Automatic backwashing system for water vapor sampling filter of thermal power plant

Abstract

The invention relates to an automatic backwashing system for a water vapor sampling filter of a thermal power plant. The system comprises a filter, a measurement flow cell and a backwashing water storage tank, a water inlet of the filter is communicated with a water vapor inlet pipe; the water vapor inlet pipe is connected with a first electric control valve in series; the water vapor inlet pipe is communicated with a backwashing drain pipe; a second electric control valve is connected in series to the backwashing drainage pipe; a water outlet of the filter is communicated with a water vapor outlet pipe; the water vapor outlet pipe is connected with a third electric control valve in series; the water vapor outlet pipe is communicated with the measurement flow cell; the measurement flow cell is communicated with the backwashing water storage tank through a communicating pipe; a backwashing water storage tank is communicated with a backwashing pipe, the backwashing pipe is connected backto a water vapor outlet pipe, a backwashing water pump is connected in series to the backwashing pipe, a fourth electric control valve is connected in series to the backwashing pipe, and the filter can be automatically or manually backwashed after running for a certain period, so that the quality of water vapor in a system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of water vapor sampling systems in thermal power plants, in particular to an automatic backwashing system for water vapor sampling filters in thermal power plants. Background technique [0002] In the thermal system of a thermal power plant, the main working media are water and steam. The quality of water and steam directly affects the performance of the heat engine. and steam quality, prevent boilers, steam drums, steam turbines and other thermal equipment from being affected by unfavorable factors such as corrosion and scaling, and ensure safe and stable operation. Index supervision is becoming more and more important. At present, online instruments are generally used to continuously monitor the water vapor quality. After a period of time, the amount of impurities retained by it reaches the upper limit, and the filter element needs to be replaced manually. For the filter outer cylinder made of stainless s...

AI Technical Summary

Problems solved by technology

[0003] In view of the serious pollution of the filter element in the water vapor sampling system of the current power plant, which affects the accuracy of the online chemical instrument and shortens the service life of the measuring electrode, the purpose of the present invention is to provide an automatic backwashing system for the water vapor sampling filter, which can effectively solve this problem

Images