System and method used for co-production of glycol and LNG from kitchen waste and straw

Abstract

The invention discloses a system used for co-production of glycol and LNG from kitchen waste and straw. According to the system, a straw receiving cabin is connected with a pyrolysis device, a compression device, a decarburization device, and a deep cold separation device, and then is communicated with a biogas purification system, a CO purification device, and a hydrogen gas purification system respectively; the hydrogen purification system is connected with a glycol synthesis device; the CO purification device and an O2 supply device are communicated with a DMO synthesis device, and then arecommunicated with the glycol synthesis device; a kitchen waste receiving material cabin is connected with a sorting device, a crushing device, and a thermal hydrolysis device, and then is communicated with a pre-treatment tank, and an anaerobic fermentation hydrogen generating device; an anaerobic sludge supply cabin is communicated with the anaerobic fermentation hydrogen generating device; theanaerobic fermentation hydrogen generating device is communicated with the hydrogen gas purification system and a first stage anaerobic digestion tank respectively; the first stage anaerobic digestiontank is communicated with a drying device and a water storage tank through a solid liquid separation tank, a first stage biogas slurry tank, and the like; and the first stage anaerobic digestion tankis communicated with the biogas purification system through a biogas tank.

Description

technical field [0001] The invention relates to the field of energy and environmental protection, in particular to a system and method for synthesizing ethylene glycol from kitchen waste and straw to co-produce LNG. Background technique [0002] In recent years, with the improvement of people's living standards, the amount of food waste generated has been increasing continuously, showing a sharp growth trend. At present, food waste in some areas of my country is in a state of disorderly management. It is usually piled up easily, breeding mosquitoes and flies, and producing stench, which is harmful to the environment. Pollution and human health pose a great risk. The use of traditional landfill method will not only cause the loss of nutritional value in kitchen waste, but also easily produce secondary pollution such as malodorous gas and leachate; The value is low, and a large amount of harmful gas is produced, which seriously affects the surrounding ecological environment an...

AI Technical Summary

Problems solved by technology

my country's ethylene glycol production capacity and output have grown rapidly, but it still cannot meet the growing market demand for domestic polyester, and has to import a large amount every year, and the import volume is increasing year by year

In this situation, in addition to considering the use of advanced technology to tap the potential of the existing ethylene glycol production equipment, the relevant domestic enterprises have passed the appraisal of the results organized by the Chinese Academy of Sciences on March 18. This achievement marks my country's It is the first in the world to realize a complete set of "coal-to-ethylene glycol" technical route and industrial application. It is a world-first technology with independent intellectual property rights, but there is no precedent for using biomass materials to synthesize ethylene glycol.

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