JPS594025Y2 - Cooling device for high temperature powder and granular materials - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooling device for high-temperature powder and granular material that air-cools high-temperature cement clinker or the like from a rotary kiln.

Conventional grate-type coolers that cool high-temperature cement clinker from rotary kilns have a rapid cooling effect, but as they become larger, the distribution of clinker supplied from the rotary kilns becomes uneven, resulting in blow-through and However, this cooler's unique spring temperature caused overheating of the grate and delayed cooling, which had the disadvantage of interfering with long-term continuous operation.

The present invention includes a primary cooler that forms an upper fluidized bed and a lower transparent layer following this, and a grate-type secondary cooler following this, and clinker from a rotary kiln is introduced into the secondary cooler. This system solves the above-mentioned drawbacks of the grate type cooler by separating and cooling mainly large-grained clinker and supplying powdered and small-grained clinker overflowing from the upper fluidized bed to the subsequent secondary cooler. , one embodiment thereof will be described with reference to the drawings.

In the drawings, 1 is a rotary kiln, and 2 is a kiln burner.

Further, 3 is a primary cooler, which introduces high temperature clinker from the rotary kiln 1 to form an upper fluidized bed 4 and a lower transparent layer 5 continuous thereto.

The primary cooler 3 is provided with a crusher 6, a rotary discharger 7, a blower 8, and the like.

Further, 9 is a grate type secondary cooler, and 10 is a control board.

In the cooling device for high-temperature powder and granular material configured in this way, first, the high-temperature clinker from the rotary kiln 1 is supplied to the primary cooler 3, and the air sent from the blower 8 is used to cool the upper fluidized bed 4 and the lower optical fiber. forming layer 5 and cooling;
Among them, the large clinker is separated and descends to the crusher 6.
It is crushed and pulled out from the rotary discharger 7.

Powdered and small clinker overflowing from the upper fluidized bed 4 is introduced into a grate-type secondary cooler 9 and cooled like a known grate-type cooler.

Note that the cooler exhaust gas is supplied from the cooler as combustion air to a calciner (not shown) or the like, as shown by an arrow 11.

Here, the amount of clinker taken out from the primary cooler 3 is small because it is only necessary to take out large chunks or large grains.

The amount of air in the blower 8 is set to be enough to cool the clinker to within the heat resistance limits of the crusher 6 and the rotary discharger 7, and the diameter of the cylindrical portion of the cooler 3 that forms the upper fluidized bed 4 is set to the size that allows the particles to be classified to be The diameter, that is, the particle size of the clinker overflowing to the secondary cooler 9 is determined from the flow initiation speed and the above-mentioned air amount.

The amount of clinker drawn from the secondary cooler 9 is the amount obtained by subtracting the amount of clinker drawn from the primary cooler 3 from the total burnout amount, and the grate air amount of the secondary cooler 9 is the amount required by the primary cooler 3 from the total required air amount. It is assumed that .

As mentioned above, the present invention combines a primary cooler that forms an upper fluidized bed and a lower porosity layer with a grate-type secondary cooler, and the primary cooler mainly separates and cools large clinker, while the secondary cooler Since powder and small clinker overflowing from the upper fluidized bed of the primary cooler is introduced for cooling, the advantages of the grate type cooler can be utilized as is, while the disadvantages of overheating and cooling of the grate due to segregation and overheating and cooling of the grate are maintained. Delays etc. will be eliminated.

[Brief explanation of drawings]

The drawing is an elevational view, partially cut away, showing an embodiment of the present invention. 1...Rotary kiln, 2...Kiln burner, 3...Primary cooler, 4...Upper fluidized bed, 5...Lower light cell Layer, 6...
・Crusher, 7...Rotary discharge machine, 8...
...Blower, 9...Secondary cooler.

Claims (1)

[Scope of utility model registration request] A primary cooler introduces high-temperature clinker from a rotary kiln to form an upper fluidized bed and a lower porosity layer continuous to this to separate and cool mainly large clinker, and a primary cooler that separates and cools mainly large clinker, and a A cooling device for high-temperature powder and granular materials, which is equipped with a grate-type secondary cooler that introduces clinker for cooling.