CN2454376Y - Nozzle protection cover for gas time-roasting vertical Riln - Google Patents

Abstract

The utility model relates to a protective sleeve of a gas burner for an activated lime vertical kiln which uses gas as fuel. The protective sleeve is an integral prefabricated part, and the size of the inner surface corresponds to the size of the appearance of a burner. The appearance of the protective sleeve forms a sector table shape. The inner edge of the top of the protective sleeve is extended out of the inner edge of the bottom, and the cross section of the protective sleeve is inversely trapezoidal. Both side surfaces of the protective sleeve are perpendicular to the top surface and the bottom surface, and the side surfaces are rectangular. The protective sleeve with the structure can tightly sealed with the burner and furnace wall bricks. The masonry is convenient, and the burner can be protected. The utility model avoids that working linings are all changed because the burner is damaged, and the production is delayed to bring economic loss.

Description

Gas combusting limestone kiln burns chews protective sleeve

It is that the active lime shaft kiln of fuel burns and to chew protective sleeve with gas that the utility model relates to a kind of.

With gas (especially blast furnace gas) is the active lime shaft kiln of fuel, reasonable with its less investment, construction period weak point, good product quality, energy structure, working cost low and plurality of advantages such as reliable easy and simple to handle and being adopted by domestic increasing middle-size and small-size iron and steel enterprise.One of this kiln subject matter in operational process is that burning is chewed and protective sleeve very easily damages.Domestic gas burning kiln almost adopts traditional garden tubbiness high temperature steel cover to chew the shower nozzle protective sleeve as burning bar none; the refractory concrete ramming is adopted in the slit of protective sleeve and furnace wall; the big-difference of crossing owing to the performance of expanding with heat and contract with cold between steel bushing and refractory materials; protective sleeve and peripheral refractory materials produce very big thermal stresses in the use; make the very fast damage of peripheral refractory materials; the anti-material of periphery damages afterfire flame and just directly acts on protective sleeve, makes progressively scaling loss of protective sleeve distortion and quilt very soon.Once protective sleeve damages, then burn and chew the mechanical wear that will be subjected to material in the kiln and intensive mechanical shock and damage, burn that to chew the mixed effect that damages back air and coal gas not good, cause the deterioration of limestone kiln thermal regulation.General this burning chew and protective sleeve promptly badly damaged after coming into operation one month, this just illustrates that this protective sleeve can not play protection well and burn the effect chew, this is the ubiquitous difficult problem of gas combusting limestone kiln.

The purpose of this utility model provides a kind of gas combusting limestone kiln burning of can protecting well and chews, and conveniently build by laying bricks or stones, and the burning that can make flame concentrate on the kiln heart is chewed protective sleeve.

For achieving the above object; the technical scheme that is adopted is: protective sleeve is integral prefabricated; it is corresponding that internal surface size and burning are chewed physical dimension; profile is the fan-shaped platform shape; along stretching out than the bottom inner edge, it stretches out the cross section for trapezoidal in the top, and the protective sleeve two sides are vertical with top plan and base plane; be shaped as rectangle, the protective sleeve material adopts Heat stability is good, intensity height, erosion resistant refractory castable.Protective sleeve structure such as Fig. 1 are to shown in Figure 2.

The burning that adopts this method to make is chewed protective sleeve; because of its physical dimension corresponding with the furnace wall brick; it is consistent that internal surface and burning are chewed physical dimension; when building by laying bricks or stones; protective sleeve and furnace wall; it is seamless between burning is chewed; conveniently build by laying bricks or stones; and burn and chew the refractory materials making that protective sleeve is used excellent property instead; it expands with heat and contract with cold performance and peripheral material much at one; can not cause furnace wall between protective sleeve and the peripheral furnace wall because of producing excessive thermal stress; protective sleeve damages; chew thereby can well protect to burn, also having avoided chewing damage because of burning needs to change peripheral working lining and delay and produce the financial loss that causes totally, and trapezoidal projection is fallen at the protective sleeve top; can prevent to burn to chew and be subjected to the furnace charge impact; and can make burning chew flame and concentrate on the kiln heart, stablize the thermal regulation of lime shaft kiln, make kiln discharge constant product quality and good.

Elaborate below in conjunction with the implementation process of accompanying drawing to the invention:

Fig. 1: burn and chew the protective sleeve vertical view

Fig. 2: Fig. 1 is along the sectional view of A-A line

Fig. 3: furnace wall brick structures vertical view

Fig. 4: furnace wall brick structures front view

Fig. 5: the design sketch that protective sleeve and furnace wall are brick after building

Referring to figs. 1 through Fig. 5; kiln evenly is divided into some along the transverse section; the block number is that same row burns 2 times that chew number; general gas burning kiln all has two rows (also having single) burning to chew; 10 of every rows; be about to the kiln section and evenly be divided into 20 with 18 ° of angles, as shown in Figure 5, furnace wall brick 1 is identical with protective sleeve 2 sizes.Chew the brick profile by working lining furnace wall masonry size and burning, draw out the structure of two kinds of masonries, shown in Fig. 1-4, and press the good steel mould of structure fabrication.The protective sleeve one-piece construction is the fan-shaped platform shape, and along stretching out down trapezoidal eaves than bottom 4, internal surface size and burning chew that the outside surface size is corresponding in the top 3, and two sides are vertical with top and base plane, are shaped as rectangle, and structure is shown in Fig. 1-2; The furnace wall masonry structure is the fan-shaped platform shape, and two sides are vertical with top and base plane, and size is consistent with the protective sleeve respective face, and structure as shown in Figure 3-4; Select protective sleeve master material, the performance characteristics at position is chewed in klining according to lime, selects good thermal shock stability, intensity height, erosion resistant self drainage mullite mould material for use.Utilize the mould of before having made, adopt vibrating head vibratory compaction, be made into prefabricated component, seasoning changed in the tunnel drying kiln after 24 hours, and insulation is 24 hours under 300 ℃ temperature.Note controlling by the heat-up rate of 10 ℃/min.For guaranteeing protective sleeve and burning is chewed and the good driving fit of furnace wall brick, prefabricated component respectively is controlled at below the 1.5mm to tolerance of dimension.When working lining is changed in the limestone kiln overhaul, burning is chewed the position build by laying bricks or stones with the protective sleeve prefabricated section of having made, by the protective sleeve that this structure is built by laying bricks or stones, chew and the good driving fit of furnace wall brick with burning.After laying the protection jacket layer, continue to build by laying bricks or stones remaining working lining, can put into operation behind the intact baking of the overhaul kiln.The burning that comes into operation is chewed protective sleeve; in whole stove labour; need not keep in repair and change; and owing to burn that to chew protective sleeve intact; coal gas and Air mixing effect remain on standard state; stablized the thermal regulation of kiln, made kiln discharge constant product quality and good, avoided simultaneously because of change the financial loss that protective sleeve causes changing peripheral working lining and the processing that stops production brings totally.

Claims (2)

1, a kind of lime shaft kiln burns and chews protective sleeve; it is characterized by: protective sleeve is whole fan-shaped platform shape prefabricated component; it is corresponding that internal surface size and burning are chewed physical dimension; stretch out than the bottom inner edge on the edge in the top; its cross section is for trapezoidal, and trapezoidal hypotenuse and base are in an acute angle, and the protective sleeve two sides are vertical with top plan and base plane; be shaped as rectangle, the protective sleeve material adopts Heat stability is good, intensity height, erosion resistant refractory castable.

2, burning as claimed in claim 1 is chewed protective sleeve, it is characterized by: the protective sleeve material selects for use the self drainage mullite to make mould material.

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