A waste heat recovery device for blast furnace slag flushing water

Abstract

The utility model provides a waste heat recovery device for blast furnace slag flushing water, comprising a waste heat recovery box for recovering heat in filtered blast furnace slag flushing water, a mounting groove is opened on the top of the waste heat recovery box, a fixing plate is arranged in the mounting groove, a curved heat exchange tube is inserted on the fixing plate, a height-adjustable cleaning and recovery mechanism for scraping and collecting scale on the outer wall of the curved heat exchange tube is arranged on the curved heat exchange tube, the cleaning and recovery mechanism comprises a cleaning component arranged on the outer wall of the curved heat exchange tube and a recovery component sleeved on the outer wall of the curved heat exchange tube and located below the cleaning component for recovering scale scraped off by the cleaning component; the utility model can realize scraping and collecting most of the scale scraped off the outer surface of the curved heat exchange tube through the cleaning and recovery mechanism, avoids a large amount of scale directly falling and remaining in the preheating recovery box, and ensures the subsequent heat exchange efficiency of the curved heat exchange tube.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery equipment, in particular to a waste heat recovery device for blast furnace slag flushing water. Background Art

[0002] During the blast furnace production process, molten slag at about 1500℃ is produced. The existing slag treatment method is mainly water quenching and granulation. During the water quenching and granulation process, hot water is produced, which is called slag flushing water, and the slag flushing water contains a lot of heat.

[0003] At present, the slag flushing water of iron-making blast furnace generally contains a large amount of heat, which will be recovered through the waste heat recovery device. During the heat recovery, the slag flushing water is generally collected directly into the heat exchange device for heat exchange recovery. However, due to the fast flow rate and short residence time of the slag flushing water in the heat exchange device, the heat exchange effect of the heat exchange device is poor. At the same time, the heat exchange tubes inside the heat exchange device are prone to scale formation, which further affects the heat exchange effect.

[0004] The Chinese utility model patent with the authorization announcement number: CN219284017U discloses a device for recovering waste heat from slag water of an ironmaking blast furnace, including a waste heat recovery box, a sealing plate is provided on one side of the waste heat recovery box, a water inlet box is provided on one side of the top of the waste heat recovery box, a filter screen is installed inside the water inlet box, a connecting pipe is connected between the filter screen and the water inlet box, and a heat recovery mechanism is provided inside the waste heat recovery box; the heat recovery mechanism includes a curved heat exchange tube, and the curved heat exchange tube is installed inside the waste heat recovery box. The utility model can effectively improve the heat exchange effect by providing a heat recovery mechanism and a moving mechanism, and at the same time, the curved heat exchange tube is driven to move by a hydraulic rod, so that the scraper ring scrapes off the scale on the outer surface of the curved heat exchange tube, which can prevent the scale from affecting the heat exchange efficiency and heat exchange effect of the curved heat exchange tube, and further improve the heat recovery effect and recovery efficiency.

[0005] Although the technical solution in the above patent can scrape off the scale on the outer surface of the curved heat exchange tube by a scraper ring, a large amount of scraped scale will directly fall and remain in the preheating recovery box, making subsequent cleaning more troublesome and affecting the subsequent heat exchange efficiency of the curved heat exchange tube. Utility Model Content

[0006] In view of this, the utility model provides a waste heat recovery device for blast furnace slag flushing water, which can scrape and collect most of the scale scraped off the outer surface of the curved heat exchange tube through a cleaning recovery mechanism, avoiding a large amount of scale directly falling and remaining in the preheating recovery box, thereby ensuring the subsequent heat exchange efficiency of the curved heat exchange tube.

[0007] In order to solve the above technical problems, the utility model provides a waste heat recovery device for blast furnace slag flushing water, including a waste heat recovery box for recovering heat in filtered blast furnace slag flushing water, a mounting groove is opened on the top of the waste heat recovery box, a fixing plate is arranged in the mounting groove, a curved heat exchange tube is inserted on the fixing plate, a height-adjustable cleaning and recovery mechanism for scraping and collecting scale on the outer wall of the curved heat exchange tube is arranged on the curved heat exchange tube, the cleaning and recovery mechanism comprises a cleaning component arranged on the outer wall of the curved heat exchange tube and a recovery component sleeved on the outer wall of the curved heat exchange tube and located below the cleaning component for recovering the scale scraped off by the cleaning component, the utility model can scrape off the scale above the outer wall of the curved heat exchange tube by the cleaning component in the height-adjustable cleaning and recovery mechanism, and recover the scraped scale by the recovery component, so as to avoid a large amount of scale directly falling and remaining in the preheating recovery box, thereby ensuring the subsequent heat exchange efficiency of the curved heat exchange tube.

[0008] The cleaning assembly includes a scraper ring that is slidably arranged on the outside of the vertical part of the curved heat exchange tube. A fixed sleeve is arranged on the outside of the scraper ring. The scraper ring should be made of hard high-temperature resistant rubber material with a certain taper, which can ensure that the scale can be easily scraped off and avoid scratching the outer wall of the curved heat exchange tube, which is safer and more convenient. The fixed sleeve is used to fix and limit the scraper ring.

[0009] The recovery component includes a filter box slidably arranged on the curved heat exchange tube, the fixed sleeve is located at the bottom of the filter box, a plurality of filter holes are provided on the outer wall of the filter box, and through holes for the outer wall of the serpentine heat exchange tube to pass through are provided on the upper outer wall and the lower outer wall of the filter box. The utility model can ensure the smooth passage of water through the filter holes on the filter box while preventing the scraped scale from escaping and entering the waste heat recovery box under the impact of the water flow, which is safer, more convenient and convenient for subsequent cleaning of the scale.

[0010] A telescopic push rod is provided on the upper part of the filter box, and the telescopic push rod is any one of a hydraulic telescopic rod, a pneumatic telescopic rod or an electric telescopic rod. The output rod end of the telescopic push rod is fixedly arranged together with the upper part of the filter box, and the fixed end of the telescopic push rod is arranged on the outer wall of the fixing plate, and a mounting plate is arranged on the outer wall of the fixing plate, and the mounting plate is fixedly arranged on the upper outer wall of the waste heat recovery box by bolts. The utility model can move the filter box and the scraper ring inside the filter box up and down under the action of the extension and retraction of the output rod of the telescopic push rod, thereby scraping off the scale on the outer wall of the curved heat exchange tube, and the scraped scale will remain in the filter box under the obstruction of the filter box. After the scraping is completed, the output rod of the telescopic push rod is started to retract to move upward with the filter box and the scraper ring, and then the mounting plate can be removed to realize the removal of the fixing plate and the filter recovery mechanism into the preheating recovery box, so as to facilitate the cleaning of the scale inside the filter recovery box.

[0011] A sealing gasket is arranged on the outer side wall of the vertical part of the fixed plate. The sealing gasket is made of a non-slip, wear-resistant and high-temperature resistant rubber material. The sealing gasket can increase the sealing performance between the fixed plate and the waste heat recovery box to avoid unnecessary heat dissipation.

[0012] A water inlet is provided at the top of the waste heat recovery box, and a drain outlet is provided at the bottom of the waste heat recovery box. The utility model can introduce high-temperature water into the waste heat recovery box through the water inlet, so that it can preheat the cold water inside the curved heat exchange tube, and guide the water with lowered temperature through the drain outlet to other processes to participate in the work, which is more convenient to operate.

[0013] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0014] 1. The utility model can scrape off the scale on the outer wall of the curved heat exchange tube through the cleaning component in the height-adjustable cleaning and recovery mechanism, and recycle the scraped scale through the recovery component, so as to avoid a large amount of scale directly falling and remaining in the preheating recovery box, thereby ensuring the subsequent heat exchange efficiency of the curved heat exchange tube.

[0015] 2. The scraper ring should be made of hard high-temperature resistant rubber material with a certain taper, which can ensure that the scale can be easily scraped off and avoid scratching the outer wall of the curved heat exchange tube, which is safer and more convenient. The fixing sleeve is used to fix and limit the scraper ring.

[0016] 3. The utility model can ensure the smooth passage of water through the filter holes on the filter box while preventing the scraped scale from scattering around under the impact of the water flow and being mixed into the waste heat recovery box, which is safer, more convenient and facilitates the subsequent cleaning of the scale.

[0017] 4. The utility model can move the filter box and the scraper ring inside the filter box up and down through the extension and retraction of the output rod of the telescopic push rod, thereby scraping off the scale on the outer wall of the curved heat exchange tube. The scraped scale will remain in the filter box under the obstruction of the filter box. After the scraping is completed, the output rod of the telescopic push rod is started to retract to move the filter box and the scraper ring upward, and then the mounting plate is removed to take the fixed plate and the filter recovery mechanism out of the preheating recovery box, which is convenient for cleaning the scale inside the filter recovery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the waste heat recovery device for blast furnace slag flushing water of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the cleaning recovery mechanism and the curved heat exchange tube in the waste heat recovery device for blast furnace slag flushing water of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the cleaning component and the curved heat exchange tube in the cleaning and recovery mechanism of the utility model;

[0021] Figure 4 It is a top view of the waste heat recovery device for blast furnace slag flushing water according to the utility model.

[0022] Explanation of the reference numerals: 100, waste heat recovery box; 200, mounting groove; 300, fixing plate; 400, curved heat exchange tube; 500, cleaning and recovery mechanism; 510, cleaning assembly; 511, scraper ring; 512, fixing sleeve; 520, recovery assembly; 521, filter box; 522, filter hole; 523, through hole; 530, telescopic push rod; 600, mounting plate; 700, sealing gasket. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the following will be combined with the appended drawings of the embodiment of the utility model. Figure 1-4 , the technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0024] like Figure 1-4 As shown: This embodiment provides a waste heat recovery device for blast furnace slag flushing water, including a waste heat recovery box 100 for recovering heat in filtered blast furnace slag flushing water, a mounting groove 200 is provided on the top of the waste heat recovery box 100, a fixing plate 300 is provided in the mounting groove 200, a curved heat exchange tube 400 is inserted on the fixing plate 300, and a height-adjustable cleaning and recovery mechanism 500 is provided on the curved heat exchange tube 400 for scraping and collecting scale on the outer wall of the curved heat exchange tube 400, and the cleaning and recovery mechanism 500 includes a The cleaning component 510 on the outer wall and the recovery component 520 which is sleeved on the outer wall of the curved heat exchange tube 400 and located below the cleaning component 510 and is used to recover the scale scraped off by the cleaning component 510. The utility model can scrape off the scale above the outer wall of the curved heat exchange tube 400 through the cleaning component 510 in the height-adjustable cleaning and recovery mechanism 500, and recover the scraped scale through the recovery component 520, thereby avoiding a large amount of scale directly falling and remaining in the preheating recovery box, thereby ensuring the subsequent heat exchange efficiency of the curved heat exchange tube 400.

[0025] According to one embodiment of the utility model, Figure 1-4As shown, the cleaning assembly 510 includes a scraper ring 511 slidably disposed on the outside of the vertical portion of the curved heat exchange tube 400, and a fixing sleeve 512 is disposed on the outside of the scraper ring 511. The scraper ring 511 should be made of a hard high-temperature resistant rubber material with a certain taper, so that the scale can be easily scraped off and the outer wall of the curved heat exchange tube 400 can be avoided from being scratched, which is safer and more convenient. The fixing sleeve 512 is used to fix and limit the scraper ring 511.

[0026] According to another embodiment of the present invention, Figure 1 and Figure 2 As shown, the recovery component 520 includes a filter box 521 slidably set on the curved heat exchange tube 400, the fixed sleeve 512 is located at the bottom of the filter box 521, and a plurality of filter holes 522 are provided on the outer wall of the filter box 521. The upper outer wall and the lower outer wall of the filter box 521 are both provided with through holes 523 for the outer wall of the serpentine heat exchange tube to pass through. The utility model can ensure the smooth passage of water through the filter holes 522 on the filter box 521 while preventing the scraped scale from escaping and being mixed into the waste heat recovery box 100 under the impact of the water flow, which is safer, more convenient and convenient for subsequent cleaning of the scale.

[0027] According to another embodiment of the present invention, Figure 1 and Figure 4 As shown, a telescopic push rod 530 is provided on the upper part of the filter box 521. The telescopic push rod 530 is any one of a hydraulic telescopic rod, a pneumatic telescopic rod or an electric telescopic rod. The output rod end of the telescopic push rod 530 is fixedly arranged together with the upper part of the filter box 521. The fixed end of the telescopic push rod 530 is arranged on the outer wall of the fixing plate 300. The outer wall of the fixing plate 300 is provided with a mounting plate 600. The mounting plate 600 is fixedly arranged on the upper outer wall of the waste heat recovery box 100 by bolts. Under the action of, the filter box 521 and the scraper ring 511 inside the filter box 521 move up and down, thereby scraping off the scale on the outer wall of the curved heat exchange tube 400, and the scraped scale will remain in the filter box 521 under the obstruction of the filter box 521. After the scraping is completed, the output rod of the telescopic push rod 530 is started to retract to move the filter box 521 and the scraper ring 511 upward, and then the mounting plate 600 is removed to take the fixed plate 300 and the filter recovery mechanism out of the preheating recovery box, so as to facilitate the cleaning of the scale inside the filter recovery box.

[0028] According to another embodiment of the present invention, Figure 1 and Figure 3As shown, a sealing gasket 700 is provided on the outer wall of the vertical portion of the fixed plate 300. The sealing gasket 700 is made of a non-slip, wear-resistant and high-temperature resistant rubber material. The sealing gasket 700 can increase the sealing performance between the fixed plate 300 and the waste heat recovery box 100 to avoid unnecessary heat dissipation.

[0029] A water inlet is provided at the top of the waste heat recovery box 100, and a drain outlet is provided at the bottom of the waste heat recovery box 100. The utility model can introduce high-temperature water into the waste heat recovery box 100 through the water inlet, so that it can preheat the cold water inside the curved heat exchange tube 400, and guide the water with lowered temperature to other processes through the drain outlet, which is more convenient to operate.

[0030] The use of the utility model:

[0031] First of all, it should be made clear that the waste heat recovery device involved in the utility model is mainly used for recovering the preheat in the high-temperature water cooling process, and is widely used in iron smelting, casting, distillation and other fields. It should be made clear here that since the technical problem to be solved by the utility model is to improve the cleaning method of the scale remaining on the outer wall of the curved heat exchange tube 400, the working principle of the waste heat recovery device will not be described in detail. The specific working principle can refer to the Chinese utility model patent with the authorization announcement number: CN219284017U, which discloses a working process of a waste heat recovery device for slag water of an iron smelting blast furnace. The utility model takes the scraping and cleaning of the scale on the surface of the curved heat exchange tube 400 in the process of waste heat recovery of blast furnace slag water as an example to elaborate on its use method in detail. When the waste heat recovery device has been working for a period of time and it is necessary to clean the scale on the outer wall of the curved heat exchange tube 400, the extension and retraction of the output rod of the telescopic push rod 530 is started, and the extension and retraction of the output rod of the telescopic push rod 530 are activated. The filter box 521 and the scraper ring 511 inside the filter box 521 are moved up and down by the extension and retraction of the output rod of the retractable push rod 530, thereby scraping off the scale on the outer wall of the curved heat exchange tube 400. The scraped scale will remain in the filter box 521 under the obstruction of the filter box 521. After the scraping is completed, the output rod of the telescopic push rod 530 is started to retract to move upward with the filter box 521 and the scraper ring 511, and then the mounting plate 600 is removed to realize the removal of the fixing plate 300 and the filter recovery mechanism into the preheating recovery box, which is convenient for cleaning the scale inside the filter recovery box. The utility model can use the cleaning component 510 in the height-adjustable cleaning and recovery mechanism 500 to scrape off the scale on the outer wall of the curved heat exchange tube 400, and use the recovery component 520 to recover the scraped scale, so as to avoid a large amount of scale falling directly and remaining in the preheating recovery box, thereby ensuring the subsequent heat exchange efficiency of the curved heat exchange tube 400.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A waste heat recovery device for blast furnace slag flushing water, comprising a waste heat recovery box (100) for recovering heat from filtered blast furnace slag flushing water, characterized in that: The waste heat recovery box (100) is provided with an installation groove (200) at the top, a fixing plate (300) is arranged in the installation groove (200), a curved heat exchange tube (400) is inserted on the fixing plate (300), and a height-adjustable cleaning and recovery mechanism (500) is provided on the curved heat exchange tube (400) for scraping and collecting scale on the outer wall of the curved heat exchange tube (400), and the cleaning and recovery mechanism (500) comprises a cleaning component (510) arranged on the outer wall of the curved heat exchange tube (400) and a recovery component (520) sleeved on the outer wall of the curved heat exchange tube (400) and located below the cleaning component (510) for recovering scale scraped off by the cleaning component (510).

2. The waste heat recovery device for blast furnace slag flushing water according to claim 1, characterized in that: The cleaning assembly (510) comprises a scraper ring (511) slidably arranged on the outside of the vertical portion of the curved heat exchange tube (400), and a fixing sleeve (512) is arranged on the outside of the scraper ring (511).

3. The waste heat recovery device for blast furnace slag flushing water according to claim 2, characterized in that: The recovery component (520) comprises a filter box (521) slidably arranged on the curved heat exchange tube (400), the fixed sleeve (512) is located at the bottom of the filter box (521), a plurality of filter holes (522) are provided on the outer wall of the filter box (521), and through holes (523) for the outer wall of the serpentine heat exchange tube to pass through are provided on the upper outer wall and the lower outer wall of the filter box (521).

4. The waste heat recovery device for blast furnace slag flushing water according to claim 3, characterized in that: A telescopic push rod (530) is provided on the upper part of the filter box (521), the output rod end of the telescopic push rod (530) is fixed to the upper part of the filter box (521), and the fixed end of the telescopic push rod (530) is arranged on the outer side wall of the fixed plate (300).

5. The waste heat recovery device for blast furnace slag flushing water according to claim 4, characterized in that: A mounting plate (600) is provided on the outer side wall of the fixing plate (300), and the mounting plate (600) is fixed to the upper outer side wall of the waste heat recovery box (100) by means of bolts.

6. The waste heat recovery device for blast furnace slag flushing water according to claim 5, characterized in that: A sealing gasket (700) is provided on the outer side wall of the vertical portion of the fixing plate (300).

7. The waste heat recovery device for blast furnace slag flushing water according to claim 6, characterized in that: The upper portion of the waste heat recovery box (100) is provided with a water inlet, and the bottom portion of the waste heat recovery box (100) is provided with a drain outlet.

Images