Gas and oil boiler refers to a boiler that can burn both oil and gas. Only oil-fired boilers are called oil-fired boilers, and only gas-fired boilers are called gas-fired boilers. If the boiler is equipped with a dual-fuel burner, it is an oil-fired boiler. Gas and oil boiler is a general concept. Gas and oil boiler is mainly divided into boiling water boiler, hot water boiler, steam boiler and heat-conducting oil boiler. When purchasing, you should choose different boilers according to your own use. Gas and oil boiler is different from coal-fired boiler. It needs a burner to inject fuel into the boiler hearth, and it uses a fire chamber to burn without using grate facilities. As fuel ash is not produced after combustion of gas and oil boilers, there is no need for slag discharge facilities for oil-fired gas boilers. If the oil and gas injected into the furnace are mixed or extinguished with air within a certain range, it is easy to explode. Therefore, all oil-fired and gas-fired boilers need to adopt automatic combustion and control systems. The gas and oil boiler has a compact structure. The small boiler body and its ventilation, water supply, control and auxiliary equipment are all set on a distribution box. Large and medium-sized boilers can also be assembled and delivered from the factory.
Product thermal capacity: 20-130 t/h
Working pressure: 3.82, 5.29 MPa
Product thermal capacity: 2-110 t/h
Working pressure: 1.25-5.3 MPa
Product thermal capacity: 1-20 t/h
Working pressure: 0.7-2 MPa
Product thermal capacity: 7-116 MW
Working pressure: 1-1.6 MPa
Oil
Fuel oil is a liquid fuel, and its boiling point is always lower than the ignition point, so the combustion of fuel oil always takes place in the gaseous state. After the atomized oil particles are sprayed into the furnace, the fuel is heated by the high-temperature flue gas in the furnace for gasification. The gasified oil and gas meet the oxygen in the surrounding air to form a flame. Part of the heat generated by the combustion is transferred to the oil particles, so that the oil particles continue to gasify and burn until they burn. The smaller the diameter of the oil particles, the faster the oil particles burn. Similarly, the oxygen required for the combustion of oil particles can be supplied in time, and the combustion of oil particles will be faster. Therefore, in order to enhance the combustion of oil, the following must be done:
1. Improve atomization quality and reduce oil particle diameter;
2. Increase the relative speed of air and oil particles;
3. Reasonable air distribution.
Gas
Burning gas with high calorific value requires a large amount of air. In order to fully burn the gas, a large amount of air needs to be mixed with it. The combustion process of gas does not have the atomization process and gasification process of fuel oil. The mixing method of gas and air has a great influence on the intensity of combustion, flame length and flame temperature.
Gas and oil boilers are different from coal-fired boilers in that they require a burner to inject fuel into the boiler hearth, and use a fire chamber to burn without using a grate facility. Since no fuel ash is produced after the combustion of the gas and oil boiler, it does not need a slag discharge facility. If the oil and gas injected into the furnace is mixed with air within a certain range or extinguished, it is easy to explode. Therefore, gas and oil boilers need to use automated combustion and control systems. The oil-fired and gas-fired boiler has a compact structure. The small boiler body and its ventilation, water supply, control and auxiliary equipment are all set on a chassis, and the large and medium-sized ones can also be assembled and shipped. The main pressure components and connection methods of the oil-fired gas boiler are described as follows:
1. The main pressure components of fire tube boilers: shell, tube sheet, furnace gall, smoke pipe;
2. The main pressure components of the water tube boiler: drum (drum), water wall, boiler tube bundle, serpentine tube, header;
3. The connection method of the main pressure components of the oil-fired gas boiler: mainly welding, and some can also be expanded.
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