High-efficiency hydrochloric acid extraction and purification device

Abstract

The utility model relates to the technical field of hydrochloric acid recovery, in particular to an efficient hydrochloric acid extraction and purification device. Comprising an extraction tank, the extraction tank internally comprises a lower extraction cavity and an upper precipitation cavity which are separated by a porous partition plate, a washing chamber communicated through an overflow pipe is arranged on one side of the upper precipitation cavity, an overflow plate is arranged on the side, away from the overflow pipe, in the washing chamber, and the upper end face of the overflow plate is located below the overflow pipe; a distributor located between the overflow pipe and the overflow plate is arranged in the washing chamber, a cooling pipe communicated with the distributor and used for cooling washing liquid is arranged above the washing chamber, and a drainage opening communicated with the interior of the washing chamber is formed in the lower portion of the side, away from the overflow pipe, of the overflow plate. And a discharge pipe orifice positioned between the overflow pipe and the overflow plate is also arranged below the washing chamber in a communicating manner. According to the utility model, through effective extraction and washing, the product purity and the recovery rate are improved, and meanwhile, the environmental influence and the production cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrochloric acid recovery technology, specifically to a high-efficiency hydrochloric acid extraction and purification device. Background Technology

[0002] Hydrochloric acid, as an important chemical raw material, is widely used in steel cleaning, electroplating, pharmaceuticals, fertilizers, and many other fields during industrial production. However, used hydrochloric acid often contains a large number of impurities, such as metal ions and solid particles, which seriously affect its reuse value and industrial application effectiveness. Therefore, effective purification of industrial waste hydrochloric acid can not only reduce environmental pollution but also achieve resource recycling. Extraction purification is one method for recovering hydrochloric acid. Currently used extraction devices have a relatively simple structure. After mixing and reacting in a simple extraction tank, the upper light phase is transported to a back-extraction tank for back-extraction separation. This operation is simple and straightforward, but the extraction and separation efficiency is low, and the subsequent purification effect is poor, increasing the complexity of subsequent processes. Utility Model Content

[0003] This invention provides a high-efficiency hydrochloric acid extraction and purification device to solve the technical problems of low extraction and separation efficiency, poor subsequent purification effect, and increased complexity of subsequent processes.

[0004] To solve the above problems, the present invention provides a high-efficiency hydrochloric acid extraction and purification device, which adopts the following technical solution:

[0005] The device includes an extraction tank containing a lower extraction chamber and an upper sedimentation chamber separated by a porous partition. A washing chamber, connected to the upper sedimentation chamber via an overflow pipe, is located on one side of the washing chamber away from the overflow pipe. An overflow plate is located on the side of the washing chamber away from the overflow pipe, with its upper surface below the overflow pipe. A distributor is located between the overflow pipe and the overflow plate within the washing chamber. A cooling pipe, connected to the distributor and used for cooling the washing liquid, is located above the washing chamber. A drain port, connected to the interior of the washing chamber, is located below the side of the overflow plate away from the overflow pipe. A discharge port, located between the overflow pipe and the overflow plate, is also connected below the washing chamber.

[0006] One side of the lower extraction chamber is connected to a liquid inlet pipe.

[0007] Furthermore, the cooling pipe includes a central flow channel communicating with the distributor, a sleeve is provided outside the central flow channel with a gap, a liquid cooling cavity is formed between the inner wall of the sleeve and the outer wall of the central flow channel, and a branch pipe is on the side wall of the sleeve.

[0008] The top of the central flow channel extends outward from the sleeve, and a connecting flange is provided on the extended end.

[0009] Furthermore, the distributor includes a collection pipe that runs vertically through the top wall of the washing chamber. The top end of the collection pipe is connected to the central flow channel, and the bottom end of the collection pipe is provided with a diversion pipe with a diversion hole on the bottom surface.

[0010] Furthermore, the diameter of the diversion orifice gradually decreases from one end near the overflow pipe to the other end.

[0011] Furthermore, the discharge port and the inlet pipe are connected by a recovery pipe, and the recovery pipe is equipped with a solenoid valve.

[0012] Furthermore, the free end of the inlet pipe is connected to a jet pump for premixing.

[0013] Furthermore, the distance between the overflow pipe and the porous baffle is L1, and the distance between the porous baffle and the inlet pipe is L2, and L1 < L2.

[0014] The beneficial effects of the utility model are:

[0015] 1. In this utility model, the premixing of industrial hydrochloric acid waste liquid and extractant is achieved by using a jet pump. The high-speed flow of liquid momentum is used to eject the extractant, which enhances the mixing effect and improves the extraction efficiency. In addition, the lower extraction chamber and the upper precipitation chamber are separated by a porous partition, which is conducive to achieving stratification and the continuity of the extraction process, while maintaining the simplicity of operation.

[0016] 2. In this invention, the design of the washing chamber allows the washing liquid to fully contact the light phase substance. The liquid is then distributed through a distributor, enhancing the washing effect, aiding in the removal of impurities, and contributing to improved product purity. Furthermore, appropriately lowering the temperature of the washing liquid can reduce molecular motion, thereby reducing back-extraction that occurs when the washing liquid contacts the light phase.

[0017] 3. In this utility model, the design of the recovery pipeline and solenoid valve realizes the reflux from the washing chamber to the lower extraction chamber, thereby improving the utilization rate of raw materials and the extraction efficiency. Attached Figure Description

[0018] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the high-efficiency hydrochloric acid extraction and purification device of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the high-efficiency hydrochloric acid extraction and purification device of this utility model;

[0021] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0022] Figure 4 This is a schematic diagram of the bottom surface of the diversion tube in this utility model;

[0023] Figure 5 This is a cross-sectional front view of the high-efficiency hydrochloric acid extraction and purification device of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Extraction tank; 11. Porous baffle; 12. Lower extraction chamber; 121. Inlet pipe; 13. Upper sedimentation chamber; 14. Overflow pipe; 2. Washing chamber; 21. Overflow plate; 22. Distributor; 221. Manifold; 222. Diverter; 223. Diverter orifice; 23. Cooling pipe; 231. Central pipe; 232. Sleeve; 233. Cooling chamber; 24. Drain port; 25. Discharge port; 26. Recovery pipe; 261. Solenoid valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0028] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0029] An embodiment of the high-efficiency hydrochloric acid extraction and purification device provided by this utility model:

[0030] like Figures 1 to 5 As shown,

[0031] The system includes an extraction tank 1, which comprises a lower extraction chamber 12 and an upper sedimentation chamber 13 separated by a porous partition 11. An inlet pipe 121 is connected to one side of the lower extraction chamber 12. The free end of the inlet pipe 121 is connected to a jet pump for premixing. Industrial hydrochloric acid waste liquid undergoing extraction flows in through the jet pump, while the extractant enters through the side port of the jet pump. The high-speed hydrochloric acid waste liquid has an entraining effect on the extractant. After passing through the jet pump, the two are premixed and then enter the lower extraction chamber 12 for extraction. A light phase is generated in the lower extraction chamber 12, above the aqueous phase, and gradually permeates through the porous partition 11 into the upper sedimentation chamber 13.

[0032] The distance between the overflow pipe 14 and the porous partition 11 is L1, and the distance between the porous partition 11 and the liquid inlet pipe 121 is L2, and L1 < L2.

[0033] The relatively small spacing of L1 reduces the residence time of the light phase in the upper sedimentation chamber 13, reduces the possibility of back-mixing between the light phase and the newly entered heavy phase during the rising process, helps to maintain the continuity and efficiency of the extraction process, and provides more extraction time for the heavy phase, which helps to maintain the separation of the two phases and improves the extraction efficiency.

[0034] A washing chamber 2 is provided on one side of the upper sedimentation chamber 13, which is connected to the overflow pipe 14. An overflow plate 21 is provided on the side of the washing chamber 2 away from the overflow pipe 14, and the upper end face of the overflow plate 21 is below the overflow pipe 14. A distributor 22 is provided in the washing chamber 2 between the overflow pipe 14 and the overflow plate 21.

[0035] The overflow plate 21 is provided with a drain port 24 connected to the interior of the washing chamber 2 on the side away from the overflow pipe 14. The bottom of the washing chamber 2 is also connected with a discharge pipe port 25 located between the overflow pipe 14 and the overflow plate 21.

[0036] When the upper layer of the light phase exceeds the overflow pipe 14, it gradually enters the washing chamber 2. The washing liquid is sprayed down through the distributor 22, ensuring full contact between the washing liquid and the light phase. The heavy phase then naturally settles. Once the upper layer of the light phase in the washing chamber 2 exceeds the overflow plate 21, it flows through the overflow plate 21 to the other side, and finally exits through the drain port 24 to the next process. The heavy phase in the washing chamber 2 is gradually discharged from the discharge pipe 25.

[0037] The discharge port 25 is connected to the inlet pipe 121 via a recovery pipe 26, and the recovery pipe 26 is equipped with a solenoid valve 261.

[0038] The liquid phase discharged from the discharge port 25 will enter the lower extraction chamber 12 through the liquid inlet pipe 121 for further extraction and recovery.

[0039] In this embodiment, the distributor 22 includes a collection pipe 221 that runs vertically through the top wall of the washing chamber 2. The top end of the collection pipe 221 is connected to the central flow channel 231. The bottom end of the collection pipe 221 is provided with a diversion pipe 222, and the bottom surface of the diversion pipe 222 is provided with a diversion hole 223.

[0040] The diameter of the diversion hole 223 gradually decreases from one end near the overflow pipe 14 to the other end.

[0041] The design of the collector pipe 221 and the distributor pipe 222 of the distributor 22 enables the washing liquid to be evenly distributed on the cross-section of the washing chamber 2, avoiding the situation of too much or too little washing liquid in local areas and improving washing efficiency.

[0042] In addition, the diameter of the diversion hole 223 gradually decreases from one end near the overflow pipe 14 to the other end. This design helps to create a gradient flow and improves the washing effect.

[0043] In this embodiment, a cooling pipe 23 is provided above the washing chamber 2, which is connected to the distributor 22 and is used to cool the washing liquid.

[0044] The cooling pipe 23 includes a central flow channel 231 connected to the distributor 22. A sleeve 232 is fitted over the central flow channel 231 with a gap. A liquid cooling cavity 233 is formed between the inner wall of the sleeve 232 and the outer wall of the central flow channel 231. There are branch pipes on the side wall of the sleeve 232. There are two branch pipes on the side wall of the sleeve 232, one at the upper end and the other at the lower end, one for the inflow of coolant and the other for the outflow of coolant.

[0045] The top end of the central flow channel 231 extends outward beyond the sleeve 232, and a connecting flange is provided on the extended end.

[0046] The coolant in the liquid-cooled chamber 233 provides a cooling effect on the washing liquid passing through the central flow channel 231. By lowering the temperature, appropriately reducing the temperature of the washing liquid can reduce molecular motion, thereby reducing the back-extraction phenomenon that occurs when the washing liquid comes into contact with the light phase.

[0047] In this embodiment, the high-efficiency hydrochloric acid extraction and purification device is used to deliver the extractant and extractant to the extraction tank 1 via a jet pump. After the extraction reaction, the upper light phase gradually enters the washing chamber 2 through the overflow pipe 14 for preliminary washing and impurity removal. The upper light phase in the washing chamber 2 flows out through the drain port 24 after passing through the overflow plate 21 for the subsequent back-extraction process. The heavy phase in the washing chamber 2 is intermittently discharged through the discharge pipe 25.

[0048] To reduce back-extraction that occurs when the washing solution comes into contact with the light phase, the pH of the washing solution is selected to be 3.4-4.5. This pH range helps to reduce back-extraction while effectively removing impurities from the organic phase.

[0049] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0050] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A high-efficiency hydrochloric acid extraction and purification device, comprising an extraction tank (1), characterized in that, The extraction tank (1) includes a lower extraction chamber (12) and an upper sedimentation chamber (13) separated by a porous partition (11). A washing chamber (2) connected to the upper sedimentation chamber (13) via an overflow pipe (14) is provided on one side of the upper sedimentation chamber (13). An overflow plate (21) is provided on the side of the washing chamber (2) away from the overflow pipe (14), with its upper end face positioned below the overflow pipe (14). The washing chamber (2) contains a material positioned below the overflow pipe (14). A distributor (22) is provided between the overflow pipe (14) and the overflow plate (21). A cooling pipe (23) is provided above the washing chamber (2) and is connected to the distributor (22) for cooling the washing liquid. A drain port (24) is provided below the side of the overflow plate (21) away from the overflow pipe (14) and is connected to the interior of the washing chamber (2). A discharge pipe port (25) is also provided below the washing chamber (2) between the overflow pipe (14) and the overflow plate (21). One side of the lower extraction chamber (12) is connected to an inlet pipe (121).

2. The high-efficiency hydrochloric acid extraction and purification apparatus according to claim 1, characterized in that, The cooling pipe (23) includes a central flow channel (231) communicating with the distributor (22), and a sleeve (232) is provided outside the central flow channel (231) with a gap. A liquid cooling cavity (233) is formed between the inner wall of the sleeve (232) and the outer wall of the central flow channel (231), and a branch pipe is provided on the side wall of the sleeve (232). The top end of the central flow channel (231) extends outward beyond the sleeve (232) and a connecting flange is provided on the extended end.

3. The high-efficiency hydrochloric acid extraction and purification apparatus according to claim 2, characterized in that, The distributor (22) includes a collection pipe (221) that runs vertically through the top wall of the washing chamber (2). The top end of the collection pipe (221) is connected to the central flow channel (231). The bottom end of the collection pipe (221) is provided with a diversion pipe (222), and the bottom surface of the diversion pipe (222) is provided with a diversion hole (223).

4. The high-efficiency hydrochloric acid extraction and purification apparatus according to claim 3, characterized in that, The diameter of the diversion orifice (223) gradually decreases from one end near the overflow pipe (14) to the other end.

5. The high-efficiency hydrochloric acid extraction and purification apparatus according to claim 1, characterized in that, The discharge port (25) and the inlet pipe (121) are connected by a recovery pipe (26), and a solenoid valve (261) is provided on the recovery pipe (26).

6. The high-efficiency hydrochloric acid extraction and purification apparatus according to claim 1, characterized in that, The free end of the inlet pipe (121) is connected to a jet pump for premixing.

7. The high-efficiency hydrochloric acid extraction and purification apparatus according to claim 1, characterized in that, The distance between the overflow pipe (14) and the porous partition (11) is L1, and the distance between the porous partition (11) and the inlet pipe (121) is L2, and L1 < L2.

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