Fangkuai Group has more than 60 independent intellectual property rights, advanced clean fuel industrial steam iron and boiler manufacturing technology, and jointly established a clean fuel boiler production, research and research cooperation base with Tsinghua University and Xi'an Jiaotong University. An enterprise with a R & D and test center for clean fuel boilers. The thermal efficiency of “Fangkuai” boilers can reach 107%, which has been included in the national special equipment energy-saving catalog. The company developed ultra-low nitrogen full premixed combustion condensing boilers and ultra low nitrogen emission fuel gas boilers, which are developed by the company using Ultran condensation technology.
Second, the hand hole leakage gas industrial steam iron and boiler: angle change means scratch attempt to see the hand hole cover for deformation conditions, if deformed, the first proofing, green tape and then wrapped in a layer of the uniform mat, preferably before overhaul and consistent orientation .
Excessive air in the boiler furnace will affect the furnace combustion. Therefore, how to effectively control the air excess coefficient is one of the prerequisites for ensuring the reasonable operation of the boiler. Today, we will explain the excess air in the gas boiler with high degree of automation as an example: Furnace air excess coefficient is one of the important indicators to control the combustion process of gas boiler furnace. For the layer furnace, the air excess coefficient at the exit of the furnace is generally between 1.3 and 1.5. According to the air leakage of each flue section of the flue gas, the air excess coefficient of the exhaust should be 1.8-2.0. There are three factors that determine the heat loss of smoke exhaust: exhaust gas temperature, air excess coefficient and cold air temperature. Among them, the air excess coefficient of gas boilers is the main influencing factor. Excessive air excess factor is a great waste. A large amount of cold air enters the furnace, firstly reducing the furnace temperature, the combustion conditions tend to be unstable, and the volume of the flue gas is increased, and the heat loss of the exhaust gas is increased. Calculations show that when the air excess factor is increased from 2.0 to 3.0, the exhaust heat loss increases to 4.5%. At the same time, the burden of the blasting fan is increased, and the power consumption is increased. In order to improve the thermal efficiency of gas boilers, it is necessary to pay attention to and improve the understanding of the serious hazard caused by excessive air excess coefficient, and strictly control the air excess coefficient in combustion regulation, which is a field often overlooked in the heating industry.
A: the adaptability of the gas sources 1: Natural gas must depressurization gas regulator and gas regulator, the pressure before the Burner selected to meet the requirements before entering the burner, in order to work properly. 2: automatic adjustment operation of the industrial steam iron and boiler performance requirements: since a large gas consumption of the gas boiler, gas boiler as possible in order to reduce impact (sudden pressure regulator after the gas lift system during starting or stopping, sags ), controlling the gas boiler during operation must meet the following requirements: start (1) gas boiler must be adjusted to start at the minimum load of 30% (the rated load); (2) a gas boiler must be gradually reduced before shutdown load, rated load to be reduced before shutdown when the valve closes the solenoid 30%; (3) boilers can be automatically adjusted according to the boiler heat load during normal operation of the actual output stage operating conditions, automatically increasing demand for large Great demand hours automatically reduced, self-sustained heat balance of supply and demand, greatly reducing the number of start and stop the boiler; when reduced to 30% or less of the rated load, heat production is still greater than the output of the boiler, before proceeding down. (According to relevant statistics, the explosion occurred in the gas boiler start-up and shutdown of these two periods that occurred during ignition and fire in., A small gas boiler gas explosion has occurred 2/3 during ignition) (4) is provided above the automatic adjustment function is particularly important when a voltage regulator with many boilers, the boiler can start to avoid pressure fluctuations caused by stopping overpressure safety device or system boiler gas low-voltage protection action, the normal operation of the boiler shutdown. Two: for gas safety, gas boilers must have security facility 1: ignition control system for a gas boiler before ignition, purge the furnace and flue must be carefully excluded combustible gas furnace may be accumulated. A reasonable ignition process control systems to cope with the ignition process is automatically controlled fan only after the completion of furnace cleaning tasks to perform ignition; only when the ignition flame has been established (confirmed by a flame detector), and after a predetermined time has elapsed, a control valve main burner to open; ignition flame is automatically extinguished after a predetermined period of time; when the main flame could not be ignited within a predetermined period of time, the main burner can be automatically and quickly turn off the ignition flame is extinguished while gas boiler ignition procedures are generally monitored and controlled by a program controller. Control of the ignition process, the ignition before the total ventilation should be not less than 3 times the total volume from the furnace to the chimney population. 2: Safety Devices gas boiler is run prevent excessive wind load caused by a low flame, combustion automatic adjustment device should be installed on each boiler, intake air volume and gas supply gas boiler control linkage.
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