CN110953030A - Method and device for generating electricity by using waste heat of glass kiln - Google Patents
Method and device for generating electricity by using waste heat of glass kiln Download PDFInfo
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- CN110953030A CN110953030A CN201911137106.5A CN201911137106A CN110953030A CN 110953030 A CN110953030 A CN 110953030A CN 201911137106 A CN201911137106 A CN 201911137106A CN 110953030 A CN110953030 A CN 110953030A
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- temperature
- heat
- heat exchanger
- organic medium
- waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
- F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/02—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass involving the use of working media other than water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- 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)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a method and a device for generating power by using waste heat of a glass kiln, comprising the following steps of: 1) after the flue gas from the glass kiln at the temperature of 350-; 2) the liquid organic medium entering the evaporator is heated to 210-260 ℃ by the heat conduction oil, the gas organic medium enters the turbine for acting, the temperature of the gas organic medium is reduced, the gas organic medium is condensed into the liquid organic medium at 45-50 ℃ by the condenser, and the liquid organic medium is heated to 100-120 ℃ and then enters the evaporator again for circulation. The invention has the advantages that: the exhaust-heat boiler does not need to carry out liquid level control, does not have the blow off water to produce, does not need to prepare the pure water, and the system start can accomplish a key start, and the turbine does not need the evacuation, reduces operating personnel by a wide margin.
Description
Technical Field
The invention relates to the field of waste heat utilization of glass melting furnaces, in particular to the field of waste heat power generation of glass furnaces and flat glass furnaces.
Background
The glass kiln is an industrial kiln which utilizes fuels such as natural gas, heavy oil and the like to generate high temperature to melt glass raw materials, and the temperature of waste gas generated after the fuels are combusted is 350-650 ℃ after the waste gas leaves a melting kiln system. At present, glass kilns are all matched with waste heat boilers, and waste heat power generation systems are arranged when the melting amount is large. At present, a glass melting furnace waste heat power generation process system is characterized in that a waste heat boiler generates secondary medium-pressure and medium-temperature water vapor (1.5-2.5 MPa, 350-420 ℃), the water vapor pushes a steam turbine to do work and generate power, the steam after doing work is in a negative pressure state, and water condensed after cooling by circulating water or air is sent to the waste heat boiler by a condensate pump to complete Rankine cycle. This process system has several disadvantages: the steam waste heat boiler needs to control liquid level and sewage (a complex control system is needed); purified water needs to be prepared; the startup and shutdown of the steam turbine requires a long warm-up time; the temperature and the vibration of the steam turbine body have high control indexes; vacuumizing is needed; more operators are required.
Disclosure of Invention
The invention aims to solve the defects of complex operation process and difficult control in the existing glass melting furnace waste heat steam power generation technology, and provides a glass furnace waste heat power generation method and a device.
The technical scheme adopted by the invention is as follows:
the glass kiln waste heat power generation method comprises a waste heat boiler connected with a glass kiln and a turbine connected with the waste heat boiler, and is characterized by comprising the following steps of:
1) introducing heat transfer oil with the temperature of 120-plus-150 ℃ into a heat exchanger arranged in a waste heat boiler, after heat exchange is carried out on flue gas with the temperature of 350-plus-650 ℃ from a glass kiln through the waste heat boiler and the heat exchanger, heating the heat transfer oil introduced into the heat exchanger from the temperature of 120-plus-150 ℃ to 300-320 ℃, then introducing the heated heat transfer oil into an evaporator, and sending the heat transfer oil cooled to the temperature of 120-plus-150 ℃ through the evaporator into the heat exchanger in the waste heat boiler again to finish waste heat utilization circulation;
2) the liquid organic medium at the temperature of 100-120 ℃ entering the evaporator is heated to a gaseous organic medium at the temperature of 210-260 ℃ by the heat conduction oil, the temperature of the gaseous organic medium is reduced to 160-170 ℃ after the gaseous organic medium enters a turbine for acting, the gaseous organic medium is condensed into the liquid organic medium at the temperature of 45-50 ℃ by a condenser, and the liquid organic medium is heated to the temperature of 100-120 ℃ and then enters the evaporator again to complete the organic Rankine cycle.
In the above technical solution, the heat transfer oil may adopt the following known products, such as (1) first kno thermolinol 66, T66 for short, to synthesize heat transfer oil; (2) great wall L-QD350, heat conducting oil, etc.
As the organic medium, there can be used known products such as Cyclopentane-C5H10, isopentane, pentane, acetone, diethyl ether, R113, R365mfc and the like.
The invention also provides a device for generating power by using the waste heat of the glass kiln, which comprises a waste heat boiler connected with the glass kiln, a turbine connected with the waste heat boiler, and an engine connected with the turbine, and is characterized in that:
1) the upper part and the lower part of the waste heat boiler are respectively provided with a high-temperature heat exchanger and a low-temperature heat exchanger which are connected in series, the outlet of the high-temperature heat exchanger is connected with a gas-liquid separator through a first pipeline, the gas-liquid separator is connected with the shell pass inlet of an evaporator through the first pipeline, the shell pass outlet of the evaporator is connected with the inlet of a circulating pump through the first pipeline, and the outlet of the circulating pump is connected with the inlet of the low-temperature heat exchanger;
2) the evaporator tube pass outlet is connected with an inlet of a turbine through a second pipeline, the outlet of the turbine is connected with a heat exchanger shell pass inlet through a second pipeline, the heat exchanger shell pass outlet is connected with a condenser shell pass inlet through a second pipeline, the condenser shell pass outlet is connected with a condensing pump inlet through a second pipeline, a condensing pump outlet is connected with a tube pass inlet of the heat exchanger through a second pipeline, and the tube pass outlet of the heat exchanger is connected with the evaporator tube pass inlet through a second pipeline.
The invention has the advantages that: adopt conduction oil and organic medium to combine to generate electricity (ORC), area is little, and exhaust-heat boiler need not carry out liquid level control, and no blow off water produces, need not prepare the pure water, and the key start can be accomplished in the system start, does not need the warm-up process, and turbine machine body control is simple, does not need the evacuation, and the biggest advantage only needs few operating personnel (even alone).
In conclusion, the invention is specially designed aiming at the flue gas characteristics of the glass kiln, can effectively utilize the flue gas waste heat of the glass kiln, particularly the medium-low temperature waste heat, and has higher efficiency in the aspect of sensible heat recovery due to the low boiling point of the organic working medium compared with the traditional steam circulation; the sensible heat/latent heat in the cycle is unequal, while the proportion in the ORC technology is larger, the efficiency of the Rankine cycle is higher, the system is compact and simple, the occupied area is small, the control is simple, the number of operators is small, and the economic benefit is obvious.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed description of the invention
As shown in fig. 1, the device for generating power by using waste heat of a glass kiln, provided by the invention, comprises a waste heat boiler connected with the glass kiln, a turbine connected with the waste heat boiler, and an engine connected with the turbine, and is characterized in that:
1) the upper part and the lower part of the waste heat boiler are respectively provided with a high-temperature heat exchanger 7 and a low-temperature heat exchanger 2 which are connected in series, an outlet of the high-temperature heat exchanger 7 is connected with a gas-liquid separator 9 through a first pipeline 10, the gas-liquid separator is connected with an inlet of a shell pass of an evaporator 11 through a first pipeline, an outlet of the shell pass of the evaporator is connected with an inlet of a circulating pump 12 through a first pipeline, and an outlet of the circulating pump is connected with an inlet of the low-;
2) the outlet of the tube pass of the evaporator 11 is connected with the inlet of a turbine 14 through a second pipeline 13, the outlet of the turbine 14 is connected with the inlet of the shell pass of a heat exchanger 17 through a second pipeline, the outlet of the shell pass of the heat exchanger is connected with the inlet of the shell pass of a condenser 18 through a second pipeline, the outlet of the shell pass of the condenser is connected with the inlet of a condensation pump 19 through a second pipeline, the outlet of the condensation pump is connected with the inlet of the tube pass of the heat exchanger 17 through a second pipeline, and the outlet of the tube pass of the heat exchanger 17 is connected with the inlet of.
The invention provides a glass kiln waste heat power generation method, which comprises a waste heat boiler connected with a glass kiln and a turbine connected with the waste heat boiler, and is characterized by comprising the following steps:
1) introducing heat transfer oil with the temperature of 120-plus-150 ℃ into a heat exchanger arranged in a waste heat boiler, after heat exchange is carried out on flue gas with the temperature of 350-plus-650 ℃ from a glass kiln through the waste heat boiler and the heat exchanger, heating the heat transfer oil introduced into the heat exchanger from the temperature of 120-plus-150 ℃ to 300-320 ℃, then introducing the heated heat transfer oil into an evaporator, and sending the heat transfer oil cooled to the temperature of 120-plus-150 ℃ through the evaporator into the heat exchanger in the waste heat boiler again to finish waste heat utilization circulation;
2) the liquid organic medium at the temperature of 100-120 ℃ entering the evaporator is heated to a gaseous organic medium at the temperature of 210-260 ℃ by the heat conduction oil, the temperature of the gaseous organic medium is reduced to 160-170 ℃ after the gaseous organic medium enters a turbine for acting, the gaseous organic medium is condensed into the liquid organic medium at the temperature of 45-50 ℃ by a condenser, and the liquid organic medium is heated to the temperature of 100-120 ℃ and then enters the evaporator again to complete the organic Rankine cycle.
The working medium of the waste heat boiler is heat conducting oil (T66 or L-QD 350), the heat conducting oil is heated to 300-320 ℃ from 120-150 ℃ by utilizing the waste heat of the smoke of the melting furnace, the heat conducting oil passes through an evaporator (a tubular heat exchanger) and then transfers heat to certain organic working media (cyclopentane, isopentane, acetone R113 and the like), the organic working media with the secondary and medium pressure (2.5-3 MPa) absorb heat from the liquid state of 100-120 ℃ and then become gas state 210-260 ℃ to push a turbine to do work and generate power, the organic gas after doing work is in a micro-positive pressure low-temperature state (0.12-0.15 MPa, 160-170 ℃), rich heat is released through a heat exchanger (the tubular heat exchanger), the organic gas after doing work is cooled by circulating water or air and then condensed into liquid state (45-50 ℃), and then the organic Rankine cycle is finished by sending the.
The following table is a comparison table of work parameters of the waste heat power generation turbine of the glass melting furnace
As can be seen from the above comparative table, the sensible/latent heat of the process of the present invention is significantly higher than that of the existing steam driven process.
Claims (2)
1. The glass kiln waste heat power generation method comprises a waste heat boiler connected with a glass kiln and a turbine connected with the waste heat boiler, and is characterized by comprising the following steps of:
1) introducing heat transfer oil with the temperature of 120-plus-150 ℃ into a heat exchanger arranged in a waste heat boiler, after heat exchange is carried out on flue gas with the temperature of 350-plus-650 ℃ from a glass kiln through the waste heat boiler and the heat exchanger, heating the heat transfer oil introduced into the heat exchanger from the temperature of 120-plus-150 ℃ to 300-320 ℃, then introducing the heated heat transfer oil into an evaporator, and sending the heat transfer oil cooled to the temperature of 120-plus-150 ℃ through the evaporator into the heat exchanger in the waste heat boiler again to finish waste heat utilization circulation;
2) heating the liquid organic medium at the temperature of 100-120 ℃ entering the evaporator to a gaseous organic medium at the temperature of 210-260 ℃ by using heat conduction oil, reducing the temperature of the gaseous organic medium to 160-170 ℃ after the gaseous organic medium enters a turbine for acting, condensing the gaseous organic medium into the liquid organic medium at the temperature of 45-50 ℃ by using a condenser, heating the liquid organic medium to the temperature of 100-120 ℃, and then re-entering the evaporator to complete the organic Rankine cycle;
the heat conduction oil is heat conduction oil synthesized by first Nuo Therminol66 or heat conduction oil synthesized by great wall L-QD 350;
the organic medium is one of Cyclopentane-C5H10, isopentane, pentane, acetone, diethyl ether, R113 and R365 mfc.
2. The utility model provides a device of glass kiln waste heat power generation, includes the exhaust-heat boiler who links to each other with the glass kiln to and the turbine that links to each other with exhaust-heat boiler, the engine associative with the turbine, its characterized in that:
1) the upper part and the lower part of the waste heat boiler are respectively provided with a high-temperature heat exchanger (7) and a low-temperature heat exchanger (2) which are connected in series, an outlet of the high-temperature heat exchanger (7) is connected with a gas-liquid separator (9) through a first pipeline (10), the gas-liquid separator is connected with a shell pass inlet of an evaporator (11) through the first pipeline, the shell pass outlet of the evaporator is connected with an inlet of a circulating pump (12) through the first pipeline, and an outlet of the circulating pump is connected with an inlet of the low-temperature heat exchanger (2); 2) the outlet of the tube pass of the evaporator (11) is connected with the inlet of a turbine (14) through a second pipeline (13), the outlet of the turbine (14) is connected with the inlet of the shell pass of a heat exchanger (17) through a second pipeline, the outlet of the shell pass of the heat exchanger is connected with the inlet of the shell pass of a condenser (18) through a second pipeline, the outlet of the shell pass of the condenser is connected with the inlet of a condensate pump (19) through a second pipeline, the outlet of the condensate pump is connected with the inlet of the tube pass of the heat exchanger (17) through a second pipeline, and the outlet of the tube pass of the heat exchanger (17) is connected with the inlet of the tube pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911137106.5A CN110953030A (en) | 2019-11-19 | 2019-11-19 | Method and device for generating electricity by using waste heat of glass kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911137106.5A CN110953030A (en) | 2019-11-19 | 2019-11-19 | Method and device for generating electricity by using waste heat of glass kiln |
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| CN110953030A true CN110953030A (en) | 2020-04-03 |
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| CN201911137106.5A Pending CN110953030A (en) | 2019-11-19 | 2019-11-19 | Method and device for generating electricity by using waste heat of glass kiln |
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| CN103941764A (en) * | 2014-05-10 | 2014-07-23 | 蚌埠玻璃工业设计研究院 | Adjusting device for denitration temperature of waste heat power generation boiler in glass furnace |
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| CN109826686A (en) * | 2019-03-25 | 2019-05-31 | 深圳市奥宇节能技术股份有限公司 | Residual neat recovering system |
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2019
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| CN101298843A (en) * | 2008-06-05 | 2008-11-05 | 昆明理工大学 | Method for supercritical Rankine cycle recycling low-temperature waste heat power |
| US20120090321A1 (en) * | 2009-05-09 | 2012-04-19 | Gaertner Jan | Exhaust gas heat utilization in motor vehicles |
| US20110278846A1 (en) * | 2010-05-14 | 2011-11-17 | Giacomo Landi | Turboexpander for power generation systems |
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Application publication date: 20200403 |