Gas holder fire extinguishing device and method

Abstract

The invention discloses a gas cabinet fire extinguishing device and method, and relates to the technical field of gas cabinet fire fighting. The device comprises a carbon dioxide enrichment unit, a pressure regulating conveying unit and a cabinet top release unit; the carbon dioxide enrichment unit is used for enriching initial carbon dioxide gas from the furnace flue gas; the pressure regulating and conveying unit is connected with the carbon dioxide gas enriching unit and is used for regulating the pressure of the initial carbon dioxide gas to obtain pressure-released carbon dioxide gas and conveying the pressure-released carbon dioxide gas to the cabinet top releasing unit; and the cabinet top release unit is connected with the pressure regulating and conveying unit and is used for releasing or stopping releasing the pressure-released carbon dioxide gas into the gas cabinet. By means of the efficient closed-loop control enrichment, pressure regulation conveying and releasing system, safe and reliable carbon dioxide fire extinguishing in the gas holder is achieved, meanwhile, industrial waste gas is effectively utilized, carbon emission is reduced, and the operation stability and the intelligent level of the device are improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas tank fire protection, and more specifically, to a gas tank fire extinguishing device and method. Background Art

[0002] With the continuous development of industrial technology, gasholders, as important equipment for industrial gas storage, have been widely used in the steel, chemical and other industries. Gasholders are important facilities for storing industrial gas. Their function is to balance the imbalance between gas production and use and to ensure gas storage and transportation during production peak and trough periods. However, as major sources of danger, gasholders (such as coke oven gasholders, blast furnace gasholders, and converter gasholders) usually have a storage capacity of more than 700,000 cubic meters. Once a fire occurs, if it cannot be extinguished in time, it will lead to serious property losses and casualties. In particular, when a gas leak occurs inside a gasholder and causes a fire, how to quickly and effectively control the fire and avoid major property losses and casualties has become an industry problem that needs to be solved urgently.

[0003] In the related art, gas tanks are often equipped with external sprinkler fire-fighting facilities, which can achieve cooling and fire-fighting by spraying water on the outer wall of the gas tank; however, although this external water-spraying fire-fighting method is simple in technology, it cannot directly act on the fire source inside the gas tank, resulting in unsatisfactory fire-fighting effect; at the same time, the traditional water-spraying method may cause secondary accident risks such as the tilting of the gas tank piston, further increasing safety hazards. That is, the existing technology has the technical problems of low fire-fighting efficiency of gas tanks and untimely control of fire sources. Summary of the invention

[0004] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the detailed description. The summary of the invention of this application does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] The gas tank fire extinguishing device and method provided in the present application can achieve safe and reliable carbon dioxide fire extinguishing in the gas tank through an efficient closed-loop controlled enrichment, pressure-regulated delivery and release system, while effectively utilizing industrial waste gas to reduce carbon emissions and improving the operating stability and intelligence level of the device.

[0006] In a first aspect, the present application provides a gas tank fire extinguishing device, which includes: a carbon dioxide enrichment unit, a pressure regulating and conveying unit and a cabinet top release unit; the carbon dioxide enrichment unit is used to enrich initial carbon dioxide gas from furnace flue gas; the pressure regulating and conveying unit is connected to the carbon dioxide gas enrichment unit, and is used to adjust the pressure of the initial carbon dioxide gas to obtain depressurized carbon dioxide gas, and convey the depressurized carbon dioxide gas to the cabinet top release unit; the cabinet top release unit is connected to the pressure regulating and conveying unit, and is used to release or stop releasing the depressurized carbon dioxide gas into the gas tank.

[0007] In one embodiment, the gas tank fire extinguishing device also includes a gas storage unit; the gas storage unit is used to pressurize and store the initial carbon dioxide gas; the pressure regulating and conveying unit is connected to the carbon dioxide gas enrichment unit, including: the pressure regulating and conveying unit is connected to the carbon dioxide gas enrichment unit through the gas storage unit.

[0008] In one embodiment, the gas tank fire extinguishing device also includes a detection control unit; the detection control unit is used to detect the sensor signal in the gas tank, and control the cabinet top release unit to release or stop releasing the pressurized carbon dioxide gas into the gas tank according to the sensor signal.

[0009] In one embodiment, the detection control unit includes at least one temperature sensor and at least one carbon monoxide concentration sensor; the temperature sensors are evenly arranged on the upper position of the inner wall of the gas tank, and are used to detect the internal temperature of the gas tank; the carbon monoxide concentration sensor is evenly arranged on the inner wall of the gas tank, and is used to detect the internal carbon monoxide concentration of the gas tank.

[0010] In one embodiment, the cabinet top release unit includes an annular pipe, a nozzle assembly and a release valve; the annular pipe is spirally laid on the inner side of the top of the gas tank, and is used to transport the pressurized carbon dioxide gas; the nozzle assembly is evenly distributed on the annular pipe, and the spray direction of the nozzle assembly is toward the inside of the gas tank, and is used to release the pressurized carbon dioxide gas into the gas tank; the release valve is arranged at the air inlet of the annular pipe, and is used to control the release flow and release time of the pressurized carbon dioxide gas.

[0011] In one embodiment, the carbon dioxide enrichment unit includes a flue gas collection unit and a carbon dioxide separation unit; the flue gas collection unit is connected to the flue gas emission pipe of the furnace, and is used to collect the furnace flue gas containing carbon dioxide in the flue gas emission pipe; the carbon dioxide separation unit includes a filtering component and a separation component, the filtering component is used to filter particulate matter from the furnace flue gas, and the separation component is used to separate and enrich the initial carbon dioxide gas from the filtered furnace flue gas by chemical absorption, physical adsorption or membrane separation method.

[0012] In one embodiment, the pressure regulating and delivering unit includes a pressure regulating valve group and a delivery pipeline; the pressure regulating valve group is arranged at the gas outlet of the gas storage unit, and is used to control the release pressure of the initial carbon dioxide gas to obtain the depressurized carbon dioxide gas; the delivery pipeline is used to connect the gas storage unit with the annular pipeline.

[0013] In the second aspect, the present application also provides a gas tank fire extinguishing method, which is applied to the gas tank fire extinguishing device provided in the embodiment of the present application. The gas tank fire extinguishing method includes: in response to a fire extinguishing start signal, adjusting the pressure of the initial carbon dioxide gas through a pressure regulating and conveying device to obtain a depressurized carbon dioxide gas, wherein the initial carbon dioxide gas is enriched from the furnace flue gas; and releasing the depressurized carbon dioxide gas into the gas tank through a cabinet top release device.

[0014] In one embodiment, the gas tank fire extinguishing method further includes: in response to a stop fire extinguishing signal, stopping the release of the depressurized carbon dioxide gas into the gas tank through the cabinet top release device.

[0015] In one embodiment, the gas tank fire extinguishing method further includes: detecting the cabinet temperature and the cabinet carbon monoxide concentration in the gas tank by a detection control device; when the cabinet temperature is greater than a preset temperature and the cabinet carbon monoxide concentration is greater than a preset carbon monoxide concentration, triggering the start fire extinguishing signal, otherwise, triggering the stop fire extinguishing signal.

[0016] In summary, this application achieves efficient fire extinguishing by releasing carbon dioxide to dilute oxygen in the gas tank, effectively avoiding the inclination of the gas tank piston and secondary accidents that may be caused by the traditional water spray fire extinguishing method, and improving the safety and reliability of the gas tank fire extinguishing; the carbon dioxide in the furnace flue gas is effectively utilized through the carbon dioxide enrichment unit, reducing the direct emission of industrial waste gas, expanding the resource utilization path of carbon dioxide in steel enterprises, and helping enterprises to reduce carbon emissions; the pressure regulating and conveying unit can regulate the pressure of carbon dioxide to ensure that the pressure of carbon dioxide delivered to the gas tank is constant, which is conducive to the stable operation of the release device and further improves the working reliability of the device; this device realizes efficient closed-loop control from carbon dioxide enrichment to fire extinguishing release through the coordinated work of three units (enrichment, pressure regulating and conveying, and release) with clear division of labor. It is easy to operate, has a high degree of intelligent operation, and reduces the risk of manual operation. In summary, the gas tank fire extinguishing device provided by this application realizes safe and reliable carbon dioxide fire extinguishing in the gas tank through the enrichment, pressure regulating and conveying and release system of efficient closed-loop control, while effectively utilizing industrial waste gas to reduce carbon emissions, and improving the operating stability and intelligence level of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of the composition structure of a gas cabinet fire extinguishing device provided in an embodiment of the present application;

[0019] Figure 2 A flow chart of a gas cabinet fire extinguishing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] Terms in the specification, claims and drawings of this application, such as "first", "second", "third", "fourth", etc. (if any), are used to distinguish similar objects rather than to describe a specific order or sequence. Therefore, it is understood that these terms can be used interchangeably where appropriate, so that the described embodiments can be implemented in a different order unless otherwise specified in the diagram or description. In addition, the terms "is" and "has" and any variations thereof in this application are intended to cover all possible constituent elements on a non-exclusive basis. For example, a process, method, system, product or device comprising a number of steps or units is not necessarily limited to the steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed, or steps or units that are inherent to the process, method, product or device.

[0021] In this application, a "module" or "unit" refers to a computer program or a part of a computer program that has a specific function and works in conjunction with other related parts to achieve a predetermined goal. These modules or units can be implemented by software, hardware (such as processing circuits or memories), or a combination of the two. One or more processors or memories can implement one or more modules or units. At the same time, each module or unit can also be a part of a larger module or unit.

[0022] The technical solutions in the present application will be described in detail below in conjunction with the drawings in the embodiments. It should be noted that the described embodiments are only a part of the present application, not all embodiments. In the following description, the "some embodiments" mentioned are only subsets of all possible embodiments, which may be the same or different subsets, and different embodiments may be combined with each other without conflict.

[0023] Figure 1 Schematic diagram of a gas cabinet fire extinguishing device provided in an embodiment of the present application. Figure 1 The gas tank fire extinguishing device 10 provided in the embodiment of the present application may include a carbon dioxide enrichment unit 110, a pressure regulating and conveying unit 120 and a cabinet top release unit 130; the carbon dioxide enrichment unit 110 is used to enrich the initial carbon dioxide gas from the furnace flue gas; the pressure regulating and conveying unit 120 is connected to the carbon dioxide gas enrichment unit, and is used to adjust the pressure of the initial carbon dioxide gas to obtain the depressurized carbon dioxide gas, and convey the depressurized carbon dioxide gas to the cabinet top release unit 130; the cabinet top release unit 130 is connected to the pressure regulating and conveying unit 120, and is used to release or stop releasing the depressurized carbon dioxide gas into the gas tank.

[0024] Exemplarily, the carbon dioxide enrichment unit 110 is the gas source acquisition part of the entire gas tank fire extinguishing device 10, and its main function is to extract and enrich carbon dioxide from furnace flue gas. Furnace flue gas is the waste gas generated by furnaces in the production process in industrial places such as steel mills. Because furnace flue gas is a mixed gas containing multiple components, it contains carbon dioxide, but the concentration of carbon dioxide is relatively low and dispersed in other gases; the purpose of this unit is to separate carbon dioxide from this mixed gas and improve its purity and concentration so that it can be used as a fire extinguishing medium later. This not only makes use of the waste gas resources generated by the steel plant itself and reduces carbon dioxide emissions, but also provides an economical and environmentally friendly gas source for gas tank fire extinguishing; the initial carbon dioxide gas is the carbon dioxide obtained by preliminary separation and enrichment from the furnace flue gas through the carbon dioxide enrichment unit 110. The pressure regulating and conveying unit 120 is mainly responsible for regulating the carbon dioxide gas obtained from the carbon dioxide enrichment unit 110 to an appropriate pressure to meet the needs of gas tank fire extinguishing. Different gas tanks and different fire situations may require different carbon dioxide release pressures to ensure the stability of the carbon dioxide pressure during the fire extinguishing process to avoid excessive or low pressure causing adverse effects on the fire extinguishing effect and the gas tank; for different types of gas tanks: for example, the internal pressure of a coke oven gas tank is usually in the range of 5-7kPa, and the carbon dioxide release pressure can be 500kPa; the internal pressure of a blast furnace gas tank is usually in the range of 10-13kPa, and the carbon dioxide release pressure can be 600kPa; the internal pressure of a converter gas tank is usually in the range of 2-4kPa, and the carbon dioxide release pressure can be 450kPa; the initial carbon dioxide gas is converted into pressure-released carbon dioxide gas after being processed by the pressure regulating and conveying unit 120. The cabinet top release unit 130 is a key part that releases the pressure-regulated decompression carbon dioxide into the gas tank. Its main function is to release the carbon dioxide gas into the gas tank at a suitable flow rate, time and direction to realize the fire extinguishing operation inside the gas tank. The unit also has the function of controlling the release and stopping the release of carbon dioxide, so as to perform precise control according to the actual fire extinguishing situation, avoiding the waste of carbon dioxide or unnecessary impact on the environment inside the gas tank.

[0025] In summary, the embodiments of the present application achieve efficient fire extinguishing by releasing carbon dioxide to dilute oxygen in the gas tank, effectively avoiding the inclination of the gas tank piston and secondary accidents that may be caused by the traditional water spray fire extinguishing method, and improving the safety and reliability of gas tank fire extinguishing; the carbon dioxide in the furnace flue gas is effectively utilized by the carbon dioxide enrichment unit 110, the direct emission of industrial waste gas is reduced, the resource utilization path of carbon dioxide in steel enterprises is expanded, and it can help enterprises reduce carbon emissions; the pressure regulating and conveying unit 120 can regulate the pressure of carbon dioxide to ensure that the pressure of carbon dioxide delivered to the gas tank is constant, which is conducive to the stable operation of the release device and further improves the working reliability of the device; the device realizes efficient closed-loop control from carbon dioxide enrichment to fire extinguishing release through the coordinated work of three major units with clear division of labor (enrichment, pressure regulating and conveying, and release), which is easy to operate, has a high degree of intelligent operation, and reduces the risk of manual operation. In summary, the gas tank fire extinguishing device 10 provided in the embodiment of the present application realizes safe and reliable carbon dioxide fire extinguishing in the gas tank through an efficient closed-loop controlled enrichment, pressure-regulated delivery and release system, while effectively utilizing industrial waste gas to reduce carbon emissions and improving the operating stability and intelligence level of the device.

[0026] In some embodiments, the gas tank fire extinguishing device 10 also includes a gas storage unit; the gas storage unit is used to pressurize and store the initial carbon dioxide gas; the aforementioned pressure regulating and delivering unit 120 is connected to the carbon dioxide gas enrichment unit, including: the pressure regulating and delivering unit 120 is connected to the carbon dioxide gas enrichment unit through the gas storage unit.

[0027] Exemplarily, the gas storage unit plays a key role in buffering and reserve in the gas tank fire extinguishing device 10. On the one hand, the initial carbon dioxide gas initially obtained from the carbon dioxide enrichment unit 110 can be pressurized, and the gas can be compressed to a suitable high-pressure state for storage; in actual fire extinguishing scenarios, sudden and severe fire conditions may be faced, and a large amount of carbon dioxide needs to be released instantly to quickly suppress the fire. The pressurized stored carbon dioxide can meet this urgent and high-intensity gas demand; for example, when a large-scale, high-intensity fire occurs in the gas tank without warning, a large amount of stored and high-pressure carbon dioxide can be transported to the cabinet in a short time, quickly reducing the oxygen concentration and preventing the fire from spreading.

[0028] On the other hand, the gas storage unit can balance the gas supply stability of the entire fire extinguishing system; since the rate at which the carbon dioxide enrichment unit 110 separates carbon dioxide from the furnace flue gas may not be constant and will be affected by factors such as fluctuations in the furnace production conditions, the gas storage unit stores a certain amount of carbon dioxide gas to ensure that the pressure regulating and conveying unit 120 has a stable gas supply at all times, thereby avoiding fire extinguishing delays due to insufficient gas supply; the tank body of the storage unit can be made of high-strength, high-pressure and corrosion-resistant materials, such as special alloy steel, to ensure long-term, safe and reliable storage of high-pressure carbon dioxide gas, and prevent secondary hazards caused by gas leakage.

[0029] The pressure regulating and conveying unit 120 is connected to the carbon dioxide gas enrichment unit through the gas storage unit, thus constructing an efficient and orderly gas flow link; the carbon dioxide enrichment unit 110 continuously extracts initial carbon dioxide gas from the furnace flue gas and first conveys it to the gas storage unit; in the storage unit, the gas is pressurized and temporarily stored, while the pressure regulating and conveying unit 120 directly obtains the gas source from the gas storage unit, and accurately regulates the pressure of the high-pressure carbon dioxide gas output by the storage unit according to real-time fire extinguishing needs, such as different gas tank types, the severity of internal fires, etc.

[0030] Through the implementation of the above embodiments, a gas storage unit is added to store the initial carbon dioxide gas under pressure. On the one hand, it ensures that there is a sufficient amount of carbon dioxide gas at a suitable pressure state for standby, ensuring that there is a sufficient gas source when extinguishing a fire. On the other hand, the carbon dioxide enrichment unit 110 and the pressure regulating and conveying unit 120 are connected through the gas storage unit. The pressurized storage of the gas improves the resource utilization rate, makes the gas enrichment, storage and pressure regulating and conveying processes more closely connected, and further enhances the stability and reliability of the operation of the device.

[0031] In some embodiments, the gas tank fire extinguishing device 10 further includes a detection control unit, which is used to detect a sensor signal in the gas tank and control the cabinet top release unit 130 to release or stop releasing the depressurized carbon dioxide gas into the gas tank according to the sensor signal.

[0032] Exemplarily, the detection and control unit is used to monitor the internal environment of the gas tank in real time and collect key sensor signals; for example, the detection and control unit can be provided with a temperature sensor. Once the gas tank catches fire, the temperature inside the tank will inevitably rise sharply. Once the measured temperature exceeds the normal range, it can be determined that a fire has occurred in the gas tank, and then the cabinet top release unit 130 can be controlled according to the sensor signal to release or stop releasing the pressure-released carbon dioxide gas into the gas tank.

[0033] Through the implementation of the above embodiments, the detection control unit realizes real-time monitoring inside the gas cabinet, controls the release process through automated signal feedback, ensures that carbon dioxide is released only when needed, avoids waste of resources, improves the response speed and accuracy of fire extinguishing, and further enhances fire extinguishing efficiency and safety.

[0034] In some embodiments, the detection control unit includes at least one temperature sensor and at least one carbon monoxide concentration sensor; the temperature sensors are evenly arranged on the upper inner wall of the gas tank to detect the internal temperature of the gas tank; the carbon monoxide concentration sensors are evenly arranged on the inner wall of the gas tank to detect the internal carbon monoxide concentration of the gas tank.

[0035] Exemplarily, a thermocouple sensor or a thermistor sensor can be used as the temperature sensor of the embodiment of the present application; from the thermal principle, hot air has a natural tendency to flow upward, and the high temperature caused by the ignition of gas will cause the surrounding air to heat up rapidly. The hot air flow will quickly gather in the upper space of the gas holder with the heat of the flame. The temperature sensor is evenly arranged on the upper part of the inner wall of the gas holder, which can capture the temperature change at the fastest speed. An electrochemical carbon monoxide sensor is used as the carbon monoxide sensor of the embodiment of the present application; the carbon monoxide generated by gas leakage or combustion will gradually and evenly fill the entire internal space of the gas holder with the free diffusion of the gas. The carbon monoxide concentration sensor is evenly arranged on the inner wall of the gas holder, which can capture the change of carbon monoxide concentration in the gas holder without blind spots.

[0036] Through the implementation of the above embodiments, the fire hazard status in the gas tank can be reflected more comprehensively and accurately, and accurate data can be provided for the detection control unit to make the control more precise, thereby improving the reliability and sensitivity of the entire device.

[0037] In some embodiments, the cabinet top release unit 130 includes an annular pipe, a nozzle assembly and a release valve; the annular pipe is spirally laid on the inner side of the top of the gas tank, and is used to transport the pressurized carbon dioxide gas; the nozzle assembly is evenly distributed on the annular pipe, and the spray direction of the nozzle assembly is toward the inside of the gas tank, and is used to release the pressurized carbon dioxide gas into the gas tank; the release valve is arranged at the air inlet of the annular pipe, and is used to control the release flow and release time of the pressurized carbon dioxide gas.

[0038] Exemplarily, the annular pipe is a channel for conveying carbon dioxide gas. It is laid on the inner side of the top of the gas tank to form a closed loop to ensure that the gas can be evenly distributed to all corners of the gas tank; the annular pipe can be made of high-pressure resistant and corrosion-resistant materials, such as stainless steel; the pipe is designed in a spiral shape, which helps to increase the strength of the pipe and also facilitates the uniform distribution of carbon dioxide gas. The diameter and length of the pipe can be customized according to the size and shape of the gas tank to ensure smooth gas flow. The nozzle assembly is an injection device on the annular pipe, which is responsible for injecting the depressurized carbon dioxide gas into the interior of the gas tank in a specific direction and speed. The evenly distributed nozzles can ensure that the gas is evenly diffused in the cabinet, thereby effectively reducing the oxygen concentration and extinguishing the fire; the nozzle assembly can be fixed to the annular pipe by threading, welding or other mechanical connection methods. The release valve is a key component for controlling the release of carbon dioxide gas. It is located at the air inlet of the annular pipe and can adjust the gas flow and release time, thereby controlling the fire extinguishing process; the release valve can be an electric or pneumatic valve, which automatically opens or closes according to the control signal; for example, a ball valve or a butterfly valve can be used, which has good flow control characteristics and a long service life.

[0039] Through the implementation of the above embodiments, the design of the annular pipe and the nozzle assembly enables the carbon dioxide to evenly cover all areas in the gas tank, effectively dilute the oxygen to achieve efficient fire extinguishing, and ensure the comprehensiveness of the fire extinguishing; the release valve optimizes the utilization efficiency of carbon dioxide by controlling the flow and time, while enhancing the flexibility and adaptability of the device.

[0040] In some embodiments, the carbon dioxide enrichment unit 110 includes a flue gas collection unit and a carbon dioxide separation unit; the flue gas collection unit is connected to the flue gas emission pipe of the furnace, and is used to collect the furnace flue gas containing carbon dioxide in the flue gas emission pipe; the carbon dioxide separation unit includes a filtering component and a separation component, the filtering component is used to filter particulate matter from the furnace flue gas, and the separation component is used to separate and enrich the initial carbon dioxide gas from the filtered furnace flue gas by chemical absorption, physical adsorption or membrane separation method.

[0041] Exemplarily, the flue gas collection unit is a device for collecting flue gas containing carbon dioxide from the flue gas emission duct of the kiln. The flue gas collection unit can be located at the rear of the kiln and directly connected to the flue gas emission duct of the kiln. The flue gas collection unit can include a fan and a duct. The fan is used to extract the kiln flue gas, and the duct is used to transport the flue gas to the carbon dioxide separation unit. In order to ensure effective flue gas collection, temperature and pressure sensors can also be equipped to monitor the state of the kiln flue gas. The carbon dioxide separation unit is a device for separating and enriching carbon dioxide gas from the collected kiln flue gas. It can include a filter component and a separation component, which are responsible for removing particulate matter in the flue gas and separating carbon dioxide respectively. The filter component can use a bag filter, an electrostatic precipitator or other high-efficiency particulate filter to remove dust and other particulate matter in the flue gas. The separation component can use one of the following methods to achieve the separation and enrichment of carbon dioxide:

[0042] Chemical absorption: Use alkaline solution (such as MEA, MDEA, etc.) to absorb carbon dioxide in flue gas to form bicarbonate or carbonate, and then release the carbon dioxide by heating or reducing pressure.

[0043] Physical adsorption: Use solid adsorbents (such as activated carbon or zeolite) to adsorb carbon dioxide in flue gas, and then desorb the carbon dioxide by changing the temperature or pressure.

[0044] Membrane separation: The selective permeability of specific membrane materials is used to allow carbon dioxide gas to pass through while other gases are blocked, thereby achieving the separation of carbon dioxide.

[0045] Through the implementation of the above embodiments, carbon dioxide is collected and separated from the furnace flue gas, realizing the resource utilization of industrial waste gas, which not only reduces the impact of carbon dioxide emissions on the environment, but also provides a low-cost gas source for fire extinguishing equipment, which can help achieve carbon emission reduction goals.

[0046] In some embodiments, the pressure regulating and delivering unit 120 includes a pressure regulating valve group and a delivery pipeline; the pressure regulating valve group is arranged at the gas outlet of the gas storage unit, and is used to control the release pressure of the initial carbon dioxide gas to obtain the depressurized carbon dioxide gas; the delivery pipeline is used to connect the gas storage unit with the annular pipeline.

[0047] Exemplarily, a pressure regulating valve group is a device for regulating gas pressure, which may be composed of one or more pressure regulating valves, and is used to adjust the stored carbon dioxide gas to a pressure suitable for release to ensure fire extinguishing efficiency and safety; the pressure regulating valve group may include a main pressure regulating valve and several auxiliary pressure regulating valves, which may be spring-loaded or controlled by pneumatic or electric actuators. The main pressure regulating valve is responsible for reducing the high-pressure gas to a preset working pressure, while the auxiliary pressure regulating valve is used for precise regulation or as a safety backup. The delivery pipeline is a channel connecting the gas storage unit and the annular pipeline, and is used to deliver the pressure-regulated carbon dioxide gas to the release unit; the delivery pipeline may be made of pressure-resistant and corrosion-resistant materials such as stainless steel or aluminum alloy, and the diameter and wall thickness of the delivery pipeline are determined according to the flow rate and pressure of the delivered gas; the delivery pipeline may also be equipped with a flow meter, a pressure sensor, and a temperature sensor to monitor the state of the carbon dioxide gas.

[0048] Through the implementation of the above embodiments, the pressure regulating valve group is set at the gas outlet of the gas storage unit, which can accurately control the initial carbon dioxide gas release pressure, ensure that the output pressure-released carbon dioxide gas pressure meets the fire extinguishing requirements, and ensure the stable operation of the release device; the transmission pipeline connects the gas storage unit and the annular pipeline to achieve stable transmission of carbon dioxide from storage to release, which can ensure the continuity and reliability of the fire extinguishing process of the entire device.

[0049] Furthermore, the present application also provides a gas cabinet fire extinguishing method, which is implemented by applying the aforementioned device embodiment, such as Figure 2 As shown, the gas cabinet fire extinguishing method may include steps 201 to 202:

[0050] Step 201, in response to a fire extinguishing start signal, the pressure of the initial carbon dioxide gas is adjusted by a pressure regulating and conveying device to obtain a depressurized carbon dioxide gas, wherein the initial carbon dioxide gas is enriched from the furnace flue gas;

[0051] Exemplarily, when a fire extinguishing start signal is received, the pressure regulating valve group in the pressure regulating and conveying device is automatically adjusted to adjust the initial stored carbon dioxide gas pressure down to a preset fire extinguishing pressure, thereby obtaining a depressurized carbon dioxide gas suitable for release.

[0052] Step 202: releasing the depressurized carbon dioxide gas into the gas tank through the cabinet top release device.

[0053] Exemplarily, the pressure-regulated and decompressed carbon dioxide gas is delivered to the top of the gas tank through a delivery pipeline, and the release device on the top of the tank (such as a nozzle assembly and a release valve) is then opened to evenly release the carbon dioxide gas into the interior of the gas tank to achieve fire extinguishing.

[0054] Through the implementation of the above embodiments, the carbon dioxide resources in the furnace flue gas are fully utilized, which not only solves the problem of fire extinguishing gas source, but also realizes the reuse of industrial waste gas and reduces the additional fire extinguishing gas supply cost; at the same time, by adjusting the pressure of carbon dioxide gas, it can be ensured that carbon dioxide enters the gas tank in a suitable state to achieve the best fire extinguishing effect; the depressurized carbon dioxide gas is released into the gas tank through the cabinet top release device, which can directly act on the fire inside the gas tank, avoiding the problems that may be caused by traditional fire extinguishing methods such as piston tilting, secondary accidents, etc., thereby improving the safety and effectiveness of fire extinguishing.

[0055] In some embodiments, the gas tank fire extinguishing method further includes: in response to a stop fire extinguishing signal, stopping the release of depressurized carbon dioxide gas into the gas tank through a cabinet top release device.

[0056] Exemplarily, when the fire extinguishing operation is completed, or when the fire extinguishing operation needs to be stopped in some cases, the cabinet top release device will stop releasing carbon dioxide gas in response to a stop fire extinguishing signal. The stop fire extinguishing signal can be generated by automatic detection or manually operated.

[0057] Through the implementation of the above embodiments, the introduction of stop fire extinguishing signal control can stop the release of carbon dioxide in time according to the fire status in the gas tank, avoid excessive use of resources, reduce unnecessary waste, and ensure the efficiency of the fire extinguishing process and the rationality of resource utilization.

[0058] In one embodiment, the gas tank fire extinguishing method also includes: detecting the cabinet temperature and the carbon monoxide concentration in the gas tank by a detection control device; when the cabinet temperature is greater than a preset temperature and the carbon monoxide concentration in the cabinet is greater than a preset carbon monoxide concentration, triggering a start fire extinguishing signal, otherwise, triggering a stop fire extinguishing signal.

[0059] Exemplarily, a temperature sensor and a carbon monoxide concentration sensor are installed in the gas tank, and these sensors are connected to the detection and control device to transmit data in real time; the detection and control device is set with temperature and carbon monoxide concentration thresholds. When the temperature detected by the sensor exceeds the preset temperature (for example, 50°C) and the carbon monoxide concentration exceeds the preset carbon monoxide concentration (for example, 50ppm), the detection and control device will automatically activate the fire extinguishing system and send out a fire extinguishing start signal. If the temperature and carbon monoxide concentration detected by the sensor are both lower than these thresholds, the detection and control device will determine that there is no need to extinguish the fire, and will send out a signal to stop extinguishing the fire and turn off the carbon dioxide release device.

[0060] Through the implementation of the above embodiments, the gas tank fire extinguishing method can automatically trigger the start or stop fire extinguishing signal according to the specific status in the gas tank, ensure the timeliness and accuracy of the fire extinguishing operation, quickly respond to the early stage of the gas tank fire, effectively control the spread of the fire, and improve the fire extinguishing efficiency and gas tank safety.

[0061] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas tank fire extinguishing device, characterized in that: The gas cabinet fire extinguishing device comprises: a carbon dioxide enrichment unit, a pressure regulating and conveying unit and a cabinet top release unit; The carbon dioxide enrichment unit is used to enrich the initial carbon dioxide gas from the furnace flue gas; The pressure regulating and conveying unit is connected to the carbon dioxide gas enrichment unit, and is used to regulate the pressure of the initial carbon dioxide gas to obtain the decompressed carbon dioxide gas, and convey the decompressed carbon dioxide gas to the cabinet top release unit; The cabinet top release unit is connected to the pressure regulating and conveying unit, and is used for releasing or stopping the release of the pressure-released carbon dioxide gas into the gas cabinet.

2. The gas tank fire extinguishing device according to claim 1, characterized in that: The gas tank fire extinguishing device also includes a gas storage unit; The gas storage unit is used to pressurize and store the initial carbon dioxide gas; The pressure regulating and conveying unit is connected to the carbon dioxide gas enrichment unit and includes: The pressure regulating and conveying unit is connected to the carbon dioxide gas enrichment unit through the gas storage unit.

3. The gas tank fire extinguishing device according to claim 1, characterized in that: The gas tank fire extinguishing device also includes a detection control unit; The detection control unit is used to detect the sensor signal in the gas tank, and control the cabinet top release unit to release or stop releasing the depressurized carbon dioxide gas into the gas tank according to the sensor signal.

4. The gas tank fire extinguishing device according to claim 3, characterized in that: The detection control unit includes at least one temperature sensor and at least one carbon monoxide concentration sensor; The temperature sensors are evenly arranged at the upper part of the inner wall of the gas cabinet, and are used to detect the cabinet temperature inside the gas cabinet; The carbon monoxide concentration sensors are evenly arranged on the inner wall of the gas tank and are used to detect the carbon monoxide concentration in the gas tank.

5. The gas tank fire extinguishing device according to any one of claims 2 to 4, characterized in that: The cabinet top release unit comprises an annular pipeline, a spray head assembly and a release valve; The annular pipeline is laid in a spiral shape on the inner side of the top of the gas tank and is used to transport the depressurized carbon dioxide gas; The nozzle assemblies are evenly distributed on the annular pipe, and the spraying direction of the nozzle assemblies is toward the inside of the gas tank, so as to release the depressurized carbon dioxide gas into the gas tank; The release valve is arranged at the air inlet of the annular pipeline and is used to control the release flow rate and release time of the depressurized carbon dioxide gas.

6. The gas tank fire extinguishing device according to claim 5, characterized in that: The carbon dioxide enrichment unit includes a flue gas collection unit and a carbon dioxide separation unit; The fume collecting unit is connected to the fume exhaust pipe of the kiln and is used to collect the fume of the kiln containing carbon dioxide in the fume exhaust pipe; The carbon dioxide separation unit comprises a filter component and a separation component, wherein the filter component is used to filter particulate matter from the furnace flue gas, and the separation component is used to separate and enrich the initial carbon dioxide gas from the filtered furnace flue gas by chemical absorption, physical adsorption or membrane separation.

7. The gas tank fire extinguishing device according to claim 6, characterized in that: The pressure regulating and conveying unit comprises a pressure regulating valve group and a conveying pipeline; The pressure regulating valve group is arranged at the gas outlet of the gas storage unit, and is used to control the release pressure of the initial carbon dioxide gas to obtain the depressurized carbon dioxide gas; The delivery pipeline is used to connect the gas storage unit and the annular pipeline.

8. A gas tank fire extinguishing method, characterized in that: Applied to the gas cabinet fire extinguishing device according to any one of claims 1 to 7, the gas cabinet fire extinguishing method comprises: In response to a fire extinguishing start signal, the pressure of the initial carbon dioxide gas is adjusted by a pressure regulating and conveying device to obtain a depressurized carbon dioxide gas, wherein the initial carbon dioxide gas is enriched from the furnace fume; The depressurized carbon dioxide gas is released into the gas tank through a cabinet top release device.

9. The gas tank fire extinguishing method according to claim 8, characterized in that: The gas tank fire extinguishing method also includes: In response to the fire extinguishing stop signal, the cabinet top release device stops releasing the depressurized carbon dioxide gas into the gas cabinet.

10. The gas tank fire extinguishing method according to claim 9, characterized in that: The gas tank fire extinguishing method also includes: Detecting the temperature inside the gas cabinet and the carbon monoxide concentration inside the cabinet by means of a detection control device; When the temperature in the cabinet is greater than the preset temperature and the carbon monoxide concentration in the cabinet is greater than the preset carbon monoxide concentration, the start fire extinguishing signal is triggered; otherwise, the stop fire extinguishing signal is triggered.

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