A steel belt type falling film evaporation concentration device

Abstract

The present invention relates to the field of evaporation and concentration equipment, in particular to a steel belt type falling film evaporation and concentration device, comprising a horizontally arranged box, wherein a thin steel belt is arranged in the box, wherein the top of the thin steel belt is horizontal, and a spreading box is sleeved in the thin steel belt along its width direction. The thin steel belt in the box of the device has a wavy bottom structure, and the waste liquid is attached to the surface of the thin steel belt through continuous operation to form a thin water film, and heat exchange with the high-temperature steam in the thin steel belt that optimizes the flow path, so as to continuously and rapidly perform evaporation and concentration. The pressure balance component of the device adjusts itself to a pressure difference fluctuation to a balanced state based on the change of the pressure difference between the inside and outside of the thin steel belt, so that the device can operate stably and smoothly. The device can also conveniently increase or decrease the number of boxes to cope with different production scale requirements, and can greatly reduce the manufacturing cost of falling film evaporation and concentration equipment of different specifications, and is easy to assemble, use and maintain.

Description

Technical Field

[0001] The invention relates to the field of evaporation and concentration equipment, in particular to a steel belt type falling film evaporation and concentration device. Background Art

[0002] Falling film evaporation concentration generally refers to spraying high-salt wastewater on the surface of a high-temperature heating component from top to bottom, so that the high-salt wastewater is quickly evaporated and concentrated in the process of flowing down in the form of a water film, and the heat source for evaporation is generally high-temperature steam.

[0003] Existing falling film evaporation equipment is classified according to the arrangement direction of the heating steam pipes, and is divided into horizontal tube falling film evaporation concentration equipment and vertical tube falling film evaporation concentration equipment. These two mainstream methods of achieving concentration by water film evaporation have one thing in common: high-salt wastewater flows from the top of the equipment to the bottom of the equipment without circulation or repeated falling film. Therefore, there are high technical requirements for the heating power and heat exchange efficiency of the equipment. Although the basic principle of the equipment and the internal structure of the evaporator are relatively simple, the densely distributed slender steam heating pipes in the evaporator are not convenient to manufacture, and the cost of use and maintenance is also high. It is also difficult to achieve miniaturization (a long falling film process is required, which corresponds to a larger equipment volume). Therefore, in order to optimize the above problems, a steel belt falling film evaporation concentration device is proposed. Summary of the invention

[0004] In view of the above-mentioned problems or the problems in the prior art that the falling film evaporation concentration equipment is inconvenient to manufacture, use and maintain and difficult to miniaturize, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a steel belt type falling film evaporation concentration device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a steel belt type falling film evaporation concentration device, comprising a horizontally arranged box body, a thin steel belt is arranged in the box body, the top of the thin steel belt is horizontal, a scattering box is sleeved in the thin steel belt along its width direction, and the scattering boxes are evenly distributed along the length direction of the thin steel belt, one end of the scattering box is sealed and the other end is open, a scattering hole is opened on the side wall of the scattering box, and the open end of the scattering box is sealed and fixedly plugged with the side wall of the box body, the bottom of the thin steel belt is arranged in a wavy shape along the outer wall of the scattering box, and the thin steel belt is sleeved with a rotating shaft at the turning point, and the edge of the thin steel belt is sealed and slidably connected with the inner wall of the box body; a steam pipe 1 is arranged on one side of the opening of the scattering box outside the box body, and a steam pipe 2 and an evaporation pipe are arranged on the other side of the box body, the steam pipe 1 and the steam pipe 2 both penetrate the side wall of the box body and communicate with the inside of the scattering box, and the evaporation pipe is connected with the box body between the outer wall of the thin steel belt and the inner wall of the box body.

[0007] As a preferred solution of the steel belt type falling film evaporation concentration device of the present invention, wherein: the box body is rectangular, the box bodies are stacked in the vertical direction, and the box bodies are connected in parallel, and a feed pipe and a discharge pipe are respectively provided on both sides of the box body, and the feed pipe and the discharge pipe are both connected to the box body between the outer wall of the thin steel belt and the inner wall of the box body, and the discharge pipe is connected to the bottom edge of the box body, and solenoid valves are provided between the feed pipe and the box body, and between the discharge pipe and the box body.

[0008] As a preferred solution of the steel belt falling film evaporation concentration device of the present invention, the angle between the top surface and one side of the distribution box is ninety degrees, and the distribution holes are distributed on the vertical wall and the inclined wall of the distribution box.

[0009] As a preferred solution of the steel belt type falling film evaporation concentration device of the present invention, wherein: the inner walls on both sides of the box body are matched with thin steel belts to open slide grooves, the edges of the thin steel belts are slidably connected to the slide grooves, and sealing strips are provided on both sides of the edges of the thin steel belts in the slide grooves.

[0010] As a preferred solution of the steel belt type falling film evaporation concentration device of the present invention, wherein: a pressure balance assembly is arranged at the top of the box body, which includes a cylinder, end covers are sealed at both ends of the cylinder, a piston is sealingly and slidably connected in the cylinder, and both ends of the piston are coaxially connected with a steel pipe, the steel pipe passes through the end cover and is sealingly and slidably sleeved with the end cover, the end of the steel pipe away from the piston passes through and is fixedly connected with a sliding cover, and the end of the steel pipe away from the piston is also sealed and plugged with a transfer pipe joint.

[0011] As a preferred solution of the steel belt falling film evaporation concentration device of the present invention, the adapter is Z-shaped, and the interfaces at both ends of the adapter are circular, the middle section of the adapter is rectangular, and the interface at one end of the adapter away from the piston is vertically downward, the interface at the other end of the adapter is vertically upward, and the middle section of the adapter is horizontally arranged.

[0012] As a preferred solution of the steel belt falling film evaporation concentration device of the present invention, the steel pipe is connected to the top of the sliding cover, and the bottom surface of the sliding cover slides in contact with the inner bottom surface of the adapter head, and the adapter head and the sliding cover are symmetrically arranged on both sides of the box body.

[0013] As a preferred solution of the steel belt falling film evaporation concentration device of the present invention, the bottom interfaces of the two groups of adapter pipes are respectively connected to the steam pipe 1 and the evaporation pipe, and a groove is formed on the peripheral wall of the steel pipe connected to one end of the piston, and the groove connects the adapter pipe, the steel pipe and the cylinder.

[0014] As a preferred solution of the steel belt falling film evaporation concentration device of the present invention, an input shaft is arranged along the axial direction of one end of the rotating shaft, and the input shaft extends outside the box body, and shaft seals are arranged between the input shaft and the inner wall and the outer wall of the box body.

[0015] As a preferred solution of the steel belt falling film evaporation concentration device of the present invention, a motor is arranged at one end of the box body, and both the output shaft and the input shaft of the motor are provided with pulleys, and the pulleys are connected by belts.

[0016] The beneficial effects of the steel belt type falling film evaporation and concentration device of the present invention are as follows: the thin steel belt in the box of the device has a wavy bottom structure, and the waste liquid adheres to the surface of the thin steel belt through continuous operation to form a thin water film, and heat exchanges with the high-temperature steam in the thin steel belt that optimizes the flow path, thereby continuously and quickly performing evaporation and concentration. The pressure balance component of the device adjusts itself to a pressure difference fluctuation to a balanced state based on the change in the pressure difference between the inside and outside of the thin steel belt, so that the device can operate stably and smoothly. The device can also conveniently increase or decrease the number of boxes to cope with different production scale requirements, can greatly reduce the manufacturing cost of falling film evaporation and concentration equipment of different specifications, and is easy to assemble, use and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the steel belt falling film evaporation concentration device.

[0019] Figure 2 It is a steel belt falling film evaporation concentration device. Figure 1 Schematic diagram of the structure from the other side.

[0020] Figure 3 This is a schematic diagram of the box structure of the steel belt falling film evaporation concentration device.

[0021] Figure 4 It is a steel belt falling film evaporation concentration device. Figure 3 Structural cross-section view.

[0022] Figure 5 It is a steel belt falling film evaporation concentration device. Figure 4 A is an enlarged view of the structure.

[0023] Figure 6 It is a steel belt falling film evaporation concentration device. Figure 4 Front view of .

[0024] Figure 7 It is a steel belt falling film evaporation concentration device. Figure 3 Structural anatomy diagram.

[0025] Figure 8 It is a steel belt falling film evaporation concentration device. Figure 7 Schematic diagram of the structure from another perspective.

[0026] Fig. 9 This is a cross-sectional view of the distribution box structure of the steel belt falling film evaporation concentration device.

[0027] Fig.10 This is a structural cross-sectional view of the pressure balance component of the steel belt falling film evaporation concentration device.

[0028] Fig.11 It is a steel belt falling film evaporation concentration device. Fig.10 A magnified view of the structure of B.

[0029] In the figure: 100, box body; 101, thin steel belt; 102, distribution box; 103, rotating shaft; 104, steam pipe one; 105, steam pipe two; 106, evaporation pipe; 107, feed pipe; 108, discharge pipe; 109, solenoid valve; 110, cylinder; 111, piston; 112, end cover; 113, steel pipe; 114, sliding cover; 115, adapter; 100a, slide groove; 100b, sealing strip; 102a, distribution hole; 103a, input shaft; 103b, shaft seal; 103c, pulley; 113a, notch. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] Example 1, reference Figure 1 to Figure 11, which is the first embodiment of the present invention, and provides a steel belt type falling film evaporation concentration device, which can achieve the effect of continuous and efficient evaporation concentration with a relatively simple structure and a small equipment volume, and comprises a horizontally arranged box 100, a thin steel belt 101 is arranged in the box 100, the top of the thin steel belt 101 is horizontal, and a scattering box 102 is sleeved in the thin steel belt 101 along its width direction, and the scattering boxes 102 are evenly distributed along the length direction of the thin steel belt 101, one end of the scattering box 102 is sealed and the other end is open, and a scattering hole 102a is opened on the side wall of the scattering box 102, and the open end of the scattering box 102 is connected to the side wall of the box 100. The wall is sealed and fixedly plugged in, the bottom of the thin steel belt 101 is arranged in a wave shape along the outer wall of the distribution box 102, and the thin steel belt 101 is sleeved with a rotating shaft 103 at the turning point, and the edge of the thin steel belt 101 is sealed and slidably connected with the inner wall of the box body 100; a steam pipe 104 is arranged on the side of the opening of the distribution box 102 outside the box body 100, and a steam pipe 2 105 and an evaporation pipe 106 are arranged on the other side of the box body 100, the steam pipe 104 and the steam pipe 2 105 both penetrate the side wall of the box body 100 and are connected with the inside of the distribution box 102, and the evaporation pipe 106 is connected with the box body 100 between the outer wall of the thin steel belt 101 and the inner wall of the box body 100. An input shaft 103a is arranged along the axial direction at one end of the rotating shaft 103, and the input shaft 103a extends outside the housing 100, and shaft seals 103b are arranged between the input shaft 103a and the inner wall and the outer wall of the housing 100. A motor is arranged at one end of the housing 100, and the output shaft of the motor and the input shaft 103a are both provided with pulleys 103c, and the pulleys 103c are connected by belts.

[0032] Specifically, the box 100 is rectangular, the box 100 is stacked in the vertical direction, and the boxes 100 are connected in parallel. A feed pipe 107 and a discharge pipe 108 are respectively provided on both sides of the box 100. The feed pipe 107 and the discharge pipe 108 are connected to the box 100 between the outer wall of the thin steel strip 101 and the inner wall of the box 100, and the discharge pipe 108 is connected to the bottom edge of the box 100. Solenoid valves 109 are provided between the boxes 100, the angle between the top surface and one side of the distribution box 102 is ninety degrees, and the distribution holes 102a are distributed on the vertical wall and the inclined wall of the distribution box 102, and the inner walls on both sides of the box 100 are matched with the thin steel strip 101 to open a slide groove 100a, the edge of the thin steel strip 101 is slidably connected to the slide groove 100a, and sealing strips 100b are provided on both sides of the edge of the thin steel strip 101 in the slide groove 100a.

[0033] The principle and advantages of the device are further explained in combination with the existing technology: the existing horizontal tube falling film evaporation concentration equipment mainly relies on the high-density arrangement of steam pipes with smaller diameters in the horizontal tank body to increase the heating contact area, while the vertical tube falling film evaporation concentration equipment needs to rely on a higher tower height so that the high-salt wastewater has sufficient evaporation time during the downstream process. During the production of the former, a large number of steam pipes in the tank rely on welding and nondestructive testing, while the latter is larger in size and usually needs to be installed outdoors.

[0034] The present invention mainly proposes a structure that can continuously circulate and generate a high-salt wastewater film for efficient evaporation and concentration. The structure mainly relies on the wavy structure at the bottom of a thin steel belt 101 in a box body 100. The peaks and valleys of the wavy part are in contact with the waste liquid at the bottom of the box body 100. As the thin steel belt 101 continuously rotates around the roller, the waste liquid is brought out of the liquid surface by the thin steel belt 101 due to adhesion and other reasons, and a thin water film is formed on the bottom surface of the thin steel belt 101. The thin steel belt 101 exchanges heat with the high-temperature steam circulating inside the thin steel belt 101, thereby rapidly evaporating and concentrating. The thin steel belt 101 continuously circulates, and the waste liquid in the box body 100 is continuously concentrated until it is discharged after the concentration reaches the standard.

[0035] To achieve the above purpose, the device also has the following technical details: First, reference Figure 6 The wavy inner wall at the bottom of the thin steel strip 101 is parallel to the vertical wall and the inclined wall of the distribution box 102. Figure 6 Taking the perspective as an example, the running direction of the thin steel belt 101 is that the thin steel belt 101 runs along with the clockwise rotation of the rotating shaft 103, which makes the high-salt wastewater dipped at the bottom of the thin steel belt 101 move obliquely upward, so that the gravity of the high-salt wastewater in the opposite direction of the movement direction of the thin steel belt 101 (locally, specifically the inclined part of the thin steel belt 101) is reduced, so that the thin steel belt 101 can bring out a larger area of ​​water film from the high-salt wastewater at the bottom of the box 100, thereby improving the working efficiency of the equipment.

[0036] Second, reference Figure 8 and Fig. 9 The high-temperature steam enters the distribution box 102 through the steam pipe 104, and the distribution holes 102a on the distribution box 102 preferentially distribute the high-temperature steam flow to the wavy bottom of the thin steel strip 101, thereby optimizing the heat exchange efficiency of the water film evaporation. Then, the high-temperature steam flows out of the box 100 through the steam pipe 2 105.

[0037] Third, reference Figure 7 and Figure 8The edge of the thin steel strip 101 is sealed by the slide groove 100a on the inner wall of the box 100 and the sealing strip 100b in the slide groove 100a, so that a sealed space for circulating high-temperature steam is formed between the thin steel strip 101 and the inner walls on both sides of the box 100. However, in this structure, in order to reduce the friction resistance of the thin steel strip 101, in addition to using a circular cross-section, the sealing strip 100b has a low extrusion force on the edge of the thin steel strip 101. In order to ensure the effectiveness of the seal, the thin steel strip 101 must be The pressure inside and outside is kept balanced. When the pressure difference between the inside and outside spaces of the thin steel strip 101 is small enough, the sealing pressure requirement of the sealing strip will be reduced accordingly to a level that does not affect the operation of the thin steel strip 101. Therefore, the device connects the steam pipe 104 of the internal distribution box 102 of the thin steel strip 101, and connects the evaporation pipe 106 between the outer wall of the thin steel strip 101 and the box body 100. A pressure balance component is added between the two to automatically adjust the pressure difference between the inside and outside of the thin steel strip 101 in real time. For the specific working principle of the pressure balance component, please refer to Example 2.

[0038] In summary, the thin steel belt 101 in the device box 100 has a wavy bottom structure. Through the continuous operation of the thin steel belt 101, the waste liquid adheres to the surface of the thin steel belt 101 to form a thin water film, and optimizes the heat exchange with the high-temperature steam in the flow path inside the thin steel belt 101, thereby continuously and quickly evaporating and concentrating.

[0039] Example 2, reference Figure 1 , Fig.10 and Fig.11 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a pressure balancing component of a steel belt type falling film evaporation concentration device, which solves the sealing problem between the edge of the thin steel belt 101 and the box body 100 during operation. It includes: a pressure balancing component is arranged at the top of the box body 100, which includes a cylinder 110, and end covers 112 are sealed at both ends of the cylinder 110. A piston 111 is sealingly and slidably connected in the cylinder 110, and both ends of the piston 111 are coaxially connected with a steel pipe 113, the steel pipe 113 passes through the end cover 112 and is sealingly and slidably sleeved with the end cover 112, the end of the steel pipe 113 away from the piston 111 passes through a sliding cover 114 fixedly connected, and the end of the steel pipe 113 away from the piston 111 is also sealed and plugged with a transfer pipe head 115.

[0040] Specifically, the adapter connector 115 is Z-shaped, and the interfaces at both ends of the adapter connector 115 are circular, the middle section of the adapter connector 115 is rectangular, and the interface at one end of the adapter connector 115 away from the piston 111 is vertically downward, and the interface at the other end of the adapter connector 115 is vertically upward, and the middle section of the adapter connector 115 is horizontally arranged, the steel pipe 113 is connected to the top of the sliding cover 114, and the bottom surface of the sliding cover 114 slides in contact with the inner bottom surface of the adapter connector 115, the adapter connector 115 and the sliding cover 114 are symmetrically arranged on both sides of the box body 100, the two groups of bottom interfaces of the adapter connector 115 are respectively connected to the steam pipe 104 and the evaporation pipe 106, and the peripheral wall of the steel pipe 113 connected to the piston 111 is provided with a slot 113a, and the slot 113a connects the adapter connector 115, the steel pipe 113 and the cylinder 110.

[0041] Since the two ends of the piston 111 in the cylinder 110 are connected to the steam pipe 1 and the evaporation pipe 106 respectively through the steel pipe 113, the pressure of the high-temperature steam and the pressure generated when the high-salt wastewater evaporates directly act on both sides of the piston 111. When a pressure difference occurs between the two pressures, the piston 111 is pushed to move in the cylinder 110. The movement of the piston 111 drives the movement of the steel pipe 113, and the movement of the steel pipe 113 drives the movement of the sliding cover 114. For example, when the pressure of the steam pipe 1 is higher than that of the evaporation pipe 106, since the steam pipe 104 is directly connected to the internal space of the thin steel strip 101, it can be considered that the internal space of the thin steel strip 101 is also pressurized accordingly. At this time, the piston 111 is in Under the action of the pressure difference, it moves toward the evaporation tube 106, so that the sliding cover 114 in the adapter pipe joint 115 connected to the evaporation tube 106 moves toward the tube opening to cover part of the tube opening, thereby reducing the flow of the evaporation tube 106 (or directly closing it to reduce the flow of the evaporation tube 106 to zero). The evaporated gas cannot be discharged in time, which increases the pressure between the outer wall of the thin steel strip 101 and the inner wall of the box body 100, thereby reducing the pressure difference between the steam tube 1 and the evaporation tube 106, that is, the pressure difference between the inside and outside of the thin steel strip 101 is balanced in real time. When the pressure difference is very low, the sealing strip 100b can meet the sealing requirement with a lower extrusion force, thereby reducing the friction between the sealing strip 100b and the moving thin steel strip 101.

[0042] The rest of the structure is the same as that of Example 1.

[0043] In summary, the structure of the pressure balancing component is very simple and easy to obtain, and is an indispensable part of the normal operation of the present invention. By adjusting the pressure difference fluctuation to a balanced state based on the change of the pressure difference between the inside and outside of the thin steel strip 101, the device can operate stably and smoothly.

[0044] Example 3, reference Figure 1 and Figure 2, which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides an example of stacking boxes 100 of a steel belt type falling film evaporation concentration device. The device can easily increase or decrease the number of boxes 100 to meet different production scale requirements, can greatly reduce the manufacturing cost of falling film evaporation concentration equipment of different specifications, and is easy to assemble, use and maintain.

[0045] The rest of the structure is the same as that of Example 2.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A steel belt falling film evaporation concentration device, characterized in that: It comprises a horizontally arranged box (100), wherein a thin steel belt (101) is arranged in the box (100), the top of the thin steel belt (101) is horizontal, a scattering box (102) is sleeved in the thin steel belt (101) along its width direction, and the scattering boxes (102) are evenly distributed along the length direction of the thin steel belt (101), one end of the scattering box (102) is sealed and the other end is open, a scattering hole (102a) is opened on the side wall of the scattering box (102), and the open end of the scattering box (102) is sealed and fixedly plugged with the side wall of the box (100), the bottom of the thin steel belt (101) is arranged in a wave shape along the outer wall of the scattering box (102), and the thin steel belt (101) is sleeved with a rotating shaft (103) at the turning point, and the edge of the thin steel belt (101) is sealed and slidably connected to the inner wall of the box (100); A steam pipe 1 (104) is provided on one side of the opening of the distribution box (102) outside the box (100), and a steam pipe 2 (105) and an evaporation pipe (106) are provided on the other side of the box (100); the steam pipe 1 (104) and the steam pipe 2 (105) both penetrate the side wall of the box (100) and communicate with the inside of the distribution box (102); the evaporation pipe (106) and the box (100) are communicated between the outer wall of the thin steel strip (101) and the inner wall of the box (100); A pressure balancing assembly is provided at the top of the box body (100), comprising a cylinder (110), end covers (112) being sealed at both ends of the cylinder (110), a piston (111) being sealed and slidably connected inside the cylinder (110), and both ends of the piston (111) being coaxially connected to a steel pipe (113), the steel pipe (113) passing through the end cover (112) and being sealed and slidably sleeved with the end cover (112), one end of the steel pipe (113) away from the piston (111) passing through a sliding cover (114) being fixedly connected, and one end of the steel pipe (113) away from the piston (111) being sealed and plugged with a transfer pipe connector (115).

2. The steel belt falling film evaporation concentration device according to claim 1, characterized in that: The box body (100) is rectangular in shape. The box bodies (100) are stacked in a vertical direction and connected in parallel. A feed pipe (107) and a discharge pipe (108) are respectively provided on both sides of the box body (100). The feed pipe (107) and the discharge pipe (108) are both connected to the box body (100) between the outer wall of the thin steel strip (101) and the inner wall of the box body (100), and the discharge pipe (108) is connected to the bottom edge of the box body (100). Solenoid valves (109) are provided between the feed pipe (107) and the box body (100), and between the discharge pipe (108) and the box body (100).

3. The steel belt falling film evaporation concentration device according to claim 2, characterized in that: The angle between the top surface and one side of the distribution box (102) is ninety degrees, and the distribution holes (102a) are distributed on the vertical wall and the inclined wall of the distribution box (102).

4. The steel belt falling film evaporation concentration device according to claim 3, characterized in that: The inner walls on both sides of the box body (100) are matched with the thin steel strip (101) to form a sliding groove (100a), the edge of the thin steel strip (101) is slidably connected to the sliding groove (100a), and sealing strips (100b) are provided on both sides of the edge of the thin steel strip (101) in the sliding groove (100a).

5. The steel belt falling film evaporation concentration device according to claim 4, characterized in that: The adapter tube (115) is Z-shaped, and the interfaces at both ends of the adapter tube (115) are circular, the middle section of the adapter tube (115) is rectangular, and the interface at one end of the adapter tube (115) away from the piston (111) is vertically downward, the interface at the other end of the adapter tube (115) is vertically upward, and the middle section of the adapter tube (115) is arranged horizontally.

6. The steel belt falling film evaporation concentration device according to claim 5, characterized in that: The steel pipe (113) is connected to the top of the sliding cover (114), and the bottom surface of the sliding cover (114) slides in contact with the inner bottom surface of the adapter tube (115), and the adapter tube (115) and the sliding cover (114) are symmetrically arranged on both sides of the box body (100).

7. The steel belt falling film evaporation concentration device according to claim 6, characterized in that: The bottom interfaces of the two groups of adapter pipes (115) are respectively connected to the steam pipe 1 (104) and the evaporation pipe (106), and a notch (113a) is provided on the peripheral wall of the steel pipe (113) connected to one end of the piston (111), and the notch (113a) is connected to the adapter pipe (115), the steel pipe (113) and the cylinder (110).

8. The steel belt falling film evaporation concentration device according to claim 7, characterized in that: An input shaft (103a) is arranged at one end of the rotating shaft (103) along its axial direction, and the input shaft (103a) extends outside the casing (100), and shaft seals (103b) are arranged between the input shaft (103a) and the inner wall and outer wall of the casing (100).

9. The steel belt falling film evaporation concentration device according to claim 8, characterized in that: A motor is provided at one end of the box body (100), and the output shaft and the input shaft (103a) of the motor are both provided with pulleys (103c), and the pulleys (103c) are connected by belts.

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