boilers to generat electricity from biomass
Coal-fired boilers to generat electricity from biomasss to gas boilers benefits and precautions With the rapid development of national energy-saving environmental protection, the traditional coal-fired boiler can not meet the needs of the times. Therefore, the coal-fired boiler biomass boiler or gas boiler has become in many boiler user's choice. Before the transformation, to understand the difference between .1 and gas boiler fired boiler. Circulating fluidized bed combustion boiler fired by coal crushing device fluidized combustion process, the coal by crushing device percutaneously into the bunker through a the spreading coal coal injecting air into the furnace; circulating ash by heating, fluidized combustion process. When the coal into a gas fuel is injected directly into the combustor for combustion. 2. Combustion of Coal is mainly composed of C, H, O, N, S, ash and moisture and other elements. Generated when coal SO2, SO3, NOx ash and moisture, and SO2, SO3, NOx from flue gas emitted into the atmosphere, pollute the environment and cause harm to humans. The main components of the exhaust gas and coke are CO and H2. The main produce CO2 and H2 post-combustion, much lower than coal-fired boiler SO2, SO3 and NOX emissions. 3. Ventilation pressurized combustion coal combustion boiler used in a combustion mode. The bottom of the combustion process through the induced draft fan with fan and completed. In the combustion of coal, it requires a lot of air. Gas under a slight positive pressure in the boiler or burner slightly negative pressure, which requires less airflow. Burner air may be pre-mixed with natural gas. 4. coal boiler control reasons, material thickness, amount of wind, the wind volume, wind and other than coal, coal-fired boiler is difficult to automatically adjust the operating parameters of the boiler according to the load. However, fewer factors gas boiler, the burner valve can be adjusted according to the size of the load, easy to implement automatic control. Coal-fired boiler to a gas boiler Notes: Main results are as follows: (1) small boiler, the coal-fired boiler to a gas boiler, i.e. the negative pressure of combustion from the original to the current combustion slight positive pressure, and must pay attention to the furnace wall structure sealing problems. Closely related (2) selection and arrangement of the burner and furnace, the degree of filling of the flame in the furnace is preferably not formed dead air, to avoid the interference of adjacent flame burners, to avoid interference from adjacent burner flame. Unburned gas - air mixture should not be in contact with a heated surface, in order to avoid incomplete combustion. Gas combustion. Gas burner arrangement disposed conduit and ducts should be considered reasonable gas pipe and duct arrangement, ease of operation, inspection and maintenance. (3) the transformation of coal-fired boilers is mechanized layered gas boiler should be removed before the arch and the arch, and the bottom heating surface increases, in place of the grate, the grate to prevent overheating. Gas Velocity (4) on heat transfer surface of the fly ash is not restricted abrasion conditions, convection heating surface heat transfer coefficient is increased, increasing the pressure in the boiler where H is unduly increased. Boiler erosion surface. At this time, the capacity of the boiler should be noted that the steam separator to ensure the quality of the steam.
Each boilers to generat electricity from biomass will generate 250 tons/hour of low-pressure steam for the alumina refinery; however, the design allows for conversion to high-pressure steam generation for the future addition of a steam turbine for electricity generation.Coal or biomass will be the primary and backup fuels, respectively.
Circulating Fluidized Bed Boiler can burning various types coal and biomass fuel generally,and circulating fluidized bed boilers to generat electricity from biomass used in industries for production processing and power plant to generate electricity mostly.
Since the occurrence of Zhangjiakou City, February 28th a tragic accident 15 tons of biomass boilers to generat electricity from biomass explosion (caused 3 dead 7 injured), Hengshui High-tech Zone Branch of monitoring the quality of the region's rapid convening of an emergency boiler safety special rectification will deploy a total of more than 60 home boiler unit, install the unit to participate.
At the meeting of the relevant provisions of the "Special Equipment Safety Act" Publicizing a comprehensive and read the "Hengshui City High-tech Zone boiler special rectification action plan", will use a month's time, carry out a comprehensive risk investigation to ensure the region's security boiler . Special Inspection Branch of the provincial hospital Hengshui boiler room main person in charge of inspection requirements for boilers and risk points were explained in detail.
The meeting stressed that all units should deeply learn boiler explosion safety lessons from the accident occurred recently around the country, and continuously enhance the sense of responsibility, strengthen risk awareness, problem seriously put their own problems and routine regulatory inspection found hidden in a timely manner rectification, study and solve countermeasures. To step up publicity on the one hand, and the regulatory authorities to supervise boiler unit to improve the system and strengthen the boiler safety training to improve skills of workers boilers, prevent illegal operation; on the other hand, vigorously promote the special equipment and boilers and other laws and regulations use common sense, use boilers to improve safety awareness, enhance self-awareness and self-protection ability of the masses. By month renovation, so security was tubes, equipment information, personnel documents, maintain dimensional record. Meanwhile, the number of law enforcement agencies to investigate and punish illegal cases, the exposure of some illegal businesses, education, warning a number of luck in the use of units, and strive to create "Care for life, concerned about security," a good social environment.