Integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid

Patent metadata

Field	Value
Publication number	US-10907828-B2
Application number	US-201816613325-A
Country	US
Kind code	B2
Filing date	Nov 7, 2018
Priority date	Jan 16, 2018
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

The present disclosure relates to an integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid, the organic waste liquid to be disposed flowing into two evaporation chambers in succession for two-stage submerged combustion evaporation. The two evaporation chambers are provided in one evaporation tank and communicate with each other at the bottom of the evaporation tank, the organic waste liquid enters a first evaporation chamber from a raw liquid inlet pipe, and the organic waste liquid flows from the first evaporation chamber to a second evaporation chamber during submerged combustion evaporation. The method has advantages of improving the evaporation concentration efficiency, reducing the numbers of evaporators and transport pipes of all sorts of gases and liquids and saving energy, saving the area occupied and the cost, while simplifying treatment process and facilitating operation management.

First claim

What is claimed is:

1. An integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid, the organic waste liquid to be disposed flowing into two evaporation chambers in succession for two-stage submerged combustion evaporation, wherein,
the two evaporation chambers are provided in one evaporation tank and communicate with each other at the bottom of the evaporation tank, the two evaporation chambers are divided via a partition, there is a gap reserved between the partition and the bottom of the evaporation tank,
the organic waste liquid enters a first evaporation chamber from a raw liquid inlet pipe, and the organic waste liquid flows from the first evaporation chamber to a second evaporation chamber via the gap during submerged combustion evaporation,
the bottom of the evaporation tank is designed as an inclined structure, so that the height of the bottom of the evaporation tank in the vicinity of both sides of the partition enables the organic waste liquid in the first evaporation chamber to flow into the second evaporation chamber under gravity, residence time of the organic waste liquid in the first evaporation chamber is controlled by adjusting a partition position of the partition and/or size of the gap.

2. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 1 , wherein,
a combustion chamber is arranged at an upper portion of the second evaporation chamber, and evaporated gas generated in the first evaporation chamber is passed into the combustion chamber in the second evaporation chamber for combustion treatment.

3. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 2 , wherein,
gas resulting from combustion in the combustion chamber is passed into the organic waste liquid in the second evaporation chamber.

4. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 1 , wherein,
exhaust gas resulting from submerged combustion evaporation in the second evaporation chamber is directly discharged from the evaporation tank to environmental air or is condensed.

5. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 1 , wherein,
a concentrate and/or crystal concentrated in the second evaporation chamber is discharged from the bottom of the evaporation tank.

6. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 2 , wherein,
bottoms of the first and second evaporation chambers are provided with gas distribution systems, combustible gas and comburent gas are torn into microbubbles through the gas distribution systems, and the microbubbles come into contact with the organic waste liquid for evaporation.

7. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 6 , wherein,
the combustible gas is one or more of anaerobic biogas, landfill gas, and waste pyrolysis gas.

8. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 6 , wherein,
temperature of the combustion chamber in the second evaporation chamber is not lower than 850° C., temperature of the organic waste liquid discharged from the first evaporation chamber is 89° C. to 95° C., and temperature of exhaust gas discharged from the evaporation tank is lower than 100° C.

9. The integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid according to claim 1 , wherein,
the organic waste liquid is landfill leachate or concentrate of the landfill leachate.

Assignees

• Univ Tsinghua

Inventors

• Yue Dongbei
• Zhang Lingyue

Classifications

• C02F2103/06

  Contaminated groundwater or leachate · CPC title

• F23G2204/103

  gaseous or liquid fuel · CPC title

• C02F1/16

  using waste heat from other processes · CPC title

• F23G7/008 Primary

  for liquid waste (waste oil F23G7/05, waste liquors F23G7/04, sludges F23G7/001) · CPC title

• F23G2209/10

  Liquid waste · CPC title