A helical symmetric impinging flow anaerobic reactor system

Abstract

This invention relates to a helical symmetrical impinging flow anaerobic reactor system, belonging to the field of wastewater treatment technology. The system includes a reactor comprising, from bottom to top, a water distribution zone, a reaction zone, and a three-phase separation zone. The reaction zone further comprises, from bottom to top, an impinging flow buffer zone and an impinging flow reaction zone. Multiple jet pipes are distributed from bottom to top within the impinging flow buffer zone, supplying hydrogen and / or biogas. This invention, by combining jet pipes with the supply of external hydrogen, increases the impinging flow pattern of the fluid inside the reactor, thereby enhancing liquid-solid mass transfer, improving the efficiency of anaerobic biological treatment, and thus enabling the system to operate in a green and low-carbon manner.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a spiral symmetrical impinging flow anaerobic reactor system. Background Technology

[0002] With the development of modern industry, the pollution level of industrial wastewater has become increasingly serious, causing severe environmental pollution. Wastewater from industries such as printing and dyeing, chemical processing, and papermaking typically contains large amounts of organic matter, high salinity, recalcitrant substances, and toxic and harmful components, with COD levels exceeding 10,000 mg / L. This poses a significant threat to human health and the environment, making the treatment of these pollutants essential.

[0003] Anaerobic reactors are highly favored in industrial wastewater treatment due to their advantages such as high degradation efficiency, wide adaptability, biogas production, and low energy consumption. However, with the gradual increase in COD concentration and the increasing complexity of organic components in industrial wastewater, the efficiency of existing anaerobic reactors (such as UASB, EGSB, and IC reactors, as well as the spiral symmetrical flow anaerobic reactor invented by the applicant) can no longer meet the urgent need for efficient anaerobic biological treatment of industrial wastewater.

[0004] Impacting flow is a recent research advancement in the field of efficient momentum transfer. Its basic principle involves generating two high-speed fluids moving in opposite directions, which collide at the contact surface to create a highly turbulent disturbance zone, thereby enhancing the interphase mass transfer rate. Due to the high-speed, opposing collision of the two fluid streams, the impacting flow technology forms a violently turbulent impact zone, effectively enhancing interphase transfer and promoting micro-mixing. Based on this, to enhance interphase mass transfer between liquid and solid (matrix and microorganisms) phases, the applicant, building upon their existing patented helical symmetrical flow anaerobic reactor, integrates new impacting flow technologies and concepts to achieve new functions and high efficiency, thus inventing a helical symmetrical impacting flow anaerobic reactor system.

[0005] To enhance the activity of anaerobic functional bacteria and increase methane production, the hydrogen partial pressure of the anaerobic system can be rationally controlled. Previous studies have shown that the hydrogen partial pressure can be artificially controlled by adding exogenous hydrogen, thereby promoting the conversion of H2 and CO2 into methane. The methane content in biogas can be increased from the range of 50%–70% to approximately 87% through in-situ exogenous hydrogen addition. Furthermore, on the one hand, increasing the hydrogen concentration in the anaerobic reactor may enhance the activity of homoacetic bacteria, leading to the production of acetic acid via the homoacetogenesis pathway, thus increasing methane production. On the other hand, high hydrogen partial pressure may inhibit the hydrogen and acetic acid production processes, and the accumulation of volatile fatty acids can lower the pH value of anaerobic digestion, negatively impacting anaerobic digestion. Therefore, by introducing exogenous hydrogen and installing valves on each exhaust pipe to control the hydrogen partial pressure (typically 1.6–10 Pa), the methane yield of the anaerobic system can be improved. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a helical symmetrical impinging flow anaerobic reactor system, which combines a jet tube and provides external hydrogen to increase the impinging flow state of the fluid inside the reactor, thereby enhancing liquid-solid mass transfer, improving the efficiency of anaerobic biological treatment, and making the system operate in a green and low-carbon manner.

[0007] To achieve the above objectives, the present invention provides a helical symmetrical impinging flow anaerobic reactor system, comprising a reactor, wherein the reactor is provided from bottom to top with a water distribution zone, a reaction zone and a three-phase separation zone, the reaction zone is provided from bottom to top with an impinging flow buffer zone and an impinging flow reaction zone, and the impinging flow buffer zone is provided with a plurality of jet pipes distributed from bottom to top, the jet pipes being supplied with hydrogen and / or biogas.

[0008] Preferably, the volume ratio of the impact flow reaction zone to the impact flow buffer zone is in the range of 3:1 to 5:1.

[0009] Preferably, there are three jet tubes, distributed at 1 / 5 to 3 / 5 of the axial direction of the impact flow reaction zone and arranged in a spiral symmetrical manner.

[0010] Preferably, the ratio of the distance between two adjacent jet tubes to the total length of the impact flow reaction zone is in the range of 1:3 to 1:5.

[0011] Preferably, the jet tube has a tangential opening in the impinging flow reaction zone, and the ratio of the opening diameter d to the diameter D of the impinging flow reaction zone is in the range of 1:3 to 1:10.

[0012] Preferably, the water distribution zone includes a bottom valve, an inverted cone, support legs, and an inlet pipe. The upper surface of the inverted cone is connected to the lower end of the reaction zone. The reactor is connected to an external hydrogen storage tank, an inlet bucket, an inlet pump, and a circulation pump. Wastewater in the inlet bucket is pumped into the inlet pipe at the top of the water distribution zone of the reactor by the inlet pump. The external hydrogen storage tank is equipped with an external hydrogen pipe, which is divided into multiple branches and connected to the jet pipe respectively.

[0013] Preferably, the inlet of the circulating pump is connected to the three-phase separation zone, and the outlet of the circulating pump is connected to the inlet of the jet pipe. Wastewater in the three-phase separation zone is returned to the impact flow area where the jet pipe is located in the reaction zone, thereby achieving a zoned return flow effect.

[0014] Preferably, the three-phase separation zone is provided from bottom to top with a short cone, an upper column, and a cover plate. The upper column is provided with a three-phase separation component. A water outlet pipe is provided in the upper part of the upper column. The cover plate is connected to the upper part of the three-phase separation component. An internal biogas collection pipe is connected to the center of the top of the three-phase separation component. The internal biogas collection pipe is divided into multiple branches, which are respectively connected to a gas collection pipe and multiple jet pipes.

[0015] Preferably, when external hydrogen is introduced into the jet pipe, the external hydrogen can be carried into the reaction zone by the wastewater in the jet pipe, providing the required hydrogen to the reaction zone.

[0016] Preferably, it also includes a program controller, the jet pipe is connected to a gas pipe for supplying hydrogen and biogas, and the gas pipe is equipped with an electric valve electrically connected to the program controller.

[0017] In summary, the present invention has the following beneficial technical effects:

[0018] First, the jet pipes are tangentially orificed in the impinging flow reaction zone II-1. After the wastewater is injected into the jet pipes by the circulating pump, it undergoes a counter-current collision with the helical flow direction of the wastewater in that cross section under the action of the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6. Macroscopically, this arrangement results in strong interaction and high-intensity momentum transfer between the two wastewater streams; microscopically, it causes the wastewater to be in a state of tight molecular aggregation, forming a violently turbulent impact zone, thus causing the reactor to exhibit an impinging flow pattern in the longitudinal direction. This not only improves the efficiency of anaerobic biodegradation of pollutants but also achieves highly efficient and intensive combination of reaction components.

[0019] Second, the reactor's circulation pipe is connected to the inlet of the jet pipe, allowing the wastewater in the three-phase separation zone III to flow back to the impact flow area where each jet pipe is located in the reaction zone II, thus achieving zoned reflux and completing the recovery of alkalinity.

[0020] Third, the reactor's jet inlet pipe is connected to the jet pipe's suction port. External hydrogen or internal biogas from the jet inlet pipe enters the jet pipe, while wastewater also enters under the action of the circulating pump. The static pressure energy of the wastewater is converted into dynamic pressure energy during this process, creating a negative pressure zone at the suction port (see Figure B, marked b). In this way, external hydrogen or internal biogas is "carried" by the wastewater into the impinging flow reaction zone II-1. This process not only provides the reactor with the necessary hydrogen, promoting the methanation process, but also achieves gas mixing of the wastewater, enhancing the contact between the wastewater and the microbial substrate, thereby accelerating the mass transfer process between the liquid and solid phases.

[0021] Fourth, an impact flow buffer zone II-2 is specially set up in reaction zone II. This buffer zone can slow down or even eliminate the impact flow in reaction zone II, thereby enhancing the separation effect of the three-phase separation zone III.

[0022] Fifth, an external hydrogen storage tank is also installed in the helical symmetrical impinging flow anaerobic reactor system to regulate the hydrogen partial pressure within the reactor. During the reactor start-up or operation phases (such as in cases of insufficient system hydrogen or sudden temperature changes), external hydrogen enters the jet pipe through external hydrogen pipe 17 and is carried into reaction zone II by the wastewater, providing the reactor with the necessary hydrogen and thus regulating the overall hydrogen partial pressure of the reactor. This design ensures the stability of the reactor during start-up and operation, effectively reduces unexpected risks, and promotes methane formation.

[0023] Sixth, the reactor is equipped with a programmable controller 18, and electric valves are installed on the gas collection pipe 11, the first jet inlet pipe 5-2, the second jet inlet pipe 15-2, the third jet inlet pipe 6-2, the external hydrogen pipe 17, and their branches to control the gas flow rate. In this way, the gas content can be automatically controlled, allowing each jet pipe to simultaneously introduce external hydrogen and internal biogas as needed, or selectively introduce one of these gases. This automatically meets the hydrogen partial pressure (1.6 to 10.0 Pa) required by the anaerobic digestion system under mesophilic conditions. Within this range, it avoids the accumulation of intermediate products such as inhibitory volatile fatty acids caused by excessively high hydrogen partial pressure, while promoting methane formation, thus achieving ease of operation and control of the reactor system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a spiral symmetrical impinging flow anaerobic reactor system according to the present invention;

[0025] Figure 2 This is a structural diagram of the jet tube in a spiral symmetrical impinging flow anaerobic reactor system according to the present invention.

[0026] Figure reference numerals: Ⅰ, Water distribution zone; Ⅱ, Reaction zone; Ⅱ-1, Impinging flow reaction zone; Ⅱ-2, Impinging flow buffer zone; Ⅲ, Three-phase separation zone; 1, Bottom valve; 2, Inverted cone; 3, Support leg; 4, Water inlet pipe; 5, First jet pipe; 5-1, First circulation pipe; 5-2, First jet air inlet pipe; 6, Third jet pipe; 6-1, Third circulation pipe; 6-2, Third jet air inlet pipe; 7, Short cone; 8, Upper column; 9, Three-phase separation component; 10, Cover plate; 11, Gas 12. Collection pipe; 13. Internal biogas collection pipe; 14. Water outlet pipe; 15. Sampling port; 16. Second jet pipe; 17. Second circulation pipe; 18. Second jet air inlet pipe; 19. External hydrogen storage tank; 20. External hydrogen pipe; 21. Program controller; 22. Electric valve 1; 23. Electric valve 2; 34. Electric valve 3; 45. Electric valve 4; 26. Electric valve 5; 27. Electric valve 6; 28. Electric valve 7; 29. ​​Electric valve 8. Detailed Implementation

[0027] To make the present invention more apparent and understandable, a preferred embodiment is described in detail below with reference to the accompanying drawings. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0028] This invention discloses a helical symmetrical impinging flow anaerobic reactor system. The system structure, arranged from left to right, includes an external hydrogen storage tank 16, an inlet tank, an inlet pump, a reactor, and a circulation pump. The external hydrogen storage tank 16 delivers external hydrogen to the reactor via an external hydrogen gas pipe 17. The reactor is divided from bottom to top into a water distribution zone I, a reaction zone II, and a three-phase separation zone III. Reaction zone II is further subdivided into an impinging flow reaction zone II-1 and an impinging flow buffer zone II-2. In the impinging flow reaction zone II-1, three jet pipes are arranged in a tangentially helical symmetrical manner: a first jet pipe 5, a second jet pipe 15, and a third jet pipe 6. The air intakes of these jet pipes are connected to the first jet inlet pipe 5-2, the second jet inlet pipe 15-2, and the third jet inlet pipe 6-2, respectively, while their water inlets are connected to the first circulation pipe 5-1, the second circulation pipe 15-1, and the third circulation pipe 6-1, respectively. This invention, by introducing exogenous hydrogen and impinging flow technology, possesses advantages such as promoting micro-mixing, effectively enhancing interphase transport, and increasing methane yield. This enables the reactor to adopt a greener and lower-carbon decontamination route, achieve a highly efficient and intensive reaction combination, and enhance the degradation performance of organic matter by the anaerobic three-stage functional microbial community.

[0029] The entire reactor is divided into three zones from bottom to top: water distribution zone I, reaction zone II, and three-phase separation zone III. Water distribution zone I includes a bottom valve 1, an inverted cone 2, support legs 3, and an inlet pipe 4, wherein the upper surface of the inverted cone 2 is connected to the lower end of reaction zone II. Wastewater is first pumped from the inlet tank into water distribution zone I of the reactor by the inlet pump, specifically into the inlet pipe 4 at the top of water distribution zone I.

[0030] Within the impact flow reaction zone II-1, a first jet pipe 5, a second jet pipe 15, and a third jet pipe 6 are arranged sequentially from bottom to top. Specifically, the first jet pipe 5 is connected to the first circulation pipe 5-1 on its left and to the first jet inlet pipe 5-2 above it; the second jet pipe 15 is connected to the second circulation pipe 15-1 on its right and to the second jet inlet pipe 15-2 above it; the third jet pipe 6 is connected to the third circulation pipe 6-1 on its left and to the third jet inlet pipe 6-2 above it. The upper part of the impact flow reaction zone II-1 is the impact flow buffer zone II-2, and several sampling ports 14 are provided on both the impact flow reaction zone II-1 and the impact flow buffer zone II-2.

[0031] The three-phase separation zone III consists of a short cone 7, an upper column 8, and a cover plate 10, arranged from bottom to top. A three-phase separation component 9 is located inside the cover plate 10. A water outlet pipe 13 is located in the upper middle part of the upper column 8, while the cover plate 10 is connected to the upper part of the three-phase separation component 9. An internal biogas collection pipe 12 is located at the center of the top of the three-phase separation component 9. This internal biogas collection pipe 12 is divided into four branches, connecting to the first jet inlet pipe 5-2, the second jet inlet pipe 15-2, the third jet inlet pipe 6-2, and the gas collection pipe 11, respectively. Electric valves N-0, N-1, N-2, and N-3 are respectively installed on the gas collection pipe 11, the first jet inlet pipe 5-2, the second jet inlet pipe 15-2, and the third jet inlet pipe 6-2.

[0032] The external hydrogen storage tank 16 is equipped with an external hydrogen pipeline 17, which is divided into three branches, connected to the intake ports of the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6 respectively (see Figure B, marked b for specific locations). Electric valves five W-0, six W-1, seven W-2, and eight W-3 are installed on the external hydrogen pipeline 17 and its branches. The programmable controller 18 can control the electric valves on the internal biogas pipeline and the external hydrogen pipeline 17 and its branches, including electric valve two N-1, electric valve three N-2, electric valve four N-3, electric valve five W-0, electric valve six W-1, electric valve seven W-2, and electric valve eight W-3. In this way, each jet pipe can simultaneously introduce internal biogas and external hydrogen as needed, or select only one gas, and the entire process can be automatically regulated.

[0033] Within the impinging flow reaction zone II-1, the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6 are positioned at 1 / 5 to 3 / 5 of the zone and arranged in a helical symmetrical manner. The ratio of the spacing between two adjacent jet pipes to the total length of the impinging flow reaction zone II-1 is 1:(3 to 5). Furthermore, these three jet pipes have tangential openings in the impinging flow reaction zone II-1, with the ratio of their aperture d to the diameter D of the impinging flow reaction zone II-1 being 1:(3 to 10). When wastewater is pumped into these jet pipes via a circulating pump, the wastewater within the jet pipes undergoes a counter-impinging collision with the helical flow direction of the wastewater in that cross-section under the combined action of the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6. At a macroscopic level, a strong interaction occurs between these two streams of wastewater, resulting in a high-intensity momentum transfer; at a microscopic level, the wastewater is in a state of tight molecular aggregation, causing the impinging flow reaction zone II-1 to exhibit an impinging flow pattern in the longitudinal direction.

[0034] The first circulation pipe 5-1, the second circulation pipe 15-1, and the third circulation pipe 6-1 are connected to the inlets of the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6 (specific locations are shown in Figure B, marked a). In this way, the wastewater in the three-phase separation zone III can be returned to the reaction zone II, specifically to the impinging flow region where the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6 are located. This design achieves zoned wastewater return, thereby enabling effective alkalinity recovery within the impinging flow region.

[0035] The first jet inlet pipe 5-2, the second jet inlet pipe 15-2, and the third jet inlet pipe 6-2 are connected to the air intakes (specific locations shown in Figure B, marked b) of the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6, respectively. When wastewater enters the jet pipe through the circulation pipe, its static pressure energy is converted into dynamic pressure energy, forming a negative pressure zone at the air intake (Figure B, b). At this time, external hydrogen or internal biogas in the jet inlet pipe is drawn into the jet pipe from the air intake (Figure B, b) and "carried" by the flowing wastewater, entering the impact flow reaction zone II-1 together. This process not only provides the required hydrogen for reaction zone II but also achieves the stirring effect of the gas on the wastewater, thereby accelerating the mass transfer process between the liquid and solid phases.

[0036] The volume ratio of the impinging flow reaction zone II-1 to the impinging flow buffer zone II-2 is set to (3-5):1. This design allows the impinging flow buffer zone II-2 to effectively mitigate or even eliminate the strong impinging flow generated by the impinging flow reaction zone II-1. In this way, the impinging flow buffer zone II-2 further enhances the separation effect of the three-phase separation zone III, improving the efficiency and stability of the entire system during the processing.

[0037] External hydrogen gas is introduced into the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6 through the external hydrogen gas pipe 17. Subsequently, this external hydrogen gas is "carried" by the flowing wastewater and enters reaction zone II together. This process not only provides the required hydrogen gas for reaction zone II, but also enables the controllability of the hydrogen partial pressure throughout reaction zone II, thereby optimizing the reaction conditions and improving the reaction efficiency.

[0038] The programmable controller 18 is connected to the gas collection pipe 11, the first jet inlet pipe 5-2, the second jet inlet pipe 15-2, the third jet inlet pipe 6-2, and the external hydrogen pipe 17, as well as the electric valves on their respective branches. These electric valves include electric valve one N-0, electric valve two N-1, electric valve three N-2, electric valve four N-3, electric valve five W-0, electric valve six W-1, electric valve seven W-2, and electric valve eight W-3. Through a preset program, the programmable controller 18 can automatically regulate the gas flow rate, allowing each jet pipe to simultaneously introduce external hydrogen and internal biogas, or to introduce only one gas as needed. This automatic control mechanism ensures that the anaerobic digestion system can maintain the required hydrogen partial pressure under mesophilic conditions, precisely controlled within the range of 1.6 to 10 Pascals. Therefore, the operation of the helical symmetrical impinging flow anaerobic reactor system becomes extremely simple and easy to control.

[0039] The specific operation mode of this invention is as follows:

[0040] Organic wastewater first flows into distribution zone I through inlet pipe 4, then is evenly distributed and enters impinging flow reaction zone II-1. The flow path of the wastewater is as follows: starting from the bottom of impinging flow reaction zone II-1, then passing through the first jet pipe 5 into the middle of impinging flow reaction zone II-1, then through the second jet pipe 15 to the upper part of impinging flow reaction zone II-1, and finally flowing into impinging flow buffer zone II-2 through the third jet pipe 6. The biogas slurry treated in reaction zone II then enters three-phase separation zone III. During this process, sludge is returned to reaction zone II, while clean water is discharged through outlet pipe 13. It is worth noting that some clean water will be pumped back into the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6 by the circulation pump. Due to the negative pressure generated by the air intake of the jet pipes, endogenous biogas is introduced into impinging flow reaction zone II-1 through the first jet air intake pipe 5-2, the second jet air intake pipe 15-2, and the third jet air intake pipe 6-2, respectively.

[0041] Specifically, during the reactor start-up phase or when operating conditions change, the external hydrogen storage tank 16 supplies hydrogen longitudinally to the entire anaerobic system via the external hydrogen pipeline 17. To precisely control the hydrogen flow rate, the external hydrogen pipeline 17 and its various branches, as well as each jet inlet pipe, are equipped with electric valves.

[0042] The helical symmetric impinging flow reactor system of the present invention has the following significant advantages:

[0043] First, the jet pipes are tangentially orificed in the impinging flow reaction zone II-1. After the wastewater is injected into the jet pipes by the circulating pump, it undergoes a counter-current collision with the helical flow direction of the wastewater in that cross section under the action of the first jet pipe 5, the second jet pipe 15, and the third jet pipe 6. Macroscopically, this arrangement results in strong interaction and high-intensity momentum transfer between the two wastewater streams; microscopically, it causes the wastewater to be in a state of tight molecular aggregation, forming a violently turbulent impact zone, thus causing the reactor to exhibit an impinging flow pattern in the longitudinal direction. This not only improves the efficiency of anaerobic biodegradation of pollutants but also achieves highly efficient and intensive combination of reaction components.

[0044] Second, the reactor's circulation pipe is connected to the inlet of the jet pipe, allowing the wastewater in the three-phase separation zone III to flow back to the impact flow area where each jet pipe is located in the reaction zone II, thus achieving zoned reflux and completing the recovery of alkalinity.

[0045] Third, the reactor's jet inlet pipe is connected to the jet pipe's suction port. External hydrogen or internal biogas from the jet inlet pipe enters the jet pipe, while wastewater also enters under the action of the circulating pump. The static pressure energy of the wastewater is converted into dynamic pressure energy during this process, creating a negative pressure zone at the suction port (see Figure B, marked b). In this way, external hydrogen or internal biogas is "carried" by the wastewater into the impinging flow reaction zone II-1. This process not only provides the reactor with the necessary hydrogen, promoting the methanation process, but also achieves gas mixing of the wastewater, enhancing the contact between the wastewater and the microbial substrate, thereby accelerating the mass transfer process between the liquid and solid phases.

[0046] Fourth, an impact flow buffer zone II-2 is specially set up in reaction zone II. This buffer zone can slow down or even eliminate the impact flow in reaction zone II, thereby enhancing the separation effect of the three-phase separation zone III.

[0047] Fifth, an external hydrogen storage tank 16 is also installed in the helical symmetrical impinging flow anaerobic reactor system to regulate the hydrogen partial pressure within the reactor. During the reactor start-up or operation phases (such as in cases of insufficient system hydrogen or sudden temperature changes), external hydrogen enters the jet pipe through the external hydrogen pipe 17 and is carried by the wastewater into reaction zone II, providing the reactor with the necessary hydrogen and thus regulating the overall hydrogen partial pressure of the reactor. This design ensures the stability of the reactor during start-up and operation, effectively reduces unexpected risks, and promotes methane formation.

[0048] Sixth, the reactor is equipped with a programmable controller 18, and electric valves are installed on the gas collection pipe 11, the first jet inlet pipe 5-2, the second jet inlet pipe 15-2, the third jet inlet pipe 6-2, the external hydrogen pipe 17, and their branches to control the gas flow rate. In this way, the gas content can be automatically controlled, allowing each jet pipe to simultaneously introduce external hydrogen and internal biogas as needed, or selectively introduce one of these gases. This automatically meets the hydrogen partial pressure (1.6 to 10 Pascals) required for anaerobic digestion systems under mesophilic conditions. Within this range, it avoids the accumulation of inhibitory volatile fatty acids and other intermediate products caused by excessively high hydrogen partial pressure, while promoting methane formation, thus achieving ease of operation and control of the reactor system.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A helical symmetrical impinging flow anaerobic reactor system, characterized in that, The reactor includes a water distribution zone (Ⅰ), a reaction zone (Ⅱ), and a three-phase separation zone (Ⅲ) from bottom to top. The reaction zone (Ⅱ) includes an impinging flow buffer zone (Ⅱ-2) and an impinging flow reaction zone (Ⅱ-1) from bottom to top. In the impact flow reaction zone (Ⅱ-1), three jet pipes are arranged in a tangential spiral symmetrical manner, namely the first jet pipe (5), the second jet pipe (15) and the third jet pipe (6). The air intake of the three jet pipes is connected to the first jet air inlet pipe (5-2), the second jet air inlet pipe (15-2) and the third jet air inlet pipe (6-2) respectively. The water inlet is connected to the first circulation pipe (5-1), the second circulation pipe (15-1) and the third circulation pipe (6-1) respectively. The three jet pipes are supplied with hydrogen and / or biogas. The separated water in the three-phase separation zone (Ⅲ) is pumped into the first jet pipe (5), the second jet pipe (15), and the third jet pipe (6) respectively through the first circulation pipe (5-1), the second circulation pipe (15-1), and the third circulation pipe (6-1) under the action of the circulation pump. The air inlets of the three jet pipes generate negative pressure, and the endogenous biogas is introduced into the impact flow reaction zone (Ⅱ-1) through the first jet air inlet pipe (5-2), the second jet air inlet pipe (15-2), and the third jet air inlet pipe (6-2) respectively.

2. The helical symmetrical impinging flow anaerobic reactor system according to claim 1, characterized in that, The volume ratio of the impact flow reaction zone (Ⅱ-1) to the impact flow buffer zone (Ⅱ-2) ranges from 3:1 to 5:

1.

3. The helical symmetrical impinging flow anaerobic reactor system according to claim 2, characterized in that, The three jet tubes are distributed at 1 / 5 to 3 / 5 of the axial direction of the impact flow reaction zone (Ⅱ-1).

4. The helical symmetrical impinging flow anaerobic reactor system according to claim 3, characterized in that, The ratio of the distance between two adjacent jet tubes to the total length of the impact flow reaction zone (Ⅱ-1) ranges from 1:3 to 1:

5.

5. The helical symmetrical impinging flow anaerobic reactor system according to claim 4, characterized in that, The jet tube has a tangential opening in the impact flow reaction zone (Ⅱ-1), and the ratio of its diameter d to the diameter D of the impact flow reaction zone (Ⅱ-1) is in the range of 1:3 to 1:

10.

6. A helical symmetrical impinging flow anaerobic reactor system according to any one of claims 1-5, characterized in that, The water distribution zone (Ⅰ) includes a bottom valve (1), an inverted cone (2), a support leg (3), and an inlet pipe (4). The upper surface of the inverted cone (2) is connected to the lower end of the reaction zone (Ⅱ). The reactor is connected to an external hydrogen storage tank (16), an inlet bucket, an inlet pump, and a circulation pump. Wastewater in the inlet bucket is pumped into the inlet pipe (4) at the top of the water distribution zone (Ⅰ) of the reactor through the inlet pump. An external hydrogen storage tank (16) is provided with an external hydrogen pipe (17). The external hydrogen pipe (17) is divided into multiple branches and connected to the jet pipe respectively.

7. The helical symmetrical impinging flow anaerobic reactor system according to claim 6, characterized in that, The inlet of the circulating pump is connected to the three-phase separation zone (Ⅲ), and the outlet of the circulating pump is connected to the inlet of the jet pipe. Wastewater in the three-phase separation zone (Ⅲ) is returned to the impact flow area where the jet pipe is located in the reaction zone (Ⅱ), thereby realizing the zoned return function.

8. A helical symmetrical impinging flow anaerobic reactor system according to any one of claims 1-5, characterized in that, The three-phase separation zone (Ⅲ) is provided with a short cone (7), an upper column (8) and a cover plate (10) from bottom to top. The upper column (8) is provided with a three-phase separation component (9). The upper part of the upper column (8) is provided with a water outlet pipe (13). The cover plate (10) is connected to the upper part of the three-phase separation component (9). The center of the top of the three-phase separation component (9) is connected to an internal biogas collection pipe (12). The internal biogas collection pipe (12) is divided into multiple paths, which are respectively connected to a gas collection pipe (11) and multiple jet pipes.

9. The helical symmetrical impinging flow anaerobic reactor system according to claim 6, characterized in that, When external hydrogen is introduced into the jet pipe, the external hydrogen can be carried into the reaction zone (II) by the wastewater in the jet pipe, providing the required hydrogen for the reaction zone (II).

10. A helical symmetrical impinging flow anaerobic reactor system according to any one of claims 1-5, characterized in that, It also includes a program controller (18), the jet tube is connected to a gas pipe for supplying hydrogen and biogas, and the gas pipe is equipped with an electric valve electrically connected to the program controller (18).

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