Emergency cooling and fire extinguishing system of bag-type dust collector

Abstract

The utility model provides an emergency cooling and fire extinguishing system for a bag-type dust collector, which comprises the bag-type dust collector, a water pressure spraying device, a fire extinguishing system and an automatic emergency control system, and is characterized in that the water pressure spraying device comprises a plurality of spray gun sprayers, is arranged at the top of the bag-type dust collector and is used for covering the whole internal space of the bag-type dust collector; the fire-fighting system is connected with the water pressure spraying device through a fire-fighting pipeline and is used for providing stable fire-fighting water flow; the automatic emergency control system is used for monitoring the temperature and pressure of the bag-type dust collector in real time, and when the monitored value exceeds a set threshold value, the water pressure spraying device is triggered to conduct emergency cooling and fire extinguishing operation. According to the utility model, the reliability of safe and stable operation of the bag-type dust collector is improved, the safety coefficient of equipment is increased, the service life of the equipment is prolonged, and the accident rate of the equipment in an uncontrollable factor environment is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fire protection, specifically relating to an emergency cooling and fire extinguishing system for a bag filter dust collector. Background Technology

[0002] Under normal circumstances, dust-laden gas enters each unit chamber through the guide pipe. Under the action of the guide device, large dust particles are separated and fall directly into the ash (material) hopper, while the remaining dust is evenly distributed into the filtration zone of each chamber with the airflow. The filtered clean gas passes through the filter bags, the upper housing, the lifting valve, and the exhaust pipe before being discharged. As the filtration process continues, when the dust accumulation on the filter bag surface reaches a certain thickness, the dust removal control device (differential pressure, timed, or manual control) closes the lifting valve according to a set program, taking the current unit offline, and opens the electromagnetic pulse valve to blow away the dust from the filter bags. The powder falling into the ash (material) hopper is discharged through the ash (material) discharge valve and then sent out using the ash (material) conveying system.

[0003] In the event of a sudden power outage at the plant's primary power supply or a malfunction in the normal production electrical control system, all operating equipment will abruptly stop working. Simultaneously, the induced draft fan will cease operation. The existing hot air inside the baghouse dust collector (whose exterior is wrapped in insulation cotton) cannot be extracted or dissipated by the fan, causing a large accumulation of heat inside the collector. This could lead to the collector expanding or even bursting. Furthermore, it could cause the organic powders (such as protein powder) inside the collector to coke or denature, posing a safety hazard. In such situations, a set of equipment and technical measures is essential to eliminate these safety hazards and ensure the safety of equipment and personnel. Utility Model Content

[0004] The purpose of this invention is to provide an emergency cooling and fire extinguishing system for bag filters.

[0005] The technical solution of this utility model is as follows:

[0006] An emergency cooling and fire extinguishing system for a bag filter dust collector, the system comprising:

[0007] The system comprises a baghouse dust collector, a water pressure spray system, a fire protection system, and an automatic emergency control system. The water pressure spray system includes several spray nozzles installed on the top of the baghouse dust collector to cover its entire internal space. The fire protection system is connected to the water pressure spray system via fire hydrants to provide a stable flow of fire-fighting water. The automatic emergency control system monitors the temperature and pressure of the baghouse dust collector in real time; when the monitored values ​​exceed a set threshold, it triggers the water pressure spray system to perform emergency cooling and fire extinguishing operations.

[0008] Furthermore, the automatic emergency control system includes: a temperature sensor, a pressure sensor, a normally open solenoid valve, a power failure delay relay, a normally closed solenoid valve, and a battery; wherein, the temperature sensor and pressure sensor are used to monitor the temperature and pressure inside the bag filter, respectively; the normally open solenoid valve, the power failure delay relay, and the normally closed solenoid valve are used together to control the water flow in the fire hydrant, triggering the opening and closing of the fire escape when abnormal temperature or pressure is detected; the battery is used to provide emergency power.

[0009] Furthermore, the fire protection system includes a pressure-stabilizing pump, a fire pump, and a water storage tank, wherein the pressure-stabilizing pump is used to maintain stable water pressure in the fire protection pipeline; the fire pump is used to provide a large flow of water; and the water storage tank is used to store backup water.

[0010] Furthermore, the normally open solenoid valve, the power-off delay relay, and the normally closed solenoid valve are used together to control the water flow in the fire-fighting pipeline. When abnormal temperature or pressure is detected, the opening and closing of the fire escape route are triggered as follows:

[0011] Under normal circumstances, the normally open solenoid valve is always energized and is in the closed state, while the normally closed solenoid valve is energized and is in the open state. In abnormal situations, such as a sudden power outage, temperature exceeding the temperature limit detected by the temperature sensor, or pressure exceeding the alarm value detected by the pressure sensor, the normally open solenoid valve loses power and quickly opens the fire-fighting pipeline. Under pressure, water is sprayed from the fire-fighting pipeline into the bag filter dust collector through the water pressure sprinkler device. The normally closed solenoid valve closes after a period of time under the control of the time delay relay, shutting off the fire-fighting pipeline.

[0012] Furthermore, the diameter of the spray gun nozzle is 10mm-40mm, the water volume is 1-2m³ / h, and the spray angle is 30°-60°.

[0013] Furthermore, the pressure-stabilizing pump stabilizes the water pressure in the fire-fighting pipeline at 4-6 MPa.

[0014] Manual valves are used for routine maintenance.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This invention addresses the risk factors that prevent the internal heat of the bag filter from dissipating during sudden power outages or malfunctions of the normal production electrical control system, leading to the coking and denaturation of organic powder, as well as the expansion or even explosion of the filter housing. It improves the reliability of the bag filter's safe and stable operation, the safety factor of the equipment, and its service life, while reducing the accident rate when the equipment is in an uncontrollable environment. Attached Figure Description

[0017] The accompanying drawings illustrate various embodiments by way of example rather than limitation, and are used together with the description and claims to explain embodiments of the utility model. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0018] Figure 1 A schematic diagram of the system structure of this utility model is shown. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] This utility model provides an emergency cooling and fire extinguishing system for a baghouse dust collector. It prevents the organic powder (protein powder) from coking and denaturing, as well as the risk of casing expansion, explosion, and smoldering in the event of a sudden power outage or high internal temperature of the filter bags. This reduces uncontrollable risks and future maintenance costs, improving the company's safety in production. It also ensures the safe operation and service life of the equipment.

[0021] Specifically, the water pressure spray system consists of a number of spray guns with diameters ranging from Φ10mm to Φ40mm, inserted from the top of the bag filter housing. The spray guns are connected to fire hydrants via pipes, and the spray volume is approximately 1-2 cubic meters per second. 3 / h. A normally open solenoid valve and a normally closed solenoid valve are installed in the middle of the connecting pipeline.

[0022] The automatic emergency control system includes: temperature sensor, pressure sensor, normally open solenoid valve, power failure delay relay, normally closed solenoid valve, battery and manual valve;

[0023] The fire-fighting water, maintained at a pressure of 4-6 MPa by the pressure-stabilizing pump, cannot be sprayed into the dust collector. In the event of a sudden power outage or failure of the plant's primary power supply, or if the normal production electrical control system malfunctions or temperature and pressure sensors detect abnormalities, the normally open electrically controlled valve loses power and opens. Under pressure, the fire-fighting water is sprayed into the bag filter to absorb heat and rapidly cool it, ensuring the safety of the bag filter. The normally closed solenoid valve, controlled by a time-delay relay, closes after a certain period, automatically shutting off the fire-fighting water flow and preventing prolonged spraying of fire-fighting water into the bag filter, thus avoiding water waste and excessive water accumulation inside the bag filter.

[0024] The storage battery is connected in parallel with the primary power supply. The primary power supply provides power to the electrical equipment of the fire protection system while simultaneously charging and storing energy in the storage battery. When the primary power supply suddenly fails, the storage battery can simultaneously feed back electrical energy to the relevant electrical equipment and maintain the normal operation of the system for a period of time.

[0025] The electrically controlled valve is equipped with a manual valve at the front end. This is for the purpose of routine maintenance or replacement of the electrically controlled valve.

[0026] The fire protection system includes a pressure-stabilizing pump, a fire pump, and a water storage tank. The pressure-stabilizing pump is used to maintain stable water pressure in the fire protection pipeline; the fire pump is used to provide a large flow of water; and the water storage tank is used to store backup water.

[0027] Example 1

[0028] When the plant's primary power supply suddenly fails, all electrical equipment stops operating. Specifically, both the forced draft fan and the induced draft fan stop working simultaneously. (Approximately 472m) 3 The baghouse dust collector, with its limited volume, accumulates hot dust at 80-100℃ that cannot be discharged. Simultaneously, a large amount of protein powder and suspended protein particles accumulate at the bottom of the chamber and cannot be discharged in time. Electrically, in the event of a power outage, the battery automatically switches to power supply mode to maintain the normal operation of the automatic control system. When the temperature and pressure sensors detect excessive temperature and pressure, the normally open solenoid valve de-energizes, opens, and the connected fire-fighting water is rapidly sprayed into the chamber at a pressure of 4-6 MPa. Simultaneously, the battery supplies power to the power-off delay relay and the normally closed solenoid valve. After 30-60 seconds, the power-off delay relay de-energizes the normally closed solenoid valve. The normally closed solenoid valve closes, cutting off the fire-fighting water supply and stopping the spraying of water into the baghouse dust collector. The temperature inside the baghouse dust collector cools down from approximately 80-100℃ to approximately 40-50℃. This prevents thermal expansion of the chamber, protects the baghouse dust collector, and prevents protein powder denaturation. At the same time, it effectively prevents excessive water in the box from wetting the bottom of the box and the original protein powder in the collection pipes, or from being washed away by the water flow, thus preventing economic losses.

[0029] Example 2:

[0030] Based on the technical parameters of the baghouse dust collector system in Example 1, if the organic powder raw material pump fails and the raw material supply stops, the blower and induced draft fan will also stop operating under the automatic control system of the baghouse dust collector, preventing heat dissipation from the inside of the baghouse dust collector. Similarly, the emergency cooling and fire extinguishing system of the baghouse dust collector will activate, spraying fire-fighting water into the chamber to rapidly cool it down. This protects the baghouse dust collector and reduces production hazards.

[0031] Example 3:

[0032] Based on the technical parameters of the baghouse dust collector system in Example 1, when the filter bags of the baghouse dust collector detach and block the discharge port, organic powder will accumulate in the hopper. Under long-term operation, the more powder accumulates, the more hot air continues to pass through, causing smoldering of the powder, which will prevent the heat inside the baghouse dust collector from dissipating. Similarly, the emergency cooling and fire extinguishing system of the baghouse dust collector is activated, spraying fire-fighting water into the tank to quickly cool it down. This protects the baghouse dust collector and reduces production hazards.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An emergency cooling and fire extinguishing system for a bag filter, characterized in that, The system comprises: The bag-type dust collector, the water pressure spraying device, the fire fighting system, and the automatic emergency control system, wherein the water pressure spraying device comprises a plurality of spray gun nozzles installed on the top of the bag-type dust collector for covering the entire internal space of the bag-type dust collector; the fire fighting system is connected with the water pressure spraying device through a fire fighting pipeline for providing stable fire fighting water flow; and the automatic emergency control system is used for monitoring the temperature and pressure of the bag-type dust collector in real time, and triggering the water pressure spraying device to perform emergency cooling and fire extinguishing operation when the monitoring value exceeds the set threshold value.

2. The bag filter emergency cooling and fire extinguishing system according to claim 1, characterized in that, The automatic emergency control system comprises a temperature sensor, a pressure sensor, a normally open electromagnetic valve, a power-off delay relay, a normally closed electromagnetic valve, and a storage battery, wherein the temperature sensor and the pressure sensor are respectively used for monitoring the temperature and pressure inside the bag-type dust collector; the normally open electromagnetic valve, the power-off delay relay, and the normally closed electromagnetic valve are collectively used for controlling the water flow of the fire fighting pipeline, and triggering the opening and closing of the fire fighting pipeline when an abnormal temperature or pressure is monitored; and the storage battery is used for providing emergency power.

3. The bag filter emergency cooling and fire extinguishing system according to claim 1, characterized in that, The fire fighting system comprises a constant pressure pump, a fire fighting pump, and a water storage tank, wherein the constant pressure pump is used for maintaining the water pressure in the fire fighting pipeline stable; the fire fighting pump is used for providing a large flow water source; and the water storage tank is used for storing a standby water source.

4. The bag filter emergency cooling and fire extinguishing system according to claim 2, characterized in that, The normally open electromagnetic valve, the power-off delay relay, and the normally closed electromagnetic valve are collectively used for controlling the water flow of the fire fighting pipeline, and triggering the opening and closing of the fire fighting pipeline when an abnormal temperature or pressure is monitored, specifically as follows: Under normal circumstances, the normally open electromagnetic valve is always powered, and the valve is in a closed state when powered; the normally closed electromagnetic valve is powered, and the valve is in an open state; when an abnormal state such as sudden power failure, temperature exceeding the standard detected by the temperature sensor, or pressure greater than the alarm value detected by the pressure sensor occurs, the normally open electromagnetic valve loses power and rapidly opens the fire fighting pipeline, water is sprayed into the bag-type dust collector through the water pressure spraying device under the action of pressure, and the normally closed electromagnetic valve is closed after a period of time under the control of the delay relay to close the fire fighting pipeline.

5. The bag filter emergency cooling and fire extinguishing system according to claim 1, characterized in that, The diameter of the spray gun nozzle is 10-40 mm, the water spraying amount is 1-2 m 3 / h, and the spraying angle is 30-60°.

6. The bag filter emergency cooling and fire extinguishing system according to claim 3, characterized in that, The constant pressure pump stabilizes the water pressure in the fire fighting pipeline at 4-6 Mpa.

7. The bag filter emergency cooling and fire extinguishing system according to claim 1, characterized in that, The system further comprises a manual valve, and the manual valve is used for daily maintenance.

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