Improved safe automatic ammonia distributing device and automatic ammonia distributing method

Abstract

The invention discloses an improved safe automatic ammonia distributing device and an automatic ammonia distributing method. The device comprises an automatic ammonia distributing control cabinet, a distributing box and ammonia escaping preventing device, an ammonia detecting and alarm system and an ammonia absorption protecting device which are connected with one another; the conductivity of ammonia water in the distributing box is detected by utilizing a conductivity meter, and is converted into the concentration of the ammonia water through a PLC (Programmable Logic Controller) in the automatic ammonia distributing control cabinet; when the concentration is lower than a set value, the PLC gives an instruction to turn on an ammonia water circulating pump and open an outdoor ammonia electric valve; when the concentration reaches the set value, the PLC gives an instruction to turn off the ammonia water circulating pump and open the outdoor ammonia electric valve; when the liquid levelof a reagent box is lower than the lower limit of a set value, the PLC gives an instruction to open a demineralized water inlet electric valve; when the liquid level of the reagent box reaches an upper limit of the set value, the PLC gives an instruction to close the demineralized water inlet electric valve. According to the improved safe automatic ammonia distributing device and the automatic ammonia distributing method, manual operation is not required during a preparing process of the ammonia water; meanwhile, the ammonia water circulating pump introduces the ammonia indoors in a form of the ammonia water after the ammonia is absorbed through the ammonia absorption protecting device, so that indoor electric equipment is not required to be subjected to explosion-proof upgrading.

Description

technical field [0001] The invention relates to the technical field of adding ammonia to unit feedwater in thermal power plants and nuclear power plants, and in particular to an improved and safe automatic ammonia distribution device and an automatic ammonia distribution method. Background technique [0002] The water supply systems of thermal power plants and nuclear power plants generally adopt ammonia addition for anti-corrosion, but at present, most of them use ammonia water to make a certain concentration of ammonia water and then add it to the water supply system of the unit. During the process of configuring ammonia water, people will be exposed to ammonia water, which will cause occupational safety. certain influence. At the same time, in the process of using ammonia gas and demineralized water to configure ammonia water through the automatic ammonia distribution device in the dosing room, it is necessary to upgrade the electrical equipment in the dosing room to expl...

AI Technical Summary

Problems solved by technology

[0002] The water supply systems of thermal power plants and nuclear power plants generally adopt ammonia addition for anti-corrosion, but at present, most of them use ammonia water to make a certain concentration of ammonia water and then add it to the water supply system of the unit. During the process of configuring ammonia water, people will be exposed to ammonia water, which will cause occupational safety. certain influence

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