Low-temperature-level waste heat deep recovery device in sulfuric acid production process

Abstract

The invention provides a low-temperature-level waste heat deep recovery device in the sulfuric acid production process, and belongs to the technical field of sulfuric acid production. The low-temperature-position waste heat deep recovery device in the sulfuric acid production process comprises a high-temperature absorption tower, a filter plate is connected to the interior of a third shell, a cleaning mechanism used for cleaning the filter plate is arranged in the third shell, and a collecting mechanism used for collecting impurities is arranged in the third shell. According to the device, an output shaft of a motor is controlled to rotate, a scraping plate is driven to move downwards, impurities on one side of a filtering plate are scraped off, a steel wire rope is arranged, when the scraping plate moves downwards, a moving plate can be driven to move into a cavity, a through hole can be opened, and the impurities can penetrate through the through hole to enter a collecting box; therefore, the problems that most filter plates of an existing filter mechanism can be cleaned only after being detached, and time and labor are wasted in the process of detaching the filter plates are solved.

Description

Technical Field

[0001] The present application relates to the field of sulfuric acid production, and more specifically, to a device for deep recovery of low-temperature waste heat in a sulfuric acid production process. Background Art

[0002] The production of sulfuric acid mainly includes three processes: combustion of sulfur-containing raw materials, oxidation of sulfur dioxide and absorption of sulfur trioxide. These processes are accompanied by the release of a large amount of chemical energy. Most sulfuric acid production plants recycle the high and medium temperature heat energy generated by the combustion of sulfur-containing raw materials and oxidation of sulfur dioxide as much as possible, and produce steam as a by-product. As for the low temperature heat energy in the sulfur trioxide absorption system, for a long time, except for a few production enterprises using it to heat industrial water and domestic water, it is generally removed with circulating cooling water and wasted.

[0003] In the existing technology, a low-temperature waste heat recovery device is set up to allow the flue gas containing SO3 to enter the high-temperature absorption tower from the conversion process, and come into countercurrent contact with 99% concentrated sulfuric acid. The SO3 is absorbed by the high-temperature sulfuric acid, releasing a large amount of reaction heat. The temperature of the circulating sulfuric acid is raised to 200-220℃, and the heat is transferred to the boiler feed water through a heat exchanger (such as a steam generator) to generate low-pressure steam, thereby deeply recovering the low-temperature waste heat.

[0004] However, the existing low-temperature waste heat deep recovery device in the sulfuric acid production process still has the following shortcomings during use: in the existing flue gas containing SO3, carbon particles or other solid residues may be generated due to incomplete combustion of sulfur or pyrite, so a filtering mechanism must be set up to filter the flue gas. Most of the filter plates of the existing filtering mechanism need to be disassembled before the filter plates can be cleaned, and the process of disassembling the filter plates is time-consuming and labor-intensive. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present application provides a low-temperature waste heat deep recovery device in the sulfuric acid production process, which aims to improve the problem that most of the filter plates of the existing filtering mechanism need to be disassembled before they can be cleaned, and the process of disassembling the filter plates is time-consuming and labor-intensive.

[0006] The present application provides a device for deep recovery of low-temperature waste heat in a sulfuric acid production process, comprising a high-temperature absorption tower, wherein an input end of the high-temperature absorption tower is connected to a second pipe, the other end of the second pipe is connected to a third shell, the input end of the third shell is connected to a first pipe, a filter plate is connected to the interior of the third shell, a cleaning mechanism for cleaning the filter plate is provided inside the third shell, and a collection mechanism for collecting impurities is provided inside the third shell; The cleaning mechanism includes a first shell and a second shell, wherein the first shell and the second shell are symmetrically connected to two sides of the third shell, the interior of the second shell is connected to a vertical rod, and the outer surface of the vertical rod is slidably connected to a slider.

[0007] In a specific embodiment, a motor is connected to the top of the first shell, an output shaft of the motor passes through the first shell and is connected to a screw, and the other end of the screw is rotatably connected to the inside of the first shell.

[0008] In the above implementation process, through the setting of the motor, the output shaft of the motor can be manually controlled to rotate, thereby driving the screw to rotate inside the first housing.

[0009] In a specific embodiment, the outer surface of the screw is threadedly connected to a threaded seat, and the threaded seat is slidably connected to the interior of the first shell.

[0010] In the above implementation process, by providing the threaded seat, when the screw rod rotates, the threaded seat connected with the outer surface thread can be driven to slide up and down inside the first shell.

[0011] In a specific embodiment, a scraper is connected to one side of the threaded seat, the other end of the scraper is connected to one side of the slider, and one side of the scraper is in close contact with one side of the filter plate.

[0012] In the above implementation process, through the setting of the scraper, when the threaded seat moves up and down, the scraper can be driven to move, driving the slider to slide on the surface of the vertical rod. By moving the scraper downward, the impurities intercepted on one side of the filter plate can be cleaned.

[0013] In a specific embodiment, a through hole is formed through the bottom of the third shell.

[0014] In the above implementation process, the scraped impurities can be moved to the interior of the collection box through the through-holes.

[0015] In a specific embodiment, the collection mechanism includes a collection box connected to the bottom of the third shell, and the collection box is arranged directly below the through hole.

[0016] In the above implementation process, impurities can be collected inside the collecting box through the setting of the collecting box, and a discharge port is provided at the bottom of the collecting box. When a large amount of impurities are collected inside the collecting box, the collected impurities can be discharged through the discharge port.

[0017] In a specific embodiment, a cavity is opened inside the third shell, a movable plate is slidably connected inside the cavity, one side of the movable plate is connected to multiple groups of first springs, and the other end of the first spring is connected to the inner wall of the cavity.

[0018] In the above implementation process, through the setting of the movable plate, when the movable plate is forced to move toward the inside of the cavity, the first spring is compressed, and the movable plate gradually moves away from the top of the through hole, so that the through hole can be opened. When the movable plate is not subjected to force, the first spring releases elastic potential energy, drives the movable plate to reset, and moves to the top of the through hole, so as to block the through hole, and prevent the impurities collected inside the collection box from entering the interior of the third shell again when the impurities are not cleaned.

[0019] In a specific embodiment, a plurality of sets of steel cables are connected to one side of the moving plate, and one end of the steel cables passes through the third shell multiple times and is connected to the top of the scraper.

[0020] In the above implementation process, through the setting of the wire rope, when the scraper moves downward, the wire rope can drive the movable plate to move toward the inside of the cavity, so that the through hole is opened, and the scraped impurities can pass through the through hole into the inside of the collection box.

[0021] In a specific embodiment, a break is provided in the middle section of the steel wire rope, both ends of the break are connected to mounting plates, and a second spring is connected between two groups of the mounting plates.

[0022] In the above implementation process, by providing the second spring, the second spring can be stretched as the scraper continues to descend.

[0023] In a specific embodiment, the elastic potential energy of the second spring is greater than the elastic potential energy of the first spring.

[0024] In the above implementation process, the elastic potential energy of the second spring is greater than that of the first spring. After the first spring is fully compressed, the movable plate cannot move inside the cavity, and the through hole is fully opened. Only then can the second spring begin to stretch, so that the scraper can continue to move downward and clean the entire filter plate through the scraper.

[0025] Compared with the prior art, the beneficial effects of the present application are as follows: through the setting of the cleaning mechanism and the collecting mechanism, the output shaft of the motor can be controlled to rotate, driving the scraper to move downward to scrape off the impurities on one side of the filter plate; through the setting of the wire rope, when the scraper moves downward, the movable plate can be driven to move into the cavity, and the through hole can be opened, so that impurities can pass through the through hole into the interior of the collection box and be collected by the collection box, thereby solving the problem that most filter plates of the existing filtering mechanism need to be disassembled before the filter plates can be cleaned, and the process of disassembling the filter plates is time-consuming and labor-intensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of a low-temperature waste heat deep recovery device in a sulfuric acid production process provided by an embodiment of the present application; Figure 2 A schematic diagram of the high-temperature absorption tower structure provided in an embodiment of the present application; Figure 3 A schematic diagram of the first shell structure provided in an embodiment of the present application; Figure 4 A schematic diagram of the filter plate structure provided in an embodiment of the present application; Figure 5 A schematic diagram of the screw structure provided in an embodiment of the present application; Figure 6 A schematic diagram of the cavity structure provided in an embodiment of the present application; Figure 7 A schematic diagram of the steel wire rope structure provided in an embodiment of the present application; Figure 8 A schematic diagram of the second spring structure provided in an embodiment of the present application.

[0028] In the figure: 1. High-temperature absorption tower; 2. Cleaning mechanism; 201. First shell; 202. Second shell; 203. Through hole; 204. Screw; 205. Motor; 206. Threaded seat; 207. Scraper; 208. Slider; 209. Vertical rod; 3. Collecting mechanism; 301. Cavity; 302. Collecting box; 303. First spring; 304. Moving plate; 305. Wire rope; 306. Disconnection point; 307. Mounting plate; 308. Second spring; 4. Third shell; 5. First pipe; 6. Second pipe; 7. Filter plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with 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.

[0030] See also Figure 1 The present application provides a low-temperature waste heat deep recovery device in a sulfuric acid production process, comprising a high-temperature absorption tower 1.

[0031] See also Figure 1 、 Figure 2 and Figure 4 The input end of the high-temperature absorption tower 1 is connected to a second pipe 6, the other end of the second pipe 6 is connected to a third shell 4, the input end of the third shell 4 is connected to a first pipe 5, the interior of the third shell 4 is connected to a filter plate 7, the interior of the third shell 4 is provided with a cleaning mechanism 2 for cleaning the filter plate 7, the interior of the third shell 4 is provided with a collecting mechanism 3 for collecting impurities, the first pipe 5 is connected to a sulfuric acid production device, and the flue gas containing SO3 generated during the production process enters the interior of the third shell 4 through the first pipe 5, is filtered through the filter plate 7, and then enters the interior of the high-temperature absorption tower 1 through the second pipe 6.

[0032] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The cleaning mechanism 2 includes a first shell 201 and a second shell 202, which are symmetrically connected to both sides of the third shell 4. The interior of the second shell 202 is connected to a vertical rod 209, and the outer surface of the vertical rod 209 is slidably connected to a slider 208.

[0033] In the specific setting, a motor 205 is connected to the top of the first shell 201, the output shaft of the motor 205 passes through the first shell 201 and is connected to a screw 204, and the other end of the screw 204 is rotatably connected to the inside of the first shell 201. Through the setting of the motor 205, the output shaft of the motor 205 can be manually controlled to rotate, thereby driving the screw 204 to rotate inside the first shell 201.

[0034] In the specific setting, the outer surface of the screw 204 is threadedly connected to a threaded seat 206, and the threaded seat 206 is slidingly connected to the inside of the first shell 201. The setting of the threaded seat 206 can drive the threaded seat 206 with the outer surface threaded connection to slide up and down inside the first shell 201 when the screw 204 rotates.

[0035] In the specific setting, a scraper 207 is connected to one side of the threaded seat 206, and the other end of the scraper 207 is connected to one side of the slider 208. One side of the scraper 207 is close to one side of the filter plate 7. Through the setting of the scraper 207, when the threaded seat 206 moves up and down, the scraper 207 can be driven to move, and the slider 208 can be driven to slide on the surface of the vertical rod 209. By moving the scraper 207 downward, the impurities intercepted on one side of the filter plate 7 can be cleaned.

[0036] In a specific configuration, a through hole 203 is formed through the bottom of the third shell 4 , wherein the scraped impurities can be moved to the interior of the collection box 302 through the through hole 203 .

[0037] In the specific setting, the collection mechanism 3 includes a collection box 302, which is connected to the bottom of the third shell 4. The collection box 302 is set directly below the through hole 203. Through the setting of the collection box 302, impurities can be collected inside the collection box 302, and a discharge port is provided at the bottom of the collection box 302. When a large amount of impurities are collected inside the collection box 302, the collected impurities can be discharged through the discharge port.

[0038] In the specific setting, a cavity 301 is opened inside the third shell 4, and a movable plate 304 is slidably connected inside the cavity 301. One side of the movable plate 304 is connected to multiple groups of first springs 303, and the other end of the first spring 303 is connected to the inner wall of the cavity 301. Among them, through the setting of the movable plate 304, when the movable plate 304 is forced to move toward the inside of the cavity 301, the first spring 303 is compressed, and the movable plate 304 gradually moves away from the top of the through hole 203, so that the through hole 203 can be opened. When the movable plate 304 is not subjected to force, the first spring 303 releases elastic potential energy, driving the movable plate 304 to reset and move to the top of the through hole 203, so as to block the through hole 203, and prevent the impurities collected in the collection box 302 from entering the interior of the third shell 4 again when the impurities are not cleaned.

[0039] In the specific setting, multiple groups of steel wire ropes 305 are connected to one side of the movable plate 304, and one end of the steel wire rope 305 passes through the third shell 4 multiple times and is connected to the top of the scraper 207. Among them, through the setting of the steel wire rope 305, when the scraper 207 moves downward, the steel wire rope 305 can drive the movable plate 304 to move toward the inside of the cavity 301, so that the through hole 203 is opened, so that the scraped impurities can pass through the through hole 203 and enter the inside of the collection box 302.

[0040] In the specific setting, the middle section of the wire rope 305 is provided with a breaking point 306, and both ends of the breaking point 306 are connected to mounting plates 307, and a second spring 308 is connected between the two sets of mounting plates 307. Among them, through the setting of the second spring 308, the second spring 308 can be stretched during the continuous descent of the scraper 207.

[0041] In the specific setting, the elastic potential energy of the second spring 308 is greater than the elastic potential energy of the first spring 303. Specifically, by setting the elastic potential energy of the second spring 308 to be greater than the first spring 303, after the first spring 303 is fully compressed, the movable plate 304 cannot move inside the cavity 301, and the through hole 203 is fully opened. Only then can the second spring 308 begin to stretch, so that the scraper 207 can continue to move downward, and the entire filter plate 7 can be cleaned by the scraper 207.

[0042] The working principle of the low-temperature waste heat deep recovery device in the sulfuric acid production process is as follows: when the low-temperature waste heat deep recovery device in the sulfuric acid production process is used, the flue gas containing SO3 generated in the sulfuric acid production process enters the interior of the third shell 4 through the first pipe 5, is filtered through the filter plate 7, and then enters the interior of the high-temperature absorption tower 1 through the second pipe 6. The output shaft of the control motor 205 can be rotated to drive the threaded rod to rotate inside the first shell 201, drive the threaded seat 206 to move downward inside the first shell 201, drive the scraper 207 to move downward, and use the scraper 207 to clean the impurities intercepted on one side of the filter plate 7. When the scraper 207 moves downward, the wire rope 305 is set to drive the movable plate 304 to move toward the interior of the cavity 301, compress the first spring 303, and make the movable plate 304 move away from the top of the through hole 203, thereby opening the through hole 203. The filter 7 is opened, so that the impurities scraped off by the scraper 207 can pass through the through hole 203 and enter the interior of the collection box 302, and the impurities are collected by the collection box 302. After the first spring 303 is fully compressed, the movable plate 304 cannot move inside the cavity 301, and the through hole 203 is fully opened. The second spring 308 can begin to stretch, so that the scraper 207 can continue to move downward to clean the entire filter plate 7. When the scraper 207 moves upward, the second spring 308 and the first spring 303 gradually restore their deformation, driving the movable plate 304 to reset and move to the top of the through hole 203 to block the through hole 203, thereby preventing the impurities collected in the collection box 302 from entering the interior of the third shell 4 again when the impurities are not cleaned, thereby solving the problem that most of the filter plates 7 of the existing filtering mechanism need to be disassembled before the filter plates 7 can be cleaned, and the process of disassembling the filter plates 7 is time-consuming and labor-intensive.

[0043] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A device for recovering low-temperature waste heat in a sulfuric acid production process, characterized in that: include A high-temperature absorption tower (1), wherein the input end of the high-temperature absorption tower (1) is connected to a second pipe (6), the other end of the second pipe (6) is connected to a third shell (4), the input end of the third shell (4) is connected to a first pipe (5), a filter plate (7) is connected to the interior of the third shell (4), a cleaning mechanism (2) for cleaning the filter plate (7) is provided inside the third shell (4), and a collecting mechanism (3) for collecting impurities is provided inside the third shell (4); The cleaning mechanism (2) comprises a first shell (201) and a second shell (202), wherein the first shell (201) and the second shell (202) are symmetrically connected to two sides of a third shell (4), a vertical rod (209) is connected inside the second shell (202), and a slider (208) is slidably connected to the outer surface of the vertical rod (209).

2. The low-temperature waste heat deep recovery device in the sulfuric acid production process according to claim 1, characterized in that: A motor (205) is connected to the top of the first shell (201), an output shaft of the motor (205) passes through the first shell (201) and is connected to a screw rod (204), and the other end of the screw rod (204) is rotatably connected to the inside of the first shell (201).

3. The low-temperature waste heat deep recovery device in the sulfuric acid production process according to claim 2, characterized in that: The outer surface of the screw rod (204) is threadedly connected to a threaded seat (206), and the threaded seat (206) is slidably connected to the interior of the first housing (201).

4. The device for recovering low-temperature waste heat in a sulfuric acid production process according to claim 3, characterized in that: One side of the threaded seat (206) is connected to a scraper (207), the other end of the scraper (207) is connected to one side of the slider (208), and one side of the scraper (207) is in close contact with one side of the filter plate (7).

5. The low-temperature waste heat deep recovery device in the sulfuric acid production process according to claim 4, characterized in that: A through hole (203) is provided through the bottom of the third shell (4).

6. The low-temperature waste heat deep recovery device in the sulfuric acid production process according to claim 1, characterized in that: The collecting mechanism (3) comprises a collecting box (302), the collecting box (302) is connected to the bottom of the third shell (4), and the collecting box (302) is arranged directly below the through hole (203).

7. The device for recovering low-temperature waste heat in a sulfuric acid production process according to claim 6, characterized in that: A cavity (301) is provided inside the third shell (4), a movable plate (304) is slidably connected to the inside of the cavity (301), a plurality of first springs (303) are connected to one side of the movable plate (304), and the other end of the first spring (303) is connected to the inner wall of the cavity (301).

8. The device for deep recovery of low-temperature waste heat in a sulfuric acid production process according to claim 7, characterized in that: One side of the movable plate (304) is connected to a plurality of sets of steel wire ropes (305), one end of each of the steel wire ropes (305) passes through the third housing (4) multiple times and is connected to the top of the scraper (207).

9. The device for deep recovery of low-temperature waste heat in a sulfuric acid production process according to claim 8, characterized in that: A disconnection point (306) is provided in the middle section of the steel wire rope (305), both ends of the disconnection point (306) are connected to mounting plates (307), and a second spring (308) is connected between the two groups of mounting plates (307).

10. The device for deep recovery of low-temperature waste heat in a sulfuric acid production process according to claim 9, characterized in that: The elastic potential energy of the second spring (308) is greater than the elastic potential energy of the first spring (303).

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