Gas boiler: Structure and characteristic of the heat exchanger unit: supply and return sides of the differential pressure control, pressure control backwater sides, heat exchange device temperature control of Xinjiang, electronically controlled valve controls the flow of the main network, the two network outlet maintaining the set temperature. using a temperature controlled flow control valve controls the primary network, two networks to maintain the set temperature of the outlet. two web exit temperature is automatically adjusted outdoor temperature.

First, the exhaust gas temperature decreases, the boiler flue gas heat loss is also reduced. Since the heat loss is the main gas boiler heat loss, thus reducing heat loss from the boiler efficiency will increase.

Recently, Shaanxi Province, issued a "Boiler Air Pollutants Emission Standards" ( "Standards"), the "standard" in the concentration of air pollutants emission limits thermal power boilers and industrial boilers, we have developed a monitoring requirements.

Thermal power generation boilers including boilers of various capacities and various gas turbine capacity, fuel main types of coal, natural gas, oil, biomass, like other gas. Use gangue, oil shale, petroleum coke, fuel, sludge and other coal-fired power boilers reference emission limits fired boilers performed.

Industrial boilers including industrial boilers, various types of fuel capacity mainly coal, gas, oil, biomass, and so on. Boilers using coal, coal water slurry, coal waste, semi-coke, petroleum coke, oil shale and other fuel fired boilers performed with reference to emission limits. Using alcohol fuel (e.g., methanol, ethanol, dimethyl ether, etc.) with reference to the boiler exhaust gas boiler limits performed. Oil and gas dual-fuel boiler in accordance with the type of execution are oil-fired boiler and gas boiler emission standards. Other types of fuel mixed fuel boilers by performing more stringent emission standards.

On the whole, lower consumption of coal-fired boilers, but there are environmental risks, many new coal-fired boilers enterprises are also faced with the situation of environmental transformation or replacement, post huge investment costs.