Most people may already know something about flue gas waste heat recovery, because they have already explained a lot about it. In order to let you know the relevant knowledge of flue gas waste heat recovery, the following is a brief introduction to the two methods commonly used for recovery. Shanghai Horizontal steam generator Two methods are usually adopted for flue gas waste heat recovery: one is to preheat the workpiece; The other is to preheat air for combustion support. The flue gas preheating workpiece needs to occupy a large volume for heat exchange, which is often limited by the operation site (this method cannot be used for intermittent furnaces). small-scale Horizontal steam generator manufactor Preheating air for combustion support is a good method. It is generally configured on the heating furnace, which can also strengthen combustion, speed up the temperature rise of the furnace, and improve the thermal performance of the furnace. This can not only meet the requirements of the process, but also achieve significant comprehensive energy-saving effect.

Most softened water equipment can only slow down the scale growth rate, but can not achieve the purpose of scale prevention. The water quality used by different users varies greatly in different regions. Shanghai Horizontal steam generator In some construction sites, steam generators are used for steam maintenance of bridges because tap water cannot be used due to conditions. Only groundwater or river water can be used. At present, the hardness of many groundwater in China exceeds the standard, and the total hardness of water in some areas is high. small-scale Horizontal steam generator manufactor It can reach several hundred millimoles, which is a serious situation. I think the use of water softener is basically ineffective, because ordinary resin exchange water softener can only affect water with hardness of 7, which also ensures the use process. It needs to be cured regularly.

Inspection and use preparation of oil and gas boiler. Inspection of the furnace and flue, and the soot and sundries in the furnace and flue shall be removed. Shanghai Horizontal steam generator Check the boiler accessories to see if they are in good condition; Whether the cock can rotate easily; Whether the instruments and control devices are in good condition and clean. After inspection, the pressure gauge cock shall be in working condition. Check the automatic control system. Check the auxiliary equipment of oil and gas boiler. Check the combustion equipment to see if the combustion equipment is in good condition; For mechanical transmission system, coal handling system and ballast system, the test steering is normal; The spring of the gearbox shall be properly compressed and lubricated; The indication of coal door gauge is correct. small-scale Horizontal steam generator manufactor The eagle iron is neat and complete, and the ballast plate is complete. Check the heating surface and ensure that the equipment coupling is firmly connected; V-belt is loose properly; The lubricating oil is in good condition; The cooling water is smooth. After passing the test, install the protective cover, test run separately, and pay attention to the current during idling.

Energy saving. The waste heat boiler adopts new heat exchange fins and heat exchange elements, which enables full heat exchange. The boiler efficiency can be increased by 6~15%, and the condensate drainage structure can fully recover the latent heat in the flue gas. The energy-saving effect is remarkable. Shanghai Horizontal steam generator Due to the special structure, the total pressure drop is small and the power consumption is small, that is, the smoke pressure drop is small and meets the system requirements. beautiful. Due to the use of efficient heat exchange elements and reasonable structural configuration, the waste heat boiler has the characteristics of compact structure, small size, beautiful appearance, etc. Durable. Heat exchange tubes of waste heat boiler facilities are made of stainless steel aluminum fins for corrosion prevention. small-scale Horizontal steam generator manufactor The thermal stress, anti-corrosion performance and strength are fully considered when the equipment is manufactured, which can ensure the safety, reliability and stability of the equipment, with a service life of more than 25 years.

System oil drainage: circulate the heat transfer oil between 120 ± 5 to drain the heat transfer oil in the system (if you do not replace the oil, please find a clean container to store it properly). Prepare an appropriate amount of coke removal cleaning agent for the heat transfer oil system, drain the oil in the gas-fired heat transfer oil boiler system, and disconnect the cleaning system from the oil storage tank (close the valve), including the connection between the high-level tank and the oil storage tank. Shanghai Horizontal steam generator Residual oil blowing steps: connect the air compressor at the pressure gauge or other places that can be connected, boost the system to 0.3-0.4MPa, and discharge it instantaneously; Repeat this process until the residual oil is blown out. The gas-fired heat transfer oil boiler, circulating pump, and other heat users form a cleaning circulating circuit for decoking and cleaning: add diluted cleaning agent to the system and fill it up to 1/2 of the water level of the high-level tank. Dosage of coke removal cleaning agent: 10~20%, the specific dosage shall be determined according to the scale thickness. Temperature: 90-95, time: 12-72 hours, which can be determined according to the scale thickness. Rinsing and cleaning: after cleaning, drain the residual liquid in the system and add clean water to rinse twice until the coke remover is free of foam and the water is clear. small-scale Horizontal steam generator manufactor Temperature: 85-95, time: 5-8 hours Water blowing steps: after cleaning, connect the air compressor at the pressure gauge or other places that can be connected, use compressed air to boost the system to 0.3-0.4 MPa, and vent at each low point. Repeat this process until the water is blown out. Waste liquid treatment: the cleaning waste liquid generated in the cleaning process is discharged after being treated in the biochemical tank.