Waste disposal
Waste disposal
- As people’s environmental awareness has increased day by day, governments around the world have raised the technical standards for waste management. The most important methods of traditional waste management, such as landfill, composting and incineration, have become increasingly prominent. Ex: Fills landfills large areas of land, the amount of composting is small and the efficiency is low. The secondary pollutants caused by combustion are pollutants of dioxins that prevent its development.
- Therefore, the development of adaptable, efficient and clean waste management technology is the key to solving the problem of urban waste. There is also a trend to develop technology for waste management in countries around the world. Waste pyrolysis technology can effectively overcome problems with severe gas pollution caused by waste incineration while realizing innocence, reduction and resource use of waste. It will thus be a new technology for waste management with great development opportunities.
- Exhaust pyrolysis gasification technology is also called third generation waste management technology.
Pyrolysis gasification technical advantages
Pyrolysis gasification technical advantages
Pyrolysis is the process of heating and decomposition of organic substances under anaerobic or anoxic conditions. The process is a complex chemical reaction process including breaking of macromolecular bonds, isomerization and polymerization of small molecules. Other reactions eventually generate a variety of smaller molecules. At the ambient temperature of the same pyrolysis, thermogravimetric analysis (TG) and the thermal re-derivative (DTG) of different material types are different.
The principle of pyrolysis
and gasification
The principle of pyrolysis
and gasification
In the pyrolysis process, water vapor and free oxygen or combined oxygen with carbon in the fuel react to form a combustible gas. The process of gasifying pyrolysis gasification is complicated and the conditions for pyrolysis gasification reaction are also different. But all processes with pyrolysis gasification reaction basically include the process of drying, pyrolysis, oxidation and biomass reduction.
The construction of the pyrolysis carburetor
Pryolysis carburetor design
The pyrolysis gasification furnace mainly consists of vertical loading silo, continuous cutting machine with double roller, fixed furnace guard, rotating raw material distributor, cam grille, hearth, rotary bearing and pedestal, heavy chains scrapers slag discharge, excessive flue, secondary combustion chamber.
Introduction to waste pyrolysis gasification technology
Introduction to waste pyrolysis gasification technology
Pyrolysis gasification technology uses the pyrolysis gasification principle to process solid waste, which guarantees stability and high efficiency in the combustion chamber without aids.
High combustion temperature, low thermal cutting speed, low fly ash displacement, low dioxin emission concentrations
Simple and compact oven structure, easy operation and start of oven, easy maintenance, low energy consumption
- Combustion in the secondary chamber is a small molecular combustible gas. The pollutants it produces such as SOx (acid gas), NOx (nitrogen oxides), dioxins and heavy metals are very small, and especially fly ash is less than 1% of the amount of waste. Much lower than the amount of fly ash generated by the grate furnace technology. Fluidized bed technology greatly reduces the secondary pollution caused by waste management to the environment, also reduces the cost of treating the syngas.
- The pyrolysis and gasification system is based on the properties of waste and realizes a two-step treatment process. For the first pyrolysis and gasification of the garbage and subsequent oxygen-enriched combustion so that the garbage is burned completely acts as a catalyst.
- Since the pyrolysis gasification chamber (secondary chamber) burns gas and the excess air coefficient is small, the amount of flue gas generated by the pyrolysis method is smaller than that of the direct combustion method, especially the content of pollutants such as SOx, NOx, HCL, HF and heavy metal in the flue gas is smaller. It contributes to the purification of flue gas, which reduces the secondary pollutant emissions and treatment costs.
- The pyrolysis gasification process is carried out under low oxygen conditions and no oxygen conditions, which reduces the formation of dioxin precursors. The temperature in the second combustion chamber is up to 1100 ° C. The residence time for flue gas is more than 2 s and the dioxins can be decomposed quickly, whereby the content of harmful substances such as heavy metals, dioxins and ash is reduced, which greatly reduces secondary pollutants to the environment.
- The unique structural design of the pyrolysis carburetor overcomes the problems of the vertical furnace feed and continuous slag feed by using the relative rotation of the furnace and the grate. Maintains the stability of the operating conditions. The feeding and discharging process is controllable and starting and stopping the oven is easy and simple to maintain.
- The unique temperature field distribution of the pyrolysis gasifier does not require the addition of auxiliary fuel, but also facilitates the pyrolysis gasification of the waste, the thermal efficiency is higher and the thermal burning rate is lower. The grate works in a low temperature range and avoids the heat effect of the high temperature on the grid. It reduces the manufacturing cost of the device, improves the reliability of the operation of the device and extends the life of the unit.
- The design of the pyrolysis carburetor is scientific, the structure is simple and compact, easy to realize automatic control, low weight, short construction period, low energy consumption.
- The pyrolysis carburetor has great adaptability and a wide range of applications. It can not only handle waste with a high calorific value but can also handle waste with a low calorific value. It can be applied not only for waste but also for industrial waste.
Pyrolysis gasification technology uses the pyrolysis gasification principle to process solid waste, which guarantees stability and high efficiency in the combustion chamber without aids.
High combustion temperature, low thermal cutting speed, low fly ash displacement, low dioxin emission concentrations
Simple and compact oven structure, easy operation and start of oven, easy maintenance, low energy consumption
- Combustion in the secondary chamber is a small molecular combustible gas. The pollutants it produces such as SOx (acid gas), NOx (nitrogen oxides), dioxins and heavy metals are very small, and especially fly ash is less than 1% of the amount of waste. Much lower than the amount of fly ash generated by the grate furnace technology. Fluidized bed technology greatly reduces the secondary pollution caused by waste management to the environment, also reduces the cost of treating the syngas.
- The pyrolysis and gasification system is based on the properties of waste and realizes a two-step treatment process. For the first pyrolysis and gasification of the garbage and subsequent oxygen-enriched combustion so that the garbage is burned completely acts as a catalyst.
- Since the pyrolysis gasification chamber (secondary chamber) burns gas and the excess air coefficient is small, the amount of flue gas generated by the pyrolysis method is smaller than that of the direct combustion method, especially the content of pollutants such as SOx, NOx, HCL, HF and heavy metal in the flue gas is smaller. It contributes to the purification of flue gas, which reduces the secondary pollutant emissions and treatment costs.
- The pyrolysis gasification process is carried out under low oxygen conditions and no oxygen conditions, which reduces the formation of dioxin precursors. The temperature in the second combustion chamber is up to 1100 ° C. The residence time for flue gas is more than 2 s and the dioxins can be decomposed quickly, whereby the content of harmful substances such as heavy metals, dioxins and ash is reduced, which greatly reduces secondary pollutants to the environment.
- The unique structural design of the pyrolysis carburetor overcomes the problems of the vertical furnace feed and continuous slag feed by using the relative rotation of the furnace and the grate. Maintains the stability of the operating conditions. The feeding and discharging process is controllable and starting and stopping the oven is easy and simple to maintain.
- The unique temperature field distribution of the pyrolysis gasifier does not require the addition of auxiliary fuel, but also facilitates the pyrolysis gasification of the waste, the thermal efficiency is higher and the thermal burning rate is lower. The grate works in a low temperature range and avoids the heat effect of the high temperature on the grid. It reduces the manufacturing cost of the device, improves the reliability of the operation of the device and extends the life of the unit.
- The design of the pyrolysis carburetor is scientific, the structure is simple and compact, easy to realize automatic control, low weight, short construction period, low energy consumption.
- The pyrolysis carburetor has great adaptability and a wide range of applications. It can not only handle waste with a high calorific value but can also handle waste with a low calorific value. It can be applied not only for waste but also for industrial waste.
Integrated power generation system
Integrated power generation system
Generator set
Generator set
- Recommended use: 8300 or 6300 biogas engine. The advantages of this type of generator set are large drilling diameter, low speed, high torque and suitable for gas with low calorific value.
- Model choice: 500kw / h power production can be selected as a single machine, 500kw / h or more is recommended to use several machines in parallel.
The construction of the pyrolysis carburetor
Pryolysis carburetor design
PLC and DCS automatic control, fully automatic operation, real-time monitoring of HD camera, cloud control to see field data and operation of system equipment anytime and anywhere.
