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Plastic filler for wastewater treatment and method for loading catalyst on plastic filler

A waste water treatment and catalyst technology, which is applied in the direction of physical/chemical process catalysts, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of small specific surface area, small porosity, large bulk density, etc., and achieve large specific surface area, Low gas phase resistance and good catalytic activity

Inactive Publication Date: 2021-11-12
TIANJIN ZHENGDA SCI &TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used supports for catalytic oxidation catalysts include activated carbon, alumina, silica gel, diatomaceous earth, etc., and the common shapes are granular, rod-shaped, spherical, etc., but their small specific surface area, small porosity, high bulk density, and large wind resistance are not suitable. Applied to spray catalytic oxidation packed tower to treat wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. A method of Pall ring packing catalytically oxidizing catalyst Example

[0018] Preparation of plastic pall ring: Material double injection molding process, the injection core material is PC, the sheath material is a LDPE 1000L Pall rings, Pall rings wherein the size of 38mm in diameter, 38mm high, wall thickness 2mm, wherein the core PC thick 1.4mm, LDPE outer thick-skinned 0.3mm. Wherein PC mp 230-260 ℃, LDPE melting point of 90-125 deg.] C

[0019] Catalyst is manganese dioxide, powdered, 6000 mesh, at temperature above 400 ℃.

[0020] 1000L plastic pall ring to the drum and discharge the catalyst 50Kg electrically heated pot, adjustment of the heating temperature 150 ± 10 ℃, speed 60r / min, Pall rings become sticky skin gradually melted under heating, because the temperature in the core 230-260 deg.] C, it is not softened and therefore the overall deformation Pall rings, a catalyst temperature above 200 ℃, so performance is not affected. In the case of the stirring ...

Embodiment 2

[0021] Hollow ball supported catalyst for catalytic oxidation method of Example faceted

[0022] Preparation of plastic over a hollow sphere fillers: dual material injection process, the injection core material is nylon 66, the sheath material is EVA multi-faceted hollow ball 1000L, wherein the multi-faceted hollow sphere particle size diameter of 25mm, a wall thickness of 2mm, in which the nylon 66 core material thickness 1.2mm, EVA outer thick skin 0.4mm. Wherein the melting point of nylon 66 210-240 ℃, EVA mp 70-100 ℃.

[0023] Catalyst is manganese dioxide, powdered, 6000 mesh, at temperature above 400 ℃.

[0024] The plastic multi-faceted hollow ball 1000L individually by high-temperature tunnel furnace, adjusting the heating temperature 160 ± 10 ℃, adjust the heating time of 30 seconds tunnel furnace, multi-faceted hollow ball sheath melts gradually become sticky, because the core temperature at 210-240 deg.] C, so multi-faceted hollow ball seasoning overall deformation is n...

Embodiment 3

[0025] Example 3 Raschig ring packing of the supported catalyst for catalytic oxidation

[0026] Preparation of plastic Raschig ring packing: by dipping process, a sufficient amount of heating and melting LDPE, PP material is then 1000L immersed Raschig rings, Raschig rings were then removed, cooled to room temperature, to obtain a sheathing made of LDPE, the core material is PP material Raschig ring packing 1000L. Raschig rings having a diameter of 25mm, LDPE outer thick skin about .0.3mm. PP melting point of about 170 ℃, LDPE mp 90-125 ℃.

[0027] Catalyst is manganese dioxide, powdered, 6000 mesh, at temperature above 400 ℃.

[0028] The 1000L Raschig rings and 50Kg catalyst is placed in an electric frying pan of stainless steel, adjusting the heating temperature 140 ℃, adjust the speed 60r / min. Raschig rings sheath melts gradually become sticky and bonding together the powder catalyst, until the catalyst adhering a uniform layer on the surface of the filler. At this time, he...

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Abstract

The invention discloses a plastic filler for wastewater treatment and a method for loading a catalyst on the plastic filler. The plastic filler is divided into an inner core and an outer layer, the inner core is made of high-melting-point plastic, the outer layer is made of low-melting-point plastic, and the melting point of the inner core is higher than that of the outer layer; the melting point of the outer layer material is lower than the catalyst tolerance temperature; and the appearance of the plastic packing is annular, saddle-shaped or spherical special for a packed tower. The invention also provides a method for loading the catalyst on the plastic filler. The method comprises the following steps: bonding and loading the catalytic oxidation catalyst on the plastic filler in a hybrid bonding and spraying manner, wherein the outer layer of the plastic filler is hot melt after heated to a specific temperature, and the specific temperature is that the heating temperature is higher than the melting temperature of the filler outer layer, lower than the melting temperature of the filler inner core and lower than the catalyst tolerance temperature. When the plastic filler loaded with the catalyst is used for catalytic oxidation treatment of wastewater, the gas-liquid distribution state is excellent, the gas-phase resistance is low, the specific surface area is large, and the catalytic activity is good.

Description

Technical field [0001] The present invention belongs to the field of catalytic oxidation of waste water treatment, catalyst support and relates to a plastic packing method capable of catalytic oxidation as a catalyst carrier. Background technique [0002] Oxidation of the spray tower wastewater treatment is widely used in a variety of shapes of filler filling column (loaded with filler of a supported catalyst), the liquid phase flows along the surface of the filler form a liquid film, dispersed in a continuous flow of gas into the , two-phase gas-liquid contact surface on the liquid film surface of the filler. It belongs to a film in contact with the device. The oxidation reaction in the catalyst to air, oxygen and ozone as oxidant in the liquid phase. Forming a three-phase catalytic reaction systems. [0003] Wherein the catalyst support shape in claim large specific surface area, high porosity, good wetting properties, low bulk density, high mechanical strength properties, to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/74C02F1/72B01J23/34B01J37/02C02F101/10
CPCC02F1/725C02F1/74B01J23/34B01J37/0201B01J37/0215C02F2101/101
Inventor 姜宝安张昕柳源张志伟焦志增刘家节顿士超王明刚
Owner TIANJIN ZHENGDA SCI &TECH CO LTD
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