TWM604782U - Waste water recycling equipment - Google Patents

Abstract

This creation discloses a waste water recovery equipment, which includes a coagulation tank, a gelation tank, a solid-liquid separation device, an oxidation tank, a reduction tank and a filtering device, wherein the gelation tank is connected with the coagulation tank, and the solid-liquid The separation device is in communication with the gelation tank, the oxidation tank is in communication with the solid-liquid separation device, the reduction tank is in communication with the oxidation tank, and the filter device is in communication with the reduction tank. The wastewater recycling equipment of this creation introduces an oxidation tank and a reduction tank. The oxidation tank can decompose the polymer gelling agent present in the wastewater into small molecules, and the reduction tank can reduce the remaining oxidizing substances, thus reducing waste water Recover costs while increasing economic benefits.

Description

Wastewater recovery equipment

This creation relates to a waste water recycling equipment, in particular to a waste water recycling equipment that can improve the efficiency of waste water recycling.

The demand for water resources in Taiwan has been increasing in recent years. As far as high-tech industrial water is concerned, the current water consumption of the Hsinchu Science Industrial Park reaches 125,000 tons in a single day, which is an astonishing amount. However, climate change has made the supply of water resources unpredictable. In addition to reducing water consumption, the solution is to effectively treat and recycle industrial wastewater.

In addition, wastewater treatment is also a very important environmental issue, especially for industrial wastewater that is more hazardous. Industrial wastewater can be divided into two types: inorganic wastewater containing mainly inorganic pollutants and organic wastewater containing mainly organic pollutants; in order to avoid environmental pollution, various types of wastewater must be treated to meet the prescribed water quality standards. Can be discharged or reused.

Solid-liquid separation is an essential part of wastewater treatment. In order to improve the efficiency of solid-liquid separation, a common method is to add a polymer gelling agent to the wastewater to promote the agglomeration of smaller solids into larger and heavier solids; However, polymer gelling agents can easily block filter elements (such as filter membranes), resulting in reduced filtration efficiency, slower filtration speed, and ineffective removal of pollutants.

Therefore, how to improve the filterability of wastewater by improving the structural design to overcome the above-mentioned shortcomings has become one of the important issues to be solved by this business.

The technical problem to be solved by this creation is to provide a waste water recovery equipment in view of the shortcomings of the existing technology, which can perform redox treatment on the waste water to accelerate the destruction of the polymer gelling agent structure and achieve high efficiency filtration. Recycling equipment is more economical.

In order to solve the above technical problems, one of the technical solutions adopted in this creation is to provide a waste water recycling equipment, which includes a coagulation tank, a gelation tank, a solid-liquid separation device, an oxidation tank, a reduction tank, and a filter. The coagulation tank is used to treat a waste water through a coagulant; the gelation tank is connected to the coagulation tank, and is used to treat the waste water treated by the coagulation tank through a gelling agent; The solid-liquid separation device is in communication with the gelation tank to remove solid substances in the wastewater treated by the gelation tank; the oxidation tank is in communication with the solid-liquid separation device to pass an oxidation Treatment of the wastewater treated by the solid-liquid separation device to deconstruct the gelling agent therein; the reduction tank is connected to the oxidation tank for treating the wastewater by a reducing substance The waste water treated by the tank to reduce the oxidizing substances remaining therein; the filtering device is in communication with the reduction tank.

Furthermore, the filtering device is used to filter the waste water treated by the reduction tank to obtain a recycled water.

Furthermore, the wastewater recovery equipment further includes a reverse osmosis device, the reverse osmosis device communicates with the filter device, and is used to purify the recovered water.

Furthermore, the wastewater recovery equipment further includes a biological treatment device, and the filter device is connected to the reduction tank through the biological treatment device, wherein the biological treatment device is used to remove microorganisms through the reduction tank Organic pollutants in the treated wastewater, and the filtering device is used for filtering the wastewater treated by the biological treatment device to obtain a recycled water.

Furthermore, the wastewater recovery equipment further includes a reverse osmosis device, the reverse osmosis device communicates with the filter device, and is used to purify the recovered water.

Furthermore, the solid-liquid separation device is a precipitation tank or a floatation tank.

Furthermore, the filtration device is a microfiltration device or an ultrafiltration device.

Furthermore, the oxidizing substance is a chlorine-containing oxidizing substance or a sulfur-containing oxidizing substance.

Furthermore, the chlorine-containing oxidizing substance is sodium hypochlorite, chloric acid or perchloric acid.

Further, the sulfur-containing oxidizing substance is sodium persulfate or potassium persulfate.

Furthermore, the reducing substance is sodium bisulfite, sodium sulfite, potassium sulfite or potassium bisulfite.

One of the beneficial effects of this creation is that the wastewater recycling equipment provided by this creation has introduced an oxidation tank and a reduction tank. The oxidation tank can decompose the polymer gelling agent present in the wastewater into small molecules, and the reduction tank The remaining oxidizing substances can be reduced, so the filterability of wastewater can be improved, so as to reduce the processing burden of the filter device, and avoid blocking and failure of the filter device too quickly, so as to reduce the waste water recovery cost and increase economic benefits.

In order to have a better understanding of the features and technical content of this creation, please refer to the following detailed descriptions and drawings about this creation. However, the provided drawings are only for reference and explanation, not to limit this creation.

The following is a specific specific embodiment to illustrate the implementation of the "waste water recovery equipment" disclosed in this creation. Those skilled in the art can understand the advantages and effects of this creation from the content disclosed in this specification. This creation can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this creation. In addition, the drawings in this creation are merely schematic illustrations, and are not depicted in actual size, and are stated in advance. The following embodiments will further describe the related technical content of this creation in detail, but the disclosed content is not intended to limit the protection scope of this creation. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

Please refer to Figure 1. The first embodiment of this creation provides a waste water recovery equipment Z1, which is suitable for the recovery of inorganic waste water; as shown in Figure 1, the waste water recovery equipment Z1 mainly includes a coagulation tank 1, a gelation tank 2, A solid-liquid separation device 3, an oxidation tank 4, a reduction tank 5 and a filter device 6, wherein the gelation tank 2 is connected to the coagulation tank 1, the solid-liquid separation device 3 is connected to the gelation tank 2, and the oxidation tank 4 is connected to The solid-liquid separation device 3 is in communication, the reduction tank 5 is in communication with the oxidation tank 4, and the filter device 6 is in communication with the reduction tank 5.

Furthermore, the waste water to be treated is first transported to the coagulation tank 1 for coagulation treatment, which is to add a coagulant to the waste water to remove small particles of solids (such as Colloidal particles) are electrically neutralized. The coagulant may use polybasic aluminum chloride, aluminum sulfate, ferric chloride, ferrous chloride, or ferrous sulfate, but is not limited thereto. In practical application, the waste water to be treated can be concentrated in a temporary storage tank (not shown in the figure), and when the liquid level in the tank reaches a high level, the pump is started for transportation.

Next, the waste water treated by coagulation tank 1 will be transported to gelation tank 2 for gelation treatment, which is to add a polymer gelling agent to the waste water to aggregate the dispersed small solids to form large particles Solids, making it easier to separate from wastewater. The polymer gelling agent may use acrylamides or acrylates, but is not limited thereto. In practical applications, the gelation tank 2 can be connected to the coagulation tank 1 through a pipe P1.

Thereafter, the waste water treated by the gelling tank 2 will be transported to the solid-liquid separation device 3 for solid-liquid separation to separate large solids from the waste water to achieve a certain degree of separation of solid pollutants and water. The solid-liquid separation device 3 can be a precipitation tank or a floatation tank, but is not limited to this. In practical applications, the solid-liquid separation device 3 can be connected to the gelation tank 2 through a pipe P2.

After that, the wastewater treated by the solid-liquid separation device 3 will be transported to the oxidation tank 4 for oxidation treatment, which is to add an oxidizing substance to the wastewater to decompose the polymer gelling agent into small molecules, thereby reducing subsequent The burden of filtering. The oxidizing substance can be a chlorine-containing oxidizing substance or a sulfur-containing oxidizing substance, but is not limited to this; specific examples of the chlorine-containing oxidizing substance include sodium hypochlorite, chloric acid and perchloric acid, specific examples of the sulfur-containing oxidizing substance Including sodium persulfate and potassium persulfate. In practical applications, the oxidation tank 4 can be connected to the solid-liquid separation device 3 through a pipe P3, and an agitator can be provided in the oxidation tank 4.

Thereafter, the wastewater treated by the oxidation tank 4 will be transported to the reduction tank 5 for reduction treatment, which is to add a reducing substance to the wastewater to reduce the remaining oxidizing substance. The reducing substance may use sodium bisulfite, sodium sulfite, potassium sulfite, or potassium bisulfite, but is not limited thereto. In practical application, the reduction tank 5 can be connected to the oxidation tank 4 through a pipe P4, and a stirrer can be provided in the reduction tank 5. It is worth mentioning that the wastewater recycling equipment Z1 of this creation can accelerate the destruction of the polymer gelling agent structure and improve the filterability of wastewater due to the introduction of oxidation tank 4 and reduction tank 5.

Finally, the wastewater treated by the reduction tank 5 will be transported to the filtering device 6 for filtering to obtain recycled water that meets the prescribed water quality standards for the purpose. The filtration device 6 can be a micro filtration device or an ultra filtration device, but is not limited thereto. In actual application, the filter device 6 can be connected to the reduction tank 5 through a pipe P5.

As shown in Figure 2, according to actual needs, the wastewater recovery equipment Z1 may further include a reverse osmosis device 7, which uses reverse osmosis membranes to process the filtered recovered water to remove ionic impurities in the recovered water to achieve the goal of purifying the recovered water. effect. In actual application, the reverse osmosis device 7 can be connected to the filter device 6 through a pipe P6.

[Second Embodiment]

Please refer to Figure 3, the second embodiment of the present creation provides a wastewater recovery equipment Z2, which is suitable for the treatment of organic wastewater; as shown in Figure 3, the wastewater recovery equipment Z2 mainly includes a coagulation tank 1, a gelation tank 2, A solid-liquid separation device 3, an oxidation tank 4, a reduction tank 5, a filter device 6, and a biological treatment device 8, wherein the gelation tank 2 is connected to the coagulation tank 1, and the solid-liquid separation device 3 is connected to the gelation tank 2. Connected, the oxidation tank 4 is in communication with the solid-liquid separation device 3, the reduction tank 5 is in communication with the oxidation tank 4, and the filter device 6 is in communication with the reduction tank 5 through the biological treatment device 8.

The main difference between this embodiment and the first embodiment is that the wastewater recovery equipment Z2 includes a biological treatment device 8 for removing organic pollutants in the wastewater treated by the reduction tank 5 through microorganisms. Furthermore, the biological treatment device 8 uses microorganisms to metabolically decompose the organic pollutants in the wastewater and convert them into harmless biological sludge. In actual application, the biological treatment device 8 can be connected to the reduction tank 5 through a pipe P51, and the filter device 6 can be connected to the biological treatment device 8 through a pipe P52 to filter the wastewater treated by the biological treatment device 8 to obtain compliance with regulations. The purpose of the water quality standard is the recycled water.

4, according to actual needs, the wastewater recovery equipment Z2 may further include a reverse osmosis device 7, which uses a reverse osmosis membrane to process the filtered recovered water to remove impurities in the recovered water, and achieve the effect of purifying the recovered water. In actual application, the reverse osmosis device 7 can communicate with the filter device 6 through a pipe P7.

[Filterability test]

[Comparative Example 1]

Mix 0.2% negative PAM (polypropylene amide, with an average molecular weight of 12 million) aqueous solution A in reverse osmosis water to form a 100 ppm water sample A; then, use a filter paper with a pore size of 1 micron at -0.48 bar ( It takes 42 seconds to filter 500 ml of water sample A under the pressure of bar).

[Experimental example 1]

A 0.2% negative PAM (polypropylene amide, average molecular weight of 12 million) aqueous solution A was mixed with reverse osmosis water to prepare 100 ppm aqueous solution B; then, sodium hypochlorite was added to aqueous solution B at a content of 1000 ppm to react After 15 minutes, the water sample B is obtained; then, using a filter paper with a pore size of 1 micron, 500 ml of water sample B is filtered under a pressure of -0.48 bar (bar), and the required time is 21 seconds.

[Experimental example 2]

A 0.2% negative PAM (polypropylene amide, average molecular weight of 12 million) aqueous solution A was mixed in reverse osmosis water to prepare 100 ppm aqueous solution B; then, sodium persulfate was added to aqueous solution B at a content of 1000 ppm The reaction was carried out for 15 minutes, and after completion, a water sample C was obtained; then, using a filter paper with a pore size of 1 micron, 500 ml of water sample C was filtered under a pressure of -0.48 bar (bar), and the required time was 9 seconds.

It can be seen from the above that when the water contains high molecular polymers, the filtering speed of the filter paper is slower, which increases the filtering burden of the filter paper. In contrast, before filtering, add chlorine or sulfur oxidizing substances to reduce the high Molecular polymers are decomposed into small molecules, and the time required for filtration can be reduced by more than half.

[Beneficial effects of the embodiment]

One of the beneficial effects of this creation is that the wastewater recycling equipment provided by this creation has introduced an oxidation tank and a reduction tank. The oxidation tank can decompose the polymer gelling agent present in the wastewater into small molecules, and the reduction tank The remaining oxidizing substances can be reduced, so the filterability of wastewater can be improved, so as to reduce the processing burden of the filter device, and avoid blocking and failure of the filter device too quickly, so as to reduce the waste water recovery cost and increase economic benefits.

Furthermore, in the presence of the oxidation tank and the reduction tank, the ease of operation and reliability of the wastewater recycling equipment of this invention have been improved.

The content disclosed above is only a preferred and feasible embodiment of the creation, and does not limit the scope of the patent application for this creation. Therefore, all equivalent technical changes made using the creation specification and schematic content are included in the application for this creation. Within the scope of the patent.

Z1, Z2: Wastewater recovery equipment 1: coagulation tank 2: Gelling tank 3: Solid-liquid separation device 4: Oxidation tank 5: Reduction tank 6: Filtering device 7: Reverse osmosis device 8: Biological treatment device P1, P2, P3, P4, P5, P51, P52, P6: Piping

Figure 1 is a schematic diagram of the wastewater recovery equipment of the first embodiment of the creation.

Figure 2 is another schematic diagram of the waste water recovery equipment of the first embodiment of the creation.

Fig. 3 is a schematic diagram of the wastewater recovery equipment according to the second embodiment of the creation.

Fig. 4 is another schematic diagram of the wastewater recovery equipment of the second embodiment of the creation.

Z1: Wastewater recovery equipment

1: coagulation tank

2: Gelling tank

3: Solid-liquid separation device

4: Oxidation tank

5: Reduction tank

6: Filtering device

P1, P2, P3, P4, P5: Piping

Claims (11)

A waste water recycling equipment, including: A coagulation tank for treating a wastewater through a coagulant; A gelling tank connected to the coagulation tank and used to treat the wastewater treated by the coagulation tank with a gelling agent; A solid-liquid separation device, connected to the gelation tank, for removing solid substances in the wastewater treated by the gelation tank; An oxidation tank, which is connected to the solid-liquid separation device, and is used to treat the wastewater treated by the solid-liquid separation device with an oxidizing substance to deconstruct the gelling agent therein; A reduction tank connected to the oxidation tank for treating the waste water treated by the oxidation tank with a reducing substance to reduce the oxidizing substance remaining therein; and A filter device is connected with the reduction tank. According to the waste water recycling equipment according to claim 1, the filtering device is used to filter the waste water processed by the reduction tank to obtain a recycled water. The wastewater recovery equipment according to claim 2, further comprising a reverse osmosis device, the reverse osmosis device is connected with the filter device, and is used to purify the recovered water. The waste water recycling equipment according to claim 1, further comprising a biological treatment device, and the filter device is connected to the reduction tank through the biological treatment device, wherein the biological treatment device is used to remove all materials by microorganisms. The organic pollutants in the wastewater treated by the reduction tank, and the filtering device is used for filtering the wastewater treated by the biological treatment device to obtain a recycled water. The wastewater recovery equipment according to claim 4, further comprising a reverse osmosis device, the reverse osmosis device is connected with the filter device, and is used to purify the recovered water. The wastewater recovery equipment according to claim 1, wherein the solid-liquid separation device is a sedimentation tank or a floatation tank. The wastewater recycling equipment according to claim 1, wherein the filtering device is a micro filtering device or an ultra filtering device. The wastewater recovery equipment according to claim 1, wherein the oxidizing substance is a chlorine-containing oxidizing substance or a sulfur-containing oxidizing substance. The wastewater recovery equipment according to claim 8, wherein the chlorine-containing oxidizing substance is sodium hypochlorite, chloric acid or perchloric acid. The wastewater recovery equipment according to claim 8, wherein the sulfur-containing oxidizing substance is sodium persulfate or potassium persulfate. The wastewater recovery equipment according to claim 1, wherein the reducing substance is sodium bisulfite, sodium sulfite, potassium sulfite or potassium bisulfite.

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