Method for treating waste water containing acid and ammonia

A treatment method and technology for wastewater, applied in heating water/sewage treatment, degassed water/sewage treatment, etc., can solve the problems of difficult control of process conditions, energy loss, and high cost, and achieve mature equipment and equipment, energy saving, and treatment costs. low effect
CN102320671BInactive Publication Date: 2013-01-30QINGDAO JUNYANG CHEM TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO JUNYANG CHEM TECH
Publication Date
2013-01-30
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to an energy-saving type two-tower stripping method for treating waste water containing acid gas and ammonia, which belongs to the technical field of waste water treatment. The method comprises the following steps of: dividing the waste water which is to be treated and contains acid and ammonia into a cold part and a hot part, and respectively introducing the cold part and the hot part into a deacidification tower from the upper part and the middle upper part of the deacidification tower of a stripping type waste water treatment device, wherein acid gas is introduced into an acid recoverer after being stripped from the top of the deacidification tower; collecting kettle liquid waste water from the bottom of the deacidification tower; introducing the kettle liquid waste water into a deamination tower from the middle upper part of the deamination tower so that ammoniac steam is stripped from the top of the deamination tower; meanwhile, collecting kettle liquid from the bottom of the deamination tower. The heat used by a tower kettle reboiler is derived from the ammoniac steam extracted from the deamination tower; the sulfur residue quantity of the treated waste water is lower than 50mg / L, and the total ammonia content is lower than 100mg / L; and the method provided by the invention has the advantages of simple and easily controlled process, mature technology, low processing cost and energy saving and can be widely applied to various occasions for treating the waste water containing acid and ammonia.
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Description

Technical field:

[0001] The invention belongs to the technical field of wastewater treatment and utilization, and relates to a method for treating wastewater containing acid gas and ammonia, in particular to an energy-saving double-tower stripping method for treating wastewater containing acid gas and ammonia. Background technique:

[0002] In the existing oil refining and coal chemical production process, a large amount of waste water containing acid gas (including carbon dioxide, hydrogen sulfide, etc.) and ammonia is often produced. To treat and reuse these waste water, it is necessary to separate the acid gas and Ammonia can only enter subsequent treatment devices or be reused. Steam stripping is the main common technical method for removing acid gas and ammonia in the current industrial process. Generally, there are technical processes such as single-tower stripping, double-tower stripping and single-tower stripping with side lines. Among them, double-tower stripping A...

Claims

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