CN112979034A - Deep refining method for salt water by resource utilization of waste salt - Google Patents
Deep refining method for salt water by resource utilization of waste salt Download PDFInfo
- Publication number
- CN112979034A CN112979034A CN202110253289.8A CN202110253289A CN112979034A CN 112979034 A CN112979034 A CN 112979034A CN 202110253289 A CN202110253289 A CN 202110253289A CN 112979034 A CN112979034 A CN 112979034A
- Authority
- CN
- China
- Prior art keywords
- salt
- brine
- effluent
- water
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/08—Preparation by working up natural or industrial salt mixtures or siliceous minerals
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/22—Preparation in the form of granules, pieces, or other shaped products
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/004—Preparation in the form of granules, pieces or other shaped products
-
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
-
- 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
- C02F1/60—Silicon compounds
-
- 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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/06—Softening water by precipitation of the hardness using calcium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a deep refining method of brine by resource utilization of waste salt, which comprises the following steps: the first step is as follows: conveying the waste salt into a salt dissolving barrel, adding water, stirring and dissolving to obtain crude salt water; the second step is that: and (3) putting the crude brine in the first step into a silicon and hardness removing system, adding a chemical agent, wherein the effluent of the silicon and hardness removing system contains part of ash, incompletely settled calcium salt and magnesium salt small particles. According to the method, the incinerated waste salt is subjected to desilicication, hardness removal, advanced oxidation, resin adsorption and other treatment, the obtained brine effluent can be subjected to evaporation treatment, the condensate can be recycled in a crude salt dissolving working section, the evaporated crystal salt is a product, the whole set of advanced treatment process ensures the product quality of the evaporated crystal salt, the reasonable recycling of the waste salt is realized, the environmental pressure is relieved, and the method has good economic value.
Description
Technical Field
The invention relates to a method for deeply refining brine by recycling waste salt.
Background
The waste salt is mainly generated in the treatment process of high-salinity wastewater. Researchers have developed various methods for treating high-salinity wastewater, such as: the method solves the problem that various high-salt and high-organic wastewater is difficult to treat by an electrolysis method, a membrane separation method, a biological treatment method, an evaporative crystallization method and the like, wherein the evaporative crystallization is a technology commonly adopted in a wastewater terminal treatment process. Although the water resource can be treated and recycled to achieve zero emission, the method does not remove the pollutants, but only transfers the pollutants into the crystallized miscellaneous salt, and the waste salt generated after treatment is the treatment difficulty. Especially in petroleum industry, coal chemical industry, medicine, printing and dyeing and other industries, the residue after the high-salt wastewater treatment contains various toxic and harmful organic matters and inorganic salts such as sodium chloride, sodium sulfate and the like.
The existing tail end treatment technology of waste salt mainly comprises landfill, incineration and harmless comprehensive utilization. The landfill is to carry out sanitary landfill disposal by curing waste salt through concrete and the like and then sending the waste salt into a rigid landfill site according to landfill technical specifications, or landfill disposal or sea disposal after harmless treatment of the waste salt through proper pretreatment technology. Landfills are not truly harmless and require large amounts of land resources. The production amount of waste salt is very large, most of the waste salt is dangerous waste which needs special landfill disposal, and the landfill disposal capability of the waste salt is seriously insufficient at present. The sea disposal is limited by geographical location, the environmental risk is high, and there is a certain influence on the ecology. The incineration is that the waste salt is heated to 900 ℃, the inorganic salt is melted and flows into the furnace bottom, and the inorganic salt is recovered after cooling, and the organic matter is volatilized and decomposed at high temperature. Because the melting point interval of the waste salt has large fluctuation, adverse phenomena such as slag bonding, caking and the like are easy to occur in the incineration treatment process, and the process stability is influenced.
Inorganic salt is an important basic resource, so that a method for deeply refining waste salt resource utilization brine is provided, the burned waste salt is deeply treated and recycled to obtain a high-quality evaporative crystalline salt product, the resource recovery is realized, the environmental pressure is relieved, and a certain economic value is created.
Disclosure of Invention
The invention aims to provide a method for deeply refining brine by resource utilization of waste salt, which solves the problem that the existing waste salt recovery means in the prior art needs to be improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for deep refining of brine by resource utilization of waste salt comprises the following steps:
the first step is as follows: conveying the waste salt into a salt dissolving barrel, adding water, stirring and dissolving to obtain crude salt water;
the second step is that: adding the crude brine obtained in the first step into a silicon and hardness removal system, and adding a chemical agent, wherein the effluent of the silicon and hardness removal system contains part of ash, calcium salt and magnesium salt small particles which are not completely settled;
the third step: carrying out solid-liquid separation on the effluent obtained in the second step by a coagulation and air floatation all-in-one machine, conveying floating slag and chemical precipitates to a plate-and-frame filter press for dehydration treatment, and leaving liquid effluent;
the fourth step: regulating the pH of the effluent obtained in the third step by using a hydrochloric acid neutralization regulating tank to obtain liquid effluent;
the fifth step: the effluent water obtained in the fourth step enters an advanced treatment working section, and the advanced treatment working section comprises ozone oxidation system treatment and resin adsorption system treatment to obtain brine;
and a sixth step: and (4) evaporating and crystallizing the brine obtained in the fifth step to obtain pure inorganic salt.
Preferably, in the first step, the waste salt is conveyed to the salt dissolving barrel by a belt conveyor, wherein the water is added into tap water or recycled water.
Preferably, in the second step, the brine enters the silicon and hardness removal system through a lift pump, and in the fifth step, the effluent water in the fourth step enters the ozone oxidation system through the lift pump.
Preferably, in the second step, the chemical agents respectively added to the silicon and hardness removing system are calcium oxide, magnesium oxide and sodium carbonate.
Preferably, in the fifth step, after the ozone oxidation treatment, the brine is subjected to ozone removal in the water body through the stabilizer and then enters the resin adsorption system.
Preferably, in the fifth step, the resin adsorption system comprises a macroporous resin tower for resin adsorption treatment, and a precision filter is installed at a water inlet of the macroporous resin tower.
Preferably, in the fifth step, the resin adsorption system further comprises a chelating resin adsorption system for removing organic matters and calcium and magnesium in the brine.
The invention has at least the following beneficial effects:
1. according to the method, the burnt waste salt is subjected to silicon removal, hardness removal, advanced oxidation, resin adsorption and other treatment, the obtained brine effluent can be subjected to evaporation treatment, the condensate can be recycled in a crude salt dissolving working section, the evaporated crystalline salt is a product, the whole set of advanced treatment process ensures the product quality of the evaporated crystalline salt, the reasonable recycling of the waste salt is realized, the environmental pressure is relieved, and the method has good economic value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for deep refining of brine by resource utilization of waste salt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1, a method for deep refining of brine by resource utilization of waste salt comprises the following steps:
the first step is as follows: conveying the waste salt into a salt dissolving barrel, adding water, stirring and dissolving to obtain crude salt water; conveying the waste salt to a salt dissolving barrel through a belt conveyor, wherein the water is added into tap water or recycled water;
the second step is that: adding the crude brine obtained in the first step into a silicon and hardness removal system, and adding a chemical agent, wherein the effluent of the silicon and hardness removal system contains part of ash, calcium salt and magnesium salt small particles which are not completely settled; the brine enters a silicon and hardness removal system through a lift pump; the chemical agents respectively added in the silicon and hardness removing system are calcium oxide, magnesium oxide and sodium carbonate; the chemical reactions mainly involved include the following:
；
；
；
the third step: carrying out solid-liquid separation on the effluent obtained in the second step by a coagulation and air floatation all-in-one machine, conveying floating slag and chemical precipitates to a plate-and-frame filter press for dehydration treatment, and leaving liquid effluent;
the fourth step: regulating the pH of the effluent obtained in the third step by using a hydrochloric acid neutralization regulating tank to obtain liquid effluent;
the fifth step: the effluent water obtained in the fourth step enters an advanced treatment working section, and the advanced treatment working section comprises ozone oxidation system treatment and resin adsorption system treatment to obtain brine; the effluent water of the fourth step enters an ozone oxidation system through a lift pump, and ozone has strong oxidation capacity and can react with most organic matters to reduce TOC; after the salt water is subjected to ozone oxidation treatment, removing ozone in the water body through a stabilizer, and then entering a resin adsorption system; the resin adsorption system comprises a macroporous resin tower for resin adsorption treatment, a precise filter is arranged at a water inlet of the macroporous resin tower, and the macroporous resin not only can remove calcium and magnesium ions, but also can remove organic matters to a certain extent; the resin adsorption system also comprises a chelating resin adsorption system for removing organic matters and calcium and magnesium in the brine, so that heavy metal is removed in the chelating resin adsorption system, and the indexes of the heavy metal in the final product are ensured;
and a sixth step: evaporating and crystallizing the brine obtained in the fifth step to obtain pure inorganic salt;
in the embodiment, the method carries out treatments such as desiliconization, hardness removal, advanced oxidation and resin adsorption on the incinerated waste salt, the obtained brine effluent can be subjected to evaporation treatment, the condensate can be recycled in a crude salt dissolving working section, the evaporated crystal salt is a product, the whole set of advanced treatment process ensures the product quality of the evaporated crystal salt, the reasonable recycling of the waste salt is realized, the environmental pressure is relieved, and the method has good economic value.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A method for deeply refining brine by resource utilization of waste salt is characterized by comprising the following steps:
the first step is as follows: conveying the waste salt into a salt dissolving barrel, adding water, stirring and dissolving to obtain crude salt water;
the second step is that: adding the crude brine obtained in the first step into a silicon and hardness removal system, and adding a chemical agent, wherein the effluent of the silicon and hardness removal system contains part of ash, calcium salt and magnesium salt small particles which are not completely settled;
the third step: carrying out solid-liquid separation on the effluent obtained in the second step by a coagulation and air floatation all-in-one machine, conveying floating slag and chemical precipitates to a plate-and-frame filter press for dehydration treatment, and leaving liquid effluent;
the fourth step: regulating the pH of the effluent obtained in the third step by using a hydrochloric acid neutralization regulating tank to obtain liquid effluent;
the fifth step: the effluent water obtained in the fourth step enters an advanced treatment working section, and the advanced treatment working section comprises ozone oxidation system treatment and resin adsorption system treatment to obtain brine;
and a sixth step: and (4) evaporating and crystallizing the brine obtained in the fifth step to obtain pure inorganic salt.
2. The method for deep refining of waste salt resource utilization brine as claimed in claim 1, wherein in the first step, the waste salt is conveyed to a salt dissolving barrel through a belt conveyor, wherein the water is added into tap water or recycled water.
3. The method for deep refining of waste salt resource utilization brine as claimed in claim 1, wherein in the second step, the brine is introduced into a silicon and hardness removal system through a lift pump, and in the fifth step, the effluent of the fourth step is introduced into an ozone oxidation system through a lift pump.
4. The method as claimed in claim 1, wherein the chemical agents added to the silicon and hardness removal system in the second step are calcium oxide, magnesium oxide and sodium carbonate.
5. The method for deep refining of waste salt resource utilization brine as claimed in claim 1, wherein in the fifth step, after ozone oxidation treatment, the brine is subjected to ozone removal from a water body through a stabilizer and then enters a resin adsorption system.
6. The method for deep refining of waste salt resource utilization brine as claimed in claim 1, wherein in the fifth step, the resin adsorption system comprises a macroporous resin tower for resin adsorption treatment, and a precise filter is installed at a water inlet of the macroporous resin tower.
7. The method for deep refining of waste salt resource utilization brine as claimed in claim 1, wherein in the fifth step, the resin adsorption system further comprises a chelating resin adsorption system for removing organic matters and calcium and magnesium in the brine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110253289.8A CN112979034A (en) | 2021-03-05 | 2021-03-05 | Deep refining method for salt water by resource utilization of waste salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110253289.8A CN112979034A (en) | 2021-03-05 | 2021-03-05 | Deep refining method for salt water by resource utilization of waste salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112979034A true CN112979034A (en) | 2021-06-18 |
Family
ID=76335690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110253289.8A Pending CN112979034A (en) | 2021-03-05 | 2021-03-05 | Deep refining method for salt water by resource utilization of waste salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112979034A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230081A (en) * | 2021-12-24 | 2022-03-25 | 华能辛店发电有限公司 | Method for preparing snow-melting agent and deicing fan blades by using desulfurization wastewater |
| CN115870318A (en) * | 2022-12-22 | 2023-03-31 | 重庆盎瑞悦科技有限公司 | Waste salt refining and impurity removing treatment process and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970079A (en) * | 2019-04-02 | 2019-07-05 | 江苏杰林环保科技有限公司 | A kind of chemical industry abraum salt refining methd |
| CN110606612A (en) * | 2019-11-04 | 2019-12-24 | 江苏中电创新环境科技有限公司 | Coal coking high-salinity wastewater recycling treatment process |
| CN110844922A (en) * | 2019-11-15 | 2020-02-28 | 清大国华环境集团股份有限公司 | Method and equipment for recycling industrial waste salt |
| CN111039478A (en) * | 2020-01-14 | 2020-04-21 | 北京赛科康仑环保科技有限公司 | Method for realizing resource utilization of byproduct NaCl waste salt in coal chemical wastewater treatment |
-
2021
- 2021-03-05 CN CN202110253289.8A patent/CN112979034A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970079A (en) * | 2019-04-02 | 2019-07-05 | 江苏杰林环保科技有限公司 | A kind of chemical industry abraum salt refining methd |
| CN110606612A (en) * | 2019-11-04 | 2019-12-24 | 江苏中电创新环境科技有限公司 | Coal coking high-salinity wastewater recycling treatment process |
| CN110844922A (en) * | 2019-11-15 | 2020-02-28 | 清大国华环境集团股份有限公司 | Method and equipment for recycling industrial waste salt |
| CN111039478A (en) * | 2020-01-14 | 2020-04-21 | 北京赛科康仑环保科技有限公司 | Method for realizing resource utilization of byproduct NaCl waste salt in coal chemical wastewater treatment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230081A (en) * | 2021-12-24 | 2022-03-25 | 华能辛店发电有限公司 | Method for preparing snow-melting agent and deicing fan blades by using desulfurization wastewater |
| CN114230081B (en) * | 2021-12-24 | 2024-04-16 | 华能辛店发电有限公司 | Method for preparing snow-melting agent and for deicing fan blades by using desulfurization wastewater |
| CN115870318A (en) * | 2022-12-22 | 2023-03-31 | 重庆盎瑞悦科技有限公司 | Waste salt refining and impurity removing treatment process and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100548906C (en) | The removal method of ammonia nitrogen in a kind of coking chemical waste water | |
| US11332379B2 (en) | Industrial waste salt resourceful treatment method and device | |
| CN106865571B (en) | Method for preparing sodium bicarbonate and ammonium sulfate from chemical concentrated brine | |
| CN100537458C (en) | Method for removing ammonia and nitrogen in garbage percolate | |
| CN112605094B (en) | Harmless treatment and green cyclic resource utilization method for high-salt-content hazardous waste | |
| CN109293148B (en) | Treatment device and treatment method for sulfur-containing and salt-containing wastewater | |
| CN102267769A (en) | Vacuum potassium carbonate method for utilizing coke oven coal gas desulphurization and decyanation waste liquid as resource | |
| CN109928563A (en) | A kind of shale gas well-drilling waste water processing method | |
| CN107673514A (en) | Sulfate radical removes the Waste Water Treatment utilized with recycling sludge and processing method | |
| CN112979034A (en) | Deep refining method for salt water by resource utilization of waste salt | |
| CN111661972A (en) | Process for treating and recycling lead-zinc smelting flue gas washing waste acid | |
| CN101628771B (en) | Method with zero discharge of waste water | |
| CN113480077A (en) | High-salt high-COD wastewater recovery and zero-discharge treatment device and process | |
| CN112093965A (en) | Moderate stepwise cooperative pretreatment process for mine water treatment | |
| CN112079516A (en) | Zero-discharge and salt-separation recycling treatment process for high-concentration brine | |
| CN106007093A (en) | Zero discharge method for heavy metal waste water | |
| CN215391554U (en) | Waste salt resourceful treatment system | |
| CN114835338A (en) | Method for treating percolate concentrated solution of refuse landfill | |
| WO2024060693A1 (en) | Coal chemical wastewater treatment method and system | |
| CN105000745B (en) | A kind of sulfur Gas Fields produced water treatment system | |
| CN104445799B (en) | The treatment process of a kind of high salt, ammonia nitrogen and unmanageable solution of gold smelting plant waste water | |
| CN111573980A (en) | Treatment process of wastewater containing ammonium sulfate and high content of organic matters | |
| CN110156237A (en) | A kind of waste water water conservancy recovery method | |
| CN113429083B (en) | Zero-liquid discharge treatment process and system for mixed wastewater of tar processing and needle coke | |
| CN105174581A (en) | Sulfur-containing gas field produced water treatment process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210618 |
|
| RJ01 | Rejection of invention patent application after publication |