A tail heat recovery and dedusting coal-fired boiler
A coal-fired boiler and tail heat recovery technology, applied in the field of coal-fired boilers, can solve the problems of personnel and equipment safety accidents, strong vibration, etc., and achieve the effects of reliable use, high strength and material saving
Active Publication Date: 2017-11-28
山东格林凯瑞精密仪器有限公司
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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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Embodiment Construction
[0033] The present invention will now be further described in detail with reference to the accompanying drawings.
[0034] like figure 1 , figure 2 , image 3 and Figure 4 The tail heat recovery and dust removal type coal-fired boiler shown includes a boiler main body 1 and an induced draft fan A. The exhaust pipe of the boiler main body 1 is successively connected through an air preheater 2, a water preheater 4, a cyclone 5 and a granite precipitator 10. After the induced draft fan A is exhausted; the air inlet end of the shell side of the air preheater 2 is connected to the blower 3, and the 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 water 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 face plate 38 and a blade 31, and the...
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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 removal type coal-fired boiler which guides the fan without dust accumulation. 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 their mature technology and low fuel costs. However, coal-fired boilers need to The exhaust heat recovery, dust removal, harmful gas purification and other operations are carried out on the exhaust gas. [0003] The induced draft fan is the key equipment for coal-fired boilers to achieve tail heat recovery and dust removal. Most of the induced draft fans used in the boiler are centrifugal fans. The continuous, stable and reliable operation of the induced draft fan is very important. Because most coal-fired boilers are used in places that contain a certain amount of dust , When the induced draft fan is working, when ...
Claims
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IPC IPC(8): F23J15/02F23J15/06F23L15/00F04D29/28F04D29/30
CPCY02E20/34
Inventor 许丽
Owner 山东格林凯瑞精密仪器有限公司