An off-line cleaning device for filter plates used in neutralizing sludge press filtration

Abstract

The utility model discloses a filter plate off -line cleaning device for neutralizing sludge filter pressing, include: cleaning water tank, and the cleaning water tank is the cavity that is equipped with the opening in top portion, water distribution hole board, water distribution hole board places in the bottom of cleaning water tank, the bottom of water distribution hole board is equipped with aeration pipeline and liquid inlet pipe, is used for to the inside of cleaning water tank is aeration and adds liquid, support rib, support rib places in the both sides of cleaning water tank inner wall, the beneficial effect of the utility model is: through the filter plate immersion cleaning of putting in the acid medium in the cleaning water tank, cooperation aeration bubble can help the uniform stirring of liquid, avoid the accumulation of precipitate and impurity in the bottom, keep the consistency of liquid, ensure the uniformity of immersion process, while avoiding the introduction of external chemical agent, significantly reduce the artificial cleaning intensity, have the effect of removing pertinence to the acid solubility dirt, can restore filter plate surface bump structure integrity, improve the cleaning operation quality stability.

Description

Technical Field

[0001] This utility model relates to the field of filter plate cleaning technology, specifically to an offline filter plate cleaning device for neutralized sludge pressure filtration. Background Technology

[0002] Cold rolling waste acid water comes from the production wastewater of pickling units and acid regeneration units. It includes various types of waste acid such as hydrochloric acid dilute acid water, mixed acid dilute acid water, and sulfuric acid dilute acid water. It is usually centrally treated by lime neutralization to generate neutralized sludge mainly composed of ferric hydroxide and calcium sulfate. Subsequently, it is dewatered and reduced in volume by diaphragm plate and frame filter press.

[0003] A typical diaphragm plate and frame filter press consists of alternating filter plates and frames, with filter cloth sandwiched between them, forming a filtration chamber through compression. The filter plates are made of polypropylene, with densely packed, precisely arranged protrusions on their surface forming a water flow channel system. This accelerates filtrate flow, shortening the filtration cycle, and simultaneously achieves deep dewatering of the sludge cake through diaphragm pressing. However, during long-term operation, this equipment is prone to problems such as filter cloth damage leading to sludge seeping into the flow channels, or blockage of the drain holes causing suspended solids to accumulate, resulting in the continuous accumulation of acid-soluble fouling within the flow channels. This fouling alters the protrusion structure on the filter plate surface, significantly reducing dewatering efficiency. Furthermore, the neutralized sludge, after being compressed under high pressure, exhibits extremely strong adhesion. Traditional manual washing methods suffer from low cleaning efficiency, high labor intensity, and easy damage to the filter cloth, sometimes necessitating direct replacement of the filter plate assembly. Utility Model Content

[0004] The purpose of this invention is to provide an offline cleaning device for filter plates used in sludge depressurization, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an offline filter plate cleaning device for neutralized sludge pressure filtration, comprising: The cleaning water tank is a cavity with an opening at the top; A water distribution perforated plate is placed at the bottom of the cleaning water tank. An aeration pipe and a liquid inlet pipe are installed at the bottom of the water distribution perforated plate for aeration and liquid addition to the interior of the cleaning water tank. Support ribs are placed on both sides of the inner wall of the cleaning water tank, and a flushing pipe is installed at the bottom of the aeration pipeline. A drain pipe is placed on one side of the cleaning water tank and above the water distribution plate. A circulating water pump connected to the flushing pipe is installed at the top of the drain pipe.

[0006] Preferably, the top of the cleaning water tank is equipped with a top cover, and the top cover has an exhaust hole in the middle.

[0007] Preferably, one end of the aeration pipe extends from one side of the cleaning water tank and is fixedly connected to an air inlet pipe. Both the top of the aeration pipe and the liquid inlet pipe are vertically installed with pipes, and the middle of the water distribution plate has holes that cooperate with the pipes.

[0008] Preferably, the top of the support rib is fixed with multiple limiting plates at equal intervals for positioning the filter plates, and the flushing pipe corresponds one-to-one with the limiting plates.

[0009] Preferably, the output end of the circulating water pump is fixedly connected to a vortex water pipe, which is connected to a flushing pipe, and cleaning nozzles with different orientations are fixedly connected to the outside of the flushing pipe.

[0010] Preferably, a liquid filling pipe is installed at one end of the liquid inlet pipe, and a solenoid valve is installed in the middle of both the liquid inlet pipe and the liquid filling pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The filter plates are immersed and cleaned by placing an acidic medium in the cleaning tank. The aeration bubbles help to evenly stir the liquid, prevent sediment and impurities from accumulating at the bottom, maintain the consistency of the liquid, and ensure the uniformity of the immersion process. This significantly reduces the intensity of manual cleaning while avoiding the introduction of external chemical agents. It has a targeted removal effect on acid-soluble dirt, can restore the integrity of the protrusion structure on the surface of the filter plate, and improve the stability of the cleaning operation quality. It can clean the clogged filter plates in a timely manner without affecting the operation of the plate and frame filter press, ensuring that the filter press's filtration performance is stable, protecting the filter cloth from damage, extending the service life of the plate and frame filter press, and resulting in significant economic benefits. The water tank occupies a small area, and the device can be fabricated on-site between the plates and frames. It can be directly connected to the filter press body for in-situ cleaning and regeneration, eliminating the need for filter plate disassembly and transportation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the circulating water pump of this utility model; Figure 3 This is a schematic diagram of the structure when the filter plate of this utility model is placed; Figure 4 This is a schematic diagram of the aeration pipeline of this utility model; Figure 5 This is a schematic diagram of the structure of the water distribution perforated plate of this utility model.

[0013] In the diagram: 1. Cleaning water tank; 2. Water distribution plate; 3. Support rib; 4. Limiting plate; 5. Flushing pipe; 6. Aeration pipe; 7. Orifice; 8. Air inlet pipe; 9. Liquid inlet pipe; 10. Liquid filling pipe; 11. Rotary water pipe; 12. Circulating water pump; 13. Drain pipe; 14. Top cover; 15. Vent; 16. Cleaning nozzle. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 , 2 As shown in Figures 3, 4, and 5, this utility model provides a technical solution: an offline filter plate cleaning device for neutralizing sludge pressure filtration, comprising: a PPH material cleaning water tank 1, an overflow pipe installed on one side of the top of the cleaning water tank 1, the overflow pipe being connected to the raw water regulating tank, the cleaning water tank 1 being a cavity with an opening at the top; a water distribution plate 2 fixedly installed at the bottom of the cleaning water tank 1, an aeration pipe 6 and a liquid inlet pipe 9 installed at the bottom of the water distribution plate 2, the liquid inlet pipe 9 being connected to a water source for aeration and liquid addition to the interior of the cleaning water tank 1; and a support rib 3 fixedly connected inside the cleaning water tank 1. On both sides of the wall, a flushing pipe 5 is installed at the bottom of the aeration pipe 6, and the flushing pipe 5 is fixed to the inner wall of the cleaning water tank 1. The drain pipe 13 is fixedly installed on one side of the cleaning water tank 1 and located above the water distribution plate 2. A circulating water pump 12 connected to the flushing pipe 5 is installed at the top of the drain pipe 13. A Y-shaped water pipe is fixedly connected to one end of the drain pipe 13 for discharging acid and water separately. A liquid addition pipe 10 is installed at one end of the liquid inlet pipe 9. The liquid addition pipe 10 is connected to the regulating tank through a lift pump to facilitate the introduction of waste acid stock solution. Solenoid valves are installed in the middle of both the liquid inlet pipe 9 and the liquid addition pipe 10.

[0016] It should be noted that this embodiment includes an operation panel and a corresponding controller. The water distribution plate 2 serves as the main support for the weight of the filter plate. The air outlet of the aeration pipe 6 is located corresponding to the limiting plate 4, used to inflate the filter plates. When the filter plates become clogged in the water flow channel, they are hoisted offline to the cleaning water tank 1 and placed on top of the support rib 3. The valve of the liquid addition pipe 10 is opened, and waste acid is filled into the cleaning water tank 1 through the liquid addition pipe 10 and the liquid inlet pipe 9. Then, the valve is adjusted to allow a small flow of acid to enter, and aeration is started through the aeration pipe 6 for stirring and air washing. After soaking for 2 days, the acid inlet valve is closed, the industrial water valve is opened, the acid is replaced, and the liquid is drained. The filter plates are then simply rinsed to clean the sludge accumulated in the water flow channel.

[0017] In one embodiment, a top cover 14 is installed on the top of the cleaning water tank 1, and an exhaust hole 15 is provided in the middle of the top cover 14.

[0018] It should be noted that in this embodiment, the top cover 14 is a transparent plastic plate made of PP material, with flat steel anchored around it. The flat steel is treated with anti-corrosion. The vent 15 can vent the air inside the cleaning water tank 1 when aeration is performed inside the cleaning water tank 1, thereby preventing the air pressure inside the cleaning water tank 1 from being too high. The top of the cleaning water tank 1 is equipped with a groove for placing the top cover 14. The top cover 14 is placed on top of the cleaning water tank 1. When the filter plate is hoisted, the top cover 14 can be removed or put on.

[0019] In one embodiment, one end of the aeration pipe 6 extends from one side of the cleaning water tank 1 and is fixedly connected to the air inlet pipe 8. Both the top of the aeration pipe 6 and the liquid inlet pipe 9 are vertically installed with pipes, and the middle of the water distribution plate 2 is provided with holes 7 that cooperate with the pipes.

[0020] It should be noted that in this embodiment, the air inlet pipe 8 is connected to a high-pressure air source. The high pressure is diverted into multiple aeration pipes 6 through the air inlet pipe 8 and blown into the cleaning water tank 1 through the pipe at the top of the aeration pipes 6. The aeration bubbles at the bottom can help to stir the liquid evenly, prevent sediment and impurities from accumulating at the bottom, maintain the consistency of the liquid, and ensure the uniformity of the soaking process.

[0021] In one embodiment, multiple limiting plates 4 are fixedly connected at equal intervals to the top of the support rib 3 for positioning the filter plates. The flushing pipe 5 corresponds one-to-one with the limiting plates 4. The output end of the circulating water pump 12 is fixedly connected to a swirl water pipe 11, which is connected to the flushing pipe 5. Cleaning nozzles 16 with different orientations are fixedly connected to the outside of the flushing pipe 5.

[0022] It should be noted that in this embodiment, a limiting plate is fixed on the support rib to facilitate the placement and positioning of the filter plate. The limiting plate 4 divides the top of the support rib 3 into multiple placement slots, and the two sides of the filter plate are placed in the placement slots, thereby limiting the position of the filter plate. At this time, the rinsing pipe 5 and the aeration pipe 6 are evenly distributed between two adjacent filter plates, which can facilitate cleaning and stirring of the cleaning position. After acid washing, the valve of the Y-shaped water pipe at the end of the drain pipe 13 is opened to discharge the acid to the collection tank. Then the valve of the liquid addition pipe 10 is closed and the valve of the liquid inlet pipe 9 is opened. Industrial water enters the cleaning water tank 1 through the liquid inlet pipe 9, and the water is sent into the vortex water pipe 11 by the circulating water pump 12. The water enters the rinsing pipe 5 through the vortex water pipe 11 and is sprayed onto the filter plates on both sides through the cleaning nozzle 16 to rinse the filter plates. After rinsing, the water is discharged through the drain pipe 13.

[0023] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An offline filter plate cleaning device for neutralizing sludge during pressure filtration, characterized in that: include: Cleaning water tank (1), the cleaning water tank (1) is a cavity with an opening at the top; Water distribution orifice plate (2) is placed at the bottom of the cleaning water tank (1). An aeration pipe (6) and a liquid inlet pipe (9) are installed at the bottom of the water distribution orifice plate (2) for aeration and liquid addition to the interior of the cleaning water tank (1). Support ribs (3) are placed on both sides of the inner wall of the cleaning water tank (1), and a flushing pipe (5) is installed at the bottom of the aeration pipe (6). Drain pipe (13) is placed on one side of the cleaning water tank (1) and above the water distribution plate (2). A circulating water pump (12) connected to the flushing pipe (5) is installed on the top of the drain pipe (13).

2. The offline cleaning device for filter plates used in sludge depress filtration according to claim 1, characterized in that: The top of the cleaning water tank (1) is equipped with a top cover (14), and an exhaust hole (15) is provided in the middle of the top cover (14).

3. The offline cleaning device for filter plates used in sludge depress filtration according to claim 1, characterized in that: One end of the aeration pipe (6) extends out from one side of the cleaning water tank (1) and is fixedly connected to the air inlet pipe (8). Both the top of the aeration pipe (6) and the liquid inlet pipe (9) are vertically installed with pipes. The middle part of the water distribution plate (2) is provided with holes (7) that cooperate with the pipes.

4. The offline cleaning device for filter plates used in sludge depress filtration according to claim 1, characterized in that: The top of the support rib (3) is fixed with multiple limiting plates (4) at equal intervals for placing and positioning the filter plates. The flushing pipe (5) corresponds one-to-one with the limiting plates (4).

5. The offline cleaning device for filter plates used in sludge depress filtration according to claim 1, characterized in that: The output end of the circulating water pump (12) is fixedly connected to a vortex water pipe (11), which is connected to a flushing pipe (5). Cleaning nozzles (16) with different orientations are fixedly connected to the outside of the flushing pipe (5).

6. The offline cleaning device for filter plates used in sludge depress filtration according to claim 1, characterized in that: A liquid inlet pipe (10) is installed at one end of the liquid inlet pipe (9), and a solenoid valve is installed in the middle of both the liquid inlet pipe (9) and the liquid inlet pipe (10).

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