Process and installation for production of clinker and electricity, and process for modification of a production installation of clinker
A technology of electric power and clinker, which is applied in the improvement field of clinker production equipment, and can solve the problems of reducing the efficiency of the preheater, etc.
Inactive Publication Date: 2015-03-11
LAFARGE SA
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The disadvantage of the latter is that the preheater will not receive sufficient raw material and gas flows for the optimal mode of operation, which means that the efficiency of said preheater is reduced
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0144] The following examples illustrate specific embodiments of the invention and are provided for illustrative and non-limiting purposes only. The table below gives the flow rate of each of the streams described above, together with the temperature of the flue gas, corresponding to three different configurations: C1: no power generation;
[0145] C2: The amount of electricity produced corresponds to the amount required to operate the entire production process of cement, i.e. approximately 150 kWh of electricity per ton of clinker; and
[0146] C3: The amount of electricity produced corresponds to that required to operate only the process producing clinker, ie approximately 75 kWh of electricity per ton of clinker.
[0147] The reference given is figure 1 , those of 2 and 3.
[0148]
[0149]
[0150]
[0151] Configuration C2 makes it possible to generate 137 kWh of electricity per ton of clinker. This makes it possible to provide the electricity needed to run th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to a process for production of clinker and electricity, comprising the following steps: - introduce the raw meal (102, 102'), fuel (121, 121') and a combustion agent (113, 113'), in at least two precalciners (3, 3') positioned in parallel, - precalcine the raw meal at a temperature of from 750 to 950°C, in order to obtain precalcination flue gases (132, 132') and a precalcined raw meal (103, 103'), - treat the precalcination flue gases (132, 132') and the precalcined raw meal (103, 103') towards respective cyclones (4, 4'), in order to obtain precalcination flue gases (133, 135) and a precalcined raw meal (104, 104'), - clinkerise the precalcined raw meal (104, 104'), in order to obtain clinker (105), - produce steam, by transmission of heat from at least one part of the flue gases (135) coming from at least one secondary precalciner (3') and the corresponding cyclone (4'), - produce electricity (150) from this steam, using an electricity generator (6) comprising a steam turbine and steam generator (7), - vary the feed rate of raw meal and / or the flow rate of fuel and / or the flow rate of combustion agent in at least one secondary precalciner (3'), to vary the quantity of electricity produced, - introduce into at least one secondary precalciner (3'), a flow of a dilution flue gas (138'), this flow being, in particular, formed from one part of the precalcination flue gases having already transmitted their heat, wherein the precalcination flue gases (135) coming from the at least one secondary precalciner (3') and the corresponding cyclone (4') are diluted, before transmitting their heat, to obtain diluted precalcination flue gases (136), in particular with a fraction (137) of these precalcination flue gases having already transmitted their heat.
Description
technical field [0001] The invention relates to a production method and equipment for clinker and electric power, and an improvement method for clinker production equipment. Background technique [0002] Typically, clinker production equipment first includes a preheater in which the raw meal is preheated. This preheated raw meal is then precalcined in a precalciner, whereby the CaCO 3 into CaO and CO 2 . This conversion is usually incomplete, as usually only about 90% is converted. [0003] The raw meal is usually pre-calcined at a temperature of 750 to 950 °C. Lower temperatures are not suitable as they do not provide sufficient reaction kinetics. Furthermore, higher temperatures are not suitable since they cause premature and untimely sintering of the raw meal. [0004] The pre-calcined raw meal is then introduced into a kiln where it is fully calcined to form clinker. The clinker is finally led to a cooler where it is quenched. Precalciners and kilns are fed with ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/47F27B7/20F27D17/00
CPCC04B7/475F27D17/004F27B7/2058C04B2290/20C04B7/38C04B7/434Y02P40/121
Inventor M·希门尼斯F·勒鲁瓦
Owner LAFARGE SA