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Tail gas recovery dust removal type coal-fired boiler

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

Active Publication Date: 2015-11-18
山东格林凯瑞精密仪器有限公司
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  • Summary
  • 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 induced draft fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents

Method used

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  • Tail gas recovery dust removal type coal-fired boiler
  • Tail gas recovery dust removal type coal-fired boiler
  • Tail gas recovery dust removal type coal-fired boiler

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Embodiment Construction

[0033] Now in conjunction with accompanying drawing, the present invention is described in further detail.

[0034] Such as 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. The blades 31 are arranged in a hollow anti-water ...

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Abstract

The invention discloses a tail gas recovery dust removal type coal-fired boiler. The tail gas recovery dust removal type coal-fired boiler comprises a boiler body and an induced draft fan. A tail gas tube of the boiler body is connected with the inducted draft fan through an air preheater, a water preheater, a cyclone dust collector and a granite dust collector, and then evacuation is carried out. The air inlet end of the shell side of the air preheater is connected with an air blower, and the air outlet end of the shell side of the air preheater is connected with the boiler body. A water inlet tube of the shell side of the water preheater is connected with a high-position pool, and a water outlet tube of the shell side of the water preheater is connected with a boiler water inlet pump. An impeller of the inducted draft fan is provided with a structure with hollow inverted-drop-shaped blades and a dish-shaped back plate. The contour line of the appearance of the induced draft fan is an involute. Two-stage counterflow heat exchange and dry-wet dust removal are carried out on boiler tail gas to achieve tail heat recovery and dust removal operation, and energy saving and emission reducing are achieved. Due to the structure with the inverted-drop-shaped blades and the dish-shaped back plate, dust on the impeller of the induced draft fan is removed in real time, and meanwhile the strength of the impeller of the fan is increased; and stability is improved, potential safety hazards caused by dust accumulation are effectively eradicated, and wide application prospects are achieved.

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): F23J15/02F23J15/06F23L15/00F04D29/28F04D29/30
CPCY02E20/34
Inventor 银永忠姚茂君李志平张旭杨正华
Owner 山东格林凯瑞精密仪器有限公司
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