Continuous purification treatment device for crude taurine
By designing a continuous purification process including a hot melt kettle, a mother liquor filtration device, a crystallization kettle, a solid-liquid separation device and an electrodialysis device, the problem of discontinuous impurity treatment in crude taurine production was solved, and efficient and rapid impurity removal and production efficiency improvement were achieved.
Patent Information
- Application Number
- CN202510952438.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-09-12
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, the activated carbon decolorization of crude taurine and the treatment of impurities generated by thermal dissolution are discontinuous, resulting in low production efficiency.
A continuous purification process was designed, which included a hot melt kettle, a mother liquor filtration device, a crystallization kettle, a solid-liquid separation device, and an electrodialysis device. Impurities were removed through multi-stage filtration, crystallization, and electrodialysis technology to achieve continuous operation.
The impurities are completely removed, the taurine production efficiency is improved, the cost is reduced, and the entire treatment process is continuous and rapid.
Smart Images
Figure CN120618016A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of taurine preparation, in particular to a device for continuous purification of crude taurine. Background Art
[0002] Taurine, also known as taurine and 2-aminoethanesulfonic acid, is a conditionally essential amino acid for the human body. As a non-protein amino acid, taurine has a significant physiological impact on the body's motor ability and a range of unique cardiovascular functions, enhancing physical fitness and relieving fatigue. It also has anti-inflammatory, antipyretic, analgesic, anticonvulsant, and blood pressure-lowering properties. It also has beneficial effects on infant brain development, nerve conduction, visual function, and calcium absorption. Therefore, taurine is gaining widespread commercial and social value in the fields of food and health, medicine and health, and organic synthesis. Its market demand is growing rapidly, and its application prospects are promising.
[0003] Currently, in the production of taurine synthesis, crude taurine needs to be decolorized with activated carbon and then separated into solid and liquid. In the existing technology, the impurities generated by activated carbon decolorization and thermal dissolution cannot be continuously treated, resulting in low taurine production efficiency. Summary of the Invention
[0004] The object of the present invention is to provide a continuous purification treatment device for crude taurine in view of the shortcomings of the prior art, which has the advantages of thorough impurity treatment and continuous operation.
[0005] The technical solutions adopted in the present invention are as follows.
[0006] A crude taurine continuous purification treatment device is characterized by comprising: a hot melt kettle, wherein the top of the hot melt kettle is provided with activated carbon and crude taurine addition ports, and the top of the hot melt kettle is connected to a water tank; a discharge port at the bottom end of the hot melt kettle is connected to a mother liquor filter device via a first pipeline, and the mother liquor filter device is connected to the top of the hot melt kettle via a second pipeline; the second pipeline is connected to the top of the crystallization kettle via a third pipeline, and a first stop valve is provided on the third pipeline; a second stop valve is provided on the second pipeline between the third pipeline and the top of the hot melt kettle; and a first vacuum pump is provided on the second pipeline.
[0007] The discharge port at the bottom end of the crystallization kettle is connected to the liquid inlet of the first solid-liquid separation device; the liquid outlet of the first solid-liquid separation device is connected to the concentration crystallization kettle; the liquid outlet at the bottom of the concentration crystallization kettle is connected to the liquid inlet of the second solid-liquid separation device; a plurality of pH measuring devices are provided on the concentration crystallization kettle, and the top of the concentration crystallization kettle is connected to the sulfuric acid tank; the liquid 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, and the fresh water outlet of the electrodialysis device is connected to the hot melt kettle; the concentration crystallization kettle is externally connected to an exhaust gas treatment device.
[0008] The method has the following beneficial effects: activated carbon and crude taurine are added from activated carbon and crude taurine inlets, water is added to a water tank, and hot-melted in a hot-melt kettle to form a mother liquor; the mother liquor is repeatedly filtered through a mother liquor filtering device to remove impurities such as the activated carbon; the clean mother liquor is then cooled and crystallized in a crystallization kettle; the cooled and crystallized liquid is subjected to solid-liquid separation in a 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] The taurine wastewater enters the concentrator and crystallizer, where it is heated and concentrated, then cooled and crystallized. Finally, the crystallized material is fed into a second solid-liquid separator for solid-liquid separation. The resulting solid is a cooled and crystallized ammonium salt, primarily ammonium sulfate. The separated liquid is first heated to 40°C by an electric heater before being fed into an electrodialysis unit. The concentrated liquid outlet of the electrodialysis unit is connected to the material inlet at the top of the concentrator and crystallizer for further concentration. The fresh water outlet of the electrodialysis unit is connected to the hot melt unit, allowing fresh water to be utilized. Because the liquid entering the electrodialysis unit is relatively hot, the increased temperature, the increased ion transport rate in the water, and the reduced resistance between the membrane and the solution increase the amount of salt removed, increasing the desalination rate and improving the fresh water quality. The separated liquid is first heated by the electric heater. This ensures that no heat is wasted, whether entering the hot melt unit or the concentrator and crystallizer, resulting in energy savings. The concentration and crystallization kettle is equipped with several pH measuring devices. The top of the concentration and crystallization kettle is connected to a sulfuric acid tank. The precise flow of sulfuric acid into the concentration and crystallization kettle allows all ammonia ions to react to form ammonium sulfate and crystallize out, resulting in a relatively thorough wastewater treatment. The present invention continuously crystallizes salts from wastewater. The entire treatment process is primarily physical, without introducing new impurities into the system. The entire treatment process is continuous, the treatment speed is fast, and the cost is relatively low.
[0010] As an optimal technical solution, the discharge port at the bottom of the crystallization kettle is connected to the liquid inlet of the first solid-liquid separation device through a fourth pipeline; the liquid outlet of the first solid-liquid separation device is connected to the top of the concentration crystallization kettle through a fifth pipeline; the liquid outlet at the bottom of the concentration crystallization kettle is connected to the liquid inlet of the second solid-liquid separation device through a sixth pipeline, the liquid outlet of the second solid-liquid separation device is connected to the electrodialysis device through a seventh pipeline, the concentrated water outlet of the electrodialysis device is connected to the top of the concentration crystallization kettle through an eighth pipeline, the fresh water outlet of the electrodialysis device is connected to the top of the hot melt kettle through a ninth pipeline; the top of the concentration crystallization kettle is connected to an external exhaust gas treatment device through a tenth pipeline; the water tank is connected to the hot melt kettle through an eleventh pipeline.
[0011] As an optimal technical solution, the hot melt kettle is provided 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 peripheral surface of the hot melt 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 an optimal technical solution, a liquid level gauge is provided on the water tank, a third stop valve is provided on the eleventh pipeline, and a Y-type filter is provided on the second pipeline.
[0013] By adopting this technical solution, impurities in the second pipeline can be removed to prevent the second pipeline from being blocked.
[0014] As a preferred technical solution, the mother liquid filtration device includes a filter cartridge filter. Alternatively, the mother liquor filtering device includes a filter group, the filter group includes two filter cartridge filters connected in parallel, Alternatively, the mother liquid filtering device includes a first screen filter and a filter group connected in series, and the filter group includes two filter element filters connected in parallel.
[0015] As a preferred technical solution, the first solid-liquid separation device and the second solid-liquid separation device have the same structure, both comprising a frame, a fixed drum horizontally fixed to the frame and provided with a first opening, an outer rotary drum coaxially arranged in the fixed drum and provided with a second opening, and an inner rotary drum coaxially arranged in the outer rotary drum and provided with a third opening at the right end; the first opening, the second opening, and the third opening are all facing left or right; The outer drum is provided with a plurality of fine holes on its circumferential wall; the inner drum is provided with a plurality of coarse holes on its circumferential wall; the outer surface of the inner drum is provided with a push thread; 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; A conveyor belt for crystallized materials is provided on the side of the inner drum away from the frame; a plurality of rollers are provided at the bottom end of the conveyor belt; a baffle is provided vertically on the conveyor belt, and a liquid inlet pipe is passed horizontally through the center of the baffle; the baffle closes the first opening; a discharge gap is provided between the baffle and the circumferential wall of the inner drum; a gap is provided between the baffle and the circumferential wall of the outer drum; a solid discharge port is provided below the baffle between the circumferential wall of the outer drum and the circumferential wall of the inner drum; a liquid baffle ring is coaxially connected to the right side of the first opening on the inner side surface of the circumferential wall of the fixed drum, and a liquid outlet is provided at the bottom end of the circumferential wall of the fixed drum; The power output shaft of the inner drum driving motor is connected to the transverse rotating shaft, and the transverse rotating shaft is connected to the center of the inner drum away from the baffle plate; a rotating sleeve is mounted on the transverse rotating shaft, and the rotating sleeve is connected to the center of the outer drum away from the baffle plate; a transverse through hole is provided in the center of the fixed drum away from the baffle plate, and the rotating sleeve is connected to the transverse through hole through a bearing, and the rotating sleeve is connected to the power output wheel of the outer drum driving motor through a belt.
[0016] With this technical solution, when the crystallizing liquid enters the inner drum, the inner drum rotates at a first speed along the central axis of the transverse axis. Crystallized grains are ejected through the coarse holes into the outer drum, while fine crystallized particles pass through the discharge gap and into the solid discharge port. As the outer drum rotates at a second speed along the central axis of the transverse axis, the fine crystallized particles are retained in the space between the outer and inner drums. Taking advantage of the speed difference between the two, they are pushed to the solid discharge port by the pusher screw. Liquid is ejected into the space between the outer and inner drums and discharged through the liquid outlet. The crystallized solid is ultimately discharged via a conveyor belt. Several rollers are installed at the bottom end of the conveyor belt. When the equipment needs to be cleaned, 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. The device of this invention features good material flowability, simple cleaning, and continuous operation.
[0017] Using this technical solution, a second thermometer, a second pressure gauge, and a second stirring device are provided on the crystallization kettle; a second jacket is provided on the outer surface of the crystallization kettle, 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.
[0018] By adopting this technical solution, a second screen filter and a second vacuum pump are provided on the fifth pipeline; a third vacuum pump is provided on the eighth pipeline; and a fourth vacuum pump is provided on the ninth pipeline.
[0019] Using this technical solution, several pH measuring devices are installed on the inner side wall of the concentration crystallization kettle; 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 device is connected to a display arranged on the top surface of the concentration crystallization kettle through a circuit.
[0020] This technical solution includes a third thermometer, a third pressure gauge, a third stirring device, and a second pressure relief valve on the concentrating crystallization kettle. A third jacket is located on the outer circumference of the concentrating crystallization kettle, which is equipped with a third coil. 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 located on the third jacket. The inlet of the fourth coil is connected to the second steam inlet pipe, and the outlet of the fourth coil is connected to the second steam outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of a preferred embodiment of the crude taurine purification treatment device of the present invention.
[0022] Figure 2 yes Figure 1 A partial enlarged view of part A.
[0023] Figure 3 yes Figure 2 A partial enlarged view of part E.
[0024] Figure 4 yes Figure 3 A partial enlarged view of part F.
[0025] Figure 5 yes Figure 4 A partial enlarged view of part I.
[0026] Figure 6 yes Figure 3 A partial enlarged view of part G.
[0027] Figure 7 yes Figure 3 A partial enlarged view of part H.
[0028] Figure 8 yes Figure 2 A partial enlarged view of part J.
[0029] Figure 9 yes Figure 2 A partial enlarged view of the K part.
[0030] Figure 10 yes Figure 9 A partial enlarged view of the L part.
[0031] Figure 11 yes Figure 1 A partial enlarged view of part B.
[0032] Figure 12 yes Figure 1 A partial enlarged view of part C.
[0033] Figure 13 yes Figure 1 A partial enlarged view of part D.
[0034] Figure 14 yes Figure 13 A partial enlarged view of part M.
[0035] Figure 15 yes Figure 14 A partial enlarged view of part P.
[0036] Figure 16 yes Figure 13 A local enlarged view of part N.
[0037] Figure 17 yes Figure 13 A partial enlarged view of part O.
[0038] Figure 18 It is a structural schematic diagram of a preferred embodiment of the crude taurine purification treatment device of the present invention.
[0039] Figure 19 yes Figure 18 A partial enlarged view of the Q part.
[0040] Figure 20 yes Figure 18 A partial enlarged view of the R part.
[0041] Figure 21 It is a structural schematic diagram of a preferred embodiment of the crude taurine purification treatment device of the present invention.
[0042] Wherein: 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 pipe-17; first steam outlet pipe-18; first pressure relief valve-19; Mother liquor filtration device-2; cartridge filter-21; first screen filter-22; Y-type filter-23; Crystallization kettle-3; 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; pusher screw 410; outer drum drive motor 411; inner drum drive motor 412; conveyor belt 413; roller 414; baffle 415; liquid inlet pipe 416; discharge gap 417; gap 418; solid discharge port 419; liquid baffle ring 420; liquid outlet 421; horizontal shaft 422; rotating sleeve 423; belt 424; power take-off pulley 425; bearing 426; 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 57; second chilled brine outlet 58; fourth coil 59; second steam inlet 510; second steam outlet 511; Second solid-liquid separation device-6; First pipeline 71; second pipeline 72; third pipeline 73; first stop valve 74; second stop 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 stop valve 715; second screen filter 716; second vacuum pump 717; third vacuum pump 718; fourth vacuum pump 719; Electrodialysis unit-8; Water tank - 9; Liquid level gauge - 91; pH measuring device 101; sulfuric acid tank 102; injection pump 103; first stop valve 104; line 105; display 106; hose 107. DETAILED DESCRIPTION
[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0044] Example 1. Figure 1-17 As shown, a crude taurine continuous purification treatment device includes a hot melt kettle 1, a mother liquor filtration device 2, a crystallization kettle 3, a first solid-liquid separation device 4, a concentration crystallization kettle 5, and a second solid-liquid separation device 6; an activated carbon and crude taurine addition port 11 is provided on the top of the hot melt kettle 1, and the top of the hot melt kettle 1 is connected to a water tank 9; the discharge port at the bottom end of the hot melt 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 melt 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.
[0045] like Figure 12 As shown, a first stop valve 74 is provided on the third pipeline 73 .
[0046] like Figure 2 As shown, a second stop valve 75 is provided between the third pipeline 73 and the top of the hot melt kettle 1 on the second pipeline 72. Figure 11 As shown, a first vacuum pump 76 is provided on the second pipeline 72 .
[0047] like Figure 1 As shown, the discharge port at the bottom end of the crystallization kettle 3 is connected to the liquid inlet of the first solid-liquid separation device 4; the liquid outlet of the first solid-liquid separation device 4 is connected to the concentration crystallization kettle 5; and the liquid outlet at the bottom of the concentration crystallization kettle 5 is connected to the liquid inlet of the second solid-liquid separation device 6.
[0048] like Figure 8 As shown, the concentration crystallization kettle 5 is provided with several pH measuring devices 101. Figure 1 As shown, the top of the concentration and crystallization kettle 5 is connected to the sulfuric acid tank 102. The liquid outlet of the second solid-liquid separation device 6 is connected to the electrodialysis unit 8 via an electric heating device 81. The concentrated water outlet of the electrodialysis unit 8 is connected to the concentration and crystallization kettle 5, and the fresh water outlet of the electrodialysis unit 8 is connected to the thermosol kettle 1. The concentration and crystallization kettle 5 is externally connected to an exhaust gas treatment device. Specifically, the concentrated water outlet of the electrodialysis unit 8 is connected to the top of the concentration and crystallization kettle 5 via an eighth pipeline 711, and the fresh water outlet of the electrodialysis unit 8 is connected to the top of the thermosol kettle 1 via a ninth pipeline 712.
[0049] like Figure 1 、 Figure 12As shown, the discharge port at the bottom end of the crystallization kettle 3 is connected to the liquid inlet of the first solid-liquid separation device 4 through the fourth pipeline 77; the liquid outlet of the first solid-liquid separation device 4 is connected to the top of the concentration crystallization kettle 5 through the fifth pipeline 78.
[0050] like Figure 2 As shown, the liquid outlet at the bottom of the concentration and crystallization kettle 5 is connected to the liquid inlet of the second solid-liquid separation device 6 via a sixth pipeline 79. The liquid outlet of the second solid-liquid separation device 6 is connected to the electrodialysis unit 8 via a seventh pipeline 710. The top of the concentration and crystallization kettle 5 is connected to an external tail gas treatment device via a tenth pipeline 713. The water tank 9 is connected to the hot melt kettle 1 via an eleventh pipeline 714. The tail gas treatment device is not shown in the figure.
[0051] like Figure 9-10 As shown, the hot melt kettle 1 is provided 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, 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.
[0052] like Figure 9 As shown, a liquid level gauge 91 is provided on the water tank 9, and a third stop valve 715 is provided on the eleventh pipeline 714. Figure 11 As shown, a Y-type filter 23 is provided on the second pipeline 72. By adopting this technical solution, impurities in the second pipeline 72 can be removed.
[0053] like Figure 11 As shown, the mother liquor filtering device 2 includes a filter group, and the filter group includes two filter cartridge filters 21 connected in parallel.
[0054] The first solid-liquid separation device 4 and the second solid-liquid separation device 6 have the same structure. Figure 13-17 As shown, the first solid-liquid separation device 4 includes a frame 41, a fixed drum 43 fixed horizontally on the frame 41 and having a first opening 42, an outer drum 45 coaxially arranged in the fixed drum 43 and having a second opening 44, and an inner drum 47 coaxially arranged in the outer drum 45 and having a third opening 46 at its right end. Figure 13 、 Figure 16 、 Figure 17 The first opening 42, the second opening 44, and the third opening 46 are all facing right.
[0055] like Figure 16-17 As shown, the outer drum 45 is provided with a plurality of fine holes 48 on its peripheral wall; the inner drum 47 is provided with a plurality of coarse holes 49 on its peripheral wall; and the outer surface of the inner drum 47 is provided with a push thread 410 on its peripheral wall. Figure 13The outer drum 45 is connected to the outer drum driving motor 411 on the frame 41 , and the inner drum 47 is connected to the inner drum driving motor 412 on the frame 41 .
[0056] like Figure 13 、 16 As shown in Figure 17, a conveyor belt 413 for crystallized materials is provided on the side of the inner drum 47 away from the frame; a plurality of 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 passed through the center of the baffle 415 horizontally. 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 side wall of the inner drum 47; a gap 418 is provided between the baffle 415 and the side wall of the outer drum 45; a solid discharge port 419 is provided between the side wall of the outer drum 45 and the side wall of the inner drum 47 below the baffle 415; a liquid blocking ring 420 is coaxially connected to the right side of the first opening 42 on the inner side of the side wall of the fixed drum 43. As shown in Figure 17, a conveyor belt 413 for crystallized materials is provided on the side of the inner drum 47 and the bottom of the baffle 415; a liquid blocking ring 420 is coaxially connected to the right side of the first opening 42 on the inner side of the side wall of the fixed drum 43. Figure 12 As shown, a liquid outlet 421 is provided at the bottom end of the peripheral side wall of the fixed drum 43 .
[0057] like Figure 12-13 As shown, the power output shaft of the inner drum drive motor 412 is connected to the transverse shaft 422, and the transverse shaft 422 is connected to the center of the inner drum 47 away from the baffle 415; a rotating sleeve 423 is mounted on the transverse shaft 422, and the rotating sleeve 423 is connected to the center of the outer drum 45 away from the baffle 415; a transverse through hole is provided in the center of the fixed drum 43 away from the baffle 415, and the rotating sleeve 423 is connected to the transverse through hole through a bearing 426, and the rotating sleeve 423 is connected to the power output pulley 425 of the outer drum drive motor 411 through a belt 424.
[0058] In this embodiment, Figure 13-17 The first opening 42, the second opening 44 and the third opening 46 of the first solid-liquid separation device 4 are all facing right; the fixed drum 43 includes a fixed drum side wall and a fixed drum bottom side wall, the fixed drum bottom side wall seals the left end opening of the fixed drum side wall, and the right end opening of the fixed drum side wall is the first opening 42; the outer drum 45 includes an outer drum side wall and an outer drum bottom side wall, the outer drum bottom side wall seals the left end opening of the outer drum side wall, and the right end opening of the outer drum side wall is the second opening 44; the inner drum 47 includes an inner drum side wall and an inner drum bottom side wall, the inner drum bottom side wall seals the left end opening of the inner drum side wall, and the right end opening of the inner drum side wall is the third opening 46.
[0059] like Figure 3-7 As shown, the second solid-liquid separator 6 has the same structure as the first solid-liquid separator 4 , except that the first opening 42 , the second opening 44 and the third opening 46 of the second solid-liquid separator 6 are all facing left.
[0060] like Figure 3-7As shown, the fixed drum 43 of the second solid-liquid separation device 6 includes a fixed drum circumferential side wall and a fixed drum bottom side wall, the fixed drum bottom side wall seals the right end opening of the fixed drum circumferential side wall, and the left end opening of the fixed drum circumferential side wall is the first opening 42; the outer drum 45 includes an outer drum circumferential side wall and an outer drum bottom side wall, the outer drum bottom side wall seals the right end opening of the outer drum circumferential side wall, and the left end opening of the outer drum circumferential side wall is the second opening 44; the inner drum 47 includes an inner drum circumferential side wall and an inner drum bottom side wall, the inner drum bottom side wall seals the right end opening of the inner drum circumferential side wall, and the left end opening of the inner drum circumferential side wall is the third opening 46.
[0061] With this technical solution, when the crystallized liquid enters inner drum 47, inner drum 47 rotates at a first speed along the central axis of transverse axis 422. Crystallized grains are flung through coarse holes 49 into outer drum 45, while crystallized fine particles pass through discharge gap 417 and enter solid discharge port 419. As outer drum 45 rotates at a second speed along the central axis of transverse axis 422, the crystallized fine particles are retained in the space between outer and inner drums 45, 47. Taking advantage of the speed difference between the two, they are pushed to solid discharge port 419 by pusher screws 410. The liquid is flung into the space between outer and inner drums 45, 47, and discharged from liquid outlet 421. The crystallized solid is ultimately discharged from conveyor belt 413. The bottom end of the conveyor belt 413 is provided with a plurality of 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. The device of the present invention has the characteristics of good material flowability, simple cleaning, and continuous operation.
[0062] like Figure 12 As shown, the crystallization kettle 3 is provided 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 kettle 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.
[0063] like Figure 3 As shown, the eighth pipeline 711 is provided with a third vacuum pump 718 , and the ninth pipeline 712 is provided with a fourth vacuum pump 719 .
[0064] like Figure 1 、 Figure 8 As shown, three pH measuring devices 101 are provided on the inner wall of the concentration crystallization kettle 5; the top of the concentration crystallization kettle 1 is connected to the sulfuric acid tank 102 via a hose 107, and the hose 107 is provided with an injection pump 103 and a first stop valve 104; the pH measuring device 101 is connected to a display 106 provided on the top surface of the concentration crystallization kettle 1 via a line 105.
[0065] Figure 8As shown, the concentration crystallization kettle 5 is provided 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.
[0066] A fourth coil 59 is provided on the third jacket 55 . 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 .
[0067] The beneficial effects are as follows: activated carbon and crude taurine are added from an activated carbon and crude taurine inlet 11, water is added to a water tank 9, and thermally dissolved in a thermal dissolution kettle 1 to form a mother liquor. The mother liquor is repeatedly filtered through a mother liquor filtering device 2 to remove impurities such as the activated carbon; the clean mother liquor is then cooled and crystallized in a crystallization kettle 3; the cooled and crystallized liquid is subjected to solid-liquid separation in a 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.
[0068] The taurine wastewater enters the concentration and crystallization kettle 5, where it is heated and concentrated, then cooled and crystallized. Finally, the crystallized material is fed into the second solid-liquid separator 6 for solid-liquid separation. The resulting solid is a cooled and crystallized ammonium salt, primarily ammonium sulfate. During the heating and concentration process, evaporation is stopped when the supersaturation of the material in the concentration and crystallization kettle 5 reaches 1.05. As the material in the concentration and crystallization kettle 5 cools and crystallizes, sulfuric acid is injected into the concentration and crystallization kettle 5, setting the pH value to 5 and cooling the material to 5°C. A pH measuring device is provided to control the sulfate ion concentration, ensuring that ammonium ions are fully absorbed to form ammonium sulfate during the cooling and crystallization process. The solid obtained from the second solid-liquid separator is primarily ammonium sulfate crystals. The separated liquid is first heated to 40°C by an electric heater 81 and then fed into an electrodialysis unit 8. The concentrated liquid outlet of the electrodialysis unit 8 is connected to the material inlet at the top of the concentration and crystallization kettle 5 for further concentration. The fresh water outlet of the electrodialysis unit 8 is connected to the hot melt kettle 1, allowing the fresh water to be utilized. Since the temperature of the liquid entering the electrodialysis device is relatively high, the increase in temperature, the increase in the ion transport rate in the water, and the reduction in the resistance of the membrane and the solution will increase the amount of desalination, increase the desalination rate, and improve the quality of fresh water. The separated liquid is first heated by an electric heating device 81. Whether it enters the hot melt kettle 1 or the concentration crystallization kettle 5, heat will not be wasted, which is more energy-saving. The concentration crystallization kettle 5 is provided with a number of pH measuring devices 101. The top of the concentration crystallization kettle 5 is connected to the sulfuric acid tank 102. The concentration crystallization kettle 5 can be controlled by precise sulfuric acid entering the concentration crystallization kettle 5, so that all ammonia ions react to generate ammonium sulfate and crystallize out, and the waste liquid treatment is relatively thorough. The present invention continuously crystallizes the salts in the wastewater. The entire treatment process is mainly based on physical means, and no new impurities are introduced into the system. The entire treatment process is continuous, the treatment speed is fast, and the relative cost is low.
[0069] Example 2. Figure 18-20 As shown, the difference between this embodiment and embodiment 1 is that the mother liquid filtering device 2 includes a filter element 21. The fifth pipeline 78 is provided with a second filter screen filter 716 and a second vacuum pump 717.
[0070] Example 3. Figure 21 As shown, the difference between this embodiment and embodiment 1 is that the mother liquid filtering device 2 includes a first screen filter 22 connected in series and a filter group, and the filter group includes two filter element filters 21 connected in parallel.
Claims
1. A crude taurine continuous purification treatment device, characterized by: The invention comprises a hot melt kettle (1), wherein an activated carbon and crude taurine addition port (11) is provided on the top of the hot melt kettle (1), and the top of the hot melt kettle (1) is connected to a water tank (9); a discharge port at the bottom of the hot melt kettle (1) is connected to a mother liquor filter device (2) through a first pipeline (71), and the mother liquor filter device (2) is connected to the top of the hot melt 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), and a first stop valve (74) is provided on the third pipeline (73); a second stop valve (75) is provided between the third pipeline (73) and the top of the hot melt kettle (1) on the second pipeline (72); and a first vacuum pump (76) is provided on the second pipeline (72); The discharge port at the bottom end of the crystallization kettle (3) is connected to the liquid inlet of the first solid-liquid separation device (4); the liquid outlet of the first solid-liquid separation device (4) is connected to the concentration crystallization kettle (5); the liquid outlet at the bottom of the concentration crystallization kettle (5) is connected to the liquid inlet of the second solid-liquid separation device (6); a plurality of pH measuring devices (101) are provided on the concentration crystallization kettle (5), and the top end of the concentration crystallization kettle (5) is connected to the sulfuric acid tank (102); the liquid outlet 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 concentration crystallization kettle (5), and the fresh water outlet of the electrodialysis device (8) is connected to the hot melt kettle (1); the concentration crystallization kettle (5) is externally connected to the tail gas treatment device.
2. The crude taurine purification device according to claim 1, characterized in that: The discharge port at the bottom end of the crystallization kettle (3) is connected to the liquid inlet of the first solid-liquid separation device (4) through the fourth pipeline (77); the liquid outlet of the first solid-liquid separation device (4) is connected to the top of the concentration crystallization kettle (5) through the fifth pipeline (78); the liquid outlet at the bottom end of the concentration crystallization kettle (5) is connected to the liquid inlet of the second solid-liquid separation device (6) through the sixth pipeline (79); the liquid outlet of the second solid-liquid separation device (6) is connected to the electrodialysis device (8) through the seventh pipeline (710); the concentrated water outlet of the electrodialysis device (8) is connected to the top of the concentration crystallization kettle (5) through the eighth pipeline (711); the fresh water outlet of the electrodialysis device (8) is connected to the top of the hot melt kettle (1) through the ninth pipeline (712); the top of the concentration crystallization kettle (5) is connected to the tail gas treatment device through the tenth pipeline (713); the water tank (9) is connected to the hot melt kettle (1) through the eleventh pipeline (714).
3. The crude taurine purification device according to claim 2, characterized in that: The hot melt kettle (1) is provided 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), and a first coil (16) is provided on the first jacket (15); an inlet of the first coil (16) is connected to a first steam inlet pipe (17), and an outlet of the first coil (16) is connected to a first steam outlet pipe (18).
4. The crude taurine purification device according to claim 2, characterized in that: The water tank (9) is provided with a liquid level gauge (91), the eleventh pipeline (714) is provided with a third stop valve (715), and the second pipeline (72) is provided with a Y-type filter (23).
5. The crude taurine purification device according to claim 2, characterized in that: The mother liquor filtering device (2) includes a cartridge filter (21), Alternatively, the mother liquor filtering device (2) comprises a filter group, wherein the filter group comprises two filter cartridge filters (21) connected in parallel. Alternatively, the mother liquid filtering device (2) comprises a first screen filter (22) connected in series and a filter group, wherein the filter group comprises two cartridge filters (21) connected in parallel.
6. The crude taurine purification device according to claim 2, characterized in that: The first solid-liquid separation device (4) and the second solid-liquid separation device (6) have the same structure, and both include a frame (41), a fixed drum (43) fixed horizontally on the frame (41) and provided with a first opening (42), an outer rotating drum (45) coaxially arranged in the fixed drum (43) and provided with a second opening (44), and an inner rotating drum (47) coaxially arranged in the outer rotating drum (45) and provided with a third opening (46) at the right end; the first opening (42), the second opening (44), and the third opening (46) are all facing left or right. A plurality of fine holes (48) are provided on the peripheral side wall of the outer drum (45); a plurality of coarse holes (49) are provided on the peripheral side wall of the inner drum (47); a pusher thread (410) is provided on the outer surface of the peripheral side wall of the inner drum (47); the outer drum (45) is connected to an outer drum drive motor (411) on the frame (41), and the inner drum (47) is connected to an inner drum drive motor (412) on the frame (41); A conveyor belt (413) for crystallized materials is provided on the side of the inner drum (47) away from the frame; a plurality of 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) transversely; 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 retaining ring (420) is coaxially connected to the right side of the first opening (42) on the inner side surface 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 driving motor (412) is connected to the transverse rotation shaft (422), and the transverse rotation shaft (422) is connected to the center of the inner drum (47) away from the baffle (415); a rotating sleeve (423) is mounted on the transverse rotation shaft (422), and the rotating sleeve (423) is connected to the center of the outer drum (45) away from the baffle (415); a transverse through hole is provided at the center of the fixed drum (43) away from the baffle (415), and the rotating sleeve (423) is connected to the transverse through hole through a bearing (426), and the rotating sleeve (423) is connected to the power output wheel (425) of the outer drum driving motor (411) through a belt (424).
7. The crude taurine purification device according to claim 2, characterized in that: The crystallization kettle (3) is provided 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 kettle (3); a second coil (35) is provided on the second jacket (34); an inlet of the second coil (35) is connected to the first chilled brine inlet pipe (36), and an outlet of the second coil (35) is connected to the first chilled brine outlet pipe (37).
8. The crude taurine purification device according to claim 2, characterized in that: The fifth pipeline (78) is provided with a second screen filter (716) and a second vacuum pump (717); the eighth pipeline (711) is provided with a third vacuum pump (718); and the ninth pipeline (712) is provided with a fourth vacuum pump (719).
9. The crude taurine purification device according to claim 2, characterized in that: The inner wall of the concentration crystallization kettle (5) is provided with a plurality of pH measuring devices (101); the top of the concentration crystallization kettle (1) is connected to the sulfuric acid tank (102) via a hose (107), and the hose (107) is provided with an injection pump (103) and a first stop valve (104); the pH measuring device (101) is connected to a display (106) provided on the top surface of the concentration crystallization kettle (1) via a line (105).
10. The crude taurine purification device according to claim 2, characterized in that: The concentration crystallization kettle (5) is provided 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); A fourth coil (59) is provided on the third jacket (55), 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).