Gas-solid separation device and method for flammable and explosive gas dust

Abstract

The invention provides a gas-solid separation device and method for flammable and explosive gas dust. The method comprises the following steps: introducing mixed gas into gravity settling equipment; gas and fine dust which are not settled after gravity settling enter cloth bag dust removal equipment, and the fine dust is filtered and collected into a dust hopper; the gas subjected to cloth bag dust removal enters efficient filtering equipment to be filtered again; the method comprises the following steps: performing vacuum operation on a bin for collecting dust, closing a vacuum pipeline valve of the bin when vacuum pressure reaches-0.09 MPa, stopping operation of a vacuum pump, opening a vacuum balance pipeline electromagnetic valve to perform pressure balance, and closing a vacuum balance pipeline valve when the pressure reaches system pressure; when the blanking valve of the gravity settling equipment or the blanking valve of the dust hopper of the cloth bag dust removal equipment is opened, materials fall into the lower stock bin, and when the high level meter of the stock bin senses that the materials are full, the corresponding blanking valve is closed, the blanking valve of the stock bin is opened, and the materials are transferred to the next stock bin. According to the invention, the separation efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to an apparatus and method for gas-solid separation of flammable and explosive gas dusts. Background Art

[0002] In the existing field of gas-solid separation of flammable and explosive gas dusts, a common method is to use a simple cyclone separation device for preliminary separation, using centrifugal force to separate large particle dust from the gas, and then using an ordinary filter screen to perform secondary filtration on the dust in the remaining gas. When the cyclone separation device works, the dust-containing gas tangentially enters the cyclone separator through the inlet pipe, forming a rotating airflow. Under the action of centrifugal force, the dust particles are thrown towards the wall of the device and fall along the wall surface into the dust collection hopper, while the gas is discharged from the central pipe of the separator. The ordinary filter screen directly intercepts the remaining dust particles carried when the gas passes through.

[0003] However, with the continuous expansion of industrial production scale, the requirements for gas-solid separation of flammable and explosive gas dusts are increasing day by day. In the cyclone separation stage of the existing gas-solid separation method, due to the limited action of centrifugal force, it is difficult to effectively separate dust particles with smaller particle sizes. Many dust particles with a particle size less than 5 microns will be discharged from the cyclone separator together with the gas; while in the filtration process of the ordinary filter screen, it is easy to be blocked, resulting in poor gas flow and further reducing the overall separation efficiency. This not only makes a large amount of flammable and explosive gases still contain more dust, posing safety hazards in subsequent recycling, but also causes environmental pollution and cannot meet the requirements of environmental protection and safe production. For example, in some powder sintering factories, after adopting the existing separation method, the dust content in the discharged gas exceeds the standard, causing serious pollution to the surrounding environment, and the recycled flammable and explosive gases cannot be directly used in other production links due to excessive dust impurities, resulting in waste of resources. Summary of the Invention

[0004] The present invention provides an apparatus and method for gas-solid separation of flammable and explosive gas dusts, aiming to improve the separation efficiency and the safety of flammable and explosive gases in the recycling process.

[0005] In a first aspect, the present invention provides a method for gas-solid separation of flammable and explosive gas dusts, including:

[0006] Introducing a mixed gas containing flammable and explosive gas and dust into a gravity sedimentation device to make large particle dust freely sediment and fall to the bottom of the sedimentation tank by the action of gravity; a controllable discharge valve is provided at the bottom of the sedimentation tank;

[0007] The gas and fine dust that have not sedimented after gravity sedimentation enter a bag dust removal device, and the bag dust removal device uses a vibrator to vibrate and clean the dust to filter and collect the fine dust into the ash hopper; a controllable discharge valve is provided at the bottom of the ash hopper;

[0008] The gas after bag dust removal enters the high - efficiency filtration equipment for re - filtration to remove the remaining fine dust;

[0009] A vacuum unit is set up to perform vacuum operation on the bin for collecting dust. When the vacuum pressure reaches - 0.09 MPa, the valve of the bin vacuum pipeline is closed, the vacuum pump operation is stopped, the solenoid valve of the vacuum balance pipeline is opened for pressure balance, and when the pressure reaches the system pressure, the valve of the vacuum balance pipeline is closed;

[0010] When the blanking valve of the gravity sedimentation equipment or the blanking valve of the ash hopper of the bag dust removal equipment is opened, the material falls into the lower bin. When the high - level material level meter of the bin senses that the bin is full of material, the corresponding blanking valve is closed, the bin blanking valve is opened, and the material is transferred to the next bin until the material collection and transfer are completed.

[0011] According to the method for separating flammable and explosive gas - dust - gas - solid provided by the present invention, in the gravity sedimentation equipment, the sedimentation time t1 of large - particle dust is determined according to the dust particle diameter d, gravitational acceleration g, gas viscosity η, the height H of the gravity sedimentation equipment, and the sedimentation distance h of the dust particles.

[0012] According to the method for separating flammable and explosive gas - dust - gas - solid provided by the present invention, in the bag dust removal equipment, the filtration area S of the filter bag is determined according to the treated gas flow rate Q and filtration air velocity v; the filter bag is cleaned by vibrating with a vibrator, and the vibration frequency f is determined according to the elastic modulus E of the filter bag material, the mass m of the filter bag, and the effective vibration length L1 of the filter bag.

[0013] According to the method for separating flammable and explosive gas - dust - gas - solid provided by the present invention, when performing vacuum operation on bin 1 by using the vacuum unit, the time t2 required for the vacuum to reach the set pressure of - 0.09 MPa is determined according to the pumping rate V s of the vacuum unit, the volume V of bin 1, and the initial pressure P0 and target pressure P1.

[0014] According to the method for separating flammable and explosive gas - dust - gas - solid provided by the present invention, the filtration efficiency η of the high - efficiency filtration equipment eff is determined according to the porosity ε of the filter medium, fiber diameter d f , gas flow velocity u, dust particle diameter d p , and the thickness L2 of the filter medium, the gas flow velocity u0 and dust particle diameter d under the initial state p0 ; the pneumatic valve is used to control the material transmission between the bin and the equipment, and the opening time t of the pneumatic valve open is determined according to the material flow rate q, the change amount ΔV of the material volume in the bin, and the flow - through cross - sectional area A of the valve.

[0015] According to the method for gas-solid separation of flammable and explosive gases and dust provided by the present invention, explosion relief valves are provided for both the gravity dust removal equipment and the bag dust removal equipment, and when the pressure P in the equipment reaches 0.15 Mpa, automatic pressure relief is carried out, and the pressure relief time t relief According to the discharge area A of the explosion relief valve relief , the adiabatic index γ of the gas in the equipment, the molar mass M of the gas, the gas temperature T, the initial pressure P k and the pressure P after pressure relief relieved , as well as the volume V of the equipment k and the gas constant R are determined.

[0016] According to the method for gas-solid separation of flammable and explosive gases and dust provided by the present invention, the method for gas-solid separation of flammable and explosive gases and dust according to claim 1, characterized in that, single-direction exhaust valves are provided for bin 1 and bin 2, and when the pressure reaches 0.15 Mpa, automatic exhaust is carried out, and the exhaust volume Q exhaust According to the flow coefficient C of the exhaust valve d , the opening area A of the exhaust valve exhaust , the density ρ of the gas, and the pressure difference ΔP are determined; the entire gas-solid separation process is controlled by a PLC program, and the opening and closing of each valve are controlled according to the signals fed back by the level gauges. The control period T of the PLC program cycle According to the stability requirements of the equipment operation, the action response time t of each equipment response , the material transfer time t teansfer and the safety margin time Δt are determined.

[0017] In a second aspect, the present invention further provides a device for gas-solid separation of flammable and explosive gases and dust, which is applied to the method for gas-solid separation of flammable and explosive gases and dust as described in the first aspect; the device for gas-solid separation of flammable and explosive gases and dust includes:

[0018] A gravity sedimentation unit for introducing a mixed gas containing flammable and explosive gases and dust into a gravity sedimentation equipment, so as to make large-particle dust freely sediment and fall to the bottom of the sedimentation tank by using the gravity action; a controllable blanking valve is provided at the bottom of the sedimentation tank;

[0019] A primary filtration unit for allowing the gas and fine dust that have not sedimented after gravity sedimentation to enter the bag dust removal equipment, and the bag dust removal equipment uses a vibrator vibration dust cleaning method to filter and collect the fine dust into the ash hopper; a controllable blanking valve is provided at the bottom of the ash hopper;

[0020] A secondary filtration unit for allowing the gas after bag dust removal to enter a high-efficiency filtration equipment for secondary filtration to remove the remaining fine dust;

[0021] Vacuum unit module, used to set up a vacuum unit to perform vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09 MPa, the valve of the bin vacuum pipeline is closed, the vacuum pump operation is stopped, and the solenoid valve of the vacuum balance pipeline is opened for pressure balance. When the pressure reaches the system pressure, the valve of the vacuum balance pipeline is closed;

[0022] Separation unit module, when the discharge valve of the gravity sedimentation equipment or the discharge valve of the hopper of the bag dust removal equipment is opened, the material falls into the lower bin. When the high-level material level meter of the bin senses that the bin is full of material, the corresponding discharge valve is closed, and the discharge valve of the bin is opened to transfer the material to the next bin until the material collection and transfer are completed.

[0023] In a third aspect, the present invention further provides an electronic device, including: a memory for storing a computer software program; a processor for reading and executing the computer software program, thereby implementing the flammable and explosive gas-dust gas-solid separation method as described in any one of the above.

[0024] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium, in which a computer software program is stored, and when the computer software program is executed by a processor, the flammable and explosive gas-dust gas-solid separation method as described in any one of the above is implemented.

[0025] In a fifth aspect, the present invention further provides a computer program product, including a computer program, and when the computer program is executed by a processor, the flammable and explosive gas-dust gas-solid separation method as described in any one of the above is implemented.

[0026] For the flammable and explosive gas-dust gas-solid separation method provided by the embodiments of the present invention, in the gravity sedimentation stage, by accurately calculating the sedimentation time, large particle dust can be fully sedimented, effectively removing a part of the dust. The bag dust removal equipment adopts a vibration dust cleaning method, which can filter fine dust more efficiently and is not easy to be blocked. The high-efficiency filtration equipment further filters the residual dust, and multiple stages work together to improve the separation efficiency. On the other hand, by setting explosion relief valves and single-direction exhaust valves, automatic pressure relief is carried out when the pressure in the equipment and the bin reaches a dangerous value, avoiding safety accidents such as explosions that may be caused by too high pressure. At the same time, the efficient gas-solid separation reduces the dust content in the gas, reduces the safety risk of flammable and explosive gases in the recycling process, and improves the overall safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a flowchart of the flammable and explosive gas-dust gas-solid separation method provided by the embodiments of the present invention;

[0028] Figure 2 is a process flowchart provided by the embodiments of the present invention;

[0029] Figure 3It is a structural diagram of the flammable and explosive gas-dust gas-solid separation device provided by an embodiment of the present invention;

[0030] Figure 4 It is an embodiment diagram of the electronic device provided by an embodiment of the present invention;

[0031] Figure 5 It is an embodiment diagram of the computer-readable storage medium provided by an embodiment of the present invention. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0033] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0034] In the description of the present invention, the term "for example" is used to mean "used as an example, illustration, or explanation". Any embodiment described as "for example" in the present invention is not necessarily construed as being more preferred or more advantageous than other embodiments. In order for any person skilled in the art to implement and use the present invention, the following description is given. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope that conforms to the principles and features disclosed in the present invention.

[0035] Optionally, referring to Figure 1 and Figure 2 As shown, the execution subject of the flammable and explosive gas-dust gas-solid separation method in the embodiments of the present invention is the flammable and explosive gas-dust gas-solid separation device. Therefore, the flammable and explosive gas-dust gas-solid separation method includes:

[0036] Step 10, introducing the mixed gas containing flammable and explosive gas and dust into the gravity sedimentation device to make the large-particle dust freely settle to the bottom of the sedimentation tank by the action of gravity; a controllable blanking valve is provided at the bottom of the sedimentation tank.

[0037] Optionally, in a certain powder sintering factory, a mixed gas containing hydrogen, methane, natural gas, and graphite powder is generated during the production process. First, start the entire gas-solid separation system. The gas stream containing the mixed gas enters the gravity sedimentation equipment at a certain flow rate. According to the dust particle diameter d, gravitational acceleration g, and gas viscosity η, combined with the calculation formula Calculate the sedimentation time t1 of large particle dust, where H is the height of the gravity sedimentation equipment and h is the sedimentation distance of the dust particles. For example, the height of the gravity sedimentation equipment H = 5m, the sedimentation distance of the dust particles h = 4m, the gas viscosity η = 1.8*10 -5 Pa·s, the graphite powder particle diameter d = 50*10 -6 m, and the gravitational acceleration g = 9.8m / s 2 . Substituting into the formula, we get:

[0038]

[0039] Therefore, after about 1.32s, the large particle graphite powder freely settles to the bottom of the sedimentation box.

[0040] Step 20, the gas and fine dust that have not settled after gravity sedimentation enter the bag dust removal equipment. The bag dust removal equipment uses a vibrator for dust cleaning to filter and collect the fine dust into the ash hopper.

[0041] Furthermore, the gas that has not settled after gravity sedimentation enters the bag dust removal equipment. Determine the filtration area S of the bag according to the treated gas flow rate Q and the filtration air velocity v. For example, the treated gas flow rate Q = 1000m 3 / h, and the filtration air velocity v = 0.8m / min. Then the bag filtration area S = 1000 / (0.8*60) ≈ 20.83m 2 . Further, according to the elastic modulus E of the bag material, the mass m of the bag, and the effective vibration length L1 of the bag, combined with the formula Calculate the vibration cleaning of the bag using a vibrator. For example, the elastic modulus E of the bag material = 2*10 9 N / m 2 , the bag mass m = 10kg, the effective vibration length L1 = 2m, and the vibration frequency During the bag filtration process, the fine dust is intercepted on the surface of the bag, and the gas passes through the bag and enters the subsequent equipment.

[0042] Step 30, the gas after bag dust removal enters the high-efficiency filtration equipment for re-filtration to remove the remaining fine dust.

[0043] Further, the gas after bag dust removal enters the high-efficiency filtration equipment, and the high-efficiency filtration equipment conducts secondary filtration to remove the remaining fine dust. According to the porosity ε of the filter medium, the fiber diameter d f , the gas flow velocity u, and the dust particle diameter d p Combined with the formula Calculate the filtration efficiency η of the high-efficiency filtration equipment eff , where L2 is the thickness of the filter medium, and u0 and d p0 Are the gas flow velocity and dust particle diameter in the initial state.

[0044] For example, the porosity of the filter medium ε = 0.3, and the fiber diameter d f = 10*10 -6 m, the gas flow velocity u = 1m / s, and the dust particle diameter d p = 1*10 -6 m, the thickness of the filter medium L2 = 0.1m, the initial gas flow velocity u0 = 1m / s, and the initial dust particle diameter d p0 = 1*10 -6 m. Therefore:

[0045]

[0046] Therefore, after passing through the high-efficiency filtration equipment, the remaining fine dust in the gas is further removed.

[0047] Step 40, set up a vacuum unit to perform a vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09MPa, close the valve of the bin vacuum pipeline, stop the operation of the vacuum pump, open the solenoid valve of the vacuum balance pipeline for pressure balance, and close the valve of the vacuum balance pipeline when the pressure reaches the system pressure.

[0048] Further, during the whole process, use the vacuum unit to perform a vacuum operation on bin 1. According to the pumping rate V of the vacuum unit s , the volume V of bin 1, the initial pressure P0, and the target pressure P1, combined with the calculation formula t2 = (V / V s )ln(P0 / P1) to calculate the time t2 required for the vacuum to reach the set pressure of -0.09MPa. For example, the pumping rate of the vacuum unit V s = 50m 3 / h, the volume of bin 1 V = 10m 3 , the initial pressure P0 = 0.1MPa, and the target pressure P1 = -0.09MPa. Therefore:

[0049] t2 = (10 / 50)ln(0.1 / -0.09) ≈ 0.21h.

[0050] When the vacuum pressure reaches -0.09 MPa, the vacuum pipeline valve of the bin 1 closes, the vacuum pump shuts down, and the solenoid valve of the vacuum balance pipeline opens for pressure balance. When the pressure reaches the system pressure, the relevant valves close, and the material discharge valves of the gravity sedimentation equipment and the dust hopper of the bag filter open, and the material falls into the bin 1.

[0051] When the high-level material level meter of the bin 1 senses that the bin is full, the material discharge valve of the gravity sedimentation equipment closes, and the material discharge valve of the bin 1 opens, and the material falls into the bin 2.

[0052] The material transfer between the bin and the equipment is controlled by pneumatic valves. According to the material flow rate q, the change in the volume of the material in the bin ΔV, and the flow area A of the valve, the opening time t of the pneumatic valve is calculated according to the formula open t = ΔV / (qA) open . For example, the material flow rate q = 100 kg / h, the change in the volume of the material in the bin ΔV = 1 m 3 , the flow area of the valve A = 0.01 m 2 , so, t open = 1 / (100 * 0.01) = 1 h. After the bin 2 is filled with the material, it is transported away for dumping.

[0053] Step 50, when the material discharge valve of the gravity sedimentation equipment or the dust hopper of the bag dust removal equipment opens, the material falls into the lower bin. When the high-level material level meter of the bin senses that the bin is full, the corresponding material discharge valve closes, and the material discharge valve of the bin opens to transfer the material to the next bin until the material collection and transfer are completed.

[0054] Furthermore, explosion relief valves are installed on both the gravity dust removal equipment and the bag dust removal equipment, and check valves are installed on the bin 1 and the bin 2. When the pressure in the equipment or the bin reaches 0.15 Mpa, according to the relief area A relief , the adiabatic index γ of the gas in the equipment, the molar mass M of the gas, the gas temperature T, the initial pressure P k and the pressure P after pressure relief relieved , the pressure relief time t is calculated according to the formula , where V relief is the volume of the equipment, R is the gas constant, and according to the flow coefficient C k of the exhaust valve, the opening area A d of the exhaust valve, the density ρ of the gas, and the pressure difference ΔP, the exhaust volume Q is calculated according to the formula exhaust to ensure safe operation. Q = C * A * √(2ΔP / ρ) exhaust

[0055] The whole process is controlled by the PLC program. According to the equipment action response time t response and the material transfer time t teansfer, calculate the control period T according to the formula T cycle = max(t response , t teansfer ) + Δt, where Δt is the safety margin time to ensure the coordinated operation of each device. cycle Finally, perform component detection on the separated gas. If the concentrations of flammable and explosive gases such as hydrogen, methane, and natural gas are lower than the set safety values and the dust content is lower than the set emission standards, it is determined that the separation is qualified.

[0056] Finally, perform component detection on the separated gas. If the concentrations of flammable and explosive gases such as hydrogen, methane, and natural gas are lower than the set safety values and the dust content is lower than the set emission standards, it is determined that the separation is qualified.

[0057] In the gravity sedimentation stage of the present invention, by accurately calculating the sedimentation time, large-particle dust can be fully sedimented, effectively removing a part of the dust. The bag dust removal equipment uses the vibration cleaning method to filter fine dust more efficiently and is not easily blocked. The high-efficiency filtration equipment further filters the residual dust, and the multi-stage collaborative work improves the separation efficiency. On the other hand, by setting explosion relief valves and single-direction exhaust valves, the pressure is automatically relieved when the pressure in the equipment and the silo reaches a dangerous value, avoiding safety accidents such as explosions that may be caused by excessive pressure. At the same time, the efficient gas-solid separation reduces the dust content in the gas, reduces the safety risk of flammable and explosive gases in the recycling process, and improves the overall safety.

[0058] Furthermore, the flammable and explosive gas and dust gas-solid separation system provided by the present invention will be described below. The flammable and explosive gas and dust gas-solid separation system described below can be mutually corresponding and referred to the flammable and explosive gas and dust gas-solid separation method described above. Optionally, refer to Figure 3 , Figure 3 is the structural diagram of the flammable and explosive gas and dust gas-solid separation device provided by the present invention. The flammable and explosive gas and dust gas-solid separation device includes:

[0059] The gravity sedimentation unit 310 is used to introduce the mixed gas containing flammable and explosive gases and dust into the gravity sedimentation equipment to make large-particle dust freely sediment and fall to the bottom of the sedimentation tank by gravity; a controllable blanking valve is arranged at the bottom of the sedimentation tank;

[0060] The primary filtration unit 320 is used to allow the gas and fine dust that have not sedimented after gravity sedimentation to enter the bag dust removal equipment. The bag dust removal equipment uses the vibration cleaning method of a vibrator to filter and collect the fine dust into the ash hopper; a controllable blanking valve is arranged at the bottom of the ash hopper;

[0061] The secondary filtration unit 330 is used to allow the gas after bag dust removal to enter the high-efficiency filtration equipment for secondary filtration to remove the remaining fine dust;

[0062] The vacuum unit 340 is used to set up the vacuum unit for vacuum operation of the bin that collects dust. When the vacuum pressure reaches -0.09 MPa, the valve of the bin vacuum pipeline is closed, the operation of the vacuum pump is stopped, and the solenoid valve of the vacuum balance pipeline is opened for pressure balance. When the pressure reaches the system pressure, the valve of the vacuum balance pipeline is closed.

[0063] The separation unit 350 is used to transfer the material to the lower bin when the discharge valve of the gravity sedimentation equipment or the discharge valve of the hopper of the bag dust removal equipment is opened. When the high-level material level meter of the bin senses that the bin is full of material, the corresponding discharge valve is closed, and the discharge valve of the bin is opened to transfer the material to the next bin until the collection and transfer of the material are completed.

[0064] In the gravity sedimentation stage of the embodiment of the present invention, by accurately calculating the sedimentation time, large-particle dust can be fully sedimented, effectively removing a part of the dust. The bag dust removal equipment uses the vibration dust cleaning method to filter fine dust more efficiently and is not easily blocked. The high-efficiency filtration equipment further filters the residual dust, and the multi-stage cooperation improves the separation efficiency. On the other hand, by setting the explosion relief valve and the one-way exhaust valve, the pressure is automatically relieved when the pressure in the equipment and the bin reaches a dangerous value, avoiding safety accidents such as explosions that may be caused by too high pressure. At the same time, the efficient gas-solid separation reduces the dust content in the gas, reduces the safety risk of flammable and explosive gases during the recycling process, and improves the overall safety.

[0065] Please refer to Figure 4 , Figure 4 which is the embodiment diagram of the electronic device provided by the embodiment of the present invention. As Figure 4 shown, the embodiment of the present invention provides an electronic device 400, including a memory 410, a processor 420, and a computer program 411 stored on the memory 410 and operable on the processor 420. When the processor 420 executes the computer program 411, the following steps are implemented:

[0066] Introduce the mixed gas containing flammable and explosive gases and dust into the gravity sedimentation equipment to make the large-particle dust freely sediment to the bottom of the sedimentation tank by the action of gravity; a controllable discharge valve is provided at the bottom of the sedimentation tank;

[0067] The gas and fine dust that have not sedimented after gravity sedimentation enter the bag dust removal equipment, and the bag dust removal equipment uses the vibration of the vibrator to filter and collect the fine dust into the hopper; a controllable discharge valve is provided at the bottom of the hopper;

[0068] The gas after bag dust removal enters the high-efficiency filtration equipment for re-filtration to remove the remaining fine dust;

[0069] A vacuum unit is set up to perform vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09 MPa, the valve of the bin vacuum pipeline is closed, the vacuum pump operation is stopped, the solenoid valve of the vacuum balance pipeline is opened for pressure balance, and when the pressure reaches the system pressure, the valve of the vacuum balance pipeline is closed;

[0070] When the discharge valve of the gravity sedimentation equipment or the discharge valve of the dust hopper of the bag dust removal equipment is opened, the material falls into the lower bin. When the high-level material level meter of the bin senses that the bin is full, the corresponding discharge valve is closed, and the discharge valve of the bin is opened to transfer the material to the next bin until the material collection and transfer are completed.

[0071] Please refer to Figure 5 , Figure 5 which is the embodiment diagram of the computer-readable storage medium provided by the embodiment of the present invention. As Figure 5 shown, this embodiment provides a computer-readable storage medium 500, on which a computer program 411 is stored. When the computer program 411 is executed by a processor, the following steps are implemented:

[0072] Introduce the mixed gas containing flammable and explosive gases and dust into the gravity sedimentation equipment to make the large-particle dust freely settle to the bottom of the sedimentation tank by the action of gravity; a controllable discharge valve is arranged at the bottom of the sedimentation tank;

[0073] The gas and fine dust that have not settled after gravity sedimentation enter the bag dust removal equipment, and the bag dust removal equipment uses the vibration cleaning method of the vibrator to filter and collect the fine dust into the dust hopper; a controllable discharge valve is arranged at the bottom of the dust hopper;

[0074] The gas after bag dust removal enters the high-efficiency filtration equipment for secondary filtration to remove the remaining fine dust;

[0075] A vacuum unit is set up to perform vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09 MPa, the valve of the bin vacuum pipeline is closed, the vacuum pump operation is stopped, the solenoid valve of the vacuum balance pipeline is opened for pressure balance, and when the pressure reaches the system pressure, the valve of the vacuum balance pipeline is closed;

[0076] When the discharge valve of the gravity sedimentation equipment or the discharge valve of the dust hopper of the bag dust removal equipment is opened, the material falls into the lower bin. When the high-level material level meter of the bin senses that the bin is full, the corresponding discharge valve is closed, and the discharge valve of the bin is opened to transfer the material to the next bin until the material collection and transfer are completed.

[0077] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the flammable and explosive gas and dust gas-solid separation method provided by the above-mentioned various methods. The method includes:

[0078] Introduce the mixed gas containing flammable and explosive gas and dust into a gravity sedimentation device to make large-particle dust freely settle to the bottom of the sedimentation tank by the action of gravity; a controllable discharge valve is arranged at the bottom of the sedimentation tank;

[0079] The gas and fine dust that have not settled after gravity sedimentation enter a bag dust removal device. The bag dust removal device uses a vibrator to vibrate and clean the dust to filter and collect the fine dust into a hopper; a controllable discharge valve is arranged at the bottom of the hopper;

[0080] The gas after bag dust removal enters a high-efficiency filtration device for re-filtration to remove the remaining fine dust;

[0081] Set up a vacuum unit to perform a vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09 MPa, close the valve of the bin vacuum pipeline, stop the operation of the vacuum pump, open the solenoid valve of the vacuum balance pipeline for pressure balance, and when the pressure reaches the system pressure, close the valve of the vacuum balance pipeline;

[0082] When the discharge valve of the gravity sedimentation device or the discharge valve of the hopper of the bag dust removal device is opened, the material falls into the lower bin. When the high-level material level meter of the bin senses that the material is full, close the corresponding discharge valve, open the discharge valve of the bin, and transfer the material to the next bin until the collection and transfer of the material are completed.

[0083] The system embodiments described above are merely illustrative. The units described as separation components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0084] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for gas-solid separation of flammable and explosive gas and dust, characterized in that, Comprising: Introduce the mixed gas containing flammable and explosive gases and dust into a gravity sedimentation device to allow large particle dust to freely settle by gravity and fall to the bottom of the sedimentation tank; A controllable discharge valve is provided at the bottom of the sedimentation tank; The gases and fine dust that have not settled after gravity sedimentation enter a bag dust removal device, and the bag dust removal device uses a vibrator to vibrate and clean the dust to filter and collect the fine dust into the ash hopper; A controllable discharge valve is provided at the bottom of the ash hopper; The gases after bag dust removal enter a high-efficiency filtration device for re-filtration to remove residual fine dust; A vacuum unit is provided to perform a vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09 MPa, close the valve of the bin vacuum pipeline, stop the operation of the vacuum pump, open the solenoid valve of the vacuum balance pipeline for pressure balance, and when the pressure reaches the system pressure, close the valve of the vacuum balance pipeline; When the discharge valve of the gravity sedimentation device or the discharge valve of the ash hopper of the bag dust removal device is opened, the material falls into the lower bin. When the high-level material level meter of the bin senses that the bin is full, close the corresponding discharge valve, open the discharge valve of the bin, and transfer the material to the next bin until the collection and transfer of the material are completed.

2. The method for separating flammable and explosive gas and dust gas-solid according to claim 1, wherein In the said gravity sedimentation device, the sedimentation time t1 of the large particle dust is determined according to the dust particle diameter d, gravitational acceleration g, gas viscosity η, and the height H of the gravity sedimentation device, and the sedimentation distance h of the dust particles.

3. The method for separating flammable and explosive gas and dust gas-solid according to claim 1, characterized in that, In the said bag dust removal device, the filtration area S of the bag is determined according to the treated gas flow rate Q and filtration air velocity v; the bag uses a vibrator to vibrate and clean the dust, and the vibration frequency f is determined according to the elastic modulus E of the bag material, the mass m of the bag, and the effective vibration length L1 of the bag.

4. The method for separating flammable and explosive gas and dust gas-solid according to claim 1, characterized in that, When performing vacuum operation on the silo 1 using a vacuum unit, the time t2 required for the vacuum to reach the set pressure of -0.09 MPa is determined according to the pumping rate V of the vacuum unit s , the volume V of the silo 1, and the initial pressure P0 and the target pressure P1 5. The method for separating flammable and explosive gas and dust gas-solid according to claim 1, characterized in that, The filtration efficiency η of the high-efficiency filtration device eff is determined according to the porosity ε of the filter medium, the fiber diameter d f , the gas flow velocity u, the dust particle diameter d p , as well as the thickness L2 of the filter medium, the gas flow velocity u0 in the initial state, and the dust particle diameter d p0 ; a pneumatic valve is used to control the material transfer between the silo and the device, and the opening time t of the pneumatic valve open is determined according to the material flow rate q, the change in the volume of the material in the silo ΔV, and the flow cross-sectional area A of the valve.

6. The method for gas-solid separation of flammable and explosive gas and dust according to claim 1, characterized in that, The gravity dust removal equipment and the bag dust removal equipment are both provided with explosion relief valves, which automatically relieve pressure when the pressure P in the equipment reaches 0.15 Mpa, and the pressure relief time t relief According to the discharge area A of the explosion relief valve relief , the adiabatic index γ of the gas in the equipment, the molar mass M of the gas, the gas temperature T, the initial pressure P k and the pressure P after pressure relief relieved , as well as the volume V of the equipment k and the gas constant R are determined.

7. The method for separating flammable and explosive gas and dust gas-solid according to claim 1, characterized in that, The method for gas-solid separation of flammable and explosive gas and dust according to claim 1 is characterized in that the silos 1 and 2 are provided with single-direction exhaust valves, which automatically exhaust when the pressure reaches 0.15 Mpa, and the exhaust volume Q exhaust is determined according to the flow coefficient C of the exhaust valve d , the opening area A of the exhaust valve exhaust , the density ρ of the gas and the pressure difference ΔP; the entire gas-solid separation process is controlled by a PLC program, and the opening and closing of each valve are controlled according to the signals fed back by the level gauges. The control period T of the PLC program cycle is determined according to the stability requirements of the equipment operation, the action response time t of each equipment response , the material transfer time t teansfer and the safety margin time Δt.

8. An inflammable and explosive gas-dust gas-solid separation device, characterized in that, Applied to the flammable and explosive gas dust gas-solid separation method as described in any one of claims 1 to 7; the flammable and explosive gas dust gas-solid separation device comprises: A gravity sedimentation unit for introducing the mixed gas containing flammable and explosive gases and dust into a gravity sedimentation device to allow large particle dust to freely settle by gravity and fall to the bottom of the sedimentation tank; a controllable discharge valve is provided at the bottom of the sedimentation tank; A primary filtration unit for allowing the gases and fine dust that have not settled after gravity sedimentation to enter a bag dust removal device, and the bag dust removal device uses a vibrator to vibrate and clean the dust to filter and collect the fine dust into the ash hopper; a controllable discharge valve is provided at the bottom of the ash hopper; A re-filtration unit for allowing the gases after bag dust removal to enter a high-efficiency filtration device for re-filtration to remove residual fine dust; A vacuum unit for providing a vacuum unit to perform a vacuum operation on the bin for collecting dust. When the vacuum pressure reaches -0.09 MPa, close the valve of the bin vacuum pipeline, stop the operation of the vacuum pump, open the solenoid valve of the vacuum balance pipeline for pressure balance, and when the pressure reaches the system pressure, close the valve of the vacuum balance pipeline; A separation unit for when the discharge valve of the gravity sedimentation device or the discharge valve of the ash hopper of the bag dust removal device is opened, the material falls into the lower bin. When the high-level material level meter of the bin senses that the bin is full, close the corresponding discharge valve, open the discharge valve of the bin, and transfer the material to the next bin until the collection and transfer of the material are completed.

Images