CN216890677U

CN216890677U - Sealing device for preventing cracking of welding seam of lime kiln discharge ash bucket

Info

Publication number: CN216890677U
Application number: CN202220701492.7U
Authority: CN
Inventors: 李磊; 黄升; 唐文华; 于海; 马琨琨; 张领; 杨俊杰; 韦炳扬; 黄尚凌; 陈小勇
Original assignee: Guangxi Liugang New Material Technology Co ltd
Current assignee: Guangxi Liugang New Material Technology Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-05
Anticipated expiration: 2032-03-29

Abstract

The utility model discloses a sealing device for preventing cracking of a welding seam of a lime kiln discharging ash bucket, which comprises a refractory brick, concrete, a steel foundation base plate, a conical hopper and an ash discharge flat plate, wherein the refractory brick, the concrete, the steel foundation base plate, the conical hopper and the ash discharge flat plate are arranged on the inner side of a kiln shell, a circle of arc-shaped steel plate is welded between a top enclosing plate of the conical hopper and the steel foundation base plate, a rib plate is welded at an included angle between the inner side of the arc-shaped steel plate and the steel foundation base plate, anchoring parts are uniformly welded on the inner sides of the arc-shaped steel plate and the rib plate, a round steel bar is welded between the arc-shaped steel plate and the top enclosing plate of the conical hopper, and the inner side of the arc-shaped steel plate, which is positioned above the round steel bar, is filled with a refractory castable refractory material to a position below the steel foundation base plate. The utility model can solve the problem that the welding seam of the discharging ash bucket of the existing Mailzier kiln is directly exposed in the finished lime material to cause the cracking of the welding seam.

Description

Sealing device for preventing cracking of welding seam of lime kiln discharge ash bucket

Technical Field

The utility model relates to the technical field of steel manufacturing and equipment thereof, in particular to a sealing device for preventing cracking of a welding seam of a discharging ash bucket of a Maerz kiln.

Background

The double-hearth kiln has two hearths, one hearth stores heat while the other hearth carries out calcination. Reversing once every 14 minutes, wherein a hydraulic valve acts during reversing to release kiln pressure, and simultaneously, the position of a gate plate is changed to realize the conversion between a calcining chamber and a heat storage chamber. In the calcining chamber, coal gas was pressurized by a pressurizing machine, fed from 33 lances to the calcining chamber, and mixed with combustion-supporting air introduced from the upper part of the kiln to be combusted. The flue gas generated by calcination flows to the heat storage chamber through the annular channel and the middle channel, flows upwards under the action of cooling air from bottom to top, stores heat of stones which are just added into the heat storage chamber, and enters the flue gas dust remover after the temperature is reduced. Every cycle the system feeds in raw material three times to the heat accumulation thorax, and when kiln section of thick bamboo was closed the apron and is opened at every turn, for avoiding the raise dust, the system can promote dust exhausting fan rotational speed. In order to ensure the stable material level, the finished product produced by calcination is accurately measured by a material level meter, the hydraulic cylinder pushes the ash discharging platform, and the lime blocks on the upper part of the ash discharging platform in the kiln fall into a small storage bin at the bottom of the kiln from the edge. During the reversing period, the discharging flashboard is opened, and the finished product can enter a finished product production line.

A general Maerz kiln discharge ash bucket structure is shown in figures 1 and 2 and comprises a refractory brick 2 arranged on the inner side of a kiln shell 1, L-shaped concrete 7 is arranged below the refractory brick 2 and on the outer side of the kiln shell 1, a steel foundation backing plate 3 is arranged between the horizontal position of the concrete 7 and the refractory brick 2, a conical hopper 5 is arranged below the steel foundation backing plate 3, an ash discharge flat plate 6 is arranged at the bottom of the conical hopper 5, and the steel foundation backing plate 3 is attached to the concrete 3 and supports the refractory bricks 2 of a double-hearth kiln. In the design of partial double-hearth kiln, the steel base backing plate 3 and the coaming of the conical hopper 5 are welded, so that the welding seam surface is exposed and the welding seam is contacted with the lime finished product material. Because the sizes of the finished lime particles are different, the temperature difference of the finished lime is easy to appear after calcination. The temperature of materials borne by the welding line of the coaming of the ash bucket is different, and finally the materials crack under the action of thermal stress to generate air leakage.

And the ash discharging bucket of the ash discharging platform is positioned in a concrete supporting structure of a 15-meter platform of the Mailz kiln, the position is narrow, welding cannot be carried out outside the kiln body at all, and after materials of the kiln are discharged, personnel enter the inside of the kiln to be treated. This work greatly affects the normal production of the kiln.

Disclosure of Invention

The utility model aims to solve the problem of welding seam cracking caused by directly exposing the welding seam of the discharging ash bucket of the existing Mailz kiln to a lime finished product material.

In order to solve the problems, the technical scheme of the utility model is as follows: this sealing device of prevention lime kiln ejection of compact ash bucket welding seam fracture includes that the inboard resistant firebrick, concrete, steel basis backing plate, toper hopper, the ash of setting of kiln shell are dull and stereotyped, the top bounding wall of toper hopper with it has a week arc steel sheet to weld between the steel basis backing plate, arc steel sheet inboard with contained angle department welding between the steel basis backing plate has the gusset, arc steel sheet with the inboard even welding of gusset has anchoring member, arc steel sheet with a round steel has been welded to a week between the top bounding wall of toper hopper, arc steel sheet inboard in go up in the round steel extremely position under the steel basis backing plate is filled through refractory castable.

In the above technical solution, a more specific solution may be: the rib plates are triangular rib plates with triangular longitudinal sections.

Further: the diameter of the round steel is 10 mm.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

this sealing device of prevention lime kiln ejection of compact ash bucket welding seam fracture adopts and amputates original play ash toper hopper upper portion to pass through round steel welding arc steel sheet, weld the rib between arc steel sheet inboard and steel foundation backing plate and strengthen the support dynamics, reuse anchor assembly consolidates, pour with refractory castable at last, it is wrapped up by the castable to have realized a grey toper hopper steel construction welding seam, avoided the welding seam to be washed away by lime only finished product material, prevent the fracture of welding seam, the effectual leakproofness of guaranteeing the toper hopper simultaneously.

Drawings

FIG. 1 is a front view of the prior art;

FIG. 2 is a top view of the prior art;

FIG. 3 is a front view of an embodiment of the present invention;

fig. 4 is an enlarged view of fig. 3 at a.

Detailed Description

The embodiments of the utility model will be described in further detail with reference to the accompanying drawings:

the sealing device for preventing the cracking of the welding seam of the lime kiln discharging ash bucket comprises a refractory brick 2 arranged on the inner side of a kiln shell 1, concrete 7 in an L shape is arranged below the refractory brick 2 and on the outer side of the kiln shell 1, a steel foundation backing plate 3 is arranged between the horizontal position of the concrete 7 and the refractory brick 2, a conical hopper 5 is arranged below the steel foundation backing plate 3, an ash discharging flat plate 6 is arranged at the bottom of the conical hopper 5, the steel foundation backing plate 3 is attached to the concrete 3, and the refractory brick 2 of the double-hearth kiln is supported.

The top bounding wall height of toper hopper 5 here is prior art's toper hopper bounding wall height low, the welding has a week arc steel sheet 9 between the top bounding wall of toper hopper 5 and steel foundation backing plate 3, the contained angle department welding between arc steel sheet 9 inboard and steel foundation backing plate 3 has the gusset, gusset here is triangle-shaped's triangle gusset 8 for the longitudinal section, arc steel sheet 9 has anchor assembly 10 with triangle-shaped gusset 8's inboard even welding, a week welding has a round steel 12 between arc steel sheet 9 and the top bounding wall of toper hopper 5, arc steel sheet 9 is inboard to the position under steel foundation backing plate 3 on the round steel 12, fill through refractory castable 11.

The specific sealing construction method comprises the following steps:

A. and emptying the lime finished product material in the kiln shell 1.

B. And opening the observation manhole in the kiln, erecting an axial flow fan on part of the manhole to draw air, and enhancing air circulation.

C. Erecting a movable scaffold: a movable scaffold operation point area is erected above the unloading platform, and bamboo pedals are sequentially placed at the top of the scaffold, so that ash falling or falling of the kiln wall is prevented from injuring constructors.

D. Cleaning the ash discharging flat plate 6 and the inner surface of the conical hopper 5.

E. Cutting off the upper part of the conical hopper 5: the coaming at the top of the conical hopper is cut for a circle along the arc direction with the width of 450mm vertically downward 350-.

F. Installing and welding a radian steel plate 9: sequentially installing and welding the arc-shaped steel plate 9 on the top of the conical hopper 5, and performing sectional welding to ensure that the distance between the welding surface of the arc-shaped steel plate 9 and the bottom surface of the top of the conical hopper 5 and the outer edge of the refractory brick steel base cushion plate 3 on the top of the conical hopper 5 is 40-60 mm; the edges of the conical hopper 5 and the radian steel plate 9 are required to be beveled by a cutting machine, the plate thickness of the radian steel plate 9 is 10-12mm, the depth of the bevel is 6mm, the angle is 45 degrees, full-length welding is carried out, and the welding line is qualified after flaw detection.

G. A circle of triangular rib plates 8 are welded along the included angle between the inner side of the top of the conical hopper 5 and the steel foundation backing plate 3, the triangular rib plates are steel plates with the thickness of 10-15mm, the distance between the triangular rib plates is not more than 200mm, and full welding is ensured; and welding a circle of round steel with the diameter of 10mm at the welding seam at the bottom of the arc-shaped steel plate 9 along the welding seam at the top of the whole conical hopper.

H. Anchoring parts 10 are uniformly welded on the inner sides of the arc-shaped steel plate 9 and the triangular rib plate 8, a template is built between the arc-shaped steel plate 9 and the round steel 12 to the steel foundation backing plate 3, a refractory castable is used for pouring and filling, and a vibrating rod is used for vibrating and beating uniformly; and after the casting material is sufficiently hardened, removing the refractory casting material template after 24 hours, and finishing construction.

Compare former kiln structure, this structure better realization go out 5 steel construction welding seams of grey toper hopper and move inwards, the gusset reinforcement has protected the welding seam, and the welding seam of the radian steel sheet of toper hopper 5 is wrapped up by the pouring material, has avoided the welding seam to be washed away by the building stones, can stand the erosion of material high temperature, the effectual leakproofness of having guaranteed the hopper.

Claims

1. The utility model provides a sealing device of prevention lime kiln ejection of compact ash bucket welding seam fracture, is dull and stereotyped including the resistant firebrick, concrete, steel basis backing plate, toper hopper, the play ash that the kiln shell inboard set up, its characterized in that: the top bounding wall of toper hopper with the welding has a week arc steel sheet between the base of steel backing plate, the arc steel sheet inboard with the contained angle department welding between the base of steel backing plate has the gusset, the arc steel sheet with the inboard even welding of gusset has anchoring member, the arc steel sheet with a week welding has a round steel between the top bounding wall of toper hopper, the arc steel sheet inboard in on the round steel extremely position under the base of steel backing plate is filled through refractory castable.

2. The sealing device for preventing the cracking of the welding seam of the lime kiln discharging ash bucket according to claim 1, which is characterized in that: the rib plates are triangular rib plates with triangular longitudinal sections.

3. The sealing device for preventing the cracking of the welding seam of the lime kiln discharging ash bucket according to claim 1 or 2, which is characterized in that: the diameter of the round steel is 10 mm.