CN215828435U

CN215828435U - Novel membrane system of offshore platform domestic sewage treatment device

Info

Publication number: CN215828435U
Application number: CN202122349803.6U
Authority: CN
Inventors: 石俊飞; 国健; 张子臣; 于文轩; 孙立刚; 杜泽宇; 宋斌
Original assignee: Safety and Environmental Protection Branch of CNOOC Energy Technology and Services Ltd; CNOOC Energy Conservation and Environmental Protection Service Co Ltd
Current assignee: Safety and Environmental Protection Branch of CNOOC Energy Technology and Services Ltd; CNOOC Energy Conservation and Environmental Protection Service Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-02-15
Anticipated expiration: 2031-09-27

Abstract

The utility model discloses a novel membrane system of a domestic sewage treatment device of an offshore platform, which comprises a membrane component, a water production pump and a backwashing system; the membrane module comprises a membrane stack frame, a plurality of membranes are arranged on the membrane stack frame in parallel, and a water collecting pipeline and an aeration pipeline are arranged on the membrane stack frame; the water collecting pipeline comprises a water collecting main pipe, and the water collecting main pipe is connected with each membrane through a plurality of water collecting branch pipes; the aeration pipeline comprises an aeration main pipe and a plurality of groups of aeration branch pipes, and a group of aeration branch pipes are arranged between every two adjacent membranes; the water inlet pipeline of the water producing pump is connected with the water collecting main pipe of the membrane component, the water outlet pipeline is divided into two branches, one branch is connected with the water outlet through the flow limiting element, and the other branch is connected with the backwashing system. The system is simple and convenient in mounting and dismounting process and easy to operate and maintain; the problem of pollution and blockage of the traditional membrane component system is solved through optimization design, the service life of the membrane is prolonged, and meanwhile, the sewage treatment system is more stable.

Description

Novel membrane system of offshore platform domestic sewage treatment device

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to a novel membrane system of an offshore platform domestic sewage treatment device.

Background

The MBR membrane is used as a key unit for solid-liquid separation in the sewage treatment process, and the performance of the MBR membrane directly influences the stability of the water treatment amount of the system. After the conventional membrane system is used for a period of time, the problems of serious fouling and blockage of the membrane component, rapid flux reduction and the like caused by attachment of colloids, suspended matters and activated sludge on the surface of membrane filaments easily occur.

Therefore, the existing design needs to be modified and optimized, the problem of membrane component fouling is solved, the service life of the membrane is prolonged, and meanwhile, the sewage treatment system is more stable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel membrane system of a domestic sewage treatment device of an offshore platform, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

a novel membrane system of a domestic sewage treatment device of an offshore platform comprises a membrane component, a water production pump and a backwashing system; the membrane module comprises a membrane stack frame, a plurality of membranes are arranged on the membrane stack frame in parallel, and a water collecting pipeline and an aeration pipeline are arranged on the membrane stack frame; the water collecting pipeline comprises a water collecting main pipe, and the water collecting main pipe is connected with each membrane through a plurality of water collecting branch pipes; the aeration pipeline comprises an aeration main pipe and a plurality of groups of aeration branch pipes, and a group of aeration branch pipes are arranged between every two adjacent membranes; the water inlet pipeline of the water producing pump is connected with the water collecting main pipe of the membrane component, the water outlet pipeline is divided into two branches, one branch is connected with the water outlet through the flow limiting element, and the other branch is connected with the backwashing system.

Furthermore, the diaphragm is provided with two water collecting tanks which are arranged in parallel, the middle of each water collecting tank is connected through a plurality of membrane wires, the end parts of the two water collecting tanks are connected through two supporting pipes, the water collecting tanks and the supporting pipes form a rectangular frame structure, and one water collecting tank is provided with a water outlet.

Further, the membrane stack frame comprises a main support, and a plurality of clamping grooves for fixing the membranes are formed in the main support; the edge of the top of the main support is provided with a corner support, and the top of the main support is provided with a fixed pressing strip.

Further, the aeration branch pipes comprise a vertical branch pipe and a horizontal branch pipe; a plurality of aeration holes with opening directions inclined upwards by 45 degrees are arranged along the extension direction of the horizontal branch pipe; three water drainage holes with vertically downward opening directions are uniformly distributed on the horizontal branch pipe.

Furthermore, the main body of the water collecting branch pipe is a U-shaped connecting pipe, and two sealing rings are nested outside the vertical parts at the two ends of the water collecting branch pipe.

Furthermore, a plurality of water inlet holes are uniformly distributed on the water collecting main pipe, one end of the water collecting branch pipe is inserted into one water inlet hole, and one end of the water collecting branch pipe is inserted into the water outlet of one membrane.

Further, the length of the membrane wire is larger than that of the support tube.

Furthermore, the backwashing system comprises a backwashing tank, a breather valve is arranged at the middle upper part of the backwashing tank, and a one-way valve, a flow limiting element, a proportional pump and an electromagnetic valve are arranged in parallel on a pipeline between the backwashing tank and the water producing pump; wherein the installation direction of the one-way valve is from the backwash tank to the water production pump.

Furthermore, the water producing pump is continuously operated in a circulation intermittent mode.

The utility model has the following characteristics:

(1) and the MBR membrane filaments are densely distributed with holes with the average pore diameter of 0.2 micrometer, and suspended matters with larger particle sizes are intercepted.

(2) The membrane frame (the water collecting tank and the supporting tube) is made of titanium alloy materials, so that the corrosion of sewage to the frame can be effectively reduced, and the service life of the frame is prolonged; meanwhile, the membrane frame adopts a split type assembly mode, so that the membrane frame can be assembled in a narrow space in a combined mode, and the membrane frame is convenient to install on site.

(3) The independent diaphragm is connected with the water collecting main pipe through the water collecting branch pipe, the double-groove sealing rings are arranged at two ends of the water collecting branch pipe, and the double-groove sealing rings are of slot type structures, so that the diaphragm can be conveniently connected with the water collecting main pipe.

(4) The aeration pipe adopts the diaphragm clearance mode of arranging in turn, and the pipeline is perforated and is adopted two rows of modes about the vertical direction and arrange, and during normal aeration, the air current accessible is arranged the trachea or is arranged the trachea down for the membrane silk shake aeration, has both realized the shake of membrane silk, has prevented again that the dirt that the interior mud enrichment of aeration pipe caused from blockking up.

(5) The effluent of the membrane generates certain negative pressure at the front end of the pump by virtue of the suction pump, so that pressure difference is generated between the inner surface and the outer surface of the membrane wire, and under the action of the pressure difference, clear water permeates through the membrane and solid suspended matters are intercepted. The operation of the suction pump adopts a circulation intermittent operation mode, so that the phenomenon that the water yield is reduced because too much sludge is attached to the surface of the membrane due to long-time operation is avoided.

(6) The backwash system adopts the "from back pressure" technique of unique design, lead all the way and get into the backwash water pitcher at the product water pipeline, through the periodic intermittent type operation of unique pipe-line design and cooperation (5) th suction pump, carry out the topping-up to the backwash water pitcher at the product water stage, and maintain certain pressure in the jar, when producing water and ending, under the pressure effect, the water of backwash water pitcher passes through the pipeline and flows back to the MBR membrane in, form certain pressure in the MBR membrane, the pressure direction is opposite with the pressure direction of producing water, cause originally to produce the mud that the water stage adheres to on the membrane surface and can get rid of fast. Because the technology does not need to additionally arrange a pump, the use is simple and convenient, and the maintenance is convenient.

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

the novel membrane system of the sewage treatment device provided by the utility model is simple and convenient in system installation and disassembly process, and easy to operate and maintain. The problem of pollution and blockage of the traditional membrane component system is solved through the optimized design, the service life of the membrane is prolonged, and meanwhile, the sewage treatment system is more stable; the automatic proportional pump in the backwashing system does not need power consumption, so that the power consumption cost can be effectively saved, the frequent action of the conventional electromagnetic valve or pneumatic valve is avoided through the ingenious design of the pipeline, the frequent damage of components can not be generated, and the normal and stable operation of the equipment is ensured. The utility model can be well suitable for the optimization and the reconstruction of new and old complete equipment on an offshore platform or land, and the like.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic structural view of a diaphragm according to the present invention;

FIG. 3 is a schematic structural view of a frame of a membrane stack according to the present invention;

FIG. 4 is a schematic view of the structure of the membrane of the present invention mounted on the frame of the membrane stack;

FIG. 5 is a longitudinal sectional view of a horizontal branch pipe according to the present invention;

FIG. 6 is a plan view showing the aeration process of the horizontal branch pipe to the membrane according to the present invention;

FIG. 7 is a left side view of the process of aeration of the membrane by the horizontal branch pipes according to the present invention;

FIG. 8 is a schematic view showing the structure of a water collecting branch pipe according to the present invention;

fig. 9 is a schematic structural diagram of the plug of the present invention.

Fig. 10 is a schematic view of a current limiting element according to the present invention.

Fig. 11 is a schematic structural view of the breather valve of the present invention.

Wherein, 1, a membrane; 101. a water collection tank; 102. a water outlet; 103. supporting a tube; 104. membrane silk; 2. a membrane stack frame; 201. a main support; 202. a card slot; 203. corner brace; 204. fixing a pressing strip; 3. a water collecting main pipe; 4. an aeration main pipe; 5. an aeration branch pipe; 501. a vertical branch pipe; 502. a horizontal branch pipe; 6. a water collecting branch pipe; 601. a U-shaped connecting pipe; 602. a seal ring; 7. a plug; 801. a union joint; 802. a solid straight tube; 901. a body; 902. a sphere; 903. a screw cap; 904. a flat bell mouth; 905. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

As shown in fig. 1 to 11, a novel membrane system of a domestic sewage treatment device of an offshore platform comprises a membrane component, a water production pump and a backwashing system; the membrane module comprises a membrane stack frame 2, a plurality of membranes 1 are arranged on the membrane stack frame 2 in parallel, and a water collecting pipeline and an aeration pipeline are arranged on the membranes; the water collecting pipeline comprises a water collecting main pipe 3, and the water collecting main pipe 3 is connected with each membrane 1 through a plurality of water collecting branch pipes 6; the aeration pipeline comprises an aeration main pipe 4 and a plurality of groups of aeration branch pipes 5, and a group of aeration branch pipes 5 are arranged between every two adjacent membranes 1; the water inlet pipeline of the water producing pump is connected with the water collecting main pipe 3 of the membrane component, the water outlet pipeline is divided into two branches, one branch is connected with the water outlet through the flow limiting element, and the other branch is connected with the backwashing system. The flow limiting element consists of two UPVC union joints 801 with the same size and a solid straight pipe 802 with a hole in the middle, and the central hole of the solid straight pipe 802 is used as a flow limiting water channel.

The membrane 1 is provided with two water collecting tanks 101 which are arranged in parallel, the middle of each water collecting tank 101 is connected through a plurality of membrane wires 104, the end parts of the two water collecting tanks 101 are connected through two supporting pipes 103, the water collecting tanks 101 and the supporting pipes 103 form a rectangular frame structure, and one water collecting tank is provided with a water outlet 102. When the membrane 1 is installed, the water collecting grooves 101 are in the horizontal direction, the two water collecting grooves 101 are both in an inner cavity structure, two ends of each membrane wire 104 are integrally formed through bonding and extrusion, and two ends of the water outlet of each membrane wire 104 are converged into the water collecting grooves 101 at two ends. The upper water collecting tank 101 and the lower water collecting tank 101 are connected through the titanium alloy supporting pipes 103 on two sides, so that smoothness of water producing flow passages around is kept, meanwhile, the titanium alloy supporting pipes 103 also play a role in supporting the membrane wires 104, and self-supporting placement of the single membrane wires 104 can be achieved. Because the length of the titanium alloy support tube is less than the straightening length of the membrane wire 104, the membrane wire 104 can be kept in a loose state, the axial stress of the membrane wire 104 is reduced to the maximum extent, and the service life is prolonged.

The membrane stack frame 2 comprises a main support 201, wherein a plurality of clamping grooves 202 for fixing the membrane 1 are formed in the main support 201; the top edge of the main bracket is provided with a corner support 203, and the top of the main bracket is provided with a fixed pressing strip 204. The angle support 203 is used for fixing the water collecting main pipe 3, and the fixing pressing strip 204 is used for fixing the diaphragm 1.

The membrane stack frame structure is made of a titanium alloy material resistant to sewage and seawater corrosion, the frames on each side can be independently disassembled and assembled, and the membrane stack frame structure can be effectively applied to the upgrading of membrane units of new and old devices. The installation and the fixing of the diaphragm 1 depend on four rows of diaphragm fixing clamping grooves 202 fixed on the titanium alloy frame through bolts, the clamping grooves 202 have certain thickness, so that uniform gaps can be kept between the diaphragms 1, and each diaphragm 1 can be drawn out from the top under the fixation of the upper clamping groove 202 and the lower clamping groove 202. Meanwhile, each diaphragm 1 can independently produce water, and later maintenance and replacement are greatly facilitated.

The aeration branch pipes 5 comprise vertical branch pipes 501 and horizontal branch pipes 502; a plurality of aeration holes with opening directions inclined upwards by 45 degrees are arranged along the extending direction of the horizontal branch pipe 502; three water drainage holes with vertically downward opening directions are uniformly distributed on the horizontal branch pipe. As shown in fig. 5 to 7, the positions of the aeration holes are schematically drawn from a plurality of viewing angles.

The aeration main pipe 4 is arranged at the bottom and the side face of the membrane stack frame 2, the aeration branch pipes 5 are arranged between the membranes 1 through branch pipelines, the membranes 1 and the aeration branch pipes 5 are installed at intervals, each aeration branch pipe 5 is responsible for flushing and aerating the surfaces of two adjacent membranes 1, on one hand, the air flow can uniformly sweep the two faces of the membranes 1, and on the other hand, due to the space separation effect of the aeration branch pipes 5, the membrane wires 104 of the adjacent membranes 1 can be prevented from being wound and adhered in the shaking process.

The horizontal branch pipes 502 adopt a 45-degree inclined upward alternate tapping mode to realize uniform distribution of aeration gas. And the three water outlets facing downwards are used for blowing out the water or suspended matters temporarily stored in the horizontal branch pipe 502 to keep the horizontal branch pipe 502 smooth.

The main body of the water collecting branch pipe 6 is a U-shaped connecting pipe 601, and two sealing rings 602 are nested outside the vertical parts at the two ends of the connecting pipe. As shown in FIG. 8, the structure of the branch water collecting pipe 6 adopts a double-sealing ring 602 form, one end of which can be inserted into the water outlet 102 at the top of the membrane 1, and the other end of which can be inserted into the clamping hole of the main water collecting pipe 3, and sewage leakage can be effectively prevented through two sealing rings. In addition, the water collecting branch pipe 6 is not connected to the upper part of the clamping hole of the water collecting main pipe 3, and the water collecting branch pipe is required to be sealed by a plug 7 at the moment so as to prevent water leakage. The special plug 7 adopts a pipe section with one end plugged and the other end provided with double sealing rings which are identical, and can be used for plugging the interface under the condition that a single diaphragm 1 is damaged and maintaining the normal work of other diaphragms 1. All adopt this kind of direct bayonet connected mode, be convenient for install and dismantle.

A plurality of water inlet holes are uniformly distributed on the water collecting main pipe 3, one end of the water collecting branch pipe 6 is inserted into one water inlet hole, and the other end of the water collecting branch pipe is inserted into the water outlet 102 of one membrane 1.

The length of the membrane wire 104 is greater than the length of the support tube 103.

The backwashing system comprises a backwashing tank, a breather valve is arranged at the middle upper part of the backwashing tank, and a one-way valve, a flow-limiting element, a proportional pump and an electromagnetic valve are arranged in parallel on a pipeline between the backwashing tank and the water producing pump; wherein the installation direction of the one-way valve is from the backwash tank to the water production pump. The breather valve is a UPVC one-way valve (size 1/2'), and is a one-way flow device consisting of a body 901, a ball 902, a screw cap 903, a flat socket 904 and a sealing ring 905, as shown in FIG. 11, the breather valve can only allow the one-way flow of overflowing liquid according to the direction pointed by an arrow, and plays a role in sealing and cutting off water flow.

The system adopts an automatic back pressure technology to carry out backwashing.

When the water production pump works normally, the water production pipeline keeps certain pressure due to the pipe diameter difference of the water production pipeline and the action of the flow limiting device, and the produced water is filled into the backwashing water tank under the action of the pressure. Because the middle upper part of the backwashing tank is provided with the special breather valve, partial gas can be discharged in the water flow filling process, and certain water volume in the tank body is ensured. When the liquid level reaches the pipeline position of the breather valve, the breather valve stops exhausting because water flow is filled into the front end of the breather valve, the liquid level continues rising, a part of air remained on the tank top is compressed, finally, the water filling process is finished because the pressure is balanced with the pressure of the water production pipeline, and at the moment, all the water production pumps produce water and discharge the water out of the system through an external discharge pipeline.

At the stage of stopping the water production pump, the pressure of the water production pipeline is reduced due to the stop of the pump, the pressure in the backwashing tank is higher, the produced water flows back, and the produced water flows to one side of the membrane assembly through the arranged one-way valve, so that the backwashing purpose of the membrane assembly is achieved. When on-line agent cleaning is needed, the electromagnetic valve at the front end of the automatic proportional pump is automatically started, and because the pipeline at the front end of the automatic proportional pump is not provided with a flow limiting element, water flow can preferentially mix the agent into the backwashing water tank through the pump. In the backwashing stage, backwashing water carrying chemicals enters the inside of the membrane filaments 104, so that the on-line chemical cleaning of the membrane module is realized.

The water producing pump continuously operates in a circulation intermittent mode. The water producing pump is controlled by normal liquid level and time sequence control and pressure control are added. When the starting liquid level is reached, a time sequence control program is executed firstly, the operation is stopped for a period of time after the operation is carried out for a period of time, and the cyclic reciprocation is carried out until the stopping liquid level is reached. When the negative pressure of the water production pipeline rises to a set value, the water production pump automatically stops and can normally run after the pressure is recovered.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel membrane system of a domestic sewage treatment device of an offshore platform comprises a membrane component, a water production pump and a backwashing system; the membrane component is characterized by comprising a membrane stack frame (2), wherein a plurality of membranes (1) are arranged on the membrane stack frame (2) in parallel and are provided with water collecting pipelines and aeration pipelines; the water collecting pipeline comprises a water collecting main pipe (3), and the water collecting main pipe (3) is connected with each membrane (1) through a plurality of water collecting branch pipes (6); the aeration pipeline comprises an aeration main pipe (4) and a plurality of groups of aeration branch pipes (5), and a group of aeration branch pipes (5) are arranged between every two adjacent membranes (1); the water inlet pipeline of the water producing pump is connected with a water collecting main pipe (3) of the membrane component, the water outlet pipeline is divided into two branches, one branch is connected with the water outlet through a flow limiting element, and the other branch is connected with a backwashing system.

2. A novel membrane system of an offshore platform domestic sewage treatment device according to claim 1, wherein two water collection tanks (101) arranged in parallel are arranged on the membrane (1), the water collection tanks (101) are connected with each other through a plurality of membrane wires (104), the end parts of the two water collection tanks (101) are connected with each other through two support pipes (103), the water collection tanks (101) and the support pipes (103) form a rectangular frame structure, and one water collection tank is provided with a water outlet (102).

3. A novel membrane system of an offshore platform domestic sewage treatment device according to claim 1, wherein the membrane stack frame (2) comprises a main support (201), and a plurality of clamping grooves (202) for fixing the membrane (1) are arranged inside the main support (201); the edge of the top of the main bracket is provided with a corner support (203), and the top of the main bracket is provided with a fixed pressing strip (204).

4. A novel membrane system of an offshore platform domestic sewage treatment plant according to claim 1, wherein said aeration leg (5) comprises a vertical leg (501) and a horizontal leg (502); a plurality of aeration holes with opening directions inclined upwards by 45 degrees are arranged along the extending direction of the horizontal branch pipe (502); three drainage holes with vertically downward opening directions are uniformly distributed on the horizontal branch pipe (502).

5. A novel membrane system of an offshore platform domestic sewage treatment device according to claim 1, wherein the main body of the water collecting branch pipe (6) is a U-shaped connecting pipe (601), and two sealing rings (602) are nested outside the vertical parts at the two ends of the main body.

6. A novel membrane system of a domestic sewage treatment device on an offshore platform according to claim 2 or 5, wherein a plurality of water inlet holes are uniformly distributed on the water collecting main pipe (3), one end of the water collecting branch pipe (6) is inserted into one water inlet hole, and the other end is inserted into the water outlet (102) of one membrane (1).

7. The novel membrane system of an offshore platform domestic sewage treatment plant according to claim 2, wherein the length of said membrane filaments (104) is greater than the length of the support tube (103).

8. The novel membrane system of the offshore platform domestic sewage treatment device according to claim 2, wherein the backwash system comprises a backwash tank, a breather valve is arranged at the middle upper part of the backwash tank, and a check valve, a flow limiting element, a proportional pump and an electromagnetic valve are arranged in parallel on a pipeline between the backwash tank and the water production pump; wherein the installation direction of the one-way valve is from the backwash tank to the water production pump.

9. The novel membrane system of offshore platform sewage treatment plant of claim 2, characterized in that the water production pump is operated continuously in a cyclic intermittent manner.