CN201785271U - Compressed air back-washing desulfuration wastewater treatment system - Google Patents
Compressed air back-washing desulfuration wastewater treatment system Download PDFInfo
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- CN201785271U CN201785271U CN2010205298584U CN201020529858U CN201785271U CN 201785271 U CN201785271 U CN 201785271U CN 2010205298584 U CN2010205298584 U CN 2010205298584U CN 201020529858 U CN201020529858 U CN 201020529858U CN 201785271 U CN201785271 U CN 201785271U
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model discloses a compressed air back-washing desulfuration wastewater treatment system, which comprises an aeration tank (1), a primary settling tank (2), an adjusting tank (3), a neutralizing box (4), a settling box (5), a flocculating box (6), a concentrating clarification tank (7), a clear water box (8) and a sludge box (9); the neutralizing box (4), the settling box (5) and the flocculating box (6) are arranged side by side and are integrated into a triple box; wherein the aeration tank (1), the primary settling tank (2), the adjusting tank (3), the triple box and the concentrating clarification tank (7) are sequentially communicated with one another via a pipeline; and the upper part of the concentrating clarification tank (7) is communicated with the clear water tank (8) via a pipeline, and the bottom is communicated with the sludge box (9) via a pipeline. The utility model is unique in design; and through the arrangement of the aeration tank, the primary settling tank and a compressed air pipeline, the phenomena that COD (Chemical Oxygen Demand) of outlet water of the desulfuration wastewater treatment exceeds the standard and the device blocked by sludge are avoided, and the stability of desulfuration wastewater treatment is enhanced at the same time.
Description
Technical field
The utility model relates to a kind of water treatment system, relates in particular to the water treatment system of pressurized air back flushing desulfurization wastewater.
Background technology
For the wet process of FGD technology, its desulfurization wastewater is slightly acidic, contains a large amount of heavy metal elements and suspended solids.Therefore, the processing of desulfurization wastewater mainly is with chemical-mechanical sedimentation method separating beavy metal and other precipitable thing (as fluorochemical, sulphite, vitriol etc.).At present the domestic typical waste water treatment process discharge characteristics that all is based on desulfurization wastewater is derived and is come, and therefore, traditional desulfurization wastewater processing technological flow generally is made up of three parts such as Waste Water Treatment, sludge dewatering system, chemical medicine systems.Wherein, Waste Water Treatment is made up of three headers (in and case, sludge box, flocculation tanks), concentrating clarifying pond, outlet sump three parts.
Cause the COD of waste water higher owing to contain a large amount of sulphite, nitrite and other reducing inorganic salt in the desulfurization wastewater, and domestic desulfurization wastewater treatment process is a materilization freatment method, from present operation power plant's investigation preferably, except that COD was not up to standard, other pollution factors all reached national grade one discharge standard.Simultaneously, contain many small suspended substances and colloidalmaterial in the desulfurization wastewater and be difficult to effective sedimentation,, in waste water, add flocculation agent (FeClSO for improving the settling property of these finely ground particles
4), coagulant aids (PAM), by charge neutrality, effect such as absorption crane span structure etc., make it to be condensed into easily sedimentary big throw out.Therefore, in the operational process of desulfurization wastewater device, a large amount of sediment piles form a large amount of mud, as fail in time to extract settling tank bottom mud and will cause the settling pond inlet flume to stop up.Its presentation is exactly that settling pond is intake some through settling pond swash plate but directly overflow from inlet flume top, causes the effluent quality muddiness, and turbidity raises unusual.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of and avoids desulfurization wastewater treat effluent COD to exceed standard and avoid device by sludge blockage, strengthens the pressurized air back flushing desulfurization wastewater treatment system of the stability that desulfurization wastewater handles simultaneously.
The following a kind of pressurized air back flushing desulfurization wastewater treatment system of the technical solution of the utility model, its key is: this desulfurization wastewater treatment system by aeration tank, preliminary sedimentation tank, equalizing tank, in and case, sludge box, flocculation tanks, concentrating clarifying pond, filtered water tank, mud case form, described in and case, sludge box and integrally formed side by side three headers of flocculation tanks; Wherein said aeration tank, preliminary sedimentation tank, equalizing tank, three headers and concentrating clarifying pond are successively through pipeline UNICOM, and top, described concentrating clarifying pond is through pipeline UNICOM filtered water tank, and this bottom, concentrating clarifying pond is through pipeline UNICOM mud case.
The desulfurization wastewater of FGD system discharging is introduced into the aerating wastewater pond, by the aerating apparatus that is arranged at the bottom of the pond desulfurization wastewater is carried out abundant aeration (waste water is regulated the aeration tube of bottom, aeration tank and evenly arranged, do not stay the dead angle), after reducing the COD value of waste water in the pond, be delivered to preliminary sedimentation tank through the waste water lift pump, in the pond, stop after 1～2 hour and enter equalizing tank, its bottom mud enters the mud case, during supernatant liquor just enters subsequently and case.In and add milk of lime by the milk of lime chemicals dosing plant in the case, wastewater pH is adjusted to 8.5～9.5, make some heavy metal ion such as Fe
3+, Cu
2+Deng the generation precipitation of hydroxide.Waste water in and stop 45 min in the case after enter sludge box, with the organosulfur (TMT15) that adds thorough mixing reaction under the effect of agitator, make Hg
2+, Cu
2+And Pb
2+Generate the sulfide of indissoluble in heavy metal.Waste water enters flocculation tanks stop 45 min in sludge box after, generates a large amount of throw outs with the flocculation agent that adds under the effect of agitator; Waste water enters settling pond stop 45 min in flocculation tanks after.Simultaneously, add the high molecular polymerization ionogen in the pipeline in the flocculation tanks water outlet, before advancing settling pond, make the throw out surface tension reduce, slowly become the bigger flock of volume as coagulant aids (PAM), so as in settling pond precipitation, separate.Desulfurization wastewater enters settling pond from flocculation tanks gravity flow, and the flock in the waste water in the settling pond bottom, is condensed into body refuse in the effect deposit of gravity settling, is removed by Scraping device; Clear water then rises to the top and flow to filtered water tank certainly by annular triangle overflow weir, and the HC1 reaction with adding makes water outlet pH value reduce to 6～9, qualified discharge.
Above-mentioned preliminary sedimentation tank bottom blow-down pipe connection is to the mud case.
For preventing that the sludge carrier pipe road from stopping up, pneupress system is established at preliminary sedimentation tank, concentrating clarifying pond, three headers bottom mud discharging pipe outlet and top, aeration tank.When delivery turbidity is unusual or too high, when stopping up appears in the shore pipe road, at first stop into water, regularly tank is dredged by pressurized air again.During use, can just open the pressurized air inlet valve after every operation for some time, pressurized air is injected at waste water system, by air diffuser flume wall is washed away, avoid mud to pile up blocking pipe, mud twice is taken out in suggestion weekly, utilizes sheet frame to press the mud machine to be pressed into mud cake and transports outside the factory and handle.
Beneficial effect: the utility model design is unique, is provided with the aeration tank to lower water outlet COD value, makes effluent quality reach national grade one discharge standard; It is too high to the follow-up influence that adds dose to reduce because of desulfurization wastewater water source solid holdup that preliminary sedimentation tank is set, and adds dose thereby reduce, and reduces cost; Compressed air line is set, regularly flume wall is washed away, avoid mud to pile up blocking pipe, keep the stability of desulphurization system operation by air diffuser.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described.
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of pressurized air back flushing of the utility model desulfurization wastewater treatment system, by aeration tank 1, preliminary sedimentation tank 2, equalizing tank 3, in and case 4, sludge box 5, flocculation tanks 6, concentrating clarifying pond 7, filtered water tank 8, mud case 9 form, described in and case 4, sludge box 5 and integrally formed side by side three headers of flocculation tanks 6; Wherein said aeration tank 1, preliminary sedimentation tank 2, equalizing tank 3, three headers and concentrating clarifying pond 7 are successively through pipeline UNICOM, and 7 tops, described concentrating clarifying pond are through pipeline UNICOM filtered water tank 8, and these 7 bottoms, concentrating clarifying pond are through pipeline UNICOM mud case 9.Described preliminary sedimentation tank 2 bottom blow-down pipe connection are to mud case 9.Described preliminary sedimentation tank 2, concentrating clarifying pond 7, in and case 4, sludge box 5 and flocculation tanks 6 bottom mud discharging pipe outlets and 1 top, aeration tank establish pneupress system, the solid line management all is a desulfurization wastewater pipeline 10 among the figure, the dotted line pipeline is pneumatic line 11.
Although below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic rather than determinate; those of ordinary skill in the art is under enlightenment of the present utility model; under the prerequisite of the utility model aim and claim; can make multiple similar expression, such conversion all falls within the protection domain of the present utility model.
Claims (3)
1. pressurized air back flushing desulfurization wastewater treatment system, it is characterized in that: this desulfurization wastewater treatment system by aeration tank (1), preliminary sedimentation tank (2), equalizing tank (3), in and case (4), sludge box (5), flocculation tanks (6), concentrating clarifying pond (7), filtered water tank (8), mud case (9) form, described in and case (4), sludge box (5) and integrally formed side by side three headers of flocculation tanks (6); Wherein said aeration tank (1), preliminary sedimentation tank (2), equalizing tank (3), three headers and concentrating clarifying pond (7) are successively through pipeline UNICOM, top, described concentrating clarifying pond (7) is through pipeline UNICOM filtered water tank (8), and this bottom, concentrating clarifying pond (7) is through pipeline UNICOM mud case (9).
2. according to the described pressurized air back flushing of claim 1 desulfurization wastewater treatment system, it is characterized in that: described preliminary sedimentation tank (2) bottom blow-down pipe connection is to mud case (9).
3. according to the described pressurized air back flushing of claim 2 desulfurization wastewater treatment system, it is characterized in that: described preliminary sedimentation tank (2), concentrating clarifying pond (7), in and case (4), sludge box (5) and flocculation tanks (6) bottom mud discharging pipe outlet and top, aeration tank (1) establish pneupress system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205298584U CN201785271U (en) | 2010-09-15 | 2010-09-15 | Compressed air back-washing desulfuration wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205298584U CN201785271U (en) | 2010-09-15 | 2010-09-15 | Compressed air back-washing desulfuration wastewater treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201785271U true CN201785271U (en) | 2011-04-06 |
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ID=43817246
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205298584U Expired - Fee Related CN201785271U (en) | 2010-09-15 | 2010-09-15 | Compressed air back-washing desulfuration wastewater treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174580A (en) * | 2015-08-25 | 2015-12-23 | 天津市华通寰昊水务科技有限公司 | Desulphurization waste-water zero discharge processing system and technology |
| CN105330081A (en) * | 2015-12-01 | 2016-02-17 | 上海龙净环保科技工程有限公司 | Method and system suitable for zero discharge of desulfurization waste water of power plant |
-
2010
- 2010-09-15 CN CN2010205298584U patent/CN201785271U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174580A (en) * | 2015-08-25 | 2015-12-23 | 天津市华通寰昊水务科技有限公司 | Desulphurization waste-water zero discharge processing system and technology |
| CN105330081A (en) * | 2015-12-01 | 2016-02-17 | 上海龙净环保科技工程有限公司 | Method and system suitable for zero discharge of desulfurization waste water of power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20140915 |
|
| EXPY | Termination of patent right or utility model |