Special palladium catalyst for sewage treatment and application thereof

A technology of sewage treatment and palladium catalyst, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., to reduce pressure and cost, reduce treatment cost, and remove odor

Inactive Publication Date: 2013-09-04
NANJING DELEI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The problems existing in the existing sewage treatment process are: the equipment used occupies a large area, the construction cost is high, the equipment investment is large, the operation cost is high, and there is a certain degree of difficulty in popularization and application. limitations
The degradation and treatment of harmful substances are not thorough enough, and the problems of detoxification and deodorization of sewage and the decomposition and removal of organic pollutants are not fully resolved

Method used

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  • Special palladium catalyst for sewage treatment and application thereof
  • Special palladium catalyst for sewage treatment and application thereof
  • Special palladium catalyst for sewage treatment and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Wherein, the pickling activation is to use 15wt% hydrochloric acid and pickling activation at 45°C.

[0036] Wherein, the operation of the chemical deposition is as follows: prepare 2-5g palladium chloride per square meter according to the surface area of ​​stainless steel, dissolve it with 31wt% hydrochloric acid and pour it into 95 liters of pure water, add sodium citrate to the above solution 300g, add ammonia water to raise the pH value of the solution to 8~9, heat the solution to control the temperature at 65°C, put stainless steel into the above solution, and slowly add hydrazine hydrate N 2 h 4 .H 2 O, the total amount of hydrazine hydrate added is 100ml. After the hydrazine hydrate is evenly added within 2 hours, continue to control the solution temperature at 65° C., and finish the chemical deposition process after 1 hour.

[0037] The stainless steel sample treated by the method of this embodiment is subjected to X-fluorescence test, and it can be known that...

Embodiment 2

[0042] Wherein, the pickling activation is to use 15wt% hydrochloric acid and pickling activation at 45°C.

[0043] Wherein, the operation of described chemical deposition is as follows: according to the surface area of ​​stainless steel per square meter, prepare working solution: 95 liters of pure water, add 200g sodium citrate, 200g EDTA, glucose 100g, add ammonia water and make the solution pH value rise to 9~10, heat to control the solution temperature at 65°C; prepare two solutions A and B before heating; preparation method of solution A: dissolve 2g palladium chloride with 31wt% hydrochloric acid, add ammonia water to make the pH value reach above 11 , add water to 1000mL for use; B solution preparation method: 1g AgNO 3 , add water to dissolve, add ammonia water 100mL, add water to 500mL for use; put the stainless steel into the working fluid with controlled temperature, add it into the above working fluid evenly within 2 hours according to the volume ratio A:B=2:1, and...

Embodiment 3

[0049] Example 4: Pilot test comparison of oxidation effect with or without catalyst.

[0050] Two 304 stainless steel reactors were made with the same design size and process. The diameter of the reactor was DN100mm and the length was 0.6 meters. 4.5 cubic decimeters of 304 stainless steel packing was placed inside the reactor. The specific surface area of ​​the packing was 500 square meters per cubic meter. One of them is without any treatment (that is, there is no catalyst in the reactor); the inner stainless steel of the other one is the stainless steel containing palladium catalyst treated in Embodiment 1 (that is, there is a catalyst in the reactor). The pipes are connected with the pump and the Venturi mixer respectively, so that the sewage flows through the Venturi mixer through the outlet of the pump, and the ozone-containing gas is sucked into the catalytic reactor and then flows out.

[0051] Two kinds of stainless steel reactors were used to treat the sewage contai...

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Abstract

The invention discloses a special palladium catalyst for sewage treatment. Stainless steel serves as a carrier, and a metal palladium layer is uniformed distributed on the surface of the stainless steel. The invention further discloses a preparation method of the special palladium catalyst for sewage treatment and an application of the special palladium catalyst for sewage treatment. The special palladium catalyst is low in operation cost, has a good decontamination effect, can effectively degrade organic matters, removes odor and carries out effective decoloration.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a special palladium catalyst for sewage treatment and its application. Background technique [0002] A traditional sewage treatment process is to pass the discharged sewage through sedimentation tanks, advection tanks, filtration devices, concentration tanks, mud-water separation devices, etc. to complete the whole process of sewage treatment. "Sewage Treatment" (CN1100070A) builds an oxidation pond in the offshore area, and is divided into aerobic, anaerobic and facultative areas, uses microorganisms to digest harmful substances in the wastewater, and the treated sewage can be discharged from the oxidation pond with a pump In the open sea, digestate and tangible particles settle to the bottom of the pond. This scheme has high requirements on terrain and climate, and is not suitable for large-scale promotion. "Sewage Treatment Machine" (CN 101574...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/78C02F1/74
CPCB01J23/89B01J23/8933B01J37/0225C02F1/725C02F1/74C02F1/78C02F2101/30C02F2101/308C02F2303/02B01J23/44B01J23/50B01J23/8906C02F2101/20
Inventor 吴浩
Owner NANJING DELEI SCI & TECH
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