Steam Separation Unit Pressure Lock via Dilution Liquid
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Solution Overview
Problem
In hydrolysis systems for lignocellulosic biomass, existing steam separation units face challenges in maintaining a satisfactory pressure lock, particularly with biomass materials lacking interior structure and low network strength, leading to risks of blow-back and equipment damage.
Innovation Solution
A steam separation unit that combines steam separation and dilution using biomass dilution liquid as a pressure lock, featuring a vessel with a separation section and a biomass collection section, where the dilution liquid controls the pressure and prevents blow-back by maintaining a pressure lock even for sticky materials with low network strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional steam separation unit is used, then steam separation can be achieved, but the pressure lock is insufficient for biomass material with low network strength, leading to blow-back risk
Solution Approach 1:
The patent combines the steam separation function and dilution function into a single integrated unit. The biomass collection section serves dual purposes: collecting separated biomass and providing pressure lock through liquid sealing. This merging eliminates the need for separate pressure lock mechanisms and dilution equipment, while ensuring reliable pressure containment for low network strength biomass materials.
Solution Approach 2:
The liquid in the biomass collection section acts as an intermediary medium that provides pressure lock by forming a seal between the high-pressure steam separation zone and the lower-pressure discharge zone. This liquid barrier prevents blow-back of biomass material while allowing controlled discharge, effectively mediating the pressure differential without requiring complex mechanical pressure lock devices.
2Productivity
If steam separation is performed in separate steps with intermediate feeding, then processing can be continued, but equipment complexity increases and pressure lock becomes more difficult to maintain
Solution Approach 1:
The patent merges multiple process functions into a single vessel: steam separation occurs in the separation section while biomass collection and dilution occur in the collection section. The liquid-filled collection section continuously provides pressure lock, enabling uninterrupted operation without intermediate feeding stages or additional pressure containment equipment.
Solution Approach 2:
The biomass collection section performs multiple functions simultaneously: it collects separated biomass material, provides continuous pressure lock through liquid sealing, and prepares material for discharge. This multi-functionality eliminates the need for separate dedicated components for each function, simplifying the overall system while maintaining continuous processing capability.
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 solution effectively prevents blow-back and ensures safe processing of biomass with varying viscosities by using dilution liquid as a pressure lock, maintaining a stable pressure environment during steam separation and dilution, thereby protecting equipment and ensuring process continuity.
Implementation Method 1
The separation section is arranged with at least one inlet for receiving at least partly hydrolyzed biomass material mixed with steam
Implementation Method 2
The biomass collection section is filled at least partly with liquid during operation and arranged to collect the biomass material after separation from steam
Data Source
AI summary
A steam separation unit for separation of steam from lignocellulosic biomass material in a hydrolysis process includes a treatment vessel including a separation section and a biomass collection section. The separation section is arranged with at least one inlet for receiving at least partly hydrolyzed biomass material mixed with steam and at least one control outlet for discharging the steam from the vessel. A biomass collection section arranged to be filled at least partly with liquid during operation and coupled to the separation section to collect the biomass material after separation from steam, wherein the biomass collection section includes a mixing element for mixing the biomass material with liquid and at least one control valve for discharging biomass material mixed with liquid. A system for hydrolysis of lignocellulosic biomass material including such a separation unit is also presented.