Feed System

a biogenic feedstock and feed technology, applied in the field of biogenic feedstock feeding systems, can solve the problems of high process control cost, unsuitable gasifier types, and high acquisition cost of process engineering, and achieve the effect of preventing the backflow of bed material

Inactive Publication Date: 2009-07-09
SPIRIT OF TECH
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  • Description
  • Claims
  • Application Information

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Benefits of technology

[0031]When the gasifier is operating the material is fed into a dense, fluidized bed. Measures are taken to prevent the backflow of bed material into the plug screw when the feed screw is at a standstill, particularly in the start up and shut down processes. To this end, the system is equipped with a gate valve...

Problems solved by technology

These types of gasifier are completely unsuited to the gasification of biomass (which occurs regionally and has a significant influence on the costs in terms of logistics and processing) because of the gre...

Method used

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Embodiment Construction

[0044]The control concept comprises the specification by the volume of synthesis gas for metering the feedstock through regulated discharge from a buffer and speed-regulated metering screws with monitoring of the fill level of the supply chutes, distribution to the feed devices and formation of the shut-off plugs in the speed-regulated feed screws, with their speed being regulated by the master controller and the fill level monitoring in the supply to the feed system. This feed system (for solids) constitutes substantial progress in fluidized bed gasification.

[0045]The discharge system 1 (FIG. 1) comprises a screw 3, the rotation speed of which is regulated by the master controller 2, and which is mounted centrally in the buffer bunker 4. The entire screw is moved over the silo base by means of a rotary drive 5, itself also speed-regulated. Speed regulation is configured such that the fill level of this screw is maintained at a constant level by the screw turning into the material h...

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Abstract

Transport system for the introduction of biomass into a gasifier comprising: a plug screw that forces the biomass into the gasifier, wherein the plug screw is formed such that the biomass is compressed in order on the one hand for it to be conveyed against a pressure in the gasifier and, on the other hand, to leave the gas and bed material in the gasifier, having a gate valve adjacent to the plug screw and which closes when the plug screw stops so that heat, vapour and gas cannot escape.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of PCT / EP2007 / 058034 filed Aug. 2, 2007, which claims priority of DE 10 2006 039 622.7 filed Aug. 24, 2006, both of which are incorporated by reference.FIELD OF THE INVENTION[0002]The invention concerns a system for feeding biogenic feedstock into a gasifier, more particularly into a pulse gasifier in accordance with applications DE 10 2006 022 265.2, DE 10 2006 017 355.4, DE 10 2006 017 353.8.BACKGROUND[0003]The development of thermal gasification processes has produced essentially three different types of gasifier, the entrained flow gasifier, the fixed bed gasifier and the fluidized bed gasifier.[0004]Originally, the fixed bed gasifier and the fluidized bed gasifier were developed for the commercial gasification of biomasses.[0005]The Carbo-V method will be illustrated here by way of an example for the many different technical approaches to fixed bed gasification.[0006]Literature for fluidized bed gas...

Claims

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Application Information

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IPC IPC(8): C10J3/30C10J3/46
CPCC10J3/503C10J2300/1261C10J2200/158C10J3/723
Inventor NEUMANN, OLIVER
Owner SPIRIT OF TECH
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