Evaporative crystallization device for desalting high-salt-content industrial wastewater

Abstract

The utility model discloses an evaporative crystallization device for desalting high-salt-content industrial wastewater. The evaporative crystallization device comprises a distillation device, a spiral separation device and a condensing device which are connected in sequence, and a heating device sleeved outside the distillation device. The distillation device comprises a distillation cavity and a stirring device arranged in the distillation cavity, one end of the stirring device extends out of the distillation cavity and is connected with a driving device, and the outer end face of the stirring device is close to the inner wall of the distillation cavity. The spiral separation device and the condensation device are located above the distillation device, the heating device is arranged outside the distillation device in a sleeving mode, the structure is compact, and the temporary use space is small. The distillation cavity is heated in a steam heating mode, the stirring device in the distillation cavity is driven by the driving device to rotate, stirring of waste water in the distillation cavity is achieved, it is guaranteed that the waste water is evenly heated, meanwhile, salt is prevented from being attached to the inner wall of the distillation cavity, heating is affected, and it is avoided that cleaning is difficult in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and more specifically to an evaporation crystallization device for desalting high-salt industrial wastewater. Background Art

[0002] High-salinity industrial wastewater refers to wastewater generated during industrial production processes and containing high concentrations of salt. This type of wastewater typically originates from industries such as chemical, pharmaceutical, food processing, mining, and petroleum refining. This wastewater contains large amounts of dissolved salts (such as sodium chloride and sodium sulfate), with salt concentrations far higher than those found in general sewage. High salt concentrations pose a serious threat to aquatic ecosystems, degrading water quality and impacting biological survival. Traditional wastewater treatment methods are ineffective for high-salinity wastewater, and salt removal is currently primarily achieved through methods such as evaporation, crystallization, and reverse osmosis.

[0003] When desalinating industrial wastewater through evaporation and crystallization, the main steps are heating the wastewater to its boiling point, using the heat to evaporate the water, and then cooling and crystallizing it. During the evaporation and crystallization step, salt easily adheres to the inner wall of the pipe, affecting the heating effect and also causing uneven heating. Furthermore, most existing solutions are poorly designed, resulting in bulky equipment and space-consuming operations. Utility Model Content

[0004] The purpose of the utility model is to provide an evaporation crystallization device for desalting high-salt industrial wastewater, so as to solve the technical problems existing in the above-mentioned background technology.

[0005] The utility model provides an evaporation crystallization device for desalting high-salt industrial wastewater, comprising a distillation device, a spiral separation device and a condensation device connected in sequence, and a heating device sleeved outside the distillation device;

[0006] The distillation device includes a distillation cavity and a stirring device arranged in the distillation cavity, one end of the stirring device extends out of the distillation cavity and is connected to a driving device, and the outer end surface of the stirring device is close to the inner wall of the distillation cavity; the heating device is arranged in a wrapped shape outside the distillation device, and a dispersion pipe for dispersing steam is provided inside the heating device.

[0007] In a preferred embodiment, the stirring device includes a stirring shaft and a plurality of stirring members evenly distributed around the stirring shaft, the horizontal distance between two adjacent stirring members is less than 1 cm, and the angle between two adjacent stirring members is 120°.

[0008] In a preferred embodiment, the stirring member includes a support rod, a stirring plate arranged on the support rod and an arc scraper located at the end of the stirring plate. The distillation chamber is cylindrical, and the curvature of the arc scraper is adapted to the curvature of the inner wall of the distillation chamber.

[0009] In a preferred embodiment, the stirring plate is evenly provided with flow grooves.

[0010] In a preferred embodiment, a roller is embedded in the arc-shaped scraper, and the roller protrudes from the arc-shaped scraper, and the protruding length is 0.3-0.5 mm.

[0011] In a preferred embodiment, the driving device includes a driving wheel, a driven wheel, a transmission belt, a driving motor and a tensioning wheel, the driving wheel is connected to the output shaft of the driving motor, the driven wheel is connected to the stirring shaft, and the tensioning wheel is located outside the transmission belt and is in pressure contact with the transmission belt.

[0012] In a preferred embodiment, the heating device includes a heating cavity, and air inlets are evenly distributed on the periphery of the heating cavity and are connected one-to-one with the dispersion tubes. Exhaust holes are evenly arranged on the dispersion tubes, and the length of the dispersion tubes is adapted to the length of the heating cavity.

[0013] The beneficial effects of the technical solution of this utility model are:

[0014] This device features a spiral separation unit and condensing unit located above the distillation unit, while the heating unit is housed outside the unit, resulting in a compact structure and minimal temporary space. The distillation chamber is heated using steam, while the stirring unit within the chamber rotates under the drive mechanism, stirring the wastewater within the chamber and ensuring uniform heating. This prevents salt from adhering to the inner walls of the chamber, potentially affecting heating and making cleaning difficult later. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This is an overall schematic diagram of the driving device and distillation device of the utility model.

[0017] Figure 3 This is a schematic diagram of the interior of the distillation device of the utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the stirring element of the utility model.

[0019] Figure 5 This is a side view of the interior of the heating cavity of the present invention.

[0020] Explanation of the accompanying reference numerals: 1 distillation apparatus, 11 distillation chamber, 12 stirring member, 121 support rod, 122 stirring plate, 123 curved scraper, 124 flow trough, 125 roller, 13 stirring shaft, 2 driving device, 21 driving wheel, 22 driven wheel, 23 transmission belt, 24 driving motor, 25 tensioning wheel, 3 heating chamber, 4 air inlet, 5 dispersion pipe, 6 spiral separation device, 7 condensation device. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and convenience of description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Numerous modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0022] like Figure 1-5 As shown, the technical solution of the present invention provides an evaporation and crystallization device for desalting high-salt industrial wastewater, comprising a distillation device 1, a spiral separation device 6, and a condensation device 7, which are sequentially connected and arranged, and a heating device mounted outside the distillation device 1. The distillation device 1 is in a vacuum negative pressure state, with a negative pressure state between -90kPa and -95kPa. Wastewater enters the distillation kettle under the negative pressure for distillation. The heating device heats the distillation device 1, causing the wastewater to boil. The steam generated by the boiling enters the spiral separation device 6 to separate impurities. The clean steam enters the condensation device 7, condenses, and flows out. The above process is repeated, and the salt in the distillation device is continuously concentrated and solidified, and is discharged after meeting the emission standards. The spiral separation device 6 and condensation device 7 of this device are located above the distillation device 1, and the heating device is mounted outside the distillation device 1. The structure is compact and the temporary space is small.

[0023] The distillation device 1 includes a distillation cavity 11 and a stirring device arranged in the distillation cavity 11, one end of the stirring device extends out of the distillation cavity 11 and is connected to a driving device 2, and the outer end face of the stirring device is close to the inner wall of the distillation cavity 11; the heating device is arranged in a wrapped shape outside the distillation device 1, and a dispersion pipe 5 for dispersing steam is arranged inside the heating device.

[0024] The distillation chamber 11 is heated by steam heating, and the stirring device in the distillation chamber 11 is driven by the driving device 2 to rotate, so as to stir the wastewater in the distillation chamber 11 and ensure that the wastewater is heated evenly. At the same time, it prevents salt from adhering to the inner wall of the distillation chamber 11, affecting heating, and avoiding difficulty in cleaning later.

[0025] The stirring device includes a stirring shaft 13 and a plurality of stirring elements 12 evenly distributed around the stirring shaft 13. The horizontal distance between adjacent stirring elements 12 is less than 1 cm, and the angle between adjacent stirring elements 12 is 120°. The stirring elements 12 are closely spaced to avoid dead corners within the distillation chamber 11, allowing residual solids to be scraped away from all areas. The 120° angle between the stirring elements 12 ensures uniform force on the stirring shaft 13 and stable rotation.

[0026] The stirring member 12 includes a support rod 121, a stirring plate 122 provided on the support rod 121, and an arc-shaped scraper 123 located at the end of the stirring plate 122. The distillation chamber 11 is cylindrical, and the curvature of the arc-shaped scraper 123 is adapted to the curvature of the inner wall of the distillation chamber 11. The stirring plate 122 realizes the stirring function, disturbs the water flow, and heats the wastewater evenly. The stirring plate 122 is evenly provided with flow grooves 124, which have less resistance. The arc-shaped scraper 123 is embedded with a roller 125. The roller 125 protrudes from the arc-shaped scraper 123, and the length of the protrusion is 0.3-0.5mm. The roller 125 is in contact with the inside of the distillation chamber 11, can roll, and slightly protrudes from the arc-shaped scraper 123, ensuring the movement stability of the arc-shaped scraper 123 while not affecting the use effect of the arc-shaped scraper 123.

[0027] The driving device 2 includes a driving wheel 21, a driven wheel 22, a transmission belt 23, a driving motor 24, and a tensioning wheel 25. The driving wheel 21 is connected to the output shaft of the driving motor 24, the driven wheel 22 is connected to the stirring shaft 13, and the tensioning wheel 25 is located outside the transmission belt 23 and is in pressure contact with the transmission belt 23. The driving device 2 is actuated to rotate the stirring shaft 13.

[0028] The heating device includes a heating chamber 3, with air inlets 4 evenly distributed around the periphery of the heating chamber 3, each connected to a dispersion tube 5. Exhaust holes are evenly arranged on the dispersion tube 5, and the length of the dispersion tube 5 matches the length of the heating chamber 3. The air inlets 4 are connected to a steam generator, which introduces hot steam into the heating chamber 3 through the air inlet 4. After entering the heating chamber 3, the steam enters the dispersion tube 5 and is evenly dispersed within the heating chamber 3 through the exhaust holes on the dispersion tube 5, further ensuring uniform heating of the wastewater within the distillation chamber 11.

[0029] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. An evaporation crystallization device for desalting high-salt industrial wastewater, characterized by: It includes a distillation device, a spiral separation device and a condensation device which are connected in sequence, and a heating device which is sleeved outside the distillation device; The distillation device includes a distillation cavity and a stirring device arranged in the distillation cavity, one end of the stirring device extends out of the distillation cavity and is connected to a driving device, and the outer end surface of the stirring device is close to the inner wall of the distillation cavity; the heating device is arranged in a wrapped shape outside the distillation device, and a dispersion pipe for dispersing steam is provided inside the heating device.

2. The evaporation crystallization device for desalination of high-salt industrial wastewater according to claim 1, characterized in that: The stirring device includes a stirring shaft and a plurality of stirring members evenly distributed on the periphery of the stirring shaft. The horizontal distance between two adjacent stirring members is less than 1 cm, and the angle between two adjacent stirring members is 120°.

3. The evaporation crystallization device for desalting high-salt industrial wastewater according to claim 2, characterized in that: The stirring member includes a support rod, a stirring plate arranged on the support rod and an arc-shaped scraper located at the end of the stirring plate. The distillation cavity is cylindrical, and the curvature of the arc-shaped scraper is adapted to the curvature of the inner wall of the distillation cavity.

4. The evaporation crystallization device for desalting high-salt industrial wastewater according to claim 3, characterized in that: The stirring plate is evenly provided with flow grooves.

5. The evaporation crystallization device for desalination of high-salt industrial wastewater according to claim 3, characterized in that: A roller is embedded in the arc-shaped scraper, and the roller protrudes from the arc-shaped scraper, with a protruding length of 0.3-0.5 mm.

6. The evaporation crystallization device for desalting high-salt industrial wastewater according to claim 2, characterized in that: The driving device includes a driving wheel, a driven wheel, a transmission belt, a driving motor and a tensioning wheel. The driving wheel is connected to the output shaft of the driving motor, the driven wheel is connected to the stirring shaft, and the tensioning wheel is located outside the transmission belt and is in pressure contact with the transmission belt.

7. The evaporation crystallization device for desalting high-salt industrial wastewater according to claim 1, characterized in that: The heating device includes a heating cavity, and air inlets are evenly distributed on the periphery of the heating cavity and are connected to the dispersion pipes in a one-to-one correspondence. Exhaust holes are evenly arranged on the dispersion pipes, and the length of the dispersion pipes is adapted to the length of the heating cavity.

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