Hydrogen production device for high-concentration organic wastewater

Abstract

The invention relates to a hydrogen production device for high-concentration organic wastewater, which is applied to the technical field of hydrogen production, and comprises a wastewater pretreatment unit, a hydrogen production unit, a gas purification unit, a hydrogen storage unit and a leakage monitoring unit, the hydrogen production unit comprises a dark fermentation module, a light fermentation module and an intermediate product transfer module, the gas purification unit comprises a gas-water separator, a mixing buffer tank, a PTFE membrane separator and an alkali liquor washing tower, the hydrogen storage unit comprises a hydrogen storage tank, and the leakage monitoring unit comprises a storage tank monitoring mechanism; according to the hydrogen production device, high-concentration organic wastewater can be efficiently converted into high-purity hydrogen, waste is treated with waste, waste is turned into wealth, the leakage monitoring unit can comprehensively monitor the hydrogen storage unit in real time on the basis of an active airflow guiding mechanism, once hydrogen leakage occurs, the leakage can be found in time, an alarm is given, and the hydrogen production efficiency is improved. And the safety of the hydrogen production process is obviously improved.

Description

TECHNICAL FIELD

[0001] The application relates to a hydrogen production device, in particular to a hydrogen production device for high-concentration organic wastewater. BACKGROUND

[0002] Hydrogen is a clean energy that does not rely on fossil fuels. If hydrogen energy is used to replace traditional fossil energy, it can solve the environmental problems caused by energy utilization, improve the ecological environment, and alleviate the global energy crisis.

[0003] High-concentration organic wastewater (COD >= 2000 mg / L) is common in the pharmaceutical, chemical, and dyeing industries. It has complex components, strong biological toxicity, and a high proportion of refractory organic matter. Traditional treatment methods (such as biochemical methods and physical and chemical methods) have low efficiency, high cost, and are prone to secondary pollution.

[0004] Combining the treatment of high-concentration organic wastewater with the hydrogen production process can not only effectively degrade and harmlessly treat organic pollutants, but also convert the chemical energy contained in the wastewater into high-value clean energy hydrogen, achieving the goal of "waste treatment and waste utilization".

[0005] In the prior art, there are technologies that combine organic wastewater treatment with hydrogen production. For example, Chinese Patent No. CN116161832B discloses a hydrogen production system for high-concentration organic industrial wastewater, which uses dry sludge mixed with colloidal agglomerates to form a settling treatment and uses the remaining sludge produced by the biochemical process for acidification treatment to produce hydrogen. For another example, Chinese Patent No. CN100491270C discloses a hydrogen production device and method using high-concentration organic wastewater, which uses a two-phase anaerobic wastewater biological treatment process to produce hydrogen.

[0006] Hydrogen is a highly flammable gas that can form an explosive mixture when mixed with air and can explode when exposed to heat or open flames. In the process of producing hydrogen from high-concentration organic wastewater, if hydrogen leaks occur, it is likely to cause serious safety accidents. However, most of the existing hydrogen production devices focus on improving hydrogen production efficiency and ignore the importance of hydrogen leakage monitoring, which has the problem of insufficient safety. Therefore, we propose a hydrogen production device for high-concentration organic wastewater. SUMMARY

[0007] In view of the above prior art, the technical problem to be solved by the present application is that most of the existing hydrogen production devices focus on improving hydrogen production efficiency and ignore the importance of hydrogen leakage monitoring, which has the problem of insufficient safety.

[0008] To solve the above problems, the application provides a hydrogen production device for high-concentration organic wastewater, which comprises a wastewater pretreatment unit, a hydrogen production unit, a gas purification unit, a hydrogen storage unit and a leakage monitoring unit. The wastewater pretreatment unit comprises a grid filter tank and an adjusting tank, which are used for pretreating the wastewater. The hydrogen production unit comprises a dark fermentation module, a light fermentation module and an intermediate product transfer module, which are used for preparing hydrogen based on a two-step biological hydrogen production method and the pretreated wastewater. The gas purification unit comprises a gas-water separator, a mixing buffer tank, a PTFE membrane separator and an alkali washing tower connected in sequence, which are used for purifying the hydrogen prepared by the hydrogen production unit. The hydrogen storage unit comprises a hydrogen storage tank used for storing the purified hydrogen, and the side wall of the hydrogen storage tank is provided with an inlet pipe and an outlet pipe. The leakage monitoring unit comprises a storage tank monitoring mechanism, which comprises a package tank cylinder covering the hydrogen storage tank, and the side wall of the package tank cylinder is provided with an inlet sleeve pipe and an outlet sleeve pipe matched with the inlet pipe and the outlet pipe respectively, the top end of the package tank cylinder is communicated with a collection cylinder, the collection cylinder is fixedly installed with a flow driving fan, the top end of the flow driving fan is communicated with an exhaust pipe, the exhaust pipe is fixedly installed with a support net, the bottom end of the support net is fixedly installed with a hydrogen sensor, the bottom of the package tank cylinder is provided with a support seat, and the top end of the support seat is fixedly installed with a top tank inlet net cylinder, the top end of the top tank inlet net cylinder penetrates through the bottom end outer wall of the package tank cylinder and extends to be fixedly connected with the bottom end of the hydrogen storage tank.

[0009] In the hydrogen production device for high-concentration organic wastewater, the leakage monitoring unit can comprehensively and real-timely monitor the hydrogen storage unit based on an active airflow guiding mechanism, and once hydrogen leakage occurs, it can be found and alarmed in time, thereby significantly improving the safety of the hydrogen production process.

[0010] As a further improvement of the application, the inlet sleeve pipe is sleeved outside the inlet pipe, and the inlet pipe extends to the outside of the package tank cylinder through the inlet sleeve pipe, the outlet sleeve pipe is sleeved outside the outlet pipe, and the outlet pipe extends to the outside of the package tank cylinder through the outlet sleeve pipe, the bottom end of the collection cylinder is provided in an open shape, and the top tank inlet net cylinder has a porous net structure.

[0011] As a further improvement of the application, the leakage monitoring unit further comprises an analysis and leakage judgment module and a leakage alarm module, the hydrogen sensor is signal connected with the analysis and leakage judgment module, and the analysis and leakage judgment module is signal connected with the leakage alarm module.

[0012] As a further improvement of the application, the dark fermentation module comprises an anaerobic fermentation reactor, and the preliminary hydrogen production is performed by anaerobic hydrogen-producing bacteria. The intermediate product transfer module comprises a gas stripping and deacidification tower and a pH adjusting tank. The photo-fermentation module comprises a photosynthetic reactor, and hydrogen is further produced by photosynthetic hydrogen-producing bacteria.

[0013] As a further improvement of the present application, the anaerobic fermentation reactor is provided with a double-outlet pipeline, the double-outlet pipeline comprises a main gas outlet pipe and a shunt gas outlet pipe, the shunt gas outlet pipe is connected to the gas inlet of the gas stripping acid removal tower through a shunt valve, and the gas outlet of the gas stripping acid removal tower is connected to the gas-water separator through an acid mist catcher.

[0014] As a further improvement of the present application, the gas purification unit further comprises a dry desulfurization tower and a Roots blower, the gas inlet of the dry desulfurization tower is connected to the main gas outlet pipe of the anaerobic fermentation reactor, the gas inlet of the Roots blower is connected to the gas outlet of the photo-fermentation reactor, and the gas outlets of the dry desulfurization tower and the Roots blower are both connected to the gas-water separator.

[0015] As another improvement of the present application, the leakage monitoring unit further comprises a precision control module, and the storage tank monitoring mechanism further comprises a gas charging precision assembly, the gas charging precision assembly comprises a gas charging cylinder and an electromagnetic valve, a vertical downward electric push rod is fixedly installed in the gas charging cylinder, a gas charging plate in sliding sealing connection with the gas charging cylinder is fixedly connected to the output end of the electric push rod, and a plurality of exhaust holes are formed in the side wall of the electric push rod and are uniformly distributed in a ring shape.

[0016] As a supplement to another improvement of the present application, the gas charging cylinder is located above the exhaust pipe, the top end of the exhaust pipe is in communication with the inside of the gas charging cylinder, the electromagnetic valve is arranged on the exhaust pipe and is located below the hydrogen sensor, the precision control module is in signal connection with the flow driving fan, the electromagnetic valve and the analysis and leakage judgment module, and the exhaust holes are located below the gas charging plate.

[0017] In summary, the hydrogen production device in the present application can efficiently convert high-concentration organic wastewater into high-purity hydrogen, realizing waste treatment and turning waste into treasure, and the leakage monitoring unit can perform all-round real-time monitoring on the hydrogen storage unit based on the active airflow guiding mechanism. Whether it is the hydrogen storage container itself or the gas pipeline connection with the outside world, once hydrogen leakage occurs, it can be discovered and alarmed in time, significantly improving the safety of the hydrogen production process. Through the joint arrangement of the gas charging precision assembly and the precision control module, the precision control module can periodically perform accurate verification operations, so that if there is slight leakage in the hydrogen storage unit, it can also be discovered and alarmed in time, thereby improving the accuracy and reliability of hydrogen leakage monitoring and further improving the safety of the hydrogen production process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural block diagram of the hydrogen production device in the first embodiment of the present application; Figure 2 It is a three-dimensional structural schematic diagram of the storage tank monitoring mechanism in the first embodiment of the present application; Figure 3 Fig. 1 is a schematic diagram of a perspective view of a package tank cylinder according to a first embodiment of the present application; Figure 4 Fig. 2 is a schematic diagram of a front view of a package tank cylinder according to the first embodiment of the present application; Figure 5 Fig. 3 is a schematic diagram of a sectional view of a collection cylinder according to the first embodiment of the present application; Figure 6 Fig. 4 is a schematic diagram of a perspective view of a storage tank monitoring mechanism according to a second embodiment of the present application; Figure 7 Fig. 5 is a schematic diagram of a sectional view of a pressure cylinder according to the second embodiment of the present application; Figure 8 Fig. 6 is a structural block diagram of a leakage monitoring unit according to the second embodiment of the present application.

[0019] Fig. 7 is a legend of the figures. 101, hydrogen storage tank; 102, gas inlet pipe; 103, gas outlet pipe; 201, package tank cylinder; 202, inlet sleeve conduit; 203, outlet sleeve conduit; 204, collection cylinder; 205, flow driving fan; 206, exhaust pipe; 207, support net; 208, hydrogen sensor; 209, support seat; 210, top tank gas inlet net cylinder; 301, pressure cylinder; 302, electromagnetic valve; 303, electric push rod; 304, pressure plate; 305, exhaust hole. DETAILED DESCRIPTION

[0020] The two embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0021] First embodiment: Figures 1-5 A hydrogen production device for high-concentration organic wastewater is shown, which comprises a wastewater pretreatment unit, a hydrogen production unit, a gas purification unit, a hydrogen storage unit, and a leakage monitoring unit. The wastewater pretreatment unit comprises a grid filter tank and an adjusting tank, and is used for pretreating wastewater. The hydrogen production unit comprises a dark fermentation module, a photo fermentation module, and an intermediate product transfer module, and is used for producing hydrogen based on a two-step biological hydrogen production method and using pretreated wastewater. The gas purification unit comprises a gas-water separator, a mixing buffer tank, a PTFE membrane separator, and an alkali washing tower connected in sequence, and is used for purifying hydrogen produced by the hydrogen production unit. The hydrogen storage unit comprises a hydrogen storage tank 101 used for storing purified hydrogen, and the hydrogen storage tank 101 is provided with a gas inlet pipe 102 and a gas outlet pipe 103 on a side wall thereof. The leakage monitoring unit comprises a storage tank monitoring mechanism, the storage tank monitoring mechanism comprises a package tank cylinder 201 covering the hydrogen storage tank 101, the side wall of the package tank cylinder 201 is provided with an inlet sleeve conduit 202 and an outlet sleeve conduit 203 matched with the gas inlet pipe 102 and the gas outlet pipe 103 respectively, the top end of the package tank cylinder 201 is communicated with a collection cylinder 204, the collection cylinder 204 is fixedly installed with a flow driving fan 205, the top end of the flow driving fan 205 is communicated with an exhaust pipe 206, the exhaust pipe 206 is fixedly installed with a support net 207, the bottom end of the support net 207 is fixedly installed with a hydrogen sensor 208, the bottom of the package tank cylinder 201 is provided with a support seat 209, the top end of the support seat 209 is fixedly installed with a top tank inlet net cylinder 210, the top end of the top tank inlet net cylinder 210 penetrates the bottom end outer wall of the package tank cylinder 201 and extends to be fixedly connected with the bottom end of the hydrogen storage tank 101.

[0022] The inlet sleeve conduit 202 is sleeved on the outside of the gas inlet pipe 102, and the gas inlet pipe 102 extends to the outside of the package tank cylinder 201 through the inlet sleeve conduit 202, the outlet sleeve conduit 203 is sleeved on the outside of the gas outlet pipe 103, and the gas outlet pipe 103 extends to the outside of the package tank cylinder 201 through the outlet sleeve conduit 203, the bottom end of the collection cylinder 204 is provided in an open shape, and the top tank inlet net cylinder 210 is a porous net structure.

[0023] The leakage monitoring unit further comprises an analysis and leakage judgment module and a leakage alarm module, the hydrogen sensor 208 is signal connected with the analysis and leakage judgment module, and the analysis and leakage judgment module is signal connected with the leakage alarm module.

[0024] The dark fermentation module comprises an anaerobic fermentation reactor, and hydrogen is preliminarily prepared by anaerobic hydrogen-producing bacteria; The intermediate product transfer module comprises a gas stripping acid removal tower and a pH adjusting tank; The photo fermentation module comprises a photosynthetic reactor, and hydrogen is further prepared by photosynthetic hydrogen-producing bacteria.

[0025] The anaerobic fermentation reactor is provided with a double-outlet pipeline, the double-outlet pipeline comprises a main gas outlet pipe and a shunt gas outlet pipe, the shunt gas outlet pipe is connected with the gas inlet of the gas stripping acid removal tower through a shunt valve, and the gas outlet of the gas stripping acid removal tower is connected with the gas-water separator through an acid mist collector.

[0026] The gas purification unit further comprises a dry desulfurization tower and a Roots blower, the gas inlet of the dry desulfurization tower is connected with the main gas outlet pipe of the anaerobic fermentation reactor, the gas inlet of the Roots blower is connected with the gas outlet of the photo fermentation reactor, and the gas outlets of the dry desulfurization tower and the Roots blower are both connected with the gas-water separator.

[0027] The hydrogen preparation process of the hydrogen preparation device in the application is as follows: 1. wastewater pretreatment Screening: high concentration organic wastewater (COD 8000-50000 mg / L) was screened by a screening tank to intercept suspended solids (SS > 500 mg / L); Homogenization adjustment: the filtered wastewater entered the adjustment tank, heated to 35-40℃ by solar sandwich, and pH was adjusted to 6.0-7.0 by adding acid / base, and stayed for 2-4 hours.

[0028] 2. Dark fermentation for hydrogen production Anaerobic hydrogen production: the pretreated wastewater was pumped into an anaerobic fermentation reactor (35±1℃), and anaerobic hydrogen-producing bacteria were inoculated to decompose organic matter, producing: Gas phase products: H2 (60-70%), CO2 (30-40%), and trace amounts of H2S (50-200 ppm).

[0029] Liquid phase products: fermentation broth containing volatile organic acids (VFA, acetic acid + butyric acid > 8 g / L).

[0030] Gas shunting: Main gas outlet pipe → dark fermentation main gas (90-95% gas phase products) → dry desulfurization tower (remove H2S).

[0031] Shunt gas outlet pipe → dark fermentation branch gas (5-10% gas phase products) → shunt valve (depressurized to 0.02 MPa) → input gas stripping acid removal tower.

[0032] 3. Intermediate product transfer Gas stripping acid removal: The dark fermentation liquid phase product entered the bottom of the gas stripping acid removal tower, and the dark fermentation branch gas was injected from the bottom (gas-liquid ratio 1:3); The liquid phase product was heated to 50±2℃ by a heat exchanger (to enhance volatility); During the gas rising process, organic acids were "stripped" from the liquid phase to form acid vapor mixture; Acid mist capture: The tower top exhaust gas (containing H2 + organic acid vapor) passed through an acid mist collector (Φ25mm ceramic Laxi ring, height-diameter ratio 3:1), which captured >90% of the acid mist.

[0033] pH adjustment: The liquid phase product after acid removal entered the pH adjustment tank, and NaHCO3, corn syrup 0.5 g / L, and MgCl2 10 mg / L were added to adjust the pH to 7.0-7.5.

[0034] 4. Photofermentation for hydrogen production Photosynthetic conversion: the liquid phase product after pH adjustment was pumped into a photosynthetic reactor (30±1℃), inoculated with photosynthetic hydrogen-producing bacteria, and used organic acids for photosynthesis to produce high-purity hydrogen gas (photofermentation gas, H2 > 95%, CO2 < 5%); Gas pressurization: photofementation gas is pressurized to 0.03 MPa by Roots blower (0.01 MPa lower than the outlet pressure of dry desulfurization tower).

[0035] 5. Gas integration purification Gas-water separation: after removing H2S by dry desulfurization tower, after removing acid mist by acid mist catcher, and after pressurization by Roots blower, the dark fermentation main road gas, the gas stripping deacidification tower exhaust gas, and the photofementation gas enter the gas-water separator to remove water mist in the gas; Mixing and pressure equalization: the gas after removing water mist enters the mixing buffer tank to equalize the gas pressure and balance the flow fluctuation; Membrane separation: the gas after pressure equalization by the mixing buffer tank enters the PTFE membrane separator (H2 permeation rate > 95%) for membrane separation; Alkaline washing: the permeated gas (H2 > 90%) enters the alkaline washing tower (5% NaOH circulation) to absorb residual CO2 and H2S, and produces hydrogen gas with a purity of > 99.5%.

[0036] 6. Hydrogen storage and leakage monitoring Hydrogen storage: the purified hydrogen gas is input into the hydrogen storage tank 101; Leakage monitoring: the leakage monitoring unit monitors the hydrogen storage tank 101 in real time, and when hydrogen leakage is detected in the hydrogen storage tank 101, an alarm is given through the leakage alarm module.

[0037] During monitoring, the driving flow fan 205 continuously draws air from bottom to top, so that an air flow from bottom to top can be formed in the tank cylinder 201. The top tank air inlet net cylinder 210 not only serves as a support for the hydrogen storage tank 101, but also allows air to enter the tank cylinder 201 from the bottom of the tank cylinder 201, so that the air flow can be smoothly formed. The air flow will eventually be discharged outward through the exhaust pipe 206. When the air flow passes through the exhaust pipe 206, the hydrogen sensor 208 will monitor the hydrogen concentration in the air flow in real time. If there is a leakage in the hydrogen storage tank 101, the hydrogen concentration will abnormally increase, so that the leakage of the hydrogen storage tank 101 can be found according to the hydrogen concentration data monitored by the hydrogen sensor 208; In addition, the inlet pipe 102 needs to be connected to the outlet of the alkaline scrubbing tower through a gas transmission pipeline, and the outlet pipe 103 needs to be connected to hydrogen-using equipment or hydrogen application systems through a gas transmission pipeline. The connection between the inlet pipe 102, the outlet pipe 103 and the gas transmission pipeline is also prone to leakage. The inlet conduit 202 and the outlet conduit 203 can play a guiding role. Under the action of the flow-driving fan 205, the connection between the inlet pipe 102, the outlet pipe 103 and the gas transmission pipeline will form an airflow from the outside of the tank cylinder 201 to the inside of the tank cylinder 201, and the airflow will eventually flow to the exhaust pipe 206. Therefore, if there is a leakage at the connection between the inlet pipe 102 or the outlet pipe 103 and the gas transmission pipeline, it will also cause an abnormal increase in hydrogen concentration. This leakage can be detected based on the hydrogen concentration data monitored by the hydrogen sensor 208, so that the leakage monitoring unit can comprehensively monitor the leakage of the hydrogen storage tank 101. The analysis and leak detection module has a preset real-time concentration threshold. The hydrogen concentration data monitored by the hydrogen sensor 208 will be transmitted to the analysis and leak detection module in real time. When the hydrogen concentration exceeds the real-time concentration threshold, the analysis and leak detection module will control the leak alarm module to issue an alarm. Therefore, the hydrogen production device in this application can efficiently convert high-concentration organic wastewater into high-purity hydrogen, realizing the transformation of waste into treasure. Moreover, the leakage monitoring unit can perform comprehensive real-time monitoring of the hydrogen storage unit based on the active airflow guidance mechanism. Whether it is the hydrogen storage container itself or the connection point of the gas pipeline connected to the outside, once a hydrogen leak occurs, it can be detected and alarmed in time, significantly improving the safety of the hydrogen production process.

[0038] Second implementation method: Figures 6-8 This invention discloses a hydrogen production device for high-concentration organic wastewater. Unlike the first embodiment, the leak monitoring unit further includes a precision control module, and the tank monitoring mechanism further includes a pressure gas precision component. The pressure gas precision component includes a pressure cylinder 301 and a solenoid valve 302. A vertically downward-oriented electric push rod 303 is fixedly installed inside the pressure cylinder 301. The output end of the electric push rod 303 is fixedly connected to a pressure plate 304 that is slidably and sealingly connected to the pressure cylinder 301. Multiple exhaust holes 305 are evenly distributed in a ring on the side wall of the electric push rod 303. The pressure cylinder 301 is located above the exhaust pipe 206, and the top end of the exhaust pipe 206 is connected to the interior of the pressure cylinder 301. The solenoid valve 302 is located on the exhaust pipe 206 and below the hydrogen sensor 208. The precision control module is signal-connected to the flow fan 205, the solenoid valve 302, and the leak analysis module. The exhaust holes 305 are located below the pressure plate 304.

[0039] During monitoring, the electromagnetic valve 302 is in an open state, and the gas flow can flow into the air cylinder 301 through the exhaust pipe 206 and then be discharged to the outside of the air cylinder 301 through the exhaust hole 305, so that real-time monitoring of the hydrogen storage unit can be smoothly carried out. For the convenience of description, the monitoring when the inlet sleeve conduit 202 is in the starting state and the electromagnetic valve 302 is in the open state is referred to as daily real-time monitoring. During daily real-time monitoring, the analysis and leakage judgment module determines whether there is a hydrogen leakage phenomenon according to the hydrogen concentration data monitored by the hydrogen sensor 208 and the real-time concentration threshold value. The fine verification control module is preconfigured with a periodic parameter, and in this embodiment, the analysis and leakage judgment module is also preconfigured with a fine verification concentration threshold value. The fine verification control module will periodically perform the following fine verification operation according to the periodic parameter: Firstly, the fine verification control module will close the flow driving fan 205 and the exhaust pipe 206, and then the fine verification control module will control the electric push rod 303 to drive the air cylinder plate 304 to move downward, so that the air cylinder plate 304 moves to the lower side of the exhaust hole 305 and continues to move a certain distance (the total distance of the movement is preconfigured in the fine verification control module). After the exhaust hole 305 is moved, the fine verification control module sends a signal to the analysis and leakage judgment module, so that the analysis and leakage judgment module compares the hydrogen concentration data monitored by the hydrogen sensor 208 with the fine verification concentration threshold value. If the hydrogen concentration exceeds the fine verification concentration threshold value, the analysis and leakage judgment module will control the leakage alarm module to alarm. After the comparison is completed, the analysis and leakage judgment module sends a feedback signal to the fine verification control module, so that the fine verification control module controls the electric push rod 303 to drive the air cylinder plate 304 to move upward and reset, and opens the electromagnetic valve 302 and restarts the flow driving fan 205 to restore the daily real-time monitoring. When the hydrogen storage unit has a slight leakage phenomenon, due to the limitation of the monitoring accuracy of the hydrogen sensor 208, the analysis and leakage judgment module may not be able to discover it in time. However, during the fine verification, the air cylinder plate 304 continues to move after moving to the lower side of the exhaust hole 305, which compresses the air below it, i.e. the air located between the air cylinder 301 and the exhaust pipe 206 and between the air cylinder plate 304 and the electromagnetic valve 302 is compressed. Then, the hydrogen concentration in this part of the air will also increase accordingly. At this time, the hydrogen concentration data monitored by the hydrogen sensor 208 corresponds to the hydrogen concentration of this part of the air. Since the compressed air can increase the hydrogen concentration, the data can be amplified, and thus the slight leakage phenomenon of the hydrogen storage unit can be discovered in time. Therefore, through the joint setting of the air cylinder fine verification assembly and the fine verification control module, the fine verification control module can periodically perform fine verification operations, so that if the hydrogen storage unit has a slight leakage phenomenon, it can also be discovered and alarmed in time, thereby improving the accuracy and reliability of the hydrogen leakage monitoring and further improving the safety of the hydrogen production process.

[0040] The above-mentioned embodiments of the present application are combined with the current actual demand, the protection scope is not limited to this, various changes made within the knowledge range of the person skilled in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. A hydrogen production apparatus for high concentration organic wastewater, comprising a wastewater pretreatment unit, a hydrogen production unit, a gas purification unit, and a hydrogen storage unit, characterized in that, The leakage monitoring unit is further included; The wastewater pretreatment unit comprises a grid filter tank and a regulating tank for pretreating the wastewater; The hydrogen production unit comprises a dark fermentation module, a photo-fermentation module and an intermediate product transfer module, and hydrogen is produced by using the pretreated wastewater based on a two-step biological hydrogen production method; The gas purification unit comprises a gas-water separator, a mixing buffer tank, a PTFE membrane separator and an alkali scrubbing tower connected in sequence, and is used for purifying the hydrogen produced by the hydrogen production unit; The hydrogen storage unit comprises a hydrogen storage tank (101) for storing the purified hydrogen, and an inlet pipe (102) and an outlet pipe (103) are arranged on the side wall of the hydrogen storage tank (101). The leakage monitoring unit comprises a storage tank monitoring mechanism, the storage tank monitoring mechanism comprises a tank cover cylinder (201) covering the hydrogen storage tank (101), an inlet sleeve pipe (202) and an outlet sleeve pipe (203) are arranged on the side wall of the tank cover cylinder (201) and matched with the inlet pipe (102) and the outlet pipe (103) respectively, a collecting cylinder (204) is communicated with the top end of the tank cover cylinder (201), a flow driving fan (205) is fixedly installed in the collecting cylinder (204), an exhaust pipe (206) is communicated with the top end of the flow driving fan (205), a supporting net (207) is fixedly installed in the exhaust pipe (206), a hydrogen sensor (208) is fixedly installed at the bottom end of the supporting net (207), a top tank inlet net cylinder (210) is fixedly installed at the top end of a supporting seat (209) arranged below the tank cover cylinder (201), and the top end of the top tank inlet net cylinder (210) penetrates through the bottom end outer wall of the tank cover cylinder (201) and extends to be fixedly connected with the bottom end of the hydrogen storage tank (101).

2. The hydrogen generation device for high concentration organic wastewater according to claim 1, characterized by, The inlet sleeve pipe (202) is sleeved outside the inlet pipe (102), and the inlet pipe (102) extends to outside the tank cover cylinder (201) through the inlet sleeve pipe (202), the outlet sleeve pipe (203) is sleeved outside the outlet pipe (103), and the outlet pipe (103) extends to outside the tank cover cylinder (201) through the outlet sleeve pipe (203), the bottom end of the collecting cylinder (204) is open, and the top tank inlet net cylinder (210) has a porous net structure.

3. The hydrogen generation device for high concentration organic wastewater according to claim 2, characterized by, The leakage monitoring unit further comprises an analysis and leakage judgment module and a leakage alarm module, the hydrogen sensor (208) is signal connected with the analysis and leakage judgment module, and the analysis and leakage judgment module is signal connected with the leakage alarm module.

4. The hydrogen generation device for high concentration organic wastewater according to claim 1, characterized by, The dark fermentation module comprises an anaerobic fermentation reactor, and hydrogen is produced by anaerobic hydrogen-producing bacteria; The intermediate product transfer module comprises a gas stripping acid removal tower and a pH adjusting tank; The photo-fermentation module comprises a photosynthetic reactor, and hydrogen is further produced by photosynthetic hydrogen-producing bacteria.

5. The hydrogen generation device for high concentration organic wastewater according to claim 4, characterized by The anaerobic fermentation reactor is provided with a double-outlet pipeline, the double-outlet pipeline comprises a main outlet pipe and a shunt outlet pipe, the shunt outlet pipe is connected with the gas inlet of the gas stripping acid removal tower through a shunt valve, and the gas outlet of the gas stripping acid removal tower is connected with the gas-water separator through an acid mist collector.

6. The hydrogen generation device for high concentration organic wastewater according to claim 5, characterized in that, The gas purification unit further comprises a dry desulfurization tower and a Roots blower, an air inlet of the dry desulfurization tower is connected with a main gas outlet pipe of the anaerobic fermentation reactor, an air inlet of the Roots blower is connected with a gas outlet of the photo-fermentation reactor, and air outlets of the dry desulfurization tower and the Roots blower are connected with a gas-water separator.

7. The hydrogen generation device for high concentration organic wastewater according to claim 3, characterized by The leakage monitoring unit further comprises a precision control module, and the storage tank monitoring mechanism further comprises a gas compression precision assembly, the gas compression precision assembly comprises a gas cylinder (301) and an electromagnetic valve (302), a vertical downward electric push rod (303) is fixedly installed in the gas cylinder (301), an output end of the electric push rod (303) is fixedly connected with a gas compression plate (304) in sliding sealing connection with the gas cylinder (301), and a plurality of exhaust holes (305) are formed in the side wall of the electric push rod (303) and are uniformly distributed in a ring shape.

8. The hydrogen generation device for high concentration organic wastewater according to claim 7, characterized by, The gas cylinder (301) is located above the exhaust pipe (206), the top end of the exhaust pipe (206) is in communication with the inside of the gas cylinder (301), the electromagnetic valve (302) is arranged on the exhaust pipe (206) and located below the hydrogen sensor (208), the precision control module is in signal connection with the flow driving fan (205), the electromagnetic valve (302) and the analysis and leakage judgment module, and the exhaust holes (305) are located below the gas compression plate (304).

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