CN-122015096-A - Comprehensive utilization system and treatment process for oxygen in household garbage incineration power plant

Abstract

The invention belongs to the field of garbage incineration treatment, in particular to an oxygen comprehensive utilization system and treatment process of a household garbage incineration power plant, comprising a traditional household garbage incineration power generation treatment system; the system comprises a percolate treatment station, a household garbage incinerator, an ozone generator and an oxygen-enriched side-blowing furnace, wherein the oxygen station provides an oxygen source for the percolate treatment station, the household garbage incinerator, the ozone generator and the oxygen-enriched side-blowing furnace, the ozone generator takes oxygen provided by the oxygen station as a raw material to prepare ozone, provides ozone for the percolate treatment station and an ozone denitration reactor, and the oxygen-enriched side-blowing furnace performs oxygen-enriched combustion on slag and fly ash generated by a household garbage incineration power generation treatment system to prepare rock wool through high-temperature melting. According to the invention, through the comprehensive utilization mode of oxygen in the 'one source multiple effect' of the traditional garbage incineration power plant, each system in the traditional household garbage incineration power generation treatment system is organically coupled, the energy efficiency is improved, the pollutant control and the resource recovery are organically combined, and the problems facing the current household garbage incineration power generation enterprises can be effectively solved.

Inventors

• LIU YONGFU
• ZHANG LEI
• ZHANG XINTAO
• ZHANG CHAO
• XU YANWEI
• YANG JIE
• ZHOU GUOSHUN
• ZHAO SHIZHEN
• HU LIHUA
• XIAO CHENGBIN
• WANG SHANGYUN

Assignees

• 光大环境科技（中国）有限公司
• 阳信光大环保能源有限公司

Dates

Publication Date

20260512

Application Date

20260211

Claims (8)

1. 1. An oxygen comprehensive utilization system of a household garbage incineration power plant, which is characterized by comprising: The garbage bin is used for fermenting garbage to reduce moisture and improve heat value, and the leached garbage percolate is used for filtering garbage; A leachate treatment station for treating landfill leachate; the incinerator is used for carrying out incineration treatment on the fermented garbage, the sludge treated by the percolate and the concentrated solution, and primary air and secondary air are introduced into the incinerator for complete combustion; oxygen-enriched side-blown furnace, which is supplied with oxygen by oxygen station and used for oxygen-enriched combustion of slag produced by incinerator and fly ash produced by flue gas purification system, and high-temperature melting to produce rock wool; The waste heat boiler is divided into a first boiler and a second boiler, wherein the first boiler is connected with the incinerator, and generates electricity by utilizing heat exchange of high-temperature flue gas generated by the incinerator, and the second boiler is connected with the oxygen-enriched side-blown boiler, generates steam by utilizing heat exchange of high-temperature flue gas generated by the oxygen-enriched side-blown boiler, and heats primary air entering the incinerator; the flue gas purification system is used for purifying the low-temperature flue gas after the oxidation treatment; an ozone generator connected with the percolate treatment station and the ozone denitration reactor, and supplying ozone to the percolate treatment station and the ozone denitration reactor by utilizing oxygen supply of the oxygen station; and the oxygen station is used for providing oxygen for primary air and secondary air of the incinerator, an ozone generator, a percolate treatment station and an oxygen-enriched side-blowing furnace.
2. 2. The treatment process of the oxygen comprehensive utilization system of the household garbage incineration power plant according to claim 1, which is characterized by comprising the following steps: The method comprises the steps of firstly, transporting raw garbage to a garbage bin, storing for a plurality of days for fermentation to reduce moisture and improve heat value, and transporting leached garbage leachate to a leachate treatment station; Step two, the percolate firstly enters a pretreatment stage to remove suspended matters and carry out homogenization adjustment, then enters a biological treatment stage to undergo anaerobic treatment and aerobic treatment, and oxygen for the aerobic treatment comes from an oxygen station; Continuing membrane separation treatment on the percolate, wherein the membrane separation treatment is divided into ultrafiltration (MBR), nanofiltration (NF) and Reverse Osmosis (RO), performing primary ozone treatment on the percolate after ultrafiltration membrane separation and before nanofiltration, performing secondary ozone treatment on the concentrated solution, wherein COD, chromaticity and trace toxic substances remained in the percolate are oxidized, performing nanofiltration and reverse osmosis on the treated percolate again, and finally obtaining qualified water for recycling, wherein the concentrated solution is subjected to secondary ozone treatment; Step four, the fermented garbage in the garbage bin and sludge generated in the treatment process of percolate enter an incinerator for burning, and concentrated solution generated in the treatment process of percolate is sprayed back into the incinerator; And fifthly, generating steam for the turbo generator set to generate electricity after the high-temperature flue gas generated by the incinerator enters the first waste heat boiler for heat exchange, enabling the low-temperature flue gas after heat exchange to enter the ozone denitration reactor for oxidation treatment of low-valence nitrogen oxides into high-valence nitrogen oxides, and finally enabling the low-temperature flue gas to reach the standard for emission after treatment by the flue gas purification system.
3. 3. The treatment process of the oxygen comprehensive utilization system of the household garbage incineration power plant is characterized in that fly ash generated by a flue gas purification system is washed by water, slag generated by an incinerator is crushed and then enters an oxygen-enriched side-blown furnace together, the oxygen-enriched side-blown furnace carries out oxygen-enriched combustion, and the mixed slag and the fly ash are melted at a high temperature to prepare rock wool.
4. 4. A treatment process of an oxygen comprehensive utilization system of a household garbage incineration power plant is characterized in that high-temperature flue gas of an oxygen-enriched side-blown furnace enters a second waste heat boiler to generate steam, low-temperature flue gas after heat exchange also enters an ozone denitration reactor, and the hot steam generated by the waste heat boiler heats a primary air-air preheater for heating primary air entering an incinerator.
5. 5. The treatment process of the comprehensive oxygen utilization system of the household garbage incineration power plant, which is characterized in that the ratio of primary air to secondary air entering an incinerator is 7:3, and the temperature of the primary air entering the incinerator is 220 ℃.
6. 6. The treatment process of the comprehensive utilization system of oxygen in the household garbage incineration power plant, which is characterized in that the oxygen content of primary air in a combustion section of an incinerator is adjusted between 21 and 30 percent according to the combustion condition of a bed layer, and the oxygen content of primary air in a burnout section is adjusted between 21 and 25 percent.
7. 7. The treatment process of the comprehensive oxygen utilization system of the household garbage incineration power plant is characterized in that secondary air is introduced into the throat part of a hearth of the incinerator and is sprayed, and the oxygen content of the secondary air is adjusted to be 21-23%.
8. 8. The treatment process of the comprehensive oxygen utilization system of the household garbage incineration power plant is characterized in that the combustion oxygen content in the oxygen-enriched side-blown furnace is adjusted to be 50-80%.

Description

Comprehensive utilization system and treatment process for oxygen in household garbage incineration power plant Technical Field The invention belongs to the field of garbage incineration treatment, and particularly relates to an oxygen comprehensive utilization system and treatment process of a household garbage incineration power plant. Background The garbage classification is gradually implemented, the environmental protection requirement is gradually strict, and under the influence of multiple factors such as carbon emission reduction, the household garbage incineration power generation industry abandons the original high-speed rough development and gradually turns to the green low-carbon high-quality development. The current household garbage incineration power generation enterprises face multiple challenges such as insufficient garbage amount, improvement of environmental protection standards, energy efficiency bottleneck, pollutant emission limitation, high operation cost and the like, and enterprise operation will gradually enter the periods of cost reduction, efficiency enhancement, pollution reduction and carbon reduction. The patent with publication number CN222718203U discloses an oxygen-enriched combustion and fly ash melting system for mature garbage, which comprises a liquid oxygen gasification system, a garbage incineration system and a fly ash melting system, wherein liquid oxygen is gasified and then is respectively sent into the garbage incineration system and the fly ash melting system for oxygen-enriched combustion, so that high-temperature melting treatment of the mature garbage and the incineration fly ash is realized; The patent with publication number CN115200024A discloses a low-nitrogen oxygen-enriched high-efficiency clean garbage incineration system and a method, comprising a pressure swing adsorption O 2 separator, a flue gas steam heat exchanger, an incinerator, a preheating furnace, a semi-dry reaction tower, a bag-type dust remover and the like, wherein the core of the system is three stages of anaerobic drying/pyrolysis, solid-phase air combustion and gas-phase oxygen-enriched combustion, a certain amount of flue gas is extracted from the back of a draught fan to enter a pressure swing adsorption oxygen separator, anaerobic flue gas enters an anaerobic drying/heating stage, and oxygen enters a gas-phase oxygen-enriched combustion stage to perform oxygen-enriched combustion; The patent with publication number CN113701162A discloses an oxygen-enriched garbage incineration power generation system, which prepares hydrogen by electrolyzing garbage leachate through low-price green electricity generated by garbage incineration, and oxygen as a byproduct enters an incineration system from a secondary air system to carry out oxygen-enriched combustion. The patent mentioned above all obtains oxygen through different modes and carries out oxygen-enriched combustion, belongs to the application of oxygen in the oxygen-enriched combustion field, and oxygen utilization is comparatively single. Disclosure of Invention The invention aims to solve the problems of insufficient garbage amount, improvement of environmental protection standards, energy efficiency bottleneck, pollutant emission limitation, high operation cost and the like of the conventional household garbage incineration power generation enterprises, and provides an oxygen comprehensive utilization system and a treatment process for a household garbage incineration power plant so as to realize cost reduction, efficiency enhancement, pollution reduction and carbon reduction of the enterprises. In order to achieve the above purpose, the present invention adopts the following technical scheme: The invention relates to an oxygen comprehensive utilization system of a household garbage incineration power plant, which comprises the following components: The garbage bin is used for fermenting garbage to reduce moisture and improve heat value, and the leached garbage percolate is used for filtering garbage; A leachate treatment station for treating landfill leachate; the incinerator is used for carrying out incineration treatment on the fermented garbage, the sludge treated by the percolate and the concentrated solution, and primary air and secondary air are introduced into the incinerator for complete combustion; oxygen-enriched side-blown furnace, which is supplied with oxygen by oxygen station and used for oxygen-enriched combustion treatment of slag produced by incinerator and fly ash produced by flue gas purification system, and high-temperature melting to produce rock wool; the waste heat boiler is divided into a first boiler and a second boiler, wherein the first boiler is connected with the incinerator, and generates electricity by utilizing heat exchange of high-temperature flue gas generated by the incinerator; The ozone denitration reactor is used for oxidizing low-temperature flue gas of the waste heat boiler; the flue gas pur