A rotary kiln slag high-temperature dewatering device

Abstract

The utility model relates to a rotary kiln slag high temperature dewatering device. The rotary kiln slag high temperature dewatering device includes the cooling container, the slag conveyor, the transmission belt and the slag storage container that set up successively, is provided with the dehydration assembly on the transmission belt, and the dehydration assembly includes the annular steam pipeline that is used for forming the high temperature dewatering area and is around setting on the transmission belt, can further reduce the moisture content of the slag produced by rotary kiln through setting up the dehydration assembly, and the main energy consumption steam of the equipment operation is the steam produced by the waste heat boiler, and the steam consumption is not big, and the transportation loss is lower, and the existing resources are greatly used to reduce the incineration disposal cost, the high moisture content leads to the slag volume, the transportation cost is high, and the bacteria are easy to breed or release the harmful substance, increase landfill leachate treatment pressure, avoid the moisture content in the slag to cause the pollution to the environment when landfill.

Description

Technical Field

[0001] This utility model relates to the technical field of kiln slag dewatering devices, specifically a high-temperature dewatering device for rotary kiln slag. Background Technology

[0002] Hazardous waste incineration in rotary kilns produces a large amount of slag. The primary method for slag removal in rotary kilns is a wet-sealed scraper slag remover, employing an upper-chain drive. As the scraper chain enters the return section from the discharge port, it sags due to gravity, achieving slag removal. However, because the scraper slag remover has a continuous slag removal and conveying capacity of 1 t / h, the dehydration time during slag removal is short, resulting in a high slag moisture content, typically 20%-40%. High moisture content leads to large slag volume, high transportation costs, and increased susceptibility to bacterial growth and the release of harmful substances, increasing the pressure on landfill leachate treatment. Therefore, reducing the moisture content of the slag can reduce incineration operating costs.

[0003] There are many dewatering technologies for slag, such as centrifugal dewatering and filter press dewatering, but the above methods are all energy-intensive. Therefore, dewatering can be carried out by heat or temperature in combination with the characteristics of incineration itself. At the same time, it is necessary to avoid secondary combustion of waste. Using steam generated by incineration as a heat source is a good method, which can create a high-temperature environment and make it difficult for incompletely burned organic waste to be burned again. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a high-temperature dehydration device for rotary kiln slag. It achieves slag dehydration through the high-temperature thermal radiation generated by steam, which can stably reduce the excessive moisture content of the slag without affecting the efficiency of normal combustion.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature dewatering device for rotary kiln slag, comprising a cooling container, a slag remover, a transmission belt, and a slag collection container arranged in sequence, wherein a dewatering component is provided on the transmission belt, and the dewatering component includes an annular steam pipe arranged around the transmission belt for forming a high-temperature dewatering zone.

[0006] The cooling container contains a cooling medium. The slag remover includes an inclined section immersed in the medium for receiving and conveying the slag immersed in the medium for cooling, and a horizontal section that works in conjunction with the inclined section to convey the cooled slag. The transmission belt is located below the conveying end of the horizontal section of the slag remover to receive the cooled slag and to convey the slag to the slag collection container.

[0007] The annular steam pipe is wrapped around the outside of the transmission belt and has space left on the upper surface of the transmission belt to form a high-temperature dehydration zone.

[0008] Furthermore, the outer surface of the annular steam pipe is covered with a corrosion-resistant carbon steel plate, the carbon steel plate is covered with an insulation cotton layer, and the insulation cotton layer is covered with a protective steel plate.

[0009] Furthermore, the annular steam pipe is equipped with a steam inlet pipe for introducing high-temperature steam and a condensate outlet pipe for discharging condensate.

[0010] Furthermore, the steam treatment component includes an exhaust pump connected to a steam delivery pipe for absorbing the steam from high-temperature evaporation. The steam delivery pipe includes a flexible hose connected to the exhaust pump, and a bucket-shaped adsorption hood is provided at the end of the hose. The adsorption hood is located in the high-temperature dehydration area.

[0011] Furthermore, the horizontal section of the slag remover and the transmission belt are equipped with retention troughs, which are used to guide the slag conveyed by the horizontal section of the slag remover so that it falls into the high-temperature dehydration area on the transmission belt.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] 1. This rotary kiln slag high-temperature dewatering device, by being equipped with a dewatering component, can effectively achieve the effect of evaporating moisture from the water-cooled slag during use. This solves the problems of high moisture content leading to large slag volume, high transportation costs, and easy growth of bacteria or release of harmful substances, which increases the pressure on landfill leachate treatment.

[0014] 2. It enables further reduction of moisture in the slag produced by the rotary kiln. At the same time, the main energy consumption of the equipment is generated by its own waste heat boiler, and the amount of steam consumed is not large. The loss is low due to local transportation, which makes full use of existing resources to reduce the cost of incineration and disposal, and avoids environmental pollution caused by the moisture in the slag when it is landfilled. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial structural cross-sectional view of the annular steam pipe of this utility model.

[0017] In the diagram: 1. Water-cooled frame; 2. Slag remover; 21. Horizontal section of slag remover; 22. Inclined section of slag remover; 3. Steam treatment assembly; 31. Exhaust pump; 32. Steam delivery pipe; 4. Dewatering assembly; 41. Circular steam pipe; 42. Steam inlet pipe; 43. Condensate outlet pipe; 5. Conveyor belt; 6. Slag collection container. Detailed Implementation

[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 protection scope of the present utility model.

[0019] Example 1:

[0020] The slag removal machine evaporation device of this utility model uses steam generated by the waste heat boiler during the incineration of hazardous waste to achieve high-temperature dehydration of the slag on the conveyor belt through thermal radiation. The specific operation method is as follows:

[0021] refer to Figure 1-2 The present invention provides a high-temperature steam dehydration device for a slag remover, comprising a horizontal section 21 of the slag remover assembled into a water-sealed frame 1, a horizontal section 21 of the scraper slag remover within a water-cooled frame 1, an inclined section 22 of the slag remover, and a high-temperature perforated bottom plate conveyor belt 5. The slag produced by incineration falls from above into a water-sealed frame 1 containing water for cooling. It is then conveyed by the horizontal section 22 of the slag remover to the inclined section 21 of the slag remover. The two sections are connected by gears. The inclined section 21 of the slag remover is independent of the conveyor belt 5 and is not connected. A retention trough is used between the inclined section 21 of the slag remover and the inclined section of the conveyor belt 5 to allow the slag to fall down and onto the conveyor belt 5. Above the conveyor belt 5, there is a ring-shaped high-temperature zone composed of several parallel pipes. The outer wall of the pipes is surrounded by carbon steel plates to ensure uniform temperature. The carbon steel plates are wrapped with steel plates and insulation cotton to form a heat insulation layer. At the same time, the conveyor belt is a carbon steel bottom plate with small holes for drainage to prevent water from accumulating at the bottom and making it difficult to reduce moisture. The water vapor generated by the high-temperature dehydration of the slag can be extracted by the dehydration components to prevent corrosion caused by long-term water vapor impact. Finally, the slag falls into the slag collection container 6.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature dewatering device for rotary kiln slag, comprising a cooling container (1), a slag remover (2), a transmission belt (5), a steam treatment assembly (3), and a slag collection container (6) arranged sequentially, characterized in that: The transmission belt (5) is provided with a dehydration component (4), which includes an annular steam pipe (41) that is arranged around the transmission belt (5) to form a high-temperature dehydration zone. The cooling container (1) contains a cooling medium. The slag remover (2) includes a slag remover inclined section (22) immersed in the medium for receiving and conveying the slag immersed in the medium for cooling, and a slag remover horizontal section (21) that cooperates with the slag remover inclined section (22) to convey the cooled slag. The transmission belt (5) is set below the conveying end of the slag remover horizontal section (21) for receiving the cooled slag and for conveying the slag to the slag collection container (6). The annular steam pipe (41) is wrapped around the outside of the transmission belt (5) and has a space between it and the upper surface of the transmission belt (5) for forming a high-temperature dehydration zone.

2. The rotary kiln slag high-temperature dewatering device according to claim 1, characterized in that: The outer surface of the annular steam pipe (41) is covered with a corrosion-resistant carbon steel plate, the carbon steel plate is covered with a heat insulation cotton layer, and the heat insulation cotton layer is covered with a steel plate for protection.

3. The rotary kiln slag high-temperature dewatering device according to claim 1, characterized in that: The annular steam pipe (41) is provided with a steam inlet pipe (42) for introducing high-temperature steam and a condensate outlet pipe (43) for discharging condensate.

4. The rotary kiln slag high-temperature dewatering device according to claim 1, characterized in that: The steam treatment component (3) includes an exhaust pump (31), which is connected to a steam delivery pipe (32) for absorbing steam from high-temperature evaporation. The steam delivery pipe (32) includes a hose connected to the exhaust pump (31), and a bucket-shaped adsorption hood is provided at the end of the hose. The adsorption hood is located in the high-temperature dehydration area.

5. The rotary kiln slag high-temperature dewatering device according to claim 1, characterized in that: The horizontal section (21) of the slag remover and the transmission belt (5) are equipped with retention grooves. The retention grooves are used to guide the slag conveyed by the horizontal section (21) of the slag remover so that it falls into the high-temperature dehydration area on the transmission belt (5).

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