CN105091026A - Combustion device outlet residue oxygen volume control method and system - Google Patents

Combustion device outlet residue oxygen volume control method and system Download PDF

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Publication number
CN105091026A
CN105091026A CN201410191217.5A CN201410191217A CN105091026A CN 105091026 A CN105091026 A CN 105091026A CN 201410191217 A CN201410191217 A CN 201410191217A CN 105091026 A CN105091026 A CN 105091026A
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CN
China
Prior art keywords
burnt
completely
unit volume
sample
oxygen demand
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Pending
Application number
CN201410191217.5A
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Chinese (zh)
Inventor
张峰
秦强
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Shenhua Group Corp Ltd
National Institute of Clean and Low Carbon Energy
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Shenhua Group Corp Ltd
National Institute of Clean and Low Carbon Energy
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Application filed by Shenhua Group Corp Ltd, National Institute of Clean and Low Carbon Energy filed Critical Shenhua Group Corp Ltd
Priority to CN201410191217.5A priority Critical patent/CN105091026A/en
Publication of CN105091026A publication Critical patent/CN105091026A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a combustion device outlet residue oxygen volume control method and system. The method comprises the following steps that the unit volume complete combustion oxygen demand of objects to be combusted is obtained through burning samples of the objects to be combusted; the unit volume complete combustion oxygen demand of the objects to be combusted is used as one input parameter to be input into a control system of an industrial combustion device, so that the objects to be combusted are subject to a complete combustion reaction in the industrial combustion device. The method and the system have the advantages that the complete combustion oxygen demand of the unit volume objects to be combusted is obtained in advance by using the reaction of samples and the air in a test combustion device, and the air inlet volume of the industrial combustion device is controlled according to the complete burning oxygen demand of the unit volume objects to be combusted, so that the industrial combustion residual oxygen volume can be fast maintained at an ideal level.

Description

A kind of burner outlet remaining oxygen control method and system
Technical field
The present invention relates to automation field, particularly, relate to a kind of burner outlet remaining oxygen control method and system.
Background technology
In the technological process of such as brown coal upgrading, thermal source that is dry or pyrolyzing coal can produce a large amount of high-temperature flue gas by burner.For the sake of security, in the course of the work, the remaining oxygen of its outlet is more low better for burner.The oxidizing fire of the high coal that can cause in follow-up flow process of remaining oxygen, even likely in the danger that electric tar link is blasted.Therefore, the oxygen content being necessary very much to provide new control program to export to reduce burner.
Summary of the invention
The object of this invention is to provide a kind of burner outlet remaining oxygen control method and system, to reduce the remaining oxygen of industrial burning device outlet, improve industrial security.
To achieve these goals, the invention provides a kind of burner outlet remaining oxygen control method, the method comprises: the unit volume obtaining material to be burnt by burning material to be burnt sample is burnt oxygen demand completely; Oxygen demand of the unit volume of described material to be burnt being burnt completely is input in the control system of industrial burning device as one of input parameter, makes described material to be burnt, in described industrial burning device, complete combustion reaction occur.
Preferably, described material to be burnt is gaseous state combustible.
Preferably, the control system of described industrial burning device is Feedforward-feedback control system, and described unit volume burns oxygen demand completely as in the described Feedforward-feedback control system of one of feedforward input parameter input.
Preferably, material to be burnt sample has thermal source at test burn device, and the volume of wherein said test burn device is between 0.001mL to 0.5L.
Preferably, described test burn device comprises test burn device, material to be burnt sample flow meter, mass air flow sensor, remaining oxygen analyzer and material to be burnt sample flow controller and/or air flow controller; The method comprises material to be burnt sample flow controller and/or air flow controller adjusts material to be burnt sample flow by the signal that remaining oxygen analyzer feeds back and/or air mass flow is burnt completely to make described material to be burnt sample, the oxygen demand thus the unit volume obtaining material to be burnt is burnt completely.
The invention provides a kind of burner outlet remaining oxygen control system, this system comprises test burn device, industrial burning device and control device; Described experimental combustion device, for the material to be burnt sample that burns; Described industrial burning device, for the material to be burnt that burns; Described control device, for oxygen demand of being burnt completely by the unit volume of burning material to be burnt sample acquisition material to be burnt; Oxygen demand of the unit volume of described material to be burnt being burnt completely controls described industrial burning device as input parameter, makes described material to be burnt, in described industrial burning device, complete combustion reaction occur.
Preferably, described material to be burnt is gaseous state combustible.
Preferably, described control device comprises Feedforward-feedback control system, and described unit volume burns oxygen demand completely as in the described Feedforward-feedback control system of one of feedforward input parameter input.
Preferably, described test burn device has thermal source, and the volume of wherein said test burn device is between 0.001mL to 0.5L.
Preferably, described test burn device comprises test burn device, material to be burnt sample flow meter, mass air flow sensor, remaining oxygen analyzer and material to be burnt sample flow controller and/or air flow controller; The signal that described control device is used for being fed back by remaining oxygen analyzer adjusts material to be burnt sample flow and/or air mass flow is burnt completely to make described material to be burnt sample, the oxygen demand thus the unit volume obtaining material to be burnt is burnt completely.
The present invention to be burnt oxygen demand completely by utilizing sample and air reaction to obtain unit volume material to be burnt in advance in test burn device, and the air inlet of the oxygen demand control industrial burner that burns completely according to unit volume material to be burnt, thus rapidly the remaining oxygen of industrial combustion can be remained on desirable level.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is burner provided by the invention outlet remaining oxygen control method flow chart;
Fig. 2 is burner provided by the invention outlet remaining oxygen control system schematic diagram;
Fig. 3 is test burn device schematic diagram provided by the invention;
Fig. 4 is industrial burning device schematic diagram provided by the invention.
Description of reference numerals
100 control device 200 test burn devices
300 industrial burning device 101 pyrolysis gas sample flow meters
102 pyrolysis gas sample control valve 103 first mass air flow sensor
104 first air flow control valve 105 test burn devices
The 106 additional combustion-supporting energy 107 remaining oxygen analyzers
108 pyrolysis gas sample flow controller 109 first air flow controllers
110 unit volume oxygen demand 111 second mass air flow sensor
112 pyrolysis gas flowmeter 113 the 3rd flow controllers
114 remaining oxygen controller 115 industrial burners
116 pyrolysis gas and air ratio 117 adder
118 combustion supporting burners and ignition system 119 second air flow control valve
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In order to reduce the remaining oxygen of industrial burner outlet, the invention provides burner outlet remaining oxygen control method, as shown in Figure 1, the method comprises: the unit volume obtaining material to be burnt by burning material to be burnt sample is burnt oxygen demand completely; Oxygen demand of the unit volume of described material to be burnt being burnt completely is input in the control system of industrial burning device as one of input parameter, makes described material to be burnt, in described industrial burning device, complete combustion reaction occur.So-calledly herein burn completely, after referring to that the material to be burnt sample of such as pyrolysis gas sample is burned, remaining oxygen is in the threshold range preset, and such as residual oxygen volume accounts for 1% of cumulative volume after reaction.Ideally, the remaining oxygen of industrial burner outlet should remain on 0.In order to reach this object, the present invention first determines under the condition of predetermined remaining oxygen (such as 0) by test, the amount of oxygen needed for the complete combustion reaction of material to be burnt sample of unit volume.In the present invention, material to be burnt can be imflammable gas, is described in the present invention using pyrolysis gas as the example of material to be burnt.Pyrolysis gas and air are gas, can be measured by flowmeter, and remaining oxygen test burn device being exported by the adjustment control valve of pyrolysis gas and the control valve of air reaches predetermined value, such as 0.Now pyrolysis gas sample occurs to burn completely, can obtain unit volume pyrolysis gas to burn completely oxygen demand by the numerical value of pyrolysis gas flowmeter and mass air flow sensor and the aerial cubage of oxygen.In general, oxygen volume duty gas cumulative volume 21%.To burn completely oxygen demand obtaining unit volume pyrolysis gas, oxygen demand of this unit volume pyrolysis gas can being burnt completely controls as input parameter industrial burner, and the pyrolysis gas in industrial burner is burnt completely.For the ease of controlling the flow of pyrolysis gas sample, pyrolysis gas or air, burner is tested and industrial burning device all comprises flowmeter and control valve in the present invention, the control valve adopted can be electrically-controlled valve, and above-mentioned flowmeter and control valve all can be commercially.In order to obtain this ratio rapidly, the volume of test burn device should be as far as possible little, and such as, between 0.001mL to 0.5L, in order to mate with test burn device, the flowmeter adopted in test burn device should accurately measure tiny flow quantity.Those skilled in the art can design the test burn device with above-mentioned volume according to prior art, or commercially have the test burn device of above-mentioned volume.In addition, test burn utensil has the additional combustion-supporting energy, can be heated to the temperature that pyrolysis gas sample chance oxygen can be made namely to burn by modes such as electrical heating or auxiliary fuel heating.
Fig. 2 shows burner provided by the invention outlet remaining oxygen control system schematic diagram, and this system comprises test burn device 200, industrial burning device 300 and control device 100; Described experimental combustion device 200, for the material to be burnt sample that burns; Described industrial burning device 300, for the material to be burnt that burns; Described control device 100, for oxygen demand of being burnt completely by the unit volume of burning material to be burnt sample acquisition material to be burnt; Oxygen demand of the unit volume of described material to be burnt being burnt completely controls described industrial burning device as input parameter, makes described material to be burnt, in described industrial burning device, complete combustion reaction occur.
The structure testing burner 200 and industrial burning device 300 is described in the present invention below in detail for pyrolysis gas as material to be burnt.Fig. 3 shows the structure of test burn device 200, comprises test burn device 105, pyrolysis gas sample flow meter 101, pyrolysis gas sample control valve 102, first mass air flow sensor 103, first air flow control valve 104, remaining oxygen analyzer 107, pyrolysis gas sample flow controller 108, first air flow controller 109.Pyrolysis gas sample enters test burn device 105 by pyrolysis gas sample flow meter 101 and pyrolysis gas sample control valve 102, air enters test burn device 105 by the first mass air flow sensor 103 and the first air flow control valve 104, the two is in test burn device 105 combustion of high temperature, remaining oxygen analyzer 107 can analyze the remaining oxygen in tail gas, if remaining oxygen undesirable (such as remaining oxygen is not 0), pyrolysis gas sample flow controller 108 can adjust pyrolysis gas sample control valve 102 and/or the first air flow controller 109 can adjust the first air flow control valve 104, until remaining oxygen meets the requirements (such as remaining oxygen is 0).Now, the percentage that can obtain the value of pyrolysis gas sample flow meter, the value of the first mass air flow sensor and oxygen volume duty gas volume obtains unit volume pyrolysis gas and to burn completely oxygen demand 110.Fig. 4 shows the structure of industrial burning device, comprises pyrolysis gas flowmeter 112, second mass air flow sensor 111, second air flow control valve 119, industrial burner 115, the combustion supporting burner fixing calorific value and ignition system 118, remaining oxygen analyzer 107, remaining oxygen controller 114, the 3rd flow controller 113, adder 117.Pyrolysis gas enters industrial burner 115 by pyrolysis gas flowmeter 112, and air enters industrial burner by the second mass air flow sensor 111 and the second air flow control valve 119.In one embodiment of the invention, industrial burning device 300 comprises the control system being preferably integrated into control device 100, is preferably Feedforward-feedback control system, but is not limited thereto.In this embodiment, 3rd flow controller 113, adder 117, remaining oxygen analyzer 107, and remaining oxygen controller 114 constitutes Feedforward-feedback control system, oxygen demand 110 of being burnt completely by the unit volume pyrolysis gas obtained in test burn device is input in Feedforward-feedback control system as one of input parameter adding device, pyrolysis gas and air ratio 116 can be obtained by pyrolysis gas flowmeter 112 and the second mass air flow sensor 111, remaining oxygen can be obtained by remaining oxygen analyzer 107, Feedforward-feedback control system so according to these values control industrial burning device, can be adjusted to by the flow of air as soon as possible can the combustion heat degree of venting one's spleen completely.In whole control procedure, if the remaining oxygen that remaining oxygen analyzer obtains is not 0, can be adjusted further by feedback procedure, to guarantee that remaining oxygen that remaining oxygen analyzer records is for 0 as much as possible.It should be noted that, Feedforward-feedback control system shown in Fig. 4 only exemplarily, those skilled in the art can design different Feedforward-feedback control systems according to prior art, as long as meet, unit volume material to be burnt are burnt oxygen demand completely as feedforward input parameter.
By above-mentioned scheme, the present invention can adjust the air capacity of input industrial burner rapidly, to make the pyrolysis gas of input industrial burner be burnt completely, thus the remaining oxygen that industrial burner is exported maintains desirable level, such as, maintain the level that remaining oxygen is 0.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (10)

1. a burner outlet remaining oxygen control method, it is characterized in that, the method comprises:
The unit volume obtaining material to be burnt by burning material to be burnt sample is burnt oxygen demand completely;
Oxygen demand of the unit volume of described material to be burnt being burnt completely is input in the control system of industrial burning device as one of input parameter, makes described material to be burnt, in described industrial burning device, complete combustion reaction occur.
2. method according to claim 1, is characterized in that, described material to be burnt is gaseous state combustible.
3. method according to claim 1, is characterized in that, the control system of described industrial burning device is Feedforward-feedback control system, and described unit volume burns oxygen demand completely as in the described Feedforward-feedback control system of one of feedforward input parameter input.
4. the method according to claim 1,2 or 3, is characterized in that, material to be burnt sample has thermal source at test burn device, and the volume of wherein said test burn device is between 0.001mL to 0.5L.
5. method according to claim 4, is characterized in that, described test burn device comprises test burn device, material to be burnt sample flow meter, mass air flow sensor, remaining oxygen analyzer and material to be burnt sample flow controller and/or air flow controller; The method comprises material to be burnt sample flow controller and/or air flow controller adjusts material to be burnt sample flow by the signal that remaining oxygen analyzer feeds back and/or air mass flow is burnt completely to make described material to be burnt sample, the oxygen demand thus the unit volume obtaining material to be burnt is burnt completely.
6. a burner outlet remaining oxygen control system, it is characterized in that, this system comprises test burn device, industrial burning device and control device;
Described experimental combustion device, for the material to be burnt sample that burns;
Described industrial burning device, for the material to be burnt that burns;
Described control device, for oxygen demand of being burnt completely by the unit volume of burning material to be burnt sample acquisition material to be burnt; Oxygen demand of the unit volume of described material to be burnt being burnt completely controls described industrial burning device as input parameter, makes described material to be burnt, in described industrial burning device, complete combustion reaction occur.
7. system according to claim 6, is characterized in that, described material to be burnt is gaseous state combustible.
8. system according to claim 7, is characterized in that, described control device comprises Feedforward-feedback control system, and described unit volume burns oxygen demand completely as in the described Feedforward-feedback control system of one of feedforward input parameter input.
9. the system according to claim 6,7 or 8, is characterized in that, described test burn device has thermal source, and the volume of wherein said test burn device is between 0.001mL to 0.5L.
10. the system according to claim 6,7 or 8, it is characterized in that, described test burn device comprises test burn device, material to be burnt sample flow meter, mass air flow sensor, remaining oxygen analyzer and material to be burnt sample flow controller and/or air flow controller; The signal that described control device is used for being fed back by remaining oxygen analyzer adjusts material to be burnt sample flow and/or air mass flow is burnt completely to make described material to be burnt sample, the oxygen demand thus the unit volume obtaining material to be burnt is burnt completely.
CN201410191217.5A 2014-05-07 2014-05-07 Combustion device outlet residue oxygen volume control method and system Pending CN105091026A (en)

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Application Number Priority Date Filing Date Title
CN201410191217.5A CN105091026A (en) 2014-05-07 2014-05-07 Combustion device outlet residue oxygen volume control method and system

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Application Number Priority Date Filing Date Title
CN201410191217.5A CN105091026A (en) 2014-05-07 2014-05-07 Combustion device outlet residue oxygen volume control method and system

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CN105091026A true CN105091026A (en) 2015-11-25

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003222307A (en) * 2002-01-31 2003-08-08 Babcock Hitachi Kk Multi-fuel combustion method and device
CN1800848A (en) * 2006-01-16 2006-07-12 张东平 Combustion type gas heat value measuring method and heat value meter thereof
CN101876449A (en) * 2009-11-17 2010-11-03 武汉钢铁(集团)公司 Method of controlling oxygen air-flowing environment in heating furnace
CN102654286A (en) * 2012-05-18 2012-09-05 无锡龙山科技有限公司 Intelligent dynamic combustion atmosphere controller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003222307A (en) * 2002-01-31 2003-08-08 Babcock Hitachi Kk Multi-fuel combustion method and device
CN1800848A (en) * 2006-01-16 2006-07-12 张东平 Combustion type gas heat value measuring method and heat value meter thereof
CN101876449A (en) * 2009-11-17 2010-11-03 武汉钢铁(集团)公司 Method of controlling oxygen air-flowing environment in heating furnace
CN102654286A (en) * 2012-05-18 2012-09-05 无锡龙山科技有限公司 Intelligent dynamic combustion atmosphere controller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
黄俊东: ""氧化锆分析仪在燃烧控制中的应用"", 《中国仪器仪表》 *

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Application publication date: 20151125