Upgrading the old model of waste incineration to a new technology for waste gasification

I. Technical advantages and goals reached

1. Secondary high temperature gasification technology thoroughly removes dioxins

According to China's Domestic Waste Gasification Pollution Control Standard (GWKB3-2000), garbage should be fully burned in the gasifier, and flue gas should stay no less than 2 s in the post-combustion chamber at a temperature not lower than 850°C. High temperature is the best way to deal with dioxins. The exhaust gas purification technology meets the requirements and the discharge completely meets or exceeds the national standards.

Huzhou Huanqing Environmental Protection Technology Co., Ltd. invented secondary heat storage and temperature-increasing gasification combustion technology:

First, first gasification of the waste to 1000 ° - → heat storage after the second combustion 1200 ° - endothermic 600 ° - → tail gas emissions 60 ° (Ecotech invented a new combustion technology, emissions meet the natural gas standard), living Waste gasification power generation, biomass fuel combustion boiler, biomass wood gasifier, and secondary heat storage and temperature-increasing combustion technology can meet natural gas emission standards, with high energy efficiency, low emission, and no smoke.

This combustion technology belongs to the national patent product, and is listed in the Climate Division of the National Development and Reform Commission regarding the “National Low-carbon Technology Catalogue for Key Promotion (Second Batch)”, which is available online.

Second, 99% of the current market uses this technology:

Gasification 800°---No heat storage technology 0-→Endothermic 600°-→Exhaust gas emission 200° (low secondary pollution energy efficiency)

2. Fully enclosed gasification and gasification to allow odorless pollution within 50 meters

According to the standards for the Control of Domestic Garbage Gasification Pollution (GWKB3-2000), waste gasification should be controlled and treated with respect to flue gas, sewage, slag, fly ash, odor, and noise to prevent environmental pollution. We adopted the advanced and reliable purification flue gas equipment invented by Huanqing. The waste gas during the waste drying process can reach: 1-5mg/m3 of sulfur dioxide and 50-150mg/m3 of nitrogen oxide, all reaching the highest international standards.

3. Purification of flammable gas direct power generation technology after unique waste gasification

The Huaiqing Garbage Gasification Power Generation Technology complies with GWKB3-2000 and other standards, and technically guarantees and improves the utilization of thermal energy.

Internal combustion engine power generation principle:

1, garbage collection

2. Garbage decomposition: Decomposition of transportation, reutilization of metal by wind, plastic recycling

3, drying and deodorizing water (water content to achieve gasification requirements)

4, high-temperature dry distillation gasification

5, negative pressure mixed gas combustion decoking, into the gas tank, enter the internal combustion engine to generate electricity

4, slag made of granular carbon recycling

Garbage particles: * high density, up to 1.0-1.2g/cm3 * water content below 5% * high calorific value, 3000-3500 calories

Second, the overall layout of domestic waste gasification power generation

Environmentally-friendly stationary waste gasification equipment is mainly composed of the main body of waste gasification furnace and the corresponding electronic control system, including the receiving and feeding system, high-temperature gasification system, flue gas purification system, waste heat utilization system, ash disposal system, exhaust gas Processing system, automatic control system. Depending on the scale, 50 to 3,000 tons of waste can be disposed of on a daily basis, and the heat generated can be used for various energy-consuming equipment, such as drying, smelting, ceramics, and gas-fired power generation.

1, the main equipment details

Equipment breakdown Units Total price (10,000 yuan) Power (KW)

Waste slicer < 2 50

Three-layer automatic drying machine <2 40

Garbage gasifier set <4 10

Combustible gas fractionation purification device set <4 10

2500KW generator set <2 10

For more details, please contact Manager Zheng

2, partial and overall schematic

Correlation index

1, 1.5 kilograms of bio-waste can be emitted for about 1 kilowatt per year, and 30,000 tons of waste can be sent to about 20 million kilo- meters per year.

5, the cost of fuel per degree of electricity is 0.15 yuan, and the cost of electricity for every one-off electricity bill is depreciated by 0.2 yuan, and the total cost is 0.35 yuan for each degree of electricity generated.

3. To deal with daily production capacity of 100 tons of domestic garbage, it is necessary to provide more than 50 mu of production and construction land.

Second, the main equipment working principle and technical parameters

1, garbage gasification furnace (physical map)

Suitable for disposal: domestic waste, medical waste, leather corner waste, agricultural and forestry biomass waste, etc.

working principle:

The high-temperature gasifier directly performs high-temperature pyrolysis and gasification of the waste materials after the drying and sorting. The equipment occupies a small area, has a small investment, and has a low operation and maintenance cost. The main reason is that it adopts a multi-level, overlapping structure and the garbage passes through. Primary combustion and secondary combustion, in which the primary combustion temperature is above 800 degrees, and the secondary combustion temperature is up to 1600 degrees or more, so that it produces a large amount of flammable gas such as CH4, CO, H2 for power generation, and waste gasification produces Poisonous and harmful substances are completely eliminated, do not cause secondary pollution, high energy efficiency, low emissions, and no smoke.

The main parameters: the furnace temperature is greater than 1600 degrees, the flue gas residence time is less than 2S.

2. Flue gas processing equipment

Disposal of waste gas when drying waste can reach: sulfur dioxide 1-5mg/m3, nitrogen oxides 50-150mg/m3

3, biological waste power generation equipment

The fuel made from various biomass materials (such as household garbage, crop straw, sawdust, bagasse, palm shells, etc.) undergoes oxidation, cracking, and reduction reactions through the ring-cleaning gasifier to obtain high-purity combustible gases (CO, H2 and CH4) are directly used by gas generators to generate electricity through dust filtration and simple decoking. The clean gasifier has the leading technology of complete gasification. It requires only 1 to 1.5 kilograms of raw biomass for each degree of power generation, and the power generation efficiency is extremely high.