Efficient defoaming device for coal coking wastewater treatment

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a high-efficiency defoaming device for coal coking wastewater treatment, and aims to solve the technical problem of poor defoaming effect caused by difficulty in uniformly covering a sedimentation tank with a larger area during feeding. The threaded shaft is in threaded connection with a scraping plate, the scraping plate is slidably connected to the sliding rail, the upper portions of the two sliding ends of the scraping plate are each provided with a corresponding defoaming mechanism, the defoaming mechanisms are connected to the side wall of the sedimentation tank, the defoaming mechanisms can add a defoaming agent to the lower portion, and foam is scraped to the two sides of the sedimentation tank through the scraping plate moving back and forth in the sedimentation tank; the defoaming mechanisms located on the upper portions of the two sides of the sedimentation tank add defoaming agents downwards to eliminate foams, so that all the foams can be covered without even adding, compared with full-tank adding, the agent consumption can be reduced, and the scraper advances on the liquid level of the upper portion of the sedimentation tank, and precipitation on the lower portion cannot be affected.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a high-efficiency defoaming device for treating coal coking wastewater. Background Technology

[0002] Coal coking processes generate large quantities of complex wastewater, primarily containing pollutants such as phenols, cyanides, ammonia nitrogen, polycyclic aromatic hydrocarbons (PAHs), oils, and suspended solids. This wastewater is characterized by high toxicity, high color, and poor biodegradability. Direct discharge of this type of wastewater without effective treatment will cause serious harm to water bodies, soil, and the ecological environment. Therefore, it is essential to employ stringent treatment processes to ensure it meets discharge standards or is reused.

[0003] During wastewater treatment, a large amount of foam is easily generated due to the surface activity of organic matter, aeration reactions, acid-base adjustment, or chemical reactions. This foam can easily clog pipes, interfere with instrument monitoring, and affect the normal operation of treatment equipment. It may also lead to decreased treatment efficiency, increased energy consumption, increased risk of pollutant diffusion, and even affect the stability of subsequent processes.

[0004] Existing technologies defoam by adding defoaming agents, but it is difficult to evenly cover a large sedimentation tank when adding the agents, resulting in poor defoaming effect. Utility Model Content

[0005] In order to solve the technical problem that it is difficult to evenly cover a large sedimentation tank during dosing, resulting in poor defoaming effect, this utility model provides a high-efficiency defoaming device for coal coking wastewater treatment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency defoaming device for treating coal coking wastewater, comprising: a sedimentation tank, bearing seats and slide rail supports connected to the upper ends of opposite sides of the sedimentation tank, a slide rail connected inside the slide rail support, a threaded shaft rotatably connected inside the bearing seat, a scraper threadedly connected to the threaded shaft, the scraper slidably connected to the slide rail, and corresponding defoaming mechanisms provided at the upper parts of the two sliding ends of the scraper, the defoaming mechanisms being connected to the side wall of the sedimentation tank, and the defoaming mechanisms being able to add defoaming agent downwards.

[0007] Preferably, the scraper includes a hollow float plate, with a sliding plate slidably connected inside the hollow float plate. The sliding plate is threadedly connected to a threaded shaft and slidably connected to a slide rail. The lower end of the sliding plate is connected to the inner wall of the hollow float plate by a pull rope. When the hollow float plate reaches the end, a defoaming gap is left between the sliding plate and the inner wall of the sedimentation tank. The defoaming mechanism is located above the defoaming gap.

[0008] Preferably, the defoaming mechanism includes a defoaming cylinder located above the defoaming gap. The defoaming cylinder is connected to the sedimentation tank via a defoaming bracket. A hopper is connected to the upper part of the defoaming cylinder. A rotating shaft is rotatably connected to the side wall of the defoaming cylinder. Fan blades are evenly distributed around the circumference of the rotating shaft inside the defoaming cylinder. The outer edge of the fan blades contacts the inner circumference of the defoaming cylinder. A spraying hole is provided at the lower part of the defoaming cylinder. The rotating shaft is connected to the output shaft of a servo motor.

[0009] Preferably, a contact switch is connected to the inner surface of the bearing housing. When the contact switch contacts the slide plate, it sends a signal to the controller, and the controller controls the servo motor to rotate a specified angle according to the signal.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] Foam is scraped to both sides of the sedimentation tank by a scraper that moves back and forth within the tank. The defoaming mechanism located at the upper part of both sides of the sedimentation tank adds defoaming agent downwards to eliminate the foam. This method can cover all air bubbles without uniform addition, which can reduce the amount of agent consumed compared to adding it to the entire tank. Furthermore, the scraper moves on the upper liquid surface of the sedimentation tank and will not affect the sedimentation at the bottom.

[0012] The scraper consists of a sliding plate and a hollow float plate. The hollow float plate can float on the water surface and adjust its height according to the liquid level, which is very convenient and further reduces the impact on the sediment at the bottom. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.

[0015] In the diagram: 1. Sedimentation tank; 2. Bearing seat; 3. Slide rail bracket; 4. Slide rail; 5. Threaded shaft; 6. Scraper; 61. Hollow float plate; 62. Slide plate; 63. Pull rope; 7. Defoaming mechanism; 71. Defoaming cylinder; 72. Defoaming bracket; 73. Hopper; 74. Rotating shaft; 75. Fan blade; 8. Contact switch. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] The rotary connection described in this device refers to the axial fixation of the bearing by mounting the bearing on the shaft, with a spring retaining ring groove provided on the shaft or shaft hole, and the rotation achieved by locking the elastic retaining ring in the retaining ring groove; the hinge connection refers to the connection method that allows movement through connecting parts such as hinges, pins, and short shafts.

[0018] The present invention will now be described in detail with reference to the accompanying drawings.

[0019] The following is in conjunction with the appendix Figure 1-2 This embodiment describes a high-efficiency defoaming device for treating coal coking wastewater, comprising: a sedimentation tank 1, bearing seats 2 and slide rail supports 3 connected to the upper ends of opposite sides of the sedimentation tank 1, a slide rail 4 connected inside the slide rail support 3, a threaded shaft 5 rotatably connected inside the bearing seats 2, a scraper 6 threadedly connected to the threaded shaft 5, the scraper 6 slidably connected to the slide rail 4, and a corresponding defoaming mechanism 7 provided at the upper part of each of the two sliding ends of the scraper 6, the defoaming mechanism 7 being connected to the side wall of the sedimentation tank 1, and the defoaming mechanism 7 being able to add defoaming agent downwards.

[0020] In use, the power drives the threaded shaft 5 to rotate. The threaded shaft 5, which is axially limited, drives the scraper 6 to slide along the slide rail 4 above the liquid surface, causing the foam to move and scrape the foam to both sides of the sedimentation tank 1. The defoaming mechanism 7 located at the upper part of both sides of the sedimentation tank 1 adds defoaming agent downwards to eliminate the foam. In this way, all air bubbles can be covered without uniform addition. Compared with adding to the whole tank, the amount of agent consumed can also be reduced. Moreover, the scraper moves on the upper liquid surface of the sedimentation tank and will not affect the lower sedimentation. The defoaming mechanism 7 can be selected to use liquid spray to use liquid defoaming agent for defoaming, or it can be selected to use fixed throwing to use silica particles for defoaming.

[0021] The scraper 6 includes a hollow float plate 61, and a sliding plate 62 is slidably connected inside the hollow float plate 61. The sliding plate 62 is threadedly connected to the threaded shaft 5 and slidably connected to the slide rail 4. The lower end of the sliding plate 62 is connected to the inner wall of the hollow float plate 61 through a pull rope 63. When the hollow float plate 61 runs to the end, a defoaming gap is left between the sliding plate 62 and the inner wall of the sedimentation tank 1. The defoaming mechanism 7 is located above the defoaming gap.

[0022] The hollow float plate 61 can float on the water surface and adjust its height by sliding vertically along the slide plate 62 according to the liquid level, which is very convenient and further reduces the impact on the sediment at the bottom. The threaded shaft 5 drives the hollow float plate 61 to move through the slide plate 62, and transports the foam to the defoaming gap for defoaming.

[0023] The defoaming mechanism 7 includes a defoaming cylinder 71, which is located above the defoaming gap. The defoaming cylinder 71 is connected to the sedimentation tank 1 via a defoaming bracket 72. A hopper 73 is connected to the upper part of the defoaming cylinder 71. A rotating shaft 74 is rotatably connected to the side wall of the defoaming cylinder 71. Fan blades 75 are evenly distributed around the circumference of the rotating shaft 74 inside the defoaming cylinder 71. The outer edge of the fan blades 75 contacts the inner circumference of the defoaming cylinder 71. A spraying hole 76 is opened at the lower part of the defoaming cylinder 71. The rotating shaft 74 is connected to the output shaft of a servo motor.

[0024] When using silica solid defoamer, silica particles are placed in hopper 73 and enter between fan blades 75. The granules are controlled by a servo motor to rotate shaft 74 at a specified angle, so that fan blades 75 transport the particles to the spraying hole 76 for spraying, thereby achieving intermittent discharge of particles and eliminating air bubbles in the lower defoaming gap.

[0025] A contact switch 8 is connected to the inner surface of the bearing housing 2. When the contact switch 8 contacts the slide plate 62, it sends a signal to the controller. The controller controls the servo motor to rotate a specified angle according to the signal.

[0026] When the contact switch 8 contacts the slide plate 62, a defoaming gap is formed. The controller controls the discharge of the medicine through the servo motor to perform defoaming and realize automated defoaming.

[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency defoaming device for treating coal coking wastewater, characterized in that: include: Sedimentation tank (1), bearing seats (2) and slide rail brackets (3) are connected to the upper ends of the two sides of the sedimentation tank (1). A slide rail (4) is connected inside the slide rail bracket (3). A threaded shaft (5) is rotatably connected inside the bearing seat (2). A scraper (6) is threadedly connected to the threaded shaft (5). The scraper (6) is slidably connected to the slide rail (4). A corresponding defoaming mechanism (7) is provided at the upper part of the two sliding ends of the scraper (6). The defoaming mechanism (7) is connected to the side wall of the sedimentation tank (1). The defoaming mechanism (7) can add defoaming agent to the lower part.

2. The high-efficiency defoaming device for treating coal coking wastewater according to claim 1, characterized in that: The scraper (6) includes a hollow float plate (61), and a sliding plate (62) is slidably connected inside the hollow float plate (61). The sliding plate (62) is threadedly connected to the threaded shaft (5) and slidably connected to the slide rail (4). The lower end of the sliding plate (62) is connected to the inner wall of the hollow float plate (61) through a pull rope (63). When the hollow float plate (61) runs to the end, there is a defoaming gap between the sliding plate (62) and the inner wall of the sedimentation tank (1). The defoaming mechanism (7) is located above the defoaming gap.

3. The high-efficiency defoaming device for treating coal coking wastewater according to claim 2, characterized in that: The defoaming mechanism (7) includes a defoaming cylinder (71), which is located above the defoaming gap. The defoaming cylinder (71) is connected to the sedimentation tank (1) through a defoaming bracket (72). A hopper (73) is connected to the upper part of the defoaming cylinder (71). A rotating shaft (74) is rotatably connected to the side wall of the defoaming cylinder (71). Fan blades (75) are evenly distributed around the circumference of the rotating shaft (74) inside the defoaming cylinder (71). The outer edge of the fan blades (75) is in contact with the inner circumference of the defoaming cylinder (71). A spraying hole (76) is opened at the lower part of the defoaming cylinder (71). The rotating shaft (74) is connected to the output shaft of the servo motor.

4. The high-efficiency defoaming device for treating coal coking wastewater according to claim 3, characterized in that: The inner surface of the bearing housing (2) is connected to a contact switch (8). When the contact switch (8) contacts the slide plate (62), it sends a signal to the controller. The controller controls the servo motor to rotate a specified angle according to the signal.

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