Adipic acid BHC type single-stage continuous cooling crystallizer

Abstract

The utility model relates to the technical field of cooling crystallization, specifically to a BHC type adipic acid single-stage continuous cooling crystallizer, comprising a crystallizer body, a vertical axial flow pump, the surface of the vertical axial flow pump is fixedly installed on the bottom of the crystallizer body, a slurry barrel, the input end of the slurry barrel is fixedly connected to the output end of the crystallizer body, a centrifugal separator, the input end of the centrifugal separator is fixed to the output end of the slurry barrel, the input end of a condenser is fixed to the output end of the top of the crystallizer body, a liquid ring vacuum unit, the output end of the liquid ring vacuum unit is fixedly connected to the input end of the condenser, a condensate tank, the input end of the condensate tank is fixed to the output end of the condensate, a condensate pump, the input end of the condensate pump is fixed to the output end of the condensate tank, a mounting cover is installed on the upper end surface of the slurry barrel, a stirring mechanism for stirring the slurry is installed inside the mounting cover, and a fixing mechanism is installed between the slurry barrel and the mounting cover to facilitate cleaning of the inside of the slurry barrel.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling crystallization, in particular to a BHC type adipic acid single-stage continuous cooling crystallizer. Background Art

[0002] The particle size distribution of oxalic acid usually refers to the proportion of particles of a certain size or a certain size range in the entire crystal. It can be expressed in simple tables, plots and function forms to represent the distribution state of the particle size of a particle group. The particle size, particle size distribution and shape of the particles can significantly affect the properties and uses of the slurry and its products. In order to understand the working conditions of the production line and whether the products are qualified, samples must be taken on time during the production process and the particle size distribution of the products must be tested. Particle size measurement is also required for crushing and grading. There are many methods for particle size determination, commonly used ones are sieving analysis, sedimentation, laser, small hole method, adsorption method, etc., and the slurry barrel needs to be stirred when in use to prevent the original slurry from maintaining the best viscosity.

[0003] A Chinese patent (authorization announcement number: CN111375224A) proposes an oxalic acid single-stage vacuum continuous cooling crystallizer. The oxalic acid single-stage vacuum continuous cooling crystallizer includes a crystallizer; a vertical axial flow pump, which is installed on the bottom side of the crystallizer; a slurry barrel, which is connected to the crystallizer; a centrifuge, which is connected to the slurry barrel; a mother liquor barrel, which is connected to the centrifuge; a first mother liquor pump, which is installed on one side of the mother liquor barrel and connected to the mother liquor barrel, and the first mother liquor pump is connected to the crystallizer; a second mother liquor pump, which is connected to the crystallizer; a discharge pump, which is connected to the crystallizer, and the discharge pump is connected to the slurry barrel. The oxalic acid single-stage vacuum continuous cooling crystallizer provided by the present invention has the advantages of short crystallization cycle, large crystal size, high product purity, beautiful appearance, high crystallization ability and low energy consumption.

[0004] When the above scheme is used, the raw pulp needs to be fully stirred and kept in a good viscosity during the production process. In order to ensure that the raw pulp maintains the best viscosity during the production process, we propose adipic acid BHC type single-stage continuous cooling crystallizer. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a BHC-type single-stage continuous cooling crystallizer for adipic acid, which solves the background problem.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] Adipic acid BHC type single-stage continuous cooling crystallizer, crystallizer body;

[0008] A vertical axial flow pump, the surface of which is fixedly mounted on the bottom of the crystallizer body;

[0009] A slurry barrel, the input end of which is fixedly connected to the output end of the crystallizer body;

[0010] A centrifugal separator, wherein the input end of the centrifugal separator is fixed to the output end of the slurry barrel;

[0011] A mother liquid barrel, the input end of which is fixed to the output end of the centrifuge, and the input end of which is fixedly connected to one side of the output end of the slurry barrel;

[0012] A first mother liquid pump, wherein an input end of the first mother liquid pump is fixed to an output end of the mother liquid barrel;

[0013] A second mother liquid pump, wherein the input end of the second mother liquid pump is fixed to the output end of the crystallizer body;

[0014] A discharge pump, the input end of which is fixed to the output end of the crystallizer body;

[0015] A condenser, wherein the input end of the condenser is fixed to the output end of the top end of the crystallizer body;

[0016] A liquid ring vacuum unit, wherein the output end of the liquid ring vacuum unit is fixedly connected to the input end of the condenser;

[0017] A condensation water tank, the input end of which is fixed to the output end of the condenser;

[0018] A condensate water pump, wherein the input end of the condensate water pump is fixed to the output end of the condensate water tank;

[0019] A mounting cover is installed at the upper end of the slurry barrel, a stirring mechanism for stirring the slurry is installed inside the mounting cover, and a fixing mechanism is installed between the slurry barrel and the mounting cover.

[0020] As a further embodiment of the present invention, the input end of the crystallizer body is connected to the stock liquid input port, and the stock liquid input port inputs the stock liquid into the interior of the crystallizer body for heat exchange, cooling and crystallization. The output end of the discharge pump is fixedly connected to the input end of the slurry barrel, and the output end of the first mother liquid pump is fixedly connected to the input end of the crystallizer body.

[0021] As a further feature of this solution, the input end of the second mother liquor pump is connected to the upper clear mother liquor inside the crystallizer body, and is used to extract the upper clear mother liquor from the inside of the crystallizer body. The first mother liquor pump, the second mother liquor pump, the discharge pump, the liquid ring vacuum unit and the condensate pump are all connected to the circulating pump cooling water for cooling and heat dissipation.

[0022] As a further feature of the present invention, the stirring mechanism includes a driving motor, which is fixedly mounted on the upper end of the mounting cover, and the output end of the driving motor is fixedly connected to the first pulley, the upper end of the mounting cover is rotatably connected to the second pulley, and a tensioning sleeve between the second pulley and the first pulley is provided with a pulling belt, the bottom of the second pulley is fixedly connected to a swing arm, the end of the swing arm away from the second pulley is rotatably connected to an engaging rack, the bottom of the mounting cover is fixedly connected to a connecting column, the outer wall of the connecting column is rotatably connected to a sliding sleeve, the end of the meshing rack close to the sliding sleeve is slidably connected to the inner wall of the sliding sleeve, the outer wall of the connecting column is rotatably connected to an internal gear, and the internal gear and the meshing rack are meshed with each other.

[0023] As a further embodiment of the present invention, the bottom of the internal gear is fixedly connected to a fixed plate, the bottom of the fixed plate is fixedly connected to a first bevel gear, the bottom of the first bevel gear is fixedly connected to four groups of stirring plates, the bottom of the connecting column is rotatably connected to two groups of second bevel gears, the two groups of second bevel gears are meshed with the first bevel gear, the bottom of the connecting column is rotatably connected to a third bevel gear, the third bevel gear is meshed with the two groups of second bevel gears, the bottom of the third bevel gear is fixedly connected to a fixed square column, and the bottom of the fixed square column is fixedly connected to four groups of connecting rods.

[0024] As a further feature of the present invention, the fixing mechanism includes four groups of elastic telescopic arms, and the four groups of elastic telescopic arms are rotatably mounted on the upper end of the mounting cover. A reset spring is installed inside the elastic telescopic arm, a pull rod is fixedly connected to the top of the inner wall of the elastic telescopic arm, and a clamping block is fixedly connected to the upper end of the elastic telescopic arm, and the bottom of the clamping block is clamped with the mounting cover.

[0025] Beneficial Effects

[0026] The utility model provides a BHC type single-stage continuous cooling crystallizer for adipic acid. Compared with the prior art, it has the following beneficial effects:

[0027] The working process of the adipic acid BHC single-stage continuous cooling crystallizer can be specifically referred to the comparative documents, and when the raw pulp enters the slurry barrel and the inside of the slurry barrel, the driving motor is started, and the driving motor drives the pulling belt to rotate through the first pulley, and the pulling belt drives the swing arm to rotate through the second pulley, and the swing arm drives the internal gear to rotate through the meshing rack, and the internal gear drives the stirring plate to stir the raw pulp through the fixed plate, and the fixed plate also drives the two sets of second bevel gears to rotate through the first bevel gear, and the second bevel gear drives the third bevel gear and the fixed square column to rotate at the same time, and the fixed square column drives four sets of connecting rods to rotate, so that the raw pulp can be stirred in all directions through the stirring plate and the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the appearance of the main slurry barrel of the utility model;

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure of the main slurry barrel of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the main stirring mechanism of the utility model;

[0031] Figure 4 This is a schematic diagram of the position structure of the main body fixing mechanism of the utility model;

[0032] Figure 5 It is a work flow chart (and is the prior art).

[0033] In the figure: 1, crystallizer body; 2, vertical axial flow pump; 3, slurry barrel; 4, centrifugal separator; 5, mother liquor barrel; 6, first mother liquor pump; 7, second mother liquor pump; 8, discharge pump; 9, condenser; 10, liquid ring vacuum unit; 11, condensate tank; 12, condensate pump; 13, pull rod; 14, pull belt; 15, second pulley; 16, drive motor; 17, installation cover; 18, stirring plate; 19, block; 20, connecting rod; 21, swing arm; 22, sliding sleeve; 23, meshing rack; 24, connecting column; 25, internal gear; 26, fixed plate; 27, first bevel gear; 28, second bevel gear; 29, third bevel gear; 30, fixed square column; 31, elastic telescopic arm; 32, pull rod; 101, stirring mechanism; 201, fixing mechanism. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Example 1: Please refer to Figure 1 , 2As shown in , 3, the utility model provides a technical solution: adipic acid BHC type single-stage continuous cooling crystallizer, a crystallizer body 1, a vertical axial flow pump 2, the surface of the vertical axial flow pump 2 is fixedly installed on the bottom of the crystallizer body 1, a slurry barrel 3, the input end of the slurry barrel 3 is fixedly connected to the output end of the crystallizer body 1, a centrifuge 4, the input end of the centrifuge 4 is fixed to the output end of the slurry barrel 3, a mother liquid barrel 5, the input end of the mother liquid barrel 5 is fixed to the output end of the centrifuge 4, the input end of the mother liquid barrel 5 is fixedly connected to one side of the output end of the slurry barrel 3, a first mother liquid pump 6, the input end of the first mother liquid pump 6 is fixed to the output end of the mother liquid barrel 5, and a second mother liquid pump 7, the input end of the second mother liquid pump 7 Fixed to the output end of the crystallizer body 1, a discharge pump 8, the input end of the discharge pump 8 is fixed to the output end of the crystallizer body 1, a condenser 9, the input end of the condenser 9 is fixed to the output end of the top of the crystallizer body 1, a liquid ring vacuum unit 10, the output end of the liquid ring vacuum unit 10 is fixedly connected to the input end of the condenser 9, a condensate tank 11, the input end of the condensate tank 11 is fixed to the output end of the condenser 9, a condensate pump 12, the input end of the condensate pump 12 is fixed to the output end of the condensate tank 11, a mounting cover 17 is installed on the upper end surface of the slurry barrel 3, a stirring mechanism 101 for stirring the slurry is installed inside the mounting cover 17, and a fixing mechanism 201 is installed between the slurry barrel 3 and the mounting cover 17.

[0036] Example 2: Please refer to Figure 1 , 2 As shown in FIG. 3 , the input end of the crystallizer body 1 is connected to the raw liquid input port, and the raw liquid input port inputs the raw liquid into the interior of the crystallizer body 1 for heat exchange, cooling and crystallization. The output end of the discharge pump 8 is fixedly connected to the input end of the slurry barrel 3, and the discharge pump 8 sends the raw liquid after heat exchange, cooling and crystallization into the slurry barrel 3 for stirring, and then sends the stirred raw liquid into the centrifuge 4 for centrifugation, and puts the mother liquor obtained after centrifugation into the interior of the mother liquor barrel 5. The output end of the first mother liquor pump 6 is fixedly connected to the input end of the crystallizer body 1, and the first mother liquor pump 6 transports the wood leaves inside the mother liquor barrel 5 to the interior of the crystallizer body 1 for continuous circulation, heat exchange, cooling and crystallization.

[0037] The input end of the second mother liquor pump 7 is connected to the upper clear mother liquor inside the crystallizer body 1, and is used to extract the upper clear mother liquor from the inside of the crystallizer body 1. The condenser 9 recovers and condenses the steam generated inside the crystallizer body 1 to obtain condensed water, which is input into the condensed water tank 11 and then sent out by the condensed water pump 12. The first mother liquor pump 6, the second mother liquor pump 7, the discharge pump 8, the liquid ring vacuum unit 10 and the condensed water pump 12 are all connected to the circulating pump cooling water for cooling and heat dissipation. The condenser 9 has chilled water circulating inside to help it exchange heat and condense the steam in the crystallizer.

[0038] See also Figure 2 ,3 As shown in , 4, the stirring mechanism 101 includes a driving motor 16, the driving motor 16 is fixedly mounted on the upper end of the mounting cover 17, the output end of the driving motor 16 is fixedly connected to the first pulley, the upper end of the mounting cover 17 is rotatably connected to the second pulley 15, and the tensioning sleeve between the second pulley 15 and the first pulley is provided with a pulling belt 14, the bottom of the second pulley 15 is fixedly connected to a swing arm 21, and the second pulley 15 is inserted into the interior of the mounting cover 17, and the end of the swing arm 21 away from the second pulley 15 is rotatably connected to a meshing rack 23, the bottom of the mounting cover 17 is fixedly connected with a connecting column 24, the outer wall of the connecting column 24 is rotatably connected with a sliding sleeve 22, and the end of the meshing rack 23 close to the sliding sleeve 22 is slidably connected with the inner wall of the sliding sleeve 22. Specifically, a sliding groove is provided inside the sliding sleeve 22, and the end of the meshing rack 23 close to the sliding sleeve 22 is fixedly connected with a sliding bar, and the outer wall of the sliding bar is slidably connected with the inner wall of the sliding groove. More specifically, the inner wall of the sliding groove and the outer surface of the sliding bar are coated with lubricating oil, and the lubricating oil can effectively reduce the friction of the meshing rack 23 inside the sliding sleeve 22. The sliding sleeve 22 can guide the meshing rack 23, and the sliding sleeve 22 can also limit the meshing rack 23 through the sliding groove. The outer wall of the connecting column 24 is rotatably connected to the internal gear 25, and the internal gear 25 is meshed with the meshing rack 23. The bottom of the internal gear 25 is fixedly connected to a fixed disk 26, and the fixed disk 26 is sleeved on the outer wall of the connecting column 24. The bottom of the fixed disk 26 is fixedly connected to a first bevel gear 27, and the bottom of the first bevel gear 27 is fixedly connected to four groups of stirring plates 18, and the four groups of stirring plates 18 are all distributed in a circle with the driving motor 16 as the center, two sets of second bevel gears 28 are rotatably connected to the bottom of the connecting column 24, and the two sets of first bevel gears 27 are symmetrically distributed, the two sets of second bevel gears 28 are meshed with the first bevel gears 27, the bottom of the connecting column 24 is rotatably connected to the third bevel gear 29, the third bevel gear 29 is meshed with the two sets of second bevel gears 28, the bottom of the third bevel gear 29 is fixedly connected to a fixed square column 30, and the bottom of the fixed square column 30 is fixedly connected to four sets of connecting rods 20.

[0039] See also Figure 2 , 5 As shown, the fixing mechanism 201 includes four groups of elastic telescopic arms 31, and the four groups of elastic telescopic arms 31 are all rotatably installed on the upper end of the installation cover 17, and the four groups of elastic telescopic arms 31 are distributed in a circle, a reset spring is installed inside the elastic telescopic arm 31, a pulling rod 32 is fixedly connected to the top of the inner wall of the elastic telescopic arm 31, a clamping block 19 is fixedly connected to the upper end of the elastic telescopic arm 31, and the bottom of the clamping block 19 is clamped with the installation cover 17, and a pulling rod 13 is fixedly connected to the outer wall of the elastic telescopic arm 31 for the operator to rotate the elastic telescopic arm 31.

[0040] Working principle: The working process of the adipic acid BHC type single-stage continuous cooling crystallizer can be specifically referred to the comparative documents, and when the raw pulp enters the slurry barrel 3, the driving motor 16 is started inside the slurry barrel 3, and the driving motor 16 drives the pulling belt 14 to rotate through the first pulley, and the pulling belt 14 drives the swing arm 21 to rotate through the second pulley 15, and the swing arm 21 drives the internal gear 25 to rotate through the meshing rack 23, and the internal gear 25 then drives the stirring plate 18 to stir the raw pulp through the fixed plate 26, and the fixed plate 26 will also drive the two sets of second bevel gears 28 to rotate through the first bevel gear 27, and the second bevel gear 28 drives the third bevel gear 29 and the fixed square column 30 to rotate at the same time, and the fixed square column 30 drives the four sets of connecting rods 20 to rotate, so that the raw pulp can be stirred in all directions through the stirring plate 18 and the connecting rod 20;

[0041] When the slurry barrel 3 and the inside of the slurry barrel 3 need to be cleaned, it is only necessary to pull the rod 32. When the pulling rod 32 drives the block 19 to disengage from the abutment with the mounting cover 17, the elastic telescopic arm 31 is rotated to make the block 19 leave the top of the mounting cover 17, so that the mounting cover 17 can be disassembled, which is convenient for cleaning the inside of the slurry barrel 3.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Adipic acid BHC type single-stage continuous cooling crystallizer, characterized by: It comprises a crystallizer body (1); A vertical axial flow pump (2), the surface of the vertical axial flow pump (2) being fixedly mounted on the bottom of the crystallizer body (1); A slurry barrel (3), the input end of the slurry barrel (3) being fixedly connected to the output end of the crystallizer body (1); A centrifugal separator (4), wherein the input end of the centrifugal separator (4) is fixed to the output end of the slurry barrel (3); A mother liquid barrel (5), wherein the input end of the mother liquid barrel (5) is fixed to the output end of the centrifuge (4), and the input end of the mother liquid barrel (5) is fixedly connected to one side of the output end of the slurry barrel (3); A first mother liquid pump (6), wherein the input end of the first mother liquid pump (6) is fixed to the output end of the mother liquid barrel (5); A second mother liquid pump (7), wherein the input end of the second mother liquid pump (7) is fixed to the output end of the crystallizer body (1); A discharge pump (8), the input end of the discharge pump (8) being fixed to the output end of the crystallizer body (1); A condenser (9), wherein the input end of the condenser (9) is fixed to the output end at the top end of the crystallizer body (1); A liquid ring vacuum unit (10), wherein the output end of the liquid ring vacuum unit (10) is fixedly connected to the input end of the condenser (9); A condensation water tank (11), wherein an input end of the condensation water tank (11) is fixed to an output end of the condenser (9); A condensate water pump (12), wherein an input end of the condensate water pump (12) is fixed to an output end of the condensate water tank (11); The upper end surface of the slurry barrel (3) is provided with a mounting cover (17), a stirring mechanism (101) capable of stirring the slurry is installed inside the mounting cover (17), and a fixing mechanism (201) is installed between the slurry barrel (3) and the mounting cover (17).

2. The adipic acid BHC type single-stage continuous cooling crystallizer according to claim 1, characterized in that: The input end of the crystallizer body (1) is connected to the raw liquid input port, and the raw liquid input port inputs the raw liquid into the interior of the crystallizer body (1) for heat exchange, cooling and crystallization. The output end of the discharge pump (8) is fixedly connected to the input end of the slurry barrel (3), and the output end of the first mother liquid pump (6) is fixedly connected to the input end of the crystallizer body (1).

3. The adipic acid BHC type single-stage continuous cooling crystallizer according to claim 1, characterized in that: The input end of the second mother liquor pump (7) is connected to the upper clear mother liquor inside the crystallizer body (1) and is used to extract the upper clear mother liquor from the inside of the crystallizer body (1). The first mother liquor pump (6), the second mother liquor pump (7), the discharge pump (8), the liquid ring vacuum unit (10) and the condensate pump (12) are all connected to the circulating pump cooling water for cooling and heat dissipation.

4. The adipic acid BHC type single-stage continuous cooling crystallizer according to claim 1, characterized in that: The stirring mechanism (101) comprises a driving motor (16), the driving motor (16) is fixedly mounted on the upper end of a mounting cover (17), the output end of the driving motor (16) is fixedly connected to a first belt pulley, the upper end of the mounting cover (17) is rotatably connected to a second belt pulley (15), a tensioning sleeve between the second belt pulley (15) and the first belt pulley is provided with a pulling belt (14), the bottom of the second belt pulley (15) is fixedly connected to a swing arm (21), and the swing arm (21) ) is rotatably connected to an engaging rack (23) at one end away from the second pulley (15), a connecting column (24) is fixedly connected to the bottom of the mounting cover (17), the outer wall of the connecting column (24) is rotatably connected to a sliding sleeve (22), the end of the engaging rack (23) close to the sliding sleeve (22) is slidably connected to the inner wall of the sliding sleeve (22), the outer wall of the connecting column (24) is rotatably connected to an internal gear (25), and the internal gear (25) and the engaging rack (23) are meshed with each other.

5. The adipic acid BHC type single-stage continuous cooling crystallizer according to claim 4, characterized in that: The bottom of the internal gear (25) is fixedly connected to a fixed plate (26), the bottom of the fixed plate (26) is fixedly connected to a first bevel gear (27), the bottom of the first bevel gear (27) is fixedly connected to four groups of stirring plates (18), the bottom of the connecting column (24) is rotatably connected to two groups of second bevel gears (28), the two groups of second bevel gears (28) are mutually meshed with the first bevel gear (27), the bottom of the connecting column (24) is rotatably connected to a third bevel gear (29), the third bevel gear (29) is mutually meshed with the two groups of second bevel gears (28), the bottom of the third bevel gear (29) is fixedly connected to a fixed square column (30), and the bottom of the fixed square column (30) is fixedly connected to four groups of connecting rods (20).

6. The adipic acid BHC type single-stage continuous cooling crystallizer according to claim 1, characterized in that: The fixing mechanism (201) comprises four groups of elastic telescopic arms (31), and the four groups of elastic telescopic arms (31) are all rotatably mounted on the upper end of the mounting cover (17). A reset spring is installed inside the elastic telescopic arm (31). A pulling rod (32) is fixedly connected to the top of the inner wall of the elastic telescopic arm (31). A clamping block (19) is fixedly connected to the upper end of the elastic telescopic arm (31), and the bottom of the clamping block (19) is clamped with the mounting cover (17).

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