Settling pond overflow weir water outlet front end blowdown device and method and settling pond

Abstract

The invention discloses a sedimentation tank overflow weir water outlet front end pollution discharge device and method and a sedimentation tank, and belongs to the technical field of sedimentation tank pollution discharge. Comprising a flow collecting piece arranged between the top surface of the overflow weir and the top surface of the filler. A dirt collecting channel is defined in the flow collecting piece, and a flow intercepting opening communicated with the dirt collecting channel is formed in the side, located on the top face of the overflow weir, of the flow collecting piece. Furthermore, one end of the flow collecting piece is connected with a flow guide pipe, and the flow guide pipe is communicated with the dirt collecting channel. The drainage valve is arranged on the flow guide pipe, when the drainage valve is opened, sewage in the sewage collection channel can be automatically drained through the flow guide pipe, and an extra water pump is not needed for drainage. And after sludge discharge at the bottom of the sedimentation tank is completed, inlet water flow enters the sedimentation tank to drive grease and suspended solids to rise together. When the water level rises to the height of the intercepting opening, grease and suspended solids on the upper layer of the water surface can flow into the dirt collecting channel through the intercepting opening and are discharged through the flow guide pipe.

Description

Technical Field

[0001] The present application relates to the technical field of sewage discharge from sedimentation tanks, and in particular to a sewage discharge device and method at the front end of the overflow weir of a sedimentation tank, and a sedimentation tank. Background Art

[0002] Inclined plate (inclined tube) sedimentation tanks generally require bottom desludge removal, flushing, and packing cleaning after 8-12 hours of operation. After closing the bottom desludge valve and restoring water inflow, during the initial phase of the water discharge (generally 8-10 minutes), the incoming water will carry grease and suspended solids remaining in the mixing tank, flocculation tank, inlet distribution area, and separation zone to the outlet weir, resulting in a high concentration of grease and suspended solids in the initial effluent water after desludge removal. This water enters the filter tank in the next process and is intercepted by the filter media, affecting the effluent volume and quality. Furthermore, grease and suspended solids entering the sedimentation tank shorten the filtration cycle, increase the frequency of backwashing, shorten the filter media life, and affect the normal operation of the filtration device. Summary of the Invention

[0003] The purpose of the present application is to provide a sewage discharge device and method at the front end of the overflow weir of a sedimentation tank, and a sedimentation tank, so as to solve the problem in the prior art that the early effluent after sludge discharge contains a large amount of grease and suspended matter.

[0004] To solve the above technical problems, this application is implemented by adopting the following technical solutions:

[0005] On the one hand, the present application provides a sedimentation tank overflow weir outlet front end sewage discharge device, comprising:

[0006] A flow collecting member is arranged between the top surface of the overflow weir and the top surface of the filler, and a sewage collecting channel is defined inside the flow collecting member. The flow collecting member is located on one side of the top surface of the overflow weir and has a cut-off port connected to the sewage collecting channel; one end of the flow collecting member is connected to a guide pipe, and the guide pipe is connected to the sewage collecting channel; a sewage valve is provided on the guide pipe, and when the sewage valve is opened, the sewage in the sewage collecting channel can be discharged through the guide pipe.

[0007] In this solution, after the sludge is discharged from the bottom of the sedimentation tank, the water inlet and drain valves of the sedimentation tank are opened, and the inlet water flows into the sedimentation tank, driving up the grease and suspended matter remaining in the mixing tank, flocculation tank, inlet distribution area, and separation area. Among them, grease and suspended matter will float on the upper layer of the water surface. When the water level rises to the height of the interceptor port, the grease and suspended matter located in the upper layer of the water surface will flow into the sewage collection channel through the interceptor port and be discharged through the diversion pipe. When the grease and suspended matter in the upper layer of the inlet water are completely discharged, the drain valve is closed. As the water flow continues to enter, the water level in the sedimentation tank will rise to the top surface of the overflow weir and flow out through the overflow weir.

[0008] This solution quickly removes grease and suspended solids from the effluent surface of the sedimentation tank overflow weir during the water inlet and outlet stages after draining the sedimentation tank and cleaning the filler. This prevents grease and suspended solids from flowing through the overflow weir into the filtration process, impacting the backwash cycle and the service life of the filter media. This reduces the processing load on subsequent filtration devices and ensures effluent quality.

[0009] Optionally, the water outlet flow rate of the guide pipe is not less than the water inlet flow rate of the sedimentation tank.

[0010] In this solution, the outflow rate of the diversion pipe is not less than the inflow rate of the sedimentation tank, so as to avoid the water level in the sedimentation tank continuing to rise due to excessive inflow during the discharge of grease and suspended matter, making it impossible to completely discharge grease and suspended matter.

[0011] Optionally, both ends of the current collecting member are connected to the inner wall of the sedimentation tank, and one end of the flow guide pipe passes through the inner wall of the sedimentation tank and is connected to one end of the current collecting member.

[0012] In order to quickly discharge grease and suspended solids from various locations in the sedimentation tank, the two ends of the collecting piece in this solution are connected to the inner wall of the sedimentation tank to meet the large-scale water inlet demand of the intercepting port.

[0013] Optionally, there are multiple current collecting members, and the multiple current collecting members are equidistantly distributed in the sedimentation tank, and the multiple current collecting members are located at the same height in the sedimentation tank.

[0014] This solution achieves comprehensive and efficient collection of grease and suspended solids at every location within the sedimentation tank by equidistantly distributing multiple flow collectors. Multiple flow collectors positioned at the same height create a unified collection surface, further improving floating solids collection efficiency.

[0015] Optionally, the current collecting member is made of a stainless steel pipe.

[0016] Optionally, the flow guide tube is made of a stainless steel tube and is integrally formed with the flow collecting member.

[0017] In this solution, the current collecting piece and the flow guide pipe are integrally formed with stainless steel pipes, which has a simple structure and is easy to install.

[0018] Optionally, the distance between the port of the intercepting port and the top surface of the overflow weir is 10 cm-20 cm.

[0019] Optionally, one end of the diversion pipe is connected to the sludge tank.

[0020] On the other hand, the present application provides a method, using the sedimentation tank overflow weir outlet front end sewage discharge device, comprising the following steps:

[0021] After the mud is discharged from the bottom of the sedimentation tank, close the mud discharge valve and restore the water supply to the sedimentation tank, so that the grease and suspended solids rise with the water to the interception port and then enter the sewage collection channel;

[0022] Open the drain valve to allow grease and suspended solids to be completely discharged through the diversion pipe;

[0023] Close the drain valve.

[0024] On the other hand, the present application provides a sedimentation tank, including the above-mentioned sedimentation tank overflow weir water outlet front end sewage discharge device.

[0025] Compared with the prior art, the beneficial effects achieved by the present application are as follows: After the sludge is discharged from the bottom of the sedimentation tank, the present application opens the water inlet and drain valve of the sedimentation tank, and the inlet water flows into the sedimentation tank, driving up the grease and suspended matter remaining in the mixing tank, flocculation tank, inlet distribution area, and separation area. Among them, grease and suspended matter will float on the upper layer of the water surface. When the water level rises to the height of the intercepting port, the grease and suspended matter located in the upper layer of the water surface will flow into the sewage collection channel through the intercepting port and be discharged through the diversion pipe. When the grease and suspended matter in the upper layer of the inlet water are completely discharged, the drain valve is closed. As the water flow continues to enter, the water level in the sedimentation tank will rise to the top surface of the overflow weir and flow out through the overflow weir.

[0026] This application can quickly remove grease and suspended solids from the effluent surface of the sedimentation tank overflow weir during the water discharge phase after draining the sedimentation tank and cleaning the filler. This prevents grease and suspended solids from flowing through the overflow weir into the filtration process, affecting the backwash cycle of the filtration process and the service life of the filter media. This reduces the processing load on subsequent filtration devices and ensures the quality of the effluent water. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 It is a schematic structural diagram of some embodiments provided in this application.

[0029] Explanation of reference numerals: 1-overflow weir; 2-filler; 3-flow collecting member; 4-flow guide pipe; 5-drain valve; 6-sedimentation tank; 31-interceptor port. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present disclosure / application, and not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application, its application, or use.

[0031] Example 1

[0032] This embodiment introduces a sedimentation tank overflow weir water outlet front end sewage device, refer to Figure 1 , the sewage discharge device at the front end of the overflow weir of the sedimentation tank in this embodiment includes: a flow collecting part 3 arranged between the top surface of the overflow weir 1 and the top surface of the filler 2. A sewage collecting channel is defined inside the flow collecting part 3, and the flow collecting part 3 is provided with an intercepting port 31 connected to the sewage collecting channel on one side of the top surface of the overflow weir 1. Water can enter the sewage collecting channel through the intercepting port 31, and the height of the intercepting port 31 in the sedimentation tank 6 is lower than the top surface of the overflow weir 1, thereby ensuring that floating objects on the water surface can be collected preferentially when the water level rises. Furthermore, a guide pipe 4 is connected to one end of the flow collecting part 3, and the guide pipe 4 is connected to the sewage collecting channel. A sewage valve 5 is provided on the guide pipe 4. When the sewage valve 5 is opened, the sewage in the sewage collecting channel can be automatically discharged through the guide pipe 4, without the need for an additional water pump for drainage.

[0033] In this embodiment, after the mud is discharged from the bottom of the sedimentation tank 6, the water inlet and the sewage valve 5 of the sedimentation tank are opened, and the inlet water flows into the sedimentation tank, driving the grease and suspended matter remaining in the mixing tank, flocculation tank, water inlet distribution area, and separation area to rise together. Among them, the grease and suspended matter will float on the upper layer of the water surface. When the water level rises to the height of the intercepting port 31, the grease and suspended matter located in the upper layer of the water surface will flow into the sewage collection channel through the intercepting port 31 and be discharged through the diversion pipe 4. When the grease and suspended matter in the upper layer of the water inlet are completely discharged, the sewage valve 5 is closed. As the water flow continues to enter, the water level in the sedimentation tank will rise to the top surface of the overflow weir 1 and flow out through the overflow weir 1.

[0034] This embodiment can quickly remove grease and suspended matter from the effluent surface of the sedimentation tank overflow weir during the water inlet and outlet phases after draining the sedimentation tank and cleaning the filler 2. This prevents grease and suspended matter from flowing through the overflow weir 1 into the filtration process, thereby affecting the backwash cycle of the filtration process and the service life of the filter media. This reduces the processing load on subsequent filtration devices and ensures the quality of the effluent water.

[0035] To prevent the water level in the sedimentation tank from continuing to rise due to excessive inflow during the discharge of grease and suspended solids, thereby preventing the grease and suspended solids from being completely discharged, in this embodiment, the outflow of the flow guide pipe 4 is not less than the inflow of the sedimentation tank.

[0036] Example 2:

[0037] Based on the same inventive concept as the first embodiment, refer to Figure 1 To quickly drain grease and suspended solids from all locations within the sedimentation tank, the ends of the flow collector 3 in this embodiment are connected to the inner wall of the sedimentation tank, meeting the wide-area water inlet requirements of the interceptor 31. One end of the flow guide pipe 4 passes through the inner wall of the sedimentation tank and connects to one end of the flow collector 3, forming a drainage channel to ensure the smooth discharge of sewage, grease, and suspended solids.

[0038] In this embodiment, multiple current collecting members 3 are evenly spaced and located at the same height within the sedimentation tank. This equidistant distribution of the multiple current collecting members 3 enables comprehensive and efficient collection of grease and suspended solids at all locations within the sedimentation tank. The multiple current collecting members 3 located at the same height form a unified collection surface, further improving the efficiency of floating solids collection.

[0039] In this embodiment, the flow collecting member 3 and the flow guide tube 4 are made of a stainless steel pipe with a diameter of 150 mm and are integrally formed. A 5 cm wide intercepting opening 31 is provided on the stainless steel pipe, and the distance between the end of the intercepting opening 31 and the top surface of the overflow weir 1 is 15 cm.

[0040] Furthermore, one end of the guide pipe 4 is connected to the sludge pool, so that grease and suspended matter can be discharged into the sludge pool.

[0041] Example 3:

[0042] The sedimentation tank generally needs to be drained from the bottom after running for 8-12 hours. During the drainage process, the water inlet and outlet of the sedimentation tank are closed, and the sludge discharge valve is opened. When the sludge discharge is completed, the sludge discharge valve needs to be closed and the water inlet of the sedimentation tank needs to be opened. During the period from closing the bottom sludge discharge valve and resuming the water inlet to the outlet stage, the incoming water will drive the grease and suspended matter remaining in the mixing tank, flocculation tank, water inlet distribution area, and separation area to rise to the outlet weir, resulting in a large amount of grease and suspended matter in the early outlet water after sludge discharge. This embodiment introduces a method that uses the sewage discharge front-end device of the sedimentation tank overflow weir in Example 1 or Example 2 to solve the above problem. The method comprises the following steps:

[0043] After the mud is discharged from the bottom of the sedimentation tank, the mud discharge valve is closed and the water inlet to the sedimentation tank is restored, so that the grease and suspended solids rise with the inlet water to the intercepting port 31 and then enter the sewage collection channel.

[0044] Open the drain valve 5 to allow grease and suspended solids to be completely discharged through the diversion pipe 4;

[0045] Close the drain valve 5. As water continues to flow in, the water level in the sedimentation tank will rise to the top surface of the overflow weir 1 and flow out through the overflow weir 1, restoring normal water discharge.

[0046] Example 4

[0047] This embodiment introduces a sedimentation tank, including the sedimentation tank overflow weir outlet front-end sewage discharge device in embodiment one or embodiment two.

[0048] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present disclosure / application. These improvements and modifications should also be regarded as the scope of protection of the present disclosure / application.

Claims

1. A sewage discharge device at the front end of the overflow weir of a sedimentation tank, characterized in that: The invention comprises a flow collecting member (3) arranged between the top surface of the overflow weir (1) and the top surface of the filler (2), wherein a sewage collecting channel is defined inside the flow collecting member (3), and the flow collecting member (3) is provided with a cut-off opening (31) connected to the sewage collecting channel on one side of the top surface of the overflow weir (1), and one end of the flow collecting member (3) is connected to a guide pipe (4), wherein the guide pipe (4) is connected to the sewage collecting channel, and a sewage discharge valve (5) is provided on the guide pipe (4), and when the sewage discharge valve (5) is opened, sewage in the sewage collecting channel can be discharged through the guide pipe (4).

2. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 1, characterized in that: The water outflow rate of the guide pipe (4) is not less than the water inflow rate of the sedimentation tank (6).

3. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 1, characterized in that: Both ends of the current collecting member (3) are connected to the inner wall of the sedimentation tank (6), and one end of the flow guide pipe (4) passes through the inner wall of the sedimentation tank (6) and is connected to one end of the current collecting member (3).

4. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 3, characterized in that: The current collecting member (3) is made of a stainless steel pipe.

5. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 4, characterized in that: The flow guide tube (4) is made of a stainless steel tube and is integrally formed with the flow collecting member (3).

6. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 1, characterized in that: There are a plurality of the current collecting members (3), the plurality of the current collecting members (3) are distributed in the sedimentation tank (6) at equal intervals, and the plurality of the current collecting members (3) are located at the same height in the sedimentation tank (6).

7. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 1, characterized in that: The distance between the port of the intercepting port (31) and the top surface of the overflow weir (1) is 10 cm to 20 cm.

8. The sedimentation tank overflow weir outlet front end sewage discharge device according to claim 1, characterized in that: One end of the diversion pipe (4) is connected to the sludge tank.

9. A method, using the sedimentation tank overflow weir outlet front end sewage discharge device according to any one of claims 1 to 8, characterized in that: The steps include: After the mud is discharged from the bottom of the sedimentation tank (6), the mud discharge valve is closed and the water inlet to the sedimentation tank (6) is restored, so that the grease and suspended solids rise with the inlet water to the intercepting port (31) and then enter the sewage collection channel; Open the drain valve (5) to allow the grease and suspended solids to be completely discharged through the guide pipe (4); Close the drain valve (5).

10. A sedimentation tank, characterized in that: It comprises the sewage discharge device at the front end of the overflow weir of the sedimentation tank as described in any one of claims 1 to 8.

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