Step-by-step heating sweating device

Abstract

The utility model relates to the technical field of chemical product preparation, in particular to a step-by-step heating sweating device which comprises a heating container, a heating assembly and a plurality of sweating vessels, the heating assembly is arranged in the heating container, and the heating assembly is used for heating the interior of the heating container step by step; the multiple sweating vessels are all arranged in the heating container, and the multiple sweating vessels are evenly arranged in the height direction of the heating container; the device further comprises a circulation assembly, the circulation assembly is used for driving air in the heating container to circulate from bottom to top, and a plurality of through holes are formed in the bottom wall of the sweating vessel. The heating container has the effects that the temperature near each sweating vessel in the heating container is more uniform, and the sweating effect of crystals is improved.

Description

Technical Field

[0001] The present application relates to the field of chemical product preparation, and in particular to a step-by-step temperature-raising sweating device. Background Art

[0002] Melt crystallization technology is a new type of separation and purification technology, which is widely used in fine chemicals, pharmaceuticals and other related industries. When preparing crystals, the raw materials are first injected into the crystallizer to crystallize the raw materials by gradually cooling them down. During the growth of the crystals, impurities in the mother liquor are usually hidden in the coarse crystals; therefore, the coarse crystals extracted from the crystallizer are taken out and purified through the sweating process. The mechanism of sweating is to maintain the crystal at a temperature slightly higher than its melting point, so that the low-melting-point impurities inside the crystal are continuously melted and flow out, thereby purifying the crystal.

[0003] Existing crystal sweating equipment includes a heating box and a plurality of sweating dishes for holding crystals to be processed. The plurality of sweating dishes are vertically stacked in the heating box. A heating source is provided at the bottom of the heating box. When working, the heating source heats the air in the heating box so that the impurities in the crystal melt and flow out. However, although this type of heating equipment can improve the efficiency of crystal purification, it is easy to make the fluidity of the gas in the heating box worse, thereby causing a temperature difference between the upper and lower parts of the heating box, and it is difficult to make the temperature of the sweating dishes at various positions uniform, which affects the sweating effect of the crystal. Utility Model Content

[0004] In order to make the temperature near each sweating dish inside the heating container more uniform and improve the sweating effect of the crystal, the present application provides a step-by-step heating sweating device.

[0005] The present application provides a step-by-step heating and sweating device that adopts the following technical solution:

[0006] A step-by-step temperature increase sweating device comprises a heating container, a heating component and a plurality of sweating dishes, wherein the heating component is arranged inside the heating container, and the heating component is used to gradually increase the temperature inside the heating container; the plurality of sweating dishes are all arranged in the heating container, and the plurality of sweating dishes are evenly arranged along the height direction of the heating container; and further comprises a circulation component, wherein the circulation component is used to drive the air inside the heating container to circulate from bottom to top, and the bottom wall of the sweating dishes is provided with a plurality of through holes.

[0007] By adopting the above technical scheme, the heating component can gradually increase the temperature inside the heating container, thereby heating the crystal and melting the impurities inside the crystal; the through holes on the sweating dish can facilitate the circulation of air inside the heating container, and the circulation component can drive the air inside the heating container to circulate from bottom to top, so that the gas temperature at various positions of the heating container remains uniform, reducing the possibility of uneven heating of the crystals at various positions, and improving the precipitation efficiency and effect of crystal impurities.

[0008] Optionally, an inner tube is coaxially arranged inside the heating container, and the inner tube is coaxially arranged with the heating container, and a plurality of sweating dishes are arranged on the inner wall of the inner tube; a gas channel is formed between the outer wall of the inner tube and the inner wall of the heating container; the end wall at one end of the inner tube in the length direction is fixedly connected to the inner bottom wall of the heating container, and there is a gap between the other end and the inner top wall of the heating container; the gas channel is connected to the interior of the inner tube, and the circulation component is used to drive the air inside the inner tube to circulate from bottom to top and exchange with the gas in the gas channel.

[0009] By adopting the above technical solution, the circulation component can push the gas at the bottom of the inner tube to move toward the direction close to the top wall of the heating container and flow to the top of the inner tube; the top wall of the heating container blocks the gas, allowing the gas to enter the gas channel due to the pressure difference; the circulation component then transfers the gas to the inside of the inner tube, realizing the circulation of the airflow in the heating container, thereby maintaining a uniform gas temperature at various positions of the heating container.

[0010] Optionally, the circulation component includes a plurality of circulation fans, and the plurality of circulation fans are arranged around the bottom of the side wall in the height direction of the inner tube; the air inlet of the circulation fan is connected to the gas channel, and the air outlet of the circulation fan is connected to the interior of the inner tube.

[0011] By adopting the above technical scheme, the air in the gas channel can enter the circulating fan from the air inlet of the circulating fan, and then be discharged to the inside of the inner tube from the air outlet of the circulating fan. The gas discharged from the circulating fan can push the gas at the bottom of the inner tube to move toward the direction close to the top wall of the heating container and flow to the top of the inner tube; the pressure difference of the gas flowing to the top wall of the heating container flows back into the gas channel and then is transferred by the circulating fan to the inside of the inner tube, thereby realizing the circulation of the airflow in the heating container and keeping the gas temperature at each position of the heating container uniform.

[0012] Optionally, the heating component includes a heating resistance wire, the heating resistance wire is evenly arranged on the sweating dish, and the heating resistance wire is connected to a power supply; the sweating dish is made of a material with good thermal conductivity.

[0013] By adopting the above technical scheme, the temperature of the heating resistance wire rises after being energized, which can heat the crystals on the sweating dish and the air around the sweating dish; when the temperature near the sweating dish is not enough, the heating resistance wire on the sweating dish can heat the crystals on the sweating dish separately, thereby reducing the possibility that the sweating efficiency of the crystals will be affected due to uneven heating of the crystals at different positions of the heating container.

[0014] Optionally, the heating component further comprises a temperature sensor, wherein the temperature sensor is embedded in the upper surface of the sweat dish, the temperature sensor is communicatively connected to a controller, and the controller is communicatively connected to a power source for controlling the heating resistance wire.

[0015] By adopting the above technical scheme, the temperature sensor can detect the temperature near the sweating dish and control the on and off of the power supply according to the actual temperature conditions to control the working state of the heating resistance wire; when the temperature near the sweating dish is low, the controller controls the power supply heating resistance wire to heat it, so that the temperature near the sweating dish increases; when the temperature near the sweating dish is too high, the power supply is turned off to achieve energy saving effect.

[0016] Optionally, the upper surface of the sweat dish is covered with a polytetrafluoroethylene coating.

[0017] By adopting the above technical solution, the polytetrafluoroethylene coating can reduce the friction between the crystal and the sweating plate, thereby reducing the possibility of the crystal adhering to the sweating plate, and further reducing the possibility of some crystals remaining on the sweating plate when the staff recovers the crystals.

[0018] Optionally, a liquid outlet pipe is provided through the bottom wall of the heating container, one end of the liquid outlet pipe is connected to the interior of the heating container, and the other end is provided with a control valve, and the control valve is used to control the opening and closing of the liquid outlet pipe.

[0019] By adopting the above technical solution, the impurity solution generated after the crystal sweats can flow to the bottom of the heating container through the through hole; after the sweating is completed, the control valve is opened, and the impurity solution can flow out of the heating container from the liquid outlet pipe, thereby facilitating the staff to clean and recover the impurities.

[0020] Optionally, the liquid outlet pipe is arranged at the center of the bottom wall of the heating container, the bottom wall of the heating container is arranged at an angle, and the bottom wall of the heating container is inclined downward toward the direction close to the liquid outlet pipe.

[0021] By adopting the above technical solution, since the bottom wall of the heating container is inclined, the impurity solution falling on the bottom wall of the heating container has a tendency to flow toward the liquid outlet pipe, thereby improving the cleaning efficiency of the impurity solution.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The heating component heats the interior of the heating container and controls the temperature inside the heating container to rise step by step, so that the impurities inside the crystal are melted, and the molten impurity solution flows to the bottom of the heating container through the through hole; in addition, the through hole on the sweating dish can facilitate the circulation of air inside the heating container, and the circulation component can drive the air inside the heating container to circulate from bottom to top, so that the gas temperature at each position of the heating container remains uniform, reducing the possibility of uneven heating of the crystals at each position, and improving the precipitation efficiency and effect of crystal impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the step-by-step temperature rise sweating device in this embodiment;

[0025] Figure 2 yes Figure 1 Sectional view along line AA;

[0026] Figure 3 yes Figure 2 A magnified schematic diagram of part B;

[0027] Figure 4 It is a partial cross-sectional view of the sweating dish of the present application;

[0028] Figure 5 It is the control principle diagram of the heating component of this application.

[0029] Figure numerals: 1. Heating container; 11. Liquid outlet pipe; 12. Control valve; 13. Inner tube; 131. Ring groove; 2. Sweating dish; 21. Through hole; 22. Convex ring; 3. Heating component; 31. Heating resistance wire; 32. Temperature sensor; 33. Controller; 41. Circulating fan; 5. Gas channel. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The embodiment of the present application discloses a step-by-step temperature increase sweating device.

[0032] Reference Figure 1 and Figure 2A step-by-step temperature rise sweating device comprises a heating container 1 and a plurality of sweating dishes 2 for holding crystals, wherein the plurality of sweating dishes 2 are evenly distributed along the height direction of the heating container 1, and a plurality of through holes 21 are opened on the bottom wall of the sweating dishes 2 to facilitate the circulation of airflow inside the heating container 1. In addition, when there are many molten impurities, the impurity solution can flow to the bottom of the heating container 1 through the through holes 21, so as to facilitate the subsequent centralized collection of the impurity solution by the staff; it also comprises a heating component 3 and a circulation component, wherein the heating component 3 is arranged inside the heating container 1, and the heating component 3 can gradually increase the temperature inside the heating container 1, thereby heating the crystals and melting the impurities inside the crystals; the circulation component is used to drive the air inside the heating container 1 to circulate from bottom to top, thereby keeping the gas temperature at each position of the heating container 1 uniform, reducing the possibility of uneven heating of the crystals at each position, and improving the precipitation efficiency and precipitation effect of the crystal impurities.

[0033] In this embodiment, the heating container 1 is a container with an opening at the upper end. The opening of the heating container 1 is covered with a cover body, and the cover body is detachably connected to the side wall of the opening of the heating container 1 to facilitate the staff to take and place the sweating dish 2 and the crystal.

[0034] The upper surface of the sweating dish 2 is covered with a polytetrafluoroethylene coating, which can reduce the friction between the crystals and the sweating dish 2, thereby reducing the possibility of the crystals adhering to the sweating dish 2, and further reducing the possibility of some crystals remaining on the sweating dish 2 when the staff recovers the crystals.

[0035] Reference Figure 1 and Figure 2 A liquid outlet pipe 11 is penetrated through the bottom wall of the heating container 1, one end of the liquid outlet pipe 11 is connected to the interior of the heating container 1, and the other end is provided with a control valve 12, and the control valve 12 is used to control the opening and closing of the liquid outlet pipe 11; after the crystals finish sweating, part of the impurity solution can flow to the bottom of the heating container 1 through the through hole 21, and after the control valve 12 is opened, the impurity solution can flow out of the heating container 1 from the liquid outlet pipe 11, thereby facilitating the staff to clean and recover the impurities.

[0036] In this embodiment, the liquid outlet pipe 11 is arranged at the center of the bottom wall of the heating container 1. The bottom wall of the heating container 1 is inclined, and the bottom wall of the heating container 1 is inclined downward toward the liquid outlet pipe. Since the bottom wall of the heating container 1 is inclined, the impurity solution falling on the bottom wall of the heating container 1 tends to flow toward the liquid outlet pipe 11, thereby improving the cleaning efficiency of the impurity solution.

[0037] Reference Figure 2 and Figure 3An inner tube 13 is coaxially arranged inside the heating container 1, and the inner tube 13 is coaxially arranged with the heating container 1. The inner wall of the heating container 1 and the outer wall of the inner tube 13 are fixedly connected by a plurality of connecting rods; one end of the connecting rod is fixedly connected to the outer wall of the inner tube 13, and the other end is fixedly connected to the inner wall of the heating container 1, and a plurality of sweating dishes 2 are arranged on the inner wall of the inner tube 13 from top to bottom in sequence; in this embodiment, the sweating dish 2 and the inner wall of the inner tube 13 are detachably connected, and a convex ring 22 of elastic material is arranged around the outer wall of the sweating dish 2, and an annular groove 131 adapted to the convex ring 22 is opened on the inner wall of the inner tube 13. When the staff assembles the sweating dish 2 and the inner tube 13, the convex ring 22 is adaptively elastically deformed by the action of external force and buckled into the groove, and the outer wall of the convex ring 22 is clamped with the inner wall of the groove, thereby realizing the limited fixation of the sweating dish 2 and the heating container 1.

[0038] Reference Figure 2 and Figure 3 The end wall of one end of the inner tube 13 in the length direction is fixedly connected to the inner bottom wall of the heating container 1, and there is a gap between the other end and the inner top wall of the heating container 1. A gas channel 5 is formed between the outer wall of the inner tube 13 and the inner wall of the heating container 1, and the gas channel 5 is connected to the interior of the inner tube 13.

[0039] Reference Figure 2 The circulation component includes a plurality of circulation fans 41, which are arranged around the bottom of the side wall of the inner tube 13 in the height direction; the air inlet of the circulation fan 41 is connected to the gas channel 5, and the air outlet of the circulation fan 41 is connected to the inside of the inner tube 13.

[0040] Reference Figure 2 , the circulation fan 41 can transfer the air in the gas channel 5 to the inside of the inner tube 13, and the gas discharged from the circulation fan 41 can push the gas at the bottom of the inner tube 13 to move toward the direction close to the top wall of the heating container 1, and flow to the top of the inner tube 13; the top wall of the heating container 1 blocks the gas; the top of the heating container 1 flows into the gas channel 5 due to the pressure difference and is then transferred to the inside of the inner tube 13 by the circulation fan 41, so that the circulation of the airflow in the heating container 1 is realized, so that the gas temperature at each position of the heating container 1 is kept uniform ( Figure 2 The black arrows in the figure indicate the direction of air flow).

[0041] Reference Figure 4 and Figure 5The heating component 3 includes a heating resistance wire 31, which is evenly arranged on the sweating dish 2. The heating resistance wire 31 is connected to a power source. When the power source is powered on, the heating resistance wire 31 can heat the sweating dish 2. The heating resistance wire 31 heats the sweating dish 2 through heat transfer, and heats the crystals on the sweating dish 2 and the air around the sweating dish 2. In this embodiment, the bottom wall of the sweating dish 2 is made of a material with good thermal conductivity (such as alumina ceramic) to facilitate the heat transfer of the sweating dish 2. When the temperature near the sweating dish 2 is not high enough, the heating resistance wire 31 is powered on to heat the crystals on the sweating dish 2 with insufficient temperature in a targeted manner, thereby reducing the possibility that the sweating efficiency of the crystals will be affected due to uneven heating of the crystals at different positions of the heating container 1.

[0042] In some examples of this embodiment, a first connecting pin connected to an external power supply can be provided on the side wall of the inner tube 13, and second connecting pins can be provided at both ends of the extension direction of the heating resistance wire 31. The two second connecting pins are provided on the side wall of the sweating dish 2 in the thickness direction. When the sweating dish 2 and the inner tube 13 are assembled, it is only necessary to align the first connecting pin with the second connecting pin and make the two pairs of first connecting pins fit together to realize the power supply of the heating resistance wire 31. Any other method can also be used to power the electric heating resistance wire, and this is not limited to the present embodiment.

[0043] Reference Figure 4 and Figure 5 The heating component 3 also includes a temperature sensor 32, which is embedded in the upper surface of the sweating dish 2. The temperature sensor 32 is communicatively connected to the controller 33. The signal output end of the temperature sensor 32 is communicatively connected to the signal input end of the controller 33. The signal output end of the controller 33 is communicatively connected to the signal input end of the power supply for controlling the heating resistance wire 31; the controller 33 can control the opening and closing of the power supply of the heating resistance wire 31.

[0044] Reference Figure 4 and Figure 5 The temperature sensor 32 can detect the temperature near the sweating dish 2. When the temperature sensor 32 detects that the temperature near the sweating dish 2 is lower than a preset threshold, it sends an on command to the controller 33. After receiving the on command, the controller 33 controls the power supply to heat the heating resistance wire 31, so that the temperature near the sweating dish 2 increases; when the temperature sensor 32 detects that the temperature near the sweating dish 2 is higher than the preset threshold, it sends a off command to the controller 33. After receiving the off command, the controller 33 controls the power supply to cut off and stop heating the heating resistance wire 31, thereby achieving energy saving effect.

[0045] The implementation principle of the step-by-step temperature increase sweating device of the embodiment of the present application is as follows: after the heating resistance wire 31 is heated, the temperature of the sweating dish 2 is increased through heat transfer, and the crystals on the sweating dish 2 and the air around the sweating dish 2 are heated, so that the impurities in the crystals are melted, and the molten impurity solution flows to the bottom of the heating container 1 through the through hole 21; the temperature sensor 32 can detect the temperature near the sweating dish 2, and when the temperature sensor 32 detects that the temperature near the sweating dish 2 is lower than a preset threshold, it sends an opening instruction to the controller 33. After receiving the opening instruction, the controller 33 controls the power supply to heat the heating resistance wire 31, so that the temperature near the sweating dish 2 is increased, so that the temperature around the sweating dish 2 is appropriate;

[0046] The circulating fan 41 can transfer the air in the gas channel 5 to the inside of the inner tube 13. The gas discharged from the circulating fan 41 can push the gas at the bottom of the inner tube 13 to move toward the top wall of the heating container 1 and flow to the top of the inner tube 13. The top wall of the heating container 1 blocks the gas. The top of the heating container 1 flows into the gas channel 5 due to the pressure difference and is then transferred to the inside of the inner tube 13 by the circulating fan 41, thereby realizing the circulation of the airflow in the heating container 1, so that the gas temperature at each position of the heating container 1 remains uniform.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A step-by-step temperature rise sweating device, characterized in that: The invention comprises a heating container (1), a heating component (3) and a plurality of sweating dishes (2), wherein the heating component (3) is arranged inside the heating container (1) and is used to gradually increase the temperature inside the heating container (1); the plurality of sweating dishes (2) are all arranged inside the heating container (1), and the plurality of sweating dishes (2) are evenly arranged along the height direction of the heating container (1); and the invention also comprises a circulation component, wherein the circulation component is used to drive the air inside the heating container (1) to circulate from bottom to top, and the bottom wall of the sweating dishes (2) is provided with a plurality of through holes (21).

2. A step-by-step temperature rise sweating device according to claim 1, characterized in that: An inner tube (13) is coaxially arranged inside the heating container (1), and the inner tube (13) and the heating container (1) are coaxially arranged, and a plurality of the sweating dishes (2) are arranged on the inner wall of the inner tube (13); a gas channel (5) is formed between the outer wall of the inner tube (13) and the inner wall of the heating container (1); the end wall of one end of the inner tube (13) in the longitudinal direction is fixedly connected to the inner bottom wall of the heating container (1), and a gap exists between the other end and the inner top wall of the heating container (1); the gas channel (5) is connected to the inside of the inner tube (13), and the circulation component is used to drive the air inside the inner tube (13) to circulate from bottom to top and to exchange with the gas in the gas channel (5).

3. A step-by-step temperature rise sweating device according to claim 2, characterized in that: The circulation component comprises a plurality of circulation fans (41), which are arranged around the bottom of the side wall of the inner tube (13) in the height direction; the air inlet of the circulation fan (41) is connected to the gas channel (5), and the air outlet of the circulation fan (41) is connected to the inside of the inner tube (13).

4. The step-by-step temperature rise sweating device according to claim 1, characterized in that: The heating assembly (3) comprises a heating resistance wire (31), the heating resistance wire (31) is evenly arranged on the sweating dish (2), and the heating resistance wire (31) is connected to a power source; the sweating dish (2) is made of a material with good thermal conductivity.

5. The step-by-step temperature rise sweating device according to claim 4, characterized in that: The heating assembly (3) further comprises a temperature sensor (32), wherein the temperature sensor (32) is embedded in the upper surface of the sweating dish (2), the temperature sensor (32) is communicatively connected to a controller (33), and the controller (33) is communicatively connected to a power source for controlling the heating resistance wire (31).

6. The step-by-step temperature rise sweating device according to claim 1, characterized in that: The upper surface of the sweating dish (2) is covered with a polytetrafluoroethylene coating.

7. The step-by-step temperature rise sweating device according to claim 1, characterized in that: A liquid outlet pipe (11) is provided through the bottom wall of the heating container (1), one end of the liquid outlet pipe (11) is connected to the interior of the heating container (1), and the other end is provided with a control valve (12), and the control valve (12) is used to control the opening and closing of the liquid outlet pipe (11).

8. The step-by-step temperature rise sweating device according to claim 7, characterized in that: The liquid outlet pipe (11) is arranged at the center of the bottom wall of the heating container (1); the bottom wall of the heating container (1) is arranged in an inclined manner, and the bottom wall of the heating container (1) is inclined downward in a direction close to the liquid outlet pipe.

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