CN-121977217-A - Rotor type cleaning device suitable for power station boiler flame angle horizontal flue dust deposit

CN121977217ACN 121977217 ACN121977217 ACN 121977217ACN-121977217-A

Abstract

The embodiment of the disclosure provides a rotor type cleaning device suitable for dust accumulation in a horizontal flue of a folding flame holder of a power station boiler, which comprises a rotor assembly, a transmission mechanism in transmission connection with the rotor assembly and used for transmitting power, and a power output end of a driving unit in transmission connection with the transmission mechanism and used for providing driving force. In the application, the mechanical driving rotor wing assembly of the driving unit is adopted to rotate so as to break and push accumulated ash, and the technical problem that the existing soot blowing technology cannot be put into operation due to insufficient steam pressure when the boiler depth peak is regulated (low load) is solved. Meanwhile, the blowing damage, corrosion and cold and hot impact damage to the heating surface caused by steam or compressed air blowing are avoided, the structure is relatively simple, the operation economy is higher, the horizontal flue dust can be effectively removed in real time, and the operation safety and economy of the unit are obviously improved.

Inventors

SHE YUANYUAN
LIU HONGGANG
ZHOU PING
WANG CHAOWEI
ZHOU LINGYU
Hu Zikun

Assignees

西安热工研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260309

Claims (10)

1. Rotor type clearing device suitable for power plant boiler book flame angle horizontal flue deposition, its characterized in that includes: a rotor assembly; the transmission mechanism is in transmission connection with the rotor wing assembly and is used for transmitting power; and the power output end of the driving unit is in transmission connection with the transmission mechanism and is used for providing driving force.
2. The rotor-type cleaning device for power station boiler turndown horizontal flue dust as recited in claim 1, wherein the rotor assembly includes a shaft drivingly connected to the drive mechanism and blades disposed on the shaft.
3. A rotor-type cleaning device for horizontal flue dust deposition at the turndown angle of a utility boiler according to claim 2, wherein there are two blades, and the two blades are symmetrically disposed with respect to the axis of the rotating shaft.
4. A rotor-type cleaning device for power station boiler turndown horizontal flue dust deposition according to claim 2, wherein the blades are wedge-shaped and sheet-like, and the blade height of the blades is tapered from the blade root to the blade tip direction of the blades.
5. A rotor-type cleaning apparatus for power station boiler turndown horizontal flue dust deposition as recited in claim 2, wherein said blades include opposed spaced apart leading and trailing edges and blade tips smoothly connected between said leading and trailing edges; the rear edge is arranged straight, and the front edge and the rear edge are arranged at an included angle.
6. A rotor-type cleaning device for the horizontal flue dust collection of a turndown of a utility boiler according to claim 5, wherein the trailing edge is disposed at an acute angle to the leading edge.
7. A rotor-type cleaning device for power station boiler dog-ear horizontal flue dust deposition according to claim 1, wherein the transmission mechanism comprises meshing gears and chains, the transmission mechanism being configured to transmit the driving force of the driving unit to the rotor assembly via the meshing gears and chains.
8. A rotor-type cleaning device for folded-flame horn horizontal flue dust deposition of utility boilers as recited in claim 1, wherein the drive unit includes an electric motor.
9. A rotor-type cleaning device for power station boiler turndown horizontal flue dust deposition according to claim 1, wherein the blades of the rotor assembly have an adjustable angle structure, wherein the drive unit controls the rotation of the blades to a dust breaking angle via the adjustable angle structure.
10. The rotary wing type cleaning device suitable for the horizontal flue dust deposition of the turndown flame holder of the power station boiler according to claim 7, wherein gears and chains of the transmission mechanism are made of high-temperature resistant and wear-resistant materials.

Description

Rotor type cleaning device suitable for power station boiler flame angle horizontal flue dust deposit Technical Field The embodiment of the disclosure belongs to the technical field of flue cleaning equipment, and particularly relates to a rotor type cleaning device suitable for dust deposition of a horizontal flue of a folding flame holder of a power station boiler. Background Aiming at the problem of dust accumulation in a horizontal flue of a flame folding angle of a power station boiler, the existing main technical scheme comprises the steps of adding a long telescopic soot blower, adding a hood type turbulent soot blower and a gravity turning plate type ash conveying device. In the existing ash removal technical scheme, the long telescopic ash blower is added to be most widely applied. The technical scheme mainly comprises a long telescopic soot blower, a soot blowing steam main pipe, a branch pipe, a soot blowing electric door, a manual door, a drainage electric door, a manual door and the like, wherein superheated steam led out by a screen-type superheater or a low-temperature reheater or an auxiliary steam header is used as a soot blowing steam source to purge and disturb stored soot, and then fly ash particles are taken away by flowing flue gas. In practical application, the technical scheme has a plurality of limiting factors or adverse effects, and particularly comprises the following steps that firstly, because the steam soot blowing pressure is large, the coverage area is wide, a high-temperature heating surface is required to be avoided in the installation process, the installation space is limited, and meanwhile, the vertical distance from the bottom of the horizontal flue is about 1m, so that the influence on the existing soot layer of the horizontal flue is limited. The soot blower for horizontal flue dust deposition, which is newly added in an individual power plant, is required to protect the adjacent high-temperature heating surface by an anti-abrasion sleeve, so that the heat exchange efficiency is reduced, the anti-abrasion protection shell is easy to fall off in a long-term high-temperature environment, and the high-temperature heating surface can be quickly blown to be thinned. Secondly, the minimum valve front pressure of the long telescopic soot blower is designed to be 1.5-3.0 MPa, and almost all power station boilers are difficult to meet the pressure parameter in a deep peak shaving operation mode, namely, the long telescopic soot blower does not have steam soot blowing conditions under the load of less than 60%Pe, and horizontal flue dust deposition happens in the load stage. With the deep peak regulation time length and the daily rapid increase, the condition that a plurality of power station units do not have soot blowing for 1-3 days is completely possible, the horizontal flue load exceeds the design parameters, and large-area soot collapse is easy to occur. Third, the operation of the soot blower reduces the running economy of the unit, taking a 300 MW unit as an example, the consumption of steam is about 800 kg per operation of the IK-545 long telescopic soot blower. As for the acoustic wave soot blower, only some loose dust deposits can be removed, the energy is small, and the special cohesive acid dust deposits, serious dust blockage and hard salt scale cannot be removed for a hearth and a convection heating surface. At present, a few power station boilers are provided with a hood type turbulent flow ash removing device, and the ash removing system takes compressed air or superheated steam as a steam source and specifically comprises a hood, an electromagnetic valve, a main pipe, an air compressor, a pressure gauge, a valve and the like. In practical application, high-pressure normal-temperature high-pressure air is often used as a purging air source, and because of the extremely large temperature gradient between the compressed air and the high-temperature heating surface at the corresponding position, the stress concentration of the heating surface at the corresponding position is extremely easy to cause, so that the problems of pipe wall deformation, bulge or cracking occur. The gravity turning plate type ash conveying system aims at arranging an ash bucket at the bottom of a horizontal flue, and introducing deposited ash into the ash bucket of the coal economizer through an ash dropping pipe. The technology has less performance and large investment in domestic application, generally influences the overall structure of the boiler and the layout of the water-cooled wall, has large opening construction difficulty, and can cause coarse ash to block the system in the operation of the ash dropping pipe. In a word, the existing ash removal device for the folded flame angle horizontal flue of the power station boiler has the problems of limited operation parameters, poor system stability, high construction difficulty (a gravity turnover type ash conveying system), multiple s