A high-salt wastewater treatment device for a power plant

Abstract

The present invention relates to the technical field of wastewater treatment, and specifically discloses a high-salt wastewater treatment device for a power plant, comprising a shell, wherein a accommodating chamber is arranged in the shell, the inner wall of the accommodating chamber is fixedly connected to the edge of a mesh plate, a plurality of mesh holes are arranged on the mesh plate, a vertical pipe is fixed in the accommodating chamber, the vertical pipe is located above the mesh plate, a second rotatable driving shaft is installed on the bottom side of the accommodating chamber, a first driving mechanism for driving the second driving shaft to rotate is installed on the shell, the top end of the second driving shaft extends to the top of the mesh plate, an arc-shaped scraper rod is installed on the top end of the second driving shaft, the arc-shaped scraper rod is fitted with the top side of the mesh plate, and no less than three layers of spheres are stacked on the mesh plate. The high-salt wastewater treatment device for a power plant is convenient for cleaning crystallized salt, thereby reducing the maintenance cost and downtime of the device.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a high-salt wastewater treatment device for a power plant. Background Art

[0002] High-salinity wastewater from power plants mainly comes from boiler blowdown, cooling system, flue gas desulfurization system and fly ash treatment system. High-salinity wastewater contains Cl - 、SO4 2- 、Na + , Ca 2+ Mainly inorganic salts, if high-salt wastewater is discharged directly into the environment, it will cause changes in the salt content in the water system, affect the growth and reproduction of animals and plants, and pollute the environment.

[0003] Evaporation and crystallization technology is a common treatment method for high-salt wastewater treatment. However, salt will form crystallized salt on the surface of the evaporator or heat exchanger, resulting in a decrease in heat transfer efficiency. The crystallized salt is also inconvenient to clean. The deposition of salt not only affects the heat transfer performance of the equipment, but may also cause system blockage, increasing equipment maintenance costs and downtime. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-salt wastewater treatment device for a power plant, which is convenient for cleaning the crystallized salt and reduces the maintenance cost and downtime of the device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-salt wastewater treatment device for a power plant, comprising a shell, a accommodating chamber is arranged in the shell, the inner wall of the accommodating chamber is fixedly connected to the edge of the mesh plate, a plurality of mesh holes are arranged on the mesh plate, a vertical pipe is fixed in the accommodating chamber, the vertical pipe is located above the mesh plate, a second rotatable drive shaft is installed on the bottom side of the accommodating chamber, a first drive mechanism for driving the second drive shaft to rotate is installed on the shell, the top end of the second drive shaft extends to above the mesh plate, the top end of the second drive shaft is installed with an arc scraper rod, the arc scraper rod is in contact with the top side of the mesh plate, and no less than three layers of spheres are stacked on the mesh plate.

[0006] A first rotatable driving shaft is installed on the top side of the accommodating cavity, a second driving mechanism that drives the first driving shaft to rotate is installed on the shell, a spiral blade is fixedly installed on the first driving shaft, the spiral blade is located in the vertical tube, and a gap is provided between the outer edge of the spiral blade and the inner wall of the vertical tube, and an elastic sealing sheet that blocks the inner cavity of the vertical tube is fixed on the first driving shaft.

[0007] The shell is provided with a steam outlet higher than the sphere, the shell is provided with a steam inlet lower than the mesh plate, and the inner cavity of the accommodating cavity is provided with a liquid inlet pipe higher than the sphere.

[0008] The liquid inlet pipe sprays high-salt wastewater toward the sphere, and the steam inlet is injected into the steam, the temperature of the steam being higher than 120°C.

[0009] Among them, the second driving mechanism drives the spiral blade to rotate through the first driving shaft, and the first driving mechanism drives the arc scraper rod to rotate through the second driving shaft. The rotating arc scraper rod moves the sphere close to the mesh plate to the bottom of the vertical tube, and then the sphere under the vertical tube moves upward driven by the spiral blade.

[0010] As a preferred technical solution of the present invention, it also includes a steam booster pump and a heat exchanger, the steam outlet is connected to the air inlet of the steam booster pump, the air outlet of the steam booster pump is connected to the hot medium inlet of the heat exchanger, and the cold medium outlet of the heat exchanger is connected to the steam inlet.

[0011] The cold medium inlet of the heat exchanger is connected to an external steam source, and the steam temperature in the hot medium inlet of the heat exchanger is higher than 120°C.

[0012] As a preferred technical solution of the present invention, a spring is sleeved on the second driving shaft, the top end of the spring is fixedly connected to the mesh plate, a support is fixed to the position of the second driving shaft close to the bottom side of the accommodating cavity, the angle between the top side of the support and the second driving shaft is an acute angle, and the bottom end of the spring abuts against the top side of the support.

[0013] When the first driving mechanism drives the second driving shaft to rotate, the spring and the second driving shaft rotate relative to each other, and the spring is continuously compressed and extended.

[0014] As a preferred technical solution of the present invention, a scraper arc rod is fixed on the second driving shaft, the scraper arc rod and the bottom side of the accommodating cavity are slidably fitted, and a discharge port connected to the accommodating cavity is opened on the bottom side of the shell.

[0015] As a preferred technical solution of the present invention, a fracture is provided on the spiral blade, an elastic isolation sheet is fixed to the position of the first drive shaft corresponding to the fracture, and the elastic isolation sheet is slidably fitted to the inner wall of the vertical tube.

[0016] As a preferred technical solution of the present invention, a pressure-stabilizing valve is installed at the heat medium outlet of the heat exchanger.

[0017] As a preferred technical solution of the present invention, an air extraction hole communicating with the accommodating cavity is provided on the top side of the shell.

[0018] Wherein, the air pressure in the accommodating chamber is 30.0kPa-80.0kPa.

[0019] As a preferred technical solution of the present invention, a plurality of protrusions are fixed on the inner wall of the vertical tube.

[0020] As a preferred technical solution of the present invention, the ratio of the inner diameter of the vertical pipe to the diameter of the sphere is 2.5-5.0:1.0, and the ratio of the distance between the vertical pipe and the mesh plate to the diameter of the sphere is 1.1-1.9:1.0.

[0021] As a preferred technical solution of the present invention, the liquid inlet pipe is annular or arc-shaped, and a plurality of nozzles are installed on the liquid inlet pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the high-salt wastewater treatment device for a power plant according to an example of the present invention, the high-salt wastewater flows downward along the surface of the sphere under the action of gravity, and a liquid film is formed on the surface of the sphere. The steam evaporates the water in the liquid film-like high-salt wastewater, and crystallized salt adheres to the surface of the sphere. The spiral blades cause the sphere and the inner wall of the vertical pipe to continuously rub, and the crystallized salt on the sphere is detached. The detached crystallized salt falls to the bottom of the accommodating chamber through the mesh holes of the mesh plate. The high-salt wastewater treatment device for a power plant is convenient for cleaning the crystallized salt, thereby reducing the maintenance cost and downtime of the device.

[0024] 2. In the high-salt wastewater treatment device of a power plant of the present invention, a fracture is provided on the spiral blade, and an elastic isolation sheet is fixed at the position of the first drive shaft corresponding to the fracture. The evaporation of high-salt wastewater and the removal of crystallized salt on the sphere can be carried out simultaneously, thereby improving the removal efficiency of the high-salt wastewater treatment device of the power plant for high-salt wastewater.

[0025] 3. In the power plant high-salt wastewater treatment device of the example of the present invention, when the first driving mechanism drives the second driving shaft to rotate, the spring and the second driving shaft rotate relative to each other, the spring scrapes off the crystallized salt on the second driving shaft, the support platform causes the spring to be continuously compressed and extended, and the spring is continuously deformed to cause the crystallized salt on the spring to fall off, thereby preventing the crystallized salt on the second driving shaft from affecting the rotation of the second driving shaft.

[0026] 4. In the power plant high-salt wastewater treatment device of the present invention, the steam booster pump pressurizes and heats the steam discharged from the accommodating chamber, and then performs heat exchange between the heated steam and the steam entering the accommodating chamber, thereby reducing the steam consumption of the device.

[0027] 5. In the high-salt wastewater treatment device for a power plant according to the example of the present invention, when the sphere in the vertical pipe contacts one of the protrusions, the sphere bounces and then collides with the inner wall of the vertical pipe, so that the crystallized salt on the sphere is completely detached. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 It is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure at A;

[0031] Figure 4 for Figure 2 A schematic diagram of the structure at B;

[0032] Figure 5 It is a schematic cross-sectional structural diagram of another embodiment of the present invention.

[0033] In the figure: 1 shell, 2 liquid inlet pipe, 3 steam pressure pump, 4 heat exchanger, 5 first drive mechanism, 6 second drive mechanism, 7 nozzle, 8 first drive shaft, 9 elastic sealing plate, 10 vertical pipe, 11 spiral blade, 12 ball, 13 protrusion, 14 pressure regulating valve, 15 mesh plate, 16 second drive shaft, 17 scraper arc rod, 18 arc scraper rod, 19 steam pipe, 20 discharge port, 21 support platform, 22 spring, 23 elastic isolation plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-4 The present embodiment discloses a high-salt wastewater treatment device for a power plant, comprising a shell 1, wherein a receiving chamber is arranged in the shell 1, wherein the inner wall of the receiving chamber is fixedly connected to the edge of a mesh plate 15, the mesh plate 15 is arranged horizontally, and a plurality of mesh holes are arranged on the mesh plate 15, a vertically arranged vertical pipe 10 is fixed in the receiving chamber through a fixing frame, and the vertical pipe 10 is located above the mesh plate 15, and a second driving shaft 16 for rotating is installed on the bottom side of the receiving chamber through a bearing seat, and a first driving mechanism 5 for driving the second driving shaft 16 to rotate is installed on the shell 1, and the top end of the second driving shaft 16 passes through the mesh holes of the mesh plate 15 and extends to the top of the mesh plate 15, and an arc scraper rod 18 is installed on the top end of the second driving shaft 16, and the arc scraper rod 18 and the top side of the mesh plate 15 are slidably fitted, and no less than three layers of spheres 12 are stacked on the mesh plate 15.

[0037] A first rotatable driving shaft 8 is installed on the top side of the accommodating cavity through a bearing seat, a second driving mechanism 6 for driving the first driving shaft 8 to rotate is installed on the shell 1, a spiral blade 11 is fixedly installed on the first driving shaft 8, the spiral blade 11 is located in the vertical pipe 10, and a gap is provided between the outer edge of the spiral blade 11 and the inner wall of the vertical pipe 10, an elastic closing piece 9 for blocking the inner cavity of the vertical pipe 10 is fixed on the first driving shaft 8, and the elastic closing piece 9 is located above the spiral blade 11.

[0038] The shell 1 is provided with a steam outlet higher than the sphere 12 , the shell 1 is provided with a steam inlet lower than the mesh plate 15 , and the inner cavity of the accommodating cavity is provided with a liquid inlet pipe 2 higher than the sphere 12 .

[0039] Preferably, the ratio of the inner diameter of the vertical tube 10 to the diameter of the sphere 12 is 2.5-5.0:1.0, and the ratio of the distance between the vertical tube 10 and the mesh plate 15 to the diameter of the sphere 12 is 1.1-1.9:1.0.

[0040] Preferably, the sphere 12 is a hollow plastic sphere or a hollow metal sphere.

[0041] The first drive mechanism 5 is an electric motor or a hydraulic motor, and the second drive mechanism 6 is an electric motor or a hydraulic motor. The first drive mechanism 5 and the second drive mechanism 6 used in the present invention are all commonly used power equipment in the prior art, and their working methods and structures are all well-known technologies and will not be elaborated here.

[0042] The working process and principle of this embodiment are:

[0043] An external liquid pump continuously sprays high-salt wastewater onto the sphere 12 through the liquid inlet pipe 2. The high-salt wastewater flows downward along the surface of the sphere 12 under the action of gravity, and the high-salt wastewater forms a liquid film on the surface of the sphere 12. The staff uses an external steam source to inject steam into the steam inlet. The temperature of the steam is higher than 120°C. The steam passes through the gap of the sphere 12. The steam evaporates the water in the liquid film-like high-salt wastewater, and crystallized salt adheres to the surface of the sphere 12. The elastic sealing sheet 9 prevents the steam from flowing upward along the inner cavity of the vertical pipe 10.

[0044] When it is necessary to clean the crystallized salt on the sphere 12, the staff stops the liquid inlet pipe 2 from spraying high-salt wastewater onto the sphere 12, stops injecting steam into the steam inlet, and causes the second drive mechanism 6 to drive the first drive shaft 8 and the spiral blade 11 to rotate. The staff causes the first drive mechanism 5 to drive the second drive shaft 16 and the arc scraper 18 to rotate. The rotating arc scraper 18 causes the sphere 12 close to the mesh plate 15 to move to the bottom of the vertical pipe 10, and then the sphere 12 under the vertical pipe 10 moves upward driven by the spiral blade 11. The spiral blade 11 causes the sphere 12 and the inner wall of the vertical pipe 10 to continuously rub, and the crystallized salt on the sphere 12 is detached. The detached crystallized salt falls to the bottom of the accommodating chamber through the gap between the spiral blade 11 and the inner wall of the vertical pipe 10 and the mesh holes of the mesh plate 15, thereby achieving the removal of the crystallized salt on the sphere 12. The spiral blade 11 causes the sphere 12 to push open the elastic sealing sheet 9, and the sphere 12 leaving the elastic sealing sheet 9 moves to the accumulated sphere 12.

[0045] The high-salt wastewater treatment device of this power plant is convenient for cleaning crystallized salt, thus reducing the maintenance cost and downtime of the device.

[0046] Furthermore, the temperature of the high-salinity wastewater in the liquid inlet pipe 2 is higher than 90° C., thereby improving the evaporation efficiency of the water in the high-salinity wastewater.

[0047] Furthermore, the first drive shaft 8 and the second drive shaft 16 are rotatably connected via a bearing, thereby improving the stability of the first drive shaft 8 and the second drive shaft 16 during rotation.

[0048] Preferably, the liquid inlet pipe 2 is annular or arc-shaped, and a plurality of nozzles 7 are installed on the liquid inlet pipe 2 so that the high-salt wastewater can be sprayed evenly in the accommodating chamber.

[0049] Embodiment 2:

[0050] like Figure 2 As shown, this embodiment discloses a high-salt wastewater treatment device for a power plant, and its structure is roughly the same as that of the first embodiment, except that this embodiment also includes a steam booster pump 3 and a heat exchanger 4, the steam outlet is connected to the air inlet of the steam booster pump 3, the air outlet of the steam booster pump 3 is connected to the hot medium inlet of the heat exchanger 4, and the cold medium outlet of the heat exchanger 4 is connected to the steam inlet.

[0051] The cold medium inlet of the heat exchanger 4 is connected to an external steam source, the steam temperature in the hot medium inlet of the heat exchanger 4 is higher than 120°C, and the steam temperature in the hot medium inlet of the heat exchanger 4 is higher than the steam temperature in the cold medium inlet of the heat exchanger 4.

[0052] The working process and principle of this embodiment are:

[0053] The steam pressure pump 3 pressurizes and heats the steam discharged from the accommodating chamber, and then performs heat exchange between the heated steam and the steam entering the accommodating chamber, thereby reducing the steam consumption of the device.

[0054] Preferably, the heat exchanger 4 is a plate heat exchanger commonly used in the prior art.

[0055] Embodiment three:

[0056] like Figure 2 , 3 As shown in Figures 4 and 5, this embodiment discloses a high-salt wastewater treatment device for a power plant, and its structure is substantially the same as that of the second embodiment, except that, in this embodiment, a spring 22 is sleeved on the second drive shaft 16, and the top end of the spring 22 is fixedly connected to the mesh plate 15, and a support 21 is fixed to the second drive shaft 16 near the bottom side of the accommodating cavity, and the angle between the top side of the support 21 and the second drive shaft 16 is an acute angle, and the bottom end of the spring 22 abuts against the top side of the support 21.

[0057] As the first driving mechanism 5 drives the second driving shaft 16 to rotate, the spring 22 and the second driving shaft 16 rotate relative to each other, and the spring 22 scrapes off the crystallized salt on the second driving shaft 16. As the support platform 21 rotates with the second driving shaft 16, the spring 22 is continuously compressed and extended, and the spring 22 is continuously deformed to cause the crystallized salt on the spring 22 to detach, thereby preventing the crystallized salt on the second driving shaft 16 from affecting the rotation of the second driving shaft 16.

[0058] Embodiment 4:

[0059] like Figure 4 As shown, this embodiment discloses a high-salt wastewater treatment device for a power plant, and its structure is substantially the same as that of the second embodiment, except that, in this embodiment, an arc-shaped scraper arc rod 17 is fixed on the second drive shaft 16, and the scraper arc rod 17 is slidably fitted with the bottom side of the accommodating chamber, and a discharge port connected to the accommodating chamber is provided on the bottom side of the shell 1. The first drive mechanism 5 drives the scraper arc rod 17 to rotate through the second drive shaft 16, and the scraper arc rod 17 pushes the crystallized salt on the bottom side of the accommodating chamber to the discharge port, so that the crystallized salt on the bottom side of the accommodating chamber can be discharged conveniently.

[0060] Embodiment five:

[0061] like Figure 5 As shown, this embodiment discloses a high-salt wastewater treatment device for a power plant. Based on any one of embodiments one to four, a fracture is provided on the spiral blade 11 of this embodiment, and an elastic isolation plate 23 is fixed to the position of the first drive shaft 8 corresponding to the fracture, and the elastic isolation plate 23 and the inner wall of the vertical pipe 10 are slidably fitted.

[0062] The working process and principle of this embodiment are:

[0063] During the evaporation of high-salinity wastewater, the first driving mechanism 5 and the second driving mechanism 6 both work, the spiral blade 11 drives the ball 12 to move upward, and the elastic isolation sheet 23 and the elastic sealing sheet 9 reduce the steam flowing through the vertical pipe 10.

[0064] The evaporation of high-salinity wastewater and the removal of crystallized salt on the sphere 12 can be carried out simultaneously, thereby improving the removal efficiency of the high-salinity wastewater treatment device of the power plant for high-salinity wastewater.

[0065] Furthermore, the staff controls the rotation speed of the spiral blade 11 and / or the rotation speed of the arc scraper 18 so that the number of the balls 12 in the inner cavity of the vertical pipe 10 is no more than two, thereby reducing the probability of the elastic isolation plate 23 and the elastic closing plate 9 being opened at the same time and reducing the volume of steam flowing through the inner cavity of the vertical pipe 10.

[0066] Embodiment six:

[0067] like Figure 2 As shown, this embodiment discloses a high-salt wastewater treatment device for a power plant, and its structure is substantially the same as that of the second embodiment, except that a pressure-stabilizing valve 14 is installed at the heat medium outlet of the heat exchanger 4 in this embodiment to maintain the pressure of the pressurized steam in the heat exchanger 4 and to minimize the temperature fluctuation of the pressurized steam.

[0068] Preferably, the steam from the pressure regulating valve 14 enters the cold medium inlet of the heat exchanger 4 after water-gas separation, so as to realize the recycling of steam, reduce the amount of steam replenishment, and reduce the operating cost of the high-salt wastewater treatment device of the power plant.

[0069] Embodiment seven:

[0070] like Figure 1 , 2 As shown, this embodiment discloses a high-salt wastewater treatment device for a power plant, and its structure is substantially the same as that of the second embodiment, except that an air extraction hole connected to the accommodating cavity is provided on the top side of the shell 1 of this embodiment, and an external negative pressure pump extracts air in the accommodating cavity through the air extraction hole, and the air pressure in the accommodating cavity is 30.0 kPa-80.0 kPa 。

[0071] The negative pressure state is maintained in the accommodating chamber, the boiling point of the water in the accommodating chamber is reduced, the evaporation amount of the water in the high-salt wastewater is increased, and the operation cost of the high-salt wastewater treatment device of the power plant is reduced.

[0072] Embodiment eight:

[0073] like Figure 2 , 3As shown, this embodiment discloses a high-salt wastewater treatment device for a power plant, and its structure is substantially the same as that of the first embodiment, except that a plurality of protrusions 13 are fixed to the inner wall of the vertical pipe 10 of this embodiment, and when the sphere 12 in the vertical pipe 10 contacts one of the protrusions 13, the sphere 12 bounces and then collides with the inner wall of the vertical pipe 10, so that the crystallized salt on the sphere 12 is completely detached.

[0074] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A high-salt wastewater treatment device for a power plant, characterized by: The invention comprises a shell (1), wherein a receiving cavity is arranged in the shell (1), the inner wall of the receiving cavity is fixedly connected to the edge of a mesh plate (15), a plurality of mesh holes are arranged on the mesh plate (15), a vertically arranged vertical tube (10) is fixed in the receiving cavity, the vertical tube (10) is located above the mesh plate (15), a second rotatable driving shaft (16) is installed on the bottom side of the receiving cavity, a first driving mechanism (5) for driving the second driving shaft (16) to rotate is installed on the shell (1), the top end of the second driving shaft (16) extends to the top of the mesh plate (15), an arc-shaped scraping rod (18) is installed on the top end of the second driving shaft (16), the arc-shaped scraping rod (18) is in contact with the top side of the mesh plate (15), and no less than three layers of spheres (12) are stacked on the mesh plate (15); A rotatable first drive shaft (8) is mounted on the top side of the accommodating cavity, a second drive mechanism (6) for driving the first drive shaft (8) to rotate is mounted on the housing (1), a spiral blade (11) is fixedly mounted on the first drive shaft (8), the spiral blade (11) is located in the vertical tube (10), and a gap is provided between the outer edge of the spiral blade (11) and the inner wall of the vertical tube (10), and an elastic sealing sheet (9) for sealing the inner cavity of the vertical tube (10) is fixed on the first drive shaft (8); The shell (1) is provided with a steam outlet higher than the sphere (12), the shell (1) is provided with a steam inlet lower than the mesh plate (15), and the inner cavity of the accommodating chamber is provided with a liquid inlet pipe (2) higher than the sphere (12); The ratio of the inner diameter of the vertical tube (10) to the diameter of the sphere (12) is 2.5-5.0:1.0, and the ratio of the distance between the vertical tube (10) and the mesh plate (15) to the diameter of the sphere (12) is 1.1-1.9:1.0; The liquid inlet pipe (2) sprays high-salt wastewater toward the sphere (12), and steam is injected into the steam inlet, wherein the temperature of the steam is higher than 120° C.; The second driving mechanism (6) drives the spiral blade (11) to rotate via the first driving shaft (8), and the first driving mechanism (5) drives the arc scraper (18) to rotate via the second driving shaft (16); the rotating arc scraper (18) causes the ball (12) close to the screen plate (15) to move to below the vertical tube (10), and then the ball (12) below the vertical tube (10) moves upward driven by the spiral blade (11).

2. The power plant high-salt wastewater treatment device according to claim 1 is characterized in that: It also includes a steam pressure pump (3) and a heat exchanger (4), wherein the steam outlet is connected to the air inlet of the steam pressure pump (3), the air outlet of the steam pressure pump (3) is connected to the hot medium inlet of the heat exchanger (4), and the cold medium outlet of the heat exchanger (4) is connected to the steam inlet; The cold medium inlet of the heat exchanger (4) is connected to an external steam source, and the steam temperature at the hot medium inlet of the heat exchanger (4) is higher than 120°C.

3. The power plant high-salt wastewater treatment device according to claim 2 is characterized in that: A spring (22) is sleeved on the second drive shaft (16), the top end of the spring (22) is fixedly connected to the mesh plate (15), a support platform (21) is fixed to the second drive shaft (16) at a position close to the bottom side of the accommodating cavity, the angle between the top side of the support platform (21) and the second drive shaft (16) is an acute angle, and the bottom end of the spring (22) abuts against the top side of the support platform (21); In the process where the first driving mechanism (5) drives the second driving shaft (16) to rotate, the spring (22) and the second driving shaft (16) rotate relative to each other, and the spring (22) is continuously compressed and extended.

4. The power plant high-salt wastewater treatment device according to claim 2 is characterized in that: A scraper arc rod (17) is fixed on the second drive shaft (16), the scraper arc rod (17) is slidably fitted with the bottom side of the accommodating cavity, and a discharge port communicating with the accommodating cavity is provided on the bottom side of the housing (1).

5. The power plant high-salt wastewater treatment device according to any one of claims 1 to 4, characterized in that: The spiral blade (11) is provided with a fracture, an elastic isolation sheet (23) is fixed to the first drive shaft (8) at a position corresponding to the fracture, and the elastic isolation sheet (23) is slidably fitted to the inner wall of the vertical pipe (10); The rotation speed of the spiral blade (11) and / or the rotation speed of the arc-shaped scraper (18) are controlled so that the number of the balls (12) in the inner cavity of the vertical tube (10) is no more than two, thereby reducing the probability of the elastic isolation plate (23) and the elastic sealing plate (9) being opened at the same time and reducing the volume of steam flowing through the inner cavity of the vertical tube (10).

6. The power plant high-salt wastewater treatment device according to claim 2 is characterized by: A pressure-stabilizing valve (14) is installed at the heat medium outlet of the heat exchanger (4).

7. The power plant high-salt wastewater treatment device according to claim 2 is characterized by: The top side of the shell (1) is provided with an air extraction hole connected to the accommodating cavity; Wherein, the air pressure in the accommodating chamber is 30.0kPa-80.0kPa.

8. The power plant high-salt wastewater treatment device according to claim 1 is characterized by: A plurality of protrusions (13) are fixed to the inner wall of the vertical pipe (10).

9. The power plant high-salt wastewater treatment device according to claim 1, characterized in that: The liquid inlet pipe (2) is annular or arc-shaped, and a plurality of nozzles (7) are mounted on the liquid inlet pipe (2).

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