UASB (Upflow Anaerobic Sludge Blanket) anaerobic bioreactor for high-concentration wastewater

Abstract

The utility model relates to a UASB (Upflow Anaerobic Sludge Blanket) anaerobic bioreactor for high-concentration wastewater, which is applied to the technical field of wastewater treatment. The UASB anaerobic bioreactor comprises a biological reaction box and a wastewater box connected with the biological reaction box through a pipeline, the biological reaction box comprises a reaction box body, a three-phase separator fixed at the top of the reaction box body and a waste liquid adding device fixed at the bottom of the reaction box body, the waste liquid adding device is connected with a pulverizator through a pipeline, and the other end of the pulverizator is connected with a waste water box through a pipeline; the waste liquid adding device comprises a waste liquid conveying pipe, a plurality of waste liquid nozzles connected to the waste liquid conveying pipe and blocking pieces arranged at the output ends of the waste liquid nozzles. The blocking pieces are rotationally connected with the waste liquid nozzles through fixing rods. The waste water outlet is inverted, and the cleaning device driven by water flow is additionally arranged at the position of the waste water outlet, so that sludge around the water outlet is cleaned in a water flow and physical mode, and the waste water outlet is not prone to being blocked by the sludge.

Description

Technical Field

[0001] This utility model relates to a bioreactor, and more particularly to a UASB anaerobic bioreactor for high-concentration wastewater, applied in the field of wastewater treatment technology. Background Technology

[0002] Wastewater is generated in both domestic and industrial processes, making wastewater treatment an unavoidable issue. UASB anaerobic bioreactors are commonly used for wastewater treatment in industries such as papermaking, brewing, oil and fat processing, slaughtering, and seafood processing due to their high COD removal rate, low operating costs, and small investment.

[0003] Patent CN213012184U discloses a UASB (Ultra-Anaerobic Swab) wastewater reactor, comprising a reaction tank with a biogas collection port and a wastewater outlet at the top. Above the reaction tank is a pulse distributor, and inside the tank, from top to bottom, are a three-phase separator, a suspended zone, a sludge zone, and a water distribution system. The pulse distributor is connected to the water distribution system. A water pump is connected to the lower end of the reaction tank, and the pump's inlet is connected to the lower end of the three-phase separator. The pump, the water distribution system, and the area below the three-phase separator form an internal wastewater circulation system. A wastewater inlet is located at the top of the pulse distributor. This patent reduces short-circuiting by optimizing the water distribution system structure and wastewater circulation; however, it still suffers from the common drawback of clogged wastewater outlets found in most UASB wastewater anaerobic reactors.

[0004] To address the issue of potential blockage at the wastewater outlet in the aforementioned UASB anaerobic reactors for wastewater, this solution proposes a UASB anaerobic bioreactor for high-concentration wastewater. Utility Model Content

[0005] The technical problem that this utility model aims to solve in view of the above-mentioned prior art is that the wastewater outlet of a general UASB anaerobic reactor for wastewater may be blocked.

[0006] To address the aforementioned problems, this utility model provides a UASB anaerobic bioreactor for high-concentration wastewater, comprising a bioreactor tank and a wastewater tank connected to the bioreactor tank via a pipeline; the bioreactor tank includes a tank body, a three-phase separator fixed to the top of the tank body, and a waste liquid addition device fixed to the bottom of the tank body; the waste liquid addition device is connected to a pulverizer via a pipeline, and the other end of the pulverizer is connected to the wastewater tank via a pipeline; the waste liquid addition device includes a waste liquid delivery pipe, multiple waste liquid nozzles connected to the waste liquid delivery pipe, and a blocking component disposed at the output end of the waste liquid nozzles; the blocking component is rotatably connected to the waste liquid nozzles via a fixing rod.

[0007] The UASB anaerobic bioreactors used for high-concentration wastewater described above enable the UASB wastewater anaerobic reactors to have excellent anti-clogging capabilities.

[0008] As a further improvement of this application, a gas injection device is also provided in the middle of the bioreactor, and the gas injection device is equipped with multiple nozzles.

[0009] As a further improvement of this application, the gas injection device is connected to the bottom of the biogas tank via a pipe, and the top of the biogas tank is connected to the top of the three-phase separator via a pipe.

[0010] As a further improvement of this application, the output ends of the waste liquid nozzles at the blocking components are all set downwards, and the blades of the blocking components are all set at an angle.

[0011] As another improvement of this application, the nozzles of the gas injection device are all set downwards, and a heating device is installed on the connecting pipe between the gas injection device and the biogas tank.

[0012] As a further improvement to this application, gaps are provided between the blades of the blocking element, and the waste liquid conveying pipe on the waste liquid adding device has a mountain-shaped structure.

[0013] In summary, to effectively protect the waste liquid addition device, the first approach is to install it upside down, with the waste liquid nozzle facing downwards. This installation allows the water flow from the waste liquid nozzle to dissolve the sludge during operation of the UASB anaerobic bioreactor. Furthermore, the impact of the water flow on the bottom of the bioreactor tank increases the effective range of the water flow, enhancing the anti-clogging effect. Additionally, a baffle is installed at the waste liquid nozzle, which rotates continuously driven by the water flow, further improving the anti-clogging function. When the UASB anaerobic bioreactor stops operating or the water flow from the waste liquid nozzle is low, the inverted nozzle design effectively prevents sludge blockage, making the anti-clogging effect far superior to that of a typical UASB anaerobic bioreactor. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the UASB anaerobic bioreactor according to the first or second embodiment of this application.

[0015] Figure 2 This is a cross-sectional view of the bioreactor according to the first or second embodiment of this application;

[0016] Figure 3 This is a perspective view of the interior of the bioreactor according to the first or second embodiment of this application;

[0017] Figure 4 This is a partially exploded view of the waste liquid addition device according to the first embodiment of this application;

[0018] Figure 5 This is a partial view of the waste liquid addition device according to the first embodiment of this application.

[0019] Explanation of the labels in the diagram:

[0020] 1. Bioreactor; 11. Three-phase separator; 12. Gas injection device; 13. Waste liquid addition device; 14. Reactor body; 131. Waste liquid delivery pipe; 132. Waste liquid nozzle; 133. Blocking component; 134. Fixing rod; 2. Wastewater tank; 3. Crusher; 4. Biogas tank; 5. Heating device. Detailed Implementation

[0021] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0022] First implementation method:

[0023] Please see Figures 1-5 A UASB anaerobic bioreactor for high-concentration wastewater includes a bioreactor 1 and a wastewater tank 2 connected to the bioreactor 1 via a pipeline. The wastewater tank 2 stores collected wastewater, which flows into the bioreactor 1 through a corresponding pipeline. The bioreactor 1 includes a reactor body 14, a three-phase separator 11 fixed to the top of the reactor body 14, and a waste liquid addition device 13 fixed to the bottom of the reactor body 14. The three-phase separator 11 separates the biogas, supernatant, and solid sludge from the upper layer of the bioreactor 1. The separated biogas is collected by subsequent devices, while the supernatant and solid sludge are returned to the bioreactor 1. The waste liquid adding device 13 is connected to a pulverizer 3 via a pipe. The pulverizer 3 can fully pulverize the solid particles in the waste liquid adding device 13 to prevent large particles from clogging the waste liquid adding device 13. The other end of the pulverizer 3 is connected to a wastewater tank 2 via a pipe. The waste liquid adding device 13 includes a waste liquid conveying pipe 131, multiple waste liquid nozzles 132 connected to the waste liquid conveying pipe 131, and a blocking member 133 set at the output end of the waste liquid nozzles 132. The blocking member 133 rotates around the waste liquid nozzles 132, and the power source of the blocking member 133 is the water flow power sprayed from the waste liquid nozzles 132. The blocking member 133 is rotatably connected to the waste liquid nozzles 132 via a fixing rod 134.

[0024] In addition, the output ends of the waste liquid nozzles 132 at the blocking member 133 are all set downwards. By setting the waste liquid nozzles 132 of the waste liquid adding device 13 downwards, it is possible to prevent sludge from accidentally falling into the waste liquid nozzles 132. Furthermore, the reaction force between the water flow and the bottom plate of the reaction tank 14 can increase the effect of the water flow impacting the sludge, improving the anti-clogging ability. The blades of the blocking member 133 are all inclined. By setting the blades of the blocking member 133 inclined, the water flow potential of the waste liquid nozzle 132 can be effectively converted into the rotational kinetic energy of the blocking member 133, thereby utilizing... The blocking component 133 cleans the sludge around the waste liquid nozzle 132; the blades of the blocking component 133 have gaps that are large enough for the crushed solid particles to pass through, and the use of the crusher 3 also effectively prevents flocculent material from getting stuck on the blocking component 133, thus affecting the use of the device. The waste liquid conveying pipe 131 on the waste liquid adding device 13 has a mountain-shaped structure, which allows the waste liquid adding device 13 to cover the bottom of the bioreactor 1, so that the waste liquid can fill the bioreactor 1 evenly, allowing the waste liquid to fully react with the anaerobic organisms.

[0025] In summary, to effectively protect the waste liquid addition device 13, the waste liquid addition device 13 is installed upside down, that is, with the waste liquid nozzle 132 facing downwards. This installation allows the water flow from the waste liquid nozzle 132 to flush away the sludge during operation of the UASB anaerobic bioreactor, and the impact of the water flow on the bottom of the bioreactor tank 1 increases the original effective range, improving the anti-clogging effect. In addition, a blocking component 133 is also installed at the waste liquid nozzle 132. Driven by the water flow, the waste liquid nozzle 132 rotates continuously, which enhances its anti-clogging function. Since the wastewater in the wastewater tank 2 is processed by the pulverizer 3 and the gap of the blocking component 133 is large enough, the blocking component 133 is not affected by solid impurities in the wastewater. When the UASB anaerobic bioreactor stops working or the water flow of the waste liquid nozzle 132 is small, the inverted waste liquid nozzle 132 can also effectively prevent sludge clogging, making the anti-clogging effect far superior to that of a general UASB anaerobic bioreactor.

[0026] Second implementation method:

[0027] Please see Figures 1-3Unlike the first embodiment, a gas injection device 12 is also provided in the middle of the bioreactor 1. The gas injection device 12 is equipped with multiple nozzles and is connected to the bottom of the biogas tank 4 through a pipe. Since the gas injection device 12 is connected to the biogas tank 4, it can inject biogas from the biogas tank 4 into the bioreactor 1, thereby stirring the liquid in the bioreactor 1. The top of the biogas tank 4 is connected to the top of the three-phase separator 11 through a pipe. The nozzles of the gas injection device 12 are all set downwards. The downward setting can effectively prevent sludge in the bioreactor 1 from falling into the nozzles of the gas injection device 12, thereby preventing the gas injection device 12 from clogging. A heating device 5 is provided on the connecting pipe between the gas injection device 12 and the biogas tank 4. By adding the heating device 5, the temperature in the bioreactor 1 can be controlled at a temperature suitable for anaerobic bacterial reaction, thereby maximizing the operating efficiency of the UASB anaerobic bioreactor.

[0028] In summary, since the first implementation method consumes a large amount of water flow power during operation, and the UASB anaerobic bioreactor produces relatively little gas in the bioreactor 1 at the beginning of operation, resulting in poor stirring effect, a gas injection device 12 is added to the bioreactor 1. This gas injection device 12 is located at the bottom of the sludge layer, where the sludge is mostly suspended particles. By introducing biogas from the biogas tank 4 into the bioreactor 1, the gas injection device 12 can provide sufficient stirring power for the bioreactor 1 and maintain the required low oxygen content. In addition, considering that the temperature inside the UASB anaerobic bioreactor cannot reach the optimal reaction temperature for anaerobic organisms at low temperatures, a heating device 5 can be installed on the connecting pipe between the gas injection device 12 and the biogas tank 4 to allow the UASB anaerobic bioreactor to operate at a high rate even at low temperatures. The heating device 5 can heat the introduced biogas, thereby maintaining the temperature inside the bioreactor 1 at the optimal temperature for anaerobic bacterial reaction, thus maximizing the operating efficiency of the UASB anaerobic bioreactor.

[0029] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A UASB anaerobic bioreactor for high concentration wastewater, characterized by, It includes a biological reaction box (1) and a waste water tank (2) connected with the biological reaction box (1) through a pipeline; The biological reaction box (1) includes a reaction box body (14), a three-phase separator (11) fixed on the top of the reaction box body (14), and a waste liquid adding device (13) fixed on the bottom of the reaction box body (14), the waste liquid adding device (13) is connected with a pulverizer (3) through a pipeline, the other end of the pulverizer (3) is connected with the waste water tank (2) through a pipeline, the waste liquid adding device (13) includes a waste liquid conveying pipe (131), a plurality of waste liquid nozzles (132) connected on the waste liquid conveying pipe (131), and a blocking piece (133) arranged at the output end of the waste liquid nozzle (132), the blocking piece (133) is rotatably connected with the waste liquid nozzle (132) through a fixing rod (134).

2. The UASB anaerobic bioreactor for high concentration wastewater according to claim 1, wherein, The middle part of the biological reaction box (1) is further provided with a gas injection device (12), and a plurality of nozzles are arranged on the gas injection device (12).

3. The UASB anaerobic bioreactor for high concentration wastewater according to claim 2, characterized in that, The gas injection device (12) is connected with the bottom of a biogas tank (4) through a pipeline, and the top of the biogas tank (4) is connected with the top of the three-phase separator (11) through a pipeline.

4. The UASB anaerobic bioreactor for high concentration wastewater according to claim 1, wherein, The output end of the waste liquid nozzle (132) at the blocking piece (133) is arranged downward, and the blades of the blocking piece (133) are arranged obliquely.

5. The UASB anaerobic bioreactor for high concentration wastewater according to claim 2, wherein, The nozzles of the gas injection device (12) are arranged downward, and a heating device (5) is arranged on the connecting pipeline between the gas injection device (12) and the biogas tank (4).

6. The UASB anaerobic bioreactor for high concentration wastewater according to claim 4, wherein, Gaps are arranged between the blades of the blocking piece (133), and the waste liquid conveying pipe (131) on the waste liquid adding device (13) is in a mountain-shaped structure.

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