Evaporative crystallization apparatus

Abstract

The application provides an evaporation crystallization device, which comprises a barrel, a circulating mechanism, an over-temperature mechanism and a steam spraying mechanism. The evaporation crystallization device provided by the application is provided with the barrel, can heat the solution in the evaporation cavity through the evaporation cavity, is provided with the circulating mechanism, can guide the steam at the top end of the evaporation cavity to the bottom end of the evaporation cavity through the steam discharge pipe, is provided with the over-temperature mechanism in the evaporation cavity, can connect the supplementary solution through the second connecting port of the second channel, and is communicated with the steam discharge pipe through the first connecting port of the first channel. The steam spraying mechanism is provided, the steam and the heated supplementary solution can be sprayed into the evaporation cavity through the solution channel communicated with the second channel and the steam channel communicated with the first channel, the evaporation efficiency is high, the adaptability is good, and the practicality is good.

Description

Technical Field

[0001] This invention belongs to the field of chemical separation technology, specifically relating to an evaporation crystallization apparatus. Background Technology

[0002] An evaporation crystallization apparatus is a chemical device used to crystallize solutes in a solution. Its working principle is to achieve supersaturation of the solution by evaporating a portion of the solvent. The evaporator crystallizer heats the solution, causing the solvent to evaporate, thereby increasing the concentration of the solute in the solution until a supersaturated state is reached, at which point the solute precipitates out in crystal form.

[0003] In existing technologies, evaporative crystallizers typically achieve supersaturation of the solution by evaporating part of the solvent, thereby obtaining solute crystals. To improve evaporation efficiency, the evaporated gas is reused as a heating medium. However, during the production process, the solution needs to be continuously added to the evaporative crystallizer. The added solution is at a low temperature. When the low-temperature solution mixes with the solution in the evaporative crystallizer, it will lower the overall temperature of the solution in the evaporative crystallizer, reduce the evaporation efficiency, and result in poor adaptability and practicality. Summary of the Invention

[0004] This invention provides an evaporation crystallization apparatus, which aims to solve the problems of low overall solution temperature, low evaporation efficiency, and poor adaptability when adding low-temperature solutions in existing evaporation crystallization methods.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an evaporation crystallization apparatus, comprising:

[0006] The cylinder has an evaporation chamber, with a feed inlet at the top of the evaporation chamber and a discharge outlet at the bottom of the evaporation chamber; a heating unit for heating the solution in the evaporation chamber is provided on the side wall of the cylinder.

[0007] A circulation mechanism is provided on the outside of the cylinder, with its top end connected to the top of the evaporation chamber and its bottom end provided with a steam discharge pipe;

[0008] A temperature control mechanism is disposed in the evaporation chamber. The bottom end of the temperature control mechanism extends through the side wall of the cylinder. The temperature control mechanism has a first channel and a second channel. The end of the temperature control mechanism extending out of the cylinder is provided with a first connection port communicating with the first channel and a second connection port communicating with the second channel. The first connection port is connected to the steam discharge pipe. The second connection port is used to connect to the replenishment solution.

[0009] The steam spraying mechanism is provided in multiple forms, and the multiple steam spraying mechanisms are fixed at the top of the overheating mechanism. Each steam spraying mechanism has a solution channel communicating with the second channel and a steam channel communicating with the first channel. The steam spraying mechanism is used to spray steam and the heated supplementary solution into the evaporation chamber.

[0010] In one possible implementation, the over-temperature mechanism includes:

[0011] An outer sleeve is connected to the steam exhaust pipe; the end of the outer sleeve extending out of the evaporation chamber is provided with the first connection port;

[0012] An internal tube, disposed inside the outer tube and coaxially arranged with the outer tube, is used to communicate with the replenishment solution. The lumen of the internal tube is the second channel, and the channel between the internal tube and the outer tube is the first channel. The end of the internal tube extending out of the evaporation chamber is the second connection port.

[0013] The portion of the combination of the outer tube and the inner tube located within the evaporation chamber is arranged in a spiral shape, with the spiral axis running vertically.

[0014] In one possible implementation, each of the steam spray mechanisms includes:

[0015] An inner tube, vertically arranged, is connected to the top end of the built-in tube and is used to allow the solution to pass through; the cavity of the inner tube is the solution channel.

[0016] An outer tube is fitted over the outer side of the inner tube, with one end connected to the outer sleeve for steam to pass through. The channel between the outer tube and the inner tube is the steam channel.

[0017] Multiple annular support nets are provided, and the multiple annular support nets are spaced apart between the inner tube and the outer tube along the axial direction of the inner tube, so as to keep the inner tube and the outer tube always spaced apart;

[0018] A connector is provided at the other end of the inner tube and the outer tube, for separating the solution in the inner tube from the vapor between the outer tube and the inner tube;

[0019] The steam spray structure is rotatably mounted on the connector and is used to rotate under the influence of steam between the inner tube and the outer tube, so that the solution in the inner tube is evenly sprayed into the evaporation chamber.

[0020] In one possible implementation, the connector includes:

[0021] A steam connection cap, fixed to the other end of the outer pipe, has an open vent chamber;

[0022] A solution connection cap is located inside the gas outlet chamber, fixedly connected to the steam connection cap, and fixed at the other end of the inner tube, communicating with the inner tube;

[0023] The steam connection cap and the solution connection cap are provided with multiple connecting rods, which are used to fix the relative position of the solution connection cap inside the steam connection cap.

[0024] In one possible implementation, the steam spray structure includes:

[0025] A rotator is rotatably mounted on the solution connection cap, with its rotation axis coaxial with the inner tube, and the rotator has a hollow rotation cavity;

[0026] The fan blades are provided in multiple ways, and the multiple fan blades are arranged at intervals in a ring along the axis of rotation.

[0027] The spray head is fixedly connected to the rotator and located inside the rotating cavity. One end is connected to the inner tube, and the other end extends upward in a vertical direction. It is used to drive the spray head to rotate when the rotating fan blades and the rotator rotate under the drive of steam, so that the solution in the spray head can be sprayed.

[0028] In one possible implementation, the spray head has a vertical section and a plurality of horizontal sections, the bottom end of the vertical section is fixed to the rotator and communicates with the inner tube; the plurality of horizontal sections are arranged circumferentially at intervals along the axis of the vertical section at the top of the vertical section;

[0029] The vertical section and the plurality of horizontal sections are hollow structures, and together they form a spray chamber, which is connected to the solution inside the inner tube.

[0030] In one possible implementation, the loop mechanism includes:

[0031] The circulation tube has one end connected to the top of the evaporation chamber and the other end connected to the bottom of the evaporation chamber;

[0032] A circulation pump, installed on the circulation pipe, is used to transport the steam at the top of the evaporation chamber to the bottom of the evaporation chamber.

[0033] In one possible implementation, the heating unit is a resistance heater.

[0034] In one possible implementation, the bottom of the cylinder is provided with a support frame for supporting the cylinder.

[0035] In one possible implementation, a plurality of support mesh rings are provided between the outer tube and the inner tube, and the plurality of support mesh rings are used to keep the outer tube and the inner tube always spaced apart.

[0036] Compared with the prior art, this implementation includes a cylindrical body that heats the solution within the evaporation chamber; a circulation mechanism that guides steam from the top of the evaporation chamber to the bottom via a steam exhaust pipe; an overheating mechanism within the evaporation chamber that connects to a supplementary solution via a second connection port of a second channel and to the steam exhaust pipe via a first connection port of the first channel; and a steam spraying mechanism that sprays steam and the heated supplementary solution into the evaporation chamber via a solution channel connected to the second channel and a steam channel connected to the first channel. This results in high evaporation efficiency, good adaptability, and good practicality. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the evaporation crystallization apparatus provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the internal structure of the evaporation crystallization apparatus provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the internal structure of the steam spray mechanism of the evaporation crystallization apparatus provided in an embodiment of the present invention;

[0040] Figure 4 A top view schematic diagram of the steam spray mechanism of the evaporation crystallization apparatus provided in an embodiment of the present invention;

[0041] Explanation of reference numerals in the attached figures:

[0042] 10. Cylinder; 11. Evaporation chamber; 12. Feed inlet; 13. Discharge outlet; 14. Heating unit; 15. Support frame; 20. Circulation mechanism; 21. Circulation pipe; 22. Circulation pump; 30. Overheating mechanism; 31. Outer casing; 32. Internal pipe; 40. Steam spray mechanism; 41. Inner pipe; 42. Outer pipe; 43. Annular support net; 44. Connector; 441. Steam connection cap; 442. Solution connection cap; 45. Steam spray structure; 451. Rotator; 452. Rotating fan blade; 453. Spray head. Detailed Implementation

[0043] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0044] Please refer to the following: Figures 1 to 4 The evaporation crystallization apparatus provided by the present invention will now be described. The evaporation crystallization apparatus includes: a cylinder 10, a circulation mechanism 20, a superheating mechanism 30, and a steam spraying mechanism 40. The cylinder 10 has an evaporation chamber 11, with a feed inlet 12 communicating with the top of the evaporation chamber 11 and a discharge outlet 13 communicating with the bottom of the evaporation chamber 11. A heating unit 14 for heating the solution in the evaporation chamber 11 is provided on the side wall of the cylinder 10. The circulation mechanism 20 is disposed outside the cylinder 10, with its top communicating with the top of the evaporation chamber 11 and a steam discharge pipe at its bottom. The superheating mechanism 30 is disposed in the evaporation chamber 11, with its bottom end extending through the side wall of the cylinder 10. The superheating mechanism 30 has a first channel and a second channel. The end of the superheating mechanism 30 extending out of the cylinder 10 has a first connection port communicating with the first channel and a second connection port communicating with the second channel. The first connection port communicates with the steam discharge pipe. The second connection port is used to connect to a replenishing solution. Multiple steam spraying mechanisms 40 are provided, and multiple steam spraying mechanisms 40 are fixed on the top of the overheating mechanism 30. Each steam spraying mechanism 40 has a solution channel communicating with the second channel and a steam channel communicating with the first channel. The steam spraying mechanism 40 is used to spray steam and the heated supplementary solution into the evaporation chamber 11.

[0045] The evaporation crystallization apparatus provided in this embodiment, compared with the prior art, features a cylinder 10 for heating the solution within the evaporation chamber 11. A circulation mechanism 20 guides steam from the top of the evaporation chamber 11 to its bottom via a steam exhaust pipe. An overheating mechanism 30 is installed in the evaporation chamber 11, connecting a replenishing solution via a second connection port of a second channel and a steam exhaust pipe via a first connection port of a first channel. A steam spraying mechanism 40 sprays steam and the heated replenishing solution into the evaporation chamber 11 through a solution channel connected to the second channel and a steam channel connected to the first channel. This apparatus offers high evaporation efficiency, good adaptability, and practicality.

[0046] In some embodiments, the above-mentioned over-temperature mechanism 30 may employ, for example... Figure 1 , Figure 2 The structure shown. See also Figure 1 , Figure 2 The overheating mechanism 30 includes an outer tube 31 and an inner tube 32. The outer tube 31 is connected to a steam exhaust pipe. A first connection port is provided on the end of the outer tube 31 that extends out of the evaporation chamber 11. The inner tube 32 is disposed inside the outer tube 31 and is coaxially arranged with the outer tube 31. It is used to connect to the replenishment solution. The cavity of the inner tube 32 is a second channel, and the channel between the inner tube 32 and the outer tube 31 is a first channel. The end of the inner tube 32 that extends out of the evaporation chamber 11 is the second connection port.

[0047] The portion of the combination of the outer tube 31 and the inner tube 32 located inside the evaporation chamber 11 is arranged in a spiral shape, with the spiral axis along the vertical direction.

[0048] The outer tube 31 and the inner tube 32 can be understood as concentric tubes. The outer tube 31 can be connected to the steam discharge pipe and can be connected to the steam discharge pipe through the first connection port. The inner tube 32 can be connected to the replenishment solution. The part of the inner tube 32 located outside the cylinder 10 extends out of the outer tube 31 and connects to the replenishment solution, so as to be connected to the replenishment solution through the second connection port.

[0049] In some embodiments, the steam spraying mechanism 40 described above may employ, for example... Figure 2 , Figure 3 The structure shown. See also Figure 2 , Figure 3 Each steam spraying mechanism 40 includes: an inner tube 41, an outer tube 42, an annular support net 43, a connector 44, and a steam spraying structure 45. The inner tube 41 is vertically arranged and connected to the top end of the inner tube 32, allowing solution to pass through; the cavity of the inner tube 41 serves as a solution channel. The outer tube 42 is sleeved outside the inner tube 41, with one end connected to the outer sleeve 31, allowing steam to pass through; the channel between the outer tube 42 and the inner tube 41 serves as a steam channel. Multiple annular support nets 43 are provided, spaced apart along the axis of the inner tube 41 between the inner tube 41 and the outer tube 42, ensuring that the inner tube 41 and outer tube 42 are always spaced apart. The connector 44 is located at the other end of the inner tube 41 and the outer tube 42, separating the solution inside the inner tube 41 from the steam between the outer tube 42 and the inner tube 41. The steam spray structure 45 is rotatably mounted on the connector 44 and is used to rotate under the drive of the steam between the inner tube 41 and the outer tube 42, so that the solution in the inner tube 41 is evenly sprayed into the evaporation chamber 11.

[0050] The inner tube 41 and outer tube 42 can be understood as concentric sleeves, with the inner tube 41 allowing the solution to pass through and the outer tube 42 allowing the steam to pass through. The annular support mesh 43 ensures that the inner tube 41 and outer tube 42 are always spaced apart. The connector 44 separates the solution inside the inner tube 41 from the steam between the outer tube 42 and the inner tube 41. The steam spray structure 45 rotates under the influence of the steam between the inner tube 41 and outer tube 42, ensuring that the solution inside the inner tube 41 is evenly sprayed into the evaporation chamber 11.

[0051] In some embodiments, the connector 44 described above may be as follows: Figure 2 , Figure 3 The structure shown. See also Figure 2 , Figure 3The connector 44 includes a steam connector 441 and a solution connector 442. The steam connector 441 is fixed to the other end of the outer tube 42 and has an open venting chamber. The solution connector 442 is located inside the venting chamber, fixedly connected to the steam connector 441, and fixed to the other end of the inner tube 41, communicating with the inner tube 41.

[0052] The steam connection cap 441 and the solution connection cap 442 are provided with multiple connecting rods, which are used to fix the relative position of the solution connection cap 442 within the steam connection cap 441.

[0053] The steam connection cap 441 can be understood as a sleeve fitted onto the outer pipe 42, having a vertically arranged through cavity, the cavity of which serves as an outlet cavity. The solution connection cap 442 can be understood as a sleeve fitted onto the inner pipe 41, communicating with the inner pipe 41 to allow solution to pass through. The multiple connecting rods between the steam connection cap 441 and the solution connection cap 442 can be understood as support rods, ensuring that the solution connection cap 442 remains centered on the steam connection cap 441.

[0054] In some embodiments, the steam spray structure 45 described above can be as follows: Figure 3 The structure shown. See also Figure 3 The steam spray structure 45 includes a rotor 451, rotating fan blades 452, and a spray head 453. The rotor 451 is rotatably mounted on the solution connection cap 442, with its rotation axis coaxial with the inner tube 41. The rotor 451 has a hollow rotating cavity. Multiple rotating fan blades 452 are arranged in a ring-shaped interval along the axis of the rotor 451. The spray head 453 is fixedly connected to the rotor 451 and located within the rotating cavity. One end is connected to the inner tube 41, and the other end extends vertically upwards. When the rotating fan blades 452 and the rotor 451 rotate under the influence of steam, they drive the spray head 453 to rotate, thus spraying the solution from the spray head 453.

[0055] The rotator 451 is rotatably mounted on the solution connection cap 442. Multiple rotating fan blades 452 can be disposed in the air outlet chamber, driving the rotator 451 to rotate under the influence of steam. The spray head 453 can be understood as being fixed on the rotator 451, and when the rotating fan blades 452 and the rotator 451 rotate under the influence of steam, the spray head 453 rotates, causing the solution in the spray head 453 to spray.

[0056] In some embodiments, the above-mentioned spray head 453 may be adopted as follows: Figure 1 , Figure 2 The structure shown. See also Figure 1 , Figure 2The spray head 453 has a vertical part and multiple horizontal parts. The bottom end of the vertical part is fixed on the rotator 451 and communicates with the inner tube 41. Multiple horizontal parts are arranged in a ring at intervals at the top of the vertical part along the axis of the vertical part.

[0057] The vertical section and multiple horizontal sections are hollow structures, and together they form a spray chamber, which is connected to the solution inside the inner tube 41.

[0058] The vertical section can be connected to the inner tube 41, and multiple horizontal sections can be arranged at intervals in a ring at the top of the vertical section along the axis of the vertical section.

[0059] In some embodiments, the above-described circulation mechanism 20 may employ, for example... Figure 1 , Figure 2 The structure shown. See also Figure 1 , Figure 2 The circulation mechanism 20 includes a circulation pipe 21 and a circulation pump 22. One end of the circulation pipe 21 is connected to the top of the evaporation chamber 11, and the other end is connected to the bottom of the evaporation chamber 11. The circulation pump 22 is installed on the circulation pipe 21 and is used to transport the steam at the top of the evaporation chamber 11 to the bottom of the evaporation chamber 11.

[0060] The circulation pipe 21 can be understood as a gas pipe connecting the top and bottom of the evaporation chamber 11, and the steam discharge pipe is part of the circulation pipe 21. The main function of the circulation pump 22 is to circulate water. It is a pump used to control and circulate fluids, usually driven by an electric motor. The circulation pump 22 is existing technology and will not be described in detail here.

[0061] In some embodiments, the heating unit 14 described above may employ, for example... Figure 1 , Figure 2 The structure shown. See also Figure 1 , Figure 2 Heating unit 14 is a resistance heater.

[0062] A resistance heater is a device that uses the principle of resistance heating to generate heat. The core principle of a resistance heater is that when an electric current passes through a material with resistance, the material will heat up because the electrical energy is converted into heat energy. Resistance heaters are existing technology and will not be discussed in detail here.

[0063] In some embodiments, the cylinder 10 may be adopted as follows: Figure 1 The structure shown. See also Figure 1 The bottom of the cylinder 10 is provided with a support frame 15 for supporting the cylinder 10.

[0064] The support frame 15 can be used to support the cylinder 10.

[0065] In some embodiments, the outer sleeve 31 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 Multiple support rings are provided between the outer tube 31 and the inner tube 32. These multiple support rings are used to ensure that the outer tube 31 and the inner tube 32 are always spaced apart.

[0066] The support ring ensures that the outer tube 31 and the inner tube 32 are always spaced apart.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An evaporation and crystallization apparatus, characterized in that, include: The cylinder has an evaporation chamber, with a feed inlet at the top of the evaporation chamber and a discharge outlet at the bottom of the evaporation chamber; a heating unit for heating the solution in the evaporation chamber is provided on the side wall of the cylinder. A circulation mechanism is provided on the outside of the cylinder, with its top end connected to the top of the evaporation chamber and its bottom end provided with a steam discharge pipe; A temperature control mechanism is disposed in the evaporation chamber. The bottom end of the temperature control mechanism extends through the side wall of the cylinder. The temperature control mechanism has a first channel and a second channel. The end of the temperature control mechanism extending out of the cylinder is provided with a first connection port communicating with the first channel and a second connection port communicating with the second channel. The first connection port is connected to the steam discharge pipe. The second connection port is used to connect to the replenishment solution. A steam spraying mechanism is provided in multiple forms, and the multiple steam spraying mechanisms are fixed at the top of the overheating mechanism. Each steam spraying mechanism has a solution channel communicating with the second channel and a steam channel communicating with the first channel. The steam spraying mechanism is used to spray steam and the heated supplementary solution into the evaporation chamber. The over-temperature mechanism includes: An outer sleeve is connected to the steam exhaust pipe; the end of the outer sleeve extending out of the evaporation chamber is provided with the first connection port; An internal tube, disposed inside the outer tube and coaxially arranged with the outer tube, is used to communicate with the replenishment solution. The lumen of the internal tube is the second channel, and the channel between the internal tube and the outer tube is the first channel. The end of the internal tube extending out of the evaporation chamber is the second connection port. The portion of the combination of the outer tube and the inner tube located within the evaporation chamber is arranged in a spiral shape, with the spiral axis running vertically. Each of the steam spray mechanisms includes: An inner tube, vertically arranged, is connected to the top end of the built-in tube and is used to allow the solution to pass through; the cavity of the inner tube is the solution channel. An outer tube is fitted over the outer side of the inner tube, with one end connected to the outer sleeve for steam to pass through. The channel between the outer tube and the inner tube is the steam channel. Multiple annular support nets are provided, and the multiple annular support nets are spaced apart between the inner tube and the outer tube along the axial direction of the inner tube, so as to keep the inner tube and the outer tube always spaced apart; A connector is provided at the other end of the inner tube and the outer tube, for separating the solution in the inner tube from the vapor between the outer tube and the inner tube; The steam spray structure is rotatably mounted on the connector and is used to rotate under the influence of steam between the inner tube and the outer tube, so that the solution in the inner tube is evenly sprayed into the evaporation chamber.

2. The evaporation crystallization apparatus as described in claim 1, characterized in that, The connector includes: A steam connection cap, fixed to the other end of the outer pipe, has an open vent chamber; A solution connection cap is located inside the gas outlet chamber, fixedly connected to the steam connection cap, and fixed at the other end of the inner tube, communicating with the inner tube; The steam connection cap and the solution connection cap are provided with multiple connecting rods, which are used to fix the relative position of the solution connection cap inside the steam connection cap.

3. The evaporation crystallization apparatus as described in claim 2, characterized in that, The steam spray structure includes: A rotator is rotatably mounted on the solution connection cap, with its rotation axis coaxial with the inner tube, and the rotator has a hollow rotation cavity; The fan blades are provided in multiple ways, and the multiple fan blades are arranged at intervals in a ring along the axis of rotation. The spray head is fixedly connected to the rotator and located inside the rotating cavity. One end is connected to the inner tube, and the other end extends upward in a vertical direction. It is used to drive the spray head to rotate when the rotating fan blades and the rotator rotate under the drive of steam, so that the solution in the spray head can be sprayed.

4. The evaporation crystallization apparatus as described in claim 3, characterized in that, The spray head has a vertical part and multiple horizontal parts. The bottom end of the vertical part is fixed to the rotator and communicates with the inner tube. Multiple horizontal parts are arranged at intervals in a ring along the axis of the vertical part at the top of the vertical part. The vertical section and the plurality of horizontal sections are hollow structures, and together they form a spray chamber, which is connected to the solution inside the inner tube.

5. The evaporation crystallization apparatus as described in claim 1, characterized in that, The circulation mechanism includes: The circulation tube has one end connected to the top of the evaporation chamber and the other end connected to the bottom of the evaporation chamber; A circulation pump, installed on the circulation pipe, is used to transport the steam at the top of the evaporation chamber to the bottom of the evaporation chamber.

6. The evaporation crystallization apparatus as described in claim 1, characterized in that, The heating unit is a resistance heater.

7. The evaporation crystallization apparatus as described in claim 1, characterized in that, The bottom of the cylinder is provided with a support frame for supporting the cylinder.

8. The evaporation crystallization apparatus as described in claim 2, characterized in that, Multiple support mesh rings are provided between the outer tube and the inner tube, and the multiple support mesh rings are used to keep the outer tube and the inner tube always spaced apart.

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