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There are mainly the following boiler starting methods:
1.Manual start:That is, through the manual operation of the control system, each part of the boiler is gradually started to complete the whole start-up process.
2.Auto-start:That is, through the automatic control system, the start-up process of the boiler is automatically completed according to the preset program. The automatic start mode can greatly improve the start-up efficiency and reduce the cumbersome and error of manual operation.
3.Remote Start:That is, through the remote control system, the boiler is started remotely. This method is suitable for occasions that require remote monitoring and control, such as centralized control of multiple boilers by a remote monitoring center.
4.Hot start:That is, the start-up is carried out when the boiler is in a hot state. This method is suitable for occasions where the boiler needs to be started and stopped frequently, such as the boiler in the summer air conditioning system.
5.Cold start:That is, the start-up is carried out when the boiler is in a cold state. This method is suitable for situations where a restart is required after a long shutdown, such as a boiler that shuts down seasonally.
The above is the main classification of boiler starting methods, different starting methods are suitable for different occasions, and choosing the right starting method can improve the efficiency and safety of the boiler.
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Before the bottom steam is heated, the drain in the steam source pipe should be exhausted before it is put into use. At the initial stage of use, the valve should be slightly opened to prevent excessive vibration, and then gradually opened and fully opened according to the heating situation. In the process of commissioning, attention should be paid to the pressure of the steam source and the steam drum of the furnace to be heated.
The difference of pressure, especially after the boiler is ignited and pressurized, should pay attention to its difference shall not be lower, if it reaches this value, it should be solved in time to prevent the boiler water from pouring into the standby steam source mother tube.
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According to the state of the device before starting, it can be divided into cold start and hot start. Hot start refers to the start of the boiler when there is still a certain pressure and temperature, and the high-pressure inner and lower cylinder wall temperature of the steam turbine is above 150. The cold start generally refers to the start when the boiler drum pressure is zero and the cylinder wall temperature of the steam turbine is below 150 at high pressure.
According to the steam turbine impulse parameters, it can be divided into three modes: rated parameters, medium parameters and slip parameters. Both the rated and medium parameters start the boiler first, and the steam parameters reach the rated or medium parameters before the steam turbine is started. At present, this method is rarely used in high-parameter, high-capacity boilers (with the exception of the hot state).
Slip parameter start-up can be divided into vacuum method and pressure method, that is, the steam turbine starts at the same time as the boiler is started or when the steam parameters are very low.
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Summary. Hello, the boiler system consists of: oil system - milling system - air smoke system - steam system.
In general, it is divided into furnace safety protection system, boiler sequence control system, furnace safety and fuel oil system, milling system, etc.
Extended information: The boiler body is composed of the following main parts: 1. "Pot" includes steam drum, casing, descending pipe, water wall tube, etc.
Their role is to heat water into saturated steam. 2. "Furnace" (combustion equipment) includes combustion chamber (furnace), burner, grate, etc. Their role is to provide a place and good conditions for fuel combustion.
The gas hot water boiler is equipped with a microcomputer controller and an imported burner, and the hot water in the automatic circulating boiler and heating pipeline is used to achieve the purpose of heating, or the hot water of the heating and insulation tank is used to achieve the bathing requirements, and the gas hot water boiler is widely used in enterprises, enterprises, factories, hospitals, schools, hotels, hotels and other enterprises and institutions.
How many systems does a boiler consist of?
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Hello, the boiler system consists of: oil system - milling system - air smoke system - steam system. In general, it is divided into furnace safety protection system, boiler sequence control system, furnace safety and fuel oil system, milling system, etc.
Extended information: The boiler body is composed of the following main parts: 1. "Pot" includes steam drum, casing, descending pipe, water wall tube, etc.
Their role is to heat water into saturated steam. 2. "Furnace" (combustion equipment) includes combustion chamber (furnace), burner, grate, etc. Their role is to provide a place and good conditions for fuel combustion.
The gas hot water boiler is equipped with a microcomputer controller and an imported burner, and the hot water in the automatic circulating boiler and heating pipeline is used to achieve the purpose of heating, or the hot water of the heating and insulation tank is used to achieve the bathing requirements, and the gas hot water boiler is widely used in enterprises, enterprises, factories, hospitals, schools, hotels, hotels and other enterprises and institutions.
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Answer] :(1) According to the state of the boiler, the starting mode is divided into cold start, warm start, and hot start-up nuclear action;
2) According to the changing condition of the boiler parameters, the starting mode is divided into rated parameter start, variable pressure start (slip parameter start).
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The boiler external starting system is mainly composed of the following equipment:
1. Starter.
The starter is one of the core devices of the external starting system. It usually consists of an electric motor, a reducer, and a transmission. The function of the starter is to provide the power required for the start-up process, and transmit the power to the main components of the boiler through the transmission device, such as fans, feed pumps, etc.
Depending on the size and needs of the boiler, the type and size of the starter will vary.
2. Electrical control cabinet.
The electrical control cabinet is the key equipment that controls the operation of the starter. It includes various control elements such as switches, fuses, base relays, etc., as well as instrumentation and sensors required for electrical control systems. The function of the electrical control cabinet is to receive signals from the operator or automatic control system, and to control the start and stop of the starter and the operating status of related equipment.
3. Boiler accessories.
The external starting system also needs to be connected and coordinated with the accessories of the boiler itself to ensure the smooth operation of the entire start-up process. These accessories include fans, feed pumps, burners, etc. The starter transmits power to these accessories through the transmission, so that they can operate normally and meet the starting conditions of the boiler.
4. Lubrication system.
Since the operation of the starter requires lubricating oil to ensure its normal operation, the lubrication system is one of the indispensable equipment in the external starting system. The lubrication system mainly includes oil tank, oil pump, oil filter and lubricating oil pipeline. Its role is to deliver lubricating oil to the critical parts of the starter to reduce friction and wear, and extend the life of the equipment.
5. Auxiliary facilities.
External starter systems may also require additional auxiliary flammation facilities, such as cooling water systems, air compressors, etc. The purpose of these facilities is to provide the starters and other equipment with the necessary cooling, cleaning, or auxiliary air supply to ensure the reliability and safety of the entire start-up process.
It is necessary to select the appropriate external starting system according to the specific boiler type and size, and ensure that the performance and quality of its equipment and accessories meet the relevant standards and specifications. At the same time, in the process of installation and maintenance, it is necessary to follow the relevant operating procedures, regularly inspect and maintain the system equipment to ensure its normal operation and prolong the service life.
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Answer]: c, d, hidden Zen e
This question is about the basic knowledge of special equipment. According to the combustion mode, it is divided into layer combustion furnace, chamber furnace, cyclone furnace and fluidized bed combustion boiler.
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