With the development of the times, how environmentally friendly, efficient and increasingly urgent to provide heating and hot water put out coal-fired to change the gas will meet the above requirements. West-East of the key national construction projects and gasification project forward, fueled gas-fired boilers, in a few years, many domestic manufacturers competing to research, development of all types for gas-fired boilers. During this period, foreign applications for many years, mature technology, environmental protection, high efficiency gas boilers become the focus of many manufacturers to follow. U.S. National Board of Boiler Company production of modular boilers, especially, a new design concept, excellent technical quality, excellent performance, environmentally friendly and efficient image rapidly large quantities to enter the domestic market, many customers have been widely recognized and highly valued . The modular hot water boiler with the advantage of efficient, durable, reliable, easy to install, flexible, low operation cost, maintenance and ease of operation, environmental effects, no pollution, no noise. Widely used in home heating and hot water, residential district heating and hot water, and industrial and commercial building heating, hot water. Shandong Huayuan Boiler and other traditional boiler, introduced the boiler characteristics: 

A modular design, simple structure, flexible installation and convenient 

The modular concept of the boiler is equivalent to the monomer large boiler split into several small boilers (volume less than 1m3). Therefore we can say that the module boiler by a number of simple parallel combination can reach the size of any single boiler steam tons, so the boiler can replace the common 10 steam tons of all kinds of heating and hot water boiler. The modular design of the boiler to determine the following characteristics: 
    ① Each boiler standby for each other, equipment and investment utilization, run security is greatly enhanced. Once a boiler unexpected failure, the heating is very small, only 1 / N (N is the number of boiler units). 
② capacity expansion performance. With the changing of district heating and heat load of life (steps), may at any time by the increase or decrease the number of boiler units, a smaller investment to meet the heating needs. Unlike single large boiler capacity is difficult to adjust. 
The ③ boiler room infrastructure do not ask, can significantly reduce infrastructure investments. Small module boiler through the ordinary door into the boiler room, the boiler room layout boiler, such as: long and narrow dimensions of the boiler room, the module boiler can also be arranged into a narrow form of. The boiler on the boiler room there are no special requirements, do not need to invest huge sums of money to ferret out based on the construction of the boiler house of brick and concrete structure with high-grade shock tolerance. These characteristics determine the boiler particularly suitable for the reconstruction and expansion project. 
Second, long life, simple maintenance, durable (cast iron boiler design life of up to 50 years) 
   The main reason of the boiler long life is to use the piece of cast iron stove. The monomer boilers most of the steel furnace piece, it is well known, cast iron is much better than the acid and oxygen corrosion of the steel. National standards, the life of the piece of steel furnace for 14 years, while the cast iron stove pad life up to 50 years. Of course, the longevity of the boiler is the operation and management are reasonable and correct operation and routine maintenance well and other factors. Boiler with a set of rigorous scientific operation and management, control systems, and the company will be the operator and technical training to ensure safe operation and correct. 

Third, the control system is perfect, safe and reliable operation 

1 module boilers generally have the following devices to ensure safe use: 
2 module boiler combustion is commonly used atmospheric direct-fired combustion greatly improve the safety of the boiler. 

Fourth, clean, environmentally friendly, low-noise 

The large boiler air and gas mixture into the furnace by the blower, the blower will produce a lot of noise, causing sound pollution, deterioration of the employee work environment. The boiler combustion, atmospheric burners, no blower, so the noise is very low, you will only hear a slight "whirring" sound when burned, without other sounds. The boiler burner they use a special aluminized steel burner materials, aerodynamics technology specifically designed to ensure the efficient combustion of the gas, measured to prove: the combustion efficiency up to 98%. Full combustion to reduce combustion products - nitrogen oxides in the flue gas is low, less pollution.