Improved UASB (Upflow Anaerobic Sludge Blanket) up-flow anaerobic reactor

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to an improved UASB (Upflow Anaerobic Sludge Blanket) upflow anaerobic reactor which comprises a tank body, a water distribution unit is arranged at the bottom of the tank body, and the water distribution unit comprises a water distributor arranged in the middle and a plurality of water distribution pipes arranged around the water distributor; the plurality of water distribution pipes are uniformly arranged along the circumferential direction of the water distribution distributor; a separation unit is arranged in the middle of the tank body, the separation unit comprises a first separation layer and a second separation layer, and the first separation layer and the second separation layer are vertically arranged in a spaced mode to achieve multiple times of separation; an overflow weir is arranged at the top of the tank body, the overflow weir is communicated with a buffer water tank arranged on the outer side of the tank body, and the buffer water tank is used for containing supernate flowing out of the overflow weir. The device not only can more effectively collect biogas generated from the reaction chamber at the lower part, but also can better precipitate suspended matters at the upper part of the separator, and realizes effective backflow of sludge.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, specifically, relate to an improved UASB upflow anaerobic reactor. BACKGROUND

[0002] In the present life, the discharge of sewage is increasing, if not properly handled, will lead to a series of problems such as water environment and residents' health. UASB anaerobic reactor as a typical representative of anaerobic reactor, has been applied in various organic wastewater treatment, and has shown good treatment effect. However, the traditional UASB reactor still has some deficiencies in practical application, such as the three-phase separation effect is not ideal, the water distribution is uneven, the sludge mixing effect is poor and the sludge retention is insufficient, etc. The overall treatment effect and operation stability are affected. Therefore, it is necessary to improve the existing system to improve its treatment performance and operation efficiency. SUMMARY

[0003] The utility model aims at solving the prior art's insufficient, provide a kind of UASB upflow anaerobic reactor that can stably and efficiently operate.

[0004] To achieve the above object, the utility model provides an improved UASB upflow anaerobic reactor, including tank body, the tank body bottom is equipped with water distribution unit, the water distribution unit includes one water distribution distributor arranged in middle portion and several water distribution pipes arranged around the water distribution distributor, several water distribution pipes are evenly arranged along the circumferential direction of the water distribution distributor;

[0005] The middle part of the tank body is provided with a separation unit, the separation unit includes a first separation layer and a second separation layer, the first separation layer and the second separation layer are vertically spaced apart, and multiple separation is realized.

[0006] The top of the tank body is provided with an overflow weir, the overflow weir is communicated with a buffer tank arranged outside the tank body, and the buffer tank is used for containing supernatant flowing out from the overflow weir.

[0007] Preferably, the bottom of the side wall of the tank body is provided with a water inlet, and the water inlet is communicated with the water distribution distributor through a pipeline.

[0008] Preferably, it further includes a baffle, the baffle is arranged inside the tank body, and is located between the water distribution unit and the separation unit.

[0009] Preferably, the first separation layer and the second separation layer each include a plurality of three-phase separators, and the three-phase separators are horizontally arranged inside the tank body.

[0010] Preferably, a gas collecting chamber is arranged between the separation unit and the overflow weir, and an exhaust pipe is arranged inside the gas collecting chamber and extends upward in the vertical direction to the outside of the top of the tank body.

[0011] Preferably, the bottom of the buffer water tank is higher than the baffle plate, and the bottom of the buffer water tank is provided with an opening and is communicated with the bottom of the tank body through a backflow pipe, and a valve is arranged in the middle of the backflow pipe to control the opening and closing of the backflow pipe.

[0012] Preferably, one side wall of the buffer water tank is provided with a water outlet pipe, and the liquid in the buffer water tank is discharged through the water outlet pipe to the water outlet.

[0013] Preferably, the water outlet pipe is further provided with a backwater branch, the other end of the backwater branch is communicated with the bottom of the tank body, and part of the liquid is discharged through a plurality of pressurized nozzles, a backflow pump is arranged in the middle of the backwater branch, a plurality of pressurized nozzles are arranged at the bottom of the water distribution pipe, and the number of the pressurized nozzles is the same as the number of the water distribution pipes.

[0014] Compared with the prior art, the technical scheme has the following beneficial effects: the traditional single-layer three-phase separator is improved to a multi-layer structure. The multi-layer design not only can more effectively collect biogas generated from the lower reaction chamber, but also can better precipitate and separate suspended solids in the upper part of the separator, and realize effective backflow of sludge. This structural improvement significantly improves the efficiency of three-phase separation, and ensures effective separation of biogas, supernatant and sludge. The dispersion water distribution mode is adopted, and water is uniformly distributed through a plurality of water distribution points. This improvement ensures that wastewater can uniformly enter the inside of the reactor, avoids the problem of too high or too low local concentration, and improves the reaction efficiency and uniformity of wastewater treatment. The auxiliary backflow pump is arranged in the reactor, part of the treated wastewater is backflowed to the bottom of the reactor through the backflow pump, and the sludge around the tank body is stirred through the pressurized nozzles, so that the accumulation of sludge is effectively prevented. In addition, the backflow of part of the treated water can also increase the upward flow rate of the water flow in the tank body, and further promote the full contact and reaction of wastewater and sludge. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0016] Figure 1 is a whole structure diagram of the present application;

[0017] Figure 2 is a water distribution unit structure diagram of the present application;

[0018] In the figure: 1. water inlet, 2. water distribution distributor, 3. water distribution pipe, 4. pressurized nozzle, 5. baffle, 6. first separation layer, 7. second separation layer, 8. gas collection chamber, 9. overflow weir, 10. exhaust pipe, 11. buffer tank, 12. backflow pump, 13. backflow pipe, 14. valve, 15. water outlet, 16. water outlet pipe, 17. backwater branch. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described and discussed with reference to the drawings of the present application. Obviously, only some examples of the present application are described here, and not all examples. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component. When a component is referred to as being "disposed" on another component, it can be directly disposed on the other component or there can be an intervening component. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] Referring to Figure 1 and Figure 2The embodiment provides an improved UASB upflow anaerobic reactor, which comprises a tank body, a water distribution unit arranged at the bottom of the tank body, the water distribution unit comprising a water distribution distributor arranged at the middle part and a plurality of water distribution pipes arranged around the water distribution distributor, the plurality of water distribution pipes being uniformly arranged along the circumferential direction of the water distribution distributor; a separation unit arranged at the middle part of the tank body, the separation unit comprising a first separation layer and a second separation layer, the first separation layer and the second separation layer being vertically spaced apart to realize multiple separation; an overflow weir arranged at the top of the tank body, the overflow weir being in communication with a buffer water tank arranged outside the tank body, the buffer water tank being used for containing supernatant flowing out of the overflow weir. A water inlet is arranged at the bottom of the side wall of the tank body, and the water inlet is in communication with the water distribution distributor through a pipeline. A baffle plate is further arranged inside the tank body and located between the water distribution unit and the separation unit. The first separation layer and the second separation layer each comprise a plurality of three-phase separators, and the three-phase separators are horizontally arranged inside the tank body. A gas collection chamber is further arranged between the separation unit and the overflow weir, and an exhaust pipe is further arranged inside the gas collection chamber, the exhaust pipe extending upward in the vertical direction until the outside of the top of the tank body. The bottom of the buffer water tank is higher than the baffle plate, and the bottom of the buffer water tank is provided with an opening and is in communication with the bottom of the tank body through a backflow pipe, the middle part of the backflow pipe is provided with a valve, and the valve is used for controlling the opening and closing of the backflow pipe. One side wall of the buffer water tank is provided with a water outlet pipe, and the liquid in the buffer water tank is discharged through the water outlet pipe to a water outlet. The water outlet pipe is further provided with a backwater branch, the other end of the backwater branch is in communication with the bottom of the tank body, and part of the liquid is discharged through a plurality of pressurized nozzles, the middle part of the backwater branch is provided with a backflow pump, the plurality of pressurized nozzles are arranged at the bottom of the water distribution pipe, and the number of the pressurized nozzles is the same as that of the water distribution pipes.

[0023] Specifically, in use, wastewater enters the water distribution distributor through the water inlet, and then enters the UASB tank uniformly through the water distribution pipes. In the process of rising, the wastewater preliminarily intercepts the activated sludge through the baffle plate to prevent too much sludge from entering the three-phase separator. The wastewater passes through the three-phase separator, the biogas enters the gas collection chamber, and is discharged through the exhaust pipe. The supernatant flows into the buffer water tank through the overflow weir, and finally flows out through the water outlet. Part of the overflowed anaerobic sludge flows into the anaerobic tank through the backflow pipe, and the opening and closing of the backflow pipe is realized through the valve. Part of the treated effluent is pressurized by the backflow pump and then flows into the pressurized nozzle to realize the function of stirring the sludge at the bottom and prevent the sludge around the tank body from accumulating.

[0024] The traditional single-layer three-phase separator is improved to a multi-layer structure. The multi-layer design not only more effectively collects biogas generated from the lower reaction chamber, but also better precipitates and separates suspended solids in the upper part of the separator, and achieves effective backflow of sludge. This structural improvement significantly improves the efficiency of three-phase separation, ensuring effective separation of biogas, supernatant and sludge.

[0025] The dispersion water distribution method is adopted, and water is uniformly distributed through multiple water distribution points. This improvement ensures that wastewater can be uniformly distributed into the reactor, avoiding the problem of local over-concentration or under-concentration, and improving the reaction efficiency and uniformity of wastewater treatment.

[0026] An auxiliary backflow pump is added to the reactor, which backflows part of the treated wastewater to the bottom of the reactor and agitates the sludge around the tank through a pressurized nozzle, effectively preventing sludge accumulation. In addition, backflowing part of the treated water also increases the upward flow rate of the water flow inside the tank, further promoting the full contact and reaction of wastewater and sludge.

[0027] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and one or more of the above embodiments can be combined to form a combined embodiment. Those skilled in the art can make various changes or modifications or combinations within the scope of the claims, which does not affect the essential content of the present application. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily.

Claims

1. An improved UASB upflow anaerobic reactor comprising a tank body, characterized in that, The bottom of the tank body is provided with a water distribution unit, which comprises a water distribution distributor arranged in the middle and a plurality of water distribution pipes arranged around the water distribution distributor, the plurality of water distribution pipes being uniformly arranged along the circumferential direction of the water distribution distributor; The middle of the tank body is provided with a separation unit, which comprises a first separation layer and a second separation layer, the first separation layer and the second separation layer being vertically spaced apart to realize multiple separation; The top of the tank body is provided with an overflow weir, the overflow weir being in communication with a buffer water tank arranged outside the tank body, the buffer water tank being used for containing supernatant flowing out of the overflow weir.

2. The improved UASB upflow anaerobic reactor according to claim 1, wherein, The bottom of the side wall of the tank body is provided with a water inlet, the water inlet being in communication with the water distribution distributor through a pipeline.

3. The improved UASB upflow anaerobic reactor according to claim 2, wherein, Further comprising a baffle, the baffle being arranged inside the tank body and located between the water distribution unit and the separation unit.

4. The improved UASB upflow anaerobic reactor according to claim 3, wherein, The first separation layer and the second separation layer each comprise a plurality of three-phase separators, the three-phase separators being horizontally arranged inside the tank body.

5. The improved UASB upflow anaerobic reactor according to claim 4, wherein, Further comprising a gas collecting chamber, the gas collecting chamber being arranged between the separation unit and the overflow weir, and the gas collecting chamber being further provided with an exhaust pipe inside, the exhaust pipe extending upward in the vertical direction until the top outside of the tank body.

6. The improved UASB upflow anaerobic reactor according to claim 5, wherein, The bottom of the buffer water tank is higher than the baffle, and the bottom of the buffer water tank is provided with an opening and is in communication with the bottom of the tank body through a backflow pipe, the middle of the backflow pipe being provided with a valve, the valve being used for controlling the opening and closing of the backflow pipe.

7. The improved UASB upflow anaerobic reactor according to claim 6, wherein, One side wall of the buffer water tank is provided with a water outlet pipe, liquid in the buffer water tank being discharged through the water outlet pipe to a water outlet.

8. The improved UASB upflow anaerobic reactor according to claim 7, wherein, The water outlet pipe is further provided with a backwater branch, the other end of the backwater branch being in communication with the bottom of the tank body, and part of the liquid being discharged through a plurality of pressurized nozzles, the middle of the backwater branch being provided with a backflow pump, a plurality of pressurized nozzles being arranged at the bottom of the water distribution pipe, and the number of the pressurized nozzles being the same as the number of the water distribution pipes.

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