CN1110680C

CN1110680C - Furnace for expanding perlite

Info

Publication number: CN1110680C
Application number: CN 99112129
Authority: CN
Inventors: 黄官禹
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-25
Filing date: 1999-03-25
Publication date: 2003-06-04
Anticipated expiration: 2019-03-25
Also published as: CN1234378A

Abstract

The present invention relates to a furnace for expanding perlite, which is an improvement on an existent vertical furnace. The furnace for expanding perlite is additively provided with an auxiliary furnace cavity on the side of the main furnace cavity positioned at the upper side of the combustion chamber; the upper hole of the main furnace cavity is connected with the inlet of the auxiliary furnace cavity on the upper side surface; the auxiliary furnace cavity is provided with a funnel-shaped double-layer water-cooling material-receiving hopper at the lower side. The sand granules of the perlite non-expanded in the main furnace cavity can be completely expanded in the auxiliary furnace cavity, and thus, the furnace can produce large granular material. The furnace of the present invention can raise production output and product quality, reduce production cost and greatly raise the economic benefit.

Description

A kind of furnace for expanding perlite

The invention belongs to the vertical heater technical field, particularly relate to a kind of vertical furnace for expanding perlite that the perlite sand grains expands that is used for.

Perlitic expansion principle, be that the perlite sand grains after baking was reburned in the high temperature furnace about 1250 ℃ about 3 seconds, particle after the partially crystallizable instant water gasification that utilizes perlite sand grains heart to remain will be softened expands, and forms the foam-like light granules that the whole body has micropore.Be that the perlite expansion must possess two conditions, the one, temperature must reach 1250 ℃ in the stove, and the 2nd, particle must be about 3 seconds at residing time in furnace.And existing furnace for expanding perlite, the particularly the most frequently used funnel-shaped upright stove of half that is called as, its structure only is made of a combustion chamber and a straight tube burner hearth, and the burner hearth upper end connects double-deck water cooling tube, and the material grain after the expansion enters separator by it.The patent No. is that 97209213 " vertical furnace for expanding perlite " is exactly this structural shape.The furnace height of this expansion furnace can not make the perlite sand grains stay for 3 seconds in the high-temperature region, thereby can not get fully expanding just having been moved in the water cooling tube by air inducing.But furnace height can not be increased again, because burner hearth is crossed the freezing of a furnace that the higher position occurs in can't process for producing, influences ordinary production.On the other hand, though can prolong the time of staying of pearl rock sand in burner hearth if turn down air inducing, air inducing is little and can cause combustion chamber oxygen supply deficiency, makes fire box temperature not reach 1250 ℃ expansion temperature, cause the generation of blanking phenomenon, influence ordinary production equally.In sum, existing furnace for expanding perlite energy consumption height, production efficiency is low, and the expanded perlite granule of producing is little, and unit weight is big, is greatly restricting the raising of business economic benefit.

The purpose of this invention is to provide a kind of furnace for expanding perlite that promptly can enhance productivity and can improve the quality of products, thereby improve economic benefit of enterprises greatly.

For achieving the above object, the present invention is by the following technical solutions: it comprises the combustion chamber and is positioned at main furnace chamber above the combustion chamber, its design feature is in main furnace chamber one side a secondary-furnace to be installed also, the outlet of main furnace chamber upper end is connected with the population of secondary-furnace top one side, and the secondary-furnace lower end is equipped with a funnelform double-deck water-cooled receiving hopper.

Compare with existing vertical furnace for expanding perlite, the present invention has following tangible advantage: the one, install secondary-furnace additional after, fuel has had combustion space and burning time more fully, fuel combustion is abundant, promptly guaranteed the expansion temperature of burner hearth, reduce energy consumption again, and solved the environmental pollution that original discharging black smoke causes; The 2nd, install secondary-furnace additional after, in main furnace chamber, can not get expanding or the incomplete pearl sand that expands, entering secondary-furnace is continued to expand, prolonged the time of perlite in the high-temperature region, make it obtain expanding completely, thereby can produce the bulky grain expanded perlite, and improved product quality greatly, reduced production cost.After measured, the average unit weight of the expanded perlite that produces be 58kg/m ³The 3rd, install secondary-furnace additional after, can strengthen air inducing, increase oxygen-supplying amount, throw raw material, thereby output can be enhanced about more than once more.

Fig. 1 is a positive view of the present invention;

Fig. 2 is the positive view of the used coal burner of the present invention.

The embodiment that Fig. 1 provides is the improvement to existing furnace for expanding perlite, and it has combustion chamber 1 and the straight tube main furnace chamber 2 that is positioned at above the combustion chamber 1 equally, and burner is housed in the combustion chamber, and the main furnace chamber bottom has the feed opening 7 of throwing in raw material.Side at main furnace chamber 2 also is equipped with a secondary-furnace 8, and the secondary-furnace inner chamber is up big and down small, and the top can be arch.Suitable for reading and the secondary-furnace 8 upper side inlet of main furnace chamber 2 is connected.For preventing that secondary-furnace 8 bottoms from producing freezing of a furnace, a funnelform double-deck water-cooled receiving hopper 12 is installed in the lower end of secondary-furnace 8, the support 13 that receiving hopper 12 and secondary-furnace 8 usefulness are stood on ground supports.The chamber wall of combustion chamber 1, main furnace chamber 2 and secondary-furnace 8 all is made of outer field steel plate 11, inboard refractory masses 9 and middle adiabator layer 10.For preventing to produce freezing of a furnace, at the end face of main furnace chamber 2 and secondary-furnace 8 junctions (be main furnace chamber directly over position) double-deck water-cooled cover plate 4 is installed, have a clean-up port that is used to handle main furnace chamber 2 freezings of a furnace on this cover plate 4, seal cover 5 is housed on the clean-up port.The double-deck water-cooled anti-caking plate 6 of an arc also is housed at the main furnace chamber 2 and the downside of secondary-furnace 8 junctions.Above said double-deck water-cooled receiving hopper 12, double-deck water-cooled cover plate 4 and double-deck water-cooled anti-caking plate 6 be welded into by steel plate, its inner chamber passes to the cooling water that circulates in the production process.For preventing secondary-furnace 8 top freezings of a furnace, the height of the double-deck water-cooled cover plate 4 at main furnace chamber 2 tops should be lower than the height at secondary-furnace 8 tops.

In the production, the end opening of receiving hopper 12 can be connected with separator by double-deck water cooling tube, also can open an air-vent in secondary-furnace 8 bottoms one side, and receiving hopper 12 end openings only make to blow the material mouth.

As being fuel with the coal dust, coal burner of the present invention can be installed in the bottom center of combustion chamber 1, and respectively there is a fire door 3 on the forward and backward bilateral symmetry ground of combustion chamber 1.Said coal burner has one and all presses bag 15, all press the bottom center of bag to be connected with the coal dust master for pipe 14, all press the outside, bag 15 bottoms to be evenly equipped with the discharge tube 16 that several (being preferably the 6-8 root) make progress, all press bag end face center that a discharge tube 17 is also arranged, a fuel ignition dish 18 is housed on this discharge tube 17.Adopt such coal burner working condition stable, be convenient to observe and adjust, igniting is easy, and has spray power upwards, and the abundant burning that utilizes coal dust is arranged.

Claims

1, a kind of furnace for expanding perlite, comprise combustion chamber (1) and be positioned at the top main furnace chamber (2) in combustion chamber (1), it is characterized in that: the side at main furnace chamber (2) also is equipped with a secondary-furnace (8), main furnace chamber (2) upper end is connected with the population of secondary-furnace (8) top one side, and the lower end of secondary-furnace (8) is equipped with a funnelform double-deck water-cooled receiving hopper (12).

2, furnace for expanding perlite according to claim 1 is characterized in that the main furnace chamber (2) and the end face of secondary-furnace (8) junction are pair of lamina water-cooled cover plate (4), and this cover plate has a clean-up port on (4), and seal cover (5) is housed on the clean-up port.

3, furnace for expanding perlite according to claim 1 is characterized in that the downside in main furnace chamber (2) and secondary-furnace (8) junction is equipped with the double-deck water-cooled anti-caking plate (6) of an arc.

4, furnace for expanding perlite according to claim 1 is characterized in that the bottom center of in the combustion chamber (1) is equipped with coal burner.

5, furnace for expanding perlite according to claim 4, it is characterized in that said coal burner has one and all presses bag (15), all press the bottom center of bag (15) to be connected with the coal dust master for pipe (14), all press the outside, bag (15) bottom to be evenly equipped with several discharge tubes that make progress (16), all press bag end face center that a discharge tube (17) is also arranged, a fuel ignition dish (18) is housed on this discharge tube (17).