CN219079406U - System for adjusting hydrogen-carbon ratio in synthesis gas - Google Patents
System for adjusting hydrogen-carbon ratio in synthesis gas Download PDFInfo
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- CN219079406U CN219079406U CN202320256368.9U CN202320256368U CN219079406U CN 219079406 U CN219079406 U CN 219079406U CN 202320256368 U CN202320256368 U CN 202320256368U CN 219079406 U CN219079406 U CN 219079406U
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Abstract
The utility model discloses a system for adjusting the hydrogen-carbon ratio in synthesis gas, which comprises a synthesis gas conveying pipeline, a fiber bundle membrane separator and an aromatic hydrocarbon raw material gas storage tank; the gas outlet at the top of the fiber bundle membrane separator is communicated with the gas inlet of the aromatic hydrocarbon raw material gas storage tank through a conveying pipe, and the synthetic gas conveying pipeline is communicated with the conveying pipe through a branch pipe; a hydrogen-carbon ratio analyzer is arranged on a conveying pipe at the air inlet of the aromatic hydrocarbon raw material gas storage tank, and a regulating valve is arranged on a branch pipe; the signal output end of the hydrogen-carbon ratio analyzer is communicated with the signal input end of the controller through signals, and the signal output end of the controller is communicated with the signal input end of the regulating valve through signals. The utility model has the advantages that: the utility model has simple structure, easy realization, simple flow, convenient operation, stable operation and low energy consumption of the compressor, reduces investment and maintenance cost, improves the stability of production operation and reduces the waste of effective gas and the energy consumption of the compressor.
Description
Technical field:
the utility model relates to the technical field of chemical industry, in particular to a system for adjusting the hydrogen-carbon ratio in synthesis gas.
The background technology is as follows:
the preparation of aromatic hydrocarbons from synthesis gas is an emerging new material production technology, namely, synthesis of aromatic hydrocarbons is carried out by taking synthesis gas in methanol synthesis production as a raw material and through a fluidized bed reactor. In the reaction for synthesizing aromatic hydrocarbon, an effective gas H is required 2 The ratio of CO to CO is 1:1. but H in the synthesis gas component from methanol production 2 The ratio of CO to CO is 2:1. therefore, the synthesis gas cannot be completely reacted when passing through the fluidized bed reactor for the first time, the single-pass conversion rate of the reaction is between 40 and 60 percent, and unreacted gas from the reactor needs to be sent back to the reactor for reaction after being pressurized by gas circulation to improve the total conversion rate. This results in excess H 2 Build up in the system is continued, reducing the CO concentration causing a decrease in the reaction rate.
How to synthesize H in the synthesis gas from methanol 2 The ratio of CO to CO is adjusted to 1 required for aromatic hydrocarbon synthesis: 1, and becomes an important regulating means and research direction for preparing aromatic hydrocarbon from synthetic gas.
At present, researchers use PSA pressure swing adsorption technology and molecular sieve to recycle redundant H in raw material gas by means of pressure adsorption and pressure reduction 2 After the extraction, the hydrogen-carbon ratio in the aromatic hydrocarbon feed gas is adjusted. Because the pressure of PSA desorption is lower, a compressor with larger power consumption is needed to be pressurized to be used as aromatic hydrocarbon raw material gas. Therefore, the method has the advantages of complex equipment, high maintenance cost and low production capacity.
The utility model comprises the following steps:
the utility model aims to provide a system for adjusting the hydrogen-carbon ratio in the synthesis gas, which has the advantages of simple structure, convenient operation and reduced investment and maintenance cost.
The utility model is implemented by the following technical scheme: the patent aims to provide a system for adjusting the hydrogen-carbon ratio in synthesis gas, which comprises a synthesis gas conveying pipeline, a fiber bundle membrane separator and an aromatic hydrocarbon raw material gas storage tank; the synthesis gas conveying pipeline is communicated with the air inlet of the fiber bundle membrane separator, the air outlet at the top of the fiber bundle membrane separator is communicated with the air inlet of the aromatic hydrocarbon raw material gas storage tank through a conveying pipe, and the synthesis gas conveying pipeline is communicated with the conveying pipe through a branch pipe; a hydrogen-carbon ratio analyzer is arranged on the conveying pipe at the air inlet of the aromatic hydrocarbon raw material gas storage tank, and a regulating valve is arranged on the branch pipe; the signal output end of the hydrogen-carbon ratio analyzer is communicated with the signal input end of the controller through signals, and the signal output end of the controller is communicated with the signal input end of the regulating valve through signals.
Further, an air outlet at the bottom of the fiber bundle membrane separator is communicated with an air inlet of a hydrogen compressor, and an air outlet of the hydrogen compressor is communicated with an air inlet of the methanol synthesis device.
The utility model has the advantages that: the utility model has simple structure and easy realization, and redundant H in the synthesis gas is separated by the fiber bundle membrane separator 2 Removing to adjust the hydrogen-carbon ratio of the feed gas for aromatic hydrocarbon production; compared with the traditional method, the flowThe method is simple, convenient to operate, stable in operation and low in energy consumption of the compressor, investment and maintenance cost are reduced, the stability of production operation is improved, and the waste of effective gas and the energy consumption of the compressor are reduced; solves the problem that the hydrogen-carbon ratio in the feed gas for aromatic hydrocarbon production is difficult to adjust.
Description of the drawings:
in order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a system connection block diagram of the present utility model.
The device comprises a synthesis gas conveying pipeline 1, a fiber bundle membrane separator 2, an aromatic hydrocarbon raw material gas storage tank 3, a conveying pipe 4, a branch pipe 5, a hydrogen-carbon ratio analyzer 6, a regulating valve 7, a controller 8, a hydrogen compressor 9 and a methanol synthesis device 10.
The specific embodiment is as follows:
as shown in fig. 1, a system for adjusting the hydrogen-carbon ratio in synthesis gas comprises a synthesis gas conveying pipeline 1, a fiber bundle membrane separator 2 and an aromatic hydrocarbon raw material gas storage tank 3; the synthesis gas conveying pipeline 1 is communicated with an air inlet of the fiber bundle membrane separator 2, an air outlet at the top of the fiber bundle membrane separator 2 is communicated with an air inlet of the aromatic hydrocarbon raw material gas storage tank 3 through a conveying pipe 4, and the synthesis gas conveying pipeline 1 is communicated with the conveying pipe 4 through a branch pipe 5; a hydrogen-carbon ratio analyzer 6 is arranged on a conveying pipe 4 at the air inlet of the aromatic hydrocarbon raw material gas storage tank 3, and a regulating valve 7 is arranged on a branch pipe 5; the signal output end of the hydrogen-carbon ratio analyzer 6 is in signal communication with the signal input end of the controller 8, and the signal output end of the controller 8 is in signal communication with the signal input end of the regulating valve 7.
The air outlet at the bottom of the fiber bundle membrane separator 2 is communicated with the air inlet of the hydrogen compressor 9, and the air outlet of the hydrogen compressor 9 is communicated with the air inlet of the methanol synthesis device 10.
Working principle: from the methanol synthesis stepOf (2) synthesis gas of H 2 The ratio of CO to CO is 2:1, the pressure is 5.4MPa, and the mixture enters a fiber bundle membrane separator 2, and most of H in the synthesis gas is generated under the action of a fiber bundle membrane 2 The gas which permeates out from the back of the membrane is discharged from the bottom of the fiber bundle membrane separator 2 as hydrogen-rich gas, and is pressurized by the hydrogen compressor 9 and then sent back to the methanol synthesis device 10 for recycling and use in the methanol synthesis production so as to reduce gas waste.
The other gas with poor permeability passing through the fiber bundle membrane separator 2 is taken as non-permeate gas, is discharged from the top and mixed with the branched synthetic gas, and is taken as aromatic hydrocarbon raw material gas to be sent to the aromatic hydrocarbon raw material gas storage tank 3.
Excess H in the synthesis gas by means of a fiber bundle membrane separator 2 2 Removing to adjust the hydrogen-carbon ratio of the feed gas for aromatic hydrocarbon production; compared with the traditional method, the method has the advantages of simple flow, convenient operation, stable operation and low energy consumption of the compressor, reduces investment and maintenance cost, improves the stability of production operation, and reduces the waste of effective gas and the energy consumption of the compressor; solves the problem that the hydrogen-carbon ratio in the feed gas for aromatic hydrocarbon production is difficult to adjust.
The hydrogen-carbon ratio analyzer 6 on the conveying pipe 4 at the air inlet of the arene raw material gas storage tank 3 monitors the hydrogen-carbon ratio in the raw material gas in real time and sends a signal to the controller 8, when the hydrogen-carbon ratio rises or falls, the controller 8 automatically controls the corresponding closing or opening of the regulating valve 7 to realize H in the arene raw material gas 2 Stabilization with CO at 1:1.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (2)
1. The system for adjusting the hydrogen-carbon ratio in the synthesis gas is characterized by comprising a synthesis gas conveying pipeline, a fiber bundle membrane separator and an aromatic hydrocarbon raw material gas storage tank; the synthesis gas conveying pipeline is communicated with the air inlet of the fiber bundle membrane separator, the air outlet at the top of the fiber bundle membrane separator is communicated with the air inlet of the aromatic hydrocarbon raw material gas storage tank through a conveying pipe, and the synthesis gas conveying pipeline is communicated with the conveying pipe through a branch pipe; a hydrogen-carbon ratio analyzer is arranged on the conveying pipe at the air inlet of the aromatic hydrocarbon raw material gas storage tank, and a regulating valve is arranged on the branch pipe; the signal output end of the hydrogen-carbon ratio analyzer is communicated with the signal input end of the controller through signals, and the signal output end of the controller is communicated with the signal input end of the regulating valve through signals.
2. The system for adjusting the hydrogen-to-carbon ratio in a synthesis gas according to claim 1, wherein the gas outlet at the bottom of the fiber bundle membrane separator is in communication with the gas inlet of a hydrogen compressor, and the gas outlet of the hydrogen compressor is in communication with the gas inlet of the methanol synthesis device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320256368.9U CN219079406U (en) | 2023-02-16 | 2023-02-16 | System for adjusting hydrogen-carbon ratio in synthesis gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320256368.9U CN219079406U (en) | 2023-02-16 | 2023-02-16 | System for adjusting hydrogen-carbon ratio in synthesis gas |
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| Publication Number | Publication Date |
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| CN219079406U true CN219079406U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320256368.9U Active CN219079406U (en) | 2023-02-16 | 2023-02-16 | System for adjusting hydrogen-carbon ratio in synthesis gas |
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- 2023-02-16 CN CN202320256368.9U patent/CN219079406U/en active Active
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