CN103115379A - Control system for gas leakage and boiler safe operation of steam injection boiler - Google Patents
Control system for gas leakage and boiler safe operation of steam injection boiler Download PDFInfo
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- CN103115379A CN103115379A CN2013100423800A CN201310042380A CN103115379A CN 103115379 A CN103115379 A CN 103115379A CN 2013100423800 A CN2013100423800 A CN 2013100423800A CN 201310042380 A CN201310042380 A CN 201310042380A CN 103115379 A CN103115379 A CN 103115379A
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- 238000010793 Steam injection (oil industry) Methods 0.000 title abstract 4
- 239000007789 gas Substances 0.000 claims abstract description 136
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003345 natural gas Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000000567 combustion gas Substances 0.000 claims description 42
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- 238000012360 testing method Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
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Abstract
The embodiment of the invention discloses a control system for gas leakage and boiler safe operation of a steam injection boiler, which comprises: the system comprises a main gas sensor, an ignition gas sensor, a hearth gas sensor, a field gas PLC control cabinet, a field boiler parameter PLC control cabinet and an upper computer. The main gas sensor is arranged in the main gas circuit, the ignition gas sensor is arranged in the ignition gas circuit, the hearth gas sensor is arranged in a hearth of the steam injection boiler, and the field gas PLC control cabinet converts the main gas circuit analog current, the ignition gas circuit analog current and the hearth analog current into digital current signals and then transmits the digital current signals to the upper computer. The control system for gas leakage and boiler safe operation of the steam injection boiler disclosed by the embodiment of the invention realizes linkage control of gas detection and boiler operation, namely, the boiler is not allowed to start and operate and can not ignite under the condition that natural gas leakage or faults are not eliminated. Meanwhile, the sensor control is adopted, so that the control lag and coupling of the boiler are eliminated, and the control precision is improved.
Description
Technical field
The present invention relates to petroleum thermal recovery and lead the city, relate in particular to the injection boiler gas safe and monitor the field, is the control system of a kind of injection boiler gas leakage and safe operation of the boiler concretely.
Background technology
Gas fired-boiler room natural gas leaking except operate against regulations because of the employee cause cause with nature and external force, mainly contain following reason:
(1) outdoor buried burning line leaks.Its reason has: construction quality does not pass a test or pipeline corrosive perforation;
(2) indoor fuel gas pipeline leakage.Its reason has: during construction, construction quality does not pass a test or moves for a long time pipeline corrosion;
(3) boiler body leaks.Its reason has: at the gas fired-boiler design initial stage or when installing not by relevant technologies requirements construct (for example: weld not tight as boiler pattern wall); After having constructed not by relevant technologies requirement baker (for example the too fast furnace wall brickwork joint of boiler heating and cooling cracking is poorly sealed); Gas fired-boiler when operation vibration is large, weld seam sealing-off or cause insulation of wall layer cracking; Flame-observing hole, explosion proof door, manhole door etc. are not closed completely; Boiler is at when operation auto extinguishing etc.;
(4) burner leaks.Its reason has: design reasons or installation and debugging are not in place; Burner is after long-term operation, and the air-fuel ratio imbalance changes combustion conditions;
Parts and the connecting portion leakages thereof such as (5) control, adjusting, measurement.Its reason has: the frequent action of these parts may cause switch dumb, be not closed completely, or because vibration in boiler running process causes greatly connecting portion to become flexible natural gas leaking, or because the parts such as control, adjusting, measurement are of poor quality, gas leakage is not closed completely; Or cause leakage because flange, gasket seal, fluid sealant etc. are aging.
Yet, also do not have at present specially for the control system that is used for heat-collecting steam boiler gas leakage and safe operation of the boiler.
Summary of the invention
For problems of the prior art, a kind of control system for heat-collecting steam boiler gas leakage and safe operation of the boiler is proposed.
the embodiment of the present invention provides the control system of a kind of injection boiler gas leakage and safe operation of the boiler, comprising: main combustion gas body sensor, the gas sensor that ignites, burner hearth gas sensor, gas on-site PLC switch board, on-the-spot boiler parameter PLC switch board and host computer, described main combustion gas body sensor is arranged in main combustion gas road, is used for the concentration of natural gas according to described main combustion gas road, generates main combustion gas road analog current and sends described gas on-site PLC switch board to, the described gas sensor that ignites is arranged in the gas circuit of igniting, and is used for the concentration of natural gas according to the described gas circuit of igniting, and generates and ignites the gas circuit analog current and send described gas on-site PLC switch board to, described burner hearth gas sensor is arranged in described injection boiler burner hearth, is used for according to the concentration of natural gas in described injection boiler burner hearth, generates the burner hearth analog current and sends described gas on-site PLC switch board to, described gas on-site PLC switch board sends described host computer to after described main combustion gas road analog current, the gas circuit of igniting analog current and burner hearth analog current are converted to the digital current signal, described host computer is according to described digital current signal, generate the Current Control data signal, and return to described gas on-site PLC switch board, after described gas on-site PLC switch board is converted to the Current Control analog signal with described Current Control data signal, control the air valve switch in described main combustion gas road, the gas circuit of igniting and burner hearth, described gas on-site PLC switch board is also with described main combustion gas road analog current, the gas circuit of igniting analog current and burner hearth analog current send to described on-the-spot boiler parameter PLC switch board, described on-the-spot boiler parameter PLC switch board is with described main combustion gas road analog current, the gas circuit of igniting analog current, after being converted to the boiler data signal, the boiler parameter of burner hearth analog current and the injection boiler that obtains sends described host computer to, described host computer generates boiler control figure signal according to described boiler data signal, and return to described on-the-spot boiler parameter PLC switch board, after described on-the-spot boiler parameter PLC switch board is converted to boiler control simulation signal with described boiler control figure signal, control the startup of described injection boiler and close.
Preferably, described control system also comprises printer, connects described host computer, is used for printing current signal and the boiler parameter that is uploaded to described host computer.
Preferably, the analog current of described main combustion gas body sensor, the gas sensor that ignites, the transmission of burner hearth gas sensor is 4-20mA.
Preferably, described control system also comprises the gaseous-pressure sensor, is arranged on the natural gas air inlet of described injection boiler, changes for detection of gaseous-pressure, guarantees the safe operation of described injection boiler.
Preferably, described control system also comprises the gas flow sensor, is arranged on the natural gas air inlet of described injection boiler, for detection of gas flow, calculates the combustion gas unit consumption.
Preferably, described control system also comprises air blast, be arranged in the burner hearth of described injection boiler, when described main combustion gas body sensor, the gas sensor that ignites, when the burner hearth gas sensor has detected natural gas leaking, described gas on-site PLC switch board is controlled described air blast and is opened and purge.
Preferably, described main combustion gas body sensor, the gas sensor that ignites, burner hearth gas sensor are respectively one or more, are arranged on the test point place that chooses.
The injection boiler gas leakage of the embodiment of the present invention and the control system of safe operation of the boiler have realized that gas detects and the chain control of boiler operatiopn, namely in the situation that by natural gas leaking or not eliminating of fault, boiler does not allow start-up operation, can not light a fire.Simultaneously, adopt sensor to control, eliminated boiler control hysteresis and coupling, improved control accuracy.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the control system of the injection boiler gas leakage of the embodiment of the present invention and safe operation of the boiler;
Fig. 2 is the main combustion gas body sensor 101 of the embodiment of the present invention, the gas sensor 102 that ignites, the setting position schematic diagram of burner hearth gas sensor 103 in the boiler gas circuit;
Fig. 3 is the structural representation of another embodiment of the control system of injection boiler gas leakage of the present invention and safe operation of the boiler;
Fig. 4 is the structural representation of another embodiment of the control system of injection boiler gas leakage of the present invention and safe operation of the boiler.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the structural representation of the control system of the injection boiler gas leakage of the embodiment of the present invention and safe operation of the boiler.As shown in the figure, the control system of the present embodiment comprises: main combustion gas body sensor 101, the gas sensor 102 that ignites, burner hearth gas sensor 103, gas on-site PLC switch board 104, on-the-spot boiler parameter PLC switch board 105 and host computer 106.Fig. 2 is the main combustion gas body sensor 101 of the embodiment of the present invention, the gas sensor 102 that ignites, the setting position schematic diagram of burner hearth gas sensor 103 in the boiler gas circuit.
With reference to Fig. 1 and Fig. 2, the main combustion gas body sensor 101 of the present embodiment is arranged in as shown in Figure 2 main combustion gas road, is used for the concentration of natural gas according to described main combustion gas road, generates main combustion gas road analog current and sends described gas on-site PLC switch board 104 to; The described gas sensor 102 that ignites is arranged in as shown in Figure 2 the gas circuit of igniting, and is used for the concentration of natural gas according to the described gas circuit of igniting, and generates and ignites the gas circuit analog current and send described gas on-site PLC switch board 104 to; Described burner hearth gas sensor 103 is arranged in described injection boiler burner hearth, is used for according to the concentration of natural gas in described injection boiler burner hearth, generates the burner hearth analog current and sends described gas on-site PLC switch board 104 to.In the present embodiment, the analog current of described main combustion gas body sensor 101, the gas sensor 102 that ignites, 103 transmission of burner hearth gas sensor is 4-20mA.
Described gas on-site PLC switch board 104 sends described host computer 106 to after described main combustion gas road analog current, the gas circuit of igniting analog current and burner hearth analog current are converted to the digital current signal, described host computer 106 is according to described digital current signal, generate the Current Control data signal, and return to described gas on-site PLC switch board 104, after described gas on-site PLC switch board 104 is converted to the Current Control analog signal with described Current Control data signal, control the air valve switch in described main combustion gas road, the gas circuit of igniting and burner hearth.When natural gas leaking having been detected, close or turn down the air inlet switch in described main combustion gas road, the gas circuit of igniting and burner hearth, to stop in the situation that gas leakage continues to enter combustion gas.
described gas on-site PLC switch board 104 is also with described main combustion gas road analog current, the gas circuit of igniting analog current and burner hearth analog current send to described on-the-spot boiler parameter PLC switch board 105, described on-the-spot boiler parameter PLC switch board 105 is with described main combustion gas road analog current, the gas circuit of igniting analog current, after being converted to the boiler data signal, the boiler parameter of burner hearth analog current and the injection boiler that obtains sends described host computer 106 to, described host computer 106 generates boiler control figure signal according to described boiler data signal, and return to described on-the-spot boiler parameter PLC switch board 105, after described on-the-spot boiler parameter PLC switch board 105 is converted to boiler control simulation signal with described boiler control figure signal, control the startup of described injection boiler and close.Therefore, in embodiments of the present invention, can realize that gas detects and the chain control of boiler operatiopn, namely in the situation that by natural gas leaking or not eliminating of fault, boiler does not allow start-up operation, can not light a fire.Simultaneously, adopt sensor to control, eliminated boiler control hysteresis and coupling, improved control accuracy.
In the present embodiment, described main combustion gas body sensor 101, the gas sensor 102 that ignites, burner hearth gas sensor 103 can be one, also can for a plurality of, be arranged on the test point place in the boiler gas circuit of choosing.Selected test point need to be determined according to actual conditions, preferably can cover whole gas circuit.As shown in Figure 2, also be provided with air blast 110 in the burner hearth of described injection boiler, when described main combustion gas body sensor 101, the gas sensor 102 that ignites, when burner hearth gas sensor 103 has detected natural gas leaking, described gas on-site PLC switch board 104 is controlled described air blasts 110 and is opened and purge.
In another embodiment, as shown in Figure 3, described control system also comprises printer 107, connects described host computer 106, is used for printing current signal and the boiler parameter that is uploaded to described host computer, so that staff's inquiry.In another embodiment, as shown in Figure 4, described control system also comprises gaseous-pressure sensor 108 and gas flow sensor 109, is arranged on respectively the natural gas air inlet of described injection boiler, for detection of gas pressure and flow, to guarantee the safety and steady operation of described injection boiler.The boiler parameter that on-the-spot boiler parameter control PLC switch board 105 obtains comprises gas pressure and the flow parameter at boiler air inlet place.
The injection boiler gas leakage of the embodiment of the present invention and the control system of safe operation of the boiler have realized that gas detects and the chain control of boiler operatiopn, namely in the situation that by natural gas leaking or not eliminating of fault, boiler does not allow start-up operation, can not light a fire.Simultaneously, adopt sensor to control, eliminated boiler control hysteresis and coupling, improved control accuracy.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above is only specific embodiments of the invention; the protection domain that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. the control system of an injection boiler gas leakage and safe operation of the boiler, it is characterized in that, described control system comprises: main combustion gas body sensor, the gas sensor that ignites, burner hearth gas sensor, gas on-site PLC switch board, on-the-spot boiler parameter PLC switch board and host computer;
Described main combustion gas body sensor is arranged in main combustion gas road, is used for the concentration of natural gas according to described main combustion gas road, generates main combustion gas road analog current and sends described gas on-site PLC switch board to;
The described gas sensor that ignites is arranged in the gas circuit of igniting, and is used for the concentration of natural gas according to the described gas circuit of igniting, and generates and ignites the gas circuit analog current and send described gas on-site PLC switch board to;
Described burner hearth gas sensor is arranged in described injection boiler burner hearth, is used for according to the concentration of natural gas in described injection boiler burner hearth, generates the burner hearth analog current and sends described gas on-site PLC switch board to;
Described gas on-site PLC switch board sends described host computer to after described main combustion gas road analog current, the gas circuit of igniting analog current and burner hearth analog current are converted to the digital current signal, described host computer is according to described digital current signal, generate the Current Control data signal, and return to described gas on-site PLC switch board, after described gas on-site PLC switch board is converted to the Current Control analog signal with described Current Control data signal, control the air valve switch in described main combustion gas road, the gas circuit of igniting and burner hearth;
described gas on-site PLC switch board is also with described main combustion gas road analog current, the gas circuit of igniting analog current and burner hearth analog current send to described on-the-spot boiler parameter PLC switch board, described on-the-spot boiler parameter PLC switch board is with described main combustion gas road analog current, the gas circuit of igniting analog current, after being converted to the boiler data signal, the boiler parameter of burner hearth analog current and the injection boiler that obtains sends described host computer to, described host computer generates boiler control figure signal according to described boiler data signal, and return to described on-the-spot boiler parameter PLC switch board, after described on-the-spot boiler parameter PLC switch board is converted to boiler control simulation signal with described boiler control figure signal, control the startup of described injection boiler and close.
2. the control system of injection boiler gas leakage according to claim 1 and safe operation of the boiler, is characterized in that, described control system also comprises printer, connects described host computer, is used for printing current signal and the boiler parameter that is uploaded to described host computer.
3. the control system of injection boiler gas leakage according to claim 1 and safe operation of the boiler, is characterized in that, the analog current that described main combustion gas body sensor, the gas sensor that ignites, burner hearth gas sensor transmit is 4-20mA.
4. the control system of injection boiler gas leakage according to claim 1 and safe operation of the boiler, it is characterized in that, described control system also comprises the gaseous-pressure sensor, be arranged on the natural gas air inlet of described injection boiler, change for detection of gaseous-pressure, guarantee the safe operation of described injection boiler.
5. the control system of injection boiler gas leakage according to claim 1 and safe operation of the boiler, it is characterized in that, described control system also comprises the gas flow sensor, is arranged on the natural gas air inlet of described injection boiler, for detection of gas flow, calculate the combustion gas unit consumption.
6. the control system of injection boiler gas leakage according to claim 1 and safe operation of the boiler, it is characterized in that, described control system also comprises air blast, be arranged in the burner hearth of described injection boiler, when described main combustion gas body sensor, the gas sensor that ignites, when the burner hearth gas sensor has detected natural gas leaking, described gas on-site PLC switch board is controlled described air blast and is opened and purge.
7. the control system of the described injection boiler gas leakage of any one and safe operation of the boiler according to claim 1 to 6, it is characterized in that, described main combustion gas body sensor, the gas sensor that ignites, burner hearth gas sensor are respectively one or more, are arranged on the test point place that chooses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310042380.0A CN103115379B (en) | 2013-02-01 | 2013-02-01 | Control system for gas leakage and boiler safe operation of steam injection boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310042380.0A CN103115379B (en) | 2013-02-01 | 2013-02-01 | Control system for gas leakage and boiler safe operation of steam injection boiler |
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| CN103115379A true CN103115379A (en) | 2013-05-22 |
| CN103115379B CN103115379B (en) | 2015-06-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345274A (en) * | 2013-06-28 | 2013-10-09 | 桑德环境资源股份有限公司 | Method for detecting concentration of hazardous gas |
| CN104456506A (en) * | 2014-10-24 | 2015-03-25 | 中国石油天然气股份有限公司 | Steam injection boiler and explosion-proof method and device thereof |
| CN104879779A (en) * | 2015-05-20 | 2015-09-02 | 广东韶钢松山股份有限公司 | Gas combustion automatic control system and application thereof |
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| CN203177205U (en) * | 2013-02-01 | 2013-09-04 | 中国石油天然气股份有限公司 | Control system for gas leakage and boiler safe operation of steam injection boiler |
-
2013
- 2013-02-01 CN CN201310042380.0A patent/CN103115379B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1252831A (en) * | 1968-06-28 | 1971-11-10 | ||
| JP2006017657A (en) * | 2004-07-05 | 2006-01-19 | Miura Co Ltd | Gas leakage sensitivity device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345274A (en) * | 2013-06-28 | 2013-10-09 | 桑德环境资源股份有限公司 | Method for detecting concentration of hazardous gas |
| CN104456506A (en) * | 2014-10-24 | 2015-03-25 | 中国石油天然气股份有限公司 | Steam injection boiler and explosion-proof method and device thereof |
| CN104879779A (en) * | 2015-05-20 | 2015-09-02 | 广东韶钢松山股份有限公司 | Gas combustion automatic control system and application thereof |
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| CN103115379B (en) | 2015-06-03 |
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