Sand pool with short flow prevention and oil and residue removal functions

Abstract

The utility model provides a kind of short flow prevention cyclone grit chamber with oil and slag removal function, including inlet channel, pool body, water collecting cylinder, outlet channel, sand discharge emptying pipe and slag discharge channel etc. Speed-regulating pusher consisting of frequency conversion motor, paddle and flow velocity meter is equipped in inlet channel, and inlet flow rate can be adjusted according to water volume. The bottom of pool body is conical cylinder, and water is discharged from the bottom of central water collecting cylinder, to avoid short flow. There is also slag remover, which removes oil and slag by driving motor driving scraper and stirring blade on rotating shaft. The grit chamber solves the problem of short flow, poor oil and slag removal of traditional equipment by speed-regulating pusher and flow guide water collecting cylinder, realizes "three-phase separation", improves sand removal efficiency, and does not increase land occupation, which can be used for existing grit chamber modification and is suitable for sewage treatment pretreatment.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and in particular to a short-flow vortex grit chamber with oil and slag removal functions. Background Technology

[0002] In wastewater treatment processes, vortex grit chambers serve as pretreatment units, directly impacting the efficiency and stability of subsequent treatment processes. Traditional vortex grit chambers have revealed several problems in practical applications that urgently need to be addressed: First, they lack effective removal mechanisms for oil and scum in wastewater, making subsequent treatment equipment susceptible to oil buildup and significantly reducing water purification efficiency. Second, their flow pattern and velocity control capabilities are insufficient, making them significantly affected by fluctuations in influent flow—when the flow is low, the influent velocity is too low to generate sufficient centrifugal force for effective grit settling; when the flow is high, the residence time is shortened, resulting in insufficient centrifugal separation, and the traditional mechanical rotation enhancement method suffers from response lag. Third, the top-inlet and top-outlet design easily leads to short-circuiting, drastically reducing the actual residence time of wastewater within the chamber, resulting in low grit removal efficiency and poor operational stability. These shortcomings make traditional vortex grit chambers unable to meet the demands of modern wastewater treatment when facing fluctuations in water quality and changes in treatment load. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a short-circuit-prevention vortex grit chamber with oil and slag removal functions, which solves the technical problems of poor oil and slag removal effect, easy short-circuiting, and weak flow velocity adaptability of traditional equipment, thereby improving the pretreatment efficiency and stability of sewage treatment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A short-flow vortex grit chamber with oil and slag removal functions includes:

[0006] The vortex grit chamber has a water collection cylinder fixed at the center of the upper part of the chamber. The water collection cylinder is connected to an outlet channel to guide water from the lower part of the water collection cylinder to the outlet channel. A sand discharge and venting pipe is provided at the bottom of the chamber. A water inlet channel is connected to one side of the chamber for water intake, and a slag discharge channel for oil and slag removal is provided on the other side of the water inlet channel.

[0007] The speed-regulating propeller is installed inside the inlet channel to adjust the flow rate of the water entering the channel.

[0008] Furthermore, the speed-regulating propeller includes a variable frequency motor, blades, and a flow meter. The variable frequency motor is installed on the pool body, the blades are installed in the inlet channel and the rotation speed of the blades is controlled by the variable frequency motor, and the flow meter is installed in the inlet channel to feed back water flow retrieval information to the variable frequency motor.

[0009] Furthermore, it also includes a slag remover, which includes a drive motor, a rotating shaft, and scrapers. The drive motor is mounted on the tank body, the rotating shaft is connected to the drive motor, and the scrapers are fixed on the rotating shaft and located at the water surface to scrape the oil sludge into the slag discharge channel.

[0010] Furthermore, a stirring blade is fixedly connected to the rotating shaft, and the stirring blade is located below the scraper to stir the water.

[0011] Furthermore, two slag removers are provided, located on opposite sides of the slag discharge channel.

[0012] Furthermore, the slag discharge channel is made of stainless steel and is a rectangular channel.

[0013] Furthermore, the pool body is cylindrical.

[0014] Furthermore, the water collection cylinder is cylindrical.

[0015] Furthermore, the bottom inner wall of the pool is configured as a conical cylinder.

[0016] Furthermore, a sand collecting cylinder is provided at the bottom of the pool, and a conical annular platform is provided at the bottom of the sand collecting cylinder, with the sand discharge and venting pipe connected to the bottom of the sand collecting cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By monitoring and adjusting the influent flow rate in real time through the speed-regulating flow generator, it can effectively adapt to changes in influent flow rate, ensure that the sewage forms a stable vortex in the tank, avoid short-circuiting, and greatly improve the treatment efficiency and stability of the grit chamber.

[0019] 2. The slag remover can efficiently remove impurities such as oil sludge from the water surface. The synergistic effect of the scraper and the agitator blades makes the slag removal effect more significant.

[0020] 3. The rational design of components such as the tank body, water collection cylinder, sand discharge and venting pipe, and slag discharge channel, as well as the coordinated cooperation between various equipment, ensures that the entire sedimentation tank operates stably and reliably.

[0021] 4. The speed-regulating impeller adjusts its rotation speed according to the actual influent flow rate, avoiding unnecessary energy consumption and saving energy and protecting the environment. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a top view of an embodiment of the present invention.

[0024] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model.

[0025] In the above attached diagram: 1. Pool body; 11. Conical cylinder; 2. Water collection cylinder; 3. Water outlet channel; 4. Sand discharge and venting pipe; 5. Water inlet channel; 6. Slag discharge channel; 7. Speed-regulating propeller; 71. Variable frequency motor; 72. Blade; 8. Slag remover; 81. Rotating shaft; 82. Scraper; 83. Stirring blade; 9. Sand collection cylinder; 10. Conical ring platform. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-2 As shown in the figure, this utility model embodiment proposes a short-flow vortex grit chamber with oil and slag removal functions, including a chamber body 1. A flow-guiding water collection cylinder 2 is fixed at the upper center of the chamber body 1, and the water collection cylinder 2 is connected to an outlet channel 3 for guiding water from the lower part of the water collection cylinder 2 into the outlet channel 3. A sand discharge and venting pipe 4 is provided at the bottom of the chamber body 1 for discharging sand and other impurities settled at the bottom of the chamber. An inlet channel 5 for water intake is connected to one side of the chamber body 1, and a slag discharge channel 6 for oil and slag removal is provided on the other side opposite to the inlet channel 5. This structural arrangement allows wastewater to form an effective vortex within the chamber body 1, achieving the separation and removal of impurities such as sand and oil slag. The chamber body 1 is preferably cylindrical, as this shape facilitates the formation of a stable vortex within the chamber, improving the separation effect. The water collection cylinder 2 is also cylindrical to better achieve the flow-guiding function. The bottom inner wall of the pool body 1 is designed as a conical cylinder 11, which facilitates the accumulation of sand and other impurities at the bottom and improves the sand discharge efficiency. A sand collection cylinder 9 is also provided at the bottom of the pool body 1. The bottom of the sand collection cylinder 9 is provided with a conical ring platform 10. The sand discharge and venting pipe 4 is connected to the bottom of the sand collection cylinder 9, which further optimizes the sand discharge structure and ensures that sand particles can be discharged smoothly.

[0028] A speed-regulating propeller 7 is installed within the inlet channel 5 to adjust the flow rate of the incoming water. The speed-regulating propeller 7 includes a variable frequency motor 71, a blade 72, and a flow meter. The variable frequency motor 71 is mounted on the tank body 1, the blade 72 is installed within the inlet channel 5 and its rotation speed is controlled by the variable frequency motor 71, and the flow meter, also installed within the inlet channel 5, feeds back the water flow information to the variable frequency motor 71. Through this setup, the flow meter monitors the water flow velocity in the inlet channel 5 in real time and feeds the information back to the variable frequency motor 71. The variable frequency motor 71 adjusts the rotation speed of the blade 72 based on the feedback information, thereby precisely controlling the inlet water flow rate. When the inlet water flow rate changes, the speed-regulating propeller 7 automatically adjusts to maintain the water flow velocity entering the tank body 1 within a suitable range, effectively preventing short-circuiting and ensuring that the wastewater can undergo sufficient vortex separation within the tank body 1. For example, when the influent flow rate increases, the flow meter detects the increased flow velocity and transmits a signal to the variable frequency motor 71. The variable frequency motor 71 then reduces the speed of the blade 72, slowing down the influent flow rate. Conversely, when the influent flow rate decreases, the variable frequency motor 71 increases the speed of the blade 72, accelerating the influent flow rate. Regarding equipment selection, the variable frequency motor 71 can be a common ABB brand ACS580 series variable frequency motor, which has good speed regulation performance and stability. The blade 72 can be made of stainless steel, which has strong corrosion resistance and wear resistance; for example, a three-bladed propeller blade 72 made of 304 stainless steel can be used. The flow meter can be an E+H brand FMU30 ultrasonic flow meter, which has high measurement accuracy and strong reliability.

[0029] Additionally, a sludge remover 8 is included, comprising a drive motor, a rotating shaft 81, and scrapers 82. The drive motor is mounted on the tank body 1, and the rotating shaft 81 is connected to the drive motor. The scrapers 82 are fixed to the rotating shaft 81 and located at the water surface, used to scrape oil sludge into the sludge discharge channel 6. An agitator 83 is also fixedly connected to the rotating shaft 81, located below the scrapers 82, used to agitate the water and squeeze floating oil and sludge from the water surface into the sludge discharge channel 6. The drive motor drives the rotating shaft 81 to rotate, enabling the scrapers 82 to scrape oil sludge from the water surface into the sludge discharge channel 6, thus achieving the function of oil and sludge removal. Simultaneously, the agitator 83 agitates the water, making it easier for oil sludge and other impurities in the wastewater to float to the surface, improving sludge removal efficiency. For example, in some oily wastewater, some oil droplets may combine with fine particulate impurities to form a suspended state. The agitation action of the agitator 83 can disrupt this suspended structure, making it easier for oil droplets and impurities to separate and float to the surface. To further improve the slag removal effect, two slag removers 8 are provided, located on both sides of the slag discharge channel 6. The drive motor can be a SEW brand DRN series motor, which has high torque and stable operating performance; the rotating shaft 81 is made of 45# steel and has undergone heat treatment to ensure sufficient strength and toughness; the scraper 82 and stirring blade 83 can be made of polypropylene, which is lightweight and corrosion-resistant. The slag discharge channel 6 is made of stainless steel in a rectangular shape. Stainless steel has good corrosion resistance, effectively preventing the slag discharge channel 6 from being corroded by sewage, extending its service life. The rectangular shape of the channel facilitates the collection and discharge of impurities such as oil sludge.

[0030] The working principle is:

[0031] Wastewater enters the vortex grit chamber through the inlet channel 5. The speed-regulating propeller 7 adjusts the inlet speed in real time according to the inlet flow rate, ensuring that the wastewater enters the chamber 1 tangentially at a suitable flow velocity, forming a vortex within the chamber 1. Under the action of the vortex, heavier impurities such as sand particles settle to the bottom of the chamber 1 under the combined action of centrifugal force and gravity, and are eventually discharged through the grit discharge pipe 4. Lighter impurities such as oil sludge on the water surface are removed by the sludge remover 8. The drive motor of the sludge remover 8 drives the rotating shaft 81 to rotate, and the scraper 82 scrapes the oil sludge on the water surface into the sludge discharge channel 6. At the same time, the stirring blades 83 agitate the water, causing impurities such as oil sludge in the wastewater to float to the surface, making it easier for the scraper 82 to clean them. The water collection cylinder 2 collects the treated water from the center of the upper part of the chamber 1 and discharges it through the outlet channel 3. Throughout the process, all components work together to achieve efficient oil and sludge removal and short-flow prevention of wastewater treatment.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A short-flow vortex grit chamber with oil and slag removal functions, characterized in that, include: The vortex grit chamber has a water collection cylinder fixed at the center of the upper part of the chamber. The water collection cylinder is connected to an outlet channel to guide water from the lower part of the water collection cylinder to the outlet channel. A sand discharge and venting pipe is provided at the bottom of the chamber. A water inlet channel is connected to one side of the chamber for water intake, and a slag discharge channel for oil and slag removal is provided on the other side of the water inlet channel. The speed-regulating propeller is installed inside the inlet channel to adjust the flow rate of the water entering the channel.

2. The anti-short-flow vortex grit chamber with oil and slag removal function as described in claim 1, characterized in that, The speed-regulating propeller includes a variable frequency motor, blades, and a flow meter. The variable frequency motor is installed on the pool body, the blades are installed in the inlet channel and the rotation speed of the blades is controlled by the variable frequency motor, and the flow meter is installed in the inlet channel to feed back water flow retrieval information to the variable frequency motor.

3. The anti-short-flow vortex grit chamber with oil and slag removal function as described in claim 1, characterized in that, It also includes a slag remover, which includes a drive motor, a rotating shaft and a scraper. The drive motor is mounted on the tank body, the rotating shaft is connected to the drive motor, and the scraper is fixed on the rotating shaft and located at the water surface to scrape the oil sludge into the slag discharge channel.

4. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 3, characterized in that, A stirring blade is also fixedly connected to the rotating shaft. The stirring blade is located below the scraper and is used to stir the water.

5. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 4, characterized in that, Two slag removers are provided, located on both sides of the slag discharge channel.

6. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 1, characterized in that, The slag discharge channel is made of stainless steel and is rectangular in shape.

7. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 1, characterized in that, The pool body is cylindrical.

8. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 1, characterized in that, The water collection cylinder is cylindrical.

9. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 1, characterized in that, The bottom inner wall of the pool is designed as a conical cylinder.

10. A short-flow vortex grit chamber with oil and slag removal functions as described in claim 9, characterized in that, A sand collecting cylinder is provided at the bottom of the pool, and a conical ring is provided at the bottom of the sand collecting cylinder. The sand discharge pipe is connected to the bottom of the sand collecting cylinder.

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