Tianjin University

Tianjin University of Commerce

Zhanjun Cheng

Guanyi Chen

Beibei Yan

Junyu Tao

Jian Li

Ning Li

Fawei Lin

Yunan Sun

Lan Mu

Wenchao Ma

Xiaoqiang Cui

Yuting Wang

Junxia Wang

Fan Yu

Jiantao Li

Jiangtao Wang

Wanqing Li

Yanbin Zhang

Yurou Mao

Xiang Guo

Xiaoling Hao

Yude Gu

Rui Liang

Yadong Ge

Yongjie Hu

Jing Tian

Jinglan Wang

Congcong Cao

The present invention relates to the technical field of solid waste resource utilization and environmental engineering, and in particular to a method for recovering phosphorus based on cyclic hydrothermal carbonization of wetland plants, comprising the following steps: (1) washing, drying, then crushing and sieving harvested wetland plants; (2) taking biomass powder for hydrothermal carbonization treatment to obtain a hydrothermal carbonization product; (3) performing solid-liquid separation for the obtained carbonization product; (4) continuing to use the obtained carbonization liquid as a liquid-phase medium and mixing with the biomass raw material for multi-stage cyclic hydrothermal carbonization; after the cyclic carbonization is ended, conducting solid-liquid separation to obtain phosphorus-rich carbonization liquid and cyclic hydrochar; and (5) adjusting the pH of the phosphorus-rich carbonization liquid to form and recover phosphorus crystal precipitates. The present invention effectively recovers phosphorus from the wetland plants, simultaneously realizes the resource utilization of the hydrothermal carbonization product of the wetland plants, reduces the impact of hydrothermal carbonization of biomass waste on environment, and effectively solves the problems of treatment and disposal of wetland plant residues.

Method for recovering phosphorus based on cyclic hydrothermal carbonization of wetland plants

The present disclosure provides a treatment method for oily sludge and a method for soil remediation. The treatment method for oily sludge includes: mixing the oily sludge with target biochar uniformly according to a first preset mass ratio, and conducting catalytic pyrolysis at a first preset temperature to achieve efficient removal of petroleum hydrocarbons, to obtain a pyrolysis residue used for soil remediation. In the present disclosure, the method realizes resource utilization and harmless utilization of the pyrolysis residue.

Treatment method for oily sludge and method for soil remediation

A method for preparing a supercritical fluid by deep-sea pressure is provided and belongs to the technical field of supercritical fluid preparation. The method includes the following steps of: placing a low-pressure fluid in a closed flexible container, sending the closed flexible container down to a location of a sea at a depth where a seawater pressure meets a requirement by using a powered or unpowered traction device, leaving the flexible container standing still until a volume of the flexible container does not change, wrapping the closed flexible container with a rigid pressure-bearing container, transferring the closed flexible container to the sea surface by the powered or unpowered traction device, and taking out the fluid in the flexible container as supercritical fluid. Then the supercritical fluid is produced. Therefore, the process of preparing supercritical (high pressure) liquid in the deep-sea is safer and more stable than the preparation way on land.

Method for preparing supercritical fluid by deep-sea pressure

A sorting-based garbage classification method and a sorting-based garbage classification device are provided. The method utilizes quantitative features of domestic garbage components and adopts bubble sort algorithm to build a sorting model to sort and classify domestic garbage. The method is more in line with technical requirements of downstream incineration, pyrolysis gasification and so on, and has the features of high fault tolerance rate and high operation efficiency, and is characterized by controllable environmental impact, flexible product form and high energy utilization efficiency in the operation process.

Sorting-based garbage classification method and device

A method for preparing biochar and hydrogen by utilizing anaerobic fermentation byproducts, the method including: (1) mixing a first straw, seeding sludge and distilled water, and then carrying out anaerobic fermentation to obtain a mixed product after fermentation; (2) performing separation on the mixed product to obtain a second straw and biogas slurry; and (3) carbonizing the second straw to obtain biochar, and collecting gas after a pressurized catalytic reaction on the biogas slurry to obtain hydrogen.

Method for preparing biochar and hydrogen by utilizing anaerobic fermentation byproducts

Disclosed herein are integrated preparation and detection devices for studying biomass-burning aerosols, where the devices include a micro-fluidized bed reactor (MFBR), a transmission line, and an on-line detection unit that are connected in sequence. The MFBR may include a pyrolysis reactor and a pyrolysis furnace; the pyrolysis reactor may include a thermocouple, an introduction tube, and quartz sands; the on-line detection unit may be an on-line photoionization mass spectrometer; and the photoionization mass spectrometer may include a laser desorption system, a laser ionizer and a light energy ionizer. Devices of the present disclosure are beneficial to retain the original state of aerosol particles, and the fixed MFBR can realize rapid pyrolysis of a biomass due to its high and stable heat conduction efficiency, which is beneficial to studying the formation mechanism of aerosol particles.

Integrated preparation and detection device for biomass-burning aerosol and method thereby

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Tianjin, China

Zhanjun Cheng