CN104801085A - Filter device - Google Patents

Abstract

The invention discloses a filter device, which mainly includes an air bag, an air guide tube, a gas valve, an inlet valve, an inlet pipe, a front shell, a rear shell, a filter plate, a connecting plate, a drain pipe, a drain valve, a gasket, an outlet valve and The outlet pipe, in which the air bag is connected to the air guide pipe, the inlet pipe and the air guide pipe are located above the front shell, the drain pipe is located on the lower side of the front shell, and the filter plate and gasket are combined and installed on the front shell and the rear shell at an angle of 45° Between the body, the front shell and the rear shell are connected by connecting plate bolts, the outlet pipe is located at the bottom of the rear shell; the airbag is connected to the air guide pipe, and the inlet pipe and the air guide pipe are located above the front shell, forming an airbag backwash structure . The invention combines the backwashing structure of the airbag and the structure of the filter plate with angles, and realizes the multi-directional flushing function of the filter plate by controlling the switch of each valve, and at the same time prevents particles from penetrating the medium under a large impact force, and provides a good filtering effect, which is a good solution for industrial production. Purification needs to provide protection.

Description

a filter device

technical field

The invention relates to a filtering device, which belongs to the field of separation.

Background technique

In industrial production, the treatment of sewage, the recovery of chemical reagents and the purification of liquids all require filtration operations. Filtration is the process in which the liquid in the suspension passes through the medium under the action of driving force or other external forces, and solid particles and other substances are retained by the filter medium, thereby separating solids and other liquids.

There are various filtering devices at present, but the filtering interface of most filtering devices is perpendicular to the pipeline. This structure is convenient for production, but when the suspension passes through the medium, it will impact the filter interface vertically. In this case, the impact force is large, which will not only damage the surface of the filter medium, but also some smaller particles will pass through under the impact force. Media, reduce the service life of the filter media, thereby reducing the filtration efficiency. In addition, the traditional filtering device only relies on the impact force of the pumped water for backwashing. This method has the defect of incomplete cleaning, and long-term flushing will cause waste of water resources.

Aiming at the defects of the traditional filter equipment, the present invention introduces the air bag backwash structure by changing the angle between the filter interface and the pipeline, which provides the possibility of improving the filtration efficiency, prolonging the service life of the equipment and thoroughly cleaning the filter equipment.

Contents of the invention

The invention proposes a filter device, aiming to solve the defect of incomplete cleaning of the filter medium in the traditional filter device, improve the filter efficiency at the same time, and more effectively block particles from penetrating the interface. The structure with a certain angle between the filter interface and the pipeline and the airbag backwash structure not only slow down the impact of the fluid, but also strengthen the cleaning ability of the filter medium, thereby prolonging the maintenance interval of equipment and improving industrial production efficiency.

The invention discloses a filter device, which belongs to the field of separation, and mainly includes an air bag, an air guide tube, a gas valve, an inlet valve, an inlet pipe, a front shell, a rear shell, a filter plate, a connecting plate, a drain pipe, a drain valve, and a washer , the outlet valve and the outlet pipe, in which the air bag is connected to the air guide pipe, the inlet pipe and the air guide pipe are located above the front shell, the drain pipe is located on the lower side of the front shell, and the filter plate and gasket are combined and installed on the front shell at an angle of 45° Between the body and the rear shell, the front shell and the rear shell are connected by connecting plate bolts, and the outlet pipe is located at the bottom of the rear shell.

The invention proposes a filter device, wherein the filter plate and gasket are combined and installed between the front shell and the rear shell at an inclination angle of 45°, and under the impact of the vertically downward liquid, the impact force of the liquid is dispersed into a vertical The shunt between the filter plate and parallel to the filter plate reduces the impact of water flow and prevents particles from passing through the filter plate under high speed and high pressure, ensuring the filtration efficiency and prolonging the service life of the filter medium.

The present invention proposes a filtering device, wherein the air bag is connected with the air guide pipe, and the inlet pipe and the air guide pipe are both located above the front casing to form an air bag backwashing structure. After the air in the airbag is exhausted, all valves are closed, only the inlet valve is opened, water flow is introduced, then the inlet valve is closed, the gas valve is opened, the negative pressure in the airbag will attract the liquid upward, and then squeeze the airbag, through the contraction and expansion of the airbag , make the fluid vibrate repeatedly, reversely pull out the particles on the filter plate, so as to achieve the purpose of thorough cleaning.

The present invention proposes a filtering device, wherein the drainage pipe is located at the lower side of the front casing, and the outlet pipe is located at the bottom of the rear casing, and these pipes together with the inlet pipe form a backwashing system. Close the gas valve, open other valves, feed water to the inlet pipe and outlet pipe at the same time, the water inlet speed of the inlet pipe is lower than the water inlet speed of the outlet pipe, and the pressure difference formed will flush the particles on the filter plate into the drain pipe, not only removing the particles on the surface of the filter plate , and can remove larger particles inside the filter plate.

The present invention provides a filtering device, wherein the front shell and the rear shell are connected by bolts through a connecting plate. When the filter plate has reached the end of its service life or needs to be replaced with another type or material of filter plate, the bolt connection can be disassembled to separate the front shell from the rear shell and take out the filter plate.

The invention combines the backwashing structure of the airbag and the structure of the filter plate with angles, and realizes the multi-directional flushing function of the filter plate by controlling the switch of each valve, and at the same time prevents particles from penetrating the medium under a large impact force, and provides a good filtering effect, which is a good solution for industrial production. Purification needs to provide protection.

Description of drawings

Fig. 1 is a structural schematic diagram of a filtering device of the present invention.

Fig. 2 is a top view of a filtering device of the present invention shown in Fig. 1 .

In the figure: 1-airbag, 2-air guide pipe, 3-gas valve, 4-inlet valve, 5-inlet pipe, 6-front shell, 7-filter plate, 8-connecting plate, 9-drain pipe, 10 - drain valve, 11 - washer, 12 - outlet valve, 13 - outlet pipe, 14 - rear housing.

Detailed ways

As shown in Fig. 1 and Fig. 2, the present invention discloses a filter device, which belongs to the field of separation. It mainly includes air bag 1, air guide tube 2, gas valve 3, inlet valve 4, inlet pipe 5, front shell 6, rear shell 14, filter plate 7, connecting plate 8, drain pipe 9, drain valve 10, gasket 11 , outlet valve 12 and outlet pipeline 13. Wherein the airbag 1 is connected to the air guide pipe 2, the inlet pipe 5 and the air guide pipe 2 are located above the front housing 6, the drain pipe 9 is located on the lower side of the front housing 6, and the filter plate 7 and the gasket 11 are combined and installed at an angle of 45°. Between the front housing 6 and the rear housing 14 , the front housing 6 and the rear housing 17 are bolted through the connecting plate 8 , and the outlet pipe 13 is located at the bottom of the rear housing 14 .

One embodiment is shown in Figure 1. Under normal working conditions, the drain valve 10 and the gas valve 3 are closed, the inlet valve 4 and the outlet valve 12 are opened, and the liquid passes through the front casing 6 from top to bottom, passes through the filter plate 7, and reaches the Rear case 14.

When backwashing during shutdown, close the gas valve 3, open the inlet valve 4, outlet valve 12 and drain valve 10, the inlet pipe 5 is filled with water downwards, the water flow velocity is 0.8m/s, the outlet valve 12 supplies water upwards, and the water flow velocity is 1m /s, the backwashed particles flow out from the drainage pipe 9. Then close the drain valve 10, the inlet valve 4 and the gas valve 3, open the outlet valve 12, feed water upwards, keep the negative pressure in the air bag 1, when the water supply reaches 1/3, close the outlet valve 12, open the gas valve 3, through the external connection The cooperation of pressure and water pressure makes the air bag 1 shrink and expand regularly, makes the water flow vibrate, and cleans the filter plate 7 thoroughly.

When shutting down for maintenance, the bolts on the connecting plate 8 are unscrewed, the front housing 6 is separated from the rear housing 14, and the gasket 11 and the filter plate 7 are replaced.

Claims (4)

1. A filter device, characterized in that it mainly includes an air bag, an air guide tube, a gas valve, an inlet valve, an inlet pipe, a front shell, a rear shell, a filter plate, a connecting plate, a drain pipe, a drain valve, a gasket, and an outlet The valve and the outlet pipe, in which the air bag is connected to the air guide pipe, the inlet pipe and the air guide pipe are located above the front shell, the drain pipe is located on the lower side of the front shell, and the filter plate and gasket are combined and installed on the front shell and the front shell at an angle of 45° Between the rear shells, the front shell and the rear shell are connected by connecting plate bolts, and the outlet pipe is located at the bottom of the rear shell. 2 . A filtering device according to claim 1 , wherein the air bag is connected to the air guide pipe, and the inlet pipe and the air guide pipe are located above the front casing, forming an air bag backwashing structure. 3. A filtering device according to claim 1, wherein the drainage pipe is located at the lower side of the front casing, and the outlet pipe is located at the bottom of the rear casing, and these pipes together with the inlet pipe form a backwashing system. 4. A filtering device according to claim 1, wherein the front shell and the rear shell are connected by bolts through a connecting plate.