Test platform for bituminous mixture equipment burner

Abstract

The invention relates to the technical field of combustor test, and discloses a test platform for an asphalt mixture equipment combustor, the test platform comprises a base, a test platform hearth, a hybrid demisting tower and a first induced draft fan, the upper end of the base is provided with a combustor, and the output end of the combustor is connected with the test platform hearth; the air outlet end of the test platform hearth is connected with the hybrid demisting tower and the detection pipeline, the air outlet end of the hybrid demisting tower is connected with the first induced draft fan, the hybrid demisting tower comprises a tower frame, a spraying mechanism and a first water pump, the tower frame is provided with a water tank, the upper end of the tower frame is provided with a demisting cavity, the side wall of the water tank is provided with an air inlet, and the upper end of the demisting cavity is provided with an air outlet; a communicating pipe is arranged between the water tank and the demisting cavity, a rotational flow plate is arranged in the communicating pipe, the first water pump is installed on the side wall of the water tank, the spraying mechanism is arranged in the demisting cavity, and the first water pump is connected with the spraying mechanism. According to the invention, generated waste gas is subjected to four-stage treatment of rotational flow, spraying, filtering and centrifugal demisting, and is discharged after reaching the standard through a tail end fan.

Description

Technical Field

[0001] This invention relates to the field of burner research and development technology for asphalt mixture mixing equipment, specifically to a test platform for burners in asphalt mixture equipment. Background Technology

[0002] In the research and development and improvement of asphalt mixing equipment, the burner, as a core component, directly affects the aggregate drying effect and the overall energy efficiency of the equipment. Traditionally, burner testing usually requires temporary setup and trial operation at the factory site, a time-consuming and inconvenient process. Furthermore, traditional testing platforms generally lack built-in integrated exhaust gas sampling systems, preventing operators from directly and effectively capturing raw exhaust gas samples while the burner is running stably. This technological deficiency makes accurate analysis of key exhaust gas components difficult, severely hindering precise calibration of the burner's air-fuel ratio based on real data and effective optimization of pollutant reduction technologies.

[0003] More significantly, traditional experimental platforms suffer from serious deficiencies in waste gas treatment. Lacking dedicated waste gas purification devices, especially demisting and multi-stage treatment equipment, the high-temperature waste gas generated during combustion is often directly emitted without effective treatment. Alternatively, to meet environmental requirements, it may be necessary to activate a complete set of high-power back-end environmental protection equipment. This not only significantly increases experimental costs but also makes real-time monitoring and sampling analysis of waste gas impossible during the experiment. In the long run, this extensive experimental approach not only poses environmental risks but also fails to meet the dual requirements of modern R&D for data acquisition and environmental protection.

[0004] In view of this, the applicant conducted in-depth research on the above-mentioned issues, which led to this case. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a test platform for burners in asphalt mixture equipment. The generated exhaust gas undergoes four stages of treatment: swirl, spray, filtration, and centrifugal demisting, before being discharged in compliance with emission standards via a terminal fan.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A test platform for a burner in an asphalt mixture equipment includes a base, a test platform furnace, a hybrid demisting tower, and a first induced draft fan. The burner is mounted on the upper end of the base, and its output end is connected to the test platform furnace. The exhaust end of the test platform furnace is connected to the inlet end of the hybrid demisting tower. The exhaust end of the test platform furnace is also equipped with a heat exchanger and a detection pipe. The exhaust end of the hybrid demisting tower is connected to the first induced draft fan. The hybrid demisting tower includes a tower frame, a spraying mechanism, and a first water pump. A water tank is located at the lower end of the tower frame, and a demisting chamber is located at the upper end of the tower frame. An air inlet is located on the side wall of the water tank, and an air outlet is located at the upper end of the demisting chamber. A connecting pipe is provided between the water tank and the demisting chamber, and a swirl plate is installed inside the connecting pipe. The first water pump is mounted on the side wall of the water tank, and the spraying mechanism is located inside the demisting chamber. The first water pump is connected to the spraying mechanism.

[0008] Furthermore, the demisting chamber includes a centrifugal demisting layer, a filter layer, and a spray layer that are separated into upper and lower sections. The spray layer is equipped with a support rod. The spraying mechanism includes a water inlet pipe, a water distribution pipe, and a nozzle. The water distribution pipe is fixedly connected to the support rod. One end of the water inlet pipe is connected to the first water pump, and the other end of the water inlet pipe is connected to the water distribution pipe. The nozzle is connected to the water distribution pipe.

[0009] Furthermore, each nozzle is positioned above the connecting pipe in a corresponding manner.

[0010] Furthermore, the filter layer is provided with a support frame, the support frame is provided with a sliding groove, and the sliding groove is provided with a filter media assembly.

[0011] Furthermore, the rear side wall of the demisting chamber is provided with an opening, and the side wall of the opening is provided with a cover plate that is rotatably connected.

[0012] Furthermore, the filter media assembly uses ceramic Pall ring filter media material.

[0013] Furthermore, a centrifugal demister is installed inside the centrifugal demister layer.

[0014] Furthermore, the air inlet is connected to the furnace of the test platform via an exhaust gas pipe.

[0015] Furthermore, the air outlet is connected to the first induced draft fan via an air outlet pipe.

[0016] Furthermore, the exhaust gas pipe is connected to the inlet end of the heat exchanger, the outlet end of the heat exchanger is connected to the inlet end of the detection pipe, the outlet end of the detection pipe is connected to the exhaust gas pipe, and the side wall of the detection pipe is provided with a detection port.

[0017] This invention provides a test platform for burners in asphalt mixture equipment. It has the following beneficial effects:

[0018] 1. In the heat exchanger of the present invention, through the circulating water system, a small amount of high-temperature exhaust gas used for sampling is safely cooled to normal temperature or an operable temperature, avoiding the risk of high-temperature scalding. Moreover, the sampling process is carried out without removing any substances in the exhaust gas, ensuring that the sample composition is consistent with the true exhaust gas composition at the furnace outlet, providing the possibility for accurate pollutant analysis.

[0019] 2. The integrated hybrid demisting tower of the present invention adopts a multi-stage collaborative purification mechanism. The exhaust gas is successively passed through multi-stage purification processes such as swirl plate centrifugal pretreatment, alkaline reagent spraying and neutralization, ceramic pall ring filtration and adsorption, and centrifugal demisting and dehydration, etc., which can efficiently remove pollutants such as particulate matter, oil droplets and acidic gases in the exhaust gas. Finally, the dry and clean up-to-standard gas discharged by the first induced draft fan at the end fundamentally solves the exhaust gas pollution problem during the test process and eliminates the environmental protection hidden danger.

[0020] 3. The hybrid demisting tower of the present invention is a compact and high-efficiency purification device designed specifically for the test platform, and its power is much lower than that of the large environmental protection equipment supporting the whole asphalt mixing equipment. Preliminary dust removal is carried out by using the kinetic energy of the exhaust gas itself to generate centrifugal force through the swirl plate, and the recycling of the spraying liquid is realized through the first water pump and the water tank, greatly reducing the consumption of water and electric energy. Making the frequent burner tests no longer a high-cost activity is conducive to promoting the in-depth development of research and development work.

[0021] 4. The present invention integrates the hybrid demisting tower as a standard module of the test platform for integrated design, making the entire platform a self-contained system without relying on external large environmental protection facilities. Researchers can complete the full set of burner tests including exhaust gas treatment in a standard laboratory, avoiding the cumbersome process of temporarily docking external environmental protection equipment for each test. Greatly improving the convenience of the test enables the platform to be applicable to various research and development and quality inspection environments.

[0022] 5. In the present invention, the filter element assembly can be easily pushed in or pulled out like a drawer, which is convenient for cleaning or replacement. In addition, the openable cover plate provided on the rear side wall of the demisting chamber provides great convenience for the inspection and maintenance of internal components such as spray nozzles and swirl plates. It can effectively reduce the downtime during equipment maintenance and ensure the long-term stable operation of the test platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional view of the external structure of the present invention;

[0024] Figure 2 is a three-dimensional view of the external structure of the hybrid demisting tower;

[0025] Figure 3 is another three-dimensional view of the external structure of the hybrid demisting tower;

[0026] Figure 4 This is a cross-sectional front view of the hybrid demister;

[0027] Figure 5 This is a cross-sectional perspective view of the hybrid demister.

[0028] Figure 6 This is a schematic cross-sectional view of the heat exchanger.

[0029] Figure 7 for Figure 5 A magnified view of a portion of region A in the middle.

[0030] The components include: base 1, burner 11, test platform furnace 2, hybrid demister 3, tower 31, water tank 311, demister chamber 312, centrifugal demister layer 3121, filter layer 3122, spray layer 3123, air inlet 313, air outlet 314, spray mechanism 32, water inlet pipe 321, water distribution pipe 322, nozzle 323, first water pump 33, connecting pipe 34, swirl plate 341, support rod 35, support frame 36, slide 361, filter media assembly 362, cover plate 37, centrifugal demister 38, first induced draft fan 4, exhaust gas pipe 51, exhaust gas pipe 52, heat exchanger 6, outer shell 61, inlet valve 62, second induced draft fan 63, outlet valve 64, coil 65, second water pump 66, circulating water inlet 67, circulating water outlet 68, detection pipe 7, and external water tank 8. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see the appendix Figure 1 -Appendix Figure 7This invention provides a test platform for a burner in an asphalt mixture equipment, comprising a base 1, a test platform furnace 2, a hybrid demister 3, and a first induced draft fan 4. A burner 11 is mounted on the upper end of the base 1, and the output end of the burner 11 is connected to the test platform furnace 2. An observation port is provided on the test platform furnace 2. The flame combustion pattern can be observed through the observation port, and the flame size can be adjusted based on the temperature feedback from the thermocouple at the furnace exhaust port. The exhaust end of the test platform furnace 2 is connected to the inlet end of the hybrid demister 3, and the exhaust end of the hybrid demister 3 is connected to the first induced draft fan 4. Specifically, the inlet end of the hybrid demister 3 is connected to the test platform furnace 2 via an exhaust gas pipe 51, and the exhaust end of the hybrid demister 3 is connected to the first induced draft fan 4 via an exhaust pipe 52. The hybrid demisting tower 3 includes a tower 31, a spraying mechanism 32, and a first water pump 33. A water tank 311 is located at the lower end of the tower 31, and a demisting chamber 312 is located at the upper end of the tower 31. An air inlet 313 is located on the side wall of the water tank 311, and an air outlet 314 is located at the upper end of the demisting chamber 312. A connecting pipe 34 is provided between the water tank 311 and the demisting chamber 312. A rotatable swirl plate 341 is installed inside the connecting pipe 34. The first water pump 33 is installed on the outer wall of the water tank 311. The spraying mechanism 32 is located inside the demisting chamber 312, and the first water pump 33 is connected to the spraying mechanism 32, supplying water from the water tank 311 to the spraying mechanism 32. After the exhaust gas enters the bottom of the tower 31 through the air inlet 313, it rises through the connecting pipe 34 and forms a high-speed rotating airflow through the internal swirl plate 341, generating a strong centrifugal force. Centrifugal force throws particulate matter, oil droplets, or liquid-soluble pollutants in the exhaust gas toward the wall of the connecting pipe 34, and some of them are collected after directly impacting the wall of the connecting pipe 34 or the inner wall of the tower 31.

[0033] In this embodiment, the demisting chamber 312 includes a centrifugal demisting layer 3121, a filter layer 3122, and a spray layer 3123, which are separated into upper and lower sections. This top-down hierarchical design ensures that each stage can efficiently complete its core purification task, resulting in a clear process, high purification efficiency, and avoiding interference between different processes. A support rod 35 is provided inside the spray layer 3123. The spray mechanism 32 includes a water inlet pipe 321, a water distribution pipe 322, and spray nozzles 323. The water distribution pipe 322 is fixedly connected to the support rod 35. One end of the water inlet pipe 321 is connected to the first water pump 33, and the other end of the water inlet pipe 321 is connected to the water distribution pipe 322. The spray nozzles 323 are connected to the water distribution pipe 322. Furthermore, four connecting pipes 34 are specifically provided, with each spray nozzle 323 correspondingly positioned above the connecting pipe 34. With the above structure, while the exhaust gas undergoes centrifugal separation through the connecting pipe 34, the spraying mechanism 32 sprays a spray liquid containing alkaline agents downwards through the nozzle 323. This forms a dense water curtain on the cross-section of the spray layer 3123, ensuring that the exhaust gas rising from the lower connecting pipe 34 can fully contact and react with the alkaline droplets. By positioning the nozzle 323 directly above the connecting pipe 34, the exhaust gas, after swirl pretreatment, can be sprayed and neutralized immediately, improving reaction efficiency and purification effect.

[0034] In this embodiment, a support frame 36 is provided on the filter layer 3122, and a sliding groove 361 extending along the front-rear direction of the tower 31 is provided on the support frame 36. A filter media assembly 362 is slidably connected on the sliding groove 361. The rear side wall of the demisting chamber 312 has an opening, and the side wall of the opening has a cover plate 37 that is rotatably connected. Furthermore, the outer shell of the filter media assembly 362 is provided with a handle, so that during use, the cover plate 37 can be opened to pull out the filter media assembly 362 on the support frame 36 for replacement, making maintenance more convenient. At the same time, it also provides great convenience for the inspection and maintenance of internal components such as the nozzle 323 and the swirl plate 341. More specifically, the filter components in the filter media assembly 362 are made of ceramic Pall ring filter media. Ceramic Pall rings have the advantages of large specific surface area, high porosity, corrosion resistance, and low pressure drop. As a filter media, it can efficiently adsorb residual fine pollutants and droplets in the exhaust gas, while providing sufficient contact area for the gas and liquid phases, further promoting chemical reactions and physical interception.

[0035] In this embodiment, a centrifugal demister 38 is installed within the centrifugal demister layer 3121. The centrifugal demister 38 utilizes existing centrifugal demister equipment. It forces the gas carrying water mist to rotate at high speed, using centrifugal force to throw water droplets, which are much denser than gases, towards the wall. The water droplets condense and collect upon impact with the wall, eventually dripping downwards, thus achieving complete separation of water and gas. The gas treated by this process has extremely low water content, thus achieving gas drying.

[0036] In addition, in this embodiment, a heat exchanger 6 and a detection pipe 7 are also provided on the side of the exhaust gas pipe 51. The detection pipe 7 is existing technology and has a detection port for collecting exhaust gas for testing. The inlet end of the heat exchanger 6 is connected to the exhaust gas pipe 51, and the outlet end of the heat exchanger 6 is connected to the inlet end of the detection pipe 7. The outlet end of the detection pipe 7 is also connected to the exhaust gas pipe 51. The heat exchanger 6 includes a housing 61. The inlet end of the housing 61 is provided with an inlet valve 62, and the outlet end of the housing 61 is connected to a second induced draft fan 63. The outlet end of the second induced draft fan 63 is provided with an outlet valve 64, and the outlet valve 64 is connected to the detection pipe 7. The outer casing 61 contains a coil 65, with its two ends connected to the air inlet and outlet of the casing 61, respectively. The casing 61 is equipped with a second water pump 66, a circulating water inlet 67, and a circulating water outlet 68. An external water tank 8 is located on the side of the heat exchanger 6. The second water pump 66 draws water from the external water tank 8 into the casing 61 through the circulating water inlet 67, and then discharges it back into the external water tank 8 through the circulating water outlet 68, thus achieving circulating water flow inside the casing 61. When waste gas sampling is required for testing, the test pipeline valve is opened, and the heat exchanger 6 is started. A portion of the waste gas in the waste gas pipeline 51 flows into the heat exchanger 6. The heat exchanger 6 reduces the temperature of the small amount of high-temperature waste gas to a collectable temperature. Without removing any substances from the waste gas, the waste gas is collected through the detection port on the detection pipeline 7 as the test sample. Furthermore, the coil design inside the heat exchanger 6 increases the contact area between the waste gas and the internal circulating water, reducing the gas temperature at the detection end and facilitating sampling and testing.

[0037] The working principle of this invention: This invention employs a test furnace and adjustable mounting base compatible with various types of burners 11. After the burner 11 is installed and started, the flame posture can be observed through the furnace observation port. A thermocouple is installed at the flue gas outlet of the furnace to detect the flame temperature inside the furnace. The exhaust gas first enters the exhaust gas pipe 51. The exhaust gas pipe 51 has a detection branch, which is a detection pipe 7 for detecting various indicators of the exhaust gas. When sampling is required, the pipe valve is opened, and the pipe passes through a heat exchanger 6 to reduce a small amount of high-temperature exhaust gas to a collectable temperature. Without removing any substances from the exhaust gas, the exhaust gas is collected through the detection port of the detection pipe 7 as a test sample. The remaining majority of the exhaust gas passes through the hybrid demister 3, where the generated exhaust gas undergoes four stages of treatment: cyclone, spray, filtration, and centrifugal demisting, before being discharged through the first induced draft fan at the end to meet emission standards.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test platform for burners in asphalt mixture equipment, characterized in that, The system includes a base, a test platform furnace, a hybrid demisting tower, and a first induced draft fan. A burner is installed on the upper end of the base, and the output end of the burner is connected to the test platform furnace. The air outlet of the test platform furnace is connected to the air inlet of the hybrid demisting tower. The air outlet of the test platform furnace is also equipped with a heat exchanger and a detection pipe. The air outlet of the hybrid demisting tower is connected to the first induced draft fan. The hybrid demisting tower includes a tower frame, a spraying mechanism, and a first water pump. A water tank is located at the lower end of the tower frame, and a demisting chamber is located at the upper end of the tower frame. An air inlet is located on the side wall of the water tank, and an air outlet is located at the upper end of the demisting chamber. A connecting pipe is provided between the water tank and the demisting chamber, and a swirl plate is installed inside the connecting pipe. The first water pump is installed on the side wall of the water tank, and the spraying mechanism is located inside the demisting chamber. The first water pump is connected to the spraying mechanism.

2. The test platform for burners in asphalt mixture equipment according to claim 1, characterized in that, The demisting chamber includes a centrifugal demisting layer, a filter layer, and a spray layer that are separated into upper and lower sections. A support rod is provided inside the spray layer. The spraying mechanism includes an inlet pipe, a distribution pipe, and a nozzle. The distribution pipe is fixedly connected to the support rod. One end of the inlet pipe is connected to the first water pump, and the other end of the inlet pipe is connected to the distribution pipe. The nozzle is connected to the distribution pipe.

3. The test platform for burners in asphalt mixture equipment according to claim 2, characterized in that, Each nozzle is positioned above the connecting pipe in a corresponding manner.

4. The test platform for an asphalt mixture equipment burner according to claim 2, characterized in that, The filter layer is provided with a support frame, the support frame is provided with a sliding groove, and the sliding groove is provided with a filter media assembly.

5. The test platform for an asphalt mixture equipment burner according to claim 4, characterized in that, The rear side wall of the demisting chamber has an opening, and the side wall of the opening has a cover plate that is rotatably connected.

6. The test platform for an asphalt mixture equipment burner according to claim 4, characterized in that, The filter media assembly uses ceramic Pall ring filter media material.

7. The test platform for an asphalt mixture equipment burner according to claim 4, characterized in that, A centrifugal demister is installed inside the centrifugal demister layer.

8. The test platform for burners in asphalt mixture equipment according to claim 1, characterized in that, The air inlet is connected to the furnace of the test platform via an exhaust gas pipe.

9. A test platform for an asphalt mixture equipment burner according to claim 8, characterized in that, The air outlet is connected to the first induced draft fan via an air outlet pipe.

10. A test platform for an asphalt mixture equipment burner according to claim 8, characterized in that, The exhaust gas duct is connected to the inlet end of the heat exchanger, the outlet end of the heat exchanger is connected to the inlet end of the detection duct, the outlet end of the detection duct is connected to the exhaust gas duct, and the side wall of the detection duct is provided with a detection port.

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