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Method and plant for the simultaneous production of electricity and cement clinker

A technology of cement clinker and cement raw meal, which is applied in lighting and heating equipment, cement production, clinker production, etc., and can solve problems such as low efficiency

Inactive Publication Date: 2010-06-30
F L SMIDTH & CO AS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the downside of this approach is that the efficiency will be so low that virtually eliminating any economic benefit

Method used

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  • Method and plant for the simultaneous production of electricity and cement clinker
  • Method and plant for the simultaneous production of electricity and cement clinker

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Embodiment Construction

[0015] In the accompanying drawings a cement manufacturing plant can be seen comprising two preheater strings 1 and 2, a rotary kiln 5 and a clinker cooler 6, each of said preheater strings 1 and 2 comprising respectively Calciners 3 and 4, each of which is equipped with a separation cyclone 3a and 4a respectively. The preheater train 1 is designed as a conventional multi-cyclone preheater and in the embodiment shown it comprises three cyclone stages, but may also comprise fewer and additional cyclone stages. The preheater string 1 functions in a conventional manner, wherein cement raw meal is conveyed through the inlet 7 into the inlet pipe for the uppermost cyclone stage of the cyclone preheater, as a first step with heat Exhaust gases and combustion air are heated, calcined and clinkered as they pass in countercurrent relationship through the preheater 1, the calciner 3 and then through the rotary kiln 5, wherein the hot exhaust gases are respectively heated in the The bur...

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Abstract

Described is a method as well as a plant for the simultaneous production of electricity and cement clinker by which method cement raw meal is calcined in a calciner (4) subject to simultaneous supply of fuel and combustion air and subsequently burned into cement clinker in a kiln (5), and where some of the heat contained in the exhaust gases from the calciner (4) is utilized to generate electricity by means of a boiler section (18). The method and plant are peculiar in that the combustion air supplied to the calciner (4) does not contain alkali or chloride, and in that the temperature of the exhaust gases used to generate electricity is at least 500 DEG C. Hereby is obtained that coating formations formed on the boiler tubes due to the condensation of alkali and chloride vapours can be avoided, while, at the same time, the efficiency with which thermal energy can be converted into electrical energy can be increased.

Description

technical field [0001] The invention relates to a method for the simultaneous generation of electricity and cement clinker, by which cement raw meal is calcined in a calciner supplied with fuel and combustion air simultaneously and subsequently Cement clinker is fired within the kiln and some of the heat contained therein in the exhaust gases from the calciner is used to generate electricity through the boiler section. The invention also relates to a device for carrying out the method. Background technique [0002] For example, GB2098305A and EP896958A1 have disclosed plants that utilize exhaust gas from a kiln system of a cement manufacturing plant to generate electricity. The electricity is typically generated in a steam turbine with water or other working medium being evaporated simultaneously in one or several boiler sections. In GB2098305A, it is proposed that the boiler section be installed where the temperature of the gas between the first and second stages of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B7/20
CPCC04B7/475F27D17/004F27B7/2058C04B2290/20Y02P40/121F27B7/20
Inventor 詹斯·P·汉森
Owner F L SMIDTH & CO AS
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