CN214764366U - Device and system for recycling desorption gas generated in hydrogen production by methanol cracking - Google Patents
Device and system for recycling desorption gas generated in hydrogen production by methanol cracking Download PDFInfo
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- CN214764366U CN214764366U CN202120942693.1U CN202120942693U CN214764366U CN 214764366 U CN214764366 U CN 214764366U CN 202120942693 U CN202120942693 U CN 202120942693U CN 214764366 U CN214764366 U CN 214764366U
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Abstract
The embodiment of the application provides a device and a system for recycling desorption gas for hydrogen production by methanol cracking. The device for recycling the desorption gas for preparing hydrogen by methanol cracking is arranged behind an adsorption device for preparing hydrogen by methanol cracking and comprises the following devices which are communicated in sequence: the device comprises a first analysis gas buffer tank, a second analysis gas buffer tank and an analysis gas compressor; the first desorption gas buffer tank is communicated with the adsorption equipment through a first pipeline, and a first program control valve is arranged on the first pipeline; the second desorption gas buffer tank is communicated with the adsorption equipment through a second pipeline, and a second program control valve is arranged on the second pipeline. The device and the system solve the pollution problem that the direct unloading of understanding gassing caused the environment on the one hand, on the other hand, regard waste gas as raw materials and recycle, reduce the unit consumption of methyl alcohol, practiced thrift raw materials resource, reduced manufacturing cost.
Description
Technical Field
The application relates to the technical field of alcohol cracking, in particular to a device and a system for recycling hydrogen evolution gas produced by methanol cracking.
Background
In the process of preparing hydrogen by cracking methanol, the obtained hydrogen can be mixed with various impurity gases, and the hydrogen is usually purified by a pressure swing adsorption technology in the process. At present pressure swing adsorption device when carrying out the purification to hydrogen, at the contrary in-process of putting, can directly empty carbon monoxide, carbon dioxide, and a minute amount of methane and hydrogen to the atmosphere. Carbon monoxide and hydrogen are used as intermediate products and final products of methanol cracking and are directly discharged into the atmosphere, so that not only can environmental pollution be caused, but also waste of available energy is caused. And the analyzed gas and the air can form an explosive mixture and are continuously discharged into the atmosphere, so that the vent pipe can be ignited, and potential safety hazards are brought. Therefore, a device for recycling the desorption gas is needed to solve the problem of environmental pollution caused by direct evacuation of the desorption gas.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a device for recycling hydrogen evolution gas produced by methanol cracking, and aims to solve or alleviate one or more technical problems in the prior art.
As an aspect of the embodiments of the present application, an embodiment of the present application provides a desorption gas recycling apparatus for hydrogen production by methanol cracking, which is disposed behind an adsorption device for hydrogen production by methanol cracking, and includes the following devices that are sequentially connected: the device comprises a first analysis gas buffer tank, a second analysis gas buffer tank and an analysis gas compressor;
the first desorption gas buffer tank is communicated with the adsorption equipment through a first pipeline, and a first program control valve is arranged on the first pipeline;
the second desorption gas buffer tank is communicated with the adsorption equipment through a second pipeline, and a second program control valve is arranged on the second pipeline.
In one embodiment, a first filter is further provided between the first stripping gas buffer tank and the first program control valve.
In one embodiment, a pressure gauge is disposed on a pipeline communicated between the first filter and the first desorption gas buffer tank.
In one embodiment, a third desorption gas buffer tank is communicated between the second desorption gas buffer tank and the desorption gas compressor; and a water washing tower is communicated with the back of the desorption gas compressor.
In one embodiment, the following devices are further communicated between the desorption gas compressor and the water washing tower: a second filter.
In one embodiment, a valve is provided between each device.
In one embodiment, the valve between the first and second resolving gas buffer tanks comprises in order a front stop valve, a pressure reducing valve and a rear stop valve.
In one embodiment, the first stripping gas buffer tank has a volume of 75-85m3The volume of the second desorption gas buffer tank is 3-5m3(ii) a The volume of the first analysis gas buffer tank and the second analysis gas buffer tank is determined according to the gas amount of the analysis gas generated in the early stage of reverse discharge.
As another aspect of the embodiments of the present application, an embodiment of the present application provides a system for recycling hydrogen evolution gas produced by methanol cracking, including: the analysis gas recovery and reuse apparatus according to any of the above embodiments.
The device and the system for recycling the hydrogen evolution gas produced by methanol cracking solve the problem of pollution to the environment caused by direct emptying of the evolution gas on the one hand, and on the other hand recycle the waste gas as the raw material, thereby reducing the unit consumption of methanol, saving raw material resources and reducing the production cost.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.
Drawings
In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.
Fig. 1 shows a schematic diagram of a desorption gas recycling device for hydrogen production by methanol cracking according to an embodiment of the application.
Reference numerals:
1-a first programmable valve; 2-a second programmable valve; 3-a first filter;
4-a first stripping gas buffer tank; 5-a pressure reducing valve; 6-a second desorption gas buffer tank;
7-a third stripping gas buffer tank; 8-desorption gas compressor; 9-a second filter;
10-a water washing tower; 11-inverse placing tube.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
Fig. 1 shows a schematic diagram of a desorption gas recycling device for hydrogen production by methanol cracking according to an embodiment of the present application. As shown in fig. 1, the apparatus may include: the device comprises a first program control valve 1, a second program control valve 2 and the following devices communicated in sequence: the device comprises a first filter 3, a first analysis gas buffer tank 4, a second analysis gas buffer tank 6, a third analysis gas buffer tank 7, an analysis gas compressor 8, a second filter 9 and a water scrubber 10.
Since the adsorption equipment for producing hydrogen by methanol cracking can produce white powder after pressure swing adsorption, the first filter 3, the second filter 9 and the water washing tower 10 are arranged in the device for recycling and reusing the resolved gas to precipitate the white powder, so that the whole device is prevented from being blocked. The first desorption gas buffer tank 4, the second desorption gas buffer tank 6, and the third desorption gas buffer tank 7 are provided to stabilize the work of the hydrogen compressor.
Wherein, first analysis gas buffer tank 4 with adsorption equipment is linked together through first pipeline, be provided with first program control valve 1 on the first pipeline.
The second desorption gas buffer tank 6 is communicated with the adsorption equipment through a second pipeline, and a second program control valve 2 is arranged on the second pipeline.
In one example, a pressure gauge is provided on a line communicating between the first filter 3 and the first desorption gas buffer tank 4.
In one example, a valve is provided between each device.
In one example, the valves between the first and second stripping gas buffer tanks 4, 6 comprise in order a front stop valve, a pressure reducing valve 5 and a rear stop valve.
In one example, the first stripping gas buffer tank 4 has a volume of 80m3The volume of the second analysis gas buffer tank 6 is 4m3。
In another aspect of the embodiments of the present application, there is provided a system for recovering and reusing a hydrogen evolution gas produced by methanol cracking, including the apparatus for recovering and reusing a hydrogen evolution gas according to any one of the embodiments described above.
The analytic gas recycling apparatus provided by the embodiment of the application controls the analytic gas generated by pressure swing adsorption through two program control valves at the tail end of an adsorption tower pipeline, and the analytic gas enters an analytic gas buffer system in two ways, wherein one way is as follows: since the desorption gas washes off part of the adsorbent in the adsorption tower under high pressure, the desorption gas is introduced into the first filter 3 to filter the adsorbent caused by the desorption gas, and further, the desorption gas generated in the early stage of reverse discharge is large in amount, so that the desorption gas is introduced into the adsorption tower at 80m3Buffer tank (i.e. first stripping gas buffer tank 4, incoming gas with 12.075 square), then 4m3Buffer tank (i.e., second desorption gas buffer tank 6, controlled by 4m by regulating valve)3The buffer tank pressure is 18 kPa); the other path is as follows: when the pressure of the desorption gas is about 25kPa, the pressure is directly 4m3A buffer tank (i.e., second stripping gas buffer tank 6, with 0.495 square of incoming gas); then the gas enters a desorption gas inlet buffer tank (a third desorption gas buffer tank 7); then enters a desorption gas compressor 8, enters a second filter 9 after being pressurized by the compressor, passes through a water washing tower 10 to wash out a small amount of adsorbent, a small amount of methane and other impurities brought from the compressor, and finally is sent to a methanol cracking system for recycling. Therefore, the pressurized desorption gas from the pressure swing adsorption is ensured to be changed into a stable normal pressure state before entering the desorption gas compressor 8, and the impact on the compressor is reduced.
The parameters of the first filter 3 described above are as follows: 1) model NYB-30; 2) the filtration area is as follows: 30 square meters; 3) filter cake volume: 600L; rated working pressure: 0.1-0.4 MPa; the highest working pressure: 0.5 MPa; working temperature: less than or equal to 150 ℃; volume: 2300L.
The parameters of the second filter 9 described above are as follows: 1) designing pressure: 2.5 MPa; 2) working pressure: 2.2 MPa; 3) volume: 1.18m3(ii) a 4) Design temperature: 60 degrees. This filter relies on an adsorbent to filter the stripping gas.
The parameters of the desorption gas hydrogen compressor 8 are as follows: 1) model DW-15/23; 2) the power is 220 kW; 3) flow rate: 900m3H; 4) outlet pressure: 2.3 MPa.
The two program control valves at the tail end of the adsorption tower pipeline are respectively a first program control valve 1 and a second program control valve 2 to controlThe analysis gas enters the analysis gas buffer system in two paths. The first programmable valve 1 controls the high pressure gas (about 0.15MPa) coming out of the adsorption column, and the second programmable valve 2 controls the low pressure gas (about 25 kPa). The first filter 3 is provided with an inlet pipeline and an outlet pipeline, and the outlet pipeline is connected with 80m3The buffer tank and the outlet pipeline are provided with a pressure gauge. 80m3The outlet of the buffer tank is provided with a front stop valve, a rear stop valve and a pressure reducing valve 5 (regulating valve) which are connected with 4m3A buffer tank, and a secondary line for maintenance of the pressure reducing valve 5 (regulating valve). 4m3The buffer tank is connected with a desorption gas inlet buffer tank (a third desorption gas buffer tank 7), the pressure of the buffer tank is about 0.001MPa, and the requirement of the inlet pressure of a desorption gas compressor 8 is met. A desorption gas outlet filter (second filter 9) is provided between the desorption gas compressor 8 and the water washing column 10. The desorbed gas condensed by the desorption machine passes through a desorbed gas outlet filter to filter impurities such as carbon dioxide. After passing through the desorption gas outlet filter, the desorption gas still needs to enter a desorption gas washing tower, and a small amount of adsorbent and a small amount of methane are further washed away, so that the desorption gas can enter a methanol cracking system.
Through the operation, the desorption gas generated after pressure swing adsorption enters the desorption gas buffer system in two paths, finally enters the desorption gas compressor 8, is pressurized by the compressor and then is sent to the methanol cracking system, and carbon monoxide and a small amount of hydrogen are reused, so that the purposes of recycling and reusing the desorption gas generated by pressure swing adsorption of methanol cracking and reducing the cost are realized.
Other configurations of the methanol cracking hydrogen production gas separation recycling device and system of the above embodiments can be adopted in various technical schemes known to those skilled in the art now and in the future, and will not be described in detail herein.
In the description of the present specification, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present application, and these should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a device is recycled to desorption gas of methyl alcohol schizolysis hydrogen manufacturing, sets up behind the adsorption equipment of methyl alcohol schizolysis hydrogen manufacturing, its characterized in that, the device is including the following equipment that communicates in proper order: a first desorption gas buffer tank (4), a second desorption gas buffer tank (6) and a desorption gas compressor (8);
the first desorption gas buffer tank (4) is communicated with the adsorption equipment through a first pipeline, and a first program control valve (1) is arranged on the first pipeline;
the second desorption gas buffer tank (6) is communicated with the adsorption equipment through a second pipeline, and a second program control valve (2) is arranged on the second pipeline.
2. The desorption gas recovery and reuse apparatus according to claim 1, wherein a first filter (3) is further provided between the first desorption gas buffer tank (4) and the first program control valve (1).
3. The desorption gas recycling apparatus according to claim 2, wherein a pressure gauge is arranged on a pipeline communicated between the first filter (3) and the first desorption gas buffer tank (4).
4. The analysis gas recovery and reuse apparatus according to claim 1, wherein a third analysis gas buffer tank (7) is further communicated between the second analysis gas buffer tank (6) and the analysis gas compressor (8);
a water washing tower (10) is communicated with the rear part of the desorption gas compressor (8).
5. The desorption gas recovery and reuse apparatus according to claim 4, wherein the following means is further connected between the desorption gas compressor (8) and the water scrubber (10): a second filter (9).
6. The desorption gas recovery/reuse apparatus according to any one of claims 1 to 5, wherein a valve is provided between each of the devices.
7. The stripping gas recycling apparatus according to claim 6, wherein the valve between the first stripping gas buffer tank (4) and the second stripping gas buffer tank (6) comprises a front stop valve, a pressure reducing valve (5) and a rear stop valve in that order.
8. The stripping gas recycling apparatus according to claim 1, wherein the volume of the first stripping gas buffer tank (4) is 75-85m3。
9. The stripping gas recycling apparatus according to claim 1, wherein the volume of the second stripping gas buffer tank (6) is 3-5m3。
10. A system for recovering and recycling a hydrogen evolution gas produced by cracking methanol, comprising the apparatus for recovering and recycling a desorption gas according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120942693.1U CN214764366U (en) | 2021-04-30 | 2021-04-30 | Device and system for recycling desorption gas generated in hydrogen production by methanol cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120942693.1U CN214764366U (en) | 2021-04-30 | 2021-04-30 | Device and system for recycling desorption gas generated in hydrogen production by methanol cracking |
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| Publication Number | Publication Date |
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| CN214764366U true CN214764366U (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120942693.1U Active CN214764366U (en) | 2021-04-30 | 2021-04-30 | Device and system for recycling desorption gas generated in hydrogen production by methanol cracking |
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| CN (1) | CN214764366U (en) |
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- 2021-04-30 CN CN202120942693.1U patent/CN214764366U/en active Active
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