BGL gasification furnace hearth lining structure

Abstract

The utility model discloses a BGL gasification furnace hearth lining structure which comprises a shell, corundum air bricks, corundum refractory bricks and a refractory mortar layer are sequentially arranged on the surface of the inner side of the shell from outside to inside, and refractory castable is filled between the corundum air bricks and the corundum refractory bricks. Ceramic coatings are arranged on the surfaces of the corundum air brick, the corundum refractory brick and the refractory mortar layer; the corundum air brick and the corundum refractory brick are the same in shape, and the end surfaces of the corundum air brick and the corundum refractory brick are Z-shaped; the BGL gasification furnace has the advantages that the corundum air brick and the corundum refractory brick are adopted, and the defect that the temperature of 1500 DEG C or above is generated in the existing BGL gasification furnace is overcome by utilizing the higher heat resistance of the corundum air brick and the corundum refractory brick, so that the phenomena of ablation and corrosion are reduced, the frequency period of replacing the refractory brick is shortened, and the production efficiency is improved; and the end surfaces of the corundum air bricks and the corundum refractory bricks are Z-shaped, so that the contact area between the bricks in the masonry process of the refractory castable is increased, and the stability and the heat resistance of the lining structure are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gasification furnace equipment technical field, concretely is a kind of BGL gasification furnace hearth lining structure. BACKGROUND

[0002] BGL gasification furnace is an advanced liquid slagging gasification technology equipment, and the application of BGL gasification furnace in chemical industry mainly includes coal-to-natural gas, methanol, dimethyl ether, ethylene glycol and raw gas preparation of chemical fertilizer.

[0003] In order to keep the temperature in the furnace and protect the shell, the inner lining structure is usually built on the inner wall surface of the shell of the BGL gasification furnace. The existing inner lining structure is mainly built by silicon carbide combined with silicon nitride refractory brick, corundum refractory brick, silicon carbide ramming material, fire mud and other materials. It can maintain stable structure and performance in high temperature environment, and can withstand temperature up to about 1500 degrees Celsius.

[0004] The existing problem is that during the operation of BGL gasification furnace, it is found that the refractory bricks around the blast port have ablation and corrosion phenomenon, which needs to be immediately stopped for maintenance, and the refractory bricks need to be replaced every few months, and the replacement time is usually 8-9 days, the maintenance time is long, the maintenance cost is high, and the production efficiency is affected.

[0005] After analysis and measurement, it is found that the temperature around the blast port is high because the mixed gas of steam, oxygen and other gases enters the BGL gasification furnace from the blast port, and the measured temperature is above 1500℃, which reaches the upper limit of the heat resistance of the existing inner lining structure, so the refractory bricks around the blast port have ablation and corrosion phenomenon. INVENTION CONTENTS

[0006] The purpose of the utility model is to provide a BGL gasification furnace hearth lining structure to solve the problems raised in the background.

[0007] The utility model is implemented by the following technical solutions:

[0008] A BGL gasification furnace hearth lining structure, comprising a shell, a corundum air brick, a corundum refractory brick and a refractory mud layer are arranged in sequence from outside to inside on the inner side surface of the shell, refractory castable is filled between the corundum air brick and the corundum refractory brick, and ceramic coating is arranged on the surface of the corundum air brick, the corundum refractory brick and the refractory mud layer.

[0009] Preferably, the corundum air brick and the corundum refractory brick are the same shape, the end surface of the corundum air brick and the corundum refractory brick is in the shape of "Z", and a semicircular through hole is vertically arranged at both ends of the corundum air brick and the corundum refractory brick, and refractory castable is filled in the semicircular through hole.

[0010] Preferably, the thickness of the refractory castable is 15-20mm.

[0011] Preferably, the thickness of the refractory castable is 15-20mm.

[0012] The advantages of the utility model are: the corundum air brick and the corundum refractory brick are used to overcome the phenomenon of ablation and corrosion caused by the temperature above 1500 DEG C in the BGL gasification furnace, reduce the frequency period of replacing the refractory brick, improve the production efficiency, the end surface of the corundum air brick and the corundum refractory brick is in the shape of 'Z', increase the contact area between the bricks in the process of building the refractory castable, improve the stability and heat resistance of the lining structure. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the main structure schematic diagram of the utility model;

[0014] Figure 2 It is the structure schematic diagram of the corundum air brick or the corundum refractory brick;

[0015] Figure 3 It is the use state of the corundum air brick or the corundum refractory brick Figure 1 ;

[0016] Figure 4 It is the use state of the corundum air brick or the corundum refractory brick Figure 2 .

[0017] In the drawing: 1, shell, 2, corundum air brick, 3, corundum refractory brick, 4, refractory mortar layer, 5, refractory castable, 6, semicircular through hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Please refer to Figures 1-4 , the utility model provides a kind of BGL gasification furnace hearth lining structure technical scheme:

[0020] The application discloses a BGL gasifier hearth lining structure, which comprises a shell 1, wherein a corundum air brick 2, a corundum refractory brick 3 and a refractory mortar layer 4 are sequentially arranged from outside to inside on the inner side surface of the shell 1; the corundum air brick 2 has good air permeability and can withstand high-temperature environment, and the high-temperature resistance of the corundum air brick 2 can reach 1800 DEG C; the corundum refractory brick 3 has an alumina content of more than 90%, a very high normal-temperature compressive strength (up to 340 MPa) and a high load softening starting temperature (more than 1700 DEG C), and can effectively overcome the phenomenon of ablation and corrosion caused by the temperature of more than 1500 DEG C in the current BGL gasifier, reduce the frequency period of replacing the refractory bricks and improve the production efficiency.

[0021] The corundum air brick 2 and the corundum refractory brick 3 are in the same shape, the end faces of the corundum air brick 2 and the corundum refractory brick 3 are in a 'Z' shape, semicircular through holes 6 are vertically arranged at the two ends of the corundum air brick 2 and the corundum refractory brick 3, and the refractory castable 5 is filled between the corundum air brick 2 and the corundum refractory brick 3, so that the contact area between the bricks in the bricklaying process is increased, and the stability of the lining structure is improved; the thickness of the refractory castable is 15-20 mm, the refractory castable 5 is simultaneously filled in the semicircular through holes 6, so that the corundum air brick 2 and the corundum refractory brick 3 can be firmly bonded together, the integrity and stability of the structure are maintained, and the physical wear of the corundum air brick 2 and the corundum refractory brick 3 is effectively improved; the thickness of the refractory mortar layer 4 is 15-20 mm; ceramic coating is arranged on the surfaces of the corundum air brick 2, the corundum refractory brick 3 and the refractory mortar layer 4, so that the wear resistance of the brick surfaces is further improved, and the service life of the bricks is improved.

[0022] The above merely describes the preferred embodiments of the application, and is not used to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A BGL gasifier hearth lining structure comprising a shell (1), characterised in that: The inner side surface of the shell (1) is sequentially provided with corundum air brick (2), corundum refractory brick (3) and refractory mortar layer (4) from outside to inside, the corundum air brick (2) and the corundum refractory brick (3) are filled with refractory castable (5), and the surfaces of the corundum air brick (2), the corundum refractory brick (3) and the refractory mortar layer (4) are provided with ceramic coating.

2. A BGL gasifier hearth lining structure according to claim 1, characterised in that: The corundum air brick (2) and the corundum refractory brick (3) are the same shape, the end faces of the corundum air brick (2) and the corundum refractory brick (3) are in the shape of "Z", and the two ends of the corundum air brick (2) and the corundum refractory brick (3) are vertically provided with semicircular through holes (6), and the semicircular through holes (6) are filled with refractory castable (5).

3. A BGL gasifier hearth lining structure according to claim 1, characterised in that: The thickness of the refractory castable is 15-20mm.

4. The BGL gasifier hearth lining structure of claim 1, wherein: The thickness of the refractory mortar layer (4) is 15-20mm.

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