CN218115020U - Natural gas hydrogen production system - Google Patents
Natural gas hydrogen production system Download PDFInfo
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- CN218115020U CN218115020U CN202221987324.5U CN202221987324U CN218115020U CN 218115020 U CN218115020 U CN 218115020U CN 202221987324 U CN202221987324 U CN 202221987324U CN 218115020 U CN218115020 U CN 218115020U
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Abstract
The utility model discloses a natural gas hydrogen manufacturing system changes traditional installation method, solves the quality management and control risk that brings at user site operation, accomplishes whole quality control. It comprises a steam conversion device, a steam conversion device and an adsorption tower (8); the steam conversion device comprises a desulfurizer (1) and a converter (2), the converter (2) is connected with the steam conversion device, the steam conversion device comprises a boiler feed water preheater (4), a converted gas water cooler (5) and a converted gas-water separator (6), and the converted gas-water separator (6) is connected with an adsorption tower (8). The bottom of the converter (2) is provided with a burner (3), and the heat required by methane conversion is provided by burning fuel mixed gas by the bottom burner (3). The utility model discloses realize the standardized production of product, form standard seriation product, the user's of being convenient for equipment management, spare part is general, reduces the running cost of device.
Description
Technical Field
The utility model relates to a hydrogen manufacturing technical field, concretely relates to natural gas hydrogen manufacturing system.
Background
Hydrogen of the formula H 2 The molecular weight is 2.01588, and the gas is extremely easy to burn at normal temperature and normal pressure. Colorless and transparent, odorless and tasteless, and insoluble in water. Hydrogen is the least dense gas known in the world, and has a density of only 1/14 that of air, i.e., at 101.325 kPa (1 atm) and 0 ℃, and a density of 0.089g/L. Therefore, hydrogen can be used as filling gas for airships and hydrogen balloons (because hydrogen has combustibility and is not high in safety, airships are generally filled with helium at present). Hydrogen is the substance with the smallest relative molecular mass, has strong reducibility and is often used as a reducing agent to participate in chemical reactions.
Industry typically produces hydrogen from natural gas or water gas without the use of energy intensive methods of water electrolysis. The prepared hydrogen is largely used for cracking reaction in petrochemical industry and producing ammonia. Hydrogen molecules can enter crystal lattices of a plurality of metals to cause a hydrogen embrittlement phenomenon, so that special materials (such as Mongolian alloy) are required to be used for a storage tank and a pipeline of the hydrogen, and the design is more complicated.
The technologies generally adopted in the hydrogen production industry at present mainly comprise: water electrolysis, methanol cracking, natural gas cracking, ammonia decomposition, coal gasification hydrogen production, hydrogen-rich tail gas recovery and the like. At present, the main sources of hydrogen are divided into three main types, namely traditional hydrogen production by water electrolysis; secondly, purifying hydrogen by using industrial waste gas; thirdly, the hydrogen containing gas source is obtained by using fossil fuels, such as coal gas, natural gas, heavy oil and the like for gas making or propane, liquid ammonia, methanol cracking and the like, and then the hydrogen is separated and purified. Among the three types, the hydrogen production technology which can obtain high-purity hydrogen and is used for industry mainly comprises five types of water electrolysis, natural gas cracking, ammonia decomposition, coal gas production and methanol cracking.
Natural gas resources in China are abundant, and most of natural gas resources are mainly distributed in the west, northwest and other remote placesRegional, leading to higher costs for its compression, transportation, storage, utilization, etc. At present, in order to realize the economic utilization of natural gas, the natural gas is generally used as a primary raw material to be processed to produce compounds such as multi-carbon hydrocarbon and alcohol, and the processing is mainly completed in two steps of firstly converting methane into CO and H 2 (i.e., syngas), and then converting the syngas into multi-carbon hydrocarbons and alcohols, e.g., by F-T synthesis. Almost all carbon-containing compounds can be used to produce synthesis gas, such as coal, natural gas, etc., and the cost for producing synthesis gas can vary, mainly from H 2 The ratio of C0, raw materials, preparation process, scale, system integration level and other factors. The synthesis gas has wide application and can be used as an industrial raw material to produce ammonia, hydrogen, methanol and the like.
The main component of natural gas is methane (CH) 4 ) The hydrogen storage amount is 25 percent, and the mass ratio of hydrogen atoms in the compounds is the largest. Meanwhile, natural gas belongs to one of three fossil energy sources on earth, and has a huge reserve (shale gas and natural ice which are prevalent recently are similar to the shale gas and the natural ice), so that the natural gas is developed into the most mainstream hydrogen preparation technology in industry for a long time and occupies overwhelming advantages in many countries. Because of the stable chemical structure of methane, the industrial method usually adopts cheap and easily available steam and oxygen medium to react with methane to generate synthetic gas, and then prepares hydrogen through chemical conversion and separation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a natural gas hydrogen manufacturing system changes traditional mounting method, solves the quality management and control risk that brings at user site operation, accomplishes whole quality control.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a natural gas hydrogen production system, which is characterized by comprising a steam conversion device, a steam conversion device and an adsorption tower; the steam conversion device comprises a desulfurizer and a converter, the converter is connected with the steam conversion device, and the steam conversion device is connected with the adsorption tower.
Furthermore, a boiler feed water preheater, a reformed gas water cooler and a reformed gas-water separator are arranged in the steam conversion device, and the three devices are connected in sequence.
Furthermore, a burner is arranged at the bottom of the converter, and the heat required by methane conversion is provided by burning fuel mixed gas through the burner at the bottom.
And further, the system also comprises a desalted water preheater, wherein desalted water enters the converter to be subjected to byproduct steam after being preheated by the desalted water preheater and the boiler feed water preheater.
Furthermore, 4-6 adsorption towers are provided, and 1 adsorption tower is in an adsorption state at any time.
Based on the technical scheme, the embodiment of the utility model provides a can produce following technological effect at least:
(1) The whole skid-mounted design changes the traditional field installation mode, and the production management and control of the whole processes of materials, flaw detection, pressure test and the like in a company are completely realized by processing, producing, tubing and prying in the company, so that the quality management and control risk brought by the field construction of a user is fundamentally solved, and the whole-process quality control is really realized.
(2) Products are all prized in a company, the idea of manufacturing a factory in the factory is adopted, after the verification in the factory is qualified, the products are disassembled and assembled according to a set disassembling and assembling scheme and sent to a user site for re-assembling, the site construction amount is small, and the construction period is short.
(3) Degree of automation is very high, can carry out full automatic monitoring and control to the behavior of device through upper system to upload to cloud ware to key data in real time, carry out remote detection, realize on-the-spot unmanned management.
(4) The device has very strong mobility, can be used after being picked and installed again after being moved to a different place according to the specific conditions of a project, realizes the reutilization of equipment, and ensures the maximum benefit of the value of the equipment
(5) According to the demand of the hydrogen filling station on the hydrogen quantity, the standard process design is carried out, and the design principle of combining process modules is adopted, so that the standardized production of products is realized, the standard series products are formed, the equipment management of users is facilitated, the spare parts are universal, and the operation cost of the device is reduced.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
names of corresponding components represented by numerals or letters in the drawings:
1. a desulfurizer; 2. a converter; 3. burning a nozzle; 4. a boiler feed water preheater; 5. a reformed gas water cooler; 6. a reformed gas-water separator; 7. a desalted water preheater; 8. an adsorption tower.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
The utility model aims at realizing the purpose through the following technical proposal, a natural gas hydrogen production system comprises a steam conversion device, a steam conversion device and an adsorption tower 8; the steam conversion device comprises a desulfurizer 1 and a converter 2, the converter 2 is connected with the steam conversion device, the steam conversion device comprises a boiler feed water preheater 4, a converted gas water cooler 5 and a converted gas-water separator 6, and the converted gas-water separator 6 is connected with an adsorption tower 8.
The process of producing hydrogen using a natural gas hydrogen production system is as follows:
step one, raw material pretreatment: pressurizing natural gas outside a battery limit area to 1.6MPa through a compressor, and heating to 380 ℃ through a feed gas preheater of a convection section of a steam reformer;
step two, steam reforming: the natural gas enters a desulfurizer 1 for desulfurization treatment, the sulfur in the feed gas is reduced to be below 0.1PPM in the desulfurizer 1, and the desulfurized feed gas and process steam (3.0 MPa) are mixed according to the H 2 The O/sigma C = 3-4 ratio enters an automatic value adjusting mixed gas preheater, is further preheated to more than 510 ℃, uniformly enters a converter 2 from an upper gas collecting header and an upper pigtail pipe, desalted water is preheated by a desalted water preheater 7 and a boiler feed water preheater 4 and enters the converter 2 to generate byproduct steam, and in a catalyst layer, methane reacts with steam to generate CO and H 2 The heat required by methane conversion is provided by burning fuel mixed gas by a bottom burner;
step three, transformation process: the temperature of the converted gas discharged from the converter is 850 ℃, the high-temperature converted gas enters the tube pass of the waste heat boiler 3 to generate saturated steam of 3.0MPa, the temperature of the converted gas discharged from the waste heat boiler 3 is reduced to 300 ℃, the converted gas sequentially enters the boiler feed water preheater 4, the converted gas water cooler 5 and the converted gas water separator 6, the condensate is separated to obtain process condensate, and the process gas is sent to pressure swing adsorption; the natural gas as fuel is mixed with the desorption gas of pressure swing adsorption, the fuel gas flow entering the fuel gas preheater is adjusted according to the temperature of the gas at the outlet of the reformer, and the fuel gas enters the top burner for combustion after flow adjustment, so that heat is provided for the reformer.
Step four, adsorption process: the pressure swing adsorption is composed of 5 adsorption towers 8, 1 adsorption tower is in an adsorption state at any time, components such as methane, carbon dioxide and carbon monoxide in converted gas are stopped on the surface of the adsorbent, hydrogen is collected from the top of the adsorption tower 8 as a non-adsorption component and is sent out, the adsorbent saturated by impurity components is desorbed from the adsorbent through a regeneration step and is sent to a converter as fuel after being collected, the regeneration step of the adsorption tower 8 is composed of steps of uniform descending, forward releasing, reverse releasing, flushing, uniform ascending and final ascending, the regeneration is finished, the adsorption tower has the capacity of processing the converted gas and producing hydrogen again, and the 5 adsorption tower flows in turns to carry out the steps, so that the purposes of continuously processing the converted gas and continuously producing the hydrogen are guaranteed.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A natural gas hydrogen production system is characterized by comprising a steam conversion device, a steam conversion device and an adsorption tower (8); the steam conversion device comprises a desulfurizer (1) and a converter (2), wherein the converter (2) is connected with a steam conversion device, and the steam conversion device is connected with an adsorption tower (8).
2. The natural gas hydrogen production system according to claim 1, characterized in that: the steam conversion device is internally provided with a boiler feed water preheater (4), a reformed gas water cooler (5) and a reformed gas-water separator (6), which are connected in sequence.
3. The natural gas hydrogen production system according to claim 1, characterized in that: the bottom of the converter (2) is provided with a burner (3), and the heat required by methane conversion is provided by burning fuel mixed gas by the burner (3) at the bottom.
4. The natural gas hydrogen production system according to claim 1, characterized in that: the system also comprises a desalted water preheater (7), and desalted water enters the converter (2) to be subjected to byproduct steam after being preheated by the desalted water preheater (7) and the boiler water supply preheater (4).
5. The natural gas hydrogen production system according to claim 1, characterized in that: 4-6 adsorption towers (8) are arranged, and 1 adsorption tower is in an adsorption state at any time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221987324.5U CN218115020U (en) | 2022-07-29 | 2022-07-29 | Natural gas hydrogen production system |
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| CN202221987324.5U CN218115020U (en) | 2022-07-29 | 2022-07-29 | Natural gas hydrogen production system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159458A (en) * | 2022-07-29 | 2022-10-11 | 四川金星清洁能源装备股份有限公司 | Natural gas hydrogen production system and hydrogen production method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159458A (en) * | 2022-07-29 | 2022-10-11 | 四川金星清洁能源装备股份有限公司 | Natural gas hydrogen production system and hydrogen production method |
| CN115159458B (en) * | 2022-07-29 | 2024-01-16 | 四川金星清洁能源装备股份有限公司 | Natural gas hydrogen production system and hydrogen production method |
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Address after: Welcome international, No.19, Zhenxing West 1st Road, Jinniu District, Chengdu, Sichuan 610000 Patentee after: Sichuan Jinxing Clean Energy Equipment Group Co.,Ltd. Address before: Welcome international, No.19, Zhenxing West 1st Road, Jinniu District, Chengdu, Sichuan 610000 Patentee before: SICHUAN JINXING CLEAN ENERGY EQUIPMENT Co.,Ltd. |