CN204165231U - A kind of trapezoidal fire grate hot-blast stove device with V-type finedraw - Google Patents

Abstract

The utility model discloses a kind of trapezoidal fire grate hot-blast stove device with V-type finedraw, comprise body of heater, furnace roof, fire door, Hui Men, combustion blower pipe, liner and fire grate; Furnace roof is arranged on the top of body of heater, and furnace roof welds corrugated fin, increases the heat exchange area of cold wind and flue gas, is conducive to the heat exchange between cold wind and flue gas; Fire grate is trapezoidal shape, fire-gate side wall is furnished with V-type finedraw, trapezoidal shape structure is conducive to coal being concentrated on centre position burning, V-type finedraw is as secondary air inlet, enter from V-type finedraw volatile ingredient that air in combustion zone both can produce when pyrolysis for coal cinder to fire again oxygen is provided, burnout degree can be used as again and provide oxygen for its after-flame, make coal combustion more abundant, and then improve coal combustion efficiency; Because coal mainly concentrates on position burning to the rear in the middle of fire grate, be dull and stereotyped at the grate near fire door, make more air enter into middle burner hearth position to the rear, be conducive to fuel combustion complete.

Description

A trapezoidal grate hot blast stove device with V-shaped slits

technical field

The utility model relates to a hot air stove used in a barn, in particular to a hot air stove suitable for a tobacco leaf barn.

Background technique

At present, most of the heating equipment for flue-cured tobacco barns are processed and manufactured according to the State Tobacco Office [2009] No. 418. The lower part of the row directly enters the air and the upper part directly exhausts the smoke. The disadvantages of this kind of combustion chamber are: the grate area is too large, when the coal is added into the furnace, the spreading area is too large, and the coal far away from the combustion center is not fully burned. The coal utilization rate is reduced; the insulation effect of the furnace door is poor, and the heat in the furnace is dissipated from the furnace door. In the furnace, when the cold air flows through the furnace body from bottom to top, it takes away too much heat, resulting in a decrease in the temperature of the combustion area in the furnace, resulting in incomplete combustion of fuel, resulting in a high concentration of carbon monoxide in the chimney tail gas. In addition, the furnace outlet is relatively large, and the flue gas stays in the furnace for a short time. The volatile components (including fine coal particles and combustible gaseous substances) produced during the pyrolysis of the coal block are not fully combusted in the furnace. The gas is discharged from the furnace, and the flue gas contains a large amount of unburned volatile matter and unburned fine coal particles, resulting in an increase in coal consumption and a decrease in thermal efficiency of the furnace.

Utility model content

In order to solve the above problems, the utility model provides a trapezoidal grate hot blast stove device with V-shaped slits, which can burn more fully, improve combustion efficiency, and reduce coal consumption.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A trapezoidal grate hot blast stove device with V-shaped slits, comprising a furnace body, a furnace roof, a furnace door, an ash door, a fire grate and a combustion-supporting blower pipe, the furnace door is arranged on the front upper part of the furnace body, and the ash door In the front lower part of the furnace body;

The furnace body is a cylindrical shape formed by rolling and welding metal steel plates; a ring-shaped refractory brick flange support ring is fixed along the circumferential direction on the inner wall of the furnace body. The inner wall is lined with refractory bricks, and the top of the lining is flush with the top of the cylindrical furnace body;

The furnace roof is arranged on the top of the furnace body, and a flue gas pipe is welded on one side of the furnace roof as the outlet of the flue gas channel, and the outlet of the flue gas channel is a gradual expansion, and a heat exchanger is welded on the other side of the furnace roof The support frame is welded with multiple corrugated fins on the furnace roof;

The fire grate is composed of a bottom fire grate, a support ring and a fire grate side wall. The support ring is arranged on the top outer side of the fire grate side wall and has an integrated structure with the fire grate side wall. The support ring is fixed on the inner wall of the lining, and the bottom The fire grate is arranged at the bottom of the side wall of the fire grate; the longitudinal section of the fire grate is trapezoidal, and the bottom fire grate is composed of a flat plate and a fire grate. The support frame is provided with a card slot in the middle of each grate metal support frame, and card pins corresponding to the card slots on the grate metal support frame are respectively provided in the middle of the four sides of the bottom grate. The bayonets on the row are inserted into the corresponding slots; the flat plate is close to the furnace door; a plurality of V-shaped slits are arranged on the side wall of the grate, the V-shaped slits are wide at the top and narrow at the bottom, and the V-shaped slits are vertical At the bottom edge of the side wall of the fire grate or form an angle with the bottom edge of the side wall of the fire grate;

The setting position of the furnace door is higher than the bottom fire grate, and the setting position of the ash door is lower than the bottom fire grate.

As a preferred solution of the utility model, the furnace door has a double-layer structure, the outer layer is steel plate, the inner layer is made of heat-insulating and heat-resisting refractory material with a certain thickness, and the inner layer is close to the inner wall of the furnace door.

Compared with the prior art, a trapezoidal grate hot blast stove device with V-shaped slits of the present invention has the following advantages:

1. The trapezoidal grate structure is conducive to concentrating the coal in the middle position for combustion. The V-shaped slit is used as the secondary air inlet. Components (including fine coal particles and combustible gaseous substances) provide oxygen for reburning, and can be used as overfire air to provide oxygen for their burnout, so that the coal can be burned more fully, thereby improving the coal combustion efficiency. Since the coal is mainly burned at the rear of the middle of the grate, the grate near the furnace door becomes a flat plate, so that more air enters the rear of the middle of the furnace, which is conducive to the complete combustion of fuel.

2. The furnace door is a double-layer structure, the outer layer is steel plate, and the inner layer is equipped with heat-insulating refractory material with a certain thickness. And the furnace door with good thermal insulation can prevent hot air from escaping from the furnace door and heat from the furnace door, reducing the heat loss rate.

3. The inner wall of the furnace is lined with refractory bricks of relatively high height, and it is laid at the same height as the cylindrical furnace body, so that the furnace can only burn and generate high-temperature flue gas without transferring too much heat to the cold air outside the furnace. It becomes a real hot blast stove, which is beneficial to keep the combustion temperature in the stove at a higher temperature, so that the fuel can be fully burned.

4. The gradually expanded flue gas channel outlet can reduce the flow velocity of the flue gas, which is beneficial to increase the residence time of the flue gas in the furnace, making it burn more fully and improving the combustion efficiency.

Description of drawings

Fig. 1 is the front view of a trapezoidal grate hot blast stove device with V-shaped slits;

Fig. 2 is the right side view of a trapezoidal grate hot blast stove device with V-shaped slits;

Fig. 3 is the structural representation of stove top;

Fig. 4 is the structural representation of fire grate;

Fig. 5 is the plane plan view of grate structure;

Figure 6 Schematic diagram of the furnace door.

In the attached drawings: 1—combustion blower pipe; 2—inner lining; 3—flue gas channel opening; 4—furnace top; 5—fin; 6—connected to heat exchanger support frame; 7—furnace door; ; 9—refractory brick flange support ring; 10—ash door; 11—metal support frame for grate; 12—furnace body; 13—gap gap; 14—support ring; 15—grate; 16—V-shaped slit ; 17—flat plate; 18—heat insulation layer; 19—iron plate layer.

Detailed ways

As shown in Figures 1 and 2, a trapezoidal grate hot blast stove device with V-shaped slits includes a furnace body 12, a furnace roof 4, a furnace door 7, ash door 10, a fire grate 8, and a combustion-supporting blower pipe 1. The door 7 is arranged on the front upper part of the furnace body 12, the ash door 10 is arranged on the front lower part of the furnace body 12, and the combustion-supporting blower pipe is arranged on the bottom of the furnace body 12 and is positioned below the fire grate 8.

The furnace body 12 is a cylindrical shape formed by rolling and welding metal steel plates, and the bottom is welded with a metal furnace bottom. On the inner wall of the furnace body 12, a ring-shaped refractory brick flange support ring 9 is fixed along the circumferential direction, and refractory bricks are laid on the top of the refractory brick flange support ring 9 along the inner wall of the furnace body 12 as a lining 2. The top of 2 is flush with the top of cylindrical body of heater 12.

The furnace roof 4 is set on the top of the furnace body 12, and the flue gas pipe is welded on one side of the furnace roof 4 as the flue gas channel outlet 3, and the flue gas channel outlet is a gradual expansion, and the heat exchange is welded on the other side There are multiple corrugated fins 5 welded on the furnace roof 4. As shown in Figure 3, the corrugated fins 5 increase the heat exchange area between the cold wind and the flue gas, which is beneficial to the gap between the cold wind and the flue gas. heat exchange.

Fire grate 8 is made up of bottom fire grate, support ring 14 and fire grate side wall, as shown in Figure 4,5. The support ring 14 is arranged on the top outside of the side wall of the fire grate and has an integral structure with the side wall of the fire grate, all of which are made of refractory mud, and the bottom fire grate is arranged at the bottom in the side wall of the fire grate. The support ring 14 is fixed on the inner wall of the inner lining 2, that is, a circular support groove is drilled along the refractory brick in the circumferential direction of the inner lining 2, the support ring is placed in the support groove, and the gap between the two is covered with a refractory brick. Apply the mud to fix the fire grate 8 on the lining 2. The longitudinal section of the fire grate 8 is trapezoidal. The bottom fire grate is composed of a flat plate 17 and a fire grate 15. A fire grate gap 13 is formed between the fire grate 15. The metal support frames of the fire grate are respectively welded on the inner bottom surface of the fire grate side wall along the four sides. 11. A card slot is provided in the middle of each grate metal support frame 11, and bayonet pins corresponding to the card slots on the grate metal support frame 11 are respectively provided in the middle of the four sides of the bottom grate. The bayonet on the top is inserted into the corresponding slot to limit the movement of the grate 15 in the front, rear, left, and right directions. The bottom grate can be lifted through the ash door 10, and the bottom grate can be taken out through the furnace door. The flat plate 17 is close to the furnace door 7, and a plurality of V-shaped slits are arranged on the side wall of the fire grate. The V-shaped slits are wide at the top and narrow at the bottom. The sides form an angle.

The setting position of the furnace door 7 is higher than the bottom grate, and the setting position of the ash door 10 is lower than the bottom grate. Furnace door 7 is a double-layer structure (iron plate layer 19 and thermal insulation layer 18), as shown in Figure 6, the outer layer is steel plate, and the inner layer is made of thermal insulation refractory material with a certain thickness (such as aluminum silicate fiber, etc.) Made, the inner layer is close to the inner wall of the furnace door, and the outer layer with the sealing gasket is fastened to the outer wall of the furnace door.

Coal is fed from the furnace door 7, placed on the grate 8, and burned on the grate 8, the air is sucked into the ash chamber under the grate 8 by the blower, and then enters the combustion area to contact with the coal on the grate Make it burn; the flue gas produced by the coal combustion flows out from the opening of the flue gas channel.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (2)

1. one kind has the trapezoidal fire grate hot-blast stove device of V-type finedraw, comprise body of heater (12), furnace roof (4), fire door (7), grey door (10), fire grate (8) and combustion blower pipe (1), described fire door (7) is arranged on the front upper of body of heater (12), ash door (10) is arranged on the front lower of body of heater (12), it is characterized in that: described body of heater (12) welds the cylindrical of formation for metal foil rolls; The inwall of body of heater (12) is along the circumferential direction fixedly installed the refractory brick flange bracing ring (9) of a loop configuration, lay refractory brick in the top of refractory brick flange bracing ring (9) along the inwall of body of heater (12) and make liner (2), the top of liner (2) is concordant with the top of cylindrical furnace (12);

Described furnace roof (4) is arranged on the top of body of heater (12), at the side of furnace roof (4) welding flue as exhaust gases passes outlet (3), described exhaust gases passes outlet is a flaring mouth, at the opposite side welding heat exchanger bracing frame (6) of furnace roof (4), furnace roof (4) is also welded with multi-disc corrugated fin (5);

Described fire grate (8) is made up of bottom fire grate, bracing ring (14) and fire-gate side wall, bracing ring (14) be arranged on fire-gate side wall top outer and with fire-gate side wall integral structure, bracing ring (14) is fixed on the inwall of liner (2), and bottom fire grate is arranged on the bottom in fire-gate side wall; The longitudinal cross-section of described fire grate (8) is trapezoidal shape, described bottom fire grate is made up of dull and stereotyped (17) and grate (15), grate metal supporting frames (11) is welded respectively along four limits in the inside bottom surface of fire-gate side wall, a draw-in groove is provided with in the centre of each grate metal supporting frames (11), arrange respectively and the draw-in groove bayonet lock one to one in grate metal supporting frames (11) in the middle part of four limits of bottom fire grate, bayonet lock on the fire grate of described bottom inserts in corresponding draw-in groove, and described flat board (17) is near fire door (7); Described fire-gate side wall is arranged many V-type finedraws, this V-type finedraw is narrow below upper face width, and V-type finedraw has angle perpendicular to fire-gate side wall base or with fire-gate side wall base;

The setting position of described fire door (7) is higher than bottom fire grate, and the setting position of grey door (10) is lower than bottom fire grate.

2. a kind of trapezoidal fire grate hot-blast stove device with V-type finedraw according to claim 1, it is characterized in that: described fire door (7) is double-decker, outer layer plate, internal layer is made by having certain thickness heat insulating refractory materials, and internal layer is close to stove gate internal face.