CN215427528U

CN215427528U - Hydraulic screen suitable for treating landfill leachate stock solution

Info

Publication number: CN215427528U
Application number: CN202120998223.7U
Authority: CN
Inventors: 王刚; 冯祥军; 何武卫; 何文龙; 朱德森
Original assignee: Guangzhou Sinovast Energy Environmental Protection Group Co ltd
Current assignee: Guangzhou Sinovast Energy Environmental Protection Group Co ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-01-07
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a hydraulic screen suitable for treating landfill leachate stock solution, which comprises a box body and a screen, wherein a water inlet and a water outlet are arranged on the box body, a water distribution groove extending along the length direction of a back side plate is arranged on the upper part of the inner wall of the back side plate of the box body and is communicated with the water inlet arranged on the box body of the water distribution groove, two side edges of the screen are connected with two side plates of the box body so as to be fixed on the box body, the upper side edge of the screen is connected with a weir port of the water distribution groove, the screen is of a transverse strip-shaped grid structure, and the grid distance is 0.8-1.2 mm. The utility model not only can effectively filter the raw liquid of the landfill leachate, is not easy to block when filtering the raw liquid of the landfill leachate, but also is convenient to clean.

Description

Hydraulic screen suitable for treating landfill leachate stock solution

Technical Field

The utility model relates to a hydraulic screen, in particular to a hydraulic screen suitable for treating landfill leachate stock solution.

Background

The hydraulic screen is a small-sized separation device for filtering solid or colloidal substances such as suspended substances, floating substances, sediments and the like in sewage treatment. Can effectively reduce suspended matters (SS) in water, reduce the treatment load of subsequent procedures and directly influence the normal operation of the sewage treatment device in the whole process flow. A lot of floating garbage is carried in the raw liquid of the landfill leachate, and if the floating garbage is not effectively separated, a water pump, a three-phase separator, membrane equipment, a pipeline and the like are blocked, so that the system is frequently stopped to overhaul and cannot stably run. Therefore, the hydraulic screen is used as a pretreatment device at the most front end of the whole system and plays a very important role, and at present, problems exist in user selection, use and design and manufacture of products.

Firstly, because of the improper selection of the sieve pores, the sieve surface is accumulated with slag and blocks the sieve gap, and water can not flow down from the sieve pores normally and flows out of the sieve body from the upper part. Secondly, the water distribution is uneven, sewage is concentrated in a certain part and rushes out, so that the local load is concentrated, other filtering areas are not well used, and the utilization rate of the hydraulic screen is not well exerted. Thirdly, partial slag is accumulated on the screen surface and can not automatically flow to the screw conveyor, and the sewage is overflowed and the operation intensity is high due to frequent manual cleaning and untimely cleaning.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic screen suitable for treating landfill leachate stock solution.

In order to realize the purpose of the utility model, the utility model provides the following technical scheme: a hydraulic screen suitable for treating landfill leachate stoste comprises a box body and a screen, wherein a water inlet and a water outlet are formed in the box body, a water distribution groove extending along the length direction of a back side plate is formed in the upper portion of the inner wall of the back side plate of the box body and is communicated with the water inlet formed in the box body of the water distribution groove, two side edges of the screen are connected with two side plates of the box body so as to be fixed on the box body, the upper side edge of the screen is connected with a weir port of the water distribution groove, the screen is of a transverse strip-shaped grid structure, and the grid distance is 0.8-1.2 mm.

The screen is an arc screen.

The box body is provided with a water baffle which is positioned above the front side of the weir crest of the water distribution groove, the water baffle inclines towards the direction of the water distribution groove, and a water supply outflow space is arranged between the water baffle and the weir crest of the water distribution groove.

The included angle formed by the water baffle and the horizontal plane is an acute angle, and as one embodiment, the included angle is 45 degrees.

The bottom of the box body is provided with a squeezer on the front side, an inlet of the squeezer is communicated with one side of the screen for discharging solid impurities, and the solid impurities from the upper part and the lower part of the screen enter the squeezer to be squeezed, so that water is squeezed out.

The press is a screw press. As an embodiment, the screw press comprises a screw rod connected with a motor and a U-shaped groove which is arranged at the front side of the bottom of the box body and extends along the length direction of the box body, the screw rod is arranged in the U-shaped groove in a matching mode, one end of the U-shaped groove extends out of the box body, and a slag discharge port is arranged at the bottom of the end and used for discharging the solid matters after being pressed and dewatered.

The water outlet of the box body is arranged at the lower part of the back side plate of the box body, and the bottom of the box body is an inclined plane and is reduced from the front side of the bottom of the box body to the direction of the water outlet.

The automatic washing device is arranged on the box body and behind the screen, and is used for timely washing the screen, so that solid impurities are prevented from blocking the screen and reducing the filtering effect. As one embodiment, the automatic flushing device comprises a water spraying motor, a water storage tank and a nozzle, wherein the water storage tank is positioned in the box body and fixed on the inner wall of the back side plate of the box body, the water spraying motor is arranged on the outer wall of the back side plate, the nozzle is arranged at the top of the water storage tank and connected with a water outlet of the water storage tank through the water spraying motor and a water spraying pipe, and the nozzle faces the screen.

Compared with the prior art, the utility model has the following beneficial effects:

1. the hydraulic screen suitable for the stock solution of the landfill leachate has the advantages that the screen mesh is of a transverse strip-shaped grid structure, the grid distance is 0.8-1.2mm, the screen mesh is properly selected, the stock solution of the landfill leachate is not easy to block when being filtered, and the stock solution of the landfill leachate can be effectively filtered.

2. The water baffle is arranged above the front side of the water distribution groove, when the water inlet flow is instantly increased and cannot be uniformly distributed at the weir crest of the water distribution groove, the water baffle forcibly changes the water flow direction and flows down along the weir crest, the conditions that the water flow runs away through a box body panel and most area of a screen surface is not utilized are avoided, and the filtering efficiency is improved.

3. The automatic washing device is arranged, so that the screen can be automatically washed in time during working, filter residues are not accumulated on the screen surface, the filtering performance of the screen is ensured, and manual cleaning is not needed.

Drawings

FIG. 1 is a schematic side view of a hydraulic screen according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a rear view of a hydraulic screen of an embodiment of the present invention.

In the figure: 1-box body, 2-arc screen mesh, 3-screw conveying squeezer, 31-slag discharge port, 32-motor, 33-screw, 34-U-shaped groove, 4-water baffle, 5-water distribution groove, 6-automatic flushing device, 61-water storage groove, 62-high speed nozzle, 63-water spraying motor, 7-water inlet and 8-water outlet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that the embodiment described below is only one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, those skilled in the art can make any changes and modifications to the technical solution of the present invention without creative efforts, and the technical solution belongs to the protection scope of the present invention.

The hydraulic screen suitable for landfill leachate stoste as shown in fig. 1 and fig. 2 comprises a box body 1, an arc-shaped screen 2, an automatic flushing device 6 and a screw conveying presser 3. The upper part of the back side plate of the box body 1 is provided with a water inlet 7, the lower part is provided with a water outlet 8, the upper part of the inner wall of the back side plate is provided with a water distribution groove 5 extending along the length direction of the back side plate, and the water inlet 7 is communicated with the water distribution groove. The front side of the lower part of the box body 1 is provided with a U-shaped groove 34 for containing solid sundries, the U-shaped groove 34 extends along the length direction of the box body 1, one end of the U-shaped groove extends out of the box body 1, and the bottom of the end is provided with a slag discharge port 31 for discharging the solid matters after squeezing and dewatering. The screw 33 of the screw press 3 is arranged in the U-shaped groove 34, and the motor 32 is positioned outside the end of the U-shaped groove 34 flush with the box body 1, and is used for driving the screw 33 to rotate, so as to press solid impurities in the U-shaped groove 34, extrude landfill leachate in the solid impurities and discharge the solid matters from the slag discharge port 31. The upper end of the arc screen 2 is connected with the weir mouth of the water distribution groove 5, the lower end is connected with the mouth of the U-shaped groove 34, and the two side edges are connected with the two side plates of the box body 1. The bottom of the box body 1 is provided with an inclined surface which inclines downwards from the side below the U-shaped groove 34 to the side of the back side plate of the box body 1, so that water filtered by the arc-shaped screen surface 2 flows to the water outlet 8.

The front side above the weir crest of the water distribution groove 5 is provided with a water baffle 4 along the width direction of the box body 1. The water baffle 4 is obliquely arranged, the included angle formed by the water baffle 4 and the horizontal plane is 45 degrees, and two ends of the water baffle are respectively connected with two opposite side plates of the box body 1. When the amount of water entering the water distribution tank 5 is increased or the speed is too high, the water rushing out from the weir crest is blocked by the water baffle 4 and flows downwards along the water baffle 4 and flows out of the space between the water baffle 4 and the weir crest and falls into the arc-shaped screen 2.

The automatic flushing device 6 is fixed on the back side plate of the box body 1 and is positioned above the water outlet 8. Automatic washing unit 6 includes water spray motor 63, aqua storage tank 61 and high-speed nozzle 62, and aqua storage tank 61 is located box 1 and fixes on box 1 dorsal scale inboard wall, and water spray motor 63 sets up on the dorsal scale outboard wall, and high-speed nozzle 62 sets up at the top of aqua storage tank 61 and is connected with the delivery port of aqua storage tank 61 through water spray motor 63 and spray pipe, and high-speed nozzle 62 is towards arc screen 2.

Claims

1. The utility model provides a be suitable for water conservancy sieve of processing landfill leachate stoste, includes box and screen cloth, set up water inlet and delivery port on the box, the water distribution groove that extends along dorsal scale board length direction is established on box dorsal scale inboard wall upper portion, with the water inlet intercommunication that the water distribution groove box set up, thereby the both sides limit of screen cloth with box both sides board is connected and is fixed on the box, the last side of screen cloth with the water distribution groove weir mouth is connected, characterized by, the screen cloth is horizontal strip bars structure, and the grid distance is 0.8-1.2 mm.

2. The hydraulic screen for treating landfill leachate stoste of claim 1, wherein the screen is an arcuate screen.

3. The hydraulic screen of claim 1, wherein the tank is provided with a water baffle above the front side of the weir of the water distribution tank, the water baffle is inclined towards the water distribution tank and has a water outflow space with the weir of the water distribution tank.

4. The hydraulic screen of claim 3, wherein the angle between the water baffle and the horizontal plane is acute.

5. The hydraulic screen for treating landfill leachate stoste according to any one of claims 1 to 4, wherein the bottom of the box body is provided with a presser at the front side, and the inlet of the presser is communicated with the side of the screen from which solid impurities are discharged.

6. The hydraulic screen suitable for treating landfill leachate stoste of claim 5, wherein the press is a screw press.

7. The hydraulic screen of claim 6, wherein the hydraulic screen is adapted to process landfill leachate stoste, the hydraulic screen comprises a screw rod connected with a motor and a U-shaped groove arranged at the front side of the bottom of the box body and extending along the length direction of the box body, the screw rod is adapted to be arranged in the U-shaped groove, one end of the U-shaped groove extends and extends out of the box body, and a slag discharge port is arranged at the bottom of the end for discharging squeezed and dewatered solid matters.

8. The hydraulic screen of claim 5, further comprising an automatic flushing device disposed on the housing behind the screen for timely cleaning the screen.

9. The hydraulic screen of claim 8, wherein the automatic flushing device comprises a water spraying motor, a water storage tank and a nozzle, the water storage tank is located in the box body and fixed on the inner wall of the back side plate of the box body, the water spraying motor is arranged on the outer wall of the back side plate, the nozzle is arranged at the top of the water storage tank and connected with the water outlet of the water storage tank through the water spraying motor and a water spraying pipe, and the nozzle faces the screen.

10. The hydraulic screen of claim 1, wherein the outlet of the tank is disposed at the lower portion of the backside plate of the tank, and the bottom of the tank is a slope that decreases from the front side of the bottom of the tank toward the outlet.