CN215048998U - Energy-efficient formula MBR device - Google Patents

Abstract

An embodiment of the utility model provides an energy-efficient formula MBR device, include: a water inlet system, a membrane module system, a water outlet system, an aeration system, a backwashing system and a membrane pool; the water inlet system leads the sewage to be treated to enter the membrane tank; the membrane group device system is arranged in the membrane pool and used for purifying the sewage to be treated entering the membrane pool; the water outlet system is connected with the membrane module system and is used for discharging the purified produced water out of the membrane pool; the aeration system is connected with the membrane module system and provides air required by aeration for the membrane module system; and the backwashing system is connected with the membrane module system and used for carrying out online chemical backwashing on the membrane module system so as to recover the running state of the membrane module system. The embodiment of the utility model provides an energy-efficient formula MBR device improves sewage treatment efficiency, reduces sewage treatment cost, improves gaseous intensity of cleaning to the membrane module surface simultaneously, effectively slows down membrane pollution rate, saves equipment investment and operation maintenance cost.

Description

Energy-efficient formula MBR device

Technical Field

The utility model relates to a sewage treatment technical field especially relates to an energy-efficient formula MBR device.

Background

With the rapid development of economy in China, the consumption of water resources is multiplied, so that not only is the shortage of water resources caused, but also the generation of sewage is increased, and the society and the economic efficiency are increasedThe burden on the environment. According to statistics, more than 300 cities in more than 600 cities in China have water shortage, wherein more than 100 cities have serious water shortage, and the annual water shortage is nearly 60 hundred million meters³The economic loss caused by water shortage is about 2000 billion yuan RMB each year. Therefore, the effective product development of the sewage treatment technology is urgently needed, and the water resource recycling degree is improved.

The Membrane Bioreactor (MBR) is a novel sewage treatment technology combining an efficient Membrane separation technology and a biotechnology, utilizes the efficient interception performance of a Membrane separation component to carry out rapid solid-liquid separation, has the characteristics of good and stable effluent quality, high treatment load, low residual sludge yield, small occupied area, simple operation and management and the like, is the most advanced technology in the current secondary treatment stage, and has wide development prospects in the markets of urban sewage treatment, upgrading modification, reclaimed water recycling and the like.

The core equipment of MBR sewage treatment technology is a membrane group device which mainly comprises four parts, namely a membrane module, a group device frame, a water collecting system and an aeration system. The hollow fiber curtain type membrane is a common membrane component form and comprises hundreds of hollow fiber membrane filaments and membrane boxes at two ends of the membrane filaments, when in filtration, clear water permeates into hollow pipelines at the inner parts of the membrane filaments from the outer parts of the membrane filaments through micropores on the surfaces of the membrane filaments and flows to the membrane boxes at the two ends, and sludge is blocked at the outer parts of the membrane filaments; the diaphragm capsule is a clear water collecting device, is generally a plastic shell made of ABS materials, and two ends of the diaphragm filament are poured in the diaphragm capsule by adopting epoxy resin glue to play a role in isolating clear water and sewage. On the current membrane module design, higher water yield can be realized only by increasing the length and filling rate of membrane filaments, improving the running flux, increasing the number of membrane modules/modules and the like; however, the too long membrane filaments have the problems of too large membrane filament amplitude, blockage of an aeration channel and the like, the higher membrane filament filling rate can reduce the glue sealing strength of the membrane assembly, the inner part of the membrane filament bundle is less in gas scouring effect, and the two modes can cause the membrane assembly to generate serious sludge accumulation and even damage; increasing the number of membrane modules/assemblies can increase the water yield under the condition of ensuring stable operation of MBR, but this way not only increases investment and maintenance cost, but also needs larger floor area, and is not applicable to the insufficient floor area of the wastewater treatment tank, especially to the limited membrane tank construction environment which is completed by civil engineering.

The group device frame is generally made of stainless steel sectional materials and mainly comprises a plurality of cross beams, upright posts and the like, a plurality of membrane modules are arranged in parallel and fixed on a supporting frame, and the output of product water is completed through a water collecting system formed by water collecting branch pipes, a water collecting main pipe and the like. In the current MBR water treatment market, a common hollow fiber curtain type membrane assembly is provided with support rods and water collection fittings at two sides, wherein the support rods are made of stainless steel mostly and used for supporting and fixing the membrane assembly, and the water collection fittings are made of ABS mostly and used for guiding product water filtered by the membrane to a water collection device; therefore, the assembling device frame also needs to be correspondingly designed with fixing parts such as supporting rods, water collecting fittings and the like to ensure the quality of product water, which undoubtedly increases the manufacturing cost of the assembling device frame; meanwhile, the complexity of the frame structure of the membrane assembly device also increases the difficulty in disassembling and assembling the membrane assembly. In addition, the existence of the supporting rods leads to that the MBR membrane module is difficult to realize in-situ water washing due to small space, and on the other hand, in the long-term operation process of the MBR, the chemical cleaning liquid of the membrane module can corrode the supporting rods, and the quality of the product water can be easily unqualified, so that the replacement and maintenance cost of the membrane module is increased.

The aeration system is generally composed of an air inlet pipe, an air distribution pipe and aeration branch pipes, is mainly used for relieving the membrane pollution phenomenon caused by the existence of suspended pollutants such as particles, colloidal particles or solute macromolecules in sewage, and removes the pollutants adsorbed on the surface of membrane filaments by forming strong gas-liquid two-phase flow on the surface of the membrane filaments, thereby avoiding the situations of membrane component flux reduction, effluent quality reduction and the like and ensuring the stable operation of MBR. Firstly, continuous gas aeration is adopted to carry out cross flow scouring on the surface of the membrane filaments, but the mode not only increases the operation energy consumption and causes energy waste, but also easily causes the problem of hair winding at the root of the membrane filaments and shortens the service life of the membrane; in addition, the mixed liquid is dissolved with too high dissolved oxygen through larger aeration, so that the removal effect of the total nitrogen of the system is poor, and the quality of water produced by the MBR is influenced. The pulse aeration of the perforated pipe is realized by switching a pipeline or a valve, the airflow rises in a bubble shape to drive the water flow to flow upwards to flush the surface of the membrane yarn, and the aeration mode saves energy consumption and relieves membrane pollution; however, the complexity of pipeline design and equipment investment cost are increased by the method, frequent opening and closing of the valve causes more abrasion and faults, the maintenance amount is large, once the valve is damaged, the pulse aeration cannot be normally carried out, the sludge accumulation on the surface of the membrane wires is easily caused, and the normal operation of the MBR is influenced. In addition, biological films are easily attached to the inner part and the position of the hole of the perforated pipe, and particularly, when the aeration is stopped, the bottom mud easily enters the aeration pipe through the hole under the action of hydrostatic pressure, so that the blockage phenomenon of the hole and the pipeline is caused, and the aeration effect is influenced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an energy-efficient formula MBR device to overcome prior art's defect.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The utility model provides a following scheme:

an energy efficient MBR apparatus, comprising: a water inlet system, a membrane module system, a water outlet system, an aeration system, a backwashing system and a membrane pool;

the water inlet system enables the sewage to be treated to enter the membrane tank;

the membrane module system is arranged in the membrane pool and used for purifying the sewage to be treated entering the membrane pool;

the water outlet system is connected with the membrane module system and is used for discharging purified produced water out of the membrane pool;

the aeration system is connected with the membrane module system and provides air required by aeration for the membrane module system;

the backwashing system is connected with the membrane module system and used for carrying out on-line chemical backwashing on the membrane module system so as to recover the running state of the membrane module system;

wherein, the membrane module system includes: after sewage to be treated enters the membrane tank, the sewage is purified through the solid-liquid separation effect of membrane components of the double-layer curtain type membrane module, produced water is collected and discharged out of the membrane tank through a water outlet system, sludge is intercepted in the membrane tank, the aeration component is located at the bottom of a frame of the double-layer curtain type membrane module, and pulse large bubble gas output through the aeration component is used for slowing down the membrane component pollution rate of the double-layer curtain type membrane module.

Preferably, the water intake system comprises: the sewage treatment device comprises a water inlet pump, a valve i and a water inlet pipe, wherein one end of the water inlet pipe is connected with the water inlet pump, the other end of the water inlet pipe is connected with a membrane pool, the valve i is arranged on the water inlet pipe, and sewage to be treated sequentially passes through the water inlet pump, the valve i and the water inlet pipe and enters the membrane pool;

the water outlet system comprises: the membrane group device comprises a water production pipe, a valve iii and a water production pump, wherein one end of the water production pipe is connected with the water production pump, the other end of the water production pipe is connected with the membrane group system, the valve iii is arranged on the water production pipe, the water produced after being treated by the membrane group device system is discharged out of a membrane pool through the water production pipe, the valve iii and the water production pump in sequence, and is discharged or enters a next-stage water treatment system according to the water quality requirement;

the aeration system comprises: the membrane module system comprises a fan, a valve iv and an aeration pipe, wherein one end of the aeration pipe is connected with the fan, the other end of the aeration pipe is connected with the membrane module system, the valve iv is arranged on the aeration pipe, and air sequentially passes through the fan, the valve iv and the aeration pipe to enter an aeration component so as to provide air required by aeration for the membrane module system;

the backwash system includes: the backwashing device comprises a backwashing pump, a valve ii and a backwashing pipe, wherein one end of the backwashing pipe is connected with a membrane module system, the other end of the backwashing pipe is connected with the backwashing pump, the valve ii is arranged on the backwashing pipe, backwashing liquid medicine sequentially passes through the backwashing pump, the valve ii and the backwashing pipe to enter the double-layer curtain type membrane module device, and online chemical backwashing is carried out on the double-layer curtain type membrane module device so as to recover the running state of the double-layer curtain type membrane module device.

Preferably, the double curtain film assembly comprises: the device comprises a device frame, a water collecting device, a membrane component and an aeration device;

the combiner frame is a main body supporting structure of the double-layer curtain type membrane combiner and is divided into an upper combiner frame and a lower combiner frame; the double-layer combiner structure built by the stainless steel framework comprises a hanger, a plurality of stand columns and a plurality of cross beams; the hanger is arranged at the top of the combiner frame and used for hoisting the double-layer curtain type membrane combiner; the upright posts and the cross beams are mutually vertical and are made of stainless steel square tubes, each layer is connected by welding to form a space for placing the membrane module, and the upper layer and the lower layer are connected and fixed by bolts; the bottom of the assembly frame is provided with a foundation fixing bolt, so that the displacement and vibration of the double-layer curtain type membrane assembly device during operation in a membrane pool are avoided;

the water collecting device comprises: the water collecting device comprises water collecting connectors i, 4 water collecting stand columns, a water collecting connector ii, a water producing flange i and a water producing flange ii, wherein the upper layer group device frame and the lower layer group device frame are respectively provided with 2 water collecting stand columns, the water collecting connector i and the water collecting connector ii are fixed on cross beams in the middle of the top and the middle of the bottom of the upper layer group device frame and the lower layer group device frame in a welding mode, and the cross beams welded with the water collecting connector i and the water collecting connector ii are water collecting cross beams; in the upper layer group device frame, one end of a water collecting upright post is connected with a water collecting beam at the bottom of the upper layer group device frame, the other end of the water collecting upright post is connected with a water collecting beam at the top of the upper layer group device frame, produced water in the water collecting beam at the bottom is guided into the water collecting beam at the top under the action of suction force, and a water producing flange i is welded on the water collecting beam at the top of the upper layer group device frame; in the lower layer group device frame, one end of a water collecting upright post is connected with a water collecting beam at the bottom of the lower layer group device frame, the other end of the water collecting upright post is connected with a water collecting beam at the top of the lower layer group device frame, the water collecting beam is used for guiding the produced water in the water collecting beam at the bottom into the water collecting beam at the top, and a water producing flange ii is welded on the water collecting beam at the top of the lower layer group device frame; the water producing flange i and the water producing flange ii are respectively used for outputting the collected water produced by the upper layer and the lower layer to the double-layer curtain type membrane group device;

the membrane module adopts a plurality of hollow fiber curtain type rodless membrane modules which are arranged in parallel in a double-layer module frame and are vertical to the horizontal plane; in the upper and lower layer group devices, the rodless membrane module adopts a mode that the upper and lower same sides of a membrane box simultaneously collect water, wherein the water producing sides at the upper and lower ends of the rodless membrane module are respectively and fixedly connected with a water collecting interface i and a water collecting interface ii, and the water non-producing sides are respectively fixed on corresponding cross beams in a bolt connection mode through pipe clamps;

the aeration device is arranged at the bottom of the frame of the group device and comprises: an aeration piece and an aeration flange; wherein, aeration spare is connected to aeration flange one end, and the aeration pipe of aeration system is connected to the other end for carry the gas that the fan provided to aeration spare.

By the foregoing the embodiment of the utility model provides a technical scheme can see out, the embodiment of the utility model provides a high-efficient energy-saving MBR device adopts novel double-deck curtain formula membrane group ware and rodless membrane module, realizes the device's high efficiency, low consumption, anti-soil, steady operation. Has the following beneficial effects:

(1) the novel double-layer curtain type membrane assembly device is adopted, namely a double-layer assembly device structure is constructed by a high-strength stainless steel framework, so that potential safety hazards are eliminated in the modes of welding, reinforcing and the like, corrosion caused by long-term immersion in sewage is avoided, and the service life is long; the membrane modules are arranged in the double-layer set frame in parallel, so that the filling density of the membrane modules is increased, the floor area of the membrane modules of the wastewater treatment tank is saved by more than 50%, the sewage treatment efficiency is improved, the sewage treatment cost is reduced, and the membrane module is particularly suitable for occasions with high water treatment capacity, such as new construction, standard improvement and reconstruction, of a large-scale municipal sewage treatment plant; the aeration device is arranged at the bottom of the double-layer reactor frame, so that the air consumption is saved by more than 30%, the aeration is fully utilized, and the energy is saved and the consumption is reduced.

(2) The rodless membrane module is adopted, a water production pipeline runs through a membrane module frame structure, namely a water production port of each membrane is directly connected to a frame cross beam through a specific water collection interface, and a water production flange is arranged at the upper end of the frame cross beam, so that a short-flow water collection mode is formed, on one hand, the pumping energy consumption of filtered water can be reduced, the water production structure is optimized, the water distribution uniformity is improved, the high-flux operation of the membrane module is realized, on the other hand, the online membrane cleaning is facilitated, the injection pressure tolerance capability of cleaning liquid medicine is improved, and the online cleaning efficiency of the membrane module is improved; the water production pipeline does not need to be independently arranged, the design structure of the membrane frame is simplified, the welding quantity of the stainless steel membrane frame is reduced, the assembly precision of a product is improved, the manufacturing cost of the membrane module device is reduced, the on-site installation and the operation maintenance are convenient, and the economic benefit is good.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of an efficient and energy-saving MBR apparatus provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a double-layer curtain type membrane module provided by an embodiment of the present invention;

fig. 3 is a schematic view of a sectional structure of the channel type pulse large aeration member provided by the embodiment of the utility model, which is cut along the length direction.

Reference numerals:

1. the device comprises a water inlet pump, 2, a valve i, 3, a water inlet pipe, 4, a backwashing pipe, 5, a valve ii, 6, a backwashing pump, 7, a water production pipe, 8, a double-layer curtain type membrane group device, 9, a water production pump, 10, a valve iii, 11, a membrane pool, 12, an aeration piece, 13, an aeration pipe, 14, a fan, 15, a valve iv, 16, a hanging bracket, 17, a water production flange i, 18, a column, 19, a rodless membrane component, 20, a cross beam, 21, a water production flange ii, 22, an aeration flange, 23, a pipe clamp, 24, a water collection interface i, 25, a water collection column, 26, a water collection interface ii, 27, a gas collection cup, 28, a gas release hole, 29, an aeration cup, 30, an aeration cavity, 31, a gas release device, 32, a gas inlet, 33, a gas distribution hole, 34, an opening, 35, a gas distribution groove, 36 and a fixed end.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the convenience of understanding the embodiments of the present invention, the following description will be given by way of example only with reference to the accompanying drawings, and the embodiments are not limited thereto.

The embodiment of the utility model provides an energy-efficient formula MBR device, as shown in FIG. 1, it includes: a water inlet system, a membrane module system, a water outlet system, an aeration system and a backwashing system; the water inlet system comprises a water inlet pump 1, a valve i2 and a water inlet pipe 3, and sewage to be treated sequentially passes through the water inlet pump 1, the valve i2 and the water inlet pipe 3 and enters the membrane tank 11; the membrane module system is arranged in the membrane pool 11 and comprises a double-layer curtain type membrane module 8 and an aeration component 12, after sewage to be treated enters the membrane pool 11, the sewage is purified through the solid-liquid separation effect of the membrane module of the double-layer curtain type membrane module 8, produced water is collected and discharged out of the membrane pool 11 through a water outlet system, sludge is intercepted in the membrane pool 11, the aeration component 12 is positioned at the bottom of the frame of the double-layer curtain type membrane module 8, and the pulse large bubble gas output of the aeration component is used for slowing down the membrane module pollution rate of the double-layer curtain type membrane module 8; the water outlet system comprises a water production pipe 7, a valve iii10 and a water production pump 9, the produced water treated by the membrane module system is discharged out of the membrane pool through the water production pipe 7, the valve iii10 and the water production pump 9 in sequence, and the produced water can be discharged or enter a next-stage water treatment system according to the water quality requirement; the aeration system comprises a fan 14, a valve iv15 and an aeration pipe 13, and air passes through the fan 14, the valve iv15 and the aeration pipe 13 to the aeration component 12 in sequence to provide air required by aeration for the membrane module system; the backwashing system comprises a backwashing pump 6, a valve ii5 and a backwashing pipe 4, and backwashing liquid medicine sequentially passes through the backwashing pump 6, the valve ii5 and the backwashing pipe 4 to enter the double-layer curtain type membrane group device 8 so as to relieve the membrane component pollution condition, namely when the running condition of the MBR device is obviously reduced or reaches a set state, the double-layer curtain type membrane group device 8 needs to be subjected to online chemical backwashing so as to recover the better running state.

As shown in fig. 2, the double curtain membrane module 8 includes a module frame, a membrane module, a water collecting device and an aeration device. The assembly frame is a main body supporting structure of the double-layer curtain type membrane assembly device, is an upper layer assembly frame and a lower layer assembly frame, is a double-layer assembly structure built by a high-strength stainless steel frame, eliminates potential safety hazards in a welding, reinforcing and other modes on one hand, avoids corrosion caused by long-term immersion in sewage on the other hand, and is long in service life, and mainly comprises a hanging bracket 16, a plurality of stand columns 18 and a plurality of cross beams 20; the hanger 16 is arranged at the top of the combiner frame and used for hoisting the double-layer curtain type membrane combiner 8, so that the double-layer curtain type membrane combiner 8 can be maintained off line conveniently; the upright posts 18 and the cross beams 20 are vertical to each other and are made of a plurality of 40 multiplied by 40mm 304 stainless steel square tubes, the layers are connected by welding to form a space for placing a membrane module, and the upper layer and the lower layer are connected and fixed by bolts; the bottom of the assembly frame is provided with anchor fixing bolts, so that the double-layer curtain type membrane assembly device 8 is prevented from shifting and vibrating when running in a membrane pool.

The water collecting device comprises water collecting connectors i24, 4 water collecting upright columns 25, a water collecting connector ii26, a water producing flange i17 and a water producing flange ii21, wherein the upper layer group device frame and the lower layer group device frame are respectively provided with 2 water collecting upright columns 25, the water collecting connectors i24 and the water collecting connectors ii26 are fixed on cross beams 20 in the middle of the top and the middle of the bottom of the upper layer group device frame and the lower layer group device frame in a welding mode, and the cross beams 20 welded with the water collecting connectors i24 and the water collecting connectors ii26 are water collecting cross beams. The water collecting interface i24 and the water collecting interface ii26 are connected with the water production end of the rodless membrane module 19 and are used for collecting water treated by the rodless membrane module 19. In each layer set frame, one end of the water collecting upright post 25 is connected with the bottom water collecting beam 20, and the other end is connected with the top water collecting beam 20, and is used for guiding the produced water in the bottom water collecting beam into the top water collecting beam. The water production flange i17 is welded on the water collection beam 20 at the top of the upper layer formation device frame, the water production flange ii20 is welded on the water collection beam 20 at the top of the lower layer formation device frame, and the water production flange i17 and the water production flange ii are respectively used for outputting the collected water from the upper layer and the lower layer to the double-layer curtain type membrane assembly 8. The short-flow water collection mode formed in the process can reduce the pumping energy consumption of filtered water, improve the water distribution uniformity and realize the high-flux operation of the rodless membrane module 19 on one hand, and is favorable for online membrane cleaning on the other hand, the injection pressure tolerance of backwashing liquid medicine is improved, and the online cleaning efficiency of the rodless membrane module 19 is improved; the water collecting pipeline does not need to be independently arranged, the design structure of the membrane group device frame is simplified, the manufacturing cost of the membrane group device is reduced, the membrane group device is convenient to install on site and operate and maintain, and good economic benefits are achieved.

The membrane module employs a plurality of hollow fiber curtain rodless membrane modules 19 arranged in parallel within a dual layer module frame and perpendicular to the horizontal plane. By arranging the double-layer membrane assembly, the filling density of the membrane assembly device is increased, more than 50% of the floor area of the membrane assembly device in the wastewater treatment tank is saved, the wastewater treatment efficiency is improved, the wastewater treatment cost is reduced, and the membrane assembly device is particularly suitable for occasions with high treatment water quantity, such as new construction, standard improvement and reconstruction, of a large-scale municipal wastewater treatment plant; in the upper and lower layer group device, the rodless membrane module 19 adopts a membrane box upper and lower same side simultaneous water collection mode, wherein, the water production sides at the upper and lower ends of the rodless membrane module 19 are respectively and fixedly connected with a water collection interface i24 and a water collection interface ii26 on a water production cross beam 20, the water non-production sides are respectively fixed on the corresponding cross beams 20 through pipe clamps 23 in a bolt connection mode, one end of a water collection upright post 25 is connected with the water collection cross beam 20 at the bottom, the other end is connected with the water collection cross beam 20 at the top, under the action of suction force, the water produced in the water collection cross beam at the bottom is guided into the water collection cross beam at the top, and then the produced water is output to the double-layer curtain type membrane group device 8 through a water production flange i 17; correspondingly, the lower-layer combiner outputs the lower-layer produced water to the double-layer curtain membrane combiner 8 through the corresponding water collecting interface i24, the water collecting upright post 25, the water collecting interface ii26 and the water producing flange ii 21; the height of each layer set of device frame can be changed according to the effective length of the membrane filament of the rodless membrane assembly 19, and the membrane filament shaking amount of the rodless membrane assembly 19 is ensured to be 8-12 mm;

the aeration device is arranged at the bottom of the frame of the assembly and comprises an aeration piece 12 and an aeration flange 22; the aeration part 12 adopts a novel structural form of an aeration tank body and a gas collection space to form 'gas distribution, gas collection and gas release' automatic circulation type pulse large bubble aeration, so that the scrubbing strength of gas on the surface of the rodless membrane component 19 is improved, the operation gas-water ratio of the double-layer curtain type membrane component 8 is reduced to about 6, the membrane pollution rate is effectively reduced, the aeration energy consumption is reduced, and the operation cost is saved; the structure of the aeration part 12 and the design of an aeration pipeline are simple, the defects of short service life, frequent replacement and the like caused by frequent starting and stopping of an electromagnetic valve in the conventional pulse aeration are avoided, the equipment investment and the operation and maintenance cost are saved, meanwhile, the large bubble specific surface area formed by the aeration part 12 is small, the oxygen filling efficiency in a water body can be reduced, and the phenomena that the water quality of produced water does not reach the standard and the like caused by overhigh oxygen content in the water body are avoided; in addition, the special opening in the structure of the aeration part 12 can be used as an outflow port for pollutants such as sludge and the like, so that the abnormal occurrence of pulse aeration caused by blockage of a gas collection space in the aeration part 12 can be avoided, and the special opening can be used as a water flow outlet so as to avoid the conditions that the aeration part 12 cannot be used and the like caused by icing of residual water during a pressing test in winter; one end of the aeration flange 22 is connected with the aeration part 12, and the other end is connected with the aeration pipe 13 of the aeration system, and the aeration pipe is used for conveying the gas provided by the fan to the aeration part 12, so as to complete the pulse large aeration of the rodless membrane component 19 and relieve the membrane pollution rate.

As shown in fig. 3, the aeration member 12 for tank type pulse large aeration mainly comprises an air distribution tank 35, an aerator and an air release device 31; wherein, the air distribution groove 35 is a rectangular groove body with a downward opening, is arranged at the bottom of the aeration piece 12, and is integrally in an inverted U shape. The two ends of the U-shaped groove in the width direction are open, one end is a fixed end 36 connected with the aerator, and the other end is an air inlet end provided with an air inlet 32; both sides of the U-shaped groove in the length direction are provided with air distribution holes 33 communicated with the aerator; the air conveyed by the aeration pipe 13 enters the air distribution groove 35 through the air inlet 32 and is discharged into the aerator through the air distribution hole 33; the lower part of the air distribution groove 35 is open, so that the blocking phenomenon possibly caused by the aeration of the perforated pipe is avoided, and the air distribution effect of the air distribution holes 33 is good;

the aerator is arranged between the air distribution groove 35 and the air release device 31 and comprises an aeration cavity 30, an air collection cup 27 and an aeration cup 29; wherein, the aeration cavity 30 is a rectangular hollow cavity, the gas collecting cup 27 and the aeration cup 29 are arranged inside the aeration cavity 30, the top of the gas collecting cup 27 is open, the bottom is arc-shaped and is provided with an opening 34 at the bottom, the top opening of the gas collecting cup is opposite to the top of the aeration cavity 30 and has a preset distance with the top of the aeration cavity 30 so as to collect gas; the top and the bottom of the aeration cup 29 are both open, the aeration cup is vertically inserted into the air collecting cup 27, the bottom of the aeration cup is higher than the bottom of the air collecting cup to form an opening, and the top opening of the aeration cup 29 penetrates through the top of the aerator to realize aeration; the gas enters the aeration cavity 30 through the gas distribution holes 33, when the gas is filled in the effective gas containing space in the aeration cavity 30, the liquid level in the aeration cavity 30 gradually drops, when the liquid level drops to the opening position at the bottom of the aeration cup 29, the gas in the aeration cavity 33 is released from the top of the aeration cup 29 instantly in the form of large bubbles (the strength is nearly 10 times of that of conventional aeration), and meanwhile, the water flow is poured back into the gas collection cup 27 again; because the aeration process is still continued, the gas can press the liquid level in the aeration cavity 33 again until reaching the opening position at the bottom of the aeration cup 29, and then instantaneous large aeration is realized; the automatic circulation type pulse large-bubble aeration of gas distribution, gas collection and gas release formed in the process improves the scrubbing strength of gas on the surface of the rodless membrane component 19, reduces the operation gas-water ratio of the double-layer curtain type membrane component 8 to about 6, effectively slows down the membrane pollution rate, reduces the aeration energy consumption and saves the operation cost; the structure of the aeration part 12 and the design of an aeration pipeline are simple, the defects of short service life, frequent replacement and the like caused by frequent starting and stopping of an electromagnetic valve in the conventional pulse aeration are avoided, the equipment investment and the operation and maintenance cost are saved, meanwhile, the large bubble specific surface area formed by the aeration part 12 is small, the oxygen filling efficiency in a water body can be reduced, and the phenomena that the water quality of produced water does not reach the standard and the like caused by overhigh oxygen content in the water body are avoided; in addition, the opening 34 at the bottom of the air collecting cup 27 can be used as an outlet of pollutants such as sludge on the one hand to avoid abnormal occurrence of pulse aeration caused by blockage of the air collecting cup 27 and as a water outlet on the other hand to avoid the condition that the aeration member 12 cannot be used due to icing of residual water during a pressure test in winter and the like without influencing the aeration effect of the aeration member 12.

The air release device 31 is arranged at the top of the aeration part 12, and the surface is provided with air release holes 28 for air distribution of pulse large aeration so as to realize uniform scrubbing of the surface of the rodless membrane component 19 and effectively relieve membrane pollution.

To sum up, the embodiment of the utility model provides an energy-efficient formula MBR device, including novel double-deck curtain formula membrane group ware, rodless membrane module and the big aeration of slot type pulse. The novel double-layer curtain type membrane module is a double-layer module structure constructed by a high-strength stainless steel framework, and is high in strength, corrosion-resistant and long in service life. The rodless membrane modules are arranged in parallel in the double-layer module frame, so that the filling density of the membrane modules is increased, the floor area of the membrane modules in the wastewater treatment tank is saved by more than 50%, the wastewater treatment efficiency is improved, and the wastewater treatment cost is reduced; the water production pipeline is in a frame structure of the membrane group device, the pumping energy consumption of filtered water is reduced by a short-flow water collection mode, the water distribution uniformity is improved, and online membrane cleaning is facilitated; the membrane frame design structure is simplified, the welding quantity of the stainless steel membrane frame is reduced, the manufacturing cost of the membrane module device is reduced, the on-site installation and the operation maintenance are convenient, and the membrane frame has good economic benefits. The membrane component is characterized in that groove type pulse large aeration is arranged at the bottom of the double-layer component, an aeration component is designed by utilizing a novel structure of an aeration groove body and a gas collection space, and the scrubbing strength of gas on the surface of the membrane component is improved by 'gas distribution, gas collection and gas release' automatic circulation type pulse large bubble aeration, so that the operation gas-water ratio of the membrane component is reduced to about 6, the membrane pollution rate is effectively slowed down, the aeration energy consumption is reduced, and the operation cost is saved; the aeration structure and the aeration pipeline are simple in design, the defects of short service life, frequent replacement and the like caused by frequent starting and stopping of the electromagnetic valve in the conventional pulse aeration are avoided, the equipment investment and the operation and maintenance cost are saved, meanwhile, the large bubble specific surface area formed by aeration is small, the oxygen charging efficiency in the water body can be reduced, and the phenomena that the water quality of produced water does not reach the standard and the like caused by overhigh oxygen content in the water body are avoided; in addition, the special trompil setting in the aeration structure can be regarded as the egress opening of pollutants such as mud on the one hand, avoids the improper emergence condition of pulse aeration that the interior gas collection space of aeration spare blockked up and lead to, and on the other hand can regard as the rivers export, avoids the circumstances such as aeration spare unable normal use that residual water freezes and causes when suppressing the test winter.

Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.

Those of ordinary skill in the art will understand that: the components in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be correspondingly changed in one or more devices different from the embodiments. The components of the above embodiments may be combined into one component, or may be further divided into a plurality of sub-components.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (3)

1. An energy-efficient formula MBR device, its characterized in that includes: a water inlet system, a membrane group device system, a water outlet system, an aeration system, a backwashing system and a membrane pool (11);

the water inlet system enables the sewage to be treated to enter the membrane tank (11);

the membrane module system is arranged in the membrane tank (11) and is used for purifying the sewage to be treated entering the membrane tank (11);

the water outlet system is connected with the membrane module system and is used for discharging purified produced water out of the membrane pool (11);

the aeration system is connected with the membrane module system and provides air required by aeration for the membrane module system;

the backwashing system is connected with the membrane module system and used for carrying out on-line chemical backwashing on the membrane module system so as to recover the running state of the membrane module system;

wherein, the membrane module system includes: the sewage treatment device comprises a double-layer curtain type membrane group device (8) and an aeration component (12), after sewage to be treated enters a membrane pool (11), the sewage is purified through the solid-liquid separation effect of a membrane component of the double-layer curtain type membrane group device (8), produced water is collected through a water outlet system and discharged out of the membrane pool (11), sludge is intercepted in the membrane pool (11), the aeration component (12) is located at the bottom of a frame of the double-layer curtain type membrane group device (8), and pulse large bubble gas output through the aeration component is used for slowing down the membrane component pollution rate of the double-layer curtain type membrane group device (8).

2. The apparatus of claim 1, wherein the water intake system comprises: the sewage treatment device comprises a water inlet pump (1), a valve i (2) and a water inlet pipe (3), wherein one end of the water inlet pipe (3) is connected with the water inlet pump (1), the other end of the water inlet pipe is connected with a membrane pool (11), the valve i (2) is installed on the water inlet pipe (3), and sewage to be treated sequentially passes through the water inlet pump (1), the valve i (2) and the water inlet pipe (3) and enters the membrane pool (11);

the water outlet system comprises: the membrane bioreactor comprises a water production pipe (7), a valve iii (10) and a water production pump (9), wherein one end of the water production pipe (7) is connected with the water production pump (9), the other end of the water production pipe is connected with a membrane module system, the valve iii (10) is installed on the water production pipe (7), and produced water treated by the membrane module system is discharged out of a membrane pool (11) through the water production pipe (7), the valve iii (10) and the water production pump (9) in sequence and is discharged or enters a next-stage water treatment system according to the water quality requirement;

the aeration system comprises: the membrane aeration device comprises a fan (14), a valve iv (15) and an aeration pipe (13), wherein one end of the aeration pipe (13) is connected with the fan (14), the other end of the aeration pipe is connected with a membrane module system, the valve iv (15) is installed on the aeration pipe (13), air sequentially passes through the fan (14), the valve iv (15) and the aeration pipe (13) and enters an aeration component (12) to provide air required by aeration for the membrane module system;

the backwash system includes: the membrane backwashing device comprises a backwashing pump (6), a valve ii (5) and a backwashing pipe (4), wherein one end of the backwashing pipe (4) is connected with a membrane module system, the other end of the backwashing pipe is connected with the backwashing pump (6), the valve ii (5) is installed on the backwashing pipe (4), backwashing liquid medicine sequentially passes through the backwashing pump (6), the valve ii (5) and the backwashing pipe (4) to enter a double-layer curtain type membrane module device (8), and online chemical backwashing is carried out on the double-layer curtain type membrane module device (8) so as to recover the running state of the double-layer curtain type membrane module device.

3. The device according to claim 1, characterized in that the double curtain film combiner (8) comprises: the device comprises a device frame, a water collecting device, a membrane component and an aeration device;

the combiner frame is a main body supporting structure of a double-layer curtain type membrane combiner (8) and is divided into an upper combiner frame and a lower combiner frame; the double-layer combiner structure built by the stainless steel framework comprises a hanger (16), a plurality of upright posts (18) and a plurality of cross beams (20); the hanger (16) is arranged at the top of the combiner frame and used for hoisting the double-layer curtain type membrane combiner (8); the upright columns (18) and the cross beams (20) are perpendicular to each other and are made of stainless steel square tubes, each layer is connected through welding to form a space for placing a membrane assembly, and the upper layer and the lower layer are connected and fixed through bolts; the bottom of the assembly frame is provided with a foundation fixing bolt, so that the double-layer curtain type membrane assembly device (8) is prevented from shifting and vibrating when running in a membrane pool;

the water collecting device comprises: the water collecting device comprises a water collecting interface i (24), 4 water collecting stand columns (25), a water collecting interface ii (26), a water producing flange i (17) and a water producing flange ii (21), wherein the upper layer group device frame and the lower layer group device frame are respectively provided with 2 water collecting stand columns (25), the water collecting interface i (24) and the water collecting interface ii (26) are fixed on cross beams (20) in the middle of the top and the middle of the bottom of the upper layer group device frame and the lower layer group device frame in a welding mode, and the cross beams (20) welded with the water collecting interface i (24) and the water collecting interface ii (26) are water collecting cross beams; in the upper layer group device frame, one end of a water collecting upright post (25) is connected with a water collecting beam at the bottom of the upper layer group device frame, the other end of the water collecting upright post is connected with a water collecting beam at the top of the upper layer group device frame, water produced in the water collecting beam at the bottom is guided into the water collecting beam at the top under the action of suction force, and a water producing flange i (17) is welded on the water collecting beam at the top of the upper layer group device frame; in the lower layer group device frame, one end of a water collecting upright post (25) is connected with a bottom water collecting beam of the lower layer group device frame, the other end of the water collecting upright post is connected with a top water collecting beam of the lower layer group device frame, the water collecting upright post is used for guiding produced water in the bottom water collecting beam into the top water collecting beam, and a water producing flange ii (21) is welded on the top water collecting beam of the lower layer group device frame; the water producing flange i (17) and the water producing flange ii (21) are respectively used for outputting the collected water produced by the upper layer and the lower layer to the double-layer curtain type membrane group device (8);

the membrane module adopts a plurality of hollow fiber curtain type rodless membrane modules (19) which are arranged in parallel in a double-layer module frame and are vertical to the horizontal plane; in the upper and lower layer group devices, a rodless membrane component (19) adopts a membrane box upper and lower same side simultaneous water collection mode, wherein the water producing sides at the upper and lower ends of the rodless membrane component (19) are respectively and fixedly connected to a water collection interface i (24) and a water collection interface ii (26), and the water non-producing sides are respectively fixed on corresponding cross beams (20) in a bolt connection mode through pipe clamps (23);

the aeration device is arranged at the bottom of the frame of the group device and comprises: an aeration piece (12) and an aeration flange (22); wherein, aeration spare (12) is connected to aeration flange (22) one end, and aeration pipe (13) of aeration system are connected to the other end for carry the gas that the fan provided to aeration spare (12).

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