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CN-122006285-A - Centrifugal anti-blocking gas-liquid separation continuous crystallization equipment

CN122006285ACN 122006285 ACN122006285 ACN 122006285ACN-122006285-A

Abstract

The invention relates to the technical field of crystallization equipment, in particular to centrifugal anti-blocking gas-liquid separation continuous crystallization equipment. The technical scheme includes that the device comprises an evaporation crystallization system and a gas-liquid separation system integrated in the gas washing tank. The high-speed rotating centrifugal separation mechanism is adopted to replace the traditional silk screen foam remover, and the centrifugal force is utilized to realize the high-efficiency separation of gas, liquid and solid, thereby fundamentally solving the problem of blockage caused by crystal adhesion. The gas-liquid separation system is provided with a mechanical liquid discharging structure which can be automatically opened and closed and has a self-dredging function, and a differential regulating mechanism which can generate a rotating speed difference to realize online scraping and blockage removal. The invention realizes continuous, efficient and stable purification of the crystal-containing steam, effectively protects key equipment such as a compressor and the like, ensures complete closed-circuit recovery of the mother liquor, has the advantages of strong anti-blocking performance, high separation efficiency and convenient and fast automatic operation and maintenance, and is suitable for the continuous crystallization process of high-difficulty materials such as Bayer process mother liquor and the like.

Inventors

  • ZHOU QIN
  • LI YANG
  • QIN QINGDONG
  • TONG HAI

Assignees

  • 贵州理工学院

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. The centrifugal anti-blocking continuous gas-liquid separation crystallization device is characterized by comprising an evaporation crystallization system (1), wherein the evaporation crystallization system (1) comprises a separation tank (11), an evaporation tank (12) arranged on one side of the separation tank (11) and a gas washing tank (13) fixedly arranged on the separation tank (11); The gas-liquid separation system (2) is arranged in the gas washing tank (13), the gas-liquid separation system (2) comprises a plurality of groups of centrifugal separation mechanisms (21) fixedly arranged in the separation tank (11), the centrifugal separation mechanisms (21) comprise a conical bottom plate (211) and a top plate (212) which are rotatably arranged in the gas washing tank (13), the top plate is positioned above the bottom plate (211), an air passage (213) is formed between the bottom plate (211) and the top plate (212), a liquid collecting chamber (216) is arranged on one side of the air passage (213), and an exhaust groove (215) is formed on one side of the top plate (212) positioned in the liquid collecting chamber (216); A plurality of liquid discharge holes are formed in the liquid collection chamber (216), a liquid discharge structure (22) is arranged on each liquid discharge hole, and the liquid discharge structure (22) controls the opening and closing of the liquid discharge holes according to the liquid amount in the liquid collection chamber (216); a scraper (28) fixedly mounted on the top plate (212) for scraping off the attachments on the bottom plate (211); A rotating shaft (24) rotatably installed inside the gas washing tank (13), wherein the rotating shaft (24) is fixedly connected with the bottom plate (211) through a connecting block (25), the rotating shaft (24) is connected with the top plate (212) through a differential connecting piece (26), and the differential connecting piece (26) controls the tightness between the top plate (212) and the rotating shaft (24); And the driving assembly (27) is arranged on the gas washing tank (13), and the driving assembly (27) drives the rotating shaft (24) to rotate.
  2. 2. A centrifugal anti-clogging continuous crystallization apparatus for gas-liquid separation according to claim 1, wherein a plugging ring (214) is rotatably installed between end surfaces of the bottom plate (211) and the top plate (212), and the liquid discharge holes are circumferentially arranged in an array on the plugging ring (214).
  3. 3. The centrifugal anti-blocking continuous gas-liquid separation crystallization device according to claim 2, wherein the liquid draining structure (22) comprises a mounting cylinder (221) fixedly mounted on the blocking ring (214), a fine hole (2211) and a coarse hole (2212) which are coaxially arranged and communicated with the liquid draining hole are arranged in the mounting cylinder (221), a blocking plug (222) is slidably and plug-mounted in the fine hole (2211), a connecting rod (223) fixedly connected with the blocking plug (222) is slidably mounted on the mounting cylinder (221), and a spring (224) is fixedly mounted between the blocking plug (222) and the mounting cylinder (221); The utility model discloses a gas washing tank, including bottom plate (211), guide rail (225) is fixed mounting on bottom plate (211), slidable mounting has slider (226) on guide rail (225), slider (226) with install connecting rod (227) in the rotation between connecting rod (223), rotatable mounting has rolling element (228) on slider (226), install guide (23) that drive slider (226) slided in gas washing tank (13).
  4. 4. A centrifugal anti-clogging gas-liquid separation continuous crystallization apparatus according to claim 3, characterized in that the plugging plug (222) has a length larger than the fine hole (2211) and penetrates the fine hole (2211).
  5. 5. A centrifugal anti-clogging gas-liquid separation continuous crystallization apparatus according to claim 4, characterized in that said guide member (23) comprises a support plate (231) fixedly mounted inside the gas washing tank (13), a plurality of elliptic guide plates (232) fixedly mounted on the support plate (231).
  6. 6. The centrifugal anti-blocking continuous gas-liquid separation crystallization device according to claim 5, wherein a plurality of notches (251) are formed in the connecting block (25) in a penetrating manner, and an inner ring and an outer ring of the connecting block (25) are fixedly connected with the rotating shaft (24) and the bottom plate (211) respectively.
  7. 7. A centrifugal anti-clogging gas-liquid separation continuous crystallization apparatus as claimed in claim 6, wherein the cross-sectional area of said air discharge groove (215) is larger than the cross-sectional area of said air passage (213), and the cross-sectional area of said air passage (213) is gradually increased from bottom to top.
  8. 8. The centrifugal anti-blocking continuous gas-liquid separation crystallization device according to claim 7, wherein the differential connection piece (26) comprises a liquid tank (261) arranged in a rotating shaft (24), a circulation hole (241) communicated with the liquid tank (261) is arranged in the rotating shaft (24), a plurality of pressure rods (262) are slidably arranged in a door of the liquid tank (261), the pressure rods (262) extend to the outer side of the liquid tank (261) and are fixedly provided with pressure plates (263), and an elastic cover (264) is fixedly arranged between one end of the pressure rods (262) positioned in the liquid tank (261) and the liquid tank (261); The utility model discloses a liquid tank, including ventilation hole (241) and liquid case (261), ventilation hole (241) and liquid case (261) intussuseption are filled with hydraulic medium, the top of pivot (24) rotates and sealing mounting has shutoff pole (265) of ventilation hole (241) shutoff, fixed mounting has connecting plate (266) on shutoff pole (265), fixed mounting has push rod motor (267) on gas wash tank (13), the output shaft of push rod motor (267) with connecting plate (266) fixed connection.
  9. 9. A centrifugal anti-clogging gas-liquid separation continuous crystallization apparatus according to claim 8, characterized in that said drive assembly (27) comprises a motor (271) fixedly mounted on the gas washing tank (13), a transmission belt (272) mounted between the output shaft of the motor (271) and the rotating shaft (24).
  10. 10. The centrifugal anti-blocking continuous gas-liquid separation crystallization device according to claim 9, wherein a liquid return groove (29) is arranged in the gas washing tank (13) and below the liquid discharge structure (22), a liquid return pipe (291) is fixedly arranged on the liquid return groove (29), the other end of the liquid return pipe (291) is communicated with the separation tank (11), a plurality of sawtooth strips (281) are fixedly arranged on the top plate (212), and the sawtooth strips (281) are distributed in a staggered manner.

Description

Centrifugal anti-blocking gas-liquid separation continuous crystallization equipment Technical Field The invention relates to the technical field of crystallization equipment, in particular to centrifugal anti-blocking gas-liquid separation continuous crystallization equipment. Background The ion adsorption resin method is used for recovering gallium or vanadium in the Bayer process circulating mother liquor, and aims to convert high-concentration metal salt solution obtained by resin elution into a high-purity solid crystal product with commercial value. The equipment system is mainly constructed based on the principle of mechanical vapor recompression evaporation crystallization, is a closed-circuit system integrating heat energy circulation and material circulation, and comprises an evaporation tank, a separation tank and a gas washing tank for gas-liquid separation. In the gas-liquid separation link, the silk screen pad demister is a widely applied traditional technology, and has simple structure and higher separation efficiency for clean gas, but when secondary steam generated by the evaporation and crystallization of Bayer process mother liquor is treated, obvious limitation is exposed, and the main problems are concentrated on two aspects of blockage and separation failure; Firstly, the Bayer process mother liquor has complex components, secondary steam generated by evaporation is entrained with fine crystal nuclei rich in sodium, aluminum, silicon and other elements, and when the crystal nuclei flow through the fine holes of the silk screen pad, the crystal nuclei are extremely easy to attach, grow and bridge each other on the surface of silk threads, finally form a hard scale layer, severely block an airflow channel, and cause the pressure drop of a gas washing tank to rise sharply, so that the inlet pressure of a compressor is reduced, and the compressor is forced to deviate from a design working condition, the efficiency is reduced and the energy consumption is increased; second, the separation mechanism of the wire mesh pad relies on the droplets to coalesce and drip after impinging on the wire. However, when the vapor flow rate is high or the screen structure is not designed properly, the captured droplets may be torn again by the high-speed air flow and broken into smaller-sized and larger-number fine droplets, and the new droplets are more difficult to capture, so that the new droplets penetrate through the screen pad and are carried into the compressor and the subsequent processes, which not only reduces the gas-liquid separation efficiency, but also causes the reduction of the vapor purity, further causes the intangible loss of the target metal product, and may damage the impeller due to the high-speed impact of the droplets in the compressor. Disclosure of Invention The invention aims to solve the problems in the background art and provides a centrifugal anti-blocking continuous gas-liquid separation crystallization device which is resistant to secondary entrainment and easy to maintain and is used for efficient gas-liquid separation. The technical scheme of the invention is that the centrifugal anti-blocking continuous gas-liquid separation crystallization equipment comprises an evaporation crystallization system, wherein the evaporation crystallization system comprises a separation tank, an evaporation tank arranged on one side of the separation tank and a gas washing tank fixedly arranged on the separation tank; The gas-liquid separation system is arranged in the gas washing tank and comprises a plurality of groups of centrifugal separation mechanisms fixedly arranged in the separation tank, the centrifugal separation mechanisms comprise conical bottom plates and top plates, the conical bottom plates are rotatably arranged in the gas washing tank, the top plates are positioned above the bottom plates, an air passage is formed between the bottom plates and the top plates, a liquid collecting chamber is arranged on one side of the air passage, and an exhaust groove is formed on one side of the top plate, which is positioned in the liquid collecting chamber; The liquid collecting chamber is internally provided with a plurality of liquid discharging holes, a liquid discharging structure is arranged on the liquid discharging holes, and the liquid discharging structure controls the opening and closing of the liquid discharging holes according to the liquid amount in the liquid collecting chamber; a scraper fixedly arranged on the top plate and used for scraping attachments on the bottom plate; The rotating shaft is rotatably arranged in the gas washing tank and fixedly connected with the bottom plate through a connecting block, the rotating shaft is connected with the top plate through a differential connecting piece, and the differential connecting piece controls the tightness between the top plate and the rotating shaft; And the driving assembly is arranged on the gas washing tank and drive