Mixed gas distribution system and ammonia synthesis system comprising same

Abstract

The invention discloses a mixed gas distribution system and an ammonia synthesis system comprising the same. The mixed gas distribution system comprises a gas distribution device; the mixed gas supply route is connected with the gas distribution device; a flow guide; an upper region; and a plurality of mixed gas flow pipes which are fixed to the circumferential section of the bottom surface of the upper region, and which are connected to a plurality of openings formed in the circumferential section of the bottom surface to form a mixed gas distribution system in which the mixed gas can move. A plurality of mixed gas distribution openings for distributing mixed gas are formed on the outer surface of the gas distribution device, the upper region has a bottom surface and a side surface connecting the bottom surface and the upper wall inside the reactor, and a circular opening is formed in the center of the bottom surface of the upper region. The flow guide part is provided with a side surface which is connected with the circumference of the upper surface of the inner cylinder of the reactor and the circumference of a circular opening part formed in the center of the bottom surface of the upper area, a fixing frame is arranged on the inner side surface of the flow guide part, and the gas distribution device is supported by the fixing frame.

Description

Technical Field

[0001] The present disclosure relates to a mixed gas distribution system and an ammonia synthesis system including the same. Background Art

[0002] In order to achieve the goal of reducing greenhouse gas emissions in response to climate change and the depletion of oil resources, the need to use new renewable energy is increasing. However, the areas that meet the appropriate conditions for producing new renewable energy are limited, so it is necessary to find means for storage and transportation. For example, there is a problem that new renewable energy, which is abundant in the equatorial region and the southern hemisphere, needs to be transported to the northern hemisphere where the demand for new renewable energy is high.

[0003] In addition, new renewable energy sources have temporal variability, so they must be accompanied by power storage devices. In order to solve the problems caused by the regional bias and temporal variability of new renewable energy sources, ammonia has attracted much attention as an energy carrier. In particular, ammonia can be liquefied at 8.5 atmospheres at room temperature, so it has the advantage of being easier to store and transport than hydrogen. Therefore, as an alternative solution to the problems caused by the regional bias and temporal variability of new renewable energy sources, it is necessary to pay attention to the solution of using electricity produced from new renewable energy sources to produce hydrogen and nitrogen, and using the produced hydrogen and nitrogen as raw materials to synthesize ammonia.

[0004] Hydrogen, the main raw material in ammonia synthesis, can be produced in a water electrolyzer driven by new renewable energy such as solar energy or wind energy. New renewable energy such as solar energy or wind energy has time variability. For example, solar energy cannot be used at night. Therefore, the ammonia synthesis system cannot always operate at a fixed flow rate, and there is a problem that the flow rate fluctuations that occur during the production cycle must be predicted and handled.

[0005] In addition, when the flow rate of a raw material such as hydrogen fed into the ammonia synthesis system is reduced, there is a problem that the flow rate distribution becomes more uneven at the front end of the catalyst layer included in the ammonia synthesis reactor.

[0006] Therefore, it is necessary to develop a mixed gas distribution system and an ammonia synthesis system that can solve the above-mentioned problems. Summary of the invention

[0007] According to an aspect of the present disclosure, an ammonia synthesis system capable of coping with flow rate fluctuations occurring during a production cycle may be provided.

[0008] According to one aspect of the present disclosure, a mixed gas distribution system and an ammonia synthesis system can be provided that can maintain a uniform flow distribution at the front end of a catalyst layer included in an ammonia synthesis reactor even if the flow rate of a raw material such as hydrogen introduced is reduced.

[0009] According to one aspect of the present disclosure, a mixed gas distribution system and an ammonia synthesis system having excellent mixing efficiency of hydrogen and nitrogen as ammonia synthesis raw materials can be provided.

[0010] According to another aspect of the present disclosure, an ammonia synthesis system can be provided that can make the temperature deviation between the center and the edge of the catalyst layer uniform in the initial stage of operation, thereby improving the ammonia synthesis yield.

[0011] According to one aspect of the present disclosure, an ammonia synthesis system can be provided that preheats a catalyst layer in an early stage of operation, thereby being able to improve the ammonia synthesis yield in the early stage of operation.

[0012] The present disclosure provides a mixed gas distribution system, which includes: a gas distribution device; a mixed gas supply route, which is connected to the gas distribution device; a flow guiding guide; an upper area; and a plurality of mixed gas flow pipes, which are fixed on the circumference of the bottom surface of the upper area and connected to a plurality of openings formed on the circumference of the bottom surface so that the mixed gas can move, wherein the gas distribution device is horizontally arranged, and a plurality of mixed gas distribution openings for distributing the mixed gas are formed on the outside of the gas distribution device, the upper area has a bottom surface and a side surface connecting the bottom surface and the upper wall inside the reactor, a circular opening is formed at the center of the bottom surface of the upper area, the flow guiding guide has a side surface connecting the circumference of the upper surface of the inner cylinder of the reactor and the circumference of the circular opening formed at the center of the bottom surface of the upper area, a fixing frame is provided on the inner side surface of the flow guiding guide, and the gas distribution device is supported by the fixing frame.

[0013] In one embodiment according to the present disclosure, the mixed gas flow tube may have a bottom surface and a side surface connecting the bottom surface and an opening portion formed on the circumference of the bottom surface of the upper area, a plurality of upper opening portions formed along the circumference are formed on the upper side surface of the mixed gas flow tube, a plurality of middle opening portions formed along the circumference are formed on the middle side surface of the mixed gas flow tube, a plurality of lower opening portions formed along the circumference are formed on the lower side surface of the mixed gas flow tube, and the mixed gas flow tube includes a covering member, which is formed to surround at least a portion of the side surface of the mixed gas flow tube to provide a space for guiding the fluid that passes through the upper opening portion and then flows out to the outside of the side surface of the mixed gas flow tube toward the middle opening side.

[0014] In one embodiment according to the present disclosure, the mixed gas flow pipe may further include: a partition plate configured to divide the upper portion and the middle portion of the mixed gas flow pipe.

[0015] In one embodiment according to the present disclosure, the mixed gas distribution system may be used in an ammonia synthesis reactor.

[0016] In one embodiment of the present disclosure, the gas distribution device may be toroidal.

[0017] In an embodiment according to the present disclosure, the cooling mixed gas may be supplied from the mixed gas supply route.

[0018] In one embodiment according to the present disclosure, a conical flow guide may be provided at the center of the upper wall inside the reactor.

[0019] In an embodiment according to the present disclosure, the mixed gas supply route may include a flow regulating device.

[0020] The present disclosure provides an ammonia synthesis system, which includes: an ammonia synthesis reactor; the mixed gas distribution system, which is included in the ammonia synthesis reactor; and one or more catalyst layers, which are located downstream of the mixed gas distribution system.

[0021] In one embodiment according to the present disclosure, in the ammonia synthesis system, ammonia synthesis is performed at 10 to 300 bar.

[0022] In one embodiment according to the present disclosure, in the ammonia synthesis system, ammonia synthesis is performed at 200 to 700° C.

[0023] According to an embodiment of the present disclosure, the ammonia synthesis system can cope with flow rate fluctuations occurring during a production cycle.

[0024] According to the mixed gas distribution system and the ammonia synthesis system of one embodiment of the present disclosure, even if the flow rate of the introduced raw materials such as hydrogen is reduced, a uniform flow distribution can be maintained at the front end of the catalyst layer included in the ammonia synthesis reactor.

[0025] According to the mixed gas distribution system and the ammonia synthesis system of one embodiment of the present disclosure, it is possible to achieve excellent mixing efficiency of hydrogen and nitrogen as raw materials for ammonia synthesis.

[0026] According to an ammonia synthesis system according to another embodiment of the present disclosure, in the initial stage of operation, the temperature deviation between the center and the edge of the catalyst layer is made uniform, thereby improving the ammonia synthesis yield.

[0027] According to an ammonia synthesis system according to an embodiment of the present disclosure, the catalyst layer is preheated at the initial stage of operation, thereby being able to improve the ammonia synthesis yield at the initial stage of operation.

[0028] According to an ammonia synthesis system according to an embodiment of the present disclosure, ammonia can be synthesized in an eco-friendly manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a diagram showing a mixed gas distribution system and an ammonia synthesis reactor according to an embodiment of the present disclosure.

[0030] Figure 2 is a diagram showing a mixed gas distribution system and an ammonia synthesis system according to another embodiment of the present disclosure.

[0031] Figure 3 is a cross-sectional view showing a bottom surface of an upper region according to an embodiment of the present disclosure.

[0032] Figure 4 is a perspective view showing a mixed gas flow tube according to an embodiment of the present disclosure.

[0033] Figure 5 is a perspective view showing the interior of a mixed gas flow pipe according to an embodiment of the present disclosure.

[0034] Figure 6 is a perspective view showing the interior of a mixed gas flow pipe according to another embodiment of the present disclosure.

[0035] Reference numerals: 1: gas distribution device, 101: mixed gas distribution opening, 2: mixed gas supply route, 3: flow guide guide, 301: side, 303: fixed frame, 4: upper area, 401: bottom, 403: side, 405: circular opening, 407: multiple openings, 5: mixed gas flow tube, 522: side, 522a: upper part, 522b: middle part, 522c: lower part, 523: upper opening, 525: middle opening, 527: lower opening, 529: partition, 530: cover, 6: catalyst layer, 7: inner cylinder, 8: distribution plate, 9: conical flow guide DETAILED DESCRIPTION The advantages, features and methods of achieving the advantages and features of the present invention will become clear through the embodiments described in detail below. However, the present invention is not limited to the embodiments disclosed below, and can be implemented in a variety of different forms. The embodiments are only used to make the disclosure of the present invention complete and to fully inform the scope of the invention to those with common knowledge in the technical field to which the present invention belongs. The present invention is only defined by the scope of the claims.

[0036] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this specification have the same meanings as commonly understood by those skilled in the art in the technical field to which the present disclosure belongs.

[0037] Unless otherwise indicated in the context, a singular form used in this specification may also include a plural form.

[0038] The numerical range used in this specification includes all values ​​within its range that include the lower limit and the upper limit, increments logically derived from the form and span of the defined range, all values ​​of double definition, and all possible combinations of upper and lower limits within the numerical range defined in different forms. Unless otherwise defined in the specification of the present invention, values ​​that may exceed the numerical range due to experimental errors or rounding of numerical values ​​are also included in the defined numerical range.

[0039] The term "comprising" mentioned in this specification is an open description, which is equivalent to "having", "containing", "having", "having the characteristics" and the like, and does not exclude factors, materials or processes that are not additionally listed.

[0040] Unless otherwise defined, the unit "%" used without particular reference in the present specification means "% by weight".

[0041] Unless otherwise defined, “A to B” in this specification means “A or more and B or less”.

[0042] The present invention provides a mixed gas distribution system, which includes: a gas distribution device; a mixed gas supply route, which is connected to the gas distribution device; a flow guiding guide; an upper area; and a plurality of mixed gas flow pipes, which are fixed on the circumference of the bottom surface of the upper area and connected to a plurality of openings formed on the circumference of the bottom surface so that the mixed gas can move, wherein the gas distribution device is horizontally arranged, and a plurality of mixed gas distribution openings for distributing the mixed gas are formed on the outside of the gas distribution device, the upper area has a bottom surface and a side surface connecting the bottom surface and the upper wall inside the reactor, a circular opening is formed in the center of the bottom surface of the upper area, the flow guiding guide has a side surface connecting the circumference of the upper surface of the inner cylinder of the reactor and the circumference of the circular opening formed in the center of the bottom surface of the upper area, a fixing frame is provided on the inner side surface of the flow guiding guide, and the gas distribution device is supported by the fixing frame.

[0043] According to an embodiment of the present disclosure, a mixed gas distribution system and an ammonia synthesis system including the same can maintain uniform flow distribution at the front end of the catalyst layer included in the ammonia synthesis reactor even if the flow rate of the raw materials such as hydrogen introduced is reduced.

[0044] In addition, according to the mixed gas distribution system and the ammonia synthesis system according to an embodiment of the present disclosure, it is possible to achieve excellent mixing efficiency of hydrogen and nitrogen as raw materials for ammonia synthesis.

[0045] refer to Figure 1 and Figure 3According to an embodiment of the present disclosure, a mixed gas distribution system may include: a gas distribution device 1; a mixed gas supply route 2, which is connected to the gas distribution device 1; a flow guiding guide 3; an upper area 4; and a plurality of mixed gas flow pipes 5, which are fixed on the perimeter of the bottom surface 401 of the upper area 4 and connected to a plurality of openings 407 formed on the perimeter of the bottom surface 401 so that the mixed gas can move.

[0046] The gas distribution device 1 is horizontally arranged, and a plurality of mixed gas distribution openings 101 for distributing the mixed gas are formed on the outside of the gas distribution device 1. The mixed gas supplied through the mixed gas supply path 2 can be distributed into the ammonia synthesis reactor through the mixed gas distribution openings. The gas distribution device 1 can evenly mix the mixed gas flowing in from the inner cylinder 7 and the mixed gas supplied from the mixed gas supply path 2.

[0047] The mixed gas distribution opening 101 may be formed to distribute the mixed gas in an upward direction or in a downward direction, but is not limited thereto.

[0048] refer to Figure 3 The upper region 4 may have a bottom surface 401 and a side surface 403 connecting the bottom surface 401 and the upper wall inside the reactor, and a circular opening 405 is formed at the center of the bottom surface 401 of the upper region 4. The mixed gas flowing from the inner cylinder 7 and the mixed gas supplied from the mixed gas supply path 2 flowing into the upper region 4 along the flow guide guide 3 may move toward the side direction of the upper region 4, and thus flow into the multiple mixed gas flow pipes 5 through the multiple openings 407.

[0049] The flow guide guide 3 may have a side surface 301 connecting the circumference of the upper surface of the inner cylinder 7 of the reactor and the circumference of the circular opening formed at the center of the bottom surface of the upper region 4, and a fixing frame 303 is provided on the inner side surface of the flow guide guide 3. The mixed gas flowing in from the inner cylinder 7 and the mixed gas supplied from the mixed gas supply path 2 may flow into the upper region 4 along the flow guide guide 3.

[0050] The gas distribution device 1 may be supported by a fixing frame 303 .

[0051] A distribution plate 8 may be horizontally arranged on the inner cylinder 7. A plurality of openings may be formed on the distribution plate 8. The distribution plate 8 may allow the mixed gas to flow evenly from the inner cylinder 7 to the flow guide portion 3 of the mixed gas distribution system.

[0052] refer to Figures 3 to 5 The mixed gas flow pipe 5 may have a bottom surface and a side surface 522 connecting the bottom surface and the opening portion 407 formed on the peripheral portion of the bottom surface of the upper region 4 .

[0053] A plurality of upper openings 523 formed at intervals along the circumference are formed on the side of the upper portion 522a of the mixed gas flow pipe 5, a plurality of middle openings 525 formed at intervals along the circumference are formed on the side of the middle portion 522b of the mixed gas flow pipe 5, and a plurality of lower openings 527 formed at intervals along the circumference are formed on the side of the lower portion 522c of the mixed gas flow pipe 5. The mixed gas flows through the upper openings 523, the middle openings 525, and the lower openings 527. The mixed gas flow pipe 5 includes a cover 530 formed to surround at least a portion of the side of the mixed gas flow pipe 5 to provide a space for guiding the fluid that flows out to the outside of the side of the mixed gas flow pipe 5 after passing through the upper openings 523 to the middle openings 525. The cover 530 may be formed to surround at least one of the group consisting of the upper portion and the middle portion of the side of the mixed gas flow pipe 5.

[0054] The cover 530 guides the fluid that has passed through the upper opening 523 and then flowed out to the outside of the side of the mixed gas flow pipe 5 to the middle opening 525. This forms a flow that moves to the outside of the side of the mixed gas flow pipe 5 and then moves to the inside of the side again. The flow formed in this way can more smoothly complete the mixing of the fluids.

[0055] refer to Figure 6 , the mixed gas flow tube 5 may further include a partition 529 configured to divide the upper part and the middle part of the mixed gas flow tube 5. The partition 529 completely separates the upper part and the middle part of the mixed gas flow tube 5 so that the fluid cannot move. Therefore, the fluid flowing into the upper part of the mixed gas flow tube 5 does not directly drop to the middle part due to the partition 529, but flows out to the space between the mixed gas flow tube 5 and the cover 530 through the upper opening 523. Thereafter, the fluid flows into the mixed gas flow tube through the middle opening 525 in the space, and drops to the lower part, thereby flowing out to the outside of the mixed gas flow tube 5 through the lower opening 527. As described above, by forming a flow in which the fluid flows out to the outside of the mixed gas flow tube 5, flows into the inside again, and then flows out again, the mixing efficiency of hydrogen and nitrogen as ammonia synthesis raw materials can be improved, and a uniform flow distribution can be maintained at the front end of the catalyst layer.

[0056] In particular, the mixed gas flow pipe 5 according to an embodiment of the present disclosure may be located at the upper portion 6 of the catalyst layer. By the mixed gas flow pipe 5 being located at the upper portion of the catalyst layer, the mixed gas passing through the mixed gas flow pipe 5 may be uniformly distributed to the catalyst layer.

[0057] The mixed gas distribution system according to an embodiment of the present disclosure can be used in an ammonia synthesis reactor. Especially when the mixed gas distribution system is included in the ammonia synthesis reactor, even if the flow rate of the raw materials such as hydrogen added is reduced, it can maintain a uniform flow distribution at the front end of the catalyst layer included in the ammonia synthesis reactor, and can achieve excellent mixing efficiency of hydrogen and nitrogen as ammonia synthesis raw materials.

[0058] In one embodiment of the present disclosure, the gas distribution device 1 may be in a toroidal or circular plate shape, but is not limited thereto, and a commonly used gas distribution device may be used.

[0059] In an embodiment according to the present disclosure, the mixed gas may include at least one selected from the group consisting of hydrogen and nitrogen.

[0060] Hydrogen can be produced in an installation powered by new renewable energy sources. Specifically, hydrogen can be produced in a water electrolyzer powered by new renewable energy sources.

[0061] The new renewable energy may include at least one selected from the group consisting of solar heat, sunlight, biomass, wind, hydropower, geothermal energy, ocean energy, and waste energy. The new renewable energy has temporal variability. For example, solar energy cannot be used at night. Therefore, when hydrogen is produced in a device driven by the new renewable energy, the ammonia synthesis system cannot always operate at a certain flow rate. That is, due to the temporal variability of the new renewable energy, an ammonia synthesis system that can cope with the flow rate changes that occur during the production cycle is required.

[0062] In addition, the mixed gas supplied in the mixed gas supply path 2 may be a mixed gas of low temperature. Therefore, the mixed gas supplied in the mixed gas supply path 2 plays a role of cooling the mixed gas, and can also function as a means of cooling the mixed gas flowing in the ammonia synthesis system. For example, the cooled mixed gas can be used as a cooling means for cooling the mixed gas supplied to the catalyst layer.

[0063] refer to Figure 2 According to the mixed gas distribution system of one embodiment of the present disclosure, a conical flow guide 9 may be provided at the center of the upper wall inside the reactor. The conical flow guide 9 acts as a pre-diffuser to deflect the mixed gas so that the mixed gas entering the upper region 4 flows smoothly toward the multiple openings 407, preventing a dead zone in the upper region 4 and evenly distributing the mixed gas to the multiple openings.

[0064] According to one embodiment of the present disclosure, the mixed gas supply route 2 may include a flow regulating device. The flow regulating device can independently control the flow rate of the mixed gas in the mixed gas supply route 2. Specifically, the flow regulating device independently regulates the flow rate of the mixed gas flowing in the mixed gas supply route 2, so that the flow rate of the mixed gas entering the gas distribution device is maintained within a desired flow range.

[0065] According to an embodiment of the present disclosure, the mixed gas distribution system and the ammonia synthesis system including the same can cope with the flow rate changes during the production cycle through the flow regulating device, and even if the flow rate of the raw materials such as hydrogen added is reduced, the flow rate distribution can be kept uniform at the front end of the catalyst layer included in the ammonia synthesis reactor. The flow regulating device can be a flow regulating valve.

[0066] At this time, for convenience, in this specification, the flow rate changes that occur during the production cycle are roughly divided into three types, as described above, which can be divided into a small flow rate, a normal flow rate, and a large flow rate, which can be easily adjusted according to the common sense or judgment of ordinary technicians. It can be that the small flow rate refers to a situation where the annual average production flow rate (100%) is less than half (50%), the normal flow rate refers to a situation where the annual average production flow rate (100%) is more than half (50%) and less than 2 times (200%), and the large flow rate refers to a situation where the annual average production flow rate (100%) is more than 2 times (200%), but it is not limited to this.

[0067] The mixed gas supply route 2 may be a route branching from a main mixed gas supply route. Alternatively, the mixed gas supply route 2 may be supplied with at least one selected from the group consisting of nitrogen and hydrogen from separate nitrogen or hydrogen supply routes.

[0068] In addition, the present disclosure may provide an ammonia synthesis system including a mixed gas distribution system. The description of the mixed gas distribution system may also be applied to the ammonia synthesis system within the scope of repetition.

[0069] The present disclosure may provide an ammonia synthesis system, which includes: an ammonia synthesis reactor; a mixed gas distribution system included in the ammonia synthesis reactor; and one or more catalytic layers 6 located downstream of the mixed gas distribution system.

[0070] According to the ammonia synthesis system of one embodiment of the present disclosure, even if the flow rate of the introduced raw material such as hydrogen is reduced, a uniform flow distribution can be maintained at the front end of the catalyst layer included in the ammonia synthesis reactor.

[0071] In addition, according to the ammonia synthesis system of one embodiment of the present disclosure, it is possible to achieve excellent mixing efficiency of hydrogen and nitrogen as ammonia synthesis raw materials.

[0072] The catalytic layer 6 may be disposed in a toroidal region formed between the inner cylinder 7 and the outer wall of the ammonia synthesis reactor. The mixed gas passing through the mixed gas flow pipe 5 flows downward along the outer wall of the ammonia synthesis reactor to reach the catalytic layer 6 .

[0073] In particular, the mixed gas flow pipe 5 according to an embodiment of the present disclosure can be located on the upper part of the catalyst layer 6. By locating the mixed gas flow pipe 5 on the upper part of the catalyst layer, the mixed gas passing through the mixed gas flow pipe 5 can be evenly distributed to the catalyst layer. This can improve the ammonia synthesis yield and extend the life of the catalyst layer.

[0074] The ammonia synthesis system according to one embodiment of the present disclosure may further include a microwave heating device. The ammonia synthesis system further includes a microwave heating device, which can make the temperature deviation between the center and the edge of the catalyst layer 6 uniform in the initial operation, thereby improving the ammonia synthesis yield. Specifically, the microwave heating device can make the temperature deviation between the center and the edge of the catalyst layer uniform by irradiating microwaves to the catalyst layer in the initial operation. In addition, the microwave heating device preheats the catalyst layer that is not fully preheated in the initial operation, thereby improving the ammonia synthesis yield in the initial operation.

[0075] The number of microwave heating devices may be 1 or more, 2 or more, 3 or more, 4 or more, 5 or more, or 8 or more, but is not limited thereto. The number of microwave heating devices may be increased according to the size of the reactor, and the installation position may be adjusted for efficient microwave irradiation.

[0076] The ammonia synthesis system may further include a microwave guide. The microwave guide enables the microwave irradiated from the microwave heating device to reach the catalyst layer more effectively. Of course, the shape or setting position of the guide may be changed according to the microwave waveform.

[0077] In one embodiment according to the present disclosure, the catalytic layer 6 can be more than 1, more than 2, more than 3, more than 4, more than 5, more than 6, more than 7, more than 10, less than 20, less than 10, less than 8, less than 7, less than 6, less than 5, less than 4, less than 3, less than 2, less than 1 or an interval of these values.

[0078] In the ammonia synthesis system according to an embodiment of the present disclosure, ammonia synthesis may be performed at 1 to 500 bar or 10 to 300 bar.

[0079] In addition, in the ammonia synthesis system according to an embodiment of the present disclosure, ammonia synthesis may be performed at 100 to 800°C or 200 to 700°C.

[0080] The ammonia synthesis system according to one embodiment of the present disclosure may further include: a heat exchanger, which is arranged downstream of the catalyst layer 6 to remove heat from the effluent of the catalyst layer. The heat exchanger may be arranged to surround the catalyst layer or its periphery. The ammonia synthesis system according to the present disclosure may also include a heat exchanger, so that it can have an additional heat removal unit in addition to supplying the cooling mixed gas. Thus, the ammonia synthesis system can be flexibly operated.

[0081] The above-described contents are merely examples of applying the principles of the present disclosure, and other structures may also be included without departing from the scope of the present disclosure.

Claims

1. A mixed gas distribution system, comprising: Gas distribution device; a mixed gas supply route connected to the gas distribution device; a flow guiding guide; Upper area; and A plurality of mixed gas flow pipes are fixed to the perimeter of the bottom surface of the upper region and connected to a plurality of openings formed on the perimeter of the bottom surface so as to allow the mixed gas to flow. in, The gas distribution device is arranged horizontally, A plurality of mixed gas distribution openings for distributing the mixed gas are formed on the outside of the gas distribution device. The upper region has a bottom surface and a side surface connecting the bottom surface and an upper wall inside the reactor, A circular opening is formed at the center of the bottom surface of the upper region. The flow guide guide has a side surface connecting the circumference of the upper surface of the inner cylinder of the reactor and the circumference of the circular opening formed at the center of the bottom surface of the upper region. A fixing frame is provided on the inner side of the flow guiding guide portion. The gas distribution device is supported by the fixing frame.

2. The mixed gas distribution system according to claim 1, wherein: The mixed gas flow pipe has a bottom surface and a side surface connecting the bottom surface and an opening formed on the perimeter of the bottom surface of the upper region. A plurality of upper openings are formed on the upper side of the mixed gas flow pipe and are spaced apart along the circumference. A plurality of intermediate openings are formed on the intermediate side of the mixed gas flow pipe and are spaced apart along the circumference. A plurality of lower openings are formed on the lower side of the mixed gas flow pipe and are spaced apart along the circumference. The mixed gas flow pipe includes a cover formed to surround at least a portion of a side surface of the mixed gas flow pipe to provide a space for guiding a fluid that flows out of the side surface of the mixed gas flow pipe after passing through the upper opening toward the middle opening.

3. The mixed gas distribution system according to claim 2, wherein: The mixed gas flow pipe further includes a partition plate configured to divide the upper portion and the middle portion of the mixed gas flow pipe.

4. The mixed gas distribution system according to claim 1, wherein: The mixed gas distribution system is used in an ammonia synthesis reactor.

5. The mixed gas distribution system according to claim 1, wherein: The gas distribution device is annular.

6. The mixed gas distribution system according to claim 1, wherein: The cooling mixed gas is supplied from the mixed gas supply path.

7. The mixed gas distribution system according to claim 1, wherein: A conical flow director is provided at the center of the upper wall inside the reactor.

8. The mixed gas distribution system according to claim 1, wherein: The mixed gas supply route includes a flow regulating device.

9. An ammonia synthesis system, comprising: Ammonia synthesis reactor; The mixed gas distribution system according to claim 1, which is included in the ammonia synthesis reactor; and One or more catalyst layers are located downstream of the mixed gas distribution system.

10. The ammonia synthesis system according to claim 9, wherein: In the ammonia synthesis system, ammonia synthesis is performed at 10 to 300 bar.

11. The ammonia synthesis system according to claim 9, wherein: In the ammonia synthesis system, ammonia synthesis is performed at 200 to 700°C.

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