Non-ferrous metallurgical wastewater flocculation and sedimentation system

Abstract

The utility model discloses a nonferrous metallurgy sewage flocculation and precipitation system, including treatment pond, be equipped with the stirring zone and the precipitation zone of separate arrangement in treatment pond, be equipped with the movable frame in the stirring zone top, be equipped with a plurality of interval arrangement's feeding hopper on the movable frame, still be equipped with the stirring frame between the movable frame corresponding adjacent feeding hopper, the side wall bottom of the precipitation zone far from the stirring zone one end is equipped with the suction pump, the precipitation zone bottom is equipped with the scraper, the utility model discloses can be realized in the whole area even feeding of flocculating agent, avoid the problem of local concentration unevenness caused by traditional fixed feeding point, in the flocculating agent delivery process, utilize the stirring frame to form dynamic stirring path with the movement, make the mixing time of flocculating agent and sewage greatly shorten, after mixing can utilize gravity difference to realize the gravity flow conveying of sewage from the stirring zone to the precipitation zone, utilize the scraper at the precipitation zone bottom to scrape the sludge to the suction pump area, realize the quick suction treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a flocculation and sedimentation system for non-ferrous metallurgical wastewater. Background Technology

[0002] In metallurgical operations, pickling is generally required, followed by rinsing with clean water. After rinsing, the clean water becomes pickling wastewater. Traditional treatment methods for pickling wastewater typically involve neutralization, coagulation, sedimentation, filter pressing, filter cake formation, and landfilling. Flocculation and sedimentation is the process of particulate matter flocculating and settling in water. After adding coagulants to water, the colloidal and dispersed particles of suspended solids form flocs under the interaction of molecular forces. During sedimentation, these flocs collide and aggregate, continuously increasing in size and mass, and increasing in settling velocity. Flocculation and sedimentation also occur in surface water after adding coagulants, organic suspended solids in domestic sewage, and activated sludge. Utility Model Content

[0003] In response to the shortcomings of existing technologies, the purpose of this utility model is to provide a flocculation and sedimentation system for non-ferrous metallurgical wastewater, which shows significant advantages in terms of mixing efficiency, sedimentation effect, automated control and ease of operation and maintenance.

[0004] The technical solution adopted by this utility model is as follows: a non-ferrous metallurgical wastewater flocculation and sedimentation system, including a treatment tank, wherein the treatment tank is provided with a stirring zone and a sedimentation zone arranged separately, and a conveying channel is provided between the stirring zone and the sedimentation zone, and the sedimentation zone is arranged lower than the stirring zone; a movable frame is provided above the stirring zone, and the two ends of the movable frame are slidably engaged with guide rail modules located on both sides of the stirring zone. The two ends of the movable frame are provided with drive modules for driving the movable frame to move along the guide rail modules. Several feeding hoppers are arranged at intervals on the movable frame, and a stirring frame is also provided between adjacent feeding hoppers. The stirring frame is drivenly connected to a motor module provided on the movable frame; a sludge suction pump is provided at the bottom of the side wall of the sedimentation zone away from the stirring zone, and a scraper is provided at the bottom of the sedimentation zone. The two ends of the scraper are drivenly connected to a transmission chain module provided on both sides of the sedimentation zone along its length.

[0005] In this technical solution, the movable frame located above the mixing zone can reciprocate along the guide rail module, driving the spaced-apart feeding hoppers to dynamically add flocculant above the mixing zone. This achieves uniform addition of flocculant across the entire area, avoiding the localized uneven concentration problem caused by traditional fixed feeding points. Simultaneously, the moving mixing frame creates a dynamic mixing path during flocculant addition, significantly shortening the mixing time between the flocculant and wastewater and dramatically improving mixing uniformity. Because the sedimentation zone is positioned below the mixing zone, gravity difference allows for gravity-driven wastewater transport from the mixing zone to the sedimentation zone after mixing. After sedimentation, scrapers at the bottom of the sedimentation zone scrape the sludge to the sludge suction pump area for rapid sludge removal, preventing the re-release of heavy metals due to prolonged sludge accumulation.

[0006] Preferably, the end of the mixing zone away from the sedimentation zone is provided with a water distribution wall, the water distribution wall is provided with horizontally spaced water inlets, the water distribution wall is provided with a guide plate arranged inclined towards the bottom of the mixing zone below the water inlets, and the side of the water distribution wall away from the water inlets is provided with an input flow channel communicating with each water inlet.

[0007] Preferably, the movable frame is equipped with nozzles arranged at intervals, and the nozzles are connected to an acid / alkali tank via pipelines, with a metering pump installed on the pipelines.

[0008] Preferably, the stirring frame includes a stirring shaft that is drivenly connected to the output end of the motor module, and stirring rods arranged vertically at intervals are mounted on the stirring shaft, with stirring blades rotatably provided at the ends of the stirring rods.

[0009] Preferably, the movable frame is equipped with a pH sensor for detecting pH values.

[0010] Preferably, the scraper has an L-shaped cross-section, and rolling grooved wheels are provided at both ends of the scraper. The rolling grooved wheels are in rolling cooperation with the limiting track provided on the side wall of the sedimentation zone.

[0011] The beneficial effects of this utility model are as follows: The movable frame in this utility model can dynamically add flocculant above the mixing zone of the spaced-apart feeding hoppers, achieving uniform addition of flocculant across the entire area and avoiding the problem of uneven concentration caused by traditional fixed feeding points; during the flocculant addition process, the moving frame forms a dynamic mixing path, significantly shortening the mixing time between the flocculant and wastewater and significantly improving the mixing uniformity; after mixing, gravity difference can be used to achieve gravity-fed transport of wastewater from the mixing zone to the sedimentation zone. After sedimentation, the sludge is scraped to the sludge suction pump area by the scraper at the bottom of the sedimentation zone, achieving rapid sludge suction treatment and avoiding the re-release of heavy metals caused by long-term sludge accumulation, thus possessing high practical value. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 The three-dimensional non-ferrous metallurgical wastewater flocculation and sedimentation system provided in this embodiment of the utility model Figure 1 .

[0014] Figure 2 The three-dimensional non-ferrous metallurgical wastewater flocculation and sedimentation system provided in this embodiment of the utility model Figure 2 .

[0015] Reference numerals: Treatment tank 100, mixing zone 110, sedimentation zone 120, conveying channel 130, moving frame 200, guide rail module 300, drive module 400, feeding hopper 500, mixing frame 600, mixing shaft 610, mixing rod 620, mixing fan blade 630, motor module 700, sludge pump 800, scraper 900, transmission chain module 1000, water distribution wall 1100, water inlet 1110, guide plate 1120, input channel 1130, nozzle 1200, limit rail 1300. Detailed Implementation

[0016] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0017] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0018] like Figure 1 and Figure 2As shown in the figure, a specific embodiment of this utility model provides a flocculation and sedimentation system for non-ferrous metallurgical wastewater, including a treatment tank 100. The treatment tank 100 has a separately arranged stirring zone 110 and a sedimentation zone 120. A conveying channel 130 is provided between the stirring zone 110 and the sedimentation zone 120, and the sedimentation zone 120 is arranged lower than the stirring zone 110. A movable frame 200 is provided above the stirring zone 110. Both ends of the movable frame 200 are slidably engaged with guide rail modules 300 located on both sides of the stirring zone 110. Both ends of the movable frame 200 are provided with drive rails that allow the movable frame 200 to move along... The guide rail module 300 is driven by a drive module 400. The moving frame 200 is provided with several spaced feeding hoppers 500. The moving frame 200 is also provided with a stirring frame 600 between adjacent feeding hoppers 500. The stirring frame 600 is driven by a motor module 700 provided on the moving frame 200. The bottom of the side wall of the sedimentation zone 120 away from the stirring zone 110 is provided with a sludge suction pump 800. The bottom of the sedimentation zone 120 is provided with a scraper 900. The two ends of the scraper 900 are driven by a transmission chain module 1000 provided on both sides of the sedimentation zone 120 along its length.

[0019] like Figure 1 and Figure 2 As shown, in this embodiment, the movable frame 200 located above the mixing zone 110 can reciprocate along the guide rail module 300, driving the spaced-apart feeding hoppers 500 to dynamically add flocculant above the mixing zone 110, achieving uniform addition of flocculant throughout the entire area and avoiding the problem of uneven local concentration caused by traditional fixed feeding points; at the same time, during the flocculant addition process, the moving mixing frame 600 forms a dynamic mixing path, which greatly shortens the mixing time between flocculant and sewage and significantly improves the mixing uniformity. Since the sedimentation zone 120 is arranged lower than the mixing zone 110, after mixing, the sewage can be gravity-fed from the mixing zone 110 to the sedimentation zone 120. The sludge settles under gravity, and after the upper clear liquid is extracted by the water pump, the sludge is scraped to the area of ​​the sludge suction pump 800 by the scraper 900. The sludge suction pump 800 is started simultaneously to transport the sludge to the sludge thickening tank for subsequent treatment.

[0020] In practical applications, the entire treatment tank 100 is constructed of reinforced concrete, and is internally divided into a mixing zone 110 and a sedimentation zone 120 by a partition wall. A conveying channel 130 (500mm wide and 300mm high) is opened at the bottom of the partition wall. The bottom surface of the sedimentation zone 120 is 400mm lower than the bottom surface of the mixing zone 110, forming a gravity-fed slope. The dimensions of the mixing zone 110 are length × width × depth = 8m × 4m × 3m, and the dimensions of the sedimentation zone 120 are length × width × depth = 10m × 4m × 3.4m.

[0021] like Figure 1 and Figure 2As shown, linear guide rail modules 300 (model THKSR20, 8m in length) are installed on the top of both side walls of the mixing zone 110, and are fixed with expansion bolts. The moving frame 200 adopts an H-shaped steel structure, with sliders at both ends slidingly engaging with the guide rail modules 300. The sliders have built-in ball bearings. The motor module 700 uses a servo motor, which drives the gear through a reducer to mesh with the rack of the guide rail module 300, realizing the reciprocating movement of the moving frame 200. Four feeding hoppers 500 are installed on the moving frame 200 at 1.5m intervals. The bottom of the feeding hoppers 500 is equipped with an electric butterfly valve to control the uniform addition of flocculant.

[0022] like Figure 1 and Figure 2 As shown, to facilitate the smooth input of wastewater into the mixing zone 110, this embodiment provides a water distribution wall 1100 at the end of the mixing zone 110 away from the sedimentation zone 120. The water distribution wall 1100 has horizontally spaced inlet holes 1110. Below the inlet holes 1110, a guide plate 1120 is provided, inclined towards the bottom of the mixing zone 110. On the side of the water distribution wall 1100 away from the inlet holes 1110, there is an input flow channel 1130 communicating with each inlet hole 1110. The water distribution wall 1100 is a brick structure with six horizontally spaced inlet holes 1110 (200mm in diameter, 1.2m apart). The guide plate 1120 is made of stainless steel, with an inclination angle of 30°, and is inclined towards the bottom of the mixing zone 110, thereby guiding the wastewater to flow evenly into the mixing zone 110. The back side of the water distribution wall 1100, connecting to the input flow channel 1130, is made of concrete with a cross-sectional area of ​​0.5m². 2 It is used to connect with the factory's sewage pipe network.

[0023] like Figure 1 and Figure 2 As shown, the pH value of metallurgical wastewater is usually acidic or alkaline. To neutralize the water, the mobile frame 200 is equipped with spaced-apart nozzles 1200. These nozzles 1200 are connected to acid / alkali solution tanks via pipelines, and metering pumps are installed on these pipelines. Multiple sets of nozzles 1200 are mounted on the mobile frame 200 and connected to acid / alkali solution tanks via PVC pipelines to store acidic and alkaline solutions respectively. Electromagnetic metering pumps are installed on these pipelines, and a pH sensor extending below the water surface is also installed on the mobile frame 200 to provide real-time data feedback to the PLC control system, thereby automatically adjusting the acid / alkali dosage.

[0024] like Figure 1 and Figure 2As shown, in order to improve the uniformity of mixing, the mixing rack 600 includes a mixing shaft 610 that is connected to the output end of the motor module 700. The mixing shaft 610 is equipped with mixing rods 620 arranged vertically at intervals. The ends of the mixing rods 620 are equipped with mixing blades 630. In practical applications, the mixing rods 620 are arranged in two layers, with three rods in each layer installed on the mixing shaft 610. The ends of the mixing blades 630 are equipped with mixing blades 630. The blades of the mixing blades 630 have an inclination angle and can rotate around the ends of the mixing rods 620, thereby increasing the mixing area and mixing force.

[0025] like Figure 1 and Figure 2 As shown, in this embodiment, the scraper 900 has an L-shaped cross-section, and rolling grooved wheels are rotatably provided at both ends of the scraper 900. The rolling grooved wheels are in rolling cooperation with the limiting track 1300 located on the side wall of the sedimentation zone 120. The cooperation between the two ends of the scraper 900 and the limiting track 1300 through the rolling grooved wheels improves the stability of the scraper 900's movement and enables the sludge to be transferred to one end of the sludge suction pump 800.

[0026] In practical applications, this system uses PLC control and integrates the following control functions:

[0027] Mobile frame control: Two preset modes, "reciprocating" and "intermittent", are available. The moving speed and dwell time can be set via the touch screen.

[0028] Feeding control: Based on the pH detection value (target pH = 7.5 ± 0.3), the metering pump is linked to adjust the acid and alkali dosage, and the opening time of the electric butterfly valve of the feeding hopper is controlled (adjustable from 1 to 5 seconds).

[0029] Sludge discharge control: The sludge level is monitored by a sludge interface meter (model E+HFMX167, accuracy ±50mm). When the sludge level reaches 1.5m, the drive chain module and sludge suction pump are automatically started, with a running time of 15 minutes / cycle.

[0030] This implementation method achieves efficient flocculation and sedimentation of non-ferrous metallurgical wastewater through modular design and intelligent control. The equipment operates stably and is easy to use, meeting the needs of large-scale industrial wastewater treatment.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A non-ferrous metallurgical wastewater flocculation and sedimentation system, characterized by; The system includes a treatment tank (100), which has a stirring zone (110) and a sedimentation zone (120) arranged separately. A conveying channel (130) is provided between the stirring zone (110) and the sedimentation zone (120), and the sedimentation zone (120) is arranged lower than the stirring zone (110). A movable frame (200) is provided above the mixing zone (110). The two ends of the movable frame (200) are slidably engaged with the guide rail modules (300) located on both sides of the mixing zone (110). The two ends of the movable frame (200) are provided with drive modules (400) for driving the movable frame (200) to move along the guide rail modules (300). The movable frame (200) is provided with a number of feeding hoppers (500) arranged at intervals. A mixing frame (600) is also provided between the movable frame (200) and adjacent feeding hoppers (500). The mixing frame (600) is connected to a motor module (700) provided on the movable frame (200). A sludge suction pump (800) is provided at the bottom of the side wall of the sedimentation zone (120) away from the stirring zone (110). A scraper (900) is provided at the bottom of the sedimentation zone (120). The two ends of the scraper (900) are connected to the transmission chain module (1000) located on both sides of the sedimentation zone (120) along its length.

2. The colored metallurgical wastewater flocculation sedimentation system according to claim 1, characterized in that, The mixing zone (110) is provided with a water distribution wall (1100) at one end away from the sedimentation zone (120). The water distribution wall (1100) is provided with horizontally spaced water inlets (1110). The water distribution wall (1100) is provided with a guide plate (1120) arranged inclined towards the bottom of the mixing zone (110) below the water inlets (1110). The side of the water distribution wall (1100) away from the water inlets (1110) is provided with an input flow channel (1130) that communicates with each water inlet (1110).

3. The colored metallurgical wastewater flocculating sedimentation system according to claim 1, characterized in that, The mobile frame (200) is equipped with nozzles (1200) arranged at intervals. The nozzles (1200) are connected to acid and alkali tanks through pipelines, and metering pumps are installed on the pipelines.

4. The colored metallurgical wastewater flocculating sedimentation system according to claim 1, characterized in that, The stirring rack (600) includes a stirring shaft (610) that is connected to the output end of the motor module (700). The stirring shaft (610) is equipped with stirring rods (620) arranged at intervals. The stirring rods (620) are rotatably provided with stirring blades (630) at their ends.

5. The colored metallurgical wastewater flocculating sedimentation system according to claim 1, characterized in that, The movable frame (200) is equipped with a pH detection sensor for detecting pH values.

6. The colored metallurgical wastewater flocculating sedimentation system according to claim 1, characterized in that, The scraper (900) has an L-shaped cross section, and the scraper (900) is provided with rolling grooved wheels at both ends. The rolling grooved wheels are in rolling cooperation with the limiting track (1300) provided on the side wall of the sedimentation zone (120).

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