CN211330697U - Sodium chlorate contains processing system of chromium salt mud - Google Patents
Sodium chlorate contains processing system of chromium salt mud Download PDFInfo
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- CN211330697U CN211330697U CN201922228422.5U CN201922228422U CN211330697U CN 211330697 U CN211330697 U CN 211330697U CN 201922228422 U CN201922228422 U CN 201922228422U CN 211330697 U CN211330697 U CN 211330697U
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Abstract
The utility model discloses a sodium chlorate contains processing system of chromium salt mud, it includes first chemical material jar, reation kettle, filter, second chemical material jar and centrifuge, the discharge gate of first chemical material jar passes through the pipeline with the import of batching pump and is connected, the export of batching pump passes through the pipeline with the feed inlet of reation kettle and is connected; a hydrochloric acid inlet and the like are arranged on the reaction kettle; the utility model discloses only need add the required raw materials hydrochloric acid of sodium chlorate production system, can retrieve the chromium in the salt mud that contains chromium, because not introducing new impurity, the chromium of retrieving returns sodium chlorate production system cyclic utilization, does not exert an influence to sodium chlorate production system, and then has reduced material cost.
Description
The technical field is as follows:
the utility model relates to a processing system who contains chromium salt mud especially relates to a processing system that sodium chlorate contains chromium salt mud.
Background art:
in the production process of sodium chlorate, sodium dichromate is added into a system for catalyzing main reaction, reducing the generation amount of oxygen, controlling the pH value in an electrolytic cell and removing perchlorate ions generated by electrolytic reaction; about 0.118kg of sodium dichromate is required to be added for each ton of sodium chlorate. Meanwhile, in the production process of sodium chlorate, in order to remove calcium ions, magnesium ions and sulfate ions in raw material salt, sodium hydroxide, sodium carbonate and calcium chloride are added into a production system to precipitate the calcium ions, the magnesium ions and the sulfate ions; in the process, chromium ions added in the production system enter a clarifier along with industrial wastewater in the form of sodium dichromate and calcium chromate to precipitate so as to form 'waste salt mud'. In a daler clarifier, white waste salt mud which takes calcium carbonate, sodium chloride and a small amount of calcium sulfate, calcium chromate and sodium chromate as main components is generated; in the sulphate clarifier, a yellow waste salty mud is produced, based on calcium sulphate, sodium chlorate, calcium chromate and small amounts of sodium chromate and calcium carbonate.
Generally, the chromium ions in the waste salt slurry are washed out and treated mainly by washing. However, because the existing forms of the chromium ions in the waste salt mud are various, including various forms such as free form, adsorption form and coating form, the chromium ions can only be removed by simply washing the waste salt mud, but the chromium ions existing in the adsorption form and the coating form cannot be removed; if chromium ions existing in the adsorption and packaging forms are not treated, residual Cr in the waste salt mud3+Can be oxidized into Cr again along with environmental change6+The chromium ions in the waste salt mud are difficult to detoxify and cannot be thoroughly removed, the surrounding ecological environment is continuously polluted, and great harm is caused to the ecological environment and the health of people.
Patent CN201710765313.X discloses a treatment process and a treatment system for waste salt mud in sodium chlorate production, wherein the treatment process needs to grind salt mud particles and add an oxidant to Cr3+Oxidation to Cr6+Then adding a stripping agent to the mixture to remove Cr6+Dissolving in solution, adding reducer to obtain Cr6+The chromium hydroxide is converted for recycling, the whole process is complex, and the operation process is not easy to control; meanwhile, the types of medicaments to be added are multiple, and the medicament cost and the equipment investment cost are increased.
The utility model has the following contents:
the utility model aims at providing a throw with the processing system that sodium chlorate contains chromate mud that the medicament kind is few, simple process, operation process control easily, raw and other materials input cost is low, chromate mud detoxification rate is high.
The purpose of the utility model is implemented by the following technical scheme: a treatment system for sodium chlorate and chromium-containing salt mud comprises a first chemical material tank, a reaction kettle, a filter, a second chemical material tank and a centrifugal machine, wherein a discharge port of the first chemical material tank is connected with an inlet of a batching pump through a pipeline, and an outlet of the batching pump is connected with a feed port of the reaction kettle through a pipeline; a hydrochloric acid inlet is formed in the reaction kettle; the discharge port of the reaction kettle is connected with the inlet of a feeding pump of the filter through a pipeline, and the outlet of the feeding pump of the filter is connected with the feed port of the filter through a pipeline; the water inlet of the filter is connected with the outlet of the water inlet pipeline; a washing water outlet of the filter is connected with a salt dissolving tank inlet of the sodium chlorate production system through a pipeline; a filter cake outlet of the filter is arranged above a feed inlet of the second material tank; the water inlet of the second material mixing tank is connected with the outlet of the water inlet pipeline; the outlet of the second chemical material tank is connected with the inlet of the filter cake dissolution returning pump through a pipeline, and the outlet of the filter cake dissolution returning pump is connected with the inlet of the centrifugal machine through a pipeline; and the filtrate outlet of the centrifuge is connected with the water inlet of the first material purifying tank through a pipeline.
Furthermore, a washing water outlet of the filter is connected with a water inlet of the filter through a pipeline.
The system for treating the sodium chlorate and chromium-containing salt mud further comprises a third material dissolving tank, wherein a solid waste residue outlet of the centrifugal machine is arranged above a feed inlet of the third material dissolving tank; the water inlet of the second material mixing tank is connected with the outlet of the water inlet pipeline; and the outlet of the third material melting tank is connected with the inlet of the filter cake return dissolution pump through a pipeline.
Further, an outlet of a steam pipeline is connected with a steam inlet of the reaction kettle, and a condensed water outlet of the reaction kettle is connected with a water inlet of the first material purifying tank through a pipeline; the outlet of the cooling water inlet pipeline is connected with the cooling water inlet of the reaction kettle, and the cooling water return port of the reaction kettle is connected with the inlet of the cooling water return pipeline.
Further, the filter is a belt type vacuum filter.
The utility model has the advantages that:
(1) the utility model can recycle the chromium in the chromium-containing salt mud only by adding the raw material hydrochloric acid required by the sodium chlorate production system, and the recycled chromium is returned to the sodium chlorate production system for cyclic utilization without influencing the sodium chlorate production system due to no introduction of new impurities, thereby reducing the raw material cost;
(2) the process steps are simple, the control is easy, excessive equipment is not required, and the equipment investment cost is reduced;
(3) and the hexavalent chromium and the washing water in the chromium-containing salt mud are recycled while the chromium mud is treated.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a system for treating chromate-containing sodium chlorate mud as in example 1.
The device comprises a first chemical material tank 1, a reaction kettle 2, a filter 3, a second chemical material tank 4, a centrifugal machine 5, a third chemical material tank 6, a hydrochloric acid adding port 7, a steam pipeline 8, a cooling water return pipeline 9, a water inlet pipeline 10, a chemical salt pool 11 of a sodium chlorate production system and a cooling water inlet pipeline 12.
The specific implementation mode is as follows:
example 1: as shown in fig. 1, a system for treating sodium chlorate and chromium salt mud comprises a first material purifying tank 1, a reaction kettle 2, a filter 3, a second material purifying tank 4, a centrifuge 5 and a third material purifying tank 6, wherein the filter 3 is a belt type vacuum filter. The discharge port of the first material purifying tank 1 is connected with the inlet of the batching pump through a pipeline, and the outlet of the batching pump is connected with the feed port of the reaction kettle 2 through a pipeline; a hydrochloric acid inlet 7 is arranged on the reaction kettle 2; an outlet of the steam pipeline 8 is connected with a steam inlet of the reaction kettle 2, and a condensed water outlet of the reaction kettle 2 is connected with a water inlet of the first material purifying tank 1 through a pipeline; the outlet of the cooling water inlet pipeline 12 is connected with the cooling water inlet of the reaction kettle 2, and the cooling water return port of the reaction kettle 2 is connected with the inlet of the cooling water return pipeline 9. The reaction kettle 2 is heated through a steam pipeline 8, and the reaction kettle 2 is cooled through a cooling pipeline. The discharge hole of the reaction kettle 2 is connected with the inlet of a feeding pump of the filter through a pipeline, and the outlet of the feeding pump of the filter is connected with the feed hole of the filter 3 through a pipeline; the water inlet of the filter 3 is connected with the outlet of the water inlet pipeline 10; the washing water outlet of the filter 3 is connected with the salt dissolving tank 11 inlet of the sodium chlorate production system through a pipeline; the washing water outlet of the filter 3 is connected with the water inlet of the filter 3 through a pipeline, and when the concentration of the washing water is low, the washing water returns to the filter 3 for recycling.
A filter cake outlet of the filter 3 is arranged above a feed inlet of the second chemical tank 4; the water inlet of the second compound material tank 4 is connected with the outlet of the water inlet pipeline 10; the outlet of the second compound material tank 4 is connected with the inlet of the filter cake return dissolution pump through a pipeline, and the outlet of the filter cake return dissolution pump is connected with the inlet of the centrifugal machine 5 through a pipeline; the filtrate outlet of the centrifuge 5 is connected with the water inlet of the first material purifying tank 1 through a pipeline.
A solid waste residue outlet of the centrifuge 5 is arranged above a feed inlet of the third material melting tank 6; the water inlet of the third material melting tank 6 is connected with the outlet of the water inlet pipeline 10; the outlet of the third material melting tank 6 is connected with the inlet of the filter cake return dissolution pump through a pipeline. Detecting solid waste slag discharged by the centrifuge 5, and discharging and burying the solid waste slag when the solid waste slag reaches a discharge standard; when the solid waste slag does not reach the discharge standard, the solid waste slag enters the third material melting tank 6, is added with water and is uniformly stirred, and then returns to the centrifugal machine 5 for centrifugal separation again until the solid waste slag discharged by the centrifugal machine 5 reaches the discharge standard, and is discharged to be buried.
The process for treating the sodium chlorate chromate-containing mud by using the system comprises the following steps:
(1) the chromium-containing salt slurry material comprises the following components: proportionally pumping the chromium-containing salt mud and water into a first material purifying tank 1 for mixing, and fully stirring and dissolving to obtain a chromium mud dissolving solution;
(2) detoxification of the chromium mud solution: the chromium mud solution is pumped into a reaction kettle 2, hydrochloric acid is added into the chromium mud solution, the solution is heated and is subjected to constant temperature for full reaction, then the temperature is naturally reduced, and the process of naturally reducing the temperature ensures that calcium sulfate crystals fully grow; the chromate ion is converted into dichromate ion under the strong acid condition, enters the solution and is crystallized to generate calcium sulfate crystal; the chromate ion adsorbed on the calcium sulfate is converted into dichromate under the strong acid condition by adding hydrochloric acid, and the adsorption is difficult again after the ion group becomes large, so that a large amount of chromate ion is transferred into the solution. Naturally cooling to make calcium sulfate crystal grow better and provide growth time and conditions. And adding hydrochloric acid into the chromium mud solution to adjust the pH value of the chromium mud solution.
(3) Cleaning and solid-liquid separation: pumping the solution obtained in the step (2) into a filter 3, wherein the filter 3 is a belt vacuum filter, performing suction filtration washing, cleaning and solid-liquid separation to obtain washing water and a filter cake, the separated washing water is sent to a salt dissolving tank 11 of a sodium chlorate production system and is used for dissolving salt in the sodium chlorate production system, and the filter cake is re-dissolved; the washing water contains hydrochloric acid, sodium chlorate, sodium chloride and sodium dichromate.
(4) Carrying out re-dissolution and solid-liquid separation on the filter cake: sending the filter cake into a second material tank 4, adding clear water according to a proportion, uniformly stirring, and then carrying out solid-liquid separation to obtain filtrate and solid waste residues; and (4) returning the filtrate to the first material purifying tank 1 in the step (1) for the chromium-containing salt slurry.
(5) Detecting solid waste residues: detecting the solid waste obtained in the step (3), and sending the solid waste to a common solid waste landfill for landfill after the detection is qualified; and (5) detecting that the product is unqualified, and repeating the operation in the step (3).
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The system for treating the chromium-containing sodium chlorate salt mud is characterized by comprising a first purifying tank, a reaction kettle, a filter, a second purifying tank and a centrifugal machine, wherein a discharge port of the first purifying tank is connected with an inlet of a batching pump through a pipeline, and an outlet of the batching pump is connected with a feed port of the reaction kettle through a pipeline; a hydrochloric acid inlet is formed in the reaction kettle; the discharge port of the reaction kettle is connected with the inlet of a feeding pump of the filter through a pipeline, and the outlet of the feeding pump of the filter is connected with the feed port of the filter through a pipeline; the water inlet of the filter is connected with the outlet of the water inlet pipeline; a washing water outlet of the filter is connected with a salt dissolving tank inlet of the sodium chlorate production system through a pipeline; a filter cake outlet of the filter is arranged above a feed inlet of the second material tank; the water inlet of the second material mixing tank is connected with the outlet of the water inlet pipeline; the outlet of the second chemical material tank is connected with the inlet of the filter cake dissolution returning pump through a pipeline, and the outlet of the filter cake dissolution returning pump is connected with the inlet of the centrifugal machine through a pipeline; and the filtrate outlet of the centrifuge is connected with the water inlet of the first material purifying tank through a pipeline.
2. The system for treating the sodium chlorate and chromium salt contained mud as claimed in claim 1, wherein the washing water outlet of the filter is connected with the water inlet of the filter through a pipeline.
3. The system for treating the sodium chlorate containing chromium salt mud of claim 1, further comprising a third material dissolving tank, wherein a solid waste residue outlet of the centrifuge is arranged above a feed inlet of the third material dissolving tank; the water inlet of the second material mixing tank is connected with the outlet of the water inlet pipeline; and the outlet of the third material melting tank is connected with the inlet of the filter cake return dissolution pump through a pipeline.
4. The system for treating the sodium chlorate containing chromium salt mud as claimed in claim 1, wherein an outlet of a steam pipeline is connected with a steam inlet of the reaction kettle, and a condensed water outlet of the reaction kettle is connected with a water inlet of the first chemical material tank through a pipeline; the outlet of the cooling water inlet pipeline is connected with the cooling water inlet of the reaction kettle, and the cooling water return port of the reaction kettle is connected with the inlet of the cooling water return pipeline.
5. The system for treating sodium chlorate and chromium containing salt mud of claim 1, wherein the filter is a belt vacuum filter.
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| CN201922228422.5U CN211330697U (en) | 2019-12-12 | 2019-12-12 | Sodium chlorate contains processing system of chromium salt mud |
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| CN201922228422.5U CN211330697U (en) | 2019-12-12 | 2019-12-12 | Sodium chlorate contains processing system of chromium salt mud |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429896A (en) * | 2020-10-29 | 2021-03-02 | 河南佰利联新材料有限公司 | Treatment method of salt mud produced in chlor-alkali production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429896A (en) * | 2020-10-29 | 2021-03-02 | 河南佰利联新材料有限公司 | Treatment method of salt mud produced in chlor-alkali production |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 750336 Helan District, Alashan Economic Development Zone, Alashan League, Inner Mongolia Autonomous Region Patentee after: China Salt Inner Mongolia Chemical Co.,Ltd. Patentee after: INNER MONGOLIA LANTAI SODIUM INDUSTRY Co.,Ltd. Address before: 750336 Helan District, Alashan Economic Development Zone, Alashan League, Inner Mongolia Autonomous Region Patentee before: INNER MONGOLIA LANTAI INDUSTRIAL Co.,Ltd. Patentee before: INNER MONGOLIA LANTAI SODIUM INDUSTRY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210926 Address after: 750336 south of Ulanbuhe street, Alxa Economic Development Zone, Alxa League, Inner Mongolia Autonomous Region (WuSitai town) Patentee after: INNER MONGOLIA LANTAI SODIUM INDUSTRY Co.,Ltd. Patentee after: China Salt Inner Mongolia Chemical Co.,Ltd. Address before: 750336 Helan District, Alashan Economic Development Zone, Alashan League, Inner Mongolia Autonomous Region Patentee before: China Salt Inner Mongolia Chemical Co.,Ltd. Patentee before: INNER MONGOLIA LANTAI SODIUM INDUSTRY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 750336 south of Ulanbuhe street, Alxa Economic Development Zone, Alxa League, Inner Mongolia Autonomous Region (WuSitai town) Patentee after: China Salt Inner Mongolia Chemical sodium Industry Co.,Ltd. Patentee after: China Salt Inner Mongolia Chemical Co.,Ltd. Address before: 750336 south of Ulanbuhe street, Alxa Economic Development Zone, Alxa League, Inner Mongolia Autonomous Region (WuSitai town) Patentee before: INNER MONGOLIA LANTAI SODIUM INDUSTRY Co.,Ltd. Patentee before: China Salt Inner Mongolia Chemical Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |