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Method for increasing the reactivity of wet fuel

A fuel, moist technology, applied in the field of improving the reactivity of moist fuel, can solve the problems of pyrolysis and gasification of high heat, low value materials can not lead to economic advantages, etc., to achieve the effect of improving flammability

Active Publication Date: 2015-09-02
KHD HUMBOLDT WEDAG GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although it is known that wood is burned particularly efficiently by pyrolysis and gasification, for example in special furnaces, pyrolysis and gasification themselves require high heat, so that the use of low-value materials hardly leads to an economical advantage

Method used

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  • Method for increasing the reactivity of wet fuel
  • Method for increasing the reactivity of wet fuel
  • Method for increasing the reactivity of wet fuel

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Embodiment Construction

[0026] exist figure 1 shows a schematic flow diagram in which the method steps according to the invention are arranged symbolically. The method starts in step 1 with the compression of the delivery air in a compressor as a first method step 1 a and is followed by a second method step 1 b in which the compressed delivery air is heated in a heat exchanger. The conveying air is already heated during compression in step 1a and further heated in step 1b by means of a heat exchanger. Although the temperature difference between the delivery air that has been heated by compression and the heat in the heat exchanger in step 1b is smaller than when the delivery air is first heated and then compressed, the latter sequence of steps results in a compressor Has been heated excessively intensely. Furthermore, compressed air has a higher thermal conductivity than less compressed air. The disadvantage of the smaller heat difference, which is responsible for the lower heat conduction, is thu...

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Abstract

The invention relates to a method for increasing the reactivity of damp fuel (B) in a plant for producing cement, comprising the steps of: compressing (1a) conveying air (A) with subsequent heating (1b) of the compressed conveying air (A) in a heat exchanger (2), at the same time comminuting (2a) the damp fuel (B) in a comminuting device (7), feeding (c) the comminuted fuel (B) into the compressed conveying air (A) and transporting (d) the comminuted fuel (B) in the compressed conveying air (A) to a burner (4). According to the invention, it is proposed to use the waste heat (C) of a clinker cooler present in the plant for heating the compressed conveying air (A), the waste heat of which cooler has not previously been economically usable. This achieves the effect of improving the ignitability and obtaining more uniform combustion characteristics of the fuel.

Description

technical field [0001] The invention relates to a method for increasing the reactivity of wet fuel in a cement production plant and to a plant corresponding to the method. Background technique [0002] For the manufacture of cement, a large energy input is required for the drying and deacidification (calcination) of the limestone and for the calcination of the prepared cement clinker in order to maintain the endothermic reactions. In order to make the heat requirements in the manufacturing process economically justified, different fuels are usually used, where high value fuels with predictable and uniform burnout properties are used where precise heat control is important, while other Low value fuels are used where variations in thermal performance are acceptable within established tolerances in the process. [0003] The use of low-value fuels here includes not only high-calorie waste materials, such as solvents that need to be eliminated or used tires that are substantiall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/20F27D17/00
CPCF23K1/04Y02E50/30F27B7/2016F27D17/004F23L15/00C04B7/4407Y02E50/10Y02E20/34
Inventor E·施罗德A·克诺赫
Owner KHD HUMBOLDT WEDAG GMBH