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Product Introduction
Waste Gasification Power Plant: capacity from 1000kw to 6000kw, modular design, several modular for big capacity.
Technical Parameters Of Waste Gasification Power Plant
| Heating value of waste input gasifier （kcal/kg) |
Quantity of waste input gasifier（t/d） | Total heating value (kcal/h) |
Flue gas volume （Nm3/h） |
Gasifier diameter （m） |
Boiler capacity （t） |
Steam turbine power capacity (MW) |
Equipment floor space （m2） |
Power consumption per hour （kWh） |
Operator per shift (person) |
| ≥2000 | 50 | 4,170,000 | 10,665 | 3.0 | 8 | 1.1 | 2000 | 130-170 | 7-10 |
| 100 | 8,330,000 | 21,330 | 2*3.0 | 15 | 2.4 | 3000 | 340-460 | 8-12 | |
| 200 | 16,670,000 | 42,660 | 4*3.0 | 2*15 | 4.5 | 4000 | 670-890 | 10-15 | |
| 500 | 41,670,000 | 106,650 | 10*3.0 | 5*15 | 12 | 8000 | 1800-2400 | 12-18 |
Principle Of Pyrolysis Gasification
Pyrolysis is the process of heating and decomposing organics under anaerobic or anoxic conditions. The process is a complex chemical reaction process. Including the breakage of macromolecular bonds, isomerization and the polymerization of small molecules and other reactions, and finally generate a variety of smaller molecules. At the same pyrolysis ambient temperature, the thermogravimetric analysis (TG) and the thermal re-derivative (DTG) of different materials are different.
In the process of pyrolysis, water vapor, free oxygen or combined oxygen reacts with carbon in the fuel to form a combustible gas. The process of waste pyrolysis gasification is complicated, and the conditions of pyrolysis gasification reaction are also different, but all the processes of pyrolysis gasification reaction basically include the processes of drying, pyrolysis, oxidation and reduction of biomass.
Types Of Garbage Suitable For Waste Gasifier
| Household waste | Industrial waste | Medical waste |
|---|---|---|
| >2,000 kcal/kg | >3,500 kcal/kg | >4,000 kcal/kg |
| >8.3 MJ/kg | >14.6 MJ/kg | >16.7 MJ/kg |
Advantages Of Waste Gasifier
- A two-stage treatment process of waste pyrolysis and gasification followed by oxygen-enriched combustion; waste can be completely burned, and the thermal reduction rate and leaching toxicity of the residue after treatment are lower than national standards.
- Higher thermal efficiency, lower heat loss rate; the grate works in the low temperature area to avoid the thermal influence of high temperature on the grate, improve the reliability of equipment operation, and extend the life of the equipment.
- The design is scientific and reasonable, the structure is simple and compact, easy to realize automatic control, the weight is easily arranged, the construction period is short, the operation energy consumption and cost are low, the area is small, the investment is low, and the economic benefits are obvious.
- It has strong adaptability and wide application range. It can handle both high-calorific value garbage and low-calorific value garbage. It can be applied to the treatment of urban domestic garbage and industrial garbage.
Working Principle Of Pyrolysis Technology
Features Of Haiqi Waste Gasification Power Plant
The gasifier adopts “ultra-low air combustion technology”, which is composed of primary combustion chamber and secondary combustion chamber. The primary combustion chamber can be divided into three areas: preheating drying zone, pyrolysis gasification zone, and carbon layer burnout zone.
The garbage enters primary combustion chamber through the sealed feeding, and the bottom of the grate is introduced with ultra-low ratio primary air (λ≤0.5), and the garbage in primary combustion chamber is partially burned (carbonized) and pyrolyzed (to produce combustible pyrolysis gas). The temperature of the pyrolysis gasification zone is 600-900°C, the air distribution coefficient is 0.2, and the residence time is 1.5 hours.
The high-temperature gas produced in the pyrolysis gasification zone provides heat to the fresh garbage that has just entered to make it completely dry. The temperature in the preheating drying zone is 600℃, the air distribution coefficient is 0.1, and the garbage residence time is 0.5 hours. The dried solid waste is easily burned in the combustion zone and pyrolyzed and gasified. The solid residue after pyrolysis gasification stays in the carbon layer burn-out zone for a long time. The temperature in the carbon layer burn-out zone is 900-600℃. The air distribution coefficient is 0.15, and the residence time is 2 hours. All unburned solid residues are then completely burned and turned into ash, and then the ash is discharged to the ash conveyor installed under the furnace.
At the same time, the combustible gas produced by the pyrolysis process filters out part of the dust in the upper settlement zone of the gasifier, and then enters the secondary combustion chamber to be further burned by the excess secondary combustion air. The combustion temperature of combustible gas in the secondary combustion chamber is 900-1100℃, the residence time of flue gas is more than 2 seconds, and the air distribution coefficient is about 0.6. This two-stage combustion minimizes the production of harmful substances in the flue gas. The unique feature of this technology is that it can realize the pyrolysis process without using auxiliary fuel, and separate combustion of the solid residue and the flue gas in a single system.
Waste Pyrolysis Gasification Combined Heat And Power Flow Chart
The garbage raw material is pretreated to remove inorganic substances (glass, iron, stone, sand, etc.) in the garbage, and then the garbage material is sent to the pyrolysis gasifier using a grab bucket, and the pyrolysis gas passes through the secondary combustion chamber above 1000 ℃ High temperature baffled combustion, and flue gas residence time ≥ 2s, effectively decomposes harmful gases such as dioxins. The generated high-temperature flue gas provides heat to the waste heat boiler, and generates steam to drive the steam turbine/screw expansion generator to generate electricity. The exhaust gas is purified by the deacidification tower, activated carbon and dust collector and then discharged to the standard (GB18485-2014). (Suitable for small and medium garbage disposal)
Market Expectation
Waste-To-Energy Project Case
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