CN219757089U

CN219757089U - Main iron runner waste heat utilization device of cast house

Info

Publication number: CN219757089U
Application number: CN202321324655.5U
Authority: CN
Inventors: 刘海金; 郭戌; 昝日安; 吴志宏; 王春龙
Original assignee: Capital Engineering & Research Inc Ltd
Current assignee: Capital Engineering & Research Inc Ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-09-26
Anticipated expiration: 2033-05-29

Abstract

The utility model discloses a main iron runner waste heat utilization device of a cast house, which relates to the technical field of metallurgy, and comprises: a main iron runner housing; a plurality of first conduits disposed within the main iron runner housing; the first pipeline is connected with the conveying pipeline, and the conveying pipeline is used for being communicated with a main combustion air pipe in front of a heat exchanger of the hot blast stove; a temperature measurement for measuring the temperature of air at the outlet of the first duct; the outlet of the air blowing device is communicated with the inlet of the first pipeline; and the control unit is electrically connected with the temperature measuring piece and the air blowing device and controls the air blowing device based on the temperature measuring piece. The utility model can recycle the heat lost by the molten iron on the basis of prolonging the service life of the refractory material.

Description

Main iron runner waste heat utilization device of cast house

Technical Field

The utility model relates to the technical field of metallurgy, in particular to a main iron runner waste heat utilization device of a cast house.

Background

In the metallurgical industry, heat emitted in the steel smelting process is isolated by refractory materials, particularly the main iron runner area of a blast furnace cast house, and under the action of high-temperature molten iron and slag, the refractory materials on the inner side surface and the bottom surface of the runner shell are severely corroded, so that the effective protection cannot be obtained. Meanwhile, in the tapping process of the blast furnace, the heat loss of the molten iron is serious, and part of the heat cannot be effectively utilized, so that energy waste is caused.

In the prior art, a side wall and an air duct are designed on a main iron runner body, and in the technology, a certain air flow is introduced into the side wall of the main iron runner to reduce the temperature of the main iron runner, so that the service time of a refractory material is prolonged. Under the condition of using the technology, the refractory material in the ditch shell can be cooled to a certain degree, so that the loss of the refractory material is slowed down, and the replacement frequency of the refractory material is reduced. However, the above scheme still does not make secondary use of the waste heat after heat exchange, and has certain drawbacks. Therefore, no good solution is available for the problem of heat loss of the main runner hot metal in the tapping process.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical problem to be solved by the embodiment of the utility model is to provide a main iron runner waste heat utilization device for a cast house, which can recycle the heat lost by molten iron on the basis of prolonging the service life of refractory materials.

The specific technical scheme of the embodiment of the utility model is as follows:

a cast house main tap hole waste heat utilization device, the cast house main tap hole waste heat utilization device comprising:

a main iron runner housing;

a plurality of first conduits disposed within the main iron runner housing;

the first pipeline is connected with the conveying pipeline, and the conveying pipeline is used for being communicated with a main combustion air pipe in front of a heat exchanger of the hot blast stove;

a temperature measurement for measuring the temperature of air at the outlet of the first duct;

the outlet of the air blowing device is communicated with the inlet of the first pipeline;

and the control unit is electrically connected with the temperature measuring piece and the air blowing device and controls the air blowing device based on the temperature measuring piece.

Preferably, the tapping field main iron runner waste heat utilization device comprises:

an air inlet pipeline and an air outlet pipeline;

the main iron runner shell is provided with a first end and a second end which are opposite, the first end of the main iron runner shell is provided with a flow dividing piece, and the flow dividing piece is used for connecting a plurality of first pipelines with the air inlet pipeline; the second end of the main runner shell is provided with a converging piece, and the converging piece connects a plurality of first pipelines with the air outlet pipeline.

Preferably, the main runner housing has a bottom wall and two opposite side walls, the first conduit being disposed within the bottom wall, the side walls;

the extending direction of the first pipeline is the same as the extending direction of the main iron runner shell.

Preferably, the first pipes have an inner diameter ranging from 50mm to 200mm, and the distance between adjacent first pipes is 1 to 3 times the inner diameter of the first pipes.

Preferably, the first pipe is made of a heat-resistant metal material having high heat conductivity.

Preferably, one end of the conveying pipeline is connected with the air outlet pipeline, the other end of the conveying pipeline is used for being connected with a combustion air main pipe in front of a heat exchanger of the hot blast stove, and an opening and closing valve is arranged at the tail end of the conveying pipeline.

Preferably, the split piece is of a hollow box body structure, the cross section of the split piece is matched with that of the main runner shell, one side of the split piece is connected with a plurality of first pipelines, and the other side of the split piece is connected with the air inlet pipeline.

Preferably, the converging piece is of a hollow box structure, the cross section of the converging piece is matched with that of the main runner shell, one side of the converging piece is connected with a plurality of first pipelines, and the other side of the converging piece is connected with the air outlet pipeline.

Preferably, the main tap hole waste heat utilization device of the cast house further comprises:

the combustion air main pipe is communicated with the hot blast stove, the heat exchanger is arranged on the combustion air main pipe, and the conveying pipeline is connected with the combustion air main pipe at the upstream of the heat exchanger.

Preferably, the temperature measuring member is provided at the air outlet duct.

The technical scheme of the utility model has the following remarkable beneficial effects:

the main iron runner waste heat utilization device of the cast house exchanges heat with the main iron runner shell through air, so that the erosion of the inner side wall of the main iron runner shell is greatly reduced, the service life of the refractory material of the main iron runner shell is prolonged, and the replacement frequency of the refractory material is reduced. The heated air obtained by waste heat recovery is reused in the combustion air main pipe of the hot blast stove, so that the gas consumption of the hot blast stove can be reduced, the purposes of energy conservation, emission reduction and cost reduction are achieved, and the hot blast stove is more friendly to the environment.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be.

FIG. 1 is a schematic perspective view of a main runner casing according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a main runner housing according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of the connection of the delivery duct to the main combustion air duct in front of the heat exchanger of the stove according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of the connection of the delivery duct with the main combustion air duct in front of the heat exchanger of the stove according to an embodiment of the utility model.

Reference numerals of the above drawings:

1. a main iron runner housing; 2. a first pipe; 3. a delivery conduit; 4. a temperature measuring member; 5. an air inlet pipeline; 6. an air outlet pipeline; 7. a shunt; 8. a confluence member; 9. an opening/closing valve; 10. a combustion air main pipe; 11. a heat exchanger.

Detailed Description

The details of the utility model will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the utility model. However, the specific embodiments of the utility model described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Given the teachings of the present utility model, one of ordinary skill in the related art will contemplate any possible modification based on the present utility model, and such should be considered to be within the scope of the present utility model. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to recycle heat lost from molten iron on the basis of prolonging the service life of refractory materials, the utility model provides a main iron runner waste heat utilization device of a cast house, fig. 1 is a schematic perspective view of a main iron runner shell in an embodiment of the utility model, fig. 2 is a schematic cross-sectional view of the main iron runner shell in the embodiment of the utility model, fig. 3 is a schematic perspective view of a connection of a conveying pipeline and a main combustion air pipe in front of a heat exchanger of a hot blast stove in the embodiment of the utility model, and fig. 4 is a schematic cross-sectional view of the connection of the conveying pipeline and the main combustion air pipe in front of the heat exchanger of the hot blast stove in the embodiment of the utility model, as shown in fig. 1 to 4, the main iron runner waste heat utilization device of the cast house can comprise: a main runner housing 1; a plurality of first pipes 2 provided in the main runner casing 1; the conveying pipeline 3, the first pipeline 2 is connected with the conveying pipeline 3, and the conveying pipeline 3 is used for communicating with a combustion air main pipe 10 in front of a heat exchanger 11 of the hot blast stove; a temperature measuring member 4 for measuring the temperature of the air at the outlet of the first duct 2; the outlet of the air blowing device is communicated with the inlet of the first pipeline 2; and the control unit is electrically connected with the temperature measuring piece 4 and the air blowing device, and controls the air blowing device based on the temperature measuring piece 4.

The main runner housing 1 is generally made of refractory material. As shown in fig. 1 and 2, the main runner housing 1 may have a bottom wall and two opposite side walls, with the first conduit 2 disposed within the bottom wall, side walls. The bottom wall and the opposite side walls of the main runner housing 1 form a runner through which the molten iron flows. A plurality of first pipes 2 are arranged distributed in the bottom wall and the opposite two side walls of the main runner casing 1. The gas, such as air, flowing through the first pipe 2 may exchange heat with the main runner casing 1, thereby raising the temperature of the gas flowing through the first pipe 2. The extending direction of the first pipe 2 is the same as the extending direction of the main runner casing 1, so that the heat exchange area between the first pipe 2 and the main runner casing 1 can be increased.

As a practical matter, the inner diameter of the first pipes 2 ranges between 50mm and 200mm, and the spacing between adjacent first pipes 2 is between 1 and 3 times the inner diameter of the first pipes 2. The strength of the main iron runner housing 1 is also ensured at the same time by the above structure while the number of the first pipes 2 is ensured.

In order to increase the amount of heat exchange between the heat of the main runner housing 1 and the gas flowing through the first pipe 2, the first pipe 2 may be made of a heat-resistant metal material having high thermal conductivity. Further, the metal material may be selected from light metal materials.

As a possible possibility, as shown in fig. 1 and 2, the cast house main runner waste heat utilization apparatus may include: an air inlet pipeline 5 and an air outlet pipeline 6. The blower device may be connected to the air intake duct 5. The main iron runner casing 1 is provided with a first end and a second end which are opposite, the first end of the main iron runner casing 1 is provided with a splitter 7, and the splitter 7 connects a plurality of first pipelines 2 with the air inlet pipeline 5; the second end of the main runner housing 1 is provided with a converging member 8, and the converging member 8 connects the plurality of first pipelines 2 with the air outlet pipeline 6.

In order to be able to measure more accurately the average temperature of all the gases after heating up the plurality of first pipes 2, further, a temperature measuring member 4 may be provided at the outlet pipe 6.

As a possible way, as shown in fig. 1 and 2, the diverter 7 may be a hollow box structure, the cross section of which matches the cross section of the main runner casing 1, one side of the diverter 7 is connected to the plurality of first pipes 2, and the other side of the diverter 7 is connected to the air intake pipe 5, so that the air blown by the blower toward the air intake pipe 5 is diverted into the plurality of first pipes 2 through the diverter 7.

As a possible way, the converging member 8 may be a hollow box structure, the cross section of which is matched with the cross section of the main runner casing 1, one side of the converging member 8 is connected with the plurality of first pipelines 2, and the other side of the converging member 8 is connected with the air outlet pipeline 6, so that the air in the plurality of first pipelines 2 after heat exchange and temperature rise is converged into the air outlet pipeline 6.

As a practical matter, the outside of the conveying pipeline 3 is wrapped with a heat-insulating material, such as a rock wool heat-insulating layer, so as to insulate the conveying pipeline 3 and reduce the heat loss of the internal gas.

As is possible, as shown in fig. 3 and 4, one end of the transfer duct 3 is connected to the outlet duct 6, the other end of the transfer duct 3 is adapted to be connected to a main combustion air duct 10 in front of a heat exchanger 11 of the stove, and an on-off valve 9 is provided at the end of the transfer duct 3. When the warmed gas is not fed to the main combustion air pipe 10 through the feed pipe 3, the feed pipe 3 can be closed by the on-off valve 9, thereby preventing cold air in the main combustion air pipe 10 from flowing backward to the first pipe 2.

Further, as shown in fig. 3 and 4, the cast house main runner waste heat utilization device may include: the combustion air main pipe 10 is communicated with the hot blast stove, the heat exchanger 11 is arranged on the combustion air main pipe 10, and the conveying pipeline 3 is connected with the combustion air main pipe 10 at the upstream of the heat exchanger 11.

According to the main iron runner waste heat utilization device of the cast house, air is blown into the air inlet pipeline 5 by the air blowing device, the air in the air inlet pipeline 5 is split into the first pipelines 2 in the main iron runner shell 1 through the splitter 7, the main iron runner shell 1 is affected by high-temperature molten iron and slag, the heat of the hot water is transferred to the main iron runner shell 1, and the air exchanges heat with the main iron runner shell 1 in the first pipelines 2, so that the temperature is increased, and the main iron runner shell 1 is cooled to a certain extent. The air with the increased temperature flows out of the first duct 2 and is collected into the air outlet duct 6 through the collecting member 8. The air with the raised temperature is conveyed to a combustion air main pipe 10 in front of a heat exchanger 11 of the hot blast stove through a conveying pipeline 3, is mixed with the gas of the combustion air main pipe 10, is further heated through the heat exchanger 11 and is finally conveyed to the hot blast stove. In the above process, the control unit may control the blowing device by using the temperature of the air at the outlet of the first pipe 2 measured by the temperature measuring part 4, and control the amount of the air delivered by the blowing device so as to control the temperature of the air at the outlet of the first pipe 2 to be within a proper range. And then, the temperature of the iron discharged from the main runner shell 1 is correspondingly matched with the air delivery of the air blowing device, so that the air delivery required by the air blowing device can be directly determined according to the different temperatures of the iron discharged from the main runner shell 1.

According to the main iron runner waste heat utilization device of the cast house, heat exchange is carried out between air and the main iron runner shell 1, so that erosion of the inner side wall of the main iron runner shell 1 is greatly reduced, the service life of refractory materials of the main iron runner shell 1 is prolonged, and the replacement frequency of the refractory materials is reduced. The heated air obtained by waste heat recovery is reused in the combustion air main pipe 10 of the hot blast stove, so that the gas consumption of the hot blast stove can be reduced, the purposes of energy conservation, emission reduction and cost reduction are achieved, and the hot blast stove is more friendly to the environment.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

The foregoing is merely a few embodiments of the present utility model, and the embodiments disclosed in the present utility model are merely examples which are used for the convenience of understanding the present utility model and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail of the embodiments without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims

1. The utility model provides a cast house owner's tap hole waste heat utilization equipment which characterized in that, the cast house owner's tap hole waste heat utilization equipment includes:

a main iron runner housing;

a plurality of first conduits disposed within the main iron runner housing;

2. The cast house main tap hole waste heat utilization device according to claim 1, wherein the cast house main tap hole waste heat utilization device comprises:

an air inlet pipeline and an air outlet pipeline;

3. The cast house main runner waste heat utilization apparatus of claim 1, wherein the main runner housing has a bottom wall and two opposite side walls, the first conduit being disposed within the bottom wall and the side walls;

4. The cast house main iron runner waste heat utilization device according to claim 1, wherein the inner diameter of the first pipeline ranges from 50mm to 200mm, and the distance between adjacent first pipelines is 1 to 3 times the inner diameter of the first pipeline.

5. The cast house main runner waste heat utilization apparatus according to claim 1, wherein the first pipe is made of a heat resistant metal material having high heat conductivity.

6. The cast house main iron runner waste heat utilization device according to claim 2, wherein one end of the conveying pipeline is connected with the air outlet pipeline, the other end of the conveying pipeline is used for being connected with a combustion air main pipe in front of a heat exchanger of the hot blast stove, and an opening and closing valve is arranged at the tail end of the conveying pipeline.

7. The cast house main runner waste heat utilization device according to claim 2, wherein the split piece is of a hollow box body structure, the cross section of the split piece is matched with that of the main runner shell, one side of the split piece is connected with a plurality of first pipelines, and the other side of the split piece is connected with the air inlet pipeline.

8. The cast house main runner waste heat utilization device according to claim 2, wherein the converging piece is of a hollow box structure, the cross section of the converging piece is matched with that of the main runner shell, one side of the converging piece is connected with a plurality of first pipelines, and the other side of the converging piece is connected with the air outlet pipeline.

9. The cast house main tap hole waste heat utilization device according to claim 1, further comprising:

10. The cast house main iron runner waste heat utilization device according to claim 2, wherein the temperature measuring member is provided at the air outlet pipe.