CN108862729A - A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization - Google Patents
A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization Download PDFInfo
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- CN108862729A CN108862729A CN201810781859.9A CN201810781859A CN108862729A CN 108862729 A CN108862729 A CN 108862729A CN 201810781859 A CN201810781859 A CN 201810781859A CN 108862729 A CN108862729 A CN 108862729A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C01F11/18—Carbonates
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of methods of chlor-alkali salt sludge sub-prime recycling comprehensive utilization, including reactive tank is added in the raw brine in former halogen tank, sodium hydroxide is added into raw brine and adjusts its pH value, then flocculant and load agent is added, mixed material after reaction is entered into subsider, and give clear liquid taking-up to qualified brine tank, bottom underflow material is sent to load agent recover.Beneficial effect is：The present invention realizes recycling for resource, reduces the pollution of environment, can significantly improve environmental benefit, the economy of resources of enterprise.
Description
Technical field
The invention belongs to chemical fields, and in particular to a kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization.
Background technique
Bittern purifying is the indispensable process in total Halogenated Caustic Production, its main component of the salt slurry of generation during bittern purifying
For solable matters such as the insoluble substances such as calcium carbonate, magnesium hydroxide, calcium sulfate and NaCl, Na2SO4, KCl.Although selection is not
With bittern purifying technique, ingredient contained in " salt slurry " is slightly different, but its main component is CaCO3 and Mg (OH) 2.At present
Most of the method for country's processing salt slurry is abandoned as waste material, is not only unfavorable for environmental protection in this way, is also resulted in the wave of resource
Take；Also Some Enterprises use desulfurizing agent is used as after salt-mud treatment, but the magnesium hydroxide economic value in salt slurry is higher, is used as
Desulfurizing agent is using unfortunately.
Summary of the invention
The object of the invention is that the comprehensive benefit of a kind of chlor-alkali salt sludge sub-prime recycling that provides to solve the above-mentioned problems
Method.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization, successively carries out in accordance with the following steps：
Step 1：Reactive tank is added in raw brine in former halogen tank, sodium hydroxide is added into raw brine and adjusts it
Then flocculant and load agent is added in pH value, the mixed material after reaction is entered subsider, and clear liquid taking-up is sent to qualification
Brine tank, bottom underflow material are sent to load agent recover；
Step 2：Underflow material after recycling load agent in step 1 is entered the first centrifuge to be separated by solid-liquid separation, will be divided
Liquid brine from after puts back to former halogen tank, and the slurry of solids after separation continues admittedly after washing water is added into the second centrifuge
Liquid separation, the liquid that the second centrifuge is isolated are sent into light salt brine tank, and the magnesium mud that residue washes away salinity is used as the life of other products
Produce raw material；
Step 3：Clear liquid in step 1 is added after sodium carbonate sufficiently reacts and enters membrane filter, by membrane filter
It is divided into clear liquid and slurry after filtering, filtered clear liquid is qualified refined brine；
Step 4：The slurry that membrane filter in step 3 separates is entered third centrifuge to be separated by solid-liquid separation, point
Liquid salt water bout lattice brine tank from after, the slurry of solids after separation continue after washing water is added into the 4th centrifuge
Be separated by solid-liquid separation, the 4th centrifuge separation after liquids recovery utilize, wash away salinity calcium mud add water it is with slurry after be used as desulfurizing agent and
Dehydration and drying production calcium carbonate uses.
In the present embodiment, the pH value in the step 1 is being 9~12.
Beneficial effect is：The present invention realizes recycling for resource, reduces the pollution of environment, can significantly improve enterprise
The environmental benefit of industry, economy of resources.
Specific embodiment
Specific steps of the invention are described further below by embodiment：
A kind of method volume embodiment of chlor-alkali salt sludge sub-prime recycling comprehensive utilization successively carries out in accordance with the following steps：
Step 1：Take the brine of former halogen tank that reactive tank 1 is added, adding 32% sodium hydroxide solution tune pH value is 12, is added and adds
Carrier and flocculant stir evenly, and mixed material enters subsider and carries out sedimentation separation, and supernatant is delivered to qualified brine tank, bottom
Portion's slurry is delivered to load agent recover；
Step 2：A kind of bottom slurry of step is entered the first centrifuge with 20m3/h speed to be separated by solid-liquid separation, is separated
Liquid out is sent into former halogen tank, and the solid mud isolated is sent into sink, and washing water 10m3/h, mixing are added in sink
Slurry afterwards enters the second centrifuge and is separated by solid-liquid separation, and the liquid that the second centrifuge is isolated is sent into light salt brine tank, isolates
Mud deallocation stock tank, magnesium mud is being formulated into required concentration with ingredient water is added in stock tank, the production as other products
Raw material；
Step 3：Clear liquid in step 1 qualification brine tank is sent to the second reactive tank, sodium carbonate liquor, sodium carbonate is added
Control is excessive：0.3~0.5g/l, sufficiently mixed material enters membrane filter after reaction, is blocked in solid particles such as this calcium carbonate
It cuts, output qualification refined brine and slurry, wherein slurry is calcium mud material；
Step 4：Calcium mud material enters third centrifuge with 20m3/h and is separated by solid-liquid separation in step 3, the liquid isolated
Body removes qualified brine tank, and the solid mud isolated removes the second sink, and washing water 20m3/h, slurry are added in the second sink
Material enters the 4th centrifuge and is separated by solid-liquid separation, and the liquid isolated removes light salt brine tank, and the mud deallocation stock tank isolated is being matched
Be added in stock tank ingredient water by calcium mud be formulated as the calcium mud material that specific gravity is 1.2 be delivered to power plant nearby used as desulfurizing agent or
Person dehydrates production calcium carbonate.
In above-described embodiment, refined brine index is after processing：NaCl content：305--315g/lCa2++Mg2+Content 7mg/
L, in the calcium mud material as desulfurizing agent：Calcium carbonate content is 80% (butt), chloride ion 0.2% (butt).
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and equivalents circle
It is fixed.
Claims (2)
1. a kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization, it is characterised in that：It successively carries out in accordance with the following steps：
Step 1：Reactive tank is added in raw brine in former halogen tank, sodium hydroxide is added into raw brine and adjusts its pH value,
Then flocculant and load agent is added, the mixed material after reaction is entered into subsider, and clear liquid taking-up is sent to qualified brine
Tank, bottom underflow material are sent to load agent recover；
Step 2：Underflow material after recycling load agent in step 1 is entered the first centrifuge to be separated by solid-liquid separation, after separation
Liquid brine put back to former halogen tank, slurry of solids after separation, which is added after washing water, to be entered the second centrifuge and continues solid-liquid point
From the liquid that the second centrifuge is isolated is sent into light salt brine tank, and the production that the magnesium mud that residue washes away salinity is used as other products is former
Material；
Step 3：Clear liquid in step 1 is added after sodium carbonate sufficiently reacts and enters membrane filter, is filtered by membrane filter
After be divided into clear liquid and slurry, filtered clear liquid is qualified refined brine；
Step 4：The slurry that membrane filter in step 3 separates is entered third centrifuge to be separated by solid-liquid separation, after separation
Liquid salt water bout lattice brine tank, slurry of solids after separation, which is added after washing water, to be entered the 4th centrifuge and continues solid-liquid
Separation, the liquids recovery after the separation of the 4th centrifuge utilize, and the calcium mud for washing away salinity adds water with slurry rear as desulfurizing agent and dehydration
Dry production calcium carbonate uses.
2. a kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization according to claim 1, it is characterised in that：The step
PH value in rapid one is being 9~12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810781859.9A CN108862729A (en) | 2018-07-17 | 2018-07-17 | A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810781859.9A CN108862729A (en) | 2018-07-17 | 2018-07-17 | A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization |
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| CN108862729A true CN108862729A (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810781859.9A Pending CN108862729A (en) | 2018-07-17 | 2018-07-17 | A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111204780A (en) * | 2020-01-09 | 2020-05-29 | 西安交通大学 | Resource utilization process of salt mud in chlor-alkali industry |
| CN112429896A (en) * | 2020-10-29 | 2021-03-02 | 河南佰利联新材料有限公司 | Treatment method of salt mud produced in chlor-alkali production |
| CN112456832A (en) * | 2020-12-09 | 2021-03-09 | 泰安燊豪化工有限公司 | Treatment method of salt mud containing high calcium sulfate |
| CN113461044A (en) * | 2021-07-28 | 2021-10-01 | 重庆天原化工有限公司 | Method for separating and recovering calcium and magnesium in chlor-alkali byproduct salt mud |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040250A (en) * | 2010-11-17 | 2011-05-04 | 辽宁工程技术大学 | Method for comprehensively utilizing chlor-alkali salt sludge |
| CN105129822A (en) * | 2015-08-03 | 2015-12-09 | 宜宾海丰和锐有限公司 | System and method for treating chlor-alkali production byproduct salt mud |
| CN105923822A (en) * | 2016-05-31 | 2016-09-07 | 江苏京源环保股份有限公司 | Mud and salt separation zero-discharge process of desulfurization wastewater |
| CN106396233A (en) * | 2016-11-22 | 2017-02-15 | 盛发环保科技（厦门）有限公司 | Device capable of realizing zero discharge of desulfurization wastewater |
-
2018
- 2018-07-17 CN CN201810781859.9A patent/CN108862729A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040250A (en) * | 2010-11-17 | 2011-05-04 | 辽宁工程技术大学 | Method for comprehensively utilizing chlor-alkali salt sludge |
| CN105129822A (en) * | 2015-08-03 | 2015-12-09 | 宜宾海丰和锐有限公司 | System and method for treating chlor-alkali production byproduct salt mud |
| CN105923822A (en) * | 2016-05-31 | 2016-09-07 | 江苏京源环保股份有限公司 | Mud and salt separation zero-discharge process of desulfurization wastewater |
| CN106396233A (en) * | 2016-11-22 | 2017-02-15 | 盛发环保科技（厦门）有限公司 | Device capable of realizing zero discharge of desulfurization wastewater |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111204780A (en) * | 2020-01-09 | 2020-05-29 | 西安交通大学 | Resource utilization process of salt mud in chlor-alkali industry |
| CN111204780B (en) * | 2020-01-09 | 2021-04-27 | 西安交通大学 | Resource utilization process of salt mud in chlor-alkali industry |
| CN112429896A (en) * | 2020-10-29 | 2021-03-02 | 河南佰利联新材料有限公司 | Treatment method of salt mud produced in chlor-alkali production |
| CN112429896B (en) * | 2020-10-29 | 2022-10-25 | 河南佰利联新材料有限公司 | Treatment method of salt mud produced in chlor-alkali production |
| CN112456832A (en) * | 2020-12-09 | 2021-03-09 | 泰安燊豪化工有限公司 | Treatment method of salt mud containing high calcium sulfate |
| CN113461044A (en) * | 2021-07-28 | 2021-10-01 | 重庆天原化工有限公司 | Method for separating and recovering calcium and magnesium in chlor-alkali byproduct salt mud |
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