Hydrogen purification device and hydrogen production equipment

Abstract

The utility model discloses a hydrogen purification device and hydrogen production equipment. The hydrogen purification device comprises a deoxidation unit and a drying unit, the deoxidation unit comprises a heat exchanger, a deaerator, a first cooler and a first gas-water separator which are sequentially connected in series; the drying unit comprises a first dryer, a second dryer and a third dryer which are arranged in parallel; dryer air inlet pipes of the first dryer, the second dryer and the third dryer are respectively connected with a first separation air outlet of the first air-water separator; the drying unit further comprises three regenerative bypasses connected with the three dryer air inlet pipes respectively, and the three regenerative bypasses are connected with a heat exchanger inlet of the heat exchanger respectively. Heat in gas from the dryer of the drying unit can be recycled, and the heat utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology, specifically to a hydrogen purification device and hydrogen production equipment. Background Technology

[0002] Electrolysis of water is one of the most common methods for producing hydrogen. The hydrogen produced by electrolysis contains a large amount of water vapor. To improve the purity of the hydrogen, it usually needs to be dehydrated and purified using a hydrogen purification device. This device typically includes a deoxygenation section and a drying section. However, the heat generated during the drying process is often wasted because the high-temperature gas produced is not utilized.

[0003] In view of the above shortcomings, it is necessary to design a hydrogen purification device and a hydrogen production equipment. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is that in the existing hydrogen purification device, the heat is heated first and then cooled during the purification process, which results in a large waste of heat and a large energy consumption of the cooling unit. Thus, this utility model provides a hydrogen purification device and hydrogen production equipment.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A hydrogen purification device includes a deoxygenation unit and a drying unit;

[0007] The deoxygenation unit includes a heat exchanger, a deoxygenator, a first cooler, and a first gas-water separator connected in series.

[0008] The drying unit includes a first dryer, a second dryer, and a third dryer arranged in parallel.

[0009] The air inlet pipes of the first dryer, the second dryer, and the third dryer are respectively connected to the first separation outlet of the first gas-water separator;

[0010] The drying unit also includes three regenerative bypasses that are respectively connected to the three dryer inlet pipes, and the three regenerative bypasses are respectively connected to the heat exchanger inlet of the heat exchanger.

[0011] Furthermore, the drying unit also includes a second cooler, the heat exchanger outlet of the heat exchanger is connected to the cooler gas inlet of the second cooler via a pipeline, and the drying unit also includes three cooling bypasses connected to the three dryer inlet pipes respectively, and the three cooling bypasses are respectively connected to the cooler gas outlet of the second cooler.

[0012] Furthermore, the drying unit also includes three regenerative control valves respectively installed on the three regenerative bypasses, and three cooling control valves respectively installed on the three cooling bypasses;

[0013] The three regenerative control valves work together to control one of the three regenerative bypasses to connect to the heat exchanger.

[0014] The three cooling control valves work together to control one of the three cooling bypasses to connect to the dryer inlet pipe.

[0015] Furthermore, the drying unit also includes a heater;

[0016] The dryer outlet pipes of the first dryer, the second dryer, and the third dryer are respectively connected to the heater inlet of the heater through three heating inlet bypasses;

[0017] The dryer outlet pipes of the first dryer, the second dryer, and the third dryer are respectively connected to the heater outlet of the heater through three heating outlet bypasses.

[0018] Furthermore, the drying unit also includes three intake control valves respectively installed on the heating intake bypass, and three outlet control valves respectively installed on the heating outlet bypass;

[0019] The three intake control valves work together to control one of the three heating intake bypasses to connect to the heater inlet;

[0020] The three outlet bypass controllers work together to control one of the three heating outlet bypasses to connect to the heater outlet.

[0021] Furthermore, it also includes three hydrogen emission bypasses, one end of which is connected to the dryer outlet pipe, and the other end is adapted to lead to a hydrogen user.

[0022] Furthermore, it also includes three emission control valves respectively installed on the three hydrogen emission bypasses, the three emission control valves working together to control one of the three hydrogen emission bypasses to connect to the hydrogen user.

[0023] Furthermore, the drying unit also includes three dryer air intake control valves respectively installed on the three dryer air intake pipes. The three dryer air intake control valves work together to control one of the three dryer air intake pipes to connect to the first separation outlet of the first gas-water separator.

[0024] Furthermore, the deoxygenation unit also includes a second gas-water separator connected in series upstream of the heat exchanger via a pipeline.

[0025] The technical solution of this utility model has the following advantages:

[0026] 1. The hydrogen purification device provided by this utility model includes a deoxygenation unit and a drying unit; the deoxygenation unit includes a heat exchanger, a deoxygenator, a first cooler, and a first gas-liquid separator connected in series; the drying unit includes a first dryer, a second dryer, and a third dryer connected in parallel; the dryer inlet pipes of the first dryer, the second dryer, and the third dryer are respectively connected to the first separation outlet of the first gas-liquid separator; three regenerative bypasses connected to the three dryer inlet pipes are respectively connected to the heat exchanger inlet of the heat exchanger, so that the high-temperature gas from the drying unit can be used to heat the hydrogen gas to be deoxygenated before entering the deoxygenator in the heat exchanger, thereby improving the heat utilization rate.

[0027] 2. The hydrogen purification device provided by this utility model includes a second cooler in the drying unit. The heat exchanger outlet of the heat exchanger is connected to the cooling gas inlet of the second cooler through a pipeline. Three cooling bypasses are respectively connected to the three dryer inlet pipes and respectively connected to the cooling gas outlet of the second cooler. The high temperature gas from the drying unit exchanges heat with the hydrogen to be deoxygenated in the heat exchanger and the temperature decreases, thereby reducing the initial temperature of the gas entering the second cooler and making cooling easier.

[0028] 3. The hydrogen purification device provided by this utility model further includes a second gas-water separator connected in series with the upstream of the heat exchanger via a pipeline. This reduces the impact of water vapor in the gas entering the deoxygenator on the catalyst.

[0029] A hydrogen production device, including the aforementioned hydrogen purification apparatus.

[0030] The technical solution of this utility model has the following advantages:

[0031] The hydrogen production equipment provided by this utility model has all the advantages of the aforementioned hydrogen purification device. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the hydrogen purification device in an embodiment of the present invention;

[0034] Figure 2 for Figure 1A schematic diagram of the part to the left of the dotted line on the left side of the middle section;

[0035] Figure 3 for Figure 1 A schematic diagram of the part to the right of the dotted line on the right side of the middle section.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Heat exchanger; 2. Deaerator; 3. First cooler; 4. First gas-liquid separator; 6. Second gas-liquid separator; 71. First dryer; 72. Second dryer; 73. Third dryer; 8. Second cooler; 9. Heater; 10. Hydrogen user; A. Dryer inlet pipe; a. Regenerative bypass; a0. Regenerative control valve; a01. First regenerative control valve; a02. Second regenerative control valve; a03. Third regenerative control valve; b. Cooling bypass; b0. Cooling control valve; b01. First cooling control valve; b02. Second cooling control valve; b03. Third cooling control valve; B. Dryer outlet pipe; c. Heating inlet bypass; c0. Inlet control valve;

[0038] c01, First intake control valve; c02, Second intake control valve; c03, Third intake control valve; d, Heating outlet bypass; d0, Outlet control valve; d01, First outlet control valve; d02, Second outlet control valve;

[0039] d03, Third exhaust control valve; e, Hydrogen exhaust bypass; e0, Exhaust control valve; e01, First exhaust control valve; e02, Second exhaust control valve; e03, Third exhaust control valve; f0, Dryer inlet control valve;

[0040] f01, First dryer inlet control valve; f02, Second dryer inlet control valve; f03, Third dryer inlet control valve; g, Pneumatic regulating valve. Detailed Implementation

[0041] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] like Figures 1 to 3 As shown, this embodiment provides a hydrogen purification device, mainly including a deoxygenation unit (such as...). Figure 2 (as shown) and drying unit (e.g.) Figure 3 As shown in the image, it should be noted that... Figure 2 and Figure 3 When put together, it becomes complete. Figure 1 .

[0047] The deoxygenation unit includes a second gas-liquid separator 6, a heat exchanger 1, a deoxygenator 2, a first cooler 3, and a first gas-liquid separator 4 connected in series. The structure and function of the second gas-liquid separator 6, heat exchanger 1, deoxygenator 2, first cooler 3, and first gas-liquid separator 4 in the deoxygenation unit are existing technologies and will not be described in detail here. The raw material hydrogen first enters the second gas-liquid separator 6, and then passes through the heat exchanger 1, deoxygenator 2, first cooler 3, and first gas-liquid separator 4 in sequence before entering the drying unit.

[0048] The drying unit includes a first dryer 71, a second dryer 72, and a third dryer 73 arranged in parallel. Each of the first dryer 71, the second dryer 72, and the third dryer 73 has a dryer inlet pipe A (e.g., ...) connected to its lower end. Figure 3The vertical line enclosed by the dotted rectangle in the lower middle section) is connected to the first separation outlet of the first gas-water separator 4. Specifically, the lower ends of the three dryer inlet pipes A converge into a main pipe, which is connected to the first separation outlet of the first gas-water separator 4.

[0049] The drying unit also includes three regenerative bypasses a connected to the three dryer inlet pipes A respectively. The three regenerative bypasses a are connected to the heat exchanger inlet of heat exchanger 1 respectively. Specifically, the right ends of the three regenerative bypasses a converge into a main pipe, which is connected to the heat exchanger inlet.

[0050] The drying unit also includes three regenerative control valves a0 installed on three regenerative bypasses a, and three cooling control valves b0 installed on three cooling bypasses b. The three regenerative control valves a0 work together to control one of the three regenerative bypasses a to connect to the heat exchanger 1. The three cooling control valves b0 work together to control one of the three cooling bypasses b to connect to the dryer inlet pipe A. Each of the three dryer inlet pipes A is equipped with a dryer inlet control valve f0, which works together to control the opening and closing of the dryer inlet pipe A.

[0051] The drying unit also includes a second cooler 8, and the heat exchanger outlet of the heat exchanger 1 is connected to the cooler gas inlet of the second cooler 8 via a pipeline. The drying unit also includes three cooling bypasses b connected to three dryer inlet pipes A respectively, and the three cooling bypasses b are respectively connected to the cooler gas outlet of the second cooler 8. Specifically, the right ends of the three cooling bypasses b converge into a main pipe, which is connected to the cooler gas outlet.

[0052] The drying unit also includes a heater 9. The dryer outlet pipes B of the first dryer 71, the second dryer 72, and the third dryer 73 are respectively connected to the heater inlet of the heater 9 through three heating inlet bypasses c. Specifically, the right ends of the three heating inlet bypasses c converge into a main pipe, which is connected to the heater inlet. The dryer outlet pipes B of the first dryer 71, the second dryer 72, and the third dryer 73 (e.g. Figure 3 The portion enclosed by the dotted rectangle in the upper middle part is connected to the heater outlet of heater 9 through three heating gas bypasses d. Specifically, the right ends of the three heating gas bypasses d converge into a main pipe, which is connected to the heater outlet.

[0053] The drying unit also includes three intake control valves c0 respectively installed on the heating intake bypass c, and three outlet control valves d0 respectively installed on the heating outlet bypass d. The three intake control valves c0 work together to control one of the three heating intake bypasses c to connect to the heater inlet, and the three outlet bypass controllers work together to control one of the three heating outlet bypasses d to connect to the heater outlet.

[0054] The drying unit also includes three hydrogen emission bypasses e. One end of each of the three hydrogen emission bypasses e is connected to the dryer outlet pipe B, and the other end is adapted to lead to the hydrogen user 10. Specifically, the right ends of the three hydrogen emission bypasses e are combined into a main pipe, which leads to the hydrogen user 10.

[0055] The drying unit also includes three emission control valves e0 installed on the three hydrogen emission bypasses e respectively. The three emission control valves e0 work together to control one of the three hydrogen emission bypasses e to connect to the hydrogen user 10.

[0056] The following describes the operation of the hydrogen purification device in this embodiment. (For ease of explanation, the regenerative control valve a0 is defined as the first regenerative control valve a01, the second regenerative control valve a02, and the third regenerative control valve a03, corresponding to the first dryer 71, the second dryer 72, and the third dryer 73, respectively; the cooling control valve b0 is defined as the first cooling control valve b01, the second cooling control valve b02, and the third cooling control valve b03, corresponding to the first dryer 71, the second dryer 72, and the third dryer 73, respectively; and the intake control valve c0 is defined as the first intake control valve c01, the second intake control valve c02, and the third intake control valve c03, corresponding to the first dryer 71, the second dryer 72, and the third dryer 73, respectively.) 03; Define the exhaust control valve d0 corresponding to the first dryer 71, the second dryer 72, and the third dryer 73 as the first exhaust control valve d01, the second exhaust control valve d02, and the third exhaust control valve d03, respectively; define the discharge control valve e0 corresponding to the first dryer 71, the second dryer 72, and the third dryer 73 as the first discharge control valve e01, the second discharge control valve e02, and the third discharge control valve e03, respectively; define the dryer intake control valve f0 corresponding to the first dryer 71, the second dryer 72, and the third dryer 73 as the first dryer intake control valve f01, the second dryer intake control valve f02, and the third dryer intake control valve f03, respectively; (Initially, these valves are closed).

[0057] When the first dryer 71 is working, the first dryer inlet control valve f01, the first inlet control valve c01, the second outlet control valve d02, the second regeneration control valve a02, the third cooling control valve b03, and the third discharge control valve e03 are opened. After the gas enters the first dryer 71 from the first gas-water separator 4, it passes through the heater 9, the second dryer 72, the heat exchanger 1, the second cooler 8, and the third dryer 73 in sequence, and then is sent to the hydrogen user 10 along the hydrogen discharge bypass e corresponding to the third dryer 73.

[0058] When the second dryer 72 is working, the second dryer inlet control valve f02, the second inlet control valve c02, the third outlet control valve d03, the third regeneration control valve a03, the first cooling control valve b01, and the first discharge control valve e01 are opened. After the gas enters the second dryer 72 from the first gas-water separator 4, it passes through the heater 9, the third dryer 73, the heat exchanger 1, the second cooler 8, and the first dryer 71 in sequence, and then is sent to the hydrogen user 10 along the hydrogen discharge bypass e corresponding to the first dryer 71.

[0059] When the third dryer 73 is working, the third dryer inlet control valve f03, the third inlet control valve c03, the first outlet control valve d01, the first regeneration control valve a01, the second cooling control valve b02, and the second discharge control valve e02 are opened. After the gas enters the third dryer 73 from the first gas-water separator 4, it passes through the heater 9, the first dryer 71, the heat exchanger 1, the second cooler 8, and the second dryer 72 in sequence, and then is sent to the hydrogen user 10 along the hydrogen discharge bypass e corresponding to the second dryer 72.

[0060] The specific processing procedures for each processing time period are described below:

[0061] 0-12 hours: While the first dryer 71 processes 250 Nm3 / h working hydrogen adsorption for 12 hours, the product hydrogen enters the second dryer 72 as regeneration gas and is automatically heated and temperature-controlled at 250℃ for 6 hours of regeneration. After being recovered by the heat exchanger 1, it is cooled and condensed by the second cooler 8 to remove condensate. The third dryer 73 dehumidifies and adsorbs the regenerated hydrogen after cooling and condensation for 12 hours. Originally, it was necessary to blow cool for 6 hours after the 6 hours of regeneration in the dryer, but now the 6 hours of blowing cool time can be saved.

[0062] When the 12-hour mark is reached: the drying unit automatically switches to the second dryer 72 to process 250 Nm3 / h working hydrogen adsorption for 12 hours. At the same time, the product hydrogen enters the third dryer 73 as regeneration gas, is automatically heated and the temperature is controlled at 250℃ for 6 hours of regeneration. After being recovered by the heat exchanger 1, it is cooled and condensed by the second cooler 8 to remove the condensate. The first dryer 71 adsorbs the regenerated hydrogen after cooling and condensing for 12 hours.

[0063] When the 24-hour mark is reached: the drying unit automatically switches valves again, and the third dryer 73 processes 250 Nm3 / h working hydrogen adsorption for 12 hours. At the same time, the product hydrogen enters the first dryer 71 as regeneration gas, and is automatically heated and the temperature is controlled at 250℃ for 6 hours of regeneration. After being recovered by the heat exchanger 1, it is cooled and condensed by the second cooler 8 to remove the condensate. The second dryer 72 adsorbs the regenerated hydrogen after cooling and condensing for 12 hours.

[0064] When the drying unit reaches 36 hours: the drying unit automatically switches valves again and returns to the 0-12 hour processing stage. The first dryer 71 adsorbs for 12 hours, the second dryer 72 automatically heats and controls the temperature at 250℃, and after being recovered by the heat exchanger 1, it is cooled and condensed by the second cooler 8 to remove the condensate. The third dryer 73 adsorbs for 12 hours.

[0065] In this way, the cycle repeats every 36 hours, producing 250 Nm3 / h of pure hydrogen which is then sent to the hydrogen storage tank and supplied to the user after passing through a pressure-reducing gas distribution device.

[0066] The hydrogen purification device provided in this embodiment can use the high-temperature gas from the drying unit to heat the hydrogen gas to be deoxygenated before entering the deoxygenator 2 in the heat exchanger 1, thereby improving the heat utilization rate. After the high-temperature gas from the drying unit exchanges heat with the hydrogen gas to be deoxygenated in the heat exchanger 1, the temperature of the gas decreases, which in turn reduces the initial temperature of the gas entering the second cooler 8, making cooling easier. The setting of the second gas-water separator 6 can reduce the impact of water vapor in the gas entering the deoxygenator 2 on the catalyst.

[0067] Example 2

[0068] A hydrogen production device, including the aforementioned hydrogen purification apparatus (such as...) Figures 1 to 3 (As shown).

[0069] The hydrogen production equipment provided in this embodiment has all the advantages of the hydrogen purification device in Embodiment 1.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A hydrogen purification device, characterized in that, Includes a deoxygenation unit and a drying unit; The deoxygenation unit includes a heat exchanger (1), a deoxygenator (2), a first cooler (3), and a first gas-water separator (4) connected in series. The drying unit includes a first dryer (71), a second dryer (72), and a third dryer (73) arranged in parallel; the dryer inlet pipes (A) of the first dryer (71), the second dryer (72), and the third dryer (73) are respectively connected to the first separation outlet of the first gas-water separator (4); The drying unit also includes three regenerative bypasses (a) that are respectively connected to the three dryer inlet pipes (A), and the three regenerative bypasses (a) are respectively connected to the inlet of the heat exchanger (1).

2. The hydrogen purification apparatus according to claim 1, characterized in that, The drying unit also includes a second cooler (8), the heat exchanger outlet of the heat exchanger (1) is connected to the cooler gas inlet of the second cooler (8) through a pipeline, and the drying unit also includes three cooling bypasses (b) connected to the three dryer inlet pipes (A) respectively, and the three cooling bypasses (b) are respectively connected to the cooler gas outlet of the second cooler (8).

3. The hydrogen purification apparatus according to claim 2, characterized in that, The drying unit also includes three regenerative control valves (a0) respectively installed on the three regenerative bypasses (a), and three cooling control valves (b0) respectively installed on the three cooling bypasses (b); The three regenerative control valves (a0) work together to control one of the three regenerative bypasses (a) to connect to the heat exchanger (1); The three cooling control valves (b0) work together to control one of the three cooling bypasses (b) to connect to the dryer inlet pipe (A).

4. The hydrogen purification apparatus according to claim 3, characterized in that, The drying unit also includes a heater (9); The dryer outlet pipes (B) of the first dryer (71), the second dryer (72) and the third dryer (73) are respectively connected to the heater inlet of the heater (9) through three heating inlet bypasses (c); The dryer outlet pipes (B) of the first dryer (71), the second dryer (72) and the third dryer (73) are respectively connected to the heater outlet of the heater (9) through three heating outlet bypasses (d).

5. The hydrogen purification apparatus according to claim 4, characterized in that, The drying unit also includes three intake control valves (c0) respectively installed on the heating intake bypass (c), and three outlet control valves (d0) respectively installed on the heating outlet bypass (d); The three intake control valves (c0) work together to control one of the three heating intake bypasses (c) to connect to the heater inlet; The three outlet control valves (d0) work together to control one of the three heating outlet bypasses (d) to connect to the heater outlet.

6. The hydrogen purification apparatus according to claim 4 or 5, characterized in that, The drying unit also includes three hydrogen emission bypasses (e), one end of each of the three hydrogen emission bypasses (e) is connected to the dryer outlet pipe (B), and the other end is adapted to lead to a hydrogen user (10).

7. The hydrogen purification apparatus according to claim 6, characterized in that, The drying unit also includes three emission control valves (e0) respectively installed on the three hydrogen emission bypasses (e). The three emission control valves (e0) work together to control one of the three hydrogen emission bypasses (e) to connect to the hydrogen user (10).

8. The hydrogen purification apparatus according to claim 7, characterized in that, The drying unit also includes three dryer inlet control valves (f0) respectively installed on the three dryer inlet pipes (A). The three dryer inlet control valves (f0) work together to control one of the three dryer inlet pipes (A) to connect to the first separation outlet of the first gas-water separator (4).

9. The hydrogen purification apparatus according to any one of claims 1-5 and 7-8, characterized in that, The deoxygenation unit also includes a second gas-water separator (6) connected in series upstream of the heat exchanger (1) via a pipeline.

10. A hydrogen production device, characterized in that, The hydrogen purification apparatus includes any one of claims 1-9.

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