Sewage treatment tank

Abstract

A sewage treatment tank comprises a bottom wall and a plurality of side walls, the bottom wall and the plurality of side walls at least partially enclose to form a treatment space, and sewage is purified in the treatment space; the at least one screen is arranged in the treatment space, the screen comprises a main body and a plurality of screen holes, the screen holes extend in the direction parallel to the axis of the main body, and the screen is configured to filter sewage; the gas pipeline is provided with a plurality of spraying holes, the spraying holes are formed near the screen, and the gas pipeline is configured to enable gas flow to be sprayed to the screen through the spraying holes.

Description

Technical Field

[0001] The utility model relates to a sewage treatment pool, and more specifically, to a sewage treatment pool which can avoid clogging of a screen. Background Art

[0002] In sewage treatment tanks, especially in biochemical treatment tanks, microbial fillers are used to purify sewage. In order to prevent the fillers from being lost with the sewage, a screen needs to be set to intercept the fillers. However, in the prior art, the screen is easily blocked (for example, fibers, hair, etc. in the sewage are entangled at the screen), which affects the sewage purification performance.

[0003] To this end, it is desired to propose a sewage treatment pool to improve the defects in the above-mentioned prior art. Utility Model Content

[0004] According to one aspect of the utility model, a sewage treatment tank is proposed, comprising: a bottom wall and a plurality of side walls, the bottom wall and the plurality of side walls at least partially enclosing a treatment space, wherein the sewage is purified in the treatment space; at least one screen, arranged in the treatment space, the screen comprising a main body and a plurality of screen holes, the screen holes extending in a direction parallel to the axis of the main body, the screen being configured to filter the sewage; a gas pipeline, provided with a plurality of spray holes, the spray holes being arranged near the screen, the gas pipeline being configured so that the airflow is sprayed onto the screen via the spray holes.

[0005] According to this solution, by arranging a gas pipeline, the airflow is sprayed onto the screen through the spray holes of the gas pipeline, which can clean the screen and blow away foreign matter clogging the screen, thereby making the screen less likely to be clogged.

[0006] In some embodiments, the spray holes may be aimed at the screen and the spray holes may be evenly distributed in the gas conduit.

[0007] According to this aspect, the airflow ejected from the ejection hole is directly directed toward the foreign matter clogging the screen, so that the foreign matter clogging the screen can be blown away more effectively.

[0008] In some aspects, the gas conduit may extend in a U-shape and be arranged adjacent to the screen along an edge of the screen.

[0009] According to this solution, the spray holes of the gas pipeline can spray air toward the screen in a fairly large range, so that foreign matter in various parts of the screen can be blown away by the air flow, further reducing the possibility of the screen being blocked.

[0010] In some solutions, the spray holes may be arranged below the screen.

[0011] According to this scheme, because the airflow ejected from the nozzle has a tendency to float upward in the wastewater, the gas pipeline is arranged below the screen, and the airflow ejected from the nozzle can more easily reach the position where the screen is located, and can exert a greater force on the foreign matter blocking the screen to blow away or destroy the foreign matter so that the foreign matter no longer blocks the screen.

[0012] In some embodiments, the screen may include an upper screen and a lower screen, the lower screen is closer to the bottom wall of the sewage treatment tank than the upper screen, and the spray holes are arranged between the upper screen and the lower screen.

[0013] In some aspects, the spray holes may be arranged closer to the upper screen than to the lower screen.

[0014] According to this solution, because the density of foreign matter blocking the screen is usually lower than that of wastewater, the foreign matter tends to float upward, causing the upper screen to be more susceptible to clogging by foreign matter than the lower screen. For this reason, the gas pipeline for blowing away or destroying foreign matter is arranged closer to the upper screen to preferentially clear the upper screen.

[0015] In some embodiments, the gas pipeline may include a gas inlet, and the compressed air enters the gas pipeline from the gas inlet and then is sprayed toward the screen from the spray hole.

[0016] In some embodiments, the distance between adjacent nozzle holes may be between 80 mm and 100 mm.

[0017] In some embodiments, the diameter of the nozzle hole may be between 5 mm and 8 mm.

[0018] In some embodiments, the distance between the spray hole and the screen may be between 200 mm and 300 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A front view of a sewage treatment tank according to an embodiment of the utility model is shown;

[0020] Figure 2 A side view of a sewage treatment tank according to an embodiment of the utility model is shown;

[0021] Figure 3 A top view of a sewage treatment tank according to an embodiment of the utility model is shown;

[0022] Figure 4 A front view showing the size design of a sewage treatment tank according to an embodiment of the utility model;

[0023] Figure 5 A side view showing the dimension design of a sewage treatment tank according to an embodiment of the utility model is shown.

[0024] Reference numerals:

[0025] 100 Sewage treatment tank

[0026] 102 bottom wall

[0027] 104 Sidewall

[0028] 110 Screen

[0029] 110-U Upper Screen

[0030] 110-L Lower Screen

[0031] 120 Gas pipeline

[0032] 122 nozzle

[0033] 124 Gas inlet

[0034] 130 valve DETAILED DESCRIPTION

[0035] In order to make the purpose, scheme and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0036] Figure 1 A front view of a sewage treatment tank 100 according to an embodiment of the utility model is shown. The sewage treatment tank 100 includes a bottom wall 102 and a plurality of side walls 104. The bottom wall 102 and the plurality of side walls 104 at least partially surround a treatment space, and the sewage is purified in the treatment space. In the sewage treatment tank 100, especially in the biochemical treatment tank, the sewage is purified by using microbial fillers. In order to prevent the fillers from being lost with the sewage, a screen 110 needs to be provided to intercept the fillers. The screen 110 is arranged in the treatment space. The screen 110 includes a cylindrical main body and a plurality of screen holes. The screen holes extend in a direction parallel to the axis of the main body (i.e., as shown in FIG. 1 ). Figure 1 The screen 110 is configured to filter sewage. It should be understood that "filtering" means intercepting microbial fillers in sewage and allowing other components of sewage to flow through. The utility model is not intended to limit the style and shape of the screen 110. For example, the style of the screen 110 may include a perforated plate, a grating, etc., and the shape may be a flat plate, a drum, etc.

[0037] However, in the prior art, the screen is easily clogged by foreign matter (for example, fibers, hair, etc. in sewage are entangled in the screen), which gradually reduces the water flow area, forming a water level difference at the least, and the filler will climb over the screen or cause the screen to collapse at the worst. Therefore, measures need to be taken to alleviate or even avoid the problem of the screen being clogged by foreign matter. To this end, the sewage treatment tank 100 of the utility model also includes a gas pipeline 120, and the gas pipeline 120 is provided with a plurality of spray holes 122, and the spray holes 122 are arranged near the screen 110. The gas pipeline 120 is configured so that the airflow is sprayed to the screen 110 through the spray holes 122. By arranging the gas pipeline 120, the airflow is sprayed to the screen 110 through the spray holes 122 of the gas pipeline 120, which can clean the screen 110 and blow away the foreign matter that clogs the screen 110. According to the above arrangement, on the one hand, the screen 110 can be effectively prevented from being blocked and the service life of the screen 110 can be extended, and on the other hand, the filler can be prevented from being lost and the process treatment effect can be ensured.

[0038] Preferably, the spray holes 122 can be aimed at the screen 110, and the spray holes 122 are evenly distributed in the gas pipeline 120. In this way, the airflow sprayed from the spray holes 122 is directly aimed at the foreign matter blocking the screen 110, so that the foreign matter blocking the screen 110 can be blown away more effectively. Figure 3 As shown, the gas pipeline 120 may extend in a U-shape and be arranged near the screen 110 along the edge of the screen 110. By arranging the spray holes 122 of the gas pipeline 120 along the edge of the screen 110, the spray holes 122 are distributed over a relatively large range of the screen 110, so that foreign matter in various parts of the screen 110 can be blown away by the airflow, further reducing the possibility of the screen 110 being blocked.

[0039] Preferably, the spray hole 122 can be arranged below the screen 110. Since the airflow sprayed from the spray hole 122 tends to float upward in the wastewater, the spray hole 122 is arranged below the screen 110, and the airflow sprayed from the spray hole 122 is more likely to float upward to the position where the screen 110 is located, and can exert a greater force on the foreign matter blocking the screen 110, so as to blow away or destroy the foreign matter, so that the foreign matter no longer blocks the screen 110.

[0040] Optionally, the screen 110 may include an upper screen 110-H and a lower screen 110-L, wherein the lower screen 110-L is closer to the bottom wall 102 of the sewage treatment tank 100 than the upper screen 110-H, and the spray holes 122 are arranged between the upper screen 110-H and the lower screen 110-L. Figure 1 Three upper screens 110 -H and two lower screens 110 -L are shown, but the present invention is not intended to be limited to the number and arrangement of the screens 110 .

[0041] Preferably, the spray hole 122 can be arranged closer to the upper screen 110-H relative to the lower screen 110-L. Because the density of foreign matter that blocks the screen 110 is usually less than the density of wastewater, the foreign matter tends to float upward, causing the upper screen 110-H to be more susceptible to clogging by foreign matter than the lower screen 110-L. For this reason, the spray hole 122 for blowing away or destroying foreign matter is arranged closer to the upper screen 110-H to preferentially dredge the upper screen 110-H.

[0042] Optionally, the gas pipeline 120 may include a gas inlet 124, and compressed air enters the gas pipeline 120 from the gas inlet 124 and then is ejected from the spray hole 122 toward the screen 110. In addition, the gas flow rate flowing into the gas pipeline 120 may be controlled by a valve 130. Depending on the specific application requirements, the valve 130 may be either a manual valve or an electric valve.

[0043] Preferably, the distance H2 between adjacent spray holes 122 may be between 80 mm and 100 mm. If the distance H2 between the spray holes 122 is too large, the spray holes 122 are sparsely distributed in space, and cannot fully remove foreign matter that blocks the screen 110. If the distance H2 between the spray holes 122 is too small, the spray holes 122 are too concentrated in space, which increases unnecessary costs and increases the difficulty of manufacturing the gas pipeline 120.

[0044] Preferably, the distance H1 between the spray hole 122 and the screen 110 may be between 200 mm and 300 mm. If the distance H1 between the spray hole 122 and the screen 110 is too small, it may be difficult to lay the gas pipeline 120 in a narrow space. If the distance H1 between the spray hole 122 and the screen 110 is too large, the flow velocity of the airflow sprayed from the spray hole 122 will drop significantly when it reaches the screen 110, and it may not be possible to blow away or destroy foreign matter blocking the screen 110.

[0045] Preferably, the diameter of the spray hole 122 may be between 5 mm and 8 mm. The diameter of the spray hole 122 may be designed according to the number of the spray holes 122 and the air flow rate entering the gas inlet 124, so that the air flow ejected from the spray hole 122 has a suitable flow rate. Preferably, the spray hole 122 may be made of stainless steel SS304 and SS316.

[0046] Preferably, if Figure 4 As shown, the distance L1 between the outer edges of two adjacent screens 110 can be greater than 1.5 to 3 times the diameter of the screen 110, and L1 is preferably designed to be between 800 mm and 1500 mm. Reasonable design of the size of L1 can arrange screens 110 of appropriate density, which helps to achieve optimized purification performance at a suitable cost.

[0047] Preferably, the distance L2 between the edge of the screen 110 and the side wall 104 may be greater than the diameter of the screen 110, and L2 is preferably designed to be between 500 mm and 800 mm. Figure 5 As shown, the distance L3 between the innermost end of the screen 110 and the side wall 104 is greater than two-thirds of the width L of the sewage treatment tank 100 .

[0048] In addition, the distance P1 between the upper screen 110-H and the liquid surface is between 450 mm and 1200 mm. Preferably, the distance P2 between the lower screen 110-L and the bottom wall 102 is about two-thirds of the depth P of the sewage treatment tank 100, and P2 is designed to be between 1000 mm and 2000 mm.

[0049] In addition, the diameter D of the cylindrical body of the screen 110 is designed to be between 300 mm and 2000 mm, more preferably, between 300 mm and 1000 mm. In addition, the length LEN of the cylindrical body of the screen 110 is designed to be between 1500 mm and 2000 mm.

[0050] It should be understood that the above-mentioned size design of the sewage treatment tank 100 in the embodiment of the utility model is only exemplary. The utility model is not intended to limit the specific size design of the sewage treatment tank 100, but any other suitable size can be designed for the sewage treatment tank 100 according to specific application requirements.

[0051] This document describes in detail several exemplary embodiments of the present invention with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A sewage treatment pool, characterized in that: include: a bottom wall and a plurality of side walls, wherein the bottom wall and the plurality of side walls at least partially enclose a treatment space in which sewage is purified; at least one screen disposed in the processing space, the screen comprising a main body and a plurality of screen holes, the screen holes extending in a direction parallel to an axis of the main body, the screen being configured to filter sewage; The gas pipeline is provided with a plurality of spray holes, wherein the spray holes are arranged near the screen, and the gas pipeline is configured so that the gas flow is sprayed to the screen through the spray holes.

2. The sewage treatment tank according to claim 1, characterized in that: The spray holes are aligned with the screen and are evenly distributed in the gas pipeline.

3. The sewage treatment pool according to claim 2, characterized in that: The gas duct extends in a U-shape and is arranged near the screen along an edge of the screen.

4. The sewage treatment tank according to claim 3, characterized in that: The spray holes are arranged below the screen.

5. The sewage treatment tank according to claim 1, characterized in that: The screen comprises an upper screen and a lower screen, the lower screen is closer to the bottom wall of the sewage treatment tank than the upper screen, and the spray holes are arranged between the upper screen and the lower screen.

6. The sewage treatment tank according to claim 5, characterized in that: The spray holes are arranged closer to the upper screen than to the lower screen.

7. The sewage treatment tank according to claim 1, characterized in that: The gas pipeline comprises a gas inlet, and compressed air enters the gas pipeline from the gas inlet and then is sprayed from the spray hole toward the screen.

8. The sewage treatment tank according to claim 1, characterized in that: The distance between adjacent nozzle holes is between 80 mm and 100 mm.

9. The sewage treatment tank according to claim 1, characterized in that: The diameter of the spray hole is between 5 mm and 8 mm.

10. The sewage treatment tank according to claim 1, characterized in that: The distance between the spray hole and the screen is between 200 mm and 300 mm.

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