CN113606002A - Low-pressure cylinder zero-output heat supply system and method - Google Patents
Low-pressure cylinder zero-output heat supply system and method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
Abstract
The invention provides a zero-output heating system and a zero-output heating method for a low-pressure cylinder, which comprise the following steps: an intermediate pressure cylinder; the low pressure cylinder is communicated with the intermediate pressure cylinder through a first pipeline and a second pipeline; the condensate outlet is communicated with the low-pressure cylinder through a third pipeline; the low-pressure cylinder steam inlet butterfly valve is connected in series with the first pipeline and is provided with a first control end and a first valve core, and the first control end is used for controlling the first valve core to block the first pipeline; the cooling steam regulating valve is connected in series with the second pipeline and is provided with a second control end and a second valve core, and the second control end is used for controlling the second valve core to block the second pipeline; and the low-pressure cylinder water spray regulating valve is connected in series with the third pipeline and is provided with a third control end and a third valve core, and the third control end is used for controlling the third valve core to block the third pipeline. The problem that the unit can not stably run under the working condition of low-pressure cylinder output in the prior art is solved.
Description
Technical Field
The document relates to the technical field of zero-output heat supply of low-pressure cylinders, in particular to a zero-output heat supply system and method of a low-pressure cylinder.
Background
The zero-output heat supply technology of the low-pressure cylinder is characterized in that all steam entering of the low-pressure cylinder is cut off under the high-vacuum operation condition of the low-pressure cylinder, only a small amount of cooling steam is introduced, and zero-output operation of the low-pressure cylinder is achieved, so that the heat supply capacity, heat supply economy and electric peak regulation capacity of a unit are improved, and the existing unit cannot stably operate under the output working condition of the low-pressure cylinder.
Disclosure of Invention
The invention aims to provide a low-pressure cylinder zero-output heat supply system which can solve the problem that a unit in the prior art cannot stably run under the working condition of low-pressure cylinder output.
In order to achieve the above purpose, the invention provides the following technical scheme:
a low-pressure cylinder zero-output heating system comprising:
an intermediate pressure cylinder;
the low pressure cylinder is communicated with the intermediate pressure cylinder through a first pipeline and a second pipeline;
the condensate outlet is communicated with the low-pressure cylinder through a third pipeline;
the low-pressure cylinder steam inlet butterfly valve is connected in series with the first pipeline and is provided with a first control end and a first valve core, and the first control end is used for controlling the first valve core to block the first pipeline;
the cooling steam regulating valve is connected to the second pipeline in series, and is provided with a second control end and a second valve core, and the second control end is used for controlling the second valve core to block the second pipeline;
and the low-pressure cylinder water spray regulating valve is connected in series with the third pipeline and is provided with a third control end and a third valve core, and the third control end is used for controlling the third valve core to block the third pipeline.
On the basis of the technical scheme, the invention can be further improved as follows:
further, the low pressure cylinder steam inlet butterfly valve is further used for: when the steam extraction operation mode is adopted, the first control end controls the first valve core to adjust the steam exhaust pressure of the intermediate pressure cylinder;
when the low-pressure cylinder runs with zero output, the first control end controls the first valve core to block the first pipeline.
Further, the cooling steam regulating valve is further configured to: in the steam extraction operation mode, the second control end controls the second valve core to be kept fully opened;
and when the low-pressure cylinder runs with zero output, the second control end controls the second valve core to automatically adjust the flow of the cooling steam introduced into the second pipeline.
Further, the low-pressure cylinder water spray regulating valve is further used for: in the steam extraction operation mode, the third control end controls the third valve element to block the third pipeline;
and when the low-pressure cylinder runs with zero output, the third control end controls the third valve element to adjust the water spraying temperature-reducing flow of the low-pressure cylinder.
Furthermore, the zero-output heating system for the low-pressure cylinder further comprises an alarm module, the alarm module is connected with the first control end, the second control end and the third control end, the first control end, the second control end and the third control end are respectively used for judging whether the working conditions of the first pipeline, the second pipeline and the third pipeline are abnormal or not, if yes, an alarm signal is output, and the alarm module receives the alarm signal and outputs an alarm prompt.
A low-pressure cylinder zero-output heat supply method is used for a low-pressure cylinder zero-output heat supply system, and specifically comprises the following steps:
s101, connecting a low-pressure cylinder steam inlet butterfly valve in series with a first pipeline, and controlling a first valve core to block the first pipeline through a first control end;
s102, connecting the cooling steam regulating valve in series with a second pipeline, and controlling a second valve core to block the second pipeline through a second control end;
and S103, serially connecting the low-pressure cylinder water spray regulating valve to a third pipeline, and controlling a third valve element through a third control end to block the third pipeline.
Further, the S101 specifically includes:
s1011, controlling the first valve core through the first control end to adjust the exhaust steam pressure of the intermediate pressure cylinder in the steam extraction operation mode;
and S1012, when the low-pressure cylinder runs with zero output, controlling a first valve core to block the first pipeline through a first control end.
Further, the S102 specifically includes:
s1021, controlling the second valve core to be fully opened through the second control end in the steam extraction operation mode;
and S1022, when the low-pressure cylinder runs with zero output, controlling the second valve core to automatically adjust the flow of the cooling steam introduced into the second pipeline through the second control end.
Further, the S103 specifically includes:
s1031, controlling the third valve element to block the third pipeline through a third control end when the steam extraction operation mode is adopted;
and S1032, when the low-pressure cylinder runs with zero output, the third valve core is controlled by the third control end to adjust the water spraying temperature-reducing flow of the low-pressure cylinder.
Further, the low-pressure cylinder zero-output heat supply method further comprises the following steps:
s104, respectively judging whether the working conditions of the first pipeline, the second pipeline and the third pipeline are abnormal through a first control end, a second control end and a third control end, and if so, outputting an alarm signal;
and S105, receiving the alarm signal through an alarm module and outputting an alarm prompt.
The invention has the following advantages:
according to the low-pressure cylinder zero-output heat supply system, the low-pressure cylinder steam inlet butterfly valve is connected to the first pipeline in series, and the first pipeline is blocked by the first valve core; connecting the cooling steam regulating valve to a second pipeline in series, and blocking the second pipeline through a second valve core; and the low-pressure cylinder water spray regulating valve is connected in series with the third pipeline and is used for blocking the third pipeline through the third valve core. The operation conditions in the first pipeline, the second pipeline and the third pipeline are adjusted through a low-pressure cylinder steam inlet butterfly valve, a cooling steam adjusting valve and a low-pressure cylinder water spray adjusting valve; the problem of among the prior art unit can't be under the working condition steady operation of low pressure cylinder power is solved.
Drawings
In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present specification, and that other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a schematic diagram of a low-pressure cylinder zero-output heating system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a zero-output heating method for a low-pressure cylinder according to an embodiment of the present invention;
FIG. 3 is a flow chart of a zero-output heating method for a low-pressure cylinder according to an embodiment of the present invention;
fig. 4 is a detailed flowchart of S101;
fig. 5 is a detailed flowchart of S102;
fig. 6 is a detailed flowchart of S103.
The system comprises an intermediate pressure cylinder 10, a low pressure cylinder 20, a first pipeline 30, a second pipeline 40, a third pipeline 50, a condensate outlet 60, a low pressure cylinder steam inlet butterfly valve 70, a cooling steam regulating valve 80 and a low pressure cylinder water spray regulating valve 90.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in one or more embodiments of the present disclosure, the technical solutions in one or more embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in one or more embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all embodiments. All other embodiments that can be derived by a person skilled in the art from one or more of the embodiments described herein without making any inventive step shall fall within the scope of protection of this document.
As shown in fig. 1, a low-pressure cylinder zero-output heating system includes:
an intermediate pressure cylinder 10;
a low pressure cylinder 20 communicating with the intermediate pressure cylinder 10 through a first line 30 and a second line 40;
a condensate outlet 60 in communication with said low pressure cylinder 20 via a third conduit 40;
a low pressure cylinder steam inlet butterfly valve 70 connected in series to the first pipeline 30, the low pressure cylinder steam inlet butterfly valve 70 having a first control end and a first valve core, the first control end being used for controlling the first valve core to block the first pipeline 30;
a cooling vapor regulating valve 80 connected in series to the second pipeline 40, the cooling vapor regulating valve 80 having a second control end and a second valve core, the second control end being used for controlling the second valve core and being used for blocking the second pipeline 40;
and the low-pressure cylinder water spray regulating valve 90 is connected to the third pipeline 40 in series, and the low-pressure cylinder water spray regulating valve 90 is provided with a third control end and a third valve core, wherein the third control end is used for controlling the third valve core and is used for blocking the third pipeline 40.
Through the debugging to this project low pressure cylinder 20 relevant system, make the unit after the transformation can be in low pressure cylinder 20 zero output operating mode steady operation. The zero-output transformation project of the unit low-pressure cylinder 20 is ensured to be smoothly carried out, various protections are put into operation in a planned and stepped manner, and a feasible basis is provided for an installation unit, a production maintenance unit and a debugging unit to jointly complete debugging tasks of related systems of the project on the premise of personal and equipment safety.
On the basis of the technical scheme, the invention can be further improved as follows:
further, the low-pressure cylinder steam inlet butterfly valve 70 is further used for: in the steam extraction operation mode, the first control end controls the first valve core to adjust the steam exhaust pressure of the intermediate pressure cylinder 10; adjusting the exhaust steam pressure of the intermediate pressure cylinder 10 within a specified range;
when the low pressure cylinder 20 operates with zero output, the first control end controls the first valve core to block the first pipeline 30.
Further, the cooling steam regulating valve 80 is further configured to: in the steam extraction operation mode, the second control end controls the second valve core to be kept fully opened;
when the low pressure cylinder 20 runs at zero output, the second control end controls the second valve core to automatically adjust the flow of the cooling steam introduced into the second pipeline 40. The regulation objective is to maintain the low pressure cylinder 20 admission pressure within the designed operating range.
Further, the low-pressure cylinder spray regulating valve 90 is further configured to: in the steam extraction operation mode, the third control end controls the third valve element to block the third pipeline 40;
when the low-pressure cylinder 20 runs with zero output, the third control end controls the third valve element to adjust the water spraying temperature reduction flow of the low-pressure cylinder 20. The adjustment objective is to maintain the final and penultimate stage temperatures of the low pressure cylinder 20 within the design operating range.
Furthermore, the zero-output heating system for the low-pressure cylinder further comprises an alarm module, the alarm module is connected with the first control end, the second control end and the third control end, the first control end, the second control end and the third control end are respectively used for judging whether the working conditions of the first pipeline, the second pipeline and the third pipeline are abnormal or not, if yes, an alarm signal is output, and the alarm module receives the alarm signal and outputs an alarm prompt.
Description of control configuration logic
1.1 valve interlock control logic
1.1.1 Low pressure cylinder steam inlet butterfly valve 70
The low pressure cylinder inlet butterfly valve 70(LV) is interlocked closed to 20%, logic: (OR)
Performing OPC action;
tripping the steam turbine;
the low pressure cylinder inlet butterfly valve 70(LV) is interlocked open to 100% logic:
the middle exhaust pressure is high (the middle exhaust pressure is two, the average is taken), and the fixed value is provided by a host factory;
low pressure cylinder inlet butterfly valve 70(LV) forbid subtract logic (the following 2 conditions are not satisfied)
Heat supply input, and electric load is more than 140 MW;
zero output input, and the electric load is more than 80 MW;
low pressure cylinder inlet butterfly valve 70(LV) increase forbidding logic
Zero force input
Control logic of low-pressure cylinder steam inlet butterfly valve 70(LV) under heat supply working condition
When steam extraction and heat supply are put into use and zero output is not put into use:
hand operated control
Automatic control: pressure control (adjusting the exhaust pressure of the middle pressure cylinder 10)
When steam extraction and heat supply are quitted:
cutting hand
When zero output heat supply is put into use:
the hand is cut.
When zero-output heat supply exits:
no operation
1.1.2 pneumatic check valve for steam extraction
Interlocking closing logic of the steam extraction pneumatic check valve: (OR)
Performing OPC action;
tripping the steam turbine;
the middle exhaust pressure is high (the middle exhaust pressure is two, the average is taken), and the fixed value is provided by a host factory;
steam extraction check valve open permission (or)
Heat supply input, electric load more than 140MW
Zero output input, and the electric load is more than 80 MW;
1.1.3 quick-closing regulating valve for steam extraction
Interlocking closing logic of the steam extraction quick-closing regulating valve: (OR) (simultaneously issuing a quick-closing instruction)
Performing OPC action;
tripping the steam turbine;
the middle exhaust pressure is high (the middle exhaust pressure is two, the average is taken), and the fixed value is provided by a host factory; (ii) a
Steam extraction quick-closing regulating valve open permission (or)
Heat supply input, electric load more than 140MW
Zero output input, and the electric load is more than 80 MW;
control logic for steam extraction quick-closing regulating valve
When steam extraction and heat supply are put into use:
hand operated control
Automatic control: regulating the pressure of heat supply steam extraction
When steam extraction and heat supply are quitted:
cutting hand
When zero output heat supply is put into use:
hand operated control
Automatically controlling and adjusting the exhaust pressure of the intermediate pressure cylinder 10
When zero-output heat supply exits:
cutting hand
Cutting by hand: (either condition is satisfied)
Steam turbine manual control
Operated manually
Heat supply control exit
Zero force exit (pulse)
In the case of zero-output input, the middle exhaust pressure has a dead point or
When zero output is not put into the furnace, the heat supply pressure is out of order
1.1.4 electric butterfly valve for steam extraction
Interlocking closing logic of the steam extraction electric butterfly valve: (OR)
Performing OPC action;
tripping the steam turbine;
the middle exhaust pressure is high (the middle exhaust pressure is two, the average is taken), and the fixed value is provided by a host factory; (ii) a
Electric butterfly valve of steam extraction open permission (or)
Heat supply input, electric load more than 140MW
Zero output input, and the electric load is more than 80 MW;
1.1.5 Cooling steam regulating valve 80
Cooling steam regulator valve 80 interlock closed logic: (OR)
Performing OPC action;
tripping the steam turbine;
the middle exhaust pressure is high (the middle exhaust pressure is two, the average is taken), and the fixed value is provided by a host factory; (ii) a
Cooling steam regulating valve 80 control logic:
when zero output heat supply is put into use:
hand operated control
Automatic control, namely adjusting the flow of the cooling steam to a set value
When zero-output heat supply exits:
cutting hand
Cutting by hand: (either condition is satisfied)
Dead point of inlet pressure of low pressure cylinder 20
Temperature dead center of cooling steam
1.1.6 low pressure cylinder 20 desuperheating water regulating valve
Hand operated control
Automatic control: : the lower value of the saturated temperature +5 ℃ and 60 ℃ corresponding to the steam exhaust pressure of the low-pressure cylinder 20 is used as a set value, and the steam exhaust temperature of the low-pressure cylinder 20 is adjusted. The offset value of the set value can be given manually (newly added)
1.2 Low pressure Cylinder 20 zero Outage control logic description
Zero-output switching logic (newly added logic)
The input is allowed: (and)
The electrical load is more than 80 MW; (tentative, determined by experiment)
Limit value of 20% of minimum opening of butterfly valve 70 for steam admission exiting low pressure cylinder
Automatic excision: (OR)
OPC actions
Steam turbine trip
The middle exhaust pressure is high (the middle exhaust pressure is two, the average is taken), and the fixed value is provided by a host factory;
as shown in fig. 2, a low-pressure cylinder zero-output heating method is used for a low-pressure cylinder zero-output heating system, and the method specifically includes:
s101, blocking a first pipeline through a first valve core;
in this step, the low-pressure cylinder steam inlet butterfly valve 70 is connected in series to the first pipeline 30, and the first valve core is controlled by the first control end to block the first pipeline 30;
s102, blocking a second pipeline through a second valve core;
in this step, the cooling steam regulating valve 80 is connected in series to the second pipeline 40, and the second valve core is controlled by the second control end to block the second pipeline 40;
and S103, blocking the third pipeline through the third valve core.
In this step, the low-pressure cylinder spray regulating valve 90 is connected in series to the third pipeline 40, and the third spool is controlled by the third control end to block the third pipeline 40.
As shown in fig. 4, further, the S101 specifically includes:
s1011, adjusting the exhaust pressure of the intermediate pressure cylinder in the steam extraction operation mode;
in the step, when the steam extraction operation mode is adopted, the first valve core is controlled through the first control end, and the steam exhaust pressure of the intermediate pressure cylinder 10 is adjusted;
and S1012, blocking the first pipeline 30 when the low-pressure cylinder operates with zero output.
In this step, when the low pressure cylinder 20 operates with zero output, the first control end controls the first valve element to block the first pipeline 30.
As shown in fig. 5, further, the S102 specifically includes:
s1021, controlling the second valve core to be fully opened in the steam extraction operation mode;
in the step, the second valve core is controlled to be fully opened by the second control end in the steam extraction operation mode;
s1022, automatically adjusting the flow of cooling steam when the low-pressure cylinder runs with zero output;
in this step, when the low pressure cylinder 20 is operated at zero output, the second valve core is controlled by the second control end to automatically adjust the flow of the cooling steam introduced into the second pipeline 40.
As shown in fig. 6, further, the S103 specifically includes:
s1031, controlling the third valve element to block the third pipeline in the steam extraction operation mode;
in this step, in the steam extraction operation mode, the third valve element is controlled by the third control end to block the third pipeline 40;
s1032, when the low-pressure cylinder runs with zero output, the water spraying temperature reduction flow of the low-pressure cylinder is adjusted.
In this step, when the low pressure cylinder 20 is operated at zero output, the third control end controls the third spool to adjust the water spray desuperheating flow rate of the low pressure cylinder 20.
As shown in fig. 3, the method for supplying heat with zero output of the low-pressure cylinder further includes:
s104, outputting an alarm signal;
in this step, a first control end, a second control end and a third control end are respectively used for judging whether the working conditions of the first pipeline, the second pipeline and the third pipeline are abnormal, and if so, an alarm signal is output;
and S105, the alarm module outputs an alarm prompt.
In this step, the alarm signal is received by the alarm module and an alarm prompt is output.
The exhaust pressure of the intermediate pressure cylinder 10 is high by an I value (a fixed value is provided by a host factory), and an alarm is given; the exhaust pressure of the intermediate pressure cylinder 10 is high by a value II (the fixed value is provided by a host factory), and an alarm is given; the temperature of the penultimate stage is higher than 150 ℃, and an alarm is given; the final-stage temperature is higher than 80 ℃, and an alarm is given; the exhaust temperature is higher than 80 ℃, and an alarm is given; when the low pressure cylinder 20 runs with zero output, the exhaust steam pressure is greater than 8kPa, and an alarm is given (not set);
the low-pressure cylinder zero-output heat supply system is used as follows:
when in use, the low-pressure cylinder steam inlet butterfly valve 70 is connected in series with the first pipeline 30, and the first pipeline 30 is blocked by the first valve core; the cooling steam regulating valve 80 is connected in series to the second pipeline 40, and the second pipeline 40 is blocked by a second valve core; the low-pressure cylinder spray regulating valve 90 is connected in series to the third line 40, and is used for blocking the third line 40 through a third valve core.
It should be noted that the embodiment of the storage medium in this specification and the embodiment of the service providing method based on a block chain in this specification are based on the same inventive concept, and therefore specific implementation of this embodiment may refer to implementation of the service providing method based on a block chain described above, and repeated parts are not described again.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
In the 30 s of the 20 th century, improvements in a technology could clearly be distinguished between improvements in hardware (e.g., improvements in circuit structures such as diodes, transistors, switches, etc.) and improvements in software (improvements in process flow). However, as technology advances, many of today's process flow improvements have been seen as direct improvements in hardware circuit architecture. Designers almost always obtain the corresponding hardware circuit structure by programming an improved method flow into the hardware circuit. Thus, it cannot be said that an improvement in the process flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), is an integrated circuit whose Logic functions are determined by programming the Device by a user. A digital system is "integrated" on a PLD by the designer's own programming without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Furthermore, nowadays, instead of manually making an Integrated Circuit chip, such Programming is often implemented by "logic compiler" software, which is similar to a software compiler used in program development and writing, but the original code before compiling is also written by a specific Programming Language, which is called Hardware Description Language (HDL), and HDL is not only one but many, such as abel (advanced Boolean Expression Language), ahdl (alternate Hardware Description Language), traffic, pl (core universal Programming Language), HDCal (jhdware Description Language), lang, Lola, HDL, laspam, hardward Description Language (vhr Description Language), vhal (Hardware Description Language), and vhigh-Language, which are currently used in most common. It will also be apparent to those skilled in the art that hardware circuitry that implements the logical method flows can be readily obtained by merely slightly programming the method flows into an integrated circuit using the hardware description languages described above.
The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, and an embedded microcontroller, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may thus be considered a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functions of the units may be implemented in the same software and/or hardware or in multiple software and/or hardware when implementing the embodiments of the present description.
One skilled in the art will recognize that one or more embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, one or more embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The description has been presented with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the description. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
One or more embodiments of the present description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. One or more embodiments of the specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of this document and is not intended to limit this document. Various modifications and changes may occur to those skilled in the art from this document. Any modifications, equivalents, improvements, etc. which come within the spirit and principle of the disclosure are intended to be included within the scope of the claims of this document.
Claims (10)
1. A low-pressure cylinder zero-output heating system, comprising:
an intermediate pressure cylinder;
the low pressure cylinder is communicated with the intermediate pressure cylinder through a first pipeline and a second pipeline;
the condensate outlet is communicated with the low-pressure cylinder through a third pipeline;
the low-pressure cylinder steam inlet butterfly valve is connected in series with the first pipeline and is provided with a first control end and a first valve core, and the first control end is used for controlling the first valve core to block the first pipeline;
the cooling steam regulating valve is connected to the second pipeline in series, and is provided with a second control end and a second valve core, and the second control end is used for controlling the second valve core to block the second pipeline;
and the low-pressure cylinder water spray regulating valve is connected in series with the third pipeline and is provided with a third control end and a third valve core, and the third control end is used for controlling the third valve core to block the third pipeline.
2. The low-cylinder zero-output heating system of claim 1, wherein the low-cylinder inlet butterfly valve is further configured to: when the steam extraction operation mode is adopted, the first control end controls the first valve core to adjust the steam exhaust pressure of the intermediate pressure cylinder;
when the low-pressure cylinder runs with zero output, the first control end controls the first valve core to block the first pipeline.
3. The low-cylinder zero-output heating system of claim 1, wherein the cooling steam regulating valve is further configured to: in the steam extraction operation mode, the second control end controls the second valve core to be kept fully opened;
and when the low-pressure cylinder runs with zero output, the second control end controls the second valve core to automatically adjust the flow of the cooling steam introduced into the second pipeline.
4. A low-cylinder zero-output heating system according to claim 1, characterized in that the low-cylinder water spray regulating valve is further adapted to: in the steam extraction operation mode, the third control end controls the third valve element to block the third pipeline;
and when the low-pressure cylinder runs with zero output, the third control end controls the third valve element to adjust the water spraying temperature-reducing flow of the low-pressure cylinder.
5. The low-pressure cylinder zero-output heating system according to claim 1, further comprising an alarm module, wherein the alarm module is connected to the first control end, the second control end and the third control end, the first control end, the second control end and the third control end are respectively used for judging whether the working conditions of the first pipeline, the second pipeline and the third pipeline are abnormal, if yes, an alarm signal is output, and the alarm module receives the alarm signal and outputs an alarm prompt.
6. A low-pressure cylinder zero-output heating method, for use in a low-pressure cylinder zero-output heating system according to any one of claims 1 to 5, the method comprising:
s101, connecting a low-pressure cylinder steam inlet butterfly valve in series with a first pipeline, and controlling a first valve core to block the first pipeline through a first control end;
s102, connecting the cooling steam regulating valve in series with a second pipeline, and controlling a second valve core to block the second pipeline through a second control end;
and S103, serially connecting the low-pressure cylinder water spray regulating valve to a third pipeline, and controlling a third valve element through a third control end to block the third pipeline.
7. The low-pressure cylinder zero-output heating method according to claim 6, wherein the step S101 specifically comprises:
s1011, controlling the first valve core through the first control end to adjust the exhaust steam pressure of the intermediate pressure cylinder in the steam extraction operation mode;
and S1012, when the low-pressure cylinder runs with zero output, controlling a first valve core to block the first pipeline through a first control end.
8. The low-pressure cylinder zero-output heating method according to claim 7, wherein the step S102 specifically includes:
s1021, controlling the second valve core to be fully opened through the second control end in the steam extraction operation mode;
and S1022, when the low-pressure cylinder runs with zero output, controlling the second valve core to automatically adjust the flow of the cooling steam introduced into the second pipeline through the second control end.
9. The low-pressure cylinder zero-output heating method according to claim 8, wherein the step S103 specifically includes:
s1031, controlling the third valve element to block the third pipeline through a third control end when the steam extraction operation mode is adopted;
and S1032, when the low-pressure cylinder runs with zero output, the third valve core is controlled by the third control end to adjust the water spraying temperature-reducing flow of the low-pressure cylinder.
10. The low-pressure cylinder zero-output heating method of claim 9, further comprising:
s104, respectively judging whether the working conditions of the first pipeline, the second pipeline and the third pipeline are abnormal through a first control end, a second control end and a third control end, and if so, outputting an alarm signal;
and S105, receiving the alarm signal through an alarm module and outputting an alarm prompt.
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