Off-line incineration device used for co-processing of solid waste in cement kiln and method

Abstract

The invention relates to the technical field of co-processing of solid waste in a cement kiln, in particular to an off-line incineration device used for co-processing of solid waste in the cement kilnand a method. The off-line incineration device comprises a furnace body, a spouting necking is fixedly installed at the top of the furnace body, a mixed combustion chamber is fixedly installed at thetop of the spouting necking, a waste gas outlet pipeline is fixedly installed at the top of the mixed combustion chamber, a fluidized bed combustion chamber and a layered combustion chamber are arranged in the interior of the furnace body, an adjusting gate plate is movably installed between the fluidized bed combustion chamber and the layered combustion chamber, and a primary air pipe is fixedlyinstalled at the bottom of the fluidized bed combustion chamber. According to the off-line incineration device for co-processing of the solid waste in the cement kiln and the method, the defects of an on-line incineration device are overcome, off-line arrangement can be carried out between a decomposition furnace and the rotary kiln in the aspect of utilization of incinerated materials and wasteheat and waste gas, the mutual influence between the decomposition furnace and the rotary kiln is effectively reduced; and the final co-processing efficiency and effect in the cement kiln are furtherimproved.

Description

technical field [0001] The invention relates to the technical field of cement kiln cooperative disposal of hazardous waste, in particular to an off-line incineration device and method for cement kiln cooperative disposal of hazardous waste. Background technique [0002] At present, the co-processing of solid waste in cement kilns, most enterprises adopt the direct dosing and disposal method of adding decomposition furnace without passing through the incineration device, and a few enterprises adopt the indirect dosing and disposal method of special incineration device. The technology of incineration device can be divided into Off-line furnace and online furnace technology, online furnace technology is a pre-combustion and supplementary combustion incinerator combined with cement kiln calciner. The incinerator is a part of the calciner. The two processes are closely related, but it is difficult to handle them well. The balance between the two causes mutual influence still exis...

AI Technical Summary

Problems solved by technology

[0002] At present, the co-processing of solid waste in cement kilns, most enterprises adopt the direct dosing and disposal method of adding decomposition furnace without passing through the incineration device, and a few enterprises adopt the indirect dosing and disposal method of special incineration device. The technology of incineration device can be divided into Off-line furnace and online furnace technology, online furnace technology is a pre-combustion and supplementary combustion incinerator combined with cement kiln calciner. The incinerator is a part of the calciner. The two processes are closely related, but it is difficult to handle them well. The balance between the two causes mutual influence still exists, and the off-line furnace is an incinerator designed separately from the decomposition furnace. The work of the off-line incinerator is to incinerate hazardous waste. The operation of the furnace and the calciner does not affect each other, but the flue gas enters the calciner for further combustion after the hazardous waste is incinerated. At present, the mainstream offline incineration technologies on the market mainly include gasifier combustion technology, fluidized bed combustion technology, and grate combustion technology. Furnace combustion technology, etc. Take these types of furnaces as an example, each has its own advantages, and has its own scope of application for the materials to be disposed and processed. Any single combustion technology is better for disposing of certain types or types of hazardous waste. However, it is difficult to meet and adapt to the products of the current pretreatment process for the co-processing of hazardous waste in cement kilns, often appearing inappropriate dosing and transportation, few means suitable for dosing, low disposal volume, and excessive temperature in the furnace. low or too high, incomplete incineration, etc. Therefore, the use of simple combustion methods has been unable to completely solve the incineration and disposal of hazardous wastes of different types, different particle sizes, different calorific values, different moisture contents, and different forms. It is urgent to try to use Compound combustion technology to solve this problem

[0003] At present, the commonly used pretreatment technology for co-processing hazardous waste in cement kilns is nothing more than SMP pretreatment technology. The purpose is to integrate crushing, mixing and transportation into one treatment process. This process has a high degree of automation, low labor intensity, and high safety and reliability. It is generally favored by the cement industry because of its low risk of personnel health, but its own technical equipment and process operation characteristics lead to a low disposal rate. After pretreatment, the combustion of paste materials has a great impact on the kiln conditions of the cement kiln, and the disposal time is low. Generally, semi-solid hazardous waste is directly injected into the calciner for combustion by sludge, while solid hazardous waste is pretreated mainly through crushing, screening, and transported into the calciner, and liquid waste is sprayed into the calciner through an atomizing spray gun. The solid sludge can be directly put into the calciner for disposal, and the hazardous waste after the above pretreatment is directly added to the calciner for combustion, which will inevitably occupy the combustion space of the calciner, which will have a great impact on the calcination of cement and aggravate the contradiction between the two. Therefore, designing an off-line incineration device and method for co-processing hazardous waste in cement kilns is an urgent need for the current technical field of co-processing hazardous waste in cement kilns

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