CN111249890B - System and method for treating gas containing organic molecules - Google Patents
System and method for treating gas containing organic molecules Download PDFInfo
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- CN111249890B CN111249890B CN202010118695.9A CN202010118695A CN111249890B CN 111249890 B CN111249890 B CN 111249890B CN 202010118695 A CN202010118695 A CN 202010118695A CN 111249890 B CN111249890 B CN 111249890B
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- B01D53/34—Chemical or biological purification of waste gases
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
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Abstract
The invention provides a system for treating gas containing organic molecules, which comprises a solid heat carrier feeding unit, a gas supply unit containing organic molecules, a gas-solid mixing device and a gas-solid separation device, wherein the gas-solid mixing device comprises a gas inlet pipe, a gas outlet pipe and a gas-solid separation device; the gas containing organic molecules and the solid heat carrier are subjected to mixing heat exchange in a gas-solid mixing device; in the process of mixed heat exchange, organic molecule-containing gas serving as a flowing medium drives a solid heat carrier to flow, and the organic molecule-containing gas is heated to the required temperature by adjusting the gas-solid ratio according to the temperatures of different solid heat carriers; coke generated by heating and condensing the gas containing organic molecules is enriched on the surface of the solid heat carrier, so that the heat exchange and heating of the gas containing organic molecules can be continuously carried out; moreover, the solid heat carrier with coke on the surface can be heated to a required temperature by a coke burning method; the invention can be coupled with a fluid coking system, thereby reducing the cost for heating the gas containing organic molecules.
Description
Technical Field
The invention belongs to the technical field of gas treatment, relates to a system and a method for treating gas, and particularly relates to a system and a method for treating gas containing organic molecules.
Background
In organic chemical reactions, a high-temperature carrier gas containing an organic molecule gas is often required for providing reaction energy or a motive force for fluidization, or for participating in the reaction by decomposing organic molecules in the organic molecule gas into suitable reaction monomers through pyrolysis. Gas-supported pyrolysis of coal as disclosed in, for example, CN 104017609 a; in the hydrogenation reaction, an organic molecular gas is used to supply radicals such as methyl, ethyl, active hydrogen, etc., which stabilize macromolecular radicals.
The main heating and/or reaction methods of the organic molecule-containing gas include heat transfer by flame heating, heat transfer by high-temperature heat storage, or self-heating by partial oxidation. However, organic molecules in the gas containing the organic molecules are easy to condense to generate coke under a high-temperature condition, and the coke cannot be heated to a very high temperature when a furnace tube is used for heating, otherwise, coke is produced on the surface of the furnace tube, so that the risk of influencing heat transfer and/or blocking the furnace tube exists, and the economical efficiency and the stability of heating are influenced.
If high-temperature heat accumulation type heat transfer is adopted, although the temperature of the gas containing organic molecules can be heated to be very high, the organic molecules are easy to condense and coke is generated at high temperature, so that the high-temperature heat accumulation type heat transfer cannot be continuously carried out, a plurality of heat accumulation type heating boilers are required to be adopted for heating through a method of continuously switching heating and coke burning, the cost for treating the organic molecule gas is increased, the production efficiency is reduced, and the production stability is influenced.
The method of partial oxidation self-heating can heat the gas containing organic molecules to a high temperature and can realize continuous production, but the self-heating of oxidation needs to supplement air or oxygen, and CO are inevitably generated in the self-heating process2、N2、SO2、NOXAnd H2The presence of ineffective or even harmful gases such as O and the like can cause lower reaction efficiency and increase the energy consumption of production; and the presence of harmful gases requires the addition of additional equipment for treating the toxic and harmful gases.
Therefore, the system capable of continuously and stably increasing the temperature of the gas containing the organic molecules is provided, and the system has important significance for improving the energy utilization rate, avoiding the defects of coking by direct heating, unstable defects of regenerative heating and large quantity of ineffective gas during oxidation self-heating.
Disclosure of Invention
The invention aims to provide a system and a method for treating gas containing organic molecules, wherein the system for treating the gas containing the organic molecules has high heat exchange efficiency, can stably run for a long time, and can effectively avoid the defects of coking in a direct heating mode, unstable heat accumulating type heating and generation of a large amount of ineffective gas by oxidation self-heating type heating. And the system for treating the gas containing the organic molecules can be coupled with a plurality of processes, so that the application prospect is very wide.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a system for treating organic molecule-containing gas, which comprises a solid heat carrier feeding unit, an organic molecule-containing gas supply unit, a gas-solid mixing device and a gas-solid separation device.
In the gas-solid mixing device, organic molecule-containing gas provided by the organic molecule-containing gas supply unit is used as a fluidizing medium and is mixed with a solid heat carrier provided by the solid heat carrier supply unit for heat exchange, and the mixed medium flows into the gas-solid separation device for gas-solid separation.
The "organic molecule-containing gas" includes, but is not limited to, any one or a combination of at least two of raw gas generated by coal pyrolysis, dry gas of an oil refinery, associated gas of an oil field, natural gas or gas generated by heating and gasifying liquid organic matters.
The system for treating the gas containing the organic molecules provided by the invention exchanges heat with the gas containing the organic molecules by using the solid heat carrier, so that the temperature of the gas containing the organic molecules is increased. In the process of mixed heat exchange, the gas containing organic molecules is taken as a fluidizing medium to fluidize and convey the high-temperature solid heat carrier, and the gas containing organic molecules can be heated to different temperatures and/or decomposed into different monomers due to different properties and temperatures of the solid heat carrier. After being separated from the high-temperature solid heat carrier, the heated organic molecule-containing gas can be applied to different reaction processes according to the type of the contained organic molecule gas.
In the system for treating the gas containing the organic molecules, the organic molecules are heated and/or decomposed by a gas-solid fluidization heat exchange method. The system for treating the gas containing the organic molecules has high heat exchange efficiency, and can effectively avoid the defects of coking, unstable heat accumulation type heating and the defect of generating a large amount of ineffective gas by oxidation self-heating type heating caused by direct heating.
Preferably, the solid heat carrier feeding unit comprises a solid heat carrier heating device for heating the solid heat carrier.
The solid heat carrier heating device can not only heat the solid heat carrier when the system operates, but also reheat the carbon-containing heat carrier formed after the heat exchange of the solid heat carrier.
Preferably, the solid heat carrier heating device is a fluidized bed, and the solid heat carrier and/or the carbon-containing heat carrier are heated under the action of self-entrained coke and/or an external heat source. The heated solid heat carrier and/or carbon-containing heat carrier is used for exchanging heat with organic molecule-containing gas, and the flue gas generated by combustion can be subjected to waste heat recovery in a waste heat recovery device commonly used in the field.
Preferably, the gas-solid mixing device is a fluidized bed.
The gas containing organic molecules and the solid heat carrier are mixed and heat exchanged in the gas-solid mixing device. In the mixed heat exchange process, the organic molecule-containing gas as a flowing medium drives the solid heat carrier to flow, and the organic molecule-containing gas is heated to the required temperature by adjusting the gas-solid ratio according to the temperatures of different solid heat carriers.
Part of organic molecules can be condensed to generate coke in the temperature rising process, the gas containing the organic molecules is heated through the solid heat carrier, and the coke generated in the heating process can be enriched on the surface of the solid heat carrier, so that the defects that the coke is enriched on the surface of a furnace tube and blocks the furnace tube are overcome.
The method for burning the coke can burn the coke enriched on the surface of the solid heat carrier, so that the solid heat carrier can be reused for mixed heat exchange with the gas containing organic molecules; meanwhile, the solid heat carrier can be heated by the coke burning, and an external heat source required by the solid heat carrier is reduced.
Preferably, the gas-solid separation device comprises any one of an inertial separator, a cyclone separator or a sieve plate or a combination of at least two of the above.
The invention separates the gas-solid mixture after heat exchange into the carbon-containing heat carrier and the temperature-rising organic gas by arranging the gas-solid separation device. Wherein the warmed organic gas can be used in the required process steps; the carbon-containing heat carrier is heated in the solid heat carrier heating device by an external heat source and/or self combustion and then is reused for mixed heat exchange with the organic molecule-containing gas.
Preferably, the solid separated by the gas-solid separation device returns to the solid heat carrier heating device for heating.
Preferably, the solid heat carrier heating device comprises, but is not limited to, a fluidized bed.
The carbon-containing heat carrier separated by the gas-solid separation device returns to the fluidized bed to form a fluidized suspension layer under the action of high-speed airflow at the bottom, so that fluidized combustion is carried out. When the heat generated by the combustion of the coke carried by the carbonaceous heat carrier is insufficient, the carbonaceous heat carrier can be heated to the required temperature by supplementing an external heat source.
The external heat source can be directly supplemented into the solid heat carrier heating device through external fuel to be combusted, so that the solid heat carrier is heated to the required temperature; the solid heat carrier can also be heated to the required temperature by supplementing the solid heat carrier heating device with heat generated after external fuel is combusted in the external combustion device.
Preferably, the external fuel comprises fuel oil and/or fuel gas, further preferably heavy fuel oil.
Preferably, the system provided by the present invention is also capable of being coupled to a fluid coking process.
Preferably, the solid heat carrier comprises any one or a combination of at least two of porcelain balls, quartz sand, glass, vermiculite or molecular sieves. Typical but non-limiting combinations include ceramic spheres and quartz sand, quartz sand and glass, glass and vermiculite, vermiculite and molecular sieve, ceramic spheres, quartz sand and glass, ceramic spheres, glass and vermiculite, ceramic spheres, vermiculite and molecular sieve, ceramic spheres, quartz sand, vermiculite and molecular sieve, or ceramic spheres, quartz sand, glass, vermiculite and molecular sieve.
The combination includes mixing or compounding.
The mixing is a conventional mixing of at least two materials.
The compounding method includes, but is not limited to, ball milling at least two materials, and then kneading and then molding and sintering. The parameters of ball milling, kneading and sintering molding are not specifically limited, and the technical personnel in the field can reasonably select the parameters according to the specific composition of the solid heat carrier.
The solid heat carrier is a solid material with large heat capacity and good thermal stability, and the heat exchange between the organic molecule-containing gas and the solid heat carrier can be stably carried out by selecting the solid material.
In a second aspect, the present invention provides a method of applying the system for treating a gas containing organic molecules according to the first aspect, the method comprising the steps of:
mixing the organic molecule-containing gas with a solid heat carrier for heat exchange, and carrying out gas-solid separation to obtain a heated organic gas and a carbon-containing heat carrier; and after the temperature of the carbon-containing heat carrier is raised again, the carbon-containing heat carrier is reused for mixed heat exchange with the organic molecule-containing gas.
Preferably, the solid heat carrier comprises any one or a combination of at least two of porcelain balls, quartz sand, glass, vermiculite or molecular sieves. Typical but non-limiting combinations include ceramic spheres and quartz sand, quartz sand and glass, glass and vermiculite, vermiculite and molecular sieve, ceramic spheres, quartz sand and glass, ceramic spheres, glass and vermiculite, ceramic spheres, vermiculite and molecular sieve, ceramic spheres, quartz sand, vermiculite and molecular sieve, or ceramic spheres, quartz sand, glass, vermiculite and molecular sieve.
The combination includes mixing or compounding.
The mixing is a conventional mixing of at least two materials.
The compounding method includes, but is not limited to, ball milling at least two materials, and then kneading and then molding and sintering. The parameters of ball milling, kneading and sintering molding are not specifically limited, and the technical personnel in the field can reasonably select the parameters according to the specific composition of the solid heat carrier.
Preferably, the organic molecule-containing gas includes, but is not limited to, any one of raw gas generated by coal pyrolysis, dry gas of a refinery, oil field associated gas, natural gas or gas generated by heating and gasifying liquid organic matters, or a combination of at least two of the raw gas, the dry gas, the oil field associated gas and the gas.
Preferably, the mixed heat exchange is carried out by taking the organic molecule-containing gas as a fluidizing medium and mixing and exchanging the organic molecule-containing gas with the solid heat carrier.
The system for treating the gas containing the organic molecules provided by the invention exchanges heat with the gas containing the organic molecules by using the solid heat carrier, so that the temperature of the gas containing the organic molecules is increased. In the process of mixed heat exchange, the gas containing organic molecules is taken as a fluidizing medium to fluidize and convey the high-temperature solid heat carrier, and the gas containing organic molecules can be heated to different temperatures and/or decomposed into different monomers due to different properties and temperatures of the solid heat carrier. After being separated from the high-temperature solid heat carrier, the heated organic molecule-containing gas can be applied to different reaction processes according to the type of the contained organic molecule gas.
In the system for treating the gas containing the organic molecules, the organic molecules are heated and/or decomposed by a gas-solid fluidization heat exchange method. The system for treating the gas containing the organic molecules has high heat exchange efficiency, and can effectively avoid the defects of coking, unstable heat accumulation type heating and the defect of generating a large amount of ineffective gas by oxidation self-heating type heating caused by direct heating.
Preferably, the particle size D90 of the solid heat carrier is 100-3000 μm, and may be, for example, 100 μm, 500 μm, 1000 μm, 1500 μm, 2000 μm, 2500 μm or 3000 μm, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.
Preferably, the temperature of the solid heat carrier is 600-.
Preferably, the temperature of the temperature raising gas is 500-900 ℃, for example, 500 ℃, 550 ℃, 600 ℃, 650 ℃, 700 ℃, 750 ℃, 800 ℃, 850 ℃ or 900 ℃, but not limited to the enumerated values, and other non-enumerated values in the numerical range are also applicable; the relative pressure of the temperature-elevating gas is 0 to 1MPa, and may be, for example, 0MPa, 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa, 0.8MPa, 0.9MPa or 1MPa, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
As a preferred technical scheme of the method, the method comprises the following steps:
mixing organic molecule-containing gas with a solid heat carrier with the particle size D90 of 100-3000 mu m and the temperature of 600-1000 ℃, and performing gas-solid separation to obtain a carbon-containing heat carrier and a temperature-rising organic gas with the temperature of 500-900 ℃ and the relative pressure of 0-1 MPa; the temperature of the carbon-containing heat carrier is raised to 600-1000 ℃ and the carbon-containing heat carrier is reused for mixing and heat exchange with the organic molecule-containing gas.
Compared with the prior art, the invention has the following beneficial effects:
(1) the gas containing organic molecules and the solid heat carrier are subjected to mixing heat exchange in a gas-solid mixing device; in the mixed heat exchange process, the organic molecule-containing gas serving as a flowing medium drives a solid heat carrier to flow, and the organic molecule-containing gas is heated to the required temperature by adjusting the gas-solid ratio according to the temperatures of different solid heat carriers; coke generated by heating and condensing the gas containing organic molecules is enriched on the surface of the solid heat carrier, so that the heat exchange and heating of the gas containing organic molecules can be continuously carried out; moreover, the solid heat carrier with coke on the surface can be heated to the required temperature by a coke burning method;
(2) the invention can be coupled with a fluid coking system, thereby reducing the cost for heating the gas containing organic molecules.
Drawings
FIG. 1 is a schematic diagram of the system for treating a gas containing organic molecules provided in example 1;
FIG. 2 is a schematic diagram of the system for treating a gas containing organic molecules provided in example 2;
fig. 3 is a schematic structural diagram of a system for treating a gas containing organic molecules provided in example 3.
Wherein: 1, a gas-solid mixing device; 2, a gas-solid separation device; and 3, a solid heat carrier heating device.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a system for treating gas containing organic molecules, and the structural schematic diagram of the system for treating gas containing organic molecules is shown in fig. 1, and the system comprises a solid heat carrier feeding unit, a gas supply unit for gas containing organic molecules, a gas-solid mixing device 1 and a gas-solid separation device 2.
In the gas-solid mixing device 1, the organic molecule-containing gas provided by the organic molecule-containing gas supply unit is used as a fluidizing medium and is mixed with the solid heat carrier provided by the solid heat carrier supply unit for heat exchange, and the mixed medium flows into the gas-solid separation device 2 for gas-solid separation.
The solid heat carrier feeding unit comprises a solid heat carrier heating device 3 used for heating a solid heat carrier, wherein the solid heat carrier heating device 3 is a fluidized bed, and the solid heat carrier subjected to heat exchange and separation with organic molecule-containing gas is fluidized and combusted in the fluidized bed.
The gas-solid mixing device 1 is a fluidized bed; the gas-solid separation device 2 is any one of a cyclone separator, an inertial separator or a sieve plate as long as gas-solid separation can be realized.
The system for treating the gas containing the organic molecules uses the solid heat carrier to exchange heat with the gas containing the organic molecules, so that the temperature of the gas containing the organic molecules is increased. In the process of mixed heat exchange, the gas containing organic molecules is taken as a fluidizing medium to fluidize and convey the high-temperature solid heat carrier, and the gas containing organic molecules can be heated to different temperatures and/or decomposed into different monomers due to different properties and temperatures of the solid heat carrier. After being separated from the high-temperature solid heat carrier, the heated organic molecule-containing gas can be applied to different reaction processes according to the type of the contained organic molecule gas.
In the system for treating the gas containing the organic molecules, the organic molecules are heated and/or decomposed by a gas-solid fluidization heat exchange method. The system for treating the gas containing the organic molecules has high heat exchange efficiency, and can effectively avoid the defects of coking, unstable heat accumulation type heating and the defect of generating a large amount of ineffective gas by oxidation self-heating type heating caused by direct heating.
In the mixed heat exchange process, the organic molecule-containing gas serving as a flowing medium drives a solid heat carrier to flow, and the organic molecule-containing gas is heated to the required temperature by adjusting the gas-solid ratio according to the temperatures of different solid heat carriers; coke generated by heating and condensing the gas containing organic molecules is enriched on the surface of the solid heat carrier, so that the heat exchange and heating of the gas containing organic molecules can be continuously carried out; moreover, the solid heat carrier containing coke on the surface can be heated to a desired temperature by a scorching method.
The carbon-containing heat carrier separated by the gas-solid separation device 2 returns to the fluidized bed to form a fluidized suspension layer under the action of high-speed airflow at the bottom, so that fluidized combustion is carried out. When the heat generated by the combustion of the coke carried by the carbonaceous heat carrier is insufficient, the carbonaceous heat carrier can be heated to the required temperature by supplementing heavy fuel oil.
Example 2
The embodiment provides a system for treating gas containing organic molecules, and the structural schematic diagram of the system for treating gas containing organic molecules is shown in fig. 2, and the system comprises a solid heat carrier feeding unit, a gas supply unit for gas containing organic molecules, a gas-solid mixing device 1 and a gas-solid separation device 2.
Compared with the example 1, the system for treating the gas containing the organic molecules provided by the example 2 circularly heats and recycles the gas containing the organic molecules, which is cooled after being applied, and the rest is the same as the example 1.
The system for treating the gas containing the organic molecules uses the solid heat carrier to exchange heat with the gas containing the organic molecules, so that the temperature of the gas containing the organic molecules is increased. In the process of mixed heat exchange, the gas containing organic molecules is taken as a fluidizing medium to fluidize and convey the high-temperature solid heat carrier, and the gas containing organic molecules can be heated to different temperatures and/or decomposed into different monomers due to different properties and temperatures of the solid heat carrier. After the organic molecule-containing gas is separated from the high-temperature solid heat carrier, the heated organic molecule-containing gas can be applied to different reaction processes according to the type of the organic molecule-containing gas; then the gas containing organic molecules is cooled and recycled after being circulated to the gas-solid mixing device 1.
In the system for treating the gas containing the organic molecules, the organic molecules are heated and/or decomposed by a gas-solid fluidization heat exchange method. The system for treating the gas containing the organic molecules has high heat exchange efficiency, and can effectively avoid the defects of coking, unstable heat accumulation type heating and the defect of generating a large amount of ineffective gas by oxidation self-heating type heating caused by direct heating.
In the mixed heat exchange process, the organic molecule-containing gas serving as a flowing medium drives a solid heat carrier to flow, and the organic molecule-containing gas is heated to the required temperature by adjusting the gas-solid ratio according to the temperatures of different solid heat carriers; coke generated by heating and condensing the gas containing organic molecules is enriched on the surface of the solid heat carrier, so that the heat exchange and heating of the gas containing organic molecules can be continuously carried out; moreover, the solid heat carrier containing coke on the surface can be heated to a desired temperature by a scorching method.
The carbon-containing heat carrier separated by the gas-solid separation device 2 returns to the fluidized bed to form a fluidized suspension layer under the action of high-speed airflow at the bottom, so that fluidized combustion is carried out. When the heat generated by the combustion of the coke carried by the carbon-containing heat carrier is insufficient, the carbon-containing heat carrier can be heated to the required temperature by supplementing high-temperature organic combustion gas.
Example 3
The embodiment provides a system for treating gas containing organic molecules, and the structural schematic diagram of the system for treating gas containing organic molecules is shown in fig. 3, and the system comprises a solid heat carrier feeding unit, a gas supply unit for gas containing organic molecules, a gas-solid mixing device 1 and a gas-solid separation device 2.
In contrast to example 2, example 3 provides a system for treating a gas containing organic molecules in which the solid heat carrier heating unit 3 is also connected to a conventional fluid coking unit.
The fluidized coking device heats the solid heat carrier by burning heavy inferior fuel oil, and the carbon-containing heat carrier obtained by temperature rise returns to the solid heat carrier heating device 3, so that the temperature of the solid heat carrier in the solid heat carrier heating device 3 reaches the required temperature.
When the system for treating the organic molecule-containing gas provided in examples 1 to 3 is used to heat and/or decompose the organic molecule-containing gas, the solid heat carrier comprises any one or a combination of at least two of porcelain balls with the particle size D90 of 100-.
According to the application process of the gas containing organic molecules and the composition of the organic molecules in the gas containing organic molecules, the gas-solid ratio in the gas-solid mixing device 1 is controlled to raise the temperature of the gas containing organic molecules to 500-900 ℃. Carrying out gas-solid separation on the mixture of the gas containing organic molecules and the solid heat carrier after mixing and heat exchange in a gas-solid separation device 2, applying the obtained heated organic gas to a required process, cooling, and returning to the gas-solid mixing device 1 for heat exchange and heating; the carbon-containing heat carrier obtained after gas-solid separation is heated in the solid heat carrier heating device 3, and when the heat generated by the combustion of coke is insufficient, the carbon-containing heat carrier can be heated to the required temperature by adding fuel and/or coupling with a fluidized coking system.
In conclusion, the gas containing organic molecules and the solid heat carrier are subjected to mixing heat exchange in the gas-solid mixing device; in the mixed heat exchange process, the organic molecule-containing gas serving as a flowing medium drives a solid heat carrier to flow, and the organic molecule-containing gas is heated to the required temperature by adjusting the gas-solid ratio according to the temperatures of different solid heat carriers; coke generated by heating and condensing the gas containing organic molecules is enriched on the surface of the solid heat carrier, so that the heat exchange and heating of the gas containing organic molecules can be continuously carried out; moreover, the solid heat carrier with coke on the surface can be heated to the required temperature by a coke burning method; the invention can be coupled with a fluid coking system, thereby reducing the cost for heating the gas containing organic molecules.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (5)
1. A method of treating a gas containing organic molecules, the method comprising the steps of:
mixing the organic molecule-containing gas with a solid heat carrier for heat exchange, and carrying out gas-solid separation to obtain a heated organic gas and a carbon-containing heat carrier; after the carbon-containing heat carrier is heated again, the carbon-containing heat carrier is reused for mixed heat exchange with the organic molecule-containing gas;
the mixed heat exchange is to use organic molecule-containing gas as a fluidizing medium to carry out mixed heat exchange on the organic molecule-containing gas and a solid heat carrier;
the organic molecule-containing gas comprises any one or combination of at least two of raw coke oven gas generated by coal pyrolysis, dry gas of an oil refinery, associated gas of an oil field, natural gas or gas obtained by heating and gasifying liquid organic matters;
the solid heat carrier comprises any one or the combination of at least two of ceramic balls, quartz sand, glass, vermiculite or molecular sieves;
the temperature of the solid heat carrier is 600-1000 ℃;
the temperature of the temperature-rising organic gas is 500-900 ℃, and the relative pressure of the temperature-rising gas is 0-1 MPa;
the method is carried out in a system for treating the gas containing organic molecules, wherein the system comprises a solid heat carrier feeding unit, a gas supply unit for the gas containing organic molecules, a gas-solid mixing device and a gas-solid separation device;
in the gas-solid mixing device, organic molecule-containing gas provided by an organic molecule-containing gas supply unit is used as a fluidizing medium and is mixed with a solid heat carrier provided by a solid heat carrier supply unit for heat exchange, and the mixed medium flows into a gas-solid separation device for gas-solid separation;
the solid heat carrier feeding unit comprises a solid heat carrier heating device for heating a solid heat carrier;
the gas-solid mixing device is a fluidized bed.
2. The method of claim 1, wherein the gas-solid separation device comprises any one of an inertial separator, a cyclone separator, or a sieve plate, or a combination of at least two thereof.
3. The method according to claim 1, wherein the solids separated by the gas-solid separation device are returned to a solid heat carrier heating device for heating.
4. The method as claimed in claim 1, wherein the particle size D90 of the solid heat carrier is 100-3000 μm.
5. Method according to claim 1, characterized in that it comprises the following steps:
mixing organic molecule-containing gas with a solid heat carrier with the particle size D90 of 100-3000 mu m and the temperature of 600-1000 ℃, and performing gas-solid separation to obtain a carbon-containing heat carrier and a temperature-rising organic gas with the temperature of 500-900 ℃ and the relative pressure of 0-1 MPa; the temperature of the carbon-containing heat carrier is raised to 600-1000 ℃ and the carbon-containing heat carrier is reused for mixing and heat exchange with the organic molecule-containing gas.
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| CN202010118695.9A CN111249890B (en) | 2020-02-26 | 2020-02-26 | System and method for treating gas containing organic molecules |
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| CN202010118695.9A CN111249890B (en) | 2020-02-26 | 2020-02-26 | System and method for treating gas containing organic molecules |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2252813Y (en) * | 1996-05-16 | 1997-04-23 | 中国科学院化工冶金研究所 | Carrier circulating biological pyrolysis gasifying unit |
| RU2334777C1 (en) * | 2007-06-29 | 2008-09-27 | Ооо "Тту" | Method and system for refined fuel thermal processing |
| CN102115675A (en) * | 2009-12-30 | 2011-07-06 | 中国科学院过程工程研究所 | Heavy oil lightening method and device |
| CN107760342A (en) * | 2016-08-16 | 2018-03-06 | 王庆元 | A kind of classification method for pyrolysis of the powder containing carbon hydrogen element |
| CN107760343A (en) * | 2016-08-21 | 2018-03-06 | 王庆元 | A kind of gas-solid separating method of the pyrolytic reaction product of the powder containing carbon hydrogen element |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19902109A1 (en) * | 1999-01-20 | 2000-07-27 | Basf Ag | Process for thermal N¶2¶O decomposition |
| CN101235321B (en) * | 2008-01-25 | 2010-09-15 | 东南大学 | Indirect gasification device and method for solid fuel |
| CN103666502B (en) * | 2012-09-04 | 2015-08-12 | 中国科学院工程热物理研究所 | Solid carbonic material pyrolysis heat exchanger and method for pyrolysis |
| EP3363877A1 (en) * | 2017-02-21 | 2018-08-22 | Valerii Lurii | Duplex process for rapid thermochemical conversion of carbonaceous raw materials |
| CN108148633A (en) * | 2018-01-05 | 2018-06-12 | 贾钢丁 | A kind of house refuse solid thermal carriers catalytic gasification processing method |
| CN108504387B (en) * | 2018-04-17 | 2019-11-19 | 中国石油大学(华东) | Heavy oil millisecond is classified gas phase catalysis and cracks producing light olefins technique |
-
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- 2020-02-26 CN CN202010118695.9A patent/CN111249890B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2252813Y (en) * | 1996-05-16 | 1997-04-23 | 中国科学院化工冶金研究所 | Carrier circulating biological pyrolysis gasifying unit |
| RU2334777C1 (en) * | 2007-06-29 | 2008-09-27 | Ооо "Тту" | Method and system for refined fuel thermal processing |
| CN102115675A (en) * | 2009-12-30 | 2011-07-06 | 中国科学院过程工程研究所 | Heavy oil lightening method and device |
| CN107760342A (en) * | 2016-08-16 | 2018-03-06 | 王庆元 | A kind of classification method for pyrolysis of the powder containing carbon hydrogen element |
| CN107760343A (en) * | 2016-08-21 | 2018-03-06 | 王庆元 | A kind of gas-solid separating method of the pyrolytic reaction product of the powder containing carbon hydrogen element |
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