Finished gypsum product waste heat recycling mechanism

Abstract

The utility model relates to the technical field of waste heat recovery, and particularly discloses a gypsum finished product waste heat recycling mechanism which comprises a waste heat recovery pipe, the gas inlet end of the waste heat recovery pipe is connected with a gypsum calcining furnace, the gas outlet end of the waste heat recovery pipe is connected with waste heat utilization equipment, and the waste heat recovery pipe is communicated with the gypsum calcining furnace through a return pipe. A valve is arranged on the backflow pipe, two differential pressure sensors are arranged on the inner wall of the waste heat recovery pipe in a penetrating mode, the inner wall of the waste heat recovery pipe is connected with a filter screen through a second spring, and the filter screen is connected with a movable plate through a first spring. Damage caused by impact during vibration can be effectively prevented, and the position of the movable plate is continuously moved, so that the vibration amplitude and frequency of the filter screen are continuously improved, the vibration effect is improved, and impurities blocked at the edge of a hole can be effectively cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, and specifically designs a mechanism for recycling waste heat of finished gypsum products. Background Art

[0002] The composition of desulfurized gypsum is similar to that of natural gypsum and phosphogypsum, but it is purer than natural gypsum and its impurities are easier to handle than those of phosphogypsum. It is an ideal material for making gypsum boards. As China attaches great importance to air pollution control, desulfurization facilities are becoming more and more complete, and the output of desulfurized gypsum continues to increase. During the production process, the finished gypsum products will undergo processes such as drying and calcination, which will generate a large amount of high-temperature flue gas that is not fully utilized. The waste heat recycling mechanism can effectively recover the heat energy in the high-temperature flue gas, thereby improving energy utilization efficiency.

[0003] After searching, the applicant found a Chinese utility model patent "A boiler waste heat recovery device for desulfurization and denitrification", with the authorization publication number CN216844735U. The device uses a filter to continuously vibrate up and down in a cycle to shake the impurities and dust above it upward, thereby preventing a large amount of impurities from stagnating and clogging the filter. The technical disadvantage is that after the filter vibrates upward, when the eccentric wheel rotates to separate from the ball, the elastic force of the compressed spring drives the filter downward through the circular frame, thereby achieving vibration. However, after the filter moves back, the circular frame directly hits the inner wall of the intake pipe, generating an impact force. This impact force offsets the thrust of the spring on the circular frame, causing the circular frame to immediately stop. At this time, the filter also tends to stop vibrating. At this time, impurities on the filter will still adhere to the filter due to the cessation of vibration, resulting in poor impurity cleaning effect. In addition, the impact force will damage the filter. Based on this, the inventor purposefully provides a gypsum finished product waste heat recycling mechanism that monitors the filter blockage in real time and cleans it in time through vibration. Summary of the Invention

[0004] The purpose of the utility model is to address the deficiencies of the existing technology and provide a gypsum finished product waste heat recycling mechanism that can monitor the clogging of the filter in real time and clean the filter in time, so as to solve the problem that the filter is easily damaged by vibration and the vibration effect is low, resulting in reduced cleaning effect.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A mechanism for recycling waste heat of finished gypsum products, comprising a waste heat recovery pipe, wherein the air inlet end of the waste heat recovery pipe is connected to the gypsum calcining furnace, and the air outlet end thereof is connected to waste heat utilization equipment. The waste heat recovery pipe is connected to the gypsum calcining furnace through a return pipe, and a valve is provided on the return pipe. Two pressure differential sensors are provided through the inner wall of the waste heat recovery pipe, and a filter screen and a movable plate are slidingly provided in the waste heat recovery pipe. The filter screen is connected to the inner wall of the waste heat recovery pipe through a second spring, and the filter screen is connected to the movable plate through a first spring. A transmission assembly is provided in the waste heat recovery pipe, and the valve and the two pressure differential sensors are all connected to an external control box. When the pressure difference between the two pressure differential sensors exceeds the threshold value, the valve opens, the return pipe is in a connected state, and the high-temperature airflow therein triggers the transmission assembly to drive the movable plate to move back and forth, causing the filter screen to vibrate.

[0007] As a further optimization or improvement of this solution.

[0008] The reflux pipe is provided with an acceleration part, and the diameter of the acceleration part is smaller than the diameter of the reflux pipe. The air inlet end of the reflux pipe is connected to the gypsum calcining furnace, and the air outlet end of the acceleration part is connected to the gypsum calcining furnace.

[0009] As a further optimization or improvement of this solution.

[0010] The transmission assembly includes a cam, a rotating shaft is rotatably mounted on the waste heat recovery pipe, and the cam is fixedly mounted on the rotating shaft. One end of the rotating shaft passes through the acceleration part, and the end is fixedly connected to the fan blade. When the return pipe is connected, the high-temperature airflow impacts the fan blade, causing it to rotate, thereby driving the rotating shaft and the cam to rotate, and the convex part of the cam will intermittently hit the movable plate.

[0011] As a further optimization or improvement of this solution.

[0012] The fan blade is provided with a concave surface and a convex surface, and the concave surface faces the air inlet end of the acceleration part.

[0013] As a further optimization or improvement of this solution.

[0014] The bottom plate of the air inlet end of the waste heat recovery pipe is set as an inclined surface, a discharge pipe is inserted into the inclined surface, and the height of the feed end of the discharge pipe is lower than the height of the filter screen.

[0015] As a further optimization or improvement of this solution.

[0016] A limiting plate is fixedly installed in the waste heat recovery pipe to limit the movable plate.

[0017] Beneficial effects of the utility model:

[0018] 1. In the present invention, the pressure difference on both sides of the filter is monitored in real time by two pressure difference sensors. If the pressure difference exceeds the threshold value, it indicates that the filter is clogged. The transmission assembly is used to drive the movable plate to move back and forth in time, so that the filter is constantly vibrating between the connection end with the waste heat recovery pipe and the movable plate. The impurities on the filter are also always in a vibrating state, which makes it easier to vibrate out from the pores of the filter to achieve the cleaning effect. The filter is always located between the two springs and will not directly hit the object, which can effectively prevent damage caused by impact during vibration. The position of the movable plate is constantly moving, which makes the amplitude and frequency of the filter vibration continuously increase, thereby improving the vibration effect. After the cleaning is completed, the pressure difference returns to within the threshold value, and the vibration of the filter can be stopped in time to prevent excessive vibration from damaging the filter body.

[0019] 2. The utility model provides an acceleration part so that when the high-temperature airflow flows from the return pipe into the acceleration part, the airflow velocity will increase, thereby strengthening the impact of the high-temperature airflow on the fan blades, making the fan blades rotate faster, and then making the transmission component drive the movable plate with stronger force, accelerating the reciprocating movement of the movable plate, and then making the filter vibrate faster, and the impurities blocked at the edge of the pores on the filter screen are more easily vibrated out, avoiding the situation where the pore edges are blocked due to insufficient vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 Schematic diagram of the waste heat recovery pipe structure.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the waste heat recovery pipe.

[0024] Figure 4 Schematic diagram of the vibration component structure.

[0025] Figure 5 Schematic diagram of the fan blade structure.

[0026] Indicated in the figure:

[0027] 1. Waste heat recovery pipe; 2. Acceleration unit; 3. Rotating shaft; 4. Fan blades; 5. Cam; 6. Movable plate; 7. Filter; 8. First spring; 9. Second spring; 10. Pressure difference sensor; 11. Inclined surface; 12. Discharge pipe; 13. Gypsum calcining furnace; 14. Reflux pipe; 15. Limit plate. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 5 , a gypsum finished product waste heat recycling mechanism, which includes a waste heat recovery pipe 1, the air inlet end of the waste heat recovery pipe 1 is connected to the gypsum calcining furnace 13, and the air outlet end is connected to the waste heat utilization equipment, the waste heat recovery pipe 1 is connected to the gypsum calcining furnace 13 through the return pipe 14, and a valve is provided on the return pipe 14, and two pressure differential sensors 10 are provided through the inner wall of the waste heat recovery pipe 1, and a filter screen 7 and a movable plate 6 are slidingly provided in the waste heat recovery pipe 1, and the filter screen 7 is connected to the inner wall of the waste heat recovery pipe 1 through a second spring 9, and the filter screen 7 is connected to the movable plate 6 through a first spring 8. A transmission assembly is provided in the waste heat recovery pipe 1, and the valve and two pressure differential sensors 10 are all connected to the external control box. When the pressure difference between the two pressure differential sensors 10 exceeds the threshold value, the valve is opened, and the return pipe 14 is in a connected state, and the high-temperature airflow therein triggers the transmission assembly to drive the movable plate 6 to move back and forth, causing the filter screen 7 to vibrate.

[0030] In a specific embodiment, the waste heat utilization equipment can be set as a steam generator, the steam generator is connected to the gypsum drying equipment, an air pump is provided on the return pipe 14, and the control box includes a PLC control unit, a CPU component, a communication module and a networking module, etc. The above components and valves are all existing technologies. The specific models are not disclosed in this utility model, which does not affect the integrity of this utility model.

[0031] The working principle of the present invention is as follows: the high-temperature flue gas generated in the gypsum calcining furnace 13 is pumped into the steam generator through the waste heat recovery pipe 1, and the filter 7 in the waste heat recovery pipe 1 will filter the impurities in the high-temperature flue gas. At the same time, the control box monitors the pressure difference on both sides of the filter 7 through two pressure difference sensors 10 in real time. If the pressure difference exceeds the threshold, it means that the filter 7 is blocked and the air circulation volume becomes smaller. At this time, the control box will control the valve to open, so that the return pipe 14 is switched to a connected state, and the high-temperature flue gas is pumped into the return pipe 14 through the air pump, and flows back to the gypsum calcining furnace 13. When the high-temperature airflow flows in the return pipe 14, it will trigger the transmission component to drive the movable plate 6 to move back and forth.

[0032] When the movable plate 6 moves toward the filter screen 7, under the connection action of the first spring 8, the movable plate 6 and the filter screen 7 remain relatively stationary and move toward the second spring 9, compressing the second spring 9. Under the elastic force of the second spring 9, the movable plate 6 and the filter screen 7 will be pushed in the opposite direction to move. When the movable plate 6 moves to the farthest point in the opposite direction, under the elastic force of the first spring 8, the movable plate 6 will be pulled close to the filter screen 7. Under the joint action of the first spring 8 and the second spring 9, the filter screen 7 will continue to vibrate between the connection end with the waste heat recovery pipe 1 and the movable plate 6, and the filter screen 7 is always located between the two springs and will not directly hit the object, which can effectively prevent damage caused by impact during vibration. The position of the movable plate 6 is constantly moving, which makes the amplitude and frequency of the vibration of the filter screen 7 continue to increase, maximizes the elastic force of the spring, improves the vibration effect, and can effectively clean up impurities blocked at the edge of the pore.

[0033] When the filter 7 is automatically cleaned, the air circulation will be restored. At this time, the pressure difference sensors 10 on both sides detect that the pressure difference has returned to the threshold value. The control box will control the valve to close, cutting off the airflow source of the return pipe 14, thereby cutting off the power source of the transmission component, causing the movable plate 6 to stop moving, so that the high-temperature airflow can flow normally through the waste heat recovery pipe 1, ensuring the efficiency of waste heat recovery in the high-temperature gas.

[0034] Specifically, the reflux pipe 14 is provided with an acceleration part 2 , and the diameter of the acceleration part 2 is smaller than that of the reflux pipe 14 . The air inlet end of the reflux pipe 14 is connected to the gypsum calcining furnace 13 , and the air outlet end of the acceleration part 2 is connected to the gypsum calcining furnace 13 .

[0035] In a specific embodiment, since the diameter of the acceleration part 2 is smaller than the diameter of the return pipe 14 , when the high-temperature airflow flows from the return pipe 14 into the acceleration part 2 , the airflow velocity will increase, thereby enhancing the drive of the transmission component.

[0036] More specifically, the transmission assembly includes a cam 5, a rotating shaft 3 is rotatably mounted on the waste heat recovery pipe 1, and the cam 5 is fixedly mounted on the rotating shaft 3. One end of the rotating shaft 3 passes through the acceleration part 2, and the end is fixedly connected to the fan blade 4. When the return pipe 14 is connected, the high-temperature airflow impacts the fan blade 4, causing it to rotate, thereby driving the rotating shaft 3 and the cam 5 to rotate, and the convex part of the cam 5 will intermittently hit the movable plate 6.

[0037] In a specific embodiment, the number of fan blades 4 can be set to multiple, and the multiple fan blades 4 are arranged in a circle, and the cams 5 can be set to two, and are respectively arranged at the upper and lower ends of the movable plate 6; when the high-temperature airflow flows into the return pipe 14, the fan blades 4 will rotate under the impact of the high-temperature airflow, and the fan blades 4 are located in the acceleration part 2, and the airflow velocity in the acceleration part 2 is faster, and the fan blades 4 rotate faster, so as to drive the rotation of the rotating shaft 3 and the cam 5, and when the cam 5 rotates toward the movable plate 6, its convex part will collide and squeeze onto the movable plate 6, causing the movable plate 6 to move toward the filter 7, and the filter 7 will also move synchronously, and when the cam 5 rotates away from the movable plate 6, the squeezing force on the movable plate 6 will be suddenly released, and under the elastic force of the second spring 9, the filter 7 and the movable plate 6 will be reset, and the continuous rotation of the cam 5 will cause the movable plate 6 to move back and forth, converting the airflow power of the high-temperature gas into mechanical energy, further improving the energy utilization efficiency.

[0038] Meanwhile, it should be noted that the fan blade 4 is provided with a concave surface and a convex surface, and the concave surface faces the air inlet end of the acceleration part 2 .

[0039] In a specific embodiment, the high-temperature airflow will hit the concave surface on the fan blade 4, which can receive more airflow through the concave surface, thereby providing stronger power for the rotation of the fan blade 4, while the convex surface can reduce the resistance, so that the fan blade 4 can maintain clockwise rotation when driven by the high-temperature airflow, thereby ensuring the vibration frequency of the filter 7.

[0040] More specifically, the bottom plate of the air inlet end of the waste heat recovery pipe 1 is set as an inclined surface 11, and a discharge pipe 12 is inserted into the inclined surface 11, and the height of the feed end of the discharge pipe 12 is lower than the height of the filter screen 7.

[0041] In a specific embodiment, a valve is provided on the discharge pipe 12. The valve is a prior art and is not disclosed in detail here, so as not to affect the integrity of the solution. The impurities separated by the vibration of the filter screen 7 will fall onto the inclined surface 11 and slide along the inclined surface 11 into the discharge pipe 12. Then, the valve is opened to discharge the impurities from the inside of the waste heat recovery pipe 1.

[0042] Meanwhile, it should be noted that a limiting plate 15 is fixedly installed in the waste heat recovery pipe 1 to limit the movable plate 6 .

[0043] In a specific embodiment, the position of the farthest point of the movable plate 6 when it moves in the reverse direction is limited by the limit plate 15. When the movable plate 6 moves in the reverse direction, it will collide with the limit plate 15. At this time, the movable plate 6 will be unable to move, and its kinetic energy will react to the first spring 8, thereby strengthening the pulling force of the first spring 8 on the movable plate 6, so that the movable plate 6 has more power when moving toward the filter screen 7, and can also transmit power to the filter screen 7 faster, thereby increasing the frequency of its vibration.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A mechanism for recycling waste heat from finished gypsum products, characterized by: The waste heat recovery pipe (1) includes a waste heat recovery pipe (1), wherein the air inlet end of the waste heat recovery pipe (1) is connected to the gypsum calcining furnace (13), and the air outlet end thereof is connected to the waste heat utilization equipment. The waste heat recovery pipe (1) is connected to the gypsum calcining furnace (13) through a return pipe (14), and a valve is provided on the return pipe (14). Two pressure difference sensors (10) are provided through the inner wall of the waste heat recovery pipe (1), and a filter screen (7) and a movable plate (6) are provided in a sliding manner in the waste heat recovery pipe (1). The filter screen (7) is supported by a second spring. (9) is connected to the inner wall of the waste heat recovery pipe (1), and the filter screen (7) is connected to the movable plate (6) through the first spring (8). A transmission component is provided in the waste heat recovery pipe (1), and the valve and two pressure difference sensors (10) are connected to the external control box. When the pressure difference of the two pressure difference sensors (10) exceeds the threshold value, the valve opens, the return pipe (14) is in a connected state, and the high-temperature airflow therein triggers the transmission component to drive the movable plate (6) to move back and forth, causing the filter screen (7) to vibrate.

2. A gypsum finished product waste heat recycling mechanism according to claim 1, characterized in that: The reflux pipe (14) is provided with an acceleration portion (2), and the diameter of the acceleration portion (2) is smaller than the diameter of the reflux pipe (14). The air inlet end of the reflux pipe (14) is connected to the gypsum calcining furnace (13), and the air outlet end of the acceleration portion (2) is connected to the gypsum calcining furnace (13).

3. A gypsum finished product waste heat recycling mechanism according to claim 2, characterized in that: The transmission assembly includes a cam (5), a rotating shaft (3) is rotatably mounted on the waste heat recovery pipe (1), and the cam (5) is fixedly mounted on the rotating shaft (3). One end of the rotating shaft (3) passes through the acceleration part (2), and the end is fixedly connected to the fan blade (4). When the return pipe (14) is connected, the high-temperature airflow impacts the fan blade (4), causing it to rotate, thereby driving the rotating shaft (3) and the cam (5) to rotate, and the convex portion of the cam (5) will intermittently hit the movable plate (6).

4. A gypsum finished product waste heat recycling mechanism according to claim 3, characterized in that: The fan blade (4) is provided with a concave surface and a convex surface, and the concave surface faces the air inlet end of the acceleration part (2).

5. The mechanism for recycling waste heat of finished gypsum products according to claim 1, characterized in that: The bottom plate of the air inlet end of the waste heat recovery pipe (1) is configured as a slope (11), a discharge pipe (12) is plugged into the slope (11), and the height of the discharge pipe (12) inlet end is lower than the height of the filter screen (7).

6. The mechanism for recycling waste heat of finished gypsum products according to claim 1, characterized in that: A limiting plate (15) is fixedly installed in the waste heat recovery pipe (1) and is used to limit the movable plate (6).

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