System and method for power generation by using organic solid waste instead of coal in combination with pulverized coal boiler

Abstract

The invention discloses a system and method for power generation by replacing coal with organic solid waste in combination with a pulverized coal boiler. The system comprises a boiler pulverizing system, a combustor, a combustion system, rotary equipment, a solid waste combustor, the pulverized coal boiler and a pulverized coal boiler combustor. An outlet of the boiler pulverizing system is connected with an inlet of the combustion system through the combustor, an outlet of the combustion system is connected with an inlet of the rotary device, an outlet of the rotary device is connected with an inlet of the solid waste combustor, and an outlet of the solid waste combustor is connected with a hearth of the pulverized coal boiler. An outlet of the organic solid waste storage and transportation system is connected with the rotary equipment; and a discharge port of the rotary equipment is connected with an inlet of the pulverized coal boiler burner, an outlet of the pulverized coal boiler burner is connected with the pulverized coal boiler, and the system and the method can utilize the organic solid waste to replace coal for power generation.

Description

Technical Field

[0001] The invention belongs to the technical field of organic solid waste replacing coal for power generation, and relates to a system and method for combining a pulverized coal boiler with organic solid waste to replace coal for power generation. Background Art

[0002] Coordinate the low-carbon transformation of existing coal-fired power units and the low-carbon construction of new coal-fired power units, improve the level of clean and efficient use of coal, and accelerate the construction of a new energy system that is clean, low-carbon, safe and efficient.

[0003] However, organic solid waste has complex physical and chemical properties and is difficult to adapt to suspended combustion in pulverized coal boilers, which is a technical bottleneck in the field of organic solid waste replacing coal in power generation. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a system and method for generating electricity by using organic solid waste instead of coal in a combined pulverized coal boiler. The system and method can generate electricity by using organic solid waste instead of coal.

[0005] To achieve the above-mentioned purpose, the present invention discloses a system for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler, comprising a boiler pulverizing system, a burner, a combustion system, a rotary device, a solid waste burner, a pulverized coal boiler and a pulverized coal boiler burner;

[0006] The outlet of the boiler pulverizing system is connected to the inlet of the combustion system through the burner, the outlet of the combustion system is connected to the inlet of the rotary equipment, the outlet of the rotary equipment is connected to the inlet of the solid waste burner, and the outlet of the solid waste burner is connected to the furnace of the pulverized coal boiler; the outlet of the organic solid waste storage and transportation system is connected to the rotary equipment; the discharge port of the rotary equipment is connected to the inlet of the pulverized coal boiler burner, and the outlet of the pulverized coal boiler burner is connected to the pulverized coal boiler.

[0007] As a further improvement of the system for generating electricity by using organic solid waste to replace coal in the combined pulverized coal boiler of the present invention, the following are the advantages:

[0008] Furthermore, the outlet of the boiler pulverizing system is connected to the inlet of the combustion system via a primary fan and a burner.

[0009] Furthermore, it also includes cooling equipment and crushing equipment. The discharge port of the rotary equipment is connected to the shell side inlet of the cooling equipment, the shell side outlet of the cooling equipment is connected to the inlet of the crushing equipment, and the outlet of the crushing equipment is connected to the inlet of the pulverized coal boiler burner.

[0010] Furthermore, it also includes a storage system and a pneumatic conveying system. The outlet of the crushing equipment is connected to the inlet of the storage system, the outlet of the storage system is connected to the inlet of the pneumatic conveying system, and the outlet of the pneumatic conveying system is connected to the inlet of the pulverized coal boiler burner.

[0011] Furthermore, it also includes a secondary fan, the outlet of the secondary fan is connected to the tube side inlet of the cooling device, and the tube side outlet of the cooling device is connected to the secondary air inlet of the burner.

[0012] Furthermore, it also includes a pulverized coal boiler tail pollutant removal system and a chimney, and the outlet of the pulverized coal boiler is connected to the inlet of the chimney through the pulverized coal boiler tail pollutant removal system.

[0013] The present invention discloses a method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler, comprising the following steps:

[0014] Primary air is drawn out from the primary air duct at the outlet of the boiler pulverizing system, and then enters the combustion system through the burner to burn and release heat. The high-temperature flue gas output by the combustion system enters the rotary equipment; the organic solid waste output by the organic solid waste storage and transportation system enters the rotary equipment; the high-temperature flue gas transfers heat with the organic solid waste in the rotary equipment through direct contact, and the gaseous substances output by the rotary equipment enter the furnace of the pulverized coal boiler through the closed pipeline and the solid waste burner for harmless incineration. The solid substances output from the discharge port of the rotary equipment enter the furnace of the pulverized coal boiler through the pulverized coal boiler burner for harmless incineration.

[0015] The heat released by the burning of solid waste in the furnace of the pulverized coal boiler is absorbed by the feed water of the pulverized coal boiler 8 to produce steam, which then enters the high-parameter steam turbine to perform work and generate electricity.

[0016] As a further improvement of the method of using organic solid waste to replace coal for power generation in the combined pulverized coal boiler of the present invention, the following is made:

[0017] Furthermore, the outlet of the boiler pulverizing system is connected to the inlet of the combustion system via a primary fan and a burner.

[0018] Furthermore, the discharge port of the rotary device is connected to the shell side inlet of the cooling device, the shell side outlet of the cooling device is connected to the inlet of the pulverizing device, and the outlet of the pulverizing device is connected to the inlet of the pulverized coal boiler burner;

[0019] The outlet of the secondary air fan is connected to the tube-side inlet of the cooling device, and the tube-side outlet of the cooling device is connected to the secondary air inlet of the burner.

[0020] Furthermore, the secondary fan sends air at room temperature into the cooling device for preheating, and the air output by the cooling device is sent into the combustion system through a closed pipeline and a burner to be burned with coal powder.

[0021] Furthermore, it also includes: pollutants generated by the incineration of solid waste in the pulverized coal boiler are efficiently removed by the pulverized coal boiler tail pollutant removal system, and ultra-low emission indicators of pollutants are achieved.

[0022] Furthermore, it also includes a pulverized coal boiler tail pollutant removal system and a chimney, and the outlet of the pulverized coal boiler is connected to the inlet of the chimney through the pulverized coal boiler tail pollutant removal system.

[0023] The present invention has the following beneficial effects:

[0024] The system and method for using organic solid waste to replace coal for power generation in a combined pulverized coal boiler described in the present invention, when in specific operation, draws primary air (carrying pulverized coal) from the primary air duct at the outlet of the boiler pulverizing system, passes through the primary fan and the burner in the combustion system in sequence to burn and release heat, and generates inert flue gas at about 1400°C; the organic solid waste enters the rotary equipment through the organic solid waste storage and transportation system; the inert flue gas at about 1400°C conducts heat transfer with the organic solid waste in the rotary equipment by direct contact, and the gaseous substances at the outlet of the rotary equipment are transported through a closed pipeline and enter the furnace of the pulverized coal boiler through the solid waste burner for harmless incineration. The solid substances discharged from the discharge port are indirectly cooled in the cooling equipment, and are sent to the pulverized coal boiler pulverizer through the storage bin and the conveying system for crushing, and then enter the pulverized coal boiler furnace with the primary air at the outlet of the pulverized coal boiler pulverizer for harmless incineration. The pollutants generated by the incineration of solid waste in the pulverized coal boiler are efficiently removed by the pollutant removal system at the tail of the pulverized coal boiler, and the pollutant index achieves ultra-low emission. The secondary fan sends room temperature air into the cooling equipment for preheating, and the air output by the cooling equipment is sent into the combustion system through the burner to burn with coal powder. This realizes the full replacement of coal for power generation with organic solid waste. It should be noted that the present invention breaks through the technical bottleneck of solid waste disposal in coal-fired power plants, realizes the resource utilization and harmless disposal of multi-source waste in coal-fired power plants, effectively replaces coal for power generation, and reduces CO 2 Emissions, effectively reducing waste emissions and pollution.

[0025] Furthermore, the temperature of the gaseous medium output by the rotary device is not less than 450° C., thereby ensuring complete carbonization of the organic solid waste and avoiding the generation of tar during the transportation of the rotary device and the outlet gas phase product.

[0026] Furthermore, the combustion system generates high-temperature flue gas of about 1400°C, and the oxygen content is controlled below 6% to ensure the inertness of the high-temperature flue gas.

[0027] Furthermore, pollutants generated by the incineration of solid waste in pulverized coal boilers are efficiently removed by the pulverized coal boiler tail pollutant removal system, achieving ultra-low emissions of pollutant indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1It is a structural diagram of the present invention.

[0030] Among them, 1 is the boiler pulverizing system, 2 is the primary fan, 3 is the burner, 4 is the combustion system, 5 is the rotating equipment, 6 is the organic solid waste storage and transportation system, 7 is the solid waste burner, 8 is the pulverized coal boiler, 9 is the discharge port, 10 is the cooling equipment, 11 is the crushing equipment, 12 is the storage system, 13 is the pneumatic conveying system, 14 is the secondary fan, 15 is the pulverized coal boiler tail pollutant removal system, and 16 is the pulverized coal boiler burner. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Embodiment 1

[0040] refer to Figure 1 The combined pulverized coal boiler system of the present invention utilizes organic solid waste to replace coal for power generation, comprising a boiler pulverizing system 1, a burner 3, a combustion system 4, a rotary device 5, a solid waste burner 7, a pulverized coal boiler 8 and a pulverized coal boiler burner 16;

[0041] The outlet of the boiler pulverizing system 1 is connected to the inlet of the combustion system 4 via the burner 3, the outlet of the combustion system 4 is connected to the inlet of the rotary equipment 5, the outlet of the rotary equipment 5 is connected to the inlet of the solid waste burner 7, and the outlet of the solid waste burner 7 is connected to the furnace of the pulverized coal boiler 8; the outlet of the organic solid waste storage and transportation system 6 is connected to the rotary equipment 5; the discharge port 9 of the rotary equipment 5 is connected to the inlet of the pulverized coal boiler burner 16, and the outlet of the pulverized coal boiler burner 16 is connected to the pulverized coal boiler 8.

[0042] The method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler of the present invention is realized based on the combined pulverized coal boiler generating electricity by using organic solid waste to replace coal system. The combined pulverized coal boiler generating electricity by using organic solid waste to replace coal system comprises a boiler pulverizing system 1, a burner 3, a combustion system 4, a rotary device 5, a solid waste burner 7, a pulverized coal boiler 8 and a pulverized coal boiler burner 16. The combined pulverized coal boiler generating electricity by using organic solid waste to replace coal method comprises the following steps:

[0043] Primary air is drawn out from the primary air duct at the outlet of the boiler pulverizing system 1, and then enters the combustion system 4 through the burner 3 to burn and release heat. The high-temperature flue gas output by the combustion system 4 enters the rotary equipment 5; the organic solid waste output by the organic solid waste storage and transportation system 6 enters the rotary equipment 5; the high-temperature flue gas transfers heat with the organic solid waste in the rotary equipment 5 by direct contact, and the gaseous substance output by the rotary equipment 5 enters the furnace of the pulverized coal boiler 8 through the closed pipeline and the solid waste burner 7 for harmless incineration, and the solid substance output by the discharge port 9 of the rotary equipment 5 enters the furnace of the pulverized coal boiler 8 through the pulverized coal boiler burner 16 for harmless incineration; the heat released by the combustion of solid waste in the furnace of the pulverized coal boiler 8 is absorbed by the feed water of the pulverized coal boiler 8 to form steam, and then enters the high-parameter steam turbine to do work and generate electricity.

[0044] The invention breaks through the technical bottleneck of solid waste disposal in coal-fired power plants, realizes the resource utilization and harmless disposal of multi-source waste in coal-fired power plants, effectively replaces coal for power generation, and reduces CO 2 Emissions, effectively reducing waste emissions and pollution.

[0045] Embodiment 2

[0046] refer to Figure 1 The system for using organic solid waste to replace coal for power generation in a combined pulverized coal boiler of the present invention comprises a boiler pulverizing system 1, a primary fan 2, a burner 3, a combustion system 4, a rotary device 5, an organic solid waste storage and transportation system 6, a solid waste burner 7, a pulverized coal boiler 8, a discharge port 9, a cooling device 10, a crushing device 11, a storage system 12, a pneumatic conveying system 13, a secondary fan 14, a pulverized coal boiler tail pollutant removal system 15 and a pulverized coal boiler burner 16;

[0047] The outlet of the boiler pulverizing system 1 is connected to the inlet of the primary fan 2, the outlet of the primary fan 2 is connected to the inlet of the burner 3, the outlet of the burner 3 is connected to the inlet of the combustion system 4, the outlet of the combustion system 4 is connected to the inlet of the rotary device 5, the outlet of the rotary device 5 is connected to the inlet of the solid waste burner 7, the outlet of the solid waste burner 7 is connected to the furnace of the pulverized coal boiler 8; the outlet of the organic solid waste storage and transportation system 6 is connected to the rotary device 5; the discharge port 9 of the rotary device 5 is connected to the shell side inlet of the cooling device 10 The shell side outlet of the cooling device 10 is connected to the inlet of the pulverizing device 11, the outlet of the pulverizing device 11 is connected to the inlet of the storage system 12, the outlet of the storage system 12 is connected to the inlet of the pneumatic conveying system 13, the outlet of the pneumatic conveying system 13 is connected to the inlet of the pulverized coal boiler burner 16, and the outlet of the pulverized coal boiler burner 16 is connected to the pulverized coal boiler 8; the outlet of the secondary air fan 14 is connected to the tube side inlet of the cooling device 10, and the tube side outlet of the cooling device 10 is connected to the secondary air inlet of the burner 3. The outlet of the pulverized coal boiler 8 is connected to the inlet of the chimney through the pulverized coal boiler tail pollutant removal system 15.

[0048] The method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler of the present invention is realized based on the combined pulverized coal boiler generating electricity by using organic solid waste to replace coal system, and the combined pulverized coal boiler generating electricity by using organic solid waste to replace coal system comprises a boiler pulverizing system 1, a primary fan 2, a burner 3, a combustion system 4, a rotary device 5, an organic solid waste storage and transportation system 6, a solid waste burner 7, a pulverized coal boiler 8, a discharge port 9, a cooling device 10, a crushing device 11, a storage system 12, a pneumatic conveying system 13, a secondary fan 14, a pulverized coal boiler tail pollutant removal system 15 and a pulverized coal boiler burner 16; specifically, the combined pulverized coal boiler generating electricity by using organic solid waste to replace coal method comprises the following steps:

[0049] The primary air (carrying coal powder) is drawn from the primary air duct at the outlet of the boiler pulverizing system 1, and then enters the combustion system 4 through the primary fan 2 and the burner 3 to burn and release heat, generating high-temperature flue gas of about 1400°C, with the oxygen content controlled below 6% to ensure the inertness of the high-temperature flue gas. The high-temperature flue gas output by the combustion system 4 enters the rotary device 5; the organic solid waste output by the organic solid waste storage and transportation system 6 enters the rotary device 5; the high-temperature flue gas and the organic solid waste are directly contacted in the rotary device 5 for countercurrent (or downstream) heat transfer, and the residence time of the organic solid waste in the rotary device 5 is at least not less than 30 minutes, and the specific residence time is determined by factors such as the type of organic solid waste and the amount of disposal. The temperature of the gaseous medium output by the rotary device 5 is not less than 450°C, ensuring that the organic solid waste is completely carbonized, and avoiding the generation of tar in the rotary device 5 and the transportation process of the outlet gas phase product. The gaseous material output by the rotary device 5 enters the furnace of the pulverized coal boiler 8 through the closed pipeline and the solid waste burner 7 for harmless incineration. The solid matter output from the discharge port 9 of the rotary device 5 is indirectly cooled to below 90°C in the cooling device 10, and then enters the crushing device 11 to be crushed into micron-sized powder. The powder output from the crushing device 11 is stored in the storage system 12. The micron-sized powder stored in the storage system 12 enters the furnace of the pulverized coal boiler 8 through the pulverized coal boiler burner 16 through the pneumatic conveying system 13 for harmless incineration. The heat released by the incineration of solid waste in the furnace of the pulverized coal boiler 8 is absorbed by the feed water of the pulverized coal boiler 8 to produce steam, and then enters the high-parameter steam turbine to do work and generate electricity; the pollutants generated by the incineration of solid waste in the pulverized coal boiler 8 are efficiently removed by the pulverized coal boiler tail pollutant removal system 15, and the pollutant indicators achieve ultra-low emissions. The secondary fan 14 sends room temperature air into the cooling device 10 for preheating. The air temperature output by the cooling device 10 is greater than 1000°C. When the organic solid waste and the flue gas are heat exchanged downstream, the air temperature output by the cooling device 10 is above 400°C. The air is sent to the combustion system 4 through the burner 3 through a closed pipeline to be burned with coal powder, thereby realizing the replacement of coal for power generation with all components of organic solid waste.

[0050] 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.

[0051] 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.

[0052] 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 generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler, characterized in that: It comprises a boiler pulverizing system (1), a burner (3), a combustion system (4), a rotary device (5), a solid waste burner (7), a pulverized coal boiler (8) and a pulverized coal boiler burner (16); The outlet of the boiler pulverizing system (1) is connected to the inlet of the combustion system (4) via the burner (3), the outlet of the combustion system (4) is connected to the inlet of the rotary device (5), the outlet of the rotary device (5) is connected to the inlet of the solid waste burner (7), and the outlet of the solid waste burner (7) is connected to the furnace of the pulverized coal boiler (8); the outlet of the organic solid waste storage and transportation system (6) is connected to the rotary device (5); the discharge port (9) of the rotary device (5) is connected to the inlet of the pulverized coal boiler burner (16), and the outlet of the pulverized coal boiler burner (16) is connected to the pulverized coal boiler (8).

2. The system for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 1 is characterized in that: The outlet of the boiler pulverizing system (1) is connected to the inlet of the combustion system (4) via a primary fan (2) and a burner (3).

3. The system for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 1 is characterized in that: It also includes a cooling device (10) and a pulverizing device (11), wherein the discharge port (9) of the rotary device (5) is connected to the shell side inlet of the cooling device (10), the shell side outlet of the cooling device (10) is connected to the inlet of the pulverizing device (11), and the outlet of the pulverizing device (11) is connected to the inlet of a pulverized coal boiler burner (16).

4. The system for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 3 is characterized in that: It also includes a storage system (12) and a pneumatic conveying system (13), the outlet of the pulverizing device (11) is connected to the inlet of the storage system (12), the outlet of the storage system (12) is connected to the inlet of the pneumatic conveying system (13), and the outlet of the pneumatic conveying system (13) is connected to the inlet of the pulverized coal boiler burner (16).

5. The system for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 3 is characterized in that: It also includes a secondary air fan (14), the outlet of the secondary air fan (14) is connected to the tube side inlet of the cooling device (10), and the tube side outlet of the cooling device (10) is connected to the secondary air inlet of the burner (3).

6. The system for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 1 is characterized in that: It also includes a pulverized coal boiler tail pollutant removal system (15) and a chimney. The outlet of the pulverized coal boiler (8) is connected to the inlet of the chimney through the pulverized coal boiler tail pollutant removal system (15).

7. A method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler, characterized in that: The system for generating electricity by using organic solid waste to replace coal based on the combined pulverized coal boiler of claim 1 comprises the following steps: Primary air is drawn from the primary air duct at the outlet of the boiler pulverizing system (1), and then enters the combustion system (4) through the burner (3) to burn and release heat. The high-temperature flue gas output by the combustion system (4) enters the rotary device (5); the organic solid waste output by the organic solid waste storage and transportation system (6) enters the rotary device (5); the high-temperature flue gas and the organic solid waste are directly contacted in the rotary device (5) for heat transfer. The gaseous substances output by the rotary device (5) enter the furnace of the pulverized coal boiler (8) through the closed pipeline and the solid waste burner (7) for harmless incineration. The solid substances output by the discharge port (9) of the rotary device (5) enter the furnace of the pulverized coal boiler (8) through the pulverized coal boiler burner (16) for harmless incineration. The heat released by the combustion of solid waste in the furnace of the pulverized coal boiler (8) is absorbed by the feed water of the pulverized coal boiler (8) to form steam, which then enters the high-parameter steam turbine to perform work and generate electricity.

8. The method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 7, characterized in that: The discharge port (9) of the rotary device (5) is connected to the shell side inlet of the cooling device (10), the shell side outlet of the cooling device (10) is connected to the inlet of the pulverizing device (11), and the outlet of the pulverizing device (11) is connected to the inlet of the pulverized coal boiler burner (16); The outlet of the secondary air fan (14) is connected to the tube-side inlet of the cooling device (10), and the tube-side outlet of the cooling device (10) is connected to the secondary air inlet of the burner (3).

9. The method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 8, characterized in that: The secondary fan (14) sends air at room temperature into the cooling device (10) for preheating. The air output from the cooling device (10) is sent into the combustion system (4) through a closed pipeline and a burner (3) to be burned with coal powder.

10. The method for generating electricity by using organic solid waste to replace coal in a combined pulverized coal boiler according to claim 8, characterized in that: Also includes: Pollutants generated by the incineration of solid waste in a pulverized coal boiler (8) are efficiently removed by a pulverized coal boiler tail pollutant removal system (15), achieving ultra-low emission of pollutant indicators.

Images