Printing and dyeing and industrial wastewater purification and micro-nano plastic removal device

Abstract

The utility model discloses a printing and dyeing and industrial wastewater purification and micro-nano plastic removal device. The device comprises a pH regulating tank, an oxidation tank, a filtering assembly, a stirring assembly and an adsorption assembly, sodium sulfate is added into the pH adjusting tank; the oxidation pond is provided with sodium hypochlorite, the filtering assembly comprises a filtering tank body, and wastewater is filtered through a filtering layer in the filtering tank body; the filtered wastewater enters the stirring assembly; a stirring motor in the stirring assembly is used for controlling a stirring shaft to rotate, turbine blades are driven to rotate and stir, and micro-nano plastic in water is fully adsorbed in a stirring mode in cooperation with a micro-nano plastic adsorbent added into a stirring container; by electrifying the electromagnet on one side of the stirring container and recycling the magnetic micro-nano plastic adsorbent, the micro-nano plastic and the added magnetic adsorbent in the wastewater can be removed, the wastewater purification and the micro-nano plastic removal can be efficiently realized at the same time, and the recycling and reutilization of water resources can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of printing and dyeing wastewater treatment, in particular to a printing and dyeing and industrial wastewater purification and micro-nano plastic removal device. Background Art

[0002] The purification of printing and dyeing wastewater is an important topic in the field of environmental protection and water resources management. The wastewater generated in the production process of the printing and dyeing industry contains a large amount of organic matter, pigments, acid and alkali substances and heavy metal ions, which cause serious pollution and damage to the environment and ecosystem. Therefore, the research and development of printing and dyeing wastewater purification technology is of great significance to reducing environmental pollution, saving water resources and protecting the ecological environment.

[0003] In the field of printing and dyeing wastewater purification, the main technologies involved include biological treatment technology, chemical treatment technology and physical treatment technology. These technologies purify wastewater and reduce the impact on the environment by oxidizing, degrading, precipitating, adsorbing and separating pollutants such as organic matter, pigments, acid and alkali substances and heavy metal ions in wastewater.

[0004] Microplastics have become a major environmental issue of global concern. With the deepening of research, nanoplastics have been found to be harmful at the cellular and molecular levels, and have a great negative impact on the growth, development and reproduction of organisms. Microplastics can continue to accumulate in the environment, adsorb and release harmful substances, which not only endangers the safety of the ecological environment, but also can enter the human body through the food chain and drinking water. Nanoplastics can even break through the gastrointestinal cell barriers of the human body and enter the human body circulation, which has great potential harm to human health. Microplastics have been listed as new pollutants. They are not only widely distributed in lakes, rivers and other water environments, but also difficult to decompose. They can survive in the environment for hundreds of years, and with the accumulation of time, the pollution continues to worsen. After printing and dyeing, artificial fiber polymers such as PET and other fabrics will bring a large amount of microplastic pollution to the printing and dyeing wastewater. Therefore, the removal of microplastics in printing and dyeing wastewater is also an urgent problem to be solved. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a printing and dyeing and industrial wastewater purification and micro-nano plastic removal device which can not only purify printing and dyeing wastewater and tap water, but also remove micro-nano plastics in the water, and has a high micro-nano plastic removal rate, low cost, green environmental protection, and is reusable.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a printing and dyeing and industrial wastewater purification and micro-nano plastic removal device, comprising a pH adjustment tank, an oxidation tank, a filtering component, a stirring component and an adsorption component;

[0007] The pH adjustment tank is used to precipitate suspended matter in the wastewater and adjust the pH value of the wastewater by adding sodium sulfate;

[0008] The oxidation pool is provided with sodium hypochlorite, which is used to oxidize and decompose organic matter, reduce the chromaticity of sewage, and kill bacteria and microorganisms in the water;

[0009] The filtering assembly comprises a filtering tank body, wherein a plurality of filtering areas are arranged inside the filtering tank body, and each filtering area is vertically arranged inside the filtering tank body, and the wastewater is filtered and processed by filtering materials arranged in different filtering areas; two groups of stirring assemblies are arranged in sequence in the vertical direction at the lower end of the filtering tank body, and the filtered wastewater will pass through the two groups of stirring assemblies in sequence;

[0010] The stirring assembly includes a stirring container, a stirring shaft, a stirring motor and a turbine blade. The stirring container is located at the lower end of the filter assembly, the stirring shaft is vertically located inside the stirring container, the stirring motor is located at the upper end of the stirring container, and the output end of the stirring motor is connected to the upper end of the stirring shaft. The turbine blade is installed on the outer wall of the stirring shaft. The stirring shaft is controlled to rotate by the stirring motor, thereby driving the turbine blade to rotate inside the stirring container. The wastewater inside the filter tank enters the stirring container after being filtered, and is stirred under the rotation of the turbine blade, and cooperates with the micro-nano plastic adsorbent added into the stirring container, thereby fully adsorbing the micro-nano plastic in the water by stirring.

[0011] An adsorption component is provided on one side of the stirring container below, and the adsorption component includes a shell and an electromagnet. The shell is located on one side of the stirring container below, and the electromagnet is located inside the shell. The electromagnet is installed on the outer wall of one side of the stirring container through the shell, and the electromagnet is energized to recover the magnetic micro-nano plastic adsorbent inside the stirring container, thereby removing the micro-nano plastic and the added magnetic adsorbent in the wastewater.

[0012] Preferably, the filtration area includes six layers, namely:

[0013] The first layer is the primary filtration area, which is equipped with a grid made of quartz sand to block large particles of pollutants;

[0014] The second layer is equipped with PP cotton as the first bedding area, which effectively removes the sediment, suspended matter, etc. in the wastewater;

[0015] The third layer is the acidified fly ash area, which contains fly ash acidified by sulfuric acid, and then preliminarily adsorbs dyes from printing and dyeing wastewater;

[0016] The fourth layer is the natural mineral filtration area, which is equipped with mixed powders of natural minerals, including bentonite and sepiolite powders, which are used to absorb inorganic and organic pollutants such as dyes and heavy metals;

[0017] The fifth layer is the ultraviolet disinfection area, which kills bacteria and microorganisms in the water through ultraviolet radiation;

[0018] The sixth layer is also equipped with activated carbon as the second bedding area to further remove organic matter, odor, color, colloids and other pollutants in the water to improve water quality.

[0019] Preferably, each layer of the internal structure of the filtering tank is arranged in sequence from top to bottom.

[0020] Preferably, the filter tank body is connected to the stirring container by a first connecting pipe, the upper end of the first connecting pipe is connected to the bottom end of the filter tank body, and the lower end of the first connecting pipe is connected to the upper end wall of the stirring container above, and the filtered wastewater enters the interior of the stirring container for preliminary stirring through the first connecting pipe.

[0021] Preferably, the two groups of stirring containers are connected by a second connecting pipe, the upper end of the second connecting pipe is connected to the lower end wall of the stirring container above, and the lower end of the second connecting pipe is connected to the upper end wall of the stirring container below. The wastewater after the initial stirring passes through the second connecting pipe into the stirring container below, and is stirred again to adsorb and remove micro-nano plastics in the water.

[0022] Preferably, the upper wall surface of the filter tank body is provided with a water inlet, and waste water is added into the filter tank body through the water inlet.

[0023] Preferably, a water outlet is provided on the lower end wall of the stirring container below, and the water after purification, filtration and removal of micro-nano plastics is discharged through the water outlet.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] 1. In the utility model, the purification device for printing and dyeing wastewater can effectively remove various organic and inorganic pollutants such as organic dyes and pigments, improve water color and odor problems, and improve water quality indicators such as chemical oxygen demand (COD), suspended solids, total organic carbon, biochemical oxygen demand (BOD), heavy metals, etc., while meeting environmental emission standards, realizing the recycling and reuse of water resources, and protecting the surrounding environment and aquatic ecosystem.

[0026] 2. Compared with traditional filtration, flocculation and biological treatment, the present invention introduces a micro-nano plastic treatment process while treating printing and dyeing and industrial wastewater, ensuring that the treated water will not cause secondary pollution. In terms of micro-nano plastics, a magnetic adsorbent is introduced, which has high adsorption capacity and high removal efficiency, and can effectively remove various types of nano plastics, with low treatment cost, green and environmental protection, and reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0028] In the attached picture:

[0029] Figure 1 It is a schematic diagram of the overall structure of the printing and dyeing and industrial wastewater purification and micro-nano plastic removal device of the utility model;

[0030] Figure 2 It is a schematic diagram of the structure inside the filter tank of the utility model;

[0031] Numbers in the figure: 101, primary filtration area; 102, first paving area; 103, acidified fly ash area; 104, natural mineral filtration area; 105, ultraviolet disinfection area; 106, second paving area; 107, filtration tank; 201, stirring container; 202, stirring shaft; 203, stirring motor; 204, turbine blades; 301, electromagnet; 2, pH adjustment tank; 3, oxidation tank; 4, first connecting pipe; 5, second connecting pipe; 6, water inlet; 7, water outlet. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] Example: Figure 1 and Figure 2 As shown, a printing and dyeing and industrial wastewater purification and micro-nano plastic removal device includes a pH adjustment tank 2, an oxidation tank 3, a filtering component, a stirring component and an adsorption component;

[0034] The filter assembly includes a filter tank 107, and a water inlet 6 is provided on the upper wall of the filter tank 107. Wastewater is added to the filter tank 107 through the water inlet 6. The filter tank 107 is provided with a plurality of filter areas, and each filter area is vertically arranged inside the filter tank 107. The wastewater is filtered by filter materials arranged in different filter areas. The filter area includes six layers, and each layer of the internal structure of the filter tank 107 is arranged in sequence from top to bottom, respectively:

[0035] The first layer is the primary filtration area 101, which is provided with a grid made of quartz sand to block large particles of pollutants;

[0036] The second layer is provided with PP cotton as the first bedding area 102, thereby effectively removing the silt, suspended matter, etc. in the wastewater;

[0037] The third layer is the acidified fly ash area 103, which is provided with fly ash acidified by sulfuric acid, and then the dyes of the printing and dyeing wastewater are initially adsorbed;

[0038] The fourth layer is a natural mineral filtration area 104, which is provided with mixed powder of natural minerals, including powder of bentonite and sepiolite, for absorbing inorganic and organic pollutants such as dyes and heavy metals;

[0039] The fifth layer is the ultraviolet disinfection area 105, which is equipped with ultraviolet lamps to remove bacteria and other microorganisms through ultraviolet radiation, and then transfer them to the sixth layer for filtration after they are eliminated;

[0040] The sixth layer is further provided with activated carbon as the second bedding area 106 to further remove pollutants such as organic matter, odor, color, colloid, etc. in the water to improve the water quality.

[0041] Two groups of stirring components are arranged in sequence in the vertical direction at the lower end of the filtering tank body 107. The filtered wastewater will pass through the two groups of stirring components in sequence. The two groups of stirring containers 201 are connected by a second connecting pipe 5, the upper end of the second connecting pipe 5 is connected to the lower end wall of the stirring container 201 above, and the lower end of the second connecting pipe 5 is connected to the upper end wall of the stirring container 201 below. The wastewater after the initial stirring passes through the second connecting pipe 5 and enters the stirring container 201 below, and is stirred again to absorb and remove micro-nano plastics in the water; the stirring component includes a stirring container 201, a stirring shaft 202, a stirring motor 203 and a turbine blade 204, the stirring container 201 is located at the lower end of the filtering component, the filtering tank body 107 and the stirring container 201 are connected by a first connecting pipe 4, the upper end of the first connecting pipe 4 is connected to the bottom end of the filtering tank body 107, and the lower end of the first connecting pipe 4 is connected to the upper end wall of the stirring container 201 above. The filtered wastewater enters the stirring container 201 for preliminary stirring through the first connecting pipe 4, the stirring shaft 202 is vertically located inside the stirring container 201, the stirring motor 203 is located at the upper end of the stirring container 201, and the output end of the stirring motor 203 is connected to the upper end of the stirring shaft 202, the turbine blade 204 is installed on the outer wall of the stirring shaft 202, the stirring motor 203 controls the rotation of the stirring shaft 202, and then drives the turbine blade 204 to rotate inside the stirring container 201, the wastewater inside the filtering tank 107 enters the stirring container 201 after being filtered, and is stirred under the rotation of the turbine blade 204, and cooperates with the micro-nano plastic adsorbent added into the stirring container 201, and then fully adsorbs the micro-nano plastic in the water by stirring, and the lower end wall of the stirring container 201 below is provided with a water outlet 7, and the water after purification, filtration and removal of micro-nano plastic is discharged through the water outlet 7;

[0042] An adsorption component is provided on one side of the stirring container 201 located below, and the adsorption component includes a shell and an electromagnet 301. The shell is located on the outer wall of one side of the stirring container 201 below, and the electromagnet 301 is located inside the shell. The electromagnet 301 is installed on the outer wall of one side of the stirring container 201 through the shell, and the electromagnet 301 is energized to adsorb and recover the magnetic micro-nano plastic adsorbent inside the stirring container 201, thereby removing the micro-nano plastic and the added magnetic adsorbent in the wastewater.

[0043] Specific working principle:

[0044] Step 1, the printing and dyeing wastewater is passed through the pH adjustment tank 2 and the oxidation tank 3 in sequence; sodium sulfate precipitates a large amount of floating matter that may be suspended in the industrial wastewater and adjusts the pH value; sodium hypochlorite oxidizes the organic matter, kills the microorganisms in the water, reduces the chromaticity of the water body, and prepares for the subsequent deep purification treatment;

[0045] Step 2, the printing and dyeing wastewater is put into the filter tank 107 through the water inlet 6 at the upper end of the stirring container 201, purified by the six-layer structure inside the filter tank 107, and passed into the stirring container 201 through the first connecting pipe 4;

[0046] Step 3, adding a magnetic micro-nano plastic adsorbent into the stirring container 201 of the micro-nano plastic solution to be removed, controlling the stirring shaft 202 to rotate by the stirring motor 203, thereby driving the turbine blade 204 to rotate in the stirring container 201, and the wastewater in the filter tank 107 enters the stirring container 201 after being filtered, and is fully stirred and mixed under the rotation of the turbine blade 204;

[0047] Step 4, the wastewater after preliminary stirring flows into the interior of the stirring container 201 below through the second connecting pipe 5 at the lower end of the stirring container 201, and the above steps are repeated;

[0048] Step 5, the electromagnet 301 placed outside the stirring container 201 is energized, so that the magnetic particles adsorbing the micro-nano plastics are quickly gathered on the side of the stirring container 201 close to the electromagnet 301, and the solution becomes clear within 3 minutes;

[0049] Step 6, maintaining the adsorption effect of the electromagnet 301, releasing the pure water after removing the micro-nano plastics, that is, achieving rapid and efficient removal of micro-nano plastics in printing and dyeing wastewater.

[0050] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A printing and dyeing and industrial wastewater purification and micro-nano plastic removal device, characterized by: It includes a pH adjustment tank, an oxidation tank, a filtration component, a stirring component and an adsorption component; The pH adjustment tank is used to precipitate suspended matter in the wastewater and adjust the pH value of the wastewater by adding sodium sulfate; The oxidation pool is provided with sodium hypochlorite, which is used to oxidize and decompose organic matter, reduce the chromaticity of sewage, and kill bacteria and microorganisms in the water; The filtering assembly comprises a filtering tank body, wherein a plurality of filtering areas are arranged inside the filtering tank body, and each filtering area is vertically arranged inside the filtering tank body, and the wastewater is filtered and processed by filtering materials arranged in different filtering areas; two groups of stirring assemblies are arranged in sequence in the vertical direction at the lower end of the filtering tank body, and the filtered wastewater will pass through the two groups of stirring assemblies in sequence; The stirring assembly includes a stirring container, a stirring shaft, a stirring motor and a turbine blade. The stirring container is located at the lower end of the filter assembly, the stirring shaft is vertically located inside the stirring container, the stirring motor is located at the upper end of the stirring container, and the output end of the stirring motor is connected to the upper end of the stirring shaft. The turbine blade is installed on the outer wall of the stirring shaft. The stirring shaft is controlled to rotate by the stirring motor, thereby driving the turbine blade to rotate inside the stirring container. The wastewater inside the filter tank enters the stirring container after being filtered, and is stirred under the rotation of the turbine blade, and cooperates with the micro-nano plastic adsorbent added into the stirring container, thereby fully adsorbing the micro-nano plastic in the water by stirring. An adsorption component is provided on one side of the stirring container below, and the adsorption component includes a shell and an electromagnet. The shell is located on one side of the stirring container below, and the electromagnet is located inside the shell. The electromagnet is installed on the outer wall of one side of the stirring container through the shell, and the electromagnet is energized to recover the magnetic micro-nano plastic adsorbent inside the stirring container, thereby removing the micro-nano plastic and the added magnetic adsorbent in the wastewater.

2. A printing and dyeing and industrial wastewater purification and micro-nano plastic removal device according to claim 1, characterized in that: The filtration area includes six layers, namely: The first layer is the primary filtration area, which is equipped with a grid made of quartz sand to block large particles of pollutants; The second layer is equipped with PP cotton as the first bedding area, which effectively removes the sediment and suspended matter in the wastewater; The third layer is the acidified fly ash area, which contains fly ash acidified by sulfuric acid, and then preliminarily adsorbs dyes from printing and dyeing wastewater; The fourth layer is the natural mineral filtration area, which is equipped with mixed powders of natural minerals, including bentonite and sepiolite powders, for adsorbing dyes and heavy metal inorganic and organic pollutants; The fifth layer is the ultraviolet disinfection area, which kills bacteria and microorganisms in the water through ultraviolet radiation; The sixth layer also has activated carbon as the second bedding area to further remove organic matter, odor, color, and colloidal pollutants in the water to improve water quality.

3. A printing and dyeing and industrial wastewater purification and micro-nano plastic removal device according to claim 2, characterized in that: Each layer of the internal structure of the filtering tank is arranged in sequence from top to bottom.

4. The device for purifying printing and dyeing and industrial wastewater and removing micro-nano plastics according to claim 1, characterized in that: The filtering tank body is connected to the stirring container via a first connecting pipe, the upper end of the first connecting pipe is connected to the bottom end of the filtering tank body, and the lower end of the first connecting pipe is connected to the upper end wall of the stirring container above. The filtered wastewater passes through the first connecting pipe and enters the interior of the stirring container for preliminary stirring.

5. The printing and dyeing and industrial wastewater purification and micro-nano plastic removal device according to claim 1 is characterized by: The two groups of stirring containers are connected by a second connecting pipe, the upper end of the second connecting pipe is connected to the lower end wall of the stirring container above, and the lower end of the second connecting pipe is connected to the upper end wall of the stirring container below. The wastewater after the initial stirring passes through the second connecting pipe into the stirring container below, and is stirred again to adsorb and remove micro-nano plastics in the water.

6. The printing and dyeing and industrial wastewater purification and micro-nano plastic removal device according to claim 1 is characterized by: The upper wall surface of the filter tank body is provided with a water inlet, and waste water is added into the filter tank body through the water inlet.

7. The printing and dyeing and industrial wastewater purification and micro-nano plastic removal device according to claim 1 is characterized by: A water outlet is provided on the lower end wall of the stirring container below, and the water after purification, filtration and removal of micro-nano plastics is discharged through the water outlet.

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