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Method for treating high-ammonia-nitrogen industrial wastewater of denitration catalyst

A denitration catalyst and a technology for producing wastewater, which are applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. The problem of poor biochemical properties of wastewater can reduce impact, save investment, and improve biochemical properties.

Inactive Publication Date: 2014-01-01
ZHEJIANG DONGFA ENVIRONMENTAL PROTECTION ENG
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Problems solved by technology

[0011] The present invention provides a method for treating waste water produced by high ammonia nitrogen denitrification catalysts, which mainly solves the problem of BOD in waste water existing in the prior art. 5 When the value is low, the biochemical property of the wastewater is poor, and the biochemical treatment effect cannot be well guaranteed. When dilute sulfuric acid is used as the absorbent of the ammonia scrubber, the salt content (ammonium sulfate) in the wastewater is high, which affects the biochemical treatment effect, etc. technical problem

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  • Method for treating high-ammonia-nitrogen industrial wastewater of denitration catalyst

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Embodiment 1

[0034] Embodiment 1: a kind of method of processing waste water produced by high ammonia nitrogen denitrification catalyst of this example, such as figure 1 , the steps are:

[0035] a. After ammonia washing tower, mold cleaning and ground washing wastewater are mixed in the wastewater collection tank and reach a certain level, use air to aerate the wastewater to adjust the mixing evenly, and pre-oxidize some substances;

[0036] b. After the adjusted wastewater is lifted by the pump, polyaluminum chloride (PAC) and polyacrylamide (PAM) are sequentially added into the grid flocculation reaction sedimentation tank. The dosage of PAC is 100mg / L, and the dosage of PAM is 3mg / L;

[0037] c. The flocculation reaction time of the sedimentation tank is 10 minutes. After rectification, the wastewater enters the sedimentation area for sedimentation. The horizontal flow rate is 8mm / s, and the water is discharged in the form of a triangular weir;

[0038] d. The effluent from the sedi...

Embodiment 2

[0042] Embodiment 2: a kind of method of processing waste water produced by high ammonia nitrogen denitrification catalyst of this example, such as figure 1 , the steps are:

[0043] a. After ammonia washing tower, mold cleaning and ground washing wastewater are mixed in the wastewater collection tank and reach a certain level, use air to aerate the wastewater to adjust the mixing evenly, and pre-oxidize some substances;

[0044] b. After the adjusted wastewater is lifted by the pump, polyaluminum chloride (PAC) and polyacrylamide (PAM) are sequentially added into the grid flocculation reaction sedimentation tank. The dosage of PAC is 110mg / L, and the dosage of PAM is 4mg / L;

[0045] c. The flocculation reaction time of the sedimentation tank is 13 minutes. After rectification, the wastewater enters the sedimentation area for sedimentation. The horizontal flow rate is 89mm / s, and the water is discharged in the form of a triangular weir;

[0046] d. The effluent from the sed...

Embodiment 3

[0050] Embodiment 3: a kind of method of processing waste water produced by high ammonia nitrogen denitrification catalyst of this example, such as figure 1 , the steps are:

[0051]a. After ammonia washing tower, mold cleaning and ground washing wastewater are mixed in the wastewater collection tank and reach a certain level, use air to aerate the wastewater to adjust the mixing evenly, and pre-oxidize some substances;

[0052] b. After the adjusted wastewater is lifted by the pump, polyaluminum chloride (PAC) and polyacrylamide (PAM) are sequentially added into the grid flocculation reaction sedimentation tank. The dosage of PAC is 120mg / L, and the dosage of PAM is 5mg / L;

[0053] c. The flocculation reaction time of the sedimentation tank is 15 minutes. The wastewater enters the sedimentation area after rectification for sedimentation. The horizontal flow rate is 10mm / s, and the water is discharged in the form of a triangular weir;

[0054] d. The effluent from the sedim...

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Abstract

The invention relates to the field of wastewater treatment, in particular to a method for treating high-ammonia-nitrogen industrial wastewater of a denitration catalyst, and aims to solve the technical problems that when BOD 5 value in wastewater is relatively small, the biochemical performance of the wastewater is poor, so that a biochemical treatment effect can not be ensured well, when a sulphuric acid solution is used as an absorbent of an ammonia washing tower, the content of salt (ammonium sulfate) in the wastewater is relatively high, so that the biochemical treatment effect is affected. The method comprises the following steps: using air to perform aeration adjustment on the wastewater so as to enable the air and the wastewater to be mixed uniformly, and performing pre-oxidation on parts of substances; sequentially adding poly aluminium chloride and polyacrylamide in a grid flocculation reaction precipitation tank, and adopting a triangular weir manner for water outflow; performing desalinization pretreatment to remove ammonia nitrogen and salinity, and enabling condensate outlet water subjected to evaporative crystallization to be mixed with domestic sewage and to flow to an adjusting tank automatically; allowing the mixed liquid to sequentially pass anaerobic, facultative, aerobiotic and the like biochemical treatment sections, and utilizing biological florae to treat organic materials and the ammonia nitrogen in the wastewater so as to enable the outlet water to meet discharge standards finally.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating wastewater produced by a high ammonia nitrogen denitrification catalyst. Background technique [0002] With the gradual development of my country's denitrification catalyst industry, the problem of wastewater treatment has become increasingly prominent. The production process of denitrification catalyst will produce production wastewater with high ammonia nitrogen content. If it is not treated, it will lead to eutrophication of water body and affect the ecological environment if it is discharged into the external environment. [0003] The main sources of wastewater generated during the catalyst production process are: ammonia-containing washing tower wastewater, mold cleaning room wastewater, ammonia-containing tail gas pipeline cleaning wastewater, mixer cleaning wastewater, a small amount of lactic acid, MEA waste liquid and some ground flushing water. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 徐忠明陈林华韩东浩徐锋军王利震
Owner ZHEJIANG DONGFA ENVIRONMENTAL PROTECTION ENG
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