A melt crystallization apparatus

Abstract

The application discloses a kind of melt crystallization devices, comprising: kettle top is provided with a cover, cover central installation has a pipe body, kettle outer wall is provided with jacket, jacket is communicated with first water inlet pipe and first water outlet pipe, first water inlet pipe is communicated with cold water tank, first water inlet pipe side wall is communicated with branch pipe, branch pipe is communicated with hot water tank, pipe cover top is communicated with second water inlet pipe and second water outlet pipe, second water inlet pipe is communicated with hot water tank, kettle bottom is wound with heating wire, kettle inside additional central pipe body and outside jacket form double heat exchange passage body, in the process of original liquid crystallization, cold water is passed into jacket while ice block is placed in pipe body, increase heat exchange area, improve cooling rate, so that original liquid quickly reaches supersaturated state, promote crystal high-efficiency precipitation, in crystal melting stage, hot water is passed into jacket and pipe body, while starting heating wire auxiliary heating, double heating mode accelerates the heating rate, so that crystal quickly melts, improve efficiency, shorten production cycle.

Description

Technical Field

[0001] This application relates to the field of chemical separation and purification equipment technology, and in particular to a melting crystallization device. Background Technology

[0002] Melt crystallization is a purification method that separates components in a mixture based on differences in their freezing points. Compared with traditional distillation, melt crystallization has significant advantages in separating systems with similar boiling points, isomers, and heat-sensitive substances. However, existing melt crystallization equipment typically uses a single heat exchange method to cool and crystallize the molten liquid. This method has a limited heat exchange area and a slow cooling rate, resulting in low crystallization efficiency. Furthermore, after crystallization, the melting process of the crystals often uses a single heating method, which also results in a slow heating rate, affecting overall production efficiency. Utility Model Content

[0003] This application provides a melting and crystallization device. The device adds a central tube inside the vessel body, which, together with the external jacket, forms a dual heat exchange channel. During the cooling and crystallization process of the raw liquid, ice blocks are placed inside the tube while cold water is introduced into the jacket, increasing the heat exchange area and improving the cooling rate. This allows the raw liquid to quickly reach a supersaturated state, promoting efficient crystal precipitation. The device has a jacket at the spherical bottom of the vessel body, and heating wires are installed inside the jacket. During the crystal melting stage, hot water can be introduced into the jacket while the heating wires in the jacket at the bottom of the vessel body are activated for auxiliary heating. This dual heating mode accelerates the heating rate, enabling the crystals to melt rapidly, improving efficiency and shortening the production cycle.

[0004] This application provides a melting crystallization apparatus, comprising: a vessel body, a cover at the top of the vessel body, a feed inlet at the top of the cover, a pipe body installed in the center of the cover, the pipe body extending into the vessel body, a pipe cap screwed onto the top of the pipe body, a temperature sensor installed on the inner wall of the vessel body, a jacket installed on the outer wall of the vessel body, the jacket being connected to a first water inlet pipe and a first water outlet pipe, the first water inlet pipe being connected to a cold water tank, the first water outlet pipe being connected to a water collection tank, a solenoid valve installed on the first water inlet pipe, a branch pipe connected to the side wall of the first water inlet pipe, the branch pipe being connected to a hot water tank, a solenoid valve installed on the branch pipe, a second water inlet pipe and a second water outlet pipe connected to the top of the pipe cap, one end of the second water inlet pipe being connected to the hot water tank, and the second water outlet pipe being connected to the water collection tank;

[0005] The bottom of the tube is suspended above the bottom of the vessel. The bottom of the vessel is spherical. A temperature sensor is installed at the bottom of the vessel. A heating wire is wound around the bottom of the vessel. The bottom of the vessel is connected to a first discharge pipe, a second discharge pipe, and a third discharge pipe. A solenoid valve is installed on each discharge pipe. The end of the first discharge pipe is connected to a residual liquid tank. The end of the second discharge pipe is connected to a raw liquid tank. The end of the third discharge pipe is connected to a finished product tank.

[0006] Two support rods are welded to the outer wall of the vessel, and the bottom of the two support rods is welded to a base plate. Each water tank is placed on the base plate. A PLC controller is connected to the outside of the vessel, and each temperature sensor is electrically connected to the PLC controller.

[0007] Furthermore, a first water pump is installed in the cold water tank, and a second and a third water pump are installed in the hot water tank. The first water pump is connected to a first inlet pipe, the second water pump is connected to a second inlet pipe, and the third water pump is connected to a branch pipe. Each water pump is electrically connected to a PLC controller.

[0008] Furthermore, a jacket is provided at the bottom of the vessel, and the heating wire is located inside the jacket.

[0009] Furthermore, the jacket on the outer wall of the vessel and the jacket at the bottom of the vessel are set independently.

[0010] Furthermore, each of the first, second, and third discharge pipes is equipped with a solenoid valve, and the two solenoid valves are electrically connected to the PLC controller.

[0011] Furthermore, the PLC controller is equipped with a display screen and several operation buttons.

[0012] As can be seen from the above technical solution, this application provides a melting crystallization device, including: a vessel body, a cover on the top of the vessel body, a feed inlet on the top of the cover, and a top cover on the feed inlet. The top cover is opened, and the raw liquid to be crystallized is injected into the vessel body through the feed inlet. Then the top cover is closed. A tube is installed in the center of the cover, extending into the vessel body. A cap is screwed onto the top of the tube. When the raw liquid is subjected to heat exchange and cooling crystallization, the cap is opened, and ice is placed into the tube. The ice lowers the temperature inside the tube, causing the raw liquid in the vessel body to crystallize and precipitate on the outer wall of the tube. A temperature sensor is installed on the inner wall of the vessel body. The temperature sensor monitors the temperature inside the vessel body and transmits the temperature data to a PLC controller to monitor the temperature inside the vessel body in real time. The vessel body has a jacket on its outer wall. A first inlet pipe and a first outlet pipe are connected to the side wall of the jacket. The first inlet pipe is connected to a cold water tank, and the first outlet pipe is connected to a collection tank. A solenoid valve is installed on the first inlet pipe. During the ice crystallization process, the PLC controller controls the first water pump and the solenoid valve to open. Through the action of the first water pump, cold water from the cold water tank is transported from the first inlet pipe to the jacket of the vessel body. The cold water in the jacket exchanges heat with and cools the original liquid in the vessel body, causing it to crystallize. The cold water in the jacket absorbs heat, and when the water level reaches a certain height, it is discharged into the collection tank through the second outlet pipe. This continuous flow of cold water in the jacket exchanges heat with and cools the original liquid in the vessel body, preventing the temperature from rising and causing crystallization. The efficiency decreases. The dual heat exchange and cooling channel of the tube body and jacket increases the heat exchange area and improves the cooling rate, allowing the raw liquid to quickly reach a supersaturated state and promoting efficient crystal precipitation. A branch pipe is connected to the side wall of the first inlet pipe, which is connected to a hot water tank. A second solenoid valve is installed on the branch pipe. The top of the tube cover is connected to the second inlet pipe and the second outlet pipe. One end of the second inlet pipe is connected to the hot water tank, and the second outlet pipe is connected to the water collection tank. After the raw liquid in the reactor has completed crystallization, the PLC controller controls the opening of the third solenoid valve on the first outlet pipe to discharge the non-crystallized residual liquid into the residual liquid tank. After discharge, the third solenoid valve is closed. Subsequently, the PLC controller controls the second and third water pumps and the second solenoid valve to open, while simultaneously closing the first water pump and the first solenoid valve. Water from the hot water tank is pumped into the pipe body through the second inlet pipe to heat the pipe body. At the same time, water from the hot water tank is output from the branch pipe to the first inlet pipe and then enters the jacket to slowly heat the crystals in the reactor body, causing the crystals to sweat. Some impurities trapped inside the crystals melt through sweating to obtain mother liquor. The PLC controller controls the opening of the solenoid valve three on the second discharge pipe to discharge the mother liquor into the raw liquid tank for later recycling. After discharge, the solenoid valve three is closed to continue heating, continuously injecting hot water into the jacket and pipe body, and turning on the heating wire to assist in heating. When the water in the pipe body is full, it is discharged into the water collection tank through the second drain pipe, continuously heating and melting the pipe body and jacket to crystallize.The bottom of the tube is suspended above the bottom of the vessel, which has a spherical bottom for easy liquid discharge. A second temperature sensor is installed at the bottom of the vessel to monitor the heating temperature of the heating wire and feeds the data back to the PLC controller. When the temperature exceeds a set value, the PLC controller shuts off the heating wire to prevent excessive heat from affecting the quality of the molten liquid. When the temperature is too low, the PLC controller turns on the heating wire. Heating wire is wound around the bottom of the vessel. During crystal melting, when hot water is injected into the jacket and tube, the PLC controller simultaneously turns on the heating wire to provide auxiliary heating to the bottom of the vessel. This dual heating mode accelerates the heating rate, allowing the crystal to melt quickly, improving efficiency and shortening the production cycle. The bottom of the vessel is connected to a first, second, and third discharge pipe, each equipped with a... Equipped with three solenoid valves, the first discharge pipe is connected to a residual liquid tank, the second discharge pipe to a raw liquid tank, and the third discharge pipe to a finished product tank. When the crystals completely melt into liquid after heating, the PLC controller controls the opening of the third discharge pipe's solenoid valve, collecting the target product into the finished product tank. Two support rods are welded to the outer wall of the reactor body, with their bottoms welded to a base plate. These support rods support the reactor body. Each water tank is placed on the base plate. A PLC controller is connected to the outside of the reactor body; the preferred PLC controller is the standard model JS-68T-D from Junchuang Automation Technology Co., Ltd. Each temperature sensor is electrically connected to the PLC controller. The two temperature sensors monitor the temperature inside the reactor body and the temperature at the bottom of the reactor body, respectively, controlling the temperature to crystallize, sweat, and melt the raw liquid, thus obtaining the target product.

[0013] Working principle:

[0014] Crystallization process: The raw liquid is added into the reactor through the feed inlet. The PLC controller starts the first water pump and opens solenoid valve one, introducing cold water into the jacket and simultaneously filling the central tube with ice. The dual cooling system quickly removes heat, cooling the material and causing it to crystallize. After crystallization, the uncrystallized liquid is discharged into the residual liquid tank. Sweating process: The temperature is slowly increased (below the temperature of the crystal melting process). Hot water is introduced into the jacket and tube, and some impurities trapped inside the crystals melt and flow out through sweating, further purifying the crystals. Melting process: After the mother liquor obtained from sweating is discharged, the PLC controller closes solenoid valve one and opens solenoid valve two, starting the second and third water pumps to introduce hot water into the jacket and tube. At the same time, the electric heating wire in the bottom jacket of the reactor is activated for auxiliary heating. The dual heating causes the crystals to melt rapidly, improving efficiency and shortening the production cycle.

[0015] In summary, the beneficial effects of this application are as follows:

[0016] 1. The device adds a central tube inside the vessel body, which together with the external jacket forms a double heat exchange channel. During the cooling and crystallization process of the raw liquid, ice is placed inside the tube while cold water is introduced into the jacket. This increases the heat exchange area, improves the cooling rate, and allows the raw liquid to quickly reach a supersaturated state, promoting efficient crystal precipitation.

[0017] 2. The device has a jacket at the spherical bottom of the vessel, and an electric heating wire is installed in the jacket. During the crystal melting stage, hot water can be introduced into the jacket, and the electric heating wire in the jacket at the bottom of the vessel can be activated for auxiliary heating. The dual heating mode accelerates the heating rate, enables the crystal to melt quickly, improves efficiency, and shortens the production cycle. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this application.

[0020] Figure 2 This is a schematic diagram of the liquid collection tank structure of this application.

[0021] Figure 3 Please provide a schematic diagram of the vessel's structure.

[0022] Figure 4 This is a schematic diagram of the PLC control structure of this application.

[0023] Illustration:

[0024] Among them, 1-pot body, 2-lid body, 3-pipe body, 4-pipe cover, 5-base plate, 6-temperature sensor 1, 7-first water inlet pipe, 8-first water outlet pipe, 9-cold water tank, 10-water collection tank, 11-second water inlet pipe, 12-second water outlet pipe, 13-branch pipe, 14-hot water tank, 15-residual liquid tank, 16-raw liquid tank, 17-finished product tank, 18-heating wire, 19-PLC controller. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0026] As can be seen from the above technical solutions, see [link / reference]. Figures 1-4 .

[0027] Example 1:

[0028] A melting crystallization apparatus includes: a vessel body 1, a cover 2 at the top of the vessel body 1, a feed inlet at the top of the cover 2, and a top cover at the feed inlet. The top cover is opened, and the raw liquid to be crystallized is injected into the vessel body 1 through the feed inlet. The top cover is then closed. A tube 3 is installed in the center of the cover 2, extending into the vessel body 1. A cap 4 is screwed onto the top of the tube 3. When the raw liquid is subjected to heat exchange and cooling crystallization, the cap 4 is opened, and ice is placed into the tube 3. The ice lowers the temperature inside the tube 3, causing the raw liquid in the vessel body 1 to crystallize and precipitate on the outer wall of the tube 3. A temperature sensor 6 is installed on the inner wall of the vessel body 1. The temperature sensor 6 monitors the temperature inside the vessel body 1 and transmits the temperature data to a PLC controller 19 to monitor the temperature inside the vessel body 1 in real time. A jacket is installed on the outer wall of the vessel 1. The side wall of the jacket is connected to a first inlet pipe 7 and a first outlet pipe 8. The first inlet pipe 7 is connected to a cold water tank 9, and the first outlet pipe 8 is connected to a collection tank 10. A solenoid valve 1 is installed on the first inlet pipe 7. During the process of ice crystallization when ice is added to the vessel 3, the PLC controller 19 controls the first water pump and the first solenoid valve 1 to open (the second solenoid valve 2 is closed). Through the action of the first water pump, the cold water in the cold water tank 9 is transported to the jacket of the vessel 1 through the first inlet pipe 7. The cold water in the jacket exchanges heat with the original liquid in the vessel 1 to cool it down, causing it to crystallize. The cold water in the jacket absorbs heat, and when the water volume reaches a certain height, it is discharged into the collection tank 10 through the second outlet pipe 12. This allows the cold water flowing in the jacket to continuously cool the original liquid in the vessel 1. Heat exchange and cooling are used to avoid temperature rise and decreased crystallization efficiency. The tube body 3 and the jacket have a double heat exchange and cooling channel, which increases the heat exchange area and improves the cooling rate, allowing the raw liquid to quickly reach a supersaturated state and promoting crystal precipitation. The side wall of the first water inlet pipe 7 is connected to a branch pipe 13, which is connected to a hot water tank 14. A solenoid valve 2 is installed on the branch pipe 13. The top of the pipe cover 4 is connected to the second water inlet pipe 11 and the second water outlet pipe 12. One end of the second water inlet pipe 11 is connected to the hot water tank 14, and the second water outlet pipe 12 is connected to the water collection tank 10. When the raw liquid in the vessel body 1 has completed crystallization, the PLC controller 19 controls the solenoid valve 3 on the first discharge pipe to open, discharging the non-crystallized residual liquid into the residual liquid tank 15. After discharge, the solenoid valve 3 is closed, and then the PLC controller 1... 9 controls the opening of the second and third water pumps and solenoid valve 2, while simultaneously closing the first water pump and solenoid valve 1. Through the pumps, water from the hot water tank 14 flows into the pipe body 3 via the second inlet pipe 11, heating the pipe body 3. Simultaneously, water from the hot water tank 14 is output from the branch pipe 13 to the first inlet pipe 7 and then enters the jacket, slowly heating the crystals in the vessel body 1, causing them to sweat. Some impurities trapped inside the crystals melt during sweating, yielding mother liquor. PLC controller 19 controls the opening of solenoid valve 3 on the second outlet pipe, discharging the mother liquor from the second outlet pipe into the raw material tank 16 for later recycling. After discharge, solenoid valve 3 is closed to continue heating, continuously injecting hot water into the jacket and pipe body 3, and activating heating wire 18 for auxiliary heating.When the water in pipe 3 is full, it is discharged into the water collection tank 10 through the second drain pipe, continuously heating and melting the pipe 3 and the jacket for crystallization;

[0029] The bottom of tube 3 is suspended above the bottom of vessel 1. The bottom of vessel 1 is spherical, which facilitates liquid drainage. A second temperature sensor is installed at the bottom of vessel 1. The second temperature sensor monitors the heating temperature of the bottom of vessel 1 by heating wire 18 and feeds the data back to PLC controller 19. When the temperature is higher than the set value, PLC controller 19 controls heating wire 18 to turn off to prevent excessive temperature from affecting the quality of the molten liquid. When the temperature is too low, PLC controller 19 controls heating wire 18 to turn on. Heating wire 18 is wound around the bottom of vessel 1. During the crystal melting process, when hot water is injected into the jacket and tube 3, PLC controller 19... Simultaneously, the heating wire 18 is turned on to provide auxiliary heating to the bottom of the vessel 1. The dual heating mode accelerates the heating rate, allowing the crystals to melt quickly, improving efficiency and shortening the production cycle. The bottom of the vessel 1 is connected to a first discharge pipe, a second discharge pipe, and a third discharge pipe. Each discharge pipe is equipped with a solenoid valve. The end of the first discharge pipe is connected to a residual liquid tank 15, the end of the second discharge pipe is connected to a raw liquid tank 16, and the end of the third discharge pipe is connected to a finished product tank 17. When the crystals have all melted into liquid after heating, the PLC controller 19 controls the solenoid valve 3 on the third discharge pipe to open, collecting the target product into the finished product tank 17.

[0030] Two support rods are welded to the outer wall of the vessel body 1. The bottom of the two support rods is welded to a base plate 5. The support rods support the vessel body 1. Each water tank is placed on the base plate 5. A PLC controller 19 is connected to the outside of the vessel body 1. The PLC controller 19 is preferably the standard model JS-68T-D from Junchuang Automation Technology Co., Ltd. Each temperature sensor is electrically connected to the PLC controller 19. The temperature inside the vessel body 1 and the temperature at the bottom of the vessel body 1 are monitored by the two temperature sensors respectively. The temperature is controlled, and then the raw liquid is crystallized, sweated, and melted to obtain the target product.

[0031] In a preferred embodiment, a first water pump is installed in the cold water tank 9, and a second water pump and a third water pump are installed in the hot water tank 14. The first water pump is connected to a first water inlet pipe 7, the second water pump is connected to a second water inlet pipe 11, and the third water pump is connected to a branch pipe 13. Each water pump is electrically connected to a PLC controller 19.

[0032] As a preferred embodiment, the bottom of the vessel body 1 is provided with a jacket, and the heating wire 18 is located inside the jacket to avoid safety accidents caused by the heating wire 18 leaking out during the heating process.

[0033] As a preferred embodiment, the jacket on the outer wall of the vessel body 1 and the jacket at the bottom of the vessel body 1 are set independently to avoid the water flowing into the jacket affecting the working state of the heating wire 18.

[0034] In a preferred embodiment, a solenoid valve is provided on each of the first discharge pipe, the second discharge pipe, and the third discharge pipe, and the two solenoid valves are electrically connected to the PLC controller 19.

[0035] In a preferred embodiment, the PLC controller 19 is equipped with a display screen and several operation buttons. The display screen shows the heating temperature of the inner wall of the vessel body 1 and the bottom heating wire 18 monitored by two temperature sensors. The square button is used to set the temperature of the bottom of the vessel body 1 monitored by the second temperature sensor, and the round button is used to control the on / off status of each water pump, each solenoid valve and the heating wire 18.

[0036] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0037] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A melting crystallization apparatus, characterized in that, include: A vessel body (1) is provided with a cover (2) on the top of the vessel body (1). A feed inlet is provided on the top of the cover (2). A tube (3) is installed in the center of the cover (2). The tube (3) extends into the vessel body (1). A tube cap (4) is screwed onto the top of the tube (3). A temperature sensor (6) is installed on the inner wall of the vessel body (1). A jacket is provided on the outer wall of the vessel body (1). A first water inlet pipe (7) and a first water outlet pipe (8) are connected to the outer wall of the jacket. The first water inlet pipe (7) is connected to a cold water tank. 9) The first water outlet pipe (8) is connected to the water collection tank (10). A solenoid valve is installed on the first water inlet pipe (7). A branch pipe (13) is connected to the side wall of the first water inlet pipe (7). The branch pipe (13) is connected to the hot water tank (14). A solenoid valve is installed on the branch pipe (13). The top of the pipe cover (4) is connected to the second water inlet pipe (11) and the second water outlet pipe (12). The second water inlet pipe (11) is connected to the hot water tank (14). The second water outlet pipe (12) is connected to the water collection tank (10). The bottom of the tube (3) is suspended above the bottom of the vessel (1). The bottom of the vessel (1) is spherical. A temperature sensor (2) is installed at the bottom of the vessel (1). An electric heating wire (18) is wound around the bottom of the vessel (1). The bottom of the vessel (1) is connected to a first discharge pipe, a second discharge pipe, and a third discharge pipe. Each discharge pipe is equipped with a solenoid valve (3). The end of the first discharge pipe is connected to a residual liquid tank (15). The end of the second discharge pipe is connected to a raw liquid tank (16). The end of the third discharge pipe is connected to a finished product tank (17). Two support rods are welded to the outer wall of the vessel body (1), and the bottom of the two support rods is welded to a base plate (5). Each water tank is placed on the base plate (5). A PLC controller (19) is connected to the outside of the vessel body (1), and each temperature sensor is electrically connected to the PLC controller (19).

2. The melting and crystallization apparatus according to claim 1, characterized in that, The cold water tank (9) is equipped with a first water pump, and the hot water tank (14) is equipped with a second water pump and a third water pump. The first water pump is connected to a first water inlet pipe (7), the second water pump is connected to a second water inlet pipe (11), and the third water pump is connected to the branch pipe (13). Each of the water pumps is electrically connected to the PLC controller (19).

3. A melt crystallization apparatus according to claim 1, wherein The bottom of the vessel body (1) is provided with a jacket, and the heating wire (18) is located inside the jacket.

4. A melt crystallization apparatus according to claim 3, wherein The jacket on the outer wall of the vessel body (1) and the jacket at the bottom of the vessel body (1) are respectively set independently.

5. A melt crystallization apparatus according to claim 1, wherein Solenoid valve three is provided on the first discharge pipe, the second discharge pipe and the third discharge pipe, and the two solenoid valve three are electrically connected to the PLC controller (19).

6. A melt crystallization apparatus according to claim 1, wherein The PLC controller (19) is equipped with a display screen and several operation buttons.

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