CN201827874U - Control system of fuel oil/gas steam boiler - Google Patents
Control system of fuel oil/gas steam boiler Download PDFInfo
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- CN201827874U CN201827874U CN201020548119XU CN201020548119U CN201827874U CN 201827874 U CN201827874 U CN 201827874U CN 201020548119X U CN201020548119X U CN 201020548119XU CN 201020548119 U CN201020548119 U CN 201020548119U CN 201827874 U CN201827874 U CN 201827874U
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Abstract
The utility model relates to a control system of a fuel oil/gas steam boiler. The fuel oil/gas steam boiler comprises a steam drum, a burner and a burner firebox. The control system comprises a main controller, a man-machine interface module, a water supply controller and the steam drum, the man-machine interface module is connected with a communication interface of the main controller, the burner and the water supply controller are respectively connected with an output interface of the main controller, a feed forward gain regulator is arranged between the burner firebox and a joint between the output interface of the main controller and a fuel gas regulating valve, an oxygen content detector is arranged at a vent inlet of a combustion fan, and a steam pressure sensor and a steam flowmeter are arranged on a steam output pipe of the steam drum. The control system of the fuel oil/gas steam boiler is high-efficiency and energy-saving, adopts full-automatic control, and is capable of realizing automatic control of stream pressure of the boiler and water level of the steam drum and reducing frequent start and stop of the burner of the boiler due to unstable load of the boiler.
Description
Technical field
The utility model relates to a kind of control system of boiler, relates in particular to a kind of control system of fuel vapor steam boiler.
Background technology
The fuel vapor boiler plant has been widely used in the production and life of all trades and professions, raising along with modernization construction and people's living standard, people are also more and more higher to the requirement of the automaticity of boiler plant, the control system of fuel vapor steam boiler of the prior art needs the cooperation of highly intensive labour power, need continual enforcement supervision and control, make steam pressure satisfy the boiler load requirement in real time certain difficulty is also arranged, the boiler load instability causes the frequent startup of boiler-burner easily and stops, even the increase manual intervention does not have expected effect yet.The steam pressure of boiler is not realized automation control yet, needs additional other steam pressure controller, and this has also increased the volume of boiler control system.
The utility model content
Technical problem to be solved in the utility model has provided a kind of control system of fuel vapor steam boiler of energy-efficient, full-automatic control, this control system can realize the automation control of boiler pressure, steam water-level, boiler load stability control can reduce because of the boiler load instability and causes the frequent startup of boiler-burner and stop.
For addressing the above problem, the technical solution of the utility model is:
A kind of control system of fuel vapor steam boiler, described fuel vapor steam boiler comprises drum, burner and burner burner hearth, described control system comprises master controller, human-computer interface module, feedwater controller and drum, described master controller comprises master cpu and expansion module, integrated communicaton interface and input/output interface in the master cpu, human-computer interface module links to each other with the communication interface of master controller, burner, feedwater controller links to each other with the output interface of master controller respectively, the output interface of master controller links to each other with the burner burner hearth by gas control valve, be provided with the feedforward gain adjuster between the output interface of master controller and the junction of gas control valve and the burner burner hearth, this feedforward gain adjuster links to each other with the burner burner hearth by the burning blower fan, the ventilation intake place of burning blower fan is provided with the oxygen content checkout gear, this oxygen content checkout gear links to each other with the feedforward gain adjuster, feedwater controller links to each other with drum, the steam output pipe of drum is provided with steam pressure sensor and steam-flow meter, this steam pressure sensor links to each other with the input interface of master controller, and this steam-flow meter links to each other with the junction of gas control valve with the output interface of master controller.
Preferably, described feedwater controller is the frequency converter feedwater controller.
Preferably, be provided with the single pulse regulating circuit between described drum and the master controller.
Preferably, be provided with three momentum regulating circuits between described drum and the master controller.
Preferably, it also comprises interlocking protective device described control system, and this interlocking protective device links to each other with the output interface of master controller.
Preferably, described master controller also comprises wireless communication module, and this wireless communication module links to each other with the communication interface of control module.
Preferably, described human-computer interface module is provided with the color touch screen.
The utility model provides a kind of control system of fuel vapor steam boiler of energy-efficient, full-automatic control, this control system can realize the automation control of boiler pressure, steam water-level, realize the optimal combustion state of burner by control, stablize the load of boiler, can reduce and cause the frequent startup of boiler-burner because of boiler load is unstable and stop.
Description of drawings
Fig. 1 is the control system work schematic diagram of fuel vapor steam boiler.
Fig. 2 is a control system module connection diagram.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As Fig. 1; shown in Figure 2; fuel vapor steam boiler of the present utility model comprises drum 1; burner 2 and burner burner hearth 3; control system comprises master controller 4; human-computer interface module; interlocking protective device and feedwater controller 11; described master controller 4 comprises master cpu; wireless communication module and expansion module; integrated communicaton interface and input/output interface in the master cpu; wireless communication module; human-computer interface module links to each other with the communication interface of master controller 4 respectively; this human-computer interface module is provided with the color touch screen; interlocking protective device links to each other with the output interface of master controller 4; burner 2; feedwater controller 11 links to each other with the output interface of master controller 4 respectively; this feedwater controller 11 is given water management for frequency converter; the output interface of master controller 4 links to each other with burner burner hearth 3 by gas control valve 5; be provided with feedforward gain adjuster 6 between the junction of the output interface of master controller 4 and gas control valve 5 and the burner burner hearth 3; this feedforward gain adjuster 6 links to each other with burner burner hearth 3 by burning blower fan 7; the ventilation intake place of burning blower fan 7 is provided with oxygen content checkout gear 8; this oxygen content checkout gear 8 links to each other with feedforward gain adjuster 6; feedwater controller 11 links to each other with drum 1; the steam output pipe of drum 1 is provided with steam pressure sensor 9 and steam-flow meter 10; this steam pressure sensor 9 links to each other with the input interface of master controller 4; this steam-flow meter 10 links to each other with the junction of gas control valve 5 with the output interface of master controller 4, is provided with single pulse between described drum 1 and the master controller 4; three momentum regulating circuits.
The control system of fuel vapor steam boiler is controlled the process of whole burner igniting-blowing out, and this control program is divided into preparation routine, ignition procedure, working procedure, interlock protection program and five parts of downtime schedule.At first be preparation routine: before burner 2 operations, at first must carry out burner hearth 3 and purge.Opening blast apparatus when burner hearth 3 purges purges.Next is an ignition procedure: after system purged and finishes, burner 2 entered ignition procedure, and the igniting subprogram is preceding purging, sparking, the auxilliary fire of point, the main fire of point and flame control.After system point pyrogene merit, enter working procedure, promptly burner 2 enters the flame adjusting.The control target of system is to guarantee that steam pressure satisfies the requirement of load; The control of system is to liking the intake and the air inflow of burner 2.System acquisition steam pressure signal is set desired value simultaneously, by the pid algorithm of master controller, makes system's real-time continuous regulate the intake and the air inflow of burner.Be interlock program once more: when boiler failures such as boiler leaving water temperature superelevation, excessive low water level protection and burning blower fan overload, interlock program starts, and enters downtime schedule automatically.Be downtime schedule at last: when urgent blowing out of system or fault blowing out, close the cut-out fuel gas supply, carry out post-purge, carry out burner 2 at last and reset.
In the working procedure and interlock protection program of burner igniting-blowing out, constantly carry out the control and the detection of signal, wherein the steam pressure control section of the boiler in the working procedure is the key of The whole control system.The control of steam pressure is achieved in that as shown in Figure 1, the steam pressure control loop compares steam pressure detected value and setting value, its deviation is as the input signal of master controller, after master controller carries out the PID computing, the aperture that the output control signal removes to regulate gas control valve 5, oxygen content checkout gear 8 and the acting in conjunction of output control signal are on feedforward gain adjuster 6, regulate the aperture of burning blower fan 7 air doors by feedforward gain adjuster 6, realize burner 2 optimal combustion states with this, reach the setting requirement of steam pressure.In order to realize the stable control of steam pressure, can introduce steam flow as feed-forward signal, more in time handle the aperture of gas control valve and burning blower fan.
In addition, the burning control algolithm can have artificial guiding function, the user can refer to set from lighting a fire the fully loaded time, therefore, under different state of temperatures, in case the user has imported starting, fully loaded time requirement, the control that burning control software will be loaded according to the steam pressure of reality under the bigger situation of gap, is adopted the full-open type burning, near full load condition, intelligent software is regulated the burning air door according to dynamic pid parameter, guarantees the steady arrival of full load condition, reduces overshoot, to arrive best control effect, satisfy fully under the different pressures state from starting to fully loaded time requirement.In the working control process, control software adopts calibration pulse output, and the motor of control burner just changes or reverses, to reach burden requirement.
The Water Level Control of Steam be in the boiler control system except that the of paramount importance regulating loop of burning control, also be one of must the automatic regulating loop of input in the The whole control system.Thereby the purpose of Feed Water Regulation System is to realize keeping the stability of water level in the boiler-steam dome by the last discharge of control boiler, make its slight fluctuation about a certain setting value, alleviated the hard work that is produced of manually controlling water level by operating personnel effectively.
The steam boiler feed water control system is regulated by single pulse and three momentums and is formed, and single pulse is regulated by the feed water output of frequency converter of steam water-level actual value and Deviation Control between the setting value, and this control is general comes into operation under less than 30% situation at boiler load; It is to form by steam water-level actual value, Boiler Steam flow and boiler feedwater flow that three momentums are regulated, and by being controlled variable with the steam water-level, feedwater flow is a control variables, and steam flow is that the tandem of feed-forward signal adds feedforward control system.The control of three momentum water levels can not only effectively overcome " artifical water height " influence, and can press down and suppress the feedwater disturbance.This control is generally come into operation under greater than 30% situation automatically at boiler load.Realize voluntarily after the control switching that single pulse is regulated and three momentums are regulated is judged boiler operation situation by system, do not need human intervention.When the transmitter operate as normal of main steam flow and main feedwater flow, main feedwater is regulated and is three momentum automatic control modes.Single pulse was regulated and was in tracking mode this moment, promptly followed the tracks of the output that three momentums are regulated.If feedwater was regulated and is automatically switched to the single pulse regulative mode when signal fault appearred in the transmitter of main steam flow or main feedwater flow.The control of boiler-steam dome liquid level has manual adjustments and regulates two kinds of patterns automatically, can realize not having disturbance between manual adjustments and automatic the adjusting and switch.Adopt VFC feed pump mode to replace traditional control valve for water management, to reach energy saving purposes more.The feed pump working method is the using and the reserved, and the user can adopt manually or mode is regularly carried out the switching use of feed pump.
In the interlock protection program, the ontological security defencive function of fuel vapor steam boiler is as follows:
(1) fuel pressure abnormal protection: fuel pressure is high and low all will to produce alarm signal, and stop ignition process;
(2) blast abnormal protection: blast pressure is high and low all will to produce alarm signal, and stop ignition process;
(3) leak protection: find that fuel leaks, then produce alarm signal, stop ignition process, start the safety cut-off bleed-off system simultaneously;
(4) blowout protection: when the flame detection is found to stop working, produce alarm signal, stop ignition process;
When (5) the boiler leaving water temperature is high, produce alarm signal, reach high point if temperature continues to raise, then urgent burn-out, and enter the purging state, reset behind the purging;
(6) when boiler water level is low, produce alarm signal, if continuing to reduce, water level reaches utmost point low spot, then urgent burn-out, and enter the purging state, reset behind the purging;
(7) when the boiler discharge pressure is high, produce alarm signal, if continuing lifting, pressure reaches high point, then urgent burn-out, and enter the purging state, reset behind the purging;
(8) send when boiler failure or emergency mobile forces stop signal, then urgent burn-out produces alarm signal, and enters the purging state, resets behind the purging;
(9) smoke evacuation overtemperature: when exhaust gas temperature surpasses setting value, sound and light alarm;
(10) burning blower fan protection: when blower motor phase shortage and overload, electrothermal relay can move, and cuts off fan power, blowing out and sound and light alarm;
(11) circulating pump protection: when circulation-water pump electric machine phase shortage and overload, electrothermal relay can move, and cuts off fan power, sound and light alarm;
(12) power-off protection: when external power source has a power failure suddenly, boiler is out of service, must restart during incoming call, and boiler could move.
Under the ontological security protection of fuel vapor steam boiler, the control system security system of fuel vapor steam boiler improves constantly, and the thermal efficiency has also obtained guarantee.
At last, should be pointed out that above embodiment only is the more representational example of the utility model.Obviously, the utility model is not limited to the foregoing description, and many distortion can also be arranged.Every foundation technical spirit of the present utility model all should be thought to belong to protection domain of the present utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1. the control system of a fuel vapor steam boiler, described fuel vapor steam boiler comprises drum, burner and burner burner hearth, it is characterized in that, described control system comprises master controller, human-computer interface module, feedwater controller and drum, described master controller comprises master cpu and expansion module, integrated communicaton interface and input/output interface in the master cpu, human-computer interface module links to each other with the communication interface of master controller, burner, feedwater controller links to each other with the output interface of master controller respectively, the output interface of master controller links to each other with the burner burner hearth by gas control valve, be provided with the feedforward gain adjuster between the output interface of master controller and the junction of gas control valve and the burner burner hearth, this feedforward gain adjuster links to each other with the burner burner hearth by the burning blower fan, the ventilation intake place of burning blower fan is provided with the oxygen content checkout gear, this oxygen content checkout gear links to each other with the feedforward gain adjuster, feedwater controller links to each other with drum, the steam output pipe of drum is provided with steam pressure sensor and steam-flow meter, this steam pressure sensor links to each other with the input interface of master controller, and this steam-flow meter links to each other with the junction of gas control valve with the output interface of master controller.
2. the control system of fuel vapor steam boiler according to claim 1 is characterized in that, described feedwater controller is the frequency converter feedwater controller.
3. the control system of fuel vapor steam boiler according to claim 1 is characterized in that, is provided with the single pulse regulating circuit between described drum and the master controller.
4. the control system of fuel vapor steam boiler according to claim 1 is characterized in that, is provided with three momentum regulating circuits between described drum and the master controller.
5. the control system of fuel vapor steam boiler according to claim 1 is characterized in that, it also comprises interlocking protective device, and this interlocking protective device links to each other with the output interface of master controller.
6. the control system of fuel vapor steam boiler according to claim 1 is characterized in that, described master controller also comprises wireless communication module, and this wireless communication module links to each other with the communication interface of control module.
7. the control system of fuel vapor steam boiler according to claim 1 is characterized in that, described human-computer interface module is provided with the color touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020548119XU CN201827874U (en) | 2010-09-29 | 2010-09-29 | Control system of fuel oil/gas steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020548119XU CN201827874U (en) | 2010-09-29 | 2010-09-29 | Control system of fuel oil/gas steam boiler |
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| Publication Number | Publication Date |
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| CN201827874U true CN201827874U (en) | 2011-05-11 |
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| CN201020548119XU Expired - Lifetime CN201827874U (en) | 2010-09-29 | 2010-09-29 | Control system of fuel oil/gas steam boiler |
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| CN (1) | CN201827874U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964268A (en) * | 2015-07-23 | 2015-10-07 | 济南裕兴化工有限责任公司 | Automatic water feeding method, using electric contact water level indicator signal, of boiler DSC system |
| CN105911950A (en) * | 2016-04-22 | 2016-08-31 | 北京石油化工学院 | Steam boiler remote control system |
| CN107219758A (en) * | 2017-07-03 | 2017-09-29 | 安徽马钢自动化信息技术有限公司 | A kind of liquid level of steam drum adjusting method |
| CN107885137A (en) * | 2018-01-10 | 2018-04-06 | 苏州汉策能源设备有限公司 | A kind of boiler combustion controller of structure novel |
| CN110360539A (en) * | 2019-07-22 | 2019-10-22 | 赣州市怡辰新能源开发有限公司 | A kind of Industrial Boiler voltage-stabilizing system |
| CN112097241A (en) * | 2020-08-20 | 2020-12-18 | 中国能源建设集团华东电力试验研究院有限公司 | Steam turbine FCB test drum water level control feedforward structure and control method thereof |
| CN113915601A (en) * | 2021-09-09 | 2022-01-11 | 中国五环工程有限公司 | Automatic control system and control method for air-fuel ratio of oil-gas boiler |
| CN114110548A (en) * | 2021-10-29 | 2022-03-01 | 国能四川天明发电有限公司 | Steam supply equipment and control method thereof |
-
2010
- 2010-09-29 CN CN201020548119XU patent/CN201827874U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964268A (en) * | 2015-07-23 | 2015-10-07 | 济南裕兴化工有限责任公司 | Automatic water feeding method, using electric contact water level indicator signal, of boiler DSC system |
| CN104964268B (en) * | 2015-07-23 | 2017-03-15 | 济南裕兴化工有限责任公司 | The method that Boiler DCS System realizes automatic loading water using electric contact point fluviograph signal |
| CN105911950A (en) * | 2016-04-22 | 2016-08-31 | 北京石油化工学院 | Steam boiler remote control system |
| CN107219758A (en) * | 2017-07-03 | 2017-09-29 | 安徽马钢自动化信息技术有限公司 | A kind of liquid level of steam drum adjusting method |
| CN107885137A (en) * | 2018-01-10 | 2018-04-06 | 苏州汉策能源设备有限公司 | A kind of boiler combustion controller of structure novel |
| CN110360539A (en) * | 2019-07-22 | 2019-10-22 | 赣州市怡辰新能源开发有限公司 | A kind of Industrial Boiler voltage-stabilizing system |
| CN112097241A (en) * | 2020-08-20 | 2020-12-18 | 中国能源建设集团华东电力试验研究院有限公司 | Steam turbine FCB test drum water level control feedforward structure and control method thereof |
| CN113915601A (en) * | 2021-09-09 | 2022-01-11 | 中国五环工程有限公司 | Automatic control system and control method for air-fuel ratio of oil-gas boiler |
| CN114110548A (en) * | 2021-10-29 | 2022-03-01 | 国能四川天明发电有限公司 | Steam supply equipment and control method thereof |
| CN114110548B (en) * | 2021-10-29 | 2023-11-24 | 国能四川天明发电有限公司 | Steam supply equipment and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU DELIAN TECHNOLOGY CO., LTD. Free format text: FORMER NAME: DELIN TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 1-102 S5 building 475, Changhe Road, Changhe Road, Binjiang District, Zhejiang, Hangzhou 310052, China Patentee after: HANGZHOU DELIAN SCIENCE AND TECHNOLOGY CO., LTD. Address before: Hangzhou City, Zhejiang province 310011 Gongshu District Xiangyuan Road No. 28 Le Fuzhi Park 2-102 Patentee before: Hangzhou DELIN Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20110511 |
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| CX01 | Expiry of patent term |