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A combined internal and external heating fluidized bed pyrolysis gasification system with multiple feed ports and multiple seals

A technology of pyrolysis gasification, internal and external heating, applied in granular/powder fuel gasification, gasification process, gasification device details, etc., can solve the problems of low tar and pollutant content, low cost and high calorific value, Achieve the effect of reducing tar content, increasing calorific value, and optimizing feeding system

Active Publication Date: 2018-10-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The incineration of garbage and other wastes is easy to produce pollutants such as dioxins, which has been plagued by the waste treatment industry
[0003] Pyrolysis gasification technology has developed rapidly at home and abroad in recent years, but none of them can meet the requirements of low tar and pollutant content, high calorific value, and low cost at the same time.

Method used

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  • A combined internal and external heating fluidized bed pyrolysis gasification system with multiple feed ports and multiple seals
  • A combined internal and external heating fluidized bed pyrolysis gasification system with multiple feed ports and multiple seals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] See figure 1 , the system includes a material feeding unit 1, a fluidized bed pyrolysis gasification unit 2, a cyclone separator, a cyclone separator feeding pipe, a non-mechanical sealing valve 13, a non-mechanical valve circulation return device 16, and a sequentially connected connection. Unloading valve 14 and solid product collection tank 15, the system generates synthesis gas or pyrolysis gas; the fluidized bed pyrolysis gasification unit 2 includes riser 4, riser inlet system 3 and heater 5, riser inlet The gas system 3 is communicated with the riser 4 through a pipeline; the material feeding unit 1 includes a double-valve lock hopper feeder 7, a rotary valve feeder 8, a screw conveyor 6, a double-valve lock hopper feeder 7 and The screw conveyor 6 is communicated and connected, the screw conveyor 6 is communicated with the riser pipe 4, the non-mechanical valve circulation return device 16 is communicated with the riser pipe 4, and the rotary valve feeder 8 is c...

Embodiment 2

[0033] See figure 1 , The difference between this embodiment and Embodiment 1 is: there is a heater 5 outside the riser 4 of the fluidized bed pyrolysis gasification unit 2, the heater 5 is a microwave heater, and the riser 4 housing is made of ceramics or quartz The pipe material is suitable for microwave pyrolysis and gasification; the double-valve lock hopper feeder 7 and the screw conveyor 6 of the material feeding unit 1 directly transport agricultural and forestry waste (such as orange stalks, etc.) to the riser 4, and the rotary valve feeds The feeder 8 adds the discarded iron rust to the recycling device 16 . Other system components are the same as in Embodiment 1.

Embodiment 3

[0035] See figure 2 The difference between this embodiment and Embodiment 1 is that there is a heater 5 outside the riser 4 of the fluidized bed pyrolysis gasification unit 2, the heater 5 is an electric heater, and the riser 4 housing is made of carbon steel or Stainless steel or other heat-resistant steel. An L-shaped non-mechanical seal valve 13 and a screw conveying extrusion type circulation return device 16 are used between the riser 4 and the discharge pipe of the cyclone separator to realize multi-seal combination to ensure that the riser 4 and the discharge pipe 11 and There is no cross-gas between 12. Other system components are the same as in Embodiment 1.

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Abstract

The invention discloses a multiple-feeding-port and multiple-seal combined internal and external heating fluidized bed pyrolysis and gasification system, and belongs to the technical field of waste pyrolysis and gasification. The system comprises a material feeding unit, a fluidized bed pyrolysis and gasification unit, a cyclone separator, a cyclone separator discharging pipe, a circulating returning device, a discharging valve and a solid product collecting tank. The material feeding unit comprises a double-valve locking hoper feeder, a rotary valve feeder and a screw conveyor. The fluidized bed pyrolysis and gasification unit comprises a gas inlet system, a lifting pipe and a heater. Materials are added through the bottom and upper portion of the lifting pipe and the upper portion of the circulating returning device, and one or more non-mechanical valves or mechanical valves or screw conveying devices are adopted between the lifting pipe and the cyclone separator discharging pipe to ensure material sealing between the lifting pipe and the discharging pipe. An electro-magnetic induction or microwave or electric heating and efficient heat preservation layer is adopted on the outer portion of the lifting pipe. The overall pyrolysis and gasification efficiency and the product gas heat value are greatly improved, the tar content of product gas is reduced, and no dioxin or other pollutants are contained in the product gas.

Description

technical field [0001] The invention relates to an internal and external heating fluidized bed pyrolysis and gasification system, which belongs to the technical field of waste pyrolysis and gasification, in particular to an internal and external heating fluidized bed pyrolysis and gasification system combined with multiple feed ports and multiple seals . Background technique [0002] Energy is the basis for the survival and development of modern society. China's current energy supply situation is severe and environmental problems are serious. The development of clean and renewable energy has become an urgent issue. Agricultural, forestry and garbage and other wastes are low-carbon energy sources. China has abundant resources of agricultural, forestry and garbage and other wastes. Its research and development, promotion and popularization will help reduce pollutant emissions and improve the ecological environment. Municipal, river and industrial sludge are also solid wastes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/56C10J3/58C10J3/72C10J3/84C10B53/02
CPCC10B53/02C10J3/56C10J3/58C10J3/72C10J3/84C10J2200/154C10J2300/0916C10J2300/0946C10J2300/0956C10J2300/123C10J2300/1246C10J2300/1276Y02E50/10Y02P20/10
Inventor 代建军李晶
Owner BEIJING UNIV OF CHEM TECH