Pressurized Fluidized Bed Impurity Conveying Valve

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Solution Overview

Problem

Conventional methods for conveying impurities in pressurized fluidized bed incinerator systems face issues with valve malfunction and seal wear due to impurity attachment, leading to flue gas leakage and corrosion, complicating the process and reducing valve lifespan.

Innovation Solution

A method involving an apparatus with upper and lower valves that utilize cleaning gases to remove impurities before discharge, managing pressure to prevent abrasion and leakage, and using combustion air to increase tank pressure without additional devices, thereby ensuring efficient and stable impurity conveyance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional valves are used to convey impurities in pressurized fluidized bed incinerator systems, then the impurity discharge function is provided, but impurities attach to or enter into the valve body and seal part causing valve malfunction and seal wear

Engineering Contradiction:

Improvevalve operation reliabilityVSAvoidimpurity attachment and abrasion

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A cleaning gas supply mechanism is installed to blow cleaning gas into the valve body and seal part before impurity discharge. This preliminary cleaning action removes impurities that would otherwise attach to or enter the valve components, preventing malfunction and seal wear while maintaining reliable valve operation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The harmful effect of impurities causing valve damage is converted into a manageable process by introducing cleaning gas. The cleaning gas flows through the valve components, using the same impurity discharge pathway to simultaneously clean and protect the valve, turning a harmful situation into a protective mechanism

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Reliability

If intermediate hopper, sealing valve and dust separating rotary valve are provided for conveying dusts, then dust conveyance is achieved, but the apparatus becomes complicated and large

Engineering Contradiction:

Improvedust conveyance reliabilityVSAvoidapparatus structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple functions (dust conveyance, pressure equalization, sealing, and cleaning) are merged into a single integrated valve structure. The valve body incorporates internal passages for cleaning gas supply and pressure equalization, eliminating the need for separate intermediate hoppers, sealing valves, and dust separating rotary valves while maintaining reliable dust conveyance

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The valve is designed as a multi-functional component that simultaneously performs dust conveyance, pressure equalization, sealing, and self-cleaning operations. This universal design consolidates what would traditionally require multiple separate devices into one compact unit, reducing apparatus complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Stability of the object's composition

If pressure equalization is performed using multiple valves and pipes, then pressure balance is achieved, but the system requires more components and increased complexity

Engineering Contradiction:

Improvepressure balance stabilityVSAvoidpressure equalization system complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Pressure equalization function is merged into the valve body structure itself through internal passages and chambers. The valve incorporates pressure equalization ports and internal flow paths that automatically balance pressure differences during operation, eliminating the need for separate pressure equalization pipes and additional valves

Inventive Principle:

Principle #5Merging (Combining)

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 approach prevents valve malfunction, reduces maintenance needs, and prevents flue gas leakage and corrosion, ensuring efficient and long-term operation of the conveying system.

Implementation Method 1

supplying a cleaning gas to the upper valve

Methodology Applied

Scientific EffectGas flow:

Implementation Method 2

driving the upper discharge device so as to discharge the impurities from the dust collector to the tank

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Implementation Method 3

a high pressure ash tank for receiving the ash under a maintained high pressure state of the flue gas

Methodology Applied

Scientific EffectPressure maintenance: Pressurisation

Implementation Method 4

using combustion air to increase tank pressure without additional devices

Methodology Applied

Scientific EffectGas compression: Gas Compressor

Implementation Method 5

seal part and the like... prevent flue gas leakage

Methodology Applied

Scientific EffectSealing:

Data Source

PatentUS10001277B2Method for conveying impurities in pressurized fluidized bed incinerator system

Publication Date: 2018.06.19 SANKI ENG CO LTD

AI summary

A method for efficiently conveying impurities in a pressurized fluidized incinerator system is provided. Cleaning gas is supplied to an upper valve, and thereafter, the upper valve is driven so as to communicate an upper discharge device and a tank. The upper discharge device is driven so as to convey the impurities from the dust collector to the tank, and thereafter, the upper discharge device is stopped and the upper valve is driven so as not to communicate the upper discharge device and the tank. Thereafter, the supply of the cleaning gas to the upper valve is stopped.