System for increasing proportion of organic waste co-processed by cement kiln and processing method

Abstract

The invention discloses a system for increasing the proportion of organic waste co-processed by a cement kiln and a processing method. The system comprises a decomposing furnace, a tertiary air pipe communicated with the decomposing furnace, a high-temperature pre-processing system, a residue cooling and conveying system, a waste heat power generation system connected with the residue cooling and conveying system and a waste pre-processing system. A waste outlet of the waste pretreatment system is connected with a waste inlet of the high-temperature pretreatment system, a combustion air inlet of the high-temperature pretreatment system is communicated with a waste gas outlet of the waste pretreatment system and a branch pipe of a tertiary air pipe at the same time, and a smoke outlet of the high-temperature pretreatment system is connected into a decomposing furnace. A residue outlet of the high-temperature pre-treatment system is communicated with an inlet of the material distributing device, and an outlet of the material distributing device is connected into the decomposing furnace and the residue cooling and conveying system at the same time. According to the system, the adaptability and the treatment proportion of the cement kiln to the organic waste are improved, and the comprehensive treatment requirements of the regional organic waste are met.

Description

technical field [0001] The invention belongs to the technical field of waste disposal, and in particular relates to a system and a treatment method for increasing the proportion of organic wastes co-treated by cement kilns. Background technique [0002] Most of the existing cement kiln co-processing devices are used to dispose of a single type of waste, such as domestic garbage, sludge, straw, etc., and a few processes that can dispose of multiple types of waste also use collective disposal, that is, after pre-disposal of different wastes Add directly to different parts of the cement kiln system. For example, Chinese patent application CN 208901406U provides a system for co-processing hazardous waste in cement kilns. The system includes a solid hazardous waste disposal unit, a semi-solid hazardous waste disposal unit and a liquid hazardous waste disposal unit. The solid hazardous waste disposal unit, the liquid hazardous waste disposal unit and the semi-solid hazardous was...

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Problems solved by technology

[0004] However, the combustion air of the pre-disposal equipment of this type of technology is generally provided by the tertiary air, but the temperature of the tertiary air is relatively high. When the amount and calorific value of the disposed organic waste change, the temperature of the pre-disposal equipment will also fluctuate and start to decompose. The flue gas temperature of the furnace will also fluctuate, which will affect the stable operation of the clinker firing system of the cement kiln

In order to control the temperature, the method of adding flammable materials (such as coal powder) and non-combustible materials (such as raw meal) is generally used. This method has the problems of slow adjustment speed response, low control accuracy, and occupying the volume of pre-treatment equipment.

In addition, when the ash content of the organic waste is large and the elements that affect the quality of the clinker (such as P, Cl, heavy metal elements, etc.) quality of raw materials, resulting in the problem of insufficient disposal of organic waste

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