Anti-blocking structure of evaporation falling film evaporator suitable for high-viscosity materials

Abstract

The invention discloses a falling film evaporator anti-blocking structure suitable for high-viscosity materials, and relates to the technical field of falling film evaporators.The falling film evaporator anti-blocking structure comprises a shell and a cover plate, three supporting legs are fixedly connected to the bottom of the shell in an annular array mode, and a material inlet, a steam inlet and a first concentrated solution outlet are formed in the right side of the outer surface of the shell; a drain outlet and a condensed water outlet are formed in the left side of the outer surface of the shell, and a concentrated solution outlet II is formed in the bottom of the shell. The possibility that solid substances are accumulated above the barrel is prevented through the arrangement of the conical surface, when liquid materials exist in the upper cavity, the liquid materials conveniently enter the barrel through the arrangement of the inlet, after entering, the liquid materials conveniently enter the barrel through the arrangement of the heating pipe, and the solid substances are effectively prevented from entering through the arrangement of the filter screen, so that the solid substances are effectively prevented from entering the barrel. In addition, the inlet is formed in the lower portion of the barrel and used in cooperation with the filter screen, so that solid matter is not prone to entering, and the anti-blocking performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of falling film evaporators, in particular to a falling film evaporator anti-blocking structure suitable for high viscosity materials. BACKGROUND

[0002] Evaporators are a class of devices that can heat the feed liquid to cause the water in the feed liquid to vaporize and separate, thereby concentrating the feed liquid. Evaporators are widely used in chemical industry, food industry, pharmaceutical industry and other fields. Common evaporators include climbing film evaporators, falling film evaporators, and scraper type evaporators. Unlike the other two types of evaporators, the feed liquid of the falling film evaporator is added from the top of the evaporator, and under the action of gravity, it forms a film along the wall of the heating pipe and descends, and in the process, it evaporates and thickens, and at the bottom, it obtains concentrated liquid. It can evaporate materials with high concentration and large viscosity (for example, in the range of 0.05 to 0.45 Ns / m), and heat-sensitive materials. Because the heating pipe has a relatively small diameter, during the concentration process, the precipitated solid material can easily cause the heating pipe to be blocked.

[0003] According to the patent publication number: CN214415616U, including a shell, and a cavity located inside the shell; The cavity is provided with an upper partition plate and a lower partition plate, the upper partition plate and the lower partition plate divide the cavity into relatively independent upper cavity, heating cavity and lower cavity, the two ends of the heating pipe respectively penetrate the upper partition plate and the lower partition plate, and the upper cavity and the lower cavity are communicated. In the prior art, the upper end of the heating pipe is flush with the upper surface of the partition plate. When the amount of feed liquid entering the upper cavity is not controlled well, the feed liquid in the upper cavity can be quickly evaporated, and the crystallization at the bottom of the upper cavity can be formed and caked, and the caked crystallization can fall into the heating pipe to form a blockage. In the present application, the upper end of the heating pipe protrudes from the upper surface of the partition plate. The upper cavity can always have feed liquid present, even if the caked crystallization occurs, the crystallization will only exist at the bottom of the upper cavity and cannot fall into the heating pipe, thereby effectively reducing the blockage probability of the heating pipe and prolonging the service life of the falling film evaporator.

[0004] The existing technology has the following problems:

[0005] In the above publication number, the anti-blocking structure is described as "the upper end of the heating pipe protrudes from the upper surface of the partition plate", which realizes the anti-blocking function. Through the arrangement of this structure, the blocking performance is relatively single, and the end surface of the heating pipe is always in an open state. After the upper cavity is evaporated, the crystallization at the bottom is formed and caked. When the liquid material needs to be added again, the crystallization at the bottom of the upper cavity will be washed and submerged in the protruding part of the heating pipe. After washing, the crystallization blocks move back and forth in the liquid material, which can easily cause the crystallization blocks to enter the inside of the heating pipe and cause blockage, causing inconvenience in use.

[0006] Therefore, we need a suitable for high viscosity material evaporation falling film evaporator anti-blocking structure to solve the above problems. SUMMARY

[0007] The application provides a suitable for high viscosity material evaporation falling film evaporator anti-blocking structure to solve the problems in the background art.

[0008] To solve the above technical problems, the technical scheme adopted by the application is:

[0009] A suitable for high viscosity material evaporation falling film evaporator anti-blocking structure, comprising a shell and a cover plate, the bottom of the shell is fixedly connected with three support legs in an annular array, the right side of the outer surface of the shell is provided with a material inlet, a steam inlet and a concentrated liquid outlet one, the left side of the outer surface of the shell is provided with a blowdown outlet and a condensed water outlet, and the bottom of the shell is provided with a concentrated liquid outlet two.

[0010] The upper and lower interiors of the shell are fixedly connected with partition plates, the upper partition plate is in an inclined state, the upper surfaces of the upper and lower partition plates are fixedly connected with a plurality of heating pipes in an annular array, the outer surfaces of the plurality of heating pipes are provided with anti-blocking structures above, the anti-blocking structures each comprise a cylinder and a mounting ring, and the inner sides of the mounting rings are respectively threadedly connected with the outer surfaces of the heating pipes.

[0011] Further improvement of the technical scheme of the application is that: the upper surface of the cylinder is provided with a conical surface.

[0012] Further improvement of the technical scheme of the application is that: the inner wall of the cylinder is provided with a fixing ring below, the inner side of the fixing ring is fixedly connected with the outer surface of the mounting ring, the outer surface of the fixing ring and the inner wall of the cylinder below form an entrance, and the inside of the entrance is provided with four fixing blocks in an annular array.

[0013] Further improvement of the technical scheme of the application is that: the outer surfaces of the four fixing blocks are respectively fixedly connected with the inner wall of the cylinder and the outer surface of the fixing ring, and the inner wall below of the entrance is fixedly connected with a filter screen.

[0014] Further improvement of the technical scheme of the application is that: the shape of the filter screen is the same as that of the entrance and is in an annular state.

[0015] Further improvement of the technical scheme of the application is that: the shape of the filter screen is the same as that of the entrance and is in an annular state.

[0016] The further improvement of the technical scheme of the present application is that the upper surface of the cover plate is fixedly connected with a handle, the lower surface of the handle is fixedly connected with a column body, and the outer surface of the column body is threadedly connected with the inner wall of the shell.

[0017] The further improvement of the technical scheme of the present application is that the lower surface of the column body is provided with a sealing ring, the lower surface of the sealing ring is provided with a blocking ring, and the outer surface of the blocking ring is fixedly connected with the inner wall of the shell.

[0018] Due to the adoption of the above technical scheme, the present application has the following technical progress compared with the prior art:

[0019] 1. The present application provides a steam falling film evaporator anti-blocking structure suitable for high viscosity materials, which prevents the accumulation of solid substances above the cylinder by the setting of the conical surface. When there is liquid material inside the upper cavity, the liquid material can enter the inside of the cylinder through the inlet. After entering, it can enter the inside through the setting of the heating pipe. The setting of the filter screen effectively prevents the entry of solid substances. In addition, the cooperation of the inlet set at the lower position of the cylinder and the filter screen makes it difficult for solid substances to enter, thereby improving the anti-blocking performance.

[0020] 2. The present application provides a steam falling film evaporator anti-blocking structure suitable for high viscosity materials, which realizes the opening state of the cover plate by rotating the cover plate. Then, the installation ring can be rotated on the outer surface of the heating pipe due to the action of the fixing block and the fixing ring, so that the anti-blocking structure is separated from the heating pipe, facilitating the disassembly, replacement and cleaning effect of the anti-blocking structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The figure is a structural schematic diagram of the present application;

[0022] Figure 2 The figure is a front cross-sectional structural schematic diagram of the shell of the present application;

[0023] Figure 3 The figure is an exploded structural schematic diagram of the cylinder, the installation ring and the heating pipe of the present application;

[0024] Figure 4 The figure is a front cross-sectional structural schematic diagram of the cylinder of the present application;

[0025] Figure 5 The figure is an exploded structural schematic diagram of the cover plate, the blocking ring and the sealing ring of the present application.

[0026] In the diagram: 1. Outer shell; 11. Upper cavity; 12. Heating cavity; 13. Lower cavity; 14. Divider plate; 15. Heating tube; 16. Anti-clogging structure; 161. Cylinder; 162. Mounting ring; 163. Conical surface; 164. Fixing ring; 165. Fixing block; 166. Inlet; 167. Filter screen; 2. Cover plate; 21. Handle; 22. Column; 23. Blocking ring; 24. Sealing ring; 3. Material inlet; 4. Drain outlet; 5. Steam inlet; 6. Condensate outlet; 7. Concentrate outlet one; 8. Concentrate outlet two. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] Example 1: As Figures 1 to 5 As shown, this invention provides an anti-clogging structure for a falling film evaporator suitable for high-viscosity materials, comprising a shell 1 and a cover plate 2. Three support legs are fixed in a circular array at the bottom of the shell 1 to ensure stable placement of the equipment. On the right side of the outer surface of the shell 1, a material inlet 3, a steam inlet 5, and a concentrate outlet 7 are sequentially arranged; on the left side, a drain outlet 4 and a condensate outlet 6 are arranged; and at the bottom, a second concentrate outlet 8 is provided and equipped with a solenoid valve. The material inlet 3, steam inlet 5, concentrate outlet 7, drain outlet 4, and condensate outlet 6 are rationally positioned, facilitating connection to external pipelines and the installation of valves to realize the input of materials, the introduction of steam, the discharge of concentrate, and the cleaning of condensate and contaminants.

[0029] Inside the outer shell 1, partition plates 14 are fixedly connected to both the upper and lower sides. The upper partition plate 14 is inclined, which helps solid materials to move closer to the drain port 4. Periodically, the bottom of the upper cavity 11 can be cleaned, and the wastewater and solid matter generated during cleaning are discharged from the drain port 4. Several heating tubes 15 are fixedly connected in a ring array on the upper surface of the upper and lower partition plates 14. The heating tubes 15 are used to heat and evaporate the material. The upper cavity 11 is formed between the upper inner wall of the outer shell 1 and the upper surface of the upper partition plate 14. After entering from the material inlet 3, the material first enters the upper cavity 11. A heating chamber 12 is formed between the middle of the outer shell 1 and the opposite surface of the upper and lower partition plates 14. After entering the heating chamber 12, the material is evaporated and concentrated under the action of the heating tubes 15. The lower cavity 13 is formed between the lower inner wall of the outer shell 1 and the lower surface of the lower partition plate 14. Furthermore, the specific working principle of the falling film evaporator is existing technology and will not be elaborated here.

[0030] Example 2: Figures 1 to 5As shown, an anti-clogging structure 16 is provided above the outer surface of several heating tubes 15. The anti-clogging structure 16 includes a cylinder 161 and a mounting ring 162. The inner side of the mounting ring 162 is threaded to the outer surface of the heating tube 15. This connection method facilitates the installation and disassembly of the anti-clogging structure 16, and facilitates the regular cleaning of surface residues or replacement, so as to prevent the risk of clogging of the filter screen 167 in the subsequent structure.

[0031] Each cylinder 161 has a conical surface 163 on its upper surface. The design of the conical surface 163 can prevent the formation of solid material after the liquid evaporates, thus preventing the possibility of accumulation. A fixing ring 164 is set at the lower part of the inner wall of the cylinder 161. The inner side of the fixing ring 164 is fixedly connected to the outer surface of the mounting ring 162. The outer surface of the fixing ring 164 and the lower part of the inner wall of the cylinder 161 form an inlet 166. Four fixing blocks 165 are arranged in a ring array inside the inlet 166. The outer surfaces of the four fixing blocks 165 are fixedly connected to the inner wall of the cylinder 161 and the outer surface of the fixing ring 164, respectively, which plays a role in stabilizing the structure. A filter screen 167 is fixedly connected to the lower inner wall of the inlet 166. The filter screen 167 has the same shape as the inlet 166 and is in a ring shape. The filter screen 167 can effectively block solid substances and prevent them from entering the heating tube 15 and causing blockage, thus ensuring the normal operation and evaporation efficiency of the heating tube 15. The structure makes the inlet 166 located below the cylinder 161 and, in conjunction with the filter screen 167, can improve the performance against blockage. When the amount of liquid is not properly controlled, the upper cavity 11 will quickly evaporate and crystallize at the bottom, forming clumps. After the liquid evaporates, a large amount of liquid material needs to be added. After the added liquid material enters the upper cavity 11, it will flush the crystallized blocks, causing the crystallized blocks to move back and forth in the liquid material. The moved crystallized blocks will not fall into the heating tube 15. At this time, the valve in the pipe installed at the drain port 4 is in the closed state.

[0032] Example 3: Figures 1 to 5 As shown, a handle 21 is fixedly connected to the upper surface of the cover plate 2, and the handle 21 is in a U-shape to facilitate the operator to open and close the cover plate 2. A column 22 is fixedly connected to the lower surface of the handle 21, and the outer surface of the column 22 is threadedly connected to the inner wall of the outer shell 1 to achieve a tight connection between the cover plate 2 and the outer shell 1. A sealing ring 24 is provided on the lower surface of the column 22, and a retaining ring 23 is provided on the lower surface of the sealing ring 24. The sealing ring 24 is placed on the upper surface of the retaining ring 23. This structure facilitates the replacement of the retaining ring 23. The outer surface of the retaining ring 23 is fixedly connected to the inner wall of the outer shell 1. The sealing ring 24, the retaining ring 23, and the column 22 work together to enhance the sealing between the column 22 and the retaining ring 23, so that the cover plate 2 has a sealing effect when closed.

[0033] Through the arrangement of the structure, when in use, the rotating handle 21 drives the cover plate 2, the column 22 and the shell 1 to move out, then the anti-blocking structure 16 is rotated to separate from the heating pipe 15, the anti-blocking structure 16 is disassembled, and the anti-blocking structure 16 is replaced or cleaned, so that the filter screen 167 is prevented from being blocked, and the evaporator is in a shutdown state during disassembly.

[0034] Working principle: when the upper cavity 11 is rapidly evaporated and the bottom crystallization is formed and caked, after the liquid material is added, the liquid material added into the inside of the upper cavity 11 will flush the crystalline block, so that the crystalline block moves back and forth in the liquid material, the end face of the heating pipe 15 is protected through the arrangement of the cylinder 161, and the entering port 166 and the filter screen 167 below the cylinder 161 are arranged, so that the moving crystalline block will not fall into the heating pipe 15. When the anti-blocking structure 16 needs to be cleaned, the operator can open the cover plate 2 through the handle 21, rotate and disassemble the anti-blocking structure 16 from the heating pipe 15, clean and replace the anti-blocking structure 16, and ensure the long-term stable operation of the equipment.

[0035] The above is a detailed description of the present application, but some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the present application are within the protection scope of the present application.

Claims

1. A structure for preventing blocking of a falling film evaporator for high viscosity materials, comprising a housing (1) and a cover plate (2), characterized in that: The bottom of the shell (1) is fixedly connected with three supporting legs, the right side of the outer surface of the shell (1) is provided with a material inlet (3), a steam inlet (5) and a concentrated liquid outlet I (7), the left side of the outer surface of the shell (1) is provided with a blowdown outlet (4) and a condensed water outlet (6), and the bottom of the shell (1) is provided with a concentrated liquid outlet II (8). The upper and lower parts of the inside of the shell (1) are fixedly connected with partition plates (14), the upper partition plate (14) is in an inclined state, the upper surfaces of the upper and lower partition plates (14) are fixedly connected with a plurality of heating pipes (15) in an annular array, the upper surfaces of the plurality of heating pipes (15) are provided with anti-blocking structures (16), the plurality of anti-blocking structures (16) each include a cylinder (161) and a mounting ring (162), and the inner sides of the plurality of mounting rings (162) are respectively threadedly connected with the outer surfaces of the heating pipes (15).

2. A structure for preventing blocking of a falling film evaporator for high viscosity materials according to claim 1, characterized in that: The upper surface of the upper partition plate (14) and the upper surface of the upper partition plate (14) form an upper cavity (11), the middle part of the shell (1) and the opposite surfaces of the upper and lower partition plates (14) form a heating cavity (12), and the lower part of the inner wall of the shell (1) and the lower surface of the lower partition plate (14) form a lower cavity (13).

3. A structure for preventing blocking of a falling film evaporator for high viscosity materials according to claim 1, characterized in that: The upper surfaces of the plurality of cylinders (161) are provided with tapered surfaces (163).

4. A non-blocking structure for falling film evaporator suitable for high viscosity material as claimed in claim 1 wherein: The lower inner walls of the plurality of cylinders (161) are provided with fixing rings (164), the inner sides of the fixing rings (164) are fixedly connected with the outer surfaces of the mounting rings (162), the outer surfaces of the fixing rings (164) and the lower inner walls of the cylinders (161) form inlet openings (166), and the inner annular arrays of the inlet openings (166) are provided with four fixing blocks (165).

5. A structure for preventing blocking of a falling film evaporator for high viscosity materials according to claim 4, characterized in that: The outer surfaces of the four fixing blocks (165) are fixedly connected with the inner walls of the cylinders (161) and the outer surfaces of the fixing rings (164), and the lower inner walls of the inlet openings (166) are fixedly connected with filter screens (167).

6. A structure for preventing blocking of a falling film evaporator for high viscosity materials according to claim 5, characterized in that: The filter screens (167) are in an annular state and have the same shape as the inlet openings (166).

7. A non-blocking structure for falling film evaporator suitable for high viscosity material as claimed in claim 1 wherein: The upper surface of the cover plate (2) is fixedly connected with a handle (21), the lower surface of the handle (21) is fixedly connected with a column body (22), and the outer surface of the column body (22) is threadedly connected with the inner wall of the shell (1).

8. A structure for preventing blocking of a falling film evaporator for high viscosity materials according to claim 7, characterized in that: The lower surface of the column body (22) is provided with a sealing ring (24), the lower surface of the sealing ring (24) is provided with a blocking ring (23), and the outer surface of the blocking ring (23) is fixedly connected with the inner wall of the shell (1).

Images