CN114890571A - Reverse series connection carbon sand filter tank and water filtering method - Google Patents

Abstract

The invention provides a reverse series connection carbon sand filter tank and a water filtering method, wherein the reverse series connection carbon sand filter tank comprises a carbon tank unit, a sand tank unit and a water outlet unit, the reverse series connection carbon sand filter tank also comprises a multifunctional water inlet and outlet channel unit, the multifunctional water inlet and outlet channel unit is arranged between the carbon tank unit and the sand tank unit, and the reverse series connection carbon sand filter tank is configured in such a way that water to be filtered flows out of the multifunctional water inlet and outlet channel unit, flows through the carbon tank unit from bottom to top, flows back to the multifunctional water inlet and outlet channel unit, then flows through the sand tank unit from top to bottom, and is finally discharged out of the reverse series connection carbon sand filter tank through the water outlet unit. The multifunctional water inlet and drainage channel unit is arranged in the middle, the carbon pool unit and the sand pool unit are arranged in rows and columns, so that the space of the multifunctional water inlet and drainage channel unit can be fully utilized, various necessary facilities can be built in the space, 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 feed water treatment, in particular to a reverse series connection carbon sand filter and a water filtering method.

Background

At present, an ozone biological activated carbon process and a sand filter process are mostly adopted in advanced treatment, sewage plant treatment and special water treatment of a water works, 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 substances in water. The biological activated carbon adsorption tank in the ozone biological activated carbon process has two modes of a downward flow fixed bed and an upward flow fluidized bed. The biological activated carbon adsorption tank adopting a downward flow fixed bed is common, but in recent years, the biological activated carbon adsorption tank adopting an upward flow fluidized bed is 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 the advantages that: firstly, the upward flow activated carbon adsorption tank has good expansion rate, 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 can fully play a role, and the removal rate of organic matters is improved; secondly, the upward flow activated carbon adsorption tank has high use efficiency, high flow speed and small occupied area; thirdly, the loss of the water head of the upward flow activated carbon adsorption tank is relatively small and is about 1.0m to 1.2 m.

Patent No. CN202022468558.6 discloses a take charcoal sand shuangpin filtering pond of central canal, and its scheme is that the trompil intercommunication of partition wall is passed through with charcoal pond and sand pond, and pending water enters into the sand pond after getting into the charcoal pond earlier from the inlet channel, and the main canal setting of intaking is in the leftmost side, and the charcoal pond setting is in the centre, and the sand pond setting is at the arrangement mode of the cisoid series connection on rightmost side. However, the layout mode of the carbon sand filter tanks connected in series in the forward direction is not compact enough, the sand tank is convenient to set to exceed the channel when the carbon tank needs to be exceeded, the occupied area is large, and the limitation is large when the water plant is actually arranged.

Disclosure of Invention

The invention aims to overcome the defects that the carbon sand filter tank is not compact in structure, large in occupied area and inconvenient to arrange surpass channels when a forward series arrangement mode is adopted, and provides a reverse series carbon sand filter tank and a water filtering method.

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

the utility model provides a reverse series connection charcoal sand filtering pond, includes charcoal pond unit, sand pond unit and the unit of going out water, reverse series connection charcoal sand filtering pond still includes multi-functional water drainage canal unit of intaking, multi-functional water drainage canal unit of intaking sets up the charcoal pond unit with between the sand pond unit, multi-functional water drainage canal unit intercommunication of intaking charcoal pond unit with the sand pond unit, reverse series connection charcoal sand filtering pond is configured to treat the drainage follow multi-functional water drainage canal unit of intaking flows out, by lower supreme flowing through the charcoal pond unit, flow back multi-functional water drainage canal unit of intaking, then flow through from top to bottom again the sand pond unit, final warp it discharges extremely to go out the unit of water reverse series connection charcoal sand filtering outside the pond.

In this scheme, multi-functional water drainage canal unit is placed in the middle, the charcoal pond unit, and arranging about the sand pond unit divides row can make full use of multi-functional water drainage canal unit's space of intaking, can build various necessary facilities in this space to make arrange more rationally compacter, it can be littleer to take up an area of. The water outlet pipe of the water outlet and drainage channel of the carbon pool unit is connected to the sand pool unit from the upper part, and the water outlet pipe is connected to the main carbon drainage channel from the bottom of the water outlet and drainage channel, so that the carbon in the carbon pool is sunk to the bottom of the channel and is drained, and the water can be prevented from entering the sand pool.

Preferably, the multi-functional water inlet and drain channel unit includes:

the main canal of intaking, the main canal of intaking with the bottom of carbon pond unit can communicate the setting, the main canal of intaking is used for to the bottom of carbon pond unit supplies water.

The sand pond drainage of intaking collects the canal, the sand pond drainage of intaking collects the canal and locates the lower extreme of total canal of intaking, the sand pond drainage of intaking collects the canal intercommunication the charcoal pond unit with the sand pond unit.

In this scheme, multi-functional water drainage canal unit of intaking includes the main canal of intaking, the main canal of intaking with the bottom of carbon pond unit can communicate the setting, the main canal of intaking be used for to the bottom of carbon pond unit supplies water, is equipped with the sand pond at the lower extreme of the main canal of intaking and intakes the drainage and collects the canal, reverse series connection carbon sand filtering pond is configured to wait to cross the drainage and follows the outflow of the main canal of intaking in the multi-functional water drainage canal unit is by supreme flowing through carbon pond unit, cocurrent flow returns the canal is collected to the sand pond water drainage in the multi-functional water drainage canal unit of intaking.

The multi-functional water drainage ditch unit of intaking still includes:

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

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

In the scheme, a sand pool unit backwashing flow path which is formed by the sand pool water inlet and outlet collecting channel and a sand pool water outlet main channel which can be communicated with the sand pool water inlet and outlet collecting channel and is arranged at the lower end of the sand pool water inlet and outlet collecting channel is arranged in the multifunctional water inlet and outlet channel unit; and include the charcoal pond goes out water drainage canal and can communicate the charcoal pond unit that sets up the charcoal pond water drainage main canal common constitution of the main canal lower extreme of sand pond water drainage and wash the flow path to can perfect the function of multi-functional water drainage canal unit of intaking.

Preferably, the multi-functional water inlet and drain channel 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 pond units.

And 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 pool unit, and keeps a gap with the water inlet valve.

The water inlet main channel, the water inlet valve, the water inlet weir and the vertical water inlet channel are sequentially arranged to form a carbon pool water inlet passage.

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

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

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

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

In this scheme, can control charcoal pond unit drainage or charcoal pond unit play water and get into sand pond unit through opening or closing of charcoal pond drain valve, "a valve is dual-purpose", can realize the nimble control to charcoal pond unit mode of operation. The sand pond intake and drainage collects the canal and communicates with the charcoal pond outlet pipe respectively, communicates with the sand pond water drainage tank and communicates with the sand pond drainage main canal, has played the effect of intercommunication, switching and drainage main canal, and can not fall back to the charcoal pond to the sand pond drain valve has also played "a valve is dual-purpose", and opening or closing of sand pond drain valve can control the sand pond and intake or the drainage.

Preferably, the multi-functional water inlet and drain channel unit further comprises:

charcoal pond play water drainage canal, charcoal pond play water drainage canal locates the charcoal pond unit is close to the lateral wall of multi-functional water drainage canal unit of intaking, the first half of lateral wall is equipped with the charcoal pond and crosses the water hole, the charcoal pond crosses the water hole intercommunication the charcoal pond play water drainage canal with charcoal pond unit upper portion water catch bowl one-to-one, the charcoal pond play water drainage canal with the charcoal pond drain pipe is linked together.

And 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 this scheme, the charcoal pond goes out the arrangement of water drainage upper portion play water of drainage ditch bottom, can further ensure to realize opening or closing through the charcoal pond drain valve and can control the charcoal pond drainage or the charcoal pond goes out water and get into the sand pond, "a valve is dual-purpose".

Preferably, the carbon cell unit includes:

and a through hole is formed in the position, higher than the carbon bed, of the outer side wall, and a liquid level reducing valve is arranged at the through hole.

The carbon pond inlet channel, the inlet channel is located carbon pond bottom plate lower part, the carbon pond inlet channel with vertical inhalant canal is linked together.

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

The carbon pool water catch bowl, the carbon pool water catch bowl with the position in carbon pool water hole is corresponding and the intercommunication, the carbon pool water catch bowl height is higher than carbon pool goes out water drainage canal upper portion.

In this scheme, the charcoal pond unit adopts above-mentioned structural style, can guarantee to wait to cross the water and can flow by supreme down in the charcoal pond unit, through charcoal pond play water drainage canal to finally flow back to in the water drainage of intaking collects the canal.

Preferably, the sand tank unit includes:

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

The water hole is crossed to the sand pond, the water hole intercommunication is crossed to the sand pond is intake the drainage and is catchment the ditch with sand pond water drainage tank.

The sand pool inlet and outlet channel is arranged below the sand pool bottom plate.

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

In this scheme, the sand pond unit adopts above-mentioned structural style, can ensure to wait to filter the drainage follow it collects the canal and gets into the sand pond unit through sand pond water drainage tank to from last to flowing down in the sand pond unit, and finally discharge through the water outlet unit outside the reverse series connection charcoal sand filter.

Preferably, the sand pool unit further comprises a sand pool overrunning water inlet unit, wherein the overrunning water inlet unit comprises:

the sand pool surpasses the water inlet channel;

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

The sand pool surpasses the water inlet weir, the sand pool surpasses the water inlet valve to locate the sand pool (keep away from the one end of water inlet main canal direction and with the sand pool surpasses the water inlet valve and keep the interval setting, the sand pool surpasses the water inlet weir intercommunication the sand pool unit with the sand pool surpasses the inlet channel.

The sand pool surmounts the water inlet guide pipe, and the sand pool surmounts the water inlet guide pipe to be communicated with the sand pool surmounting water inlet channel and the sand pool unit and is excessive through a sand pool water drainage groove.

In this scheme, if because of seasonal reason, treat that the quality of water of straining water does not need or when unsuitable carrying out advanced treatment, can surmount the intake unit through the sand pond and surmount the carbon pond, directly get into the sand pond unit and filter, and set up more easily and surmount the carbon pond function, set up the super sand pond on sand pond unit top and surmount the intake canal, utilize space, area not.

A water filtration method using the above-mentioned reverse-flow in-series carbon sand filter, the water filtration method comprising performing at least one of the following modes:

normal operating mode under the normal operating mode, treat that the drainage water is followed multi-functional water drainage canal unit of intaking flows through by lower supreme charcoal pond unit flows through to the return multi-functional water drainage canal unit of intaking then from top to bottom flow through the sand pond unit, finally the warp it discharges extremely outside the reverse series connection charcoal sand filtering pond to go out the water unit.

And a partial overrunning operation mode, wherein water needing to be filtered directly enters the sand pool unit for filtering or a part of water to be filtered enters the carbon pool unit for filtering.

And in the sand pool unit backwashing mode, water in the sand pool unit flows through the sand pool unit from bottom to top and flows into the multifunctional water inlet and outlet channel unit.

And a simultaneous but separate flushing mode of the char cell unit and the sand cell unit.

In this scheme, use foretell reverse series connection charcoal sand filtering pond to carry out the method of water filtration, can carry out at least one in the above-mentioned mode in a flexible way as required to can make reverse series connection charcoal sand filtering pond can handle various different quality of water, can also make reverse series connection charcoal sand filtering pond have the function of washing clean self simultaneously, and then can very big improvement reverse series connection charcoal sand filtering pond's suitability.

Preferably, the normal operation mode includes the steps of:

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

s2, closing drainage passages of the charcoal pond unit and the sand pond unit;

s3, enabling the water to be filtered to enter the carbon pool unit from the multifunctional water inlet and outlet channel unit to start filtering;

the partial override mode of operation includes the steps of:

s10, disconnecting the communication between the multifunctional water inlet and outlet channel unit and the carbon pool unit to close the carbon pool unit, or partially closing and closing the carbon pool unit;

and S20, directly feeding the water to be filtered into the sand pool unit to filter the water.

The sand basin unit backwashing mode comprises the following steps:

s100, cutting off the water inlet of the carbon tank and opening a water drainage passage of the sand tank 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 outlet channel unit;

the simultaneous but separate flushing mode of the char-bath unit and sand-bath unit comprises the steps of:

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

s32, washing the carbon pool with independent air and water; single water, flushing gas water and single water in the sand pool;

and S33, closing the water drainage channel of the carbon pool unit (2), closing the water drainage channel of the sand pool unit (3) and opening water inlet.

The positive progress effects of the invention are as follows: the multifunctional water inlet and drainage channel unit is arranged in the middle, the carbon pool unit and the sand pool unit are arranged in rows and columns, so that the space of the multifunctional water inlet and drainage channel unit can be fully utilized, various necessary facilities can be built in the space, the arrangement is more reasonable and compact, and the occupied area is smaller.

Drawings

Fig. 1 is a plan view of a reversed series connection carbon sand filter according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a water flow path diagram of the normal operation mode of the reverse series connection carbon sand filter tank according to the preferred embodiment of the invention.

FIG. 4 is a water flow path diagram of a reverse serial connection charcoal sand filter part exceeding an operation mode according to a preferred embodiment of the invention.

FIG. 5 is a water flow path diagram of a backwashing mode of the sand pool units of the reverse serial carbon sand filter according to the preferred embodiment of the invention.

FIG. 6 is a water flow path diagram of a carbon pond unit and a sand pond unit of a reverse serial carbon-sand filter in a simultaneous but separate flushing mode according to a preferred embodiment of the invention.

Description of reference numerals:

multifunctional water inlet and drainage channel unit 1

Main water intake channel 101

Inlet valve 102

Water inlet weir 103

Vertical water inlet channel 104

Carbon pool water outlet and drainage channel 105

Carbon tank drain valve 106

Carbon tank drain 107

Carbon tank outlet pipe 108

Inlet and outlet collection channel 109

Sand pit drain pipe 110

Sand pool drain valve 111

Sand pit drainage main canal 112

Carbon tank drainage main channel 113

Carbon tank water level reducing valve 114

Sand pool surmounts inlet channel 115

Sand pit overrunning water inlet valve 116

Sand pool surpasses water inlet weir 117

Sand pit surpasses water inlet guide pipe 118

Carbon cell unit 2

Carbon tank inlet channel 201

Carbon tank water and gas distribution system 202

Carbon bed 203

Sump 204

Carbon pool water through hole 205

Sand pit unit 3

Sand pool drainage channel 301

Sand bed 302

Sand pool water distribution and gas distribution system 303

The sand pond is provided with a water inlet and outlet channel 304.

Sand pool water through hole 305

Water outlet unit 4

Sand pool outlet valve 401

Detailed Description

The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.

As shown in fig. 1-6, the present embodiment provides a reverse series connection charcoal sand filter, including charcoal pond unit 2, sand pond unit 3 and water outlet unit 4, reverse series connection charcoal sand filter still includes multi-functional water inlet and outlet channel unit 1, multi-functional water inlet and outlet channel unit 1 sets up between charcoal pond unit 2 and sand pond unit 3, multi-functional water inlet and outlet channel unit 1 communicates charcoal pond unit 2 and sand pond unit 3, wherein, multi-functional water inlet and outlet channel unit 1 includes intake main channel 101 and sand pond intake and outlet water collection channel 109. The main water inlet channel 101 can be communicated with the bottom of the carbon pool unit 2, and the main water inlet channel 101 is used for supplying water to the bottom of the carbon pool unit 2. The sand pond intake and drainage collecting channel 109 is arranged at the lower end of the main intake channel 101, and the sand pond intake and drainage collecting channel 109 is communicated with the carbon pond unit 2 and the sand pond unit 3.

The main canal 101 of intaking is used for supplying water to the bottom of charcoal pond unit 2, it collects canal 109 to be equipped with the sand pond drainage of intaking at the lower extreme of main canal 101 of intaking, reverse series connection charcoal sand filtering pond is configured as the outflow of the main canal 101 of intaking from multi-functional drainage canal unit 1 to wait to filter water, charcoal pond unit 2 flows through from bottom to top, and the sand pond drainage of intaking that flows back in multi-functional drainage canal unit 1 collects canal 109, then wait to filter water again and collect canal 109 by the sand pond drainage of intaking and set out, then from top to bottom flow through sand pond unit 3, finally discharge outside reverse series connection charcoal sand filtering pond through water unit 4.

In this embodiment, the arrangement about multi-functional water inlet and drainage canal unit 1 is in the middle of, charcoal pond unit 2, and sand pond unit 3 divides row, can make full use of multi-functional water inlet and drainage canal unit 1's space, can build various necessary facilities in this space to make arrange more rationally compacter, the occupation of land can be littleer. And the arrangement of water outlet at the upper part of the water inlet at the bottom of the carbon pool unit 2 and the arrangement of water outlet at the upper part of the water outlet pipe can also reduce the carbon leakage of the carbon pool into the sand pool.

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

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

Carbon pond play water drainage canal 105 locates carbon pond unit 2 and is close to the lateral wall of multi-functional water drainage canal unit 1 of intaking, and the first half of lateral wall is equipped with carbon pond and crosses water hole 205, and carbon pond crosses water hole 205 intercommunication carbon pond play water drainage canal 105 and carbon pond unit 2, and carbon pond play water drainage canal 105 is linked together with carbon pond drain pipe 107.

The carbon pool water outlet pipe 108 is communicated with the carbon pool water outlet and drainage channel 105 and the water inlet and drainage collecting channel 109.

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

In this embodiment, the arrangement of the water discharged from the bottom of the carbon tank water discharge channel 105 and the water discharged from the upper part thereof can further ensure that the opening or closing of the carbon tank water discharge valve 106 can control the water discharge of the carbon tank or the water discharged from the carbon tank to enter the sand tank, so that the carbon tank can be used as a "one valve for two purposes", and the "carbon running" can be sunk and discharged in the channel to avoid entering the sand tank.

In other embodiments, the multi-functional inlet drain unit 1 may further include: a sand pond drain main channel 112 and a charcoal pond drain main channel 113. The sand basin main drain channel 112 is disposed at the lower end of the sand basin inlet and outlet water collecting channel 109 and is communicated with the sand basin inlet and outlet water collecting channel 109 to form a back flush flow path of the sand basin unit 3. The main carbon tank drainage channel 113 is arranged at the lower end of the main sand tank drainage channel 112, and the main carbon tank drainage channel 113 and the carbon tank unit 2 can be communicated to form a flushing flow path of the carbon tank unit 2.

In the present embodiment, the multifunctional water inlet and outlet channel unit 1 is provided with a back flush flow path of the sand pool unit 3, which comprises a sand pool water inlet and outlet collecting channel 109 and a sand pool water outlet main channel 112 which is communicated with the sand pool water inlet and outlet collecting channel 109 and is arranged at the lower end of the sand pool water inlet and outlet collecting channel; and a carbon pool unit 2 flushing flow path which is composed of a carbon pool water outlet and drainage channel 105 and a carbon pool water outlet and drainage channel 113 which can be communicated with the lower end of the sand pool water outlet and drainage channel, so that the functions of the multifunctional water inlet and drainage channel unit 1 can be further perfected.

The sand pit drain 110 communicates with the influent and effluent collection channel 109 and the sand pit drain header channel 112. The sand pond drain valve 111 is provided in the sand pond drain pipe 110. Wherein the sand pit drain 110 and the sand pit drain valve 111 constitute a sand pit drain passage.

The carbon tank drain pipe 107 is communicated with the carbon tank drain main channel 113 and the bottom of the carbon tank unit 2 water outlet drain channel 105. The carbon tank drain valve 106 is provided in the carbon tank drain pipe 107. Wherein the charcoal cell drain valve 106 and the charcoal cell drain pipe 107 constitute a charcoal cell drain passage.

In this embodiment, the opening or closing of the carbon tank drain valve 106 can control the drainage of the carbon tank unit 2 or the water discharged from the carbon tank unit 2 to enter the sand tank unit 3, and the "one-valve dual-purpose" can realize the flexible control of the operating mode of the carbon tank unit 2. The sand pool water inlet and outlet collecting channel 109 plays roles of communication, switching and water outlet main channel of sand pool water inlet and water outlet, and can not be poured back to the carbon pool, the sand pool water outlet valve 111 also plays a role of 'one valve dual-purpose', and the opening or closing of the sand pool water outlet valve 111 can control the sand pool water inlet or water outlet.

The carbon cell unit 2 includes: 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 arranged on the outer side wall at a position higher than the carbon bed 203, and a liquid level reducing valve 114 is arranged 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 is communicated with the position of the carbon pool water through 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 and drainage channel 105.

In the present embodiment, the carbon pool unit 2 adopts the above structure, which can ensure that the water to be filtered can flow from bottom to top in the carbon pool unit 2, that is, as shown in fig. 3, the reverse series connection carbon sand filter is configured to flow through the carbon pool water inlet channel 201, the carbon pool water and air distribution system 202, the carbon bed 203, and the carbon pool water collecting tank 204 in sequence inside the carbon pool unit, flow into the carbon pool water outlet and drainage channel 105 through the carbon pool water through hole 205, and finally flow back into the water inlet and drainage collecting channel 109.

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

The sand pond drainage tank 301 is arranged at the upper end of the sand bed 302; the sand pool water passing holes are communicated with the sand pool water inlet and outlet collecting channel 109 and the sand pool water draining groove 301.

The sand pool water inlet and outlet channel is arranged under the sand pool bottom plate and is communicated with the water outlet unit 4.

The sand pool water and air distribution system 303 is arranged on the bottom plate of the sand pool and below the sand bed, and is communicated with the sand pool water inlet and outlet channel.

In the present embodiment, as shown in fig. 3, the carbon sand filter tank connected in series in reverse is configured such that the water to be filtered flows from the inlet and outlet water collecting channel 109 to the sand tank unit 3 through the sand tank water passing hole 305 from top to bottom in sequence through the sand tank water draining groove 301, the sand bed 302, the sand tank water and air distributing system 303, and the sand tank inlet and outlet water channel 304. And finally discharged out of the reverse serial carbon sand filter tank through the water outlet unit 4.

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

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

In this embodiment, if because of seasonal reason, treat that the quality of water of straining water does not need or when unsuitable carries out advanced treatment, can surmount into the water unit through the sand pond and surmount the charcoal pond, directly get into sand pond unit 3 and filter, and set up more easily and surmount the charcoal pond function, set up the super sand pond on the 3 tops of sand pond unit and surmount into ditch 115, utilize the space, not area.

The embodiment also provides a water filtering method, which uses the above-mentioned inverse series carbon sand filter, and the water filtering method includes executing at least one of the following modes:

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

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

The water flow path is as shown in the sand basin unit backwashing mode with the two-dot chain line with the arrow in fig. 5, and in the sand basin unit 3 backwashing mode, the water in the sand basin unit 3 flows through the sand basin unit 3 from bottom to top and flows into the multifunctional water inlet and outlet channel unit 1.

And a simultaneous but separate flushing mode of the water flow paths as the char and sand basin units as shown by the 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 tank can flexibly execute at least one of the modes as required, so that the reverse series connection carbon sand filter tank can treat various different water qualities, and meanwhile, the reverse series connection carbon sand filter tank can have the function of washing and cleaning the reverse series connection carbon sand filter tank, and the applicability of the reverse series connection carbon sand filter tank can be greatly improved.

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

s1, the multifunctional water inlet and outlet channel unit 1, the charcoal pool unit 2 and the sand pool unit 3 are communicated, and the water outlet unit 4 is opened.

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

specifically, S1 and S2 are the steps of opening the door of the single-lattice water inlet valve 102, closing the door of the carbon pool water discharge valve 106, closing the door of the sand pool water discharge valve 111, closing the door of the carbon pool water level reducing valve 114 and opening the door of the sand pool water outlet valve 401.

S3, the water to be filtered is made to enter the carbon pool unit 2 from the middle water inlet main channel 101 to start filtering.

Specifically, in step S3, the water to be treated enters the single-cell inlet valve 102, the inlet weir 103, the inlet vertical channel, the water enters the inlet channel 201 of the charcoal pond from the middle inlet main channel 101, the water enters the outlet channel 105 of the charcoal pond from the water inlet vertical channel, the water passes through the water distribution and air distribution system from the bottom to the right, enters the water collection tank 204 after being treated by the charcoal bed 203, enters the inlet and outlet channels 109 of the sand pond from the water outlet pipe, turns over the water through the outlet channel 301 of the sand pond, is filtered by the sand bed 302 from the water outlet hole, enters the inlet and outlet channels of the sand pond from the water distribution and air distribution system from the bottom to the outlet unit 4, and enters the outlet main channel through the sand pond water valve 401.

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

and S10, disconnecting the communication between the multifunctional water inlet and outlet channel unit 1 and the carbon pool unit 2 to close the carbon pool unit 2, or partially closing and closing the carbon pool unit 2.

Specifically, in step S10, the single-lattice sand pool is opened to pass over the water inlet valve 116, and the water to be filtered enters the sand pool to be directly filtered out; the water inlet valve 102 can be opened at a small angle, and the sand pool can be opened at a small angle to filter the mixed water passing through the water inlet valve 116,

and S20, directly feeding the water to be filtered into the sand pool unit 3 to filter the water.

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

s100, cutting off water inlet and opening a water 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 outlet channel unit 1.

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

As shown in fig. 6, the simultaneous but separate flushing mode of the char cell unit 2 and sand cell unit 3 comprises the following steps:

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

specifically, in step S31, the single-cell water inlet valve 102 is closed, the sand basin water outlet valve 401 is closed, the carbon basin water discharge valve 106 at the bottom of the carbon basin water outlet and water discharge channel 105 is opened to drain the water outlet and water discharge channel, the carbon basin water level lowering valve 114 is opened to lower the water level of the carbon basin, and the water discharge valve 111 at the bottom of the sand basin water inlet and water discharge collecting channel 109 is opened to lower the water level of the collecting channel.

S32, fully opening the water inlet valve 102, and flushing with single water; synchronously flushing the sand pool;

and S33, closing the drainage passage of the carbon pool unit 2 and increasing the water level of the carbon pool unit 2.

Specifically, in step S33, the carbon tank drain valve 106 is closed, the water level in the carbon tank water outlet drain channel 105 rises to the upper carbon tank water outlet pipe 108, water outlet is resumed, and the opening degree of each water inlet valve 102 is adjusted to resume normal.

The carbon tank is flushed, and the sand tank is opened for air flushing for a plurality of times;

s33.1, opening a water flushing valve to flush with small water amount of air and water; the drained water passes through the sand basin drainage channel 301, the water inlet and drainage collecting channel 109, the sand basin drainage pipe 110 and the sand basin drainage valve 111, and is drained to the sand basin drainage main channel 112 at the lower layer of the water inlet and drainage collecting channel 109.

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

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

recovering normal operation step

And S34, the effluent of the carbon pool enters a sand pool, and the carbon sand filter returns to 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 that 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 spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (10)

1. A reverse series connection carbon sand filter comprises a carbon filter unit (2), a sand filter unit (3) and a water outlet unit (4), it is characterized in that the reverse serial connection carbon sand filter also comprises a multifunctional water inlet and drainage channel unit (1), the multifunctional water inlet and drainage channel unit (1) is arranged between the carbon pool unit (2) and the sand pool unit (3), the multifunctional water inlet and outlet channel unit (1) is communicated with the carbon pool unit (2) and the sand pool unit (3), the carbon sand filter tank connected in series in the reverse direction is configured to allow water to be filtered to flow out of the multifunctional water inlet and outlet channel unit (1), flow through the carbon tank unit (2) from bottom to top and flow back to the multifunctional water inlet and outlet channel unit (1), then flows through the sand pool unit (3) from top to bottom, and is finally discharged out of the reverse series connection carbon sand filter through the water outlet unit (4).

2. A reverse series connection charcoal sand filter tank as claimed in claim 1, wherein the multifunctional water inlet and outlet channel unit (1) comprises:

the main water inlet channel (101) is communicated with the bottom of the carbon pool unit (2), and the main water inlet channel (101) is used for supplying water to the bottom of the carbon pool unit (2);

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

and/or the presence of a gas in the gas,

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 backwashing flow path;

the main canal of carbon pond drainage (113), main canal of carbon pond drainage (113) are located the lower extreme of the main canal of sand pond drainage (112), the main canal of carbon pond drainage (113) with carbon pond unit (2) can communicate the setting in order to constitute the carbon pond unit and wash the flow path.

3. A filter bed of carbon sand in series reverse direction according to claim 2, wherein the multi-functional water inlet and outlet channel unit (1) further comprises:

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

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

the water inlet weir (103) is positioned in the vertical water inlet channel (104), arranged on one side of the water inlet valve (102) close to the direction of the carbon pond unit (2) and spaced from the water inlet valve (102);

the carbon pond water inlet channel is characterized in that 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 carbon pond water inlet passage.

4. The carbon sand filter tank connected in series in reverse direction as set forth in claim 3, wherein said multi-functional water inlet and outlet channel unit (1) further comprises:

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

the carbon pool water outlet pipe (108), the carbon pool water outlet pipe (108) is communicated with the carbon pool water outlet and drainage channel (105) and the water inlet and drainage collecting channel (109);

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

the sand pool drain pipe (110), the sand pool drain pipe (110) is communicated with the water inlet and drainage collecting channel (109) and the sand pool drainage main channel (112);

the sand pool drain valve (111), 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) form a sand pool drain passage.

5. A carbon sand filter connected in series in reverse direction according to claim 4, wherein the carbon filter unit (2) comprises:

the outer side wall of the carbon bed (203) is provided with a through hole higher than the carbon bed (203), and the through hole is provided with a liquid level reducing valve (114);

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

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

carbon pond water catch bowl (204), carbon pond water catch bowl (204) with the position of carbon pond water hole (205) corresponds and communicates, carbon pond water catch bowl (204) height is higher than carbon pond play water drainage canal (105) upper portion.

6. A carbon sand filter in reverse series connection according to claim 1, wherein the sand filter unit (3) comprises:

a sand bed (302);

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

the sand pool water passing holes (305) are communicated with the sand pool water inlet and outlet collecting channel (109) and the sand pool water draining groove (301);

the sand pool water inlet and outlet channel (304) is arranged below the bottom plate of the sand pool (2) and communicated with the water outlet unit (4);

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

7. A carbon sand filter in reverse series connection according to claim 6, wherein the sand tank unit (3) further comprises a sand tank overtaking water inlet unit, and the overtaking water inlet unit comprises:

the sand pool surpasses the water inlet channel (115);

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

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

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

8. A water filtration method using the carbon sand filter chamber of any one of claims 1 to 7, comprising performing at least one of the following modes:

in the normal operation mode, to-be-filtered water flows out of the multifunctional water inlet and outlet channel unit (1), flows through the carbon pool unit (2) from bottom to top, flows back to the multifunctional water inlet and outlet channel unit (1), then flows through the sand pool unit (3) from top to bottom, and is finally discharged out of the reversely-connected carbon sand filter tank through the water outlet unit (4);

a partial overrunning operation mode, wherein in the partial overrunning operation mode, water to be filtered directly enters the sand pool unit for filtering, or a part of water to be filtered enters the carbon pool unit for filtering;

a sand pool unit backwashing mode, wherein in the sand pool unit backwashing mode, 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 outlet channel unit (1);

and a simultaneous but separate flushing mode of the char cell unit and the sand cell unit.

9. The water filtration method as recited in claim 8, wherein the normal operation mode comprises the steps of:

s1, communicating the multifunctional water inlet and outlet channel unit (1), the charcoal pond unit (2) and the sand pond unit (3), and opening the water outlet unit (4);

s2, closing the drainage passages of the charcoal pool unit (2) and the sand pool unit (3);

s3, enabling the water to be filtered to enter the carbon pool unit (2) from the multifunctional water inlet and outlet channel unit (1) to start filtering;

the partial override mode of operation includes the steps of:

s10, disconnecting the communication between the multifunctional water inlet and drain channel unit (1) and the carbon pool unit (2) to close the carbon pool unit (2), or partially closing and closing the carbon pool unit (2);

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

10. The water filtration method of claim 8, wherein the sand basin unit backwash mode comprises the steps of:

s100, water inlet is cut off, and a water drainage passage of the sand pool unit (3) is opened;

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 outlet channel unit (1);

the simultaneous but separate flushing mode of the char-bath unit and sand-bath unit comprises the steps of:

s31, cutting off water inlet, opening a water discharging passage of the carbon pool unit (2), and opening a water discharging passage of the sand pool unit (3);

s32, washing the carbon pool with independent air and water; single water, flushing gas water and single water in the sand pool;

and S33, closing the water drainage channel of the carbon pool unit (2), closing the water drainage channel of the sand pool unit (3) and opening water inlet.

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