An integrated evaporator applied to high-concentration mother liquor

Abstract

The application discloses an integrated evaporator applied to high-concentration mother liquor, which comprises an evaporation box body, a heat exchanger is installed on the top of the evaporation box body, the top of the evaporation box body is connected with the heat exchanger through an exhaust pipe, a partition plate is installed on the middle of the evaporation box body and is connected with the inner surfaces of the two sides and the back side of the evaporation box body, the partition plate divides the evaporation box body into an evaporation area and a material collecting area, the partition plate is provided as an upwardly-inclined partition part close to the front part of the evaporation box body, a material discharging area is formed between the partition part and the front side of the evaporation box body, the evaporation area and the material collecting area are communicated through the material discharging area, the evaporator overcomes the defects of the prior art, can integrally process the high-concentration mother liquor, realizes the separation of solvents and non-volatile components, and can effectively solve the problem that the scraped material is prone to be accumulated in the material guide plate.

Description

Technical Field

[0001] This invention relates to the field of evaporator technology, specifically to an integrated evaporator for use with high-concentration mother liquor. Background Technology

[0002] MVR evaporators are stand-alone evaporators that can perform segmented evaporation depending on the required product concentration. If the product does not reach the desired concentration after the first pass through the evaporator, it is pumped back up through external piping to the top of the evaporator by a vacuum pump at the bottom, passing through it again. This repeated process is repeated until the desired concentration is achieved, forming a high-concentration mother liquor, such as pharmaceutical raw materials and landfill leachate. The non-volatile components in high-concentration mother liquor are difficult to separate effectively using simple treatment methods. While existing disc evaporators can separate non-volatile components from the solvent, they cannot achieve integrated processing. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated evaporator for high-concentration mother liquor, which overcomes the shortcomings of the prior art, enables integrated processing of high-concentration mother liquor, achieves separation of solvent and non-volatile components, and effectively solves the problem of scraped material easily accumulating in the feed plate.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] An integrated evaporator for high-concentration mother liquor includes an evaporation chamber, a heat exchanger installed on the top of the evaporation chamber, the top of the evaporation chamber being connected to the heat exchanger via an exhaust pipe, a partition plate installed in the middle of the evaporation chamber and connected to the inner surfaces of the sides and rear of the evaporation chamber, the partition plate dividing the evaporation chamber into an evaporation zone and a receiving zone, the partition plate having an upwardly inclined dividing section near the front of the evaporation chamber, forming a feeding zone between the dividing section and the front side of the evaporation chamber, the evaporation zone and the receiving zone being connected through the feeding zone;

[0006] The evaporation chamber in the evaporation zone is equipped with a main shaft, which is connected to a drive device. Several parallel discs are arranged on the main shaft in the evaporation zone. The discs rotate clockwise. Each disc has a liquid distributor on its two sides. The disc surface is equipped with a scraping device corresponding to the liquid distributor. The scraping device is located on the right disc of the main shaft. The scraping device is inclined on the surface of the disc through a transmission frame installed at the front of the evaporation chamber. The lower end of the scraping device is located above the feeding area. The evaporation chamber above the partition is equipped with a liquid inlet pipe, a liquid outlet pipe, and an air inlet pipe. The liquid distributor is connected to the liquid inlet pipe. High-concentration mother liquor enters the liquid distributor from the liquid inlet pipe. The air inlet pipe introduces airflow of 60-180°C into the evaporation zone. The high-concentration mother liquor is sprayed onto the discs. The high-concentration mother liquor on the discs is heated and evaporated by the airflow to form steam.

[0007] The material receiving area below the material feeding area is equipped with a discharge auger, which sends the material in the receiving area out of the evaporator. The top of the evaporator sends steam into the heat exchanger through the exhaust pipe. The steam is condensed and liquefied, and then discharged from the heat exchanger.

[0008] The evaporator body has a support frame on each side, and a bearing seat is installed on each support frame. The two ends of the main shaft are installed in the bearing seats. The main shaft is connected to the evaporator body through a sealed bearing, so that the main shaft can rotate freely on the evaporator body.

[0009] The drive device includes a motor, a reducer, a drive pulley, and a driven pulley. The motor is connected to the reducer in a transmission manner. The drive pulley is mounted on the shaft of the reducer, and the driven pulley is mounted on the right end of the main shaft. The drive pulley and the driven pulley are connected in a transmission belt. The motor is powered by an external power source.

[0010] The liquid distributor is a liquid distribution pipe, the top of which is located on the upper part of the disk below the main shaft, and the top of the liquid distribution pipe is inclined downward toward the disk.

[0011] The transmission frame includes several support rods located at the front of the evaporator body. Each scraping device corresponds to one support rod. The scraping device includes a semi-circular guide plate. A scraper is fixedly installed on the edge of the guide plate near the surface of the disc. The blade of the scraper contacts the surface of the disc. A snap-fit ​​bracket is fixedly installed on the outer surface of the middle part of the guide plate. The snap-fit ​​bracket is used to fix the guide plate to the support rod. A reinforcing rib is also provided between the middle part of the support rod and the evaporator body below the support rod. The reinforcing rib can prevent the guide plate and the support rod from shaking.

[0012] The evaporator body is also equipped with a shaft that passes through each support rod. The shaft can rotate freely. A driven wheel that contacts the edge of the disc is fixedly installed on the shaft between the support rods on both sides of each disc. When the disc rotates, it drives the driven wheel to rotate.

[0013] A guide groove is also movably installed on the inner surface of the guide plate. The length of the guide groove is greater than the length of the guide plate. The edge of the guide groove near the scraper is located below the scraper, so that the material scraped off by the scraper can directly enter the guide groove.

[0014] The lower part of the guide plate has a slot, and a roller connected to the guide groove is installed in the slot. A rocker arm is rotatably connected to the roller. The middle part of the rocker arm has a sliding hole. The middle part of the reinforcing rib has a support rod located in the sliding hole. The support rod has a bearing. A cam that cooperates with the rocker arm is also fixedly installed on the shaft above the rocker arm at the reinforcing rib. The cam can rotate with the shaft. A spring is also installed between the top of the guide plate and the top of the guide groove.

[0015] The scraper is further provided with several parallel baffles on its lower surface. The baffles are connected to a swing plate located in the guide trough at their ends. A baffle plate is also fixedly installed on the lower part of the baffles. The baffle plate is located on the left side surface of the baffles, and its end is located on the left side of the swing plate.

[0016] The evaporator box on the front side of the feeding area is also equipped with an observation window and a maintenance port.

[0017] Compared with the prior art, the implementation effects of the present invention are as follows:

[0018] 1. The evaporator is driven by a motor to rotate the main shaft, which in turn causes the disc to rotate continuously. This allows the high-concentration mother liquor sprayed onto the disc by the distributor to be distributed on the surface of the disc as it rotates. At the same time, under the drying effect of the hot air flow, the non-volatile components in the high-concentration mother liquor are dried and solidified on the surface of the disc. Then, after being scraped off by a scraper, the liquor enters the auger from the feeding area, thus realizing the evaporation and drying of the high-concentration mother liquor and achieving integrated processing.

[0019] 2. The evaporator is equipped with a heat exchanger at the top, which allows the hot steam flowing out from the top of the evaporator to be condensed, facilitating the liquefaction and collection of the steam. At the same time, the heat in the heat exchanger can be used to heat the airflow entering the evaporator, realizing the recovery and utilization of heat.

[0020] 3. The evaporator is equipped with a driven wheel that cooperates with the disc. Driven by the disc, the driven wheel drives the cam to rotate. During the rotation of the cam, it can press down the rocker arm, causing the rocker arm to move the guide chute within the guide plate. After the cam disengages from the rocker arm, the spring pulls the guide chute back to its original position. This achieves continuous up-and-down movement of the guide chute during the rotation of the cam, which shakes the material in the guide chute, facilitates the downward sliding of the material in the guide chute, and prevents the accumulation of material in the guide chute.

[0021] 4. The swing plate installed inside the guide chute can intercept the material accumulated in the guide chute during the upward movement of the guide chute, preventing the material from moving upward with the guide chute. During the downward movement of the guide chute, the swing plate can swing in the direction of the guide chute's movement, causing the material in the guide chute to move downward with the guide chute, thereby clearing the material in the guide chute. Attached Figure Description

[0022] Figure 1 This is a front view of the evaporator of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the partition of the present invention installed inside the evaporator box;

[0024] Figure 3 This is a schematic diagram of the installation of the discharge auger of the present invention;

[0025] Figure 4 This is a schematic diagram of the installation of the scraping device of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the scraper device and the disc working together;

[0027] Figure 6 This is a schematic diagram of the scraping device of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection between the scraper and the guide plate of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection between the swing plate and the baffle of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1. Evaporator body; 11. Observation window; 12. Inspection port; 13. Support frame; 14. Baffle plate; 15. Divider section; 16. Inlet pipe; 17. Drain pipe; 20. Mounting frame; 21. Motor; 22. Reducer; 23. Driven pulley; 24. Bearing housing; 25. Main shaft; 26. Disc; 3. Discharge auger; 32. Auger shaft; 32. Discharge port; 4. Heat exchanger; 41. Exhaust pipe ; 42. Drain outlet; 5. Liquid inlet pipe; 51. Liquid distribution pipe; 6. Driven wheel; 60. Shaft; 61. Support rod; 611. Reinforcing rib; 612. Support rod; 62. Cam; 63. Guide plate; 631. Groove; 632. Roller; 64. Swing rod; 65. Guide chute; 651. Cover plate; 66. Blade; 67. Spring; 68. Snap-fit ​​bracket; 661. Baffle; 662. Swing plate; 663. Baffle plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] like Figure 1-2 As shown, the integrated evaporator of the present invention for high-concentration mother liquor includes an evaporation chamber 1. A heat exchanger 4 is installed on the top of the evaporation chamber 1. The top of the evaporation chamber 1 is connected to the heat exchanger 4 through an exhaust pipe 41. A partition 14 is installed in the middle of the evaporation chamber 1 and is connected to the inner surfaces of the two sides and the rear side of the evaporation chamber 1. The partition 14 divides the evaporation chamber 1 into an evaporation zone and a receiving zone. The partition 14 near the front of the evaporation chamber 1 is an upwardly inclined dividing part 15. A feeding zone is formed between the dividing part 15 and the front side of the evaporation chamber 1. The evaporation zone and the receiving zone are connected through the feeding zone. An observation window 11 and a maintenance port 12 are also provided on the evaporation chamber 1 in front of the feeding zone to facilitate observation of the evaporator's operating status and maintenance.

[0035] like Figure 2As shown, a main shaft 25 is mounted on the evaporator housing 1 in the evaporation zone. A support frame 13 is provided on each side of the evaporator housing 1, and a bearing seat 24 is mounted on each support frame 13. Both ends of the main shaft 25 are respectively installed in the bearing seats 24. The main shaft 25 is connected to the evaporator housing 1 via sealed bearings, allowing the main shaft 25 to rotate freely on the evaporator housing 1. A drive device is connected to the right end of the main shaft 25. The drive device includes a motor 21, a reducer 22, a driving pulley, and a driven pulley 23. The motor 21 is connected to the reducer 22 for transmission. The driving pulley is installed on the shaft of the reducer 22, and the driven pulley 23 is installed on the right end of the main shaft 25. The driving pulley and the driven pulley 23 are connected by a transmission belt. The motor 21 is powered by an external power supply and is mounted on the mounting bracket 20. The evaporator body 1 above the partition 14 is also equipped with a liquid inlet pipe 5, an air inlet pipe 16 and a liquid outlet pipe 17. The liquid inlet pipe 5 is used to introduce high-concentration mother liquor, and the air inlet pipe 16 is used to introduce high-temperature gas.

[0036] The main shaft 25 inside the evaporator 1 is equipped with several parallel discs 26. The discs 26 rotate clockwise. Each disc 26 has a liquid distributor on each of its two sides. The liquid distributor is a pipe-type liquid distribution pipe 51 that is not easily blocked by high-concentration mother liquor. The top of the liquid distribution pipe 51 is located on the upper part of the disc 26 below the main shaft 25, and the top of the liquid distribution pipe 51 is inclined downward toward the disc 26 so that the high-concentration mother liquor entering the liquid distribution pipe 51 from the liquid inlet pipe 5 can be sprayed onto the surface of the disc 26. During the rotation of the disc 26, the high-concentration mother liquor on the surface of the disc 26 can be dried by high-temperature gas; and the high-concentration mother liquor dripping from the disc 26 can be discharged from the drain pipe 17.

[0037] A scraping device is provided on the surface of the disc 26, corresponding to the liquid distributor. The scraping device is located on the right side of the disc 26 of the main shaft 25. The scraping device is inclined on the surface of the disc 26 via a transmission frame mounted on the evaporation chamber 1, and the lower end of the scraping device is located above the feeding area. The liquid distribution pipe 51 is located on the left side of the partition 15. The liquid distributor is connected to the liquid inlet pipe 5. High-concentration mother liquor enters the liquid distributor from the liquid inlet pipe 5. The air inlet pipe 16 introduces a 150°C airflow into the evaporation area. The airflow temperature can be selected within the range of 60-180°C depending on the situation. The high-concentration mother liquor is sprayed onto the disc 26, and the high-concentration mother liquor on the disc 26 is heated and evaporated by the hot airflow to form steam. The dried high-concentration mother liquor is scraped off by the scraping device and enters the feeding area from the end of the scraping device. Figure 3 As shown, a discharge auger 3 is provided in the receiving area below the feeding area. Under the conveying action of the auger shaft 32, the discharge auger 3 sends the material in the receiving area out of the evaporator box 1 from the discharge port 32.

[0038] Steam inside the evaporator 1 enters the heat exchanger 4 through the exhaust pipe 41, where it is condensed and liquefied, and then discharged from the heat exchanger 4 through the drain port 42.

[0039] like Figure 4-6 As shown, the transmission frame includes several support rods 61 mounted on the evaporator. Each scraping device corresponds to one support rod 61. The scraping device includes a semi-circular guide plate 63. A scraper is fixedly mounted on the edge of the guide plate 63 near the surface of the disc 26. The blade 66 of the scraper contacts the surface of the disc 26. A snap-fit ​​bracket 68 is fixedly mounted on the outer surface of the middle part of the guide plate 63. The snap-fit ​​bracket 68 is used to fix the guide plate 63 to the support rod 61. A reinforcing rib 611 is also provided between the middle part of the support rod 61 and the evaporator body 1 below the support rod 61. The reinforcing rib 611 can prevent the guide plate 63 and the support rod 61 from shaking.

[0040] The evaporator housing 1 is also equipped with a shaft 60 passing through each support rod 61. The shaft 60 can rotate freely. A driven wheel 6 is fixedly installed on the shaft 60 between the support rods 61 on both sides of each disc 26, which contacts the edge of the disc 26. When the disc 26 rotates, it drives the driven wheel 6 to rotate. A guide trough 65 is also movably installed on the inner surface of the guide plate 63. The length of the guide trough 65 is greater than the length of the guide plate 63. The top of the guide trough 65 is closed by a cover plate 651 to prevent material from spilling from the top of the guide trough 65. The edge of the guide trough 65 near the scraper is located below the scraper, so that the material scraped off by the scraper can directly enter the scraper. The material is fed into the guide trough 65. The lower part of the guide plate 63 has a slot 631, and a roller 632 connected to the guide trough 65 is installed in the slot 631. The end of the roller 632 is rotatably connected to a rocker arm 64. The middle part of the rocker arm 64 has a sliding hole. The middle part of the reinforcing rib 611 has a support rod 612 located in the sliding hole. The support rod 612 has a bearing, which allows the support rod 612 to slide freely in the sliding hole. A cam 62 that cooperates with the rocker arm 64 is also fixedly installed on the shaft 60 above the rocker arm 64 at the reinforcing rib 611. The cam 62 can rotate with the shaft 60. A spring 67 is also installed between the top of the guide plate 63 and the top of the guide trough 65. During the rotation of the disc 26, the disc 26 drives the driven wheel 6 to rotate the shaft 60. During the rotation of the shaft 60, the cam 62 rotates accordingly. During the rotation of the cam 62, it intermittently presses down the rocker arm 64, causing the end of the rocker arm 64 to drive the guide trough 65 to slide relative to the guide plate 63. This allows the material in the guide trough 65 to slide down with vibration. The spring 67 is used to reset the guide trough 65 in the guide plate 63, so as to realize the continuous sliding of the guide trough 65.

[0041] like Figure 6-8As shown, several parallel baffles 661 are also installed on the lower surface of the scraper. The ends of the baffles 661 are connected to a swing plate 662 located within the guide trough 65. A baffle 663 is also fixedly installed on the lower part of the baffles 661, located on the left side surface of the baffles 661, with its end positioned to the left of the swing plate 662. The swing plate 662 can intercept the material accumulated in the guide trough 65 during its upward movement, preventing the material from moving upward with the guide trough 65. During the downward movement of the guide trough 65, the swing plate 662 can swing in the direction of the guide trough 65's movement, causing the material in the guide trough 65 to move downward with the guide trough 65, thus clearing the material from the guide trough 65.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated evaporator for high concentration mother liquor comprising an evaporator box, characterized in that: The top of the evaporation box body is provided with a heat exchanger, the top of the evaporation box body is connected with the heat exchanger through an exhaust pipe, the middle of the evaporation box body is provided with a partition plate connected with the inner surfaces of the two sides and the rear side of the evaporation box body, the partition plate divides the evaporation box body into an evaporation area and a material collecting area, the partition plate near the front of the evaporation box body is a partition part arranged in an upward inclination, a discharging area is formed between the partition part and the front side of the evaporation box body, and the evaporation area and the material collecting area are communicated through the discharging area; A main shaft is arranged on the evaporation box body of the evaporation area, a driving device is connected to the main shaft, a plurality of parallel discs are arranged on the main shaft in the evaporation area, the discs rotate clockwise, a liquid distributor is arranged on the surface of each disc, a scraping device corresponding to the liquid distributor is arranged on the surface of the disc, the scraping device is arranged on the surface of the disc through a transmission frame arranged on the front of the evaporation box body, the lower end of the scraping device is located above the discharging area, a liquid inlet pipe, a liquid outlet pipe and an air inlet pipe are arranged on the evaporation box body above the partition plate, the liquid distributor is connected with the liquid inlet pipe, high-concentration mother liquor enters the liquid distributor from the liquid inlet pipe, the air inlet pipe introduces a gas flow with a temperature of 60-180 DEG C into the evaporation area, the high-concentration mother liquor is sprayed on the disc, and the high-concentration mother liquor on the disc is heated and evaporated by the hot gas flow to form steam; A discharging auger is arranged in the material collecting area below the discharging area, the discharging auger sends the material in the material collecting area out of the evaporation box body, the steam is sent into the heat exchanger through the exhaust pipe on the top of the evaporation box body, the steam is condensed and liquefied, and then is discharged from the heat exchanger; The transmission frame comprises a plurality of support rods arranged on the front of the evaporation box body, each scraping device corresponds to a support rod, the scraping device comprises a semicircular guide plate, a scraper is fixedly arranged on the edge of the guide plate close to the surface of the disc, the cutting edge of the scraper is in contact with the surface of the disc, a clamping frame is fixedly arranged on the outer surface of the middle of the guide plate, the clamping frame is used for fixing the guide plate on the support rod, and a reinforcing rib is further arranged between the middle of the support rod and the evaporation box body below the support rod; A shaft rod penetrating each support rod is further arranged on the evaporation box body, the shaft rod is freely rotatable, a driven wheel in contact with the edge of the disc is fixedly arranged on the shaft rod between the support rods on the two sides of each disc, and the disc drives the driven wheel to rotate when rotating; A guide groove is further movably arranged on the inner surface of the guide plate, the length of the guide groove is greater than the length of the guide plate, and the edge of the guide groove close to the scraper is located below the scraper; A groove is arranged in the lower part of the guide plate, a roller shaft connected with the guide groove is arranged in the groove, a swing rod is rotatably connected to the roller shaft, a sliding hole is arranged in the middle of the swing rod, a support rod located in the sliding hole is arranged in the middle of the reinforcing rib, a bearing is arranged on the support rod, a cam cooperating with the swing rod is further fixedly arranged on the shaft rod above the swing rod at the reinforcing rib, and the cam can rotate with the shaft rod; a spring is further arranged between the top of the guide plate and the top of the guide groove. A plurality of parallel baffles are also installed on the lower surface of the scraper, the ends of the baffles are connected with a swing plate located in the material guide groove, and a baffle piece is fixedly installed on the lower part of the baffle and located on the left surface of the baffle, and the end of the baffle piece is located on the left side of the swing plate.

2. The integrated evaporator for high concentration mother liquor according to claim 1, characterized in that: Two support frames are arranged on the two sides of the evaporation box body, and a bearing seat is installed on each support frame, the two ends of the main shaft are installed in the bearing seats, and the main shaft is connected with the evaporation box body through a sealing bearing, so that the main shaft can freely rotate on the evaporation box body. The driving device comprises a motor, a speed reducer, a driving pulley and a driven pulley, the motor is in transmission connection with the speed reducer, the driving pulley is installed on the rotating shaft of the speed reducer, the driven pulley is installed on the right end of the main shaft, the driving pulley and the driven pulley are in transmission connection through a transmission belt, and the motor is powered by an external power supply.

3. The integrated evaporator for high concentration mother liquor according to claim 1, characterized in that: The liquid distributor is a liquid distribution pipe, the top end of the liquid distribution pipe is located on the upper part of the disc below the main shaft, and the top end of the liquid distribution pipe is inclined downward towards the disc.

4. The integrated evaporator for high concentration mother liquor according to claim 1, characterized in that: An observation window and an inspection opening are further arranged on the evaporation box body on the front side of the discharging area.

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