CN203148047U - Load regulation control system for biomass organic heat carrier boiler - Google Patents

Load regulation control system for biomass organic heat carrier boiler Download PDF

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Publication number
CN203148047U
CN203148047U CN 201320075305 CN201320075305U CN203148047U CN 203148047 U CN203148047 U CN 203148047U CN 201320075305 CN201320075305 CN 201320075305 CN 201320075305 U CN201320075305 U CN 201320075305U CN 203148047 U CN203148047 U CN 203148047U
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China
Prior art keywords
temperature
boiler
air
control system
heat
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Expired - Fee Related
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CN 201320075305
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Chinese (zh)
Inventor
朱活强
沈见胜
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Guangzhou Unite New Energy Science & Technology Co Ltd
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Guangzhou Unite New Energy Science & Technology Co Ltd
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Priority to CN 201320075305 priority Critical patent/CN203148047U/en
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Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a load regulation control system for a biomass organic heat carrier boiler. The load regulation control system for the biomass organic heat carrier boiler consists of an oil temperature loop module, a heat loop module, an air supply regulation module and an induced air regulation module. Oil supply temperature and heat dual loop control is adopted, and a biomass boiler with bigger delay and inertia can adapt to the requirement of load variation by the variation of the fuel amount so as to achieve the stable oil supply temperature; under the normal boiler working condition, on the basis that the thermal load is slowly changed with a range of +/-15%, the temperature of a heat conduction oil outlet can be controlled within 310+/-3DEG C; the oil supply temperature is firstly collected and is compared with the set oil supply temperature to judge the magnitude and direction of the frequency; then, the oil supply flow, the return oil temperature and the oil supply temperature are used for calculating the theoretical heat; two signals are simultaneously processed by a program controller processing module; and corresponding feeding amount output is executed. The load regulation control system for the biomass organic heat carrier boiler has the characteristics of stable oil temperature, no black smoke and stability in boiler load regulation.

Description

Organic biomass heat carrier boiler load regulation and control system
Technical field
The utility model relates to a kind of boiler control system, specifically relates to a kind of Load Regulation control system of organic biomass heat carrier boiler.
Background technology
Biomass boiler is the important channel that utilizes biomass energy.Boiler control system is a ring very important in the boiler plant various piece.Boiler control system is reasonable in design, can save a large amount of manpower and materials; Can make boiler and industrial production safety, stable operation.
China Patent No. CN95111747.5 discloses a kind of The Microcomputer Control Apparatus for Boiler and method, comprise the keyboard input, be used for gathering in real time and showing boiler operatiopn working parameters device, microcomputer control method utilizes the PID control principle, through sampling, computing, output several steps the boiler industrial process is served control, and can revise according to production requirement and regulate parameter to reach the Optimal Control effect.
In fact, biomass boiler is the needs that adapt to load variations with the variation of fuel quantity, and it has bigger delay and inertia, so needs certain conveying, burning and heat passing time after the quantity combusted change, just can be reflected to the variation on the temperature.The boiler combustion control system major part still adopts traditional PID control to regulate at present, but there is certain hysteresis quality in this PID in the middle of calculating, can not change fuel change fast, cause the temperature instability, it is excessive to fluctuate, make the industrial production can not normal operation, so it be not suitable on the biomass boiler load fluctuation is big and temperature requirement keeps relative stability the industrial production.
The utility model content
In order to solve the problem that prior art exists, the utility model provides a kind of quick change fuel quantity, improves fuel availability, satisfies the biomass boiler control system that load fluctuation is big and temperature requirement is stable.
In order to realize above purpose, the technical solution of the utility model is as follows: a kind of organic biomass heat carrier boiler load regulation and control system, formed by oily temperature loops module, heat return circuit module, air-supply adjustment module and air inducing adjustment module;
Described oily temperature loops module comprises oil temperature supplying sensor, oil temperature regulator and feed frequency regulator;
Described heat return circuit module comprises returning-oil temperature sensor, heat regulator, fuel supply flow rate sensor and feed frequency regulator;
Described air-supply adjustment module comprises oxygen analyser and air-supply frequency regulator;
Described air inducing adjustment module comprises combustion chamber draft sensor and air inducing frequency regulator.
Compared with prior art, owing to adopt oil temperature supplying and the control of heat double loop, can make to have bigger delay and inertia biomass boiler, lean on the variation of fuel quantity to adapt to the needs of load variations, thereby it be stable to reach oil temperature supplying.Under normal boiler working condition, with thermic load slowly change ± 15% basis on, the conduction oil outlet temperature can be controlled in: 310 ± 3 ℃.Gather oil temperature supplying earlier, compare with setting oil temperature supplying, judge frequency size direction, and then calculate theoretical heat by fuel supply flow rate and returning-oil temperature and oil temperature supplying etc., two signals are handled through the cyclelog processing module simultaneously, carry out corresponding feeding coal output.
The characteristics of this patent:
1, under the big situation of load fluctuation, accelerate fuel combustion speed, stablize oil temperature supplying.
2, air output and fuel are kept proper proportion, avoid the chimney over-emitting black exhaust, improve boiler efficiency and economy.
3, can eliminate air blast and change disturbance, keep combustion chamber draft stable, make boiler safety and economical operation.
4, adopt setting value to apply in a flexible way, under different operating modes, can make suitable correction, handled easily.
5, use the burst length to change output frequency, the motor gradual slow is changed, guarantee the motor stabilizing operation, avoid the excessively frequent motor speed that changes, make motor aging, guarantee each governing loop stable operation of boiler.
Description of drawings
Fig. 1 is the structural representation of control system.
Below, with preferred embodiment the utility model is further specifically described by reference to the accompanying drawings.
The specific embodiment
As shown in Figure 1, organic biomass heat carrier boiler load regulation and control system is made up of oily temperature loops module, heat return circuit module, air-supply adjustment module and air inducing adjustment module.
Oil temperature loops module: comprise oil temperature supplying sensor, oil temperature regulator and feed frequency regulator.Oil temperature regulator is set the oil temperature supplying value and is received the detection signal of oil temperature supplying sensor.The feed frequency regulator is set the feed frequency values and is also received oil temperature regulator and the signal of heat regulator, analyze back instruction batcher output feeding coal and output wind material than parameter to the frequency regulator of blowing.According to extraneous requirement, temperature need be set three parts, i.e. design temperature, ceiling temperature and lower limit temperature.On design temperature, carry out a feed output frequency, this frequency is setting value.When oil temperature supplying reduces from setting value, system will can namely add corresponding frequencies output on the setting value basis from required how many feeding coal burnings of the temperature that theory analysis goes out to reduce automatically, when changing frequency, export gradually by changing the burst length; When oil temperature supplying raises from setting value, system will can namely deduct corresponding frequencies output on the setting value basis from required how many feeding coal burnings of the temperature that theory analysis goes out to raise automatically, when changing frequency, export gradually by changing the burst length.Obtain signal after the oil temperature regulator conversion data by the oil temperature supplying sensor, and analyze comparison with set temperature value, ceiling temperature value and lower-limit temperature value, be input to frequency regulator and handle, send corresponding signal and give batcher, carry out corresponding feeding coal.
Heat return circuit module: comprise returning-oil temperature sensor, heat regulator, fuel supply flow rate sensor and frequency regulator.Heat regulator receives the detection signal of oil temperature supplying sensor, returning-oil temperature sensor and fuel supply flow rate sensor, analyzes the back output signal to the feed frequency regulator.Because during the load instantaneous variation, the oil temperature supplying variation shows relatively and lags behind, so according to how many feeding coal burnings of load heat gradient theory analysis needs, additional heat when giving urgency (this frequency will be carried out corresponding change in oily temperature control setting value), can adapt to the thermal change needs, thereby make oil temperature supplying stable.Obtain signal after the heat regulator conversion data by oil temperature supplying sensor and returning-oil temperature sensor and flow sensor, be input to frequency regulator and calculate heat, calculate theoretical feeding coal according to calorimeter, send corresponding signal and give batcher, carry out corresponding feeding coal.
This organic biomass heat carrier boiler load regulation and control system adopts the double loop module: oily temperature loops module and heat return circuit module, two return circuit modules share a feed frequency regulator.
Air-supply adjustment module: comprise oxygen analyser and air-supply frequency regulator.The air-supply frequency regulator set wind material ratio and receive the oxygen content of oxygen analyser and the wind material than parameter, analyze back output feedforward.The task of air output regulating system is exactly that the air output of boiler and fuel quantity are coordinated mutually, and this control adopts the wind material to coordinate mutually than with the oxygen content of air, and 1. the wind material is than being exactly that air output becomes certain ratio with fuel quantity, and this proportionality coefficient is setting value; 2. the air oxygen content detects data by oxygen analyser, these data is delivered in the digital Fuzzy Controller analyzed, the correct air output of regulating namely changes wind material ratio, makes it progressively approach the best air output of actual condition, can reach the high thermal efficiency of boiler, realize economical combustion.The feeding coal theory calculates institute's required airflow, the formation ratio, and namely wind material ratio calculates air volume signal according to the wind material than frequency tuned device by feeding system feeding coal output signal and gives air blast, carries out corresponding air output; And then be input to frequency regulator according to the signal that oxygen analyser obtains and carry out analyzing and testing oxygen content coefficient, general coefficient scope is 0~20%, air quantity and material amount proportioning the best when showing 11%, bigger when departing from this coefficient, the air-supply frequency regulator sends signal, change wind material ratio, make it progressively approach the best air output of actual condition.
Air inducing adjustment module: comprise combustion chamber draft sensor and air-supply frequency regulator.The air inducing frequency regulator is set the air-supply frequency values and is received detection signal and the feedforward of combustion chamber draft sensor, analyzes back instruction air-introduced machine output air output.
The task of this module is exactly to keep combustion chamber draft in allowing the scope that requires, and the air inducing amount must adapt with air output, and it is feedforward that this control is adopted with the air output, carries out corresponding output valve, and namely frequency setting value is coordinated mutually with the negative pressure setting value.Feedforward is that blowing at the big air output of carrying out when interval of set temperature value, ceiling temperature value and lower-limit temperature value three is feedforward, and the air inducing amount is carried out the corresponding frequencies setting value.Detect the negative pressure data and occur departing from when setting value when carrying out frequency setting value, the frequency of amendment setting value keeps combustion chamber draft to keep in allowed limits automatically, makes boiler safety and economical operation.Obtain signal by the combustion chamber draft sensor, be input to frequency regulator and handle, and analyze comparison with the negative pressure setting value, bigger when the negative pressure actual value departs from the negative pressure setting value, frequency regulator sends signal, changes frequency setting value, corresponding signal is given air-introduced machine, output air inducing amount.
Oxygen analyser: 1. can measure flue gas and the contained oxygen concentration of other incombustible gas in the combustion process, can reflect combustion position, improving efficiency of combustion has remarkable effect.When air output was excessive, though can fully burn, the flue gas excess air was bigger than normal, caused the thermal efficiency on the low side etc.; When air output was too small, the flue gas excess air was less than normal, and fuel is not finished burning, reduced the thermal efficiency, simultaneously also can over-emitting black exhaust etc.
2. mainly coordinate the proportioning between air quantity and the material amount, can suitably revise wind material ratio automatically.

Claims (1)

1. an organic biomass heat carrier boiler load regulation and control system is characterized in that: be made up of oily temperature loops module, heat return circuit module, air-supply adjustment module and air inducing adjustment module;
Described oily temperature loops module comprises oil temperature supplying sensor, oil temperature regulator and feed frequency regulator;
Described heat return circuit module comprises returning-oil temperature sensor, heat regulator, fuel supply flow rate sensor and feed frequency regulator;
Described air-supply adjustment module comprises oxygen analyser and air-supply frequency regulator;
Described air inducing adjustment module comprises combustion chamber draft sensor and air inducing frequency regulator.
CN 201320075305 2013-02-18 2013-02-18 Load regulation control system for biomass organic heat carrier boiler Expired - Fee Related CN203148047U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320075305 CN203148047U (en) 2013-02-18 2013-02-18 Load regulation control system for biomass organic heat carrier boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320075305 CN203148047U (en) 2013-02-18 2013-02-18 Load regulation control system for biomass organic heat carrier boiler

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CN203148047U true CN203148047U (en) 2013-08-21

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104482662A (en) * 2014-12-18 2015-04-01 广东绿壳新能源有限公司 Biogas conduction oil supply boiler control system device and control method
CN105318554A (en) * 2014-09-02 2016-02-10 刘艳琴 Conduction oil boiler control system and method
CN105333618A (en) * 2014-07-30 2016-02-17 上海星伦工业自动化技术有限公司 Energy-saving control system and device for coal-fired heat conduction oil boiler
CN108954285A (en) * 2018-09-13 2018-12-07 中国电子系统技术有限公司 A kind of Automatic Control Strategy and method of biomass water cooling vibrating grate boiler load
CN110043801A (en) * 2019-03-07 2019-07-23 青岛科技大学 A kind of crude oil heater and its control system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105333618A (en) * 2014-07-30 2016-02-17 上海星伦工业自动化技术有限公司 Energy-saving control system and device for coal-fired heat conduction oil boiler
CN105318554A (en) * 2014-09-02 2016-02-10 刘艳琴 Conduction oil boiler control system and method
CN104482662A (en) * 2014-12-18 2015-04-01 广东绿壳新能源有限公司 Biogas conduction oil supply boiler control system device and control method
CN104482662B (en) * 2014-12-18 2018-04-10 广东绿壳新能源有限公司 A kind of biological flue gas supplies heat conduction oil boiler furnace control system device and its control method
CN108954285A (en) * 2018-09-13 2018-12-07 中国电子系统技术有限公司 A kind of Automatic Control Strategy and method of biomass water cooling vibrating grate boiler load
CN110043801A (en) * 2019-03-07 2019-07-23 青岛科技大学 A kind of crude oil heater and its control system
CN110043801B (en) * 2019-03-07 2023-03-14 青岛科技大学 Crude oil heating furnace and control system thereof

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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: 20130821

Termination date: 20190218

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