CN2503993Y

CN2503993Y - Cyclone separator for boiler

Info

Publication number: CN2503993Y
Application number: CN 01244129
Authority: CN
Inventors: 孙甲成; 张全峰; 吴善洪; 李朝花; 吴茂峰; 刘作
Original assignee: Jinan Boiler Group Co ltd
Current assignee: Jinan Boiler Group Co ltd
Priority date: 2001-07-30
Filing date: 2001-07-30
Publication date: 2002-08-07
Anticipated expiration: 2011-07-30

Abstract

The utility model relates to a cyclone separator used for a boiler, and the cyclone separator used for a boiler consists of a cyclone casing body, a dipleg, a spiral casing, an annular collecting box, a concrete layer, a thermal insulation material layer and a steel guard plate. Because the method of cooling water to decrease temperature, the water cooled steel frame casting abrasion proof refractory material and the spiral casing type structure are adopted synthetically, the stability of the long-term safe operation of the boiler is guaranteed, the separation efficiency is improved to more than 98 percent from the original 88 percent, the combustion efficiency of the boiler is improved by five to ten percent, the energy saving and the consumption reducing are obvious, and the boiler products are large-sized. The separator can be used for circulating fluidized bed boilers of various parameters of 35t/h-670t/h, and can be supplied with technical support for the development towards large-scale of the circulating fluidized bed boiler.

Description

The boiler cyclone separator

The utility model belongs to an important device in the boiler, particularly be the boiler cyclone separator of the high temperature heat of dissociation ash used of medium-and-large-sized ciculation fluidized boiler.

The cycling hot ash of general CFBB needs a separator to finish separating of heat ash and flue gas, sends burner hearth back to after making the heat ash separated to participate in circulating combustion, and be independent parts of boiler.Separator has louvre type, guide type, cyclone separating or the like.Separator is many builds moulding by laying bricks or stones with refractory brick, builds furnace wall by laying bricks or stones and easily collapse under high-temperature condition, exist fragile, the phenomenon that the cycle of operation is short, and it is lower to exist separative efficiency, under the condition of high temperature, the supporting construction difficult arrangement, problem such as can't maximize.

The purpose of this utility model has provided a kind of with water-cooling pattern, adopts the higher worm frame of separative efficiency, can be used for duty at the water-cooled scroll casing type boiler cyclone separator that uses below 950 ℃.

The purpose of this utility model is achieved in that accompanying drawings is as follows:

A kind of boiler cyclone separator, its design feature is:

1. its integral body of separator is vertical cylindrical shell, forms upper and lower being connected to one by the tubular dipleg 1 and whirlwind housing 2 two parts on top of bottom;

2. water inlet 1-4 is established in the lower end in dipleg 1 outer wall, and the upper end sets out mouth of a river 2-4 in whirlwind housing 2 outer walls;

3. establish inlet 2-6 on top whirlwind housing 2 sidewalls, its cross section is a scroll casing shape.

Accompanying drawing 1 is boiler cyclone separator structure cut-away view

Accompanying drawing 2 is boiler cyclone separator spiral case cut-away view

Description of drawings and embodiment: can find out by accompanying drawing 1, whole separator is made up of two parts, and top is whirlwind housing 2, and the bottom is a dipleg 1, be fixed together by horizontal annular header 1-3 between whirlwind housing 2 lower port and dipleg 1 upper port, support force is strong; As shown in Figure 2, establish inlet 2-6 on whirlwind housing 2 sidewalls, be communicated with furnace outlet,, its cross section such as scroll casing shape are realized the effect of cyclonic separation.

Can find out by accompanying drawing 1,2, in order to make the separator outer wall keep support force and cooling, outer wall be to weld the steel outer wall that surrounds side by side by many vertical tubule 1-6, the lower port of every bottom tubule 1-6 is water inlet 1-4, the upper port of every top tubule 1-6 is delivery port 2-4; Because the upper and lower internal diameter difference of separator outer wall, reach the abundant cooling effect of whole outer wall, it is many that the tubule 1-6 number of establishing on the big outer wall of bore is wanted, so be provided with annular header through changing bigger position interior, as whirlwind housing 2 lower port in the accompanying drawing 1 and dipleg 1 upper port junction, weld horizontal intermediate annular collection case 1-3; , set the annular header 1-1 of portion in dipleg 1 lower port; Establish upper, annular collection case 2-2 at whirlwind housing 2 upper port places, every tubule 1-6 upper/lower terminal mouth is connected with the annular header that joins respectively; Annular header laterally is located on the outer wall, the upper port of every tubule 1-6 below the collection case is welded with the annular header lower wall and is communicated with, the every tubule 1-6 lower port on annular header top is welded with the annular header upper wall and is communicated with, so its outer wall is the tubule 1-6 radical difference of different parts up and down, but cooling water can be entered by the water inlet 1-4 of lower end, through behind the annular header, enter top tubule again, flow out by top delivery port 2-4 at last, both realized that whole outer wall cools off to greatest extent, had guaranteed the support function of cyclone separator again.

In order to strengthen the support strength of separator outer wall, establish abrasion-proof concrete layer 1-7 from top to bottom in the outer wall inboard that tubule 1-6 forms, establish adiabator layer 1-8 in its whole outer exterior wall, establish steel backplate 1-9 in adiabator layer 1-8 outside.The separator inner chamber is communicated with up and down.

This separator designs is ingenious, but processing technology and uncomplicated, the machining technique personnel can finish, and for easy to make, inlet 2-6 bottom is spiral case pipe 2-1, and dipleg 1 hypomere is dipleg pipe 1-2.

Bottom dipleg outlet 1-5 is communicated with the boiler material returning device, and the top flue gas is flown out by outlet 2-5, is found out that by above-mentioned the utility model cyclone separator and boiler have been formed a circulatory system.

Working condition: the high temperature cigarette ash gas that boiler produces enters separator inlet 2-6 by furnace outlet, and under the effect of cyclonic separation, dust descends and enters boiler material returning device 1-10 by bottom dipleg outlet 1-5; Flue gas after the separation flies out through top exhanst gas outlet 2-5; Just opening water valve before high temperature cigarette ash gas will enter separator inlet 2-6 injects the bottom mouth of a river 1-4 of cold water by every tubule 1-6, flow out by top delivery port 2-4 again, to guarantee the separation of separator and high temperature cigarette ash gas ash, gas under the condition of cooling.

Advantage of the present utility model has clearly realized purpose of design cmpletely. Owing to comprehensively adopted Cooling water temperature, wear-resisting refractory material and the volute type structure of water-cooled steel skeleton cast have guaranteed branch Stability under the device high temperature has been avoided easily the collapsing of old device, damage and short phenomenon of the cycle of operation, Guaranteed the stability of boiler long-term safety operation, and made separative efficiency bring up to 98% by original 88% More than, make boiler combustion efficiency improve 5-1O percentage point, obviously energy-saving and cost-reducing, and boiler is produced Product maximize, and this separator can be used in the CFBB of the various parameters of 35t/h-670t/h, For CFBB provides technology dependence to large scale development.

Claims

1, a kind of boiler cyclone separator is characterized in that:

2, boiler cyclone separator according to claim 1, it is characterized in that: the outer wall of separator is welded side by side by many vertical tubule 1-6 and surrounds, the lower port of every bottom tubule 1-6 is water inlet 1-4, and the upper port of every top tubule 1-6 is delivery port 2-4.

3, boiler cyclone separator according to claim 1, it is characterized in that: whirlwind housing 2 lower port and dipleg 1 upper port junction, weld horizontal intermediate annular collection case 1-3, set the annular header 1-1 of portion in dipleg 1 lower port, establish upper, annular collection case 2-2 at whirlwind housing 2 upper port places, every tubule 1-6 upper/lower terminal mouth is connected with the collection case that joins respectively.

4, boiler cyclone separator according to claim 1 is characterized in that: the outer wall inboard that tubule 1-6 forms is established abrasion-proof concrete layer 1-7 from top to bottom, establishes adiabator layer 1-8 in its whole outer exterior wall.

5, boiler cyclone separator according to claim 4 is characterized in that: establish steel backplate 1-9 in adiabator layer 1-8 outside.