CN117504382A - Filter tank and working method thereof - Google Patents

Abstract

The embodiment of the application provides a filter tank and a working method of the filter tank, wherein the filter tank comprises a water and gas distribution system; the water and gas distribution system comprises: the water and gas distribution system comprises a water and gas distribution channel, a first water and gas distribution pipe connected with the water and gas distribution channel, and a second water and gas distribution pipe connected with the first water and gas distribution pipe; the water and gas distribution channel is used for introducing flushing water and flushing gas and distributing the flushing water and the flushing gas, and the flushing water and the flushing gas distributed by the water and gas distribution channel are transmitted to the first water and gas distribution pipe; the first water and gas distribution pipe is used for transmitting flushing water and flushing gas distributed by the water and gas distribution channels to the second water and gas distribution pipe; the second water distribution gas pipe is used for redistributing the flushing water and the flushing gas transmitted by the first water distribution gas pipe, and the flushing water and the flushing gas redistributed by the second water distribution gas pipe are used for backwashing the filter tank. The embodiment of the application can simplify the structure of the water and gas distribution system in the filter tank, and provides possibility for convenient installation of the filter tank.

Description

Filter tank and working method thereof

Technical Field

The embodiment of the application relates to the field of water treatment and environmental engineering, in particular to a filter tank and a working method of the filter tank.

Background

The filter tank is used as a water treatment process, and can be used for filtering water to be filtered, such as raw water or wastewater, and the like, so as to remove suspended insoluble substances in the water to be filtered. In order to maintain the filter, the filter is required to be backwashed to remove suspended impurities accumulated in the filter, so that the filtering performance of the filter is ensured. Under the background, how to provide an improved filter tank so as to simplify related structures for backwashing in the filter tank, thereby providing possibility for convenient installation of the filter tank, and becoming a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of this, the embodiments of the present application provide a filter tank and a working method of the filter tank, so as to simplify a structure of a water and gas distribution system in the filter tank (the water and gas distribution system is a structure for distributing flushing water and flushing gas in the filter tank), and further provide a possibility for facilitating installation of the filter tank.

In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions.

In a first aspect, embodiments of the present application provide a filter tank, the filter tank including a water and gas distribution system; the water and gas distribution system comprises: the water and gas distribution system comprises a water and gas distribution channel, a first water and gas distribution pipe connected with the water and gas distribution channel, and a second water and gas distribution pipe connected with the first water and gas distribution pipe;

the water and gas distribution channels are used for introducing flushing water and flushing gas and distributing the flushing water and the flushing gas, and the flushing water and the flushing gas distributed by the water and gas distribution channels are transmitted to the first water and gas distribution pipe;

the first water and gas distribution pipe is used for transmitting flushing water and flushing gas distributed by the water and gas distribution channel to the second water and gas distribution pipe;

the second water distribution gas pipe is used for redistributing flushing water and flushing gas transmitted by the first water distribution gas pipe, and the redistributing flushing water and flushing gas of the second water distribution gas pipe are used for backwashing the filter tank.

Optionally, the filter tank further comprises:

the flushing water draining weir is arranged at the water draining outlet of the filter tank and is used for distributing and collecting waste water after flushing the filter tank;

a drain channel connected to the flushing weir, the drain channel for draining the flushed wastewater;

wherein the first water and gas distribution pipe vertically passes through the water and gas distribution channel; the junction of first water distribution gas pipe and second water distribution gas pipe is located in the drainage channel, the top of drainage channel is open structure, non-enclosure space.

Optionally, the second water distribution pipe is arranged on a bottom plate in the filter tank; the second water distribution pipe further comprises:

the water distribution holes and the air distribution holes are uniformly formed in the area, inside the filter tank, of the second water distribution pipe.

Optionally, a part of the pipeline of the second water distribution pipe is positioned in the drainage channel, no water distribution hole and no air distribution hole are arranged in the part of the pipeline, and the part of the pipeline is connected with the first water distribution pipe; wherein, partial pipeline of second water distribution gas pipe passes drainage channel lateral wall.

Optionally, the filter tank further comprises:

a filter material layer;

the supporting layer is arranged at the lower part of the filter material layer and is positioned at the upper part and the side part of the second water distribution pipe; the flushing water and the flushing air which are distributed again by the second water distribution and distribution pipe flow through the supporting layer and the filter material layer.

Optionally, the filter tank further comprises:

the V-shaped groove is arranged on the side wall of the filter tank and is positioned at the upper part of the filter tank;

and the edge groove plates are arranged along the edges of the two sides of the V-shaped groove.

Optionally, a plurality of water passing holes with the same size and uniform distribution are formed in the side groove plate.

In a second aspect, an embodiment of the present application provides a working method of a filter tank, which is applied to the filter tank described above, where the working method is used in a backwash stage of the filter tank, and the working method includes:

transmitting flushing water and flushing gas to the water and gas distribution channels;

distributing flushing water and flushing gas through the water and gas distribution channels, and transmitting the flushing water and the flushing gas distributed through the water and gas distribution channels to the first water and gas distribution pipe;

the flushing water and the flushing gas distributed by the water and gas distribution channels are transmitted to the second water and gas distribution pipe through the first water and gas distribution pipe;

the flushing water and the flushing gas transmitted by the first water distribution gas pipe are redistributed through the second water distribution gas pipe, and the flushing water and the flushing gas redistributed by the second water distribution gas pipe are used for backwashing the filter tank.

Optionally, the working method further includes:

raw water is introduced through the V-shaped grooves, enters the filter tank through water passing holes in the side groove plates and flows to the surface of the filter material layer so as to sweep the surface of the filter material layer.

Optionally, the working method is further used for a filtering stage of the filter tank, and the working method further includes:

introducing water to be filtered into the V-shaped groove, and allowing the water to be filtered to enter the filter tank through the edge groove plate;

filtering water to be filtered through a filter material layer, and transmitting clear water filtered by the filter material layer to a second water distribution pipe through a supporting layer;

introducing clear water conveyed by the second water distribution gas pipe through the first water distribution gas pipe;

the clean water transmitted by the first water and gas distribution pipe is introduced through the water and gas distribution channel, and the clean water transmitted by the water and gas distribution channel is discharged through a clean water valve connected with the water and gas distribution channel.

The filter tank comprises a water and gas distribution system; the water and gas distribution system comprises: the water and gas distribution system comprises a water and gas distribution channel, a first water and gas distribution pipe connected with the water and gas distribution channel, and a second water and gas distribution pipe connected with the first water and gas distribution pipe; when back flushing of the filter tank is carried out, the water and gas distribution channels are used for introducing flushing water and flushing gas and distributing the flushing water and the flushing gas, and the flushing water and the flushing gas distributed by the water and gas distribution channels are transmitted to the first water and gas distribution pipe; the first water and gas distribution pipe is used for transmitting flushing water and flushing gas distributed by the water and gas distribution channel to the second water and gas distribution pipe; the second water distribution gas pipe is used for redistributing flushing water and flushing gas transmitted by the first water distribution gas pipe, and the redistributing flushing water and flushing gas of the second water distribution gas pipe are used for backwashing the filter tank.

It can be seen that in this application embodiment, the water distribution and gas distribution system adopts water distribution and gas distribution channel to carry out once and distribute washing water and gas to adopt first water distribution gas distribution pipe to transmit the washing water and the gas of water distribution and gas distribution channel distribution to the second water distribution gas distribution pipe, carry out the redistribution to washing water and gas by the second water distribution gas distribution pipe. Therefore, the embodiment of the application can adopt a channel and pipeline mode to distribute flushing water and flushing gas twice, and a gas water chamber is not required to be arranged in a water and gas distribution system, so that the overall pond depth of the filter pond is reduced; meanwhile, the water and gas distribution channel, the first water and gas distribution pipe and the second water and gas distribution pipe are light in overall weight and small in size, can be installed conveniently, and can greatly reduce the civil engineering cost and the construction period of the filter tank. Therefore, the embodiment of the application can simplify the structure of the water and gas distribution system in the filter tank, thereby providing possibility for convenient installation of the filter tank.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.

FIG. 1 is a diagram showing an example of a structure of a V-type filter tank related to a water and gas distribution system.

FIG. 2 is a schematic view showing an example of the structure of a filter according to an embodiment of the present application.

FIG. 3 is a flow chart of the filtering stage of the filter according to the embodiment of the present application.

FIG. 4 is a workflow diagram of a backwash stage of an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The filter tank can isolate solid particles and impurities in water to be filtered through the filter layer so as to remove unwanted impurities in the water to be filtered, thereby improving the water quality; the filter tank can be suitable for filtration treatment in various fields such as drinking water, industrial process water, wastewater treatment and the like.

The working phases of the filter tank can comprise a filtering phase and a back flushing phase. Taking filtering wastewater as an example, in the filtering stage, the working process of the filter can be as follows:

the wastewater enters a filtering pond and flows through a filtering material of the filtering pond, so that fine suspended matters and colloid substances in the wastewater are trapped on the surface of the filtering material and in gaps of an inner layer of the filtering material, and the wastewater is purified to obtain clear water after filtering treatment; the clean water after the filtering treatment can be discharged after being collected and can also be recycled.

In the back flushing stage, the filter can be flushed by a gas-water combination mode, for example, the filter is flushed by a combination mode of flushing water and flushing gas phase. The flushing water can be clear water for flushing the filter tank and is used for flushing the granular impurities in the filter tank out of the filter tank; the flushing gas can be gas for flushing the filter tank, and can be in the form of bubbles and the like and is used for separating solid particles and colloid in impurities in the filter tank.

During the backwash stage, the filter may be operated, for example:

flushing water and flushing gas enter the tank of the filter tank, and after being distributed, the flushing water and the flushing gas flush the filter material of the filter tank, so that the particulate impurities trapped in the filter material are flushed out, and the impurities are carried in and discharged out of the tank of the filter tank.

It can be seen that in back flushing the filter, a structure for distributing flushing water and flushing gas, called a water and gas distribution system, is required; the water and gas distribution system is used as a related structure for backwashing in the filter tank, and can distribute flushing water and flushing gas.

In order to facilitate understanding, the water and gas distribution system is described below from the angle of the V-shaped filter tank. The V-shaped filter tank is a device for water treatment and wastewater treatment, and is characterized by having a special V-shaped groove design and being used for removing suspended matters, solid particles and other pollutants in water so as to improve the water quality and purify the engineering structure of the water quality.

The V-shaped filter tank can be used as a filter tank and can comprise a tank body, a water inlet system, a surface cleaning device, a filtering system, a water and gas distribution system, a drainage system and the like. The water inlet system comprises a water inlet main pipe, a water inlet valve (or a water inlet gate) and V-shaped grooves positioned at two sides of the tank body; the surface cleaning device comprises a water inlet regulating valve and a plurality of small water distribution holes, the water inlet regulating valve is arranged at a main water inlet communicated with the V-shaped groove, and the small water distribution holes are arranged in the V-shaped groove; the water and gas distribution system comprises a gas water chamber for distributing flushing water and flushing gas; the filtering system comprises a filtering material layer, a filtering plate and a long handle filtering head arranged on the filtering plate; the back flushing system comprises a back flushing air pipe and a back flushing water inlet pipe which are arranged at the bottom of the tank; the drainage system includes a drain valve (or drain gate) and a drain channel.

For further understanding of the water and gas distribution system of the V-bank filter, fig. 1 schematically illustrates an exemplary view of the structure of the V-bank filter associated with the water and gas distribution system, and referring to fig. 1, a tank 110 is a key component of the filter for receiving and supporting a filter bed.

The water and gas distribution system of the V-shaped filter tank is disposed in the tank body 110, and the water and gas distribution system may include: water distribution chamber 120, air distribution hole 130, air water chamber 140, and water distribution hole 141.

Further, a filter plate 150 is disposed in the tank 110, and a plurality of filter heads 151 are disposed on the filter plate 150, and the filter heads 151 are used for passing filtered water in a filtering stage of the filtering tank.

As shown in connection with fig. 1, the water distribution chamber 120 is disposed below the filter plate 150; the bottom end of the water distribution chamber 120 is provided with a gas water chamber 140, and the gas water chamber 140 is used for managing the distribution and flow of flushing water and flushing gas in the filter tank; the top end of the air water chamber 140 is provided with air distribution holes 130 (the number of the air distribution holes can be a plurality of), one end of each air distribution hole 130 is communicated to the inside of the air water chamber 140, the other end of each air distribution hole 130 extends into the inner top end of the air distribution chamber 120 and is positioned below the filter plate 150, and the air distribution holes 130 are used for transmitting air distributed by the air water chamber 140 in the filter; in addition, the sidewall of the air water chamber 140 is provided with water distribution holes 141 (the number may be plural), and the water distribution holes 141 are used to distribute the water distributed from the air water chamber 140 to the water distribution chamber 120.

On the basis of the above structure, when the filter is filtering, water to be filtered enters the tank 110 and is filtered through the filter material in the tank 110 and the plurality of filter heads 151 on the filter plate 150. When the back flushing filter tank is in back flushing, the back flushing can be divided into air flushing and water flushing; during the air washing in the back washing stage, the external air supply device introduces the washing air into the air water chamber 140, and the washing air is uniformly introduced below the filter plate 150 through the plurality of air distribution holes 130, so that impurities in the filter materials on the plurality of filter heads 151 are washed out; during the water washing in the back washing stage, the air water chamber 140 is introduced with washing water, the washing water is introduced into the water distribution chamber 120 through the water distribution holes 141 on both sides of the air water chamber 140, and impurities in the filter materials on the plurality of filter heads 151 are washed out.

In the V-shaped filter tank, the water and gas distribution system consists of a water distribution and gas distribution chamber, a gas water chamber and the like, and more parts are involved in the water and gas distribution system, so that more installation steps are involved in the water and gas distribution system when the V-shaped filter tank is installed, and the installation of the V-shaped filter tank is complicated; meanwhile, because the space occupied by the air water chamber in the water and gas distribution system is larger, the filter tank needs to be provided with a deeper tank body with the adaptation, and the installation of the V-shaped filter tank is more complicated. Therefore, improvement on the V-shaped filter tank is needed to simplify the structure of the water and gas distribution system, thereby providing possibility for convenient installation of the filter tank.

As an alternative implementation, fig. 2 is an exemplary diagram illustrating a structure of a filter tank provided in an embodiment of the present application, and referring to fig. 2, a water distribution system of the filter tank may include: water and gas distribution channel 211, first water and gas distribution pipe 212, second water and gas distribution pipe 213.

The first water and gas distribution pipe 212 is connected with the water and gas distribution channel 211 and the second water and gas distribution pipe 213, the bottom end of the first water and gas distribution pipe 212 is communicated into the water and gas distribution channel 211, and the top end of the first water and gas distribution pipe 212 extends into the second water and gas distribution pipe 213.

In an alternative implementation, the water and gas distribution channel 211 is used to drain the clean water obtained after filtration during the filtration phase and to distribute the flushing water and flushing gas entering the filter during the backwash phase.

In an alternative implementation, the rinse water may be provided by a rinse water basin or tank and delivered to the water and gas distribution channels 211 through the rinse water lines of the filter. In one example, as shown in connection with FIG. 2, the flush water delivery system may include a backwash pump 221, and a flush water valve 222 on the flush water pipe; during the back flushing stage of the filter tank, when the flushing water needs to be transmitted to the water and gas distribution channel 211, the back flushing pump 221 and the flushing water valve 222 can be opened, so that the flushing water provided by the flushing water tank or water tank can be transmitted to the water and gas distribution channel 211 through the back flushing pump 221 and the flushing water valve 222.

In an alternative implementation, the rinse gas may be provided by a blower and delivered to the water and gas distribution channels 211 via a rinse gas delivery system of the filter tank. In one example, as shown in connection with FIG. 2, the rinse gas delivery system may include a backwash blower 231 and a rinse gas valve 232 on the rinse gas line; in the back flushing stage of the filter tank, when the flushing gas needs to be transmitted to the water and gas distribution channel 211, the back flushing fan 231 and the flushing gas valve 232 can be opened, and the flushing gas can be transmitted to the water and gas distribution channel 211 through the back flushing fan 231 and the flushing gas valve 232.

The first water distribution pipe 212 is used for transmitting clear water obtained after filtration in the filtration stage; and the flushing water and the flushing gas distributed by the water and gas distribution channel 211 are transmitted to the second water and gas distribution pipe 213 in the back flushing stage. The second water distribution pipe 213 is used for transmitting clear water in the filtering stage; and during the backwash stage, the rinse water and rinse gas delivered by the first water distribution pipe 212 are redistributed. The washing water and the washing gas redistributed by the second water distribution pipe 213 can be used to backwash the filter.

In an alternative implementation, the second water distribution pipe 213 may be a horizontal water distribution pipe and the first water distribution pipe 212 may be a vertical water distribution pipe. For example, the horizontal water distribution gas pipe is a water distribution gas pipe transversely arranged relative to the horizontal plane of the filter tank, and the vertical water distribution gas pipe is a water distribution gas pipe vertically arranged relative to the horizontal plane of the filter tank.

That is, in an alternative implementation, during the backwash stage of the filter, the water and gas distribution channels 211 distribute the rinse water and rinse gas entering the filter; a first water and gas distribution pipe 212 connected with the water and gas distribution channel 211 is used for introducing flushing water and flushing gas distributed by the water and gas distribution channel 211 and transmitting the flushing water and the flushing gas to a second water and gas distribution pipe 213; the second water distribution pipe 213 redistributes the flushing water and the flushing gas transferred by the first water distribution pipe, and the flushing water and the flushing gas redistributed by the second water distribution pipe 213 can back flush the filter tank.

The embodiment of the application distributes flushing water and flushing gas once through the water and gas distribution channel 211 and redistributes the flushing water and the flushing gas through the second water and gas distribution pipe 213, so that the flushing water and the flushing gas can act on the backwash filter after being distributed twice, and dirt, particles, impurities and the like in the filter are removed when the backwash filter is facilitated, and normal operation of the filter is maintained.

In a further alternative implementation, within the water and gas distribution channel, gas enters the first water and gas distribution pipe 212 at the upper part of the water and gas distribution channel 211. Water enters the lower part of the water and gas distribution channel 211 through the lower end opening of the first water and gas distribution pipe 212, and the water and gas distribution process is completed.

In a further alternative implementation, as shown in connection with fig. 2, the second water distribution pipe 213 may be provided on the floor in the filter tank. Alternatively, the second water distribution pipe 213 may be provided with a plurality of water distribution holes and a plurality of air distribution holes. The water distribution holes and the air distribution holes are used for redistributing flushing water and flushing air transmitted by the first water distribution pipe. For example, the water distribution holes may be used to evenly distribute water to the filter material layer to flush and clean the filter material to remove attached suspended matter and impurities; the air distribution holes can be used for introducing air bubbles, and dirt and impurities attached to the filter material are effectively cleaned and separated by stirring and impacting the filter material layer so as to help restore the performance of the filter material. In an alternative implementation, the water distribution holes and the air distribution holes may be uniformly arranged in the area of the second water distribution pipe 213 located inside the filter tank.

In a further alternative implementation, as shown in connection with fig. 2, the filter further comprises: the filter material layer 241, the support layer 242 and the clean water valve 251, and the water and air distributed by the second water distribution pipe 213 flow through the support layer 242 and the filter material layer 241, and the clean water valve 251 is connected with the water and air distribution channel for discharging the clean water after filtering.

In an alternative implementation, the support layer 242 is disposed at a lower portion of the filter layer 241 and is located at an upper portion and a side portion of the second water distribution pipe 213. The filter layer 241 is a porous layer for separating impurities and particles in water, and allows water to freely flow and entraps the impurities through pores thereof, thereby purifying sewage; the support layer 242 serves to support and stabilize the filter layer from scouring or shifting while providing a strong bottom support. In one example, the filter material layer 241 may be a quartz sand filter material, a ceramic filter material, or a multi-layer filter material; the support layer 242 may be comprised of a plurality of finely divided gravel.

In the filtering stage of the filter tank, when water to be filtered enters the filter tank, the water is filtered through the filter material layer 241 to become clean water, the clean water flows into the second water distribution pipe 213 through the supporting layer 242 through the plurality of water distribution holes and the plurality of air distribution holes, flows into the water distribution channel 211 through the first water distribution pipe 212, and the clean water in the water distribution channel 211 flows out through the clean water valve 251.

In a further alternative implementation, as shown in connection with FIG. 2, the filter may further comprise: inlet valve 261, V-groove 262, V-hole 263 and side channel plate 264.

The V-shaped groove 262 is arranged on the side wall of the filter tank and is positioned on the upper part of the filter tank; the edge groove plates are arranged along the edges of the two sides of the V-shaped groove. In an alternative implementation, the inlet valve 261 is used to control the inlet water flow and maintain a proper water level to ensure that the filter operates efficiently and adapts to different flows; v-grooves 262 are used to introduce water uniformly into the filter media layer; the V-shaped holes 263 are used to introduce water into the V-shaped grooves; side channel plate 264 for defining and directing the flow of water.

In a further alternative implementation, as shown in connection with FIG. 2, the side channel plate 264 may include: a plurality of water passing holes 2641 which are the same in size and are uniformly distributed. In an alternative implementation, the water holes 2641 are used to distribute the incoming water flow to allow it to enter the filter chamber evenly.

In a further alternative implementation, a water distribution chamber may be provided after the water inlet valve 261, with an inlet weir provided therein, and a V-shaped hole 263 provided in the lower portion of the water distribution chamber after the inlet weir. When the water inlet valve 261 is opened, the water level in the water distribution chamber rises; when the water level is higher than the water inlet weir, the water enters the V-shaped groove 262 through the V-shaped holes 263 and flows into the filter tank through the water passing holes 2641 of the side groove plate 264. Wherein the V-shaped groove 262 can be a concrete V-shaped groove, and the side groove plate can be a concrete side groove plate; v-grooves and edge groove plates made of steel or stainless steel or other materials can also be adopted; the plurality of water passing holes may be circular holes having the same diameter.

In a further alternative implementation, as shown in connection with FIG. 2, the filter may further comprise: a flushing drain weir 271 for distributing and collecting the wastewater after the filter tank flushing, a drain channel 272, and a drain valve 281; the drainage channel is used for discharging the washed wastewater; the first water and gas distribution pipe vertically penetrates through the water and gas distribution channel; the joint of the first water distribution pipe and the second water distribution pipe is positioned in the drainage channel, and an open structure and a non-closed space are arranged above the joint.

In an alternative implementation, a drain valve 281 is located on the drain channel for draining waste water and impurities from the filter; the drain channel 272 serves to collect and direct the filtered wastewater out of the filter, and the drain weir 271 helps maintain the filter at a proper water level and water flow rate, preventing the filter from becoming too low or uneven in local water flow.

The drain channel 272 is disposed intermediate the opposing V-grooves 262, and the two flushing drains 271 form the side walls of the drain channel 272. A drain valve 281 is provided at one end of the drain channel 272; in the lower portion of the drain channel 272, a plurality of preformed holes 282 are provided in the flushing drain weir 271, the preformed holes 282 in the flushing drain weir being adapted for: a portion of the tubing of the second water distribution tube 213 passes through the preformed hole 282 into the drain channel 272. In the drainage channel 272, the second water distribution pipe 213 is fixedly connected with the first water distribution pipe 212. The drain channel 272 and the water and gas distribution channel 211 are vertically separated by a fixing plate 291, and a plurality of preformed holes are also arranged on the fixing plate 291, and the preformed holes on the fixing plate are used for: the first water distribution pipe 212 passes down through the fixing plate 291 and into the water and gas distribution channel 211. Further, concrete may be secondarily poured at the edges and upper portions of the fixing plate 291 so as to maintain the sealing and fixing of the fixing plate to the tank body.

In the back flushing stage, the drain valve 281 is opened, and the wastewater washed in the filter tank is discharged through the washing drain weir 271 and the drain channel 272. Further, in the case that the second water distribution pipe 213 is installed and fixed to the reserved hole 282 of the flushing weir, the reserved hole 282 may be blocked by water.

In a further alternative implementation, as shown in connection with fig. 2, a part of the pipes of the second water distribution pipe 213 is located in the water discharge channel, the part of the pipes is not provided with water distribution holes and air distribution holes, and the part of the pipes is connected with the first water distribution pipe; wherein, partial pipeline of second water distribution gas pipe passes drainage channel lateral wall.

Based on the filter provided in the embodiments of the present application, in a further optional implementation, the embodiments of the present application further provide a working method of the filter, so as to introduce a working process of the filter. The working process of the filter tank can be divided into the working process of the filtering stage and the working process of the back flushing stage. Fig. 3 shows a flow chart of the filtering phase of the method of operation of the filter, which method flow may comprise the following steps, with reference to fig. 3.

And step S310, introducing water to be filtered into the V-shaped groove, and entering the filter tank through the side groove plate.

When the filter tank starts to filter, the flushing water valve, the flushing air valve and the drain valve are closed; then, opening a water inlet valve and a clear water valve, and enabling water to be filtered to enter the water distribution chamber from the water inlet valve so as to enable the water level in the water distribution chamber to rise; when the water level is higher than the water inlet weir, water enters the V-shaped groove through the V-shaped hole, so that water to be filtered enters the V-shaped groove through the V-shaped hole, and then enters the filter tank through the water passing hole and/or the upper part of the side groove plate.

In an alternative implementation, when the amount of water entering the V-shaped groove is small, water to be filtered flows into the filter tank through the water holes; when the water quantity entering the V-shaped groove reaches a certain standard, the water to be filtered flows into the filter tank through the water holes and the upper parts of the side groove plates.

In one implementation example, the V-shaped groove may be a concrete V-shaped groove, and the edge groove plate may be a concrete edge groove plate or a metal edge groove plate; v-grooves made of steel or stainless steel or other materials may also be used.

Step S320, filtering the water to be filtered through the filter material layer.

After the filtered water flows into the filter tank, the filtered water passes through the filter material layer, larger particles are intercepted by pores or gaps of the filter material layer, and some impurities in the water can generate adsorption action with the surface of the filter material, so that the impurities are removed from the water, and small particles and suspended matters can be deposited in the filter material layer and filtered. The clear water filtered by the filter material layer flows to the supporting layer.

In alternative implementations, the filter material layer may be a quartz sand filter material, a ceramic particle filter material, or a multi-layer filter material; the support layer may consist of a number of finely divided gravel.

Step S330, introducing the filtered clean water through the supporting layer through a second water distribution pipe.

In an alternative implementation, clean water obtained after filtering by the filter material layer passes through the supporting layer and flows into the second water distribution pipe through the water distribution holes and the air distribution holes of the second water distribution pipe.

In an alternative implementation, the second water distribution pipe is a transverse water distribution pipe, and a plurality of water distribution holes and a plurality of air distribution holes are arranged on a pipeline positioned in the filter tank.

Step S340, introducing the filtered clean water of the second water distribution gas pipe through the first water distribution gas pipe.

In an alternative implementation, the second water distribution pipe section located within the drainage channel is piped to the first water distribution pipe. The first water distribution gas pipe is led into the filtered clean water of the second water distribution gas pipe through the joint of the two pipelines.

Step S350, introducing filtered clear water of the first water and gas distribution pipe through a water and gas distribution channel, and enabling a clear water valve connected with the water and gas distribution channel to flow out of the filtered clear water of the water and gas distribution channel.

The first water and gas distribution pipe transmits the filtered clean water to the water and gas distribution channel, and the clean water valve is in an open state at the moment, so that the filtered clean water flows out through the clean water valve connected with the water and gas distribution channel. And when the filtering is finished, the water inlet valve is closed, the filtering tank continues to filter, and when the water level is reduced to a certain standard height from the surface of the filter material layer, the water cleaning valve is closed.

In an alternative implementation, the height of a certain standard is set to: when the water surface of the filter tank is lowered, a margin for responding to the control water level needs to be reserved for the instrument and the controller of the filter tank in order to avoid the water surface from being too low. The height of a certain standard may be, for example, 100mm (millimeters) to 200mm. Still further, the controller of the filter is typically a PLC (programmable logic controller) mounted at the upper portion between the filter tube lanes. The controller of the filter tank controls the start and stop of the automatic valve, the flushing pump and the fan of the filter tank through signals of various instruments.

The working method of the filter tank provided in the embodiment of the present application will be described from the viewpoint of the back flushing stage of the filter tank, and fig. 4 shows a working flow chart of the back flushing stage in the working method of the filter tank, and referring to fig. 4, the flow of the method may include the following steps.

Step S410, the flushing water and the flushing gas are transmitted to the water and gas distribution channels.

The back flushing stage can adopt a gas-water combined mode for flushing. When flushing is started, the water cleaning valve and the water inlet valve are closed; then, opening a backwashing pump, a backwashing fan, a flushing water valve, a flushing air valve and a drainage valve; so that the flushing water and the flushing gas are transmitted to the water and gas distribution channels through the flushing water valve and the flushing gas valve.

In an alternative implementation, the flushing water and the flushing gas in the air-water combination can respectively act on the filter tank, and the consumption of the flushing water and the consumption of the flushing gas can also be respectively set, for example, the flushing can be performed by adopting an air flushing mode firstly, then the flushing is performed by adopting an air flushing mode and a water flushing mode with small water quantity simultaneously, and then the flushing is performed by adopting a water flushing mode with large water quantity. Where the small and large volumes of water can be calibrated by the number of pumps activated (e.g., 1 pump activated for small volumes and 2 pumps activated for large volumes).

Step S420, flushing water and flushing gas are distributed through the water and gas distribution channels.

Wherein in the water and gas distribution channel, gas enters the first water and gas distribution pipe 212 at the upper part of the water and gas distribution channel 211. Water enters the lower part of the water and gas distribution channel 211 through the lower end opening of the first water and gas distribution pipe 212, and the water and gas distribution process is completed.

And S430, introducing flushing water and flushing gas distributed by the water and gas distribution channels through a first water and gas distribution pipe.

The first water and gas distribution pipe connected with the water and gas distribution channel introduces the flushing water and the flushing gas distributed by the water and gas distribution channel, and transmits the distributed flushing water and flushing gas into the second water and gas distribution channel.

In an alternative implementation, the first water distribution pipe may be a vertical water distribution pipe.

And step S440, redistributing flushing water and flushing gas transmitted by the first water distribution gas pipe through the second water distribution gas pipe, wherein the flushing water and the flushing gas redistributed by the second water distribution gas pipe are used for backwashing the filter tank.

The first water and gas distribution pipe transmits flushing water and flushing gas distributed by the water and gas distribution channel to the second water and gas distribution pipe, and then the flushing water and the flushing gas are distributed again by the second water and gas distribution pipe; the second water distribution and gas distribution pipe distributes flushing water and flushing gas, and the water distribution holes and the gas distribution holes flush the filter material layer of the filter tank, so that the particle impurities remained when the filter material layer filters sewage are flushed out.

In an alternative implementation, after the gas-water combined flushing, stopping the gas flushing, and closing the flushing gas valve; then, adopting a water flushing mode with large water quantity to flush impurities out of the filter material layer; the washed waste water carries suspended impurity particles and is discharged through a washing water discharge weir and a drainage canal.

In a further alternative implementation, as shown in connection with fig. 4, in step S450, raw water is introduced through the V-grooves, and the raw water enters the filter tank through the water passing holes in the side groove plates and flows to the filter material layer, so as to sweep the filter material layer.

When the large water quantity is washed, the water inlet valve is opened, raw water flows into the filter tank through the water passing holes of the V-shaped grooves, and the surface of the filter material layer is cleaned. After the filter material layer is washed cleanly, the washing water valve and the water inlet valve are closed, and the washing process is stopped.

In the alternative implementation, a primary water filtering valve can be added in the filter tank, and after flushing is finished, the water inlet valve and the primary water filtering valve are opened to discharge suspended particle impurities in the filter layer, so that the quality of clear water is ensured.

The filter that this application embodiment provided has filtering capability and back flush function, just the filter mainly comprises V-arrangement groove, V-arrangement hole, limit frid, filter material layer, supporting layer, drainage channel, washing drainage weir, water distribution gas distribution channel, first water distribution gas distribution pipe, second water distribution gas distribution pipe. And in the back flushing stage, the flushing water and the flushing gas are distributed once by adopting the water and gas distribution channels, the flushing water and the flushing gas distributed by the water and gas distribution channels are transmitted to the second water and gas distribution pipe by adopting the first water and gas distribution pipe, and the flushing water and the flushing gas are distributed again by the second water and gas distribution pipe. Therefore, the embodiment of the application can adopt a channel and pipeline mode to distribute flushing water and flushing gas twice, and an air water chamber is not required to be arranged in a water and gas distribution system, so that the overall pond depth of the filter pond is reduced; meanwhile, the water and gas distribution channel, the first water and gas distribution pipe and the second water and gas distribution pipe are light in overall weight and small in size, can be installed conveniently, and can greatly reduce the civil engineering cost and the construction period of the filter tank. Therefore, the embodiment of the application can simplify the structure of the water and gas distribution system in the filter tank, thereby providing possibility for convenient installation of the filter tank.

The foregoing describes a number of embodiments provided by embodiments of the present application, and the various alternatives presented by the various embodiments may be combined, cross-referenced, with each other without conflict, extending beyond what is possible, all of which may be considered embodiments disclosed and disclosed by embodiments of the present application.

Although the embodiments of the present application are disclosed above, the present application is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention shall be defined by the appended claims.

Claims (10)

1. The filter tank is characterized by comprising a water and gas distribution system; the water and gas distribution system comprises: the water and gas distribution system comprises a water and gas distribution channel, a first water and gas distribution pipe connected with the water and gas distribution channel, and a second water and gas distribution pipe connected with the first water and gas distribution pipe;

the water and gas distribution channels are used for introducing flushing water and flushing gas and distributing the flushing water and the flushing gas, and the flushing water and the flushing gas distributed by the water and gas distribution channels are transmitted to the first water and gas distribution pipe;

the first water and gas distribution pipe is used for transmitting flushing water and flushing gas distributed by the water and gas distribution channel to the second water and gas distribution pipe;

the second water distribution gas pipe is used for redistributing flushing water and flushing gas transmitted by the first water distribution gas pipe, and the redistributing flushing water and flushing gas of the second water distribution gas pipe are used for backwashing the filter tank.

2. The filter of claim 1, further comprising:

the flushing water draining weir is arranged at the water draining outlet of the filter tank and is used for distributing and collecting waste water after flushing the filter tank;

a drain channel connected to the flushing weir, the drain channel for draining the flushed wastewater;

wherein the first water and gas distribution pipe vertically passes through the water and gas distribution channel; the junction of first water distribution gas pipe and second water distribution gas pipe is located in the drainage channel, the top of drainage channel is open structure, non-enclosure space.

3. A filter according to claim 1, wherein the second water distribution pipe passes through the side wall of the drainage canal and is further arranged on a bottom plate in the filter; the second water distribution pipe comprises:

the water distribution holes and the air distribution holes are uniformly formed in the area, inside the filter tank, of the second water distribution pipe.

4. A filter according to any one of claims 2 to 3, wherein a portion of the tubing of the second water distribution pipe is located within the drainage channel, the portion of the tubing is not provided with water distribution holes and air distribution holes, and the portion of the tubing is connected to the first water distribution pipe; wherein, partial pipeline of second water distribution gas pipe passes drainage channel lateral wall.

5. The filter of claim 1, further comprising:

a filter material layer;

the supporting layer is arranged at the lower part of the filter material layer and is positioned at the upper part and the side part of the second water distribution pipe; the flushing water and the flushing air which are distributed again by the second water distribution and distribution pipe flow through the supporting layer and the filter material layer.

6. The filter of claim 1, further comprising:

the V-shaped groove is arranged on the side wall of the filter tank and is positioned at the upper part of the filter tank;

and the edge groove plates are arranged along the edges of the two sides of the V-shaped groove.

7. The filter according to claim 6, wherein a plurality of water passing holes which are identical in size and uniform in distribution are formed in the side groove plate.

8. A method of operation of a filter tank as claimed in any one of claims 1 to 7, applied to a backwash stage of a filter tank, the method comprising:

transmitting flushing water and flushing gas to the water and gas distribution channels;

distributing flushing water and flushing gas through the water and gas distribution channels, and transmitting the flushing water and the flushing gas distributed through the water and gas distribution channels to the first water and gas distribution pipe;

the flushing water and the flushing gas distributed by the water and gas distribution channels are transmitted to the second water and gas distribution pipe through the first water and gas distribution pipe;

the flushing water and the flushing gas transmitted by the first water distribution gas pipe are redistributed through the second water distribution gas pipe, and the flushing water and the flushing gas redistributed by the second water distribution gas pipe are used for backwashing the filter tank.

9. The method of operating a filter of claim 8, further comprising:

raw water is introduced through the V-shaped grooves, enters the filter tank through water passing holes in the side groove plates and flows to the surface of the filter material layer so as to sweep the surface of the filter material layer.

10. A method of operating a filter according to claim 8, wherein the method is further used in a filtration stage of the filter, the method further comprising:

introducing water to be filtered into the V-shaped groove, and allowing the water to be filtered to enter the filter tank through the edge groove plate;

filtering water to be filtered through a filter material layer, and transmitting clear water filtered by the filter material layer to a second water distribution pipe through a supporting layer;

introducing clear water conveyed by the second water distribution gas pipe through the first water distribution gas pipe;

the clean water transmitted by the first water and gas distribution pipe is introduced through the water and gas distribution channel, and the clean water transmitted by the water and gas distribution channel is discharged through a clean water valve connected with the water and gas distribution channel.