An industrial wastewater treatment apparatus

Abstract

The utility model discloses an industrial wastewater treatment equipment, including pool body, including through the baffle separation and the pH adjustment area, coagulation area, flocculation area, slag area and clear water area that arrange set gradually, and flocculation area is equipped with pH meter, a plurality of automatic dosing unit, reaction stirring structure is located in the pH adjustment area, and reaction processing structure includes reflux pump, pressure dissolving tank, ozone generator, air compressor, nanometer microbubble release ware. Air compressor supplies air to ozone generator, and the ozone that generates is sent into pressure dissolving tank and mixes with reflux clear water and forms gas dissolving water, and then high density ozone nanometer gas bubble is released in flocculation area through nanometer microbubble release ware, realizes oxidation and flotation. Can remove the suspended solids and colority in water according to the water quality characteristics, improves the processing efficiency, and the operation maintenance cost is low, and the treatment effect is good.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an industrial wastewater treatment device. Background Technology

[0002] In recent years, industrial wastewater treatment has faced severe challenges, especially the pretreatment of high-color, recalcitrant organic wastewater, which is difficult and costly. While widely used advanced oxidation technologies such as the Fenton process have shown some effectiveness, they suffer from problems such as high sludge production, strict pH control, equipment corrosion, and high operating costs.

[0003] Traditional air flotation processes (such as dissolved air flotation, DAF) are mainly used to separate suspended solids and oils, but the resulting bubbles are relatively large, resulting in poor removal of dissolved organic matter and color, and their function is limited. On the other hand, ozone oxidation alone has drawbacks such as low ozone utilization and low reaction efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an industrial wastewater treatment device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0006] This utility model provides an industrial wastewater treatment device, including a tank body, comprising a pH adjustment zone, a coagulation zone, a flocculation zone, a sludge discharge zone, and a clear water zone, separated by a partition and arranged sequentially. The pH adjustment zone is located at the inlet end. The partition between the pH adjustment zone and the coagulation zone has an inlet. The upper parts of the coagulation zone and the flocculation zone are connected. The partition between the sludge discharge zone and the clear water zone has an outlet. The clear water zone is located at the outlet end. The flocculation zone is equipped with a pH meter. Multiple automatic dosing units are included. A reaction stirring structure is located at the pH adjustment zone. The regulating zone and reaction processing structure include a reflux pump, a pressure dissolved gas tank, an ozone generator, an air compressor, and a nano-microbubble releaser. The air compressor is connected to the ozone generator, which is connected to the pressure dissolved gas tank unit for injecting ozone into the tank. The pressure dissolved gas tank unit is connected to the nano-microbubble release unit via a pipeline for releasing ozone-containing nano-microbubbles to the ozone flotation reaction zone. The reflux pump is connected to both the clear water zone and the pressure dissolved gas tank. A scum scraper is located in the flocculation zone to scrape scum to the scum discharge zone.

[0007] The beneficial effects of this utility model are:

[0008] An air compressor supplies air to the ozone generator, and the generated ozone is sent to a pressurized dissolved air tank to mix with return clean water to form dissolved air water. This dissolved air water is then released as high-density ozone nanobubbles in the flocculation zone via a nano-microbubble releaser, achieving oxidation and flotation. A scum scraper is located on the surface of the flocculation zone to remove scum. The PLC automatic control system integrates pH sensors, level gauges, flow meters, and other detection elements and actuators to achieve fully automatic operation. It can simultaneously remove suspended solids and color from water based on its water quality characteristics, improving treatment efficiency, with low operating and maintenance costs and good treatment results.

[0009] As a further improvement to the above technical solution, the pressure dissolved gas tank unit is equipped with a float-type level gauge and an air inlet solenoid valve.

[0010] As a further improvement to the above technical solution, the automatic dosing unit includes a drug storage tank and a drug inlet pipe connected to the drug storage tank and the pH adjustment zone respectively. The drug inlet pipe is equipped with a metering pump and an electric control valve.

[0011] As a further improvement to the above technical solution, a PLC automatic control system is also included, which is used to automatically control pH adjustment, reagent dosing, ozone dosing, liquid level control, sludge scraping and effluent adjustment.

[0012] As a further improvement to the above technical solution, the slag scraping device includes a slag scraping drive unit and a scraper, wherein the slag scraping drive unit is used to drive the scraper to move back and forth on the surface of the flocculation zone.

[0013] As a further improvement to the above technical solution, the pH adjustment zone is provided with multiple partitions, and each area separated by the multiple first partitions of the pH adjustment zone is provided with a corresponding reaction stirring structure.

[0014] As a further improvement to the above technical solution, the first partition is provided with a connecting hole, and the connecting holes of two adjacent first partitions are staggered.

[0015] As a further improvement to the above technical solution, the clear water zone is provided with a second partition, and the second partition is provided with a water outlet regulating valve.

[0016] As a further improvement to the above technical solution, the coagulation zone is provided with a water inlet pipe, the inlet end of which is connected to the upper end of the pH adjustment zone, and the outlet end of which is connected to the lower end of the coagulation zone.

[0017] As a further improvement to the above technical solution, each reaction zone of the pool is equipped with a drain valve at the bottom. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1This is a schematic diagram of an embodiment of an industrial wastewater treatment device provided by this utility model;

[0020] Figure 2 This is a schematic diagram of another aspect of an embodiment of an industrial wastewater treatment device provided by this utility model.

[0021] Figure label:

[0022] Tank body 100, pH adjustment zone 110, connecting hole 111, coagulation zone 120, water inlet pipe 121, flocculation zone 130, slag discharge zone 140, clear water zone 150, water outlet regulating valve 151, drain valve 160, reaction stirring structure 200, reaction treatment structure 300, reflux pump 310, pressure dissolved air tank 320, ozone generator 330, air compressor 340, nano microbubble releaser 350, slag scraping device 400, scraper 410. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figures 1 to 2 The present utility model Figure 1 This utility model provides an industrial wastewater treatment device, and a schematic diagram of one embodiment is shown below:

[0028] An industrial wastewater treatment device includes an integral tank 100, with a ladder installed on the side of the tank 100 for easy manual maintenance. The interior of the tank 100 is divided by vertical partitions into a pH adjustment zone 110, a coagulation zone 120, a flocculation zone 130, a sludge discharge zone 140, and a clear water zone 150, arranged sequentially. The pH adjustment zone 110 is located at the inlet end of the tank 100 and is used to receive the industrial wastewater to be treated. An inlet is provided at the upper part of the partition between the pH adjustment zone 110 and the coagulation zone 120, allowing the wastewater, after preliminary pH adjustment, to enter the coagulation zone 120. The upper inlet facilitates thorough mixing of the chemical solution before it enters the coagulation zone 120. The upper parts of the coagulation zone 120 and the flocculation zone 130 are interconnected, allowing for a smooth transition of water flow. The slag discharge zone 140 and the clear water zone 150 are separated by another partition. The partition is equipped with a water outlet. The treated clear water enters the clear water zone 150 through this outlet and is finally discharged from the clear water zone 150 located at the water outlet end of the pool body 100.

[0029] An online pH meter is installed in the pH adjustment zone 110 for real-time monitoring of wastewater pH. Multiple automatic dosing units correspond to the automatic addition of agents such as acids, alkalis, PAC (polyaluminum chloride), and PAM (polyacrylamide). The reaction stirring structure 200 is mainly located in the pH adjustment zone 110, typically employing a mechanical stirrer to ensure rapid and uniform mixing of the added acid and alkali agents with the wastewater.

[0030] The reaction processing structure 300 includes a reflux pump 310, a pressure dissolved gas tank 320, an ozone generator 330, an air compressor 340, and a nano-microbubble releaser 350. The connection and workflow are as follows: the air compressor 340 is connected to the air source inlet of the ozone generator 330 to provide compressed air; the ozone outlet of the ozone generator 330 is connected to the air inlet of the pressure dissolved air tank 320 through a pipe to inject ozone gas into the tank; the inlet pipe of the return pump 310 extends to the clean water zone 150, and its outlet pipe is connected to the water inlet of the pressure dissolved air tank 320, thereby returning a portion of the treated clean water to the pressure dissolved air tank 320; in the pressure dissolved air tank 320, ozone dissolves in the returned clean water under pressure to form high-concentration dissolved air water; this dissolved air water is transported through a pipe to the nano-microbubble releaser 350 installed at the top of the flocculation zone 130; the nano-microbubble releaser 350 releases the dissolved air water into the wastewater of the flocculation zone 130 in the form of extremely high-density nano-scale microbubbles.

[0031] The slag scraping device 400 is located above the liquid surface in the flocculation zone 130 and typically includes a scraper 410 and a slag scraping drive unit. Its function is to scrape the slag rich in pollutants formed on the surface of the flocculation zone 130 to a dedicated slag discharge zone 140, thereby achieving the separation and removal of pollutants.

[0032] Inside the pressure dissolved air tank 320 unit, a float-type level gauge is installed. This level gauge is electrically connected to an external air inlet solenoid valve and a PLC automatic control system. When the float-type level gauge detects that the liquid level in the tank is lower than the set lower limit, it sends a signal to the PLC. The PLC then controls the air inlet solenoid valve to open, and simultaneously starts (or maintains) the operation of the ozone generator 330 and the air compressor 340 to replenish the gas supply to the tank. When the liquid level reaches the set upper limit, the level gauge sends a signal, and the PLC controls the air inlet solenoid valve to close, stopping the air intake. This achieves automatic control of the liquid level in the pressure dissolved air tank 320, ensuring the stability of the dissolved air effect.

[0033] The entire system is integrated and controlled by a PLC automatic control system. This PLC system is electrically connected to all detection elements and actuators, including online pH meters, float level gauges, various reagent dosing pumps, ozone generator 330, air compressor 340, sludge scraper drive unit, and outlet water regulating valve 151. Its control logic includes: receiving pH meter signals and automatically controlling the start, stop, and frequency of acid / alkali dosing pumps after PID calculation to stabilize the pH within the required range; automatically controlling the timed and quantitative dosing of PAC and PAM dosing pumps according to preset programs or interlocked with the inlet water flow; automatically controlling the ozone dosing process based on the liquid level signal of the pressure dissolved air tank 320; automatically adjusting the opening of the outlet water regulating valve 151 based on the liquid level in the clear water zone 150; and controlling the sludge scraper 400 to operate automatically according to a set cycle, thus realizing fully automated operation.

[0034] The automatic dosing unit includes not only a storage tank but also an inlet pipe connecting the storage tank to the pH adjustment zone 110 or the coagulation and flocculation zone 130. A precision metering pump and an electric control valve are sequentially installed on this inlet pipe. The metering pump is used to accurately deliver the dosage of the chemical solution, while the electric control valve is used for pipeline on / off control. The PLC automatic control system is electrically connected to the metering pump and control valve, and can automatically and accurately control the dosage and timing of various chemicals according to a preset program or received water quality parameter signals (such as pH value). The specific structure of the scum scraping device 400 includes a scum scraping drive unit and a scraper 410 connected to it. The scum scraping drive unit typically consists of a motor, a reducer, and a transmission chain. It receives commands from the PLC and drives the scraper 410 to move reciprocally or rotary at a uniform speed along the surface of the flocculation tank, thereby stably and effectively scraping the scum to the scum discharge zone 140.

[0035] Within the pH adjustment zone 110, a vertically baffled first partition is installed. Each small area divided by these first partitions is equipped with an independent reaction stirring structure 200 (such as a small stirrer), forming a multi-stage series mixing reaction pattern, which greatly improves the mixing efficiency of the reagent and wastewater. Even more optimized, each baffled first partition has a connecting hole 111, and the connecting holes 111 on adjacent first partitions are staggered, meaning the hole in the first partition is at the bottom, and the hole in the second partition is at the top. This design forces the water flow to meander up and down within the zone, effectively extending the hydraulic residence time, avoiding short-circuiting, and ensuring sufficient reaction conditions. Alternatively, a staggered arrangement on the left and right sides can also be used.

[0036] Inside the clear water zone 150, there is also a second partition, on which a water outlet regulating valve 151 is installed. By adjusting the opening of this valve, the water flow rate and the liquid level in the clear water zone 150 can be controlled.

[0037] The coagulation zone 120 is equipped with an inlet pipe 121. The inlet end of the inlet pipe 121 is connected to the upper part of the end of the pH adjustment zone 110, while its outlet end extends to the lower side wall of the coagulation zone 120 and then opens. This "upper inlet and lower outlet" water distribution method is conducive to the formation of a uniform upward flow in the coagulation zone 120.

[0038] In addition, as a design for easy maintenance, each reaction zone (pH adjustment zone 110, coagulation zone 120, flocculation zone 130, clear water zone 150) of the tank body 100 is equipped with an emptying valve 160 at the lowest point of its bottom, which can be used to completely drain the water in the tank when the equipment needs to be repaired or shut down.

[0039] This technology addresses the pretreatment problems of industrial wastewater with high suspended solids, recalcitrant degradation, and high color. Targeting the characteristics of this type of wastewater, it simultaneously removes suspended solids and color, significantly reducing construction and operating costs. It is widely applicable to the decolorization and suspended solids pretreatment of such industrial wastewater, featuring a high degree of automation, stable operation, low operating and maintenance costs, and excellent treatment results. This wastewater treatment equipment is primarily designed for industrial wastewater with high organic matter concentration, high salinity, high color, high content of recalcitrant compounds, numerous biologically recalcitrant substances, poor biodegradability, high toxicity, and significant treatment challenges.

[0040] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An industrial wastewater treatment device, characterized in that, include: The tank body (100) includes a pH adjustment zone (110), a coagulation zone (120), a flocculation zone (130), a slag discharge zone (140), and a clear water zone (150) arranged sequentially by a partition. The pH adjustment zone (110) is located at the inlet end. The partition between the pH adjustment zone (110) and the coagulation zone (120) is provided with an inlet. The upper parts of the coagulation zone (120) and the flocculation zone (130) are connected. The partition between the slag discharge zone (140) and the clear water zone (150) is provided with an outlet. The clear water zone (150) is located at the outlet end. The flocculation zone (130) is provided with a pH meter. Multiple automatic dosing units; A reaction stirring structure (200) is located in the pH adjustment zone (110); The reaction processing structure (300) includes a reflux pump (310), a pressure dissolved gas tank (320), an ozone generator (330), an air compressor (340), and a nano-microbubble releaser (350). The air compressor (340) is connected to the ozone generator (330), and the ozone generator (330) is connected to the pressure dissolved gas tank (320) unit for injecting ozone into the pressure dissolved gas tank (320). The pressure dissolved gas tank (320) unit is connected to the nano-microbubble release unit through a pipeline for releasing ozone-containing nano-microbubbles to the ozone flotation reaction zone. The reflux pump (310) is connected to both the clear water zone (150) and the pressure dissolved gas tank (320). A slag scraping device (400) is located in the flocculation zone (130) and is used to scrape the slag to the slag discharge zone (140).

2. The industrial wastewater treatment equipment according to claim 1, characterized in that: The pressure dissolved gas tank (320) unit is equipped with a float-type level gauge and an air inlet solenoid valve.

3. The industrial wastewater treatment equipment according to claim 2, characterized in that: The automatic dosing unit includes a storage tank and a dosing pipe connected to the storage tank and the pH adjustment zone (110) respectively. The dosing pipe is equipped with a metering pump and an electric control valve.

4. The industrial wastewater treatment equipment according to claim 3, characterized in that: It also includes a PLC automatic control system for automatically controlling pH adjustment, reagent dosing, ozone dosing, liquid level control, sludge scraping, and effluent regulation.

5. The industrial wastewater treatment equipment according to claim 1, characterized in that: The slag scraping device (400) includes a slag scraping drive unit and a scraper (410). The slag scraping drive unit is used to drive the scraper (410) to move back and forth on the surface of the flocculation zone (130).

6. The industrial wastewater treatment equipment according to claim 1, characterized in that: The pH adjustment zone (110) is provided with a plurality of first partitions, and each region separated by the plurality of partitions of the pH adjustment zone (110) is provided with a corresponding reaction stirring structure (200).

7. The industrial wastewater treatment equipment according to claim 6, characterized in that: The first partition is provided with a connecting hole (111), and the connecting holes (111) of two adjacent first partitions are staggered.

8. The industrial wastewater treatment equipment according to claim 1, characterized in that: The clear water zone (150) is provided with a second partition, and the second partition is provided with a water outlet regulating valve (151).

9. An industrial wastewater treatment device according to claim 1, characterized in that: The coagulation zone (120) is provided with an inlet pipe (121), the inlet end of which is connected to the upper end of the pH adjustment zone (110), and the outlet end of which is connected to the lower end of the coagulation zone (120).

10. An industrial wastewater treatment device according to claim 1, characterized in that: Each reaction zone of the pool body (100) is equipped with an air vent valve (160) at the bottom.

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