CN2189491Y

CN2189491Y - Water-cooling square rotation-wind separator with accelerating section

Info

Publication number: CN2189491Y
Application number: CN 93235842
Authority: CN
Inventors: 岳光溪; 张绪祎; 李岩; 陆肖马
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 1993-12-31
Filing date: 1993-12-31
Publication date: 1995-02-15
Anticipated expiration: 2003-12-31

Abstract

The utility model relates to a high-temperature water-cooling cyclone separator, relating to the high-temperature separation device used for circulating fluidized bed boilers. The utility model is characterized in that on the basis of the existing water-cooling square cyclone separator, a curved surface guide plate 2 is additionally arranged at an inlet position, and the curved surface guide plate and a straight wall surface on the inlet position form a gradually reducing-shaped accelerating section C. Besides, a membrane type water-cooling wall or fireproofing materials 3 are used for filling in the separator, and thus, the square corner position of the separator is filled into a circular arc shape. The separator has the advantages of small flow resistance besides easy manufacture, convenient installation and other advantages existing in the existing water-cooling square separator, and the rotary air current is easy to form a vortex. As a consequence, the utility model further raises the separation efficiency and brings great benefit for the circulating characteristic of boilers.

Description

Water-cooling square rotation-wind separator with accelerating section

The utility model relates to a kind of separator, particularly relates to the high temperature cyclone separator that a kind of CFBB is used.

In the prior art, traditional CFBB mostly adopts garden tubular cyclone separator, and its inner non-metallic refractory that adopts mostly constitutes, and this separator is bulky, and is heavy and be prone to problem such as inner slagging scorification.

For addressing the above problem, U.S. Foster Wheeler company has developed a kind of water-cooled cyclone separator, be characterized in that forming the whirlwind tube with fin panel casing replaces refractory material to bear high temperature, though this kind separator has been avoided above-mentioned defective, but owing to make traditional whirlwind tube with water-cooling wall, its complex process is made difficulty, and can not well mate with boiler itself, therefore be difficult in industrial generally employing.

For solving problems of the prior art, Finland Ahlstrom company had developed a kind of water-cooled square cyclone separator (patent No.: EP481438) in 1992, this separator still adopts fin panel casing to constitute, but broken through the notion that whizzer in the past must make the garden tubular, adopt square, even polygonal cross-section.The advantage of this separator is that it has not only avoided bulky, the heavy and easy defective of slagging scorification in tube of traditional cyclone separator, avoided again making difficulty in the manufacturing that the garden tubular brought with water-cooling wall, and the layout in boiler is also very convenient.But experimental result shows that this separator is because import department's design is unreasonable, and the effect at the inner polygon of separator turning, causes flow resistance to become big, and particle quickens not enough, influences gas flow characteristic.From characteristic curve, produced a poor efficiency district in big particle diameter section, this exerts a certain influence not only for the circulation of whole boiler, and separative efficiency is descended to some extent.

The purpose of this utility model and task are deficiency and the defectives that exists at prior art, and for CFBB provides a kind of high-temperature water cooling cyclone separator, this separator can further improve separative efficiency, can reduce flow resistance effectively again.

The utility model is achieved in that this separator constitutes with fin panel casing, its cyclone separating chamber cross section is a polygon, adopt at least one smoke inlet, it is characterized in that increasing by a curved guide plate at the separator inlet place, the wall always of this curved guide plate and its porch forms convergent shape accelerating sections.

The utility model compared with prior art has following advantage and beneficial effect: this separator removes that to have the manufacturing process that the Water Cooled Square Cyclone device had simple, be easy to outside the advantages such as installation, owing to increased curved guide plate in the porch, not only further improved the separative efficiency of separator, the phenomenon that the efficient that has occurred when having avoided particle diameter big reduces, drawback such as the fluid resistance of also having avoided causing owing to the unexpected diffusion of gas becomes greatly, the boiler cycle characteristics is bad; The porch is adopted convergent shape accelerating sections and is filled to the garden arc in its polygon corner with fin panel casing or refractory material in addition, can make the easier formation vortex of revolution air-flow, from flow resistance with separate two aspects and all bring very big benefit.

Fig. 1 is the front view of the high-temperature water cooling square cyclone separator of band accelerating sections;

Fig. 2 is the A-A cutaway view among Fig. 1;

Fig. 3 is the sectional drawing of high-temperature water cooling square cyclone separator that square corner is filled to the band accelerating sections of garden arc with water-cooling wall or refractory material.This chart shows the internal structure and the shape of this separator.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing: cyclone separating chamber's 1 usefulness fin panel casing of separator constitutes, and square or other polygon is adopted in its cross section, and smoke inlet 4 adopts one or several, opens on the straight wall on separator top.Increase by a curved guide plate 2 in the porch, a of the wall always garden of this deflector and porch slips over to be crossed, and forms convergent shape accelerating sections c with another wall b.In order further to reduce flow resistance, make the easier formation vortex of revolution air-flow, can on the basis that increases curved guide plate, with fin panel casing or refractory material 3 square corner be filled to garden arc (as shown in Figure 3) in separator inside.Above-mentioned curved guide plate can adopt fin panel casing or refractory material to make, and flue gas after being purified is discharged by the exhanst gas outlet 5 on separator top.

Claims

1, a kind of high-temperature water cooling cyclone separator adopts polygonal cross-section, and has a smoke inlet at least, and it is characterized in that increases a curved guide plate [2] in the porch, and the wall always of this curved guide plate and its porch forms convergent shape accelerating sections.

2,, it is characterized in that being filled to the garden arc with fin panel casing or refractory material ［ 3 ］ in the polygon corner of separator inside according to the described high-temperature water cooling cyclone separator of claim 1.