Method for producing portland cement clinker using domestic waste incineration residue

A technology of domestic waste incineration and Portland cement, which is applied in cement production and other directions, can solve the problems of not considering the hazards of durability, lack of pozzolanic activity, and increased treatment costs, so as to increase treatment costs, solve land tension and environmental problems. Pollution problem, the effect of alleviating the tension of land resources

Inactive Publication Date: 2009-03-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are following deficiencies in the existing slag comprehensive utilization technology: (1) because the slag contains unburned plastic bags, cloth strips, wood, and larger bricks and glass, and has a certain smell, the smell has a certain smell. Therefore, the slag needs to be sorted and deodorized before the implementation of the above-mentioned resource utilization technology. The process is complicated and the treatment cost increases; Reports, studies and solutions of chloride ions on concrete durability (

Method used

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  • Method for producing portland cement clinker using domestic waste incineration residue
  • Method for producing portland cement clinker using domestic waste incineration residue
  • Method for producing portland cement clinker using domestic waste incineration residue

Examples

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Embodiment 1

[0024] Co-processing the slag of the Likeng waste incineration power plant on a new type of dry-process cement kiln with a double series (kiln train and furnace train) five-stage suspension preheater and FLS spray-type calciner with a diameter of 4.75×75 meters Test. The cement kiln's decomposition furnace, 5-stage cylinder, kiln tail smoke chamber and smoke chamber rising flue are all designed with dust removal holes, air cannons and manual dust removal operation platforms. A bypass air release device is added at the position of the rising flue at the kiln tail close to the 5-stage tube (temperature range of 850 to 950℃), which is connected to the rising flue at the kiln tail through a controllable valve, and is equipped with a coarse powder classification cyclone. And bag filter and exhaust fan. Open the valve to make part of the materials and gas in the kiln enter the bypass system. The materials and the gas are separated by the coarse powder classification cyclone, and the mat...

Embodiment 2

[0035] Through a Φ4.8×72m, a new dry process kiln production line with a double series of five-stage suspension preheater and an RSP calciner to co-dispose of the slag of the Likeng waste incineration power plant. This production line is additionally equipped with a bypass air release device at the outlet of the 5-stage cylinder. In terms of weight percentages, 5.0% of slag, 15.0% of pozzolan, 4.2% of high-iron clay, and 75.8% of limestone are used for white raw meal batching. The slag transported from the waste incineration power plant does not need to be separated, dried and deodorized. It enters the pre-homogenized siliceous material storage yard after weighing through the batching scale, and is stacked on the bottom. The clay material (both It can have a homogenizing effect, and can also prevent and reduce the escape of odor through the covering of the clay layer). According to the raw meal ratio, various materials are measured and transported to the raw meal mill by the iron ...

Embodiment 3

[0045] A test of co-processing slag from a domestic waste incineration power plant was carried out on a Φ4.0×60m, a new dry kiln production line with a single-series five-stage suspension preheater and a CDCR type calciner. In order to ensure the smooth progress of the test, a bypass venting device was added at the ascending pipeline from the outlet of the fifth-stage cylinder to the fourth-stage cylinder of the production line.

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Abstract

The invention discloses a method for producing Portland cement clinker with incineration slag of municipal solid waste. The method is to mount a by-way air exhaust device on the prior novel cement kiln so as to solve the problem of crust and blockage caused by chlorine brought into the kiln by the slag. For a kiln system with a kiln row and a furnace row which are independent from each other, the by-way air exhaust device is arranged in an uptake of a kiln end gas chamber in the kiln row close to a five-stage cylinder; while for common industrial kiln, the air exhaust device is arranged between an outlet of decomposing furnace and an inlet of the five-stage cylinder or arranged at an uptake of an outlet of the five-stage cylinder. The use frequency of the by-way air exhaust device is between once per eight hours and once per three days, the temperature of the air entering the by-way air exhaust device is controlled to be more than 950 DEG C. The method is simple in process, low in treatment cost, and complete in toxicity removal due to the fact that heavy metals in the slag are solidified in the Portland cement clinker and are solidified in hydrates during the hydration of the mineral compositions of the Portland cement clinker. The method contributes to the development of cyclic economy and reduces the consumption of natural resources and energy of the cement industry.

Description

Technical field [0001] The invention relates to a method for producing Portland cement clinker, in particular to a method for producing Portland cement clinker by using domestic waste incineration slag. The method utilizes domestic waste incineration slag through resource utilization of cement industrial kilns. Background technique [0002] Domestic waste incineration power generation is currently one of the main ways to treat domestic waste in developed areas at home and abroad. Incinerator slag is a by-product of municipal solid waste incineration power plants. Each ton of solid waste burned produces about 0.2 tons of slag (also called bottom ash), which includes the residual incineration residue on the grate and the particulate matter falling from the grate. The incinerator slag contains a certain amount of heavy metals such as Cd, Hg, Pd, As, Cr, Se, Zn and more alkali metal ions (K + , Na + ) And chloride ions, most of which have heavy metal content exceeding the limit for C...

Claims

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Application Information

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IPC IPC(8): C04B7/28
CPCC04B7/38Y02P40/10C04B7/28
Inventor 吴笑梅樊粤明林永权
Owner SOUTH CHINA UNIV OF TECH
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