CN105485901B - A kind of grain-drying hot-air furnace - Google Patents

A kind of grain-drying hot-air furnace Download PDF

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Publication number
CN105485901B
CN105485901B CN201610011570.XA CN201610011570A CN105485901B CN 105485901 B CN105485901 B CN 105485901B CN 201610011570 A CN201610011570 A CN 201610011570A CN 105485901 B CN105485901 B CN 105485901B
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CN
China
Prior art keywords
smoke
furnace
tube
grain
heat exchanger
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CN201610011570.XA
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Chinese (zh)
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CN105485901A (en
Inventor
马培勇
陈水林
邢献军
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合肥工业大学
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Priority to CN201610011570.XA priority Critical patent/CN105485901B/en
Publication of CN105485901A publication Critical patent/CN105485901A/en
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Publication of CN105485901B publication Critical patent/CN105485901B/en

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    • Y02P60/853

Abstract

The invention discloses a kind of grain-drying hot-air furnaces, including handwarmer, heat exchanger, smoke guide pipe and smoke exhaust fan, it is characterised in that:It is additionally provided with shell outside handwarmer, heat exchanging chamber is formed between shell and handwarmer outer wall, handwarmer includes burning main body and burning auxiliary furnace body two parts, it is provided with the horizontally disposed and nozzle direction secondary wind inleting tube tangent with the furnace wall of burning auxiliary furnace body on burning auxiliary furnace body, is additionally provided with smoke-box case.The present invention has the following advantages compared with prior art:Of low cost, heat exchange efficiency is high, maintains easily cleaning, output hot blast temperature is stablized, and can effectively prevent heat exchanger tube and smoke guide pipe deformed damaged due to thermal stress.

Description

A kind of grain-drying hot-air furnace

Technical field

The present invention relates to hot-blast stove technical field more particularly to a kind of grain-drying hot-air furnaces.

Background technology

Grain drying is an important link in food storage, every year due to wet weather, dries not in time or does not reach The loss ratio shared in grain loss such as go mouldy, germinate to grain caused by safe moisture is up to 5%.Therefore, grain is studied Dry technology is eaten, realizes mechanization and the high efficiency of grain drying, is had very important significance to reducing grain loss.

Hot-blast stove is the main heating source equipment in grain machinery drying system, and performance directly affects the dry effect of grain The vital interests of rate and wide farmers.Since grain has higher requirement to the temperature and cleannes of dried medium, fired by fuel It burns the flue gas generated and is unable to convection drying grain, it is necessary to by heat exchanger come indirect drying grain.Traditional heat exchanger for hot-blast stove Frequent deformed damaged due to thermal stress of heat exchanger tube, and deashing is difficult inside heat exchanger tube, to safe and efficient production bring it is many not Just.

Invention content

It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of grain-drying hot-air furnaces.

The present invention is achieved by the following technical solutions:A kind of grain-drying hot-air furnace, including handwarmer, heat exchanger, Smoke guide pipe and smoke exhaust fan, exchanger heat bring out mouth and are connect with smoke exhaust fan, it is characterised in that:It is additionally provided with shell outside handwarmer Body forms heat exchanging chamber between shell and handwarmer outer wall, the cold side outlet of heat exchanger is connected to one end of heat exchanging chamber, heat exchanging chamber Hot-blast outlet pipe is arranged in the other end, and hot-blast outlet pipe is connect with air-heater, and handwarmer includes burning main body and burning auxiliary furnace Body two parts, burning main body are cylindrical structure, and burning auxiliary furnace body is arranged in cone above main body, below burning main body Air inlet is set, is provided with secondary wind inleting tube on burning auxiliary furnace body, secondary wind inleting tube is assisted through shell and burning Secondary air distribution is sent into furnace chamber by the furnace wall of furnace body, and secondary wind inleting tube is horizontally disposed with and the stove in nozzle direction and burning auxiliary furnace body Wall is tangent, and the flue gas in furnace chamber is transported to the hot side inlet of heat exchanger by setting smoke guide pipe at the top of burning auxiliary furnace body.

As further improvement of these options, heat exchanger includes that heat exchange straight tubes and shell is arranged in more horizontal parallels, Dust storage chamber is set in heat exchanger hot side inlet, is connect at the top of smoke guide pipe and dust storage chamber, the tube chamber for the straight tube that exchanges heat is connected to dust storage chamber.

As further improvement of these options, dust storage chamber bottom is provided with shoot door.

As further improvement of these options, in the hot junction of heat exchanger, outlet is additionally provided with smoke-box case, smoke exhaust fan It is connected to smoke-box case by smoke outlet tube, smoke-box case includes tube sheet end cap and smoke-box end cap, and tube sheet end cap is logical with smoke-box end cap It crosses after being bolted and is forming smoke-box chamber among them, the outlet end for the straight tube that exchanges heat is inserted into smoke-box intracavitary through tube sheet end cap, is changed It is provided with gap between the shell and tube sheet end cap of hot device, castor is additionally provided in smoke-box bottom portion.

As further improvement of these options, cold wind import is set between the shell and tube sheet end cap of heat exchanger, Strainer is provided in cold wind import.

As further improvement of these options, hose is additionally provided on smoke outlet tube.

As further improvement of these options, secondary wind inleting tube is provided with several, and is symmetrical arranged, and all two The direction of rotation for the air-flow that the air inlet direction of secondary blast pipe is formed in furnace chamber is consistent.

As further improvement of these options, baffle plate is additionally provided in the shell of heat exchanger, baffle plate is vertical It is arranged, baffling wall is provided in the heat exchanging chamber outside handwarmer.

As further improvement of these options, expansion joint is additionally provided in smoke guide pipe.

The present invention has the following advantages compared with prior art:Secondary wind inleting tube is set, enters the wind the swirling eddy formed not The abundant burning of fuel volatile matter is only promoted, and can effectively prevent larger unburning material and enter smoke guide pipe and import smoke-box; Expansion joint is set in smoke guide pipe, smoke guide pipe expanded by heating can be effectively prevent and by drawing crack;The air being discharged from heat exchanger is being rolled over Stream wall under the action of further exchange heat with the smoke guide pipe outer wall of high temperature and the furnace body outer wall of handwarmer, can protect smoke guide pipe outer wall and Handwarmer body outer wall is not burnt because of localized hyperthermia;There are certain interval, smoke-box casees between tube sheet end cap and outer cover of heat exchanger The hose being arranged on the castor and smoke outlet tube horizontal segment of lower part setting enables heat exchanger tube right end freely to stretch, to ensure it It will not be damaged because thermal stress acts on;Smoke-box end cap is connected with tube sheet end cap, after smoke-box end cap is dismantled, can use steel Drill rod dredges heat exchanger tube, and dust stratification is discharged from shoot door;Old of equipment provided by the present invention is cheap, and heat exchange efficiency is high, Cleaning is maintained easily, output hot blast temperature is stablized, and can effectively prevent heat exchanger tube and smoke guide pipe deformed damaged due to thermal stress.

Description of the drawings

Fig. 1 is schematic structural view of the invention.

Fig. 2 is the cross sectional plan view in the faces A-A.

Specific implementation mode

It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation Example.

As depicted in figs. 1 and 2, a kind of grain-drying hot-air furnace, including handwarmer 1, heat exchanger 2, smoke guide pipe 7 and Smoke Machine 82, the outlet of 2 hot junction of heat exchanger are connect with smoke exhaust fan 82, it is characterised in that:It is additionally provided with shell 6, shell 6 outside handwarmer 1 Heat exchanging chamber 62 is formed between 1 outer wall of handwarmer, the cold side outlet of heat exchanger 2 is connected to one end of heat exchanging chamber 62, heat exchanging chamber 62 The other end hot-blast outlet pipe 91 is set, hot-blast outlet pipe 91 connect with air-heater 9, and handwarmer 1 includes 12 He of main body of burning Burning auxiliary 11 two parts of furnace body, burning main body 12 are cylindrical structure, and burning auxiliary furnace body 11 is arranged in cone in main body An air inlet 13 is arranged in top, 12 lower section of burning main body, and secondary wind inleting tube 4 is provided on burning auxiliary furnace body 11, secondary Secondary air distribution is sent into furnace chamber by blast pipe 4 through the furnace wall of shell 6 and burning auxiliary furnace body 11, and 4 level of secondary wind inleting tube is set It sets and nozzle direction and the furnace wall of burning auxiliary furnace body 11 is tangent, 11 top setting smoke guide pipe 7 of burning auxiliary furnace body will be in furnace chamber Flue gas be transported to the hot side inlet of heat exchanger 2.By being arranged handwarmer 1 in shell 6, between shell 6 and handwarmer 1 Heat exchanging chamber 62 is formed, the air-flow in heat exchanging chamber 62 can take away the heat on 1 furnace wall of handwarmer, and 1 furnace wall of handwarmer is avoided to occur The phenomenon that burn-through, meanwhile, heat exchanging chamber 62 can also provide additional heat transfer space, improve the heat exchange efficiency of hot-blast stove;Pass through Air-flow takes away the scheme of the heat of 1 furnace wall of handwarmer, can save the cost input of 1 heat insulating refractory material of handwarmer, it is only necessary to The lower heat preservation of service rating and refractory material can be met the requirements;In addition, being set along burning auxiliary 11 furnace wall tangential direction of furnace body The secondary wind inleting tube 4 set can form the air-flow of rotation in furnace chamber, and swirling eddy not only promotes the abundant of fuel volatile matter Burning, and the unburning material of bulky grain can be got rid of to furnace wall, to effectively prevent larger unburning material from entering smoke guide pipe 7 and heat exchange Device 2;Secondary wind inleting tube 4 is passed through from heat exchanging chamber 62, additionally it is possible to the secondary air distribution in pipe be made to preheat.

Heat exchanger 2 includes more horizontal parallel setting heat exchange straight tubes 21 and shell 22, is arranged in 2 hot side inlet of heat exchanger and collects Dirt room 5, smoke guide pipe 7 are connect with 5 top of dust storage chamber, and the tube chamber of heat exchange straight tube 21 is connected to dust storage chamber 5.The section face of dust storage chamber 5 Product is much larger than the area of section of smoke guide pipe 7, so flow velocity of the flue gas in dust storage chamber 5 substantially reduces so that the particle in flue gas Object is able to sedimentation separation;In addition, dust storage chamber 5 is also used as the distributor of flue gas, flue gas is evenly distributed straight to each heat exchange In pipe 21;Flue gas is conveyed the cigarette that 5 bottom of agitation dust storage chamber can be avoided into dust storage chamber 5 from the top of dust storage chamber 5 by smoke guide pipe 7 Dirt makes the purification of flue gas be protected.

5 bottom of dust storage chamber is provided with shoot door 51.

In the hot junction of heat exchanger 2, outlet is additionally provided with smoke-box case 3, and smoke exhaust fan 82 passes through smoke outlet tube 8 and smoke-box case 3 Connection, smoke-box case 3 include tube sheet end cap 31 and smoke-box end cap 32, tube sheet end cap 31 and smoke-box end cap 32 be bolted after Smoke-box chamber 33 is formed among them, and the outlet end of heat exchange straight tube 21 is inserted into through tube sheet end cap 31 in smoke-box chamber 33, heat exchanger 2 It is provided with gap between shell 22 and tube sheet end cap 31, castor 34 is additionally provided in 3 bottom of smoke-box case.The setting of smoke-box case 3, energy It is discharged by smoke exhaust fan 82 after enough making fume centralized, after smoke-box end cap 32 is dismantled, can easily be dredged and be exchanged heat by drill rod Straight tube 21, maintains easily;Since convey is high-temperature flue gas in the tube chamber of heat exchange straight tube 21, and shell 22 and heat exchange straight tube 21 it Between conveying be cold air, so heat exchange straight tube 21 and the degree of 22 expanded by heating of shell are inconsistent, it is easy to cause to exchange heat Straight tube 21 is broken or crack occurs in shell 22, by gap being arranged between tube sheet end cap 31 and shell 22, both makes not contact, The case where capable of ensureing that heat exchange straight tube 21 has enough expansion spaces, the fracture of heat exchange straight tube 21 or shell 22 is avoided to be broken.

Cold wind import 23 is set between the shell 22 and tube sheet end cap 31 of heat exchanger 2, is provided in cold wind import 23 Strainer 24.

Hose 81 is additionally provided on smoke outlet tube 8.The setting of hose 81 can facilitate the movement of smoke-box case 3.

Secondary wind inleting tube 4 is provided with several, and is symmetrical arranged, and the air inlet direction of all secondary wind inleting tubes 4 is in furnace chamber The direction of rotation of the air-flow of interior formation is consistent.According to the demand of secondary air distribution, secondary wind inleting tube 4 could be provided as more, symmetrically The secondary wind inleting tube 4 of setting can ensure the stabilization of air-flow in furnace chamber, make the maintenance stable conditions of hot-blast stove.

Baffle plate 25 is additionally provided in the shell 22 of heat exchanger 2, baffle plate 25 is vertically arranged, changing outside handwarmer 1 Baffling wall 61 is provided in hot chamber 62.The effect of baffle plate 25 and baffling wall 61 be make cold wind as possible with heat exchange straight tube 21 and hand It burns the furnace wall of stove 1 to contact comprehensively and adequately, it is ensured that while heat exchange efficiency, ensure the furnace wall of heat exchange straight tube 21 and handwarmer 1 It will not there is a phenomenon where burn due to temperature is excessively high.

Expansion joint 71 is additionally provided in smoke guide pipe 7.The setting of expansion joint 71 can effectively prevent 7 expanded by heating of smoke guide pipe and By drawing crack.

The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.

Claims (9)

1. a kind of grain-drying hot-air furnace, including handwarmer, heat exchanger, smoke guide pipe and smoke exhaust fan, the exchanger heat are brought out Mouth is connect with smoke exhaust fan, it is characterised in that:It is additionally provided with shell outside the handwarmer, between the shell and handwarmer outer wall Heat exchanging chamber is formed, the cold side outlet of the heat exchanger is connected to one end of heat exchanging chamber, and hot-blast outlet is arranged in the other end of heat exchanging chamber Pipe, hot-blast outlet pipe are connect with air-heater, and the handwarmer includes burning main body and burning auxiliary furnace body two parts, the combustion Burning main body is cylindrical structure, and the burning auxiliary furnace body is arranged in cone above main body, is set below the burning main body An air inlet is set, secondary wind inleting tube is provided on burning auxiliary furnace body, the secondary wind inleting tube is through shell and burns auxiliary Help the furnace wall of furnace body that secondary air distribution is sent into furnace chamber, the secondary wind inleting tube is horizontally disposed and nozzle direction and burning auxiliary furnace The furnace wall of body is tangent, and the flue gas in furnace chamber is transported to the heat of the heat exchanger by setting smoke guide pipe at the top of the burning auxiliary furnace body Hold import.
2. a kind of grain-drying hot-air furnace as described in claim 1, it is characterised in that:The heat exchanger includes more horizontal parallels The heat exchange straight tube and shell of setting are arranged dust storage chamber in the heat exchanger hot side inlet, connect at the top of the smoke guide pipe and dust storage chamber It connects, the tube chamber of the heat exchange straight tube is connected to dust storage chamber.
3. a kind of grain-drying hot-air furnace as claimed in claim 2, it is characterised in that:Dust storage chamber bottom is provided with shoot door.
4. a kind of grain-drying hot-air furnace as claimed in claim 2, it is characterised in that:In the hot junction of heat exchanger, outlet is additionally provided with Smoke-box case, the smoke exhaust fan are connected to by smoke outlet tube with smoke-box case, and the smoke-box case includes tube sheet end cap and smoke-box end Lid, tube sheet end cap are forming smoke-box chamber, the outlet end of the heat exchange straight tube among them after being bolted with smoke-box end cap Through tube sheet end cap be inserted into smoke-box intracavitary, be provided with gap between the shell and tube sheet end cap of heat exchanger, smoke-box bottom portion also It is provided with castor.
5. a kind of grain-drying hot-air furnace as claimed in claim 4, it is characterised in that:Heat exchanger shell and tube sheet end cap it Between cold wind import is set, strainer is provided in cold wind import.
6. a kind of grain-drying hot-air furnace as claimed in claim 4, it is characterised in that:It is additionally provided on the smoke outlet tube Hose.
7. a kind of grain-drying hot-air furnace as described in claim 1, it is characterised in that:The secondary wind inleting tube is provided with several Root, and be symmetrical arranged, the direction of rotation for the air-flow that the air inlet directions of all secondary wind inleting tubes is formed in furnace chamber is consistent.
8. a kind of grain-drying hot-air furnace as described in claim 1, it is characterised in that:Folding is additionally provided in the shell of heat exchanger Flowing plate, the baffle plate are vertically arranged, and baffling wall is provided in the heat exchanging chamber outside handwarmer.
9. a kind of grain-drying hot-air furnace as described in claim 1, it is characterised in that:Expansion joint is additionally provided in smoke guide pipe.
CN201610011570.XA 2016-01-05 2016-01-05 A kind of grain-drying hot-air furnace CN105485901B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610011570.XA CN105485901B (en) 2016-01-05 2016-01-05 A kind of grain-drying hot-air furnace

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Application Number Priority Date Filing Date Title
CN201610011570.XA CN105485901B (en) 2016-01-05 2016-01-05 A kind of grain-drying hot-air furnace

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CN105485901A CN105485901A (en) 2016-04-13
CN105485901B true CN105485901B (en) 2018-08-17

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107957137A (en) * 2017-11-30 2018-04-24 杨朴 A kind of fuel gas hot-blast stove
CN108954816A (en) * 2018-07-20 2018-12-07 芜湖新农夫机械有限公司 A kind of hot-blast stove

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2175900Y (en) * 1993-12-14 1994-08-31 张泽清 Vertical long-life blast heater
KR100665659B1 (en) * 2006-03-16 2007-01-09 유한회사 유일 Apparatus for grain drying by using hot aircirculation
CN101566389A (en) * 2008-04-24 2009-10-28 沈阳东方钢铁有限公司 Horizontal-type high temperature hot-blast furnace
CN102192590A (en) * 2011-05-09 2011-09-21 广州迪森热能技术股份有限公司 Biomass whirlwind hot blast stove
CN104501548A (en) * 2014-12-25 2015-04-08 陆荣志 Penetration type hot air drying furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2175900Y (en) * 1993-12-14 1994-08-31 张泽清 Vertical long-life blast heater
KR100665659B1 (en) * 2006-03-16 2007-01-09 유한회사 유일 Apparatus for grain drying by using hot aircirculation
CN101566389A (en) * 2008-04-24 2009-10-28 沈阳东方钢铁有限公司 Horizontal-type high temperature hot-blast furnace
CN102192590A (en) * 2011-05-09 2011-09-21 广州迪森热能技术股份有限公司 Biomass whirlwind hot blast stove
CN104501548A (en) * 2014-12-25 2015-04-08 陆荣志 Penetration type hot air drying furnace

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