Protection assembly for external circulation evaporation preheater

Abstract

The utility model belongs to the technical field of external circulation evaporation pre-heaters, and particularly relates to a protection assembly for an external circulation evaporation pre-heater, which comprises an evaporation pre-heater body, a support frame and a filter box, the support frame is fixedly arranged on the surface of the evaporation pre-heater body, and the filter box is fixedly arranged at the top end of the support frame. A filtering mechanism is arranged in the filtering box, and a stress buffering mechanism is arranged at the top end of the evaporation preheater body. According to the protection assembly for the external circulation evaporation preheater, the filtering mechanism is arranged, after materials enter the filtering box from the first feeding pipe, the materials firstly pass through the coarse filter screen, and large particles are intercepted. Then, the materials enter a middle filter screen, and particles with medium particle sizes are further removed. And finally, tiny particle impurities are filtered out through a fine filter screen, so that the materials entering the evaporation preheater are relatively pure, and the abrasion to internal parts of the evaporation preheater is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of external circulation evaporation preheater, concretely is a kind of protection assembly for external circulation evaporation preheater. BACKGROUND

[0002] External circulation evaporation preheater is a key equipment in evaporation system, and its core role is to preheat the material before entering the evaporator to improve the efficiency of the entire evaporation process and reduce energy consumption. It works based on heat exchange principle, using steam or other high-temperature heat source to exchange heat with the material to be treated. Usually, high-temperature heat source (such as steam) flows outside the heating pipe of the preheater, and the material flows inside the heating pipe. Heat is transferred from the high-temperature heat source to the material through the pipe wall, raising the temperature of the material. Due to the use of external circulation mode, after the material is heated in the preheater, part of it is evaporated, and the gas-liquid mixture leaves the preheater and enters the separator. The non-evaporated liquid separated out is sent back to the preheater inlet by the circulating pump again, mixed with the newly entered cold material, and heated again to form a cycle. This cycle process can fully utilize the heat of the heat source and improve the preheating effect of the material.

[0003] Currently, the external circulation evaporation preheater is inconvenient to disassemble and assemble, and is easily impacted by external forces, has poor stability, and is inconvenient to adjust the installation height according to the installation environment.

[0004] As disclosed in Chinese patent CN216703369U, a kind of double-effect external circulation evaporation preheater convenient to disassemble, its technical scheme points are: including evaporation preheater body and the bottom plate for installing the evaporation preheater body, the upper surface of the bottom plate is installed with multiple groups of symmetrically distributed spring buffer components, the spring buffer component is installed with the frame, the evaporation preheater body is installed in the frame, multiple first locking screws are threadedly connected on the frame, one end of the first locking screw is connected to the evaporation preheater body, the frame and the bottom plate are both installed with first hinged blocks, the installation of evaporation preheater body is facilitated by the frame, the evaporation preheater body is firmly fixed in the frame by the multiple first locking screws, facilitating the disassembly and assembly of the evaporation preheater body, and the hydraulic telescopic rod installed on the first hinged block is beneficial to improve the stability of the frame installation.

[0005] However, in actual operation, external circulation evaporation preheater faces many potential damage factors, such as: the material may contain solid particles, impurities, etc. During the circulation process, these substances can cause wear and tear to the preheater's pipes, heat exchange surfaces, etc. After a long period of operation, the pipes may become thin and leak, and the heat exchange efficiency may decrease.

[0006] To this end, we propose a protective assembly for the outer cycle evaporation preheater to solve the above problems. Utility model content

[0007] The utility model discloses a protective assembly for the outer cycle evaporation preheater to solve the problems raised in the background art.

[0008] To achieve the above object, the utility model provides the following technical scheme: a protective assembly for the outer cycle evaporation preheater, including evaporation preheater body, support frame and filter box, the support frame fixed mounting is in the evaporation preheater body surface, the filter box fixed mounting is in the support frame top, the filter box inside is provided with filter mechanism, and the evaporation preheater body top is provided with stress buffer mechanism.

[0009] The filter mechanism includes primary buffer tank, buffer tank import, installation frame, coarse filter screen, buffer tank export, secondary buffer tank, middle filter screen, tertiary buffer tank, fine filter screen and filter box export, and the primary buffer tank, secondary buffer tank and tertiary buffer tank are installed in filter box inside in proper order, and the function of buffer tank is to stabilize filter pressure, prevents the filter effect from being unstable due to pressure fluctuation, when material enters buffer tank from filter screen, can temporarily store mixed solution due to the volume effect of buffer tank, so that liquid pressure is balanced, the buffer tank import is respectively set up on the surface of primary buffer tank, secondary buffer tank and tertiary buffer tank, the buffer tank export is respectively set up on the surface of primary buffer tank, secondary buffer tank and tertiary buffer tank, the installation frame is respectively installed on the surface of primary buffer tank, secondary buffer tank and tertiary buffer tank, the coarse filter screen is installed in the inner wall of installation frame on the surface of primary buffer tank, the middle filter screen is installed in the inner wall of installation frame on the surface of secondary buffer tank, and the fine filter screen is installed in the inner wall of installation frame on the surface of tertiary buffer tank.

[0010] Preferably, the buffer tank import is distributed on the upper position of the surface of primary buffer tank, secondary buffer tank and tertiary buffer tank, can utilize the gravity effect of material, makes material better dispersion and buffering when entering buffer tank body, and the buffer tank export is distributed on the lower position of the other surface of primary buffer tank, secondary buffer tank and tertiary buffer tank, guarantees that propolis in buffer tank body can smoothly flow out under the action of self gravity or slight pressure difference.

[0011] Preferably, the installation frame is distributed at the inlet of the buffer tank, the coarse filter screen has a larger filter hole diameter than the medium filter screen, the coarse filter screen is made of stainless steel wire mesh, has larger mesh holes, and can intercept impurities with a particle size greater than 5 mm, the medium filter screen has a larger filter hole diameter than the fine filter screen, the medium filter screen uses a sintered metal filter element, and the pore structure thereof can filter out impurities with a particle size between 1-5 mm, the fine filter screen uses a high-precision ceramic filter element, and can effectively intercept small particle impurities with a particle size less than 1 mm, and the coarse filter screen, the medium filter screen and the fine filter screen are provided with a handle at the top end.

[0012] Preferably, the filter box is provided on the surface with a first feeding pipe, the back of the filter box is provided with a filter box outlet, the filter box outlet is communicated with the buffer tank outlet of the three-stage buffer tank, the top of the filter box is provided with a cover plate, and the surface of the cover plate is provided with a handle.

[0013] Preferably, the filter box is provided on the back with a connecting pipe, the connecting pipe is distributed at the filter box outlet, the inner wall of the connecting pipe is provided with a rotating rod, the outer surface of the rotating rod is provided with a baffle, one end of the rotating rod penetrating through the inner wall of the connecting pipe is provided with a rotating ring, and the opening and closing of the baffle is driven by rotating the rotating ring to control the outflow of the material.

[0014] Preferably, the filter box is provided on the side with a blowdown pipe, the blowdown pipe is provided inside with an adjusting valve, and the blowdown pipe corresponds to the space in the filter box separated by the first-stage buffer tank, the second-stage buffer tank and the three-stage buffer tank. When the impurities intercepted by the filter layer reach a certain amount, the impurities can be discharged and cleaned through the control of the adjusting valve.

[0015] Preferably, the stress buffering mechanism comprises a connecting flange, a rubber pad, an extension column, a spring, a second feeding pipe and a corrugated pipe, the connecting flange is installed at the opening of the connecting pipe, the rubber pad is installed on the surface of the connecting flange, the second feeding pipe is installed on the surface of the connecting flange, the extension column is installed on the surface of the second feeding pipe, the extension column has good energy absorption characteristics, can further absorb energy when the corrugated pipe is stressed, and enhances the buffering effect, the spring is installed on the surface of the second feeding pipe to provide certain elastic support force and enhance the buffering effect of the corrugated pipe, and the corrugated pipe is installed on the surface of the connecting flange.

[0016] Preferably, the connecting flanges are respectively arranged at the openings of the connecting pipe and the second feeding pipe, the rubber pad is distributed between the two connecting flanges to seal and further buffer stress, the corrugated pipe is sleeved on the outer surface of the second feeding pipe, the corrugated pipe has good flexibility, can absorb axial and radial displacement caused by temperature and pressure changes, thereby relieving thermal stress and mechanical stress, and the other end of the second feeding pipe is installed on the surface of the evaporation preheater body.

[0017] Compared with the prior art, the utility model has the advantages of

[0018] 1. The protection assembly for the external circulation evaporation preheater, through the filter mechanism, the material enters the filter box from the no. 1 feeding pipe, first passes through the coarse filter screen, and the larger particles are intercepted, then the material enters the medium filter screen, and the medium particle size particles are further removed, finally the fine filter screen filters out the tiny particle impurities, ensures that the material entering the evaporation preheater is relatively pure, reduces the abrasion to the internal components of the evaporation preheater, when the impurities intercepted by the filter screen reach a certain amount, can be discharged and cleaned through the blowdown opening arranged on the side of the filter box.

[0019] 2. The protection assembly for the external circulation evaporation preheater, through the stress buffer mechanism, when the temperature and pressure change in the running process of the evaporation preheater, the corrugated pipe can stretch or bend correspondingly with the stretching or deformation of the no. 2 feeding pipe, the spring provides elastic support inside, the telescopic column can further absorb energy, enhances the buffering effect, the rubber pad prevents leakage between the connecting flanges and absorbs part of the stress, effectively reduces the stress borne by the key parts, avoids the problems such as deformation and crack caused by stress concentration. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the appearance structure schematic view of the utility model;

[0021] Figure 2 It is the filter mechanism structure schematic view of the utility model;

[0022] Figure 3 It is the stress buffer mechanism structure schematic view of the utility model;

[0023] Figure 4 It is the overhead structure schematic view of the utility model.

[0024] In the drawing: 101, evaporation preheater body;102, support frame;201, filter box;202, primary buffer tank;203, buffer tank inlet;204, mounting frame;205, coarse filter screen;206, handle;207, buffer tank outlet;208, secondary buffer tank;209, medium filter screen;210, tertiary buffer tank;211, fine filter screen;212, filter box outlet;213, blowdown opening;214, blowdown pipe;215, regulating valve;216, no. 1 feeding pipe;217, cover plate;218, handle;301, connecting pipe;302, connecting flange;303, rubber pad;304, telescopic column;305, spring;306, no. 2 feeding pipe;307, corrugated pipe;308, rotating rod;309, baffle;310, rotating ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] Embodiment one:

[0027] Based on the fact that the material may contain solid particles, impurities and the like, in the circulating flow process, these substances will cause wear to the pipeline, heat exchange surface and other components of the preheater, and after long time operation, may cause problems such as thinning of the pipeline, leakage and reduction of heat exchange efficiency. The present embodiment provides a protection assembly for an external circulation evaporation preheater, please refer to Figures 1-4 The embodiment provides a protection assembly for an external circulation evaporation preheater. The protection assembly for an external circulation evaporation preheater comprises an evaporation preheater body 101, a support frame 102 and a filter box 201, the support frame 102 is fixedly installed on the surface of the evaporation preheater body 101, the filter box 201 is fixedly installed on the top end of the support frame 102, the filter box 201 is internally provided with a filtering mechanism, and the top end of the evaporation preheater body 101 is provided with a stress buffering mechanism.

[0028] Due to the actual operation process, the material may contain solid particles, impurities, etc., in the circulating flow process, these substances will cause wear and tear to the pipeline, heat exchange surface and other components of the preheater, after a long time of operation, it may cause the pipeline to thin, leak, and the heat exchange efficiency to decrease, therefore, the device is provided with a filtering mechanism, the filtering mechanism includes a first buffer tank 202, a buffer tank inlet 203, a mounting frame 204, a coarse filter screen 205, a buffer tank outlet 207, a second buffer tank 208, a medium filter screen 209, a third buffer tank 210, a fine filter screen 211, a filter box outlet 212, the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210 are installed in the filter box 201 in sequence, the role of the buffer tank is to stabilize the filtering pressure, prevent the filtering effect from being unstable due to pressure fluctuation, when the material enters the buffer tank from the filter screen, due to the volume effect of the buffer tank, it can temporarily store the mixed liquid, so that the liquid pressure is balanced, the buffer tank inlet 203 is respectively arranged on the surface of the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210, the buffer tank inlet 203 is distributed above the surface of the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210, which can utilize the gravity of the material to make the material better dispersed and buffered when entering the buffer tank body, the buffer tank outlet 207 is respectively arranged on the other surface of the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210, the buffer tank outlet 207 is distributed below the other surface of the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210, which ensures that the propolis in the buffer tank body can smoothly flow out under the action of its own gravity or slight pressure difference, the mounting frame 204 is respectively mounted on the surface of the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210, the mounting frame 204 is distributed at the buffer tank inlet 203, the coarse filter screen 205 is mounted on the inner wall of the mounting frame 204 on the surface of the first buffer tank 202, the medium filter screen 209 is mounted on the inner wall of the mounting frame 204 on the surface of the second buffer tank 208, the fine filter screen 211 is mounted on the inner wall of the mounting frame 204 on the surface of the third buffer tank 210, the filter hole diameter of the coarse filter screen 205 is larger than that of the medium filter screen 209, the coarse filter screen 205 is made of stainless steel mesh, the mesh is relatively large, and can intercept impurities with a particle size greater than 5mm, the filter hole diameter of the medium filter screen 209 is larger than that of the fine filter screen 211, the medium filter screen 209 uses a sintered metal filter element, and the pore structure thereof can filter out impurities with a particle size between 1-5mm, the fine filter screen 211 adopts a high-precision ceramic filter element, which can effectively intercept small particle impurities with a particle size less than 1mm, the top end of the coarse filter screen 205, the medium filter screen 209 and the fine filter screen 211 is provided with a handle 206, which facilitates the replacement of the filter screen, a first feeding pipe 216 is mounted on the surface of the filter box 201, a filter box outlet 212 is arranged on the back of the filter box 201, the filter box outlet 212 communicates with the buffer tank outlet 207 of the third buffer tank 210, a cover plate 217 is mounted at the top end of the filter box 201, and a handle 218 is mounted on the surface of the cover plate 217.

[0029] When the impurities intercepted by the filter screen reach a certain amount, a blowdown port 213 is provided on the side of the filter box 201, a blowdown pipe 214 is installed at the blowdown port 213, an adjusting valve 215 is installed inside the blowdown pipe 214, and the blowdown port 213 corresponds to the spaces separated by the first buffer tank 202, the second buffer tank 208 and the third buffer tank 210 in the filter box 201.

[0030] When the filtered material needs to enter the second feeding pipe 306, a connecting pipe 301 is installed on the back of the filter box 201, the connecting pipe 301 is distributed at the filter box outlet 212, a rotating rod 308 is installed on the inner wall of the connecting pipe 301, a baffle 309 is installed on the outer surface of the rotating rod 308, a rotating ring 310 is installed at one end of the rotating rod 308 penetrating through the inner wall of the connecting pipe 301, and the baffle 309 is opened and closed by rotating the rotating ring 310 to control the outflow of the material.

[0031] Example Two:

[0032] Based on Example One, as shown in Figures 1-4 When the temperature and pressure change during the operation of the evaporation preheater body 101, the stress borne by the key parts will increase, deformation and cracking may occur, therefore the device is also provided with a stress buffering mechanism, the stress buffering mechanism includes a connecting flange 302, a rubber pad 303, an extension column 304, a spring 305, a second feeding pipe 306, a corrugated pipe 307, the connecting flange 302 is installed at the opening of the connecting pipe 301, the connecting flange 302 is respectively arranged at the openings of the connecting pipe 301 and the second feeding pipe 306, the rubber pad 303 is installed on the surface of the connecting flange 302, the rubber pad 303 is distributed between the two connecting flanges 302, which plays a sealing and further buffering role, the second feeding pipe 306 is installed on the surface of the connecting flange 302, the extension column 304 is installed on the surface of the second feeding pipe 306, the extension column 304 has good energy absorption characteristics, when the corrugated pipe 307 is stressed, the extension column 304 can further absorb energy to enhance the buffering effect, the spring 305 is installed on the surface of the second feeding pipe 306 to provide certain elastic support force to enhance the buffering effect of the corrugated pipe 307, the corrugated pipe 307 is installed on the surface of the connecting flange 302 and is sleeved on the outer surface of the second feeding pipe 306, the corrugated pipe 307 has good flexibility and can absorb the axial and radial displacement caused by temperature and pressure changes to relieve thermal stress and mechanical stress, and the other end of the second feeding pipe 306 is installed on the surface of the evaporation preheater body 101.

[0033] Working principle: After the material is injected into the filter box 201 through the first feeding pipe 216, the impurities with a particle size greater than 5 mm in the material are filtered out by the coarse filter screen 205 and left in the space between the first buffer tank 202 and the filter box 201, the remaining material enters the first buffer tank 202 through the buffer tank inlet 203, and then flows out from the buffer tank outlet 207 to the space formed by the first buffer tank 202, the second buffer tank 208 and the filter box 201, wherein the impurities with a particle size between 1-5 mm are filtered by the medium filter screen 209 and left in the space formed by the first buffer tank 202, the second buffer tank 208 and the filter box 201, the remaining material enters the space formed by the second buffer tank 208, the third buffer tank 210 and the filter box 201 through the buffer tank inlet 203, wherein the tiny impurity particles with a particle size less than 1 mm are filtered by the fine filter screen 211 and left in the space formed by the second buffer tank 208, the third buffer tank 210 and the filter box 201, the remaining material enters the third buffer tank 210 through the buffer tank inlet 203, and then flows into the connecting pipe 301 through the buffer tank outlet 207, the baffle 309 can be opened and closed by rotating the rotating rod 308 driven by the rotating ring 310, so as to facilitate the discharge of the material, when the impurities intercepted by the filter layer reach a certain amount, the impurities can be discharged and cleaned through the control of the adjusting valve 215, the blockage of the material by the baffle 309 is removed, so that the material flows into the second feeding pipe 306 through the connecting pipe 301, and finally enters the evaporation preheater body 101, when the temperature and pressure change during the operation of the evaporation preheater body 101, the corrugated pipe 307 will stretch or bend accordingly with the stretching or deformation of the second feeding pipe 306, the spring 305 provides elastic support inside, the telescopic column 304 can further absorb energy to enhance the buffering effect, the rubber pad 303 prevents leakage between the connecting flanges 302 and absorbs part of the stress, effectively reducing the stress borne by the key parts, avoiding deformation, cracks and other problems caused by stress concentration.

[0034] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A protection assembly for an external circulation evaporative preheater, comprising an evaporative preheater body (101), a support frame (102) and a filter box (201), wherein the support frame (102) is fixedly installed on the surface of the evaporative preheater body (101), and the filter box (201) is fixedly installed on the top end of the support frame (102), characterized in that: The filter box (201) is internally provided with a filtering mechanism, and the evaporation preheater body (101) is provided at the top end with a stress buffering mechanism; ​ The filtering mechanism comprises a primary buffer tank (202), a buffer tank inlet (203), a mounting frame (204), a coarse filter screen (205), a buffer tank outlet (207), a secondary buffer tank (208), a medium filter screen (209), a tertiary buffer tank (210), a fine filter screen (211), and a filter box outlet (212). The primary buffer tank (202), the secondary buffer tank (208), and the tertiary buffer tank (210) are sequentially mounted inside the filter box (201). The buffer tank inlet (203) is respectively formed on the surface of the primary buffer tank (202), the secondary buffer tank (208), and the tertiary buffer tank (210). The buffer tank outlet (207) is respectively formed on the other surface of the primary buffer tank (202), the secondary buffer tank (208), and the tertiary buffer tank (210). The mounting frame (204) is respectively mounted on the surface of the primary buffer tank (202), the secondary buffer tank (208), and the tertiary buffer tank (210). The coarse filter screen (205) is mounted on the inner wall of the mounting frame (204) on the surface of the primary buffer tank (202). The medium filter screen (209) is mounted on the inner wall of the mounting frame (204) on the surface of the secondary buffer tank (208). The fine filter screen (211) is mounted on the inner wall of the mounting frame (204) on the surface of the tertiary buffer tank (210).

2. A protective assembly for an external recycle evaporative preheater according to claim 1, characterized in that: The buffer tank inlets (203) are distributed above the surfaces of the primary buffer tank (202), the secondary buffer tank (208), and the tertiary buffer tank (210). The buffer tank outlets (207) are distributed below the other surfaces of the primary buffer tank (202), the secondary buffer tank (208), and the tertiary buffer tank (210).

3. A protective assembly for an external recycle evaporative preheater according to claim 1, characterized in that: The mounting frames (204) are distributed at the buffer tank inlets (203). The filter hole diameter of the coarse filter screen (205) is larger than that of the medium filter screen (209), and the filter hole diameter of the medium filter screen (209) is larger than that of the fine filter screen (211). The coarse filter screen (205), the medium filter screen (209), and the fine filter screen (211) are provided at the top end with a handle (206).

4. A protective assembly for an external recycle evaporative preheater according to claim 1, characterized in that: A No. 1 feeding pipe (216) is mounted on the surface of the filter box (201). A filter box outlet (212) is formed on the back of the filter box (201). The filter box outlet (212) is connected to the buffer tank outlet (207) of the tertiary buffer tank (210). A cover plate (217) is mounted at the top end of the filter box (201). A handle (218) is mounted on the surface of the cover plate (217).

5. A protective assembly for an external recycle evaporative preheater according to claim 1, characterized in that: A connecting pipe (301) is mounted on the back of the filter box (201). The connecting pipe (301) is distributed at the filter box outlet (212). A rotating rod (308) is mounted on the inner wall of the connecting pipe (301). A baffle (309) is mounted on the outer surface of the rotating rod (308). A rotating ring (310) is mounted on one end of the rotating rod (308) penetrating through the inner wall of the connecting pipe (301).

6. A protective assembly for an external recycle evaporative preheater according to claim 1, characterized in that: The filter box (201) is provided with a blowdown port (213) on the side, a blowdown pipe (214) is installed at the blowdown port (213), an adjusting valve (215) is installed inside the blowdown pipe (214), and the blowdown port (213) corresponds to the spaces separated by the primary buffer tank (202), the secondary buffer tank (208) and the tertiary buffer tank (210) in the filter box (201).

7. A protective assembly for an external recycle evaporative preheater according to claim 1, characterized in that: The stress buffering mechanism comprises a connecting flange (302), a rubber pad (303), an elastic column (304), a spring (305), a second feeding pipe (306) and a bellows (307), the connecting flange (302) is installed at the opening of the connecting pipe (301), the rubber pad (303) is installed on the surface of the connecting flange (302), the second feeding pipe (306) is installed on the surface of the connecting flange (302), the elastic column (304) is installed on the surface of the second feeding pipe (306), the spring (305) is installed on the surface of the second feeding pipe (306), and the bellows (307) is installed on the surface of the connecting flange (302).

8. A protective assembly for an external recycle evaporative preheater according to claim 7, characterized in that: The connecting flanges (302) are respectively arranged at the openings of the connecting pipe (301) and the second feeding pipe (306), the rubber pad (303) is distributed between the two connecting flanges (302), the bellows (307) is sleeved on the outer surface of the second feeding pipe (306), and the other end of the second feeding pipe (306) is installed on the surface of the evaporation preheater body (101).

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