CN111517338A - Dechlorination process for solid product of desulfurization waste liquid salt extraction device - Google Patents
Dechlorination process for solid product of desulfurization waste liquid salt extraction device Download PDFInfo
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- CN111517338A CN111517338A CN202010240570.3A CN202010240570A CN111517338A CN 111517338 A CN111517338 A CN 111517338A CN 202010240570 A CN202010240570 A CN 202010240570A CN 111517338 A CN111517338 A CN 111517338A
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- Prior art keywords
- solid product
- waste liquid
- desulfurization waste
- extraction device
- salt extraction
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- 239000007788 liquid Substances 0.000 title claims abstract description 52
- 239000012265 solid product Substances 0.000 title claims abstract description 44
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 43
- 230000023556 desulfurization Effects 0.000 title claims abstract description 43
- 239000002699 waste material Substances 0.000 title claims abstract description 43
- 150000003839 salts Chemical class 0.000 title claims abstract description 42
- 238000000605 extraction Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000006298 dechlorination reaction Methods 0.000 title claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000000889 atomisation Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000000047 product Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 claims description 7
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 2
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007738 vacuum evaporation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/20—Thiocyanic acid; Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/64—Thiosulfates; Dithionites; Polythionates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
-
- 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
- C01D5/16—Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a solid product dechlorination process of a desulfurization waste liquid salt extraction device, belonging to the technical field of chemical industry, and the treatment process comprises the following steps: 1) dissolving: adding Cl‑Adding the solid product of the desulfurization waste liquid salt extraction device with higher content into a dissolving agent for dissolving and filtering to obtain a dissolved solution; 2) concentration: concentrating the dissolved solution to obtain a concentrated solution; 3) drying and separating: carrying out atomization, drying and separation on the concentrated solution to respectively obtain a dechlorinated solid product and a dried tail gas; 4) tail gas treatment: and (3) dedusting, condensing and cooling the dried tail gas in sequence to obtain condensate and non-condensable gas, and discharging the non-condensable gas into the atmosphere after the non-condensable gas is absorbed by the absorption liquid. The method can effectively remove the desulfurization waste liquid and extract saltCl in solid products‑And the quality grade of the solid product of the desulfurization waste liquid salt extraction device is improved.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a solid product dechlorination process of a desulfurization waste liquid salt extraction device.
Background
With the development of economy, the demand of people on good environment is increasing day by day, and the national environmental protection policy is becoming stricter. In order to meet the requirements of national policies, many coking enterprises construct desulfurization waste liquid salt extraction devices in many times, so as to extract solid salt products with high added values from desulfurization waste liquid, thereby performing resource treatment on the desulfurization waste liquid. Although various solid salts produced by the desulfurization waste liquid salt extraction device have wide application, the dosage is less. At present, the market demand of solid products of various desulfurization waste liquid salt extraction devices is basically in a saturated state. Due to the market of buyers and the high selectivity of the buyers, the quality requirement on solid products of the desulfurization waste liquid salt extraction device is more and more strict. Cl in solid product of desulfurization waste liquid salt extraction device-And other toxic and harmful ions, can bring adverse effects to downstream products, and has strong corrosion to equipment and pipelines of downstream manufacturers. At present, Cl-The content of the sodium chloride is a main index for judging the quality of solid products of a desulfurization waste liquid salt extraction device.
The construction of the desulfurization waste liquid salt extraction device is generally earlier, and no specific dechlorination process exists, so that partial device products are Cl-The content is higher, so that the product grade is judged to be lower, and the economic benefit of the desulfurization waste liquid salt extraction device is directly influenced.
Thus, Cl is removed-Cl in solid product of high-content desulfurization waste liquid salt extraction device-The quality grade of the product can be improved, and the profitability of the desulfurization waste liquid salt extraction device is enhanced. And simultaneously, the protection of equipment and pipelines of downstream manufacturers is facilitated.
Disclosure of Invention
The invention aims to solve the technical problem of providing a solid product dechlorination process of a desulfurization waste liquid salt extraction device. The invention utilizes Cl-Method for preparing Cl from solid product of high-content desulfurization waste liquid salt extraction device-The solid product of the desulfurization waste liquid salt extraction device with lower content can improve the product grade.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: dechlorination process for solid product of desulfurization waste liquid salt extraction device, namely removing Cl-In a relatively high contentCl in solid product of desulfurization waste liquid salt extraction device-。
Preferably, the process is also suitable for removing other ions in the solid product of the desulfurization waste liquid salt extraction device, such as: fluorine ion, bromine ion, and the like, but are not limited to the above ions.
The solid product dechlorination process of the desulfurization waste liquid salt extraction device comprises the following steps:
(1) dissolving and filtering: adding Cl-Adding the solid product of the desulfurization waste liquid salt extraction device with higher content into a dissolving agent for dissolving and filtering to obtain a dissolved solution;
(2) and (3) evaporation and concentration: concentrating the dissolved solution to obtain a concentrated solution;
(3) drying and separating: carrying out atomization, drying and separation on the concentrated solution to obtain a dechlorinated solid product and a dried tail gas;
(4) tail gas treatment: and (3) dedusting, condensing and cooling the dried tail gas in sequence to obtain condensate and non-condensable gas, and discharging the non-condensable gas into the atmosphere after the non-condensable gas is absorbed by the absorption liquid.
Preferably, in the step (1), the solid product of the desulfurization waste liquid salt extraction device can be, but is not limited to: and the dissolving concentration of any one or more of ammonium thiocyanate, sodium thiocyanate, ammonium sulfate, sodium sulfate, ammonium thiosulfate and sodium thiosulfate is lower than the saturated concentration of the dissolved materials at the dissolving temperature in the dissolving agent.
Preferably, in the step (2), the concentration pressure is-0.095 MPa-0.1 MPa, the temperature is 60 ℃ to 110 ℃, and the concentration of the concentrated material is greater than the saturation concentration of the material at room temperature.
Preferably, in the step (4), the tail gas is processed by a dust remover to obtain solid particles as dechlorination products; the condensate is recycled as a dissolving agent.
Preferably, in the step (4), the condensate is recycled as the dissolving agent.
Preferably, in the step (4), the absorbent may be any one or more of pure water, dilute sulfuric acid solution, and dilute ammonia water, but is not limited thereto.
Preferably, the dissolving agent in the step (1) can be any one or more of methanol, ethanol and water, but is not limited to the above substances.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
the invention relates to a solid product dechlorination process of a desulfurization waste liquid salt extraction device, which utilizes Cl-Method for preparing Cl from solid product of high-content desulfurization waste liquid salt extraction device-The solid product of the desulfurization waste liquid salt extraction device with lower content improves the product quality grade, and enhances the profitability of the desulfurization waste liquid salt extraction device.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a flow chart of the dechlorination process.
Detailed Description
The invention is further described below with reference to specific examples.
For removing Cl-Cl in solid product of high-content desulfurization waste liquid salt extraction device-The invention provides a dechlorination process for a solid product of a desulfurization waste liquid salt extraction device, which can simply and reliably remove Cl in the solid product of the desulfurization waste liquid salt extraction device-. The present invention will be described in detail below with reference to specific examples.
Example 1
(1) Dissolving and filtering: adding an ammonium thiocyanate product of a certain desulfurization waste liquid salt extraction device into pure water at 40 ℃ for dissolving, and filtering to obtain a 40% ammonium thiocyanate solution;
(2) and (3) evaporation and concentration: carrying out vacuum evaporation concentration on the filtered 40% ammonium thiocyanate solution to obtain a concentrated solution; the pressure is-0.09 MPa, the temperature is 85 ℃, and the concentration end point is that the concentration of ammonium thiocyanate is 80%;
(3) drying and separating: carrying out atomization drying and separation on the concentrated solution to obtain a dechlorinated solid product and a dried tail gas;
(4) condensation and cooling: the dried tail gas is sequentially subjected to dust removal, condensation and cooling to obtain condensate and non-condensable gas, and the non-condensable gas is absorbed by the absorption liquid and then is discharged into the atmosphere; the temperature of the condensate liquid is 40 ℃, and the absorption liquid is pure water.
Technical requirements for HG/T2154-2012 industrial ammonium thiocyanate: qualified product Cl-The content is less than or equal to 0.13 percent, and first-class and high-class Cl products-The content is less than or equal to 0.6 percent.
Example 2
(1) Dissolving and filtering: adding a sodium thiocyanate product of a certain desulfurization waste liquid salt extraction device into pure water at 40 ℃ for dissolving, and filtering to obtain a 50% sodium thiocyanate solution;
(2) and (3) evaporation and concentration: carrying out vacuum evaporation concentration on the filtered 50% sodium thiocyanate solution to obtain a concentrated solution; the pressure is-0.08 MPa, the temperature is 90 ℃, and the concentration end point is that the concentration of sodium thiocyanate is 70%;
(3) drying and separating: carrying out atomization drying and separation on the concentrated solution to obtain a dechlorinated solid product and a dried tail gas;
(4) condensation and cooling: the dried tail gas is sequentially subjected to dust removal, condensation and cooling to obtain condensate and non-condensable gas, and the non-condensable gas is absorbed by the absorption liquid and then is discharged into the atmosphere; the temperature of the condensate liquid is 40 ℃, and the absorption liquid is pure water.
Technical requirements of industrial sodium thiocyanate HG/T3812-2006: qualified product Cl-The content is less than or equal to 0.04 percent, and first-class Cl-The content is less than or equal to 0.3 percent, and the superior product Cl-The content is less than or equal to 0.2 percent.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (9)
1. A solid product dechlorination process of a desulfurization waste liquid salt extraction device is characterized in that: removal of Cl-Cl in solid product of high-content desulfurization waste liquid salt extraction device-。
2. The process of claim 1, wherein the solid product dechlorination process comprises the following steps: the process is also suitable for removing other ions in the solid product of the desulfurization waste liquid salt extraction device, such as: fluorine ion, bromine ion, and the like, but are not limited to the above ions.
3. A solid product dechlorination process of a desulfurization waste liquid salt extraction device is characterized by comprising the following steps:
(1) dissolving and filtering: adding Cl-Adding the solid product of the desulfurization waste liquid salt extraction device with higher content into a dissolving agent for dissolving and filtering to obtain a dissolved solution;
(2) and (3) evaporation and concentration: concentrating the dissolved solution to obtain a concentrated solution;
(3) drying and separating: carrying out atomization, drying and separation on the concentrated solution to obtain a dechlorinated solid product and a dried tail gas;
(4) tail gas treatment: and (3) dedusting, condensing and cooling the dried tail gas in sequence to obtain condensate and non-condensable gas, and discharging the non-condensable gas into the atmosphere after the non-condensable gas is absorbed by the absorption liquid.
4. The process of claim 3, wherein the solid product dechlorination process comprises the following steps: in the step (1), the solid product of the desulfurization waste liquid salt extraction device can be, but is not limited to: and the dissolving concentration of any one or more of ammonium thiocyanate, sodium thiocyanate, ammonium sulfate, sodium sulfate, ammonium thiosulfate and sodium thiosulfate is lower than the saturated concentration of the dissolved materials at the dissolving temperature in the dissolving agent.
5. The process of claim 3, wherein the solid product dechlorination process comprises the following steps: in the step (2), the concentration pressure is-0.095 MPa-0.1 MPa, the temperature is 60-110 ℃, and the concentration of the concentrated material is greater than the saturated concentration of the material at room temperature.
6. The process of claim 3, wherein the solid product dechlorination process comprises the following steps: in the step (4), the tail gas is processed by a dust remover to obtain solid particles as dechlorination products; the condensate is recycled as a dissolving agent.
7. The process of claim 3, wherein the solid product dechlorination process comprises the following steps: in the step (4), the condensate is recycled as a dissolving agent.
8. The process of claim 3, wherein the solid product dechlorination process comprises the following steps: in the step (4), the absorbent may be any one or more of pure water, dilute sulfuric acid solution, and dilute ammonia water, but is not limited to the above.
9. The process of claim 3, wherein the solid product dechlorination process comprises the following steps: the dissolving agent in the step (1) can be any one or more of methanol, ethanol and water, but is not limited to the above substances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010240570.3A CN111517338A (en) | 2020-03-31 | 2020-03-31 | Dechlorination process for solid product of desulfurization waste liquid salt extraction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010240570.3A CN111517338A (en) | 2020-03-31 | 2020-03-31 | Dechlorination process for solid product of desulfurization waste liquid salt extraction device |
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| Publication Number | Publication Date |
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| CN111517338A true CN111517338A (en) | 2020-08-11 |
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| CN202010240570.3A Pending CN111517338A (en) | 2020-03-31 | 2020-03-31 | Dechlorination process for solid product of desulfurization waste liquid salt extraction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115488139A (en) * | 2022-09-28 | 2022-12-20 | 中冶南方都市环保工程技术股份有限公司 | Raw material pretreatment system and method for producing acid by burning desulfurization waste liquid and crude salt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058442A (en) * | 2013-01-25 | 2013-04-24 | 甘肃银光聚银化工有限公司 | Method for processing secondary salt in desulphurization waste liquid |
| CN105236647A (en) * | 2015-09-25 | 2016-01-13 | 太原理工大学 | Method used for pyrolyzing wet oxidation desulfurization mixed waste liquid in partial oxidation environment |
| CN108083538A (en) * | 2017-12-25 | 2018-05-29 | 武汉科技大学 | The recycling processing method and its device of coking desulfurization salt bearing liquid wastes |
-
2020
- 2020-03-31 CN CN202010240570.3A patent/CN111517338A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058442A (en) * | 2013-01-25 | 2013-04-24 | 甘肃银光聚银化工有限公司 | Method for processing secondary salt in desulphurization waste liquid |
| CN105236647A (en) * | 2015-09-25 | 2016-01-13 | 太原理工大学 | Method used for pyrolyzing wet oxidation desulfurization mixed waste liquid in partial oxidation environment |
| CN108083538A (en) * | 2017-12-25 | 2018-05-29 | 武汉科技大学 | The recycling processing method and its device of coking desulfurization salt bearing liquid wastes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115488139A (en) * | 2022-09-28 | 2022-12-20 | 中冶南方都市环保工程技术股份有限公司 | Raw material pretreatment system and method for producing acid by burning desulfurization waste liquid and crude salt |
| CN115488139B (en) * | 2022-09-28 | 2024-05-17 | 中冶南方都市环保工程技术股份有限公司 | Raw material pretreatment system and method for desulfurizing waste liquid and firing acid by crude salt incineration |
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