Uniform water inlet device of denitrification deep-bed filter

Abstract

The utility model discloses a uniform water inlet device of a denitrification deep bed filter, which comprises two longitudinal water inlet weirs arranged along the length direction of a strip-shaped filter, a plurality of transverse water inlet weirs are arranged between the two longitudinal water inlet weirs, and the bottoms of the transverse water inlet weirs are as high as the bottoms of the longitudinal water inlet weirs. And the top of the transverse water inlet weir is lower than that of the longitudinal water inlet weir. By arranging a plurality of adjustable transverse water inlet weirs, sewage uniformly flows into the transverse water inlet weirs from the longitudinal water inlet weirs, the water level in the transverse water inlet weirs rises to the top of the weirs, and the sewage turns over the top of the weirs and flows into the filter, so that the problems that the water inlet uniformity of the denitrification deep-bed filter is relatively poor, and the sewage cannot flow into the filter are effectively solved. And the problems of SS penetration and poor denitrification nitrogen removal effect caused by non-uniform distribution of sewage in the filter material are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely is a kind of even water inlet device of denitrification deep bed filter. BACKGROUND

[0002] Denitrification deep bed filter is mostly long strip filter, and the width of filter does not exceed 4.88m, and the length can reach 28m at most, and filter material fills the entire filter in filter.Inlet water flows into from the upper part of filter, and flows out from the lower part, and inlet water needs to be evenly distributed to the entire filter, and sewage flows through all filter materials in filter, so as to fully exert the filtering and denitrification ability of filter material.

[0003] Referring to Figure 1 And Figure 2 At present, the inlet water of denitrification deep bed filter is mostly set two inlet weirs on the wall of filter in the upper part of filter along the length direction of long strip filter, and water flow flows into filter through inlet weir, and flows through filter material from top to bottom.By adjusting the height of weir plate of inlet weir, sewage is evenly inlet along weir plate.

[0004] But this inlet water mode can only flow into filter along inlet weir in straight line, and then be distributed to the middle part of filter from both sides, so that the flow of sewage of filter material in the middle part of filter is extremely low due to the far distance from inlet weir, and the role of middle filter material cannot be fully exerted, and the water quantity of filter material under inlet weir is large, and the treatment load of filter material is high, and SS can easily penetrate filter layer, and denitrification effect is poor, and this inlet water mode is the process of linear diffusion to plane, and uniformity is poor.

[0005] And filter is long, and the length of traditional inlet weir is also long, and due to the influence of fluid transmission resistance, water level difference will be generated along inlet weir, and the water inlet quantity of inlet end close to inlet end is large, and the water inlet quantity of end of inlet weir is small.To solve this phenomenon, now, secondary adjustment of inlet weir plate is carried out after inlet water, and the uneven inlet water caused by water level difference is compensated, but this method adjusts weir plate after inlet water, and adjustment difficulty is large, and it is still not easy to adjust to uniform water distribution. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of even water inlet device of denitrification deep bed filter to solve the problems raised in the above background.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of even water inlet device of denitrification deep bed filter, including two longitudinal inlet weirs being set along the length direction of long strip filter, multiple transverse inlet weirs are set between the two longitudinal inlet weirs, the weir bottom of the transverse inlet weir is the same height with the weir bottom of longitudinal inlet weir, and the weir top of the transverse inlet weir is lower than the weir top of longitudinal inlet weir.

[0008] On the basis of the above technical scheme, the utility model further can make improvement as follows.

[0009] Optionally, the weir top of the transverse water inlet weir is 5cm lower than the weir top of the longitudinal water inlet weir.

[0010] Optionally, the transverse water inlet weir is an adjustable weir plate.

[0011] Optionally, the longitudinal water inlet weir is fixedly installed on the pool wall of the filter tank and is used for conveying sewage.

[0012] Optionally, the number of the transverse water inlet weirs is 6-8, and the plurality of transverse water inlet weirs are distributed in parallel.

[0013] Optionally, the transverse water inlet weir adopts a triangular weir plate or a rectangular weir plate.

[0014] Optionally, the transverse water inlet weir can be an inclined weir plate.

[0015] Beneficial effects

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The present application changes the water inlet of the denitrification deep bed filter tank from the traditional water inlet weir along the length of the filter tank to the longitudinal water inlet weir transmission and the transverse water inlet weir water distribution, effectively avoiding the problem of large water inlet at the inlet end and small water inlet at the end caused by the long length of the long strip-shaped filter tank.

[0018] 2. Since the long strip-shaped filter tank has a narrow width, the length of the transverse water inlet weir is small, and the transverse water inlet weir is water-inlet at both ends, so the present application greatly reduces the water level difference and the water inlet is more uniform.

[0019] 3. The present application adopts multi-point water inlet distribution, compared with the traditional linear water inlet distribution, the sewage is more evenly distributed in the filter material, and the effective use rate of the filter material is higher.

[0020] 4. The present application sets the transverse water inlet weir in the width direction of the filter tank as an adjustable weir plate, which can further improve the uniformity of the water inlet, and since the width of the filter tank is significantly smaller than the length of the filter tank, compared with the longitudinal water inlet weir adjusting the length direction of the filter tank in the prior art, the present application is more difficult to adjust the transverse water inlet weir, and it is also easier to adjust to uniform water distribution. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a sectional view of the water inlet device of the denitrification deep bed filter tank in the prior art.

[0022] Figure 2 It is a top view of the water inlet device of the denitrification deep bed filter tank in the prior art.

[0023] Figure 3 is a sectional view of the present application;

[0024] Figure 4 is a plan view of the present application.

[0025] In the figure: 1, filter tank; 2, longitudinal water inlet weir; 3, transverse water inlet weir; 4, filter material. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figure 3 and Figure 4 , the present application designs a uniform water inlet device for a denitrification deep-bed filter tank, which comprises two longitudinal water inlet weirs 2 arranged along the length direction of the long-strip-shaped filter tank 1, and a plurality of transverse water inlet weirs 3 arranged between the two longitudinal water inlet weirs 2. The weir bottom of the transverse water inlet weir 3 is at the same height as the weir bottom of the longitudinal water inlet weir 2, and the weir top of the transverse water inlet weir 3 is lower than the weir top of the longitudinal water inlet weir 2.

[0028] The filter tank 1 is provided with filter material 4. The longitudinal water inlet weir 2 is fixedly installed on the tank wall of the filter tank 1 and is used for conveying sewage.

[0029] The operation principle of the present application is as follows:

[0030] When the present application is operated, the sewage that needs to be denitrified first flows into the longitudinal water inlet weir 2 from one end of the filter tank 1 and is conveyed along the longitudinal water inlet weir 2, and can be conveyed to the last end of the filter tank 1. At the same time, the sewage conveyed along the longitudinal water inlet weir 2 flows into the transverse water inlet weir 3. When the water level in the transverse water inlet weir 3 rises to the weir top, the sewage flows into the filter tank 1 by overturning the weir top, and is treated by the filter material 4.

[0031] The present application sets the weir bottom of the transverse water inlet weir 3 at the same height as the weir bottom of the longitudinal water inlet weir 2, and sets the weir top of the transverse water inlet weir 3 lower than the weir top of the longitudinal water inlet weir 2, so as to ensure that the sewage will not overturn the weir top and enter the filter tank 1 during the conveying process of the longitudinal water inlet weir 2, that is, the longitudinal water inlet weir 2 is used for conveying and the transverse water inlet weir 3 is used for water distribution. Thus, the uniformity of water inlet is greatly improved, the distribution of the sewage in the filter material 4 is more uniform, and the effective use rate of the filter material 4 is higher.

[0032] Preferably, the transverse water inlet weir 3 adopts a triangular weir plate or a rectangular weir plate, so as to not only meet the requirements of the present application, but also significantly reduce the processing difficulty and the use and maintenance cost.

[0033] In actual use, the transverse water inlet weir 3 can also be designed as other shapes of weir plates according to requirements, which will not be described here.

[0034] The following is an embodiment of the present application

[0035] Embodiment 1

[0036] The uniform water inlet device of the denitrification deep bed filter of the present embodiment is basically consistent with the above basic design of the present application.

[0037] As shown in Figure 4 , the length of the filter 1 of the present embodiment is 21 m, the width is 4 m, the number of the transverse water inlet weirs 3 is set to 6, the 6 transverse water inlet weirs 3 are sequentially spaced and distributed in parallel, and the weir top of the transverse water inlet weir 3 is 5 cm lower than the weir top of the longitudinal water inlet weir 2.

[0038] When the device of the present embodiment is running, the water inlet process is basically the same as the above running principle. The uniformity of the distribution of sewage in the filter material 4 is good, and compared with the existing linear water inlet mode, the effective use rate of the filter material 4 has been significantly improved.

[0039] Preferably, in the present embodiment, the distance a between the transverse water inlet weir 3 close to the water inlet end of the filter 1 and the inner wall of the filter 1 is greater than the distance b between the transverse water inlet weir 3 close to the last end of the filter 1 and the inner wall of the filter 1, so as to further improve the uniformity of water inlet and prevent the problem of large water inlet at the water inlet end and small water inlet at the end.

[0040] Embodiment 2

[0041] The uniform water inlet device of the denitrification deep bed filter of the present embodiment is basically consistent with the above basic design of the present application.

[0042] The transverse water inlet weir 3 of the present embodiment is an adjustable weir plate.

[0043] When the device of the present embodiment is running, the height of the weir plate of the transverse water inlet weir 3 can be adjusted according to the situation, so as to further improve the uniformity of water inlet. In addition, since the width of the filter 1 is significantly smaller than the length of the filter 1, compared with the longitudinal water inlet weir 2 in the prior art which adjusts the length direction of the filter 1, the difficulty of adjusting the transverse water inlet weir 3 of the present embodiment is smaller, and it is easier to adjust to uniform water distribution.

[0044] Embodiment 3

[0045] The uniform water inlet device of the denitrification deep bed filter of the present embodiment is basically consistent with the above basic design of the present application.

[0046] The transverse water inlet weir 3 of the embodiment is a slant weir plate. That is, the transverse water inlet weir 3 can be adjusted to be a slant weir plate with a certain angle with the longitudinal water inlet weir 2, for example, the angle of the embodiment is 75°, to further ensure uniform water inlet.

[0047] In actual use, the transverse water inlet weir 3 can also be set to a slant weir plate with other angles according to needs.

[0048] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A uniform water feeding device for a denitrification deep bed filter tank, comprising two longitudinal water feeding weirs (2) arranged along the length direction of the long strip-shaped filter tank (1), characterized in that: A plurality of transverse water inlet weirs (3) are arranged between the two longitudinal water inlet weirs (2), the weir bottom of the transverse water inlet weirs (3) is at the same height as the weir bottom of the longitudinal water inlet weirs (2), and the weir top of the transverse water inlet weirs (3) is lower than the weir top of the longitudinal water inlet weirs (2).

2. The uniform water distribution device for a denitrification deep bed filter according to claim 1, characterized in that: The weir top of the transverse water inlet weirs (3) is 5 cm lower than the weir top of the longitudinal water inlet weirs (2).

3. The uniform water distribution device for a denitrification deep bed filter according to claim 1, characterized in that: The transverse water inlet weirs (3) are adjustable weir plates.

4. The uniform water distribution apparatus for a denitrification deep bed filter according to claim 1, wherein: The longitudinal water inlet weirs (2) are fixedly installed on the pool wall of the filter tank (1) and are used for conveying sewage.

5. The uniform water distribution apparatus for a denitrification deep bed filter according to claim 1, wherein: The number of the transverse water inlet weirs (3) is 6-8, and the plurality of transverse water inlet weirs (3) are distributed in parallel.

6. The uniform water distribution apparatus for a denitrification deep bed filter according to claim 1, wherein: The transverse water inlet weirs (3) adopt triangular weir plates or rectangular weir plates.

7. The uniform water distribution apparatus for a denitrification deep bed filter according to claim 1, wherein: The transverse water inlet weirs (3) are inclined weir plates.

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