The valves used in coal plants should be multifaceted.
Out-of-stock desulfurization systems should take into account the temperature and corrosiveness and seal leakage criteria. Commonly used butterfly valve, ball valve and gate valve.
Materials handling system will be used pneumatic knife gate valve, plug-in valve, powder special butterfly valve, V-type ball valve, ceramic valve, screw conveyor valve also takes into account the wear resistance.
Commonly used water system ordinary soft-seal butterfly valve can be. Ammonia ammonia minimum standard stainless steel 304 material ball valve, small-caliber with three-piece threaded ball valve, large diameter flange with two-piece ball valve, the seal is good.
Chemical valves and coal chemical project valves
Chemical valves are an important accessory for fluid control in industrial pipelines. Facing a wide variety of industrial systems and valve conditions, the Chemical Valve is intended to choose the right chemical valve for the piping system.
Chemical valves Overview:
Chemical valves are an important accessory for fluid control in industrial pipelines. Faced with a variety of industrial systems complicated and a wide variety of valve conditions, you want to select the appropriate valve for the pipe system, one should understand the valve performance, the second should be mastered Select the steps and basis for the valve, three should follow the principle of choice of oil, chemical industry valves.
Chemical valve is not only applicable to a wide range, but also the amount of more, of course, chemical valves than the average valve to be higher. Chemical valves generally use the media are relatively easy to corrosion, a simple chlor-alkali industry, to large-scale petrochemical enterprises, there are high temperature, high pressure, corrosion resistance, wear resistance, great temperature pressure difference. The face of such a higher risk of the valve, the selection and use of the process should be strictly in accordance with the implementation of chemical standards.
Chemical valve selection principle:
The chemical industry generally chooses the straight-flow valve as the flow passage, the flow resistance is small, it is usually chosen as the valve for cut-off and open media, the valve for easy regulation of flow is used as control flow, and the stopcock and ball valve are more suitable for commutation and shunting , Closure along the sealing surface sliding with wiping the valve is most suitable for the medium with suspended particles. Common chemical valves are ball valves, gate valves, globe valves, safety valves, plug valves, check valves and so on. Chemical valve media with the mainstream of chemical substances, including acid-base corrosion of a wide range of media, the main 304L and 316 in the material-based, common media should also choose 304 as the leading material, a variety of chemical corrosive fluids should be selected alloy steel or liner Fluorine valve.
The role of chemical valves:
Opening and closing role: cut off or communicate the flow of fluid in the tube;
Regulatory effect: regulate the flow of the tube, the flow rate;
Throttling effect: the fluid through the valve after a great pressure drop;
Other functions: a. Automatic opening and closing b. To maintain a certain pressure c.
Chemical valve precautions before use:
â‘ valve inside and outside the surface with or without blisters, cracks and other defects;
â‘¡ valve seat and the valve body is firmly bonded, valve plug and seat are consistent, sealing surface without defects;
â‘¢ stem and spool connection is flexible and reliable, whether the valve stem bending, thread damage;
â‘£ valve opening is flexible and so on.
Chemical valve often used in the process of problems
1, flanges and pipelines connected with pipelines;
2, packing culvert leakage, lumbar pad leakage and stem open;
3, between the valve core and the valve lax between the formation of internal leakage
Gas Liquid Separators,Vapour Liquid Separator,Water And Gas Separator,Vertical Gas Liquid Separation
Wuxi NanQuan Pressure Vessel CO.,Ltd , https://www.nanquanvessels.com