Novel air purifying and humidifying system suitable for proton membrane hydrogen fuel cell

Abstract

According to the novel air purification and humidification system suitable for the proton membrane hydrogen fuel cell, pressurized air is arranged on the input side of an air purification and humidification device, a liquid inlet of the air purification and humidification device is connected with an alkali liquor tank and demineralized water, and the air outlet side of the air purification and humidification device is connected with the hydrogen fuel cell; and the output end of the hydrogen fuel cell enters the power utilization terminal through the inversion boosting device. The air purifying and humidifying device comprises a tank body, an air outlet is formed in the top of the tank body, an air inlet is formed in the lower portion of the tank body, and the air inlet is connected with a bottom mother branch pipe type air inlet device. A supporting layer grid is arranged above the bottom mother branch pipe type air inlet device, and polyhedral plastic hollow balls are arranged in alkali liquor above the supporting layer grid; an alkali liquor inlet and a water inlet are formed in the upper part of the tank body. According to the air purifier, the effect of purifying harmful gas and dust particles in the air and the effect of humidifying the air are achieved; an existing proton membrane hydrogen fuel cell air humidifying system is omitted, and the energy consumption of a fuel cell system is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of hydrogen energy power generation, and specifically relates to a novel air purification and humidification system suitable for proton membrane hydrogen fuel cells. Background Art

[0002] At present, in order to ensure that the platinum-based catalyst in the membrane electrode of proton membrane hydrogen fuel cells maintains good activity and avoids corrosion, the cathode air intake system of proton membrane hydrogen fuel cells mostly uses multi-layer media filtration + activated carbon adsorption to purify the air to remove particulate dust and acidic harmful gases such as SO2 and NOx in the air entering the hydrogen fuel cell system; to ensure that the proton exchange membrane has sufficient humidity to reduce the proton conduction impedance within the membrane and improve the power generation efficiency of the fuel cell, a humidification system (humidification water pump and humidification device) must be installed in the air pipeline after pressurization to humidify the air. "Schematic diagram of a typical proton membrane hydrogen fuel cell air purification and humidification system" is attached. Figure 1 shown.

[0003] However, the aforementioned air purification systems can only remove dust particles and a small amount of harmful gases (such as SO2, NOx, and H2S) that are sensitive to activated carbon adsorption. These systems are primarily suitable for hydrogen fuel cell air purification systems for vehicles operating in relatively benign environments and with installed capacity below 300kW. With the development of large-scale stationary hydrogen fuel cell power generation and hydrogen energy storage, the volume of cathode air intake for large-capacity, MW-class and above, stationary hydrogen fuel cell power generation systems deployed in industrial parks, especially chemical parks, has increased exponentially. The concentration of harmful gases in the air is higher and the composition is more complex (commonly SO2, NOx, HCl, and H2S). Activated carbon has weak and limited adsorption capacity for certain gases (such as HCl). This results in suboptimal treatment performance for existing media filtration plus activated carbon adsorption systems, leading to corrosion of the hydrogen fuel cell stack and shortened replacement cycles for the purification system's filter and adsorption packing, significantly increasing operating costs. Furthermore, air humidification devices increase system investment and operating energy consumption. Utility Model Content

[0004] The technical problem to be solved by this utility model is that conventional, large-capacity, fixed hydrogen fuel cell air purification and treatment systems (MW-class and above) deployed in industrial parks, especially chemical parks, suffer from unsatisfactory operating performance, fuel cell corrosion, catalyst poisoning, short replacement cycles for purification system filter and adsorption fillers, high operating costs, and additional energy consumption by the intake humidification system. This utility model provides a novel air purification and humidification system that replaces existing air purification devices using multi-layer media filtration and activated carbon adsorption, achieving low-cost and high-efficiency purification and removal of harmful gases (SO2, NOx, HCL, H2S, etc.) and dust particles from the air. It also eliminates the existing proton membrane hydrogen fuel cell air humidification system, reducing the energy consumption of the fuel cell system.

[0005] A novel air purification and humidification system suitable for a proton membrane hydrogen fuel cell includes an air purification and humidification device, the input side of the air purification and humidification device is pressurized air, and the liquid inlet of the air purification and humidification device is respectively connected to an alkaline liquid tank and desalted water, the air outlet side of the air purification and humidification device is connected to a hydrogen fuel cell, and the output end of the hydrogen fuel cell enters the power terminal through an inverter boost device.

[0006] The air purification and humidification device includes a tank body, which contains alkali solution. An air outlet is arranged on the top of the tank body, and an air inlet is arranged on the lower part of the tank body, and the air inlet is connected to the bottom mother branch pipe type air intake device; a supporting layer grille is arranged above the bottom mother branch pipe type air intake device, and a multi-faceted plastic hollow ball is arranged in the alkali solution above the supporting layer grille; an alkali solution inlet and a water inlet are arranged on the upper part of the tank body.

[0007] The bottom mother branch pipe type air intake device includes a main air intake pipe, which is connected to a plurality of branch pipes, and a plurality of air holes are provided on the main air intake pipe and the branch pipes.

[0008] The diameter of the multi-faceted plastic hollow ball is φ40mm, and the aperture of the supporting layer grid is φ30mm.

[0009] The alkali solution is 30% NaOH solution.

[0010] The tank body is provided with an analytical instrument measuring port, and the analytical instrument includes any one or a combination of a pH meter, a turbidity meter, and a liquid level meter.

[0011] A sewage outlet is provided at the bottom of the tank body, and the sewage outlet is connected to the waste liquid collection container through a sewage pipe.

[0012] The alkali liquid inlet is connected to the alkali liquid inlet pipe, and an automatic alkali inlet valve is provided on the alkali liquid inlet pipe; the water inlet is connected to the water inlet pipe, and an automatic water inlet valve is provided on the water inlet pipe; the sewage pipe of the sewage outlet is provided with an automatic sewage discharge valve; the above-mentioned automatic alkali inlet valve, automatic water inlet valve and automatic sewage discharge valve are all connected to the control system.

[0013] The utility model adopts the above technical solution to achieve low-cost and high-efficiency purification of harmful gases (SO2, NOx, HCL, H2S, etc.) and dust particles in the air and air humidification effect; eliminates the existing proton membrane hydrogen fuel cell air humidification system and reduces the energy consumption of the fuel cell system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the prior art;

[0015] Figure 2 This is the system principle diagram of the utility model;

[0016] Figure 3 This is a structural diagram of the air purification and humidification device;

[0017] Figure 4 for Figure 3 Middle AA section view;

[0018] Figure 5 This is the process system diagram of this utility model. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 2 、 Figure 5 As shown, a new air purification and humidification system suitable for proton membrane hydrogen fuel cells includes an air purification and humidification device 21, the input side of the air purification and humidification device is pressurized air, and the liquid inlet of the air purification and humidification device 21 is respectively connected to the alkali liquid tank 24 and the desalted water 25, and the air outlet side of the air purification and humidification device 21 is connected to the hydrogen fuel cell 26, and the output end of the hydrogen fuel cell 26 enters the power terminal through the inverter boost device.

[0021] Specifically, the air intake side of the air purification and humidification device 21 is connected to the air compressor 23 through the air intake pipe 22, and the air intake pipe 22 is provided with a temperature meter TT, a pressure gauge PIA and a flow meter FIQ.

[0022] It should be noted that in order to ensure the normal operation of the hydrogen fuel cell, the air inlet side of the hydrogen fuel cell is connected to the hydrogen tank, and the air outlet side outputs tail exhaust.

[0023] This utility model designs a new type of air purification and humidification device based on the acid-base neutralization chemical reaction principle of strong alkaline solution (such as NaOH solution) and acidic gas (SO2, NOx, HCL, H2S, etc.). Figure 3 By passing the pressurized air to be purified into a certain concentration of alkaline solution and evenly aerating it, the three major goals of fully reacting and absorbing the acidic gas in the air and the alkaline solution, fully dissolving and absorbing the dust particles and the water solvent, and humidifying the exhaust gas are achieved, replacing the existing hydrogen fuel cell system's filtration + adsorption air purification system and air humidification system.

[0024] like Figure 3 As shown, the air purification and humidification device 21 includes a tank body 1, which contains an alkaline solution 3. An air outlet 2 is provided at the top of the tank body 1, and an air inlet 8 is provided at the bottom of the tank body 1. The air inlet 8 is connected to the bottom female branch-type air inlet device 9. A support layer grille 7 is provided above the bottom female branch-type air inlet device 9. Multi-faceted plastic hollow balls 6 are placed in the alkaline solution 3 above the support layer grille 7. In addition, an alkaline solution inlet 4 and a water inlet 5 are provided at the top of the tank body 1.

[0025] Furthermore, if Figure 4 As shown, the bottom mother branch pipe type air intake device 9 includes a main air intake pipe 91, which is connected to multiple branch pipes 92. A plurality of air holes 93 are provided on the main air intake pipe 91 and the branch pipes 92.

[0026] Furthermore, the diameter of the multi-faceted plastic hollow ball 6 is φ40 mm, and the aperture of the supporting layer grid 7 is φ30 mm.

[0027] Furthermore, the alkali solution 3 is a 30% NaOH solution.

[0028] Furthermore, an analytical instrument measuring port 10 is provided on the tank body 1 , and the analytical instrument includes any one or a combination of a pH meter, a turbidity meter, and a liquid level meter.

[0029] Furthermore, a sewage outlet 11 is provided at the bottom of the tank body 1 , and the sewage outlet 11 is connected to a waste liquid collection container 12 through a sewage pipe.

[0030] Furthermore, the alkali solution inlet 4 is connected to the alkali solution inlet pipe, and an automatic alkali inlet valve 13 is provided on the alkali solution inlet pipe; the water inlet 5 is connected to the water inlet pipe, and an automatic water inlet valve 14 is provided on the water inlet pipe; the sewage pipe of the sewage outlet 11 is provided with an automatic sewage discharge valve 15; the above-mentioned automatic alkali inlet valve 13, automatic water inlet valve 14 and automatic sewage discharge valve 15 are all connected to the control system.

[0031] It should be noted that, in the present invention, the tank body 1, the bottom main branch pipe type air intake device 9, etc. are all made of alkali corrosion-resistant carbon steel, stainless steel, various plastics (PE, PP, PTEE, etc.) or fiberglass.

[0032] The implementation method of the present utility model is:

[0033] (1) Determine the cathode intake air flow rate Q (Nm) of the hydrogen fuel cell based on the hydrogen fuel cell system parameters and performance curve 3 / h), and then determine the parameters of the air purification and humidification device: air inlet DNA, air outlet DNB, purification and humidification device diameter F (if necessary, it can be determined by experimental simulation);

[0034] (2) Based on the composition and maximum possible concentration of acidic gases in the ambient air and the kinetics of the neutralization reaction between acidic gases and alkali solution, determine the contact reaction time between acidic gases in the air and alkali solution, the alkali solution filling height H in the purification and humidification device, and the filling density of the polyhedral hollow spheres (which can be determined through experimental simulation if necessary);

[0035] (3) Based on the hydrogen fuel cell cathode air intake flow rate Q and the acid gas composition and maximum possible concentration in the ambient air, combined with the hydrogen fuel cell cathode intake humidity requirements, comprehensively determine the water and alkali addition parameters of the air purification and humidification device (which can be determined through experimental simulation if necessary) and the corresponding interface specifications;

[0036] (4) The main structural dimensions and interface specifications of the air purification and humidification device determined according to the above steps.

[0037] The operation control method of the utility model is:

[0038] (1) Turbidity control: With the continuous operation of the system, dust particles and other suspended solids in the air are intercepted by the water vapor in the air purification and humidification device 21 and dissolved in the alkali solution 3, resulting in an increase in the turbidity of the alkali water, which in turn affects the further dissolution and absorption of dust particles in the air. At this time, the turbidity of the alkali water is monitored in real time by the turbidity meter installed in the system and the relevant valves are controlled in a chain manner: when the turbidity exceeds the system set value (determined by debugging or experiment), the automatic sewage discharge valve 15 is opened to discharge sewage (mainly to discharge the suspended solid solution after absorbing dust particles in the air), and the automatic water inlet valve 14 is opened at the same time to replenish water to reduce the turbidity of the alkali solution;

[0039] (2) pH value control: With the continuous operation of the system, the acidic gas in the air reacts with the alkali solution in the purification and humidification device to neutralize, causing the pH value of the alkali solution to drop, which in turn affects the further neutralization reaction of the pickling gas with the alkali solution. At this time, the alkalinity of the alkali water is monitored in real time through the pH meter set in the system and the relevant valves are controlled in a chain manner: when the pH is lower than the system set value (determined by debugging or experiment, tentatively set to 8), the sewage automatic valve 15 is opened to discharge sewage (mainly to discharge the salt product of the neutralization reaction), and the alkali automatic valve 13 is opened at the same time to add alkali to increase the pH value of the absorption liquid;

[0040] (3) Liquid level control: With the continuous operation of the system, the alkaline water in the air purification and humidification device 21 is carried out by the air to the subsequent hydrogen fuel cell cathode air intake system, causing the alkaline liquid level in the purification and humidification device to drop. At the same time, since the turbidity control and pH value control links both need to discharge sewage, the alkaline liquid level in the purification and humidification device also drops, which in turn affects the further absorption of dust particles and acidic gases in the air. At this time, the alkaline water level is monitored in real time through the liquid level meter installed in the system and the relevant valves are controlled in a chain manner: when the liquid level is lower than the set value (determined by debugging or experiment), the water inlet automatic valve 14 is opened to replenish water to maintain the alkaline liquid level in the air purification and humidification device.

[0041] Finally, it should be noted that the above 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 aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel air purification and humidification system suitable for proton membrane hydrogen fuel cells, characterized by: The invention comprises an air purification and humidification device (21), wherein the input side of the air purification and humidification device is pressurized air, and the liquid inlet of the air purification and humidification device (21) is respectively connected to the alkali liquid tank (24) and the desalted water (25), and the air outlet side of the air purification and humidification device (21) is connected to the hydrogen fuel cell (26), and the output end of the hydrogen fuel cell (26) enters the power terminal through the inverter boost device.

2. A novel air purification and humidification system suitable for a proton membrane hydrogen fuel cell according to claim 1, characterized in that: The air purification and humidification device (21) comprises a tank body (1), wherein the tank body (1) contains alkali solution (3), an air outlet (2) is provided at the top of the tank body (1), an air inlet (8) is provided at the bottom of the tank body (1), and the air inlet (8) is connected to a bottom mother branch pipe type air inlet device (9); a support layer grille (7) is provided above the bottom mother branch pipe type air inlet device (9), and a multi-faceted plastic hollow ball (6) is provided in the alkali solution (3) above the support layer grille (7); and an alkali solution inlet (4) and a water inlet (5) are provided at the upper part of the tank body (1).

3. The novel air purification and humidification system suitable for proton membrane hydrogen fuel cells according to claim 2 is characterized in that: The bottom mother branch pipe type air intake device (9) comprises a main air intake pipe (91), the main air intake pipe (91) is connected to a plurality of branch pipes (92), and a plurality of air holes (93) are provided on the main air intake pipe (91) and the branch pipes (92).

4. The novel air purification and humidification system suitable for proton membrane hydrogen fuel cells according to claim 2 is characterized in that: The diameter of the multifaceted plastic hollow ball (6) is φ40 mm, and the aperture of the support layer grid (7) is φ30 mm.

5. The novel air purification and humidification system suitable for proton membrane hydrogen fuel cells according to claim 2 is characterized in that: The alkali solution (3) is a 30% NaOH solution.

6. The novel air purification and humidification system suitable for proton membrane hydrogen fuel cells according to claim 2, characterized in that: An analytical instrument measuring port (10) is provided on the tank body (1), and the analytical instrument includes any one or a combination of a pH meter, a turbidity meter, and a liquid level meter.

7. The novel air purification and humidification system suitable for proton membrane hydrogen fuel cells according to claim 2, characterized in that: A sewage outlet (11) is provided at the bottom of the tank body (1), and the sewage outlet (11) is connected to a waste liquid collection container (12) via a sewage pipe.

8. The novel air purification and humidification system suitable for proton membrane hydrogen fuel cells according to claim 7, characterized in that: The alkali liquid inlet (4) is connected to the alkali liquid inlet pipe, and an alkali liquid inlet automatic valve (13) is provided on the alkali liquid inlet pipe; the water inlet (5) is connected to the water inlet pipe, and an automatic water inlet valve (14) is provided on the water inlet pipe; the sewage outlet (11) is provided with an automatic sewage discharge valve (15); the above-mentioned automatic alkali inlet valve (13), automatic water inlet valve (14) and automatic sewage discharge valve (15) are all connected to a control system.

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