Settled ash conveying system and method

A technology of conveying system and settling ash, which is applied in the direction of combustion method, lighting and heating equipment, and treatment of combustion products. It can solve problems such as ash blocking, increased maintenance, and increased power consumption, so as to achieve enhanced fluidity and reliable operation. , The effect of convenient maintenance

Pending Publication Date: 2021-02-26
XIAN THERMAL POWER RES INST CO LTD
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AI-Extracted Technical Summary

Problems solved by technology

Due to the complexity of the pipeline, ash plugging often occurs, the maintenance and repair of ...
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Method used

When the boiler load is high and the coal-fired ash content is large, although the settled ash column in the settled ash conveying pipeline has a self-sealing effect, it prevents the air in the dry slag machine from sucking into the settled ash hopper. However, in order to improve the scop...
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Abstract

The invention discloses a settled ash conveying system and method. According to the settled ash conveying system and method, fly ash generated after combustion of a boiler reaches an economizer alongwith the flowing direction of smoke and is separated in a settled ash hopper, an inlet closing door is arranged at an inlet of a settled ash bin, and when equipment goes wrong and needs to be overhauled, related equipment can be isolated, so that overhauling is facilitated. The height of the settled ash hopper in the vertical direction is far larger than the height of the joint of the system and adry slag machine and the height of the joint of the system and a dry slag machine steel belt, and the purpose of ash conveying can be achieved through the gravity of settled ash. The dry slag machineand the dry slag machine steel belt communicate with a boiler cold ash hopper, negative pressure exists at the position, the suction effect on the settled ash falling to the position can be achieved,and the fluidity of the settled ash is enhanced. According to the boiler load and the coal ash content condition, part of the system is selectively isolated through the inlet closing door, and the operation mode is flexible and changeable.

Application Domain

Chimneys

Technology Topic

SlagSteel belt +5

Image

  • Settled ash conveying system and method

Examples

  • Experimental program(1)

Example Embodiment

[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.

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Description & Claims & Application Information

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