CN114890571B - Reverse series connection carbon sand filter tank and water filtering method - Google Patents

Abstract

The invention provides a reverse series connection carbon sand filter and a water filtering method, wherein the reverse series connection carbon sand filter comprises a carbon pool unit, a sand pool unit and a water outlet unit, the reverse series connection carbon sand filter further comprises a multifunctional water inlet and water outlet channel unit, the multifunctional water inlet and water outlet channel unit is arranged between the carbon pool unit and the sand pool unit, the reverse series connection carbon sand filter is configured such that water to be filtered flows out from the multifunctional water inlet and water outlet channel unit, flows through the carbon pool unit from bottom to top, flows back to the multifunctional water inlet and water outlet channel unit, flows through the sand pool unit from top to bottom, and is finally discharged out of the reverse series connection carbon sand filter through the water outlet unit. The multifunctional water inlet and drainage canal unit is arranged in the middle and the carbon pool unit is arranged in the left and the right of the sand pool unit in a split way, so that the space of the multifunctional water inlet and drainage canal unit can be fully utilized, and various necessary facilities can be built in the space, so that the arrangement is more reasonable and compact, and the occupied area is smaller.

Description

Reverse series connection carbon sand filter tank and water filtering method

Technical Field

The invention relates to the technical field of water supply treatment, in particular to a reverse series connection carbon sand filter tank and a water filtering method.

Background

At present, the advanced treatment of a tap water plant, the treatment of a sewage plant and the treatment of special water are mainly carried out by adopting an ozone biological activated carbon process and a sand filter process, wherein the ozone biological activated carbon process has better removal rate for natural organic matters and ammonia nitrogen in raw water, and the sand filter process has better removal rate for granular matters in water. The form of the biological activated carbon adsorption tank in the ozone biological activated carbon process comprises a downward flow fixed bed and an upward flow fluidized bed. The biological activated carbon adsorption tanks adopting the downward flow fixed bed are more common, but in recent years, the biological activated carbon adsorption tanks of the upward flow fluidized bed are gradually popularized and used. Compared with the traditional biological activated carbon adsorption tank of a downward flow fixed bed, the biological activated carbon adsorption tank of the upward flow fluidized bed has more advantages: the expansion rate of the upward flow activated carbon adsorption tank is good, the expansion rate of the upward flow activated carbon adsorption tank can reach 30% -50%, the higher expansion rate can ensure that the activated carbon fully plays a role, and the removal rate of organic matters is improved; secondly, the use efficiency of the upward flow activated carbon adsorption tank is high, the flow speed is high, and the occupied area is small; thirdly, the head loss of the upward flow activated carbon adsorption tank is relatively small, which is about 1.0 m-1.2 m.

The patent number CN202022468558.6 discloses a carbon sand double-spliced filter with a central canal, which adopts the scheme that a carbon pond is communicated with a sand pond through an opening of a partition wall, water to be treated firstly enters the carbon pond from a water inlet canal and then enters the sand pond, a water inlet main canal is arranged at the leftmost side, the carbon pond is arranged in the middle, and the sand pond is arranged at the rightmost side in a forward series arrangement mode. However, the arrangement mode of the forward series-connection carbon sand filter is not compact enough, the sand tank overrun channel is convenient to set when the sand tank overrun channel is required to overrun the carbon tank, the occupied area is large, and the limitation is more when the water plant is actually arranged.

Disclosure of Invention

The invention aims to overcome the defects that when a carbon sand filter adopts a forward series layout mode, the structure is not compact enough, the occupied area is large, and an overrunning channel is inconvenient to set, and provides a reverse series carbon sand filter and a water filtering method.

The invention solves the technical problems by the following technical scheme:

the utility model provides a reverse series connection charcoal sand filtering pond, includes charcoal pond unit, sand pond unit and play water unit, reverse series connection charcoal sand filtering pond still includes multi-functional water drainage canal unit that intakes, multi-functional water drainage canal unit sets up charcoal pond unit with between the sand pond unit, multi-functional water drainage canal unit intercommunication charcoal pond unit with the sand pond unit, reverse series connection charcoal sand filtering pond is configured to wait to filter water and follow multi-functional water drainage canal unit outflow, from bottom to top flow through charcoal pond unit, and flow back multi-functional water drainage canal unit, then from top to bottom flows through the sand pond unit, finally through play water unit discharge to outside the reverse series connection charcoal sand filtering pond.

In the scheme, the multifunctional water inlet and drainage canal unit is arranged in the middle and the carbon tank unit is arranged in the left and right directions of the sand tank unit, so that the space of the multifunctional water inlet and drainage canal unit can be fully utilized, and various necessary facilities can be built in the space, so that the arrangement is more reasonable and compact, and the occupied area is smaller. The water outlet pipe of the carbon pond unit water outlet drainage canal is connected to the sand pond unit from the upper part, and the water outlet pipe is connected to the carbon drainage main canal from the bottom of the water outlet drainage canal, so that the carbon pond is settled to the canal bottom for discharging, and the entering of the sand pond can be avoided.

Preferably, the multifunctional water inlet and drainage canal unit includes:

the water inlet main channel is communicated with the bottom of the carbon pool unit and is used for supplying water to the bottom of the carbon pool unit.

The sand pool water inlet and drainage collecting channel is arranged at the lower end of the water inlet main channel, and the sand pool water inlet and drainage collecting channel is communicated with the carbon pool unit and the sand pool unit.

In this scheme, the multi-functional water inlet and drainage canal unit includes the water inlet main canal, the water inlet main canal with the bottom intercommunication setting of charcoal pond unit, the water inlet main canal is used for to the bottom water supply of charcoal pond unit, is equipped with the sand basin water inlet drainage and gathers the canal in the lower extreme of water inlet main canal, reverse series connection charcoal sand filter is configured to wait to filter water from the outflow of water inlet main canal in the multi-functional water inlet and drainage canal unit flows through from bottom to top the charcoal pond unit, and flows back the sand basin water inlet drainage in the multi-functional water inlet and drainage canal unit gathers the canal.

The multifunctional water inlet and drainage canal unit further comprises:

the sand pool drainage main channel is arranged at the lower end of the sand pool water inlet drainage collecting channel and can be communicated with the sand pool water inlet drainage collecting channel to form a backwash flow path of the sand pool unit.

The carbon pond drainage main canal is arranged at the lower end of the sand pond drainage main canal, and the carbon pond drainage main canal and the carbon pond unit can be communicated and arranged to form a carbon pond unit flushing flow path.

In the scheme, a backwash flow path of the sand pool unit, which is formed by the sand pool water inlet and drainage collecting channel and a sand pool drainage main channel which can be communicated with the sand pool water inlet and drainage collecting channel and is arranged at the lower end of the sand pool water inlet and drainage collecting channel, is arranged in the multifunctional water inlet and drainage channel unit; and the carbon pool unit flushing flow path comprises the carbon pool water outlet drainage canal and the carbon pool water drainage canal which can be communicated with the lower end of the sand pool water drainage canal, so that the functions of the multifunctional water inlet drainage canal unit can be perfected.

Preferably, the multifunctional water inlet and drainage canal unit further comprises:

the vertical water inlet channel is communicated with the water inlet main channel, and the vertical water inlet channel is arranged between the water inlet main channel and the carbon pool unit.

The water inlet valve is arranged on one side wall of the water inlet main channel, which is close to the carbon pool unit.

And the water inlet weir is positioned in the vertical water inlet channel, is arranged on one side of the water inlet valve close to the direction of the carbon pond unit, and is spaced from the water inlet valve.

The vertical water inlet channel is sequentially arranged to form a water inlet channel of the carbon pond.

The sand pool drain pipe is communicated with the water inlet and drainage collecting channel and the sand pool drainage main channel.

The sand pool drain valve is arranged on the sand pool drain pipe.

Wherein the sand pool drain pipe and the sand pool drain valve form a sand pool drain passage.

And the carbon pond drain pipe is communicated with the carbon pond drain main channel and the bottom of the carbon pond unit carbon pond water outlet drain channel.

And the carbon pond drain valve is arranged on the carbon pond drain pipe.

Wherein the carbon pool drain valve and the carbon pool drain pipe form a carbon pool drain passage.

In the scheme, the carbon tank unit drainage or the carbon tank unit water outlet entering into the sand tank unit can be controlled by opening or closing the carbon tank drain valve, so that the flexible control of the working mode of the carbon tank unit can be realized. The water inlet and drainage collecting channels of the sand pool are respectively communicated with the water outlet pipe of the carbon pool, the water outlet pipe of the sand pool and the water outlet groove of the sand pool, and are communicated with the water outlet main channel of the sand pool, so that the functions of communication, switching and water outlet main channel are achieved, the water can not fall back to the carbon pool, the water outlet valve of the sand pool also serves as a valve, and the water inlet or water outlet of the sand pool can be controlled by opening or closing the water outlet valve of the sand pool.

Preferably, the multifunctional water inlet and drainage canal unit further comprises:

the carbon pond water outlet drainage canal, the carbon pond water outlet drainage canal is located the carbon pond unit is close to the lateral wall of multi-functional water inlet drainage canal unit, lateral wall upper half is equipped with the carbon pond water hole, carbon pond water hole intercommunication the carbon pond water outlet drainage canal with carbon pond unit upper portion water catch bowl one-to-one, carbon pond water outlet drainage canal with the carbon pond drain pipe is linked together.

The carbon pool water outlet pipe is communicated with the carbon pool water outlet and drainage channel and the water inlet and drainage collecting channel from the upper part.

In the scheme, the arrangement of water discharged from the upper part of the bottom of the carbon pool water discharge channel can further ensure that the water discharge of the carbon pool or the water discharged from the carbon pool can be controlled to enter the sand pool by opening or closing the water discharge valve of the carbon pool, and the two-purpose valve is realized.

Preferably, the carbon pond unit comprises:

and the outer side wall is provided with a through hole higher than the carbon bed, and a liquid level reducing valve is arranged at the through hole.

The carbon pond water inlet and air inlet channel is arranged at the lower part of the carbon pond bottom plate and is communicated with the vertical water inlet channel.

The carbon tank water and gas distribution system is arranged below the carbon bed at the bottom of the carbon tank and is communicated with the water inlet channel of the carbon tank.

The carbon pool water collecting tank corresponds to and is communicated with the position of the carbon pool water passing hole, and the height of the carbon pool water collecting tank is higher than that of the upper part of the carbon pool water outlet drainage channel.

In the scheme, the carbon tank unit adopts the structure, so that water to be filtered can flow in the carbon tank unit from bottom to top, flows out of the water drainage channel through the carbon tank and finally flows back into the water inlet and drainage collecting channel.

Preferably, the sand pool unit includes:

the sand bed, sand pool water drainage tank sets up the upper end of sand bed.

The sand pool water holes are communicated with the water inlet and drainage collecting channel of the sand pool and the water drainage groove of the sand pool.

The sand pool water inlet and air inlet and water outlet channels are arranged below the bottom plate of the sand pool.

The sand pool water and gas distribution system is arranged below the sand bed at the bottom of the sand pool and is communicated with the water inlet and outlet channels of the sand pool.

In this scheme, the sand pool unit adopts above-mentioned structural style, can ensure to wait to filter water follow intake drainage and collect the canal and get into the sand pool unit through sand pool water drainage tank to flow from top to bottom in the sand pool unit, and finally through the play water unit discharge extremely outside the reverse series connection charcoal sand filter.

Preferably, the sand pool unit further comprises a sand pool overrun water inlet unit, and the overrun water inlet unit comprises:

the sand pool surpasses the water inlet channel;

the sand pool overrun water inlet valve is arranged on one side wall of the sand pool overrun water inlet channel, which is far away from the water inlet main channel.

The sand pool overrun water inlet weir is arranged at one end of the sand pool overrun water inlet valve (far away from the direction of the water inlet main channel and arranged at intervals with the sand pool overrun water inlet valve, and the sand pool overrun water inlet weir is communicated with the sand pool unit and the sand pool overrun water inlet channel.

The sand pool surpasses the water inlet guide pipe, the sand pool surpasses the water inlet guide pipe intercommunication the sand pool surpasses the water inlet channel with the sand pool unit is excessive through sand pool water drainage tank.

In this scheme, if because seasonal reason, wait that the quality of water of filtered water does not need or is unsuitable for carrying out advanced treatment, can surpass the water inlet unit through the sand basin and surpass the charcoal pond, directly get into the sand basin unit and filter, and set up more easily and surpass charcoal pond function, set up super sand basin and surpass the water inlet canal at the sand basin unit top, utilize space, area is not occupied.

A water filtration method using the reverse series charcoal filter described above, the water filtration method comprising performing at least one of the following modes:

and in the normal operation mode, water to be filtered flows out from the multifunctional water inlet and drainage channel unit, flows through the carbon pond unit from bottom to top, flows back to the multifunctional water inlet and drainage channel unit, flows through the sand pond unit from top to bottom, and finally is discharged out of the reverse series carbon sand filter pond through the water outlet unit.

And the partial overrun mode is adopted, and in the partial overrun mode, water to be filtered directly enters the sand pool unit for filtration, or a part of water to be filtered enters the carbon pool unit for filtration.

And in the back flushing mode of the sand pool unit, water in the sand pool unit flows through the sand pool unit from bottom to top and flows into the multifunctional water inlet and drainage channel unit.

The charcoal pool unit and the sand pool unit are in a simultaneous but separate flushing mode.

In the scheme, the method for filtering water by using the reverse series connection carbon sand filter can flexibly execute at least one of the modes according to the requirement, so that the reverse series connection carbon sand filter can treat various different water qualities, and simultaneously can have the function of flushing and cleaning the reverse series connection carbon sand filter, and further can greatly improve the applicability of the reverse series connection carbon sand filter.

Preferably, the normal operation mode includes the steps of:

s1, communicating the multifunctional water inlet and drainage channel unit, the carbon pool unit and the sand pool unit, and opening a water outlet unit;

s2, closing drainage passages of the carbon tank unit and the sand tank unit;

s3, enabling water to be filtered to enter a carbon pond unit from the multifunctional water inlet and drainage channel unit so as to start filtration;

the partial overrun mode of operation includes the steps of:

s10, disconnecting the multifunctional water inlet and drainage channel unit from the carbon tank unit to close the carbon tank unit or to partially close the carbon tank unit;

s20, directly feeding water to be filtered into the sand pool unit to filter out water.

The backwash mode of the sand pool unit comprises the following steps:

s100, cutting off water inflow of the carbon pond and opening a drainage passage of the sand pond unit;

s200, enabling water in the sand pool unit to flow through the sand pool unit from bottom to top and flow into the multifunctional water inlet and drainage channel unit;

the simultaneous but separate flushing mode of the carbon and sand tank units comprises the steps of:

s31, cutting off water inflow of the carbon pool, opening a carbon pool drainage and dewatering level valve, and reducing the water level of the carbon pool unit; opening a drainage passage of the sand pool unit (3);

s32, independently air flushing and independently water flushing the carbon pool; single water, gas flushing and water flushing of the sand pool;

s33, closing a drainage passage of the carbon tank unit (2), closing a drainage passage of the sand tank unit (3), and opening water inflow.

The invention has the positive progress effects that: the multifunctional water inlet and drainage canal unit is arranged in the middle and the carbon pool unit is arranged in the left and the right of the sand pool unit in a split way, so that the space of the multifunctional water inlet and drainage canal unit can be fully utilized, and various necessary facilities can be built in the space, so that the arrangement is more reasonable and compact, and the occupied area is smaller.

Drawings

FIG. 1 is a plan view of an embodiment of the reverse series connected sand filter of the present invention in accordance with a preferred embodiment of the present invention.

Fig. 2 is a section A-A of fig. 1.

FIG. 3 is a water flow path diagram of a reverse series connected sand filter in normal operation mode according to a preferred embodiment of the present invention.

FIG. 4 is a flow path diagram of a reverse series sand filter segment override mode of operation in accordance with a preferred embodiment of the present invention.

FIG. 5 is a flow path diagram of a reverse series connected sand filter unit backwash mode of a sand filter according to a preferred embodiment of the present invention.

FIG. 6 is a flow path diagram of a concurrent but separate flush mode of a reverse series of carbon sand filter carbon and sand tank units according to a preferred embodiment of the present invention.

Reference numerals illustrate:

multifunctional water inlet and drainage canal unit 1

Main water inlet channel 101

Inlet valve 102

Water inlet weir 103

Vertical water inlet channel 104

Carbon pond water outlet drainage canal 105

Carbon pond drain valve 106

Carbon pond drain pipe 107

Carbon pond outlet pipe 108

Water inlet and outlet collecting channel 109

Sand pool drain pipe 110

Sand pool drain valve 111

Sand pool drain main channel 112

Carbon pond drainage main channel 113

Carbon pool water level reducing valve 114

Sand pool overrun water inlet channel 115

Sand pool overrun water inlet valve 116

Sand pool overrun water inlet weir 117

Sand pit overrun water inlet guide pipe 118

Charcoal pool unit 2

Carbon pond water inlet air inlet channel 201

Carbon pond water and gas distribution system 202

Charcoal bed 203

Sump 204

Carbon pond water hole 205

Sand pool unit 3

Sand pit drainage channel 301

Sand bed 302

Sand pool water and gas distribution system 303

The sand pool enters water, enters air and exits the ditch 304.

Sand pool water hole 305

Water outlet unit 4

Sand pool water outlet valve 401

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

As shown in fig. 1 to 6, the present embodiment provides a reverse series connection type carbon sand filter, which comprises a carbon pool unit 2, a sand pool unit 3 and a water outlet unit 4, the reverse series connection type carbon sand filter further comprises a multifunctional water inlet and water outlet channel unit 1, the multifunctional water inlet and water outlet channel unit 1 is arranged between the carbon pool unit 2 and the sand pool unit 3, the multifunctional water inlet and water outlet channel unit 1 is communicated with the carbon pool unit 2 and the sand pool unit 3, wherein the multifunctional water inlet and water outlet channel unit 1 comprises a water inlet main channel 101 and a sand pool water inlet and water outlet collecting channel 109. The water inlet main channel 101 is communicably arranged with the bottom of the carbon pond unit 2, and the water inlet main channel 101 is used for supplying water to the bottom of the carbon pond unit 2. The sand pool water inlet and drainage collecting channel 109 is arranged at the lower end of the water inlet main channel 101, and the sand pool water inlet and drainage collecting channel 109 is communicated with the carbon pool unit 2 and the sand pool unit 3.

The water inlet main channel 101 is used for supplying water to the bottom of the carbon pond unit 2, the lower end of the water inlet main channel 101 is provided with a sand pond water inlet and drainage collecting channel 109, the reverse series carbon sand filter is configured such that water to be filtered flows out of the water inlet main channel 101 in the multifunctional water inlet and drainage channel unit 1 from bottom to top, flows through the carbon pond unit 2 from bottom to back, flows into the sand pond water inlet and drainage collecting channel 109 in the multifunctional water inlet and drainage channel unit 1, then the water to be filtered starts from the sand pond water inlet and drainage collecting channel 109, then flows through the sand pond unit 3 from top to bottom, and finally is discharged out of the reverse series carbon sand filter through the water outlet unit 4.

In the embodiment, the multifunctional water inlet and drainage canal unit 1 is arranged in the middle, the carbon tank unit 2 and the sand tank unit 3 are arranged in a left-right mode, the space of the multifunctional water inlet and drainage canal unit 1 can be fully utilized, and various necessary facilities can be built in the space, so that the arrangement is more reasonable and compact, and the occupied area is smaller. And the arrangement of water outlet at the upper part of water inlet at the bottom of the carbon pool unit 2, and the water outlet pipe can also reduce the carbon leakage of the carbon pool into the sand pool.

Further, in the present embodiment, the multifunctional water inlet and drainage canal unit 1 further includes a vertical water inlet channel 104, a water inlet valve 102, a water inlet weir 103, a sand pool drain pipe 110, a sand pool drain valve 111, a carbon pool drain pipe 107, a carbon pool drain valve 106, a carbon pool water outlet and drainage canal 105, and a carbon pool water outlet pipe 108.

The vertical water inlet channel 104 is communicated with the water inlet main channel 101, and the vertical water inlet channel 104 is arranged between the water inlet main channel 101 and the carbon pool unit 2; the inlet valve 102 is provided on a side wall of the inlet main channel 101 near the carbon pond unit 2. The water inlet weir 103 is positioned in the vertical water inlet channel 104 and is arranged on one side of the water inlet valve 102 close to the direction of the charcoal pool unit 2 and is spaced from the water inlet valve 102. Wherein, the main water inlet channel 101, the water inlet valve 102, the water inlet weir 103 and the vertical water inlet channel 104 are sequentially arranged to form a water inlet channel of the carbon pond.

The carbon pond water outlet and drainage canal 105 is arranged on the outer side wall of the carbon pond unit 2, which is close to the multifunctional water inlet and drainage canal unit 1, the upper half part of the outer side wall is provided with a carbon pond water hole 205, the carbon pond water hole 205 is communicated with the carbon pond water outlet and drainage canal 105 and the carbon pond unit 2, and the carbon pond water outlet and drainage canal 105 is communicated with the carbon pond water drainage canal 107.

The carbon pond water outlet pipe 108 communicates the carbon pond water outlet drainage canal 105 with the water inlet drainage collecting canal 109.

Specifically, as shown in fig. 3, the reverse series-connection carbon sand filter is configured such that water to be filtered flows out of the water inlet main channel 101 in the multifunctional water inlet and drainage channel unit 1, flows into the water inlet weir 103 through the water inlet valve 102, flows into the vertical water inlet channel 104, enters the bottom of the carbon pond unit 2, flows through the carbon pond unit 2 from bottom to top, flows into the carbon pond water outlet and drainage channel 105, flows into the sand pond water inlet and drainage collecting channel 109 through the carbon pond water outlet pipe 108, starts from the sand pond water inlet and drainage collecting channel 109, flows into the sand pond unit 3 from top to bottom through the drainage channel on the sand bed, and finally is discharged out of the reverse series-connection carbon sand filter through the water outlet unit 4.

In this embodiment, the arrangement of the bottom water draining and draining channel 105 and the upper water draining can further ensure that the water draining of the carbon pond or the water draining of the carbon pond can be controlled to enter the sand pond by opening or closing the water draining valve 106 of the carbon pond, so that the carbon is "dual-purpose" and the carbon is also allowed to sink and drain in the channel, and the carbon is prevented from entering the sand pond.

In other embodiments, the multifunctional water inlet and drainage channel unit 1 may further include: a sand pool drain main channel 112 and a carbon pool drain main channel 113. The sand pool water drain main channel 112 is provided at the lower end of the sand pool water inlet drain collecting channel 109 and is communicably provided with the sand pool water inlet drain collecting channel 109 to constitute a backwash flow path of the sand pool unit 3. The main carbon pond drain channel 113 is arranged at the lower end of the main sand pond drain channel 112, and the main carbon pond drain channel 113 and the carbon pond unit 2 can be communicated to form a flushing flow path of the carbon pond unit 2.

In the present embodiment, a backwash flow path of the sand tank unit 3 is provided in the multifunctional water inlet and drainage canal unit 1, which is composed of a sand tank water inlet and drainage collecting canal 109 and a sand tank drainage main canal 112 which can be communicated with the sand tank water inlet and drainage collecting canal 109 and is provided at the lower end thereof; and a flushing flow path of the carbon pond unit 2 which is composed of the carbon pond water outlet drainage canal 105 and the carbon pond water drainage canal 113 which can be communicated with the lower end of the sand pond water drainage canal, thereby further improving the functions of the multifunctional water inlet drainage canal unit 1.

The sand pool drain pipe 110 communicates with the water inlet and drain collecting channel 109 and the sand pool drain main channel 112. The sand pool drain valve 111 is provided to the sand pool drain pipe 110. Wherein the sand pool drain pipe 110 and the sand pool drain valve 111 constitute a sand pool drain passage.

The carbon pond drain pipe 107 communicates the carbon pond drain main channel 113 with the bottom of the carbon pond unit 2 effluent drain channel 105. The carbon pond drain valve 106 is arranged on the carbon pond drain pipe 107. Wherein the carbon pond drain valve 106 and the carbon pond drain pipe 107 constitute a carbon pond drain passage.

In this embodiment, the water draining of the carbon tank unit 2 or the water outlet of the carbon tank unit 2 into the sand tank unit 3 can be controlled by opening or closing the carbon tank drain valve 106, so that the flexible control of the working mode of the carbon tank unit 2 can be realized. The water inflow and drainage collecting channel 109 of the sand pool plays the roles of communicating and switching water inflow and drainage of the sand pool and draining a main channel of drainage, and can not be poured back to the carbon pool, and the water drain valve 111 of the sand pool also plays the role of 'one valve for two purposes', and the opening or closing of the water drain valve 111 of the sand pool can control water inflow or drainage of the sand pool.

The carbon pond unit 2 includes: the device comprises a carbon bed 203, a carbon pool water inlet channel 201, a carbon pool water and gas distribution system 202 and a carbon pool water collecting tank 204.

A through hole is opened in the outer sidewall at a position higher than the char bed 203, and a liquid level lowering valve 114 is provided at the through hole.

The water inlet channel is arranged at the bottom of the carbon bed 203, and the carbon pool water inlet channel 201 is communicated with the vertical water inlet channel 104.

The carbon pool water and gas distribution system 202 is arranged between the carbon pool water inlet channel 201 and the carbon bed 203.

The carbon pool water collecting tank 204 corresponds to and communicates with the position of the carbon pool water passing hole 205, and the height of the carbon pool water collecting tank 204 is higher than the upper part of the carbon pool water outlet drainage canal 105.

In this embodiment, the above structural form of the carbon tank unit 2 is adopted, so that water to be filtered can flow from bottom to top in the carbon tank unit 2, that is, as shown in fig. 3, the reverse series carbon sand filter is configured to flow through the carbon tank water inlet channel 201, the carbon tank water distribution and air distribution system 202, the carbon bed 203 and the carbon tank water collecting channel 204 in sequence inside the carbon tank unit, flows into the carbon tank water outlet drainage channel 105 through the carbon tank water outlet holes 205, and finally flows back into the water inlet drainage collecting channel 109.

As shown in fig. 2, the sand pool unit 3 includes: sand bed 302, sand pool water drainage tank 301, sand pool water hole, sand pool water inlet and outlet channel 304, sand pool water distribution and gas distribution system 303.

The sand pool drainage tank 301 is arranged at the upper end of the sand bed 302; the sand pool water holes communicate the sand pool water inlet and outlet collecting channel 109 and the sand pool water discharge groove 301.

The water inlet and air inlet and outlet channels of the sand pool are arranged below the bottom plate of the sand pool and are communicated with the water outlet unit 4.

The sand pool water and gas distribution system 303 is arranged below the sand pool bottom plate and the sand bed, and is communicated with the sand pool water inlet and outlet channels.

In this embodiment, as shown in fig. 3, the reverse series charcoal sand filter is configured such that water to be filtered in the sand tank unit 3 flows from the water inlet and outlet collecting channel 109 through the sand tank water passing holes 305 from top to bottom through the sand tank water draining channel 301, the sand bed 302, the sand tank water and gas distribution system 303, and the sand tank water inlet and outlet channel 304 in this order. And finally discharged out of the reverse series carbon sand filter tank through the water outlet unit 4.

As shown in fig. 2, the sand pool unit 3 further includes a sand pool overrun water inlet unit including a sand pool overrun water inlet channel 115, a sand pool overrun water inlet valve 116, a sand pool overrun water weir 117, and a sand pool overrun water inlet guide pipe.

The sand pool overrun inlet valve 116 is arranged on one side wall of the sand pool overrun inlet channel 115, which is far away from the inlet main channel 101; the sand pool overrun water inlet weir 117 is arranged at one end of the sand pool overrun water inlet valve 116 far away from the water inlet main channel 101 and is arranged at intervals with the sand pool overrun water inlet valve 116, and the sand pool overrun water inlet weir 117 is communicated with the sand pool unit 3 and the sand pool overrun water inlet channel 115; the sand pool overrun water inlet guide pipe communicates with the sand pool overrun water inlet channel 115 and the sand pool unit 3.

In this embodiment, if the water quality of the water to be filtered does not need or is not suitable for advanced treatment due to seasonal reasons, the water can directly enter the sand pool unit 3 to be filtered through the sand pool override water inlet unit override carbon pool, and the override carbon pool function is easier to set, and the super sand pool override water inlet channel 115 is set on the top of the sand pool unit 3, so that the space is utilized and the occupied area is not occupied.

The present embodiment also provides a water filtration method using the reverse series charcoal sand filter described above, the water filtration method comprising performing at least one of the following modes:

the water flow path is in a normal operation mode shown by a two-dot chain line with an arrow in fig. 3, in the normal operation mode, water to be filtered flows out from the multifunctional water inlet and drainage channel unit 1, flows through the carbon tank unit 2 from bottom to top, flows back to the multifunctional water inlet and drainage channel unit, flows through the sand tank unit 3 from top to bottom, and finally is discharged out of the reverse series carbon sand filter tank through the water outlet unit 4.

The water flow path is in a partial overrun mode shown by a two-dot chain line with an arrow in fig. 4, and in the partial overrun mode, water to be filtered directly enters the sand tank unit 3 for filtration, or a part of water to be filtered enters the carbon tank unit 2 for filtration.

The water flow path is shown as a double-dot chain line with an arrow in fig. 5 and shows a backwash mode of the sand tank unit 3, and in the backwash mode of the sand tank unit 3, water in the sand tank unit 3 flows through the sand tank unit 3 from bottom to top and flows into the multifunctional water inlet and drainage channel unit 1.

And a simultaneous but separate flushing mode of the carbon and sand tank units in which the water flow paths are shown by two-dot chain lines with arrows in fig. 6.

In this embodiment, the method for filtering water by using the reverse series connection carbon sand filter can flexibly execute at least one of the modes according to the needs, so that the reverse series connection carbon sand filter can treat various different water qualities, and meanwhile, the reverse series connection carbon sand filter can have the function of flushing and cleaning the reverse series connection carbon sand filter, and the applicability of the reverse series connection carbon sand filter can be greatly improved.

As shown in fig. 3, the normal operation mode includes the steps of:

s1, communicating the multifunctional water inlet and drainage channel unit 1, the carbon tank unit 2 and the sand tank unit 3, and opening the water outlet unit 4.

S2, closing drainage passages of the carbon tank unit 2 and the sand tank unit 3;

specifically, S1 and S2 are opening the single-cell inlet valve 102 door, closing the carbon pond drain valve 106 door, closing the sand pond drain valve 111 door, closing the carbon pond water-lowering valve 114 door, and opening the sand pond outlet valve 401 door.

And S3, enabling water to be filtered to enter the carbon pond unit 2 from the middle water inlet main channel 101 to start filtering.

Specifically, S3 is to make water to be treated enter the single-lattice water inlet valve 102 from the middle water inlet main channel 101, enter the water inlet weir 103, enter the carbon pond water inlet air inlet channel 201 downwards and rightwards through the water distribution and air distribution system, enter the water collecting tank 204 after being treated by the carbon bed 203, enter the carbon pond water outlet drainage channel 105 through the water passing holes, enter the sand pond water inlet drainage collecting channel 109 through the water outlet pipe, turn water through the sand pond drainage channel 301 through the water passing holes, filter downwards through the sand bed 302, enter the sand pond water inlet air inlet and outlet channel through the water distribution and air distribution system, enter the water outlet unit 4 through the sand pond water outlet valve 401 and enter the water outlet main channel.

As shown in fig. 4, the partial overrun mode of operation includes the steps of:

s10, the communication between the multifunctional water inlet and drainage channel unit 1 and the carbon pool unit 2 is disconnected to close the carbon pool unit 2, or the carbon pool unit 2 is partially closed.

Specifically, S10 is to open the single-grid sand pool beyond the water inlet valve 116, and the water to be filtered enters the sand pool to be directly filtered; the inlet valve 102 may be opened at a small angle while the sand pool is opened at a small angle beyond the inlet valve 116 for mixed water filtration,

s20, directly feeding water to be filtered into the sand pool unit 3 to filter out water.

As shown in fig. 5, the backwash mode of the sand tank unit 3 includes the steps of:

s100, cutting off water inflow and opening a drainage passage of the sand pool unit 3;

and S200, enabling water in the sand pool unit 3 to flow through the sand pool unit 3 from bottom to top and flow into the multifunctional water inlet and drainage channel unit 1.

Specifically, S100 and S200 are closing the water inlet valve 102, closing the water outlet valve 401 of the sand pool, opening the water outlet valve 111 of the sand pool at the bottom of the water inlet and water outlet collecting channel 109 of the sand pool, performing air-water back flushing of the sand pool, discharging back flushing water of the sand pool to the water outlet collecting channel 109 of the sand pool, the water outlet pipe 110 of the sand pool and the water outlet valve 111 of the sand pool, discharging to the water outlet main channel 112 of the sand pool at the lower layer of the collecting channel, and closing the water outlet valve 111 of the sand pool after back flushing is stopped. The water inlet valve 102 is opened and water is restored.

As shown in fig. 6, the simultaneous but separate flushing mode of the char and sand tank units 2, 3 includes the steps of:

s31, stopping water inflow, and reducing the water level of the carbon pool unit 2 and the multifunctional water inflow and drainage channel unit 1;

specifically, S31 is to close the single-grid water inlet valve 102, close the sand pool water outlet valve 401, open the carbon pool water outlet and drainage valve 106 at the bottom of the carbon pool water outlet and drainage channel 105 to drain the water outlet and drainage channel, open the carbon pool water lowering valve 114 to lower the water level of the carbon pool surface, open the water outlet valve 111 at the bottom of the water inlet and drainage collecting channel 109 of the sand pool, and lower the water level of the collecting channel.

S32, fully opening the water inlet valve 102, and flushing by water alone; synchronously flushing the sand pool;

s33, closing a water drainage passage of the carbon pool unit 2, and improving the water level of the carbon pool unit 2.

Specifically, S33 is to close the carbon pool drain valve 106, raise the water level in the carbon pool water outlet drain channel 105 to the upper carbon pool water outlet pipe 108, recover water, and adjust the opening degree of the inlet valve 102 door of each grid to be normal.

The carbon pool is washed and the sand pool gas is opened for washing for a plurality of times;

s33.1, opening a water flushing valve to realize small water quantity gas-water simultaneous flushing; the drain water passes through the sand pool drain tank 301, the water inlet drain collecting channel 109, the sand pool drain pipe 110, and the sand pool drain valve 111, and is discharged to the sand pool drain main channel 112 below the water collecting and drain collecting channel 109.

S33.2, closing an air flushing valve, increasing the water flushing strength and independently flushing;

s33.3, closing a water flushing valve, opening an exhaust valve, exhausting, and closing the valve, and standing for water outlet of the carbon pool;

restoring normal operation

S34, water discharged from the carbon pool enters the sand pool, and the carbon sand pool resumes normal operation.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (7)

1. The utility model provides a reverse series connection charcoal sand filter, includes charcoal pond unit (2), sand pond unit (3) and play water unit (4), its characterized in that, reverse series connection charcoal sand filter still includes multi-functional water drainage canal unit (1) of intaking, multi-functional water drainage canal unit (1) set up charcoal pond unit (2) with between sand pond unit (3), multi-functional water drainage canal unit (1) intercommunication charcoal pond unit (2) with sand pond unit (3), reverse series connection charcoal sand filter is configured to wait to filter water and flows from multi-functional water drainage canal unit (1), from down to up flow charcoal pond unit (2) to flow back multi-functional water drainage canal unit (1), then from top to down flow back sand pond unit (3), finally warp water drainage unit (4) discharge to outside the reverse series connection charcoal sand filter, multi-functional water drainage canal unit (1) include:

a water inlet main channel (101) which is communicated with the bottom of the carbon tank unit (2), wherein the water inlet main channel (101) is used for supplying water to the bottom of the carbon tank unit (2);

a sand pool water inlet and drainage collecting channel (109), wherein the sand pool water inlet and drainage collecting channel (109) is arranged at the lower end of the water inlet main channel (101), and the sand pool water inlet and drainage collecting channel (109) is communicated with the carbon pool unit (2) and the sand pool unit (3);

and/or the number of the groups of groups,

the sand pool drainage main channel (112) is arranged at the lower end of the sand pool water inlet and drainage collecting channel (109) and can be communicated with the sand pool water inlet and drainage collecting channel (109) to form a sand pool unit backwash flow path;

a carbon pond drainage main channel (113), wherein the carbon pond drainage main channel (113) is arranged at the lower end of the sand pond drainage main channel (112), and the carbon pond drainage main channel (113) and the carbon pond unit (2) can be communicated to form a carbon pond unit back flushing flow path;

the multifunctional water inlet and drainage canal unit (1) further comprises:

a vertical water inlet channel (104), wherein the vertical water inlet channel (104) is communicated with the water inlet main channel (101), and the vertical water inlet channel (104) is arranged between the water inlet main channel (101) and the carbon tank unit (2);

the water inlet valve (102) is arranged on one side wall of the water inlet main channel (101) close to the carbon tank unit (2);

an inlet weir (103), wherein the inlet weir (103) is positioned in the vertical water inlet channel (104) and is arranged at one side of the inlet valve (102) close to the direction of the carbon tank unit (2) and is kept at a distance from the inlet valve (102);

the water inlet main channel (101), the water inlet valve (102), the water inlet weir (103) and the vertical water inlet channel (104) are sequentially arranged to form a water inlet passage of the carbon pond;

the multifunctional water inlet and drainage canal unit (1) further comprises:

the carbon pond water outlet drainage canal (105), the carbon pond water outlet drainage canal (105) is arranged on the outer side wall of the carbon pond unit (2) close to the multifunctional water inlet drainage canal unit (1), a carbon pond water outlet hole (205) is formed in the upper half part of the outer side wall, the carbon pond water outlet hole (205) is communicated with the carbon pond water outlet drainage canal (105) and the carbon pond unit (2), and the carbon pond water outlet drainage canal (105) is communicated with the carbon pond water outlet pipe (107);

a carbon pond water outlet pipe (108), wherein the carbon pond water outlet pipe (108) is communicated with the carbon pond water outlet drainage canal (105) and the sand pond water inlet drainage collecting canal (109);

a carbon pond drain pipe (107), wherein the carbon pond drain pipe (107) is communicated with the carbon pond drain main channel (113) and the sand pond water inlet drain collecting channel (109);

a sand pool drain pipe (110), the sand pool drain pipe (110) communicating the sand pool water inlet and drain collecting channel (109) and the sand pool drain main channel (112);

a sand pool drain valve (111), wherein the sand pool drain valve (111) is arranged on the sand pool drain pipe (110);

wherein the sand pool drain pipe (110) and the sand pool drain valve (111) constitute a sand pool drain passage.

2. A reverse series connected carbon sand filter according to claim 1, wherein the carbon tank unit (2) comprises:

a carbon bed (203), a through hole is arranged on the outer side wall of the carbon pool unit (2) at a position higher than the carbon bed (203), and a carbon pool water-lowering valve (114) is arranged at the through hole;

a carbon pool water inlet and air inlet channel (201), wherein the carbon pool water inlet and air inlet channel (201) is arranged below the bottom plate of the carbon pool unit (2), and the carbon pool water inlet and air inlet channel (201) is communicated with the vertical water inlet channel (104);

the carbon tank water and gas distribution system (202) is arranged at the bottom of the carbon tank unit (2) and below the carbon bed (203), and the carbon tank water and gas distribution system (202) is communicated with a carbon tank water inlet channel (201);

the carbon pool water collecting tank (204), the carbon pool water collecting tank (204) corresponds to and is communicated with the position of the carbon pool water hole (205), and the height of the carbon pool water collecting tank (204) is higher than the upper part of the carbon pool water outlet drainage channel (105).

3. A reverse series charcoal filter according to claim 1, wherein the sand pool unit (3) comprises:

a sand bed (302);

the sand pool drainage tank (301), the sand pool drainage tank (301) is arranged at the upper end of the sand bed (302), and the sand pool drainage tank (301) is communicated with the sand pool water inlet and drainage collecting channel (109);

a sand tank water hole (305), wherein the sand tank water hole (305) is communicated with the sand tank water inlet and drainage collecting channel (109) and the sand tank drainage tank (301);

the sand pool water inlet and air inlet and water outlet channel (304), and the sand pool water inlet and air inlet and water outlet channel (304) is arranged below the bottom plate of the sand pool unit (3) and is communicated with the water outlet unit (4);

the sand pool water and gas distribution system (303), the sand pool water and gas distribution system (303) is arranged at the bottom of the sand pool unit (3) and below the sand bed (302), and the sand pool water and gas distribution system (303) is communicated with the sand pool water inlet and air inlet and outlet channels (304).

4. A reverse series charcoal filter according to claim 3, wherein the sand pool unit (3) further comprises a sand pool overrun water inlet unit comprising:

the sand pool is beyond the water inlet channel (115);

a sand pool overrun water inlet valve (116), wherein the sand pool overrun water inlet valve (116) is arranged on one side wall of the sand pool overrun water inlet channel (115) far away from the water inlet main channel (101);

the sand pool overrun water inlet weir (117), the sand pool overrun water inlet weir (117) is arranged at one end of the sand pool overrun water inlet valve (116) far away from the direction of the water inlet main channel (101) and is arranged at intervals with the sand pool overrun water inlet valve (116), and the sand pool overrun water inlet weir (117) is communicated with the sand pool unit (3) and the sand pool overrun water inlet channel (115);

the sand pool overrun water inlet guide pipe (118), and the sand pool overrun water inlet guide pipe (118) is communicated with the sand pool overrun water inlet channel (115) and the sand pool unit (3).

5. A water filtration method using the reverse series charcoal filter according to any one of claims 1-4, the water filtration method comprising performing at least one of the following modes:

a normal operation mode, in which water to be filtered flows out from the multifunctional water inlet and drainage channel unit (1), flows through the carbon pond unit (2) from bottom to top, flows back to the multifunctional water inlet and drainage channel unit (1), flows through the sand pond unit (3) from top to bottom, and finally is discharged out of the reverse series carbon sand filter pond through the water outlet unit (4);

a partial overrun mode, in which water to be filtered directly enters the sand pool unit for filtration, or a part of water to be filtered enters the carbon pool unit for filtration;

a sand pool unit back flushing mode, wherein water in the sand pool unit (3) flows through the sand pool unit (3) from bottom to top and flows into the multifunctional water inlet and drainage channel unit (1);

the charcoal pool unit and the sand pool unit are in a simultaneous but separate flushing mode.

6. The water filtration method of claim 5, wherein the normal operation mode comprises the steps of:

s1, communicating the multifunctional water inlet and drainage channel unit (1), the carbon tank unit (2) and the sand tank unit (3), and opening a water outlet unit (4);

s2, closing drainage passages of the carbon tank unit (2) and the sand tank unit (3);

s3, enabling water to be filtered to enter the carbon tank unit (2) from the multifunctional water inlet and drainage channel unit (1) so as to start filtering;

the partial overrun mode of operation includes the steps of:

s10, disconnecting the communication between the multifunctional water inlet and drainage channel unit (1) and the carbon tank unit (2) so as to close the carbon tank unit (2) or partially close the carbon tank unit (2);

s20, directly feeding water to be filtered into the sand pool unit (3) to filter out water.

7. The water filtration method of claim 5, wherein the sand tank unit backwash mode includes the steps of:

s100, cutting off water inflow and opening a drainage passage of the sand pool unit (3);

s200, enabling water in the sand pool unit (3) to flow through the sand pool unit (3) from bottom to top and flow into the multifunctional water inlet and drainage channel unit (1);

the simultaneous but separate flushing mode of the carbon and sand tank units comprises the steps of:

s31, cutting off water inflow, opening a drainage channel of the carbon tank unit (2), and opening a drainage channel of the sand tank unit (3);

s32, independently air flushing and independently water flushing the carbon pool; the sand pool is washed by water alone, and air flushing and water flushing are carried out simultaneously;

s33, closing a drainage passage of the carbon tank unit (2), closing a drainage passage of the sand tank unit (3), and opening water inflow.