CN221549348U

CN221549348U - Sintering furnace shell and air cooling waste heat recovery device

Info

Publication number: CN221549348U
Application number: CN202323632897.3U
Authority: CN
Inventors: 李功勇; 胡祥龙; 戴煜; 肖乐; 周素阳
Original assignee: HUNAN DINGLI TECHNOLOGY CO LTD
Current assignee: HUNAN DINGLI TECHNOLOGY CO LTD
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-08-16
Anticipated expiration: 2033-12-29

Abstract

The utility model discloses a sintering furnace shell and an air cooling waste heat recovery device, and belongs to the technical field of sintering furnaces. The side wall of the sintering furnace shell is of a hollow wall structure, a plurality of flow guide rib plates are arranged in the hollow wall structure, and the adjacent flow guide rib plates are arranged at two opposite sides in the wall structure in a vertically staggered manner to form an air flow channel; one end of the hollow wall structure is provided with an air inlet, the other end is provided with an air outlet. The air cooling waste heat recovery device comprises the sintering furnace shell, a pipeline, a circulating fan and a heat exchanger; the sintering furnace shell is connected with the circulating fan through the pipeline, and the circulating fan is connected with the heat exchanger through the pipeline. The sintering furnace shell is cooled by gas, so that the problem of liquid leakage does not exist, and the temperature of the furnace shell is safely reduced.

Description

Sintering furnace shell and air cooling waste heat recovery device

Technical Field

The utility model relates to the technical field of sintering furnaces, in particular to a sintering furnace shell and an air cooling waste heat recovery device.

Background

The continuous sintering furnace has the advantages of high yield, low energy consumption, good product consistency and the like.

The common working temperature of the continuous sintering furnace is 1750 ℃, while the traditional furnace adopts a single-layer furnace shell, the outer surface temperature is higher, and the high-temperature expansion deformation of the shell and the failure of sealing materials are easy to occur, so that the gas leakage of the furnace body is caused. In order to reduce the temperature of the furnace shell, some new-structure furnaces adopt a water-cooled furnace shell, and the water leakage risk in the hearth exists although the shell temperature can be effectively reduced. How to safely reduce the temperature of the furnace shell is a problem to be solved in the prior art.

Disclosure of utility model

The utility model aims to overcome the technical defects, and provides a sintering furnace shell and an air cooling waste heat recovery device, which solve the technical problem of how to safely reduce the temperature of a furnace shell in the prior art.

In order to achieve the technical purpose, the technical scheme of the utility model provides a sintering furnace shell, wherein the side wall of the sintering furnace shell is of a hollow wall structure, a plurality of flow guide rib plates are arranged in the hollow wall structure, and the adjacent flow guide rib plates are arranged at two opposite sides in the hollow wall structure in a vertically staggered manner to form air flow channels; one end of the hollow wall structure is provided with an air inlet, the other end is provided with an air outlet.

In some embodiments, the diversion rib plates are steel plates, and the distance between adjacent diversion rib plates is 300-400 mm.

In addition, the utility model also provides an air cooling waste heat recovery device which comprises the sintering furnace shell, a pipeline, a circulating fan and a heat exchanger; the sintering furnace shell is connected with the circulating fan through the pipeline, and the circulating fan is connected with the heat exchanger through the pipeline.

In some embodiments, the heat exchanger comprises a housing, a tube array, a baffle, a water inlet tube, and a water outlet tube; the shell is internally provided with a shell, the guide plate is arranged between the shell and the shell, the water inlet pipe is arranged at the bottom of the shell, the water outlet pipe is arranged at the top of the shell, the air inlet end of the shell is communicated with the circulating fan, and the air outlet end of the shell is communicated with the air inlet of the sintering furnace shell.

In some embodiments, the guide plate is a plurality of arc plates, and adjacent arc plates are distributed on the inner wall of the shell and the outer wall of the tube array in a vertically staggered manner to form a water flow channel.

In some embodiments, the tube array is comprised of a plurality of sub-tube arrays in parallel.

In some embodiments, the heat exchanger further comprises first flanges disposed at the top and bottom ends of the housing, respectively.

In some embodiments, the sintering furnace further comprises a corrugated pipe, wherein the corrugated pipe is arranged between the circulating fan and the sintering furnace shell, and the corrugated pipe is respectively communicated with the sintering furnace shell and the circulating fan through pipelines.

In some embodiments, a valve is also included, the valve being disposed on the conduit between the bellows and the sintering furnace housing.

In some embodiments, the shell is a steel tube and the wall thickness of the shell is 6-10 mm.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a sintering furnace shell, wherein the side wall of the sintering furnace shell is of a hollow wall structure, a plurality of flow guide rib plates are arranged in the hollow wall structure, and the adjacent flow guide rib plates are arranged at two opposite sides of the inside of the wall structure in a vertically staggered manner to form an air flow channel; one end of the hollow wall structure is provided with an air inlet, the other end is provided with an air outlet; the nitrogen enters from the air inlet of the hollow wall structure, fully absorbs the heat of the sintering furnace shell through the air flow channel formed by the flow guide rib plates, and then comes out from the air outlet, so that the problem of liquid water leakage does not exist through gas cooling, and the temperature of the furnace shell is safely reduced.

Drawings

Fig. 1 is a perspective view of a sintering furnace casing according to embodiment 1 of the present utility model.

Fig. 2 is a schematic structural view of a hollow wall structure of a sintering furnace housing according to embodiment 1 of the present utility model.

Fig. 3 is a schematic diagram of the structure of the air-cooled waste heat recovery device according to embodiment 2 of the present utility model.

Fig. 4 is a perspective view of a heat exchanger according to embodiment 2 of the present utility model.

Fig. 5 is a sectional view of the heat exchanger of embodiment 2 of the present utility model.

Reference numerals illustrate: 1. a sintering furnace shell; 11. a hollow wall structure; 111. an air inlet; 112. an air outlet; 12. a diversion rib plate; 13. a second flange; 2. a pipe; 3. a circulating fan; 4. a heat exchanger; 41. a housing; 42. a tube array; 421. a sub-column tube; 43. a deflector; 44. a water inlet pipe; 45. a water outlet pipe; 46. a first flange; 5. a bellows; 6. and (3) a valve.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

With reference to fig. 1-2, this embodiment provides a sintering furnace shell 1, a side wall of the sintering furnace shell 1 is a hollow wall structure 11, a plurality of flow guiding rib plates 12 are arranged in the hollow wall structure 11, and adjacent flow guiding rib plates 12 are arranged at the upper end or the lower end in the hollow wall structure 11 in a vertically staggered manner to form an air flow channel; one end of the hollow wall structure 11 is provided with an air inlet 11, and the other end is provided with an air outlet 112.

On the basis of the embodiment, the flow guiding rib plates 12 are steel plates, the distance between the adjacent flow guiding rib plates 12 is 300-400 mm, the distance can enable gas to flow in the hollow wall structure 11 for a long time, and the heat on the surface of the sintering furnace shell 1 can be fully absorbed.

On the basis of the above embodiment, the sintering furnace housing 1 in the present embodiment has a box-shaped structure, the side wall of the sintering furnace housing 1 includes four hollow wall structures 11, namely, an upper hollow wall structure, a lower hollow wall structure, a left hollow wall structure and a right hollow wall structure, and second flanges 13 are further provided at the inlet and the outlet of the sintering furnace housing 1.

In this embodiment, the inner layer and the outer layer of the hollow wall structure 11 are all continuously full welded, so as to ensure the tightness of the interlayer, the inner layer is made of SUS304, and the outer layer is made of Q235A.

In the embodiment, the pressure of the heat exchange medium nitrogen is 15-20kPa, the internal circulation is carried out, and the circulation flow of the nitrogen in the hollow wall structure 11 is 500-1000 Nm ³/h.

Example 2

Referring to fig. 3 to 5, this embodiment proposes an air-cooled waste heat recovery device, including a sintering furnace housing 1, a pipe 2, a circulating fan 3, and a heat exchanger 4 of embodiment 1; the sintering furnace shell 1 is connected with a circulating fan 3 through a pipeline 2, and the circulating fan 3 is connected with a heat exchanger 4 through the pipeline 2.

The nitrogen enters the hollow wall structure 11 of the sintering furnace shell 1, flows through the labyrinth flow passage, and the surface heat temperature of the nitrogen heat absorption shell 41 is increased to 70-80 ℃. The hot nitrogen gas passes through the circulating fan 3 through the pipeline 2 to reach the heat exchanger 4, the hot nitrogen gas exchanges heat with circulating water through the heat exchanger 4, the temperature of the nitrogen gas is reduced to normal temperature in the heat exchange process, and the cold water is heated to 50-60 ℃. The cooled nitrogen is circulated into the hollow wall structure 11 of the sintering furnace shell 1 again, the next heat exchange cycle is started, the nitrogen absorbing heat can heat cold water in the heat exchanger 4, and the full utilization of heat is realized.

On the basis of the above embodiment, the heat exchanger 4 of the present embodiment includes a housing 41, a tube 42, a baffle 43, a water inlet pipe 44 and a water outlet pipe 45; the shell 41 is located to the tubulation 42, and guide plate 43 locates between shell 41 and the tubulation 42, and inlet tube 44 is equipped with the bottom of shell 41, and outlet pipe 45 locates the top of shell 41, and the inlet end and the circulating fan 3 intercommunication of tubulation 42, the air outlet end and the air inlet 11 intercommunication of fritting furnace casing 1 of tubulation 42. The gas goes away the tubulation 42, and cold water gets into from inlet tube 44, flows out from outlet pipe 45 under the effect of guide plate 43, realizes the heat exchange.

On the basis of the above embodiment, the tube array 42 of the present embodiment is formed by a plurality of sub-tube arrays 421 in parallel, and nitrogen enters from the air inlet ends of the plurality of sub-tube arrays 421 and exits from the air outlet ends, so that the arrangement of the plurality of sub-tube arrays 421 can ensure smooth flow of nitrogen and simultaneously slow down the flow velocity of nitrogen, thereby realizing sufficient heat exchange with water. In this embodiment, the sub-tube 421 is made of T2, and the specification is Φ22×1.

On the basis of the above embodiment, the heat exchanger 4 of the present embodiment further includes the first flange 46, and the first flange 46 is provided at the top end and the bottom end of the housing 41.

On the basis of the above embodiment, the deflector 43 is a plurality of arc plates, and the adjacent arc plates are distributed on the inner wall of the casing 41 and the outer wall of the tube array 42 in a vertically staggered manner to form a water flow channel. Under the action of the arc-shaped plate, the water flow channel is S-shaped, which is beneficial to increasing the heat exchange area of water and nitrogen, thereby realizing more sufficient heat exchange.

In order to slow down the flow rate of nitrogen, the embodiment further comprises a corrugated pipe 5, wherein the corrugated pipe 5 is arranged between the circulating fan 3 and the sintering furnace shell 1, and the corrugated pipe 5 is respectively communicated with the sintering furnace shell 1 and the circulating fan 3 through the pipeline 2.

In order to facilitate the control of the gas circulation, the embodiment also comprises a valve 6, wherein the valve 6 is arranged on the pipeline 2 between the corrugated pipe 5 and the sintering furnace shell 1; the valve 6 of this embodiment is a pneumatic butterfly valve.

Based on the above embodiment, the housing 41 of this embodiment is a steel pipe, and the wall thickness of the housing 41 is 6-10mm. Which is advantageous in extending the service life of the housing 41 and securing safety.

The nitrogen gas of this embodiment may enter from the bottom of the housing 41 or from the top of the housing 41, as shown in fig. 5, and the nitrogen gas flows out from the top of the housing 41 to the bottom opposite to the direction of the inlet water, which is more beneficial to heat exchange.

The sintering furnace shell adopts a double-layer structure type, is cooled by introducing nitrogen, and has low temperature of the outer surface of the shell and reliable structure. Meanwhile, the heat on the surface of the furnace shell is recovered by waste heat, so that energy sources are saved.

The above-described embodiments of the present utility model do not limit the scope of the present utility model. Any other corresponding changes and modifications made in accordance with the technical idea of the present utility model shall be included in the scope of the claims of the present utility model.

Claims

1. The sintering furnace shell is characterized in that the side wall of the sintering furnace shell is of a hollow wall structure, a plurality of flow guide rib plates are arranged in the hollow wall structure, and the adjacent flow guide rib plates are arranged at two opposite sides in the hollow wall structure in a vertically staggered manner to form an air flow channel; one end of the hollow wall structure is provided with an air inlet, the other end is provided with an air outlet.

2. The sintering furnace shell according to claim 1, wherein the diversion rib plates are steel plates, and the distance between adjacent diversion rib plates is 300-400 mm.

3. An air cooling waste heat recovery device, which is characterized by comprising the sintering furnace shell, a pipeline, a circulating fan and a heat exchanger according to claim 1; the sintering furnace shell is connected with the circulating fan through the pipeline, and the circulating fan is connected with the heat exchanger through the pipeline.

4. A gas cooling waste heat recovery device according to claim 3, wherein the heat exchanger comprises a housing, a tube array, a deflector, a water inlet pipe and a water outlet pipe; the shell is internally provided with a shell, the guide plate is arranged between the shell and the shell, the water inlet pipe is arranged at the bottom of the shell, the water outlet pipe is arranged at the top of the shell, the air inlet end of the shell is communicated with the circulating fan, and the air outlet end of the shell is communicated with the sintering furnace shell.

5. The air-cooled waste heat recovery device according to claim 4, wherein the guide plates are a plurality of arc plates, and the adjacent arc plates are distributed on the inner wall of the shell and the outer wall of the tube array in a vertically staggered manner to form a water flow channel.

6. A gas cooling waste heat recovery device according to claim 4, wherein the tube array is constituted by a plurality of sub-tube arrays in parallel.

7. A gas cooled heat recovery device according to claim 4, wherein the heat exchanger further comprises first flanges provided at the top and bottom ends of the housing, respectively.

8. A gas cooling waste heat recovery device according to claim 3, further comprising a bellows provided between the circulating fan and the sintering furnace housing, the bellows being in communication with the sintering furnace housing and the circulating fan, respectively, through pipes.

9. A gas cooling waste heat recovery device according to claim 8, further comprising a valve provided on a pipe between the bellows and the sintering furnace housing.

10. A gas cooling waste heat recovery device according to claim 3, wherein the housing is a steel pipe, and the wall thickness of the housing is 6-10 mm.