CN210150715U - Natural gas steam reforming hydrogen production device - Google Patents
Natural gas steam reforming hydrogen production device Download PDFInfo
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- CN210150715U CN210150715U CN201920934501.5U CN201920934501U CN210150715U CN 210150715 U CN210150715 U CN 210150715U CN 201920934501 U CN201920934501 U CN 201920934501U CN 210150715 U CN210150715 U CN 210150715U
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Abstract
The utility model discloses a natural gas steam reforming hydrogen production device, which belongs to the technical field of hydrocarbon steam reforming hydrogen production and comprises a multi-effect heat exchanger, a feed gas preheating coil, a desulphurization unit, a feed gas steam mixed gas preheating coil, a reformer and a reformed gas heat exchange tube nest which are sequentially connected through pipelines; the converter is provided with a flue; the multi-effect heat exchanger comprises a water supply shell and a flue gas heat exchange tube array arranged in the water supply shell, wherein the inlet of the flue gas heat exchange tube array is connected with a flue of the reforming furnace, and the reforming gas heat exchange tube array is arranged in the water supply shell; the feed water shell is provided with a water inlet and a steam outlet, and the steam outlet is connected to the feed gas-steam mixed gas preheating coil. The method changes the traditional hydrogen production process equipment thinking, optimizes the heat exchange network, reduces the used equipment, saves the occupied land, and has low heat loss and high heat exchange efficiency.
Description
Technical Field
The utility model belongs to the technical field of hydrogen production by hydrocarbon steam reforming, in particular to a hydrogen production device by natural gas steam reforming.
Background
In the existing natural gas hydrogen production process and equipment, flue gas exchanges heat with raw material gas-steam mixed gas, raw material gas, water and air in sequence, and is finally discharged into the atmosphere through a draught fan, and the heat exchange equipment is independent in the process. And the convection section is provided with a flue gas waste heat boiler independently to exchange heat between the heat of the flue gas and the water fed by the flue gas waste heat boiler. The heat recovery of the converted gas is also the waste heat recovery through an independent converted gas waste heat boiler, namely, the heat exchange of the converted gas and water is also an independent device. Therefore, the traditional process has more equipment, large occupied area and large heat loss.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a natural gas steam reforming hydrogen plant to flue gas heat transfer and transformation gas heat transfer set up independent indirect heating equipment respectively in solving traditional hydrogen manufacturing technology and equip, and the equipment that exists is many, area is big, the problem that the heat loss is big.
For realizing the purpose of the utility model, the technical proposal adopted is that: a natural gas steam reforming hydrogen production device comprises a multi-effect heat exchanger, a feed gas preheating coil, a desulfurization unit, a feed gas steam mixed gas preheating coil, a reforming furnace and a reforming gas heat exchange tube bank, wherein the feed gas preheating coil, the desulfurization unit, the feed gas steam mixed gas preheating coil, the reforming furnace and the reforming gas heat exchange tube bank are sequentially connected through a pipeline; the converter is provided with a flue; the multi-effect heat exchanger comprises a water supply shell and a flue gas heat exchange tube array arranged in the water supply shell, wherein the inlet of the flue gas heat exchange tube array is connected with a flue of the reforming furnace, and the reforming gas heat exchange tube array is arranged in the water supply shell; the feed water shell is provided with a water inlet and a steam outlet, and the steam outlet is connected to the feed gas-steam mixed gas preheating coil.
As a further alternative, the system also comprises a flue gas heat exchange channel, wherein the inlet of the flue gas heat exchange tube array is connected with the flue of the reformer through the flue gas heat exchange channel; the feed gas preheating coil and the feed gas steam mixed gas preheating coil are arranged in the flue gas heat exchange channel.
As a further alternative, the flue gas heat exchange channel is provided in the water supply housing.
As a further alternative, the flue gas heat exchange channel is disposed within the reformer.
As a further alternative, the reformer is provided with a burner for providing heat for the reforming reaction within the reformer.
As a further alternative, the combustor further comprises an air preheater for providing preheated air to the combustor, and the outlet of the flue gas heat exchange tube array is connected to the air preheater.
As a further alternative, there is also a feed water preheater having a feed water inlet and a feed water outlet, the feed water outlet being connected to the water inlet of the feed water housing.
As a further alternative, the system also comprises a medium-variable furnace, the feed water preheater is also provided with a heat exchange air inlet and a heat exchange air outlet, and the medium-variable furnace is connected between the outlet of the reformed gas heat exchange tube and the heat exchange air inlet of the feed water preheater.
As a further alternative, the system also comprises a water-cooling separation unit and a pressure swing adsorption unit, wherein an inlet of the water-cooling separation unit is connected with a heat exchange air outlet of the water supply preheater, and an outlet of the water-cooling separation unit is connected with an inlet of the pressure swing adsorption unit.
The utility model has the advantages that: different from in the past adopt independent equipment to realize heat transfer separately in traditional technology and the device respectively, the utility model discloses a hydrogen plant changes traditional hydrogen manufacturing technology thinking, optimizes the heat transfer network through the heat transfer integration to the multiple-effect heat exchanger with the flue gas of reborner and the heat transfer of the reborner gas and water, reduces the use equipment, saves to take up an area of, and the heat loss of device is low, heat exchange efficiency is high, finally accomplishes energy-conservation, reduction device consumption.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the description of the embodiments will be briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a natural gas steam reforming hydrogen production plant provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a natural gas steam reforming hydrogen production apparatus provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of another configuration of a natural gas steam reforming hydrogen production apparatus provided by an embodiment of the present invention;
reference numerals: 1. a multi-effect heat exchanger; 2. preheating a coil pipe by using raw material gas; 3. a desulfurization unit; 4. preheating a coil pipe by using a raw material gas and steam mixed gas; 5. a reformer; 6. a reformed gas heat exchange tube array; 7. a water supply housing; 8. a flue gas heat exchange tube array; 9. a conversion tube; 10. a raw material gas and steam mixed gas main pipe; 11. a flue gas heat exchange channel; 12. a burner; 13. an air preheater; 14. a feed water preheater; 15. a medium transformer furnace; 16. a water-cooled separation unit; 17. a pressure swing adsorption unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. It is to be understood that the drawings are designed solely for the purposes of illustration and description and not as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Fig. 1 to fig. 3 show a natural gas steam reforming hydrogen production apparatus provided by the present invention, which comprises a multiple-effect heat exchanger 1, and a raw material gas preheating coil 2, a desulfurization unit 3, a raw material gas steam mixture preheating coil 4, a reformer 5, and a reformed gas heat exchange tube array 6, which are sequentially connected by a pipeline; the reformer 5 has a flue; the multi-effect heat exchanger 1 comprises a water supply shell 7 and a flue gas heat exchange tube array 8 arranged in the water supply shell 7, wherein the inlet of the flue gas heat exchange tube array 8 is connected with a flue of the reforming furnace 5, and the reforming gas heat exchange tube array 6 is arranged in the water supply shell 7; the feed water housing 7 has a water inlet and a steam outlet connected to the feed gas steam mixture preheating coil 4.
Water enters the water supply shell 7 through the water inlet, exchanges heat with the flue gas heat exchange tubes 8 and the reformed gas heat exchange tubes 6 in the water supply shell 7, and generated steam flows into the feed gas-steam mixed gas preheating coil 4 through the steam outlet. Natural gas is used as raw material gas and is preheated by a raw material gas preheating coil 2, the preheated raw material gas enters a desulfurization unit 3, the desulfurized raw material gas flows into a raw material gas and steam mixed gas preheating coil 4 and is mixed with steam, the raw material gas and steam mixed gas is preheated by the raw material gas and steam mixed gas preheating coil 4, the preheated raw material gas and steam mixed gas enters a reformer 5 and reacts under the action of a catalyst, the reformed gas obtained by the reaction enters a reformed gas heat exchange tube array 6 and exchanges heat with water in a water supply shell 7, and the cooled reformed gas flows out through an outlet of the reformed gas heat exchange tube array 6, as shown in figure 1. The flue gas of the reformer 5 enters a flue gas heat exchange tube 8 of the multi-effect heat exchanger 1, exchanges heat with the water in the water supply shell 7 and is discharged. The heat exchange of the flue gas and the water and the heat exchange of the converted gas and the water are integrated in one device, so that the occupied area is saved, the device is suitable for a small hydrogen production device, the heat exchange efficiency is higher, and the device is more energy-saving. The cooled converted gas can be subjected to shift reaction in a converter, and then purified by a water-cooling separation and pressure swing adsorption unit to obtain hydrogen.
The reforming furnace 5 is internally provided with a reforming tube 9, the preheated feed gas and steam mixed gas enters the reforming tube 9, and the reformed gas obtained by reaction enters the reformed gas heat exchange tube array 6 through the outlet of the reforming tube 9. The inlet of the feed gas-steam mixed gas preheating coil 4 is connected with a feed gas-steam mixed gas main pipe 10, the outlet of the desulfurization unit 3 and the steam outlet of the multi-effect heat exchanger 1 are respectively connected with the feed gas-steam mixed gas main pipe 10, and the feed gas-steam mixed gas is formed in the feed gas-steam mixed gas main pipe 10.
The device also comprises a flue gas heat exchange channel 11, wherein the inlet of the flue gas heat exchange tube array 8 is connected with the flue of the reformer 5 through the flue gas heat exchange channel 11; the feed gas preheating coil 2 and the feed gas steam mixed gas preheating coil 4 are arranged in the flue gas heat exchange channel 11. The raw gas and the raw gas steam mixed gas exchange heat with the flue gas, and the heat exchange of the raw gas and the raw gas steam mixed gas is integrated by utilizing the heat of the flue gas through the flue gas heat exchange channel 11.
The flue gas heat exchange channel 11 can be arranged in the water supply shell 7, namely, the inlet of the flue gas heat exchange channel 11 is connected with the flue of the reforming furnace 5, the outlet of the flue gas heat exchange channel is connected with the flue gas heat exchange tube array 8, and the inner wall of the flue gas heat exchange channel 11 can be provided with a heat insulation layer, which is not shown in the figure and is specifically arranged according to the requirement. The raw gas heat exchange, the raw gas-steam mixed gas heat exchange and the flue gas heat exchange are integrated in a multi-effect heat exchanger 1, as shown in figure 2. The flue gas heat exchange channel 11 can also be arranged in the reformer 5, and specifically can be directly arranged in a flue of the reformer 5, that is, the heat exchange of the raw material gas and the heat exchange of the raw material gas-steam mixed gas are integrated into the reformer 5, as shown in fig. 3.
The reformer 5 is provided with a burner 12 which provides heat for the reforming reaction within the furnace. The device also comprises an air preheater 13 for providing preheated air for the combustor 12, and the outlet of the flue gas heat exchange tube array 8 is connected to the air preheater 13. The flue gas exchanges heat with the air needed by the combustor 12, the preheated air enters the combustor 12, and the cooled flue gas is discharged.
The apparatus may also include a feed water preheater 14 having a feed water inlet and a feed water outlet, the feed water outlet being connected to the water inlet of the feed water housing 7. The feedwater preheater 14 may be a desalted water preheater. The device also comprises a medium transformer furnace 15, the feed water preheater 14 is also provided with a heat exchange air inlet and a heat exchange air outlet, and the medium transformer furnace 15 is connected between the outlet of the reformed gas heat exchange tube array 6 and the heat exchange air inlet of the feed water preheater 14. The medium pressure gas from the medium pressure furnace 15 exchanges heat with the feed water in the feed water preheater 14, the preheated feed water enters the multi-effect heat exchanger 1, and the cooled medium pressure gas enters the subsequent flow through a heat exchange gas outlet of the feed water preheater 14.
When the flue gas heat exchange channel 11 is arranged in the water supply shell 7, heat exchange of flue gas, feed gas steam mixed gas, water, reformed gas and the like is completely integrated in the multi-effect heat exchanger 1, high integration is realized, the occupied area is greatly saved, the heat loss of the device is low, the heat efficiency is high, energy is saved, and the consumption of the device is reduced.
The device also comprises a water-cooling separation unit 16 and a pressure swing adsorption unit 17, wherein the inlet of the water-cooling separation unit 16 is connected with the heat exchange gas outlet of the feed water preheater 14, and the outlet of the water-cooling separation unit 16 is connected with the inlet of the pressure swing adsorption unit 17.
The raw gas enters a raw gas preheating coil 2 in a flue gas heat exchange channel 11 to be preheated to a certain temperature, enters a desulfurization unit 3 to remove organic sulfur and inorganic sulfur in the natural gas, is mixed with steam, then is removed from a raw gas-steam mixed gas preheating coil 4 to exchange heat with the flue gas from a reformer 5, the raw gas-steam mixed gas after heat exchange enters a reformer tube 9 to react under the action of a nickel-based catalyst, the reformed gas obtained by the reaction enters a reformed gas heat exchange tube array 6 of a multi-effect heat exchanger 1 to exchange heat with shell pass water of the multi-effect heat exchanger 1, the cooled reformed gas enters an intermediate converter 15 to carry out conversion reaction to obtain intermediate converted gas, the intermediate converted gas and desalted water carry out heat exchange, then enters a water-cooling separation unit to be continuously cooled, unreacted process condensate is separated to obtain intermediate converted gas in a dry basis state, and the intermediate converted gas in a dry basis state enters a pressure swing adsorption unit, purifying to obtain hydrogen, and burning by a burner 12 at the top of the desorption gas rotary furnace 5.
The desalted water enters a desalted water preheater and then enters a water supply shell 7 of the multi-effect heat exchanger 1 to exchange heat with the flue gas and the reformed gas to generate steam. The reformer 5 is a top-burning negative pressure reformer, fuel mainly comprises desorption gas from a pressure swing adsorption unit, and the insufficient part is supplemented by fuel gas; when the flue gas heat exchange channel 11 is arranged in the water supply shell 7, flue gas of the reformer 5 exchanges heat with the raw gas-steam mixed gas preheating coil 4, the raw gas preheating coil 2 and the flue gas heat exchange tube bank 8 in the multi-effect heat exchanger 1, and finally exchanges heat with air through the air preheater 13 and is discharged into the atmosphere; air required by combustion of the reformer 5 enters the combustor 12 after exchanging heat with flue gas through the air preheater 13.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (9)
1. A natural gas steam reforming hydrogen production device is characterized by comprising a multi-effect heat exchanger, a feed gas preheating coil, a desulfurization unit, a feed gas steam mixed gas preheating coil, a reforming furnace and a reformed gas heat exchange tube bank, wherein the feed gas preheating coil, the desulfurization unit, the feed gas steam mixed gas preheating coil, the reforming furnace and the reformed gas heat exchange tube bank are sequentially connected through a pipeline; the converter is provided with a flue; the multi-effect heat exchanger comprises a water supply shell and a flue gas heat exchange tube array arranged in the water supply shell, wherein the inlet of the flue gas heat exchange tube array is connected with a flue of the reforming furnace, and the reforming gas heat exchange tube array is arranged in the water supply shell; the feed water shell is provided with a water inlet and a steam outlet, and the steam outlet is connected to the feed gas-steam mixed gas preheating coil.
2. The natural gas steam reforming hydrogen production device as claimed in claim 1, further comprising a flue gas heat exchange channel, wherein the inlet of the flue gas heat exchange tube array is connected with the flue of the reformer through the flue gas heat exchange channel; the feed gas preheating coil and the feed gas steam mixed gas preheating coil are arranged in the flue gas heat exchange channel.
3. The natural gas steam reforming hydrogen production plant of claim 2, wherein the flue gas heat exchange channel is disposed in the water supply housing.
4. The natural gas steam reforming hydrogen production plant of claim 2, wherein the flue gas heat exchange channel is arranged in the reformer.
5. The natural gas steam reforming hydrogen plant as defined in claim 1, wherein the reformer is provided with a burner for supplying heat for the reforming reaction in the reformer.
6. The natural gas steam reforming hydrogen production plant of claim 5, further comprising an air preheater for providing preheated air to the burner, wherein the outlet of the flue gas heat exchange tube array is connected to the air preheater.
7. The natural gas steam reforming hydrogen production apparatus according to claim 1 or 3, further comprising a feed water preheater having a feed water inlet and a feed water outlet, the feed water outlet being connected to the water inlet of the feed water housing.
8. The natural gas steam reforming hydrogen production device as claimed in claim 7, further comprising a medium-pressure shift furnace, wherein the feed water preheater is further provided with a heat exchange air inlet and a heat exchange air outlet, and the medium-pressure shift furnace is connected between the outlet of the reformed gas heat exchange tube and the heat exchange air inlet of the feed water preheater.
9. The natural gas steam reforming hydrogen production device as claimed in claim 8, further comprising a water-cooling separation unit and a pressure swing adsorption unit, wherein an inlet of the water-cooling separation unit is connected with a heat exchange gas outlet of the feed water preheater, and an outlet of the water-cooling separation unit is connected with an inlet of the pressure swing adsorption unit.
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| CN201920934501.5U CN210150715U (en) | 2019-06-20 | 2019-06-20 | Natural gas steam reforming hydrogen production device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813454A (en) * | 2021-03-03 | 2021-05-18 | 中海石油气电集团有限责任公司 | Natural gas reforming and carbon dioxide combined hydrogen production power generation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813454A (en) * | 2021-03-03 | 2021-05-18 | 中海石油气电集团有限责任公司 | Natural gas reforming and carbon dioxide combined hydrogen production power generation system and method |
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