CN110985202A - Cold, heat and electricity triple supply system based on low-concentration gas - Google Patents
Cold, heat and electricity triple supply system based on low-concentration gas Download PDFInfo
- Publication number
- CN110985202A CN110985202A CN201911161472.4A CN201911161472A CN110985202A CN 110985202 A CN110985202 A CN 110985202A CN 201911161472 A CN201911161472 A CN 201911161472A CN 110985202 A CN110985202 A CN 110985202A
- Authority
- CN
- China
- Prior art keywords
- gas
- regulating valve
- concentration
- unit
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
- F02B2043/103—Natural gas, e.g. methane or LNG used as a fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a cold, heat and electricity triple supply system based on low-concentration gas, which comprises: the system comprises a gas pump room, a low-concentration gas conveying and guaranteeing unit, a mixer, a gas heat storage and oxidation device, a refrigerating unit, a heating unit and a gas generator set, wherein the low-concentration gas conveying and guaranteeing unit is connected with the gas pump room; the mixer is connected with the low-concentration gas transmission guaranteeing unit and is suitable for mixing part of the gas with the air; the gas heat storage and oxidation device is connected with the mixer and is suitable for carrying out oxidation treatment on the mixed gas so as to obtain high-temperature flue gas and oxidized tail gas; the refrigeration unit is connected with the gas heat storage oxidation device and is suitable for preparing low-temperature water and refrigeration tail gas by utilizing part of high-temperature flue gas; the heating unit is connected with the gas heat storage oxidation device and is suitable for exchanging heat between another part of the high-temperature flue gas and cold water; the gas generator set is connected with the low-concentration gas conveying and guaranteeing unit, is suitable for generating power by burning another part of the gas and generates combustion smoke.
Description
Technical Field
The invention belongs to the technical field of gas utilization, and particularly relates to a cold, heat and electricity triple supply system based on low-concentration gas.
Background
At present, a cold, heat and electricity triple supply scheme based on natural gas is a main distributed energy solution for office buildings, hospitals, hotels, markets and other buildings at present, and the triple supply scheme has a price advantage in areas rich in natural gas compared with pure electricity.
The main technical approach of the cold, heat and electricity triple supply scheme taking natural gas as energy is as follows: the natural gas enters a gas engine, and the gas engine is connected with a generator to generate electric energy to supply power to the outside; the high-temperature flue gas of the gas engine is divided into two parts, one part enters a steam boiler to generate high-temperature steam, and the high-temperature steam is used for heating in winter; one part of the cold water enters a lithium bromide absorption refrigerating unit, and cold water is generated in summer and is used for refrigerating; the scheme utilizes the evacuated high-temperature flue gas for refrigeration and steam generation, reduces the consumption of external electric energy, and can effectively save electric charge.
The existing cold, heat and electricity triple supply based on natural gas has certain advantages compared with pure electricity triple supply in places with rich natural gas resources and low natural gas price, but the natural gas resources in China are deficient at present, the natural gas price in most regions is high, and the natural gas supply is restricted in the natural gas consumption peak. If a common gas boiler is used, the requirement on the concentration of gas is high, the concentration of methane is required to be at least more than 30 mol%, the direct combustion of the gas with the concentration of less than 30 mol% has the risk of explosion, and if the concentration of the gas is less than 5 mol%, the gas cannot be ignited because the concentration of the methane is too low. Therefore, at present, high-concentration gas with the concentration of more than 30 mol% can be directly combusted, 8-20 mol% of gas is used for power generation, gas with the concentration of less than 8 mol% is basically directly discharged, energy is wasted, the environment is polluted, high-temperature tail gas generated by gas power generation at present is directly discharged, and energy of the high-temperature tail gas is wasted.
Therefore, how to effectively utilize the gas with low concentration needs to be further researched and researched.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a cold, hot, and electricity triple supply system based on low-concentration gas, which can use low-concentration gas to replace coal, natural gas, and high-concentration gas, so as to realize cold, hot, and electricity triple supply, thereby solving the problems of coal-fired pollution to the environment and shortage of gas for natural gas and high-concentration gas, and further realizing efficient utilization of low-concentration gas, and avoiding waste of low-concentration gas.
In one aspect of the invention, the invention provides a cold, heat and electricity combined supply system based on low-concentration gas. According to an embodiment of the invention, the system comprises:
a gas pump house adapted to provide gas having a methane concentration of less than 30 mole%;
the low-concentration gas conveying and guaranteeing unit is connected with the gas pump room;
a mixer connected to the low-concentration gas delivery ensuring unit and adapted to mix a part of the gas with air so as to obtain a mixed gas having a methane concentration of not higher than 1.2 mol%;
the gas heat storage and oxidation device is connected with the mixer and is suitable for carrying out oxidation treatment on the mixed gas so as to obtain high-temperature flue gas and oxidized tail gas;
the refrigeration unit is connected with the gas heat storage oxidation device and is suitable for preparing low-temperature water and refrigeration tail gas by utilizing part of the high-temperature flue gas;
the heating unit is connected with the gas heat storage oxidation device and is suitable for exchanging heat with cold water by using another part of the high-temperature flue gas so as to obtain high-temperature steam and heat exchange tail gas;
and the gas generator set is connected with the low-concentration gas conveying and guaranteeing unit, is suitable for burning another part of the gas to generate power and generate combustion smoke.
According to the cold, heat and electricity combined supply system based on the low-concentration gas, a part of the gas provided by the gas pump room and having the methane concentration lower than 30 mol% is supplied to the mixer to be mixed with air after being conveyed by the low-concentration gas conveying and guaranteeing unit, the obtained mixed gas with the methane concentration not higher than 1.2 mol% is supplied to the gas heat storage and oxidation device to be oxidized, a part of the obtained high-temperature flue gas can be supplied to the refrigeration unit to obtain low-temperature water, the low-temperature water can be used for refrigeration of office buildings such as buildings or hospitals, and the other part of the obtained high-temperature flue gas is supplied to the heating unit to generate high-temperature steam which can be used for heating of office buildings such as buildings or hospitals, and the other part of the gas with the methane concentration lower than 30 mol% after being conveyed by the low-concentration gas conveying and guaranteeing unit is supplied to the gas generator unit to generate electricity, the system uses low-concentration gas to replace coal, natural gas and high-concentration gas, realizes cold, heat and electricity triple supply, solves the problems of environmental pollution caused by coal and gas shortage caused by natural gas and high-concentration gas (especially in a gas consumption peak in winter), and can realize efficient utilization of the low-concentration gas and avoid waste of the low-concentration gas.
In addition, the cold, heat and electricity triple supply system based on low-concentration gas according to the above embodiment of the invention may further have the following additional technical features:
in some embodiments of the invention, the refrigeration unit is a lithium bromide refrigeration unit. Therefore, high-efficiency utilization of high-temperature flue gas can be realized.
In some embodiments of the invention, the heating unit is a steam boiler. Therefore, high-efficiency utilization of high-temperature flue gas can be realized.
In some embodiments of the invention, the system further comprises: the fresh air heat exchanger is connected with the gas heat storage and oxidation device and is suitable for exchanging heat with air by using the other part of the high-temperature flue gas so as to obtain hot air; and the fresh air fan is connected with the fresh air heat exchanger and is suitable for mixing the hot air and the cold air for heat exchange and then supplying the mixture to the shaft. Therefore, high-efficiency utilization of high-temperature flue gas can be realized.
In some embodiments of the invention, the gas-fired power generator unit is connected to at least one of the refrigeration unit and the heating unit and is adapted to supply a portion of the combustion flue gas to the refrigeration unit and/or the heating unit for utilization. From this, can realize the high-efficient utilization of system's gas generating set production burning flue gas.
In some embodiments of the invention, the system further comprises: and the hot water heat exchanger is connected with the gas generator set and is suitable for exchanging heat between another part of the combustion flue gas and cold water to generate hot water. From this, can realize the high-efficient utilization of system's gas generating set production burning flue gas.
In some embodiments of the invention, a first regulating valve is arranged between the low-concentration gas transmission guaranteeing unit and the mixer, and a second regulating valve is arranged between the low-concentration gas transmission guaranteeing unit and the gas generator set.
In some embodiments of the invention, the system further comprises: and the intelligent mixing unit is respectively connected with the first regulating valve, the second regulating valve and the methane sensor at the front end of the gas pump room and is suitable for regulating the opening degree of the first regulating valve and the second regulating valve based on the display of the methane sensor. Thus, effective use of low-concentration gas can be achieved.
In some embodiments of the present invention, a third regulating valve is disposed between the refrigeration unit and the gas heat storage and oxidation device, a fourth regulating valve is disposed between the fresh air heat exchanger and the gas heat storage and oxidation device, a fifth regulating valve is disposed between the heating unit and the gas heat storage and oxidation device, a sixth regulating valve is disposed between the gas generator set and the heating unit, a seventh regulating valve is disposed between the gas generator set and the fresh air heat exchanger, and an eighth regulating valve is disposed between the hot water heat exchanger and the gas generator set.
In some embodiments of the invention, the system further comprises: and the intelligent control allocation unit is respectively connected with the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the sixth regulating valve, the seventh regulating valve, the eighth regulating valve, the methane sensor and the power distribution equipment at the rear end of the gas generator set, and is suitable for display based on the methane sensor and power load adjustment of the power distribution equipment, wherein the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the sixth regulating valve, the seventh regulating valve and the opening degree of the eighth regulating valve.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a cold, heat and electricity cogeneration system based on low-concentration gas according to one embodiment of the invention;
fig. 2 is a schematic structural diagram of a cold, heat and electricity cogeneration system based on low-concentration gas according to still another embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the invention, the invention provides a cold, heat and electricity combined supply system based on low-concentration gas. Referring to fig. 1-2, the system includes, according to an embodiment of the invention: the system comprises a gas pump house 100, a low-concentration gas transmission guaranteeing unit 200, a mixer 300, a gas heat storage and oxidation device 400, a refrigeration unit 500, a heating unit 600 and a gas generator set 700.
According to the embodiment of the invention, the gas pump house 100 is suitable for providing gas with methane concentration lower than 30 mol%, preferably 0.6-20 mol%, and the front end of the gas pump house 100 is provided with the methane sensor 11 for monitoring the methane concentration in the gas in real time.
According to the embodiment of the present invention, the low-concentration gas delivery ensuring unit 200 is connected to the gas pump house 100 and is adapted to safely deliver the low-concentration gas. Specifically, the low concentration gas safety transportation guarantee unit comprises tertiary safety protection, is respectively: the explosion-proof valve, the powder injection explosion suppression device and the water seal fire-retardant explosion venting device can guarantee the conveying safety of low-concentration gas, prevent an accidental fire source generated at the rear end from being transmitted into a gas pump room, have the same structure as a low-concentration gas safety conveying guarantee system developed by Chongqing research institute Limited company of the China coal science group, and are not described again.
According to an embodiment of the present invention, the mixer 300 is connected to the low-concentration gas transportation assurance unit 200, and is adapted to mix a portion of the gas with air so as to obtain a mixed gas having a methane concentration of not higher than 1.2 mol%, preferably a concentration of 0.6 to 1.2 mol%, more preferably 1 to 1.2 mol%, so that the obtained mixed gas concentration satisfies an operating methane concentration of a subsequent gas thermal oxidation apparatus.
According to the embodiment of the invention, the gas heat storage and oxidation device 400 is connected with the mixer 300 and is suitable for carrying out oxidation treatment on the mixed gas obtained in the mixing process so as to obtain high-temperature flue gas and oxidized tail gas. Specifically, the working concentration of methane in the gas heat storage and oxidation device is not higher than 1.2 mol%, preferably 0.6-1.2 mol%, more preferably 1-1.2 mol%, the device can safely and stably oxidize the mixed gas with the concentration of methane lower than 1.2 mol% and produce oxidized tail gas and high-temperature flue gas at about 900 ℃, and the obtained oxidized tail gas is directly discharged through a chimney. The inventors found that the problem that the gas having a methane concentration of less than 5 mol% cannot be directly combusted and the problem that the gas is exploded when the methane concentration is 5 to 15 mol% in the prior art can be solved by supplying the mixed gas having a methane concentration of less than 1.2 mol% to the gas heat storage and oxidation device for oxidation, and the problem that the low-concentration gas cannot be used in the prior art can be effectively solved by supplying the low-concentration gas to the mixer and then to the gas heat storage and oxidation device in the present application. It should be noted that, the gas heat accumulation oxidation device in the present application is an existing device, and is not described herein again.
According to the embodiment of the present invention, the refrigeration unit 500 is connected to the gas thermal storage oxidation device 400, and is adapted to use a portion of the high temperature flue gas obtained in the gas thermal storage oxidation device to prepare low temperature water and refrigeration tail gas, the low temperature water can be used for refrigeration of office buildings, and the obtained refrigeration tail gas is discharged through a chimney. Preferably, the refrigeration unit is a lithium bromide refrigeration unit, so that the heat exchange efficiency of high-temperature flue gas is improved.
According to the embodiment of the present invention, the heating unit 600 is connected to the gas thermal storage and oxidation apparatus 400, and is adapted to exchange heat with cold water by using another part of the high temperature flue gas obtained in the gas thermal storage and oxidation apparatus, so as to obtain high temperature steam and heat exchange tail gas, the obtained high temperature steam can be used for heating office buildings, and the obtained heat exchange tail gas is discharged through a chimney. Preferably, the heating unit is a steam boiler, so that the heat exchange efficiency of high-temperature flue gas is improved.
According to an embodiment of the present invention, the gas generator set 700 is connected to the low concentration gas delivery ensuring unit 200, and is adapted to burn a further part of the gas to generate electricity and generate combustion fumes. Specifically, the gas generator set 700 includes the gas engine 71 and the generator 72, a part of gas passing through the low-concentration gas delivery guarantee unit 200 is combusted in the gas engine 71 to do work, and high-temperature flue gas is generated at the same time, and is discharged through the chimney, the gas engine 71 drives the generator 72 to generate electricity, the generated electric energy enters the power distribution equipment and then is delivered to the power load, and meanwhile, the power distribution equipment can also receive the power supply of an external power grid to be used as the supplement and the safe standby power supply of the power load.
According to the cold, heat and electricity combined supply system based on the low-concentration gas, part of the gas provided by the gas pump room and having the methane concentration of less than 30 mol% is supplied to the mixer after being conveyed by the low-concentration gas conveying and guaranteeing unit to be mixed with air, the obtained mixed gas having the methane concentration of less than 1.2 mol% is supplied to the gas heat storage and oxidation device to be oxidized, part of the obtained high-temperature flue gas can be supplied to the refrigeration unit to obtain low-temperature water, the low-temperature water can be used for refrigeration of buildings, hospitals and other office buildings, and the other part of the obtained high-temperature flue gas is supplied to the heating unit to generate high-temperature steam which can be used for heating of buildings, hospitals and other office buildings, and meanwhile, the other part of the gas having the methane concentration of less than 30 mol% and conveyed by the low-concentration gas conveying and guaranteeing unit is supplied to the gas generator unit to generate electricity, the system uses low-concentration gas to replace coal, natural gas and high-concentration gas, realizes cold, heat and electricity triple supply, solves the problems of environmental pollution caused by coal and gas shortage caused by natural gas and high-concentration gas (especially in a gas consumption peak in winter), and can realize efficient utilization of the low-concentration gas and avoid waste of the low-concentration gas.
Further, in order to achieve maximum utilization of high-temperature flue gas in the gas heat storage and oxidation device, referring to fig. 2, the cold, heat and electricity triple supply system based on low-concentration gas further includes a fresh air heat exchanger 800 and a fresh air fan 900.
According to the embodiment of the present invention, the fresh air heat exchanger 800 is connected to the gas heat storage and oxidation device 200, and is adapted to exchange heat with air by using another part of the high temperature flue gas obtained from the gas heat storage and oxidation device 200, so as to obtain hot air. It should be noted that, a person skilled in the art can adjust the temperature of the hot air according to actual needs, as long as the hot air can be mixed with cold air subsequently to meet the heating needs of the shaft.
According to the embodiment of the present invention, the fresh air fan 900 is connected to the fresh air heat exchanger 800, and is adapted to exchange heat between the hot air and the cold air obtained by the fresh air heat exchanger, and then supply the mixture to the shaft. Specifically, in northern coal mines, a shaft needs to be heated and prevented from freezing in winter, the heat demand is very high, the shaft is heated by high-temperature gas generated by a coal-fired hot air furnace in the traditional method and is limited by environmental protection, the coal-fired hot air furnace is basically replaced by a natural gas furnace or a gas furnace at present, hot air obtained by supplying high-temperature flue gas after low-concentration gas is oxidized to a fresh air heat exchanger is mixed with cold air of a fresh air fan and then supplied to the shaft for underground heating, the environmental protection problem generated by the traditional method can be fundamentally solved, and the resource utilization of the low-concentration gas is realized. It should be noted that, a person skilled in the art can select a mixing ratio of the hot air and the cold air supplied by the fresh air blower according to actual needs as long as the mixing ratio can meet actual needs of the shaft.
Further, referring to fig. 2, in order to realize resource utilization of the combustion flue gas obtained by the gas generator set, the gas generator set 700 is connected to at least one of the refrigeration unit 500 and the heating unit 600, and is adapted to supply a part of the combustion flue gas obtained by the gas generator set 700 to the refrigeration unit 500 and/or the heating unit 600 for utilization, so as to realize efficient utilization of waste heat of the combustion flue gas, thereby improving maximum utilization of the low-concentration gas.
Further, referring to fig. 2, the above-mentioned cold, heat, electricity triple supply system based on low concentration gas further includes: the hot water heat exchanger 1000 and the hot water heat exchanger 1000 are connected with the gas generator set 700, and are suitable for generating hot water by exchanging heat between a part of the combustion flue gas obtained by the gas generator set 700 and cold water, and the part of the hot water can be used as domestic hot water, such as bathing and the like. It should be noted that, a person skilled in the art can select the obtained hot water temperature according to actual needs, and details are not described herein.
Further, referring to fig. 1-2, the aforementioned cold, heat, and electricity triple supply system based on low-concentration gas further includes an intelligent mixing unit 1100, a first regulating valve 31 is disposed between the low-concentration gas delivery guarantee unit 200 and the mixer 300, a second regulating valve 73 is disposed between the low-concentration gas delivery guarantee unit 200 and the gas generator set 700, and the intelligent mixing unit 1100 is respectively connected to the first regulating valve 31, the second regulating valve 73, and a methane sensor 11 at the front end of the gas pump room 100, and is adapted to adjust the opening degrees of the first regulating valve 31 and the second regulating valve 73 based on the display of the methane sensor 11. Specifically, the gas heat storage and oxidation device requires that the concentration of methane in mixed gas is not higher than 1.2 mol%, the concentration of methane in gas before mixing fluctuates below 30 mol%, especially when underground extraction is abnormal, the change of the concentration of methane in gas before mixing is severe, if no intelligent mixing unit is provided, the concentration of mixed gas exceeds 1.2 mol% at any time, the intelligent mixing unit monitors the concentration of methane in gas in advance by installing a methane sensor at the front end of a gas pump room, sends an instruction to the first regulating valve in advance, adjusts the opening degrees of the first regulating valve and the second regulating valve in advance, adjusts the gas amount entering the mixer and the gas generator set, and finally keeps the concentration of mixed gas methane not higher than 1.2%. It should be noted that the intelligent mixing and blending unit is any device capable of implementing the above functions in the prior art, and is not described herein again.
Further, referring to fig. 1-2, the aforementioned cold, heat, and electricity triple co-generation system based on low-concentration gas further includes an intelligent control allocation unit 1200, a third adjusting valve 51 is disposed between the refrigeration unit 500 and the gas thermal storage oxidation apparatus 400, a fourth adjusting valve 81 is disposed between the fresh air heat exchanger 800 and the gas thermal storage oxidation apparatus 400, a fifth adjusting valve 61 is disposed between the heating unit 600 and the gas thermal storage oxidation apparatus 400, a sixth adjusting valve 74 is disposed between the gas generator set 700 and the heating unit 600, a seventh adjusting valve 75 is disposed between the gas generator set 700 and the fresh air heat exchanger 800, an eighth adjusting valve 76 is disposed between the hot water heat exchanger 1000 and the gas generator set 700, and the intelligent control allocation unit 1200 is respectively connected to the first adjusting valve 31, the second adjusting valve 73, the third adjusting valve 51, the fourth adjusting valve 81, the fifth adjusting valve 61, the sixth adjusting valve 74, the seventh adjusting valve, The eighth regulating valve 76, the methane sensor 11, and the power distribution equipment 77 at the rear end of the gas turbine generator set 700 are connected, and are adapted to regulate the opening degrees of the first regulating valve 31, the second regulating valve 73, the third regulating valve 51, the fourth regulating valve 81, the fifth regulating valve 61, the sixth regulating valve 74, the seventh regulating valve 75, and the eighth regulating valve 76 based on the display of the methane sensor 11 and the electrical load of the power distribution equipment. The specific control and blending is as follows: and adjusting the second adjusting valve and the first adjusting valve according to the methane concentration, the electric load, the environmental temperature and the like of the gas so as to adjust the gas quantity entering the gas generator set and the gas heat storage and oxidation device. For example, at night, office staff are reduced, the electric load is low, the ambient temperature is reduced, the heating load of the air shaft is increased, the opening degree of the first regulating valve is automatically increased by the system, the gas amount entering the thermal storage oxidation device is increased, and the opening degree of the second regulating valve is reduced. Meanwhile, the opening degree of the eighth regulating valve is reduced, the domestic hot water supply is reduced, the opening degree of the sixth regulating valve is reduced, so that heating is reduced, the opening degree of the seventh regulating valve is increased, more high-temperature flue gas of the gas generator set enters the fresh air heat exchanger, the opening degree of the fifth regulating valve is also reduced, and the opening degree of the fourth regulating valve is increased to increase the amount of the flue gas entering the fresh air heat exchanger. And meanwhile, the load of an external power grid is reduced, and the consumption of the external power grid is reduced. It should be noted that the intelligent control allocating unit is any device capable of implementing the above functions in the prior art, and is not described herein again.
The cold, heat and electricity combined supply system based on the low-concentration gas has one of the following technical effects:
(1) in the prior art, coal, natural gas and high-concentration gas are used as primary energy to realize combined supply of cold, heat and electricity. The coal-fired method for realizing shaft heating and heating is limited in the northern heating season at present and is forcibly eliminated due to the environmental protection. The use of natural gas as a primary energy source is mainly expensive, and during the peak of gas consumption in winter, the natural gas is not supplied enough and may be out of gas. When high-concentration gas is used as primary energy, the concentration of methane must be ensured, and generally, when the concentration is lower than 30 mol%, higher risk exists. Because the explosion limit of methane is 5-15 mol%. Therefore, the high-concentration gas is generally burnt directly at a concentration of 30 mol% or more. The invention adopts low-concentration gas with methane less than 30 mol% to replace coal, natural gas and high-concentration gas, and the low-concentration gas is used as primary energy to realize triple co-generation. The utilization of the low-concentration gas exhausted in the past reduces the consumption of the traditional primary energy, saves the energy expenditure of a coal mine, and reduces the emission of the gas. When the concentration of the gas is 8-20 mol%, the gas can be used for a heat storage oxidation device and can also enter a gas generator set; when the gas concentration is less than 8 mol% (more than 0.6 mol%), the system cannot generate electricity by combustion, but can store heat and oxidize, so that almost all the low-concentration gas can be used by the system.
(2) The prior art only adopts a combustion device to generate heat energy and electric energy. The invention adopts two energy conversion devices, namely a heat storage oxidation device and a gas generator set, and can adjust the heat loads of the two devices according to the change of the environmental temperature, thereby realizing the minimum consumption of low-concentration gas.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A cold, heat, electricity trigeminy supplies system based on low concentration gas, its characterized in that includes:
a gas pump house adapted to provide gas having a methane concentration of less than 30 mole%;
the low-concentration gas conveying and guaranteeing unit is connected with the gas pump room;
a mixer connected to the low-concentration gas delivery ensuring unit and adapted to mix a part of the gas with air so as to obtain a mixed gas having a methane concentration of not higher than 1.2 mol%;
the gas heat storage and oxidation device is connected with the mixer and is suitable for carrying out oxidation treatment on the mixed gas so as to obtain high-temperature flue gas and oxidized tail gas;
the refrigeration unit is connected with the gas heat storage oxidation device and is suitable for preparing low-temperature water and refrigeration tail gas by utilizing part of the high-temperature flue gas;
the heating unit is connected with the gas heat storage oxidation device and is suitable for exchanging heat with cold water by using another part of the high-temperature flue gas so as to obtain high-temperature steam and heat exchange tail gas;
and the gas generator set is connected with the low-concentration gas conveying and guaranteeing unit, is suitable for burning another part of the gas to generate power and generate combustion smoke.
2. The system of claim 1, wherein the refrigeration unit is a lithium bromide refrigeration unit.
3. The system of claim 1 or 2, wherein the heating unit is a steam boiler.
4. The system of claim 1, further comprising:
the fresh air heat exchanger is connected with the gas heat storage and oxidation device and is suitable for exchanging heat with air by using the other part of the high-temperature flue gas so as to obtain hot air;
and the fresh air fan is connected with the fresh air heat exchanger and is suitable for mixing the hot air and the cold air for heat exchange and then supplying the mixture to the shaft.
5. The system of claim 4, wherein the gas-fired power generator unit is coupled to at least one of the refrigeration unit and the heating unit and is adapted to supply a portion of the combustion flue gas to the refrigeration unit and/or the heating unit for utilization.
6. The system of claim 5, further comprising:
and the hot water heat exchanger is connected with the gas generator set and is suitable for exchanging heat between another part of the combustion flue gas and cold water to generate hot water.
7. The system of claim 6, wherein a first regulating valve is arranged between the low-concentration gas transmission and guarantee unit and the mixer, and a second regulating valve is arranged between the low-concentration gas transmission and guarantee unit and the gas generator set.
8. The system of claim 7, further comprising:
and the intelligent mixing unit is respectively connected with the first regulating valve, the second regulating valve and the methane sensor at the front end of the gas pump room and is suitable for regulating the opening degree of the first regulating valve and the second regulating valve based on the display of the methane sensor.
9. The system of claim 8, wherein a third regulating valve is arranged between the refrigerating unit and the gas heat storage and oxidation device, a fourth regulating valve is arranged between the fresh air heat exchanger and the gas heat storage and oxidation device, a fifth regulating valve is arranged between the heating unit and the gas heat storage and oxidation device, a sixth regulating valve is arranged between the gas generator set and the heating unit, a seventh regulating valve is arranged between the gas generator set and the fresh air heat exchanger, and an eighth regulating valve is arranged between the hot water heat exchanger and the gas generator set.
10. The system of claim 9, further comprising:
and the intelligent control allocation unit is respectively connected with the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the sixth regulating valve, the seventh regulating valve, the eighth regulating valve, the methane sensor and the power distribution equipment at the rear end of the gas generator set, and is suitable for display based on the methane sensor and power load adjustment of the power distribution equipment, wherein the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the sixth regulating valve, the seventh regulating valve and the opening degree of the eighth regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161472.4A CN110985202A (en) | 2019-11-24 | 2019-11-24 | Cold, heat and electricity triple supply system based on low-concentration gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161472.4A CN110985202A (en) | 2019-11-24 | 2019-11-24 | Cold, heat and electricity triple supply system based on low-concentration gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110985202A true CN110985202A (en) | 2020-04-10 |
Family
ID=70086203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911161472.4A Pending CN110985202A (en) | 2019-11-24 | 2019-11-24 | Cold, heat and electricity triple supply system based on low-concentration gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110985202A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459929A (en) * | 2020-12-14 | 2021-03-09 | 湖南省力宇燃气动力有限公司 | Air supply system of low-concentration gas engine |
| CN113188360A (en) * | 2021-05-25 | 2021-07-30 | 中煤科工集团重庆研究院有限公司 | Multifunctional molten salt heat storage and supply method and system based on gas heat storage oxidation, power generation waste heat and valley electricity |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201007231Y (en) * | 2006-12-15 | 2008-01-16 | 朱晓彦 | Mine total energy approach device of coal mine mash gas engines |
| CN102562131A (en) * | 2010-12-24 | 2012-07-11 | 上海攀极投资有限公司 | Coal mine gas comprehensive application system and application method thereof |
| CN102720527A (en) * | 2012-06-28 | 2012-10-10 | 中煤科工集团重庆研究院 | Multi-bed type ventilation air methane regenerative thermal oxidation device |
| CN103016202A (en) * | 2012-12-20 | 2013-04-03 | 湖南宜化化工有限责任公司 | Method for generating electricity by using coal mine low-concentration gas |
| CN103277130A (en) * | 2013-05-24 | 2013-09-04 | 中国矿业大学 | Mine area distribution type poly-generation energy supplying system with coal mine gas emission close to zero |
| CN203655468U (en) * | 2014-01-20 | 2014-06-18 | 湖南科技大学 | Low-concentration coal-mine gas comprehensive utilization and emission reduction system |
| CN104295364A (en) * | 2014-10-15 | 2015-01-21 | 太原理工大学 | Coal seam gas based residual heat resource distributed energy system |
| CN104421044A (en) * | 2013-09-03 | 2015-03-18 | 毛如麟 | Efficient electricity, heat and cooling tri-generation supply system |
| CN204225938U (en) * | 2014-11-26 | 2015-03-25 | 中煤科工集团重庆研究院有限公司 | Low concentration gas regenerative oxidation cooling heating and power generation system |
| CN204592867U (en) * | 2015-04-09 | 2015-08-26 | 煤炭工业太原设计研究院 | Low-concentration gas power generation system |
| CN204923561U (en) * | 2015-08-05 | 2015-12-30 | 北京燃气能源发展有限公司 | Gas cool and thermal power trigeminy supplies system and liquefied natural gas refrigerating system coupling energy supply system |
| CN205026395U (en) * | 2015-10-12 | 2016-02-10 | 宁波鲍斯能源装备股份有限公司 | Low concentration gas distributing device for |
| CN105381694A (en) * | 2015-12-07 | 2016-03-09 | 兴边富民（北京）清洁能源技术有限公司 | Blending and treating system for ventilation air methane and drainage methane in coal mine |
| CN106545876A (en) * | 2017-01-13 | 2017-03-29 | 中煤科工集团重庆研究院有限公司 | Flue gas wellbore method after a kind of gas regenerative oxidation |
| CN107461276A (en) * | 2017-07-26 | 2017-12-12 | 中国科学院理化技术研究所 | A kind of small distributed cooling heating and power generation system |
| CN206942881U (en) * | 2017-04-13 | 2018-01-30 | 中煤科工集团重庆研究院有限公司 | Low-concentration gas power generation system |
| CN110145408A (en) * | 2019-05-28 | 2019-08-20 | 浙江亿扬能源科技有限公司 | A kind of synthesis energy supplying system and its operation method recycling wide concentration gas for coal mine |
| CN110174021A (en) * | 2019-05-28 | 2019-08-27 | 浙江亿扬能源科技有限公司 | A kind of waste heat comprehensive utilization system and operation method for realizing the drying of coal mine wet stock using low concentration gas |
| CN209654075U (en) * | 2019-02-02 | 2019-11-19 | 浙江亿扬能源科技有限公司 | A kind of coal mine gas utilization system |
| CN209801855U (en) * | 2019-04-15 | 2019-12-17 | 沈阳工业大学 | Triple co-generation system based on biomass Stirling lithium bromide unit |
-
2019
- 2019-11-24 CN CN201911161472.4A patent/CN110985202A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201007231Y (en) * | 2006-12-15 | 2008-01-16 | 朱晓彦 | Mine total energy approach device of coal mine mash gas engines |
| CN102562131A (en) * | 2010-12-24 | 2012-07-11 | 上海攀极投资有限公司 | Coal mine gas comprehensive application system and application method thereof |
| CN102720527A (en) * | 2012-06-28 | 2012-10-10 | 中煤科工集团重庆研究院 | Multi-bed type ventilation air methane regenerative thermal oxidation device |
| CN103016202A (en) * | 2012-12-20 | 2013-04-03 | 湖南宜化化工有限责任公司 | Method for generating electricity by using coal mine low-concentration gas |
| CN103277130A (en) * | 2013-05-24 | 2013-09-04 | 中国矿业大学 | Mine area distribution type poly-generation energy supplying system with coal mine gas emission close to zero |
| CN104421044A (en) * | 2013-09-03 | 2015-03-18 | 毛如麟 | Efficient electricity, heat and cooling tri-generation supply system |
| CN203655468U (en) * | 2014-01-20 | 2014-06-18 | 湖南科技大学 | Low-concentration coal-mine gas comprehensive utilization and emission reduction system |
| CN104295364A (en) * | 2014-10-15 | 2015-01-21 | 太原理工大学 | Coal seam gas based residual heat resource distributed energy system |
| CN204225938U (en) * | 2014-11-26 | 2015-03-25 | 中煤科工集团重庆研究院有限公司 | Low concentration gas regenerative oxidation cooling heating and power generation system |
| CN204592867U (en) * | 2015-04-09 | 2015-08-26 | 煤炭工业太原设计研究院 | Low-concentration gas power generation system |
| CN204923561U (en) * | 2015-08-05 | 2015-12-30 | 北京燃气能源发展有限公司 | Gas cool and thermal power trigeminy supplies system and liquefied natural gas refrigerating system coupling energy supply system |
| CN205026395U (en) * | 2015-10-12 | 2016-02-10 | 宁波鲍斯能源装备股份有限公司 | Low concentration gas distributing device for |
| CN105381694A (en) * | 2015-12-07 | 2016-03-09 | 兴边富民（北京）清洁能源技术有限公司 | Blending and treating system for ventilation air methane and drainage methane in coal mine |
| CN106545876A (en) * | 2017-01-13 | 2017-03-29 | 中煤科工集团重庆研究院有限公司 | Flue gas wellbore method after a kind of gas regenerative oxidation |
| CN206942881U (en) * | 2017-04-13 | 2018-01-30 | 中煤科工集团重庆研究院有限公司 | Low-concentration gas power generation system |
| CN107461276A (en) * | 2017-07-26 | 2017-12-12 | 中国科学院理化技术研究所 | A kind of small distributed cooling heating and power generation system |
| CN209654075U (en) * | 2019-02-02 | 2019-11-19 | 浙江亿扬能源科技有限公司 | A kind of coal mine gas utilization system |
| CN209801855U (en) * | 2019-04-15 | 2019-12-17 | 沈阳工业大学 | Triple co-generation system based on biomass Stirling lithium bromide unit |
| CN110145408A (en) * | 2019-05-28 | 2019-08-20 | 浙江亿扬能源科技有限公司 | A kind of synthesis energy supplying system and its operation method recycling wide concentration gas for coal mine |
| CN110174021A (en) * | 2019-05-28 | 2019-08-27 | 浙江亿扬能源科技有限公司 | A kind of waste heat comprehensive utilization system and operation method for realizing the drying of coal mine wet stock using low concentration gas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459929A (en) * | 2020-12-14 | 2021-03-09 | 湖南省力宇燃气动力有限公司 | Air supply system of low-concentration gas engine |
| CN112459929B (en) * | 2020-12-14 | 2022-03-18 | 湖南省力宇燃气动力有限公司 | Air supply system of low-concentration gas engine |
| CN113188360A (en) * | 2021-05-25 | 2021-07-30 | 中煤科工集团重庆研究院有限公司 | Multifunctional molten salt heat storage and supply method and system based on gas heat storage oxidation, power generation waste heat and valley electricity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200294780A1 (en) | Combined heating and power modules and devices | |
| CN102353096A (en) | Wall furnace with generating set | |
| CN105020937A (en) | Distributed energy supply system applied to hospital | |
| CN110985202A (en) | Cold, heat and electricity triple supply system based on low-concentration gas | |
| CN111121067A (en) | Method for utilizing low-concentration gas | |
| EP1946008B1 (en) | Device for heating, generating electric power, and cooling enclosed spaces | |
| US20210257959A1 (en) | Combined heating and power modules and devices | |
| WO2020185944A1 (en) | Combined heating and power modules and devices | |
| CN201377888Y (en) | Biogas heating stove | |
| US10170780B2 (en) | Furnace with an integrated flame assisted fuel cell for combined heating and power | |
| US20210351722A1 (en) | Combined heating and power modules and devices | |
| US20210257958A1 (en) | Combined heating and power modules and devices | |
| CN205245604U (en) | Distributing type energy is supplied with system for hospital | |
| CN207880864U (en) | A kind of oxygen-enriched combusting energy-saving and emission-reduction system | |
| CN208445292U (en) | A kind of garden grade comprehensive energy power supply device | |
| CN105757763A (en) | Compound clean energy centralized energy supply, domestic hot water supply and power supply system | |
| CN207880863U (en) | A kind of oxygen-enriched combusting depth peak regulation and energy-saving and emission-reduction integrated system | |
| CN209801433U (en) | steam generator | |
| CN205579988U (en) | Photovoltaic and complementary electromagnetic heating pot furnace system of commercial power | |
| CN110173371B (en) | Distributed energy system of natural gas internal combustion engine with high-efficiency operation and operation method | |
| CN205825195U (en) | A kind of combustion gas combined supply system and air source heat pump system energy supply association system | |
| CN220285876U (en) | Multi-energy complementary distributed energy system | |
| CN220958974U (en) | Cold-heat exchange system | |
| CN108302548A (en) | A kind of oxygen-enriched combusting energy-saving and emission-reduction system and method | |
| CN212054807U (en) | Coal mine shaft anti-freezing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200410 |
|
| RJ01 | Rejection of invention patent application after publication |