CN210885669U - Evaporative crystallization ammonium sulfate concentrated mother liquor processing system - Google Patents
Evaporative crystallization ammonium sulfate concentrated mother liquor processing system Download PDFInfo
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- CN210885669U CN210885669U CN201921745184.9U CN201921745184U CN210885669U CN 210885669 U CN210885669 U CN 210885669U CN 201921745184 U CN201921745184 U CN 201921745184U CN 210885669 U CN210885669 U CN 210885669U
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Abstract
A processing system for concentrated mother liquor of ammonium sulfate by evaporative crystallization comprises a cooling ablation device, a chloride processing device and a heavy metal impurity processing device; the temperature-reducing ablation device comprises a temperature-reducing ablation tank and a first pressure filter, wherein the outlet of the temperature-reducing ablation tank is connected with the inlet of the first pressure filter, and the outlet of the first pressure filter is connected with the inlet of the first storage tank; the chloride treatment device comprises a first reaction tank and a second pressure filter, wherein an outlet of the first storage tank is connected with an inlet of the first reaction tank, an outlet of the first reaction tank is connected with an inlet of the second pressure filter, and an outlet of the second pressure filter is connected with an inlet of the second storage tank; the heavy metal impurity treatment device comprises a second reaction tank, a filter and a finished product storage tank, wherein an outlet of the second storage tank is connected with an inlet of the second reaction tank, and an outlet of the second reaction tank is connected with the finished product storage tank through the filter. The utility model discloses a be used for handling the concentrated mother liquor of ammonium sulfate, after getting rid of chloride impurity and heavy metal impurity, return the evaporative crystallization system again and handle high energy consumption, the difficult problem of handling of the ammonium sulfate waste salt of output as raw materials output ammonium sulfate, solution ammonium sulfate concentrate mother liquor now.
Description
Technical Field
The utility model belongs to lead acid battery retrieves the field, particularly, relates to a concentrated mother liquor processing system of evaporation crystallization ammonium sulfate.
Background
Reasons for generating ammonium sulfate concentrated mother liquor are as follows:
the first reason is as follows: the boiling point is raised. The desulfurization filtrate generated by the desulfurization of the lead plaster is used for evaporation concentration crystallization of an evaporation crystallization system, chloride impurities are enriched in the mother liquor along with the evaporation concentration crystallization, and the chloride in the mother liquor reaches thousands of ppm along with continuous enrichment. The chlorine impurity is too high, so that the boiling point of the mother liquor is increased, and the mother liquor cannot reach the boiling point due to the limited heating temperature of the evaporative crystallization system, so that the efficiency of the evaporative crystallization system is reduced, and the crystallization mother liquor needs to be discharged.
The second reason is that: the impurities of the ammonium sulfate product exceed the standard. Evaporative crystallization ammonium sulfate desulfurization filtrate, because heavy metal impurity accumulates in the mother liquor, constantly risees, heavy metal impurity rises in the evaporation mother liquor, leads to the ammonium sulfate solid heavy metal impurity liquid of evaporative crystallization output to rise, and along with production goes on, final ammonium sulfate solid metal impurity will exceed standard, must arrange outward evaporative crystallization mother liquor. Meanwhile, the impurities in the mother liquor are too high, so that the ammonium sulfate solid cannot form large-particle grains, the ammonium sulfate grains are too small, fine grains cannot be separated, the ammonium sulfate always circulates in the system, the evaporative crystallization system is free of the production of ammonium sulfate solid materials, the grains are too small, powder pollution is caused, and the field operation environment is influenced.
The ammonium sulfate concentrated mother liquor treatment method comprises the following steps: at present, the concentrated ammonium sulfate mother liquor is treated by an evaporation reaction kettle, the waste ammonium sulfate salt which is finally formed contains high heavy metal impurities and is dangerous waste, and the energy consumption of the evaporation reaction kettle for treating the concentrated ammonium sulfate mother liquor is high.
Disclosure of Invention
The utility model aims at overcoming prior art's the above-mentioned not enough, and provide a concentrated mother liquor processing system of evaporation crystallization ammonium sulfate, adopt lead plaster oxidation adsorption to get rid of concentrated mother liquor chloride, can make the chloride fall to below 200ppm by thousands ppm, can be with heavy metal impurity total amount control below 5ppm, the concentrate after handling can get into the evaporation crystal system, produces qualified ammonium sulfate solid.
The technical scheme of the utility model is that: the method comprises the following steps: a cooling ablation device, a chloride treatment device and a heavy metal impurity treatment device; the temperature-reducing ablation device is connected with a chloride treatment device through a first storage tank, and the chloride treatment device is connected with a heavy metal impurity treatment device through a second storage tank;
the temperature-reducing ablation device comprises a temperature-reducing ablation tank and a first pressure filter, wherein an outlet of the temperature-reducing ablation tank is connected with an inlet of the first pressure filter, and an outlet of the first pressure filter is connected with an inlet of the first storage tank; the concentrated mother liquor in the evaporative crystallization system is high-temperature and contains solids, the solids are ammonium sulfate solids, the concentrated mother liquor is completely dissolved by adding dilute ammonium sulfate solution or water into a cooling melting tank, and a first filter press is used for separating insoluble substances in the concentrated mother liquor;
the chloride treatment device comprises a first reaction tank and a second pressure filter, wherein an outlet of the first storage tank is connected with an inlet of the first reaction tank, an outlet of the first reaction tank is connected with an inlet of the second pressure filter, and an outlet of the second pressure filter is connected with an inlet of the second storage tank; the second filter press is used for separating lead plaster;
the heavy metal impurity treatment device comprises a second reaction tank, a filter and a finished product storage tank, wherein an outlet of the second storage tank is connected with an inlet of the second reaction tank, and an outlet of the second reaction tank is connected with the finished product storage tank through the filter. The filter is used for removing heavy metal precipitates generated by the reaction of the heavy metal trapping agent.
Lead paste is put into the first reaction tank to remove chloride impurities in the concentrated ammonium sulfate mother liquor through oxidation adsorption, and the amount of the lead paste put into each kilogram of the concentrated ammonium sulfate mother liquor is 0.5-1 kg.
And a heavy metal trapping agent is added into the second reaction tank, and the heavy metal trapping agent is organic sulfur.
And corrosion-resistant pumps are arranged between the cooling ablation tank and the first pressure filter, between the first storage tank and the first reaction tank, between the first reaction tank and the second pressure filter, between the second storage tank and the second reaction tank and between the second reaction tank and the filter.
The concentrated mother liquor is the concentrated mother liquor generated by evaporating and crystallizing the desulfurization filtrate, the desulfurization filtrate is ammonium sulfate filtrate generated by ammonium bicarbonate desulfurization lead plaster, and high-content chloride impurities and heavy metal impurities in the concentrated mother liquor need to be removed. Adopt the desulfurization diachylon of broken system output and the reaction of concentrate mother liquor to get rid of the chloride, chloride carries out the oxidation and adsorbs in the concentrate mother liquor, chloride impurity can fall to below 200ppm, former concentrate mother liquor boiling point has been reduced, it is too high because of the boiling point to have solved concentrate mother liquor, the problem of evaporation efficiency low, heavy metal impurity in the concentrate mother liquor is got rid of to the heavy metal trapping agent of rethread, it is qualified to make evaporation crystallization output ammonium sulfate heavy metal impurity, through the getting rid of chloride and heavy metal impurity, the concentrated mother liquor of ammonium sulfate can return the evaporative crystallization system and handle. The utility model discloses a can be used to handle the concentrated mother liquor of ammonium sulfate, get rid of behind chloride impurity and the heavy metal impurity through this system, return the evaporative crystallization system again and handle high energy consumption, the ammonium sulfate waste salt problem of difficultly handling of output as raw materials output ammonium sulfate, solved present ammonium sulfate concentrate mother liquor.
Drawings
FIG. 1 is a flow diagram of the apparatus of the present invention;
in the figure: 1-cooling ablation tank, 2-filter press 1, 3-storage tank 1, 4-reaction tank 1, 5-filter press 2, 6-storage tank 2, 7-reaction tank 2, 8-filter and 9-finished product storage tank.
Detailed Description
In fig. 1, the utility model discloses a cooling ablator, pressure filter 1, storage tank 1, retort 1, pressure filter 2, storage tank 2, retort 2, filter, finished product storage tank, cooling ablator in proper order with pressure filter 1, storage tank 1, retort 1, pressure filter 2, storage tank 2, retort 2, filter, finished product storage tank pass through the pipeline and connect, and solution passes through corrosion-resistant pump as transport power between each equipment.
The reaction tank 1 is used for removing the chloride of the concentrated mother liquor, and preferably, the removal method adopts lead plaster to carry out stirring reaction under the weak acid condition. The reaction tank 2 is used for removing heavy metal impurities in the concentrated mother liquor, and preferably, the heavy metal impurities are removed by adding a heavy metal trapping agent, wherein the used heavy metal trapping agent is organic sulfur. The filter can be a filter press or a ceramic membrane for filtering, and insoluble substances generated by the reaction are removed. And materials in each storage tank or reaction tank are transferred out and conveyed to the next connected equipment through the corrosion-resistant pump. Filter cakes of the filter press 1 and the filter press 2 are treated as smelting raw materials of the converter. After the crystallized concentrated mother liquor is treated by the system, heavy metal impurities lead which are difficult to treat can be treated to be less than 0.5ppm and cadmium can be treated to be less than 0.01ppm, the problem of impurity enrichment of the concentrated mother liquor is solved, chloride in the concentrated mother liquor can be oxidized and adsorbed, chloride impurities can be reduced to be less than 200ppm, so that the concentrated mother liquor of ammonium sulfate can enter an evaporation crystallization system for treatment, if the method for treating the concentrated mother liquor of ammonium sulfate by adopting the existing evaporation reaction kettle is adopted, the problems of high energy consumption and difficult treatment of produced waste salt can occur, the concentrated mother liquor of ammonium sulfate can be treated by the method, and the produced ammonium sulfate solid can be sold for value.
Claims (4)
1. The utility model provides an evaporation crystallization ammonium sulfate concentrate mother liquor processing system which characterized in that: the method comprises the following steps: a cooling ablation device, a chloride treatment device and a heavy metal impurity treatment device; the temperature-reducing ablation device is connected with a chloride treatment device through a first storage tank (3), and the chloride treatment device is connected with a heavy metal impurity treatment device through a second storage tank (6);
the temperature-reducing ablation device comprises a temperature-reducing ablation tank (1) and a first filter press (2), wherein an outlet of the temperature-reducing ablation tank (1) is connected with an inlet of the first filter press (2), and an outlet of the first filter press (2) is connected with an inlet of a first storage tank (3);
the chloride treatment device comprises a first reaction tank (4) and a second filter press (5), wherein an outlet of the first storage tank (3) is connected with an inlet of the first reaction tank (4), an outlet of the first reaction tank (4) is connected with an inlet of the second filter press (5), and an outlet of the second filter press (5) is connected with an inlet of the second storage tank (6);
heavy metal impurity processing apparatus includes retort two (7), filter (8), finished product storage tank (9), and storage tank two (6) export and retort two (7) access connection, and retort two (7) export is connected with finished product storage tank (9) through filter (8).
2. The system for processing an evaporative crystallization ammonium sulfate concentrated mother liquor as claimed in claim 1, wherein: and lead plaster for removing chloride is put into the reaction tank I (4).
3. The system for processing an evaporative crystallization ammonium sulfate concentrated mother liquor as claimed in claim 1, wherein: and a heavy metal trapping agent is added into the second reaction tank (7), and the heavy metal trapping agent is organic sulfur.
4. The system for processing an evaporative crystallization ammonium sulfate concentrated mother liquor as claimed in claim 1, wherein: and corrosion-resistant pumps are arranged between the cooling ablation tank (1) and the first filter press (2), between the first storage tank (3) and the first reaction tank (4), between the first reaction tank (4) and the second filter press (5), between the second storage tank (6) and the second reaction tank (7) and between the second reaction tank (7) and the filter (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921745184.9U CN210885669U (en) | 2019-10-17 | 2019-10-17 | Evaporative crystallization ammonium sulfate concentrated mother liquor processing system |
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| CN201921745184.9U CN210885669U (en) | 2019-10-17 | 2019-10-17 | Evaporative crystallization ammonium sulfate concentrated mother liquor processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644421A (en) * | 2022-03-18 | 2022-06-21 | 济南山源环保科技有限公司 | Method for reducing multi-effect flash evaporation boiling point rise of desulfurization wastewater |
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2019
- 2019-10-17 CN CN201921745184.9U patent/CN210885669U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644421A (en) * | 2022-03-18 | 2022-06-21 | 济南山源环保科技有限公司 | Method for reducing multi-effect flash evaporation boiling point rise of desulfurization wastewater |
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