A test device for waste heat recovery of semi-coke

Abstract

This invention discloses a semi-coke waste heat recovery test device, comprising: a storage silo and a heat exchange cylinder mounted on a frame; the top of the storage silo has a feeding port and an exhaust port, and an electric heating assembly is installed inside the storage silo; the heat exchange cylinder includes a high-temperature section heat exchange cylinder, a medium-temperature section heat exchange cylinder, and a low-temperature section heat exchange cylinder connected sequentially from top to bottom; the storage silo outlet is connected to the top of the high-temperature section heat exchange cylinder, and the lower end of the low-temperature section heat exchange cylinder has a heat exchange cylinder outlet with a discharge regulating control valve; the storage silo outlet is equipped with a control valve to control the opening and closing of the storage silo outlet; high-temperature heat exchange tube assemblies are installed inside the high-temperature section heat exchange cylinder, medium-temperature heat exchange tube assemblies are installed inside the medium-temperature section heat exchange cylinder, and low-temperature heat exchange tube assemblies are installed inside the low-temperature section heat exchange cylinder. The advantages of this invention are: it enables the testing of semi-coke flowability and dynamic heat transfer coefficient, thus providing strong support for the design of semi-coke waste heat recovery equipment.

Description

Technical Field

[0001] This invention relates to the technical field of experimental equipment for waste heat recovery of semi-coke. Background Technology

[0002] Semi-coke is a solid product obtained from the pyrolysis of low-rank coal at medium and low temperatures, and is widely used in metallurgy, chemical industry, calcium carbide industry, and other sectors. The output temperature of semi-coke is typically between 300 and 600℃, containing a large amount of high-quality sensible heat. Traditional semi-coke production generally employs a wet quenching process, which not only wastes a significant amount of heat energy but also generates wastewater containing phenols and cyanides and harmful gases, severely polluting the environment.

[0003] Currently, research on semi-coke waste heat recovery technology mainly focuses on industrial applications, such as dry quenching systems and waste heat boilers. However, during the process development stage, there is a lack of experimental equipment capable of systematically testing key parameters of semi-coke waste heat recovery. Existing technologies have the following shortcomings: 1. Lack of multi-condition simulation capabilities; 2. Inadequate heat transfer coefficient testing methods, resulting in a lack of reliable experimental data support for industrial scale-up design; 3. Poor material uniformity in the experimental device, with semi-coke particles prone to segregation and accumulation during the falling process, leading to uneven heating of the heat exchange surface and poor repeatability and reliability of experimental results.

[0004] Therefore, there is an urgent need for a functionally integrated, safe, reliable, and data-accurate semi-coke waste heat recovery test device to provide reliable test data for the industrial application of semi-coke waste heat recovery technology. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a semi-coke waste heat recovery test device with a simple structure, which can provide reliable test basis for the industrial application of semi-coke waste heat recovery process.

[0006] To solve the above problems, the technical solution adopted by the present invention is: a semi-coke waste heat recovery test device, comprising: a frame, on which a storage bin and a heat exchange cylinder are arranged sequentially from top to bottom, a feeding port and an exhaust port are provided at the top of the storage bin, and an electric heating component is provided inside the storage bin; The heat exchange cylinder includes a high-temperature section heat exchange cylinder, a medium-temperature section heat exchange cylinder, and a low-temperature section heat exchange cylinder connected sequentially from top to bottom. The discharge port of the storage silo is connected to the top of the high-temperature section heat exchange cylinder. The lower end of the low-temperature section heat exchange cylinder is equipped with a heat exchange cylinder discharge port with a discharge regulating control valve. The discharge port of the storage silo is equipped with a control valve to control the opening and closing of the storage silo discharge port. The high-temperature section heat exchange cylinder is equipped with a high-temperature heat exchange tube assembly, which includes several serpentine heat exchange tube panels arranged at intervals. Each serpentine heat exchange tube panel is arranged vertically, and a high-temperature heat exchange channel is formed between adjacent serpentine heat exchange tube panels. A high-temperature heat exchange channel inlet temperature sensor and a high-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the high-temperature heat exchange channel. The medium-temperature heat exchanger cylinder is equipped with a medium-temperature heat exchanger tube assembly, which includes several serpentine medium-temperature water-cooled heat exchanger tube panels arranged at intervals. Each serpentine medium-temperature water-cooled heat exchanger tube panel is arranged vertically, and a medium-temperature heat exchange channel is formed between adjacent serpentine medium-temperature water-cooled heat exchanger tube panels. A medium-temperature heat exchange channel inlet temperature sensor and a medium-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the medium-temperature heat exchange channel. The low-temperature section heat exchange cylinder is equipped with a low-temperature heat exchange tube assembly, which includes several serpentine low-temperature water-cooled heat exchange tube panels arranged at intervals. Each serpentine low-temperature water-cooled heat exchange tube panel is arranged vertically, and a low-temperature heat exchange section channel is formed between adjacent serpentine low-temperature water-cooled heat exchange tube panels. Low-temperature heat exchange channel inlet temperature sensor and low-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the low-temperature heat exchange channel. Material distribution components are installed in the heat exchange cylinders above the high-temperature heat exchange channel, above the medium-temperature heat exchange channel, and above the low-temperature heat exchange section channel.

[0007] Furthermore, in the aforementioned semi-coke waste heat recovery test device, a nitrogen input pipe is installed inside the storage silo, and the nitrogen input pipe is connected to a nitrogen source outside the storage silo.

[0008] Furthermore, in the aforementioned semi-coke waste heat recovery test device, a feeding port is provided on each of the two sides of the top of the storage silo, and one of the feeding ports also serves as an explosion-proof port.

[0009] Furthermore, in the aforementioned semi-coke waste heat recovery test device, an observation window is provided at the upper end of the high-temperature section heat exchange cylinder.

[0010] Furthermore, in the aforementioned semi-coke waste heat recovery test device, the bulk material assembly includes: several conical bulk material cones with diameters gradually increasing from top to bottom; the upper end of the high-temperature section heat exchange cylinder is a conical cylinder with diameters gradually increasing from top to bottom; a bulk material cone is provided above the high-temperature heat exchange channel, and this bulk material cone is located at the upper end of the high-temperature section heat exchange cylinder below the control valve at the outlet of the storage silo; at least two rows of bulk material cones are provided above the medium-temperature heat exchange channel and above the low-temperature heat exchange section channel, with a material discharge gap between adjacent bulk material cones; each row of bulk material cones is evenly distributed and spaced at the same height position within the heat exchange cylinder, and the upper and lower adjacent rows of bulk material cones are staggered.

[0011] Furthermore, in the aforementioned semi-coke waste heat recovery test device, baffles are provided on the outer walls of the heat exchange cylinder of the bulk material assembly above the medium-temperature heat exchange channel and the bulk material assembly above the low-temperature heat exchange section channel, arranged from top to bottom and inward.

[0012] Furthermore, in the aforementioned semi-coke waste heat recovery test device, a feeding device is provided on the frame. The feeding device includes a feeding hopper and an electric hoist. The feeding hopper can be lowered to pick up materials or raised to feed materials from the feeding port under the drive of the electric hoist.

[0013] Furthermore, in the aforementioned semi-coke waste heat recovery test device, at least two outlet ports of the heat exchange cylinder are provided.

[0014] Furthermore, in the aforementioned semi-coke waste heat recovery test device, the electric heating component in the storage silo consists of several sets of independently heating electric heating rods. Each set of electric heating rods is equipped with a storage silo temperature sensor, and the electric heating rods are evenly arranged on the top of the storage silo and in the main body of the storage silo.

[0015] Furthermore, in the aforementioned semi-coke waste heat recovery test device, the lower end of the storage silo is a cone shape with a diameter that gradually decreases from top to bottom.

[0016] The advantages of this invention are as follows: This application provides a semi-coke waste heat recovery test device with a simple structure, capable of performing flowability and dynamic heat transfer coefficient tests on semi-coke, thus providing strong support for the design of semi-coke waste heat recovery equipment. Each set of electric heating rods in the storage silo can work independently. Once the temperature monitored by the temperature sensor at the corresponding location exceeds the preset value, heating stops, effectively avoiding local overheating and improving the accuracy of experimental data. In addition, material distribution components are installed in the heat exchange cylinders above the high-temperature heat exchange channel, the medium-temperature heat exchange channel, and the low-temperature heat exchange section channel. The placement of the material distribution components allows the semi-coke to fall evenly into the high-temperature heat exchange channel, the medium-temperature heat exchange channel, and the low-temperature heat exchange section channel, avoiding segregation and accumulation during the falling process. At the same time, as the material passes through the material distribution device, the material undergoes enhanced mixing and heat exchange during the deflection process, resulting in uniform heating of the material, thereby further improving the accuracy of experimental data and providing reliable experimental basis for the design of semi-coke waste heat recovery equipment and the industrial application of semi-coke waste heat recovery technology. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a semi-coke waste heat recovery test device described in this application.

[0018] Figure 2 This is a schematic diagram of the arrangement of the heat exchange tube panels inside the heat exchange cylinder. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments.

[0020] like Figure 1 , Figure 2 As shown, a semi-coke waste heat recovery test device includes: a frame 1, on which a storage silo 2 and a heat exchange cylinder 3 are arranged sequentially from top to bottom. The top of the storage silo 1 is provided with a feeding port and an exhaust port 13, and a breather valve is installed at the exhaust port 13. The storage silo outlet 14 is provided with a control valve 141 for controlling the opening and closing of the storage silo outlet 14; in this embodiment, the control valve is a slide gate valve. The lower end of the storage silo 1 is tapered, with its diameter gradually decreasing from top to bottom, which effectively guides the material feeding.

[0021] An electric heating assembly is installed inside the storage silo 1. The electric heating assembly inside the storage silo 1 consists of several sets of independently heating electric heating rods. A storage silo temperature sensor is installed at the position of each set of electric heating rods. The electric heating rods are evenly distributed in the top and body of the storage silo 1.

[0022] In this embodiment, to ensure uniform feeding of materials into the storage silo 1, a feeding port is provided on each of the two sides of the top of the storage silo 1. The two feeding ports are designated as a first feeding port 11 and a second feeding port 12. The second feeding port 12 also serves as an explosion-proof port, and an explosion-proof valve is installed in the second feeding port 12. The explosion-proof valve must be removed before feeding and then reinstalled in the second feeding port 12 after feeding is complete. A nitrogen inlet pipe 15 is installed inside the storage silo 1, and the nitrogen inlet pipe 15 is connected to a nitrogen source outside the storage silo 1. The lower end of the storage silo 1 is conical in shape, with the diameter gradually decreasing from top to bottom.

[0023] The heat exchange cylinder 3 includes a high-temperature section heat exchange cylinder 31, a medium-temperature section heat exchange cylinder 32 and a low-temperature section heat exchange cylinder 33 connected from top to bottom. The storage bin outlet 14 is connected to the top of the high-temperature section heat exchange cylinder 31, and the lower end of the low-temperature section heat exchange cylinder 33 is provided with a heat exchange cylinder outlet 333 with a discharge regulating control valve. The high-temperature section heat exchange cylinder 31 is equipped with a high-temperature heat exchange tube assembly, which includes several spaced-apart serpentine heat exchange oil tube panels 311. Each serpentine heat exchange oil tube panel 311 is vertically arranged, and adjacent serpentine heat exchange oil tube panels 311 form a high-temperature heat exchange channel 312. A high-temperature heat exchange channel inlet temperature sensor and a high-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the high-temperature heat exchange channel 312. An observation window 313 is provided at the upper end of the high-temperature section heat exchange cylinder 31. The observation window 313 can be used to observe the condition of the semi-coke inside the heat exchange cylinder 311. The heat exchange medium in the serpentine heat exchange oil tube panels 311 is heat transfer oil.

[0024] The intermediate-temperature heat exchange cylinder 32 is equipped with an intermediate-temperature heat exchange tube assembly, which includes several spaced-apart serpentine intermediate-temperature water-cooled heat exchange tube panels 321. Each serpentine intermediate-temperature water-cooled heat exchange tube panel 321 is vertically arranged, and an intermediate-temperature heat exchange channel 322 is formed between adjacent serpentine intermediate-temperature water-cooled heat exchange tube panels 321. An inlet temperature sensor and an outlet temperature sensor are respectively installed at the inlet and outlet of the intermediate-temperature heat exchange channel 322. Water is used as the heat exchange medium in the serpentine intermediate-temperature water-cooled heat exchange tube panels 321.

[0025] The low-temperature heat exchange cylinder 33 contains a low-temperature heat exchange tube assembly, which includes several spaced-apart serpentine low-temperature water-cooled heat exchange tube panels 331. Each serpentine low-temperature water-cooled heat exchange tube panel 331 is vertically arranged, and adjacent serpentine low-temperature water-cooled heat exchange tube panels 331 form a low-temperature heat exchange section channel 332. A low-temperature heat exchange channel inlet temperature sensor and a low-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the low-temperature heat exchange channel 332. Water is used as the heat exchange medium in the serpentine low-temperature water-cooled heat exchange tube panels 331.

[0026] Material distribution assemblies are installed inside the heat exchange cylinders 3 above the high-temperature heat exchange channel 312, the medium-temperature heat exchange channel 322, and the low-temperature heat exchange section channel 332. In this embodiment, the material distribution assembly includes several conical material distribution cones 4 whose diameter gradually increases from top to bottom. The upper end of the high-temperature section heat exchange cylinder 31 is a conical cylinder with a diameter that gradually increases from top to bottom. A material distribution cone 4 is installed above the high-temperature heat exchange channel 312. This material distribution cone 4 is located at the upper end of the high-temperature section heat exchange cylinder 31 below the control valve 141 at the outlet 14 of the storage silo. This helps the material to be distributed from top to bottom and from the middle to the outside, so that it can be evenly distributed in the high-temperature heat exchange channel 312. At least two rows of material distribution cones 4 are arranged above the medium-temperature heat exchange channel 322 and above the low-temperature heat exchange section channel 332, with a material discharge gap between adjacent material distribution cones 4. Each row of material distribution cones 4 is evenly distributed at the same height within the heat exchange cylinder 3, with adjacent rows of material distribution cones 4 staggered vertically. The material distribution assembly above the high-temperature heat exchange channel 312, the medium-temperature heat exchange channel 322, and the low-temperature heat exchange section channel 332 serves two purposes: firstly, it ensures that the material is evenly distributed within each heat exchange channel; secondly, under the action of the material distribution cones 4, it enhances the mixing and heat exchange of the material, resulting in more uniform heating of the material.

[0027] In addition, baffles 5 are provided on the outer walls of the heat exchange cylinder 3 above the medium-temperature heat exchange channel 322 and above the low-temperature heat exchange section channel 332, which are arranged from top to bottom and inward.

[0028] The frame 1 is equipped with a feeding device 6, which includes a feeding hopper 61. The feeding hopper 61 can be lowered to pick up materials or raised to feed materials from the first feeding port 11 and the second feeding port 12 under the drive of the electric hoist 62.

[0029] In this embodiment, at least two heat exchange cylinder outlets 333 are provided in the heat exchange cylinder 3. The purpose of providing multiple heat exchange cylinder outlets 333 is to eliminate the dead zone of material falling at the outlet of the heat exchange cylinder 3, so that the semi-coke in each high-temperature heat exchange channel 312, each medium-temperature heat exchange channel 3, and each low-temperature heat exchange section channel 332 in the heat exchange cylinder 3 can fall and be discharged as synchronously and evenly as possible.

[0030] The working principle is as follows: Semi-coke flowability test: Close the discharge regulating control valves on the discharge ports 333 of each heat exchange cylinder, and open the control valve 141 of the discharge port 14 of the storage silo. Cooled semi-coke is added to the storage silo 2 by the feeding device 6 through the first feeding port 11 and the second feeding port 12 until the semi-coke fills the entire heat exchange cylinder 3 and the storage silo 2. Then, open the discharge regulating control valves on all the discharge ports 333 of the heat exchange cylinders. By observing the flow of semi-coke from the discharge ports 333 of the heat exchange cylinders, the flowability of the semi-coke is judged. If the semi-coke is discharged intermittently, it indicates that the semi-coke is in a state of bridging and agglomeration. If the semi-coke is discharged continuously and stably, it indicates that the semi-coke is not in a state of bridging and agglomeration and has good flowability.

[0031] Dynamic heat transfer coefficient test: Close the control valve 141 of the discharge port 14 of the storage silo. First, nitrogen is introduced into the storage silo 1 through the nitrogen input pipe 15. The air in the storage silo 1 is discharged from the exhaust port 13 with a breather valve, and the oxygen content in the storage silo 1 drops to below 2%. Nitrogen forms a protective atmosphere in the storage silo 1. Then, semi-coke is added into the storage silo 2 by the feeding device 6 through the first feeding port 11 and the second feeding port 12 until the storage silo 2 is full. Then, the electric heating components in the storage silo 1 are turned on. The groups of electric heating rods in the storage silo 1 heat the semi-coke. The storage silo temperature sensor at the corresponding position of each group of electric heating rods monitors the temperature of the semi-coke in real time. During the heating process, nitrogen continues to be introduced to maintain a slight positive pressure of 50-200 Pa in the storage silo 1 to ensure that the oxygen generated during the heating process can be discharged from the exhaust port 13. The electric heating rods are set at the top of the storage silo 1 and inside the main body of the storage silo 1 to ensure that the semi-coke is heated evenly. Since each group of electric heating rods is equipped with a storage bin temperature sensor at its corresponding location, if the temperature monitored by the temperature sensor of the storage bin corresponding to a certain group of electric heating rods exceeds the preset temperature, that group of electric heating rods will stop heating. This avoids localized overheating of the semi-coke, ensures uniform heating of the semi-coke, and improves the accuracy of the obtained experimental data. The purpose of heating the semi-coke in storage bin 1 is to simulate the high-temperature semi-coke produced in industries such as metallurgy, chemical industry, and calcium carbide industry, typically heating it to 300-600℃.

[0032] The high-temperature heat exchange tube assembly in the high-temperature section heat exchange cylinder 31 is activated in advance, allowing each serpentine heat transfer oil heat exchange tube panel 311 to operate stably to the preset temperature. The medium-temperature heat exchange tube assembly in the medium-temperature section heat exchange cylinder 32 is activated in advance, allowing the serpentine medium-temperature water-cooled heat exchange tube panel 321 to operate stably to the preset temperature. The low-temperature heat exchange tube assembly in the low-temperature section heat exchange cylinder 33 is activated in advance, allowing the serpentine low-temperature water-cooled heat exchange tube panel 331 to operate stably to the preset temperature. When the semi-coke in the storage silo 1 reaches the preset temperature, the control valve 141 is opened.

[0033] After being heated in the storage silo 1, the semi-coke is controlled by valve 141 and then diffused towards the inner wall of the high-temperature section heat exchange cylinder 31 by the material dispersing assembly below the control valve 141. The heated semi-coke enters the high-temperature heat exchange channel 312 and exchanges heat with the serpentine heat transfer oil heat exchange tube screen 311 at the high-temperature heat exchange channel 312. The temperature sensors at the inlet and outlet of the high-temperature heat exchange channel monitor the temperature of the semi-coke.

[0034] The semi-coke is discharged through the high-temperature heat exchange channel 312 and then passes through the material distribution assembly above the medium-temperature heat exchange channel 322. The material distribution assembly further mixes the semi-coke and ensures that it is evenly distributed throughout the medium-temperature heat exchange channels 322. The semi-coke exchanges heat with the serpentine medium-temperature water-cooled heat exchange tube panel 321 located in the medium-temperature heat exchange channel 322. The inlet temperature sensor and outlet temperature sensor of the medium-temperature heat exchange channel monitor the temperature of the semi-coke, respectively.

[0035] The semi-coke is discharged through the medium-temperature heat exchange channel 322 and then passes through the bulk material assembly above the low-temperature heat exchange channel 332. The bulk material assembly further mixes the semi-coke and ensures that it is evenly distributed throughout the low-temperature heat exchange channels 332. The semi-coke exchanges heat with the serpentine low-temperature water-cooled heat exchange tube panel 331 located in the low-temperature heat exchange channel 332. The inlet temperature sensor and outlet temperature sensor of the low-temperature heat exchange channel monitor the temperature of the semi-coke, respectively.

[0036] The semi-coke in the low-temperature heat exchange channel 332 is discharged through the outlet 333 of the heat exchange cylinder. The discharge rate of the semi-coke at the outlet 333 of the heat exchange cylinder is adjusted by the discharge regulating control valve to observe the temperature changes of the semi-coke at the inlet and outlet of the high-temperature heat exchange channel, the inlet and outlet of the medium-temperature heat exchange channel, and the inlet and outlet of the low-temperature heat exchange channel. Based on the above temperature data, the dynamic thermal conductivity, dynamic heat transfer coefficient, effective heat exchange area, and waste heat recovery efficiency of the semi-coke can be calculated, thus providing strong support for the design of semi-coke waste heat recovery equipment.

[0037] As can be seen from the above, this application provides a semi-coke waste heat recovery test device with a simple structure, capable of performing flowability tests and dynamic heat transfer coefficient tests on semi-coke, thus providing strong support for the design of semi-coke waste heat recovery equipment. The grouped electric heating rods in the storage silo 1 are all independently controlled. Once the temperature monitored by the temperature sensor at the corresponding location exceeds the preset value, heating stops, effectively avoiding excessively high local temperatures and thus improving the accuracy of experimental data. In addition, material distribution components are installed in the heat exchange cylinder 3 above the high-temperature heat exchange channel 312, the medium-temperature heat exchange channel 322, and the low-temperature heat exchange section channel 332. The material distribution components enable the semi-coke to fall evenly into the high-temperature heat exchange channel 312, the medium-temperature heat exchange channel 322, and the low-temperature heat exchange section channel 332, avoiding segregation and accumulation of the semi-coke during the falling process. At the same time, the material passes through the material distribution device, and the material is mixed and heated evenly during the deflection process. This can further improve the accuracy of experimental data and provide reliable experimental basis for the design of semi-coke waste heat recovery equipment and the industrial application of semi-coke waste heat recovery technology.

Claims

1. A waste heat recovery test device for semi-coke, comprising: The frame is characterized in that: a storage bin and a heat exchange cylinder are arranged sequentially from top to bottom on the frame; a feeding port and an exhaust port are provided at the top of the storage bin; and an electric heating component is provided inside the storage bin. The heat exchange cylinder includes a high-temperature section heat exchange cylinder, a medium-temperature section heat exchange cylinder, and a low-temperature section heat exchange cylinder connected sequentially from top to bottom. The discharge port of the storage silo is connected to the top of the high-temperature section heat exchange cylinder. The lower end of the low-temperature section heat exchange cylinder is equipped with a heat exchange cylinder discharge port with a discharge regulating control valve. The discharge port of the storage silo is equipped with a control valve to control the opening and closing of the storage silo discharge port. The high-temperature section heat exchange cylinder is equipped with a high-temperature heat exchange tube assembly, which includes several serpentine heat exchange tube panels arranged at intervals. Each serpentine heat exchange tube panel is arranged vertically, and a high-temperature heat exchange channel is formed between adjacent serpentine heat exchange tube panels. A high-temperature heat exchange channel inlet temperature sensor and a high-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the high-temperature heat exchange channel. The medium-temperature heat exchanger cylinder is equipped with a medium-temperature heat exchanger tube assembly, which includes several serpentine medium-temperature water-cooled heat exchanger tube panels arranged at intervals. Each serpentine medium-temperature water-cooled heat exchanger tube panel is arranged vertically, and a medium-temperature heat exchange channel is formed between adjacent serpentine medium-temperature water-cooled heat exchanger tube panels. A medium-temperature heat exchange channel inlet temperature sensor and a medium-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the medium-temperature heat exchange channel. The low-temperature section heat exchange cylinder is equipped with a low-temperature heat exchange tube assembly, which includes several serpentine low-temperature water-cooled heat exchange tube panels arranged at intervals. Each serpentine low-temperature water-cooled heat exchange tube panel is arranged vertically, and a low-temperature heat exchange section channel is formed between adjacent serpentine low-temperature water-cooled heat exchange tube panels. Low-temperature heat exchange channel inlet temperature sensor and low-temperature heat exchange channel outlet temperature sensor are respectively installed at the inlet and outlet of the low-temperature heat exchange channel. Material distribution components are installed in the heat exchange cylinders above the high-temperature heat exchange channel, above the medium-temperature heat exchange channel, and above the low-temperature heat exchange section channel.

2. The semi-coke waste heat recovery test device according to claim 1, characterized in that: A nitrogen inlet pipe is installed inside the storage silo, and the nitrogen inlet pipe is connected to a nitrogen source outside the storage silo.

3. The semi-coke waste heat recovery test device according to claim 1, characterized in that: The storage silo has a feeding port on each of its top two sides, one of which also serves as an explosion-proof port.

4. The semi-coke waste heat recovery test device according to claim 1, characterized in that: An observation window is provided at the upper end of the heat exchange cylinder in the high-temperature section.

5. The semi-coke waste heat recovery test device according to claim 1, characterized in that: The bulk material assembly includes: several conical bulk material cones with diameters gradually increasing from top to bottom; the upper end of the high-temperature section heat exchange cylinder is a conical cylinder with diameters gradually increasing from top to bottom; a bulk material cone is set above the high-temperature heat exchange channel, and this bulk material cone is set at the upper end of the high-temperature section heat exchange cylinder below the control valve at the outlet of the storage silo; at least two rows of bulk material cones are set above the medium-temperature heat exchange channel and above the low-temperature heat exchange section channel, with a material discharge gap between two adjacent bulk material cones; each row of bulk material cones is evenly distributed at intervals at the same height position inside the heat exchange cylinder, and the upper and lower adjacent rows of bulk material cones are staggered.

6. The semi-coke waste heat recovery test device according to claim 5, characterized in that: Baffles are installed on the outer walls of the heat exchange cylinders of the bulk material assembly above the medium-temperature heat exchange channel and the bulk material assembly above the low-temperature heat exchange section, arranged from top to bottom and inward.

7. The semi-coke waste heat recovery test device according to claim 1, characterized in that: The frame is equipped with a feeding device, which includes a feeding hopper and an electric hoist. The feeding hopper can be lowered to pick up materials or raised to feed materials from the feeding port under the drive of the electric hoist.

8. The semi-coke waste heat recovery test device according to claim 1, characterized in that: The heat exchange cylinder has at least two discharge ports.

9. The semi-coke waste heat recovery test device according to claim 1, characterized in that: The electric heating components inside the storage silo consist of several sets of independently heating electric heating rods. Each set of electric heating rods is equipped with a storage silo temperature sensor. The electric heating rods are evenly distributed on the top of the storage silo and in the main body of the storage silo.

10. The semi-coke waste heat recovery test device according to claim 1, characterized in that: The lower end of the storage silo is cone-shaped, with the diameter gradually decreasing from top to bottom.

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