Integrated micro-plastic wastewater treatment and resource utilization device

Abstract

The utility model provides an integrated micro plastic wastewater treatment and its resource utilization device, including coagulation tank, dewatering machine, ball mill, calcinator, premixing pool and fluidized bed, coagulation tank, dewatering machine, ball mill, calcinator are connected in proper order, coagulation tank, premixing pool, fluidized bed are connected in proper order, the utility model discloses through coagulation tank to the effective enrichment of micro plastic, subsequently transforms into heterogeneous fenton catalyst, fills in fluidized bed, is used for the purification removal of organic matter wastewater, the utility model discloses device reasonable in design, and simple in use process, not only can satisfy the efficient treatment of micro plastic wastewater, realizes the resource utilization of micro plastic waste simultaneously, has higher economic value and application prospect, and is suitable for industrialization large -scale production.

Description

Technical Field

[0001] This utility model belongs to the field of environmental pollutant resource utilization technology, and relates to a microplastic wastewater treatment and resource utilization device. Background Technology

[0002] Coagulation, as a relatively mature technology in wastewater treatment plants, has advantages such as simple operation, high efficiency, low cost, and low pollution. It can aggregate fine microplastic particles in water into large flocs, thereby achieving effective separation of microplastics. Meanwhile, plastics are carbon-rich materials, showing great potential for conversion into carbon materials. Based on this, this invention proposes an integrated microplastic wastewater treatment and subsequent resource utilization device. While effectively recovering and enriching microplastics, it upgrades them into high-value-added catalyst products for the effective degradation of various organic pollutants in water. Utility Model Content

[0003] The purpose of this invention is to provide an integrated microplastic wastewater treatment and resource utilization device. This device separates and precipitates microplastics from wastewater through coagulation, thereby effectively purifying the wastewater. At the same time, it upgrades the separated microplastics into a high-value-added catalyst product for the effective degradation of various organic pollutants in water.

[0004] This utility model is achieved through the following technical solution.

[0005] The present invention discloses an integrated microplastic wastewater treatment and resource utilization device, comprising a coagulation tank (1), a dewatering machine (2), a ball mill (3), a calcining furnace (4), a premixing tank (5), and a fluidized bed (6). The coagulation tank (1), the dewatering machine (2), the ball mill (3), and the calcining furnace (4) are connected in sequence; the coagulation tank (1), the premixing tank (5), and the fluidized bed (6) are connected in sequence.

[0006] The coagulation tank (1) is equipped with a stirring rod and a scraper for stirring wastewater and collecting microplastic flocs. The front end of the coagulation tank (1) is equipped with an inlet for the microplastic wastewater to enter. The rear end is equipped with an outlet for discharging the water after preliminary coagulation and purification. The bottom of the coagulation tank (1) is equipped with a discharge port, which is connected to the inlet of the dewatering machine (2) through a discharge pipe.

[0007] The dewatering machine (2) includes a feed inlet, a feed pump, a propeller, a spiral blade and a discharge outlet. The feed inlet is connected to the discharge outlet of the coagulation tank (1) through a discharge pipe. A feed pump is set at the rear end of the feed inlet. The propeller and spiral blade are set inside the dewatering machine for rotating, squeezing and propelling the microplastic flocs.

[0008] The ball mill (3) includes a ball mill jar and ball mill beads. The feed inlet of the ball mill (3) is connected to the discharge outlet of the dewatering machine (2).

[0009] The calcining furnace (4) is connected to the rear of the ball mill.

[0010] The premixing tank (5) is connected to the outlet of the coagulation tank (1) through a pipe. The outlet of the premixing tank (5) is connected to the inlet of the bottom of the fluidized bed (6) through a pipe. The fluidized bed (6) is filled with a column for filling the catalyst synthesized in the calcining furnace (4).

[0011] Preferably, the ball mill (3) may be equipped with a feeder for adding reagents.

[0012] Preferably, the calcining furnace (4) may be equipped with a temperature regulator to adjust the temperature required for synthesizing different catalysts, so as to synthesize catalysts with different properties.

[0013] This invention relates to the treatment and resource utilization of microplastic wastewater. Specifically, it includes the following steps:

[0014] (1) Microplastic wastewater is introduced into the coagulation tank inlet. An appropriate amount of flocculant iron salt is added to the coagulation tank. A stirring rod is used to stir the wastewater to make it completely dissolved. Then, sodium hydroxide solution (1 mol / L) is added dropwise to adjust the pH of the solution to neutral. The solution is left to stand for 3 hours. When the microplastic flocs have completely settled, the supernatant is discharged from the coagulation tank for further processing. The settled microplastic flocs are transported to the dewatering machine through the discharge port for further processing.

[0015] (2) The microplastic flocs generated in step (1) are transported to the dewatering machine. After entering the equipment, they are pushed into the filter chamber by a low-speed rotating screw shaft. Then the speed of the screw shaft gradually increases to effectively dewater the microplastic flocs. The dewatered microplastic flocs are then transported to the ball mill.

[0016] (3) The microplastic flocs after dehydration in step (2) are transported to a ball mill for ball milling, where reagents may be added for material modification.

[0017] (4) The microplastic flocculants processed in step (3) are transported to a calcining furnace for oxygen-free carbon heat treatment. 2 The temperature was raised to the specified temperature at a heating rate of 10 °C / min under an atmospheric pressure and held for 120 min. After cooling in a calcining furnace, the mixture was ground, and the resulting black powder was used as a catalyst in a fluidized bed for wastewater treatment.

[0018] Based on the above application methods, the obtained catalyst achieves a continuous removal efficiency of over 98% for bisphenol A (BPA) in a fluidized bed system under continuous flow operation conditions.

[0019] The beneficial results of this utility model.

[0020] (1) This utility model follows the concept of “treating waste with waste”, effectively removing microplastics from water through coagulation, and then upgrading the microplastics into catalyst products for wastewater treatment, providing a sustainable strategy for the resource utilization of microplastics.

[0021] (2) In addition, the catalyst synthesized by this invention shows great application potential in wastewater treatment. Under continuous flow operation conditions, the fluidized bed system has a continuous removal efficiency of more than 98% for bisphenol A (BPA), showing great potential in practical water purification applications.

[0022] (3) This utility model provides an integrated microplastic enrichment and heterogeneous catalyst preparation equipment, which not only meets the high-efficiency treatment of microplastic wastewater, but also realizes the resource utilization of enriched microplastic waste, and has high economic value and application prospects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the integrated microplastic wastewater treatment and resource utilization device of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1-coagulation tank; 2-dehydrator; 3-ball mill; 4-calcining furnace; 5-premixing tank; 6-fluidized bed Detailed Implementation

[0025] This utility model will be further explained in conjunction with the accompanying drawings and through embodiments.

[0026] See Figure 1 The present invention relates to an integrated microplastic wastewater treatment and resource utilization device, comprising a coagulation tank 1, a dewatering machine 2, a ball mill 3, a calcining furnace 4, a premixing tank 5, and a fluidized bed 6. The coagulation tank 1, dewatering machine 2, ball mill 3, and calcining furnace 4 are connected in sequence; the coagulation tank 1, premixing tank 5, and fluidized bed 6 are connected in sequence.

[0027] The coagulation tank 1 is equipped with a stirring rod and a scraper for stirring wastewater and collecting microplastic flocs. The front end of the coagulation tank 1 has an inlet for the microplastic wastewater to enter. The rear end has an outlet for discharging the water after preliminary coagulation and purification. The bottom of the coagulation tank 1 has a discharge port, which is connected to the inlet of the dewatering machine 2 through a discharge pipe.

[0028] The dewatering machine 2 includes a feed inlet, a feed pump, a propeller, spiral blades, and a discharge outlet. The feed inlet is connected to the discharge outlet of the coagulation tank 1 through a discharge pipe. A feed pump is installed at the rear end of the feed inlet. The propeller and spiral blades are installed inside the dewatering machine for rotating, squeezing, and propelling the microplastic flocs.

[0029] The ball mill 3 includes a ball mill jar and ball mill beads, and the feed inlet of the ball mill 3 is connected to the discharge outlet of the dewatering machine 2.

[0030] The calcining furnace 4 is located behind the ball mill;

[0031] The premixing tank 5 is connected to the outlet at the rear end of the coagulation tank 1 via a pipe. The outlet of the premixing tank 5 is connected to the inlet at the bottom of the fluidized bed 6 via a pipe. The fluidized bed 6 is equipped with a packing column for filling the catalyst synthesized in the calcining furnace 4.

[0032] In one embodiment of this utility model, the ball mill 3 may be equipped with a dosing machine for adding reagents;

[0033] In one embodiment of this invention, the calcining furnace 4 can be set to different temperatures to adjust the performance of the synthesis catalyst.

[0034] An application example of microplastic wastewater treatment and its resource utilization includes the following steps:

[0035] (1) Microplastic wastewater is introduced into the coagulation tank inlet. An appropriate amount of flocculant iron salt is added to the coagulation tank. A stirring rod is used to stir the wastewater to make it completely dissolved. Then, sodium hydroxide solution (1 mol / L) is added dropwise to adjust the pH of the solution to neutral. The solution is left to stand for 3 hours. When the microplastic flocs have completely settled, the supernatant is discharged from the coagulation tank for further processing. The settled microplastic flocs are transported to the dewatering machine through the discharge port for further processing.

[0036] (2) The microplastic flocs generated in step (1) are transported to the dewatering machine. After entering the equipment, they are pushed into the filter chamber by a low-speed rotating screw shaft. Then the speed of the screw shaft gradually increases to effectively dewater the microplastic flocs. The dewatered microplastic flocs are then transported to the ball mill.

[0037] (3) The microplastic flocs after dehydration in step (2) are transported to a ball mill for ball milling, where reagents may be added for material modification.

[0038] (4) The microplastic flocculants processed in step (3) are transported to a calcining furnace for oxygen-free carbon heat treatment. 2 The temperature was raised to 750°C, 850°C, or 950°C (three example schemes) at a heating rate of 10°C / min under an atmosphere and held for 120 min. After cooling in a calcining furnace, the mixture was ground, and the resulting black powder was used as a catalyst to fill a fluidized bed for wastewater treatment.

[0039] Examples demonstrate that, using the integrated microplastic wastewater treatment and resource utilization device of the present invention, in three implementation schemes, the fluidized bed system achieves a continuous removal efficiency of over 98% for bisphenol A (BPA) under continuous flow operation conditions of 5 hours, 9 hours, and 4 hours.

[0040] Although the specific embodiments of this utility model have been described in detail above, it will be apparent to those skilled in the art that various adjustments and innovations can be made to these embodiments. However, it should be clarified that all such adjustments and innovations should be considered to fall within the scope and spirit of the invention as defined in the claims. Furthermore, this utility model is not limited to the embodiments described herein; other feasible implementations exist and can be practiced or achieved through diverse means.

Claims

1. An integrated microplastic wastewater treatment and resource utilization device, characterized in that It includes a coagulation tank (1), a dewatering machine (2), a ball mill (3), a calcining furnace (4), a premixing tank (5), and a fluidized bed (6); the coagulation tank (1), the dewatering machine (2), the ball mill (3), and the calcining furnace (4) are connected in sequence; the coagulation tank (1), the premixing tank (5), and the fluidized bed (6) are connected in sequence. The coagulation tank (1) is equipped with a stirring rod and a scraper to stir the wastewater and collect microplastic flocs. The front end of the coagulation tank (1) is equipped with a microplastic wastewater inlet, and the rear end is equipped with an outlet for discharging the water after preliminary coagulation and purification. The bottom of the coagulation tank (1) is equipped with a discharge port. The dewatering machine (2) includes a feed inlet, a feed pump, a propeller, a spiral blade and a discharge outlet. The feed inlet is connected to the discharge outlet of the coagulation tank (1) through a discharge pipe. A feed pump is set at the rear end of the feed inlet. The propeller and spiral blade are set inside the dewatering machine for rotating, squeezing and propelling the microplastic flocs. The ball mill (3) includes a ball mill jar and ball mill beads, and the feed inlet of the ball mill (3) is connected to the discharge outlet of the dewatering machine (2); The calcining furnace (4) is connected to the rear of the ball mill; The premixing tank (5) is connected to the outlet of the coagulation tank (1) through a pipe. The outlet of the premixing tank (5) is connected to the inlet of the bottom of the fluidized bed (6) through a pipe. The fluidized bed (6) is equipped with a packing column for filling the catalyst synthesized in the calcining furnace (4).

2. The integrated microplastic wastewater treatment and resource utilization device according to claim 1, characterized in that: The ball mill (3) is equipped with a feeder for adding reagents.

3. The integrated microplastic wastewater treatment and resource utilization device according to claim 1, characterized in that: The calcining furnace (4) is equipped with a temperature regulator.

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