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Treatment method and system for demineralization and pyrolysis of salt-containing organic waste liquid

A technology of organic waste liquid and treatment method, applied in combustion methods, separation methods, chemical instruments and methods, etc., can solve the problems of difficult long-term stable operation, increase the difficulty of fly ash treatment, etc., and achieve the goal of increasing treatment difficulty and saving energy. Effect

Active Publication Date: 2018-09-04
SOUTHEAST UNIV
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Problems solved by technology

It is difficult to run stably for a long time, and at the same time, salt enters the fly ash, which increases the difficulty of fly ash treatment

Method used

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  • Treatment method and system for demineralization and pyrolysis of salt-containing organic waste liquid

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0026] The salt-containing organic waste liquid desalination pyrolysis treatment method of the present invention comprises the following steps:

[0027] (1) The blower 3 sends the cold air at 10-20°C into the gas-gas heat exchanger 4, and exchanges heat with the high-temperature flue gas at the outlet of the second combustion chamber of the boiler at 1050-1100°C to obtain heat at 300-600°C. Air enters the atomization tower 8; flue gas at 500-800°C after heat exchange enters the tubular pyrolysis reactor 5;

[0028] (2) The salt-containing organic waste liquid in the water collection tank 6 is sent to the atomization tower 8 by the first water pump 7, so that the salt-containing organic waste liquid is atomized, and the hot air sent in by (1) is evaporated and dried. The...

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Abstract

The invention discloses a treatment method and system for demineralization and pyrolysis of salt-containing organic waste liquid. The method comprises the following steps: (a) air preheating; (b) spray drying; (c) separation and recovery; and (d) pyrolysis. The treatment system for demineralization and pyrolysis of salt-containing organic waste liquid comprises an incinerator, a gas-gas heat exchanger connected with the outlet of a rear secondary combustion chamber of the incinerator, a tubular pyrolysis reactor connected with the flue gas outlet of the gas-gas heat exchanger, an atomization tower connected with the air outlet of the gas-gas heat exchanger, and a cyclone dust collector connected with the gas-solid mixture outlet of the atomization tower. The treatment method and system ofthe invention can utilize the residual heat of flue gas to avoid the problems of softening, coking, flue clogging, heat exchanger clogging and the like of salt sprayed into the waste liquid of the incinerator by the salt-containing organic waste liquid; at the same time, the treatment of the salt-containing organic waste liquid can be separated from the whole process, and no influence is exerted on original process.

Description

technical field [0001] The invention relates to a salt-containing organic waste liquid treatment technology, in particular to a salt-containing organic waste liquid pyrolysis treatment method and system. Background technique [0002] High-salt organic waste liquid generally refers to waste liquid with COD>10000mg / L and salt content>50000mg / L. The salts contained include chloride ions, sulfate ions, sodium ions, calcium ions, etc., mainly from pharmaceutical factories , pesticide factories, petrochemical industry and coal chemical industry, etc. This liquid waste is managed and disposed of as hazardous waste. [0003] The organic components in high-salt organic waste liquids in different industries are different. The organic matter in high-salt waste liquid mainly comes from organic solvents. The common organic matter in pharmaceutical factories is as follows: low-boiling point organic matter: methanol boiling point 64.5°C; medium-boiling point organic matter: ethyl a...

Claims

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Application Information

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IPC IPC(8): B01D1/00B01D1/30F23G5/027F23G5/44F23G7/06F23J15/06F28D7/08
CPCB01D1/00B01D1/30F23G5/027F23G5/44F23G7/06F23J15/06F28D7/08Y02E20/30
Inventor 葛仕福张程
Owner SOUTHEAST UNIV
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