White Plume Control Line for Wet Desulphurization Smoke

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Solution Overview

Problem

Current methods fail to effectively determine a white plume control line for smoke after wet desulphurization, leading to visual pollution and haze formation due to uncontrolled smoke temperature and humidity, which varies by region and season.

Innovation Solution

A method involving the creation of a saturated air enthalpy humidity curve and tangent lines to determine a control line based on meteorological data, allowing for temperature and humidity regulation to prevent white plume formation, with the goal of achieving a 100% white-plume-free day number control line.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If smoke temperature is reduced to improve energy efficiency, then energy consumption decreases, but white plume formation increases causing visual pollution

Engineering Contradiction:

Improveenergy consumptionVSAvoidwhite plume formation

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting smoke temperature and humidity parameters based on meteorological conditions. The control system modifies emission parameters (temperature, humidity) to stay below the white plume control line on the enthalpy humidity diagram, eliminating visual pollution while optimizing energy consumption.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by creating a dynamic control system that continuously monitors meteorological data and adjusts smoke emission parameters in real-time. The white plume control line is dynamically calculated based on changing environmental conditions, allowing flexible optimization of both energy efficiency and visual pollution control.

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If smoke temperature and humidity are controlled to eliminate white plume, then visual pollution is reduced, but operation costs increase

Engineering Contradiction:

Improvevisual pollutionVSAvoidoperation costs

Core Design Contradiction:

Object-affected harmful factorsVSLoss of energy

Solution Approach 1:

The patent applies self-service by utilizing free meteorological data (temperature, humidity, pressure) from environmental monitoring systems to calculate the white plume control line. This external information serves the system without additional cost, enabling optimization of energy consumption while maintaining visual pollution control.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements partial action by controlling smoke parameters only to the extent necessary to eliminate white plume formation. Rather than maintaining fixed high temperatures, the system applies minimal necessary heating or cooling to stay below the control line, reducing energy waste while achieving the visual pollution control goal.

Inventive Principle:

Principle #16Partial or excessive action

3Ease of operation

If fixed temperature control is applied to prevent white plume, then de-pluming effect is simplified, but adaptability to different meteorological conditions deteriorates

Engineering Contradiction:

Improvecontrol simplicityVSAvoidmeteorological adaptability

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent applies feedback by continuously monitoring meteorological parameters (temperature, humidity, pressure) and using this information to dynamically adjust smoke emission control settings. The white plume control line calculation incorporates real-time environmental data, creating a closed-loop system that adapts to changing conditions while maintaining straightforward operational procedures.

Inventive Principle:

Principle #23Feedback

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 method allows for scientific determination of a de-pluming control line, reducing operation costs and improving de-pluming effects by optimizing condensing-temperature rise processes based on practical meteorological and smoke emission parameters.

Implementation Method 1

the smoke after wet desulphurization has low temperature, and saturated wet smoke forms several hundred meters or even several kilometers of white plume in a process of being in contact with environment air and gradually cooling

Methodology Applied

Scientific EffectCondensation: Condensation

Implementation Method 2

drawing a saturated air enthalpy humidity curve or an equivalent curve

Methodology Applied

Scientific EffectEnthalpy humidity relationship:

Data Source

PatentUS11520078B2Method for determining white plume control line of smoke after wet desulphurization

Publication Date: 2022.12.06 NANJING TECH UNIV

AI summary

Determining a white plume control line of smoke after wet desulphurization includes: drawing a saturated air enthalpy humidity curve or equivalent; obtaining annual temperature and humidity change data of located cities or regions along with the time at the frequency of at least one datum every day; drawing the data obtained in the saturated air enthalpy humidity curve; and drawing a tangent line on the saturation curve by using each meteorological point in a chart, the right lower side of the tangent line is a de-pluming control region, the de-pluming effect superior to that at the feature meteorological point can be realized when the smoke enters the region after regulation, a region defined by the de-pluming control line and the saturation curve at a low-temperature side forms a de-pluming day number control region, and the point number falling within the region is the white plume generating day number.