CN107401432B - Reduced ilmenite particle thermoelectric coupling co-supply system and method - Google Patents
Reduced ilmenite particle thermoelectric coupling co-supply system and method Download PDFInfo
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- CN107401432B CN107401432B CN201710764454.XA CN201710764454A CN107401432B CN 107401432 B CN107401432 B CN 107401432B CN 201710764454 A CN201710764454 A CN 201710764454A CN 107401432 B CN107401432 B CN 107401432B
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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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
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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
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2001/00—Composition, conformation or state of the charge
- F27M2001/02—Charges containing ferrous elements
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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
Abstract
The invention provides a reduced ilmenite particle thermoelectric coupling combined supply system and a method, wherein the system comprises a solid heat exchanger, an evaporator, a turbine generator set and a cooling tower; the high-temperature solid feed inlet of the solid heat exchanger is connected with the high-temperature solid discharge outlet of the rotary kiln through a 1 st valve; the low-temperature solid discharge port of the solid heat exchanger is connected with a finished product warehouse through a discharge pipe; the high-temperature hot water outlet of the solid heat exchanger is connected with the water inlet of the evaporator; the high-temperature water outlet of the evaporator is connected with one end of a heat supply pipeline of a heat supply user, and the other end of the heat supply pipeline of the heat supply user is connected to a low-temperature hot water inlet of the solid heat exchanger after passing through the booster pump. The advantages are that: the method can recover the high-temperature sensible heat of the reduced ilmenite particles to the maximum extent, convert the high-temperature sensible heat into electric energy, supply heat to heat users, directly replace an original cooler in the production process of the reduced ilmenite to reduce production energy consumption, and has very important significance for reducing energy consumption and improving economic benefit of enterprises.
Description
Technical Field
The invention belongs to the technical field of waste heat power generation, and particularly relates to a reduced ilmenite particle thermoelectric coupling combined supply system and method.
Background
China is world TiO 2 One of the most abundant countries, but most of the TiO 2 In the form of ilmenite. The rotary kiln production process for reducing ilmenite has the characteristics of high yield, small environmental pollution, stable product quality and the like, so that the production process is increasingly applied and popularized.
At present, the reduced ilmenite particles discharged from the rotary kiln have high temperature, a large amount of waste heat cannot be effectively utilized all the time, and huge energy waste is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a reduced ilmenite particle thermoelectric coupling combined supply system and a method, which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides a reduced ilmenite particle thermoelectric coupling combined supply system which comprises a solid heat exchanger (6), an evaporator (7), a turbine generator set and a cooling tower (15); the turbine generator set comprises a turbine (10) and a generator (11);
the high-temperature solid feed inlet of the solid heat exchanger (6) is connected with the high-temperature solid discharge outlet of the kiln head cover (1) of the rotary kiln (2) through a 1 st valve (3); the low-temperature solid discharge port of the solid heat exchanger (6) is connected with a finished product warehouse (20) through a discharge pipe; the solid heat exchanger (6) is provided with a low-temperature hot water inlet and a high-temperature hot water outlet, and the high-temperature hot water outlet of the solid heat exchanger (6) is connected with the water inlet of the evaporator (7); the high-temperature water outlet of the evaporator (7) is connected with one end of a heat supply pipeline of a heat supply user (8), and the other end of the heat supply pipeline of the heat supply user (8) is connected to a low-temperature hot water inlet of the solid heat exchanger (6) after passing through a booster pump (9); thereby forming a circulation loop;
the superheated steam outlet of the evaporator (7) is connected to the turbine (10) through a pipeline to apply work and drive the generator (11) to output electric energy outwards; the tail dead steam of the turbine (10) is condensed into liquid state through a condenser (12), and is connected to an organic working medium inlet of the evaporator (7) through a working medium pump (13); thereby forming a circulation loop;
the circulating water outlet of the cooling tower (15) is connected to the circulating water inlet of the condenser (12) through a circulating water pump (14); the circulating water outlet of the condenser (12) is connected with the circulating water inlet of the cooling tower (15); thereby forming a circulation loop.
Preferably, the high-temperature solid discharge port of the kiln head cover (1) of the rotary kiln (2) is also connected with the inlet of the cooler (5) through a valve (4) of the 2 nd; the outlet of the cooler (5) is connected with the finished product warehouse (20).
Preferably, the flue gas outlet at the kiln tail of the rotary kiln (2) is connected with the flue gas inlet of a chimney (19) after sequentially passing through an air cooler (16), a bag type dust collector (17) and an induced draft fan (18).
Preferably, the solid heat exchanger (6) is arranged vertically, a tower-shaped distributor is arranged at the inlet of the solid heat exchanger (6), a material level monitoring device is arranged in the solid heat exchanger, and a plurality of connecting pipes are arranged at the outlet of the solid heat exchanger (6); the heating surface of the solid heat exchanger (6) adopts a multi-channel membrane type wall structure.
The invention also provides a method based on the reduced ilmenite particle thermoelectric coupling combined supply system, which comprises the following steps of:
the high-temperature reduced ilmenite particles discharged from the rotary kiln (2) enter the solid heat exchanger (6) to exchange heat with low-temperature hot water flowing into the solid heat exchanger (6), the temperature of the high-temperature reduced ilmenite particles is reduced to be lower than 150 ℃ after the high-temperature reduced ilmenite particles pass through the solid heat exchanger (6) to exchange heat, and the reduced ilmenite particles after the temperature reduction enter a finished product warehouse (20) to be stored; the low-temperature hot water absorbs heat after heat exchange by the solid heat exchanger (6) so as to raise the temperature, and high-temperature hot water is obtained; then, after the high-temperature water flows through the evaporator (7) and transfers heat to the organic working medium, the high-temperature water flows into a heat supply pipeline of a heat supply user (8) for heating the user; after passing through the pressurizing pump (9), the heated hot water flows to a low-temperature hot water inlet of the solid heat exchanger (6), thereby forming a circulation loop;
the organic working medium enters the evaporator (7) to absorb heat under the driving of the working medium pump (13), and the generated superheated steam enters the turbine (10) to apply work through a pipeline and drives the generator (11) to output electric energy outwards; the exhaust steam at the tail of the turbine (10) is condensed into liquid state through a condenser (12) and enters the evaporator (7) through a working medium pump (13) again, so that a closed loop is formed;
in addition, the circulating water discharged from the cooling tower (15) enters the condenser (12) to absorb heat under the drive of the circulating water pump (14), and the circulating water after absorbing the heat returns to the cooling tower (15) to release heat and starts a new cycle.
The reduced ilmenite particle thermoelectric coupling combined supply system and method provided by the invention have the following advantages:
the reduced ilmenite particle thermoelectric coupling combined supply system can recover high-temperature sensible heat of reduced ilmenite particles to the maximum extent, convert the high-temperature sensible heat into electric energy, supply heat to heat users, directly replace an original cooler in the reduced ilmenite production process to reduce production energy consumption, and has very important significance for enterprises to reduce energy consumption and improve economic benefits.
Drawings
FIG. 1 is a schematic diagram of a reduced ilmenite particle thermoelectric coupling co-supply system provided by the invention;
wherein: 1. kiln hood, 2, rotary kiln, 3, 1 st valve, 4, 2 nd valve, 5, cooler, 6, solid heat exchanger, 7, evaporator, 8, heat supply user, 9, booster pump, 10, turbine, 11, generator, 12, condenser, 13, working medium pump, 14, circulating water pump, 15, cooling tower, 16, air cooler, 17, bag filter, 18, induced draft fan, 19, chimney. 20. A finished product warehouse;
fig. 2 is a schematic structural diagram of a solid heat exchanger provided by the invention;
21. an ilmenite particle inlet; 22. a tower-shaped distributor; 23. an inlet feed water pipe; 24. an outlet return line; 25. ilmenite particle conveyor.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a thermoelectric coupling combined supply system and a thermoelectric coupling combined supply method for reducing ilmenite particles, which can fully recover the waste heat of the ilmenite particles and have great significance for reducing energy consumption and improving economic benefit of enterprises.
Specifically, the reduced ilmenite particle thermoelectric coupling combined supply system can recover high-temperature sensible heat of the reduced ilmenite particles to the maximum extent, convert the high-temperature sensible heat into electric energy, supply heat to heat users, directly replace an original cooler in the reduced ilmenite production process to reduce the production energy consumption, and do not influence continuous and stable operation of the original production process. Belongs to the technical field of waste heat power generation.
Referring to fig. 1, the reduced ilmenite particle thermoelectric coupling co-supply system includes a solid heat exchanger 6, an evaporator 7, a turbine generator set, and a cooling tower 15; the turbine generator set comprises a turbine 10 and a generator 11;
the high-temperature solid feed inlet of the solid heat exchanger 6 is connected with the high-temperature solid discharge outlet of the kiln head cover 1 of the rotary kiln 2 through the 1 st valve 3; the low-temperature solid discharge port of the solid heat exchanger 6 is connected with a finished product warehouse 20 through a discharge pipe; the solid heat exchanger 6 is provided with a low-temperature hot water inlet and a high-temperature hot water outlet, and the high-temperature hot water outlet of the solid heat exchanger 6 is connected with the water inlet of the evaporator 7; the high-temperature water outlet of the evaporator 7 is connected with one end of a heat supply pipeline of a heat supply user 8, and the other end of the heat supply pipeline of the heat supply user 8 is connected to a low-temperature hot water inlet of the solid heat exchanger 6 after passing through a booster pump 9; thereby forming a circulation loop; the solid heat exchanger 6 is arranged vertically, and a tower-shaped distributor is arranged at the inlet of the solid heat exchanger 6, so that the reduced ilmenite particles can be ensured to uniformly distribute each heating surface along the circumferential direction; the material level monitoring device is arranged in the solid heat exchanger, the outlet of the solid heat exchanger 6 is provided with a plurality of connecting pipes, the elevation angle of the connecting pipes is larger than 45 degrees, the blanking uniformity is ensured, the problem of core pulling of particles in the solid heat exchanger is solved, and the service efficiency and the service life of equipment are improved. The heating surface of the solid heat exchanger 6 adopts a multi-channel membrane wall structure, and the distance between the outer walls of the membrane walls is not less than 100mm; the respective membrane walls are arranged vertically.
The superheated steam outlet of the evaporator 7 is connected to the turbine 10 through a pipeline to apply work and drive the generator 11 to output electric energy outwards; the tail exhaust steam of the turbine 10 is condensed into liquid state through a condenser 12 and is connected to an organic working medium inlet of the evaporator 7 through a working medium pump 13; thereby forming a circulation loop;
the circulating water outlet of the cooling tower 15 is connected to the circulating water inlet of the condenser 12 through a circulating water pump 14; the circulating water outlet of the condenser 12 is connected with the circulating water inlet of the cooling tower 15; thereby forming a circulation loop.
In addition, the high-temperature solid discharge port of the kiln head cover 1 of the rotary kiln 2 is also connected with the inlet of the cooler 5 through the 2 nd valve 4; the outlet of the cooler 5 is connected to a finished product warehouse 20. The purpose of this bypass is to: when the equipment of the cogeneration system fails, the whole system can exit from the reduced ilmenite production process, and the reduced ilmenite particles discharged from the rotary kiln are discharged into a finished product warehouse 20 after directly passing through the cooler 5.
The flue gas outlet at the tail of the rotary kiln 2 also sequentially passes through the air cooler 16, the bag type dust collector 17 and the induced draft fan 18 and is connected with the flue gas inlet of the chimney 19, and the flue gas discharged from the rotary kiln is purified and then discharged into the atmosphere, so that the environment is prevented from being polluted.
The invention also provides a method based on the reduced ilmenite particle thermoelectric coupling co-supply system, which comprises the following steps:
the high-temperature reduced ilmenite particles discharged from the rotary kiln 2 enter the solid heat exchanger 6 to exchange heat with low-temperature hot water flowing into the solid heat exchanger 6, the temperature of the high-temperature reduced ilmenite particles is reduced to be lower than 150 ℃ after the high-temperature reduced ilmenite particles pass through the solid heat exchanger 6 to exchange heat, and the reduced ilmenite particles after the temperature reduction enter a finished product warehouse 20 to be stored; the low-temperature hot water absorbs heat after heat exchange by the solid heat exchanger 6 so as to raise the temperature, and high-temperature hot water is obtained; then, after the high-temperature water flows through the evaporator 7 and transfers heat to the organic working medium, the high-temperature water flows into a heat supply pipeline of a heat supply user 8 for heating the user; after passing through the pressurizing pump 9, the heated hot water flows to a low-temperature hot water inlet of the solid heat exchanger 6, thereby forming a circulation loop; wherein R245fa can be used as the organic working medium.
The organic working medium enters the evaporator 7 to absorb heat under the driving of the working medium pump 13, and the generated superheated steam enters the turbine 10 to do work through a pipeline and drives the generator 11 to output electric energy outwards; the dead steam at the tail of the turbine 10 is condensed into liquid state through a condenser 12 and enters the evaporator 7 through a working medium pump 13 again, so that a closed loop is formed;
in addition, the circulating water discharged from the cooling tower 15 enters the condenser 12 to absorb heat under the driving of the circulating water pump 14, and the circulating water after absorbing heat returns to the cooling tower 15 to release heat, and starts a new cycle.
The reduced ilmenite particle thermoelectric coupling combined supply system and method provided by the invention have the following advantages:
(1) The heating surface of the solid heat exchanger adopts a multi-channel membrane wall structure to form a material channel. On one hand, the reduced ilmenite particles uniformly pass through each heating surface along the gravity direction, are not easy to block, not only are the heat exchange rate controllable, but also the effective heat exchange area is greatly increased; on the other hand, the solid heat exchanger adopts a multichannel heating surface structure, so that the solid heat exchanger can adapt to the particle temperature and flow change caused by fluctuation of the ilmenite reduction process, ensures the stability of the outlet parameters of the solid heat exchanger, and improves the safety and stability of the thermoelectric coupling combined supply system.
(2) The solid heat exchanger is embedded into the reduced ilmenite production system to directly replace a cooler in the original production process, so that the solid heat exchanger and the reduced ilmenite production system are integrated, and the reduction ilmenite particle temperature is reduced to be lower than 150 ℃. When the equipment of the cogeneration system fails, the whole system can withdraw from the reduced ilmenite production process, thereby ensuring that the stable operation of the original production process is not disturbed.
(3) Through the full-flow research of the reduced ilmenite production process, a high-reliability DCS control system suitable for the combined supply of thermoelectric coupling under variable working conditions is developed, the cooperative integration and optimization of the reduced ilmenite production process and the combined supply system of thermoelectric coupling are realized, and the relative operation rate and reliability of the whole system are improved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (1)
1. A method based on a reduced ilmenite particle thermoelectric coupling co-supply system, which is characterized by comprising a solid heat exchanger (6), an evaporator (7), a turbine generator set and a cooling tower (15); the turbine generator set comprises a turbine (10) and a generator (11);
the high-temperature solid feed inlet of the solid heat exchanger (6) is connected with the high-temperature solid discharge outlet of the kiln head cover (1) of the rotary kiln (2) through a 1 st valve (3); the low-temperature solid discharge port of the solid heat exchanger (6) is connected with a finished product warehouse (20) through a discharge pipe; the solid heat exchanger (6) is provided with a low-temperature hot water inlet and a high-temperature hot water outlet, and the high-temperature hot water outlet of the solid heat exchanger (6) is connected with the water inlet of the evaporator (7); the high-temperature water outlet of the evaporator (7) is connected with one end of a heat supply pipeline of a heat supply user (8), and the other end of the heat supply pipeline of the heat supply user (8) is connected to a low-temperature hot water inlet of the solid heat exchanger (6) after passing through a booster pump (9); thereby forming a circulation loop;
the superheated steam outlet of the evaporator (7) is connected to the turbine (10) through a pipeline to apply work and drive the generator (11) to output electric energy outwards; the tail dead steam of the turbine (10) is condensed into liquid state through a condenser (12), and is connected to an organic working medium inlet of the evaporator (7) through a working medium pump (13); thereby forming a circulation loop;
the circulating water outlet of the cooling tower (15) is connected to the circulating water inlet of the condenser (12) through a circulating water pump (14); the circulating water outlet of the condenser (12) is connected with the circulating water inlet of the cooling tower (15); thereby forming a circulation loop;
the high-temperature solid discharge port of the kiln head cover (1) of the rotary kiln (2) is also connected with the inlet of the cooler (5) through a valve (4) of the 2 nd; the outlet of the cooler (5) is connected with the finished product warehouse (20);
the flue gas outlet of the kiln tail of the rotary kiln (2) is connected with the flue gas inlet of a chimney (19) after sequentially passing through an air cooler (16), a bag type dust collector (17) and an induced draft fan (18);
the solid heat exchanger (6) is arranged vertically, a tower-shaped distributor is arranged at the inlet of the solid heat exchanger (6), a material level monitoring device is arranged in the solid heat exchanger, and a plurality of connecting pipes are arranged at the outlet of the solid heat exchanger (6); the heating surface of the solid heat exchanger (6) adopts a multi-channel membrane type wall structure;
a method based on a reduced ilmenite particle thermoelectric coupling co-feed system comprising the steps of:
the high-temperature reduced ilmenite particles discharged from the rotary kiln (2) enter the solid heat exchanger (6) to exchange heat with low-temperature hot water flowing into the solid heat exchanger (6), the temperature of the high-temperature reduced ilmenite particles is reduced to be lower than 150 ℃ after the high-temperature reduced ilmenite particles pass through the solid heat exchanger (6) to exchange heat, and the reduced ilmenite particles after the temperature reduction enter a finished product warehouse (20) to be stored; the low-temperature hot water absorbs heat after heat exchange by the solid heat exchanger (6) so as to raise the temperature, and high-temperature hot water is obtained; then, after the high-temperature water flows through the evaporator (7) and transfers heat to the organic working medium, the high-temperature water flows into a heat supply pipeline of a heat supply user (8) for heating the user; after passing through the pressurizing pump (9), the heated hot water flows to a low-temperature hot water inlet of the solid heat exchanger (6), thereby forming a circulation loop;
the organic working medium enters the evaporator (7) to absorb heat under the driving of the working medium pump (13), and the generated superheated steam enters the turbine (10) to apply work through a pipeline and drives the generator (11) to output electric energy outwards; the exhaust steam at the tail of the turbine (10) is condensed into liquid state through a condenser (12) and enters the evaporator (7) through a working medium pump (13) again, so that a closed loop is formed;
in addition, the circulating water discharged from the cooling tower (15) enters the condenser (12) to absorb heat under the drive of the circulating water pump (14), and the circulating water after absorbing the heat returns to the cooling tower (15) to release heat and starts a new cycle.
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| CN111912242A (en) * | 2020-07-15 | 2020-11-10 | 新疆凯盛建材设计研究院（有限公司） | Dolomite sand calcines rotary kiln exhaust treatment system |
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| CN101555808A (en) * | 2008-04-11 | 2009-10-14 | 无锡市东方环境工程设计研究所有限公司 | Method and special device for collecting surplus heat of flushing cinder hot water of iron-smelting furnace |
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