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An Intelligent Control System of Dry Slag Cooling Air Volume

An intelligent control system and cooling air volume technology, applied in lighting and heating equipment, etc., can solve problems such as rising exhaust gas temperature, large slag volume changes, and inability to adjust cooling air volume in real time to achieve effective cooling

Active Publication Date: 2018-05-11
BEIJING GUODIAN FUTONG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device can effectively cool the boiler slag and effectively control the cooling air volume entering the furnace, but the cooling air volume of the device cannot be adjusted in real time with the change of the boiler load. The cooling air volume of the furnace remains unchanged, which will lead to an increase in the exhaust gas temperature
At the same time, the device detects the pressure difference on both sides of the damper through the pressure sensors on both sides of the damper, so as to control the amount of cooling air entering the bottom of the boiler, and the adjustment of the air volume by pressure alone cannot make flexible adjustments to factors such as different types of coal or different loads. so that precise control cannot be achieved

Method used

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  • An Intelligent Control System of Dry Slag Cooling Air Volume
  • An Intelligent Control System of Dry Slag Cooling Air Volume
  • An Intelligent Control System of Dry Slag Cooling Air Volume

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Effect test

Embodiment 1

[0041] This embodiment introduces the intelligent control system of the dry slag cooling air for primary conveying:

[0042] The principle of the dry slag cooling air volume control system of the present invention is: calculating the cooling air volume entering the furnace according to the total furnace air inlet volume under different loads of the boiler, and this air volume is detected by a flowmeter located at the throat of the furnace; under this upper limit air volume condition, The air temperature of the steel belt machine head and the opening of the side air outlet valve are detected by the air thermometer, so that the ambient temperature of the head is in a reasonable range to ensure the safe and stable operation of the equipment. At the same time, according to the air volume at this time, the negative pressure of the bag filter in the slag silo or the opening degree of the connecting pipe with the tail flue is determined, and the excess cooling air is discharged.

[0...

Embodiment 2

[0051] like figure 2 As shown, the slag bin can also be provided with an exhaust pipe 14, the exhaust pipe 14 is connected to the boiler tail flue 10, and the exhaust pipe 14 is provided with a valve that can adjust its opening, so that the The slag bin is connected to the boiler tail flue 10 through the exhaust pipe 14, and the negative pressure of the boiler tail flue 10 can be utilized to facilitate the suction of the dry slag cooling air in the steel belt machine.

Embodiment 3

[0053] The secondary (including multi-stage) dry slag delivery system is slightly different from the primary dry slag delivery system. The tail of the secondary steel belt machine and the head of the primary steel belt machine are connected through a communication pipe. After the communication pipe is closed, the primary steel belt machine can be isolated from the subsequent steel belt machines. In this embodiment, the communication The pipe is the first communication pipe 12 .

[0054] like image 3 and Figure 4 As shown, the main body 1 of the steel belt conveyor of the secondary dry slag conveying system is designed as a primary conveying device 21 and a secondary conveying device 22 along the ash conveying direction. The first communication pipe 12 is connected to the tail of the secondary conveying device 22, the slag outlet is provided at the head of the secondary conveying device 22, and the air inlet of the primary conveying device 21 is provided at In the ash and ...

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Abstract

The invention discloses an intelligent control system for a dry slag cooling air amount. The intelligent control system comprises an air leading device which is arranged on a steel belt machine body and is close to a slag outlet, an air inlet air amount adjusting device arranged on an air inlet, an air flow speed detection device arranged in the steel belt machine body, and a temperature detection device which is arranged in the steel belt machine body and is used for detecting the air flow speed and the dry slag temperature in the steel belt machine body to acquire the air amount and temperature information to be sent to a controller. The controller controls the output power of the air leading device and the output power of the air inlet air amount adjusting device according to the air flow speed, the temperature information and furnace bottom pressure, so that the amount of air entering a hearth and the temperature of the air for cooling slag on a furnace slag conveying device reach preset values.

Description

technical field [0001] The invention belongs to the field of slag discharge equipment for coal-fired boilers, in particular to an intelligent control system for cooling air volume of dry slag. Background technique [0002] At present, the dry slag discharge system has been widely used in the treatment of boiler bottom ash in thermal power plants. With the development and implementation of the national energy conservation and emission reduction project, the dry slag discharge system has been popularized and applied. In recent years, the dry slag removal method has gradually replaced the traditional hydraulic slag removal method of coal-fired boilers because it simplifies the furnace bottom slag removal system to achieve the purpose of energy saving and consumption reduction, realize clean production, and improve the comprehensive utilization of resources. The equipment part of the dry slag discharge system mainly includes the bottom slag discharge device, the steel belt slag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23J1/06
Inventor 刘振强钟根元马履翱张晶陈贤飞李帅
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV
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