CN100438945C - Press filter type water purification method and device thereof - Google Patents

Abstract

The invention provides a filter press type water purification method and a device thereof, which belong to the technical field of water treatment. The pressure filter type water purification method includes several steps of water intake, filtration, water discharge, cleaning and sludge discharge. The device adopting the above-mentioned filter press type water purification method includes a housing, on which the water inlet pipe is connected, and inside the housing is a water inlet cavity, and one or more cylindrical filter cores are arranged in the water inlet cavity to filter The center of the core is the filter chamber, and each filter core is connected with a water outlet pipe. The inner end of the water outlet pipe communicates with the filter chamber, and the outer end passes through the shell to connect to the water outlet pipeline. device. The advantage of the present invention is that the water purification method breaks through the traditional purification process of mixing, reaction, and precipitation, adopts the method of filtration, and combines the cleaning device, which has a better water purification effect; no need to add drugs in the water purification process, greatly reducing The production cost is reduced; at the same time, the water quality is stable and reliable, ensuring its safe water supply and high-quality water supply.

Description

Press filter type water purification method and device thereof

technical field

The invention belongs to the technical field of water treatment, and in particular relates to a method used in water purification processes such as water supply, drainage, seawater desalination pretreatment, tap water depth purification and the like. At the same time, the present invention also relates to a device for purifying water by using the above method.

Background technique

In traditional water treatment projects or water purification processes, the process of mixing, reaction, precipitation (solid-liquid separation), and filtration is generally adopted. In the traditional process, drugs such as flocculants and disinfectants need to be added, and the production cost is high during operation; at the same time, the existing process is usually implemented in civil structures, so a large amount of construction investment is required; and the process takes a long time , the intercepted impurities need to be manually discharged, it is difficult to achieve continuous water supply, and the water production is not high.

For this reason, people design various water purification devices to replace civil structures. Such as the "integrated pressure type automatic water purifier" provided by Chinese patent 00220596.3. It comprises a water purifier barrel, inside the water purifier barrel there are two sedimentation areas and a filter area distributed left and right, and the upper part of the sedimentation area and the filter area communicates. A water inlet pipe is provided in the middle of the sedimentation area, and a sewage discharge pipe is provided at the bottom; a multi-layer filtering structure is provided in the filtration area, and a water outlet pipe is provided at the bottom. The source water enters the sedimentation area and the filtration area sequentially from the water inlet pipe. Impurities in the water in the filter area are intercepted, and the purified water is discharged from the outlet pipe. When it is necessary to remove the impurities accumulated in the filter area, change the direction of the water inlet, enter the water from the outlet hole, backwash the impurities into the sedimentation area, and discharge them to the outside through the sewage pipe at the bottom of the sedimentation area. This water purifier occupies a small area, is low in cost, and has better water quality after treatment. However, it cannot continuously supply water when removing impurities, and there are too many filter layers and the structure is too complicated.

Contents of the invention

The object of the present invention is to solve the above problems in the existing water purification methods, and provide a filter press type water purification method, which has the characteristics of low production cost, stable water quality and high efficiency.

Another object of the present invention is to provide a device for water purification treatment using the above method, so that the device has a reasonable structure, long service life and high working efficiency.

The filter press type water purification method of the present invention comprises the following steps:

1. Water inlet: press the source water into the water inlet cavity by pressure or gravity;

2. Filtration: Use pressure or gravity to make the source water in the water inlet chamber enter the filter chamber through the filter element;

3. Water outlet: the permeate in the filter chamber is drawn out through the outlet pipe and used as purified water;

4. Cleaning: The solid particles or impurities that have not passed through the filter membrane are cleaned by the cleaning device, fall into the solid-liquid separation and clarification area, and perform solid-liquid separation;

5. The sludge after solid-liquid separation in the previous step is deposited in the sludge area and discharged through the sewage pipe.

In the above filter press water purification method, there are one or more filter cores in the water inlet chamber, the filter cores are in the shape of a cylinder, and the center of the filter core is the filter cavity.

In order to achieve another object of the present invention, the device adopting the above-mentioned filter press type water purification method includes a housing, and a water inlet pipe is connected to the housing. One or more cylindrical filter cores are arranged in the water cavity, the center of the filter core is the filter cavity, each filter core is connected with a water outlet pipe, the inner end of the water outlet pipe communicates with the filter chamber, and the outer end passes through the shell The body is connected to the water outlet pipeline, and a cleaning device is provided on the outer surface of the filter element; the water inlet pipe is connected to the upper part of the shell and communicates with the water inlet chamber.

In the above-mentioned water purification device, the cleaning device includes a motor, a transmission shaft, a sealing member, a bracket and a scraper, the bracket is connected to the motor through the transmission shaft, the sealing member is arranged between the transmission shaft and the housing, and the bracket is located between the filter The outer side of the core is fixedly connected with a scraper on the bracket, and the scraper can be in contact with the outer surface of the filter core.

In the above-mentioned water purification device, the lower part of the shell is conical, and its interior is respectively a solid-liquid separation clarification area and a sludge area from top to bottom, and a sewage outlet is provided at the bottom of the shell. The dirt and sludge cleaned by the cleaning device is deposited in the sludge area after solid-liquid separation and clarification in the solid-liquid separation and clarification area, and finally discharged from the sewage outlet.

In the above water purification device, a valve is provided on the sewage outlet. The valve is used to control the opening and closing of the sewage outlet.

In the above water purification device, the filter core is a ceramic core or a composite filter core. Composite filter element is usually composed of two or more materials to improve its filtering effect.

In the water purifying device, the water flow enters the water inlet cavity in the casing through the water inlet pipe. After filtering through the filter element, it enters the filter cavity; finally, the filtered clean water flows out through the outlet pipe connected with the filter cavity.

During the normal filtration process of the filter press type water purification device, the valve on the sewage outlet is closed. The water flow will not flow out from the sewage outlet.

When it is necessary to clean the sewage of the filter press type water purification device, the motor is turned on to make the cleaning device operate, and the scraper is used to rotate on the outer wall of the filter core to remove the dirt attached to the surface of the filter core. At the same time, open the valve so that the dirt and silt accumulated in the silt area will be discharged through the sewage outlet. After cleaning, close the valve on the motor and the sewage outlet, and the water purification function can be resumed.

Compared with the prior art, the present invention has the advantages of:

1. This water purification method breaks through the traditional mixing, reaction, and precipitation purification process, and adopts the filtration method, combined with the cleaning device, to have a better water purification effect;

2. In the water purification process, there is no need to add disinfectants, flocculants and other drugs, which avoids the traditional water treatment dosing process and equipment, reduces a lot of land and construction investment, and greatly reduces production costs;

3. After adopting the water purification method and device, the water treatment capacity of the water plant is improved and the production efficiency is high; at the same time, the water quality is stable and reliable, ensuring its safe and high-quality water supply.

Description of drawings

Fig. 1 is a structural schematic diagram of the filter press type water purification device.

Fig. 2 is an outline view of the support in the filter press type water purification device.

Fig. 3 is an outline view of the scraper in the filter press type water purification device.

In the figure, 1. Shell; 11. Water inlet chamber; 12. Sewage outlet; 13. Solid-liquid separation and clarification area; 14. Silt area; 2. Water inlet pipe; 3. Filter element; 31. Filter chamber; 4. Outlet Water pipe; 5. Cleaning device; 51. Bracket; 52. Scraper; 53. Transmission shaft; 6. Motor; 7. Valve.

Detailed ways

As shown in FIG. 1 , the filter press type water purification device is composed of a housing 1 , a water inlet pipe 2 , a filter element 3 , a water outlet pipe 4 , and a cleaning device 5 .

The housing 1 is cylindrical and has a water inlet cavity 11 inside. The water inlet pipe 2 is connected to the upper part of the casing 1 and communicates with the water inlet chamber 11 . In this embodiment, the lower part of the shell 1 is conical, and its interior is divided into a solid-liquid separation and clarification zone 13 and a sludge zone 14 . The bottom of the sludge zone 14 directly communicates with the sewage outlet 12 .

In this embodiment, a valve 7 is installed at the sewage outlet 12 . The valve 7 is used to control the opening and closing of the sewage outlet 12 . Silt and dirt can be discharged outside directly through the sewage outlet 12.

As shown in FIG. 1 , in this embodiment, a filter element 3 is arranged in the middle of the water inlet cavity 11 . The filter core 3 is cylindrical, and a filter cavity 31 is formed inside it. The filter core 3 of this embodiment adopts a ceramic core. The bottom of the filter element 3 is connected with a water outlet pipe 4, the inner end of the water outlet pipe 4 communicates with the filter cavity 31, and the outer end passes through the housing 1 to connect with the water outlet pipeline.

A cleaning device 5 is installed outside the filter core 3 . This cleaning device 5 is made up of parts such as motor 6, power transmission shaft 53, sealing member (not drawn in the accompanying drawing), support 51 and scraper blade 52. As shown in FIG. 2 , the scraper 52 is installed on the bracket 51 , and the motor 6 drives the bracket 51 to rotate through the transmission shaft 53 , so that the scraper 52 rotates together. As shown in FIG. 3 , the scraper 52 is in the shape of a sheet with a slight curvature. The edge of the scraper 52 is closely attached to the outer surface of the filter core 3 . During the rotation of the scraper blade 52 , the dirt or sludge attached to the outer surface of the filter core 3 can be scraped off and fall into the solid-liquid separation and clarification zone 13 .

During the use of the device, the filter element 3 usually needs to be cleaned regularly. During cleaning, it is only necessary to turn on the motor 6 and open the valve 7, and the operation is very convenient. After cleaning, close valve 7 and motor 6.

The above-mentioned device is used for water purification treatment, and the process is as follows: firstly, the source water is drawn into the water inlet chamber 11 through a water pump, or the water source with a higher water level in the reservoir area is used to press water into the water inlet chamber 11 through a pipeline. The middle part of the water inlet chamber 11 is provided with a filter core 3 . The source water entering the water inlet chamber 11 is pressed on the filter element 3 under the action of pressure or gravity, and the water enters the filter chamber 31 after being filtered, while the dirt and silt in the source water are trapped and attached to the outer surface of the filter element 3 superior. Then, the water in the filter chamber 31 is introduced into the water outlet pipeline through the water outlet pipe 4 to be used as purified water. When the water purification device needs to be cleaned after running for a period of time, just open the cleaning device 5 to clean the dirt attached to the outer surface of the filter core 3 and get final product. Finally, the separated sludge accumulated in the sludge area 14 at the bottom of the shell 1 can be discharged through the sewage outlet 12 .

Claims (7)

1. A filter press type water purification method, comprising the following steps: (1) Water inlet: Press the source water into the water inlet cavity by pressure or gravity; (2), Filtration: Use pressure or gravity to make the source water in the water inlet chamber enter the filter chamber through the filter element; (3) Water outlet: the permeate in the filter chamber is drawn out through the outlet pipe and used as purified water; (4) Cleaning: The solid particles or impurities that have not passed through the filter membrane are cleaned with a cleaning device, fall into the solid-liquid separation and clarification area, and perform solid-liquid separation; (5) The silt after solid-liquid separation in the previous step is deposited in the silt area and discharged outward through the sewage pipe. 2. The filter press type water purification method according to claim 1, characterized in that there are one or more filter cores in the water inlet cavity, the filter cores are cylindrical, and the center of the filter core is the filter cavity. 3. A device adopting the filter press type water purification method according to claim 1 or 2, comprising a casing (1), and a water inlet pipe (2) is connected to the casing (1), characterized in that the Inside the casing (1) is a water inlet chamber (11), in which one or more cylindrical filter elements (3) are arranged, and the center of the filter element (3) is the filter chamber (31), each filter core (3) is connected with a water outlet pipe (4), the inner end of the water outlet pipe (4) communicates with the filter cavity (31), and the outer end passes through the housing (1) and is connected to the water outlet pipe In the middle of the road, a cleaning device (5) is provided on the outer surface of the filter element (3); the water inlet pipe (2) is connected to the upper part of the housing (1) and communicates with the water inlet chamber (11). 4. The device according to claim 3, characterized in that, the cleaning device (5) includes a motor (6), a transmission shaft (53), a sealing member, a bracket (51) and a scraper (52), and the bracket (51) is connected with the motor (6) through the transmission shaft (53), the sealing member is arranged between the transmission shaft (53) and the housing (1), and the support (51) is positioned at the outside of the filter core (3), on the support ( 51) is fixedly connected with scraper blade (52), and scraper blade (52) can contact with the outer surface of filter core (3). 5. The device according to claim 3, characterized in that the lower part of the housing (1) is conical, and its interior is respectively a solid-liquid separation and clarification area (13) and a sludge area (14) from top to bottom. , and a sewage outlet (12) is provided at the bottom of the housing (1). 6. The device according to claim 5, characterized in that a valve (7) is provided on the sewage outlet (12). 7. The device according to claim 3, characterized in that the filter core (3) is a ceramic core or a composite filter core.

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