Dust removal system with automatic fire extinguishing function

Abstract

The utility model relates to a dust removal system with an automatic fire extinguishing function, which belongs to the technical field of fire fighting equipment and comprises a sinter plate dust remover and an automatic fire extinguishing system. The automatic fire extinguishing system comprises a PLC (Programmable Logic Controller), a temperature sensor, a real-time alarm system, a water supply system and a spraying system; the temperature sensor and the water spraying system are arranged in the sinter plate dust remover; the water supply system is connected with the water spraying system through a water pipe; the signal input end of the PLC is connected with the signal output end of the temperature sensor, and the output end of the PLC is connected with the signal input end of the real-time alarm system and the water spraying system. Fireproof partition plates for dividing the interior of the sinter plate dust remover into a plurality of bins are arranged in the sinter plate dust remover, and the temperature sensors of all the bins are connected with the input end of the PLC; by arranging the automatic fire extinguishing system, temperature monitoring and automatic fire extinguishing of the sinter plate are achieved, the risk that the sinter plate is on fire is effectively reduced, and the safety of a dust removal system of a metallurgical enterprise is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire-fighting equipment, and in particular relates to a dust removal system with an automatic fire-extinguishing function. Background Art

[0002] In metallurgical production enterprises, during the production operation of Isa furnaces and reduction furnaces, the flue gas entering the environmental smoke collection system contains a small amount of reducing dust, such as lead ash and carbon particles. These dusts will enter the plastic-sintered plate dust collector and adhere to the plate surface of the plastic-sintered plate dust collector. If they are not cleaned in time, they will accumulate to a certain extent and will oxidize again, generating reaction heat. When the temperature of the reaction site rises, it is very easy to cause the plastic-sintered plate to burn. The combustion of the plastic-sintered plate causes a decrease in oxygen content and produces combustible gases, resulting in an increase in the content of CO and C particles, and enter the electrostatic precipitator. Once the explosion limit is reached, it will cause a huge safety risk.

[0003] Not only that, the plastic-fired board dust collector is relatively dense, and the internal structure is complex, and the mutual influence is large. Once combustion occurs, it will cause great safety hazards to the entire dust removal system. Not only that, due to the complex structure inside the plastic-fired board dust collector, once combustion occurs, it is difficult to extinguish the fire. And because there is a lot of dust in the plastic-fired board dust collector, when water is used to extinguish the fire, the dust in the plastic-fired board dust collector will clump, which not only blocks the plastic-fired board dust collector, but also is difficult to clean. Summary of the Invention

[0004] In order to overcome the problems existing in the background technology, the utility model provides a dust removal system with automatic fire extinguishing function. By setting up the automatic fire extinguishing system, the temperature monitoring and automatic fire extinguishing of the plastic-burned board are realized, which effectively reduces the risk of fire of the plastic-burned board and improves the safety of the dust removal system of the metallurgical enterprise.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] The dust removal system with automatic fire extinguishing function includes a plastic-fired board dust collector and an automatic fire extinguishing system; the automatic fire extinguishing system includes a PLC controller, a temperature sensor, a real-time alarm system, a water supply system and a spray system; the temperature sensor and the water spraying system are arranged in the plastic-fired board dust collector; the water supply system and the water spraying system are connected through a water pipe; the signal input end of the PLC controller is connected to the signal output end of the temperature sensor; the signal output end of the PLC controller is connected to the signal input end of the real-time alarm system and the water spraying system; a fireproof partition is provided in the plastic-fired board dust collector, which divides the plastic-fired board dust collector into multiple chambers, each chamber is equipped with a temperature sensor and a spray system, and the temperature sensor of each chamber is respectively connected to the input end of the PLC controller.

[0007] Preferably, the water supply system includes a water supply tank, a water supply pump and a water supply main; the inlet of the water supply pump is connected to the water supply tank, the water supply main is connected to the outlet of the water supply pump, and a water supply main valve is provided on the water supply main, which is normally open; the PLC controller is connected to the water supply pump signal.

[0008] Preferably, the spray system includes a water supply branch and a water mist nozzle arranged at the outlet of the water supply branch; the water supply branch of each compartment spray system is connected in parallel and respectively connected to the water supply main; an electric valve and a normally open valve are provided on the water supply branch; the signal output end of the PLC controller is connected to the electric valve signal; the water supply branch is also provided with a bypass pipe, and the bypass pipe is provided with a normally closed valve.

[0009] Preferably, the water mist nozzle is provided with a protective cover; the protective cover is covered on the water mist nozzle, and the protective cover and the joint of the water mist nozzle are connected by a metal wire.

[0010] Preferably, the water supply branch is arranged around the chamber, and a plurality of water mist nozzles are provided on the water outlet branch around the periphery of the chamber.

[0011] Preferably, the water mist nozzle is a spiral nozzle.

[0012] Preferably, the water supply branch is arranged around the chamber, and a plurality of water mist nozzles are provided on the water outlet branch around the periphery of the chamber.

[0013] Preferably, the alarm temperature of the temperature sensor is 45℃-59℃

[0014] Beneficial effects of the utility model:

[0015] Based on the characteristics of plastic-fired board dust collectors that dust accumulation is prone to fire caused by oxidation reactions, and the ignition point is uncertain, this utility model installs fireproof partitions in the plastic-fired board dust collector to divide it into different compartments, and installs temperature sensors and spray systems in each compartment to detect the operation of the plastic-fired board dust collector in different compartments and extinguish fires in different compartments. This solves the problem that the plastic-fired board dust collector is difficult to effectively extinguish due to its complex structure, and provides a guarantee for the safe operation of the plastic-fired board dust collector. At the same time, by extinguishing fire in different compartments, not only is water consumption reduced during fire extinguishing, but also precise fire extinguishing is achieved, reducing the impact of fire extinguishing on the entire plastic-fired board dust collector.

[0016] The automatic fire extinguishing system of the utility model can realize the automatic temperature detection and fire extinguishing of the plastic-burned plate dust collector by different zones, which not only reduces the amount of fire extinguishing water, but also reduces the workload of cleaning the plastic-burned plate dust collector after fire extinguishing, thereby minimizing the impact of fire extinguishing on the plastic-burned plate dust collector.

[0017] The utility model provides a protective cover on the water mist nozzle, which can effectively prevent dust from clogging the water mist nozzle and does not affect the fire extinguishing effect of the water mist nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the water supply system structure of the utility model;

[0019] Figure 2 This is a diagram showing the arrangement of the nozzles of the present invention in each chamber;

[0020] Figure 3 This is a schematic diagram of the structure of the nozzle and protective cover of the utility model;

[0021] In the figure, 1- plastic-sintered board dust collector, 2- temperature sensor, 3- fireproof partition, 4- water supply tank, 5- water supply pump, 6- water supply main pipe, 7- water supply branch, 8- electric valve, 9- normally open valve, 10- bypass pipe, 11- normally closed valve, 12- filter, 13- main water supply valve, 14- water mist nozzle, 15- plastic-sintered board dust collector silo, 16- water distribution pipeline, 17- protective cover, 18- metal wire. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "provided with" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0024] like Figure 1-3 As shown, the dust removal system with automatic fire extinguishing function includes a plastic sintered board dust collector 1 and an automatic fire extinguishing system.

[0025] A fireproof partition 3 is provided inside the plastic-sintered board dust collector 1, which divides the plastic-sintered board dust collector 1 into multiple chambers. Since the internal structure of the plastic-sintered board dust collector 1 is complex and the fire point is uncertain, dividing it into multiple chambers can reduce the monitoring and fire extinguishing range, realize zone monitoring and zone fire extinguishing, and not only reduce the amount of fire extinguishing water, but also reduce the workload of cleaning the plastic-sintered board dust collector after fire extinguishing, thereby minimizing the impact of fire extinguishing on the plastic-sintered board dust collector.

[0026] The automatic fire extinguishing system includes a PLC controller, a temperature sensor 2, a real-time alarm system, a water supply system and a spray system. The water supply system includes a water supply tank 4, a water supply pump 5 and a water supply main 6. Two water supply pumps 5 are set in parallel, one is on and the other is on standby. The inlet of the water supply pump 5 is connected to the water supply tank 4, and the water supply main is connected to the outlet of the water supply pump 5. The water supply main 6 is provided with a water supply main valve 13 and a filter 12. Two water supply main valves 13 are provided and are normally open. Two water supply main valves 13 are provided to facilitate fault inspection and maintenance. The spray system includes a water supply branch 7 and a water mist nozzle 14 provided at the outlet of the water supply branch. The water mist nozzle 14 is a spiral nozzle, and the water spray is mist water. The water supply branch 7 is arranged around each compartment (as shown in the attached Figure 2 ), and when the water supply manifold 7 is arranged around the chamber, the water mist nozzle 14 is also arranged around the chamber. According to the spraying area of the water mist nozzle, parallel water supply pipes can be added to achieve that the water spray of the water mist nozzle 14 can cover the entire chamber. According to the characteristics of the large amount of dust in the plastic-sintered board dust collector 1, the mist water not only has a small amount of water when extinguishing the fire, but also can moisten the dust, cover the fire point, improve the fire extinguishing efficiency, and reduce the amount of water used for fire extinguishing. Each chamber of the plastic-sintered board dust collector 1 is equipped with a temperature sensor 2 and a spray system. The water supply manifold 7 of the spray system of each chamber is connected in parallel and respectively connected to the water supply main 6. An electric valve 8 and a normally open valve 9 are provided on the water supply manifold 7. The water supply manifold is also provided with a bypass pipe 10. The bypass pipe 10 is arranged after the normally open valve 9. The bypass pipe 10 is provided with a normally closed valve 11. The normally closed valve 11 is mainly used to open the normally closed valve 11 for standby when the main pipe is blocked or other faults occur.

[0027] Temperature sensors 2 in each compartment are connected to a PLC controller. The PLC controller's signal output is connected to electric valves 8 and the real-time alarm system. The alarm temperature for temperature sensor 2 is 45°C. Exceeding this temperature indicates a fire risk. When the temperature drops below 45°C, it becomes safe, and the PCL control system shuts off the water supply and stops extinguishing the fire.

[0028] Description of the operation process of the automatic fire extinguishing system: When the temperature sensor 2 of a certain compartment detects that the temperature exceeds the alarm value, the signal is transmitted to the PLC controller. The PLC controller receives the over-temperature signal from the temperature sensor 2, starts the alarm, starts the water supply pump 5 and opens the electric valve 8 of the corresponding compartment to extinguish the fire in the corresponding compartment. When the temperature sensor 2 detects that the temperature is lower than the alarm value, the PLC controller receives the signal from the temperature sensor 2, closes the water supply pump 5 and the electric valve 8, and stops extinguishing the fire.

[0029] Due to the high dust content within the sintered board dust collector 1, each water mist nozzle 14 is fitted with a protective cover 17 to prevent clogging. The inner diameter of the protective cover 17 is larger than that of the spiral nozzle, but smaller than the outer diameter of the water mist nozzle's connector pipe. The protective cover 17 gently covers the connector pipe. To prevent the protective cover 17 from falling, a metal wire 18 connects the protective cover to the connector pipe. When the water mist nozzle is operating, the water outlet pressure of each nozzle (no less than 0.25 MPa) pushes the protective cover 17 open, effectively preventing dust without affecting the spray effect. After the fire is extinguished, the protective cover 17 is manually restored one by one and then re-installed on the water mist nozzle 14.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A dust removal system with automatic fire extinguishing function, characterized in that: It includes a plastic-sintered board dust collector and an automatic fire extinguishing system; the automatic fire extinguishing system includes a PLC controller, a temperature sensor, a real-time alarm system, a water supply system and a spray system; the temperature sensor and the water spray system are arranged in the plastic-sintered board dust collector; the water supply system and the water spray system are connected by a water pipe; the signal input end of the PLC controller is connected to the signal output end of the temperature sensor; the signal output end of the PLC controller is connected to the signal input end of the real-time alarm system and the water spray system; the plastic-sintered board dust collector is provided with a fireproof partition that divides the plastic-sintered board dust collector into multiple chambers, each chamber is equipped with a temperature sensor and a spray system, and the temperature sensor of each chamber is respectively connected to the input end of the PLC controller; The water supply system includes a water supply tank, a water supply pump and a water supply main; the inlet of the water supply pump is connected to the water supply tank, the water supply main is connected to the outlet of the water supply pump, and a water supply main valve is provided on the water supply main, which is normally open; the PLC controller is connected to the water supply pump signal; The spray system includes a water supply branch and a water mist nozzle arranged at the outlet of the water supply branch; the water supply branch of each compartment spray system is connected in parallel and respectively connected to the water supply main; the water supply branch is provided with an electric valve and a normally open valve; the signal output end of the PLC controller is connected to the electric valve signal; the water supply branch is also provided with a bypass pipe, and the bypass pipe is provided with a normally closed valve.

2. The dust removal system with automatic fire extinguishing function according to claim 1, characterized in that: The water mist nozzle is provided with a protective cover; the protective cover is covered on the water mist nozzle, and the protective cover and the joint of the water mist nozzle are connected by a metal wire.

3. The dust removal system with automatic fire extinguishing function according to claim 1, characterized in that: The water supply branch is arranged around the periphery of the chamber, and a plurality of water mist nozzles are arranged on the water outlet branch around the periphery of the chamber.

4. The dust removal system with automatic fire extinguishing function according to claim 2 or 3, characterized in that: The water mist nozzle is a spiral nozzle.

5. The dust removal system with automatic fire extinguishing function according to claim 1, characterized in that: The alarm temperature of the temperature sensor is 45°C-59°C.

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