Apparatus for producing ethylene and propylene, and method for producing ethylene and propylene

Abstract

The object of the present invention is to provide an apparatus for producing ethylene and propylene that can suppress the amount of energy required for heating, as well as a method for producing ethylene and propylene. [Solution] The apparatus for producing ethylene and propylene according to the present invention comprises: a vaporization section for vaporizing a liquid raw material containing water and ethanol; a first heat exchange section for heating the gaseous raw material vaporized in the vaporization section by heat exchange; a heating section for further heating the gaseous raw material heated in the first heat exchange section; and a reaction section for contacting the gaseous raw material heated in the heating section with a catalyst to obtain a reaction product containing ethylene and propylene, wherein the first heat exchange section is supplied with the reaction product as a heat source and performs heat exchange between the reaction product and the gaseous raw material.

Description

Technical Field

[0001] The present invention relates to an apparatus for producing ethylene and propylene, and a method for producing ethylene and propylene. Background Art

[0002] Olefins such as ethylene and propylene are one of the major products in the petrochemical industry. Resins produced from these olefins as raw materials are widely used, and there is a demand for technology that can produce the olefins by an efficient method.

[0003] In recent years, technology for producing olefins such as ethylene and propylene using alcohols such as ethanol as a raw material has been studied. For example, Patent Document 1 discloses a technology for obtaining ethylene and propylene by bringing ethanol into contact with a catalyst, followed by separating and purifying the obtained mixture of products. Prior Art Documents Patent Documents

[0004] Patent Document 1 Japanese Unexamined Patent Publication No. 2024-52594 Summary of the Invention Problem to be Solved by the Invention

[0005] In conventional apparatuses for producing ethylene and propylene, from the viewpoint of suppressing the decomposition of ethanol and the progress of other side reactions, the raw material containing ethanol is usually heated by raising its temperature stepwise before bringing it into contact with the catalyst. However, the above production apparatus has a problem that heating the raw material stepwise results in a large amount of energy required for the heating.

[0006] Accordingly, an object of the present invention is to provide an apparatus for producing ethylene and propylene that can suppress the amount of energy required for heating, and a method for producing ethylene and propylene. [Means for solving the problem]

[0007] The apparatus for producing ethylene and propylene according to the present invention is A vaporization unit that vaporizes a liquid raw material containing water and ethanol, A first heat exchange unit heats the gaseous raw material vaporized in the aforementioned vaporization unit by heat exchange, A heating section for further heating the gaseous raw material heated in the first heat exchange section, The system comprises a reaction section in which the gaseous raw material heated in the heating section is brought into contact with a catalyst to obtain a reaction product containing ethylene and propylene, The first heat exchange unit receives the reaction product as a heat source and performs heat exchange between the reaction product and the gaseous raw material.

[0008] The apparatus for producing ethylene and propylene according to the present invention is A second heat exchange section heats a liquid raw material containing water and ethanol by heat exchange, A vaporization section for vaporizing the liquid raw material heated in the second heat exchange section, A heating section for heating the gaseous raw material vaporized in the aforementioned vaporization section, The system comprises a reaction section in which the gaseous raw material heated in the heating section is brought into contact with a catalyst to obtain a reaction product containing ethylene and propylene, The second heat exchange unit receives the reaction product as a heat source and performs heat exchange between the reaction product and the liquid raw material.

[0009] The present invention provides a method for producing ethylene and propylene, Ethylene and propylene are produced using the aforementioned manufacturing apparatus. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide an apparatus for producing ethylene and propylene that can suppress the amount of energy required for heating, as well as a method for producing ethylene and propylene. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a schematic diagram showing an ethylene and propylene production apparatus 1 according to the first embodiment. [Figure 2] Figure 2 is a schematic diagram showing the ethylene and propylene production apparatus 1 according to the second embodiment. [Modes for carrying out the invention]

[0012] [Equipment for producing ethylene and propylene] Hereinafter, embodiments of the ethylene and propylene production apparatus 1 according to the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments.

[0013] <First Embodiment> Figure 1 is a schematic diagram showing an ethylene and propylene production apparatus 1 according to the first embodiment. As shown in Figure 1, the ethylene and propylene production apparatus 1 according to the first embodiment comprises a vaporization section 4, a first heat exchange section 2, a heating section 5, a reaction section 6, and a second heat exchange section 3.

[0014] (Vaporization section) The vaporization unit 4 vaporizes the liquid raw material L, which contains water and ethanol. As shown in Figure 1, the gaseous raw material G vaporized in the vaporization unit 4 according to the first embodiment is supplied to the first heat exchange unit 2, which will be described later.

[0015] The method for vaporizing the liquid raw material L is not particularly limited, but examples include heating the liquid raw material L to a temperature above its boiling point, or supplying an inert gas to the liquid raw material L. When heating the liquid raw material L in the vaporization unit 4, the heating does not include heat exchange using the reaction product P, described later, as a heat transfer medium.

[0016] The liquid raw material L comprises water and ethanol. The liquid raw material L may further contain acetone, further contain 2-propanol, or further contain acetone and 2-propanol.

[0017] The composition of said gaseous raw material G is the same as that of said liquid raw material L.

[0018] (First Heat Exchange Section) The first heat exchange section 2 heats the gaseous raw material G vaporized in said vaporization section 4 by heat exchange. As shown in FIG. 1, the gaseous raw material G heated in the first heat exchange section 2 according to the first embodiment is supplied to a heating section 5 described later.

[0019] In said first heat exchange section 2, a reaction product P described later is supplied as a heat source, and heat exchange is performed between said reaction product P and said gaseous raw material G. Said first heat exchange section 2 is configured such that said reaction product P flows through a space different from the space through which said gaseous raw material G flows in said first heat exchange section 2. The reaction product P supplied to the first heat exchange section 2 is supplied to a second heat exchange section 3 described later.

[0020] Since said first heat exchange section 2 performs heat exchange as described above, the apparatus 1 for producing ethylene and propylene according to the first embodiment can reduce the amount of thermal energy required for heating the externally supplied gaseous raw material G.

[0021] In said first heat exchange section 2, an external heat medium may further be used as part of the heat source in heat exchange. In such a case, said first heat exchange section 2 is configured such that said external heat medium flows through a space different from the space through which said gaseous raw material G flows and the space through which said reaction product P flows in said first heat exchange section 2.

[0022] Examples of said external heat medium include hot air, steam, mineral oil, synthetic oil, molten salt, and molten metal. Said external heat medium is preferably steam or synthetic oil.

[0023] By using an external heat transfer medium in the first heat exchange unit 2, the ethylene and propylene production apparatus 1 according to the first embodiment can heat the gaseous raw material G by heat exchange in the first heat exchange unit 2, even if heat exchange using the reaction product P as a heat source has not started when the production apparatus is started.

[0024] From the viewpoint of reducing the amount of thermal energy consumed by the ethylene and propylene production apparatus 1 according to the first embodiment, the first heat exchange unit 2 may stop using the external heat transfer medium after the heat exchange using the reaction product P as a heat source has started. That is, when the first heat exchange unit 2 uses an external heat transfer medium, the first heat exchange unit 2 may have a first switching mechanism that switches between starting and stopping the use of the external heat transfer medium in the first heat exchange unit 2.

[0025] The first heat exchange unit 2 includes a discharge unit (not shown) for discharging the gaseous raw material G. The temperature of the gaseous raw material G in the discharge unit of the first heat exchange unit 2 is preferably 170°C to 600°C, more preferably 200°C to 550°C, and even more preferably 250°C to 450°C.

[0026] The temperature of the gaseous raw material G at the discharge section of the first heat exchange section 2 is measured by a thermocouple or thermometer placed at the discharge section.

[0027] The first heat exchange unit 2 includes a supply unit (not shown) for supplying the reaction product P. The temperature of the reaction product P in the supply unit of the first heat exchange unit 2 is preferably 170°C to 600°C, more preferably 200°C to 550°C, and even more preferably 250°C to 450°C.

[0028] The temperature of the reaction product P in the supply section of the first heat exchange section 2 is measured by a thermocouple or thermometer placed in the supply section.

[0029] (heating part) The heating unit 5 further heats the gaseous raw material G that has been heated in the first heat exchange unit 2. As shown in Figure 1, the gaseous raw material G heated in the heating unit 5 according to the first embodiment is supplied to the reaction unit 6, which will be described later.

[0030] Methods for heating the gaseous raw material G in the heating unit 5 include heat exchange using an external heat transfer medium and heating with an electric heater. Preferably, the heating unit 5 is supplied with an external heat transfer medium as a heat source, and heat exchange takes place between the external heat transfer medium and the gaseous raw material G. In this case, the heating unit 5 is configured such that the external heat transfer medium flows in a space separate from the space through which the gaseous raw material G flows. Furthermore, the external heat transfer medium used in the heating unit 5 is the same as the external heat transfer medium described in the section on the first heat exchange unit 2. Note that the method for heating the gaseous raw material G in the heating unit 5 does not include heat exchange using the reaction product P as a heat transfer medium.

[0031] The heating unit 5 includes a discharge unit (not shown) for discharging the gaseous raw material G. The temperature of the gaseous raw material G in the discharge unit of the heating unit 5 is preferably 270°C to 700°C, more preferably 300°C to 650°C, and even more preferably 350°C to 550°C.

[0032] The temperature of the gaseous raw material G at the discharge section of the heating section 5 is measured by a thermocouple or thermometer placed at the discharge section.

[0033] (Reaction section) The reaction unit 6 brings the gaseous raw material G, heated in the heating unit 5, into contact with a catalyst to obtain a reaction product P containing ethylene and propylene. As shown in Figure 1, the reaction product P obtained in the reaction unit 6 according to the first embodiment is supplied to the first heat exchange unit 2.

[0034] The catalyst is not particularly limited as long as it is a catalyst for synthesizing ethylene and propylene from alcohols such as ethanol. Examples of the catalyst include zirconium oxide catalysts, indium oxide catalysts, cerium oxide catalysts, aluminum oxide catalysts, and zeolite catalysts. From the viewpoint of improving the yield of propylene, the catalyst is preferably a zirconium oxide catalyst.

[0035] The reaction product P comprises ethylene and propylene. The reaction product P may further contain acetone, 2-propanol, ethanol, or acetone, 2-propanol, and ethanol.

[0036] The carbon yield of ethylene in the reaction product P is preferably 10 Cmol% to 90 Cmol%, more preferably 20 Cmol% to 70 Cmol%, and even more preferably 30 Cmol% to 50 Cmol%.

[0037] The carbon yield of propylene in the reaction product P is preferably 5 Cmol% to 75 Cmol%, more preferably 20 Cmol% to 60 Cmol%, and even more preferably 30 Cmol% to 50 Cmol%.

[0038] The carbon yields of ethylene and propylene in the reaction product P are determined by formula (1) below, using the number of carbon moles obtained by gas chromatography measured under the following conditions.

[0039] After pretreatment of the reaction product P or liquid raw material L using an Agilent backflush column, measurements are performed under the following conditions. Quantitative analysis is performed by converting the area value to the number of carbon moles using the absolute calibration curve method. Measuring device: 990 Micro GC (manufactured by Agilent) Measurement column: PoraPLOT Q (Length: 10m) Measurement detector: TCD Measurement temperature condition: 100℃ Carrier gas: Helium Carrier gas control method: Pressure control (190 kPa)

[0040] Carbon yield of ethylene or propylene (Cmol%) = (Number of moles of carbon in ethylene or propylene in reaction product P) / (Number of moles of carbon in liquid raw material L) × 100 ... (1)

[0041] The reaction section 6 may include a reactor.

[0042] Examples of the reactor include adiabatic reactors such as fixed-bed adiabatic reactors, moving-bed adiabatic reactors, and fluidized-bed adiabatic reactors. The reactor is preferably an adiabatic reactor, and more preferably a fixed-bed adiabatic reactor.

[0043] Because the reactor is an adiabatic reactor, it is possible to suppress the decrease in the temperature of the gaseous raw material G and the reaction product P inside the reactor, thereby suppressing a decrease in the reaction conversion rate while also suppressing a decrease in the amount of thermal energy of the reaction product P.

[0044] From the viewpoint of improving the yield of propylene, the reaction section 6 preferably has two or more reactors.

[0045] If the reaction unit 6 has two or more reactors, each reactor may be connected in series, or each reactor may be connected in parallel.

[0046] If the reaction unit 6 has two or more reactors, the reaction unit 6 may have connecting parts that connect the reactors to each other.

[0047] The connecting portion may also have a third heat exchange portion that controls the temperature of the reactor by heat exchange.

[0048] The third heat exchange unit is supplied with any heat medium as a heat source and performs heat exchange between the mixture of the unreacted gaseous raw material G and the partially generated reaction product P and the heat medium. The third heat exchange unit is configured such that the heat medium flows in a space separate from the space through which the mixture of the gaseous raw material G and the reaction product P flows in the third heat exchange unit.

[0049] In the third heat exchange section, an external heat transfer medium may be used as the heat source for heat exchange. The external heat transfer medium is the same as that described in the section on the first heat exchange section 2.

[0050] In the ethylene and propylene production apparatus 1 according to the first embodiment, the connecting portion has the third heat exchange portion, which suppresses a decrease in the temperature of the gaseous raw material G and reaction product P in the reactor. Therefore, it is possible to suppress a decrease in the reaction conversion rate while suppressing a decrease in the amount of thermal energy of the reaction product P.

[0051] In one embodiment, the ethylene and propylene production apparatus 1 according to the first embodiment has a reaction section 6 having two or more reactors, each reactor being connected in series, the reaction section 6 having a connecting section that connects each reactor to the others, and the connecting section having a third heat exchange section that controls the temperature of the reactors by heat exchange.

[0052] (Second heat exchange section) The second heat exchange unit 3 heats the liquid raw material L by heat exchange before vaporizing the liquid raw material L in the vaporization unit 4. As shown in Figure 1, the liquid raw material L heated in the second heat exchange unit 3 according to the first embodiment is supplied to the vaporization unit 4.

[0053] The second heat exchange unit 3 is supplied with the reaction product P, which has been cooled by the heat exchange in the first heat exchange unit 2, as a heat source, and performs heat exchange between the reaction product P and the liquid raw material L.

[0054] In the ethylene and propylene production apparatus 1 according to the first embodiment, the amount of thermal energy required to heat the gaseous raw material G supplied from the outside can be reduced by having the second heat exchange unit 3 perform heat exchange as described above.

[0055] In the second heat exchange section 3, an external heat transfer medium may be used as part of the heat source in the heat exchange. In that case, the second heat exchange section 3 is configured such that the external heat transfer medium flows in a space separate from the space through which the reaction product P flows in the second heat exchange section 3.

[0056] The external heat transfer medium is the same as that described in the section on the first heat exchange unit 2.

[0057] In the ethylene and propylene production apparatus 1 according to the first embodiment, the second heat exchange unit 3 uses an external heat transfer medium, so that even if heat exchange using the reaction product P as a heat source has not started when the production apparatus is started up, the liquid raw material L can be heated by heat exchange in the second heat exchange unit 3.

[0058] From the viewpoint of reducing the amount of thermal energy consumed by the ethylene and propylene production apparatus 1 according to the first embodiment, the second heat exchange unit 3 may stop using the external heat transfer medium after the heat exchange using the reaction product P as a heat source has started. That is, when the second heat exchange unit 3 uses an external heat transfer medium, the second heat exchange unit 3 may have a second switching mechanism for switching the start and stop of the use of the external heat transfer medium in the second heat exchange unit 3.

[0059] The second heat exchange unit 3 includes a discharge unit (not shown) for discharging the liquid raw material L. The temperature of the liquid raw material L at the discharge unit of the second heat exchange unit 3 is preferably 50°C to 250°C, more preferably 80°C to 200°C, and even more preferably 100°C to 180°C.

[0060] The temperature of the liquid raw material L at the discharge section of the second heat exchange section 3 is measured by a thermocouple or thermometer placed at the discharge section.

[0061] The second heat exchange unit 3 includes a supply unit (not shown) for supplying the reaction product P. The temperature of the reaction product P in the supply unit of the second heat exchange unit 3 is preferably 100°C to 600°C, more preferably 100°C to 550°C, and even more preferably 150°C to 450°C.

[0062] The temperature of the reaction product P in the supply section of the second heat exchange section 3 is measured by a thermocouple or thermometer placed in the supply section.

[0063] The ethylene and propylene production apparatus 1 according to the first embodiment includes the first heat exchange unit 2, the heating unit 5, and the second heat exchange unit 3, which allows for the heating of the liquid raw material L or the gaseous raw material G in separate steps. This reduces the heat transfer area in each heating step, enabling efficient heating of the liquid raw material L or the gaseous raw material G.

[0064] (Preheating section) The ethylene and propylene production apparatus 1 according to the first embodiment may further include a preheating unit for preheating the liquid raw material L before supplying the liquid raw material L to the second heat exchange unit 3.

[0065] In the preheating section, the liquid raw material L may be supplied as a refrigerant in an external cooler, and the liquid raw material L may be preheated by recovering heat from the object to be cooled. An example of the external cooler is a cooler for a cooling liquid used in a quenching tower for purifying the reaction product P.

[0066] (Booster booster) The ethylene and propylene production apparatus according to the first embodiment may further include a pressurizing unit for pressurizing the liquid raw material L before supplying the liquid raw material L to the vaporization unit 4, and may further include a pressurizing unit for pressurizing the liquid raw material L before supplying the liquid raw material L to the second heat exchange unit 3.

[0067] The aforementioned boosting unit may include a booster. Examples of boosters include hydraulic boosters and water pressure boosters.

[0068] The pressure in the pressure boosting section is preferably 0.1 MPaG or more and 10 MPaG or less, and more preferably 0.5 MPaG or more and 5 MPaG or less.

[0069] The pressure in the pressure boosting unit is measured by a pressure gauge located inside the pressure boosting unit.

[0070] The ethylene and propylene production apparatus 1, by including the pressurizing unit, enables efficient heating of the liquid raw material L to a high temperature while maintaining a high overall heat transfer coefficient in its liquid state.

[0071] (Depressurization section) The ethylene and propylene production apparatus 1 according to the first embodiment may further include a depressurization unit that depressurizes the liquid raw material L before supplying the pressurized liquid raw material L, which has been pressurized in the pressurization unit, to the vaporization unit 4.

[0072] The depressurization unit has a depressurization mechanism for depressurizing the pressurized liquid raw material L. Examples of the depressurization mechanism include a pressure reducing valve and piping. The depressurization mechanism is preferably a pressure reducing valve or piping.

[0073] The pressure in the depressurization section is preferably 0.05 MPaG or more and 9.5 MPaG or less, and more preferably 0.1 MPaG or more and 4.9 MPaG or less.

[0074] The pressure in the depressurization section is measured by a pressure gauge placed inside the depressurization section, for example, on the downstream side of the pressure reducing valve in the direction of the liquid raw material L flow, or inside the piping.

[0075] The ethylene and propylene production apparatus 1 includes a pressurizing unit before supplying the liquid raw material L to the second heat exchange unit 3, and a depressurizing unit before supplying the pressurized liquid raw material L to the vaporization unit 4. This allows for efficient heating of the liquid raw material L, which has been pressurized in a liquid state and maintains a high overall heat transfer coefficient. Furthermore, because the liquid raw material L is depressurized before being supplied to the vaporization unit 4, it becomes easier to vaporize, thus reducing the energy required to vaporize the liquid raw material L.

[0076] As shown in Figure 1, the ethylene and propylene production apparatus 1 according to the first embodiment further comprises: a first pipe 7 that supplies the gaseous raw material G from the vaporization section 4 to the first heat exchange section 2; a second pipe 8 that supplies the gaseous raw material G from the first heat exchange section 2 to the heating section 5; a third pipe 9 that supplies the gaseous raw material G from the heating section 5 to the reaction section 6; a fourth pipe 10 that supplies the reaction product P from the reaction section 6 to the first heat exchange section 2; a fifth pipe 11 that supplies the reaction product P from the first heat exchange section 2 to the second heat exchange section 3; and a sixth pipe 12 that supplies the liquid raw material L from the second heat exchange section 3 to the vaporization section 4.

[0077] In the ethylene and propylene production apparatus 1 according to the first embodiment, preferably, at least one of the first pipe 7, the second pipe 8, the third pipe 9, and the fourth pipe 10 is insulated; more preferably, at least one of the first pipe 7, the second pipe 8, the third pipe 9, the fourth pipe 10, the fifth pipe 11, and the sixth pipe 12 is insulated; and even more preferably, all of the first pipe 7, the second pipe 8, the third pipe 9, the fourth pipe 10, the fifth pipe 11, and the sixth pipe 12 are insulated.

[0078] In the ethylene and propylene production apparatus 1, since each pipe is insulated as described above, the thermal energy held by the gaseous raw material G and the reaction product P is maintained within each pipe. As a result, the amount of thermal energy required to heat the gaseous raw material G is reduced, and the thermal energy of the reaction product P used for heat exchange is maintained, thereby suppressing a decrease in the efficiency of the heat exchange.

[0079] The ethylene and propylene production apparatus 1 according to the first embodiment further comprises, in one embodiment, a first pipe 7 that supplies the gaseous raw material G from the vaporization section 4 to the first heat exchange section 2, a second pipe 8 that supplies the gaseous raw material G from the first heat exchange section 2 to the heating section 5, a third pipe 9 that supplies the gaseous raw material G from the heating section 5 to the reaction section 6, a fourth pipe 10 that supplies the reaction product P from the reaction section 6 to the first heat exchange section 2, a fifth pipe 11 that supplies the reaction product P from the first heat exchange section 2 to the second heat exchange section 3, and a sixth pipe 12 that supplies the liquid raw material L from the second heat exchange section 3 to the vaporization section 4, wherein at least one of the first pipe 7, the second pipe 8, the third pipe 9, the fourth pipe 10, the fifth pipe 11, and the sixth pipe 12 is insulated.

[0080] The ethylene and propylene production apparatus 1 according to the first embodiment may further include a power generation unit at the outlet of the reaction unit 6 that generates electricity using the thermal energy of the reaction product P.

[0081] The ethylene and propylene production apparatus 1, by including a power generation unit, can reuse the thermal energy of the reaction product P, thereby contributing to a reduction in environmental impact.

[0082] The ethylene and propylene production apparatus 1 according to the first embodiment can suppress the amount of energy required for heating when implemented in the above manner.

[0083] <Second Embodiment> Figure 2 is a schematic diagram showing an ethylene and propylene production apparatus 1 according to the second embodiment. As shown in Figure 2, the ethylene and propylene production apparatus 1 according to the second embodiment comprises a second heat exchange section 3, a vaporization section 4, a heating section 5, and a reaction section 6.

[0084] (Second heat exchange section) The second heat exchange unit 3 heats the liquid raw material L, which contains water and ethanol, by heat exchange. As shown in Figure 2, the liquid raw material L heated in the second heat exchange unit 3 according to the second embodiment is supplied to the vaporization unit 4.

[0085] The second heat exchange unit 3 receives the reaction product P as a heat source and performs heat exchange between the reaction product P and the liquid raw material L.

[0086] In the second heat exchange section 3, an external heat transfer medium may be used as part of the heat source in the heat exchange. In that case, the second heat exchange section 3 is configured such that the external heat transfer medium flows in a space separate from the space through which the reaction product P flows in the second heat exchange section 3.

[0087] The external heat transfer medium is the same as that described in the section on the first heat exchange unit 2 according to the first embodiment.

[0088] (Vaporization section) The vaporization unit 4 vaporizes the liquid raw material L heated in the second heat exchange unit 3. As shown in Figure 2, the gaseous raw material G vaporized in the vaporization unit 4 according to the second embodiment is supplied to the heating unit 5.

[0089] (heating part) The heating unit 5 heats the gaseous raw material G that has been vaporized in the vaporization unit 4. As shown in Figure 2, the gaseous raw material G heated in the heating unit 5 according to the second embodiment is supplied to the reaction unit 6.

[0090] (Reaction section) The reaction unit 6 brings the gaseous raw material G, heated in the heating unit 5, into contact with a catalyst to obtain a reaction product P containing ethylene and propylene. As shown in Figure 2, the reaction product P obtained in the reaction unit 6 according to the second embodiment is supplied to the second heat exchange unit 3.

[0091] (Booster booster) The ethylene and propylene production apparatus 1 according to the second embodiment may further include a pressurizing unit that pressurizes the liquid raw material L before supplying the liquid raw material L to the second heat exchange unit 3.

[0092] (Depressurization section) The ethylene and propylene production apparatus 1 according to the second embodiment may further include a depressurization unit that depressurizes the liquid raw material L before supplying the pressurized liquid raw material L, which has been pressurized in the pressurization unit, to the vaporization unit 4.

[0093] As shown in Figure 2, the ethylene and propylene production apparatus 1 according to the second embodiment further comprises a third pipe 9 for supplying the gaseous raw material G from the heating section 5 to the reaction section 6, a sixth pipe 12 for supplying the liquid raw material L from the second heat exchange section 3 to the vaporization section 4, a seventh pipe 13 for supplying the gaseous raw material G from the vaporization section 4 to the heating section 5, and an eighth pipe 14 for supplying the reaction product P from the reaction section 6 to the second heat exchange section 3.

[0094] In the ethylene and propylene production apparatus 1 according to the second embodiment, preferably at least one of the third pipe 9, the sixth pipe 12, the seventh pipe 13, and the eighth pipe 14 is insulated, and more preferably all of the third pipe 9, the sixth pipe 12, the seventh pipe 13, and the eighth pipe 14 are insulated.

[0095] The ethylene and propylene production apparatus 1 according to the second embodiment further comprises, in one aspect, a third pipe 9 for supplying the gaseous raw material G from the heating section 5 to the reaction section 6, a sixth pipe 12 for supplying the liquid raw material L from the second heat exchange section 3 to the vaporization section 4, a seventh pipe 13 for supplying the gaseous raw material G from the vaporization section 4 to the heating section 5, and an eighth pipe 14 for supplying the reaction product P from the reaction section 6 to the second heat exchange section 3, wherein at least one of the third pipe 9, the sixth pipe 12, the seventh pipe 13, and the eighth pipe 14 is insulated.

[0096] The ethylene and propylene production apparatus 1 according to the second embodiment can suppress the amount of energy required for heating by being implemented in the above manner.

[0097] [Methods for producing ethylene and propylene] The following describes embodiments of the method for producing ethylene and propylene according to the present invention. The present invention is not limited to the following embodiments.

[0098] <First Embodiment> The method for producing ethylene and propylene according to the first embodiment involves producing ethylene and propylene using the ethylene and propylene production apparatus 1 according to the first embodiment.

[0099] The method for producing ethylene and propylene according to the first embodiment may include a vaporization step of vaporizing a liquid raw material L containing water and ethanol; a first heat exchange step of heating the gaseous raw material G vaporized in the vaporization step by heat exchange; a heating step of further heating the gaseous raw material G heated in the first heat exchange step; and a reaction step of contacting the gaseous raw material G heated in the heating step with a catalyst to obtain a reaction product P containing ethylene and propylene.

[0100] The method for producing ethylene and propylene according to the first embodiment may further include a second heat exchange step in which the liquid raw material L is heated by heat exchange before being vaporized in the vaporization step.

[0101] The method for producing ethylene and propylene according to the first embodiment may further include a pressurization step of pressurizing the liquid raw material L before vaporizing the liquid raw material L in the vaporization step, and may further include a pressurization step of pressurizing the liquid raw material L before heating the liquid raw material L in the second heat exchange step.

[0102] The method for producing ethylene and propylene according to the first embodiment may further include a depressurization step in which the liquid raw material L, which has been pressurized in the pressurization step, is depressurized before it is vaporized in the vaporization step.

[0103] The method for producing ethylene and propylene according to the first embodiment may further include a power generation step at the outlet of the reaction step, in which power is generated using the thermal energy of the reaction product P.

[0104] The method for producing ethylene and propylene according to the first embodiment, when carried out in the manner described above, can reduce the amount of energy required for heating.

[0105] <Second Embodiment> The method for producing ethylene and propylene according to the second embodiment involves producing ethylene and propylene using the ethylene and propylene production apparatus 1 according to the second embodiment.

[0106] The method for producing ethylene and propylene according to the second embodiment may include a second heat exchange step of heating a liquid raw material L containing water and ethanol by heat exchange; a vaporization step of vaporizing the liquid raw material L heated in the second heat exchange step; a heating step of heating the gaseous raw material G vaporized in the vaporization step; and a reaction step of contacting the gaseous raw material G heated in the heating step with a catalyst to obtain a reaction product P containing ethylene and propylene.

[0107] The method for producing ethylene and propylene according to the second embodiment, when carried out in the manner described above, can reduce the amount of energy required for heating.

[0108] The present invention includes the following embodiments.

[0109] [1] A vaporization unit that vaporizes a liquid raw material containing water and ethanol, A first heat exchange unit heats the gaseous raw material vaporized in the aforementioned vaporization unit by heat exchange, A heating section for further heating the gaseous raw material heated in the first heat exchange section, The system comprises a reaction section in which the gaseous raw material heated in the heating section is brought into contact with a catalyst to obtain a reaction product containing ethylene and propylene, The first heat exchange unit receives the reaction product as a heat source and performs heat exchange between the reaction product and the gaseous raw material. Ethylene and propylene production apparatus. [2] The vaporization section further comprises a second heat exchange section that heats the liquid raw material by heat exchange before vaporizing it in the vaporization section. The second heat exchange unit receives the reaction product cooled by the heat exchange in the first heat exchange unit as a heat source, and performs heat exchange between the reaction product and the liquid raw material. [1] An apparatus for producing ethylene and propylene as described above. [3] A second heat exchange section heats a liquid raw material containing water and ethanol by heat exchange, A vaporization section for vaporizing the liquid raw material heated in the second heat exchange section, A heating section for heating the gaseous raw material vaporized in the aforementioned vaporization section, The system comprises a reaction section in which the gaseous raw material heated in the heating section is brought into contact with a catalyst to obtain a reaction product containing ethylene and propylene, The second heat exchange unit receives the reaction product as a heat source and performs heat exchange between the reaction product and the liquid raw material. Ethylene and propylene production apparatus. [4] An external heat transfer medium is further used as part of the heat source in heat exchange. An apparatus for producing ethylene and propylene as described in any one of [1] to [3]. [5] The system further includes a pressurizing unit that pressurizes the liquid raw material before supplying it to the vaporization unit. An apparatus for producing ethylene and propylene as described in any one of [1] to [4]. [6] The system further includes a pressurizing unit for increasing the pressure of the liquid raw material before supplying it to the second heat exchange unit. Apparatus for producing ethylene and propylene as described in [2] or [3]. [7] A first pipe for supplying the gaseous raw material from the vaporization section to the first heat exchange section, A second pipe for supplying the gaseous raw material from the first heat exchange section to the heating section, A third pipe for supplying the gaseous raw material from the heating section to the reaction section, The system further comprises a fourth pipe for supplying the reaction product from the reaction section to the first heat exchange section, At least one of the first pipe, the second pipe, the third pipe, and the fourth pipe is insulated. [1] An apparatus for producing ethylene and propylene as described above. [8] A first pipe for supplying the gaseous raw material from the vaporization section to the first heat exchange section, A second pipe for supplying the gaseous raw material from the first heat exchange section to the heating section, A third pipe for supplying the gaseous raw material from the heating section to the reaction section, A fourth pipe for supplying the reaction product from the reaction section to the first heat exchange section, A fifth pipe for supplying the reaction product from the first heat exchange section to the second heat exchange section, The system further comprises a sixth pipe for supplying the liquid raw material from the second heat exchange section to the vaporization section, At least one of the first pipe, the second pipe, the third pipe, the fourth pipe, the fifth pipe, and the sixth pipe is insulated. [2] An apparatus for producing ethylene and propylene as described above. [9] A third pipe for supplying the gaseous raw material from the heating section to the reaction section, A sixth pipe that supplies the liquid raw material from the second heat exchange section to the vaporization section, A seventh pipe for supplying the gaseous raw material from the vaporization section to the heating section, The system further comprises an eighth pipe for supplying the reaction product from the reaction section to the second heat exchange section, At least one of the third pipe, the sixth pipe, the seventh pipe, and the eighth pipe is insulated. [3] An apparatus for producing ethylene and propylene as described above.

[10] The reaction unit has two or more reactors, and each reactor is connected in series. The reaction section has connecting sections that connect each reactor to each other. The connecting portion has a third heat exchange portion that controls the temperature of the reactor by heat exchange. An apparatus for producing ethylene and propylene as described in any one of [1] to [9].

[11] The outlet of the reaction section is further provided with a power generation section that generates electricity using the thermal energy of the reaction product. An apparatus for producing ethylene and propylene as described in any one of [1] to

[10] .

[12] Ethylene and propylene are produced using a manufacturing apparatus described in any one of [1] to

[11] . A method for producing ethylene and propylene.

[0110] It should be noted that the apparatus for producing ethylene and propylene according to the present invention, and the method for producing ethylene and propylene, are not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the present invention. Furthermore, configurations, methods, etc., of embodiments other than those described above may be arbitrarily adopted and combined.

[0111] The ethylene and propylene production apparatus 1 according to the first embodiment comprises a vaporization section 4, a first heat exchange section 2, a heating section 5, a reaction section 6, and a second heat exchange section 3. However, the ethylene and propylene production apparatus according to the present invention is not limited thereto and does not necessarily have a second heat exchange section; that is, it may comprise a first heat exchange section, a heating section, and a reaction section.

[0112] The ethylene and propylene production apparatus 1 according to the first embodiment includes a first pipe 7, a second pipe 8, a third pipe 9, a fourth pipe 10, a fifth pipe 11, and a sixth pipe 12. However, the ethylene and propylene production apparatus 1 according to the present invention is not limited thereto, and if a second heat exchange section is not provided, the fifth pipe and the sixth pipe may not be provided, that is, the apparatus may include a first pipe, a second pipe, a third pipe, and a fourth pipe. [Explanation of Symbols]

[0113] 1. Ethylene and propylene production apparatus 2 1st heat exchange section 3 Second heat exchange section 4. Vaporization section 5 Heating section 6. Reaction section 7. First Piping 8. Second Piping 9. Third pipe 10. Fourth pipe 11. Fifth piping 12. Piping No. 6 13. Piping No. 7 14. Piping No. 8 L Liquid raw material G gaseous raw materials P reaction product

Claims

1. A vaporization unit that vaporizes a liquid raw material containing water and ethanol, A first heat exchange unit heats the gaseous raw material vaporized in the aforementioned vaporization unit by heat exchange, A heating section for further heating the gaseous raw material heated in the first heat exchange section, A reaction unit in which the gaseous raw material heated in the heating unit is brought into contact with a catalyst to obtain a reaction product containing ethylene and propylene, Before vaporizing the liquid raw material in the vaporization section, a second heat exchange section heats the liquid raw material by heat exchange, Before supplying the liquid raw material to the second heat exchange unit, a pressurizing unit is provided to pressurize the liquid raw material, The system includes a depressurization unit that depressurizes the liquid raw material before supplying the pressurized liquid raw material from the pressurization unit to the vaporization unit, The first heat exchange unit receives the reaction product as a heat source and performs heat exchange between the reaction product and the gaseous raw material. The second heat exchange unit receives the reaction product cooled by the heat exchange in the first heat exchange unit as a heat source, and performs heat exchange between the reaction product and the liquid raw material pressurized in the pressurization unit. Ethylene and propylene production apparatus.

2. A second heat exchange unit heats a liquid raw material containing water and ethanol by heat exchange, A vaporization section for vaporizing the liquid raw material heated in the second heat exchange section, A heating section for heating the gaseous raw material vaporized in the aforementioned vaporization section, A reaction unit in which the gaseous raw material heated in the heating unit is brought into contact with a catalyst to obtain a reaction product containing ethylene and propylene, Before supplying the liquid raw material to the second heat exchange unit, a pressurizing unit is provided to pressurize the liquid raw material, The system includes a depressurization unit that depressurizes the liquid raw material, which has been pressurized in the pressurization unit, before supplying it to the vaporization unit, The second heat exchange unit receives the reaction product as a heat source and performs heat exchange between the reaction product and the liquid raw material pressurized in the pressurization unit. Ethylene and propylene production apparatus.

3. An external heat transfer medium is further used as part of the heat source in heat exchange. An apparatus for producing ethylene and propylene according to claim 1 or 2.

4. A first pipe for supplying the gaseous raw material from the vaporization section to the first heat exchange section, A second pipe supplies the gaseous raw material from the first heat exchange section to the heating section, A third pipe for supplying the gaseous raw material from the heating section to the reaction section, A fourth pipe for supplying the reaction product from the reaction section to the first heat exchange section, A fifth pipe for supplying the reaction product from the first heat exchange section to the second heat exchange section, The system further comprises a sixth pipe for supplying the liquid raw material from the second heat exchange section to the vaporization section, At least one of the first pipe, second pipe, third pipe, fourth pipe, fifth pipe, and sixth pipe is insulated. The apparatus for producing ethylene and propylene according to claim 1.

5. A third pipe for supplying the gaseous raw material from the heating section to the reaction section, A sixth pipe for supplying the liquid raw material from the second heat exchange section to the vaporization section, A seventh pipe for supplying the gaseous raw material from the vaporization section to the heating section, The system further comprises an eighth pipe for supplying the reaction product from the reaction section to the second heat exchange section, At least one of the third pipe, the sixth pipe, the seventh pipe, and the eighth pipe is insulated. The apparatus for producing ethylene and propylene according to claim 2.

6. The reaction section has two or more reactors, and each reactor is connected in series. The reaction section has connecting sections that connect each reactor to each other. The connecting portion has a third heat exchange portion that controls the temperature of the reactor by heat exchange. An apparatus for producing ethylene and propylene according to claim 1 or 2.

7. The outlet of the reaction section is further provided with a power generation section that generates electricity using the thermal energy of the reaction product. An apparatus for producing ethylene and propylene according to claim 1 or 2.

8. A manufacturing apparatus according to claim 1 or 2 is used to produce ethylene and propylene. A method for producing ethylene and propylene.

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