Tail gas treatment device of proton exchange membrane fuel cell cogeneration system

Abstract

The utility model discloses a proton exchange membrane fuel cell combined heat and power system tail gas treatment device which comprises a gas inlet pipe and a gas outlet pipe, and a heat exchange assembly is arranged between the gas inlet pipe and the gas outlet pipe. During use, tail gas discharged by the proton exchange membrane fuel cell cogeneration system enters the gas inlet pipe and continues to enter the heat exchange assembly, the heat exchange assembly is used for reducing the temperature of the tail gas, so that water vapor in the tail gas is condensed into liquid condensate water, and the cooled tail gas is discharged through the exhaust pipe. At the moment, water vapor in the exhausted tail gas is separated out, the phenomenon of freezing at the exhaust port of the exhaust pipe can be effectively prevented, the proton exchange membrane battery combined heat and power system can be conveniently maintained, normal operation of the proton exchange membrane battery combined heat and power system is guaranteed, economic losses are reduced, and economic benefits are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell technical field especially relates to a kind of proton exchange membrane fuel cell cogeneration system tail gas treatment device. BACKGROUND

[0002] Proton exchange membrane fuel cell cogeneration system is the generator set device using hydrogen power generation for power supply and heating purposes, which is composed of fuel cell power generation system and heating system. The working principle of the current fuel cell cogeneration system is that hydrogen is introduced into the anode side of the fuel cell, and air is introduced into the cathode side of the fuel cell. Hydrogen and air undergo electrochemical reaction in the fuel cell, and the direct current generated by the reaction is converted into alternating current by the power converter for user use. The excess tail gas of the fuel cell anode and cathode enters the tail gas discharge pipeline, and the heat is used for heating water or heating.

[0003] The tail gas discharged by the fuel cell power generation system contains a large amount of water vapor, especially in the case of high-power fuel cell system, the water vapor will condense into liquid water under low temperature, and then be discharged from the tail gas discharge port. In severe cases, icing may occur around the cogeneration system, which is not conducive to the maintenance of the proton exchange membrane fuel cell cogeneration system, and may further affect the normal operation of the proton exchange membrane fuel cell cogeneration system, causing economic loss. SUMMARY

[0004] In order to overcome the above-mentioned defects, the technical problem solved by the utility model is to provide a proton exchange membrane fuel cell cogeneration system tail gas treatment device, which is convenient for maintaining the proton exchange membrane fuel cell cogeneration system, ensuring the normal operation of the proton exchange membrane fuel cell cogeneration system, reducing economic loss and improving economic benefit.

[0005] The utility model relates to a kind of proton exchange membrane fuel cell cogeneration system tail gas treatment device, including intake pipe and exhaust pipe, and heat exchange assembly is arranged between the intake pipe and the exhaust pipe;When used, the tail gas discharged by the proton exchange membrane fuel cell cogeneration system enters the heat exchange assembly through the intake pipe, and the heat exchange assembly is used to reduce the temperature of the tail gas, so that the water vapor in the tail gas condenses into condensed water, and the tail gas after cooling is discharged through the exhaust pipe.

[0006] Furthermore, the heat exchange component includes a circular shell, the left end of the shell is fixedly connected to the left end plate, the right end of the shell is fixedly connected to the right end plate, and the left end plate, the right end plate, and the shell together form a heat exchange chamber; a plurality of tail gas pipes with open ends are horizontally arranged in the heat exchange chamber, the left end of the tail gas pipe is fixedly connected to the left end plate, the left end opening of the tail gas pipe is connected to the tube cavity of the intake pipe, the right end of the tail gas pipe is fixedly connected to the right end plate, and the right end opening of the tail gas pipe is connected to the tube cavity of the exhaust pipe; a cooling water inlet and a cooling water outlet are provided on the shell, and the cooling water inlet and the cooling water outlet are both connected to the heat exchange chamber.

[0007] Furthermore, the inner diameter of the exhaust pipe gradually decreases from the left end to the right end of the exhaust pipe.

[0008] Furthermore, the shell is a split structure, comprising an upper shell and a lower shell that are buckled together; the cooling water inlet is arranged at the bottom of the lower shell, and the cooling water outlet is arranged at the top of the upper shell.

[0009] Furthermore, the cooling water inlet is provided with a cooling water inlet joint, and the cooling water outlet is provided with a cooling water outlet joint.

[0010] Furthermore, a condensate drain port A is provided at the bottom of the air inlet pipe, and the condensate drain port A is connected to a condensate drain connector A; a condensate drain port B is provided at the bottom of the exhaust pipe, and the condensate drain port B is connected to a condensate drain connector B.

[0011] Furthermore, a semicircular upper baffle and a lower baffle are provided in the tube cavity of the exhaust pipe, the upper baffle is provided on the left side of the lower baffle, the upper baffle is fixedly connected to the upper wall of the tube cavity of the exhaust pipe, and the lower baffle is fixedly connected to the lower wall of the tube cavity of the exhaust pipe.

[0012] Furthermore, an upper baffle notch is provided at the top of the upper baffle, and a lower baffle notch is provided at the bottom of the lower baffle.

[0013] Furthermore, the exhaust gas treatment device of the proton exchange membrane fuel cell cogeneration system also includes a bypass pipe, the left end of the bypass pipe is connected to the intake pipe, and the right end of the bypass pipe is connected to the exhaust pipe; a bypass valve is provided on the bypass pipe.

[0014] Furthermore, the right end of the exhaust pipe is bent upward to form an exhaust pipe bending portion.

[0015] After adopting the above technical solution, the beneficial effect of the present invention is that the exhaust gas treatment device of the proton exchange membrane fuel cell cogeneration system includes an air intake pipe and an exhaust pipe, and a heat exchange component is provided between the air intake pipe and the exhaust pipe. When in use, the exhaust gas discharged from the proton exchange membrane fuel cell cogeneration system enters the heat exchange component through the air intake pipe. The heat exchange component is used to reduce the temperature of the exhaust gas, so that the water vapor in the exhaust gas condenses into liquid condensed water. The exhaust gas after cooling is discharged through the exhaust pipe. At this time, the water vapor in the exhaust gas has been separated out, which can effectively prevent the occurrence of freezing and icing at the exhaust outlet of the exhaust pipe, facilitate the maintenance of the proton exchange membrane fuel cell cogeneration system, ensure the normal operation of the proton exchange membrane fuel cell cogeneration system, reduce economic losses, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the tail gas treatment device of the proton exchange membrane fuel cell combined heat and power system of the utility model;

[0017] Figure 2 yes Figure 1 an enlarged perspective view of the heat exchange assembly;

[0018] Figure 3 yes Figure 2 A perspective view of the heat exchange assembly (without the shell);

[0019] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle exhaust pipe;

[0020] Figure 5 yes Figure 4 A three-dimensional view of the upper middle baffle;

[0021] Figure 6 yes Figure 4 A three-dimensional view of the middle and lower baffle;

[0022] In the figure: 1. Inlet pipe; 21. Condensate drain connector A; 22. Condensate drain connector B; 3. Heat exchange assembly; 31. Upper subshell; 32. Lower subshell; 33. Left end plate; 34. Right end plate; 35. Tail pipe; 4. Cooling water inlet connector; 5. Cooling water outlet connector; 6. Exhaust pipe; 61. Exhaust pipe bend; 7. Bypass pipe; 8. Bypass valve; 9. Upper baffle; 10. Lower baffle. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Combine Figure 1As shown, a kind of proton exchange membrane fuel cell cogeneration system exhaust treatment device, it includes intake pipe 1 and exhaust pipe 6, intake pipe 1 with exhaust pipe 6 between being provided with heat exchange component 3.Use when, from the humidifier (not shown in the drawing, and it is the structure known to the public) of proton exchange membrane fuel cell cogeneration system (not shown in the drawing, and it is the structure known to the public) exhaust gas that is discharged into heat exchange component 3 from humidifier (not shown in the drawing, and it is the structure known to the public) of proton exchange membrane fuel cell cogeneration system, heat exchange component 3 is used to reduce the temperature of exhaust gas, so that the water vapor in exhaust gas condenses into condensed water, after cooling exhaust gas is discharged through exhaust pipe 6, water vapor in exhaust gas discharged at this time has been separated, exhaust gas is discharged without water vapor, or only contain a small amount of water vapor, can effectively prevent the phenomenon of frost icing in the exhaust port of exhaust pipe 6, facilitate the maintenance of proton exchange membrane fuel cell cogeneration system, ensure the normal operation of proton exchange membrane fuel cell cogeneration system, reduce economic loss, improve economic efficiency.

[0025] Combination Figure 1 、 Figure 2 , and Figure 3 As shown, heat exchange component 3 includes a circular shell, the left end of the shell is fixedly connected with left end plate 33, the right end of the shell is fixedly connected with right end plate 34, left end plate 33, right end plate 34 and the shell jointly enclose heat exchange cavity.

[0026] A plurality of exhaust gas pipes 35 with both ends open are horizontally arranged in the heat exchange cavity, the left end of the exhaust gas pipe 35 is fixedly connected to the left end plate 33, and the left end opening of the exhaust gas pipe 35 is in communication with the lumen of the intake pipe 1; the right end of the exhaust gas pipe 35 is fixedly connected to the right end plate 34, and the right end opening of the exhaust gas pipe 35 is in communication with the lumen of the exhaust pipe 6.

[0027] Preferably, the inner diameter of the exhaust gas pipe 35 gradually decreases from the left end to the right end.

[0028] Cooling water inlet and cooling water outlet are further provided on the shell, and the cooling water inlet and the cooling water outlet are in communication with the heat exchange cavity.

[0029] Preferably, the shell is a split structure, and the shell includes an upper split shell 31 and a lower split shell 32 that are buckled together; the cooling water inlet is arranged at the bottom of the lower split shell 32, and the cooling water outlet is arranged at the top of the upper split shell 31. The cooling water inlet is arranged at the bottom of the lower split shell 32, and the cooling water outlet is arranged at the top of the upper split shell 31, so that the time of heat exchange between the cooling water and the exhaust gas in the exhaust gas pipe 35 in the heat exchange cavity is prolonged, and the cooling effect is better.

[0030] The upper housing 31, the lower housing 32, the left end plate 33, and the right end plate 34 are detachably connected together. They can be detachably connected together using screws or other conventional connection methods. When the heat exchange assembly 3 fails and requires maintenance, the heat exchange assembly 3 can be easily and quickly disassembled.

[0031] Further preferably, a cooling water inlet connector 4 is provided at the cooling water inlet, and a cooling water outlet connector 5 is provided at the cooling water outlet. The cooling water inlet is provided near the right end of the lower housing 32, and the cooling water outlet is provided near the left end of the upper housing 31.

[0032] Combine Figure 1 、 Figure 4 、 Figure 5 ,as well as Figure 6 As shown, the exhaust pipe 6 is a circular structure. A semicircular upper baffle 9 and lower baffle 10 are disposed within the lumen of the exhaust pipe 6. The upper baffle 9 is disposed to the left of the lower baffle 10 and is fixedly connected to the upper half of the lumen of the exhaust pipe 6. The lower baffle 10 is fixedly connected to the lower half of the lumen of the exhaust pipe 6. The impact of the exhaust gas with the upper baffle 9 and lower baffle 10 improves the separation of the exhaust gas from the condensed water cooled into liquid form.

[0033] Preferably, an upper baffle notch is provided at the top of the upper baffle 9, and a lower baffle notch is provided at the bottom of the lower baffle 10. The upper baffle notch allows exhaust gas to pass through, and the lower baffle notch allows liquid condensed water to pass through.

[0034] Combine Figure 1 As shown, a condensate drain port A is provided at the bottom of the air inlet pipe 1, and the condensate drain port A is connected to a condensate drain connector A 21; a condensate drain port B is provided at the bottom of the exhaust pipe 6, and the condensate drain port B is connected to a condensate drain connector B 22.

[0035] The air inlet pipe 1 is made of waterproof material, and the exhaust pipe 6 is made of waterproof material.

[0036] The exhaust gas treatment device of the proton exchange membrane fuel cell combined heat and power system further includes a bypass pipe 7, the left end of which is connected to the intake pipe 1, and the right end of which is connected to the exhaust pipe 6. A bypass valve 8 is provided on the bypass pipe 7. The bypass valve 8 is preferably a solenoid valve.

[0037] Preferably, the right end of the exhaust pipe 6 is bent upward to form an exhaust pipe bent portion 61 .

[0038] The cooling water used to cool the exhaust gas can also utilize the heating water of the heating system. After cooling the exhaust gas, the temperature of the heating water increases and can be used in the heating system.

[0039] The process of treating the exhaust gas discharged by the proton exchange membrane fuel cell heat and power cogeneration system by using the exhaust gas treatment device of the proton exchange membrane fuel cell heat and power cogeneration system is described in detail as follows:

[0040] The cooling water with low temperature (generally about 30 DEG C) flows into the cooling water inlet joint 4, flows through the heat exchange cavity and then flows out from the cooling water outlet joint 5. The exhaust gas with high temperature (generally about 70 DEG C) discharged by the proton exchange membrane fuel cell heat and power cogeneration system enters the gas inlet pipe 1, then the exhaust gas enters the cavities of the plurality of exhaust gas pipes 35 from the cavity of the gas inlet pipe 1, and the exhaust gas exchanges heat with the cooling water in the cavities of the exhaust gas pipes 35, and then the exhaust gas flowing out from the cavities of the exhaust gas pipes 35 enters the cavity of the exhaust pipe 6 and collides with the upper baffle 9 and the lower baffle 10 in the cavity of the exhaust pipe 6, and then is discharged from the exhaust port of the exhaust pipe bending part 61 of the exhaust pipe 6. The condensed water after the water vapor is cooled is discharged through the condensed water discharge joint A 21 and the condensed water discharge joint B 22.

[0041] When the proton exchange membrane fuel cell heat and power cogeneration system detects that the exhaust back pressure is large, the bypass valve 8 of the bypass pipe 7 is opened, so that the exhaust gas can directly enter the exhaust pipe 6 from the gas inlet pipe 1 through the bypass pipe 7, thereby ensuring the normal discharge of the exhaust gas.

[0042] The exhaust gas flows into the heat exchange assembly 3 from the left end and flows out of the heat exchange assembly 3 from the right end; the cooling water flows into the heat exchange assembly 3 from the right end and flows out of the heat exchange assembly 3 from the left end, and the flow directions of the exhaust gas and the cooling water are opposite, so that the cooling water can better exchange heat with the exhaust gas.

[0043] When the exhaust gas just enters the exhaust gas pipe 35, the flow speed of the exhaust gas is slow due to the large inner diameter of the exhaust gas pipe 35, which is beneficial to better heat exchange between the exhaust gas and the cooling water in the heat exchange cavity, so that the temperature of the exhaust gas is lowered and the water vapor in the exhaust gas is condensed into liquid condensed water; when the exhaust gas wants to leave the exhaust gas pipe 35, the flow speed of the exhaust gas is increased due to the small inner diameter of the exhaust gas pipe 35, which is beneficial to the discharge of the liquid condensed water.

[0044] When the exhaust gas flows through the upper baffle 9 and the lower baffle 10, the liquid condensed water in the exhaust gas is further blocked by the collision with the upper baffle 9 and the lower baffle 10, thereby reducing the water content in the exhaust gas.

[0045] The technical features with serial numbers in the specification (such as the condensed water discharge port A, the condensed water discharge port B, the condensed water discharge joint A, the condensed water discharge joint B and the like) are only used to distinguish the technical features and do not represent the positional relationship, installation sequence and working sequence between the technical features.

[0046] In the description of this specification, it should be understood that the orientations or positional relationships described as "left end to right end", "left end", "right end", "upper subshell", "lower subshell", "left end plate", "right end plate", "top", "bottom", "upper baffle", "lower baffle", "upper half wall", "lower half wall", "upward", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by ordinary technicians in this field based on the above-mentioned conception without creative work are all within the scope of protection of the present invention.

Claims

1. A tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system, characterized in that: It includes an intake pipe and an exhaust pipe, and a heat exchange component is provided between the intake pipe and the exhaust pipe. When in use, the exhaust gas discharged from the proton exchange membrane fuel cell cogeneration system enters the heat exchange component through the intake pipe. The heat exchange component is used to reduce the temperature of the exhaust gas, so that the water vapor in the exhaust gas is condensed into condensed water. The cooled exhaust gas is discharged through the exhaust pipe.

2. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 1, characterized in that: The heat exchange assembly includes a circular shell, the left end of the shell is fixedly connected to the left end plate, the right end of the shell is fixedly connected to the right end plate, and the left end plate, the right end plate, and the shell together form a heat exchange chamber; a plurality of tail gas pipes with open ends are horizontally arranged in the heat exchange chamber, the left end of the tail gas pipe is fixedly connected to the left end plate, the left end opening of the tail gas pipe is connected to the tube cavity of the intake pipe, the right end of the tail gas pipe is fixedly connected to the right end plate, and the right end opening of the tail gas pipe is connected to the tube cavity of the exhaust pipe; a cooling water inlet and a cooling water outlet are provided on the shell, and the cooling water inlet and the cooling water outlet are both connected to the heat exchange chamber.

3. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 2, characterized in that: The inner diameter of the exhaust pipe gradually decreases from the left end to the right end of the exhaust pipe.

4. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 3, characterized in that: The shell is a split structure, comprising an upper shell and a lower shell that are buckled together; the cooling water inlet is arranged at the bottom of the lower shell, and the cooling water outlet is arranged at the top of the upper shell.

5. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 4, characterized in that: The cooling water inlet is provided with a cooling water inlet joint, and the cooling water outlet is provided with a cooling water outlet joint.

6. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 1, characterized in that: A condensate drain port A is provided at the bottom of the air inlet pipe, and the condensate drain port A is connected to a condensate drain connector A; a condensate drain port B is provided at the bottom of the exhaust pipe, and the condensate drain port B is connected to a condensate drain connector B.

7. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 1, characterized in that: A semicircular upper baffle and a lower baffle are also provided in the tube cavity of the exhaust pipe. The upper baffle is provided on the left side of the lower baffle, the upper baffle is fixedly connected to the upper wall of the tube cavity of the exhaust pipe, and the lower baffle is fixedly connected to the lower wall of the tube cavity of the exhaust pipe.

8. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 7, characterized in that: An upper baffle notch is provided at the top of the upper baffle, and a lower baffle notch is provided at the bottom of the lower baffle.

9. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 1, characterized in that: The exhaust gas treatment device of the proton exchange membrane fuel cell cogeneration system also includes a bypass pipe, the left end of which is connected to the intake pipe, and the right end of which is connected to the exhaust pipe; a bypass valve is provided on the bypass pipe.

10. The tail gas treatment device for a proton exchange membrane fuel cell combined heat and power system according to claim 1, characterized in that: The right end of the exhaust pipe is bent upward to form an exhaust pipe bending portion.

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