Improved scraped-wall hollow plate cooling continuous crystallizer

Abstract

An improved wall scraping type hollow plate piece cooling continuous crystallization machine, including a shell, the shell is provided with a central shaft, a plurality of cooling plate pieces and a plurality of wall scraping assemblies, any one wall scraping assembly includes a mounting sleeve, a support and a scraper, the mounting sleeve is fixedly installed on the outer side of the central shaft, the mounting sleeve is connected with one end of at least one support, the side of the support towards the cooling plate piece is provided with a groove, the rear end of the scraper is deeply into the groove, the bottom surface of the groove is fixedly provided with a guide column, the rear end of the scraper is provided with a guide hole, the guide column is inserted into the guide hole, the guide column is sleeved with a spring, and the scraper is biased to the cooling plate piece by the spring. The rear end of the scraper is arranged in the groove of the support, so that the scraper can move towards the cooling plate piece, and the spring is arranged between the scraper and the bottom surface of the groove, so that the surface of the cooling plate piece can be pressed during the rotation of the scraper, and the crystal grains at the position passed by the scraper are completely scraped off.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, and more particularly to crystallizers, especially an improved scraped-wall hollow plate cooling continuous crystallizer. Background Technology

[0002] In existing technology, utility model patent CN212467186U discloses a high-efficiency scraping-type hollow plate cooling continuous crystallizer. In this crystallizer, a flow-blocking disc and a stirring scraper are installed between every two hollow cooling plates. All discs and stirring scrapers are coaxially mounted and driven by a motor and reducer to rotate. The scraping and stirring action cleans the cooling plates. The material to be crystallized flows from the inlet to the overflow outlet, undergoing multiple detours and contacting the cooling surfaces of the continuously scraping smooth hollow cooling plates and U-shaped jacket, causing continuous cooling and crystallization. Finally, the material flows out of the overflow outlet, continuously obtaining well-crystallized material. However, due to the large size of the cooling plates and the long length of the scraper, parallelism errors inevitably occur during assembly, causing gaps between the scraper and the surface of the cooling plates during rotation, resulting in incomplete cleaning. Summary of the Invention

[0003] The purpose of this utility model is to provide an improved scraper-type hollow plate cooling continuous crystallizer, which aims to solve the technical problem in the prior art where the gap between the scraper and the cooling plate in the crystallizer results in the cooling plate not being cleaned properly.

[0004] This improved scraper-type hollow plate cooling continuous crystallizer includes a housing. Inside the housing are a central shaft, multiple cooling plates, and multiple scraper assemblies. The side of any one of the cooling plates is fixedly connected to the inner wall of the housing. The multiple cooling plates are parallel to each other. The central shaft passes vertically through all the cooling plates. Each scraper assembly includes a support and a scraper. The support is mounted on the outside of the central shaft and has a groove on the side facing the cooling plate. The rear end of the scraper extends into the groove. A guide post is fixedly mounted on the bottom surface of the groove. A guide hole is provided at the rear end of the scraper, and the guide post extends into the guide hole. A spring is sleeved on the guide post, and the spring biases the scraper towards the cooling plate. One end of the central shaft is connected to a rotary drive device.

[0005] Furthermore, the cooling plate has a mounting groove that runs through the center and bottom of the cooling plate, the central shaft passes through the mounting groove on the side near the center of the cooling plate, and the side wall of the mounting groove is fixedly fitted with a stop block that is flush with both ends of the cooling plate.

[0006] Furthermore, the lower edge of the cooling plate is arc-shaped, the central axis is coaxial with the center of the arc, the length direction of the support is perpendicular to the central axis, and the length of the scraper is greater than or equal to the radius of the arc.

[0007] Furthermore, each of the aforementioned cooling plates is provided with a wall scraping assembly on both sides.

[0008] Furthermore, an mounting sleeve is fixedly installed on the outer side of the central shaft, and the two ends of the mounting sleeve are respectively connected to two wall scraping assemblies. The blades of the scrapers of the two wall scraping assemblies abut against the two sides of a cooling plate.

[0009] Furthermore, each of the aforementioned cooling plates is provided with a cavity, and the cooling plate is provided with a refrigerant inlet and a refrigerant outlet communicating with the cavity, and the refrigerant inlet and refrigerant outlet are connected to a refrigerant circulation pipeline.

[0010] Furthermore, a barrier plate is provided between any two cooling plates, and the barrier plate is fixedly connected to the central shaft or the housing.

[0011] Furthermore, a feed inlet is provided on one side of the housing, a discharge outlet is provided on the other side of the housing, and a drain outlet is provided at the bottom of the housing.

[0012] Furthermore, a first support frame is provided at one end of the housing, and a second support frame is provided at the other end of the housing. The two ends of the central shaft are respectively connected to the first support frame and the second support frame. The rotary drive device includes a motor and a reducer. The motor is installed on one side of the reducer, and the reducer is installed on one side of the second support frame. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the central shaft.

[0013] Compared with existing technologies, the advantages of this invention are positive and significant. This invention positions the rear end of the scraper within a groove in the support member, allowing the scraper to move towards the cooling plate. A spring is installed between the scraper and the bottom surface of the groove, pressing the scraper against the surface of the cooling plate during rotation, ensuring complete scraping of the grains along the scraper's path. This solves the technical problem of gaps between the cooling plate and the scraper surface, which previously resulted in incomplete grain removal. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram showing the combination of the cooling plate and the wall scraping assembly of this utility model.

[0016] Figure 3 yes Figure 2 AA section view of the wall scraping component.

[0017] Figure 4 This is a schematic diagram of the cooling plate of this utility model.

[0018] The markings in the diagram are as follows: 1. First support frame; 2. Housing; 201. Inlet; 202. Outlet; 203. Drain; 3. Refrigerant circulation pipeline; 4. Scraper assembly; 401. Mounting sleeve; 402. Support component; 403. Groove; 404. Guide column; 405. Spring; 406. Scraper; 407. Guide hole; 5. Cooling plate; 501. Refrigerant inlet; 502. Refrigerant outlet; 503. Mounting groove; 504. Stop block; 6. Barrier disc; 7. Second support frame; 8. Drive unit; 801. Motor; 802. Reducer; 9. Central shaft. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention.

[0020] like Figures 1-4 As shown, an improved scraped-wall hollow plate cooling continuous crystallizer of this utility model includes a housing 2. Inside the housing 2 are a central shaft 9, multiple cooling plates 5, and multiple scraping components 4. The side of any cooling plate 5 is fixedly connected to the inner wall of the housing 2, and the cooling plates 5 are parallel to each other. The central shaft 9 passes perpendicularly through all the cooling plates 5. Each scraping component 4 includes a support member 402 and a scraper 406. The support member 402 is installed on the outside of the central shaft 9. The support member 402 has a groove 403 on the side facing the cooling plate 5. The rear end of the scraper 406 extends into the groove 403. A guide post 404 is fixedly provided on the bottom surface of the groove 403. A guide hole 407 is provided at the rear end of the scraper 406. The guide post 404 extends into the guide hole 407. A spring 405 is sleeved on the guide post 404. The spring 405 biases the scraper 406 toward the cooling plate 5. One end of the central shaft 9 is connected to a rotary drive device 8.

[0021] Specifically, the slurry that needs to crystallize forms crystals on the surface of the cooling plate 5 under the cooling action of the cooling plate 5 in the shell 2. The rotary drive device 8 drives the central shaft 9 to rotate and drive the scraper assembly 5 to scrape off the crystals on the surface of the cooling plate 5. The support member 402 is used to install the scraper 406 and support the scraper 406. The rear end of the scraper 405 is set in the groove 403 so that the scraper 406 can move towards the cooling plate 5. The guide post 404 cooperates with the guide hole 407 to limit the radial movement of the scraper 406, prevent the scraper 406 from falling out, and ensure the scraper 406 scrapes the wall position. The spring 405 biases the scraper 406 towards the cooling plate 5 to keep the scraper 406 in contact with the cooling plate 5, ensuring that the scraper 406 scrapes the cooling plate 5 clean.

[0022] Furthermore, the cooling plate 5 has a mounting groove 503 that runs through the center and bottom of the cooling plate 5. The central shaft 9 passes through the mounting groove 503 on the side near the center of the cooling plate 5. A stop block 504 flush with both ends of the cooling plate 5 is fixedly installed on the side wall of the mounting groove 503.

[0023] Specifically, the mounting slot 503 is provided to facilitate the installation of the central shaft 9 in the housing 2 first, and then the cooling plate 5 is installed into the housing 2 by passing the central shaft 9 through the mounting slot 503. Then the stop block 504 is installed. The stop block 504 is provided so that when the scraper 405 rotates to the position of the mounting slot 503, it will abut against the outside of the stop block 504 and will not fall into the mounting slot 503.

[0024] Furthermore, the lower edge of the cooling plate 5 is arc-shaped, the central axis 9 is coaxial with the center of the arc, the length direction of the support member 402 is perpendicular to the central axis 9, and the length of the scraper 406 is greater than or equal to the radius of the arc.

[0025] Specifically, the lower side of the cooling plate 5 is set to an arc shape, and the length of the scraper 406 is greater than or equal to the radius of the arc. This allows the scraping area of ​​the scraper 406 to at least cover the lower surface of the cooling plate 5. Then, the liquid level of the slurry can be set as needed, for example, by setting the height of the outlet 203 to control the liquid level of the slurry. This ensures that the crystallization range of the slurry on the surface of the cooling plate 5 is included within the range that the scraper 406 can completely scrape off, so that the scraper 406 can completely scrape off the grains and obtain uniform grains after scraping.

[0026] Furthermore, each of the cooling plates 5 is provided with a wall scraping assembly 4 on both sides.

[0027] Specifically, by setting scraping components 4 on both sides of any cooling plate 5, the grains on all cooling surfaces can be scraped.

[0028] Furthermore, an installation sleeve 401 is fixedly installed on the outer side of the central shaft 9. The two ends of the installation sleeve 401 are respectively connected to two wall scraping assemblies 4, and the blades of the scrapers 406 of the two wall scraping assemblies 4 respectively abut against the two sides of a cooling plate 5.

[0029] Specifically, the wall scraping assembly 4 is installed outside the central shaft 9 via the mounting sleeve 401. The mounting sleeve 401 can be set at a position corresponding to the cooling plate 5. The center of the axis of the mounting sleeve 401 can be aligned with the midpoint of the thickness of the cooling plate 5. By setting the wall scraping assembly 4 on both sides of the mounting sleeve 401, both sides of the cooling plate 5 can be scraped simultaneously.

[0030] Furthermore, each of the cooling plates 5 is provided with a cavity, and the cooling plate 5 is provided with a refrigerant inlet 501 and a refrigerant outlet 502 communicating with the cavity. The refrigerant inlet 501 and the refrigerant outlet 502 are connected to the refrigerant circulation pipeline 3.

[0031] Specifically, by circulating refrigerant through the refrigerant circulation pipe 3 into the cooling plate 5, the cooling plate 5 can be kept at a low temperature. In conjunction with the scraper 405 scraping off the grains outside the cooling plate 5, the surface of the cooling plate 5 can be continuously crystallized.

[0032] Furthermore, a barrier plate 6 is provided between any two cooling plates 5, and the barrier plate 6 is fixedly connected to the central shaft 9 or the housing 2.

[0033] Specifically, during continuous crystallization, setting up the barrier plate 6 can slow down the flow rate of the slurry, allowing the slurry to fully contact the cooling plate 5, and cool and crystallize on the surface of the cooling plate 5, thereby improving the crystallization efficiency.

[0034] Furthermore, a feed inlet 201 is provided on one side of the housing 2, a discharge outlet 202 is provided on the other side of the housing 2, and a drain outlet 203 is provided at the bottom of the housing 2.

[0035] Specifically, the slurry that needs to be crystallized is injected into the shell 2 through the feed port 201. After being cooled and crystallized by the cooling plates 5 inside the shell 2, the slurry is discharged from the discharge port 202. The crystallized material is discharged from the drain port 203.

[0036] Furthermore, a first support frame 1 is provided at one end of the housing 2, and a second support frame 7 is provided at the other end of the housing 2. The two ends of the central shaft 9 are respectively connected to the first support frame 1 and the second support frame 7. The rotary drive device 8 includes a motor 801 and a reducer 802. The motor 801 is installed on one side of the reducer 802, and the reducer 802 is installed on one side of the second support frame 7. The output shaft of the motor 801 is connected to the input shaft of the reducer 802, and the output shaft of the reducer 802 is connected to the central shaft 9.

[0037] Specifically, the first support frame 1 and the second support frame 2 are used to provide slewing support for both ends of the central shaft 9, and a shaft seal is provided to prevent liquid from leaking out between the central shaft 9 and the housing. The motor 801 serves as the power source for the rotary drive device 8, inputting power into the reducer 802. The reducer 802 amplifies the torque to drive the central shaft 9 to rotate.

[0038] In use, this invention first introduces refrigerant into the cavity of the cooling plate 5 through the refrigerant circulation pipe 3. Then, the slurry is injected into one side of the housing 2 through the inlet 201. As the slurry passes over the surface of the cooling plate 5, it cools and crystallizes. The rotary drive device 8 drives the central shaft 9 to rotate, which in turn drives the scraper assembly 4 to rotate. The spring 405 biases the scraper 406 toward the cooling plate 5, making the scraper 406 adhere to the surface of the cooling plate 5. As the scraper 406 rotates, it completely scrapes off the crystals from the surface of the cooling plate 5. The crystallized slurry is discharged from the outlet 202. After crystallization, the drain port 203 is opened to discharge the crystallized material. If larger crystals are required, the slurry can be introduced first without turning on the stirring drive device 8. After crystallization is complete, the stirring device 8 can be turned on to scrape the crystals off the surface of the cooling plate 5.

Claims

1. An improved scraped-wall type hollow plate cooling continuous crystallizer, comprising a shell (2), characterized in that: The housing (2) contains a central shaft (9), multiple cooling plates (5), and multiple wall scraping assemblies (4). The side of any one of the cooling plates (5) is fixedly connected to the inner wall of the housing (2). The multiple cooling plates (5) are parallel to each other. The central shaft (9) passes vertically through all the cooling plates (5). Each wall scraping assembly (4) includes a support member (402) and a scraper (406). The support member (402) is installed on the outside of the central shaft (9), and the support member (402) faces the cooling plates (9). 5) has a groove (403) on one side, the rear end of the scraper (406) is inserted into the groove (403), the bottom surface of the groove (403) is fixedly provided with a guide post (404), the rear end of the scraper (406) is provided with a guide hole (407), the guide post (404) extends into the guide hole (407), the guide post (404) is covered with a spring (405), the spring (405) biases the scraper (406) toward the cooling plate (5), and one end of the central shaft (9) is connected to a rotary drive device (8).

2. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: The cooling plate (5) has a mounting groove (503) that runs through the center and bottom of the cooling plate (5). The central shaft (9) passes through the mounting groove (503) on the side near the center of the cooling plate (5). The side wall of the mounting groove (503) is fixedly equipped with a stop block (504) that is flush with both ends of the cooling plate (5).

3. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: The lower edge of the cooling plate (5) is arc-shaped, the central axis (9) is coaxial with the center of the arc, the length direction of the support (402) is perpendicular to the central axis (9), and the length of the scraper (406) is greater than or equal to the radius of the arc.

4. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: Each of the cooling plates (5) is provided with a wall scraping assembly (4) on both sides.

5. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: An installation sleeve (401) is fixedly installed on the outside of the central shaft (9). The two ends of the installation sleeve (401) are respectively connected to two wall scraping assemblies (4). The blades of the scrapers (406) of the two wall scraping assemblies (4) respectively abut against the two sides of a cooling plate (5).

6. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: Each of the cooling plates (5) is provided with a cavity. The cooling plate (5) is provided with a refrigerant inlet (501) and a refrigerant outlet (502) that communicate with the cavity. The refrigerant inlet (501) and the refrigerant outlet (502) are connected to the refrigerant circulation pipeline (3).

7. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: A barrier plate (6) is provided between any two cooling plates (5), and the barrier plate (6) is fixedly connected to the central shaft (9) or the housing (2).

8. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: The housing (2) has a feed inlet (201) on one side and a discharge outlet (202) on the other side. The housing (2) also has a drain outlet (203) at the bottom.

9. The improved scraped-wall hollow plate cooling continuous crystallizer as described in claim 1, characterized in that: One end of the housing (2) is provided with a first support frame (1), and the other end of the housing (2) is provided with a second support frame (7). The two ends of the central shaft (9) are respectively connected to the first support frame (1) and the second support frame (7). The rotary drive device (8) includes a motor (801) and a reducer (802). The motor (801) is installed on one side of the reducer (802), and the reducer (802) is installed on one side of the second support frame (7). The output shaft of the motor (801) is connected to the input shaft of the reducer (802), and the output shaft of the reducer (802) is connected to the central shaft (9).

Images