An en masse scraper conveyor for conveying slag in a thermal power plant

Abstract

The utility model relates to the technical field of slag conveying, especially relates to a hot blast furnace slag conveying is with burying scraper and is conveyed, including the conveying groove for receiving the slag, the inside of conveying groove is provided with the conveying chain, be provided with a plurality of scrapers on the conveying chain, the scraper on the lower surface of conveying chain along the bottom surface of conveying groove and slide, the bottom of conveying groove is provided with the water tank, the water tank is connected with the cold water machine, the angle department of the bottom surface and side of conveying groove is provided with the auxiliary board, the auxiliary board and the bottom surface and side of conveying groove constitute cooling cavity, the cooling cavity is connected with the water tank, the bottom of conveying groove is provided with the pipeline, the pipeline is used for connecting cooling cavity and cold water machine, not only has improved the stability of conveying process, also is helpful to prolong the service life of whole slag conveyor.

Description

Technical Field

[0001] This utility model relates to the field of slag conveying technology, and in particular to a buried scraper slag conveyor for conveying slag in thermal power plants. Background Technology

[0002] Furnace slag is a common industrial waste in industrial production activities. Different types of slag have different chemical compositions, requiring different methods of secondary utilization. Large thermal power plants generate a large amount of slag daily, necessitating a dedicated slag conveying system for its transport and centralized processing. Typically, slag is very hot when it exits the furnace, making conveying difficult and requiring it to cool before transport. Natural cooling takes a long time, causing delays in the timely transport of slag fresh from the furnace. Therefore, a buffer zone needs to be installed outside the furnace.

[0003] In existing technology, a scraper conveyor is used to transport slag. The specific structure involves a metal conveyor trough receiving the slag, with a chain conveyor belt installed inside. Scrapers on the chain conveyor belt push the slag to a designated location. During transport, the slag cools down, and the scrapers clean the bottom of the conveyor trough, achieving cooling and collection. However, due to the high temperature of the slag, it doesn't cool down quickly enough upon entering the conveyor trough, resulting in some molten slag. At the receiving point of the conveyor trough, some hot slag accumulates at the angle between the side wall and the bottom. Because of the gap between the scraper and the side wall, the scraper cannot promptly clean the molten slag from the gap, leaving solidified slag residue. This residual slag accelerates scraper wear, reduces scraper lifespan, and necessitates timely cleaning of the slag in the gap, increasing work steps and reducing efficiency. Therefore, this technical solution is proposed for improvement. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing buried scraper slag conveyors, which leave some residue when conveying slag, thus reducing production efficiency, and to provide a buried scraper slag conveyor for conveying slag in thermal power plants.

[0005] This utility model is achieved through the following technical solution: a buried scraper slag conveyor for conveying slag in a thermal power plant, comprising a conveying trough for receiving slag, a conveying chain is provided inside the conveying trough, a plurality of scrapers are provided on the conveying chain, and the scrapers on the lower surface of the conveying chain slide along the bottom surface of the conveying trough. A water tank is installed at the bottom of the conveying trough, and the water tank is connected to a chiller; An auxiliary plate is provided at the angle between the bottom and side of the conveying trough, and the auxiliary plate, together with the bottom and side of the conveying trough, forms a cooling cavity. The cooling chamber is connected to the water tank, and a pipe is provided at the bottom of the conveying trough for connecting the cooling chamber and the chiller.

[0006] Furthermore, the water tank is located below the material receiving point of the conveying trough, and the bottom of the water tank is provided with a flange for connecting to the chiller.

[0007] Furthermore, the auxiliary plate is arranged along the length of the conveying groove, and the cross-section of the cooling cavity is a right-angled trapezoidal structure.

[0008] Furthermore, the interior of the conveying trough is provided with at least two rotating shafts, and a connecting wheel for connecting the conveying chain is provided at the middle position of the rotating shafts.

[0009] Furthermore, the scraper is detachably connected to the conveyor chain, and the scraper is laterally arranged between the auxiliary plates on both sides.

[0010] Furthermore, cleaning plates are provided at both ends of the scraper, and the cleaning plates are arranged perpendicularly along the outer surface of the auxiliary plate.

[0011] Furthermore, a drive motor is provided on the side of the conveying trough, and the drive motor is connected to the rotating shaft through a reduction mechanism.

[0012] The beneficial effects of this utility model are as follows: 1. A complete circulating cooling system is formed by the water tank, cooling chamber and external chiller set at the bottom of the conveying trough. This system can quickly and effectively cool the high-temperature slag that has just fallen into the conveying trough, so that it can solidify rapidly. This greatly reduces the residual time of the molten slag, thereby avoiding the blockage problem caused by the molten slag sticking to the inner wall of the equipment and the scraper, and ensuring the continuity of the conveying.

[0013] 2. The scraper is responsible for pushing the slag and cleaning the bottom of the tank, while the cleaning plates set at intervals at both ends of the scraper are specifically used to scrape off the solidified slag on the surface of the auxiliary plate. This provides the necessary solidification time for the slag and can promptly and thoroughly remove slag residue from various parts, effectively preventing slag accumulation, ensuring the smooth flow of the conveying channel, and thus improving the overall slag conveying efficiency and the self-cleaning ability of the equipment.

[0014] 3. The scraper and conveyor chain adopt a detachable connection method. When a scraper is worn or damaged, it can be easily replaced individually without disassembling the entire conveyor chain system. This modular design significantly simplifies the maintenance and repair process, shortens downtime, and reduces long-term spare parts costs and maintenance workload.

[0015] 4. The conveyor chain uses a chain, and the connecting wheel uses a ratchet. This combination can effectively prevent slippage during the slag pushing process, ensuring the reliability of power transmission. At the same time, the drive motor drives the rotating shaft through the reduction mechanism, so that the conveyor chain and scraper can run at a stable and appropriate speed. The smooth operation reduces the impact and wear on the equipment, which not only improves the stability of the conveying process, but also helps to extend the service life of the entire slag conveyor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle; Figure 3 This is a side view structural diagram of the present invention; Figure 4 This is a cross-sectional view of the water tank of this utility model; Figure 5 This is a schematic cross-sectional view of the internal structure of the conveying trough of this utility model; The components are: 1. Conveying trough; 101. Auxiliary plate; 102. Cooling chamber; 2. Water tank; 201. Flange; 3. Conveying chain; 301. Scraper; 302. Cleaning plate; 4. Drive motor; 401. Reduction mechanism; 5. Rotating shaft; 501. Connecting wheel. Detailed Implementation

[0017] In the description of this utility model, 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 utility model based on the specific circumstances.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Example

[0019] like Figures 1 to 5As shown: This utility model proposes a slag conveyor 301 with buried scraper for conveying slag in thermal power plants, which mainly includes a conveying trough 1 for receiving slag, a conveying chain 3, multiple scrapers 301 set on the conveying chain 3, a water tank 2, a chiller, an auxiliary plate 101, pipes, a rotating shaft 5, a connecting wheel 501, a drive motor 4, and a reduction mechanism 401.

[0020] A conveying trough 1 is located at the slag outlet to receive the discharged slag. A conveying chain 3 is installed along its length inside the conveying trough 1, and multiple scrapers 301 are evenly distributed on the conveying chain 3. At least two rotating shafts 5 are installed inside the conveying trough 1. A connecting wheel 501 is located in the middle of the rotating shaft 5 to connect to the conveying chain 3. The rotating shaft 5 and the connecting wheel 501 work together to achieve the cyclical operation of the conveying chain 3. A drive motor 4 is located on the side of the conveying trough 1. The drive motor 4 is connected to the rotating shaft 5 through a reduction mechanism 401, which is a speed reducer. The drive motor 4 provides power for the operation of the entire conveying chain 3. After being reduced in speed by the reduction mechanism 401, the rotating shaft 5 drives the conveying chain 3 and scrapers 301 at a suitable speed to operate stably, ensuring that the slag can be conveyed smoothly and efficiently.

[0021] In this embodiment, the connecting wheel 501 is a ratchet, and the conveying chain 3 is a chain to prevent slippage during the slag pushing process and improve the slag conveying effect. The scraper 301 on the lower surface of the conveying chain 3 slides along the bottom surface of the conveying trough 1. During the conveying process, the scraper 301 pushes the slag to the designated position on the one hand, and cleans the bottom of the conveying trough 1 on the other hand.

[0022] To accelerate the cooling of the newly received slag, a water tank 2 is installed at the bottom of the conveying trough 1. The water tank 2 is located below the receiving point of the conveying trough 1, and a flange 201 for connecting to a chiller is installed at the bottom of the water tank 2 for easy connection. The chiller is connected to the water tank 2 and can cool the water inside. Simultaneously, an auxiliary plate 101 is installed at the angle between the bottom and side surfaces of the conveying trough 1. The auxiliary plate 101 is positioned along the length of the conveying trough 1, and together with the bottom and side surfaces of the conveying trough 1, it forms a cooling chamber 102. The cooling chamber 102 has a right-angled trapezoidal cross-section. The cooling chamber 102 is connected to the water tank 2 via a pipe, and a pipe is also installed at the bottom of the conveying trough 1 to connect the cooling chamber 102 and the chiller, forming a complete cooling circulation system. When the high-temperature slag falls into the conveying trough 1, the cold water in the chiller enters the water tank 2 and the cooling chamber 102 through the pipes to cool the material receiving point of the conveying trough 1 and the angle between the side wall and the bottom of the conveying trough 1, so that the slag is cooled down quickly and the generation of molten slag is reduced.

[0023] The scraper 301 and the conveyor chain 3 are detachably connected, which facilitates the replacement and maintenance of the scraper 301. The scraper 301 is horizontally arranged between the auxiliary plates 101 on both sides, so that multiple scrapers 301 can push and discharge the slag inside the conveying trough 1. The auxiliary plates 101 on both sides can gather the slag towards the middle position, thereby accelerating the conveying of slag.

[0024] Cleaning plates 302 are provided at both ends of some scraper blades 301. Specifically, there are two scraper blades 301 spaced apart between the scraper blades 301 with cleaning plates 302 at both ends, and the cleaning plates 302 are set vertically along the outer surface of the auxiliary plate 101. During use, if molten slag falls onto the surface of the auxiliary plate 101, the cold water inside the cooling chamber 102 can quickly cool it down, causing the slag to solidify rapidly, making it easier for the scraper blades 301 and cleaning plates 302 to clean it quickly. The spaced cleaning plates 302 provide solidification time for the slag on the surface of the auxiliary plate 101, making it easier to clean after solidification. Using the cooling chamber 102 accelerates the solidification of molten slag, greatly reducing the amount of molten slag entering between the scraper blades 301 and the conveying trough 1. The solidified slag is easily cleaned by the scraper blades 301 and cleaning plates 302, preventing slag residue and improving conveying efficiency.

[0025] In practical applications, slag from thermal power plants is discharged directly into conveying trough 1 after exiting the furnace. At this time, the chilled water in water tank 2 is kept at a low temperature by a chiller. The chilled water enters cooling chamber 102 through pipes to rapidly cool the high-temperature slag in conveying trough 1. The conveyor chain 3 starts operating under the drive of motor 4, and scraper 301 moves with the conveyor chain 3, pushing the cooled slag to a designated position. During this movement, scraper 301 cleans the bottom of conveying trough 1, while cleaning plates 302 at both ends of scraper 301 clean the outer surface of auxiliary plate 101 to prevent slag residue. After cooling and cleaning, the slag is successfully conveyed out. The entire process is efficient and stable, effectively solving the problems of traditional buried scraper slag conveyors, improving work efficiency, extending equipment lifespan, and reducing maintenance costs.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A submerged scraper conveyor for conveying slag in a thermal power plant, comprising a conveying trough for receiving slag, characterized in that, The conveying trough is equipped with a conveying chain, and the conveying chain is equipped with multiple scrapers. The scrapers on the lower surface of the conveying chain slide along the bottom surface of the conveying trough. A water tank is installed at the bottom of the conveying trough, and the water tank is connected to a chiller; An auxiliary plate is provided at the angle between the bottom and side of the conveying trough, and the auxiliary plate, together with the bottom and side of the conveying trough, forms a cooling cavity. The cooling chamber is connected to the water tank, and a pipe is provided at the bottom of the conveying trough for connecting the cooling chamber and the chiller.

2. The buried scraper conveyor for conveying slag in thermal power plants according to claim 1, characterized in that, The water tank is located below the material receiving point of the conveying trough, and the bottom of the water tank is provided with a flange for connecting to the chiller.

3. The buried scraper conveyor for conveying slag in thermal power plants according to claim 1, characterized in that, The auxiliary plate is arranged along the length of the conveying trough, and the cross-section of the cooling cavity is a right-angled trapezoidal structure.

4. The buried scraper conveyor for conveying slag in thermal power plants according to claim 3, characterized in that, The conveying trough has at least two rotating shafts inside, and a connecting wheel for connecting the conveying chain is provided at the middle position of the rotating shaft.

5. The buried scraper conveyor for conveying slag in thermal power plants according to claim 4, characterized in that, The scraper is detachably connected to the conveyor chain, and the scraper is laterally arranged between the auxiliary plates on both sides.

6. The buried scraper conveyor for conveying slag in thermal power plants according to claim 5, characterized in that, The scraper is provided with cleaning plates at both ends, and the cleaning plates are arranged perpendicularly along the outer surface of the auxiliary plate.

7. The buried scraper conveyor for conveying slag in thermal power plants according to claim 4, characterized in that, A drive motor is provided on the side of the conveying trough, and the drive motor is connected to the rotating shaft through a reduction mechanism.

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