Low-temperature waste heat recovery steam ejector bottom corrosion prevention device

Abstract

This invention discloses a bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector, including a steam ejector body, anti-corrosion components, and emission components. Flue gas condenses into acid, which falls along an alloy baffle into the bottom silicon carbide lining. The acid accumulates at the bottom of the steam ejector. As the acid increases, a lifting float moves upward, driving a striking rotating plate to oscillate back and forth. This oscillation causes a baffle striking rod to move back and forth, striking the alloy baffle repeatedly. The alloy baffle is located on the top surface of the silicon carbide lining. The acid falls along the alloy baffle into the silicon carbide lining, preventing low-concentration sulfuric acid from seeping into the gaps and corroding the steam ejector body, thus improving its service life. Striking the alloy baffle also prevents some acid from adhering to it for extended periods, thus preventing corrosion and further extending the service life of the steam ejector body.

Description

Technical Field

[0001] This invention relates to the field of equipment corrosion protection technology, and in particular to a bottom corrosion protection device for a low-temperature waste heat recovery steam ejector. Background Technology

[0002] In high-concentration flue gas acid production processes, due to the high concentration of sulfur trioxide entering the absorption tower and the relatively small volume of flue gas, a large circulating acid spray volume is required to avoid excessively high acid concentration at the outlet. However, high spray density leads to increased resistance within the tower and may even cause flooding. Therefore, it is usually necessary to increase the diameter of the absorption tower to increase the circulating acid volume. Using a steam injection pre-reaction device allows low-pressure steam to be injected before the flue gas enters the absorption tower, causing some of the sulfur trioxide to react prematurely to form sulfuric acid, reducing the absorption load of the absorption tower, decreasing the concentration gradient of the primary sprayed acid along the packing layer, thereby reducing the spray volume, narrowing the tower diameter, and lowering the power consumption of the circulating acid pump. Furthermore, pre-injected steam can reduce the water load on the diluent and improve its operational stability. To ensure thorough mixing of steam and flue gas, the steam injection chamber is usually located at the top of the pipeline, with the flue gas heating the steam in a co-current manner. The flue is arranged in a U-shape and enters the bottom of the waste heat recovery (HRS) tower. However, condensed acid is inevitably produced after the steam and flue gas are mixed.

[0003] To prevent corrosion from high-temperature dilute acid at the bottom, existing technologies often use acid- and temperature-resistant silicon carbide bricks at the bottom of the ejector to extend its service life, and design inclined plates or arc-shaped bottoms to connect to the acid drain port for periodic acid discharge. However, during long-term operation, condensed acid can still seep into the gaps between the ejector and the brick lining through the silicon carbide brick seams, corroding the metal body, leading to flue gas leaks, and affecting environmental protection and safety. Furthermore, manual periodic acid draining is cumbersome and poses safety hazards. Therefore, how to provide a bottom corrosion prevention device for a low-temperature waste heat recovery steam ejector is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One objective of this invention is to prevent condensed acid from entering the gaps between the injector and the brick lining through the joints of silicon carbide bricks, thereby solving the problem in the prior art that condensed acid can still seep into the gaps between the injector and the brick lining through the joints of silicon carbide bricks, corroding the metal body, causing flue gas leakage, and affecting environmental protection and safety.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector, comprising a steam ejector body, an anti-corrosion component, and a discharge component, wherein a silicon carbide lining is fixedly installed at the bottom inside the steam ejector body. The corrosion-resistant component includes an alloy baffle, a baffle striking rod, a striking rotating plate, and a lifting floating plate. The alloy baffle is located above the silicon carbide lining, the striking rotating plate is located below the alloy baffle, and baffle striking rods are fixedly installed at both ends of the striking rotating plate. The lifting floating plate is disposed inside the steam ejector body. When acidic liquid appears inside the steam ejector body, the lifting float can move up and down according to the change in liquid level. When the lifting float moves vertically, it can cause the striking rotating plate to swing back and forth, thereby causing the baffle striking rod to strike the alloy baffle. The discharge assembly includes an acid discharge pipe, a fixed sealing plate, a rotating sealing plate, and a liquid seal tank. The acid discharge pipe is fixedly installed at the bottom of the steam ejector body, the liquid seal tank is fixedly installed at the bottom of the acid discharge pipe, the fixed sealing plate is fixedly installed at the top of the acid discharge pipe, and the rotating sealing plate is rotatably installed at the top of the fixed sealing plate. The top surface of the fixed sealing plate has a fixed liquid discharge port, and the top surface of the rotating sealing plate has a rotating liquid discharge port. When the lifting float moves upward, it causes the rotating sealing plate to rotate, aligning the fixed drain port with the rotating drain port and connecting the acid drain pipe; when the lifting float moves downward, it causes the rotating sealing plate to rotate, intersecting the fixed drain port with the rotating drain port and closing the acid drain pipe.

[0006] Preferably, the anti-corrosion assembly further includes a striking rotating shaft, a striking spring, a striking rotating circular plate, a driving circular plate, a sealing connecting pipe, a lifting linkage rope, a linkage rotating shaft, and a return spring. A rotating mounting block is fixedly installed on the outer wall of the steam ejector body. The striking rotating shaft passes through the rotating mounting block and is fixedly connected to the striking rotating plate, and the striking rotating shaft is rotatably connected to the rotating mounting block. The striking spring is fixedly sleeved on the striking rotating shaft and fixedly connected to the rotating mounting block. The outer wall of the steam ejector body is fixedly installed with... The device has a fixed mounting plate, one end of the linkage rotating shaft passes through the fixed mounting plate and is rotatably connected to the fixed mounting plate, the driving circular plate is fixedly connected to one end of the linkage rotating shaft, the reset spring is fixedly sleeved on the linkage rotating shaft and fixedly connected to the fixed mounting plate, the sealing connecting pipe is fixedly installed to the steam ejector body and one end of the sealing connecting pipe passes through the steam ejector body, one end of the lifting linkage rope is fixedly connected to the linkage rotating shaft and the other end slides through the sealing connecting pipe and is fixedly connected to the lifting float.

[0007] Preferably, the corrosion-resistant component further includes extrusion protrusions and pressure-receiving moving blocks. A plurality of extrusion protrusions are fixedly installed around the driving circular plate, and the extrusion protrusions are evenly distributed around the circumference. The pressure-receiving moving blocks are fixedly installed around the striking rotating circular plate.

[0008] Preferably, the emission assembly further includes a rotating support rod, a lifting lever, a closing ring plate, a closing stop block, a connecting ring plate, and a connecting stop block. The rotating support rod is fixedly installed on the top surface of the rotating sealing plate. The lifting lever is fixedly connected to the lifting float plate. The closing ring plate is vertically slidably sleeved on the rotating support rod. The closing stop block is fixedly connected to the closing ring plate. The connecting ring plate is vertically slidably sleeved on the rotating support rod. The connecting stop block is fixedly connected to the connecting ring plate. The connecting ring plate is located above the closing ring plate.

[0009] Preferably, the emission assembly further includes a shut-off linkage plate, a shut-off adjustment rod, a connecting linkage plate, a connecting adjustment rod, and an adjustment mounting plate. The adjustment mounting plate is fixedly connected to the acid discharge pipe. The shut-off linkage plate is rotatably engaged with the shut-off ring plate. The connecting linkage plate is rotatably engaged with the connecting ring plate. The shut-off adjustment rod slides through the adjustment mounting plate and the steam ejector body and is fixedly connected to the shut-off linkage plate. The connecting adjustment rod slides through the adjustment mounting plate and the steam ejector body and is fixedly connected to the connecting linkage plate.

[0010] Preferably, the discharge assembly further includes a clamping mounting block and a fixing unit. The fixing unit includes a compression spring, a movable fixing block, a compression wedge, and a fixing rotating rod. The clamping mounting block is fixedly installed on the bottom surface of the adjusting mounting plate. The clamping mounting block has two clamping mounting slots. The connecting adjusting rod and the closing adjusting rod pass through the clamping mounting slots. The compression wedge is rotatably installed in the clamping mounting slot. The movable fixing blocks are provided on both sides of the compression wedge. The movable fixing blocks are slidably installed in the clamping mounting slot. One end of the compression spring is fixedly connected to the movable fixing block, and the other end is fixedly connected to the inner wall of the clamping mounting slot. The fixing rotating rod passes through the clamping mounting block and is fixedly installed with the compression wedge.

[0011] Preferably, the extrusion protrusion is hemispherical, and the two sides of the pressure-bearing moving block that contact the extrusion protrusion are arc surfaces.

[0012] Preferably, the alloy baffle is welded to the inner wall of the steam ejector and is inclined downward at 45°.

[0013] Preferably, the top surface of the closing block is arc-shaped, the bottom surface of the connecting block is arc-shaped, and the end of the lifting lever near the rotating support is hemispherical.

[0014] Preferably, the acid drain pipe and the liquid seal tank are made of steel lined with F material, the acid drain pipe is inserted into the liquid seal tank to form a liquid seal, and the liquid seal tank is provided with an overflow port at the top.

[0015] The beneficial effects of this invention are: When the steam ejector is working, the flue gas condenses into acid and falls along the alloy baffle into the silicon carbide lining at the bottom. The acid accumulates at the bottom of the steam ejector. As the amount of acid increases, the lifting float moves upward. During the upward movement of the lifting float, it drives the striking rotating plate to swing back and forth. The swinging of the striking rotating plate drives the baffle striking rod to move back and forth. During the movement of the striking rod, it strikes the alloy baffle. The alloy baffle is set on the top surface of the silicon carbide lining. The acid falls along the alloy baffle into the silicon carbide lining, eliminating the gaps formed between the ejector body and silicon carbide due to the difference in thermal expansion coefficients. This prevents low-concentration sulfuric acid from seeping into the gaps and corroding the steam ejector body, thus improving the service life of the steam ejector body. Striking the alloy baffle also prevents some acid from adhering to the alloy baffle for a long time and corroding it, thus improving the service life of the steam ejector body. When the lifting float moves upward, it triggers the lifting lever, which in turn presses against the connecting block. This pressing action causes the connecting block to move, rotating the connecting ring plate. The rotating ring plate then rotates the rotating support rod, which in turn rotates the rotating sealing plate, aligning the fixed drain port with the rotating drain port and opening the acid discharge pipe. Conversely, when the lifting float moves downward, the lifting lever presses against the closing block, causing it to move. This movement rotates the closing ring plate, which in turn rotates the rotating support rod. The rotating support rod then rotates the sealing rotating plate, causing the fixed drain port and the rotating drain port to overlap, thus closing the acid discharge pipe. This automatic drainage of accumulated acid within the silicon carbide lining replaces manual periodic acid drainage, reducing operational intensity and eliminating safety hazards. Furthermore, when the acid discharge pipe needs to be closed, the acid in the liquid-sealed tank can be processed during the operation of the steam ejector, improving work efficiency. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is one of the partial structural schematic diagrams provided in the embodiments of the present invention; Figure 3 This is a second partial structural schematic diagram provided in an embodiment of the present invention; Figure 4 This is the third partial structural schematic diagram provided for an embodiment of the present invention; Figure 5 This is the fourth partial structural schematic diagram provided for an embodiment of the present invention; Figure 6 Fifth partial structural schematic diagram provided for an embodiment of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A; Figure 8 This is the sixth partial structural schematic diagram provided for an embodiment of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of the structure at point B; Figure 10 For the present invention Figure 8 Enlarged view of the structure at point C; Figure 11 This is the seventh partial structural schematic diagram provided for an embodiment of the present invention.

[0017] In the diagram: 1. Steam ejector body; 101. Silicon carbide lining; 2. Corrosion-resistant components; 201. Alloy baffle; 202. Baffle striking rod; 203. Striking rotating plate; 204. Lifting float; 205. Striking rotating shaft; 206. Striking spring; 207. Striking rotating circular plate; 208. Drive circular plate; 209. Sealing connecting pipe; 210. Lifting linkage rope; 211. Linkage rotating shaft; 212. Reset spring; 213. Extrusion protrusion; 214. Pressurized moving block; 3. Discharge assembly; 301. Acid discharge pipe; 302. 303. Fixed sealing plate; 304. Rotating sealing plate; 305. Liquid sealing tank; 306. Rotating support rod; 307. Lifting lever; 308. Closing ring plate; 309. Closing stop block; 310. Connecting ring plate; 311. Connecting stop block; 312. Closing linkage plate; 313. Closing adjusting rod; 314. Connecting adjusting rod; 315. Adjusting mounting plate; 316. Clamping mounting block; 31. Fixed unit; 3101. Compression spring; 3102. Moving fixed block; 3103. Compression wedge block; 3104. Fixed rotating rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0019] refer to Figures 1-11 The present invention provides a bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector, including a steam ejector body 1, an anti-corrosion component 2 and an exhaust component 3. A silicon carbide lining 101 is fixedly installed at the bottom inside the steam ejector body 1. The anti-corrosion component 2 includes an alloy baffle 201, a baffle striking rod 202, a striking rotating plate 203, and a lifting float 204. The alloy baffle 201 is located above the silicon carbide lining 101, the striking rotating plate 203 is located below the alloy baffle 201, the baffle striking rod 202 is fixedly installed at both ends of the striking rotating plate 203, and the lifting float 204 is located inside the steam ejector body 1. When acidic liquid appears inside the steam ejector body 1, the lifting float 204 can move up and down according to the change in liquid level. When the lifting float 204 moves vertically, it can cause the striking rotating plate 203 to swing back and forth, thereby causing the baffle striking rod 202 to strike the alloy baffle 201. The discharge assembly 3 includes an acid discharge pipe 301, a fixed sealing plate 302, a rotating sealing plate 303, and a liquid seal tank 304. The acid discharge pipe 301 is fixedly installed at the bottom of the steam ejector body 1, the liquid seal tank 304 is fixedly installed at the bottom of the acid discharge pipe 301, the fixed sealing plate 302 is fixedly installed at the top of the acid discharge pipe 301, and the rotating sealing plate 303 is rotatably installed at the top of the fixed sealing plate 302. The top surface of the fixed sealing plate 302 is provided with a fixed liquid discharge port, and the top surface of the rotating sealing plate 303 is provided with a rotating liquid discharge port. When the lifting float 204 moves upward, it can cause the rotating sealing plate 303 to rotate, so that the fixed drain port and the rotating drain port coincide, and the acid drain pipe 301 is connected; when the lifting float 204 moves downward, it can cause the rotating sealing plate 303 to rotate, so that the fixed drain port and the rotating drain port are staggered, and the acid drain pipe 301 is closed. The alloy baffle 201 is welded to the inner wall of the steam ejector and is inclined downward at 45°.

[0020] In this embodiment, the alloy baffle 201 is welded to the top surface of the silicon carbide lining 101. When the steam ejector is working, the flue gas condenses into acid liquid and falls along the alloy baffle 201 into the bottom of the silicon carbide lining 101. The acid liquid accumulates at the bottom of the steam ejector. As the amount of acid liquid increases, the lifting float 204 moves upward. During the upward movement of the lifting float 204, it can drive the striking rotating plate 203 to swing back and forth. The swinging of the striking rotating plate 203 drives the baffle striking rod 202 to move back and forth. During the movement of the striking rod, the alloy baffle 201 is subjected to pressure. 1. The alloy baffle 201 is set on the top surface of the silicon carbide liner 101. The acid liquid falls into the silicon carbide liner 101 along the alloy baffle 201, eliminating the gap formed between the ejector body and silicon carbide due to the difference in thermal expansion coefficients, preventing low concentration sulfuric acid from seeping into the gap and corroding the steam ejector body 1, thus improving the service life of the steam ejector body 1. The alloy baffle 201 is also struck to prevent some acid liquid from adhering to the alloy baffle 201 for a long time and corroding the alloy baffle 201, thus improving the service life of the steam ejector body 1. When the lifting float 204 moves upward to a certain height, it can cause the rotating sealing plate 303 to rotate, so that the fixed drain port and the rotating drain port coincide, connecting the acid discharge pipe 301 and allowing the acid to rise and enter the liquid seal tank 304. When the lifting float 204 moves downward to a certain height, it can cause the rotating sealing plate 303 to rotate, so that the fixed drain port and the rotating drain port intersect, closing the acid discharge pipe 301 and ending the acid discharge.

[0021] refer to Figures 1-11 The anti-corrosion component 2 also includes a striking rotating shaft 205, a striking spring 206, a striking rotating circular plate 207, a driving circular plate 208, a sealing connecting pipe 209, a lifting linkage rope 210, a linkage rotating shaft 211, and a reset spring 212. A rotating mounting block is fixedly installed on the outer wall of the steam ejector body 1. The striking rotating shaft 205 passes through the rotating mounting block and is fixedly connected to the striking rotating plate 203, and the striking rotating shaft 205 is rotatably connected to the rotating mounting block. The striking spring 206 is fixedly sleeved on the striking rotating shaft 205 and is fixedly connected to the rotating mounting block. A fixed mounting plate is fixedly installed on the outer wall of the steam ejector body 1. One end of the linkage rotating shaft 211 passes through the fixed mounting plate and is rotatably connected to the fixed mounting plate. The driving circular plate 207 and the linkage rotating shaft 208 are connected to the rotating rotating shaft 209. One end of the 11 is fixedly connected, and the return spring 212 is fixedly sleeved on the linkage rotating shaft 211. The return spring 212 is fixedly connected to the fixed mounting plate. The sealing connecting pipe 209 is fixedly installed to the steam ejector body 1, and one end of the sealing connecting pipe 209 passes through the steam ejector body 1. One end of the lifting linkage rope 210 is fixedly connected to the linkage rotating shaft 211, and the other end slides through the sealing connecting pipe 209 and is fixedly connected to the lifting float 204. There are pressure protrusions and pressure moving blocks 214. Several pressure protrusions 213 are fixedly installed around the driving circular plate 208. The pressure protrusions 213 are evenly distributed around the circumference. The pressure moving blocks 214 are fixedly installed around the striking rotating circular plate 207. The pressure protrusions 213 are hemispherical, and the two sides of the pressure moving block 214 that contact the pressure protrusions 213 are arc surfaces.

[0022] In this embodiment, when the lifting float 204 moves upward, the reset spring 212 resets, causing the linkage rotating shaft 211 to rotate. The linkage rotating shaft 211 winds up the lifting linkage rope 210. When the lifting float 204 moves downward, it pulls the lifting linkage rope 210, which in turn causes the linkage rotating shaft 211 to rotate. When the linkage rotating shaft 211 rotates, it drives the drive circular plate 208 to rotate, which in turn drives the pressing protrusion 213 to move. During the process, the pressure-receiving moving block 214 is squeezed, causing it to move. The movement of the pressure-receiving moving block 214 drives the striking rotating plate 207 to rotate, which in turn drives the striking rotating plate 203 to rotate. When the squeezing protrusion 213 releases contact with the pressure-receiving moving block 214, the striking spring 206 resets, the striking rotating plate 207 rotates, and the pressure-receiving moving block 214 moves back to its original position. Multiple squeezing protrusions 213 intermittently squeeze the pressure-receiving moving block 214, causing the striking rotating plate 203 to achieve a reciprocating oscillating effect.

[0023] refer to Figures 1-11The emission assembly 3 also includes a rotating support rod 305, a lifting lever 306, a closing ring plate 307, a closing stop block 308, a connecting ring plate 309, and a connecting stop block 310. The rotating support rod 305 is fixedly installed on the top surface of the rotating sealing plate 303. The lifting lever 306 is fixedly connected to the lifting float plate 204. The closing ring plate 307 is vertically slidably sleeved on the rotating support rod 305. The closing stop block 308 is fixedly connected to the closing ring plate 307. The connecting ring plate 309 is vertically slidably sleeved on the rotating support rod 305. The connecting stop block 310 is connected to the connecting ring plate 309. The fixed connection, with the connecting ring plate 309 located above the closing ring plate 307; the discharge assembly 3 also includes a closing linkage plate 311, a closing adjustment rod 312, a connecting linkage plate 313, a connecting adjustment rod 314, and an adjustment mounting plate 315. The adjustment mounting plate 315 is fixedly connected to the acid discharge pipe 301. The closing linkage plate 311 is rotatably engaged with the closing ring plate 307, and the connecting linkage plate 313 is rotatably engaged with the connecting ring plate 309. The closing adjustment rod 312 slides through the adjustment mounting plate 315, and the steam ejector body 1 is fixedly connected to the closing linkage plate 311. The entire rod 314 slides through the adjusting mounting plate 315 and is fixedly connected to the steam ejector body 1 and the connecting linkage plate 313; the discharge assembly 3 also includes a clamping mounting block 316 and a fixing unit 31. The fixing unit 31 includes a compression spring 3101, a movable fixing block 3102, a compression wedge 3103, and a fixed rotating rod 3104. The clamping mounting block 316 is fixedly installed on the bottom surface of the adjusting mounting plate 315. The clamping mounting block 316 has two clamping mounting slots. The connecting adjusting rod 314 and the closing adjusting rod 312 pass through the clamping mounting slots, and the compression wedge... Block 3103 is rotatably installed in the clamping mounting slot. Movable fixing blocks 3102 are provided on both sides of the extrusion wedge block 3103. The movable fixing blocks 3102 are slidably installed in the clamping mounting slot. One end of the extrusion spring 3101 is fixedly connected to the movable fixing block 3102, and the other end is fixedly connected to the inner wall of the clamping mounting slot. The fixed rotating rod 3104 passes through the clamping mounting block 316 and is fixedly installed with the extrusion wedge block 3103. The top surface of the closing stop block 308 is arc-shaped, the bottom surface of the connecting stop block 310 is arc-shaped, and the end of the lifting lever 306 near the rotating support is hemispherical.

[0024] In this embodiment, before the steam ejector operates, the fixed rotating rod 3104 of the fixed unit 31 corresponding to the connecting adjusting rod 314 is manually rotated. The rotation of the fixed rotating rod 3104 drives the squeezing wedge block 3103 to rotate, and the squeezing wedge block 3103 squeezes the moving fixed block 3102, causing the moving fixed block 3102 to move and release the fixation of the connecting adjusting rod 314. The connecting adjusting rod 314 moves vertically, and the movement of the connecting adjusting rod 314 drives the connecting linkage plate 313 to move vertically. The connecting linkage plate 313 drives the connecting ring plate 309 along the rotating support. The rod 305 moves vertically to adjust the position of the connecting block 310. By adjusting the position of the connecting block 310, the highest position of the lifting float 204 can be set, thereby setting the amount of acid liquid accumulated at the bottom of the steam ejector to prevent excessive accumulation of acid liquid from causing corrosion inside the steam ejector. After the adjustment is completed, the fixed rotating rod 3104 is rotated to release the squeezing wedge 3103 from squeezing the moving fixed block 3102. The squeezing spring 3101 returns to its original position, driving the moving fixed block 3102 to move and squeezing and fixing the connecting adjusting rod 314. The closing adjustment rod 312 is manually rotated to correspond to the fixed rotating rod 3104 of the fixed unit 31. The rotation of the fixed rotating rod 3104 drives the squeezing wedge block 3103 to rotate. The squeezing wedge block 3103 squeezes the moving fixed block 3102, causing the moving fixed block 3102 to move and release the fixation of the closing adjustment rod 312. The closing adjustment rod 312 moves vertically, which drives the closing linkage plate 311 to move vertically. The closing linkage plate 311 drives the closing ring plate 307 to move vertically along the rotating support rod 305, adjusting the position of the closing stop block 308, thereby setting the timing of closing the acid discharge pipe 301. When the lifting float 204 moves upward, the lifting lever 306 moves. During the movement of the lifting lever 306, it presses against the connecting block 310, causing the connecting block 310 to move. The movement of the connecting block 310 drives the connecting ring plate 309 to rotate. The rotation of the connecting ring plate 309 causes the rotating support rod 305 to rotate, which in turn causes the rotating sealing plate 303 to rotate, making the fixed drain port coincide with the rotating drain port, thus connecting the acid drain pipe 301. When the lifting float 204 moves downward, the lifting lever 306 presses against the closing block 308 during the downward movement. The closing block 308 moves under pressure, causing the closing ring plate 307 to rotate. The rotation of the closing ring plate 307 causes the rotating support rod 305 to rotate. Rotating the support rod 305 drives the sealing rotating plate to rotate, causing the fixed drain port and the rotating drain port to intersect, thus closing the acid drain pipe 301. This automatically drains the accumulated acid in the silicon carbide lining 101, replacing manual periodic acid draining, reducing operational intensity, and eliminating safety hazards. When the acid drain pipe 301 needs to be closed, the acid in the liquid seal tank 304 can be treated during the operation of the steam ejector, improving work efficiency.

[0025] refer to Figures 1-11 The acid discharge pipe 301 and the liquid seal tank 304 are made of F4 steel lined. The acid discharge pipe 301 is inserted into the liquid seal tank 304 to form a liquid seal. The liquid seal tank 304 is equipped with an overflow port at the top.

[0026] In this embodiment, the acid discharge pipe 301 and the liquid seal tank 304 are made of F4 steel-lined material, which effectively prevents corrosion from dilute acid. The acid discharge pipe 301 is inserted into the liquid seal tank 304 to form a liquid seal, which can prevent flue gas leakage. The liquid seal tank 304 is equipped with an overflow port at the top, which can automatically discharge excess acid.

[0027] Working principle: Before the steam ejector operates, the connecting adjusting rod 314 is manually rotated to correspond to the fixed rotating rod 3104 of the fixed unit 31. The rotation of the fixed rotating rod 3104 drives the squeezing wedge block 3103 to rotate, squeezing the moving fixed block 3102, causing the moving fixed block 3102 to move and release the fixation of the connecting adjusting rod 314, allowing the connecting adjusting rod 314 to move vertically. The movement of the connecting adjusting rod 314 drives the connecting linkage plate 313 to move vertically, and the connecting linkage plate 313 drives the connecting ring plate 309 along the rotating support rod. 305 moves vertically to adjust the position of the connecting block 310. By adjusting the position of the connecting block 310, the highest position of the lifting float 204 can be set, thereby setting the amount of acid accumulated at the bottom of the steam ejector to prevent excessive acid accumulation from causing corrosion inside the steam ejector. After adjustment, rotate the fixed rotating rod 3104 to release the squeezing wedge 3103 from squeezing the moving fixed block 3102. The squeezing spring 3101 resets and drives the moving fixed block 3102 to move, squeezing and fixing the connecting adjusting rod 314. The closing adjustment rod 312 is manually rotated to correspond to the fixed rotating rod 3104 of the fixed unit 31. The rotation of the fixed rotating rod 3104 drives the squeezing wedge block 3103 to rotate. The squeezing wedge block 3103 squeezes the moving fixed block 3102, causing the moving fixed block 3102 to move and release the fixation of the closing adjustment rod 312. The closing adjustment rod 312 moves vertically, which drives the closing linkage plate 311 to move vertically. The closing linkage plate 311 drives the closing ring plate 307 to move vertically along the rotating support rod 305, adjusting the position of the closing stop block 308, thereby setting the timing of closing the acid discharge pipe 301. When the steam ejector is working, the flue gas condenses into acid liquid and falls along the alloy baffle 201 into the silicon carbide lining 101 at the bottom. The acid liquid accumulates at the bottom of the steam ejector. As the amount of acid liquid increases, the lifting float 204 moves upward. When the lifting float 204 moves upward, the reset spring 212 resets and drives the linkage rotating shaft 211 to rotate. The linkage rotating shaft 211 winds up the lifting linkage rope 210. When the lifting float 204 moves downward, it pulls the lifting linkage rope 210 to move. The movement of the lifting linkage rope 210 drives the linkage rotating shaft 211 to rotate. When the linkage rotating shaft 211 rotates, it drives the drive circular plate 208 to rotate. The rotation of the drive circular plate 208 drives the pressing protrusion 213 to move. During the movement of the pressing protrusion 213, it presses the pressure-receiving moving block 214, causing the pressure-receiving moving block 214 to move. The movement of the pressure-receiving moving block 214 drives the striking rotating circular plate 207 to rotate. The rotation of the striking rotating circular plate 207 drives the striking rotating circular plate 207 to rotate. When the moving plate 203 rotates, and the pressing protrusion 213 releases contact with the pressure-bearing moving block 214, the striking spring 206 resets, the striking rotating plate 207 rotates, and the pressure-bearing moving block 214 moves and resets. Multiple pressing protrusions 213 intermittently press the pressure-bearing moving block 214, causing the striking rotating plate 203 to oscillate back and forth. The oscillation of the striking rotating plate 203 drives the baffle striking rod 202 to oscillate back and forth. During the movement of the striking rod, it impacts the alloy baffle 201. The alloy baffle 201 is set on the top surface of the silicon carbide liner 101 by repeated tapping. The acid liquid falls into the silicon carbide liner 101 along the alloy baffle 201, eliminating the gaps formed between the ejector body and silicon carbide due to the difference in thermal expansion coefficients. This prevents low-concentration sulfuric acid from seeping into the gaps and corroding the steam ejector body 1. Tapping the alloy baffle 201 also prevents some acid liquid from adhering to the alloy baffle 201 for a long time and corroding the alloy baffle 201, thereby improving the service life of the steam ejector body 1. When the lifting float 204 moves upward, the lifting lever 306 moves. During the movement of the lifting lever 306, it presses against the connecting block 310, causing the connecting block 310 to move. The movement of the connecting block 310 drives the connecting ring plate 309 to rotate. The rotation of the connecting ring plate 309 causes the rotating support rod 305 to rotate, which in turn causes the rotating sealing plate 303 to rotate, making the fixed drain port coincide with the rotating drain port, thus connecting the acid drain pipe 301. When the lifting float 204 moves downward, the lifting lever 306 presses against the closing block 308 during the downward movement. The closing block 308 moves under pressure, causing the closing ring plate 307 to rotate. The rotation of the closing ring plate 307 causes the rotating support rod 305 to rotate. Rotating the support rod 305 drives the sealing rotating plate to rotate, causing the fixed drain port and the rotating drain port to intersect, thus closing the acid drain pipe 301. This automatically drains the accumulated acid in the silicon carbide lining 101, replacing manual periodic acid draining, reducing operational intensity, and eliminating safety hazards. When the acid drain pipe 301 needs to be closed, the acid in the liquid seal tank 304 can be treated during the operation of the steam ejector, improving work efficiency.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector, characterized in that, It includes a steam ejector body (1), a corrosion protection component (2), and a discharge component (3). The bottom of the steam ejector body (1) is fixedly installed with a silicon carbide liner (101). The corrosion-resistant component (2) includes an alloy baffle (201), a baffle striking rod (202), a striking rotating plate (203), and a lifting float (204). The alloy baffle (201) is located above the silicon carbide lining (101), the striking rotating plate (203) is located below the alloy baffle (201), and the baffle striking rod (202) is fixedly installed at both ends of the striking rotating plate (203). The lifting float (204) is disposed inside the steam ejector body (1). When acidic liquid appears inside the steam ejector body (1), the lifting float (204) can move up and down according to the change of liquid level. When the lifting float (204) moves vertically, it can make the striking rotating plate (203) swing back and forth, so that the baffle striking rod (202) strikes the alloy baffle (201). The discharge assembly (3) includes an acid discharge pipe (301), a fixed sealing plate (302), a rotating sealing plate (303), and a liquid seal tank (304). The acid discharge pipe (301) is fixedly installed at the bottom of the steam ejector body (1), the liquid seal tank (304) is fixedly installed at the bottom of the acid discharge pipe (301), the fixed sealing plate (302) is fixedly installed at the top of the acid discharge pipe (301), and the rotating sealing plate (303) is rotatably installed at the top of the fixed sealing plate (302). The top surface of the fixed sealing plate (302) is provided with a fixed drain port, and the top surface of the rotating sealing plate (303) is provided with a rotating drain port. When the lifting float (204) moves upward, it can cause the rotating sealing plate (303) to rotate, so that the fixed drain port and the rotating drain port coincide, and the acid drain pipe (301) is connected; when the lifting float (204) moves downward, it can cause the rotating sealing plate (303) to rotate, so that the fixed drain port and the rotating drain port are staggered, and the acid drain pipe (301) is closed.

2. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 1, characterized in that, The corrosion-resistant component (2) further includes a striking rotating shaft (205), a striking spring (206), a striking rotating circular plate (207), a driving circular plate (208), a sealing connecting pipe (209), a lifting linkage rope (210), a linkage rotating shaft (211), and a reset spring (212). A rotating mounting block is fixedly installed on the outer wall of the steam ejector body (1). The striking rotating shaft (205) passes through the rotating mounting block and is fixedly connected to the striking rotating plate (203). The striking rotating shaft (205) is rotatably connected to the rotating mounting block. The striking spring (206) is fixedly sleeved on the striking rotating shaft (205). The striking spring (206) is fixedly connected to the rotating mounting block. The outer wall of the steam ejector body (1) A fixed mounting plate is fixedly installed. One end of the linkage rotating shaft (211) passes through the fixed mounting plate and is rotatably connected to the fixed mounting plate. The driving circular plate (208) is fixedly connected to one end of the linkage rotating shaft (211). The reset spring (212) is fixedly sleeved on the linkage rotating shaft (211) and fixedly connected to the fixed mounting plate. The sealing connecting pipe (209) is fixedly installed to the steam ejector body (1), and one end of the sealing connecting pipe (209) passes through the steam ejector body (1). One end of the lifting linkage rope (210) is fixedly connected to the linkage rotating shaft (211), and the other end slides through the sealing connecting pipe (209) and is fixedly connected to the lifting float (204).

3. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 2, characterized in that, The corrosion-resistant component (2) further includes extrusion protrusions (213) and pressure-bearing moving blocks (214). A plurality of extrusion protrusions (213) are fixedly installed around the drive circular plate (208). The extrusion protrusions (213) are evenly distributed around the circumference. The pressure-bearing moving blocks (214) are fixedly installed around the striking rotating circular plate (207).

4. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 1, characterized in that, The emission assembly (3) further includes a rotating support rod (305), a lifting lever (306), a closing ring plate (307), a closing stop (308), a connecting ring plate (309), and a connecting stop (310). The rotating support rod (305) is fixedly installed on the top surface of the rotating sealing plate (303). The lifting lever (306) is fixedly connected to the lifting float (204). The closing ring plate (307) is vertically slidably sleeved on the rotating support rod (305). The closing stop (308) is fixedly connected to the closing ring plate (307). The connecting ring plate (309) is vertically slidably sleeved on the rotating support rod (305). The connecting stop (310) is fixedly connected to the connecting ring plate (309). The connecting ring plate (309) is located above the closing ring plate (307).

5. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 4, characterized in that, The emission assembly (3) further includes a shut-off linkage plate (311), a shut-off adjustment rod (312), a connecting linkage plate (313), a connecting adjustment rod (314), and an adjustment mounting plate (315). The adjustment mounting plate (315) is fixedly connected to the acid discharge pipe (301). The shut-off linkage plate (311) is rotatably engaged with the shut-off ring plate (307). The connecting linkage plate (313) is rotatably engaged with the connecting ring plate (309). The shut-off adjustment rod (312) slides through the adjustment mounting plate (315) and the steam ejector body (1) and is fixedly connected to the shut-off linkage plate (311). The connecting adjustment rod (314) slides through the adjustment mounting plate (315) and the steam ejector body (1) and is fixedly connected to the connecting linkage plate (313).

6. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 5, characterized in that, The emission assembly (3) further includes a clamping mounting block (316) and a fixing unit (31). The fixing unit (31) includes a compression spring (3101), a movable fixing block (3102), a compression wedge (3103), and a fixing rotating rod (3104). The clamping mounting block (316) is fixedly mounted on the bottom surface of the adjusting mounting plate (315). The clamping mounting block (316) has two clamping mounting slots. The connecting adjusting rod (314) and the closing adjusting rod (312) pass through the clamping mounting slots. The extrusion wedge (3103) is rotatably installed in the clamping mounting slot. The extrusion wedge (3103) is provided with movable fixing blocks (3102) on both sides. The movable fixing blocks (3102) are slidably installed in the clamping mounting slot. One end of the extrusion spring (3101) is fixedly connected to the movable fixing block (3102), and the other end is fixedly connected to the inner wall of the clamping mounting slot. The fixed rotating rod (3104) passes through the clamping mounting block (316) and is fixedly installed with the extrusion wedge (3103).

7. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 3, characterized in that, The extrusion protrusion (213) is hemispherical, and the two sides of the pressure-receiving moving block (214) that contact the extrusion protrusion (213) are arc surfaces.

8. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 1, characterized in that, The alloy baffle (201) is welded to the inner wall of the steam ejector and is inclined downward at 45°.

9. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 6, characterized in that, The top surface of the closing stop (308) is arc-shaped, the bottom surface of the connecting stop (310) is arc-shaped, and the end of the lifting lever (306) near the rotating support is hemispherical.

10. The bottom anti-corrosion device for a low-temperature waste heat recovery steam ejector according to claim 1, characterized in that, The acid drain pipe (301) and the liquid seal tank (304) are made of F4 steel lined. The acid drain pipe (301) is inserted into the liquid seal tank (304) to form a liquid seal. An overflow port is provided on the upper part of the liquid seal tank (304).

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