Device for removing inorganic impurities from brine subjected to thermochemical treatment

Abstract

The utility model discloses a device for removing inorganic impurities from saline water subjected to thermochemical treatment, which belongs to the technical field of chemical engineering, aims at solving the problems of low treatment efficiency, complicated operation and high cost, and comprises a saline water storage tank, a raw material pump, a clean saline water storage tank, a finished product pump and a wastewater collecting tank, the chemical reaction unit is connected with a filtering unit through a pipeline, the filtering unit is connected with a wastewater collecting tank, and the filtering unit is provided with a circulating system through a pipeline; through cooperation of the chemical reaction unit, the coarse filter and the fine filter, inorganic impurities in saline water are efficiently removed, the quality of the saline water is improved, meanwhile, continuous treatment of the saline water is achieved by introducing the circulating system, and compared with a traditional intermittent treatment mode, continuous treatment not only improves the treatment efficiency, but also reduces the treatment cost. And the operation cost is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical engineering, and particularly relates to a device for removing inorganic impurities from brine after thermochemical treatment. Background Art

[0002] In the process of chemical production, brine treatment is an important link. Inorganic impurities such as calcium and magnesium ions in brine will seriously affect the quality of brine and the progress of subsequent processes.

[0003] At present, the existing caustic soda production technology mainly uses the ion-exchange membrane process. For example, Chinese Patent No. CN116351849A discloses a non-catalytic thermochemical treatment method and device for chemical waste salt, which relates to the technical field of chemical waste salt treatment. In the method of this application, in an anaerobic or anoxic environment, the waste salt feed is heated to 550-1000 °C within 0-10 s to obtain a secondary feed and volatiles; in an oxidative reaction atmosphere, the secondary feed and volatiles are kept at 550-1000 °C for 10-180 min to obtain a tertiary feed and flue gas; the flue gas is kept at 1100-1200 °C for 2-5 s to obtain flue gas discharge; the tertiary feed is cooled to 200-400 °C to obtain crude salt discharge; and then flue gas treatment and crude salt discharge treatment are carried out.

[0004] The existing technology is divided into processes such as primary brine, secondary brine purification, electrolysis, dechlorination of dilute brine, Cl2 treatment, and H2 treatment in sequence. The core processes are secondary brine purification and electrolysis parts. As Figure 1 shown in the schematic diagram of the existing technology process flow, by adding a refining reagent to saturated crude brine, after the refining reaction, a flocculant is added and then enters a clarifying tank for clarification. The clarified brine is roughly filtered by a sand filter and then secondary filtered by an α-cellulose pre-coated carbon tube filter to make the suspended matter in the brine less than 1×10 －6 , and then enters an ion exchange resin tower for secondary purification to obtain refined brine that meets the operating requirements of the ion-exchange membrane electrolyzer. Although this process flow has achieved certain effects, there are problems such as low treatment efficiency, complex operation, and high cost.

[0005] Therefore, there is a need for an efficient and economical device for removing inorganic impurities from brine to solve the problems of low treatment efficiency, complex operation, and high cost existing in the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a device for removing inorganic impurities from brine after thermochemical treatment to solve the problems put forward in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: A device for removing inorganic impurities from brine after thermochemical treatment, comprising a brine storage tank, a raw material pump, a clean brine storage tank, a finished product pump and a waste water collection tank. The raw material pump is connected to a chemical reaction unit through a pipeline. The chemical reaction unit is connected to a filtration unit through a pipeline. The filtration unit is connected to the waste water collection tank, and a circulation system is provided through a pipeline on the filtration unit. The filtration unit is connected to the clean brine storage tank through a pipeline, and the clean brine storage tank is connected to the finished product pump.

[0008] It should be noted in the solution that the chemical reaction unit includes a reactor, a heater and an adder. The heater is installed on the reactor, and the adder is communicated with the reactor.

[0009] It is further worth noting that the filtration unit includes a coarse filter and a fine filter. The coarse filter and the fine filter are connected and connected after the chemical reaction unit.

[0010] It is further necessary to note that the circulation system includes a circulation pump and a circulation pipeline. The circulation pipeline is connected to the circulation pump and is connected after the filtration unit and communicated with the chemical reaction unit.

[0011] As a preferred implementation manner, the waste water collection tank is connected to the filtration unit, and a waste water treatment system is provided in the waste water collection tank.

[0012] Compared with the prior art, a device for removing inorganic impurities from brine after thermochemical treatment provided by the present utility model has at least the following beneficial effects:

[0013] Through the cooperation of the chemical reaction unit, the coarse filter and the fine filter, the efficient removal of inorganic impurities in the brine is realized, and the quality of the brine is improved. At the same time, by introducing the circulation system, the continuous treatment of the brine is realized. Compared with the traditional batch treatment method, continuous treatment not only improves the treatment efficiency but also reduces the operation cost. And by efficiently removing the inorganic impurities in the brine, the quality requirements of the brine for subsequent processes can be met. At the same time, the introduction of the circulation system also reduces the energy consumption and waste emissions, which conforms to the concept of green chemical industry and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the brine refining process flow in the prior art;

[0015] Figure 2 It is a schematic diagram of the process flow of the present utility model.

[0016] In the figure: 1. Brine storage tank; 2. Feed pump; 3. Chemical reaction unit; 301. Reactor; 302. Heater; 303. Adder; 4. Coarse filter; 5. Fine filter; 6. Clean brine storage tank; 7. Product pump; 8. Circulation pump; 801. Circulation pipeline; 9. Wastewater collection tank; 91. Wastewater treatment system. Detailed implementation manners

[0017] The following further describes the present utility model in conjunction with embodiments.

[0018] Please refer to Figure 2 , the present utility model provides a device for removing inorganic impurities from brine after thermochemical treatment, including a brine storage tank 1, a feed pump 2, a clean brine storage tank 6, a product pump 7 and a wastewater collection tank 9. The feed pump 2 is connected to a chemical reaction unit 3 through a pipeline. The chemical reaction unit 3 is connected to a filtration unit through a pipeline. The filtration unit is connected to the wastewater collection tank 9, and a circulation system is provided through a pipeline for the filtration unit. The filtration unit is connected to the clean brine storage tank 6 through a pipeline, and the clean brine storage tank 6 is connected to the product pump 7.

[0019] First, the brine to be treated is introduced into the chemical reaction unit 3. Through heating and chemical reactions, the inorganic impurities are converted into forms that are easy to remove. Then, the treated brine is introduced into the filtration unit to filter out the inorganic impurities. Finally, through the circulation system, the treated brine is circulated back to the chemical reaction unit 3 to achieve continuous treatment.

[0020] Furthermore, as Figure 2 shown, it is specifically noted that the chemical reaction unit 3 includes a reactor 301, a heater 302 and an adder 303. The heater 302 is installed on the reactor 301, and the adder 303 is connected to the reactor 301.

[0021] First, the heater 302 is used to heat the brine to reach a predetermined reaction temperature. At this temperature, the inorganic impurities in the brine react chemically with the added chemical reagents and are converted into forms that are easy to remove. Specifically, for some inorganic impurities, by adding specific reagents, they can precipitate or be converted into gases under heating conditions. For example, for hard water components such as calcium ions and magnesium ions, by adding reagents such as lime or soda, they can be converted into precipitates, and these precipitates can then be removed from the brine by filtration or sedimentation. At the same time, the chemical reaction unit 3 can also control the reaction conditions, such as temperature, pressure, reaction time, etc., to optimize the reaction effect and ensure the efficient conversion of inorganic impurities.

[0022] Furthermore, as Figure 2As shown, it is worth specifically explaining that the filtration unit includes a coarse filter 4 and a fine filter 5. The coarse filter 4 and the fine filter 5 are connected and connected after the chemical reaction unit 3.

[0023] First, it passes through the coarse filter 4 to remove larger particles and sediments. Then, the brine enters the fine filter 5 to further remove tiny particles and residues. Through the successive interception of these filters, it can be ensured that the impurities in the brine are effectively removed. The filtration unit is also equipped with a backwashing system for regularly cleaning the filters to prevent clogging and reduce the filtration efficiency.

[0024] Furthermore, as Figure 2 shown, it is worth specifically explaining that the circulation system includes a circulation pump 8 and a circulation pipeline 801. The circulation pipeline 801 is connected to the circulation pump 8 and is connected after the filtration unit and communicated with the chemical reaction unit 3.

[0025] After the filtration unit completes the filtration task, the circulation pump 8 transports the treated brine back to the chemical reaction unit 3 through the circulation pipeline 801. During this process, the flow direction and flow rate of the brine are controlled by valves to ensure the stable circulation of the brine. Through the continuous operation of the circulation system, the device can achieve the continuous treatment of the brine, improving the treatment efficiency. At the same time, the circulation system can also adjust the circulation speed and flow rate according to actual needs to meet different treatment requirements.

[0026] Furthermore, as Figure 2 shown, it is worth specifically explaining that the wastewater collection tank 9 is connected to the filtration unit, and a wastewater treatment system 91 is provided in the wastewater collection tank 9.

[0027] The wastewater generated during the treatment process is collected in the wastewater collection tank 9. The wastewater collection tank 9 should be equipped with a liquid level monitoring device and a discharge valve to discharge and treat the wastewater in a timely manner. The wastewater treatment system 91 includes treatment equipment such as a sedimentation tank and a neutralization tank. Through processes such as sedimentation and neutralization, the harmful substances in the wastewater are removed or reduced to below the environmental protection discharge standards. The treated wastewater can be safely discharged or further recycled.

[0028] This solution has the following working process: When this device is in use, first, the brine to be processed is pumped from the brine storage tank 1 by the feed pump 2 and transported to the chemical reaction unit 3. In the chemical reaction unit 3, the brine is heated to a predetermined reaction temperature and specific chemical reagents are added. These chemical reagents react with the inorganic impurities in the brine and convert them into forms that are easy to remove. Subsequently, the brine that has undergone the chemical reaction enters the filtration unit. In the filtration unit, through multi-stage filtration by the coarse filter 4 and the fine filter 5, the particles and residues in the brine are removed, making the brine meet the cleaning standard. The filtered clean brine is collected in the clean brine storage tank 6. According to the demand, it can be pumped out by the finished product pump 7 for subsequent use. At the same time, in order to achieve continuous processing, part of the clean brine is pumped back by the circulation pump 8 and re-enters the chemical reaction unit 3 for a new round of processing. During the processing, the generated wastewater is collected in the wastewater collection tank 9 and is appropriately treated by the wastewater treatment system 91 to meet the environmental protection discharge standard. The entire operation process is monitored and adjusted in real time through the control system, ensuring the stability and efficiency of the processing. The operator can remotely monitor and operate the processing process through the control system, improving the convenience and processing efficiency of the operation. Through such an operation process, this device can effectively remove the inorganic impurities in the brine, improve the quality of the brine, and achieve continuous processing, reducing the operation cost.

[0029] In summary: Through the cooperation of the chemical reaction unit 3, the coarse filter 4 and the fine filter 5, the efficient removal of inorganic impurities in the brine is achieved, improving the quality of the brine. At the same time, by introducing the circulation system, the continuous processing of the brine is realized. Compared with the traditional batch processing method, continuous processing not only improves the processing efficiency but also reduces the operation cost. Moreover, by efficiently removing the inorganic impurities in the brine, the quality requirements of the brine for subsequent processes can be met. At the same time, the introduction of the circulation system also reduces energy consumption and waste emissions, conforming to the concepts of green chemistry and sustainable development.

Claims

1. A device for removing inorganic impurities from brine after thermochemical treatment, comprising a brine storage tank (1), a raw material pump (2), a clean brine storage tank (6), a finished product pump (7) and a wastewater collection tank (9), characterized in that: The raw material pump (2) is connected to a chemical reaction unit (3) via a pipeline, the chemical reaction unit (3) is connected to a filter unit via a pipeline, the filter unit is connected to a wastewater collection tank (9), and the filter unit is provided with a circulation system via a pipeline, the filter unit is connected to a clean brine storage tank (6) via a pipeline, and the clean brine storage tank (6) is connected to a finished product pump (7).

2. The device for removing inorganic impurities from brine after thermochemical treatment according to claim 1, characterized in that: The chemical reaction unit (3) comprises a reactor (301), a heater (302) and an additive (303), wherein the heater (302) is installed on the reactor (301), and the additive (303) is connected to the reactor (301).

3. The device for removing inorganic impurities from brine after thermochemical treatment according to claim 1, characterized in that: The filtering unit comprises a coarse filter (4) and a fine filter (5), wherein the coarse filter (4) and the fine filter (5) are connected to each other and connected after the chemical reaction unit (3).

4. The device for removing inorganic impurities from brine after thermochemical treatment according to claim 1, characterized in that: The circulation system comprises a circulation pump (8) and a circulation pipeline (801), wherein the circulation pipeline (801) is connected to the circulation pump (8) and connected to the filtering unit and then connected to the chemical reaction unit (3).

5. The device for removing inorganic impurities from brine after thermochemical treatment according to claim 1, characterized in that: The wastewater collection tank (9) is connected to the filtering unit, and a wastewater treatment system (91) is arranged in the wastewater collection tank (9).

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