CN217854625U - Energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration - Google Patents
Energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration Download PDFInfo
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- CN217854625U CN217854625U CN202221444459.7U CN202221444459U CN217854625U CN 217854625 U CN217854625 U CN 217854625U CN 202221444459 U CN202221444459 U CN 202221444459U CN 217854625 U CN217854625 U CN 217854625U
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Abstract
The utility model provides an adopt economizer of propane simplex condition refrigeration production high-purity alkane belongs to petrochemical technical field, including cryogen vapour and liquid separator, 4# separator, condensation separating mechanism, circulation ice maker, oil separator and evaporative condenser. The propane of the utility model is used as a refrigerant, is one of product types, does not introduce new dangerous chemicals, and reduces the safety risk of the device; the energy is fully utilized in a gradient way, the effective distribution of high and low grade cooling capacity is realized, and the energy is saved and the consumption is reduced; low-temperature rectification is adopted to replace high-temperature rectification, so that the operation pressure of the system is effectively reduced, and the product extraction rate is greatly improved; the requirement of multi-taste cold quantity can be met only by establishing a refrigeration working condition, the process is simple, the investment is low, and the operation is convenient; propane is used as an energy carrier, and the conversion of the heat energy at the top of the rectifying tower and the cold energy at the bottom of the rectifying tower is realized through the latent heat released by the phase change of the propane and the sensible heat released by the temperature change, so that the external work is reduced, and the great energy saving is realized.
Description
Technical Field
The utility model relates to a petrochemical technical field, concretely relates to adopt energy-saving device of propane simplex condition refrigeration production high-purity alkane.
Background
At present, a reboiler heat source of a petrochemical product rectifying tower is generally heated to 80 ℃ by steam, circulating water is adopted at the top of the tower to be cooled to about 45 ℃, and the tower pressure needs to be controlled to about 2.0MPa due to higher tower temperature. The relative separation degree of each component is greatly reduced under higher pressure, high-purity products are difficult to extract, the temperature of a tower kettle is high, steam heating is needed, fuel is additionally consumed to produce steam, and the production cost is increased. In addition, higher operating pressures also increase safety risks.
Therefore, it is desirable to provide a safe, low-energy, and stable-production energy-saving device for producing high-purity alkane by propane single-working-condition refrigeration, so as to solve the existing problems.
Disclosure of Invention
In view of this, the utility model provides an adopt propane simplex condition refrigeration production high-purity alkane's economizer, simple structure, flow reasonable in design, easy and simple to handle, energy saving and consumption reduction.
In order to achieve the technical effects, the utility model discloses an economizer of high-purity alkane of propane simplex condition refrigeration production adopts following technical scheme:
an energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration comprises:
the refrigerant storage tank is used for containing propane;
the refrigerant gas-liquid separator is connected with a liquid outlet of the refrigerant storage tank through a pipeline and is used for separating the refrigerant from the gas;
the No. 4 separator is connected with the liquid outlet of the refrigerant gas-liquid separator through a pipeline to be used as refrigerant replenishing liquid;
the condensation separation mechanism is connected with the top of the high-purity alkane production device and is used for condensing and separating the top steam of the high-purity alkane production device into reflux liquid;
the circulating ice machine is connected with the gas outlet of the 4# separator and is used for compressing the gaseous propane;
the oil separator is connected with an air outlet of the circulating ice machine to carry out deoiling treatment on the propane;
the evaporative condenser is connected with an air outlet of the circulating ice machine, propane refrigerant exchanges heat with water, propane is changed from a gas phase to a liquid phase to emit a large amount of heat, the heat is taken away by the water, and propane liquid is discharged from a liquid outlet of the evaporative condenser and enters the refrigerant storage tank.
Furthermore, the condensation separation mechanism comprises a 1# top condenser connected with a top gas outlet of the deethanizer through a pipeline, a 1# separator connected with an outlet of the 1# top condenser, a 2# top condenser connected with a top gas outlet of the propane tower and a top gas outlet of the depropanizer through pipelines, a 2# separator connected with an outlet of the 2# top condenser, a 3# top condenser connected with a top gas outlet of the isobutane tower through a pipeline, a 4# top condenser connected with a top gas outlet of the deisobutanizer and a top gas outlet of the n-butane tower, and a 3# separator connected with the 4# top condenser.
Further, the refrigerant storage tank is connected with the refrigerant gas-liquid separator through an adjusting valve v01, and the propane enters the refrigerant gas-liquid separator for gas-liquid separation after being subjected to pressure regulation by the adjusting valve v 01.
Further, an air outlet of the refrigerant gas-liquid separator is respectively connected with an air inlet of a deethanizer reboiler, an air inlet of an isobutane reboiler and an air supplementing port of a circulating ice machine through pipelines, a liquid outlet of the refrigerant gas-liquid separator is respectively connected with a refrigerant inlet of a 4# top condenser, a refrigerant inlet of a 3# top condenser, a refrigerant inlet of a 1# top condenser and a refrigerant inlet of a 4# separator through pipelines, and an inlet of the refrigerant gas-liquid separator is connected with a refrigerant outlet of the 4# top condenser through a pipeline.
Further, an outlet of the propane tower reboiler is connected with an inlet of the refrigerant gas-liquid separator through a regulating valve v06, an outlet of the depropanizing tower reboiler is connected with an inlet of the refrigerant gas-liquid separator through a regulating valve v07, an outlet of the deisobutanizer reboiler is connected with an inlet of the refrigerant gas-liquid separator through a regulating valve v08, and an outlet of the normal butane tower reboiler is connected with an inlet of the refrigerant gas-liquid separator through a regulating valve v 09.
Furthermore, an inlet of the 4# separator is connected with a liquid outlet of the refrigerant gas-liquid separator, an outlet of a reboiler of the deethanizer and an outlet of the reboiler of the isobutane tower through pipelines, a liquid outlet of the 4# separator is connected with a top condenser of the 2# separator through a pipeline, and a gas outlet of the 4# separator is connected with a gas inlet of the circulating ice maker through a pipeline.
Further, an air outlet of the ice circulation machine is respectively connected with an inlet of the oil separator and an inlet of the evaporative condenser through pipelines.
Further, an outlet of the oil separator is respectively connected with an inlet of a propane tower reboiler, an inlet of a depropanization tower reboiler, an inlet of a deisobutanization tower reboiler and an inlet of a normal butane tower reboiler through pipelines and used for providing heat.
Furthermore, an outlet of the evaporative condenser is connected with a refrigerant storage tank through a pipeline, and the evaporative condenser puts the condensed refrigerant into the refrigerant storage tank.
The above technical scheme of the utility model at least include following beneficial effect:
1. the utility model takes propane as the refrigerant, which is one of the product types, does not introduce new dangerous chemicals, and reduces the safety risk of the device;
2. the energy is fully utilized in a gradient way, the effective distribution of high and low grade cooling capacity is realized, and the energy is saved and the consumption is reduced;
3. low-temperature rectification is adopted to replace high-temperature rectification, so that the operation pressure of the system is effectively reduced, and the product extraction rate is greatly improved;
4. the utility model can meet the requirement of multi-taste cold capacity only by establishing a refrigeration working condition, and has simple flow, low investment and convenient operation;
5. the utility model discloses use propane as the energy carrier, through the latent heat of propane phase change release and the sensible heat of temperature change release, realize the conversion of rectifying column top of the tower heat energy and rectifying column tower end cold volume, reduce outside doing work, realize energy-conservation by a wide margin.
Drawings
Fig. 1 is a schematic flow chart in the embodiment of the present invention.
In the figure:
1. a mixed hydrocarbon storage tank; 2. a deethanizer; 3. 1# Top condenser; 4. a 1# separator; 5. a propane column; 6. 2# overhead condenser; 7. a 2# separator; 8. a depropanizer; 9. an isobutane tower; 10. a # 3 top condenser; 11. an isobutane removal tower; 12. a n-butane tower; 13. 4# Top condenser; 14. a 3# separator; 15. a refrigerant gas-liquid separator; 16. 4# separator; 17. an evaporative condenser; 18. a refrigerant storage tank; 19. a circulating ice machine; 20. an oil separator.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will be made with reference to fig. 1 of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the present invention, belong to the protection scope of the present invention.
As shown in fig. 1: an energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration comprises: a cryogen tank 18 for holding propane;
a refrigerant gas-liquid separator 15 connected to a liquid outlet of the refrigerant storage tank 18 through a pipe for separating the refrigerant gas from the refrigerant;
a 4# separator 16; is connected with the liquid outlet of the refrigerant gas-liquid separator 15 through a pipeline to be used as refrigerant supplementary liquid;
the condensation separation mechanism is connected with the top of the high-purity alkane production device and is used for condensing and separating the top steam of the high-purity alkane production device into reflux liquid; the condensation separation mechanism comprises a # 1 top condenser 3 connected with the top gas outlet of the deethanizer 2 through a pipeline, a # 1 separator 4 connected with the outlet of the # 1 top condenser 3, a # 2 top condenser 6 connected with the top gas outlet of the propane tower 5 and the top gas outlet of the depropanizer 8 through pipelines, a # 2 separator 7 connected with the outlet of the # 2 top condenser 6, a # 3 top condenser 10 connected with the top gas outlet of the isobutane tower 9 through a pipeline, a # 4 top condenser 13 connected with the top gas outlet of the deisobutanizer 11 and the top gas outlet of the n-butane tower 12, and a # 3 separator 14 connected with the # 4 top condenser 13.
A circulating ice machine 19 connected with the outlet of the 4# separator 16 for gaseous propane compression;
the oil separator 20 is connected with an air outlet of the ice circulating machine 19 to carry out deoiling treatment on the propane;
the evaporative condenser 17 is connected with an air outlet of the ice circulating machine 19, propane refrigerant exchanges heat with water, propane is changed from a gas phase to a liquid phase to release a large amount of heat, the heat is taken away by water, and propane liquid is discharged from a liquid outlet of the evaporative condenser 17 and enters the refrigerant storage tank 18.
The refrigerant storage tank 18 is connected with the refrigerant gas-liquid separator 15 through an adjusting valve v01, and the propane enters the refrigerant gas-liquid separator 15 for gas-liquid separation after being subjected to pressure adjustment through the adjusting valve v 01.
An air outlet of the refrigerant gas-liquid separator 15 is respectively connected with an air inlet of a deethanizer reboiler, an air inlet of an isobutane reboiler and an air supplementing port of a circulating ice maker 19 through pipelines, a liquid outlet of the refrigerant gas-liquid separator 15 is respectively connected with a refrigerant inlet of a 4# top condenser 13, a refrigerant inlet of a 3# top condenser 10, a refrigerant inlet of a 1# top condenser 3 and a refrigerant inlet of a 4# separator 16 through pipelines, and an inlet of the refrigerant gas-liquid separator 15 is connected with a refrigerant outlet of the 4# top condenser 13 through a pipeline. The outlet of the propane tower reboiler is connected with the inlet of the refrigerant gas-liquid separator 15 through a regulating valve v06, the outlet of the depropanizing tower reboiler is connected with the inlet of the refrigerant gas-liquid separator 15 through a regulating valve v07, the outlet of the deisobutanizer reboiler is connected with the inlet of the refrigerant gas-liquid separator 15 through a regulating valve v08, and the outlet of the normal butane tower reboiler is connected with the inlet of the refrigerant gas-liquid separator 15 through a regulating valve v 09.
An inlet of the 4# separator 16 is respectively connected with a liquid outlet of the refrigerant gas-liquid separator 15, an outlet of the deethanizer reboiler and an outlet of the isobutane reboiler through pipelines, a liquid outlet of the 4# separator 16 is connected with the 2# top condenser 6 through a pipeline, and a gas outlet of the 4# separator 16 is connected with a gas inlet of the ice circulating machine 19 through a pipeline.
The air outlet of the ice circulation machine 19 is respectively connected with the inlet of the oil separator 20 and the inlet of the evaporative condenser 17 through pipelines. The outlet of the oil separator 20 is connected with the inlet of the propane tower reboiler, the inlet of the depropanizer reboiler, the inlet of the deisobutanizer reboiler and the inlet of the normal butane tower reboiler through pipelines respectively, and is used for providing heat. The outlet of the evaporative condenser 17 is connected to a refrigerant storage tank 18 through a pipe, and the evaporative condenser 17 puts the condensed refrigerant into the refrigerant storage tank 18.
The specific work flow is as follows: propane is from a refrigerant storage tank 18, the temperature is 18-40 ℃, the pressure is 8-14bar, the propane is throttled and depressurized to 5-7bar through an adjusting valve v01, the temperature is 5-14 ℃, then the propane enters a refrigerant gas-liquid separator 15 for gas-liquid separation, the propane separated by the gas-liquid separator is divided into gas-phase propane and liquid-phase propane, the gas-phase propane is divided into three strands, the first strand of gas-phase propane is used as a heat source of a reboiler of a deethanizer, the gas-phase propane is cooled and liquefied, then the gas-phase propane is throttled to 2.5-3.5 bar through an adjusting valve v10 and enters a 4# separator 16, the second strand of gas-phase propane is used as a heat source of the reboiler of the isobutane tower, the gas-phase propane is cooled and liquefied, then the gas-phase propane is throttled to 2.5-3.5 bar through an adjusting valve v11 and converged into an inlet pipeline of the 4# separator 16, and the third strand of gas-phase propane enters a circulating ice maker 19 air supplementing port.
The liquid-phase propane separated from the refrigerant gas-liquid separator 15 is divided into four streams, the first stream of liquid-phase propane enters the No. 4 top condenser 13 to provide cold energy, and returns to the refrigerant gas-liquid separator 15 after being gasified; the second liquid phase propane is throttled and depressurized to 2.7 to 3.7bar through a v02 regulating valve, then enters a No. 3 top condenser 10 to provide cold energy, is gasified, is stably controlled to 2.5 to 3.5bar through a regulating valve v03, and enters a No. 4 separator 16; the third liquid phase propane is throttled and depressurized to 3.5 to 4.5bar through a v04 regulating valve, then enters a No. 1 top condenser 3 to provide cold energy, is gasified, is stably controlled to 2.5 to 3.5bar through a regulating valve v05, and enters a No. 4 separator 16; throttling and depressurizing a fourth liquid phase propane to 2.5-3.5 bar through a v05 regulating valve, and feeding the fourth liquid phase propane into an inlet of a 4# separator 16 to serve as a refrigerant make-up liquid;
liquid-phase propane separated from the 4# separator 16 enters a 2# top condenser 6 to provide cold energy, the liquid-phase propane is gasified and then enters the 4# separator 16, gas-phase propane obtained from the 4# separator 16 enters a circulating ice machine 19 and is compressed to 7-14bar in the circulating ice machine 19 and then is divided into two parts, the first part of gas-phase propane enters an evaporation condenser 17, propane refrigerant exchanges heat with water in the evaporation condenser 17, the propane is changed from gas phase to liquid phase to emit a large amount of heat, the heat is taken away by water, and propane liquid is discharged from a liquid outlet of the evaporation condenser 17 and enters a refrigerant storage tank 18.
The second strand of gas-phase propane enters the oil separator 20, is separated into four strands after deoiling, one strand of gas-phase propane is used as a heat source and enters a propane tower reboiler to provide heat, is cooled and liquefied, is throttled to 5 to 7.5bar by a regulating valve v06 and then is converged into an inlet of a refrigerant gas-liquid separator 15; one strand of the mixed refrigerant enters a reboiler of a depropanizer as a heat source to provide heat, is cooled and liquefied, is throttled to 5 to 7.5bar by an adjusting valve v07, and then enters an inlet of a refrigerant gas-liquid separator 15; one strand of the mixed refrigerant enters a reboiler of the deisobutanizer as a heat source to provide heat, is cooled and liquefied, is throttled to 5 to 7.5bar by an adjusting valve v08, and then is converged into an inlet of a refrigerant gas-liquid separator 15; one strand of the mixed refrigerant enters a reboiler of a normal butane tower as a heat source to provide heat, is cooled and liquefied, is throttled to 5 to 7.5bar by an adjusting valve v09, and then is converged into an inlet of a refrigerant gas-liquid separator 15.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should be regarded as the protection scope of the present invention.
Claims (9)
1. An energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration is characterized by comprising the following components:
the refrigerant storage tank is used for containing propane;
the refrigerant gas-liquid separator is connected with a liquid outlet of the refrigerant storage tank through a pipeline and is used for separating the refrigerant from the gas and the liquid;
4# separator; the refrigerant gas-liquid separator is connected with a liquid outlet of the refrigerant gas-liquid separator through a pipeline to be used as a refrigerant supplementary liquid;
the condensation separation mechanism is connected with the top of the high-purity alkane production device and is used for condensing and separating the top steam of the high-purity alkane production device into reflux liquid;
the circulating ice machine is connected with the gas outlet of the 4# separator and is used for compressing the gaseous propane;
the oil separator is connected with an air outlet of the circulating ice machine to carry out deoiling treatment on the propane;
the evaporative condenser is connected with an air outlet of the circulating ice machine, propane refrigerant exchanges heat with water, propane is changed from a gas phase to a liquid phase to emit a large amount of heat, the heat is taken away by the water, and propane liquid is discharged from a liquid outlet of the evaporative condenser and enters the refrigerant storage tank.
2. The energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration according to claim 1, wherein the condensation separation mechanism comprises a # 1 top condenser connected with a top gas outlet of the deethanizer through a pipeline, a # 1 separator connected with an outlet of the # 1 top condenser, a # 2 top condenser connected with a top gas outlet of the propane tower and a top gas outlet of the depropanizer through pipelines, a # 2 separator connected with an outlet of the # 2 top condenser, a # 3 top condenser connected with a top gas outlet of the isobutane tower through a pipeline, a # 4 top condenser connected with a top gas outlet of the deisobutanizer and a top gas outlet of the n-butane tower, and a # 3 separator connected with the # 4 top condenser.
3. The energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration as claimed in claim 1, wherein the refrigerant storage tank is connected with the refrigerant gas-liquid separator through a regulating valve v01, and propane enters the refrigerant gas-liquid separator for gas-liquid separation after being subjected to pressure regulation by the regulating valve v 01.
4. The energy-saving device for producing high-purity alkane by using propane single-working-condition refrigeration according to claim 2, wherein a gas outlet of the refrigerant gas-liquid separator is respectively connected with a gas inlet of a reboiler of a deethanizer, a gas inlet of a reboiler of an isobutane tower and a gas supplementing port of a circulating ice machine through pipelines, a liquid outlet of the refrigerant gas-liquid separator is respectively connected with a refrigerant inlet of a 4# top condenser, a refrigerant inlet of a 3# top condenser, a refrigerant inlet of a 1# top condenser and a refrigerant inlet of a 4# separator through pipelines, and an inlet of the refrigerant gas-liquid separator is connected with a refrigerant outlet of the 4# top condenser through a pipeline.
5. The energy-saving device for producing high-purity alkane by propane single-working-condition refrigeration according to claim 4, wherein the outlet of the reboiler of the propane tower is connected with the inlet of the refrigerant gas-liquid separator through a regulating valve v06, the outlet of the reboiler of the depropanizer is connected with the inlet of the refrigerant gas-liquid separator through a regulating valve v07, the outlet of the reboiler of the deisobutanizer is connected with the inlet of the refrigerant gas-liquid separator through a regulating valve v08, and the outlet of the reboiler of the n-butane tower is connected with the inlet of the refrigerant gas-liquid separator through a regulating valve v 09.
6. The energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration as claimed in claim 1, wherein an inlet of the 4# separator is respectively connected with a liquid outlet of a refrigerant gas-liquid separator, an outlet of a reboiler of a deethanizer and an outlet of the reboiler of an isobutane tower through pipelines, a liquid outlet of the 4# separator is connected with a top condenser of the 2# separator through a pipeline, and a gas outlet of the 4# separator is connected with a gas inlet of a circulating ice machine through a pipeline.
7. The energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration as claimed in claim 1, wherein the air outlet of the ice circulating machine is respectively connected with the inlet of the oil separator and the inlet of the evaporative condenser through pipelines.
8. The energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration according to claim 1, wherein the outlet of the oil separator is respectively connected with the inlet of a propane tower reboiler, the inlet of a depropanizer reboiler, the inlet of a deisobutanizer reboiler and the inlet of a normal butane tower reboiler through pipelines for supplying heat.
9. The energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration according to claim 1, wherein an outlet of the evaporative condenser is connected with a refrigerant storage tank through a pipeline, and the evaporative condenser puts condensed refrigerant into the refrigerant storage tank.
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| CN202221444459.7U CN217854625U (en) | 2022-06-10 | 2022-06-10 | Energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration |
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| CN202221444459.7U CN217854625U (en) | 2022-06-10 | 2022-06-10 | Energy-saving device for producing high-purity alkane by adopting propane single-working-condition refrigeration |
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