Vertical waste heat recovery device for high-temperature sintered ore

Abstract

The utility model discloses a high-temperature sinter vertical waste heat recovery device in the technical field of sinter waste heat recovery, which comprises a waste heat recovery furnace and a superheater, the superheater is attached to the outer wall of the waste heat recovery furnace, an inlet of the superheater is connected with a steam outlet of a waste heat boiler, and an outlet of the superheater is connected with a steam outlet of the waste heat boiler. And the steam temperature is further increased by utilizing the furnace wall temperature of the waste heat recovery furnace.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering ore waste heat recovery technical field, concretely relates to a high temperature sintering ore vertical waste heat recovery device. BACKGROUND

[0002] The latest research of high temperature sintering ore waste heat recovery in steel industry is to use shaft furnace to cool and exchange heat. The shaft furnace cooling technology draws lessons from the structure of dry quenching process, and greatly improves the heat quality of cooling gas, that is, high temperature flue gas, through the reverse gas-solid heat exchange of high temperature sintering ore and cooling air. The sintering ore in the device slowly moves from the upper part, the cooling air is sent from the bottom, and is uniformly distributed to the cooling section through a specific air duct, and high-efficiency heat exchange is realized with the ore. The cooling gas gradually warms up, and can reach a high temperature of more than 500 DEG C after multi-stage treatment, which is used for subsequent waste heat power generation or other industrial applications.

[0003] No matter whether it is a circular shaft furnace or a square shaft furnace, an adiabatic insulation frame is arranged around it. In the cooling section, when the high temperature sintering ore exchanges heat with the cooling air, the wall surface will also be heated due to the radiation heat of the high temperature sintering ore. Although the design of the adiabatic insulation frame prevents part of the heat from being lost, the heat absorbed by the wall surface is not effectively recycled. In addition, due to the design of the adiabatic insulation, and the high temperature inside the furnace wall, the heat of the high temperature sintering ore in the furnace cannot be dissipated through the furnace wall, which also affects the overall cooling effect of the hot sintering ore. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a high temperature sintering ore vertical waste heat recovery device to solve the technical problem that the adiabatic insulation frame outside the shaft furnace hinders the heat recovery of the furnace wall and affects the overall cooling effect of the hot sintering ore in the prior art.

[0005] To solve the above technical problems, the utility model provides a high temperature sintering ore vertical waste heat recovery device, which comprises a waste heat recovery furnace and a superheater. The superheater is installed on the outer wall of the waste heat recovery furnace. The inlet of the superheater is connected with the steam outlet of the waste heat boiler, so as to further improve the steam temperature by using the furnace wall temperature of the waste heat recovery furnace.

[0006] As a preferred scheme of the utility model, the superheater is a continuous s-shaped bent pipe surrounding the outer wall of the waste heat recovery furnace.

[0007] As a preferred scheme of the utility model, the waste heat recovery furnace comprises a furnace body, and the top and bottom of the furnace body are respectively provided with a feeding port and a discharging port.

[0008] The lower part of the furnace body is provided with an air duct, and the two ends of the air duct are respectively communicated with a blower located outside the furnace body and a blast cap located inside the furnace body, so as to blow the cooling air into the furnace body.

[0009] As a preferred scheme of the utility model, the air duct is arranged as a cross-shaped pipe, the air cap is installed at the intersection of the cross-shaped pipe, and a plurality of air injection holes are arranged on the air cap.

[0010] As a preferred scheme of the utility model, an annular shell is fixedly arranged at the upper outer side of the furnace body, an annular air channel is formed between the annular shell and the outer wall of the furnace body, an inclined upward channel is arranged on the furnace body and communicates with the annular air channel, and a cooling air outlet is arranged on one side of the annular shell.

[0011] As a preferred scheme of the utility model, the superheater is arranged in the annular air channel and is installed in close contact with the furnace wall.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] By installing the superheater on the outer wall of the waste heat recovery furnace, connecting the steam outlet of the waste heat boiler with the inlet of the superheater, and allowing the heat absorbed by the furnace wall of the waste heat recovery furnace to be conducted to the steam in the superheater, the heat dissipation of the furnace wall is converted into high-temperature steam, more sufficient heat recovery is realized, the system heat energy utilization rate is greatly improved, the furnace wall temperature is reduced, the heat exchange coefficient of the furnace wall and the sintered ore is enhanced, and the cooling effect on the high-temperature sintered ore is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0015] Figure 1 The structural schematic diagram of one embodiment of the utility model.

[0016] The numbers in the drawings represent the following respectively:

[0017] 1-waste heat recovery furnace, 2-superheater, 3-feeding port, 4-discharging port, 5-air duct, 6-air cap, 7-annular shell, 8-annular air channel, 9-cooling air outlet. DETAILED DESCRIPTION

[0018] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.

[0019] The utility model provides a kind of high-temperature sinter vertical type waste heat recovery device, including waste heat recovery furnace 1 and superheater 2, superheater 2 is attached to the outer wall of waste heat recovery furnace 1 installation, the inlet of superheater 2 is connected with the steam outlet of waste heat boiler, to utilize the wall temperature of waste heat recovery furnace 1 to further improve steam temperature.

[0020] By installing superheater 2 on the outer wall of waste heat recovery furnace 1, the steam outlet of waste heat boiler is connected with the inlet of superheater 2, the heat absorbed by the wall of waste heat recovery furnace 1 will be conducted to the steam in superheater 2, the heat loss of wall is converted into high-temperature steam, realizes more sufficient heat recovery, greatly improves system heat energy utilization rate;While reducing the wall temperature, enhancing the heat exchange coefficient of wall and sinter, improving the cooling effect of high-temperature sinter.

[0021] Further, superheater 2 is continuous s-shaped bent pipe around the outer wall of waste heat recovery furnace 1, which can prolong the flow path of steam in superheater 2, so that steam and wall are fully heat exchanged.

[0022] Further, waste heat recovery furnace 1 includes furnace body, and the top and bottom of furnace body are respectively provided with feeding port 3 and discharging port 4;

[0023] The lower part of furnace body is provided with air duct 5, and the two ends of air duct 5 are respectively communicated with air blower located outside furnace body and air cap 6 located inside furnace body, so as to blow cooling air into furnace body.

[0024] The above-mentioned air duct 5 can be provided as cross-shaped pipe, and air pipe is inserted into furnace body from outside, and one end located inside furnace body is connected with air cap 6, and the other end located outside furnace body is connected with air blower;The air cap 6 is installed at the intersection of cross-shaped pipe, and a plurality of air injection holes are provided on the air cap 6, so that cooling air flow can be uniformly dispersed, and cooling effect can be improved.

[0025] High-temperature sinter enters furnace body from feeding port 3 at the top of waste heat recovery furnace 1, and falls downward under the action of gravity, and finally leaves furnace body from discharging port 4 at the bottom. Cooling air enters furnace body through air duct 5 and air cap 6, and is blown from the lower part of furnace body to the upper part, so as to cool and cool the high-temperature sinter falling from the upper part.

[0026] Further, an annular shell 7 is fixedly arranged on the upper outer side of the furnace body, and an annular air channel 8 is formed between the annular shell 7 and the outer wall of the furnace body. An upwardly inclined channel is arranged on the furnace body and communicates with the annular air channel 8. The annular shell 7 is provided with a cooling air outlet 9 on one side. The annular shell 7 can be fixed on the furnace body by welding.

[0027] After the cooling air blown from the lower part of the furnace body cools the high-temperature sintered ore, the high-temperature sintered ore enters the annular air channel 8 outside the furnace body and is discharged from the furnace body through the cooling air outlet 9. The discharged high-temperature gas can be used for subsequent waste heat power generation or other industrial applications, realizing energy recycling.

[0028] Further, the superheater 2 can be installed on the lower part of the furnace body, but considering that the temperature of the upper part of the furnace body is higher, the superheater 2 is arranged on the upper part of the furnace body. On the one hand, this can improve the heat energy conversion amount of the furnace wall and the steam, and on the other hand, it can improve the cooling effect of the high-temperature sintered ore. Because the annular air channel 8 has been installed on the upper part of the furnace body, the superheater 2 is arranged in the annular air channel 8 and is installed in close contact with the furnace wall.

[0029] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the present application.

Claims

1. A vertical waste heat recovery device for high-temperature sintered ore, characterized in that, It includes a waste heat recovery furnace (1) and a superheater (2). The superheater (2) is installed in contact with the outer wall of the waste heat recovery furnace (1). The inlet of the superheater (2) is connected to the steam outlet of the waste heat boiler to further increase the steam temperature by utilizing the furnace wall temperature of the waste heat recovery furnace (1).

2. The high-temperature sintered ore vertical waste heat recovery device according to claim 1, characterized in that, The superheater (2) is a continuous S-shaped bend that surrounds the outer wall of the waste heat recovery furnace (1).

3. The high-temperature sintered ore vertical waste heat recovery device according to claim 1, characterized in that, The waste heat recovery furnace (1) includes a furnace body, and the top and bottom of the furnace body are respectively provided with a feed inlet (3) and a discharge outlet (4); The lower part of the furnace body is provided with an air duct (5), and the two ends of the air duct (5) are respectively connected to a blower located outside the furnace body and an air cap (6) located inside the furnace body, so as to blow cooling air into the furnace body.

4. A high-temperature sintered ore vertical waste heat recovery device according to claim 3, characterized in that, The air duct (5) is configured as a cross-shaped pipe, the air cap (6) is installed at the intersection of the cross-shaped pipe, and the air cap (6) is provided with multiple air jet holes.

5. A high-temperature sintered ore vertical waste heat recovery device according to claim 3, characterized in that, An annular shell (7) is fixedly installed on the upper outer side of the furnace body. An annular air passage (8) is formed between the annular shell (7) and the outer wall of the furnace body. An inclined upward channel communicating with the annular air passage (8) is provided on the furnace body. A cooling air outlet (9) is provided on one side of the annular shell (7).

6. A high-temperature sintered ore vertical waste heat recovery device according to claim 5, characterized in that, The superheater (2) is disposed in the annular gas passage (8) and is installed in close contact with the furnace wall.

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