The gas-fired hot water boiler is equipped with a microcomputer controller and imported burners. The hot water circulating pump is used for the automatic circulation boiler and the hot water in the heating pipe to complete the heating purpose, or the hot water of the heat preservation water tank is used to complete the bathing requirements. The gas hot water boiler is widely applicable Used in government agencies, enterprises, factories, hospitals, schools, hotels, hotels and other enterprises and institutions.
The electrical control of the burner of the water heater is mainly to control the working procedures of each component, and this mission is completed by the program controller. There are two types of program controllers: electronic and mechanical. The models of the program controllers used by various types of burners vary greatly in standard, but the overall functions and principles are basically similar.
Article 167 of the 96th edition of the "Steam Boiler Safety Technical Supervision Regulations" issued by the Ministry of Labor stipulates the ventilation time of the burner. Now some program controllers cannot meet the specified requirements, so this aspect should be mentioned when ordering. Requirements. The electrical control of the burner of the oil-fired water heater mainly consists of the power supply circuit of the injection motor, the solenoid valve circuit, the incineration circuit, the photosensitive circuit and the servo motor circuit. Its working principle is divided into the following five aspects.
1. Throttle reset circuit.
2. Main motor circuit.
3. Incineration circuit.
4. Photosensitive circuit.
5. Solenoid valve and servo motor circuit.
The structure of the gas-fired hot water boiler is usually a shell-type three-pass, fully wet back structure. All pressure components are symmetrical to the center of the drum, and the boiler adopts a fully wet back structure. With the structure of a large inner tube and an eccentric fire box, it is conducive to expansion of sufficient radiant heating surface. The convective heating surface is composed of a second-pass and three-pass tube bundle. The front tube plate of the back-combustion chamber is selected to be connected with the furnace bladder, and the back tube plate of the back-combustion chamber is selected from an ellipsoidal head and a tube plate. The turning smoke chamber on the second return and the third return constitutes the front smoke box, and the temperature of the smoke is lower than 500°C. Therefore, the structure of the front smoke box is made of refractory and heat-insulating materials with a lightweight structure.