阅读说明：本技术 流化床风水联合冷渣器 (Air-water combined slag cooler of fluidized bed ) 是由 冯大勇 于 2019-04-26 设计创作，主要内容包括：流化床风水联合冷渣器,本发明主要作为循环流化床锅炉的底渣冷却排放设备。本发明要消除流化床冷渣器结焦、堵渣现象,运行不受底渣粒度限制,进出渣控制简便。1、冷渣器进渣高温区域不以任何形式布置物料排放口或事故排渣口,整个布风板自进渣口到出渣口完整均匀,只布置一个出渣口从而起到防止高温区域流化不良造成结焦现象。2、风帽在布风板上纵横交错布置,风帽小孔承一定角度向下倾斜,风帽小孔直径6mm-8mm。3、冷渣器内部为一完整腔体,不采用隔墙进行分割。4、在进渣控制方面采用风力控制,和冷渣器连接的进渣管段与水平夹角14°-25°之间。5、水冷壁采用防磨片防磨,现场增加喷涂防磨。(The invention relates to a fluidized bed air-water combined slag cooler, which is mainly used as bottom slag cooling and discharging equipment of a circulating fluidized bed boiler. The invention aims to eliminate the phenomena of coking and slag blockage of the fluidized bed slag cooler, the operation is not limited by the granularity of bottom slag, and the control of slag inlet and outlet is simple and convenient. 1. The slag inlet high-temperature area of the slag cooler is not provided with a material discharge port or an accident slag discharge port in any form, the whole air distribution plate is complete and uniform from the slag inlet to the slag outlet, and only one slag outlet is arranged, so that the coking phenomenon caused by poor fluidization in the high-temperature area is prevented. 2. The blast caps are arranged on the air distribution plate in a criss-cross mode, the small hole bearings of the blast caps incline downwards at a certain angle, and the diameters of the small holes of the blast caps are 6-8 mm. 3. The inside of the slag cooler is a complete cavity which is not divided by partition walls. 4. The slag feeding control aspect adopts wind power control, and the included angle between a slag feeding pipe section connected with the slag cooler and the horizontal is 14-25 degrees. 5. The water wall is wear-resistant by adopting wear-resistant sheets, and the spraying wear resistance is increased on site.)

1. The invention provides a fluidized bed air-water combined slag cooler of a circulating fluidized bed boiler suitable for burning inferior fuels such as coal gangue, and the like, which is characterized in that: the hot air cooling device comprises a slag inlet pipe, a slag cooling chamber, a cold air chamber, a hot air outlet pipe, a slag outlet pipe, an air distribution plate, a water cooling wall and the like, and is structurally a rectangular box body, the membrane type heated water cooling wall is also used as structural walls on two sides of the device, slag is fed into one end of the cuboid, a slag outlet is arranged on the air distribution plate on the other end, and the hot air outlet pipe is arranged in the middle of the top of the box body; the cooling air passes through the air distribution plate hood through the cold air chamber at the bottom of the slag cooler and enters the slag cooling chamber, so that the hot slag is in a fluidized state, and the slag discharge control cooler realizes the cooling and moving of materials by adopting an air/solid fluidization technology.

2. The invention aims to solve the problem of coking inside the slag cooler, the blast caps of the whole air distribution plate from the slag inlet to the slag outlet are complete and uniform, only one slag outlet is arranged on the air distribution plate in the range from the slag inlet pipe to the slag outlet pipe, and the air distribution plate in the high-temperature area of the slag cooler is not provided with a large slag outlet or an accident slag outlet, so that the coking phenomenon caused by poor fluidization of ash slag in the large slag outlet area is prevented.

3. The second technical characteristic of the device for preventing coking and slag blockage is that the fluidization wind speed is designed to be more than 2.5 m/s.

4. Coking and slag blockage are prevented, and the air speed of the small holes of the air distribution plate blast cap is more than 35 m/s; the included angle between the small hole of the blast cap and the horizontal plane is 15 degrees, and the outer side of the small hole is inclined downwards; the distance between the wind caps does not exceed 110 mm; the diameter of the small hole of the blast cap is 6mm-8 mm.

5. In order to prevent slag blockage, the interior of the slag cooler is a complete cavity, and the slag cooler is not provided with a compartment partition wall.

6. The slag cooler is designed to be integrally light, the refractory castable is laid only on the side of the slag inlet pipe, and the top of the slag cooler is welded with a steel plate and then laid with the castable to prevent abrasion.

7. The water cooling system adopts a membrane type water cooling wall, the water cooling wall adopts an anti-abrasion sheet to prevent abrasion, and when the water cooling heating surface is insufficient, a screen type heating surface is added at the low-temperature section of the slag cooler or a water cooling air distribution plate is adopted.

8. The slag feeding control aspect adopts wind power control, the included angle between a slag feeding pipe section connected with the slag cooler and the horizontal is 14-25 degrees, the angle is determined according to the repose angle of hot slag and the length of the slag feeding pipe section, a slag feeding control air pipe is connected to the other side of the slag cooler along the axial line of a slag feeding pipeline, and the slag feeding amount is controlled by adjusting the slag feeding control air amount.

9. The slag inlet pipe section is provided with a slag inlet cooling pipe.

Detailed description of the preferred embodiments

1. The air distribution plate is perforated by 20# G through laser cutting, and the air cap base is welded.

2. The lower cold air chamber of the air distribution plate is formed by cutting and welding steel plates and is connected with an air inlet pipe and a valve.

3. The water-cooled wall on the air distribution plate consists of membrane tubes. The anti-wear sheet is processed by flat iron and welded on the water wall.

4. The blast cap is cast by alloy, is arranged on the base of the grid plate and then is poured by pouring materials.

5. The slag inlet pipe and the slag outlet pipe are respectively welded on the slag inlet side plate of the slag cooler and the slag outlet of the air distribution plate.

6. The hot air return pipe is welded at the top of the slag cooler

7. And completing the welding and installation work of other shells and brackets.