CN212246883U - Composite construction coke jar with self sealss - Google Patents
Composite construction coke jar with self sealss Download PDFInfo
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- CN212246883U CN212246883U CN202021121889.6U CN202021121889U CN212246883U CN 212246883 U CN212246883 U CN 212246883U CN 202021121889 U CN202021121889 U CN 202021121889U CN 212246883 U CN212246883 U CN 212246883U
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Abstract
A coke tank with a self-sealing composite structure mainly comprises a coke inlet section, a storage cylinder section and a coke outlet section; each section consists of a metal shell, an anchoring piece on the inner wall of the metal shell and a casting material layer, and the sections are mutually embedded and hermetically connected; coke inlet section configuration: a metal mesh layer is fixed on the anchoring piece and is connected with the anchoring piece; storage cylinder body section structure: a metal mesh layer is fixed on the anchoring piece and is connected with the anchoring piece; sticking a nanometer insulation board on the metal shell; the coke outlet section structure is the same as the storage cylinder body section structure. The utility model discloses under the prerequisite that does not increase the cost of manufacture, can improve the life of burnt jar welt, change cycle than original improvement at least 6 months, the maintenance cost can hang down at least 30%, and can reduce 50~100 ℃ of shell surface temperature.
Description
Technical Field
The utility model relates to a coking industry is equipment for dry coke quenching, concretely relates to composite construction coke jar with self sealss.
Background
Compared with wet quenching, the dry quenching technology (CDQ) has obvious advantages, can recover the sensible heat of red coke, improve the coke strength, is beneficial to the iron-making operation of a blast furnace and reduces the coke ratio. The dry quenching device has long service life, and if the dry quenching production volume of an enterprise is not surplus, the production stop maintenance has great influence on the iron-making production, and the gap and guarantee problem of the iron-making dry quenching exists.
The coke tank is arranged on a coke tank carrying vehicle and is dragged by an electric locomotive to reciprocate under a coke oven hole and a dry quenching lifting derrick. The coke tank carries the red coke pushed out from the coking chamber, and the red coke is conveyed to the top of the dry quenching furnace and is matched with a loading device to load the red coke into the dry quenching furnace. Due to the continuous operation of the coke dry quenching system, the coke drum, which is in direct contact with the red coke, must have a high operational reliability. The temperature of the mature red hot coke pushed out from the coking chamber of the coke oven is about 1050 +/-50 ℃, the rotary coke tank drives a speed reducer by a driving motor to enable the coke tank to rotate around the center in the coke receiving process, and the speed reducer rotates 6-9 revolutions per minute, so that the loading coefficient of the coke can be improved, the weight and the volume of the coke tank can be reduced, and meanwhile, the particle size distribution of the coke in the coke tank can be improved. The rotary coke tank mainly comprises a coke tank body, a lining plate, a hanging rod, a transmission rod, an annular octagonal beam, a guide wheel set, a bottom gate, a buffer seat, refractory materials, a lubricating pipeline and the like. The coke tank body is mainly formed by welding a steel plate with the thickness of 10mm and T-shaped steel and is used as a support of the whole coke tank body, and the structural member is made of Q345B. The coke drum lining plate is used as a part which is in direct contact with red hot coke, and the material of the part needs stronger heat resistance and wear resistance, strength and toughness in a hot state and the performance of adapting to the alternating change of cold and heat. Some straight parts of the lining plate are made of heat-resistant iron castings, and the materials are QT 600-3, G35Cr24Ni7, ZG3Cr7Si2 or heat-resistant stainless steel 20X23H 18; the cone section and the bottom gate part lining plate are made of heat-resistant cast steel ZG35Cr24Ni7SiN, heat-resistant stainless steel 20X23H18 and the like, have good wear resistance and heat resistance, and can resist heat of 1100 ℃ in a short time. The lining plate of the coke tank of some companies is made of heat-resistant stainless steel, the connecting bolt in contact with the red coke is made of stainless steel with a large square head structure, and the connecting mode of the lining plate and the coke tank framework is firmer and more reliable; to improve the life of the lining plate and avoid premature damage.
The heat-resistant cast iron has good high-temperature resistance, is low in material price, but has high hardness, large brittleness, frangibility, incapability of finishing, poorer thermal fatigue performance and short service life, and is generally only used for a side wall lining plate. The medium chromium cast steel ZG3Cr7Si2 has good high temperature resistance, good chilling and heating resistance, better performance and moderate price, and has the defect of poor heat insulation performance compared with heat-resistant steel; the service life is short, and the cost is high. The heat-resistant alloy steel can resist the high temperature of 1130 ℃, but has high price, poor processability and difficult manufacture, and some domestic materials need to be imported.
As the coke tank and the coke tank cover of the dry quenching coke have short service life, the lining plate falls off, burns and damages and causes various equipment problems in the using process, thereby influencing the normal production of the dry quenching coke. 2520 cast steel pouring blocks are used for dry quenching rotary coke tank lining plates of a certain company, and the cast steel pouring blocks need to be integrally replaced once in 0.5-1 year on average. Due to the problems of materials and production operation, coke of a furnace end with a part of furnace number is generated to cause a coke tank of a cake coke, a lining plate is burnt for a long time, the local replacement of the lining plate of the coke tank is too frequent, and the maintenance cost is high; frequent replacement of the lining plates results in reduced dry quenching rate, reduced steam yield and reduced coke quality. If the damaged lining plate falls into the dry quenching furnace, the health of the maintainers can be seriously threatened in the treatment process. The bottom welt easily drops, causes the direct burnt cage structure that loses of red burnt, and life is shorter. Generally, a maintainer needs to stop the machine for overhauling the lower structure of the focusing cage frame once in 1-2 months, and is often forced to water to cool the coke tank due to the time and heavy task, and the quenching and suddenly heating of the lining plate and the structure of the focusing tank are greatly damaged. Frequent overhaul causes equipment materials, the cost of labor to be in the high consumption state all the time, and the structure warp after repairing repeatedly and is difficult to rectify seriously, leads to the welt installation difficulty, and vicious circle also can shorten the life of cage by a wide margin.
After retrieval: the Chinese patent application No. CN200510039214.0 discloses a rotary coke tank, which comprises a tank body and two split bottom doors connected with the tank body, wherein the tank body is a cylindrical and latticed framework, the upper edge of the inner side of the tank body is in a horn shape, the middle part of the tank body is in a cylindrical shape, the lower part of the tank body is in a funnel shape, heat insulating materials and lining plates are arranged at the upper part and the lower part of the inner side of the tank body, and a tank bottom ring and sealing materials are arranged at the bottom of the; the lower part of the framework is provided with a sealing cover, an elastic support and a bottom door hinge seat; the bottom door provided with a hoisting beam and a conical positioning hole is hinged on two sides of the bottom of the tank body; hoisting grooves are arranged at two ends of the hoisting beam. The structure can meet the requirement of the rotary coke transfer of the coke tank, the load of the loaded coke is uniform, and the problems are that the lining plate is made of alloy or heat-resistant cast iron, the burning loss and the dropping are easy, the heat dissipation is large, and the spontaneous combustion of the coke is caused by air leakage easily.
Chinese patent publication No. CN110643377A, which is directed to a maintenance-free dry quenching coke tank: the cylindrical barrel in the outer layer structure of the coke tank is an integral structure, the part of the inverted frustum-shaped barrel is also an integral structure, the cylindrical barrel and the inverted frustum-shaped barrel are connected into an integral structure without using a support frame, and the outer layer structure is made of steel plates; the coke pot inner layer is also called as a pouring layer, is made of refractory materials and is tightly attached to the outer layer, so that the defects of an interlayer between the inner layer and the outer layer and the inner layer from being tilted are overcome. The inner layer of the cylindrical barrel body and the round platform-shaped barrel body have different material densities and thicknesses of pouring layers so as to adapt to the impact force and the like of different parts. The problems are that the whole steel plate of the shell is difficult to be formed by alloy or heat-resistant cast iron, the casting material is difficult to be uniformly constructed, is easy to be peeled and cracked, and is different from a steel shell in expansion coefficient under long-term use, so that the cracking is caused.
The Chinese patent publication No. CN109704792A discloses a castable for manufacturing a coke pot lining and a method for manufacturing the coke pot lining, wherein the castable comprises the following components in percentage by weight: high bauxite with a particle size in the range of 5mm to 8 mm: 10% -22%; calcium hexaluminate having a particle size in the range of 3mm to 5 mm: 20% -38%; calcined quartz with a particle size in the range of 1mm to 3 mm: 6 to 10 percent; forsterite having a particle size of 1mm or less: 11 to 21 percent; magnesium aluminate spinel with 180 mesh particle size: 9% -19%; ethyl silicate: 2% -7%; hydrated alumina with particle size less than 0.088 mm: 2% -10%; dextrin: 1% -4%; water reducing agent: 1 to 3 percent. The high-alumina bauxite has poor rapid cooling and heating resistance, a coke tank is used for discharging coke for tens of times a day and charging coke, and the casting material is easy to damage; the ethyl silicate and the hydrated alumina are combined, so that the strength is low and the wear is not resisted.
The Chinese patent publication No. CN209854057U discloses a novel coke tank composite lining plate and a tank body thereof, wherein the novel coke tank composite lining plate is formed by connecting a steel plate layer and a refractory material layer up and down; the steel plate layer and the refractory material layer are connected by a fixed connection device; the fixing device is an anchoring nail or a bolt. The length of the composite lining board is 300-600mm, the width is 300-500mm, and the thickness is 40-60 mm; the thickness of the steel plate layer is 3-5 mm. A plurality of prefabricated composite lining plates are fixed on the frame of the coke tank in a welding, bolt or riveting mode, and the modification or manufacturing cost is much lower than that of the original alloy lining plate. The coke tank frame is a metal part and can deform after long-term use, and the small lining plates have more welding seams and are easy to burn through; the bolt or the anchoring tripod has poor fixation stability, and the overall coke impact resistance and wear resistance are poor; and easily leaks air to burn coke.
The document with the Chinese patent publication No. CN110511771A mainly solves the problems of extrusion damage to the edge of a coke outlet and alignment and sealing of a coke tank cover and a coke tank caused by red coke hanging on a bottom gate by arranging an outlet protection ring at the coke outlet.
The bottom structure of the document with the Chinese patent publication No. CN209652227U comprises a pouring body and a middle beam, wherein the pouring body is sleeved on the middle beam, two sides of the pouring body are a vertical pouring area and a raised pouring area, and a plurality of groups of V-shaped reinforcing ribs are arranged inside the pouring body; thereby further improving the deformation resistance and the falling resistance of the casting body.
Chinese patent publication No. CN208980641U, which includes several coke pot bottom lining plates, conical section part lining plates, cylindrical section part lining plates or upper edge lining plates, several longitudinal and transverse ribs are provided on the inner surface of each lining plate, so that the inner surface forms several grooves, through holes connected with the coke pot are provided on each lining plate or/and mounting posts connected with the coke pot are provided on the back of the lining plate, and the inner surface of the lining plate is provided with a nano ceramic layer. The defects are that the lining plates have gaps with each other, the fire is easy to spread, the nano coating is easy to peel off, the nano coating does not resist rapid cooling and rapid heating, and the expansion coefficient difference with metal is too large.
Chinese patent publication is CN 108485684A's literature, coke pot welt, including welt body and welt fossil fragments, the welt body is refractory castable, and the back is baked after the mould shaping and forms, the welt fossil fragments are phi 12mm stainless steel and make and be pi shape support, pi shape support is arranged in block inside length to making the welt fossil fragments, welds with the head of a bolt in pi shape stainless steel support top middle part, makes the screw rod perpendicular with the support plane, and the screw rod stretches out block surface certain distance. The defect of the method is that the difference of the expansion coefficients of the casting material and the stainless steel with the diameter of 12mm is too large, and the thick bracket promotes the anisotropic expansion of the casting material to cause cracking and easily causes the heat dissipation of local points.
The coke pot lining plate described in Chinese patents CN204265692U and CN203036233U is characterized in that the bolt and the lining plate are fixed in a mode independent of the composite lining body. The preparation method of the high-temperature wear resistant lining plate for the coke pot, which is disclosed in the Chinese patent CN102212820A, is characterized by comprising a metal lining plate and a metal ceramic layer cladded on the surface of the metal lining plate. The problems are that the metal coating is easy to peel off, is not resistant to rapid cooling and rapid heating, and has a large difference with the expansion coefficient of the metal. The wear-resistant castable for coke pots, which is described in Chinese patent CN110668832A, comprises the following components: alumina: 30-68 parts of a solvent; the granularity of the alumina is less than or equal to 5 mm; alumina hollow spheres: 10-45 parts; the granularity of the alumina hollow sphere is less than or equal to 3 mm; alumina micropowder: 1-5 parts; silicon micropowder: 5-12 parts of a solvent; pure calcium aluminate cement: 3-10 parts; dispersing agent: 0.1-1 part; explosion-proof agent: 0.1-1 part; tartaric acid: 0.02-0.03 part. It has good compressive strength, rupture strength and wear resistance; however, the hollow spheres are too many, alumina is taken as a main component, and the properties of rapid cooling and rapid heating are poor, so the hollow spheres are easy to peel off.
From the literature retrieved: although some manufacturers in China use refractory castable to cast coke pot linings, the coke pot linings are generally used for coke ovens of 4m and 6m, the coke ovens have small coke pot volumes and certain effects, but the problem of liner plate material peeling still exists. Therefore, more practical coke tank structure and material need to be developed to meet the production requirement.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of easy damage, falling, large heat transfer, complex pouring material construction, easy cracking and the like of the lining plate of the existing dry quenching coke tank in the prior art, the utility model adopts different pouring materials and changes the structure of the lining plate at different parts of the coke tank to compound the pouring materials into an integral structure, thereby avoiding the defects generated by a straight seam and better solving the problems of easy burning loss, air leakage, falling and large heat loss of the coke tank; and the service life and the heat preservation effect of the coke tank can be improved on the premise of not increasing the cost.
The measures for realizing the aim are as follows:
a coke tank with a self-sealing composite structure mainly comprises a coke inlet section, a storage cylinder section and a coke outlet section; every section comprises metal-back, the anchor assembly and the pouring bed of metal-back inner wall, and it lies in: the coke inlet section and the storage cylinder body section as well as the storage cylinder body section and the coke outlet section are in embedded sealing connection with each other; structure of coke inlet section: a metal mesh layer is fixed on the anchoring piece and is connected with the anchoring piece;
storage cylinder body section structure: a metal mesh layer is fixed on the anchoring piece and is connected with the anchoring piece; a nanometer insulation board with the thickness not more than 8mm is adhered on the metal shell;
the coke outlet section structure is the same as the storage cylinder body section structure; the height of the anchoring piece is not more than two thirds of the thickness of the coke tank with the composite structure.
It is characterized in that: the thickness of the metal shell is 4-6 mm. It is noted that the temperature resistance of the steel plate is not lower than 1000 ℃.
It is characterized in that: the diameter of the anchor is not more than 10 mm.
It is characterized in that: the diameter of the metal wires of the metal mesh layer is not more than 2 mm; the side length of the meshes of the metal mesh layer is 8-20 mm.
It is characterized in that: the nanometer heat-insulation board is adhered to the metal shell through a fireproof adhesive.
It is characterized in that: the number of the coke outlet section along the circumferential direction is not more than 6; the outer side of the outer plate is provided with a hanging piece with a fixing hole, and the hanging piece
Is connected with the tank frame through bolts. Such a structure is favorable to reducing structure weight in the prefab installation process to be favorable to hanging the installation.
It should be noted that:
the service temperature of the refractory castable is not lower than 1300 ℃;
the casting material layer of the coke inlet section has the density of 1.6-1.9 g/cm3The purpose of the light refractory castable is that the pot opening has fast heat dissipation, the temperature of the coke after being loaded is high, the radiant heat is large, the light refractory castable can absorb heat, and the heat insulation performance is good. The coke impact force of the part is small, and light castable can be used as a prefabricated part furnace lining.
The casting material layer of the storage cylinder body section and the coke outlet section adopts the density of 1.91-2.6 g/cm3The semi-heavy refractory castable aims to provide impact force and abrasion to the storage cylinder section and the coke outlet section in the coke loading process, reduce the temperature of the tank body after the coke is unloaded, and quench and rapidly heat, so that the semi-heavy refractory castable is used for 1.91-2.6 g/cm3The semi-heavy refractory castable is used as a prefabricated member furnace lining, has good heat insulation effect, good wear resistance and thermal damage resistance, and can prolong the service life.
The function of the main components of the utility model
The utility model discloses a so adopt to connect the metal mesh layer on anchor assembly is because the pouring material has anchor assembly's support and reinforcement radially, prevents that its fracture from peeling off, and at the circumferencial direction, through the metal mesh layer, can strengthen the intensity and the thermal damage resistance performance of pouring material.
The nanometer insulation board is arranged between the metal shell and the casting material layer of the material storage cylinder body section and the coke outlet section, because the casting material layer cannot be too thick due to the limitation of the weight and the volume of the tank body, the heat conduction is too large, the surface temperature of the metal shell can be increased, the deformation is caused, and the heat loss is also caused; the nano-scale insulation board is adopted, only the insulation board with the thickness not greater than 8mm is needed, the surface temperature of the metal shell can be reduced, and the safety range is below 200 ℃.
Compared with the prior art, the utility model, under the prerequisite that does not increase the cost of manufacture, through the change of focusing a jar structure to can improve the life of burnt jar welt, change cycle is than improving at least 6 months originally, makes the maintenance cost can reduce at least 30% from this, and can reduce the temperature 50~100 ℃ of shell surface.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the storage cylinder section or coke outlet section of FIG. 1;
in the figure: 1-coke inlet section, 2-storage cylinder section, 3-coke outlet section, 4-metal shell, 5-anchoring piece, 6-casting material layer, 7-metal net layer and 8-nano-scale insulation board.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
a coke tank with a self-sealing composite structure is mainly divided into a coke inlet section 1, a storage cylinder section 2 and a coke outlet section 3 on the whole; every section comprises metal casing 4, the anchor assembly 5 and the casting bed 6 of 4 inner walls of metal casing, and it lies in: the coke inlet section 1 and the storage cylinder body section 2, and the storage cylinder body section 3 and the coke outlet section 3 are connected by adopting a concave-convex structure or an embedded connection mode of up-down insertion even if the connection positions are not in a straight slit shape;
structure of coke inlet section 1: a metal mesh layer 7 is fixed on the anchoring piece 5 and is welded with the anchoring piece 5; the casting material layer 6 has the density of 1.6-1.9 g/cm3The light refractory castable with any value can be used, and the use temperature is above 1300 ℃;
2 structures of storage cylinder section: a metal mesh layer 7 is fixed on the anchoring piece 5 and is welded with the anchoring piece 5;a heat insulation plate 8 with the nanometer grade and the thickness of 6mm is stuck on the metal shell 4 by a fire-resistant adhesive; a metal mesh layer 7 is fixed on the anchoring piece 5 and is welded with the anchoring piece 5; the density of the casting material layer 6 is 1.91-2.6 g/cm3Any value of the semi-heavy refractory castable can be used, and the use temperature is above 1300 ℃. The refractory adhesive can be aluminum dihydrogen phosphate or water glass adhesive.
The structure of the coke outlet section 3 is the same as that of the storage cylinder section 2, but the coke outlet section is formed by splicing, namely the coke outlet section is 3 along the circumferential direction; and the outer surface of each outer plate is provided with a bolt hole which is connected with the tank frame through a bolt. Such a structure is favorable to reducing structure weight in the prefab installation process to be favorable to hanging the installation.
The following steps are carried out: the metal shell 4 is made of an A3 steel plate and has the thickness of 5.5 mm; the diameter of a steel wire used for manufacturing the anchoring piece 5 is 8.5mm, the material is stainless steel, the anchoring piece 5 is a Y-shaped or V-shaped anchoring piece, and the height of the anchoring piece is not more than two thirds of the thickness of the coke tank with the composite structure; the diameter of the steel wire used for manufacturing the metal mesh layer 7 is 1.5mm, and the material is stainless steel;
through test and test, the coke tank prepared by the method is tested for 13 months, the phenomena of damage, falling and cracking are not found, the air leakage problem is not generated, the heat loss is reduced from the original surface temperature of 300-400 ℃ of the shell to 180-250 ℃, and the sealing effect is good. According to the situation, the product can be tried for at least 6 months.
The specific embodiments are merely preferred examples and are not intended to limit the embodiments of the present invention.
Claims (6)
1. A coke tank with a self-sealing composite structure mainly comprises a coke inlet section, a storage cylinder section and a coke outlet section; every section comprises metal-back, the anchor assembly and the pouring bed of metal-back inner wall, its characterized in that: the coke inlet section and the storage cylinder body section as well as the storage cylinder body section and the coke outlet section are hermetically connected with each other; structure of coke inlet section: a metal mesh layer is fixed on the anchoring piece and is connected with the anchoring piece;
storage cylinder body section structure: a metal mesh layer is fixed on the anchoring piece and is connected with the anchoring piece; a nanometer insulation board with the thickness not more than 8mm is adhered on the metal shell;
the coke outlet section structure is the same as the storage cylinder body section structure; the height of the anchoring piece is not more than two thirds of the thickness of the coke tank with the composite structure.
2. The coke drum of composite construction having self-sealing of claim 1 wherein: the thickness of the metal shell is 4-6 mm.
3. The coke drum of composite construction having self-sealing of claim 1 wherein: the diameter of the anchor is not more than 10 mm.
4. The coke drum of composite construction having self-sealing of claim 1 wherein: the diameter of the metal wires of the metal mesh layer is not more than 2 mm; the side length of the meshes of the metal mesh layer is 8-20 mm.
5. The coke drum of composite construction having self-sealing of claim 1 wherein: the nanometer heat-insulation board is adhered to the metal shell through a fireproof adhesive.
6. The coke drum of composite construction having self-sealing of claim 1 wherein: the number of the coke outlet section along the circumferential direction is not more than 6; the outer side of the outer plate is provided with a hanging piece with a fixing hole, and the hanging piece is connected with the tank frame through a bolt.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662729A (en) * | 2020-06-17 | 2020-09-15 | 武汉钢铁有限公司 | Composite construction coke jar with self sealss |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662729A (en) * | 2020-06-17 | 2020-09-15 | 武汉钢铁有限公司 | Composite construction coke jar with self sealss |
| CN111662729B (en) * | 2020-06-17 | 2024-07-23 | 武汉钢铁有限公司 | Composite construction coke jar with self sealss |
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