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Control system and control method of primary fan with liquid resistance speed regulator

The technology of a liquid resistance governor and control system is applied in the combustion method, the fuel burning in the molten state, lighting and heating equipment, etc., and can solve the problems affecting the stability and economic operation of the boiler.

Inactive Publication Date: 2015-12-09
SHANXI UNIV
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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 solve the technical problem that the primary air system of the existing double-furnace circulating fluidized bed boiler with underpants structure has not been put into automatic control, and always operates in a manual state, which directly affects the stability and economical operation of the boiler, and provides a A primary fan control system with liquid resistance governor and its control method

Method used

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  • Control system and control method of primary fan with liquid resistance speed regulator
  • Control system and control method of primary fan with liquid resistance speed regulator
  • Control system and control method of primary fan with liquid resistance speed regulator

Examples

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Embodiment 1

[0062] Such as figure 1 As shown, the primary fan control system with a liquid resistance governor in this embodiment includes a primary fan inlet baffle control device and a liquid resistance governor control device;

[0063] The primary fan inlet baffle control device includes a first function generator 1, a first adder 2, a first bias setter 3, a second adder 4, a PD controller 5, a multiplier 6, a first fixed parameter Setter 7, the first subtractor 8 and the first PID controller 9, the input end of the first function generator 1 is connected with the A input interface, the output end of the first function generator 1 is connected with the first of the first adder 2 The input terminal is connected, the output terminal of the first bias setter 3 is connected with the second input terminal of the first adder 2, the output terminal of the first adder 2 is connected with the first input terminal of the second adder 4, and the second The second input end of the adder 4 is conn...

Embodiment 2

[0087] Such as figure 2 As shown, in the primary fan control system with a hydraulic resistance governor in this embodiment, the hydraulic resistance governor control device also includes an average value calculator 20, and the average value calculator 20 is provided with two input terminal, the E input interface of the hydraulic resistance governor control device is connected to the first input end of the average calculator 20, and the F input interface of the hydraulic resistance governor control device is connected to the second input terminal of the average calculator 20 The output end of the average calculator 20 is connected with the positive value input end of the third subtractor 21 . The E input interface described in this embodiment is connected to the primary fan inlet baffle opening value command of the primary fan control system with a liquid resistance governor, and the F input interface is connected to another primary fan control system with a liquid resistance...

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Abstract

The invention discloses a control system and a control method of a primary fan with a liquid resistance speed regulator, belongs to the technical field of automatic control of the primary fan with the liquid resistance speed regulator and aims to solve the technical problems that the primary fan system of the boiler in the prior art has not been put into automatic control, operates in the manual state all the time and has influences on the stable and economical operation of the boiler. The control system comprises a primary fan inlet baffle control device and a liquid resistance speed regulator control device, wherein the primary fan inlet baffle control device comprises a first function generator and a first adding device; the input end of the first function generator is connected to an input interface A; the output end of the first function generator is connected to a first input end of the first adding device; the liquid resistance speed regulator control device comprises a second function generator and a third adding device; the input end of the second function generator is connected to an input interface B; the output end of the second function generator is connected to a first input end of the third adding device. Through the control system and the control method of the primary fan with the liquid resistance speed regulator, the advantage that the boiler can operate stably and economically can be exerted.

Description

technical field [0001] The invention belongs to the technical field of automatic control of a primary fan with a liquid resistance governor, and in particular relates to a control system and a control method for a primary fan with a liquid resistance governor. Background technique [0002] For a double furnace circulating fluidized bed boiler with pants structure, if it is equipped with a primary fan with a liquid resistance governor, the primary air control system is usually divided into two parts: primary air pressure control and primary air volume control. The primary air pressure is controlled by the hydraulic resistance governor. Due to the poor adjustment characteristics of the hydraulic resistance governor, it cannot be operated frequently. When the position of the liquid resistance governor exceeds 80%, it is easy to cause the fan to vibrate greatly and trip, resulting in the trip of the boiler. The primary air volume is controlled by the opening of the primary wind ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/28
Inventor 张丽香马元元杜艳生张培华王俊刚
Owner SHANXI UNIV
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