Powder resin filter system

Abstract

The invention discloses a powder resin filter system which comprises a resin mixing box, a film laying auxiliary box and a filter, an outlet pipe of the film laying auxiliary box is communicated with an inlet pipe of the filter, a film laying pump is arranged on the inlet pipe of the filter, and an inlet pipe of the film laying auxiliary box is communicated with an outlet pipe of the filter. An outlet pipe of the resin mixing box is communicated with an outlet pipe of the film laying auxiliary box and provided with a resin injection pump, the film laying auxiliary box is provided with a water injection port and an overflow port, the water injection port is externally connected with a first water injection pipe capable of being connected and disconnected, and the overflow port is located in a top plate of the film laying auxiliary box and connected with an overflow pipe. The highest point of the overflow pipe is not lower than the highest point of the inner cavity of the filter. According to the powder resin filter system disclosed by the invention, the filter can be always kept in a full-water state in a membrane paving stage, so that complete membrane paving of a filter element is realized.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, in particular to a powder resin filter system. Background Art

[0002] The powder-coated filter for power plant condensate polishing is to cover the powdered cation and anion exchange resin and fiber powder mixture filter material on the surface of the wound filter element through water flow, so that it forms a thin layer of filter membrane, and the water is filtered from the outside to the inside through the filter membrane. The coated filter membrane can protect the filter element from direct contact with iron corrosion products and contamination. The membrane layer has a certain elasticity, which can ensure long-term operation without being compacted, resulting in the filter operating pressure difference rising too fast.

[0003] During specific operation, after the powdered resin and fiber powder are evenly mixed, they are sent into the film laying circulation pipeline by the injection pump, and powered by the film laying pump to be coated on the surface of the filter element. Before film laying, the filter and the film laying auxiliary box will be filled with water in advance, and a film laying pre-circulation will be established. When the slurry injection starts, additional liquid will be added to the film laying circulation system. Therefore, during the entire slurry injection stage, water will continue to overflow from the overflow pipe of the film laying auxiliary box. Since the height of the film laying auxiliary box is much lower than the filter, overflow will continue during the film laying circulation process, causing the water level of the filter to drop, resulting in the inability to effectively lay the film on the top of the filter element. Summary of the invention

[0004] The technical problem to be solved by the present invention is that, in view of the defects and shortcomings of the prior art, a powder resin filter system is proposed, in which the filter can always be kept full of water during the membrane laying stage, thereby achieving complete membrane laying of the filter element.

[0005] The powder resin filter system of the embodiment of the present invention comprises a resin mixing box, a film laying auxiliary box and a filter, the outlet pipe of the film laying auxiliary box is connected with the inlet pipe of the filter and a film laying pump is provided on the inlet pipe of the filter, the inlet pipe of the film laying auxiliary box is connected with the outlet pipe of the filter, the outlet pipe of the resin mixing box is connected with the outlet pipe of the film laying auxiliary box and a resin injection pump is provided thereon, the film laying auxiliary box is provided with a water injection port and an overflow port, the water injection port is externally connected to a first water injection pipe which can be turned on and off, the overflow port is located on the top plate of the film laying auxiliary box and is connected to an overflow pipe, the highest point of the overflow pipe is not lower than the highest point of the inner cavity of the filter.

[0006] In the powder resin filter system in the embodiment of the present invention, the outlet pipe of the film laying auxiliary box is connected with the inlet pipe of the filter and a film laying pump is provided on the inlet pipe of the filter, the inlet pipe of the film laying auxiliary box is connected with the outlet pipe of the filter, the outlet pipe of the resin mixing box is connected with the outlet pipe of the film laying auxiliary box and a resin injection pump is provided thereon, the film laying auxiliary box is provided with a water injection port and an overflow port, the water injection port is externally connected to a first water injection pipe which can be turned on and off, the overflow port is located on the top plate of the film laying auxiliary box and is connected to an overflow pipe, the highest point of the overflow pipe is not lower than the highest point of the inner cavity of the filter, thereby, during the film laying stage, the filter can always remain full of water, thereby achieving complete film laying of the filter element.

[0007] In some embodiments, the overflow pipe is in an inverted "U" shape, and the outlet end of the overflow pipe is connected to the drainage ditch.

[0008] In some embodiments, a sewage outlet is further provided at the bottom of the film laying auxiliary box, and a switchable first sewage outlet is provided at the sewage outlet, and an outlet end of the first sewage outlet is connected to the drainage ditch.

[0009] In some embodiments, the powder resin filter system further comprises a second water injection pipe which can be switched on and off, wherein the second water injection pipe is connected to an inlet pipe of the filter and is located downstream of the film laying pump.

[0010] In some embodiments, the outlet pipe of the filter is externally connected to a filter outlet branch, and the filter outlet branch is provided with a first switch valve.

[0011] In some embodiments, a second switch valve is provided on the inlet pipe of the film laying auxiliary box; a third switch valve is provided on the inlet pipe of the filter and the third switch valve is located at the outlet side of the film laying pump.

[0012] In some embodiments, a fourth switch valve is disposed on the outlet pipeline of the resin mixing box and the fourth switch valve is located at the outlet side of the resin injection pump.

[0013] In some embodiments, the powder resin filter system also includes a holding pump and a circulation branch, the two ends of the circulation branch are respectively connected to the inlet pipe of the filter and the outlet pipe of the filter, the holding pump is arranged on the circulation branch and a fifth switch valve is provided on the circulation branch.

[0014] In some embodiments, a first liquid level gauge is provided at the film laying auxiliary box, and a second liquid level gauge is provided at the resin mixing box.

[0015] In some embodiments, the resin mixing box is connected to a third water injection pipe, and the outlet pipe of the resin mixing box is externally connected to a second drain pipe that can be switched on and off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of a powder resin filter system according to an embodiment of the present invention.

[0017] Reference numerals:

[0018] Resin mixing box 1, agitator 2, second liquid level meter 3, second sewage pipe 4, third water injection pipe 5, resin injection pump 6, fourth switch valve 7, film laying pump 8, third switch valve 9, fifth switch valve 10, holding pump 11, first switch valve 12, second switch valve 13, filter 14, second water injection pipe 15, first water injection pipe 16, film laying auxiliary box 17, overflow pipe 18, first sewage pipe 19, filter outlet pipe 20. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] like Figure 1 As shown, the powder resin filter system of the present invention includes a resin mixing box 1, a film laying auxiliary box 17 and a filter 14, the outlet pipe of the film laying auxiliary box 17 is connected with the inlet pipe of the filter 14 and a film laying pump 8 is provided on the inlet pipe of the filter 14, the inlet pipe of the film laying auxiliary box 17 is connected with the outlet pipe of the filter 14, the outlet pipe of the resin mixing box 1 is connected with the outlet pipe of the film laying auxiliary box 17 and a resin injection pump 6 is provided thereon, the film laying auxiliary box 17 is provided with a water injection port and an overflow port, the water injection port is externally connected to a first water injection pipe 16 which can be turned on and off, the overflow port is located on the top plate of the film laying auxiliary box 17 and is connected to an overflow pipe 18, the highest point of the overflow pipe 18 is not lower than the highest point of the inner cavity of the filter 14.

[0021] Specifically, the resin mixing box 1 is used to mix the resin and fiber powder evenly, and the filter 14 and the film laying auxiliary box 17 are filled with water in advance using the first water injection pipe 16 before film laying, and a pre-film laying cycle is established. When film laying begins, the mixture in the resin mixing box 1 is discharged through the outlet pipe of the resin mixing box 1 and flows toward the outlet pipe of the film laying auxiliary box 17 under the action of the resin injection pump 6, that is, the slurry is injected into the film laying pre-circulation pipeline, and then, driven by the film laying pump 8, the slurry enters the filter 14 from the inlet pipe of the filter 14 and is coated on the surface of the filter element for film laying, and the slurry circulated from the filter 14 enters the film laying auxiliary box 17 through the inlet pipe of the film laying auxiliary box 17 for recycling.

[0022] It should be noted that the overflow port of the conventional film laying auxiliary box 17 is set on the side, and it is impossible to ensure that the filter 14 is always filled with demineralized water containing fiber powder and resin powder during the film laying process, resulting in the inability to effectively lay the film on the top of the filter element. Based on this problem, the inventor of the present application sets the overflow port on the top plate of the film laying auxiliary box 17 and connects the overflow pipe 18 externally, and the highest point of the overflow pipe 18 is not lower than the highest point of the inner cavity of the filter 14, thereby preventing the water level in the filter 14 from dropping during the film laying stage, ensuring that the filter 14 is always full of water, and achieving complete film laying of the filter element.

[0023] In the powder resin filter system in the embodiment of the present invention, the outlet pipe of the film laying auxiliary box 17 is connected with the inlet pipe of the filter 14 and a film laying pump 8 is provided on the inlet pipe of the filter 14, the inlet pipe of the film laying auxiliary box 17 is connected with the outlet pipe of the filter 14, the outlet pipe of the resin mixing box 1 is connected with the outlet pipe of the film laying auxiliary box 17 and a resin injection pump 6 is provided thereon, the film laying auxiliary box 17 is provided with a water injection port and an overflow port, the water injection port is externally connected to a first water injection pipe 16 which can be turned on and off, the overflow port is located on the top plate of the film laying auxiliary box 17 and is connected to an overflow pipe 18, the highest point of the overflow pipe 18 is not lower than the highest point of the inner cavity of the filter 14, thereby, during the film laying stage, the filter 14 can always remain in a full water state, thereby achieving complete film laying of the filter element.

[0024] Furthermore, the overflow pipe 18 is in an inverted "U" shape, and the outlet end of the overflow pipe 18 is connected to the drainage ditch.

[0025] Furthermore, a sewage outlet is provided at the bottom of the film laying auxiliary box 17, and a switchable first sewage outlet pipe 19 is provided at the sewage outlet, and the outlet end of the first sewage outlet pipe 19 is connected to the drainage ditch. It should be noted that the slurry circulates between the filter 14 and the film laying auxiliary box 17 for many times to lay the film on the filter element. After the film laying is completed, there may be slurry and impurities accumulated at the bottom of the film laying auxiliary box 17. At this time, the first water injection pipe 16 can be used to clean the film laying auxiliary box 17, and the impurities can be discharged from the first sewage outlet pipe 19 to achieve online cleaning.

[0026] In some embodiments, the powder resin filter system further includes a second water injection pipe 15 which can be switched on and off. The second water injection pipe 15 is connected to the inlet pipe of the filter 14 and is located downstream of the film laying pump 8. Therefore, before film laying, the second water injection pipe 15 can be used to provide starting water for the filter 14 so that the filter 14 is full of water. In addition, the second water injection pipe 15 can also be used as an external water source for cleaning the filter 14, that is, when the filter 14 needs to be cleaned, the resin injection pump 6 can be turned off and water can be injected into the filter 14 through the second water injection pipe 15 for cleaning.

[0027] Furthermore, the outlet pipe of the filter 14 is externally connected to a filter outlet branch 20, the filter outlet branch 20 is provided with a first switch valve 12, the inlet pipe of the film laying auxiliary box 17 is provided with a second switch valve 13, the inlet pipe of the filter 14 is provided with a third switch valve 9 and the third switch valve 9 is located on the outlet side of the film laying pump 8, and the outlet pipeline of the resin mixing box 1 is provided with a fourth switch valve 7 and the fourth switch valve 7 is located on the outlet side of the resin injection pump 6.

[0028] Specifically, before film laying, the fourth switch valve 7 and the first switch valve 12 are closed, the second switch valve 13 and the third switch valve 9 are opened, the resin injection pump 6 is closed, the film laying pump 8 is turned on, the film laying pre-circulation is in a passage state, and the grouting pipeline is disconnected.

[0029] During film laying, the first switch valve 12 is closed, the second switch valve 13, the third switch valve 9 and the fourth switch valve 7 are opened, the resin injection pump 6 and the film laying pump 8 are both turned on, and the slurry is injected into the film laying circulation pipeline to start film laying on the filter element.

[0030] When cleaning the film laying auxiliary box 17, the third switch valve 9 is closed, the film laying pump 8 is closed, the first water injection pipe 16 is connected, and the first sewage discharge pipe 19 is connected.

[0031] When cleaning the filter 14, the third switch valve 9 and the second switch valve 13 are closed, the first switch valve 12 is opened, and the second water injection pipe 15 is connected.

[0032] In some embodiments, the powder resin filter system further includes a holding pump 11 and a circulation branch, the two ends of the circulation branch are connected to the inlet pipe of the filter 14 and the outlet pipe of the filter 14 respectively, the holding pump 11 is arranged on the circulation branch and the circulation branch is provided with a fifth switch valve 10. It should be noted that, after the slurry injection is completed, some power plants put the filter 14 into operation after the film laying cycle time is too short, resulting in a large number of flocs still floating in the filter 14 after the filter 14 is put into operation, and the powder resin and fiber powder are put into operation before they are fully filmed, which may cause leakage of the powder resin and fiber powder in the initial operation. Therefore, the inventor of the present application believes that after the slurry injection is completed, the film laying cycle lasts for at least 30 minutes to ensure that there are no suspended flocs in the filter 14 before the filter 14 is put into operation, and at the end of the film laying cycle, the holding pump 11 is started first, and then the film laying pump 8 is turned off, and then the filter 14 is pressurized. After the pressure is increased, the filter 14 is put into operation, and after the filter 14 runs smoothly, the holding pump 11 is turned off, which can avoid the membrane layer falling off caused by the sudden change of pressure and flow during operation.

[0033] In some embodiments, a first liquid level meter is provided at the film laying auxiliary box 17, and a second liquid level meter 3 is provided at the resin mixing box 1. Thus, the first liquid level meter can provide real-time feedback on the liquid level in the film laying auxiliary box 17, and provide timely feedback when the liquid level is not full, and the second liquid level meter 3 can provide real-time feedback on the liquid level in the resin mixing box 1, ensuring that the resin mixing box 1 is always full of water.

[0034] In some embodiments, the resin mixing box 1 is connected to a third water injection pipe 5, and the outlet pipe of the resin mixing box 1 is externally connected to a second drain pipe 4 that can be switched on and off. Specifically, an agitator 2 is provided in the resin mixing box 1, and after the third water injection pipe 5 injects water into the resin mixing box 1, the powdered resin and the fiber powder can be mixed to form a slurry under the action of the agitator 2, and the second drain pipe 4 can be used for cleaning and discharging slag from the resin mixing box 1.

[0035] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A powder resin filter system, characterized in that: It includes a resin mixing box, a film laying auxiliary box and a filter, the outlet pipe of the film laying auxiliary box is connected with the inlet pipe of the filter and a film laying pump is provided on the inlet pipe of the filter, the inlet pipe of the film laying auxiliary box is connected with the outlet pipe of the filter, the outlet pipe of the resin mixing box is connected with the outlet pipe of the film laying auxiliary box and a resin injection pump is provided thereon, the film laying auxiliary box is provided with a water injection port and an overflow port, the water injection port is externally connected to a first water injection pipe which can be turned on and off, the overflow port is located on the top plate of the film laying auxiliary box and is connected to an overflow pipe, the highest point of the overflow pipe is not lower than the highest point of the inner cavity of the filter.

2. The powder resin filter system according to claim 1, characterized in that The overflow pipe is in an inverted "U" shape, and the outlet end of the overflow pipe is connected to the drainage ditch.

3. The powder resin filter system according to claim 2, characterized in that A sewage outlet is also provided at the bottom of the film laying auxiliary box. A first sewage outlet pipe which can be switched on and off is provided at the sewage outlet. The outlet end of the first sewage outlet pipe is connected to the drainage ditch.

4. The powder resin filter system according to claim 1, characterized in that It also includes a second water injection pipe that can be switched on and off. The second water injection pipe is connected to the inlet pipe of the filter and is located downstream of the membrane laying pump.

5. The powder resin filter system according to claim 4, characterized in that The outlet pipe of the filter is externally connected to a filter outlet branch, and the filter outlet branch is provided with a first switch valve.

6. The powder resin filter system according to claim 5, characterized in that A second switch valve is provided on the inlet pipe of the film laying auxiliary box; a third switch valve is provided on the inlet pipe of the filter and the third switch valve is located at the outlet side of the film laying pump.

7. The powder resin filter system according to claim 6, characterized in that The outlet pipeline of the resin mixing box is provided with a fourth switch valve and the fourth switch valve is located at the outlet side of the resin injection pump.

8. The powder resin filter system according to claim 6, characterized in that It also includes a holding pump and a circulation branch, the two ends of the circulation branch are respectively connected to the inlet pipe of the filter and the outlet pipe of the filter, the holding pump is arranged on the circulation branch and a fifth switch valve is arranged on the circulation branch.

9. The powder resin filter system according to claim 1, characterized in that The film laying auxiliary box is provided with a first liquid level meter, and the resin mixing box is provided with a second liquid level meter.

10. The powder resin filter system according to claim 1, characterized in that The resin mixing box is connected to a third water injection pipe, and the outlet pipe of the resin mixing box is externally connected to a second sewage pipe which can be switched on and off.

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