chinese coal fired hot water boilers

Greater than 65t / h industrial boiler of what air pollutant emission standards should be executed? A: The State Environmental Protection Administration, Central Division-standard [1993] No. 012 document pointed out that the emergence of a small number of parameters currently higher than GB1921-80 "industrial steam boiler parameters Series" and GB3166-82 "chinese coal fired hot water boilers parameters Series" layer burning, stoker boiler, regardless of its use Zanan GB1327-91 execution. Therefore> 65t / h or more (except coal, circulating fluidized bed, and fuel, gas fired boilers) industrial boilers should be performed "boiler air pollutant emission standards."

In the fierce competition in the market, fast boiler adhere to "not forget the early heart, sustained ingenuity" of the faith, taking the long view, establish and improve a comprehensive overall solution, leading to control market trends, improve the environmental performance of the boiler, make unremitting efforts to build China clean boiler brand.

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 chinese coal fired hot water boilers 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.

Corrosion chinese coal fired hot water boilers hot water boiler is the main production of hot water, installed in the hotel, baths, hotels and other places, and therefore can not be avoided microbial corrosion in the air, but there are some factors that lead to corrosion of equipment, gave the following corrosion we introduce equipment: 1, constant pressure expansion tank and the boiler is inconsistent: expansion tank provided on the third story height is less than 15 meters, but the constant pressure of the boiler 2,5kg / cm2, the result is held fireman 2 , 5kg / cm2 working pressure indicators, regular replenishment, the water overflows into the ditch for no apparent reason, that water fees and expensive coal. 2, no maintenance shutdown boiler outage after the heating period, some filled with soft water boilers, boiler and some exposure to the atmosphere, the lack of necessary maintenance. 3, a relatively fast flow rate ① of the entire process also needs to be done using the corresponding control of the respective flow velocity, because during use too fast or too slow in the boiler water flow rate will be such that there are different crossing rust. ② When the water inside the boiler would cause excessive diffusion rate of various substances contained inside the boiler becomes faster, this situation will be such that the angle of the underlying boiler corroded velocity have a certain upgrade. ③ When the flow rate is too slow water inside, so that it will overflow the phenomenon of gas generation, these gases normally overflow adheres to the inner metal wall of the hot water boiler, the boiler portion of the metal over time will corrosion phenomenon. 4, does not control the amount of leakage of water supply hot water system is generally not more than one per cent of the water capacity of the system, but some have mistaken equipment, the use of hot water on the convenience, the hot water system used for bathing, washing clothes etc., a 2.8MW and pay hundreds of tons per day. 5, the hot wire mounting network failure, the user can not send the circulating water system ends. Some users in order not to be cold, to increase the number of air emissions, drainage to hot, not to cool row, the result of increasing the amount of leakage. The main reason for hot water boiler corrosion occurs on the user, their lack of cleaning and maintenance of the equipment, can also lead to serious device can not open, so we want to do in the course of its maintenance, regular waxing or lubricating coating oil.

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