CN107445343A - A kind of method of lime method processing magnesium sulfate waste water - Google Patents
A kind of method of lime method processing magnesium sulfate waste water Download PDFInfo
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- CN107445343A CN107445343A CN201710793110.1A CN201710793110A CN107445343A CN 107445343 A CN107445343 A CN 107445343A CN 201710793110 A CN201710793110 A CN 201710793110A CN 107445343 A CN107445343 A CN 107445343A
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- waste water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/529—Processes or devices for preparing lime water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The invention discloses a kind of method of lime method processing magnesium sulfate waste water, it is related to field of waste water treatment.Milk of lime is configured to defined concentration by the present invention, with magnesium sulfate waste water in certain conditioned response, the mixture of reacted calcium sulphate dihydrate and magnesium hydroxide is separated by hydrocyclone, so that magnesium hydroxide and calcium sulphate dihydrate are efficiently separated after two-stage separates, magnesium hydroxide returns to desulphurization system and continues desulfurization, calcium sulphate dihydrate is made calcium sulfate product by filtering drying and sold, whole processing technology need to only fill into a small amount of water, non-wastewater discharge, can thoroughly solve magnesium sulfate waste water caused by magnesium processes desulfurization and handle problem, the beneficial effects of the present invention are：This method solves the problems, such as that equipment scaling, the cycle of operation are long compared with the way of distillation, and equipment is simply invested small, more saves the energy；Compared with floatation, the technique will not add various organic adjuvants, and technique is more environmentally-friendly, and operating cost is lower.
Description
Technical field
The invention mainly relates to field of waste water treatment, specifically a kind of method of lime method processing magnesium sulfate waste water.
Background technology
Magnesium processes desulfurization is to be neutralized using magnesium compound (conventional is magnesia and magnesium hydroxide) in fire coal boiler fume
Sulfur dioxide, then by air oxidation, the method for forming Adlerika.There is this method desulfuration efficiency height, equipment to throw
Provide the advantages that small and be widely used.Mother liquor main component after desulfurization is magnesium sulfate, high-concentration sulfuric acid magnesium direct discharging of waste water
Soil and waters are influenceed very big；Bacterium in activated sludge can be killed again by being discharged into sewage disposal system.
The processing method to magnesium sulfate waste water main flow is the way of distillation at present, i.e., is steamed the moisture in desulfurization wastewater using heat energy
Hair falls, and finally obtains magnesium sulfate or Magnesium sulfate heptahydrate solid.Due to the calcium sulfate containing saturation in desulfurization wastewater, and calcium sulfate
Solubility reduced more than being raised with temperature after 60 DEG C.So part of sulfuric acid calcium solid is had in temperature-rise period is distilled
Separate out and be attached to heat transmission equipment surface, can so have a strong impact on equipment thermal efficiency, have in production because often cleaning is set
It is standby and cause device to stop.
In recent years, the domestic Beneficial for starting to occur chemically to handle desulfurization wastewater.Patent
Liu CN201110226023.0 Bao Shu etc. reacts magnesium sulfate and milk of lime under certain condition, generates magnesium hydroxide and calcium sulfate
Mixed precipitation, pH value is adjusted to mixture, add inhibitor and collecting agent carries out flotation, by the magnesium hydroxide and sulphur after FLOTATION SEPARATION
Sour calcium is filtered, dried.This processing disadvantages are process complexity, operation requirement height, and organic inhibitor and collecting agent
Using will also result in pollution to environment.
The content of the invention
To solve the deficiencies in the prior art, the invention provides a kind of method of lime method processing magnesium sulfate waste water, it can
It is thorough to solve the problem of magnesium sulfate waste water handles problem caused by magnesium processes desulfurization, in the absence of fouling and the long cycle of operation, and more
Add environmental protection, cost is lower.
The present invention to achieve the above object, is achieved through the following technical solutions：
A kind of method of lime method processing magnesium sulfate waste water, its step are as follows：
Step 1：By quick lime ashing melting machine digestion process, the milk of lime that concentration is 5-15% is obtained；
Step 2：By the magnesium sulfate waste water in desulphurization system according to 1-25m3/ h flow is added in reactor, control
Reaction temperature processed is 20-80 DEG C, then adds in step 1 milk of lime made and is reacted, is obtained containing magnesium hydroxide and two
Slurry of the H 2 O calcium sulphate pH value in 9-11.5；
Step 3：The slurry that completion is reacted in step 2 is put into equipment caching or is pumped directly into hydrocyclone and is divided
From the Stress control 0.12-0.35MPa of hydrocyclone import, the ratio that overfall and underflow opening discharge is arranged according to volume flow
Control as 5-10:1, because magnesium hydroxide caused by reaction and calcium sulphate dihydrate specific gravity difference are larger, most of magnesium hydroxide from
Hydrocyclone overfall comes out, and enters first separation overflowing liquid storage tank, and most of calcium sulphate dihydrate is from hydrocyclone bottom
Head piece out enters the storage of first separation underflow liquid storage tank；
Step 4：The slurry for entering first separation overflowing liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
The ratio of the Stress control 0.12-0.35MPa of hydrocyclone import, overfall and underflow opening discharging arranges to be controlled according to volume flow
For 7-15:1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, is come out from underflow opening
Calcium sulphate dihydrate slurry enter secondary separation underflow liquid storage tank storage；
Step 5：The slurry for entering first separation underflow liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
The ratio of the Stress control 0.12-0.35MPa of hydrocyclone import, overfall and underflow opening discharging arranges to be controlled according to volume flow
For 2-5:1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, is come out from underflow opening
Calcium sulphate dihydrate slurry enters the storage of secondary separation underflow liquid storage tank；
Step 6：Magnesium hydroxide slurry in secondary separation overflowing liquid storage tank is pumped into desulphurization system again to use, secondary point
From the calcium sulphate dihydrate slurry in underflow liquid storage tank calcium sulfate product is obtained by filtration drying；
Step 7：Mother liquor after being filtered in step 6 is collected, used as assimilation of quicklime.
Prior art is contrasted, the beneficial effects of the invention are as follows：
Milk of lime is configured to defined concentration by the present invention, and magnesium sulfate waste water is in certain conditioned response, reacted
The mixture of calcium sulphate dihydrate and magnesium hydroxide is separated by hydrocyclone, and magnesium hydroxide is caused after two-stage separates
Efficiently separated with calcium sulphate dihydrate, magnesium hydroxide returns to desulphurization system and continues desulfurization, and calcium sulphate dihydrate passes through filtering drying
Calcium sulfate product sale is made, whole processing technology need to only fill into a small amount of water, a non-wastewater discharge, you can thoroughly solve magnesium processes
Caused by desulfurization magnesium sulfate waste water handle problem, this method compared with the way of distillation, solve equipment scaling, the cycle of operation length ask
Topic, and equipment is simply invested small, more saves the energy；Compared with floatation, the technique will not add various organic adjuvants, work
Skill is more environmentally-friendly, and operating cost is lower.
Brief description of the drawings
Accompanying drawing 1 is the process chart of lime method processing magnesium sulfate waste water of the present invention；
Accompanying drawing 2 is the installation drawing of lime method processing magnesium sulfate waste water of the present invention.
Label shown in accompanying drawing：1st, desulphurization system；2nd, ashing melting machine；3rd, hydrocyclone；4th, drying system；G, reactor；
P, first separation overflowing liquid storage tank；Q, first separation underflow liquid storage tank；R, secondary separation overflowing liquid storage tank；S, secondary separation underflow
Liquid storage tank.
Embodiment
With reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, this area
Technical staff can make various changes or modifications to the present invention, and these equivalent form of values equally fall within scope defined herein.
Embodiment 1
A kind of method of lime method processing magnesium sulfate waste water, its step are as follows：
Step 1：By quick lime ashing melting machine digestion process, milk of lime is obtained；
Step 2：By the magnesium sulfate waste water of the containing magnesium sulfate content 11.2% in boiler flue gas desulfurization system according to 1m3/h
Flow be added in reactor, controlling reaction temperature is 20 DEG C, then adds in step 1 milk of lime of 5% content made
Reacted, obtained containing the slurry of magnesium hydroxide and calcium sulphate dihydrate pH value 9；
Step 3：The slurry that completion is reacted in step 2 is put into equipment caching or is pumped directly into hydrocyclone and is divided
From the Stress control 0.12MPa of hydrocyclone import, the ratio that overfall and underflow opening discharge arranges is according to volume flow control
5:1, most of magnesium hydroxide comes out from hydrocyclone overfall, enters first separation overflowing liquid storage tank, most of two water
Calcium sulfate out enters the storage of first separation underflow liquid storage tank from hydrocyclone underflow opening；
Step 4：The slurry for entering first separation overflowing liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
It is 5 that the ratio of the Stress control 0.12MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,:
1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, the two water sulphur come out from underflow opening
Sour calcium slurry enters the storage of secondary separation underflow liquid storage tank；
Step 5：The slurry for entering first separation underflow liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
It is 2 that the ratio of the Stress control 0.12MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,:
1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, the two water sulphur come out from underflow opening
Sour calcium slurry enters the storage of secondary separation underflow liquid storage tank；
Step 6：Magnesium hydroxide slurry in secondary separation overflowing liquid storage tank is pumped into desulphurization system again to use, secondary point
It is filtered from the calcium sulphate dihydrate slurry in underflow liquid storage tank, 150 DEG C dry 4 hours, analyze calcium sulphate content 93.2%；
Step 7：Mother liquor after being filtered in step 6 is collected, used as assimilation of quicklime.
Embodiment 2
A kind of method of lime method processing magnesium sulfate waste water, its step are as follows：
Step 1：By quick lime ashing melting machine digestion process, the milk of lime that concentration is 15% is obtained；
Step 2：By the magnesium sulfate waste water of the containing magnesium sulfate content 13.6% in boiler flue gas desulfurization system according to 25m3/
H flow is added in reactor, and controlling reaction temperature is 80 DEG C, is then added in step 1 milk of lime made and is reacted,
Obtain containing the slurry of magnesium hydroxide and calcium sulphate dihydrate pH value 11.5；
Step 3：The slurry that completion is reacted in step 2 is put into equipment caching or is pumped directly into hydrocyclone and is divided
From the Stress control 0.35MPa of hydrocyclone import, the ratio that overfall and underflow opening discharge arranges is according to volume flow control
10:1, most of magnesium hydroxide comes out from hydrocyclone overfall, enters first separation overflowing liquid storage tank, most of two water
Calcium sulfate out enters the storage of first separation underflow liquid storage tank from hydrocyclone underflow opening；
Step 4：The slurry for entering first separation overflowing liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
It is 15 that the ratio of the Stress control 0.35MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,:
1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, the two water sulphur come out from underflow opening
Sour calcium slurry enters the storage of secondary separation underflow liquid storage tank；
Step 5：The slurry for entering first separation underflow liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
It is 5 that the ratio of the Stress control 0.35MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,:
1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, the two water sulphur come out from underflow opening
Sour calcium slurry enters the storage of secondary separation underflow liquid storage tank；
Step 6：Magnesium hydroxide slurry in secondary separation overflowing liquid storage tank is pumped into desulphurization system again to use, secondary point
It is filtered from the calcium sulphate dihydrate slurry in underflow liquid storage tank, 150 DEG C dry 4 hours, analyze calcium sulphate content 94.6%；
Step 7：Mother liquor after being filtered in step 6 is collected, used as assimilation of quicklime.
Embodiment 3
A kind of method of lime method processing magnesium sulfate waste water, its step are as follows：
Step 1：By quick lime ashing melting machine digestion process, milk of lime is obtained；
Step 2：By the magnesium sulfate waste water of the containing magnesium sulfate content 12.5% in boiler flue gas desulfurization system according to 3m3/h
Flow be added in reactor, controlling reaction temperature is 40 DEG C, then adds in step 1 milk of lime of 10% content made
Reacted, obtained containing the slurry of magnesium hydroxide and calcium sulphate dihydrate pH value 9.5；
Step 3：The slurry that completion is reacted in step 2 is put into equipment caching or is pumped directly into hydrocyclone and is divided
From the Stress control 0.25MPa of hydrocyclone import, the ratio that overfall and underflow opening discharge arranges is according to volume flow control
7:1, most of magnesium hydroxide comes out from hydrocyclone overfall, enters first separation overflowing liquid storage tank, most of two water
Calcium sulfate out enters the storage of first separation underflow liquid storage tank from hydrocyclone underflow opening；
Step 4：The slurry for entering first separation overflowing liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
It is 11 that the ratio of the Stress control 0.25MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,:
1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, the two water sulphur come out from underflow opening
Sour calcium slurry enters the storage of secondary separation underflow liquid storage tank；
Step 5：The slurry for entering first separation underflow liquid storage tank in step 3 is pumped into hydrocyclone to be separated,
It is 3 that the ratio of the Stress control 0.25MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,:
1, the magnesium hydroxide slurry come out from overfall enters the storage of secondary separation overflowing liquid storage tank, the two water sulphur come out from underflow opening
Sour calcium slurry enters the storage of secondary separation underflow liquid storage tank；
Step 6：Magnesium hydroxide slurry in secondary separation overflowing liquid storage tank is pumped into desulphurization system again to use, secondary point
It is filtered from the calcium sulphate dihydrate slurry in underflow liquid storage tank, 150 DEG C dry 4 hours, analyze calcium sulphate content 95.4%；
Step 7：Mother liquor after being filtered in step 6 is collected, used as assimilation of quicklime.
Claims (9)
- A kind of 1. method of lime method processing magnesium sulfate waste water, it is characterised in that：Its step is as follows：Step 1：By quick lime ashing melting machine digestion process, milk of lime is obtained；Step 2：Magnesium sulfate waste water in desulphurization system will be come to be added in reactor, then add in step 1 lime made Breast is reacted, and obtains the slurry containing magnesium hydroxide and calcium sulphate dihydrate；Step 3：The slurry that completion is reacted in step 2 is put into equipment caching or is pumped directly into hydrocyclone and is separated, So that most of magnesium hydroxide out enters the storage of first separation overflowing liquid storage tank, major part two from hydrocyclone overfall H 2 O calcium sulphate out enters the storage of first separation underflow liquid storage tank from hydrocyclone underflow opening；Step 4：The slurry for entering first separation overflowing liquid storage tank in step 3 is pumped into hydrocyclone to be separated, from overflow The magnesium hydroxide slurry that head piece comes out enters the storage of secondary separation overflowing liquid storage tank, the calcium sulphate dihydrate slurry come out from underflow opening Material enters the storage of secondary separation underflow liquid storage tank；Step 5：The slurry for entering first separation underflow liquid storage tank in step 3 is pumped into hydrocyclone to be separated, from overflow The magnesium hydroxide slurry that head piece comes out enters the storage of secondary separation overflowing liquid storage tank, the calcium sulphate dihydrate slurry come out from underflow opening Material enters the storage of secondary separation underflow liquid storage tank；Step 6：Magnesium hydroxide slurry in secondary separation overflowing liquid storage tank is pumped into desulphurization system again to use, secondary separation bottom Calcium sulphate dihydrate slurry in flow liquid storage tank obtains calcium sulfate product by filtration drying；Step 7：Mother liquor after being filtered in step 6 is collected, used as assimilation of quicklime.
- A kind of 2. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The milk of lime Concentration control in 5-15%.
- A kind of 3. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The magnesium sulfate Waste water is according to 1-25m3/ h flow is added in reactor, and controlling reaction temperature is 20-80 DEG C.
- A kind of 4. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The step 2 In to obtain the pH value containing magnesium hydroxide and calcium sulphate dihydrate slurry be 9-11.5.
- A kind of 5. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The step 3 The ratio of the Stress control 0.12-0.35MPa of middle waterpower cyclone inlets, overfall and underflow opening discharging is arranged according to volume flow control It is made as 5-10:1.
- A kind of 6. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The step 4 The ratio of the Stress control 0.12-0.35MPa of middle waterpower cyclone inlets, overfall and underflow opening discharging is arranged according to volume flow control It is made as 7-15:1.
- A kind of 7. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The step 5 The ratio of the Stress control 0.12-0.35MPa of middle waterpower cyclone inlets, overfall and underflow opening discharging is arranged according to volume flow control It is made as 2-5:1.
- A kind of 8. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：The step 5 In calcium sulphate dihydrate slurry obtain calcium sulfate product within 4 hours by filtering, 150 DEG C of drying.
- A kind of 9. method of lime method processing magnesium sulfate waste water according to claim 1, it is characterised in that：Its step is such as Under：Step 1：By quick lime ashing melting machine digestion process, the milk of lime that concentration is 10% is obtained；Step 2：By magnesium sulfate waste water according to 3m3/ h flow is added in reactor, and controlling reaction temperature is 40 DEG C, Ran Houjia Enter the milk of lime made in step 1 to be reacted, obtain containing the slurry of magnesium hydroxide and calcium sulphate dihydrate pH value 9.5；Step 3：The slurry that completion is reacted in step 2 is put into equipment caching or is pumped directly into hydrocyclone and is separated, It is 7 that the ratio of the Stress control 0.25MPa of hydrocyclone import, overfall and underflow opening discharging, which is arranged according to volume flow control,: 1, most of magnesium hydroxide comes out from hydrocyclone overfall, enters first separation overflowing liquid storage tank, most of two water sulphur Sour calcium out enters the storage of first separation underflow liquid storage tank from hydrocyclone underflow opening；Step 4：The slurry for entering first separation overflowing liquid storage tank in step 3 is pumped into hydrocyclone to be separated, waterpower It is 11 that the ratio of the Stress control 0.25MPa of cyclone inlets, overfall and underflow opening discharging, which is arranged according to volume flow control,:1, from The magnesium hydroxide slurry that overfall comes out enters the storage of secondary separation overflowing liquid storage tank, the calcium sulphate dihydrate come out from underflow opening Slurry enters the storage of secondary separation underflow liquid storage tank；Step 5：The slurry for entering first separation underflow liquid storage tank in step 3 is pumped into hydrocyclone to be separated, waterpower It is 3 that the ratio of the Stress control 0.25MPa of cyclone inlets, overfall and underflow opening discharging, which is arranged according to volume flow control,:1, from The magnesium hydroxide slurry that overfall comes out enters the storage of secondary separation overflowing liquid storage tank, the calcium sulphate dihydrate come out from underflow opening Slurry enters the storage of secondary separation underflow liquid storage tank；Step 6：Magnesium hydroxide slurry in secondary separation overflowing liquid storage tank is pumped into desulphurization system again to use, secondary separation bottom Calcium sulphate dihydrate slurry in flow liquid storage tank obtains calcium sulfate product by filtration drying；Step 7：Mother liquor after being filtered in step 6 is collected, used as assimilation of quicklime.
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| CN201710793110.1A CN107445343A (en) | 2017-09-06 | 2017-09-06 | A kind of method of lime method processing magnesium sulfate waste water |
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| CN201710793110.1A CN107445343A (en) | 2017-09-06 | 2017-09-06 | A kind of method of lime method processing magnesium sulfate waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706622A (en) * | 2018-05-24 | 2018-10-26 | 桐乡市思远环保科技有限公司 | A kind of alkali circulation regeneration method |
| CN108793439A (en) * | 2018-08-29 | 2018-11-13 | 郑州恒博环境科技股份有限公司 | A kind of knockout tower of desulfurization wastewater recycling magnesium hydroxide |
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| CN105567888A (en) * | 2015-12-23 | 2016-05-11 | 北京科技大学 | Method for recovering fine iron powder from ferrous metallurgy iron-contained dust by using hydraulic cyclone separation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706622A (en) * | 2018-05-24 | 2018-10-26 | 桐乡市思远环保科技有限公司 | A kind of alkali circulation regeneration method |
| CN108793439A (en) * | 2018-08-29 | 2018-11-13 | 郑州恒博环境科技股份有限公司 | A kind of knockout tower of desulfurization wastewater recycling magnesium hydroxide |
| CN108793439B (en) * | 2018-08-29 | 2024-02-27 | 郑州恒博环境科技股份有限公司 | Separation tower for recycling magnesium hydroxide from desulfurization wastewater |
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Application publication date: 20171208 |
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