A hydrogen production device for high-concentration organic wastewater

Abstract

The present application relates to a kind of hydrogen production device for high concentration organic wastewater applied to hydrogen production technical field, including wastewater pretreatment unit, hydrogen production unit, gas purification unit, hydrogen storage unit and leakage monitoring unit, wastewater pretreatment unit includes grid filter tank and adjusting tank, hydrogen production unit includes dark fermentation module, light fermentation module and intermediate product transfer module, gas purification unit includes gas-water separator, mixed buffer tank, PTFE membrane separator, lye washing tower, hydrogen storage unit includes hydrogen storage tank, and leakage monitoring unit includes tank monitoring mechanism;The hydrogen production device in the application can efficiently convert high concentration organic wastewater into high-purity hydrogen, realize waste treatment and waste into treasure, and the leakage monitoring unit can conduct real-time monitoring of the hydrogen storage unit in all directions based on the active airflow guiding mechanism.Once hydrogen leakage occurs, it can be discovered and alarmed in time, significantly improving the safety of the hydrogen production process.

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.

[0009] The wastewater pretreatment unit comprises a grid filter tank and an adjusting tank, which are used for pretreating the wastewater.

[0010] 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.

[0011] 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.

[0012] The hydrogen storage unit comprises a hydrogen storage tank used for storing the purified hydrogen, and the sidewall of the hydrogen storage tank is provided with an inlet pipe and an outlet pipe.

[0013] The leakage monitoring unit comprises a storage tank monitoring mechanism, which comprises a tank cover cylinder covering the hydrogen storage tank, and the sidewall of the tank cover 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 tank cover 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 end of the tank cover 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 tank cover cylinder and extends to be fixedly connected with the bottom end of the hydrogen storage tank.

[0014] 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.

[0015] As a further improvement of the application, the inlet sleeve pipe is sleeved on the outside of the inlet pipe, and the inlet pipe extends to the outside of the tank cover cylinder through the inlet sleeve pipe, the outlet sleeve pipe is sleeved on the outside of the outlet pipe, and the outlet pipe extends to the outside of the tank cover 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.

[0016] 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.

[0017] As a further improvement of the application, the dark fermentation module comprises an anaerobic fermentation reactor, and the hydrogen is preliminarily produced by anaerobic hydrogen-producing bacteria.

[0018] The intermediate product transfer module comprises a gas stripping acid removal tower and a pH adjusting tank.

[0019] The photo-fermentation module comprises a photosynthetic reactor, and hydrogen is further produced by photosynthetic hydrogen-producing bacteria.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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

[0025] Figure 1 FIG. 1 is a structural block diagram of a hydrogen production device according to a first embodiment of the present application;

[0026] Figure 2 Fig. 1 is a perspective view of a storage tank monitoring mechanism according to a first embodiment of the present application;

[0027] Figure 3 Fig. 2 is a cross-sectional view of a package tank cylinder according to the first embodiment of the present application;

[0028] Figure 4 Fig. 3 is a front view of the package tank cylinder according to the first embodiment of the present application;

[0029] Figure 5 Fig. 4 is a cross-sectional view of a collection cylinder according to the first embodiment of the present application;

[0030] Figure 6 Fig. 5 is a perspective view of a storage tank monitoring mechanism according to a second embodiment of the present application;

[0031] Figure 7 Fig. 6 is a cross-sectional view of a pressurizing cylinder according to the second embodiment of the present application;

[0032] Figure 8 Fig. 7 is a block diagram of a leakage monitoring unit according to the second embodiment of the present application.

[0033] Legend of reference numerals:

[0034] 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, pressurizing cylinder; 302, electromagnetic valve; 303, electric push rod; 304, pressurizing plate; 305, exhaust hole. DETAILED DESCRIPTION

[0035] The two embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] First embodiment:

[0037] Figures 1-5 Fig. 1 shows 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.

[0038] The wastewater pretreatment unit comprises a grid filter tank and an adjusting tank, and is used for pretreating the wastewater.

[0039] 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 the pretreated wastewater.

[0040] 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 prepared by the hydrogen production unit;

[0041] The hydrogen storage unit comprises a hydrogen storage tank 101 used for storing the hydrogen after purification, and the sidewall of the hydrogen storage tank 101 is provided with an inlet pipe 102 and an outlet pipe 103.

[0042] 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, the sidewall of the tank cover cylinder 201 is provided with an inlet sleeve conduit 202 and an outlet sleeve conduit 203 matched with the inlet pipe 102 and the outlet pipe 103 respectively, the top end of the tank cover 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 end of the tank cover 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, 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.

[0043] The inlet sleeve conduit 202 is sleeved on the outside of the inlet pipe 102, and the inlet pipe 102 extends to the outside of the tank cover cylinder 201 through the inlet sleeve conduit 202, the outlet sleeve conduit 203 is sleeved on the outside of the outlet pipe 103, and the outlet pipe 103 extends to the outside of the tank cover 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.

[0044] 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.

[0045] The dark fermentation module comprises an anaerobic fermentation reactor, and hydrogen is preliminarily produced by anaerobic hydrogen-producing bacteria;

[0046] The intermediate product transfer module comprises a gas stripping and acid removal tower and a pH adjusting tank.

[0047] The photo fermentation module comprises a photosynthetic reactor, and hydrogen is further produced by photosynthetic hydrogen-producing bacteria.

[0048] 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 and acid removal tower through a shunt valve, and the gas outlet of the gas stripping and acid removal tower is connected with the gas-water separator through an acid mist collector.

[0049] 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 the main gas outlet pipe of the anaerobic fermentation reactor, an air inlet of the Roots blower is connected with the gas outlet of the light fermentation reactor, and air outlets of the dry desulfurization tower and the Roots blower are connected with the gas-water separator.

[0050] The hydrogen production process of the hydrogen production device in the application is as follows:

[0051] 1. Wastewater pretreatment

[0052] Grid filtration: high-concentration organic wastewater (COD 8000-50000 mg / L) is intercepted by a grid filtration tank to remove suspended solids (SS>500 mg / L);

[0053] Homogeneous adjustment: the filtered wastewater enters an adjustment tank, is heated to 35-40 DEG C by a solar energy sandwich, pH is adjusted to 6.0-7.0 by adding acid / base, and stays for 2-4 hours.

[0054] 2. Dark fermentation hydrogen production

[0055] Anaerobic hydrogen production: the pretreated wastewater is pumped into an anaerobic fermentation reactor (35±1 DEG C), anaerobic fermentation hydrogen-producing bacteria are inoculated to decompose organic matter, and the following is produced:

[0056] Gas phase product: H2 (60-70%), CO2 (30-40%), and trace amount of H2S (50-200 ppm).

[0057] Liquid phase product: fermentation broth containing volatile fatty acids (VFA, acetic acid + butyric acid>8 g / L).

[0058] Gas shunting:

[0059] Main gas outlet pipe→dark fermentation main path gas (90-95% gas phase product)→dry desulfurization tower (H2S removal).

[0060] Shunt gas outlet pipe→dark fermentation branch gas (5-10% gas phase product)→shunt valve (decompression to 0.02 MPa)→input gas stripping acid removal tower.

[0061] 3. Intermediate product transfer

[0062] Gas stripping acid removal:

[0063] The dark fermentation liquid phase product enters the bottom of the gas stripping acid removal tower, and the dark fermentation branch gas is injected from the bottom (gas-liquid ratio 1:3);

[0064] The liquid phase product is heated to 50±2 DEG C by a heat exchanger (to strengthen volatility);

[0065] Organic acids are "stripped" from the liquid phase during the gas rising process, forming acid vapor mixed gas;

[0066] Acid mist capture:

[0067] The overhead exhaust gas (containing H2+ organic acid vapor) is captured by an acid mist trap (Φ25mm ceramic Rasai ring, height-diameter ratio 3:1) to capture >90% of the acid mist.

[0068] pH adjustment:

[0069] The deacidified liquid phase product enters the pH adjustment tank, and NaHCO3, corn syrup 0.5g / L, and MgCl210mg / L are added to adjust the pH to 7.0-7.5.

[0070] 4. Photofermentation hydrogen production

[0071] Photosynthesis: The liquid phase product after pH adjustment is pumped into a photosynthetic reactor (30±1℃), inoculated with photosynthetic hydrogen-producing bacteria, and organic acids are used for photosynthesis to produce high-purity hydrogen gas (photofermentation gas, H2>95%, CO2<5%);

[0072] Gas pressurization: The photofermentation gas is pressurized to 0.03MPa by a Roots blower (0.01MPa lower than the outlet pressure of the dry desulfurization tower).

[0073] 5. Gas integration purification

[0074] Gas-water separation: The dark fermentation main road gas after H2S removal by the dry desulfurization tower, the gas stripping deacidification tower exhaust gas after acid mist capture, and the photofermentation gas after pressurization by the Roots blower enter the gas-water separator to remove water mist in the gas;

[0075] Mixing and pressure equalization: The gas after removal of water mist enters the mixing buffer tank to equalize the gas pressure and balance the flow fluctuation;

[0076] Membrane separation: The gas after pressure equalization by the mixing buffer tank enters the PTFE membrane separator (H2transmission rate >95%) for membrane separation;

[0077] Alkaline washing: The permeated gas (H2>90%) enters the alkaline washing tower (5% NaOH circulation) to absorb residual CO2 and H2S, producing hydrogen gas with a purity of >99.5%.

[0078] 6. Hydrogen storage and leakage monitoring

[0079] Hydrogen storage: The purified hydrogen gas is input into the hydrogen storage tank 101;

[0080] 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.

[0081] When monitoring, the driving fan 205 continuously draws air from bottom to top, so that an air flow from bottom to top can be formed in the bag can cylinder 201, the top can air inlet net cylinder 210 not only can support the hydrogen storage tank 101, but also enables air to enter the bag can cylinder 201 from the bottom of the bag can cylinder 201, so that the air flow can be formed smoothly, and the air flow is finally discharged outward through the exhaust pipe 206. When the air flow flows through the exhaust pipe 206, the hydrogen sensor 208 can monitor the hydrogen concentration in the air flow in real time. If the hydrogen storage tank 101 has a leakage phenomenon, 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.

[0082] In addition, the air inlet pipe 102 needs to be connected to the air outlet of the lye washing tower through a gas conveying pipeline, and the air outlet pipe 103 needs to be connected to a hydrogen equipment or a hydrogen application system through a gas conveying pipeline. The connection positions of the air inlet pipe 102 and the air outlet pipe 103 with the gas conveying pipeline are also prone to leakage. The inlet sleeve conduit 202 and the outlet sleeve conduit 203 can play a flow guiding role. Under the action of the driving fan 205, the connection positions of the air inlet pipe 102 and the air outlet pipe 103 with the gas conveying pipeline can form an air flow from the outside of the bag can cylinder 201 to the inside of the bag can cylinder 201, and the air flow finally flows to the exhaust pipe 206. Therefore, if the connection positions of the air inlet pipe 102 and the air outlet pipe 103 with the gas conveying pipeline have a leakage phenomenon, the hydrogen concentration will also abnormally increase, so that the leakage phenomenon can be found according to the hydrogen concentration data monitored by the hydrogen sensor 208, and the leakage monitoring unit can comprehensively monitor the leakage of the hydrogen storage tank 101.

[0083] The analysis and leakage judgment module is preconfigured with a real-time concentration threshold value. The hydrogen concentration data monitored by the hydrogen sensor 208 is transmitted to the analysis and leakage judgment module in real time. When the hydrogen concentration exceeds the real-time concentration threshold value, the analysis and leakage judgment module controls the leakage alarm module to alarm.

[0084] Therefore, the hydrogen production device in the application can efficiently convert high-concentration organic wastewater into high-purity hydrogen, realize waste treatment and waste-to-resource, and the leakage monitoring unit can comprehensively and real-timely monitor the hydrogen storage unit based on the active air flow guiding mechanism. No matter the hydrogen storage container itself or the connection position of the gas conveying pipeline connected to the outside, once hydrogen leakage occurs, it can be found and alarmed in time, which significantly improves the safety of the hydrogen production process.

[0085] The second embodiment is as follows:

[0086] Figures 6-8The application discloses a hydrogen production device for high-concentration organic wastewater. Different from the first embodiment, the leakage monitoring unit further comprises a precision control module, and the tank monitoring mechanism further comprises a gas compression precision assembly. The gas compression precision assembly comprises a gas compression cylinder 301 and an electromagnetic valve 302. The gas compression cylinder 301 is fixedly provided with an electric push rod 303 arranged vertically downwards. The output end of the electric push rod 303 is fixedly connected with a gas compression plate 304 in sliding sealing connection with the gas compression cylinder 301. 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. The gas compression cylinder 301 is located above the exhaust pipe 206, and the top end of the exhaust pipe 206 is in communication with the inside of the gas compression cylinder 301. The electromagnetic valve 302 is arranged on the exhaust pipe 206 and is 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. The exhaust holes 305 are located below the gas compression plate 304.

[0087] During monitoring, the electromagnetic valve 302 is in an open state, and airflow can flow into the gas compression cylinder 301 through the exhaust pipe 206 and then be discharged to the outside of the gas compression cylinder 301 through the exhaust holes 305, so that real-time monitoring of the hydrogen storage unit can be smoothly performed. In order to facilitate description, monitoring when the inlet sleeve conduit 202 is in a starting state and the electromagnetic valve 302 is in an open state is referred to as daily real-time monitoring. During daily real-time monitoring, the analysis and leakage judgment module judges whether there is a hydrogen leakage phenomenon according to the hydrogen concentration data monitored by the hydrogen sensor 208 and a real-time concentration threshold value.

[0088] The precision control module is provided with a period parameter, and in the embodiment, the analysis and leakage judgment module is further provided with a precision concentration threshold value. The precision control module can periodically execute the following precision verification operation according to the period parameter.

[0089] Firstly, the precision control module can close the flow driving fan 205 and the exhaust pipe 206. Then, the precision control module can control the electric push rod 303 to drive the gas compression plate 304 to move downwards, so that the gas compression plate 304 moves to below the exhaust holes 305 and continues to move for a certain distance (the total distance of movement is pre-set in the precision control module). After the exhaust holes 305 are moved, the precision control module can send 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 precision concentration threshold value. If the hydrogen concentration exceeds the precision concentration threshold value, the analysis and leakage judgment module can control the leakage alarm module to alarm. After comparison, the analysis and leakage judgment module can send a feedback signal to the precision control module, so that the precision control module controls the electric push rod 303 to drive the gas compression plate 304 to move upwards and reset, and opens the electromagnetic valve 302 and restarts the flow driving fan 205, so as to restore daily real-time monitoring.

[0090] 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, but during the accurate verification, the continued movement of the air compression plate 304 after moving to the lower side of the exhaust hole 305 will compress the air below, that is, the air between the air cylinder 301 and the exhaust pipe 206 and between the air compression plate 304 and the electromagnetic valve 302 will be compressed, and 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, and since the compressed air can increase the hydrogen concentration, the data can be amplified, and then the slight leakage phenomenon of the hydrogen storage unit can be discovered in time;

[0091] Therefore, through the joint setting of the air compression verification assembly and the verification control module, the verification control module can periodically perform accurate verification operation, so that if the hydrogen storage unit has a slight leakage phenomenon, it can also be discovered and alarmed in time, and then the accuracy and reliability of the hydrogen leakage monitoring can be improved, and the safety of the hydrogen production process can be further improved.

[0092] In combination with the current actual needs, the protection scope of the above-mentioned embodiments of the present application is not limited thereto, various changes made within the knowledge range of those 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 device 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, It also includes a leak detection unit; The wastewater pretreatment unit includes a bar screen filter tank and a regulating tank, used for pretreatment of wastewater; The hydrogen production unit includes a dark fermentation module, a photofermentation module, and an intermediate product transfer module. Based on a two-step biological hydrogen production method, hydrogen is produced from pretreated wastewater. The gas purification unit includes a gas-liquid separator, a mixing buffer tank, a PTFE membrane separator, and an alkaline scrubbing tower connected in sequence, used to purify the hydrogen produced by the hydrogen production unit. The hydrogen storage unit includes a hydrogen storage tank (101) for storing purified hydrogen, and an inlet pipe (102) and an outlet pipe (103) are provided on the side wall of the hydrogen storage tank (101). The leakage monitoring unit includes a tank monitoring mechanism, which includes a tank casing (201) covering the hydrogen storage tank (101). The side wall of the tank casing (201) is provided with an inlet pipe (202) and an outlet pipe (203) respectively matching the inlet pipe (102) and the outlet pipe (103). The top of the tank casing (201) is connected to a collecting cylinder (204). A flow-driving fan (205) is fixedly installed inside the collecting cylinder (204). The top of the flow-driving fan (205)... An exhaust pipe (206) is connected to the end of the tank. A support net (207) is fixedly installed inside the exhaust pipe (206). A hydrogen sensor (208) is fixedly installed at the bottom end of the support net (207). A support base (209) is provided below the tank cylinder (201). A top tank inlet mesh cylinder (210) is fixedly installed at the top end of the support base (209). The top end of the top tank inlet mesh cylinder (210) penetrates the bottom outer wall of the tank cylinder (201) and extends to be fixedly connected to the bottom end of the hydrogen storage tank (101). The leak monitoring unit also includes a leak analysis and detection module and a leak alarm module. The hydrogen sensor (208) is connected to the leak analysis and detection module, and the leak analysis and detection module is connected to the leak alarm module. The leakage monitoring unit also includes a precision control module, and the tank monitoring mechanism also includes a pressure gas precision testing component. The pressure gas precision testing 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 evenly distributed vents are provided on the side wall of the electric push rod (303). Vent (305); The compressor cylinder (301) is located above the exhaust pipe (206), and the top of the exhaust pipe (206) is connected to the interior of the compressor cylinder (301). The solenoid valve (302) is located on the exhaust pipe (206), and the solenoid valve (302) is located below the hydrogen sensor (208). The precision control module is signal connected to the flow fan (205), the solenoid valve (302), and the analysis and leak detection module. The vent (305) is located below the compressor plate (304). The dark fermentation module includes an anaerobic fermentation reactor, which performs preliminary hydrogen production through anaerobic fermentation of hydrogen-producing bacteria. The anaerobic fermentation reactor is equipped with dual outlet pipelines, which include a main outlet pipeline and a branch outlet pipeline. The branch outlet pipeline is connected to the inlet of the gas stripping deacidification tower through a branch valve, and the exhaust port of the gas stripping deacidification tower is connected to a gas-liquid separator through an acid mist collector.

2. The hydrogen production device for high-concentration organic wastewater according to claim 1, characterized in that, The inlet conduit (202) is sleeved on the outside of the inlet pipe (102), and the inlet pipe (102) extends through the inlet conduit (202) to the outside of the outer can casing (201). The outlet conduit (203) is sleeved on the outside of the outlet pipe (103), and the outlet pipe (103) extends through the outlet conduit (203) to the outside of the outer can casing (201). The bottom end of the collecting cylinder (204) is set to be open. The top can inlet air mesh cylinder (210) is a porous mesh structure.

3. The hydrogen production device for high-concentration organic wastewater according to claim 1, characterized in that, The intermediate product transfer module includes an air stripping deacidification tower and a pH adjustment tank; The photo-fermentation module includes a photosynthetic reactor, which uses photosynthetic hydrogen-producing bacteria to produce hydrogen in a secondary process.

4. A hydrogen production device for high-concentration organic wastewater according to claim 1, characterized in that, The gas purification unit also includes a dry desulfurization tower and a Roots blower. The inlet of the dry desulfurization tower is connected to the main outlet pipe of the anaerobic fermentation reactor, and the inlet of the Roots blower is connected to the outlet of the photo-fermentation reactor. The outlets of both the dry desulfurization tower and the Roots blower are connected to a gas-water separator.

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