Air-passage multi-tube spiral device for preparing gas through dry distillation and pyrolysis on biomass and process therefor

Abstract

The invention discloses an air-passage multi-tube spiral device and process for preparing gas through dry distillation and pyrolysis on biomass. The device consists of a biomass raw material pre-treatment system, a biomass dry distillation and pyrolysis system, a gas and carbon powder separating and purifying system, a gas conveying and storing system, a carbon powder cooling and collecting system and an afterheat recycling system, wherein the biomass dry distillation and pyrolysis system is provided with a plurality of rows of dry distillation and pyrolysis sleeves; spiral material conveyingdevices and exhaust passages are arranged in each row of dry distillation and pyrolysis sleeves; and a communication pipe is arranged between adjacent dry distillation and pyrolysis sleeves, so the rows of dry distillation and pyrolysis sleeves are connected into an S-shaped pipe in series. The process comprises the following steps of: 1, crushing, drying and conveying a biomass raw material; 2, performing dry distillation and pyrolysis on the biomass; 3, separating and purifying gas and carbon powder; and 4, storing and conveying the gas. The device and the process have the beneficial effects that: the condition the gas flies around to affect the normal production is not caused, mass industrial production can be realized, the production cost is reduced, and low energy consumption is realized.

Description

technical field [0001] The invention relates to a device and process for producing gas by dry distillation and cracking of biomass, in particular to a device and process for producing gas by carbony distillation and cracking of biomass with multi-tube spiral type with air channels. Background technique [0002] At present, with the increasing shortage of fossil energy, new energy production processes and devices that use biomass resources to produce gas to replace petroleum liquefied gas and natural gas are also emerging. The early process and device were gasification devices based on the application of gasification agents, the main disadvantages of which were low calorific value of gas and high tar content. Later, in order to increase the calorific value of gas, intermittent carbonization furnaces appeared again. Although the calorific value increased, the large amount of tar produced could not be cracked effectively, which became a bottleneck restricting this industry. Ho...

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Problems solved by technology

[0003] The main purpose of the present invention is to solve the problem that the gas generated in the production process of the existing device and process for producing gas by biomass carbonization and cracking cannot be discharged in time for recovery, and the increase in furnace pressure will cause gas overflow to block the furnace tube and affect normal operation. production problems;

[0004] Another object of the present invention is to solve the problem that the furnace path of the retort furnace is too short in the existing biomass carbonization cracking device for producing gas, so that the reaction of biomass in the furnace path of the carbonization furnace is insufficient and cannot be produced on a large scale;

[0005] Another object of the present invention is to solve the problems of dry distillation gas production, tar cracking and CO conversion into CH 4 The process consists of three sets of devices, which require several processes to complete, and there are problems such as complex process, high energy consumption, and narrow selection of catalysts

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