Power generation system of coal power unit and internal combustion engine coupled electric ammonia production facility

Abstract

The invention relates to the technical field of power system dispatching, and discloses a power generation system of a coal power unit and an internal combustion engine coupled electric ammonia production facility, which comprises a combined power generation component used for the internal combustion engine to generate power by combusting fuel, and the power drives a generator to generate power; the high-pressure recovery part is used for recovering multi-stage waste heat in the electric ammonia production process flow and flue gas waste heat of the combined power generation part; according to the invention, the electric ammonia gas production facility capable of rapidly changing power is combined with the coal-electricity platform, and the platform advantages of multiple energy forms, high automation level, perfect supporting facilities and the like of the coal-electricity and internal combustion engine platform and the advantage of rapid power regulation of the electric ammonia production facility are utilized; the advantages of the two are complementary, the flexibility of a coal power platform is improved, the energy efficiency of the system is improved, and meanwhile, the source of SCR denitration materials of the coal power unit is met.

Description

Technical Field

[0001] The present invention relates to the technical field of power system dispatching, and in particular to a power generation system of a coal-fired power unit and an internal combustion engine coupled with an electric ammonia production facility. Background Art

[0002] The scale of a single coal-fired power generation unit is large and can meet the needs of large-scale peak regulation. However, due to the existence of high-inertia links such as coal powder, combustion and steam-water, the flexibility of the coal-fired power unit itself is relatively low, and the frequency regulation response speed is low and the accuracy is poor, so it is unable to provide high-quality frequency regulation services alone.

[0003] The main method to improve the peak-shaving and frequency-regulating capabilities of coal-fired power units is to install electrochemical energy storage facilities. The advantages of electrochemical energy storage, such as instant response and fast power regulation speed, can be brought into play to make up for the shortcomings of thermal power units, such as slow response speed and weak power regulation capability, and realize joint frequency regulation with coal-fired power units. This technology has been widely used, but it also has certain disadvantages, including: 1) Single function. In addition to the frequency regulation function, electrochemical energy storage has no other functions; 2) Short service life. Frequency regulation requires frequent charging and discharging at the minute level, and electric energy storage generally has obvious limitations on the number of discharges, resulting in a very short service life. 3) Poor continuous frequency regulation capability. There are limitations on charging and discharging time and storage capacity, which makes it impossible to continuously perform one-way frequency regulation for a long time, limiting the overall frequency regulation effectiveness; 4) Obvious space limitations. The energy density of electric energy storage is still not high, and its layout in thermal power plants is still subject to space limitations.

[0004] One approach to improving the peak-shaving and frequency-regulating capabilities of coal-fired power units is to add electrode boilers to them, taking advantage of their fast regulation rate, high power density, low unit cost, and long service life. After being arranged in a coal-fired power plant, the overall peak-shaving and frequency-regulating performance of the power plant can be changed through flexible thermal-electric conversion. However, the existing patented technology does not solve the problem of loss of electrothermal conversion efficiency. The electricity used by the electrode boiler is generated by the high-temperature and high-pressure steam of the coal-fired power unit to drive the steam turbine. Due to condensation losses, the efficiency of generating electricity in this link is only about 45%. The electrode boiler then converts the electricity into hot water (or steam), which actually causes unnecessary losses. Although the overall peak-shaving and frequency-regulating performance of the coal-fired power unit has been improved, it has come at a high energy efficiency and economic cost. Summary of the invention

[0005] In view of the problems existing in the power generation systems of the above-mentioned existing coal-fired power units and internal combustion engine-coupled electric ammonia production facilities, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a power generation system of a coal-fired power unit and an internal combustion engine coupled with an electric ammonia production facility, and its purpose is to provide a power generation system of a coal-fired power unit and an internal combustion engine coupled with an electric ammonia production facility, so as to achieve, in terms of electricity, through the start and stop of the internal combustion engine, the minute-level rapid adjustment characteristics, and the second-level rapid adjustment characteristics of the electric ammonia production facility, to improve the flexibility of the power generation side, thereby meeting the growing minute-level frequency regulation needs of the power system; in terms of heat, through the high-pressure heater and the low-pressure heater of the coal-fired unit, the waste heat in the electrolytic ammonia production process is recovered in stages, thereby improving the overall energy efficiency of the system; in terms of function, the produced ammonia is used as the source of the main raw material for the SCR out-of-stock of the power plant, without the need for external purchase, reducing the space occupied by storage warehouses and ammonia production equipment, and solving the problem of raw material procurement and inventory space occupation.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a power generation system of a coal-fired power unit and an internal combustion engine coupled to an electric ammonia production facility includes a combined power generation component, which is used for the internal combustion engine to generate power by burning fuel, and the power drives the generator to generate electricity; a high-voltage recovery component, which is used to recover multi-stage waste heat in the electric ammonia production process and flue gas waste heat from the combined power generation component; and a low-pressure recovery component, which is used to recover multi-stage waste heat in the electric ammonia production process.

[0008] As a preferred solution of the power generation system of the coal-fired power generation unit and the internal combustion engine coupled with the electric ammonia production facility described in the present invention, the combined power generation components include: a generator set coupled with a coal-fired power generation unit and an internal combustion engine, which is used for the internal combustion engine to run using natural gas or other fuels, and the mechanical energy generated during the combustion process is converted into electrical energy; the coal-fired power generation unit burns coal to generate high-temperature and high-pressure steam, and the steam drives the generator to generate electricity; and electric ammonia is used to produce ammonia and quickly respond to changes in grid frequency or a large increase or decrease in power supply in a short period of time.

[0009] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility described in the present invention, the high-pressure recovery component includes a high-pressure heater for recovering the heat of the material of the electric ammonia production and thereby controlling the material heating temperature; a low-pressure heater for recovering the heat of the material of the electric ammonia production and thereby improving the utilization of waste heat.

[0010] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility described in the present invention, the electric ammonia production includes: an electrolyzer: using excess electric energy to electrolyze water to produce hydrogen and oxygen; a reactor, used to synthesize ammonia from hydrogen and nitrogen under high pressure and a catalyst; a material preheater, used to heat the material; and a material heater, used to heat the heated material again.

[0011] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility described in the present invention, the electric ammonia production also includes a material preheater for heating the material; and a material heater for reheating the heated material.

[0012] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility described in the present invention, the electric ammonia production also includes a condenser, which condenses the steam discharged from the electric ammonia production into water, and the cooled water is returned to the water feed pump for recycling; and a separator, which separates the waste and ammonia produced by the reaction.

[0013] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled electric ammonia production facility described in the present invention, the power generation unit coupled with the internal combustion engine includes a deaerator to remove dissolved oxygen in the water to prevent corrosion; a feed water pump to pressurize the deoxygenated water and send it to the boiler for continued circulation; a condensate pump to collect the steam condensate discharged from the turbine and send it back to the feed water pump for recirculation.

[0014] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility described in the present invention, the power generation unit coupled with the internal combustion engine also includes a boiler, which heats water into steam, and the steam enters the steam turbine; the steam turbine drives the turbine to rotate through the high-temperature and high-pressure steam, and the rotating turbine drives the generator to generate electricity.

[0015] As a preferred solution of the power generation system of the coal-fired power unit and the internal combustion engine coupled electric ammonia production facility described in the present invention, the power generation unit coupled with the internal combustion engine also includes a condenser, which condenses the steam exhausted by the steam turbine into water, and the cooled water is returned to the feed water pump for recycling; a desulfurization device, which removes sulfur dioxide in the flue gas to reduce air pollution; and a denitrification device, which removes nitrogen oxides in the flue gas to reduce air pollution.

[0016] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for using a power generation system of a coal-fired power generation unit and an internal combustion engine coupled to an electric ammonia production facility, including a power generation system of a coal-fired power generation unit and an internal combustion engine coupled to an electric ammonia production facility, and,

[0017] (a) A coal-fired power unit coupled with an internal combustion engine and a generator set and ammonia produced by electricity are used as the power source of the system, and mechanical energy is generated by burning fuel and driving the connected generator to generate electrical energy; (b) when power adjustment is required, the power of the coal-fired power unit coupled with an internal combustion engine and ammonia produced by electricity in step (a) is adjusted; (c) the high-pressure heater recovers the waste heat generated by the ammonia produced by electricity in step (a) and step (b); (d) the low-pressure heater recovers the waste heat generated by the ammonia produced by electricity in step (a) and step (b).

[0018] Beneficial effects of the present invention: The present invention combines an electric ammonia facility with rapidly variable power with a coal-fired power platform, utilizing the advantages of coal-fired power and internal combustion engine platforms, such as diversified energy forms, high automation levels, and complete supporting facilities, and the advantages of electric ammonia facilities for rapid power adjustment, to complement each other's advantages, thereby improving the flexibility of the coal-fired power platform while improving the energy efficiency of the system, and at the same time meeting the source of SCR denitrification materials for coal-fired power units. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 It is a schematic diagram of the overall process of the present invention.

[0021] In the figure:

[0022] 100. Combined power generation components; 200. High-voltage recovery components; 300. Low-voltage recovery components; 101. Power generation units combining coal-fired power units and internal combustion engines; 102. Electricity-generated ammonia. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] Example 1

[0028] Reference Figure 1 , which is the first embodiment of the present invention, provides a power generation system of a coal-fired power unit, an internal combustion engine coupled to an electric ammonia production facility 102, the device includes a combined power generation component 100, which is used for the internal combustion engine to generate power by burning fuel, and the power drives the generator to generate electricity; a high-pressure recovery component 200, which is used to recover multi-stage waste heat in the process flow of electric ammonia production 102 and waste heat from flue gas of the combined power generation component 100; a low-pressure recovery component 300, which is used to recover multi-stage waste heat in the process flow of electric ammonia production 102.

[0029] Specifically, in terms of electricity, the coal-fired power units are coupled with internal combustion engine power generation and electric ammonia 102 to jointly respond to the peak and frequency regulation needs of the power system. When the power regulation demand signal is received, the regulation demand borne by different units is reasonably allocated, thereby maximizing the market revenue of power auxiliary services while meeting the system flexibility.

[0030] When used, coal-fired power units: refers to thermal power plants that use coal as fuel. Such power plants can provide stable base load power and have large power regulation capacity to cope with large-scale load changes in the power grid. However, their ability to quickly adjust output power is relatively weak, that is, the regulation quality is low, because the coal combustion process requires a certain amount of time to increase or decrease fuel supply and adjust boiler temperature, etc.

[0031] Internal combustion engine generator set: usually refers to a small to medium-sized power generation device that uses natural gas, diesel or other liquid fuels to drive an internal combustion engine to generate electricity. Compared with large coal-fired power plants, internal combustion engine power plants can start and stop faster and are therefore more adaptable to short-term load fluctuations. However, the maximum power provided by a single internal combustion unit is often not as good as that of a large coal-fired unit.

[0032] Ammonia Power 102 Facility: This is a process of producing hydrogen by electrolyzing water, and then reacting the hydrogen with nitrogen to form ammonia. PEM (proton exchange membrane) electrolyzer technology is mentioned, which allows for more efficient and flexible water electrolysis operations, thereby quickly adjusting hydrogen production according to changes in electricity demand. Due to its high efficiency and fast response characteristics, it can be considered one of the best energy storage solutions in some cases. However, a single Ammonia Power 102 device may not have a very high power output level.

[0033] Complementary advantages: When the three different power generation / energy storage methods mentioned above are integrated together, their respective advantages can be fully utilized. For example, when it is necessary to quickly respond to changes in grid frequency or increase or decrease power supply in a short period of time, this can be achieved by starting the internal combustion engine generator set or adjusting the working state of the electric ammonia 102 facility; while long-term stable power supply mainly depends on coal-fired power units. The advantage of this is that while ensuring sufficient total regulation capacity, it also improves the regulation quality and flexibility of the overall system.

[0034] Example 2

[0035] Reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the high-pressure recovery component 200 includes a high-pressure heater for recovering the material heat of the electric ammonia 102 and then controlling the material heating temperature; a low-pressure heater for recovering the material heat of the electric ammonia 102 and then improving the waste heat utilization.

[0036] The electrolyzer uses excess electricity to electrolyze water to produce hydrogen and oxygen. The reactor is used to synthesize ammonia from hydrogen and nitrogen under high pressure and catalyst. The material preheater is used to heat the material. The material heater is used to heat the heated material again.

[0037] The material preheater is used to heat the material; the material heater is used to heat the heated material again; the condenser condenses the steam discharged from the electric ammonia 102 into water, and the cooled water is sent back to the water pump for recycling; the separator separates the waste and ammonia produced by the reaction; the desulfurization device removes sulfur dioxide in the flue gas to reduce air pollution; the denitrification device removes nitrogen oxides in the flue gas to reduce air pollution.

[0038] When in use, in terms of heat, ammonia is produced through the Haber reaction, specifically nitrogen and hydrogen at 20.26MP and 400℃, through an iron compound catalyst (Fe3+), a chemical reaction will occur to produce ammonia. The reaction is a reversible reaction, and the forward process is an exothermic process. The reaction formula is as follows:

[0039]

[0040] In addition to the existing method of recovering the waste heat of internal combustion engine flue gas through coal-fired high-pressure heaters, this patent proposes to recover the multi-stage waste heat and the waste heat of internal combustion engine flue gas in the process of electric ammonia 102 by cascading high-pressure heaters and low-pressure heaters of coal-fired units, such as Figure 1As shown, the details are as follows: 1) The high-pressure heater recovers the heat of the material after the material heater and before the material preheater through the heat exchanger, thereby controlling the material heating temperature; 2) The low-pressure heater recovers the heat after the material preheater and before the condenser through the heat exchanger, thereby improving the utilization of waste heat before the condenser; thereby improving the overall energy efficiency of the system;

[0041] In terms of function, the produced ammonia is used as the source of the main raw material for SCR destocking in the power plant. The reaction equation is as follows. The amount of ammonia produced by electricity 102 is controlled in real time according to the power plant demand, thereby achieving ammonia self-sufficiency in the power plant.

[0042] 4NO+4NH3+O2→4N2+6H2O, 2NO2+4NH3+O2→3N2+6H2O

[0043] The forward process of ammonia production is an exothermic process, and a large amount of heat will be generated in the process. When ammonia is produced alone, the heat of the material after the material heater and before the material preheater will be used to generate low-pressure steam, and then transmitted to other places for use. The heat of the material after the material preheater and before the condenser will be directly cooled, resulting in heat loss. It can be seen that the overall energy utilization rate is low. Through the cascade recovery of the two parts of heat by this patent, the heat exchange heat is directly absorbed and utilized by the steam-water system of the coal-fired power unit without loss or loss. The produced ammonia is used as the source of the main raw material for the SCR out-of-stock of the power plant, so there is no need to purchase urea and other ammonia production from outside, which reduces the space occupied by storage warehouses and ammonia production equipment, solves the problem of raw material procurement and inventory space, and improves safety.

[0044] Example 3

[0045] Reference Figure 1 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: the combined power generation component 100 includes,

[0046] The generator set 101, which is a coupling between a coal-fired power unit and an internal combustion engine, is used for the internal combustion engine to run on natural gas or other fuels, and the mechanical energy generated during the combustion process is converted into electrical energy; the coal-fired power unit burns coal to generate high-temperature and high-pressure steam, and the steam drives the generator to generate electricity; the electric ammonia 102 is used to produce ammonia and quickly respond to changes in the frequency of the power grid or to increase or decrease power supply in a large amount in a short period of time.

[0047] The deaerator removes dissolved oxygen from the water to prevent corrosion; the feedwater pump pressurizes the deoxygenated water and sends it to the boiler to continue circulating; the condenser pump collects the steam condensate discharged from the turbine and sends it back to the feedwater pump for recirculation; the boiler heats the water into steam, and the steam enters the steam turbine; the steam turbine uses high-temperature and high-pressure steam to drive the turbine to rotate, and the rotating turbine drives the generator to generate electricity; the condenser condenses the steam discharged from the steam turbine into water, and the cooled water is sent back to the feedwater pump for recycling.

[0048] In summary, the internal combustion engine with rapidly variable power is coupled with the coal-fired power platform to form a coupled power generation system, and the coupled power generation system is combined with the electric ammonia 102 gas facility. In terms of electricity, the internal combustion engine start and stop, minute-level rapid adjustment characteristics, and the electric ammonia 102 facility's second-level rapid adjustment characteristics are used to improve the flexibility of the power generation side, thereby meeting the power system's growing minute-level frequency regulation needs; in terms of heat, the waste heat in the electrolytic ammonia production process is recovered in stages through the high-pressure heater and low-pressure heater of the coal-fired unit, thereby improving the overall energy efficiency of the system; in terms of function, the produced ammonia is used as the source of the main raw material for the SCR out-of-stock of the power plant, without the need for external purchase, reducing the space occupied by storage warehouses and ammonia production equipment, and solving the problem of raw material procurement and inventory space.

[0049] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0050] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A power generation system of a coal-fired power unit and an internal combustion engine coupled with an electric ammonia production facility, characterized in that: include, A combined power generation component (100) is used for the internal combustion engine to generate power by burning fuel, and the power drives the generator to generate electricity; A high-voltage recovery component (200) is used to recover multi-stage waste heat in the electric ammonia production process and flue gas waste heat of the combined power generation component (100); The low-pressure recovery component (300) is used to recover multi-stage waste heat in the process of producing ammonia from electricity.

2. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 1 is characterized in that: The combined power generation component (100) comprises: A generator set (101) in which a coal-fired power unit is coupled with an internal combustion engine, wherein the internal combustion engine is operated using natural gas or other fuels, and the mechanical energy generated during the combustion process is converted into electrical energy; the coal-fired power unit burns coal to generate high-temperature and high-pressure steam, and the steam drives the generator to generate electricity; Electric ammonia (102) is used to produce ammonia and quickly respond to changes in grid frequency or to increase or decrease power supply in a short period of time.

3. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 2 is characterized in that: The high-pressure recovery component (200) comprises: A high-pressure heater, used to recover the heat of the material of the electric ammonia production (102), thereby controlling the heating temperature of the material; The low-pressure heater is used to recover the material heat of the electric ammonia production (102), thereby improving the utilization of waste heat.

4. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 3 is characterized in that: The electro-ammonia production (102) comprises: Electrolyzers, which use excess electricity to electrolyze water to produce hydrogen and oxygen; Reactor, used to synthesize ammonia from hydrogen and nitrogen under high pressure and catalyst.

5. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 4 is characterized in that: The electro-ammonia production (102) further comprises: Material preheater, used to heat the material; The material heater is used to heat the heated material again.

6. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 5 is characterized in that: The electro-ammonia production (102) further comprises: A condenser condenses the steam discharged from the electric ammonia production (102) into water, and the cooled water is sent back to the water feed pump for recycling; A separator is used to separate the waste and ammonia produced by the reaction.

7. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 6 is characterized in that: The coal-fired power generation unit and the internal combustion engine coupled power generation unit (101) comprises: Deaerator, which removes dissolved oxygen from water to prevent corrosion; The feed water pump pressurizes the deoxygenated water and sends it to the boiler to continue circulating; The condensate pump collects the steam condensate discharged from the turbine and sends it back to the feed water pump for recirculation.

8. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 7 is characterized in that: The generator set (101) in which the coal-fired power generation unit is coupled with an internal combustion engine further comprises: The boiler heats the water into steam, which goes to the steam turbine; A steam turbine uses high-temperature and high-pressure steam to drive the turbine to rotate, and the rotating turbine drives the generator to generate electricity.

9. The power generation system of the coal-fired power unit and the internal combustion engine coupled with the electric ammonia production facility according to claim 8 is characterized in that: The generator set (101) in which the coal-fired power generation unit is coupled with an internal combustion engine further comprises: The condenser condenses the steam discharged from the steam turbine into water, and the cooled water is sent back to the feedwater pump for recycling; Desulfurization device, which removes sulfur dioxide from flue gas and reduces air pollution; Denitrification device removes nitrogen oxides from flue gas and reduces air pollution.

10. A method for using a power generation system of a coal-fired power plant and an internal combustion engine coupled to an electric ammonia production facility, comprising the power generation system of a coal-fired power plant and an internal combustion engine coupled to an electric ammonia production facility as claimed in any one of claims 1 to 9, and: (a) using a generator set (101) coupled with a coal-fired power unit and an internal combustion engine and ammonia production (102) as a system power source, generating mechanical energy by burning fuel and driving a connected generator to generate electrical energy; (b) when power regulation is required, regulating the power of the coal-fired power generation unit in step (a) and the power generation unit (101) coupled with the internal combustion engine and the electric ammonia production unit (102); (c) the high-pressure heater recovers and utilizes the waste heat generated by the electric ammonia production (102) in step (a) and step (b); (d) The low-pressure heater recovers and utilizes the waste heat generated by the electric ammonia production (102) in step (a) and step (b).

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