Pipeline fire extinguishing device of bag type dust removal system

Abstract

The invention discloses a bag type dust removal system pipeline fire extinguishing device, and belongs to the technical field of dust removal equipment, each monitoring port is provided with a plurality of monitoring assemblies used for monitoring the fire behavior state of mixed smoke in a dust removal pipeline in real time, and each mounting port is provided with a pipeline fire extinguishing assembly used for instantaneously extinguishing fire in the dust removal pipeline. The monitoring assembly is electrically connected with the pipeline fire extinguishing assembly through a connecting line. According to the invention, the thermal insulation aluminum foil film in the front chamber of the cartridge is exploded, dry powder is sprayed into the dust removal pipeline along the fire extinguishing cartridge and the front chamber of the cartridge in sequence to form high-density dry powder aerosol dense fog, and after two groups of adjacent 3-5m electric initiation dry powder balls explode, a 8-10m closed area is generated in the dust removal pipeline; explosion fire heads and sparks escaping from an inlet of the dust removal pipeline can be effectively extinguished and isolated, secondary fires near an outlet are avoided, and a fire source can be timely isolated and extinguished after the sparks are monitored in the bag type dust removal system pipeline under the high-temperature and high-flow-speed working condition.

Description

Technical Field

[0001] The invention belongs to the technical field of dust removal equipment, and in particular relates to a pipeline fire extinguishing device for a bag-type dust removal system. Background Art

[0002] When the bag dust removal system in the metallurgical, chemical, thermal power, manufacturing and other industries with high pollution flue gas emission is working, combustible gases such as carbon monoxide and combustible metal particles are often present in the dust removal pipeline. Taking the bag dust removal system of the aluminum 35T smelting furnace as an example, the temperature in the pipeline can be as high as about 300°C, and the high-temperature smoke flow rate is about 20 to 23 meters per second. The gas-solid mixture in the pipeline is very likely to explode, igniting the combustible dust particles accumulated on the surface of the filter bag of the downstream dust collector in the pipeline, thus causing a secondary fire.

[0003] Due to the high flow rate and high temperature of the combustible smoke and dust mixture in the pipeline, the time from discovery to fire extinguishing after the explosion is extremely short. The current mainstream firefighting method is to detect the sparks in the pipeline through the upstream spark detector, and then activate the solenoid valve of the downstream sprinkler system of the pipeline to spray water into the dust removal pipeline. Since the detector sends a signal to the host when the fire in the pipe is detected, and then the host activates the solenoid valve, this process requires an electrical → magnetic → mechanical linkage process, which seriously delays the reaction speed of handling the fire.

[0004] The linkage reaction time of the current fire extinguishing device is more than 960 milliseconds. For the high-speed smoke and dust flow condition in the dust removal pipeline, the shortest movement distance of the fire source in the dust removal pipeline from the discovery of the fire source to the start of the mechanism spraying is more than 20 meters. For a shorter pipeline, the fire source has already entered the filter bag of the tail end dust collector, which is very likely to cause a secondary fire. In addition, the water mist sprayed by the linkage mechanism will also gather in the pipe wall and the filter bag, causing smoke mud to block the filter bag, and in serious cases, it will cause the collapse of the entire dust removal system. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a bag-type dust removal system pipeline fire extinguishing device which can timely isolate and extinguish the fire source.

[0006] The technical solution adopted to solve the above technical problems is: a plurality of monitoring ports are processed on the outer side of the pipe wall near the inlet end of the dust removal pipe, each monitoring port is respectively provided with a plurality of monitoring components for real-time monitoring of the fire status of the mixed smoke and dust in the dust removal pipe, each monitoring component is respectively located on the outer side wall of the dust removal pipe, a plurality of mounting ports are processed on the pipe wall near the outlet end of the dust removal pipe, each mounting port is respectively provided with a pipe fire extinguishing component for instantaneous fire extinguishing inside the dust removal pipe, each pipe fire extinguishing component is respectively located on the outer side wall of the dust removal pipe, and the monitoring component is electrically connected to the pipe fire extinguishing component through a connecting line; the pipe fire extinguishing component includes a magazine front chamber, a fire extinguishing magazine and a rear cover plate, and the mounting port of the dust removal pipe A magazine front chamber connected to the inside of the dust removal duct is provided on the top, a magazine front chamber flange is provided on one end face of the magazine front chamber, a fire extinguishing magazine is provided on one side of the magazine front chamber, a magazine front flange is provided at one end of the fire extinguishing magazine, a magazine rear flange is provided at the other end of the fire extinguishing magazine, a rear cover is provided near the other end of the fire extinguishing magazine, the magazine front chamber flange is hinged to the magazine front flange of the fire extinguishing magazine through a second hinge, an insulating aluminum foil film is provided between the magazine front chamber flange and the magazine front flange, the magazine rear flange is hinged to the rear cover through a first hinge, a limited steel wire mesh is provided inside the fire extinguishing magazine, an electrically triggered dry powder ball is provided inside the fire extinguishing magazine close to the rear cover, and the electrically triggered dry powder ball is located between the rear cover and the limited steel wire mesh.

[0007] Furthermore, the monitoring component includes a flame detector, an infrared detector, an MCU control module, a power module, and a communication module.

[0008] Furthermore, multiple groups of pipeline fire extinguishing components are arranged on the outer wall of the dust removal pipeline, the distance between each two adjacent groups of pipeline fire extinguishing components is 3 to 5 meters, and each group of pipeline fire extinguishing components is welded to the outer wall of the dust removal pipeline at equal intervals along the circumferential direction of the pipe wall.

[0009] Furthermore, the cross-sections of the magazine front chamber, the fire extinguishing magazine and the rear cover are polygonal or circular respectively.

[0010] Furthermore, the distance between every two adjacent monitoring components is equal.

[0011] Furthermore, the welding surface at the other end of the magazine front chamber is welded to the outer side surface of the installation opening of the dust removal duct.

[0012] Furthermore, a second sealing rubber ring is provided between the heat-insulating aluminum foil film and a magazine front flange at one end of the fire-extinguishing magazine.

[0013] Furthermore, a first sealing rubber ring is provided between the rear cover plate and the magazine rear flange at the other end of the fire extinguishing magazine.

[0014] Furthermore, the trigger wire of the electrically triggered dry powder ball is led out of the fire extinguishing magazine through the wire outlet hole on the rear cover plate, and the trigger wire is electrically connected to the connecting wire.

[0015] The beneficial effects of the present invention are as follows: When the monitoring component detects deflagration or sparks, the present invention immediately sends a start signal to the pipeline fire extinguishing component at the end of the pipe through the connecting line. The two groups of pipeline fire extinguishing components at the end of the pipe simultaneously trigger the electrically triggered dry powder balls inside the fire extinguishing magazine. The electrically triggered dry powder balls instantly generate an explosion pressure of 1.5 to 2 MPa, which ruptures the thermal insulation aluminum foil film in the magazine front chamber. The dry powder is sequentially sprayed along the fire extinguishing magazine and the magazine front chamber into the dust removal pipe to form a high-density dry powder aerosol fog. After the explosion of two groups of adjacent 3 to 5 m electrically triggered dry powder balls, an enclosed area of ​​8 to 10 meters will be generated in the dust removal pipe, which can effectively extinguish and isolate the burning and explosion fire and sparks escaping from the entrance of the dust removal pipe, avoid secondary fires near the exit, and can timely isolate and extinguish the fire source after detecting sparks in the bag dust removal system pipe under high temperature and high flow rate conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a pipe fire extinguishing device of a bag dust removal system of the present invention.

[0017] Figure 2 It is a structural diagram of the pipeline fire extinguishing assembly.

[0018] Figure 3 yes Figure 2 The schematic diagram of the structure removes the magazine front chamber, thermal insulation aluminum foil film, and magazine front chamber flange.

[0019] Figure 4 It is a structural schematic diagram of a fire extinguishing magazine, a magazine front flange and a magazine rear flange.

[0020] Figure 5 It is a schematic diagram of the structure of the magazine front chamber and the magazine front chamber flange.

[0021] Figure 6 yes Figure 2 Schematic diagram of the structure from another angle.

[0022] Figure 7 It is a structural schematic diagram of a fire extinguishing magazine, a magazine rear flange and a first sealing rubber ring.

[0023] Figure 8 It is a schematic diagram of the internal structure of the fire extinguishing magazine.

[0024] Figure numerals: 1. Pipe fire extinguishing assembly; 101. First hinge; 102. Second hinge; 103. Magazine front chamber; 104. Heat-insulating aluminum foil film; 105. Magazine front chamber flange; 106. Magazine front flange; 107. Fire extinguishing magazine; 108. Magazine rear flange; 109. First sealing rubber ring; 110. Rear cover; 111. Second sealing rubber ring; 112. Trigger wire; 113. Limiting steel wire mesh; 114. Electrically triggered dry powder ball; 2. Connecting wire; 3. Dust removal duct; 4. Monitoring assembly. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figure 1 As shown, the bag dust removal system pipeline fire extinguishing device of this embodiment is composed of a pipeline fire extinguishing component 1, a connecting line 2, a dust removal pipeline 3, and a monitoring component 4.

[0027] A plurality of monitoring ports are processed on the outer side of the pipe wall near the inlet end of the dust removal pipe 3, and each monitoring port is respectively provided with a plurality of monitoring components 4 for real-time monitoring of the fire status of the mixed smoke and dust in the dust removal pipe 3, and the distance between each two adjacent monitoring components 4 is equal. The monitoring component 4 includes a flame detector, an infrared detector, an MCU control module, a power module, and a communication module. The model of the MCU control module is STM32F103RCT6. Each monitoring component 4 is respectively located on the outer side wall of the dust removal pipe 3, and a plurality of installation ports are processed on the pipe wall near the outlet end of the dust removal pipe 3. Each installation port is respectively provided with a pipe fire extinguishing component 1 for instantaneous fire extinguishing inside the dust removal pipe 3, and each pipe fire extinguishing component 1 is respectively located on the outer side wall of the dust removal pipe 3. Multiple groups of pipe fire extinguishing components 1 are arranged on the outer side wall of the dust removal pipe 3, and the distance between each two adjacent groups of pipe fire extinguishing components 1 is 3 to 5 m. Each group of pipe fire extinguishing components 1 is welded to the outer side wall of the dust removal pipe 3 at equal intervals along the pipe wall in the circumferential direction. The monitoring component 4 is electrically connected to the pipe fire extinguishing component 1 through the connecting line 2.

[0028] like Figures 2 to 8 As shown, the pipeline fire extinguishing assembly 1 is composed of a first hinge 101, a second hinge 102, a magazine front chamber 103, an insulating aluminum foil film 104, a magazine front chamber flange 105, a magazine front flange 106, a fire extinguishing magazine 107, a magazine rear flange 108, a first sealing rubber ring 109, a rear cover plate 110, a second sealing rubber ring 111, a trigger wire 112, a limiting steel wire mesh 113, and an electrically triggered dry powder ball 114.

[0029] The pipeline fire extinguishing assembly 1 includes a magazine front chamber 103, a fire extinguishing magazine 107 and a rear cover plate 110. The cross sections of the magazine front chamber 103, the fire extinguishing magazine 107 and the rear cover plate 110 are respectively polygonal or circular. The installation opening of the dust removal pipeline 3 is provided with a magazine front chamber 103 which is interconnected with the inside of the dust removal pipeline 3. The magazine front chamber 103 is provided with a magazine front chamber flange 105 at one end surface, and the welding surface of the other end of the magazine front chamber 103 is welded to the outer side surface of the installation opening of the dust removal pipeline 3. A fire extinguishing magazine 107 is arranged on one side of the magazine front chamber 103, a magazine front flange 106 is arranged at one end of the fire extinguishing magazine 107, a magazine rear flange 108 is arranged at the other end of the fire extinguishing magazine 107, a rear cover plate 110 is arranged near the other end of the fire extinguishing magazine 107, the magazine front chamber flange 105 is hinged to the magazine front flange 106 of the fire extinguishing magazine 107 through a second hinge 102, an insulating aluminum foil film 104 is arranged between the magazine front chamber flange 105 and the magazine front flange 106, and a second sealing rubber ring 111 is arranged between the insulating aluminum foil film 104 and the magazine front flange 106 at one end of the fire extinguishing magazine 107.

[0030] The magazine rear flange 108 is hinged to the rear cover plate 110 through the first hinge 101, and a first sealing rubber ring 109 is provided between the rear cover plate 110 and the magazine rear flange 108 at the other end of the fire extinguishing magazine 107. A limited position steel wire mesh 113 is provided inside the fire extinguishing magazine 107, and an electric trigger dry powder ball 114 is provided inside the fire extinguishing magazine 107 near the rear cover plate 110, and the electric trigger dry powder ball 114 is located between the rear cover plate 110 and the electric trigger dry powder ball 114. The trigger wire 112 of the electric trigger dry powder ball 114 is led out of the fire extinguishing magazine 107 through the outlet hole on the rear cover plate 110. The trigger wire 112 is electrically connected to the connecting wire 2.

[0031] The working principle of this embodiment is as follows: the temperature of the flue gas mixture leaving the furnace is very high, and as the mixture flows along the dust removal pipe 3 and exchanges heat with the pipe wall, its temperature will also decrease. Therefore, the explosion in the dust removal pipe 3 of the dust removal system generally occurs at the inlet end of the dust removal pipe of the smelting furnace and the holding furnace. In this embodiment, a monitoring component 4 is arranged at the inlet end of the dust removal pipeline 3. When the monitoring component 4 detects deflagration or sparks, a start signal is immediately sent to the pipeline fire extinguishing component 1 at the end of the pipeline through the connecting line 2. The two groups of pipeline fire extinguishing components 1 at the end of the pipeline simultaneously trigger the electrically triggered dry powder balls 114 inside the fire extinguishing magazine 107. The electrically triggered dry powder balls 114 instantly generate an explosion pressure of 1.5 to 2 MPa when they explode, which ruptures the heat-insulating aluminum foil film 104 in the magazine front chamber 103. The dry powder is sequentially sprayed along the fire extinguishing magazine 107 and the magazine front chamber 103 into the dust removal pipeline 3 to form a high-density dry powder aerosol fog. After the explosion of two groups of electrically triggered dry powder balls 114 adjacent to each other for 3 to 5 m, a closed area of ​​8 to 10 meters will be generated in the dust removal pipeline 3, which can effectively extinguish and isolate the burning and sparks escaping from the entrance of the dust removal pipeline 3, and avoid secondary fires near the exit.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A bag dust removal system pipeline fire extinguishing device, characterized in that: A plurality of monitoring ports are machined on the outer side of the pipe wall near the inlet end of the dust removal pipe (3), each monitoring port is provided with a plurality of monitoring components (4) for real-time monitoring of the fire status of the mixed smoke in the dust removal pipe (3), each monitoring component (4) is located on the outer side wall of the dust removal pipe (3), a plurality of installation ports are machined on the pipe wall near the outlet end of the dust removal pipe (3), each installation port is provided with a pipe fire extinguishing component (1) for instantaneously extinguishing the fire inside the dust removal pipe (3), each pipe fire extinguishing component (1) is located on the outer side wall of the dust removal pipe (3), and the monitoring component (4) is electrically connected to the pipe fire extinguishing component (1) via a connecting line (2); The pipeline fire extinguishing assembly (1) comprises a magazine front chamber (103), a fire extinguishing magazine (107) and a rear cover plate (110); a magazine front chamber (103) which is in communication with the inside of the dust removal pipeline (3) is arranged on the installation opening of the dust removal pipeline (3); a magazine front chamber flange (105) is arranged on one end surface of the magazine front chamber (103); a fire extinguishing magazine (107) is arranged on one side of the magazine front chamber (103); a magazine front flange (106) is arranged at one end of the fire extinguishing magazine (107); a magazine rear flange (108) is arranged at the other end of the fire extinguishing magazine (107); and a rear cover plate (110) is arranged near the other end of the fire extinguishing magazine (107). The magazine front chamber flange (105) is hinged to the magazine front flange (106) of the fire extinguishing magazine (107) through a second hinge (102); a heat insulating aluminum foil film (104) is arranged between the magazine front chamber flange (105) and the magazine front flange (106); the magazine rear flange (108) is hinged to the rear cover plate (110) through a first hinge (101); a limited steel wire mesh (113) is arranged inside the fire extinguishing magazine (107); an electrically triggered dry powder ball (114) close to the rear cover plate (110) is arranged inside the fire extinguishing magazine (107); and the electrically triggered dry powder ball (114) is located between the rear cover plate (110) and the limited steel wire mesh (113).

2. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: The monitoring component (4) comprises a flame detector, an infrared detector, an MCU control module, a power module, and a communication module.

3. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: A plurality of groups of pipeline fire extinguishing components (1) are arranged on the outer wall of the dust removal pipeline (3), the distance between each two adjacent groups of pipeline fire extinguishing components (1) is 3 to 5 m, and each group of pipeline fire extinguishing components (1) is welded to the outer wall of the dust removal pipeline (3) at equal intervals along the circumferential direction of the pipeline wall.

4. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: The cross sections of the magazine front chamber (103), the fire extinguishing magazine (107) and the rear cover plate (110) are respectively polygonal or circular.

5. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: The distance between every two adjacent monitoring components (4) is equal.

6. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: The welding surface at the other end of the magazine front chamber (103) is welded to the outer side surface of the installation opening of the dust removal pipe (3).

7. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized by: A second sealing rubber ring (111) is provided between the heat-insulating aluminum foil film (104) and the magazine front flange (106) at one end of the fire-extinguishing magazine (107).

8. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: A first sealing rubber ring (109) is provided between the rear cover plate (110) and the magazine rear flange (108) at the other end of the fire extinguishing magazine (107).

9. The bag dust removal system pipeline fire extinguishing device according to claim 1 is characterized in that: The trigger wire (112) of the electrically triggered dry powder ball (114) is led out of the fire extinguishing magazine (107) through the wire outlet hole on the rear cover plate (110), and the trigger wire (112) is electrically connected to the connecting wire (2).

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