Flue dust environment simulation dust generation mixing bin

Abstract

The invention discloses a flue dust environment simulation dust generation mixing bin which comprises a heat preservation air supply bin and a heat preservation mixing bin, an air supply opening is formed in the heat preservation air supply bin and connected with an electric heater, a dust generation device is arranged in the heat preservation air supply bin, and the heat preservation mixing bin comprises a flow stabilization cavity section and a mixing cavity section. A honeycomb steady flow plate is arranged between the steady flow chamber section and the heat preservation air supply bin, a plurality of steady flow net plates are arranged in the steady flow chamber section, a dust diffusion barrel is arranged in the heat preservation mixing bin and penetrates through the steady flow chamber section, and the upstream end of the dust diffusion barrel is a small-diameter end and extends into the heat preservation air supply bin to be communicated with a dust generating device. The downstream end of the dust diffusion cylinder is a large-diameter end and is communicated with the mixing chamber section, a humidifying device is further connected into the mixing chamber section, a heat preservation dust outlet pipe is arranged at the downstream of the mixing chamber section, stable high-temperature and high-humidity dusty gas is generated by the dust generation mixing bin, and the dust environment simulation requirements of high air speed, high flow and temperature and humidity control are met.

Description

Technical Field

[0001] The invention relates to the technical field of dust environment simulation, and in particular to a flue dust environment simulation dust generating mixing chamber. Background Art

[0002] In the field of dust environment simulation, conventional dust environments are generally simulated, and the simulation of dust environments mainly includes horizontal wind tunnel environment simulation and vertical sedimentation environment simulation. For example, the public document with the publication number CN221860213U discloses a vertical high-concentration dust environment simulation device, which belongs to the simulation of vertical sedimentation environment; and the invention disclosure document with the publication number CN114235322A discloses a horizontal wind tunnel dust environment simulation, but these two environmental simulations cannot simulate the chimney flue environment, because the chimney flue environment has the following major characteristics: 1. The temperature is relatively high; 2. The humidity is relatively high; 3. The wind speed is relatively fast, and the above two environmental simulation devices are difficult to simulate. Simulating the flue dust environment can facilitate the calibration of the flue dust concentration detection instrument, so the simulation of the flue dust environment is particularly important. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a flue dust environment simulation dust generating mixing chamber, which produces stable high-temperature and high-humidity dust-containing gas to meet the requirements of dust environment simulation with high wind speed, high flow, temperature and humidity control.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a flue dust environment simulation dust generation mixing bin, comprising an insulated air supply bin and an insulated mixing bin which are interconnected, the insulated air supply bin is provided with an air supply port, the air supply port is connected with an electric heater, a dust generation device is provided in the insulated air supply bin, the insulated mixing bin comprises an upstream stabilizing chamber section and a downstream mixing chamber section, a honeycomb stabilizing plate is provided between the stabilizing chamber section and the insulated air supply bin, and a A plurality of flow stabilizing mesh plates are arranged perpendicular to the gas flow direction, a conical dust diffusion tube is arranged in the thermal insulation mixing bin, the dust diffusion tube passes through the flow stabilizing chamber section, the upstream end of the dust diffusion tube is a small diameter end and extends into the thermal insulation air replenishment bin and is connected with the dust generating port of the dust generating device, the downstream end of the dust diffusion tube is a large diameter end and is connected with the mixing chamber section downstream of the thermal insulation mixing bin, a humidifying device is also connected in the mixing chamber section, and an thermal insulation dust outlet pipe is arranged downstream of the mixing chamber section.

[0005] As a preferred solution, the thermal insulation mixing bin is a rectangular mixing bin, each flow stabilizing mesh plate includes two mesh plate monomers spliced ​​together, each mesh plate monomer includes a mesh plate frame and a flow stabilizing hole mesh filled in the mesh plate frame, the mesh plate frame is fixed on the cavity wall of the flow stabilizing chamber section, and a semicircular groove portion that is sleeved on the outside of the dust diffusion cylinder is provided on the vertical rod in the middle of the flow stabilizing chamber section on the mesh plate frame, and the two semicircular groove portions on the spliced ​​hole mesh monomers cooperate with each other to form a circular groove portion, the dust diffusion cylinder passes through the circular groove portion and is fixed with a fixing ring, and the fixing ring is detachably fixed to the corresponding circular groove portion.

[0006] As a preferred solution, the humidifying device includes a steam humidifying device and a normal temperature water mist humidifying device, and the outlets of the steam humidifying device and the normal temperature water mist humidifying device are both connected to the mixing chamber section.

[0007] As a preferred solution, the steam humidification device includes a steam box fixed to the outside of the mixing chamber section, and a heating water pump, an electric heating device and an air storage tank are arranged in the steam box. The inlet of the heating water pump is connected to the water supply system, the outlet of the heating water pump is connected to the inlet of the electric heating device, the outlet of the electric heating device is connected to the inlet of the air storage tank, and the air outlet of the air storage tank is connected to a steam inlet pipe, and the outlet of the steam inlet pipe extends into the mixing chamber section.

[0008] As a preferred solution, a liquid reflux port is provided at the bottom of the gas storage tank, and the liquid reflux port refluxes to the inlet of the heating water pump through a reflux pipeline.

[0009] As a preferred solution, the normal temperature water mist humidification device includes a mist inlet flange arranged on the side wall of the insulated mixing bin, a plurality of atomizing pipe joints are arranged on the mist inlet flange, a plurality of atomizing nozzles are fixed to the downstream end of the dust diffusion cylinder, a pipeline is connected between the atomizing pipe joint and the atomizing nozzle, and the mist inlet flange is connected to the normal temperature water supply system.

[0010] As a preferred solution, the entire downstream side of the mixing chamber section is a dust outlet, the insulated dust outlet pipe is welded into a necked shape by several sections of reducing diameter sections with rectangular interfaces, and the upstream end of the insulated dust outlet pipe is fixed on the frame of the mixing chamber section.

[0011] As a preferred solution, the four corners of the upstream end and the downstream end of the heat-insulating dust outlet pipe are respectively connected with connecting rods, and the outside of the heat-insulating dust outlet pipe is filled with heat-insulating material between the connecting rods.

[0012] After adopting the above technical scheme, the effect of the present invention is as follows: due to the flue dust environment simulating the dust generating mixing bin, it includes a heat-insulating air-supplementing bin and a heat-insulating mixing bin which are interconnected, the heat-insulating air-supplementing bin is provided with an air-supplementing port, the air-supplementing port is connected with an electric heater, a dust generating device is provided in the heat-insulating air-supplementing bin, the heat-insulating mixing bin includes an upstream stabilizing chamber section and a downstream mixing chamber section, a honeycomb stabilizing plate is provided between the stabilizing chamber section and the heat-insulating air-supplementing bin, and a A plurality of flow stabilizing mesh plates are perpendicular to the gas flow direction. A conical dust diffusion tube is arranged in the heat-insulating mixing bin. The dust diffusion tube runs through the flow stabilizing chamber section. The upstream end of the dust diffusion tube is a small-diameter end and extends into the heat-insulating air replenishing bin and is connected with the dust generating port of the dust generating device. The downstream end of the dust diffusion tube is a large-diameter end and is connected with the mixing chamber section downstream of the heat-insulating mixing bin. A humidifying device is also connected in the mixing chamber section. A heat-insulating dust outlet pipe is arranged downstream of the mixing chamber section. Therefore, the replenished gas can be heated by the electric heater, thereby increasing the temperature of the gas entering the insulated gas replenishment bin, and then the dust generated by the dust generating device is sent into the dust diffusion cylinder, and enters the mixing chamber section after diffusion by the dust diffusion cylinder. During normal use, the insulated dust outlet pipe will be connected to the simulation chamber and powered by the exhaust fan, so the gas in the insulated mixing bin is connected to the gas in the dust diffusion cylinder and will be extracted from the insulated dust outlet pipe. At this time, the pressure in the mixing chamber section is reduced, so that the gas in the insulated gas replenishment bin will pass through the honeycomb flow stabilizer plate and the flow stabilizer mesh plate to form a large number of small airflows and enter the mixing chamber section. In this way, the replenished airflow will be evenly mixed with the dust emitted by the dust diffusion cylinder. In this way, even if the exhaust volume is large, the gas in the insulated gas replenishment bin can be evenly replenished, and there will be no local excessive airflow. The humidification device provides humidity for the mixing chamber section. Therefore, the dust generating mixing bin can meet the large-flow, high-temperature and high-humidity environmental simulation of the chimney dust environment.

[0013] Since the thermal insulation mixing bin is a rectangular mixing bin, each flow stabilizing mesh plate includes two mesh plate monomers spliced ​​together, each mesh plate monomer includes a mesh plate frame and a flow stabilizing hole mesh filled in the mesh plate frame, the mesh plate frame is fixed on the cavity wall of the flow stabilizing chamber section, and a semicircular groove portion that is sleeved on the outside of the dust diffusion cylinder is provided on the vertical rod in the middle of the flow stabilizing chamber section on the mesh plate frame, and the two semicircular groove portions on the spliced ​​hole mesh monomers cooperate with each other to form a circular groove portion, the dust diffusion cylinder passes through the circular groove portion and is fixed with a fixing ring, and the fixing ring is detachably fixed to the corresponding circular groove portion. Therefore, the thermal insulation mixing bin is simple to manufacture, and the installation of the flow stabilizing mesh plate is also very convenient, and the dust diffusion cylinder can be well fixed.

[0014] Furthermore, since the humidifying device comprises a steam humidifying device and a normal temperature water mist humidifying device, the outlets of the steam humidifying device and the normal temperature water mist humidifying device are both connected to the mixing chamber section, thus a high temperature and high humidity environment and a normal temperature and high humidity flue environment can be simulated according to actual environmental simulation requirements.

[0015] Furthermore, since the normal temperature water mist humidification device includes a mist inlet flange arranged on the side wall of the heat-insulating mixing bin, a plurality of atomizing pipe joints are arranged on the mist inlet flange, a plurality of atomizing nozzles are fixed to the downstream end of the dust diffusion cylinder, the atomizing pipe joints and the atomizing nozzles are connected by pipelines, and the mist inlet flange is connected to the normal temperature water supply system, the humidity can be controlled by controlling the opening and closing of different numbers of atomizing nozzles.

[0016] Since the entire downstream side of the mixing chamber section is the dust outlet, the insulated dust outlet pipe is welded into a necked shape by several sections of reducing diameter sections with rectangular interfaces, and the upstream end of the insulated dust outlet pipe is fixed on the frame of the mixing chamber section. In this way, when the exhaust fan at the downstream end exhausts air, all the dust-containing air in the entire mixing chamber section can be drawn in, so that the uniformity of the particulate matter is better and the difficulty of making the insulated dust outlet pipe is also lower.

[0017] Furthermore, since the insulated dust outlet pipe is connected with connecting rods at the four corners of the upstream end and the four corners of the downstream end respectively, the outside of the insulated dust outlet pipe is filled with insulating material between the connecting rods, so it is more convenient to fill the insulating material outside the insulated dust outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 is a structural schematic diagram of another angle of an embodiment of the present invention;

[0021] Figure 3 is a front view of an embodiment of the present invention;

[0022] Figure 4 yes Figure 3 Section view along AA;

[0023] Figure 5 It is a structural schematic diagram of an embodiment of the present invention in which some structures are omitted;

[0024] Figure 6 is a schematic structural diagram from another angle in which part of the structure of an embodiment of the present invention is omitted;

[0025] Figure 7is a schematic diagram of the internal structure of a steam humidifying device according to an embodiment of the present invention;

[0026] Figure 8 yes Figure 5 A magnified view of the structure at center A;

[0027] In the attached figure: 1. Insulated air supply bin; 2. Insulated mixing bin; 21. Flow stabilizing chamber section; 22. Mixing chamber section; 23. Honeycomb flow stabilizing plate; 24. Flow stabilizing mesh plate; 25. Fixed ring; 3. Air supply port; 4. Electric heater; 5. Dust generating device; 6. Dust diffusion cylinder; 7. Insulated dust outlet pipe; 8. Steam box; 9. Heating water pump; 10. Electric heating device; 11. Gas storage tank; 12. Steam inlet pipe; 13. Liquid reflux port; 14. Mist inlet flange; 15. Atomizing pipe joint; 16. Atomizing nozzle; 17. Connecting rod. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below through specific examples.

[0029] like Figure 1-8 As shown, a flue dust environment simulation dust generation and mixing bin comprises a heat preservation gas replenishment bin 1 and a heat preservation mixing bin 2 which are interconnected, the heat preservation gas replenishment bin 1 is provided with a gas replenishment port 3, the gas replenishment port 3 is connected with an electric heater 4, a dust generation device 5 is provided in the heat preservation gas replenishment bin 1, the heat preservation mixing bin 2 comprises an upstream stabilizing chamber section 21 and a downstream mixing chamber section 22, a honeycomb stabilizing plate 23 is provided between the stabilizing chamber section 21 and the heat preservation gas replenishment bin 1, and a plurality of gas flow direction-related ... A vertical flow stabilizing mesh plate 24, a conical dust diffusion tube 6 is arranged in the thermal insulation mixing bin 2, the dust diffusion tube 6 passes through the flow stabilizing chamber section 21, the upstream end of the dust diffusion tube 6 is a small diameter end, and extends into the thermal insulation air replenishing bin 1 and is connected with the dust generating port of the dust generating device 5, the downstream end of the dust diffusion tube 6 is a large diameter end, and is connected with the mixing chamber section 22 downstream of the thermal insulation mixing bin 2, a humidifying device is also connected to the mixing chamber section 22, and an insulation dust outlet pipe 7 is arranged downstream of the mixing chamber section 22.

[0030] In this embodiment, the entire downstream side of the mixing chamber section 22 is a dust outlet, and the heat-insulating dust outlet pipe 7 is welded by several sections of reducing diameter sections with rectangular interfaces to form a constricted shape, and the upstream end of the heat-insulating dust outlet pipe 7 is fixed on the frame of the mixing chamber section 22. The heat-insulating dust outlet pipe 7 is connected to connecting rods 17 at the four corners of the upstream end and the four corners of the downstream end, respectively, and the outside of the heat-insulating dust outlet pipe 7 is filled with heat-insulating material between the connecting rods 17. The heat-insulating mixing bin 2 is a rectangular mixing bin, and each flow-stabilizing mesh plate 24 includes two mesh plate monomers spliced ​​together, and each mesh plate monomer includes a mesh plate frame and a flow-stabilizing hole mesh filled in the mesh plate frame. The mesh plate frame is fixed on the cavity wall of the flow-stabilizing chamber section 21, and a semicircular groove portion that is sleeved on the outside of the dust diffusion cylinder 6 is provided on the vertical rod in the middle of the flow-stabilizing chamber section 21 on the mesh plate frame. The two semicircular groove portions on the spliced ​​mesh plate monomers cooperate with each other to form a circular groove portion, and the dust diffusion cylinder 6 passes through the circular groove portion and is fixed with a fixing ring 25, and the fixing ring 25 is detachably fixed to the corresponding circular groove portion.

[0031] In this embodiment, the humidifying device includes a steam humidifying device and a normal temperature water mist humidifying device, and the outlets of the steam humidifying device and the normal temperature water mist humidifying device are both connected to the mixing chamber section 22. The steam humidifying device includes a steam box 8 fixed to the outside of the mixing chamber section 22, and a heating water pump 9, an electric heating device 10 and a gas storage tank 11 are arranged in the steam box 8, the inlet of the heating water pump 9 is connected to the water supply system, the outlet of the heating water pump 9 is connected to the inlet of the electric heating device 10, and the outlet of the electric heating device 10 is connected to the inlet of the gas storage tank 11, and the gas outlet of the gas storage tank 11 is connected to a steam inlet pipe 12, and the outlet of the steam inlet pipe 12 extends into the mixing chamber section 22. A liquid reflux port 13 is arranged at the bottom of the gas storage tank 11, and the liquid reflux port 13 refluxes to the inlet of the heating water pump 9 through a reflux pipeline. The normal temperature water mist humidification device includes a mist inlet flange 14 arranged on the side wall of the heat-insulating mixing bin 2, and a plurality of atomizing pipe joints 15 are arranged on the mist inlet flange 14. A plurality of atomizing nozzles 16 are fixed to the downstream end of the dust diffusion cylinder 6. The atomizing pipe joints 15 and the atomizing nozzles 16 are connected by pipelines, and the mist inlet flange 14 is connected to the normal temperature water supply system.

[0032] In the present application, the dust generating device 5 may adopt patent 201310141719.2 or patent 202020319771.8, or other models may be selected as needed.

[0033] When in use, the electric heater 4 can heat the gas replenished from the gas replenishment port 3, so that the temperature of the gas entering the heat-insulating gas replenishment bin 1 is increased, and then the dust generated by the dust generating device 5 is sent to the dust diffusion tube 6, and after being diffused by the dust diffusion tube 6, it enters the mixing chamber section 22. In normal use, the heat-insulating dust outlet pipe 7 will be connected to the downstream of the heat-insulating mixing bin 2 and powered by the exhaust fan. The gas in the heat-insulating mixing bin 2 together with the gas in the dust diffusion tube 6 will be extracted from the heat-insulating dust outlet pipe 7. At this time, the pressure in the mixing chamber section 22 is reduced, so that the gas in the heat-insulating gas replenishment bin 1 will pass through the honeycomb flow stabilizing plate 23 and the flow stabilizing mesh plate 24. A large number of fine air flows are formed to enter the mixing chamber section 22, so that the replenished air flow will be evenly mixed with the dust emitted by the dust diffusion tube 6. In this way, even if the air extraction volume is large, the gas in the heat-insulating air replenishment bin 1 can be evenly replenished, and there will be no situation of excessive local airflow. The humidifying device provides humidity for the mixing chamber section 22. The outlets of the steam humidifying device and the normal temperature water mist humidifying device are both connected to the mixing chamber section 22. The control of the normal temperature water mist humidity can also be achieved by controlling the opening and closing of different numbers of atomizing nozzles 16. In this way, a high temperature and high humidity environment and a normal temperature and high humidity flue environment can be simulated according to actual environmental simulation requirements.

[0034] The gas circuit system, actuators such as servo motors, gear transmission mechanisms, and lead screw nut mechanisms mentioned in this embodiment are all current conventional technologies. The specific structures and principles and other designs of cylinders, motors, and other transmission mechanisms are disclosed in detail in the "Mechanical Design Manual, Fifth Edition", the 28th printing of the fifth edition in Beijing in April 2008, which belongs to the prior art and its structure is clear. The SMC training textbook "Modern Practical Pneumatic Technology, 3rd Edition" published by the Machinery Industry Press on August 1, 2008 discloses vacuum components, gas circuits, and program control in detail, indicating that the gas circuit structure in this embodiment is also an existing technology and is clear. The book "Motor Drive and Speed ​​Regulation" published by the Chemical Industry Press on July 1, 2015 also introduces the control of the motor and the travel switch in detail. Therefore, the circuit and gas circuit connections are clear.

[0035] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A flue dust environment simulation dust mixing chamber, characterized by: The heat-insulating air-replenishing bin and the heat-insulating mixing bin are interconnected, the heat-insulating air-replenishing bin is provided with an air-replenishing port, the air-replenishing port is connected to an electric heater, a dust-generating device is provided in the heat-insulating air-replenishing bin, the heat-insulating mixing bin comprises an upstream stabilizing flow chamber section and a downstream mixing chamber section, a honeycomb stabilizing flow plate is provided between the stabilizing flow chamber section and the heat-insulating air-replenishing bin, a plurality of stabilizing flow mesh plates perpendicular to the gas flow direction are provided in the stabilizing flow chamber section, a conical dust diffusion tube is provided in the heat-insulating mixing bin, the dust diffusion tube passes through the stabilizing flow chamber section, the upstream end of the dust diffusion tube is a small-diameter end and extends into the heat-insulating air-replenishing bin and is connected with the dust-generating port of the dust-generating device, the downstream end of the dust diffusion tube is a large-diameter end and is connected with the mixing chamber section downstream of the heat-insulating mixing bin, a humidifying device is also connected in the mixing chamber section, and an heat-insulating dust outlet pipe is provided downstream of the mixing chamber section.

2. The flue dust environment simulation dust generating and mixing chamber according to claim 1, characterized in that: The thermal insulation mixing bin is a rectangular mixing bin, and each flow stabilizing mesh plate includes two mesh plate monomers spliced ​​together, and each mesh plate monomer includes a mesh plate frame and a flow stabilizing hole mesh filled in the mesh plate frame. The mesh plate frame is fixed on the cavity wall of the flow stabilizing chamber section, and a semicircular groove portion that is sleeved on the outside of the dust diffusion cylinder is provided on the vertical rod in the middle of the flow stabilizing chamber section on the mesh plate frame. The two semicircular groove portions on the spliced ​​mesh plate monomers cooperate with each other to form a circular groove portion, and the dust diffusion cylinder passes through the circular groove portion and is fixed with a fixing ring, and the fixing ring is detachably fixed to the corresponding circular groove portion.

3. The flue dust environment simulation dust generating and mixing chamber according to claim 1, characterized in that: The humidifying device comprises a steam humidifying device and a normal temperature water mist humidifying device, and the outlets of the steam humidifying device and the normal temperature water mist humidifying device are both communicated with the mixing chamber section.

4. The flue dust environment simulation dust generating and mixing chamber according to claim 3, characterized in that: The steam humidifying device includes a steam box fixed to the outside of the mixing chamber section, wherein a heating water pump, an electric heating device and an air storage tank are arranged in the steam box, wherein the inlet of the heating water pump is communicated with a water supply system, the outlet of the heating water pump is communicated with the inlet of the electric heating device, the outlet of the electric heating device is communicated with the inlet of the air storage tank, the air outlet of the air storage tank is connected with a steam inlet pipe, and the outlet of the steam inlet pipe extends into the mixing chamber section.

5. The flue dust environment simulation dust generating and mixing chamber according to claim 4, characterized in that: A liquid reflux port is provided at the bottom of the gas storage tank, and the liquid reflux port refluxes to the inlet of the heating water pump through a reflux pipeline.

6. The flue dust environment simulation dust generating and mixing chamber according to claim 5, characterized in that: The normal temperature water mist humidification device includes a mist inlet flange arranged on the side wall of the heat-insulating mixing bin, a plurality of atomizing pipe joints are arranged on the mist inlet flange, a plurality of atomizing nozzles are fixed to the downstream end of the dust diffusion cylinder, a pipeline is connected between the atomizing pipe joint and the atomizing nozzle, and the mist inlet flange is connected to the normal temperature water supply system.

7. The flue dust environment simulation dust generating and mixing chamber according to any one of claims 1 to 6, characterized in that: The entire downstream side of the mixing chamber section is a dust outlet, the heat-insulating dust outlet pipe is welded into a constricted shape by several sections of reducing diameter sections with rectangular interfaces, and the upstream end of the heat-insulating dust outlet pipe is fixed on the frame of the mixing chamber section.

8. The flue dust environment simulation dust generating and mixing chamber according to claim 7, characterized in that: The heat-insulating dust outlet pipe is respectively connected with connecting rods at the four corners of the upstream end and the four corners of the downstream end, and the outside of the heat-insulating dust outlet pipe is filled with heat-insulating material between the connecting rods.

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