System and method for adjusting wall temperature deviation of heating surface of opposed firing boiler

Abstract

The invention discloses an opposed firing boiler heating surface wall temperature deviation adjusting system and method, a first-stage high-temperature flue gas distribution box system is internally provided with a plurality of first-stage high-temperature flue gas nozzles, and a second-stage high-temperature flue gas distribution box system is internally provided with a plurality of second-stage high-temperature flue gas nozzles; third-stage high-temperature flue gas nozzles are arranged in the third-stage high-temperature flue gas distribution box system, each first-stage high-temperature flue gas nozzle directly faces the left side and the right side of the first-stage heating surface, each second-stage high-temperature flue gas nozzle directly faces the left side and the right side of the second-stage heating surface, and each third-stage high-temperature flue gas nozzle directly faces the left side and the right side of the third-stage heating surface; a primary high-temperature flue gas taking opening is formed in a flue on the rear portion of the boiler heating surface and communicates with the first-stage high-temperature flue gas nozzle, the second-stage high-temperature flue gas nozzle and the third-stage high-temperature flue gas nozzle, and by means of the system and method, the temperature deviation of the left side wall and the right side wall of the heating surface is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler unit operation, and relates to a system and method for regulating the deviation of the wall temperature of a heating surface of a counter-combustion boiler. Background Art

[0002] At present, the mainstream combustion organization modes of thermal power plants are four-corner tangential combustion and counter combustion. Compared with the four-corner tangential combustion mode, the counter combustion boiler adopts a swirl burner. In terms of combustion economy, its advantages are: (1) The primary and secondary air of the swirl burner are mixed early and strongly, ensuring the timely and full combustion of coal powder. (2) The swirl burner has a high entrainment rate for high-temperature flue gas. (3) The heat load of the furnace of the counter combustion is easy to control evenly. However, in the actual operation of the counter combustion boiler, it is very easy to have a deviation in the flue gas temperature and steam temperature on the left and right sides. This is mainly due to the deviation in the air volume and powder volume between the burners on the same layer during operation, which leads to a deviation in the flue gas temperature and velocity in the subsequent combustion and flue gas process, which in turn affects the wall temperature and steam temperature of each heating surface in the boiler flue, resulting in over-temperature and over-limit phenomena of some wall temperature extremes, affecting the safe and stable operation of the counter combustion boiler unit. 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 system and method for regulating the wall temperature deviation of the heating surface of a counter-combustion boiler, which reduces the deviation of the wall temperature on the left and right sides of the heating surface.

[0004] To achieve the above-mentioned purpose, the wall temperature deviation adjustment system of the heating surface of the counter-combustion boiler described in the present invention includes a first-level high-temperature flue gas distribution box system, a second-level high-temperature flue gas distribution box system, and a third-level high-temperature flue gas distribution box system. The first-level heating surface, the second-level heating surface, and the third-level heating surface are sequentially arranged on the tail flue of the boiler furnace along the flue gas flow direction. A temperature acquisition module for detecting the temperature at different measuring points on the left and right sides of the first-level heating surface, the temperature at different measuring points on the left and right sides of the second-level heating surface, and the temperature at different measuring points on the left and right sides of the third-level heating surface is arranged in the tail flue of the boiler furnace;

[0005] A number of first-level high-temperature flue gas nozzles are arranged in the first-level high-temperature flue gas distribution box system, a number of second-level high-temperature flue gas nozzles are arranged in the second-level high-temperature flue gas distribution box system, and a third-level high-temperature flue gas nozzle is arranged in the third-level high-temperature flue gas distribution box system. Each first-level high-temperature flue gas nozzle faces the left and right sides of the first-level heating surface, each second-level high-temperature flue gas nozzle faces the left and right sides of the second-level heating surface, and each third-level high-temperature flue gas nozzle faces the left and right sides of the third-level heating surface. A primary high-temperature flue gas intake port is arranged on the flue at the rear of the boiler heating surface, and the primary high-temperature flue gas intake port is respectively connected with the first-level high-temperature flue gas nozzle, the second-level high-temperature flue gas nozzle and the third-level high-temperature flue gas nozzle.

[0006] Furthermore, the first-level high-temperature flue gas distribution box system includes a left-side first-level high-temperature flue gas distribution box and a right-side first-level high-temperature flue gas distribution box. A number of first-level high-temperature flue gas nozzles are arranged in the left-side first-level high-temperature flue gas distribution box and the right-side first-level high-temperature flue gas distribution box. The first-level high-temperature flue gas nozzles in the left-side first-level high-temperature flue gas distribution box face the left side of the first-level heating surface; the first-level high-temperature flue gas nozzles in the right-side first-level high-temperature flue gas distribution box face the right side of the first-level heating surface.

[0007] Furthermore, the secondary high-temperature flue gas distribution box system includes a left-side secondary high-temperature flue gas distribution box and a right-side secondary high-temperature flue gas distribution box. A number of secondary high-temperature flue gas nozzles are arranged in the left-side secondary high-temperature flue gas distribution box and the right-side secondary high-temperature flue gas distribution box. The secondary high-temperature flue gas nozzles in the left-side secondary high-temperature flue gas distribution box face the left side of the secondary heating surface; the secondary high-temperature flue gas nozzles in the right-side secondary high-temperature flue gas distribution box face the right side of the secondary heating surface.

[0008] Furthermore, the three-stage high-temperature flue gas distribution box system includes a left-side three-stage high-temperature flue gas distribution box and a right-side three-stage high-temperature flue gas distribution box. A number of three-stage high-temperature flue gas nozzles are arranged in the left-side three-stage high-temperature flue gas distribution box and the right-side three-stage high-temperature flue gas distribution box. The three-stage high-temperature flue gas nozzles in the left-side three-stage high-temperature flue gas distribution box face the left side of the three-stage heating surface, and the three-stage high-temperature flue gas nozzles in the right-side three-stage high-temperature flue gas distribution box face the right side of the three-stage heating surface.

[0009] Furthermore, it also includes a first-level temperature-balanced induced draft fan, a second-level temperature-balanced induced draft fan and a third-level temperature-balanced induced draft fan, the primary high-temperature smoke inlet is connected to the inlet of the first-level temperature-balanced induced draft fan, the inlet of the second-level temperature-balanced induced draft fan and the inlet of the third-level temperature-balanced induced draft fan, the outlet of the first-level temperature-balanced induced draft fan is connected to the first-level high-temperature smoke outlet in the left-level first-level high-temperature smoke distribution box; the outlet of the first-level temperature-balanced induced draft fan is connected to the first-level high-temperature smoke outlet in the right-level first-level high-temperature smoke distribution box;

[0010] The outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature flue gas nozzle in the left secondary high-temperature flue gas distribution box; the outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature flue gas nozzle in the right secondary high-temperature flue gas distribution box;

[0011] The outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle in the three-stage high-temperature flue gas distribution box on the left; the outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle in the three-stage high-temperature flue gas distribution box on the right.

[0012] Furthermore, the outlet of the first-level temperature-balanced induced draft fan is connected to the first-level high-temperature smoke nozzle in the left-side first-level high-temperature smoke distribution box via the left-side temperature-balanced smoke regulating valve of the first-level high-temperature smoke; the outlet of the first-level temperature-balanced induced draft fan is connected to the first-level high-temperature smoke nozzle in the right-side first-level high-temperature smoke distribution box via the right-side temperature-balanced smoke regulating valve of the first-level high-temperature smoke.

[0013] Furthermore, the outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature smoke nozzle in the left secondary high-temperature smoke distribution box via the left-side temperature-balanced smoke regulating valve of the secondary high-temperature smoke; the outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature smoke nozzle in the right-side secondary high-temperature smoke distribution box via the right-side temperature-balanced smoke regulating valve of the secondary high-temperature smoke.

[0014] Furthermore, the outlet of the three-stage temperature balanced induced draft fan is connected to the three-stage high-temperature smoke nozzle in the left three-stage high-temperature smoke distribution box via the temperature balanced smoke regulating valve on the left side of the three-stage high-temperature smoke; the outlet of the three-stage temperature balanced induced draft fan is connected to the three-stage high-temperature smoke nozzle in the right three-stage high-temperature smoke distribution box via the temperature balanced smoke regulating valve on the right side of the three-stage high-temperature smoke.

[0015] Furthermore, the positions of the first-stage high-temperature flue gas nozzle, the second-stage high-temperature flue gas nozzle and the third-stage high-temperature flue gas nozzle are adjustable.

[0016] The method for adjusting the wall temperature deviation of the heating surface of the counter-fired boiler of the present invention comprises the following steps:

[0017] The temperature acquisition module detects the temperature at different measuring points on the left and right sides of the first-level heating surface, the temperature at different measuring points on the left and right sides of the second-level heating surface, and the temperature at different measuring points on the left and right sides of the third-level heating surface;

[0018] Calculate the average temperature of the primary heating surface based on the temperatures at different measuring points on the left and right sides of the primary heating surface;

[0019] Calculate the average temperature of the secondary heating surface based on the temperatures at different measuring points on the left and right sides of the secondary heating surface;

[0020] Calculate the average temperature of the three-stage heating surface according to the temperatures at different measuring points on the left and right sides of the three-stage heating surface;

[0021] Determine a first temperature difference between the temperature at each measuring point on the left and right sides of the primary heating surface and the average temperature of the primary heating surface, and when the first temperature difference is greater than a first preset temperature threshold, spray a high-temperature flue gas into the measuring point with the highest temperature on the primary heating surface through the primary high-temperature flue gas nozzle;

[0022] Determine a second temperature difference between the temperature at each measuring point on the left and right sides of the secondary heating surface and the average temperature of the secondary heating surface, and when the second temperature difference is greater than a second preset temperature threshold, spray a high-temperature flue gas into the measuring point with the highest temperature on the secondary heating surface through the secondary high-temperature flue gas nozzle;

[0023] Determine the third temperature difference between the temperature at each measuring point on the left and right sides of the tertiary heating surface and the average temperature of the tertiary heating surface. When the third temperature difference is greater than the third preset temperature threshold, high-temperature flue gas is sprayed into the measuring point with the highest temperature on the tertiary heating surface through the tertiary high-temperature flue gas nozzle.

[0024] The present invention has the following beneficial effects:

[0025] During specific operation, the system and method for regulating the wall temperature deviation of the heating surface of the counter-combustion boiler described in the present invention calculates the temperature difference between the average temperature of each stage of heating surfaces and the maximum temperature of each measuring point on the heating surface. When the temperature difference is greater than a preset threshold, a high-temperature flue gas is sprayed into the measuring point with the highest temperature, thereby quickly adjusting the flue gas temperature and flow rate near the location where the maximum wall temperature of each heating surface in the boiler occurs. This can quickly improve the wall temperature of each heating surface, avoid long-term high wall temperature at certain locations of the boiler heating surface, and extend the life of each stage of heating surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 It is a structural diagram of the present invention;

[0028] Figure 2 It is a side view of the present invention.

[0029] Among them, 1 is a screen superheater, 2 is a first-level high-temperature flue gas nozzle, 3 is a first-level high-temperature flue gas distribution box system, 4 is a second-level high-temperature flue gas nozzle, 5 is a second-level high-temperature flue gas distribution box system, 6 is a high-temperature superheater, 7 is a third-level high-temperature flue gas nozzle, 8 is a third-level high-temperature flue gas distribution box system, 9 is a reheater, 10 is a temperature-balanced flue gas regulating valve on the left side of the second-level high-temperature flue gas, 11 is a temperature-balanced flue gas regulating valve on the left side of the first-level high-temperature flue gas, 12 is a primary high-temperature flue gas intake port, 13 is a first-level temperature-balanced induced draft fan, 14 is a temperature-balanced flue gas regulating valve on the right side of the first-level high-temperature flue gas, 15 is a temperature-balanced flue gas regulating valve on the right side of the second-level high-temperature flue gas, 16 is a second-level high-temperature flue gas distribution box on the left, 17 is a second-level high-temperature flue gas distribution box on the right, 18 is a first-level high-temperature flue gas distribution box on the right, and 19 is a first-level high-temperature flue gas distribution box on the left. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] refer to Figure 1 and Figure 2 The wall temperature deviation regulation system of the counter-combustion boiler heating surface of the present invention comprises a primary high-temperature flue gas distribution box system 3, a secondary high-temperature flue gas distribution box system 5, and a tertiary high-temperature flue gas distribution box system 8; a primary heating surface, a screen superheater 1, a secondary heating surface, a high-temperature superheater 6, a tertiary heating surface and a reheater 9 are sequentially arranged in the tail flue of the boiler furnace along the flue gas flow direction.

[0039] The first-level high-temperature smoke distribution box system 3 includes a first-level high-temperature smoke distribution box 19 on the left and a first-level high-temperature smoke distribution box 18 on the right, and a plurality of first-level high-temperature smoke nozzles 2 are arranged in the first-level high-temperature smoke distribution box 19 on the left and the first-level high-temperature smoke distribution box 18 on the right. The second-level high-temperature smoke distribution box system 5 includes a second-level high-temperature smoke distribution box 16 on the left and a second-level high-temperature smoke distribution box 17 on the right, and a plurality of second-level high-temperature smoke nozzles 4 are arranged in the second-level high-temperature smoke distribution box 16 on the left and the second-level high-temperature smoke distribution box 17 on the right; the third-level high-temperature smoke distribution box system 8 includes a third-level high-temperature smoke distribution box on the left and a third-level high-temperature smoke distribution box on the right. A number of three-stage high-temperature flue gas nozzles 7 are arranged in the box and in the three-stage high-temperature flue gas distribution box on the right; the first-stage high-temperature flue gas nozzle 2 in the first-stage high-temperature flue gas distribution box 19 on the left is facing the left side of the first-stage heating surface; the first-stage high-temperature flue gas nozzle 2 in the first-stage high-temperature flue gas distribution box 18 on the right is facing the right side of the first-stage heating surface; the second-stage high-temperature flue gas nozzle 4 in the second-stage high-temperature flue gas distribution box 16 on the left is facing the left side of the second-stage heating surface; the second-stage high-temperature flue gas nozzle 4 in the second-stage high-temperature flue gas distribution box 17 on the right is facing the right side of the second-stage heating surface; the third-stage high-temperature flue gas nozzle 7 in the three-stage high-temperature flue gas distribution box on the left is facing the left side of the three-stage heating surface; the third-stage high-temperature flue gas nozzle 7 in the three-stage high-temperature flue gas distribution box on the right is facing the right side of the three-stage heating surface.

[0040] A primary high-temperature flue gas inlet 12 is arranged on the flue at the rear of the boiler heating surface, and the primary high-temperature flue gas inlet 12 is connected with the inlet of the first-stage temperature-balanced induced draft fan 13, the inlet of the second-stage temperature-balanced induced draft fan and the inlet of the third-stage temperature-balanced induced draft fan. The outlet of the first-stage temperature-balanced induced draft fan 13 is connected with the first-stage high-temperature flue gas nozzle 2 in the left-stage high-temperature flue gas distribution box 19 through the first-stage high-temperature flue gas left-side temperature-balanced flue gas regulating valve 11; the outlet of the first-stage temperature-balanced induced draft fan 13 is connected with the first-stage high-temperature flue gas nozzle 2 in the right-stage high-temperature flue gas distribution box 18 through the first-stage high-temperature flue gas right-side temperature-balanced flue gas regulating valve 14.

[0041] The outlet of the secondary temperature-balancing induced draft fan is connected to the secondary high-temperature smoke nozzle 4 in the left secondary high-temperature smoke distribution box 16 through the left-side temperature-balancing smoke gas regulating valve 10 of the secondary high-temperature smoke; the outlet of the secondary temperature-balancing induced draft fan is connected to the secondary high-temperature smoke nozzle 4 in the right-side secondary high-temperature smoke distribution box 17 through the right-side temperature-balancing smoke gas regulating valve 15 of the secondary high-temperature smoke.

[0042] The outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle 7 in the left three-stage high-temperature flue gas distribution box via the left-side temperature-balanced flue gas regulating valve of the three-stage high-temperature flue gas; the outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle 7 in the right three-stage high-temperature flue gas distribution box via the right-side temperature-balanced flue gas regulating valve of the three-stage high-temperature flue gas.

[0043] As an embodiment of the present invention, the positions of the first-stage high-temperature flue gas nozzle 2, the second-stage high-temperature flue gas nozzle 4 and the third-stage high-temperature flue gas nozzle 7 are adjustable.

[0044] During operation, the temperature acquisition module is used to obtain the average wall temperature of each level of heating surface, and at the same time, the maximum temperature value of each level of heating surface and its location are determined; according to the difference between the maximum temperature of each heating surface and its average wall temperature, the injected flue gas flow rate and injection position are controlled.

[0045] The working principle of the present invention is:

[0046] A primary high-temperature flue gas inlet 12 is arranged in the flue behind the heating surface of the boiler, a high-temperature flue gas nozzle is arranged in the flue in front of the heating surface, and a temperature-balanced induced draft fan, temperature-balanced flue gas regulating valves on the left and right sides, and a high-temperature flue gas distribution box are arranged in the temperature-balanced flue. A high-temperature flue gas nozzle with adjustable depth into the furnace is also arranged in the high-temperature flue gas distribution box. The temperature measurement values ​​of the boiler heating surface are read in real time from the boiler control DCS system, the average temperature of each level of heating surface is calculated respectively, and the maximum temperature value of each level of heating surface is obtained, and the temperature difference between the maximum temperature value of each heating surface and its average temperature is calculated. When the temperature difference is greater than 15°C on one side, the temperature-balanced induced draft fan is started, and the temperature-balanced flue gas regulating valve on that side is opened. When the temperature difference is greater than 15°C on both sides, the temperature-balanced induced draft fan is started, and the temperature-balanced flue gas regulating valves on the left and right sides are opened. The system is also provided with a judgment control module for judging the difference between the maximum temperature of the left and right heating surfaces and the average temperature, controlling the flow of the temperature-balanced flue gas regulating valve, and controlling the distance of the high-temperature flue gas nozzle extending into the furnace according to the position where the maximum wall temperature of the left and right heating surfaces of each level appears. It should be noted that the present invention can timely and quickly adjust the flue gas temperature and flow rate near the position where the maximum wall temperature of each heating surface in the boiler appears, can quickly improve the wall temperature of each heating surface, avoid long-term high wall temperature at certain positions of the heating surface of the boiler, and extend the life of each level of heating surface.

[0047] In summary, the present invention can timely and quickly adjust the flue gas temperature and flow rate near the location where the maximum wall temperature of each heating surface in the boiler occurs, can quickly improve the wall temperature of each heating surface, avoid long-term high wall temperature at certain locations of the boiler heating surface, and extend the life of each level of heating surface.

[0048] Embodiment 2

[0049] The method for adjusting the wall temperature deviation of the heating surface of the counter-fired boiler of the present invention comprises the following steps:

[0050] The temperature acquisition module detects the temperature at different measuring points on the left and right sides of the first-level heating surface, the temperature at different measuring points on the left and right sides of the second-level heating surface, and the temperature at different measuring points on the left and right sides of the third-level heating surface;

[0051] Calculate the average temperature of the primary heating surface based on the temperatures at different measuring points on the left and right sides of the primary heating surface;

[0052] Calculate the average temperature of the secondary heating surface based on the temperatures at different measuring points on the left and right sides of the secondary heating surface;

[0053] Calculate the average temperature of the three-stage heating surface according to the temperatures at different measuring points on the left and right sides of the three-stage heating surface;

[0054] Determine a first temperature difference between the temperature at each measuring point on the left and right sides of the primary heating surface and the average temperature of the primary heating surface. When the first temperature difference is greater than a first preset temperature threshold, spray a high-temperature flue gas into the measuring point with the highest temperature on the primary heating surface through the primary high-temperature flue gas nozzle 2;

[0055] Determine the second temperature difference between the temperature at each measuring point on the left and right sides of the secondary heating surface and the average temperature of the secondary heating surface. When the second temperature difference is greater than the second preset temperature threshold, spray the primary high-temperature flue gas into the measuring point with the highest temperature on the secondary heating surface through the secondary high-temperature flue gas nozzle 4;

[0056] The third temperature difference between the temperature at each measuring point on the left and right sides of the tertiary heating surface and the average temperature of the tertiary heating surface is determined. When the third temperature difference is greater than the third preset temperature threshold, high-temperature flue gas is sprayed into the measuring point with the highest temperature on the tertiary heating surface through the tertiary high-temperature flue gas nozzle 7.

[0057] Embodiment 3

[0058] A computer device includes 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 method for adjusting the wall temperature deviation of the heating surface of the counter-combustion boiler are implemented. 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. The internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard structure bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0059] Embodiment 4

[0060] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for adjusting the wall temperature deviation of the heating surface of the counter-fired boiler are implemented. Specifically, the computer-readable storage medium includes, but is not limited to, for example, a volatile memory and / or a non-volatile memory. The volatile memory may include a random access memory (RAM) and / or a cache memory, etc. The non-volatile memory may include a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.

[0061] 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 include computer-usable program code.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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 system for regulating the wall temperature deviation of a heating surface of an opposed combustion boiler, characterized in that: The invention comprises a primary high-temperature flue gas distribution box system (3), a secondary high-temperature flue gas distribution box system (5), and a tertiary high-temperature flue gas distribution box system (8); a primary heating surface, a secondary heating surface, and a tertiary heating surface are sequentially arranged on the tail flue of the boiler furnace along the flue gas flow direction; a temperature acquisition module for detecting the temperature at different measuring points on the left and right sides of the primary heating surface, the temperature at different measuring points on the left and right sides of the secondary heating surface, and the temperature at different measuring points on the left and right sides of the tertiary heating surface is arranged in the tail flue of the boiler furnace; A plurality of first-level high-temperature flue gas nozzles (2) are arranged in the first-level high-temperature flue gas distribution box system (3), a plurality of second-level high-temperature flue gas nozzles (4) are arranged in the second-level high-temperature flue gas distribution box system (5), and a third-level high-temperature flue gas nozzle (7) is arranged in the third-level high-temperature flue gas distribution box system (8). Each first-level high-temperature flue gas nozzle (2) faces the left and right sides of the first-level heating surface, each second-level high-temperature flue gas nozzle (4) faces the left and right sides of the second-level heating surface, and each third-level high-temperature flue gas nozzle (7) faces the left and right sides of the third-level heating surface. A first-level high-temperature flue gas inlet (12) is arranged on the flue at the rear of the boiler heating surface. The first-level high-temperature flue gas inlet (12) is respectively connected to the first-level high-temperature flue gas nozzle (2), the second-level high-temperature flue gas nozzle (4) and the third-level high-temperature flue gas nozzle (7).

2. The system for regulating the wall temperature deviation of the heating surface of the opposed-firing boiler according to claim 1 is characterized in that: The first-level high-temperature flue gas distribution box system (3) comprises a left-side first-level high-temperature flue gas distribution box (19) and a right-side first-level high-temperature flue gas distribution box (18), and a plurality of first-level high-temperature flue gas nozzles (2) are arranged in the left-side first-level high-temperature flue gas distribution box (19) and the right-side first-level high-temperature flue gas distribution box (18). The first-level high-temperature flue gas nozzles (2) in the left-side first-level high-temperature flue gas distribution box (19) face the left side of the first-level heating surface; and the first-level high-temperature flue gas nozzles (2) in the right-side first-level high-temperature flue gas distribution box (18) face the right side of the first-level heating surface.

3. The system for regulating the heating surface temperature deviation of an opposed-firing boiler according to claim 1 is characterized in that: The secondary high-temperature flue gas distribution box system (5) comprises a left secondary high-temperature flue gas distribution box (16) and a right secondary high-temperature flue gas distribution box (17). A plurality of secondary high-temperature flue gas nozzles (4) are arranged in the left secondary high-temperature flue gas distribution box (16) and the right secondary high-temperature flue gas distribution box (17). The secondary high-temperature flue gas nozzles (4) in the left secondary high-temperature flue gas distribution box (16) face the left side of the secondary heating surface; and the secondary high-temperature flue gas nozzles (4) in the right secondary high-temperature flue gas distribution box (17) face the right side of the secondary heating surface.

4. The system for regulating the wall temperature deviation of the heating surface of the opposed-firing boiler according to claim 1 is characterized in that: The three-stage high-temperature flue gas distribution box system (8) comprises a left-side three-stage high-temperature flue gas distribution box and a right-side three-stage high-temperature flue gas distribution box. A plurality of three-stage high-temperature flue gas nozzles (7) are arranged in the left-side three-stage high-temperature flue gas distribution box and the right-side three-stage high-temperature flue gas distribution box. The three-stage high-temperature flue gas nozzles (7) in the left-side three-stage high-temperature flue gas distribution box face the left side of the three-stage heating surface, and the three-stage high-temperature flue gas nozzles (7) in the right-side three-stage high-temperature flue gas distribution box face the right side of the three-stage heating surface.

5. The system for regulating the heating surface temperature deviation of an opposed-firing boiler according to claim 1 is characterized in that: It also includes a primary temperature-balanced induced draft fan (13), a secondary temperature-balanced induced draft fan, and a tertiary temperature-balanced induced draft fan, wherein the primary high-temperature smoke inlet (12) is connected to the inlet of the primary temperature-balanced induced draft fan (13), the inlet of the secondary temperature-balanced induced draft fan, and the inlet of the tertiary temperature-balanced induced draft fan, and the outlet of the primary temperature-balanced induced draft fan (13) is connected to the primary high-temperature smoke outlet (2) in the primary high-temperature smoke distribution box (19) on the left; and the outlet of the primary temperature-balanced induced draft fan (13) is connected to the primary high-temperature smoke outlet (2) in the primary high-temperature smoke distribution box (18) on the right; The outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature flue gas outlet (4) in the left secondary high-temperature flue gas distribution box (16); the outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature flue gas outlet (4) in the right secondary high-temperature flue gas distribution box (17); The outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle (7) in the three-stage high-temperature flue gas distribution box on the left; the outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle (7) in the three-stage high-temperature flue gas distribution box on the right.

6. The system for regulating the heating surface temperature deviation of the opposed-firing boiler according to claim 5 is characterized in that: The outlet of the primary temperature-balanced induced draft fan (13) is connected to the primary high-temperature flue gas outlet (2) in the left primary high-temperature flue gas distribution box (19) via the primary high-temperature flue gas left temperature-balanced flue gas regulating valve (11); the outlet of the primary temperature-balanced induced draft fan (13) is connected to the primary high-temperature flue gas outlet (2) in the right primary high-temperature flue gas distribution box (18) via the primary high-temperature flue gas right temperature-balanced flue gas regulating valve (14).

7. The system for regulating the heating surface temperature deviation of an opposed-firing boiler according to claim 5, characterized in that: The outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature flue gas nozzle (4) in the left secondary high-temperature flue gas distribution box (16) via the left secondary high-temperature flue gas temperature-balanced flue gas regulating valve (10); the outlet of the secondary temperature-balanced induced draft fan is connected to the secondary high-temperature flue gas nozzle (4) in the right secondary high-temperature flue gas distribution box (17) via the right secondary high-temperature flue gas temperature-balanced flue gas regulating valve (15).

8. The system for regulating the heating surface temperature deviation of an opposed-firing boiler according to claim 5, characterized in that: The outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle (7) in the left three-stage high-temperature flue gas distribution box via the left temperature-balanced flue gas regulating valve of the three-stage high-temperature flue gas; the outlet of the three-stage temperature-balanced induced draft fan is connected to the three-stage high-temperature flue gas nozzle (7) in the right three-stage high-temperature flue gas distribution box via the right temperature-balanced flue gas regulating valve of the three-stage high-temperature flue gas.

9. The system for regulating the heating surface temperature deviation of an opposed-firing boiler according to claim 1, characterized in that: The positions of the first-level high-temperature smoke nozzle (2), the second-level high-temperature smoke nozzle (4) and the third-level high-temperature smoke nozzle (7) are adjustable.

10. A method for adjusting the wall temperature deviation of a heating surface of a counter-firing boiler, characterized in that: The system for regulating the wall temperature deviation of the heating surface of the counter-firing boiler according to claim 1 comprises the following steps: The temperature acquisition module detects the temperature at different measuring points on the left and right sides of the first-level heating surface, the temperature at different measuring points on the left and right sides of the second-level heating surface, and the temperature at different measuring points on the left and right sides of the third-level heating surface; Calculate the average temperature of the primary heating surface based on the temperatures at different measuring points on the left and right sides of the primary heating surface; Calculate the average temperature of the secondary heating surface based on the temperatures at different measuring points on the left and right sides of the secondary heating surface; Calculate the average temperature of the three-stage heating surface according to the temperatures at different measuring points on the left and right sides of the three-stage heating surface; Determine a first temperature difference between the temperature at each measuring point on the left and right sides of the primary heating surface and the average temperature of the primary heating surface, and when the first temperature difference is greater than a first preset temperature threshold, spray a high-temperature flue gas through a primary high-temperature flue gas nozzle (2) into the measuring point with the highest temperature on the primary heating surface; Determine a second temperature difference between the temperature at each measuring point on the left and right sides of the secondary heating surface and the average temperature of the secondary heating surface, and when the second temperature difference is greater than a second preset temperature threshold, spray a primary high-temperature flue gas through the secondary high-temperature flue gas nozzle (4) into the measuring point with the highest temperature on the secondary heating surface; A third temperature difference between the temperature at each measuring point on the left and right sides of the third-level heating surface and the average temperature of the third-level heating surface is determined. When the third temperature difference is greater than a third preset temperature threshold, a high-temperature flue gas is sprayed into the measuring point with the highest temperature on the third-level heating surface through the third-level high-temperature flue gas nozzle (7).

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