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Catalyst for inorganic ammonia nitrogen wastewater and wastewater treatment process

A treatment process and catalyst technology, applied in the direction of oxidized water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of restricting large-scale use of inorganic ammonia nitrogen wastewater treatment, and achieve unit design Perfect, good catalytic stability, not easy to lose effect

Pending Publication Date: 2022-04-22
江西挺进环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overall, the nitrification and denitrification process has high requirements on operating temperature, carbon source demand and oxygen supply, which also greatly limits the large-scale application of nitrification and denitrification to the treatment of inorganic ammonia nitrogen wastewater.

Method used

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  • Catalyst for inorganic ammonia nitrogen wastewater and wastewater treatment process
  • Catalyst for inorganic ammonia nitrogen wastewater and wastewater treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The catalyst preparation process is as follows:

[0042] Step 1: Choose a carrier

[0043] Select water-quenched slag of 100-400 mesh as the catalyst carrier, preferably water-quenched slag of 200 mesh or more;

[0044] The second step: prepare 3.5% Mg2+ magnesium nitrate solution

[0045] According to the percentage by weight, the proportion of magnesium nitrate hexahydrate above industrial grade is 35-40, and water is 60-65;

[0046] Step Three: Dipping

[0047] Immerse the catalyst carrier in the magnesium nitrate solution for more than 4 hours to load the magnesium on the surface of the carrier;

[0048] Step Four: Dry

[0049] Take out the catalyst carrier from the magnesium nitrate solution, dry it at room temperature, put it into an oven, and dry it at 100-120°C for more than 12 hours;

[0050]Step 5: Roasting

[0051] Put the above-mentioned dried catalyst carrier into a furnace, and bake it at 400°C for 4 hours to obtain the MgO-based catalyst;

[0052] ...

Embodiment 2

[0054] The catalyst preparation process is as follows:

[0055] Step 1: Choose a carrier

[0056] Select water-quenched slag of 100-400 mesh as the catalyst carrier, preferably water-quenched slag of 200 mesh or more;

[0057] The second step: prepare 3.5% Mg2+ magnesium nitrate solution

[0058] According to the percentage by weight, the proportion of magnesium nitrate hexahydrate above industrial grade is 35-40, and water is 60-65;

[0059] Step Three: Dipping

[0060] Immerse the catalyst carrier in the magnesium nitrate solution for more than 4 hours to load the magnesium on the surface of the carrier;

[0061] Step Four: Dry

[0062] Take out the catalyst carrier from the magnesium nitrate solution, dry it at room temperature, put it into an oven, and dry it at 100-120°C for more than 12 hours;

[0063] Step 5: Roasting

[0064] Put the above-mentioned dried catalyst carrier into a furnace, and bake it at 400°C for 4 hours to obtain the MgO-based catalyst;

[0065]...

Embodiment 3

[0067] The catalyst preparation process is as follows:

[0068] Step 1: Choose a carrier

[0069] Select water-quenched slag of 100-400 mesh as the catalyst carrier, preferably water-quenched slag of 200 mesh or more;

[0070] The second step: prepare 3.5% Mg2+ magnesium nitrate solution

[0071] According to the percentage by weight, the proportion of magnesium nitrate hexahydrate above industrial grade is 35-40, and water is 60-65;

[0072] Step Three: Dipping

[0073] Immerse the catalyst carrier in the magnesium nitrate solution for more than 4 hours to load the magnesium on the surface of the carrier;

[0074] Step Four: Dry

[0075] Take out the catalyst carrier from the magnesium nitrate solution, dry it at room temperature, put it into an oven, and dry it at 100-120°C for more than 12 hours;

[0076] Step 5: Roasting

[0077] Put the above-mentioned dried catalyst carrier into a furnace, and bake it at 600°C for 4 hours to obtain the MgO-based catalyst;

[0078]...

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Abstract

The invention discloses a treatment process for inorganic ammonia nitrogen wastewater. Ammonia nitrogen is removed through a pretreatment unit and a catalytic ozonation unit. The preparation method of the catalyst comprises the following steps: selecting 100-400-mesh water-quenched slag as a catalyst carrier; preparing a magnesium nitrate solution from 35-40% by weight of magnesium nitrate hexahydrate with the industrial purity higher than that of the magnesium nitrate hexahydrate and 60-65% by weight of water; immersing the catalyst carrier in a magnesium nitrate solution for more than 4 hours, so that magnesium is loaded on the surface of the carrier; taking out the catalyst carrier from the magnesium nitrate solution, airing at room temperature, putting into a drying oven, and drying at 100-120 DEG C for more than 12 hours; and putting the dried catalyst carrier into a furnace, and roasting for more than 4 hours under the condition of 400-600 DEG C, thereby obtaining the catalyst. The catalyst is wide in raw material source, low in cost, simple in preparation method, good in catalytic stability, not prone to loss, free of secondary pollution, free of aftertreatment and capable of being regenerated and reused.

Description

technical field [0001] The invention relates to the field of waste (sewage) water treatment, in particular to a catalyst for inorganic ammonia nitrogen waste water and a waste water treatment process. Background technique [0002] In recent years, with the rapid development of my country's economy and the in-depth advancement of industrialization, urbanization and agricultural modernization, more and more waste (sewage) water has been generated, seriously affecting the living environment. There are two main types of ammonia nitrogen in wastewater, one is ammonia nitrogen formed by ammonia water, and the other is ammonia nitrogen formed by inorganic ammonia, mainly ammonium sulfate and ammonium chloride. Generally divided into four types: organic nitrogen, ammonia nitrogen, nitrite nitrogen (NO2-) and nitrate nitrogen (NO3-). The natural surface water and groundwater mainly contain nitrate nitrogen (NO3-). The general formation of high ammonia nitrogen wastewater is caused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/10B01J23/72B01J23/745B01J37/02C02F9/04C02F1/78C02F1/52C02F101/16
CPCB01J21/10B01J23/72B01J23/745B01J37/0201C02F9/00C02F1/725C02F1/78C02F1/001C02F2001/007C02F1/52C02F2101/16C02F2209/44
Inventor 邱根萍宁小飞陈后兴徐传肮董乔红吉康宁肖建林
Owner 江西挺进环保科技股份有限公司
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