Membrane Dust Collector for Salt Agglomeration in Incineration Exhaust
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Solution Overview
Problem
High-concentration salt-containing organic waste liquid incineration tail gas treatment leads to inorganic salt agglomeration in dust removal equipment, increasing running resistance and reducing the service life of bag-type dust collectors due to crystallization and humidity-induced adhesions.
Innovation Solution
A membrane system with a cylindrical dust collector and anti-caking agents is introduced, utilizing a dust collecting membrane with small pore size and high porosity to prevent salt particles from entering the filter material, and an insulating heating device to reduce agglomeration risks, along with a cylindrical design to minimize salt accumulation at edges and corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inorganic salt is removed from the tail gas through conventional dust removal equipment, then dust removal function is achieved, but inorganic salt agglomerates in the equipment increasing running resistance
Solution Approach 1:
The patent changes the temperature parameter by introducing a heating device to maintain the tail gas temperature above the dew point, preventing inorganic salt condensation and agglomeration in the dust removal equipment while maintaining effective dust removal operation
Solution Approach 2:
The patent introduces an anti-caking agent as an intermediary substance that is sprayed into the tail gas to coat inorganic salt particles, preventing them from agglomerating on equipment surfaces while allowing continuous dust removal operation
2Productivity
If inorganic salt is trapped by the bag filter during vacuum suction, then dust removal efficiency is improved, but salt crystals form on and inside the filter material causing it to become hard and brittle
Solution Approach 1:
The patent changes the temperature parameter by heating the tail gas to prevent inorganic salt condensation on the filter material, avoiding crystal formation that would cause the filter to become hard and brittle
Solution Approach 2:
The patent introduces an anti-caking agent as an intermediary that coats inorganic salt particles before they reach the filter material, preventing salt crystal formation on and inside the filter while maintaining dust removal efficiency
3Ease of manufacture
If the dust collector uses a conventional square structure, then manufacturing is simplified, but inorganic salt accumulates at edges and corners causing agglomeration
Solution Approach 1:
The patent changes the dust collector structure from a square shape to a cylindrical shape, eliminating edges and corners where inorganic salt would accumulate and agglomerate, while the manufacturing complexity remains acceptable
4Loss of energy
If the tail gas is cooled through the heat exchanger, then energy recovery is achieved, but inorganic salt condenses and agglomerates in subsequent equipment
Solution Approach 1:
The patent modifies the temperature parameter by introducing a heating device that compensates for the cooling effect of the heat exchanger, maintaining the tail gas temperature above the dew point to prevent inorganic salt condensation while still allowing energy recovery operation
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
The membrane system effectively prevents inorganic salt agglomeration, prolongs the service life of filter materials, reduces running resistance, and enhances dust removal efficiency, achieving over 99.9% efficiency and lower operational costs.
Implementation Method 1
utilizes the small pore size and high porosity of the dust collecting membrane to prevent inorganic salt particles from entering the internal of the filter material
Implementation Method 2
an insulating and heating device is installed. The gas containing inorganic salt enters the interior of the dust collector along the tangential direction of the box and swirls along the inner wall of the dust collector under the action of the centrifugal force and is heated by the heating device
Implementation Method 3
The gas containing inorganic salt enters the interior of the dust collector along the tangential direction of the box and swirls along the inner wall of the dust collector under the action of the centrifugal force
Data Source
AI summary
A membrane method processing system and process for a high-concentration salt-containing organic waste liquid incineration exhaust gas is described. The system consists essentially of a waste liquid incinerator (I), a gas-solid separator (II), a heat exchanger (III), an air blower (IV), an anti-caking agent storage tank (V), a membrane method dust cleaner (VI), an induced draft fan (VII), a check valve (VIII), and a desulfurization tower (IX). The present invention introduces the dust collecting membrane into the tail gas treatment system and utilizes the small pore size and high porosity of the dust collecting membrane to prevent inorganic salt particles from entering the internal of the filter material and agglomerating there. When the humidity of the gas entering the dust collector increases during the dust removing process, the anti-caking agent is also introduced into the tail gas treatment system to change the surface structure of the inorganic salt crystal to prevent the crystal from agglomeration.