Coal quantity change analysis method and system of industrial steam supply waste heat utilization back pressure machine

Abstract

The invention discloses a coal quantity change analysis method and system of an industrial steam supply waste heat utilization back pressure machine, and belongs to the technical field of energy-saving analysis. The method comprises the steps that on the basis of the condition that the on-grid electricity quantity and the external heat supply quantity of a unit are not changed, through variable working condition calculation of the thermal performance of a steam turbine, the total heat consumption and total coal consumption changes of the unit used for power generation and heat supply before and after transformation of the industrial steam supply waste heat utilization back pressure turbine are analyzed; and carrying out difference calculation and analysis on the total coal consumption variation of units with different capacities and different heat supply modes of the whole plant. According to the method, the quantitative influence of each factor on the total coal quantity change of the unit before and after transformation is integrated, the energy conservation and emission reduction effect of the industrial steam supply waste heat utilization back pressure turbine technology can be analyzed more accurately, the actual carbon emission condition of the unit after transformation is evaluated, the carbon emission management of the unit is promoted to be more accurate, and an emission reduction plan is formulated more scientifically.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving analysis, and in particular to a method, system, equipment, medium and program for analyzing changes in coal quantity of an industrial steam supply waste heat utilization back pressure machine. Background Art

[0002] The pressure and temperature of the steam that can be extracted in the design and manufacture of the flow of the existing units are a set of related parameters, while the temperature and pressure of the heating demand are determined by the user's process, which results in the phenomenon of mismatch between supply and demand parameters. In order to meet the needs of high-parameter heat users, steam with higher pressure or temperature grades is generally used to reduce temperature and pressure before heating. The heating of high-grade steam with reduced temperature and pressure violates the energy use principle of "temperature matching and cascade utilization" and has poor economic efficiency. In order to improve energy utilization efficiency, back pressure machines are often used instead of direct cooling and pressure reduction methods to recover the steam part of the work capacity, realize the cascade utilization of energy, and connect the back pressure generator to the plant power system. Since the reconstruction project of adding back pressure machines includes the back pressure steam turbine generator set body, shaft seal system, drainage water system, oil system and auxiliary machine cooling water system, etc., the investment amount of the reconstruction project is relatively large, so the energy saving and emission reduction effect of the back pressure machine reconstruction project for the utilization of waste heat from industrial steam supply needs to be calculated in detail.

[0003] According to the traditional analysis method of benefit attribution to electricity, after the steam supply waste heat utilization back pressure machine transformation, the unit's steam supply capacity and power generation capacity remain unchanged, the unit's power consumption is reduced, and the actual grid settlement power is increased. The economic benefits after the transformation are mainly the benefits brought by the increase in actual grid power.

[0004] In fact, the unit's online power consumption remains unchanged throughout the year. After the implementation of the back pressure machine transformation to utilize the waste heat from steam supply, the unit's plant power consumption is reduced and the output power of the steam turbine generator is reduced. The economic benefits after the transformation are mainly the reduction in the unit's coal consumption for power generation due to the reduction in plant power consumption, which saves combustion costs and reduces carbon emissions at the same time. Summary of the invention

[0005] The present invention provides a method for analyzing changes in the coal quantity of an industrial steam supply waste heat utilization back pressure machine, which can comprehensively analyze the quantitative influence of various factors on the changes in the total coal quantity of the unit before and after the transformation, and can more accurately analyze the energy-saving and emission reduction effects of the industrial steam supply waste heat utilization back pressure machine technology, evaluate the actual carbon emissions of the unit after the transformation, and promote more accurate carbon emission management of the unit and more scientific formulation of emission reduction plans.

[0006] In order to achieve the above object, the present invention provides the following technical solutions.

[0007] In a first aspect, the present invention provides a method for analyzing the change of coal quantity of an industrial steam supply waste heat utilization back pressure machine, comprising: Calculate the variable working condition according to the total coal volume of the unit, and analyze the total heat consumption of the unit after the industrial steam supply waste heat utilization back pressure machine is transformed under each benchmark heating condition; The total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under each benchmark heating condition is compared with the total heat consumption of the unit before the transformation to obtain the annual change in the total coal consumption of the unit; Perform differential calculation and analysis on the annual changes in total coal consumption of the units.

[0008] As a further improvement of the present invention, obtaining the total coal quantity of the unit under several unit loads includes: Collect the required annual unit operating load data and industrial steam supply data, and determine the typical operating condition points based on the annual distribution patterns of the electrical load and thermal load of several units, as the calculation benchmark heating condition; The steam turbine performance test and boiler performance test are carried out under the benchmark heating condition to obtain the total coal quantity of the unit under different heating flow rates and different unit loads.

[0009] As a further improvement of the present invention, the variable operating condition calculation is performed according to the total coal quantity of the unit, and the total heat consumption of the unit after the industrial steam supply waste heat is transformed by the back pressure machine under each benchmark heating condition is analyzed, including: According to the total coal volume of the unit under different heating flow rates and different unit loads, the simulation model is used to perform variable operating condition calculations, and the effects of changes in the amount of heating and cooling water and changes in the amount of steam extraction on the total heat consumption of the unit after the back pressure machine for industrial steam waste heat utilization is transformed under various benchmark heating conditions are analyzed.

[0010] As a further improvement of the present invention, the selection parameters of the industrial steam supply waste heat utilization back pressure machine are determined according to the heat load distribution law of the whole plant, including the rated operating steam inlet flow rate and pressure, temperature, the maximum steam inlet flow rate and pressure, temperature, the minimum steam inlet flow rate and shaft seal steam consumption.

[0011] As a further improvement of the present invention, the total heat consumption of the unit after the industrial steam waste heat back pressure machine is transformed under the said reference heating conditions is compared with the total heat consumption of the unit before the transformation to obtain the annual total coal consumption change of the unit, including: The total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under each benchmark heating condition is compared with the total heat consumption of the unit before the transformation; Obtain the total coal consumption per hour of the unit before and after the transformation of the industrial steam waste heat utilization back pressure machine under each benchmark heating condition; Based on the annual distribution patterns of electrical load and thermal load under typical operating conditions and the annual operating hours of the back pressure machine, the annual change in total coal consumption is calculated.

[0012] As a further improvement of the present invention, the difference calculation and analysis of the change in the total coal consumption of the unit each year is performed, and then, based on the analysis results, the fuel saving cost data is obtained.

[0013] In a second aspect, the present invention provides a coal quantity change analysis system for an industrial steam supply waste heat utilization back pressure machine, comprising: Energy consumption analysis module: used to calculate variable operating conditions according to the total coal volume of the unit, and analyze the total heat consumption of the unit after the industrial steam supply waste heat is transformed into a back pressure machine under various benchmark heating conditions; Comparative energy consumption module: used to compare the total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under each benchmark heating condition with the total heat consumption of the unit before the transformation, and obtain the annual change in the total coal consumption of the unit; Calculation and analysis module: used to perform differential calculation and analysis on the annual changes in the total coal consumption of the unit.

[0014] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of a method for analyzing changes in coal quantity of an industrial steam supply waste heat utilization back pressure machine when executing the computer program.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of a method for analyzing changes in coal quantity of an industrial steam supply waste heat utilization back pressure machine.

[0016] In a fifth aspect, the present invention provides a computer program product, characterized in that it includes computer instructions, which, when executed by a processor, implement the steps of a method for analyzing changes in coal quantity of an industrial steam supply waste heat utilization back pressure machine.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention calculates according to the unit's variable operating conditions, analyzes the total heat consumption of the unit after the industrial steam waste heat utilization back pressure machine is transformed under each benchmark heating condition, and can accurately calculate the heat consumption reduction brought about by the transformation, so as to accurately evaluate the actual effect of energy conservation and emission reduction. This provides data support for formulating a more scientific and reasonable energy conservation and emission reduction strategy. Comparing the total heat consumption of the unit before and after the transformation, calculating the change in the total coal consumption each year, and further performing differential calculation and analysis, it is helpful to comprehensively evaluate the economy and feasibility of the transformation project. This refined economic analysis can effectively control the transformation cost while ensuring the energy conservation and emission reduction effect, avoiding high initial investment and unnecessary waste of resources. In addition, the present invention not only focuses on the direct economic benefits of the transformation project, but also optimizes the overall operation strategy through a comprehensive analysis of the economy of the whole plant. By means of reasonable allocation of resources, optimization of production processes and other means, the operating efficiency and market competitiveness of the whole plant can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. In the drawings: Figure 1 It is a flow chart of a method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply according to the present invention; Figure 2 It is a structural schematic diagram of a coal quantity variation analysis system of an industrial steam supply waste heat utilization back pressure machine of the present invention; Figure 3 The electronic device schematic diagram of the present invention is a method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Aiming at the high transformation cost and aggravated carbon emission problems of industrial steam supply waste heat utilization back pressure machine in the prior art to reduce the power consumption of the unit plant. The present invention provides a method for analyzing the coal quantity change of industrial steam supply waste heat utilization back pressure machine, such as Figure 1 As shown, the method includes: S101: Calculate the variable operating conditions according to the total coal volume of the unit, and analyze the total heat consumption of the unit after the industrial steam supply waste heat utilization back pressure machine is transformed under each benchmark heating condition; S201: Compare the total heat consumption of the unit after the industrial steam waste heat back pressure machine is transformed under each benchmark heating condition with the total heat consumption of the unit before the transformation to obtain the annual total coal consumption change of the unit; S301: Perform differential calculation and analysis on the annual changes in total coal consumption of the units.

[0022] The present invention uses the coal quantity change analysis method of the back pressure machine technology for industrial steam supply waste heat utilization to accurately calculate the heat consumption reduction brought about by the transformation, thereby accurately evaluating the actual effect of energy conservation and emission reduction. This provides data support for formulating more scientific and reasonable energy conservation and emission reduction strategies, and helps to comprehensively evaluate the economy and feasibility of the transformation project.

[0023] The present invention is further explained below.

[0024] The implementation steps of the coal quantity change analysis method of the industrial steam supply waste heat utilization back pressure machine of the present invention are as follows: S1: Collect statistics on unit operating load data and industrial steam supply data in recent years, and determine the typical operating condition point as the calculation benchmark heating condition based on the annual distribution pattern of each unit's electrical load and thermal load.

[0025] S2: Carry out turbine performance test and boiler performance test under various benchmark heating conditions, and calculate the total coal consumption of the unit (including power generation coal consumption and heating coal consumption).

[0026] The total heat consumption of the unit includes the total heat absorption of steam and water working fluids entering and leaving the boiler system, such as feed water to main steam, high exhaust steam to reheat steam, reheat desuperheating water to reheat steam, feed water to boiler side extraction steam for heating, without deducting the heat of steam extraction steam for heating on the turbine side. Combined with the synchronously measured boiler efficiency, the total coal consumption of the unit (including power generation coal consumption and heating coal consumption) under different heating flow rates and different unit loads is finally obtained.

[0027] S3: According to the heat load distribution law of the whole plant, determine the selection parameters of the industrial steam supply waste heat utilization back pressure machine, including the rated operating steam inlet flow rate and pressure, temperature, maximum steam inlet flow rate and pressure, temperature, minimum steam inlet flow rate, etc., and also include the steam consumption for shaft seal.

[0028] S4: Based on the performance test data in S2, the EBSILON thermal system simulation model is built to perform variable operating condition calculations, and the influence of changes in heating and cooling water volume and unit steam extraction volume (including heating extraction volume and back pressure machine shaft seal steam volume) on the total heat consumption of the unit after the industrial steam waste heat utilization back pressure machine transformation under various benchmark heating conditions is analyzed. The total heat consumption calculation formula of the unit does not deduct the heat of the heating extraction steam on the steam turbine side, which can reflect the actual coal consumption changes of the boiler.

[0029] S5: Based on S2 and S4, the hourly total coal consumption changes of the units before and after the transformation of the industrial steam supply waste heat utilization back pressure machine under each benchmark heating condition are obtained. Combined with the distribution patterns of the electric load and thermal load in the typical operating conditions throughout the year and the annual operating hours of the back pressure machine, the annual total coal consumption changes are calculated. Then, based on the standard coal prices and carbon emission reduction benefits in recent years, the annual fuel cost savings and carbon emission reduction benefits are obtained, which are the energy-saving and emission reduction effects of the industrial steam supply waste heat utilization back pressure machine technology and the actual economic benefits of the transformation project.

[0030] S6: For different power plants with different industrial heat loads and different unit capacity levels within the plant, from the perspective of meeting the power generation and heating needs of the entire plant, the steam source for the back pressure machine for steam waste heat utilization may be a single unit, two units of the same model, or several units of different capacity levels. In the case where the heating desuperheater and pressure reducer of multiple units are replaced by the back pressure machine at the same time, the heating desuperheater water and the steam extraction volume of each unit will change; however, the change in the unit's power generation and the change in the amount of coal consumed by the plant's power consumption only occur in a certain unit where the back pressure generator is connected to the plant's power consumption, that is, it is necessary to perform differential analysis and calculation based on the thermal load of the entire plant, the number of heating units, and the model and number of back pressure machines.

[0031] The present invention is further described in detail below by way of examples.

[0032] Example A power plant has two 600MW supercritical units and two 1000MW ultra-supercritical units. All four units in the plant extract steam from the boiler body and supply heat to the outside at the same time after temperature reduction and pressure reduction. In order to reduce the energy loss in the temperature reduction and pressure reduction process and improve the energy efficiency of the current industrial steam supply system, it is planned to add a back pressure machine for cascade utilization of industrial steam waste heat. The selection parameters of the back pressure machine are determined according to the distribution law of the heat load of the whole plant throughout the year, with the annual average heat flow rate as the rated working condition, while trying to take into account the high load of winter heating and the low load of night heating. The back pressure machine is connected to the 6kV plant power system of a unit.

[0033] According to the annual distribution of the electric load and heat load of the four units in the plant, the operating conditions of three typical electric loads and two heat loads (annual average heating supply and winter average heating supply) were combined as the calculation benchmark heating conditions. Through field tests and variable condition calculations of the EBSILON thermal system simulation model, under the premise that the online power and external heat supply remain unchanged, the influence of changes in the heating and cooling water volume, the steam consumption of the back pressure machine shaft seal, the unit steam extraction volume, the plant power consumption, and the unit power generation on the total coal consumption before and after the transformation was comprehensively considered, and the actual economic benefits of the industrial steam supply waste heat cascade utilization back pressure machine transformation project were obtained, that is, compared with the original cooling and pressure reduction method, the fuel cost is saved by 6.525 million yuan per year.

[0034] According to the traditional analysis method of benefit attribution to electricity, after the steam supply waste heat utilization back pressure machine transformation, the unit's steam supply capacity and power generation capacity remain unchanged, the unit's power consumption is reduced, and the actual grid settlement power is increased. The economic benefits after the transformation are mainly the benefits brought by the increase in actual grid power. Compared with the original temperature and pressure reduction method, the fuel cost increases by 5.587 million yuan per year, the power saving benefit is 12.814 million yuan per year, and the net benefit is 7.227 million yuan per year.

[0035] Therefore, by adopting the calculation method of the present invention, the actual economic benefits of the industrial steam supply waste heat utilization back pressure machine reconstruction project can be analyzed more finely and accurately.

[0036] The second object of the present invention is to provide a coal quantity change analysis system for an industrial steam supply waste heat utilization back pressure machine, such as Figure 2 As shown, including: Energy consumption analysis module 102: used to perform variable operating condition calculations based on the total coal volume of the unit, and analyze the total heat consumption of the unit after the industrial steam supply waste heat is transformed into a back pressure machine under each benchmark heating condition; Energy consumption comparison module 202: used to compare the total heat consumption of the unit after the industrial steam waste heat back pressure machine is transformed under each benchmark heating condition with the total heat consumption of the unit before the transformation, so as to obtain the annual total coal consumption change of the unit; Calculation and analysis module 302: used to perform differential calculation and analysis on the annual change in total coal consumption of the unit.

[0037] like Figure 3 As shown, the third object of the present invention is to provide an electronic device, the electronic device comprising: a processor 501, a memory 502 and a display screen 503. Among them, the memory 502 and the display screen 503 are connected to the processor 501, such as through a bus 504. Optionally, the electronic device may also include a transceiver 505. It should be noted that in actual applications, the transceiver 505 is not limited to one, and the structure of the electronic device does not constitute a limitation on the embodiments of the present application.

[0038] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. Processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0039] The bus 504 may include a path to transmit information between the above components. The bus 504 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 504 may be divided into an address bus, a data bus, a control bus, etc.

[0040] The memory 502 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0041] The memory 502 is used to store application code for executing the solution of the present application, and the execution is controlled by the processor 501. The processor 501 is used to execute the application code stored in the memory 502 to implement the contents shown in the above method embodiment.

[0042] Figure 3 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0043] The fourth object of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program is stored thereon, and when the program is executed by a processor, the aforementioned Figure 1 The various processes of the method embodiment shown in the figure include, for example, a memory including instructions, and the instructions can be executed by a processor of an electronic device to complete the method.

[0044] A computer-readable storage medium may be a tangible device that holds and stores instructions used by an instruction execution device. A computer-readable storage medium may be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. Specifically, a computer-readable storage medium may be a portable computer disk, a hard disk, a USB flash drive, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a lectern random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, an optical disk, a magnetic disk, a mechanical encoding device, and any combination thereof.

[0045] A fifth object of the present invention is to provide a computer program product, comprising computer instructions, which, when executed by a processor, implement the above Figure 1 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0046] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0047] The above content is a further detailed description of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims

1. A method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply, characterized in that: include: Calculate the variable working condition according to the total coal volume of the unit, and analyze the total heat consumption of the unit after the industrial steam supply waste heat utilization back pressure machine is transformed under each benchmark heating condition; The total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under each benchmark heating condition is compared with the total heat consumption of the unit before the transformation to obtain the annual change in the total coal consumption of the unit; Perform differential calculation and analysis on the annual changes in total coal consumption of the units.

2. The method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply according to claim 1 is characterized in that: Obtain the total coal quantity of the unit under several unit loads, including: Collect the required annual unit operating load data and industrial steam supply data, and determine the typical operating condition points based on the annual distribution patterns of the electrical load and thermal load of several units, as the calculation benchmark heating condition; The steam turbine performance test and boiler performance test are carried out under the benchmark heating condition to obtain the total coal quantity of the unit under different heating flow rates and different unit loads.

3. The method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply according to claim 1 is characterized in that: The above-mentioned variable operating condition calculation is performed based on the total coal volume of the unit, and the total heat consumption of the unit after the industrial steam supply waste heat utilization back pressure machine is transformed under each benchmark heating condition is analyzed, including: According to the total coal volume of the unit under different heating flow rates and different unit loads, the simulation model is used to perform variable operating condition calculations, and the effects of changes in the amount of heating and cooling water and changes in the amount of steam extraction on the total heat consumption of the unit after the back pressure machine for industrial steam waste heat utilization is transformed under various benchmark heating conditions are analyzed.

4. The method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply according to claim 3 is characterized in that: The selection parameters of the industrial steam supply waste heat utilization back pressure machine are determined according to the heat load distribution law of the whole plant, including the rated operating steam inlet flow rate and pressure, temperature, the maximum steam inlet flow rate and pressure, temperature, the minimum steam inlet flow rate and shaft seal steam consumption.

5. The method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply according to claim 1 is characterized in that: The total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under the above-mentioned benchmark heating conditions is compared with the total heat consumption of the unit before the transformation to obtain the annual total coal consumption change of the unit, including: The total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under each benchmark heating condition is compared with the total heat consumption of the unit before the transformation; Obtain the total coal consumption per hour of the unit before and after the transformation of the industrial steam waste heat utilization back pressure machine under each benchmark heating condition; Based on the annual distribution patterns of electrical load and thermal load under typical operating conditions and the annual operating hours of the back pressure machine, the annual change in total coal consumption is calculated.

6. The method for analyzing the change of coal quantity of a back pressure machine for utilizing waste heat of industrial steam supply according to claim 1 is characterized in that: The difference calculation and analysis of the annual change in the total coal consumption of the unit is performed, and then, based on the analysis results, the fuel saving cost data is obtained.

7. A coal quantity change analysis system for industrial steam supply waste heat utilization back pressure machine, characterized in that: include: Energy consumption analysis module: used to calculate variable operating conditions according to the total coal volume of the unit, and analyze the total heat consumption of the unit after the industrial steam supply waste heat is transformed into a back pressure machine under various benchmark heating conditions; Comparative energy consumption module: used to compare the total heat consumption of the unit after the industrial steam waste heat back pressure machine transformation under each benchmark heating condition with the total heat consumption of the unit before the transformation, and obtain the annual change in the total coal consumption of the unit; Calculation and analysis module: used to perform differential calculation and analysis on the annual changes in the total coal consumption of the unit.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of a method for analyzing coal quantity changes of an industrial steam supply waste heat utilization back pressure machine as described in any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of a method for analyzing coal quantity changes in an industrial steam supply waste heat utilization back pressure machine as described in any one of claims 1 to 6.

10. A computer program product, characterized in that It comprises computer instructions, which, when executed by a processor, implement the steps of a method for analyzing coal quantity changes of an industrial steam supply waste heat utilization back pressure machine as described in any one of claims 1 to 6.

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