A barrier explosion-proof device for accidental combustion and explosion of explosives and energetic materials

Abstract

The application discloses a barrier explosion-proof device for accidental combustion and explosion of explosives and energetic materials, which is arranged in a mixing device and above a slurry in the mixing device. The barrier explosion-proof device comprises two layers of barrier nets which are detachably arranged on the inner wall of the mixing device and are attached to the inner wall of the mixing device. A plurality of dense barrier particles are filled between the two layers of barrier nets, and a gas passing channel is formed between adjacent dense barrier particles. The high-temperature and high-pressure gas generated by the slurry in the mixing device during combustion and explosion is dissipated through the gas passing channel. The barrier explosion-proof device is arranged in the mixing device and above the slurry in the mixing device. Once the slurry combusts and explodes, a large amount of high-temperature and high-pressure gas is absorbed by the barrier explosion-proof device and the shock wave is damped, so that the pressure of the gas reaching the top of the tank is greatly reduced, thereby slowing down the harm of the combustion and explosion accident.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof device technology, and in particular to an explosion-proof device for preventing accidental combustion and explosion of flammable and explosive materials. Background Technology

[0002] Current mixing devices for explosives are mostly closed reaction vessels or kneaders equipped with stirring devices. As the components of the explosives are added, the slurry gradually becomes viscous, the friction increases, and the risk of combustion and explosion is greatly increased.

[0003] Therefore, there is an urgent need to provide an explosion-proof device to mitigate the harm of combustion and explosion accidents. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof device to prevent accidental combustion and explosion of flammable and explosive materials, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides an explosion-proof device for preventing accidental combustion and explosion of explosive materials. The device is disposed within a mixing device and located above the slurry within the mixing device. The device comprises two layers of barrier mesh, which are detachably installed on the inner wall of the mixing device and adhered to the inner wall. A plurality of dense barrier particles are filled between the two layers of barrier mesh, and air passages are formed between adjacent dense barrier particles. The high-temperature, high-pressure gas generated during combustion and explosion of the slurry in the mixing device is dissipated through these air passages.

[0006] Preferably, the dense barrier particles are metal particles, and the barrier mesh is a metal mesh.

[0007] Preferably, the distance between the two barrier nets is 5cm-20cm.

[0008] Preferably, the cross-sectional area of ​​a single air passage is 0.01 cm². 2 -0.05cm 2 .

[0009] Preferably, the density of the dense barrier particles is 2.0 g / cm³. 3 -3.0g / cm 3 .

[0010] Preferably, an energy-absorbing layer is provided between the two barrier meshes, the dense barrier particles are disposed on both sides of the energy-absorbing layer, and the energy-absorbing layer is provided with gaps for gas to pass through.

[0011] Preferably, the energy-absorbing layer is composed of a plurality of non-metallic elastic particles.

[0012] Preferably, the energy-absorbing layer is made of one of polyurea, resin, ultra-high molecular weight polyethylene, or polyurethane.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects: The explosion-proof barrier device provided by this invention is installed inside the mixing device and located above the slurry inside the mixing device. Once the slurry ignites and explodes, a large amount of high-temperature and high-pressure gas will be absorbed by the energy of the explosion-proof barrier device and the shock wave will be attenuated by the shock wave. The pressure when it reaches the top of the tank will be greatly reduced, thereby mitigating the harm of the explosion accident. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the explosion-proof barrier device of the present invention; Figure 2 An experimental apparatus for a sealed detonator to verify the explosion-proof effect of the present invention; Figure 3 These are the test results from the embodiments of the present invention; In the diagram: 1. Barrier mesh; 2. Dense barrier particles; 3. Gas passage; 4. Energy absorption layer; 5. Oscilloscope; 6. Sealed igniter; 7. 12V power supply; 8. Pressure sensor; 9. Ignition head. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] This invention provides an explosion-proof device for preventing accidental combustion and explosion of explosive materials. The device is installed inside a mixing device and located above the slurry inside the mixing device. The device includes two layers of barrier nets 1, which are detachably installed on the inner wall of the mixing device and are in close contact with the inner wall of the mixing device. A plurality of dense barrier particles 2 are filled between the two layers of barrier nets 1, and air passages 3 are formed between adjacent dense barrier particles 2. The high-temperature and high-pressure gas generated when the slurry in the mixing device explodes is dissipated through the air passages 3.

[0018] Furthermore, the dense barrier particles 2 are metal particles, and the barrier mesh 1 is a metal mesh.

[0019] Furthermore, the distance between the two barrier nets 1 is 5cm-20cm.

[0020] Furthermore, the cross-sectional area of ​​a single air passage 3 is 0.01 cm². 2 -0.05cm 2 .

[0021] Furthermore, the density of the dense barrier particles 2 is 2.0 g / cm³. 3 -3.0g / cm 3 .

[0022] Furthermore, an energy-absorbing layer 4 is provided between the two barrier nets 1, and dense barrier particles 2 are provided on both sides of the energy-absorbing layer 4. The energy-absorbing layer 4 is provided with gaps for gas to pass through.

[0023] Furthermore, the energy-absorbing layer 4 is composed of several non-metallic elastic particles.

[0024] Furthermore, the energy-absorbing layer 4 is made of one of the following materials: polyurea, resin, ultra-high molecular weight polyethylene, or polyurethane.

[0025] The explosion-proof device for preventing accidental combustion and explosion of explosive materials provided by this invention utilizes the mutual contact of dense barrier particles 2, with the gaps between the dense barrier particles 2 forming an air passage 3. When the slurry in the mixing device undergoes combustion and explosion, the high-temperature and high-pressure gas generated collides within the air passage 3, thereby achieving the purpose of energy dissipation. Furthermore, by setting an energy-absorbing layer 4 composed of non-metallic elastic particles inside the explosion-proof device, not only can the energy of the high-temperature and high-pressure gas be further dissipated, but the normal passage of the high-temperature and high-pressure gas is not affected. Therefore, the explosion-proof device provided by this invention can mitigate the hazards of combustion and explosion accidents.

[0026] Example The explosion-proof effect of the explosion-proof device provided in this invention was verified by using a closed-circuit explosion test apparatus.

[0027] The closed-circuit explosive device experimental apparatus includes an oscilloscope 5, a closed-circuit explosive 6, a 12V power supply 7, a pressure sensor 8, and an ignition head 9. The explosive is a mixture of ammonium perchlorate and aluminum powder prepared by dry mixing, wherein the mass ratio of ammonium perchlorate to aluminum powder is 69:31.

[0028] Before the experiment, aluminum powder and ammonium perchlorate were dried in separate vacuum drying ovens. The ammonium perchlorate was slowly ground in a mortar and pestle and passed through a 60-mesh sieve. The sieved ammonium perchlorate was then sealed in a sealed bag to prevent secondary moisture absorption. 0.69g of ammonium perchlorate and 0.31g of aluminum powder were weighed and dry-mixed using a weighing balance. The electric igniter 9 and the mixture of aluminum powder and ammonium perchlorate were wrapped in aluminum foil and placed in a sealed igniter 6. The oscilloscope 5 and the battery of the igniter 9 were connected. When the oscilloscope 5 was displaying the result, the igniter 9 was powered on to ignite the mixture. The oscilloscope 5 then displayed the measurement result.

[0029] Three sets of comparative experiments were conducted. In one set, a dense, tightly packed aluminum alloy sphere was placed near the pressure sensor 8, and the same drug was ignited to measure the pressure change. In another set, a relatively loose, loosely packed aluminum alloy mesh was placed near the pressure sensor 8, and the same drug was ignited to measure the pressure change. The last set was a control group. The test results are shown in Table 1.

[0030] Table 1: Test Results of Metal Mesh and Metal Balls Comparison of the data from the three experiments shows that metallic barrier materials have a good effect on suppressing explosions, but the explosion-suppressing effect mainly depends on the filling density of the metallic material. In the experiment with aluminum alloy metal spheres, due to the high filling density, the maximum pressure decreased by nearly half; while in the experiment with aluminum alloy metal mesh, due to the lower filling density, the pressure was almost unaffected.

[0031] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for preventing accidental combustion and explosion of flammable and explosive materials, characterized in that, The explosion-proof barrier device is installed inside the mixing device and located above the slurry inside the mixing device; the explosion-proof barrier device includes two layers of barrier nets (1), the barrier nets (1) are detachably installed on the inner wall of the mixing device, and the barrier nets (1) are attached to the inner wall of the mixing device; a number of dense barrier particles (2) are filled between the two layers of barrier nets (1), and an air passage (3) is formed between adjacent dense barrier particles (2), and the high temperature and high pressure gas generated by the slurry in the mixing device when it explodes is dissipated through the air passage (3); The dense barrier particles (2) are metal particles, and the barrier mesh (1) is a metal mesh; The distance between the two barrier nets (1) is 5cm-20cm; The cross-sectional area of ​​a single air passage (3) is 0.01 cm². 2 -0.05cm 2 ; The density of the dense barrier particles (2) is 2.0 g / cm³. 3 -3.0g / cm 3 .

2. The explosion-proof device for preventing accidental combustion and explosion of explosive materials according to claim 1, characterized in that, An energy-absorbing layer (4) is provided between the two barrier nets (1), and the dense barrier particles (2) are provided on both sides of the energy-absorbing layer (4). The energy-absorbing layer (4) is provided with gaps for gas to pass through.

3. The explosion-proof device for preventing accidental combustion and explosion of explosive materials according to claim 2, characterized in that, The energy-absorbing layer (4) is composed of several non-metallic elastic particles.

4. The explosion-proof device for preventing accidental combustion and explosion of explosive materials according to claim 3, characterized in that, The energy-absorbing layer (4) is made of one of polyurea, resin, ultra-high molecular weight polyethylene or polyurethane.

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