Preparation method and device of thermally cracking biomass into gas in high-temperature and flash mode

Abstract

The invention aims to provide a preparation method and a device of thermally cracking biomass into gas in a high-temperature and flash mode. The preparation method comprises that the biomass is squeezed to exhaust air, the squeezed biomass is dried, the dried biomass is subjected to a volatile matter reaction, an obtained biomass volatile matter compound is subjected to a thermal cracking reaction, and an obtained biomass compound after the thermal cracking reaction is subjected to a secondary thermal cracking reaction so as to convert energy elements in the biomass into the gas. The preparation method and the device of thermally cracking the biomass into the gas in the high-temperature and flash mode can convert energy of the biomass into high-grade energy products to the maximum, does not generate dioxins, a rate of coking and igloss can reach 100 percent, the preparation method and the device of thermally cracking the biomass into the gas in the high-temperature and flash mode fundamentally solves the problem of urban household garbage and discarded biomass, is complete in reduction, clean , and environment-friendly, and generates energy product gas which is high-grade and urgently needed by people for life and production.

Description

technical field [0001] The invention relates to the technical field of biomass regeneration and utilization and its energy gas preparation, in particular to a preparation method and device capable of high-temperature flash pyrolysis of biomass into gas. Background technique [0002] The siege of municipal solid waste and the littering of a large amount of waste biomass seriously restrict the environmental space for human survival and development, especially now that municipal solid waste is incinerated for power generation to produce carbon dioxide and dioxin emissions, coking, low energy conversion efficiency, and composting of municipal solid waste Odor and methane emissions from biogas power generation yards, high polymer plastics in urban domestic waste are difficult to degrade during biogas treatment, white pollution caused by applying fertilizers to fields, and low-temperature and slow-speed (300°C-350°C) production of biomass The charcoal produced by charcoal technolo...

AI Technical Summary

Problems solved by technology

However, this method has many defects. First, the products of rapid pyrolysis of biomass are mainly carbon dioxide, gases such as nitrogen oxides, tar and charcoal and a small amount of H 2 , CO, and C 2 h 4 And other gases, in order to produce hydrogen, it must go through the steam reforming process, and the catalyst must be coordinated to produce hydrogen, and the energy consumption is high.

Second, the production cost of this process is higher than the current production cost of hydrogen, because the temperature of water vapor is controlled, and the input of the catalyst is evenly distributed to contact with carbon dioxide and high-temperature carbon. The control of these processes is more expensive than the current hydrogen production by electrolytic reduction. more complicated

Its three, the secondary pollution of the catalyst after the reaction, brought into the reforming reactor a large amount of nitrogen oxides (accounting for 40% of the total gas volume) is difficult to remove, can only dilute the hydrogen to cause poor purity, and the tar gas produced by pyrolysis ( Accounting for more than 25% of the total gas volume) During the transfer of pyrolysis gas to the reforming reactor, the pipeline will be corroded and blocked, and the environment will be polluted

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