CN107082471B - A kind of ultrafiltration membrane filtration device for sewage - Google Patents

Abstract

The invention belongs to the technical field of sewage filtration devices, and discloses an ultrafiltration membrane filtration device for sewage. There are several through holes, and the outer wall of the aqueduct is sleeved with a plurality of ultrafiltration membranes, and the interior of the ultrafiltration membrane is communicated with the aqueduct through the through holes; The water inlet pipe is connected with a water pump, the water pump is connected with a pressure regulator, the drum is rotated and connected with a transmission device, the inner wall of the drum is provided with a number of grooves, and a pressure plate is provided between the drum and the water conduit. The problem that the two sides of the ultrafiltration membrane in the prior art are easy to adhere closely, resulting in poor filtration effect, is solved.

Description

A kind of ultrafiltration membrane filtration device for sewage

technical field

The invention belongs to the field of sewage filtering devices, in particular to an ultrafiltration membrane filtering device for sewage.

Background technique

Sewage treatment refers to the process of purifying sewage in order to make sewage meet the water quality requirements for drainage or reuse. It is widely used in various fields of construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical care, and catering. In the process of sewage treatment, the floating and suspended solid particles need to be filtered, and ultra-filtered water is currently commonly used. Ultrafiltration water is a membrane separation process based on the separation principle of sieving and pressure as the driving force. Ultrafiltration membrane is mainly used as a filtering tool. However, after the ultrafiltration membrane filters the sewage, impurities will remain on the filter holes, which will cause the filter holes to be blocked, making the sewage filtration effect poor.

Therefore, the Chinese patent with the patent publication number CN103877857B provides an ultrafiltration membrane filtration device, comprising a control box and a sampling box, a peristaltic pump and an air pump are arranged in the control box, and an ultrafiltration membrane sampling group is arranged in the sampling box, The ultrafiltration membrane sampling group includes a sampling tube, an ultrafiltration membrane and a pressure plate. The sampling tube is provided with sampling holes, and the ultrafiltration membranes are respectively arranged on both sides of the sampling tube. The edges of the two ultrafiltration membranes abut each other and seal, and the ultrafiltration membranes The membrane is communicated with the sampling tube through the sampling hole; one end of the sampling tube is communicated with the peristaltic pump; an air purging tube is arranged below the ultrafiltration membrane sampling group, and the air purging tube is provided with a purging hole, and one end of the air purging tube is connected with the peristaltic pump. Air pump connection. When the technical solution is used, sewage is added into the sampling box, the sewage is filtered through the ultrafiltration membrane, and the permeate enters the interior of the ultrafiltration membrane, and then enters the sampling tube through the sampling hole, and the peristaltic pump rotates to draw the permeate away; After filtration, the impurities remaining in the concentrate outside the ultrafiltration membrane will be adsorbed on the filter holes of the ultrafiltration membrane, blocking the filter holes. At this time, the peristaltic pump is reversed, and the peristaltic pump flushes water into the signal filter membrane. The ultrafiltration membrane is made to bulge, and then the air is blown into the air purging tube through the air pump, and then purging through the purging hole, so that the impurities on the surface of the ultrafiltration membrane fall off. In the technical solution, when the ultrafiltration membrane is cleaned, it is not necessary to remove the ultrafiltration membrane, and the ultrafiltration membrane can be directly cleaned, which reduces the labor intensity and has high cleaning efficiency.

However, the above technical solution still has the following technical problems: the ultrafiltration membrane is soft, and by filtering water from the outside to the inside, the ultrafiltration membrane will be squeezed, so that the two sides of the ultrafiltration membrane are close to each other, resulting in the effect of filtration. not good.

SUMMARY OF THE INVENTION

The present invention is intended to provide an ultrafiltration membrane filtration device for sewage, so as to solve the problem that the two sides of the ultrafiltration membrane in the prior art are easy to stick to each other, resulting in poor filtration effect.

In order to achieve the above purpose, the present invention provides the following technical solutions, an ultrafiltration membrane filtration device for sewage, comprising a water storage tank, a filter group is arranged in the water storage tank, the filter group includes a water conduit running through the water storage tank, and the pipe wall of the water conduit is provided with There are several through holes, and the outer wall of the aqueduct is sleeved with a plurality of ultrafiltration membranes, and the interior of the ultrafiltration membrane is communicated with the aqueduct through the through holes; one end of the aqueduct is connected with a water inlet pipe, and the other end of the aqueduct is rotatably connected with a roller The water inlet pipe is connected with a water pump, a pressure regulator is connected on the water pump, a transmission device is connected in rotation on the drum, a number of grooves are arranged on the inner wall of the drum, and a pressure plate is arranged between the drum and the water conduit.

The technical effects of the technical features of this solution: the water storage tank is used to collect filtered water; the filter group is used to filter the floating and suspended solid particles in the sewage; the aqueduct is used to conduct the sewage, and the through holes are used to guide the sewage into the ultrafiltration Inside the membrane; the pressure regulator is used to adjust the flow rate of the sewage; the sewage flows into the aqueduct through the water inlet pipe, and then enters the ultrafiltration membrane through the through hole. Under the action of water pressure, the ultrafiltration membrane filters the permeate to the outside, with The concentrated solution of impurities remains inside the ultrafiltration membrane. After a long time of filtration, impurities will remain on the filter holes of the ultrafiltration membrane, and the impurities will block the filter holes of the ultrafiltration membrane; at this time, stop adding water to the water inlet pipe. , so that the water in the water inlet pipe enters the ultrafiltration membrane at the bottom, all of which are filtered, and then fills the water inlet pipe with water at a high speed. The remaining impurities are washed away and then discharged into the drum. The rotation of the drum will generate centrifugal force. Since the mass of impurities per unit volume is greater than the mass of water, the impurities will rotate along the drum wall. When the impurities rotate into the grooves on the inner wall of the drum, they will stay in the grooves, and the remaining water will remain in the grooves. It will be spirally conveyed to the end of the drum for collection.

The technical principle of this scheme is: the sewage is introduced into the aqueduct by the water pump, and then enters the ultrafiltration membrane, and the sewage is filtered through the ultrafiltration membrane. At this time, increase the flow rate of water through the pressure regulator, so that the water enters the aqueduct at a high speed, and then enters the ultrafiltration membrane at a high speed through the through hole, flushes the ultrafiltration membrane, and then opens the pressure plate, so that the filtered The concentrated liquid and impurities are filled into the drum by water, and then the pressure plate is closed, and the transmission device drives the drum to rotate. Under the action of centrifugal force, the impurities enter the grooves on the inner wall of the drum, and the water moves to the end of the drum in a spiral shape.

The technical effects that this program can produce are:

1. The prior art filters through the water entering the ultrafiltration membrane from the outside to the inside, which can cause the two sides of the ultrafiltration membrane to be squeezed and adhered to each other, so that the filtering effect is not good. This technical scheme passes sewage from the ultrafiltration membrane. From the inside to the outside, during filtration, the ultrafiltration membrane is swollen and filtered, so that each filter hole on the ultrafiltration membrane can achieve the filtering effect, so that the filtering effect is good;

2. After filtering from the inside to the outside, impurities will remain inside the ultrafiltration membrane, which is not easy to discharge. By adding water to the water pump at high pressure into the water pipe, the water is sprayed into the ultrafiltration membrane from the through hole under high pressure, and the ultrafiltration membrane is injected into the ultrafiltration membrane at high pressure. The impurities on the filter pores in the filter membrane are washed, and the ultrafiltration membrane is cleaned;

3. After cleaning, the water with a large amount of impurities enters the drum, and the drum rotates. Since the mass of the impurities per unit volume is greater than the mass of the water, under the action of the centrifugal force of the drum, the impurities rotate along the drum wall, so when the impurities move to When in the groove, collect in the groove.

The following are the preferred solutions based on the above solutions:

Preferred solution 1: the ultrafiltration membrane is in a semi-circular shape, and the ultrafiltration membrane is located below the aqueduct. The sewage will move downward under the action of gravity, so the force of the sewage pressing the ultrafiltration membrane above the aqueduct is not strong enough, and it has no effect on the filtration of sewage. Setting the ultrafiltration membrane in a semi-circular shape can save costs.

Preferred solution 2: Based on the preferred solution 1, the water conduit is rotatably connected to the water storage tank. After the high-speed water washes the ultrafiltration membrane, the aqueduct is rotated, so that the washed water can quickly introduce impurities into the aqueduct, so as to realize the export of impurities in the ultrafiltration membrane.

Preferred solution 3: Based on the preferred solution 2, a sewage pipe is connected to the bottom of one side of the aqueduct, the sewage pipe is located on the side of the aqueduct with a pressure plate, and a control valve is connected to the sewage pipe. The sewage pipe can drain the residual concentrated liquid after filtration by the ultrafiltration membrane to avoid internal pollution of the water quality.

Preferred scheme 4: Based on preferred scheme 3, a bracket is provided below the drum, and the transmission device includes a gear, a ring gear meshed with the gear, and a motor mounted on the bracket, the gear is connected to the output shaft of the motor, and the ring gear is connected to the drum. External wall fixed connection. The drum is driven through the cooperation of the gear ring, the transmission is stable, the service life is long, and the work is safe.

Preferred solution 5: Based on the preferred solution 4, there are multiple filter groups, and the multiple filter groups are arranged side by side on the aqueduct. A large number of sewage filtration can be carried out at the same time to improve the efficiency of sewage filtration.

Description of drawings

FIG. 1 is a schematic structural diagram of an ultrafiltration membrane filtration device for sewage according to the present invention.

Detailed ways

The present invention is described in further detail below by specific embodiments:

The reference signs in the drawings include: water storage tank 1, filter group 2, water conduit 21, through hole 211, ultrafiltration membrane 22, sewage pipe 23, water inlet pipe 3, water pump 4, drum 5, groove 51, pressing plate 6. Bracket 7, motor 8, gear 9, ring gear 10.

As shown in FIG. 1 , an ultrafiltration membrane filtration device for sewage includes a water storage tank 1, and a filter group 2 is arranged in the water storage tank 1. The filter group 2 includes a water conduit 21 running through the left and right sides of the water storage tank 1. The water conduit 21 It is rotatably connected with the water storage tank 1, the bottom of the pipe wall of the water conduit 21 is provided with a through hole 211, the bottom of the water conduit 21 is connected with nine semi-circular ultrafiltration membranes 22, and the interior of the ultrafiltration membrane 22 passes through the through holes 211. Connected with the water conduit 21, the ultrafiltration membrane 22 can be superimposed according to the actual situation;

The left end of the water conduit 21 is rotatably connected with the drum 5, and a pressure plate 6 is arranged between the water conduit 21 and the drum 5, and a sewage pipe 23 is arranged below the left end of the The inner wall is provided with a number of grooves 51, the outer wall of the drum 5 is provided with a transmission device, the bottom of the drum 5 is provided with a bracket 7, the bracket 7 is provided with a motor 8, and the transmission device includes a gear 9 rotatably connected with the output shaft of the motor 8, And the ring gear 10 sleeved on the outside of the drum 5 and meshed with the gear 9, a common flat key is arranged between the gear 9 and the output shaft.

When using this embodiment, first, the sewage is extracted by the water pump 4, the sewage enters the aqueduct 21 through the water inlet pipe 3, and then enters the ultrafiltration membrane 22 through the through hole 211, and the ultrafiltration membrane 22 is squeezed by the action of water gravity, so that the ultrafiltration membrane 22 is squeezed. The ultrafiltration membrane 22 filters the sewage, the permeate enters the water storage tank 1 through the filter holes of the ultrafiltration membrane 22 , and the concentrated solution remains in the ultrafiltration membrane 22 and the water conduit 21 . If the ultrafiltration membrane 22 is used for a long time for filtration, impurities will remain on the filter holes, which will cause the filter holes of the ultrafiltration membrane 22 to be blocked, resulting in poor filtering effect. At this time, the water pump 4 is turned off, so that the water remaining in the water conduit 21 is filtered through the ultrafiltration membrane 22 , and then the control valve on the sewage pipe 23 is opened to discharge the residual concentrated solution in the water conduit 21 . Close the control valve, turn on the water pump 4, and adjust the flow rate of the water through the pressure regulator, so that the water enters the aqueduct 21 at a high speed, and then enters the ultrafiltration membrane 22 through the through hole 211 at a high speed. The impurities on the surface are washed, and then the water conduit 21 is rotated, so that the washed impurities in the ultrafiltration membrane 22 enter the water conduit 21, the pressing plate 6 is opened, and the impurities are washed into the drum 5 by water, and then the pressing plate 6 is closed. Start the motor 8, the motor 8 drives the gear 9 to rotate, the gear 9 drives the ring gear 10 to rotate, and the ring gear 10 drives the drum 5 to rotate. Since the weight of impurities per unit volume is greater than the weight of water, the centrifugal force of the rotation of the drum 5 will drive a large mass The impurities rotate along the cylinder wall of the drum 5. When the impurities move to the groove 51, they enter the groove 51 and are collected. The remaining water moves to the left in a spiral shape through the centrifugal force of the drum 5, and is carried out on the left side. Therefore, the impurities washed off on the ultrafiltration membrane 22 are collected.

For those skilled in the art, on the premise of not departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect and patentability of the implementation of the present invention. practicability.

Claims (5)

1. an ultrafiltration membrane filtration device for sewage, comprising a water storage tank, and being provided with a filter group in the water storage tank, it is characterized in that: the filter group comprises a water conduit running through the water storage tank, and the pipe wall of the water conduit is provided with some through holes, and The outer wall of the aqueduct is sleeved with a plurality of ultrafiltration membranes, and the interior of the ultrafiltration membrane is communicated with the aqueduct through through holes; one end of the aqueduct is connected with a water inlet pipe, and the other end of the The water pump is connected with a pressure regulator, the drum is rotatably connected with a transmission device, the inner wall of the drum is provided with a number of grooves, and a pressure plate is arranged between the drum and the water conduit; a bracket is arranged under the drum, and the transmission device includes gears, and A ring gear meshed with gears and a motor mounted on a bracket, the gear is connected with the output shaft of the motor, and the ring gear is fixedly connected with the outer wall of the drum. 2 . The ultrafiltration membrane filtration device for sewage according to claim 1 , wherein the ultrafiltration membrane is in a semi-circular shape, and the ultrafiltration membrane is located below the aqueduct. 3 . 3 . The ultrafiltration membrane filtration device for sewage according to claim 2 , wherein the water conduit is rotatably connected to the water storage tank. 4 . 4. A kind of ultrafiltration membrane filtration device for sewage according to claim 3, characterized in that: the bottom of one side of the aqueduct is connected with a sewage pipe, and the sewage pipe is located on the side where the pressure plate is arranged on the aqueduct, and the sewage discharges A control valve is connected to the pipe. 5 . The ultrafiltration membrane filtration device for sewage according to claim 4 , wherein there are multiple filter groups, and the multiple filter groups are arranged side by side on the water conduit. 6 .