CN102080874A - Eccentric air heating furnace - Google Patents

Abstract

The invention discloses an eccentric air heating furnace for heating foods, tea, medicines, and the like. The air heating furnace structurally comprises a furnace body lower part (1), a furnace body middle part (2), a furnace body upper part (3) and a furnace body top part (4) and comprises four layers from inside to outside, i.e. a combustion chamber (5), a warm air space layer (6), an exhaust space layer (7) and a cold air space layer (8), wherein the furnace body lower part (1) comprises an air inlet (9), a coal cinder chamber (10) and an exhaust port (11), a fire grate (12) is arranged between the furnace body middle part (2) and the furnace body lower part (1), the innermost face of the furnace body middle part (2) is provided with a fireproof wall (13), the furnace body middle part (2) and the furnace body upper part (3) are totally called as the combustion chamber (5), the combustion chamber (5) and the exhaust space layer (7) at the top of the furnace body are mutually communicated through a flue (14), and the warm air space layer and the cold air space layer are sealed and communicated through an upper cover (15). The air heating furnace is mainly characterized in that the cold air space layer of the furnace body lower part (1) is provided with an eccentric air uniform plate, and air entering the furnace is uniformly preheated in an improved mode to absorb heat emitted by the exhaust space layer (7) to the maximum limit so that the heat efficiency is effectively improved.

Description

The centering type hot-blast stove

Technical field

The present invention relates to a kind of hot blast and generate equipment, be mainly used in the oven dry and the heating of medicine, cereal, medicine, tealeaves and other food etc., belong to the food machinery field.

Background technology

The structure of hot-blast stove in the market is all fairly simple, there is not this device of eccentric air uniform plate, even fan housing is consistent with the distance of zone of heating at diverse location, easy to make like this, simple, but cause the outside temperature height on one side of body of heater, temperature is low on one side, and the heat of flue layer is not fully absorbed, and the thermal efficiency is low.Mainly be because air by blower fan when air inlet blows into cold wind, wind pressure ratio near the air inlet position is big, wind speed is big, the position pressure far away from air inlet is little, wind speed is slow, thereby the air quantity that passes through on one side by air inlet is big, it is insufficient to be heated, to cause integral body to add thermal effect bad for inequality because cold wind is heated, thereby waste a large amount of energy.

Summary of the invention

The problem to be solved in the present invention is: make the air thermally equivalent that enters in the stove, make full use of the heat that coal smoke is taken away in the smoke space layer, thereby improve the thermal efficiency, reduce the use amount of combustion matchmaker and stalk, economize on resources effectively and protect environment.

In order to solve the problems of the technologies described above, eccentric hot-blast stove of the present invention, this energy-saving hot blast furnace body of heater is divided into four parts from top to bottom: body of heater bottom (1), body of heater middle part (2), upper of furnace body (3) and body of heater top (4), hot-blast stove is divided into four layers from the inside to surface: combustion chamber (5), warm braw space layer (6), smoke space layer (7) and cold wind space layer (8), body of heater bottom (1) comprises air inlet (9), cinder chamber (10) and exhaust opening (11), fire grate (12) is between body of heater middle part (2) and body of heater bottom (1), be provided with refractory wall (13) in the inside in body of heater middle part (2), body of heater middle part and upper of furnace body are referred to as combustion chamber (5), top combustion chamber (5) and smoke space layer (7) at body of heater pass through flue (14) UNICOM mutually, and warm braw space layer and cold wind space layer be UNICOM by loam cake (15) sealing.It is characterized in that: be provided with vertical heat transfer plate (16) on warm braw space layer (6) inwall, heat-conducting plate (16) quantity has 10 to 24.

For solving hot-blast stove cold wind space layer because of the different uneven problems of preheating that cause of inlet pressure, the cold wind space layer (8) in body of heater bottom (1) is provided with a vertical eccentric air uniform plate (17).Eccentric air uniform plate cylindrical and outer cover (18) inwall are integrally welded, the outer wall of inner ring and smoke space layer leaves uneven air intake gap, local pressure near the centrifugal blower air inlet is big, the gap of leaving is little, local pressure away from air inlet is little, and the gap of leaving is big, makes that the air quantity that enters cold wind space layer middle part and top is even, thereby the cold air in the cold wind space layer evenly preheating also fully absorbs the heat that flue space layer coal smoke is taken away, and has effectively saved the energy.

Be added with flow and the pressure that eccentric air uniform plate (17) is used for controlling wind in cold wind space layer (8) lining in addition, the account form of the mean breadth of eccentric air uniform plate (x) is as follows:

$\mathrm{\&pi;}{(l_2-x)}^2-\mathrm{\&pi;}{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102465977E0000022.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2=\mathrm{ab}$

Thereby the mean breadth that gets eccentric air uniform plate (x) is

$x=l_2-\sqrt{\mathrm{ab}/\mathrm{\&pi;}+{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102465977E0000022.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2}$

Wherein x is the width of eccentric air uniform plate, 1 ₁Be the radius of smoke space layer outer wall, 1 ₂Be the radius of outer cover (18), a and b are the wide and high of air inlet.The width of eccentric air uniform plate is usually between 6 centimetres and 9 centimetres.

The width of eccentric air uniform plate (17) is 6 centimetres～9 centimetres.The cylindrical of eccentric air uniform plate (17) is welded on the outer cover inwall, and the center of circle of the interior round heart and outer cover (18) is departed from 1 centimetre to 3 centimetres, but warm braw space layer (6) is on the same center of circle in outer cover (18), smoke space layer outer wall and the body of heater.

Description of drawings

Fig. 1 is the side schematic view of analysing and observe of eccentric hot-blast stove

Fig. 2 is the vertical view after eccentric hot-blast stove is laid down loam cake

Fig. 3 is the parameter schematic diagram of air inlet and eccentric air uniform plate

The specific embodiment

Eccentric hot-blast stove of the present invention, this energy-saving hot blast furnace body of heater is divided into three parts from top to bottom: body of heater bottom (1), body of heater middle part (2), upper of furnace body (3) and body of heater top (4), hot-blast stove is divided into four layers from the inside to surface: combustion chamber (5), warm braw space layer (6), smoke space layer (7) and cold wind space layer (8), body of heater bottom (1) comprises air inlet (9), cinder chamber (10) and exhaust opening (11), fire grate (12) is between body of heater middle part (2) and body of heater bottom (1), body of heater middle part (2) is owing to be the position of fuel combustion, temperature is the highest, therefore there is refractory brick (13) (2) innermost layer, body of heater middle part, body of heater middle part and upper of furnace body are referred to as combustion chamber (5), 18 heat-conducting plates (16) are arranged with the contact area of increase with air on warm braw space layer inwall, thereby effectively utilize heat energy, top combustion chamber (5) and smoke space layer (7) at body of heater pass through flue (14) UNICOM mutually, and warm braw space layer and cold wind space layer be UNICOM by loam cake (15) sealing.

We add offset heart air uniform plate (17) at the cold wind space layer in the body of heater bottom, eccentric air uniform plate outer ring and outer cover (18) inwall are integrally welded, the outer wall of inner ring and smoke space layer leaves uneven air intake gap, local pressure near the centrifugal blower air inlet is big, the gap of leaving is little, local pressure away from air inlet is little, the gap of leaving is big, make that the air quantity enter cold wind space layer middle part and top is even, thus the cold air in the cold wind space layer evenly preheating and the abundant heat taken away of absorption flue space layer coal smoke.For example, the diameter of the eccentric air uniform plate outer ring of the hot-blast stove that we design is 1496 millimeters, the diameter of inner ring is 1338 millimeters, but the center of inner ring is at 10 millimeters places of outer ring right of center horizontal direction, eccentric air uniform plate outer ring directly is welded on outer cover (18) inwall, inner ring and flue gas layer collar wall leave uneven slit, and the eccentric air uniform plate that is welded on the outer cover inwall makes

The cold wind space layer has formed the less cold air duct of local area, the area of this passage area than centrifugal blower air inlet as calculated is big slightly, can not produce obvious inhibition to air intake, had should the off-centre air uniform plate make enter in the cold wind space layer, the cold wind on top is more even, thereby make cold wind obtain better preheating, play the effect of abundant absorption flue gas layer coal smoke heat.

The mean breadth of eccentric air uniform plate (17) is determined that by above-mentioned formula according to common body of heater size, width is 8 centimetres, is welded between the bottom (1) and middle part (2) of body of heater

The center of circle of eccentric air uniform plate (17) and the home position of outer cover (18) are offset 1.8 centimetres to the opposite direction of air inlet, and the center of circle of the inside and outside wall of warm braw space layer (6) and smoke space layer (7) is all at same position.

Claims (5)

1. centering type hot-blast stove, this hot-blast furnace body is divided into four parts from top to bottom: body of heater bottom (1), body of heater middle part (2), upper of furnace body (3) and body of heater top (4), hot-blast stove is divided into four layers from the inside to surface: combustion chamber (5), warm braw space layer (6), smoke space layer (7) and cold wind space layer (8), body of heater bottom (1) comprises air inlet (9), cinder chamber (10) and exhaust opening (11), fire grate (12) is between body of heater middle part (2) and body of heater bottom (1), be provided with refractory wall (13) in the inside in body of heater middle part (2), body of heater middle part and upper of furnace body are referred to as combustion chamber (5), top combustion chamber (5) and smoke space layer (7) at body of heater pass through flue (14) UNICOM mutually, and warm braw space layer and cold wind space layer be UNICOM by loam cake (15) sealing.It is characterized in that: on warm braw space layer (6) inwall, be provided with vertical heat transfer plate (16).

2. centering type hot-blast stove according to claim 1 is characterized in that: heat-conducting plate (16) quantity has 10 to 24.

3. centering type hot-blast stove according to claim 1 is characterized in that: (8) one of cold wind space layer in body of heater bottom (1) vertically are provided with eccentric air uniform plate (17).

4. centering type hot-blast stove according to claim 3 is characterized in that: the width of eccentric air uniform plate (17) is 6 centimetres～9 centimetres.

5. according to claim 3 or the described centering type hot-blast stove of claim 4, it is characterized in that: the cylindrical of eccentric air uniform plate (17) is welded on the outer cover inwall, the center of circle of the interior round heart and outer cover (18) is departed from 1 centimetre to 3 centimetres, but warm braw space layer (6) is on the same center of circle in outer cover (18), smoke space layer outer wall and the body of heater.

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