An evaporation and crystallization device for high-salt organic wastewater

Abstract

This utility model discloses an evaporation and crystallization device for high-salt organic wastewater, relating to the field of wastewater treatment technology. It includes a base, with an evaporation and crystallization unit on top of the base. The evaporation and crystallization unit includes a crystallization tank, with a condenser on top of the crystallization tank. An agitation unit is located inside the crystallization tank, comprising two corresponding rotating seats rotatably mounted at both ends of the crystallization tank. A hollow shaft movably passes between the two rotating seats, with a sliding connection between the outer wall of the hollow shaft and the inner wall of the rotating seats. Symmetrically arranged blades are mounted on the hollow shaft, and both blades are rotatably connected to the hollow shaft via mounting shafts that penetrate the outer wall of the hollow shaft. A secondary bevel gear is provided at one opposite end of each mounting shaft. This utility model facilitates cleaning of the inner wall of the crystallization container and ensures uniform heating of the wastewater, improving wastewater evaporation efficiency and thus reducing energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an evaporation and crystallization device for high-salt organic wastewater. Background Technology

[0002] Large quantities of high-salt organic wastewater are generated during industrial production processes such as chemical, pharmaceutical, coal chemical, food processing, and printing and dyeing. This type of wastewater not only has extremely high salt content (typically exceeding 10,000 mg / L, with some industries even reaching over 20%), but also contains recalcitrant organic pollutants such as benzene, phenols, and heterocyclic compounds. Direct discharge of such wastewater can disrupt the ecological balance of aquatic bodies, lead to soil salinization, and threaten crop growth and the safety of drinking water for humans. Therefore, it must undergo advanced treatment to achieve compliant discharge or resource recovery.

[0003] Chinese Patent Application No. 202321178381.3 discloses a high-salt wastewater evaporation and crystallization device, relating to the field of high-salt wastewater treatment. The device includes a main body with a first discharge pipe fixedly connected to its front. A processing tank is fixedly connected to the center of the inner cavity of the main body, and a mounting flange is fixedly connected to the center of the top of the processing tank. A filter plate is fixedly connected to the top of the mounting flange. A cooling water tank is fixedly connected to the bottom right side of the main body. A heating wire is fixedly connected to the inner wall of the reaction tank. Limiting columns are symmetrically fixedly connected around the outer wall of the reaction tank. A scraper is fixedly connected to one end of the stirring column. A second servo motor is fixedly connected to the bottom of the reaction tank, and a base is fixedly connected to the bottom of the second servo motor. A vibration motor is fixedly connected to the center of the inner cavity of the base. However, after use, crystals adhere to the inner wall of the crystallization container, making cleaning and discharge inconvenient.

[0004] In addition, heating wastewater can lead to uneven heating, affecting the evaporation efficiency of the wastewater and resulting in increased energy consumption. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-salt organic wastewater evaporation and crystallization device, which facilitates the cleaning of the inner wall of the crystallization container, makes the wastewater uniformly heated, improves the wastewater evaporation efficiency, reduces energy consumption, and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an evaporation and crystallization device for high-salt organic wastewater, comprising a base, an evaporation and crystallization unit on the top of the base, the evaporation and crystallization unit comprising a crystallization tank, and a condenser on the top of the crystallization tank;

[0007] The crystallization tank is equipped with an agitation unit, which includes two corresponding rotating seats. The two rotating seats are rotatably embedded at both ends of the crystallization tank, and a hollow shaft is movably connected between the two rotating seats. The outer wall of the hollow shaft is slidably connected to the inner wall of the rotating seat. Blades are symmetrically arranged on the hollow shaft. Both blades are rotatably connected to the hollow shaft through mounting shafts. The mounting shafts pass through the outer wall of the hollow shafts, and a secondary bevel gear is provided at one end of each of the two mounting shafts.

[0008] The hollow shaft is rotatably connected to a rotating shaft, and the end of the rotating shaft is provided with a main bevel gear. The two sides of the main bevel gear mesh with the sides of the two auxiliary bevel gears respectively.

[0009] Furthermore, one end of the crystallization tank is provided with a water inlet pipe and an air outlet at the top and bottom, respectively. Both the water inlet pipe and the air outlet are provided with sealing caps. The other end of the crystallization tank is provided with a gas guide pipe at the top, and a gas venting pipe is provided at the top of the gas guide pipe. The end of the gas venting pipe is connected to the top of the condenser. The bottom of the end of the condenser away from the gas venting pipe is provided with a drain pipe.

[0010] Furthermore, a heating assembly is provided at the bottom of the outer side of the crystallization tank. The heating assembly includes a heating chamber located at the bottom of the crystallization tank. An air inlet pipe and an exhaust pipe are respectively provided at two diagonal positions at the top of the heating chamber. Guide plates are staggered inside the heating chamber.

[0011] Furthermore, the other end of the hollow shaft is rotatably connected to an end seat, and an electric telescopic rod is provided between the end seat and the end face of the crystallization tank.

[0012] Furthermore, a drive assembly is provided between the base and the hollow shaft. The drive assembly includes an annular seat and a drive motor. A secondary pulley is rotatably connected to the annular seat, and the inner wall of the secondary pulley is slidably connected to the outer wall of the hollow shaft.

[0013] Furthermore, the drive motor is mounted on the base, and the output shaft of the drive motor is equipped with a main pulley. The main pulley and the auxiliary pulley are connected by a transmission belt.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The blade of this utility model achieves the switching between working state and cleaning state through the transmission of the rotating shaft and the main and auxiliary bevel gears. In the cleaning state, the two semi-circular blades are coplanar to form a disk shape, and the outer wall is closely attached to the inner wall of the crystallization tank. With the help of the electric telescopic rod, the hollow shaft is driven to reciprocate along the axial direction of the crystallization tank. The blade can directly scrape away the crystals and impurities remaining on the tank wall from all directions.

[0016] 2. This utility model utilizes staggered guide plates inside the heating chamber to slow down the flow rate of high-temperature steam, allowing for full heat exchange between the steam and the wastewater inside the crystallizer. This results in more thorough and uniform heating of the high-salt wastewater, reducing energy consumption. Simultaneously, the two blades are arranged in a cross shape during operation. The drive assembly rotates the blades to agitate the wastewater, and the electric telescopic rod drives the blades to reciprocate axially, further breaking up the stratification of the wastewater and ensuring uniform heating of the high-salt wastewater. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0019] Figure 3 This is a schematic cross-sectional view of the present invention.

[0020] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the guide plate structure of this utility model.

[0022] In the diagram: 1. Base; 2. Evaporation and crystallization unit; 201. Crystallization tank; 202. Water inlet pipe; 203. Exhaust port; 204. Gas guide pipe; 205. Gas vent pipe; 206. Condenser; 207. Drain pipe; 3. Heating assembly; 301. Heating chamber; 302. Gas inlet pipe; 303. Exhaust pipe; 304. Guide plate; 4. Stirring unit; 401. Rotating seat; 402. Hollow shaft; 403. Blade; 404. Secondary bevel gear; 405. Rotating shaft; 406. Main bevel gear; 407. End seat; 408. Electric telescopic rod; 5. Drive assembly; 501. Annular seat; 502. Secondary pulley; 503. Drive motor; 504. Main pulley; 505. Transmission belt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5This utility model provides a technical solution: an evaporation and crystallization device for high-salt organic wastewater, including a base 1, with an evaporation and crystallization unit 2 on the top of the base 1. The evaporation and crystallization unit 2 includes a crystallization tank 201, with a condenser 206 on the top of the crystallization tank 201. One end of the crystallization tank 201 has a water inlet pipe 202 and an air outlet 203 on its top and bottom, respectively. Both the water inlet pipe 202 and the air outlet 203 are covered with sealing caps. The other end of the crystallization tank 201 has a gas guide pipe 204 on its top, with an air intake pipe 205 on its top. The end of the air intake pipe 205 is connected to the top of the condenser 206, and the bottom of the end of the condenser 206 away from the air intake pipe 205 has a drain pipe 207.

[0025] Specifically, after the high-salt wastewater is injected into the crystallization tank 201 through the inlet pipe 202, the inlet pipe 202 is sealed. The steam generated after the wastewater is heated passes through the gas guide pipe 204 and the gas vent pipe 205 in sequence and enters the condenser 206. After the steam is condensed, it becomes condensate and is discharged through the drain pipe 207. The condenser 206 is preferably a horizontal shell and tube condenser.

[0026] The crystallization tank 201 is equipped with an agitation unit 4. The agitation unit 4 includes two corresponding rotating seats 401. The two rotating seats 401 are rotatably embedded at both ends of the crystallization tank 201. A hollow shaft 402 is movably connected between the two rotating seats 401. The outer wall of the hollow shaft 402 is slidably connected to the inner wall of the rotating seats 401. Blades 403 are symmetrically arranged on the hollow shaft 402. Both blades 403 are rotatably connected to the hollow shaft 402 through mounting shafts. The mounting shafts pass through the outer wall of the hollow shaft 402. A secondary bevel gear 404 is provided at the opposite end of each of the two mounting shafts.

[0027] The hollow shaft 402 is rotatably connected to a rotating shaft 405. The end of the rotating shaft 405 is provided with a main bevel gear 406. The two sides of the main bevel gear 406 mesh with the sides of two auxiliary bevel gears 404 respectively.

[0028] Specifically, both blades 403 are semi-circular structures. In the initial state, the two blades 403 are completely opposite and coplanar, forming a nearly complete disk-shaped structure. At this time, the outer walls of the two blades 403 are in contact with the inner wall of the crystallization tank 201. By rotating the shaft 405, the main bevel gear 406 is driven to rotate, and the main bevel gear 406 drives the two auxiliary bevel gears 404 to rotate, realizing the opposite rotation of the two blades 403. The two blades 403 rotate in opposite directions, and the rotation angle is less than 90°. At this time, the drive assembly drives the hollow shaft 402 to rotate, realizing the rotation of the two blades 403. The rotation of the blades 403 agitates the wastewater in the crystallization tank 201, making the wastewater heat evenly.

[0029] It should be noted that, since the blade 403 has a certain thickness, in order to facilitate the rotation of the blade 403 while it is in contact with the inner wall of the crystallization tank 201, the circumferential surface of the blade 403 is made of an elastic material.

[0030] The other end of the hollow shaft 402 is rotatably connected to an end seat 407, and an electric telescopic rod 408 is provided between the end seat 407 and the end face of the crystallization tank 201.

[0031] While the wastewater is agitated by the rotation of the blade 403, the extension and retraction of the electric telescopic rod 408 drives the hollow shaft 402 to reciprocate linearly through the end seat 407, thereby realizing the reciprocating linear motion of the blade 403 and further improving the uniformity of wastewater heating.

[0032] After the high-salt wastewater has evaporated and crystallized, the sealing cover of the vent 203 is opened first, and the obtained crystals are discharged through the vent 203. Then, by rotating the shaft 405, the two blades 403 are restored to their initial disc shape. The extension and retraction of the electric telescopic rod 408 drives the blades 403 to reciprocate through the hollow shaft 402. The blades 403 are used to scrape and clean the crystals and other impurities attached to the inner wall of the crystallization tank 201. After scraping, the remaining crystals and impurities are discharged through the vent 203.

[0033] A drive assembly 5 is provided between the base 1 and the hollow shaft 402. The drive assembly 5 includes an annular seat 501 and a drive motor 503. A secondary pulley 502 is rotatably connected to the annular seat 501. The inner wall of the secondary pulley 502 is slidably connected to the outer wall of the hollow shaft 402. The drive motor 503 is located on the base 1. The output shaft of the drive motor 503 is provided with a main pulley 504. The main pulley 504 and the secondary pulley 502 are connected by a transmission belt 505.

[0034] Specifically, the drive motor 503 drives the main pulley 504 to rotate, and drives the auxiliary pulley 502 to rotate through the transmission belt 505. Since the auxiliary pulley 502 and the rotating seat 401 are slidably connected to the hollow shaft 402, the hollow shaft 402 can only slide axially along the auxiliary pulley 502 and the rotating seat 401.

[0035] A heating assembly 3 is provided on the bottom of the outer side of the crystallization tank 201. The heating assembly 3 includes a heating chamber 301, which is located at the bottom of the crystallization tank 201. An air inlet pipe 302 and an exhaust pipe 303 are respectively provided at two diagonal positions on the top of the heating chamber 301. Guide plates 304 are arranged alternately inside the heating chamber 301.

[0036] Specifically, after the high-salt wastewater is injected into the crystallization tank 201, high-temperature steam is injected into the heating chamber 301 through the air inlet pipe 302 and discharged through the exhaust pipe 303, so that the high-temperature steam and the high-salt wastewater in the crystallization tank 201 exchange heat and heat the high-salt wastewater to the specified temperature.

[0037] During the process of high-temperature steam being discharged from the inlet pipe 302 to the exhaust pipe 303, it passes through the staggered guide plates 304 in sequence, thereby slowing down the flow rate of the high-temperature steam and extending the residence time in the heating chamber 301, so that the high temperature of the steam can be fully utilized, thereby achieving the purpose of reducing energy consumption.

[0038] When using, first open the sealing cap of the top water inlet pipe 202 at one end of the crystallization tank 201, and inject the high-salt organic wastewater into the crystallization tank 201 through the water inlet pipe 202. After the injection is completed, close and seal the water inlet pipe 202, and at the same time ensure that the sealing cap of the bottom drain port 203 of the crystallization tank 201 is in a closed state to prevent wastewater leakage or steam overflow.

[0039] Then, the heating component 3 is activated. High-temperature steam is injected into the heating chamber 301 through the air inlet pipe 302 at the top of the heating chamber 301. As the high-temperature steam flows from the air inlet pipe 302 to the exhaust pipe 303, the staggered guide plates 304 inside the heating chamber 301 slow down the steam flow speed and prolong its residence time in the heating chamber 301, so that the steam heat can fully exchange with the wastewater in the crystallization tank 201. After the heat exchange is completed, the low-temperature steam is discharged from the exhaust pipe 303 at the other opposite corner of the heating chamber 301, gradually heating the wastewater to the specified evaporation temperature.

[0040] The steam generated by the heating of wastewater is discharged through the gas guide pipe 204 at the top of the other end of the crystallization tank 201, and then enters the condenser 206 through the gas inlet pipe 205. The steam condenses into liquid condensate after heat exchange with the condensing medium in the condenser 206, and is finally discharged through the drain pipe 207 for recycling.

[0041] To prevent uneven heating of the high-salt wastewater inside the crystallizer 201, the stirring unit 4 and the drive assembly 5 are activated to work together. In the initial state, the two semi-circular blades 403 are completely opposite and coplanar, forming a nearly complete disk shape with their outer walls attached to the inner wall of the crystallizer 201. First, the rotating shaft 405 inside the hollow shaft 402 is rotated, and the main bevel gear 406 at the end of the rotating shaft 405 rotates accordingly. The main bevel gear 406 meshes with the two secondary bevel gears 404, driving the two blades 403 to rotate in opposite directions around the mounting shaft until they cross. The rotation angle is... When the angle is less than 90°, the drive motor 503 on the base 1 is started. The output shaft of the drive motor 503 drives the main pulley 504 to rotate. The main pulley 504 drives the auxiliary pulley 502 on the annular seat 501 to rotate through the transmission belt 505, which in turn drives the hollow shaft 402 and the blade 403 to rotate and stir the wastewater. At the same time, the electric telescopic rod 408 extends and retracts through the end seat 407 to drive the hollow shaft 402 to slide back and forth in a straight line, so that the blade 403 moves back and forth synchronously, further making the wastewater heat evenly and improving the crystallization efficiency.

[0042] After the high-salt wastewater has evaporated and crystallized, the sealing cover of the vent 203 is opened to discharge the crystals through the vent 203. Then, the shaft 405 is rotated again to make the two blades 403 rotate in opposite directions to return to the disk state. The electric telescopic rod 408 is started to drive the blades 403 to reciprocate along the axial direction of the crystallization tank 201 to scrape off the residual crystals and impurities on the inner wall. The residual substances are discharged through the vent 203, completing the cleaning process in preparation for the next treatment.

[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-salt organic wastewater evaporation and crystallization device, comprising a base (1), wherein an evaporation and crystallization unit (2) is provided on the top of the base (1), characterized in that, The evaporation crystallization unit (2) includes a crystallization tank (201), and a condenser (206) is provided on the top of the crystallization tank (201); The crystallization tank (201) is equipped with an agitation unit (4) inside. The agitation unit (4) includes two corresponding rotating seats (401). The two rotating seats (401) are respectively rotatably embedded at both ends of the crystallization tank (201). A hollow shaft (402) is movably passed between the two rotating seats (401). The outer wall of the hollow shaft (402) is slidably connected to the inner wall of the rotating seat (401). Blades (403) are symmetrically arranged on the hollow shaft (402). Both blades (403) are rotatably connected to the hollow shaft (402) through mounting shafts. The mounting shafts pass through the outer wall of the hollow shaft (402). A secondary bevel gear (404) is provided at the opposite end of the two mounting shafts. The hollow shaft (402) is rotatably connected to a rotating shaft (405). The end of the rotating shaft (405) is provided with a main bevel gear (406). The two sides of the main bevel gear (406) respectively mesh with the sides of the two auxiliary bevel gears (404).

2. The high-salt organic wastewater evaporation and crystallization apparatus according to claim 1, characterized in that: The crystallization tank (201) is provided with a water inlet pipe (202) at the top and a drain port (203) at the bottom of one end. Both the water inlet pipe (202) and the drain port (203) are provided with sealing caps. The crystallization tank (201) is provided with a gas guide pipe (204) at the top of the other end. The gas guide pipe (204) is provided with a gas vent pipe (205) at the top. The end of the gas vent pipe (205) is connected to the top of the condenser (206). The condenser (206) is provided with a drain pipe (207) at the bottom of the end away from the gas vent pipe (205).

3. The high-salt organic wastewater evaporation and crystallization device according to claim 1, characterized in that: The crystallization tank (201) is provided with a heating assembly (3) at the bottom of its outer side. The heating assembly (3) includes a heating chamber (301) located at the bottom of the crystallization tank (201). An air inlet pipe (302) and an exhaust pipe (303) are respectively provided at two diagonal positions at the top of the heating chamber (301). Guide plates (304) are interlaced inside the heating chamber (301).

4. The high-salt organic wastewater evaporation and crystallization apparatus according to claim 1, characterized in that: The other end of the hollow shaft (402) is rotatably connected to an end seat (407), and an electric telescopic rod (408) is provided between the end seat (407) and the end face of the crystallizer (201).

5. The high-salt organic wastewater evaporation and crystallization apparatus according to claim 1, characterized in that: A drive assembly (5) is provided between the base (1) and the hollow shaft (402). The drive assembly (5) includes an annular seat (501) and a drive motor (503). A secondary pulley (502) is rotatably connected to the annular seat (501). The inner wall of the secondary pulley (502) is slidably connected to the outer wall of the hollow shaft (402).

6. The high-salt organic wastewater evaporation and crystallization apparatus according to claim 5, characterized in that: The drive motor (503) is mounted on the base (1), and the output shaft of the drive motor (503) is provided with a main pulley (504). The main pulley (504) and the auxiliary pulley (502) are connected by a transmission belt (505).

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