CN202166333U - Structure of waste heat recovery device - Google Patents
Structure of waste heat recovery device Download PDFInfo
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- CN202166333U CN202166333U CN2011202255933U CN201120225593U CN202166333U CN 202166333 U CN202166333 U CN 202166333U CN 2011202255933 U CN2011202255933 U CN 2011202255933U CN 201120225593 U CN201120225593 U CN 201120225593U CN 202166333 U CN202166333 U CN 202166333U
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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 utility model provides the structure of a waste heat recovery device, which comprises a limekiln waste heat flue gas outlet, a dust removal system, a booster fan, a circulation system and a chimney mutually communicated with each other. Due to the adoption of the above structure of a waste heat recovery device, the problems of low-temperature corrosion caused by deposited ashes in limekiln flue gas and the low heat exchange coefficient of the internal and external walls of the tube bank of a heat exchanger due to the adoption of a low-smoke heat exchanger and a low-boiling working medium are solved. Meanwhile, limekiln flue gas waste heat is effectively recycled and converted into electric energy, so that the energy utilization rate is improved and the environmental pollution and energy waste are reduced. The structure of the waste heat recovery device also has the advantages of low investment, simple structure and stable operation.
Description
Technical field
The utility model belongs to industrial furnace residual heat and utilizes technical field, is specifically related to a kind of structure of waste-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 practice thrift the energy resource consumption of China greatly, reduce the discharging of pollutant simultaneously.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.With the limekiln is example, and 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 big, can reach 20mm.This part fume afterheat is effectively utilized, can significantly reduce energy waste, increase the economy and the feature of environmental protection in limekiln.The scientific technological advance thinking of China, process industry such as primary study exploitation metallurgy, chemical industry and transportation etc. are the power-saving technology and the equipment in highly energy-consuming field mainly.
At present, domesticly relate generally to heat supply and generating about the limekiln UTILIZATION OF VESIDUAL HEAT IN.Utilize conduction oil as circulatory mediator, reclaim heat energy; Utilize the waste heat heating 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 limekiln afterheat generating system.But; Because the flow of limekiln waste heat, temperature, dustiness are in constantly changing; Limekiln outlet flue gas particle caking property is strong, and the dust-laden grain graininess is big, and has stronger corrosivity; The limekiln waste heat gets into the 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; Adopt the water vapour Rankine cycle uneconomical, need to select low-boiling organic working medium, still; The coefficient of heat transfer of low boiling organic working medium and inside pipe wall must improve the coefficient of heat transfer of 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 that with water is the 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 UTILIZATION OF VESIDUAL HEAT IN effect of Technological Economy property.
Summary of the invention
In order to overcome the deficiency that above-mentioned prior art exists; The purpose of the utility model is to provide a kind of structural configuration of waste-heat recovery device, has solved cold end corrosion that limekiln flue gas dust stratification causes and because of adopting low cigarette temperature to change the heat exchanger tube inside and outside wall coefficient of heat transfer problem of lower that causes with low boiling working fluid, and can effective recycling limekiln fume afterheat; Be converted into electric energy; Improve energy utilization rate, reduce environmental pollution and energy waste, it is little to have an investment; Characteristics simple in structure, stable.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of structure of waste-heat recovery device; Comprise the high-voltage electrostatic dust separator 2 that the 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 smoke inlet of sack cleaner 5 and is connected in the heat exchanger 16; The exhanst gas outlet of sack cleaner 5 is conducted with the import of booster fan 6 and is connected, and 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, and the exhanst gas outlet of economizer 8 is conducted with the outlet of chimney 9 and circulating pump 10 respectively with air intake and is connected in the heat exchanger 16; The import of circulating pump 10 also is conducted with the venthole of condenser 11 and is connected; The steam ports of going into of condenser 11 also is conducted with the steam drain of turbine 13 and is connected, and 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 12 in generator; Generator 12, turbine 13, condenser 11, circulating pump 10 and heat exchanger 16 constitute the circulatory system, and the cycle fluid 14 in the said circulatory system is R113, and high-voltage electrostatic dust separator 2 and sack cleaner 5 constitute 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 and the evaporimeter high temperature section 4 of said heat exchanger are internal thread aciculiform pipe or internal thread H type finned tube, and are furnished with dynamic soot blower.
The evaporimeter low-temperature zone 7 and the economizer 8 of said heat exchanger are the internal thread spiral fin coil, and are furnished with special dynamic soot blower.
Because the cycle fluid of the utility model adopts R113, it is not flammable that this working medium does not have 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 utility model selects riffled tube to improve the coefficient of heat transfer of 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 is strong, the dust-laden grain graininess is big, easily dust stratification; Therefore; The utility model 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 preparatory dedusting to flue gas, reduces the superficial dust of high temperature section heat exchanger 3,4; 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 select the cast of augmentation of heat transfer to improve the fume side coefficient of heat transfer.Superheater 3 is selected strong aciculiform pipe of anti-dust stratification ability or H type finned tube for use with evaporimeter high temperature section 4; Evaporimeter low-temperature zone 7 adopts spiral fin coil with economizer 8; 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 is more abominable with evaporimeter high temperature section 4 working environments, 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 big, and hydrophily is strong, and dust is prone to the dust stratification that hardens after the moisture absorption, therefore adopts strong aciculiform pipe of anti-dust stratification ability or H type finned tube; Simultaneously, install reasonably dynamically soot blower additional, guarantee that its heating surface heat exchange is in operation and be in good state; This utility model 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 of 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 a series of problems on the low side; The 2.5MW TRT that reclaims 1000t/d lime rotary kiln waste heat with a cover is an example; According to utilizing calculating in 7200 hours year; Year delivery 1,656 ten thousand kwh (power station is from power consumption rate 8%) calculate 993.6 ten thousand yuan of the creations of value according to 0.6 yuan/kwh of electricity price; Practice thrift 5700 tons in mark coal year, reduce 1.63 ten thousand tons of CO2 emissions.Have remarkable economical, society and environmental benefit; The structural configuration technology of this waste-heat recovery device can promote the use of 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 the operation principle structural representation of the utility model, and wherein arrow is represented flow direction.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done more detailed explanation.
Shown in accompanying drawing; The structure of waste-heat recovery device; Comprise the high-voltage electrostatic dust separator 2 that the 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, and 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, and 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 conducted with the outlet of chimney 9 and circulating pump 10 respectively with air intake and is connected in the heat exchanger 16, and the import of circulating pump 10 also is conducted with the venthole of condenser 11 and is connected, and the steam ports of going into 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 12 in generator; Generator 12, turbine 13, condenser 11, circulating pump 10 and heat exchanger 16 constitute the circulatory system, and the cycle fluid 14 in the said circulatory system is R113, and high-voltage electrostatic dust separator 2 and sack cleaner 5 constitute 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 and the evaporimeter high temperature section 4 of said heat exchanger are internal thread aciculiform pipe or internal thread H type finned tube, and are furnished with dynamic soot blower.The evaporimeter low-temperature zone 7 and the economizer 8 of said heat exchanger are the internal thread spiral fin coil, and are furnished with special dynamic soot blower.
The operation principle of the utility model 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 with the waste heat flue gas after the dedusting send 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, and the 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 gets into turbine 12 actings; Drive generator for electricity generation; The exhaust of turbine 12 gets in the condenser 11, and the saturated liquid that comes out in the condenser 11 boosts through circulating pump 10, accomplishes whole circulation.
Claims (4)
1. the structure of a waste-heat recovery device; Comprise the high-voltage electrostatic dust separator (2) that the 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; The exhanst gas outlet of economizer (8) is conducted with the outlet of chimney (9) and circulating pump (10) respectively with air intake and is connected in the heat exchanger (16), and the import of circulating pump (10) also is conducted with the venthole of condenser (11) and is connected, and the steam ports of going into 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) constitute the circulatory system, and the cycle fluid (14) in the said circulatory system is R113, and high-voltage electrostatic dust separator (2) and sack cleaner (5) constitute dust pelletizing system in addition.
2. the structural configuration of waste-heat recovery device according to claim 1 is characterized in that: 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 the structural configuration of claim 1 or the described waste-heat recovery device of claim 2, it is characterized in that: superheater of said heat exchanger (3) and evaporimeter high temperature section (4) are internal thread aciculiform pipe or internal thread H type finned tube, and are furnished with dynamic soot blower.
4. according to the structural configuration of claim 1 or the described waste-heat recovery device of claim 2, it is characterized in that: the evaporimeter low-temperature zone (7) and the economizer (8) of said heat exchanger are the internal thread spiral fin coil, and are furnished with special dynamic soot blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202255933U CN202166333U (en) | 2011-06-30 | 2011-06-30 | Structure of waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202255933U CN202166333U (en) | 2011-06-30 | 2011-06-30 | Structure of waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202166333U true CN202166333U (en) | 2012-03-14 |
Family
ID=45802152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202255933U Withdrawn - After Issue CN202166333U (en) | 2011-06-30 | 2011-06-30 | Structure of waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202166333U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261852A (en) * | 2011-06-30 | 2011-11-30 | 西安交通大学 | Structure of lime kiln residual heat recovery device |
| CN114923339A (en) * | 2022-03-22 | 2022-08-19 | 昆明理工大学 | Medium-low temperature flue gas de-whitening, waste heat and water resource recovery system |
-
2011
- 2011-06-30 CN CN2011202255933U patent/CN202166333U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261852A (en) * | 2011-06-30 | 2011-11-30 | 西安交通大学 | Structure of lime kiln residual heat recovery device |
| CN114923339A (en) * | 2022-03-22 | 2022-08-19 | 昆明理工大学 | Medium-low temperature flue gas de-whitening, waste heat and water resource recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120314 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |