CN113898970A - Method and device for processing primary fan fault of single-series auxiliary coal-fired unit without shutdown - Google Patents
Method and device for processing primary fan fault of single-series auxiliary coal-fired unit without shutdown Download PDFInfo
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- 238000012545 processing Methods 0.000 title claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 31
- 239000003921 oil Substances 0.000 claims abstract description 26
- 239000000295 fuel oil Substances 0.000 claims abstract description 12
- 238000010298 pulverizing process Methods 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 19
- 238000005507 spraying Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 18
- 230000008859 change Effects 0.000 description 17
- 239000000779 smoke Substances 0.000 description 16
- 238000009826 distribution Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
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- 238000004377 microelectronic Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011418 maintenance treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 238000011282 treatment Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/02—Arrangements of fans or blowers
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a method and a device for processing primary fan faults of a single-series auxiliary coal-fired unit without shutdown, which comprises the steps of closing a powder making device through a control unit, controlling an oil-fired burner to start through the control unit, spraying fuel oil by the oil-fired burner, and burning the fuel oil to provide heat for a boiler; the primary air fan is closed through the control unit, and fault processing is carried out on the primary air fan; after the primary air fan is cleared of faults, the primary air fan is started through the control unit, the powder making device is started at the same time, and the oil-fired burner is closed; under the condition that the primary fan fails and needs to be shut down to overhaul the pulverized coal burner, the operation of starting the oil burner is put into operation to replace the pulverized coal burner in the pulverizing device, so that a certain load carrying capacity of the coal-fired boiler is maintained, the continuous operation of the coal-fired unit is maintained, the continuous operation of the single-series auxiliary coal-fired unit with a certain load can be realized, and the interruption of external power supply and heat supply caused by the unplanned shutdown of the unit is avoided.
Description
Technical Field
The invention relates to the technical field of primary fan fault maintenance in coal-fired units, in particular to a method and a device for processing primary fan faults of a single-series auxiliary coal-fired unit without shutdown.
Background
The main auxiliary equipment of the boiler air smoke system of the traditional double-system auxiliary coal-fired unit is arranged according to two sets and is mutually standby, when the main auxiliary equipment of the air smoke system breaks down, the unit can still carry 50% of rated load after the failure auxiliary equipment is shut down, and power supply and heat supply of a power plant to the outside are not influenced. The single-series auxiliary coal-fired unit is main auxiliary equipment of a boiler flue gas system of a coal-fired power plant, such as a primary fan, an induced draft fan, a blower, an air preheater and the like, and adopts single auxiliary machine arrangement. The main auxiliary machines of the boiler air-smoke system are arranged in a single series, so that the floor area is reduced, and the land acquisition cost of the capital construction project of the thermal power plant is greatly reduced; two sets of auxiliary machine systems are changed into one set, so that equipment investment and later maintenance cost are reduced; because the number of rotating equipment is reduced, the service power consumption is reduced during operation, and the power supply capacity of a power plant is improved. Although the single-series auxiliary coal-fired unit has the advantages, the requirements on the quality and reliability of auxiliary equipment are very high, once the main auxiliary equipment fails, the unit is not scheduled to stop running, and the reliability of external power supply and heat supply of the single-series auxiliary coal-fired unit is influenced.
In the prior art, when any one main auxiliary equipment of the air-smoke system of the coal-fired unit boiler with the single series of auxiliary machines breaks down, the coal-fired boiler needs to be shut down to overhaul the broken main auxiliary equipment, so that the coal-fired unit is shut down unplanned, and the external power supply and heat supply are interrupted.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
Therefore, the technical problems to be solved by the invention are as follows: in the prior art, when any main auxiliary equipment of a boiler air-smoke system of a single-series auxiliary coal-fired unit fails, the main auxiliary equipment with the failure can be overhauled only by stopping the coal-fired boiler, so that the coal-fired unit is not stopped in plan, and the external power supply and heat supply are interrupted.
In order to solve the technical problems, the invention provides the following technical scheme: a method and apparatus for processing the primary fan trouble of coal-fired unit of single-series auxiliary engine without shutting down, it includes closing the powder making device through the control unit at first, and control the starting of the oil burner through the control unit, the oil burner sprays the fuel, the fuel burning provides the heat for the boiler; the primary air fan is closed through the control unit, and fault processing is carried out on the primary air fan; and after the primary air fan is cleared of faults, starting the primary air fan through the control unit, simultaneously starting the powder making device, and closing the oil-fired burner.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: the fault alarm signal sent by the primary air fan is collected through the collection unit, and the fault alarm signal is converted into a first signal.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: the acquisition unit is in wireless connection with the control unit and sends the first signal to the control unit.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: the control unit receives the first signal and sends a first instruction to the powder making device, and the powder making device is closed after receiving the first instruction; and meanwhile, the control unit sends a second instruction to the fuel burner, and the fuel burner is closed after receiving the second instruction.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: and the control unit sends a third instruction to the primary air fan after receiving the first signal, the primary air fan is closed after receiving the third instruction, and fault processing is carried out on the primary air fan in a manual mode.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: after the primary air fan fault is eliminated, a second signal is sent to the control unit through the acquisition unit, the control unit sends a fourth instruction to the primary air fan after receiving the second signal, and the primary air fan is started after receiving the fourth instruction; and meanwhile, the control unit sends a fifth instruction to the powder making device, the powder making device is closed after receiving the fifth instruction, a sixth instruction is sent to the fuel burner, and the fuel burner is closed after receiving the sixth instruction.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: the device comprises a control unit, the control unit is provided with a second signal transmitter, the pulverizing device is provided with a first receiver, the fuel oil burner is provided with a second receiver, the primary air fan is provided with a third receiver, and the signal transmitter is respectively in wireless connection with the first receiver, the second receiver and the third receiver.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: still include the acquisition unit, the acquisition unit includes inductor and first signal transmitter, inductor electric connection first signal transmitter.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: and the control unit is provided with a fourth receiver, and the first signal transmitter is in wireless connection with the fourth receiver.
As a preferred scheme of the method and the device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine, the method comprises the following steps: the sensor may be a photosensor or a microphone.
The invention has the beneficial effects that: the invention utilizes the starting oil burner of the boiler combustion system of the single-series auxiliary coal-fired unit, under the condition that the primary fan has a fault and needs to be shut down to overhaul the coal-fired burner to be not put into operation, the operation of the starting oil burner is put into operation to replace the action of the coal-fired burner in the powder preparation device, a certain load capacity of the coal-fired boiler is maintained, the continuous operation of the coal-fired unit is maintained, the continuous operation of the single-series auxiliary coal-fired unit with a certain load can be realized, the external power supply and heat supply interruption caused by the unplanned shutdown of the unit are avoided
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic diagram of the connection of a control unit in the first embodiment.
Fig. 2 is a schematic diagram of the connection between the acquisition unit and the control unit in the first embodiment.
Fig. 3 is a smoke system diagram of a single-series auxiliary coal-fired unit in the second embodiment.
Fig. 4 is a flow chart of a validation fault condition in a second embodiment.
FIG. 5 is a flowchart showing the detailed operation steps in the fourth embodiment.
FIG. 6 is a flowchart showing the detailed operation steps in the fourth embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 and 2, a first embodiment of the present invention provides a method and apparatus for handling a failure of a primary fan of a single-train auxiliary coal-fired unit without shutdown, which comprises first shutting down a coal pulverizing apparatus 201 through a control unit 200, using pulverized coal for the existing coal pulverizing apparatus 201 for the coal-fired unit, pulverized coal is blown into a boiler to be fully combusted, heat is provided for the boiler, the control unit 200 controls the oil burner 202 to be started, the oil burner 202 sprays fuel oil, the fuel oil is combusted to provide heat for the boiler, the conventional coal-fired unit generally adopts a coal blending and combusting method, a plurality of different coal types are mixed and fed into a hearth to be combusted, the method causes unstable easy combustion, and generally sprays fuel oil through the fuel oil burner 202 to stabilize the combustion condition, and the fuel oil burners 202 in the existing coal-fired unit are generally provided with a plurality of groups which mainly play a role in stabilizing the combustion.
And the primary fan M is closed through the control unit 200, the primary fan M is stopped due to faults, after the primary fan M is closed, the situation that the primary fan M is started by mistake in the fault processing process is avoided, potential safety hazards are caused, and the primary fan M is subjected to fault processing through maintenance personnel.
After the failure of the primary air fan M is eliminated, the primary air fan M is started through the control unit 200, and at the same time, the powder making device 201 is started, and the fuel burner 202 is closed. The control unit 200 may be an MCU of STM32 series, for example, STM32F103C8T6, and is capable of controlling the start or stop of the pulverizing device 201, the oil burner 202 and the primary air fan M.
By using the self-provided starting oil burner 202 of the boiler combustion system of the single-series auxiliary coal-fired unit, under the condition that the primary fan fails and needs to be stopped to overhaul the coal-fired burner, the starting oil burner 202 is put into operation to replace the coal-fired burner in the powder making device 201, so that a certain load capacity of the coal-fired boiler is maintained, and the continuous operation of the coal-fired unit is maintained.
When only a primary fan of a boiler air-smoke system of a single-series auxiliary coal-fired unit fails, a boiler coal pulverizing system and a pulverized coal burner cannot be normally put into operation, but if main auxiliary equipment of the air-smoke system such as a boiler blower, an induced draft fan and the like has no failure, the normal operation of the boiler air-smoke system can be ensured, conditions can be created for the starting oil burner or the combustion-supporting oil burner of the boiler combustion system to be put into operation by adjusting secondary air distribution of the pulverized coal burner, the coal-fired boiler can be regarded as an oil-fired boiler at the moment, the boiler of the single-series auxiliary coal-fired unit can continuously operate with a certain load, and external power supply and heat supply interruption caused by unplanned shutdown of the unit are avoided.
Example 2
Referring to fig. 3 to 6, a second embodiment of the present invention, which is based on the previous embodiment,
in this embodiment, a fault alarm signal sent by the primary air fan M is collected by the collecting unit 100, and the fault alarm signal is converted into a first signal. In practice, when the primary air fan M breaks down, an audible and visual alarm is provided to give out strong sound and flash light for alarming.
In this embodiment, specifically, the acquisition unit 100 establishes a wireless connection with the control unit 200, and sends the first signal to the control unit 200; the control unit 200 receives the first signal and sends a first instruction to the powder making device 201, and the powder making device 201 is closed after receiving the first instruction; meanwhile, the control unit 200 sends a second instruction to the fuel burner 202, and the fuel burner 202 is closed after receiving the second instruction; and after receiving the first signal, the control unit 200 sends a third instruction to the primary air fan M, and after receiving the third instruction, the primary air fan M is turned off, and the failure processing is performed on the primary air fan M in a manual mode.
In this embodiment, specifically, after the failure of the primary air fan M is cleared, the acquisition unit 100 sends a second signal to the control unit 200, after receiving the second signal, the control unit 200 sends a fourth instruction to the primary air fan M, and after receiving the fourth instruction, the primary air fan M is started; meanwhile, the control unit 200 sends a fifth instruction to the powder making device 201, the powder making device 201 is closed after receiving the fifth instruction, a sixth instruction is sent to the fuel burner 202, and the fuel burner 202 is closed after receiving the sixth instruction.
In this embodiment, specifically, the control unit 200 is provided with a second signal transmitter 203, the pulverizing device 201 is provided with a first receiver 201a, the fuel burner 202 is provided with a second receiver 202a, the primary air fan M is provided with a third receiver Ma, and the signal transmitter 203 establishes wireless connection with the first receiver 201a, the second receiver 202a, and the third receiver Ma respectively. The control unit 200 in the present invention may be an MCU of the STM32 series, for example, STM32F103C8T 6; the second signal transmitter 203 can be selected from GENAD/Gordonid wireless transmission transmitters GN1-130-620, the control unit 200 inputs signals into the second signal transmitter 203, and the second signal transmitter 203 can transmit signals; the first receiver 201a, the second receiver 202a and the third receiver Ma may be selected from the existing microelectronic phase-sensitive receivers MO31-JXW-25A, and are used for receiving the signals sent by the second signal transmitter 203, and controlling the start or stop of the pulverizing device 201, the oil burner 202 and the primary air fan M according to different command signals,
in this embodiment, the portable electronic device further includes an acquisition unit 100, where the acquisition unit 100 includes an inductor 101 and a first signal emitter 102, and the inductor 101 is electrically connected to the first signal emitter 102. The audible and visual alarm can be sensed by the sensor 101, strong sound and flash are emitted, a sound or light signal is converted into an electric signal to be transmitted to the first signal transmitter 102, the first signal transmitter 102 is in wireless connection with the fourth receiver 204, the first signal transmitter 102 transmits the signal to the fourth receiver 204, and the fourth receiver 204 receives the signal and then inputs the signal to the control unit 200; the fourth receiver 204 may be selected from the existing microelectronic phase sensitive receivers MO31-JXW-25A for receiving the signal from the first signal transmitter 102.
In this embodiment, the sensor 101 may be a photoelectric sensor or a sound pickup. Can change the light signal that the alarm sent into the signal of telecommunication through current photoelectric sensor, can change the acoustic signal that the alarm sent into the signal of telecommunication through current adapter, be convenient for input first signal transmitter, will produce on the information transmission to the control unit 200 of trouble.
Example 3
Referring to fig. 3 to 6, a third embodiment of the present invention is based on the previous embodiment, and the determining whether the coal-fired unit of the single-series auxiliary machinery has the condition of handling the failure of the primary air fan without stopping includes:
(1) and (3) confirming that the primary fan M of the boiler air-smoke system of the single-series auxiliary coal-fired unit fails, and the failure is clear and can be repaired, but the maintenance treatment cannot be carried out without stopping the operation.
(2) And (3) confirming that the boiler air-smoke system of the single-series auxiliary coal-fired unit is normal in operation except for the primary fan M and has no other defects influencing the normal operation of the boiler air-smoke system.
(3) And confirming that the electric feed pump of the boiler feed water system of the single-series auxiliary coal-fired unit runs reliably or is standby.
(4) And confirming that all oil burners of the single-series auxiliary coal-fired unit boiler reliably operate or are standby, and the heat load requirement of 10-15% rated output of the single-series auxiliary coal-fired unit boiler can be met when all the oil burners operate.
(5) And (4) confirming that the fuel oil used by the oil burner of the single-series auxiliary coal-fired unit is sufficient, or else, promptly purchasing to meet the inventory requirement.
Example 4
Referring to fig. 3 to 6, a fourth embodiment of the present invention is based on the above three embodiments, and the embodiment provides specific implementation steps of a method for processing primary air fan failure without stopping a single-series auxiliary coal-fired unit
(1) Reducing the load of the turbo generator unit to 40 percent of rated load, and controlling the temperature change rate of main steam and reheated steam at the boiler side to be less than or equal to 2 ℃/min and the pressure change rate to be less than or equal to 0.1 Mpa/min.
(2) And continuously reducing the load of the steam turbine generator unit to 30 percent of rated load, controlling the temperature change rate of main steam and reheat steam at the boiler side to be less than or equal to 2 ℃/min and the pressure change rate to be less than or equal to 0.1Mpa/min, controlling the temperature of the main steam and the reheat steam to be at specified values corresponding to the 30 percent of rated load of the generator unit, controlling the metal temperature change rate of a heating surface of the boiler to be less than or equal to 1.5 ℃/min in the process, and simultaneously stopping the operation of redundant powder making systems at proper time according to the load requirements of the boiler.
(3) According to the practical situation of the coal-fired power plant, the service power is switched when necessary, and the service 6kV (or 10kV) bus is switched to the standby power supply by the working power supply to be connected, so that the whole plant power loss caused by misoperation is prevented.
(4) If the boiler type of the single-series auxiliary coal-fired unit is a direct-current boiler, the dry-state operation of the boiler is changed into the wet-state operation, if the boiler is provided with a boiler water circulating pump (BCP pump), the boiler water circulating pump is started to operate, the heat loss of the boiler is reduced, and if the boiler is not provided with the boiler water circulating pump (BCP pump), the water supply quantity of the boiler is reasonably controlled, and the boiler water discharge is reduced.
(5) If the boiler water-feeding pump is a steam-driven water-feeding pump, the steam-driven water-feeding pump is switched to an electric water-feeding pump to operate, and normal boiler water feeding is ensured.
(6) The load of the steam turbine generator unit is continuously reduced to 20% of rated load, the 2 sets of pulverizing systems 201 are kept running, the combustion oil burner of the running pulverized coal burner is put into operation, the air distribution of the pulverized coal burner is adjusted in time, the combustion stability of the boiler is maintained, the temperature change rate of main steam and reheat steam at the boiler side is controlled to be less than or equal to 2 ℃/min, the pressure change rate is controlled to be less than or equal to 0.1Mpa/min, and the temperature of the main steam and the reheat steam is controlled to be a specified value corresponding to the 20% of rated load of the unit.
(7) The load of the steam turbine generator unit is continuously reduced to 10% of rated load, 1 set of the powder making system 201 is kept running, all the combustion-supporting oil burners are put into operation, the air distribution of the coal powder burners is adjusted in time, the combustion stability of the boiler is maintained, the temperature change rate of main steam and reheat steam on the boiler side is controlled to be less than or equal to 2 ℃/min, the pressure change rate is controlled to be less than or equal to 0.1Mpa/min, and the temperature of the main steam and the reheat steam is controlled to be a specified value correspondingly required by the 10% of rated load of the unit.
(8) And (3) stopping the operation of the last 1 set of the powder preparation system 201, adjusting the air distribution of the pulverized coal burner in time, maintaining the stable combustion of the combustion-supporting oil burner 202, gradually starting the fuel-supporting oil burner 202 by gradually closing the powder preparation system 201, being beneficial to maintaining the stable combustion heat provided for the boiler, and avoiding the unstable combustion, influencing the heat output and causing the unstable power generation.
(9) And stopping the primary fan M of the boiler air-smoke system, executing relevant maintenance safety measures and informing equipment maintenance and repair personnel of maintenance and repair.
(10) In the process of repairing the primary fan M of the boiler air-smoke system, attention is paid to monitoring the operation condition of the boiler combustion-supporting oil burner 202, the burner air distribution is adjusted in time, the combustion stability of the combustion-supporting oil burner 202 is maintained, meanwhile attention is paid to monitoring the fuel stock condition, and the fuel is supplemented in time when the fuel is insufficient.
(11) And (5) after the fault treatment of the primary fan M of the boiler air-smoke system is finished, recovering the relevant maintenance safety measures.
(12) Starting a primary fan M of a boiler air-smoke system, adjusting the operation parameters of the primary fan M, putting 1 set of powder preparation system into operation, adjusting the air distribution of the pulverized coal burner in time and maintaining the stable combustion of the boiler.
(13) And (3) putting the 2 nd set of pulverizing system 201 into operation, increasing the load of the steam turbine generator unit to 20 percent of rated load, adjusting the air distribution of the pulverized coal burner in time, maintaining the combustion stability of the boiler, controlling the temperature change rate of main steam and reheat steam at the boiler side to be less than or equal to 2 ℃/min, controlling the pressure change rate to be less than or equal to 0.1Mpa/min, and controlling the temperature of the main steam and the reheat steam to be at the specified value correspondingly required by the 20 percent of rated load of the unit.
(14) And (3) putting the set of the powder making system 201 in the 3 rd set to operate, increasing the load of the steam turbine generator unit to 30% of rated load, withdrawing part of the combustion-supporting oil burners 202 to operate according to the combustion condition of the boiler, adjusting the air distribution of the coal powder burners in time, maintaining the combustion stability of the boiler, controlling the temperature change rate of main steam and reheat steam at the boiler side to be less than or equal to 2 ℃/min and the pressure change rate to be less than or equal to 0.1Mpa/min, and controlling the temperature of the main steam and the reheat steam to be at the specified value corresponding to the requirement of 20% of rated load of the unit.
(15) If the boiler type of the single-series auxiliary coal-fired unit is a once-through boiler, the boiler is changed from wet operation to dry operation, and if the boiler is provided with a boiler water circulating pump (BCP pump), the boiler water circulating pump is stopped.
(16) And if the boiler water-feeding pump is a steam-driven water-feeding pump, switching the electric water-feeding pump to the steam-driven water-feeding pump to operate, and stopping operating the electric water-feeding pump after ensuring that the boiler water-feeding is normal.
(17) According to the actual situation of the coal-fired power plant, if the service power is switched, the service power is switched again, and the service 6kV (or 10kV) bus is switched from the standby power supply to the working power supply for carrying.
(18) The load of the steam turbine generator unit is reduced to 50% of rated load, the standby powder making system is operated according to the load requirement of the boiler, all the combustion-supporting oil burners 202 are closed, the air distribution of the coal powder burners is adjusted in time, the combustion stability of the boiler is maintained, the temperature of main steam and reheat steam on the boiler side is raised to rated parameters, the temperature change rate of the main steam and the reheat steam on the boiler side is controlled to be less than or equal to 2 ℃/min, and the pressure change rate is controlled to be less than or equal to 0.1 Mpa/min.
(19) The method for processing the primary fan fault of the single-series auxiliary coal-fired unit without stopping the machine is implemented by the steps.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for processing the failure of a primary fan of a single-series auxiliary coal-fired unit without stopping is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
firstly, the powder making device (201) is closed through the control unit (200), the control unit (200) controls the starting of the oil burner (202), the oil burner (202) sprays fuel oil, and the fuel oil is burnt to provide heat for the boiler;
the primary air fan (M) is closed through the control unit (200), and fault processing is carried out on the primary air fan (M);
after the primary air fan (M) is cleared of faults, the primary air fan (M) is started through the control unit (200), the powder making device (201) is started at the same time, and the fuel oil burner (202) is closed.
2. The method for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine as claimed in claim 1, wherein the method comprises the following steps: the method comprises the steps of collecting a fault alarm signal sent by a primary air fan (M) through a collecting unit (100), and converting the fault alarm signal into a first signal.
3. The method for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine as claimed in claim 2, wherein the method comprises the following steps: the acquisition unit (100) establishes a wireless connection with the control unit (200) and transmits the first signal to the control unit (200).
4. The method for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine as claimed in claim 1, wherein the method comprises the following steps: the control unit (200) receives a first signal and sends a first instruction to the powder making device (201), and the powder making device (201) is closed after receiving the first instruction;
meanwhile, the control unit (200) sends a second instruction to the fuel burner (202), and the fuel burner (202) is closed after receiving the second instruction.
5. The method for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine as claimed in claim 1, wherein the method comprises the following steps: and after receiving the first signal, the control unit (200) sends a third instruction to the primary air fan (M), the primary air fan (M) is closed after receiving the third instruction, and fault processing is carried out on the primary air fan (M) in a manual mode.
6. The method for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine as claimed in claim 1, wherein the method comprises the following steps: after the primary air fan (M) is cleared of faults, a second signal is sent to the control unit (200) through the acquisition unit (100), the control unit (200) sends a fourth instruction to the primary air fan (M) after receiving the second signal, and the primary air fan (M) is started after receiving the fourth instruction;
meanwhile, the control unit (200) sends a fifth instruction to the powder making device (201), the powder making device (201) is closed after receiving the fifth instruction, a sixth instruction is sent to the fuel burner (202), and the fuel burner (202) is closed after receiving the sixth instruction.
7. The utility model provides a device of single series of auxiliary engine coal-fired unit primary air fan trouble is handled not shutting down which characterized in that: the device is characterized by comprising a control unit (200), wherein a second signal transmitter (203) is arranged on the control unit (200), a first receiver (201a) is arranged on a pulverizing device (201), a second receiver (202a) is arranged on a fuel combustor (202), a third receiver (Ma) is arranged on a primary air fan (M), and the signal transmitter (203) is respectively in wireless connection with the first receiver (201a), the second receiver (202a) and the third receiver (Ma).
8. The device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine according to claim 7, wherein: the sensor is characterized by further comprising an acquisition unit (100), wherein the acquisition unit (100) comprises an inductor (101) and a first signal transmitter (102), and the inductor (101) is electrically connected with the first signal transmitter (102).
9. The device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine according to claim 8, wherein: the control unit (200) is provided with a fourth receiver (204), and the first signal transmitter (102) is in wireless connection with the fourth receiver (204).
10. The device for processing the failure of the primary fan of the single-series auxiliary coal-fired unit without stopping the machine according to claim 9, wherein: the sensor (101) may be a photosensor or a microphone.
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| CN202111285822.5A CN113898970A (en) | 2021-11-02 | 2021-11-02 | Method and device for processing primary fan fault of single-series auxiliary coal-fired unit without shutdown |
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| CN202111285822.5A CN113898970A (en) | 2021-11-02 | 2021-11-02 | Method and device for processing primary fan fault of single-series auxiliary coal-fired unit without shutdown |
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| CN202111285822.5A Pending CN113898970A (en) | 2021-11-02 | 2021-11-02 | Method and device for processing primary fan fault of single-series auxiliary coal-fired unit without shutdown |
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