CN209926864U - Furnace bottom heat preservation structure of calcium carbide furnace - Google Patents
Furnace bottom heat preservation structure of calcium carbide furnace Download PDFInfo
- Publication number
- CN209926864U CN209926864U CN201920586658.3U CN201920586658U CN209926864U CN 209926864 U CN209926864 U CN 209926864U CN 201920586658 U CN201920586658 U CN 201920586658U CN 209926864 U CN209926864 U CN 209926864U
- Authority
- CN
- China
- Prior art keywords
- bricks
- clay
- brick
- built
- stones
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model discloses a carbide stove bottom insulation construction is located the carbide stove bottom, builds on the steelframe as carbide stove bottom shell, is the lamellar structure, follows supreme asbestos board, the resistant firebrick of clay, high-alumina brick, light carbon block and the self-baking carbon brick of being in proper order down, the asbestos board paves on the steelframe, and the number of piles of tiling is 3 layers, plays smooth effect, and the resistant firebrick of clay is built by laying bricks or stones on the asbestos board, and the number of piles that the resistant firebrick of clay was built by laying bricks or stones is 5-8 layers, and the high-alumina brick is built by laying bricks or stones on the resistant firebrick of clay, builds by laying bricks or stones the number of piles and is 8-10 layers, and light carbon block tiling one. The utility model discloses an increase the refractory material layer of low thermal conductivity to replace the refractory material of partly high thermal conductivity, adopt new construction methods simultaneously, reached the purpose that improves heat utilization efficiency and reduce the energy consumption, reduced manufacturing cost simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the kiln heat preservation technique and specifically relates to a carbide stove bottom insulation structure is related to.
Background
The calcium carbide furnace is main equipment for producing calcium carbide products, lime (CaO) and carbonaceous materials (C) are subjected to high temperature of 2300 ℃ in the calcium carbide furnace, and the product formed after reaction is calcium carbide (CaC)2). In the current process of using the calcium carbide furnace to produce calcium carbide, the electricity consumption accounts for about 50% of the production cost.
At present, the calcium carbide furnace has no excessive requirement on the heat conductivity coefficient of the refractory material built by the lining, most products with larger heat conductivity coefficient are used, and the products are clay refractory bricks, high-alumina refractory bricks and self-baking carbon bricks which are generally arranged from the bottom of a furnace shell in sequence, wherein the heat conductivity coefficient (the heat conductivity coefficient: the heat passing by a sample in unit area) of the clay refractory bricks is 0.84+0.58 multiplied by 10-3The heat conductivity coefficient of the high-aluminum refractory brick is 2.09+1.861 multiplied by 10-3The heat conductivity coefficient of the self-baking carbon brick is 4.51+1.48 multiplied by 10 at W/m DEG C-3The high heat conductivity coefficients of the three refractory materials provide high transmission for the diffusion of the furnace bottom temperature, which is not beneficial to the heat preservation and storage of the furnace bottom temperature, greatly loses the heat energy efficiency, and increases the power consumption. In the masonry method using the high heat-conducting refractory material, it is found that the temperature of lime and carbon in the hearth sequentially passes through three layers of self-baking carbon bricks, high-alumina refractory bricks and clay refractory bricks from top to bottom under the condition that the reaction temperature is 2300 ℃, and then reaches the first layer of clay refractory bricks at the bottom of the hearth in the whole process of furnace temperature transfer and transportation, which is higher than the temperature of 300 ℃, so that the diffusion of heat energy is greatly consumed, and therefore, the improvement is needed.
At present, GB21343-2015 (calcium carbide unit product energy consumption limit) also limits the power consumption of the existing calcium carbide production device, so that the problem to be solved at present is to reduce the energy consumption of a calcium carbide furnace.
SUMMERY OF THE UTILITY MODEL
The calcium carbide furnace uses the refractory material with high heat conductivity, which is a reason that the calcium carbide furnace has high energy consumption, the refractory material with high heat conductivity can cause much heat loss of the calcium carbide furnace, and the electric energy utilization rate is low, so that the refractory material with low heat conductivity coefficient is used as the heat insulation structure of the calcium carbide furnace, and the calcium carbide furnace is an approach for saving energy consumption and improving the heat utilization rate.
Because the calcium carbide furnace is in operation, the raw materials are stacked on the furnace bottom, and the high-temperature reaction is also carried out on the furnace bottom, when the calcium carbide furnace is built, the refractory material used by the calcium carbide furnace bottom accounts for half of the refractory material used by the whole calcium carbide furnace, and therefore, the change of the heat insulation structure of the calcium carbide furnace bottom is an important link for saving energy of the calcium carbide furnace.
In view of this, the utility model aims at prior art's not enough, provide a carbide stove bottom insulation construction, adopt the refractory material layer that increases low thermal conductivity to replace the refractory material of some high thermal conductivity, adopt new construction methods simultaneously, reached the purpose that improves heat utilization efficiency and reduce the energy consumption, reduced manufacturing cost simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a calcium carbide furnace bottom heat preservation structure is located at the bottom of a calcium carbide furnace, is constructed on a steel frame serving as a calcium carbide furnace bottom shell and is of a layered structure, and sequentially comprises an asbestos plate, clay refractory bricks, high-alumina bricks, light carbon blocks and self-baking carbon bricks from bottom to top, wherein the asbestos plate is laid on the steel frame, the number of laid layers is 3, so that the asbestos plate plays a leveling role, the clay refractory bricks are built on the asbestos plate, the number of laid layers of the clay refractory bricks is 5-8, the high-alumina bricks are built on the clay refractory bricks, the number of built layers is 8-10, the light carbon blocks are laid one layer on the high-alumina bricks, the self-baking carbon bricks are built on the top, and the number of built layers is 2.
The thickness of the asbestos plate is 10mm, the clay refractory brick and the high-alumina brick are in accordance with the specification of a refractory brick G-2 for a blast furnace, the thickness of the clay refractory brick and the high-alumina brick is 77mm, the specification of the light carbon block and the self-baking carbon brick is 400 multiplied by 1200mm, the light carbon block and the self-baking carbon brick are processed into required sizes by a planer or a milling machine, and the tolerance size of each block is less than or equal to +/-1 mm.
The masonry modes of the asbestos plate, the clay refractory bricks, the high-alumina bricks, the light carbon blocks and the self-baking carbon bricks are staggered masonry, namely, layers are staggered to form a right angle, and the brick gaps of the light carbon blocks and the self-baking carbon bricks are less than or equal to 2 mm.
Further, the clay refractory bricks and the high-alumina bricks are primary bricks.
Furthermore, no filling material is filled between brick joints of the clay refractory bricks and the high-alumina bricks.
Furthermore, the light carbon blocks and the self-baking carbon blocks are built by melting slit paste.
The utility model adds a layer of light carbon block in the heat preservation structure of the furnace bottom of the existing calcium carbide furnace, because the heat conductivity coefficient of the light carbon block is 1.25W/m DEG C and is far lower than the heat conductivity coefficient of the self-baking carbon brick by 4.51W/m DEG C, because the working temperature of the light carbon block is 1600-, blowing out for maintenance seriously affects production.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses reduced the highest temperature that high alumina brick and clay firebrick bore after using light charcoal brick, high alumina brick after the cooling is able to effectually carry out long-term work in suitable temperature with clay firebrick, has got rid of and has surpassed firebrick at original stove bottom high temperature and has born the risk that causes the harm under the temperature.
2. The utility model discloses a heat preservation structural layer life-span prolongs greatly, compares with current technique, and its overhaul interval time is the nearly twice of prior art.
3. Compared with the prior art, the utility model, insulation construction, carbide stove surface temperature can reduce about 150 ℃, and the heat utilization efficiency of electric energy obviously improves, and the effect of practicing thrift the electric energy is showing.
4. The utility model discloses a heat preservation structure is difficult to damage, has reduced the number of times of blowing out the maintenance, and its manufacturing cost has great reduction, has increased considerable profit.
Drawings
FIG. 1 is a schematic view of a furnace bottom heat preservation structure of a conventional calcium carbide furnace.
Fig. 2 is a schematic view of the heat preservation structure of the present invention.
FIG. 3 is a diagram showing the bottom temperature distribution of the existing calcium carbide furnace.
Fig. 4 is a temperature distribution diagram of the present invention.
In the figure: the heat-insulating brick comprises a steel frame 1, an asbestos plate 2, clay refractory bricks 3, high-alumina bricks 4, light carbon blocks 5, self-baking carbon bricks 6 and a side heat-insulating layer 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the thermal insulation structure of the conventional calcium carbide furnace bottom is located at the calcium carbide furnace bottom, is constructed on a steel frame 1 as a shell of the calcium carbide furnace bottom, is of a layered structure, and sequentially comprises an asbestos plate 2, clay refractory bricks 3, high-alumina bricks 4 and self-baking carbon bricks 6 from bottom to top, wherein the asbestos plate 2 is tiled on the steel frame 1, the tiled layers are 3 layers and play a leveling role, the clay refractory bricks 3 are built on the asbestos plate 2, the clay refractory bricks 3 are built on 5 layers, the high-alumina bricks 4 are built on the clay refractory bricks 3, the building layers are 8 layers, the self-baking carbon bricks 6 are built on the uppermost surface, the building layers are 3 layers, the clay refractory bricks 3 and the high-alumina bricks 4 are built by a refractory clay dry method, the self-baking carbon bricks 6 are built by low-temperature rough joint paste ramming, and the brick joints of the self-baking carbon bricks 6 are 30.
As shown in fig. 2, the utility model discloses an increase one deck light carbon block 5 on current carbide stove bottom insulation construction, light carbon block 5 is located high-alumina brick 4 and self-baking carbon brick 6, replaces one deck self-baking carbon brick 6, light carbon block 5 and self-baking carbon brick 6 all need be processed into required size with planer or milling machine, and every tolerance size is 0.8mm, the masonry mode of asbestos board 2, clay resistant brick 3, high-alumina brick 4, light carbon block 5 and self-baking carbon brick 6 is stagger joint masonry, and crisscross the right angle between the layer, the masonry mode of clay resistant brick 3 and high-alumina brick 4 is laid futilely, does not fill material between the masonry brickwork joint, light carbon block 5 and self-baking carbon brick 6 are with the thin seam paste that melts.
The thickness of the asbestos plate 2 is 10mm, the clay refractory bricks 3 and the high-alumina bricks 4 are refractory bricks G-2 for blast furnaces, the thickness of the clay refractory bricks is 77mm, the clay refractory bricks and the high-alumina bricks are first-grade products, and the specifications of the light carbon blocks 5 and the self-baking carbon blocks 6 are 400 multiplied by 1200 mm.
In the heat-insulating layer of the furnace bottom of the existing calcium carbide furnace, the clay refractory bricks 3 are laid at the bottom layer of the whole calcium carbide furnace and are also used at the part with the lowest furnace bottom temperature, the production and use temperature of the part cannot exceed the refractoriness under load of the clay refractory bricks 3 by 1400 ℃, otherwise, the melting damage of the clay refractory bricks 3 at the furnace bottom is easily caused, but the operating temperature of the part is always 1200 ℃ in the actual production process and is close to the critical point of the refractoriness under load of the clay refractory bricks 3; the high-alumina brick 4 is much higher than the clay refractory brick 3 in material and use temperature, but is higher than the clay refractory brick 3 in heat conductivity coefficient; and self-baking carbon bricks 6 are laid on the high-alumina bricks 4 layers.
The existing calcium carbide furnace bottom heat-insulating layer has high-temperature risks in two aspects:
① the smelting temperature at the bottom of the furnace is transferred to the bottom layer by layer through the refractory material, and the heat preservation layer at the bottom of the furnace can not completely form the slowing of the temperature at the bottom of the furnace, which easily causes the loss of a large amount of heat energy efficiency, but increases the power consumption.
② when the temperature is too high, the softening temperature of part of the firebricks in the furnace bottom heat-insulating layer will be over the critical refractoriness under load, which will cause the melting damage of part of the firebricks in the furnace bottom heat-insulating layer, and the furnace shutdown maintenance will be needed, which will affect the normal production.
The utility model discloses an increase one deck light charcoal piece between self-baking carbon brick and high-alumina brick, change the masonry mode of clay firebrick, high-alumina brick, light charcoal piece and self-baking carbon brick simultaneously, effectually slowed down the transmission of carbide stove bottom temperature for the stove temperature fully stops at stove bottom melting zone and carries out the smelting of carbide, lets stove bottom firebrick layer more add the also effectual production power consumption that has reduced of safety guarantee.
By comparing the graph in fig. 3 and fig. 4, the temperature of the junction of the high-alumina refractory brick and the carbon brick layer is reduced by 152 ℃ after the light carbon brick is used, the temperature of the junction of the clay refractory brick and the high-alumina refractory brick is reduced by 300 ℃, and the final temperature of the furnace bottom is reduced by about 150 ℃ compared with the original masonry method. The furnace bottom refractory bricks after being cooled can effectively work for a long time at a proper temperature, and the risk of damage caused by the fact that the original furnace bottom temperature is too high and exceeds the bearing temperature of the refractory bricks is eliminated.
The utility model discloses in adopting the masonry technology after changing carbide stove bottom refractory material, the overhaul interval of carbide stove bottom heat preservation also has original 3 years to prolong to nearly 6 years.
The utility model discloses a carbide stove bottom surface temperature can reduce about 150 ℃, and the heat utilization efficiency of electric energy obviously improves, and the effect of practicing thrift the electric energy is showing.
The utility model discloses use including the inner Mongolia, according to the carbide production quotation in the inner Mongolia region at present, sell the price of electricity according to inner Mongolia western electric wire netting about 0.4 yuan/kW h, a 40500kVA carbide stove daily output is about 220 tons, production time 330 days per year, total output is about 72600 tons, 50kW h of power consumption can be practiced thrift to per ton, annual energy consumption 72600 x 50kW h =3630000kW h can realize annual energy consumption cost about 3630000kW h x 0.4 yuan/kW h =1452000 yuan.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a carbide stove bottom insulation construction, is located carbide stove bottom, constructs on steelframe (1) as carbide stove bottom shell, is the lamellar structure, its characterized in that: from supreme asbestos board (2), the resistant firebrick of clay (3), high alumina brick (4), light carbon block (5) and from baking carbon brick (6) down in proper order, asbestos board (2) tile on steelframe (1), the number of piles of tiling is 3 layers, resistant firebrick of clay (3) are built by laying bricks or stones on asbestos board (2), the number of piles that resistant firebrick of clay (3) was built by laying bricks or stones is 5-8 layers, high alumina brick (4) are built by laying bricks or stones on resistant firebrick of clay (3), the number of piles of building by laying bricks or stones is 8-10 layers, light carbon block (5) tile one deck is on high alumina brick (4), the top is built by laying bricks or stones from baking carbon brick (6), the.
2. The calcium carbide furnace bottom heat preservation structure of claim 1, characterized in that: the thickness of the asbestos plate (2) is 10mm, the clay refractory bricks (3) and the high-alumina bricks (4) are in accordance with the specification of refractory bricks G-2 for a blast furnace, the thickness of the clay refractory bricks and the high-alumina bricks is 77mm, the specifications of the light carbon blocks (5) and the self-baking carbon blocks (6) are 400 multiplied by 1200mm, and the tolerance size of each block is less than or equal to +/-1 mm.
3. The calcium carbide furnace bottom heat preservation structure of claim 2, characterized in that: the masonry modes of the asbestos plate (2), the clay refractory bricks (3), the high-alumina bricks (4), the light carbon blocks (5) and the self-baking carbon bricks (6) are staggered masonry, and the brick joints of the light carbon blocks (5) and the self-baking carbon bricks (6) are less than or equal to 2 mm.
4. The calcium carbide furnace bottom heat preservation structure of claim 3, characterized in that: and no filling material is filled between brick joints of the clay refractory bricks (3) and the high-alumina bricks (4).
5. The calcium carbide furnace bottom heat preservation structure of claim 3, characterized in that: the light carbon blocks (5) and the self-baking carbon blocks (6) are built by melting slit paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920586658.3U CN209926864U (en) | 2019-04-26 | 2019-04-26 | Furnace bottom heat preservation structure of calcium carbide furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920586658.3U CN209926864U (en) | 2019-04-26 | 2019-04-26 | Furnace bottom heat preservation structure of calcium carbide furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209926864U true CN209926864U (en) | 2020-01-10 |
Family
ID=69088467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920586658.3U Active CN209926864U (en) | 2019-04-26 | 2019-04-26 | Furnace bottom heat preservation structure of calcium carbide furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209926864U (en) |
-
2019
- 2019-04-26 CN CN201920586658.3U patent/CN209926864U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102322623B (en) | Coke oven top waste heat reclaiming system | |
| CN205258011U (en) | Horizontal acheson graphitizing furnace | |
| CN105502361A (en) | Graphitization technology of Acheson furnace for producing anode materials | |
| CN208313028U (en) | Energy-saving gas crucible furnace | |
| CN203216272U (en) | Conductive heat preservation type flame path wall structure of anode baking furnace | |
| CN209926864U (en) | Furnace bottom heat preservation structure of calcium carbide furnace | |
| CN101037775A (en) | Lining structure of large-scale pre-baking aluminium electrolysis trough | |
| CN110540842B (en) | Furnace body repairing method for recycling coke oven after overall shutdown | |
| CN104501586A (en) | Furnace bottom structure capable of realizing reduction of deep bed for rotary hearth furnace | |
| CN201066240Y (en) | Aluminum cathode baking oven side wall structure | |
| CN204438757U (en) | A kind of rotary hearth furnace hearth structure realizing deep bed sintering reduction | |
| CN106643183A (en) | Furnace loading method for electrode production through Acheson graphitizing furnace | |
| CN107162432B (en) | A kind of device of liquid blast furnace production mineral wool | |
| CN111560486A (en) | Blast furnace bottom building method for guiding furnace bottom to be in shape of boiler bottom | |
| CN202532886U (en) | Compound furnace wall for vertical volatilization furnace | |
| CN219637279U (en) | Steel bottle annealing furnace | |
| CN220911981U (en) | Heat preservation furnace body of industrial silicon smelting furnace and industrial silicon smelting furnace | |
| CN111575026A (en) | Novel heat insulation structure of coke oven foundation roof | |
| CN216864292U (en) | Composite furnace lining structure of pre-vacuumized high-temperature carburizing multipurpose furnace | |
| CN220245897U (en) | Furnace top structure of glass kiln | |
| CN204569985U (en) | A kind of steel tube anneal stove | |
| CN212504700U (en) | Novel heat insulation structure of coke oven foundation roof | |
| CN212833432U (en) | Arch brick of glass melting furnace | |
| CN201686605U (en) | All-electric melting insulator glass kiln | |
| CN221027709U (en) | Yellow phosphorus production electric stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |