Compressed air recycling device used in pneumatic conveying system

Abstract

The utility model relates to the field of pneumatic conveying systems, in particular to a compressed air recycling device used in a pneumatic conveying system, which comprises a three-way pipe, and the three-way pipe comprises an inlet pipe for original airflow to enter, a discharge pipe for coarse filtration airflow to discharge and a circulating pipe for circulating airflow to pass through. A first cloth bag purification set for primary filtering of original airflow is installed in the discharge pipe, and a double-opening-degree throttler set for controlling the airflow flux of the discharge pipe and the circulation pipe is arranged in the three-way pipe. According to the pneumatic conveying system, the energy consumption of the pneumatic conveying system is remarkably reduced, and the effect of maximum utilization of original airflow is achieved through reasonable gas circulation path design.

Description

Technical Field

[0001] The present application relates to the field of pneumatic conveying systems, and in particular to a compressed air recovery and utilization device used in pneumatic conveying systems. Background Art

[0002] Currently, pneumatic conveying is widely used in many industrial production processes as a highly efficient material transport method. This technology uses airflow generated by high-pressure fans to transport powdered and other particulate materials. However, this process often involves significant air consumption, particularly during the exhaust process after the materials have been transported to their destination. This air is exhausted without being effectively utilized, resulting in energy waste and increased operating costs. Furthermore, with growing environmental awareness and technological advancements, reducing resource waste and improving energy efficiency in industrial production have become key concerns within the industry.

[0003] Currently, there are two common methods for treating exhaust gas from pneumatic conveying systems. The first involves installing air filtration devices to purify the exhaust. This method effectively removes harmful substances from the air and protects the environment, but it also carries additional costs, such as equipment purchase and maintenance expenses, and increased energy consumption. The second method involves releasing the exhaust gas directly into the atmosphere without treatment. While this method is simple and quick, it seriously violates environmental protection requirements and can expose companies to legal risks and social responsibility crises. Neither solution effectively balances economic benefits with environmental protection.

[0004] These two traditional approaches either prioritize environmental friendliness while neglecting effective economic cost management, or prioritize reducing initial investment while sacrificing the potential for long-term sustainable development. This contradiction is particularly pronounced in energy-intensive industries. Utility Model Content

[0005] In order to significantly reduce the energy consumption of the pneumatic conveying system, the present application provides a compressed air recovery and utilization device for a pneumatic conveying system through a reasonable gas circulation path design.

[0006] The present application provides a compressed air recovery and utilization device for a pneumatic conveying system using the following technical solutions:

[0007] A compressed air recovery and utilization device for a pneumatic conveying system includes a three-way pipe, which includes an inlet pipe for the original air flow to enter, an exhaust pipe for the coarse filtered air flow to discharge, and a circulation pipe for the circulating air flow to pass through. A first bag purification group for the original air flow to undergo primary filtration is installed in the exhaust pipe, and a double-opening throttle group for controlling the air flow rate of the exhaust pipe and the circulation pipe is provided in the three-way pipe.

[0008] By adopting the above technical solution, the three-way pipe provides an overall structure for the separate flow of air. The inlet pipe is for the original air flow to enter, the exhaust pipe is for the coarse filtered air flow to be discharged, and the circulation pipe is for the circulating air flow to pass through and then return to the external pumping device, thereby providing air flow power to boost the original air flow and avoiding the use of an external pressurizing device for additional pressurization. The first bag purification group is used to perform initial filtration on the original air flow, thereby filtering out larger solid particles. The double-opening throttle group is used to control the air flow separation volume in the exhaust pipe and the circulation pipe, so that the circulating air flow in the circulation pipe can re-enter the external pumping device to provide power.

[0009] Optionally, the dual-opening throttle group includes a first opening throttle for the exhaust air flow to pass through and a second opening throttle for the circulating air flow to pass through. The first opening throttle controls the opening size of the exhaust pipe, and the second opening throttle controls the opening size of the circulating pipe.

[0010] By adopting the above technical solution, the first opening throttle controls the opening size of the exhaust air discharge pipe, thereby controlling the air flow rate of the exhaust air passing through; the second opening throttle controls the opening size of the circulating air discharge pipe, thereby controlling the air flow rate of the circulating air circulating back to the inlet pipe.

[0011] Optionally, the first opening throttle and the second opening throttle are stacked and installed and located at the intersection of the discharge pipe and the circulation pipe.

[0012] By adopting the above technical solution, the first opening throttle and the second opening throttle provided at the intersection can save installation space.

[0013] Optionally, the double-opening throttle group also includes a driving device, the first-opening throttle includes a first valve stem for externally controlling the opening, the second-opening throttle includes a second valve stem for externally controlling the opening, the first valve stem is fixed to the second valve stem, and the driving device is connected to the valve stem.

[0014] By adopting the above technical solution, the driving device is used to provide a power source for controlling the first opening throttle and the second opening throttle, and the fixed first valve stem and the second valve stem are used to simultaneously control the opening of the first opening throttle and the second opening throttle.

[0015] Optionally, the first opening throttle is installed in the discharge pipe, the second opening throttle is installed in the circulation pipe, and a crank-connecting rod mechanism is provided on the outside of the three-way pipe. One end of the crank-connecting rod mechanism is connected to the first opening throttle, and the other end of the crank-connecting rod mechanism is connected to the second opening throttle. The crank-connecting rod mechanism simultaneously controls the opening of the first opening throttle and the second opening throttle.

[0016] By adopting the above technical solution, the first opening throttle installed in the exhaust pipe is used to control the opening size of the exhaust air flow, and the second opening throttle installed in the exhaust pipe is used to control the opening size of the circulating air flow. The crank-connecting rod mechanism group provides a structure for simultaneously adjusting the opening of the first opening throttle and the second opening throttle.

[0017] Optionally, the crank-connecting rod mechanism includes a first driving connecting rod fixedly connected to the output end of the driving device, the other end of the first driving connecting rod is hinged with a first transmission rod for controlling the opening of the first opening throttle, and the other end of the first transmission rod is slidingly connected to the end of the first valve stem, thereby realizing the opening control of the first opening throttle by the driving device.

[0018] By adopting the above technical solution, after the first drive link is hinged to the first transmission rod, the first drive link converts the movement of the drive device into the swing of the hinge point between the first transmission rod and the first transmission rod, which is used to realize the opening control of the first opening throttle by the drive device.

[0019] Optionally, the crank-connecting rod mechanism includes a second driving connecting rod fixedly connected to the output end of the driving device, the other end of the second driving connecting rod is hingedly connected to a second transmission rod for controlling the opening of the second opening throttle, and the other end of the second transmission rod is slidingly connected to the end of the second valve stem, thereby realizing the opening control of the second opening throttle by the driving device.

[0020] By adopting the above technical solution, after the second drive link is hinged to the second transmission rod, the second drive link converts the movement of the drive device into the swing of the hinge point between the second transmission rod and the second transmission rod, which is used to realize the opening control of the second opening throttle by the drive device.

[0021] Optionally, the opening control positions of the first opening throttle and the second opening throttle are: the sum of the exhaust gas flow of the first opening throttle and the circulating gas flow of the second opening throttle is equal to the original gas flow.

[0022] By adopting the above technical solution, the sum of the exhaust gas flow of the first opening throttle and the circulating gas flow of the second opening throttle is equal to the original gas flow. For example, the first opening throttle is fully opened and the second opening throttle is fully closed.

[0023] Optionally, the first opening throttle and the second opening throttle are of the same model.

[0024] By adopting the above technical solution, the first opening throttle and the second opening throttle of the same model are used to realize the same size of opening control port, which makes it easier to achieve that the sum of the exhaust gas flow of the first opening throttle and the circulating gas flow of the second opening throttle is equal to the original gas flow.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The three-way pipe provides a general structure for the separate flow of air. The inlet pipe is for the original air flow to enter, the discharge pipe is for the coarse filtered air flow to discharge, and the circulation pipe is for the circulating air flow to pass through and return to the external pumping device, thereby providing air flow power to boost the original air flow and avoid the use of an external pressurizing device for additional pressurization. The first bag purification group is used to perform initial filtration on the original air flow to filter out larger solid particles. The double-opening throttle group is used to control the air flow separation and displacement in the discharge pipe and the circulation pipe, so that the circulating air flow in the circulation pipe can re-enter the external pumping device to provide power.

[0027] 2. The first opening throttle controls the opening size of the exhaust air discharge pipe, thereby controlling the air flow rate of the exhaust air passing through; the second opening throttle controls the opening size of the circulating air discharge pipe, thereby controlling the air flow rate of the circulating air circulating back to the inlet pipe.

[0028] 3. The first opening throttle and the second opening throttle provided at the intersection can save installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the first embodiment.

[0030] Figure 2 It is the front view of embodiment 2.

[0031] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0032] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle.

[0033] Explanation of the accompanying drawings: 1. Tee pipe; 11. Inlet pipe; 12. Discharge pipe; 13. Circulation pipe; 2. First bag purification group; 3. Double-opening throttle group; 31. First opening throttle; 311. First valve stem; 32. Second opening throttle; 321. Second valve stem; 33. Driving device; 34. Crank-connecting rod mechanism; 341. First driving connecting rod; 342. First transmission rod; 343. Second driving connecting rod; 344. Second transmission rod; 345. Second slide; 346. First slide. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The present application discloses a compressed air recycling device for use in a pneumatic conveying system. Figure 1 and Figure 2The compressed air recovery and utilization device for the pneumatic conveying system includes a tee pipe 1, which is in a "Y" shape. The tee pipe 1 includes an inlet pipe 11 for the original air flow to enter, and the tee pipe 1 also includes a discharge pipe 12 for the coarse filtered air flow to be discharged. The tee pipe 1 also includes a circulation pipe 13 for the circulating air flow to pass through. A first bag purification group 2 is provided in the tee pipe 1, thereby providing gas-solid separation for the original air flow. A double-opening throttle group 3 is provided in the tee pipe 1. The gas enters the double-opening throttle group 3, and after diversion, enters the discharge pipe 12 and the circulation pipe 13 respectively. The circulating air flow in the circulation pipe 13 re-enters the inlet pipe 11, thereby providing power support for the original air flow. The air flow in the discharge pipe 12 is separated by the first bag purification group 2 and discharged to the outside to the external air purification device.

[0036] Example 1

[0037] Reference Figure 1 The double-opening throttle group 3 includes a first opening throttle 31, which allows the exhaust air flow to pass through. The double-opening throttle group 3 also includes a second opening throttle 32, which allows the circulating air flow to pass through. The first opening throttle 31 controls the opening size of the exhaust pipe 12 to control the exhaust air flow rate, and the second opening throttle 32 controls the opening size of the circulation pipe 13 to control the circulating air flow rate.

[0038] Reference Figure 1 The first opening throttle 31 and the second opening throttle 32 are stacked and installed to save installation space. The stacked first opening throttle 31 and the second opening throttle 32 are located at the intersection of the exhaust pipe 12 and the circulation pipe 13, and provide original airflow for the exhaust pipe 12 and the circulation pipe 13 at the same time.

[0039] Reference Figure 1The double-opening throttle group 3 also includes a driving device 33. The first opening throttle 31 includes a first valve stem 311. The first valve stem 311 is connected to the driving device 33 for externally controlling the opening. The second opening throttle 32 includes a second valve stem 321. The first valve stem 311 and the second valve stem 321 are fixedly connected. The first valve stem 311 and the second valve stem 321 are connected to the driving device 33 after being fixed. The driving device 33 rotates to control the first valve stem 311 and the second valve stem 321 to rotate at the same angle. For example, when the driving device 33 is in the initial state, that is, 0°, the first opening throttle 31 is fully opened, the second opening throttle 32 is fully closed, and the original airflow It completely enters the exhaust pipe 12 through the first opening throttle 31, and no circulating airflow is generated; when the driving device 33 rotates 360° clockwise, the first opening throttle 31 is completely closed, and the second opening throttle 32 is completely opened, and the original airflow completely enters the circulation pipe 13, and no external discharge is generated; when the driving device 33 rotates 180° clockwise, the first opening throttle 31 is half open, and the second opening throttle 32 is half open, half of the original airflow enters the exhaust pipe 12, and the other half of the original airflow enters the circulation pipe 13, and the original airflow entering the circulation pipe 13 is completely converted into circulating airflow and re-enters the inlet pipe 11, thereby providing assistance to the original airflow.

[0040] Reference Figure 1 The first opening throttle 31 and the second opening throttle 32 are stacked and installed to form an installable whole, which is located at the intersection of the discharge pipe 12 and the circulation pipe 13, so that the discharge pipe 12 and the circulation pipe 13 can be separate spaces, thereby achieving the function of conveying airflow separately.

[0041] Reference Figure 1 The double-opening throttle group 3 also includes a driving device 33, which provides a power source. The first opening throttle 31 includes a first valve stem 311, which is used to control the opening size of the first opening throttle 31. The clockwise opening becomes larger, and the counterclockwise opening becomes smaller. The second opening throttle 32 includes a second valve stem 321, which is used to control the opening size of the second opening throttle 32. The clockwise opening becomes smaller, and the counterclockwise opening becomes larger.

[0042] The implementation principle of Example 1 is as follows: the original air flow containing solid waste enters the inlet pipe 11, and then passes through the first bag purification group 2 in the inlet pipe 11 for preliminary filtration of large particles. The original air flow enters the pre-adjusted double-opening throttle group 3, and the first valve stem 311 and the second valve stem 321 that are fixed are adjusted by the driving device 33, so that the opening sizes of the first opening throttle 31 and the second opening throttle 32 in the double-opening throttle group 3 are the same. Half of the original air flow enters the inlet pipe 11 through the circulation pipe 13, thereby providing power for the original air flow, thereby saving energy.

[0043] Example 2

[0044] Reference Figure 2 The different opening degrees of the first opening throttle 31 installed in the discharge pipe 12 and the second opening throttle 32 installed in the circulation pipe 13 can also provide different air flow rates for the discharge pipe 12 and the circulation pipe 13. A crank-connecting rod mechanism 34 is provided on the outside of the three-way pipe 1. One end of the crank-connecting rod mechanism 34 is connected to the first opening throttle 31 to realize the opening control of the first opening throttle 31, and the other end of the crank-connecting rod mechanism 34 is connected to the second opening throttle 32 to realize the opening control of the second opening throttle 32.

[0045] Reference Figure 2 and Figure 3 The crank-connecting rod mechanism 34 includes a first driving connecting rod 341, which is fixedly connected to the output end of the driving device 33. The other end of the first driving connecting rod 341 is hinged with a first transmission rod 342. The first transmission rod 342 is used to control the opening of the first opening throttle 31. A first sliding groove 346 is provided at the end of the first transmission rod 342. The end of the first valve stem 311 is located in the first sliding groove 346. The other end of the first transmission rod 342 is slidably connected to the end of the first valve stem 311. The clockwise rotation of the first transmission rod 342 drives the first valve stem 311 to rotate clockwise, and vice versa.

[0046] Reference Figure 2 and Figure 4 The crank-connecting rod mechanism 34 includes a second driving connecting rod 343, which is fixedly connected to the output end of the driving device 33. The other end of the second driving connecting rod 343 is hinged with a second transmission rod 344. The second transmission rod 344 is used to control the opening of the second opening throttle 32. A second sliding groove 345 is provided at the end of the second transmission rod 344. The end of the second valve stem 321 is located in the second sliding groove 345. The other end of the second transmission rod 344 is slidably connected to the end of the second valve stem 321. The clockwise rotation of the second transmission rod 344 drives the second valve stem 321 to rotate clockwise, and vice versa.

[0047] Reference Figure 2The opening control positions of the first opening throttle 31 and the second opening throttle 32 are the same as those in Example 1, as follows: when the driving device 33 is in the initial state, that is, 0°, the first opening throttle 31 is fully opened, the second opening throttle 32 is fully closed, and the original airflow completely passes through the first opening throttle 31 into the exhaust pipe 12, and no circulating airflow is generated; when the driving device 33 rotates 360° clockwise, the first opening throttle 31 is fully closed, the second opening throttle 32 is fully opened, and the original airflow completely enters the circulation pipe 13, and no external discharge is generated; when the driving device 33 rotates 180° clockwise, the first opening throttle 31 is half open, the second opening throttle 32 is half open, half of the original airflow enters the exhaust pipe 12, and the other half of the original airflow enters the circulation pipe 13, and the original airflow entering the circulation pipe 13 is completely converted into circulating airflow and re-enters the inlet pipe 11, thereby providing assistance to the original airflow.

[0048] Reference Figure 2 The first opening throttle 31 and the second opening throttle 32 are of the same model. It is only necessary to adjust the initial opening of the first opening throttle 31 to closed and the initial opening of the second opening throttle 32 to open, so that the air flow change of the exhaust pipe 12 is equal to the air flow change of the circulation pipe 13 when the driving device 33 rotates.

[0049] The implementation principle of Example 2 is as follows: the first opening throttle 31 installed in the discharge pipe 12 is fixedly connected to the first driving link 341 through the driving device 33, and the first transmission rod 342 is driven to control the opening of the first opening throttle 31 after rotation. Similarly, the second opening throttle 32 installed in the circulation pipe 13 is fixedly connected to the second driving link 343 through the driving device 33, and the second transmission rod 344 is driven to control the opening of the second opening throttle 32. The initial states of the first opening throttle 31 and the second opening throttle 32 are the same as those in Example 1.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A compressed air recovery and utilization device for a pneumatic conveying system, characterized in that: The invention comprises a three-way pipe (1), wherein the three-way pipe (1) comprises an inlet pipe (11) for the entry of the original airflow, an outlet pipe (12) for the discharge of the coarse filtered airflow, and a circulation pipe (13) for the passage of the circulating airflow. A first bag purification group (2) for primary filtration of the original airflow is installed in the outlet pipe (12). A double-opening throttle group (3) for controlling the airflow rate of the outlet pipe (12) and the circulation pipe (13) is provided in the three-way pipe (1).

2. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 1, characterized in that: The dual-opening throttle group (3) comprises a first opening throttle (31) for the exhaust air flow to pass through and a second opening throttle (32) for the circulating air flow to pass through, wherein the first opening throttle (31) controls the opening size of the exhaust pipe (12), and the second opening throttle (32) controls the opening size of the circulating pipe (13).

3. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 2, characterized in that: The first opening throttle (31) and the second opening throttle (32) are stacked and installed and are located at the intersection of the discharge pipe (12) and the circulation pipe (13).

4. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 3, characterized in that: The dual-opening throttle group (3) further includes a driving device (33), wherein the first opening throttle (31) includes a first valve stem (311) for externally controlling the opening, and the second opening throttle (32) includes a second valve stem (321) for externally controlling the opening, the first valve stem (311) and the second valve stem (321) are fixedly connected, and the driving device (33) is connected to the valve stems.

5. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 2, characterized in that: The first opening throttle (31) is installed in the discharge pipe (12), and the second opening throttle (32) is installed in the circulation pipe (13). A crank-connecting rod mechanism (34) is provided outside the three-way pipe (1). One end of the crank-connecting rod mechanism (34) is connected to the first opening throttle (31), and the other end of the crank-connecting rod mechanism (34) is connected to the second opening throttle (32). The crank-connecting rod mechanism (34) simultaneously controls the opening of the first opening throttle (31) and the second opening throttle (32).

6. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 5, characterized in that: The crank-connecting rod mechanism (34) comprises a first driving connecting rod (341) fixedly connected to the output end of the driving device (33); the other end of the first driving connecting rod (341) is hingedly connected to a first transmission rod (342) for controlling the opening of the first opening throttle (31); the other end of the first transmission rod (342) is slidably connected to the end of the first valve stem (311), thereby enabling the driving device (33) to control the opening of the first opening throttle (31).

7. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 6, characterized in that: The crank-connecting rod mechanism (34) includes a second driving connecting rod (343) fixedly connected to the output end of the driving device (33); the other end of the second driving connecting rod (343) is hingedly connected to a second transmission rod (344) for controlling the opening of the second opening throttle (32); the other end of the second transmission rod (344) is slidably connected to the end of the second valve stem (321), thereby realizing the opening control of the second opening throttle (32) by the driving device (33).

8. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 7, characterized in that: The opening control positions of the first opening throttle (31) and the second opening throttle (32) are such that the sum of the exhaust gas flow of the first opening throttle (31) and the circulating gas flow of the second opening throttle (32) is equal to the original gas flow.

9. The compressed air recovery and utilization device for a pneumatic conveying system according to claim 8, characterized in that: The first opening throttle (31) and the second opening throttle (32) are of the same model.

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