WO2023065443A1 - Propylene-propane separation system - Google Patents

Propylene-propane separation system Download PDF

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Publication number
WO2023065443A1
WO2023065443A1 PCT/CN2021/131076 CN2021131076W WO2023065443A1 WO 2023065443 A1 WO2023065443 A1 WO 2023065443A1 CN 2021131076 W CN2021131076 W CN 2021131076W WO 2023065443 A1 WO2023065443 A1 WO 2023065443A1
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tower
buffer tank
propane
inlet
propylene
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PCT/CN2021/131076
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French (fr)
Chinese (zh)
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陈晓敏
袁伟
王瑞
刘波
李晓旺
胡先念
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惠州宇新化工有限责任公司
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Publication of WO2023065443A1 publication Critical patent/WO2023065443A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/42—Regulation; Control
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C11/00—Aliphatic unsaturated hydrocarbons
    • C07C11/02—Alkenes
    • C07C11/06—Propene
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/04—Purification; Separation; Use of additives by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C9/00—Aliphatic saturated hydrocarbons
    • C07C9/02—Aliphatic saturated hydrocarbons with one to four carbon atoms
    • C07C9/08—Propane

Definitions

  • the utility model relates to the field of compound separation devices, in particular to a separation system for propylene and propane.
  • Propylene is a widely used intermediate in the chemical production process. It is one of the basic raw materials for the three major synthetic materials (plastics, synthetic rubber, and synthetic fibers). It is mainly used for the production of polypropylene, acrylonitrile, isopropanol, acetone and cyclic Propylene oxide, etc. Propylene is mainly derived from the by-products of petroleum cracking ethylene units, often mixed with hydrogen, ethylene, ethane and propane. In the process of refining propylene, it can be separated from lighter components such as hydrogen, ethane and ethylene through conventional distillation, while propylene and propane have a relative volatility close to 1, which is a difficult component to separate.
  • the purpose of the utility model is to provide a propylene and propane separation system with lower separation energy consumption.
  • a propylene and propane separation system including a propane-propylene rectification tower, a tower reactor material buffer tank, a tower reactor-tower material heat exchanger, a heat pump compressor, Compressor inlet buffer tank;
  • the bottom material line of the propane-propylene rectification tower is connected to the inlet of the buffer tank for the material in the bottom of the tower;
  • the gas phase line of the buffer tank for the material in the tower kettle is connected to the inlet of the compressor inlet buffer tank;
  • the liquid phase outlet line of the tower kettle material buffer tank is connected with the cold flow inlet of the tower kettle-top material heat exchanger
  • the cold flow outlet line of the tower kettle-top material heat exchanger is connected with the tower kettle material buffer tank;
  • the gas phase line at the top of the propane-propylene rectification tower is connected to the heat flow inlet of the tower kettle-top material heat exchanger;
  • the gas phase line at the outlet of the buffer tank at the inlet of the compressor is connected to the inlet of the heat pump compressor;
  • the gas line at the outlet of the heat pump compressor is connected to the bottom tank of the propylene-propane tower.
  • the heat outlet of the tower bottom-top material heat exchanger is connected with the inlet of the tower reflux tank.
  • the separation system of the utility model reduces the pressure of the buffer tank of the tower still material through the compressor, and the material of the tower still flows into the buffer tank of the tower still material, and the liquid propane in the buffer tank is reduced due to the pressure And vaporization, vaporized propane takes away heat and reduces the liquid phase temperature in the buffer tank.
  • the temperature of the liquid phase in the buffer tank is lower than the temperature of the gas phase material at the top of the tower, and the low-temperature liquid phase in the buffer tank exchanges heat with the gas phase material at the top of the tower, taking away the heat of the gas phase at the top of the tower, and at the same time vaporizes and returns to the buffer tank of the tower still material.
  • the gas phase vaporized in the buffer tank of the tower still material first enters the buffer tank at the inlet of the compressor, and then returns to the tower still after being pressurized by the compressor to heat the tower still material.
  • the gas phase material at the top of the tower is condensed and enters the top reflux tank, and then refluxes into the tower through the top of the tower.
  • Fig. 1 is a schematic diagram of the system structure of the utility model.
  • a propylene and propane separation system includes propane-propylene rectification tower A, tower bottom material buffer tank V1, tower bottom - tower top material heat exchanger E1, heat pump compressor C1, compressor inlet buffer tank V2 ;
  • the bottom material line 1 of the propane-propylene rectification tower A is connected to the inlet of the tower still material buffer tank V1;
  • the gas phase line 2 of the tower kettle material buffer tank V1 is connected with the inlet of the compressor inlet buffer tank V2;
  • the liquid phase outlet line 3 of the tower kettle material buffer tank V1 is connected with the tower kettle-top material heat exchanger E1 cold flow inlet;
  • the tower kettle-top material heat exchanger E1 cold flow outlet line 4 is connected to the tower kettle material buffer tank V1;
  • the gas phase line 5 at the top of the propane-propylene rectifying tower A is connected to the heat flow inlet of the tower kettle-top material heat exchanger E1;
  • the gas phase line 7 at the outlet of the compressor inlet buffer tank V2 is connected to the inlet of the heat pump compressor C1;
  • the gas phase line 8 at the outlet of the heat pump compressor C1 is connected to the propylene-propane tower kettle;
  • the heat outlet 6 of the tower kettle-top material heat exchanger E1 is connected to the inlet of the tower reflux tank.
  • the liquid phase material in the tower kettle flows into the tower kettle material buffer tank V1, and the heat pump compressor C1 reduces the pressure of the tower kettle material buffer tank, and the liquid propane in the buffer tank is vaporized due to the pressure drop.
  • the vaporized propane takes away the heat and lowers the liquid phase temperature in the buffer tank.
  • the temperature of the liquid phase in the buffer tank is lower than the temperature of the gas phase material at the top of the tower.
  • the low-temperature liquid phase in the buffer tank exchanges heat with the gas phase material at the top of the propane-propylene rectification tower through the heat exchanger E1, removes the heat of the gas phase at the top of the tower and vaporizes, and returns the vaporized propane gas phase to the buffer tank V1, and the gas phase at the top of the tower passes through After being cooled and liquefied, it enters the reflux tank of the propylene-propane rectification tower, and then flows back into the tower through the top of the tower.
  • the vaporized gas phase of V1 in the tower still material buffer tank first enters the heat pump compressor inlet buffer tank V2, and returns to the tower still after being pressurized by the heat pump compressor C1 to heat the tower still material.
  • the propylene and propane separation system described in the utility model is not only suitable for the propane-propylene separation system, but also suitable for systems with similar boiling points and high energy consumption for ordinary rectification separation; at the same time, the utility model
  • the system effectively recycles and utilizes the heat carried by the tower top material and reduces the steam consumption of the propane-propylene rectification tower by adding a buffer tank for the tower bottom material, a tower bottom-top material heat exchanger, a heat pump compressor, and a compressor inlet buffer tank.
  • the separation energy consumption of the propane-propylene rectification tower is greatly reduced. .

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A propylene-propane separation system, comprising a propane-propylene rectifying tower (A), a tower kettle material buffer tank (V1), a tower kettle-tower top material heat exchanger (E1), a heat pump compressor (C1), and a compressor inlet buffer tank (V2); a tower bottom material line (1) of the propane-propylene rectifying tower (A) is connected to an inlet of the tower kettle material buffer tank (V1); a gas phase line (2) of the tower kettle material buffer tank (V1) is connected to an inlet of the compressor inlet buffer tank (V2); a liquid phase outlet line (3) of the tower kettle material buffer tank (V1) is connected to a cold flow inlet of the tower kettle-tower top material heat exchanger (E1); a cold flow outlet line (4) of the tower kettle-tower top material heat exchanger (E1) is connected to the tower kettle material buffer tank (V1); a tower top gas phase line (5) of the propane-propylene rectifying tower (A) is connected to a heat flow inlet of the tower kettle-tower top material heat exchanger (E1); an outlet gas phase line (7) of the compressor inlet buffer tank (V2) is connected to an inlet of the heat pump compressor (C1); and an outlet gas phase line (8) of the heat pump compressor (C1) is connected into a kettle of a propylene-propane tower. The system can effectively recycle heat carried by tower top materials, thereby reducing the separation energy consumption of the propane-propylene rectifying tower (A).

Description

一种丙烯和丙烷分离系统A kind of propylene and propane separation system 技术领域technical field
本实用新型涉及化合物分离装置领域，尤其涉及一种丙烯和丙烷分离系统。The utility model relates to the field of compound separation devices, in particular to a separation system for propylene and propane.
背景技术Background technique
丙烯是化工生产过程中用途十分广泛的中间物，是三大合成材料(塑料，合成橡胶，合成纤维)的基本原料之一，主要用于生产聚丙烯、丙烯腈、异丙醇、丙酮和环氧丙烷等。丙烯主要来源于石油裂解乙烯装置的副产物，常常与氢气、乙烯、乙烷和丙烷等混合在一起。在丙烯精制过程中，其与较轻组分如氢气、乙烷和乙烯等通过常规精馏都能较好分离，而丙烯、丙烷的相对挥发度接近1,属于难分离组分。为了满足丙烯纯度≥99.6％(摩尔分数)的要求,丙烯塔都需要较多塔板,因此丙烯塔一般都采用串联塔,塔板数200层左右，采用常规的精馏方法需要较高的回流比，并消耗大量的能源。且目前有学者提出变压吸附法、变真空吸附法等在理论上能达到降低能耗效果，但材料开发、生产能力与操作时间在实际生产中都会有所限制。因此，常规精馏仍是工业上大量分离丙烷—丙烯的首选。Propylene is a widely used intermediate in the chemical production process. It is one of the basic raw materials for the three major synthetic materials (plastics, synthetic rubber, and synthetic fibers). It is mainly used for the production of polypropylene, acrylonitrile, isopropanol, acetone and cyclic Propylene oxide, etc. Propylene is mainly derived from the by-products of petroleum cracking ethylene units, often mixed with hydrogen, ethylene, ethane and propane. In the process of refining propylene, it can be separated from lighter components such as hydrogen, ethane and ethylene through conventional distillation, while propylene and propane have a relative volatility close to 1, which is a difficult component to separate. In order to meet the requirement of propylene purity ≥ 99.6% (mole fraction), the propylene tower needs more trays, so the propylene tower generally adopts a series tower with about 200 trays, and the conventional rectification method requires a higher reflux than, and consume a lot of energy. At present, some scholars have proposed that pressure swing adsorption and vacuum swing adsorption can reduce energy consumption in theory, but material development, production capacity and operating time will be limited in actual production. Therefore, conventional distillation is still the first choice for industrial separation of large quantities of propane-propylene.
实用新型内容Utility model content
本实用新型的目的在于提供一种分离能耗更低的丙烯和丙烷分离系统。The purpose of the utility model is to provide a propylene and propane separation system with lower separation energy consumption.
为实现上述目的，本实用新型采用如下的技术方案：一种丙烯和丙烷分离系统，包括丙烷－丙烯精馏塔、塔釜物料缓冲罐、塔釜-塔顶物料换热器、热泵压缩机、压缩机入口缓冲罐；In order to achieve the above purpose, the utility model adopts the following technical scheme: a propylene and propane separation system, including a propane-propylene rectification tower, a tower reactor material buffer tank, a tower reactor-tower material heat exchanger, a heat pump compressor, Compressor inlet buffer tank;
丙烷－丙烯精馏塔塔底物料线与塔釜物料缓冲罐入口连接；The bottom material line of the propane-propylene rectification tower is connected to the inlet of the buffer tank for the material in the bottom of the tower;
塔釜物料缓冲罐气相线与压缩机入口缓冲罐入口连接；The gas phase line of the buffer tank for the material in the tower kettle is connected to the inlet of the compressor inlet buffer tank;
塔釜物料缓冲罐液相出口线与塔釜-塔顶物料换热器冷流入口连接；The liquid phase outlet line of the tower kettle material buffer tank is connected with the cold flow inlet of the tower kettle-top material heat exchanger;
塔釜-塔顶物料换热器冷流出口线与塔釜物料缓冲罐连接；The cold flow outlet line of the tower kettle-top material heat exchanger is connected with the tower kettle material buffer tank;
丙烷－丙烯精馏塔塔顶气相线与塔釜-塔顶物料换热器热流入口连接；The gas phase line at the top of the propane-propylene rectification tower is connected to the heat flow inlet of the tower kettle-top material heat exchanger;
压缩机入口缓冲罐出口气相线与热泵压缩机入口连接；The gas phase line at the outlet of the buffer tank at the inlet of the compressor is connected to the inlet of the heat pump compressor;
热泵压缩机出口气相线连入丙烯-丙烷塔塔釜。The gas line at the outlet of the heat pump compressor is connected to the bottom tank of the propylene-propane tower.
进一步的，塔釜-塔顶物料换热器热流出口与塔回流罐入口连接。Further, the heat outlet of the tower bottom-top material heat exchanger is connected with the inlet of the tower reflux tank.
运用本实用新型的技术方案，具有以下有益效果：本实用新型的分离系统通过压缩机降低塔釜物料缓冲罐压力，塔釜物料自流入塔釜物料缓冲罐内，缓冲罐内液体丙烷因压力降低而汽化，汽化丙烷带走热量，降低缓冲罐内液相温度。此时缓冲罐内液相温度低于塔顶气相物料温度，缓冲罐内低温液相与塔顶气相物料换热，取走塔顶气相热量，同时汽化回到塔釜物料缓冲罐。塔釜物料缓冲罐汽化的气相先进入到压缩机入口缓冲罐，再经压缩机增压后回到塔釜，加热塔釜物料。塔顶气相物料冷凝后进入塔顶回流罐，再经塔顶回流至塔内。通过上述流程及设备，将丙烯-丙烷分离塔塔顶热量回收，用于加热塔釜物料；从而通过增加压缩机少量的电耗，极大节约丙烯-丙烷分离塔能耗，实现装置的节能。Using the technical scheme of the utility model has the following beneficial effects: the separation system of the utility model reduces the pressure of the buffer tank of the tower still material through the compressor, and the material of the tower still flows into the buffer tank of the tower still material, and the liquid propane in the buffer tank is reduced due to the pressure And vaporization, vaporized propane takes away heat and reduces the liquid phase temperature in the buffer tank. At this time, the temperature of the liquid phase in the buffer tank is lower than the temperature of the gas phase material at the top of the tower, and the low-temperature liquid phase in the buffer tank exchanges heat with the gas phase material at the top of the tower, taking away the heat of the gas phase at the top of the tower, and at the same time vaporizes and returns to the buffer tank of the tower still material. The gas phase vaporized in the buffer tank of the tower still material first enters the buffer tank at the inlet of the compressor, and then returns to the tower still after being pressurized by the compressor to heat the tower still material. The gas phase material at the top of the tower is condensed and enters the top reflux tank, and then refluxes into the tower through the top of the tower. Through the above process and equipment, the heat at the top of the propylene-propane separation tower is recovered and used to heat the materials in the tower kettle; thus, by increasing a small amount of power consumption of the compressor, the energy consumption of the propylene-propane separation tower is greatly saved, and the energy saving of the device is realized.
附图说明Description of drawings
图1为本实用新型系统结构示意图。Fig. 1 is a schematic diagram of the system structure of the utility model.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，但不构成对本实用新型保护范围的限制。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation to the protection scope of the present invention.
参见图1，一种丙烯和丙烷分离系统，包括丙烷－丙烯精馏塔A、塔釜物料缓冲罐V1、塔釜-塔顶物料换热器E1、热泵压缩机C1、压缩机入口缓冲罐V2；Referring to Fig. 1, a propylene and propane separation system includes propane-propylene rectification tower A, tower bottom material buffer tank V1, tower bottom - tower top material heat exchanger E1, heat pump compressor C1, compressor inlet buffer tank V2 ;
丙烷－丙烯精馏塔A塔底物料线1与塔釜物料缓冲罐V1入口连接；The bottom material line 1 of the propane-propylene rectification tower A is connected to the inlet of the tower still material buffer tank V1;
塔釜物料缓冲罐V1气相线2与压缩机入口缓冲罐V2入口连接；The gas phase line 2 of the tower kettle material buffer tank V1 is connected with the inlet of the compressor inlet buffer tank V2;
塔釜物料缓冲罐V1液相出口线3与塔釜-塔顶物料换热器E1冷流入口连接；The liquid phase outlet line 3 of the tower kettle material buffer tank V1 is connected with the tower kettle-top material heat exchanger E1 cold flow inlet;
塔釜-塔顶物料换热器E1冷流出口线4与塔釜物料缓冲罐V1连接；The tower kettle-top material heat exchanger E1 cold flow outlet line 4 is connected to the tower kettle material buffer tank V1;
丙烷－丙烯精馏塔A塔顶气相线5与塔釜-塔顶物料换热器E1热流入口连接；The gas phase line 5 at the top of the propane-propylene rectifying tower A is connected to the heat flow inlet of the tower kettle-top material heat exchanger E1;
压缩机入口缓冲罐V2出口气相线7与热泵压缩机C1入口连接；The gas phase line 7 at the outlet of the compressor inlet buffer tank V2 is connected to the inlet of the heat pump compressor C1;
热泵压缩机C1出口气相线8连入丙烯-丙烷塔塔釜连接；The gas phase line 8 at the outlet of the heat pump compressor C1 is connected to the propylene-propane tower kettle;
塔釜-塔顶物料换热器E1热流出口6与塔回流罐入口连接。The heat outlet 6 of the tower kettle-top material heat exchanger E1 is connected to the inlet of the tower reflux tank.
具体的，塔釜液相物料自流进塔釜物料缓冲罐V1，热泵压缩机C1降低塔釜物料缓冲罐压力，缓冲罐内液体丙烷因压力降低而汽化。汽化丙烷带走热量，降低缓冲罐内液相温度。此时缓冲罐内液相温度低于塔顶气相物料温度。缓冲罐内低温液相通过换热器E1与丙烷－丙烯精馏塔塔顶气相物料换热，取走塔顶气相热量并汽化，汽化的丙烷气相返回塔釜物料缓冲罐V1，塔顶气相经冷却液化后进入到丙烯-丙烷精馏塔回流罐，再经塔顶回流至塔内。Specifically, the liquid phase material in the tower kettle flows into the tower kettle material buffer tank V1, and the heat pump compressor C1 reduces the pressure of the tower kettle material buffer tank, and the liquid propane in the buffer tank is vaporized due to the pressure drop. The vaporized propane takes away the heat and lowers the liquid phase temperature in the buffer tank. At this time, the temperature of the liquid phase in the buffer tank is lower than the temperature of the gas phase material at the top of the tower. The low-temperature liquid phase in the buffer tank exchanges heat with the gas phase material at the top of the propane-propylene rectification tower through the heat exchanger E1, removes the heat of the gas phase at the top of the tower and vaporizes, and returns the vaporized propane gas phase to the buffer tank V1, and the gas phase at the top of the tower passes through After being cooled and liquefied, it enters the reflux tank of the propylene-propane rectification tower, and then flows back into the tower through the top of the tower.
塔釜物料缓冲罐内V1汽化的气相先进入到热泵压缩机入口缓冲罐V2，经热泵压缩机C1增压后回到塔釜，加热塔釜物料。The vaporized gas phase of V1 in the tower still material buffer tank first enters the heat pump compressor inlet buffer tank V2, and returns to the tower still after being pressurized by the heat pump compressor C1 to heat the tower still material.
综上所述，本实用新型所述的丙烯和丙烷分离系统，不仅适用于丙烷-丙烯分离系统，也同样适用于沸点相近，普通精馏分离能耗较大的系统；同时，本实用新型的系统通过新增塔釜物料缓冲罐、塔釜-塔顶物料换热器、热泵压缩机和压缩机入口缓冲罐，有效回收利用塔顶物料携带的热量，减少丙烷-丙烯精馏塔蒸汽用量，极大减少了丙烷-丙烯精馏塔分离能耗。。In summary, the propylene and propane separation system described in the utility model is not only suitable for the propane-propylene separation system, but also suitable for systems with similar boiling points and high energy consumption for ordinary rectification separation; at the same time, the utility model The system effectively recycles and utilizes the heat carried by the tower top material and reduces the steam consumption of the propane-propylene rectification tower by adding a buffer tank for the tower bottom material, a tower bottom-top material heat exchanger, a heat pump compressor, and a compressor inlet buffer tank. The separation energy consumption of the propane-propylene rectification tower is greatly reduced. .
以上所述是本实用新型的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本实用新型原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本实用新型的保护范围。 The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (2)

  1. 一种丙烯和丙烷分离系统，其特征在于：包括丙烷－丙烯精馏塔(A)、塔釜物料缓冲罐(V1)、塔釜-塔顶物料换热器(E1)、热泵压缩机(C1)、压缩机入口缓冲罐(V2)；A propylene and propane separation system, characterized in that it includes a propane-propylene rectification tower (A), a buffer tank for tower bottom material (V1), a tower bottom-tower material heat exchanger (E1), a heat pump compressor (C1 ), compressor inlet buffer tank (V2);
    丙烷－丙烯精馏塔(A)塔底物料线(1)与塔釜物料缓冲罐(V1)入口连接；The bottom material line (1) of the propane-propylene rectification tower (A) is connected to the inlet of the tower still material buffer tank (V1);
    塔釜物料缓冲罐(V1)气相线(2)与压缩机入口缓冲罐(V2)入口连接；The gas phase line (2) of the tower still material buffer tank (V1) is connected with the inlet of the compressor inlet buffer tank (V2);
    塔釜物料缓冲罐(V1)液相出口线(3)与塔釜-塔顶物料换热器(E1)冷流入口连接；The liquid phase outlet line (3) of the tower kettle material buffer tank (V1) is connected with the cold flow inlet of the tower kettle-overhead material heat exchanger (E1);
    塔釜-塔顶物料换热器(E1)冷流出口线(4)与塔釜物料缓冲罐(V1)连接；The tower kettle - the tower top material heat exchanger (E1) cold outflow outlet line (4) is connected with the tower kettle material buffer tank (V1);
    丙烷－丙烯精馏塔(A)塔顶气相线(5)与塔釜-塔顶物料换热器(E1)热流入口连接；The gas phase line (5) at the top of the propane-propylene rectification tower (A) is connected to the heat flow inlet of the tower still-top material heat exchanger (E1);
    压缩机入口缓冲罐(V2)出口气相线(7)与热泵压缩机(C1)入口连接；The gas line (7) at the outlet of the compressor inlet buffer tank (V2) is connected to the inlet of the heat pump compressor (C1);
    热泵压缩机(C1)出口气相线(8)连入丙烯-丙烷塔塔釜。The gas line (8) at the outlet of the heat pump compressor (C1) is connected to the propylene-propane tower still.
  2. 如权利要求1所述的一种丙烯和丙烷分离系统，其特征在于：塔釜-塔顶物料换热器(E1)热流出口(6)与塔回流罐入口连接。A kind of propylene and propane separation system as claimed in claim 1, it is characterized in that: the heat outflow outlet (6) of tower still-overhead material heat exchanger (E1) is connected with tower reflux tank inlet.
PCT/CN2021/131076 2021-10-20 2022-07-08 Propylene-propane separation system WO2023065443A1 (en)

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CN110105216A (en) * 2019-04-12 2019-08-09 天津乐科节能科技有限公司 A kind of method and device from backheat rectifying
CN210495280U (en) * 2019-06-26 2020-05-12 山东齐旺达石油化工有限公司 Heat pump rectification separation system of butane raw materials in ethylene preparation process
CN111302922A (en) * 2020-03-27 2020-06-19 北京诺维新材科技有限公司 Rectification separation method and rectification system
CN111467825A (en) * 2020-05-22 2020-07-31 浙江奇彩环境科技股份有限公司 Rectification tower tail gas self-recycling system with high-temperature booster compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080167512A1 (en) * 2007-01-08 2008-07-10 Sanders Edgar S Systems and Methods for the Separation of Propylene and Propane
CN204601653U (en) * 2015-01-20 2015-09-02 苏州天荣能源环境科技有限公司 A kind of enclosed heat pump rectification system being applicable to the large temperature difference
CN204589029U (en) * 2015-04-15 2015-08-26 山东齐鲁石化工程有限公司 Separation of olefins thermal-pump unit
CN109715258A (en) * 2016-09-07 2019-05-03 沙特基础全球技术有限公司 System and method for separating propylene and propane
CN110105216A (en) * 2019-04-12 2019-08-09 天津乐科节能科技有限公司 A kind of method and device from backheat rectifying
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CN111302922A (en) * 2020-03-27 2020-06-19 北京诺维新材科技有限公司 Rectification separation method and rectification system
CN111467825A (en) * 2020-05-22 2020-07-31 浙江奇彩环境科技股份有限公司 Rectification tower tail gas self-recycling system with high-temperature booster compressor

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