A medium recovery filter

Abstract

The present invention provides a media recovery filter, comprising a vertical barrel filter; a vertically mounted wedge-shaped filter rod disposed within the vertical barrel filter; a water inlet at the bottom of the vertical barrel filter and a water outlet at the top of the vertical barrel filter, respectively connected to the left and right ends of a four-way reversing valve; the upper end of the four-way reversing valve being connected to a water outlet valve, the lower end of the four-way reversing valve being connected to a circulating water pump outlet, and the circulating water pump inlet being connected to a raw water valve. The media recovery filter of the present invention can intercept and filter wastewater containing diatomaceous earth or perlite generated during backwashing by conventional multi-media filters. The filtered clean water can be further used for backwashing the filter equipment, thereby directly recovering media such as diatomaceous earth or perlite and significantly reducing the clean water consumption of conventional multi-media filters during backwashing.

Description

Technical Field

[0001] The invention belongs to the field of environmental protection filtering equipment, and in particular relates to a medium recovery filter. Background Art

[0002] With the continuous development of society and the economy, the demand for water resources in industrial production and daily life is increasing. How to conserve precious water resources while ensuring water quality has become a growing issue. Under existing technical conditions, common water filtration equipment usually uses diatomaceous earth or perlite as the filter medium. After a period of use, large amounts of clean water must be used for backwashing to ensure the stability of the filter equipment performance. Therefore, there are common problems such as the inability to recycle the diatomaceous earth or perlite and the high consumption of clean water during backwashing. Summary of the Invention

[0003] In view of this, the present invention aims to propose a media recovery filter, which, in conjunction with a vertical barrel filter, a four-way reversing valve, a spiral pusher and a circulating water pump, can intercept and filter wastewater containing diatomaceous earth or perlite generated by common multi-media filters during backwashing. The filtered clean water can continue to be used for backwashing of the filtering equipment, realizing the direct recovery of media such as diatomaceous earth or perlite, and also greatly reducing the consumption of clean water sources by existing multi-media filters during backwashing.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A medium recovery filter comprises a vertical barrel filter; a vertically arranged wedge-shaped filter rod is provided in the vertical barrel filter; the water inlet at the bottom of the vertical barrel filter and the water outlet at the top of the vertical barrel filter are respectively connected to the left and right ends of a four-way reversing valve; the upper end of the four-way reversing valve is connected to the water outlet valve, the lower end of the four-way reversing valve is connected to the water outlet of a circulating water pump, and the water inlet of the circulating water pump is connected to a raw water valve; the water inlet of the circulating water pump is connected to one end of the circulating valve, and the other end of the circulating valve is connected to the upper end of the four-way reversing valve; a spiral pusher is provided at the bottom of the vertical barrel filter, and a slag discharge valve cooperating with the spiral pusher is provided at the bottom of the vertical barrel filter.

[0006] Furthermore, multiple vertical barrel filters are provided, and the top water outlets of all vertical barrel filters are connected, and the bottom water inlets of all vertical barrel filters are connected.

[0007] Furthermore, the water outlet of the raw water valve is connected to the water inlet of the circulating water pump through a primary filter.

[0008] Furthermore, the water inlet of the circulating water pump is connected to the dosing tank.

[0009] Furthermore, a drain valve is provided at the bottom of the vertical barrel filter.

[0010] Furthermore, the four-way reversing valve control end, the spiral pusher control end and the circulating water pump control end are respectively connected to the control cabinet.

[0011] Compared with the prior art, the media recovery filter of the present invention has the following advantages:

[0012] First, the medium recovery filter disclosed in the present invention can filter wastewater containing diatomaceous earth or perlite generated during backwashing of common multi-media filters. The filtered clean water can be further used for backwashing, thereby significantly saving water.

[0013] Second, the medium recovery filter disclosed in the present invention can filter and recover diatomaceous earth or perlite in the backwash wastewater of common multi-media filters, thereby achieving better environmental protection.

[0014] Third, the medium recovery filter disclosed in the present invention can realize the switching between the filtering function, the flushing function and the internal circulation operation mode through the cooperation between the circulation valve, the four-way reversing valve and the water outlet valve. It has the characteristics of rich functions and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] In the attached figure:

[0017] Figure 1 This is a schematic front view of a media recovery filter according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic top view of a media recovery filter according to an embodiment of the present invention;

[0019] Figure 3 This is a left side schematic diagram of a media recovery filter according to an embodiment of the present invention.

[0020] Description of reference numerals:

[0021] 1-outlet valve; 2-circulation valve; 3-raw water valve; 4-primary filter; 5-circulation water pump; 6-four-way reversing valve; 7-vertical barrel filter; 8-dosing barrel; 9-control cabinet; 10-drain valve; 11-screw pusher; 12-slag discharge valve. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0026] like Figure 1-3 As shown, a medium recovery filter includes a vertical barrel filter 7; a vertically arranged wedge-shaped filter rod is provided in the vertical barrel filter 7; the water inlet at the bottom of the vertical barrel filter 7 and the water outlet at the top of the vertical barrel filter 7 are respectively connected to the left and right ends of the four-way reversing valve 6; the upper end of the four-way reversing valve 6 is connected to the outlet valve 1, the lower end of the four-way reversing valve 6 is connected to the outlet of the circulating water pump 5, and the water inlet of the circulating water pump 5 is connected to the raw water valve 3; the water inlet of the circulating water pump 5 is connected to one end of the circulating valve 2, and the other end of the circulating valve 2 is connected to the upper end of the four-way reversing valve 6; a spiral pusher 11 is provided at the bottom of the vertical barrel filter 7, and a slag discharge valve 12 cooperating with the spiral pusher 11 is provided at the bottom of the vertical barrel filter 7.

[0027] like Figure 2-3 As shown, a drain valve 10 is provided at the bottom of the vertical barrel filter 7.

[0028] In this embodiment, the media recovery filter can implement the following functional processes:

[0029] Filtering function:

[0030] The wastewater containing diatomaceous earth or perlite on the outside is connected to the raw water valve 3, the circulation valve 2 is closed, and the four-way reversing valve 6 is set in the filtering state. The lower interface of the four-way reversing valve 6 is connected to the left interface, and the upper interface is connected to the right interface. The circulation valve 2 is opened. At this time, the wastewater is pushed by the circulation valve 2 and enters the bottom water inlet of the vertical barrel filter 7 through the four-way reversing valve 6. The wastewater containing diatomaceous earth or perlite forms a filter membrane on the surface of the wedge-shaped filter rod in the vertical barrel filter 7. The diatomaceous earth or perlite adheres to the surface of the wedge-shaped filter rod. The turbidity of the filtered water is less than 0.3NTU. The filtered clean water enters the inside of the wedge-shaped filter rod and is discharged through the water outlet at the top of the vertical barrel filter 7. It enters the four-way reversing valve 6 and is finally discharged through the outlet valve 1 and is reused as backwash water for a common multi-media filter.

[0031] During the operation of the filtering function, if the outlet valve 1 is closed and the circulation valve 2 is opened, the internal circulation operation mode of the medium recovery filter can be realized.

[0032] Media recovery function:

[0033] The media recovery filter is in a stationary state for 4 hours. During this period, the diatomaceous earth or perlite medium attached to the surface of the wedge-shaped filter rod in the vertical barrel filter 7 will fall off by itself and be deposited in the hopper of the spiral pusher 11 at the bottom of the vertical barrel filter 7. At this time, the drain valve 10 is opened to drain the water in the vertical barrel filter 7, and the slag discharge valve 12 is further opened, and the spiral pusher 11 is started to discharge the deposited diatomaceous earth or perlite medium to complete the media recovery.

[0034] Flushing function:

[0035] The external flushing water is connected to the raw water valve 3, the circulation valve 2 is closed, and the four-way reversing valve 6 is set in the flushing state. The lower interface of the four-way reversing valve 6 is connected to the right interface, and the upper interface is connected to the left interface. The circulation valve 2 is opened. At this time, the flushing water flows in the opposite direction, enters through the water outlet at the top of the vertical barrel filter 7, flushes the wedge-shaped filter rod from the inside out, and is discharged from the water inlet at the bottom of the vertical barrel filter 7, passes through the four-way reversing valve 6, and finally is discharged from the water outlet valve 1 to realize the internal flushing of the media recovery filter.

[0036] like Figure 1-2 As shown, there are multiple vertical barrel filters 7, and the top water outlets of all vertical barrel filters 7 are connected, and the bottom water inlets of all vertical barrel filters 7 are connected.

[0037] like Figure 1 As shown, the water outlet of the raw water valve 3 is connected to the water inlet of the circulating water pump 5 through the primary filter 4.

[0038] In this embodiment, the primary filter 4 can pre-filter large solid particles in the wastewater.

[0039] like Figure 1-2 As shown, the water inlet of the circulating water pump 5 is connected to the dosing barrel 8.

[0040] In this embodiment, the vertical barrel filter 7 may become clogged when the medium recovery filter is working for a long time, which reduces the working efficiency. At this time, sodium hypochlorite solution can be added into the dosing barrel 8 to clean the dirt attached to the vertical barrel filter 7 and discharge it.

[0041] like Figure 2-3 As shown, the control end of the four-way reversing valve 6 , the control end of the spiral pusher 11 and the control end of the circulating water pump 5 are respectively connected to the control cabinet 9 .

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A medium recovery filter, characterized by: The invention comprises a vertical barrel filter (7); a vertically arranged wedge-shaped filter rod is provided in the vertical barrel filter (7); a water inlet at the bottom of the vertical barrel filter (7) and a water outlet at the top of the vertical barrel filter (7) are respectively connected to the left and right ends of a four-way reversing valve (6); the upper end of the four-way reversing valve (6) is connected to a water outlet valve (1), the lower end of the four-way reversing valve (6) is connected to a water outlet of a circulating water pump (5), and the water inlet of the circulating water pump (5) is connected to a raw water valve (3); the water inlet of the circulating water pump (5) is connected to one end of a circulating valve (2), and the other end of the circulating valve (2) is connected to the upper end of the four-way reversing valve (6); a spiral pusher (11) is provided at the bottom of the vertical barrel filter (7), and a slag discharge valve (12) matched with the spiral pusher (11) is provided at the bottom of the vertical barrel filter (7); a drain valve (10) is provided at the bottom of the vertical barrel filter (7), and the drain valve (10) and the slag discharge valve (12) are arranged in parallel; The control end of the four-way reversing valve (6), the control end of the screw pusher (11), and the control end of the circulating water pump (5) are respectively connected to the control cabinet (9).

2. A media recovery filter according to claim 1, characterized in that: The vertical barrel filter (7) is provided in plurality, and the top water outlets of all the vertical barrel filters (7) are connected, and the bottom water inlets of all the vertical barrel filters (7) are connected.

3. The media recovery filter according to claim 1, characterized in that: The water outlet of the raw water valve (3) is connected to the water inlet of the circulating water pump (5) through a primary filter (4).

4. The media recovery filter according to claim 1, characterized in that: The water inlet of the circulating water pump (5) is connected to the medicine adding barrel (8).

Images