Membrane biological reduction reactor taking hydrogen as electron donor

Abstract

The utility model belongs to the field of environment-friendly water treatment equipment, and particularly relates to a membrane biological reduction reactor taking hydrogen as an electron donor, which comprises a reaction cylinder, an upper end cover is mounted at the top end of the reaction cylinder, a lower end cover is mounted at the bottom end of the reaction cylinder, and a plurality of groups of core tubes are mounted in the reaction cylinder. A water inlet pipe is fixedly installed in the middle of the lower end cover in a penetrating mode, the top end of the water inlet pipe extends to the upper portion in the reaction cylinder, a water outlet pipe is fixedly installed on the side wall of the reaction cylinder, the bottom end of the water inlet pipe extends to the lower portion of the lower end cover, and a three-way pipe is fixedly installed at the end of the water inlet pipe; filters are fixedly mounted at ports of the other two sides, far away from the water inlet pipe, of the three-way pipe; the filter is arranged to filter impurities such as suspended solids and colloids in untreated sewage, so that the impurities are prevented from entering the reaction cylinder and then being attached to the outer wall of the core tube, and the pollutant degradation efficiency of microorganisms is not influenced.

Description

Technical Field

[0001] The utility model relates to the field of environmentally friendly water treatment equipment, in particular to a membrane bioreduction reactor using hydrogen as an electron donor. Background Art

[0002] In a typical membrane bioreactor (MBR) setup, the core tube increases the effective contact area between the biomass and pollutants in the wastewater, enhancing metabolic activity. Gas enters the hollow lumen, diffuses through the core tube, and comes into contact with the biomass outside the membrane, reducing oxidized pollutants in the wastewater. When hydrogen is used as the reducing gas, gas utilization approaches 100%, with minimal residual gas emissions, thus reducing operating costs.

[0003] The existing patent with publication number CN209957466U discloses a membrane bioreduction reactor using hydrogen as an electron donor. The housing is provided with a central core tube and an inner core. The inner core is provided with hollow fibers and fiber components. The upper end cap is provided with an air inlet, the lower end cap is provided with a water inlet and an air outlet, and a porous tube is provided in the housing connected to the water outlet. Untreated water enters the inner core from the water inlet through the central core tube, flows radially outward, and contacts a large area of ​​the outer surface of the hollow fibers. It degrades and metabolizes pollutants in the water through the fiber components before being discharged from the water outlet. At the same time, gas enters from the air inlet, flows through multiple hollow fiber inner core pipes, and is discharged through the air outlet. The gas entering the inner cavity provides microbial bacteria for growth, forming a biofilm in the inner core. The microbial bacteria adsorb and degrade pollutants in the wastewater, metabolizing pollutants in the wastewater. The advantages of this utility model are high packing density and less clogging in sewage treatment, improving treatment efficiency and increasing the rate of pollutant removal.

[0004] However, the above-mentioned device injects untreated sewage into the interior of the box through the water inlet pipe, which may cause impurities such as suspended matter and colloids in the sewage to gradually accumulate and deposit on the surface of the hollow fiber membrane, which may in turn reduce the degradation efficiency of pollutants; therefore, to address the above problem, a membrane bioreduction reactor using hydrogen as an electron donor is proposed. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology and solve the problem that the above-mentioned device injects untreated sewage into the interior of the box through the water inlet pipe, causing suspended matter, colloids and other impurities in the sewage to gradually accumulate and deposit on the surface of the hollow fiber membrane, which may further reduce the degradation efficiency of pollutants, the utility model proposes a membrane bioreduction reactor with hydrogen as an electron donor.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the membrane bioreduction reactor with hydrogen as electron donor described in the present invention includes a reaction cylinder, an upper end cover is installed on the top of the reaction cylinder, a lower end cover is installed on the bottom of the reaction cylinder, multiple groups of core tubes are installed inside the reaction cylinder, a water inlet pipe is fixedly installed through the middle of the lower end cover, the top of the water inlet pipe extends to the upper part of the interior of the reaction cylinder, a water outlet pipe is fixedly installed on the side wall of the reaction cylinder, the bottom end of the water inlet pipe extends to the bottom of the lower end cover and a tee is fixedly installed on the end, and filters are fixedly installed on the other two side ports of the tee away from the water inlet pipe.

[0007] Preferably, the filter comprises upper and lower symmetrical shells, the adjacent side inner walls of the upper and lower shells are fixedly connected with clamping plates, a filter screen is provided between the clamping plates on both sides, and the upper and lower shells are fixedly connected by a bolt pair.

[0008] Preferably, control valves are fixedly installed on the two ends of the three-way pipe away from the water inlet pipe.

[0009] Preferably, a plurality of water outlet holes are provided on the side wall of the water inlet pipe.

[0010] Preferably, three water outlet pipes are provided and are evenly distributed at corresponding positions of the upper, middle and lower parts of the side wall of the reaction cylinder.

[0011] Preferably, an air inlet pipe is fixedly mounted on the upper end cover, and the air inlet pipe extends to the inner side of the upper end cover, and an air outlet pipe is fixedly mounted on the lower side wall of the reaction cylinder.

[0012] Preferably, gaskets are respectively installed at the contact positions of the upper end cover and the lower end cover with the reaction cylinder, and the air inlet pipe passes through the gasket located above.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model filters the sewage injected into the reaction cylinder by setting a filter first, and filters the suspended matter, colloid and other impurities in the untreated sewage through the filter, so as to prevent the impurities from entering the reaction cylinder and adhering to the outer wall of the core tube, thereby affecting the efficiency of microbial degradation of pollutants.

[0015] 2. The utility model sets a three-way pipe, two control valves and two filters, so that one control valve is in an open state and the other control valve is in a closed state, so that sewage can flow in through one end of the three-way pipe. After using it for a period of time, the valve on the end is closed. At this time, the filter on the end can be disassembled for maintenance and cleaning, and the valve on the other side is opened at the same time so that there is a smooth passage and sewage is allowed to enter. In this way, the device can be used continuously to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0018] Figure 2 It is a partial cross-sectional view of Example 1;

[0019] Figure 3 For Example 1 Figure 2 A schematic diagram of the structure at center A;

[0020] Figure 4 This is a schematic diagram of the water inlet pipe structure of Example 1;

[0021] Figure 5 This is a schematic diagram of the internal structure of the filter in Example 1.

[0022] In the figure: 1. reaction tube; 2. upper end cover; 3. lower end cover; 4. air inlet pipe; 5. air outlet pipe; 6. water outlet pipe; 7. water inlet pipe; 8. tee pipe; 9. control valve; 10. filter; 101. shell; 102. splint; 103. filter screen; 11. core tube; 12. gasket. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1-5As shown, a membrane bioreduction reactor using hydrogen as an electron donor comprises a reaction cylinder 1, an upper end cap 2 is installed at the top of the reaction cylinder 1, a lower end cap 3 is installed at the bottom of the reaction cylinder 1, multiple groups of core tubes 11 are installed inside the reaction cylinder 1, a water inlet pipe 7 is fixedly installed in the middle of the lower end cap 3, the top of the water inlet pipe 7 extends to the top of the interior of the reaction cylinder 1, a water outlet pipe 6 is fixedly installed on the side wall of the reaction cylinder 1, the bottom end of the water inlet pipe 7 extends to the bottom of the lower end cap 3 and a tee pipe 8 is fixedly installed at the end, and the other two side ports of the tee pipe 8 away from the water inlet pipe 7 are fixedly installed. Filter 10; core tube 11 is made of polyester fiber and is used as a carrier for cultivating microorganisms. During operation, untreated sewage is injected from the bottom of filter 10, and suspended matter, colloids and other impurities in the untreated sewage are filtered through filter 10 to prevent the impurities from entering the reaction tube 1 and adhering to the outer wall of core tube 11, thereby affecting the efficiency of microbial degradation of pollutants. The sewage then enters the water inlet pipe 7 through the tee pipe 8 and enters the interior of the reaction tube 1 through the water inlet pipe 7. The sewage flows radially outward, that is, from the water inlet pipe 7 to the outer wall of the reaction tube 1. The sewage contacts the surface of core tube 11 and forms biomass there. One or more microorganisms contained in the biomass can adsorb and degrade pollutants in the sewage, thereby reducing the pollutant content in the outflowing water, and is finally discharged through the outlet 148.

[0026] The filter 10 includes a shell 101 that is symmetrical in upper and lower directions. Clamping plates 102 are fixedly connected on the inner walls of adjacent sides of the upper and lower shells 101. A filter screen 103 is provided between the clamping plates 102 on both sides. The upper and lower shells 101 are fixedly connected by a bolt pair. During operation, impurities in the sewage are filtered through the filter screen 103 to prevent impurities from entering the reaction cylinder 1 and affecting the degradation efficiency of pollutants by internal microorganisms. The upper and lower shells 101 are connected by a bolt pair to facilitate disassembly and assembly of the shell 101, and then the internal filter screen 103 can be cleaned or replaced to ensure the filtering effect.

[0027] Control valves 9 are fixedly installed on the two ends of the three-way pipe 8 away from the water inlet pipe 7. During operation, one control valve 9 is in an open state and the other control valve 9 is in a closed state, so that sewage can flow in through one end of the three-way pipe 8. After using it for a period of time, the valve on the end is closed. At this time, the filter 10 on the end can be disassembled for maintenance and cleaning, and the valve on the other side is opened at the same time so that there is a smooth passage and sewage is allowed to enter. In this way, the device can be used continuously to improve work efficiency.

[0028] The side wall of the water inlet pipe 7 is provided with multiple groups of water outlet holes. When in operation, the sewage can be discharged from the water outlet holes on the side wall of the water inlet pipe 7, so that the sewage can radially pass through the multiple groups of core tubes 11 on the side, so that the sewage can fully contact with the core tubes 11, and the sewage can contact with more microorganisms, so as to improve the degradation efficiency.

[0029] There are three water outlet pipes 6 , which are evenly distributed at corresponding positions at the upper, middle and lower sides of the side wall of the reaction cylinder 1 ; during operation, the treated water inside the reaction cylinder 1 can be discharged.

[0030] An air inlet pipe 4 is fixedly installed on the upper end cover 2, and the air inlet pipe 4 extends to the inner side of the upper end cover 2. An air outlet pipe 5 is fixedly installed on the lower side wall of the reaction cylinder 1. During operation, hydrogen is injected into the inner cavity of the reaction cylinder 1 from the air inlet, and most of the gas diffuses into the wall of the core tube 11 to provide biomass growth on the outer surface of the wall of the core tube 11.

[0031] Example 2

[0032] See also Figure 3 and Figure 4 As shown, compared with Example 1, as another implementation of the present utility model, the upper end cover 2 and the lower end cover 3 are respectively installed with gaskets 12 at the contact positions with the reaction cylinder 1, and the air inlet pipe 4 passes through the gasket 12 located above; during operation, the air tightness of the connection position between the upper end cover 2, the lower end cover 3 and the reaction cylinder 1 can be increased by setting the gasket 12; the air inlet pipe 4 passes through the gasket 12 located above so that the injected hydrogen can smoothly enter the inner cavity of the reaction cylinder 1.

[0033] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A membrane bioreduction reactor using hydrogen as an electron donor, characterized in that: The invention comprises a reaction cylinder (1), wherein an upper end cover (2) is installed at the top of the reaction cylinder (1), a lower end cover (3) is installed at the bottom of the reaction cylinder (1), a plurality of core tubes (11) are installed inside the reaction cylinder (1), a water inlet pipe (7) is fixedly installed in the middle of the lower end cover (3), the top of the water inlet pipe (7) extends to the top of the inside of the reaction cylinder (1), a water outlet pipe (6) is fixedly installed on the side wall of the reaction cylinder (1), the bottom end of the water inlet pipe (7) extends to the bottom of the lower end cover (3) and a three-way pipe (8) is fixedly installed at the end thereof, and filters (10) are fixedly installed on the other two side ports of the three-way pipe (8) away from the water inlet pipe (7).

2. The membrane bioreduction reactor using hydrogen as an electron donor according to claim 1, characterized in that: The filter (10) comprises a housing (101) that is symmetrical in upper and lower directions. Clamping plates (102) are fixedly connected on the inner walls of adjacent sides of the upper and lower housings (101). A filter screen (103) is provided between the clamping plates (102) on both sides. The upper and lower housings (101) are fixedly connected by a pair of bolts.

3. The membrane bioreduction reactor using hydrogen as an electron donor according to claim 2, characterized in that: Control valves (9) are fixedly mounted on the two ends of the three-way pipe (8) away from the water inlet pipe (7).

4. The membrane bioreduction reactor using hydrogen as an electron donor according to claim 3, characterized in that: A plurality of water outlet holes are provided on the side wall of the water inlet pipe (7).

5. The membrane bioreduction reactor using hydrogen as an electron donor according to claim 4, characterized in that: Three water outlet pipes (6) are provided and are evenly distributed at corresponding positions at the top, middle and bottom of the side wall of the reaction cylinder (1).

6. The membrane bioreduction reactor using hydrogen as an electron donor according to claim 5, characterized in that: An air inlet pipe (4) is fixedly mounted on the upper end cover (2), and the air inlet pipe (4) extends to the inner side of the upper end cover (2). An air outlet pipe (5) is fixedly mounted on the lower side wall of the reaction cylinder (1).

7. The membrane bioreduction reactor using hydrogen as an electron donor according to claim 6, characterized in that: Gaskets (12) are respectively installed at the contact positions of the upper end cover (2) and the lower end cover (3) with the reaction cylinder (1), and the air inlet pipe (4) passes through the gasket (12) located above.

Images