CN217437758U - Low hydrogen-carbon ratio synthesis gas preparation system - Google Patents
Low hydrogen-carbon ratio synthesis gas preparation system Download PDFInfo
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- CN217437758U CN217437758U CN202221345060.3U CN202221345060U CN217437758U CN 217437758 U CN217437758 U CN 217437758U CN 202221345060 U CN202221345060 U CN 202221345060U CN 217437758 U CN217437758 U CN 217437758U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model belongs to the technical field of the chemical industry, in particular to low hydrogen-carbon ratio synthesis gas preparation system. The technical scheme is as follows: the utility model provides a low hydrogen carbon ratio synthetic gas preparation system, includes the heating furnace, the import of heating furnace lets in the feed gas, the export of heating furnace has the pure oxygen converter through the pipe connection, the conversion gas export of pure oxygen converter has waste heat recovery system through the pipe connection, waste heat recovery system's export has the purification piece-rate system through the pipe connection, the carbon dioxide export of purification piece-rate system has carbon dioxide compression system through the pipe connection, carbon dioxide compression system's the other end passes through the import of pipe connection to heating furnace. The utility model provides a system for prepare low hydrogen carbon ratio synthetic gas.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry, in particular to low hydrogen-carbon ratio synthesis gas preparation system.
Background
The synthetic gas with carbon monoxide and hydrogen as main components is an important chemical raw material, and the hydrogen-carbon ratio (H) of different users (or products) to the synthetic gas 2 the/CO) requirements are different. In the traditional synthesis gas preparation process, such as the traditional natural gas one-stage steam reforming process, two-stage steam reforming process and the like, the hydrogen-carbon ratio of the produced synthesis gas is higher, namely, the hydrogen is more and less. With the progress of chemical industry and the development of new products and materials, downstream users have made new requirements for synthesis gas, such as low H requirement for carbon-carbon chemical products such as ethylene glycol, acetic acid, synthetic oil and the like 2 The traditional process cannot meet the requirements of downstream users for the synthesis gas with the ratio of CO.
China promises to CO 2030 2 Emission reaches a peak value, and carbon neutralization is realized in 2060. To achieve the above-mentioned object, various industries are required to doA great effort is made. Among the various greenhouse gases, CO 2 The higher life span (50-200 years) and the ultrahigh emission thereof account for the greatest contribution of the greenhouse effect. And CO 2 Is chemically inert and cannot be removed by photochemical or chemical work. Thus how to reduce CO 2 To CO, to 2 The gas is changed into valuable, the atmospheric environment is improved, and meanwhile, the economic benefit is brought, so that the method becomes a very urgent problem to be solved urgently.
The synthesis gas process develops key equipment, and has a set of perfect control system, so that the load increase and reduction and the production control of the device can be automatically completed under the monitoring of operators. The labor intensity of operators is reduced, the stability and the reliability of the device operation are improved, and the long-period operation of the device is ensured.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems in the prior art, the present invention provides a system for preparing syngas with low hydrogen-carbon ratio.
The utility model discloses the technical scheme who adopts does:
the utility model provides a low hydrogen carbon ratio synthetic gas preparation system, includes the heating furnace, the import of heating furnace lets in the feed gas, the export of heating furnace has the pure oxygen converter through the pipe connection, the conversion gas export of pure oxygen converter has waste heat recovery system through the pipe connection, waste heat recovery system's export has the purification piece-rate system through the pipe connection, the carbon dioxide export of purification piece-rate system has carbon dioxide compression system through the pipe connection, carbon dioxide compression system's the other end passes through the import of pipe connection to heating furnace.
Introducing CO 2 Adding gas into raw gas (natural gas, etc.), adding certain steam according to a certain water-carbon ratio, preheating to a certain temperature in a heating furnace, introducing into a high-temperature autothermal pure oxygen converter with catalytic reaction, and carrying out reactions such as conversion reaction, reforming reaction, etc. in the autothermal pure oxygen converter. By adjusting CO 2 The addition amount, the water-carbon ratio and the operation temperature of the pure oxygen converter are controlled to enable the H 2 CO is 1 to 2.5.
Pure oxygen converterThe reformed gas at the outlet of the furnace sequentially enters a large-scale flexible thin tube plate waste boiler and other waste heat recovery systems, waste heat is recovered in the waste heat recovery systems to generate steam, except for preparation and utilization of the synthesis gas, redundant steam is sent out of a boundary area for comprehensive utilization, and after waste heat recovery, the steam enters a purification and separation system, and CO of the purification and separation system 2 The mixture is pressurized by a carbon dioxide compression system and then added into the raw material gas for recycling, and the insufficient part of CO 2 Can be acquired outside.
The utility model discloses a with CO 2 Added into raw material gas for recycling, can reduce H in synthesis gas 2 The ratio/CO makes it suitable for the requirements of the downstream users.
The new process for preparing the synthesis gas of the utility model is to CO 2 The gas is recycled, and CO is reduced 2 And (4) discharging. The utility model discloses arrange NO of flue gas outward X The content is reduced, and the air pollution is reduced.
As a preferred embodiment of the present invention, the waste heat recovery system includes a flexible thin tube plate waste boiler and an auxiliary waste heat recovery device, the converted gas outlet of the pure oxygen converter and the inlet of the flexible thin tube plate waste boiler are connected by a pipe, the synthesis gas outlet of the flexible thin tube plate waste boiler and the inlet of the auxiliary waste heat recovery device are connected by a pipe, and the outlet of the auxiliary waste heat recovery device and the inlet of the purification and separation system are connected by a pipe. The reformed gas at the outlet of the pure oxygen reforming furnace sequentially enters a large flexible thin tube plate waste boiler and other waste heat recovery systems, and waste heat is recovered in the large flexible thin tube plate waste boiler and the auxiliary waste heat recovery system.
As the preferable proposal of the utility model, one part of the steam generated by the flexible thin tube plate waste boiler is introduced into the inlet of the heating furnace, and the other part is sent out of the battery compartment. The gas sent out from the pure oxygen converter recovers waste heat in a large flexible thin tube plate waste boiler to generate steam, and the redundant steam is sent out from a boundary area for comprehensive utilization except for preparation and utilization of synthesis gas. After waste heat recovery, the synthesis gas enters a purification and separation system and CO of the purification and separation system 2 The mixture is pressurized by a carbon dioxide compression system and then added into the raw material gas for recycling, and the insufficient part of CO 2 Can be acquired outside.
As the preferable scheme of the utility model, the raw material gas is natural gas or methane-containing gas.
As the preferred scheme of the utility model, the oxygen is introduced into the pure oxygen converter.
As the utility model discloses an optimal scheme, the exhanst gas outlet of heating furnace has SCR deNOx systems through the pipe connection. The external smoke of the heating furnace is provided with an ultra-low emission SCR denitration system, so that NO can be removed X The emission is reduced to an extremely low level of 20mg/Nm 3 。
The utility model has the advantages that:
1. the utility model discloses a with CO 2 Added into raw material gas for recycling, can reduce H in synthesis gas 2 The ratio/CO makes it suitable for the requirements of the downstream users.
2. The new process for preparing the synthesis gas of the utility model is to CO 2 The gas is recycled, and CO is reduced 2 And (4) discharging. The utility model discloses arrange NO of flue gas outward X The content is reduced, and the air pollution is reduced.
3. The utility model discloses a heating furnace, pure oxygen reborner and relevant waste heat recovery equipment have carried out abundant recycle to the process gas used heat, have reached energy saving and consumption reduction's purpose.
4. The synthesis gas system develops key equipment and has a set of complete control system, so that the load increase and reduction and the production control of the device can be automatically completed under the monitoring of operators. The labor intensity of operators is reduced, the stability and the reliability of the device operation are improved, and the long-period operation of the device is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-heating a furnace; 2-pure oxygen reformer; 3-flexible thin tube plate waste boiler; 4-auxiliary waste heat recovery; 5-a purification and separation system; 6-a carbon dioxide compression system; 7-SCR deNOx systems.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, the system for preparing synthesis gas with low hydrogen-carbon ratio of this embodiment includes a heating furnace 1, a raw material gas is introduced into an inlet of the heating furnace 1, an outlet of the heating furnace 1 is connected with a pure oxygen converter 2 through a pipeline, a converted gas outlet of the pure oxygen converter 2 is connected with a waste heat recovery system through a pipeline, an outlet of the waste heat recovery system is connected with a purification and separation system 5 through a pipeline, a carbon dioxide outlet of the purification and separation system 5 is connected with a carbon dioxide compression system 6 through a pipeline, and the other end of the carbon dioxide compression system 6 is connected to an inlet of the heating furnace 1 through a pipeline. The raw material gas is natural gas or methane-containing gas; oxygen is introduced into the pure oxygen converter 2.
The waste heat recovery system comprises a flexible thin tube plate waste boiler 3 and an auxiliary waste heat recovery device 4, a converted gas outlet of the pure oxygen converter 2 is connected with an inlet of the flexible thin tube plate waste boiler 3 through a pipeline, a synthetic gas outlet of the flexible thin tube plate waste boiler 3 is connected with an inlet of the auxiliary waste heat recovery device 4 through a pipeline, and an outlet of the auxiliary waste heat recovery device 4 is connected with an inlet of the purification and separation system 5 through a pipeline. One part of steam generated by the flexible thin tube plate waste boiler 3 is introduced into an inlet of the heating furnace 1, and the other part of steam is sent out of a boundary area.
Introducing CO 2 The gas is added into raw gas (natural gas, etc.), certain steam is added according to a certain water-carbon ratio, after the gas is preheated to a certain temperature in a heating furnace 1, the gas enters an autothermal pure oxygen converter 2 with catalytic reaction at high temperature, and the reactions such as conversion reaction, reforming reaction, etc. occur in the autothermal pure oxygen converter 2. By adjusting CO 2 The addition amount, the water-carbon ratio and the operation temperature of the pure oxygen converter 2 are controlled to ensure that H is 2 CO is 1-2.5 to meet the requirement.
The reformed gas at the outlet of the pure oxygen reforming furnace 2 sequentially enters a large flexible thin tube plate waste boiler 3 and other waste heat recovery systems, waste heat is recovered in the large flexible thin tube plate waste boiler 3 to generate steam, except for preparation and utilization of synthesis gas, redundant steam is sent out of a boundary area for comprehensive utilization, and after waste heat recovery, the steam enters a purification and separation system 5, and CO of the purification and separation system 5 is purified and separated 2 The mixture is pressurized by a carbon dioxide compression system 6 and then is added into the raw material gas for recycling, and the insufficient part of CO is 2 Can be acquired outside. And (4) separating condensate from the synthesis gas after waste heat recovery, and then sending the synthesis gas to a purification system to prepare qualified synthesis gas according to the requirements of downstream users.
The utility model discloses a with CO 2 Added into raw material gas for recycling, can reduce H in synthesis gas 2 The ratio/CO makes it suitable for the requirements of the downstream users.
The novel process for preparing the synthesis gas of the utility model is to CO 2 The gas is recycled, and CO is reduced 2 And (4) discharging. The utility model discloses arrange NO of flue gas outward X The content is reduced, and the air pollution is reduced.
To reduce NO X And (4) discharging, wherein a flue gas outlet of the heating furnace 1 is connected with an SCR denitration system 7 through a pipeline. The discharged flue gas of the heating furnace 1 is provided with an ultra-low emission SCR denitration system 7, so that NO can be removed X The emission is reduced to an extremely low level of 20mg/Nm 3 。
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 (6)
1. A low hydrogen-carbon ratio synthesis gas preparation system is characterized in that: the device comprises a heating furnace (1), wherein a feed gas is introduced into an inlet of the heating furnace (1), an outlet of the heating furnace (1) is connected with a pure oxygen converter (2) through a pipeline, a converted gas outlet of the pure oxygen converter (2) is connected with a waste heat recovery system through a pipeline, an outlet of the waste heat recovery system is connected with a purification and separation system (5) through a pipeline, a carbon dioxide outlet of the purification and separation system (5) is connected with a carbon dioxide compression system (6) through a pipeline, and the other end of the carbon dioxide compression system (6) is connected to an inlet of the heating furnace (1) through a pipeline.
2. A low hydrogen to carbon ratio syngas generation system as claimed in claim 1, wherein: the waste heat recovery system comprises a flexible thin tube plate waste boiler (3) and an auxiliary waste heat recovery device (4), wherein a converted gas outlet of the pure oxygen converter (2) is connected with an inlet of the flexible thin tube plate waste boiler (3) through a pipeline, a synthetic gas outlet of the flexible thin tube plate waste boiler (3) is connected with an inlet of the auxiliary waste heat recovery device (4) through a pipeline, and an outlet of the auxiliary waste heat recovery device (4) is connected with an inlet of the purification and separation system (5) through a pipeline.
3. A low hydrogen to carbon ratio syngas generation system as claimed in claim 2, wherein: one part of steam generated by the flexible thin tube plate waste boiler (3) is introduced into an inlet of the heating furnace (1), and the other part of steam is sent out of a boundary area.
4. A low hydrogen to carbon ratio syngas generation system as claimed in claim 1, wherein: the raw material gas is natural gas or methane-containing gas.
5. A low hydrogen to carbon ratio syngas generation system as claimed in claim 1, wherein: oxygen is introduced into the pure oxygen converter (2).
6. A low hydrogen-to-carbon ratio synthesis gas preparation system according to any one of claims 1 to 5, wherein: the flue gas outlet of the heating furnace (1) is connected with an SCR denitration system (7) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221345060.3U CN217437758U (en) | 2022-05-31 | 2022-05-31 | Low hydrogen-carbon ratio synthesis gas preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221345060.3U CN217437758U (en) | 2022-05-31 | 2022-05-31 | Low hydrogen-carbon ratio synthesis gas preparation system |
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| CN217437758U true CN217437758U (en) | 2022-09-16 |
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| CN202221345060.3U Active CN217437758U (en) | 2022-05-31 | 2022-05-31 | Low hydrogen-carbon ratio synthesis gas preparation system |
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2022
- 2022-05-31 CN CN202221345060.3U patent/CN217437758U/en active Active
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