CN103090717A - Multistage gas heat exchange deduster - Google Patents
Multistage gas heat exchange deduster Download PDFInfo
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- CN103090717A CN103090717A CN2012102023723A CN201210202372A CN103090717A CN 103090717 A CN103090717 A CN 103090717A CN 2012102023723 A CN2012102023723 A CN 2012102023723A CN 201210202372 A CN201210202372 A CN 201210202372A CN 103090717 A CN103090717 A CN 103090717A
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Abstract
The invention relates to a multistage gas heat exchange deduster. According to the multistage gas heat exchange deduster, heat exchange and coarse dedusting are combined organically, so that the coarse dedusting of dust-containing flue gas is realized while heat exchange is performed. A heat exchanger of the multistage gas heat exchange deduster is a tubular heat exchanger; the dust-containing flue gas passes through thin pipes, and a heat exchange medium flows in peripheral thick pipes; due to the adoption of a laminar flow heat exchange principle, the heat-exchange efficiency is high, and abrasion on pipelines is small; a large-space ash bin is arranged on the lower part of the heat exchanger; and the sedimentation of coarsely-granular dust is realized by the change of the flow speed of dust-containing hot flue gas to fulfill the aim of coarse dedusting. According to the multistage gas heat exchange deduster, a graded gas heat exchange dedusting system is simple in structure, convenient to operate, small in occupied space, low in investment and energy-saving, and water is not needed to be used; and heat exchange can be performed by using different gas media according to actual requirements, and the high-temperature heat energy of the dust-containing flue gas is utilized fully.
Description
Technical field
The present invention relates to the deduster field, especially relate to a kind of multistage gas converting heat deduster.
Background technology
At present, heat exchange and dedusting are two covers systems independently separately.
Heat exchanger also claims heat exchanger, is used for the equipment that carries out heat exchange between the fluid of different temperatures.A kind of fluid temperature (F.T.) is higher, emits heat; One other fluid temperature is lower, absorbs heat.According to the heat transfer mode, heat exchanger is divided into the three major types such as dividing wall type, hybrid and heat accumulating type.Dividing wall type heat exchanger is most widely used in industry.
In actual use, dividing wall type heat exchanger has many types, mainly contains jacketed type exchanger, submerged coil heat exchanger, spray-type heat exchanger, double pipe heat exchanger, plate type heat exchanger, shell-and-tube heat exchanger, double tube plate heat exchanger (P type heat exchanger) etc.
Dedusting is divided into thick dedusting and two stages of smart dedusting.Dust-settling compartment is mainly adopted in thick dedusting, reduces the flow velocity of ash-laden gas, utilizes gravity principle to realize the crude particle dust natural subsidence, reduces the dustiness in flue gas.The essence dedusting generally adopts sack cleaner, ceramic multicyclone dust collector, electric cleaner etc. to carry out high-effective dust-removing, reaches environmental emission standard.
There is no at present the complete multi-stage heat exchanger that can dedusting in heat exchange of a cover.
Summary of the invention
Heat exchanger in multistage gas converting heat deduster of the present invention belongs to shell-and-tube heat exchanger, and shell-and-tube heat exchanger is simple in structure, and heat exchange efficiency is high.Deduster in heat-exchange dust remover of the present invention belongs to gravitational precipitator, and gravitational precipitator is also a kind of dedusting method of generally using in thick dedusting, and simple structure is to coarse granule ash fall successful.The present invention organically combines heat exchange and dedusting, realizes thick dedusting in heat exchange.The structural similarity of heat-exchange dust removers at different levels, every grade of heat-exchange dust remover is divided into three parts: top is for containing the heat dust gas air-inlet cavity, and the middle part is heat exchanging segment, and the bottom is air-out dedusting chamber.
The present invention is achieved through the following technical solutions:
the hot flue gas of dust-laden enters first-class heat exchanger through high-temperature flue gas entry, hot flue gas carries out heat exchange by first-class heat exchanger, need the cold air of heating to enter in the first-class heat exchanger lower cavity from one-level cold air entrance, hot flue gas after heat exchange exports out through the one-level hot gas, pass through secondary heat exchanger, carry out heat exchange in secondary heat exchanger, need the cold air of heating to enter in the secondary heat exchanger lower cavity from secondary cold air entrance, hot flue gas after heat exchange exports out through the secondary hot gas, in the process that this moment, high-temperature dust-containing flue gas flowed in heat exchanger tube, temperature progressively descends, flue gas flow rate sharply descends, and the bulky grain dust in flue gas can keep certain speed inertia, still move downward at a high speed, finally drop down onto the dust of the flue gas of the ash bucket bottom part of gathering dust, send to ash-discharging device by the ash bucket that gathers dust, granule dust in another part flue gas due to speed inertia a little less than, taken away by flue gas and proceed dust discharge, this part flue gas passes through three grades of heat exchangers, carry out heat exchange in three grades of heat exchangers, need the cold air of heating to enter in three grades of heat exchanger lower cavity from three grades of cold air entrances, hot flue gas after heat exchange exports out through three grades of hot gas, the temperature of the hot flue gas of this moment reduces, low-density low-temperature flue gas free from foreign meter, discharge from the low-temperature flue gas outlet, and another part dust is by sending to ash-discharging device by the ash bucket that gathers dust, dust in ash silo detects online by level-sensing device, when being accumulated to certain ash amount, system provides the ash discharge signal, directly entrucking outward transport.
Heat exchanging segment inside is many vertically arranged tubules, tubule upper end connection air-inlet cavity, connection air-out dedusting chamber, lower end.The hot flue gas of dust-laden passes through in tubule, and the space outside tubule is full of recuperated gas, and this structure is just opposite with conventional pipe heat exchanger.The flow direction of hot flue gas in tubule is all to flow from the top down, according to the difference of hot gas flow, selects different calibers, makes mobile the be in laminar condition of hot flue gas in tubule, and heat exchange is evenly carried out, and heat exchange efficiency is high, and dust is little to the wearing and tearing of pipeline.Recuperated gas enters from the bottom of heat exchanging segment, top out, because the inner tubule of heat exchanger gathers, recuperated gas need to pass the gap between many tubules, and stroke is long, and air-flow is in turbulent condition, gas molecule and tubule outer wall collision friction increased frequency, heat exchange efficiency is high.
The bottom that air-out dedusting chamber is is large ash silo, ash silo guarantees certain space more than high charge level, hot flue gas enters air-out dedusting chamber from tubule, when flue gas leaves the moment that tubule enters the dedusting chamber, because circulation area increases suddenly, gas flow rate obviously descends, and the dust granule in gas drop to rapidly under the effect of speed inertia bottom ash silo, realize separating of gas and bulky grain flue dust, reach the purpose of thick dedusting.
After being deposited on dust in the ash bucket of bottom, air-out dedusting chamber and reaching certain capacity, can regularly put ash with the ash discharging gear of crossing the bottom.Namely can directly use the dust-free loader entrucking, also can crude particle dust be delivered to the unified processing in appointed place by wind conducting pipe.
The invention has the advantages that:
A) heat exchange efficiency is high.In heat exchanging segment in the present invention, the hot flue gas of dust-laden is laminar condition in tubule, the heat exchanging segment uniformity of temperature profile; Flow in the cavity of recuperated gas outside tubule, be turbulent condition, heat exchange efficiency is high.
B) little to pipe wear.In heat exchanging segment in the present invention, the hot flow of flue gas of dust-laden in tubule is laminar condition, and dust is very little to the wearing and tearing of pipeline.Tubule is outward clean gas, although be turbulent condition, little on the impact of pipeline.
C) system's resistance is damaged little.Gas converting heat deduster of the present invention is the thick dedusting of dry method, and the hot flue gas of dust-laden is Physical temperature-lowering progressively, does not increase other any compositions.Along with big dust particle deposits gradually voluntarily, hot flue-gas temperature constantly reduces simultaneously, and the hot flue gas volume in pipeline reduces, dustiness reduces, add in pipeline and to be that laminar condition, the resistance of whole system damage obviously and to reduce, the performance requirement of the dedusting fan of back is decreased.This point is very important to the transformation of old factory.
D) occupied ground is little, flexible arrangement.Multistage gas converting heat deduster of the present invention is comprised of a plurality of independent heat-exchange dust removers, can arrange according to the place any combination.。
E) the dedusting fan wearing and tearing are little.The flue gas that dedusting fan is extracted out has reached environmental protection standard, effectively reduces dust to the wearing and tearing of blower fan.
F) efficiency of dust collection is high.Gas heat exchanger heat exchange the time, both reduced flue-gas temperature, dwindle flue gas volume, large space is provided again, effectively reduces flue gas flow rate, play the effect of gravitational dust collection, be conducive to the sedimentation of crude particle dust, reach the purpose of classification dedusting, obviously reduce the load of subordinate's essence dedusting.
G) power saving.The present invention does not have electric consumption in running.Owing to using the present invention, follow-up deduster load can reduce, and dedusting fan can reduce power, naturally economize on electricity.
H) effectively utilize the thermal resource of flue gas.Multistage gas heat exchanger of the present invention is independent separately, and every grade can be adopted different gas as heat transferring medium, is equivalent to save a large amount of energy for enterprise provides different preheating gas.
I) multistage gas converting heat dust pelletizing system equipment of the present invention is simple, easy to operate, safeguards, operating cost is low.
Description of drawings
Describe multistage gas converting heat dust pelletizing system of the present invention in detail in conjunction with following accompanying drawing.
Fig. 1 is single-stage gas converting heat deduster schematic diagram;
Fig. 2 is according to multistage gas converting heat dust pelletizing system allocation plan of the present invention (take three grades of heat exchange as example).
The specific embodiment
With reference to Fig. 1, Fig. 1 is according to single-stage gas converting heat dust pelletizing system allocation plan of the present invention.Wherein, 1-cold air entrance, 2-hot gas outlet, 3-support, 4-dust-laden hot air distribution chamber, 5-contains the heat dust gas entrance, 6-heat exchanger tube, 7-deflection plate, 8-dividing plate, 9-air-out dedusting chamber, the 10-air outlet, 11-ash discharge equipment, 12-upper perforated plate, 13-abrasionproof pipe, 14-lower perforated plate.
the hot flue gas of dust-laden enters dust-laden hot air distribution chamber 4 through hot smoke inlet 5, the preliminary air-flow of adjusting of hot flue gas warp in distribution cavity, evenly enter heat exchanger tube 6, support 3 is used for supporting whole heat exchanger, heat exchanging segment inside is many vertically arranged tubules, be provided with dividing plate 8 in the middle of heat exchanger tube 6, be provided with upper perforated plate 12 in the upper end, lower perforated plate 14 is set in the lower end, for increasing anti-wear performance, in heat exchanger tube 6, abrasionproof pipe 13 can be set, hot flue gas carries out heat exchange by the hot flue gas of heat exchanger tube 6 and cold air, then enter following air-out dedusting chamber 9, enter the rear portion pipeline by air outlet 10, need the cold air of heating to enter in the heat exchanger lower cavity from cold air entrance 1, heat by heat exchanger tube is heated, return into the heat exchanger upper cavity through deflection plate 7, continuation is heated by the heat exchanger tube high temperature section, final heated gas enters the hot gas pipeline from hot gas outlet 2, be delivered to user side, in the process that high-temperature dust-containing flue gas flows in heat exchanger tube, temperature progressively descends, speed is slowed down gradually, the retaining layer stream mode, like this, the souring of the dust heat exchanging inside pipe wall in gas is very little, the inner wall abrasion amount of heat exchanger tube is minimum, improved widely the service life of heat exchanger tube.Flue gas after cooling enters the moment in air-out dedusting chamber 9 from the heat exchanger tube lower end; because the space in air-out dedusting chamber 9 is enough large; flue gas flow rate sharply descends; and the bulky grain dust in flue gas can keep certain speed inertia, still moves downward at a high speed, finally drops down onto 9 bottoms, air-out dedusting chamber; moving with not arrheaing of flue gas; the dust of 9 bottoms, air-out dedusting chamber accumulates gradually, when a certain amount of, by 11 outputs of ash discharge equipment.Flue gas enters the rear portion flue by air outlet 10, the granule dust in flue gas due to speed inertia a little less than, taken away by flue gas.Therefore, this heat-exchange dust remover is suitable for the relatively high high-temperature flue gas of big dust particle content, and the molecule in flue gas also needs follow-up cleaner to process.Owing to having removed the big dust particle in the flue gas at this, just can significantly alleviate the load of follow-up deduster.Due to the reduction of flue-gas temperature, can make the cost of manufacture decrease of follow-up deduster.
According to different flue-gas temperatures and dust parameter, can carry out the combination in multi-stage heat exchanger and multistage dedusting chamber, obtain multi-form multi-stage heat exchanger deduster structure.The multi-stage heat exchanger deduster of Fig. 2 for producing according to the present invention is comprised of three grades of heat exchangers and two-step filter.Wherein, 1 '-high-temperature flue gas entry, 2 '-first-class heat exchanger, the outlet of 3 '-one-level hot gas, 4 '-one-level cold air entrance, 5 '-secondary heat exchanger, the outlet of 6 '-secondary hot gas, 7 '-secondary cold air entrance, 8 '-flue, 9 '-ash bucket gathers dust, 10 '-ash-discharging device, the outlet of 11 '-low-temperature flue gas, 12 '-three grades of heat exchangers, 13 '-three grades of cold air entrances, 14 '-three grades of hot gas outlets.
the hot flue gas of dust-laden enters first-class heat exchanger 2 ' through high-temperature flue gas entry 1 ', hot flue gas carries out heat exchange by first-class heat exchanger 2 ', need the cold air of heating to enter in first-class heat exchanger 2 ' lower cavity from one-level cold air entrance 4 ', hot flue gas after heat exchange through one-level hot gas outlet 3 ' out, pass through secondary heat exchanger 5 ', carry out heat exchange in secondary heat exchanger 5 ', need the cold air of heating to enter in secondary heat exchanger 5 ' lower cavity from secondary cold air entrance 7 ', hot flue gas after heat exchange through secondary hot gas outlet 6 ' out, in the process that this moment, high-temperature dust-containing flue gas flowed in heat exchanger tube, temperature progressively descends, flue gas flow rate sharply descends, and the bulky grain dust in flue gas can keep certain speed inertia, still move downward at a high speed, finally drop down onto the dust of the flue gas of ash bucket 9 ' the bottom part of gathering dust, ash bucket 9 ' is sent to ash-discharging device 10 ' by gathering dust, granule dust in another part flue gas due to speed inertia a little less than, taken away by flue gas and proceed dust discharge, this part flue gas passes through three grades of heat exchangers 12 ', carry out heat exchange in three grades of heat exchangers 12 ', need the cold air of heating to enter in three grades of heat exchanger 12 ' lower cavity from three grades of cold air entrances 13 ', hot flue gas after heat exchange through three grades of hot gas outlets 14 ' out, the temperature of the hot flue gas of this moment reduces, low-density low-temperature flue gas free from foreign meter, discharge from low-temperature flue gas outlet 11 ', and another part dust is by sending to ash-discharging device 10 ' by the ash bucket 9 ' that gathers dust.Dust in ash silo detects online by level-sensing device, and signal enters the PLC system, and when being accumulated to certain ash amount, system provides the ash discharge signal, and directly entrucking outward transport also can be delivered to the appointed place unification by wind conducting pipe and process.
Multistage gas converting heat deduster heat exchange efficiency of the present invention is high, and is little to equipment attrition, both taken full advantage of the thermal resource of high-temperature flue gas, completing again the sedimentation of big dust particle collects, improving efficiency of dust collection, meet the industrial policy that national energy-saving reduces discharging, is following developing direction.Small investment of the present invention, equipment are simple, easy to operate, maintenance and operating cost low.
Above system configuration of the present invention is set forth, but the embodiment that the present invention introduces in this not conditional intention, in the scope that does not deviate from purport of the present invention, the present invention can have multiple variation and modification.
Claims (7)
1. multistage gas converting heat deduster, include high-temperature flue gas entry, first-class heat exchanger, secondary heat exchanger, flue, ash bucket gathers dust, ash-discharging device, three grades of heat exchangers, wherein the hot flue gas of dust-laden enters first-class heat exchanger through high-temperature flue gas entry, hot flue gas carries out heat exchange by first-class heat exchanger, need the cold air of heating to enter in the first-class heat exchanger lower cavity from one-level cold air entrance, hot flue gas after heat exchange exports out through the one-level hot gas, pass through secondary heat exchanger, carry out heat exchange in secondary heat exchanger, need the cold air of heating to enter in the secondary heat exchanger lower cavity from secondary cold air entrance, hot flue gas after heat exchange exports out through the secondary hot gas, in the process that this moment, high-temperature dust-containing flue gas flowed in heat exchanger tube, temperature progressively descends, flue gas flow rate sharply descends, and the bulky grain dust in flue gas can keep certain speed inertia, still move downward at a high speed, finally drop down onto the dust of the flue gas of the ash bucket bottom part of gathering dust, send to ash-discharging device by the ash bucket that gathers dust, granule dust in another part flue gas due to speed inertia a little less than, taken away by flue gas and proceed dust discharge, this part flue gas passes through three grades of heat exchangers, carry out heat exchange in three grades of heat exchangers, need the cold air of heating to enter in three grades of heat exchanger lower cavity from three grades of cold air entrances, hot flue gas after heat exchange exports out through three grades of hot gas, the temperature of the hot flue gas of this moment reduces, low-density low-temperature flue gas free from foreign meter, discharge from the low-temperature flue gas outlet, and another part dust is by sending to ash-discharging device by the ash bucket that gathers dust, dust in ash silo detects online by level-sensing device, when being accumulated to certain ash amount, system provides the ash discharge signal, directly entrucking outward transport.
2. multistage gas converting heat deduster as claimed in claim 1 wherein is provided with dividing plate in the middle of heat exchanger tube, be provided with upper perforated plate in the heat exchanger tube upper end, in the heat exchanger tube lower end, lower perforated plate is set.
3. multistage gas converting heat deduster as claimed in claim 1, wherein for increasing anti-wear performance, can arrange the abrasionproof pipe in heat exchanger tube.
4. multistage gas converting heat deduster as claimed in claim 1, wherein heat exchanger tube inside is many vertically arranged tubules.
5. multistage gas converting heat deduster as described in claim 1-4, wherein the heat exchanger shape can be cylinder, cylindroid, square etc.
6. multistage gas converting heat deduster as described in claim 1-5, wherein front 1～2 grade of heat-exchange dust remover need adopt the alloy material, and the subsequent stages heat-exchange dust remover can adopt the common metal material.
7. the dust in multistage gas converting heat deduster as described in claim 1-6, wherein said ash silo can deliver to by wind conducting pipe that the appointed place is unified processes.
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| CN2012102023723A CN103090717A (en) | 2012-06-19 | 2012-06-19 | Multistage gas heat exchange deduster |
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| CN2012102023723A CN103090717A (en) | 2012-06-19 | 2012-06-19 | Multistage gas heat exchange deduster |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103463965A (en) * | 2013-09-03 | 2013-12-25 | 上海晓清环保科技有限公司 | Flue gas desulfurization and dust removal equipment of low-temperature circulating fluidized bed |
| CN108374723A (en) * | 2017-01-31 | 2018-08-07 | 安萨尔多能源瑞士股份公司 | Heat exchanger for gas-turbine unit |
| CN109340782A (en) * | 2018-11-27 | 2019-02-15 | 湖北金炉节能股份有限公司 | A kind of solid sludges scrap incinerator |
| CN112774361A (en) * | 2020-12-31 | 2021-05-11 | 成都易态科技有限公司 | Heat exchange dust removing device |
| CN112807891A (en) * | 2020-12-31 | 2021-05-18 | 成都易态科技有限公司 | Heat exchange dust removal structure, heat exchange dust removal device and high-temperature dust-containing gas treatment method |
| CN115400517A (en) * | 2022-08-15 | 2022-11-29 | 南京科赫科技有限公司 | High-temperature flue gas dust removal system and process |
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| CN87204377U (en) * | 1987-06-27 | 1988-01-20 | 湘潭市锅炉厂 | High efficient low resistance air preheater |
| CN102424887A (en) * | 2011-11-30 | 2012-04-25 | 许广春 | Gas drying type dust removal system of converter |
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- 2012-06-19 CN CN2012102023723A patent/CN103090717A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204377U (en) * | 1987-06-27 | 1988-01-20 | 湘潭市锅炉厂 | High efficient low resistance air preheater |
| CN102424887A (en) * | 2011-11-30 | 2012-04-25 | 许广春 | Gas drying type dust removal system of converter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103463965A (en) * | 2013-09-03 | 2013-12-25 | 上海晓清环保科技有限公司 | Flue gas desulfurization and dust removal equipment of low-temperature circulating fluidized bed |
| CN108374723A (en) * | 2017-01-31 | 2018-08-07 | 安萨尔多能源瑞士股份公司 | Heat exchanger for gas-turbine unit |
| CN109340782A (en) * | 2018-11-27 | 2019-02-15 | 湖北金炉节能股份有限公司 | A kind of solid sludges scrap incinerator |
| CN109340782B (en) * | 2018-11-27 | 2024-04-16 | 湖北金炉节能股份有限公司 | Solid sludge waste incinerator |
| CN112774361A (en) * | 2020-12-31 | 2021-05-11 | 成都易态科技有限公司 | Heat exchange dust removing device |
| CN112807891A (en) * | 2020-12-31 | 2021-05-18 | 成都易态科技有限公司 | Heat exchange dust removal structure, heat exchange dust removal device and high-temperature dust-containing gas treatment method |
| CN115400517A (en) * | 2022-08-15 | 2022-11-29 | 南京科赫科技有限公司 | High-temperature flue gas dust removal system and process |
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Application publication date: 20130508 |