CN201903047U - Liquid level regulating device of boiler drum - Google Patents

Liquid level regulating device of boiler drum Download PDF

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Publication number
CN201903047U
CN201903047U CN2011200931414U CN201120093141U CN201903047U CN 201903047 U CN201903047 U CN 201903047U CN 2011200931414 U CN2011200931414 U CN 2011200931414U CN 201120093141 U CN201120093141 U CN 201120093141U CN 201903047 U CN201903047 U CN 201903047U
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CN
China
Prior art keywords
liquid level
water
boiler
central controller
boiler drum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011200931414U
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Chinese (zh)
Inventor
蒋国璋
李世军
蒋庆宏
赵国锋
刘传萍
孙博锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUADIAN NEW ENERGY DEVELOPMENT Co Ltd OF GUANGZHOU HIGHER EDUCATION MEGA CENTER
Original Assignee
HUADIAN NEW ENERGY DEVELOPMENT Co Ltd OF GUANGZHOU HIGHER EDUCATION MEGA CENTER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by HUADIAN NEW ENERGY DEVELOPMENT Co Ltd OF GUANGZHOU HIGHER EDUCATION MEGA CENTER filed Critical HUADIAN NEW ENERGY DEVELOPMENT Co Ltd OF GUANGZHOU HIGHER EDUCATION MEGA CENTER
Priority to CN2011200931414U priority Critical patent/CN201903047U/en
Application granted granted Critical
Publication of CN201903047U publication Critical patent/CN201903047U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a liquid level regulating device of a boiler drum. The liquid level regulating device is characterized by comprising a boiler drum (1), a central controller (4), a plurality of water pumps (2) and a plurality of frequency converters (5), wherein a water inlet of the boiler drum (1) is connected with water outlets of the water pumps (2) through water inlet pipelines; the water outlets of the water pumps (2) are connected with a water storage tank; a plurality of differential pressure transmitters (3) are arranged in the boiler drum (1); signal output ends of the differential pressure transmitters (3) are connected with a signal input end of a central controller (4) respectively; and a control output end of the central controller (4) is connected with the water pumps (2) through the frequency converters (5). The liquid level regulating device of the boiler drum has the characteristics of high sensitivity in liquid level regulating and controlling and high regulating precision, and can save electrical energy and water source, prolong the service life, reduce complicated manual operation, and decrease maintenance work load.

Description

A kind of boiler-steam dome liquid level regulation device
Technical field
The utility model relates to a kind of liquid level regulation device, particularly a kind of boiler-steam dome liquid level regulation device.Be applicable to that enterprises such as energy source station, power plant use.Belong to the power industry equipment technical field.
Background technology
At present, in the production equipment of power plant or energy source station, drum is the important component part of boiler, the drum liquid level directly influences the security and the economy of boiler operatiopn, be the important index and the monitoring parameter of boiler operatiopn, it has reflected the equilibrium relation of boiler load and feedwater, and the too high or too low of drum liquid level all can cause very serious consequence.The drum liquid level is too high, and the steam moisture that enters superheater is increased, and gently then makes the superheater encrustation and causes that superheater is overheated to be burnt out, and is heavy then make the water entrained by steam that enters steam turbine cause turbine blade to burn out; The drum liquid level is low excessively, then may destroy the state of cyclic operation of water screen tube, causes water screen tube to burn out because of lack of water.In the prior art, the drum tank level control system is divided into three kinds: single pulse control system, doublepulse control system, three momentum control systems, all be to adopt control valve control water pump, it is low to exist liquid level to regulate control sensitivity, and degree of regulation is low, waste electric energy and the shortcoming of lacking in water resource, complex operation, maintenance difficult and service life.
The utility model content
The purpose of this utility model, be to have problems such as sensitivity is low, degree of regulation is low in order to solve prior art liquid-in-gas level controlling system, a kind of boiler-steam dome liquid level regulation device is provided, it is highly sensitive that this device has liquid level adjusting control, the characteristics that degree of regulation is high, can saves energy and service life of water resource, prolongation equipment, reduce many loaded down with trivial details manually-operateds, reduce maintenance load.
The purpose of this utility model can reach by following measure:
A kind of boiler-steam dome liquid level regulation device, its design feature is: comprise boiler-steam dome, central controller, some water pumps and several frequency converters, the water inlet of boiler-steam dome is connected with the delivery port of water pump by inlet channel, and the water inlet of water pump is connected with tank; Boiler-steam dome is connected with three, four or five differential pressure transmitters, and the signal output part of each differential pressure transmitter is connected with the signal input part of central controller respectively, and the control output end of central controller is connected with water pump by frequency converter.
A kind of embodiment of realizing the utility model purpose is: the quantity of described frequency converter is two, and is corresponding with the quantity of frequency converter, and the quantity of described water pump is two; The control signal output of central controller is connected with the control signal input of two frequency converters respectively, and each is connected each frequency converter with a water pump.
A kind of embodiment of realizing the utility model purpose is: the signal output part at central controller is connected with the drum liquid level display.
The beneficial effects of the utility model are:
The utility model is regulated the rotating speed of pump motor by frequency converter, replaces the effect of control valve, and the sensitivity that has improved controlled volume and controlled quentity controlled variable has reduced the measurement time lag, can make that the liquid level horizontal signal always changes in the set-point scope in the boiler-steam dome.Simultaneously, it adopts central processing unit to control, and is provided with drum liquid level display unit, having liquid level, to regulate control highly sensitive, and the advantage that degree of regulation is high can saves energy and service life of water resource, prolongation equipment, reduce many loaded down with trivial details manually-operateds, reduce maintenance load.
Description of drawings
Fig. 1 is the theory diagram of the utility model specific embodiment.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail:
Specific embodiment 1:
With reference to Fig. 1, present embodiment is made of boiler-steam dome 1, some water pumps 2, several differential pressure transmitters 3, central controller 4 and several frequency converters 5, the water inlet of boiler-steam dome 1 is connected by the delivery port of inlet channel with water pump 2, and the water inlet of water pump 2 is connected with tank; Differential pressure transmitter 3 is arranged in the boiler-steam dome 1, and the signal output part of each differential pressure transmitter 3 is connected with the signal input part of central controller 4 respectively, and the control output end of described central controller 4 is connected with water pump 2 by frequency converter 5 successively.
In the present embodiment:
The quantity of described differential pressure transmitter 3 is two.The quantity of described frequency converter 5 is two, and corresponding with it, the quantity of described water pump 2 is two; The control signal output of described central controller 4 is connected with the control signal input of two frequency converters 5 respectively, and each frequency converter 5 is connected with a water pump 2.
Be connected with and drum liquid level display unit 6 at the signal output part place of described central controller 4, the signal output part of central controller 4 connects the signal input part of drum liquid level display unit 6.
In the present embodiment, boiler-steam dome 1, some water pumps 2, several differential pressure transmitters 3, central controller 4 and several frequency converters 5 may adopt boiler-steam dome, water pump, differential pressure transmitter, central controller and the frequency converter of routine techniques respectively.
Operation principle of the present utility model:
By the liquid level in two differential pressure transmitters, the 3 detection boiler-steam domes 1, to detect liquid level signal and send to central processing unit 4, central processing unit 4 is averaged level value with the liquid level numerical value that two differential pressure transmitters 3 send over, and with this average level value with set level value and compare after, the output bias signal is to frequency converter 5, adjust the supply frequency of frequency converter 5 outputs by deviation signal control, thereby change water pump 2 rotating speeds; When the liquid level deviation is big, the supply frequency of frequency converter 5 outputs increases, water pump 2 rotating speeds also increase, and output also increases thereupon, along with dwindling of liquid level deviation, the supply frequency of frequency converter 5 outputs reduces gradually, water pump 2 rotating speeds also reduce gradually, and output also reduces thereupon, and this closed-loop control system realizes that by the repetitive process that constantly detects, constantly adjusts the level value in the boiler-steam dome is constant, make water pump regulate output automatically, reach the purpose of energy-saving and water-saving according to boiler-steam dome institute water requirement.
Specific embodiment 2:
The characteristics of present embodiment are: the quantity of described differential pressure transmitter 3 is three, and the signal output part of each differential pressure transmitter 3 is connected with the signal input part of central controller 4 respectively.Other are identical with specific embodiment 1.
Other embodiment:
The quantity of described differential pressure transmitter 3 is four or five, and the signal output part of each differential pressure transmitter 3 is connected with the signal input part of central controller 4 respectively.
The above; it only is the preferable specific embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, all belonged to protection domain of the present utility model.

Claims (3)

1. boiler-steam dome liquid level regulation device, it is characterized in that: comprise boiler-steam dome (1), central controller (4), some water pumps (2) and several frequency converters (5), the water inlet of boiler-steam dome (1) is connected by the delivery port of inlet channel with water pump (2), and the water inlet of water pump (2) is connected with tank; Boiler-steam dome (1) is connected with three, four or five differential pressure transmitters (3), the signal output part of each differential pressure transmitter (3) is connected with the signal input part of central controller (4) respectively, and the control output end of central controller (4) is connected with water pump (2) by frequency converter (5).
2. a kind of boiler-steam dome liquid level regulation device according to claim 1 is characterized in that: the quantity of described frequency converter (5) is two, and is corresponding with the quantity of frequency converter (5), and the quantity of described water pump (2) is two; The control signal output of central controller (4) is connected with the control signal input of two frequency converters (5) respectively, and each is connected each frequency converter (5) with a water pump (2).
3. a kind of boiler-steam dome liquid level regulation device according to claim 1 is characterized in that: the signal output part at central controller (4) is connected with drum liquid level display (6).
CN2011200931414U 2011-03-31 2011-03-31 Liquid level regulating device of boiler drum Expired - Fee Related CN201903047U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200931414U CN201903047U (en) 2011-03-31 2011-03-31 Liquid level regulating device of boiler drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200931414U CN201903047U (en) 2011-03-31 2011-03-31 Liquid level regulating device of boiler drum

Publications (1)

Publication Number Publication Date
CN201903047U true CN201903047U (en) 2011-07-20

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CN2011200931414U Expired - Fee Related CN201903047U (en) 2011-03-31 2011-03-31 Liquid level regulating device of boiler drum

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607012A (en) * 2012-04-01 2012-07-25 昆明理工大学 Energy-saving device and control method for industrial boiler water feeding system
CN102853421A (en) * 2012-09-21 2013-01-02 罗泽云 Energy economizer control system and method
CN103234489A (en) * 2013-04-15 2013-08-07 东南大学 Calibration system and calibration method for water film thickness of road surface condition detection sensor
CN104154526A (en) * 2014-08-06 2014-11-19 广西三威林产工业有限公司 Steam generator feed water control device
CN104344048A (en) * 2014-10-10 2015-02-11 中国神华能源股份有限公司 Liquid level regulating device and liquid level regulating method
CN105402718A (en) * 2015-11-26 2016-03-16 湖南华信稀贵科技有限公司 Water supply system of fuming furnace waste heat boiler

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607012A (en) * 2012-04-01 2012-07-25 昆明理工大学 Energy-saving device and control method for industrial boiler water feeding system
CN102853421A (en) * 2012-09-21 2013-01-02 罗泽云 Energy economizer control system and method
CN103234489A (en) * 2013-04-15 2013-08-07 东南大学 Calibration system and calibration method for water film thickness of road surface condition detection sensor
CN104154526A (en) * 2014-08-06 2014-11-19 广西三威林产工业有限公司 Steam generator feed water control device
CN104344048A (en) * 2014-10-10 2015-02-11 中国神华能源股份有限公司 Liquid level regulating device and liquid level regulating method
CN105402718A (en) * 2015-11-26 2016-03-16 湖南华信稀贵科技有限公司 Water supply system of fuming furnace waste heat boiler

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110720

Termination date: 20160331

CF01 Termination of patent right due to non-payment of annual fee