Steam boiler water hardness online measurement and control device

Abstract

The invention discloses a steam boiler water quality hardness on-line measurement and control device, a raw water port is connected with boiler raw water, the raw water port is connected with a resin tank input port by a water demineralizer head, a salt tank is connected with a resin tank by the water demineralizer head, an output port of the resin tank is respectively connected with the input end of a second three-way valve and a softened water tank, one output end of the second three-way valve is used as a softened water sampling port, the other output end of the second three-way valve passes sequentially through a hollow membrane filter, a constant flow valve and a solenoid valve to be connected with a measuring tube; the measuring tube is provided with a blender, a regent box is connected with a dosing pump, the output port of the dosing pump is connected with the middle part of the measuring tube, a light source and a light receiving element are arranged on both sides of the measuring tube. A series of actions of the sample water can be periodically and automatically performed by the steam boiler water quality hardness on-line measurement and control device, the steam boiler water quality hardness on-line measurement and control device can control water treatment operation and regeneration by the water treatment equipment; hardness excessive water can be prevented to enter into a boiler, the boiler safety performance can be significantly enhanced, and the user manual operation management cost can be reduced.

Description

technical field [0001] The invention belongs to an online measurement and control device, in particular to an online measurement and control device for water quality hardness of a steam boiler in the technical field of online water quality monitoring. Background technique [0002] The water quality of the steam boiler directly affects the safe and economical operation of the boiler. Therefore, water quality monitoring is very important. Especially once the boiler feed water hardness exceeds the standard, Ca 2+ , Mg 2+ (the main ingredient that forms scale) and other hardness components are brought into the pot to evaporate and concentrate, decompose at high temperature, scale is precipitated, and scale is formed on the heating surface of the boiler. Scaling will directly affect boiler heat transfer and normal steam-water circulation, which will not only reduce thermal efficiency and waste fuel, but also cause accidents such as pipe burst and bulging in severe cases, affect...

AI Technical Summary

Problems solved by technology

The traditional water hardness monitoring method is to carry out manual water testing on a regular basis. Manual water testing has problems such as untimely, regular, and error-prone problems; the traditional regular water treatment operation and regeneration is that water treatment equipment is set in advance according to time, flow, etc. It is better to start the regeneration, but the water treatment operation and regeneration cannot be carried out in real time according to the water hardness exceeding the standard

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