A pressure-controlled baghouse dust collector and its pressure stabilization system

Abstract

This invention relates to a pressure-controlled baghouse dust collector and its pressure stabilization system, comprising a dust collection chamber, a filter assembly, a vibration assembly, a backwashing assembly, and a pressure detection assembly. The dust collection chamber has an air inlet and an air outlet. The filter assembly is installed in the dust collection chamber, facing the air inlet and connected to the air outlet. The vibration assembly is installed in the dust collection chamber and connected to the filter assembly. The backwashing assembly is installed in the dust collection chamber and facing the filter assembly. The pressure detection assembly is installed inside the dust collection chamber. The detection assembly detects the pressure value inside the dust collection chamber. If the pressure is too high, the vibration assembly and the backwashing assembly are activated to clean the dust adhering to the filter assembly, increase the filtration efficiency, and reduce the pressure inside the dust collection chamber, thereby stabilizing the pressure inside the dust collection chamber and ensuring the safe and efficient operation of the baghouse dust collector.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, and in particular to a pressure-controlled bag filter and a pressure stabilizing system. Background Technology

[0002] A bag filter is a dry dust filtration device that uses the filtration effect of fibrous fabric to filter dust-laden gas. When the dust-laden gas enters the bag filter, the larger and heavier dust particles settle down due to gravity and fall into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is trapped, thus purifying the gas.

[0003] For dusts with special physicochemical properties and high viscosity, such as lithium iron phosphate, a certain filtration resistance needs to be maintained inside the bag filter to ensure good dust removal performance.

[0004] However, as the baghouse dust collector continues to operate, the dust accumulated on the filter bags gradually thickens, and the internal pressure of the baghouse dust collector continues to increase, posing a safety hazard. Summary of the Invention

[0005] In view of this, it is necessary to provide a pressure-controlled bag filter and a pressure stabilizing system to solve the problem that as the bag filter continues to operate, the dust accumulated on the filter bags gradually thickens, the internal pressure of the bag filter continuously increases, and there are potential safety hazards.

[0006] This invention provides a pressure-controlled baghouse dust collector, comprising a dust collection chamber, a filter assembly, a vibration assembly, a backwashing assembly, and a pressure detection assembly. The dust collection chamber has an air inlet and an air outlet. The filter assembly is installed in the dust collection chamber, facing the air inlet and connected to the air outlet. The vibration assembly is installed in the dust collection chamber and connected to the filter assembly to drive the filter assembly to vibrate. The backwashing assembly is installed in the dust collection chamber and facing the filter assembly to wash away dust adhering to the filter assembly. The pressure detection assembly is installed inside the dust collection chamber to detect the pressure inside the dust collection chamber. The vibration assembly and the backwashing assembly are controlled according to the pressure inside the dust collection chamber to ensure that the pressure inside the dust collection chamber remains constant.

[0007] Furthermore, the dust removal chamber includes a cylindrical chamber and a conical chamber. The bottom of the cylindrical chamber is connected to the conical chamber. The conical chamber is a conical structure that gradually expands in the vertical upward direction. The filter assembly, the vibration assembly, and the backwashing assembly are all installed in the cylindrical chamber.

[0008] Furthermore, it also includes an air inlet pipe, on which a first pressure sensor and a pressure regulating valve are installed, and the air inlet pipe connects the spray drying tower and the cylindrical silo;

[0009] It also includes a second pressure sensor installed on the inner wall of the conical chamber;

[0010] It also includes a horizontally arranged exhaust pipe, the bottom of which is connected to the top of the silo via multiple branch pipes;

[0011] It also includes a pressure relief valve installed on the top of the silo.

[0012] Furthermore, the filter assembly includes multiple filter bags arranged in an array in the dust collection chamber, and the top openings of the multiple filter bags are connected to the air outlet of the dust collection chamber.

[0013] Furthermore, the filter assembly also includes an electrostatic precipitator, and the electrostatic precipitator and the plurality of filter bags are arranged sequentially in a direction away from the air inlet.

[0014] Furthermore, it also includes a flow equalization grid plate installed at the air inlet and multiple guide plates disposed between the electrostatic precipitator and the filter bags, so that the airflow is evenly blown onto the electrostatic precipitator and the multiple filter bags.

[0015] Furthermore, the vibration component is a vibration motor, and a vibration frame is fixedly connected to the top of the electrostatic precipitator and the multiple filter bags. The vibration frame is movably connected to the inner wall of the dust collection chamber, and the output end of the vibration motor is connected to the vibration frame.

[0016] The backwashing assembly includes an air tank, a pulse valve, and a blowpipe connected in sequence. The bottom of the blowpipe has multiple blowholes, which are positioned directly opposite the openings of the electrostatic precipitator and the multiple filter bags.

[0017] Furthermore, it also includes a discharge assembly installed at the bottom of the dust collection chamber, which is used to control the opening and closing of the discharge port at the bottom of the dust collection chamber.

[0018] Furthermore, the unloading assembly includes a rotary valve and an air hammer. The rotary valve is installed at the outlet of the dust collection chamber, and the air hammer is installed on the side wall of the dust collection chamber.

[0019] The present invention also provides a pressure stabilizing system applied to the pressure-controlled bag filter as described above, including a controller connected to the pressure detection component to receive the pressure signal detected by the pressure detection component, the controller connected to the vibration component and the backwashing component, and the controller controlling the connection and operation of the vibration component and the backwashing component according to the pressure signal.

[0020] Compared with existing technologies, the detection component detects the pressure value inside the dust collection chamber. If the pressure is too high, the vibration component and backwashing component are activated to clean the dust adhering to the filter components, increase the filtration efficiency, and reduce the pressure inside the dust collection chamber, thereby stabilizing the pressure inside the dust collection chamber and ensuring the safe and efficient operation of the bag filter. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a pressure-controlled bag filter provided in an embodiment of the present invention. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0023] like Figure 1 As shown, the present invention provides a pressure-controlled baghouse dust collector, comprising a dust collection chamber 100, a filter assembly 200, a vibration assembly 300, a backwashing assembly 400, and a pressure detection assembly. The dust collection chamber 100 has an air inlet and an air outlet. The filter assembly 200 is installed in the dust collection chamber 100, facing the air inlet and connected to the air outlet. The vibration assembly 300 is installed in the dust collection chamber 100 and connected to the filter assembly 200 to drive the filter assembly 200 to vibrate. The backwashing assembly 400 is installed in the dust collection chamber 100 and facing the filter assembly 200 to wash away dust adhering to the filter assembly 200. The pressure detection assembly is installed inside the dust collection chamber 100 to detect the pressure inside the dust collection chamber 100. The vibration assembly 300 and the backwashing assembly 400 are controlled according to the pressure inside the dust collection chamber 100 to ensure that the pressure inside the dust collection chamber 100 is constant.

[0024] During implementation, the detection component monitors the pressure value inside the dust collection chamber 100. If the pressure is too high, the vibration component 300 and the backwash component 400 are activated to clean the dust adhering to the filter component 200, increase the filtration efficiency, and reduce the pressure inside the dust collection chamber 100, thereby stabilizing the pressure inside the dust collection chamber 100 and ensuring the safe and efficient operation of the bag filter.

[0025] The dust removal chamber 100 in this embodiment includes a cylindrical chamber and a conical chamber. The bottom of the cylindrical chamber is connected to the conical chamber. The conical chamber is a cone-shaped structure that gradually expands in the vertical upward direction. The filter assembly 200, the vibration assembly 300, and the backwashing assembly 400 are all installed in the cylindrical chamber.

[0026] The dust removal chamber 100 also includes an air inlet pipe 110, on which a first pressure sensor 111 and a pressure regulating valve 113 are installed. The air inlet pipe 110 connects the spray drying tower 114 and the cylindrical silo. The first pressure sensor 111 can detect the pressure value at the feed pipe, and the pressure in the feed pipe can be adjusted by the pressure regulating valve 113.

[0027] The dust collection chamber 100 also includes a second pressure sensor 112 installed on the inner wall of the conical chamber to detect the pressure inside the dust collection chamber 100.

[0028] The dust removal silo 100 also includes a horizontally arranged exhaust pipe 120, the bottom of which is connected to the top of the cylindrical silo via multiple branch pipes 121.

[0029] The dust collection chamber 100 also includes a pressure relief valve 122 installed on the top of the cylindrical chamber. When the pressure inside the dust collection chamber 100 is too high, and the vibration assembly 300 and backwash assembly 400 cannot adjust the pressure inside the dust collection chamber 100 in time, the pressure relief valve 122 can be used to relieve the pressure in the dust collection chamber 100.

[0030] The filter assembly 200 in this embodiment includes a plurality of filter bags 220, which are arranged in an array in the dust collection chamber 100, and the top openings of the plurality of filter bags 220 are connected to the air outlet of the dust collection chamber 100.

[0031] In one embodiment, the filter assembly 200 further includes an electrostatic precipitator 210, and the electrostatic precipitator 210 and a plurality of filter bags 220 are arranged sequentially in a direction away from the air inlet. An electrostatic field is applied before the filter bags 220 are cleaned, causing large dust particles to become charged and adsorbed onto the electrostatic collection plates of the electrostatic precipitator 210, thereby improving filtration efficiency. The electrostatic precipitator 210 mainly serves a pre-cleaning function, which can reduce the burden and risk of breakage on the filter bags 220 to a certain extent, while also enhancing pressure stability.

[0032] In one embodiment, the filter assembly 200 further includes a flow equalization grid plate 230 installed at the air inlet and a plurality of flow guide plates 240 disposed between the electrostatic precipitator 210 and the filter bags 220, so that the airflow is evenly blown onto the electrostatic precipitator 210 and the plurality of filter bags 220.

[0033] Dust particles initially filtered by the electrostatic precipitator 210 are guided by the guide plate 240 and evenly impacted on the outer walls of multiple filter bags 220. The dust is trapped on the outer surface of the filter bags 220, while the purified gas enters the exhaust pipe 120 through the filter bags 220 and is finally discharged to the steam heat exchanger for waste heat recovery. As the filtration process continues, the dust layer on the surface of the filter bags gradually thickens, and the resistance increases accordingly. At the same time, the pressure inside the dust collection chamber 100 continuously rises.

[0034] Therefore, the vibrating assembly 300 and the backwashing assembly 400 can be used to clean the filter bag 220.

[0035] In this embodiment, the vibration component 300 is a vibration motor. A vibration frame is fixedly connected to the top of the electrostatic precipitator 210 and multiple filter bags 220. The vibration frame is movably connected to the inner wall of the dust collection chamber 100. The output end of the vibration motor is connected to the vibration frame.

[0036] The backwashing assembly 400 in this embodiment includes an air tank 410, a pulse valve 420, and a blowpipe 430 connected in sequence. The bottom of the blowpipe 430 has multiple blow holes, which are positioned directly opposite the openings of the electrostatic precipitator 210 and the multiple filter bags 220.

[0037] The vibration assembly 300 and the backwash assembly 400 can form a vibration-pulse linkage cleaning method. The vibration motor drives the vibration frame to vibrate, which in turn drives the electrostatic precipitator and filter bag 220 to vibrate, performing periodic vibration cleaning. Vibration cleaning can prevent material accumulation on the electrostatic precipitator, significantly reduce the wear and tear on the filter bag 220 caused by pulse cleaning, and help stabilize the internal air pressure. When the pressure inside the dust collection chamber 100 exceeds the normal range, the backwash assembly 400 starts operating. The backwash assembly 400 mainly consists of an air tank 410, a pulse valve 420, and a blowpipe 430. It automatically adjusts the frequency and intensity of the pulse according to the degree of pressure deviation. The compressed air stored in the air tank 410 is released instantaneously, and the high-pressure gas is introduced into the filter bag 220 in the form of a high-speed jet through the small holes on the blowpipe 430. The high-speed airflow causes the filter bag 220 to expand and vibrate rapidly, thereby causing the dust layer attached to the surface of the filter bag 220 to fall off. The fallen dust falls to the bottom of the dust collection chamber 100. A strong pulse can effectively blow away the material on the filter bag 220, preventing material accumulation, reducing airflow resistance, and thus lowering the internal pressure.

[0038] To handle the dust falling into the bottom of the dust collection chamber 100, this embodiment also includes a discharge assembly 500 installed at the bottom of the dust collection chamber 100. The discharge assembly 500 is used to control the opening and closing of the discharge port at the bottom of the dust collection chamber 100.

[0039] In one embodiment, the unloading assembly 500 includes a rotary valve 510 and an air hammer 520. The rotary valve 510 is installed at the outlet of the dust collection chamber 100, and the air hammer 520 is installed on the side wall of the dust collection chamber 100. Unloading via the rotary valve 510 prevents external air from entering the dust collection chamber 100, maintaining the airtightness and negative pressure within the chamber, effectively reducing dust and material loss. Simultaneously, during unloading, the air hammer 520, located outside the dust collection chamber 100, periodically strikes the inner wall of the chamber, preventing material residue from remaining on the inner wall.

[0040] The pressure detection assembly includes a first pressure sensor 111 and a second pressure sensor 112. When the pressure approaches the set upper limit but has not yet reached a dangerous level, the pressure regulating valve 113 responds by adjusting the valve opening appropriately to fine-tune the pressure and ensure it does not exceed the upper limit. When the pressure rises sharply and exceeds the safety threshold, the pressure relief valve 122 opens rapidly. The pressure relief valve 122 quickly releases some gas to prevent excessive internal pressure in the dust collector, which could lead to equipment damage and safety hazards. Through the coordinated operation and real-time monitoring and adjustment of the pressure sensors, pressure regulating valve 113, vibration assembly 300, backwashing assembly 400, filter assembly 200, and pressure relief valve 122, the internal pressure of the bag filter can be effectively stabilized, ensuring the normal operation and high-efficiency filtration performance of the dust collector.

[0041] The present invention also provides a pressure stabilizing system applied to the pressure-controlled bag filter as described above, including a controller connected to a pressure detection component to receive a pressure signal detected by the pressure detection component, the controller being connected to a vibration component 300 and a backwash component 400, and the controller controlling the connection and operation of the vibration component 300 and the backwash component 400 according to the pressure signal.

[0042] In one embodiment, the controller is connected to the first pressure sensor 111 and the second pressure sensor 112. At the same time, based on the detected pressure value, the controller can control the operation of the pressure regulating valve 113, the vibration assembly 300, the backwash assembly 400, the filter assembly 200, and the pressure relief valve 122 to ensure the stability of the internal pressure of the bag filter.

[0043] Compared with existing technologies: The detection component detects the pressure value inside the dust collection chamber 100. If the pressure is too high, the vibration component 300 and the backwash component 400 are activated to clean the dust adhering to the filter component 200, increase the filtration efficiency, and reduce the pressure inside the dust collection chamber 100, thereby stabilizing the pressure inside the dust collection chamber 100 and ensuring the safe and efficient operation of the bag filter.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A pressure-controlled baghouse dust collector, characterized in that, include: The dust collection chamber has an air inlet and an air outlet; A filter assembly is installed in the dust collection chamber, the filter assembly is positioned facing the air inlet and connected to the air outlet; A vibration assembly, which is installed in the dust collection chamber and connected to the filter assembly, is used to drive the filter assembly to vibrate; A backwashing assembly, which is installed in the dust collection chamber and positioned directly opposite the filter assembly, is used to wash away the dust adhering to the filter assembly; A pressure detection component is installed inside the dust collection chamber to detect the pressure inside the dust collection chamber. Based on the pressure inside the dust collection chamber, the vibration component and the backwashing component are controlled to operate to ensure that the pressure inside the dust collection chamber is constant. The dust collection chamber includes a cylindrical chamber and a conical chamber, with the bottom of the cylindrical chamber connected to the bottom of the conical chamber. It also includes an air inlet pipe, on which a first pressure sensor and a pressure regulating valve are installed, and the air inlet pipe connects the spray drying tower and the cylindrical silo. It also includes a second pressure sensor installed on the inner wall of the conical chamber; It also includes a horizontally arranged exhaust pipe, the bottom of which is connected to the top of the cylindrical silo via multiple branch pipes; It also includes a pressure relief valve installed on the top of the silo; The filter assembly includes multiple filter bags arranged in an array in the dust collection chamber, and the top openings of the multiple filter bags are connected to the air outlet of the dust collection chamber. The filter assembly also includes an electrostatic precipitator, and the electrostatic precipitator and the plurality of filter bags are arranged sequentially in a direction away from the air inlet. It also includes a flow equalization grid plate installed at the air inlet and multiple guide plates disposed between the electrostatic precipitator and the filter bags, so that the airflow can be evenly blown onto the electrostatic precipitator and the multiple filter bags; The vibration component is a vibration motor. A vibration frame is fixedly connected to the top of the electrostatic precipitator and the multiple filter bags. The vibration frame is movably connected to the inner wall of the dust collection chamber. The output end of the vibration motor is connected to the vibration frame. The backwashing assembly includes an air tank, a pulse valve, and a blowpipe connected in sequence. The bottom of the blowpipe has multiple blowholes, which are positioned directly opposite the openings of the electrostatic precipitator and the multiple filter bags.

2. The pressure-controlled baghouse dust collector according to claim 1, characterized in that, The conical chamber is a cone-shaped structure that gradually expands in the vertical upward direction. The filter assembly, the vibration assembly, and the backwashing assembly are all installed in the cylindrical chamber.

3. The pressure-controlled baghouse dust collector according to claim 1, characterized in that, It also includes a discharge assembly installed at the bottom of the dust collection chamber, which is used to control the opening and closing of the discharge port at the bottom of the dust collection chamber.

4. The pressure-controlled baghouse dust collector according to claim 3, characterized in that, The unloading assembly includes a rotary valve and an air hammer. The rotary valve is installed at the outlet of the dust collection chamber, and the air hammer is installed on the side wall of the dust collection chamber.

5. A voltage stabilizing system, characterized in that, The dust collector based on pressure control as described in any one of claims 1-4 includes a controller connected to the pressure detection component to receive a pressure signal detected by the pressure detection component, the controller being connected to the vibration component and the backwashing component, and the controller controlling the connection action of the vibration component and the backwashing component according to the pressure signal.

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