A VOC explosion-proof flame arrester

Abstract

The present application is a VOC explosion-proof flame arrester, which is a three-stage structure as a whole, specifically including: crushable material sections at both ends and a fire-blocking section in the middle; air holes are through holes that penetrate the crushable material section and the fire-blocking section; a fire-blocking disc is arranged in the hole on the fire-blocking section; the crushable material section is movably connected to the fire-blocking section; the fire-blocking disc is a detachable multi-piece structure, the fire-blocking disc is composed of a plurality of fire-blocking sheets stacked together, and a fire-extinguishing gap is opened on the fire-blocking sheet, and the fire-extinguishing gaps of each fire-blocking sheet are arranged in an interlaced manner; the crushable material is pressed from particles with a particle size of 4-5mm, and the particle core is graphite polystyrene foam particles, and the particles are coated with silicate cement and fly ash. The present application creatively uses crushable materials to absorb the energy of the explosion in the pipeline, and cooperates with the fire-blocking disc, relying on the material performance, to better protect the pipeline, and the price is low, which is the best fire-blocking pipeline for VOC treatment and waste gas transportation.

Description

Technical field:

[0001] The present application relates to the field of hazardous waste gas treatment, and specifically to a VOC explosion-proof and fire-retardant pipeline made of thermosetting, flame-retardant, and static-free materials. Background technology:

[0002] Fires caused by flammable gases can be classified into the following types according to the form of flames: (1) Unrestricted deflagration, that is, uncontrollable deflagration, which usually occurs when flammable gases outside containers or equipment are ignited. For example, a local cloud of flammable gas may gather near the exhaust port or breathing valve of an oil storage tank; if there is a fire source, such as lightning strikes, cigarette butts or static sparks, the gas may be ignited, causing the flame wave to enter the equipment through the container outlet and cause combustion and explosion. (2) Restricted deflagration refers to when the flammable mixed gas in the pipeline is ignited, the flame wave front will be transmitted along the pipeline at a subsonic speed, which is called restricted deflagration. This situation may occur in science and technology industrial factories, chemical plants and various industries; for example, many underground coal mines produce flammable or toxic methane gas, which is often discharged through pipelines using blowers to supply boiler heating. When there is a problem with the boiler or the transmission system, the flammable gas in the pipeline may be ignited and flash back along the pipeline, causing an explosion underground. (3) Detonation refers to the situation where the flame explodes along the pipeline and after a certain distance, it propagates at supersonic speed and generates a shock wave. This is usually caused by turbulence caused by rough pipe walls, curved obstacles, valves and changes in pipe size, which accelerate the flame. If the flame continues to accelerate along the pipeline for a sufficient distance, an explosion may also occur.

[0003] According to the above fire situations, in the prior art, in order to ensure the safety of the system, emergency relief valves are usually installed at key locations to release the pressure when the system pressure or vacuum exceeds the set pressure of the valve. When overpressure occurs, the stressed valve core moves, releasing the seal between the valve seat and the valve core, allowing steam / gas to pass through the orifice of the valve, releasing the pressure or vacuum. Once the release is complete, the valve is re-closed and remains sealed.

[0004] On the other hand, according to the above fire situations, in the prior art, in order to ensure the safety of the system, explosion-proof flame arresters are installed on the pipeline. Explosion-proof flame arresters are divided into explosion-type and detonation-type flame arresters, which mainly rely on structural characteristics to buffer the explosion pressure to protect the pipeline. Due to its complex structure and the exponential growth of explosion pressure with the length and diameter of the pipeline, flame arresters for large-sized pipelines are "sky-high", which is difficult for many companies to accept. Summary of the invention:

[0005] Purpose of the invention:

[0006] The purpose of this application is to provide an innovative pipeline flame arrester that relies on the performance of special fragile materials to better and more economically protect pipelines.

[0007] Technical solution:

[0008] The present application is a VOC explosion-proof flame arrester, which is generally a three-stage structure, specifically including:

[0009] The crushable material sections at both ends and the fire-blocking section in the middle;

[0010] The pores are through holes that penetrate the crushable material section and the fire-blocking section;

[0011] A fire-blocking disk is arranged in the hole on the fire-blocking section;

[0012] The crushable material section is movably connected to the fire-blocking section;

[0013] The fire-blocking disc is a detachable multi-piece structure, and is formed by stacking a plurality of fire-blocking plates. The fire-blocking plates are provided with fire-extinguishing gaps, and the fire-extinguishing gaps of the fire-blocking plates are arranged in a staggered manner;

[0014] The crushable material is formed by pressing particles with a particle size of 4-5 mm, the core of the particles is graphite polystyrene foamed particles, and the outside of the particles is coated with silicate cement and fly ash.

[0015] The above-mentioned VOC explosion-proof flame arrester is preferably provided with a plurality of pores in a "honeycomb" shape. Furthermore, the pores are evenly distributed, and the number of the pores is 4, 7 or 9.

[0016] The above-mentioned VOC explosion-proof flame arrester is preferably: the fire-blocking section and the crushable material section are both cylindrical, the diameter of the fire-blocking section is smaller than the diameter of the crushable material section, the fire-blocking section is embedded in the crushable material sections on both sides, and the joints of the two crushable material sections are bonded by an adhesive.

[0017] The above-mentioned VOC explosion-proof flame arrester is preferably: the fire-blocking section and the crushable material section are both cylindrical, the diameter of the fire-blocking section is larger than the diameter of the crushable material section, and the crushable material section is embedded in the grooves on both sides of the fire-blocking section.

[0018] In the above-mentioned VOC explosion-proof flame arrester, preferably: the fire-blocking section is a "honeycomb"-shaped stainless steel disc with a plurality of air holes opened axially, and the fire-blocking disc is placed in the air holes.

[0019] In the above-mentioned VOC explosion-proof flame arrester, preferably: the particles of the crushable material are subjected to anti-static treatment.

[0020] Advantages and effects:

[0021] This application creatively uses crushable materials to absorb the energy of the explosion in the pipeline, quickly relieves pressure, and cooperates with fire-blocking disks to better protect the pipeline based on material properties. It is also inexpensive and is the best fire-blocking pipeline for VOC control and exhaust gas transportation.

[0022] This product has a reasonable structure, does not occupy space, is easy to modify or install on the existing system, and is suitable for promotion. Description of the drawings:

[0023] Figure 1 This is the overall structure diagram of this application, and the arrows in the figure indicate the direction of exhaust gas flow;

[0024] Figure 2 This is a schematic diagram of the structure in which the fire-blocking section of the present application is embedded in the crushable material section;

[0025] Figure 3 This is a schematic diagram of the structure in which the fire-blocking section of the present application is sleeved outside the crushable material section;

[0026] Figure 4 It is a schematic diagram of the structure of the fire barrier sheet in this application.

[0027] Note in the figure:

[0028] 1 crushable material section; 2 fire-retardant section; 3 air holes; 4 fire-retardant disk. Specific implementation method:

[0029] The technical idea of ​​the present application is to provide an explosion-proof and fire-blocking device arranged in a combustible exhaust gas pipeline. When deflagration, detonation, etc. occur in the pipeline, the device absorbs the impact force of the explosion through crushable materials and quickly releases pressure, thereby replacing the role of the pressure relief valve in conventional means. On the other hand, a fire-blocking disk is arranged between two sections of crushable materials to prevent the spread of flames.

[0030] The technical solution of this application is described below with several embodiments:

[0031] Example 1

[0032] In this example, the device is generally a three-section structure, specifically including:

[0033] The crushable material sections 1 at both ends and the fire-blocking section 2 in the middle; the function of the crushable material section is to absorb the kinetic energy of the explosion and quickly release the pressure.

[0034] The air hole 3 is a through hole that penetrates the crushable material section and the fire-blocking section;

[0035] A fire-blocking disk 4 is provided in the hole on the fire-blocking section;

[0036] The crushable material section is movably connected to the fire-blocking section;

[0037] The fire-blocking plate is a detachable multi-piece structure, which is composed of a plurality of fire-blocking plates stacked together. The fire-blocking plates are provided with fire-extinguishing gaps, and the fire-extinguishing gaps of the fire-blocking plates are arranged in a staggered manner, so as to facilitate disassembly, cleaning and maintenance. The function of the fire-blocking plate is to prevent combustion and diffusion in the pipeline.

[0038] The crushable material is formed by pressing particles with a particle size of 4-5 mm, the core of the particles is graphite polystyrene foamed particles, and the outside of the particles is coated with silicate cement and fly ash.

[0039] In this case, the crushable material must meet the following technical indicators:

[0040]

[0041] And the following antistatic and flame retardant indicators:

[0042]

[0043]

[0044] Example 2

[0045] This example adds the following technical features based on Example 1:

[0046] The VOC explosion-proof flame arrester is provided with a plurality of pores in a "honeycomb" shape. Further, the pores are evenly distributed, and the number of the pores is 4, 7 or 9.

[0047] The fire-blocking pipe is divided into three sections: crushable material section, fire-blocking plate, and crushable material section. The fire-blocking pipe adopts a honeycomb-shaped gas transportation method. The honeycomb shape can increase the contact area between the gas and the crushable material, better absorb the kinetic energy of the explosion, and make the pressure relief more uniform, reducing and averaging the pressure release in all directions, reducing subsequent damage.

[0048] Example 3

[0049] This example adds the following technical features based on Example 1:

[0050] The fire-blocking section and the crushable material section are both cylindrical, the diameter of the fire-blocking section is smaller than the diameter of the crushable material section, the fire-blocking section is embedded in the crushable material sections on both sides, and the joints of the two crushable material sections are bonded by an adhesive. The adhesive can be marble glue or a similar product. This structure conceals the fire-blocking section in the crushable material, has a stronger appearance, and is easier to install or adapt to the pipeline.

[0051] Example 4

[0052] This example is another connection form for Example 3, the diameter of the fire-blocking section is larger than the diameter of the crushable material section, and the crushable material section is embedded in the grooves on both sides of the fire-blocking section. Different from Example 3, the middle section of the finished product will have a protruding ring formed by the fire-blocking section, and the fire-blocking section plays a role similar to a connector, connecting the two crushable material sections in the middle. The connection strength is more reliable than that of Example 3, and it is also easier to replace the fire-blocking disc in the fire-blocking section.

[0053] Example 5

[0054] Based on other embodiments, the fire-blocking section is a "honeycomb" stainless steel disc with multiple pores in the axial direction, and a fire-blocking disc is placed in the pores. Stainless steel is an ideal material choice for the fire-blocking section, and a detachable fire-blocking disc is placed in the honeycomb pores.

[0055] Example 6

[0056] On the basis of the above embodiments, the crushable material is subjected to anti-static treatment.

Claims

1. A VOC explosion-proof flame arrester, characterized in that: It is a three-stage structure, including: The crushable material sections at both ends and the fire-blocking section in the middle; The pores are through holes that penetrate the crushable material section and the fire-blocking section; A fire-blocking disk is arranged in the through hole of the fire-blocking section; The crushable material section is connected to the fire-blocking section; The fire-blocking disc is a detachable multi-piece structure, and is formed by stacking a plurality of fire-blocking plates, each of which is provided with fire-blocking gaps, and the fire-blocking gaps of each fire-blocking plate are arranged in a staggered manner; The crushable material is formed by pressing particles with a particle size of 4-5 mm, the core of the particles is graphite polystyrene foam particles, and the particles are coated with silicate cement and fly ash; The tensile bonding strength of the crushable material is greater than or equal to 0.10 MPa, and the water absorption is less than or equal to 500 g / m 2 .

2. The VOC explosion-proof flame arrester according to claim 1, characterized in that: A plurality of air holes are opened on the VOC explosion-proof flame arrester, and the VOC explosion-proof flame arrester is in a "honeycomb" shape.

3. The VOC explosion-proof flame arrester according to claim 2, characterized in that: The number of the pores is 4, 7 or 9 which are evenly distributed.

4. The VOC explosion-proof flame arrester according to claim 1, characterized in that: The fire-blocking section and the crushable material section are both cylindrical, the diameter of the fire-blocking section is smaller than that of the crushable material section, the fire-blocking section is embedded in the crushable material sections on both sides, and the joints of the two crushable material sections are bonded by an adhesive.

5. The VOC explosion-proof flame arrester according to claim 1, characterized in that: The fire-blocking section and the crushable material section are both cylindrical, the diameter of the fire-blocking section is larger than the diameter of the crushable material section, and the crushable material section is embedded in the grooves on both sides of the fire-blocking section.

6. The VOC explosion-proof flame arrester according to claim 1, characterized in that: The fire-blocking section is a "honeycomb" stainless steel disc with a plurality of air holes opened in the axial direction, and the fire-blocking disc is placed in the air holes.

7. The VOC explosion-proof flame arrester according to claim 1, characterized in that: The granules of crushable materials are treated with anti-static treatment.

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