CN113883527A - Construction waste disposal and resource utilization system and method based on pulverized coal fired boiler - Google Patents
Construction waste disposal and resource utilization system and method based on pulverized coal fired boiler Download PDFInfo
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- CN113883527A CN113883527A CN202111212104.5A CN202111212104A CN113883527A CN 113883527 A CN113883527 A CN 113883527A CN 202111212104 A CN202111212104 A CN 202111212104A CN 113883527 A CN113883527 A CN 113883527A
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- pulverized coal
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- flue gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/80—Shredding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a construction waste disposal and resource utilization system and method based on a pulverized coal boiler, which comprises a material storage system, a pretreatment system, an integrated disposal system, a burner, the pulverized coal boiler and a pulverizing system, wherein the material storage system is connected with the pretreatment system; the outlet of the material storage system is connected with the material inlet of the pretreatment system; a high-temperature flue gas interface is arranged on a flue between a hearth outlet of the pulverized coal boiler and the economizer, a hot air interface is arranged on an air preheater outlet air duct of the pulverized coal boiler, and the high-temperature flue gas interface and the hot air interface are connected with a flue gas inlet of a pretreatment system; the outlet of the gaseous product of the pretreatment system is connected with the inlet of the integrated disposal system, the outlet of the integrated disposal system is connected with the inlet of the burner, and the outlet of the burner is connected with the hearth of the pulverized coal boiler; the solid product outlet of the pretreatment system is communicated with the powder making system, and the system and the method can treat the construction waste and utilize resources.
Description
Technical Field
The invention belongs to the field of construction waste disposal, and relates to a construction waste disposal and resource utilization system and method based on a pulverized coal fired boiler.
Background
With the accelerating urbanization process in China, the output of construction waste is rapidly increased, and the traditional modes of landfill and the like have large occupied area and are easy to cause secondary environmental pollution. With the increasing awareness of the environment protection of the nation, the resource utilization and harmless disposal of construction waste become difficult problems for various local governments. The pulverized coal fired boiler of the coal-fired power plant has the advantages of abundant thermoelectricity, high combustion temperature of a hearth, complete tail environment-friendly facilities and the like, is used as a new way for harmless disposal of wastes, and is well paid attention by the nation and the industry. However, the construction waste has complex components, including organic matters, metals, concrete and other inorganic matters, and how to perform resource and harmless treatment on the organic matters, the inorganic matters and the like becomes a technical problem.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a construction waste disposal and resource utilization system and method based on a pulverized coal boiler, and the system and method can treat construction waste and utilize resources.
In order to achieve the aim, the system for treating the building garbage and utilizing the resources based on the pulverized coal boiler comprises a material storage system, a pretreatment system, an integrated treatment system, a burner, the pulverized coal boiler and a powder making system;
the outlet of the material storage system is connected with the material inlet of the pretreatment system; a high-temperature flue gas interface is arranged on a flue between a hearth outlet of the pulverized coal boiler and the economizer, a hot air interface is arranged on an air preheater outlet air duct of the pulverized coal boiler, and the high-temperature flue gas interface and the hot air interface are connected with a flue gas inlet of a pretreatment system; the outlet of the gaseous product of the pretreatment system is connected with the inlet of the integrated disposal system, the outlet of the integrated disposal system is connected with the inlet of the burner, and the outlet of the burner is connected with the hearth of the pulverized coal boiler; the solid product outlet of the pretreatment system is communicated with the powder preparation system.
The outlet of the material storage system is connected with the material inlet of the pretreatment system through the feeding system.
The high-temperature flue gas interface and the hot air interface are connected with an inlet of a flue gas main pipe, and an outlet of the flue gas main pipe is connected with a flue gas inlet of the pretreatment system;
the outlet of the integrated disposal system is connected with the inlet of the combustor through a fan.
The pulverizing system comprises a cooling system and a pulverizing system; the outlet of the cooling system is connected with the inlet of the pulverizing system.
The outlet of the integrated disposal system is communicated with the fan through a closed pipeline.
Also comprises a pollutant removing system; the outlet of the tail pipeline of the pulverized coal boiler is communicated with a pollutant removal system.
The construction waste disposal and resource utilization method based on the pulverized coal fired boiler comprises the following steps:
the multi-source waste in the material storage system is sent into a pretreatment system, high-temperature flue gas extracted from a high-temperature flue gas interface is mixed with hot air extracted from a hot air interface to form mixed flue gas, and then the mixed flue gas enters the pretreatment system;
the mixed flue gas is used for carrying out high-temperature pretreatment on the construction waste in a pretreatment system, converting all moisture in the construction waste into gaseous substances and oxidized organic substances, sending the gaseous substances and the oxidized organic substances together with solid substances with smaller sizes into an integrated disposal system for carbonization, crushing and conveying, and then entering a hearth of a pulverized coal boiler through a burner for harmless incineration;
and (4) feeding the solid product with larger size output by the pretreatment system into a powder making system for cooling and pulverization.
The invention has the following beneficial effects:
the invention relates to a pulverized coal boiler-based construction waste disposal and resource utilization system and method, during specific operation, mixed flue gas is used for carrying out high-temperature pretreatment on construction waste in a pretreatment system, water is completely converted into gaseous substances and oxidized organic substances, the gaseous substances and small-size solid substances enter an integrated disposal system for carbonization, crushing and conveying, then the gaseous substances and the small-size solid substances enter a hearth of a pulverized coal boiler through a burner for harmless incineration, pollutants generated by incineration are efficiently removed through an original pollutant removal system at the tail of the pulverized coal boiler, large-size solid products output by the pretreatment system enter a powder making system for cooling and then pulverization, and pulverized products are comprehensively utilized to realize the treatment and resource utilization of the construction waste.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a material storage system, 2 is a feeding system, 3 is a high-temperature flue gas interface, 4 is a hot air interface, 5 is a pretreatment system, 6 is an integrated disposal system, 7 is a fan, 8 is a burner, 9 is a pulverized coal boiler, 10 is a cooling system, and 11 is a pulverization system.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the system for treating construction waste and utilizing resources based on a pulverized coal boiler according to the present invention includes a material storage system 1, a feeding system 2, a high temperature flue gas interface 3, a hot air interface 4, a pretreatment system 5, an integrated treatment system 6, a fan 7, a burner 8, a pulverized coal boiler 9, a cooling system 10, and a pulverizing system 11;
the outlet of the material storage system 1 is connected with the inlet of the feeding system 2, and the outlet of the feeding system 2 is connected with the material inlet of the pretreatment system 5; a high-temperature flue gas interface 3 is arranged on a flue between a hearth outlet of the pulverized coal boiler 9 and the economizer, a hot air interface 4 is arranged on an air preheater outlet air duct of the pulverized coal boiler 9, the high-temperature flue gas interface 3 and the hot air interface 4 are connected with an inlet of a flue gas main pipe, and an outlet of the flue gas main pipe is connected with a flue gas inlet of a pretreatment system 5; the outlet of the gaseous product of the pretreatment system 5 is connected with the inlet of the integrated disposal system 6, the outlet of the integrated disposal system 6 is connected with the inlet of the fan 7, the outlet of the fan 7 is connected with the inlet of the burner 8, and the outlet of the burner 8 is connected with the hearth of the pulverized coal boiler 9; the solid product outlet of the pretreatment system 5 is connected with the inlet of the cooling system 10, and the outlet of the cooling system 10 is connected with the inlet of the pulverizing system 11.
The construction waste disposal and resource utilization method based on the pulverized coal fired boiler comprises the following steps:
the multi-source waste in the material storage system 1 is sent into a pretreatment system 5 through a feeding system 2, the high-temperature flue gas at the temperature of 700 ℃ extracted from a high-temperature flue gas interface 3 is mixed with the hot air at the temperature of 200 ℃ extracted from a hot air interface 4 to form mixed flue gas at the temperature of 500 ℃, wherein the temperature of the mixed flue gas is adjusted according to the physical properties of the multi-source waste by adopting different extraction ratios of the high-temperature flue gas and the hot air, and then the mixed flue gas is sent into the pretreatment system 5 through a flue gas main pipe;
the mixed flue gas is used for carrying out high-temperature pretreatment on the building waste in the pretreatment system 5, completely converting water into gaseous substances and oxidized organic substances, sending solid substances with relatively small sizes into the integrated treatment system 6 for carbonization, crushing and conveying, determining the temperature of a product output by the integrated treatment system 6 according to the physicochemical characteristics of multi-source waste, generally 200-350 ℃, sequentially passing through a fan 7 and a burner 8 through a closed pipeline, then entering a hearth of a pulverized coal boiler 9 for harmless incineration, and efficiently removing pollutants generated by incineration through a pollutant removal system at the tail part of the pulverized coal boiler 9.
The solid product output by the pretreatment system 5 is cooled in a cooling system 10 and then enters a pulverization system 11 for pulverization, and the pulverized product is comprehensively utilized, wherein the particle size is determined according to the comprehensive utilization requirement.
Finally, the invention effectively treats the water in the building waste and the organic matters which easily emit odor by using the economic heat source of the power plant, recovers the heat of the organic matters, carries out harmless incineration on PVC and the like, reduces the weight by about 47.5 percent, and has simple subsequent treatment. In addition, inorganic matters can be completely changed into granular and powdery building materials, so that the granular and powdery building materials can be recycled, can be sold and benefited, realize the harmless treatment of the coal-fired power plant on the building wastes, save land occupation and social investment funds, and play a vital role in the building waste resource recycling industry.
Claims (8)
1. A system for disposing construction waste and utilizing resources based on a pulverized coal boiler is characterized by comprising a material storage system (1), a pretreatment system (5), an integrated disposal system (6), a burner (8), a pulverized coal boiler (9) and a pulverizing system;
the outlet of the material storage system (1) is connected with the material inlet of the pretreatment system (5); a high-temperature flue gas interface (3) is arranged on a flue between a hearth outlet of a pulverized coal boiler (9) and an economizer, a hot air interface (4) is arranged on an air preheater outlet air duct of the pulverized coal boiler (9), the high-temperature flue gas interface (3) and the hot air interface (4) are connected with a flue gas inlet of a pretreatment system (5), a gaseous product outlet of the pretreatment system (5) is connected with an inlet of an integrated treatment system (6), an outlet of the integrated treatment system (6) is connected with an inlet of a combustor (8), an outlet of the combustor (8) is connected with a hearth of the pulverized coal boiler (9), and a solid product outlet of the pretreatment system (5) is communicated with a pulverizing system.
2. The pulverized coal boiler-based system for construction waste disposal and resource utilization according to claim 1, wherein the outlet of the material storage system (1) is connected with the material inlet of the pretreatment system (5) via the feeding system (2).
3. The pulverized coal boiler-based construction waste disposal and resource utilization system according to claim 1, further comprising a flue gas main pipe; the high-temperature flue gas interface (3) and the hot air interface (4) are connected with the inlet of the flue gas main pipe, and the outlet of the flue gas main pipe is connected with the flue gas inlet of the pretreatment system (5).
4. The pulverized coal boiler-based construction waste disposal and resource utilization system as claimed in claim 1, wherein the outlet of the integrated disposal system (6) is connected with the inlet of the burner (8) through a fan (7).
5. The pulverized coal boiler-based construction waste disposal and resource utilization system as claimed in claim 1, wherein the pulverizing system comprises a cooling system (10) and a pulverizing system (11); the solid product outlet of the pretreatment system (5) is connected with the inlet of the cooling system (10), and the outlet of the cooling system (10) is connected with the inlet of the pulverization system (11).
6. The pulverized coal boiler-based system for building waste disposal and resource utilization according to claim 1, wherein the outlet of the integrated disposal system (6) is communicated with the fan (7) through a closed pipeline.
7. The pulverized coal fired boiler based system for building waste disposal and resource utilization according to claim 1, further comprising a contaminant removal system; the outlet of the tail pipeline of the pulverized coal boiler (9) is communicated with a pollutant removal system.
8. A construction waste disposal and resource utilization method based on a pulverized coal fired boiler is characterized in that the construction waste disposal and resource utilization system based on the pulverized coal fired boiler of claim 1 comprises the following steps:
multi-source waste in the material storage system (1) is sent into a pretreatment system (5), high-temperature flue gas extracted from a high-temperature flue gas interface (3) is mixed with hot air extracted from a hot air interface (4) to form mixed flue gas, and then the mixed flue gas enters the pretreatment system (5);
the mixed flue gas is used for carrying out high-temperature pretreatment on the construction waste in a pretreatment system (5), completely converting moisture in the construction waste into gaseous substances and oxidized organic substances, sending the gaseous substances and the oxidized organic substances together with solid substances with smaller sizes into an integrated disposal system (6) for carbonization, crushing and conveying, and then entering a hearth of a pulverized coal boiler (9) through a combustor (8) for harmless incineration;
the solid product with larger size output by the pretreatment system (5) enters a powder making system for cooling and pulverization.
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| CN202111212104.5A CN113883527B (en) | 2021-10-18 | 2021-10-18 | Construction waste disposal and resource utilization system and method based on pulverized coal fired boiler |
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| CN202111212104.5A CN113883527B (en) | 2021-10-18 | 2021-10-18 | Construction waste disposal and resource utilization system and method based on pulverized coal fired boiler |
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| CN113883527B CN113883527B (en) | 2022-08-23 |
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2021
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| CN113883527B (en) | 2022-08-23 |
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