CN208916969U - Preliminary sedimentation underflow returns to gypsum second level dewatering system - Google Patents
Preliminary sedimentation underflow returns to gypsum second level dewatering system Download PDFInfo
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- CN208916969U CN208916969U CN201821496101.2U CN201821496101U CN208916969U CN 208916969 U CN208916969 U CN 208916969U CN 201821496101 U CN201821496101 U CN 201821496101U CN 208916969 U CN208916969 U CN 208916969U
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Abstract
The utility model relates to environmental protection technical fields; disclose a kind of preliminary sedimentation underflow return gypsum second level dewatering system; including preliminary sedimentation tank and gypsum dehydration machine; the preliminary sedimentation bottom of pond portion is equipped with frequency conversion slush pump; the preliminary sedimentation bottom of pond portion is connected with thick plaster slurry storage tank by sludge pump, and the thick plaster slurry storage tank is connected with gypsum dehydration machine.Preliminary sedimentation tank uses the pattern of cylindrical mechanical accelerating purifying pool, central feeding cylinder is set, overflow weir and cylinder low speed mud scraper, according to the size of desulfurization wastewater inflow, design its volume, guarantee that the natural sedimentation time of waste water is greater than 10 hours, in this preformed precipitate stage, does not add any chemical agent for having flocculation in waste water.The higher sludge of hardness will not be generated to block gypsum dehydration machine, to ensure that the normal use of gypsum dehydration machine, reduce failure rate.
Description
Technical field
The utility model relates to environmental protection technical field, in particular to a kind of preliminary sedimentation underflow returns to gypsum second level dehydration system
System.
Background technique
Domestic thermal power plant desulfuration waste water treatment process is essentially physico-chemical process at present, is the huge sum of money in desulfurization wastewater for substance
Belong to ion, acid group, halogen family ion and suspended matter etc., is removed by the methods of neutralization, precipitating, flocculation main in desulfurization wastewater
Pollutant reaches the requirement of national emission standard.Mainly by three system groups such as wastewater treatment, agent-feeding treatment and Treatment of Sludge
At.
Desulfuration absorbing tower periodically discharges desulfurization wastewater outward, carries out cyclonic separation using centrifugal force by waste-water vortex device,
Top stream waste water is discharged into desulfurization wastewater processing workshop, removes beavy metal impurity and suspended matter etc..In removal process, original desulfurization wastewater
In the part gypsum crystal that contains can precipitate together with objectionable impurities in waste water, form sediment sludge, arranged through sludge pump
To plate and frame type filter-press, fraction sludge returns to neutralization reaction case as contact sludge, and nucleus needed for providing precipitating is most of
Sludge is taken as solid waste, needs to exclusively carry out processing.
Notification number is that the Chinese patent of CN205590456U discloses a kind of desulfurization wastewater processing dress of low sludge yield
It sets, comprising: the primary sedimentation tank with a desulfurization wastewater water pipeline connection, bottom are equipped with one first spoil disposal pipeline；First spoil disposal
Pipeline is connected to a gypsum dehydration machine, and gypsum dehydration machine has a filtrate outlet, filtrate outlet by a return line with
The first flocculation tank connection.The device can reduce the sludge yield in desulfurization wastewater treatment process, reduce desulfurization
Cost for wastewater treatment, and the possibility of secondary pollution generation is effectively reduced.
The principle of gypsum dehydration is vacuum type dewaterer, and desulfurization wastewater is gone to aqueous 10% left side in the way of vacuumizing
Right finished product gypsum.Slurries are flowed on top after the separation of gypsum cyclone, are again introduced into desulfurization wastewater cyclone and are separated.But
Since the sludge after desulfurization wastewater precipitating joined the drugs such as Ca (OH) 2 and flocculant, it is de- that this sludge once enters gypsum second level
In water system, the filter cloth hole plug of gypsum second level dewatering system will lead to, conventional flushing water can not be cleared up.Since filter cloth hole is stifled
After plug, the operation vacuum degree of vacuum hydroextractor is very high, but the moisture content of gypsum slurries can not be pumped, and affects entire gypsum second level
Dewatering system, failure rate are higher.
Utility model content
The purpose of the utility model is to provide a kind of preliminary sedimentation underflows to return to gypsum second level dewatering system, has guarantee system energy
The advantages of consumption and failure rate.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of preliminary sedimentation underflow return gypsum second level dewatering system, including preliminary sedimentation tank and gypsum dehydration machine, the preliminary sedimentation tank bottom
Portion is equipped with frequency conversion slush pump, and the preliminary sedimentation bottom of pond portion is connected with thick plaster slurry storage tank, the thick plaster slurry storage by frequency conversion slush pump
Tank is connected with gypsum dehydration machine.
By using above-mentioned technical proposal, a preliminary sedimentation tank is added at desulfurization wastewater cyclone, preliminary sedimentation tank is using cylindrical
Central feeding cylinder, overflow weir and cylinder low speed mud scraper is arranged, according to desulfurization wastewater inflow in the pattern of mechanical accelerating purifying pool
Size, design its volume, guarantee waste water the natural sedimentation time be greater than 10 hours, in this preformed precipitate stage, do not add in waste water
Add any chemical agent for having flocculation.The higher sludge of hardness will not be generated to block gypsum dehydration machine, to protect
The normal use of gypsum dehydration machine has been demonstrate,proved, failure rate is reduced.In order to avoid solid particle is hardened in preliminary sedimentation tank bottom, in pond
The mud scraper of a slow-speed of revolution is arranged in heart cylinder bottom, can effectively avoid influencing precipitating after also avoiding high-speed stirred while deposition
Effect.Increase frequency conversion slush pump in the bottom of preliminary sedimentation tank, solves sludge in prior art scheme and want to recycle but be difficult to recycle
Problem.
Frequency conversion type slush pump is set using preliminary sedimentation bottom of pond portion, the microlith cream crystal grain after natural sedimentation is pumped to gypsum
In underflow storage tank, the gypsum slurries of solid content 50% or so are stored in this dense storage tank, thick plaster slurry storage tank itself has certain delay
Memory capacity is rushed, can guarantee that the vacuum degree of gypsum dehydration machine works in preferable state always.
Further, the concentration ratio of concentration of slurry and slurries in thick plaster slurry storage tank is 1:20 in the preliminary sedimentation tank.
By using above-mentioned technical proposal, under the mixing of this ratio, a small amount of fine grained gypsum crystal be will not influence just
The second level dewatering system of normal gypsum crystal carries out, and can guarantee that the vacuum degree of vacuum hydroextractor always works in optimum state point.
The failure rate of gypsum dehydration machine is reduced, working efficiency is improved.
Further, the upper end of the preliminary sedimentation tank is connected with three headers.
By using above-mentioned technical proposal, the desulfurization wastewater supernatant after preformed precipitate go successively to former neutralization, sedimentation,
In flocculation tanks, carry out dosing precipitation process, waste water solid content at this time will substantially reduce, solve former desulfurization wastewater neutralize, sedimentation,
The problem of three header bottom frequent jams of flocculating lead to system fluctuation of service.
Further, it is attached between the preliminary sedimentation tank and three headers by buffer tank.
By using above-mentioned technical proposal, buffer tank further settles the slurries in preliminary sedimentation tank, further drops
Solid content in low waste water improves the stability of three headers.
Further, three header is connected with sedimentation basin far from the side of preliminary sedimentation tank.
By using above-mentioned technical proposal, when waste water is handled in three headers, the impurity in waste water forms flocculence
It is settled, waste water be again introduced into sedimentation basin after three headers are handled and precipitated, the solid that will be parsed in waste water
Impurity carries out sedimentation discharge, reduces the solid content of waste water.
Further, cleaning shoe is equipped in the sedimentation basin.
By using above-mentioned technical proposal, cleaning shoe carries out scraping mud to the bottom of sedimentation basin, avoids solid particle pre-
It is heavy that bottom of pond portion is hardened to be discharged.
Further, the upper end of the thick plaster slurry storage tank is connected with drainpipe, and the drainpipe is connected with accident pool.
By using above-mentioned technical proposal, after production accident occurs in factory, the waste water in thick plaster slurry storage tank is discharged into accident
Safety is improved for storing accident water in pond.
In conclusion the utility model has the following beneficial effects:
1. the solid content of desulfurization wastewater can be effectively reduced, former desulfurization wastewater neutralization, sedimentation, three header bottoms of flocculation are solved
Frequent jams lead to the problem of system fluctuation of service；
2. having found preformed precipitate slurries returns to the best point of penetration of gypsum second level dewatering system, while having grasped blending and having matched
Than, and can be controlled to adjust by automated manner；
3. gypsum resource has obtained abundant reuse, reduce the generation of solid waste, the microlith in original desulfurization wastewater
Cream particle all needs to mix with impurity such as heavy metals, by dosing precipitation process finally further through plate and frame filter press
It extrudes, becomes solid waste, need special disposal, influence environment.Increase preformed precipitate link, and preliminary sedimentation is starched and returns to gypsum
After second level dewatering system, resource has sufficiently obtained reuse, turns waste into wealth；
4. desulfurization wastewater producing water water quality can be improved because solid-liquid is efficiently separated in front end.
Detailed description of the invention
Fig. 1 is the system schematic of embodiment.
In figure, 1, preliminary sedimentation tank；2, buffer tank；3, neutralizing tank；4, settling tank；5, flocculation tank；6, sedimentation basin；7, waste water revolves
Flow device；8, frequency conversion slush pump；9, three header water supply pump；10, thick plaster slurry storage tank；11, gypsum delivery pump；12, gypsum dehydration machine；
13, three header；14, cleaning shoe；15, drainpipe；16, accident pool；17, mud scraper.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Wherein identical components are presented with like reference characters.It should be noted that word used in the following description
Language "front", "rear", "left", "right", "up" and "down" refer to the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and
"outside" refers respectively to the direction towards or away from geometric center of specific component.
Embodiment:
A kind of preliminary sedimentation underflow return gypsum second level dewatering system, such as Fig. 1, including waste-water vortex device 7, preliminary sedimentation tank 1, three headers
13 and thick plaster slurry storage tank 10.
Such as Fig. 1, waste-water vortex device 7 is connected with the upper end of preliminary sedimentation tank 1, and waste water enters in preliminary sedimentation tank 1 from waste-water vortex device 7
Natural sedimentation is carried out, does not add any medicament, agglomeration blocking follow-up equipment is prevented, influences the use of system.
If the bottom of Fig. 1, preliminary sedimentation tank 1 are equipped with frequency conversion slush pump 8, frequency conversion slush pump 8 is connected with mud scraper 17, and mud scraper 17 is right
1 bottom of preliminary sedimentation tank is stirred, and avoids solid particle hardened in 1 bottom of preliminary sedimentation tank.Mud scraper 17 is low speed mud scraper, effectively
It avoids influencing sedimentation effect after also avoiding high-speed stirred while deposition.
Such as Fig. 1, the upper end of preliminary sedimentation tank 1 is connected with buffer tank 2, and the desulfurization wastewater supernatant after preformed precipitate enters buffering
Water tank 2 is further settled, and the solid content in waste water is further decreased, and reduces sludge quantity during subsequent desilt.
Such as Fig. 1, buffer tank 2 is connected with three headers 13 by two three header water supply pumps 9, three headers 13 include neutralizing tank 3,
Settling tank 4 and flocculation tank 5, preliminary sedimentation tank 1 and buffer tank 2 carry out precipitating discharge to solid suspension original in waste water, and three
Case 13 is precipitated out the harmful ion in waste water to waste water progress neutralization reaction and sludge is discharged together, carries out to waste water
Filter, reduces the pollution of waste water.
Such as Fig. 1, flocculation tank 5 is connected with sedimentation basin 6, and 6 pairs of sedimentation basin carry out precipitating filtering by the waste water of three headers 13, will give up
Flocculence solid in water is discharged, and the solid content of waste water is reduced.
Such as Fig. 1, sedimentation basin 6 is interior to be equipped with cleaning shoe 14, and cleaning shoe 14 is identical as the effect of mud scraper 17, avoids solid particle
Hardened in 1 bottom of preliminary sedimentation tank.
Such as Fig. 1, the bottom of preliminary sedimentation tank 1 is connected with frequency conversion slush pump 8, and frequency conversion slush pump 8 is connected with thick plaster slurry storage tank 10, stone
Cream underflow storage tank 10 is connected by delivery pump with gypsum dehydration machine 12.Using 1 bottom of preliminary sedimentation tank, frequency conversion slush pump 8 is set, it will be certainly
So the microlith cream crystal grain after precipitating is pumped in the thick plaster slurry storage tank 10 of gypsum second level dehydration link, rather than is directly returned
It returns on the gypsum dehydration machine 12 of gypsum second level dehydration；The calcium plaster of solid content 50% or so is stored in this thick plaster slurry storage tank 10
Liquid, storage tank itself have certain buffering memory size, by continuous Test Summary and groping, have found and optimal mix formula
Case.In normal course of operation, the frequency of 1 bottom frequency conversion slush pump 8 of preliminary sedimentation tank and the slurries liquid of thick plaster slurry storage tank 10 are set
The corresponding relationship of position, allows the ratio of 1 slurries of preliminary sedimentation tank and the slurries in thick plaster slurry storage tank 10 accurately to control in 1:20, at this
Under a ratio mixing, the second level dewatering system that a small amount of fine grained gypsum crystal will not influence normal gypsum crystal is carried out, can
Guarantee that the vacuum degree of vacuum hydroextractor always works in optimum state point.The frequency conversion slush pump 8 of 1 central tube bottom of preliminary sedimentation tank, also
Certain adjust automatically amount of bias can be set according to the thickness of gypsum filter cake in gypsum second level dewatering system, to guarantee automatic shape
The vacuum degree of gypsum second level dewatering system maintains reasonable range etc under state, and overall process does not need to intervene manually.
Such as Fig. 1, thick plaster slurry storage tank 10 is connected with accident pool 16, when trying to avert accidents, thick plaster slurry by drainpipe 15
Pollution environment is arbitrarily discharged in the waste water of storage tank 10.
Specific implementation process: waste water is discharged into preliminary sedimentation tank 1 from waste-water vortex device 7 and precipitates, and the supernatant of preliminary sedimentation tank 1 passes through
Buffer tank 2 further precipitates, and then removes impurity by three headers, 13 neutralization reaction, eventually passes through sedimentation basin 6 and sink again
It forms sediment, the supernatant of sedimentation basin 6 is discharged into next melded system.The underflow of 1 bottom of preliminary sedimentation tank enters stone by frequency conversion slush pump 8
In cream underflow storage tank 10, it is discharged eventually by gypsum delivery pump 11.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (7)
1. a kind of preliminary sedimentation underflow returns to gypsum second level dewatering system, including preliminary sedimentation tank (1) and gypsum dehydration machine (12), feature exists
In: preliminary sedimentation tank (1) bottom is equipped with frequency conversion slush pump (8), and preliminary sedimentation tank (1) bottom is connected with by frequency conversion slush pump (8)
Thick plaster slurry storage tank (10), the thick plaster slurry storage tank (10) are connected with gypsum dehydration machine (12).
2. preliminary sedimentation underflow according to claim 1 returns to gypsum second level dewatering system, it is characterised in that: the preliminary sedimentation tank
(1) the concentration ratio of interior concentration of slurry and thick plaster slurry storage tank (10) interior slurries is 1:20.
3. preliminary sedimentation underflow according to claim 1 returns to gypsum second level dewatering system, it is characterised in that: the preliminary sedimentation tank
(1) upper end is connected with three headers (13).
4. preliminary sedimentation underflow according to claim 3 returns to gypsum second level dewatering system, it is characterised in that: the preliminary sedimentation tank
(1) it is attached between three headers (13) by buffer tank (2).
5. preliminary sedimentation underflow according to claim 3 returns to gypsum second level dewatering system, it is characterised in that: three header
(13) side far from preliminary sedimentation tank (1) is connected with sedimentation basin (6).
6. preliminary sedimentation underflow according to claim 1 returns to gypsum second level dewatering system, it is characterised in that: the sedimentation basin
(6) cleaning shoe (14) are equipped in.
7. preliminary sedimentation underflow according to claim 1 returns to gypsum second level dewatering system, it is characterised in that: the thick plaster slurry
The upper end of storage tank (10) is connected with drainpipe (15), and the drainpipe (15) is connected with accident pool (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821496101.2U CN208916969U (en) | 2018-09-12 | 2018-09-12 | Preliminary sedimentation underflow returns to gypsum second level dewatering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821496101.2U CN208916969U (en) | 2018-09-12 | 2018-09-12 | Preliminary sedimentation underflow returns to gypsum second level dewatering system |
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| CN208916969U true CN208916969U (en) | 2019-05-31 |
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| CN201821496101.2U Active CN208916969U (en) | 2018-09-12 | 2018-09-12 | Preliminary sedimentation underflow returns to gypsum second level dewatering system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078340A (en) * | 2019-06-03 | 2019-08-02 | 广州珠江电力有限公司 | A kind of desulfurization wastewater sludge recycling system and method |
| CN113248056A (en) * | 2021-06-28 | 2021-08-13 | 润电能源科学技术有限公司 | Desulfurization waste water gypsum sludge treatment system |
-
2018
- 2018-09-12 CN CN201821496101.2U patent/CN208916969U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078340A (en) * | 2019-06-03 | 2019-08-02 | 广州珠江电力有限公司 | A kind of desulfurization wastewater sludge recycling system and method |
| CN113248056A (en) * | 2021-06-28 | 2021-08-13 | 润电能源科学技术有限公司 | Desulfurization waste water gypsum sludge treatment system |
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