Three-section rotary air pre-heater and control method thereof

Abstract

The invention discloses a trisection rotary air pre-heater and a control method thereof.The trisection rotary air pre-heater comprises an air pre-heater shell, and a smoke bin, a primary air bin, a secondary air bin and a plurality of adjustable bins are arranged in the air pre-heater shell; and the connection relation between the primary branch bins and the adjustable bins and the connection relation between the secondary air bin and all the adjustable bins are adjusted, and the air pre-heater and the control method thereof are high in heat exchange efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange efficiency optimization of air preheaters and relates to a three-compartment rotary air preheater and a control method thereof. Background Art

[0002] In recent years, after most of the coal-fired power plant boilers in my country have been mixed with non-designed coal types, the ratio of the primary and secondary air volumes during boiler operation has often changed. Since the ratio of the heat exchange area of ​​the primary air to the heat exchange area of ​​the secondary air is fixed in the existing technology, when the ratio of the primary and secondary air volumes changes, the heat exchange efficiency of the air preheater decreases. Therefore, it is urgent to develop a technology to improve the heat exchange efficiency of the air preheater and avoid the decrease in the heat exchange efficiency of the air preheater. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a three-compartment rotary air preheater and a control method thereof, wherein the air preheater and the control method thereof have high heat exchange efficiency.

[0004] To achieve the above-mentioned purpose, the present invention discloses a three-compartment rotary air preheater, comprising an air preheater shell, in which a smoke compartment, a primary air compartment, a secondary air compartment and a plurality of adjustable compartments are arranged, wherein during operation, the connection relationship between the primary compartment and the adjustable compartment, as well as the connection relationship between the secondary air compartment and each adjustable compartment are adjusted according to the ratio of the primary air flow rate to the secondary air flow rate required for the operation of the boiler.

[0005] The further improvement of the three-compartment rotary air preheater of the present invention is:

[0006] Furthermore, a smoke bin, a primary air bin, an adjustable bin AHⅠ, an adjustable bin AHⅡ and a secondary air bin are arranged in the air preheater shell, and the smoke bin, the primary air bin, the adjustable bin AHⅠ, the adjustable bin AHⅡ and the secondary air bin are distributed in sequence along the circumferential direction.

[0007] Furthermore, it also includes an inlet smoke channel, an outlet smoke channel, an inlet primary air channel, an outlet primary air channel, an inlet adjustable air channel AHDⅠ, an outlet adjustable air channel AHDⅠ, an inlet adjustable air channel AHDⅡ, an outlet adjustable air channel AHDⅡ, an inlet secondary air channel and an outlet secondary air channel;

[0008] The entrance of the smoke bin is connected with the inlet smoke channel, and the outlet of the smoke bin is connected with the outlet smoke channel; the entrance of the primary air bin is connected with the inlet primary air channel, and the outlet of the primary air bin is connected with the outlet primary air channel, the entrance of the adjustable bin AHⅠ is connected with the inlet adjustable air channel AHDⅠ, and the outlet of the adjustable bin AHⅠ is connected with the outlet adjustable air channel AHDⅠ102; the entrance of the adjustable bin AHⅡ is connected with the inlet adjustable air channel AHDⅡ, and the outlet of the adjustable bin AHⅡ is connected with the outlet adjustable air channel AHDⅡ, the entrance of the secondary air bin is connected with the inlet secondary air channel, and the outlet of the secondary air bin is connected with the outlet secondary air channel.

[0009] Furthermore, the inlet primary air channel is connected to the inlet secondary air channel through a first connecting air duct, and a first inlet valve, a second inlet valve and a third inlet valve are provided on the first connecting air duct, wherein the inlet primary air channel, the first inlet valve, the second inlet valve, the third inlet valve and the inlet secondary air channel are distributed in sequence, and the inlet of the inlet adjustable air channel AHDⅠ is connected to the pipe between the first inlet valve and the second inlet valve on the first connecting air duct, and the inlet of the inlet adjustable air channel AHDⅡ is connected to the pipe between the second inlet valve and the third inlet valve on the first connecting air duct.

[0010] Furthermore, the outlet primary air channel is connected to the outlet secondary air channel through a second connecting air channel, and a first outlet valve, a second outlet valve and a third outlet valve are provided on the second connecting air channel, wherein the outlet primary air channel, the first outlet valve, the second outlet valve, the third outlet valve and the outlet secondary air channel are distributed in sequence, and the outlet of the outlet adjustable air channel AHDⅠ is connected to the pipe between the first outlet valve and the second outlet valve on the second connecting air channel, and the outlet of the outlet adjustable air channel AHDⅡ is connected to the pipe between the second outlet valve and the third outlet valve on the second connecting air channel.

[0011] Furthermore, the first outlet valve, the first inlet valve, the second outlet valve, the second inlet valve, the third outlet valve and the third inlet valve are all baffle doors.

[0012] Furthermore, it also includes a controller, which is connected to the control end of the first outlet valve, the control end of the first inlet valve, the control end of the second outlet valve, the control end of the second inlet valve, the control end of the third outlet valve and the control end of the third inlet valve.

[0013] The present invention discloses a control method for a three-compartment rotary air preheater, comprising:

[0014] Control the first outlet valve and the first inlet valve to close, and control the second outlet valve, the second inlet valve, the third inlet valve and the third outlet valve to open, so that the secondary air bin is connected in parallel with the adjustable bin AHⅠ and the adjustable bin AHⅡ;

[0015] Control the second inlet valve and the second outlet valve to close, and control the first inlet valve, the first outlet valve, the third inlet valve and the third outlet valve to open, so that the primary air bin is connected in parallel with the adjustable bin AHⅠ, and the secondary air bin is connected in parallel with the adjustable bin AHⅡ;

[0016] The third inlet valve and the third outlet valve are controlled to be closed, and the first inlet valve, the first outlet valve, the second inlet valve and the second outlet valve are controlled to be opened, so that the primary air bin is connected in parallel with the adjustable bins AHⅠ and AHⅡ.

[0017] The control method of the three-compartment rotary air preheater of the present invention is further improved in that:

[0018] Furthermore, the first outlet valve, the first inlet valve, the second outlet valve, the second inlet valve, the third outlet valve and the third inlet valve are all baffle doors.

[0019] Furthermore, it also includes a controller, which is connected to the control end of the first outlet valve, the control end of the first inlet valve, the control end of the second outlet valve, the control end of the second inlet valve, the control end of the third outlet valve and the control end of the third inlet valve.

[0020] The present invention has the following beneficial effects:

[0021] During specific operation, the three-compartment rotary air preheater and the control method thereof described in the present invention adjust the connection relationship between the primary compartment and the adjustable compartment, as well as the connection relationship between the secondary air compartment and each adjustable compartment, according to the ratio of the primary air flow rate to the secondary air flow rate required for the operation of the boiler. The proportion of the primary air compartment and the secondary air compartment can be flexibly adjusted to adapt to the ratio of the primary air flow rate to the secondary air flow rate, thereby avoiding a decrease in the heat exchange efficiency of the air preheater and achieving the purpose of improving the heat exchange efficiency of the air preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural diagram of the present invention.

[0024] Among them, 1 is the air preheater shell, 21 is the inlet flue gas channel, 22 is the outlet flue gas channel, 31 is the inlet primary air channel, 32 is the outlet primary air channel, 41 is the inlet secondary air channel, 42 is the outlet secondary air channel, 5 is the primary air bin, 6 is the adjustable bin AHⅠ, 7 is the adjustable bin AHⅡ, 8 is the secondary air bin, 9 is the flue gas bin, 101 is the inlet adjustable air channel AHDⅠ, 102 is the outlet adjustable air channel AHDⅠ, 111 is the inlet adjustable air channel AHDⅡ, 112 is the outlet adjustable air channel AHDⅡ, 121 is the first connecting air duct, 122 is the second connecting air duct, A1 is the first outlet valve, A2 is the first inlet valve, B1 is the second outlet valve, B2 is the second inlet valve, C1 is the third outlet valve, and C2 is the third inlet valve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0028] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0029] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0030] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0033] Embodiment 1

[0034] refer to Figure 1 The three-compartment rotary air preheater of the present invention comprises an air preheater shell 1, in which a smoke compartment 9, a primary air compartment 5, a secondary air compartment 8 and a plurality of adjustable compartments are arranged. During operation, the connection relationship between the primary compartment and the adjustable compartment and the connection relationship between the secondary air compartment 8 and each adjustable compartment are adjusted according to the ratio of the primary air flow rate to the secondary air flow rate required for the operation of the boiler.

[0035] Embodiment 2

[0036] refer to Figure 1 The three-compartment rotary air preheater of the present invention comprises an air preheater shell 1, in which a smoke bin 9, a primary air bin 5, an adjustable bin AHⅠ6, an adjustable bin AHⅡ7 and a secondary air bin 8 are arranged. The smoke bin 9, the primary air bin 5, the adjustable bin AHⅠ6, the adjustable bin AHⅡ7 and the secondary air bin 8 are sequentially distributed along the circumferential direction. The inlet of the smoke bin 9 is connected to the inlet smoke channel 21, and the outlet of the smoke bin 9 is connected to the outlet smoke channel 22; the inlet of the primary air bin 5 is connected to the inlet primary air channel 31, and the outlet of the primary air bin 5 is connected to the outlet smoke channel 22. The outlet is connected with the outlet primary air channel 32, the inlet of the adjustable bin AHⅠ6 is connected with the inlet adjustable air channel AHDⅠ101, and the outlet of the adjustable bin AHⅠ6 is connected with the outlet adjustable air channel AHDⅠ102; the inlet of the adjustable bin AHⅡ7 is connected with the inlet adjustable air channel AHDⅡ111, and the outlet of the adjustable bin AHⅡ7 is connected with the outlet adjustable air channel AHDⅡ112, the inlet of the secondary air bin 8 is connected with the inlet secondary air channel 41, and the outlet of the secondary air bin 8 is connected with the outlet secondary air channel 42.

[0037] The inlet primary air channel 31 is connected to the inlet secondary air channel 41 through the first connecting air channel 121, and the first inlet valve A2, the second inlet valve B2 and the third inlet valve C2 are arranged on the first connecting air channel 121, wherein the inlet primary air channel 31, the first inlet valve A2, the second inlet valve B2, the third inlet valve C2 and the inlet secondary air channel 41 are distributed in sequence, and the inlet of the inlet adjustable air channel AHDⅠ101 is connected to the pipeline between the first inlet valve A2 and the second inlet valve B2 on the first connecting air channel 121, and the inlet of the inlet adjustable air channel AHDⅡ111 is connected to the pipeline between the second inlet valve B2 and the third inlet valve C2 on the first connecting air channel 121;

[0038] The outlet primary air channel 32 is connected to the outlet secondary air channel 42 through the second connecting air channel 122, and the second connecting air channel 122 is provided with a first outlet valve A1, a second outlet valve B1 and a third outlet valve C1, wherein the outlet primary air channel 32, the first outlet valve A1, the second outlet valve B1, the third outlet valve C1 and the outlet secondary air channel 42 are distributed in sequence, and the outlet of the outlet adjustable air channel AHDⅠ102 is connected to the pipeline between the first outlet valve A1 and the second outlet valve B1 on the second connecting air channel 122, and the outlet of the outlet adjustable air channel AHDⅡ112 is connected to the pipeline between the second outlet valve B1 and the third outlet valve C1 on the second connecting air channel 122.

[0039] In this embodiment, the first outlet valve A1, the first inlet valve A2, the second outlet valve B1, the second inlet valve B2, the third outlet valve C1 and the third inlet valve C2 are all baffle doors.

[0040] In this embodiment, a controller is also included, which is connected to the control end of the first outlet valve A1, the control end of the first inlet valve A2, the control end of the second outlet valve B1, the control end of the second inlet valve B2, the control end of the third outlet valve C1 and the control end of the third inlet valve C2.

[0041] Embodiment 3

[0042] In this embodiment, the circumferential angle corresponding to the primary air bin 5 is 30°, the circumferential angle corresponding to the adjustable bin AHⅠ6 is 15°, the circumferential angle corresponding to the adjustable bin AHⅡ7 is 15°, the circumferential angle corresponding to the secondary air bin 8 is 90°, the circumferential angle corresponding to the flue gas bin 9 is 165°, and the remaining 45° circumferential angle is used for introducing sealing air at intervals. The control method of the three-bin rotary air preheater described in this embodiment includes the following steps:

[0043] According to the results of the online measurement of the primary and secondary air volumes of the unit, the proportion of primary air in the total air volume is calculated to adjust the opening and closing of the variable compartments. When the boiler operation adjustment requires the ratio of primary air flow to secondary air flow to be close to 2:8, the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7 are combined with the secondary air compartment 8 to introduce secondary air, and the heat exchange area ratio of primary air to secondary air reaches 2:8, so as to achieve the purpose of improving the heat exchange efficiency of the air preheater. At this time, the first outlet valve A1 and the first inlet valve A2 are controlled to be closed, and the second outlet valve B1, the second inlet valve B2, the third inlet valve C2 and the third outlet valve C1 are controlled to be opened, so that the secondary air compartment 8 is connected in parallel with the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7.

[0044] According to the results of the online measurement of the primary and secondary air volumes of the unit, the proportion of primary air in the total air volume is calculated to adjust the opening and closing of the variable compartments. When the boiler operation adjustment requires the primary air flow rate to be close to 3:7, the adjustable compartment AHⅠ6 and the primary air compartment 5 can be selected to jointly introduce primary air, and the adjustable compartment AHⅡ7 and the secondary air compartment 8 can be jointly introduced to introduce secondary air, so that the heat exchange area ratio of the primary air and the secondary air reaches 3:7, so as to achieve the purpose of improving the heat exchange efficiency of the air preheater. At this time, the second inlet valve B2 and the second outlet valve B1 are controlled to be closed, and the first inlet valve A2, the first outlet valve A1, the third inlet valve C2 and the third outlet valve C1 are controlled to be opened, so that the primary air compartment 5 is connected in parallel with the adjustable compartment AHⅠ6, and the secondary air compartment 8 is connected in parallel with the adjustable compartment AHⅡ7.

[0045] The ratio of primary air to total air volume is calculated based on the results of online measurement of primary and secondary air volume of the unit, so as to adjust the opening and closing of the variable compartments. When the boiler operation adjustment requires the ratio of primary air flow to secondary air flow to be close to 4:6, the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7 can be selected to be combined with the primary air compartment 5 to introduce primary air, so that the ratio of the heat exchange area of ​​primary air to secondary air reaches 3:7, so as to achieve the purpose of improving the heat exchange efficiency of the air preheater. At this time, the third inlet valve C2 and the third outlet valve C1 are controlled to be closed, and the first inlet valve A2, the first outlet valve A1, the second inlet valve B2 and the second outlet valve B1 are controlled to be opened, so that the primary air compartment 5 is connected in parallel with the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7, so as to achieve the purpose of improving the heat exchange efficiency of the air preheater.

[0046] Embodiment 4

[0047] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the control method of the three-compartment rotary air preheater are implemented, for example, comprising: controlling the first outlet valve A1 and the first inlet valve A2 to be closed, controlling the second outlet valve B1, the second inlet valve B2, the third inlet valve C2 and the third outlet valve C1 to be opened, so that the secondary air compartment 8 is connected in parallel with the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7; controlling The second inlet valve B2 and the second outlet valve B1 are closed, and the first inlet valve A2, the first outlet valve A1, the third inlet valve C2 and the third outlet valve C1 are controlled to open, so that the primary air bin 5 is connected in parallel with the adjustable bin AHI6, and the secondary air bin 8 is connected in parallel with the adjustable bin AHI7; the third inlet valve C2 and the third outlet valve C1 are controlled to close, and the first inlet valve A2, the first outlet valve A1, the second inlet valve B2 and the second outlet valve B1 are controlled to open, so that the primary air bin 5 is connected in parallel with the adjustable bin AHI6 and the adjustable bin AHI7. Wherein, the memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc.; the processor, the network interface, and the memory are interconnected through an internal bus, and the internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc., and the bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs, and specifically, the program may include program codes, and the program codes include computer operation instructions. The memory may include memory and nonvolatile memory and provides instructions and data to the processor.

[0048] Embodiment 5

[0049] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method of the three-compartment rotary air preheater are implemented, for example, including: controlling the first outlet valve A1 and the first inlet valve A2 to be closed, and controlling the second outlet valve B1, the second inlet valve B2, the third inlet valve C2 and the third outlet valve C1 to be opened, so that the secondary air compartment 8 is connected in parallel with the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7; controlling the second inlet valve B2 and the second outlet valve B1 to be closed, and controlling the first inlet valve A2, the first outlet valve A1, the third inlet valve C2 and the third outlet valve C1 to be opened, so that the primary air compartment 5 is connected in parallel with the adjustable compartment AHⅠ6, and the secondary air compartment 8 is connected in parallel with the adjustable compartment AHⅡ7; controlling the third inlet valve C2 and the third outlet valve C1 to be closed, and controlling the first inlet valve A2, the first outlet valve A1, the second inlet valve B2 and the second outlet valve B1 to be opened, so that the primary air compartment 5 is connected in parallel with the adjustable compartment AHⅠ6 and the adjustable compartment AHⅡ7. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0050] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0051] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0052] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0054] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0055] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A three-compartment rotary air preheater, characterized in that: The air preheater comprises an air preheater shell (1), wherein a smoke bin (9), a primary air bin (5), a secondary air bin (8) and a plurality of adjustable bins are arranged in the air preheater shell (1), wherein during operation, the connection relationship between the primary bin and the adjustable bin and the connection relationship between the secondary air bin (8) and each adjustable bin are adjusted according to the ratio of the primary air flow rate to the secondary air flow rate required for the operation of the boiler.

2. The three-compartment rotary air preheater according to claim 1 is characterized in that: A smoke bin (9), a primary air bin (5), an adjustable bin AHⅠ (6), an adjustable bin AHⅡ (7) and a secondary air bin (8) are arranged in the air preheater shell 1. The smoke bin (9), the primary air bin (5), the adjustable bin AHⅠ (6), the adjustable bin AHⅡ (7) and the secondary air bin (8) are sequentially distributed along the circumferential direction.

3. The three-compartment rotary air preheater according to claim 2 is characterized in that: It also includes an inlet smoke channel (21), an outlet smoke channel (22), an inlet primary air channel (31), an outlet primary air channel (32), an inlet adjustable air channel AHDⅠ (101), an outlet adjustable air channel AHDⅠ (102), an inlet adjustable air channel AHDⅡ (111), an outlet adjustable air channel AHDⅡ (112), an inlet secondary air channel (41) and an outlet secondary air channel (42); The inlet of the smoke bin (9) is connected to the inlet smoke channel (21), and the outlet of the smoke bin (9) is connected to the outlet smoke channel (22); the inlet of the primary air bin (5) is connected to the inlet primary air channel (31), and the outlet of the primary air bin (5) is connected to the outlet primary air channel (32); the inlet of the adjustable bin AHⅠ (6) is connected to the inlet adjustable air channel AHDⅠ (101), and the outlet of the adjustable bin AHⅠ (6) is connected to the outlet adjustable air channel AHDⅠ (102); the inlet of the adjustable bin AHⅡ (7) is connected to the inlet adjustable air channel AHDⅡ (111), and the outlet of the adjustable bin AHⅡ (7) is connected to the outlet adjustable air channel AHDⅡ (112); the inlet of the secondary air bin (8) is connected to the inlet secondary air channel (41), and the outlet of the secondary air bin (8) is connected to the outlet secondary air channel (42).

4. The three-compartment rotary air preheater according to claim 3 is characterized in that: The inlet primary air channel (31) and the inlet secondary air channel (41) are connected via a first connecting air channel (121), and a first inlet valve (A2), a second inlet valve (B2) and a third inlet valve (C2) are provided on the first connecting air channel (121), wherein the inlet primary air channel (31), the first inlet valve (A2), the second inlet valve (B2), the third inlet valve (C2) and the inlet secondary air channel (41) are sequentially distributed, and an inlet of the inlet adjustable air channel AHDⅠ (101) is connected to a pipeline between the first inlet valve (A2) and the second inlet valve (B2) on the first connecting air channel (121), and an inlet of the inlet adjustable air channel AHDⅡ (111) is connected to a pipeline between the second inlet valve (B2) and the third inlet valve (C2) on the first connecting air channel (121).

5. The three-compartment rotary air preheater according to claim 3 is characterized in that: The outlet primary air channel (32) and the outlet secondary air channel (42) are connected via a second connecting air channel (122), and a first outlet valve (A1), a second outlet valve (B1) and a third outlet valve (C1) are provided on the second connecting air channel (122), wherein the outlet primary air channel (32), the first outlet valve (A1), the second outlet valve (B1), the third outlet valve (C1) and the outlet secondary air channel (42) are sequentially distributed, and the outlet of the outlet adjustable air channel AHDⅠ (102) is connected to a pipeline between the first outlet valve (A1) and the second outlet valve (B1) on the second connecting air channel (122), and the outlet of the outlet adjustable air channel AHDⅡ (112) is connected to a pipeline between the second outlet valve (B1) and the third outlet valve (C1) on the second connecting air channel (122).

6. The three-compartment rotary air preheater according to claim 5, characterized in that: The first outlet valve (A1), the first inlet valve (A2), the second outlet valve (B1), the second inlet valve (B2), the third outlet valve (C1) and the third inlet valve (C2) are all baffle doors.

7. The three-compartment rotary air preheater according to claim 5, characterized in that: It also includes a controller, which is connected to the control end of the first outlet valve (A1), the control end of the first inlet valve (A2), the control end of the second outlet valve (B1), the control end of the second inlet valve (B2), the control end of the third outlet valve (C1) and the control end of the third inlet valve (C2).

8. A control method for the three-compartment rotary air preheater according to claim 5, characterized in that: include: The first outlet valve (A1) and the first inlet valve (A2) are controlled to be closed, and the second outlet valve (B1), the second inlet valve (B2), the third inlet valve (C2) and the third outlet valve (C1) are controlled to be opened, so that the secondary air bin (8) is connected in parallel with the adjustable bin AHⅠ (6) and the adjustable bin AHⅡ (7); The second inlet valve (B2) and the second outlet valve (B1) are controlled to be closed, and the first inlet valve (A2), the first outlet valve (A1), the third inlet valve (C2) and the third outlet valve (C1) are controlled to be opened, so that the primary air bin (5) is connected in parallel with the adjustable bin AHⅠ (6), and the secondary air bin (8) is connected in parallel with the adjustable bin AHⅡ (7); The third inlet valve C2 and the third outlet valve (C1) are controlled to be closed, and the first inlet valve (A2), the first outlet valve (A1), the second inlet valve (B2) and the second outlet valve (B1) are controlled to be opened, so that the primary air bin (5) is connected in parallel with the adjustable bin AHⅠ (6) and the adjustable bin AHⅡ (7).

9. The control method of three-compartment rotary air preheater according to claim 8, characterized in that: The first outlet valve (A1), the first inlet valve (A2), the second outlet valve (B1), the second inlet valve (B2), the third outlet valve (C1) and the third inlet valve (C2) are all baffle doors.

10. The control method of three-compartment rotary air preheater according to claim 8, characterized in that: It also includes a controller, which is connected to the control end of the first outlet valve (A1), the control end of the first inlet valve (A2), the control end of the second outlet valve (B1), the control end of the second inlet valve (B2), the control end of the third outlet valve (C1) and the control end of the third inlet valve (C2).

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