CN211345830U

CN211345830U - Industrial gas flue gas hot blast stove

Info

Publication number: CN211345830U
Application number: CN201922251753.0U
Authority: CN
Inventors: 康明红; 肖彬; 卢卫东; 袁杰煌
Original assignee: Yueyang Yuanda Heat Energy Equipment Co ltd
Current assignee: Yueyang Yuanda Heat Energy Equipment Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-08-25
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses an industrial gas flue gas hot-blast furnace, its characterized in that: the hot blast furnace consists of a hot blast furnace shell, a heat insulation layer, a fire facing layer and an air box, wherein the hot blast furnace shell is a steel furnace shell, the air box is arranged at a furnace end of the hot blast furnace, and an outlet of the air box is connected with a swirler; the heat insulation layer and the heat insulation layer are of a layer structure made of high-alumina fiber modules; the flame-facing layer is made of high-quality heat-resistant stainless steel. The utility model has the advantages of simple structure, easy maintenance can accomplish the thermal-insulated insulation construction of hot-blast furnace earlier under online, directly on line the hot-blast furnace hoist and mount when needing, very big improvement the engineering progress, the life of stove prolongs to three to five years moreover to there is the multilayer insulating layer, the stove outer covering surface is close to ambient temperature.

Description

Industrial gas flue gas hot blast stove

Technical Field

The utility model relates to an industrial gas flue gas hot-blast furnace.

Background

At present, most industrial gas hot blast stoves are masonry or casting structure stoves, and the heat insulating refractory materials adopted by the stove are heavy shaped refractory bricks or unshaped various refractory castable materials. The following drawbacks are found in the existing industrial gas flue gas drying hot blast stove:

1. the masonry or cast structure furnace has the advantages that as a large amount of water is distributed to the masonry during construction, the furnace must be baked for at least several days or even longer after the furnace is built, and the mass production time is delayed;

2. the furnace with a slightly large size can only be built or poured on line because the refractory material has heavy weight, otherwise the furnace cannot be hoisted in place, and the whole construction period is greatly prolonged because a large amount of time is occupied;

3. when a built or cast furnace is maintained and repaired, the maintenance period is very long because the old furnace is difficult to dismantle and replace;

4. because the heavy refractory material hardly has elastic deformation, after a period of work, the heat insulation layer often generates cracks, and high-temperature flue gas can directly reach the furnace shell through the cracks, so that the temperature of the furnace shell is greatly increased, a large amount of heat energy is wasted, and the furnace shell is usually required to be insulated to prevent heat loss and high temperature from hurting people;

5. because the heat insulation property of the heavy refractory material is not high, if the ideal shell temperature is obtained, the heat insulation layer needs to be made thick, so the appearance of the furnace is generally larger, the space of other equipment is occupied, and more materials are consumed;

6. the heat insulation layer built by heavy shaping and amorphous materials is very easy to crack after working for a period of time, the high temperature directly reaches the furnace shell, and the deformation of the furnace shell aggravates the damage to the heat insulation layer, so the service life of the furnace is about one year or even shorter.

Therefore, in summary, there is a need to develop an industrial gas hot blast stove with longer service life, lighter weight, convenient integral hoisting, no occupation of installation or production time of other equipment, convenient maintenance and repair, and no need of external heat preservation.

Disclosure of Invention

An object of the utility model is to provide a long service life, weight, light make things convenient for integral hoisting, do not crowd and account for other equipment fixing or production time to it is convenient to maintain, need not to carry out outer heat retaining industrial gas flue gas hot-blast furnace.

The technical scheme of the utility model is that: the utility model provides an industrial gas flue gas hot-blast furnace which characterized in that: the hot blast furnace consists of a hot blast furnace shell, a heat insulation layer, a fire facing layer and an air box, wherein the hot blast furnace shell is a steel furnace shell, the air box is arranged at a furnace end of the hot blast furnace, and an outlet of the air box is connected with a swirler; the heat insulation layer and the heat insulation layer are of a layer structure made of high-alumina fiber modules; the flame-facing layer is made of high-quality heat-resistant stainless steel.

Further, the swirler is installed at a position outside a nozzle of the burner.

Furthermore, the high-quality heat-resistant stainless steel is provided with a high-temperature-resistant coating.

The utility model discloses an each part designs into the module entirely, adopts ordinary split compound mode to connect between each part, and whole outward appearance is monomer cylinder type.

Compared with the prior art, the utility model has the advantages of as follows:

1. the traditional heavy refractory heat-insulating material which is difficult to maintain is replaced by a light high-alumina fiber material which is easy to replace, so that the overall weight of the hot blast stove is greatly reduced, and the rapidness and convenience in installation, maintenance and repair are realized;

2. the high-aluminum fiber module enables the temperature rise of the furnace shell to be less than or equal to 40 ℃ of the ambient temperature due to excellent heat insulation and installation compactness of the high-aluminum fiber module, so that the furnace shell does not need to be subjected to heat preservation outside the furnace body; the thicknesses of the heat-insulating layer and the heat-insulating layer are also reduced, so that the overall dimension of the furnace body is greatly reduced;

4. the backflow flue gas with lower temperature is compressed through the cyclone at the position of the burner, the flow velocity is improved, and then the backflow flue gas is attached to the flame facing layer of the inner wall of the hearth and wraps high-temperature flame forwards, so that the hearth is protected, the heating temperature of a heat insulation material is reduced, and the full combustion is ensured.

Drawings

FIG. 1 is a block diagram of the present invention;

in the figure, 1, a furnace end air box; 2. a swirler; 3. a hot blast stove outer shell; 4. a heat-insulating layer; 5. a thermal insulation layer; 6. a fire-facing layer; 7. a sampling port of the hearth; 8. manhole/explosion-proof valve.

Detailed Description

The invention will be further explained with reference to the drawings and the detailed description below:

as shown in fig. 1, the utility model relates to an industrial gas flue gas hot blast stove, which comprises a hot blast stove shell, a heat preservation layer, a heat insulation layer, a fire facing layer and a bellows, wherein the hot blast stove shell is a steel stove shell, the bellows is arranged at a hot blast stove burner, and the outlet of the bellows is connected with a swirler; the heat insulation layer and the heat insulation layer are of a layer structure made of high-alumina fiber modules; the flame-facing layer is made of high-quality heat-resistant stainless steel.

Further, the swirler is installed at a position outside a nozzle of the burner.

The utility model discloses a working method:

the quick whirl wind of formation behind swirler 2 behind furnace end bellows 1 is passed through to the backward flow flue gas, and whirl wind is pasting and is facing fire layer 6 and furnace inner wall and flowing toward the stove tail direction, forms an isolation layer between high temperature flame and furnace inner wall, and the facing fire layer then protects insulating layer 5 and avoids high velocity air to erode, and high temperature then is by insulating layer 5 and 4 separation of heat preservation in the stove like this to guarantee that the shell temperature heaies up within 40 degrees at ambient temperature.

The embodiments of the present invention are only descriptions of the preferred embodiments of the present invention, not the limitations of the concept and scope of the present invention, and the technical solutions of the present invention should fall into the protection scope of the present invention without departing from the design idea of the present invention.

Claims

1. The utility model provides an industrial gas flue gas hot-blast furnace which characterized in that: the hot blast furnace consists of a hot blast furnace shell, a heat insulation layer, a fire facing layer and an air box, wherein the hot blast furnace shell is a steel furnace shell, the air box is arranged at a furnace end of the hot blast furnace, and an outlet of the air box is connected with a swirler; the heat insulation layer and the heat insulation layer are of a layer structure made of high-alumina fiber modules; the flame-facing layer is made of high-quality heat-resistant stainless steel.

2. The industrial gas-fired flue gas hot blast stove according to claim 1, characterized in that: the swirler is installed at the outer side of the nozzle of the burner.

3. The industrial gas-fired flue gas hot blast stove according to claim 1, characterized in that: the high-quality heat-resistant stainless steel is provided with a high-temperature-resistant coating.