Sludge phosphorus recovery slurry replacement device

Abstract

The utility model relates to the technical field of phosphorus recovery, in particular to a sludge phosphorus recovery slurry replacement device which comprises a washing tank, a slurry cavity and a filtering cavity are arranged in the washing tank, a first filtering piece is arranged between the slurry cavity and the filtering cavity, a feeding port is formed in the top of the slurry cavity of the washing tank, and a slurry outlet is formed in the bottom of the slurry cavity of the washing tank; the filtering flushing part comprises a machine shell and a second filtering part arranged in the machine shell, the second filtering part divides the interior of the machine shell into a first cavity and a second cavity, the first cavity is communicated with the slurry cavity, a first valve is arranged between the first cavity and the slurry cavity, and the second cavity is provided with a circulating pipe; one end of the connecting pipe is connected to the filtering cavity, the other end of the connecting pipe communicates with the first cavity, and the connecting pipe is provided with a second valve. According to the utility model, the sludge can be subjected to water washing replacement in the water washing tank, so that the water washing frequency during the subsequent sludge filter pressing is reduced, and the problems in the prior art are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus recovery, in particular to a sludge phosphorus recovery slurry replacement device. Background Art

[0002] Sludge is often rich in phosphorus-containing substances, and phosphorus recovery in sludge is an important part of sludge treatment. For phosphorus recovery in sludge, anaerobic digestion, water-soluble replacement and other treatment methods are often used to convert phosphorus in sludge into a free state soluble in water, and then the phosphorus-containing substances are crystallized and precipitated by adding reagents to the phosphorus recovery tank to produce struvite reaction, so as to achieve the purpose of phosphorus recovery.

[0003] At present, in order to replace the phosphorus-containing substances in the sludge with water, the filtration and water washing are often switched repeatedly in the filter press to reduce the phosphorus content in the sludge after filtration. In this way, the filter press takes a long time and consumes a lot of energy in repeated filtration.

[0004] Therefore, there is an urgent need to improve the existing water-soluble replacement technology in sludge phosphorus recovery treatment. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a sludge phosphorus recovery slurry replacement device, which can wash and replace the sludge in the water washing tank to reduce the number of subsequent water washing times during sludge filter pressing, effectively solving the problems existing in the prior art.

[0006] In order to solve the above problems, the utility model provides a sludge phosphorus recovery slurry replacement device, including: a water washing tank, a mud chamber and a filter chamber are provided in the water washing tank, a first filter element is provided between the mud chamber and the filter chamber, and the water washing tank is provided with a feed inlet at the top of the mud chamber and a slurry outlet at the bottom; a filter flushing component, including a casing and a second filter element arranged in the casing, the second filter element divides the casing into a first chamber and a second chamber, the first chamber is connected to the mud chamber, a first valve is provided between the first chamber and the mud chamber, and the second chamber is provided with a flow pipe; a connecting pipe, one end of the connecting pipe is connected to the filter chamber, and the other end is connected to the first chamber, and the connecting pipe is provided with a second valve.

[0007] Furthermore, the second filter element includes a filter plate transversely arranged in the housing, the first cavity is located at the lower side of the second cavity, and the bottom of the first cavity is connected to the mud cavity.

[0008] Furthermore, the connecting pipe is connected to the upper section of the first cavity.

[0009] Furthermore, the filter plate includes a base plate connected to the housing and a filter cloth covering the base plate, and the base plate is configured to be hollow.

[0010] Furthermore, the casing comprises an upper shell and a lower shell that are interlocked, and the filter plate is clamped and fixed between the upper shell and the lower shell.

[0011] Furthermore, the upper shell and the lower shell are connected via a flange.

[0012] Furthermore, the connecting pipe is equipped with a delivery pump.

[0013] Furthermore, two flow pipes are provided, and each of the two flow pipes is provided with a second valve.

[0014] Furthermore, the water washing tank includes an outer shell and an inner cylinder arranged inside the outer shell, a filter cavity is formed between the outer shell and the inner cylinder, and the inner cylinder is provided with the first filter element.

[0015] Furthermore, the inner cylinder is evenly distributed with filter holes, and a stirring element is also provided on the inner side of the inner cylinder.

[0016] The beneficial effect of the utility model is that the sludge can be washed and replaced in the water washing tank to reduce the number of subsequent water washings during the sludge filter pressing, and effectively solves the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part 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 an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a schematic side sectional structure diagram of one embodiment of the utility model.

[0019] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at A in the illustrated embodiment.

[0020] Among them: 1. water washing tank; 101. outer shell; 102. inner cylinder; 2. mud chamber; 3. filter chamber; 4. feed port; 5. slurry outlet; 6. filter flushing part; 601. casing; 6011. upper shell; 6012. lower shell; 602. second filter element; 6021. substrate; 6022. filter cloth; 7. first chamber; 8. second chamber; 9. first valve; 10. circulation pipe; 11. connecting pipe; 12. second valve; 13. delivery pump; 14. stirring element. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0022] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0023] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In the present utility model, 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 directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are connected to form a whole only through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0026] In the present utility model, if Figure 1-2As shown, a sludge phosphorus recovery slurry replacement device is provided, comprising: a water washing tank 1, wherein a mud chamber 2 and a filter chamber 3 are provided in the water washing tank 1, a first filter element is provided between the mud chamber 2 and the filter chamber 3, the water washing tank 1 is provided with a feed port 4 at the top of the mud chamber 2 and a slurry outlet 5 at the bottom; a filtering flushing part 6, a casing 601, and a second filter element 602 arranged in the casing 601, the second filter element 602 divides the casing 601 into a first chamber 7 and a second chamber 8, the first chamber 7 is connected to the mud chamber 2, a first valve 9 is provided between the first chamber 7 and the mud chamber 2, and a flow pipe 10 is provided in the second chamber 8; a connecting pipe 11, one end of the connecting pipe 11 is connected to the filter chamber 3, and the other end is connected to the first chamber 7, and the connecting pipe 11 is provided with a second valve 12.

[0027] When the slurry replacement device of the utility model is used, the sludge to be treated enters the sludge chamber 2 from the feed port 4. At this time, the first valve 9 can be opened, and water can be introduced into the housing 601 through the circulation pipe 10. The water can wash and clean the sludge adhered to the side of the filter element facing the sludge chamber 2; after the water is passed through the washing tank 1, the soluble phosphorus-containing substances in the sludge in the washing tank 1 are dissolved in the water. Then the first valve 9 is closed, and water can be pumped out through the circulation pipe 10. The water in the filter chamber 3 passes through the connecting pipe 11, the first chamber 7, and the second chamber 8 and is then led out by the circulation pipe 10. At this time, the led water can flow into the phosphorus recovery tank for phosphorus recovery reaction.

[0028] After the sludge in the washing tank 1 is washed so that the content of soluble phosphorus in the sludge decreases, the slurry outlet 5 is opened to discharge the sludge in the washing tank 1 for the next step of filter pressing treatment.

[0029] The replacement device of the utility model repeatedly washes the sludge slurry with water in the washing tank 1 to reduce the content of soluble phosphorus in the sludge. Compared with the prior art, the number of filtration and washing can be reduced during the filter press treatment, thereby reducing the energy consumption of the filter press. In particular, when multiple washing tanks 1 are used in combination, the multiple washing tanks 1 can discharge the sludge outward in succession, thereby reducing the filtration and washing of a single batch of materials by the filter press, thereby improving the utilization efficiency of the filter press.

[0030] Moreover, in the utility model, by means of the filter flushing element 6, the water drawn out from the filter chamber 3 can be filtered through the second filter element 602 to reduce the flow of sludge to the phosphorus recovery tank. At the same time, by adding flushing water, the sludge adhered to the second filter element 602 can be flushed into the mud chamber 2 to maintain the passing capacity of the second filter element 602.

[0031] In the illustrated embodiment, to be more specific, as shown in the figure, the second filter element 602 includes a filter plate disposed transversely in the housing 601, the first chamber 7 is located at the lower side of the second chamber 8, and the bottom of the first chamber 7 is connected to the mud chamber 2. As shown in the figure, when water is discharged to the outside through the circulation pipe 10, the material filtered in the first chamber 7 by the first filter element is more likely to be deposited downward, so as to reduce the sludge adhering to the surface side of the first filter element in this process. When the circulation pipe 10 passes water into the washing tank 1, the sludge in the first chamber 7 can be conveniently flushed into the washing tank 1.

[0032] In the illustrated embodiment, more specifically, the connecting pipe 11 is connected to the upper section of the first chamber 7. By such a configuration, when water is introduced into the first chamber 7 through the connecting pipe 11, the scouring effect of the sludge deposited at the bottom of the first chamber 7 can be reduced.

[0033] As a selected embodiment, for the structure of the filter plate in the utility model, further specifically, the filter plate includes a base plate 6021 connected to the housing 601, and a filter cloth 6022 covering the base plate 6021, and the base plate 6021 is configured to be hollow. By providing the base plate 6021, the filter cloth 6022 is supported by the base plate 6021.

[0034] In the illustrated embodiment, the present invention is further optimized in that the housing 601 includes an upper housing 6011 and a lower housing 6012 that are interlocked, and the filter plate is clamped and fixed between the upper housing 6011 and the lower housing 6012. As shown in the figure, when the filter element needs to be inspected and maintained, the upper housing 6011 and the lower housing 6012 can be separated.

[0035] In the illustrated embodiment, as to the connection method of the upper shell 6011 and the lower shell 6012, to be more specific, the upper shell 6011 and the lower shell 6012 are connected via a flange.

[0036] In the illustrated embodiment, a further optimization of the present invention is that the connecting pipe 11 is provided with a delivery pump 13. As shown in the figure, by providing the delivery pump 13, the efficiency of the connecting pipe 11 pumping water from the filter chamber 3 can be improved.

[0037] In the illustrated embodiment, a further feature is that two flow pipes 10 are provided, and each of the two flow pipes 10 is provided with a second valve.

[0038] As shown in the figure, through such an arrangement, one of the flow pipes 10 can be connected to the phosphorus recovery tank to supply water to the phosphorus recovery tank. The other flow pipe 10 is connected to the water replenishment pipeline to replenish the washing water into the washing tank 1.

[0039] In the illustrated embodiment, for further specific description of the utility model, as shown in the figure, the washing tank 1 includes an outer shell 101 and an inner cylinder 102 arranged on the inner side of the outer shell 101, a filter chamber 3 is formed between the outer shell 101 and the inner cylinder 102, and the inner cylinder 102 is provided with the first filter element.

[0040] In the illustrated embodiment, a further optimized arrangement is that the inner cylinder 102 is evenly distributed with filter holes, and a stirring member 14 is also provided on the inner side of the inner cylinder 102 .

[0041] The filter holes evenly distributed in the inner cylinder 102 can improve the water exchange efficiency between the filter chamber 3 and the mud chamber 2, and the stirring member 14 can be used to promote the water-soluble replacement of soluble phosphorus-containing substances in the sludge. Moreover, the stirring member 14 can be used to stir the sludge adhered to the inner side of the inner cylinder 102 to fall off during the stirring process, thereby improving the permeability of the inner cylinder 102.

[0042] The stirring element 14 is preferably as shown in the figure, including a vertical stirring rod, fins arranged on the stirring rod, and a motor arranged at the bottom of the housing 101, and the motor drives the stirring rod to rotate.

[0043] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0044] The above is only the embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A sludge phosphorus recovery slurry replacement device, characterized in that: include: A water washing tank, wherein a mud chamber and a filter chamber are provided in the water washing tank, a first filter element is provided between the mud chamber and the filter chamber, and the water washing tank is provided with a feed inlet at the top of the mud chamber and a slurry outlet at the bottom; A filter flushing member, comprising a housing, and a second filter member disposed in the housing, wherein the second filter member divides the housing into a first chamber and a second chamber, wherein the first chamber is connected to the mud chamber, a first valve is disposed between the first chamber and the mud chamber, and a flow pipe is disposed in the second chamber; A connecting pipe, one end of which is connected to the filter cavity and the other end of which is connected to the first cavity, and the connecting pipe is provided with a second valve.

2. The sludge phosphorus recovery slurry replacement device according to claim 1, characterized in that: The second filter element includes a filter plate transversely arranged in the housing, the first cavity is located at the lower side of the second cavity, and the bottom of the first cavity is connected to the mud cavity.

3. The sludge phosphorus recovery slurry replacement device according to claim 2, characterized in that: The connecting pipe is connected to the upper section of the first cavity.

4. The sludge phosphorus recovery slurry replacement device according to claim 2, characterized in that: The filter plate includes a base plate connected to the housing and a filter cloth covering the base plate, and the base plate is configured to be hollow.

5. The sludge phosphorus recovery slurry replacement device according to claim 2, characterized in that: The casing comprises an upper shell and a lower shell which are buckled with each other, and the filter plate is clamped and fixed between the upper shell and the lower shell.

6. The sludge phosphorus recovery slurry replacement device according to claim 5, characterized in that: The upper shell and the lower shell are connected via a flange.

7. The sludge phosphorus recovery slurry replacement device according to claim 1, characterized in that: The connecting pipe is equipped with a delivery pump.

8. The sludge phosphorus recovery slurry replacement device according to claim 1, characterized in that: There are two flow pipes, and each of the two flow pipes is provided with a second valve.

9. The sludge phosphorus recovery slurry replacement device according to claim 1, characterized in that: The water washing tank comprises an outer shell and an inner cylinder arranged inside the outer shell, a filter cavity is formed between the outer shell and the inner cylinder, and the inner cylinder is provided with the first filter element.

10. The sludge phosphorus recovery slurry replacement device according to claim 9, characterized in that: The inner cylinder is evenly distributed with filtering holes, and a stirring piece is also arranged on the inner side of the inner cylinder.

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