CN111410212A - Method for recycling sulfuric acid production wastewater - Google Patents
Method for recycling sulfuric acid production wastewater Download PDFInfo
- Publication number
- CN111410212A CN111410212A CN202010159736.9A CN202010159736A CN111410212A CN 111410212 A CN111410212 A CN 111410212A CN 202010159736 A CN202010159736 A CN 202010159736A CN 111410212 A CN111410212 A CN 111410212A
- Authority
- CN
- China
- Prior art keywords
- liquid
- filter pressing
- reaction
- treatment
- sulfur
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/244—Preparation by double decomposition of ammonium salts with sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/50—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/26—Carbonates or bicarbonates of ammonium
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention belongs to the field of wastewater recovery treatment, and particularly discloses a method for recycling sulfuric acid production wastewater, which comprises the following steps: pretreating sulfur-containing wastewater to obtain sulfur-containing wastewater pretreatment liquid; sampling and analyzing the sulfur-containing wastewater, obtaining the concentration of sulfate in the pretreatment liquid, adding a medicament for neutralization, and generating a primary liquid after neutralization; performing filter pressing and secondary treatment, namely putting the primary liquid into a filter pressing device for filter pressing to obtain a calcium sulfate filter cake after filter pressing, and performing secondary treatment on filter pressing waste liquid after filter pressing; pulping, namely putting the calcium sulfate filter cake into a pulping device for pulping, adding water into the pulping, and pulping to form calcium sulfate slurry; placing the calcium sulfate slurry into a reaction barrel for decomposition reaction to generate reaction liquid and treatment liquid; and (3) placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing, and performing crystallization filtration after filter pressing. The recovery method is simple and easy to realize, and simultaneously, the calcium carbonate and the carbon dioxide generated in the treatment process can be used as recovery products.
Description
Technical Field
The invention relates to the field related to wastewater recovery treatment, in particular to a method for recycling sulfuric acid production wastewater.
Background
Sulfuric acid is an important basic chemical raw material, is widely applied in the industries of chemical engineering, steel and the like, and is commonly used as a dehydrating agent, a reaction intermediate, a cleaning agent, a catalyst and the like in the industry. In many production processes, the utilization rate of sulfuric acid wastewater is low, and a large amount of sulfuric acid wastewater is discharged along with other wastewater; if the waste water is discharged into the environment without being treated, the water body or the soil can be acidified, the ecological environment is harmed, and a large amount of sulfuric acid resources are wasted.
Because the recovery cost of the sulfuric acid is high, many enterprises do not carry out recovery treatment on the sulfuric acid or discharge the sulfuric acid wastewater after adding the sulfuric acid wastewater into lime for neutralization treatment. These processes are not only costly, but also may cause environmental pollution and waste of resources.
Disclosure of Invention
The invention aims to provide a method for recycling sulfuric acid production wastewater, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for recycling sulfuric acid production wastewater comprises the following steps:
s1: pretreating sulfur-containing wastewater, namely pressing the sulfur-containing wastewater into a filtering treatment container through a pressure pump, filtering the sulfur-containing wastewater to remove fine suspended matters in the wastewater, and filtering to obtain sulfur-containing wastewater pretreatment liquid;
s2: sampling and analyzing sulfur-containing wastewater, namely sampling and analyzing a sulfur-containing wastewater pretreatment solution in S1 to obtain the concentration of sulfate in the pretreatment solution, adding a medicament for neutralization, and generating a primary solution after neutralization;
s3: performing filter pressing and secondary treatment, namely putting the primary liquid into a filter pressing device for filter pressing to obtain a calcium sulfate filter cake after filter pressing, and performing secondary treatment on filter pressing waste liquid after filter pressing;
s4: pulping, namely putting the calcium sulfate filter cake into a pulping device for pulping, adding water into the pulping, wherein the mass ratio of the water to the filter cake is 2-4:4-5, and pulping to form calcium sulfate slurry;
s5: placing the calcium sulfate slurry in the reaction barrel of S4 for decomposition reaction to generate reaction liquid and treatment liquid;
s6: and (3) placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing, and performing crystallization filtration after the secondary filter pressing.
As a preferred technical scheme of the invention, the S2 traditional Chinese medicine is calcium carbonate, and S2 specifically comprises: s21: sampling and analyzing the sulfur wastewater pretreatment liquid to obtain the concentration of sulfate; s22: adding the sulfur wastewater pretreatment liquid into a reaction container, adding a calcium carbonate medicament into the container, stirring to neutralize the calcium carbonate medicament, and generating calcium sulfate primary liquid and carbon dioxide after neutralization reaction.
As a preferable technical solution of the present invention, the secondary treatment of the pressure filtration waste liquid in S3 includes: and (3) putting the filter pressing waste liquid into a crystallization reaction vessel for separation, and separating calcium sulfate crystal particles and a separation liquid.
As a preferred technical solution of the present invention, S5 specifically includes: s51: placing the calcium sulfate slurry into a reaction barrel; s52: adding ammonium carbonate into the reaction barrel, and reacting the ammonium carbonate with calcium sulfate to generate reaction liquid and treatment liquid, wherein the reaction liquid and the treatment liquid are ammonium sulfate saturated liquid and calcium carbonate emulsion respectively.
As a preferable technical scheme of the invention, the mass ratio of ammonium carbonate to calcium sulfate in S51 is 2-5: 6-8.
As a preferred technical solution of the present invention, S6 specifically includes: s61: placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing to obtain a calcium carbonate filter cake and an ammonium sulfate saturated liquid; s62: putting the saturated ammonium sulfate solution into a crystallization reaction container for crystallization and precipitation; s63: and (4) putting the crystal separated out into a centrifugal machine for centrifugal filtration until solid-liquid separation of ammonium sulfate is carried out to obtain ammonium sulfate solid.
As a preferable technical scheme of the invention, the carbon dioxide generated by S22 can be used for preparing ammonium carbonate from ammonia and water.
Compared with the prior art, the invention has the beneficial effects that:
the recovery treatment method is simple and easy to implement, the recovery method is environment-friendly, sulfate in the wastewater can be recovered, sulfuric acid in the wastewater is separated, favorable conditions are created for biochemical treatment of the wastewater, and calcium carbonate and carbon dioxide generated in the treatment process can be used as recovery products, wherein the calcium carbonate can be repeatedly used in the recovery treatment method, the carbon dioxide can react with ammonia gas and water to generate ammonium carbonate salt, and the ammonium carbonate salt can be used as a chemical fertilizer, a printing and dyeing auxiliary agent and the like.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: the invention provides a technical scheme that: a method for recycling sulfuric acid production wastewater comprises the following steps:
s1: pretreating sulfur-containing wastewater, namely pressing the sulfur-containing wastewater into a filtering treatment container through a pressure pump, filtering the sulfur-containing wastewater to remove fine suspended matters in the wastewater, and filtering to obtain sulfur-containing wastewater pretreatment liquid;
s2: sampling and analyzing sulfur-containing wastewater, namely sampling and analyzing a sulfur-containing wastewater pretreatment solution in S1 to obtain the concentration of sulfate in the pretreatment solution, adding a medicament for neutralization, and generating a primary solution after neutralization;
s3: performing filter pressing and secondary treatment, namely putting the primary liquid into a filter pressing device for filter pressing to obtain a calcium sulfate filter cake after filter pressing, and performing secondary treatment on filter pressing waste liquid after filter pressing;
s4: pulping, namely putting the calcium sulfate filter cake into a pulping device for pulping, adding water into the pulping, wherein the mass ratio of the water to the filter cake is 2:3, and pulping to form calcium sulfate slurry;
s5: placing the calcium sulfate slurry in the reaction barrel of S4 for decomposition reaction to generate reaction liquid and treatment liquid;
s6: and (3) placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing, and performing crystallization filtration after the secondary filter pressing.
In this embodiment, the S2 herbal agent is calcium carbonate, and S2 specifically includes: s21: sampling and analyzing the sulfur wastewater pretreatment liquid to obtain the concentration of sulfate; s22: adding the sulfur wastewater pretreatment liquid into a reaction container, adding a calcium carbonate medicament into the container, stirring to neutralize the calcium carbonate medicament, and generating calcium sulfate primary liquid and carbon dioxide after neutralization reaction.
In this embodiment, the secondary treatment of the pressure filtration waste liquid in S3 includes: and (3) putting the filter pressing waste liquid into a crystallization reaction vessel for separation, and separating calcium sulfate crystal particles and a separation liquid.
In this embodiment, S5 specifically includes: s51: placing the calcium sulfate slurry into a reaction barrel; s52: adding ammonium carbonate into the reaction barrel, and reacting the ammonium carbonate with calcium sulfate to generate reaction liquid and treatment liquid, wherein the reaction liquid and the treatment liquid are ammonium sulfate saturated liquid and calcium carbonate emulsion respectively.
In this embodiment, the mass ratio of ammonium carbonate to calcium sulfate in S51 is 5: 8.
In this embodiment, S6 specifically includes: s61: placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing to obtain a calcium carbonate filter cake and an ammonium sulfate saturated liquid; s62: putting the saturated ammonium sulfate solution into a crystallization reaction container for crystallization and precipitation; s63: and (4) putting the crystal separated out into a centrifugal machine for centrifugal filtration until solid-liquid separation of ammonium sulfate is carried out to obtain ammonium sulfate solid.
In this embodiment, the carbon dioxide generated in S22 can be used to produce ammonium carbonate from ammonia and water.
Example 2:
s1: pretreating sulfur-containing wastewater, namely pressing the sulfur-containing wastewater into a filtering treatment container through a pressure pump, filtering the sulfur-containing wastewater to remove fine suspended matters in the wastewater, and filtering to obtain sulfur-containing wastewater pretreatment liquid;
s2: sampling and analyzing sulfur-containing wastewater, namely sampling and analyzing a sulfur-containing wastewater pretreatment solution in S1 to obtain the concentration of sulfate in the pretreatment solution, adding a medicament for neutralization, and generating a primary solution after neutralization;
s3: performing filter pressing and secondary treatment, namely putting the primary liquid into a filter pressing device for filter pressing to obtain a calcium sulfate filter cake after filter pressing, and performing secondary treatment on filter pressing waste liquid after filter pressing;
s4: pulping, namely putting the calcium sulfate filter cake into a pulping device for pulping, adding water into the pulping, wherein the mass ratio of the water to the filter cake is 4:4, and pulping to form calcium sulfate slurry;
s5: placing the calcium sulfate slurry in the reaction barrel of S4 for decomposition reaction to generate reaction liquid and treatment liquid;
s6: and (3) placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing, and performing crystallization filtration after the secondary filter pressing.
In this embodiment, S5 specifically includes: s51: placing the calcium sulfate slurry into a reaction barrel; s52: adding ammonium carbonate into the reaction barrel, and reacting the ammonium carbonate with calcium sulfate to generate reaction liquid and treatment liquid, wherein the reaction liquid and the treatment liquid are ammonium sulfate saturated liquid and calcium carbonate emulsion respectively.
In this embodiment, the mass ratio of ammonium carbonate to calcium sulfate in S51 is 3: 7.
In this embodiment, the carbon dioxide generated in S22 can be used for preparing ammonium carbonate from ammonia and water, specifically, the carbon dioxide and the ammonia are mixed to form a mixed gas, and the mixed gas enters from the gas inlet of the scrubber and is mixed with the water in the scrubber to form solid ammonium carbonate salt and liquid ammonia.
The recovery treatment method is simple and easy to implement, the recovery method is environment-friendly, sulfate in the wastewater can be recovered, sulfuric acid in the wastewater is separated, favorable conditions are created for biochemical treatment of the wastewater, and calcium carbonate and carbon dioxide generated in the treatment process can be used as recovery products, wherein the calcium carbonate can be repeatedly used in the recovery treatment method, the carbon dioxide can react with ammonia gas and water to generate ammonium carbonate salt, and the ammonium carbonate salt can be used as a chemical fertilizer, a printing and dyeing auxiliary agent and the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for recycling sulfuric acid production wastewater is characterized by comprising the following steps:
s1: pretreating sulfur-containing wastewater, namely pressing the sulfur-containing wastewater into a filtering treatment container through a pressure pump, filtering the sulfur-containing wastewater to remove fine suspended matters in the wastewater, and filtering to obtain sulfur-containing wastewater pretreatment liquid;
s2: sampling and analyzing sulfur-containing wastewater, namely sampling and analyzing a sulfur-containing wastewater pretreatment solution in S1 to obtain the concentration of sulfate in the pretreatment solution, adding a medicament for neutralization, and generating a primary solution after neutralization;
s3: filter pressing and secondary treatment, namely putting the primary liquid in the S2 into a filter pressing device for filter pressing to obtain a calcium sulfate filter cake, and performing secondary treatment on filter pressing waste liquid after filter pressing;
s4: pulping, namely putting the calcium sulfate filter cake into a pulping device for pulping, adding water into the pulping, wherein the mass ratio of the water to the filter cake is 2-4:4-5, and pulping to form calcium sulfate slurry;
s5: placing the calcium sulfate slurry in the reaction barrel of S4 for decomposition reaction to generate reaction liquid and treatment liquid;
s6: and (3) placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing, and performing crystallization filtration after the secondary filter pressing.
2. The method for recycling sulfuric acid production wastewater according to claim 1, wherein the S2 traditional Chinese medicine is calcium carbonate, and S2 specifically comprises: s21: sampling and analyzing the sulfur wastewater pretreatment liquid to obtain the concentration of sulfate; s22: adding the sulfur wastewater pretreatment liquid into a reaction container, adding a calcium carbonate medicament into the container, stirring to neutralize the calcium carbonate medicament, and generating calcium sulfate primary liquid and carbon dioxide after neutralization reaction.
3. The method for recycling sulfuric acid production wastewater according to claim 1, wherein the secondary treatment of the pressure filtration waste liquor in the S3 comprises: and (3) putting the filter pressing waste liquid into a crystallization reaction vessel for separation, and separating calcium sulfate crystal particles and a separation liquid.
4. The method for recycling sulfuric acid production wastewater according to claim 1, wherein the step S5 specifically comprises: s51: placing the calcium sulfate slurry into a reaction barrel; s52: adding ammonium carbonate into the reaction barrel, and reacting the ammonium carbonate with calcium sulfate to generate reaction liquid and treatment liquid, wherein the reaction liquid and the treatment liquid are ammonium sulfate saturated liquid and calcium carbonate emulsion respectively.
5. The method for recycling sulfuric acid production wastewater according to claim 4, wherein the mass ratio of ammonium carbonate to calcium sulfate in S51 is 2-5: 6-8.
6. The method for recycling sulfuric acid production wastewater according to claim 1, wherein the step S6 specifically comprises: s61: placing the reaction liquid and the treatment liquid into a filter pressing device for secondary filter pressing to obtain a calcium carbonate filter cake and an ammonium sulfate saturated liquid; s62: putting the saturated ammonium sulfate solution into a crystallization reaction container for crystallization and precipitation; s63: and (4) putting the crystal separated out into a centrifugal machine for centrifugal filtration until solid-liquid separation of ammonium sulfate is carried out to obtain ammonium sulfate solid.
7. The method for recycling sulfuric acid production wastewater according to claim 2, wherein the carbon dioxide generated in the S22 can be used for preparing ammonium carbonate from ammonia and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159736.9A CN111410212A (en) | 2020-03-09 | 2020-03-09 | Method for recycling sulfuric acid production wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159736.9A CN111410212A (en) | 2020-03-09 | 2020-03-09 | Method for recycling sulfuric acid production wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111410212A true CN111410212A (en) | 2020-07-14 |
Family
ID=71489203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010159736.9A Withdrawn CN111410212A (en) | 2020-03-09 | 2020-03-09 | Method for recycling sulfuric acid production wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111410212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113666388A (en) * | 2021-08-25 | 2021-11-19 | 浙江闰土股份有限公司 | Treatment method of dye wastewater |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095055A (en) * | 1993-05-08 | 1994-11-16 | 曾繁威 | Produce the novel process of vitriolate of tartar and ammonium chloride with the phosphogypsum conversion method |
| WO2010079369A1 (en) * | 2009-01-12 | 2010-07-15 | Nikolaos Papadopoulos | Valuable products obtained from red mud |
| US20140044619A1 (en) * | 2012-08-10 | 2014-02-13 | Sparstane Technologies LLC | Process for converting fgd gypsum to ammonium sulfate and calcium carbonate |
| CN108569812A (en) * | 2018-05-02 | 2018-09-25 | 乌海青石化学有限公司 | A kind of processing system and processing method of the waste water containing low-concentration sulfuric acid |
| CN110467952A (en) * | 2019-08-07 | 2019-11-19 | 安徽海德化工科技有限公司 | A kind of preparation method of liquefied petroleum gas oxidation desulfurizing agent |
-
2020
- 2020-03-09 CN CN202010159736.9A patent/CN111410212A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095055A (en) * | 1993-05-08 | 1994-11-16 | 曾繁威 | Produce the novel process of vitriolate of tartar and ammonium chloride with the phosphogypsum conversion method |
| WO2010079369A1 (en) * | 2009-01-12 | 2010-07-15 | Nikolaos Papadopoulos | Valuable products obtained from red mud |
| US20140044619A1 (en) * | 2012-08-10 | 2014-02-13 | Sparstane Technologies LLC | Process for converting fgd gypsum to ammonium sulfate and calcium carbonate |
| CN108569812A (en) * | 2018-05-02 | 2018-09-25 | 乌海青石化学有限公司 | A kind of processing system and processing method of the waste water containing low-concentration sulfuric acid |
| CN110467952A (en) * | 2019-08-07 | 2019-11-19 | 安徽海德化工科技有限公司 | A kind of preparation method of liquefied petroleum gas oxidation desulfurizing agent |
Non-Patent Citations (1)
| Title |
|---|
| 徐建等: "石膏晶须制造方法及用途新进展", 《广东化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113666388A (en) * | 2021-08-25 | 2021-11-19 | 浙江闰土股份有限公司 | Treatment method of dye wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4076515A (en) | Method for treatment of digester supernatant and other streams in wastewater treatment facilities | |
| CN106882884B (en) | A kind of method of chloride ion in recycling waste water | |
| CN102267769A (en) | Vacuum potassium carbonate method for utilizing coke oven coal gas desulphurization and decyanation waste liquid as resource | |
| CN110228889A (en) | A kind of processing method and stream treatment line of tin removal waste liquor | |
| CN113636576A (en) | System and method for disposing and recycling miscellaneous salt in coal chemical industry | |
| CN105174532B (en) | One kind is used for good antiscale property pretreatment system and its processing method before industrial waste water with high ammoniac nitrogen ammonia still process | |
| CN101823822A (en) | Method for treating waste brine sludge of soda by hydrochloric acid | |
| US3409545A (en) | Waste treatment process and process and apparatus for recovering lime | |
| CN111410212A (en) | Method for recycling sulfuric acid production wastewater | |
| CN108569812A (en) | A kind of processing system and processing method of the waste water containing low-concentration sulfuric acid | |
| CN102153127B (en) | Method for preparing gypsum by removing sulfate radicals from mineral salts with waste distillation liquid from ammonia alkali factory | |
| CN102795701A (en) | Method for treating acidic waste water from titanium dioxide preparation by sulfuric acid method | |
| CN103130196A (en) | Method for removing impurities from industrial sodium hydrosulfide | |
| CN106082535A (en) | The processing method of inorganic salt resource in a kind of ammonia process of desulfurization waste liquid | |
| CN113479985B (en) | Method for transformation deamination of ammonia nitrogen wastewater | |
| CN111892222B (en) | Ammonium sulfate wastewater recycling method | |
| CN104071805B (en) | A kind of industry subtracts the processing method of carbon emission and solid waste comprehensive utilization | |
| CN1294087C (en) | Method for treating waste acid from refining benzene for coking plant | |
| CN111003840A (en) | Process method for industrially preparing ferrous sulfide and Prussian blue | |
| CN216678203U (en) | Coal chemical industry miscellaneous salt processing system | |
| CN213708033U (en) | Lithium manganate effluent disposal system | |
| CN204981419U (en) | Be used for preventing before high ammonia -nitrogen concentration industrial waste water ammonia still process scale deposit pretreatment systems | |
| CN108178419A (en) | Waste water treatment system prepared by H acid monosodium salt | |
| CN116022982B (en) | Treatment method of glycine production wastewater | |
| CN107739041A (en) | A kind of system and method for clean manufacturing magnesium hydroxide |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200714 |