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With the rapid development of my country’s economy in recent years, the urbanization rate has also improved year by year, and the collection, disposal and handling of urban life waste has become increasingly urgent. Compared with the traditional hygienic landfill method, the life waste burning method is more environmentally friendly, efficient, and has significant economic benefits. According to the “Construction Plan for the Construction of Harmless Treatment Equipment for the “13th Five-Year Plan” of the National People’s Court of Diseases and Slag Burning in the National People’s Court of Diseases and Slag Burning in the National People’s Court of Diseases and Slag Treatment Methods will increase from 31% in 2015 to 54% in 2020. Today, more and more traditional power companies have turned their attention to career waste burning and power generation projects. Similar to traditional firepower electric power generation projects, the most important equipment for the life waste burning and electric power generation projects is waste burning and boiling furnace (hereinafter referred to as burning furnace). This article compares several mainstream burning and boiling technical routes at the current stage, analyzes the advantages and disadvantages of several boiling models, and proposes boiling model selection suggestions.
Comparison of different burning and burning technology
CareerSugar daddySugar daddyDross burning technology started late in our country and has been used and developed in the Oriental country for decades or even hundreds of years. Influenced by the local status, industrial and technical characteristics of various countries, and the characteristics of waste residues, there are dozens of different waste burning and fire processing technology. According to the relevant requests of the “Professional Slag Burning and Burning Treatment Engineering Technology Standard” (GJJ90-2009) and the fair business operation requirements, the burning furnace selection consideration must meet the following requests:
(1) The quantity of burning lines and the standard of burning lines should be determined based on the treatment scale of the burning factory and the technical maturity level of the burning type. It is advisable to set up 2 to 4 burning lines.
(2) The selected boiler should be suitable for the special categories, I and II residue burning leaves, and the autumn locks the eyes open, rubs the sun’s hole, and looks at several personal chat plants on the stage.
Special large-scale waste burning factory: the total burning and burning of the entire factory can only be 2000t/d or above.
Class I dregs burning factory: the total burning factory can only be 1200~2000t/d (including 1200t/d);
Class II dregs burning factory: the total burning factory can only be 600~1200t/d (including 600t/dSugar daddy).
(3) The residue should be sufficiently burned in the burning furnace. The heat burn rate of the slag after burning is ≤5%, and the remaining time for the smoke temperature in the secondary burning room is not less than 2 seconds under the condition of ≥850℃. (Prevent dioxin production)
(4Sugar baby)Where the design and low heat value range of the low heat value of the scoundum design and burning capacity, it should be suitable for requests for changes in the characteristics of the scoundum throughout the year.
(5) Burning furnaces have super-negative load treatment capabilities, and the residue feeding should be Sugar baby adjustable.
The mainstream types of burning burning furnaces can be divided into mechanical boiler burning furnaces, fluidized bed burning furnaces, and rotary burning furnaces.
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1 Mechanical boiler burning furnace
Is the mechanical boiler coming back? “The scum layer burns the burning furnace, and uses the boiler line to form a boiler bed. The relative movement between the Pinay escort boiler line causes the scum to flip, stir and push forward. The native residue is thrown into the hopper and then goes into the furnace. Under the influence of its own gravity and the furnace pushing force, it is constantly turned and loosened, making it dry for sufficient burning. The furnace tract is divided into drying areas, burning areas, and combustion areas. The residue passes through each area on the furnace tract until the combustion is fully discharged. Burning airPinay escort is introduced from the lower or side of the boiler, and is well mixed with the residue to ensure the burning effect. During normal operation, the furnace temperature is maintained between 850℃ and 950℃. Under normal circumstances, the burning is released.Nes-sugar.net/”>Sugar baby‘s heat can maintain the furnace temperature. When the residue heat value is low, fuel oil is required to spray fuel as a fuel aid.
(1) The advantages of mechanical boiler
(1) The treatment volume of a single platform boiler is large, and the country has a burning furnace operation of 800t/d, with a maximum of 1200t/d.
(2) SlagSugar baby is evenly distributed and sufficiently burned. During operation, the feed situation can be adjusted according to the burning condition of the dregs in the furnace.
(3) Under normal circumstances, the smoke temperature in the furnace is not required to add fuel to the condition of 850C for no less than 2 seconds. The powder content in the smoke is Sugar daddy is low, which reduces the burden on subsequent smoke purifier systems and reduces the operating cost. baby.
(4) The technology is mature and the equipment is operating for more than 8000h/a.
(2) Disadvantages of mechanical boiler
(1) Because key components such as boiler activate and fixation require high temperature alloy steel, the equipment manufacturing price is higher.
(2) The burning and burning body is relatively large, and the corresponding duty cycle is increased.
(3) The demand for residues is continuous, and it is not advisable to start and stop boilers frequently.
2 Fluidized bed burning furnace
The layer combustion method of mechanical boiler is different from the fluidized bed burning furnace. Fluidized bed burning furnaceSugar daddy uses fluidization technology to burn the residue. Any quartz sand is installed in the furnace as a heat load, which is also called bed material. Before burning the residue, heat the heat load in the furnace to above 600°C to make it flow in a boiling state. After the residue breaks, it is poured into the furnace. The fluidized residue and the heat load are sufficiently mixed. The residue is evaporated by moisture, and the temperature decreases and starts to burn. Escort manila
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FlowEscort manilaSugar daddyThere is a thermal load, and the combustion is stable, suitable for the changes of the residue, and has high thermal effect. The disadvantage is that there is a requirement for the particle size of the furnace residue. Since the fluidized bed burning furnace adopts a fluidized combustion method, it is difficult to realize fluidization with components with a larger or more direct weight in the residue to affect the combustion effect. Therefore, before the residue is injected into the boil, the components with a larger proportion or direct thickness need to be removed, so a large power rupture device is required. In addition, because the residue is directly burned after the boiling is injected, in order to improve the burning effect, it is necessary to control the water content of the boiling residue, and pretreat the residue before the boiling is injected to reduce the moisture content. In addition, fluidized bed boiler repairs are relatively large, and the annual operation time is relatively short, only 6000 to 8000h.
3 Reverse burning furnace
Reverse burning furnace is a rotatable boiler that uses refractory coatings inside the steel cylinder, and its purpose is slightly oblique along the axis. The residue is poured into the upper part of the boiler, and the boiler rotates slowly, causing the residue to constantly turn and move towards the tail of the boiler. The residue is gradually dried and burned in the furnace, and then discharged to the slag removal device. Sometimes, the manila escort is equipped with a front pushing line or a rear pushing line, and the front pushing line is dry and the rear pushing line is ignited. However, it is not easy to control the burning. It is difficult to burn when the residue heat value is low. Redirect burning furnaces are more commonly used for burning ind TC:
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