CN215712839U - Fire-resistant lining structure of water-coal-slurry pressurized gasification furnace and gasification furnace thereof - Google Patents
Fire-resistant lining structure of water-coal-slurry pressurized gasification furnace and gasification furnace thereof Download PDFInfo
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- CN215712839U CN215712839U CN202120904993.0U CN202120904993U CN215712839U CN 215712839 U CN215712839 U CN 215712839U CN 202120904993 U CN202120904993 U CN 202120904993U CN 215712839 U CN215712839 U CN 215712839U
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Abstract
The utility model discloses a fire-resistant lining structure of a coal water slurry pressurized gasifier and a gasifier thereof, and the coal water slurry pressurized gasifier comprises a steel shell of a furnace body, and a vault stopper opening area, a vault spherical cone fire-resistant area, a vertical furnace wall fire-resistant area, a cone bottom fire-resistant area and a slag opening part which are arranged in the steel shell from top to bottom in sequence, wherein a fire facing layer, a fire-resistant fiber layer, a back lining layer and a heat insulating layer are arranged between the inner wall of the gasifier and the steel shell outside the furnace in sequence in the vertical furnace wall fire-resistant area, and the fire-resistant fiber layer extends into the cone bottom fire-resistant area along the axis of the furnace body. According to the utility model, the fiber compressible material layer is not arranged on the outermost layer of the vertical furnace wall fire-resistant zone, and the layer of fire-resistant fiber is added to the side of the fire layer opposite to the furnace core, so that the aging condition of the fire-resistant fiber can be synchronously checked during maintenance of the fire-layer bricks, the problem that other layers of refractory bricks which can be continuously used need to be synchronously replaced due to the aging replacement of the fiber material on the outermost layer of the vertical furnace wall fire-resistant zone of the gasification furnace is effectively solved, and the maintenance cost is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of design of a fire-resistant lining of a gasification furnace, in particular to a fire-resistant lining structure of a coal water slurry pressurized gasification furnace and a gasification furnace thereof.
Background
The coal water slurry pressurized gasifier is key equipment in the coal chemical industry in China at present, and the service life and the maintenance cost of the refractory lining of the gasifier directly influence the use efficiency of the gasifier and the economic benefit of the industry.
The refractory lining structure of the existing water-coal-slurry pressurized gasification furnace is as follows from inside to outside in sequence: the fire layer, the back lining layer, the heat insulation layer and the fiber compressible material layer close to the steel shell of the gasification furnace. The fiber compressible material has excellent heat preservation, heat insulation and construction performance due to low heat conductivity, and is widely applied to the inner wall of the steel shell of the gasification furnace.
The fiber compressible material tightly attached to the steel shell of the gasification furnace is easy to age under a long-time high-temperature environment, and the performance of the fiber compressible material layer after aging is reduced, so that the steel shell of the gasification furnace is over-heated, and the gasification furnace stops. And the replacement that is located perpendicular oven regional outer compressible bed of material of fibre, can go on after needing to dismantle other flame retardant coatings of oven inside, and the refractory brick's of back sheet and insulating layer life is longer in the oven, generally more than 8 years for the perpendicular oven is interior the refractory brick of back sheet and insulating layer has not reached life and just needs to be changed, has increased cost of maintenance, has reduced production efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the utility model provides a coal slurry pressurized gasifier fire-resistant lining structure and gasifier thereof has solved among the prior art fire-resistant lining structure fiber compressible bed of material and has aged when changing and reduce other refractory material life, increase cost of maintenance's problem.
The technical scheme adopted by the utility model is as follows:
a fire-resistant lining structure of a water-coal-slurry pressurized gasifier is characterized in that a fire facing layer, a fire-resistant fiber layer, a back lining layer and a heat insulation layer are sequentially arranged between the inner wall of the gasifier and a steel shell outside the gasifier.
Further, the inside of refractory lining structure is equipped with the ladder section, the ladder section increases in proper order from top to bottom the distance from the furnace core along the axis, the ladder section includes first flame facing layer, second flame facing layer and the insulating layer that sets gradually from inside to outside, be the complementary gomphosis of stair structure between first flame facing layer and the second flame facing layer, radially be the dilatation joint among the stair structure, be equipped with one deck refractory fiber layer between the vertical fitting surface.
Furthermore, the expansion gap is filled with an aluminum silicate refractory fiber rope and aluminum silicate refractory fiber cotton, and the aluminum silicate refractory fiber rope is wrapped in the aluminum silicate refractory fiber cotton and is positioned on one side of the expansion gap, which is far away from the furnace core.
Furthermore, a brick supporting plate and a rib plate are arranged below the second fire layer at the bottom of the step section, the brick supporting plate is of a right-angled triangle shape, the vertical right-angled edge of the brick supporting plate is welded on the steel shell of the furnace wall, the rib plate is welded on the transverse right-angled edge of the brick supporting plate, and the brick supporting plate and the outer surface of the rib plate are wrapped by refractory fiber materials.
Furthermore, the peripheries of the brick supporting plate and the rib plate are wrapped with aluminum silicate refractory fiber cotton with the thickness of 10-20mm, and the upper surface of the rib plate is wrapped with an aluminum silicate refractory fiber felt with the thickness of 3-8 mm.
Further, the inside of refractory lining structure is equipped with nozzle portion fire-resistant district, and nozzle portion fire-resistant district is third direction flame bed, refractory fiber layer, fourth direction flame bed and back sheet from inside to outside in proper order.
Furthermore, a thermocouple fire-resistant area is arranged on one side of the top end of the refractory lining structure along the axis of the furnace body, and the thermocouple fire-resistant area is sequentially provided with a fifth fire-oriented layer, a refractory fiber layer and a heat-insulating layer from inside to outside.
Furthermore, the fire-oriented layer, the first fire-oriented layer, the second fire-oriented layer, the third fire-oriented layer, the fourth fire-oriented layer and the fifth fire-oriented layer are all chromium-aluminum-zirconium bricks, the refractory fiber layer is aluminum silicate ceramic fibers, the back lining layer is chromium-steel-jade bricks, and the heat insulation layer is alumina bubble bricks.
Further, the thickness of the refractory fiber layer is 20-40 mm.
The utility model provides a gasifier with coal slurry pressurized gasifier fire-resistant lining structure, includes the box hat as the furnace body and sets up in the box hat inside and by the vault breach district, vault ball cone fire-resistant district, perpendicular oven fire-resistant district, the fire-resistant district of cone bottom and cinder notch portion that sets gradually from top to bottom, perpendicular oven fire-resistant district is fire-resistant lining structure, the fire-resistant fibre layer extends to along the furnace body axis in the fire-resistant district of cone bottom.
Due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. according to the gasifier developed by the utility model, the fiber compressible material layer is not arranged at the position of the vertical furnace wall fire-resistant area close to the gasifier steel shell, and the fire-resistant fiber layer is added to the side of the fire layer opposite to the furnace core, so that the aging condition of the fire-resistant fiber can be synchronously checked during the maintenance of the fire-resistant layer bricks, if the fire-resistant fiber layer bricks need to be replaced, the fire-resistant fiber layer bricks can be synchronously replaced, the problem that other layers of refractory bricks which can be continuously used need to be synchronously replaced due to the aging of the outermost fiber material layer in the vertical furnace wall fire-resistant area is effectively solved, the maintenance cost is greatly reduced, the condition that the furnace body steel shell is over-heated due to the aging of the outermost fiber compressible material layer is also avoided, and the normal operation of the gasifier can be effectively guaranteed.
2. According to the gasification furnace developed by the utility model, the expansion joint is internally filled with the aluminum silicate refractory fiber rope and the aluminum silicate refractory fiber cotton which are subjected to acid treatment, the refractory fiber rope is wrapped in the refractory fiber cotton, and the refractory fiber rope and the refractory fiber cotton are mutually fixed, so that the gasification furnace can be prevented from being washed away by high-speed airflow in the gasification furnace, and the effect of effectively preventing coal cinder from entering is achieved. Meanwhile, the refractory fibers have good compressibility and cannot influence the function of the expansion joint after being filled, and after the refractory fibers are treated by phosphoric acid, the phosphoric acid plays a role of a bonding agent, so that the refractory fibers can be further prevented from being washed away by high-speed airflow of a gasification furnace, coal slag is better prevented from entering the expansion joint, and the normal function of the expansion joint is guaranteed.
3. According to the gasifier developed by the utility model, the brick supporting plate and the rib plate which are arranged in the vertical furnace wall fire-resistant area are wrapped by adopting the fire-resistant fiber materials, and the fire-resistant fiber layer in the vertical furnace wall fire-resistant area is arranged, so that the heat insulation effect of the brick supporting plate and the rib plate of the gasifier is ensured, the possibility of over-temperature of the steel shell at the brick supporting plate and the rib plate is reduced, and the safety of the gasifier is improved.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the embodiment will be briefly described below, and it should be understood that the proportional relationship of each component in the drawings in this specification does not represent the proportional relationship in the actual material selection design, and is only a schematic diagram of the structure or the position, in which:
FIG. 1 is a schematic view of the structure of a gasification furnace of the present invention;
FIG. 2 is an enlarged view of a portion of the refractory lining structure of the present invention, taken at A in FIG. 1;
FIG. 3 is an enlarged view of a stepped section of the refractory lining structure of the present invention, taken at B in FIG. 1;
FIG. 4 is an enlarged view of a portion of the refractory area of the burner portion of the present invention, as shown at C in FIG. 1;
fig. 5 is a partially enlarged view of a thermocouple refractory area of the present invention, which is an enlarged view at D in fig. 1.
Reference numerals in the drawings indicate:
1-steel shell, 2-vault stopper opening area, 3-vault spherical cone fire-resistant area, 4-vertical furnace wall fire-resistant area, 5-cone bottom fire-resistant area, 6-cinder opening area, 41-flame-oriented layer, 42-refractory fiber layer, 43-backing layer, 44-heat-insulating layer, 45-expansion gap, 46-rib plate, 47-brick supporting plate, 411-first flame-oriented layer, 412-second flame-oriented layer, 7-burner nozzle part fire-resistant area, 8-thermocouple fire-resistant area, 711-third flame-oriented layer, 712-fourth flame-oriented layer and 811-fifth flame-oriented layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
The present invention will be described in detail with reference to fig. 1 to 5.
Example 1
As shown in fig. 1 and fig. 2, a coal water slurry pressurized gasifier refractory lining structure and a gasifier thereof comprise a steel shell 1 as a furnace body, and a vault stopper area 2, a vault spherical cone refractory area 3, a vertical furnace wall refractory area 4, a cone bottom refractory area 5 and a slag notch part 6 which are arranged in the steel shell 1 from top to bottom in sequence.
The vertical furnace wall fire-resistant zone 4 is arranged at a vertical cylindrical part of the gasification furnace, an annealing layer 41, a fire-resistant fiber layer 42, a backing layer 43 and a heat-insulating layer 44 are arranged between the inner wall of the gasification furnace and the steel shell 1 outside the gasification furnace in sequence in the vertical furnace wall fire-resistant zone 4, and the fire-resistant fiber layer 42 extends into the cone bottom fire-resistant zone 5 along the axis of the furnace body.
The perpendicular oven refractory space of gasifier is close to gasifier steel casing department and does not establish the compressible bed of material of fibre, change to adding one deck refractory fiber to the flame deck dorsad furnace core side, can examine refractory fiber's ageing condition in step when overhauing to the flame deck brick, if need change, change in step, effectively solved because of the ageing change of the outmost fibrous material in the refractory space of perpendicular oven, must change the resistant firebrick's of backing layer and insulating layer that can continue to use problem in step, greatly reduced cost of maintenance, also avoided leading to the condition that the furnace body steel casing is overtemperature because of the ageing compressible bed of material of outmost fibrous material, can effectively ensure the normal operating of gasifier.
Further, as shown in fig. 3, a step section is arranged inside the fire-resistant zone 4 of the vertical furnace wall, the distance from the top to the bottom of the furnace core along the axis of the step section is sequentially increased, the step section comprises a first fire layer 411, a second fire layer 412 and a heat insulation layer 44 which are sequentially arranged from inside to outside, the first fire layer 411 and the second fire layer 412 are in mutual engagement in a step structure, an expansion joint 45 is arranged in the step structure in the radial direction, and a layer of refractory fiber layer 42 with the thickness of 20mm is arranged between vertical matching surfaces.
The expansion gap 45 is filled with aluminum silicate refractory fiber ropes and aluminum silicate refractory fiber cotton which are soaked in phosphoric acid for 12 hours, and the aluminum silicate refractory fiber ropes are wrapped in the aluminum silicate refractory fiber cotton and are positioned on one side of the expansion gap 45 away from the furnace core.
The refractory fiber has good compressibility, the function of an expansion joint cannot be influenced after filling, and the expansion joint is filled with the refractory fiber cotton wrapping the refractory fiber rope, so that the refractory fiber cotton can be prevented from being washed away by high-speed airflow in the gasification furnace, and the effect of effectively preventing coal cinder from entering is achieved; after the refractory fibers are treated by the phosphoric acid, the phosphoric acid plays a role of a bonding agent, so that the refractory fibers can be further prevented from being washed away by high-speed airflow of the gasification furnace, coal slag is better prevented from entering the expansion joint, and the normal function of the expansion joint is ensured.
As shown in fig. 3, a brick supporting plate 47 and a rib plate 46 are arranged below a second fire layer 412 at the bottom of a step section of the vertical furnace wall fire-resistant area 4, the brick supporting plate 47 is a right-angle triangle, a vertical right-angle edge of the brick supporting plate 47 is welded on the furnace wall steel shell 1, a bevel edge of the brick supporting plate 47 is welded with the furnace wall steel shell 1 through a brick layer, the rib plate 46 is welded on a transverse right-angle edge of the brick supporting plate 47, aluminum silicate refractory fiber cotton with the thickness of 12mm is wrapped around the brick supporting plate 47 and the rib plate 46, and a layer of 3mm aluminum silicate refractory fiber felt is wrapped on the upper surface of the rib plate 46.
In the prior art, the brick supporting plate positioned in the fire-resistant area of the vertical furnace wall of the gasification furnace is two-layer towards the fire layer, and the heat conductivity to the fire layer brick is higher, so that the temperature of the brick supporting plate is higher than that of the steel shell at other parts of the inner wall of the gasification furnace in the operation process of the gasification furnace, and the possibility of overtemperature of the steel shell is increased. Through adopting refractory fiber material to wrap up the brick supporting plate and the rib plate at the brick supporting plate and the setting of the refractory fiber layer between the fire layers on two layers, the heat insulation effect at the brick supporting plate and the rib plate of the gasification furnace is ensured, the possibility of overtemperature of the steel shell at the brick supporting plate and the rib plate is reduced, and the safety of the gasification furnace is improved.
Further, as shown in fig. 4, four burner part fire-resistant regions 7 are arranged in the vertical furnace wall fire-resistant region 4, each burner part fire-resistant region 7 is sequentially provided with a third fire-resistant layer 711, a refractory fiber layer 42, a fourth fire-resistant layer 712 and a backing layer 43 from inside to outside, the fourth fire-resistant layer 712 is two layers of chromium-aluminum-zirconium bricks, and the layer far away from the furnace core is opposite to the backing layer 43 of the vertical furnace wall fire-resistant region 4 in the axial direction of the furnace body.
Further, as shown in fig. 5, the thermocouple refractory zone 8 on the top end side along the furnace axis in the vertical furnace wall refractory zone 4 is provided with a fifth flame-oriented layer 811, a refractory fiber layer 42 and a heat-insulating layer 44 in this order from the inside to the outside.
Furthermore, the flame-oriented layer (41), the first flame-oriented layer (411), the second flame-oriented layer (412), the third flame-oriented layer (711), the fourth flame-oriented layer (712) and the fifth flame-oriented layer (811) are all made of chrome-aluminum-zirconium bricks, the refractory fiber layer (42) is made of aluminum silicate ceramic fibers, the backing layer (43) is made of chrome-steel-jade bricks, and the heat insulation layer (44) is made of alumina bubble bricks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a coal slurry pressure gasification stove refractory lining structure which characterized in that: and a fire facing layer (41), a refractory fiber layer (42), a backing layer (43) and a heat insulation layer (44) are sequentially arranged between the inner wall of the refractory lining structure and the steel shell (1) outside the furnace.
2. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 1, characterized in that: the inside of refractory lining structure is equipped with the ladder section, the ladder section increases in proper order from top to bottom the distance from the furnace core along the axis, the ladder section includes first fire layer (411), second fire layer (412) and insulating layer (44) that set gradually from inside to outside, be the complementary gomphosis of stair structure between first fire layer (411) and the second fire layer (412), radially be expansion joint (45) among the stair structure, be equipped with one deck refractory fiber layer (42) between the vertical fitting surface.
3. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 2, characterized in that: the expansion gap (45) is filled with an aluminum silicate refractory fiber rope and aluminum silicate refractory fiber cotton, and the aluminum silicate refractory fiber rope is wrapped in the aluminum silicate refractory fiber cotton and is positioned on one side of the expansion gap (45) far away from the furnace core.
4. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 2, characterized in that: a brick supporting plate (47) and a rib plate (46) are arranged below a second fire layer (412) at the bottom of the stair section, the brick supporting plate (47) is of a right-angle triangle shape, a vertical right-angle edge of the brick supporting plate (47) is welded on the furnace wall steel shell (1), the rib plate (46) is welded on a transverse right-angle edge of the brick supporting plate (47), and refractory fiber materials are wrapped on the outer surfaces of the brick supporting plate (47) and the rib plate (46).
5. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 4, wherein: the peripheries of the brick supporting plate (47) and the rib plate (46) are wrapped with aluminum silicate refractory fiber cotton with the thickness of 10-20mm, and the upper surface of the rib plate (47) is wrapped with an aluminum silicate refractory fiber felt with the thickness of 3-8 mm.
6. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 1, characterized in that: the refractory lining structure is provided with a burner part fire-resistant area (7), and the burner part fire-resistant area (7) is sequentially provided with a third flame-retardant layer (711), a refractory fiber layer (42), a fourth flame-retardant layer (712) and a back lining layer (43) from inside to outside.
7. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 1, characterized in that: the refractory lining structure is provided with a thermocouple fire-resistant area (8) along one side of the top end of the furnace body axis, and the thermocouple fire-resistant area (8) is sequentially provided with a fifth fire layer (811), a refractory fiber layer (42) and a heat insulation layer (44) from inside to outside.
8. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claims 1 to 7, characterized in that: the fire-oriented layer (41), the first fire-oriented layer (411), the second fire-oriented layer (412), the third fire-oriented layer (711), the fourth fire-oriented layer (712) and the fifth fire-oriented layer (811) are all chrome-aluminum-zirconium bricks, the refractory fiber layer (42) is aluminum silicate ceramic fibers, the back lining layer (43) is chrome-steel-jade bricks, and the heat insulation layer (44) is alumina bubble bricks.
9. The refractory lining structure of a water-coal-slurry pressure gasification furnace according to claim 8, wherein the thickness of the refractory fiber layer (42) is 20-40 mm.
10. The utility model provides a gasifier with coal slurry pressurized gasifier fire-resistant lining structure, includes steel casing (1) as the furnace body and sets up in steel casing (1) inside and by last vault breach district (2), vault ball cone fire-resistant district (3), perpendicular oven fire-resistant district (4), the fire-resistant district (5) and cinder notch portion (6) that set gradually down, its characterized in that: the vertical furnace wall refractory zone (4) is a refractory lining structure according to any one of claims 1 to 9, and the refractory fiber layer (42) extends into the cone bottom refractory zone (5) along the furnace body axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120904993.0U CN215712839U (en) | 2021-04-28 | 2021-04-28 | Fire-resistant lining structure of water-coal-slurry pressurized gasification furnace and gasification furnace thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120904993.0U CN215712839U (en) | 2021-04-28 | 2021-04-28 | Fire-resistant lining structure of water-coal-slurry pressurized gasification furnace and gasification furnace thereof |
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| CN215712839U true CN215712839U (en) | 2022-02-01 |
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| CN202120904993.0U Active CN215712839U (en) | 2021-04-28 | 2021-04-28 | Fire-resistant lining structure of water-coal-slurry pressurized gasification furnace and gasification furnace thereof |
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