CN214199195U - Large-scale direct gas hot-blast furnace - Google Patents

Abstract

The application relates to a large direct type gas hot blast stove which comprises a gas burner, a blower, a combustion chamber and a wind mixing chamber, wherein the gas burner is connected with the combustion chamber, a gas outlet of the gas burner is communicated with the combustion chamber, one end of the combustion chamber, which is far away from the gas burner, is communicated with the wind mixing chamber, the blower is connected with the combustion chamber, and the blower is communicated with the wind mixing chamber. Starting the gas burner and the air blower, wherein the gas burner sprays high-temperature gas to the combustion chamber, the high-temperature gas in the combustion chamber enters the air mixing chamber, air in the air blower enters the air mixing chamber to be mixed with the high-temperature gas in the air mixing chamber, the mixed gas in the air mixing chamber enters a cavity containing materials to be dried, and the combustion chamber and the air mixing chamber are disassembled and assembled, so that the transportation of the gas hot blast stove is facilitated. The air mixing chamber has the advantages that the combustion chamber is separated from the air mixing chamber, and therefore the air mixing chamber is convenient to transport.

Description

Large-scale direct gas hot-blast furnace

Technical Field

The application relates to the field of hot blast stoves, in particular to a large direct type gas hot blast stove.

Background

The hot blast stove is formed by directly burning fuel and mixing with air. The hot air is directly contacted with the materials to be heated, dried or roasted. The fuel is gas fuel, such as coal gas, natural gas and liquid gas. The fuel of the oil and gas hot blast stove is combusted through a combustor to generate high-temperature gas, the heat of the high-temperature gas is conducted to heated air by the hot blast stove with a heat exchange enhancement measure, and the temperature of the high-temperature gas is reduced to below 250 ℃ after the heat is dissipated, and the high-temperature gas is discharged to the atmosphere through a draught fan. The air furnace generally comprises a fire grate, refractory bricks, a reflecting plate, a hot-blast furnace body, an air mixing chamber, a flue, an air inlet pipeline, a dust remover, a chimney, a support, an induced draft fan (comprising an adjusting valve), an air blower (comprising an adjusting valve), a special temperature measuring instrument and the like.

In view of the above-mentioned related technologies, the inventor considers that the whole hot blast stove is bulky and inconvenient to transport.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the transportation of the hot blast stove, the application provides a large direct gas hot blast stove.

The application provides a large-scale direct type gas hot-blast furnace adopts following technical scheme:

a large direct gas hot blast stove comprises a gas burner, a blower, a split combustion chamber and a wind mixing chamber, wherein the gas burner is connected with the combustion chamber, an air outlet of the gas burner is communicated with the combustion chamber, one end of the combustion chamber, far away from the gas burner, is communicated with the wind mixing chamber, the blower is connected with the combustion chamber, and the blower is communicated with the wind mixing chamber.

By adopting the technical scheme, the gas burner and the blower are started, the gas burner sprays high-temperature gas to the combustion chamber, the high-temperature gas in the combustion chamber enters the air mixing chamber, the air in the blower enters the air mixing chamber to be mixed with the high-temperature gas in the air mixing chamber, and the mixed gas in the air mixing chamber enters the chamber containing the materials to be dried, so that the materials are dried. The combustion chamber is transported to a working place, the air mixing chamber is built by using building materials, and then the combustion chamber and the air mixing chamber are assembled, so that the transportation difficulty is reduced, and the transportation of the gas hot blast stove is facilitated.

Optionally, the air mixing chamber comprises an air chamber body, a hot air inlet is formed in one end, close to the combustion chamber, of the air chamber body, a hot air outlet is formed in one end, far away from the hot air inlet, of the air chamber body, and the side wall of the air chamber body is made of refractory bricks.

By adopting the technical scheme, the high-temperature gas in the combustion chamber and the air in the air blower enter the air mixing chamber from the hot air inlet in the air mixing chamber, the hot air is mixed with the air, the mixed gas leaves the air mixing chamber from the hot air outlet, and the air mixing chamber is built at the working place by utilizing the refractory bricks, so that the transportation difficulty is reduced.

Optionally, the large direct gas hot blast stove further comprises a heat insulation layer, the heat insulation layer is sleeved on the combustion chamber and is in contact connection with the combustion chamber, the heat insulation layer is sleeved on the air mixing chamber and is in contact connection with the air chamber body, and the heat insulation layer is made of aluminum silicate.

By adopting the technical scheme, the heat preservation layer is used for preserving heat of the combustion chamber and the air mixing chamber, so that the heat loss in the combustion chamber and the air mixing chamber is reduced.

Optionally, the outer side of the insulating layer around the air chamber body is in contact connection with a red brick insulating layer.

By adopting the technical scheme, the red brick heat-insulating layer further insulates heat of the air mixing chamber and protects the heat-insulating layer around the air mixing chamber.

Optionally, the combustion chamber comprises an inner shell and an outer shell, the inner shell is fixedly connected with a support pile, one end of the supporting pile, which is far away from the inner shell, is arranged on the outer shell, one end of the inner shell is provided with a hot air inlet, a hot gas outlet is arranged at one end of the inner shell far away from the hot gas inlet, the gas burner is fixed on the heat-insulating layer, the air outlet of the gas combustion engine is communicated with the hot air inlet of the inner shell, one end of the outer shell is provided with an air inlet, an air outlet is arranged at one end of the shell far away from the air inlet, the shell is fixedly connected with the air mixing chamber, the air outlet of the outer shell is communicated with the hot air inlet of the air chamber body, the hot air outlet of the inner shell is communicated with the hot air inlet of the air chamber body, the heat preservation has seted up inlet air channel, the clearance between inner shell and the shell is linked together with inlet air channel, the air outlet and the inlet air channel of air-blower are linked together.

By adopting the technical scheme, the air blown out by the blower enters the gap between the inner shell and the outer shell through the air inlet channel and enters the air mixing chamber through the air outlet of the outer shell, and the inner shell preheats the air in the gap between the inner shell and the outer shell.

Optionally, a fin is fixed on the side wall of the inner casing.

Through adopting above-mentioned technical scheme, the fin has increased air and inner shell area of contact to preheat more abundant the air.

Optionally, there are a plurality of the fins, and there is a gap between adjacent fins.

By adopting the technical scheme, the gaps among the fins are used for reducing the cracks of the fins caused by expansion with heat and contraction with cold.

Optionally, the fin is S-shaped in cross-section along the length direction.

By adopting the technical scheme, the fins block the air, so that the air generates turbulent flow in the moving process, and the heat exchange efficiency of the fins and the air is improved.

Optionally, an evacuation pipe is fixedly connected to the air mixing chamber, the evacuation pipe penetrates through the heat insulation layer and the red brick heat insulation layer, the evacuation pipe is communicated with the air mixing chamber, and an electric air valve is fixedly connected to the evacuation pipe.

By adopting the technical scheme, after the hot blast stove stops working, a part of high-temperature gas still can be reserved in the air mixing chamber and the combustion chamber, the electric air valve is started, and the electric air valve discharges the high-temperature gas in the air mixing chamber and the combustion chamber through the emptying pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the embodiment of the application starts the gas burner and the air blower by arranging the gas burner, the air blower, the combustion chamber and the air mixing chamber, the gas burner sprays high-temperature gas to the combustion chamber, the high-temperature gas in the combustion chamber enters the air mixing chamber, air in the air blower enters the air mixing chamber through gaps among the air inlet pipeline, the inner shell and the outer shell and is mixed with the high-temperature gas in the air mixing chamber, and the mixed gas in the air mixing chamber enters a cavity containing materials to be dried. The combustion chamber and the air mixing chamber are disassembled, and the combustion chamber is transported, so that the transportation of the gas hot blast stove is convenient;

2. this application embodiment is through having set up the fin, and the fin has increased the area of contact of air with the inner shell to preheat more abundant the air and carry out better heat dissipation to the inner shell. The fins enable air to generate turbulence in the moving process, so that the heat exchange efficiency of the fins and the air is improved.

Drawings

Fig. 1 is a schematic structural diagram of a large direct gas hot blast stove according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a fin in a large direct-fired hot air furnace according to an embodiment of the present application.

Description of reference numerals: 1. a gas burner; 2. a blower; 3. a combustion chamber; 31. an inner shell; 32. a hot gas inlet; 33. a hot gas outlet; 34. a housing; 35. an air inlet; 36. an air outlet; 37. supporting piles; 38. a fin; 4. a wind mixing chamber; 41. an air chamber body; 42. a hot air inlet; 43. a hot air outlet; 5. a heat-insulating layer; 6. an air inlet channel; 7. a red brick heat-insulating layer; 8. emptying the pipe; 9. an electric air valve.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a large-scale direct type gas hot blast stove. Referring to fig. 1, a large direct gas hot blast stove includes a gas burner 1, a blower 2, a combustion chamber 3, and a wind mixing chamber 4. The gas burner 1 is connected with the combustion chamber 3, and the air outlet of the gas burner 1 is communicated with the combustion chamber 3. One end of the combustion chamber 3 far away from the gas burner 1 is bonded with the air mixing chamber 4 through cement, and one end of the combustion chamber 3 far away from the gas burner 1 is communicated with the air mixing chamber 4. The blower 2 is connected with the combustion chamber 3, and the blower 2 is communicated with the air mixing chamber 4. Starting the gas burner 1 and the blower 2, wherein the gas burner 1 sprays high-temperature gas to the combustion chamber 3, the high-temperature gas in the combustion chamber 3 enters the air mixing chamber 4, the air in the blower 2 enters the air mixing chamber 4 to be mixed with the high-temperature gas in the air mixing chamber 4, and the mixed gas in the air mixing chamber 4 enters a chamber containing materials to be dried. The combustion chamber 3 is transported to a working place, the air mixing chamber 4 is built by using building materials, and then the combustion chamber 3 and the air mixing chamber 4 are assembled, so that the transportation difficulty is reduced, and the transportation of the gas hot blast stove is facilitated.

Referring to fig. 1, the plenum 4 includes a plenum body 41, and a sidewall of the plenum body 41 is composed of refractory bricks, and the plenum body 41 is constructed in a working place through the refractory bricks, thereby reducing transportation difficulty. One end of the air chamber body 41 close to the combustion chamber 3 is provided with a hot air inlet 42, and one end of the air mixing chamber 4 far away from the hot air inlet 42 is provided with a hot air outlet 43. The high-temperature gas in the combustion chamber 3 and the air in the blower 2 enter the air-mixing chamber 4 from a hot air inlet 42 in the air-mixing chamber 4, and exit the air-mixing chamber 4 from a hot air outlet 43.

Referring to fig. 1, the large direct gas hot blast stove further includes an insulating layer 5. The heat preservation layer 5 is sleeved on the combustion chamber 3, the heat preservation layer 5 is sleeved on the air mixing chamber 4, and the heat preservation layer 5 is made of aluminum silicate. The heat preservation layer 5 is used for preserving heat of the combustion chamber 3 and the air mixing chamber 4, and heat loss in the combustion chamber 3 and the air mixing chamber 4 is reduced. And a red brick heat-insulating layer 7 is arranged outside the heat-insulating layer 5 around the air mixing chamber 4, the red brick heat-insulating layer 7 further insulates heat of the air mixing chamber 4, and simultaneously protects the heat-insulating layer 5 around the air mixing chamber 4.

Referring to fig. 1, the combustion chamber 3 includes an inner shell 31 and an outer shell 34, a plurality of support posts 37 are welded to the inner shell 31, and the support posts 37 are disposed on the outer shell 34. A hot air inlet 32 is formed at one end of the inner casing 31, and a hot air outlet 33 is formed at one end of the inner casing 31 away from the hot air inlet 32. The gas burner 1 penetrates through the insulating layer 5 and is welded on the inner shell 31, and the air outlet of the gas burner 1 is communicated with the hot air inlet 32 of the inner shell 31. An air inlet 35 is formed at one end of the housing 34, and an air outlet 36 is formed at one end of the housing 34 far away from the air inlet 35. The shell 34 is welded on the air mixing chamber 4, and the air outlet 36 of the shell 34 is communicated with the hot air inlet 42 of the air mixing chamber 4. The hot air outlet 33 of the inner casing 31 communicates with the hot air inlet 42 of the air mixing chamber 4. The heat-insulating layer 5 is provided with an air inlet channel 6, and a gap between the inner shell 31 and the outer shell 34 is communicated with the air inlet channel 6. The air blower 2 is fixedly connected to the heat-insulating layer 5 through bolts, and an air outlet of the air blower 2 is communicated with the air inlet channel 6. Air blown by the blower 2 enters a gap between the inner casing 31 and the outer casing 34 through the air inlet passage 6 and enters the air mixing chamber 4 through the air outlet 36 of the outer casing 34, and the inner casing 31 preheats the air in the gap between the inner casing 31 and the outer casing 34.

Referring to fig. 1 and 2, a plurality of fins 38 are fixed to the side wall of the inner casing 31. The fins 38 increase the contact area of the air with the inner casing 31, thereby preheating the air more sufficiently. There is a certain gap between adjacent fins 38. The gaps between adjacent fins 38 serve to reduce cracking of the fins 38 due to thermal expansion and contraction. The fins 38 are S-shaped in cross section along their length. The fins 38 block the air, so that the air generates turbulence in the movement process, thereby improving the heat exchange efficiency of the fins 38 and the air.

Referring to fig. 1, an evacuation pipe 8 is welded to the air mixing chamber 4. An emptying pipe 8 is communicated with the air mixing chamber 4, the emptying pipe 8 penetrates through the heat-insulating layer 5 and the red brick heat-insulating layer 7, and an electric air valve 9 is fixedly connected to the emptying pipe 8. When the hot blast stove stops working, a part of high-temperature gas still remains in the air mixing chamber 4 and the combustion chamber 3, the electric air valve 9 is started, and the electric air valve 9 discharges the high-temperature gas in the air mixing chamber 4 and the combustion chamber 3 through the emptying pipe 8.

The implementation principle of the large-scale direct gas hot blast stove of the embodiment of the application is as follows: starting the gas burner 1 and the blower 2, wherein the gas burner 1 sprays high-temperature gas to the combustion chamber 3, the high-temperature gas in the combustion chamber 3 enters the air mixing chamber 4, the air in the blower 2 enters the air mixing chamber 4 through the air inlet channel 6 and the gap between the inner shell 31 and the outer shell 34 and is mixed with the high-temperature gas in the air mixing chamber 4, and the mixed gas in the air mixing chamber 4 enters a chamber containing materials to be dried. The combustion chamber 3 and the air mixing chamber 4 are separated, the combustion chamber 3 is transported, the air mixing chamber 4 is built at a working place, and then the air mixing chamber 4 and the combustion chamber 3 are assembled, so that the transportation of the gas hot blast stove is facilitated.

The fins 38 increase the contact area of the air with the inner casing 31, thereby enabling the inner casing 31 to more sufficiently preheat the air and to better dissipate heat from the inner casing 31. The fins 38 block the air, so that the air generates turbulence in the moving process, thereby improving the heat exchange efficiency of the fins 38 and the air.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A large-scale direct gas hot-blast furnace which is characterized in that: the air-mixing device comprises a gas burner (1), an air blower (2), a split type combustion chamber (3) and an air mixing chamber (4), wherein the gas burner (1) is connected with the combustion chamber (3), an air outlet of the gas burner (1) is communicated with the combustion chamber (3), one end, far away from the gas burner (1), of the combustion chamber (3) is communicated with the air mixing chamber (4), the air blower (2) is connected with the combustion chamber (3), and the air blower (2) is communicated with the air mixing chamber (4).

2. A large direct gas hot blast stove according to claim 1, characterized in that: the air mixing chamber (4) comprises an air chamber body (41), a hot air inlet (42) is formed in one end, close to the combustion chamber (3), of the air chamber body (41), a hot air outlet (43) is formed in one end, far away from the hot air inlet (42), of the air chamber body (41), and the side wall of the air chamber body (41) is composed of refractory bricks.

3. A large direct gas hot blast stove according to claim 2, characterized in that: the large direct type gas hot blast stove further comprises a heat insulation layer (5), the heat insulation layer (5) is sleeved on the combustion chamber (3), the heat insulation layer (5) is in contact connection with the combustion chamber (3), the heat insulation layer (5) is sleeved on the air mixing chamber (4), the heat insulation layer (5) is in contact connection with the air chamber body (41), and the heat insulation layer (5) is made of aluminum silicate.

4. A large direct gas hot blast stove according to claim 3, characterized in that: the outer side of the heat-insulating layer (5) around the air chamber body (41) is in contact connection with a red brick heat-insulating layer (7).

5. A large direct gas hot blast stove according to claim 4, characterized in that: the combustion chamber (3) comprises an inner shell (31) and an outer shell (34), a support pile (37) is fixedly connected to the inner shell (31), one end, far away from the inner shell (31), of the support pile (37) is arranged on the outer shell (34), a hot air inlet (32) is formed in one end of the inner shell (31), one end, far away from the hot air inlet (32), of the inner shell (31) is provided with a hot air outlet (33), the gas combustion engine (1) is fixed on the heat insulation layer (5), an air outlet of the gas combustion engine (1) is communicated with the hot air inlet (32) of the inner shell (31), one end of the outer shell (34) is provided with an air inlet (35), one end, far away from the air inlet (35), of the outer shell (34) is provided with an air outlet (36), the outer shell (34) is fixedly connected with the air mixing chamber (4), the air outlet (36) of the outer shell (34) is communicated with a hot air inlet (42) of the air chamber body (41), the hot air outlet (33) of the inner shell (31) is communicated with the hot air inlet (42) of the air chamber body (41), the heat insulation layer (5) is provided with an air inlet channel (6), a gap between the inner shell (31) and the outer shell (34) is communicated with the air inlet channel (6), and the air outlet of the air blower (2) is communicated with the air inlet channel (6).

6. A large direct gas hot blast stove according to claim 5, characterized in that: fins (38) are fixed on the side wall of the inner shell (31).

7. A large direct gas hot blast stove according to claim 6, characterized in that: the fins (38) are plural, and gaps are formed between the adjacent fins (38).

8. A large direct gas hot blast stove according to claim 7, characterized in that: the fin (38) has an S-shaped cross section along the length direction.

9. A large direct gas hot blast stove according to claim 8, characterized in that: an emptying pipe (8) is fixedly connected to the air mixing chamber (4), the emptying pipe (8) penetrates through the heat insulation layer (5) and the red brick heat insulation layer (7), the emptying pipe (8) is communicated with the air mixing chamber (4), and an electric air valve (9) is fixedly connected to the emptying pipe (8).

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