VOC (volatile organic compound) gas pipeline accessory with fire suppression and explosion prevention functions

Abstract

The utility model relates to a VOC (volatile organic compound) gas pipeline accessory with fire suppression and explosion prevention functions. The VOC gas pipeline accessory comprises a pipeline, a waste gas collecting hood, a branch pipe, a waste gas collecting hose, a temperature sensor, a pressure sensor, a gas component analyzer (combustible gas, methane, non-methane hydrocarbon, oxygen content and the like), a fire suppression material pipeline, an automatic valve with an interlocking function and a remote transmission alarm device. Through simple equipment transformation and operation adjustment, the device not only can analyze components of pipeline waste gas, monitor pressure and temperature parameters of the pipeline and set alarm values, and give an alarm when danger occurs and an alarm standard is reached, but also can interlock fire suppression materials such as inert gas with pressure to quickly enrich the space in the pipeline to suppress burning explosion, so that the safety of the pipeline is improved. The system can quickly and accurately respond to dangers, prevent accidents from happening and expanding, achieve source control of burning and explosion, effectively prevent burning and explosion accidents, or reduce accident loss, create safe rescue conditions and achieve reliable accident control effect.

Description

Technical Field

[0001] This patent application belongs to the field of chemical environmental protection equipment safety technology, and more specifically, it relates to a VOC gas pipeline accessory with fire suppression and explosion prevention functions. Background Art

[0002] VOC is the abbreviation of Volatile Organic Compounds, which means volatile organic compounds. It is usually divided into several categories, such as non-methane hydrocarbons (NMHCs), oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, and sulfur-containing organic compounds. VOC is an important precursor to urban haze and photochemical smog, and it is very harmful to the atmospheric environment. Most VOCs have a special odor that makes people uncomfortable, and some components are toxic, irritating, teratogenic, and carcinogenic, such as benzene, toluene, and formaldehyde.

[0003] The sources of VOC in the atmosphere mainly come from industrial exhaust gas, automobile exhaust gas generated by transportation, photochemical pollution and other links, especially coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing, storage, transportation and use. The treatment of VOC waste gas from industrial sources is the focus of current atmospheric environmental governance.

[0004] Most VOCs are explosive and flammable, and areas where unorganized pollution occurs, such as oil depots, are usually process fire-free zones with high safety conditions. Taking VOC gas transmission pipelines as an example, the design has strict concentration control on the components of the exhaust gas, and gas composition analysis instruments must be installed, such as isolating oxygen transmission, controlling the oxygen content in the exhaust gas to less than 2%, or controlling the VOC explosive components to less than the explosion limit. At the same time, fire protection distances are set along the pipeline to isolate fire sources, and explosion relief valves, flame arresters and other protective measures or devices are installed to control it as a key fire and explosion process link to reduce the risk of accidents.

[0005] Although the current VOC gas transmission pipelines and their accessories can play a certain monitoring and alarm function, they are unable to interlock fire suppression materials, cannot respond to danger quickly and accurately, and cannot prevent accidents from occurring and expanding. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a VOC gas pipeline accessory with fire suppression and explosion prevention functions, which can not only analyze the composition of pipeline exhaust gas, monitor the pressure and temperature parameters of the pipeline and set alarm values, and issue an alarm when danger occurs and the alarm standard is reached, but also interlock fire suppression materials such as pressurized inert gas to quickly fill the space in the pipeline to suppress combustion and explosion, so as to respond to danger quickly and accurately, curb the occurrence and expansion of accidents, and achieve source control of combustion and explosion.

[0007] In order to solve the above problems, the technical solution adopted by the utility model is:

[0008] A VOC gas pipeline accessory with fire suppression and explosion prevention function, applied near the inlet position of VOC waste gas, including a pipeline, a waste gas collecting hood at the bottom of the pipeline, a branch pipe connected to the waste gas collecting hood, a waste gas collection hose connected to the top of the branch pipe, a fire suppression material pipeline connected to the middle of the branch pipe, an automatic valve M located on the fire suppression material pipeline, and an instrument connected to the bottom of the branch pipe, wherein the automatic valve M is interlocked with a remote alarm device in the central control room;

[0009] The instrument is also interlocked with the central control room. The instrument includes but is not limited to one or more of a temperature sensor T, a pressure sensor P, and a gas composition analyzer. The gas composition analyzer is used to analyze combustible gas, methane, non-methane total hydrocarbons, oxygen content, etc.;

[0010] One end of the pipeline is connected to the material storage tank and the other end is connected to the tanker truck, and the exhaust gas collection hose is connected to the exhaust gas treatment facility;

[0011] The amount of fire suppressant material released into the fire suppressant material pipeline within 1 second shall fill the pipeline with a length of not less than 1m.

[0012] Furthermore, the pipeline is a crane pipe, and its material is aluminum alloy.

[0013] Furthermore, it also includes a traction device, which includes a traction rope, a fixed bracket, and a loading platform. The two ends of the traction rope are respectively connected to a crane pipe and a fixed bracket. The fixed bracket is located on the loading platform, and the loading platform is located on the ground and is provided with stairs.

[0014] Furthermore, there are multiple traction ropes, and the multiple traction ropes are arranged vertically.

[0015] Furthermore, the fire suppression material is one or more of pressurized nitrogen, carbon dioxide, inert gas, dry powder or fire fighting foam.

[0016] Furthermore, the temperature sensor T, the pressure sensor P, and the gas composition analyzer are all explosion-proof instruments.

[0017] Furthermore, there are two fire suppression material pipelines, which are distributed in the upper and middle parts of the branch pipes, with an air inlet diameter of φ10mm, an air inlet pressure of not less than 3.0Mpa, and a release amount within 1s filling the pipeline / crane pipe of not less than 2m in length.

[0018] Furthermore, the exhaust gas collecting hood is in a trumpet shape.

[0019] Furthermore, the remote alarm device is an audible and visual alarm.

[0020] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are:

[0021] This device will sound an alarm when there is a danger of explosion in the pipeline and the alarm standard is reached. At the same time, the fire suppression material is interlocked to quickly fill the space in the pipeline to suppress the explosion, so as to respond to the danger quickly and accurately, curb the occurrence and expansion of accidents, and create a relatively safe environment for subsequent processing. The structure is simple and easy to assemble. Through simple equipment modification and operation adjustment, it can effectively prevent explosion accidents or reduce accident losses, creating favorable conditions for safe rescue. It is convenient to modify existing equipment, quick to maintain and repair, reliable accident control effect, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of an embodiment device of the utility model.

[0024] Figure 3 Schematic diagram of the working process of an embodiment of the present utility model.

[0025] Among them: exhaust gas collecting hood 1, crane pipe 2, fire suppression material pipeline 3, exhaust gas collection hose 4, branch pipe 5, tanker 6, material storage tank 7, exhaust gas treatment facility 8, traction rope 9, fixed bracket 10, loading platform 11, automatic valve M, pressure sensor P, temperature sensor T, combustible gas detector Ex, oxygen detector O2. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the embodiments.

[0027] A VOC gas pipeline accessory with fire suppression and explosion prevention functions, suitable for the vicinity of the inlet position of VOC waste gas to achieve source control of combustion and explosion. Figure 1 , Figure 2 , including pipelines, exhaust gas collecting hood 1 at the bottom of the pipeline, branch pipe 5 connected to the exhaust gas collecting hood 1, exhaust gas collecting hose 4 connected to the top of branch pipe 5, fire suppression material pipeline 3 connected to the middle of branch pipe 5, automatic valve M located on the fire suppression material pipeline 3, instrument connected to the bottom of branch pipe 5, automatic valve M is interlocked with remote alarm device through the central control room. The pipeline is a crane pipe 2, which is made of aluminum alloy, the remote alarm device is an audible and visual alarm, and the exhaust gas collecting hood 1 is in the shape of a trumpet.

[0028] The instrument is also interlocked with the central control room. The instrument includes but is not limited to one or more of a temperature sensor T, a pressure sensor P, and a gas composition analyzer. The gas composition analyzer is used to analyze combustible gas, methane, non-methane total hydrocarbons or oxygen content, etc. The temperature sensor T, pressure sensor P, and gas composition analyzer are all explosion-proof instruments. Figure 2As can be seen in the figure, the gas component analyzer can be a combustible gas detector Ex and an oxygen detector O2. The central control room is an existing equipment room, and the linkage or interlocking between the remote alarm device, automatic valve M, temperature sensor T, pressure sensor P, combustible gas detector Ex, oxygen detector O2, etc. and the central control room is an existing technology and will not be repeated here.

[0029] One end of the pipeline is connected to the material storage tank 7, and the other end is connected to the oil tanker 6, and the exhaust gas collection hose 4 is connected to the exhaust gas treatment facility 8.

[0030] The fire suppression material is one or more of pressurized nitrogen, carbon dioxide, inert gas, dry powder or fire fighting foam. The amount of fire suppression material in the fire suppression material pipeline 3 filled within 1 second fills the pipeline for a length of not less than 1m.

[0031] like Figure 1 , and also includes a traction device, which includes a traction rope 9, a fixed bracket 10, and a loading platform 11. The traction rope 9 is connected to the crane pipe 2 and the fixed bracket 10 at both ends, respectively. The fixed bracket 10 is located on the loading platform 11, and the loading platform 11 is located on the ground and can be provided with stairs.

[0032] There are multiple traction ropes 9, and the multiple traction ropes 9 are arranged up and down. Figure 1 It can be clearly seen that there are two traction ropes 9, one is inclined and the other is horizontally connected between the crane pipe 2 and the fixed bracket 10.

[0033] Figure 2 In the embodiment, there are two fire suppression material pipelines 3, which are distributed in the upper and lower parts of the branch pipe (5), with an air inlet diameter of φ10 mm, an air inlet pressure of not less than 3.0 MPa, and a filling amount within 1 second of the filling pipeline / lift pipe 2 of not less than 2 m in length. Accordingly, there are also two sets of automatic valves M.

[0034] The fire suppression material of the utility model can be pressurized nitrogen, carbon dioxide, dry powder or fire foam, etc., depending on the use environment and the combustion characteristics of the waste gas material, taking into account the availability and cost of the material. When setting the fire suppression material injection point, the waste gas flow rate, waste gas flow rate, pipeline diameter, and pipeline length should be considered. It is advisable to arrange multiple points along the line and set appropriate injection pressure to ensure rapid contact, mixing and passivation. The amount of fire suppression material injected within 1 second is designed to fill the pipeline with a length of not less than 1m.

[0035] Temperature sensor T, pressure sensor P, gas composition analyzer and other instruments and valves are all explosion-proof instruments used in explosive environments.

[0036] In the example, a loading crane pipe in the oil depot area of ​​a coking plant was selected for transformation. Its basic parameters are: pipe diameter 80mm, aluminum alloy material, loading tar 25min per car (30T), loading light benzene 30min per car (33T)

[0037] It includes aluminum alloy pipelines, attached temperature sensors, pressure sensors, combustible gas analyzers, oxygen content analyzer O2, nitrogen pipelines and automatic valves M with interlocking functions, and remote alarm devices.

[0038] The working process is as follows: the explosive gas content and oxygen content in the pipeline (crane pipe 2) exceed the set standard and reach the explosion limit, the risk of explosion in the pipeline increases, or explosion has already occurred, resulting in a drastic change in pressure or temperature in the pipeline, triggering the remote alarm device to alarm, and the automatic valve M is started. Taking nitrogen and nitrogen valves as an example, nitrogen enters the explosion space of the fire suppression material pipeline 3 and the tanker 6 vehicle box and is fully mixed, reducing the risk of explosion or reducing the loss of explosion.

[0039] This device is installed at the front end of the exhaust gas collection hose 4 of the loading crane pipe 2. Considering the air volume of the exhaust gas collection hose 4 and the explosive materials carried in the tanker 6 below, the fire suppression material pipeline 3 containing nitrogen is put into two points, the air inlet diameter is φ10mm, and the length of the DN80mm crane pipe 2 is not less than 2m, and the nitrogen pressure is not less than 3.0Mpa.

[0040] Combination Figure 3 ,The overall working process of this device is,

[0041] When an alarm occurs: For example, if the gas composition exceeds the standard, causing pressure changes and sudden temperature rise;

[0042] Start accident control: monitor and alarm, open valves, and allow inert gas to enter the fire suppression material pipeline 3 to suppress combustion and explosion or reduce the risk of combustion and explosion;

[0043] Accident handling: staff handle accidents, eliminate hidden dangers or organize firefighting, and repair equipment;

[0044] Resume production: check and debug instruments, close the inert gas valve, and resume production.

[0045] From the above, it can be seen that this device can not only analyze the composition of pipeline exhaust gas, monitor the pressure and temperature parameters of the pipeline and set alarm values ​​through simple equipment modification and operation adjustment, but also issue an alarm when danger occurs and the alarm standard is reached. At the same time, it can also interlock fire suppression materials such as pressurized inert gas to quickly fill the space in the pipeline to suppress combustion and explosion, so as to respond to danger quickly and accurately, curb the occurrence and expansion of accidents, and achieve source control of combustion and explosion, thereby effectively preventing combustion and explosion accidents, or reducing accident losses, and creating conditions for safe rescue. The accident control effect is reliable and has extremely high promotion and application value.

Claims

1. A VOC gas pipeline accessory with fire suppression and explosion prevention functions, used near the inlet position of VOC waste gas, characterized by: It comprises a pipeline, an exhaust gas collecting hood (1) at the bottom of the pipeline, a branch pipe (5) connected to the exhaust gas collecting hood (1), an exhaust gas collecting hose (4) connected to the top of the branch pipe (5), a fire suppression material pipeline (3) connected to the middle of the branch pipe (5), an automatic valve M located on the fire suppression material pipeline (3), and an instrument connected to the bottom of the branch pipe (5), wherein the automatic valve M is interlocked with a remote alarm device through a central control room; The instrument is also interlocked with the central control room, and includes but is not limited to one or more of a temperature sensor T, a pressure sensor P, and a gas composition analyzer, wherein the gas composition analyzer is used to analyze the combustible gas, methane, non-methane total hydrocarbons or oxygen content; One end of the pipeline is connected to the material storage tank (7), and the other end is connected to the oil tanker (6), and the exhaust gas collection hose (4) is connected to the exhaust gas treatment facility (8); The amount of fire suppressant material in the fire suppressant material pipeline (3) filled within 1 second should fill the pipeline for a length of not less than 1 m.

2. A VOC gas pipeline accessory with fire suppression and explosion prevention function according to claim 1, characterized in that: The pipeline is a crane pipe (2) made of aluminum alloy.

3. A VOC gas pipeline accessory with fire suppression and explosion prevention function according to claim 2, characterized in that: It also includes a traction device, which includes a traction rope (9), a fixed bracket (10), and a loading platform (11). The traction rope (9) is connected to the crane pipe (2) and the fixed bracket (10) at both ends, respectively. The fixed bracket (10) is located on the loading platform (11), and the loading platform (11) is located on the ground.

4. The VOC gas pipeline accessory with fire suppression and explosion prevention function according to claim 3 is characterized in that: There are multiple traction ropes (9), and the multiple traction ropes (9) are arranged vertically.

5. The VOC gas pipeline accessory with fire suppression and explosion prevention function according to claim 1, characterized in that: The fire suppression material is one or more of compressed nitrogen, carbon dioxide, inert gas, dry powder or fire fighting foam.

6. A VOC gas pipeline accessory with fire suppression and explosion prevention functions according to any one of claims 1 to 5, characterized in that: The temperature sensor T, pressure sensor P and gas composition analyzer are all explosion-proof instruments.

7. A VOC gas pipeline accessory with fire suppression and explosion prevention function according to claim 6, characterized in that: The fire suppression material pipeline (3) consists of two pipes, which are distributed in the middle and upper part of the branch pipe (5) from top to bottom, and have an air inlet diameter of φ10 mm, an air inlet pressure of not less than 3.0 MPa, and a discharge volume within 1 second that fills the pipeline with a length of not less than 2 m.

8. The VOC gas pipeline accessory with fire suppression and explosion prevention function according to claim 6, characterized in that: The exhaust gas collecting hood (1) is in the shape of a trumpet.

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