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A fan switching method

A technology of fan and shutdown state, which is applied in combustion methods, mechanical equipment, blast equipment, etc., and can solve problems such as temperature reduction and affecting the quality of cement firing

Active Publication Date: 2021-04-27
ESURGING TIANJIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fan switching method to solve the problem that the temperature in the furnace drops sharply during the process of switching the standby fan and affects the firing quality of cement

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Embodiment Construction

[0045] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention relates to the technical field of cement firing, and specifically discloses a fan switching method. The main and standby fan device includes a first fan and a second fan arranged in parallel, and a first pressure sensor and a first check valve are arranged in the first branch. , bleed valve and shut-off valve, the second branch is equipped with a second check valve, the process of replacing the second fan with the first fan, the first fan is adjusted to the preset pressure value that can provide the burner by controlling the bleed valve At this time, open the stop valve and close the second fan, and the air pressure in the burner is kept at the preset value; by gradually closing the bleed valve and gradually reducing the speed of the first fan, until the bleed valve is fully close. The above setting reduces the energy consumption of the first fan, maintains the stability of the gas pressure entering the furnace through the burner to the greatest extent, avoids a sharp drop in the temperature in the furnace, stabilizes the production process, and ensures the quality of the product.

Description

technical field [0001] The invention relates to the technical field of cement firing, in particular to a fan switching method. Background technique [0002] Cement firing generally adopts a converter, and there is a burner at the kiln head, and the air of a certain pressure is passed through the burner to blow the pulverized coal into the furnace for combustion. In the production process, the converter is generally equipped with a main fan and a backup fan, so as to switch between the main fan and the backup fan to deal with the failure of the main fan. In order to keep the temperature in the furnace stable, it is necessary to keep the inlet pressure constant. However, in the production process, if the traditional method of switching the backup fan is adopted, it is necessary to stop the main fan in operation, open the valve of the backup fan, and then turn on the backup fan. This process will cause long-term gas and coal shutdown in the furnace. , the temperature in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N3/00F23L5/02F27B7/34F04D25/16F04D27/00
CPCF04D25/166F04D27/001F04D27/003F04D27/004F04D27/005F23L5/02F23N3/00F27B7/34F23N2225/04F23N2235/02
Inventor 张家鑫张志华何毅沙宏磊俞天野洪申平孙吉松沙佩亮许国辉孟翠
Owner ESURGING TIANJIN TECH CO LTD