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A device and method for graded utilization of low-rank coal and biomass based on chemical chain

A low-rank coal and biomass technology, applied in chemical instruments and methods, chemical/physical processes, gasification processes, etc., can solve problems such as limited industrial applications, expensive hydrogen sources, and difficulty in recycling catalysts to reduce dust content Quantity, improve the effect of quality

Active Publication Date: 2020-09-29
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with traditional pyrolysis, catalytic pyrolysis and hydropyrolysis can adjust the quality of pyrolysis products. However, catalytic pyrolysis has difficulties in recycling catalysts, and hydropyrolysis has problems such as expensive hydrogen sources, which limit its industrial application.

Method used

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  • A device and method for graded utilization of low-rank coal and biomass based on chemical chain
  • A device and method for graded utilization of low-rank coal and biomass based on chemical chain
  • A device and method for graded utilization of low-rank coal and biomass based on chemical chain

Examples

Experimental program
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Effect test

Embodiment 1

[0025]The main structure of the chemical chain-based low-rank coal and biomass graded utilization device described in this embodiment includes a main structure including a cyclone separator I 1, a gasification reactor 2, a stocker 3, a material control valve 4, a material leg 5, Jet pipe I 6, jet pipe II 7, return valve 8, flow control valve I 9, gas distribution plate I 10, gas distribution chamber I 11, solid slag outlet 12, cyclone separator III 13, cyclone separator II 14, Two-stage air reactor rapid lifting section 15, distributor 16, flow control valve II 17, two-stage air reactor dense phase section 18, gas distribution plate II 19, gas distribution chamber II 20, two-stage pyrolysis The fast descending section 21 of the reactor, the dense phase section 22 of the two-stage pyrolysis reactor, the gas-liquid separator 23, the quenching heat exchanger 24, the gas distribution plate III 25 and the gas distribution chamber III 26; the stocker 3 passes through the material con...

Embodiment 2

[0035] In this example, the device and method described in Example 1 are adopted, the Ca-Fe composite oxygen carrier is used as the oxygen carrier, and Zhaotong lignite is used as the reactant. The industrial analysis and elemental analysis of Zhaotong lignite are shown in Table 2, and the reduced Ca-Fe Composition distribution of liquid phase products of pyrolysis reaction between composite oxygen carrier and Zhaotong lignite see Figure 5 , Composition of syngas generated from gasification reaction between oxidized Ca-Fe composite oxygen carrier and Zhaotong lignite pyrolysis coke Image 6 ,

[0036] Table 2: Industrial analysis and elemental analysis of Zhaotong lignite (air-dried basis)

[0037]

[0038]

[0039] Depend on Figure 5 It can be seen that compared with conventional lignite pyrolysis, the addition of oxygen carrier plays an important role in adjusting the composition of the pyrolysis liquid phase, greatly increasing the relative content of benzene, tol...

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Abstract

The invention belongs to the technical field of graded utilization of low-rank coals and biomasses and specifically relates to a graded utilization device and method for low-rank coals and biomasses based on chemical chains. A reduced oxygen carrier and low-rank coal particles or biomass particles are mixed to be subjected to a rapid pyrolysis reaction, and the reduced oxygen carrier generates anoxidized oxygen carrier; pyrolysis cokes, the oxidized oxygen carrier and a pyrolysis gas-liquid phase product are separated at the dense phase stage of a two-stage pyrolysis reactor; the pyrolysis cokes and the oxidized oxygen carrier obtained by separation and an oxidized oxygen carrier from an air reactor simultaneously enter a gasification reactor for a gasification reaction, and the oxidizedoxygen carrier is reduced into the reduced oxygen carrier; and the reduced oxygen carrier respectively enters a two-stage air reactor and the two-stage pyrolysis reactor through a distributor. In thewhole process, the graded and efficient recycle of solid carbon-containing raw materials with relatively high volatile components such as the low-rank coals and the biomasses is realized, and meanwhile, pyrolysis reaction control, gradient utilization of energy and internal separation of a reaction product are realized.

Description

Technical field: [0001] The invention belongs to the technical field of graded utilization of low-rank coal and biomass, and specifically relates to a device and method for graded utilization of low-rank coal and biomass based on chemical chains, which is suitable for low-rank coal including lignite, bituminous coal, terrestrial biomass, and marine biomass. The graded utilization process of biomass and other biomass containing high volatile solid carbonaceous raw materials. Background technique: [0002] The clean, high-efficiency, and low-carbon conversion of carbon-containing solid fuels such as coal and biomass is an inevitable path for the sustainable development of energy and the environment in my country. Due to the low coalification degree, low calorific value and high volatile content of low-priced coal, direct combustion or gasification efficiency is low, and its resource value cannot be fully utilized. Biomass also has the characteristics of low calorific value an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/26C10J3/58
CPCC10J3/58C10J2300/0986
Inventor 刘永卓赵书菊张欣涛刘涛郭庆杰
Owner QINGDAO UNIV OF SCI & TECH
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