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Heat pump rectification steam stripping deamination method

A technology of stripping ammonia removal and heat pump rectification, which is applied in ammonia preparation/separation, degassed water/sewage treatment, energy input, etc. It can solve the problems of high cost of ammonia nitrogen wastewater treatment and high steam unit consumption of ammonia nitrogen wastewater treatment

Active Publication Date: 2014-08-06
BEIJING SUN SILVER SCI & TECH
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Problems solved by technology

[0005] The traditional process of steam stripping method uses lye to adjust the pH value of the wastewater, and then uses steam in the stripping deamination tower to recover the ammonia in the ammonia nitrogen wastewater in the form of concentrated ammonia water or concentrated ammonia gas. The circulating water in the tower top condenser is condensed, resulting in a high unit consumption of steam for the treatment of ammonia nitrogen wastewater (200-300kg steam / ton of wastewater), and the cost of ammonia nitrogen wastewater treatment is very high

Method used

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  • Heat pump rectification steam stripping deamination method

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Embodiment 1

[0039] Adopt the present invention to process ammonia nitrogen waste water import ammonia nitrogen concentration 8000mg / L, processing capacity is 30m 3 / h. Nessler's reagent colorimetric method (GB7479-87) was used for analysis, and the concentration of ammonia nitrogen in the treated wastewater was 2.7mg / L. The steam consumption is 32kg / ton of waste water.

Embodiment 2

[0041] Use the present invention to process ammonia nitrogen waste water import ammonia nitrogen concentration 30000mg / L, processing capacity is 18m 3 / h. Nessler's reagent colorimetric method (GB7479-87) was used for analysis, and the concentration of ammonia nitrogen in the treated wastewater was 5.5 mg / L. The steam consumption is 40kg / ton of waste water.

Embodiment 3

[0043] Use the present invention to process ammonia nitrogen waste water import ammonia nitrogen concentration 60000mg / L, treatment capacity is 22m 3 / h. Nessler's reagent colorimetric method (GB7479-87) was used for analysis, and the concentration of ammonia nitrogen in the treated wastewater was 9.7mg / L. The steam consumption is 49kg / ton of waste water.

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Abstract

The present invention relates to a process method for industrial wastewater emission reduction and resource utilization, specifically to a method for resource utilization of ammonia nitrogen by using a heat pump rectification technology and a steam stripping deamination process. According to the present invention, the 1000-80000 mg / L of the ammonia nitrogen wastewater treated by the process of the present invention achieves the national first-class ammonia nitrogen emission standard, the ammonia in the wastewater can be recovered and utilized in the ammonia and ammonia water form, and the steam consumption of the deamination process is 25-50 kg / ton wastewater.

Description

technical field [0001] The invention relates to a process method for reducing discharge of industrial wastewater and resource utilization, in particular to a method for treating ammonia nitrogen wastewater and resource utilization of ammonia nitrogen by adopting heat pump rectification technology and stripping deammonization process. Background technique [0002] A large amount of ammonia nitrogen wastewater will be produced in industries such as chemical fertilizers, pesticides, foaming agents, and catalysts. An increase in the concentration of ammonia nitrogen in the water body will lead to eutrophication of the water body, which will eventually make the water body turbid, produce stench, and seriously pollute the water body. Therefore, the country has strict regulations and restrictions on the content of ammonia nitrogen in the discharged wastewater (GB8978-1996 "Comprehensive Discharge Standard for Sewage" stipulates that the first-level standard ammonia nitrogen is less ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20C01C1/02
CPCY02P20/129
Inventor 宋云华刘欣陈建铭魏玉胜李璐
Owner BEIJING SUN SILVER SCI & TECH
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