Principle

▲At present, the treatment methods for domestic garbage, leachate and domestic sludge  adopt process technologies such as landfill, incineration and gasification The landfill method has hidden dangers such as occupying a large amount of land and polluting groundwater, and has been banned by many developed countries. incineration is the current mainstream treatment method, but in the process of domestic incineration, sulfur oxides, nitrogen oxides and fly ash are still produced Emissions are limited by the combustion temperature, and it is difficult to avoid the production of toxic substances such as dioxins Compared with waste incineration, waste gasification technology has a higher reaction temperature and avoids pollution such as dioxins, sulfur oxides, and nitrogen oxides The production of substances enables high-temperature solidification treatment of heavy metals in the garbage, effectively avoiding secondary pollution, and is the main development direction of future domestic garbage treatment technology

▲But it is also a difficult problem to solve the garbage problem in cities and towns, and there are still a lot of effective treatment of urban sludge and residual leachate The sludge has high moisture content and is mostly mixed with burning treatment. the leachate contains high salt and high organic matter components, which causes problems such as high treatment cost, high corrosiveness, easy fouling and clogging, large equipment investment, unstable operation and high operating cost , And the energy problem needs to be solved first Therefore, the waste heat generated by incineration or gasification needs to be sourced, and the drying of sludge and the treatment of leachate just need heat energy Therefore, the use of comprehensive integrated co-processing technology is the most effective means, especially for co-processing in small towns The most direct, simple and effective disposal process to solve the municipal environmental protection zero emission problem To this end, the company develops and produces an integrated complete set of integrated disposal system

▲The domestic waste is first sorted out of relatively high-value recyclables, and the remainder, domestic sludge, and other solid wastes become gasification raw materials through pretreatment processes such as dehydration and molding

▲After the gasification raw materials enter the gasification furnace, they undergo non-catalytic partial oxidation reaction with oxygen at high temperature (the temperature of the reaction core area can reach 2000°C) to produce crude synthesis gas with CO, H2, CO2, CH4, N2, etc as the main components  The high-temperature crude synthesis gas (temperature about 900~1100℃) exiting the gasifier first enters the waste heat boiler for heat recovery, and then enters the purification section after generating steam Unreactable inorganic substances and heavy metals are discharged from the gasification furnace in a liquid slagging manner at high temperatures, and after chilling, they become non-leaching glassy slag, which can be recycled for making bricks and paving

▲In the purification section, the crude synthesis gas is first subjected to dust removal to reduce the solid content in the synthesis gas to 1mg/Nm3, and then H2S and other components are removed The purified synthesis gas enters the gas boiler, and the by-product steam produced is just used for the treatment of domestic sludge and leachate

▲The waste water and waste gas generated by the system are discharged in compliance with the   integrated comprehensive treatment

Processing

Technical characteristics and innovation

▲Independent innovation uses a variety of methods, system integration, and comprehensive processing technology to effectively solve the difficulties and pain points of system integration processing, so as to truly cause zero discharge.

▲Especially suitable for the co-processing of 30-150 tons of domestic garbage, sludge and leachate per day in small towns, effectively solving the problems of waste transfer, separate treatment, resource utilization, pollution discharge, etc.

▲The system unit can learn from each other's strengths and recycle resources, which greatly reduces the problems of investment, floor space, energy consumption, and operating costs, and improves the overall processing capacity and stability The generated pyrolysis gas is used as an alternative heat source for sludge drying and leachate treatment, and the dried sludge is used as a supplementary energy for gasification, so as to cause complementarity and cause the goal of comprehensive zero-emission treatment

▲Caused the clean, efficient, and comprehensive utilization of domestic garbage, domestic sludge and leachate.

▲High-temperature gasification reaction under reducing atmosphere avoids the formation of harmful components of sulfur oxides, nitrogen oxides and dioxins.

▲High-temperature liquid slag discharge realizes high-temperature solidification treatment of heavy metals and avoids secondary pollution.

▲The synthesis gas purification process is simple and efficient, avoiding the formation of fly ash and sulfur oxides in the flue gas.

▲Sewage discharged in circulation can be discharged uniformly after being treated by the membrane in the system.

▲After pretreatment and condensation treatment, the dried and evaporated tail gas is directly incinerated in the system, and it is discharged up to the standard.

▲The company distinguishes resource utilization, harmlessness, and reduction requirements according to the government's different requirements and processing capacity It can use different modular processing technologies and equipment, and can also be divided into units or integrated complete sets of design and use

Comparison of main disposal methods of domestic garbage and sludge