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Device and method for regulating and controlling fly ash deposition layer based on impinging stream technology

A technology of deposition layer and impinging flow, which is applied in the direction of combustion method, lighting and heating equipment, removal of solid residue, etc., can solve the problem of ash in the heating area of ​​the boiler, and achieve the effects of improving efficiency, facilitating regulation, and reducing viscosity

Pending Publication Date: 2021-01-05
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0007] In view of the fact that the existing technology is difficult to effectively solve the problem of serious ash accumulation on the heating surface of the boiler during the combustion and utilization of high-alkalinity contaminated coal, a device and method for regulating the fly ash deposition layer based on impinging flow technology is provided.

Method used

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  • Device and method for regulating and controlling fly ash deposition layer based on impinging stream technology
  • Device and method for regulating and controlling fly ash deposition layer based on impinging stream technology

Examples

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Embodiment 1

[0032] Based on the ash problem in the heating area of ​​the boiler when using high-alkali coal such as Zhundong coal, this example proposes a method to control the fly ash deposition layer. The surface of coal fly ash is coated with nanoparticles, so that the fly ash particles are modified. By coating the surface of high-alkali coal-burning fly ash with nanoparticles, the surface viscosity can be effectively reduced, and the structure and composition of the fly ash deposition layer can be regulated, so as to significantly improve the ash deposition problem.

Embodiment 2

[0034] Specifically, the method for controlling the fly ash deposition layer in this embodiment uses impinging flow technology to coat the surface of the high-alkali coal-fired fly ash with nanoparticles, and the nanoparticles can be preferably SiO2 according to the situation. 2 、Al 2 o 3 、TiO 2 or kaolin.

Embodiment 3

[0036] Such as figure 1 As shown, the device for controlling the fly ash deposition layer based on impinging flow technology in this embodiment includes a high-temperature furnace 4, a nanoparticle injection system and a fly ash injection system, and the nanoparticle injection system and the fly ash injection system are respectively used to inject Nanoparticles and micron fly ash are sprayed inside the high-temperature furnace 4, and the spraying directions are set oppositely. Specifically, the nanoparticle injection system includes a nanoparticle nozzle 5 and a nanoparticle feeding unit, the fly ash injection system includes a fly ash particle nozzle 6 and a fly ash feeding unit, the nanoparticle nozzle 5 and the fly ash particle nozzle 6 The discharge ends of all extend into the interior of the high-temperature furnace 4 and are relatively arranged. The nanoparticles and fly ash are fed through the nanoparticle feeding unit and the fly ash feeding unit respectively, and the...

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Abstract

The invention discloses a device and method for regulating and controlling a fly ash deposition layer based on an impinging stream technology, and belongs to the technical field of ash deposition prevention and control. The device for regulating and controlling the fly ash deposition layer based on the impinging stream technology comprises a high-temperature hearth, a nano-particle spraying systemand a fly ash spraying system, the nano-particle spraying system and the fly ash spraying system are used for spraying nano-particles and micron fly ash into the high-temperature hearth correspondingly, and the spraying directions of the nano-particle spraying system and the fly ash spraying system are oppositely arranged. According to the method for regulating and controlling the fly ash deposition layer, nano-particles are introduced into the high-temperature hearth, so that the surface of coal-fired fly ash is coated with the nano-particles, the surface viscosity of the coal-fired fly ashcan be effectively reduced, the structure and composition of the fly ash deposition layer are regulated and controlled, and finally the purpose of remarkably solving the ash deposition problem is achieved.

Description

technical field [0001] The invention belongs to the technical field of ash deposition prevention and control, and more specifically relates to a device and method for controlling the fly ash deposition layer based on impinging flow technology, which is mainly used to solve the problem of ash and slagging in the heat exchange area of ​​boilers in power plants. At the same time applicable to other related fields. Background technique [0002] High-alkali coal has the advantages of low ignition temperature, high burnout rate, high combustion economy, and low pollutant emissions. It is an excellent power coal and meets my country's energy-saving and emission-reduction goals. However, due to the high alkalinity coal has Na in the ash 2 High content of O and CaO, SiO 2 and Al 2 o 3 Low content, high ash melting point temperature, etc., so it is easy to cause ash accumulation and slagging in the heat exchanger of coal-fired boilers. At present, what has attracted widespread at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J1/06F23J3/02
CPCF23J1/06F23J3/02
Inventor 郑志敏汪洋顾明言
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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