CN201297768Y

CN201297768Y - High-efficiency vertical hot blast stove

Info

Publication number: CN201297768Y
Application number: CNU2008201857089U
Authority: CN
Inventors: 孔世林; 刘东润
Original assignee: Dongtai Sancang Energy-saving Boiler Co Ltd
Current assignee: Dongtai Sancang Energy-saving Boiler Co Ltd
Priority date: 2008-09-08
Filing date: 2008-09-08
Publication date: 2009-08-26
Anticipated expiration: 2018-09-08

Abstract

The utility model discloses a high-efficiency vertical hot blast stove which comprises a cold air cover, a hot air outlet, a smoke outlet, a hearth enclosed by a hearth wall, a smoke ring for flowing smoke and a heat exchange region for heating cold air, wherein the smoke ring for flowing smoke and the heat exchange region for heating cold air are separated by a metal plate and are respectively communicated with the smoke outlet and the hot air outlet; the lower end of the cold air cover is connected with an air outlet outer lateral plate which is supported on a base, and at least two guiding plates are mounted at the outlet of the heat exchange region along the wind direction and are arranged between the air outlet outer lateral plate and the hearth wall; a gap is reserved between the adjacent guiding plates and is communicated with the hot air outlet, and the four guiding plates with the gaps are symmetrically mounted on the base and are uniformly distributed on the same circumference. The utility model has the advantages of high heat exchange efficiency, great hot air flow, compact structure and notable energy-saving effect and is widely suitable for various pipeless hot blast stoves.

Description

Efficient vertical barrel hot-blast stove

Technical field

The utility model relates to a kind of heated-air drying equipment, relates in particular to the improvement of vertical barrel hot-blast stove.

Background technology

The vertical barrel hot-blast stove is uncomplicated because of its structure, cost is lower, heat exchange efficiency is high, the output hot blast is pollution-free, and is widely used in the oven dry of silk cocoon, grain, food, feed, medicinal material and various industrial materials.

At present, the vertical barrel hot-blast stove is made up of cold wind cover, cigarette ring and burner hearth etc. usually, outside air is under air-heater draft effect, enter from hot-blast stove top outermost layer, walk around the cigarette ring in the hot-blast stove bottom and enter heat transfer zone, air obtains energy after the heat transfer zone outlet is discharged from hot-blast outlet in heat transfer zone; Flue gas enters the cigarette ring through upper furnace under the effect of flue gas air exhauster, with the cigarette ring outside air discharge by the hot-blast stove bottom after carrying out heat exchange, flue gas, hot blast are respectively walked its road, do not disturb mutually, so the hot blast of vertical barrel hot-blast stove output are pollution-free.But it structurally still has the following disadvantages: 1. the hot blast fetch of hot-blast outlet one side is short, and the few resistance of bent angle is little, and then the hot blast fetch is long for hot-blast outlet opposite one side, bent angle is many, resistance is big, thereby the hot air flow of both sides is inconsistent, causes total hot air flow to fall flat.2. because the relative opposite side hot blast resistance of hot-blast outlet is big, and flow is little, produces heat inevitably and be detained, cause this part thermal loss and cause the thermal efficiency of complete machine to descend.3. because amount of localized heat is detained, form high temperature, cause steel housing skin to be in for a long time under the condition of high temperature and quicken the oxidation of body of heater steel plate, the service life of shortening heat wind furnace.4. because hot air flow descends and device heat efficiency descends, and desire improves hot air flow and hot blast temperature, must increase fuel and consume, increase operating cost, cause more pollution.Do not see at present the document and the product of the above-mentioned deficiency of effective solution.

The utility model content

Technical problem to be solved in the utility model provides a kind of efficient vertical barrel hot-blast stove, and not only hot air flow is big for this hot-blast stove, the thermal efficiency is high, and long service life.

In order to solve the problems of the technologies described above, efficient vertical barrel hot-blast stove of the present utility model, comprise the cold wind cover, hot-blast outlet, exhanst gas outlet, the burner hearth that surrounds by hearth wall, and the cigarette ring of the circulation flue gas that is divided into by metallic plate and the heat transfer zone of heats cold air, described hot-blast outlet and exhanst gas outlet are connected with described heat transfer zone and cigarette ring respectively, the lower end of described cold wind cover is connected with the air outlet outer panel, this air outlet outer panel is supported on the base, described heat transfer zone outlet is equipped with two deflectors at least along wind direction, this deflector is between air outlet outer panel and hearth wall, and leave the gap between the adjacent deflector, hot-blast outlet is led in this gap.

After adopting such scheme, owing between air outlet outer panel and hearth wall, be provided with the deflector of some mutual separations, make from the hot-air of heat transfer zone outlet outflow, vertically flow to earlier the space between deflector and the hearth wall downwards, flow to the space between deflector and the air outlet outer panel again from the gap between the adjacent baffle, export from hot-blast outlet at last.This set of deflector makes that the hot blast resistance of all directions is basic identical, hot air flow is even on each position around heat transfer zone, eliminate heat so on the one hand effectively and be detained thermal loss and the little deficiency of being brought of hot air flow, improved the thermal efficiency and hot air flow greatly; On the other hand, also, avoided heat to be detained the big phenomenon of formed furnace body temperature difference, stoped the generation of the local red-hot phenomenon of body of heater, thereby prolonged the service life of equipment greatly because hot blast can be with heat outwards output equably.Simultaneously, this structure of setting up deflector also makes the air in the heat transfer zone be able to even heating, and fuel availability is higher, has both helped reducing the waste of fuel source, has reduced Air again.

Further embodiment of the present utility model, described deflector have four, and the deflector of these four symmetric arrangement is installed on the base with a gap.Described four uniform deflectors are positioned on the same circumference.This reasonable in design, the hot blast guide functions is even, and helps making and installing.

A kind of preferred implementation of the present utility model, the ratio of the air outlet width B of described hot-blast outlet and the cross-sectional diameter D of cold wind cover: B/D=0.8～1.2.Adopt the hot-blast outlet of big width, further guaranteed evenly conveying swimmingly of hot blast, and the together use of this structure and deflector, improved heat exchange efficiency and hot air flow more, have the advantage that the hot blast output quantity is big, fuel consumption is few.

Description of drawings

Below in conjunction with the drawings and specific embodiments the efficient vertical barrel hot-blast stove of the utility model is described in further detail.

Fig. 1 is the structure cutaway view of the positive apparent direction of a kind of specific embodiment of the efficient vertical barrel hot-blast stove of the utility model.

Fig. 2 is the left view of structure shown in Figure 1.

Fig. 3 is the A-A cross-sectional view of structure shown in Figure 1.

The specific embodiment

In Fig. 1, efficient vertical barrel hot-blast stove shown in Figure 2, this hot-blast stove includes cold wind cover 1, be fixedly connected on the air outlet outer panel 9 of cold wind cover 1 lower end, be positioned at the hearth wall 6 of air outlet outer panel 9, and being positioned at the cigarette ring 3 of the current drainage flue gas that is divided into by metallic plate of cold wind cover 1 and the heat transfer zone 4 of heats cold air, the top of cold wind cover 1 has cold wind import 2.Lower position at cold wind cover 1 is provided with exhanst gas outlet 11, and air outlet outer panel 9 outsides are provided with two hot-blast outlets 10, and this hot-blast outlet 10 and exhanst gas outlet 11 are connected with heat transfer zone 4 and cigarette ring 3 respectively.Base 8 is supported on the basis, ground, is provided with shoot door below base 8.Between air outlet outer panel 9 and hearth wall 6, form hot blast and drawn the chamber, this hot blast is drawn chamber and hearth wall 6 and burner hearth 7 and is in sustained height, this structural change existing hot air furnace hot air draw the structure that chamber and burner hearth 7 set up separately up and down, make the hot-blast furnace body structure compact more, also more help the even smooth and easy discharge of hot blast.Be provided with fire door 12 at air outlet outer panel 9 and hot-blast outlet 10 relative opposite sides, so that in burner hearth 7, add fuel.Between the bottom surface of heat transfer zone 4 exits and base 8 along circumferentially uniform and be installed with four deflectors 5.

As shown in Figure 3, this deflector 5 is between air outlet outer panel 9 and hearth wall 6, and deflector has four, comprises one that has fire door 12, and the deflector of these four symmetric arrangement is installed on the base with a gap, and four uniform deflectors are positioned on the same circumference.Leave the gap between the adjacent baffle 5, thereby formed the exhaust passage of perpendicular narrow symmetry, hot-blast outlet 10 is led in this exhaust passage.During work, its flue gas is discharged from exhanst gas outlet 11 through burner hearth 7, cigarette ring 3 successively.Its cold air then enters into space between cold wind cover 1 and the cigarette ring 3 after preheating by the cold wind import 2 at cold wind cover 1 top continuously, enter heat transfer zone 4 heating, after the outlet of heat transfer zone 4 flows to space between deflector 5 and the hearth wall 6, flow to hot-blast outlet 10 from the perpendicular narrow gap between the deflector 5 equably again.

The air outlet outer panel 9 that is positioned at cold wind cover 1 lower end in the present embodiment is provided with two hot-blast outlets 10, so that supply with hot blast to a plurality of dry kilns.The hot-blast outlet basically identical of the height of hot-blast outlet 10 and existing hot-blast stove, but the width B of hot-blast outlet 10 by chance equals the cross-sectional diameter D of cold wind cover 1, by a large amount of tests and analysis contrast, the width B of this hot-blast outlet 9 is much larger than the structure of existing hot-blast outlet width, to all even smooth and easy hot air flow is very effective, and can obtain the higher thermal efficiency.Certainly the ratio of the cross-sectional diameter D of the exit width B of hot-blast outlet 10 and cold wind cover 1: B/D should be between 0.8～1.2 according to practical working situation design determine, with the flow resistance that reduces hot blast output to greatest extent and increase hot air flow.The body of heater outside also is equipped with secondary air adjustor valve 13, two discharge pipe extends in the burner hearth 7, and the air-out flow direction of two discharge pipes of this secondary air adjustor valve 13 and burner hearth 7 perisporium general tangential, rotation is combustion-supporting after making the secondary wind that enters burner hearth 7 tangentially enter burner hearth, impel fuel completing combustion, eliminate flue dust, improve fuel availability.

Above-mentionedly only enumerated preferred implementations more of the present utility model, but the utility model is not limited thereto, many improvement and conversion can also be arranged.Not only can be 4 as deflector 5, can also be two, three or polylith more, and concrete quantity should be looked furnace binding, working condition or size and be determined; Hot-blast outlet also is not limited to two, also can be one, three or other number.Therefore as long as between air outlet outer panel and hearth wall, adopted deflector structure, all fall in the protection domain of the present utility model.

Claims

1, a kind of efficient vertical barrel hot-blast stove, comprise cold wind cover (1), hot-blast outlet (10), exhanst gas outlet (11), the burner hearth (7) that surrounds by hearth wall (6), and the cigarette ring (3) of the circulation flue gas that is divided into by metallic plate and the heat transfer zone (4) of heats cold air, described hot-blast outlet (10) and exhanst gas outlet (11) are connected with described heat transfer zone (4) and cigarette ring (3) respectively, it is characterized in that: the lower end of described cold wind cover (1) is connected with air outlet outer panel (9), this air outlet outer panel (9) is supported on the base (8), described heat transfer zone (4) outlet is equipped with two deflectors (5) at least along wind direction, this deflector (5) is positioned between air outlet outer panel (9) and the hearth wall (6), and adjacent deflector leaves the gap between (5), and hot-blast outlet (10) is led in this gap.

2, efficient vertical barrel hot-blast stove according to claim 1, it is characterized in that: described deflector (5) has four, and the deflector of these four symmetric arrangement (5) is installed on the base (8) with a gap.

3, efficient vertical barrel hot-blast stove according to claim 2, it is characterized in that: described four uniform deflectors (5) are positioned on the same circumference.

4, efficient vertical barrel hot-blast stove according to claim 1 is characterized in that: described cold wind cover (1) bottom is provided with an exhanst gas outlet (11), and described air outlet outer panel (9) is provided with two hot-blast outlets (10).

5, according to each described efficient vertical barrel hot-blast stove in the claim 1～4, it is characterized in that: the ratio of the cross-sectional diameter D of the air outlet width B of described hot-blast outlet (10) and cold wind cover (1): B/D=0.8～1.2.

6, according to the efficient vertical barrel hot-blast stove described in each in the claim 1～4, it is characterized in that: described body of heater is outside equipped with secondary air adjustor valve (13), its air outlet leads in the described burner hearth (7), and the air-out flow direction of this secondary air adjustor valve (13) air outlet and burner hearth (7) perisporium general tangential.