CN101670240B - Filtering tank - Google Patents

Abstract

The invention discloses a filter tank, which comprises a shell, a filter element arranged in the shell, an upper cover arranged at the top of the shell and support legs arranged at the bottom of the shell, wherein the upper side and the lower side of the shell are respectively provided with a water outlet and a water inlet which are communicated with the filter element; the invention can carry out back flushing on the filtering membrane of the filter element while filtering, and can greatly improve the filtering efficiency.

Description

a filter tank

technical field

The invention belongs to the field of drainage, and is an automatic water treatment device for quickly and effectively removing impurities in water, in particular to a fully automatic filter tank for treating industrial and domestic water, improving water quality and preventing secondary pollution.

Background technique

Water is a precious natural resource. With the rapid development of industry and agriculture in our country, water resources have been used unrestrainedly, resulting in a large amount of domestic and industrial sewage, which is finally discharged into natural water bodies, forming a vicious circle and seriously endangering human health. The natural environment, and have adverse effects on human health, the protection of water resources is urgent. At present, with the continuous advancement of technology, China has also made great progress in water treatment, including the introduction of technical cooperation from Japan, Germany, the United States and other countries, which is of great help to China's water treatment. Currently, membrane treatment has achieved Large practical space and achievements, including fine filtration membranes, ultrafiltration membranes, nanofiltration membranes, advanced RO ion membranes and domestic sewage MBR membranes, etc. Their common feature is to intercept water objects through the micropores on the membrane, Water is treated in such a way that only water molecules can pass through it. The membrane is widely used because of its acid and alkali resistance and high precision. Although the membrane has the above-mentioned advantages that it can be used to filter industrial and domestic sewage, there are still many problems. We know that the membrane is treated by micropore interception, but the pores will eventually be blocked, and cleaning the membrane becomes the user's responsibility. biggest problem. Although the manufacturers of filter equipment advertise that the membrane can be cleaned by backwashing or adding chemicals, the actual effect is not ideal, because no one has the same water discharge, and the discharge standards are different every day, resulting in It is difficult to grasp the starting point of cleaning. Once the starting point of cleaning is passed, it will cause serious blockage. At this time, the difficulty of backwashing will increase, the cleaning cost will inevitably increase, and even cause problems such as membrane burst. It will cause secondary pollution, which is contrary to the theme of environmental protection. However, once the membrane bursts, it will cost a lot to replace it. For many companies, it is a decoration that many companies can afford but cannot afford.

Contents of the invention

The technical problem to be solved by the present invention is to provide a filter tank that backwashes the filter element while filtering, thereby greatly improving the filtering efficiency.

The technical solution adopted by the present invention to solve the technical problem is: a filter tank, including a shell, a filter element installed in the shell, an upper cover set on the top of the shell and a foot set on the bottom of the shell, the shell The upper side and the lower side are respectively provided with a water outlet hole and a water inlet hole connected with the filter element. The filter element described above includes a bracket, a cleaning pipe wound on the bracket, and two water outlet pipes. The cleaning pipe and the water outlet pipe are respectively connected with the cleaning hole and the water outlet hole. A vertical filter membrane is arranged on the outside of the bracket. The two ends of the microtubes are connected to the filter tube, and the filter tube is connected to the outlet pipe. The microtubes are provided with regular or irregular micropores. The water spray pipe is full of water spray holes, and the water spray pipe is communicated with the cleaning pipe.

Wherein, the water spray pipes on the front side and the rear side of the filter membrane are respectively arranged horizontally and vertically. There are multiple horizontally arranged water spray pipes arranged in parallel, and water diversion pipes are respectively connected at both ends of the head and tail to form a layer of water spray pipe network. The multi-layer water spray pipe network is arranged in parallel on the support from top to bottom. Both ends are connected to the cleaning pipe through a hose.

In addition, the outlet pipe is covered with a permanent magnet. The support is composed of two corresponding stainless steel plates on both sides, and the two stainless steel plates are respectively connected with the positive pole and the negative pole of the power supply outside the casing. The stainless steel plate is a stainless steel plate.

The beneficial effects of the present invention are: when the filter tank is working, the raw water enters the casing, enters the microtube from the micropore of the filter membrane under the action of water pressure, passes through the filter tube and the water outlet pipe in turn, and then discharges from the two water outlet holes to complete the filtration. When two similar filter tanks are connected together, one water outlet hole can be discharged to the main water outlet, and the other water outlet hole can enter the cleaning hole of the second filter tank and then enter the cleaning pipe. The water is sprayed out to clean the front and rear outer surfaces of the filter membrane. Furthermore, the water discharged to the main water outlet can also be returned to the filter tank through its outlet hole. Holes are discharged to complete the internal cleaning of the filter membrane, so that the filter membrane of the filter element can be backwashed while filtering, thereby greatly improving the filtration efficiency of the filter tank.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of filter element of the present invention;

Fig. 3 is a schematic diagram of the side view direction of the filter element of the present invention.

Among them: 1. shell; 21. water spray pipe; 22. filter pipe; 23. filter membrane; 24. hose; 25. outlet pipe; 26. cleaning pipe; 27. water pipe; 28. stainless steel plate; 29. Side backwashing support plate; 3. Upper cover; 4. Leg; 5. Water outlet hole; 6. Water inlet hole; 8. Water pressure gauge; 82. Vacuum solenoid valve; 94. Sewage outlet;

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, Fig. 2 and Fig. 3, a filter tank includes a housing 1, a filter element installed in the housing 1, an upper cover 3 arranged on the top of the housing 1 and a foot provided at the bottom of the housing 1 4. The upper cover 3 is provided with a vent hole 96 and a water pressure gauge 8. The vent hole 96 is used to discharge gas when filling water in the filter tank, and inject gas when draining to prevent the formation of a vacuum in the filter tank. The vent hole 96 is A vacuum solenoid valve 82 is installed, and a water pressure gauge 8 is used to display the pressure in the filter tank. The upper side and the lower side of the housing 1 are respectively provided with two water outlet holes 5 and one water inlet hole 6 communicated with the filter element. The upper side of the housing 1 is provided with a cleaning hole, and the bottom of the housing 1 is provided with a sewage outlet 94. The filter element includes a support, a cleaning pipe 26 vertically wound on the support, and two outlet pipes 25. The cleaning pipe 26 and the water outlet pipe 25 communicate with the cleaning hole and the water outlet hole 5 respectively, and a vertical filter membrane 23 is arranged on the outside of the support, and the filter membrane 23 is made of a plurality of microtubes arranged side by side, and the two ends of the microtubes are connected to the filter tube 22, and the filter The pipe 22 is connected to the water outlet pipe 25, and the micropipe is provided with regular or irregular micropores, and the front and rear sides of the filter membrane 23 are provided with a plurality of water spray pipes 21 surrounded by water spray holes. The water pipe 21 communicates with the cleaning pipe 26, and the water spray pipes 21 on the front side and the rear side of the filter membrane 23 are respectively arranged horizontally and vertically, wherein the horizontally arranged water spray pipes 21 are arranged in parallel and have a plurality of heads and tails. Water diversion pipes 27 are respectively connected to form a layer of water spray pipe network. The multi-layer water spray pipe network is arranged in parallel on the support from top to bottom.

When the present invention works, the raw water enters the housing 1, enters the micropipe from the micropore of the filter membrane 23 under the action of water pressure, passes through the filter pipe 22 and the water outlet pipe 25 successively, and discharges from the two water outlet holes 5 to complete the filtration. , if two similar filter tanks are connected together, one water outlet hole 5 of the first filter tank can be discharged to the main water outlet, and the other water outlet hole 5 can enter the cleaning hole of the second filter tank for cleaning Pipe 26 is sprayed from the water spray hole of water spray pipe 21 to clean the front and back two outer surfaces of filter membrane 23, and further, the water discharged to the total water outlet can also be returned to the filter tank through its water outlet hole 5, After the water enters the water outlet pipe 25 and the filter pipe 22 successively, it is discharged from the micropores of the filter membrane 23, and the internal cleaning of the filter membrane 23 is completed. Filtration efficiency.

Further, the outlet pipe 25 is covered with a permanent magnet, which can magnetize the water flowing through the outlet pipe 25 and reduce the COD and BOD contained in the outlet water.

Furthermore, the bracket is composed of two corresponding stainless steel plates 28 on both sides. The two stainless steel plates 28 are respectively connected to the positive and negative poles of the power supply outside the housing 1. After adding an appropriate amount of salt for electrolysis in the housing 1, the When the two stainless steel plates 28 are energized, an electrolytic reaction can be generated in the casing 1 to electrolytically clean the filter membrane 23, so as to improve the filtering effect and prevent pollution.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, as well as the partially used embodiments. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, some deformations and modifications can also be made. Improvements, these all belong to the protection scope of the present invention.

Claims (5)

1. A filter tank, including a shell (1), a filter element installed in the shell (1), an upper cover (3) set on the top of the shell (1) and a foot set on the bottom of the shell (1) (4), the upper side and the lower side of the housing (1) are respectively provided with a water outlet hole (5) and a water inlet hole (6) connected to the filter element, and the bottom end of the housing (1) is provided with a sewage outlet (94) , characterized in that: the upper side of the housing (1) is provided with a cleaning hole, the water outlet hole (5) has two, the filter element includes a bracket and a cleaning pipe (26) wound on the bracket and The two water outlet pipes (25), the cleaning pipe (26) and the water outlet pipe (25) communicate with the cleaning hole and the water outlet hole (5) respectively, and a vertical filter membrane (23) is arranged on the outside of the bracket, and the filter membrane (23) It is composed of multiple microtubes side by side, the two ends of the microtubes are connected to the filter tube (22), and the filter tube (22) is connected to the outlet pipe (25), and the microtubes are provided with regular or irregular micropores, The front and rear sides of the filter membrane (23) are provided with a plurality of water spray pipes (21) surrounded by water spray holes, and the water spray pipes (21) communicate with the cleaning pipe (26). 2. The filter tank according to claim 1, characterized in that the water spray pipes (21) on the front side and the rear side of the filter membrane (23) are respectively arranged horizontally and vertically. 3. A filter tank according to claim 2, characterized in that there are multiple horizontally arranged water spray pipes (21) arranged in parallel, and water diversion pipes (27) are connected to the first and last ends respectively to form a layer The water spray pipe network, the multi-layer water spray pipe network is arranged in parallel on the support from top to bottom, and the two ends of the water diversion pipe (27) are connected to the cleaning pipe (26) through the hose (24). 4. A filter tank according to claim 1, 2 or 3, characterized in that, the outlet pipe (25) is covered with a permanent magnet. 5. A filter tank according to claim 4, characterized in that, the bracket is composed of two stainless steel plates (28) corresponding to both sides, and the two stainless steel plates (28) are respectively connected to the outer shell (1) The positive and negative connections of the power supply.

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