Alkali washing treatment device for acidic materials
The alkaline washing treatment device of acidic materials with closed-loop circulation reaction solves the problems of insufficient mixing of alkali and acidic materials and decomposition of sodium hypochlorite, and achieves efficient and safe alkali washing treatment, reducing costs and environmental risks.
Patent Information
- Application Number
- CN202422252360.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the traditional alkaline washing method, the alkali liquid and acidic materials are not mixed sufficiently, the sodium hypochlorite is unstable decomposition, and the diffusion of chlorine gas leads to low treatment efficiency and environmental pollution, and high cost.
The alkaline washing treatment device of acidic materials with closed-loop circulation reaction is adopted, including an alkaline kettle, a mixer and a cooler. The alkaline circulation pump and high-efficiency cooling technology ensure that the alkaline liquid and the acidic materials are fully mixed and the reaction temperature is controlled, and sodium hypochlorite is generated and then left to stand and layered.
It improves the treatment efficiency, reduces the decomposition of sodium hypochlorite, reduces operating costs, complies with environmental protection requirements, and avoids safety accidents.
Smart Images
Figure CN223184558U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of material processing devices in chemical production, in particular to an alkali washing processing device for acidic materials. Background Art
[0002] The chemical industry, particularly in the production of chlorine-based chemicals, such as R113a, often produces large quantities of acidic materials containing high concentrations of chlorine molecules. If not properly handled, these materials can not only adversely affect subsequent processes but also pose a serious threat to the environment and operators. Therefore, effective alkaline cleaning of these acidic materials is crucial.
[0003] However, traditional alkaline cleaning uses a tower-type alkaline cleaning process, where the alkaline solution and the material flow in opposite directions. The alkaline solution and the material are fully mixed and neutralized to synthesize a neutral material from the acidic material. However, these alkaline cleaning methods often have many limitations. On the one hand, the insufficient mixing of the alkaline solution and the acidic material leads to incomplete reaction, which affects the treatment effect. On the other hand, the sodium hypochlorite produced during the reaction is easily decomposed in a high-temperature environment, forming by-products such as sodium chloride, which increases the complexity and cost of wastewater treatment. In addition, the diffusion problem of chlorine molecules is one of the difficulties that traditional alkaline cleaning methods are difficult to overcome. It not only reduces treatment efficiency but also may pollute the production environment.
[0004] Especially in the production of R113a, the acidic material contains a large amount of chlorine molecules. After mixing with alkaline solution, the chlorine molecules react to form sodium hypochlorite. Sodium hypochlorite is unstable and easily decomposes at high temperatures to form sodium chloride, which becomes wastewater. Because it contains chlorine, the treatment cost is relatively high.
[0005] The traditional alkaline neutralization reaction formula is: NaOH+Cl2→NaClO+HCl; 2NaClO→2NaCl+O2↑. Utility Model Content
[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art, provide an alkali washing treatment device for acidic materials, implement closed-loop circulation reaction, reduce the diffusion of chlorine, recover sodium hypochlorite, and reduce costs and increase efficiency.
[0007] The alkali washing treatment device for acidic materials described in the utility model comprises an alkali dissolving kettle, a mixer, and a cooler. The mixer is provided with an acidic material feeding pipe, the alkali dissolving kettle is connected to an alkali circulation pump, the alkali circulation pump is connected to the cooler, the cooler is connected to the mixer, and the mixer is connected to the alkali dissolving kettle.
[0008] Preferably, the alkali dissolving kettle is provided with a feed pipe.
[0009] Preferably, a discharge pipe is connected to the pipeline connecting the alkali dissolving kettle and the alkali circulation pump.
[0010] Preferably, the cooler is equipped with a refrigerant feed pipe and a refrigerant discharge pipe. The cooler utilizes efficient heat exchange technology, combined with the refrigerant feed pipe and the refrigerant discharge pipe, to achieve rapid and uniform cooling. A -10°C refrigerant is used to cool the alkali solution.
[0011] Preferably, the acidic material feed pipe is provided with an acidic material feed valve.
[0012] The alkali washing treatment device for acidic materials described in the utility model is configured to inject alkali solution into the alkali dissolving kettle before starting the device, and at the same time check the refrigerant system of the cooler. After starting, the alkali solution circulates under the drive of the alkali circulation pump and is cooled by the cooler to reduce the decomposition of sodium hypochlorite due to high temperature. Subsequently, the acidic material is precisely controlled by the acidic material feed valve and added to the mixer to mix and react with the cooled alkali solution. The mixer ensures that the materials are evenly mixed, and the generated neutral materials and sodium hypochlorite continue to be cooled as they circulate. After the reaction, the alkali circulation pump is stopped, and the materials in the alkali dissolving kettle are allowed to stand still, and the materials and alkali solution are separated into layers. After sufficient standing and separation, the neutral materials at the bottom are discharged into the crude product tank through the discharge pipe, and the remaining alkali solution is recycled. After sampling and analysis, the alkali concentration is less than 4%, and the alkali solution is discharged into the sodium hypochlorite storage tank.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] (1) The alkaline washing treatment device for acidic materials of the present invention ensures sufficient mixing and uniform reaction of chlorine material and alkaline solution by optimizing the mixer design and adopting efficient cooling technology, thereby significantly improving the treatment efficiency. At the same time, the closed-loop treatment system reduces the operational risk and effectively avoids safety accidents caused by reaction out of control or leakage.
[0015] (2) The alkaline washing treatment device for acidic materials of the present invention controls the dosage of acidic materials and the reaction temperature through a mixer, thereby reducing the use of excessive alkali solution and the decomposition of sodium hypochlorite, and converting wastewater into sodium hypochlorite as a by-product, thereby reducing operating costs, meeting environmental protection requirements, and making positive contributions to the sustainable development of enterprises and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the alkaline washing treatment device for acidic materials of the present invention.
[0017] In the figure: 1. Alkali dissolving kettle; 2. Mixer; 3. Feed pipe; 4. Discharge pipe; 5. Alkali circulation pump; 6. Acidic material feed pipe; 7. Acidic material feed valve; 8. Cooler; 9. Refrigerant feed pipe; 10. Refrigerant discharge pipe. DETAILED DESCRIPTION
[0018] The present invention will be further described below with reference to specific embodiments.
[0019] like Figure 1 As shown, the alkali washing treatment device for the acidic material comprises an alkali dissolving kettle 1, a mixer 2, and a cooler 8. The mixer 2 is provided with an acidic material feed pipe 6. The alkali dissolving kettle 1 is connected to the alkali circulation pump 5, the alkali circulation pump 5 is connected to the cooler 8, the cooler 8 is connected to the mixer 2, and the mixer 2 is connected to the alkali dissolving kettle 1.
[0020] The alkali dissolving kettle 1 is provided with a feed pipe 3 .
[0021] The pipeline connecting the alkali dissolving kettle 1 and the alkali circulation pump 5 is connected with a discharge pipe 4.
[0022] The cooler 8 is equipped with a refrigerant feed pipe 9 and a refrigerant discharge pipe 10. The cooler 8 utilizes efficient heat exchange technology, combined with the refrigerant feed pipe 9 and the refrigerant discharge pipe 10, to achieve rapid and uniform cooling. A -10°C refrigerant is used to cool the alkali solution.
[0023] The acidic material feed pipe 6 is provided with an acidic material feed valve 7 .
[0024] The alkali washing treatment device for acidic materials described in the present invention is configured to inject alkali solution into the alkali dissolving kettle 1 before starting the device, and at the same time check the refrigerant system of the cooler 8. After starting, the alkali solution circulates under the drive of the alkali circulation pump 5, and is cooled by the cooler 8 to reduce the decomposition of sodium hypochlorite due to high temperature. Subsequently, the acidic material is precisely controlled to be added to the mixer 2 through the acidic material feed valve 7, and mixed with the cooled alkali solution for reaction. The mixer 2 ensures that the materials are evenly mixed, and the generated neutral materials and sodium hypochlorite continue to be cooled as they circulate. After the reaction, the alkali circulation pump 5 is stopped, and the materials in the alkali dissolving kettle 1 are allowed to stand, and the materials and alkali solution are separated into layers. After sufficient standing and separation, the neutral materials at the bottom are discharged into the crude product tank through the discharge pipe 4, and the remaining alkali solution is recycled. After sampling and analysis, the alkali concentration is less than 4%, and the alkali solution is discharged into the sodium hypochlorite storage tank.
[0025] The utility model converts the alkali washing wastewater in the R113a production process into qualified sodium hypochlorite products for sale.
[0026] Of course, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by ordinary technicians in this technical field within the essential scope of the present invention should all fall within the scope of the patent of the present invention.
Claims
1. An alkaline washing treatment device for acidic materials, characterized in that: The invention comprises an alkali dissolving kettle (1), a mixer (2), and a cooler (8); the mixer (2) is provided with an acidic material feed pipe (6); the alkali dissolving kettle (1) is connected to an alkali circulation pump (5); the alkali circulation pump (5) is connected to the cooler (8); the cooler (8) is connected to the mixer (2); and the mixer (2) is connected to the alkali dissolving kettle (1).
2. The alkaline washing treatment device for acidic materials according to claim 1, characterized in that: The alkali dissolving kettle (1) is provided with a feed pipe (3).
3. The alkaline washing treatment device for acidic materials according to claim 1, characterized in that: A discharge pipe (4) is connected to the pipeline connecting the alkali dissolving kettle (1) and the alkali circulation pump (5).
4. The alkaline washing treatment device for acidic materials according to claim 1, characterized in that: The cooler (8) is provided with a refrigerant feed pipe (9) and a refrigerant discharge pipe (10).
5. The alkaline washing treatment device for acidic materials according to claim 1, characterized in that: The acidic material feed pipe (6) is provided with an acidic material feed valve (7).