CN205269420U - Automatic back flush scraping tubular membrane filter equipment - Google Patents

Abstract

The utility model discloses an automatic backwash scraping tubular membrane filter device, which comprises a tubular membrane filter device, a scraping device and an automatic backwash device, and materials to be separated enter the tank body of the tubular membrane filter device through a feed port After being filtered by the tubular membrane element, the permeate flows out from the discharge port, and the retained material remains in the tank, and is discharged when it is concentrated to a certain concentration. During the working process of the device, the scraping device slides the tubular membrane up and down through the scraper The pollutants on the surface of the element are scraped and removed to prevent the clogging of the filter membrane, so that the efficiency of the membrane treatment will be higher, the cleaning frequency of the tubular membrane filtration device will be reduced, and the effect of water production and the flux of the device during operation will remain stable. When the tubular membrane element is seriously polluted and needs to be backwashed, the pollutants on the surface of the tubular membrane element can be quickly removed through the automatic backwashing device, which has a high degree of automation, improves production efficiency, and reduces the operating cost of the device.

Description

An automatic backwash scraping tube membrane filtration device

technical field

The utility model relates to a tubular membrane filtration device, which is mainly used in the separation, purification and concentration of materials, and is widely used in the fields of medicine, biology, food and beverage, papermaking, energy, petrochemical industry, reclaimed water reuse and the like.

Background technique

Membrane separation technology refers to the technology of separating the components in the mixture by using the selective permeability of the membrane under the action of driving force. Membrane separation technology is widely used in water supply and drainage, food and beverage, pharmaceutical, chemical and other fields. In today's human society vigorously advocating and effectively implementing the trend of energy saving, emission reduction and circular economy, the application of membrane technology in material separation and reclaimed water reuse will become more prominent.

Membrane separation can be divided into microfiltration, ultrafiltration, nanofiltration and reverse osmosis according to the size of cut material, and roughly divided into hollow fiber, tubular membrane, plate membrane and roll membrane according to the shape of membrane and membrane module. Tubular membranes are more and more popular because of their large pore size interception, large flux, anti-fouling, backwashing, and chemical cleaning of membrane materials and membrane structures.

The most critical factors affecting the operation of membrane separation systems are the inhibition of membrane fouling and how to clean membranes more effectively after fouling, especially when membrane separation is used in material separation, purification, concentration, and reclaimed water reuse in special industries. In the prior art, to remove suspended solids, colloids and other impurities in wastewater, methods such as dosing, sedimentation, multi-media filter, activated carbon filter, etc. are generally adopted before the membrane treatment device, while the tubular membrane filter device is used. The first few processing steps are omitted, the process is simple, the input cost is low, and the filtering effect is good. Tubular membrane filtration is generally divided into internal pressure type and external pressure type. The internal pressure type generally adopts cross-flow technology with a membrane surface velocity of 2-6m/s to prevent pollutants from depositing on the membrane surface and avoid membrane clogging, but the energy consumption is high; External pressure tubular membrane filtration adopts dead-end filtration technology, which has low energy consumption, but serious membrane fouling.

Patents CN200810028767.X and CN201420305115.7 disclose a tubular sewage microfiltration treatment equipment and a cross-flow tubular microfiltration solid-liquid separation system. The removal of pollutants in wastewater replaces the traditional methods of dosing, flocculation, and sedimentation; the latter can directly separate the solid-liquid of wastewater containing sludge particles, replacing the sedimentation tanks, multi-media filters, carbon Filters and ultrafiltration devices. It has the characteristics of simple process, small occupied area, small investment in equipment and low operating cost. CN201120242343 also discloses a long-flow tubular microfiltration membrane module.

Patents ZL03235053.8 and CN02278330 disclose an external pressure tubular microfiltration membrane water treatment device and a microporous membrane river water filter, both of which are mainly used in the field of municipal drinking water treatment, and the membrane apertures are relatively large. The structure is relatively simple; CN201410845569.8 discloses a purification device and method for intelligently filtering electroplating bath liquid, which is used in a single industry and is not suitable for the recycling needs of large flow, highly polluted materials and complex water quality.

The filtration method provided by the above patents is mainly used to separate particulate matter and colloids in water. For example, there are fibers and viscous pollutants in papermaking wastewater, viscose wastewater, and textile washing water. The membrane will be clogged in a short time, and the membrane flux will drop rapidly. Moreover, the membrane elements are not easy to clean and easy to clean. The fouling of the membrane causes the failure to be replaced, which increases the operating cost; at the same time, high-frequency backwashing affects production on the one hand, and consumes a lot of cleaning agent on the other hand, which also increases operating costs. There are also some materials or wastewater with a high tendency to scale. If the formation of scale nuclei is not prevented in time, the general backwash will lose its effect.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides an automatic backwashing scraping tubular membrane filtration device that can prevent the filter membrane from clogging and has a stable water flux, which can effectively improve production efficiency and reduce the cleaning frequency of the membrane filtration device .

The technical solution adopted by the utility model is mainly: an automatic backwash scraping tubular membrane filter device, including a tubular filter device, a scraper device and an automatic backwash device, the tubular filter device includes a tank body and Tubular membrane element, the tank body is provided with a fixed plate, the tank body is located on the upper and lower ends of the fixed plate and is provided with a discharge port and a feed port, the tubular membrane element is installed on the fixed plate, and the scraping device includes There is a driving mechanism and a scraper, the scraper is sleeved on the tubular membrane element, the scraper can be slidably connected to the outer wall of the tubular membrane element driven by the driving mechanism, and the automatic backwashing device includes a liquid storage A tank and a booster, the tank body is provided with a backwash inlet and an emptying outlet, and the booster is respectively connected to the liquid storage tank and the backwash inlet through a backwash pipeline.

As an improvement of the above technical solution, one end of the tubular membrane element is closed, and the other end is provided with a permeate outlet, the permeate outlet and the discharge port are located above the fixed plate, and the feed port is located below the fixed plate.

As a further improvement of the above technical solution, a scraper ring is provided at the connection between the scraper and the tubular membrane element, and the scraper ring is tightly sleeved on the outer wall of the rolled membrane.

Further, the scraper is provided with a plurality of hydrophobic holes.

Further, both ends of the scraper are provided with scraping glue, and the scraping glue abuts against the inner wall of the tank.

Further, the tank body includes a top plate, a side plate and a bottom plate, the driving mechanism passes through the bottom plate through a push rod and is connected to the scraper, and a sealing ring is provided between the bottom plate and the push rod.

Further, a bracket is also included, the bracket is installed at the lower end of the tank body, and the liquid storage tank and the driving mechanism are arranged in the inner space surrounded by the bracket.

Further, the backwashing pipeline is provided with an air inlet, and the top plate of the tank is provided with an exhaust valve.

Further, the liquid storage tank is connected to the discharge port through the feed pipeline, the liquid storage tank is provided with a discharge port, and the backwash pipeline is provided with a branch pipe on the output side of the booster device, and the branch pipe is connected to the liquid storage tank connect.

Further, the liquid storage tank is provided with a water filling port and a first chemical feeding port, and the backwashing pipeline is provided with a filter and a second chemical feeding port.

The beneficial effects of the utility model are:

An automatic backwash scraping tubular membrane filter device of the utility model comprises a tubular membrane filter device, a scraper device and an automatic backwash device, the material to be separated enters the tank body of the tubular membrane filter device through the feed port, After being filtered by the tubular membrane element, the permeate flows out from the discharge port, and the retained material remains in the tank, and is discharged when concentrated to a certain concentration. During the working process of the device, the scraping device slides the tubular membrane element up and down through the scraper The pollutants on the surface are scraped and removed to prevent the clogging of the filter membrane, so that the efficiency of the membrane treatment will be higher, the cleaning frequency of the tubular membrane filtration device will be reduced, and the effect of water production and the flux of the device during operation will remain stable. When the pollution of the tubular membrane element is serious and backwashing is required, the pollutants on the surface of the tubular membrane element can be quickly removed through the automatic backwashing device, which has a high degree of automation, improves the production efficiency, and reduces the operating cost of the device.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Figures 2 to 4 are schematic diagrams of three styles of scraping rings.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Referring to Fig. 1 to Fig. 4, a kind of automatic backwash scraping tubular membrane filtration device of the present utility model comprises tubular membrane filtration device 1, scraping device 2 and automatic backwashing device 3, and described tubular membrane filtration device 1. It includes a tank body 11 and a tubular membrane element 12. One or more tubular membrane elements 12 can be provided. The tank body 11 is provided with a fixing plate 13, and the tank body 11 is located at the upper and lower ends of the fixing plate 13. The discharge port 15 and the feed port 14, the tubular membrane element 12 is installed on the fixed plate 13, the scraping device 2 includes a driving mechanism 21 and a scraper 22, and the scraper 22 is sleeved on the tubular membrane element. On the membrane element 12, the scraper 22 can be slidably connected to the outer wall of the tubular membrane element 12 driven by the driving mechanism 21. The automatic backwashing device 3 includes a liquid storage tank 31 and a booster 32, and the booster 32 is preferably a booster pump. The tank body 11 is provided with a backwash inlet 111 and an emptying outlet 112. The booster device 32 is connected to the liquid storage tank 31 and the backwash inlet 111 through a backwash pipeline 33, respectively. The material to be separated enters the tank body 11 of the tubular membrane filtration device 1 through the feed port 14, and after being filtered by the tubular membrane element 12, the permeate flows out from the discharge port 15, and the retained material remains in the tank body 11 and is concentrated to It is discharged at a certain concentration. During the working process of the device, the scraping device 2 scrapes and removes the pollutants on the surface of the tubular membrane element 12 by sliding the scraper 22 up and down to prevent the filter membrane from being clogged, so that the efficiency of the membrane treatment will be higher. Reduce the cleaning frequency of the tubular membrane filtration device 1 to ensure that the water production effect and flux of the device are stable during operation. When the tubular membrane element 12 is seriously polluted and needs backwashing, the automatic backwashing device 3 can quickly remove The pollutants on the surface of the tubular membrane element 12 have a high degree of automation, which improves the production efficiency and reduces the operating cost of the device.

Specifically, one end of the tubular membrane element 12 is closed, and the other end is provided with a permeate outlet. The permeate outlet and the discharge port 15 are located above the fixed plate 13, and the feed port 14 is located below the fixed plate 13. The fixed plate 13 connects the tank The body 11 is divided into upper and lower parts, the lower part is the material area to be separated, and the upper part is the permeate area. The material to be separated enters from the feed port 14 below the fixed plate 13 and passes through the tube fixed on the fixed plate 13. Type membrane element 12 enters the permeate area after filtration, and finally discharges from the discharge port 15.

In the utility model, in order to scrape off pollutants better, a scraper ring 221 is provided at the joint between the scraper 22 and the tubular membrane element 12, and the scraper ring 221 is tightly sleeved on the outer wall of the tubular membrane element 12, and the scraper ring 221 The material is preferably elastic plastics and rubber materials, so that it can scrape pollutants without damaging the tubular membrane element 12. The shape of the scraping ring 221 can be designed according to the actual situation. For example, its cross section can be triangular, trapezoidal, Circular or other shapes, the utility model is not limited thereto. At the same time, in order to better clean the inner wall of the tank body 11, the two ends of the scraper 22 are also provided with a scraper 222, which abuts against the inner wall of the tank body 11, and the material of the scraper 222 is preferably elastic plastic or rubber material. The scraper 22 is also provided with a plurality of hydrophobic holes 223, the scraper 22 moves up and down under the drive of the driving mechanism 21, and the material passes through the scraper 22 through the hydrophobic holes 223 to reduce the resistance of the scraper 22, and the scraper 22 drives The scraping ring 221 and the scraping rubber 222 respectively scrape the outer wall of the tubular membrane element 12 and the inner wall of the tank body 11 to remove pollutants, so as to avoid clogging of the filter membrane, reduce cleaning frequency, and improve production efficiency.

In the utility model, the tank body 11 includes a top plate, a side plate and a bottom plate. The driving mechanism 21 is connected with the scraper 22 through the push rod through the bottom plate. The tank body 11 will not leak liquid, and the driving mechanism 21 can be an air cylinder or an oil cylinder or other driving equipment, which can drive the scraper 22 to move up and down through a push rod.

The utility model also includes a bracket 4, the bracket 4 is installed at the lower end of the tank body 11, and the liquid storage tank 31 and the driving mechanism 21 are arranged in the inner space surrounded by the bracket 4, so that the structure of the device is more compact, and the occupied area of the device is reduced. At the same time, the bracket 4 also plays a protective role, preventing the liquid storage tank 31 and the driving mechanism 21 from being easily scratched by foreign objects.

In the automatic backwashing device 3, the backwashing pipeline 33 is provided with an air filling port 36, and the top plate of the tank body 11 is provided with an exhaust valve 113. During the backwashing process, the purified gas is added through the air filling port 36 for pressurization, and the cleaning effect is Even better, in order to avoid excessive pressure, the top plate is provided with an exhaust valve 113, which is a pressure-limiting exhaust valve. When the pressure exceeds the limit, the exhaust valve 113 is opened to ensure the safety of the device operation.

In this embodiment, the liquid storage tank 31 is connected to the discharge port 15 through the feed pipe, and the liquid storage tank 31 is provided with a discharge port, so that the device can use the permeate as the incoming material for the backwash cleaning liquid. 31 is provided with water inlet 37 and the first dosing inlet 38, and water inlet 37 can add clean water or pure water, backwash pipeline 33 is provided with filter 34 and the second dosing inlet 35, first, second dosing inlet 38 , 35 are used to add cleaning agent, filter 34 can filter out the particle impurities in the cleaning liquid, backwash pipeline 33 is located at the side of the output end of pressurization device 32 and is provided with branch pipe, and branch pipe is connected with liquid storage tank 31 to form a circuit, through branch pipe The cleaning liquid in the liquid storage tank 31 can be transported back and forth through the pressurization device 32, so as to stir it evenly and improve the cleaning effect. The outlet of the passing liquid enters to backwash the filter membrane, and then is discharged through the exhaust outlet 112 . Cleaning agents include acids, alkalis, surfactants, oxidizing agents, etc., and even separate liquids, mainly based on actual conditions. Among them, the acidic agent can remove the metal and hardness dirt accumulated on the surface of the membrane, the alkaline agent can remove silicon and some organic matter, and the surfactant and oxidant can promote it.

In this embodiment, the tubular membrane is a microfiltration membrane or an ultrafiltration membrane with a pore size of 0.02-20um, preferably 0.05-0.5um, and the specific type selection is based on actual needs.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model, as long as the technical solutions that achieve the purpose of the utility model by basically the same means all fall within the protection scope of the utility model.

Claims (10)

1. an automatic backwash scraping tubular membrane filter device, it is characterized in that: include tubular membrane filter device (1), scratch device (2) and automatic back-flushing device (3), described tubular membrane filter device (1) includes tank body (11) and tubular membrane element (12), fixing plate (13) it is provided with in described tank body (11), tank body (11) is positioned at fixing plate (13) and is provided with discharging opening (15) and charging aperture (14) in two ends up and down, described tubular membrane element (12) is arranged on fixing plate (13), described scratch device (2) includes driving mechanism (21) and scraper plate (22), described scraper plate (22) is socketed on tubular membrane element (12), described scraper plate (22) can drive lower slider to be connected on tubular membrane element (12) outer wall at driving mechanism (21), described automatic back-flushing device (3) includes reserving liquid tank (31) and pressurizer (32), tank body (11) is provided with backwash import (111) and emptying outlet (112), described pressurizer (32) is connected with reserving liquid tank (31) and backwash import (111) respectively by Backwash pipeline (33).

2. a kind of automatic backwash scraping tubular membrane filter device according to claim 1, it is characterized in that: described tubular membrane element (12) one end is closed, the other end is provided with permeate outlet, the outlet of described permeate and discharging opening (15) are positioned at fixing plate (13) top, and described charging aperture (14) is positioned at fixing plate (13) lower section.

3. a kind of automatic backwash scraping tubular membrane filter device according to claim 1, it is characterized in that: described scraper plate (22) and tubular membrane element (12) junction are provided with scrapes circle (221), described in scrape circle (221) and be tightly sleeved on tubular membrane element (12) outer wall.

4. a kind of automatic backwash scraping tubular membrane filter device according to claim 1, it is characterised in that: described scraper plate (22) is provided with multiple weep hole (223).

5. a kind of automatic backwash scraping tubular membrane filter device according to claim 3, it is characterised in that: described scraper plate (22) two ends are additionally provided with frictioning (222), and described frictioning (222) is connected on tank body (11) inwall.

6. a kind of automatic backwash scraping tubular membrane filter device according to claim 1, it is characterized in that: described tank body (11) includes top board, side plate and base plate, described driving mechanism (21) is connected with scraper plate (22) through base plate by push rod, is provided with sealing ring between described base plate and push rod.

7. a kind of automatic backwash scraping tubular membrane filter device according to claim 1, it is characterized in that: also include support (4), described support (4) is installed on tank body (11) lower end, described fluid reservoir (31) and driving mechanism (21) and is arranged at the inner space that support (4) surrounds.

8. a kind of automatic backwash scraping tubular membrane filter device according to claim 6, it is characterised in that: described Backwash pipeline (33) is provided with and adds QI KOU (36), and the top board of described tank body (11) is provided with air bleeding valve (113).

9. a kind of automatic backwash scraping tubular membrane filter device according to claim 1, it is characterized in that: described reserving liquid tank (31) is connected with discharging opening (15) by feed pipe, reserving liquid tank (31) is provided with discharge gate, described Backwash pipeline (33) is positioned at pressurizer (32) outfan side and is provided with arm, and described arm is connected with reserving liquid tank (31).

10. a kind of automatic backwash scraping tubular membrane filter device according to claim 9, it is characterized in that: described reserving liquid tank (31) is provided with filler (37) and the first dosing mouth (38), described Backwash pipeline (33) is provided with filter (34) and the second dosing mouth (35).