediately discharged to spoil disposal pond, and part supernatant delivers to industry water user for it, and residue supernatant flow to filter tank；
(2) filtrate obtained through filter delivers to Boiler water Feeding System system directly as boiler feedwater, and blowoff basin is delivered in the backwash draining in filter tank；
(3) by the runoff investigation of blowoff basin, the backwash draining in blowoff basin is directly back to reaction settling basin；
(4) bed mud in spoil disposal pond entering concentration basin carry out concentration and obtain supernatant and mud, supernatant is back to reaction settling basin, and mud is then directly discharged into counterbalance cell；
(5) after the adjustment of counterbalance cell, mud is entered dewaterer and carries out dehydration and obtain mud cake.
As the further scheme of the present invention: in described step (2), blowoff basin is runoff investigation pond.
Compared with prior art, the invention has the beneficial effects as follows:
Filter back washing draining is mainly introduced directly into reaction settling basin without precipitation again by the present invention, and as the former water direct reuse of pretreatment, its water quality and quantity still meets treating nature water technological requirement.Therefore, the invention have the characteristics that:
1, The present invention reduces blowoff basin or the occupation of land in comprehensive spoil disposal pond.Common muddy water is recycled in technique, and filter back washing draining need to enter and carry out again precipitate and separate or enter in blowoff basin and carry out modified in comprehensive spoil disposal pond, all can increase floor space and the volume of corresponding spoil disposal structures.Filter back washing draining is entered reaction settling basin directly as a part of former water by the present invention, not only decreases blowoff basin or the occupation of land in comprehensive spoil disposal pond, also reduces the scale of the treatment facility at different levels such as subsequent concentration, dehydration, decrease one-time investment；
2, reaction settling basin spoil disposal is only concentrated by the present invention, eliminates the filter back washing draining diluting effect to reaction settling basin spoil disposal, thus alleviating the burden of the facilities such as follow-up sludge condensation, dehydration, makes concentrated effect better, and operating cost is lower；
3, the satisfied waste water advocated now of the present invention designs the requirement of reuse step by step, decreases water consumption, has good environmental benefit.
Accompanying drawing explanation
The muddy water that Fig. 1 is common recycles flow chart one；
The muddy water that Fig. 2 is common recycles flowchart 2；
Fig. 3 is the process chart of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention and accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Feature according to thermal power plant's water purification station filter back washing draining: 1. suspension content is at about 150mg/L is suitable with former water suspension content；2. in thermal power plant, only influent quality is required higher by Boiler water Feeding System system, need to be filtered processing, its proportion accounted in thermoelectricity total water consumption is less, reaction settling basin effluent quality can meet the requirement of other industry waters user, thus the backwash displacement of filtration system to compare former water consumption little a lot.So, it is possible to it can be used as a part of reaction settling basin inflow, its water quality still meets treating nature water technological requirement.
Refer to Fig. 3, in the embodiment of the present invention, the technique that a kind of thermal power plant water purification station muddy water is recycled, comprise the following steps:
(1) former water flows into reaction settling basin, obtains supernatant and bed mud after coagulation, precipitation, and bed mud is immediately discharged to spoil disposal pond, and part supernatant delivers to industry water user for it, and residue supernatant flow to filter tank and is filtered；
(2) filtrate obtained through filter delivers to Boiler water Feeding System system directly as boiler feedwater, and blowoff basin is delivered in the backwash draining in filter tank, and this blowoff basin is only runoff investigation pond, without sedimentation tank；
(3) by the runoff investigation of blowoff basin, the backwash draining in blowoff basin is directly back to reaction settling basin；
(4) bed mud in spoil disposal pond entering concentration basin carry out concentration and obtain supernatant and mud, supernatant is back to reaction settling basin, and mud is then directly discharged into counterbalance cell；
(5) after the adjustment of counterbalance cell, mud entering dewaterer and carries out dehydration and obtain mud cake, mud cake is transported outward.
Filter back washing draining is mainly introduced directly into reaction settling basin without precipitation again by the present invention, and as the former water direct reuse of pretreatment, its water quality and quantity still meets treating nature water technological requirement.
The invention have the characteristics that:
1, The present invention reduces blowoff basin or the occupation of land in comprehensive spoil disposal pond.Common muddy water is recycled in technique, and filter back washing draining need to enter and carry out again precipitate and separate or enter in blowoff basin and carry out modified in comprehensive spoil disposal pond, all can increase floor space and the volume of corresponding spoil disposal structures.Filter back washing draining is entered reaction settling basin directly as a part of former water by the present invention, not only decreases blowoff basin or the occupation of land in comprehensive spoil disposal pond, also reduces the scale of the treatment facility at different levels such as subsequent concentration, dehydration, decrease one-time investment；
2, reaction settling basin spoil disposal is only concentrated by the present invention, eliminates the filter back washing draining diluting effect to reaction settling basin spoil disposal, thus alleviating the burden of the facilities such as follow-up sludge condensation, dehydration, makes concentrated effect better, and operating cost is lower；
3, the satisfied waste water advocated now of the present invention designs the requirement of reuse step by step, decreases water consumption, has good environmental benefit.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the invention rather than described above limits, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in the present invention.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
Claims (2)
1. the technique that thermal power plant's water purification station muddy water is recycled, it is characterised in that comprise the following steps:
(1) former water flows into reaction settling basin, obtains supernatant and bed mud after coagulation, precipitation, and bed mud is immediately discharged to spoil disposal pond, and part supernatant delivers to industry water user for it, and residue supernatant flow to filter tank；
(2) filtrate obtained through filter delivers to Boiler water Feeding System system directly as boiler feedwater, and blowoff basin is delivered in the backwash draining in filter tank；
(3) by the runoff investigation of blowoff basin, the backwash draining in blowoff basin is directly back to reaction settling basin；
(4) bed mud in spoil disposal pond entering concentration basin carry out concentration and obtain supernatant and mud, supernatant is back to reaction settling basin, and mud is then directly discharged into counterbalance cell；
(5) after the adjustment of counterbalance cell, mud is entered dewaterer and carries out dehydration and obtain mud cake.
2. the technique that thermal power plant according to claim 1 water purification station muddy water is recycled, it is characterised in that in described step (2), blowoff basin is runoff investigation pond.
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| CN201510282077.7A CN105712526A (en) | 2015-05-28 | 2015-05-28 | Muddy water recycling technology for water purification station of thermal power plant |
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| CN201510282077.7A CN105712526A (en) | 2015-05-28 | 2015-05-28 | Muddy water recycling technology for water purification station of thermal power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894116A (en) * | 2019-11-29 | 2020-03-20 | 浙江德安科技股份有限公司 | Zero-emission treatment system for circulating cooling water |
| CN111573808A (en) * | 2020-06-03 | 2020-08-25 | 铜陵有色金属集团股份有限公司 | Sludge water treatment process for water supply treatment purification station |
| CN116161718A (en) * | 2022-12-27 | 2023-05-26 | 中国电力工程顾问集团华东电力设计院有限公司 | Large-scale thermal power plant wastewater zero release dynamic management system |
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| WO2012105847A1 (en) * | 2011-02-04 | 2012-08-09 | Salsnes Filter As | System and method for the treatment of municipal and industrial wastewater and sludge |
| CN103787541A (en) * | 2014-01-24 | 2014-05-14 | 王辛平 | Method and device for recycling wet desulfurization wastewater in thermal power plant |
| CN204058089U (en) * | 2014-07-30 | 2014-12-31 | 上海市政工程设计研究总院（集团）有限公司 | Seasonal high turbid original sub-block device |
| CN104418481A (en) * | 2013-09-03 | 2015-03-18 | 上海市政工程设计研究总院（集团）有限公司 | Mass-energy transformation treatment process for production wastewater |
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2015
- 2015-05-28 CN CN201510282077.7A patent/CN105712526A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012105847A1 (en) * | 2011-02-04 | 2012-08-09 | Salsnes Filter As | System and method for the treatment of municipal and industrial wastewater and sludge |
| CN104418481A (en) * | 2013-09-03 | 2015-03-18 | 上海市政工程设计研究总院（集团）有限公司 | Mass-energy transformation treatment process for production wastewater |
| CN103787541A (en) * | 2014-01-24 | 2014-05-14 | 王辛平 | Method and device for recycling wet desulfurization wastewater in thermal power plant |
| CN204058089U (en) * | 2014-07-30 | 2014-12-31 | 上海市政工程设计研究总院（集团）有限公司 | Seasonal high turbid original sub-block device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894116A (en) * | 2019-11-29 | 2020-03-20 | 浙江德安科技股份有限公司 | Zero-emission treatment system for circulating cooling water |
| CN111573808A (en) * | 2020-06-03 | 2020-08-25 | 铜陵有色金属集团股份有限公司 | Sludge water treatment process for water supply treatment purification station |
| CN116161718A (en) * | 2022-12-27 | 2023-05-26 | 中国电力工程顾问集团华东电力设计院有限公司 | Large-scale thermal power plant wastewater zero release dynamic management system |
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Application publication date: 20160629 |
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