CN213668720U - Tubular microfiltration membrane circulation treatment unit - Google Patents

Tubular microfiltration membrane circulation treatment unit Download PDF

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Publication number
CN213668720U
CN213668720U CN202021324249.5U CN202021324249U CN213668720U CN 213668720 U CN213668720 U CN 213668720U CN 202021324249 U CN202021324249 U CN 202021324249U CN 213668720 U CN213668720 U CN 213668720U
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water
tank
pipe
branch pipe
valve
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CN202021324249.5U
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冯雄达
缪叙法
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JIANGSU SAFELY ENVIRONMENT ENGINEERING CO LTD
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JIANGSU SAFELY ENVIRONMENT ENGINEERING CO LTD
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Abstract

The utility model discloses a tubular microfiltration membrane cyclic processing unit, including at least a set of tubular membrane group, the both ends of tubular membrane group set up inlet tube and dense water pipe respectively, its side of tubular membrane group still is equipped with a product water pipe, the inlet tube links to each other with the delivery port of concentrated pond lower extreme, the dense water pipe links to each other with the recovery mouth of concentrated pond upper end, product water pipe links to each other with the product water pond upper end, the intercommunication is equipped with a first lateral branch on the product water pipe, first lateral branch is through three first lateral branches respectively with the descaling bath, it links to each other to wash with alkaline groove and clear water tank, the intercommunication is equipped with the second lateral branch on the dense water pipe, the second lateral branch is through three second lateral branches respectively with the descaling bath, it links to each other to wash with alkaline groove and clear water tank, the intercommunication is equipped with a recoil branch pipe on. The utility model discloses the medicament cycle number is less, and the medicament volume is very little, the sanitization, membrane pipe long service life.

Description

Tubular microfiltration membrane circulation treatment unit
Technical Field
The utility model relates to a tubular microfiltration membrane cyclic processing unit.
Background
Field of application of tubular membranes: heavy metal wastewater treatment, photovoltaic and semiconductor industries, high hardness wastewater softening and the like. In the tubular filter membrane process, feed liquid flows through the inner surface of a membrane tube under the drive of pressure, intercepted substances (suspended solid particles) are carried out of the membrane tube by concentrated solution and cannot be accumulated on the surface of the membrane to cause pollution and blockage, the filtration mode is also called cross flow filtration, and the feed liquid flows through the surface of the filter membrane in a tangential direction under the cross flow filtration mode, so that the surface of the membrane forms a turbulent flow state, thereby preventing the particles from accumulating into a cake layer, and in addition, the continuous scouring action also enables high-concentration suspended solids to flow out of the tubular membrane along with the concentrated solution.
The POREX brand tubular membrane module has the following characteristics
1. High flux: the general operation flux can reach 300-500 lmh;
2. the normal working pressure is 3-4.5bar, and the maximum pressure resistance is 7 bar;
3. can treat the waste water with high solid content, the solid content can reach 5 percent (weight ratio);
4. excellent chemical resistance and can be operated in a pH range from 1 to 14. In addition, the chemical cleaning can adopt acid-base liquid medicine or oxidant with extremely high concentration, and the original flux can be recovered to the maximum extent;
5. low turbidity of produced water: the turbidity of the produced water is equal to that of the produced water of the hollow fiber ultrafiltration membrane, so the produced water can be directly sent to a rear-end water recycling system, the process flow of the recycling system is shortened, and the investment cost and space are reduced;
6. when the method is applied to heavy metal wastewater or fluorine-containing wastewater, a softened water system, grinding wastewater and the like, compared with the traditional sedimentation tank, the method not only reduces the addition of medicaments, but also can obtain better effluent quality due to interface filtration, thereby enabling standard discharge and water reuse to be possible;
7. backwashing: a unique "mosaic" anchor-type structural membrane allows backwashing. By backwashing, the cake layer accumulated on the membrane surface during operation can be flushed back into the membrane tubes, thereby extending the cleaning cycle of the membrane. In addition, by arranging the backwashing column and adopting compressed air as driving force, water in the backwashing column is pushed to reversely backflush, so that the membrane can be backflushed for a very short time, and the consumption of backwashing water is saved;
8. the rack-mounted structure is simple in equipment integration.
However, the current TMF tubular membrane processing unit has the disadvantages of less medicament circulation times, larger medicament amount and unclean cleaning.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a tubular microfiltration membrane circulation processing unit, the medicament number of cycles is less, and the medicament volume is very little, the sanitization, membrane tube long service life.
In order to realize the above purpose, the technical scheme of the utility model a design a tubular microfiltration membrane cyclic processing unit, including at least a set of tubular membrane group, the both ends of tubular membrane group set up inlet tube and thick water pipe respectively, its side of tubular membrane group still is equipped with a product water pipe, the inlet tube links to each other with the delivery port of concentrated pond lower extreme, the thick water pipe links to each other with the recovery mouth of concentrated pond upper end, product water pipe links to each other with the product water pond upper end, the intercommunication is equipped with a first branch pipe on the product water pipe, first branch pipe passes through three first branch pipes respectively with the descaling bath, wash with alkaline groove and clear water case link to each other, the intercommunication is equipped with the second branch pipe on the thick water pipe, the second branch pipe passes through three second branch pipes respectively with the descaling bath, wash with alkaline groove and clear water case link to each other, the intercommunication is equipped with a recoil branch pipe. The utility model discloses its aim at membrane flux (show to produce water flow) when descending to a certain extent, through the chemical cleaning of pertinence for membrane flux resumes the initial value. The concentration tank is the front-end reaction tank.
The further technical proposal is that a tubular membrane circulating pump and a water inlet valve are sequentially arranged on the water inlet pipe along the direction from the concentration tank to the tubular membrane group; a concentrated water valve is arranged on the concentrated water pipe along the direction of the tubular membrane group to the concentration tank; along the water production direction, a water production valve is arranged on the water production pipe. The tubular membrane circulating pump is used for continuously sending liquid in the concentration tank to the tubular membrane component for solid-liquid separation, and the flow rate of the circulating pump is always much higher than the system treatment water amount (equal to the tubular membrane water yield) in consideration of cross-flow filtration. When the power of the circulating pump is very high, the pump is stopped when the backflushing is not desired for protecting the motor, at the moment, a water inlet automatic valve and a backflow automatic valve can be additionally arranged at the inlet of the membrane module, the circulating pump is kept running during backflushing, and only the backflow automatic valve is opened to enable the mixed liquid to flow back to the concentration tank. Or the frequency of the pump is reduced during backwashing by using variable frequency.
The back flushing branch pipe is also communicated with a flushing branch pipe communicated with the water inlet pipe, the back flushing branch pipe is provided with a water pump used as a flushing pump or a back flushing pump, the back flushing branch pipe is provided with a back flushing valve, and the flushing branch pipe is provided with a flushing water inlet valve. The backflushing system of the tubular membrane consists of a backflushing column, a section of backflushing compressed air pipeline valve (a manual valve, a check valve, a pressure reducing valve, an electromagnetic valve/an air-operated valve) and an air-operated valve on a water production side, wherein the backflushing aims to drive water stored in the backflushing column (producing water for the tubular membrane) by using compressed air (less than 20psi, namely 1.4bar), so that the inner surface of the tubular membrane is flushed in the direction opposite to the water production direction during operation, particles accumulated on the membrane surface in a period of time are flushed back into the membrane tube, and then the particles are flushed back into a concentration tank by cross flow in the next circulating water production process. The compressed air pipeline is generally connected to the top end of a backwashing column, and a manual valve, a pressure reducing valve (used for reducing the pressure of compressed air of 5-8 bar to below 1.4bar), an electromagnetic valve (used for automatic control) and a check valve (used for preventing water produced by a tubular membrane in operation from flowing backwards into the air pipeline) are sequentially installed on the compressed air pipeline. The recoil electromagnetic valve is preferably selected from a normally closed type. When the water is produced, the circulating pump runs, the water production pneumatic valve is opened, and the backflushing solenoid valve is closed; when the backflushing is finished, the circulating pump is stopped for a short time, the water production pneumatic valve is closed, and the backflushing solenoid valve is opened; and the valve position is restored to the water production time after the back flushing is finished. In fact, this is another automatic control situation in addition to the automatic control of the liquid level in a tubular membrane system, which requires much fewer valves than the back flushing of a hollow fiber ultrafiltration system.
The further technical scheme is that a water inlet end comprehensive valve and a cleaning pump outlet reflux valve are arranged on a first branch pipe, three lower branch pipes which are respectively communicated with the lower end of a pickling tank, the lower end of an alkaline washing tank and the lower end of a clean water tank are communicated with the first branch pipe, and an acid washing water inlet valve, an alkaline washing water inlet valve and a clean water inlet valve are arranged on the three lower branch pipes; the first branch pipe is communicated with a loop branch pipe, and the loop branch pipe is provided with a water inlet valve of the chemical cleaning pump. In some cases a back flushing system is not required, such as the concentration separation of emulsified oil, and this back flushing does not easily restore flux due to the fouling nature of the oil, so it is not meaningful to provide a back flushing system. There are also some applications of material separation at polar flux, and because the permeate volume is very small, the back flush is a loss of overall water production from the system, and therefore a back flush system is not recommended. Generally speaking, backflushing is a preventive measure, which is characterized by flushing out the cake layer on the tubular membrane when it is not tight enough, which can alleviate the decrease of the flux of the tubular membrane, but cannot completely prevent the decrease of the water production flow, so that the presence of a backflushing system does not mean that the tubular membrane can be continuously operated at a stable flux, and therefore, regular chemical cleaning still needs to be performed to completely recover the flux of the membrane.
The further technical scheme is that the first branch pipe is also communicated with an outer discharge branch pipe connected with the collecting tank, and the outer discharge branch pipe is provided with a water inlet end outer discharge valve.
The further technical scheme is that a concentrated water end comprehensive valve is arranged on the second branch pipe, three upper branch pipes are communicated with the second branch pipe, and a concentrated water end backflow valve of the pickling tank, a concentrated water end backflow valve of the alkaline washing tank and a concentrated water end backflow valve of the clean water tank are respectively arranged on the three upper branch pipes.
The further technical proposal is that the concentration tank is a round groove-shaped or square groove-shaped concentration tank made of glass, concrete or polyethylene material, and a stirrer or an aerator is arranged in the concentration tank. The concentration tank is in a round tank shape or a square tank shape, is made of glass, concrete or polyethylene materials, has the design principle that the concentration tank keeps the square shape or the round shape so as to avoid sludge deposition, and can be internally provided with a stirrer or an aerator so as to prevent the sludge deposition in standby. The utility model discloses a many branch roads and the opening and close of the different valves of cooperation all set up clear water tank evacuation process before pickling, alkali cleaning, and the clear water tank evacuation can be washed out remaining medicament in the pipeline, prevents the possibility of sour and sodium hypochlorite contact, has reduced the use amount of medicament, has increased the cycle number of times of medicament, has prolonged the life of membrane tube to it is also cleaner to wash.
Adopt the utility model discloses carry out waste water treatment's step:
comprises the following processing steps which are carried out in sequence: running, stopping and chemically cleaning; the operation process comprises at least one cycle of a water production treatment process and a backwashing treatment process, the water production treatment process and the backwashing treatment process before standby are sequentially carried out after the cycle is finished, and primary standby, standby flushing and secondary standby are sequentially carried out after the backwashing treatment process; the chemical cleaning comprises acid cleaning and/or alkali cleaning; the acid washing comprises the procedures of preparing acid solution and acid washing, and the alkali washing comprises the procedures of preparing alkali solution and alkali washing; the acid washing process and the alkali washing process both comprise a plurality of processes, and the first process in the acid washing process or the alkali washing process is a clear water tank emptying process for flushing out residual medicament in a pipeline and preventing acid from contacting with sodium hypochlorite. The emptying procedure of the clear water tank comprises the following steps: and starting a chemical cleaning pump on the loop branch pipe, opening a water inlet valve of the chemical cleaning pump on the loop branch pipe, opening a clear water inlet valve and an outlet valve at a water inlet end on the outlet branch pipe, and allowing clear water in the clear water tank to enter the collecting tank through the first branch pipe. The shutdown treatment comprises a backwashing procedure before shutdown, a flushing procedure before shutdown and a shutdown procedure which are sequentially carried out. The acid washing process or the alkali washing process comprises an old liquid medicine emptying process, a dissolved medicine water supplementing process, an acid solution supplementing or alkali solution supplementing process and a standing mixing process. The acid washing process and the alkali washing process respectively comprise a clear water tank emptying process, a system shutdown process, an emptying process, a chemical liquid medicine circulating process, a chemical liquid medicine soaking process, a chemical liquid medicine circulating process, a chemical liquid medicine backflow process, a clear water tank waste liquid transferring process, a clear water washing process, an emptying process and a shutdown process which are sequentially carried out. The water production treatment process comprises: starting the tubular membrane circulating pump, opening the water inlet valve to convey the liquid to be treated in the concentration tank to the tubular membrane group for cross-flow filtration, opening the concentrated water valve and the water production valve, allowing the produced water after cross-flow filtration to enter the water production tank, and allowing the concentrated water to flow back to the concentration tank; the treatment time of the produced water treatment process is 30 branches. The backwashing treatment process comprises the following steps: starting a backwashing pump, starting a backwashing valve, a concentrate valve and a water inlet valve, reversely flowing the produced water at the bottom of the water production tank to a water production pipe of the tubular membrane group by the backwashing pump, and flushing the cake layer accumulated on the membrane surface of the tubular membrane group back into the membrane pipe; the backwashing treatment process was carried out for a treatment time of 60 seconds. The backwashing treatment process before standby is the same as the backwashing treatment process; the standby washing procedure comprises the following steps: and starting the flushing pump, opening a flushing water inlet valve, a water inlet valve and a concentrated water valve, enabling water in the water production tank to enter the tubular membrane group through the flushing branch pipe and the water inlet pipe, enabling the flushed flushing liquid to flow back to the concentration tank, and keeping the flushing time for 2 minutes. The backwashing process before the shutdown is as follows: starting a backwashing pump, opening a backwashing valve and a concentrated water valve, reversely feeding produced water in the water production tank into a water production pipe through a backwashing branch pipe, and then discharging the produced water from the concentrated water pipe into a concentration tank, wherein the backwashing time is 60 seconds before stopping; the emptying procedure comprises the steps of opening a water inlet end comprehensive valve and a cleaning pump outlet backflow valve on the third branch pipe, opening a water production end comprehensive valve, a water production end low-level medicament backflow valve and a clear water tank water production end backflow valve on the first branch pipe, and opening a concentrated water end comprehensive valve and a clear water tank concentrated water end backflow valve on the second branch pipe; the evacuation process was carried out for 5 minutes.
The utility model has the advantages and the beneficial effects that: compared with the back flushing of a hollow fiber ultrafiltration system, the utility model needs much less valves for automatic control. The concentration tank is in a round tank shape or a square tank shape, is made of glass, concrete or polyethylene materials, has the design principle that the concentration tank keeps the square shape or the round shape so as to avoid sludge deposition, and can be internally provided with a stirrer or an aerator so as to prevent the sludge deposition in standby. Install an automatic valve of intaking and a backward flow automatic valve additional at membrane module entrance, keep the circulating pump operation when the recoil, only the backward flow automatic valve is opened, lets the mixed liquid backward flow the concentrator tank, can play the effect of protection motor. Through many branches and the opening and close of cooperation different valves, all set up the clear water tank evacuation process before pickling, alkali cleaning, the clear water tank evacuation can be flushed remaining medicament in the pipeline, prevents the possibility of acid and sodium hypochlorite contact, has reduced the use amount of medicament, has increased the cycle number of times of medicament, has prolonged the life of membrane tube to it is also cleaner to wash.
Drawings
FIG. 1 is a schematic view of the operation principle of a tubular microfiltration membrane circulation treatment unit according to the present invention;
FIG. 2 is an enlarged schematic view of the lower left end of FIG. 1;
FIG. 3 is an enlarged schematic view of the lower end of the middle portion of FIG. 1;
FIG. 4 is an enlarged schematic view of the lower right end of FIG. 1;
FIG. 5 is an enlarged schematic view of the upper end of the middle portion of FIG. 1;
FIG. 6 is an enlarged schematic view of the upper right end of FIG. 1;
fig. 7 is a sequence diagram of the operation steps of the present invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 7 (for convenience of illustration, fig. 1 only shows a group of tubular membrane module, for the case of a plurality of tubular membrane modules, a plurality of water inlet pipes, concentrated water pipes, etc. are provided to ensure that the plurality of tubular membrane modules all share the same group of chemical cleaning tank (i.e. pickling tank, alkaline cleaning tank and clear water tank)), the utility model relates to a tubular microfiltration membrane circulating treatment unit, which comprises at least a group of tubular membrane modules 1, wherein both ends of the tubular membrane modules are respectively provided with a water inlet pipe 2 and a concentrated water pipe 3, the side surface of the tubular membrane modules is also provided with a water production pipe 4, the water inlet pipe is connected with a water outlet at the lower end of the concentration tank, the concentrated water pipe is connected with a recovery port at the upper end of the concentration tank, the water production pipe is connected with the upper end of the water production tank, the water production pipe 4 is provided with a first branch pipe 5, the first branch pipe is respectively connected with the pickling tank 7, the alkaline cleaning tank 6 and, the second branch pipe is respectively connected with the pickling tank, the alkaline washing tank and the clear water tank through three second branch pipes, a backflushing branch pipe 10 is communicated with the water production pipe, and the backflushing branch pipe is connected with the lower end of the water production pool 11. The water inlet pipe is sequentially provided with a tubular membrane circulating pump 12 and a water inlet valve 13 along the direction from the concentration tank to the tubular membrane group; a concentrated water valve 14 is arranged on the concentrated water pipe along the direction of the tubular membrane group to the concentration tank; along the water production direction, a water production valve 15 is arranged on the water production pipe. The backflushing branch pipe 10 is also communicated with a flushing branch pipe 16 communicated with the water inlet pipe 2, the backflushing branch pipe is provided with a water pump 17 used as a flushing pump or a backwashing pump, the backflushing branch pipe is provided with a backwashing valve, and the flushing branch pipe is provided with a flushing water inlet valve 18. The first branch pipe is provided with a water inlet end comprehensive valve 19 and a cleaning pump outlet return valve 20, the first branch pipe is communicated with three lower branch pipes which are respectively communicated with the lower end of the pickling tank, the lower end of the alkaline washing tank and the lower end of the clean water tank, and the three lower branch pipes are provided with an acid washing water inlet valve 21, an alkaline washing water inlet valve 22 and a clean water inlet valve 23; the first branch pipe is communicated with a loop branch pipe, and the loop branch pipe is provided with a chemical cleaning pump water inlet valve 24. The first branch pipe is also communicated with an outer discharge branch pipe connected with the collecting tank, and the outer discharge branch pipe is provided with a water inlet end outer discharge valve 25. The second branch pipe is provided with a concentrated water end comprehensive valve 26, the second branch pipe is communicated with three upper branch pipes, and the three upper branch pipes are respectively provided with a pickling tank concentrated water end return valve 27, an alkaline washing tank concentrated water end return valve 28 and a clear water tank concentrated water end return valve 29. The concentration tank 30 is a round groove-shaped or square groove-shaped concentration tank made of glass, concrete or polyethylene, and a stirrer or an aerator 31 is arranged in the concentration tank.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The tubular micro-filtration membrane circulating treatment unit is characterized by comprising at least one group of tubular membrane group, wherein a water inlet pipe and a concentrated water pipe are respectively arranged at two ends of the tubular membrane group, a water production pipe is further arranged on the side surface of the tubular membrane group, the water inlet pipe is connected with a water outlet at the lower end of a concentration tank, the concentrated water pipe is connected with a recovery port at the upper end of the concentration tank, the water production pipe is connected with the upper end of the water production tank, a first branch pipe is communicated with the water production pipe and is respectively connected with a pickling tank, an alkaline washing tank and a clear water tank through three first branch pipes, a second branch pipe is communicated with the concentrated water pipe and is respectively connected with the pickling tank, the alkaline washing tank and the clear water tank through three second branch pipes, a back flushing branch pipe is communicated with the water production pipe and is connected with the.
2. The tubular microfiltration membrane circulation treatment unit according to claim 1, wherein the water inlet pipe is provided with a tubular membrane circulation pump and a water inlet valve in sequence along the direction from the concentration tank to the tubular membrane group; a concentrated water valve is arranged on the concentrated water pipe along the direction of the tubular membrane group to the concentration tank; along the water production direction, a water production valve is arranged on the water production pipe.
3. The tubular microfiltration membrane circulation treatment unit according to claim 1 or 2, wherein the back flushing branch pipe is further communicated with a flushing branch pipe communicated with the water inlet pipe, a water pump serving as a flushing pump or a back flushing pump is arranged on the back flushing branch pipe, a back flushing valve is arranged on the back flushing branch pipe, and a flushing water inlet valve is arranged on the flushing branch pipe.
4. The tubular microfiltration membrane circulation treatment unit according to claim 3, wherein a third branch pipe is arranged on the water inlet pipe in a communication manner, and a water inlet end comprehensive valve and a cleaning pump outlet return valve are arranged on the third branch pipe; the first branch pipe is communicated with three lower branch pipes which are respectively communicated with the lower end of the pickling tank, the lower end of the alkaline washing tank and the lower end of the clean water tank, and the three lower branch pipes are provided with a pickling water inlet valve, an alkaline washing water inlet valve and a clean water inlet valve; the first branch pipe is communicated with a loop branch pipe, and the loop branch pipe is provided with a water inlet valve of the chemical cleaning pump.
5. The tubular microfiltration membrane circulation treatment unit according to claim 4, wherein the first branch pipe is further communicated with an external branch pipe connected with the collection tank, and the external branch pipe is provided with an external water inlet end discharge valve.
6. The tubular microfiltration membrane circulation treatment unit according to claim 5, wherein the second branch pipe is provided with a concentrate end integrated valve, the second branch pipe is communicated with three upper branch pipes, and the three upper branch pipes are respectively provided with a pickling tank concentrate end return valve, an alkaline washing tank concentrate end return valve and a clear water tank concentrate end return valve.
7. The tubular microfiltration membrane circulation treatment unit according to claim 6, wherein the concentration tank is a round tank-shaped or square tank-shaped concentration tank made of glass, concrete or polyethylene, and a stirrer or an aerator is arranged in the concentration tank.
CN202021324249.5U 2020-07-08 2020-07-08 Tubular microfiltration membrane circulation treatment unit Active CN213668720U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021324249.5U CN213668720U (en) 2020-07-08 2020-07-08 Tubular microfiltration membrane circulation treatment unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021324249.5U CN213668720U (en) 2020-07-08 2020-07-08 Tubular microfiltration membrane circulation treatment unit

Publications (1)

Publication Number Publication Date
CN213668720U true CN213668720U (en) 2021-07-13

Family

ID=76724685

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021324249.5U Active CN213668720U (en) 2020-07-08 2020-07-08 Tubular microfiltration membrane circulation treatment unit

Country Status (1)

Country Link
CN (1) CN213668720U (en)

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