Heat energy recycling device in sulfuric acid production process
By designing a cleaning device in the heat energy recovery device during the sulfuric acid production process, the filter grid blockage caused by boiler residue accumulation is solved, and the efficiency and life of the heat energy recovery device are improved.
Patent Information
- Application Number
- CN202421643660.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In the existing heat energy recovery device during the sulfuric acid production process, the residue produced by the boiler is prone to accumulate, resulting in clogging of the filter net, affecting the heat energy recovery efficiency and device life.
A heat energy recovery device including a boiler, a connecting pipe, a filter, a heat recovery device and a cleaning device is designed. The cleaning device cleans the surface of the filter screen by combining fan blades, fixing rods, cleaning plates and bristles to avoid residue accumulation.
It effectively avoids the residue generated by the boiler blocking the filter screen, ensures that the gas can pass normally, and improves the service life and efficiency of the heat recovery device.
Smart Images
Figure CN222978662U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat energy recovery and utilization, in particular to a heat energy recovery and utilization device in a sulfuric acid production process. Background Art
[0002] In the process of sulfuric acid production, the three main processes of combustion of sulfur-containing raw materials, oxidation of sulfur dioxide and absorption of sulfur trioxide are accompanied by the release of a large amount of chemical heat energy. In order to improve the utilization rate of energy, people generally use heat recovery devices to recycle the energy in the sulfuric acid production process.
[0003] In the prior art, the gas generated in the boiler is directly introduced into the heat recovery device. At this time, some waste slag produced by the boiler combustion is easy to enter the interior of the heat recovery device together with the gas. After long-term use, these waste slags are accumulated inside the heat recovery device, affecting the service life of the heat recovery device.
[0004] In order to solve the above problem, the prior art is to directly install a filter inside the gas conveying pipeline. However, after long-term use, the filter is easily blocked by residues, and the filter cannot be used. Utility Model Content
[0005] The utility model is to solve the shortcomings in the prior art and propose a heat energy recovery and utilization device in the sulfuric acid production process.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a heat energy recovery and utilization device in a sulfuric acid production process, comprising a boiler, a connecting pipe is fixedly connected to one side of the boiler, a filter screen is fixedly connected to the inside of the connecting pipe, a heat recovery device is fixedly connected to one end of the connecting pipe, a cooling pipe is arranged inside the heat recovery device, a hot gas output pipe is fixedly connected to one side of the heat recovery device, an exhaust gas discharge pipe is fixedly connected to one side of the heat recovery device, a cleaning device is arranged inside the connecting pipe, the cleaning device comprises two connecting rods, the two connecting rods are fixedly connected to the inside of the connecting pipe, one end of the two connecting rods is fixedly connected to the same fixed pipe, a fixed rod is arranged inside the fixed pipe, one end of the fixed rod is fixedly connected to a cleaning plate, a side of the cleaning plate away from the fixed rod is fixedly connected to a plurality of bristles, and a fan blade is fixedly connected to the arc surface of the fixed rod.
[0007] The effects achieved by the above components are as follows: When sulfuric acid needs to be produced, the staff place the raw materials into the boiler, and the boiler heats the raw materials. At this time, the generated gas passes through the filter screen in the connecting pipe and then enters the heat recovery device. The cooling pipe in the heat recovery device cools the gas coming from the boiler. After cooling, the gas is discharged into the absorption tower through the waste gas discharge pipe. The heat in the cooling pipe is absorbed by the gas in the heat recovery device and discharged from the hot gas output pipe. When the gas flows in the connecting pipe, the gas drives the fan blades on the fixed rod to rotate, and the fan blades drive the fixed rod to rotate in the fixed pipe. The cleaning plate at one end of the fixed rod drives the brush bristles to rotate on the surface of the filter screen, achieving the effect of cleaning the surface of the filter screen. The brush bristles provided by the cleaning device achieve the effect of cleaning the filter screen, avoiding the situation that the filter screen in the connecting pipe is blocked by the residues generated by the boiler, resulting in the gas being unable to pass through the filter screen normally.
[0008] Preferably, an arc plate is fixedly connected to one end of the fixed rod away from the cleaning plate, and the arc surface of the arc plate faces away from the fixed rod.
[0009] The effects achieved by the above components are as follows: By setting the arc surface of the arc plate, the frictional force between the gas and the fixed rod is reduced, thereby facilitating the rotation of the fixed rod.
[0010] Preferably, several of the brush bristles are equally divided into two groups, and the cross-section of each group of brush bristles is in an inverted hook shape.
[0011] The effects achieved by the above components are as follows: By setting the inverted hook-shaped brush bristles, when the brush bristles move, the inverted hooks of the brush bristles are easily inserted into the holes of the filter screen and hook out the residues in the holes of the filter screen, improving the cleaning effect of the filter screen.
[0012] Preferably, a fixed ring is rotatably connected to one side of the fixed pipe. The fixed ring is sleeved on the arc surface of the fixed rod. One side of the fixed ring is fixedly connected to a spring, and the other end of the spring is fixedly connected to the cleaning plate.
[0013] The effects achieved by the above components are as follows: When the cleaning plate drives the brush bristles away from the filter screen, the spring is compressed. Through the reset elastic force of the spring, the cleaning plate and the brush bristles are made to closely adhere to the filter screen as much as possible, thereby improving the cleaning effect of the cleaning plate and the brush bristles.
[0014] Preferably, a collection device is provided at the bottom of the connecting pipe. The collection device includes a rectangular pipe fixedly connected to the bottom of the connecting pipe. The inside of the rectangular pipe is communicated with the inside of the connecting pipe. A collection box is provided at the bottom of the rectangular pipe. The opening size of the collection box is adapted to the size of the rectangular pipe. L-shaped plates are fixedly connected to both ends of the collection box, and fixing bolts are threadedly connected to the surfaces of the L-shaped plates.
[0015] The effects achieved by the above components are as follows: Before collecting the residues cleaned by the cleaning plate, the staff first move the collection box, align the opening of the collection box with the bottom of the rectangular pipe, and then rotate the fixing bolt on the L-shaped plate. The fixing bolt squeezes the rectangular pipe, achieving the effect of fixing the collection box. By means of the collection box provided in the collection device, the residues cleaned by the cleaning plate are collected, which facilitates the staff to uniformly process the residues and brings convenience to the staff.
[0016] Preferably, one side of the collection box is fixedly connected with a handle, and the surface of the handle is provided with anti-slip lines.
[0017] The effects achieved by the above components are as follows: By providing the handle, the effect of facilitating the staff to move the collection box is achieved, which brings convenience to the staff.
[0018] Preferably, a sealing gasket is fixedly connected to the opening of the collection box, and the sealing gasket is a rubber gasket.
[0019] The effects achieved by the above components are as follows: By providing the sealing gasket, the effect of sealing the gap between the collection box and the rectangular pipe is achieved, preventing gas from flowing out through the gap between the collection box and the rectangular pipe.
[0020] Preferably, positioning rods are fixedly connected to both sides of the rectangular pipe, positioning tubes are fixedly connected to the collection box corresponding to the positioning rods, and the inner wall dimensions of the positioning tubes are adapted to the dimensions of the positioning rods.
[0021] The effects achieved by the above components are as follows: By sleeving the positioning tube onto the positioning rod, the effect of positioning between the collection box and the rectangular pipe is achieved, preventing misalignment between the collection box and the rectangular pipe.
[0022] In summary, the beneficial effects of the present utility model are as follows:
[0023] When gas flows in the connecting pipe, the gas drives the fan blades on the fixing rod to rotate, and the fan blades drive the fixing rod to rotate in the fixing pipe. The cleaning plate at one end of the fixing rod drives the brush bristles to rotate on the surface of the filter screen, achieving the effect of cleaning the surface of the filter screen. By means of the brush bristles provided in the cleaning device, the effect of cleaning the filter screen is achieved, preventing the residues generated by the boiler from blocking the filter screen in the connecting pipe, thereby avoiding the situation where gas cannot normally pass through the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0025] Figure 2 is a cross-sectional view of the connecting pipe of the present utility model;
[0026] Figure 3 Schematic perspective view of the cleaning device of the present utility model;
[0027] Figure 4 Cross-sectional view of the cleaning plate of the present utility model;
[0028] Figure 5 Schematic perspective view of the collection device of the present utility model.
[0029] Legend: 1. Boiler; 2. Connecting pipe; 3. Heat recovery equipment; 4. Cooling pipe; 5. Hot gas output pipe; 6. Exhaust gas discharge pipe; 7. Filter screen; 8. Cleaning device; 81. Connecting rod; 82. Fixed pipe; 83. Fixed rod; 84. Fan blade; 85. Cleaning plate; 86. Brush bristles; 87. Spring; 88. Fixed ring; 89. Arc plate; 9. Collection device; 91. Rectangular pipe; 92. Collection box; 93. L-shaped plate; 94. Fixed bolt; 95. Positioning rod; 96. Positioning pipe; 97. Handle; 98. Sealing gasket. Specific implementation manner
[0030] Referring to Figures 1-5 As shown, this embodiment discloses a heat energy recovery and utilization device in the sulfuric acid production process, including a boiler 1. One side of the boiler 1 is fixedly connected with a connecting pipe 2. A filter screen 7 is fixedly connected inside the connecting pipe 2. One end of the connecting pipe 2 is fixedly connected with a heat recovery device 3. A cooling pipe 4 is arranged inside the heat recovery device 3. One side of the heat recovery device 3 is fixedly connected with a hot gas output pipe 5. One side of the heat recovery device 3 is fixedly connected with an exhaust gas discharge pipe 6. A cleaning device 8 is arranged inside the connecting pipe 2. A collection device 9 is arranged at the bottom of the connecting pipe 2.
[0031] Referring to Figures 1-5As shown, the cleaning device 8 includes two connecting rods 81. The two connecting rods 81 are fixedly connected inside the connecting pipe 2. One end of the two connecting rods 81 is fixedly connected to the same fixed pipe 82. A fixed rod 83 is arranged inside the fixed pipe 82. One end of the fixed rod 83 is fixedly connected to a cleaning plate 85. A plurality of bristles 86 are fixedly connected to the side of the cleaning plate 85 away from the fixed rod 83. A fan blade 84 is fixedly connected to the arc surface of the fixed rod 83. When sulfuric acid needs to be produced, the staff places the raw materials into the boiler 1. The boiler 1 heats the raw materials. At this time, the generated gas enters the heat recovery device 3 after being filtered by the filter screen 7 in the connecting pipe 2. The cooling pipe 4 in the heat recovery device 3 cools the gas coming from the boiler 1. After cooling, the gas is discharged to the absorption tower through the waste gas discharge pipe 6. The heat in the cooling pipe 4 is absorbed by the gas in the heat recovery device 3 and discharged from the hot gas output pipe 5. When the gas flows in the connecting pipe 2, the gas drives the fan blade 84 on the fixed rod 83 to rotate. The fan blade 84 drives the fixed rod 83 to rotate in the fixed pipe 82. The cleaning plate 85 at one end of the fixed rod 83 drives the bristles 86 to rotate on the surface of the filter screen 7, achieving the effect of cleaning the surface of the filter screen 7. Through the bristles 86 arranged on the cleaning device 8, the effect of cleaning the filter screen 7 is achieved, avoiding the situation that the residue generated by the boiler 1 blocks the filter screen 7 in the connecting pipe 2, resulting in the gas being unable to pass through the filter screen 7 normally.
[0032] Refer to Figures 1-5 As shown, an arc plate 89 is fixedly connected to the end of the fixed rod 83 away from the cleaning plate 85. The arc surface of the arc plate 89 is away from the fixed rod 83. By setting the arc surface of the arc plate 89, the friction between the gas and the fixed rod 83 is reduced, thereby facilitating the rotation of the fixed rod 83. The plurality of bristles 86 are equally divided into two groups. The cross-section of each group of bristles 86 is in an inverted hook shape. By setting the bristles 86 in an inverted hook shape, when the bristles 86 move, the barbs of the bristles 86 are easily inserted into the holes of the filter screen 7 and hook out the residue in the holes of the filter screen 7, improving the cleaning effect of the filter screen 7. A fixed ring 88 is rotatably connected to one side of the fixed pipe 82. The fixed ring 88 is sleeved on the arc surface of the fixed rod 83. One side of the fixed ring 88 is fixedly connected to a spring 87. The other end of the spring 87 is fixedly connected to the cleaning plate 85. When the cleaning plate 85 drives the bristles 86 away from the filter screen 7, the spring 87 is compressed. Through the restoring elastic force of the spring 87, the cleaning plate 85 and the bristles 86 are made to closely adhere to the filter screen 7 as much as possible, thereby improving the cleaning effect of the cleaning plate 85 and the bristles 86.
[0033] Refer to Figures 1-5As shown in the figure, the collection device 9 includes a rectangular pipe 91. The rectangular pipe 91 is fixedly connected to the bottom of the connecting pipe 2. The interior of the rectangular pipe 91 is in communication with the interior of the connecting pipe 2. A collection box 92 is provided at the bottom of the rectangular pipe 91. The opening size of the collection box 92 is adapted to the size of the rectangular pipe 91. Both ends of the collection box 92 are fixedly connected with L-shaped plates 93, and fixing bolts 94 are threadedly connected to the surfaces of the L-shaped plates 93. Before collecting the residues cleaned by the cleaning plate 85, the staff first move the collection box 92 to make the opening of the collection box 92 fit the bottom of the rectangular pipe 91. At this time, turn the fixing bolt 94 on the L-shaped plate 93, and the fixing bolt 94 presses the rectangular pipe 91, achieving the effect of fixing the collection box 92. Through the collection box 92 provided in the collection device 9, the residues cleaned by the cleaning plate 85 are collected, which is convenient for the staff to uniformly process the residues and brings convenience to the staff.
[0034] Referring to Figures 1-5 As shown in the figure, a handle 97 is fixedly connected to one side of the collection box 92, and anti-slip lines are provided on the surface of the handle 97. By providing the handle 97, the effect of facilitating the staff to move the collection box 92 is achieved, bringing convenience to the staff. A sealing gasket 98 is fixedly connected to the opening of the collection box 92, and the sealing gasket 98 is a rubber gasket. By providing the sealing gasket 98, the effect of sealing the gap between the collection box 92 and the rectangular pipe 91 is achieved, preventing gas from flowing out through the gap between the collection box 92 and the rectangular pipe 91. Positioning rods 95 are fixedly connected to both sides of the rectangular pipe 91, and positioning tubes 96 are fixedly connected to the collection box 92 corresponding to the positioning rods 95. The inner wall size of the positioning tubes 96 is adapted to the size of the positioning rods 95. By sleeving the positioning tubes 96 onto the positioning rods 95, the effect of positioning between the collection box 92 and the rectangular pipe 91 is achieved, preventing misalignment between the collection box 92 and the rectangular pipe 91.
[0035] Working principle: When sulfuric acid needs to be produced, the staff place the raw materials into boiler 1, and boiler 1 heats the raw materials. At this time, the generated gas enters the heat recovery device 3 after being filtered by the filter screen 7 in the connecting pipe 2. The cooling pipe 4 in the heat recovery device 3 cools the gas coming from boiler 1. After cooling, the gas is discharged into the absorption tower through the waste gas discharge pipe 6. The heat in the cooling pipe 4 is absorbed by the gas in the heat recovery device 3 and discharged from the hot gas output pipe 5. When the gas flows in the connecting pipe 2, the gas drives the fan blade 84 on the fixed rod 83 to rotate, and the fan blade 84 drives the fixed rod 83 to rotate in the fixed pipe 82. The cleaning plate 85 at one end of the fixed rod 83 drives the brush hair 86 to rotate on the surface of the filter screen 7, achieving the effect of cleaning the surface of the filter screen 7. When the cleaning plate 85 drives the brush hair 86 away from the filter screen 7, the spring 87 is compressed. Through the reset elastic force of the spring 87, the cleaning plate 85 and the brush hair 86 are made to closely adhere to the filter screen 7 as much as possible, thereby improving the cleaning effect of the cleaning plate 85 and the brush hair 86. Through the brush hair 86 provided by the cleaning device 8, the effect of cleaning the filter screen 7 is achieved, avoiding the situation that the filter screen 7 in the connecting pipe 2 is blocked by the residues generated by boiler 1, resulting in the gas being unable to pass through the filter screen 7 normally.
[0036] Before collecting the residues cleaned by the cleaning plate 85, the staff first move the collection frame 92 through the handle 97. The positioning pipe 96 of the collection frame 92 is inserted into the positioning rod 95 of the rectangular pipe 91. The opening of the collection frame 92 is attached to the bottom of the rectangular pipe 91 with the help of the sealing gasket 98. At this time, the fixing bolt 94 on the L-shaped plate 93 is rotated, and the fixing bolt 94 presses the rectangular pipe 91, achieving the effect of fixing the collection frame 92. Through the collection frame 92 provided by the collection device 9, the effect of collecting the residues cleaned by the cleaning plate 85 is achieved, facilitating the staff to uniformly process the residues and bringing convenience to the staff.
Claims
1. A heat recovery and utilization device in a sulfuric acid production process, comprising a boiler (1), characterized in that: A connecting pipe (2) is fixedly connected to one side of the boiler (1), a filter screen (7) is fixedly connected to the interior of the connecting pipe (2), a heat recovery device (3) is fixedly connected to one end of the connecting pipe (2), a cooling pipe (4) is provided inside the heat recovery device (3), a hot gas output pipe (5) is fixedly connected to one side of the heat recovery device (3), an exhaust gas discharge pipe (6) is fixedly connected to one side of the heat recovery device (3), a cleaning device (8) is provided inside the connecting pipe (2), and the cleaning device (8) comprises two connecting rods (81), the two connecting rods (81) are fixedly connected to the interior of the connecting pipe (2), one end of the two connecting rods (81) is fixedly connected to the same fixed pipe (82), a fixed rod (83) is provided inside the fixed pipe (82), one end of the fixed rod (83) is fixedly connected to a cleaning plate (85), a side of the cleaning plate (85) away from the fixed rod (83) is fixedly connected to a plurality of bristles (86), and a fan blade (84) is fixedly connected to the arc surface of the fixed rod (83).
2. The heat recovery and utilization device in the sulfuric acid production process according to claim 1, characterized in that: One end of the fixing rod (83) away from the cleaning plate (85) is fixedly connected to a circular arc plate (89), and the circular arc surface of the circular arc plate (89) is away from the fixing rod (83).
3. The heat recovery and utilization device in the sulfuric acid production process according to claim 1, characterized in that: The plurality of bristles (86) are equally divided into two groups, and the cross-section of the bristles (86) in each group is in the shape of a barb.
4. The heat recovery and utilization device in the sulfuric acid production process according to claim 1, characterized in that: A fixing ring (88) is rotatably connected to one side of the fixing tube (82), the fixing ring (88) being sleeved on the arc surface of the fixing rod (83), a spring (87) being fixedly connected to one side of the fixing ring (88), the other end of the spring (87) being fixedly connected to the cleaning plate (85).
5. The heat recovery and utilization device in the sulfuric acid production process according to claim 1, characterized in that: A collecting device (9) is provided at the bottom of the connecting tube (2), the collecting device (9) comprising a rectangular tube (91), the rectangular tube (91) being fixedly connected to the bottom of the connecting tube (2), the interior of the rectangular tube (91) being connected to the interior of the connecting tube (2), a collecting frame (92) being provided at the bottom of the rectangular tube (91), the opening size of the collecting frame (92) being adapted to the size of the rectangular tube (91), L-shaped plates (93) being fixedly connected at both ends of the collecting frame (92), and fixing bolts (94) being threadedly connected to the surface of the L-shaped plate (93).
6. The heat recovery and utilization device in the sulfuric acid production process according to claim 5, characterized in that: A handle (97) is fixedly connected to one side of the collection frame (92), and a surface of the handle (97) is provided with anti-slip patterns.
7. The heat recovery and utilization device in the sulfuric acid production process according to claim 5, characterized in that: A sealing pad (98) is fixedly connected to the opening of the collection frame (92), and the sealing pad (98) is a rubber pad.
8. The heat recovery and utilization device in the sulfuric acid production process according to claim 5, characterized in that: Positioning rods (95) are fixedly connected to both sides of the rectangular tube (91), and positioning tubes (96) are fixedly connected to the collection frame (92) at locations corresponding to the positioning rods (95), and the inner wall size of the positioning tube (96) is adapted to the size of the positioning rods (95).