CN217549145U

CN217549145U - Thick grid ditch of sewage treatment

Info

Publication number: CN217549145U
Application number: CN202221555395.8U
Authority: CN
Inventors: 杜军; 白献宇; 付振
Original assignee: Beikong Technical Service Guangdong Co ltd
Current assignee: Beikong Technical Service Guangdong Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-10-11
Anticipated expiration: 2032-06-21

Abstract

The utility model relates to a thick grid ditch of sewage treatment, including the inlet shaft, the grid ditch, the outlet shaft of two parallels that communicate in proper order, every the mid-mounting of grid ditch has thick grid, the inlet shaft is equipped with the inlet tube with the outlet shaft looks remote site, install the first water conservancy diversion wall and the seven-sided shape water conservancy diversion platform of two-sided symmetry in the inlet shaft, form two guiding gutters that become "people" font and arrange between first water conservancy diversion wall and the water conservancy diversion platform, one side of outlet shaft is equipped with the outlet, the offside that lies in the outlet shaft is equipped with a second water conservancy diversion wall, the both sides that lie in the outlet shaft are equipped with a third water conservancy diversion wall respectively. The beneficial effects are that: the loss of kinetic energy of sewage entering a sewage treatment plant is reduced, the energy of gravity incoming water is fully utilized, the necessary flow velocity of the channel is maintained, and the sediment deposition of the channel caused by the over-slow flow velocity is avoided.

Description

Thick grid ditch of sewage treatment

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a sewage treatment coarse grid ditch.

Background

After sewage enters a sewage treatment plant through a main pipe after being collected by a pipe network, because the number of the thick grid channels is usually more than 2, a water inlet well is arranged in front of the two thick grid channels to receive and distribute the sewage, and the incoming water with flow velocity and kinetic energy generates head loss in the water inlet well and consumes most of the kinetic energy. The outdoor drainage design standard GB50014-2021 requires the flow velocity of the passing grid to be 0.6-1.0 m/s, the deposition of sand grains and suspended matters can be generated in a channel when the flow velocity is too low, and a large passing grid head loss can be generated when the flow velocity is too high, and meanwhile, part of the suspended matters can pass through the passing grid.

The thick grid channel is usually designed according to the flow rate in high days and high hours and checked according to the flow rate in rainy seasons, the flow rate of the grid passing is generally not too high in the actual operation process, and the insufficient flow rate of the grid passing is often caused by various factors such as the actual water quantity being smaller than the designed flow rate, the energy dissipation of a water inlet well, the energy dissipation of a water outlet well of a thick grid channel and the like.

The too low flow velocity of the over-grid can cause the channel to deposit sand and sludge, and simultaneously can cause the water blocking in front of the grid, further causes the deposition of sand and suspended matters in the sewage pipe network; the reason that the flow velocity of the grid-crossing is lower is that kinetic energy of incoming water is consumed by sudden expansion and sudden contraction of the water inlet well and even by direct impact of water flow on a partition wall, and in some projects, in order to save land occupation or facilitate open caisson construction, the water outlet of the grid ditch needs to be folded by 90 degrees and enters a water collecting well, so that the flow energy of the water is further consumed. The design that the water outlet of the coarse grid channel enters the subsequent water collecting well is a water drop design, but in normal operation, the normal water level of the water collecting well is in flush joint with the water outlet surface of the coarse grid channel, the water is not dropped to enter the water collecting well in actual operation, and if the flow rate of the coarse grid channel is too slow, silt can be deposited in the water collecting well.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above problems existing in the prior art and provide a sewage treatment coarse grid canal.

For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

the utility model provides a thick grid canal of sewage treatment, includes the inlet shaft that communicates in proper order, the grid canal, the outlet shaft of two parallels, every the mid-mounting of grid canal has thick grid, the inlet shaft is equipped with the inlet tube with the outlet shaft looks remote site, install the first water conservancy diversion wall and the seven-sided water conservancy diversion platform of bilateral symmetry in the inlet shaft, form two guiding gutters that become "people" font and arrange between first water conservancy diversion wall and the water conservancy diversion platform, one side of outlet shaft is equipped with the outlet, the offside that lies in the outlet shaft is equipped with a second water conservancy diversion wall, the both sides that lie in the outlet shaft are equipped with a third water conservancy diversion wall respectively.

The water inlet gate is installed at the junction of the grating channel and the water inlet well, and the water outlet gate is installed at the junction of the grating channel and the water outlet well.

The utility model has the advantages that: the loss of kinetic energy of sewage entering a sewage treatment plant is reduced, the energy of gravity incoming water is fully utilized, the necessary flow velocity of the channel is maintained, and the sediment deposition of the channel caused by the over-slow flow velocity is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic structural view of a sewage treatment coarse grid ditch in the present invention from above;

FIG. 2 is a schematic sectional view of a coarse grid channel for sewage treatment according to the present invention;

the reference numbers in the figures illustrate: the water inlet well 1, the grating canal 2, the water outlet well 3, the water inlet gate 4, the water outlet gate 5, the coarse grating 6, the water inlet pipe 7, the first guide wall 8, the guide platform 9, the guide groove 10, the water outlet 11, the second guide wall 12, the third guide wall 13, the first guide surface 14, the second guide surface 15, the third guide surface 16 and the connecting surface 17.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 and 2, a sewage treatment coarse grid channel comprises a water inlet well 1, two parallel grid channels 2 and a water outlet well 3 which are sequentially communicated, wherein a water inlet gate 4 is installed at the junction of the grid channels 2 and the water inlet well 1, a water outlet gate 5 is installed at the junction of the grid channels 2 and the water outlet well 3, a coarse grid 6 is installed in the middle of each grid channel 2, a water inlet pipe 7 is arranged at the opposite end of the water inlet well 1 and the water outlet well 3, a first guide wall 8 and a heptagon guide table 9 which are symmetrical in two sides are installed in the water inlet well 1, two guide grooves 10 which are arranged in a herringbone manner are formed between the first guide wall 8 and the guide table 9, and the loss of kinetic energy of incoming water in the water inlet pipe 7 is reduced; a water outlet 11 is arranged on one side of the water outlet well 3, a second guide wall 12 is arranged on the opposite side of the water outlet 11 in the water outlet well 3, and a third guide wall 13 is respectively arranged on two sides of the water outlet 11 in the water outlet well 3.

The guide table 9 comprises two first guide surfaces 14 facing the water inlet pipe 7, two second guide surfaces 15 parallel to each other, two third guide surfaces 16 facing the water outlet well and a connecting surface 17 one surface of which is connected with the middle partition walls of the two grid channels, the second guide surfaces 15 are parallel to the central axis of the grid channels 2, the included angle between the first guide surfaces 14 and the second guide surfaces 15 is 150 degrees, the loss of kinetic energy caused by the fact that incoming water directly impacts the plane partition walls is avoided, the first guide surfaces 14 are parallel to the first guide walls 8, and the included angle between the third guide surfaces 16 and the second guide surfaces 15 is 150 degrees; the first guide wall 8 is matched with the first guide surface 14, the second guide surface 15 and the third guide surface 16 to form a guide groove 10 with gradually increasing width, and after the water inlet pipe is connected into the water inlet well, the water inlet pipe is guided to the two grating channels 2 through gradually expanding guide, so that the loss of the kinetic energy of the incoming water in the water inlet pipe is reduced.

The acute angle that presss from both sides between the center pin of second guide wall 12 and grid canal 2 is 30, and the acute angle that presss from both sides between the center pin of third guide wall 12 and grid canal 2 is 30, not only directly carries out the water conservancy diversion from grid canal 2 entering outlet well 3, still avoids outlet well 3 to appear dead angle deposit silt particle.

The top end of the diversion table 9 is at least 200mm higher than the highest water level of the water inlet well 1, the highest water level of the water inlet well 1 is equal to or higher than the highest water level of the grating channel 2, and the highest water level of the grating channel 2 is equal to or higher than the highest water level of the water outlet well 3, so that the diversion function of the diversion table can be realized.

The bottom surface of the water inlet well 1 is flush with the bottom surface of the grid channel 2 adjacent to the water inlet well, and the bottom surface of the water outlet well 3 is lower than the bottom surface of the grid channel 2 adjacent to the water outlet well. The bottom surface of the grid channel 2 between the coarse grid 6 and the water inlet well 1 is higher than the bottom surface of the grid channel 2 between the coarse grid 6 and the water outlet well 3. Make sewage form the drop structure behind the thick grid 6, increase the hydrodynamic energy, avoid appearing the desilting in the grid ditch 2, reduce the head loss of sewage when passing through grid ditch 6.

A water collecting well is arranged at one side of the water outlet well 3, and water discharged from the water outlet directly flows into the water collecting well. After the highest liquid level of the water collecting well is improved by reducing the head loss, the normal operating liquid level of the water collecting well is improved at the same time. The static lift part in the lift calculation of the lift pump is from the normal liquid level of the water collecting well to the subsequent monomer liquid level, and the energy consumption of the lift pump in a sewage treatment plant is larger and is only second to the blower of the biochemical tank. The energy-saving effect of a large-scale sewage treatment plant is obvious, and the power consumption of a lift pump of the sewage treatment plant is reduced.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a thick grid ditch of sewage treatment which characterized in that: including the inlet shaft that communicates in proper order, the grid canal of two parallels, the outlet shaft, every the mid-mounting of grid canal has thick grid, the inlet shaft is equipped with the inlet tube with the outlet shaft looks remote site, install the first water conservancy diversion wall of bilateral symmetry and heptagon water conservancy diversion platform in the inlet shaft, form two guiding gutters that become "people" font and arrange between first water conservancy diversion wall and the water conservancy diversion platform, one side of outlet shaft is equipped with the outlet, the offside that lies in the outlet shaft is equipped with a second water conservancy diversion wall, the both sides that lie in the outlet shaft are equipped with a third water conservancy diversion wall respectively.

2. The sewage treatment coarse grid ditch of claim 1, wherein: the junction of the grating channel and the water inlet well is provided with a water inlet gate, and the junction of the grating channel and the water outlet well is provided with a water outlet gate.

3. The sewage treatment coarse grid ditch of claim 1, wherein: the water conservancy diversion platform is including two first water conservancy diversion faces towards the inlet tube, two second water conservancy diversion faces that are parallel to each other, two third water conservancy diversion faces towards the outlet well and the connection face that one side and two grid ditch intermediate wall are connected, the second water conservancy diversion face parallels with the center pin of grid ditch, the contained angle between first water conservancy diversion face and the second water conservancy diversion face is 150, first water conservancy diversion face parallels with first water conservancy diversion wall, the contained angle between third water conservancy diversion face and the second water conservancy diversion face is 150.

4. The sewage treatment coarse grid ditch of claim 1, wherein: the acute angle between the second guide wall and the central axis of the grid channel is 30 degrees, and the acute angle between the third guide wall and the central axis of the grid channel is 30 degrees.

5. The sewage treatment coarse grid ditch of claim 1, wherein: the bottom surface of the water inlet well is flush with the bottom surfaces of the grid channels adjacent to the water inlet well, and the bottom surface of the water outlet well is lower than the bottom surfaces of the grid channels adjacent to the water outlet well.

6. The sewage treatment coarse grid ditch of claim 1, wherein: the bottom surface of the grating channel between the coarse grating and the water inlet well is higher than the bottom surface of the grating channel between the coarse grating and the water outlet well.

7. The sewage treatment coarse grid ditch of claim 1, wherein: the top end of the diversion table is at least 200mm higher than the highest water level of the water inlet well, the highest water level of the water inlet well is equal to or higher than the highest water level of the grating channel, and the highest water level of the grating channel is equal to or higher than the highest water level of the water outlet well.