CN210861803U - Hundred KW-MW grade SOFC cold and hot electric system of compact - Google Patents
Hundred KW-MW grade SOFC cold and hot electric system of compact Download PDFInfo
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- CN210861803U CN210861803U CN201921893198.5U CN201921893198U CN210861803U CN 210861803 U CN210861803 U CN 210861803U CN 201921893198 U CN201921893198 U CN 201921893198U CN 210861803 U CN210861803 U CN 210861803U
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Abstract
The utility model discloses a hundred kW-MW level SOFC cold and hot electric system of compact, including SOFC power generation system, changes in temperature energy provide system, life hot water system and deionized water system, SOFC power generation system provides the heat for SOFC power generation system, changes in temperature energy provide system and life hot water system, and the deionized water system provides the deionized water for changes in temperature ion water system and life hot water system, and SOFC power generation system, changes in temperature energy provide system, life hot water system and deionized water system are said and are connected in order. The utility model provides high system's compactness and system efficiency reach 90%, and the operation method that it provided can effectively match user load characteristic, promotes system operating efficiency more than 5%.
Description
Technical Field
The invention relates to the field of medium and low temperature heat energy recovery and power engineering, in particular to a compact hundred kW-MW stage SOFC cold and hot electric system.
Background
Solid Oxide Fuel Cells (SOFC) are third-generation Fuel cells, which operate at medium and high temperatures by using Solid Oxide as a medium to directly convert chemical energy stored in Fuel into electrical energy with high efficiency and environmental protection, and have a power generation efficiency of 60% or more, and can be used as a main power generation device in the future. At present, domestic SOFC research is mainly focused on a theoretical research level, domestic battery manufacturers lack system integration capacity, and large-scale (MW-level) SOFC power generation systems do not exist due to low battery service life and high manufacturing cost. Meanwhile, as the hundred kW-MW SOFC is manufactured at the initial stage, the system is integrated, and an application scene and an application method are still explored, how to improve the system efficiency of the hundred kW-MW SOFC and match the load characteristics of a user to improve the operation efficiency becomes a difficult problem to be solved urgently. In the waste heat utilization of the SOFC system, untreated tap water is used as a water source, and a water supply pipeline of the water source is long, so that the space layout of components of each system in the waste heat utilization is loose, and the waste heat utilization efficiency of the SOFC system is reduced. And the untreated tap water is used, and the domestic hot water is obtained by using secondary heat exchange in a domestic hot water system utilizing waste heat, so that the number of used equipment is increased, and the space layout compactness of each system component in waste heat utilization is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a, the utility model discloses concentrate on solid oxide fuel cell, the cold and warm energy provides the system, life hot water system and deionized water system among the solid oxide fuel cell cold and hot electric system, wherein deionized water system adopts deionized water to equip and handles the running water, pipeline length between each part among the cold and warm energy provides the system and the life hot water system has been shortened, greatly improved hundred kW-MW level solid oxide fuel cell system efficiency when improving each part spatial layout's of system compactness, the operation method that provides simultaneously can effectively match user load characteristic, promote system operating efficiency 5%.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the compact hundred-kW-MW-level SOFC cold and hot electric system comprises an SOFC power generation system, a cold and hot energy supply system, a domestic hot water system and a deionized water system, wherein the SOFC power generation system supplies heat for the SOFC power generation system, the cold and hot energy supply system and the domestic hot water system, the deionized water system supplies deionized water for the cold and hot energy supply system and the domestic hot water system, and the SOFC power generation system, the cold and hot energy supply system, the domestic hot water system and the deionized water system are sequentially connected through pipelines.
According to the compact hundred kW-MW stage SOFC (solid oxide fuel cell) cooling and heating system, the SOFC power generation system comprises a desulfurization device, a reformer, an air blower, an air preheater, an electric heating device, an SOFC (solid oxide fuel cell), a flue gas bypass valve and a post-combustion chamber, the SOFC comprises an SOFC anode and an SOFC cathode, the desulfurization device is communicated with the reformer, the reformer is respectively communicated with the air preheater and the SOFC anode, the air blower is communicated with the air preheater, the air preheater is communicated with a waste heat utilization system through the flue gas bypass valve, the electric heating device is positioned on a pipeline between the air preheater and the SOFC cathode.
The cooling and heating energy providing system comprises an absorption type refrigerating device, a separator II, a cold and heat storage tank, a valve I, a mixer I, a cooling and heating user and a delivery pump, wherein an air inlet of the absorption type refrigerating device is connected with an air outlet of an air preheater, an air outlet of the absorption type refrigerating device is connected with a domestic hot water system, a water inlet of the absorption type refrigerating device is connected with a deionized water system, a water outlet of the absorption type refrigerating device is respectively connected with a water inlet of the cold and heat storage tank and a water inlet of the mixer I through the separator I, a water outlet of the cold and heat storage tank is connected with a water inlet of the mixer I through a pipeline provided with the valve I, a water outlet of the mixer I is connected with the cooling and heating user, and the cooling and heating user is.
The utility model provides an aforementioned hundred kW-MW level SOFC cooling and heating electric systems of compact, life hot water system includes flue gas hot water heat exchanger, separator III, life hot water storage tank, valve II, blender II, life hot water pump and life hot water user, flue gas hot water heat exchanger air inlet and absorption refrigeration device gas outlet are connected, flue gas hot water heat exchanger water inlet and deionized water system connection, and flue gas hot water heat exchanger delivery port passes through separator III and is connected with life hot water storage tank water inlet and blender II water inlet respectively, and life hot water storage tank delivery port and blender II water inlet are through being provided with valve II's pipe connection, and blender II's delivery port passes through life hot water pump and is connected with life hot water user.
The utility model provides an aforementioned hundred kW-MW level SOFC cooling and heating electric systems of compact, life hot water system includes flue gas hot water heat exchanger, separator III, life hot water storage tank, valve II, blender II, life hot water pump and life hot water user, flue gas hot water heat exchanger air inlet and absorption refrigeration device gas outlet are connected, flue gas hot water heat exchanger water inlet and deionized water system connection, and flue gas hot water heat exchanger delivery port passes through separator III and is connected with life hot water storage tank water inlet and blender II water inlet respectively, and life hot water storage tank delivery port and blender II water inlet are through being provided with valve II's pipe connection, and blender II's delivery port passes through life hot water pump and is connected with life hot water user.
According to the compact hundred kW-MW-level SOFC cold and hot electric system, the SOFC power generation system provides heat for the SOFC power generation system, the cold and hot energy providing system and the domestic hot water system, the heat enters the post combustion chamber through partial SOFC anode outlet gas and is mixed and combusted with SOFC cathode outlet gas, chemical energy of residual fuel is converted into internal energy, the post combustion chamber outlet gas sequentially passes through the reformer to provide heat for the reformer, the air preheater provides heat for the air preheater, the absorption type refrigerating device provides energy for refrigeration and heating of the absorption type refrigerating device, the flue gas hot water heat exchanger provides heat for softened water exchanging heat in the flue gas hot water heat exchanger, the post combustion chamber outlet gas passes through the flue gas hot water heat exchanger and then is discharged into the atmosphere, and the temperature of the post combustion chamber outlet gas discharged into the atmosphere.
The operation method of the compact hundred kW-MW stage SOFC cold and hot electric system comprises the following steps:
step S1: opening a flue gas bypass valve in the SOFC preheating stage, starting a reformer, a blower, an air preheater, an electric heating device, an SOFC, a deionized water device and a tap water pump, pressurizing the air by the blower, then passing the air through the air preheater and the pipeline into the SOFC cathode, heating the air in the pipeline between the air preheater and the SOFC by the electric heating device, entering the air out of the SOFC cathode into a post-combustion chamber, entering the air at the outlet of the post-combustion chamber into the reformer, returning the air at the outlet of the reformer into the air preheater again, exhausting the air at the outlet of the air preheater into the atmosphere through the flue gas bypass valve, circulating to start the preheating process of another wheel, and after a period of time, preheating the SOFC to a specified temperature which is 600-800 ℃ after the period of preheating is finished, preheating the SOFC and simultaneously entering the deionized water device through the tap water pump, the deionized water device converts tap water into deionized water;
step S2: the SOFC stable operation stage, the SOFC preheating stage is finished, the electric heating device and the flue gas bypass valve are closed, natural gas is desulfurized by the desulfurizer and then enters the reformer, the natural gas is mixed and reformed with partial gas at the outlet of the SOFC anode, the reformed mixed gas enters the SOFC anode, the air is preheated by the air preheater after being pressurized by the blower, the electrochemical reaction is generated in the SOFC, chemical energy is directly converted into electric energy, the electric energy is converted into alternating current for users through the direct current and alternating current converter, after the electrochemical reaction is finished, the gas at the outlet of the SOFC anode is divided into two parts through the flow divider I, one part of the gas at the SOFC anode enters the reformer and is reformed with the natural gas passing through the desulfurizer, the reformed mixed gas enters the SOFC anode, the air enters the cathode after being preheated by the air preheater after being pressurized by, the circulation is carried out; the other part of SOFC anode outlet gas enters a post-combustion chamber to be mixed and combusted with SOFC cathode outlet gas, chemical energy of residual fuel is converted into internal energy, the post-combustion chamber outlet gas sequentially passes through a reformer to provide heat for the reformer, an air preheater provides heat for an air preheater, an absorption type refrigerating device provides energy for refrigeration and heating of the absorption type refrigerating device, a flue gas hot water heat exchanger provides heat for softened water exchanging heat in a flue gas hot water heat exchanger, the post-combustion chamber outlet gas is exhausted into the atmosphere after passing through the flue gas hot water heat exchanger, the temperature of the post-combustion chamber outlet gas exhausted into the atmosphere is 61-65 ℃, deionized water obtained by treatment of a deionized water device enters a separator IV to be divided into two parts, and one part of the deionized water provides cold water/heating water for cold/warm users through the absorption type refrigerating device, the separator II, a cold and heat accumulation tank and a mixer, the return water of the cold/warm user is pumped into the deionized water device through the delivery pump, so that energy is supplied to the cold/warm user in a circulating manner, cold ion water is provided for the cold/warm user in summer, the absorption type refrigerating device refrigerates, the cold and heat storage tank stores cold water, heating water is provided for the warm user in winter, the absorption type refrigerating device heats, and the cold and heat storage tank stores heating water; the other part of the deionized water is subjected to heat exchange in the flue gas hot water heat exchanger to become domestic hot water, and the domestic hot water provides domestic hot water for domestic hot water users through the mixer II. After the waste heat utilization system operates stably, the water supply amount of tap water is the domestic hot water amount and the water supplement amount of cold and warm users.
In the foregoing method for operating a compact hundred kW-MW SOFC thermal power system, when the SOFC is stopped for less than 48 hours, the method further includes: step S3: and in the SOFC heat preservation stage, starting the electric heating device, opening the flue gas bypass valve, keeping the reformer, the blower, the air preheater and the SOFC in the running state, and sequentially closing other devices of the SOFC cold and heat power system to start the SOFC preheating stage.
In the operation method of the compact hundred kW-MW-level SOFC cold and heat power system, when the system is operated in summer, the operation method of the cold and heat energy supply system, the domestic hot water system and the deionized water system comprises the following processes: tap water enters a deionized water device through a tap water pump, the tap water is processed into deionized water, the deionized water discharged from the deionized water device is divided into two parts through a separator IV, one part of the deionized water enters an absorption type refrigerating device powered by gas at the outlet of a post combustion chamber for refrigeration, cold water obtained after refrigeration by the absorption type refrigerating device is divided into two parts through a separator II, when the cold load is low, one part of the cold water is directly supplied for cold and warm users through a mixer I, the other part of the cold water is supplied to a cold and heat storage tank for storage, and a valve I is in a closed state at the moment; when the cold load is high, all cold supply water obtained after refrigeration by the absorption refrigeration device enters a mixer I through a separator II, a valve I is opened, the cold storage and heat storage tank discharges the stored cold supply water, the two water flows enter the mixer I together to supply cold water for cold and warm users, the temperature of the cold supply water is 5-9 ℃, and return water of the cold and warm users is pumped into a deionized water device through a delivery pump for recycling; the other part deionized water gets into the gaseous flue gas hot water that provides energy of afterburner export and trades and carries out the heater, the life hot water that gets through flue gas hot water heat exchanger exchange divides into two parts through separator III, when life hot water load is low, partly life hot water passes through life hot water pump through blender II and toward life hot water user, another part gets into to save in the life hot water storage tank, valve II is in the closed condition this moment, when life hot water load is high, the life hot water that gets through flue gas hot water heat exchanger exchange gets through separator III whole entering blender II that gets into, valve II opens simultaneously, life hot water storage tank emits the life hot water of storage, two strands of water get into blender II simultaneously and pass through life hot water pump toward life hot water user. After the waste heat utilization system operates stably, the water supply amount of tap water is the domestic hot water amount and the heating water supplement amount of cold and warm users.
In the operation method of the compact hundred kW-MW SOFC cold and heat power system, when the system operates in winter, the operation method of the cold and heat energy supply system, the domestic hot water system and the deionized water system includes the following steps:
tap water enters a deionized water device through a tap water pump and is processed into deionized water by the tap water, the deionized water discharged from the deionized water device is divided into two parts through a separator IV, one part of the deionized water enters an absorption type refrigerating device which provides energy by gas at the outlet of a post combustion chamber to heat, heating water obtained after the absorption type refrigerating device heats is divided into two parts through a separator II, when the heat load is low, one part of the heating water directly supplies heating water for cold and warm users through a mixer I, the other part of the heating water enters a cold accumulation tank to be stored, and at the moment, a valve I is in a closed state; when the heat load is high, all the heating water obtained after heating by the absorption type refrigerating device enters a mixer I through a separator II, simultaneously a valve I is opened, a cold accumulation and heat accumulation tank discharges the stored heating water, the two water flows enter the mixer I together to supply the heating water for a cooling and heating user, the temperature of warm deionization is 85-95 ℃, and the return water of the cooling and heating user is pumped into a deionized water device for recycling after passing through a delivery pump; the other part deionized water gets into the gaseous flue gas hot water that provides energy of afterburner export and trades and carries out the heater, the life hot water that gets through flue gas hot water heat exchanger exchange divides into two parts through separator III, when life hot water load is low, partly life hot water passes through life hot water pump through blender II and toward life hot water user, another part gets into to save in the life hot water storage tank, valve II is in the closed condition this moment, when life hot water load is high, the life hot water that gets through flue gas hot water heat exchanger exchange gets through separator III whole entering blender II that gets into, valve II opens simultaneously, life hot water storage tank emits the life hot water of storage, two strands of water get into blender II simultaneously and pass through life hot water pump toward life hot water user. After the waste heat utilization system operates stably, the water supply amount of tap water is the domestic hot water amount and the heating water supplement amount of cold and warm users.
In the operation method of the compact hundred kW-MW stage SOFC cold and hot electric system, the temperature of domestic hot water is 55-60 ℃.
Compared with the prior art, the utility model discloses an useful part lies in:
1. the utility model relates to a hundred kW-MW level SOFC thermoelectric system of compact can provide the energy of three kinds of forms of cold and hot electricity for the user simultaneously to hundred kW-MW level SOFC thermoelectric system contains cold-storage heat accumulation jar and domestic hot water storage tank, has cold and hot load regulatory function.
2. The utility model relates to a hundred kW-MW level SOFC cooling and heating systems of compact has used deionized water device to handle the running water, need not use the secondary heat transfer among the messenger life hot water system and acquire life hot water, has reduced the equipment of secondary heat transfer, has improved hundred kW-MW level SOFC cooling and heating systems compactedness of compact, has greatly improved hundred kW-MW level solid oxide fuel cell system efficiency among the hundred kW-MW level SOFC cooling and heating systems of compact, has reduced hundred kW-MW level SOFC cooling and heating systems investment cost of compact simultaneously.
3. The utility model relates to a hundred kW-MW level SOFC cooling and heating system of compact, changes in temperature energy provide system, life hot water system and deionized water system make full use of SOFC power generation system afterburning room tail gas's heat, the temperature drop behind the afterburning room export gas through flue gas hot water heat exchanger is 61-65 ℃, improves SOFC cooling and heating system's efficiency to 90%.
4. The utility model discloses well natural gasAfter passing through the desulfurizer, the solid oxide fuel cell enters the SOFC anode to be used as the fuel of the solid oxide fuel cell, SO NOx and SO in the SOFC cathode exhaust gasXThe content of (A) is less than 5mg/m3The clean and environment-friendly hundred kW-MW SOFC cold and hot electric system is realized.
5. The utility model relates to a hundred kW-MW level SOFC cold and hot electric system of compact has used electric heater unit to preheat SOFC and keep warm, shortens battery start time, and battery start time is SOFC start time 10% -50% among the prior art.
6. The utility model discloses hundred kW-MW level SOFC cooling and heating electric system operation method effectively matches user load characteristic, promotes system operating efficiency more than 5%.
Drawings
FIG. 1 is a schematic structural diagram of a hundred kW-MW stage SOFC cooling and heating system;
the meaning of the reference numerals: 1-desulfurizer 2-reformer 3-blower 4-air preheater 5-electric heating device
6-SOFC 7-DC/AC converter 8-electric user 9-separator I10-afterburner 11-absorption type refrigerating device 12-separator II 13-cold and heat accumulation tank 14-valve I15-mixer I16-cold and heat user 17-transfer pump 18-deionized water device 19-separator IV 20-flue gas hot water heat exchanger 21-separator III 22-domestic hot water storage tank 23-valve II 24-mixer II 25-domestic hot water pump 26-domestic hot water user 27-tap water pump 28-flue gas bypass valve 29-SOFC anode 30-SOFC cathode 30-SOFC cathode 27-tap water pump 28-flue gas bypass valve 29
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Detailed Description
As shown in fig. 1, the compact hundred kW-MW SOFC cold and hot electric system comprises an SOFC power generation system, a cold and hot energy supply system, a domestic hot water system and a deionized water system, wherein the SOFC power generation system supplies heat for the SOFC power generation system, the cold and hot energy supply system and the domestic hot water system, the deionized water system supplies deionized water for the cold and hot energy supply system and the domestic hot water system, and the SOFC power generation system, the cold and hot energy supply system, the domestic hot water system and the deionized water system are sequentially connected through pipelines. The deionized water system directly processes tap water through the deionized water device to obtain deionized water, and the deionized water is supplied to the cold and warm energy providing system and the domestic hot water system, so that domestic hot water is obtained without secondary heat exchange in the domestic hot water system, the use of secondary heat exchange equipment is reduced, the equipment compactness of the compact hundred-kW-MW SOFC cold and hot electrical system is improved, and the investment cost of the compact hundred-MW SOFC cold and hot electrical system is reduced. Due to the adoption of the deionized water system, the temperature of the tail gas discharged to the atmosphere at last after the combustion chamber is reduced to 61-65 ℃, and the efficiency of the hundred kW-MW level solid oxide fuel cell system in the compact hundred kW-MW level SOFC cold and hot electric system is improved to 90%. The system provides energy of three forms of cold, heat and electricity for users, and a cold and heat energy providing system in a compact hundred kW-MW-level SOFC cold and heat power system comprises a cold and heat storage tank, and a domestic hot water system comprises a domestic hot water storage tank and has a cold and heat load adjusting function.
As shown in figure 1, the SOFC power generation system comprises a desulfurization device 1, a reformer 2, a blower 3, an air preheater 4, an electric heating device 5, an SOFC6, a flue gas bypass valve 30 and a post-combustion chamber 10, wherein the SOFC6 comprises an SOFC anode 29 and an SOFC cathode 30, the desulfurization device 1 is communicated with the reformer 2, the reformer 2 is respectively communicated with the air preheater 4 and the SOFC anode 29, the blower 3 is communicated with the air preheater 4, the air preheater 4 is communicated with a waste heat utilization system through a flue gas bypass valve 28, the electric heating device 5 is located on a pipeline between the air preheater 4 and the SOFC cathode 30, and the post-combustion chamber 10 is communicated with the reformer 2. The electric heating device 5 is positioned on the pipeline between the air preheater 4 and the SOFC cathode 30 and used for heating air passing through the pipeline, the electric heating device 5 preheats and keeps warm for the SOFC6 by heating the air passing through the pipeline, the starting time of the battery is shortened, and the starting time of the battery is 10% -50% of the starting time of the SOFC6 in the prior art.
As shown in fig. 1, the compact hundred kW-MW SOFC cooling and heating energy supply system includes an absorption refrigeration device 11, a separator II12, a cold and heat storage tank 13, a valve I14, a mixer I15, a cooling and heating user 16 and a transfer pump 17, wherein an air inlet of the absorption refrigeration device 11 is connected to an air outlet of an air preheater 4, an air outlet of the absorption refrigeration device 11 is connected to a domestic hot water system, an air inlet of the absorption refrigeration device 11 is connected to a deionized water system, an air outlet of the absorption refrigeration device 11 is connected to an air inlet of the cold and heat storage tank 13 and an air inlet of the mixer I15 through a separator I12, an air outlet of the cold and heat storage tank 13 is connected to an air inlet of the mixer I15 through a pipeline provided with a valve I14, an air outlet of the mixer I15 is connected to the cooling and heating user 16, and the cooling and heating user 16. The cold and heat accumulation tank 13 in the cold and warm energy supply system plays a role in storing and adjusting energy, when the energy load is low, the cold and heat accumulation tank 13 plays a role in storing cold supply water or heating water, and when the energy is consistent with high, the cold and heat accumulation tank 13 discharges the stored cold supply water or heating water to play a role in adjusting and relieving energy tension. The absorption type refrigerating device 11 in the cold and warm energy supply system performs refrigerating and heating treatment on deionized water entering the absorption type refrigerating device 11 by using energy provided by the tail gas of the combustion chamber, fully utilizes the waste heat of the tail gas of the combustion chamber of the SOFC power generation system, and improves the comprehensive energy utilization efficiency of the SOFC power generation system.
As shown in fig. 1, the compact hundred kW-MW SOFC cooling and heating system comprises a flue gas hot water heat exchanger 20, a separator III21, a domestic hot water storage tank 22, a valve II23, a mixer II24, a domestic hot water pump 25 and a domestic hot water user 26, wherein an air inlet of the flue gas hot water heat exchanger 20 is connected with an air outlet of an absorption refrigeration device 11, an air inlet of the flue gas hot water heat exchanger 20 is connected with a deionized water system, an air outlet of the flue gas hot water heat exchanger 20 is respectively connected with an air inlet of the domestic hot water storage tank 22 and an air inlet of the mixer II24 through the separator III21, an air outlet of the domestic hot water storage tank 22 is connected with an air inlet of the mixer II24 through a pipeline provided with a valve II25, and an air outlet of the mixer II24 is connected with the domestic. The domestic hot water storage tank 22 in the domestic hot water system plays a role in storing and dispensing domestic hot water, when the domestic hot water load is low, the domestic hot water storage tank 22 stores domestic hot water which is obtained by heat exchange of the flue gas hot water heat exchanger and exceeds the requirement, and when the domestic hot water load is high, the domestic hot water storage tank 22 releases hot ionized water to supply the requirement of the domestic hot water, so that the domestic hot water system plays a role in regulating and relieving the shortage of the domestic hot water requirement. The gas inlet of the flue gas hot water heat exchanger 20 is connected with the gas outlet of the absorption type refrigerating device 11, so that the combustion chamber tail gas utilized by the absorption type refrigerating device 11 enters the flue gas hot water heat exchanger 20, heat energy is provided for deionized water exchanging heat in the flue gas hot water heat exchanger 20, the waste heat of the combustion chamber tail gas of the SOFC power generation system is further utilized, and the comprehensive energy utilization efficiency of the SOFC power generation system is improved.
As shown in figure 1, the compact hundred kW-MW stage SOFC cooling and heating system comprises a deionized water device 18, a separator IV19 and a tap water pump 27, wherein a water inlet of the deionized water device 18 is connected with an external tap water source through the tap water pump 27, and a water outlet of the deionized water device 18 is connected with a water inlet of an absorption refrigeration device (11) and a water inlet of a flue gas hot water heat exchanger (20) through a separator IV (19). The deionized water device 18 in the deionized water system processes tap water into deionized water, and provides deionized water for the cold and warm energy providing system and the domestic hot water system, so that domestic hot water is obtained without secondary heat exchange in the domestic hot water system, the use of secondary heat exchange equipment is reduced, the equipment compactness of the compact hundred-kW-MW-level SOFC cold and hot electrical system is improved, and the investment cost of the compact hundred-kW-MW-level SOFC cold and hot electrical system is reduced. Due to the adoption of the deionized water system, the temperature of the tail gas discharged to the atmosphere at last after the combustion chamber is reduced to 61-65 ℃, and the efficiency of the hundred kW-MW level solid oxide fuel cell system in the compact hundred kW-MW level SOFC cold and hot electric system is improved to 90%.
As shown in figure 1, the SOFC power generation system provides heat for the SOFC power generation system, the cold and heat energy providing system and the domestic hot water system, the heat enters a post combustion chamber 10 through partial SOFC anode 29 outlet gas and is mixed and combusted with SOFC cathode 30 outlet gas, chemical energy of residual fuel is converted into internal energy, the post combustion chamber 10 outlet gas provides heat for a reformer 2 through a reformer 2 in sequence, heat is provided for the air preheater 4 through the air preheater 4, energy is provided for the absorption refrigerating device 11 to refrigerate and heat through the absorption refrigerating device 11, the heat is provided for the softened water exchanging heat in the flue gas hot water heat exchanger 20 through the flue gas hot water heat exchanger 20, the gas at the outlet of the post-combustion chamber 10 passes through the flue gas hot water heat exchanger and then is discharged into the atmosphere, and the temperature of the gas at the outlet of the post-combustion chamber 10 discharged into the atmosphere is 61-65 ℃. The waste heat utilization process reduces the temperature of tail gas discharged to the atmosphere finally after the combustion chamber to 61-65 ℃, and improves the efficiency of a hundred kW-MW level solid oxide fuel cell system in the compact hundred kW-MW level SOFC cold and heat power system to 90%.
Claims (6)
1. The compact hundred-kW-MW-level SOFC (solid oxide fuel cell) cooling and heating system is characterized by comprising an SOFC power generation system, a cooling and heating energy supply system, a domestic hot water system and a deionized water system, wherein the SOFC power generation system supplies heat for the SOFC power generation system, the cooling and heating energy supply system and the domestic hot water system, the deionized water system supplies deionized water for the cooling and heating energy supply system and the domestic hot water system, and the SOFC power generation system, the cooling and heating energy supply system, the domestic hot water system and the deionized water system are sequentially connected through pipelines.
2. The compact hundred kW-MW class SOFC cold thermal electric system of claim 1, characterized in that the SOFC power generation system comprises a desulphurization device (1), a reformer (2), a blower (3), an air preheater (4), an electric heating device (5), an SOFC (6), a flue gas bypass valve (28) and a post-combustion chamber (10), the SOFC (6) comprises an SOFC anode (29) and an SOFC cathode (30), the desulfurizing device (1) is communicated with the reformer (2), the reformer (2) is respectively communicated with the air preheater (4) and the SOFC anode (29), the blower (3) is communicated with the air preheater (4), the air preheater (4) is communicated with a waste heat utilization system through a flue gas bypass valve (28), the electric heating device (5) is positioned on a pipeline between the air preheater (4) and the SOFC cathode (30), and the post-combustion chamber (10) is communicated with the reformer (2).
3. The compact hundred kW-MW stage SOFC thermoelectric system according to claim 2, wherein the cooling and heating energy providing system comprises an absorption refrigerating device (11), a separator II (12), a cold and heat accumulation tank (13), a valve I (14), a mixer I (15), a cooling and heating user (16) and a transfer pump (17), wherein an air inlet of the absorption refrigerating device (11) is connected with an air outlet of the air preheater (4), an air outlet of the absorption refrigerating device (11) is connected with a domestic hot water system, a water inlet of the absorption refrigerating device (11) is connected with a deionized water system, a water outlet of the absorption refrigerating device (11) is respectively connected with a water inlet of the cold and heat accumulation tank (13) and a water inlet of the mixer I (15) through the separator II (12), a water outlet of the cold and heat accumulation tank (13) is connected with the water inlet of the mixer I (15) through a pipeline provided with the valve I (14), the water outlet of the mixer I (15) is connected with a cooling and heating user (16), and the cooling and heating user (16) is connected with a deionized water system through a delivery pump (17).
4. The compact hundred kW-MW class SOFC cold thermal electric system of claim 3, it is characterized in that the domestic hot water system comprises a flue gas hot water heat exchanger (20), a separator III (21), a domestic hot water storage tank (22), a valve II (23), a mixer II (24), a domestic hot water pump (25) and a domestic hot water user (26), the gas inlet of the flue gas hot water heat exchanger (20) is connected with the gas outlet of the absorption type refrigerating device (11), the water inlet of the flue gas hot water heat exchanger (20) is connected with a deionized water system, the water outlet of the flue gas hot water heat exchanger (20) is respectively connected with the water inlet of the domestic hot water storage tank (22) and the water inlet of the mixer II (24) through a separator III (21), the water outlet of the domestic hot water storage tank (22) is connected with the water inlet of the mixer II (24) through a pipeline provided with a valve II (23), and the water outlet of the mixer II (24) is connected with a domestic hot water user (26) through a domestic hot water pump (.
5. The compact hundred kW-MW stage SOFC cold-thermal electric system according to claim 4, wherein the deionized water system comprises a deionized water device (18), a separator IV (19) and a tap water pump (27), wherein a water inlet of the deionized water device (18) is connected with an external tap water source through the tap water pump (27), and a water outlet of the deionized water device (18) is connected with a water inlet of the absorption refrigeration device (11) and a water inlet of the flue gas hot water heat exchanger (20) through the separator IV (19).
6. The compact hundred kW-MW stage SOFC cold and heat electrical system according to claim 5, wherein the SOFC power generation system provides heat for the SOFC power generation system, the cold and heat energy supply system and the domestic hot water system, the heat enters the post combustion chamber (10) through partial SOFC anode (29) outlet gas and is mixed and combusted with the SOFC cathode (30) outlet gas, chemical energy of residual fuel is converted into internal energy, the post combustion chamber (10) outlet gas sequentially passes through the reformer (2) to provide heat for the reformer (2), the air preheater (4) provides heat for the air preheater (4), the absorption type refrigerating device (11) provides energy for refrigeration and heating of the absorption type refrigerating device (11), the flue gas hot water heat exchanger (20) provides heat for softened water exchanging heat in the flue gas hot water heat exchanger (20), and the flue gas hot water heat exchanger exhausts the post combustion chamber (10) outlet gas to the atmosphere, the temperature of the outlet gas of the post combustion chamber (10) which is discharged into the atmosphere is 61-65 ℃.
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| CN110701827A (en) * | 2019-11-05 | 2020-01-17 | 中国华电科工集团有限公司 | Compact hundred kW-MW-level SOFC (solid oxide fuel cell) cold and hot electric system and operation method thereof |
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| CN110701827B (en) * | 2019-11-05 | 2024-04-23 | 中国华电科工集团有限公司 | Compact hundred kW-MW-level SOFC (solid oxide Fuel cell) cold-hot electric system and operation method thereof |
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