Settled ash conveying system and method

[0020]The present invention will be further described below in conjunction with the drawings.

[0021]Seefigure 1, A settling ash conveying system, including a boiler 1, a settling ash hopper 4 is set at the turning point of the boiler 1, a slag drying machine 2 is set below the boiler 1, and the lower part of the settling ash hopper 4 is connected to a settling ash bin 6, a settling ash bin 6 The dry slag conveying pipeline 7 is connected with the dry slag machine 2, a dry slag conveying steel belt 3 is arranged under the dry slag machine 2, and an ash outlet is provided on the dry slag machine 2. An inlet shut-off door 5 is provided on the connecting pipeline between the settling ash hopper 4 and the settling ash bin 6. An air lock 8 is provided on the settled ash transportation pipeline 7. One end of the settled ash transportation pipeline 7 is located in the dry slag machine 2. The ash outlet adopts bell mouth 9.

[0022]When the boiler load is high and the coal ash content is large, although the settled ash column in the settled ash transportation pipeline has a self-sealing effect, it prevents the air in the dry slag machine from sucking into the settling ash hopper. However, in order to increase the scope of application to boiler load and coal ash content, an air lock is installed on the settled ash conveying pipeline to prevent air in the dry slag machine from being sucked into the settling ash hopper when the ash column cannot be effectively formed in the settled ash conveying pipeline.

[0023]When in use, after the boiler 1 burns, the flue gas carries fly ash to the settling ash hopper 4, where the flue gas rotates sharply. Under the action of gravity and centrifugal force, some large particles in the fly ash are separated from the fly ash here. The sedimentation ash is formed and enters the sedimentation ash hopper 4, and the sedimentation ash enters the sedimentation ash silo 6 through the connecting pipe and the entrance shut-off door 5. The exit of the sedimentation ash silo 6 is connected with the entrance of the sedimentation ash transportation pipeline 7 when the boiler load is high and the coal ash content is large. , The amount of settled ash is large, and the settled ash transportation pipeline 7 can form a self-sealing ash column. However, in order to meet the requirements of the boiler load and the variable ash content of combustion, an air lock 8 is installed on the settled ash transportation pipeline 7 to prevent the boiler load When the combustion ash content is small, a self-sealing ash column cannot be formed, which leads to the problem that the air in the slag dryer 2 escapes to the settling ash hopper 4 and the settling ash bin 6. The conveying pipeline 7 is located in the dry slag machine 2, and a bell mouth 9 is installed above the steel belt 3 of the dry slag machine. The sedimentation ash itself formed by the height difference between the dry slag machine 2 and the dry slag machine conveying the steel belt 3 is used by the sedimentation hopper 4 Gravity, while simultaneously using the negative pressure of the boiler in the slag dryer 2 and the suction formed by the bell mouth 9, achieve the purpose of automatic transportation of the settled ash. The settled ash falls from the bell mouth 9 to the conveyor belt 3 of the dry slag machine, and enters the dry slag bin along with the boiler dry slag, and is stored and transported together with the dry slag.