CN205032283U - Wet -type electrostatic precipitator " two return circuit " water circulating system - Google Patents
Wet -type electrostatic precipitator " two return circuit " water circulating system Download PDFInfo
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- CN205032283U CN205032283U CN201520615661.5U CN201520615661U CN205032283U CN 205032283 U CN205032283 U CN 205032283U CN 201520615661 U CN201520615661 U CN 201520615661U CN 205032283 U CN205032283 U CN 205032283U
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Abstract
The utility model relates to a novel water circulating system, concretely relates to wet -type electrostatic precipitator " two return circuit " water circulating system, water circulating system be equipped with 2 circulation circuit, the branch maybe return circuit no. 1: wet -type electrostatic precipitator body -> circulation tank -> circulating water pump -> self -cleaning filter -> wet -type electrostatic precipitator body, return circuit no. 2: wet -type electrostatic precipitator body -> thick water tank -> drain pump -> integration water treatment facilities -> retrieval and utilization pump -> moisturizing case -> moisturizing pump -> wet -type electrostatic precipitator body. Compared with the prior art the advantage that has: 1 )No wastewater discharge can be adjusted according to device operation needs are nimble to the WESP water consumption. 2 )Integration water treatment facilities, water after processing part retrieval and utilization reduces the quantity of makeup water, using water wisely. Simultaneously, it meets the demands no wastewater discharge to arrange the water yield, the quality of water of giving WFGD ( wet flue gas desulfurization system).
Description
Technical field
The utility model relates to a kind of new type water circulatory system, is specifically related to a kind of wet electrical dust precipitator " double loop " water circulation system, is applied to thermal power plant wet-esp apparatus.
Background technology
According to the effect that water plays in wet electrical dust precipitator (hereinafter referred to as " WESP "), will be two classes with moisture: moisture film water, periodic flushing water.Moisture film water, be allow on dust collecting pole plate form the uniform water film flowed downward continuously, the water yield is generally larger, and for 600MW unit, the WESP of its correspondence needs water to reach 100m
3/ h, adopts the mode recycled to supply water more.WESP polar curve periodic flushing, the general < 10m of the water yield
3/ d, smaller.
At present, the flow process of conventional moisture film water is: power plant process pond (case) → small pump → WESP → cyclic water tank → circulating pump → filter → WESP.Equipment in running, moisturizing while from the water (replacing water) of filter bottom discharge equivalent to maintain water system turbidity, salinity stablizes, the water of discharge is as the supplementing water of wet desulfurization system (hereinafter referred to as " WFGD ").In cyclic water tank, also add appropriate alkali in running regulate water system pH.The draining of WESP periodic flushing enters WFGD or industrial wastewater treatment system.
The shortcoming of existing product is as follows: WESP replaces displacement must not more than the rate of water make-up of WFGD, otherwise unnecessary water must discharge, both contaminated environment also waste water resources.
WESP does not arrange water processing establishment of giving a dinner of welcome, replaced water, can not flexible modulation again by the restriction of WFGD, and give a dinner of welcome aqueous suspension and metal ion content can be higher, easy plug nozzle, acceleration dust collecting pole plate burn into reduce service life of equipment, also can have an impact to WFGD.
The fresh water (FW) of what WESP supplementing water was got is WFGD, salt content is higher, and the risk of pole plate fouling and corrosion is high, is to reduce risk, and the replaced water of equipment is larger, not easily balances with the rate of water make-up of WFGD.
Utility model content
Technical purpose of the present utility model solves the problems of the prior art, provides a kind of wet electrical dust precipitator " double loop " water circulation system, to realize water system process optimization, WESP replaced water can be adjusted in real time, and not by WFGD moisturizing quantitative limitation; Reducing the pollution level (as reduced suspension thing content, metal plasma content) of moisture film water circulation system, to reduce spray nozzle clogging risk, increasing service life of equipment.And use industry water water as a supplement instead; Realize the improvement of water circulation system, the stable operation of system be ensured, water consumption and the waste discharge amount of WESP should be reduced simultaneously.
For realizing the purpose of this utility model, the technical solution adopted in the utility model is: wet electrical dust precipitator " double loop " water circulation system, it is characterized in that, described water circulation system is provided with 2 closed circuits, is loop one respectively: wet electrical dust precipitator body → cyclic water tank → water circulating pump → self-cleaning filter → wet electrical dust precipitator body and loop two: wet electrical dust precipitator body → dense water tank → draining pump → integrated water treatment equipment → reuse pump → water supply tank → small pump → wet electrical dust precipitator body.
Aforesaid wet electrical dust precipitator " double loop " water circulation system, described water supply tank is connected with power plant industry water water stop by fresh water water pipe; Described water supply tank is connected with wet electrical dust precipitator with small pump by water pipe; Described loop one is connected to form by circulating water line.
Aforesaid wet electrical dust precipitator " double loop " water circulation system, described integrated water treatment equipment is connected with alkali chemicals dosing plant, heavy metal chelating agent chemicals dosing plant, flocculant chemicals dosing plant, sour chemicals dosing plant respectively; Described alkali chemicals dosing plant is also communicated with dense water tank with cyclic water tank respectively.
Aforesaid wet electrical dust precipitator " double loop " water circulation system, dense water tank is communicated with desulfurization water tank by outer discharge pipe line, and dense water tank is communicated with integrated water treatment equipment by recirculation water pipeline.
Aforesaid wet electrical dust precipitator " double loop " water circulation system; described cyclic water tank, dense water tank and integrated water treatment equipment are provided with pH meter; described alkali chemicals dosing plant, heavy metal chelating agent chemicals dosing plant, flocculant chemicals dosing plant, sour chemicals dosing plant, cyclic water tank and dense water tank are equipped with liquid level gauge, and described water pipe, outer discharge pipe line, recirculation water pipeline and circulating water line are provided with flowmeter; Nephelometer and TDS meter are set in draining pump outlet, nephelometer is set in water circulating pump outlet; Between the gateway of self-cleaning filter, differential manometer is set.
Aforesaid wet electrical dust precipitator " double loop " water circulation system, integrated water treatment equipment is connected with mortar pool by sludge delivery pump; Between dense water tank and cyclic water tank, overflow pipe is set.
The advantage compared with prior art had:
1) WESP water consumption can need flexible modulation according to plant running, non-wastewater discharge.The water system of existing WESP is subject to the restriction of WFGD rate of water make-up, water quality requirement, and is not equipped with wastewater treatment equipment, when the water yield cannot be mated, understands the discharge of some waste water.
2) integrated water treatment equipment, technique is simple, facility compact, occupation of land province, cost are economized, can process all or part of for the water outlet of dense water tank, water suspension content≤100mg/L after process, pH=6-7, metal ion content meet the regulation of GB8978, reduce spray nozzle clogging risk and increase service life of equipment.Water section reuse after process, reduces the magnitude of recruitment of fresh water, using water wisely.Arrange simultaneously and meet the demands to the water yield of WFGD, water quality, non-wastewater discharge.
Accompanying drawing explanation
Fig. 1 is system schematic of the present utility model;
Wherein, 1, water supply tank 2, wet electrical dust precipitator (i.e. WESP) 3, dense water tank 4, cyclic water tank 5, self-cleaning filter 6, integrated water treatment equipment 7, alkali chemicals dosing plant 8, heavy metal chelating agent chemicals dosing plant 9, flocculant chemicals dosing plant 10, acid chemicals dosing plant 11, desulfurization water tank 12, small pump 13, water circulating pump 14, draining pump 15, reuse pump 16, sludge delivery pump 17, water pipe 18, circulating water line 19, to give a dinner of welcome water discharge pipe road 20, recirculated water discharge line 21, periodic flushing discharge pipe line 22, recirculation water pipeline 23, outer discharge pipe line 24, fresh water water pipe.
Detailed description of the invention
The technical scheme realized for making the utility model, technical characteristic, reaching object and effect is easy to understand, below in conjunction with detailed description of the invention and accompanying drawing, setting forth the utility model further.
Wet electrical dust precipitator " double loop " water circulation system, it is characterized in that, described water circulation system is provided with 2 closed circuits, is loop one respectively: wet electrical dust precipitator 2 → cyclic water tank 4 → water circulating pump 13 → self-cleaning filter 5 → wet electrical dust precipitator 2 and loop two: wet electrical dust precipitator → dense water tank 3 → draining pump 14 → integrated water treatment equipment 6 → reuse pump 15 → water supply tank 1 → small pump 12 → wet electrical dust precipitator.Described water supply tank 1 is connected with power plant industry water water stop by fresh water water pipe 24; Described water supply tank is connected with wet electrical dust precipitator with small pump 12 by water pipe 17.Described integrated water treatment equipment is connected with alkali chemicals dosing plant 7, heavy metal chelating agent chemicals dosing plant 8, flocculant chemicals dosing plant 9, sour chemicals dosing plant 10 respectively; Described alkali chemicals dosing plant 7 is also communicated with dense water tank 3 with cyclic water tank 4 respectively.Agitator is equipped with in dense water tank and cyclic water tank.Dense water tank 3 is communicated with desulfurization water tank 11 by outer discharge pipe line 23, and dense water tank is communicated with integrated water treatment equipment 6 by recirculation water pipeline 22.Described cyclic water tank, dense water tank and integrated water treatment equipment are provided with pH meter; described alkali chemicals dosing plant, heavy metal chelating agent chemicals dosing plant, flocculant chemicals dosing plant, sour chemicals dosing plant, cyclic water tank and dense water tank are equipped with liquid level gauge, and described water pipe 17, outer discharge pipe line 23, recirculation water pipeline 22 and circulating water line 18 are provided with flowmeter; Nephelometer and TDS meter are set in draining pump outlet, nephelometer is set in water circulating pump outlet; Between the gateway of self-cleaning filter, differential manometer is set.Integrated water treatment equipment is connected with mortar pool by sludge delivery pump 16; Between dense water tank and cyclic water tank, overflow pipe is set.
The course of work of the present utility model is as follows:
1) when WESP normally runs:
(A) water of cyclic water tank 4 li is delivered to self-cleaning filter 5(by water circulating pump 13 and is tackled large particulate matter), then enter WESP through circulating water line 18.Meanwhile, regulate small pump 12 flow that the water of water supply tank 1 li is sent into WESP through water pipe 17.The more muddy water that WESP discharges, enters dense water tank 3 through water discharge pipe road 19 of giving a dinner of welcome; The comparatively clean water that WESP discharges, enters cyclic water tank 4 through recirculated water discharge line 20.The pH of pH meter Real-Time Monitoring cyclic water tank and dense water tank, and chain control alkali measuring pump (JP-1, JP-2) regulates pH respectively to adding alkali in cyclic water tank and dense water tank.
(B) dense water tank arranges overflow pipe to cyclic water tank (the normal condition overflow water yield is little).Water in dense water tank is sent by draining pump 14, and desulfurization water tank 11 is delivered to through outer discharge pipe line 23 in a road, and another road enters integrated water treatment equipment 6 through recirculation water pipeline 22.Draining pump 14 exports the turbidity of Real-Time Monitoring water and electrical conductivity is no more than setting value.If super, close the valve removing desulfurization water tank, water all enters integrated water treatment equipment; If do not surpass, regulate suitable flow, discharge a part of water to desulfurization water tank.
(C) water of integrated water treatment equipment is entered, monitor its flow, and chain control alkali measuring pump (JP-3), heavy metal chelating agent measuring pump (JP-4) and flocculant measuring pump (JP-5) add appropriate medicament, water outlet adds acid treatment and regulates pH=6-7.Water after integrated water treatment equipment process sends into water supply tank 1 reuse by reuse pump 15 part, and sediment delivers to mortar pool by sludge delivery pump 16.
(D) fresh water filled in water supply tank, from power plant's industry water water stop.
2) when WESP polar curve, pole plate rinse:
Open flushing water inlet valve, open small pump 12, water delivers to WESP interior flushing water distributor, nozzle through water pipe 17.Flush discharge all enters dense water tank 3 through periodic flushing discharge pipe line 21, the pH of the dense water tank of pH meter Real-Time Monitoring, and chain control alkali measuring pump (JP-2) adds alkali adjustment pH in dense water tank.Water in dense water tank is sent by draining pump 14, enters integrated water treatment equipment 6 through recirculation water pipeline 22.Lower to (C), (D).
3) when WESP total moisturizing quantitative change is large:
With: (A), (B) (C), (D).Difference: the inflow increasing integrated water treatment equipment, increases the reuse amount of the rear water of process.Magnitude of recruitment and the water yield entering desulfurization water tank of fresh water, regulate according to demand.
4) when the total rate of water make-up of WESP reduces:
With: (A), (B) (C), (D).Difference: the inflow reducing integrated water treatment equipment, reduces the reuse amount of the rear water of process.Magnitude of recruitment and the water yield entering desulfurization water tank of fresh water, regulate according to demand.
5) WESP is out of service:
With: (A), (B) (C), (D).Difference: stop filling into of fresh water, close the valve removing desulfurization water tank, water all enters integrated water treatment equipment, and the water fully recovering after process, water system starts water self-cleaning.After running a period of time, after system water qualitative change is clear, stop the operation of water system.Manually discharge whole water in system as required.
Novelty of the present invention is:
Increase water treatment facilities (i.e. integrated water treatment equipment) of giving a dinner of welcome, and the water yield fluctuation in certain limit can be adapted to, ensure that the WESP displacement water yield is coupled smoothly with the rate of water make-up of WFGD, not by the restriction of WFGD water consumption.Ensure the stable of water system.
By water quality displacement and processing procedure, separate from moisture film water-flow circuit and form independent loop.Avoid interacting of water treatment procedure and moisture film water loop.
Give a dinner of welcome water treatment facilities, being made of one equipment, has that technique is simple, an advantage that facility compact, occupation of land province, cost are economized.To give a dinner of welcome water reuse more after treatment, significantly reduce magnitude of recruitment and the wastewater discharge of fresh water, water-saving and emission-reducing.
After water treatment facilities process of giving a dinner of welcome, the metal ion in water generates precipitation of hydroxide; Suspension, Hg
2+, Pb
2+be removed under heavy metal chelating agent and flocculant effect Deng heavy metal contaminants.To give a dinner of welcome water treatment facilities water outlet: suspension content≤100mg/L, pH=6-7, metal ion content meet the regulation of GB8978.Suspension and metal ion content reduce, and reach bypass and to purify waste water the object of the circulatory system.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. wet electrical dust precipitator " double loop " water circulation system, it is characterized in that, described water circulation system is provided with 2 closed circuits, is loop one respectively: wet electrical dust precipitator body → cyclic water tank → water circulating pump → self-cleaning filter → wet electrical dust precipitator body and loop two: wet electrical dust precipitator → dense water tank → draining pump → integrated water treatment equipment → reuse pump → water supply tank → small pump → wet electrical dust precipitator body.
2. wet electrical dust precipitator according to claim 1 " double loop " water circulation system, is characterized in that, described water supply tank is connected with power plant industry water water stop by fresh water water pipe; Described water supply tank is connected with wet electrical dust precipitator with small pump by water pipe; Described loop one is connected to form by circulating water line.
3. wet electrical dust precipitator according to claim 1 and 2 " double loop " water circulation system, it is characterized in that, described integrated water treatment equipment is connected with alkali chemicals dosing plant, heavy metal chelating agent chemicals dosing plant, flocculant chemicals dosing plant, sour chemicals dosing plant respectively; Described alkali chemicals dosing plant is also communicated with dense water tank with cyclic water tank respectively.
4. wet electrical dust precipitator according to claim 3 " double loop " water circulation system, is characterized in that, dense water tank is communicated with desulfurization water tank by outer discharge pipe line, and dense water tank is communicated with integrated water treatment equipment by recirculation water pipeline.
5. wet electrical dust precipitator according to claim 3 " double loop " water circulation system; it is characterized in that; described cyclic water tank, dense water tank and integrated water treatment equipment are provided with pH meter; described alkali chemicals dosing plant, heavy metal chelating agent chemicals dosing plant, flocculant chemicals dosing plant, sour chemicals dosing plant, cyclic water tank and dense water tank are equipped with liquid level gauge, and described water pipe, outer discharge pipe line, recirculation water pipeline and circulating water line are provided with flowmeter; Nephelometer and TDS meter are set in draining pump outlet, nephelometer is set in water circulating pump outlet; Between the gateway of self-cleaning filter, differential manometer is set.
6. wet electrical dust precipitator according to claim 3 " double loop " water circulation system, it is characterized in that, integrated water treatment equipment is connected with mortar pool by sludge delivery pump; Between dense water tank and cyclic water tank, overflow pipe is set.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520615661.5U CN205032283U (en) | 2015-08-14 | 2015-08-14 | Wet -type electrostatic precipitator " two return circuit " water circulating system |
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| CN201520615661.5U CN205032283U (en) | 2015-08-14 | 2015-08-14 | Wet -type electrostatic precipitator " two return circuit " water circulating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430476A (en) * | 2016-08-26 | 2017-02-22 | 浙江天地环保科技有限公司 | Process system for reducing outside drainage of wet electrostatic dust precipitation system |
| CN106733186A (en) * | 2017-01-06 | 2017-05-31 | 浙江浙能嘉华发电有限公司 | A kind of wet electric back segment spray program and optimization water-saving method |
-
2015
- 2015-08-14 CN CN201520615661.5U patent/CN205032283U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430476A (en) * | 2016-08-26 | 2017-02-22 | 浙江天地环保科技有限公司 | Process system for reducing outside drainage of wet electrostatic dust precipitation system |
| CN106733186A (en) * | 2017-01-06 | 2017-05-31 | 浙江浙能嘉华发电有限公司 | A kind of wet electric back segment spray program and optimization water-saving method |
| CN106733186B (en) * | 2017-01-06 | 2018-03-16 | 浙江浙能嘉华发电有限公司 | A kind of wet electric back segment spray program and optimization water-saving method |
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