CN216080468U - Cold and electricity combined supply device driven by low-temperature flue gas waste heat in metallurgical furnace - Google Patents
Cold and electricity combined supply device driven by low-temperature flue gas waste heat in metallurgical furnace Download PDFInfo
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- 239000002918 waste heat Substances 0.000 title claims abstract description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000003546 flue gas Substances 0.000 title claims abstract description 48
- 230000005611 electricity Effects 0.000 title claims description 6
- 238000005057 refrigeration Methods 0.000 claims abstract description 55
- 238000010248 power generation Methods 0.000 claims abstract description 42
- 239000000779 smoke Substances 0.000 claims abstract description 29
- 238000005338 heat storage Methods 0.000 claims abstract description 23
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 18
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 56
- 238000003786 synthesis reaction Methods 0.000 claims description 56
- 239000003507 refrigerant Substances 0.000 claims description 42
- 238000004321 preservation Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 238000003723 Smelting Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 6
- 238000004064 recycling Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009867 copper metallurgy Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The utility model relates to a cold-electricity combined supply device driven by low-temperature flue gas waste heat in a metallurgical furnace, belonging to the technical field of waste heat utilization of metallurgical furnaces. The device comprises a heat storage subsystem, a refrigeration subsystem and a power generation subsystem, wherein the heat storage subsystem comprises a gravity type high-temperature heat pipe heat exchanger, a high-temperature synthetic heat conduction oil heater and a high-temperature synthetic heat conduction oil heat accumulator which are sequentially communicated, the refrigeration subsystem and the power generation subsystem exchange heat with the high-temperature synthetic heat conduction oil heat accumulator, the high-temperature synthetic heat conduction oil heat accumulator transmits stored heat to the refrigeration subsystem and the power generation subsystem for operation by taking low-temperature waste heat in smoke exhaust of the nonferrous metal smelting furnace as a heat source. In summer, the refrigeration subsystem takes high-temperature synthetic heat-conducting oil as a heat storage working medium and utilizes a lithium bromide (LiBr) absorption type refrigerating unit for refrigeration; in non-summer time, the power generation subsystem uses high-temperature synthetic heat conduction oil as a heat storage working medium to generate power, and full utilization of waste heat of medium-low temperature flue gas and combined supply of cold and power are realized.
Description
Technical Field
The utility model relates to a cold-electricity combined supply device driven by low-temperature flue gas waste heat in a metallurgical furnace, belonging to the technical field of waste heat utilization of metallurgical furnaces.
Background
In the residual heat of the flue gas in the nonferrous metallurgy industry, the residual heat of the high-temperature flue gas with the temperature higher than 1000 ℃ accounts for 52 percent of the total residual heat of the flue gas, the residual heat of the medium-temperature flue gas with the temperature between 600 ℃ and 1000 ℃ accounts for 26 percent of the total residual heat of the flue gas, and the residual heat of the low-temperature flue gas with the temperature lower than 600 ℃ accounts for 22 percent of the total residual heat of the flue gas. In the aspect of waste heat resource recycling, the traditional turbine flue gas waste heat recycling system based on a heat pipe steam generator and a steam-water mixed heater, a collaborative optimization scheme of energy conversion and denitration at the cold end of a boiler of a thermal power plant, a novel hybrid enhanced high-temperature heat exchanger based on a cascade recycling method, a high-temperature dust removal and heat exchange integrated device and the like are adopted. However, the research on high-temperature waste heat is focused, and the attention on low-temperature waste heat is less. Taking an Isa furnace in the copper metallurgy process as an example, the high-temperature flue gas waste heat is efficiently recovered through a waste heat boiler; the temperature field is not stable enough due to the relatively low temperature of the waste heat of the medium-low temperature flue gas, so that the reasonable and effective utilization is not formed at present.
According to the characteristics of energy transfer or conversion in the utilization process of waste heat resources, industrial waste heat utilization technologies are divided into a heat exchange technology, a heat-power conversion technology and a waste heat refrigeration technology. With the continuous development of metallurgy energy-saving technology in China, the recycling of various high-quality waste heat resources is realized by utilizing the partial technologies. However, the medium-low temperature waste heat resources in the non-ferrous metal smelting process do not meet the utilization requirement of 'heat is used up', and the organic combination and advantage complementation between different waste heat utilization technologies cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cold-electricity combined supply device driven by low-temperature flue gas waste heat in a metallurgical furnace, aiming at the problem of utilization of the low-temperature flue gas waste heat in the metallurgical furnace, wherein the low-temperature flue gas waste heat in the metallurgical furnace is fully recycled by utilizing a heat storage subsystem, a refrigeration subsystem and a power generation subsystem, and the low-temperature flue gas waste heat in a nonferrous metal smelting furnace is recycled by two ways of waste heat refrigeration and waste heat power generation, namely, the air-conditioning refrigeration in production and life in summer (7 and 8 months) is replaced by the waste heat refrigeration; electricity is generated through waste heat, and electric energy is supplied to an electric appliance; the problem of low-temperature flue gas waste heat utilization ratio in the field of non-ferrous metal smelting at present is solved, and energy-saving and environment-friendly benefits are remarkable.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
a combined cooling and power supply device driven by low-temperature flue gas waste heat in a metallurgical furnace comprises a smoke exhaust pipeline 1, a heat storage subsystem, a refrigeration subsystem and a power generation subsystem;
the inlet of the smoke exhaust pipeline 1 is communicated with the smoke outlet of the metallurgical furnace kiln, and the outlet of the smoke exhaust pipeline 1 is externally connected with a smoke collecting device;
the heat storage subsystem comprises a gravity type high-temperature heat pipe heat exchanger 2, a high-temperature synthesis heat conduction oil heater 3 and a high-temperature synthesis heat conduction oil heat accumulator 5, the top of the gravity type high-temperature heat pipe heat exchanger 2 is arranged in the smoke exhaust pipeline 1, the bottom of the gravity type high-temperature heat pipe heat exchanger 2 is arranged in the high-temperature synthesis heat conduction oil heater 3, and a hot oil outlet of the high-temperature synthesis heat conduction oil heater 3 is communicated with the high-temperature synthesis heat conduction oil heat accumulator 5;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline I of the refrigeration subsystem, a working medium outlet of the heat exchange working medium pipeline I of the refrigeration subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3, a water-cooled air conditioner or a central air conditioner is communicated with a medium inlet of a heat exchange working medium pipeline II of the refrigeration subsystem through a cold medium water or cold air pipeline I, and a medium outlet of the heat exchange working medium pipeline II of the refrigeration subsystem is communicated with the water-cooled air conditioner or the central air conditioner through a cold medium water or cold air pipeline II;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline III of the power generation subsystem, a working medium outlet of the heat exchange working medium pipeline III of the power generation subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3, and the power generation subsystem is electrically connected with an electric appliance;
the outer side of the gravity type high-temperature heat pipe exchanger 2 between the high-temperature synthesis heat conduction oil heater 3 and the smoke exhaust pipeline 1 is coated with a heat preservation layer I, the outer side of the high-temperature synthesis heat conduction oil heater 3 is coated with a heat preservation layer II, and the outer side of the high-temperature synthesis heat conduction oil heat accumulator 5 is coated with a heat preservation layer III;
further, the thickness of the heat insulation layer I is 20-40 mm, the thickness of the heat insulation layer II is 30-50 mm, and the thickness of the heat insulation layer III is 30-50 mm;
the power generation subsystem comprises a direct contact type evaporator 7 and an organic Rankine cycle generator set 8, a heat exchange working medium pipeline III is arranged in the direct contact type evaporator 7 and is in contact with a refrigerant heat exchange pipe of the direct contact type evaporator 7, a refrigerant outlet of the refrigerant heat exchange pipe is communicated with a refrigerant steam inlet of the organic Rankine cycle generator set 8 through a refrigerant conveying pipeline I, and a refrigerant outlet of the organic Rankine cycle generator set 8 is communicated with a refrigerant inlet of the direct contact type evaporator 7 through a refrigerant conveying pipeline II;
the refrigeration subsystem is a lithium bromide absorption refrigeration unit 6;
further, a hot oil outlet of the high-temperature synthesis heat conduction oil heater 3 is communicated with the high-temperature synthesis heat conduction oil heat accumulator 5 through a first working medium conveying pipe;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline I of the refrigeration subsystem through a second working medium conveying pipe, and a working medium outlet of the heat exchange working medium pipeline I of the refrigeration subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3 through a third working medium conveying pipe;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline III of the power generation subsystem through a fourth working medium conveying pipe, and a working medium outlet of the heat exchange working medium pipeline III of the power generation subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3 through a fifth working medium conveying pipe;
circulating pumps 4 are arranged on the first working medium conveying pipe, the second working medium conveying pipe, the third working medium conveying pipe, the fourth working medium conveying pipe, the fifth working medium conveying pipe and the refrigerant conveying pipeline II;
preferably, the high-temperature synthesis heat conduction oil is
66, the liquid state can bear the temperature of minus 7 to 350 ℃.
The use method of the cold-electricity combined supply device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln comprises the following specific steps:
the gravity type high-temperature heat pipe heat exchanger receives heat from a smoke exhaust pipeline and transfers the heat to a high-temperature synthetic heat conduction oil heater, and then a circulating pump conveys the heated high-temperature synthetic heat conduction oil to a high-temperature synthetic heat conduction oil heat accumulator;
the lithium bromide absorption type refrigerating unit receives heat brought by high-temperature synthetic heat conduction oil from the high-temperature synthetic heat conduction oil heat accumulator to drive the unit to run, and the high-temperature synthetic heat conduction oil cooled in the lithium bromide absorption type refrigerating unit is conveyed back to the forming heat conduction oil heater by the circulating pump;
the direct contact type evaporator receives the high-temperature synthetic heat conduction oil conveyed by the high-temperature synthetic heat conduction oil heat accumulator to heat a refrigerant (preferably HCFC-123), the refrigerant is heated and evaporated to become high-temperature high-pressure steam, the high-temperature high-pressure steam enters an organic Rankine cycle unit to drive a steam turbine to generate electricity, and the cooled refrigerant is conveyed back to the direct contact type evaporator by a circulating pump for cyclic utilization; the high-temperature synthetic heat conduction oil cooled in the direct contact type evaporator is conveyed back to the high-temperature synthetic heat conduction oil heater by the circulating pump;
the method comprises the following steps that low-temperature waste heat in discharged smoke of a nonferrous metal smelting furnace is used as a heat source, and the stored heat is transmitted to a refrigeration subsystem and a power generation subsystem by a high-temperature synthetic heat conduction oil heat accumulator for operation; in summer, the refrigeration subsystem takes high-temperature synthetic heat-conducting oil as a heat storage working medium, and utilizes a lithium bromide (LiBr) absorption refrigeration unit for refrigeration for life use in a plant area; in non-summer, the power generation subsystem takes high-temperature synthesized heat conduction oil as a heat storage working medium, takes dichlorotrifluoroethane (HCFC-123) as a refrigerant, and generates power through an organic Rankine cycle for the production and living needs of a plant area; the full utilization of the waste heat of the medium-low temperature flue gas is realized, and the combined supply of cold and power is carried out in a plant.
The utility model has the beneficial effects that:
(1) the utility model fully recycles the middle-low temperature flue gas waste heat based on the heat storage subsystem, the refrigeration subsystem and the power generation subsystem, can solve the problem of low temperature flue gas waste heat utilization rate in the field of non-ferrous metal smelting at present, and has obvious energy-saving and environment-friendly benefits;
(2) the utility model fully recycles the waste heat of middle-low temperature flue gas based on a heat storage subsystem, a refrigeration subsystem and a power generation subsystem, and a synthetic heat conduction oil heat accumulator is arranged in the heat storage subsystem to change an unstable flue gas heat source into a stable heat source;
(3) the utility model fully recycles the waste heat of middle-low temperature flue gas based on the heat storage subsystem, the refrigeration subsystem and the power generation subsystem, and introduces a high-temperature synthetic heat conduction oil-HCFC-123 direct contact evaporator into the power generation subsystem, thereby improving the heat exchange efficiency of organic working media and synthetic heat conduction oil;
(4) the utility model fully recycles the waste heat of middle-low temperature flue gas based on the heat storage subsystem, the refrigeration subsystem and the power generation subsystem, has no pollution caused by a refrigerant, crystallization of a salt solution and corrosion to metal, and has simple structure, no noise and no pollution. The system is applicable to wide range of heat source temperature and has good adaptability to factory environment.
(5) The system provided by the utility model can be used for fully recycling the middle-temperature and low-temperature flue gas waste heat based on the heat storage subsystem, the refrigeration subsystem and the power generation subsystem, and can be applied to the fields of low-temperature flue gas waste heat recovery in the field of non-ferrous metal molten pool smelting, low-temperature flue gas waste heat recovery in a power plant boiler and the like.
Drawings
FIG. 1 is a combined cooling and power device driven by the waste heat of low-temperature flue gas in a metallurgical furnace;
in the figure, 1-smoke exhaust pipeline, 2-gravity type high-temperature heat pipe heat exchanger, 3-high-temperature synthetic heat conduction oil heater, 4-circulating pump, 5-high-temperature synthetic heat conduction oil heat accumulator, 6-lithium bromide absorption refrigerating unit, 7-direct contact evaporator and 8-organic Rankine cycle unit.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1: as shown in fig. 1, a combined cooling and power device driven by the waste heat of low-temperature flue gas in a metallurgical furnace kiln comprises a smoke exhaust pipeline 1, a heat storage subsystem, a refrigeration subsystem and a power generation subsystem;
the inlet of the smoke exhaust pipeline 1 is communicated with the smoke outlet of the metallurgical furnace kiln, and the outlet of the smoke exhaust pipeline 1 is externally connected with a smoke collecting device;
the heat storage subsystem comprises a gravity type high-temperature heat pipe heat exchanger 2, a high-temperature synthesis heat conduction oil heater 3 and a high-temperature synthesis heat conduction oil heat accumulator 5, the top of the gravity type high-temperature heat pipe heat exchanger 2 is arranged in the smoke exhaust pipeline 1, the bottom of the gravity type high-temperature heat pipe heat exchanger 2 is arranged in the high-temperature synthesis heat conduction oil heater 3, and a hot oil outlet of the high-temperature synthesis heat conduction oil heater 3 is communicated with the high-temperature synthesis heat conduction oil heat accumulator 5;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline I of the refrigeration subsystem, a working medium outlet of the heat exchange working medium pipeline I of the refrigeration subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3, a water-cooled air conditioner or a central air conditioner is communicated with a medium inlet of a heat exchange working medium pipeline II of the refrigeration subsystem through a cold medium water or cold air pipeline I, and a medium outlet of the heat exchange working medium pipeline II of the refrigeration subsystem is communicated with the water-cooled air conditioner or the central air conditioner through a cold medium water or cold air pipeline II;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline III of the power generation subsystem, a working medium outlet of the heat exchange working medium pipeline III of the power generation subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3, and the power generation subsystem is electrically connected with an electric appliance;
the gravity type high-temperature heat pipe heat exchanger receives heat from a smoke exhaust pipeline and transfers the heat to a high-temperature synthetic heat conduction oil heater, and then the heated high-temperature synthetic heat conduction oil is conveyed to a high-temperature synthetic heat conduction oil heat accumulator;
the refrigeration subsystem receives heat brought by high-temperature synthetic heat conduction oil from the high-temperature synthetic heat conduction oil heat accumulator to drive a unit of the refrigeration subsystem to operate, and the high-temperature synthetic heat conduction oil cooled by the refrigeration subsystem is conveyed back to the forming heat conduction oil heater;
the power generation subsystem receives the high-temperature synthetic heat conduction oil conveyed by the high-temperature synthetic heat conduction oil heat accumulator to heat a refrigerant, the refrigerant is heated and evaporated to become high-temperature high-pressure steam to drive a steam turbine to generate power, and the cooled refrigerant is recycled; the high-temperature synthetic heat conduction oil after being cooled in the power generation subsystem is conveyed back to the high-temperature synthetic heat conduction oil heater;
the method comprises the following steps that low-temperature waste heat in discharged smoke of a nonferrous metal smelting furnace is used as a heat source, and the stored heat is transmitted to a refrigeration subsystem and a power generation subsystem by a high-temperature synthetic heat conduction oil heat accumulator for operation; in summer, the refrigeration subsystem takes high-temperature synthetic heat conduction oil as a heat storage working medium, and drives the unit to refrigerate by utilizing heat absorbing the high-temperature synthetic heat conduction oil for life of a plant area; in non-summer time, the power generation subsystem takes high-temperature synthetic heat conduction oil as a heat storage working medium, the refrigerant absorbs heat and evaporates into high-temperature high-pressure steam, and a generator set of the power generation subsystem is driven to generate power for production and living needs of a plant area; the full utilization of the waste heat of the medium-low temperature flue gas is realized, and the combined supply of cold and power is carried out in a plant.
Example 2: the cold-electricity cogeneration device driven by the low-temperature flue gas waste heat in the metallurgical furnace kiln of the embodiment is basically the same as the cold-electricity cogeneration device driven by the low-temperature flue gas waste heat in the metallurgical furnace kiln of the embodiment 1, and the difference is that:
the power generation subsystem comprises a direct contact type evaporator 7 and an organic Rankine cycle generator set 8, a heat exchange working medium pipeline III is arranged in the direct contact type evaporator 7 and is in contact with a refrigerant heat exchange pipe of the direct contact type evaporator 7, a refrigerant outlet of the refrigerant heat exchange pipe is communicated with a refrigerant steam inlet of the organic Rankine cycle generator set 8 through a refrigerant conveying pipeline I, and a refrigerant outlet of the organic Rankine cycle generator set 8 is communicated with a refrigerant inlet of the direct contact type evaporator 7 through a refrigerant conveying pipeline II;
the refrigeration subsystem is a lithium bromide absorption type refrigeration unit 6;
a hot oil outlet of the high-temperature synthesis heat conduction oil heater 3 is communicated with the high-temperature synthesis heat conduction oil heat accumulator 5 through a first working medium conveying pipe;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline I of the refrigeration subsystem through a second working medium conveying pipe, and a working medium outlet of the heat exchange working medium pipeline I of the refrigeration subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3 through a third working medium conveying pipe;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator 5 is communicated with a working medium inlet of a heat exchange working medium pipeline III of the power generation subsystem through a fourth working medium conveying pipe, and a working medium outlet of the heat exchange working medium pipeline III of the power generation subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater 3 through a fifth working medium conveying pipe;
circulating pumps 4 are arranged on the first working medium conveying pipe, the second working medium conveying pipe, the third working medium conveying pipe, the fourth working medium conveying pipe, the fifth working medium conveying pipe and the refrigerant conveying pipeline II;
the use method of the cold-electricity combined supply device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln comprises the following specific steps:
the gravity type high-temperature heat pipe heat exchanger receives heat from a smoke exhaust pipeline and transfers the heat to a high-temperature synthetic heat conduction oil heater, and then a circulating pump conveys the heated high-temperature synthetic heat conduction oil to a high-temperature synthetic heat conduction oil heat accumulator;
the lithium bromide absorption type refrigerating unit receives heat brought by high-temperature synthetic heat conduction oil from the high-temperature synthetic heat conduction oil heat accumulator to drive the unit to run, and the high-temperature synthetic heat conduction oil cooled in the lithium bromide absorption type refrigerating unit is conveyed back to the forming heat conduction oil heater by the circulating pump;
the direct contact type evaporator receives the high-temperature synthetic heat conduction oil conveyed by the high-temperature synthetic heat conduction oil heat accumulator to heat a refrigerant (preferably HCFC-123), the refrigerant is heated and evaporated to become high-temperature high-pressure steam, the high-temperature high-pressure steam enters an organic Rankine cycle unit to drive a steam turbine to generate electricity, and the cooled refrigerant is conveyed back to the direct contact type evaporator by a circulating pump for cyclic utilization; the high-temperature synthetic heat conduction oil cooled in the direct contact type evaporator is conveyed back to the high-temperature synthetic heat conduction oil heater by the circulating pump;
the method comprises the following steps that low-temperature waste heat in discharged smoke of a nonferrous metal smelting furnace is used as a heat source, and the stored heat is transmitted to a refrigeration subsystem and a power generation subsystem by a high-temperature synthetic heat conduction oil heat accumulator for operation; in summer, the refrigeration subsystem takes high-temperature synthetic heat-conducting oil as a heat storage working medium, and utilizes a lithium bromide (LiBr) absorption refrigeration unit for refrigeration for life use in a plant area; in non-summer, the power generation subsystem takes high-temperature synthesized heat conduction oil as a heat storage working medium, takes dichlorotrifluoroethane (HCFC-123) as a refrigerant, and generates power through an organic Rankine cycle for the production and living needs of a plant area; the full utilization of the waste heat of the medium-low temperature flue gas is realized, and the combined supply of cold and power is carried out in a plant.
Example 3: the combined cooling and power device driven by the low-temperature flue gas waste heat in the metallurgical furnace kiln of the embodiment is basically the same as the combined cooling and power device driven by the low-temperature flue gas waste heat in the metallurgical furnace kiln of the embodiment 2, and the difference is that:
the outer side of the gravity type high-temperature heat pipe exchanger 2 between the high-temperature synthesis heat conduction oil heater 3 and the smoke exhaust pipeline 1 is coated with a heat preservation layer I, the outer side of the high-temperature synthesis heat conduction oil heater 3 is coated with a heat preservation layer II, and the outer side of the high-temperature synthesis heat conduction oil heat accumulator 5 is coated with a heat preservation layer III; the thickness of the heat preservation layer I is 20-40 mm, the thickness of the heat preservation layer II is 30-50 mm, and the thickness of the heat preservation layer III is 30-50 mm; the arrangement of the heat-insulating layer I, the heat-insulating layer II and the heat-insulating layer III can avoid heat loss;
high temperature synthesis of heat transfer oil
66, the liquid state can bear the temperature of minus 7 to 350 ℃.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes and modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The utility model provides a low temperature flue gas waste heat driven cold electricity cogeneration device in metallurgical furnace which characterized in that: comprises a smoke exhaust pipeline (1), a heat storage subsystem, a refrigeration subsystem and a power generation system;
the inlet of the smoke exhaust pipeline (1) is communicated with the smoke outlet of the metallurgical furnace kiln, and the outlet of the smoke exhaust pipeline (1) is externally connected with a smoke collecting device;
the heat storage subsystem comprises a gravity type high-temperature heat pipe heat exchanger (2), a high-temperature synthesis heat conduction oil heater (3) and a high-temperature synthesis heat conduction oil heat accumulator (5), the top of the gravity type high-temperature heat pipe heat exchanger (2) is arranged in the smoke exhaust pipeline (1), the bottom of the gravity type high-temperature heat pipe heat exchanger (2) is arranged in the high-temperature synthesis heat conduction oil heater (3), and a hot oil outlet of the high-temperature synthesis heat conduction oil heater (3) is communicated with the high-temperature synthesis heat conduction oil heat accumulator (5);
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator (5) is communicated with a working medium inlet of a heat exchange working medium pipeline I of the refrigeration subsystem, a working medium outlet of the heat exchange working medium pipeline I of the refrigeration subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater (3), a water-cooled air conditioner or a central air conditioner is communicated with a medium inlet of a heat exchange working medium pipeline II of the refrigeration subsystem through a refrigerant water or cold air pipeline I, and a medium outlet of the heat exchange working medium pipeline II of the refrigeration subsystem is communicated with the water-cooled air conditioner or the central air conditioner through a refrigerant water or cold air pipeline II;
the hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator (5) is communicated with the working medium inlet of the heat exchange working medium pipeline III of the power generation subsystem, the working medium outlet of the heat exchange working medium pipeline III of the power generation subsystem is communicated with the heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater (3), and the power generation subsystem is electrically connected with an electric appliance.
2. The combined cooling and power device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln according to claim 1, is characterized in that: the outer side of the gravity type high-temperature heat pipe exchanger (2) between the high-temperature synthesis heat conduction oil heater (3) and the smoke exhaust pipeline (1) is coated with a heat preservation layer I, the outer side of the high-temperature synthesis heat conduction oil heater (3) is coated with a heat preservation layer II, and the outer side of the high-temperature synthesis heat conduction oil heat accumulator (5) is coated with a heat preservation layer III.
3. The combined cooling and power device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln according to claim 2, is characterized in that: the thickness of heat preservation I is 20 ~ 40mm, the thickness of heat preservation II is 30 ~ 50mm, and the thickness of heat preservation III is 30 ~ 50 mm.
4. The combined cooling and power device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln according to claim 1, is characterized in that: the power generation subsystem comprises a direct contact type evaporator (7) and an organic Rankine cycle generator set (8), a heat exchange working medium pipeline III is arranged in the direct contact type evaporator (7), the heat exchange working medium pipeline III is in contact with a refrigerant heat exchange pipe of the direct contact type evaporator (7), a refrigerant outlet of a refrigerant heat exchange pipe is communicated with a refrigerant steam inlet of the organic Rankine cycle generator set (8) through a refrigerant conveying pipeline I, and a refrigerant outlet of the organic Rankine cycle generator set (8) is communicated with a refrigerant inlet of the direct contact type evaporator (7) through a refrigerant conveying pipeline II.
5. The combined cooling and power device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln according to claim 1, is characterized in that: the refrigeration subsystem is a lithium bromide absorption refrigeration unit (6).
6. The combined cooling and power device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln according to claim 4, is characterized in that: a hot oil outlet of the high-temperature synthesis heat conduction oil heater (3) is communicated with the high-temperature synthesis heat conduction oil heat accumulator (5) through a first working medium conveying pipe;
a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator (5) is communicated with a working medium inlet of a heat exchange working medium pipeline I of the refrigeration subsystem through a second working medium conveying pipe, and a working medium outlet of the heat exchange working medium pipeline I of the refrigeration subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater (3) through a third working medium conveying pipe;
and a hot oil outlet of the high-temperature synthesis heat conduction oil heat accumulator (5) is communicated with a working medium inlet of a heat exchange working medium pipeline III of the power generation subsystem through a fourth working medium conveying pipe, and a working medium outlet of the heat exchange working medium pipeline III of the power generation subsystem is communicated with a heat conduction oil inlet of the high-temperature synthesis heat conduction oil heater (3) through a fifth working medium conveying pipe.
7. The combined cooling and power device driven by the waste heat of the low-temperature flue gas in the metallurgical furnace kiln according to claim 1, is characterized in that: and circulating pumps (4) are arranged on the first working medium conveying pipe, the second working medium conveying pipe, the third working medium conveying pipe, the fourth working medium conveying pipe, the fifth working medium conveying pipe and the refrigerant conveying pipeline II.
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| CN202122723610.2U CN216080468U (en) | 2021-11-09 | 2021-11-09 | Cold and electricity combined supply device driven by low-temperature flue gas waste heat in metallurgical furnace |
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| CN202122723610.2U CN216080468U (en) | 2021-11-09 | 2021-11-09 | Cold and electricity combined supply device driven by low-temperature flue gas waste heat in metallurgical furnace |
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