Discharge pipe for cleaning gas-water mixed ultrafiltration membrane

Abstract

The utility model relates to the technical field of ultrafiltration membrane cleaning, and provides a discharge pipe for cleaning an air-water mixing ultrafiltration membrane, which comprises a first pipeline and a second pipeline, one end of the first pipeline is used for being communicated with a water outlet of an ultrafiltration membrane component; the second pipeline comprises a plurality of pipeline sections, and each pipeline section comprises a plurality of shunting pipelines; the plurality of shunting pipelines in the same pipeline section are communicated in parallel, the plurality of shunting pipelines in two adjacent pipeline sections are communicated in series, and the plurality of shunting pipelines positioned at one end of the second pipeline are communicated with one end, far away from the ultrafiltration membrane assembly, of the first pipeline. According to the utility model, the plurality of shunting pipelines are arranged and are matched in series and in parallel, so that bubbles in the pipelines can be continuously segmented and combined, and gas is refined into tiny bubbles and fully mixed in a liquid phase, so that the gas phase and the liquid phase in the discharge pipe are in a stable state, and the normal operation of the discharge pipe is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrafiltration membrane cleaning, in particular to a discharge pipe for cleaning an air-water mixed ultrafiltration membrane. Background Art

[0002] Ultrafiltration membrane is a technology that uses microporous membrane filtration to effectively intercept suspended matter, colloids, macromolecular substances, microorganisms and viruses in fluids. It is widely used in the fields of purified water, sewage and wastewater, recycled water reuse, concentration separation, and medical heat source removal. As the ultrafiltration membrane assembly is used for a longer time, the membrane assembly will become clogged. During its use, compressed air will be introduced from the bottom of the membrane assembly to vibrate and scrub the membrane fibers from bottom to top, and the water-passing capacity of the membrane assembly will be restored with hydraulic flushing. The cleaning water and air of the membrane assembly are discharged to the outside of the ultrafiltration membrane along the discharge pipe.

[0003] The invention patent with the patent publication number CN105664719A discloses a set of automatic cleaning device and cleaning method for ultrafiltration water purifier, which is characterized by: comprising an ultrafiltration membrane cartridge, a cleaning cartridge, a water inlet, a water outlet, and a sewage outlet at the top of the ultrafiltration cartridge, an ultrafiltration membrane in the ultrafiltration cartridge, and the ultrafiltration membrane comprises a membrane wire casting head and membrane wire. The ultrafiltration membrane casting head and the water inlet of the ultrafiltration cartridge are connected by a central water inlet pipe; the cleaning cartridge comprises an upper water outlet and a lower water inlet, a tee is connected at the water outlet, one end is connected to the sewage outlet of the ultrafiltration cartridge, one end is connected to the air inlet valve, a tee is connected at the water inlet, one end is connected to the water inlet valve, the water inlet valve is connected to the main water inlet pipe, the other end is connected to the lower drain valve, the lower drain valve is connected to the tee, one end of the tee is connected to the lower drain valve, and the other end is connected to the upper drain valve, and the upper drain valve is connected to the water inlet of the ultrafiltration cartridge. The invention does not need to add medicine, physical cleaning can achieve the effect of chemical cleaning, and uses air-water mixed disturbance cleaning, which saves more water than the currently commonly used positive flushing, has more obvious effects, simple structure and convenient operation.

[0004] In the above technical solution, in order to clean the ultrafiltration membrane, a cleaning cylinder and various valve bodies are set up, and the switch control of each valve body is used to allow the gas-water mixture to flush the ultrafiltration membrane, and the gas-water mixture is discharged through the drainage pipeline. However, when the gas-water mixed discharge is in operation, the gas and liquid phases will interfere and hinder each other. This unstable gas-liquid phase will not only lead to relatively poor discharge stability of the discharge pipe, but also cause vibration and water hammer damage to the pipeline, which is not conducive to the normal operation of the ultrafiltration membrane discharge pipe. Utility Model Content

[0005] In view of this, the utility model proposes a discharge pipe for cleaning an air-water mixed ultrafiltration membrane, which can ensure the discharge stability during the mixed discharge of air and water and ensure the normal operation of the discharge pipe.

[0006] The technical solution of the utility model is implemented as follows: The utility model provides a discharge pipe for cleaning an air-water mixed ultrafiltration membrane, comprising a first pipe and a second pipe, wherein:

[0007] One end of the first pipe is used to communicate with the drain port of the ultrafiltration membrane assembly;

[0008] The second pipeline includes a plurality of pipeline sections, and each of the pipeline sections includes a plurality of flow-dividing pipelines;

[0009] The multiple shunt pipes in the same pipe section are connected in parallel, the multiple shunt pipes in two adjacent pipe sections are connected in series, and the multiple shunt pipes located at one end of the second pipe are connected to the end of the first pipe away from the ultrafiltration membrane assembly.

[0010] On the basis of the above technical solution, preferably, two diversion pipes are arranged in each pipe section.

[0011] More preferably, the two diversion pipes in the same pipe section are symmetrically arranged about the center line of the second pipe.

[0012] More preferably, the pipe section is in a diamond shape.

[0013] On the basis of the above technical solution, preferably, it further comprises an exhaust valve, which is fixedly arranged on the peripheral side of the first pipeline and communicated with the interior thereof.

[0014] More preferably, the first pipeline is arranged in a horizontal direction, and the second pipeline is arranged in a vertical direction at one end close to the first pipeline and is located below the first pipeline.

[0015] More preferably, the exhaust valve is arranged above one end of the first pipeline close to the second pipeline.

[0016] More preferably, the second pipeline is arranged in a vertical direction at one end away from the first pipeline and is located below the first pipeline, and the middle of the second pipeline is arranged in a horizontal direction.

[0017] On the basis of the above technical solution, preferably, it further comprises a control valve, wherein the control valve is fixedly arranged on the second pipeline and communicated with the interior thereof, and is used for controlling the opening and closing of the second pipeline.

[0018] More preferably, it further comprises a flow meter, wherein the flow meter is fixedly arranged on the second pipeline and communicated with the interior thereof.

[0019] Compared with the prior art, the utility model has the following advantages for the discharge pipe for cleaning the gas-water mixed ultrafiltration membrane:

[0020] Beneficial effects:

[0021] (1) By setting up multiple diversion pipes and using their series and parallel connection, the bubbles in the pipes can be continuously divided and combined, so that the gas can be refined into tiny bubbles and fully mixed in the liquid phase, so that the gas and liquid phases in the discharge pipe are in a stable state, thereby ensuring the normal operation of the discharge pipe;

[0022] (2) By setting up an exhaust valve, most of the gas can be discharged before the gas-water mixture enters the diversion pipeline, thereby alleviating the fluctuation and water hammer damage caused by the gas-liquid phase in the pipeline and the burden on the diversion pipeline;

[0023] (3) By setting a control valve, the on-off of the discharge pipe and the flow rate of the gas-water mixture in the discharge pipe can be controlled. By setting a flow meter, the discharge parameters of the gas-water mixture in the discharge pipe can be monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of a discharge pipe for cleaning an air-water mixed ultrafiltration membrane according to the utility model;

[0026] Figure 2 The utility model is a schematic diagram of the structure of a pipe section in a discharge pipe for cleaning an air-water mixed ultrafiltration membrane.

[0027] Among them: 1. first pipeline; 2. second pipeline; 21. pipeline section; 211. diversion pipeline; 3. exhaust valve; 4. control valve; 5. flow meter; 6. ultrafiltration membrane assembly. DETAILED DESCRIPTION

[0028] The following will be combined with the specific implementation of the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 and Figure 2 As shown, a discharge pipe for cleaning an air-water mixed ultrafiltration membrane of the utility model comprises a first pipe 1 and a second pipe 2.

[0030] One end of the first pipe 1 is connected to the drain port of the ultrafiltration membrane assembly 6 for discharging the gas-water mixture for cleaning the ultrafiltration membrane.

[0031] One end of the second pipeline 2 is connected to the first pipeline 1, and the other end is connected to the wastewater collection equipment, which is used to cooperate with the first pipeline 1 to transport the gas-water mixture. The second pipeline 2 includes multiple pipeline sections 21, and each pipeline section 21 includes multiple shunt pipelines 211; the multiple shunt pipelines 211 in the same pipeline section 21 are connected in parallel, and the multiple shunt pipelines 211 in two adjacent pipeline sections 21 are connected in series, and the multiple shunt pipelines 211 located at one end of the second pipeline 2 are connected to the end of the first pipeline 1 away from the ultrafiltration membrane assembly 6, that is, when the gas-water mixture flows into the second pipeline 2 through the first pipeline, after the shunt cutting of the multiple shunt pipelines 211 in the same pipeline section 21, and the mixing between adjacent pipeline sections 21, the bubbles inside the pipeline can be repeatedly cut and refined into tiny bubbles, so that they are fully mixed with the liquid phase, so that the gas-liquid phase in the discharge pipe is maintained in a stable state, which solves the emission fluctuation problem caused by the mutual interference and obstruction of gas and water in the gas-water mixture, and reduces the water hammer damage during the gas-liquid phase transportation process.

[0032] like Figure 2 As shown, in order to avoid an excessive number of shunt pipes 211 which would increase the space occupied by the discharge pipe, and to avoid the shunt pipes 211 being too thin in inner diameter and easily blocked, it is preferred to have two shunt pipes 211 in each pipe section 21 .

[0033] After the gas-water mixture enters the pipe section 21 from the inlet, the gas and liquid phases will enter the two branch pipes 211 respectively. Due to the gas resistance phenomenon of the gas in the branch pipe 211, the two branch pipes 211 in the same pipe section 21 form pressures P1 and P2 respectively. When there are more bubbles entering the first branch pipe 211, the gas resistance is strong and the pressure P1 rises. P1>P2. At this time, the pressure of the first branch pipe 211 at the inlet of the pipe section 21 is high and the resistance is large. The gas phase entering the first branch pipe 211 is reduced, P1 decreases, and the gas phase is forced to enter the second branch pipe 211; the gas entering the second branch pipe 211 There are many phase changes, the gas resistance is strong and the pressure P2 rises; when P2>P1, the pressure of the second branch pipe 211 at the entrance of the pipe section 21 is high and the resistance is large, the gas phase entering the second branch pipe 211 is reduced, and the gas phase is forced to enter the first branch pipe 211; the two branch pipes 211 in the same pipe section 21 push and pull each other to form a cycle, so that the gas phase is pulled left and right at the entrance of the pipe section 21 and broken, and a relatively uniform and stable gas-liquid mixed phase is formed at the outlet. Through the series effect of the multi-stage pipe section 21, the gas-liquid phase repeatedly acts in the combined structure of the multi-stage pipe section 21, and finally forms an extremely stable gas-liquid mixed phase.

[0034] In order to ensure the stability of the gas-liquid phases running in the two branch pipes 211 in the same pipe section 21, it is preferred that the two branch pipes 211 in the same pipe section 21 are symmetrically arranged about the center line of the second pipe 2; specifically, it is preferred that the pipe section 21 is diamond-shaped with rounded top angles to avoid greater resistance to the gas-liquid phases due to the existence of too many complex structures.

[0035] The exhaust valve 3 is used to exhaust the gas in the first pipeline 1. The exhaust valve 3 is fixedly arranged on the peripheral side of the first pipeline 1 and is connected with the interior thereof. Part of the gas in the first pipeline 1 can be discharged through the exhaust valve 3, thereby pre-treating the gas-liquid phase to avoid a large number of bubbles in the gas-water mixture and increasing the burden on the second pipeline.

[0036] like Figure 1 As shown, the first pipeline 1 is arranged in the horizontal direction, and the second pipeline 2 is arranged in the vertical direction near one end of the first pipeline 1 and is located below the first pipeline 1. Not only can the gas in the first pipeline 1 be discharged through the exhaust valve 3, but also part of the gas in the second pipeline 2 can flow back into the first pipeline 1 due to buoyancy, and then be discharged through the exhaust valve 3; correspondingly, in order to improve its exhaust effect, it is preferred that the exhaust valve 3 is arranged above the first pipeline 1 near one end of the second pipeline 2.

[0037] As for the shape of the second pipe 2, the second pipe 2 can be arranged in the vertical direction away from one end of the first pipe 1 and located below the first pipe 1, and the middle of the second pipe 2 can be arranged in the horizontal direction, that is, the second pipe 2 is formed into a U shape as a whole, so as to increase the length of the second pipe 2 and reduce the space it occupies.

[0038] The control valve 4 is used to control the on-off of the second pipeline 2. The control valve 4 is fixedly arranged on the second pipeline 2 and is connected to the inside thereof. By rotating the control handle of the control valve 4, the flow rate of the gas-water mixture inside the pipeline can also be adjusted to adapt it to the corresponding working conditions.

[0039] The flow meter 5 is used to detect the operating parameters of the gas-water mixture. The flow meter 5 is fixedly arranged on the second pipeline 2 and is connected to the interior thereof.

[0040] The working principle of the discharge pipe for cleaning the gas-water mixed ultrafiltration membrane of the utility model is as follows:

[0041] The gas-water mixture used to flush the ultrafiltration membrane assembly 6 is discharged from the ultrafiltration membrane assembly 6 and directly enters the first pipe 1. Most of the gas in the first pipe 1 is discharged to the external environment through the exhaust valve 3, and the remaining gas continues to flow into the second pipe 2 in the form of bubbles accompanied by the liquid phase. After repeated cutting and mixing of the bubbles by multiple diversion pipes 211, the bubbles can be refined and divided into tiny bubbles and fully mixed with the liquid phase, so that the gas-liquid phase in the discharge pipe is maintained in a stable state. The stable gas-liquid phase is finally discharged to the gas-water collection device through the end of the second pipe 2 away from the first pipe 1.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane, characterized in that: It comprises a first pipeline (1) and a second pipeline (2), wherein: One end of the first pipe (1) is used to communicate with the drain port of the ultrafiltration membrane assembly (6); The second pipeline (2) comprises a plurality of pipeline sections (21), and each of the pipeline sections (21) comprises a plurality of branch pipelines (211); The plurality of shunt pipes (211) in the same pipe section (21) are connected in parallel, the plurality of shunt pipes (211) in two adjacent pipe sections (21) are connected in series, and the plurality of shunt pipes (211) located at one end of the second pipe (2) are connected to an end of the first pipe (1) away from the ultrafiltration membrane assembly (6).

2. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane as claimed in claim 1, characterized in that: Two flow-dividing pipes (211) are arranged in each pipe section (21).

3. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane as claimed in claim 2, characterized in that: The two flow-dividing pipes (211) in the same pipe section (21) are symmetrically arranged about the center line of the second pipe (2).

4. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane as claimed in claim 3, characterized in that: The pipe section (21) is in a rhombus shape.

5. The exhaust pipe for cleaning an air-water mixed ultrafiltration membrane according to claim 1, characterized in that: It also comprises an exhaust valve (3), which is fixedly arranged on the peripheral side of the first pipeline (1) and is connected to the interior thereof.

6. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane as claimed in claim 5, characterized in that: The first pipeline (1) is arranged in a horizontal direction, and the second pipeline (2) is arranged in a vertical direction at one end close to the first pipeline (1) and is located below the first pipeline (1).

7. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane as claimed in claim 6, characterized in that: The exhaust valve (3) is arranged above one end of the first pipeline (1) close to the second pipeline (2).

8. A discharge pipe for cleaning an air-water mixed ultrafiltration membrane as claimed in claim 7, characterized in that: The end of the second pipeline (2) away from the first pipeline (1) is arranged in the vertical direction and is located below the first pipeline (1); the middle of the second pipeline (2) is arranged in the horizontal direction.

9. The exhaust pipe for cleaning an air-water mixed ultrafiltration membrane according to claim 1, characterized in that: It also comprises a control valve (4), which is fixedly arranged on the second pipeline (2) and communicated with the interior thereof, and is used for controlling the opening and closing of the second pipeline (2).

10. The exhaust pipe for cleaning an air-water mixed ultrafiltration membrane according to claim 9, characterized in that: It also comprises a flow meter (5), wherein the flow meter (5) is fixedly arranged on the second pipeline (2) and is connected to the interior of the second pipeline (2).

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