Blowing system for bag-type dust collector

Abstract

The utility model provides a blowing system for a bag-type dust collector, and relates to the technical field of bag-type dust collectors. The device comprises an air tap, an electromagnetic pulse valve, an air storage tank, an off-line switching structure and a controller, the air nozzle is arranged above a filter bag of the bag-type dust collector, the air injection direction faces the interior of the filter bag, one end of the electromagnetic pulse valve is connected with an air path of the air nozzle, the other end of the electromagnetic pulse valve is connected with an air path of the air storage tank, and the electromagnetic pulse valve is electrically connected with the controller; the bag-type dust remover comprises a dust removal box, the dust removal box comprises at least two groups of communicated dust gas chambers and gas purification chambers, the off-line switching structure comprises a baffle, a cylinder and a valve plate, the baffle is located at the boundary of exhaust convergence of each group of gas purification chambers, the baffle is provided with elongated slot-shaped air holes communicated with each group of gas purification chambers, the cylinder is a double-rod cylinder, and a cylinder body of the cylinder is vertically fixed on the baffle; the valve plate is fixed to the end of the air cylinder rod. The blowing system for the bag-type dust collector is high in automation degree and capable of effectively solving the problem of secondary adsorption during dust removal.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, specifically to a jet cleaning system for baghouse dust collectors. Background Technology

[0002] Baghouse dust collectors are dry gas purification devices widely used in industries such as steel, cement, power, non-ferrous metal smelting, waste incineration, and hazardous waste incineration. They possess high capture efficiency for fine particulate matter, resulting in high classification efficiency. Baghouse dust collectors are flexible in their application, suitable for both low-volume gas purification and high-volume applications (up to millions of cubic meters per hour).

[0003] The key to a baghouse dust collector lies in its cleaning process. As long as cleaning is performed correctly, the entire dust collection system can operate stably and reliably. Conversely, if dust cannot be removed, resistance will increase, and the baghouse dust collector may even stop working. Baghouse dust collectors are mainly classified according to their cleaning methods into mechanical vibration type, compartment reverse air type, nozzle reverse air type, pulse jet type, and vibration-reverse air hybrid type. Among them, the pulse jet type uses compressed air as power, utilizing a pulse jet mechanism to release pulsed compressed airflow, inducing secondary air to be injected into the filter bags, causing the filter bags to deform and shake, thus removing accumulated dust.

[0004] Existing pulse-jet cleaning systems for baghouse dust collectors suffer from secondary dust adsorption during cleaning. Utility Model Content

[0005] Therefore, this utility model proposes a jet cleaning system for bag filters to solve the problems existing in the prior art.

[0006] The technical solution of this utility model is as follows:

[0007] A pulse-jet cleaning system for a baghouse dust collector includes a nozzle, an electromagnetic pulse valve, an air tank, an offline switching structure, and a controller. The nozzle is positioned above the filter bags of the baghouse dust collector with the jet direction facing inwards. One end of the electromagnetic pulse valve is connected to the air path of the nozzle, and the other end is connected to the air path of the air tank. The electromagnetic pulse valve is electrically connected to the controller. The air tank is connected to a compressor, which supplies air to the air tank. The baghouse dust collector includes a dust collection box, which includes at least two sets of interconnected dust chambers and clean air chambers. The offline switching structure includes a baffle, a cylinder, and a valve plate. The baffle is located at the boundary where the exhaust gases from each set of clean air chambers converge. The baffle has elongated slot-shaped air holes that communicate with each set of clean air chambers. The cylinder is a double-rod cylinder, with the cylinder body vertically fixed to the baffle. The valve plate is fixed to the end of the cylinder rod.

[0008] As a preferred embodiment, the baffle has two connecting plates in the middle of its elongated slotted air hole. The cylinder body is fixed to the connecting plates, and the valve plate is elongated with a sealing ring on its surface facing the baffle. The cylinder body is directly fixed to the middle of the elongated slotted air hole, simplifying the structure and saving space. When the cylinder retracts, the valve plate presses against the baffle, closing the elongated slotted air hole.

[0009] As a preferred embodiment, the pulse-jet cleaning system for the baghouse dust collector also includes a differential pressure sensor. The two probes of the differential pressure sensor are located in the clean air chamber and the dust-laden air chamber, respectively, and the differential pressure sensor is electrically connected to the controller. The differential pressure sensor monitors the resistance of the baghouse dust collector in real time. When the resistance reaches a set threshold, it can issue an early warning signal, or the controller can control the cleaning mechanism, such as the electromagnetic pulse valve, to initiate the cleaning action.

[0010] As a preferred embodiment, the cylinder is connected to the air tank via an air circuit, and a solenoid valve is installed on the air circuit between the cylinder and the air tank. The solenoid valve is electrically connected to the controller. In this case, the opening and closing of the elongated slotted air hole can be automatically controlled by the controller. When the elongated slotted air hole is closed, the airflow in the dust chamber and clean air chamber of the air circuit containing the air hole is cut off, and the dust chamber and clean air chamber are in an offline state. In this state, the dust removal is more thorough.

[0011] As a preferred embodiment, the gas storage tank is equipped with a pressure sensor that measures the pressure of the gas inside the tank. The pressure sensor is electrically connected to the controller, and the compressor is also electrically connected to the controller. With this configuration, the gas pressure inside the storage tank can be automatically controlled by the controller and adjusted as needed.

[0012] The working principle and beneficial effects of this utility model are as follows:

[0013] The pulse-jet cleaning system for baghouse dust collectors provided by this utility model continuously monitors the pressure difference between the clean air chamber and the dust-laden air chamber using a differential pressure sensor. The greater the pressure difference, the greater the resistance to system operation. When the maximum value set in the controller is reached, the controller activates the solenoid valve connected to the cylinder. The cylinder contracts and closes the elongated slot-shaped air hole at the clean air chamber, putting the dust-laden air chamber and the clean air chamber offline. The controller then activates the corresponding solenoid pulse valve to start cleaning. At this time, compressed air is ejected from the air nozzle in the offline clean air chamber, and the filter bag below the air nozzle shakes under the airflow to remove accumulated dust. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structural position of this utility model;

[0016] Figure 2This is a partially disassembled structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the offline switching structure;

[0018] Figure 4 This is a schematic diagram of the cylinder mounting structure on the baffle.

[0019] In the diagram: 1. Gas tank; 2. Electromagnetic pulse valve; 3. Air nozzle; 4. Filter bag liner; 5. Exhaust hood; 6. Baffle; 61. Long slotted air hole; 62. Connecting plate; 7. Cylinder; 8. Valve plate; 9. Sealing ring. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0021] Please refer to Figures 1 to 4 As shown, this embodiment provides a pulse-jet cleaning system for a bag filter, which includes an air nozzle 3, an electromagnetic pulse valve 2, an air tank 1, an offline switching structure, and a controller. The air nozzle 3 is positioned above the filter bags of the bag filter, with the jet direction pointing inwards towards the filter bags. The filter bags contain a filter bag liner 4. One end of the electromagnetic pulse valve 2 is connected to the air nozzle 3 via an air path, and the other end is connected to the air tank 1 via an air path. The electromagnetic pulse valve 2 is also electrically connected to the controller. The air tank 1 is connected to a compressor via an air path, and the compressor supplies air to the air tank. The bag filter includes a dust collection box, which preferably includes at least two interconnected dust chambers and clean air chambers. In this embodiment, there are two sets of dust chambers and clean air chambers.

[0022] The offline switching structure includes a baffle 6, a cylinder 7, and a valve plate 8. The baffle 6 is located at the boundary where the exhaust gases of each group of clean air chambers converge. An exhaust hood 5 is provided at the exhaust convergence point. The baffle 6 has elongated slotted air holes 61 that communicate with each group of clean air chambers. The cylinder 7 is a double-rod cylinder, with its cylinder body vertically fixed to the baffle 6. The valve plate 8 is fixed to the end of the cylinder rod. During normal dust filtration, the cylinder 7 is in an extended state, and the elongated slotted air holes 61 are open. When dust cleaning is required, the cylinder 7 retracts, and the valve plate 8 closes the elongated slotted air holes 61. The airflow between this group of clean air chambers and the dust chamber below the clean air chamber is cut off, switching to the offline state.

[0023] The elongated slotted vent 61 of the baffle 6 has two connecting plates 62 in the middle, and the cylinder body of the cylinder 7 is fixed to the connecting plates 62 by screws. The valve plate 8 is elongated and slightly larger than the elongated slotted vent 61. A sealing ring 9 is provided on the surface of the valve plate 8 facing the baffle 6, which acts as a seal when the valve plate 8 closes the elongated slotted vent 61.

[0024] Cylinder 7 is connected to air tank 1 via an air circuit, and a solenoid valve is installed on the air circuit between cylinder 7 and air tank 1. The solenoid valve is electrically connected to the controller. The solenoid valve controls the extension and retraction of cylinder 7 to control the opening and closing of the elongated slotted air hole 61. These actions are all controlled by electrical signals sent by the controller, which can achieve automation.

[0025] The pulse-jet cleaning system for the baghouse dust collector in this embodiment also includes a differential pressure sensor and a pressure sensor. The two probes of the differential pressure sensor are located in the clean air chamber and the dust-laden air chamber, respectively, measuring the pressure difference between the two chambers. The differential pressure sensor is also electrically connected to the controller, which determines the timing of dust removal based on the magnitude of the pressure difference. The pressure sensor is installed on the air storage tank, measuring the pressure of the gas inside. The controller is electrically connected to both the pressure sensor and the compressor. If the pressure value is lower than a set threshold, the compressor is activated to replenish air to the air storage tank until the set pressure is reached.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pulse-jet cleaning system for a bag filter, characterized in that: The system includes an air nozzle, an electromagnetic pulse valve, an air tank, an offline switching structure, and a controller. The air nozzle is positioned above the filter bags of the baghouse dust collector, with the air jet direction facing inwards. One end of the electromagnetic pulse valve is connected to the air nozzle's air path, and the other end is connected to the air tank's air path. The electromagnetic pulse valve is electrically connected to the controller. The air tank is connected to a compressor, which supplies air to the air tank. The baghouse dust collector includes a dust collection box, which includes at least two interconnected dust chambers and clean air chambers. The offline switching structure includes a baffle, a cylinder, and a valve plate. The baffle is located at the boundary where the exhaust gases from each clean air chamber converge. The baffle has elongated slotted air holes that communicate with each clean air chamber. The cylinder is a double-rod cylinder, with the cylinder body vertically fixed to the baffle. The valve plate is fixed to the end of the cylinder rod.

2. The pulse-jet cleaning system for a baghouse dust collector according to claim 1, characterized in that: The baffle has two connecting plates in the middle of its long slotted air hole. The cylinder body of the cylinder is fixed on the connecting plates. The valve plate is long and narrow, and a sealing ring is provided on the surface of the valve plate facing the baffle.

3. The pulse-jet cleaning system for a bag filter according to claim 2, characterized in that: The pulse-jet cleaning system for the bag filter also includes a differential pressure sensor. The two probes of the differential pressure sensor are located in the clean air chamber and the dust chamber, respectively. The differential pressure sensor is electrically connected to the controller.

4. The pulse-jet cleaning system for a bag filter according to claim 3, characterized in that: The cylinder is connected to the air tank via an air circuit, and a solenoid valve is installed on the air circuit between the cylinder and the air tank. The solenoid valve is electrically connected to the controller.

5. The pulse-jet cleaning system for a baghouse dust collector according to claim 4, characterized in that: The gas storage tank is equipped with a pressure sensor, which measures the pressure of the gas inside the gas storage tank. The pressure sensor is electrically connected to the controller, and the compressor is electrically connected to the controller.

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