Quick-assembly dial for optimizing and adjusting manual tooth-shaped butterfly valve through SCR ammonia spraying

Abstract

The invention discloses a quick-assembly dial for optimizing and adjusting a manual tooth-shaped butterfly valve through SCR ammonia spraying. An upper disc is arranged on the right side above an existing tooth-shaped disc surface, a lower disc is arranged on the left side below the existing tooth-shaped disc surface, two sides of the existing tooth-shaped disc surface are provided with an opening limiting claw and a closing limiting claw, the upper disc and the lower disc are both connected with the opening limiting claw and the closing limiting claw, a dial gauge is arranged on the upper disc, a main handle and an auxiliary handle are connected through a spring and rotate relative to the dial gauge, the tip end of the main handle adjusts the opening degree of the valve by adjusting different scale positions in the dial gauge, and the lower disc is pressed through the front end of the auxiliary handle to lock the opening degree of the valve. According to the quick-assembly dial for optimizing and adjusting a manual tooth-shaped butterfly valve through SCR ammonia spraying, the overall structure is simple, the cost is low, the dial with the higher precision can be installed on line, the valve opening degree can be adjusted according to the indication of the dial gauge, the precision is improved, and the quick-assembly dial can better adapt to fine adjustment of ammonia spraying amount distribution under the ultra-low emission condition.

Description

technical field [0001] The invention belongs to the technical field of manual toothed butterfly valve parts, and in particular relates to a quick-install dial used for SCR ammonia injection optimization and adjustment of a manual toothed butterfly valve. Background technique [0002] With the increasingly stringent NOx emission standards, coal-fired power plants in my country have generally installed SCR flue gas denitrification devices. The device usually uses ammonia as a reducing agent, which is sprayed into the flue through the ammonia injection grid system, mixed with NOx in the flue gas, and then catalytic reduction reaction occurs in the downstream catalyst layer to achieve the purpose of removing NOx in the flue gas. Due to the deviation of the flue gas volume and NOx concentration distribution on the flue section, the demand for ammonia in each area is inconsistent. The regional ammonia gas flow is distributed reasonably, thereby improving the overall performance o...

AI Technical Summary

Problems solved by technology

However, the dial still has a tooth-shaped structure with 10 gears, which does not change the adjustment accuracy. In addition, this kind of fan-shaped dial needs to be connected and fixed through the opening of the valve body itself and the positioning hole on the dial during the production process of the butterfly valve. Flexible assembly on existing valves already in use

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