Biochemical tank sampling and sedimentation integrated device, biochemical tank and sewage treatment system

Abstract

This disclosure provides an integrated sampling and sedimentation device for a biological treatment tank, a biological treatment tank, and a wastewater treatment system. The integrated sampling and sedimentation device includes a main pipeline and a valve system. The main pipeline includes a main pipe, an inlet pipe, a drain pipe, an outlet pipe, and an air inlet pipe. The inlet pipe and the drain pipe are connected to the lower end of the main pipe. The outlet pipe is connected to the upper end of the main pipe and is at least partially placed inside the main pipe. The air inlet pipe is connected to the upper end of the main pipe. The lower ends of the main pipe and the outlet pipe are below the surface of the sludge mixture, while the upper end of the main pipe is above the surface of the sludge mixture. The valve system includes an outlet valve, an air inlet valve, and a drain valve. The outlet valve is located on the outlet pipe, the air inlet valve is located on the air inlet pipe, and the drain valve is located on the drain valve. With this solution, when extracting the supernatant, the air inlet pipe pressurizes the main pipeline, and the outlet pipe discharges the supernatant, thus avoiding disturbance of the bottom sludge layer and reducing the risk of contamination.

Description

Technical Field

[0001] This disclosure relates to the field of wastewater treatment technology, and in particular to an integrated device for sampling and sedimentation in a biochemical tank, a biochemical tank, and a wastewater treatment system. Background Technology

[0002] In wastewater treatment technology, the activated sludge process is a core technology. The solid-liquid separation effect of the sludge mixture in the biological treatment tank directly affects the effluent quality. Before effluent discharge, the supernatant needs to be tested, and after testing, it needs to be extracted. In existing technologies, both supernatant sampling and extraction after sedimentation occur in open environments. Extraction after sedimentation typically uses top overflow or bottom suction, which easily contaminates the supernatant and affects the wastewater treatment effect. With the development of the wastewater treatment industry, the requirements for improving the quality and efficiency of wastewater treatment plants are becoming increasingly stringent, and existing technologies are struggling to meet these high demands. Summary of the Invention

[0003] In view of this, the present disclosure provides an integrated sampling and sedimentation device for a biological treatment tank, a biological treatment tank, and a wastewater treatment system, which at least partially solves the problems existing in the prior art.

[0004] The first aspect of this disclosure provides an integrated sampling and sedimentation device for a biological treatment tank, including a main pipeline and a valve system. The main pipeline includes a main pipe, an inlet pipe, a drain pipe, an outlet pipe, and an air inlet pipe. The inlet pipe and the drain pipe are both connected to the lower end of the main pipe. The outlet pipe is connected to the upper end of the main pipe and is at least partially placed inside the main pipe. The air inlet pipe is connected to the upper end of the main pipe. The lower ends of the main pipe and the lower ends of the outlet pipe are located below the surface of the sludge mixture, while the upper end of the main pipe is located above the surface of the sludge mixture. The valve system includes an outlet valve, an air inlet valve, and a drain valve. The outlet valve is located on the outlet pipe, the air inlet valve is located on the air inlet pipe, and the drain valve is located on the drain valve.

[0005] According to a specific implementation of the first aspect of this disclosure, the main pipeline includes a main body and a tee connector, the tee connector being connected to the lower end of the main body, an inlet pipe and a drain pipe respectively.

[0006] According to a specific implementation of the first aspect of this disclosure, the main body includes an upper cover, a middle pipe and a bottom connecting pipe connected in sequence. The upper cover has a first mounting hole and a second mounting hole. The water outlet pipe extends into the main pipe through the first mounting hole, the air inlet pipe is connected to the second mounting hole, and the bottom connecting pipe is connected to a tee connector.

[0007] According to a specific implementation of the first aspect of this disclosure, the upper diameter of the bottom connecting pipe is larger than the lower diameter of the bottom connecting pipe.

[0008] According to a specific implementation of the first aspect of this disclosure, the portion of the water outlet pipe located inside the intermediate pipe is L1, the length of the intermediate pipe is L2, and the range of L1 / L2 is 0.28 to 0.38.

[0009] According to a specific implementation of the first aspect of this disclosure, the integrated sampling and sedimentation device for the biochemical tank further includes a liquid level sensor disposed in the main pipeline, which is used to detect the liquid level height in the main pipeline.

[0010] According to a specific implementation of the first aspect of this disclosure, the integrated biological tank sampling and sedimentation device further includes a control system, which is used to control the opening and closing of the outlet valve, the air inlet valve and the sewage discharge valve based on the liquid level height detected by the liquid level sensor.

[0011] A second aspect of this disclosure provides a biochemical tank, including any of the integrated sampling and sedimentation devices for biochemical tanks described in the first aspect.

[0012] A third aspect of this disclosure provides a wastewater treatment system, including the biochemical tank described in the second aspect above.

[0013] The integrated sampling and sedimentation device for a biochemical tank provided in this embodiment includes a main pipeline and a valve system. The main pipeline includes a main pipe, an inlet pipe, a drain pipe, an outlet pipe, and an air inlet pipe. The inlet pipe and the drain pipe are both connected to the lower end of the main pipe. The outlet pipe is connected to the upper end of the main pipe, and at least part of the outlet pipe is placed inside the main pipe. The air inlet pipe is connected to the upper end of the main pipe. The valve system includes an outlet valve, an air inlet valve, and a drain valve. The outlet valve is located on the outlet pipe, the air inlet valve is located on the air inlet pipe, and the drain valve is located on the drain valve. When installing the integrated sampling and sedimentation device for the biological treatment tank, the lower end of the main pipe is placed below the surface of the sludge mixture, and the upper end of the main pipe is placed above the surface of the sludge mixture. Open the outlet valve to balance the pressure inside and outside the main pipe. The sludge mixture flows into the main pipe through the inlet pipe. After the liquid level in the main pipe reaches the first height, close all valves and let it stand for a period of time until the sludge settles. Then, open the air inlet valve and the outlet valve. Gas enters the main pipe through the air inlet pipe, increasing the pressure inside the main pipe. The supernatant flows out from the outlet pipe. After the supernatant flows out, the liquid level drops to the second height. Then, close the outlet valve and open the drain valve. Continue to input gas through the air inlet pipe to pressurize the system, causing the sludge to be discharged from the drain pipe. The liquid level continues to drop. When the liquid level drops to the third height, close the drain valve and the air inlet valve, open the outlet valve, and repeat the above steps. The integrated sampling and sedimentation device for biochemical tanks provided in this embodiment of the invention pressurizes the main pipe through the air inlet pipe and discharges the supernatant through the water outlet pipe when extracting the supernatant. Compared with traditional top overflow or bottom suction, this device can avoid disturbing the bottom sludge layer and reduce the risk of pollution. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a biochemical pool sampling and sedimentation integrated device provided in the first aspect of this disclosure.

[0016] The accompanying drawings may not be drawn to scale.

[0017] Explanation of reference numerals in the attached figures:

[0018] 10. Integrated sampling and sedimentation device for biological treatment tank; 1. Main pipe; 11. Main body; 12. T-joint; 111. Top cover; 112. Intermediate pipe; 113. Bottom connecting pipe; 2. Liquid inlet pipe; 3. Sewage outlet pipe; 4. Water outlet pipe; 5. Air inlet pipe; 6. Water outlet valve; 7. Air inlet valve; 8. Sewage outlet valve; 9. Liquid level sensor. Detailed Implementation

[0019] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0020] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0021] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0022] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0024] In wastewater treatment technology, the activated sludge process is a core technology. The solid-liquid separation effect of the sludge mixture in the biological treatment tank directly affects the effluent quality. Before effluent discharge, the supernatant needs to be tested, and after testing, it needs to be extracted. In existing technologies, both supernatant sampling and extraction after sedimentation occur in open environments. Extraction after sedimentation typically uses top overflow or bottom suction, which easily contaminates the supernatant and affects the wastewater treatment effect. With the development of the wastewater treatment industry, the requirements for improving the quality and efficiency of wastewater treatment plants are becoming increasingly stringent, and existing technologies are struggling to meet these high demands.

[0025] To address the aforementioned problems, this disclosure provides an integrated biochemical tank sampling and sedimentation device, a biochemical tank, and a wastewater treatment system. The integrated biochemical tank sampling and sedimentation device of this disclosure will be described below with reference to the accompanying drawings.

[0026] Please refer to Figure 1The first aspect of this disclosure provides a biochemical tank sampling and sedimentation integrated device 10, including a main pipeline and a valve system. The main pipeline includes a main pipeline 1, an inlet pipe 2, a drain pipe 3, an outlet pipe 4, and an air inlet pipe 5. The inlet pipe 2 and the drain pipe 3 are both connected to the lower end of the main pipeline 1. The outlet pipe 4 is connected to the upper end of the main pipeline 1 and is at least partially placed inside the main pipeline 1. The air inlet pipe 5 is connected to the upper end of the main pipeline 1. The valve system includes an outlet valve 6, an air inlet valve 7, and a drain valve 8. The outlet valve 6 is disposed on the outlet pipe 4, the air inlet valve 7 is disposed on the air inlet pipe 5, and the drain valve 8 is disposed on the drain valve 8.

[0027] The entire device is approximately 1.6 meters high, and the main pipe 1 is approximately 1.3 meters high. The main pipe is made of UPVC material, which is corrosion-resistant and has good sealing properties. Optionally, the entire device is placed inside the biological treatment tank, with the top 100mm above the surface of the sludge mixture and the bottom 1000mm below the surface of the sludge mixture, thus ensuring that the sludge mixture can flow naturally from the inlet pipe 2 into the main pipe 1.

[0028] When installing the integrated sampling and sedimentation device 10 for the biological treatment tank, the lower end of the main pipe 1 is placed below the surface of the sludge mixture, and the upper end of the main pipe 1 is placed above the surface of the sludge mixture. The outlet valve 6 is opened to balance the pressure inside and outside the main pipe. The sludge mixture flows into the main pipe 1 through the inlet pipe 2. After the liquid level in the main pipe 1 reaches the first height, all valves are closed and the mixture is allowed to stand for a period of time until the sludge settles. Then, the air inlet valve 7 and the outlet valve 6 are opened. Gas enters the main pipe 1 through the air inlet pipe 5, increasing the pressure inside the main pipe 1. The supernatant flows out from the outlet pipe 4. After the supernatant flows out, the liquid level drops to the second height. Then, the outlet valve 6 is closed and the drain valve 8 is opened. Gas continues to be input through the air inlet pipe 5 to pressurize the system, causing the sludge to be discharged from the drain pipe 3. The liquid level continues to drop. When the liquid level drops to the third height, the drain valve 8 and the air inlet valve 7 are closed, and the outlet valve 6 is opened. The above steps are repeated. The integrated sampling and sedimentation device 10 for biological treatment tanks provided in this embodiment of the invention extracts the supernatant by pressurizing the main pipe 1 through the air inlet pipe 5 and discharging the supernatant through the water outlet pipe 4. Compared with traditional top overflow or bottom suction, this avoids disturbing the bottom sludge layer and reduces the risk of pollution. Furthermore, no flocculants or demulsifiers are added throughout the process; solid-liquid separation is achieved solely through settling and pressure difference, thereby eliminating Al... 3 +, Fe 3+ This significantly reduces interference with spectral detection and improves sludge activity retention, preventing imbalances in the biological system. The settling time can be adjusted based on actual conditions; specifically, it can be dynamically adjusted according to the SVI (Sludge Volume Index) value. For example, 5 minutes are set when SVI = 150 mL / g, and 8 minutes are set when SVI > 200 mL / g.

[0029] In some optional embodiments, the main pipe 1 includes a main body 11 and a tee connector 12, which is connected to the lower end of the main body 11, the inlet pipe 2, and the drain pipe 3, respectively. The tee connector 12 facilitates the connection of the inlet pipe 2 and the drain pipe 3 to the main pipe 1. Optionally, the main body 11 includes an upper cover 111, an intermediate pipe 112, and a bottom connecting pipe 113 connected in sequence. The upper cover 111 has a first mounting hole and a second mounting hole. The water outlet pipe 4 extends into the main pipe 1 through the first mounting hole, the air inlet pipe 5 communicates with the second mounting hole, and the bottom connecting pipe 113 communicates with the tee connector 12. The upper cover 111, the intermediate pipe 112, and the bottom connecting pipe 113 can be manufactured separately and then installed. Optionally, the upper diameter of the bottom connecting pipe 113 is larger than its lower diameter.

[0030] In some optional embodiments, the portion of the outlet pipe 4 located within the intermediate pipe 112 is L1, and the length of the intermediate pipe 112 is L2. The ratio of L1 to L2 ranges from 0.28 to 0.38, ensuring that the lower end of the outlet pipe 4 is located above the interface between the settled sludge layer and the supernatant. This ensures that only the supernatant flows out of the outlet pipe 4 during pressurization, avoiding disturbance to the bottom sludge layer and reducing the risk of contamination. Preferably, L1 / L2 is 1 / 3.

[0031] In some optional embodiments, the integrated biological tank sampling and sedimentation device 10 further includes a liquid level sensor 9, which is installed inside the main pipeline 1. The liquid level sensor 9 is used to detect the liquid level height inside the main pipeline 1. Optionally, the integrated biological tank sampling and sedimentation device 10 also includes a control system, which is used to control the opening and closing of the outlet valve 6, the air inlet valve 7, and the sewage discharge valve 8 based on the liquid level height detected by the liquid level sensor 9.

[0032] Specifically, the level sensor 9 can detect high and low level signals. When a low level signal is detected, the control system opens the outlet valve 6, allowing the sludge mixture to flow in. When the level sensor 9 detects a high level signal and transmits it to the control system, the control system closes all valves. After a period of settling, the control system opens the air inlet valve 7 and the outlet valve 6. When the level sensor 9 detects the loss of the high level signal, it closes the outlet valve 6 and opens the drain valve 8. When the level sensor 9 detects a low level signal, it closes the air inlet valve 7 and opens the outlet valve 6, thus repeating the above steps. Through the level sensor 9 and the control system, the level of automation is improved, enabling unattended adaptive operation.

[0033] A second aspect of this disclosure provides a biochemical tank, including the integrated sampling and sedimentation device 10 of any of the biochemical tanks described in the first aspect.

[0034] A third aspect of this disclosure provides a wastewater treatment system, including the biochemical tank described in the second aspect above.

[0035] The biological treatment tank provided in the second aspect embodiment and the wastewater treatment system provided in the third aspect embodiment of this disclosure directly or indirectly include the integrated biological treatment tank sampling and sedimentation device 10 provided in the first aspect embodiment, and have all the beneficial effects of the integrated biological treatment tank sampling and sedimentation device 10 in the first aspect embodiment. To avoid repetition, it will not be described again here.

[0036] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A biochemical tank sampling and sedimentation integrated device, characterized in that, include: The main pipeline includes a main pipeline, an inlet pipe, a drain pipe, a water outlet pipe, and an air inlet pipe. The inlet pipe and the drain pipe are both connected to the lower end of the main pipeline. The water outlet pipe is connected to the upper end of the main pipeline and is at least partially placed inside the main pipeline. The air inlet pipe is connected to the upper end of the main pipeline. The lower ends of the main pipeline and the lower ends of the inlet pipe are located below the surface of the sludge mixture, and the upper end of the main pipeline is located above the surface of the sludge mixture. The valve system includes a water outlet valve, an air inlet valve, and a drain valve. The water outlet valve is installed on the water outlet pipe, the air inlet valve is installed on the air inlet pipe, and the drain valve is installed on the drain valve.

2. The biochemical tank sampling and settling integrated device according to claim 1, characterized in that, The main pipeline includes a main body and a tee connector, which is connected to the lower end of the main body, the inlet pipe and the drain pipe respectively.

3. The biochemical tank sampling and sedimentation integrated device according to claim 2, characterized in that, The main body includes an upper cover, a middle pipe and a bottom connecting pipe connected in sequence. The upper cover has a first mounting hole and a second mounting hole. The water outlet pipe extends into the main pipe through the first mounting hole. The air inlet pipe is connected to the second mounting hole. The bottom connecting pipe is connected to the tee connector.

4. The biochemical tank sampling and settling integrated device according to claim 3, characterized in that, The upper diameter of the bottom connecting pipe is larger than the lower diameter of the bottom connecting pipe.

5. The biochemical tank sampling and settling integrated device according to claim 3, characterized in that, The portion of the water outlet pipe located inside the intermediate pipe is L1, the length of the intermediate pipe is L2, and the ratio of L1 / L2 is 0.28 to 0.

38.

6. The integrated biochemical tank sampling and settling device of claim 1, wherein, It also includes a liquid level sensor, which is installed inside the main pipeline and is used to detect the liquid level height inside the main pipeline.

7. The biochemical tank sampling and settling integrated device according to claim 6, characterized in that, It also includes a control system, which controls the opening and closing of the water outlet valve, the air inlet valve and the sewage discharge valve based on the liquid level height detected by the liquid level sensor.

8. A biochemical cell characterized in that, It includes the integrated biochemical pool sampling and sedimentation device as described in any one of claims 1 to 7.

9. A sewage treatment system characterised in that, Includes the biochemical pool as described in claim 8.

Images