CN201488267U

CN201488267U - Hot blast stove

Info

Publication number: CN201488267U
Application number: CN2009201748565U
Authority: CN
Inventors: 蒋玉亭
Original assignee: LANZHOU TINDER COMBUSTION EQUIPMENT ENGINEERING Co Ltd
Current assignee: LANZHOU TINDER COMBUSTION EQUIPMENT ENGINEERING Co Ltd
Priority date: 2009-09-03
Filing date: 2009-09-03
Publication date: 2010-05-26
Anticipated expiration: 2019-09-03

Abstract

The utility model discloses a heat supply unit which heats with fuel or gas and supplies hot air. The hot blast stove comprises a stove body which consists of a steel outer container and a steel inner container, an inner stove wall which is arranged in the inner container of the stove body and is made of fire resistant material, a burning chamber arranged in the inner stove wall, and a sandwich layer arranged between the steel inner container and the steel outer container, wherein the symmetric axis of the bottom of the burning chamber is provided with a fuel gas input pipe and a primary air input pipe; positions at the bottom of the burning chamber which are symmetric to the fuel gas input pipe and the primary air input pipe are provided with secondary air inlets for communicating the sandwich layer between the inner container and the outer container; the inner stove wall at a mixed air chamber at the downstream of the burning chamber is provided with a cold air inlet; the upstream of the cold air inlet is communicated with an outer air chamber; and the downstream of the mixed air chamber is a hot air outlet.

Description

A kind of hot-blast stove

Technical field

The utility model relates to a kind of utilize fuel oil or combustion gas heating, and the heating plant of hot blast is provided.The body of heater of forming by outer courage of steel and inner bag of the present utility model, be arranged at the internal protecting wall of making by refractory material in the body of heater inner bag, the combustion chamber that is positioned at internal protecting wall, and be positioned at the interlayer formation between steel inner container and outer courage.

Background technology

The most of steel cylinders liner fire-resistant layer structure that adopts of existing fuel-firing gas-firing hot-blast stove, but its service life is generally shorter, for prolonging the service life of body of heater cylindrical shell, the technical measures that increase flame retardant coating thickness that adopt more, but this measure makes furnace wall self amount of stored heat become very big on the one hand, influences the efficient of stove, and flame retardant coating is damaged, and blocked up liner flame retardant coating makes the body of heater own wt become big, makes body of heater be difficult to move.Also there is the part technology to adopt the jacket type air-cooled structure, as Chinese utility model patent 02212440.3 disclosed fuel gas hot-blast stove, 98222433.8 disclosed fuel gas hot-blast stove, 200420016992.9 disclosed high efficiency fuel fuel gas hot-blast stove, 200520074647.5 the superconductive gas-fired hot-blast stove of disclosed heat, and 03216922.1 disclosed air gas combustion furnace.With 03216922.1 is example, its technical solution is: its top, combustion chamber is bullet, the open top of cone, at the outer wall of combustion chamber around air jacket, the shape and the combustion chamber of air jacket are complementary, and the top of air jacket is a flame jet, and flame jet is directly over combustion chamber open-topped, grate below in the combustion chamber is wind inlet once, and there is coal gas secondary wind inlet the below of air jacket.But, make its heat loss bigger, and because the inner core and the cooling duct between the urceolus of chuck are natural air cooled because air jacket does not have flame retardant coating and heat-insulation layer, make it only be suitable for the negative pressure occasion, when furnace pressure fluctuates, high-temperature hot-air very easily occurs and leak, make it become bad safely; And flame directly washes away the inner core wall, and the combustion temperature in hearth lower furnace body about 1300 ℃ can reduce service life greatly.

Summary of the invention

The utility model provides a kind of prior art deficiency that overcomes, and it is higher to have efficient, and heat loss is little, and the no leakage point of body of heater self can be guaranteed safe handling during the furnace pressure fluctuation, and body of heater weight is lighter, is the hot-blast stove of fuel with fuel oil or combustion gas.

The body of heater that hot-blast stove of the present utility model is made up of the outer courage and the inner bag of steel, be arranged at the internal protecting wall of making by refractory material in the body of heater inner bag, be positioned at the combustion chamber of internal protecting wall, and be positioned at inner bag and constitute by the interlayer between the outer courage of steel, it is characterized in that symmetry axis place, bottom, combustion chamber is provided with fuel gas input pipe and a wind input pipe, be provided with the secondary wind inlet that is communicated with interlayer between inner bag and furnace outside-lining in the bottom of combustion chamber and with fuel gas input pipe and the symmetrical position of wind input pipe, be positioned on the internal protecting wall at wind mixed chamber place in downstream, combustion chamber and have cold air inlet, the upstream of cold air inlet is communicated with outer air compartment, and the downstream of wind mixed chamber is a hot-blast outlet.

Preferably: the inner bag of hot-blast stove of the present utility model and by being provided with the eddy flow gripper shoe between the interlayer between the outer courage of steel;

Secondary wind inlet is along outer courage arranged tangential;

Be provided with lightweight thermal insulation layer in the outer courage of steel of the present utility model, this lightweight thermal insulation layer is the alumina silicate needle punched blanket.

The utility model has following advantage:

1. in the structure of the present utility model, interlayer is the air channel of swirl secondary air between outer courage of steel and inner bag, be heated when required excessive secondary wind is by the interlayer between outer courage and inner bag in the stove combustion process, the secondary wind of formed heat helps the burning of combustion chamber, but while secondary wind cooled hearth, therefore can significantly reduce furnace wall thickness, reduced the flame retardant coating accumulation of heat, both improved the thermal efficiency, also prolonged simultaneously stove service life, shown furnace body outer wall of the present utility model≤40 ℃ through actual measurement;

2. combustion chamber and wind mixed chamber have formed totally-enclosed body of heater, go for full working condition requirements such as positive negative pressure, and it is rational in infrastructure, and is safe and reliable;

3. therefore the utility model lighter weight is convenient to move;

4. be provided with the eddy flow gripper shoe between the interlayer between outer courage of steel of the present utility model and inner bag, this structure both can make energy secure fixation between inner bag and body of heater, can make simultaneously to prolong the distance that secondary wind moves in this interlayer, the secondary wind energy farthest is heated;

5, the blast pipe of the utility model wind mixed chamber can make the cold wind that enters wind mixed chamber fully mix with the hot blast of combustion chamber along radially evenly the arranging of internal protecting wall.

Description of drawings

Accompanying drawing 1 is a cross-sectional view of the present utility model, wherein: (1) is fuel inlet, (2) be a wind inlet, (3) be burner, (4) be burner block, (5) are front panel, and (6) are the outer courage of steel, (7) be inner bag, (8) be the eddy flow gripper shoe, the internal protecting wall that make for refractory material (9), (10) are secondary wind air inlet, (11) be outer air compartment blast pipe along the internal protecting wall arranged tangential, (12) be wind mixed chamber, (13) are the air inlet of wind mixed chamber, and (14) are hot-blast outlet, (15) for being located at the secondary wind air inlet of combustion chamber bottom, (16) are the heat-insulation layer of being located at outside the body of heater.

Accompanying drawing 2 is provided with schematic diagram for the eddy flow gripper shoe between external furnace body and inner bag.

The schematic diagram that accompanying drawing 3 is arranged mutually for the secondary wind inlet (10) and the interlayer of inside and outside tweer as seen from the figure, is arranged tangential equally between (10) and interlayer.

Accompanying drawing 4 be accompanying drawing 1 A-A to the rotation generalized section.

The specific embodiment

Accompanying drawing 1 is a most preferred embodiment of the present utility model, in example shown in Figure 1, the internal protecting wall (9) that fuel-firing gas-firing hot-blast stove structure is made by the external furnace body that outside to inside is followed successively by steel (6), heat-insulation layer (16), eddy flow gripper shoe (8), inner bag (7), refractory material.Flame retardant coating thickness is less than 120mm among the embodiment of the present utility model.As seen from the figure, between heat-insulation layer (16) and inner bag (7), formed an interlayer.Be provided with eddy flow gripper shoe (8) in this interlayer, referring to accompanying drawing 2, eddy flow gripper shoe (8) rotation in the chuck that inner bag (7) and external furnace body (6) form arranges that wherein eddy flow gripper shoe (8) is one with external furnace body (6) weldering, and inner bag (7) is fixed therein.Eddy flow gripper shoe (8) forms the eddy flow passage on the one hand in the chuck layer, force secondary wind to play the cooling wind action, on the other hand inner bag (7) is played a supportive role, and inner bag (7) is freely stretched therein with flame retardant coating (9), with the thermal stress of loose burning generation.By accompanying drawing 3 as seen, the import (10) of cooling air (entering the secondary wind of furnace bottom during stove burning just) arranges that along chuck layer tangent to periphery direction this structure can force cooling air tangentially to enter interlayer, makes and strengthens its cooling effect.As seen from Figure 4, the natural cold wind that enters outer air compartment (12) is circumferentially to enter wind mixed chamber along wind mixed chamber, evenly enters in the wind mixed chamber with cold wind that the air inlet of the different sizes of wind mixed chamber can make the outside enter and is heated by being located at the outer air compartment (12) of connection on the internal protecting wall (9) simultaneously.

Jacket type air blast cooling structure is adopted in combustion chamber of the present utility model.Promptly outside reaching, inner bag forms air-cooled passage between the courage; flame retardant coating is that special arch high alumina is hung brick in the inner bag inwall; its thickness is less than 120mm in actual applications; the urceolus outside wall surface has employing gently to hold heat-insulation layer and metal casing that insulation material is made; having adopted acupuncture cotton in the utility model is insulation material; both made body of heater; inner bag can be subjected to the protection of heat-insulation layer; do not cause simultaneously it to need thicker heat-insulation layer again as prior art; cold wind through cold air duct in the deflector of while by the combustion fan supply that burner is joined evenly washes away passage after the anterior burner hearth that imports of body of heater; oblique wash away the cooling furnace wall in; participate in burning as secondary wind; the reason heat-insulation layer is thin and destroy can to make whole stove again, can also prolong the life-span of stove greatly.Operation according to reality shows.The utility model uses after 5 years and does not damage basically, still can continue to be on active service.In addition, integral structure is adopted in wind mixed chamber of the present utility model and combustion chamber, its inner core is formed by combustion chamber inner bag and flame retardant coating extension, and leave cold wind or loop back wind inlet, be provided with the flow-guiding channel of fixing inlet at air inlet, the final cold wind of sneaking into or the circulated air of guaranteeing is the rear end with the required fixing air quantity of using of hot equipment, also can the combustion chamber be remained in the rational operating temperature range by the introducing of work cold wind simultaneously, this have also prolonged service life of the present utility model to a certain extent.

Claims

1. hot-blast stove, outer courage and inner bag by steel, be arranged at the internal protecting wall of making by refractory material in the body of heater inner bag, be positioned at the combustion chamber of internal protecting wall, and be positioned at inner bag and constitute by the interlayer between the outer courage of steel, it is characterized in that symmetry axis place, bottom, combustion chamber is provided with fuel gas input pipe and a wind input pipe, be provided with the secondary wind inlet that is communicated with interlayer between inner bag and furnace outside-lining in the bottom of combustion chamber and with fuel gas input pipe and the symmetrical position of wind input pipe, be positioned on the internal protecting wall at wind mixed chamber place in downstream, combustion chamber and have cold air inlet, the upstream of cold air inlet is communicated with outer air compartment, and the downstream of wind mixed chamber is a hot-blast outlet.

2. hot-blast stove according to claim 1 is characterized in that inner bag and is provided with the eddy flow gripper shoe between the interlayer between courage outward by steel.

3. according to claim 1 or 2 described hot-blast stoves, it is characterized in that the arranged tangential of the blast pipe of outer air compartment along internal protecting wall.

4. hot-blast stove according to claim 3 is characterized in that being provided with lightweight thermal insulation layer in the outer courage of steel.

5. hot-blast stove according to claim 4 is characterized in that the lightweight thermal insulation layer that is provided with in the outer courage of steel is the alumina silicate needle punched blanket.