CN205897192U - Thermal power factory double suction centrifugation primary air fan air inlet crosswind way structure - Google Patents

Abstract

The utility model provides a thermal power factory double suction centrifugation primary air fan air inlet crosswind way structure which characterized in that: adopt one 30~50 bend radius's fan -shaped wind channel entry elbow as the inlet scoop in main horizontal wind channel in the entrance of horizontal inlet scoop, fan -shaped wind channel entry elbow is divided into two at the back and connects two branch wind channel elbows and form two branch wind channels, and two middle median septums that set up in the owner horizontal wind channel of branch wind channel before separately. The utility model discloses " one minute two " structural style solves and arranges that the space is nervous, props up and hangs and weld difficult problem, the wind channel entry adopts fan -shaped structure effect inlet scoop, reduces the turbulent emergence in entrance to air duct's operating vibration has been avoided, increasing the median septum, reducing elbow and reducing pipe etc. And make air mobile distribution in wind channel entrance even, low drag profile consumes, merge wind channel save material volume, and its structure safe and reliable, the economical operation guaranteed, reduce the fan power consumption.

Description

Thermal power plant double-suction centrifugal pump primary air fan inlet side air channel structure

Technical field

This utility model belongs to power plant air and gas system cigarette air channel abnormity piece optimization, resistance optimization technology, especially relates to Thermal power plant centrifugal double suction fan inlet side air channel structure form.

Background technology

Thermal power plant 300mw grade unit boiler primary air fan typically adopts frequency control centrifugal blower at present, due to Air quantity is relatively large, adopts double suction form fan induced draught more.Generally double suction fan air inlet crosswind road is arranged as double air channels+bis- Air port, but some engineerings are limited by boiler rear portion arrangement condition, and primary air fan double suction inlet side air channel and inlet scoop can adopt group Conjunction form to save arrangement space, need to make combined special-shaped part, many elbows and add reducer pipe by this kind of combination type inlet side air channel Form, its structure is for example unreasonable to cause that air channel air current flow is disorderly, resistance is big, thus cause primary air fan operational shock, The high problem of power consumption.

Utility model content

The purpose of this utility model is: when thermal power plant 300mw grade unit boiler double-suction centrifugal pump primary air fan wind When road entrance is limited using combination inlet side air channel arrangement by locus, optimize air channel structure form, it is to avoid air channel is run and shaken Dynamic, fan operation little, the system high efficiency of power consumption.

For achieving the above object, this utility model provides a kind of thermal power plant double-suction centrifugal pump primary air fan inlet side air channel Structure it is characterised in that: horizontal inlet scoop porch adopt one 30 °～50 ° of bending radius fan-shaped tunnel inlet curved As the inlet scoop of main horizontal duct, the two points of air channel elbows of connection that are divided into two after the inlet elbow of fan-shaped air channel form two to head Individual point of air channel, and two points of air channels main horizontal duct middle setting median septum before separately.

This utility model " one-to-two " version, solves arrangement space anxiety, props up and hang and welding difficulty problem；Air channel enters Mouth acts on inlet scoop using sector structure, reduces the generation of porch turbulent flow, thus avoiding the operational shock of air channel body；Increase Median septum, reducing elbow and reducer pipe etc. makes air flow at tunnel inlet evenly distributed, reduces resistance consumption；Merge air channel section Material saving is measured, and its structure safe and reliable it is ensured that economical operation；Reduce blower fan power consumption.

Brief description

Fig. 1 is this utility model structural representation.

Specific embodiment

As shown in figure 1,1, tunnel inlet flange and filter screen, 2, fan-shaped air channel inlet elbow, 3, point air channel long radius Elbow, 4, median septum

Adopt the fan-shaped air channel inlet elbow 2 of one 30 °～50 ° of bending radius in the porch of horizontal inlet scoop as master The inlet scoop of horizontal duct, be divided into two after the inlet elbow of fan-shaped air channel two points of air channel long radius elbow 3 shapes of connection Become two point air channels, and two point air channels main horizontal duct middle setting median septum 4,5 before separate be air channel inner support with External reinforcement rib.

During work, cold wind is curved by tunnel inlet flange and filter screen 1, fan-shaped air channel inlet elbow 2, point air channel long radius 3 eventually enter into double suction primary air fan 6, form a cold wind air inlet system of complete set.

Claims (1)

1. a kind of thermal power plant double-suction centrifugal pump primary air fan inlet side air channel structure it is characterised in that: in horizontal inlet scoop Porch adopts the inlet scoop as main horizontal duct for the fan-shaped air channel inlet elbow of one 30 °～50 ° of bending radius, sector wind The two points of air channel elbows of connection that are divided into two after road inlet elbow form two points of air channels, and two points of air channels are before separately Main horizontal duct middle setting median septum.