With the deepening of China’s reform and opening up and the entry of WTO, the international tendering model is becoming more and more popular. In order to meet the requirements of the market, the engineering design model will gradually be integrated with the international design model. For the design of coal-fired power stations, the internationally popular design model now divides the entire power plant into several islands: boiler island, turbine island, instrument control island, and BOP (auxiliary workshop) island. I have designed the thermal control part of the “Hangchang Wenchang Qingyi Gas Turbine Power Plant†in cooperation with “Enron International, Inc.†and collaborated with GECALSTOM of France to design the thermal control part of the “Guangxi Laibin Power Plant (2x360MW)†boiler island and cooperated with ALSTOM of Germany. Designed the thermal control part of the “Waigaoqiao Power Plant (2x900MW)†boiler island, and their design patterns are similar. Now the thermal design features of the “Guangxi Laibin Power Plant†boiler island are taken as an example to introduce to everyone so that the peers can design this popular design. The model has some understanding. 
The 2x360MW unit of Guangxi Laibin Power Plant is a BOT project invested and built by the foreign party in the Chinese power system. It is invested by the French GECALSTOM and EDF, the boiler island is designed by the French ALSTOM, the electric instrument island is designed by the French CGLEC, and the turbine island is designed by the French PPG company. As the design partner of ALSTOM's office in Wuhan, Power Design Institute participated in the design process of the entire boiler island. As a major participant in thermal engineering design, I have some understanding and understanding of some design features and mapping methods of Laibin Power Plant Boiler Island. I will now introduce some experiences to you:
The thermal design of the boiler island includes only the local thermal control part of the boiler island, which generally includes the PLD diagram design and instrument list of the boiler island, the instrument installation details, the local instrument and the gas and electricity user layout, the site, the box, the cabinet, Determine the number and location of boxes and their related checklists, including wiring diagrams for construction sites, boxes, and cabinets (CWD), laying of sampling conduits, laying of heat tracing cables, laying of cables, and a list of related materials. Of course, the design depth and design requirements of each project are different, and the drawings are also different. 
The design of the boiler island thermal engineering of Laibin Power Plant mainly includes:
â—Purchasing technical specification of some instruments
â— Piping and instrumentation diagram
â—Location of instrument taps (Location of instrument taps)
â—Boiler level, electricity user and gas user floor plan (Location of instrumentation and electric and pneumatic consumer)
◠Hook  updrawing for pressure, differential pressure, flow rate, temperature, metal temperature, and analytical instruments
â—Instrument list (Instrument list) 
â— Instrument air user installation detail (Boilerhook-updrawing) and Pneumatic consumer list (Pneumatic consumer list)
â— flue and boiler measuring pipe installation details and equipment list
â— Meter box installation details and equipment list
â— Equipment Material Summary (BOM) etc.
The entire design is based on the design pattern of GESALSTOM in France, and it is translated in both Chinese and English. 
First, the biggest design features of the pipeline instrument flow chart:
1, the entire drawing uses coordinates, the abscissa is 1, 2, 3 ... ... natural number, the ordinate is A, B, C ... ... capital letters. Each system has a unique system number corresponding to it. For example, the system number of boiler steam and water system is FSR, the system number of high-pressure bypass system is FHA, and the connection of processes between different subsystems is clearly indicated by the connector. For example, drawing No. 215/FHAFOO3 (O-7) on the FOO2 (boiler body steam system). Correspondingly, on the drawing FOO3, the connection number 215/FSRFOO2 (B-18) can be found at the coordinates (O-7), indicating that the target number is FOO2, and the system number is FSR (boiler steam system) On the drawings, the coordinates are (B-18). The connector with coordinates can make it easy for people to find your goal in a complicated and connected graph. 
2. The control panel, box, and cabinet supplied with the equipment are all shown on the system diagram and marked with the serial number, purpose, whether it is arranged on site, or is placed in the control room or in the electronic equipment room. Such design is followed up. The design of power supply for the trays, boxes, and cabinets and the layout design of the trays, boxes, and cabinets (including local layout and centralized control room layout) can be done in advance, and are not easy to miss. 
3. Instrument gas source: The design of our gas source for instrument use is usually the laying of a gas source main pipe around the main plant by the maintenance professional. Then the thermal control professional will lay the branch pipeline according to the gas consumption and the distribution of the gas point. Go to the gas object or distribution box. The air distribution boxes are generally located where the air points are relatively concentrated. Each air distribution box supplies 6-8 air supply points. The instrument air source for the boiler island of Laibin Power Plant is divided into the boiler area and the coal bunker area. Four vertical main gas pipelines are laid at the four corners of the boiler, and gas points are supplied to the boilers around the boiler through the branch pipelines (see Figure FO36).†G-pillars in the coal bunker and 17/A, 15/ Four vertical main gas pipelines are laid at the junctions of columns A, 12/D and No. 10, and they are respectively supplied to the gas points between the coal bunkers through branch pipelines.
Second, the measuring point layout:
The task of the site layout is to arrange the measuring points to be installed on site to the process piping and the smoke ducts. The training box is used to indicate the position of the Testtap, and the training circle is used to indicate the sampling tube for measurement. (Measuring and controltap) location, and marked the instrument number, system number and measurement point elevation. According to our design habits, this part of the diagram is usually not used, but the task of determining the installation location of the measuring point in the field is left to the construction personnel, and the foreign design habits usually require the design engineer to determine the location of the measurement point. The task of the construction staff is only based on the drawings. Combined with the installation details and my personal experience, I think that the following points should be noted when making the measurement point layout:
1. For the measurement of the pressure of the upper steam of a horizontal pipeline, the sampling point is required to be installed in the area of ​​160 degrees below the horizontal center line of the pipeline section, but not including the area of ​​30 degrees to the vertical center line of the section. 
2. For the measuring point arrangement of the short pipe for the pressure of the soda water on the horizontal pipe, it is required to be installed in the lower section of the pipe but does not include any position of the 30 degree area around the vertical center line of the section. And it should be convenient for the personnel to approach. 
3, for the flow measurement point layout should pay attention to meet the throttling device before and after the straight pipe requirements. 
4. For the measurement of the differential pressure and flow of the water in the horizontal pipeline, the sampling point is required to be installed below the horizontal center line of the pipeline section. 
Third, the boiler at all levels of instrumentation, electricity users and gas users plane layout (ie local layout):
In the domestic power plant design industry, this part of the drawings can usually not be designed. However, in this internationally popular design pattern, this part of the drawings is a key performance in the thermal design of boiler islands (or turbine islands). Therefore, it is a key scene, not only because of the complexity of the work and the heavy workload, but also because it is indeed more important. This part of the drawings is not only to determine the location, number, and location of junction boxes, insulation boxes, protection boxes, and instrument racks. Including the foundation of the equipment, and also the important basis for the laying of conduits, laying of cables, and laying of gas lines. Based on these drawings, we can easily and accurately list the lengths of cables, sampling ducts, and heating cables. Makes the installation material set close to the actual amount, reducing waste or replenishing orders, but also reduces the workload of construction workers and workers. 
The layout reflects the actual physical location of the instrument, valve, meter box frame, and junction box (including the plane position and floor height), and uses different symbols to indicate the type of measurement point. When doing these drawings, first collect the previous survey layout and the manufacturer's data (such as the information of the boiler plant containing the metal temperature measuring point arrangement, the furnace circulating pump data, etc.) containing the relevant measuring points and valves, and then collect all The three-dimensional coordinates of the measuring point and the valve are found out, and the different types and elevations of the measuring point and the valve are represented by different symbols on the floor plan layout of the stairs of the main building with different elevations. The markings of the measuring points are divided into Testtap (represented by solid squares), Measuring and Controltap (represented by solid circles), Measuring Instruments (local assembly) installed in situ ( Shown by circles containing arrows) Metal Temperature Samples (Metaltemperature) (shown by semi-solid circles) Five. The identification of the valve is divided into two types, an electric consumer and a pneumatic consumer. The identification of the trays, boxes, cabinets, and boxes is divided into three types: junction box for metal temperature, frame for instrument, and other box or cubicle. After the information is marked on the map, the position and number of trays, boxes, cabinets, and boxes can be determined based on the distribution of measurement points. Determine the metal temperature measurement points contained in each junction box according to the model specifications of the junction box, and then make a “metal temperature listâ€. Determine the transmitter and pressure switch included in each box according to the specifications of the protection box and incubator. The quantity is listed in a table. In this figure, the frame number, the drawing No. of tap location, the instrument item number, and the box height can be seen from the table. The position of the box frame on the layout. For example, in the protection box numbered IF127, there are three instruments, namely FRMPT067, FRMPT068 transmitter and FRMPSLL001 pressure switch in the soot blowing system. Their sampling pipes are respectively arranged on the figure number F466 (R-16). ), (R  17), (R  16) Department. The protection box is at the elevation of 57,900mm at (R-17) on the same figure. 
These designs do not seem technically high, but they do require a lot of work. For example, to accurately mark the location of the survey points on the floor plan of the platform stairs, we must first read a wide variety of three-view maps. , but also the conversion of the coordinate system. The determination of some measuring points also has certain technical characteristics. For example, the transmitter for measuring soda water is generally on the platform below the measuring point, and the transmitter for measuring smoke wind is generally placed on the platform above the measuring point. 
Fourth, the installation details (Hook-up):
This part of the drawings is the basis for installation of thermal control equipment by site construction personnel. The types of installation drawings include almost all types of instruments, such as pressure, differential pressure, flow rate, temperature, metal temperature, liquid level, and analytical instruments. 
Fifth, instrument list (Instrumentlist): 
The list of instruments is divided into categories such as pressure, differential pressure, flow rate, temperature, metal temperature, liquid level, and analytical instruments according to the type of instrument. They are the basis for material summarization. The instrument list contains a lot of information, including the instrument number, instrument installation position, measurement range, installation detail drawing number, sampling stub local layout drawing number, instrument local layout drawing number, protection box (insulation box) or junction box Number and so on. The schedule is a list of metal temperatures. 
Other features are not introduced here one by one. By participating in the design of these projects, my personal experience is that each step of the foreigner's design is very detailed. This is where we can learn from.
The 2x360MW unit of Guangxi Laibin Power Plant is a BOT project invested and built by the foreign party in the Chinese power system. It is invested by the French GECALSTOM and EDF, the boiler island is designed by the French ALSTOM, the electric instrument island is designed by the French CGLEC, and the turbine island is designed by the French PPG company. As the design partner of ALSTOM's office in Wuhan, Power Design Institute participated in the design process of the entire boiler island. As a major participant in thermal engineering design, I have some understanding and understanding of some design features and mapping methods of Laibin Power Plant Boiler Island. I will now introduce some experiences to you:
The thermal design of the boiler island includes only the local thermal control part of the boiler island, which generally includes the PLD diagram design and instrument list of the boiler island, the instrument installation details, the local instrument and the gas and electricity user layout, the site, the box, the cabinet, Determine the number and location of boxes and their related checklists, including wiring diagrams for construction sites, boxes, and cabinets (CWD), laying of sampling conduits, laying of heat tracing cables, laying of cables, and a list of related materials. Of course, the design depth and design requirements of each project are different, and the drawings are also different. 
The design of the boiler island thermal engineering of Laibin Power Plant mainly includes:
â—Purchasing technical specification of some instruments
â— Piping and instrumentation diagram
â—Location of instrument taps (Location of instrument taps)
â—Boiler level, electricity user and gas user floor plan (Location of instrumentation and electric and pneumatic consumer)
◠Hook  updrawing for pressure, differential pressure, flow rate, temperature, metal temperature, and analytical instruments
â—Instrument list (Instrument list) 
â— Instrument air user installation detail (Boilerhook-updrawing) and Pneumatic consumer list (Pneumatic consumer list)
â— flue and boiler measuring pipe installation details and equipment list
â— Meter box installation details and equipment list
â— Equipment Material Summary (BOM) etc.
The entire design is based on the design pattern of GESALSTOM in France, and it is translated in both Chinese and English. 
First, the biggest design features of the pipeline instrument flow chart:
1, the entire drawing uses coordinates, the abscissa is 1, 2, 3 ... ... natural number, the ordinate is A, B, C ... ... capital letters. Each system has a unique system number corresponding to it. For example, the system number of boiler steam and water system is FSR, the system number of high-pressure bypass system is FHA, and the connection of processes between different subsystems is clearly indicated by the connector. For example, drawing No. 215/FHAFOO3 (O-7) on the FOO2 (boiler body steam system). Correspondingly, on the drawing FOO3, the connection number 215/FSRFOO2 (B-18) can be found at the coordinates (O-7), indicating that the target number is FOO2, and the system number is FSR (boiler steam system) On the drawings, the coordinates are (B-18). The connector with coordinates can make it easy for people to find your goal in a complicated and connected graph. 
2. The control panel, box, and cabinet supplied with the equipment are all shown on the system diagram and marked with the serial number, purpose, whether it is arranged on site, or is placed in the control room or in the electronic equipment room. Such design is followed up. The design of power supply for the trays, boxes, and cabinets and the layout design of the trays, boxes, and cabinets (including local layout and centralized control room layout) can be done in advance, and are not easy to miss. 
3. Instrument gas source: The design of our gas source for instrument use is usually the laying of a gas source main pipe around the main plant by the maintenance professional. Then the thermal control professional will lay the branch pipeline according to the gas consumption and the distribution of the gas point. Go to the gas object or distribution box. The air distribution boxes are generally located where the air points are relatively concentrated. Each air distribution box supplies 6-8 air supply points. The instrument air source for the boiler island of Laibin Power Plant is divided into the boiler area and the coal bunker area. Four vertical main gas pipelines are laid at the four corners of the boiler, and gas points are supplied to the boilers around the boiler through the branch pipelines (see Figure FO36).†G-pillars in the coal bunker and 17/A, 15/ Four vertical main gas pipelines are laid at the junctions of columns A, 12/D and No. 10, and they are respectively supplied to the gas points between the coal bunkers through branch pipelines.
Second, the measuring point layout:
The task of the site layout is to arrange the measuring points to be installed on site to the process piping and the smoke ducts. The training box is used to indicate the position of the Testtap, and the training circle is used to indicate the sampling tube for measurement. (Measuring and controltap) location, and marked the instrument number, system number and measurement point elevation. According to our design habits, this part of the diagram is usually not used, but the task of determining the installation location of the measuring point in the field is left to the construction personnel, and the foreign design habits usually require the design engineer to determine the location of the measurement point. The task of the construction staff is only based on the drawings. Combined with the installation details and my personal experience, I think that the following points should be noted when making the measurement point layout:
1. For the measurement of the pressure of the upper steam of a horizontal pipeline, the sampling point is required to be installed in the area of ​​160 degrees below the horizontal center line of the pipeline section, but not including the area of ​​30 degrees to the vertical center line of the section. 
2. For the measuring point arrangement of the short pipe for the pressure of the soda water on the horizontal pipe, it is required to be installed in the lower section of the pipe but does not include any position of the 30 degree area around the vertical center line of the section. And it should be convenient for the personnel to approach. 
3, for the flow measurement point layout should pay attention to meet the throttling device before and after the straight pipe requirements. 
4. For the measurement of the differential pressure and flow of the water in the horizontal pipeline, the sampling point is required to be installed below the horizontal center line of the pipeline section. 
Third, the boiler at all levels of instrumentation, electricity users and gas users plane layout (ie local layout):
In the domestic power plant design industry, this part of the drawings can usually not be designed. However, in this internationally popular design pattern, this part of the drawings is a key performance in the thermal design of boiler islands (or turbine islands). Therefore, it is a key scene, not only because of the complexity of the work and the heavy workload, but also because it is indeed more important. This part of the drawings is not only to determine the location, number, and location of junction boxes, insulation boxes, protection boxes, and instrument racks. Including the foundation of the equipment, and also the important basis for the laying of conduits, laying of cables, and laying of gas lines. Based on these drawings, we can easily and accurately list the lengths of cables, sampling ducts, and heating cables. Makes the installation material set close to the actual amount, reducing waste or replenishing orders, but also reduces the workload of construction workers and workers. 
The layout reflects the actual physical location of the instrument, valve, meter box frame, and junction box (including the plane position and floor height), and uses different symbols to indicate the type of measurement point. When doing these drawings, first collect the previous survey layout and the manufacturer's data (such as the information of the boiler plant containing the metal temperature measuring point arrangement, the furnace circulating pump data, etc.) containing the relevant measuring points and valves, and then collect all The three-dimensional coordinates of the measuring point and the valve are found out, and the different types and elevations of the measuring point and the valve are represented by different symbols on the floor plan layout of the stairs of the main building with different elevations. The markings of the measuring points are divided into Testtap (represented by solid squares), Measuring and Controltap (represented by solid circles), Measuring Instruments (local assembly) installed in situ ( Shown by circles containing arrows) Metal Temperature Samples (Metaltemperature) (shown by semi-solid circles) Five. The identification of the valve is divided into two types, an electric consumer and a pneumatic consumer. The identification of the trays, boxes, cabinets, and boxes is divided into three types: junction box for metal temperature, frame for instrument, and other box or cubicle. After the information is marked on the map, the position and number of trays, boxes, cabinets, and boxes can be determined based on the distribution of measurement points. Determine the metal temperature measurement points contained in each junction box according to the model specifications of the junction box, and then make a “metal temperature listâ€. Determine the transmitter and pressure switch included in each box according to the specifications of the protection box and incubator. The quantity is listed in a table. In this figure, the frame number, the drawing No. of tap location, the instrument item number, and the box height can be seen from the table. The position of the box frame on the layout. For example, in the protection box numbered IF127, there are three instruments, namely FRMPT067, FRMPT068 transmitter and FRMPSLL001 pressure switch in the soot blowing system. Their sampling pipes are respectively arranged on the figure number F466 (R-16). ), (R  17), (R  16) Department. The protection box is at the elevation of 57,900mm at (R-17) on the same figure. 
These designs do not seem technically high, but they do require a lot of work. For example, to accurately mark the location of the survey points on the floor plan of the platform stairs, we must first read a wide variety of three-view maps. , but also the conversion of the coordinate system. The determination of some measuring points also has certain technical characteristics. For example, the transmitter for measuring soda water is generally on the platform below the measuring point, and the transmitter for measuring smoke wind is generally placed on the platform above the measuring point. 
Fourth, the installation details (Hook-up):
This part of the drawings is the basis for installation of thermal control equipment by site construction personnel. The types of installation drawings include almost all types of instruments, such as pressure, differential pressure, flow rate, temperature, metal temperature, liquid level, and analytical instruments. 
Fifth, instrument list (Instrumentlist): 
The list of instruments is divided into categories such as pressure, differential pressure, flow rate, temperature, metal temperature, liquid level, and analytical instruments according to the type of instrument. They are the basis for material summarization. The instrument list contains a lot of information, including the instrument number, instrument installation position, measurement range, installation detail drawing number, sampling stub local layout drawing number, instrument local layout drawing number, protection box (insulation box) or junction box Number and so on. The schedule is a list of metal temperatures. 
Other features are not introduced here one by one. By participating in the design of these projects, my personal experience is that each step of the foreigner's design is very detailed. This is where we can learn from.
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