Fire extinguishing system controlled by laboratory waste gas purification device
By using nitrogen as the fire extinguishing agent medium in the laboratory exhaust gas purification device, the problem of insufficient water pressure in high-rise environments is solved, efficient fire extinguishing effect is achieved, and the system structure is simplified, cost and power consumption is reduced, while avoiding pollution of purification materials.
Patent Information
- Application Number
- CN202421188869.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The existing laboratory exhaust gas purification device control fire extinguishing system has insufficient water pressure in high-rise environments, making it difficult to achieve ideal fire extinguishing effects, and has complex structure, high cost and electricity consumption, and may lead to contamination of purification materials.
Nitrogen is used as the fire extinguishing agent medium, and fire extinguishing is controlled through a chain connection between solenoid valve and temperature inductor, which simplifies the system structure and avoids insufficient water pressure. Moreover, nitrogen will not react chemically with the purified material and avoids pollution.
It achieves efficient fire extinguishing effects, simplifies the system structure, reduces costs and power consumption, and avoids pollution of purified materials.
Smart Images
Figure CN222911876U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a waste gas treatment system, in particular to a laboratory waste gas purification device control fire extinguishing system. Background Art
[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.
[0003] The laboratory will produce organic waste gas during the product testing process and the experimental reagent preparation process. This type of organic waste gas is not only harmful to the health of personnel, but may also cause air pollution. In order to reduce the harm to personnel health and meet environmental safety requirements, the waste gas generated during the experiment is generally collected by opening the air valve of the laboratory fume hood, and then enters the activated carbon adsorption device through the air duct to adsorb the waste gas, and then the waste gas is exhausted by the induced draft fan and discharged in compliance with the standards.
[0004] The existing laboratory waste gas purification device control fire extinguishing system generally uses water to extinguish the fire directly. However, in the case of high floors, the water pressure for extinguishing the fire is insufficient, making it difficult to achieve the ideal fire extinguishing effect; or in other cases, some sensors fail and the fire extinguishing device is triggered by mistake, which may cause water to contaminate the purification materials for purifying waste gas in the box. At the same time, the existing laboratory waste gas purification device control fire extinguishing system has a complex structure, resulting in high cost and power consumption, and the cost of use is difficult to control.
[0005] Currently, there is no laboratory waste gas purification device controlled fire extinguishing system that can solve the above problems. Utility Model Content
[0006] The purpose of the utility model is to provide a laboratory waste gas purification device control fire extinguishing system, which can extinguish fires through nitrogen and has a simple and efficient structure and good energy-saving effect.
[0007] In order to achieve the above-mentioned purpose, the utility model discloses the following laboratory waste gas purification device control fire extinguishing system, wherein the laboratory waste gas purification device control fire extinguishing system comprises:
[0008] A box body, wherein a temperature sensor and a purification material for purifying exhaust gas are arranged inside the box body;
[0009] Two exhaust pipes, the two exhaust pipes are in communication with the box, wherein the first exhaust pipe and the second exhaust pipe are provided, the first exhaust pipe is provided at the upstream side of the box, the first exhaust pipe is connected to a fire damper, the second exhaust pipe is provided at the downstream side of the box, the second exhaust pipe is connected to a fan, and the second exhaust pipe is used to discharge the exhaust gas in the box;
[0010] A nitrogen pipe, the nitrogen pipe is in communication with the box, the nitrogen pipe is used to introduce nitrogen into the box, and the nitrogen pipe is connected to a solenoid valve;
[0011] A control device, wherein the control device is electrically connected to the temperature sensor, the fire damper, the solenoid valve, and the fan, and the control device controls the opening and closing of the fire damper, the solenoid valve, and the fan according to the temperature in the box monitored by the temperature sensor.
[0012] Furthermore, the first exhaust pipe is connected to the bottom of the box body, and the second exhaust pipe is connected to the top of the box body.
[0013] Furthermore, the end of the nitrogen pipe is arranged to penetrate the top position in the box body, and the nitrogen pipe is located on the center line of the box body.
[0014] Furthermore, it also includes a pressure sensor and a frequency converter, the pressure sensor is connected to the first exhaust pipe, the control device is electrically connected to the pressure sensor and the frequency converter, and the control device controls the frequency converter to change the speed of the fan according to the internal air pressure of the first exhaust pipe monitored by the pressure sensor.
[0015] Furthermore, it also includes a pressure difference sensor and an alarm, the pressure difference sensor is arranged in the box, the pressure difference sensor and the alarm are electrically connected, and the control device controls the opening and closing of the alarm according to the pressure difference in the box monitored by the pressure difference sensor.
[0016] Furthermore, it also includes a combustible gas detector, which is connected to the first exhaust pipe and electrically connected to the control device. The control device turns the alarm on and off according to the combustible gas content in the first exhaust pipe monitored by the combustible gas detector.
[0017] Furthermore, the purification material is activated carbon.
[0018] By means of the above technical solution, the beneficial effects of the utility model are as follows:
[0019] The laboratory waste gas purification device control fire extinguishing system of the utility model can be equipped with a nitrogen pipe above the box, use nitrogen as the fire extinguishing medium, and control the fire extinguishing through the interlocking of the solenoid valve and the temperature sensor, thereby avoiding the situation of insufficient water pressure and unsatisfactory fire extinguishing in the traditional laboratory waste gas purification device control fire extinguishing system, and the structure is simple, which can reduce the initial equipment investment. Moreover, compared with using water for fire extinguishing, during use, even if the solenoid valve fails and other reasons cause the action of the fire extinguishing system to be triggered by mistake, the nitrogen will not contaminate the purification material used to purify the waste gas in the box. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0021] Figure 1 It is a schematic diagram of a laboratory waste gas purification device control fire extinguishing system provided in an embodiment of this specification;
[0022] In the figure: 1. Box body; 11. Temperature sensor; 12. Pressure difference sensor; 2. First exhaust pipe; 21. Fire damper; 22. Pressure sensor; 23. Combustible gas detector; 3. Second exhaust pipe; 31. Fan; 4. Nitrogen pipe; 41. Solenoid valve; 5. Control device. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.
[0024] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.
[0025] See also Figure 1 , is a laboratory waste gas purification device control fire extinguishing system of this embodiment, which includes:
[0026] A box body 1, in which a temperature sensor 11 and a purification material for purifying exhaust gas are arranged;
[0027] Two exhaust pipes, the two exhaust pipes are in communication with the box body, wherein the first exhaust pipe 2 and the second exhaust pipe 3 are provided, the first exhaust pipe 2 is provided on the upstream side of the box body 1, the first exhaust pipe 2 is connected to a fire damper 21, the second exhaust pipe 3 is provided on the downstream side of the box body 1, the second exhaust pipe 3 is connected to a fan 31, and the second exhaust pipe 3 is used to discharge the exhaust gas in the box body 1;
[0028] A nitrogen pipe 4 is connected to the box body 1 and is used to introduce nitrogen into the box body 1. The nitrogen pipe 4 is connected to a solenoid valve 41;
[0029] The control device 5 is electrically connected to the temperature sensor 11, the fire damper 21, the solenoid valve 41, and the fan 31. The control device 5 controls the opening and closing of the fire damper 21, the solenoid valve 41, and the fan 31 according to the temperature in the box 1 monitored by the temperature sensor 11.
[0030] Through the above structure, when in use, if it operates normally, the exhaust gas enters from the most upstream port of the first exhaust pipe 2, and the fire damper 21 on the first exhaust pipe 2 is in the default open state. The exhaust gas flows through the fire damper 21 and enters the box 1 at the downstream end of the first exhaust pipe 2, and enters the second exhaust pipe 3 at the other end of the box 1 after passing through the box 1. The fan 31 in the second exhaust pipe 3 runs continuously by default, guiding the exhaust gas to be discharged from the upstream end of the second exhaust pipe 3 to the downstream end of the second exhaust pipe 3, and the solenoid valve 41 on the nitrogen pipe 4 connected to the box 1 remains closed, and nitrogen does not enter the box 1. If a fire occurs, first, the temperature sensor 11 in the box 1 senses the high temperature caused by the fire source. Since the temperature sensor 11, the fire damper 21, the solenoid valve 41, the fan 31 and the control device 5 are electrically connected together, after the temperature sensor 11 responds to the fire signal to the control device 5, the fire extinguishing operation of the exhaust gas is started, including: the fire damper 21 is turned from open to closed to intercept the exhaust gas and prevent the exhaust gas from continuing to enter the box 1 to promote the fire; the solenoid valve 41 is turned from closed to open to make the nitrogen pipe 4 communicate with the box 1, and the nitrogen pipe 4 The nitrogen in the box continuously enters the box 1, and with the help of nitrogen as a fire extinguishing agent medium, the oxygen concentration is reduced so that it does not support the further combustion of the exhaust gas; the fan 31 is turned from open to closed to avoid the airflow from guiding the fire to spread further; until the fire is extinguished, the temperature sensor 11 recognizes that the temperature in the box 1 has dropped significantly, and it is judged that the fire source is extinguished, and feedback is given to the control device 5, thereby turning the fire damper 21 from closed to open, the fan 31 from closed to open, and the solenoid valve 41 from open to closed, and only the previous exhaust gas emission treatment process is required.
[0031] In the above process, compared with the existing waste gas treatment system that uses water to extinguish fire, since the fire extinguishing medium uses nitrogen, the problem of poor fire extinguishing effect caused by insufficient water pressure when the laboratory is on a higher floor is avoided. At the same time, during the fire extinguishing process, after the nitrogen enters the box 1, due to the inert characteristics of the nitrogen itself, it will not react chemically with the purification material used to purify the waste gas in the box, thus avoiding the temperature sensor 11 and other misidentification of the fire source in some cases, mistakenly starting the fire extinguishing procedure, and the purification material being contaminated when the nitrogen is introduced, resulting in waste. In addition, the discharge of nitrogen is simple and easy, and can also be discharged through the second waste gas pipe 3. Compared with the traditional fire extinguishing using water as the fire extinguishing medium, the structure of the device is simpler, low-cost and easy to maintain.
[0032] For further information, see Figure 1 , the first exhaust pipe 2 is connected to the bottom of the box 1, and the second exhaust pipe 3 is connected to the top of the box 1. Specifically, when the exhaust gas flows from the first exhaust pipe 2 through the box 1 and enters the second exhaust pipe 3, the exhaust gas can pass through the entire box 1, so that the heavier particles in the exhaust gas can settle in the box 1 and be adsorbed by the purification material in the box 1 for purifying the exhaust gas, so that the filtering effect is better, and the main body of the exhaust gas is lighter. The exhaust method from bottom to top can have a higher exhaust efficiency, and fully realize the utilization of all the purification materials in the box 1.
[0033] Furthermore, the end of the nitrogen pipe 4 is arranged at the top position of the box 1, and the nitrogen pipe 4 is located on the center line of the box 1. Specifically, through the above structure, the nitrogen pipe 4 can penetrate the box 1, and the nitrogen discharged from the nitrogen pipe 4 can evenly cover the fire source, so as to improve the fire extinguishing efficiency of the fire extinguishing system of the laboratory waste gas purification device of the utility model.
[0034] Furthermore, it also includes a pressure sensor 22 and a frequency converter. The pressure sensor 22 is connected to the first exhaust pipe 2. The control device 5 is electrically connected to the pressure sensor 22 and the frequency converter. The control device 5 controls the frequency converter to change the rotation speed of the fan 31 according to the internal air pressure of the first exhaust pipe 2 monitored by the pressure sensor 22. Specifically, in the normal exhaust gas discharge process, when the flow rate / density of the exhaust gas entering the first exhaust pipe 2 is large, causing a large pressure on the first exhaust pipe 2, the pressure sensor 22 can drive the rotation speed of the fan 31 to increase after recognizing it, further accelerating the exhaust speed of the exhaust gas in the first exhaust pipe 2. On the contrary, when the flow rate / density of the exhaust gas entering the first exhaust pipe 2 is small, causing a small pressure on the first exhaust pipe 2, the pressure sensor 22 can drive the rotation speed of the fan 31 to decrease after recognizing it, so as to achieve the effect of saving electricity and energy.
[0035] Furthermore, it also includes a differential pressure sensor 12 and an alarm. The differential pressure sensor 12 is arranged in the box 1. The differential pressure sensor 12 and the alarm are electrically connected. The control device 5 controls the opening and closing of the alarm according to the differential pressure in the box 1 monitored by the differential pressure sensor 12. Specifically, in the process of normal exhaust gas discharge, the purification material used for purifying the exhaust gas in the box 1 will decrease its adsorption capacity after being saturated with a large amount of pollutants, resulting in a decrease in the filtration efficiency of the exhaust gas, and causing the differential pressure of the box 1 to exceed a preset value. The alarm issues a reminder, and the operator can intuitively judge whether the purification material needs to be replaced, which helps to improve maintenance efficiency.
[0036] Furthermore, a combustible gas detector 23 is included, and the combustible gas detector 23 is connected to the first exhaust pipe 2, and the combustible gas detector 23 is electrically connected to the control device 5, and the control device 5 controls the opening and closing of the alarm according to the combustible gas content of the first exhaust pipe 2 monitored by the combustible gas detector 23. Specifically, when a combustible gas leak occurs at the upstream end of the first exhaust pipe 2 during operation, the combustible gas detector 23 is set up, and the alarm is used to directly remind the operator, thereby improving the safety of the system operation environment.
[0037] Furthermore, in the present system, the purification material in the housing 1 is selected to be activated carbon, which has a highly developed pore structure, is highly versatile, and has a relatively low cost.
[0038] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described in the industry standards or embodiments, etc. Some industry standards or slightly modified implementation plans based on the implementation of the custom methods or embodiments can also achieve the same, equivalent or similar, or predictable implementation effects after deformation of the above embodiments. The embodiments of data acquisition, processing, output, judgment methods, etc. after these modifications or deformations can still fall within the scope of the optional implementation plans of this application.
[0039] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present application without departing from the spirit of the present application. It is intended that the attached embodiments include these modifications and changes without departing from the present application.
Claims
1. A laboratory waste gas purification device control fire extinguishing system; characterized in that, The laboratory waste gas purification device control fire extinguishing system includes: A box body, wherein a temperature sensor and a purification material for purifying exhaust gas are arranged inside the box body; Two exhaust pipes, the two exhaust pipes are in communication with the box, wherein the first exhaust pipe and the second exhaust pipe are provided, the first exhaust pipe is provided at the upstream side of the box, the first exhaust pipe is connected to a fire damper, the second exhaust pipe is provided at the downstream side of the box, the second exhaust pipe is connected to a fan, and the second exhaust pipe is used to discharge the exhaust gas in the box; A nitrogen pipe, the nitrogen pipe is in communication with the box, the nitrogen pipe is used to introduce nitrogen into the box, and the nitrogen pipe is connected to a solenoid valve; A control device, wherein the control device is electrically connected to the temperature sensor, the fire damper, the solenoid valve, and the fan, and the control device controls the opening and closing of the fire damper, the solenoid valve, and the fan according to the temperature in the box monitored by the temperature sensor.
2. The laboratory waste gas purification device control fire extinguishing system according to claim 1 is characterized in that: The first exhaust pipe is connected to the bottom of the box body, and the second exhaust pipe is connected to the top of the box body.
3. The laboratory waste gas purification device control fire extinguishing system according to claim 1 is characterized in that: The end of the nitrogen pipe is arranged through the top position of the box body, and the nitrogen pipe is located on the center line of the box body.
4. The laboratory waste gas purification device control fire extinguishing system according to claim 1 is characterized in that: It also includes a pressure sensor and a frequency converter, the pressure sensor is connected to the first exhaust pipe, the control device is electrically connected to the pressure sensor and the frequency converter, and the control device controls the frequency converter to change the rotation speed of the fan according to the internal air pressure of the first exhaust pipe monitored by the pressure sensor.
5. The laboratory waste gas purification device control fire extinguishing system according to claim 1 is characterized in that: It also includes a pressure difference sensor and an alarm. The pressure difference sensor is arranged in the box body. The pressure difference sensor and the alarm are electrically connected. The control device controls the opening and closing of the alarm according to the pressure difference in the box body monitored by the pressure difference sensor.
6. The laboratory waste gas purification device control fire extinguishing system according to claim 5 is characterized in that: It also includes a combustible gas detector, which is connected to the first exhaust pipe and electrically connected to the control device. The control device controls the opening and closing of the alarm according to the combustible gas content in the first exhaust pipe monitored by the combustible gas detector.
7. The laboratory waste gas purification device control fire extinguishing system according to claim 1 is characterized in that: The purification material is activated carbon.