Potassium hydroxide ionic membrane method production system and method

Abstract

The invention belongs to the technical field of chemical production, and particularly relates to a potassium hydroxide ionic membrane process production system which comprises a processing tank, a heating plate is arranged on the side wall of the processing tank, and a mixing mechanism is arranged in the processing tank; the mixing mechanism comprises a hollow cylinder rotationally mounted in the middle of the processing tank, the hollow cylinder is provided with a rotating assembly, a magnetic block is slidably arranged in the hollow cylinder, the magnetic block is provided with a lifting assembly, a sleeve is slidably arranged on the outer side of the hollow cylinder, a first iron ring matched with the magnetic block is fixed to the upper end of the sleeve, and a first electromagnet is fixed to the lower side of the magnetic block; four groups of uniformly distributed stirring assemblies are arranged on the side wall of the sleeve; after a solution reacts to generate a solid, the circular filter plate at the bottom can be directly lifted upwards, so that the solution is separated from the solid, the solution does not need to be independently transferred, subsequent purification work can be directly carried out, and the device is convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical production, and in particular relates to a potassium hydroxide ion membrane production system and method. Background Art

[0002] Potassium hydroxide (KOH) is an important inorganic chemical raw material, widely used in chemical, pharmaceutical, textile, papermaking, soap and detergent industries. With the continuous development of industrial technology, the requirements for the purity, output and production efficiency of potassium hydroxide are getting higher and higher. The traditional potassium hydroxide production method has many shortcomings, such as low production efficiency, high energy consumption, serious environmental pollution and other problems, which can hardly meet the needs of modern industry. The ion membrane potassium hydroxide production system electrolyzes saturated potassium chloride solution and uses the selective permeability of the ion membrane to separate the hydroxide ions produced at the cathode from the hydrogen ions produced at the anode, thereby obtaining a potassium hydroxide solution with higher purity in the cathode chamber.

[0003] Purification refers to the process of separating impurities from a mixture to improve its purity, that is, removing impurities from a mixture to obtain a pure substance. If the impurities undergo chemical changes during purification, they do not have to be restored to their original substance. Purification, as an important chemical method, not only plays an important role in chemical research, but also plays a very important role in chemical production. Many important chemical research and chemical production are based on purification.

[0004] The existing public technology CN115300953A sets two independent operation spaces, namely a preparation box and a purification box, for purifying potassium hydroxide solution to carry out preparation reaction and purification operation. This method makes the overall volume of the device too large, the production steps are more complicated, and it is inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to provide a potassium hydroxide ion membrane production system and method.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A potassium hydroxide ion membrane production system, comprising a processing tank, a heating plate is arranged on the side wall of the processing tank, and a mixing mechanism is arranged in the processing tank;

[0008] The mixing mechanism comprises a hollow cylinder rotatably mounted in the middle of the processing tank, the hollow cylinder is provided with a rotating assembly, a magnetic block is slidably arranged inside the hollow cylinder, the magnetic block is provided with a lifting assembly, a sleeve is slidably arranged outside the hollow cylinder, a first iron ring matching the magnetic block is fixed to the upper end of the sleeve, a first electromagnet is fixed to the lower side of the magnetic block, and four groups of stirring assemblies evenly distributed are provided on the side wall of the sleeve;

[0009] The stirring assembly includes a fixed rod fixed to the side wall of the sleeve, a circular groove is provided in the middle of the fixed rod, a circular block is slidably provided in the middle of the circular groove, a stirring shaft is rotatably installed on the circular block away from the hollow cylinder, a first spring is provided between the circular block close to the hollow cylinder and the side wall of the circular groove, a sliding groove is provided at the end of the fixed rod, a connecting rod is fixed to the circular block, the connecting rod extends into the sliding groove and is connected to a first iron block, a first spiral groove is provided on the side wall of the circular groove, and a first guide block matching the first spiral groove is fixed to the side wall of the stirring shaft.

[0010] An arc-shaped stirring blade is fixed on the end of the stirring shaft.

[0011] The rotating assembly includes a first gear that passes through the upper end of the hollow cylinder and is connected to the processing tank. The upper end of the processing tank is rotatably equipped with a second gear that meshes with the first gear. A bracket is fixed to the upper end of the processing tank, and the bracket is equipped with a first motor. The output shaft of the first motor is transmission-connected to the second gear.

[0012] The lifting assembly includes two vertical plates fixed on the bracket, a winding roller is rotatably installed between the two vertical plates, a pull wire is wound around the winding roller, the pull wire extends into the hollow cylinder and is connected to the magnetic block, a second motor is installed on the vertical plates, and an output shaft of the second motor is connected to the winding roller.

[0013] An annular groove is provided on the upper side of the processing tank, an annular nozzle is installed in the annular groove, a liquid storage tank is installed on the side wall of the processing tank, a water pump is installed in the liquid storage tank, and the water outlet of the water pump is connected to the annular nozzle through a pipeline.

[0014] A circular seat is sleeved on the outer side of the hollow cylinder, and the circular seat is located at the bottom of the processing tank. A plurality of rotating shafts are rotatably installed on the side wall of the circular seat, and the rotating shafts are provided with a flip assembly. A plurality of fan-shaped filter plates are fixed on the side walls of the rotating shafts, and the plurality of fan-shaped filter plates together constitute a circular filter plate. A second iron ring matching the first electromagnet is fixed on the upper end of the circular seat.

[0015] The flip assembly includes a circular seat with a sliding groove, a sliding rod sliding in the sliding groove, a slot on the rotating shaft, a second spiral groove on the inner wall of the slot, the sliding rod extending into the slot and fixed with a second guide block matching the second spiral groove, a movable plate fixed to the middle of the sliding rod, a baffle fixed to the sliding groove, a second spring between the movable plate and the baffle, a second iron block fixed to one end of the sliding rod close to the hollow cylinder, and a second electromagnet matching the second iron block also fixed to the lower end of the first electromagnet.

[0016] A method for producing potassium hydroxide by ion membrane method, using the above production system for production, comprises the following steps:

[0017] Step 1: Add a saturated solution of potassium chloride into a processing tank, then heat it with a heating plate to a temperature of 90°C, then add potassium carbonate, potassium hydroxide and barium chloride solution into the processing tank respectively, and mix and stir them with a mixing mechanism. After the mixing is completed, the mixing mechanism stops working, and the liquid will generate a solid after standing;

[0018] Step 2: After the precipitation is completed, the circular filter plate is driven upward by the lifting assembly to lift the solid to the upper side of the processing tank, above the solution;

[0019] Step 3: By starting the water pump inside the liquid storage tank, the hydrochloric acid solution is sprayed from the annular nozzle into the solution inside the processing tank, and the hydrochloric acid solution is passed into the solution for neutralization. After the neutralization is completed, the heating plate heats up the solution in the processing tank and maintains it at 70-75°C. The electrolytic rod is connected through a wiring harness and drawn into the processing tank through the slot opened on the upper side of the processing tank, and vertically extends into the solution. The electrolytic rod then electrolyzes the solution to obtain a potassium hydroxide solution with a higher purity.

[0020] After the solution of the present invention reacts to produce solids, the circular filter plate at the bottom can be directly lifted upward to separate the solution from the solids. The solution does not need to be transported separately, and subsequent purification work can be directly carried out, which is convenient to use.

[0021] The present invention realizes efficient mixing of solutions through the design of the mixing mechanism, and forms a multi-dimensional stirring effect by utilizing the rotation of the hollow cylinder, the lifting and lowering of the magnetic block and the sleeve, and the rotation of the stirring shaft, thereby greatly improving the mixing uniformity and reaction efficiency of the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further illustrated by means of the non-limiting examples given in the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the processing tank of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the processing tank of the present invention;

[0025] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0026] Figure 4 for Figure 2 A schematic diagram of the structure enlarged at B in the middle;

[0027] Figure 5 It is a structural schematic diagram of the stirring assembly of the present invention;

[0028] Figure 6 It is a schematic diagram of the overall structure of the circular seat and a plurality of fan-shaped filter plates of the present invention.

[0029] The main component symbols are described as follows:

[0030] Processing tank 1, hollow cylinder 11, magnetic block 12, sleeve 13, first iron ring 14, first electromagnet 15, fixed rod 2, circular groove 21, first spiral groove 211, first guide block 212, circular block 22, stirring shaft 23, arc stirring blade 231, first spring 24, slide groove 25, connecting rod 26, first iron block 27, first gear 3, second gear 31, bracket 32, first motor 33, vertical plate 34, winding roller 35, pulling wire 36, second motor 37, annular nozzle 4, liquid storage tank 41, circular seat 5, rotating shaft 51, fan-shaped filter plate 52, second iron ring 53, sliding groove 6, sliding rod 61, slot 62, second spiral groove 63, second guide block 64, movable plate 65, baffle 66, second spring 67, second iron block 68, second electromagnet 69. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 1-6 As shown, a potassium hydroxide ion membrane production system of the present invention includes a processing tank 1, characterized in that: a heating plate is provided on the side wall of the processing tank 1, and a mixing mechanism is provided in the processing tank 1;

[0033] The mixing mechanism includes a hollow cylinder 11 rotatably mounted in the middle of the processing tank 1, the hollow cylinder 11 is provided with a rotating assembly, a magnetic block 12 is slidably arranged in the hollow cylinder 11, the magnetic block 12 is provided with a lifting assembly, a sleeve 13 is slidably arranged outside the hollow cylinder 11, a first iron ring 14 matching the magnetic block 12 is fixed to the upper end of the sleeve 13, a first electromagnet 15 is fixed to the lower side of the magnetic block 12, and four groups of evenly distributed stirring assemblies are arranged on the side wall of the sleeve 13;

[0034] The stirring assembly includes a fixed rod 2 fixed to the side wall of the sleeve 13, a circular groove 21 is opened in the middle of the fixed rod 2, a circular block 22 is slidably provided in the middle of the circular groove 21, a stirring shaft 23 is rotatably installed on the side of the circular block 22 away from the hollow cylinder 11, a first spring 24 is provided between the side of the circular block 22 close to the hollow cylinder 11 and the side wall of the circular groove 21, a sliding groove 25 is opened at the end of the fixed rod 2, a connecting rod 26 is fixed to the circular block 22, the connecting rod 26 extends into the sliding groove 25 and is connected to a first iron block 27, a first spiral groove 211 is opened on the side wall of the circular groove 21, and a first guide block 212 matching the first spiral groove 211 is fixed to the side wall of the stirring shaft 23.

[0035] An arc-shaped stirring blade 231 is fixed to the end of the stirring shaft 23 .

[0036] The rotating assembly includes a first gear 3 connected to the processing tank 1 and passing through the upper end of the hollow cylinder 11. The upper end of the processing tank 1 is rotatably equipped with a second gear 31 that meshes with the first gear 3. A bracket 32 ​​is fixed to the upper end of the processing tank 1. The bracket 32 ​​is equipped with a first motor 33. The output shaft of the first motor 33 is transmission-connected to the second gear 31.

[0037] The lifting assembly includes two vertical plates 34 fixed on the bracket 32, and a winding roller 35 is rotatably installed between the two vertical plates 34. The winding roller 35 is wrapped with a pull wire 36, which extends into the hollow cylinder 11 and is connected to the magnetic block 12. The vertical plates 34 are installed with a second motor 37, and the output shaft of the second motor 37 is connected to the winding roller 35.

[0038] An annular groove is provided on the upper side of the processing tank 1, an annular nozzle 4 is installed in the annular groove, a liquid storage tank 41 is installed on the side wall of the processing tank 1, a water pump is installed in the liquid storage tank 41, and the water outlet of the water pump is connected to the annular nozzle 4 through a pipeline.

[0039] A circular seat 5 is sleeved on the outside of the hollow cylinder 11, and the circular seat 5 is located at the bottom of the processing tank 1. A plurality of rotating shafts 51 are rotatably installed on the side wall of the circular seat 5. The rotating shafts 51 are provided with a flip assembly. Fan-shaped filter plates 52 are fixed to the side walls of the plurality of rotating shafts 51. The plurality of fan-shaped filter plates 52 together constitute a circular filter plate. A second iron ring 53 matching the first electromagnet 15 is fixed to the upper end of the circular seat 5.

[0040] The flip assembly includes a circular seat 5 with a sliding groove 6, a sliding rod 61 slidingly arranged in the sliding groove 6, a rotating shaft 51 with a slot 62, an inner wall of the slot 62 with a second spiral groove 63, the sliding rod 61 extending into the slot 62 and fixed with a second guide block 64 matching the second spiral groove 63, a movable plate 65 fixed to the middle of the sliding rod 61, a baffle 66 fixed to the sliding groove 6, a second spring 67 provided between the movable plate 65 and the baffle 66, a second iron block 68 fixed to one end of the sliding rod 61 close to the hollow cylinder 11, and a second electromagnet 69 matching the second iron block 68 fixed to the lower end of the first electromagnet 15.

[0041] When in use, a saturated solution of potassium chloride is added to the processing tank 1, which is then heated by a heating plate to a temperature of 90°C, and potassium carbonate, potassium hydroxide and barium chloride solutions are added to the processing tank 1 respectively, and the mixing mechanism is used to mix and stir them (the first motor 33 is started to drive the second gear 31 to rotate, and the hollow cylinder 11 is driven to rotate through the first gear 3, and the four stirring components of the hollow cylinder 11 stir and mix the solution, that is, the arc-shaped stirring blade 231 is driven to revolve for stirring. During the stirring process, the winding roller 35 can be driven to rotate by starting the second motor 37 to reel in or unwind the pull wire 36, thereby pulling the magnetic block 12 to move up and down inside the hollow cylinder 11. The sleeve 13 is adsorbed on the magnetic block 12 by the first iron ring 14, and can drive the sleeve 13 to move up and down, so that the arc-shaped stirring blade 231 moves up and down while revolving. At the same time, the first electromagnet 15 can be started to generate magnetic force by energizing, and the first iron block 27 is adsorbed. Then, the circular block 22 is driven to slide toward one side of the hollow cylinder 11 through the connecting rod 26, and the first guide block 212 fixed to the stirring shaft 23 slides in the first spiral groove 211 on the side wall of the circular groove 21, so that the stirring shaft 23 can be rotated to a horizontal state. When the first electromagnet 15 is powered off, the circular block 22 is pushed to reset by the first spring 24, so that the arc stirring blade 231 is restored to a vertical state. Therefore, during the stirring process, the power on and off of the first electromagnet 15 can be controlled, and the arc stirring blade 231 can reciprocate and rotate, thereby improving the mixing effect of the solution and improving the processing efficiency). After the mixing is completed, the mixing mechanism stops working, and the liquid will generate solids after standing, and the solids will precipitate downward and fall onto the circular filter plate composed of a plurality of fan-shaped filter plates 52;

[0042] After the precipitation is completed, the first electromagnet 15 is in a powered state, that is, the arc-shaped stirring blade 231 is in a horizontal state, and the magnetic block 12 is driven by the lifting assembly to move downward to the bottom of the hollow cylinder 11, and the lower side of the first electromagnet 15 will be adsorbed by the second iron ring 53 above the circular seat 5, so as to realize the connection between the circular seat 5 and the first electromagnet 15. At this time, the second electromagnet 69 is powered on to generate magnetic force to adsorb a plurality of second iron blocks 6, and then the magnetic block 12 is driven up and down by the lifting assembly, so that the circular seat 5 can be driven to move upward synchronously, and the circular filter plate composed of a plurality of fan-shaped filter plates 52 moves upward to lift the generated solid upward, and moves upward to the top of the annular nozzle 4 for draining treatment;

[0043] By starting the water pump inside the liquid storage tank, the hydrochloric acid solution inside the liquid storage tank is transported to the annular nozzle 4, and finally sprayed from the annular nozzle 4 to the solution inside the processing tank 1, and the hydrochloric acid solution is passed into the solution for neutralization. After the neutralization is completed, the heating plate heats the solution in the processing tank and maintains it at 70-75°C. The electrolytic rod is connected through a wire harness and drawn into the processing tank 1 through the slot opened on the upper side of the processing tank 1, and vertically extends into the solution. Then the electrolytic rod electrolyzes the solution to obtain a potassium hydroxide solution with a higher purity.

[0044] The potassium hydroxide solution is finally discharged from the discharge pipe at the bottom of the processing tank 1. The second electromagnet 69 can be controlled to be powered off, and the elastic force of the second spring 67 will push the movable plate 65 to drive the slide bar 61 to slide, that is, the second guide block 64 moves in the second spiral groove 63, which will push the rotating shaft 51 to rotate, so that the fan-shaped filter plate 52 flips downward by a certain angle, so that the solid on the surface of the fan-shaped filter plate 52 will fall downward to the bottom of the processing tank 1, which is convenient for cleaning the solid;

[0045] Finally, the first electromagnet 15 is powered off, the second iron ring 53 is not adsorbed thereon, and the circular seat 5 slides downward to the bottom of the processing tank 1 by its own weight. When the inclined sector-shaped filter plate 52 contacts the bottom of the processing tank 1, the inclined sector-shaped filter plate 52 can be pushed to flip to a horizontal state;

[0046] The pull wire 36 is connected to the magnetic block 12 through a rotating block. When the magnetic block 12 rotates, the pull wire 36 will not be driven to rotate, thereby preventing the pull wire 36 from being entangled and knotted.

[0047] The fan-shaped filter plate 52 is turned over to an inclined state, which can be easily flushed, and the sewage after flushing can flow downward.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A potassium hydroxide ion membrane production system, comprising a processing tank, characterized in that: The side wall of the processing tank is provided with a heating plate, and a mixing mechanism is provided in the processing tank; The mixing mechanism comprises a hollow cylinder rotatably mounted in the middle of the processing tank, the hollow cylinder is provided with a rotating assembly, a magnetic block is slidably arranged inside the hollow cylinder, the magnetic block is provided with a lifting assembly, a sleeve is slidably arranged outside the hollow cylinder, a first iron ring matching the magnetic block is fixed to the upper end of the sleeve, a first electromagnet is fixed to the lower side of the magnetic block, and four groups of stirring assemblies evenly distributed are provided on the side wall of the sleeve; The stirring assembly includes a fixed rod fixed to the side wall of the sleeve, a circular groove is provided in the middle of the fixed rod, a circular block is slidably provided in the middle of the circular groove, a stirring shaft is rotatably installed on the circular block away from the hollow cylinder, a first spring is provided between the circular block close to the hollow cylinder and the side wall of the circular groove, a sliding groove is provided at the end of the fixed rod, a connecting rod is fixed to the circular block, the connecting rod extends into the sliding groove and is connected to a first iron block, a first spiral groove is provided on the side wall of the circular groove, and a first guide block matching the first spiral groove is fixed to the side wall of the stirring shaft.

2. A potassium hydroxide ion membrane production system according to claim 1, characterized in that: An arc-shaped stirring blade is fixed at the end of the stirring shaft.

3. A potassium hydroxide ion membrane production system according to claim 2, characterized in that: The rotating assembly includes a first gear that passes through the upper end of the hollow cylinder and is connected to the processing tank. The upper end of the processing tank is rotatably equipped with a second gear that meshes with the first gear. A bracket is fixed to the upper end of the processing tank, and the bracket is equipped with a first motor. The output shaft of the first motor is transmission-connected to the second gear.

4. A potassium hydroxide ion membrane production system according to claim 3, characterized in that: The lifting assembly includes two vertical plates fixed on the bracket, a winding roller is rotatably installed between the two vertical plates, a pull wire is wound around the winding roller, the pull wire extends into the hollow cylinder and is connected to the magnetic block, a second motor is installed on the vertical plates, and an output shaft of the second motor is connected to the winding roller.

5. A potassium hydroxide ion membrane production system according to claim 4, characterized in that: An annular groove is provided on the upper side of the processing tank, an annular nozzle is installed in the annular groove, a liquid storage tank is installed on the side wall of the processing tank, a water pump is installed in the liquid storage tank, and the water outlet of the water pump is connected to the annular nozzle through a pipeline.

6. A potassium hydroxide ion membrane production system according to claim 5, characterized in that: A circular seat is sleeved on the outer side of the hollow cylinder, and the circular seat is located at the bottom of the processing tank. A plurality of rotating shafts are rotatably installed on the side wall of the circular seat, and the rotating shafts are provided with a flip assembly. A plurality of fan-shaped filter plates are fixed on the side walls of the rotating shafts, and the plurality of fan-shaped filter plates together constitute a circular filter plate. A second iron ring matching the first electromagnet is fixed on the upper end of the circular seat.

7. A potassium hydroxide ion membrane production system according to claim 5, characterized in that: The flip assembly includes a circular seat with a sliding groove, a sliding rod sliding in the sliding groove, a slot on the rotating shaft, a second spiral groove on the inner wall of the slot, the sliding rod extending into the slot and fixed with a second guide block matching the second spiral groove, a movable plate fixed to the middle of the sliding rod, a baffle fixed to the sliding groove, a second spring between the movable plate and the baffle, a second iron block fixed to one end of the sliding rod close to the hollow cylinder, and a second electromagnet matching the second iron block also fixed to the lower end of the first electromagnet.

8. A method for producing potassium hydroxide by ion membrane method, using the production system according to claims 1-7 for production, characterized in that: The following steps are involved: Step 1: Add a saturated solution of potassium chloride into a processing tank, then heat it with a heating plate to a temperature of 90°C, then add potassium carbonate, potassium hydroxide and barium chloride solution into the processing tank respectively, and mix and stir them with a mixing mechanism. After the mixing is completed, the mixing mechanism stops working, and the liquid will generate a solid after standing; Step 2: After the precipitation is completed, the circular filter plate is driven upward by the lifting assembly to lift the solid to the upper side of the processing tank, above the solution; Step 3: By starting the water pump inside the liquid storage tank, the hydrochloric acid solution is sprayed from the annular nozzle into the solution inside the processing tank, and the hydrochloric acid solution is passed into the solution for neutralization. After the neutralization is completed, the heating plate heats up the solution in the processing tank and maintains it at 70-75°C. The electrolytic rod is connected through a wiring harness and drawn into the processing tank through the slot opened on the upper side of the processing tank, and vertically extends into the solution. The electrolytic rod then electrolyzes the solution to obtain a potassium hydroxide solution with a higher purity.

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