CN219539543U - Air floatation tank dissolved air water pump water inflow filter device - Google Patents

Abstract

The utility model discloses a water inlet filter device of a dissolved air pump of an air floatation tank, which comprises a dissolved air pump, wherein water inlet of the dissolved air pump is return water of the air floatation tank, the return water passes through a grading filter device, the grading filter device comprises a filter tank, a plurality of filter screens for filtering the return water are arranged in the filter tank, and the filter apertures of the filter screens are sequentially reduced along the water flow direction. According to the utility model, the filter tank is arranged at the water inlet of the dissolved air water pump, the reflux water grading filter device is arranged in the filter tank to filter sundries in the reflux water, so that the dissolved air water pump is not easy to be blocked by the sundries, the dissolved air water pump generates stable dissolved air water, the stable operation of the floatation tank is ensured, and the removal rate of SS is improved.

Description

Air floatation tank dissolved air water pump water inflow filter device

Technical Field

The utility model relates to the technical field, in particular to a water inlet filtering device of a dissolved air pump of an air floatation tank.

Background

The sewage discharged from the enterprise park has the characteristics of high SS, high oil content, high detergent, high organic pollutant and the like; the existing enterprise park is provided with a centralized sewage treatment plant for treating sewage of the enterprise park, the sewage of the enterprise park contains a plurality of flaky, filiform and blocky plastic impurities, and a large number of filiform and filiform plastic impurities still enter a sewage treatment system after passing through the coarse grille and the fine grille.

The air floatation tank of the sewage treatment system is an important unit for removing SS, the dissolved air water pump is an important component of the air floatation tank, the dissolved air water pump adopts the return water of the air floatation tank, the water cost can be saved, the design of an integral waterway is convenient, and the third section of the description of the CN 211546140U in the prior art is recorded: .. the existing air floatation tank lacks the effect of isolating slag carried in water flow in the air floatation tank, so that slag in the air floatation tank is mixed with water under pumping of a pump, partial separation cannot be realized, and the pump is easily blocked; utility model CN214495910U specification [ 13 ] section: .. the water inlet is filtered through the interception basket in the interception groove, so that suspended large particles in the wastewater can be filtered, and the large particles are prevented from entering the tank body, so that the blockage of the dissolved air tank, the water pump and the like is not easy to occur, and the problem of the blockage of the air floatation tank is solved to a certain extent.

When the existing dissolved air water pump is used, the impeller of the dissolved air water pump is frequently blocked under the influence of sundries carried in return water, so that the dissolved air effect of an air floatation tank is poor, the set SS removal rate cannot be achieved, and vicious circulation is carried out.

Disclosure of Invention

The utility model aims to provide a water inlet filter device of a dissolved air pump of an air floatation tank, which solves the problems that the dissolved air pump is easy to be blocked and the SS removal rate of the air floatation tank is low.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides an air supporting pond dissolves gas water pump filter equipment that intakes, includes and dissolves gas water pump, its characterized in that: the water inlet of the dissolved air water pump is return water of the air floatation tank, the return water passes through the grading filtering device, the grading filtering device comprises a filtering tank, a plurality of filtering screens used for filtering the return water are arranged in the filtering tank, and the filtering apertures of the filtering screens are sequentially reduced along the water flow direction.

As still further aspects of the utility model: the number of the filter screens is three, and the specifications of the filter pore diameters of the three filter screens are one-four meshes, four-ten meshes and eight-sixteen meshes respectively.

As still further aspects of the utility model: the filter screen is a mat woven screen, and the filter screen is made of 304 stainless steel.

As still further aspects of the utility model: the filter screen is installed on the filter screen rack, filter screen rack one end is the drive shaft, the drive shaft connection motor, the filter screen rack other end is connected with the pivot, the pivot both ends are connected with the gyro wheel respectively, the gyro wheel rolls along the spout when filter screen rack rotates.

As still further aspects of the utility model: an operation platform is arranged on one side of the filter tank, and a step is arranged on the operation platform.

The utility model has the beneficial effects that:

according to the utility model, the filter tank is arranged at the water inlet of the dissolved air water pump, the backflow water grading filter device is arranged in the filter tank, and impurities in the backflow water are filtered, so that the dissolved air water pump is not easy to be blocked by the impurities, the dissolved air water pump generates stable dissolved air water, the stable operation of the floatation tank is ensured, and the removal rate of SS is improved.

Drawings

FIG. 1 is a schematic diagram of the operation structure of an air floatation tank system;

FIG. 2 is a schematic view of the structure of the hierarchical filtering device of the present utility model in use;

FIG. 3 is a schematic view of the structure of the classifying filter device according to the present utility model when cleaning.

10. A hierarchical filtering device; 11. a filter tank; 111. an operating platform; 112. a step; 12. a filter screen; 13. a filter screen frame; 14. a drive shaft; 15. a motor; 16. a rotating shaft; 17. and a sliding groove.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

As shown in fig. 1-3, the utility model discloses a water inlet filtering device of a dissolved air pump of an air floatation tank, which comprises a dissolved air pump, wherein the water inlet of the dissolved air pump is the return water of the air floatation tank, and the return water passes through a grading filtering device 10; the classification filter device 10 comprises a filter tank 11, wherein the filter tank 11 is provided with a plurality of filter screens 12 for filtering backwater water, and the filter apertures of the filter screens 12 are sequentially reduced along the water flow direction.

The dissolved air water pump is an important device of the air floatation tank, the water requirement of the dissolved air water pump configured in the large-scale air floatation tank is large, the clean water is singly connected into the dissolved air water pump to be distributed, the running cost of the whole sewage treatment system can be increased, and the dissolved air water pump does not accord with the concept of recycling after sewage treatment.

The filter screen 12 is arranged in the filter tank 11 in a grading manner, so that the removal rate of sundries can be improved, sundries with different sizes can be effectively filtered, and the standard reaching rate of the filtered sundries is ensured; secondly, the sundry cleaning period can be prolonged, the sundry cleaning time can be saved, after the sundries are classified by the filter screens 12, the sundries are blocked by the filter screens 12 with different screen diameters respectively, the time that the filter screens 12 are blocked by the sundries is prolonged, and the cleaning frequency of the filter screens 12 is reduced; thirdly, can reduce equipment maintenance cost, set up multistage filter screen 12, filter screen 12 is difficult for being blocked up and damage, according to the running situation by personnel clear up impurity can, dissolved air water pump also is difficult for blocking up and leads to damaging, has reduced the whole maintenance rate of equipment, has reduced equipment maintenance cost.

Further, the multistage filter screen 12 can increase the filtering effect of the backwater water, but also can increase the cost of system operation and maintenance, preferably three filter screens 12 are sequentially arranged from large to small according to the water flow direction, the specifications of the filter apertures of the filter screens 12 are respectively one-four-mesh, ten-mesh and eight-mesh, sixteen-mesh, and the reasonable arrangement of the apertures of the filter screens 12 can improve the filtering efficiency and reduce the maintenance frequency.

Furthermore, the filter screen 12 adopts the mat-woven net, the mat-woven net has the advantages of low total cost and convenient maintenance and replacement, and the filter screen 12 is made of 304 stainless steel, so that the filter screen 12 is prevented from being corroded when being used for a long time.

Further, a power device is arranged on the filter screen 12, so that the filter screen 12 is convenient to clean and maintain. During cleaning and maintenance, the filter screen 12 is rotated to enable the filter screen 12 to be horizontally placed, impurities of the blocking net are conveniently cleaned, and preferably, the filter screen 12 is arranged on the filter screen frame 13, one end of the filter screen frame 13 is provided with a driving shaft 14, the driving shaft 14 is connected with a motor 15, the other end of the filter screen frame 13 is connected with a rotating shaft 16, two ends of the rotating shaft 16 are respectively connected with rollers (not shown), and the rollers roll along the sliding grooves 17 when the filter screen frame 13 rotates; the motor 15 may be a stepper motor 15.

Further, an operation platform 111 is installed on one side of the filter tank 11, and a step 112 is installed on the operation platform 111. The operation platform 111 is used for providing a site for manually cleaning the filter screen 12.

As shown in figure 1, coagulant, PH regulator and coagulant aid can be added into the return water while the removal rate of the floatation tank SS is improved and the normal operation of the dissolved air water pump is ensured. Coagulant, PH regulator and coagulant aid of the reflux water are injected from the lower part of the floatation tank, coagulant, PH regulator and coagulant aid added in the sewage pipe are injected from the upper part of the floatation tank, so that the coagulant, PH regulator and coagulant aid are distributed more uniformly in the floatation tank, and the removal rate of SS solid matters through floatation is higher.

The effect of installing a influent filter device on SS removal is verified in the following in the specific examples.

Examples:

the industrial park concentrates the sewage treatment plant, the sewage treatment capacity is 1.5 ten thousand tons/day, the effluent reaches the first grade A standard of GB18918-2002 of the discharge Standard of pollutants of urban sewage treatment plant, 3 dissolved air water pumps are installed in the floatation tank, 2 are opened during normal operation.

Before the water-soluble air pump enters the water filtering device, the blocking rate of each water-soluble air pump is 15 times/month on average, and the SS removal rate is shown in the following table:

TABLE 1 SS removal rate of dissolved air pump inlet filter device increased by the first 6 months

After the water inlet filter device of each dissolved air water pump is added, the blocking rate of each dissolved air water pump is 3 times/month on average, and the SS removal rate is shown in the following table:

TABLE 2 SS removal rate 6 months after the addition of the dissolved air pump water inlet filter

By comparing the data before and after the installation of the water inlet filter device of the dissolved air water pump, the water inlet filter device of the dissolved air water pump is increased, the blocking rate of the dissolved air water pump can be reduced, and the removal rate of the SS of the floatation tank is improved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Claims (5)

1. The utility model provides an air supporting pond dissolves gas water pump filter equipment that intakes, includes and dissolves gas water pump, its characterized in that: the water inlet of the dissolved air water pump is return water of an air floatation tank, the return water passes through a grading filter device (10), the grading filter device (10) comprises a filter tank (11), the filter tank (11) is provided with a plurality of filter screens (12) for filtering the return water, and the filter apertures of the filter screens (12) are sequentially reduced along the water flow direction.

2. The air floatation tank dissolved-air water pump water inlet filtering device according to claim 1, wherein: the number of the filter screens (12) is three, and the specifications of the filter pore diameters of the three filter screens (12) are one-four meshes, four-ten meshes and eight-sixteen meshes respectively.

3. The air floatation tank dissolved-air water pump water inlet filtering device according to claim 2, wherein: the filter screen (12) is a mat woven screen, and the filter screen (12) is made of 304 stainless steel.

4. The air floatation tank dissolved-air water pump water inlet filtering device according to claim 1, wherein: the filter screen (12) is installed on filter screen rack (13), filter screen rack (13) one end is drive shaft (14), motor (15) are connected to drive shaft (14), filter screen rack (13) other end is connected with pivot (16), pivot (16) both ends are connected with the gyro wheel respectively, gyro wheel rolls along spout (17) when filter screen rack (13) rotate.

5. The air floatation tank dissolved-air water pump water inlet filtering device according to claim 1, wherein: an operation platform (111) is arranged on one side of the filter tank (11), and a step (112) is arranged on the operation platform (111).