General working principle of steam desuperheating and decompression device

Our North Valve Group Co., Ltd. is a manufacturer of research and development, production and sales of standard general industrial valves, such as steam temperature and pressure reducing devices, ball valves, gate valves, butterfly valves and globe valves, with diameters ranging from 10mm to 3000mm and nominal pressure PN ranging from 1Mpa to 80Mpa. At the same time, we can also customize non-standard valves for you. Welcome to call us.

                Steam desuperheating and decompression device/desuperheating and decompression device, as the name implies, is to reduce high-temperature and high-pressure steam to low-pressure and low-temperature steam (which can be superheated steam) that customers can use. Take the superheater outlet of the boiler as an example, the steam generated by the boiler goes through the superheater outlet to the steam turbine to do work, and the steam turbine has a range requirement for the steam parameters entering. If the steam parameters at the superheater outlet exceed the high limit required by the steam turbine, it will cause damage to the steam turbine. Therefore, it is necessary to use the steam temperature and pressure reducing device/temperature and pressure reducing device to reduce the parameters to the applicable range. The fault treatment of steam desuperheating and decompression device was studied in the previous part, and then the general working principle of steam desuperheating and decompression device was understood in this paper.

Steam temperature and pressure reducing device 

The principle of temperature reduction is divided into two categories according to different equipment;

1. Surface type: Generally, it is a shell with tube bundles, which are made of steel pipes or brass pipes. In power plants, water or steam usually flows in the shell, and a fluid flows in the tube bundles. In the data, the former is called' shell side' and the latter is called' tube side'. There is a temperature difference between the tube side and the shell side, that is, the tube wall of the tube bundle, inside and outside.

2. Mixed type: it uses the pressure higher than that of the fluid to be cooled, and generally, pure water is directly sprayed into the fluid to be cooled and mixed together to achieve the purpose of cooling.

At present, the method of throttling is widely used, that is, installing an adjusting door on the pipeline and adjusting the opening of the door according to the required pressure after decompression, so as to achieve the purpose of decompression by controlling the flow. Some steam desuperheating and decompression devices have a certain distance between desuperheating and decompression devices, and the appearance looks very clear. Some of them put desuperheating and decompression together, which is not easy to understand. Note that no matter what kind, the temperature is reduced first and then.

After reading the General Working Principle of Steam Desuperheating and Decompression Device, I believe you have a certain understanding of steam desuperheating and decompression device. Our North Valve Group Co., Ltd. is a manufacturer of steam desuperheating and decompression device. For decades, the company has sold high-quality valve products, and the product technology and quality have been certified by national authorities, reaching national standards and deeply trusted by customers.

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