CN212119268U - Front-end filtering system for domestic sewage treatment - Google Patents

Abstract

The utility model discloses a front-end filtering system for domestic sewage treatment, which comprises a first filtering device and a second filtering device, wherein the first filtering device is a slow-flow rough filtering device, the front end of the first filtering device is connected with the water outlet end of a sewage combined filter screen, the first filtering device comprises a plurality of filtering units, each filtering unit comprises an inclined plane which inclines downwards along the water flow direction, the bottom of the inclined plane is provided with an inwards-concave baffle plate, a filter stick can be detachably clamped in the baffle plate, and a water passing hole which is connected with the next filtering unit or flows out of the first filtering device is arranged in the middle of the baffle plate; the second filtering device is a filter box or a filter tank, the front end of the second filtering device is connected with the first filtering device, and the rear end of the second filtering device is connected with the microorganism treatment equipment. The utility model discloses system structure is compact, can effectively improve the front end treatment effect to domestic sewage, reduces microbial treatment equipment's treatment pressure to improve its treatment effect.

Description

Front-end filtering system for domestic sewage treatment

Technical Field

The utility model belongs to the waste water treatment field, more specifically say, involve a front end filtration system for domestic sewage treatment.

Background

Because domestic water resources are deficient and water pollution is more and more serious, the sewage treatment system is widely applied. The sewage treatment systems used for treating different kinds of sewage are different, so that the corresponding sewage treatment systems need to be designed according to the characteristics of various kinds of sewage.

Along with the improvement of the modernization degree and the acceleration of the urbanization process, the discharge amount of urban domestic sewage is rapidly increased, the pollution sources of the sewage are many, the discharge amount is large, more nitrogen and phosphorus elements are contained in a water body, and water eutrophication is easily caused. The existing mechanical filtration usually adopts a combined filter screen, although solid waste and large granular impurities can be removed, the treatment effect for removing particulate matters and suspended matters is poor, secondary treatment is required to be carried out on the filter material, the existing filter material treatment mode is a box structure with a flow channel, the filter material is fixedly arranged at the position of the flow channel in the box, when sewage flows through the filter material, the solid impurities in the water are adsorbed by the filter material to remove small granular impurities and suspended matters in the water, but the existing filter material treatment mode is too simple, the downward flow speed of the sewage under the action of gravity is higher, the time for passing through the filter material is too short, the filtration is insufficient, meanwhile, the filter material has certain service life, and needs to be cleaned periodically, the box needs to be opened in the cleaning process, a filter element needs to be detached, and if the cleaning frequency is too high, the working continuity and the working efficiency of the filter, and increases the use cost.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem of providing a front-end filtering system for domestic sewage treatment to solve the defects in the technical background.

The technical problem solved by the utility model is realized by adopting the following technical method:

a front-end filtering system for domestic sewage treatment comprises a first filtering device and a second filtering device, wherein the front end of the first filtering device is connected with a water outlet end of a sewage combined filter screen through a pipeline, the first filtering device is a slow-flow rough filtering device and comprises a plurality of filtering units, the filtering units are circularly arranged along a water flow direction, each filtering unit comprises an inclined plane which inclines downwards along the water flow direction, a baffle with an inner concave arc surface is arranged at the bottom of the inclined plane, the height of the baffle is greater than or equal to that of the inclined plane, a filter rod is detachably clamped in the baffle, and a water through hole which is connected with the next filtering unit or flows out of the first filtering device is arranged in the middle position of the baffle in the vertical direction; the second filtering device is a filtering box or a filtering tank, the front end of the second filtering device is connected with the first filtering device through a pipeline, and the rear end of the second filtering device is connected with microorganism treatment equipment in subsequent sewage treatment equipment through a pipeline.

As a further limitation, the flow velocity of the sewage entering the system on the surface of the first filtering device is 0.3-0.6 m/s.

As a further limitation, an included angle between the inclined plane arranged on the filtering unit and the horizontal plane is 17-25 degrees, and the projection length of the inclined plane of a single filtering unit on the horizontal plane is 30-60 cm.

And as further limitation, the filter stick is attached to the arc-shaped surface of the baffle, and a 3-4 mm water passing gap is reserved between the filter stick and the baffle.

As further limitation, the filter stick comprises a stick core, the two ends of the stick core are fixed on the inner side of the cambered surface of the baffle through detachable connecting pieces, and a fiber filter material is formed on the stick core and used as a packing material;

the detachable connecting piece is one of a threaded connecting piece, a buckling piece and a pin connecting piece;

the fiber filter material is one of coconut shell fiber, filter cotton, fibrilia and activated carbon fiber, and is sleeved on the rod core after being manufactured into a hollow cylinder structure.

By way of further limitation, the upper surface of the first filter device is an open surface and is closed at the open surface by a removable cover plate.

As a further limitation, a pressure increasing device is arranged on a water inlet pipeline connected with the second filtering device.

Has the advantages that: the utility model discloses a front end filtration system for domestic sewage treatment, through set up first filter equipment in front of second filter equipment's filter box or canister and carry out the slow flow filtration preliminary treatment, through carrying out the slow translation flow with the sewage that gets into the system on the filter unit, through circulating and setting up a plurality of filter units, improve the time of sewage in the dwell of filter rod, and can fully adsorb tiny particle impurity and part in the sewage, then carry out the processing of filter box or canister again, in order to improve the life of the filter media in filter box or canister;

the filter stick in the filtering unit can be directly disassembled and replaced in the purification process, normal sewage treatment is not affected, the efficiency of sewage treatment is improved, and the filter stick is very convenient and fast.

Drawings

Fig. 1 is a schematic diagram of a preferred embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the filter unit of fig. 1.

Wherein: 1. a water inlet flow channel; 2. a cover plate; 3. disassembling the buckle; 4. a filtration unit; 5. a filter unit mounting base; 6. a water outlet flow channel; 7. a buffer pool; 8. a water inlet pipeline; 9. a booster pump; 10. a second filtering device; 11. a backwashing device support; 12. a backwashing device; 13. filtering the material; 14. a tank body support; 15. a water outlet; 41. a bevel; 42. a fibrous filter material; 43. a rod core; 44. buckling; 45. water passing holes; 46. and a baffle plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Referring to fig. 1 and 2, in the present embodiment, the front-end filtering system for domestic sewage treatment is disposed behind the combined filter screen and in front of the microorganism treatment equipment, and comprises a first filtering device and a second filtering device 10, wherein the first filtering device comprises a filtering unit mounting base 5, the front end of the filtering unit mounting base 5 is connected with an inlet water channel 1, and is connected with an outlet water end of the combined filter screen through the inlet water channel 1, and four mounting positions are disposed on the filtering unit mounting base 5, and four filtering units 4 are sequentially mounted at the mounting positions.

In the present embodiment, the four filter units 4 mounted on the filter unit mounting base 5 have the same structure, and the structure is as shown in fig. 2, and includes an inclined plane 41, the included angle between the inclined plane 41 and the horizontal plane is 18 °, and the projection length of the inclined plane of the filter unit 4 on the horizontal plane is 50cm, the end of the inclined plane 41 is connected with a baffle 46, the height of the baffle 46 is greater than the height of the inclined plane 41, the baffle 46 has an arc inner surface, and a filter stick is disposed on the arc inner surface of the baffle 46, the filter stick includes a rod core 43, in the present embodiment, the rod core 43 is a mounting structure, the center thereof is opened with a through hole, the filter unit 4 is disposed with buckles 44 at two sides corresponding to the mounting position of the filter stick for clamping and fixing the rod core 43, the rod core 43 is sleeved with a fiber filter material 42 as a wrapping material, the fiber filter material 42 is a coconut shell fiber, and is made into a hollow cylinder structure and, the fiber filter 42 may be a consumable or may be recycled by washing, and in other embodiments, the fiber filter 42 may be formed by one of filter cotton, hemp fiber and activated carbon fiber. The fiber filter material 42 of the filter stick is of a cylindrical structure which is attached to the inner arc-shaped surface of the baffle 46, and a water passing gap of 3-4 mm is reserved between the fiber filter material 42 and the baffle 46. In addition, the baffle 46 is provided with water through holes 45 which are connected with the next filter unit 4 or flow out of the first filter device at the upper part of the middle position corresponding to the filter stick, namely, the water through holes 45 on the first three filter units 4 arranged along the water flow direction are connected with the next filter unit 4, and the water through holes 45 on the fourth filter unit 4 are connected with the water outlet flow channel 6 flowing out of the first filter device.

The upper surface of the filter unit mounting base 5 is an open surface, the cover plate 2 is arranged on the open surface, the cover plate 2 is detachably assembled on the surface of the filter unit mounting base 5 through the dismounting buckle 3, and the surface of the open surface of the upper surface is sealed to avoid the secondary pollution of the open environment to the water body.

The rear part of the water outlet flow passage 6 is connected with a buffer tank 7, the bottom of the buffer tank 7 is connected with a water inlet pipeline 8 connected with a second filtering device 10, in the embodiment, the second filtering device 10 is a gravity type filter tank, the lower part of the second filtering device is fixed in position through a tank body support 14, the water inlet end of the water inlet pipeline 8 is connected with the water inlet of the second filtering device 10, in order to ensure the water inlet amount, the treatment amount and the treatment efficiency, a booster pump 9 is also connected on the water inlet pipeline 8, the second filtering device 10 is filled with natural quartz sand as a filter material 13, the water inlet of the water inlet pipeline 8 intercepts macromolecular solid particles and colloid in the water through the natural quartz sand at the position of the filter material 13, and the clarified water is discharged from a water outlet 15 and is sent into a microorganism treatment device; in order to ensure the use effect and the service life of the second filtering device 10, a back washing device is connected to the back washing device support 10 in the second filtering device 10 to back wash and clean the filtered impurities in the natural quartz sand.

In this embodiment, the first filtering device is a slow-flow coarse filtering device, after passing through the combined filter screen, solid waste and large particle impurities are filtered out and then enter the first filtering device through the water inlet channel 1, the flow rate and the flow velocity of the inlet water on the inlet water channel 1 are controlled, so that the flow velocity of the sewage entering the system after passing through the filtering unit 4 on the first filtering device is 0.3-0.6 m/s, the sewage passes through the inclined surface 41 and is filtered by the fiber filtering material 42, a part of small particle impurities are filtered, after circulating on different filter units 4 for 4 times, the small particle impurities and part of suspended matters are intercepted by the fiber filter material 42, thereby effectively reducing the influence of the small particle impurities on the filtering effect of the second filtering device 10, and the workload of the second filter device 10 is reduced, the single service life of the second filter device is prolonged, and the backwashing cleaning of the backwashing device 12 and the replacement frequency of the filter material 13 are reduced. And because the filter unit 4 is provided with a plurality ofly on the rivers direction, and the filter rod as the filter media in every filter unit 4 is detachable construction, because can be polluted or directly replace filter unit 4 that corresponds when appearing great through resistance on the filter rod surface, only need during the replacement loosen buckle 44 replace can, also need not carry out the outage or dismantle the operation, therefore very convenient and fast, the practicality is better.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A front-end filtering system for domestic sewage treatment is characterized by comprising a first filtering device and a second filtering device, wherein the front end of the first filtering device is connected with a water outlet end of a sewage combined filter screen through a pipeline, the first filtering device is a slow-flow rough filtering device and comprises a plurality of filtering units, the filtering units are circularly arranged along a water flow direction, each filtering unit comprises an inclined plane which inclines downwards along the water flow direction, a baffle with an inner concave cambered surface is arranged at the bottom of the inclined plane, the height of the baffle is greater than or equal to that of the inclined plane, a filter stick is detachably clamped in the baffle, and a water through hole which is connected with the next filtering unit or flows out of the first filtering device is arranged in the middle position of the baffle in the vertical direction; the second filtering device is a filtering box or a filtering tank, the front end of the second filtering device is connected with the first filtering device through a pipeline, and the rear end of the second filtering device is connected with microorganism treatment equipment in subsequent sewage treatment equipment through a pipeline.

2. The front end filtration system for domestic sewage treatment according to claim 1, wherein the flow velocity of sewage entering the system over the surface of said first filtration device is 0.3-0.6 m/s.

3. The front-end filtering system for domestic sewage treatment according to claim 1, wherein the angle between the inclined plane provided on the filtering unit and the horizontal plane is 17-25 °, and the projection length of the inclined plane of a single filtering unit on the horizontal plane is 30-60 cm.

4. The front-end filtering system for domestic sewage treatment according to claim 1, wherein said filter stick is attached to the arc-shaped surface of said baffle, and a 3-4 mm water gap is left between said filter stick and said baffle.

5. The front-end filtration system for domestic sewage treatment according to claim 1, wherein the filter rod comprises a rod core, the rod core is fixed at both ends thereof to the inner side of the cambered surface of the baffle plate through detachable connecting pieces, and a fiber filter material is molded on the rod core as a packing material.

6. The front end filtration system for domestic sewage treatment of claim 5, wherein the detachable connection is one of a threaded connection, a snap connection, a pin connection.

7. The front-end filtration system for domestic sewage treatment according to claim 5, wherein the fiber filter material is one of coconut shell fiber, filter cotton, hemp fiber and activated carbon fiber, and the fiber filter material is made into a hollow cylinder structure and then is sleeved on the rod core.

8. The front end filter system for domestic sewage treatment according to claim 1, wherein the upper surface of said first filter means is an open face and is closed at the open face by a removable cover plate.

9. The front-end filtration system for domestic sewage treatment according to claim 1, wherein a pressure boosting device is provided on the water inlet line connecting the second filtration device.

Images