Method for improving output of positive-pressure dense-phase ash conveying system and optimizing ash conveying operation

Abstract

The invention discloses a method for improving output of a positive-pressure dense-phase ash conveying system and optimizing ash conveying operation. In the prior art, the design ash conveying guarantee value of an electric field I of an electric dust remover is 55.5 tons per hour, the design output surplus is small, and the maximum ash production of the electric field I is 57.5 tons, so that the production requirement cannot be met, and the operation rate and efficiency of the electric dust removal electric field are seriously influenced. The method comprises the following steps: (1) adjusting the switching sequence of an air inlet valve, an air supplementing valve I and a blowing assisting valve; (2) increasing the ash conveying end pressure value from 35KPa to 90KPa; (3) additionally arranging a DN219 ash conveying pipeline in an electric field I, and connecting two bin pumps in series to pass through one ash conveying pipeline; (4) adjusting the air inflow of throttling orifice plates of the air inlet valve, the air supplementing valve I and the blow assisting valve according to the coal quality and the system output condition; and (5) adjusting a dome valve, and adjusting the gap between a sealing ring of the dome valve and a valve element to be 0.8 mm-1. 4mm. The method is used for improving the output of the positive-pressure dense-phase ash conveying system and optimizing the ash conveying operation.

Description

technical field [0001] The invention relates to a method for increasing the output of a positive pressure dense phase ash conveying system and optimizing the ash conveying operation. Background technique [0002] At present, in the existing technology, the design ash output guarantee value of the first electric field of the electrostatic precipitator is 55.5 tons per hour, and the design output margin is small, while the maximum ash output of the first electric field is 57.5 tons, so it cannot meet the production needs. In addition, when the ash conveying system of an electric field is overhauled, the ash conveying system needs to be stopped, and the ash hopper is easily filled with ash, causing the short-circuit trip of the electric field, which seriously affects the operation rate and efficiency of the electric dust removal electric field. In addition, the coal quality in recent years is poor and the ash content is large 1. The ash matter is poor and the particle size is l...

AI Technical Summary

Problems solved by technology

[0002] At present, in the existing technology, the design guarantee value of ash delivery in the first electric field of the electrostatic precipitator is 55.5 tons per hour, and the design output margin is small, while the maximum ash output of the first electric field is 57.5 tons, so it cannot meet the production needs

In addition, when the ash conveying system of an electric field is overhauled, the ash conveying system needs to be stopped, and the ash hopper is easily filled with ash, causing the short-circuit trip of the electric field, which seriously affects the operation rate and efficiency of the electric dust removal electric field. In addition, the coal quality in recent years is poor and the ash content is large , Poor ash matter and large particle size, resulting in difficulty in ash transportation, seriously affecting the safe operation of the dry ash removal system, and seriously affecting the operation rate and efficiency of the electric dust removal field