Gasification Solid Discharge Lock Containers
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Solution Overview
Problem
Existing methods for discharging solids from gasification processes, such as coal gasification, face issues with intermittent discharge leading to high device load, bridging on valves, and the need for additional volume within the pressure vessel, which results in operational disruptions and reduced throughput.
Innovation Solution
A method and device that alternately connect and disconnect two lock containers to the water bath, using a continuous flow of liquid to support solid settling and divert solids flow, eliminating the need for an intermediate container and reducing valve blockages by maintaining a solids-free medium during switching, thus increasing throughput without altering upstream or downstream system components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solids are discharged intermittently by means of a lock container, then the discharge process can be controlled, but the devices experience high load during discharge and require additional volume within the pressure vessel
Solution Approach 1:
The lock container is divided into multiple compartments, each capable of holding and discharging solids independently. This segmentation allows continuous discharge operation while reducing the volume requirement for each compartment and distributing the load over time, thereby increasing overall solids throughput without requiring additional total volume within the pressure vessel.
2Ease of operation
If the lock container is disconnected by means of valves, then the lock container can be emptied, but bridging occurs on the valves leading to operational problems
Solution Approach 1:
A water seal is introduced as an intermediary medium between the lock container and the discharge system. The water seal prevents direct contact between solids and the valve mechanism, eliminating bridging and blockage problems while allowing smooth emptying of the lock container. The water acts as a mediator that carries solids through the discharge process without allowing them to adhere to or bridge on the valves.
3Reliability
If an intermediate container is used to accommodate solids during discharge, then the discharge process can be managed, but the device complexity increases
Solution Approach 1:
The lock container is designed to perform multiple functions: it serves as both the holding vessel for solids and the discharge mechanism itself. The multiple compartments within the lock container can operate independently, with each compartment functioning as both storage and discharge unit. This eliminates the need for separate intermediate containers while maintaining reliable discharge management and reducing overall device complexity.
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 allows for continuous and efficient discharge of solids with reduced risk of valve blockages, enabling higher solids throughput without additional volume requirements within the pressure vessel, thereby enhancing operational reliability and efficiency.
Implementation Method 1
a flow of liquid supporting the settling of solids inside the lock container is discharged from the lock container connected to the pressure vessel
Implementation Method 2
solids emerging from a pressure vessel are discharged by gravity into a water bath still housed in the pressure vessel
Data Source
Figure 1
AI summary
The invention relates to a method for removing clinker and ashes from a gasification reactor, said solids being conveyed from the gasification reactor to a water bath which is present along with the gasification reactor in a pressure vessel, at least two removal containers being present below the water bath. The removal containers are supplied with a water/solid flow via a conduit and a distributor. The removal containers can be supplied with a water/solid flow individually and in a controlled manner via shut-off devices, the filling of the containers being controlled in such a manner that the process of deposition is promoted by withdrawing a liquid flow from the filling removal container and the filling is time-controlled in such a manner that the solids are prevented from being deposited upstream of the valves and the removal containers. The invention also relates to a device comprising at least two removal containers below the water bath of a gasification reactor, a distributor and shut-off devices being mounted between the water bath and the removal containers in a preferred embodiment.