CN205402784U - Automatic negative -pressure firing ware of surplus coefficient of adjustment air - Google Patents
Automatic negative -pressure firing ware of surplus coefficient of adjustment air Download PDFInfo
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- CN205402784U CN205402784U CN201620119018.8U CN201620119018U CN205402784U CN 205402784 U CN205402784 U CN 205402784U CN 201620119018 U CN201620119018 U CN 201620119018U CN 205402784 U CN205402784 U CN 205402784U
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Abstract
Automatic negative -pressure firing ware of surplus coefficient of adjustment air, mainly by furnace, the PLC controller, combustor and ambient temperature detector are constituteed, set up pressure sensor in the furnace, set up adjusting the bezel in furnace's the chimney, set up air volume regulator in the air intake of combustor, set up flowmeter gentleness quantity adjustor in furnace's gas intake pipe, the ambient temperature detector, adjusting the bezel, pressure sensor, air volume regulator, flowmeter gentleness quantity adjustor link to each other with the PLC controller respectively. The utility model discloses but the surplus coefficient of device greatly reduced air has realized that the negative pressure stove reaches the combustion efficiency of forced draft combustor, and the stove that not only can improve current negative pressure stove is imitated, can enlarge using widely of negative pressure stove even, because the negative pressure stove does not need the air -blower to power consumption has been reduced.
Description
Technical field
This utility model relates to a kind of negative-pressure firing device, is specifically related to the negative-pressure firing device of a kind of automatic adjustment coefficient of excess air.
Background technology
Needing combustion air during burning, provide (forced ventilation) typically via aerator, if chimney is tall and big, captivation is strong, it is possible to without aerator, and such boiler is called negative pressure stove.Because having inhomogeneities when fuel and air mixing, for ensureing that fuel makes full use of, amount of supplied air is more more than calculated value, is called that coefficient of excess air, the coefficient of excess air of national regulations gas burner are 1.2.Negative-pressure firing relies on tall and big chimney to produce captivation, the change of the environment impact on tall and big chimney, it is far longer than the common chimney of force ventilated burner, during for ensureing that air capacity is minimum, fuel can make full use of, and has to increase coefficient of excess air during debugging, and some oil fields specify that the standard of the coefficient of excess air of negative pressure stove is 1.6, actually detected have up to 1.7 or 1.8, cause negative pressure stove stove effect very low.Such as the coefficient of excess air 1.6 of negative pressure burner, the ratio coefficient of excess air 1.2 of forced-draft burner, add 1/3rd, say, that it is dispensable that fuel consumption adds 2.9% these fuel consumptions, should reduce.Current negative-pressure firing device adopts zirconium oxide on-line monitoring, O in detection flue gas mostly2Content, if O2Content increases, illustrate that extraneous factor impact causes air capacity to increase, control system can damper baffle plate, reducing intake, this way can effectively revise the extraneous factor impact on combustion-supporting air quantity, but zirconic costly, life-span is very short, within being typically in 1 year, cost performance is undesirable, it is necessary to find a better way.
Utility model content
This utility model provides the negative-pressure firing device of a kind of automatic adjustment coefficient of excess air, and the coefficient of excess air height existed to solve prior art causes the problem that negative pressure stove efficiency of combustion is low.
This utility model solves its technical problem and be the technical scheme is that
A kind of negative-pressure firing device of automatic adjustment coefficient of excess air, mainly it is made up of burner hearth, PLC, burner and ambient temperature sensor, pressure transducer is set in burner hearth, the chimney of burner hearth arranges controllable register, the air inlet of burner arranges blast regulator, arranging effusion meter and air volume regulator on the gas inlet pipe of burner hearth, ambient temperature sensor, controllable register, pressure transducer, blast regulator, effusion meter are connected with PLC respectively with air volume regulator.
Operation principle of the present utility model is:
The flue gas that combustion air and burning produce, has certain resistance during by chimney, chimney produces again certain captivation.If resistance ratios captivation is big, the pressure of burner hearth is just high than atmospheric pressure, and it is how many how many height is called back pressure, and unit is Pa；If resistance ratios captivation is little, the pressure of burner hearth just forces down than air, is called for short negative pressure.Extraneous factor affects the captivation of chimney, also just have impact on the pressure of burner hearth, by detecting the change of furnace pressure, and then regulation and control furnace pressure, it is possible to revise the extraneous factor impact on combustion-supporting air quantity, reduce coefficient of excess air, improve negative-pressure firing efficiency.Affect six factors of furnace pressure: exhaust gas temperature and ambient temperature are principal element；Gas flow and combustion air flow are modifying factor；Blow and air humidity is uncontrollable factor.Principal element and modifying factor can know concrete numerical value by detection and setting value, and by calculating furnace pressure, we have been set up the mathematical model of several variable by experiment, have found Changing Pattern.PLC, by detecting the change of burner hearth back pressure, adjusts flue damper automatically, controls combustion air flow, it is ensured that sufficient combustion, it is possible to makes negative pressure stove reach the national standard of forced-draft burner, solves the difficult problem that negative pressure stove efficiency of combustion is low.Specific practice is mainly the Mathematical Models of PLC, and transformation chimney regulating fender is automatically adjust, and increases the detecting device of heating furnace burner hearth back pressure simultaneously, arranges ambient temperature detection device and provide corrected parameter to PLC.
This utility model device can be substantially reduced coefficient of excess air, achieve negative pressure stove and reach the efficiency of combustion of forced-draft burner, be not only able to improve the stove effect of existing negative pressure stove, it might even be possible to expand promoting the use of of negative pressure stove, because negative pressure stove does not need aerator, decrease power consumption.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further illustrated.
Fig. 1 is the structural representation of this utility model device.
1 burner hearth, 2PLC controller, 3 burners, 4 ambient temperature sensor, 5 chimneys, 6 controllable registers, 7 pressure transducers, 8 blast regulators, 9 effusion meters, 10 air volume regulators in figure.
Detailed description of the invention
As shown in the figure, a kind of negative-pressure firing device of automatic adjustment coefficient of excess air, mainly it is made up of burner hearth 1, PLC 2, burner 3 and ambient temperature sensor 4, pressure transducer 7 is set in burner hearth 1, the chimney 5 of burner hearth 1 arranges controllable register 6, the air inlet of burner 3 arranges blast regulator 8, arranging effusion meter 9 and air volume regulator 10 on the gas inlet pipe of burner hearth 1, ambient temperature sensor 4, controllable register 6, pressure transducer 7, blast regulator 8, effusion meter 9 are connected with PLC 2 respectively with air volume regulator 10.
Operation principle of the present utility model is:
The flue gas that combustion air and burning produce, has certain resistance during by chimney, chimney produces again certain captivation.If resistance ratios captivation is big, the pressure of burner hearth is just high than atmospheric pressure, and it is how many how many height is called back pressure, and unit is Pa；If resistance ratios captivation is little, the pressure of burner hearth just forces down than air, is called for short negative pressure.Extraneous factor affects the captivation of chimney, also just have impact on the pressure of burner hearth, by detecting the change of furnace pressure, and then regulation and control furnace pressure, it is possible to revise the extraneous factor impact on combustion-supporting air quantity, reduce coefficient of excess air, improve negative-pressure firing efficiency.Affect six factors of furnace pressure: exhaust gas temperature and ambient temperature are principal element；Gas flow and combustion air flow are modifying factor；Blow and air humidity is uncontrollable factor.Principal element and modifying factor can know concrete numerical value by detection and setting value, and by calculating furnace pressure, two controlled factors are not difficult to detection and calculate the concrete numerical value of the impact on furnace pressure.The change of chimney gravitation when the two factor causes negative-pressure firing just, the coefficient of excess air affecting negative-pressure firing strengthens.
The calculating of four controllable factors
The impact of exhaust gas temperature and external air temperature, it is possible to calculate with following formula:
The draft (Pa) of Δ P chimney in Δ P=0.0345H formula；
H produces pipeline section height (m) of draft；
Ta external air temperature (DEG C)；
The mean temperature (DEG C) of flue gas in tf run of designing
B atmospheric pressure (Pa).
Burner hearth back pressure and gas quantity, combustion air flow change are relevant, but are not simple proportional relations, but a functional relationship we have been set up the mathematical model of several variable by experiment, have found Changing Pattern.PLC, by detecting the change of burner hearth back pressure, adjusts flue damper automatically, controls combustion air flow, it is ensured that sufficient combustion, it is possible to makes negative pressure stove reach the national standard of forced-draft burner, solves the difficult problem that negative pressure stove efficiency of combustion is low.Specific practice is mainly the Mathematical Models of PLC, and transformation chimney regulating fender is automatically adjust, and increases the detecting device of heating furnace burner hearth back pressure simultaneously, arranges ambient temperature detection device and provide corrected parameter to PLC.
Claims (1)
1. the negative-pressure firing device of an automatic adjustment coefficient of excess air, it is characterized in that mainly being made up of burner hearth, PLC, burner and ambient temperature sensor, pressure transducer is set in burner hearth, the chimney of burner hearth arranges controllable register, the air inlet of burner arranges blast regulator, arranging effusion meter and air volume regulator on the gas inlet pipe of burner hearth, ambient temperature sensor, controllable register, pressure transducer, blast regulator, effusion meter are connected with PLC respectively with air volume regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620119018.8U CN205402784U (en) | 2016-02-14 | 2016-02-14 | Automatic negative -pressure firing ware of surplus coefficient of adjustment air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620119018.8U CN205402784U (en) | 2016-02-14 | 2016-02-14 | Automatic negative -pressure firing ware of surplus coefficient of adjustment air |
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| CN205402784U true CN205402784U (en) | 2016-07-27 |
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| CN201620119018.8U Active CN205402784U (en) | 2016-02-14 | 2016-02-14 | Automatic negative -pressure firing ware of surplus coefficient of adjustment air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270323A (en) * | 2017-05-18 | 2017-10-20 | 昆明理工大学 | A kind of biomass fuel is oxygen-enriched/total oxygen chaos burning real-time diagnosis system and method |
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2016
- 2016-02-14 CN CN201620119018.8U patent/CN205402784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270323A (en) * | 2017-05-18 | 2017-10-20 | 昆明理工大学 | A kind of biomass fuel is oxygen-enriched/total oxygen chaos burning real-time diagnosis system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181109 Address after: 061000 Cangxian Zhifang tou Industrial Park, Cangzhou, Hebei Patentee after: CANGZHOU TIANLONG COMBUSTION EQUIPMENT CO., LTD. Address before: 101400 Nanfang Village West, Beifang Town, Huairou District, Beijing (in the hospital of Beijing Xinri Electroplating Plant) Patentee before: BEIJING DEYIFU TECHNOLOGY DEVELOPMENT CO., LTD. |
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| TR01 | Transfer of patent right |