Double-layer roller kiln for firing and drying glazed foamed ceramic plate

Abstract

A double-layer roller kiln for firing and drying glazed foamed ceramic plates is structurally characterized in that a firing kiln is arranged on the upper layer, a drying kiln is arranged on the lower layer, and the drying kiln on the lower layer conducts slow drying through waste heat and smoke of the firing kiln on the upper layer. The basic structure of the firing kiln comprises a smoke exhaust area accounting for 5%-7% of the total length of the kiln, a transition area accounting for 1%-3% of the total length of the kiln, a medium-temperature bottom gun area accounting for 8%-12% of the total length of the kiln, a high-temperature I area accounting for 8%-12% of the total length of the kiln, a high-temperature II area accounting for 8%-12% of the total length of the kiln, a high-temperature transition area accounting for 1%-3% of the total length of the kiln, a quenching area accounting for 1%-3% of the total The length, the outer width and the structural modulus of the drying kiln are consistent with those of the firing kiln, the firing kiln combustion-supporting air pipe is preheated by the drying kiln, and firing kiln flue gas and waste heat are heat sources of the drying kiln.

Description

Technical Field

[0001] The utility model relates to the technical field of glazed foamed ceramic production equipment, in particular to a double-layer roller kiln used for firing and drying glazed foamed ceramic plates. Background Art

[0002] Glazed foamed ceramic panels are made of perlite tailings, granite tailings, industrial solid waste, construction waste, shale, zeolite, bentonite, and river silt as the main raw materials, supplemented by foaming agents, water reducers, foam stabilizers and other additives. After crushing, batching, ball milling, granulation, spreading, drying, glazing, firing, cutting, edging, grooving, chamfering and other process, they are made into lightweight plate-shaped foamed ceramic products with thermal insulation, heat insulation, sound insulation, fire prevention and decorative functions.

[0003] During the drying and firing process of the glazed foamed ceramic plate, relatively independent roller drying kilns and firing kilns are generally used. The drying roller kiln utilizes the waste heat of the firing roller kiln. The waste heat of the firing kiln is transported to the drying kiln through a pipeline and then transported to each working structure through an air distributor.

[0004] The problem with the above process equipment is that the heat dissipation of pipes causes the temperature of the entire workshop to be higher than 35°C all year round, which not only causes energy waste, but also makes the workers work in a high-temperature heat radiation environment all year round, affecting their health. At the same time, a large number of pipeline routes not only consume materials, but also cause safety hazards. Summary of the invention

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a double-layer roller kiln for firing and drying glazed foamed ceramic plates is provided.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A double-layer roller kiln for firing and drying glazed foamed ceramic panels has the structural characteristics of an upper layer being a firing kiln and a lower layer being a drying kiln, wherein the lower layer drying kiln utilizes the waste heat and flue gas of the upper layer firing kiln for slow drying.

[0008] Furthermore, the basic structure of the firing kiln includes a smoke exhaust zone accounting for 5% to 7% of the total length of the kiln, a transition zone of 1% to 3%, a medium-temperature bottom gun zone of 8% to 12%, a high-temperature I zone of 8% to 12%, a high-temperature II zone of 8% to 12%, a high-temperature transition zone of 1% to 3%, a rapid cooling zone of 1% to 36%, a slow cooling zone of 32% to 36% and a tail cooling zone of 18% to 20%.

[0009] Furthermore, the basic structure of the firing kiln is composed of a box structure with a fixed modulus, reserved holes in the box structure, a transmission system, a combustion system, an air supply and exhaust system, and a control system.

[0010] Furthermore, the box structure includes a cavity composed of a steel structure, a protective panel, a thermal insulation material, and a refractory material.

[0011] Furthermore, the reserved holes include burners, fire peek holes, drive roller insertion holes, accident handling holes, entry holes, temperature measurement holes and smoke exhaust holes.

[0012] Furthermore, the length, outer width and structural modulus of the drying kiln are consistent with those of the firing kiln. Since the box structure of the drying kiln is only a cavity composed of steel structure, protective panels and insulation materials, the inner width is larger than that of the firing kiln. The combustion-supporting air duct of the firing kiln is preheated by the drying kiln, and the smoke and waste heat of the firing kiln are the heat sources of the drying kiln.

[0013] Beneficial Effects

[0014] The beneficial effects of the above technical solution are:

[0015] The technical solution provided by the utility model can make full use of preheating and reduce heat dissipation; at the same time, it can save land, building area, and kiln structural materials, and provides an energy-saving, material-saving, and labor-saving approach for the production of glazed foamed ceramic panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 .The basic structure of the double-layer roller kiln for firing and drying glazed foamed ceramic panels;

[0017] Figure 2 .The box structure of the exhaust area and transition area of ​​the double-layer roller kiln for firing and drying glazed foamed ceramic panels;

[0018] Figure 3 . The box structure of the medium temperature bottom gun zone, high temperature zone I, high temperature zone II and high temperature transition zone of the double-layer roller kiln for firing and drying glazed foamed ceramic panels;

[0019] Figure 4 .The box structure of the rapid cooling zone of the double-layer roller kiln for firing and drying glazed foamed ceramic panels;

[0020] Figure 5 .The box structure of the slow cooling zone of the double-layer roller kiln for firing and drying glazed foamed ceramic panels;

[0021] Figure 6 .The box structure of the tail cooling zone of the double-layer roller kiln for firing and drying glazed foamed ceramic panels; DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0023] Example 1

[0024] A double-layer roller kiln for firing and drying glazed foamed ceramic panels has the structural characteristics of an upper layer being a firing kiln and a lower layer being a drying kiln, wherein the lower layer drying kiln utilizes the waste heat and flue gas of the upper layer firing kiln for slow drying.

[0025] Furthermore, the basic structure of the firing kiln includes a total length of 63 meters, a single section length of 2100 mm, 30 sections, an outer width of 3300 mm, an inner width of 2400 mm, wherein sections 1 to 4 are smoke exhaust areas, section 5 is a preheating transition zone, sections 6 to 7 are medium-temperature bottom gun areas, sections 8 to 11 are high-temperature I areas, sections 12 to 15 are high-temperature II areas, section 16 is a rapid cooling transition area, section 17 is a rapid cooling area, sections 18 to 24 are slow cooling areas, and sections 25 to 30 are tail cooling areas.

[0026] Furthermore, the basic structure of the drying kiln includes a total length of 63 meters, a single section length of 2100 mm, 30 sections, an outer width of 3300 mm, an inner width of 3000 mm, and sections 1 to 7 have hot air outlets on the lower side of the roller.

[0027] Furthermore, the box structure of the firing kiln is composed of a box structure with a fixed module, reserved holes, a transmission system, a combustion system, an air supply and exhaust system, and a control system.

[0028] Furthermore, the box structure includes a cavity composed of a steel structure, a protective panel, a thermal insulation material, and a refractory material.

[0029] Furthermore, the reserved holes include burners, fire peek holes, drive roller insertion holes, accident handling holes, entry holes, temperature measurement holes, and smoke extraction holes.

[0030] Accident handling holes: Two accident handling holes are set under each unit of the whole kiln roller, staggered on both sides of the kiln;

[0031] ②Observation hole: can observe the operation of the product in the kiln; symmetrical distribution on the left and right

[0032] Preheating section; oxidation section; firing section; 1 for every 2 sections, specification is Φ60mm porcelain tube

[0033] Rapid cooling section: 1 for every 2 sections, specification: □100×50, with hinged door for easy opening and closing, pipe diameter: Φ57mm

[0034] Maintenance access hole: An inspection access hole is set at the passive side of the smoke exhaust transition zone and the rapid cooling zone, which is convenient and quick for maintenance personnel to enter and exit the kiln for maintenance.

[0035] Furthermore, the transmission system adopts 45° bevel gear transmission (the gun loading section and the rapid cooling section are differential transmission), and the jacket assembly adopts a cast aluminum single-hole seat: each gear transmission motor is 0.75KW, and a total of 10 transmission motors are used; the transmission motor and the transmission main shaft are connected with a horizontal chain, and there is one motor for two sections in the rapid cooling section.

[0036] Furthermore, the transmission roller has a rod diameter of Φ50mm and a rod spacing of 70mm. Sections 01 to 15 use Φ50mm high-temperature and high-strength ceramic rollers, sections 16-17 use Φ50mm rapid cooling section special bending-resistant ceramic rollers, sections 18 to 24 use Φ50mm high-temperature and high-strength ceramic rollers, and sections 25 to 30 use Φ50mm steel rollers.

[0037] Furthermore, the double-layer firing-drying integrated kiln with a length of 63 meters and an outer width of 3300 mm can simultaneously dry 5 pieces of single-row 448mm×618mm blanks and fire 2 pieces of 600mm×900mm products. The daily output of a single kiln can reach 500m 2 .

[0038] Example 2

[0039] A double-layer roller kiln for firing and drying glazed foamed ceramic panels has the structural characteristics of an upper layer being a firing kiln and a lower layer being a drying kiln, wherein the lower layer drying kiln utilizes the waste heat and flue gas of the upper layer firing kiln for slow drying.

[0040] Furthermore, the basic structure of the firing kiln includes a total length of 285.6 meters, a single section length of 2100 mm, 136 sections, an outer width of 3300 mm, an inner width of 2400 mm, wherein sections 1 to 8 are smoke exhaust areas, sections 9 to 12 are preheating transition areas, sections 13 to 23 are medium-temperature bottom gun areas, sections 24 to 39 are high-temperature I areas, sections 40 to 55 are high-temperature II areas, sections 56 to 59 are rapid cooling transition areas, sections 60 to 63 are rapid cooling areas, sections 64 to 112 are slow cooling areas, and sections 113 to 136 are tail cooling areas.

[0041] Furthermore, the basic structure of the drying kiln includes a total length of 285.6 meters, a single section length of 2100 mm, 136 sections, an outer width of 3300 mm, an inner width of 3000 mm, and sections 1 to 33 have hot air outlets on the lower side of the roller.

[0042] Furthermore, the box structure of the firing kiln is composed of a box structure with a fixed module, reserved holes, a transmission system, a combustion system, an air supply and exhaust system, and a control system.

[0043] Furthermore, the box structure includes a cavity composed of a steel structure, a protective panel, a thermal insulation material, and a refractory material.

[0044] Furthermore, the reserved holes include burners, fire peek holes, drive roller insertion holes, accident handling holes, entry holes, temperature measurement holes, and smoke extraction holes.

[0045] Accident handling holes: Two accident handling holes are set under each unit of the whole kiln roller, staggered on both sides of the kiln;

[0046] ②Observation hole: can observe the operation of the product in the kiln; symmetrical distribution on the left and right

[0047] Preheating section; oxidation section; firing section; 1 for every 2 sections, specification is Φ60mm porcelain tube

[0048] Rapid cooling section: 1 for every 2 sections, specification: □100×50, with hinged door for easy opening and closing, pipe diameter: Φ57mm

[0049] Maintenance access hole: An inspection access hole is set at the passive side of the smoke exhaust transition zone and the rapid cooling zone, which is convenient and quick for maintenance personnel to enter and exit the kiln for maintenance.

[0050] Furthermore, the transmission system adopts 45° bevel gear transmission (the gun loading section and the rapid cooling section are differential transmission), and the jacket assembly adopts a cast aluminum single-hole seat: each gear transmission motor is 0.75KW, and a total of 10 transmission motors are used; the transmission motor and the transmission main shaft are connected with a horizontal chain, and there is one motor for two sections in the rapid cooling section.

[0051] Furthermore, the transmission roller has a rod diameter of Φ60mm and a rod pitch of 75mm. Sections 01 to 59 use Φ60mm high-temperature and high-strength ceramic rollers, sections 60-63 use Φ60mm rapid cooling section special bending-resistant ceramic rollers, sections 64 to 112 use Φ60mm high-temperature and high-strength ceramic rollers, and sections 113 to 136 use Φ60mm steel rollers.

[0052] Furthermore, the 136-meter-long, 3,300-mm-wide double-layer firing-drying integrated kiln can simultaneously dry five single-row 448-mm×618-mm green bodies and fire two 600-mm×900-mm products. The daily output of a single kiln can reach 2,500 m 2 .

[0053] Example 3

[0054] A double-layer roller kiln for firing and drying glazed foamed ceramic panels has the structural characteristics of an upper layer being a firing kiln and a lower layer being a drying kiln, wherein the lower layer drying kiln utilizes the waste heat and flue gas of the upper layer firing kiln for slow drying.

[0055] Furthermore, the basic structure of the firing kiln includes a total length of 487.2 meters, a single section length of 2100 mm, 232 sections, an outer width of 3600 mm, an inner width of 2700 mm, wherein sections 1 to 12 are smoke exhaust areas, sections 13 to 17 are preheating transition areas, sections 18 to 44 are medium-temperature bottom gun areas, sections 45 to 73 are high-temperature I areas, sections 74 to 101 are high-temperature II areas, sections 102 to 106 are rapid cooling transition areas, sections 107 to 111 are rapid cooling areas, sections 112 to 195 are slow cooling areas, and sections 196 to 232 are tail cooling areas.

[0056] Furthermore, the basic structure of the drying kiln includes a total length of 487.2 meters, a single section length of 2100 mm, 232 sections, an outer width of 3600 mm, an inner width of 3300 mm, and sections 1 to 56 have hot air outlets on the lower side of the roller.

[0057] Furthermore, the box structure of the firing kiln is composed of a box structure with a fixed module, reserved holes, a transmission system, a combustion system, an air supply and exhaust system, and a control system.

[0058] Furthermore, the box structure includes a cavity composed of a steel structure, a protective panel, a thermal insulation material, and a refractory material.

[0059] Furthermore, the reserved holes include burners, fire peek holes, drive roller insertion holes, accident handling holes, entry holes, temperature measurement holes, and smoke extraction holes.

[0060] Accident handling holes: Two accident handling holes are set under each unit of the whole kiln roller, staggered on both sides of the kiln;

[0061] ②Observation hole: can observe the operation of the product in the kiln; symmetrical distribution on the left and right

[0062] Preheating section; oxidation section; firing section; 1 for every 2 sections, specification is Φ60mm porcelain tube

[0063] Rapid cooling section: 1 for every 2 sections, specification: □100×50, with hinged door for easy opening and closing, pipe diameter: Φ57mm

[0064] Maintenance access hole: An inspection access hole is set at the passive side of the smoke exhaust transition zone and the rapid cooling zone, which is convenient and quick for maintenance personnel to enter and exit the kiln for maintenance.

[0065] Furthermore, the transmission system adopts 45° bevel gear transmission (the gun loading section and the rapid cooling section are differential transmission), and the jacket assembly adopts a cast aluminum single-hole seat: each gear transmission motor is 0.75KW, and a total of 10 transmission motors are used; the transmission motor and the transmission main shaft are connected with a horizontal chain, and there is one motor for two sections in the rapid cooling section.

[0066] Furthermore, the transmission roller has a rod diameter of Φ65mm and a rod pitch of 80mm. Sections 01 to 106 use Φ65mm high-temperature and high-strength ceramic rollers, sections 107-111 use Φ65mm rapid cooling section special bending-resistant ceramic rollers, sections 112 to 195 use Φ65mm high-temperature and high-strength ceramic rollers, and sections 196 to 232 use Φ65mm steel rollers.

[0067] Furthermore, the double-layer firing-drying integrated kiln with a length of 487.2 meters and an outer width of 3300 mm can simultaneously dry 5 pieces of single-row 618mm×800mm blanks and fire 2 pieces of 900mm×1200mm products. The daily output of a single kiln can reach 7000m 2 .

[0068] The method for recycling waste glazed foamed ceramic panels provided by the present invention can effectively reduce the generation of solid waste in the production process of glazed foamed ceramic panels and the pollution to the environment to a certain extent; the method can also provide hollow thick plates and lines.

[0069] In addition, it should be understood that after reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A double-layer roller kiln for firing and drying glazed foamed ceramic panels, characterized in that the upper layer The upper layer is a firing kiln, and the lower layer is a drying kiln. The lower layer of the drying kiln uses the waste heat and flue gas from the upper layer of the firing kiln to perform slow drying. The basic structure of the firing kiln includes a smoke exhaust zone accounting for 5% to 7% of the total length of the kiln, a transition zone of 1% to 3%, a medium-temperature bottom gun zone of 8% to 12%, a high-temperature I zone of 8% to 12%, a high-temperature II zone of 8% to 12%, a high-temperature transition zone of 1% to 3%, a rapid cooling zone of 1% to 3%, a slow cooling zone of 32% to 36% and a tail cooling zone of 18% to 20%; The basic structure of the firing kiln consists of a box structure with a fixed module, reserved holes in the box structure, a transmission system, a combustion system, an air supply and exhaust system, and a control system; The box structure includes a cavity composed of steel structure and protective panels, thermal insulation materials, and refractory materials; The reserved holes include burner, fire peep hole, transmission roller insertion hole, accident handling hole, entry hole, temperature measurement hole and smoke extraction hole; The length, outer width and structural modulus of the drying kiln are consistent with those of the firing kiln. Since the box structure of the drying kiln is only a cavity composed of steel structure, protective panels and insulation materials, the inner width is larger than that of the firing kiln. The combustion-supporting air duct of the firing kiln is preheated by the drying kiln, and the smoke and waste heat of the firing kiln are the heat sources of the drying kiln.

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