CN203823802U - Automatic supply air rate control device for basement boiler room - Google Patents
Automatic supply air rate control device for basement boiler room Download PDFInfo
- Publication number
- CN203823802U CN203823802U CN201420262313.XU CN201420262313U CN203823802U CN 203823802 U CN203823802 U CN 203823802U CN 201420262313 U CN201420262313 U CN 201420262313U CN 203823802 U CN203823802 U CN 203823802U
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- CN
- China
- Prior art keywords
- boiler
- plc automatic
- intake
- oxygen content
- control system
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 33
- 239000001301 oxygen Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003546 flue gas Substances 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 19
- 239000003345 natural gas Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010025 steaming Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Regulation And Control Of Combustion (AREA)
Abstract
The utility model discloses an automatic supply air rate control device for a basement boiler room, which comprises an air inlet system and a PLC automatic control system, wherein the air inlet system comprises a blower and a frequency conversion control cabinet; an oxygen content analysis meter is mounted on a smoke discharge pipe of a boiler; a vortex shedding flowmeter is mounted at a blast pipe; the PLC automatic control system is respectively connected with the frequency conversion control cabinet, the oxygen content analysis meter and the vortex shedding flowmeter. According to the utility model, the oxygen content analysis meter on the smoke discharge pipe is adopted to monitor the flue gas emission of the boiler, so that heat loss of the boiler room equipment is reduced, power consumption of the blower is reduced, the running cost of the boiler room is effectively reduced, and meanwhile, the working strength and difficulty of furnacemen are greatly reduced.
Description
Technical field
The utility model relates to a kind of automatic regulating system, relates in particular to a kind of automatic regulating system that is applied to basement boiler room, is specially basement boiler room intake automaton.
Background technology
The most important condition of complete combustion of fuel is oxygen, and the required oxygen of boiler combustion source is fresh air, also configures blowing device in existing gas fired-boiler room, for boiler combustion provides the intake of a fixed value.
In the design of boiler room, tending to that general power is divided into some boilers bears, to better adjust the gross output of boiler in the time of load variations, only the in the situation that of extreme cold, just can drop into all boiler powers, in whole Heating Season, such operating mode only has two to three time-of-weeks, the operate power of most time boiler only has between the 40%-80% of design and installation power, in existing boiler room supply air system, manually to control pressure fan start and stop, air output is also a fixed value, required intake while meeting the maximum operate power of boiler, so, air output can not change with the variation of boiler power, if start pressure fan in whole Heating Season always, can cause long-time excessive air-supply, cause environment temperature to decline, increase the heat loss of equipment in boiler room, under the operating mode of excessive air-supply, pressure fan also can expend more electric weight.
In the related specifications of existing boiler room supply air system, there is no dividing of boiler room, ground and basement boiler room, it is relatively easy that boiler room, ground obtains new wind, open the window and need not drive pressure fan and also can meet the demand of boiler operatiopn, and that basement boiler room obtains new wind is much more difficult with regard to essential factor, must drive pressure fan, but in related specifications, there is no the indoor intake in clear and definite boiler room, the quantizating index requirement of oxygen content, just very random, also very unprofessional having carried: per hourly will send how many times wind or change repeatedly gas, so. this has proposed very high requirement just to stoker personnel,
Do not have the index quantizing to cause stoker personnel cannot support control gas fired-boiler at required intake of when burning, if intake too stool can cause environment temperature to decline, increase the heat loss of equipment in boiler room, and operating personnel also can directly turn off because environment temperature is low pressure fan, so just cause boiler to burn in the environment of oxygen amount wretched insufficiency possibly, cause boiler combustion efficiency low, boiler smoke discharge exceeds standard, the serious carbon distribution of flue gas flow channel of boiler, the carbon distribution vicious circle state that more multiple-effect rate is lower, also maintenance work amount and the expense of boiler have been strengthened simultaneously, at present such a event is at the boiler room of basement ubiquity.
utility model content
The purpose of this utility model provides a kind of basement boiler room intake automaton, make basement boiler room decide air intake supply by the number of the actual power that puts into operation of boiler, ensure to avoid excessive air-supply when operating boiler can obtain enough intakes and oxygen amount, to solve the problem proposing in above-mentioned background technology.
To achieve these goals, the utility model is realized by the following technical solutions:
Basement boiler room intake automaton, comprises air inlet system and PLC automatic control system, described air inlet system comprises and is arranged on the pressure fan at inlet air of boiler pipe place and the frequency-conversion control cabinet for pressure fan is regulated and controled, oxygen conten analyser for measuring flue gas oxygen content is installed on the smoke exhaust pipe of described boiler, and blast pipe place is provided with the vortex-shedding meter for detection of the real-time air output of pressure fan, described PLC automatic control system respectively with frequency-conversion control cabinet, oxygen conten analyser is all connected with vortex-shedding meter, PLC automatic control system is for detection of boiler real time execution power, and automatically calculate required intake desired value according to the natural gas consumption of boiler operatiopn power, and the measured value of intake desired value and vortex-shedding meter is compared, PLC automatic control system generates the control model of frequency-conversion control cabinet automatically, output frequency-conversion control cabinet regulates analog quantity in real time, continual vortex-shedding meter and intake desired value are compared-regulated, make real-time intake equal all the time intake desired value, realize the object that intake is controlled automatically, PLC automatic control system is by being arranged on the oxygen content in the oxygen conten analyser real-time tracking flue gas on smoke exhaust pipe, and revise in real time blower fan air output, make the oxygen content in flue gas equal the oxygen content normal value in normal boiler smoke in service, realize the automatic control to the oxygen content in flue gas.
As further scheme of the present utility model, described PLC automatic control system is PLC automatic controller.
As further scheme of the present utility model, described frequency-conversion control cabinet connects respectively AI, AO, DO, the DI port of PLC automatic controller; Described vortex-shedding meter, oxygen conten analyser, and the start and stop button of boiler blower connects respectively AI and the DI port of PLC automatic controller; The COM port of described PLC automatic controller connects touch screen.
In sum, the utility model has following beneficial effect compared with conventional art:
1, the utility model is installed an oxygen conten analyser on smoke exhaust pipe, monitors the fume emission of boiler, effectively ensures the combustion conditions of boiler, reduces pollutant emission, has avoided boiler smoke runner carbon distribution, reduces the maintaining cost of boiler;
2, the utility model can quantitatively be blown according to boiler operatiopn power, reduces the thermal loss of boiler room equipment, reduces the power consumption of blower fan, effectively reduces boiler room operating cost;
3, automatically regulate owing to having realized air output, significantly alleviated working strength and the difficulty of watching furnaceman.
Brief description of the drawings
Fig. 1 is the utility model system diagram;
Fig. 2 is the utility model fundamental diagram.
Detailed description of the invention
Below in conjunction with the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1-2, basement boiler room intake automaton, comprises air inlet system and PLC automatic control system 4; Described air inlet system comprises and is arranged on the pressure fan 5 at inlet air of boiler pipe 7 places and the frequency-conversion control cabinet 3 for pressure fan 5 is regulated and controled; Oxygen conten analyser 6 for measuring flue gas oxygen content is installed on the smoke exhaust pipe 8 of described boiler 1, and blast pipe 7 places are provided with the vortex-shedding meter 5 for detection of the real-time air output of pressure fan; Described PLC automatic control system 4 is selected PLC automatic controller, described frequency-conversion control cabinet 3 accesses respectively AI, AO, DO, the DI port of PLC automatic controller, vortex-shedding meter 5, oxygen conten analyser 6, and the start and stop button of boiler blower 9 connects respectively AI and the DI port of PLC automatic controller, the COM port of PLC automatic controller connects touch screen; PLC automatic controller has been used for the data acquisition of air quantity, oxygen content and boiler real time execution power, logical operation, the output of pressure fan revolution control simulation amount, the stack gas emissions Realtime Alerts that exceeds standard, the inquiry of operational factor and alarm parameters and storage, and operational factor and alarm parameters function is set etc.; In the time of boiler startup, enabling signal feeds back to PLC automatic controller immediately; PLC automatic controller steams ton/hour (720KW) boiler rated air consumption hourly according to 1 and is about 78m3 natural gas; required intake is: 78*12=936m3 intake is computation model, exports result of calculation to frequency-conversion control cabinet control pressure fan real-time air output; While steaming ton/hour (4200KW) boiler operatiopn for one 6, air output is: 936*6=5616m3; While steaming ton/hour (4200KW*2) boiler operatiopn for two 6, air output is: 5616*2=11232m3; While steaming ton/hour (4200KW*3) boiler operatiopn for three 6, air output is: 5616*3=16848m3; When boiler wherein one stop, PLC automatic controller reduces the specified air output of a boiler automatically, thereby realizes automatic control to basement boiler room intake.
The utility model is in a heating of coming into operation, and every discharge index is completely up to standard, opens furnace inspection also without any carbon distribution.
Wherein, the computation model of the intake in PLC automatic controller is according to CH4+2O2==CO2+2H2O reaction formula, and methane is the Main Ingredients and Appearance of natural gas, one standard cubic meter natural gas completing combustion needs the oxygen of 2 standard cubic meters, content of oxygen in air is by 21% words of calculating, being converted to air approximately needs 9--10 cubic meter, and when burning, needed excess air coefficient is the air that 1.15, one standard cubic meter pipe natural gas completing combustions need 12 standard cubic meters; Calculate power, air consumption and the required intake of boiler according to such result of calculation: 1 steaming ton/hour; 1T/h=0.7MW/h=720KW/h=60 ten thousand Kcal/h; Heating value of natural gas calculates by 8000 kilocalories, and 1 steaming ton/hour (720KW) boiler rated air consumption hourly is about 78m3 natural gas; Required intake is: 78*12=936m3 intake.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present utility model or essential characteristic, can realize the utility model with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the utility model.
In addition, be to be understood that, although this description is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should make description as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. basement boiler room intake automaton, comprises air inlet system and PLC automatic control system, it is characterized in that, described air inlet system comprises and is arranged on the pressure fan at inlet air of boiler pipe place and the frequency-conversion control cabinet for pressure fan is regulated and controled, oxygen conten analyser for measuring flue gas oxygen content is installed on the smoke exhaust pipe of described boiler, and blast pipe place is provided with the vortex-shedding meter for detection of the real-time air output of pressure fan, described PLC automatic control system respectively with frequency-conversion control cabinet, oxygen conten analyser is all connected with vortex-shedding meter, PLC automatic control system is for detection of boiler real time execution power, and automatically calculate required intake desired value according to the natural gas consumption of boiler operatiopn power, and the measured value of intake desired value and vortex-shedding meter is compared, PLC automatic control system generates the control model of frequency-conversion control cabinet automatically, output frequency-conversion control cabinet regulates analog quantity in real time, continual vortex-shedding meter and intake desired value are compared-regulated, make real-time intake equal all the time intake desired value, realize the object that intake is controlled automatically, PLC automatic control system is by being arranged on the oxygen content in the oxygen conten analyser real-time tracking flue gas on smoke exhaust pipe, and revise in real time blower fan air output, make the oxygen content in flue gas equal the oxygen content normal value in normal boiler smoke in service, realize the automatic control to the oxygen content in flue gas.
2. basement according to claim 1 boiler room intake automaton, is characterized in that, described PLC automatic control system is PLC automatic controller.
3. basement according to claim 1 and 2 boiler room intake automaton, is characterized in that, described frequency-conversion control cabinet connects respectively AI, AO, DO, the DI port of PLC automatic controller; Described vortex-shedding meter, oxygen conten analyser, and the start and stop button of boiler blower connects respectively AI and the DI port of PLC automatic controller; The COM port of described PLC automatic controller connects touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420262313.XU CN203823802U (en) | 2014-05-22 | 2014-05-22 | Automatic supply air rate control device for basement boiler room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420262313.XU CN203823802U (en) | 2014-05-22 | 2014-05-22 | Automatic supply air rate control device for basement boiler room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203823802U true CN203823802U (en) | 2014-09-10 |
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ID=51479295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420262313.XU Expired - Lifetime CN203823802U (en) | 2014-05-22 | 2014-05-22 | Automatic supply air rate control device for basement boiler room |
Country Status (1)
| Country | Link |
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| CN (1) | CN203823802U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968414A (en) * | 2014-05-22 | 2014-08-06 | 北京蓝天瑞德环保技术股份有限公司 | Automatic control device of basement boiler room air inlet amount |
-
2014
- 2014-05-22 CN CN201420262313.XU patent/CN203823802U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968414A (en) * | 2014-05-22 | 2014-08-06 | 北京蓝天瑞德环保技术股份有限公司 | Automatic control device of basement boiler room air inlet amount |
| CN103968414B (en) * | 2014-05-22 | 2018-11-16 | 北京蓝天瑞德环保技术股份有限公司 | Basement boiler room intake automatic control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |