Active emergency fire extinguishing system

Abstract

The utility model discloses an active emergency fire extinguishing system which is characterized in that a waste gas pressure detector group, a first waste gas temperature detector group, a first fire fighting water pipeline, a cold air pipeline and a first quick-closing valve are sequentially arranged on a waste gas pipeline on the upstream of a waste gas fan from the waste gas fan; a second waste gas temperature detector group, a second fire-fighting water pipeline and a drain valve are sequentially arranged on the waste gas pipeline at the downstream of the waste gas fan from the waste gas fan; and a heat accumulating type thermal oxidation furnace is arranged at the downstream end point of the waste gas fan. According to the system, active pipeline fire extinguishing and alarming can be carried out according to the detection result, equipment damage caused by too high local temperature is prevented, an operator is reminded of emergency treatment, the gradient difference of the temperature of the waste gas pipeline is obtained through temperature detection distributed at equal intervals, the detection result is more accurate, and sudden combustion in the waste gas pipeline is easier to find.

Description

Technical Field

[0001] This application relates to the field of fire protection technology, and particularly to an active emergency fire extinguishing system. Background Art

[0002] As an indispensable key equipment in modern industrial production, impregnating machines are widely used in multiple fields such as electronics, chemical industry, automotive, and aerospace. Its core function is to uniformly and effectively coat or impregnate liquid materials (such as resins, paints, glues, etc.) on the surface of workpieces through a specific process to enhance the physical properties, corrosion resistance of the workpieces or achieve specific surface effects.

[0003] During the production process of impregnating machines, exhaust gases containing volatile organic compounds (VOCs), particulate matter, and other harmful components will inevitably be generated. In order to protect the environment, meet emission standards, and ensure production safety, these exhaust gases need to be specially treated. Currently, it is an efficient and widely used solution to send the exhaust gases generated by impregnating machines into a TRTO (Thermal Regenerative Thermal Oxidizer) for pyrolysis treatment through an exhaust gas fan. The TRTO furnace converts combustible and harmful substances in the exhaust gas into harmless carbon dioxide and water vapor through high-temperature oxidation reactions, and at the same time uses highly efficient heat storage materials to recover and store the heat generated during the combustion process to achieve energy recycling, improve treatment efficiency, and reduce operating costs.

[0004] Although the TRTO furnace pyrolysis treatment technology has shown significant advantages in exhaust gas purification, it still faces certain challenges in actual applications. Especially when the ignition temperature of combustibles in the exhaust gas is relatively low, due to the possible electrostatic discharge phenomenon in the impregnating machine production line, the generated electrostatic sparks are sufficient to ignite these low-ignition-point combustible exhaust gases under certain conditions. Once the exhaust gas is ignited in the pipeline or the exhaust gas preheater, it will spread rapidly and cause local or large-scale combustion, which may not only seriously damage the exhaust gas treatment equipment, but also lead to production safety accidents such as fires and explosions. Summary of the Utility Model

[0005] The embodiments of this application provide an active emergency fire extinguishing system to solve the problem that in the prior art, after the exhaust gas is ignited in the pipeline or the exhaust gas preheater, it may seriously damage the exhaust gas treatment equipment and cause production safety accidents such as fires and explosions.

[0006] On the one hand, the embodiments of this application provide an active emergency fire extinguishing system, including:

[0007] Exhaust gas fan, on the exhaust gas pipeline upstream of the exhaust gas fan, starting from the exhaust gas fan, an exhaust gas pressure detector group, a first exhaust gas temperature detector group, a first fire water pipeline, a cold air pipeline, and a first quick shut-off valve are sequentially arranged. On the exhaust gas pipeline downstream of the exhaust gas fan, starting from the exhaust gas fan, a second exhaust gas temperature detector group, a second fire water pipeline, and a steam trap are sequentially arranged. A regenerative thermal oxidizer is arranged at the downstream end of the exhaust gas fan. A normally closed pneumatic proportional valve is arranged on the cold air pipeline. A first pneumatic quick shut-off valve is arranged on the first fire water pipeline. A second pneumatic quick shut-off valve is arranged on the second fire water pipeline. Multiple groups of temperature detector groups are arranged on the exhaust gas pipeline between the second fire water pipeline and the regenerative thermal oxidizer. The multiple groups of temperature detector groups are equidistantly distributed. The exhaust gas pressure detector group, the first exhaust gas temperature detector group, the second exhaust gas temperature detector group, the multiple groups of temperature detector groups, the first quick shut-off valve, the first pneumatic quick shut-off valve, the second pneumatic quick shut-off valve, the normally closed pneumatic proportional valve, and the steam trap are signal-connected to the controller of the regenerative thermal oxidizer.

[0008] In a possible implementation manner, the exhaust gas pressure detector group includes a pressure indicating transmitter, a pressure alarm interlock device, and a pressure gauge. A pressure indicating meter is arranged on the pressure indicating transmitter.

[0009] In a possible implementation manner, both the first exhaust gas temperature detector group and the second exhaust gas temperature detector group include a temperature indicating transmitter, a temperature alarm interlock device, and a thermometer. A temperature indicating meter is arranged on the temperature indicating transmitter.

[0010] In a possible implementation manner, each of the multiple groups of temperature detector groups includes a temperature indicating transmitter and a thermometer.

[0011] In a possible implementation manner, a temperature alarm threshold is arranged on the temperature alarm interlock device, and the temperature alarm threshold is adjusted through the temperature alarm interlock device.

[0012] An active emergency fire extinguishing system in the present application has the following advantages:

[0013] (1) It can perform active pipeline fire extinguishing and alarm according to the detection results, prevent equipment damage caused by excessive local temperature, and remind the operator to handle it emergently.

[0014] (2) By obtaining the temperature gradient difference of the exhaust gas pipeline through equidistant temperature detection, the detection result is more accurate, and it is easier to detect sudden combustion in the exhaust gas pipeline. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of an active emergency fire extinguishing system provided by an embodiment of the present application. Detailed implementation manners

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0018] Figure 1 It is a schematic flowchart of an active emergency fire extinguishing system provided by an embodiment of the present application; an embodiment of the present application provides an active emergency fire extinguishing system, including:

[0019] Exhaust gas fan 1, an exhaust gas pressure detector group 2, a first exhaust gas temperature detector group 3, a first fire water pipeline 4, a cold air pipeline 5 and a first quick shut-off valve 6 are sequentially arranged on the exhaust gas pipeline upstream of the exhaust gas fan 1 starting from the exhaust gas fan 1. On the exhaust gas pipeline downstream of the exhaust gas fan 1, a second exhaust gas temperature detector group 7, a second fire water pipeline 8 and a steam trap 9 are sequentially arranged starting from the exhaust gas fan 1. A regenerative thermal oxidizer 10 is arranged at the downstream end of the exhaust gas fan 1. A normally closed pneumatic proportional valve 51 is arranged on the cold air pipeline 5. A first pneumatic quick shut-off valve 41 is arranged on the first fire water pipeline 4. A second pneumatic quick shut-off valve 81 is arranged on the second fire water pipeline 8. Multiple groups of temperature detector groups 82 are arranged on the exhaust gas pipeline between the second fire water pipeline 8 and the regenerative thermal oxidizer 10. The multiple groups of temperature detector groups 82 are evenly distributed. The exhaust gas pressure detector group 2, the first exhaust gas temperature detector group 3, the second exhaust gas temperature detector group 7, the multiple groups of temperature detector groups 82, the first quick shut-off valve 6, the first pneumatic quick shut-off valve 41, the second pneumatic quick shut-off valve 81, the normally closed pneumatic proportional valve 51 and the steam trap 9 are signal-connected to the controller of the regenerative thermal oxidizer 10. The exhaust gas pressure detector group 2 includes a pressure indicating transmitter, a pressure alarm interlock device and a pressure gauge. A pressure indicating table is arranged on the pressure indicating transmitter. Both the first exhaust gas temperature detector group 3 and the second exhaust gas temperature detector group 7 include a temperature indicating transmitter, a temperature alarm interlock device and a thermometer. A temperature indicating table is arranged on the temperature indicating transmitter. Each of the multiple groups of temperature detector groups 82 includes a temperature indicating transmitter and a thermometer. A temperature alarm threshold is arranged on the temperature alarm interlock device. The temperature alarm threshold is adjusted through the temperature alarm interlock device.

[0020] Exemplarily, when the regenerative thermal oxidizer 10 is operating normally, the normally closed pneumatic proportional valve 51 upstream of the exhaust gas fan 1 is closed and the first quick shut-off valve 6 is in the open state. The exhaust gas is sent into the regenerative thermal oxidizer 10 through the exhaust gas fan 1 for high-temperature treatment. At this time, the real-time temperature and real-time pressure upstream of the exhaust gas fan 1 fluctuate within the normal range.

[0021] When the controller of the regenerative thermal oxidizer 10 detects that the temperature before the exhaust gas fan is greater than the high-temperature alarm threshold here through the temperature detection device of the exhaust gas pipeline, or detects that the pressure before the exhaust gas fan is greater than the high-pressure alarm threshold here through the pressure detection device of the exhaust gas pipeline, the controller delays starting (the purpose of the delay is to prevent misoperation of the controller caused by instantaneous fluctuations in the temperature detection or pressure detection acquisition values) the alarm to remind the operator to handle it in time. Then the controller forcibly shuts down the burner ignition and exits the regenerative thermal oxidizer 10 (if the combustion engine is in the ignition process). At the same time, the controller opens the normally closed pneumatic proportional valve 51 of the cold air pipeline 5, closes the first quick shut-off valve 6, and then opens the first pneumatic quick shut-off valve 41 of the first fire water pipeline 4 to actively extinguish the fire. Inside the regenerative thermal oxidizer 10 at this time, the controller controls the exhaust gas fan and the exhaust gas fan 1 of the regenerative thermal oxidizer 10 to increase the power to reduce the temperature of the exhaust gas pipeline and prevent equipment damage caused by excessive local temperature.

[0022] When one or more of the multiple groups of the temperature detector groups 82 detect that the temperature gradient change exceeds the preset threshold of the exhaust gas temperature, the controller delays (the purpose of the delay is to prevent misoperation of the control system caused by instantaneous fluctuations in the temperature detection acquisition values) to issue an alarm and repeats the aforementioned fire-fighting and cooling operations to reduce the temperature of the exhaust gas pipeline near the regenerative thermal oxidizer 10 section and prevent equipment damage caused by excessive local temperature. Finally, the fire-fighting water in the exhaust gas pipeline will be discharged through the steam trap 9.

[0023] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0024] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An active emergency fire extinguishing system, characterized in that: include: An exhaust fan (1), wherein an exhaust gas pressure detector group (2), a first exhaust gas temperature detector group (3), a first fire water pipeline (4), a cold air pipeline (5) and a first quick-closing valve (6) are sequentially arranged on the exhaust gas pipeline upstream of the exhaust gas fan (1), a second exhaust gas temperature detector group (7), a second fire water pipeline (8) and a drain valve (9) are sequentially arranged on the exhaust gas pipeline downstream of the exhaust gas fan (1), a regenerative thermal oxidation furnace (10) is arranged at the downstream end of the exhaust gas fan (1), a normally closed pneumatic proportional valve (51) is arranged on the cold air pipeline (5), a first pneumatic quick-closing valve (56) is arranged on the first fire water pipeline (4), and a second pneumatic quick-closing valve (57) is arranged on the second fire water pipeline (4). A shut-off valve (41), a second pneumatic quick-closing valve (81) is arranged on the second fire water pipeline (8), a plurality of temperature detector groups (82) are arranged on the exhaust gas pipeline between the second fire water pipeline (8) and the regenerative thermal oxidizer (10), the plurality of temperature detector groups (82) are equidistantly distributed, an exhaust gas pressure detector group (2), a first exhaust gas temperature detector group (3), a second exhaust gas temperature detector group (7), a plurality of temperature detector groups (82), the first quick-closing valve (6), the first pneumatic quick-closing valve (41), the second pneumatic quick-closing valve (81), the normally closed pneumatic proportional valve (51) and the steam trap (9) are connected to the controller of the regenerative thermal oxidizer (10) by signal.

2. An active emergency fire extinguishing system according to claim 1, characterized in that: The exhaust gas pressure detector group (2) comprises a pressure indicating transmitter, a pressure alarm interlocking device and a pressure gauge, and the pressure indicating transmitter is provided with a pressure indicating gauge.

3. An active emergency fire extinguishing system according to claim 1, characterized in that: The first exhaust gas temperature detector group (3) and the second exhaust gas temperature detector group (7) both comprise a temperature indicating transmitter, a temperature alarm interlocking device and a temperature meter, and the temperature indicating transmitter is provided with a temperature indicating meter.

4. An active emergency fire extinguishing system according to claim 1, characterized in that: The plurality of temperature detector groups (82) each include a temperature indicating transmitter and a temperature meter.

5. An active emergency fire extinguishing system according to claim 3, characterized in that: The temperature alarm interlocking device is provided with a temperature alarm threshold, and the temperature alarm threshold is adjusted by the temperature alarm interlocking device.

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