High-temperature semicoke conveying device

Abstract

The utility model provides a high-temperature semi-coke conveying device. The high-temperature semi-coke conveying device comprises a waste heat boiler, a semi-coke collecting tank, a semi-coke lock hopper, a fly ash lock hopper and hot coke treatment equipment which are sequentially connected in series, the semi-coke lock hopper is connected with the fly ash lock hopper through a check valve, an angle valve, a conveying pipeline and a control valve in sequence; an inflation cone is arranged at the bottom of the semi-coke lock hopper and is connected with a fluidizing gas pipeline; the check valve and the angle valve are connected through a pipeline and a conveying gas pipeline; the semicoke lock hopper is also connected with a pressure stabilizing gas pipeline; the semi-coke lock hopper is also connected with a first filter; the fly ash lock hopper is also respectively connected with a second filter and a replacement gas pipeline; the fly ash lock hopper is also connected with a pressurizing pipeline through a second filter; the angle valve is connected with the protective gas pipeline. The pneumatic conveying device has the advantages of being fast in conveying, small in heat loss and large in unit time handling capacity in a pneumatic conveying mode, and can effectively overcome the defects that due to the adoption of a scraper conveying mode, the conveying speed is low, and use of equipment large in coal demand is difficult to meet.

Description

Technical Field

[0001] This application relates to high-temperature semi-coke conveying technology, and more particularly to a high-temperature semi-coke conveying device. Background Technology

[0002] Because coal contains a large amount of organic matter, such as benzene compounds and phenols, direct combustion as fuel results in insufficient utilization of this organic matter, leading to low coal utilization value. Therefore, fractional utilization can achieve clean and efficient energy use and obtain high-value-added chemical products. Currently, some methods involve pyrolysis (such as coal dry distillation) to separate the organic matter from coal to produce high-value-added chemical products. The main component of the pyrolyzed coal is carbon, which can be used as fuel or as a raw material for syngas production. However, the coke or semi-coke produced after coal pyrolysis still retains a certain amount of heat, posing a challenge to the transportation of this high-temperature pyrolyzed coal.

[0003] Existing methods, such as scraper conveyors, require massive equipment to construct transport channels, and the slow transport speed makes it difficult to meet the needs of equipment used in high-demand coal environments. Utility Model Content

[0004] This application provides a high-temperature semi-coke conveying device to solve the problems in the background art.

[0005] In a first aspect, this application provides a high-temperature semi-coke conveying device, comprising a waste heat boiler, a semi-coke collection tank, a semi-coke lock hopper, a fly ash lock hopper, and a hot coke processing device connected in series.

[0006] The semi-coke lock hopper is connected to the fly ash lock hopper in sequence through a check valve, an angle valve, a conveying pipeline, and a control valve;

[0007] An inflation cone is installed at the bottom of the semi-coke lock hopper, and the inflation cone is connected to the fluidizing gas pipeline;

[0008] The check valve and the angle valve are connected to the gas supply pipeline via a pipe.

[0009] The semi-coke lock hopper is also connected to the pressure stabilizing gas pipeline;

[0010] The semi-coke lock hopper is also connected to the first filter, and the fly ash lock hopper is also connected to the second filter and the replacement gas pipeline respectively; the fly ash lock hopper is also connected to the pressurization pipeline through the second filter.

[0011] The angle valve is connected to the protective gas line.

[0012] The high-temperature semi-coke conveying device of this application, by setting up a semi-coke lock hopper and a fly ash lock hopper connected by a conveying pipeline, uses conveying gas as the conveying medium to transport the semi-coke particles in the semi-coke lock hopper to the fly ash lock hopper by pneumatic conveying, and then unloads them to the hot coke processing equipment. The device of this application, which uses pneumatic conveying, has the characteristics of fast conveying, low heat loss, and large throughput per unit time, and can effectively overcome the disadvantages of using scraper conveying, which is slow and difficult to meet the needs of equipment with large coal demand.

[0013] Optionally, a discharge pipe is provided inside the semi-coke lock hopper. One end of the discharge pipe is located inside the semi-coke lock hopper and close to the air filling cone, while the other end passes through the top of the semi-coke lock hopper and is connected in sequence to the check valve, the angle valve, and the fly ash lock hopper.

[0014] Optionally, a three-way valve is also provided between the angle valve and the fly ash lock hopper;

[0015] The three-way valve is also connected in sequence to the calibration tank, the atmospheric pressure tank, and the hot coke processing equipment;

[0016] The calibration tank is also connected to the second filter via an isolation valve;

[0017] The calibration tank and the atmospheric pressure tank are also connected by a pipeline equipped with a balancing valve;

[0018] The calibration tank is also connected to the replacement gas line.

[0019] Optionally, a third filter is connected to the semi-coke collection tank.

[0020] Optionally, a first level gauge is also installed inside the semi-coke lock hopper;

[0021] A second level gauge is installed inside the fly ash lock hopper;

[0022] The atmospheric pressure tank is connected to the gravity sensor.

[0023] Optionally, the first filter, the second filter, and the third filter are all connected to the combustion furnace.

[0024] Optionally, the conveying pipeline includes, in radial order from the innermost layer to the outermost layer, an inner wear-resistant layer, a rigid support layer, a heat insulation layer, and an outermost protective mesh layer.

[0025] Secondly, this application provides a method for conveying high-temperature semi-coke, comprising the following steps:

[0026] The semi-coke cooled by the waste heat boiler is unloaded into a high-level semi-coke collection tank for collection. The semi-coke collected in the semi-coke collection tank is then unloaded into a semi-coke lock hopper. Fluidizing gas is then blown into the semi-coke lock hopper through a fluidizing gas pipeline to make the semi-coke fluidized in the semi-coke lock hopper.

[0027] When the semi-coke in the semi-coke lock hopper reaches a high level, the pressure is increased to 0.5MPa±0.05MPa below the pressure inside the semi-coke lock hopper through the pressurization pipeline. At the same time, the pressure stabilizing gas pipeline and the conveying gas pipeline are connected, and the semi-coke is conveyed into the fly ash lock hopper according to the preset conveying density and conveying flow rate.

[0028] After the fly ash lock hopper reaches the high material level, the conveying stops. The fly ash lock hopper is depressurized through the second filter, and replacement gas is introduced through the replacement gas pipeline. Then, the fly ash is unloaded into the hot coke processing equipment. After the unloading is completed, the fly ash lock hopper is pressurized through the pressurization pipeline to a pressure lower than the pressure in the half coke lock hopper by 0.5MPa±0.05MPa.

[0029] Optionally, the semi-coke lock hopper also supplies semi-coke to the calibration tank via a switching three-way valve, specifically:

[0030] Switch the three-way valve to connect the semi-coke lock hopper and the calibration tank, and transport the semi-coke in the semi-coke lock hopper to the calibration limit of the calibration tank;

[0031] After passing through the second filter, the calibration tank is supplied with replacement gas through the replacement gas pipeline to cool the semi-coke to 100~150℃. The semi-coke is then unloaded into an atmospheric pressure tank and then transported to the hot coke processing equipment.

[0032] Optionally, the bulk density of the semi-coke is 150~250 kg / m³. 3 The conveying velocity is 7.35~34.8 m / s, and the conveying density is 100~250 kg / m³. 3 . Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of a high-temperature semi-coke conveying device provided in an embodiment of this application;

[0035] Figure 2 A schematic diagram of a high-temperature semi-coke conveying device provided in another embodiment of this application;

[0036] Figure 3 A schematic diagram of a high-temperature semi-coke conveying device provided in yet another embodiment of this application;

[0037] Figure 4 A schematic diagram of a high-temperature semi-coke conveying device provided in another embodiment of this application;

[0038] Figure 5This is a schematic diagram of the cross-sectional structure of a conveying pipeline provided in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Waste heat boiler; 2. Semi-coke collection tank; 3. Semi-coke lock hopper; 4. Fly ash lock hopper; 5. Hot coke processing equipment; 6. Calibration tank; 7. Atmospheric pressure tank; 8. Controller; 10. Fluidizing gas pipeline; 20. Conveying gas pipeline; 21. Third filter; 30. Pressure stabilizing gas pipeline; 31. Inflating cone; 32. Discharge pipe; 33. First level gauge; 40. Protective gas pipeline; 41. Second filter; 42. Second level gauge; 50. Replacement gas pipeline; 60. Pressurization pipeline; 71. Gravity sensor; 100. Angle valve; 101. Control valve; 200. Check valve; 300. Three-way valve; 310. First filter; 400. Isolation valve; 500. Balancing valve; 1000. Conveying pipeline; 1001. Wear-resistant layer; 1002. Rigid support layer; 1003. Insulation layer; 1004. Protective mesh layer. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0042] like Figure 1 As shown, in a first aspect, this application provides a high-temperature semi-coke conveying device, comprising a waste heat boiler 1, a semi-coke collection tank 2, a semi-coke lock hopper 3, a fly ash lock hopper 4, and a hot coke processing device 5 connected in series.

[0043] The semi-coke lock hopper 3 is connected to the fly ash lock hopper 4 in sequence through a check valve 200, an angle valve 100, a conveying pipe 1000, and a control valve 101;

[0044] The bottom of the semi-coke lock hopper 3 is equipped with an air-filling cone 31, which is connected to the fluidizing gas pipeline 10.

[0045] The check valve 200 and the angle valve 100 are connected to the gas supply line 20 via a pipe;

[0046] The semi-coke lock hopper 3 is also connected to the pressure stabilizing gas pipeline 30;

[0047] The semi-coke lock hopper 3 is also connected to the first filter 310, and the fly ash lock hopper 4 is also connected to the second filter 41 and the replacement gas pipeline 50 respectively; the fly ash lock hopper 4 is also connected to the pressurization pipeline 60 through the second filter 41.

[0048] Angle valve 100 is connected to protective gas line 40.

[0049] When the device in this application is in use, the bulk density of the semi-coke corresponding to the test coal type (below 150 kg / m³) is measured after startup. 3 (It is difficult to meet 80% load), calculate the semi-coke processing capacity of semi-coke lock hopper 3 and fly ash lock hopper 4. After pyrolysis, the high-temperature semi-coke is cooled by waste heat boiler 1 (the temperature of the semi-coke after cooling is 310±20℃) and collected in semi-coke collection tank 2. When the material level in the tank reaches a certain height, the high-temperature semi-coke in semi-coke collection tank 2 is unloaded into semi-coke lock hopper 3 set at a higher position. When the material level reaches a certain level, the unloading from semi-coke collection tank 2 to semi-coke lock hopper 3 is stopped. Fluidizing gas is blown into the semi-coke lock hopper 3 through the fluidizing gas pipeline 10, so that the semi-coke is in a fluidized state in the semi-coke lock hopper 3; the fly ash lock hopper 4 is pressurized to 0.5MPa±0.05MPa lower than the pressure in the semi-coke lock hopper 3, and at the same time the pressure stabilizing gas pipeline 30 and the conveying gas pipeline 20 are connected, and the conveying density and conveying velocity are set according to the preset conveying density and conveying velocity (conveying velocity is 7.35~34.8m / s, conveying density is 100~250 kg / m³). 3 Semi-coke is fed into fly ash lock hopper 4. Simultaneously, the continuous input of a stabilizing gas source ensures a stable and continuous output of semi-coke. During the conveying process, the conveying gas supplied by the conveying gas pipeline 20 mixes with the fluidized material entering the pipeline, stabilizing the conveying process of the semi-coke. The conveyed semi-coke enters fly ash lock hopper 4, and the material level in fly ash lock hopper 4 is monitored. When the material level reaches the preset high level, the feeding of semi-coke into fly ash lock hopper 4 is stopped.

[0050] When the fly ash lock hopper 4 is at a high level, it is depressurized through the second filter 41. After depressurization, replacement gas is introduced into the fly ash lock hopper 4 through the replacement gas pipeline 50 to replace the conveying gas in the fly ash lock hopper 4 with the pressure before depressurization. After the replacement gas is applied, the fly ash lock hopper 4 discharges the semi-coke to the hot coke processing equipment 5 for use (e.g., for cooling). After unloading, the fly ash lock hopper 4 is pressurized through the pressurization pipeline 60 to a pressure 0.5MPa ± 0.05MPa lower than the pressure in the semi-coke lock hopper 3. When the pressurization pipeline 60 pressurizes the fly ash lock hopper 4 through the second filter 41, it is equivalent to backflushing the second filter 41, thereby cleaning the second filter 41 and extending its service life.

[0051] The high-temperature semi-coke conveying device of this application, by setting up a semi-coke lock hopper 3 and a fly ash lock hopper 4 connected by a conveying pipeline 1000, uses conveying gas as the conveying medium to transport the semi-coke particles in the semi-coke lock hopper 3 to the fly ash lock hopper 4 by pneumatic conveying, and then unloads them to the coal-using equipment. The device of this application, which uses pneumatic conveying, has the characteristics of fast conveying, low heat loss, and large throughput per unit time, and can effectively overcome the disadvantages of slow conveying speed and difficulty in meeting the needs of equipment with large coal demand caused by scraper conveying.

[0052] like Figure 1 As shown, optionally, a discharge pipe 32 is provided inside the semi-coke lock hopper 3. One end of the discharge pipe 32 is located inside the semi-coke lock hopper 3 and close to the air filling cone 31, and the other end passes through the top of the semi-coke lock hopper 3 and is connected in sequence to the check valve 200, the angle valve 100 and the fly ash lock hopper 4.

[0053] In this application, during use, the discharge pipe 32 is close to the aeration cone 31, so the fluidized semi-coke enters the discharge pipe 32. Simultaneously, due to the continuous input of the stabilizing gas source, the semi-coke is ensured to continuously and stably enter the discharge pipe 32. During the conveying process, the conveying gas supplied by the conveying gas pipeline 20 mixes with the fluidized material entering the pipeline, stabilizing the conveying process of the semi-coke.

[0054] like Figure 2 and Figure 3 As shown, optionally, a three-way valve 300 is also provided between the angle valve 100 and the fly ash lock hopper 4;

[0055] The three-way valve 300 is also connected in sequence to the calibration tank 6, the atmospheric pressure tank 7 and the hot coke processing equipment 5;

[0056] Calibration tank 6 is also connected to the second filter 41 via isolation valve 400;

[0057] The calibration tank 6 and the atmospheric pressure tank 7 are also connected by a pipe equipped with a balancing valve 500;

[0058] The calibration tank 6 is also connected to the replacement gas line 50.

[0059] In this application, when it is necessary to calibrate the weight of the semi-coke in the fluidized state, or when the semi-coke conveying is under low load, the state of the semi-coke lock hopper 3 and the calibration tank 6 can be switched by switching the state of the three-way valve 300. The semi-coke is conveyed to the calibration limit in the calibration tank 6 (or a corresponding level gauge is also installed in the calibration tank 6 to detect the level). The feeding into the calibration tank 6 is stopped. After depressurization through the second filter 41, the displacement gas is introduced through the displacement gas pipeline 50 to cool the semi-coke to 100~150℃ and unload it into the atmospheric pressure tank 7. When it is necessary to calibrate the density of the semi-coke in the fluidized state output by the semi-coke lock hopper 3, the semi-coke in the atmospheric pressure tank 7 is weighed and then conveyed to the hot coke processing equipment 5.

[0060] During use, to prevent the semi-coke carried up by the fly ash lock hopper 4 when it is depressurized from entering the calibration tank 6 and causing inaccurate calibration values, the isolation valve 400 between the calibration tank 6 and the second filter 41 can be closed.

[0061] like Figure 2 As shown, optionally, the semi-coke collection tank 2 is connected to the third filter 21.

[0062] In this application, the semi-coke collection tank 2 is connected to the third filter 21, which allows the gas in the semi-coke collection tank 2 to be filtered and discharged, preventing dust in the gas from polluting the environment. The first filter 310, the second filter 41, and the third filter 21 in this application all use filter elements as the filter medium. The filter element can be made of cotton cloth or high-temperature resistant polymer material, and the pore size of the filter medium is 0.01~0.2mm, or a suitable pore size can be selected according to specific production conditions.

[0063] like Figure 3 As shown, optionally, a first material level gauge 33 is also provided inside the semi-coke lock hopper 3;

[0064] A second level gauge 42 is installed inside the fly ash lock hopper 4;

[0065] The atmospheric pressure tank 7 is connected to the gravity sensor 71.

[0066] In this application, level gauges are installed to monitor the level of semi-coke in each container in real time, facilitating timely operation. When it is necessary to calibrate the density of the fluidized semi-coke output from the semi-coke lock hopper 3, the weight can be measured by a gravity sensor 71 to measure the amount of semi-coke being conveyed. In one possible implementation, the first level gauge 33, the second level gauge 42, and the gravity sensor 71 are all electrically connected to a controller, which monitors the level of each container in real time, allowing operators to promptly control the operation of the equipment.

[0067] like Figure 4 As shown, optionally, the first filter 310, the second filter 41 and the third filter 21 are all connected to the combustion furnace 8.

[0068] In this application, the gas discharged after being filtered by the above-mentioned filter may also contain gases generated during the pyrolysis process. Therefore, the combustion furnace 8 is provided to burn these gases for harmless treatment.

[0069] like Figure 5 As shown, optionally, the conveying pipeline 1000 includes, in the radial direction from the inner layer to the outer layer, an inner wear-resistant layer 1001, a rigid support layer 1002, a heat insulation layer 1003, and an outermost protective mesh layer 1004.

[0070] In this application, the wear-resistant layer 1001 can be made of metals such as tungsten steel, manganese steel, and nickel-chromium alloy, or non-metallic materials such as silicon carbide ceramics. The rigid support layer 1002, i.e., the pipe body, can be made of materials such as stainless steel and cast iron; the heat insulation layer 1003 is, for example, made of rock wool. The protective net layer 1004 is laid out using a protective net with legs. The legs are evenly arranged along the outer periphery of the heat insulation layer 1003, with one end abutting against the outer surface of the heat insulation layer 1003 and the other end connected to the protective net to support it (the protective net can be woven from existing materials, such as metal), so that a certain space is left between the protective net layer 1004 and the heat insulation layer 1003, which serves to buffer and expand the protection range.

[0071] A high-temperature semi-coke conveying device, the working process of which is as follows:

[0072] During normal load transportation, the semi-coke bulk density of the tested coal type (below 150 kg / m³) is measured after startup. 3 (It is difficult to meet 80% load), calculate the semi-coke processing capacity of semi-coke lock hopper 3 and fly ash lock hopper 4. After pyrolysis, the high-temperature semi-coke is cooled by waste heat boiler 1 (the temperature of the semi-coke after cooling is 310±20℃) and collected in semi-coke collection tank 2. When the material level in the tank reaches a certain height, the high-temperature semi-coke in semi-coke collection tank 2 is unloaded into semi-coke lock hopper 3 at a high level. When a certain material level is reached, the first material level gauge 33 installed in semi-coke lock hopper 3 can monitor the semi-coke material level in semi-coke lock hopper 3 in real time. When the preset high material level is reached, the unloading from semi-coke collection tank 2 to semi-coke lock hopper 3 is stopped. Fluidizing gas is pumped into the semi-coke lock hopper 3 through the fluidizing gas pipeline 10, causing the semi-coke to be in a fluidized state within the lock hopper 3. The fly ash lock hopper 4 is pressurized through the pressurization pipeline 60 to a pressure 0.5 MPa ± 0.05 MPa lower than the pressure inside the semi-coke lock hopper 3. Simultaneously, the pressure stabilizing gas pipeline 30 and the conveying gas pipeline 20 are connected, and the conveying gas is transported according to a preset conveying density and flow rate (the gas used for pressure stabilizing gas, fluidizing gas, and conveying gas is coal gas synthesis gas, with a conveying flow rate of 7.35~34.8 m / s and a conveying density of 100~250 kg / m³). 3Semi-coke is fed into the fly ash lock hopper 4. Since the discharge pipe 32 is close to the aeration cone 31, the fluidized semi-coke enters the discharge pipe 32. Simultaneously, the continuous input of the stabilizing gas source ensures a stable and continuous flow of semi-coke into the discharge pipe 32. During the conveying process, the conveying gas supplied by the conveying gas pipeline 20 mixes with the fluidized material entering the pipeline, stabilizing the conveying process of the semi-coke. Furthermore, the heat insulation layer 1003 in the conveying pipeline 1000 effectively keeps the semi-coke warm during the conveying process. The conveyed semi-coke enters the fly ash lock hopper 4 through the three-way valve 300, and the material level in the fly ash lock hopper 4 is monitored in real time by the second level gauge 42. When the material level reaches the preset high level, the feeding of semi-coke into the fly ash lock hopper 4 is stopped (this can be achieved by switching the three-way valve 300 or closing the inlet of the fly ash lock hopper 4 or the corresponding valve on the conveying pipeline 1000).

[0073] At this point, the fly ash lock hopper 4 is at a high material level. The fly ash lock hopper 4 is depressurized through the second filter 41 (to prevent semi-coke carried up during depressurization from entering the calibration tank 6 and causing inaccurate calibration values, the isolation valve 400 between the calibration tank 6 and the second filter 41 can be closed). After depressurization, replacement gas (nitrogen) is introduced into the fly ash lock hopper 4 through the replacement gas pipeline 50 and the second filter 41 to avoid safety hazards caused by syngas leakage during unloading). This replaces the conveying gas in the fly ash lock hopper 4 with the pressure before depressurization. After the replacement gas is applied, the semi-coke is unloaded from the fly ash lock hopper 4. After unloading is completed in the hot coke processing equipment 5 (e.g., a cooling device), the fly ash lock hopper 4 is pressurized through the pressurization pipeline 60 (the pressurized gas is coal gas synthesis gas, which discharges the replacement gas, i.e., nitrogen, from the fly ash lock hopper 4 to prevent nitrogen from entering the pipeline and causing the synthesis gas purity to be too low) to a pressure less than 0.5MPa±0.05MPa in the semi-coke lock hopper 3. When the pressurization pipeline 60 pressurizes the fly ash lock hopper 4 through the second filter 41, it is equivalent to backflushing the second filter 41, thereby cleaning the second filter 41 and extending its service life.

[0074] When it is necessary to calibrate the weight of the fluidized semi-coke being conveyed, or when the semi-coke conveying is under low load, the state of the semi-coke lock hopper 3 and the calibration tank 6 can be switched by switching the three-way valve 300. The semi-coke is conveyed to the calibration limit in the calibration tank 6 (or a corresponding level gauge is also installed in the calibration tank 6 to detect the level), the conveying to the calibration tank 6 is stopped, and after depressurization through the second filter 41, replacement gas is introduced through the replacement gas pipeline 50 to cool the semi-coke to 100~150℃, and it is unloaded into the atmospheric pressure tank 7. When it is necessary to calibrate the density of the fluidized semi-coke output from the semi-coke lock hopper 3, it is weighed by the gravity sensor 71 and then conveyed to the hot coke processing equipment 5. In the above process, the conveying flow rate of the semi-coke is controlled at 6.65~6.67t / h.

[0075] Secondly, this application provides a method for conveying high-temperature semi-coke, comprising the following steps:

[0076] The semi-coke cooled by the waste heat boiler 1 is unloaded into the high-level semi-coke collection tank 2 and collected. The semi-coke collected in the semi-coke collection tank 2 is unloaded into the semi-coke lock hopper 3, and fluidizing gas is blown into the semi-coke lock hopper 3 through the fluidizing gas pipeline 10 so that the semi-coke is in a fluidized state in the semi-coke lock hopper 3.

[0077] When the semi-coke in the semi-coke lock hopper 3 reaches a high level, it is pressurized into the fly ash lock hopper 4 through the pressurization pipeline 60 to a pressure 0.5MPa±0.05MPa lower than that in the semi-coke lock hopper 3. At the same time, the pressure stabilizing gas pipeline 30 and the conveying gas pipeline 20 are connected, and the semi-coke is conveyed into the fly ash lock hopper 4 according to the preset conveying density and conveying flow rate.

[0078] After the fly ash lock hopper 4 reaches the high material level, the conveying stops. The fly ash lock hopper 4 is depressurized through the second filter 41, and replacement gas is introduced through the replacement gas pipeline 50. Then, the fly ash lock hopper 4 is unloaded into the hot coke processing equipment 5. After the unloading is completed, the fly ash lock hopper 4 is pressurized through the pressurization pipeline 60 to a pressure lower than that in the half coke lock hopper 3 by 0.5MPa±0.05MPa.

[0079] In this application, the stabilizing gas, fluidizing gas, and conveying gas can be selected from syngas, and the conveying gas can be heated by a corresponding heating device or heat exchange equipment before being fed into the pipeline for conveying semi-coke.

[0080] Optionally, the semi-coke lock hopper 3 also supplies semi-coke to the calibration tank 6 via a switching three-way valve 300, specifically as follows:

[0081] Switch the three-way valve 300 to connect the semi-coke lock hopper 3 and the calibration tank 6, and transport the semi-coke in the semi-coke lock hopper 3 to the calibration tank 6 to the calibration limit of the calibration tank 6;

[0082] After the calibration tank 6 is depressurized through the second filter 41, replacement gas is introduced through the replacement gas pipeline 50 to cool the semi-coke to 100~150℃, and then unloaded into the atmospheric pressure tank 7 and transported to the hot coke processing equipment 5.

[0083] Optionally, the bulk density of the semi-coke is 150~250 kg / m³. 3 The conveying velocity is 7.35~34.8 m / s, and the conveying density is 100~250 kg / m³. 3 .

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-temperature semi-coke conveying device, comprising a waste heat boiler (1), a semi-coke collection tank (2), a semi-coke lock hopper (3), a fly ash lock hopper (4), and a hot coke processing device (5) connected in series. The semi-coke lock hopper (3) is connected to the fly ash lock hopper (4) in sequence through a check valve (200), an angle valve (100), a conveying pipe (1000), and a control valve (101); The bottom of the semi-coke lock hopper (3) is provided with an air-filling cone (31), which is connected to the fluidizing gas pipeline (10); The check valve (200) and the angle valve (100) are connected to the gas delivery pipeline (20) via a pipe; The semi-coke lock hopper (3) is also connected to the pressure stabilizing gas pipeline (30); The semi-coke lock hopper (3) is also connected to the first filter (310), and the fly ash lock hopper (4) is also connected to the second filter (41) and the replacement gas pipeline (50) respectively; the fly ash lock hopper (4) is also connected to the pressurization pipeline (60) through the second filter (41); The angle valve (100) is connected to the protective gas line (40).

2. The high-temperature semi-coke conveying device according to claim 1, characterized in that, The semi-coke lock hopper (3) is provided with a discharge pipe (32). One end of the discharge pipe (32) is located inside the semi-coke lock hopper (3) and close to the air filling cone (31). The other end passes through the top of the semi-coke lock hopper (3) and is connected in sequence to the check valve (200), the angle valve (100) and the fly ash lock hopper (4).

3. The high-temperature semi-coke conveying device according to claim 1, characterized in that, A three-way valve (300) is also provided between the angle valve (100) and the fly ash lock hopper (4). The three-way valve (300) is also connected in sequence to the calibration tank (6), the atmospheric pressure tank (7), and the hot coke processing equipment (5); The calibration tank (6) is also connected to the second filter (41) via an isolation valve (400); The calibration tank (6) and the atmospheric pressure tank (7) are also connected by a pipe equipped with a balancing valve (500); The calibration tank (6) is also connected to the displacement gas line (50).

4. The high-temperature semi-coke conveying device according to claim 1, characterized in that, The semi-coke collection tank (2) is also connected to a third filter (21).

5. The high-temperature semi-coke conveying device according to claim 3, characterized in that, The semi-coke lock hopper (3) is also equipped with a first material level gauge (33); The fly ash lock hopper (4) is equipped with a second level gauge (42); The atmospheric pressure tank (7) is connected to the gravity sensor (71).

6. The high-temperature semi-coke conveying device according to claim 4, characterized in that, The first filter (310), the second filter (41) and the third filter (21) are all connected to the combustion furnace (8).

7. The high-temperature semi-coke conveying device according to claim 1, characterized in that, The conveying pipeline (1000) includes, in radial order from the inner layer to the outer layer, an inner wear-resistant layer (1001), a rigid support layer (1002), a heat insulation layer (1003), and an outermost protective mesh layer (1004).

Images