Energy saving improving method for circulating fluid bed coal-fired boiler economizer

A circulating fluidized bed and coal-fired boiler technology, which is applied in the direction of combustion methods, fluidized bed combustion equipment, and fuel burned in a molten state, can solve the problems of non-compliance with environmental protection indicators and high NOx emissions, and achieve short cycle times and reduced NOx Emissions and the effect of reducing environmental pollution

Active Publication Date: 2017-01-04
江苏汇能重工有限公司
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Problems solved by technology

However, the existing 75t/h circulating fluidized bed coal-fired boiler has problems such as high NOx emissions after the boiler is

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  • Energy saving improving method for circulating fluid bed coal-fired boiler economizer
  • Energy saving improving method for circulating fluid bed coal-fired boiler economizer
  • Energy saving improving method for circulating fluid bed coal-fired boiler economizer

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Embodiment Construction

[0035] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0036] Economizer energy-saving renovation methods for circulating fluidized bed coal-fired boilers, such as figure 1 and figure 2 As shown, the economizer includes an upper-level economizer 1, an SCR catalyst structure 2, and a lower-level economizer 3 connected from top to bottom in the boiler. The upper-level economizer 1 is equipped with an upper-level economizer outlet header 4 and The upper membrane economizer tube 5 and the lower economizer 3 are provided with the lower economizer inlet header 6 and the lower membrane economizer tube 7, and the transformation of the economizer energy saving method includes at least the following steps:

[0037] A. Move the upper-leve...

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Abstract

The invention discloses an energy saving improving method for a circulating fluid bed coal-fired boiler economizer. The economizer comprises an upper-level economizer body, an SCR catalyst structure and a lower-level economizer body, all of which are connected into a boiler from top to bottom. The upper-level economizer body is provided with an upper-level economizer body outlet container and an upper film type economizer pipe. The lower-level economizer body is provided with a lower-level economizer body inlet container and a lower film type economizer pipe. The energy saving improving method for the economizer at least comprises the following steps that A, the upper-level economizer body moves upwards, and the lower-level economizer body moves downwards; B, the upper film type economizer pipe is cut; and C, the lower-level economizer body outlet container and the upper-level economizer body inlet container are additionally arranged, meanwhile, the lower-level economizer body outlet container is connected to a water way of the upper-level economizer body through a first pipeline, and the upper-level economizer body inlet container is connected to a water way of the lower-level economizer body through a second pipeline. After the above technology improvement is finished, the integral water pressure test is conducted. According to the energy saving improving method for the economizer, Nox emission of the boiler is reduced, environment pollution is reduced, and the current environment protection requirement is met.

Description

technical field [0001] The invention relates to the technical field of energy-saving transformation of a 75t / h circulating fluidized bed coal-fired boiler economizer, in particular to a method for energy-saving transformation of a circulating fluidized bed coal-fired boiler economizer. Background technique [0002] Circulating fluidized bed boiler technology is a high-efficiency, low-pollution and clean combustion technology that has developed rapidly in the past ten years. Internationally, this technology has been widely used commercially in the fields of power station boilers, industrial boilers and waste treatment and utilization, and is developing towards large-scale circulating fluidized bed boilers with a scale of hundreds of thousands of kilowatts; domestic research and development in this area And applications are also gradually emerging, and hundreds of circulating fluidized bed boilers have been put into operation or are being manufactured. [0003] The boiler ado...

Claims

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Application Information

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IPC IPC(8): F23C10/18F22D1/00
CPCF22D1/00F23C10/18
Inventor 陈伟陈云龙
Owner 江苏汇能重工有限公司
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