Tail heat recycling and dust removing type coal-fired boiler

A technology for coal-fired boilers and tail heat recovery, applied in the field of coal-fired boilers, can solve problems such as personnel and equipment safety accidents, strong vibration, etc., and achieve the effects of reliable use, high strength, and easy production.

Inactive Publication Date: 2015-12-09
JISHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once part of the hardened dust is shaken off, it will immediately leave the dynamic rotation balance of the induc

Method used

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  • Tail heat recycling and dust removing type coal-fired boiler
  • Tail heat recycling and dust removing type coal-fired boiler
  • Tail heat recycling and dust removing type coal-fired boiler

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Embodiment Construction

[0032] Now in conjunction with accompanying drawing, the present invention is described in further detail.

[0033] like figure 1 , figure 2 , image 3 and Figure 4 The tail heat recovery and dedusting coal-fired boiler shown in the figure includes a boiler main body 1 and an induced draft fan A. The tail gas pipe of the boiler main body 1 is successively connected by an air preheater 2, a water preheater 4, a cyclone dust collector 5 and a granite dust collector 10. The air intake end of the air preheater 2 shell side is connected to the blower 3, and the gas outlet end is connected to the boiler main body 1; the water inlet pipe of the water preheater 4 shell side is connected to the high-level pool 8, and the outlet pipe is connected to the boiler inlet pump 6. The induced draft fan includes a fan impeller 41 and a casing 45. The fan impeller 41 includes an impeller back plate 37, an impeller panel 38 and blades 31, and the blades 31 are arranged in a hollow anti-water...

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Abstract

The invention discloses a tail heat recycling and dust removing type coal-fired boiler. The tail heat recycling and dust removing type coal-fired boiler comprises a boiler main body and an induced draft fan. An exhaust gas pipe of the boiler main body is connected with the induced draft fan sequentially through an air preheater, a water preheater, a cyclone dust remover and a granite dust remover and then is emptied. The air inlet end of the shell pass of the air preheater is connected with an air blower, and the air outlet end of the shell pass of the air preheater is connected with the boiler main body. A water inlet pipe of the shell pass of the water preheater is connected with a high-position water tank, and a water outlet pipe of the shell pass of the water preheater is connected with a boiler water inlet pump. An impeller of the induced draft fan is provided with vanes adopting a structure in a shape of a hollow reverse water droplet. The external contour line of the induced draft fan is an involute. The tail heat recycling and dust removing type coal-fired boiler carries out two-stage counterflow heat exchange and dry and wet two-stage dust removal on boiler exhaust gas so as to realize tail heat recycling and dust removing operation and realize energy conservation and emission reduction. As the vanes adopt the structure in the shape of the hollow reverse water droplet, dust on the impeller of the induced draft fan is cleared in real time, the impeller strength of the fan is increased, the stability is enhanced, and safety accidents caused by dust accumulation are effectively avoided. The application prospect is wide.

Description

technical field [0001] The invention relates to a coal-fired boiler, in particular to a tail heat recovery and dust-removing coal-fired boiler in which a fan does not accumulate dust. Background technique [0002] Boilers are very commonly used thermal power equipment. Coal-fired boilers are still one of the main preferred equipment for heating due to mature technology and low fuel costs. However, coal-fired boilers need to Carry out tail heat recovery, dust removal, harmful gas purification and other operations on the tail gas. [0003] The induced draft fan is the key equipment for coal-fired boilers to realize tail heat recovery and dust removal. Most of the induced draft fans for boilers are centrifugal fans. The continuous, stable and reliable operation of the induced draft fans is very important. Because most of the occasions where coal-fired boilers are used contain certain dust , When the induced draft fan is working, when the air flow passes through the high-speed ...

Claims

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Application Information

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IPC IPC(8): F22D1/36F23J15/02F23J15/04F04D29/28F04D29/30
Inventor 银永忠姚茂君李志平张旭杨正华
Owner JISHOU UNIVERSITY
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