Dust remover with flameless and smokeless explosion venting function

Abstract

The utility model discloses a dust remover with a flameless and smokeless explosion venting function. The dust remover comprises a dust remover body and an explosion venting and suppression system, the dust remover body comprises a dust discharging device with an explosion-proof function, a dust hopper, a dust gas chamber, a filter plate, a gas purification chamber, a dust removal system, an induced draft fan and a dust remover control system, and the filter plate is arranged in the dust gas chamber and is constructed to prevent flames and smoke from entering the gas purification chamber. The explosion venting and suppression system comprises an explosion suppression valve, an explosion venting piece and an explosion monitoring device, and the explosion venting piece is arranged on the air purification chamber and is constructed to release explosion pressure through cracking when the explosion pressure reaches the opening pressure of the explosion venting piece. The filter plate can prevent flames and dust from entering the air purification chamber, and when the interior of the dust remover explodes, the explosion venting piece installed in the air purification chamber of the dust remover cracks under the impact of explosion pressure, and the pressure generated by explosion is quickly released. Therefore, the dust remover disclosed by the utility model has the characteristics of flameless and smokeless explosion venting capability and good economical efficiency.

Description

Technical Field

[0001] The utility model relates to the field of purification and dust removal, in particular to a dust collector with flameless and smokeless explosion relief functions. Background Art

[0002] Organic dust generated in the pharmaceutical, plastic and rubber processing, grain processing, coal mining and processing processes all need to be collected and purified by dust collectors. These organic dusts are usually flammable and explosive, so the accompanying dust collectors need to adopt dust explosion-proof devices. Currently, conventional dust collectors such as filter cartridges and bag dust collectors usually use the following dust explosion-proof devices for installation: (1) Installing explosion relief plates in the dust collector dust box; (2) Installing flameless explosion relief devices in the dust collector dust box; (3) Installing explosion suppression devices in the dust collector hopper; (4) Installing explosion-proof devices at the inlet and outlet of the dust collector. The dust collector body adopts an explosion-proof design and can withstand an explosion pressure of 10 Bar. Method (1) is cheap, but it is accompanied by flames and smoke when venting the explosion, and is only suitable for working conditions where the dust collector is installed outdoors; Method (2) can be used in situations where the dust collector is installed indoors, but the price is 5-10 times that of Method (1), and when an explosion occurs, although the flame generated by the combustion explosion is prevented, smoke will be discharged to the outside, and many organic dusts will produce toxic smoke when they burn and explode; Method (3) can also be used in situations where the dust collector is installed indoors, but the price is about 15 times that of Method (1); Method (4) is the safest, but the price is several 10 times that of Method (1), and even far exceeds the price of the dust collector itself. The high cost makes it difficult for ordinary users to afford it. Therefore, how to achieve a flameless and smokeless dust collector that can safely vent the explosion and is relatively low in price has become a technical problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of this utility model is to provide a dust collector with flameless and smokeless explosion relief, utilizing a uniquely designed filter plate and explosion-proof and explosion-proof device. The filter plate within the dust collector body is a pleated, microporous, rigid matrix sintered from a polymer material. The filter plate surface is coated with polytetrafluoroethylene, and the plate head is reinforced with stainless steel. The dust collector inlet is equipped with an explosion-proof valve, the bottom of the dust collector hopper is equipped with an explosion-proof dust discharge device, and the dust collector clean air box is equipped with explosion-proof discs and an explosion monitoring device.

[0004] When handling explosive dust, if an explosion occurs inside the dust collector, the explosion-proof device installed on the dust and gas inlet air duct of the dust collector will automatically close to prevent the explosion from being transmitted upstream through the air inlet duct. The explosion relief plate installed in the clean air chamber of the dust collector will crack under the impact of the explosion pressure, quickly releasing the pressure generated by the explosion. At the same time, the explosion monitoring device will send a signal to the dust collector control system, and the dust removal fan will stop running, the dust unloading device will stop running, and the dust cleaning system will stop running.

[0005] This dust collector with flameless and smokeless explosion venting utilizes a specially designed filter plate that not only acts as a flame and explosion barrier but also prevents smoke from penetrating the filter plate and entering the dust collector's clean air chamber. Therefore, the explosion vent plate can be installed on the dust collector's clean air chamber, achieving flameless and smokeless explosion venting. This provides a highly economical method for safe explosion venting without generating flames or smoke, resulting in flameless and smokeless explosion venting, safety, and economical performance.

[0006] According to a preferred embodiment, the aforementioned dust collector with flameless and smokeless explosion relief function comprises a dust collector body and an explosion relief and flameproofing system. The dust collector body includes an explosion-proof dust discharge device, an ash hopper, a dust and gas chamber, a filter plate, a clean air chamber, a dust cleaning system, a dust removal fan, and a dust collector control system. The filter plate is disposed within the dust and gas chamber and is configured to prevent flames and smoke from entering the clean air chamber. The explosion relief and flameproofing system comprises an explosion-proofing valve, an explosion relief plate, and an explosion monitoring device. The explosion relief plate is disposed on the clean air chamber and is configured to release the explosion pressure by cracking when the explosion pressure reaches its opening pressure.

[0007] According to a preferred embodiment, the filter plate is a microporous rigid matrix sintered from a polymer material and has a pleated structure; the surface of the filter plate is coated with polytetrafluoroethylene; and the head of the filter plate uses a stainless steel plate as a reinforcement structure.

[0008] According to a preferred embodiment, the explosion venting plate is installed on the dust collector clean air chamber, and the explosion monitoring device is arranged adjacent to the explosion venting plate. The explosion monitoring device is constructed to send a signal to the dust collector control system when the explosion venting plate cracks to release the pressure generated by the explosion.

[0009] According to a preferred embodiment, an explosion-proof valve is installed on the dust gas inlet pipe of the dust collector, and an ash unloading device with an explosion-proof function is installed on the ash hopper at the bottom of the dust collector. When an explosion occurs inside the dust collector, the flap-type one-way explosion-proof valve installed on the air inlet pipe of the dust gas inlet of the dust collector is in a closed state, preventing the explosion from being transmitted upstream through the air inlet pipe, and the ash unloading device with an explosion-proof function installed at the bottom of the ash hopper stops operating under the control of the dust collector control system to prevent the explosion from being transmitted downstream.

[0010] According to a preferred embodiment, the dust collector control system is arranged outside the dust collector and is constructed to control the opening and closing of the dust collector cleaning system, dust removal fan and dust unloading device. After the dust collector control system receives an explosion signal from the explosion monitoring device, it stops the operation of the dust collector cleaning system, turns off the dust removal fan and stops the operation of the dust unloading device.

[0011] It can be seen from the above technical solutions that the dust collector with a flameless and smokeless explosion relief function involved in this application has the beneficial effect that the dust collector of this application can block flames and smoke from entering the clean air chamber by means of a filter plate arranged in the dust and gas chamber. And when an explosion occurs inside the dust collector, the explosion relief plate installed in the clean air chamber of the dust collector cracks under the impact of the explosion pressure, and quickly releases the pressure generated by the explosion. Compared with the prior art that uses expensive devices or materials to achieve explosion relief, this application can achieve safe, flameless and smokeless explosion relief only by means of a filter plate arranged in the dust and gas chamber and an explosion relief plate installed on the clean air chamber. Therefore, the dust collector of this application can achieve safe explosion relief in a very economical way, and will not generate flames and smoke during the explosion relief process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0013] Figure 1 The figure is a schematic structural diagram of a dust collector with a flameless and smokeless explosion relief function according to a preferred embodiment.

[0014] Description of reference numerals:

[0015] 1. Dust unloading device; 2. Ash hopper; 3. Dust and gas chamber; 4. Explosion-proof valve; 5. Filter plate; 5a. Filter plate base; 5b. Polytetrafluoroethylene coating; 5c. Filter plate head reinforcement plate; 6. Dust removal fan; 7. Clean air chamber; 8. Explosion venting disc; 9. Explosion monitoring device; 10. Dust collector control system; 11. Dust cleaning system. DETAILED DESCRIPTION

[0016] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0017] The structure and working principle of a dust collector with flameless and smokeless explosion relief function in this application are described in detail below through specific embodiments.

[0018] Figure 1 The schematic diagram of the structure of a dust collector with flameless and smokeless explosion relief function according to a preferred embodiment is shown as follows Figure 1As shown, the above-mentioned dust collector with flameless and smokeless explosion relief function includes a dust collector body and an explosion relief and flameproofing system. The dust collector body includes an explosion-proof dust discharge device 1, an ash hopper 2, a dust and gas chamber 3, a filter plate 5, a clean air chamber 7, a dust cleaning system 11, a dust removal fan 6, and a dust collector control system 10. The explosion relief and flameproofing system includes an explosion-proof valve 4, an explosion relief plate 8, and an explosion monitoring device 9.

[0019] In this embodiment, continue to refer to Figure 1 The filter plate 5 is arranged in the dust chamber 3 and is configured to prevent flames and smoke from entering the clean air chamber 7. The explosion relief plate 8 is arranged on the clean air chamber 7 and is configured to release the explosion pressure by cracking when the explosion pressure reaches the opening pressure of the explosion relief plate 8.

[0020] Compared to the several methods of venting explosions in dust collectors mentioned in the prior art, the present application provides a filter plate 5 in the dust chamber 3 and an explosion venting plate 8 on the clean air chamber, and the filter plate 5 and the explosion venting plate 8 cooperate with each other to achieve flameless and smokeless explosion venting in a relatively economical manner. And because the filter plate 5 can prevent substances such as flames and smoke from entering the clean air chamber 7, the explosion venting plate 8 installed on the clean air chamber 7 can achieve flameless and smokeless explosion venting when venting the explosion. Furthermore, compared to the prior art that uses expensive devices or materials to achieve explosion venting, the present application can achieve safe flameless and smokeless explosion venting only by providing a filter plate 5 in the dust chamber 3 and an explosion venting plate 8 installed on the clean air chamber 7. Therefore, the dust collector of the present application has good economic efficiency and can also be installed indoors to achieve safe flameless and smokeless explosion venting.

[0021] The filter plate substrate 5a used in the dust collector body is a microporous rigid matrix sintered from a polymer material, with a pleated structure. The filter plate surface is coated with polytetrafluoroethylene 5b, and the filter plate head is reinforced with a stainless steel plate 5c. This special structural design ensures that in the event of a dust explosion, the filter plate 5 not only serves as a flame barrier and an explosion-proof barrier, but also prevents smoke and dust from penetrating the filter plate 5 and entering the dust collector's clean air chamber 7. Preferably, the polymer material of the filter plate substrate 5a is either PE (polyethylene) or PPS (polyphenylene sulfide). Those skilled in the art can select and design according to actual needs, and this application does not impose any additional restrictions.

[0022] In one embodiment of the present application, in one embodiment of the present application, reference is made to Figure 1A flower plate is provided between the dust chamber 3 and the clean air chamber 7. The flower plate is configured to receive a filter plate 5, with at least one filter plate 5 disposed within the dust chamber 3. Specifically, grooves and sealing rings adapted to the flower plate are provided on the inner wall of the dust collector. When the flower plate, sealing ring, and filter plate 5 are assembled together, they divide the interior of the dust collector into two upper and lower sections: the clean air chamber 7 and the dust chamber 3, respectively, from top to bottom. At this point, the dust-laden airflow flowing from the dust inlet into the dust chamber 3 is configured to flow into the clean air chamber 7 only after being filtered by the filter plate 5. Specifically, as the dust-laden airflow passes through the filter plate 5, the dust attached to the airflow is blocked by the micropores of the filter plate 5. As the airflow continues to flow, the dust gradually accumulates on the surface of the filter plate 5. After this filtration process, the clean airflow, free of dust, is able to flow smoothly into the clean air chamber 7, ensuring the cleanliness of the airflow within the clean air chamber 7.

[0023] In a specific embodiment of the present application, the filter plate 5 is configured to be arranged in the dust chamber 3 perpendicular to the dust inlet of the dust collector. Of course, the filter plate 5 can also be arranged in the dust chamber 3 at an angle or parallel to the dust inlet of the dust collector. Those skilled in the art can select and design according to actual needs, and this application does not impose too many restrictions here.

[0024] The explosion venting disc 8 is installed on the dust collector clean air chamber 7. When a dust explosion occurs, the pressure wave generated by the explosion is transmitted through the filter plate 5 into the dust collector clean air chamber 7. When the explosion pressure reaches the opening pressure of the explosion venting disc, the explosion venting disc 8 cracks, quickly releasing the pressure generated by the explosion. At the same time, the explosion monitoring device 9 sends a signal to the dust collector control system 10. Specifically, when the explosion monitoring device 9 detects that the explosion pressure has reached the opening pressure of the explosion venting disc, or when the explosion monitoring device 9 detects that the explosion venting disc 8 has cracked, releasing the pressure generated by the explosion, the explosion monitoring device 9 sends a signal to the dust collector control system 10. This signal can be a signal that causes the dust collector control system 10 to stop the operation of the dust collector cleaning system 11, the dust removal fan 6, and the dust unloading device 1.

[0025] An explosion-proof valve 4 is installed on the dust collector's dust inlet pipe. Preferably, the explosion-proof valve is a flap-type one-way explosion-proof valve. An explosion-proof dust discharge device 1 is installed on the dust collector's bottom hopper 2. Preferably, the dust discharge device 1 uses a rotary discharge valve with explosion-proof function. In the event of an explosion inside the dust collector, the explosion-proof valve 4 installed on the dust collector's dust inlet air inlet pipe automatically closes, preventing the explosion from propagating upstream through the air inlet pipe. The explosion-proof dust discharge device 1 installed at the bottom of the ash hopper 2 stops operating under the control of the dust collector control system 10, preventing the explosion from propagating downstream.

[0026] Since the explosion-proof valve adopts a flap-type one-way explosion-proof valve, when an explosion occurs inside the dust collector, the explosion-proof valve 4 installed on the air inlet pipe of the dust collector will be in a closed state under the action of the explosion pressure inside the dust collector.

[0027] After receiving the explosion signal from the explosion monitoring device 9 , the dust collector control system 10 quickly stops the dust collector cleaning system 11 , quickly turns off the dust removal fan 6 and stops the operation of the dust unloading device 1 .

[0028] In a specific embodiment of the present application, the dust cleaning device 11 can be equipped with reverse gas injection or compressed gas pulse injection for dust cleaning. The dust unloading device 1 can be equipped with a rotary discharge valve with explosion-proof function. The control device 10 can be equipped with a PLC (Programmable Logic Controller) or a DCS (Distributed Control System). The explosion monitoring device 9 can be equipped with a pressure sensor or a displacement sensor. Those skilled in the art can select and design according to actual needs, and this application does not impose too many restrictions on this.

[0029] The working principle of a dust collector with flameless and smokeless explosion relief function in this application is described in detail below.

[0030] Organic dust generated in processes such as pharmaceutical manufacturing, plastic and rubber processing, grain processing, and coal mining and processing all require dust collection and purification using a dust collector. During normal production processes, the generated dust enters the dust chamber 3 of the dust collector through the air inlet duct and the explosion-proof valve 4 (open during normal operation). When the dust passes through the filter plate 5, it is blocked by the polytetrafluoroethylene coating 5b on the outer surface of the filter plate 5. As the amount of dust on the polytetrafluoroethylene coating 5b on the outer surface of the filter plate 5 increases, the filter plate 5 can be back-flushed by the dust cleaning system 11 located in the clean air chamber 7 to remove the dust accumulated on the polytetrafluoroethylene coating 5b on the outer surface of the filter plate 5. The dust first falls into the ash hopper 2 under the action of airflow and gravity, and is then discharged through the dust unloading device 1. The purified airflow is discharged through the inner cavity of the filter plate 5, the clean air chamber 7, the dust removal fan 6, etc.

[0031] When an explosion occurs inside the dust collector, the explosion-proof device 4 installed on the dust collector's dust inlet air intake duct automatically closes, preventing the explosion from transmitting upstream through the air intake duct. The explosion-proof plate 8 installed in the dust collector's clean air chamber cracks under the impact of the explosion pressure, quickly releasing the pressure generated by the explosion. At the same time, the explosion monitoring device 9 sends a signal to the dust collector control system 10, stopping the dust removal fan 6, the dust discharge device 1, and the dust cleaning system 11. This dust collector with flameless and smokeless explosion-proofing function not only safely vents explosions in a very economical manner, but also does not produce flames or smoke during the explosion-proofing process. It has the characteristics of good economy, good safety, fast response, simple and convenient maintenance, and stable and reliable operation.

[0032] Those skilled in the art will readily envision other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0033] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A dust collector with flameless and smokeless explosion relief function, comprising a dust collector body and an explosion relief and flameproof system, wherein the dust collector body comprises an ash discharge device with explosion-proof function, an ash hopper, a dust and gas chamber, a filter plate, a clean air chamber, an ash cleaning system, a dust removal fan and a dust collector control system, wherein: The filter plate is arranged in the dust and gas chamber and is constructed to prevent flames and smoke from entering the clean air chamber; the explosion venting and explosion isolation system includes an explosion isolation valve, an explosion venting plate and an explosion monitoring device, wherein the explosion venting plate is arranged on the clean air chamber and is constructed to release the explosion pressure by cracking when the explosion pressure reaches the opening pressure of the explosion venting plate.

2. The dust collector with flameless and smokeless explosion relief function according to claim 1, characterized in that: The filter plate is a microporous rigid matrix sintered from a polymer material and has a pleated structure; the surface of the filter plate is coated with polytetrafluoroethylene; and the head of the filter plate uses a stainless steel plate as a reinforcement structure.

3. The dust collector with flameless and smokeless explosion relief function according to claim 1, characterized in that: The explosion venting plate is installed on the clean air chamber of the dust collector, and the explosion monitoring device is set adjacent to the explosion venting plate. The explosion monitoring device is constructed to send a signal to the dust collector control system when the explosion venting plate cracks and releases the pressure generated by the explosion.

4. The dust collector with flameless and smokeless explosion relief function according to claim 1, characterized in that: An explosion-proof valve is installed on the dust gas inlet pipe of the dust collector, and an explosion-proof ash unloading device is installed on the ash hopper at the bottom of the dust collector. When an explosion occurs inside the dust collector, the flap-type one-way explosion-proof valve installed on the air inlet pipe of the dust gas inlet of the dust collector is in a closed state, preventing the explosion from being transmitted upstream through the air inlet pipe. The explosion-proof ash unloading device installed at the bottom of the ash hopper stops operating under the control of the dust collector control system to prevent the explosion from being transmitted downstream.

5. The dust collector with flameless and smokeless explosion relief function according to claim 3, characterized in that: The dust collector control system is arranged outside the dust collector and is constructed to control the opening and closing of the dust collector cleaning system, dust removal fan and dust unloading device. After the dust collector control system receives the explosion signal from the explosion monitoring device, it stops the operation of the dust collector cleaning system, turns off the dust removal fan and stops the operation of the dust unloading device.

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