The gas fired steam boiler adopts mechatronics control equipment and programmable logic controller (PLC) combined control mode. Advanced programmable logic controller (PLC) for the control system of the “central processor”. The control system is operated by touch screen, so that the degree of automatic control and operation reliability of the boiler is greatly improved, and the operation is more simple and intuitive. The gas boiler thermal efficiency adopts advanced technology of pre-expansion and then full welding, and then expansion, which not only prevents the corrosion of pipe gap, but also enhances the welding strength. The screw pipe with high heat transfer coefficient is used to strengthen the heat transfer effect of convection, reduce the exhaust temperature and improve the thermal efficiency of the boiler.
The gas-fired boiler adopts scientific product design, advanced processing technology and strict quality control. All the boiler equipment produced by our factory has a continuous operating life of more than 10 years. The radiant heating surface of the boiler is full corrugated furnace, and the convection heating surface adopts threaded smoke pipe. The heating surface is large, and the heat output of the boiler is sufficient and the thermal efficiency can reach more than 95%, which is higher than the national regulations. The structure type of this series of boiler products is mostly horizontal internal combustion boiler (WNS type), boiler thermal efficiency between 95-98%. The thermal efficiency of gas fired boiler is mainly determined by the heat loss of exhaust gas, chemical incomplete combustion heat loss, mechanical incomplete combustion heat loss and heat dissipation loss.
Gas boiler thermal efficiency high. In all the heat losses, the heat loss of exhaust smoke occupies a large proportion. In order to improve the utilization efficiency of energy, it is necessary to reduce the exhaust heat loss of the boiler, and the amount of exhaust heat loss is mainly related to the exhaust temperature. Previous studies have shown that the thermal efficiency of gas-fired boilers will increase by about 1% for every 15℃ decrease in exhaust temperature. Due to technical and economic cost restrictions, in the traditional steam boiler, exhaust temperature is often higher. Gain more energy to make boiler, typically increase in the lining of the boiler heating surface, to absorb heat with larger area, so inevitably cause increased boiler size, covers an area of large listed some shortcomings, such as in combination with other factors, only from the increasing heated area of the factors to consider, not enhance the thermal efficiency of boiler.
With the progress of technology, some of the more advanced technology is used to solve the problem of heat transfer, such as the selection of thermal conductive performance more good material, improve the internal structure and so on, which makes the new boiler overcomes the drawback of the boiler heat transfer performance is poor, thus reduce exhaust temperature, at the same time of gas boiler structure is more compact, easy to put. Now the structural design of the furnace has been greatly improved, from the flat smooth furnace before the development of the corrugated furnace, the application of the corrugated furnace on the one hand reduces the thermal stress concentration problem of the furnace after heating, can prolong the service life and service time of the boiler, at the same time, the heating area increases, improve the thermal efficiency. There is also the optimal design of the smoke pipe, the use of spiral structure, when there is gas flow through, resulting in the disturbance of flue gas, so that the heat transfer coefficient can be increased by more than 50%.
The calculation of gas consumption of gas-fired boiler should be clear about the thermal efficiency value of the gas-fired boiler. The high thermal efficiency value of the boiler will reduce the gas consumption, and vice versa. Calculation formula of gas consumption per hour of gas fired steam boiler: Boiler thermal power unit is “MW”, 0.7MW is equivalent to 1t/h to 10t/h in the production of gas-fired boiler, for example, if the calorific value of natural gas is 36MJ/m³, the design efficiency is calculated by 98%, Then the gas volume required for 1 hour of operation of a 10-ton natural gas boiler =7MW*3600s/36MJ/ NM ³/98%= 714M ³/h Note: In actual operation of boilers, the operating load is different, the pressure is different, and the operation mode of the stowman is different, so the gas consumption of the boiler can not be generalized.
The gas boiler thermal efficiency is the main technical and economic index of boiler technology level. It indicates the technical advanced degree of boiler equipment and the level of energy efficiency. The design efficiency of gas-fired boilers is generally about 80%~8%, and the design efficiency of gas-fired boilers can reach 90% ~ 98%. The thermal efficiency of boilers can be obtained by the positive balance method or by the counterbalance method. Zozen Boilers specialize in producing various types of boiler products, we have established friendly and cooperative relationship with many users for many years, welcome all users to come to our factory for consultation and purchase!