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Three-bed combination pyrolysis gasification and tar cracking integrated system for solid waste

A solid waste, pyrolysis gasification technology, applied in gasification process, gasification device feeding tool, coke oven and other directions, can solve the problem of high tar content, hindering commercial promotion and application, low calorific value of product gas problems, to achieve the effect of reducing emission content, increasing stability and flexibility of operation, and improving adaptability

Active Publication Date: 2016-08-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of pyrolysis and gasification are the low calorific value and high tar content of the product gas, which hinders further commercial promotion and application

Method used

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  • Three-bed combination pyrolysis gasification and tar cracking integrated system for solid waste
  • Three-bed combination pyrolysis gasification and tar cracking integrated system for solid waste
  • Three-bed combination pyrolysis gasification and tar cracking integrated system for solid waste

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Effect test

Embodiment 1

[0030] See figure 1 As shown, the present invention is a solid waste three-bed combined pyrolysis gasification and tar cracking integrated system, which has a solid waste feeding system 1, a pyrolyzer 2, an oxidizer system 3, and an oxidizer cyclone separator and a cyclone reactor, wherein the solid waste feed system 1 is communicated with the pyrolyzer 2; the bottom output port of the pyrolyzer 2 is connected with a mechanical valve or a screw conveying system or a non-mechanical valve pipeline (such as a circulation return pipe 15) The oxidizer system 3 is connected; the output end of the oxidizer system 3 is connected with the input end of the oxidizer cyclone separator, the output end of the oxidizer cyclone separator is connected with the input end of the cyclone reactor through a non-mechanical valve, and the cyclone reactor 10 is connected with the input end of the cyclone separator. The pyrolyzer 2 is connected in communication.

[0031] The oxidizer system 3 is a cir...

Embodiment 2

[0039] See figure 1 As shown, the difference from Implementation 1 is that the circulating fluidized bed oxidizer system 3 adopts the mode of insufficient air supply and insufficient combustion, that is, the operation mode of partial oxidation, and the product gas of the gasifier is syngas, which It includes a riser 4, a settling tube 5 and an air intake system 18 at the bottom thereof in sequence.

Embodiment 3

[0041] See figure 1Shown, the difference with implementing 1 is that cheap industrial waste iron rust (Fe 2 o 3 ), power plant desulfurization gypsum (CaSO 4 ) and other oxygen carriers, the release of lattice oxygen contained in the oxygen carrier promotes the partial oxidation of the pyrolyzer, thereby increasing the temperature of the pyrolyzer, and the fluidized bed pyrolyzer 2 operates in the operating mode of the gasifier, Its product gas is synthesis gas. The circulating fluidized bed oxidizer system 3 operates in complete combustion mode.

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Abstract

The invention discloses a three-bed combination pyrolysis gasification and tar cracking integrated system for solid waste and belongs to the technical field of solid waste treatment. The system comprises a solid waste feeding system, a pyrolyzer, an oxidizer system, an oxidizer cyclone separator and a cyclone reactor. According to the system, the circulating flow of bed materials among three bed is realized by virtue of a circulating fluidized bed oxidizer, a bubbling or turbulent fluidized bed pyrolyzer and the cyclone reactor which are combined with a gas stripping tube and a sedimentation tube, and the adequate mixing between the hot bed materials and pyrolysis gas is realized by virtue of the cyclone reactor, so that the tar cracking and the gas purification are greatly promoted; by virtue of structural optimization of an oxidizer and the pyrolyzer, the mixed use of different bed materials and the improvements of a bed material circulating flow system, the gas-liquid mixing level and a feeding system, the integral pyrolysis gasification efficiency is greatly improved, the heat value of product gas is greatly increased, the tar content of product gas is greatly reduced, and high-quality clean pyrolysis gas / synthesis gas is prepared.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to an integrated system of solid waste three-bed combined pyrolysis gasification and tar cracking. Background technique [0002] With the progress of society and the development of economy, human beings' demand for energy is increasing day by day. Traditional fossil energy is facing the problem of depletion due to its non-renewability. Biomass energy, as a renewable, potentially sustainable, and relatively environmentally friendly clean energy, has received attention at home and abroad in recent years, and it is the fourth energy source in total energy consumption after coal, oil, and natural gas. my country's biomass resources are rich in reserves, but the effective utilization rate is still very low. The total amount of biomass produced every year is more than 5 billion tons, of which there are more than 700 million tons of crop straw and other wastes, and more than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/58C10J3/72C10B53/02
CPCC10B53/02C10J3/58C10J3/72C10J3/723C10J3/725C10J2200/15C10J2300/0916C10J2300/1223C10J2300/1606Y02E50/10
Inventor 代建军李晶
Owner BEIJING UNIV OF CHEM TECH
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