CN201615597U

CN201615597U - Hot blast furnace

Info

Publication number: CN201615597U
Application number: CN2010201052227U
Authority: CN
Inventors: 卢俊善
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-01
Filing date: 2010-02-01
Publication date: 2010-10-27
Anticipated expiration: 2020-02-01

Abstract

The utility model discloses a hot blast furnace which comprises a furnace body and a heat exchanger; the heat exchanger comprises an upper collection chamber, a lower collection chamber and an air cooling structure between the upper and lower collection chambers; the air cooling structure sequentially comprises an outer cylinder, an outer air cooling wall, a middle air cooling wall and an inner air cooling wall from exterior to interior, wherein the outer air cooling wall is provided with a plurality of mutually-independent heat exchanging tubes; the middle air cooling wall is provided with a plurality of heat exchanging tubes formed by connecting plates connected into a whole, the lower part of the middle air cooling wall is open and forms a lower smoke channel and the upper end is closed; the inner air cooling wall is provided with a plurality of heat exchanging tubes formed by connecting plates connected into a whole, the lower part of the inner air cooling wall is closed, and the upper end is open and forms an upper smoke channel. As the structure is adopted and the heat exchanger sufficiently utilizes the gas fume, the heat exchanging process is complete countercurrent flow heat exchanging and has high heat exchanging efficiency; the heat exchanger adopts three-layer air cooling wall structure, increases the effective heat exchange area, has high heat exchange efficiency and less steel consumption.

Description

Hot-blast stove

(1) technical field

The utility model relates to a kind of hot-blast stove, is used for mining industry, oven dry, timber processing, warmhouse booth etc.

(2) background technology

The indirect thermal wind furnace of domestic production at present mostly is shell and tube, telescopic or tubulation sleeve composite structure, exists phenomenons such as consumptive material is many, service life is short.Chamber design is unreasonable, and burner hearth is connected also unreasonable with heat exchanger, and burner hearth high temperature directly is radiated on the heat exchanger, easily makes the heat exchanger hot-spot and damages.The burner hearth that has does not then form the high-temperature region, and combustion conditions is bad, does not have secondary wind again, easy over-emitting black exhaust, and atural beat efficient is lower.

(3) summary of the invention

The technical problems to be solved in the utility model has provided a kind of hot-blast stove, and is rational in infrastructure, and consumptive material is few, long service life, stable performance, energy-conserving and environment-protective.

In order to solve the problems of the technologies described above, the utility model is realized by following measure:

A kind of hot-blast stove, comprise body of heater and heat exchanger, be provided with burner hearth and combustion chamber in the described body of heater, the burner hearth below has fire grate, described heat exchanger is arranged on the body of heater top, heat exchanger comprises collection chamber, following collection chamber and the air-cooled structure between the two, and described air-cooled structure comprises that from the urceolus that sets gradually outside to inside, outer air-cooled wall, middle air-cooled wall and interior air-cooled wall, wherein said outer air-cooled wall has some separate heat exchanger tubes; Middle air-cooled wall has and somely is connected to the heat exchanger tube of one by connecting plate, and the uncovered formation lower flue in bottom, upper end closed; In air-cooled wall have and somely be connected to the heat exchanger tube of one, and bottom sealing, the uncovered formation upper flue in upper end by connecting plate; Described upward collection chamber upper end is provided with the gas outlet, following collection chamber has air inlet and reaches the air inlet that communicates with the combustion chamber, and described urceolus side is provided with the outlet flue that communicates with upper flue, lower flue.

Consider easy to processly, described burner hearth is the integrated casting type structure.

In order to prevent hyperthermia radiation infringement heat exchanger, and guarantee coal in the high-temperature region, described burner hearth end face is an arcuate structure, and the middle part is provided with the fire hole that communicates with the combustion chamber.

Among the utility model embodiment, described burner hearth is provided with the even number secondary wind inleting tube, and described secondary wind inleting tube is evenly arranged along the tangential direction of fire hole.

Among the utility model embodiment, described outer air-cooled wall, middle air-cooled wall and interior air-cooled wall are shaped as circle or quadrangle.

The beneficial effects of the utility model:

1. the employing said structure has made full use of flue gas because of heat exchanger is set, and heat transfer process all is a countercurrent flow, the heat exchange efficiency height;

2. heat exchanger has adopted three layers of air-cooled wall construction, and effective heat exchange area is big, and the heat exchange efficiency height uses steel few;

3. burner hearth has adopted the integrated casting type chamber structure, and effective phenomenon that must prevent to damage because of hyperthermia radiation heat exchanger has guaranteed that simultaneously coal all the time in the high-temperature region burning, helps pin cigarette and dedusting;

4. be provided with secondary wind inleting tube in the burner hearth, the secondary wind of this system is supplied with spiral form through heating, has avoided over-emitting black exhaust, has improved the thermal efficiency.

(4) description of drawings

Fig. 1 is the structural representation of the selected embodiment of the utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the B-B cutaway view of Fig. 1.

Fig. 4 is the C-C cutaway view of Fig. 1.

Fig. 5 is the D-D cutaway view of Fig. 1.

Fig. 6 is that interior air-cooled wall 6 launches schematic diagram.

Fig. 7 is that middle air-cooled wall launches schematic diagram.

Among the figure 1, body of heater, 2, fire grate, 3, burner hearth, 4, the temperature proportional control valve, 5, air inlet, 6, interior air-cooled wall, 7, middle air-cooled wall, 8, outer air-cooled wall, 9, urceolus, 10, outlet flue, 11, gas outlet, 12, go up collection chamber, 13, collection chamber down, 14, secondary wind inleting tube, 15, connecting plate, 16, upper flue, 17, lower flue, 18, air inlet, 19, fire hole.

(5) specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further details, following explanation is exemplary, does not limit protection domain of the present utility model.

A kind of hot-blast stove shown in Fig. 1,2,3,4, comprise body of heater 1 and heat exchanger, be provided with burner hearth 3 and combustion chamber in the described body of heater 1, burner hearth 3 belows have fire grate 2, described heat exchanger is arranged on body of heater 1 top, heat exchanger comprises collection chamber 12, following collection chamber 13 and the air-cooled structure between the two, and described air-cooled structure comprises that wherein said outer air-cooled wall 8 has some separate heat exchanger tubes from the urceolus 9 that sets gradually outside to inside, outer air-cooled wall 8, middle air-cooled wall 7 and interior air-cooled wall 6; Air-cooled wall 7 has and somely is connected to the heat exchanger tube of one by connecting plate as shown in Figure 7, and the uncovered formation lower flue 16 in bottom, upper end closed; Have as air-cooled wall 7 in Fig. 6 and somely to be connected to the heat exchanger tube of one by connecting plate 15, and the bottom sealing, the uncovered formation upper flue 17 in upper end; Described upward collection chamber 12 upper ends are provided with the gas outlet, following collection chamber 13 has air inlet 5 and reaches the air inlet 18 that communicates with the combustion chamber, and described urceolus 9 sides are provided with the outlet flue 10 that communicates with upper flue 16, lower flue 17.

Described as shown in Figure 1 burner hearth 3 is the integrated casting type structure, and end face is an arcuate structure, and the middle part is provided with the fire hole 19 that communicates with the combustion chamber, effective phenomenon that must prevent to damage because of hyperthermia radiation heat exchanger, guaranteed that simultaneously coal all the time in the high-temperature region burning, helps pin cigarette and dedusting.

Described as shown in Figure 5 burner hearth 3 is provided with 4 secondary wind inleting tubes 14, and described secondary wind inleting tube 14 is evenly arranged along the tangential direction of fire hole 19, and wind is supplied with spiral form, has avoided over-emitting black exhaust, has improved the thermal efficiency.

Described as required outer air-cooled wall 8, middle air-cooled wall 7 and interior air-cooled wall 6 are shaped as circle or quadrangle etc.

The course of work of the present utility model is as follows:

Flue gas flow: flue gas flow is three backhauls, air-cooled wall 6 in flue gas is entered by burner hearth 3, rise in the space of upper flue 16 air-cooled wall 6 and middle air-cooled wall 7 in entering, come downwards to lower flue 17 enter in the middle of air-cooled wall 7 and urceolus 9 cavitys, rise to outlet flue 10 backs and discharge.

The air flow process: the air flow process is three backhauls, air enters down collection chamber 13 by air inlet 5, along up in outer air-cooled wall 8 pipes, walk to collection chamber 12 exocoels, descending in air-cooled wall 7 pipes in the middle of entering after turning back, walk to down collection chamber 13 inner chambers, up in air-cooled wall 6 pipes in entering after turning back, walk to collection chamber 12 inner chambers, the hot equipment of using is delivered in 11 discharges from the gas outlet then.

The distinguished and admirable journey of secondary: secondary wind enters furnace sandwich by the body of heater bottom, is advanced into secondary air channel 14 on the waste heat heating back, and cyclone type sprays in the burner hearth then.

Basic principle of the present utility model and advantage have more than been described.The utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; in the prerequisite that does not break away from the utility model scope; those skilled in the art can do many changes and improvements as required; can select as heat exchanger other forms of, these variations and improve and should belong to protection domain of the present utility model.The utility model protection domain should be defined by appending claims and equivalent thereof.

Claims

1. hot-blast stove, comprise body of heater (1) and heat exchanger, be provided with burner hearth (3) and combustion chamber in the described body of heater (1), burner hearth (3) below has fire grate (2), it is characterized in that: described heat exchanger is arranged on body of heater (1) top, heat exchanger comprises collection chamber (12), following collection chamber (13) and the air-cooled structure between the two, described air-cooled structure comprises that from the urceolus (9) that sets gradually outside to inside, outer air-cooled wall (8), middle air-cooled wall (7) and interior air-cooled wall (6), wherein said outer air-cooled wall (8) has some separate heat exchanger tubes; Middle air-cooled wall (7) has and somely is connected to the heat exchanger tube of one by connecting plate, and the uncovered formation lower flue in bottom (16), upper end closed; In air-cooled wall (7) have and somely be connected to the heat exchanger tube of one, and bottom sealing, the uncovered formation upper flue in upper end (17) by connecting plate; Described upward collection chamber (12) upper end is provided with the gas outlet, following collection chamber (13) has air inlet (5) and reaches the air inlet (18) that communicates with the combustion chamber, and described urceolus (9) side is provided with the outlet flue (10) that communicates with upper flue (16), lower flue (17).

2. according to the described hot-blast stove of claim 1, it is characterized in that: described burner hearth (3) is the integrated casting type structure.

3. according to the described hot-blast stove of claim 2, it is characterized in that: described burner hearth (3) end face is an arcuate structure, and the middle part is provided with the fire hole (19) that communicates with the combustion chamber.

4. according to claim 1,2 or 3 described hot-blast stoves, it is characterized in that: described burner hearth (3) is provided with even number secondary wind inleting tube (14), and described secondary wind inleting tube (14) is evenly arranged along the tangential direction of fire hole (19).

5. according to the described hot-blast stove of claim 3, it is characterized in that: described outer air-cooled wall (8), middle air-cooled wall (7) and interior air-cooled wall (6) are shaped as circle or quadrangle.