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Method of regulating and controlling air volume of sintering machine by using main ventilation valve and rotating speed in combined mode

A technology of joint regulation and fan speed, applied in the field of metallurgical production, can solve problems such as inability to adjust, and achieve the effects of reducing consumption, reducing power consumption, and improving strength indicators

Active Publication Date: 2013-10-09
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most sintering machines operate at power frequency, and their speed is 1000rpm, which cannot be adjusted. In actual production, only the opening of the baffle can be adjusted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] According to the relationship between fan characteristic curve, air volume Q=K1×(fan speed) N; pressure P=K2×(fan speed) N 2 ;Power W=K3×(fan speed) N 3 ;

[0023] K1=1~1.5

[0024] K2=1.15~1.2

[0025] K3=1.2

[0026] That is: the air volume is proportional to the speed, the pressure is proportional to the square of the speed, and the power is proportional to the cube of the speed.

[0027] If the fan speed is reduced from 100% to 90%, the corresponding air volume is reduced to 90%, the pressure is reduced to 81%, and the power is correspondingly reduced to 72.9%.

[0028] The first step is to formulate the "machine speed-air volume relationship table" according to the functional experiments of sintering machines under different working conditions to find the required air volume range for the current machine speed;

[0029] The second step is to formulate the "fan damper-speed-air volume relationship table" according to the fan characteristic curves of different f...

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PUM

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Abstract

The invention provides a method of regulating and controlling the air volume of a sintering machine by using a main ventilation valve and the rotating speed in a combined mode, and belongs to the field of metallurgical production. The opening degree of an inlet baffle of a draught fan is regulated to 14%-65%, and the rotating speed of the draught fan is regulated to 700-1000rpm. By means of the method, the temperature of sintering flue gas can be effectively stabilized, the frequency of abnormal vibration, caused by the excess temperature of the flue gas, of a main ventilation draught fan is reduced, and threats to operation of a flue gas desulfurization and denitrification system caused by the excess temperature of the flue gas can be reduced.

Description

[0001] technical field [0002] The invention belongs to the field of metallurgical production, and in particular relates to a method for jointly controlling the air volume of a sintering machine by a main exhaust air door and a rotating speed. Background technique [0003] At present, the production concept of "green economy" is being advocated all over the world, and the metallurgical industry is also promoting energy saving and emission reduction to reduce production costs. Adjust the fan speed to achieve. Due to the limitation of demand in the later process, it can only be operated at low machine speed. Such operation with large air volume and low machine speed will increase the power consumption of the sintering process; the sintered ore is cooled on the machine in advance and the composition of the sintered ore is poor; If it is too high, it will cause danger to the dust removal and desulfurization system of the machine head; excessive burning of the furnace bar of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B21/14
Inventor 杨朝刚赵宏高长涛徐慧明甘晓靳朱小红
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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