CN110790286A - Method for treating industrial byproduct sodium chloride - Google Patents
Method for treating industrial byproduct sodium chloride Download PDFInfo
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- CN110790286A CN110790286A CN201911146138.1A CN201911146138A CN110790286A CN 110790286 A CN110790286 A CN 110790286A CN 201911146138 A CN201911146138 A CN 201911146138A CN 110790286 A CN110790286 A CN 110790286A
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- 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
Abstract
The invention provides a method for treating industrial byproduct sodium chloride, which is characterized in that firstly, the incineration temperature is set to 400-1000 ℃; dissolving and absorbing by adopting alkali liquor such as sodium hydroxide and the like, rapidly cooling to below 200 ℃, simultaneously changing ferric chloride, copper chloride and aluminum chloride into precipitates by utilizing the sodium hydroxide to separate out, and further avoiding forming a precursor synthesized by dioxin such as chlorobenzene and the like after combustion; then, hypochlorous acid is strongly oxidized to remove organic impurities; finally, filtering and crystallizing to obtain the industrial sodium chloride with basically pure purity. The device comprises an incinerator, a waste gas treatment system and a solid waste treatment system, wherein the solid waste treatment system sequentially comprises a transmission mechanism, a dissolving tank, an oxidation tank, a decoloring device, a filtering device, a crystallization kettle and a drying tower. The invention has multiple functions of environmental protection, safety and resource utilization, and is suitable for large-scale production and application of chemical enterprises.
Description
Technical Field
The invention relates to a purification technology of byproduct sodium chloride in chemical production.
Background
In the production of various chemical products, a large amount of by-product sodium chloride is generated, wherein various organic or inorganic impurities are doped, and the sodium chloride can be recycled only by purification or purification treatment.
The invention with the patent application number of 2018103381130 discloses a process for recycling industrial sodium chloride, which belongs to the field of solid waste recycling treatment, and comprises the steps of firstly utilizing stripped ammonia water generated in industrial production to dissolve industrial sodium chloride to prepare ammonia brine, then pertinently removing impurities such as metal ions, chromaticity, suspended matters and the like brought in the industrial production, introducing carbon dioxide into the pretreated ammonia brine to carry out two-phase reaction, and adjusting acid, evaporating, concentrating, cooling and crystallizing to obtain a byproduct ammonium chloride with the purity of more than 97 percent, so as to reach the use standard of agricultural ammonium chloride. The by-product of the method is not sodium chloride, and the recycling of the sodium chloride cannot be realized.
The invention with the patent application number of 2019101770105 discloses a method for refining industrial sodium chloride waste salt slag, wherein the sodium chloride waste salt slag is pretreated by crushing and the like, then is subjected to heat treatment to remove organic matters, then is added with hot water and stirred to completely dissolve soluble salt and then is filtered, the obtained sodium chloride crude salt solution is subjected to purification treatment, is subjected to evaporation concentration, cooling crystallization and drying to obtain a sodium chloride product, and the evaporated and distilled water is completely recycled for dissolving the salt slag after the heat treatment. The invention is a simple combination of the traditional technology, does not properly treat the waste gas and liquid generated in the treatment process, lacks creativity, and is difficult to obtain authorization.
Disclosure of Invention
The purpose of the invention is as follows:
the method for treating the industrial byproduct sodium chloride provided by the invention adopts the process sequences of incineration, dissolution and absorption, oxidation (or decoloration), filtration, crystallization, drying and the like.
The technical scheme is as follows:
firstly, the burning temperature is set to 400-;
then dissolving and absorbing by alkali liquor such as sodium hydroxide, and rapidly cooling to below 200 ℃, avoiding the temperature range (250-350 ℃) for synthesizing dioxin. Meanwhile, ferric chloride, copper chloride and aluminum chloride (which are catalysts required by chlorobenzene synthesis of a dioxin precursor) can be changed into precipitates by using sodium hydroxide to be separated out, and further precursors synthesized by dioxin such as chlorobenzene and the like after combustion are prevented from being formed.
Then, hypochlorous acid is strongly oxidized to remove organic impurities; the oxidability is strong, and chlorate is reduced into chloride ions, so that other impurities can not be brought.
Finally, the industrial sodium chloride which is basically pure is obtained through the technical treatment of decoloration (granular active carbon decoloration, non-powder can not be dissolved and is easy to filter and remove), filtration, crystallization, drying and the like by a mature technology.
The disposal system of the industrial byproduct sodium chloride comprises an incinerator, a waste gas disposal system and a solid waste disposal system, wherein an exhaust pipe is arranged at the top end of the incinerator and connected with the waste gas disposal system, and the waste gas disposal system comprises a tail gas tank and an absorption tower; the bottom of the incinerator is provided with a discharge end, the discharge end is connected with the solid waste disposal system, and the solid waste disposal system sequentially comprises a transmission mechanism, a dissolving tank, an oxidation tank, a decoloring device, a filtering device, a crystallization kettle and a drying tower from upstream to downstream; wherein the dissolving tank is connected with the oxidation tank through a thick slurry pump and a pipeline; the oxidation tank, the decoloring device, the filtering device, the crystallization kettle and the drying tower are connected through pipelines; the alkali liquor tank is positioned above the absorption tower and the dissolving tank and is respectively connected with the absorption tower and the dissolving tank through pipelines; the hypochlorous acid tank is connected with the oxidation tank through a pipeline.
Preferably, an interlayer is arranged in the dissolving tank and divides the dissolving tank into an upper part and a lower part, wherein the lower part is a sedimentation cavity.
Preferably, an activated carbon layer is arranged in the decoloring device, the filtering device is a nanofiltration device, and the lye tank is a sodium hydroxide solution tank.
Has the advantages that:
the invention has multiple functions of environmental protection, safety and resource utilization, and is suitable for large-scale production and application of chemical enterprises.
The device of the invention is provided with the tail gas tank, the absorption tower and the sodium hydroxide circulating spray structure, can effectively treat the acid waste gas generated after incineration, overcomes the defect that the waste gas is not treated in the prior art, and reduces the pollution of the waste gas to the environment.
The sodium hydroxide adopted in the device can change the ferric chloride, the copper chloride and the aluminum chloride into precipitates through reaction to be separated out, the ferric chloride, the copper chloride and the aluminum chloride are catalysts required by chlorobenzene synthesis of dioxin precursors, and further precursors for synthesizing dioxin such as chlorobenzene and the like are prevented from being formed after combustion. Then, removing organic impurities by strong oxidation of hypochlorous acid; and then the industrial sodium chloride is subjected to decolorization, filtration, crystallization, drying and other processes to obtain the basically pure industrial sodium chloride which can be reused as a byproduct without landfill, thereby avoiding the defects that in the prior art, a large amount of solid waste can not be utilized and can only be used for landfill due to difficult separation of toxic and harmful impurities such as dioxin and the like in the solid waste. The invention has multiple functions of environmental protection, safety and resource utilization, and is suitable for large-scale production and application of chemical enterprises.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
in the figure: 1-an incinerator; 2-tail gas tank; 3-an absorption column; 4-lye tank; 5-a pump; 6-a dissolving tank; 7-a sedimentation chamber; 8-filtering plate; 9-thick slurry pump; 10-an oxidation tank; 11-a decolorization device; 12-a filtration device; 13-crystallization kettle; 14-a drying tower; 15-an activated carbon layer; 16-a transport mechanism; 17-spraying mechanism.
Detailed Description
Example 1:
the disposal system of the industrial byproduct sodium chloride shown in fig. 1 comprises an incinerator 1, a waste gas disposal system and a solid waste disposal system, wherein an exhaust pipe is arranged at the top end of the incinerator 1 and is connected with the waste gas disposal system, and the waste gas disposal system comprises an exhaust tank 2 and an absorption tower 3; the bottom of the incinerator 1 is provided with a discharge end, the discharge end is connected with the solid waste disposal system, and the solid waste disposal system sequentially comprises a transmission mechanism 16, a dissolving tank 6, an oxidation tank 10, a decoloring device 11, a filtering device 12, a crystallization kettle 13 and a drying tower 14 from upstream to downstream; an activated carbon layer 15 is arranged in the decolorizing device 11. Through thick slurry pump 9 and pipe connection between dissolving tank 6 and the oxidation groove, set up interlayer 8 in dissolving tank 6, this interlayer 8 separates into upper and lower two parts with this dissolving tank 6, wherein the part is precipitation chamber 7 below, set up the hole of densely covered range on the interlayer 8, the interlayer plays filterable effect, avoid the smell that produces in the reaction process simultaneously to give off the air from dissolving tank 6's uncovered, also avoid the sediment moisture evaporation in precipitation chamber 7 too fast, be favorable to going on of back technology.
Also comprises a sodium hydroxide lye tank 4 and a hypochlorous acid tank 18. The lye tank 4 is positioned above the absorption tower 3 and is respectively connected with the absorption tower 3 and the dissolving tank 6 through pipelines; the hypochlorous acid tank 18 is connected to the oxidation tank 10 through a pipe.
Dissolving the incinerated solid waste in a dissolving tank 6, adding a sodium hydroxide solution, and reacting ferric chloride, copper chloride and aluminum chloride contained in the solid waste with the sodium hydroxide solution to obtain a precipitate which is separated out; the three substances of ferric chloride, copper chloride and aluminum chloride are catalysts required by chlorobenzene synthesis of dioxin precursors, and further avoid the formation of precursors for synthesizing dioxin such as chlorobenzene and the like after combustion. The precipitate is pumped into an oxidation tank 10 by a concentrated liquid pump 9, hypochlorous acid is added into the oxidation tank by a hypochlorous acid tank to remove organic impurities in the precipitate, the organic impurities are removed by standing and layering, the residual inorganic precipitate enters a decoloring tank 11 through a pipeline after being added with water, is decolored and filtered by an activated carbon layer 15, is filtered by a filtering device 12, and then the filtrate enters a crystallization kettle 13. The drying tower 14 performs drying crystallization to obtain a high-purity sodium chloride by-product.
Claims (5)
1. A method for disposing industrial byproduct sodium chloride adopts the sequential treatment of incineration, dissolution and absorption, oxidation, filtration, crystallization and drying processes, and is characterized in that:
firstly, burning, wherein the temperature is set to 400-1000 ℃;
dissolving and absorbing with alkali solution such as sodium hydroxide, and rapidly cooling to below 200 deg.C;
then, oxidizing by a strong oxidant to remove organic impurities;
finally, the industrial sodium chloride which is basically pure is obtained through the processes of filtering, crystallizing and drying.
2. The method for disposing of industrial by-product sodium chloride according to claim 1, characterized in that: ferric chloride, cupric chloride and aluminum chloride are changed into precipitates by using sodium hydroxide to be separated out.
3. The method for disposing of industrial by-product sodium chloride according to claim 1, characterized in that: hypochlorous acid strong oxidant is adopted.
4. The method for disposing of industrial by-product sodium chloride according to claim 1, characterized in that: before filtering, activated carbon is adopted for decolorization treatment.
5. An apparatus adopting the method of claim 1, comprising an incinerator, a waste gas disposal system, and a solid waste disposal system, wherein: the top end of the incinerator is provided with an exhaust pipe, the exhaust pipe is connected with the waste gas disposal system, and the waste gas disposal system comprises an exhaust tank and an absorption tower; the bottom of the incinerator is provided with a discharge end, the discharge end is connected with the solid waste disposal system, and the solid waste disposal system comprises a transmission mechanism, a dissolving tank, an oxidation tank, a filtering device, a crystallization kettle and a drying tower which are sequentially connected from upstream to downstream; the alkali liquor tank is positioned above the absorption tower and the dissolving tank and is respectively connected with the absorption tower and the dissolving tank through pipelines; the hypochlorous acid tank is connected with the oxidation tank through a pipeline.
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| CN201911146138.1A CN110790286B (en) | 2019-11-17 | 2019-11-17 | Method for disposing industrial byproduct sodium chloride |
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| CN201911146138.1A CN110790286B (en) | 2019-11-17 | 2019-11-17 | Method for disposing industrial byproduct sodium chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115350500A (en) * | 2022-08-23 | 2022-11-18 | 宁夏日盛高新产业股份有限公司 | Byproduct comprehensive utilization system in foaming agent production |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003088726A (en) * | 2001-09-18 | 2003-03-25 | Takuma Co Ltd | Wet exhaust gas treatment method and system therefor |
| CN104649495A (en) * | 2015-02-13 | 2015-05-27 | 江苏中丹集团股份有限公司 | Chemical industrial waste salt refining process |
| CN106745076A (en) * | 2016-11-21 | 2017-05-31 | 大唐国际化工技术研究院有限公司 | A kind of method that Industrial Wastewater Treatment is produced carnallite resource |
| CN108529652A (en) * | 2018-04-16 | 2018-09-14 | 黄河三角洲京博化工研究院有限公司 | A kind of industrial chlorinations sodium resource utilization process |
| CN108793199A (en) * | 2018-05-24 | 2018-11-13 | 汶川县湘宁氯酸盐有限责任公司 | A method of recycling sodium chloride in preparing potassium chlorate waste water |
| CN109704369A (en) * | 2019-03-08 | 2019-05-03 | 浙江申联环保集团有限公司 | A method of sodium sulphate is recycled using sulfur acid sodium waste salt dregs |
| CN109867296A (en) * | 2019-03-08 | 2019-06-11 | 浙江申联环保集团有限公司 | A kind of industrial chlorinations sodium waste salt dregs refining methd |
| CN109956484A (en) * | 2019-03-27 | 2019-07-02 | 河北科技大学 | Organic impurities removing means in a kind of chlorine chemical process byproduct sodium chloride salt |
| CN110451530A (en) * | 2019-08-16 | 2019-11-15 | 中国科学院过程工程研究所 | A kind of fine purification treatment process of industrial waste salt containing organic matter of desalinization of soil by flooding or leaching combination ex situ oxidation |
-
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- 2019-11-17 CN CN201911146138.1A patent/CN110790286B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003088726A (en) * | 2001-09-18 | 2003-03-25 | Takuma Co Ltd | Wet exhaust gas treatment method and system therefor |
| CN104649495A (en) * | 2015-02-13 | 2015-05-27 | 江苏中丹集团股份有限公司 | Chemical industrial waste salt refining process |
| CN106745076A (en) * | 2016-11-21 | 2017-05-31 | 大唐国际化工技术研究院有限公司 | A kind of method that Industrial Wastewater Treatment is produced carnallite resource |
| CN108529652A (en) * | 2018-04-16 | 2018-09-14 | 黄河三角洲京博化工研究院有限公司 | A kind of industrial chlorinations sodium resource utilization process |
| CN108793199A (en) * | 2018-05-24 | 2018-11-13 | 汶川县湘宁氯酸盐有限责任公司 | A method of recycling sodium chloride in preparing potassium chlorate waste water |
| CN109704369A (en) * | 2019-03-08 | 2019-05-03 | 浙江申联环保集团有限公司 | A method of sodium sulphate is recycled using sulfur acid sodium waste salt dregs |
| CN109867296A (en) * | 2019-03-08 | 2019-06-11 | 浙江申联环保集团有限公司 | A kind of industrial chlorinations sodium waste salt dregs refining methd |
| CN109956484A (en) * | 2019-03-27 | 2019-07-02 | 河北科技大学 | Organic impurities removing means in a kind of chlorine chemical process byproduct sodium chloride salt |
| CN110451530A (en) * | 2019-08-16 | 2019-11-15 | 中国科学院过程工程研究所 | A kind of fine purification treatment process of industrial waste salt containing organic matter of desalinization of soil by flooding or leaching combination ex situ oxidation |
Non-Patent Citations (1)
| Title |
|---|
| 国家医药管理局科教司组编, 上海科学普及出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115350500A (en) * | 2022-08-23 | 2022-11-18 | 宁夏日盛高新产业股份有限公司 | Byproduct comprehensive utilization system in foaming agent production |
| CN115350500B (en) * | 2022-08-23 | 2023-10-13 | 宁夏日盛高新产业股份有限公司 | Byproduct comprehensive utilization system in foaming agent production |
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| CN110790286B (en) | 2023-07-04 |
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