CN102261852B - Structure of lime kiln residual heat recovery device - Google Patents
Structure of lime kiln residual heat recovery device Download PDFInfo
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- CN102261852B CN102261852B CN2011101825366A CN201110182536A CN102261852B CN 102261852 B CN102261852 B CN 102261852B CN 2011101825366 A CN2011101825366 A CN 2011101825366A CN 201110182536 A CN201110182536 A CN 201110182536A CN 102261852 B CN102261852 B CN 102261852B
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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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 relates to a structure of a lime kiln residual heat recovery device. The structure comprises a lime kiln residual heat smoke outlet, a dust removal system, a booster fan, a circulation system and a chimney which are communicated with one another, and solves the problems of low-temperature corrosion caused by smoke deposition of a lime kiln and low heat transfer coefficient between an inner wall and an outer wall of a heat exchanger pipe caused by adoption of low smoke temperature transfer and a low boiling point working medium; moreover, the residual heat of smoke of the lime kiln can be effectively recycled and is converted into electric energy, so that the utilization rate of the energy source is improved, the pollution to the environment and the waste of the energy source are reduced. Moreover, the structure has the characteristics of low investment, simple structure and stable running.
Description
Technical field
The invention belongs to industrial furnace residual heat and utilize technical field, be specifically related to a kind of structure of lime kiln residual heat recovery device.
Background technology
Exist the residual heat resources that have a large capacity and a wide range in industries such as metallurgy, building materials, chemical industry, machinery, light industry and food, these waste heats are recycled, can greatly save the energy resource consumption of China, reduce simultaneously the discharging of pollutant.Building material industry is typical highly energy-consuming industry, because industry development is rapid, the waste heat of building materials stove is very abundant, available having a high potential.Take in the limekiln as example, the industry such as steel and iron industry, calcium carbide industry, aluminum oxide industry, refractory material all are the lime consumption rich anies influential family, because these several industries had driven the high speed development in limekiln with 20% speed increment in recent years.At present, the above limekiln of national 600t/d has 100, and the whole nation is with the speed increment in every year 10%.The large-scale active lime production line of domestic 600-1200t/d in process of production, smog discharge temperature is high, is about 240～260 ℃; The dust contained flue gas granularity is large, can reach 20mm.This part fume afterheat is effectively utilized, can greatly reduce energy waste, increase economy and the feature of environmental protection in limekiln.The scientific technological advance thinking of China, the process industry such as primary study exploitation metallurgy, chemical industry and transportation etc. are power-saving technology and the equipment in highly energy-consuming field mainly.
It is at present, domestic that utilization relates generally to heat supply and generating about lime kiln afterheat.Utilize conduction oil as circulatory mediator, reclaim heat energy; Utilize the waste-heat CO in limekiln
2Working medium is heated to overcritical, the pushing turbine generating.But these UTILIZATION OF VESIDUAL HEAT IN technology are not promoted by practice.And other building materials stove UTILIZATION OF VESIDUAL HEAT IN as are applied to the pure low-temperature cogeneration technology of cement kiln UTILIZATION OF VESIDUAL HEAT IN, through the development in a plurality of stages, and comparative maturity.But water draw stall cogeneration technology, development lime kiln afterheat electricity generation system.But, because the flow of lime kiln afterheat, temperature, dustiness are in constantly changing, limekiln outlet flue gas particle caking property is strong, the dust-laden grain graininess is large, and has stronger corrosivity, lime kiln afterheat enters corrosion and the abrasion that can cause heat-exchanging tube bundle in the heat exchanger, can make the heat exchanger damage inactivation when serious; Secondly, because limekiln outlet exhaust gas temperature is low, the boiling point of steam is high, adopts the water vapour Rankine cycle uneconomical, need to select low-boiling organic working medium, but the coefficient of heat transfer of low boiling organic working medium and inside pipe wall must improve the coefficient of heat transfer of the interior low boiling working fluid of pipe and inside pipe wall far below water, could obtain the level suitable with the water coefficient of heat transfer, otherwise, can cause heat exchanger volume huge, weight is considerably beyond the heat exchanger weight take water as working medium circulation; The 3rd, the limekiln exit gas temperature is lower, and in order to reduce metal consumption, the outer cylinder structure that must adopt enhanced heat exchange of pipe could obtain the rational exhaust heat utilization effect of Technical Economy.
Summary of the invention
The deficiency that exists in order to overcome above-mentioned prior art, the object of the present invention is to provide a kind of structure of lime kiln residual heat recovery device, solved cold end corrosion that limekiln flue gas dust stratification causes and because adopting low cigarette temperature to change the heat exchanger tube inside and outside wall coefficient of heat transfer problem on the low side that causes with low boiling working fluid, and can effective recycling limekiln fume afterheat, be converted into electric energy, improve energy utilization rate, environmental contamination reduction and energy waste, it is little to have investment, characteristics simple in structure, stable.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of structure of lime kiln residual heat recovery device, comprise the high-voltage electrostatic dust separator 2 that entering-dust mouth and the outlet of the waste heat flue 1 in limekiln 15 are conducted and are connected, the smoke inlet of superheater 3 is conducted and is connected in the dust mouth of high-voltage electrostatic dust separator 2 and the heat exchanger 16, the exhanst gas outlet of evaporimeter high temperature section 4 is conducted with the entering-dust mouth of sack cleaner 5 and is connected in the heat exchanger 16, the dust mouth of sack cleaner 5 is conducted with the import of booster fan 6 and is connected, the smoke inlet of evaporimeter low-temperature zone 7 is conducted and is connected in the outlet of booster fan 6 and the heat exchanger 16, the exhanst gas outlet of economizer 8 is connected the outlet of being connected with circulating pump with chimney 9 and is conducted and is connected in the heat exchanger 16 with air intake, the import of circulating pump 10 also is conducted with the venthole of condenser 11 and is connected, the steam ports that enters of condenser 11 also is conducted with the steam drain of turbine 13 and is connected, the air intake of turbine 13 is conducted with the working substance steam outlet of superheater 3 and is connected, and turbine 13 is connected with generator 12 axles; Generator 12, turbine 13, condenser 11, circulating pump 10 and heat exchanger 16 consist of the circulatory system, and the cycle fluid 14 in the described circulatory system is R113, and high-voltage electrostatic dust separator 2 and sack cleaner 5 consist of dust pelletizing system in addition.
The high-voltage electrostatic dust separator 2 of described dust pelletizing system and sack cleaner 5 place respectively before the superheater 3 and after the booster fan 6.
The superheater 3 of described heat exchanger and evaporimeter high temperature section 4 are internal thread needle-tube or internal thread H type finned tube, and are furnished with dynamic soot blower.
The evaporimeter low-temperature zone 7 of described heat exchanger and economizer 8 are the internal thread spiral fin coil, and are furnished with special dynamic soot blower.
Because cycle fluid of the present invention adopts R113, this working medium is not flammable without burn into, and environmental pollution is few; Boiling point is low, and is high to the organic efficiency of low-temperature heat source; Heat stability is good.But, because the coefficient of heat transfer of low boiling organic working medium and inside pipe wall is far below water, the present invention selects riffled tube to improve the coefficient of heat transfer of the interior low boiling working fluid of pipe and inside pipe wall, and the riffled tube inwall coefficient of heat transfer is 5～6 times of light pipes, can obtain the level suitable with the water coefficient of heat transfer; Because of limekiln outlet flue gas particle caking property strong, the dust-laden grain graininess is large, easy dust stratification, therefore, the present invention is divided into two dust pelletizing system, and high cigarette warm area adopts high-voltage electrostatic dust separator 2, and low cigarette warm area adopts sack cleaner 5, the best long-term work temperature of high-voltage electrostatic dust separator 2 is 250 ℃, and allowing the highest flue gas is 350 ℃; Dust pelletizing system is carried out pre-dedusting to flue gas, reduces high-temperature section heat exchanger 3,4 superficial dust; The limekiln exit gas temperature is on the low side, belongs to low cigarette temperature UTILIZATION OF VESIDUAL HEAT IN, and therefore, heat exchanger tube need to select the cast of augmentation of heat transfer to improve the fume side coefficient of heat transfer.Superheater 3 and evaporimeter high temperature section 4 are selected the strong needle-tube of anti-dust stratification ability or H type finned tube; Evaporimeter low-temperature zone 7 and economizer 8 adopt spiral fin coil; Not thorough because of high-voltage electrostatic dust separator 2 high-temperature dust removals, also there is the flue dust of some in the flue gas, superheater 3 and evaporimeter high temperature section 4 working environments are more abominable, and CaO accounts for about 50% in the soot dust granule of general limekiln, coke powder 30～40%, all the other are CaCO
3, MgO, SiO
2, Al
2O
3Deng.Free lime dust light specific gravity, viscosity is large, and hydrophily is strong, and therefore the dust dust stratification that easily hardens adopts the strong needle-tube of anti-dust stratification ability or H type finned tube after the moisture absorption; Simultaneously, install reasonably dynamically soot blower additional, guarantee that its heating surface heat exchange is in operation and be in good state; This invention system is simple, can effectively reclaim the limekiln fume afterheat, and efficiency of energy utilization is high; Limekiln flue gas dust stratification, cold end corrosion have thoroughly been solved and because adopting low cigarette temperature to change the inside and outside wall coefficient of heat transfer of the heat exchanger tube that causes with low boiling working fluid series of problems on the low side; Reclaim the 2.5MW TRT of 1000t/d lime rotary kiln waste heat as example take a cover, according to utilizing calculating in 7200 hours year, year delivery 1,656 ten thousand kwh (power station is from power consumption rate 8%), calculate according to 0.6 yuan/kwh of electricity price, 993.6 ten thousand yuan of the creations of value, save 5700 tons in mark coal year, reduce 1.63 ten thousand tons of CO2 emissions.Have significant economy, society and environmental benefit; The structural configuration technology of this lime kiln residual heat recovery device can promote the use of the fields such as the ceramic sintering, solar energy utilization, geothermal utilization of building material industry, has important popularizing application prospect, and industrialized scale is extremely huge.
Description of drawings
Accompanying drawing is operation principle structural representation of the present invention, and wherein arrow represents flow direction.
The specific embodiment
The present invention will be described in more detail below in conjunction with accompanying drawing.
As shown in drawings, the structure of lime kiln residual heat recovery device, comprise the high-voltage electrostatic dust separator 2 that entering-dust mouth and the outlet of the waste heat flue 1 in limekiln 15 are conducted and are connected, the smoke inlet of superheater 3 is conducted and is connected in the dust mouth of high-voltage electrostatic dust separator 2 and the heat exchanger 16, the exhanst gas outlet of evaporimeter high temperature section 4 is conducted with the entering-dust mouth of sack cleaner 5 and is connected in the heat exchanger 16, the dust mouth of sack cleaner 5 is conducted with the import of booster fan 6 and is connected, the smoke inlet of evaporimeter low-temperature zone 7 is conducted and is connected in the outlet of booster fan 6 and the heat exchanger 16, the exhanst gas outlet of economizer 8 is connected the outlet of being connected with circulating pump with chimney 9 and is conducted and is connected in the heat exchanger 16 with air intake, the import of circulating pump 10 also is conducted with the venthole of condenser 11 and is connected, the steam ports that enters of condenser 11 also is conducted with the steam drain of turbine 13 and is connected, the air intake of turbine 13 is conducted with the working substance steam outlet of superheater 3 and is connected, and turbine 13 is connected with generator 12 axles; Generator 12, turbine 13, condenser 11, circulating pump 10 and heat exchanger 16 consist of the circulatory system, and the cycle fluid 14 in the described circulatory system is R113, and high-voltage electrostatic dust separator 2 and sack cleaner 5 consist of dust pelletizing system in addition.The high-voltage electrostatic dust separator 2 of described dust pelletizing system and sack cleaner 5 place respectively before the superheater 3 and after the booster fan 6.The superheater 3 of described heat exchanger and evaporimeter high temperature section 4 are internal thread needle-tube or internal thread H type finned tube, and are furnished with dynamic soot blower.The evaporimeter low-temperature zone 7 of described heat exchanger and economizer 8 are the internal thread spiral fin coil, and are furnished with special dynamic soot blower.
Operation principle of the present invention is: the waste heat flue 1 in limekiln 15 is delivered to high-voltage electrostatic dust separator 2 with the waste heat flue gas and carries out dedusting, subsequently the waste heat flue gas after the dedusting is sent to superheater 3 carry out overheated, then the waste heat flue gas after overheated is sent to evaporimeter high temperature section 4, by evaporimeter high temperature section 4 this waste heat flue gas is sent to sack cleaner 5 and continue dedusting, waste heat flue gas after the continuation dedusting sends to supercharging in the booster fan 6, waste heat flue gas after the supercharging sends to evaporimeter low-temperature zone 7, and evaporimeter low-temperature zone 7 sends to economizer 8 with this waste heat flue gas and discharges through chimney 9; Circulating pump 10 is delivered to cycle fluid 14 in the heat exchanger simultaneously, in heat exchanger, the heat of evaporimeter low-temperature zone 7 is passed to cycle fluid 14, produce high-pressure and high-temperature steam, this steam enters turbine 12 actings, the generating of drive generator, the exhaust of turbine 12 enters in the condenser 11, and out saturated liquid boosts through circulating pump 10 in the condenser 11, finishes whole circulation.
Claims (4)
1. the structure of a lime kiln residual heat recovery device, comprise the high-voltage electrostatic dust separator (2) that entering-dust mouth and the outlet of the waste heat flue (1) of limekiln (15) are conducted and are connected, it is characterized in that: the dust mouth of high-voltage electrostatic dust separator (2) is conducted with the smoke inlet of the middle superheater (3) of heat exchanger (16) and is connected, the exhanst gas outlet of evaporimeter high temperature section (4) is conducted with the entering-dust mouth of sack cleaner (5) and is connected in the heat exchanger (16), the dust mouth of sack cleaner (5) is conducted with the import of booster fan (6) and is connected, the outlet of booster fan (6) is conducted with the smoke inlet of the middle evaporimeter low-temperature zone (7) of heat exchanger (16) and is connected, in the heat exchanger (16) exhanst gas outlet of economizer (8) be connected with air intake with chimney (9) be connected 10 with circulating pump) outlet be conducted and be connected, the import of circulating pump (10) also is conducted with the venthole of condenser (11) and is connected, the steam ports that enters of condenser (11) also is conducted with the steam drain of turbine (13) and is connected, the air intake of turbine (13) is conducted with the working substance steam outlet of superheater (3) and is connected, and turbine (13) is connected with generator (12) axle; Generator (12), turbine (13), condenser (11), circulating pump (10) and heat exchanger (16) consist of the circulatory system, cycle fluid (14) in the described circulatory system is R113, and high-voltage electrostatic dust separator (2) and sack cleaner (5) consist of dust pelletizing system in addition.
2. the structure of lime kiln residual heat recovery device according to claim 1 is characterized in that: the high-voltage electrostatic dust separator of described dust pelletizing system (2) and sack cleaner (5) place respectively superheater (3) before and booster fan (6) afterwards.
3. according to claim 1 or the structure of lime kiln residual heat recovery device claimed in claim 2, it is characterized in that: the superheater of described heat exchanger (3) and evaporimeter high temperature section (4) are internal thread needle-tube or internal thread H type finned tube, and are furnished with dynamic soot blower.
4. according to claim 1 or the structure of lime kiln residual heat recovery device claimed in claim 2, it is characterized in that: evaporimeter low-temperature zone (7) and the economizer (8) of described heat exchanger are the internal thread spiral fin coil, and are furnished with special dynamic soot blower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101825366A CN102261852B (en) | 2011-06-30 | 2011-06-30 | Structure of lime kiln residual heat recovery device |
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| CN2011101825366A CN102261852B (en) | 2011-06-30 | 2011-06-30 | Structure of lime kiln residual heat recovery device |
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| CN102261852B true CN102261852B (en) | 2013-02-27 |
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| CN104002371B (en) * | 2014-04-24 | 2016-02-03 | 广东省建筑材料研究院 | A kind of production technology utilizing limekiln using waste heat from tail gas coproduction air-entrained concrete building block |
| FI128938B (en) | 2017-12-13 | 2021-03-31 | Valmet Technologies Oy | A method and a system for recovering thermal energy in a system comprising a chemical recovery boiler and a lime kiln |
| CN108771939A (en) * | 2018-07-03 | 2018-11-09 | 袁昭 | A kind of coal-burning boiler flue dust minimum discharge facility of efficient waste heat recycling |
| CN111174539A (en) * | 2018-11-13 | 2020-05-19 | 秦皇岛烟草机械有限责任公司 | Tobacco drying hot air circulating system |
| CN110683604B (en) * | 2019-10-30 | 2022-05-13 | 徐州工程学院 | Waste water utilization and flue gas emission reduction system based on solar energy |
| CN114152101B (en) * | 2021-12-09 | 2023-11-17 | 青阳县迎春炉料有限公司 | Energy-saving and consumption-reducing device for kiln and energy-saving and consumption-reducing method thereof |
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| JP3917911B2 (en) * | 2002-08-13 | 2007-05-23 | 三菱重工業株式会社 | Waste gasification system |
| CN100338424C (en) * | 2004-09-30 | 2007-09-19 | 中信重型机械公司 | Generating set system of simple low temperature waste heat from large size cement manufacture line in dry method, and technical process |
| CN201059880Y (en) * | 2007-07-13 | 2008-05-14 | 南京凯盛开能环保能源有限公司 | Pure middle-low-temperature waste heat power generation system of cement kiln |
| JP5242207B2 (en) * | 2008-03-18 | 2013-07-24 | 新日鉄住金エンジニアリング株式会社 | Method for separating and recovering carbon dioxide from blast furnace gas in blast furnace gas utilization process |
| CN101768652B (en) * | 2009-12-18 | 2011-05-18 | 南京凯盛开能环保能源有限公司 | Revolving furnace flue gas waste heat power generation system and method based on high-temperature heat carrier overheating |
| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN202166333U (en) * | 2011-06-30 | 2012-03-14 | 西安交通大学 | Structure of waste heat recovery device |
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