CN114110548B - Steam supply equipment and control method thereof - Google Patents
Steam supply equipment and control method thereof Download PDFInfo
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- CN114110548B CN114110548B CN202111277240.2A CN202111277240A CN114110548B CN 114110548 B CN114110548 B CN 114110548B CN 202111277240 A CN202111277240 A CN 202111277240A CN 114110548 B CN114110548 B CN 114110548B
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- boiler
- fuel
- steam
- regulating valve
- burner
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000295 fuel oil Substances 0.000 claims abstract description 103
- 230000001105 regulatory effect Effects 0.000 claims abstract description 63
- 239000003921 oil Substances 0.000 claims abstract description 55
- 239000000446 fuel Substances 0.000 claims description 157
- 230000001276 controlling effect Effects 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 9
- 238000010248 power generation Methods 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- 238000012546 transfer Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/008—Control systems for two or more steam generators
Abstract
The embodiment of the application provides steam supply equipment and a control method thereof, and relates to the technical field of thermal power generation, so as to solve the problem of unstable working state of the steam supply equipment. The steam supply apparatus includes: an oil inlet main pipe, a first flow regulating valve, a first oil-fired start boiler, a second flow regulating valve, an oil return main pipe, a first regulating valve, a first pair of empty steam exhaust valves, a second regulating valve, a second pair of empty steam exhaust valves and a steam main pipe; the oil inlet main pipe is connected with a first burner of a first fuel oil starting boiler and a second burner of a second fuel oil starting boiler respectively through a first flow regulating valve, the first burner and the second burner are connected with an oil return main pipe through a second flow regulating valve, a first steam outlet is connected with a first regulating valve and a first pair of air exhaust valves respectively, a second steam outlet is connected with a second regulating valve and a second pair of air exhaust valves respectively, and the first regulating valve and the second regulating valve are connected with the steam main pipe respectively.
Description
Technical Field
The application relates to the technical field of thermal power generation, in particular to steam supply equipment and a control method thereof.
Background
In steam supply equipment, fuel oil is often used to start the boiler. In the related art, the fuel oil starting boiler has the problem that the control precision of the fuel oil supply pressure is not high. When the fuel supply pressure is changed, the operating state of the fuel start-up boiler is changed, so that the operating state of the steam supply device is changed. Thus, when the fuel oil starting boiler has the problem of low accuracy of control of the fuel oil pressure, the steam supply equipment has the problem of unstable working state.
Disclosure of Invention
The embodiment of the application provides steam supply equipment and a control method thereof, which are used for solving the problem that the steam supply equipment has unstable working state.
In a first aspect, an embodiment of the present application provides a steam supply device.
The steam supply device provided by the embodiment of the application comprises: an oil inlet main pipe, a first flow regulating valve, a first oil-fired start boiler, a second flow regulating valve, an oil return main pipe, a first regulating valve, a first pair of empty steam exhaust valves, a second regulating valve, a second pair of empty steam exhaust valves and a steam main pipe;
the first fuel oil starting boiler comprises a first burner, the second fuel oil starting boiler comprises a second burner, the oil inlet main pipe is connected with the first flow regulating valve, the first flow regulating valve is respectively connected with the first burner and the second burner, the first burner and the second burner are both connected with the second flow regulating valve, the second flow regulating valve is connected with the oil return main pipe,
the first fuel starting boiler is provided with a first steam outlet, the second fuel starting boiler is provided with a second steam outlet, the first steam outlet is respectively connected with the first regulating valve and the first pair of empty steam exhaust valves, the second steam outlet is respectively connected with the second regulating valve and the second pair of empty steam exhaust valves, and the first regulating valve and the second regulating valve are both connected with the steam main pipe.
Optionally, the steam supply device further comprises a pressure reducing valve, and the oil inlet main pipe is connected with the first flow regulating valve through the pressure reducing valve.
Optionally, the steam supply device further comprises a steam relay, and the steam main pipe is connected with the steam relay.
In a second aspect, an embodiment of the present application provides a control method of a steam supply apparatus.
The control method provided by the embodiment of the application is used for controlling any one of the steam supply devices provided by the first aspect. The control method provided by the embodiment of the application comprises the following steps: supplying fuel oil to the first fuel oil starting boiler and the second fuel oil starting boiler through the fuel oil inlet main pipe respectively; controlling the first burner to ignite; acquiring first color data of smoke generated by starting a boiler grate by the first fuel; adjusting the working state of the first fuel oil starting boiler based on the first color data; after the first burner finishes ignition, controlling the second burner to perform ignition; acquiring second color data of smoke generated by the second fuel oil starting boiler; and adjusting the working state of the second fuel oil starting boiler based on the second color data.
Optionally, the adjusting the working state of the first fuel oil start boiler based on the first color data includes: and adjusting the first fuel supply amount of the first fuel start boiler and the first air intake amount of the first fuel start boiler based on the first color data so as to adjust the working state of the first fuel start boiler.
Optionally, the adjusting the working state of the second fuel oil start-up boiler based on the second color data includes: and adjusting a second fuel supply amount of the second fuel start boiler and a second air intake amount of the second fuel start boiler based on the second color data so as to adjust the working state of the second fuel start boiler.
Optionally, the control method further includes: acquiring steam pressure data of the tail end of the steam main pipe; and adjusting the working state of the first fuel oil starting boiler and the working state of the second fuel oil starting boiler based on the steam pressure data.
Optionally, the adjusting the operating state of the first fuel start-up boiler and the operating state of the second fuel start-up boiler based on the steam pressure data includes: based on the steam pressure data, adjusting a first fuel supply amount of the first fuel start-up boiler and a first air intake amount of the first fuel start-up boiler, and adjusting a second fuel supply amount of the second fuel start-up boiler and a second air intake amount of the second fuel start-up boiler to adjust a working state of the first fuel start-up boiler and a working state of the second fuel start-up boiler.
Optionally, the control method further includes: when the first burner is in the initial stage of ignition, the first pair of air exhaust valves are controlled to be in an open state, and the first regulating valve is controlled to be in a closed state; when the first burner is in an ignition end state, the first pair of air exhaust valves are controlled to be in a closed state, and the first regulating valve is controlled to be in an open state.
Optionally, the control method further includes: when the second burner is in the initial stage of ignition, the second pair of air exhaust valves are controlled to be in an open state, and the second regulating valve is controlled to be in a closed state; when the second burner is in an ignition end state, the second regulating valve is controlled to be in an opening state, and the opening degree of the second pair of air exhaust valves is controlled, so that the pressure of steam discharged by the second fuel oil starting boiler is matched with the pressure of steam discharged by the first fuel oil starting boiler.
The above at least one technical scheme adopted by the embodiment of the application can achieve the following beneficial effects:
in the embodiment of the application, the fuel oil can be respectively supplied to the first burner and the second burner through the fuel oil inlet main pipe, and the fuel oil inlet pressure of the first burner and the fuel oil inlet pressure of the second burner can be adjusted by utilizing the first flow regulating valve, so that the fuel oil inlet pressure of the first burner and the fuel oil inlet pressure of the second burner are stable. In addition, the oil return pressure of the first combustor and the second combustor can be adjusted by using the second flow regulating valve, and then the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor are indirectly adjusted in a mode of adjusting the oil return pressure, so that the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor are more stable. Thereby, the problem of unstable working state of the steam supply equipment caused by unstable oil inlet pressure of the fuel oil starting boiler can be solved.
In addition, in an embodiment of the present application, the steam supply device may be provided with a first fuel start boiler and a second fuel start boiler. Thus, if one of the fuel oil starting boilers fails, the other fuel oil starting boiler can work normally, so that the problem that the steam supply equipment cannot work normally after the fuel oil starting boiler fails due to the fact that only one fuel oil starting boiler is arranged in the related technology can be solved. Moreover, in the embodiment of the application, when the required steam amount is small, the first fuel start boiler and the second fuel start boiler can be enabled to work together. When the required steam amount is large, the first fuel oil starting boiler and the second fuel oil starting boiler can be enabled to work simultaneously, and therefore the steam supply amount of the steam supply device can be matched with the steam demand amount more easily.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic view of a steam supply device according to an embodiment of the present application;
fig. 2 is a flowchart of a control method of a steam supply device according to an embodiment of the present application.
Reference numerals illustrate: 100-steam supply device; 110-an oil inlet main pipe; 1201-first flow regulating valve; 1202-a second flow regulating valve; 1203-pressure relief valve; 130-first fuel start-up boiler; 1301-a first burner; 1302-a first steam outlet; 140-second fuel start-up boiler; 1401-a second burner; 1402-a second steam outlet; 150-an oil return main pipe; 1601-first regulator valve; 1602-a first pair of empty exhaust valves; 1603-a second regulator valve; 1604-a second pair of empty exhaust valves; 170-steam header; 180-steam reformer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Furthermore, although terms used in the present application are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present application is understood, not simply by the actual terms used but by the meaning of each term lying within.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
The embodiment of the application provides steam supply equipment. Referring to fig. 1, in an embodiment of the present application, a steam supply apparatus 100 may include: an oil feed main pipe 110, a first flow rate adjusting valve 1201, a first oil-fired start-up boiler 130, a second oil-fired start-up boiler 140, a second flow rate adjusting valve 1202, an oil return main pipe 150, a first adjusting valve 1601, a first pair of empty exhaust valves 1602, a second adjusting valve 1603, a second pair of empty exhaust valves 1604 and a steam main pipe 170.
The first fuel start-up boiler 130 may include a first burner 1301, the second fuel start-up boiler 140 may include a second burner 1401, the oil inlet header 110 may be connected to a first flow rate adjustment valve 1201, the first flow rate adjustment valve 1201 may be connected to the first burner 1301 and the second burner 1401, respectively, the first burner 1301 and the second burner 1401 may be connected to a second flow rate adjustment valve 1202, respectively, and the second flow rate adjustment valve 1202 may be connected to the oil return header 150.
The first fuel start-up boiler 130 may be provided with a first steam outlet 1302, the second fuel start-up boiler 140 may be provided with a second steam outlet 1402, the first steam outlet 1302 may be connected with a first regulating valve 1601 and a first pair of empty steam exhaust valves 1602, respectively, the second steam outlet 1402 may be connected with a second regulating valve 1603 and a second pair of empty steam exhaust valves 1604, respectively, and the first regulating valve 1601 and the second regulating valve 1603 may both be connected with the steam header 170.
Illustratively, in the embodiment of the present application, the first and second adjusting valves 1601 and 1603 may be pressure adjusting valves, and the pressures of the steam delivered to the steam header 170 by the first and second fuel start-up boilers 130 and 140 may be adjusted by adjusting the opening degrees of the pressure adjusting valves, so that the pressures of the steam delivered to the steam header 170 may be derived to satisfy the use requirements.
In order to make the combustion effect of the first fuel start-up boiler 130 better, the first fuel start-up boiler 130 may be provided with 2 burners. That is, in an embodiment of the present application, the first burner 1301 may include a first sub-burner and a second sub-burner. Of course, in other embodiments of the present application, the first oil-fired start-up boiler 130 may be provided with only 1 burner, or the first oil-fired start-up boiler 130 may be provided with 3 burners, 4 burners, or other numbers of burners, which are not listed herein. In the embodiment of the present application, when one of the burners fails, the other burners can continue to operate until the number of burners provided in the first fuel start-up boiler 130 is 2 or more, so that the first fuel start-up boiler 130 can continue to operate. So that the first fuel start-up boiler 130 is not stopped when the burner is damaged.
Similarly, in an embodiment of the present application, the second burner 1401 may include a third sub-burner and a fourth sub-burner. Of course, in other embodiments of the present application, the second oil-fired start-up boiler 140 may be provided with only 1 burner, or the second oil-fired start-up boiler 140 may be provided with 3 burners, 4 burners, or other numbers of burners, which are not listed herein.
In addition, in the embodiment of the present application, each of the sub-burners may be provided with an oil feed regulating valve, and the amount of fuel supplied to each of the sub-burners may be regulated by the oil feed regulating valve.
In this way, in the embodiment of the present application, fuel may be supplied to the first burner 1301 and the second burner 1401 through the fuel inlet header 110, respectively, and the fuel inlet pressures of the first burner 1301 and the second burner 1401 may be adjusted using the first flow rate adjusting valve 1201, and the fuel inlet pressures of the first burner 1301 and the second burner 1401 may be made relatively stable. In addition, the oil return pressure of the first burner 1301 and the second burner 1401 can be adjusted by using the second flow adjusting valve 1202, and then the oil inlet pressure of the first burner 1301 and the second burner 1401 can be indirectly adjusted by adjusting the oil return pressure, so that the oil inlet pressure of the first burner 1301 and the second burner 1401 can be more stable. Thereby, the problem of unstable working state of the steam supply equipment caused by unstable oil inlet pressure of the fuel oil starting boiler can be solved.
In addition, in an embodiment of the present application, the steam supply apparatus 100 may be provided with a first oil-fired boiler 130 and a second oil-fired boiler 140. Thus, if one of the fuel oil starting boilers fails, the other fuel oil starting boiler can work normally, so that the problem that the steam supply equipment cannot work normally after the fuel oil starting boiler fails due to the fact that only one fuel oil starting boiler is arranged in the related technology can be solved. Also, in the embodiment of the present application, when the required amount of steam is small, the first and second oil-fired start-up boilers 130 and 140 may be operated one by one. When the required steam amount is large, the first and second oil-fired boilers 130 and 140 can be operated simultaneously, so that the steam supply amount of the steam supply apparatus 100 can be more easily matched with the steam demand amount.
Referring to fig. 1, in an embodiment of the present application, the steam supply apparatus 100 may further include a pressure reducing valve 1203, and the oil feed main 110 may be connected to the first flow regulating valve 1201 via the pressure reducing valve 1203. In this way, the pressure of the fuel supplied from the fuel inlet header 110 can be reduced by the pressure reducing valve 1203, and the first burner 1301 or the second burner 1401 can be prevented from being damaged due to the excessive pressure of the fuel supplied from the fuel inlet header 110.
Referring to fig. 1, in an embodiment of the present application, the steam supply device 100 may further include a steam relay 180, and the steam header 170 may be connected to the steam relay 180. Thus, in the embodiment of the present application, the steam generated from the first and second oil-fired boilers 130 and 140 may be transferred to the steam relay 180, and the steam may be distributed by the steam relay 180. For example, the steam relay 180 may be connected to different steam use devices, and the steam relay 180 may be utilized to distribute steam to the different steam use devices.
The embodiment of the application also provides a control method of the steam supply device, and the control method of the steam supply device provided by the embodiment of the application can be used for controlling any one of the steam supply devices provided by the embodiment of the application. Referring to fig. 2, in an embodiment of the present application, a control method of a steam supply device may include:
in step 210, fuel is supplied to the first fuel start-up boiler and the second fuel start-up boiler through the fuel inlet main pipe, respectively.
In the embodiment of the application, the oil inlet main pipe can be connected with the oil supply device, the oil supply device can be used for supplying the oil to the oil inlet main pipe, and further, the oil can be respectively conveyed to the first oil-starting boiler and the second oil-starting boiler by the oil inlet main pipe.
In the embodiment of the application, the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor can be obtained, and the first flow regulating valve and the second flow regulating valve can be controlled based on the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor, so that the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor are stable.
Step 220, controlling the first burner to perform ignition.
In an embodiment of the present application, the first burner may be controlled to be ignited after the first burner is filled with fuel. In the embodiment of the application, the first fuel oil starting boiler can be used as a main boiler, and the second fuel oil starting boiler can be used as an auxiliary boiler. Under normal conditions, the main boiler may be started first. The auxiliary boiler may be further started when the steam generated by the steam supply device cannot meet the demand.
Step 230, obtaining first color data of flue gas from a first fuel oil start boiler.
In the embodiment of the application, after the ignition of the first combustor is realized, the first color data of the smoke discharged by the first fuel oil starting boiler can be obtained, and it is noted that in the embodiment of the application, the first color data of the smoke discharged by the first fuel oil starting boiler can be obtained by means of image recognition. In addition, in the embodiment of the application, the first color data of the flue gas discharged from the first fuel oil starting boiler can be obtained by manually observing the mode of combining the control color card. The manner in which the first color data of the flue gas from the first fuel-operated boiler is obtained is not limited.
Step 240, adjusting an operating state of the first fuel start-up boiler based on the first color data.
In the embodiment of the application, after the first color data of the flue gas discharged from the first fuel oil starting boiler is acquired, the working state of the first fuel oil starting boiler can be adjusted based on the first color data. In this way, it is possible to judge whether the fuel supplied to the first fuel starting boiler is sufficiently combusted or not based on the first color data of the smoke discharged from the first fuel starting boiler. If the fuel oil combustion of the first fuel oil starting boiler is insufficient, the first air inlet quantity of the first fuel oil starting boiler can be increased. Thus, the oxygen supply amount can be increased by increasing the first air intake amount of the first fuel start-up boiler, and thus the fuel supplied to the first fuel start-up boiler can be sufficiently combusted.
Illustratively, in an embodiment of the present application, adjusting the operating state of the first fuel start-up boiler based on the first color data may specifically include: the first fuel supply amount of the first fuel start-up boiler and the first air intake amount of the first fuel start-up boiler are adjusted based on the first color data to adjust the operating state of the first fuel start-up boiler. For example, when the first color data of the flue gas is black, it may be determined that the fuel supplied to the first fuel start-up boiler is insufficiently combusted, so that the first air intake amount of the first fuel start-up boiler may be increased.
In the embodiment of the present application, the maximum value and the minimum value of the first fuel supply amount may be set so that the first fuel supply amount may be prevented from being excessively large or excessively small. The maximum and minimum values of the first air intake amount may be set so that the first air intake amount may be prevented from being excessively large or excessively small.
Further, in other embodiments of the present application, it is also possible to determine whether the fuel supplied to the first fuel start-up boiler is sufficiently burned in combination with the fire detection. There are many other ways of determining whether the fuel supplied to the first fuel start-up boiler has been sufficiently combusted, which are not illustrated herein. In the embodiment of the application, the first fuel start-up boiler can be controlled in a PID (Proportion Integral Differential, proportional, integral and differential) closed-loop control mode so as to improve the working stability of the first fuel start-up boiler.
Step 250, after the first burner completes the ignition, controlling the second burner to perform the ignition.
In the embodiment of the present application, after the first burner completes ignition, the second burner may be controlled to perform ignition. For example, in an embodiment of the present application, both the first oil-fired boiler and the second oil-fired boiler may be made to be in an operating state. For example, the first fuel oil starting boiler and the second fuel oil starting boiler can work in a medium load state, so that the problem that the first fuel oil starting boiler is easy to fail due to long-time work in a high load state when only the first fuel oil starting boiler works can be avoided.
Step 260, obtaining second color data of the flue gas of the second fuel oil start boiler.
In the embodiment of the application, after the ignition of the second combustor is realized, the second color data of the flue gas discharged by the second fuel oil starting boiler can be acquired in an image recognition mode. In addition, in the embodiment of the application, the second color data of the flue gas discharged from the second fuel oil starting boiler can be obtained by manually observing the mode of combining the control color card. The manner in which the second color data of the flue gas from the second fuel activated boiler is obtained is not limited.
Step 270, adjusting an operating state of the second fuel start-up boiler based on the second color data.
In the embodiment of the application, after the second color data of the flue gas discharged from the second fuel oil starting boiler is acquired, the working state of the second fuel oil starting boiler can be adjusted based on the second color data. In this way, it is possible to judge whether the fuel supplied to the second fuel starting boiler is sufficiently combusted or not based on the second color data of the smoke discharged from the second fuel starting boiler. If the fuel oil combustion of the second fuel oil starting boiler is insufficient, the second air inlet quantity of the second fuel oil starting boiler can be increased. Thus, the oxygen supply amount can be increased by increasing the second air intake amount of the second fuel start-up boiler, and thus the fuel supplied to the second fuel start-up boiler can be sufficiently combusted.
Illustratively, in an embodiment of the present application, obtaining second color data of flue gas discharged from a second fuel start-up boiler, and adjusting an operating state of the second fuel start-up boiler based on the second color data may specifically include: and acquiring second color data of smoke exhausted by the second fuel oil starting boiler, and adjusting second fuel oil supply quantity of the second fuel oil starting boiler and second air inlet quantity of the second fuel oil starting boiler based on the second color data so as to adjust the working state of the second fuel oil starting boiler. For example, when the second color data of the flue gas is black, it may be determined that the fuel supplied to the second fuel start-up boiler is insufficiently combusted, so that the second air intake amount of the second fuel start-up boiler may be increased.
In the embodiment of the present application, the maximum value and the minimum value of the second fuel supply amount may be set so that the second fuel supply amount may be prevented from being excessively large or excessively small. The maximum and minimum values of the second air intake amount may be set so that the second air intake amount may be prevented from being excessively large or excessively small.
In addition, in other embodiments of the present application, it is also possible to determine whether the fuel supplied to the second fuel start-up boiler is sufficiently burned in combination with the fire detection. There are many other ways of determining whether the fuel supplied to the second fuel start-up boiler has been sufficiently combusted, which are not illustrated herein. In the embodiment of the application, the second fuel start-up boiler can be controlled in a PID (Proportion Integral Differential, proportional, integral and differential) closed-loop control mode so as to improve the working stability of the second fuel start-up boiler.
In order to make the steam amount generated by the steam supply device match with the steam consumption, in the embodiment of the application, when the steam supply device is in an operating state, the steam pressure data of the tail end of the steam main pipe can be acquired, and the operating state of the first fuel start-up boiler and the operating state of the second fuel start-up boiler can be adjusted based on the steam pressure data. Illustratively, in an embodiment of the present application, the operating state of the first fuel-fired boiler and the operating state of the second fuel-fired boiler may be adjusted in combination with a feed-forward correction.
For example, when the steam pressure data of the end of the steam header is reduced, it may be determined that the amount of steam generated by the steam supply device is smaller than the steam consumption amount, the first fuel supply amount of the first fuel start-up boiler and the first air intake amount of the first fuel start-up boiler may be increased, and the second fuel supply amount of the second fuel start-up boiler and the second air intake amount of the second fuel start-up boiler may be increased to increase the amount of steam generated by the steam supply device. When the steam pressure data of the tail end of the steam header is increased, it can be determined that the steam amount generated by the steam supply device is greater than the steam consumption amount, the first fuel supply amount of the first fuel start-up boiler and the first air intake amount of the first fuel start-up boiler can be reduced, and the second fuel supply amount of the second fuel start-up boiler and the second air intake amount of the second fuel start-up boiler can be reduced, so that the steam amount generated by the steam supply device is reduced.
Illustratively, in an embodiment of the present application, adjusting the operating state of the first fuel start-up boiler and the operating state of the second fuel start-up boiler based on the steam pressure data may specifically include: based on the steam pressure data, the first fuel supply amount of the first fuel start-up boiler and the first air intake amount of the first fuel start-up boiler are adjusted, and the second fuel supply amount of the second fuel start-up boiler and the second air intake amount of the second fuel start-up boiler are adjusted to adjust the working state of the first fuel start-up boiler and the working state of the second fuel start-up boiler.
In an embodiment of the present application, the control method of the steam supply device may further include: when the first burner is in the initial stage of ignition, the first pair of air exhaust valves are controlled to be in an open state, and the first regulating valve is controlled to be in a closed state; when the first burner is in an ignition end state, the first pair of air exhaust valves are controlled to be in a closed state, and the first regulating valve is controlled to be in an open state. Thus, in the embodiment of the application, when the first burner is at the initial stage of ignition, the first pair of air exhaust valves can be utilized for exhausting air, and the overheat of the steam supply device can be prevented.
It should be noted that, in an embodiment of the present application, the control method of the steam supply device may further include: when the second burner is in the initial stage of ignition, the second pair of air exhaust valves are controlled to be in an open state, and the second regulating valve is controlled to be in a closed state; when the second burner is in the ignition end state, the second regulating valve is controlled to be in an opening state, and the opening degree of the second pair of air exhaust steam valves is controlled, so that the pressure of steam exhausted by the second fuel oil starting boiler is matched with the pressure of steam exhausted by the first fuel oil starting boiler.
It should be noted that, in the embodiment of the present application, the steam supply device may also perform cooperative control with the generator set, for example, the steam supply device may be controlled to send an operating parameter of the steam supply device to the generator set, and the generator set may also be controlled to send an operating parameter of the generator set to the steam supply device. In this way, the cooperative control of the steam supply device and the generator set is facilitated.
In an embodiment of the present application, in case the steam supply device includes the steam relay, a steam pressure value of the steam relay may be acquired, and an operation state of the first fuel start-up boiler and/or an operation state of the second fuel start-up boiler may be controlled based on the steam pressure value of the steam relay. For example, when the steam pressure value of the steam reformer is low, the first fuel-operated boiler may be operated at a higher load, and/or the second fuel-operated boiler may be operated at a higher load.
In the embodiment of the application, in the process of conveying the steam discharged by the second fuel oil starting boiler to the steam transfer device, the pressure of the steam discharged by the second fuel oil starting boiler is slightly higher than that of the steam transfer device, so that the steam discharged by the second fuel oil starting boiler can be conveniently and smoothly conveyed to the steam transfer device.
In the embodiment of the application, after the steam discharged from the first fuel oil starting boiler and the steam discharged from the second fuel oil starting boiler can be smoothly conveyed into the steam transfer device, the loads of the first fuel oil starting boiler and the second fuel oil starting boiler can be leveled through the load leveling loop. By way of example, the load of the first and second fuel start-up boilers may be leveled by adjusting the first fuel supply amount of the first fuel start-up boiler and the second fuel supply amount of the second fuel start-up boiler, and by adjusting the first air intake amount of the first fuel start-up boiler and the second air intake amount of the second fuel start-up boiler.
In this way, in the embodiment of the application, the fuel oil can be respectively supplied to the first burner and the second burner through the fuel oil inlet main pipe, the fuel oil inlet pressure of the first burner and the fuel oil inlet pressure of the second burner can be adjusted by using the first flow regulating valve, and the fuel oil inlet pressure of the first burner and the fuel oil inlet pressure of the second burner can be stable. In addition, the oil return pressure of the first combustor and the second combustor can be adjusted by using the second flow regulating valve, and then the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor are indirectly adjusted in a mode of adjusting the oil return pressure, so that the oil inlet pressure of the first combustor and the oil inlet pressure of the second combustor are more stable. Thereby, the problem of unstable working state of the steam supply equipment caused by unstable oil inlet pressure of the fuel oil starting boiler can be solved.
In addition, in an embodiment of the present application, the steam supply device may be provided with a first fuel start boiler and a second fuel start boiler. Thus, if one of the fuel oil starting boilers fails, the other fuel oil starting boiler can work normally, so that the problem that the steam supply equipment cannot work normally after the fuel oil starting boiler fails due to the fact that only one fuel oil starting boiler is arranged in the related technology can be solved. Moreover, in the embodiment of the application, when the required steam amount is small, the first fuel start boiler and the second fuel start boiler can be enabled to work together. When the required steam amount is large, the first fuel oil starting boiler and the second fuel oil starting boiler can be enabled to work simultaneously, and therefore the steam supply amount of the steam supply device can be matched with the steam demand amount more easily.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made therein without departing from the principles and spirit of the embodiments of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A control method of a steam supply apparatus, characterized in that the steam supply apparatus comprises: an oil inlet main pipe, a first flow regulating valve, a first oil-fired start boiler, a second flow regulating valve, an oil return main pipe, a first regulating valve, a first pair of empty steam exhaust valves, a second regulating valve, a second pair of empty steam exhaust valves and a steam main pipe;
the first fuel oil starting boiler comprises a first burner, the second fuel oil starting boiler comprises a second burner, the oil inlet main pipe is connected with the first flow regulating valve, the first flow regulating valve is respectively connected with the first burner and the second burner, the first burner and the second burner are both connected with the second flow regulating valve, the second flow regulating valve is connected with the oil return main pipe,
the first fuel oil starting boiler is provided with a first steam outlet, the second fuel oil starting boiler is provided with a second steam outlet, the first steam outlet is respectively connected with the first regulating valve and the first pair of empty steam exhaust valves, the second steam outlet is respectively connected with the second regulating valve and the second pair of empty steam exhaust valves, and the first regulating valve and the second regulating valve are both connected with the steam main pipe;
the control method comprises the following steps:
supplying fuel oil to the first fuel oil starting boiler and the second fuel oil starting boiler through the fuel oil inlet main pipe respectively;
controlling the first burner to ignite;
acquiring first color data of smoke generated by starting a boiler grate by the first fuel;
adjusting the working state of the first fuel oil starting boiler based on the first color data;
after the first burner finishes ignition, controlling the second burner to ignite, wherein when the second burner is in an initial ignition stage, controlling the second pair of air exhaust valves to be in an open state, controlling the second regulating valve to be in a closed state, and when the second burner is in an ignition end state, controlling the second regulating valve to be in an open state, and controlling the opening degree of the second pair of air exhaust valves so that the pressure of steam discharged by the second fuel starting boiler is matched with the pressure of steam discharged by the first fuel starting boiler;
acquiring second color data of smoke generated by the second fuel oil starting boiler;
and adjusting the working state of the second fuel oil starting boiler based on the second color data.
2. The control method of a steam supply apparatus according to claim 1, wherein the steam supply apparatus further comprises a pressure reducing valve, and the oil feed main pipe is connected to the first flow rate adjusting valve via the pressure reducing valve.
3. The control method of a steam supply apparatus according to claim 1, wherein the steam supply apparatus further comprises a steam relay, and the steam header is connected to the steam relay.
4. The control method of the steam supply apparatus according to claim 1, wherein the adjusting the operation state of the first fuel start-up boiler based on the first color data includes:
and adjusting the first fuel supply amount of the first fuel start boiler and the first air intake amount of the first fuel start boiler based on the first color data so as to adjust the working state of the first fuel start boiler.
5. The control method of the steam supply apparatus according to claim 1, wherein the adjusting the operating state of the second fuel start-up boiler based on the second color data includes:
and adjusting a second fuel supply amount of the second fuel start boiler and a second air intake amount of the second fuel start boiler based on the second color data so as to adjust the working state of the second fuel start boiler.
6. The control method of a steam supply apparatus according to claim 1, characterized in that the control method further comprises:
acquiring steam pressure data of the tail end of the steam main pipe;
and adjusting the working state of the first fuel oil starting boiler and the working state of the second fuel oil starting boiler based on the steam pressure data.
7. The control method of the steam supply device according to claim 6, wherein the adjusting the operation state of the first fuel start-up boiler and the operation state of the second fuel start-up boiler based on the steam pressure data includes:
based on the steam pressure data, adjusting a first fuel supply amount of the first fuel start-up boiler and a first air intake amount of the first fuel start-up boiler, and adjusting a second fuel supply amount of the second fuel start-up boiler and a second air intake amount of the second fuel start-up boiler to adjust a working state of the first fuel start-up boiler and a working state of the second fuel start-up boiler.
8. The control method of a steam supply apparatus according to claim 1, characterized in that the control method further comprises:
when the first burner is in the initial stage of ignition, the first pair of air exhaust valves are controlled to be in an open state, and the first regulating valve is controlled to be in a closed state;
when the first burner is in an ignition end state, the first pair of air exhaust valves are controlled to be in a closed state, and the first regulating valve is controlled to be in an open state.
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