A: Commercial current commercial gas boiler main use is for supermarkets, hospitals, schools, hotels, residential (mainly the center of the city, convenient gas facilities area), bath, etc., to provide heating or bathing water, hot water. Since the gas in the ash, low sulfur and nitrogen than coal combustion, very small amount of dust in the flue gas, the state emission standards easy to achieve the required gas appliance, it can greatly reduce the pollution of the environment, environmental performance it is good. Boilers and combustion gas on the accessory device does not require gas, slag, dust removal machines, etc. grate, boiler investment saving equipment, is therefore suitable for commercial applications. Two: with factory workers using direct gas boiler piped gas powered, no gas storage, health conditions, can greatly reduce labor intensity and improve working conditions and reduce the operating cost, operating cost savings, space and labor . Since the smoke pollution, convection bank bear little corrosion, heat transfer effect, strong radiation heat, exhaust gas temperature is low, the thermal efficiency is significantly improved, so the main industrial gas boiler for power generation, industrial gas boilers of gas used may be generally natural gas, blast furnace gas, producer gas and so on. Three: Civil domestic gas boilers (boiler) is mainly used for daily household hot water, bath and hot water heating. In reducing equipment maintenance, gas burning boilers coefficient simple equipment, thus requiring less maintenance equipment maintenance, long life heated tube, gas boiler is simple to operate and easy to achieve automatic control.

Coal-fired boilers to gas-fired boiler and the basic requirements of a program, the transformation of the basic requirements: 1, the boiler must be carried out in accordance with "Steam Boiler Safety Technology Supervision" and "Hot Water Boiler Safety Technology Supervision" and relevant national technical regulations, construction program should be sent to the local technical supervision departments for approval. 2, to determine the value in use based on the transformation of the boiler has the age and state of the art, taking into account the life expectancy of the boiler. If the boiler use a longer useful life, and the pressure there is a serious corrosion, scaling and overheating phenomena such elements, no transformation of value. 3, boiler walls, chimneys, water supply and air supply, the wind system should remain largely intact. 4, after the transformation of the original technical parameters should be kept constant boiler (operating pressure, temperature, etc.) or the load and to improve the efficiency of the original boiler. 5, after the boiler should comply with national environmental and technical indicators, solve the problem of smoke and dust, meet environmental requirements. 6, when the boiler should try not to change the original pot, and the body is pressed by the original system architecture, covers the smaller the better. 7, rehabilitation programs should be simple, low investment, short construction period and quick, safe and reliable. Second, the transformation method: 1, removal of the original coal-fired boiler slag machine, equipment on coal, dust, chain grate and gearbox. 2, according to the diameter and length of the flame, furnace installation height determining geometric dimensions and the burner. 3, making the furnace, the furnace bottom refractory brick, a semicircular shape. 4, the front arch openings mounted burner nozzle. 5, after that the flame away from the center position of the tube the arch, the arch of the pipe on the basis of the original slope, heightening baffle wall, the protective tube arch. 6, install blast doors. 7, install the induced draft fan drive. 8, the body of the boiler water test pressure 1.5 times the working pressure. 9, the automatic control system installed. Third, the technical proposal: 1, furnace design should consider the flame length and diameter of the flame of the combustion gas, so that the furnace space is filled with the best of the flame, the flame not Wall flush. 2, as the main component of natural gas CH4, H20 generated after combustion, steam share large, so that strong radiation, heating furnace suitably increased to take advantage of the radiation heat transfer, thermal efficiency, reduce the consumption of steel, ensure that the boiler output, and may increase the boiler output. 3, a slight positive pressure within the boiler furnace using a combustion or slightly negative pressure, the sealing performance of the boiler furnace walls to strengthen, not air leakage. 4, due to the smaller excess air ratio of the gas boiler, combustion requires less air flow, coupled with the removal of dust, dust and small flue system, the flue resistance is reduced, a large surplus primer fan flow, using file when the damper plate adjusting the power loss is large, frequency control can be induced draft fan air volume regulation. 5, after the furnace door and see the fire smoke chamber above the chimney, mounted two proof doors, in order to improve the antiknock performance of the boiler. 6, the boiler flue gas the volume of gas in the vapor component is generally 15% to 19%, well above the coal-fired boiler flue gases generated in the water vapor content of 6% by volume or less. Boiler shutdown and startup, due to the low wall temperature of the boiler heating element, when less than less 50 ℃, the flue gas water vapor dew condensation on the wall will, if not removed condensate with the condensate of the contact wall would be C02 acid gas corrosion of furnace wall and the insulation material due to water absorption and thermal insulation effect will be lost. Therefore, before and after the gas water tube double drums coal fired hot water boiler smoke box and the rear box and the rear flue smoke condensate discharge means to be provided, promptly boiler condensate removal. 7, the gas boiler-system control function should have combustion process. Pre-blowing may be implemented, auto-ignition, flame detector self-test, automatic load adjustment, flame monitoring, fault alarm interlock shutdown, the gas leak detection valve, induced draft fan and burner control sequential chain protection. 8, in order to prevent fluctuations in the gas pressure regulator to meet the burner requirements, the installation of a gas regulator metering panel outer gas inlet in the boiler room, the surge counter can be accomplished by filtration, regulating, metering, safety shut-off functions.

At the same time the 58MW circulating fluidized bed water tube double drums coal fired hot water boiler has good fuel adaptability, not only with the bituminous coal, lignite and other flammable combustible coal, also can use anthracite coal, can also burn bark, garbage and other biomass fuels, the heating company to buy fuel way is broad.

It is reported that in the phase-out of coal-fired boiler reconstruction project, Jinan City, Shandong Province Finance Bureau has appropriated out of the transformation of coal-fired boilers municipal county area of ​​awards and subsidies 310 million yuan for the enterprises, units out of coal-fired boilers and special awards subsidy.

The allocation of financial awards complement funds, aims to accelerate the transformation of the city's coal-fired boilers out of work, to further improve air quality, according to the municipal government office "on accelerating the transformation of the city's coal-fired boilers out of work notice" (Ji Zheng Ban word [2017] 4) the requirements of the embodiment.

According to the municipal environmental protection department statistics, in 2017 the transformation range Jinan included in the elimination of 35 tons of steam and the following business units of coal-fired boilers 323 units, 1605 tons of steam coal-fired boiler units of 69, 189 tons of steam; the need for ultra-low emissions the transformation of more than 35 tons of steam coal-fired boilers of 94, 14 960 tons of steam. The issued rewards and subsidies, the Municipal Finance Bureau to take "the first disbursement, after the liquidation," the way out of the transformation of the inclusion of ultra-low emissions and transform the scope of coal-fired boilers in 2017 the implementation of full coverage, in accordance with the award criteria make a one-time pre dial counties and districts, counties and districts in the implementation of rehabilitation programs out of the boiler can award up early disbursement of funds of enterprises and units, to be enterprise, unit after the completion of the transformation carried out of funds liquidation.

Meanwhile, the Municipal Finance Bureau called on counties and district financial departments should closely cooperate with the environmental protection department, the main responsibility for the effective implementation of good out of the transformation of coal-fired boilers, will award up funds earmarked for municipal 35 tons of steam coal-fired boilers and substitution and elimination more than 35 tons of steam coal-fired boiler reconstruction project of ultra-low emissions (including troops out of coal-fired boiler replacement) cash incentives and subsidies, strengthen capital management, give full play to the financial capital efficiency.