Cement rotary kiln and incinerator combined treatment system for urban domestic refuse

Abstract

The invention discloses a system for using cement rotary kiln and incinerator to process life waste of city. It comprises a waste incinerator, a cement generator, a controller and several channels. It is characterized in that: said waste incinerator comprises rotary waste incinerator (7), waste feeder (6), waste tank (4), bag deduster (3) and wind discharger (2); said cement generator comprises a cement rotary kiln (15) whose head is connected to a material cooling device (21) and end is connected to a preheat device (12); said waste incinerator, cement generator and several channels form a closed system. The invention can be used to treat city life waste, while its heat and slag can be utilized, with lower pollution discharge and lower cost, without secondary treatment.

Description

technical field [0001] The invention relates to a waste harmless and resource-based treatment technology, in particular to a method and equipment for jointly treating urban domestic waste by utilizing a cement rotary kiln and a waste incinerator. Background technique [0002] At present, the municipal solid waste produced in our country has reached 150 million tons a year, and the amount of domestic solid waste piled up around the city has reached 6 billion tons over the years, occupying about 500 million square meters of ground. In recent years, my country's urban domestic waste has grown rapidly, with an annual growth rate of 9%, and a few cities have reached 15-20%. The direct stacking of garbage and simple landfills release a large amount of harmful gases into the atmosphere, which also contain carcinogens; during the process of garbage stacking and corruption, a large amount of acidic and alkaline organic pollutants are produced, and heavy metals in the garbage are diss...

AI Technical Summary

Problems solved by technology

However, waste incinerator exhaust gas contains a large amount of SO 2 , NO X and other acid gases and toxic and harmful components such as dioxin (Dioxin) and heavy metals; garbage ash contains a variety of heavy metals and other toxic and harmful substances. cause secondary pollution to the water environment

The main defects of waste incineration power generation are: 1. The investment per ton is 500,000-800,000 yuan, and the operating cost is 90-200 yuan, which is too high for investment and operation.

2. The highest utilization rate of heat energy is only 25%, some are even lower than 5%, the utilization rate is too low

4. The ash should be dealt with separately

5. The removal system of harmful gases such as dioxin in exhaust gas is complex

This method only refers to the treatment of the sieved garbage, and does not propose equipment suitable for this method; it only proposes to use the hot air discharged from the clinker cooler to dry the garbage entering the factory, but what kind of equipment should be used for drying, and how There is no description of how the next process of extracting hot air for drying and drying the garbage will be carried out. Similarly, there is no description of how the garbage is fed into the incinerator and where the combustion air comes from.

Therefore, it is still very difficult to deal with primary municipal solid waste

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