Scraper evaporation device

Abstract

The utility model relates to the technical field of industrial wastewater treatment, in particular to a scraper evaporation device which comprises an evaporator, a condenser and a gas-liquid separator which are sequentially connected in series, and further comprises a vacuum pump, a driving mechanism and a control mechanism, a scraping mechanism is arranged in the evaporator and comprises a driving shaft, a plurality of fixing pieces, a scraping plate and a spiral pushing piece, and the driving shaft extends in the axial direction of the evaporator and is connected with a driving mechanism; the fixing pieces are sequentially arranged on the driving shaft in a sleeving mode, the ends of the fixing pieces are sequentially connected through the transverse connecting pieces, the scraping plates are vertically arranged on the transverse connecting pieces, and the spiral pushing pieces are fixedly connected with the driving shaft. The scraper evaporation device can realize efficient evaporation and separation of salt-containing wastewater, reduce frictional resistance caused by crystals in the evaporator, improve the working efficiency, improve the driving force of the scraping mechanism and reduce the energy loss.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a scraper evaporation device. Background Art

[0002] A large amount of saline wastewater is generated during the chemical production process, but saline wastewater cannot be directly treated in the biochemical treatment pool. Excessive salt content in the wastewater will cause the death of microorganisms. In order to allow the wastewater to be biochemically treated, the salt in the wastewater must be separated and treated. At present, scraper evaporators are often used for distillation treatment to precipitate crystals. The scraper slides in the salt solution to separate the salt crystals from the solution.

[0003] However, the existing scraper evaporator has the problems of large friction and high energy consumption. When encountering a solution with high salt content, the scraper of the existing scraper evaporator wears too quickly, and replacing the scraper requires professional operation, which is labor-intensive.

[0004] Therefore, it is urgent to design a new scraper evaporation device to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems existing in the prior art, the utility model provides a scraper evaporation device.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] The utility model provides a scraper evaporation device, comprising an evaporator, a condenser, and a gas-liquid separator connected in series, a vacuum pump, a driving mechanism, and a control mechanism, wherein the vacuum pump is connected to the evaporator;

[0008] A scraping mechanism is arranged inside the evaporator, and the scraping mechanism comprises a driving shaft, a plurality of fixing parts, a scraper and a spiral pusher. The driving shaft is arranged to extend along the axial direction of the evaporator, and the driving shaft is connected to the driving mechanism.

[0009] A plurality of the fixing members are sleeved on the driving shaft in sequence, the ends of the fixing members are connected in sequence through transverse connecting members, the scraper is vertically arranged on the transverse connecting member, and the spiral push piece is fixedly connected to the driving shaft.

[0010] The scraper evaporation device realizes evaporation of saline wastewater and scraping off of crystallized salt through the cooperation of the spiral pusher and the scraper, thereby reducing friction and increasing service life.

[0011] On the basis of the above technical solution, the present invention can also make the following technical improvements:

[0012] Furthermore, the scraper includes an elastic scraper and a fixed scraper.

[0013] The technical effect of adopting the above technical solution is: relying on the mutual cooperation between the elastic scraper and the fixed scraper, the crystals on the inner wall of the evaporator are scraped off to avoid the accumulation of materials on the inner wall of the evaporator.

[0014] Furthermore, the fixing member is a triangular rib plate, a through hole is formed on the triangular rib plate, and a plurality of the triangular rib plates are sleeved on the driving shaft at equal intervals.

[0015] Furthermore, the three apex angles of the plurality of triangular rib plates are connected respectively by a first transverse connecting member, a second transverse connecting member, and a third transverse connecting member.

[0016] The technical effect of adopting the above technical solution is: forming a stable scraping mechanism, and at the same time increasing the surface area of ​​the scraping mechanism, facilitating the installation of as many scrapers and spiral pushers as possible, ensuring the scraping effect of crystals, and improving evaporation efficiency.

[0017] Furthermore, a fourth transverse connector, a fifth transverse connector and a sixth transverse connector that penetrate each triangular rib plate are respectively arranged between the driving shaft and the first transverse connector, between the driving shaft and the second transverse connector, and between the driving shaft and the third transverse connector.

[0018] The technical effect of adopting the above technical solution is to further improve the stability of the scraping mechanism.

[0019] Furthermore, the first transverse connecting member, the second transverse connecting member and the third transverse connecting member are all provided with elastic scrapers and fixed scrapers, and the elastic scrapers and fixed scrapers are all alternately arranged on the first transverse connecting member, the second transverse connecting member and the third transverse connecting member.

[0020] The technical effect of adopting the above technical solution is to increase the number of installed elastic scrapers and fixed scrapers and improve the scraping effect of crystals.

[0021] Furthermore, the fixed scraper includes a plurality of scrapers arranged in parallel, and the distance between the scrapers and the inner wall of the evaporator is 5-7 mm.

[0022] The technical effect of adopting the above technical solution is: while ensuring the crystal scraping effect, the wear of the scraper is avoided.

[0023] Furthermore, it also includes a condensation water tank and a centrifugal pump connected to each other, and the condensation water tank is connected to the condenser.

[0024] The technical effect of adopting the above technical solution is to discharge the condensed water in the condenser smoothly.

[0025] Furthermore, it also includes a solution storage tank connected to the evaporator.

[0026] The technical effect of adopting the above technical solution is: continuously conveying saline wastewater to the evaporator and metering the feed amount.

[0027] Furthermore, the outer wall of the evaporator is provided with a jacket, and steam flows through the jacket.

[0028] The technical effect of adopting the above technical solution is that heat is conducted through the wall of the evaporator to heat the liquid in the evaporator.

[0029] Compared with the prior art, the utility model has the following technical effects:

[0030] The scraper evaporation device provided by the utility model can realize efficient evaporation and separation of saline wastewater. A scraper mechanism is arranged in the evaporator, and the scraper structure is specifically designed to effectively reduce the friction resistance caused by crystals in the evaporator, improve work efficiency, and at the same time increase the driving force of the scraper mechanism and reduce energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram showing the structure of a scraper evaporation device according to an embodiment of the utility model is shown;

[0032] Figure 2 A schematic diagram showing the structure of the scraping mechanism of an embodiment of the utility model is shown;

[0033] Figure 3 A front view of the scraper mechanism is shown;

[0034] Figure 4 A top view of the scraper mechanism is shown;

[0035] Figure 5 A left side view of the scraper mechanism is shown;

[0036] Reference numerals:

[0037] 1. Evaporator; 2. Condenser; 3. Gas-liquid separator; 4. Driving mechanism; 5. Vacuum pump; 6. Centrifugal pump; 7. Solution storage tank; 8. Condensate tank; 9. Control mechanism; 10. Driving shaft; 11. Elastic scraper; 12. Fixed scraper; 13. Spiral pusher; 14. Fixing member; 15. First transverse connecting member; 16. Second transverse connecting member; 17. Third transverse connecting member; 18. Fourth transverse connecting member; 19. Fifth transverse connecting member; 20. Sixth transverse connecting member. DETAILED DESCRIPTION

[0038] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0039] See also Figure 1-5 The scraper evaporation device of the utility model comprises an evaporator 1, a condenser 2, and a gas-liquid separator 3 which are connected in series in sequence, and also comprises a vacuum pump 5, a driving mechanism 4, and a control mechanism 9. The vacuum pump 5 is connected to the evaporator 1, so that the inside of the evaporator 1 is a negative pressure environment, thereby improving the evaporation and crystallization speed of the solution inside the evaporator 1;

[0040] A scraping mechanism is arranged inside the evaporator 1, and the scraping mechanism comprises a driving shaft 10, a plurality of fixing members 14, a scraper and a spiral pusher 13. The driving shaft 10 is arranged to extend along the axial direction of the evaporator 1, and the driving shaft 10 is connected to the driving mechanism 4;

[0041] The plurality of fixing members 14 are sequentially sleeved on the driving shaft 10 , and the ends of the fixing members 14 are sequentially connected via transverse connecting members. The scraper is vertically arranged on the transverse connecting member, and the spiral push piece 13 is fixedly connected to the driving shaft 10 .

[0042] The scraper evaporation device of the utility model adopts a spiral pusher 13 and utilizes the spiral material-moving effect to reduce the friction between the scraper and the crystallized salt. Specifically, the spiral pusher 13 imitates the effect of a propeller and can generate forward or backward thrust to push away a large amount of crystallized salt, thereby helping the scraper to pass through a small amount of salt solution more easily, thereby minimizing the resistance of the scraper, increasing the service life of the scraper, and also saving energy and being environmentally friendly.

[0043] Optionally, the scraper includes an elastic scraper 11 and a fixed scraper 12, the fixed scraper 12 includes a plurality of parallel scrapers, the distance between the scrapers and the inner wall of the evaporator 1 is 5-7 mm, the elastic scraper 11 is in close contact with the inner wall of the evaporator 1, the elastic scraper 11 serves to scrape off crystals adhered to the inner wall of the evaporator 1, and the fixed scraper 12 serves to stir the solution, accelerate the evaporation and crystallization of the solution, and push the crystals toward the outlet direction, and the elastic scraper 11 and the fixed scraper 12 simultaneously serve to make the solution transfer heat faster and be heated more evenly.

[0044] Optionally, each fixing member 14 is a triangular rib plate, and each triangular rib plate is provided with a plurality of through holes, and each triangular rib plate is sleeved on the driving shaft 10 through the through holes at equal intervals, and the three apex angles of each triangular rib plate are connected in sequence through the first transverse connecting member 15, the second transverse connecting member 16, and the third transverse connecting member 17, respectively. A fourth transverse connecting member 18, a fifth transverse connecting member 19, and a sixth transverse connecting member 20 that penetrate the through holes of each triangular rib plate are respectively provided between the driving shaft 10 and the first transverse connecting member 15, between the driving shaft 10 and the second transverse connecting member 16, and between the driving shaft 10 and the third transverse connecting member 17, so as to improve the structural stability of the scraper mechanism and facilitate the installation of the elastic scraper 11 and the fixed scraper 12.

[0045] Optionally, elastic scrapers 11 and fixed scrapers 12 are provided on the first transverse connector 15, the second transverse connector 16 and the third transverse connector 17, and the elastic scrapers 11 and the fixed scrapers 12 are staggered on the first transverse connector 15, the second transverse connector 16 and the third transverse connector 17 to improve the scraping effect of the crystallized salt. The number of triangular ribs is preferably 7. Along the extension direction of the active shaft 10, an elastic scraper, a fixed scraper, a fixed scraper, an elastic scraper, a fixed scraper and a fixed scraper are sequentially arranged between two adjacent triangular ribs, so that the stirring disturbance of the solution, the evaporation of the solution and the scraping of the crystallized salt are carried out in coordination.

[0046] Optionally, the elastic scraper 11 is detachably connected to the first transverse connector 15 and the fourth transverse connector 18, the second transverse connector and the fifth transverse connector, the third transverse connector 17 and the sixth transverse connector 20 by bolts, so as to facilitate disassembly and replacement while improving installation stability.

[0047] Optionally, the scraper evaporation device further includes a condensation water tank 8 and a centrifugal pump 6 connected to each other, wherein the condensation water tank 8 is connected to the condenser 2 , and the condensation water discharged from the condenser 2 enters the condensation water tank 8 and is discharged to the outside of the device through the centrifugal pump 6 .

[0048] Optionally, the scraper evaporation device also includes a solution storage tank 7 connected to the evaporator 1, one end of the solution storage tank 7 is connected to the inlet of the evaporator 1, and the other end is connected to the external raw material, which is used to transport the salt-containing wastewater to be treated to the evaporator 1 for evaporation and crystallization, and to measure the feed amount.

[0049] Optionally, the outer wall of the evaporator 1 is provided with a jacket, and hot steam flows in the jacket. The heat of the steam is transferred to the inside of the evaporator 1 through the tank wall of the evaporator 1, and the solution in the evaporator 1 is heated by steam.

[0050] Optionally, the driving mechanism 4 is a driving reducer.

[0051] Specifically, when the scraper evaporation device is used to treat saline wastewater, the saline wastewater in the solution storage tank 7 enters the evaporator 1, the driving reducer is turned on, the driving shaft 10 is driven to rotate, and the spiral push piece 13 connected thereto is driven to rotate, and at the same time, the rotation of the driving shaft 10 drives the triangular rib plate to rotate, and further drives the rotation of each transverse connecting member, the elastic scraper 11 and the fixed scraper 12, so as to realize the evaporation of the saline wastewater, and the unevaporated residual crystals are transferred to the outlet of the evaporator 1 by the spiral push piece 13 and the elastic scraper and the fixed scraper 12 and discharged; the evaporated gas enters the condenser 2 and then enters the gas-liquid separator after condensation, and the liquid therein is separated and collected by the gas-liquid separator; the control mechanism 9 monitors the situation in the evaporator 1, including the solution temperature, steam pressure, vacuum degree, etc., so as to adjust the scraper speed, heating power or exhaust rate and other parameters in time; when the preset evaporation time or product quality requirement (the water content of the solid product is in a completely dry or semi-dry state) is reached, the equipment stops running.

[0052] The scraper evaporation device provided by the utility model has the following effects:

[0053] As a result of the specific scraping mechanism in the evaporator, a spiral pusher can push the crystallized salt to one side, which greatly reduces the contact area between the crystallized salt and the elastic scraper, thereby reducing the wear of the elastic scraper, increasing the service life of the elastic scraper, and reducing the replacement frequency of the elastic scraper. The equipment runs smoothly, reducing the downtime due to malfunctions, improving production efficiency and output, product quality, and reducing the operating cost of the equipment; the structure is simple and easy to manufacture, and the cost is low.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A scraper evaporation device, characterized in that: It includes an evaporator, a condenser, and a gas-liquid separator connected in series, and also includes a vacuum pump, a driving mechanism, and a control mechanism, wherein the vacuum pump is connected to the evaporator; A scraping mechanism is arranged inside the evaporator, and the scraping mechanism comprises a driving shaft, a plurality of fixing parts, a scraper and a spiral pusher. The driving shaft is arranged to extend along the axial direction of the evaporator, and the driving shaft is connected to the driving mechanism. The plurality of fixing members are sleeved on the driving shaft in sequence, the ends of the fixing members are connected in sequence through transverse connecting members, the scraper is vertically arranged on the transverse connecting member, and the spiral push piece is fixedly connected to the driving shaft.

2. The scraper evaporation device according to claim 1, characterized in that: The scraper includes an elastic scraper and a fixed scraper.

3. The scraper evaporation device according to claim 2, characterized in that: The fixing member is a triangular rib plate, a through hole is opened on the triangular rib plate, and a plurality of the triangular rib plates are sleeved on the driving shaft at equal intervals.

4. The scraper evaporation device according to claim 3, characterized in that: The three vertex angles of the plurality of triangular rib plates are connected respectively by a first transverse connecting member, a second transverse connecting member and a third transverse connecting member.

5. The scraper evaporation device according to claim 4, characterized in that: A fourth transverse connector, a fifth transverse connector and a sixth transverse connector that penetrate each triangular rib plate are respectively arranged between the driving shaft and the first transverse connector, between the driving shaft and the second transverse connector, and between the driving shaft and the third transverse connector.

6. The scraper evaporation device according to claim 5, characterized in that: The first transverse connecting member, the second transverse connecting member and the third transverse connecting member are all provided with elastic scrapers and fixed scrapers, and the elastic scrapers and fixed scrapers are all alternately arranged on the first transverse connecting member, the second transverse connecting member and the third transverse connecting member.

7. The scraper evaporation device according to claim 2, characterized in that: The fixed scraper includes a plurality of scrapers arranged in parallel, and the distance between the scrapers and the inner wall of the evaporator is 5-7 mm.

8. The scraper evaporation device according to claim 1, characterized in that: It also includes a condensing water tank and a centrifugal pump connected to each other, and the condensing water tank is connected to the condenser.

9. The scraper evaporation device according to claim 1, characterized in that: Also included is a solution storage tank connected to the evaporator.

10. The scraper evaporation device according to claim 1, characterized in that: The outer wall of the evaporator is provided with a jacket, and steam flows in the jacket.

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