一种循环流化床锅炉炉底排渣热回收装置

Abstract

本实用新型涉及锅炉余热回收技术领域，具体为一种循环流化床锅炉炉底排渣热回收装置，包括滚筒式冷渣机，滚筒式冷渣机上具有热交换管，热交换管一端连接至锅炉补水系统，滚筒式冷渣机两端分别具有冷渣机进渣口和冷渣机排渣口，锅炉的排渣管从冷渣机进渣口插入至滚筒式冷渣机内部，冷渣机排渣口位置设置有能够收集灰渣并去除灰渣扬尘的冷却渣收集器。本实用新型通过在冷渣机排渣口位置设置有能够收集灰渣并去除灰渣扬尘的冷却渣收集器，经冷却的灰渣从冷渣机排渣口可以排入冷却渣收集器内，冷却渣收集器不仅能够收集从冷渣机排渣口排出的灰渣，还能去除灰渣排出时形成的扬尘，从而达到减少冷渣机排渣时扬尘的目的，减少对周围环境的扬尘污染。

Claims

1. A circulating fluidized bed boiler furnace bottom slag discharge heat recovery device, characterized by, The system includes a drum-type slag cooler (100), which has a heat exchange tube (200) connected at one end to a boiler feedwater system (300). The drum-type slag cooler (100) has a slag inlet (110) and a slag outlet (120) at both ends. The boiler's slag outlet pipe (400) is inserted into the drum-type slag cooler (100) from the slag inlet (110). A cooling slag collector (500) is provided at the slag outlet (120) to collect ash and remove dust.

2. The bottom ash heat recovery device for a circulating fluidized bed boiler according to claim 1, characterized by: The cooling slag collector (500) includes a collection container (510) with an inlet (511) at the top. Inside the collection container (510) located on both sides below the inlet (511), there is a rotatable dust removal plate (520). The dust removal plate (520) has a hollow structure. The bottom of the dust removal plate (520) has a vent hole (521) communicating with its interior. The vent hole (521) is covered with a dust removal cotton cloth (530). The interior of the dust removal plate (520) is connected to an air pump (540) through an exhaust pipe (550). An adjustment frame (560) for driving the dust removal plate (520) to rotate is connected between the dust removal plate (520) and the collection container (510).

3. The bottom ash heat recovery device for a circulating fluidized bed boiler according to claim 2, characterized by: The collection container (510) includes a lower container (513) and an upper container (512), which are detachably fixedly connected by bolts and nuts (514).

4. The circulating fluidized bed boiler bottom slag discharge heat recovery device according to claim 2, characterized in that: The exhaust pipe (550) includes a hollow rotating shaft (551) communicating with the dust collector plate (520) and a connecting main pipe (552). The rotating shaft (551) is welded and fixed to the dust collector plate (520). The dust collector plate (520) is rotatably connected to the collection container (510) through the rotating shaft (551). One end of the rotating shaft (551) is rotatably inserted into and communicates with the connecting main pipe (552). The connecting main pipe (552) is connected to the exhaust end of the air pump (540).

5. The bottom ash heat recovery device of a circulating fluidized bed boiler according to claim 4, characterized in that: The adjusting frame (560) includes a horizontal bar (561), a vertical bar (562), a drive rod (563), and a return spring (564). The horizontal bar (561) and the vertical bar (562) are perpendicularly connected to each other. A sliding groove (5610) is provided on the horizontal bar (561). One end of the drive rod (563) is fixedly connected to the rotating shaft (551), and a connecting post (569) is fixedly provided at the other end of the drive rod (563). The connecting post (569) slides. It is rotatably connected to the slide groove (5610). A connecting seat (567) is fixedly provided on the outer wall of the collection container (510). The vertical rod (562) can movably pass through the connecting seat (567). A limiting plate (565) is also fixedly provided on the vertical rod (562). The reset spring (564) is sleeved on the vertical rod (562), and the two ends of the reset spring (564) abut against the connecting seat (567) and the limiting plate (565) respectively.

6. The bottom ash heat recovery device for a circulating fluidized bed boiler according to claim 4, characterized by: An arc-shaped sealing gasket (570) is provided at a position near the rotatable connection between the dust removal plate (520) and the collection container (510), and the sealing gasket (570) is embedded in the inner wall of the collection container (510).

7. The circulating fluidized bed boiler bottom slag discharge heat recovery device according to claim 1, characterized in that: The heat exchange tube (200) is spiral-shaped and fitted around the outside of the drum-type slag cooler (100).

8. The bottom ash heat recovery device for a circulating fluidized bed boiler according to claim 1, characterized by: The drum-type slag cooler (100) is driven to rotate by a rotary drive device, and the inner wall of the drum-type slag cooler (100) is provided with spiral propulsion blades (140).

9. The bottom ash heat recovery device of a circulating fluidized bed boiler according to claim 8, characterized in that: The diameter of the slag discharge port (120) of the slag cooler is the same as the inner diameter of the drum-type slag cooler (100).

10. The bottom ash heat recovery device for a circulating fluidized bed boiler according to claim 1, characterized by: The heat exchange tube (200) has an inlet end (210) and an outlet end (220), and the outlet end (220) of the heat exchange tube (200) is movably connected to the boiler water supply system (300) via a rotary joint.

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