CN206298479U - Limestone/gypsum method desulfurization wastewater zero discharge treatment equipment - Google Patents
Limestone/gypsum method desulfurization wastewater zero discharge treatment equipment Download PDFInfo
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- CN206298479U CN206298479U CN201621454365.2U CN201621454365U CN206298479U CN 206298479 U CN206298479 U CN 206298479U CN 201621454365 U CN201621454365 U CN 201621454365U CN 206298479 U CN206298479 U CN 206298479U
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- desulfurization wastewater
- gypsum method
- method desulfurization
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Abstract
The utility model discloses a kind of limestone/gypsum method desulfurization wastewater zero discharge treatment equipment, equipment includes：Low-temperature concentration device, precipitated crystal filter, agitator, magnesium sulfate crystallizer and pumped vacuum systems.Its application method is comprised the following steps：Limestone/gypsum method desulfurization wastewater is concentrated under cryogenic, and the calcium sulfate in concentration process in waste water is removed with crystal form；Decrease temperature crystalline is evaporated to having removed the concentrate after calcium sulphate crystal, magnesium sulfate crystals and remaining mother liquor is obtained, remaining mother liquor removes heavy metal, then obtains salt-mixture through evaporative crystallization.The utility model combines precipitated crystal deliming technique using low temperature concentration, without excessive chemical agent, easy selection.Enrichment facility and precipitated crystal simple structure, the calcium sulfate in waste water are removed with crystal form, and anti-equipment corrosion and good antiscale property effect are good.Technical process produces magnesium sulfate, avoids during prior art concentration technology due to the high cost for needing zone of transformation, costly problem.
Description
Technical field
The utility model belongs to limestone/gypsum method desulfurization wastewater processing technology field, and more particularly to a kind of lime stone/
Gypsum desulfurization wastewater zero discharge treatment equipment, realizes salt constituents recycling in desulfurization wastewater.
Background technology
High-salt wastewater treatment is the wastewater treatment problem of industry-by-industry, from the wastewater zero discharge project for having put into operation both at home and abroad
See, softening+concentration+evaporative crystallization is wastewater zero discharge prevailing technology, be in development more other technologies.Limestone/gypsum
Method desulfurization wastewater is typical high-salt wastewater, and Main Anions are：Sulfate radical, chlorion and fluorine ion, cation is：Calcium from
Son, magnesium ion, sodium ion, potassium ion and part heavy metal ion.
During conventional limestone/gypsum desulfurization wastewater treatment, calcium hydroxide is added to adjust PH using in three headers first
To 9 or so, in calcium hydroxide adition process, a large amount of magnesium ions in desulfurization wastewater are combined generation hydroxide with hydroxide ion
Magnesium precipitate turns into solid waste with sludge form discharge, while the sulfate radical in desulfurization wastewater generates calcium sulfate with calcium binding
Precipitation also turns into solid waste with sludge form discharge；In follow-up wastewater zero discharge processing procedure, being used concentration process more
Film is concentrated, very high to waste water hardness requirement, and the magnesium ion of excessive calcium ion and remnants need to add sodium carbonate to give birth in system
Removed into magnesium carbonate and calcium carbonate, dosing cost is very high, the quantity of solid waste of generation is also very big, useful sulfuric acid in waste water
Magnesium cannot be recycled.
Magnesium in limestone/gypsum method desulfurization wastewater typically contains 1.5% from lime stone used in lime stone
(Wt) magnesia of left and right, due to the ready dissolution of magnesium sulfate, the magnesium-based sheet in lime stone is appeared in de- in the form of magnesium sulfate
In sulphur waste water.According to before processing desulfurization wastewater composition analysis investigation result, magnesium ion contains in limestone/gypsum method desulfurization wastewater
Measure the power plant more than 10000mg/L and account for about 30%, the power plant more than 5000mg/L accounts for about 70%, and exploitation is extracted at the new waste water of magnesium sulfate
Science and engineering skill has certain environment protection significance and economic worth.
Utility model content
The purpose of this utility model is to provide a kind of limestone/gypsum method desulfurization wastewater zero discharge treatment equipment, to solve
The problem that chemical feeding quantity is big during limestone/gypsum method desulfurization wastewater zero-emission and magnesium sulfate cannot be recycled.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of limestone/gypsum method desulfurization wastewater zero
Emission treatment equipment, it includes：Low-temperature concentration device, precipitated crystal filter, agitator, magnesium sulfate crystallizer and vacuumize and be
System；
The inlet of the Low-temperature concentration device is connected with limestone/gypsum method desulfurization wastewater feed pipe；The precipitation knot
The inlet of brilliant filter is connected with the liquid outlet of Low-temperature concentration device；Calcium sulfate crystal seed is placed with precipitated crystal filter；Institute
Agitator is stated to be arranged in precipitated crystal filter；The inlet of the magnesium sulfate crystallizer goes out liquid with precipitated crystal filter
Mouth connection；The pumped vacuum systems is used to vacuumize the magnesium sulfate crystallizer.
The utility model limestone/gypsum method desulfurization wastewater zero discharge treatment equipment as described above, further, precipitation knot
The liquid outlet of brilliant filter is also by the inlet of pipeline connection Low-temperature concentration device.
The utility model limestone/gypsum method desulfurization wastewater zero discharge treatment equipment as described above, further, low temperature is dense
Multiple board-like mass-and heat-transfer devices are provided with compression apparatus, board-like mass-and heat-transfer device includes base plate and the sieve tray being obliquely installed；
One side of the sieve tray is connected with base plate.
The utility model limestone/gypsum method desulfurization wastewater zero discharge treatment equipment as described above is further, adjacent
Interval setting between board-like mass-and heat-transfer device, board-like mass-and heat-transfer device is detachably arranged in low temperature and concentrates by support member
In device.
The utility model limestone/gypsum method desulfurization wastewater zero discharge treatment equipment as described above, further, sieve tray
Gradient be 15 degree~60 degree, the percent opening of sieve tray is 10%~30%, and perforate is elliptical aperture or circular hole, it is preferred that perforate
Length and width in the range of 10mmx30mm.
The beneficial effects of the utility model are：
1st, precipitated crystal deliming technique is combined using low temperature concentration, without excessive chemical agent, easy selection.
2nd, enrichment facility and precipitated crystal filtration device structure are simple, and the calcium sulfate in waste water is removed with crystal form, prevent
Equipment corrosion and good antiscale property effect are good.
3rd, technical process production magnesium sulfate, avoids prior art concentration technology（As reverse osmosis concentration, electrodialysis are concentrated
Deng）During due to the high cost for needing zone of transformation, costly problem.
4th, reduce the solid waste discharge capacity of process, magnesium sulfate is utilized effectively in waste water, invest low, energy consumption it is low,
Operating cost is low.
Brief description of the drawings
Fig. 1 is limestone/gypsum method desulfurization wastewater zero discharge treatment equipment schematic diagram；
Fig. 2 is a kind of individual board-like mass-and heat-transfer schematic device of embodiment of the utility model；
Fig. 3 is the schematic top plan view of Fig. 2.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, Low-temperature concentration device, 2, precipitated crystal filter, 3, agitator, 4, pipeline, 5, magnesium sulfate crystallizer, 6, take out true
Empty set is united, and 7, calcium sulfate crystal seed, 8, board-like mass-and heat-transfer device, 81, sieve tray, 82, base plate, 83, sieve aperture, 9, feed pipe.
Specific embodiment
The embodiment recorded herein is specific specific embodiment of the present utility model, of the present utility model for illustrating
Design, is explanatory and exemplary, should not be construed as the limit to the utility model implementation method and the utility model scope
System.Except the implementation exception recorded herein, those skilled in the art can also be public based on the application claims and specification institute
The content opened includes doing using the embodiment to recording herein using obvious other technical schemes, these technical schemes
Go out the technical scheme of any obvious substitutions and modifications.
Fig. 1 shows a kind of limestone/gypsum method desulfurization wastewater zero discharge treatment equipment of embodiment of the utility model, its bag
Include：Low-temperature concentration device 1, precipitated crystal filter 2, agitator 3, magnesium sulfate crystallizer 5 and pumped vacuum systems 6；
The inlet of the Low-temperature concentration device is connected with limestone/gypsum method desulfurization wastewater feed pipe 9；The precipitation knot
The inlet of brilliant filter is connected with the liquid outlet of Low-temperature concentration device；Calcium sulfate crystal seed 7 is placed with precipitated crystal filter 2；
The agitator 3 is arranged in precipitated crystal filter 2；The inlet of the magnesium sulfate crystallizer and precipitated crystal filter
Liquid outlet is connected；The pumped vacuum systems 6 is used to vacuumize the magnesium sulfate crystallizer 5.
In the embodiment illustrated in figure 1, the liquid outlet of precipitated crystal filter also connects low temperature and concentrates dress by pipeline 4
The inlet put.In precipitated crystal filter removal calcium sulfate after filtrate Low-temperature concentration device inlet with it is fresh enter
The concentration under cryogenic conditions is re-started after material mixing.
In a preferred embodiment, multiple board-like mass-and heat-transfer devices 8 are provided with Low-temperature concentration device, such as Fig. 2 and Fig. 3 institutes
Show, board-like mass-and heat-transfer device 8 includes base plate 82 and the sieve tray 81 being obliquely installed（It is provided with sieve aperture 83）；The sieve tray 81
While being connected with base plate 82.
In a preferred embodiment, interval setting, board-like mass-and heat-transfer device between adjacent board-like mass-and heat-transfer device 8
8 are detachably arranged in Low-temperature concentration device 1 by support member.
In a preferred embodiment, the gradient of sieve tray is 10 degree~60 degree, and the percent opening of sieve tray is 10%~30%,
Perforate is elliptical aperture or circular hole in the range of 10mmx30mm.
Limestone/gypsum method desulfurization wastewater is carried out using above-mentioned limestone/gypsum method desulfurization wastewater zero discharge treatment equipment
Zero discharge treatment method, comprises the following steps：
Limestone/gypsum method desulfurization wastewater is concentrated under cryogenic, and the calcium sulfate in concentration process in waste water is with crystal
Form is removed；Concentration process uses directly contact mass-and heat-transfer process to limestone/gypsum method desulfurization wastewater under cryogenic.
The signified temperature range of cryogenic conditions is 60 DEG C~90 DEG C.Calcium sulfate in concentration process in waste water is with crystal form
The detailed process being removed is carried out in precipitated crystal filter, there is the calcium sulfate crystal seed being placed in advance in precipitated crystal device, is given up
Water mixes in precipitated crystal device with calcium sulfate crystal seed makes calcium sulphate crystal grow up, and calcium sulphate crystal is filtered is trapped in precipitation knot
In brilliant device, filtrate re-starts the process concentrated under cryogenic conditions after mixing with limestone/gypsum method desulfurization wastewater.Preferred
In embodiment, the diameter range of the calcium sulfate crystal seed is at 80 microns~100 microns.In a preferred embodiment, waste water is heavy
Sedimentation time in the crystallizer of shallow lake is 20min~35min, and waste water is stirred in infall process, and mixing time is 10min
~20min.
Cooling evaporative crystallization is carried out to having removed the concentrate after calcium sulphate crystal, magnesium sulfate crystals is obtained and residue is female
Liquid；Remaining mother liquor removes heavy metal, then obtains salt-mixture through evaporative crystallization.
A kind of embodiment of above-mentioned specific embodiment is：Calcium ion contains in certain power plant's limestone/gypsum method desulfurization wastewater
It is 1000mg/L to measure, and magnesium ion content is 12000mg/L, and sodium ion is 1200mg/L, and sulfate radical is 25000mg/L, chlorion
It is 20000mg/L, pH value 6.3 enters Low-temperature concentration device after precipitation and filtering, is concentrated in Low-temperature concentration device close
Saturated mode, Low-temperature concentration device circular route is provided with precipitated crystal filter, there is the calcium sulfate being placed in advance in precipitated crystal device
Crystal seed, saturated mode solution mixes in precipitated crystal device with crystal seed, crystal is grown up, and crystal is filtered is trapped in precipitated crystal device
In, filtrate returns to enrichment facility after mixing with fresh feed.Precipitated crystal filter is provided with agitator, in constantly concentration and crystallization
In filter process, the calcium sulfate in solution is removed.The saturated concentration that solution is concentrated to crystalline sulfuric acid magnesium in enrichment facility is
When, magnesium sulfate crystallizer is admitted to, magnesium sulfate crystallizer is furnished with pumped vacuum systems, is further concentrated after lowering the temperature through vacuum flashing
And then obtain magnesium sulfate crystals.
Each technical characteristic of above-mentioned disclosure is not limited to disclosed and further feature combination, and those skilled in the art are also
Other combinations between each technical characteristic can be carried out according to the purpose of utility model, is defined by the purpose for realizing the utility model.
Claims (5)
1. a kind of limestone/gypsum method desulfurization wastewater zero discharge treatment equipment, it is characterised in that including：It is Low-temperature concentration device, heavy
Shallow lake crystal filter, agitator, magnesium sulfate crystallizer and pumped vacuum systems；
The inlet of the Low-temperature concentration device is connected with limestone/gypsum method desulfurization wastewater feed pipe；The precipitated crystal mistake
The inlet of filter is connected with the liquid outlet of Low-temperature concentration device；Calcium sulfate crystal seed is placed with precipitated crystal filter；It is described to stir
Device is mixed to be arranged in precipitated crystal filter；The inlet of the magnesium sulfate crystallizer connects with the liquid outlet of precipitated crystal filter
It is logical；The pumped vacuum systems is used to vacuumize the magnesium sulfate crystallizer.
2. limestone/gypsum method desulfurization wastewater zero discharge treatment equipment according to claim 1, it is characterised in that precipitation
The liquid outlet of crystal filter is also by the inlet of pipeline connection Low-temperature concentration device.
3. limestone/gypsum method desulfurization wastewater zero discharge treatment equipment according to claim 1 and 2, it is characterised in that low
Multiple board-like mass-and heat-transfer devices are provided with warm enrichment facility, board-like mass-and heat-transfer device includes base plate and the sieve aperture being obliquely installed
Plate；One side of the sieve tray is connected with base plate.
4. limestone/gypsum method desulfurization wastewater zero discharge treatment equipment according to claim 3, it is characterised in that adjacent
Board-like mass-and heat-transfer device between interval setting, it is dense that board-like mass-and heat-transfer device is detachably arranged in low temperature by support member
In compression apparatus.
5. limestone/gypsum method desulfurization wastewater zero discharge treatment equipment according to claim 3, it is characterised in that sieve aperture
The gradient of plate is 15 degree~60 degree, and the percent opening of sieve tray is 10%~30%, and perforate is elliptical aperture or circular hole, the length and width of perforate
In the range of 10mmx30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621454365.2U CN206298479U (en) | 2016-12-28 | 2016-12-28 | Limestone/gypsum method desulfurization wastewater zero discharge treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621454365.2U CN206298479U (en) | 2016-12-28 | 2016-12-28 | Limestone/gypsum method desulfurization wastewater zero discharge treatment equipment |
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| CN206298479U true CN206298479U (en) | 2017-07-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517629A (en) * | 2016-12-28 | 2017-03-22 | 北京国电龙源环保工程有限公司 | Limestone/gypsum desulfurization wastewater zero-discharge treatment equipment and limestone/gypsum desulfurization wastewater zero-discharge treatment method |
-
2016
- 2016-12-28 CN CN201621454365.2U patent/CN206298479U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517629A (en) * | 2016-12-28 | 2017-03-22 | 北京国电龙源环保工程有限公司 | Limestone/gypsum desulfurization wastewater zero-discharge treatment equipment and limestone/gypsum desulfurization wastewater zero-discharge treatment method |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |
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