Smelting slag treatment waste heat recovery device

Abstract

The utility model discloses a smelting slag disposal waste heat recovery device, which relates to the technical field of waste heat recovery and comprises a material conveying mechanism, a radiation cooling mechanism arranged at the top of the material conveying mechanism, a circulating cooling mechanism arranged on the inner side of the material conveying mechanism and a waste heat boiler body connected to the circulating cooling mechanism. The conveying mechanism comprises a plurality of cast iron chains and a high-temperature-resistant feeding belt formed by assembling a plurality of cast iron chain fire grates. Through the arrangement of the high-temperature radiation cooling chamber, the secondary high-temperature radiation cooling chamber, the medium-temperature radiation cooling chamber and the low-temperature radiation cooling chamber, heat of red slag is radiated to the water-cooled wall and cooled through circulating water in a water-cooled wall tube, and meanwhile, a water circulation system is carried out in cooperation with an external existing boiler; and an evaporation system of the boiler is formed with the existing boiler barrel during the period, so that the generated steam is used for production and life or power generation, and resource waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for smelting slag disposal. Background Art

[0002] Slag is the product remaining after smelting in a smelting furnace. The temperature of the slag when discharged from the metallurgical furnace can reach 1000 - 1600 °C, which contains a large amount of thermal energy.

[0003] Currently, in the prior art for the treatment of high-temperature slag, most methods are to stack the high-temperature slag centrally and then cool it with water, and then discharge the high-temperature flue gas through a smoke exhaust channel. Such a cooling method not only wastes the heat in the high-temperature slag but also generates a large amount of smelting wastewater, causing environmental pollution and resource waste. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat recovery device for smelting slag disposal to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A waste heat recovery device for smelting slag disposal includes a conveying and feeding mechanism, a radiation cooling mechanism arranged on the top of the conveying and feeding mechanism, a circulating cooling mechanism arranged inside the conveying and feeding mechanism, and a waste heat boiler body connected to the circulating cooling mechanism;

[0007] The conveying and feeding mechanism includes a number of cast iron chains and a high-temperature resistant feeding belt assembled by a number of cast iron chain grates;

[0008] The radiation cooling mechanism includes a high-temperature radiation cooling chamber, a sub-high-temperature radiation cooling chamber, a medium-temperature radiation cooling chamber, and a low-temperature radiation cooling chamber arranged in sequence on the high-temperature resistant feeding belt;

[0009] The waste heat boiler body includes a waste heat boiler and a high-temperature channel and a medium-temperature channel connected to the waste heat boiler;

[0010] The circulating cooling mechanism includes a low-temperature cooling circulating fan and a medium-temperature cooling circulating fan. The output end of the low-temperature cooling circulating fan is connected to a first air duct, the first air duct is arranged inside the high-temperature resistant feeding belt and connected to the high-temperature channel, and the input end of the low-temperature cooling circulating fan is connected to a first return pipe, and the other end of the first return pipe communicates with the high-temperature channel. The output end of the medium-temperature cooling circulating fan is connected to a second air duct, the second air duct is arranged inside the high-temperature resistant feeding belt and connected to the medium-temperature channel, and the input end of the medium-temperature cooling circulating fan is connected to a second return pipe, and the other end of the second return pipe communicates with the medium-temperature channel.

[0011] Preferably, the first air duct and the second air duct are respectively U-shaped inside the high-temperature resistant conveyor belt, and air holes are provided on the high-temperature resistant conveyor belt. The first air duct and the second air duct respectively extract flue gas through the air holes. The circulating air through the air holes can forcibly convectively cool the hot slag in sequence.

[0012] Preferably, the first air duct is connected in series inside the high-temperature resistant conveyor belt and is distributed corresponding to the bottoms of the high-temperature radiation cooling chamber and the low-temperature radiation cooling chamber. The circulating air can blow vertically upward from the bottom in the areas of the high-temperature radiation cooling chamber and the low-temperature radiation cooling chamber to take out the heat of the slag.

[0013] Preferably, the second air duct is connected in series inside the high-temperature resistant conveyor belt and is distributed corresponding to the bottoms of the sub-high-temperature radiation cooling chamber and the medium-temperature radiation cooling chamber. The circulating air can blow vertically upward from the bottom in the areas of the sub-high-temperature radiation cooling chamber and the medium-temperature radiation cooling chamber to take out the heat of the slag.

[0014] Preferably, the high-temperature radiation cooling chamber, the sub-high-temperature radiation cooling chamber, the medium-temperature radiation cooling chamber and the low-temperature radiation cooling chamber are arranged in sequence from right to left according to the feed bin of the high-temperature resistant conveyor belt. This promotes the step-by-step cooling of the slag.

[0015] Preferably, water-cooled walls are respectively arranged inside the high-temperature radiation cooling chamber, the sub-high-temperature radiation cooling chamber, the medium-temperature radiation cooling chamber and the low-temperature radiation cooling chamber. The water-cooled walls are cooled by the circulating water in the water-cooled wall pipes.

[0016] Preferably, flue gas outlets are respectively arranged on the surfaces of the high-temperature channel and the medium-temperature channel. The first return pipe is connected to the flue gas outlet of the high-temperature channel, and the second return pipe is connected to the flue gas outlet of the medium-temperature channel. After the waste heat boiler cools down the hot flue gas, it is recycled into the fan and circulated into the high-temperature resistant conveyor belt for heat exchange work.

[0017] Preferably, the waste heat boiler body further includes a plurality of evaporators respectively arranged inside the high-temperature channel and the medium-temperature channel, and the evaporators are longitudinally arranged. After the flue gas passes through the evaporators, it can carry out circulating heat exchange work.

[0018] Due to the adoption of the above technical solutions, the technical progress achieved by the present utility model compared with the prior art is:

[0019] 1. The utility model provides a waste heat recovery device for smelting slag disposal, aiming to solve the problems of environmental pollution and resource waste in the existing cooling methods. Through the arrangement of a high-temperature radiation cooling chamber, a sub-high-temperature radiation cooling chamber, a medium-temperature radiation cooling chamber, and a low-temperature radiation cooling chamber, the heat of the red slag is radiated to the water-cooled wall and cooled by the circulating water in the water-cooled wall tube. At the same time, in cooperation with the existing external boiler for the water circulation system, and during this period, it forms an evaporation system of the boiler with the existing boiler drum, promoting the generated steam to be used for production and living or power generation, reducing resource waste.

[0020] 2. The utility model provides a waste heat recovery device for smelting slag disposal, aiming to solve the problem of enhancing heat transfer. By starting the low-temperature cooling circulation fan and the medium-temperature cooling circulation fan, the first air duct and the second air duct can cooperate with the air holes to extract the circulating air for the hot slag flue gas, and after extraction, it enters the high-temperature channel and the medium-temperature channel of the waste heat boiler body. After the waste heat boiler cools down the hot flue gas, the cold air is recycled into the circulation fan through the first return pipe and the second return pipe, completing the heat exchange work of the slag on the high-temperature resistant conveyor belt. In this way, the cooperation between the radiation cooling mechanism and the circulation cooling mechanism can promote heat transfer enhancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the conveying and feeding mechanism of the present utility model;

[0022] Figure 2 It is a schematic diagram of the circulation cooling mechanism of the present utility model;

[0023] Figure 3 It is a schematic diagram of the waste heat boiler body of the present utility model.

[0024] In the figure: 1. Conveying and feeding mechanism; 11. Cast iron chain; 12. High-temperature resistant conveyor belt;

[0025] 2. Radiation cooling mechanism; 21. High-temperature radiation cooling chamber; 22. Sub-high-temperature radiation cooling chamber; 23. Medium-temperature radiation cooling chamber; 24. Low-temperature radiation cooling chamber;

[0026] 3. Circulation cooling mechanism; 31. Low-temperature cooling circulation fan; 32. Medium-temperature cooling circulation fan; 33. First air duct; 34. First return pipe; 35. Second air duct; 36. Second return pipe;

[0027] 4. Waste heat boiler body; 41. Waste heat boiler; 42. High-temperature channel; 43. Medium-temperature channel; 44. Evaporator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further describes the present utility model in detail with reference to the embodiments:

[0029] Such as Figures 1-3As shown in the figure, the utility model provides a waste heat recovery device for smelting slag disposal, which includes a conveying and feeding mechanism 1, a radiation cooling mechanism 2 arranged on the top of the conveying and feeding mechanism 1, a circulating cooling mechanism 3 arranged inside the conveying and feeding mechanism 1, and a waste heat boiler body 4 connected to the circulating cooling mechanism 3;

[0030] The conveying and feeding mechanism 1 includes a number of cast iron chains 11 and a high-temperature resistant feeding belt 12 assembled by the grates of a number of cast iron chains 11;

[0031] The radiation cooling mechanism 2 includes a high-temperature radiation cooling chamber 21, a sub-high-temperature radiation cooling chamber 22, a medium-temperature radiation cooling chamber 23, and a low-temperature radiation cooling chamber 24 arranged in sequence on the high-temperature resistant feeding belt 12;

[0032] The waste heat boiler body 4 includes a waste heat boiler 41, and a high-temperature channel 42 and a medium-temperature channel 43 connected to the waste heat boiler 41;

[0033] The circulating cooling mechanism 3 includes a low-temperature cooling circulating fan 31 and a medium-temperature cooling circulating fan 32. The output end of the low-temperature cooling circulating fan 31 is connected with a first air duct 33. The first air duct 33 is arranged inside the high-temperature resistant feeding belt 12 and connected to the high-temperature channel 42. And the input end of the low-temperature cooling circulating fan 31 is connected with a first return pipe 34. The other end of the first return pipe 34 communicates with the high-temperature channel 42. The output end of the medium-temperature cooling circulating fan 32 is connected with a second air duct 35. The second air duct 35 is arranged inside the high-temperature resistant feeding belt 12 and connected to the medium-temperature channel 43. And the input end of the medium-temperature cooling circulating fan 32 is connected with a second return pipe 36. The other end of the second return pipe 36 communicates with the medium-temperature channel 43.

[0034] Furthermore, the conveying and feeding mechanism 1 also includes a sprocket and a roller shaft for driving the high-temperature resistant feeding belt 12, and the cooperation of this structure is a conventional technology in the art, so it will not be elaborated in detail in this article.

[0035] As Figure 1 shown, the first air duct 33 and the second air duct 35 are arranged inside the high-temperature resistant feeding belt 12 in a U shape respectively. And there are air holes on the high-temperature resistant feeding belt 12. The first air duct 33 and the second air duct 35 respectively extract flue gas through the air holes. The first air duct 33 is connected in series inside the high-temperature resistant feeding belt 12 and is distributed corresponding to the bottoms of the high-temperature radiation cooling chamber 21 and the low-temperature radiation cooling chamber 24. The second air duct 35 is connected in series inside the high-temperature resistant feeding belt 12 and is distributed corresponding to the bottoms of the sub-high-temperature radiation cooling chamber 22 and the medium-temperature radiation cooling chamber 23.

[0036] Further, the first air duct 33 and the second air duct 35 are limited to be U-shaped and arranged inside the high-temperature resistant feeding belt 12. The connection between them is communicated through a sealed duct. After the fan is started, the circulating air can transport and cool the hot slag through the air holes in sequence, so as to complete the heat exchange work.

[0037] As Figure 1 shown, the high-temperature radiation cooling chamber 21, the sub-high-temperature radiation cooling chamber 22, the medium-temperature radiation cooling chamber 23, and the low-temperature radiation cooling chamber 24 are arranged in sequence from right to left according to the feeding bin of the high-temperature resistant feeding belt 12. Water-cooled walls are respectively arranged in the high-temperature radiation cooling chamber 21, the sub-high-temperature radiation cooling chamber 22, the medium-temperature radiation cooling chamber 23, and the low-temperature radiation cooling chamber 24. The water-cooled walls are cooled by the circulating water in the water-cooled wall pipes, and the water-cooled walls cooperate with the existing boilers outside to form a water circulation system, and during this period, an evaporation system of the boiler is formed with the existing boiler drum.

[0038] As Figure 3 shown, smoke outlets are respectively arranged on the surfaces of the high-temperature channel 42 and the medium-temperature channel 43. The first return pipe 34 is connected to the smoke outlet of the high-temperature channel 42, and the second return pipe 36 is connected to the smoke outlet of the medium-temperature channel 43. The waste heat boiler body 4 further includes a plurality of evaporators 44 respectively arranged in the high-temperature channel 42 and the medium-temperature channel 43, and the evaporators 44 are longitudinally arranged.

[0039] Further, the waste heat boiler 41 cools the hot flue gas and then recirculates it into the fan, and the fan circulates and blows it into the inner side of the high-temperature resistant feeding belt 12 for heat exchange work.

[0040] Next, the working principle of the high-solid waste brine filtration device will be specifically described.

[0041] As Figures 1-3 shown, the fiery red slag drops through the feeding bin at one end of the high-temperature resistant feeding belt 12 and is conveyed backward. During this process, through the arrangement of the high-temperature radiation cooling chamber 21, the sub-high-temperature radiation cooling chamber 22, the medium-temperature radiation cooling chamber 23, and the low-temperature radiation cooling chamber 24, the heat of the red slag is radiated to the water-cooled wall and cooled by the circulating water in the water-cooled wall pipes. At the same time, in cooperation with the existing boilers outside to form a water circulation system, and during this period, an evaporation system of the boiler is formed with the existing boiler drum, so as to generate steam for production, living or power generation. At the same time, when the low-temperature cooling circulating fan 31 and the medium-temperature cooling circulating fan 32 are started, the first air duct 33 and the second air duct 35 can cooperate with the air holes to extract the circulating air for the hot slag flue gas, and after extraction, it enters the high-temperature channel 42 and the medium-temperature channel 43 of the waste heat boiler body 4. After the waste heat boiler 41 cools the hot flue gas, the cold air recirculates into the circulating fan through the first return pipe 34 and the second return pipe 36, completing the heat exchange work of the slag on the high-temperature resistant feeding belt 12. In this way, the cooperation of the two cooling mechanisms can strengthen the heat exchange.

[0042] It should be noted that in the description of the present disclosure, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0043] The above has generally described the present invention in detail, but based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, modifications or improvements made without departing from the spirit and idea of the present invention are within the protection scope of the present invention.

Claims

1. A waste heat recovery device for smelting slag disposal, characterized in that: It includes a conveying and transporting mechanism, a radiation cooling mechanism arranged on the top of the conveying and transporting mechanism, a circulating cooling mechanism arranged inside the conveying and transporting mechanism, and a waste heat boiler body connected to the circulating cooling mechanism; The conveying and transporting mechanism comprises a plurality of cast iron chains and a high temperature resistant feeding belt assembled from a plurality of cast iron chain grates; The radiation cooling mechanism comprises a high temperature radiation cooling chamber, a sub-high temperature radiation cooling chamber, a medium temperature radiation cooling chamber and a low temperature radiation cooling chamber which are sequentially arranged on the high temperature resistant feeding belt; The waste heat boiler body includes a waste heat boiler and a high-temperature channel and a medium-temperature channel connected to the waste heat boiler; The circulating cooling mechanism includes a low-temperature cooling circulating fan and a medium-temperature cooling circulating fan, the output end of the low-temperature cooling circulating fan is connected to a first air duct, the first air duct is arranged on the inner side of the high-temperature resistant feeding belt and connected to the high-temperature channel, and the input end of the low-temperature cooling circulating fan is connected to a first return pipe, the other end of the first return pipe is connected to the high-temperature channel, the output end of the medium-temperature cooling circulating fan is connected to a second air duct, the second air duct is arranged on the inner side of the high-temperature resistant feeding belt and connected to the medium-temperature channel, and the input end of the medium-temperature cooling circulating fan is connected to a second return pipe, the other end of the second return pipe is connected to the medium-temperature channel.

2. The waste heat recovery device for smelting slag treatment according to claim 1, characterized in that: The first air duct and the second air duct are arranged on the inner side of the high temperature resistant feeding belt and are respectively U-shaped, and the high temperature resistant feeding belt is provided with air holes, and the first air duct and the second air duct respectively extract smoke through the air holes.

3. The waste heat recovery device for smelting slag treatment according to claim 2, characterized in that: The first air duct is connected in series to the inner side of the high temperature resistant feeding belt and is distributed corresponding to the bottom of the high temperature radiation cooling chamber and the low temperature radiation cooling chamber.

4. The waste heat recovery device for smelting slag treatment according to claim 2, characterized in that: The second air duct is connected in series to the inner side of the high temperature resistant feeding belt and is distributed corresponding to the bottom of the sub-high temperature radiation cooling chamber and the medium temperature radiation cooling chamber.

5. The waste heat recovery device for smelting slag treatment according to claim 1, characterized in that: The high temperature radiation cooling chamber, the sub-high temperature radiation cooling chamber, the medium temperature radiation cooling chamber and the low temperature radiation cooling chamber are arranged from right to left according to the feeding bin of the high temperature resistant feeding belt.

6. The waste heat recovery device for smelting slag treatment according to claim 5, characterized in that: The high-temperature radiation cooling chamber, the sub-high-temperature radiation cooling chamber, the medium-temperature radiation cooling chamber and the low-temperature radiation cooling chamber are respectively provided with water-cooled walls.

7. The waste heat recovery device for smelting slag treatment according to claim 1, characterized in that: The surfaces of the high-temperature channel and the medium-temperature channel are respectively provided with smoke outlets, the first return pipe is connected to the smoke outlet of the high-temperature channel, and the second return pipe is connected to the smoke outlet of the medium-temperature channel.

8. The waste heat recovery device for smelting slag treatment according to claim 1, characterized in that: The waste heat boiler body also includes a plurality of evaporators respectively arranged in the high-temperature channel and the medium-temperature channel, and the evaporators are arranged longitudinally.

Images