Pneumatic ash conveying system

Abstract

The utility model provides a pneumatic ash conveying system. The pneumatic ash conveying system comprises a first ash conveying pipeline, a second ash conveying pipeline, a first ash storage module, a second ash storage module, an air storage tank, a controller, a first air valve, a second air valve, an ash silo and a desulfurizing tower, one end of the first ash conveying pipeline is connected with the air storage tank, the other end of the first ash conveying pipeline is connected with the ash silo, the first air valve and the first ash storage module are sequentially connected in the flowing direction of the first ash conveying pipeline, and ash in the first ash storage module can be conveyed to the ash silo according to the air pressure difference in the first ash conveying pipeline; one end of the second ash conveying pipeline is connected with the air storage tank, the other end of the second ash conveying pipeline is connected with the desulfurization tower, and the second ash conveying pipeline is sequentially connected with a second air valve and a second ash storage module in the circulation direction, so that ash in the second ash storage module can be conveyed to the desulfurization tower according to the air pressure difference in the second ash conveying pipeline; the first ash storage module, the second ash storage module, the first air valve and the second air valve are all electrically connected with the controller; the ash conveying device is high in ash conveying efficiency and can cope with continuous and stable ash conveying.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature flue gas purification, and particularly to a pneumatic ash conveying system. Background Art

[0002] The desulfurization tower for dry desulfurization has a low utilization rate of the added desulfurizing agent, and part of the desulfurizing agent is collected in subsequent equipment. To improve the desulfurization efficiency and the utilization rate of the desulfurizing agent, it is necessary to return part of the collected ash to the desulfurization tower.

[0003] The current ash conveying systems are often single ash conveying. If the ash volume surges, it is easy to cause ash accumulation in the entire ash conveying system, resulting in low ash conveying efficiency and inability to handle large-scale ash volume and continuous and uniform feeding back to the desulfurization tower. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a pneumatic ash conveying system with high ash conveying efficiency, which can handle continuous and stable ash volume conveying and continuous and uniform feeding back to the desulfurization tower.

[0005] The utility model provides a pneumatic ash conveying system, including: a first ash conveying pipeline, a second ash conveying pipeline, a first ash storage module, a second ash storage module, an air storage tank, a controller, a first air valve, a second air valve, an ash silo and a desulfurization tower;

[0006] One end of the first ash conveying pipeline is connected to the air storage tank, and the other end is connected to the ash silo. And in the flow direction of the first ash conveying pipeline, the first air valve and the first ash storage module are sequentially connected, so that the ash in the first ash storage module can be conveyed to the ash silo according to the air pressure difference in the first ash conveying pipeline;

[0007] One end of the second ash conveying pipeline is connected to the air storage tank, and the other end is connected to the desulfurization tower. And in the flow direction of the second ash conveying pipeline, the second air valve and the second ash storage module are sequentially connected, so that the ash in the second ash storage module can be conveyed to the desulfurization tower according to the air pressure difference in the second ash conveying pipeline;

[0008] The first ash storage module, the second ash storage module, the first air valve and the second air valve are all electrically connected to the controller.

[0009] Compared with the prior art, the present application has the following advantages: When the dust collector collects ash, the ash will be stored in the first ash storage module and the second ash storage module. When ash conveying is required, only the first air valve and the second air valve need to be opened, and through the air source of the air storage tank, the air pressure difference in the first ash conveying pipeline and the second ash conveying pipeline is changed. In this way, the ash in the first ash storage module can be conveyed to the ash silo according to the air pressure difference in the first ash conveying pipeline, and at the same time, the ash in the second ash storage module can be conveyed to the desulfurization tower according to the air pressure difference in the second ash conveying pipeline. Parallel conveying can be carried out, with high ash conveying efficiency and the ability to handle continuous and stable ash volume conveying.

[0010] In a possible implementation manner, a first switching valve is connected to one side of the first ash conveying pipeline close to the ash silo in the flow direction; a second switching valve is connected to one side of the second ash conveying pipeline close to the desulfurization tower in the flow direction; both the first switching valve and the second switching valve are electrically connected to a controller.

[0011] Compared with the prior art, adopting the above technical solution can respectively conduct or cut off the first ash conveying pipeline and the second ash conveying pipeline through the first switching valve and the second switching valve according to actual needs, making the ash conveying more intelligent and automated.

[0012] In a possible implementation manner, it further includes a first ash conveying branch and a second ash conveying branch;

[0013] One end of the first ash conveying branch is connected to the desulfurization tower, the other end is connected to the first ash conveying pipeline, and a third switching valve is connected in the flow direction of the first ash conveying branch;

[0014] One end of the second ash conveying branch is connected to the ash silo, the other end is connected to the second ash conveying pipeline, and a fourth switching valve is connected in the flow direction of the second ash conveying branch;

[0015] Both the third switching valve and the fourth switching valve are electrically connected to the controller.

[0016] Compared with the prior art, adopting the above technical solution can enable the ash in both the first ash storage module and the second ash storage module to enter the desulfurization tower or the ash silo, and cross ash conveying can be realized, with higher efficiency.

[0017] In a possible implementation manner, it further includes a first air supply pipeline, a second air supply pipeline, a first air supply valve, and a second air supply valve;

[0018] Both ends of the first air supply pipeline are respectively connected to both sides of the first ash conveying pipeline in the flow direction, and a first air supply valve is connected in the flow direction of the first air supply pipeline;

[0019] Both ends of the second air supply pipeline are respectively connected to both sides of the second ash conveying pipeline in the flow direction, and a second air supply valve is connected in the flow direction of the second air supply pipeline;

[0020] Both the first air supply valve and the second air supply valve are electrically connected to the controller.

[0021] Compared with the prior art, adopting the above technical solution can supply air, making the pressure difference larger, preventing blockage and ash accumulation, and improving the ash conveying efficiency.

[0022] In a possible implementation manner, pressure transmitters are connected to both the first ash conveying pipeline and the second ash conveying pipeline in the flow direction, and the pressure transmitters are electrically connected to the controller.

[0023] Compared with the prior art, adopting the above technical solution can effectively detect the pressure inside the pipe, making the whole system more intelligent and more convenient for observing the air pressure and judging the operation condition.

[0024] In a possible implementation manner, the first ash storage module includes one ash storage unit, and the second ash storage module includes two ash storage units; each ash storage unit includes a hopper, a feed valve, a silo pump, a discharge valve, a fluidization pipeline and a fluidization valve; the discharge end of the hopper is connected to the feed end of the silo pump, the feed valve is connected between the hopper and the silo pump, and the discharge valve is connected to the discharge end of the silo pump; and the discharge valve is connected to the first ash conveying pipeline or the second ash conveying pipeline; one end of the fluidization pipeline is connected to the silo pump, and the other end is connected to the first ash conveying pipeline or the second ash conveying pipeline; the feed valve, the discharge valve and the fluidization valve are all electrically connected to the controller.

[0025] Compared with the prior art, adopting the above technical solution can effectively store the ash collected by the dust collector into the silo pump through the hopper and opening the feed valve. The fluidization valve can control and improve the state of the powdery or granular material during the flowing process to ensure the smooth flow and precise control of the material, so that the ash in the silo pump can effectively enter the first ash conveying pipeline or the second ash conveying pipeline by opening the discharge valve.

[0026] In a possible implementation manner, each ash storage unit further includes a manual valve, an expansion joint, a silo pump pressure transmitter, a level switch, a balance pipeline and a balance valve; the manual valve, the expansion joint and the feed valve are arranged in sequence along the direction from the discharge end of the hopper to the feed hopper of the silo pump; the silo pump pressure transmitter and the level switch are both connected to the silo pump; one end of the balance pipeline is connected to the hopper, the other end is connected to the silo pump, and the balance valve is connected in the flow direction of the balance pipeline; the silo pump pressure transmitter, the level switch and the balance valve are all electrically connected to the controller.

[0027] Compared with the prior art, adopting the above technical solution can make the manual valve normally open and close it when maintenance is needed. The expansion joint is used to deal with high-temperature flue gas to prevent damage to the system caused by thermal expansion and contraction, making the ash storage of the ash storage unit safer and ensuring the stability of its internal pressure.

[0028] In a possible implementation manner, a gas filter pressure reducer is further connected to the air outlet end of the gas storage tank, and the gas filter pressure reducer is electrically connected to the controller.

[0029] Compared with the prior art, adopting the above technical solution can effectively ensure the quality of air compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the present utility model;

[0031] Figure 2 It is a schematic diagram of another embodiment of the present utility model;

[0032] Figure 3 Schematic diagram of the ash storage unit of the present utility model;

[0033] Explanation of reference numerals:

[0034] 1 - First ash conveying pipeline, 1.1 First switching valve, 2 - Second ash conveying pipeline, 3 - First ash storage module, 4 - Second ash storage module, 4.1 - Ash hopper, 4.2 - Feed valve, 4.3 - Silo pump, 4.4 - Discharge valve, 4.5 - Fluidization pipeline, 4.6 - Fluidization valve, 4.7 - Manual valve, 4.8 - Expansion joint, 4.9 - Silo pump pressure transmitter, 4.10 - Level switch, 4.11 - Balance pipeline, 4.12 - Balance valve, 4.13 - Branch fluidization valve, 4.14 - Fluidization branch, 5 - Gas storage tank, 6 - Controller, 7 - First gas valve, 8 - Second gas valve, 9 - First ash conveying branch, 10 - Second ash conveying branch, 11 - First air supply pipeline, 12 - Second air supply pipeline, 13 - First air supply valve, 14 - Second air supply valve, 15 - Pressure transmitter, 1 - 1 - Ash silo, 1 - 2 - Desulfurization tower, 21 - Second switching valve, 51 - Gas filter pressure reducer, 61 - Control unit, 91 - Third switching valve, 101 - Fourth switching valve. Detailed implementation manners

[0035] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0036] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0037] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that all valves mentioned below are solenoid valves, aiming to be electrically connected to the controller 6 for automatic control. The controller 6 is a PLC controller. The dashed lines in the attached Figure 1 indicate the electrical connection relationship. The dashed lines in the attached Figure 2 indicate the second ash storage module 4 selected by the frame. Since the dashed lines in the attached Figure 1 indicate the electrical connection relationship. The attached Figure 1 For clarity, the second ash storage module 4 is not shown selected by the frame.

[0039] Refer to Figure 2 , an embodiment of the present application discloses a pneumatic ash conveying system, including: a first ash conveying pipeline 1, a second ash conveying pipeline 2, a first ash storage module 3, a second ash storage module 4, an air storage tank 5, a controller 6, a first air valve 7, a second air valve 8, an ash silo 1-1, and a desulfurization tower 1-2;

[0040] One end of the first ash conveying pipeline 1 is connected to the air storage tank 5, and the other end is connected to the ash silo 1-1. And in the flow direction of the first ash conveying pipeline 1, the first air valve 7 and the first ash storage module 3 are sequentially connected, so that the ash in the first ash storage module 3 can be conveyed to the ash silo 1-1 according to the air pressure difference in the first ash conveying pipeline 1;

[0041] One end of the second ash conveying pipeline 2 is connected to the air storage tank 5, and the other end is connected to the desulfurization tower 1-2. And in the flow direction of the second ash conveying pipeline 2, the second air valve 8 and the second ash storage module 4 are sequentially connected, so that the ash in the second ash storage module 4 can be conveyed to the desulfurization tower 1-2 according to the air pressure difference in the second ash conveying pipeline 2;

[0042] The first ash storage module 3, the second ash storage module 4, the first air valve 7, and the second air valve 8 are all electrically connected to the controller 6.

[0043] In this embodiment, both the first ash storage module 3 and the second ash storage module 4 are used to store ash. When the dust collector collects ash, the ash will be stored in the first ash storage module 3 and the second ash storage module 4; when ash conveying is required, only the first air valve 7 and the second air valve 8 need to be opened, and through the air source of the air storage tank 5, the air pressure difference in the first ash conveying pipeline 1 and the second ash conveying pipeline 2 can be changed. In this way, the ash in the first ash storage module 3 can be conveyed to the ash silo 1-1 according to the air pressure difference in the first ash conveying pipeline 1, and at the same time, the ash in the second ash storage module 4 can be conveyed to the desulfurization tower 1-2 according to the air pressure difference in the second ash conveying pipeline 2. Parallel conveying can be carried out, with high ash conveying efficiency and the ability to handle continuous and stable ash volume conveying.

[0044] In some embodiments, a first switching valve 1.1 is connected to one side of the first ash conveying pipeline 1 close to the ash silo 1-1 in the flow direction; a second switching valve 21 is connected to one side of the second ash conveying pipeline 2 close to the desulfurization tower 1-2 in the flow direction; both the first switching valve 1.1 and the second switching valve 21 are electrically connected to the controller 6. In this way, according to actual needs, the first ash conveying pipeline 1 and the second ash conveying pipeline 2 can be respectively conducted or cut off through the first switching valve 1.1 and the second switching valve 21, making the ash conveying more intelligent and automated.

[0045] In some embodiments, it further includes a first ash conveying branch 9 and a second ash conveying branch 10; one end of the first ash conveying branch 9 is connected to the desulfurization tower 1-2, and the other end is connected to the first ash conveying pipeline 1, and a third switching valve 91 is connected in the flow direction of the first ash conveying branch 9; one end of the second ash conveying branch 10 is connected to the ash silo 1-1, and the other end is connected to the second ash conveying pipeline 2, and a fourth switching valve 101 is connected in the flow direction of the second ash conveying branch 10; both the third switching valve 91 and the fourth switching valve 101 are electrically connected to the controller 6. The ash in both the first ash storage module 3 and the second ash storage module 4 can enter the desulfurization tower 1-2 or the ash silo 1-1, enabling cross ash conveying and higher efficiency.

[0046] In some embodiments, it further includes a first air supply pipeline 11, a second air supply pipeline 12, a first air supply valve 13, and a second air supply valve 14; both ends of the first air supply pipeline 11 are respectively connected to both sides of the first ash conveying pipeline 1 in the flow direction, and a first air supply valve 13 is connected in the flow direction of the first air supply pipeline 11; both ends of the second air supply pipeline 12 are respectively connected to both sides of the second ash conveying pipeline 2 in the flow direction, and a second air supply valve 14 is connected in the flow direction of the second air supply pipeline 12; both the first air supply valve 13 and the second air supply valve 14 are electrically connected to the controller 6. In this way, air supply can be carried out, increasing the pressure difference, preventing blockage and ash accumulation, and improving the ash conveying efficiency.

[0047] In some embodiments, pressure transmitters 15 are connected to both the first ash conveying pipeline 1 and the second ash conveying pipeline 2 in the flow direction, and the pressure transmitters 15 are electrically connected to the controller 6. It can effectively detect the pressure in the pipeline, making the entire system more intelligent, more convenient for observing the air pressure, and judging the operating conditions.

[0048] In some embodiments, the first ash storage module 3 includes one ash storage unit, and the second ash storage module 4 includes two

[0049] Ash storage unit; each ash storage unit includes a hopper 4.1, a feed valve 4.2, a silo pump 4.3, a discharge valve 4.4, a fluidization pipeline 4.5 and a fluidization valve 4.6; the discharge end of the hopper 4.1 is connected to the feed end of the silo pump 4.3, the feed valve 4.2 is connected between the hopper 4.1 and the silo pump 4.3, and the discharge valve 4.4 is connected to the discharge end of the silo pump 4.3; and the discharge valve 4.4 is connected to the first ash conveying pipeline 1 or the second ash conveying pipeline 2; one end of the fluidization pipeline 4.5 is connected to the silo pump 4.3, and the other end is connected to the first ash conveying pipeline 1 or the second ash conveying pipeline 2; the feed valve 4.2, the discharge valve 4.4 and the fluidization valve 4.6 are all electrically connected to the controller 6.

[0050] It should be noted that the number of ash storage units can be flexibly adjusted according to the actual situation. As shown in the appendix Figure 1 As shown, the controller 6 can be electrically connected to multiple control units 61, and each control unit is respectively close to the desulfurization tower 1-2 or the ash silo 1-1 and each ash storage unit for easy maintenance; the first air valve 7 is located between the fluidization pipeline 4.5 of the first ash storage module 3 and the discharge valve 4.4 of the first ash storage module 3; the second air valve 8 is located between the fluidization pipeline 4.5 of the second ash storage module 4 and the discharge valve 4.4 of the second ash storage module 4, and the discharge valve 4.4 is close to the gas storage tank 5; the ash storage unit in this embodiment can effectively store the ash collected by the dust collector through the hopper 4.1 and opening the feed valve 4.2 in the silo pump 4.3. The fluidization valve 4.5 can control and improve the state of powdery or granular materials during the flow process to ensure the smooth flow and precise control of the materials, so that the ash in the silo pump 4.3 will effectively enter the first ash conveying pipeline 1 or the second ash conveying pipeline 2 by opening the discharge valve 4.4; an air cannon or a vibrator can be additionally set to increase the ash discharging speed of the hopper 4.1 or the silo pump 4.3.

[0051] As shown in the appendix Figure 1 As shown, in some embodiments, the ash storage unit further includes a branch fluidization valve 4.13 and a fluidization branch 4.14. One end of the fluidization branch 4.14 is connected to the silo pump 4.3, and the other end is connected to the flow direction of the fluidization pipeline 4.5. The branch fluidization valve 4.13 is connected to the flow direction of the fluidization branch 4.14, and the branch fluidization valve 4.13 is electrically connected to the controller 6. This can further precisely control.

[0052] In some embodiments, each ash storage unit further includes a manual valve 4.7, an expansion joint 4.8, a bin pump pressure transmitter 4.9, a level switch 4.10, a balance pipeline 4.11, and a balance valve 4.12; the manual valve 4.7, the expansion joint 4.8, and the feed valve 4.2 are sequentially arranged in the direction from the discharge end of the ash hopper 4.1 to the feed hopper of the bin pump 4.3; both the bin pump pressure transmitter 4.9 and the level switch 4.10 are connected to the bin pump 4.3; one end of the balance pipeline 4.11 is connected to the ash hopper 4.1, and the other end is connected to the bin pump 4.3, and the balance valve 4.12 is connected in the flow direction of the balance pipeline 4.11; the bin pump pressure transmitter 4.9, the level switch 4.10, and the balance valve 4.12 are all electrically connected to the controller 6. This makes the ash storage of the ash storage unit safer, ensures the stability of its internal pressure, and the manual valve 4.7 can be normally open and closed when maintenance is required. The expansion joint 4.8 is to deal with high-temperature flue gas and prevent damage to the system caused by thermal expansion and contraction. The level switch 4.10 can continuously start and stop the level control of the ash to control the feed valve 4.2 and the discharge valve 4.4; by the change of the pressure value of the bin pump pressure transmitter 4.9, the first air valve 7, the second air valve 8, the first air make-up valve 13, and the second air make-up valve 14 are controlled.

[0053] As shown in the Figure 2 accompanying drawings, in some embodiments, a gas filter pressure reducer 51 is further connected to the outlet end of the gas storage tank 5, and the gas filter pressure reducer 51 is electrically connected to the controller 6. This can effectively ensure the quality of compressed air.

[0054] As shown in the Figure 1 accompanying drawings, in some embodiments, the gas filter pressure reducer 51 can also be electrically connected to the control unit 61, so as to ensure the quality of compressed air.

[0055] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms "inner", "outer", etc. indicating the direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0056] In the description of the present application, the descriptions with reference to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pneumatic ash conveying system, characterized in that, Including: A first ash conveying pipeline (1), a second ash conveying pipeline (2), a first ash storage module (3), a second ash storage module (4), an air storage tank (5), a controller (6), a first air valve (7), a second air valve (8), an ash silo (1-1), and a desulfurization tower (1-2); one end of the first ash conveying pipeline (1) is connected to the air storage tank (5), and the other end is connected to the ash silo (1-1). And in the flow direction of the first ash conveying pipeline (1), the first air valve (7) and the first ash storage module (3) are sequentially connected, so that the ash in the first ash storage module (3) can be conveyed to the ash silo (1-1) according to the air pressure difference in the first ash conveying pipeline (1). One end of the second ash conveying pipeline (2) is connected to the air storage tank (5), and the other end is connected to the desulfurization tower (1-2). And in the flow direction of the second ash conveying pipeline (2), the second air valve (8) and the second ash storage module (4) are sequentially connected, so that the ash in the second ash storage module (4) can be conveyed to the desulfurization tower (1-2) according to the air pressure difference in the second ash conveying pipeline (2); the first ash storage module (3), the second ash storage module (4), the first air valve (7), and the second air valve (8) are all electrically connected to the controller (6).

2. The pneumatic ash conveying system according to claim 1, wherein On one side of the first ash conveying pipeline (1) close to the ash silo (1-1) in the flow direction, a first switching valve (1.1) is connected; on one side of the second ash conveying pipeline (2) close to the desulfurization tower (1-2) in the flow direction, a second switching valve (21) is connected; the first switching valve (1.1) and the second switching valve (21) are both electrically connected to the controller (6).

3. The pneumatic ash conveying system according to claim 2, wherein It further includes a first ash conveying branch (9) and a second ash conveying branch (10); One end of the first ash conveying branch (9) is connected to the desulfurization tower (1-2), and the other end is connected to the first ash conveying pipeline (1). And in the flow direction of the first ash conveying branch (9), a third switching valve (91) is connected; One end of the second ash conveying branch (10) is connected to the ash silo (1-1), and the other end is connected to the second ash conveying pipeline (2). And in the flow direction of the second ash conveying branch (10), a fourth switching valve (101) is connected; The third switching valve (91) and the fourth switching valve (101) are both electrically connected to the controller (6).

4. The pneumatic ash conveying system according to claim 3, wherein It further includes a first air supply pipeline (11), a second air supply pipeline (12), a first air supply valve (13), and a second air supply valve (14); Both ends of the first air supply pipeline (11) are respectively connected to both sides in the flow direction of the first ash conveying pipeline (1), and the first air supply valve (13) is connected in the flow direction of the first air supply pipeline (1); Both ends of the second air supply pipeline (12) are respectively connected to both sides in the flow direction of the second ash conveying pipeline (2), and the second air supply valve (14) is connected in the flow direction of the second air supply pipeline (12); The first air supply valve (13) and the second air supply valve (14) are both electrically connected to the controller (6).

5. The pneumatic ash conveying system according to claim 4, wherein, A pressure transmitter (15) is connected in the flow direction of the first ash conveying pipeline (1) and the second ash conveying pipeline (2), and the pressure transmitter (15) is electrically connected to the controller (6).

6. The pneumatic ash conveying system according to claim 5, characterized in that, The first ash storage module (3) includes one ash storage unit, and the second ash storage module (4) includes two such ash storage units; each ash storage unit includes a hopper (4.1), a feed valve (4.2), a bin pump (4.3), a discharge valve (4.4), a fluidization pipeline (4.5) and a fluidization valve (4.6); the discharge end of the hopper (4.1) is connected to the feed end of the bin pump (4.3), the feed valve (4.2) is connected between the hopper (4.1) and the bin pump (4.3), and the discharge valve (4.4) is connected to the discharge end of the bin pump (4.3); and the discharge valve (4.4) is connected to the first ash conveying pipeline (1) or the second ash conveying pipeline (2); one end of the fluidization pipeline (4.5) is connected to the bin pump (4.3), and the other end is connected to the first ash conveying pipeline (1) or the second ash conveying pipeline (2); the feed valve (4.2), the discharge valve (4.4) and the fluidization valve (4.6) are all electrically connected to the controller (6).

7. The pneumatic ash conveying system according to claim 6, characterized in that, Each ash storage unit further includes a manual valve (4.7), an expansion joint (4.8), a bin pump pressure transmitter (4.9), a level switch (4.10), a balance pipeline (4.11) and a balance valve (4.12); the manual valve (4.7), the expansion joint (4.8) and the feed valve (4.2) are arranged in sequence along the direction from the discharge end of the hopper (4.1) to the feed hopper of the bin pump (4.3); the bin pump pressure transmitter (4.9) and the level switch (4.10) are both connected to the bin pump (4.3); one end of the balance pipeline (4.11) is connected to the hopper (4.1), and the other end is connected to the bin pump (4.3), and the balance valve (4.12) is connected in the flow direction of the balance pipeline (4.11); the bin pump pressure transmitter (4.9), the level switch (4.10) and the balance valve (4.12) are all electrically connected to the controller (6).

8. The pneumatic ash conveying system according to claim 7, characterized in that, The gas outlet end of the gas storage tank (5) is further connected with a gas filter pressure reducer (51), and the gas filter pressure reducer (51) is electrically connected to the controller (6).

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