Electrostatic Precipitator Flushing Device for Electrode Cleaning

Solution Overview

Problem

Existing electrostatic precipitators face challenges in maintaining efficient particle separation due to deposit buildup on the spray electrode, leading to reduced precipitation output and potential electrical breakdowns, with current cleaning methods requiring excessive flushing liquid and causing leakage currents.

Innovation Solution

The electrostatic precipitator incorporates a flushing device that directs a reduced amount of flushing liquid across the spray electrode's head region, using a cup element with flow resistance to create a controlled flushing stream that efficiently removes deposits, reducing the need for frequent manual cleaning and minimizing leakage currents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple spray nozzles are used to clean the precipitator interior, then deposits on electrodes can be removed, but a large amount of cleaning liquid is consumed and fine droplets cause leakage currents

Engineering Contradiction:

Improveprecipitation outputVSAvoidcleaning liquid

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The invention extracts and removes only the necessary cleaning function from the general spray system. A dedicated cleaning device is positioned to deliver cleaning liquid directly to the spray electrode area, eliminating the need for multiple spray nozzles throughout the precipitator interior. This targeted approach removes deposits effectively while consuming minimal cleaning liquid.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The cleaning device acts as an intermediary between the cleaning liquid supply and the spray electrode. It controls the delivery of cleaning liquid precisely where needed, preventing unnecessary dispersion of liquid throughout the precipitator and avoiding the generation of fine droplets that would cause leakage currents.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If multiple spray nozzles are used to clean the precipitator interior, then deposits on electrodes can be removed, but fine droplets are generated that lead to leakage currents and breakdowns

Engineering Contradiction:

Improveprecipitation outputVSAvoidleakage currents

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts and removes only the necessary cleaning function from the general spray system. A dedicated cleaning device is positioned to deliver cleaning liquid directly to the spray electrode area, eliminating the need for multiple spray nozzles throughout the precipitator interior. This targeted approach removes deposits effectively while consuming minimal cleaning liquid.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The cleaning device acts as an intermediary between the cleaning liquid supply and the spray electrode. It controls the delivery of cleaning liquid precisely where needed, preventing unnecessary dispersion of liquid throughout the precipitator and avoiding the generation of fine droplets that would cause leakage currents.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the spray electrode is cleaned frequently with large amounts of liquid, then deposits are removed, but the cleaning time and complexity increase

Engineering Contradiction:

Improveprecipitation outputVSAvoidcleaning time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The cleaning device is designed to deliver cleaning liquid directly to the spray electrode before deposits can significantly accumulate and affect precipitation performance. This preliminary cleaning action prevents heavy buildup, reducing the frequency and duration of cleaning operations required to maintain optimal precipitation output.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design reduces the amount of flushing liquid required, decreases cleaning time, and enhances precipitation efficiency by targeting deposits at discharge points, while minimizing the formation of conductive films and preventing electrical breakdowns.

Implementation Method 1

At least one high-voltage electrode is provided in the precipitator for generating a corona discharge in the exhaust gas flow in order to effect the electric charging of the materials to be separated

Methodology Applied

Scientific EffectCorona discharge: Corona Discharge

Implementation Method 2

the electrostatic precipitator has a flushing device, which is designed to direct the flushing liquid across a head region of the spray electrode as a flushing stream

Methodology Applied

Scientific EffectFluid flow:

Data Source

PatentUS10926272B2Electrostatic precipitator and method for electrostatic precipitation of materials out of an exhaust gas flow

Publication Date: 2021.02.23 DAS ENVIRONMENTAL EXPERT

AI summary

An electrostatic precipitator (1) to precipitate one or more materials (9) out of an exhaust gas flow (5) has a spray electrode (2) having an active part (14) for generating a corona discharge (6) and a flushing liquid supply (21), by means of which flushing liquid (10) is supplied into the precipitator (1) for removing deposits (11), made of the material(s) (9) to be separated, that settle on the spray electrode (2). The precipitator (1) uses less cleaning liquid and the cleaning is carried out more reliably. For this purpose, a flushing device (8) directs the flushing liquid (10) across a head region (12) of the spray electrode (2) onto the active part (14) of the spray electrode (2) as a flushing stream (22).