WO2018103534A1

WO2018103534A1 - Horizontal-flow continuous sand filtration apparatus and water treatment process thereof

Info

Publication number: WO2018103534A1
Application number: PCT/CN2017/112509
Authority: WO
Inventors: 张建三
Original assignee: 欧盛腾水处理技术（杭州）有限公司
Priority date: 2016-12-06
Filing date: 2017-11-23
Publication date: 2018-06-14

Abstract

A horizontal-flow continuous sand filtration apparatus and a water treatment process thereof. The apparatus comprises a barrel (1), a raw water inlet assembly, a sand filtration bed (4), a sand extracting and washing assembly, and a filtered water outlet assembly; the sand filtration bed (4) is provided in the barrel (1) and consists of filtered sand; the raw water inlet assembly comprises a water inlet pipe (2) and a water distribution device (3); the sand extracting and washing assembly comprises a sand extracting pipe (5), a sand washer (6), and a drainage pipe (10); the filtered sand at the bottom of the barrel (1) is transferred to the sand washer (6) by means of the sand extracting pipe (5) to be washed, and then flows into the top of the sand filtration bed (4) by means of the sand washer (6); the drainage pipe (10) drains sewage in the sand washer (6); and the filtered water outlet assembly comprises a water collector (7) and a water outlet pipe (9).

Description

Horizontal flow continuous sand filter equipment and water treatment process thereof

This application claims priority to Chinese Patent Application No. 201611106666.0, entitled "Horizontal Flow Continuous Sand Filtration Equipment and Water Treatment Process", and December 2016, and December 2016 The priority of the Chinese Patent Application No. 201621325431.6, entitled "Horizontal Flow Continuous Sand Filtration Apparatus", is hereby incorporated by reference.

Technical field

The invention relates to a water treatment device, in particular to a horizontal flow continuous sand filter device and a water treatment process thereof.

Background technique

Sand filtration is often used for advanced treatment of feed water treatment or raw water after secondary treatment. The main function is to intercept solid particles and colloids in water to make water clear. The traditional fixed bed sand filter, the filter medium (ie sand) is fixed during the filtration process. After running for a certain period of time, the filter medium is blocked by the suspended solids, the filtration resistance of the filter bed is increased, the filtration speed of the raw water is lowered, and the water production capacity of the equipment is lowered. At this time, the filtration process has to be interrupted, and the backwashing operation is performed to realize the regeneration of the filter bed. .

Continuous sand filter equipment is a solid-liquid separation equipment for simultaneous filtration and sand washing. It can clean the filter medium without stopping the machine. It can ensure the continuous operation of the filtration operation, and has a small footprint, simple structure, convenient maintenance and work. Stable state and high level of automation management.

In the existing continuous sand filtration equipment, the water filtration process and the sand cleaning cycle process are only performed in the vertical direction, the filtration area is limited by the horizontal cross-sectional area of the equipment, the sand layer utilization is insufficient, and the overcurrent velocity is single, which is disadvantageous for different Deposition of solid suspended solids.

Summary of the invention

It is an object of the present invention to provide a horizontal flow continuous sand filter apparatus to solve the problem that the sand filter area of the existing sand filter technology is limited, the sand layer is insufficiently utilized, and the overcurrent speed is single.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A horizontal flow continuous sand filter device, the horizontal flow continuous sand filter device comprises a cylinder body, a raw water inlet component, a sand filter bed, a sand washing sand component and a filtered water outlet component,

The sand filter bed is disposed in the cylinder body, including the filter sand;

The raw water inlet component comprises an inlet pipe and a water distribution device for feeding the raw water into the sand filter bed and uniformly distributed, the inlet pipe is connected with the water distribution device, and a plurality of outlet holes are provided on the façade of the water distribution device, and the water distribution device is provided In the sand filter bed;

The sand washing and scrubbing assembly comprises a sanding pipe, a sand washing device and a sewage pipe. The sand filter at the bottom of the cylinder is transferred to the sand washing device through the sanding pipe, and after washing, the sand washing device enters the top of the sand filter bed, and the sewage pipe will be washed. The sewage in the sander is discharged;

The water outlet assembly is filtered, and includes a water collector and an outlet pipe. The water collector forms a water collection space in the cylinder body, and a side of the water collector adjacent to the sand filter bed has an inlet water passage, and the outlet pipe is connected with the water collector. The sand washer in the horizontal flow continuous sand filter device may be disposed inside the cylinder or outside the cylinder. The purpose of the water collector is to separate the filtered water filtered by the sand filter bed from the sand filter bed and store it in the water collection space. The outlet pipe discharges the filtered water filtered through the sand filter bed out of the cylinder.

Preferably, the water distribution device is disposed in the axial direction of the cylinder or distributed along the inner wall of the cylinder.

Preferably, the water collector and the water distribution device are vertically parallel to each other and separated by the sand filter bed to allow the raw water to flow horizontally within the sand filter bed.

Preferably, the barrel is made of metal, synthetic material or concrete.

Preferably, the sand washer is disposed inside or outside the cylinder;

The sanding tube is disposed inside or outside the cylinder.

Preferably, the water distribution device is surrounded by a sieve plate having a wedge-shaped wire filtering surface, or one of a perforated pipe, a slit sieve, or a combination of the above; the water collector is It is surrounded by a sieve plate having a wedge-shaped wire filtering surface, or one of a perforated pipe, a slit sieve, a microfiltration membrane, an ultrafiltration membrane, or a combination of the above.

Preferably, the water collector is provided with a water collecting pipe, and the water collecting pipe and the water outlet pipe are connected by a pipeline.

A water treatment process for a horizontal flow continuous sand filter device, the process comprising the following two processes;

(1) Filtration process: using the equipment described above, the raw water enters the horizontal flow continuous sand filter device through the inlet pipe, passes through the water distribution device and smoothly enters the sand filter bed, and horizontally filters the sand in the cylinder; during the filtration process, The working surface of the filter bed gradually changes. Finally, the filtered water is collected by the water collector and discharged through the outlet pipe;

(2) Sand washing process: water under the sand filter bed under the action of stripping, pumping or mechanical conveying The sand is raised to the sand washer by the sand pipe; in the sand pipe and the sand washer, the impurity pollutants are separated from the surface of the sand, the impurities flow out of the sewage pipe, and the filter sand is sent back to the surface of the filter bed, and the upper sand filter As the bottom sand is raised, it moves down until it rises again.

The method of the present invention can be carried out continuously by filtration and sand washing; it can also be carried out continuously by filtration, and the sand washing is carried out intermittently, for example, once every 10 minutes.

The horizontal flow continuous sand filter device of the invention has large filter area, controllable over-flow speed, maximizes the efficiency of the filter sand, has the advantages of wide applicable water quality range, high economic benefit, and the like, and requires no backwash and backwashing, and the effluent water quality is stable and operated. Simple and easy to maintain. Compared with the prior art, the beneficial effects of the present invention:

1. Increase the filtration area. In the existing fixed or continuous sand filter equipment, raw water enters the sand filter bed from the bottom water distributor, and is filtered from bottom to top, and the filtration area is only the horizontal cross-sectional area of the sand filter device. The vertical water distribution method and the raw water horizontal flow filter bed greatly increase the filtration area, which not only improves the water quality but also reduces the amount of sand filtration.

2. Control the overcurrent speed. Vertical water distribution method, when the raw water flows toward the wall of the cylinder, the radius increases, the flow area increases, the overcurrent speed decreases gradually, the contact time between the raw water and the filter sand increases, and the suspended solids of different sizes gradually deposit from the inside to the outside. To maximize the efficiency of the sand filter, with a wide range of applicable water quality and high economic benefits.

3. Continuous operation. The sand filter equipment does not need to be backwashed, the effluent water quality is stable, and the control valve can be added to control the pipeline, which is easy to operate and convenient to maintain.

DRAWINGS

1 is a schematic view showing the structure of a horizontal flow continuous sand filter device of the present invention.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;

3 is a schematic structural view of another horizontal flow continuous sand filter device of the present invention.

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 3;

In the figure: 1. cylinder, 2. inlet pipe, 3. water distribution device, 4. sand filter bed, 5. sanding pipe, 6. sand washing device, 7. water collector, 71. sieve plate, 72. Cover plate, 8. branch water collecting pipe, 9. water outlet pipe, 10. sewage pipe.

detailed description

The technical solutions of the present invention will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings. It is to be understood that the invention is not limited to the embodiments described below, and that any form of modifications and/or changes made to the invention are intended to fall within the scope of the invention.

Embodiment 1

A horizontal flow continuous sand filter device as shown in Figures 1 and 2, the device comprising a cylinder 1, a raw water inlet assembly, a sand filter bed 4, a sand washing assembly and a filtered water outlet assembly.

The upper part of the cylinder 1 is tapered, the middle part is cylindrical, and the lower part is inverted cone.

The raw water inlet assembly is composed of the inlet pipe 2 and the water distribution device 3; the inlet pipe 2 extends through the conical upper portion of the cylinder 1 into the cylinder 1 into the sand filter bed 4, and is connected to the water distribution device 3; the water distribution device 3 It is disposed in the axial direction of the cylinder 1 and is located in the sand filter bed 4. The top of the water distribution device 3 is slightly lower than the lower edge of the tapered upper portion of the cylindrical body 1, and the bottom outlet of the water distribution device 3 is in the inverted shape of the cylindrical body 1. Above the lower portion, flush with the lower edge of the cylindrical middle portion of the cylinder 1, the function of which is to feed the raw water into the sand filter bed 4 and evenly distribute; the water distribution device 3 is surrounded by a sieve plate having a wedge-shaped wire filtering surface. The original water enters the sand filter bed 4 evenly and smoothly through the sieve joint of the sieve plate. However, the water distribution structure of the water distribution device 3 of the present invention is not limited thereto, and this example is only preferable.

As shown in Fig. 1, the sand filter bed 4 is composed of sand filter. Of course, those skilled in the art can understand that the sand filter bed 4 should also include other necessary components such as fixing members and sealing members, and should not be construed as including only filtering. sand. The sand filter bed 4 is located in the cylinder 1 and extends upward from the bottom of the cylinder 1. The sand filter bed 4 has a conical top for facilitating the downflow of the sand and finally collecting at the lower end of the sanding tube 5. Sand filter bed 4 is used to filter raw water. Filter sand is the main material for raw water purification and filtration. Filter media such as quartz sand, activated carbon, anthracite, glass ball and ceramsite can be selected. Filter should be selected according to the quality of raw water and the water quality of filtered water. Sand category and particle grading. In addition, the particle size of the filter sand should be larger than the screen width of the water distribution device 3 and the water collector 7.

As shown in FIG. 1 , the sand washing and scrubbing assembly is composed of a sanding pipe 5, a sand washing device 6 and a sewage pipe 10; the sanding pipe 5 is located in the water discharging device 3 of the raw water inlet assembly, and the sanding pipe 5 The function is to lift the dirty sand at the bottom of the cylinder 1 into the sand washer 6. The upper end of the sanding tube 5 extends into the sand washer 6 disposed at the upper end of the cylinder 1, and the lower end of the sanding tube 5 is located at the bottom of the cylinder 1 and is provided with a bell mouth. The sand washer 6 is disposed at the top of the tapered upper portion of the cylinder 1. The sand washer 6 has a cylindrical structure with an upper and lower opening. The bottom of the sand washer 6 is a narrowed portion and has a plurality of blocks on the inner wall of the bottom portion thereof. Sheet, the upper end of the sanding tube 5 The outer wall is provided with a baffle that cooperates with the baffle, and the baffle and the baffle are inclined downward, and the dirty sand is circulated in the flow path formed by the baffle and the baffle. Therefore, the baffle and the baffle The function is to clean the sand extracted from the bottom of the cylinder 1 and then slowly flow from the sand washer 6 into the top of the sand filter bed 4 to control the speed to avoid damaging the structure of the sand filter bed 4.

Compared with the way of the external sanding tube 5, the sanding tube 5 is disposed in the water distribution device 3 to reduce energy consumption. The sand washer 6 is used for cleaning the dirt discharged from the sanding tube 5. After cleaning, the cleaning sand is returned to the surface of the sand filter bed 4; the side wall of the sand washer 6 is provided with a sewage connected to the outside. The pipe 10, the sewage pipe 10 discharges the pollutants on the surface of the dirty sand and a small amount of washing water into the horizontal sand filter device.

As shown in Fig. 1, the filtered water outlet assembly is composed of a sump 7, a branch header 8 and an outlet pipe 9; the sump 7 includes a sieve plate 71 having a wedge-shaped wire filtering surface and two lower and upper sieve plates. The end cover 72, the sieve plate 71 and the two cover plates 72 form a water collecting space in the cylinder 1, and the bottom of the water collector 7 is provided with a branch water collecting pipe 8 communicating with the outside of the cylindrical body 1, and the outlets of the respective branch water collecting pipes 8 The outer wall of the cylinder 1 is connected to the outlet pipe 9 through a pipe. The filtered water passing through the sand filter bed 4 enters the interior of the sump 7 through the sieve slit of the sieve plate 71. As shown in Fig. 2, the sieve plate 72 of the present embodiment is a curved piece, and the number is 8 and 8 arc pieces. Arranged evenly along the inner wall of the cylinder 1, the projection of the arc is oriented toward the axis of the cylinder 1; the outlet pipe 9 discharges the filtered water filtered through the sand filter bed 4 out of the cylinder 1.

A horizontal flow continuous sand filtration water treatment process using the horizontal flow continuous sand filtration device described above, comprising the following two processes:

(1) Filtration process: the raw water enters the horizontal flow continuous sand filter device via the inlet pipe 2, and smoothly enters the sand filter bed 4 through the sieve joint of the sieve plate in the water distribution device 3, and flows from the inside to the outside in the radial direction of the cylinder 1 Filter the sand. During the radial filtration process, the working surface of the sand filter bed 4 is gradually increased. Accordingly, the filtration rate of the raw water is gradually decreased, and the contact time between the raw water and the filter sand is increased. That is, along the radial direction of the sand filter bed 4, the inner layer has a fast flow rate, and large suspended particles or contaminants in the water are intercepted; the outer layer has a slow flow rate, which facilitates the deposition of small-sized pollutants, and the radial filtration enables the performance of the filter sand to be achieved. maximize. Finally, the filtered water is collected by the sump 7 on the inner wall of the cylinder 1, flows through the branch header 8, and is collected and discharged to the outlet pipe 9.

(2) Sand washing process: the compressed air generated by the air pump passes into the bottom end of the vertically arranged sanding pipe 5 in the cylinder body 1, and under the action of stripping, the water and the dirty sand at the bottom of the sand filter bed 4 are raised to the cylinder The sand washer 6 in the upper part of the body 1. In the sanding tube 5 and the sand washing device 6, the impurity contaminants are caused by the complex random mixing agitation of the liquid-solid two-phase flow, the collision friction between the sand particles and the shearing force of the water flow. The surface of the sand is detached, and the impurities flow out of the sewage pipe 10 due to the small density under the action of water flow and hydraulic force. The cleaned filter sand is sent back to the surface of the sand filter bed 4 due to the high density, and the upper layer of sand is gradually moved downwards as the bottom sand is raised. One upgrade.

Embodiment 2

A horizontal flow continuous sand filter device as shown in FIGS. 3 and 4 includes a cylinder 1, a raw water inlet assembly, a sand filter bed 4, a sand washing assembly, and a filtered water outlet assembly.

As shown in Fig. 3, the upper portion of the cylinder 1 is a cylindrical section, and the lower portion is an inverted cone.

The raw water inlet assembly is composed of the inlet pipe 2 and the water distribution device 3; the inlet pipe 2 extends through the inverted conical lower portion of the cylinder 1 into the cylinder 1, enters the sand filter bed 4, and is connected to the water distribution device 3; 3 is disposed in the axial direction of the cylinder 1 and located in the sand filter bed 4, the bottom end of the water distribution device 3 is above the lower portion of the inverted cone of the cylinder 1, and is flush with the lower edge of the cylindrical portion of the cylinder 1, The function is to send raw water into the sand filter bed 4 and evenly distribute; the water distribution device 3 adopts a perforated pipe, and the perforated pipe is provided with a uniformly distributed water distribution channel, and the raw water passes through the prefabricated water distribution channel and smoothly enters the sand filter bed. 4. However, the water distribution structure of the water distribution device 3 of the present invention is not limited thereto, and this example is only preferable.

As shown in FIG. 3, the sand filter bed 4 is composed of filter sand, which is located in the cylinder body 1, and extends upward from the bottom of the cylinder body 1. The sand filter bed 4 has a conical top to facilitate the downsizing of the sand, and the sand is finally collected. At the lower end of the sanding tube 5 at the nozzle. Sand filter bed 4 is used to filter raw water. Filter sand is the main material for raw water purification and filtration. Filter media such as quartz sand, activated carbon, anthracite, glass ball and ceramsite can be selected. Filter should be selected according to the quality of raw water and the water quality of filtered water. Sand category and particle grading.

As shown in FIG. 3, the sand washing and scrubbing assembly is composed of a sanding pipe 5, a sand washer 6 and a sewage pipe 10; the sanding pipe 5 is located outside the sand filter cylinder 1, and the sanding pipe 5 pours the cylinder 1 The lower cone outlet is connected to the top of the sand washer 6, which is capable of lifting the dirt from the bottom of the cylinder 1 into the sand washer 6. The sand washer 6 is disposed at the upper end of the cylinder 1 and fixed on the top of the cylinder 1. The sand washer 6 has a cylindrical structure with an upper and lower opening. The bottom of the sand washer 6 is a narrowed and the inner wall of the bottom is provided. The inner thread passage of the bottom of the sand washer 6 is slowed down, and the inner wall of the bottom of the sand washer 6 has a plurality of protrusions in the circumferential direction, and each protrusion forms the above-mentioned internal thread flow passage, so that the sand filter bypasses in the flow passage, reducing the falling speed. The sand washer 6 is used for cleaning the dirt sand lifted by the sanding tube 5. After cleaning, the cleaning sand falls back to the surface of the sand filter bed 4; the side wall of the sand washer 6 is connected to the outside of the cylinder body. The sewage pipe 10, the sewage pipe 10 discharges the pollutants on the surface of the sand and a small amount of washing water out of the horizontal flow continuous sand filter device.

Compared with the way of sanding tube 5, the sanding tube 5 is arranged outside the cylinder 1 to simplify the internal structure of the continuous sand filter equipment. When the continuous sand filter equipment has problems, it is convenient to inspect and repair, and the sanding tube 5 is not easy to block. Therefore, in a specific application, the horizontal flow continuous sand filter device of the two different structures in the present invention can be selected according to actual needs.

It should be noted that, in the first embodiment and the second embodiment, the sanding tube 5 can be disposed inside and outside the cylinder 1. Similarly, the sand washer 6 can also be disposed inside and outside the cylinder 1, and the washing is performed. When the sander 6 is located inside the cylinder 1, the arrangement is as shown in FIG. 1. When it is located outside the cylinder 1, it can be a separate component. At this time, the sand washer 6 is disposed outside the cylinder 1. The sanding tubes 5 are connected so that the dirt from the bottom of the cylinder 1 can be passed into the sand washer 6 for cleaning.

As shown in FIG. 3, the filtered water outlet assembly is composed of a sump 7, a branch header 8 and an outlet pipe 9; the sump 7 includes a cylinder having a cylinder diameter smaller than that of the cylinder 1 and uniformly distributed with a water hole. And an annular cover plate located at the upper and lower ends of the cylinder, the cylinder is fixed on the inner wall of the cylinder 1, and the filtered water passing through the sand filter bed 4 enters the sump 7 through the water distribution hole of the cylinder surface; as shown in FIG. The cylinder and the two cover plates form an annular water collecting space on the inner wall of the cylinder 1, and the bottom of the water collector 7 is provided with a branch water collecting pipe 8 communicating with the outside of the cylinder 1, and the outlet of each branch water collecting pipe 8 is on the outer wall of the cylinder 1. It is connected to the outlet pipe 9 through a pipeline. The outlet pipe 9 discharges the filtered water filtered through the sand filter bed 4 out of the cylinder 1.

It should be noted that, in the present invention, the raw water does not have to flow in the radial direction of the cylinder 1 in the sand filter bed 4, that is, in the cylinder 1, the arrangement of the water collector 7 and the water distribution device 3 is not necessarily: cloth water The apparatus is disposed at the axis of the cylinder 1, and the sump 7 is disposed at the outer periphery of the sand filter bed 4, at which time the raw water flows radially from the inside to the outside in the sand filter bed 4. Those skilled in the art can understand that the purpose of the present invention is to achieve the horizontal flow of raw water in the sand filter bed 4, and therefore, the arrangement of the water collector 7 and the water distribution device 3 only needs to be parallel to each other in the vertical direction. At this time, in each horizontal section of the cylinder 1, the distance between the sump 7 and the water distribution device 3 is the same, the resistance of the raw water flowing along the horizontal section is the smallest, and the raw water has a tendency to flow along the path with the least resistance. Thereby, it is possible to ensure that the raw water flows horizontally in the sand filter bed 4.

Further, the cross section of the cylindrical body 1 in the present invention is not limited to the circular shape in the embodiment shown in Figs. 1 and 3, and may be a hollow rectangular parallelepiped or a hollow rectangular parallelepiped structure. When the cylinder 1 has a hollow rectangular parallelepiped structure, similar to FIG. 1 and FIG. 3, the sand filter bed 4 is also rectangular in cross section, and the water distribution device 3 can be disposed at the axis of the hollow rectangular parallelepiped structure, and accordingly, the water collector 7 is disposed. On the outer wall of the filter bed 4, At this time, the filtered water diffuses radially outward in the sand filter bed 4. When the cylinder 1 has a hollow rectangular parallelepiped structure, the water distribution device 3 and the water collector 7 are respectively disposed on two side walls parallel to each other inside the cylinder body 1. For example, the water distribution device 3 is disposed on the front side wall, and the water collector 7 is disposed. At the rear side wall, at this time, the filtered water flows straight in the section of the sand filter bed 4.

In addition, the material of the cylinder 1 may be metal, synthetic material, concrete, or the like.

The invention provides a horizontal flow continuous sand filtering water treatment process, which adopts the horizontal flow continuous sand filtering device shown in FIG. 3 and FIG. 4, and includes the following two processes:

(1) Filtration process: the raw water enters the horizontal flow continuous sand filter device through the inlet pipe 2, and uniformly enters the sand filter bed 4 through the water distribution channel of the water distribution device 3, and flows the filter sand in the horizontal direction in the cylinder body 1.

Specifically, as described above, in the cylinder 1, the raw water can flow straight along any horizontal level in the sand filter bed 4, and in the filtration process, the working surface of the sand filter bed 4 is gradually increased in the vertical direction, and accordingly, the raw water The filtration rate is gradually reduced, and the contact time between the raw water and the filter sand is increased. That is, along the horizontal direction of the sand filter bed 4, the flow rate of the raw water near the water distribution device 3 is fast, and large-sized suspended particles or contaminants in the water are intercepted; the flow rate of the raw water near the water collector 7 is slow, which is favorable for small-sized pollutants. The deposition, horizontal linear filtration maximizes the effectiveness of the sand filter. Finally, the filtered water is collected by the sump 7 uniformly distributed on the inner wall of the cylinder 1, flows through the branch water collecting pipe 8, and is collected and discharged to the outlet pipe 9.

(2) Sand washing process: the compressed air generated by the air pump passes into the bottom end of the outer sanding pipe 5 of the cylinder body 1, and under the action of gas stripping, the water and the dirty sand at the bottom of the sand filter bed 4 are raised to the upper part of the cylinder body 1. Washer 6 in the sand. In the sanding tube 5 and the sand washing device 6, the impurity contaminants are separated from the surface of the sand, the impurities flow out of the sewage pipe 10, and the cleaned sand is sent back to the surface of the sand filter bed 4, and the upper layer of sand is gradually increased with the bottom sand. Move down until you lift again.

The above-mentioned embodiments are only a preferred embodiment of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

A horizontal flow continuous sand filter device, characterized in that: the horizontal flow continuous sand filter device comprises a cylinder body, a raw water inlet component, a sand filter bed, a sand washing sand component and a filtered water outlet component,

The sand filter bed is disposed in the cylinder body, including the filter sand;

The raw water inlet component comprises an inlet pipe and a water distribution device for feeding the raw water into the sand filter bed and uniformly distributed, the inlet pipe is connected with the water distribution device, and a plurality of outlet holes are provided on the façade of the water distribution device, and the water distribution device is provided In the sand filter bed;

The sand washing and scrubbing assembly comprises a sanding pipe, a sand washing device and a sewage pipe. The sand filter at the bottom of the cylinder is transferred to the sand washing device through the sanding pipe, and after washing, the sand washing device enters the top of the sand filter bed, and the sewage pipe will be washed. The sewage in the sander is discharged;

The water outlet assembly is filtered, and includes a water collector and an outlet pipe. The water collector forms a water collection space in the cylinder body, and a side of the water collector adjacent to the sand filter bed has an inlet water passage, and the outlet pipe is connected with the water collector.
A horizontal flow continuous sand filter apparatus according to claim 1, wherein said water distribution means is disposed in the axial direction of the cylinder or distributed along the inner wall of the cylinder.
The horizontal flow continuous sand filter apparatus according to claim 1, wherein the water collector and the water distribution device are vertically parallel to each other and separated by the sand filter bed therebetween, Raw water is allowed to flow horizontally within the sand filter bed.
The horizontal flow continuous sand filter apparatus according to claim 1, wherein the cylinder is made of metal, synthetic material or concrete.
The horizontal flow continuous sand filter device according to claim 1, wherein the sand washer is disposed inside or outside the cylinder;

The sanding tube is disposed inside or outside the cylinder.
The horizontal flow continuous sand filtering device according to any one of claims 1 to 5, wherein the water distribution device is surrounded by a sieve plate having a wedge-shaped wire filtering surface, or a perforated pipe or a strip One of the sifting screens, or a combination of the above; the sump is surrounded by a sieve plate having a wedge-shaped wire filtering surface, or a perforated pipe, a slit sieve, a microfiltration membrane, or an ultrafiltration One of the membranes, or a combination of the above.
The horizontal flow continuous sand filter device according to any one of claims 1 to 5, wherein the water collector is provided with a water collecting pipe, and the water collecting pipe and the water outlet pipe are connected by a pipeline.
A water treatment process for a horizontal flow continuous sand filter device, characterized in that the process comprises the following two processes;

(1) Filtration process: using the apparatus according to claim 1, the raw water enters the horizontal flow continuous sand filter device through the inlet pipe, uniformly and gently enters the sand filter bed through the water distribution device, and horizontally filters the sand in the cylinder; the filtration process In the middle, the working surface of the filter bed gradually changes. Finally, the filtered water is collected by the water collector and discharged through the outlet pipe;

(2) Sand washing process: under the action of stripping, pumping or mechanical conveying, the water and sewage sand at the bottom of the sand filter bed are raised to the sand washer through the sanding pipe; in the sanding pipe and the sand washing device, The impurity contaminants are detached from the surface of the sand, the impurities flow out of the sewage pipe, and the cleaned filter sand is sent back to the surface of the filter bed, and the upper layer of sand is gradually moved downwards until it is lifted again as the bottom sand is lifted.