CN210302558U - Jet pulse stirring mechanism of shallow sand filter and shallow sand filter - Google Patents

Abstract

The utility model discloses a jet pulse rabbling mechanism in shallow sand filter, include: the backwashing pump is arranged in the clear water well, the backwashing pump is communicated with the bottom of the shallow sand filter through a backwashing water pipe provided with a backwashing water inlet valve, and an air interlayer is arranged in a pool bottom water collecting and distributing system at the bottom of the shallow sand filter and the upper space of the clear water layer. Correspondingly, the application provides a shallow sand filter. The utility model discloses utilize the backwash pump to push into bottom of the pool water collection and distribution system with the air intermediate layer, then spill over from the filter medium surface, can destroy the filter membrane on filter medium surface, make the sand bed seethe not hard up, the air passes the sand bed and escapes from its upper surface, and the sand bed is seeked not hard up the normal filtration time of extension promptly like this, improves the solid load of shallow filter bed, optimizes operating pressure.

Description

Jet pulse stirring mechanism of shallow sand filter and shallow sand filter

Technical Field

The utility model belongs to the process among the sewage treatment technology shallow sand filter especially relates to a shallow sand filter that adapts to sewage advanced treatment, reclaimed water retrieval and utilization, concretely relates to jet pulse rabbling mechanism and shallow sand filter in shallow sand filter.

Background

The sand filtration is a common process method in advanced treatment process and reclaimed water recycling process of sewage treatment, but the domestic shallow sand filtration is still few, when the shallow sand filtration is carried out, after the filtration is carried out for a period of time, a layer of filter membrane can be formed on the surface of a filter medium, the filtration speed can be slowed down, the liquid level in a tank can gradually rise, and the filtration is influenced.

Disclosure of Invention

To the technical problem who exists among the above-mentioned prior art, the utility model aims at providing a jet pulse rabbling mechanism and shallow sand filter in shallow sand filter.

In order to realize the utility model discloses a purpose, the utility model provides a jet pulse rabbling mechanism in shallow sand filter, include: the backwashing pump is arranged in the clear water well, the backwashing pump is communicated with the bottom of the shallow sand filter through a backwashing water pipe provided with a backwashing water inlet valve, and an air interlayer is arranged in a pool bottom water collecting and distributing system at the bottom of the shallow sand filter and the upper space of the clear water layer.

Wherein, be provided with the air pipe in the air intermediate layer and communicate with top atmosphere.

Wherein, be provided with level sensor in the shallow sand filter, level sensor and backwash pump all are connected with the PLC controller.

Correspondingly, the application provides a shallow sand filter, which comprises the jet flow pulse stirring mechanism of the shallow sand filter.

Compared with the prior art, the beneficial effects of the utility model are that, utilize the backwash pump to push into bottom of the pool water collecting and distributing system with the air interlayer, then spill over from the filter medium surface, can destroy the filter membrane on filter medium surface, make the sand bed tumble not hard up, the air passes the sand bed and overflows from its upper surface, and the sand bed is tumbled not hard up extension normal filter time by tumbling like this, improves the solid load of shallow filter bed, optimizes operating pressure.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a schematic diagram illustrating a jet pulse stirring process according to the present application;

in the figure, 1-a shallow sand filter, 2-an air pipe, 3-a water inlet valve, 4-a backwash water discharge well, 5-a liquid level sensor, 6-a pool bottom water collection and distribution system, 7-a filter medium, 8-an air interlayer, 9-a pool bottom water collection channel, 10-a clean water well, 11-a backwash water inlet valve, 12-a backwash pump and 13-a backwash water pipe.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that "connected" and words used in this application to express "connected," such as "connected," "connected," and the like, include both direct connection of one element to another element and connection of one element to another element through another element.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one component or module or feature to another component or module or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the component or module in use or operation in addition to the orientation depicted in the figures. For example, if a component or module in the figures is turned over, components or modules described as "above" or "above" other components or modules or configurations would then be oriented "below" or "beneath" the other components or modules or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The components or modules may also be oriented in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1-2, the present application provides a jet pulse stirring mechanism for a shallow sand filter, comprising: the backwashing water collection and distribution system comprises a backwashing pump 12 arranged in a clear water well, wherein the backwashing pump 12 is communicated with the bottom of the shallow sand filter 1 through a backwashing water pipe 13 provided with a backwashing water inlet valve 11, an air interlayer 8 is arranged in a pool bottom water collection and distribution system 6 at the bottom of the shallow sand filter 1 and a clear water layer upper space, a filter medium 7 is arranged above the pool bottom water collection and distribution system 6, and a backwashing water discharge well 4 and a clear water well 10 are arranged below the shallow sand filter 1.

Wherein, be provided with air pipe 2 in the air intermediate layer 8 and top atmosphere intercommunication.

Wherein, be provided with level sensor 5 in the shallow sand filter 1, level sensor 5 and backwash pump 12 all are connected with the PLC controller.

Correspondingly, the shallow sand filter comprises the jet pulse stirring mechanism of the shallow sand filter.

The working process is as follows: the air interlayer which is naturally introduced and comes from the atmosphere is filled in the cavity between the bottom of the pool bottom water collecting and distributing system 6 and the clear water layer. When the pulse cleaning is started, the back-flushing pump is started firstly, so that the water pressure in the pool bottom presses the air filled in the cavity to the pool bottom water collecting and distributing system, the air is quickly distributed by the water collecting and distributing system and then passes through the sand layer and just escapes from the upper surface of the sand layer, so that the sand layer is overturned and loosened, the sludge deposited on the surface of the sand layer migrates to two directions, part of the sludge is pushed back to the water layer, and part of the sludge is slightly submerged into the top sand layer from the surface layer and is stored in the top sand layer, so that the upper-layer sludge cake is damaged, the water head system loss caused by the sludge cake is reduced, and the filtering process is prolonged.

The lower end of an air pipe communicated with the atmosphere is fixed in a lower frame of a pool bottom water collecting and distributing system, the tail end of the air pipe is provided with a tee joint, the direction of an air port is horizontal, when pulse stirring is carried out, water pushes an air layer to move upwards, the bottom of the air pipe tee joint is opposite to air, a small part of air enters the air pipe from two sides of the tee joint to escape, the water collecting and distributing system is glued and sealed except for water distributing small holes, so that the upward moving air can uniformly overflow from the surface of a sand layer, meanwhile, the pulse stirring time is very short, one air stops immediately, the water continues to flow downwards, the air pipe is communicated with the atmosphere, and an.

The start and stop of the jet pulse stirring mechanism are automatically controlled and automatically operated by a liquid level sensor. When jet pulse stirring, still can carry out normal filtration, improve and produce water efficiency. The jet pulse agitation regains the filter head again through the destruction of the mudcake layer. In order to ensure the effluent quality and also ensure that the sand layer can be thoroughly cleaned during backwashing, jet pulse stirring is controlled for 6-12 times between two backwashing processes. The jet pulse stirring ingeniously utilizes the water layer on the upper part of the sand layer and the sand layer on the top part of the sand layer as a sewage containing space, thereby improving the sewage containing capacity of the filter bed, prolonging the filtering period, improving the water yield and reducing the self-consumption water.

The bottom of pool collection water distribution system in this application is the structure among the prior art, and its structure can refer to, application number: 201320599415.6, filing date: 2013-09-26, and an underdrain system of a shallow sand filter.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (4)

1. The utility model provides a jet pulse rabbling mechanism of shallow sand filter which characterized in that includes: the backwashing water pump (12) is arranged in the clear water well, the backwashing pump (12) is communicated with the bottom of the shallow sand filter (1) through a backwashing water pipe (13) provided with a backwashing water inlet valve (11), and an air interlayer (8) is arranged in a pool bottom water collecting and distributing system (6) at the bottom of the shallow sand filter (1) and a clear water layer upper space.

2. The jet flow pulse stirring mechanism of the shallow sand filter tank as claimed in claim 1, wherein an air pipe (2) is arranged in the air interlayer (8) and is communicated with the top atmosphere.

3. The jet flow pulse stirring mechanism of the shallow sand filter tank as claimed in claim 1, wherein a liquid level sensor (5) is arranged in the shallow sand filter tank (1), and the liquid level sensor (5) and the backwashing pump (12) are both connected with a PLC controller.

4. A shallow sand filter comprising the jet pulse stirring mechanism of the shallow sand filter according to claim 1.

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