Flue dust environment simulation dust generation mixing bin

Abstract

The utility model 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 port is arranged on the heat preservation air supply bin, the air supply port is 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 steady flow chamber section and a mixing chamber 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] This utility model relates to the field of dust environment simulation technology, and in particular to a dust generation and mixing chamber for simulating dust environment in flues. Background Technology

[0002] In the field of dust environment simulation, conventional dust environments are generally simulated. Dust environment simulation mainly includes horizontal wind tunnel simulation and vertical settling environment simulation. For example, publication number CN221860213U discloses a vertical high-concentration dust environment simulation device, which simulates a vertical settling environment; while invention publication number CN114235322A discloses a horizontal wind tunnel dust environment simulation. However, neither of these two simulation methods can simulate the chimney / flue environment. The chimney / flue environment has several key characteristics: 1. high temperature; 2. high humidity; 3. high wind speed, making it difficult for the aforementioned two simulation devices to replicate. Simulating the flue dust environment facilitates the calibration of flue dust concentration detection instruments, making flue dust environment simulation particularly important. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dust-generating mixing chamber for simulating a flue dust environment. This mixing chamber generates stable high-temperature and high-humidity dust-laden gas, which meets the requirements of simulating a dust environment with high wind speed, high flow rate, and temperature and humidity control.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a flue dust environment simulation dust generation and mixing chamber, comprising an insulated air supply chamber and an insulated mixing chamber that are interconnected. The insulated air supply chamber is provided with an air supply port, which is connected to an electric heater. A dust generation device is installed inside the insulated air supply chamber. The insulated mixing chamber includes an upstream stabilizing chamber section and a downstream mixing chamber section. A honeycomb stabilizing plate is installed between the stabilizing chamber section and the insulated air supply chamber. A dust generation device is installed inside the stabilizing chamber section. There are several flow stabilizing mesh plates perpendicular to the gas flow direction. A cone-shaped dust diffusion cylinder is installed inside the insulated mixing chamber. The dust diffusion cylinder penetrates the flow stabilizing chamber section. The upstream end of the dust diffusion cylinder is a small-diameter end and extends into the insulated air supply chamber, communicating with the dust emission port of the dust generation device. The downstream end of the dust diffusion cylinder is a large-diameter end and communicates with the mixing chamber section downstream of the insulated mixing chamber. A humidifying device is also connected inside the mixing chamber section. An insulated dust outlet pipe is installed downstream of the mixing chamber section.

[0005] As a preferred embodiment, the insulated mixing chamber is a rectangular mixing chamber. Each flow-stabilizing mesh plate includes two mesh plate units spliced ​​together. Each mesh plate unit includes a mesh plate frame and a flow-stabilizing perforated mesh filling the mesh plate frame. The mesh plate frame is fixed to the cavity wall of the flow-stabilizing chamber section. A semi-circular groove portion is provided on the vertical rod in the middle of the flow-stabilizing chamber section of the mesh plate frame, which is fitted outside the dust diffusion cylinder. The two semi-circular groove portions on the spliced ​​perforated mesh units cooperate to form a circular groove portion. The dust diffusion cylinder passes through the circular groove portion and is fixed with a fixing ring. The fixing ring is detachably fixed to the corresponding circular groove portion.

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

[0007] As a preferred embodiment, the steam humidification device includes a steam box fixed outside the mixing chamber section. The steam box is equipped with a heating water pump, an electric heating device, and a gas storage tank. 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 gas storage tank, and the outlet of the gas storage tank is connected to a steam inlet pipe. The outlet of the steam inlet pipe extends into the mixing chamber section.

[0008] As a preferred embodiment, the bottom of the gas storage tank is provided with a liquid return port, which returns the liquid to the inlet of the heating water pump through a return pipeline.

[0009] As a preferred embodiment, the ambient temperature water mist humidification device includes an inlet flange disposed on the side wall of the insulated mixing chamber, a plurality of atomizing pipe joints disposed on the inlet flange, a plurality of atomizing nozzles fixed at the downstream end of the dust diffusion cylinder, the atomizing pipe joints and the atomizing nozzles being connected by a pipeline, and the inlet flange being connected to an ambient temperature water supply system.

[0010] As a preferred embodiment, the entire downstream side of the mixing chamber section is a dust outlet, and the insulated dust outlet pipe is formed by welding several sections with rectangular interfaces to form a constricted shape. The upstream end of the insulated dust outlet pipe is fixed to the frame of the mixing chamber section.

[0011] As a preferred embodiment, the insulated dust outlet pipe is connected to connecting rods at the four corners of the upstream end and the four corners of the downstream end, and the outside of the insulated dust outlet pipe is filled with insulation material between the connecting rods.

[0012] After adopting the above technical solution, the effect of this utility model is as follows: The flue dust environment simulation dust generation and mixing chamber includes an interconnected insulated air supply chamber and an insulated mixing chamber. The insulated air supply chamber is equipped with an air supply port connected to an electric heater. A dust generation device is installed inside the insulated air supply chamber. The insulated mixing chamber includes an upstream stabilizing chamber section and a downstream mixing chamber section. A honeycomb stabilizing plate is installed between the stabilizing chamber section and the insulated air supply chamber. A dust generation device is installed inside the stabilizing chamber section. There are several flow-stabilizing mesh plates perpendicular to the gas flow direction. A conical dust diffusion cylinder is installed inside the insulated mixing chamber, penetrating the flow-stabilizing chamber section. The upstream end of the dust diffusion cylinder is a small-diameter end that extends into the insulated air supply chamber and communicates with the dust emission port of the dust generating device. The downstream end of the dust diffusion cylinder is a large-diameter end that communicates with the downstream mixing chamber section of the insulated mixing chamber. A humidification device is also connected to the mixing chamber section. An insulated dust outlet pipe is installed downstream of the mixing chamber section. Therefore, the electric heater can heat the injected gas, thereby raising the temperature inside the insulated gas injection chamber. The dust generated by the dust generator is then sent into the dust diffusion cylinder, and after diffusion, it enters the mixing chamber section. During normal use, the insulated dust outlet pipe is connected to the simulation chamber and powered by an exhaust fan. Thus, the gas in the insulated mixing chamber is drawn out from the dust diffusion cylinder through the insulated dust outlet pipe, reducing the pressure inside the mixing chamber. This causes the gas in the insulated gas injection chamber to pass through the honeycomb flow stabilizer and flow stabilizer mesh, forming numerous fine airflows that enter the mixing chamber section. The injected airflow mixes evenly with the dust emitted by the dust diffusion cylinder. Even with a large extraction volume, the gas in the insulated gas injection chamber can be evenly injected, preventing excessive local airflow. The humidification device provides humidity to the mixing chamber section. Therefore, this dust-generating mixing chamber can simulate high-flow, high-temperature, and high-humidity environments such as chimney dust environments.

[0013] Furthermore, since the insulated mixing chamber is a rectangular mixing chamber, each flow stabilizing mesh plate includes two mesh plate units spliced ​​together. Each mesh plate unit includes a mesh plate frame and a flow stabilizing perforated mesh filling the mesh plate frame. The mesh plate frame is fixed to the cavity wall of the flow stabilizing chamber section. A semi-circular groove portion is provided on the vertical rod in the middle of the flow stabilizing chamber section of the mesh plate frame, which is fitted outside the dust diffusion cylinder. The two semi-circular groove portions on the spliced ​​perforated mesh units 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. The fixing ring is detachably fixed to the corresponding circular groove portion. Therefore, the insulated mixing chamber is simple to manufacture, and the flow stabilizing mesh plate is also very convenient to install, and can effectively fix the dust diffusion cylinder.

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

[0015] Furthermore, since the ambient temperature water mist humidification device includes a mist inlet flange installed on the side wall of the insulated mixing chamber, a number of atomizing pipe joints are installed on the mist inlet flange, a number of atomizing nozzles are fixed at the downstream end of the dust diffusion cylinder, the atomizing pipe joints and the atomizing nozzles are connected by pipes, and the mist inlet flange is connected to the ambient temperature water supply system, humidity can be controlled by controlling the opening and closing of different numbers of atomizing nozzles.

[0016] Furthermore, since the entire downstream side of the mixing chamber section is a dust outlet, the insulated dust outlet pipe is formed by welding several sections with rectangular interfaces to form a constricted shape. The upstream end of the insulated dust outlet pipe is fixed to the frame of the mixing chamber section. In this way, when the exhaust fan at the downstream end is drawing air, all the dust-laden air in the entire mixing chamber section can be drawn in, resulting in better uniformity of particulate matter and lower manufacturing difficulty of the insulated dust outlet pipe.

[0017] Furthermore, since the insulated dust outlet pipe is connected to connecting rods at the four corners of the upstream end and the four corners of the downstream end, and the outside of the insulated dust outlet pipe is filled with insulation material between the connecting rods, it is more convenient to fill the insulation material on the outside of the insulated dust outlet pipe. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

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

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

[0021] Figure 3 This is a front view of an embodiment of the present utility model;

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

[0023] Figure 5 This is a structural schematic diagram of an embodiment of the present invention with some parts omitted;

[0024] Figure 6 This is a schematic diagram of another angle showing the structure of the omitted part of the embodiment of this utility model;

[0025] Figure 7This is a schematic diagram of the internal structure of the steam humidification device according to an embodiment of this utility model;

[0026] Figure 8 yes Figure 5 Enlarged view of the structure at point A in the middle;

[0027] In the attached diagram: 1. Insulated air supply chamber; 2. Insulated mixing chamber; 21. Flow stabilizing chamber section; 22. Mixing chamber section; 23. Honeycomb flow stabilizing plate; 24. Flow stabilizing mesh plate; 25. Fixing 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. Air storage tank; 12. Steam inlet pipe; 13. Liquid return port; 14. Atomizing inlet flange; 15. Atomizing pipe connector; 16. Atomizing nozzle; 17. Connecting rod. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments.

[0029] like Figure 1-8 As shown, a flue gas dust environment simulation dust generation and mixing chamber includes an insulated air supply chamber 1 and an insulated mixing chamber 2 that are interconnected. The insulated air supply chamber 1 is equipped with an air supply port 3, which is connected to an electric heater 4. A dust generation device 5 is installed inside the insulated air supply chamber 1. The insulated mixing chamber 2 includes an upstream stabilizing chamber section 21 and a downstream mixing chamber section 22. A honeycomb stabilizing plate 23 is installed between the stabilizing chamber section 21 and the insulated air supply chamber 1. The stabilizing chamber section 21 contains several components aligned with the gas flow direction. A vertical flow stabilizing mesh plate 24 is provided. A conical dust diffusion cylinder 6 is provided inside the insulated mixing chamber 2. The dust diffusion cylinder 6 penetrates the flow stabilizing chamber section 21. The upstream end of the dust diffusion cylinder 6 is a small diameter end and extends into the insulated air replenishment chamber 1, communicating with the dust generation port of the dust generation device 5. The downstream end of the dust diffusion cylinder 6 is a large diameter end and communicates with the mixing chamber section 22 downstream of the insulated mixing chamber 2. A humidifying device is also connected inside the mixing chamber section 22. An insulated dust outlet pipe 7 is provided downstream of the mixing chamber section 22.

[0030] In this embodiment, the entire downstream side of the mixing chamber section 22 serves as the dust outlet. The insulated dust outlet pipe 7 is formed by welding several rectangular variable-diameter sections together to create a constricted shape. The upstream end of the insulated dust outlet pipe 7 is fixed to the frame of the mixing chamber section 22. Connecting rods 17 are connected to the four corners of the upstream end and the four corners of the downstream end of the insulated dust outlet pipe 7, respectively. Insulation material is filled between the connecting rods 17 on the outside of the insulated dust outlet pipe 7. The insulated mixing chamber 2 is a rectangular mixing chamber. Each flow stabilizing mesh plate 24 includes two mesh plate units spliced ​​together. Each mesh plate unit includes a mesh plate frame and a flow stabilizing mesh filled in the mesh plate frame. The mesh plate frame is fixed to the cavity wall of the flow stabilizing chamber section 21. A semi-circular groove portion is provided on the vertical rod in the middle of the flow stabilizing chamber section 21 on the mesh plate frame, which is sleeved on the outside of the dust diffusion cylinder 6. The two semi-circular groove portions on the spliced ​​mesh plate units cooperate with each other to form a circular groove portion. The dust diffusion cylinder 6 passes through the circular groove portion and is fixed with a fixing ring 25. The fixing ring 25 is detachably fixed to the corresponding circular groove portion.

[0031] In this embodiment, the humidification device includes a steam humidification device and a room temperature water mist humidification device. The outlets of both the steam humidification device and the room temperature water mist humidification device are connected to the mixing chamber section 22. The steam humidification device includes a steam box 8 fixed outside the mixing chamber section 22. The steam box 8 is equipped with a heating water pump 9, an electric heating device 10, and a gas storage tank 11. The inlet of the heating water pump 9 is connected to the water supply system, and the outlet of the heating water pump 9 is connected to the inlet of the electric heating device 10. The outlet of the electric heating device 10 is connected to the inlet of the gas storage tank 11. The 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 return port 13 is provided at the bottom of the gas storage tank 11, and the liquid return port 13 returns the liquid to the inlet of the heating water pump 9 through a return pipe. The ambient temperature water mist humidification device includes an inlet flange 14 installed on the side wall of the insulated mixing chamber 2. Several atomizing pipe joints 15 are installed on the inlet flange 14. Several atomizing nozzles 16 are fixed at the downstream end of the dust diffusion cylinder 6. The atomizing pipe joints 15 and the atomizing nozzles 16 are connected by pipes. The inlet flange 14 is connected to the ambient temperature water supply system.

[0032] In this application, the dust generating device 5 can be selected from patent 201310141719.2 or patent 202020319771.8, or other models can be selected as needed.

[0033] In use, the electric heater 4 heats the gas supplied from the gas inlet 3, raising the temperature of the gas entering the insulated gas supply chamber 1. The dust generated by the dust generator 5 is then sent into the dust diffusion cylinder 6, and after diffusion, it enters the mixing chamber section 22. During normal use, the insulated dust outlet pipe 7 is connected to the downstream of the insulated mixing chamber 2 and powered by an exhaust fan. The gas in the insulated mixing chamber 2, along with the gas in the dust diffusion cylinder 6, is drawn out through the insulated dust outlet pipe 7. At this time, the pressure in the mixing chamber section 22 decreases, allowing the gas in the insulated gas supply chamber 1 to pass through the honeycomb flow stabilizer plate 23 and the flow stabilizer mesh plate 24. Numerous fine airflows are generated and enter the mixing chamber section 22. This replenishment airflow mixes evenly with the dust emitted from the dust diffusion cylinder 6. Even with a large extraction volume, the gas in the heat-insulating air supply chamber 1 can be replenished evenly, preventing excessive local airflow. The humidification device provides humidity to the mixing chamber section 22. The outlets of the steam humidification device and the room temperature water mist humidification device are both connected to the mixing chamber section 22. The room temperature water mist humidity can also be controlled by opening and closing different numbers of atomizing nozzles 16. This allows for the simulation of high temperature and high humidity environments and room temperature and high humidity flue environments according to actual environmental simulation requirements.

[0034] The pneumatic system, servo motor and other actuators, gear transmission mechanism, and lead screw and nut mechanism mentioned in this embodiment are all current conventional technologies. The 5th edition of the "Mechanical Design Handbook" published in Beijing in April 2008 (5th edition, 28th printing) details the specific structure, principle, and other designs of cylinders, motors, and other transmission mechanisms, which are existing technologies with clear and straightforward structures. The 3rd edition of "Modern Practical Pneumatic Technology" SMC training materials published by Machinery Industry Press on August 1, 2008, details vacuum components, gas circuits, and program control, indicating that the pneumatic structure in this embodiment is also existing technology and clear and straightforward. The book "Motor Drive and Speed ​​Regulation" published by Chemical Industry Press on July 1, 2015, also details motor control and limit switches. Therefore, the circuit and pneumatic connections are clear.

[0035] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations made to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A flue gas dust environment simulation dust generation mixing chamber, characterized in that: The device includes an insulated air-replenishing chamber and an insulated mixing chamber that are interconnected. The insulated air-replenishing chamber is equipped with an air-replenishing port, which is connected to an electric heater. A dust-generating device is installed inside the insulated air-replenishing chamber. The insulated mixing chamber includes an upstream stabilizing chamber section and a downstream mixing chamber section. A honeycomb stabilizing plate is installed between the stabilizing chamber section and the insulated air-replenishing chamber. Several stabilizing mesh plates perpendicular to the gas flow direction are installed inside the stabilizing chamber section. A conical dust diffusion cylinder is installed inside the insulated mixing chamber, penetrating the stabilizing chamber section. The upstream end of the dust diffusion cylinder is a small-diameter end that extends into the insulated air-replenishing chamber and communicates with the dust-generating port of the dust-generating device. The downstream end of the dust diffusion cylinder is a large-diameter end that communicates with the downstream mixing chamber section of the insulated mixing chamber. A humidifying device is also connected inside the mixing chamber section. An insulated dust outlet pipe is installed downstream of the mixing chamber section.

2. The flue dust environment simulation dust generation mixing chamber as described in claim 1, characterized in that: The insulated mixing chamber is a rectangular mixing chamber. Each flow stabilizing mesh plate includes two mesh plate units spliced ​​together. Each mesh plate unit includes a mesh plate frame and a flow stabilizing mesh filled in the mesh plate frame. The mesh plate frame is fixed to the cavity wall of the flow stabilizing chamber section. A semi-circular groove portion is provided on the vertical rod in the middle of the flow stabilizing chamber section of the mesh plate frame, which is fitted outside the dust diffusion cylinder. The two semi-circular groove portions on the spliced ​​mesh plate units 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. The fixing ring is detachably fixed to the corresponding circular groove portion.

3. The flue dust environment simulation dust generation mixing chamber as described in claim 1, characterized in that: The humidification device includes a steam humidification device and a room temperature water mist humidification device, and the outlets of the steam humidification device and the room temperature water mist humidification device are both connected to the mixing chamber section.

4. The flue dust environment simulation dust mixing chamber as described in claim 3, characterized in that: The steam humidification device includes a steam box fixed outside the mixing chamber section. The steam box is equipped with a heating water pump, an electric heating device, and a gas storage tank. 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 gas storage tank, and the outlet of the gas storage tank is connected to a steam inlet pipe. The outlet of the steam inlet pipe extends into the mixing chamber section.

5. The flue dust environment simulation dust mixing chamber as described in claim 4, characterized in that: The bottom of the gas storage tank is provided with a liquid return port, which returns the liquid to the inlet of the heating water pump through a return pipeline.

6. The flue dust environment simulation dust mixing chamber as described in claim 5, characterized in that: The ambient temperature water mist humidification device includes a mist inlet flange installed on the side wall of the insulated mixing chamber, a plurality of atomizing pipe joints installed on the mist inlet flange, a plurality of atomizing nozzles fixed at the downstream end of the dust diffusion cylinder, a pipe connecting the atomizing pipe joints and the atomizing nozzles, and the mist inlet flange connected to the ambient temperature water supply system.

7. The flue dust environment simulation dust generation mixing chamber as described in any one of claims 1-6, characterized in that: The entire downstream side of the mixing chamber section is a dust outlet. The insulated dust outlet pipe is formed by welding several rectangular variable diameter sections to form a constricted shape. The upstream end of the insulated dust outlet pipe is fixed to the frame of the mixing chamber section.

8. The flue dust environment simulation dust generation mixing chamber as described in claim 7, characterized in that: The insulated dust outlet pipe is connected to connecting rods at the four corners of the upstream end and the four corners of the downstream end, and the outside of the insulated dust outlet pipe is filled with insulation material between the connecting rods.

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