Hydrogen purification device

Abstract

The utility model relates to the technical field of hydrogen purification, and discloses a hydrogen purification device which comprises a purification box, and a precipitation bin, an oil removal bin, a drying bin and a purification bin which are arranged on the purification box, a gas inlet pipe is fixedly arranged on the side wall of the purification box, and a gas outlet pipe is fixedly arranged at the upper end of the purification box; the purification box is provided with a purification assembly for purifying hydrogen, the purification assembly comprises a first filter screen fixedly mounted between the precipitation bin and the oil removal bin, and under the action of the first filter screen, a second filter screen and soda lime, oil and moisture contained in the hydrogen are completely absorbed, so that the purity of the hydrogen is improved; then, the hydrogen is in contact with the hollow fiber membrane, the hollow fiber membrane blocks other gases except the hydrogen, and finally, the hydrogen with the purity reaching 99.99 is discharged from the gas outlet pipe, so that the hydrogen explosion in the generator caused by insufficient hydrogen purity is avoided, and the flight crew is prevented from being hurt.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen purification technical field, concretely is a hydrogen purification device. BACKGROUND

[0002] Hydrogen has the characteristics of small density, fast heat transfer and fast heat dissipation, and its heat dissipation capacity is 8 times that of air, so hydrogen is widely used as a superior cooling medium in modern large steam turbine generator units. During operation of the generator, the purity of hydrogen is an important monitoring index. In order to enable the unit to operate safely, economically and stably, it is necessary to strictly ensure the purity of hydrogen in the generator.

[0003] Unqualified hydrogen purity directly affects the safety of the unit. If the hydrogen purity decreases to the explosion range (4%~75%), hydrogen explosion in the generator may occur under certain conditions, which has serious consequences. In addition, when the hydrogen purity decreases, the density of the mixed gas increases with the decrease of the hydrogen purity, which will increase the ventilation friction loss of the generator and reduce the efficiency of the generator. According to the book "Design, Manufacture and Operation of Large Steam Turbine Generators" edited by Wang Geng and Li Ximing, the ventilation loss increases by 11% when the hydrogen purity decreases by 1%. Therefore, it is extremely uneconomical for the generator to operate for a long time when the hydrogen purity is low, and the method of discharging hydrogen and supplementing hydrogen to improve the hydrogen purity in the generator poses a potential threat to the safe operation of the unit and also causes certain economic losses.

[0004] Usually, to solve the problem of low hydrogen purity, power plant workers usually take measures such as adjusting the operating parameters of the sealing oil system, increasing the power of the exhaust gas fan to increase the exhaust speed of the flue gas, etc. However, these parameter adjustments cannot fundamentally solve the problem of rapid decrease of hydrogen purity in the unit, but only control the speed of decrease of hydrogen purity. Therefore, most power plants have to replace hydrogen to increase the hydrogen purity in the generator to more than 96%, but replacement of hydrogen will bring the following problems: a large amount of discharged hydrogen will have the potential danger of fire and hydrogen explosion, and increase the workload of the operating personnel; due to the increase of hydrogen supply, the cost of hydrogen supply will also increase significantly.

[0005] Therefore, we propose a hydrogen purification device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a hydrogen purification device to solve the problems of potential danger of fire and hydrogen explosion caused by a large amount of discharged hydrogen, increase of workload of operating personnel, and significant increase of cost of hydrogen supply due to increase of hydrogen supply.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: including the purification tank and setting up the sedimentation bin, the oil removal bin, the drying bin and the purification bin on the purification tank, the lateral wall of the purification tank is fixedly installed with the air inlet pipe, the upper end of the purification tank is fixedly installed with the air outlet pipe, the purification tank is provided with the purification subassembly that carries out the purification to hydrogen, the purification subassembly includes the first filter screen fixedly installed between the sedimentation bin and the oil removal bin, the second filter screen is fixedly installed between the oil removal bin and the drying bin, the upper end of the second filter screen is provided with a plurality of soda lime, the hollow fiber membrane is fixedly installed between the drying bin and the purification bin, the oil removal bin is provided with the cleaning subassembly that carries out the cleaning to the first filter screen and the hollow fiber membrane.

[0008] Preferably, the cleaning assembly includes a telescopic cylinder fixedly installed on the oil removal bin, a vertical rod is fixedly installed at the telescopic end of the telescopic cylinder, a chute is formed in the lateral wall of the second filter screen, a baffle is fixedly installed on the second filter screen, two sliding rails are fixedly installed on the lateral walls of the drying bin and the oil removal bin, a cleaning rod is fixedly installed at both ends of the vertical rod, two fixed blocks are fixedly installed at both ends of the cleaning rod, a rotating shaft is rotatably installed between the two fixed blocks, a roller is fixedly installed on the axial lateral wall of the rotating shaft, a soft brush is adhesively installed on the lateral wall of the cleaning rod, and a knocking assembly is arranged on the lateral wall of the second filter screen to shake and scatter the soda lime.

[0009] Preferably, the knocking assembly includes two fixed plates fixedly installed on the lateral wall of the second filter screen, a rotating shaft is rotatably installed between the two fixed plates, an arc-shaped rod is fixedly installed on the axial lateral wall of the rotating shaft, a torsion spring is arranged between the arc-shaped rod and the fixed plate, and a knocking rod is fixedly installed at both ends of the vertical rod.

[0010] Preferably, the arc-shaped rod and the arc-shaped rod are in the same horizontal plane.

[0011] Preferably, one end of the arc-shaped rod away from the telescopic cylinder has an arc-shaped surface, and one end of the knocking rod close to the telescopic cylinder has an arc-shaped surface.

[0012] Preferably, the soft brush is in close contact with the first filter screen and the hollow fiber membrane.

[0013] Preferably, the height of the baffle is higher than the height of the soda lime.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1、Hydrogen in the first filter screen, second filter screen, the effect of soda lime, the oil and moisture contained in hydrogen are absorbed clean, the purity of hydrogen is improved, then hydrogen contacts with hollow fiber membrane, hollow fiber membrane blocks other gases of hydrogen, finally hydrogen with purity of 99.99% is discharged from the gas outlet, explosion of hydrogen in the generator is avoided due to insufficient hydrogen purity, and the personnel of the unit is avoided from being hurt.

[0016] 2、Because hydrogen at this time has passed the oil removal and moisture removal operation, oil stains and moisture do not affect the use effect of the hollow fiber membrane, the service life of the hollow fiber membrane is indirectly improved, the telescopic air cylinder is started at this time, the first filter screen and the surface of the hollow fiber membrane are cleaned under the cooperation of the telescopic air cylinder, the vertical rod, the cleaning rod, the sliding rail, the roller and the soft brush, the soft brush is used to avoid damage to the hollow fiber membrane, the service life of the hollow fiber membrane is further improved, and the use cost is indirectly reduced.

[0017] 3、When being used for a period of time, the surface of the accumulated soda lime has reacted with water, but the internal soda lime has not reacted, the second filter screen is beaten under the cooperation of the telescopic air cylinder, the vertical rod, the beating rod, the arc-shaped rod and the torsional spring, so that the soda lime is scattered, and the moisture in hydrogen can be continuously adsorbed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall three-dimensional structure schematic view of the utility model;

[0019] Figure 2 It is the purification assembly sectional view of the utility model;

[0020] Figure 3 It is the cleaning assembly sectional view of the utility model;

[0021] Figure 4 It is the Figure 3 enlarged view of A of the utility model;

[0022] Figure 5 It is the beating assembly sectional view of the utility model.

[0023] In the drawing: 1, purification box; 11, sedimentation bin; 12, oil removal bin; 13, drying bin; 14, purification bin; 15, gas inlet pipe; 16, gas outlet pipe; 2, purification assembly; 21, first filter screen; 22, second filter screen; 23, soda lime; 24, hollow fiber membrane; 3, cleaning assembly; 31, telescopic air cylinder; 32, vertical rod; 33, sliding chute; 34, baffle; 35, sliding rail; 36, cleaning rod; 37, fixed block; 38, rotating shaft; 39, roller; 301, soft brush; 4, beating assembly; 41, fixed plate; 42, rotating shaft; 43, arc-shaped rod; 44, torsional spring; 45, beating rod. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] Embodiment one: please refer to Figures 1-4 , including purification tank 1 and setting up in the purification tank 1 deposit bin 11, oil removal bin 12, drying bin 13 and purification bin 14, the lateral wall of purification tank 1 is fixedly installed with inlet pipe 15, inlet pipe 15 and deposit bin 11 are linked, the upper end of purification tank 1 is fixedly installed with outlet pipe 16, outlet pipe 16 and purification bin 14 are linked, purification tank 1 is provided with the purification assembly 2 that carries out purification to hydrogen, purification assembly 2 includes the first filter screen 21 fixedly installed between deposit bin 11 and oil removal bin 12, and the second filter screen 22 is fixedly installed between oil removal bin 12 and drying bin 13, and the upper end of second filter screen 22 is provided with several soda lime 23, and hollow fiber membrane 24 is fixedly installed between drying bin 13 and purification bin 14, the role of hollow fiber membrane 24 is due to the solubility and diffusion coefficient of various gas components when permeating the membrane are different, leading to the relative permeability of different gas in the membrane is different, the relative permeability of air in the components of raw material gas is slowest, so that hydrogen and air can be separated, and cleaning assembly 3 for cleaning first filter screen 21 and hollow fiber membrane 24 is arranged on oil removal bin 12.

[0026] Cleaning assembly 3 includes telescopic cylinder 31 fixedly installed on oil removal bin 12, and the telescopic end of telescopic cylinder 31 is fixedly installed with vertical rod 32, and the lateral wall of second filter screen 22 is provided with sliding groove 33, and the lateral wall of second filter screen 22 is provided with baffle 34, and two slide rails 35 are fixedly installed on the lateral wall of drying bin 13 and oil removal bin 12, and cleaning rod 36 is fixedly installed on both ends of vertical rod 32, and two fixed blocks 37 are fixedly installed on both ends of cleaning rod 36, and rotating shaft 38 is rotatably installed between the two fixed blocks 37, and roller 39 is fixedly installed on the axial lateral wall of rotating shaft 38, and soft hair brush 301 is adhesively installed on the lateral wall of cleaning rod 36, and beating assembly 4 for vibrating and scattering soda lime 23 is arranged on the lateral wall of second filter screen 22.

[0027] Soft hair brush 301 is attached to first filter screen 21 and hollow fiber membrane 24, and soft hair brush 301 can clean first filter screen 21 and hollow fiber membrane 24.

[0028] The height of the baffle 34 is higher than the height of the soda lime 23, so as to avoid the soda lime 23 from falling into the first filter screen 21 from the chute 33.

[0029] In the embodiment, first, hydrogen is delivered from the gas inlet pipe 15 into the purification box 1, and because hydrogen has the principle of small density, it moves upward, at this time, the hydrogen passes through the first filter screen 21, the first filter screen 21 screens the oil contained in the hydrogen, so that the purity of the hydrogen is improved, at this time, the hydrogen after oil removal contacts the large amount of soda lime 23 through the second filter screen 22, at this time, the soda lime 23 absorbs the water in the hydrogen, so that the purity of the hydrogen is improved again, because the permeability of hydrogen is higher than that of oxygen and other impurity gases, at this time, the hydrogen first contacts the hollow fiber membrane 24, the hollow fiber membrane 24 blocks other gases except hydrogen, finally, the hydrogen with a purity of 99.99% goes out of the gas outlet pipe 16 to provide hydrogen for the generator, avoiding the explosion of hydrogen in the generator due to insufficient hydrogen purity, avoiding the harm to the unit personnel, because the hydrogen has been subjected to oil removal and moisture removal, oil stains and moisture will not affect the use effect of the hollow fiber membrane 24, indirectly improving the service life of the hollow fiber membrane 24 and reducing the use cost, at this time, the telescopic air cylinder 31 is started, so that the telescopic air cylinder 31 drives the vertical rod 32 and the cleaning rod 36 to move on the slide rail 35, because the two ends of the cleaning rod 36 adopt the rollers 39, the displacement resistance can be reduced, at this time, the soft brush 301 is driven to clean the surface of the first filter screen 21 and the hollow fiber membrane 24, the soft brush 301 avoids damaging the hollow fiber membrane 24, further improving the service life of the hollow fiber membrane 24.

[0030] Embodiment two: the embodiment is improved on the basis of embodiment one, for details, please refer to Figure 5 The striking assembly 4 comprises two fixed plates 41 fixedly installed on the side wall of the second filter screen 22, a rotating shaft 42 rotatably installed between the two fixed plates 41, an arc-shaped rod 43 fixedly installed on the axial side wall of the rotating shaft 42, a torsional spring 44 arranged between the arc-shaped rod 43 and the fixed plate 41, and a striking rod 45 fixedly installed at the two ends of the vertical rod 32.

[0031] The striking rod 45 and the arc-shaped rod 43 are in the same horizontal plane, and the striking rod 45 can extrude the arc-shaped rod 43 when it is displaced.

[0032] The arc-shaped surface of the arc-shaped rod 43 is away from the one end of the telescopic air cylinder 31, the arc-shaped surface of the striking rod 45 is close to the one end of the telescopic air cylinder 31, and the striking rod 45 will not displace the arc-shaped rod 43 when it moves towards the telescopic air cylinder 31.

[0033] In the embodiment: when used for a period of time, the accumulated soda lime 23 surface has reacted with water, but the internal soda lime 23 has not reacted, at this time the telescopic end of the telescopic cylinder 31 drives the vertical rod 32 and the beating rod 45 to displace, so that the beating rod 45 extrudes the arc-shaped rod 43, and the end of the arc-shaped rod 43 adhering to the second filter screen 22 deviates from the second filter screen 22, when the force is released, the arc-shaped rod 43 beats the second filter screen 22 through the action of the torsion spring 44, so that the soda lime 23 is scattered, and then the water in the hydrogen can be continuously adsorbed.

[0034] The contents not described in detail in the specification belong to the prior art known to the person skilled in the art.

[0035] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydrogen purification device, comprising a purification box (1) and a precipitation bin (11), an oil removal bin (12), a drying bin (13) and a purification bin (14) opened on the purification box (1), a gas inlet pipe (15) is fixedly installed on the side wall of the purification box (1), and a gas outlet pipe (16) is fixedly installed at the upper end of the purification box (1), characterized in that: The purification box (1) is provided with a purification assembly (2) for purifying hydrogen, the purification assembly (2) comprises a first filter screen (21) fixedly installed between a precipitation bin (11) and an oil removal bin (12), a second filter screen (22) fixedly installed between the oil removal bin (12) and a drying bin (13), a plurality of lime (23) provided on the upper end of the second filter screen (22), a hollow fiber membrane (24) fixedly installed between the drying bin (13) and a purification bin (14), and a cleaning assembly (3) provided on the oil removal bin (12) for cleaning the first filter screen (21) and the hollow fiber membrane (24).

2. A hydrogen purification device according to claim 1, characterized in that: The cleaning assembly (3) comprises a telescopic air cylinder (31) fixedly installed on the oil removal bin (12), a vertical rod (32) fixedly installed at the telescopic end of the telescopic air cylinder (31), a sliding groove (33) formed in the side wall of the second filter screen (22), a baffle (34) fixedly installed on the second filter screen (22), two sliding rails (35) fixedly installed on the side walls of the drying bin (13) and the oil removal bin (12), a cleaning rod (36) fixedly installed at both ends of the vertical rod (32), two fixed blocks (37) fixedly installed at both ends of the cleaning rod (36), a rotating shaft (38) rotatably installed between the two fixed blocks (37), a roller (39) fixedly installed on the axial side wall of the rotating shaft (38), a soft brush (301) adhesively installed on the side wall of the cleaning rod (36), and a knocking assembly (4) provided on the side wall of the second filter screen (22) for scattering the lime (23).

3. A hydrogen purification device according to claim 2, characterized in that: The knocking assembly (4) comprises two fixed plates (41) fixedly installed on the side wall of the second filter screen (22), a rotating shaft (42) rotatably installed between the two fixed plates (41), an arc-shaped rod (43) fixedly installed on the axial side wall of the rotating shaft (42), a torsion spring (44) provided between the arc-shaped rod (43) and the fixed plate (41), and a knocking rod (45) fixedly installed at both ends of the vertical rod (32).

4. A hydrogen purification device according to claim 3, characterized in that: The knocking rod (45) and the arc-shaped rod (43) are in the same horizontal plane.

5. A hydrogen purification device according to claim 4, characterized in that: The arc-shaped surface of the arc-shaped rod (43) is away from one end of the telescopic air cylinder (31), and the arc-shaped surface of the knocking rod (45) is close to one end of the telescopic air cylinder (31).

6. The hydrogen purification device of claim 2, wherein: The soft brush (301) is in close contact with the first filter screen (21) and the hollow fiber membrane (24).

7. The hydrogen purification device of claim 2, wherein: The height of the baffle (34) is higher than the height of the plurality of lime (23).

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