Qinhuangdao City Funing District Branch of Ecological Environment Agency organized the key enterprises responsible person within the jurisdiction of the boiler breakdown in ireland demolition, renovation work will hold a special schedule. The meeting stressed the need to vigorously promote coal-fired, gas-fired boiler demolition, renovation work progress, continued to improve ambient air quality.
At the meeting, staff of the Office of atmospheric area of the current coal-fired, gas-fired boiler demolition, renovation progress has been informed. Up to now, boiler demolition and reconstruction of the region involved all disabled.
First, Funing District compressed air quality improvement increasingly smaller space, air pollution prevention and control situation is very serious, involving various enterprises must attach great importance to effectively assume responsibility for environmental protection.
Second, the coal-fired boiler in accordance with the "water power, chimney down, shifting the body" standard transformation and low nitrogen oxides emissions analyzer mounted nitrogen gas boiler work requirements, make sure the end of this completed, the embodiment late cut-off regulation.
Third, the Bureau of atmospheric sciences, environmental law enforcement unit to further strengthen law enforcement and inspection and supervision, the monitoring center to provide scientific data monitoring, to crack down on environmental violations, it is important to ensure that coal-fired, gas-fired boiler demolition, renovation work is completed on time.
Problematic fired boiler breakdown in ireland (1) Henan small boiler gas boiler should be noted, by the Henan coal into gas boiler, i.e. the original becomes a negative pressure is now slightly positive pressure combustion burner, the furnace must be noted that the structure and the sealing wall problem; (2) prevent explosion of the furnace, a gas fired boiler furnace to Henan, when defective or incomplete combustion of fuel atomization gas in the furnace or heating surface of the end aggregate, fire or explosion occurs, and therefore, in appropriate sites shall boiler explosion vent means, while the control program should be added to the ignition and flame protection device of automatic control, to ensure safe operation of the boiler; (3) the selection and arrangement of the burner close to the furnace in the form of, should the flame in the furnace better fullness without forming dead air; adjacent flame of the burner to avoid mutual interference; low load flame holding in the furnace central position, offset from the center of the furnace to avoid the flame center of symmetry; unburned gas-air mixture is not in contact with the heated surface , to avoid the formation of incomplete combustion gases; hot flame to avoid high-speed heating surface erosion, in order to avoid excessive heating surface so that the wall strength of overheating. Burner arrangement also consider the gas pipe and duct arrangement, easy to operate, inspection and maintenance; (4) Mechanized layered coal-fired boiler, gas boiler to change Henan, first removing its longitudinal arch, taking into account the increase in the bottom heating surface to replace the grate, grate to prevent overheating burn; (5) gas velocity Henan convection heating surface is not limited by the gas boiler ash abrasion conditions, gas velocity can be increased properly, so the convection heat transfer heating surface coefficient increases, without increasing the heating surface of the boiler, can increase the pressure of the boiler, steam-water separation capability should be noted that at this time means the pot to ensure the quality of steam, hot air for the boiler had particularly important.
In recent years, China's environmental protection departments have been promoting the boiler breakdown in ireland "coal to gas" to reduce emissions, and win the Battle of the sky ", to coincide with the recent natural gas price, have not you transform coal-fired boiler, still What hesitate?
How to prevent corrosion of the gas boiler breakdown in ireland gas boiler it if the temperature is too high, some of the components of the boiler working long hours in the intense heat of the environment at work, the situation will cause boiler corrosion occurs. So, we are in the process of work what to do to reduce the corrosion of it? Here to tell you about some of the methods of preventing corrosion of boiler gas. Reason and approach demands on internal corrosion of the gas boiler must be in accordance with the methods and principles of conduct, you can now use a more extensive domestic and international gas boiler corrosion detection approach is magnetic flux leakage and ultrasonic detection. Ultrasonic Ultrasonic detection is used to measure the wall thickness after etching using the principle of ultrasonic pulse reflection. The basic principle of magnetic flux leakage method leakage flux detection method is based on the high-permeability properties of the ferromagnetic materials, magnetic permeability of the gas boiler corrosion disadvantage is much less than the permeability of the furnace, the applied gas boiler is magnetized in a magnetic field effect, when the furnace is no disadvantage, most of the magnetic lines of force through the pipe. Uniform distribution of lines of magnetic force at the moment; when the internal elbow has the disadvantage that the onset of meander lines of magnetic force, and a part of magnetic lines of force from leaking out of the outer steel pipe. Detecting the escaping magnetic flux leakage outer elbow, it can be determined whether the shortcomings exist. When the probe detects a straight guide hot oil furnace inner wall emit ultrasound pulse, to receive from the probe first reflected pulse within the outer wall, and will receive the ultrasound probe, this pulse and the pulse reflected from the outer wall of the outer appearance of the reflected pulse trip distance between the reflecting wall thickness. Gas-fired boiler in accordance with the practices and conditions set forth in the demand for the detection of practice, in accordance with the detection of ultrasonic inspection method can be distinguished way. High temperature components such as a gas boiler front panel, convection superheater and reheater temperature is the primary structural member and the like inside the boiler, a very long time to work in the harsh environment of use of the medium flame, smoke, ash, etc., and therefore the working process changes occurred in the organization and function of a range of materials, these changes hit the gas boiler creep, fatigue, corrosion, erosion and other messy aging and failure mechanisms. These high temperatures Microstructure component material will follow the extension of working time deteriorated creep damage occurs, such as loose pearlite, spheroidized carbides, grain boundary and growth mobilization, holes creep, intergranular cracking occurs .Free Chat
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