Heating picking process for promoting cement kiln residual heat generating efficiency

A technology of waste heat power generation and thermal technology, which is applied in waste heat treatment, lighting and heating equipment, heating to dry solid materials, etc., can solve the problems of grate cooler air flow disorder, influence on cement production, energy waste, etc., and improve cascade utilization, Reduce investment costs and electricity costs, improve the effect of performance curves

Inactive Publication Date: 2008-07-09
CITIC HEAVY INDUSTRIES CO LTD +1
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Problems solved by technology

[0007] 3) The low-temperature wind at about 150°C at the tail of the grate cooler is directly discharged, which is not used, resulting in energy waste
[0008] 4) If the coal mill and the AQC boiler are arranged on different sides of the grate cooler, the hot air extracted from both sides of the middle part of the grate cooler is sent to the coal mill and the AQC boiler respectively, resulting in two-way robbing of the air, causing the air flow in the grate cooler to be disturbed, affecting cement production

Method used

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  • Heating picking process for promoting cement kiln residual heat generating efficiency
  • Heating picking process for promoting cement kiln residual heat generating efficiency

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Embodiment Construction

[0025] As shown in Figure 2: This heat extraction process to improve the efficiency of cement kiln waste heat power generation is to mix the remaining low-temperature air at about 150°C at the tail of the grate cooler with medium-temperature waste gas at 380-450°C according to the demand for raw coal, and then send Go to the coal mill for drying raw coal; the steps are as follows:

[0026] 1. Near the residual air pipe of the low-temperature flue at the tail of the grate cooler, the opening leads out of the air pipe and a regulating valve 9 is set on it. The high-temperature regulating valve 9 passes through the air pipe and the middle part of the grate cooler passes through the high-temperature regulating valve 6 to remove the coal mill. The air pipe is connected, and then enters the coal mill system;

[0027] 2. During production, a moisture analysis instrument is installed at the feed port of the coal mill. According to the moisture content of the raw coal, adjust the high-...

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Abstract

The invention relates to a heat collection process for improving power generation efficiency using cement kiln residual heat, belonging to the technical field of power generation using cement kiln low-temperature residual heat. The process comprises the following steps of: mixing the residual low-temperature air (about 150 DEG C) from the tail portion of a grate cooler at a kiln hood and the residual intermediate-temperature waste gas (380-450 DEG C) from the middle portion of the grate cooler as the requirement of raw coal, and delivering to raw coal drying process of a coal-grinding system. The invention can generate power with more high-quality intermediate-temperature waste gas, improve effective cascading use of waste gas, and reduce the explosive risk of the coal-grinding system, so as to ensure safety production of the pulverized coal production system and save energy.

Description

technical field [0001] The invention relates to the technical field of pure low-temperature waste heat power generation in cement kilns, and is widely applicable to industries such as cement, iron and steel, building materials, etc., and is a heat extraction process for improving the power generation efficiency of cement kiln waste heat by utilizing waste heat of medium and low temperature flue gas to generate electricity. Background technique [0002] In order to ensure the sustained, rapid and healthy development of the national economy, realize the comprehensive utilization of resources, save energy and protect the environment, the National Development and Reform Commission requires enterprises to "recycle and rationally utilize waste heat generated in the production process." The cement industry is a large energy consumer. It is an effective measure to save energy and reduce consumption by making full use of the waste heat of waste gas discharged from the new dry process ...

Claims

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Application Information

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IPC IPC(8): F27D17/00F26B3/02
Inventor 俞章法姚敏娟郝景周彭岩张凯
Owner CITIC HEAVY INDUSTRIES CO LTD
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