CN215939101U

CN215939101U - Sludge discharge system of vertical flow type sedimentation tank, sedimentation tank and sewage treatment system

Info

Publication number: CN215939101U
Application number: CN202120379947.3U
Authority: CN
Inventors: 邓力; 曲言
Original assignee: Beijing Tonghai Liyan Technology Service Co ltd
Current assignee: Beijing Tonghai Liyan Technology Service Co ltd
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2022-03-04
Anticipated expiration: 2031-02-19

Abstract

The utility model discloses a sludge discharge system of a vertical flow sedimentation tank, the sedimentation tank and a sewage treatment system, wherein the sludge discharge system (1) is arranged at the bottom of the sedimentation tank and used for discharging sediments; it includes: the mud bucket (11) is arranged at the bottom of the sedimentation tank, and the bottom end of the mud bucket (11) is communicated with a mud discharge pipeline (12); the flow guide device (13) is arranged in the mud bucket (11) and used for guiding the mud. According to the vertical flow type sedimentation tank, the flow guide device is arranged at the position of the sludge hopper at the bottom of the tank, so that the sludge discharge efficiency is improved, sludge at the bottom of the tank can be fully discharged, moisture brought out by mixed discharge is reduced, the sludge discharge efficiency is improved, and the water content of discharged sludge is reduced.

Description

Sludge discharge system of vertical flow type sedimentation tank, sedimentation tank and sewage treatment system

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to a sludge discharge system of a vertical flow type sedimentation tank, the sedimentation tank and a sewage treatment system.

Background

The sedimentation tank is a device for removing suspended matters in water and purifying water quality by applying sedimentation. The working principle is to remove suspended substances in water by utilizing the natural sedimentation or coagulating sedimentation effect of water, and the sedimentation effect is determined by the flow rate of the water in the sedimentation tank and the retention time of the water in the tank. Sedimentation tanks have wide market requirements and applications in the field of water treatment, and sedimentation tank technology is used in almost all water treatment projects. The bottom of the vertical sedimentation tank is a funnel-shaped cone, and sludge is precipitated, concentrated and accumulated at the bottom of the tank in the prior practical application. The sludge discharge mode adopted by the vertical sedimentation tank is that a sludge discharge pipe is arranged at the bottom or the top of the tank, and a sludge discharge valve is connected at the outer joint of the sludge discharge pipe to control the sludge discharge. However, in actual operation, it is often the case that sludge in the central area of the sludge settling zone at the bottom of the tank collapses rapidly during sludge discharge to form a funnel-shaped cavity, and with the increase of flow rate and flow rate, peripheral sludge is not discharged completely, and clear water on the upper layer enters the sludge discharge port directly and smoothly with the sludge outlet as the center, and with the rapid formation of mixed flow of sludge and water, water becomes a main discharge body, and a large amount of peripheral sludge still adheres to the slope surface at the bottom of the tank, and is difficult to discharge.

SUMMERY OF THE UTILITY MODEL

Objects of the utility model

The utility model aims to provide a sludge discharge system of a vertical sedimentation tank, the sedimentation tank and a sewage treatment system so as to solve the technical problem that a large amount of sludge remains on the slope surface of a sludge hopper in the prior art.

(II) technical scheme

In order to solve the above problems, a first aspect of the present invention provides a sludge discharge system for a vertical sedimentation tank, the sludge discharge system being disposed at the bottom of the sedimentation tank and used for discharging sediment; it includes: the mud bucket is arranged at the bottom of the sedimentation tank, and the bottom end of the mud bucket is communicated with a mud discharge pipeline; and the flow guide device is arranged in the mud bucket and is used for guiding the mud.

Further, the flow guiding device is a double cone.

Further, the bottom surface of the double cone is perpendicular to the water inlet direction.

Further, the double cones match the shape of the mud bucket.

Further, the flow guide device includes: a first right circular cone; the second straight cone and the second straight cone share the bottom surface, and the vertex of the second straight cone, the vertex of the first straight cone and the central point of the outlet of the water inlet system are on the same vertical straight line.

Further, the flow guide device includes: the height of the second straight cone is larger than that of the first straight cone.

Further, the slope of the mud bucket is smaller than the slope of the second straight cone inclined plane.

Further, still include: a reflective cone disposed between the flow guide and an outlet of the water intake system.

According to a further aspect of the present invention, there is provided a vertical sedimentation tank comprising a sludge discharge system of the vertical sedimentation tank according to any one of the above aspects.

According to another aspect of the present invention, there is provided a sewage treatment system comprising the sludge discharge system of the vertical sedimentation tank according to any one of the above aspects.

(III) advantageous effects

The technical scheme of the utility model has the following beneficial technical effects:

according to the vertical flow type sedimentation tank, the flow guide device is arranged at the position of the sludge hopper at the bottom of the tank, so that the sludge discharge efficiency is improved, sludge at the bottom of the tank can be fully discharged, moisture brought out by mixed discharge is reduced, the sludge discharge efficiency is improved, and the water content of discharged sludge is reduced.

Drawings

Fig. 1 is a schematic view of a sludge discharge system of a vertical flow type settling tank according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a water intake system and a water discharge system according to an embodiment of the present invention.

Fig. 3 is a schematic view of a drainage system according to yet another embodiment of the present invention.

Reference numerals:

1: a sludge discharge system; 11: a mud bucket; 12: a sludge discharge pipeline; 13: a flow guide device; 131: a first right circular cone; 132: a second right circular cone; 14: a reflecting cone; 15: a mud valve; 2: a drainage system; 21: a scum baffle; 22: a drainage channel; 23: a dovetail groove; 3: a water intake system; 31: a water inlet pipe; 32: a medicine feeding pipe; 33: a first reactor; 34: a first concentration tube; 35: a second reactor; 36: a second concentration tube; 37: a slow release tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the drawings a schematic view of a layer structure according to an embodiment of the utility model is shown. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.

It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The utility model will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

FIG. 1 is a schematic view of a vertical sedimentation tank according to an embodiment of the present invention.

As shown in fig. 1, in an embodiment of the present invention, a sludge discharge system of a vertical sedimentation tank is provided, which is disposed at the bottom of the sedimentation tank and is used for discharging sediment; it includes: the mud bucket is arranged at the bottom of the sedimentation tank, and the bottom end of the mud bucket is communicated with a mud discharge pipeline; and the flow guide device is arranged in the mud bucket and is used for guiding the mud. According to the vertical flow type sedimentation tank, the flow guide device is arranged at the position of the sludge hopper at the bottom of the tank, so that the sludge discharge efficiency is improved, sludge at the bottom of the tank can be fully discharged, moisture brought out by mixed discharge is reduced, the sludge discharge efficiency is improved, and the water content of discharged sludge is reduced.

In an alternative embodiment, a deflector 13 is arranged directly below the outlet of the water inlet system 3 for guiding the sludge.

In an optional embodiment, the vertical sedimentation tank may further include: and the mud discharging valve 15 is communicated with the mud discharging pipeline 12 and used for controlling the mud discharging pipeline 12 to start/stop discharging mud.

In an alternative embodiment, the flow guiding device 13 is a double cone.

In an alternative embodiment, the bottom surface of the double cone is perpendicular to the water inlet direction.

In an alternative embodiment, the double cone matches the shape of the hopper 11.

In a preferred embodiment, the vertical sedimentation tank is a circular tank and the mud bucket 11 is a conical bucket.

In a preferred embodiment, the vertical sedimentation tank body is cylindrical and is made of carbon steel or glass fiber reinforced plastic.

In a preferred embodiment, the reflection cone 14 is a straight cone, the apex of which is arranged directly below the outlet of the water inlet system 3. The reflecting cone 14 is a conical umbrella-shaped device, the tip of the reflecting cone is upwards aligned with the water outlet of the water inlet system 3, and the bottom of the reflecting cone is parallel to the horizontal plane of the tank body.

The sewage is buffered and distributed by the outlet of the water inlet system 3 through the umbrella-shaped reflecting cone 14, enters a settling zone and a buffer zone of the sedimentation tank, is concentrated to form settled solids, and realizes solid-water separation.

In a preferred embodiment, the flow guiding device 13 may include: a first straight cone 131; a second straight cone 132 sharing a base with the second straight cone 132, wherein the vertex of the second straight cone 132, the vertex of the first straight cone 131, and the center point of the outlet of the water inlet system 3 are on the same vertical line.

In an alternative embodiment, the flow guiding device 13 may comprise: the height of the second straight cone 132 is greater than the height of the first straight cone 131.

In an alternative embodiment, the slope of the hopper 11 is less than the slope of the second straight cone 132.

Flow guide device 13 is a hollow straight cone, by the vertical connecting piece of four sides symmetry with the straight cone flow guide device 13 is fixed on the domatic of hourglass hopper-shaped mud fill 11, straight cone flow guide device 13 is perpendicular to be close the mud discharging port downwards, straight cone

flow guide device

13 and 11 bottom of the pool slopes of hourglass hopper-shaped mud fill are 25 degrees contained angles, and the side of cone and 11 bottom of the pool slope surfaces of hourglass hopper-shaped mud fill have formed the guiding gutter between being.

The sludge is pressed into the sludge discharge pipe 12 by the water under the action of the self gravity and the water pressure. Due to the existence of the flow guide device 13 above the sludge outlet, a flow guide groove is formed between the outer surface of the flow guide device 13 and the pool bottom slope wall at the pool bottom, and sludge is pressed into the sludge outlet through the flow guide groove. The mud in bottom of the pool center can not be dug out the cavity by water, and the mud of deposit on the bottom of the pool slope originally can be arranged.

In an optional embodiment, the vertical sedimentation tank is a triangular prism tank, and the mud bucket 11 is a triangular pyramid bucket.

In an alternative embodiment, the reflecting cone is a straight triangular pyramid.

In an alternative embodiment, the vertical sedimentation tank is a quadrangular prism tank, and the mud bucket 11 is a quadrangular pyramid bucket.

In an alternative embodiment, the reflecting cone is a straight quadrangular pyramid.

In an alternative embodiment, the vertical sedimentation tank is a multi-prism tank, and the mud bucket 11 is a multi-pyramid bucket.

In an alternative embodiment, the reflecting cone is a straight polygonal cone.

In an optional embodiment, the vertical sedimentation tank may further include: a reflecting cone 14 arranged between the deflector 13 and the outlet of the water inlet system 3.

In another embodiment of the present invention, as shown in fig. 2, there is provided a sedimentation tank comprising a sludge discharge system of the vertical sedimentation tank according to any one of the above technical aspects.

In an alternative embodiment, the sedimentation tank is a vertical sedimentation tank.

In an optional embodiment, the sedimentation tank may further include: and the drainage system 2 is arranged at the top of the sedimentation tank and is used for discharging the settled clean water.

In an alternative embodiment, the drainage system 2 may comprise: a scum baffle 21, which is arranged inside the tank wall and matches the shape of the tank wall, surrounds the entire settling tank. The scum baffle 21 forms a guide chute (drainage path) with the tank wall.

In an alternative embodiment, the scum baffle 21 and the pool wall form an outlet diversion trench (drainage path) with the width of about 30mm and the depth of about 500mm, so that the traditional outlet trench without a water channel baffle is replaced, and the outlet water quality is improved.

In an alternative embodiment, the drainage system 2 may comprise: and a drain channel 22 disposed on a top of the scum baffle 21, wherein the scum baffle 21 serves as one side plate of the drain channel 22, and the other side plate of the drain channel 22 is at the same level as a top end of the scum baffle 21.

In an alternative embodiment, the dross baffle 21 has a dovetail groove 23 at the top.

The dovetail 23 is arranged at the sedimentation tank top, lays with pool wall parallel, and remains about 30 mm's space between the pool wall, and the dross baffle 21 upper end in the dovetail 23 outside is dovetail 23, and lower extreme downwardly extending is about 500mm does dross baffle 21, when the surface of water height of sedimentation tank reached the height of dovetail 23, the gap between dross baffle 21 and the pool wall formed out the water guiding gutter, and the clear water is through going out the water guiding gutter, crosses dovetail 23 again, flows into water drainage channel 22. Scum foam and the like usually appearing on the water surface of the sedimentation tank can not enter the drainage channel 22, so that scum is not attached to the discharged water, and the quality of the discharged water is improved.

In an alternative embodiment, as shown in fig. 3, the drainage system 2 may comprise: and the drainage channel 22 is arranged on the outer side of the top of the pool wall, the pool wall is used as one side plate of the drainage channel 22, and the other side plate of the drainage channel 22 is at the same level with the top end of the pool wall.

In an alternative embodiment, the top of the pool wall has a dovetail groove 23.

In an alternative embodiment, the drain channel 22 communicates with a drain line.

The dovetail groove 23 is arranged at the top of the sedimentation tank, the lower end of the scum baffle 21 extends downwards for about 500mm to form the scum baffle 21, when the water level of the sedimentation tank reaches the height of the dovetail groove 23, a water outlet diversion trench is formed in a gap between the scum baffle 21 and the tank wall, and clean water passes through the water outlet diversion trench and then passes over the dovetail weir to flow into the drainage channel 22. Scum foam and the like usually appearing on the water surface of the sedimentation tank can not enter the water outlet tank, so that the scum is not attached to the outlet water, and the quality of the outlet water is improved.

In an optional embodiment, a valve is arranged on the drainage pipeline. The valve is used to control the drainage system 2 to start/stop drainage.

The existing sedimentation tank often has lighter dross to float on the surface of water, and the dross together crosses the dovetail along with the clear water, flows into the drainage canal, influences the play water quality. The clean water in the sedimentation tank of the utility model rises along the path formed by the scum baffle 21 and the tank wall, crosses the dovetail groove 23, enters the drainage channel 22 and is discharged. Through the width that reduces the drainage route and arrange mud around the pool wall of sedimentation tank, effectually avoided the dross to flow along with the clear water, improved the quality of drainage, increased sewage treatment's efficiency.

In an alternative embodiment, a restriction is provided between the scum baffle 21 and the tank wall. By means of the flow restriction, the width of the drainage path between the scum baffle 21 and the tank wall is further reduced, further reducing scum carried along with the clean water.

In an alternative embodiment, the dross baffle 21 is spaced from the wall by: 20-50 mm.

In an alternative embodiment, the drainage system 2 may further comprise: a drain pipe which is communicated with the drain channel 22 and is provided with a valve.

Through the drainage channel 22 outside the design of dross baffle 21, the cooperation of dross baffle 21 and pool wall has restricted the width in play water route, has more restricted the discharge of mainly concentrating the dross at the cell body center, and the main region of dross has been kept away from in the play water route of narrow, has avoided the surface of water dross to get into drainage channel 22 to the play water quality of water has been improved.

In an optional embodiment, the sedimentation tank may further include: and the water inlet system 3 is arranged at the top of the sedimentation tank, extends to the inside of the sedimentation tank and is used for enabling sewage to enter the sedimentation tank and/or adding medicines into the sewage.

In an alternative embodiment, the water inlet system 3 may comprise: a water inlet pipe 31 provided at the top of the tank; a dosing pipe 32 arranged at the top of the tank; the first reactor 33, the first reactor 33 is respectively communicated with the water inlet pipe 31 and the dosing pipe 32; a first concentration tube 34, the first concentration tube 34 being in communication with the reactor, and the axial area of the first concentration tube 34 being smaller than the cross-sectional area of the first reactor 33; a second reactor 35, said second reactor 35 being in communication with said first concentrator tube 34; a second concentration tube 36, the second concentration tube 36 being in communication with the reactor, and the axial area of the second concentration tube 36 being smaller than the cross-sectional area of the second reactor 35; a slow release tube 37 in communication with the second concentration tube 36. Through setting up add pencil 32 first reactor 33 second reactor 35 has simplified the medicine process of adding, has cancelled independent reaction tank to practice thrift the construction cost, promoted the efficiency of medicine mixing reaction.

In an alternative embodiment, the outlet of the slow release tube 37 is located in the center of the sedimentation tank.

The water inlet pipe 31 is controlled by a water inlet valve, and the pipeline and the top surface of the sedimentation tank are horizontally arranged. The water inlet pipe 31 extends to the central position of the sedimentation tank and bends downwards by 90 degrees, and is vertically opened downwards and connected with the reactor.

The dosing pipe 32 and the water inlet pipe 31 are both arranged at the top of the tank (or communicated with the tank), the dosing pipe 32 is connected with a timing metering valve, and the other end of the dosing pipe is connected with a medicine tank.

In an alternative embodiment, the first reactor 33 is located at the center of the sedimentation tank, vertically connected to the water inlet pipe, and vertically extended downward to the center of the tank body. The reactors (the first reactor 33 and the second reactor 35) have two or more thick and thin diameter changes, the thick pipe is a reactor, the thin pipe is a concentration pipe (the second concentration pipe 36 and the first concentration pipe 34), and the tail end of the reaction pipe is connected with the slow release pipe 37.

The center of the slow release pipe 37 is vertically connected with the reaction pipe and is parallel to the water level of the sedimentation tank.

In another embodiment of the present invention, there is provided a sewage treatment system comprising the sludge discharge system of the vertical sedimentation tank according to any one of the above aspects.

The raw water gets into a reactor with sedimentation tank parallel arrangement with power promotion or gravity from the mode of flowing, carries out intensive mixing with the chemical reagent that adds simultaneously and stirs and take place the reaction, make the suspended solid behind the quick flocculation and formation alum blossom, enter into the settling zone of sedimentation tank, buffer zone, form and sink solid thing, realize solid-water separation, the rivers after settling clear are through the pipe chute that sets up in the middle of the sedimentation tank, rise to the pond top and discharge through horizontal weir overflow drainage canal 22, it is external through discharging device to sink solid thing to the V type groove concentration back in bottom of the pool mud district.

After a period of natural precipitation or coagulating sedimentation, the cement in the sedimentation tank is layered, the upper middle layer is clear water, and the lower layer is sludge.

The drainage channel 22 is arranged at the top of the sedimentation tank, the drainage channel 22 is flush with the upper end of the tank wall and surrounds the tank wall for a circle, and the clear water on the upper layer after the sedimentation reaction flows into the drainage channel 22 through the dovetail groove 23 and then flows into the drainage pipe to enter the next procedure.

The whole work efficiency that has promoted has reduced construction and operation maintenance cost, has promoted play mud quality and play water quality.

The sedimentation tank of the utility model has the working process that:

the user opens the water inlet valve and sewage enters the first reactor 33 through the water inlet pipe 31.

The user opens the timed metering valve and the medicament enters the first reactor 33 through the dosing tube 32.

The sewage and the medicine are primarily mixed and reacted in the first reactor 33, then flow into the first concentration pipe 34, enter the second reactor 35 after primary concentration, and the sewage after primary reaction is impacted and stirred in the pipe wall to be fully mixed and reacted with the added medicine.

The sewage and the medicament after the mixing reaction flow into the slow release pipe 37, are buffered and distributed from the slow release pipe 37 to the umbrella-shaped reflecting cone 14, enter a settling area and a buffer area of a sedimentation tank, and are concentrated to form settled solids, so that solid-water separation is realized. After entering the sedimentation tank, the sewage flowing into the sedimentation tank undergoes flocculation reaction, and the agglomerated suspended matters fall into the bottom of the tank to form sludge through coagulating sedimentation under the action of gravity.

The clean water in the sedimentation tank forms a diversion trench with the tank wall through the scum baffle 21, and then flows into the drainage channel 22 after passing through the dovetail groove 23. The valve on the drainage pipeline is opened, and the clean water in the drainage channel 22 is discharged by the drainage pipeline for reuse. Scum foam and the like usually appearing on the water surface of the sedimentation tank can not enter the drainage channel 22, so that scum is not attached to the discharged water, and the quality of the discharged water is improved.

The utility model aims to protect a sludge discharge system, a sedimentation tank and a sewage treatment system of a vertical flow sedimentation tank, wherein the sludge discharge system is arranged at the bottom of the sedimentation tank and used for discharging sediments; it includes: the mud bucket is arranged at the bottom of the sedimentation tank, and the bottom end of the mud bucket is communicated with a mud discharge pipeline; and the flow guide device is arranged in the mud bucket and is used for guiding the mud. According to the vertical flow type sedimentation tank, the flow guide device is arranged at the position of the sludge hopper at the bottom of the tank, so that the sludge discharge efficiency is improved, sludge at the bottom of the tank can be fully discharged, moisture brought out by mixed discharge is reduced, the sludge discharge efficiency is improved, and the water content of discharged sludge is reduced.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A sludge discharge system of a vertical flow sedimentation tank is characterized in that the sludge discharge system (1) is arranged at the bottom of the sedimentation tank and used for discharging sediments; it includes:

the mud bucket (11) is arranged at the bottom of the sedimentation tank, and the bottom end of the mud bucket (11) is communicated with a mud discharge pipeline (12);

the flow guide device (13) is arranged in the mud bucket (11) and used for guiding the mud.

2. The sludge discharge system of a vertical sedimentation tank of claim 1,

the flow guide device (13) is a double cone.

3. The sludge discharge system of a vertical sedimentation tank of claim 2,

the bottom surface of the double cone is vertical to the water inlet direction.

4. The sludge discharge system of a vertical sedimentation tank of claim 2,

the double cones are matched with the shape of the mud bucket (11).

5. A sludge discharge system of a vertical sedimentation tank according to claim 4, wherein the flow guide device (13) comprises:

a first straight cone (131);

a second straight cone (132) sharing a base with the second straight cone (132), wherein the vertex of the second straight cone (132), the vertex of the first straight cone (131), and the center point of the sedimentation tank are on the same vertical line.

6. A sludge discharge system of a vertical sedimentation tank according to claim 5, wherein the flow guide device (13) comprises:

the height of the second straight cone (132) is greater than the height of the first straight cone (131).

7. The sludge discharge system of a vertical sedimentation tank according to claim 5,

the slope of the mud bucket (11) is smaller than that of the slope of the second straight cone (132).

8. The vertical flow sedimentation tank sludge discharge system according to any one of claims 1 to 7, further comprising:

a reflection cone (14) arranged between the flow guiding device (13) and an outlet of the water inlet system (3).

9. A sedimentation tank, characterized by comprising a sludge discharge system of a vertical flow sedimentation tank according to any one of claims 1 to 8.

10. A sewage treatment system comprising the sludge discharge system of the vertical sedimentation tank of any one of claims 1 to 8.