CN101344265A - Method for measuring combustion on-line oxygen content of travelling grate boilers - Google Patents
Method for measuring combustion on-line oxygen content of travelling grate boilers Download PDFInfo
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- CN101344265A CN101344265A CNA2007100251796A CN200710025179A CN101344265A CN 101344265 A CN101344265 A CN 101344265A CN A2007100251796 A CNA2007100251796 A CN A2007100251796A CN 200710025179 A CN200710025179 A CN 200710025179A CN 101344265 A CN101344265 A CN 101344265A
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- oxygen content
- flue gas
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- collection point
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Abstract
The invention relates to a measurement method of combustion on-line oxygen content of a traveling grate boiler. The oxygen content of flue gas in various sections of a furnace chamber can be conveniently measured by the method, therefore, input air can be provided against different sections, and the combustion efficiency of coal can be ensured. The measurement method of the invention is characterized in that: flue gas collection ports are respectively arranged on furnace walls which are corresponding to various air distribution chambers, part of the flue gas is collected at intervals of one time period and the oxygen content thereof is measured, Nn is the oxygen content of the flue gas at the Nth collection point, Qn is the flue gas amount at the Nth collection point, N<total> is the total average oxygen content of the boiler flue gas, and N<total> is equal to (N<1> multiplied by Q<1> plus N<2> multiplied by Q<2> plus N<3> multiplied by Q<3> plus ellipsis Nn multiplied by Qn) divided by (Q<1> plus Q<2> plus Q<3> plus ellipsis Qn).
Description
(1) technical field
The present invention relates to boiler combustion measure of oxygen content technical field, be specially the measuring method of combustion on-line oxygen content of travelling grate boilers.
(2) background technology
Coal-burning boiler in use for the energy-conservation air output that needs the control burner hearth, improves burning of coal efficient as far as possible, and air output is little, and the amount of oxygen is low, and coal combustion is incomplete, and air output is big, and the temperature in the burner hearth descends, and coal burns not saturating.So in use strict in the industry control air output is to improve burning of coal efficient.Oxygen content determines in the flue gas and boiler air-supply volume is according to discharging, and the flue gas oxygen content of measuring is the mean value of the inner flue gas oxygen content of whole burner hearth, can't be at the different parts air distribution of burner hearth, and the efficiency of combustion of fuel is low.
(3) summary of the invention
At the problems referred to above, the invention provides the measuring method of combustion on-line oxygen content of travelling grate boilers, can measure the flue gas oxygen content of each section of burner hearth easily by this method, can provide air quantity at different sections like this, guarantee burning of coal efficient.
The solution of the present invention is such: it is characterized in that: on the furnace wall corresponding with each distribution plenum the flue gas acquisition port is set respectively, every a period collecting part flue gas, measure its oxygen content, Nn is the flue gas oxygen content of collection point, n place, Qn is the exhaust gas volumn of collection point, n place, N
AlwaysBe the total average oxygen content of boiler smoke,
N
Always=(N
1Q
1+ N
2Q
2+ N
3Q
3+ ... NnQn)/(Q
1+ Q
2+ Q
3+ ... Qn).
Adopt said method, can gather at any time, detect at any time, control the air output of whole burner hearth according to the total average oxygen content of boiler smoke, the air output that distributes each distribution plenum again according to the flue gas oxygen content of each collection point, guarantee that each stove section coal combustion is complete, thereby avoided only gathering in the prior art the total flue gas average oxygen content of boiler, can't be at the different parts air distribution of burner hearth, the shortcoming that the efficiency of combustion of fuel is low.
(4) description of drawings
Fig. 1 is the schematic diagram of each collection point of the present invention.
(5) specific embodiment
Below in conjunction with Fig. 1 implementation process of the present invention is described:
With distribution plenum 1,2,3 ... flue gas collection point (1), (2) (3) are set respectively on the furnace wall of N correspondence ... (N), every a period collecting part flue gas, measure each collection point flue gas oxygen content, Nn is the flue gas oxygen content of collection point, n place, Qn is the exhaust gas volumn of collection point, n place, N
AlwaysBe the total average oxygen content of boiler smoke, N
Always=(N
1Q
1+ N
2Q
2+ N
3Q
3+ ... NnQn)/(Q
1+ Q
2+ Q
3+ ... Qn), according to N
AlwaysDetermine total air output of boiler, determine the air output of each distribution plenum then according to the flue gas oxygen content of each collection point, with the air output and the actual demand in each stage of the burner hearth coupling of protecting each distribution plenum.
Claims (1)
1, the measuring method of combustion on-line oxygen content of travelling grate boilers, it is characterized in that: on the furnace wall corresponding, the flue gas acquisition port is set respectively with each distribution plenum, every a period collecting part flue gas, measure its oxygen content, Nn is the flue gas oxygen content of collection point, n place, Qn is the exhaust gas volumn of collection point, n place, N
AlwaysBe the total average oxygen content of boiler smoke, N
Always=(N
1Q
1+ N
2Q
2+ N
3Q
3+ ... NnQn)/(Q
1+ Q
2+ Q
3+ ... Qn).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100251796A CN101344265A (en) | 2007-07-10 | 2007-07-10 | Method for measuring combustion on-line oxygen content of travelling grate boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100251796A CN101344265A (en) | 2007-07-10 | 2007-07-10 | Method for measuring combustion on-line oxygen content of travelling grate boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101344265A true CN101344265A (en) | 2009-01-14 |
Family
ID=40246323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100251796A Pending CN101344265A (en) | 2007-07-10 | 2007-07-10 | Method for measuring combustion on-line oxygen content of travelling grate boilers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101344265A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728830A (en) * | 2015-04-01 | 2015-06-24 | 上海卫源节能环保科技有限公司 | Compound recycling low-nitrogen combustion method for chain boiler |
| CN105531538A (en) * | 2013-09-18 | 2016-04-27 | 阿尔斯通技术有限公司 | Oxy-fired boiler unit with three combustion zones, and method of operating the same |
-
2007
- 2007-07-10 CN CNA2007100251796A patent/CN101344265A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105531538A (en) * | 2013-09-18 | 2016-04-27 | 阿尔斯通技术有限公司 | Oxy-fired boiler unit with three combustion zones, and method of operating the same |
| CN105531538B (en) * | 2013-09-18 | 2018-08-14 | 通用电器技术有限公司 | There are three the combustion oxygen type boiler unit of combustion zone and its operating methods for tool |
| CN104728830A (en) * | 2015-04-01 | 2015-06-24 | 上海卫源节能环保科技有限公司 | Compound recycling low-nitrogen combustion method for chain boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090114 |