Lock hopper structure and pulverized coal gasification system

Abstract

The utility model relates to a lock hopper structure and a pulverized coal gasification system, and relates to the technical field of chemical engineering. The lock hopper structure comprises a first lock hopper assembly, a second lock hopper assembly, a first variable-pressure pipeline, a second variable-pressure pipeline and a lock hopper balance pipeline. One end of the lock hopper balance pipeline is communicated with the first lock hopper body, and the other end is communicated with the second lock hopper body; when the first lock hopper body is in a pressure relief state and the second lock hopper body is in a pressurized state, at least part of pressure relief gas released by pressure relief of the first lock hopper body enters the second lock hopper body through the first variable-pressure pipeline; and when the second lock hopper body is in the pressure relief state and the first lock hopper body is in the pressurized state, at least part of pressure relief gas released by pressure relief of the second lock hopper body enters the first lock hopper body through the second variable-pressure pipeline. According to the technical scheme, the problems that in the pressure relief process of an existing lock hopper, the pressure relief gas amount is large, and pressure relief gas cannot be reused can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a lock bucket structure and a pulverized coal gasification system. Background Art

[0002] Pressurized transfer and depressurized discharge of powder are common steps in the entrained-flow dry pulverized coal gasification process. The transfer of powder from high pressure to low pressure or from low pressure to high pressure usually uses a lock hopper.

[0003] The lock bucket is a pressure alternating container. The lock bucket connects the low-pressure container and the high-pressure container at the same time, and completes the transportation of powder between low pressure and high pressure by charging and releasing pressure. Taking the transfer from low pressure to high pressure as an example, the lock bucket realizes the pressurization of powder through the cycle of "collecting material-charging-discharging-pressure relief-collecting material". Each cycle includes a pressure relief process, but the pressure relief gas volume in the pressure relief process is large, and the pressure relief gas cannot be reused, resulting in energy waste and high operating costs. Utility Model Content

[0004] The utility model provides a lock bucket structure and a pulverized coal gasification system, which can solve the problems of large amount of pressure relief gas in the existing lock bucket pressure relief process, and the pressure relief gas cannot be reused, resulting in energy waste and high operating costs.

[0005] In a first aspect, an embodiment of the utility model provides a lock bucket structure, comprising:

[0006] A first lock bucket assembly, comprising a first lock bucket body;

[0007] A second lock bucket assembly, comprising a second lock bucket body;

[0008] A first pressure-changing pipeline, one end of which is connected to the first air outlet of the first locking bucket body, and the other end of which is connected to the second air inlet of the second locking bucket body;

[0009] a second voltage-changing pipeline, one end of which is connected to the second air outlet of the second locking bucket body, and the other end of which is connected to the first air inlet of the first locking bucket body; and

[0010] A lock bucket balance pipeline, one end of which is connected to the first lock bucket body and the other end of which is connected to the second lock bucket body;

[0011] Among them, when the first locking bucket body is in a pressure relief state and the second locking bucket body is in a pressure charging state, the pressure relief gas released by the pressure relief of the first locking bucket body at least partially enters the second locking bucket body through the first pressure transformer pipeline; when the second locking bucket body is in a pressure relief state and the first locking bucket body is in a pressure charging state, the pressure relief gas released by the pressure relief of the second locking bucket body at least partially enters the first locking bucket body through the second pressure transformer pipeline.

[0012] In some embodiments, the lock bucket structure further includes:

[0013] A first valve, arranged on the first pressure-changing pipeline;

[0014] A second valve is disposed on the second voltage-changing pipeline; and

[0015] The lock bucket balancing valve is arranged on the lock bucket balancing pipeline.

[0016] In some embodiments, the lock bucket structure further includes:

[0017] A first flow limiting plate is disposed in the first voltage-changing pipeline, and the first flow limiting plate is located on a side of the first valve away from the first gas outlet; and

[0018] A second flow limiting plate is arranged in the second voltage-changing pipeline, and the second flow limiting plate is located on a side of the second valve away from the second air outlet;

[0019] Wherein, a plurality of flow limiting holes are arranged on the first flow limiting plate and the second flow limiting plate.

[0020] In some embodiments, the lock bucket structure further includes:

[0021] A filter, the filter being connected to the first lock bucket body through a first pressure relief pipeline, and the filter being connected to the second lock bucket body through a second pressure relief pipeline;

[0022] A first pressure relief valve is disposed on the first pressure relief pipeline; and

[0023] The second pressure relief valve is arranged on the second pressure relief pipeline.

[0024] In some embodiments, the lock bucket structure further includes:

[0025] a third flow limiting plate, disposed in the first pressure relief pipeline, the third flow limiting plate being located on a side of the first pressure relief valve away from the first lock bucket body; and

[0026] a fourth flow limiting plate, disposed in the second pressure relief pipeline, the fourth flow limiting plate being located on a side of the second pressure relief valve away from the second lock bucket body;

[0027] Wherein, the third flow limiting plate and the fourth flow limiting plate are both provided with a plurality of flow limiting holes.

[0028] In some embodiments, the lock bucket structure further includes:

[0029] A first low-pressure balancing pipeline, one end of which is connected to the lock bucket body and the other end of which is connected to the filter; and

[0030] A second low-pressure balancing pipeline has one end connected to the lock bucket body and the other end connected to the filter.

[0031] In some embodiments, the lock bucket structure further includes:

[0032] A first low-pressure balancing valve, disposed on the first low-pressure balancing pipeline; and

[0033] The second low-pressure balancing valve is arranged on the second low-pressure balancing pipeline.

[0034] In some embodiments, the first lock bucket assembly further comprises:

[0035] A first low-pressure container is connected to the first lock bucket body through a first delivery pipeline;

[0036] A first high-pressure container is connected to the first lock bucket body through a second delivery pipeline;

[0037] A first delivery valve, disposed on the first delivery pipeline;

[0038] A second delivery valve, disposed on the second delivery pipeline;

[0039] A first pressurizing part, connected to the first lock bucket body through a first pressurizing pipeline; and

[0040] The first pressurizing valve is arranged on the first pressure charging pipeline.

[0041] In some embodiments, the second lock bucket assembly further comprises:

[0042] A second low-pressure container is connected to the second lock bucket body through a third delivery pipeline;

[0043] A second high-pressure container is connected to the first lock bucket body through a fourth delivery pipeline;

[0044] A third delivery valve, arranged on the third delivery pipeline;

[0045] a fourth delivery valve, disposed on the fourth delivery pipeline;

[0046] A second pressurizing part, connected to the second lock bucket body through a second pressurizing pipeline; and

[0047] The second pressurizing valve is arranged on the second pressure charging pipeline.

[0048] In a second aspect, an embodiment of the utility model provides a pulverized coal gasification system, comprising the lock bucket structure as described above.

[0049] Compared with the prior art, the advantages of the embodiments of the present invention are:

[0050] (1) By providing the first pressure-changing pipeline and the second pressure-changing pipeline, the first lock bucket body and the second lock bucket body form an organic whole, and the pressurized state of the first lock bucket body corresponds to the pressure-released state of the second lock bucket body, and the pressure-released state of the first lock bucket body corresponds to the pressurized state of the second lock bucket body. The coupling operation realizes the recycling of the decompressed gas, and the construction cost is low;

[0051] (2) When the first lock bucket body is depressurized, the second lock bucket body is used to recover the depressurized gas of the first lock bucket body, and the recovered depressurized gas is used to pressurize the second lock bucket body; when the second lock bucket body is depressurized, the first lock bucket body is used to recover the depressurized gas of the second lock bucket body, and the recovered depressurized gas is used to pressurize the first lock bucket body, thereby realizing the recycling of the depressurized gas, improving the reuse rate of the gas, effectively saving energy consumption and operating costs, and solving the problem that the existing depressurized gas cannot be reused, resulting in energy waste and high operating costs. At the same time, it also reduces the amount of depressurized gas, thereby reducing the pollution to the environment caused by dust carried in the depressurized gas.

[0052] (3) By providing a lock bucket balancing pipeline to connect the first lock bucket body and the second lock bucket body, the time required for the first lock bucket body and the second lock bucket body to be pressure-equalized can be reduced, and the recycling rate of the gas can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0054] Figure 1 It is a structural schematic diagram of a lock bucket structure provided by an embodiment of the utility model.

[0055] Reference numerals:

[0056] 10. First lock bucket assembly; 110. First lock bucket body; 120. First low-pressure container; 130. First high-pressure container; 140. First delivery valve; 150. Second delivery valve; 160. First pressurizing valve;

[0057] 20, second lock bucket assembly; 210, second lock bucket body; 220, second low-pressure container; 230, second high-pressure container; 240, third delivery valve; 250, fourth delivery valve; 260, second pressurizing valve;

[0058] 30. first voltage-changing pipeline; 310. first valve; 320. first flow-limiting plate;

[0059] 40. A second voltage-changing pipeline; 410. A second valve; 420. A second flow-limiting plate;

[0060] 50. Lock bucket balance pipeline; 510. Lock bucket balance valve;

[0061] 60, filter; 610, first low-pressure balancing pipeline; 620, second low-pressure balancing pipeline; 640, first low-pressure balancing valve; 650, second low-pressure balancing valve;

[0062] 70, first pressure relief pipeline; 710, first pressure relief valve; 720, third flow limiting plate;

[0063] 80. Second pressure relief pipeline; 810. Second pressure relief valve; 820. Fourth flow limiting plate. DETAILED DESCRIPTION

[0064] The utility model will be further described below in conjunction with the accompanying drawings.

[0065] The lock bucket is a pressure alternating container. The lock bucket connects the low-pressure container and the high-pressure container at the same time, and completes the transportation of powder between low pressure and high pressure by charging and releasing pressure. Taking the transfer from low pressure to high pressure as an example, the lock bucket realizes the pressurization of powder through the cycle of "collecting material-charging-discharging-pressure relief-collecting material". Each cycle includes a pressure relief process, but the pressure relief gas volume in the pressure relief process is large, and the pressure relief gas cannot be reused, resulting in energy waste and high operating costs.

[0066] In order to solve the above technical problems, at least one embodiment of the utility model provides a lock bucket structure, including a first lock bucket assembly 10, a second lock bucket assembly 20, a first voltage-changing pipeline 30, a second voltage-changing pipeline 40 and a lock bucket balancing pipeline 50; the first lock bucket assembly 10 includes a first lock bucket body 110; the second lock bucket assembly 20 includes a second lock bucket body 210; one end of the first voltage-changing pipeline 30 is connected to the first air outlet of the first lock bucket body 110, and the other end is connected to the second air inlet of the second lock bucket body 210; one end of the second voltage-changing pipeline 40 is connected to the second air outlet of the second lock bucket body 210, and the other end is connected to the first air inlet of the first lock bucket body 110; one end of the lock bucket balancing pipeline 50 is connected to the first lock bucket body 110, and the other end is connected to the second lock bucket body 210;

[0067] Among them, when the first locking bucket body 110 is in a pressure relief state and the second locking bucket body 210 is in a pressurized state, the pressure relief gas released by the first locking bucket body 110 at least partially enters the second locking bucket body 210 through the first pressure transformer pipeline 30; when the second locking bucket body 210 is in a pressure relief state and the first locking bucket body 110 is in a pressurized state, the pressure relief gas released by the second locking bucket body 210 at least partially enters the first locking bucket body 110 through the second pressure transformer pipeline 40.

[0068] As can be seen from the above, by providing the first pressure-changing pipeline 30 and the second pressure-changing pipeline 40, the first lock bucket body 110 and the second lock bucket body 210 form an organic whole, and the pressurized state of the first lock bucket body 110 corresponds to the pressure-relieved state of the second lock bucket body 210, and the pressure-relieved state of the first lock bucket body 110 corresponds to the pressurized state of the second lock bucket body 210, so as to work in a coupled manner, that is, when the first lock bucket body 110 is depressurized, the second lock bucket body 210 is used to recover the depressurized gas of the first lock bucket body 110, and the recovered depressurized gas is used to recharge the second lock bucket body 210. The lock bucket body 210 is pressurized; when the second lock bucket body 210 is depressurized, the first lock bucket body 110 is used to recover the decompression gas of the second lock bucket body 210, and the recovered decompression gas is used to pressurize the first lock bucket body 110, thereby realizing the recycling of the decompression gas, improving the reuse rate of the gas, effectively saving energy consumption and operating costs, and solving the problem that the existing decompression gas cannot be reused, resulting in energy waste and high operating costs. At the same time, it also reduces the amount of decompression gas, thereby reducing the pollution to the environment caused by dust carried in the decompression gas. In addition, by setting a lock bucket balance pipeline 50 to connect the first lock bucket body 110 and the second lock bucket body 210, it is possible to reduce the time required for the first lock bucket body 110 and the second lock bucket body 210 to equalize the pressure, and improve the recycling rate of the gas.

[0069] It should be noted that the specific structure and working principle of the first locking bucket body 110 and the second locking bucket body 210 are existing technologies and will not be repeated in this application.

[0070] It should also be noted that when the first lock bucket body 110 is in a pressure-relief state, the second lock bucket body 210 is in a pressure-charged state; when the first lock bucket body 110 is in a pressure-relief state, the second lock bucket body 210 is in a pressure-relief state, thereby achieving coupling work.

[0071] like Figure 1 As shown, the lock bucket structure includes a first lock bucket assembly 10, a second lock bucket assembly 20, a first voltage-changing pipeline 30, a second voltage-changing pipeline 40 and a lock bucket balancing pipeline 50; the first lock bucket assembly 10 includes a first lock bucket body 110; the second lock bucket assembly 20 includes a second lock bucket body 210; one end of the first voltage-changing pipeline 30 is connected to the first air outlet of the first lock bucket body 110, and the other end is connected to the second air inlet of the second lock bucket body 210; one end of the second voltage-changing pipeline 40 is connected to the second air outlet of the second lock bucket body 210, and the other end is connected to the first air inlet of the first lock bucket body 110; one end of the lock bucket balancing pipeline 50 is connected to the first lock bucket body 110, and the other end is connected to the second lock bucket body 210;

[0072] Among them, when the first locking bucket body 110 is in a pressure relief state and the second locking bucket body 210 is in a pressurized state, the pressure relief gas released by the first locking bucket body 110 at least partially enters the second locking bucket body 210 through the first pressure transformer pipeline 30; when the second locking bucket body 210 is in a pressure relief state and the first locking bucket body 110 is in a pressurized state, the pressure relief gas released by the second locking bucket body 210 at least partially enters the first locking bucket body 110 through the second pressure transformer pipeline 40.

[0073] As can be seen from the above, by providing the first pressure-changing pipeline 30 and the second pressure-changing pipeline 40, the first lock bucket body 110 and the second lock bucket body 210 form an organic whole, and the pressurized state of the first lock bucket body 110 corresponds to the pressure-relieved state of the second lock bucket body 210, and the pressure-relieved state of the first lock bucket body 110 corresponds to the pressurized state of the second lock bucket body 210, so as to work in a coupled manner, that is, when the first lock bucket body 110 is depressurized, the second lock bucket body 210 is used to recover the depressurized gas of the first lock bucket body 110, and the recovered depressurized gas is used to recharge the second lock bucket body 210. The lock bucket body 210 is pressurized; when the second lock bucket body 210 is depressurized, the first lock bucket body 110 is used to recover the decompression gas of the second lock bucket body 210, and the recovered decompression gas is used to pressurize the first lock bucket body 110, thereby realizing the recycling of the decompression gas, improving the reuse rate of the gas, effectively saving energy consumption and operating costs, and solving the problem that the existing decompression gas cannot be reused, resulting in energy waste and high operating costs. At the same time, it also reduces the amount of decompression gas, thereby reducing the pollution to the environment caused by dust carried in the decompression gas. In addition, by setting a lock bucket balance pipeline 50 to connect the first lock bucket body 110 and the second lock bucket body 210, it is possible to reduce the time required for the first lock bucket body 110 and the second lock bucket body 210 to equalize the pressure, and improve the recycling rate of the gas.

[0074] It should be noted that the specific structure and working principle of the first locking bucket body 110 and the second locking bucket body 210 are existing technologies and will not be repeated in this application.

[0075] It should also be noted that when the first lock bucket body 110 is in a pressure-relief state, the second lock bucket body 210 is in a pressure-charged state; when the first lock bucket body 110 is in a pressure-relief state, the second lock bucket body 210 is in a pressure-relief state, thereby achieving coupling work.

[0076] In some embodiments, the lock bucket structure also includes a first valve 310, a second valve 410 and a lock bucket balancing valve 510; the first valve 310 is arranged on the first transformer pipeline 30; the second valve 410 is arranged on the second transformer pipeline 40; and the lock bucket balancing valve 510 is arranged on the lock bucket balancing pipeline 50.

[0077] By setting the first valve 310, the second valve 410, and the lock bucket balancing valve 510 to respectively control the on and off of the first pressure-changing pipeline 30, the second pressure-changing pipeline 40, and the lock bucket balancing pipeline 50, it is convenient for users to control the working state of the lock bucket structure. By setting the lock bucket balancing valve 510, the lock bucket balancing valve 510 opens when the pressures at the end of mutual charging are close, so that the pressures between the two lock buckets are quickly balanced.

[0078] It should be noted that the first valve 310 and the second valve 410 are both cut-off valves. The cut-off valve is a device for controlling the flow of fluid, which can realize the switching, regulation or cutting of the fluid. The cut-off valve includes a valve body, a valve cover, a valve seat, a valve flap and a valve stem. The movement of the valve flap determines the flow state of the fluid. The working principle of the cut-off valve is the existing technology and will not be repeated in this application.

[0079] It should also be noted that when the first lock bucket body 110 is depressurized, the first valve 310 is opened, and the depressurized gas in the first lock bucket body 110 enters the second lock bucket body 210 until the pressure difference between the first lock bucket body 110 and the second lock bucket body 210 is less than the first preset pressure difference, and the lock bucket balance valve 510 is opened until the pressure difference between the first lock bucket body 110 and the second lock bucket body 210 is less than the second preset pressure difference, and the lock bucket balance valve 510 and the first valve 310 are closed. The first preset pressure difference and the second preset pressure difference are both set according to actual work needs, and the first preset pressure difference is greater than the second preset pressure difference. For example, the first preset pressure difference is 0.5MPa, and the second preset pressure difference is less than 0.1MPa.

[0080] It should also be noted that when the second lock bucket body 210 is depressurized, the second valve 410 is opened, and the depressurized gas in the second lock bucket body 210 enters the first lock bucket body 110 until the pressure difference between the second lock bucket body 210 and the first lock bucket body 110 is less than the third preset pressure difference, and the lock bucket balance valve 510 is opened until the pressure difference between the second lock bucket body 210 and the first lock bucket body 110 is less than the fourth preset pressure difference, and the lock bucket balance valve 510 and the second valve 410 are closed. The third preset pressure difference and the fourth preset pressure difference are both set according to actual work needs, and the third preset pressure difference is greater than the fourth preset pressure difference. For example, the third preset pressure difference is 0.5MPa, and the fourth preset pressure difference is less than 0.1MPa.

[0081] In some embodiments, the lock bucket structure also includes a first flow limiting plate 320 and a second flow limiting plate 420; the first flow limiting plate 320 is arranged in the first transformer pipeline 30, and the first flow limiting plate 320 is located on the side of the first valve 310 away from the first air outlet; the second flow limiting plate 420 is arranged in the second transformer pipeline 40, and the second flow limiting plate 420 is located on the side of the second valve 410 away from the second air outlet; wherein, the first flow limiting plate 320 and the second flow limiting plate 420 are both provided with multiple flow limiting holes.

[0082] By setting the first limiting plate 320 and the second limiting plate 420, the noise and vibration in the pressure relief process can be reduced, and the compaction of powder or excessive noise and vibration caused by too fast filling and releasing pressure can be avoided. At the same time, the first limiting plate 320 and the second limiting plate 420 can avoid excessive flow, and provide a structural basis for controlling the pressure relief rate and achieving orderly pressure relief.

[0083] In some embodiments, the lock bucket structure also includes a filter 60, a first pressure relief valve 710 and a second pressure relief valve 810; the filter 60 is connected to the first lock bucket body 110 through the first pressure relief pipeline 70, and the filter 60 is connected to the second lock bucket body 210 through the second pressure relief pipeline 80; the first pressure relief valve 710 is arranged on the first pressure relief pipeline 70; the second pressure relief valve 810 is arranged on the second pressure relief pipeline 80.

[0084] By setting up a filter 60 to filter the dust particles carried in the decompression gas, the filtered powder returns to the lock bucket body under the action of gravity, and the filtered gas enters the buffer container and the atmosphere to avoid pollution to the environment. It should be noted that the filter 60 is a bag filter, and the specific structure and working principle of the bag filter are all existing technologies, which will not be repeated in this application.

[0085] It should also be noted that when the first locking bucket body 110 is in a pressure relief state, when the pressure difference between the first locking bucket body 110 and the second locking bucket body 210 is less than the second preset pressure difference, the locking bucket balance valve 510 and the first valve 310 are closed; then the first pressure relief valve 710 is opened, and the first locking bucket body 110 continues to relieve pressure, and the depressurized gas in the first locking bucket body 110 is filtered by the filter 60 and discharged into the atmosphere.

[0086] In some embodiments, the lock bucket structure also includes a third flow limiting plate 720 and a fourth flow limiting plate 820; the third flow limiting plate 720 is arranged in the first pressure relief pipeline 70, and the third flow limiting plate 720 is located on the side of the first pressure relief valve 710 away from the first lock bucket body 110; the fourth flow limiting plate 820 is arranged in the second pressure relief pipeline 80, and the fourth flow limiting plate 820 is located on the side of the second pressure relief valve 810 away from the second lock bucket body 210; wherein, the third flow limiting plate 720 and the fourth flow limiting plate 820 are both provided with multiple flow limiting holes.

[0087] By setting the third flow limiting plate 720 and the fourth flow limiting plate 820, the noise and vibration during the pressure relief process can be reduced, and the compaction of powder or excessive noise and vibration caused by too fast pressure relief can be avoided. At the same time, the third flow limiting plate 720 and the fourth flow limiting plate 820 can avoid excessive flow, and provide a structural basis for controlling the pressure relief rate and achieving orderly pressure relief.

[0088] In some embodiments, the lock bucket structure also includes a first low-pressure balancing pipeline 610 and a second low-pressure balancing pipeline 620; one end of the first low-pressure balancing pipeline 610 is connected to the lock bucket body and the other end is connected to the filter 60; one end of the second low-pressure balancing pipeline 620 is connected to the lock bucket body and the other end is connected to the filter 60.

[0089] By respectively setting up a first low-pressure balancing pipeline 610 to connect the first locking bucket body 110 and the filter 60, the time required for the pressure equalization between the first locking bucket body 110 and the filter 60 can be reduced, so that the first locking bucket body 110 can be quickly depressurized; by respectively setting up a second low-pressure balancing pipeline 620 to connect the second locking bucket body 210 and the filter 60, the time required for the pressure equalization between the second locking bucket body 210 and the filter 60 can be reduced, so that the second locking bucket body 210 can be quickly depressurized.

[0090] In some embodiments, the lock bucket structure further includes a first low-pressure balancing valve 640 and a second low-pressure balancing valve 650 ; the first low-pressure balancing valve 640 is disposed on the first low-pressure balancing pipeline 610 ; the second low-pressure balancing valve 650 is disposed on the second low-pressure balancing pipeline 620 .

[0091] By setting a first low-pressure balancing valve 640 and a second low-pressure balancing valve 650, the on-and-off of the first low-pressure balancing pipeline 610 and the second low-pressure balancing pipeline 620 are controlled respectively; by setting the first low-pressure balancing valve 640 to open when the first locking bucket body 110 is depressurized to a first preset low pressure, the pressure of the first locking bucket body 110 and the filter 60 is quickly balanced; by setting the second low-pressure balancing valve 650 to open when the second locking bucket body 210 is depressurized to a second preset low pressure, the pressure of the second locking bucket body 210 and the filter 60 is quickly balanced.

[0092] It should be noted that, when the first pressure relief valve 710 is opened, the first lock bucket body 110 is depressurized, and the depressurized gas in the first lock bucket body 110 is filtered by the filter 60 and discharged to the atmosphere, until the first lock bucket body 110 is depressurized to the first preset low pressure, the first low-pressure balancing valve 640 is opened, and when the pressure relief is completed, the first pressure relief valve 710 and the first low-pressure balancing valve 640 are closed. The first preset low pressure is set according to actual needs.

[0093] It should also be noted that, when the second pressure relief valve 810 is opened, the second lock bucket body 210 is depressurized, and the depressurized gas in the second lock bucket body 210 is filtered by the filter 60 and discharged to the atmosphere, until the second lock bucket body 210 is depressurized to the second preset low pressure, the second low-pressure balancing valve 650 is opened, and when the pressure relief is completed, the second pressure relief valve 810 and the second low-pressure balancing valve 650 are closed. The second preset low pressure is set according to actual needs.

[0094] In some embodiments, the first locking bucket assembly 10 also includes a first low-pressure container 120, a first high-pressure container 130, a first delivery valve 140, a second delivery valve 150, a first pressurizing part and a first pressurizing valve 160; the first low-pressure container 120 is connected to the first locking bucket body 110 through a first delivery pipeline; the first high-pressure container 130 is connected to the first locking bucket body 110 through a second delivery pipeline; the first delivery valve 140 is arranged on the first delivery pipeline; the second delivery valve 150 is arranged on the second delivery pipeline; the first pressurizing part is connected to the first locking bucket body 110 through a first charging pipeline; and the first pressurizing valve 160 is arranged on the first charging pipeline.

[0095] Powder is placed in the first low-pressure container 120 and the first high-pressure container 130. The pressure in the first low-pressure container 120 is lower than the pressure in the first high-pressure container 130. The powder can be transferred between the first low-pressure container 120 and the first high-pressure container 130 by means of the pressure relief and pressure charging of the first lock bucket body 110. The first delivery valve 140 and the second delivery valve 150 are used to control the on-off of the first delivery pipeline and the second delivery pipeline respectively. The first pressurizing part is provided to play a role of supplementary pressurization. When the second lock bucket body 210 is in a pressure relief state and the pressure charging of the first lock bucket body 110 by the second lock bucket body 210 is completed and the pressure in the first lock bucket body 110 has not reached the preset high pressure, the first pressurizing part can be used to continue to pressurize the first lock bucket body 110 until the first preset high pressure is reached and stopped. The on-off of the first pressure charging pipeline is controlled by the first pressure charging valve 160, thereby controlling the pressure charging process of the first lock bucket body 110 by the first pressurizing part.

[0096] It should be noted that the first pressurizing unit is a high-pressure gas source, which can provide high-pressure gas.

[0097] In some embodiments, the second locking bucket assembly 20 also includes a second low-pressure container 220, a second high-pressure container 230, a third delivery valve 240, a fourth delivery valve 250, a second pressurizing part and a second pressurizing valve 260; the second low-pressure container 220 is connected to the second locking bucket body 210 through a third delivery pipeline; the second high-pressure container 230 is connected to the first locking bucket body 110 through a fourth delivery pipeline; the third delivery valve 240 is arranged on the third delivery pipeline; the fourth delivery valve 250 is arranged on the fourth delivery pipeline; the second pressurizing part is connected to the second locking bucket body 210 through a second charging pipeline; and the second pressurizing valve 260 is arranged on the second charging pipeline.

[0098] The powder is placed in the second low-pressure container 220 and the second high-pressure container 230. The pressure in the second low-pressure container 220 is lower than the pressure in the second high-pressure container 230. The powder can be transferred between the second low-pressure container 220 and the second high-pressure container 230 by means of the pressure relief and pressure charging of the second lock bucket body 210. The third delivery pipeline and the fourth delivery pipeline are respectively controlled by the third delivery valve 240 and the fourth delivery valve 250. The second pressurizing part is provided to play a role of supplementary pressurization. When the first lock bucket body 110 is in a pressure relief state, the first lock bucket body 110 pressurizes the second lock bucket body 210. After the pressure is charged, and the pressure in the second lock bucket body 210 has not reached the preset high pressure, the second pressurizing part can be used to continue to pressurize the second lock bucket body 210 until the second preset high pressure is reached and stopped. The second pressurizing valve 260 is provided to control the on-off of the second pressurizing pipeline, thereby controlling the pressurization process of the second lock bucket body 210 by the second pressurizing part.

[0099] It should be noted that the second pressurizing unit is a high-pressure gas source, which can provide high-pressure gas.

[0100] As can be seen from the above, for the first lock bucket body 110 or the second lock bucket body 210, the cycle of collecting materials-pressurizing-discharging materials-depressurizing-collecting materials is still performed, which is called the lock bucket cycle; the first lock bucket body 110 is used as the main body for detailed description below:

[0101] Material collection—the pressure of the first lock bucket body 110 is equivalent to the pressure of the first low-pressure container 120, and all valves are in a closed state, which means that the material collection conditions are met, and the first delivery valve 140 is opened to start material collection; when the material collection time is reached or the material level of the first lock bucket body 110 reaches a preset high level, the material collection is completed, and the first delivery valve 140 is closed; of course, the material collection time and the preset high level are set according to actual needs;

[0102] Pressurization—After the first lock bucket body 110 has finished collecting materials, it is ready for pressurization. Meanwhile, the second lock bucket body 210 is at the end of discharging materials and is ready for pressure relief. The second valve 410 is opened, and the second lock bucket body 210 starts to pressurize the first lock bucket body 110 until the pressure difference between the second lock bucket body 210 and the first lock bucket body 110 is less than the third preset pressure difference. The lock bucket balancing valve 510 is opened until the pressure difference between the second lock bucket body 210 and the first lock bucket body 110 is less than the fourth preset pressure difference. The second valve 410 and the lock bucket balancing valve 510 are closed. If the bucket body 110 does not reach the first preset high pressure, the first pressurizing part and the first pressurizing valve 160 are opened, and the first lock bucket body 110 is continuously pressurized until the pressure of the first lock bucket body 110 reaches the first preset high pressure. After the pressurization is completed, the first pressurizing part and the first pressurizing valve 160 are closed; at the same time, the second pressure relief valve 810 is opened, and the second lock bucket body 210 continues to release pressure. When the pressure is released to the second preset low pressure, the second low-pressure balancing valve 650 is opened. When the pressure release is completed, the second pressure relief valve 810 and the second low-pressure balancing valve 650 are closed; of course, the first preset high pressure is set according to actual needs;

[0103] Discharging—the pressure of the first lock bucket body 110 is equal to the pressure of the first high-pressure container 130, and all valves are in a closed state, which means that the conditions for discharging are met, and the second delivery valve 150 is opened to start discharging; when the discharging time is reached or the material level of the first lock bucket body 110 reaches a preset low level, the discharging is completed, and the second delivery valve 150 is closed; of course, the discharging time and the preset low level are set according to actual needs;

[0104] Pressure relief: the first lock bucket body 110 has finished discharging and has the pressure relief condition, and the second lock bucket body 210 has finished collecting and has the pressure charging condition, the first valve 310 is opened, and the first lock bucket body 110 starts to charge the second lock bucket body 210 until the pressure difference between the first lock bucket body 110 and the second lock bucket body 210 is less than the first preset pressure difference, and the lock bucket balance valve 510 is opened until the pressure difference between the first lock bucket body 110 and the second lock bucket body 210 is less than the second preset pressure difference, and the first valve 310 and the lock bucket balance valve 510 are closed; since the second lock bucket is now If the pressure of the main body 210 does not reach the second preset high pressure, the second pressurizing part and the second pressurizing valve 260 are opened, and the second lock bucket main body 210 is continuously pressurized until the pressure of the second lock bucket main body 210 reaches the second preset high pressure. After the pressurization is completed, the second pressurizing part and the second pressurizing valve 260 are closed; at the same time, the first pressure relief valve 710 is opened, and the first lock bucket main body 110 continues to release pressure. When the pressure is released to the first preset low pressure, the first low-pressure balancing valve 640 is opened. When the pressure release is completed, the first pressure relief valve 710 and the first low-pressure balancing valve 640 are closed; of course, the second preset high pressure is set according to actual needs;

[0105] The first lock bucket body 110 continues to collect materials, completing a lock bucket cycle.

[0106] At least one embodiment of the present invention further provides a pulverized coal gasification system, comprising the lock bucket structure of any embodiment of the present invention, and thus having all the technical effects brought by the technical solutions of the above embodiments.

[0107] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A lock bucket structure, characterized in that: include: A first lock bucket assembly, comprising a first lock bucket body; A second lock bucket assembly, comprising a second lock bucket body; A first pressure-changing pipeline, one end of which is connected to the first air outlet of the first locking bucket body, and the other end of which is connected to the second air inlet of the second locking bucket body; a second voltage-changing pipeline, one end of which is connected to the second air outlet of the second locking bucket body, and the other end of which is connected to the first air inlet of the first locking bucket body; and A lock bucket balance pipeline, one end of which is connected to the first lock bucket body and the other end of which is connected to the second lock bucket body; Among them, when the first locking bucket body is in a pressure relief state and the second locking bucket body is in a pressure charging state, the pressure relief gas released by the pressure relief of the first locking bucket body at least partially enters the second locking bucket body through the first pressure transformer pipeline; when the second locking bucket body is in a pressure relief state and the first locking bucket body is in a pressure charging state, the pressure relief gas released by the pressure relief of the second locking bucket body at least partially enters the first locking bucket body through the second pressure transformer pipeline.

2. The lock bucket structure according to claim 1, characterized in that: The lock bucket structure also includes: A first valve, arranged on the first pressure-changing pipeline; A second valve is disposed on the second voltage-changing pipeline; and The lock bucket balancing valve is arranged on the lock bucket balancing pipeline.

3. The lock bucket structure according to claim 2, characterized in that: The lock bucket structure also includes: A first flow limiting plate is disposed in the first voltage-changing pipeline, and the first flow limiting plate is located on a side of the first valve away from the first gas outlet; and A second flow limiting plate is arranged in the second voltage-changing pipeline, and the second flow limiting plate is located on a side of the second valve away from the second air outlet; Wherein, a plurality of flow limiting holes are arranged on the first flow limiting plate and the second flow limiting plate.

4. The lock bucket structure according to any one of claims 1 to 3, characterized in that: The lock bucket structure also includes: A filter, the filter being connected to the first lock bucket body through a first pressure relief pipeline, and the filter being connected to the second lock bucket body through a second pressure relief pipeline; A first pressure relief valve is disposed on the first pressure relief pipeline; and The second pressure relief valve is arranged on the second pressure relief pipeline.

5. The lock bucket structure according to claim 4, characterized in that: The lock bucket structure also includes: a third flow limiting plate, disposed in the first pressure relief pipeline, the third flow limiting plate being located on a side of the first pressure relief valve away from the first lock bucket body; and a fourth flow limiting plate, disposed in the second pressure relief pipeline, the fourth flow limiting plate being located on a side of the second pressure relief valve away from the second lock bucket body; Wherein, the third flow limiting plate and the fourth flow limiting plate are both provided with a plurality of flow limiting holes.

6. The lock bucket structure according to claim 4, characterized in that: The lock bucket structure also includes: A first low-pressure balancing pipeline, one end of which is connected to the lock bucket body and the other end of which is connected to the filter; and A second low-pressure balancing pipeline has one end connected to the lock bucket body and the other end connected to the filter.

7. The lock bucket structure according to claim 6, characterized in that: The lock bucket structure also includes: A first low-pressure balancing valve, disposed on the first low-pressure balancing pipeline; and The second low-pressure balancing valve is arranged on the second low-pressure balancing pipeline.

8. The lock bucket structure according to any one of claims 1 to 3, characterized in that: The first lock bucket assembly also includes: A first low-pressure container is connected to the first lock bucket body through a first delivery pipeline; A first high-pressure container is connected to the first lock bucket body through a second delivery pipeline; A first delivery valve, disposed on the first delivery pipeline; A second delivery valve, disposed on the second delivery pipeline; A first pressurizing part, connected to the first lock bucket body through a first pressurizing pipeline; and The first pressurizing valve is arranged on the first pressure charging pipeline.

9. The lock bucket structure according to any one of claims 1 to 3, characterized in that: The second lock bucket assembly also includes: A second low-pressure container is connected to the second lock bucket body through a third delivery pipeline; A second high-pressure container is connected to the first lock bucket body through a fourth delivery pipeline; A third delivery valve, arranged on the third delivery pipeline; a fourth delivery valve, disposed on the fourth delivery pipeline; A second pressurizing part, connected to the second lock bucket body through a second pressurizing pipeline; and The second pressurizing valve is arranged on the second pressure charging pipeline.

10. A pulverized coal gasification system, characterized in that: It comprises a lock bucket structure as described in any one of claims 1-9.

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