CN216639127U - Precipitation-concentration-ultrafiltration membrane pool - Google Patents

Abstract

The utility model discloses a sedimentation-concentration-ultrafiltration membrane pool, which comprises a pool body and a main water inlet channel, wherein the main water inlet channel is erected in the pool body and is positioned above the bottom of the pool body, and the main water inlet channel extends along the longitudinal direction of the pool body so that water in the main water inlet channel is uniformly and longitudinally arranged in the membrane pool. According to the utility model, the ultrafiltration membrane component and the sludge concentrator are arranged in the tank body for matching use, so that solid-liquid separation can be carried out on wastewater containing flocs, the flocs are settled, and simultaneously, the settled sludge is concentrated and then is discharged or circulated; the method can integrate the functions of precipitation, concentration and ultrafiltration, has simple whole water treatment process flow, can shorten the water treatment process flow, reduce the number of equipment and reduce the quantity of civil engineering.

Description

Precipitation-concentration-ultrafiltration membrane pool

Technical Field

The utility model belongs to the technical field of water treatment, and relates to a precipitation-concentration-ultrafiltration membrane pool.

Background

For the industrial wastewater treatment and recycling process mainly aiming at removing suspended matters, hardness and desalination, the common water treatment process flow is to sequentially carry out coagulating sedimentation, filtration, ultrafiltration and reverse osmosis. The high-density sedimentation tank has the advantages of small occupied area and high treatment efficiency, and is widely applied to a coagulating sedimentation process; ultrafiltration is generally used as a pretreatment system of a reverse osmosis process, ensures the long-term stable and safe operation of subsequent equipment such as reverse osmosis and the like, and is an important component of a wastewater advanced treatment system. Between the coagulating sedimentation and the ultrafiltration, a filter tank or a filter is usually required to be arranged as a connecting process, so that the water treatment process is long in flow, large in equipment quantity, large in civil engineering quantity and the like.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a precipitation-concentration-ultrafiltration membrane tank, which makes the whole water treatment process simpler, shortens the water treatment process, reduces the number of equipment, and reduces the quantity of civil engineering.

The sedimentation-concentration-ultrafiltration membrane pool comprises a pool body and a main water inlet channel, wherein the main water inlet channel is erected in the pool body and is positioned above the bottom of the pool body, and the main water inlet channel extends along the longitudinal direction of the pool body so that water in the main water inlet channel is uniformly and longitudinally arranged in the membrane pool.

Furthermore, still include a plurality of distribution branch canal with the main canal intercommunication of intaking, the distribution branch canal transversely extends, the distribution branch canal is provided with two sets ofly and sets up in the horizontal both sides of main canal of intaking, the distribution branch canal bottom has evenly seted up the water distribution hole.

Further, the cell body is the cuboid, the main canal of intaking sets up in the horizontal middle part position of cell body.

Furthermore, the two groups of water distribution branch channels are transversely and symmetrically arranged on two sides of the water inlet main channel.

Further, the distances between the longitudinally adjacent water distribution branch channels are equal.

Furthermore, the bottom of the tank body is square, and the four corners of the tank body are rounded.

Furthermore, an immersed ultrafiltration membrane assembly mounting position is arranged in the tank body, and the ultrafiltration membrane assembly mounting position is positioned above the tank bottom and below the main water inlet channel, so that the ultrafiltration membrane assembly is arranged in the tank body in an overhead manner.

The utility model has the beneficial effects that:

the submerged ultrafiltration membrane component is arranged in the tank body and is matched with the sludge concentrator for use, so that solid-liquid separation can be performed on wastewater containing flocs, the flocs can be settled, and simultaneously, the settled sludge is concentrated and then is discharged or circulated; the method can integrate the functions of precipitation, concentration and ultrafiltration, has simple whole water treatment process flow, can shorten the water treatment process flow, reduce the number of equipment and reduce the quantity of civil engineering.

Drawings

The utility model is further described below with reference to the figures and examples.

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic cross-sectional view;

Detailed Description

As shown in the figure: the embodiment provides a deposit-concentrated-ultrafiltration membrane pond, including membrane cisterna 10, milipore filter subassembly 20, ultrafiltration suction pump 30, back flush pump 40, sludge discharge pump 50 and sludge concentrator 60, milipore filter subassembly 20 is located the membrane cisterna and built on stilts the setting in membrane cisterna bottom of the pool top, the water inlet of ultrafiltration suction pump 30 and the delivery port of back flush pump 40 and the delivery port intercommunication of milipore filter subassembly 20, the bottom of the pool of membrane cisterna 10 is equipped with the drain, sludge discharge pump 50's import and drain intercommunication, sludge concentrator 60 sets up and is used for scraping the precipitate at the bottom of the pool and makes the concentrate of precipitate concentrate in drain department in the bottom of the pool of membrane cisterna 10.

The water inlet end of the whole membrane pool is connected with the coagulation reaction area and the flocculation area at the front end, wherein the coagulation reaction area and the flocculation area both adopt the existing structures, and the details are not repeated; a mounting bracket can be arranged on the inner side wall of the membrane tank 10, the ultrafiltration membrane module 20 is mounted on the mounting bracket, so that the ultrafiltration membrane module 20 is arranged above the bottom of the membrane tank in an overhead manner, and the sludge scraping main body part of the sludge thickener 60 is positioned below the ultrafiltration membrane module 20 and is used for scraping sediments at the bottom of the tank and concentrating the sediments; the middle part of the sludge thickener 60 is provided with a driving shaft which extends upwards to the outside of the top of the membrane pool 10 and is in transmission fit with a driving part, the sludge thickener 60 directly purchases the existing equipment, the sludge thickener 60 in the embodiment adopts an NZS type central transmission thickener, of course, other types of equipment can be adopted, and the details are not repeated herein; the part of the membrane pool below the position 20 of the ultrafiltration membrane component is used as a sedimentation and sludge concentration area, a concentrated sludge thickener is arranged in the sedimentation and sludge concentration area, as shown in figure 2, a sewage discharge outlet is positioned under a driving shaft of the sludge thickener 60, the middle part of a mud bucket of the sludge thickener 60 is provided with a sludge gathering port, the gathering port is communicated with the sewage discharge outlet, when the sludge thickener 60 rotates, the sludge at the bottom of the membrane pool 10 can be gathered at the gathering port and enters the sewage discharge outlet, the sewage discharge outlet is communicated with a sewage discharge pipe, and the sewage discharge pipe is externally connected with a sludge discharge pump 50 for forced sewage discharge;

when the ultrafiltration membrane component is in normal operation, the ultrafiltration membrane component is completely immersed below a normal operation liquid level; as shown in fig. 2, a back-washing highest liquid level B is also arranged above the normal operation liquid level a of the membrane pool 10, the volume between the normal operation liquid level and the back-washing highest liquid level is not less than the amount of once back-washing water, and the total height of the pool is higher than the highest liquid level B; the ultrafiltration membrane component is used for carrying out solid-liquid separation on the wastewater containing the flocs, the ultrafiltration membrane component 20 is purchased from the existing equipment, in the embodiment, the ultrafiltration membrane component 20 adopts an immersed EUF curtain type membrane module device, and of course, other types of equipment can be adopted, and the details are not repeated; the ultrafiltration membrane module 20 discharges the purified ultrafiltration product water through the ultrafiltration suction pump 30, the ultrafiltration product water can be directly used as the inlet water of the next reverse osmosis, and can also be used as the inlet water of the backwashing pump 40 for backwashing of the ultrafiltration membrane module 20, and the whole water treatment process flow is more simplified.

In this embodiment, still include sludge circulating pump 70, sludge circulating pump 70's import and drain intercommunication, sludge circulating pump 70's export is used for making partial mud backward flow to the flocculation area in with flocculation area intercommunication. The settlement performance of solid particles in the wastewater is also promoted through contact flocculation by the sludge in the membrane tank 10, so that the sewage discharge port is externally connected with a circulating pipe, the circulating pipe is communicated with the inlet of the sludge circulating pump 70, and the outlet of the sludge circulating pump 70 is communicated with the circulating port of the flocculation area, so that part of the sludge can circulate in the flocculation area, and the settlement efficiency of the solid particles is improved.

In this embodiment, the membrane tank 10 includes a tank body 11 and a main water inlet channel 12, the main water inlet channel 12 is erected in the tank body and located above the ultrafiltration membrane module 20, and the main water inlet channel extends along the longitudinal direction of the tank body so that the water in the main water inlet channel is uniformly arranged in the membrane tank 10 in the longitudinal direction. In this embodiment, the horizontal direction corresponds to the vertical direction in fig. 1, and the vertical direction corresponds to the horizontal direction in fig. 1, as shown in fig. 1, a water inlet channel 14 is disposed outside the left portion of the tank body 11, a water inlet gate 15 is disposed above the water inlet channel 14, the water inlet gate 15 is communicated with the main water inlet channel, and the main water inlet channel 12 is disposed in the vertical direction of the tank body 11, so as to facilitate the uniform arrangement of the water in the main water inlet channel in the tank body 11, and improve the settling efficiency and the solid-liquid separation efficiency.

In this embodiment, be equipped with milipore filter subassembly installation position in cell body 11, milipore filter subassembly installation position is located bottom of the pool top and is located into water main canal 12 below to make milipore filter subassembly overhead mounting in the cell body. The ultrafiltration membrane component mounting position can be a bracket mounted on the inner side wall of the tank body, the bracket can be fixed on the inner wall of the tank body through expansion bolts or pre-embedded bolts, the ultrafiltration membrane component is mounted on the bracket, and certainly, the ultrafiltration membrane component mounting position can also be other existing structures which can be used for mounting the ultrafiltration membrane component, and the description is omitted here;

in this embodiment, the membrane tank 10 further includes a plurality of water distribution branch channels 13 communicated with the main water inlet channel 12, the water distribution branch channels 13 extend transversely and are located above the ultrafiltration membrane module 20, the water distribution branch channels 13 are provided with two groups and are respectively disposed on two transverse sides of the main water inlet channel 12, and water distribution holes are uniformly formed in the bottoms of the water distribution branch channels 13. The branch water distribution channels 13 are inclined downward and are transversely far away from the main water inlet channel, and as shown in fig. 1, for clearly showing the overall structure, in fig. 1, the branch water distribution channels 13 located on the right side in the membrane tank 10 and the ultrafiltration membrane module 20 located on the left side in the membrane tank 10 are not shown, so that transverse uniform water distribution is facilitated through the plurality of branch water distribution channels 13, and the main water inlet channel 12 and the branch water distribution channels 13 cooperate to facilitate uniform water distribution in the spatial range of the membrane tank 10.

In this embodiment, the ultrafiltration membrane modules 20 are provided in two sets and are respectively disposed on two lateral sides of the main water inlet channel 12. As shown in FIG. 1, the two sets of filter membrane assemblies 20 are matched with the two sets of water distribution branch channels 13 to ensure uniform water distribution and simultaneously help to ensure that the use degree of each filter membrane assembly 20 is kept consistent.

In this embodiment, the tank body 11 is a rectangular parallelepiped, and the main water inlet channel 12 is disposed at a transverse middle position of the tank body 11. It should be noted here that the cube is a special cuboid, and the main water intake channel 12 arranged in the middle is beneficial to ensure that the water amount distributed on the two lateral sides of the main water intake channel is basically consistent.

In this embodiment, the two groups of branch water distribution channels 13 are transversely and symmetrically disposed on two sides of the main water inlet channel 12. In the present embodiment, the distances between longitudinally adjacent distribution channels 13 are equal. And the uniformity of water distribution is further ensured by a symmetrical and equidistant arrangement mode.

In this embodiment, the bottom of the tank body 11 is square, and the four corners of the tank body are rounded. The four corners of the tank body are smeared by concrete to form a fillet structure, and the structure is adapted to the mud bucket rotating structure of the sludge thickener 60, so that mud can be scraped uniformly at the bottom of the membrane tank 10.

According to the time sequence, one operation cycle of the device comprises the procedures of normal water inlet precipitation filtration, back washing, standing precipitation and sludge discharge.

Normal influent precipitation filtration process: the water inlet gate is opened, raw water containing alum floc after flocculation reaction enters the water inlet main channel, and then water is uniformly distributed through the water distribution branch channels; raw water flows downwards through the space where the ultrafiltration membrane component is positioned, and ultrafiltration produced water separated by the membrane flows out under the action of an ultrafiltration suction pump 20; floccules intercepted by an ultrafiltration membrane of the ultrafiltration membrane group continue to precipitate downwards under the action of gravity, one part of sludge formed by precipitation is concentrated by a sludge concentrator and then flows back to the flocculation area through a sludge return pipe, and the other part of sludge is discharged outwards through a sludge discharge pipe;

a backwashing process: when the transmembrane pressure difference reaches a set value, the ultrafiltration suction pump is closed, the sludge circulating pump, the sludge discharge pump and the water inlet gate are closed, the backwashing pump is started, and ultrafiltration product water reversely permeates the ultrafiltration membrane to remove surface sediments of membrane filaments. After the back washing is finished, the liquid level rises to the highest back washing liquid level B, and the back washing pump is closed.

Standing and precipitating: the backwash water containing flocs is allowed to settle by standing for a period of time determined by the above-mentioned sedimentation test of flocs in the sedimentation and sludge concentration zones.

A sludge discharge process: after the standing and precipitation is finished, immediately entering a sludge discharge working procedure, starting a sludge discharge pump, discharging sludge generated after back washing out of the system, simultaneously opening a water inlet gate, starting an ultrafiltration suction pump, and enabling the membrane tank 10 to enter a normal precipitation and filtration process again.

The chemical cleaning of the ultrafiltration membrane module 20 is performed off-line outside the membrane tank 10. The cleaning frequency is comprehensively determined according to the type of the ultrafiltration membrane and the water quality of raw water.

The precipitation-concentration-ultrafiltration membrane pool can be used as one group, and a plurality of groups can be used in parallel; when the system is used in parallel, one group enters a backwashing process, and other groups can operate according to a normal precipitation filtration process under the condition of properly increasing the flux of the ultrafiltration membrane, so that the continuous operation of the whole system can be realized, and the total water treatment amount is not influenced.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (7)

1. A sedimentation-concentration-ultrafiltration membrane tank, which is characterized in that: the membrane bioreactor comprises a tank body and a main water inlet channel, wherein the main water inlet channel is erected in the tank body and is positioned above the bottom of the tank, and the main water inlet channel extends along the longitudinal direction of the tank body so that water in the main water inlet channel is uniformly and longitudinally arranged in the membrane tank.

2. The sedimentation-concentration-ultrafiltration membrane tank of claim 1, wherein: the water distribution main channel is characterized by further comprising a plurality of water distribution branch channels communicated with the water inlet main channel, the water distribution branch channels transversely extend, the water distribution branch channels are provided with two groups and are respectively arranged on two transverse sides of the water inlet main channel, and water distribution holes are uniformly formed in the bottom of each water distribution branch channel.

3. The sedimentation-concentration-ultrafiltration membrane tank of claim 2, wherein: the cell body is the cuboid, the main canal that intakes sets up in the horizontal middle part position of cell body.

4. The sedimentation-concentration-ultrafiltration membrane tank of claim 2, wherein: and the two groups of water distribution branch channels are transversely and symmetrically arranged on two sides of the water inlet main channel.

5. The sedimentation-concentration-ultrafiltration membrane tank of claim 2, wherein: the distances between every two longitudinally adjacent water distribution branch channels are equal.

6. The sedimentation-concentration-ultrafiltration membrane tank of claim 3, wherein: the bottom of the tank body is square, and the four corners of the tank body are smeared to form round corners.

7. The sedimentation-concentration-ultrafiltration membrane tank of claim 1, wherein: the ultrafiltration membrane component mounting position is arranged above the bottom of the tank and below the main water inlet channel, so that the ultrafiltration membrane component is arranged in the tank in an overhead manner.

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