CN2310301Y

CN2310301Y - Inner tube for cyclone preheater

Info

Publication number: CN2310301Y
Application number: CN 97226896
Authority: CN
Inventors: 邓京林
Original assignee: LONGTAN HEAVY MACHINERY FACTORY SHUANGLONG GROUP CO Ltd JIANGSU PROV
Current assignee: LONGTAN HEAVY MACHINERY FACTORY SHUANGLONG GROUP CO Ltd JIANGSU PROV
Priority date: 1997-09-14
Filing date: 1997-09-14
Publication date: 1999-03-10
Anticipated expiration: 2007-09-14

Abstract

The utility model provides an inner barrel of a cyclone preheater, which is used at the tail part of a kiln in a cement dry process burning system. The inner cylinder of a cyclone preheater is composed of a plurality of equal parts. The dimension and the size of each of the equal parts are proper so that the equal parts can pass through an overhaul manhole. The equal parts are connected through bolts. The inner and the outer surfaces of the inner barrel are coated by fireproof casting materials. When an original inner barrel of the preheater is replaced with the inner barrel in the structure, the service life of the preheater can be obviously prolonged. Therefore, the running rate of a kiln system is increased.

Description

A kind of inner core for the cyclone preheater use

Cyclone preheater belongs to the raw material preheating device in the middle of the dry cement production line.Usually every grade of whirlwind tube central authorities of cyclone preheater are equipped with inner core, and the effect of inner core mainly is the separative efficiency that improves material and air-flow, thereby the material that reduces preheating carries out unnecessary circulation between whirlwind tubes at different levels, reach energy saving purposes.The utility model is the improvement to former inner tube structure.

At present, the structure of inner core mainly contains two kinds of forms, i.e. integral solder form and burst suspension type.There is transportation in the former and changes the shortcoming of inconvenience, though the latter is convenient to transportation and is changed, exists structural stability poor, has big slit between every, and separative efficiency is had dysgenic shortcoming.Except that above-mentioned shortcoming separately, both also have a common deficiency, and it is all shorter that is exactly service life.The deficiency of lacking general service life 1 year, long two, three years only.Especially for use in the inner core of bottom two stage cyclone tube and since operating temperature up to 1000 ℃ about, although adopted the expensive heat-resisting steel material of trade mark 2Cr25Ni20Si2, still be difficult to prolong its service life significantly.

The purpose of this utility model provides a kind of inner core, and it is long service life not only, and is convenient to change having damaged inner core in the former preheater.

The purpose of this utility model is achieved in that inner core along the circumferential direction is divided into 10～16 pieces such as grade that every block specifications size is being advisable by inspection manhole.Every inside and outside wall direction in length and breadth all has gusset, and the two sides gusset has some confessions and wears the hole that bolt is used, and the holdfast of can burn-oning in advance in the sash that gusset is formed in length and breadth uses for firm castable refractory.Every piece that waits is sent in the whirlwind tube that needs the replacing inner core from inspection manhole one by one, adopts bolt, nut that it is combined into integral body on former inner core position, and is fixed.All pour into a mould in all sashes on the inside and outside wall of fixing back with castable refractory.

Owing to adopt technique scheme, both be convenient to realize former preheater has been damaged the replacing of inner core, and the inner core of changing will obtain significant prolongation service life.Its manufacturing cost and former inner core are very nearly the same, but the life-span has been improved 2～3 times.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the schematic diagram of an embodiment of the utility model;

Fig. 2 is the vertical view of Fig. 1.

In Fig. 1, example shown in Figure 2, inner core mainly is made of 1,36 bolts 2 of 12 identical inner core sheets and part castable refractory 4.The sash of all forming on the inside and outside wall of each inner core sheet by gusset, can be in each sash by the holdfast 3 of burn-oning about spacing 200mm, then its block-by-block is sent into the whirlwind tube from the maintenance hand-hole, in the whirlwind tube, adopt bolt 2 to connect into integral body, and be fixed on the correct position, fill up castable refractory in the sash with the inner core inside and outside wall at last.

The material of inner core sheet 1 can adopt the trade mark in being used for top two stage cyclone tube be the carbon structural steel of Q235-A, is used for must selecting heat resisting steel for use in the whirlwind tubes at different levels of bottom.Heat resisting steel can use foundry goods, also can use the steel plate weldment.Present embodiment is taked the latter.Watering material feeding optional is the alkali-resistant refractory castable of 12D with model.

Claims

1. inner core that is used for cyclone preheater, it is made up of polylith, and every all can is characterized in that by the maintenance hand-hole: adopt Bolt Connection to become integral body between every.

2. inner core according to claim 1 is characterized in that: the inside and outside wall of inner core is divided into some sashes by gusset, is welded with holdfast in each sash, and fills up castable refractory.