CN209922437U - System for conveying solid raw material by supercritical carbon dioxide - Google Patents
System for conveying solid raw material by supercritical carbon dioxide Download PDFInfo
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- CN209922437U CN209922437U CN201920647607.7U CN201920647607U CN209922437U CN 209922437 U CN209922437 U CN 209922437U CN 201920647607 U CN201920647607 U CN 201920647607U CN 209922437 U CN209922437 U CN 209922437U
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Abstract
The utility model discloses a system for conveying solid raw materials by supercritical carbon dioxide, which relates to the technical field of energy chemical industry; the technical problem to be solved is as follows: the system for conveying the solid raw material by the supercritical carbon dioxide is provided, the problem of low pressure of a solid raw material conveying and gasifying device can be solved, the steam or power consumption of the system is reduced, and the material conveying stability is high; the technical scheme is as follows: the system for conveying the solid raw material by the supercritical carbon dioxide comprises a buffer device, a storage bin, a pressurizing device, a material sending device and a material sending conveying pipeline, wherein the buffer device is provided with the supercritical CO2Inlet and outlet connectedConnected with supercritical CO2A supply pipeline, wherein a discharge port at the lower end of the storage bin is communicated with a feed port at the upper end of a pressurizing device, a pressurizing gas inlet is arranged on the pressurizing device, and the pressurizing gas inlet is communicated with the supercritical CO2The supply pipeline is communicated, the discharge port of the pressurizing device is communicated with the feeding port of the material sending device, and the discharge port of the material sending device is communicated with the feeding port of the high-pressure gasification furnace through a material sending conveying pipeline.
Description
Technical Field
The utility model discloses system for supercritical carbon dioxide carries solid raw materials relates to energy chemical industry technical field, concretely relates to transport of solid powder.
Background
China is a country rich in coal, poor in oil and less in gas, and the coal is still available for a long timeIs the main fossil energy in China. At the present stage, the direct combustion and utilization of coal not only has low energy utilization rate but also has serious pollution to the environment, thereby promoting the development of coal clean utilization technology. The coal gasification technology is a key and leading technology for clean and efficient utilization of coal. The gasification technology can be mainly divided into three types at present, namely fixed bed, fluidized bed and air bed gasification technology. The entrained flow gasification technology is gradually the mainstream due to the advantages of large industrial scale, wide powder adaptability, high efficiency, environmental protection and the like. The foreign entrained flow gasification technology solid powder gasification field mainly comprises the pulverized coal pressure gasification technology of American AP, Siemens GSP gasification technology, Kelin CCG pulverized coal pressure gasification technology and the like; the domestic entrained flow gasification technology solid powder gasification field mainly comprises an aerospace HT-L furnace, a Shenning furnace, an oriental furnace, a two-section dry solid powder pressurized gasification furnace and the like. However, the gasification technology uses high-pressure CO at the present stage2Dense phase conveying solid powder, the highest operation pressure of the gasification furnace can only reach 4.5MPa, and the highest operation pressure of the gasification furnace can reach ultrahigh pressure CO2The stability of the conveyed solid powder material still belongs to the technical problem; the coal water slurry gasification technology has achieved 6.5MPa of gasification furnace operating pressure, and a downstream system synthesis gas compressor is directly removed, so that the production and operation cost of users is greatly reduced, and the solid powder gasification furnace is in urgent need to solve the technical problem of 6.5MPa of operating pressure. Thus, supercritical CO is utilized2The characteristics of low viscosity, high density and small on-way resistance can effectively solve the problem, and the method is a necessary direction for conveying solid powder by a novel gasification technology.
SUMMERY OF THE UTILITY MODEL
This overcomes the not enough of prior art existence, and the technical problem that solves is: the system for conveying the solid raw material by the supercritical carbon dioxide is provided, solves the problem that a downstream system needs a production process of high-pressure synthesis gas with the pressure of more than 4.5MPa, is used for improving the operation pressure of a gasification furnace, cancels a synthesis gas compressor or reduces the investment of the synthesis gas compressor, reduces the steam or power consumption of the system, and has high material conveying stability.
In order to solve the technical problem, the technical scheme is as follows: the system for conveying the solid raw material by the supercritical carbon dioxide comprises a buffer device, a storage bin, a pressurizing device,The device comprises a material sending device and a material sending conveying pipeline, wherein supercritical CO is arranged on the buffer device2An inlet and an outlet connected with supercritical CO2A supply pipeline, wherein a discharge port at the lower end of the storage bin is communicated with a feed port at the upper end of a pressurizing device, a pressurizing gas inlet is arranged on the pressurizing device, and the pressurizing gas inlet is communicated with the supercritical CO2The supply pipeline is communicated, the discharge port of the pressurizing device is communicated with the feeding port of the material sending device, and the discharge port of the material sending device is communicated with the feeding port of the high-pressure gasification furnace through a material sending conveying pipeline.
The feeding device is provided with a pressure stabilizing gas inlet and a supercritical CO2The supply pipes are communicated.
One end of the feeding conveying pipeline close to the discharge port of the feeding device and supercritical CO2The supply pipes are communicated.
Supercritical CO of the buffer device2Supercritical CO introduced from inlet2The temperature is higher than 31.04 ℃ and the pressure is higher than 7.38 MPa.
Compared with the prior art, the method has the following beneficial effects: the utility model utilizes supercritical CO2The density is close to liquid, the viscosity is close to gas, the solid powder conveying device has the characteristics of low viscosity, high density and small on-way resistance, the stability of solid powder conveying is ensured, the defect of large flow fluctuation of the traditional carbon dioxide pressurization dense phase conveying solid powder can be solved, the problem of low pressure of a solid raw material conveying gasification device is solved, the operating pressure of the gasification furnace is further increased to about 6.5Mpa, and a compressor configured in a downstream system is omitted.
Drawings
Fig. 1 is a schematic structural diagram of a system for conveying solid raw materials by supercritical carbon dioxide.
In the figure: 1 is a buffer device, 2 is a storage bin, 3 is a pressurizing device, 4 is a material sending device, 5 is a material sending conveying pipeline, 6 is a high-pressure gasification furnace, and 7 is supercritical CO2A supply conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present embodiments clearer, the following will clearly and completely describe the technical solutions with reference to the embodiments in the present disclosure, and obviously, the described embodiments are a part of the embodiments, but not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection.
Fig. 1 is a schematic structural diagram of the system for conveying solid raw materials by supercritical carbon dioxide, and as shown in fig. 1, the system for conveying solid raw materials by supercritical carbon dioxide comprises a buffer device 1, a storage bin 2, a pressurizing device 3, a material sending device 4 and a material sending conveying pipeline 5, wherein supercritical CO is arranged on the buffer device 12An inlet and an outlet connected with supercritical CO2A supply line 7, a buffer device 1 for buffering supercritical CO2Avoiding the pressure fluctuation of carbon dioxide in the process of pressurizing solid powder, wherein a discharge port at the lower end of a storage bin 2 for storing the solid powder at normal pressure or low pressure is communicated with a feed port at the upper end of a pressurizing device 3, a pressurizing gas inlet is arranged on the pressurizing device 3, and the pressurizing gas inlet is communicated with supercritical CO2The supply pipeline 7 is communicated, the pressurizing device 3 is used for pressurizing normal-pressure or low-pressure solid powder to more than 7.38MPa through supercritical carbon dioxide, the discharge port of the pressurizing device 3 is communicated with the feed port of the material sending device 4, the discharge port of the material sending device 4 is communicated with the feed port of the high-pressure gasification furnace 6 through the material sending conveying pipeline 5, the material sending device 4 is used for continuously and stably conveying the pressurized solid powder into the high-pressure gasification furnace 6 through the material sending conveying pipeline 5, and the pressurized solid powder and the gasification agent generate synthesis gas in the high-pressure gasification furnace 6 with the operating pressure higher than 6.0 MPa.
The material sending device 4 is provided with a pressure stabilizing gas inlet and the pressure stabilizing gas inlet and supercritical CO2The supply ducts 7 are in communication.
One end of the feeding conveying pipeline 5 close to the discharge port of the feeding device 4 and supercritical CO2The supply ducts 7 are in communication.
Supercritical CO of the buffer device 12Supercritical CO introduced from inlet2The temperature is higher than 31.04 ℃ and the pressure is higher than 7.38 MPa.
The conveying method of the system for conveying the solid raw material by the supercritical carbon dioxide comprises the following steps:
first step, supercritical CO2Firstly, the mixture enters a buffer device 1 for storage and realizes buffering to stabilize pressure;
secondly, the normal pressure or low pressure solid powder stored in the storage bin 2 continuously flows into the pressurizing device 3, and the supercritical CO in the buffer device 12The powder enters a pressurizing device 3 and the normal pressure or low pressure solid powder is pressurized to be more than 7.38 Mpa;
thirdly, the solid powder pressurized by the pressurizing device 3 enters the material sending device 4, and the operating pressure of the material sending device 4 is stabilized at CO2In a supercritical state, namely the temperature is higher than 31.04 ℃ and the pressure is higher than 7.38MPa, constant pressure solid powder is continuously provided for the high-pressure gasification furnace 6 through the material sending and conveying pipeline 5, and the constant pressure solid powder and the gasification agent generate synthesis gas in the high-pressure gasification furnace 6.
The buffer device 1 continuously provides supercritical CO for the material sending device 42As a stable delivery gas source.
The buffer device 1 continuously provides supercritical CO for the material conveying pipeline 52As a stable delivery gas source.
The normal pressure or low pressure solid powder in the storage bin 2 comprises dry coal powder which is mostly solid raw material, dry coal powder and other carbon-containing materials, preferably pulverized coal and other carbon-containing materials.
The gasifying agent in the high-pressure gasification furnace 6 is pure oxygen, oxygen-enriched oxygen or air, preferably pure oxygen.
The utility model discloses in gasifier operating pressure is higher than 5.0MPa, preferably is higher than 6.5 MPa.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution and not for limiting the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the present embodiments.
Claims (4)
1. The system for conveying the solid raw material by the supercritical carbon dioxide is characterized in that: comprises a buffer device (1), a storage bin (2), a pressurizing device (3), a material sending device (4) and a material sending conveying pipeline (5), wherein the buffer device (1) is provided with supercritical CO2An inlet and an outlet connected with supercritical CO2A supply pipeline (7), a discharge port at the lower end of the storage bin (2) is communicated with a feed port at the upper end of the pressurizing device (3), a pressurizing gas inlet is arranged on the pressurizing device (3), and the pressurizing gas inlet is communicated with the supercritical CO2The supply pipeline (7) is communicated, the discharge port of the pressurizing device (3) is communicated with the feeding port of the material sending device (4), and the discharge port of the material sending device (4) is communicated with the feeding port of the high-pressure gasification furnace (6) through a material sending conveying pipeline (5).
2. The system for supercritical carbon dioxide delivery of a solid feedstock of claim 1 wherein: the material sending device (4) is provided with a pressure stabilizing gas inlet and the pressure stabilizing gas inlet and supercritical CO2The supply pipes (7) are communicated.
3. The system for supercritical carbon dioxide delivery of a solid feedstock of claim 2 wherein: one end of the feeding conveying pipeline (5) close to the discharge hole of the feeding device (4) and the supercritical CO2The supply pipes (7) are communicated.
4. The system for supercritical carbon dioxide delivery of a solid feedstock as recited in any one of claims 1-3, wherein: supercritical CO of the buffer device (1)2Supercritical CO introduced from inlet2The temperature is higher than 31.04 ℃ and the pressure is higher than 7.38 MPa.
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| CN201920647607.7U CN209922437U (en) | 2019-05-08 | 2019-05-08 | System for conveying solid raw material by supercritical carbon dioxide |
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| CN201920647607.7U CN209922437U (en) | 2019-05-08 | 2019-05-08 | System for conveying solid raw material by supercritical carbon dioxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110040518A (en) * | 2019-05-08 | 2019-07-23 | 宁夏神耀科技有限责任公司 | The system and its delivery method of supercritical carbon dioxide conveying solid substance raw material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110040518A (en) * | 2019-05-08 | 2019-07-23 | 宁夏神耀科技有限责任公司 | The system and its delivery method of supercritical carbon dioxide conveying solid substance raw material |
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