A tubular filter element with built-in hollow fiber membrane filaments

Abstract

The application discloses a tube-mounted filter membrane element with built-in hollow fiber membrane filaments, and belongs to the technical field of environment-friendly sewage treatment, comprising a filter membrane unit, a membrane shell and a top plate; the filter membrane unit comprises hollow fiber membrane filaments and water outlet cavities, the water outlet cavities are arranged at two ends of the hollow fiber membrane filaments, water outlets are arranged on the side surface of the water outlet cavities, water outlet pipes are connected with the water outlets, the cavities in the inner side of the hollow fiber membrane filaments are connected and communicated with the cavities of the water outlet cavities, the filter membrane unit is arranged in the membrane shell, when blockage occurs in the interior of the membrane shell, the connecting head and the filter membrane unit in the interior of the membrane shell can be dismounted for cleaning, and the filter membrane unit is installed back after cleaning is completed; the cleaning operation is simple and convenient.

Description

Technical Field

[0001] This invention relates to a filter membrane element, belonging to the field of environmental wastewater treatment technology, and in particular to a tubular filter membrane element with built-in hollow fiber membrane filaments used in wastewater treatment projects. Background Technology

[0002] Currently, MBR (Mechanical Bioreactor) membranes are widely used in wastewater treatment, such as hollow fiber membranes, flat sheet membranes, and external tubular membranes. The external tubular membrane bioreactor, or TMBR for short, is an MBR process primarily designed for treating high-concentration wastewater such as landfill leachate. It mainly consists of a biological system and an external tubular membrane system. The biological system removes organic pollutants, while the external tubular membrane separates sludge and water, directly producing high-quality effluent. The concentrated sludge is returned to the biological treatment tank. The external tubular membrane is installed outside the wastewater tank and connected to it via a circulation pipe. The pressure generated by the circulating water pump separates the sludge and water. Compared to submerged membranes installed inside the wastewater tank, external tubular membranes are easier to operate and maintain.

[0003] External tubular filter membrane elements, such as Figure 6 As shown, it consists of an internal large-diameter filter membrane and an outer cylindrical membrane shell. The membrane shell is composed of a straight tube in the middle and connectors at both ends with a diameter larger than the straight tube in the middle. The outlet pipe is located at the connector. The large-diameter filter membrane, also called a tubular membrane, generally has a diameter between 5 mm and 15 mm. The large-diameter filter membrane is placed inside the membrane shell, and its two ends are fixedly connected to the connectors at both ends of the membrane shell through end caps. The end caps are provided with through holes that connect to the cavity inside the large-diameter filter membrane. The outlet pipe is located on the side of the connector. Wastewater passes through the membrane tube cavity of the tubular filter membrane, while clean water passes through the filter membrane, enters the space between the filter membrane and the membrane shell, and then flows out through the outlet pipe into the clear water tank.

[0004] The existing external tubular filter membrane elements have the following drawbacks: the filter membrane tubes become clogged and difficult to clean during operation.

[0005] When the cavity inside the large-diameter filter tube of an external tubular filter element becomes clogged and needs cleaning, the large-diameter filter tube inside cannot be removed because both ends are sealed. This makes cleaning very difficult, time-consuming, and laborious. Often, the large-diameter filter tube is punctured when a hard tubular object is inserted into it to clear the blockage, rendering the external tubular filter unusable. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a tubular filter membrane element with built-in hollow fiber membrane filaments. The filter membrane of this device can be removed from the membrane housing and is easy to clean.

[0007] The technical solution of this invention to solve the above problems is: a tubular filter membrane element with built-in hollow fiber membrane filaments, the structure of which includes a filter membrane unit, a membrane shell, and a top plate; the filter membrane unit includes hollow fiber membrane filaments and an outlet cavity, the outlet cavity is located at both ends of the hollow fiber membrane filaments, the middle part is a cavity, the outlet is located on the side of the outlet cavity and connected to the cavity, the cavity inside the hollow fiber membrane filament tube is connected to the cavity of the outlet cavity, a screw hole is provided on the outward side of the outlet cavity, the filter membrane unit is located inside the membrane shell, the middle part of the membrane shell is a straight tube, and the two ends are provided with diameters greater than the middle straight tube by 50 mm. The connector is up to 100 mm in diameter. The outlet pipe is located on the connector. A 10 mm to 50 mm high protruding edge is provided 10 mm to 50 mm inward from the inner edge of the connector. The outer side of the edge has protruding threads or screw holes. A through hole and screw holes are provided on the top plate, located on the inner side of the connector edge and the outer side of the edge. A protruding thread is provided on the side facing the edge, corresponding to the protruding threads of the edge for a fitted connection, or connected to the screw holes on the edge via a screw. The top plate is connected to the screw holes on the outlet chamber via a screw, and the outlet pipe is connected to the outlet. Its beneficial effects are:

[0008] After the tubular filter membrane element with built-in hollow fiber membrane filaments of this invention has been running for a period of time, when the inside of the membrane housing becomes clogged, the screw on the top plate can be removed, the filter membrane unit inside the membrane housing can be disassembled for cleaning, and then reinstalled after cleaning. The cleaning operation is simple and convenient. Attached Figure Description

[0009] The tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1 This is a schematic diagram of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention.

[0011] Figure 2 This is a schematic diagram of the connector and the front of the outlet chamber of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention.

[0012] Figure 3 This is a schematic diagram showing the connector, top plate, and side cross-section of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention.

[0013] Figure 4 This is a schematic diagram of the filter membrane unit of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention.

[0014] Figure 5 This is a schematic diagram of the operating state of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention. The front wall of the sewage tank and the clear water tank has been removed from the figure.

[0015] Figure 6This is a schematic diagram of an existing external tubular filter membrane element, with the membrane housing portion on the front side removed.

[0016] In the diagram, 1 is a straight pipe, 2 is a hollow fiber membrane filament, 3 is an outlet pipe, 4 is an outlet, 5 is a top plate, 6 is a connector, 7 is a screw, 8 is an outlet chamber, 9 is a large-diameter filter membrane, 10 is an end cap, 11 is a support, 12 is a front circulation pipe, 13 is a circulating water pump, 14 is a wastewater tank, 15 is a product water pipe, 16 is a product water pump, 17 is a clear water tank, 18 is a rear circulation pipe, 19 is a screw hole, 20 is a side platform, and 21 is a through hole. Detailed Implementation

[0017] The structure and features of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention are described in detail below with reference to the accompanying drawings:

[0018] Tubular filter membrane elements with built-in hollow fiber membrane filaments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: Its structure includes a filter membrane unit, a membrane housing, and a top plate. The filter membrane unit includes hollow fiber membrane filaments and an outlet chamber. The outlet chamber is located at both ends of the hollow fiber membrane filaments, with a cavity in the middle. The outlet is located on the side of the outlet chamber and connects to the cavity. The cavity inside the hollow fiber membrane filament tube connects to the cavity of the outlet chamber. A screw hole is provided on the outward side of the outlet chamber. The filter membrane unit is located inside the membrane housing. The middle part of the membrane housing is a straight tube, and the two ends are provided with connectors with a diameter 50 mm to 100 mm larger than the middle straight tube. The outlet pipe is... Placed on the connector head, a 10-50 mm high protruding side platform is provided 10 mm to 50 mm inward from the inner edge of the connector head. The side platform has concave and convex threads or screw holes on the outward side. The top plate has through holes and screw holes, located on the inner side of the connector head edge and the outer side of the side platform. The side facing the side platform has concave and convex threads that correspond to the concave and convex threads of the side platform for fitting and connection, or connected to the screw holes on the side platform through a screw rod. The top plate is connected to the screw holes on the water outlet chamber through a screw rod, and the water outlet pipe is connected to the water outlet.

[0019] The principle and operation of the tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention will be described in detail below with reference to the accompanying drawings:

[0020] The tubular filter membrane element with built-in hollow fiber membrane filaments of the present invention is mounted on a support, such as... Figure 5As shown; the system connects to the circulating water pump and sewage tank via a pre-circulation pipe, and the outlet pipe connects to the inlet of the permeate pump via a permeate pipe. The outlet of the permeate pump connects to the clear water tank via a pipe. When the circulating water pump is turned on, sewage from the sewage tank enters the pre-circulation pipe and connector. The sewage flows through the through-holes in the top plate, the gap between the outlet chamber and the membrane housing, and enters the membrane housing, contacting the hollow fiber membrane fibers. Then, the permeate pump is turned on again, and negative pressure suction forces the sewage in the membrane housing through the hollow fiber membrane fibers. Pollutants are trapped on the outside of the membrane fibers, while clear water enters the cavity of the membrane fibers, enters the outlet chamber, and then enters the clear water tank via the outlet pipe, permeate pump, and permeate pipe. The sewage in the membrane housing returns to the sewage tank via the rear circulation pipe. Since the hollow fiber membrane fibers have the same pore size range as the large-diameter filter membrane, generally between 0.02 and 0.4 micrometers, but the diameter of the membrane fibers is smaller than that of the large-diameter filter membrane, generally between 1 and 5 millimeters, it can achieve the same treatment effect as the large-diameter filter membrane.

[0021] When the filter membrane unit inside the membrane housing becomes clogged, stop operation, disconnect the tubular filter membrane element with built-in hollow fiber membrane filaments from the connected pipe, remove the screw on the top plate to separate it from the membrane housing, then remove the filter membrane unit from the membrane housing, rinse the inside of the membrane housing and the hollow fiber membrane filaments with water, and then regenerate and clean the hollow fiber membrane filaments with acidic or alkaline agents. After cleaning, reinstall the filter membrane unit into the membrane housing, reinstall the top plate in its original position, tighten the screw, and then reconnect the membrane housing to the pipe to continue operation.

[0022] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tubular filter membrane element with built-in hollow fiber membrane filaments, which is an improvement on external tubular filter membrane elements, mainly composed of filter membrane units and membrane shells; characterized in that: Its structure includes a filter membrane unit, a membrane housing, and a top plate. The filter membrane unit includes hollow fiber membrane filaments and an outlet chamber. The outlet chamber is located at both ends of the hollow fiber membrane filaments, with a cavity in the middle. The outlet is located on the side of the outlet chamber and connects to the cavity. The cavity inside the hollow fiber membrane filament tube connects to the cavity of the outlet chamber. A screw hole is provided on the outward-facing side of the outlet chamber. The filter membrane unit is located inside the membrane housing. The middle part of the membrane housing is a straight tube, and both ends are provided with connectors with a diameter 50 mm to 100 mm larger than the middle straight tube. The outlet pipe is located at... On the connector head, a 10-50 mm high protruding edge is provided 10-50 mm inward from the inner edge of the connector head. The outer side of the edge has a grooved or threaded groove or screw hole. The top plate has a through hole and screw hole, located on the inner side of the connector head edge and the outer side of the edge. The side facing the edge has a grooved or threaded groove that corresponds to the grooved or threaded groove of the edge for a fitting connection, or it can be connected to the screw hole on the edge through a screw. The top plate is connected to the screw hole on the water outlet chamber through a screw. The water outlet pipe is connected to the water outlet.

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