CN215674773U - Hydrocarbon unloading flash distillation gas recycle device - Google Patents
Hydrocarbon unloading flash distillation gas recycle device Download PDFInfo
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- CN215674773U CN215674773U CN202121717066.4U CN202121717066U CN215674773U CN 215674773 U CN215674773 U CN 215674773U CN 202121717066 U CN202121717066 U CN 202121717066U CN 215674773 U CN215674773 U CN 215674773U
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Abstract
The utility model belongs to the technical field of Fischer-Tropsch synthesis of coal-to-liquids, and particularly relates to a hydrocarbon emptying flash evaporation gas recycling device. In order to solve the problems that in the prior art, the tail gas heat utilization recovery rate is low, the energy consumption is high, the safety and environment-friendly risks exist, and how to optimize a hydrocarbon vent tail gas recovery pipeline, the utility model provides a hydrocarbon vent flash evaporation gas recovery and utilization device. In addition, the pipeline in the whole device can realize multiple functions of direct combustion, storage combustion, mixed storage and mixed reburning of tail gas.
Description
Technical Field
The utility model belongs to the technical field of Fischer-Tropsch synthesis of coal-to-liquids, and particularly relates to a hydrocarbon emptying flash evaporation gas recycling device.
Background
The information in this background section is only for enhancement of understanding of the general background of the utility model and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Fischer-Tropsch synthesis (also known as Fischer-Tropsch synthesis) is a process in which synthesis gas (a mixture of carbon monoxide and hydrogen) is used as a raw material to synthesize liquid hydrocarbons or hydrocarbons (hydrocarbons) in the presence of a catalyst under appropriate conditions. This process is a key component of gas liquefaction technology, which typically produces synthetic lubricating oils and synthetic fuels from coal, natural gas, or biomass. Fischer-tropsch synthesis is of intermittent interest as a source of low sulfur diesel fuel to address supply or cost issues of petroleum-based hydrocarbons.
The gas phase components separated by the hydrocarbon emptying recovery separator have more light components (C2-C4) and combustible content, the flash evaporation amount is larger, and the emptying gas contains higher light components. The inventor finds that if the hydrocarbon emptying tail gas obtained after the gas-phase components are separated by the hydrocarbon emptying recovery separator is directly discharged to a torch system, the tail gas heat utilization recovery rate is low, the energy consumption is high, and certain safety and environmental protection risks exist. The inventors have also found that although some techniques suggest recycling the hydrocarbon tail gas, there is no accurate, real-time control of the gas flow, and there is a risk if the hydrocarbon tail gas is simply stored in admixture with the combustion gases or combusted.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems that in the prior art, the tail gas heat utilization recovery rate is low, the energy consumption is high, the safety and environment-friendly risks exist, and how to optimize a hydrocarbon vent tail gas recovery pipeline, the utility model provides a hydrocarbon vent flash evaporation gas recovery and utilization device. In addition, the pipeline in the whole device can realize multiple functions of direct combustion, storage combustion, mixed storage and mixed reburning of tail gas.
Specifically, the utility model is realized by the following technical scheme: hydrocarbon unloading flash distillation gas recycle device, retrieve the separator including hydrocarbon unloading, the separator is retrieved in hydrocarbon unloading is connected with torch minute liquid jar through first governing valve, separator is retrieved in hydrocarbon unloading, governing valve and torch minute liquid jar are located first pipeline, the fuel gas entry passes through the second governing valve and is connected with the fuel gas buffer tank, the fuel gas entry, the second governing valve is connected with the fuel gas buffer tank and is located the second pipeline, first pipeline and second pipeline pass through the third pipe connection, third pipeline one end is located first governing valve and gives vent to anger the end, the other end is located second governing valve inlet end, be equipped with the check valve on the third pipeline.
One or more of the technical schemes have the following beneficial effects:
1) the hydrocarbon emptying gas pipeline is connected with the fuel gas pipeline, so that the functions of directly burning the hydrocarbon emptying gas, mixing with the fuel gas and then storing or burning are realized.
2) One end of the third pipeline is located at the air outlet end of the first regulating valve, the other end of the third pipeline is located at the air inlet end of the second regulating valve, and the third pipeline is provided with a check valve, so that the transmission path of the hydrocarbon emptying gas is flexibly adjusted. Opening a first regulating valve and a second regulating valve, closing a check valve, ensuring that hydrocarbon emptying gas flows into a torch liquid separating tank, conveying fuel gas to a fuel gas buffer tank, and independently conveying the two gases; and opening the first regulating valve, the check valve and the second regulating valve to ensure that the hydrocarbon emptying gas flows into a fuel gas pipeline, is mixed with the fuel gas according to a certain proportion and then is conveyed to a fuel gas buffer tank.
3) In order to further increase the controllability of the transmission of two gases and avoid backflow, the front and the back of the regulating valve are provided with stop valves, the check valve is provided with the stop valves, one end of a third pipeline is connected between the first regulating valve and the rear stop valve of the first regulating valve, and the other end of the third pipeline is positioned between the second regulating valve and the front stop valve of the second regulating valve, so that the controllability of the movement of the gases is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.
FIG. 1 is a schematic diagram of a hydrocarbon vent flash gas recycling apparatus according to example 1 of the present invention;
FIG. 2 is a schematic diagram of a hydrocarbon vent flash gas recycling apparatus according to example 2 of the present invention;
FIG. 3 is a schematic diagram of a hydrocarbon vent flash gas recycle apparatus according to comparative example 1 of the present invention;
wherein: 1. the hydrocarbon emptying and recycling separator comprises a first adjusting valve front cut-off valve, a first adjusting valve, a second adjusting valve rear cut-off valve, a first adjusting valve auxiliary line valve, a torch liquid separating tank, a second adjusting valve front cut-off valve, a second adjusting valve rear cut-off valve, a first adjusting valve rear cut-off valve, a second adjusting valve rear cut-off valve, a fuel gas buffer tank, a first adjusting valve front cut-off valve, a second adjusting valve rear cut-off valve, a fuel gas inlet, a first adjusting valve rear cut-off valve, a second adjusting valve rear cut-off valve, a fuel gas inlet, a first adjusting valve rear cut-off valve, a second adjusting valve rear cut-off valve, a fuel gas inlet, a third pipeline, a fourth adjusting valve rear cut-off valve, a fourth adjusting valve, a fourth.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be understood that when the term "comprising" is used in the present invention, it indicates the presence of the features, steps, operations, devices, components and/or combinations thereof.
The gas phase components separated by the hydrocarbon emptying recovery separator have more light components (C2-C4) and combustible content and larger flash evaporation amount, wherein the emptying gas in the high-temperature condensate and the low-temperature condensate contains higher light components. The inventor researches and discovers that after gas-phase components are separated by the hydrocarbon emptying recovery separator in some schemes, hydrocarbon emptying tail gas is directly discharged to a torch system, the heat utilization recovery rate of the tail gas is low, the energy consumption is high, and the safety and environmental protection risks exist. The inventors have also found that although some techniques suggest recycling the hydrocarbon tail gas, there is no accurate, real-time control of the gas flow, and there is a risk if the hydrocarbon tail gas is simply stored in admixture with the combustion gases or combusted.
The utility model provides a hydrocarbon emptying flash evaporation gas recycling device, which is characterized in that a tail gas conveying pipeline is additionally arranged to store tail gas, the matching of the pipeline connecting position and a valve is ingeniously designed, the accurate and real-time control of gas flow is realized, and the potential safety hazard caused by the backflow of the tail gas in a plurality of pipelines or the problems of flow speed and mixing ratio is avoided. In addition, the pipeline in the whole device can realize multiple functions of direct combustion, storage combustion, mixed storage and mixed reburning of tail gas.
Due to the fact that flash evaporation gas and light components (C2-C4) and combustible matter in the discharged gas in the Fischer-Tropsch synthesis product are high in content and flash evaporation amount, after the flash evaporation gas and the discharged gas are separated by the hydrocarbon recovery separator, the discharged gas is discharged to a torch, a large amount of heat waste is caused, and the risk of environmental protection accidents is also caused.
In order to realize energy conservation and emission reduction and improve heat recycling, the utility model is realized by the following technical scheme: hydrocarbon unloading flash distillation gas recycle device, retrieve the separator including hydrocarbon unloading, the separator is retrieved in hydrocarbon unloading is connected with torch minute liquid jar through first governing valve, separator is retrieved in hydrocarbon unloading, governing valve and torch minute liquid jar are located first pipeline, the fuel gas entry passes through the second governing valve and is connected with the fuel gas buffer tank, the fuel gas entry, the second governing valve is connected with the fuel gas buffer tank and is located the second pipeline, first pipeline and second pipeline pass through the third pipe connection, third pipeline one end is located first governing valve and gives vent to anger the end, the other end is located second governing valve inlet end, be equipped with the check valve on the third pipeline.
Design third pipeline one end and be located first governing valve end of giving vent to anger, the other end is located second governing valve inlet end, can realize following function:
firstly, open first governing valve and second governing valve, when closing the check valve, the ft synthesis result or hydrocarbon unloading flash distillation gas can be followed first pipeline and transported to torch branch fluid reservoir, and the fuel gas is carried to the fuel gas buffer tank through the second pipeline.
And secondly, when the first regulating valve, the second regulating valve and the check valve are simultaneously opened, the Fischer-Tropsch synthesis product or hydrocarbon emptying flash steam can be conveyed to the second pipeline along the first pipeline and the third pipeline, and then mixed with fuel gas and enters the fuel gas buffer tank. In a section of length from the fuel gas inlet to the joint of the second pipeline and the third pipeline, the fuel gas has certain flow velocity and moves to the fuel gas buffer tank, so that the Fischer-Tropsch synthesis product or hydrocarbon emptying flash gas transmitted from the third pipeline cannot generate the counter-flow phenomenon.
In order to further increase the air flow tightness, in one or more embodiments of the utility model, the first regulating valve is provided with a first regulating valve front cut-off valve and a first regulating valve rear cut-off valve on two sides.
In one or more embodiments of the utility model, the first regulator valve front shutoff valve is located at the first regulator valve air inlet, and the first regulator valve rear shutoff valve is located at the first regulator valve air outlet.
The pressure of vent gas (Fischer-Tropsch synthesis product or hydrocarbon vent flash gas) is not less than 0.5 MPa.
In order to meet the requirements of various working conditions and further increase the gas transmission safety, and avoid the blockage of a front cut-off valve of a first regulating valve, the first regulating valve and a rear cut-off valve of the first regulating valve from influencing the transportation of Fischer-Tropsch synthesis products or hydrocarbon emptying flash gas, the gas transmission safety is used as an alternative transmission route.
In one or more embodiments of the utility model, the second regulating valve is provided with a second regulating valve front cut valve and a second regulating valve rear cut valve on two sides.
Above-mentioned two sets of trip valves can guarantee to change the trip valve or when overhauing, can not take place gas leakage.
In one or more embodiments of the utility model, the second regulator valve front shutoff valve is located at the second regulator valve air inlet and the second regulator valve rear shutoff valve is located at the second regulator valve air outlet.
In one or more embodiments of the utility model, the check valve is provided with a front check valve and a rear check valve on both sides thereof, and the front check valve and the rear check valve are located on the third pipeline.
In one or more embodiments of the utility model, the pre-check valve trip valve is located at the check valve inlet proximate the first line and the post-check valve trip valve is located at the check valve outlet proximate the second line.
In a circuit improvement experiment, the inventor finds that the matching of a pipeline and a valve position is crucial, and if the pipeline and the valve position are not proper, the purposes of independently conveying Fischer-Tropsch synthesis products or hydrocarbon vent flash gas, independently conveying fuel gas, and conveying Fischer-Tropsch synthesis products or hydrocarbon vent flash gas and fuel gas in a mixing manner cannot be simultaneously realized.
Thus, in one or more embodiments of the utility model, the third line is connected at one end between the first regulator valve and the rear cut-off valve of the first regulator valve and at the other end between the second regulator valve and the front cut-off valve of the second regulator valve. Design like this can guarantee that ft synthesis product or hydrocarbon unloading flash distillation gas flow into the third pipeline after first governing valve governing pressure, flow into the second pipeline through the check valve, mix with the fuel gas and carry to the fuel gas buffer tank after second governing valve governing pressure for the reaction burning provides heat energy.
If the number of the adjusting valves or the check valves is reduced, the function of adjusting the gas pressure is lacked, the proportion of the fuel gas and Fischer-Tropsch synthesis products or hydrocarbon vent flash gas is easy to be disordered, and if the gas pressure in the second pipeline is different from that in the third pipeline, counter flow is easy to generate and even danger is generated in the pressure balancing process.
In one or more embodiments of the utility model, the fuel gas buffer tank is connected to a combustion device.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the utility model and not limiting.
Example 1
As shown in fig. 1, for the hydrocarbon emptying flash evaporation gas recycling device provided by this embodiment, the hydrocarbon emptying recycling separator 1 is connected with the flare liquid separating tank 6 through a first regulating valve 3, the hydrocarbon emptying recycling separator 1, the regulating valve 3 and the flare liquid separating tank 6 are located on a first pipeline 15, the fuel gas inlet 14 is connected with the fuel gas buffer tank 10 through a second regulating valve 8, the fuel gas inlet 14, the second regulating valve 8 and the fuel gas buffer tank 10 are connected and located on a second pipeline 16, the first pipeline 15 and the second pipeline 16 are connected through a third pipeline 17, one end of the third pipeline 17 is located at the gas outlet end of the first regulating valve 3, the other end of the third pipeline is located at the gas inlet end of the second regulating valve 8, and the third pipeline 17 is provided with a check valve 12. The air inlet of the first regulating valve 3 is connected with the air outlet of the first regulating valve 3 through a fourth pipeline 18, and a first regulating valve secondary line valve 5 is arranged on the fourth pipeline 18. The connection of the third line 17 to the first line 15 is between the fourth line, the first line connection and the outlet of the first shut-off valve 3.
Example 2
As shown in fig. 2, for the hydrocarbon emptying flash gas recycling device provided in this embodiment, the hydrocarbon emptying recycling separator 1 is sequentially connected to the first adjusting valve front cut-off valve 2, the first adjusting valve 3, the first adjusting valve rear cut-off valve 4, and the torch liquid separation tank 6, and is located on the first pipeline 15, the fuel gas inlet 14 is sequentially connected to the second adjusting valve front cut-off valve 7, the second adjusting valve 8, the second adjusting valve rear cut-off valve 9, and the fuel gas buffer tank 10, and is located on the second pipeline 16, the first pipeline 15 and the second pipeline 16 are connected by the third pipeline 17, one end of the third pipeline 17 is connected between the first adjusting valve 3 and the first adjusting valve rear cut-off valve 4, and the other end is located between the second adjusting valve 8 and the second adjusting valve front cut-off valve 7, and the third pipeline 17 is provided with the check valve 12.
The check valve 12 is provided with a front check valve cut-off valve 11 and a rear check valve cut-off valve 13 on both sides, the front check valve cut-off valve 11 and the rear check valve cut-off valve 13 are located on a third line 17, the front check valve cut-off valve 11 is located at an air inlet of the check valve 12, and is close to a first line 15, and the rear check valve cut-off valve 13 is located at an air outlet of the check valve 12, and is close to a second line 16. The air inlet of the front first adjusting valve cut-off valve 2 is connected with the air outlet of the rear first adjusting valve cut-off valve 4 through a fourth pipeline 18, and a first adjusting valve secondary line valve 5 is arranged on the fourth pipeline 18.
Comparative example 1
As shown in fig. 3, for the hydrocarbon emptying flash gas recycling device provided by the present comparative example, a hydrocarbon emptying recycling separator 1 is sequentially connected with a first adjusting valve front cut-off valve 2, a first adjusting valve 3, a first adjusting valve rear cut-off valve 4 and a torch liquid separating tank 6, and is located on a first pipeline 15, a fuel gas inlet 14 is sequentially connected with a second adjusting valve front cut-off valve 7, a second adjusting valve 8, a second adjusting valve rear cut-off valve 9 and a fuel gas buffer tank 10, an air inlet of the first adjusting valve front cut-off valve 2 is connected with an air outlet of the first adjusting valve rear cut-off valve 4 through a fourth pipeline 18, and a first adjusting valve secondary line valve 5 is arranged on the fourth pipeline 18.
Unlike examples 1 and 2, comparative example 1 does not have a pipeline for transporting the hydrocarbon gas or the flash gas to the fuel gas buffer tank 10, and thus, in terms of practical use effects, not only storage of the hydrocarbon gas or the flash gas, which results in energy waste, cannot be achieved, but also multiple effects of separately burning the hydrocarbon gas or the flash gas, mixing with the fuel gas, storing and burning, as in examples 1 and 2, cannot be achieved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. The utility model provides a hydrocarbon unloading flash distillation gas recycle device, a serial communication port, retrieve the separator including hydrocarbon unloading, the separator is retrieved in hydrocarbon unloading is connected with torch minute liquid jar through first governing valve, and separator, governing valve are retrieved in hydrocarbon unloading and torch minute liquid jar are located first pipeline, and the fuel gas entry passes through the second governing valve to be connected with the fuel gas buffer tank, and the fuel gas entry, second governing valve are connected with the fuel gas buffer tank and are located the second pipeline, and first pipeline and second pipeline pass through the third pipe connection, and third pipeline one end is located the first governing valve and gives vent to anger the end, and the other end is located the second governing valve inlet end, is equipped with the check valve on the third pipeline.
2. The hydrocarbon emptying flash gas recycling device according to claim 1, wherein a first adjusting valve front cut valve and a first adjusting valve rear cut valve are arranged on two sides of the first adjusting valve.
3. The hydrocarbon blowdown flash gas recycle device according to claim 2, wherein the front cut-off valve of the first regulating valve is positioned at the gas inlet of the first regulating valve, and the rear cut-off valve of the first regulating valve is positioned at the gas outlet of the first regulating valve.
4. The hydrocarbon emptying flash gas recycling device according to claim 2, characterized in that the gas inlet of the front stop valve of the first regulating valve is connected with the gas outlet of the rear stop valve of the first regulating valve through a fourth pipeline, and a secondary line valve of the first regulating valve is arranged on the fourth pipeline.
5. The hydrocarbon emptying flash gas recycling device according to claim 2, wherein a second regulating valve front cut valve and a second regulating valve rear cut valve are arranged on two sides of the second regulating valve.
6. The hydrocarbon blowdown flash gas recycle device according to claim 2, wherein the front cut-off valve of the second regulating valve is positioned at the gas inlet of the second regulating valve, and the rear cut-off valve of the second regulating valve is positioned at the gas outlet of the second regulating valve.
7. The hydrocarbon blowdown flash gas recycle device according to claim 1, wherein the check valve is provided with a front check valve and a rear check valve on both sides, and the front check valve and the rear check valve are located on the third pipeline.
8. The hydrocarbon blowdown flash gas recycle device according to claim 2, wherein the check valve front dump valve is located at the check valve inlet near the first pipeline, and the check valve rear dump valve is located at the check valve outlet near the second pipeline.
9. The hydrocarbon blowdown flash gas recycle device according to claim 5, wherein one end of the third pipeline is connected between the first regulating valve and the rear cut-off valve of the first regulating valve, and the other end of the third pipeline is located between the second regulating valve and the front cut-off valve of the second regulating valve.
10. The hydrocarbon blowdown flash gas recycle device of claim 1, wherein the fuel gas buffer tank is connected to a combustion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121717066.4U CN215674773U (en) | 2021-07-27 | 2021-07-27 | Hydrocarbon unloading flash distillation gas recycle device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121717066.4U CN215674773U (en) | 2021-07-27 | 2021-07-27 | Hydrocarbon unloading flash distillation gas recycle device |
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| Publication Number | Publication Date |
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| CN215674773U true CN215674773U (en) | 2022-01-28 |
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| CN202121717066.4U Active CN215674773U (en) | 2021-07-27 | 2021-07-27 | Hydrocarbon unloading flash distillation gas recycle device |
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- 2021-07-27 CN CN202121717066.4U patent/CN215674773U/en active Active
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