CN211063345U - Auxiliary service system for ammonia internal combustion generator of thermal power plant - Google Patents
Auxiliary service system for ammonia internal combustion generator of thermal power plant Download PDFInfo
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- CN211063345U CN211063345U CN201922352648.6U CN201922352648U CN211063345U CN 211063345 U CN211063345 U CN 211063345U CN 201922352648 U CN201922352648 U CN 201922352648U CN 211063345 U CN211063345 U CN 211063345U
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Abstract
Auxiliary service system of ammonia internal combustion generator of thermal power plant includes: the auxiliary service control platform (1) controls the power and the generated energy of the ammonia fuel internal combustion generator (4) to meet the requirement of a power grid on auxiliary service of a thermal power plant through a control signal, the ammonia raw material storage and supply system (5) supplies the generated ammonia as a raw material to the ammonia fuel internal combustion generator (4) for power generation, and the generated electric energy is transmitted to the power grid through the power transmission and transformation module (2); flue gas generated by power generation of the ammonia fuel internal combustion generator (4) enters a pulverized coal boiler (303) of the thermal power plant (3) through a flue gas discharge connecting pipeline and is subjected to harmless treatment by using flue gas treatment equipment. The system can effectively improve the auxiliary service regulation capacity of peak regulation, frequency modulation and black start of the thermal power plant, increase the economic benefit of the thermal power plant and simultaneously realize carbon emission reduction of the thermal power plant.
Description
Technical Field
The utility model relates to a power grid auxiliary service technical field, in particular to thermal power plant's ammonia internal combustion engine generator auxiliary service system.
Background
In recent years, in the three northeast regions of China, the capacity of the power market is rich, but peak-adjustable power supplies such as a gas turbine and pumped storage are scarce, the contradiction between the peak adjustment of a power grid and the flexibility of a thermal power generating unit is prominent, the capacity of the power grid for absorbing new energy such as wind power, photoelectricity, hydropower and nuclear power is insufficient, and the phenomena of wind abandoning, light abandoning, water abandoning and nuclear abandoning are serious. The cogeneration unit operates in a mode of 'fixing the power by heat', and the peak regulation capacity is only about 10%, so that the peak regulation difficulty is the most prominent problem in the operation of a power grid. At present, the flexible peak regulation and reconstruction of domestic thermal power aims at a heat supply unit in winter, and how to regulate the peak in summer is a difficult problem in the presence of a plurality of thermal power plants. In order to meet the peak regulation requirement of a power grid and the survival requirement of a power plant in intense competition, deep peak regulation especially in non-heating seasons is imperative all the year.
The electric wire netting auxiliary service means for maintaining the safe and stable operation of electric power system, guaranteeing the electric energy quality, except normal electric energy production, transport, use, by the service that power generation enterprise, electric wire netting business enterprise and power consumer provided, include: primary frequency modulation, Automatic Generation Control (AGC), peak regulation, a generation plan curve, reactive power regulation, black start and the like, and the examination is carried out by monthly settlement. At present, the management operation mode still uses a power grid dispatching center as a centralized auxiliary service transaction platform, and a dispatching instruction is sent to each power plant from the dispatching center in a planned way; because the instruction has a certain delay, and some power plants do not even have AGC control at present, the auxiliary service examination of a plurality of power plants is unqualified and the power plants are penalized. In addition, the fine and reward of the auxiliary service are distributed among power plants every year, so that a huge management problem exists, and complete fairness and reasonability are difficult to achieve.
In order to meet the requirement of a power grid on auxiliary service of a thermal power plant, a flexible, changeable and efficient small-scale power generation device can be arranged in the thermal power plant. The technology adopted in Europe at present is to arrange a small gas turbine in a large thermal power plant to generate power so as to meet the requirement of a power grid on auxiliary service of the thermal power plant, but the small gas turbine has the defects of complex system, carbon emission and large equipment investment.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
The utility model aims at providing a thermal power plant's ammonia internal combustion engine generator auxiliary service system to improve thermal power plant's peak regulation, frequency modulation, the auxiliary service regulation ability of black start.
(II) technical scheme
For solving the problem, according to the utility model discloses an aspect, the utility model provides an ammonia internal combustion generator auxiliary service system of thermal power plant, including thermal power plant, still include: the system comprises an auxiliary service control platform, a power transmission and transformation module, a thermal power plant, an ammonia fuel internal combustion generator and an ammonia raw material storage and supply system; the auxiliary service control platform controls the power and the generated energy of the ammonia fuel internal combustion generator through the control signal to meet the requirement of a power grid on auxiliary service of a thermal power plant; the ammonia raw material storage and supply system supplies the generated ammonia as a raw material to the ammonia fuel internal combustion generator for power generation, and transmits the generated electric energy to a power grid through the power transmission and transformation module; flue gas generated by power generation of the ammonia fuel internal combustion generator enters flue gas treatment equipment in a pulverized coal boiler of a thermal power plant through a flue gas discharge connecting pipeline for harmless treatment.
Further, the auxiliary service for the thermal power plant comprises any one of peak regulation, frequency regulation and black start of the thermal power plant.
Further, the auxiliary service of the thermal power plant is the peak regulation of the thermal power plant; the power transmission and transformation module is electrically connected with the ammonia raw material storage and supply system to receive a control signal of the auxiliary service control platform and control the ammonia raw material storage and supply system to run in a variable load mode, and surplus peak shaving electric quantity in the thermal power plant is consumed; or the auxiliary service control platform controls the ammonia fuel internal combustion generator to operate through the control signal, and the electric quantity sent to the power grid is increased on the basis of the generated energy provided by the thermal power plant.
Furthermore, the auxiliary service of the thermal power plant is the frequency modulation of the thermal power plant; the ammonia fuel internal combustion generator is kept under a certain working load, and the auxiliary service control platform controls the ammonia fuel internal combustion generator to increase the power generation power or reduce the power generation power at a certain power generation power regulation rate through the control signal so as to meet the frequency modulation of the thermal power plant.
Further, the auxiliary service of the thermal power plant is black start; the auxiliary service control platform blackens starting signals and controls the ammonia fuel internal combustion generator to start, and the load standby requirement of a power grid on a thermal power plant is met.
Further, the power transmission and transformation module is connected with a bus at the outlet of a generator of the thermal power plant; or the power transmission and transformation module is connected with a high-voltage bus behind a booster station of the thermal power plant; or the power transmission and transformation module is connected with a plant transformer bus in the thermal power plant so as to transmit the electric energy generated by the ammonia fuel internal combustion generator to a power grid or other power utilization systems in the thermal power plant.
Further, the ammonia raw material storage and supply system is communicated with the pulverized coal boiler through an ammonia gas transmission pipeline so as to transmit ammonia gas into the pulverized coal boiler and provide an ammonia spraying raw material for desulfurization and denitrification treatment of flue gas in the pulverized coal boiler.
Further, the ammonia raw material storage and supply system is any one or combination of a liquid ammonia storage tank, a urea hydrolysis ammonia production device, a synthetic ammonia device, a liquid ammonia skid tank transport vehicle and a liquid ammonia transport pipeline.
Further, the ammonia raw material storage and supply system is a liquid ammonia storage tank and/or a urea hydrolysis ammonia production device; the liquid ammonia storage tank is used for storing or providing ammonia raw materials for the ammonia fuel internal combustion generator; the urea hydrolysis ammonia production device is used for preparing an ammonia raw material and conveying the ammonia raw material to a liquid ammonia storage tank for storage or preparing the ammonia raw material and supplying the ammonia raw material to an ammonia fuel internal combustion generator.
Further, the ammonia raw material storage and supply system is a liquid ammonia storage tank and/or a synthetic ammonia device; the liquid ammonia storage tank is used for storing or providing ammonia raw materials for the ammonia fuel internal combustion generator; the ammonia synthesis device supplies the generated ammonia raw material to an ammonia fuel internal combustion generator through hydrogen generated by the synthesis electrolysis hydrogen production equipment and nitrogen generated by the air separation device, or conveys the generated ammonia raw material to a liquid ammonia storage tank for storage.
Further, the water source required in the urea hydrolysis ammonia production device comes from a chemical water plant of a thermal power plant.
According to another aspect of the utility model, the utility model provides a thermal power plant's ammonia internal combustion generator auxiliary method, include: the power grid dispatching center issues the type of power grid auxiliary service requirements of the thermal power plant in the next time period; and the auxiliary service control platform controls the ammonia raw material storage and supply system or the ammonia fuel internal combustion generator to work based on the auxiliary service type of the power grid so as to meet the auxiliary service requirement on the thermal power plant.
According to the utility model discloses a further aspect, the utility model provides a thermal power plant's carbon emission reduction method, including foretell thermal power plant's ammonia internal combustion engine generator auxiliary service system's carbon emission reduction method, it still includes:
measuring the power generation amount of the ammonia fuel generator: the standard coal fuel consumption of the auxiliary service system of the ammonia internal combustion generator of the thermal power plant is calculated according to the generated energy, and the calculation formula is as follows:
Dmarking coal＝PAmmonia×bcp＝PAmmonia×[3600/(q1×ηb×ηp×ηe)]
Wherein D isMarking coalThe standard coal combustion consumption is unit kg; pAmmoniaIs the power generation capacity of the ammonia fuel internal combustion generator (4) and has unit kWh; bcp is the coal consumption rate of the whole thermal power plant, and the unit kg/(kWh); q. q.s1The low calorific value of standard coal is q 1-29270 kJ/kg, ηbFor the efficiency of the pulverized coal fired boiler (303); ηpPipeline efficiency for auxiliary service system of ammonia internal combustion engine generator in thermal power plant ηeAbsolute electrical efficiency of an auxiliary service system for an ammonia internal combustion generator of a thermal power plant;
and determining the carbon emission of the auxiliary service system of the ammonia internal combustion generator of the thermal power plant according to the standard coal fuel consumption, wherein the carbon emission ECO2 is D standard coal × 0.67.67 0.67 × 0.001.001.
(III) advantageous effects
The above technical scheme of the utility model has following profitable technological effect:
(1) by utilizing the ammonia fuel internal combustion generator technology, the auxiliary service peak-shaving frequency modulation capability of the thermal power plant is enhanced, and the economic benefit of the thermal power plant is increased.
(2) The carbon emission amount generated by ammonia combustion is zero, so that coal-fired thermal power is partially replaced, and the carbon emission reduction of a thermal power plant can be realized.
(3) The flue gas of the ammonia internal combustion generator is directly introduced into the flue gas treatment system of the power station boiler, so that the investment of the flue gas treatment system of the ammonia power generation device is reduced.
(4) An electrolytic hydrogen production, air separation and synthetic ammonia device is arranged in the thermal power plant, and an ammonia fuel internal combustion generator device is combined, so that a flexible regulation and control operation mode of increasing and decreasing the power generation load in the thermal power plant in the positive direction or the negative direction of peak regulation and frequency modulation is realized.
Drawings
Fig. 1 is a structural diagram of an embodiment of an auxiliary service system of an ammonia internal combustion engine generator of a thermal power plant provided by the present invention;
fig. 2 is a structural diagram of another embodiment of an auxiliary service system of an ammonia internal combustion engine generator of a thermal power plant provided by the invention.
Reference numerals:
1-an auxiliary service control platform, 101-a power grid dispatching center; 102-a power plant centralized control center;
2-power transmission and transformation module, 201-transformer, 202-electric switch;
3-thermal power plant, 301-steam turbine, 302-generator, 303-pulverized coal boiler, 304-high pressure heater, 305-low pressure heater, 306-deaerator, 307-condenser, 308-multi-fuel burner, 309-booster station, 310-water pump;
4-an ammonia-fueled internal combustion generator;
5-ammonia raw material storage and supply system, 501-liquid ammonia storage tank, 502-urea hydrolysis ammonia production device, 503-purified water preparation device, 504-power plant chemical water treatment workshop, 505-ammonia synthesis device, 506-electrolysis hydrogen production device, and 507-air separation device;
a-flue gas discharge connecting pipeline, B-ammonia gas transmission pipeline, C-air, D-ammonia, E-synthetic ammonia, F-electric energy and P-water replenishing pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Fig. 1 is a structural diagram of an embodiment of an auxiliary service system of an ammonia internal combustion engine generator of a thermal power plant, please refer to fig. 1.
The utility model provides a thermal power plant's ammonia internal combustion engine generator auxiliary service system, include: the system comprises an auxiliary service control platform 1, a power transmission and transformation module 2, a thermal power plant 3, an ammonia fuel internal combustion generator 4 and an ammonia raw material storage and supply system 5; the auxiliary service control platform 1 controls the power and the generated energy of the ammonia fuel internal combustion generator 4 to meet the requirement of a power grid on the auxiliary service of the thermal power plant 3 through a control signal; the ammonia raw material storage and supply system 5 supplies the generated ammonia as a raw material to the ammonia fuel internal combustion generator 4 for power generation, and transmits the generated electric energy to a power grid through the power transmission and transformation module 2; flue gas generated by the power generation of the ammonia fuel internal combustion generator 4 enters flue gas treatment equipment in the pulverized coal boiler 303 of the thermal power plant 3 through a flue gas discharge connecting pipeline A for harmless treatment.
Specifically, the auxiliary service control platform 1 includes a power grid dispatching center 101 and a power plant centralized control center 102 which are communicatively connected to each other. The power grid dispatching center 101 is a comprehensive electric energy regulation and control platform, can obtain the generated energy of various electric energy sources (such as firepower, wind power, water power, tide and the like) in a certain area (such as a city), and can also obtain the power consumption trough time period, when the non-firepower generated energy in the power grid is sufficient or the current power consumption trough time period is not needed to provide excessive electric energy for the power grid by the thermal power plant 3, the power grid dispatching center 101 sends a dispatching instruction to the power plant centralized control center 102, the power plant centralized control center 102 receives the dispatching instruction sent by the power grid dispatching center 101, and sends a control signal to the ammonia fuel internal combustion generator 4, so that the ammonia fuel internal combustion generator 4 generates electricity, and the auxiliary electric energy is provided for the power grid, and meanwhile, the generated power of the ammonia fuel internal combustion generator 4 is controlled to meet the auxiliary service requirement for the thermal power plant 3.
The power transmission and transformation module 2 comprises a transformer 201 and an electric switch 202 which are electrically connected with each other, wherein one end of the transformer 201 is electrically connected with the ammonia fuel internal combustion generator 4; the other end of the transformer 201 is connected to a bus bar at the outlet of the generator 302 of the thermal power plant 3. After the electric energy generated by the ammonia fuel internal combustion generator 4 is inverted, the electric energy is transmitted to the power grid together with the electric energy generated by the generator 302 of the thermal power plant 3; meanwhile, the transformer 201 also receives the power generated by the generator 302, inverts the power, and transmits the inverted power to the ammonia raw material storage and supply system 5.
Preferably, one end of the transformer 201 is electrically connected to the ammonia fuel internal combustion generator 4, and the other end of the transformer 201 is connected to a high-voltage bus after the booster station 309 of the thermal power plant 3. After the electric energy generated by the ammonia fuel internal combustion generator 4 is inverted, the electric energy is transmitted to the power grid together with the electric energy generated by the generator 302 of the thermal power plant 3; meanwhile, the transformer 201 also receives the power generated by the generator 302, inverts the power, and transmits the inverted power to the ammonia raw material storage and supply system 5. At this time, both the electric power generated by the ammonia fuel internal combustion generator 4 and the electric power generated by the thermal power plant 3 need to be boosted by the booster station 9 and then transmitted to the power grid.
Preferably, one end of the transformer 201 is electrically connected with the ammonia fuel internal combustion generator 4, and the other end of the transformer 201 is connected with a plant transformer bus in the thermal power plant 3, so as to transmit the electric energy generated by the ammonia fuel internal combustion generator 4 to a power grid; meanwhile, the transformer 201 also receives the power generated by the generator 302, inverts the power, and transmits the inverted power to the ammonia raw material storage and supply system 5.
In one embodiment, the electrical switch 202 is electrically connected to the central plant control center 102. When the power grid dispatching center 101 detects that the energy of the thermal power plant 3 is sufficient enough to meet the current power consumption, a closed control signal is sent to the power plant centralized control center 102, and the power plant centralized control center 102 controls the electric switch 202 to be closed, so that a part of electric energy of the thermal power plant 3 can be transmitted to the ammonia raw material storage and supply system 5 to synthesize ammonia, and a storable ammonia raw material is generated.
Similarly, when the power consumption is in the low power consumption stage at night, the power generation amount of the thermal power plant 3 is not artificially reduced, so that the power plant centralized control center 102 sends a closed control signal, and the power plant centralized control center 102 controls the electric switch 202 to be closed, so that a part of the electric energy of the thermal power plant 3 is used for ammonia synthesis, and the electric energy transmitted to the power grid by the thermal power plant 3 is reduced.
In one embodiment, the thermal power plant 3 includes a steam turbine 301, a generator 302, a pulverized coal boiler 303, a high pressure heater 304, a low pressure heater 305, a deaerator 306, a condenser 307, a multi-fuel burner 308, a booster station 309, and a water pump 310.
The pulverized coal boiler 303 is used for receiving primary air pulverized coal and synthesis gas to burn, boiler feed water is vaporized into steam, the steam is transmitted to the steam turbine 301 to drive the steam turbine 301 to operate, the steam turbine 301 transmits a part of the steam to the deaerator 306, meanwhile, the steam turbine 301 transmits generated exhaust steam to the condenser 307 to be condensed into water, the condensed water is subjected to low-pressure heating through the low-pressure heater 305 and then flows into the deaerator 306, the deaerator 306 deaerates the inflow water through the steam, then transmits the water to the high-pressure heater 304 to be subjected to high-pressure heating, and finally transmits the water subjected to high-pressure heating as boiler feed water to the pulverized coal boiler 303 again to complete recycling of the boiler feed water.
The booster station 9 is used for boosting the power generated by the thermal power plant 3 or the ammonia fuel internal combustion generator 4 and then transmitting the boosted power to the power grid.
Preferably, the generator 302 is connected to both the booster station 9 and the electric switch 202, so that the generator 302 can provide the boosted electric power to the grid through the booster station 9 in real time; meanwhile, when the electric switch 202 is closed, the generator 302 and the transformer 201 are communicated, and the generator 302 can also invert part of the electric energy through the transformer 201 and then transmit the electric energy to the ammonia raw material storage and supply system 5 to become an energy source of the synthetic ammonia raw material.
In an embodiment, the ammonia raw material storage and supply system 5 is communicated with the pulverized coal boiler 303 through an ammonia gas transmission pipeline B to transmit ammonia gas into the pulverized coal boiler 303, so as to provide an ammonia injection raw material for desulfurization and denitrification treatment of flue gas in the pulverized coal boiler 303.
Preferably, the flue gas generated by the ammonia fuel internal combustion generator 4 enters the flue gas treatment equipment in the pulverized coal boiler 303 of the thermal power plant 3 through the flue gas discharge connecting pipeline a for harmless treatment.
In an embodiment, the auxiliary service to the thermal power plant 3 includes any one of a thermal power plant peak shaving, a thermal power plant frequency tuning, and a black start.
Preferably, the auxiliary service for the thermal power plant 3 is thermal power plant peak shaving; the power transmission and transformation module 2 is electrically connected with the ammonia raw material storage and supply system 5 so as to receive a control signal of the auxiliary service control platform 1 and control the ammonia raw material storage and supply system 5 to run in a load-variable mode, and surplus peak regulation electric quantity in the thermal power plant 3 is consumed; or the auxiliary service control platform 1 controls the ammonia fuel internal combustion generator 4 to start through the control signal, and the electric quantity transmitted to the power grid is increased on the basis of the generated energy provided by the thermal power plant 3.
Specifically, during the peak of power consumption, the power grid is often overloaded, and at this time, a generator set other than the thermal power plant 3 in normal operation needs to be put into service to meet the demand, and the generator set is an ammonia fuel internal combustion generator 4 to adjust the peak of power consumption.
Preferably, the auxiliary service of the thermal power plant 3 is the frequency modulation of the thermal power plant; the ammonia fuel internal combustion generator 4 is kept under a certain working load, and the auxiliary service control platform 1 controls the ammonia fuel internal combustion generator 4 to increase the power generation power or reduce the power generation power at a certain power generation power regulation rate through a control signal so as to meet the frequency modulation of a thermal power plant.
Specifically, frequency modulation belongs to a basic auxiliary service and is borne by the obligation of a power plant. The ammonia fuel internal combustion generator 4 tracks the power dispatching instruction sent by the auxiliary service control platform 1 within the specified output adjusting range, and adjusts the generated output in real time according to a certain adjusting rate so as to meet the requirements of power system frequency and tie line power control.
According to the demand of the power grid for the frequency-modulated load of the thermal power plant 3, it is necessary to first keep the ammonia-fueled internal combustion generator 4 operating at a certain working load, preferably, keep the ammonia-fueled internal combustion generator 4 operating at an intermediate load of its working power limit, such as: the ammonia fuel internal combustion engine 4 is rated at 5 kw, so that the ammonia fuel internal combustion engine 4 needs to be kept running at 2.5 kw.
When the power grid requires the thermal power plant 3 to increase the power generation load, the ammonia fuel internal combustion generator 4 is controlled to increase the power generation power at a faster rate so as to meet the frequency modulation requirement of the power grid on the load increase of the thermal power plant 3. When the power grid requires the thermal power plant 3 to reduce the power generation load, the ammonia fuel internal combustion generator 4 is controlled to reduce the power generation power at a faster rate so as to meet the frequency modulation requirement of the power grid on the load reduction of the thermal power plant 3.
Preferably, the auxiliary service for the thermal power plant 3 is a black start; the auxiliary service control platform 1 sends a black start signal and controls the ammonia fuel internal combustion generator 4 to operate, and the load standby requirement of a power grid on the thermal power plant 3 is met.
Specifically, the black start is that when the thermal power plant 3 is stopped due to a fault, the power is completely cut off, and the thermal power plant is in a full black state; at the moment, the ammonia fuel internal combustion generator 4 with the self-starting capability in the system is started without depending on other network help, the power generation of the thermal power plant 3 is replaced, and the recovery of the whole system is finally realized.
In an embodiment, the ammonia raw material storage and supply system 5 is any one or a combination of a liquid ammonia storage tank 501, a urea hydrolysis ammonia production device 502, a synthetic ammonia device 505, a liquid ammonia skid tank transport vehicle, and a liquid ammonia transport pipeline.
Preferably, the ammonia raw material storage and supply system 5 is a liquid ammonia storage tank 501 and/or a urea hydrolysis ammonia production device 502; the liquid ammonia storage tank 501 is used for storing or providing ammonia raw materials for the ammonia fuel internal combustion generator 4; the urea hydrolysis ammonia production device 502 is used for preparing ammonia raw material and delivering the ammonia raw material to the liquid ammonia storage tank 501 for storage or preparing ammonia raw material and supplying the ammonia raw material to the ammonia fuel internal combustion generator 4.
Specifically, in practical use, only one ammonia raw material storage and supply system 5 is required to supply the ammonia raw material. In order to prevent the ammonia raw material storage supply system 5 from stopping operation for any reason or the produced ammonia raw material from being unsatisfactory, two or more ammonia raw material storage supply systems 5 may be added as stock needs.
Fig. 1 is a structural diagram of an embodiment of an auxiliary service system of an ammonia internal combustion engine generator of a thermal power plant, please refer to fig. 1, which includes two ammonia raw material storage and supply systems 5.
Wherein the liquid ammonia tank 501 serves to store and supply the ammonia raw material to the ammonia fuel internal combustion engine generator 4, but does not have a function of preparing the ammonia raw material, and therefore the urea hydrolysis ammonia production device 502 is communicated with the liquid ammonia tank 501 through a pipe to supply the ammonia raw material prepared by the urea hydrolysis ammonia production device 502 to the liquid ammonia tank 501 for storage. The ammonia raw material produced by the urea hydrolysis ammonia production device 502 may be directly supplied to the ammonia-fueled internal combustion generator 4 to generate electricity.
Alternatively, the water source required in urea hydrolysis ammonia plant 502 is from a chemical water plant of a thermal power plant.
Specifically, the urea hydrolysis ammonia production device 502 further includes: a chemical water treatment plant 504 of a power plant, a purified water preparation device 503 and a water replenishing pump P. Wherein, the waste water or other substances used in the chemical water treatment plant 504 of the power plant are conveyed to the purified water preparation device 503 to prepare purified water, and the prepared purified water is supplemented into the urea hydrolysis ammonia production device 502 through the water supplementing pump P, so that the waste water can be repeatedly utilized, the waste water is not discharged to the external environment, the water pollution is reduced, and the economic benefit is increased.
Preferably, the ammonia raw material storage and supply system 5 is a liquid ammonia storage tank 501 and/or an ammonia synthesis device 505; the liquid ammonia storage tank 501 is used for storing or providing ammonia raw materials for the ammonia fuel internal combustion generator 4; the ammonia synthesis device 505 supplies the generated ammonia raw material to the ammonia fuel internal combustion generator 4 through the hydrogen generated by the synthesis electrolysis hydrogen production equipment 506 and the nitrogen generated by the air separation device 507, or transfers the generated ammonia raw material to the liquid ammonia storage tank 501 for storage.
Fig. 2 is a structural diagram of another embodiment of an auxiliary service system of an ammonia internal combustion engine generator of a thermal power plant, please refer to fig. 2. Three ammonia feed stock storage and supply systems 5 are included.
Specifically, in which the liquid ammonia tank 501 serves to store and supply the ammonia raw material to the ammonia fuel internal combustion engine generator 4, but does not have a function of preparing the ammonia raw material, the urea hydrolysis ammonia production device 502 and the ammonia synthesis device 505 are respectively communicated with the liquid ammonia tank 501 through pipes to supply the ammonia raw materials prepared by the urea hydrolysis ammonia production device 502 and the ammonia synthesis device 505 to the liquid ammonia tank 501 for storage. The ammonia raw materials obtained by the urea hydrolysis ammonia production unit 502 and the ammonia synthesis unit 505 may be directly supplied to the ammonia-fueled internal combustion generator 4 to generate electricity.
Wherein, the ammonia synthesis device 505 further comprises: the device comprises an electrolytic hydrogen production device 506 and an air separation device 507, wherein the electrolytic hydrogen production device 506 is used for producing hydrogen, the air separation device 507 is used for equipment nitrogen, and finally the hydrogen and the nitrogen are jointly conveyed to an ammonia synthesis device 505 through pipelines to produce ammonia raw materials.
The utility model also provides a thermal power plant's ammonia internal combustion engine generator auxiliary service method, including thermal power plant's ammonia internal combustion engine generator auxiliary service system, still include following step:
the auxiliary service control platform 1 issues a power grid auxiliary service requirement type for the thermal power plant 3 in the next time period; and controlling the ammonia raw material storage and supply system 5 or the ammonia fuel internal combustion generator 4 to work based on the type of the auxiliary service of the power grid so as to meet the requirement of the auxiliary service of the thermal power plant 3.
The utility model also provides a thermal power plant's carbon emission reduction method combines thermal power plant's ammonia internal combustion generator auxiliary service system, reduces the carbon emission volume that work produced. The auxiliary service system of the ammonia internal combustion generator of the thermal power plant generates electricity by using ammonia fuel, and the carbon emission amount generated by ammonia combustion is zero, so that the carbon emission reduction effect of the thermal power plant can be further realized by the auxiliary service system of the ammonia internal combustion generator of the thermal power plant through the carbon emission reduction method.
Specifically, the carbon emission reduction method comprises the following steps:
s1: measurement of the amount of power generation of the ammonia fuel generator 4:
s2: the standard coal fuel consumption of the auxiliary service system of the ammonia internal combustion generator of the thermal power plant is calculated according to the generated energy, and the formula is as follows:
Dmarking coal＝PAmmonia×bcp＝PAmmonia×[3600/(q1×ηb×ηp×ηe)]
Wherein D isMarking coalThe standard coal combustion consumption is unit kg; pAmmoniaIs the power generation capacity of the ammonia fuel internal combustion generator 4, in kWh; bcp is the coal consumption rate of the whole thermal power plant, and the unit kg/(kWh); q. q.s1The low calorific value of standard coal is q 1-29270 kJ/kg, ηb303 efficiency for pulverized coal fired boiler ηpPipeline efficiency for auxiliary service system of ammonia internal combustion engine generator in thermal power plant ηeThe absolute electric efficiency of an auxiliary service system of the ammonia internal combustion engine generator of the thermal power plant is achieved.
η due to the size variance of thermal power plantsb、ηp、ηeThe specific value of the heat engine plant ammonia internal combustion generator auxiliary service system can be determined according to the heat engine plant ammonia internal combustion generator auxiliary service system obtained through final assembly.
S3: and determining the carbon emission of the auxiliary service system of the ammonia internal combustion generator of the thermal power plant according to the standard coal fuel consumption.
CO produced by complete combustion of 1 ton of standard coal2The carbon emission coefficient (unit: ton carbon/ton standard coal (tc/tce)) is: the recommended value of the national institute of energy and reform committee is 0.67, the reference value of the japan institute of energy and economy is 0.68, and the reference value of the energy information service of the U.S. department of energy is 0.69. The "carbon emission coefficient" of 1kg of standard coal was tentatively taken to be 0.67 for calculation.
Therefore, carbon emission amount ECO2＝DMarking coal×0.67×0.001。
The utility model discloses aim at protecting auxiliary service system of thermal power plant's ammonia internal combustion engine generator, include: the auxiliary service control platform 1 controls the power and the generated energy of the ammonia fuel internal combustion generator 4 to meet the auxiliary service requirement of the thermal power plant 3 through a control signal, the ammonia raw material storage and supply system 5 supplies the generated ammonia as a raw material to the ammonia fuel internal combustion generator 4 for power generation, and the generated electric energy is transmitted to the thermal power plant 3 or a power grid through the power transmission and transformation module 2; flue gas generated by the ammonia fuel internal combustion generator 4 enters the pulverized coal boiler 303 of the thermal power plant 3 through a flue gas discharge connecting pipeline for harmless treatment. The system can effectively improve the auxiliary service regulation capacity of peak regulation, frequency modulation and black start of the thermal power plant, increase the economic benefit of the thermal power plant and simultaneously realize carbon emission reduction of the thermal power plant.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. Auxiliary service system of thermal power plant ammonia internal combustion generator, including thermal power plant (3), its characterized in that still includes: the system comprises an auxiliary service control platform (1), a power transmission and transformation module (2), an ammonia fuel internal combustion generator (4) and an ammonia raw material storage and supply system (5);
the auxiliary service control platform (1) controls the power and the power generation capacity of the ammonia fuel internal combustion generator (4) through control signals to meet the requirement of a power grid on the auxiliary service of the thermal power plant (3);
the ammonia raw material storage and supply system (5) supplies the generated ammonia as a raw material to the ammonia fuel internal combustion generator (4) for power generation, and transmits the generated electric energy to a power grid through the power transmission and transformation module (2);
and the flue gas generated by the power generation of the ammonia fuel internal combustion generator (4) enters flue gas treatment equipment in a pulverized coal boiler (303) of the thermal power plant (3) through a flue gas discharge connecting pipeline for harmless treatment.
2. A system according to claim 1, characterized in that said auxiliary services to the thermal power plant (3) include any of thermal power plant peak shaving, thermal power plant frequency tuning and black start.
3. A system according to claim 2, characterized in that the auxiliary service to the thermal power plant (3) is thermal power plant peak shaving;
the power transmission and transformation module (2) is electrically connected with the ammonia raw material storage and supply system (5) to receive a control signal of the auxiliary service control platform (1), control the ammonia raw material storage and supply system (5) to run in a variable load mode and consume surplus peak regulation electric quantity in the thermal power plant (3); or
The auxiliary service control platform (1) controls the ammonia fuel internal combustion generator (4) to operate through a control signal, and the electric quantity transmitted to a power grid is increased on the basis of the electric energy generated by the thermal power plant (3).
4. A system according to claim 2, characterized in that the auxiliary service to the thermal power plant (3) is a thermal power plant frequency modulation;
and keeping the ammonia fuel internal combustion generator (4) under a certain working load, and controlling the ammonia fuel internal combustion generator (4) to increase the generated power or reduce the generated power at a certain generated power regulation rate by the auxiliary service control platform (1) through a control signal so as to meet the frequency modulation of a thermal power plant.
5. A system according to claim 2, characterized in that the auxiliary service to the thermal power plant (3) is a black start;
the auxiliary service control platform (1) sends a black start signal and controls the ammonia fuel internal combustion generator (4) to start, and the load standby requirement of a power grid on the thermal power plant is met.
6. The system of claim 2,
the power transmission and transformation module (2) is connected with a bus at the outlet of a generator (302) of the thermal power plant (3); or
The power transmission and transformation module (2) is connected with a high-voltage bus behind a booster station (309) of the thermal power plant (3); or
And the power transmission and transformation module (2) is connected with a plant transformation bus in the thermal power plant (3) so as to transmit the electric energy generated by the ammonia fuel internal combustion generator (4) to a power grid or other power utilization systems in the thermal power plant (3).
7. The system according to claim 1, wherein the ammonia raw material storage and supply system (5) is communicated with the pulverized coal boiler (303) through an ammonia gas transmission pipeline so as to transmit ammonia gas into the pulverized coal boiler (303) and provide an ammonia injection raw material for desulfurization and denitrification treatment of flue gas in the pulverized coal boiler (303).
8. The system according to claim 1, wherein the ammonia raw material storage and supply system (5) is any one or combination of a liquid ammonia storage tank, a urea hydrolysis ammonia production device, a synthetic ammonia device, a liquid ammonia skid tank transport vehicle and a liquid ammonia transport pipeline.
9. The system according to claim 8, characterized in that the ammonia feedstock storage and supply system (5) is a liquid ammonia storage tank and/or a urea hydrolysis ammonia plant;
the liquid ammonia storage tank is used for storing or providing ammonia raw materials for the ammonia fuel internal combustion generator (4);
the urea hydrolysis ammonia production device is used for producing ammonia raw materials and conveying the ammonia raw materials to the liquid ammonia storage tank for storage or producing the ammonia raw materials and supplying the ammonia raw materials to the ammonia fuel internal combustion generator (4).
10. The system according to claim 8, characterized in that the ammonia feedstock storage and supply system (5) is a liquid ammonia storage tank and/or a synthetic ammonia plant;
the liquid ammonia storage tank is used for storing or providing ammonia raw materials for the ammonia fuel internal combustion generator (4);
the ammonia synthesis device supplies the generated ammonia raw material to the ammonia fuel internal combustion generator (4) through hydrogen generated by the synthesis electrolysis hydrogen production equipment and nitrogen generated by the air separation device, or conveys the generated ammonia raw material to the liquid ammonia storage tank for storage.
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| CN110994611A (en) * | 2019-12-24 | 2020-04-10 | 赫普能源环境科技有限公司 | Auxiliary service system and method for ammonia internal combustion generator of thermal power plant and carbon emission reduction method |
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