TW202208286A - Wastewater purification system having catalytic membrane tube - Google Patents

Abstract

The present invention relates to a wastewater purification system having a catalytic membrane tube. It comprises an oxygen supply device, an ozone production machine, a membrane tube tank including a membrane tube module, a water storage tank and a pump. The membrane tube module has a first end connected to the ozone production machine and the pump, a second end opposite to the first end for connecting the water storage tank, and a plurality of porous membrane tubes. Each of the plurality of porous membrane tubes has a hollow channel, a braided layer wrapped around the hollow channel, a coating layer wrapped around the braided layer, and a plurality of catalysts distributed in the coating layer. Accordingly, the present invention can effectively reduce the content of organic matter and metal in waste water.

Description

Wastewater purification system with catalyst membrane tube

The present invention relates to a waste water purification system containing a catalyst membrane tube, in particular to a waste water purification system capable of performing high-efficiency catalytic oxidation reaction, so as to effectively reduce chemical pollutants in waste water.

According to press, industrial wastewater contains high concentrations of chemical pollutants. If it is directly discharged into underground waterways or rivers, it will seriously pollute the environmental water bodies. Therefore, careful treatment and purification before wastewater discharge has become an important measure. According to the Executive Yuan Environmental Protection According to the regulations of the Administration, the organic content or metal content in wastewater must be treated to a level below a certain level before it can be discharged, so as to ensure the safety of environmental water resources.

At present, there are various methods or systems for treating wastewater. For example, the Republic of China Patent Publication No. M592436 discloses a membrane tube electrodialysis desalination system, which mainly includes a membrane tube group and an isolation net, which can effectively desalinate the salt in water. In addition, the Republic of China Patent Announcement No. I606994 discloses a preparation method of a ceramic catalyst membrane tube, which mainly consists of mixing sinterable powder, metal salts and a binder, and then making The mixed sinterable powders, metal salts and binders form a film tube shape, and then sintered to form a ceramic catalyst film tube. Therefore, when the ceramic catalyst film tube is used in a catalytic catalytic oxidation system, it can oxidatively degrade the content of the catalyst. In the case of phenol wastewater, the pollutants in the phenol-containing wastewater can be effectively converted and the total organic carbon can be effectively removed.

Due to the large demand for different wastewater treatment equipment in Taiwanese industry, how to develop various wastewater treatment or purification systems to reduce the content of chemical pollutants in wastewater is still an important direction for inventors in related fields.

The main purpose of the present invention is to provide a waste water purification system containing a catalyst membrane tube, especially a waste water purification system capable of performing high-efficiency catalytic oxidation reaction, so as to effectively reduce chemical pollutants in the waste water.

In order to achieve the above implementation purpose, the present invention provides a wastewater purification system containing a catalyst membrane tube, which includes: an oxygen supply device; an ozone generator connected to the oxygen supply device; a membrane tube tank, which has a water inlet and a The opposite water outlet end is provided with a membrane tube module, the membrane tube module has a first end connected to the ozone generator, an opposite second end, and a plurality of porous membrane tubes, wherein each porous membrane tube includes a hollow channel, a braided layer arranged around the hollow channel, a coating covering the braided layer, and a plurality of catalysts arranged in the coating; a water storage tank with a water inlet and a water outlet, wherein the water inlet The water outlet is connected to the water outlet of the membrane tube tank by a pipeline; and a pump has an input end connected to the water outlet of the water storage tank, and an output end connected to the water inlet end of the membrane tube tank.

Thereby, the present invention can effectively reduce the organic content and metal content in wastewater (such as chemical chelate wastewater, polyvinyl alcohol (PVA)-containing wastewater, phenol wastewater, dyeing and finishing wastewater, etc.).

The purpose of the present invention and its structural and functional advantages will be described based on the structure shown in the following drawings, together with specific embodiments, so that the examiners can have a more in-depth and specific understanding of the present invention.

Please refer to the first figure, the present invention provides a wastewater purification system with a catalyst membrane tube, which mainly includes an oxygen supply device (1), an ozone generator (2), a membrane tube tank (3) with a membrane tube A module (31), a water storage tank (4) and a pump (5). The ozone generator (2) is connected to an oxygen supply device (1), so that the oxygen supply device (1) supplies oxygen to the ozone generator (2) to produce ozone. The membrane tube tank (3) has a water inlet end (3a) and an opposite water outlet end (3b), and accommodates a membrane tube module (31); the water storage tank (4) has a water inlet (41) and a water outlet (31). The water outlet (42), the water outlet (3b) of the membrane tube tank (3) is connected to the water inlet (41) of the water storage tank (4) by a pipeline (43); the pump (5) has an input end (51) The water outlet (42) of the water storage tank (4) is connected, and an output end (52) is connected to the water inlet end (3a) of the membrane tube slot (3); and is connected to the water outlet end (3b) of the membrane tube slot (3). A pH meter (6) may be further provided on the pipeline (43) of the water storage tank (4) to facilitate the adjustment of the pH value of the waste water.

As shown in the second figure, the membrane tube module (31) has a first end (31a), a second end (31b) opposite to the first end (31a), and a plurality of porous membrane tubes (311).

Also, please refer to the third figure, each porous membrane tube (311) includes a hollow channel (3111), a braided layer (3112) looped around the hollow channel (3111), and a braided layer (3112) wrapped around the hollow channel (3112). ) coating (3113), and a plurality of catalysts (3114) arranged in the coating (3113). Preferably, the diameter of the hollow channel (3111) in each porous membrane tube (311) can be, for example, 1-1.2 mm, the thickness of the braided layer (3112) is 0.4-0.6 mm, and the thickness of the coating layer (3113) 0.1-0.2 mm. The braided layer (3112) can be, for example, a polyester yarn layer, and the coating layer (3113) can be selected from, for example, a polyvinylidene fluoride (PVDF) film, a polysilicon (PSF) film, and a cellulose acetate film. group of membranes.

Preferably, the catalyst (3114) can be selected from, for example, manganese (Mn), iron (Fe), cobalt (Co), copper (Cu), zinc (Zn), nickel (Ni), titanium ( Ti) or cerium (Ce) oxides.

Preferably, the catalyst (3114) can be, for example, composed of an active component and a carrier, and the active component is selected from manganese (Mn), iron (Fe), cobalt (Co), copper ( oxides of Cu), zinc (Zn), nickel (Ni), titanium (Ti) or cerium (Ce), and the support is selected from activated alumina pellets, activated carbon, ceramsite, porous zeolite or graphene, In particular, activated carbon or graphene has more surface area, which can allow organic matter to be decomposed more efficiently.

In addition, the following specific examples can further prove the scope of practical application of the present invention, but are not intended to limit the scope of the present invention in any form.

Example 1

When the wastewater purification system with catalyst membrane tube of the present invention is actually used, please refer to the first figure, the oxygen supply device (1) is connected to the ozone generator (2), and after the ozone generator (2) produces ozone, the membrane tube module The first end (31a) of (31) enters the membrane tube module (31) for catalytic oxidation reaction, and the water outlet (3b) of the membrane tube tank (3) is connected to the inlet and outlet of the water storage tank (4) by a pipeline (43). The water outlet (41) is connected to the water outlet (42) of the water storage tank (4) and is connected to the input end (51) of the pump (5), and the output end (52) of the pump (5) is connected to the membrane tube groove (3). Inlet end (3a). In this way, the whole system forms a loop, and the waste water to be treated is stored in the water storage tank (4). 5) Enter the membrane tube tank (3), and conduct purification treatment through the membrane tube module (31) filled with ozone (8) (as shown in the fourth figure), and the treated wastewater is then passed through the membrane tube module (31) The water outlet (3b) of the water outlet (3b) flows into the water inlet (41) of the water storage tank (4) through the pipeline (43) and returns to the water storage tank (4) again. In this way, the purpose of repeatedly treating and purifying wastewater can be achieved. In addition, in order to improve the convenience of use of the system, a control panel (7) can also be provided to connect and control the oxygen supply device (1), the ozone generator (2) and the pump (5), etc.

Please refer to the second and third figures, the membrane tube module (31) is provided with a plurality of porous membrane tubes (311), wherein each porous membrane tube (311) has a hollow channel (3111), a braided layer (3112) looped around the hollow channel (3111), and a coating (3113) wrapped around the braided layer (3112). The braided layer (3112) is a polyester yarn layer, and the coating layer (3113) is mixed with a plurality of catalysts (3114), and the catalyst (3114) can be, for example, a metal oxide, or a metal oxide with a carrier , to improve the catalytic oxidation reaction. Please refer to the fourth figure, after the ozone (8) enters the membrane tube groove (3), it will be distributed in the membrane tube module (31), so the catalyst (3114) on the coating (3113) of the porous membrane tube (311) Contact with ozone (8) and jointly carry out catalytic oxidation reaction of wastewater, the reaction catalyzed by ozone (8) and metal catalyst (3114) is that ozone (8) generates oxygen radicals through catalyst (3114), and the oxygen radicals follow with the catalyst (3114). Water forms hydroxyl radicals, and finally hydroxyl radicals destroy organic matter and decompose organic matter into carbon dioxide and water.

Embodiment 2

Please refer to Table 1, Figure 5 and Figure 6, the porous membrane tube (311) has a plurality of filter holes (3115) with a particle size of 0.22~10 μm, and the porous membrane tube (311) can be adjusted to different filter holes The pore size and operating pressure of (3115) can control the movement of ozone (8). As shown in Table 1, the operation mode 1 makes ozone (8) appear just saturated and stay in the porous membrane tube (311) without escaping. The porous membrane tube (311); the second operation mode is to make the ozone (8) escape out of the porous membrane tube (311) as fine air bubbles.

Table 1: Operating pressure of filter holes with different pore sizes Pore size (μm) Operation mode one Operation mode two 0.22 <0.35~0.4 (Mpa) ＞0.35~0.4 (Mpa) 0.30 <0.3 (Mpa) >0.3 (Mpa) 0.45 <0.23 (Mpa) >0.23 (Mpa) 0.65 <0.14 (Mpa) >0.14 (Mpa) 0.80 <0.11 (Mpa) >0.11 (Mpa) 1.2 <0.08 (Mpa) ＞0.08 (Mpa) 3.0 <0.07 (Mpa) ＞0.07 (Mpa) 5.0 <0.04 (Mpa) ＞0.04 (Mpa) 8.0 <0.03 (Mpa) ＞0.03 (Mpa) 10.0 <0.01 (Mpa) ＞0.01 (Mpa)

The double arrows in the hollow channel (3111) in the fifth figure represent the path of the ozone (8) entering the porous membrane tube (311). Due to the use of the operation mode 1 to control the pore size and pressure, the ozone (8) fills the porous membrane tube (311). The hollow channel (3111) is used for catalytic oxidation reaction. In addition, the double arrows in the hollow channel (3111) in the sixth figure represent the path for the ozone (8) to enter the porous membrane tube (311). Due to the use of operation mode 2 to control the pore size and pressure, the ozone entering the porous membrane tube (311) (8) Escape out of the porous membrane tube (311). Since ozone (8) generates oxygen free radicals through catalyst (3114), oxygen free radicals and water form hydroxyl radicals, and finally hydroxyl radicals destroy organic matter, so organic matter in wastewater can be decomposed into carbon dioxide and water.

Embodiment 3

The type of wastewater that can be treated by the present invention is not limited, such as chemical chelate wastewater, polyvinyl alcohol (PVA)-containing wastewater, phenol wastewater, dyeing and finishing wastewater, etc., the organic matter or metal content in the wastewater can be decomposed by the present invention. , and its efficacy verification results are as follows:

(1) Utilize the wastewater purification system containing catalyst membrane tube of the present invention to treat Sinopec Green Energy wastewater containing phenol. Please refer to Figure 7 for the results, which shows that the color of wastewater can be decomposed and the chemical oxygen demand (COD) value can be reduced , the COD value of the original solution was reduced from 18125 to 7650 after treatment, and the color was almost removed. If the COD value of the original solution was only 17925 by filtering (without ozone), it means that the system in this case can be used to treat phenol-containing wastewater.

(2) Utilize the waste water purification system containing catalyst membrane tube of the present invention to treat waste water containing molybdenum (Mo). The test result shows that the initial waste water contains about 68 ppm of molybdenum concentration. , SDDC) (heavy metal collector) treatment, the molybdenum concentration is reduced to about 1~2 ppm; if the wastewater is treated with this system and ozone before adding SDDC, the molybdenum concentration can be reduced to 0.4, the result is lower than the current EPA emission standard 0.6 ppm, which means that the system in this case can be used to treat molybdenum (Mo)-containing wastewater.

(3) The wastewater purification system containing catalyst membrane tube of the present invention is used to treat cobalt (Co) wastewater from TSMC, wherein the Co concentration department was commissioned by Professor Lai Zhenli from Jianan University of Pharmacology to use Inductively Coupled Plasma (ICP). Measurement. The test data shows that the untreated raw water contains Co concentration of 4.387 ppm; (a) the water sample treated with ozone, after adjusting the pH value to 13, and then filtered by the catalyst-containing membrane tube of the present invention, the water sample is 0.692 ppm; (b) the water sample treated with ozone, adjust the pH value to 13, and add 300 ppm SDDC, and then filter the water sample containing the catalyst membrane tube of the present invention as ND (<0.1 ppm) (detection concentration The value is 0.1 ppm), which means that the system in this case can be used to treat cobalt (Co)-containing wastewater.

As can be seen from the above-mentioned implementation description, the present invention compared with the prior art, the present invention has the following advantages:

1. In the present invention, the porous membrane tube is directly provided with a catalyst on the coating layer, so when ozone is in contact with the catalyst on the porous membrane tube, the oxidation catalytic reaction can be directly carried out.

2. The present invention can be used to treat different kinds of waste water to reduce chemical pollutants in waste water and remove color, so as to achieve the purpose of purifying waste water.

3. The present invention can control the content or residence time of ozone in the membrane tube module by adjusting the pore size of the filter hole to match different operating pressures, thereby controlling the catalytic oxidation reaction.

To sum up, the wastewater purification system with catalyst membrane tube of the present invention can indeed achieve the expected use effect through the above disclosed embodiments, and the present invention has not been disclosed before the application. The provisions and requirements of the Patent Law. It is indeed a virtue to file an application for an invention patent in accordance with the law.

However, the above-mentioned illustrations and descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention; those who are familiar with the art, based on the characteristic scope of the present invention, do other Equivalent changes or modifications should be considered as not departing from the design scope of the present invention.

1: Oxygen supply device

2: Ozone production machine

3: Membrane tube groove

3a: Water entry end

3b: water outlet

31: Membrane tube module

31a: first end

31b: second end

311: Porous membrane tube

3111: Hollow channel

3112: Braid

3113: Coating

3114: Catalyst

3115: filter hole

4: Water storage tank

41: water inlet

42: water outlet

43: Pipeline

5: Pump

51: Input terminal

52: output terminal

6: pH meter

7: Control Panel

8: Ozone

9: water flow

The first figure: a schematic structural diagram of the preferred implementation of the wastewater purification system with catalyst membrane tube according to the present invention.

The second figure: a perspective view of the preferred implementation of the membrane tube module of the present invention.

Figure 3: A cross-sectional view of the preferred implementation of the porous membrane tube of the present invention.

Figure 4: The preferred embodiment of the present invention is a schematic diagram of aeration of ozone through the porous membrane tube of the membrane tube module.

Figure 5: A schematic diagram of the operation mode one of the preferred embodiment of the present invention to make ozone stay in the porous membrane tube.

Figure 6: A schematic diagram of the second operation mode of the present invention, which makes ozone escape out of the porous membrane tube (dotted arrow).

Figure 7: Photographs of the present invention before and after treatment of waste water in its specific embodiment.

1: Oxygen supply device

2: Ozone production machine

3: Membrane tube groove

3a: Water entry end

3b: water outlet

31: Membrane tube module

31a: first end

31b: second end

311: Porous membrane tube

4: Water storage tank

41: water inlet

42: water outlet

43: Pipeline

5: Pump

51: Input terminal

52: output terminal

6: pH meter

7: Control Panel

Claims (9)

A waste water purification system containing a catalyst membrane tube, comprising: an ozone generator; A membrane tube tank has a water inlet end and an opposite water outlet end, and accommodates a membrane tube module. The membrane tube module has a first end connected to the ozone generator, an opposite second end, and a plurality of a plurality of porous membrane tubes, wherein each of the porous membrane tubes includes a hollow channel, a braided layer surrounding the hollow channel, a coating covering the braiding layer, and a plurality of catalysts arranged in the coating ; a water storage tank, which has a water inlet and a water outlet, wherein the water inlet is connected to the water outlet of the membrane tube tank by a pipeline; and A pump has an input end connected to the water outlet of the water storage tank, and an output end connected to the water inlet end of the membrane tube tank. The wastewater purification system with catalyst membrane tube as claimed in claim 1, wherein a pH meter is provided on the pipeline connecting the water outlet of the membrane tube tank to the water storage tank. The wastewater purification system containing catalyst membrane tubes according to claim 1, wherein each of the porous membrane tubes has a plurality of filter pores with a particle size of 0.22-10 μm. The wastewater purification system containing catalyst membrane tube as claimed in claim 1, wherein the plurality of catalysts are selected from manganese (Mn), iron (Fe), cobalt (Co), copper (Cu), zinc (Zn) ), nickel (Ni), titanium (Ti) or cerium (Ce) oxides. The wastewater purification system containing catalyst membrane tubes as claimed in claim 1, wherein the plurality of catalysts are composed of an active component and a carrier. The wastewater purification system containing a catalyst membrane tube as claimed in claim 5, wherein the active component is selected from the group consisting of manganese (Mn), iron (Fe), cobalt (Co), copper (Cu), and zinc (Zn) , oxides of nickel (Ni), titanium (Ti) or cerium (Ce), and the carrier is selected from activated alumina pellets, activated carbon, ceramsite, porous zeolite or graphene. The wastewater purification system containing a catalyst membrane tube as claimed in claim 1, wherein the braided layer is a polyester yarn layer, and the coating is selected from the group consisting of polyvinylidene fluoride (PVDF) membrane, polysilicon (PSF) ) film and the group consisting of cellulose acetate film. The wastewater purification system containing a catalyst membrane tube as claimed in claim 7, wherein the diameter of the hollow channel is 1-1.2 mm, the thickness of the braided layer is 0.4-0.6 mm, and the thickness of the coating layer is 0.1-0.2 mm mm. The wastewater purification system with catalyst membrane tube as claimed in claim 1, further comprising an oxygen supply device connected to the ozone generator to supply oxygen to produce ozone.

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