A cooling device for utilizing the surface waste heat of a fuming furnace

Abstract

This invention relates to the field of waste heat recovery and utilization technology in metallurgical furnaces and kilns, and proposes a surface waste heat recovery and cooling device for a fuming furnace. The device includes a mounting frame and a flue gas pipe fixedly mounted on the mounting frame. An exchange assembly for heating demineralized water is installed inside the flue gas pipe. An ash removal assembly for removing dust from the flue gas pipe is mounted on the mounting frame. The exchange assembly includes an exchange tube fixedly fitted inside the flue gas pipe, through which demineralized water flows. Both ends of the exchange tube penetrate the flue gas pipe and are fitted with connecting flanges. A retention assembly for extending the time the demineralized water remains in the exchange tube is installed inside the exchange tube. The retention assembly includes a retention shell fixedly installed inside the exchange tube. This invention, through the arrangement of the exchange assembly, converts heat from the flue gas into demineralized water, thereby increasing the inlet water temperature of the deaerator. This reduces the amount of low-pressure steam and the heating time required to heat the demineralized water to 104°C in the deaerator, thus achieving energy saving and consumption reduction.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and utilization technology in metallurgical furnaces and kilns, and in particular to a cooling device for utilizing waste heat on the surface of a fuming furnace. Background Technology

[0002] The economizer outlet flue gas temperature of the fuming furnace boiler is 300-350℃. After the high-temperature flue gas is naturally cooled to 120℃ through a 2000 cubic meter surface cooling pipe, it enters a bag filter dust collector for dust separation. The dust is collected and sold as zinc oxide, while the flue gas is sent to a desulfurization plant to remove SO2 before being discharged into the atmosphere. The waste heat of the medium-temperature flue gas (300-350℃) is not effectively utilized, resulting in heat loss. Furthermore, the large number of surface cooling pipes also affects the negative pressure of the flue gas system. Therefore, we propose a surface waste heat utilization cooling device for the fuming furnace. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of ineffective utilization of waste heat from medium-temperature flue gas, resulting in waste heat loss, and to propose a waste heat utilization and cooling device for the surface of a fuming furnace.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A waste heat recovery and cooling device for a fuming furnace includes a mounting frame and a flue gas pipe fixedly mounted on the mounting frame. The flue gas pipe is equipped with an exchange component for heating demineralized water, and the mounting frame is equipped with an ash removal component for removing dust from the flue gas pipe.

[0006] The exchange assembly includes an exchange pipe fixedly sleeved inside the flue gas pipe, and demineralized water flows in the exchange pipe. Both ends of the exchange pipe penetrate the flue gas pipe and are equipped with connecting flanges. The exchange pipe is provided with a retention component for prolonging the time of demineralized water in the exchange pipe.

[0007] Preferably, the retention component includes a retention shell fixedly installed in the exchange tube, the retention shell is provided with a retention ball, one end of the retention shell is provided with a flow guide port, and the other end is provided with a plurality of liquid outlet holes.

[0008] Preferably, the ash removal assembly includes an ash removal sleeve rotatably mounted on a mounting frame. A fixing ring is coaxially sleeved on the outside of the ash removal sleeve. An impact arc block is rotatably mounted inside the fixing ring. An impact torsion spring with one end fixed to the fixing ring is provided at the rotating end of the impact arc block. A drive assembly for controlling the rotation of the ash removal sleeve is provided on the mounting frame. A material feeding assembly for removing dust is provided at the bottom of the flue pipe.

[0009] Preferably, the feeding assembly includes a feeding pipe fixedly installed at the lower part of the flue gas pipe and communicating with the inner cavity of the flue gas pipe, a rotating sleeve rotatably installed inside the feeding pipe, and a cleaning scraper fixedly installed outside the rotating sleeve.

[0010] Preferably, one end of the feeding pipe is threadedly connected to a feeding screw, one end of the feeding screw is coaxially fixed with a guide block, and the inside of the rotating sleeve is provided with a guide groove that engages with the guide block.

[0011] Preferably, the drive assembly includes a drive wheel coaxially sleeved on the outside of the ash removal sleeve, a drive belt sleeved on the outside of the drive wheel, a drive sleeve rotatably mounted on the mounting bracket, a drive turntable coaxially fixed at one end of the drive sleeve, and a drive belt driving connection at the other end.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention converts the heat in the flue gas into the demineralized water by setting up an exchange component, thereby increasing the inlet water temperature of the deaerator. This reduces the amount of low-pressure steam and heating time required to heat the demineralized water in the deaerator to 104°C, thus achieving the goal of energy saving and consumption reduction.

[0014] 2. By setting up an ash removal component, the present invention cleans the dust adhering in the flue gas pipe, ensuring the flow of flue gas in the flue gas pipe, reducing the impact of the adhering dust on heat exchange, and ensuring the heating of the demineralized water.

[0015] 3. The present invention, through the setting of guide block and guide groove, enables the feeding screw to drive the rotating sleeve to rotate when it is separated from the feeding tube. During the rotation, the cleaning scraper set outside the rotating sleeve will rotate synchronously and come into contact with the dust in the feeding tube, which will accelerate the falling of dust, reduce the probability of "bridging" phenomenon, and improve the efficiency of dust cleaning. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0020] Figure 4 for Figure 2 A magnified structural diagram of region B in the middle.

[0021] In the diagram: 1. Mounting frame; 2. Ash removal assembly; 21. Ash removal sleeve; 22. Fixing ring; 23. Impact arc block; 24. Impact torsion spring; 25. Feeding assembly; 251. Feeding pipe; 252. Rotating sleeve; 253. Cleaning scraper; 254. Guide block; 255. Feeding screw; 26. Drive assembly; 261. Drive wheel; 262. Drive belt; 263. Drive sleeve; 264. Drive turntable; 3. Exchange assembly; 31. Exchange pipe; 32. Retention assembly; 321. Retention shell; 322. Retention ball; 323. Flow guide; 324. Liquid outlet; 33. Connecting flange; 4. Flue gas pipe. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] Reference Figures 1-4 A waste heat recovery cooling device for a fuming furnace includes a mounting frame 1 and a flue gas pipe 4 fixedly mounted on the mounting frame 1. The flue gas pipe 4 contains an exchange component 3 for heating demineralized water. The mounting frame 1 is equipped with an ash removal component 2 for removing dust from the flue gas pipe 4. In use, the mounting frame 1 is first installed on the surface of the fuming furnace using mounting bolts. Then, the exchange component 3 transfers heat from the flue gas to the demineralized water, thereby increasing the inlet water temperature of the deaerator. This reduces the amount of low-pressure steam and heating time required to heat the demineralized water to 104°C, achieving energy saving and consumption reduction. Furthermore, when the flue gas flows through the flue gas pipe 4, some dust carried within it easily adheres to the inside of the flue gas pipe 4, affecting its flow. This solution includes an ash removal component 2 in the mounting frame 1, which can periodically clean the dust in the flue gas pipe 4, ensuring the stability of the flue gas flow within the pipe 4.

[0024] The exchange assembly 3 includes an exchange pipe 31 fixedly sleeved inside the flue gas pipe 4, and demineralized water flows in the exchange pipe 31. Both ends of the exchange pipe 31 pass through the flue gas pipe 4 and are equipped with connecting flanges 33. The exchange pipe 31 is provided with a retention assembly 32 for prolonging the time of the demineralized water in the exchange pipe 31. When this device is in use, the exchange pipe 31 is first connected to the deaerator and external pipeline through the connecting flanges 33. Then, the demineralized water flows through the exchange pipe 31 into the deaerator. During the flow, according to the physical law of heat transfer, the heat in the flue gas will flow into the demineralized water, thereby achieving the effect of heating the demineralized water.

[0025] The retention component 32 includes a retention shell 321 fixedly installed in the exchange pipe 31. A retention ball 322 is provided in the retention shell 321. One end of the retention shell 321 has a guide port 323 and the other end has several outlet holes 324. Under the action of gravity, the retention ball 322 in the retention shell 321 will close the exchange pipe 31 by closing the guide port 323. When the demineralized water enters the exchange pipe 31, it will stop moving forward. However, as the amount of demineralized water increases, the water pressure will also rise. When the water pressure exceeds the weight of the retention ball 322, it will push the retention ball 322 upward, and then the demineralized water will enter the retention shell 321 and flow out from the outlet holes 324. This setting will prolong the time that the demineralized water stays in the exchange pipe 31, thereby increasing the heating time of the demineralized water and thus improving the heating effect of the demineralized water. Example 2

[0026] Reference Figures 1-4 This embodiment is basically the same as Embodiment 1, but with an optimization: the ash removal component 2 includes an ash removal sleeve 21 rotatably mounted on the mounting frame 1. A fixing ring 22 is coaxially sleeved on the outside of the ash removal sleeve 21, and an impact arc block 23 is rotatably mounted inside the fixing ring 22. An impact torsion spring 24 with one end fixed to the fixing ring 22 is provided at the rotating end of the impact arc block 23. A drive component 26 for controlling the rotation of the ash removal sleeve 21 is provided on the mounting frame 1. A feeding component 25 for removing dust is provided at the bottom of the flue gas pipe 4. The presence of dust in the flue gas pipe 4 will affect the flow of flue gas, and the presence of the dust adhesion layer will have a heat insulation effect, which will affect the heating effect of the demineralized water. In this embodiment, the dust removal component 2 can be set to periodically clean the dust in the flue gas pipe 4, reducing the probability of the attached dust affecting heat exchange. During operation, the dust removal sleeve 21 can be controlled to rotate by the drive component 26. When the dust removal sleeve 21 rotates, it will drive the impact arc block 23 mounted on the fixed ring 22 to rotate synchronously. During the rotation, the impact arc block 23 will move outward under the action of centrifugal force, which will then impact the flue gas pipe 4, causing the flue gas pipe 4 to vibrate, causing the attached dust inside to fall down and accumulate at the bottom of the flue gas pipe 4. At this time, the dust can be discharged by the feeding component 25 set at the bottom of the flue gas pipe 4, thus completing the dust removal work.

[0027] The feeding assembly 25 includes a feeding pipe 251 fixedly installed at the lower part of the flue pipe 4 and communicating with the inner cavity of the flue pipe 4. A rotating sleeve 252 is rotatably installed inside the feeding pipe 251, and a cleaning scraper 253 is fixedly installed outside the rotating sleeve 252. When feeding, the feeding pipe 251 can be opened first, and the rotating sleeve 252 can be rotated simultaneously. During the rotation, the cleaning scraper 253 set outside the rotating sleeve 252 will rotate synchronously and come into contact with the dust inside the feeding pipe 251, which accelerates the falling of dust, reduces the probability of "bridging" phenomenon, and improves the efficiency of dust cleaning.

[0028] One end of the feeding pipe 251 is threadedly connected to a feeding screw 255, and one end of the feeding screw 255 is coaxially fixed to a guide block 254. The rotating sleeve 252 has a guide groove inside that engages with the guide block 254. When the feeding pipe 251 is opened, the feeding screw 255 can be directly rotated to disengage it from the feeding pipe 251. During the disengagement process, the guide block 254, which is coaxially fixed to the feeding screw 255, will drive the rotating sleeve 252 to rotate through the cooperation with the guide groove, thereby driving the cleaning scraper 253 to rotate.

[0029] The drive assembly 26 includes a drive wheel 261 coaxially sleeved outside the ash removal sleeve 21, a drive belt 262 sleeved outside the drive wheel 261, and a drive sleeve 263 rotatably mounted on the mounting bracket 1. One end of the drive sleeve 263 is coaxially fixed to a drive turntable 264, and the other end is connected to the drive belt 262. When the ash removal assembly 2 is running, the drive sleeve 263 can be rotated by rotating the drive turntable 264. The drive belt 262 is provided at the upper end of the drive sleeve 263. When rotating, it will drive the drive belt 262 to run synchronously. Through the transmission connection between the drive belt 262 and the drive wheel 261, when the drive turntable 264 rotates, it will drive the ash removal sleeve 21, which is coaxially fixed to the drive wheel 261, to rotate, thereby achieving the effect of the impact arc block 23 continuously impacting the flue gas pipe 4.

[0030] Working principle

[0031] In use, the mounting bracket 1 is first installed on the surface of the flue gas furnace using mounting bolts. Then, the heat in the flue gas is transferred to the demineralized water through the exchange component 3, thereby increasing the inlet water temperature of the deaerator. This reduces the amount of low-pressure steam and heating time required to heat the demineralized water to 104°C, achieving energy saving and consumption reduction. During heating, the exchange pipe 31 is first connected to the deaerator and external pipelines through the connecting flange 33. Then, the demineralized water flows into the deaerator through the exchange pipe 31. During the flow, according to the physical laws of heat transfer, the heat in the flue gas will flow to the demineralized water, thereby achieving the effect of heating the demineralized water. At the same time, the retention balls 322 in the retention shell 321 are under gravity. Under the action of the closed guide port 323, the exchange tube 31 is sealed. When the demineralized water enters the exchange tube 31, it stops moving forward. However, with the increase of demineralized water, the water pressure also rises. When the water pressure exceeds the weight of the retention ball 322, it will push the retention ball 322 upward, and then the demineralized water will enter the retention shell 321 and flow out from the outlet hole 324. This setting will prolong the time of the demineralized water in the exchange tube 31, thereby increasing the heating time of the demineralized water and thus improving the heating effect of the demineralized water. In addition, when the flue gas flows in the flue gas pipe 4, some dust carried in it is easy to adhere to the inside of the flue gas pipe 4 during the flow, affecting the flow of the flue gas in the flue gas pipe 4. In this design, the mounting frame 1 is equipped with a dust removal component 2, which can periodically clean the dust in the flue gas pipe 4, ensuring the stability of the flue gas flow in the flue gas pipe 4. During operation, since the upper end of the drive sleeve 263 is equipped with a drive belt 262, the rotation of the drive sleeve 263 will synchronously drive the drive belt 262 to rotate. Through the transmission connection between the drive belt 262 and the drive wheel 261, the rotation of the drive turntable 264 will drive the dust removal sleeve 21, which is coaxially fixed with the drive wheel 261, to rotate. When the dust removal sleeve 21 rotates, it will drive the impact arc block 23, which is rotatably mounted on the fixed ring 22, to rotate synchronously. During the rotation, the impact arc block 23 will move outward under the action of centrifugal force, which will then impact the flue gas pipe 4, causing the flue gas pipe 4 to vibrate. Dust adhering to the inside of the flue falls downwards and accumulates at the bottom of the flue pipe 4. At this time, the dust can be discharged through the feeding assembly 25 set at the bottom of the flue pipe 4, completing the dust removal work. During feeding, the feeding screw 255 can be directly rotated to disengage it from the feeding pipe 251. During the disengagement process, the guide block 254, which is coaxially fixed with the feeding screw 255, will drive the rotating sleeve 252 to rotate through the cooperation with the guide groove, thereby driving the cleaning scraper 253 to rotate. During the rotation, the cleaning scraper 253 set outside the rotating sleeve 252 will rotate synchronously and come into contact with the dust in the feeding pipe 251, accelerating the falling of dust, reducing the probability of "bridging" phenomenon, and improving the efficiency of dust cleaning.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste heat recovery cooling device for a fuming furnace surface, comprising a mounting frame (1) and a flue gas pipe (4) fixedly mounted on the mounting frame (1), characterized in that: The flue pipe (4) is equipped with an exchange component (3) for heating demineralized water, and the mounting bracket (1) is equipped with an ash removal component (2) for removing dust from the flue pipe (4). The exchange assembly (3) includes an exchange pipe (31) fixedly sleeved inside the flue gas pipe (4), and demineralized water flows in the exchange pipe (31). Both ends of the exchange pipe (31) penetrate the flue gas pipe (4) and are equipped with connecting flanges (33). The exchange pipe (31) is provided with a retention assembly (32) for prolonging the time of demineralized water in the exchange pipe (31). The retention assembly (32) includes a retention housing (321) fixedly installed in the exchange pipe (31), and a retention ball (322) is provided in the retention housing (321). The retention shell (321) has a flow guide (323) at one end and a plurality of liquid outlet holes (324) at the other end.

2. The waste heat recovery and cooling device for a fuming furnace surface according to claim 1, characterized in that: The dust removal assembly (2) includes a dust removal sleeve (21) rotatably mounted on the mounting frame (1). A fixing ring (22) is coaxially sleeved on the outside of the dust removal sleeve (21). An impact arc block (23) is rotatably mounted inside the fixing ring (22). An impact torsion spring (24) with one end fixed to the fixing ring (22) is provided at the rotating end of the impact arc block (23). A drive assembly (26) for controlling the rotation of the dust removal sleeve (21) is provided on the mounting frame (1). A feeding assembly (25) for removing dust is provided at the bottom of the flue gas pipe (4).

3. The waste heat recovery and cooling device for a fuming furnace surface according to claim 2, characterized in that: The feeding assembly (25) includes a feeding pipe (251) fixedly installed at the lower part of the flue pipe (4) and communicating with the inner cavity of the flue pipe (4). A rotating sleeve (252) is rotatably installed inside the feeding pipe (251), and a cleaning scraper (253) is fixedly installed outside the rotating sleeve (252).

4. The waste heat recovery and cooling device for the surface of a fuming furnace according to claim 3, characterized in that: The feeding tube (251) is threaded to one end with a feeding screw (255), and a guide block (254) is coaxially fixed to one end of the feeding screw (255). The rotating sleeve (252) has a guide groove inside that engages with the guide block (254).

5. The waste heat recovery and cooling device for the surface of a fuming furnace according to claim 2, characterized in that: The drive assembly (26) includes a drive wheel (261) coaxially sleeved outside the ash removal sleeve (21), and a drive belt (262) is sleeved outside the drive wheel (261).

6. The waste heat recovery and cooling device for the surface of a fuming furnace according to claim 5, characterized in that: A drive sleeve (263) is rotatably mounted on the mounting bracket (1). One end of the drive sleeve (263) is coaxially fixed with a drive turntable (264), and the other end is connected to the drive belt (262) for transmission.

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