CN103940083A - Heat exchange type hot-blast stove with flue gas recirculation device - Google Patents
Heat exchange type hot-blast stove with flue gas recirculation device Download PDFInfo
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- CN103940083A CN103940083A CN201410108954.4A CN201410108954A CN103940083A CN 103940083 A CN103940083 A CN 103940083A CN 201410108954 A CN201410108954 A CN 201410108954A CN 103940083 A CN103940083 A CN 103940083A
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- flue gas
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to the technical field of thermal energy, in particular to a heat exchange type hot-blast stove with a flue gas recirculation device. The heat exchange type hot-blast stove with the flue gas recirculation device is widely applied to the drying industry and the thermal energy industry, and is particularly suitable for the field of drying and heat supplying at constant low temperature. According to the heat exchange type hot-blast stove with the flue gas recirculation device, when high-temperature flue gas exceeds a set upper limit temperature, the opening degree of an automatic wind regulation valve in a circulation system is increased according to an electrically controlled instruction, the increased opening degree enables the wind return quantity to be increased, so that the temperature of the high-temperature flue gas is reduced, and the problem that overheating damage occurs due to the fact that the high-temperature flue gas exceeds the limiting temperature tolerated by the materials of a heat exchanger is fundamentally avoided, secondary heat exchange of low-temperature flue gas after circulation through the heat exchanger is a waste heat recovery process, and therefore the effects of energy conservation and consumption reduction are well achieved.
Description
Technical field
The present invention relates to heat energy technical field, spy relates to a kind of heat exchange type hot-blast stove with smoke circulating device, and dry, heat energy industry that the present invention is widely used in is particularly suitable for the dry heating field of constant low temperature.
Background technology
Existing, especially for the equipment of microorganism formulation low temperature drying heat supply, shortcoming is: one, the automaticity of hot-blast stove is low, temperature is uncontrollable, product quality can not get ensure; Its two, the heat exchanger of conventional hot-blast stove is not because there is no the protection of smoke circulating system, the long-time state in hot operation, service life is not long; Its three, conventional heat supply adopts the mode of steam heating in addition, but the high production cost that causes of energy consumption is too high, adopts the heat exchange type hot-blast stove heat supply with smoke circulating device, with boiler heat supplying comparison, in the situation that EAT is identical, can save energy more than 15%.
Summary of the invention
For the deficiency of background technology, the invention provides a kind of heat exchange type hot-blast stove with smoke circulating device, when high-temperature flue gas exceedes the temperature that the upper limit arranges, automatic air regulating valve in the circulatory system will increase aperture according to automatically controlled instruction, thereby aperture increase has just strengthened the temperature of return air amount reduction high-temperature flue gas, fundamentally avoid high-temperature flue gas and crossed cause thermal damage because exceeding the limiting temperature of heat exchanger materials tolerance, the low-temperature flue gas secondary looping back is exactly the operation of a waste heat recovery by heat exchanger heat exchange, play an extraordinary energy-saving and cost-reducing effect.So design has broken through a Pinch technology difficult problem for heat exchange type heat exchanger for hot-blast stove hot operation defect in the past.
Technical scheme of the present invention is: a kind of heat exchange type hot-blast stove with smoke circulating device, comprise the combustion furnace for fuel combustion reaction, for the heat exchanger of thermal energy exchange, be used for the self-induced scrubber of flue gas ash removal and the chimney for fume emission, wherein, combustion furnace passes to heat exchanger by preposition deduster by hot-air, heat exchanger exit connects respectively auto-excitation type and connects deduster and automatic air regulating valve, self-induced scrubber is connected with chimney by air-introduced machine, it is characterized in that: it also comprises smoke circulating system, smoke circulating system comprises automatic air regulating valve, flue gas recirculation pipeline, flue gas recirculation blower fan, preposition deduster, high-temperature flue gas temperature probe, electric-control system, hot blast temperature probe, wherein automatic air regulating valve one end is connected with self-induced scrubber, the other end and flue gas recirculation blower fan, flue gas recirculation blower fan re-enters flue gas in deduster by flue gas recirculation pipeline, high-temperature flue gas temperature probe is placed on the air outlet of preposition deduster, hot blast temperature probe is placed on heat exchanger wind outlet, for measuring the temperature of heat exchanger air-out.
The heat exchange type hot-blast stove with smoke circulating device as above, is characterized in that: described electric-control system gathers high-temperature flue gas temperature probe signal and according to this Signal Regulation automatic air regulating valve.
The heat exchange type hot-blast stove with smoke circulating device as above, is characterized in that: it also comprises furnace bottom air blast and heat exchanger air blast, and described furnace bottom air blast is used for combustion furnace pucking wind, and described heat exchanger air blast is for heat exchanger air blast.
Technique effect of the present invention is: greatly increased the service life of heat exchange type hot-blast stove, broken through the technical barrier that heat exchange type heat exchanger for hot-blast stove cannot be continuously long-running in the past; Reduce energy consumption simultaneously and improved production efficiency.
Brief description of the drawings
Fig. 1 asks invention overall structure schematic diagram.
Detailed description of the invention
Description of reference numerals: 1-combustion furnace, 2-heat exchanger, 3-deduster, 4-chimney, 5-air-introduced machine, 6-circulating fan, 7-furnace bottom air blast, 8-heat exchanger air blast, 9-deduster, 10-high-temperature flue gas temperature probe, 11-hot blast temperature probe, 12-flue gas recirculation pipeline, 13-electric-control system, 14-automatic air regulating valve
Below in conjunction with accompanying drawing to be originally invention be described further.
As shown in Figure 1, the heat exchange type hot-blast stove with smoke circulating device of the present invention, it comprises for the combustion furnace 1 of fuel combustion reaction, for the heat exchanger 2 of thermal energy exchange, for the self-induced scrubber 3 of flue gas ash removal with for the chimney 4 of fume emission; Combustion furnace 1 passes to heat exchanger 2 by preposition deduster 9 by hot-air, and heat exchanger 2 exports and connects respectively auto-excitation type and connect deduster 3 and automatic air regulating valve 14.Self-induced scrubber 3 is connected with chimney 4 by air-introduced machine 5.
As shown in Figure 1, smoke circulating system of the present invention comprises automatic air regulating valve 14, flue gas recirculation pipeline 12, flue gas recirculation blower fan 6, preposition deduster 9, high-temperature flue gas temperature probe 10, electric-control system 13, hot blast temperature probe 11, wherein automatic air regulating valve 14 one end are connected with self-induced scrubber 3, the other end and flue gas recirculation blower fan 6, flue gas recirculation blower fan 6 re-enters flue gas in deduster 9 by flue gas recirculation pipeline 12; High-temperature flue gas temperature probe 10 is placed on the air outlet of preposition deduster 9; Hot blast temperature probe 11 is placed on heat exchanger 2 wind outlets, for measuring the temperature of heat exchanger 2 air-out.Electric-control system 13 of the present invention compares analysis for the PLC control system of automatic control by the data that 10 collection transmission are returned to high-temperature flue gas temperature probe, when high-temperature flue gas exceedes the temperature of limiting, while likely injuring heat exchanger safe operation, electric-control system 13 will send instruction, automatic air regulating valve 14 regulates the aperture of ventilation automatically according to the instruction of electric-control system 13, thereby regulates the temperature of high-temperature flue gas.
As shown in Figure 1, the present invention also comprises furnace bottom air blast 7 and heat exchanger air blast 8, furnace bottom air blast 7, for to combustion furnace 1 furnace bottom air blast, ensures that the combustion reaction of fuel (coal or biomass fuel) in combustion furnace has sufficient oxygen supply and fully burning, avoids waste.Heat exchanger air blast 8 is for heat exchanger 2 air blast, and the effect of heat exchanger air blast 8 is for heat energy user provides enough air quantity, overcomes the resistance of heat exchanger itself simultaneously.
Operation principle of the present invention is: the high-temperature flue gas of the high-temperature flue gas that fuel produces in the interior burning of combustion furnace 1 after by preposition smoke duster 9 dedustings enters into heat exchanger 2 and carry out abundant heat exchange, the clean air of being sent to heat exchanger by cold air air blast 8 through heat exchanger 2 heat exchange obtain clean hot-air and deliver to user side.Hot blast through heat exchanger 2 is lowered the temperature because having exchanged energy.A flue gas part after cooling enters into be sent into chimney 4 by smoke induced draught fan 5 after the interior dust-removal and desulfurizing of auto-excitation type granite duster 3 is processed and discharges.Another part low-temperature flue gas is sent into the front end of preposition deduster 9 through flue gas recirculation pipeline 12 by flue gas recirculation blower fan 6 through automatic air regulating valve 14.The high-temperature flue gas entry end of heat exchanger 2 is provided with high-temperature flue gas temperature probe 10, the low-temperature flue gas port of export of heat exchanger 2 arranges hot blast temperature probe 11, when gathering, hot blast temperature probe 11 feeds back to the data of automatic control circuit 13 lower than the lower limit temperature of its setting, illustrate that heat exchanger heat exchange is insufficient, robot control system(RCS) 13 is just sent alarm command, remind operating personnel to check the reason that heat-exchange system air-out exceedes, avoid energy loss.When high-temperature flue gas is by the measurement temperature of high-temperature flue gas temperature probe 10, exceed the ceiling temperature that automatic control circuit 13 arranges, automatic control circuit 13 will send signal command automatic air regulating valve 14 and increase aperture increasing return air amount, reduces the temperature of high-temperature flue gas.
Claims (3)
1. one kind has the heat exchange type hot-blast stove of smoke circulating device, comprise the combustion furnace for fuel combustion reaction, for the heat exchanger of thermal energy exchange, be used for the self-induced scrubber of flue gas ash removal and the chimney for fume emission, wherein, combustion furnace passes to heat exchanger by preposition deduster by hot-air, heat exchanger exit connects respectively auto-excitation type and connects deduster and automatic air regulating valve, self-induced scrubber is connected with chimney by air-introduced machine, it is characterized in that: it also comprises smoke circulating system, smoke circulating system comprises automatic air regulating valve, flue gas recirculation pipeline, flue gas recirculation blower fan, preposition deduster, high-temperature flue gas temperature probe, electric-control system, hot blast temperature probe, wherein automatic air regulating valve one end is connected with self-induced scrubber, the other end and flue gas recirculation blower fan, flue gas recirculation blower fan re-enters flue gas in deduster by flue gas recirculation pipeline, high-temperature flue gas temperature probe is placed on the air outlet of preposition deduster, hot blast temperature probe is placed on heat exchanger wind outlet, for measuring the temperature of heat exchanger air-out.
2. the heat exchange type hot-blast stove with smoke circulating device as claimed in claim 1, is characterized in that: described electric-control system gathers high-temperature flue gas temperature probe signal and according to this Signal Regulation automatic air regulating valve.
3. the heat exchange type hot-blast stove with smoke circulating device as claimed in claim 1 or 2, it is characterized in that: it also comprises furnace bottom air blast and heat exchanger air blast, described furnace bottom air blast is used for combustion furnace pucking wind, and described heat exchanger air blast is for heat exchanger air blast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410108954.4A CN103940083B (en) | 2014-03-24 | 2014-03-24 | A kind of heat exchange type hotblast stove with smoke circulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410108954.4A CN103940083B (en) | 2014-03-24 | 2014-03-24 | A kind of heat exchange type hotblast stove with smoke circulating device |
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| Publication Number | Publication Date |
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| CN103940083A true CN103940083A (en) | 2014-07-23 |
| CN103940083B CN103940083B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410108954.4A Expired - Fee Related CN103940083B (en) | 2014-03-24 | 2014-03-24 | A kind of heat exchange type hotblast stove with smoke circulating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028569A (en) * | 2018-09-09 | 2018-12-18 | 无锡博众热能环保设备有限公司 | A kind of flue gas complete alternation hot-blast stove |
| CN115403415A (en) * | 2021-05-26 | 2022-11-29 | 王树岩 | Aeration system and method for promoting fermentation and improving fertilizer efficiency |
| CN117232273A (en) * | 2023-09-14 | 2023-12-15 | 兰州泰得燃烧设备工程有限公司 | Circulating hot air system based on low-temperature area smoke exhaust technology |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518664A (en) * | 1974-07-11 | 1976-01-23 | Nippon Kogei Kogyo Co | Netsupukansohoho oyobi sochi |
| CN2200148Y (en) * | 1993-04-17 | 1995-06-07 | 天津市蓟县能源研究所 | Circulating hot pipe hot-air stove |
| CN2929612Y (en) * | 2005-12-30 | 2007-08-01 | 武汉景弘环保科技有限公司 | Bag type dust removing system for drying device |
| CN200949914Y (en) * | 2006-09-28 | 2007-09-19 | 天津新技术产业园区天博科工贸有限公司 | Automatic temperature controlled fire coal hot air apparatus |
| CN204100575U (en) * | 2014-03-24 | 2015-01-14 | 湖北工业大学 | A kind of heat exchange type hot-blast stove with smoke circulating device |
-
2014
- 2014-03-24 CN CN201410108954.4A patent/CN103940083B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518664A (en) * | 1974-07-11 | 1976-01-23 | Nippon Kogei Kogyo Co | Netsupukansohoho oyobi sochi |
| CN2200148Y (en) * | 1993-04-17 | 1995-06-07 | 天津市蓟县能源研究所 | Circulating hot pipe hot-air stove |
| CN2929612Y (en) * | 2005-12-30 | 2007-08-01 | 武汉景弘环保科技有限公司 | Bag type dust removing system for drying device |
| CN200949914Y (en) * | 2006-09-28 | 2007-09-19 | 天津新技术产业园区天博科工贸有限公司 | Automatic temperature controlled fire coal hot air apparatus |
| CN204100575U (en) * | 2014-03-24 | 2015-01-14 | 湖北工业大学 | A kind of heat exchange type hot-blast stove with smoke circulating device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028569A (en) * | 2018-09-09 | 2018-12-18 | 无锡博众热能环保设备有限公司 | A kind of flue gas complete alternation hot-blast stove |
| CN109028569B (en) * | 2018-09-09 | 2024-01-05 | 无锡博众热能环保设备有限公司 | Flue gas full-cycle hot-blast stove |
| CN115403415A (en) * | 2021-05-26 | 2022-11-29 | 王树岩 | Aeration system and method for promoting fermentation and improving fertilizer efficiency |
| CN117232273A (en) * | 2023-09-14 | 2023-12-15 | 兰州泰得燃烧设备工程有限公司 | Circulating hot air system based on low-temperature area smoke exhaust technology |
| CN117232273B (en) * | 2023-09-14 | 2024-07-16 | 兰州泰得燃烧设备工程有限公司 | Circulating hot air system based on low-temperature area smoke exhaust technology |
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| CN103940083B (en) | 2016-06-08 |
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