CN201903047U - Liquid level regulating device of boiler drum - Google Patents
Liquid level regulating device of boiler drum Download PDFInfo
- 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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- liquid level
- water
- boiler
- central controller
- boiler drum
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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
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).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN2011200931414U CN201903047U (en) | 2011-03-31 | 2011-03-31 | Liquid level regulating device of boiler drum |
Applications Claiming Priority (1)
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CN2011200931414U CN201903047U (en) | 2011-03-31 | 2011-03-31 | Liquid level regulating device of boiler drum |
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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)
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 |
-
2011
- 2011-03-31 CN CN2011200931414U patent/CN201903047U/en not_active Expired - Fee Related
Cited By (6)
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 | ||
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20160331 |
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CF01 | Termination of patent right due to non-payment of annual fee |