A continuous purification device for crude taurine

Abstract

The utility model discloses a crude taurine continuous purification treatment device, including hot dissolving kettle, the discharge gate of hot dissolving kettle bottom end is connected with mother liquor filter device through first pipe line, and mother liquor filter device is connected with the top of hot dissolving kettle through second pipe line, second pipe line is connected with the top of crystallization kettle through third pipe line, and the discharge gate of crystallization kettle bottom end is connected with first solid -liquid separation device liquid inlet, and first solid -liquid separation device liquid outlet is connected with concentration crystallization kettle, and the liquid outlet of concentration crystallization kettle bottom is connected with the liquid inlet of second solid -liquid separation device, and the liquid outlet of second solid -liquid separation device is connected with electric heating device and electric dialysis device, and the concentrated water outlet of electric dialysis device is connected with concentration crystallization kettle, and the fresh water outlet of electric dialysis device is connected with hot dissolving kettle, and concentration crystallization kettle is connected with tail gas treatment device. The utility model discloses device has the advantage that impurity treatment is complete, and can continuous operation.

Description

Technical Field

[0001] This utility model relates to the field of taurine preparation, and in particular to a continuous purification treatment device for crude taurine. Background Technology

[0002] Taurine, also known as taurine or 2-aminoethanesulfonic acid, is one of the essential amino acids required by the human body under certain conditions. As a non-protein amino acid, taurine has significant physiological effects on physical performance and a series of unique functions in the cardiovascular system, enhancing physical fitness and relieving fatigue. Taurine also possesses anti-inflammatory, antipyretic, analgesic, anticonvulsant, and blood pressure-lowering effects. Furthermore, it plays a beneficial role in infant brain development, nerve conduction, visual function, and calcium absorption. Therefore, taurine is increasingly gaining broad commercial and social value in food, health products, medicine, and organic synthesis, with rapid market demand growth and promising application prospects.

[0003] Currently, in the synthesis and production of taurine, crude taurine requires decolorization with activated carbon followed by solid-liquid separation. In existing technologies, the impurities generated during activated carbon decolorization and thermal dissolution cannot be processed continuously, resulting in low taurine production efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a continuous purification device for crude taurine, which has the advantages of thorough impurity removal and continuous operation.

[0005] The technical solution adopted in this utility model is as follows.

[0006] A continuous purification treatment device for crude taurine, characterized in that: it includes a hot melting kettle, the top of which is provided with inlets for activated carbon and crude taurine, and the top of the hot melting kettle is connected to a water tank; the outlet at the bottom of the hot melting kettle is connected to a mother liquor filtration device through a first pipeline, and the mother liquor filtration device is connected to the top of the hot melting kettle through a second pipeline; the second pipeline is connected to the top of a crystallization kettle through a third pipeline, and the third pipeline is provided with a first shut-off valve; a second shut-off valve is provided between the third pipeline and the top of the hot melting kettle; and a first vacuum pump is provided on the second pipeline.

[0007] The discharge port at the bottom of the crystallization kettle is connected to the inlet of the first solid-liquid separation device; the outlet of the first solid-liquid separation device is connected to the concentration crystallization kettle; the outlet at the bottom of the concentration crystallization kettle is connected to the inlet of the second solid-liquid separation device; the concentration crystallization kettle is equipped with several pH measuring devices, and the top of the concentration crystallization kettle is connected to the sulfuric acid tank; the outlet of the second solid-liquid separation device is connected to the electrodialysis device through an electric heating device; the concentrated water outlet of the electrodialysis device is connected to the concentration crystallization kettle; the fresh water outlet of the electrodialysis device is connected to the hot melt kettle; and the concentration crystallization kettle is connected to an external tail gas treatment device.

[0008] Its beneficial effects are as follows: activated carbon and crude taurine are added through the inlet, water is added to the water tank, and the mixture is heated in the hot dissolving kettle to form a mother liquor. The mother liquor is then repeatedly filtered through a mother liquor filtration device to remove impurities such as activated carbon. The clean mother liquor is then cooled and crystallized in a crystallization kettle. The cooled and crystallized liquid is then separated into solid and liquid in the first solid-liquid separation device. The separated solid is clean taurine, and the separated liquid is taurine wastewater, the main component of which is ammonium salt.

[0009] Taurine wastewater enters a concentration and crystallization kettle, where it is heated and concentrated. Then, it is cooled and crystallized. Finally, the crystallized material is fed into a second solid-liquid separation unit for solid-liquid separation. The resulting solid is ammonium salt, primarily ammonium sulfate, obtained through cooling crystallization. The separated liquid is first heated to 40 degrees Celsius by an electric heater and then sent to an electrodialysis unit. The concentrated liquid outlet of the electrodialysis unit is further concentrated at the material inlet at the top of the concentration and crystallization kettle. The freshwater outlet of the electrodialysis unit is connected to a hot-melt kettle, allowing the freshwater to be utilized. Because the liquid entering the electrodialysis unit has a relatively high temperature, the increased ion transport rate and reduced membrane and solution resistance will increase the desalination capacity and rate, improving the quality of the freshwater. Heating the separated liquid first by an electric heater ensures that no heat is wasted, whether it enters the hot-melt kettle or the concentration and crystallization kettle, resulting in energy savings. The concentration crystallization kettle is equipped with several pH measuring devices. The top of the kettle is connected to a sulfuric acid tank, allowing precise control of sulfuric acid flow. This ensures all ammonia ions react to form ammonium sulfate, which then crystallizes and precipitates out, resulting in thorough wastewater treatment. This invention continuously crystallizes salts from wastewater. The entire treatment process is primarily physical, preventing the introduction of new impurities into the system. The process is continuous, fast, and relatively low-cost.

[0010] As a preferred technical solution, the discharge port at the bottom of the crystallization kettle is connected to the inlet of the first solid-liquid separation device via a fourth pipeline; the outlet of the first solid-liquid separation device is connected to the top of the concentration crystallization kettle via a fifth pipeline; the outlet at the bottom of the concentration crystallization kettle is connected to the inlet of the second solid-liquid separation device via a sixth pipeline; the outlet of the second solid-liquid separation device is connected to the electrodialysis device via a seventh pipeline; the concentrated water outlet of the electrodialysis device is connected to the top of the concentration crystallization kettle via an eighth pipeline; the fresh water outlet of the electrodialysis device is connected to the top of the hot melting kettle via a ninth pipeline; the top of the concentration crystallization kettle is connected to an external tail gas treatment device via a tenth pipeline; and the water tank is connected to the hot melting kettle via an eleventh pipeline.

[0011] As a preferred technical solution, the hot melting kettle is equipped with a first thermometer, a first pressure gauge, a first stirring device, and a first pressure relief valve; a first jacket is provided on the outer circumferential surface of the hot melting kettle, and a first coil is provided on the first jacket. The inlet of the first coil is connected to the first steam inlet pipe, and the outlet of the first coil is connected to the first steam outlet pipe.

[0012] As a preferred technical solution, a level gauge is installed on the water tank, a third shut-off valve is installed on the eleventh pipeline, and a Y-type filter is installed on the second pipeline.

[0013] This technical solution can remove impurities from the second pipeline and prevent blockage.

[0014] As a preferred technical solution, the mother liquor filtration device includes a cartridge filter.

[0015] Alternatively, the mother liquor filtration device includes a filter assembly comprising two cartridge filters connected in parallel.

[0016] Alternatively, the mother liquor filtration device includes a first screen filter connected in series, a filter group, and the filter group includes two cartridge filters connected in parallel.

[0017] As a preferred technical solution, the first solid-liquid separation device and the second solid-liquid separation device have the same structure, both including a frame, a fixed drum with a first opening that is horizontally fixed on the frame, an outer rotating drum with a second opening that is coaxially arranged inside the fixed drum, and an inner rotating drum with a third opening at the right end that is coaxially arranged inside the outer rotating drum; the first opening, the second opening, and the third opening all face left or right.

[0018] The outer drum has several fine holes on its circumferential sidewall; the inner drum has several coarse holes on its circumferential sidewall; the outer surface of the inner drum's circumferential sidewall has pusher threads; the outer drum is connected to the outer drum drive motor on the frame, and the inner drum is connected to the inner drum drive motor on the frame.

[0019] A conveyor belt for crystallizing is provided on the side of the inner drum away from the frame; several rollers are provided at the bottom of the conveyor belt; a baffle is provided vertically on the conveyor belt, and a liquid inlet pipe is transversely passed through the center of the baffle; the baffle closes the first opening; a discharge gap is provided between the baffle and the peripheral wall of the inner drum; a gap is provided between the baffle and the peripheral wall of the outer drum; a solid discharge port is provided between the peripheral walls of the outer drum and the peripheral walls of the inner drum below the baffle; a liquid baffle ring is coaxially connected to the right side of the first opening on the inner side of the peripheral wall of the fixed drum; and a liquid outlet is provided at the bottom of the peripheral wall of the fixed drum.

[0020] The power output shaft of the inner drum drive motor is connected to the horizontal rotating shaft, which is connected to the center of the inner drum on the side away from the baffle. A rotating sleeve is fitted on the horizontal rotating shaft, and the rotating sleeve is connected to the center of the outer drum on the side away from the baffle. A horizontal through hole is provided at the center of the fixed drum on the side away from the baffle. The rotating sleeve is connected to the horizontal through hole by a bearing, and the rotating sleeve is connected to the power output wheel of the outer drum drive motor by a belt.

[0021] In this technical solution, when the crystalline liquid enters the inner drum, the inner drum rotates at a first speed along the central axis of the horizontal rotating shaft. The crystalline grains are thrown into the outer drum through the coarse holes, while the fine crystalline particles enter the solid discharge port through the discharge gap. As the outer drum rotates at a second speed along the central axis of the horizontal rotating shaft, the fine crystalline particles are retained in the space between the outer and inner drums. Utilizing the speed difference between the outer and inner drums, they are pushed to the solid discharge port by the pusher screw. The liquid is thrown into the space between the outer and inner drums and discharged from the liquid outlet. The crystalline solids are finally output from the conveyor belt. Several rollers are provided at the bottom of the conveyor belt. When cleaning the equipment is required, the conveyor belt moves away from the frame, and the baffle no longer closes the first opening, facilitating cleaning of the outer and inner drums. This utility model device features good material flowability, easy cleaning, and continuous operation.

[0022] Using this technical solution, the crystallization vessel is equipped with a second thermometer, a second pressure gauge, and a second stirring device; a second jacket is provided on the outer circumferential surface of the crystallization vessel, and a second coil is provided on the second jacket. The inlet of the second coil is connected to the first chilled brine inlet pipe, and the outlet of the second coil is connected to the first chilled brine outlet pipe.

[0023] Using this technical solution, a second screen filter and a second vacuum pump are installed on the fifth pipeline; a third vacuum pump is installed on the eighth pipeline; and a fourth vacuum pump is installed on the ninth pipeline.

[0024] Using this technical solution, the inner wall of the concentration crystallization kettle is equipped with several pH measuring devices; the top of the concentration crystallization kettle is connected to the sulfuric acid tank through a hose, and the hose is equipped with an injection pump and a first shut-off valve; the pH measuring devices are connected to a display set on the top surface of the concentration crystallization kettle through a line.

[0025] Using this technical solution, the concentration crystallization kettle is equipped with a third thermometer, a third pressure gauge, a third stirring device, and a second pressure relief valve. A third jacket is provided on the outer circumference of the concentration crystallization kettle, and a third coil is installed on the third jacket. The inlet of the third coil is connected to the second chilled brine inlet pipe, and the outlet of the third coil is connected to the second chilled brine outlet pipe. A fourth coil is installed on the third jacket, with its inlet connected to the second steam inlet pipe and its outlet connected to the second steam outlet pipe. Attached Figure Description

[0026] Figure 1This is a schematic diagram of a preferred embodiment of the crude taurine purification and treatment device of this utility model.

[0027] Figure 2 yes Figure 1 A magnified view of part A.

[0028] Figure 3 yes Figure 2 A magnified view of part E.

[0029] Figure 4 yes Figure 3 A magnified view of part F.

[0030] Figure 5 yes Figure 4 A magnified view of part I.

[0031] Figure 6 yes Figure 3 A magnified view of part G.

[0032] Figure 7 yes Figure 3 A magnified view of part H.

[0033] Figure 8 yes Figure 2 A magnified view of part J.

[0034] Figure 9 yes Figure 2 A magnified view of part K.

[0035] Figure 10 yes Figure 9 A magnified view of part L.

[0036] Figure 11 yes Figure 1 A magnified view of part B.

[0037] Figure 12 yes Figure 1 A magnified view of part C.

[0038] Figure 13 yes Figure 1 A magnified view of part D.

[0039] Figure 14 yes Figure 13 A magnified view of part M.

[0040] Figure 15 yes Figure 14 A magnified view of part P.

[0041] Figure 16 yes Figure 13 A magnified view of part N.

[0042] Figure 17 yes Figure 13 A magnified view of part O.

[0043] Figure 18 This is a schematic diagram of a preferred embodiment of the crude taurine purification and treatment device of this utility model.

[0044] Figure 19 yes Figure 18 A magnified view of part Q.

[0045] Figure 20 yes Figure 18 A magnified view of the R part.

[0046] Figure 21 This is a schematic diagram of a preferred embodiment of the crude taurine purification and treatment device of this utility model.

[0047] Among them: hot melt kettle-1; activated carbon inlet-11; first thermometer-12; first pressure gauge-13; first stirring device-14; first jacket-15; first coil-16; first steam inlet-17; first steam outlet-18; first pressure relief valve-19;

[0048] Mother liquor filtration device-2; Cartridge filter-21; First screen filter-22; Y-type filter-23;

[0049] Crystallization kettle-3;

[0050] First solid-liquid separation device - 4; Frame - 41; First opening - 42; Fixed drum - 43; Second opening - 44; Outer drum - 45; Third opening - 46; Inner drum - 47; Fine hole - 48; Coarse hole - 49; Pushing thread - 410; Outer drum drive motor - 411; Inner drum drive motor - 412; Conveyor belt - 413; Roller - 414; Baffle plate - 415; Liquid inlet pipe - 416; Discharge gap - 417; Gap - 418; Solid discharge port - 419; Liquid retaining ring - 420; Liquid outlet - 421; Horizontal rotating shaft - 422; Rotating sleeve - 423; Belt - 424; Power output wheel - 425; Bearing - 426;

[0051] Concentration crystallization kettle-5; Third thermometer-51; Third pressure gauge-52; Third stirring device-53; Second pressure relief valve-54; Third jacket-55; Third coil-56; Second chilled brine inlet pipe-57; Second chilled brine outlet pipe-58; Fourth coil-59; Second steam inlet pipe-510; Second steam outlet pipe-511;

[0052] Second solid-liquid separation device-6;

[0053] First pipeline - 71; Second pipeline - 72; Third pipeline - 73; First shut-off valve - 74; Second shut-off valve - 75; First vacuum pump - 76; Fourth pipeline - 77; Fifth pipeline - 78; Sixth pipeline - 79; Seventh pipeline - 710; Eighth pipeline - 711; Ninth pipeline - 712; Tenth pipeline - 713; Eleventh pipeline - 714; Third shut-off valve - 715; Second screen filter - 716; Second vacuum pump - 717; Third vacuum pump - 718; Fourth vacuum pump - 719;

[0054] Electrodialysis unit-8;

[0055] Water tank-9; Level gauge-91;

[0056] pH measuring device-101; sulfuric acid tank-102; injection pump-103; first shut-off valve-104; wiring-105; display-106; hose-107. Detailed Implementation

[0057] The present invention will now be further described in conjunction with the accompanying drawings and embodiments.

[0058] Example 1. As... Figure 1-17 As shown, a continuous purification treatment device for crude taurine includes a hot melting kettle 1, a mother liquor filtration device 2, a crystallization kettle 3, a first solid-liquid separation device 4, a concentrated crystallization kettle 5, and a second solid-liquid separation device 6. The top of the hot melting kettle 1 is provided with an inlet 11 for activated carbon and crude taurine, and the top of the hot melting kettle 1 is connected to a water tank 9. The outlet at the bottom of the hot melting kettle 1 is connected to the mother liquor filtration device 2 through a first pipeline 71, and the mother liquor filtration device 2 is connected to the top of the hot melting kettle 1 through a second pipeline 72. The second pipeline 72 is connected to the top of the crystallization kettle 3 through a third pipeline 73.

[0059] like Figure 12 As shown, a first shut-off valve 74 is installed on the third pipeline 73.

[0060] like Figure 2 As shown, a second shut-off valve 75 is provided between the third pipe 73 on the second pipe 72 and the top of the hot melt kettle 1. Figure 11 As shown, a first vacuum pump 76 is installed on the second pipeline 72.

[0061] like Figure 1 As shown, the discharge port at the bottom of the crystallization vessel 3 is connected to the inlet of the first solid-liquid separation device 4; the discharge port of the first solid-liquid separation device 4 is connected to the concentration crystallization vessel 5; and the discharge port at the bottom of the concentration crystallization vessel 5 is connected to the inlet of the second solid-liquid separation device 6.

[0062] like Figure 8 As shown, the concentration and crystallization vessel 5 is equipped with several pH measuring devices 101. For example... Figure 1As shown, the top of the concentration crystallization kettle 5 is connected to the sulfuric acid tank 102. The outlet of the second solid-liquid separation device 6 is connected to the electrodialysis device 8 via an electric heating device 81. The concentrate outlet of the electrodialysis device 8 is connected to the concentration crystallization kettle 5, and the desalination outlet of the electrodialysis device 8 is connected to the hot melting kettle 1. The concentration crystallization kettle 5 is externally connected to a tail gas treatment device. Specifically, the concentrate outlet of the electrodialysis device 8 is connected to the top of the concentration crystallization kettle 5 via an eighth pipe 711, and the desalination outlet of the electrodialysis device 8 is connected to the top of the hot melting kettle 1 via a ninth pipe 712.

[0063] like Figure 1 , Figure 12 As shown, the discharge port at the bottom of the crystallization vessel 3 is connected to the inlet of the first solid-liquid separation device 4 via the fourth pipeline 77; the discharge port of the first solid-liquid separation device 4 is connected to the top of the concentration crystallization vessel 5 via the fifth pipeline 78.

[0064] like Figure 2 As shown, the outlet at the bottom of the concentration crystallization kettle 5 is connected to the inlet of the second solid-liquid separation device 6 via the sixth pipe 79, and the outlet of the second solid-liquid separation device 6 is connected to the electrodialysis device 8 via the seventh pipe 710. The top of the concentration crystallization kettle 5 is connected to an external tail gas treatment device via the tenth pipe 713; the water tank 9 is connected to the hot melting kettle 1 via the eleventh pipe 714. The tail gas treatment device is not shown in the figure.

[0065] like Figure 9-10 As shown, the hot melt kettle 1 is equipped with a first thermometer 12, a first pressure gauge 13, a first stirring device 14, and a first pressure relief valve 19. A first jacket 15 is provided on the outer peripheral surface of the hot melt kettle 1. A first coil 16 is provided on the first jacket 15. The inlet of the first coil 16 is connected to the first steam inlet pipe 17, and the outlet of the first coil 16 is connected to the first steam outlet pipe 18.

[0066] like Figure 9 As shown, a level gauge 91 is installed on the water tank 9, and a third shut-off valve 715 is installed on the eleventh pipeline 714. Figure 11 As shown, a Y-type filter 23 is installed on the second pipeline 72. This technical solution can remove impurities from the second pipeline 72.

[0067] like Figure 11 As shown, the mother liquor filtration device 2 includes a filter group, which includes two cartridge filters 21 connected in parallel.

[0068] The first solid-liquid separation device 4 and the second solid-liquid separation device 6 have the same structure. For example... Figure 13-17As shown, the first solid-liquid separation device 4 includes a frame 41, a fixed drum 43 with a first opening 42 horizontally fixed on the frame 41, an outer rotating drum 45 with a second opening 44 coaxially disposed within the fixed drum 43, and an inner rotating drum 47 with a third opening 46 at its right end coaxially disposed within the outer rotating drum 45. Figure 13 , Figure 16 , Figure 17 The first opening 42, the second opening 44, and the third opening 46 all face to the right.

[0069] like Figure 16-17 As shown, the outer drum 45 has several fine holes 48 on its circumferential sidewall; the inner drum 47 has several coarse holes 49 on its circumferential sidewall; and the outer surface of the inner drum 47's circumferential sidewall has pusher threads 410. Figure 13 The outer drum 45 is connected to the outer drum drive motor 411 on the frame 41, and the inner drum 47 is connected to the inner drum drive motor 412 on the frame 41.

[0070] like Figure 13 , 16 As shown in Figure -17, a conveyor belt 413 for crystallizing is provided on the side of the inner drum 47 away from the frame; several rollers 414 are provided at the bottom end of the conveyor belt 413; a baffle 415 is vertically provided on the conveyor belt 413, and a liquid inlet pipe 416 is transversely passed through the center of the baffle 415. The baffle 415 closes the first opening 42 of the fixed drum 43. A discharge gap 417 is provided between the baffle 415 and the peripheral wall of the inner drum 47; a gap 418 is provided between the baffle 415 and the peripheral wall of the outer drum 45; a solid discharge port 419 is provided between the peripheral wall of the outer drum 45 and the peripheral wall of the inner drum 47 below the baffle 415; a liquid-retaining ring 420 is coaxially connected to the right side of the first opening 42 on the inner side of the peripheral wall of the fixed drum 43. Figure 12 As shown, a liquid outlet 421 is provided at the bottom end of the side wall of the fixed drum 43.

[0071] like Figure 12-13 As shown, the power output shaft of the inner drum drive motor 412 is connected to the horizontal rotating shaft 422, and the horizontal rotating shaft 422 is connected to the center of the inner drum 47 on the side away from the baffle 415; a rotating sleeve 423 is fitted on the horizontal rotating shaft 422, and the rotating sleeve 423 is connected to the center of the outer drum 45 on the side away from the baffle 415; a horizontal through hole is provided at the center of the fixed drum 43 on the side away from the baffle 415, and the rotating sleeve 423 is connected to the horizontal through hole through the bearing 426. The rotating sleeve 423 is connected to the power output wheel 425 of the outer drum drive motor 411 through the belt 424.

[0072] In this embodiment, as Figure 13-17The first opening 42, the second opening 44, and the third opening 46 of the first solid-liquid separation device 4 all face to the right; the fixed drum 43 includes a fixed drum peripheral sidewall and a fixed drum bottom sidewall, the fixed drum bottom sidewall seals the left end opening of the fixed drum peripheral sidewall, and the right end opening of the fixed drum peripheral sidewall is the first opening 42; the outer rotating drum 45 includes an outer rotating drum peripheral sidewall and an outer rotating drum bottom sidewall, the outer rotating drum bottom sidewall seals the left end opening of the outer rotating drum peripheral sidewall, and the right end opening of the outer rotating drum peripheral sidewall is the second opening 44; the inner rotating drum 47 includes an inner rotating drum peripheral sidewall and an inner rotating drum bottom sidewall, the inner rotating drum bottom sidewall seals the left end opening of the inner rotating drum peripheral sidewall, and the right end opening of the inner rotating drum peripheral sidewall is the third opening 46.

[0073] like Figure 3-7 As shown, the second solid-liquid separation device 6 has the same structure as the first solid-liquid separation device 4, except that the first opening 42, the second opening 44, and the third opening 46 of the second solid-liquid separation device 6 all face to the left.

[0074] like Figure 3-7 As shown, the fixed drum 43 of the second solid-liquid separation device 6 includes a fixed drum peripheral sidewall and a fixed drum bottom sidewall. The fixed drum bottom sidewall seals the right end opening of the fixed drum peripheral sidewall, and the left end opening of the fixed drum peripheral sidewall is the first opening 42. The outer rotating drum 45 includes an outer rotating drum peripheral sidewall and an outer rotating drum bottom sidewall. The outer rotating drum bottom sidewall seals the right end opening of the outer rotating drum peripheral sidewall, and the left end opening of the outer rotating drum peripheral sidewall is the second opening 44. The inner rotating drum 47 includes an inner rotating drum peripheral sidewall and an inner rotating drum bottom sidewall. The inner rotating drum bottom sidewall seals the right end opening of the inner rotating drum peripheral sidewall, and the left end opening of the inner rotating drum peripheral sidewall is the third opening 46.

[0075] Using this technical solution, when the crystalline liquid enters the inner drum 47, the inner drum 47 rotates at a first speed along the central axis of the horizontal rotating shaft 422. The crystalline grains are thrown into the outer drum 45 through the coarse holes 49, and the fine crystalline particles enter the solid discharge port 419 through the discharge gap 417. As the outer drum 45 rotates at a second speed along the central axis of the horizontal rotating shaft 422, the fine crystalline particles are left in the space between the outer drum 45 and the inner drum 47. Utilizing the speed difference between the outer drum 45 and the inner drum 47, they are pushed to the solid discharge port 419 by the pusher screw 410. The liquid is thrown into the space between the outer drum 45 and the inner drum 47 and discharged from the liquid outlet 421. The crystalline solid is finally output from the conveyor belt 413. The bottom end of the conveyor belt 413 is equipped with several rollers 414. When the equipment needs to be cleaned, the conveyor belt 413 moves away from the frame, and the baffle 415 no longer closes the first opening 42, which facilitates the cleaning of the outer drum 45 and the inner drum 47. This utility model device has the characteristics of good material flowability, simple cleaning, and continuous operation.

[0076] like Figure 12As shown, the crystallization vessel 3 is equipped with a second thermometer 31, a second pressure gauge 32, and a second stirring device 33; a second jacket 34 is provided on the outer peripheral surface of the crystallization vessel 3, and a second coil 35 is provided on the second jacket 34. The inlet of the second coil 35 is connected to the first chilled brine inlet pipe 36, and the outlet of the second coil 35 is connected to the first chilled brine outlet pipe 37.

[0077] like Figure 3 As shown, the eighth pipe 711 is equipped with a third vacuum pump 718, and the ninth pipe 712 is equipped with a fourth vacuum pump 719.

[0078] like Figure 1 , Figure 8 As shown, the inner wall of the concentration crystallization vessel 5 is equipped with three pH measuring devices 101; the top of the concentration crystallization vessel 5 is connected to the sulfuric acid tank 102 through a hose 107, and the hose 107 is equipped with an injection pump 103 and a first shut-off valve 104; the pH measuring devices 101 are connected to a display 106 installed on the top surface of the concentration crystallization vessel 5 through a line 105.

[0079] Figure 8 As shown, the concentration crystallization kettle 5 is equipped with a third thermometer 51, a third pressure gauge 52, a third stirring device 53, and a second pressure relief valve 54; a third jacket 55 is provided on the outer peripheral surface of the concentration crystallization kettle 5, and a third coil 56 is provided on the third jacket 55. The inlet of the third coil 56 is connected to the second chilled brine inlet pipe 57, and the outlet of the third coil 56 is connected to the second chilled brine outlet pipe 58.

[0080] The third jacket 55 is provided with a fourth coil 59. The inlet of the fourth coil 59 is connected to the second steam inlet pipe 510, and the outlet of the fourth coil 59 is connected to the second steam outlet pipe 511.

[0081] Its beneficial effects are as follows: activated carbon and crude taurine are added through inlet 11, water is added to tank 9, and the mixture is heated in hot dissolving kettle 1 to form mother liquor. The mother liquor is then repeatedly filtered through mother liquor filtration device 2 to remove impurities such as activated carbon. The clean mother liquor is then cooled and crystallized in crystallization kettle 3. The cooled and crystallized liquid is then separated into solid and liquid in the first solid-liquid separation device. The separated solid is clean taurine, and the separated liquid is taurine wastewater, the main component of which is ammonium salt.

[0082] Taurine wastewater enters a concentration crystallization kettle 5, where it is heated and concentrated, then cooled and crystallized. The crystallized material is then fed into a second solid-liquid separation device 6 for solid-liquid separation. The resulting solid is ammonium salt, primarily ammonium sulfate, obtained through cooling crystallization. During heating and concentration, evaporation is stopped when the supersaturation of the material in the concentration crystallization kettle 5 reaches 1.05. During cooling crystallization, sulfuric acid is injected into the concentration crystallization kettle 5, maintaining a pH of 5. The material temperature is cooled to 5°C. A pH measuring device controls the sulfate ion concentration, ensuring that ammonia ions are fully absorbed to form ammonium sulfate during cooling crystallization. The solid obtained by the second solid-liquid separation device is primarily ammonium sulfate crystals. The separated liquid is first heated to 40°C by an electric heating device 81, then fed into an electrodialysis device 8. The concentrated liquid outlet of the electrodialysis device 8 is further concentrated at the material inlet at the top of the concentration crystallization kettle 5. The freshwater outlet of the electrodialysis device 8 is connected to a hot melt kettle 1, where the freshwater is utilized. Because the liquid entering the electrodialysis unit has a relatively high temperature, the increased temperature leads to a higher ion transport rate in the water, while the reduced resistance of the membrane and solution increases the desalination capacity and rate, thus improving the quality of the freshwater. The separated liquid is first heated by an electric heating device 81, ensuring that no heat is wasted, whether it enters the hot melting kettle 1 or the concentration crystallization kettle 5, resulting in energy savings. The concentration crystallization kettle 5 is equipped with several pH measuring devices 101, and its top is connected to a sulfuric acid tank 102. Precise control of sulfuric acid flow into the concentration crystallization kettle 5 ensures that all ammonia ions react to form ammonium sulfate, which then crystallizes out, resulting in thorough wastewater treatment. This invention continuously crystallizes salts from wastewater, and the entire treatment process is primarily physical, without introducing new impurities into the system. The entire process is continuous, fast, and relatively low-cost.

[0083] Example 2. (As shown) Figure 18-20 As shown, the difference between this embodiment and Embodiment 1 is that the mother liquor filtration device 2 includes a cartridge filter 21. A second screen filter 716 and a second vacuum pump 717 are provided on the fifth pipeline 78.

[0084] Example 3. (As shown) Figure 21 As shown, the difference between this embodiment and embodiment 1 is that the mother liquor filtration device 2 includes a first screen filter 22 connected in series and a filter group, the filter group including two cartridge filters 21 connected in parallel.

Claims

1. A continuous purification treatment device for crude taurine, characterized in that: The system includes a hot melt kettle (1), with an activated carbon and crude taurine inlet (11) at the top. The top of the hot melt kettle (1) is connected to a water tank (9). The outlet at the bottom of the hot melt kettle (1) is connected to a mother liquor filtration device (2) via a first pipeline (71). The mother liquor filtration device (2) is connected to the top of the hot melt kettle (1) via a second pipeline (72). The second pipeline (72) is connected to the top of a crystallization kettle (3) via a third pipeline (73). A first shut-off valve (74) is provided on the third pipeline (73). A second shut-off valve (75) is provided between the third pipeline (73) on the second pipeline (72) and the top of the hot melt kettle (1). A first vacuum pump (76) is provided on the second pipeline (72). The discharge port at the bottom of the crystallization vessel (3) is connected to the inlet of the first solid-liquid separation device (4); the discharge port of the first solid-liquid separation device (4) is connected to the concentrated crystallization vessel (5); the discharge port at the bottom of the concentrated crystallization vessel (5) is connected to the inlet of the second solid-liquid separation device (6); the concentrated crystallization vessel (5) is equipped with several pH measuring devices (101), and the top of the concentrated crystallization vessel (5) is connected to the sulfuric acid tank (102); the discharge port of the second solid-liquid separation device (6) is connected to the electrodialysis device (8) through the electric heating device (81), the concentrated water outlet of the electrodialysis device (8) is connected to the concentrated crystallization vessel (5), and the fresh water outlet of the electrodialysis device (8) is connected to the hot melt vessel (1); the concentrated crystallization vessel (5) is connected to an external tail gas treatment device.

2. The continuous purification treatment device for crude taurine as described in claim 1, characterized in that: The discharge port at the bottom of the crystallization vessel (3) is connected to the inlet of the first solid-liquid separation device (4) via the fourth pipeline (77); the discharge port of the first solid-liquid separation device (4) is connected to the top of the concentration crystallization vessel (5) via the fifth pipeline (78); the discharge port at the bottom of the concentration crystallization vessel (5) is connected to the inlet of the second solid-liquid separation device (6) via the sixth pipeline (79); the discharge port of the second solid-liquid separation device (6) is connected to the electrodialysis device (8) via the seventh pipeline (710); the concentrated water outlet of the electrodialysis device (8) is connected to the top of the concentration crystallization vessel (5) via the eighth pipeline (711); the fresh water outlet of the electrodialysis device (8) is connected to the top of the hot melt vessel (1) via the ninth pipeline (712); the top of the concentration crystallization vessel (5) is connected to the tail gas treatment device via the tenth pipeline (713); the water tank (9) is connected to the hot melt vessel (1) via the eleventh pipeline (714).

3. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The hot melt kettle (1) is equipped with a first thermometer (12), a first pressure gauge (13), a first stirring device (14), and a first pressure relief valve (19); the hot melt kettle (1) is equipped with a first jacket (15) on its outer peripheral surface, and a first coil (16) is provided on the first jacket (15). The inlet of the first coil (16) is connected to the first steam inlet pipe (17), and the outlet of the first coil (16) is connected to the first steam outlet pipe (18).

4. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: A level gauge (91) is installed on the water tank (9), and a third shut-off valve (715) is installed on the eleventh pipeline (714); a Y-type filter (23) is installed on the second pipeline (72).

5. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The mother liquor filtration device (2) includes a cartridge filter (21). Alternatively, the mother liquor filtration device (2) includes a filter assembly comprising two parallel cartridge filters (21). Alternatively, the mother liquor filtration device (2) includes a first screen filter (22) connected in series and a filter group, the filter group including two cartridge filters (21) connected in parallel.

6. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The first solid-liquid separation device (4) and the second solid-liquid separation device (6) have the same structure, both including a frame (41), a fixed drum (43) with a first opening (42) fixed horizontally on the frame (41), an outer drum (45) with a second opening (44) coaxially arranged in the fixed drum (43), and an inner drum (47) with a third opening (46) at the right end coaxially arranged in the outer drum (45); the first opening (42), the second opening (44), and the third opening (46) all face left or right. The outer drum (45) has several fine holes (48) on its circumferential sidewall; the inner drum (47) has several coarse holes (49) on its circumferential sidewall; the outer surface of the inner drum (47) has push threads (410); the outer drum (45) is connected to the outer drum drive motor (411) on the frame (41), and the inner drum (47) is connected to the inner drum drive motor (412) on the frame (41); A conveyor belt (413) for crystallizing is provided on the side of the inner drum (47) away from the frame; several rollers (414) are provided at the bottom end of the conveyor belt (413); a baffle (415) is provided vertically on the conveyor belt (413), and a liquid inlet pipe (416) is passed through the center of the baffle (415); the baffle (415) closes the first opening (42); a discharge gap (417) is provided between the baffle (415) and the peripheral wall of the inner drum (47); a gap (418) is provided between the baffle (415) and the peripheral wall of the outer drum (45); a solid discharge port (419) is provided between the peripheral wall of the outer drum (45) and the peripheral wall of the inner drum (47) below the baffle (415); a liquid baffle ring (420) is coaxially connected to the right side of the first opening (42) on the inner side of the peripheral wall of the fixed drum (43), and a liquid outlet (421) is provided at the bottom end of the peripheral wall of the fixed drum (43). The power output shaft of the inner drum drive motor (412) is connected to the horizontal rotating shaft (422), and the horizontal rotating shaft (422) is connected to the center of the inner drum (47) on the side away from the baffle (415). A rotating sleeve (423) is fitted on the horizontal rotating shaft (422), and the rotating sleeve (423) is connected to the center of the outer drum (45) on the side away from the baffle (415). A horizontal through hole is provided at the center of the fixed drum (43) on the side away from the baffle (415). The rotating sleeve (423) is connected to the horizontal through hole through the bearing (426), and the rotating sleeve (423) is connected to the power output wheel (425) of the outer drum drive motor (411) through the belt (424).

7. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The crystallization vessel (3) is equipped with a second thermometer (31), a second pressure gauge (32), and a second stirring device (33); a second jacket (34) is provided on the outer circumferential surface of the crystallization vessel (3), and a second coil (35) is provided on the second jacket (34). The inlet of the second coil (35) is connected to the first frozen brine inlet pipe (36), and the outlet of the second coil (35) is connected to the first frozen brine outlet pipe (37).

8. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The fifth pipeline (78) is equipped with a second screen filter (716) and a second vacuum pump (717); the eighth pipeline (711) is equipped with a third vacuum pump (718); and the ninth pipeline (712) is equipped with a fourth vacuum pump (719).

9. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The inner wall of the concentration crystallization kettle (5) is provided with several pH measuring devices (101); the top of the concentration crystallization kettle (5) is connected to the sulfuric acid tank (102) through a hose (107), and the hose (107) is provided with an injection pump (103) and a first shut-off valve (104); the pH measuring device (101) is connected to a display (106) set on the top surface of the concentration crystallization kettle (5) through a line (105).

10. The continuous purification treatment device for crude taurine as described in claim 2, characterized in that: The concentration crystallization kettle (5) is equipped with a third thermometer (51), a third pressure gauge (52), a third stirring device (53), and a second pressure relief valve (54); the outer circumferential surface of the concentration crystallization kettle (5) is provided with a third jacket (55), the third jacket (55) is provided with a third coil (56), the inlet of the third coil (56) is connected to the second chilled brine inlet pipe (57), and the outlet of the third coil (56) is connected to the second chilled brine outlet pipe (58); The third jacket (55) is provided with a fourth coil (59), the inlet of the fourth coil (59) is connected to the second steam inlet pipe (510), and the outlet of the fourth coil (59) is connected to the second steam outlet pipe (511).

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