CN111504062A - Waste heat utilization system for balancing temperature field of cooling section of kiln and using method thereof - Google Patents
Waste heat utilization system for balancing temperature field of cooling section of kiln and using method thereof Download PDFInfo
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- CN111504062A CN111504062A CN202010366521.4A CN202010366521A CN111504062A CN 111504062 A CN111504062 A CN 111504062A CN 202010366521 A CN202010366521 A CN 202010366521A CN 111504062 A CN111504062 A CN 111504062A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
- F27B2009/124—Cooling
- F27B2009/126—Cooling involving the circulation of cooling gases, e.g. air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The maximum specification of a single product is 3200mm 1600mm, and the waste heat utilization system improves the internal temperature field of the existing rapid cooling and slow cooling section of the kiln, avoids the direct cold air blowing of a rapid cooling zone on the surface and the bottom of a brick for cooling and correspondingly improves the temperature of the slow cooling section. The cooling gradients of the product in the quenching section, the slow cooling section and the strong cooling section are adjusted to improve the toughness of the sintered product, so that the subsequent medium opening of the product does not generate medium cracking. The product quality is improved, and meanwhile, effective waste heat utilization is carried out.
Description
Technical Field
The invention relates to the field of building ceramic tiles, in particular to a manufacturing device of a ceramic building decoration material and a using method thereof.
Background
Most of the existing ceramic roller kiln quenching air sources directly utilize air, and the quenching section smoke with too low temperature can not rapidly balance the temperature field after reaching slow cooling, thereby influencing the toughness and brick shape of the ceramic tile passing through the section, and causing the defects of deformation, brick cracking and the like. Meanwhile, because the temperature field of the slow cooling section is not balanced enough and the local temperature is not enough, a spray gun is required to be arranged at the slow cooling section for ignition to perform temperature compensation under the normal condition, so that the aim of adjusting the temperature field of the slow cooling section according to a temperature curve is fulfilled.
The regulation belongs to the traditional pure manual operation, and a great deal of energy of kiln managers needs to be expended to arrange professionals for tracking and checking; time consumption, labor consumption, low energy efficiency and ineffective improvement of product quality.
In the quenching equipment of the roller kiln in the prior art:
the utility model discloses a utility model patent that publication number is CN 201867076U discloses a curved quench tube, can do benefit to the temperature of nimble cross-section adobe surface in the regulation kiln reliably through the body of buckling of "L" type to reduce the difference in temperature, thereby improve the deflection and the roughness of wall ceramic tile, propose that the internal adjustment of quench section kiln is pointed and quench "L" type body of buckling carries out effective cooling to the ceramic tile through this section.
Utility model patent that publication number is CN 206037716U discloses a kiln rapid cooling wind system, can realize the single adjustment of three brick roughness respectively to can adjust the amount of wind through the gate valve, control the dynamics of ceramic tile roughness adjustment.
The 2 modes are used for pertinently solving the quenching problem of the quenching section, and belong to a quenching pipeline tail end system. The relative air supply amount is less, and simultaneously, the air supply resistance is increased due to the bending of the pipeline, so that the kiln is not suitable for large-specification ceramic plates, particularly kilns of 3200mm 1600mm and 2400mm 1200 ultra-large-specification thin plate bricks.
Disclosure of Invention
In view of the defects in the prior art, the invention innovatively provides a waste heat utilization system for balancing the temperature field of the cooling section of the kiln and a use method thereof, and a 304 stainless steel pipeline is used for providing clean hot air with the temperature of more than 100 ℃ for the quenching section of the kiln to cool the surface and the bottom of a high-temperature fired ceramic tile and has an obvious effect of assisting in controlling the shape of the ceramic tile. Especially when 3200mm 1600mm, 2400mm 1200 super large specification sheet brick body temperature is very high when firing the excessive quenching, and the brick bottom surface receives the conventional cold wind influence that the rapid cooling tuber pipe supplied out can make the brick bottom surface cool off too fast suddenly and lead to the brick body to go out after the kiln very fragile not have toughness, use rust-resistant 304 stainless steel pipeline with 100 ℃ clean air to cool off super large board can solve above problem well to improved the cooling zone (quench zone, slow cooling section and forced cooling section) temperature curve, can solve the not enough common problem of slow cooling section temperature well through regulation and control, alleviateed kiln operating personnel's intensity of labour.
Clean hot air after heat exchange is carried out through the kiln waste heat utilization heat exchange system, and the cold air is sucked through the cold air inlet, so that the negative influence on a cooling zone caused by the conventional emergency cold air is avoided, the redundant hot air can be supplied to the kiln combustion-supporting air system through the kiln combustion-supporting air transition pipe, and the purposes of saving energy and reducing consumption are achieved. The invention provides more and better regulation and control methods for the regulation and control of the cooling zone of the kiln, and simultaneously effectively utilizes the waste heat to reduce the energy consumption of the kiln, which is the aim of novelty, creativity and practicability.
The technical means adopted by the invention are as follows:
a waste heat utilization system for balancing a temperature field of a cooling section of a kiln and a using method thereof are disclosed, the maximum specification of a single product is 3200mm 1600mm, the waste heat utilization system for the temperature field of the cooling section of the roller kiln uses a 304 stainless steel pipeline to provide clean hot air with the temperature of more than 100 ℃ for a quench section of the kiln to cool the surface of a high-temperature fired ceramic tile and assist in controlling the shape of the ceramic tile, and the regulation and control effect is obvious; the existing kiln quenching system is improved, the quenching zone is prevented from being directly cooled on the brick surface by cold air, the temperature of a slow cooling section is correspondingly increased, and the cooling gradient of a product in a quenching section (enabling a blank body to be solidified and transformed in a liquid phase), a slow cooling section (enabling a blank body to be transformed in a quartz crystal form) and a strong cooling section (enabling the blank body to be gradually solidified) is adjusted so as to improve the toughness of the product after sintering, and the subsequent medium opening of the product does not generate medium cracking.
Preferably, the air source of the quenching pipeline is clean hot air after heat exchange of the kiln waste heat utilization heat exchange system, and meanwhile, natural cold air supplemented through a cold air inlet is used as an auxiliary air source.
Preferably, the first bimetal thermometer displays the temperature of hot air which is subjected to heat exchange by the kiln waste heat utilization heat exchange system and is mixed with cold air entering the cold air inlet on site.
Preferably, the second bimetal thermometer displays the temperature of hot air which is distributed through a cold air inlet and then is input into an air supply system of a lower pipeline of a roller of a quenching section of the kiln through a quenching fan on site.
Preferably, the cold air inlet is provided with an air filter.
Preferably, each branch of the quenching air pipeline is provided with a high-temperature resistant flashboard.
Preferably, the quenching fan is a D-type water cooling fan.
Preferably, the intelligent temperature control system of the quenching section comprises three temperature control points of quenching belt on-roller thermocouples A1 and A3 and a roller under-roller thermocouple A2.
Preferably, the intelligent temperature control system of the quenching section comprises an intelligent temperature control instrument, a digital converter and a frequency converter in a temperature control cabinet.
Preferably, the kiln quench zone air supply system comprises a kiln quench zone roller upper pipeline air supply system and a kiln quench zone roller lower pipeline air supply system.
Preferably, a pipeline air supply system is arranged on a roller of the kiln quenching section) and a pipeline air supply system is arranged below the roller of the kiln quenching section, and a first capsule pressure gauge and a second capsule pressure gauge are arranged at the tail ends of main pipes on the roller and the driven two sides below the roller of the kiln quenching section air supply system.
The waste heat utilization system for equalizing the temperature field of the cooling section of the kiln and the use method thereof comprise the following steps:
⑴, the used pipeline system is made of anti-corrosion 304 material (including pipeline, flashboard and related parts), which improves the heat efficiency and service life of the pipeline system, reduces the defect of extra dirty caused by high temperature corrosion of the pipeline, reduces the maintenance cost of the kiln pipeline, and ensures to provide high temperature clean air source for the rapid cooling of the kiln in the first time.
⑵, the temperature of the clean hot air after heat exchange of the kiln waste heat utilization heat exchange system is 220-280 ℃, and the clean hot air is used for the kiln quenching air and is used for supplying hot air to the kiln combustion-supporting air system through the kiln combustion-supporting air transition pipe, so that the energy-saving and consumption-reducing effects are relatively high.
⑶, a first bimetal thermometer is arranged on a pipeline between the waste heat utilization heat exchange system of the kiln and the quenching fan, and a second bimetal thermometer is arranged on a connecting pipeline between the quenching fan and the air supply system of the pipeline below the roller of the quenching section of the kiln, so that the temperature of hot air at the inlet and the outlet of the quenching fan can be monitored on site;
⑷, the natural cold air supplemented by the cold air inlet is provided with an air filter, the filter is a cube and consists of a four-side square filter screen, a closed bottom plate and an air outlet, the design is simple and light, the structure is compact, the height of the box body is low, the universality is good, the installation and the daily maintenance are convenient, the cold air sucked through the cold air inlet is ensured not to be mixed with impurities, and the clean air source is kept.
⑸ high temperature resistant flashboards are arranged at each branch of the quenching air pipeline, so that the proportion of hot air and cold air input by the quenching fan and the air output to each quenching air pipe can be conveniently adjusted by adjusting the flashboards on the corresponding pipelines as required.
⑹, thermocouples A1 and A3 are arranged on a roller of a kiln quench zone, a thermocouple A2 is arranged below the roller, and an intelligent temperature control system of the quench zone is formed by three temperature control points, an intelligent temperature control instrument, a digital converter, a frequency converter and a quench fan in a temperature control cabinet.
⑺, the quenching fan is D-type water cooling fan, the fan is D-type, the motor and the fan are connected and driven by elastic coupling, the fan is composed of impeller, casing, air inlet, adjusting door and driving part, the water cooling device of the fan is cooled by common industrial tap water, the water pressure is 0.3-0.5MPa, and the water quantity is adjusted to keep the temperature of the bearing not higher than 70 ℃.
⑻, the automatic temperature control system for the kiln cooling section is provided with two quenching fans, one of which supplies quenching air to the air supply system on the quenching section roller of the kiln, and the other supplies quenching air to the air supply system on the quenching section roller of the kiln, thus ensuring the operation requirements of different air volumes of the upper and lower pipelines of the air supply system of the quenching section of the kiln.
⑼, mixing clean hot air after heat exchange of the kiln waste heat utilization heat exchange system with the temperature of 220-280 ℃ with clean air to form rapid cooling air with the temperature of more than 100 ℃, and conveying the rapid cooling air to the rapid cooling air supply system of the roller kiln for use through a rapid cooling fan.
The invention has the following beneficial effects:
firstly, the invention improves the temperature in the roller kiln of the quenching zone, and is beneficial to adjusting the liquid phase solidification and transformation of the blank in the quenching zone; the rapid cooling air enters the slow cooling section after passing through the rapid cooling section, so that the cooling curve of the slow cooling section is correspondingly improved, and the conversion of the quartz crystal form of the blank body of the slow cooling section and the gradual solidification of the blank body of the strong cooling section are facilitated. The temperature of the cooling zone is intelligently controlled to improve the cooling gradient, so that the toughness of the sintered product is improved, the subsequent dielectric opening of the product does not generate dielectric cracking, and the high-class rate of the product is improved.
Secondly, the used pipeline system is made of anti-corrosion 304 materials (including pipelines, flashboards and related parts), so that the heat efficiency and the service life of the pipeline system are improved, the defect of extra dirt falling caused by high-temperature corrosion of the pipelines is reduced, and the maintenance cost of the kiln pipeline is reduced; the natural cold air supplemented by the cold air inlet is provided with an air filter. The filter is a cube, comprises square filter screen on four sides + closed bottom plate + air outlet, and the design is succinct light, and compact structure, the box height is low, and the commonality is good, is convenient for installation and routine maintenance, ensures that the cold wind of inhaling through the cold wind import is not sneaked into impurity, keeps clean wind regime.
Thirdly, the hot air of the kiln waste heat utilization heat exchange system can be used as the air source of the quenching pipeline and can be supplied to the kiln combustion-supporting air pipeline through the kiln combustion-supporting air transition pipe to be used as the combustion-supporting air. The temperature of the slow cooling section and the strong cooling section is correspondingly increased while the rapid cooling zone is prevented from directly blowing cold air to cool the brick surface, the temperature curve of the cooling zone is improved, the operation of igniting and supplementing the temperature of a spray gun arranged on the slow cooling zone of a general kiln is omitted, and the heat efficiency of the kiln is improved while the energy-saving and consumption-reducing effects are stronger.
Fourthly, the power line and the signal control line of the electrical control part are separately arranged in a wire box, the quality of an electrical product is reliable, the electrical product is durable and has low failure rate, the wiring of the box is separated, the signal interference between the lines is avoided, the intelligent control operation is ensured to be accurate and stable, and the failure rate is zero.
Fifthly, the high-temperature-resistant flashboards are arranged at the branches of the quenching air pipeline, and two D-type water cooling fans are arranged at the same time, wherein one fan supplies quenching air to the air supply system of the upper pipeline of the quenching section roller of the kiln, and the other fan supplies quenching air to the air supply system of the lower pipeline of the quenching section roller of the kiln, so that the operation requirements of different air volumes of the upper pipeline and the lower pipeline of the quenching section air supply system of the kiln are met. The ratio of the hot air and the cold air input by the quenching fan and the air output to each quenching air pipe can be conveniently adjusted by adjusting the flashboards on the corresponding pipelines as required, the pipeline air pressure can be effectively controlled by adjusting the running frequency of the fan, the pipeline pressure of the corresponding quenching part of the kiln can be controlled in a targeted manner, and the product cooling effect of the quenching air can be optimized.
Sixthly, the positions A1 and A2 are key nodes for controlling the low-temperature rapid conversion of the quartz crystal form of the product, and A3 is a temperature control point at the tail of the quenching belt. The three temperature control points realize automatic temperature control through the intelligent instrument, and the operation is convenient, simple and feasible.
Seventh, the quenching fan is a D-type water cooling fan: the transmission mode of the fan is D type, and the connection of the motor and the fan adopts elastic coupling connection transmission; the fan consists of an impeller, a shell, an air inlet, an adjusting door and a transmission part; the water cooling device of the fan is cooled by common industrial tap water, the water pressure is 0.3-0.5MPa, and the water quantity is adjusted to keep the temperature of the bearing not to exceed 70 ℃.
⑴ the impeller is made of high-quality steel and welded between the arc conic cover and the flat wheel disc, and the impeller is corrected by dynamic balance, so it has the advantages of smooth running, high strength and wear resistance, and long service life.
⑵ the casing is made of steel plates welded into volute casing, and the parts are connected by bolts.
⑶ the drive group is composed of main shaft made of high-quality steel and lubricated by rolling bearing, two independent pillow-type bearing boxes, and metal sheath thermometer and oil level indicator installed on the bearing boxes.
The fan has the advantages of stable operation, higher strength and wear resistance, simple maintenance, longer service life, energy conservation, environmental protection and high temperature resistance.
The present invention and the method thereof will be better described with reference to the following examples.
Brief description of the drawings
FIG. 1 is a schematic diagram of a waste heat utilization system for equalizing a temperature field of a cooling section of a kiln.
FIG. 2 is a schematic structural diagram of a pipeline air supply system on a roller of a kiln quench zone, which is overlooked by the invention.
FIG. 3 is a schematic structural view of a kiln quench section lower roller pipeline air supply system in the bottom view of the invention.
A quench zone
B slow cooling section
C forced cooling section
1 kiln combustion-supporting air transition pipe
2 first bellows pressure gauge
4 second bellows pressure gauge
3 kiln quench zone roller top tube way air supply system
5 kiln quench zone roller lower pipeline air supply system
6 second bimetal thermometer
10 first bimetal thermometer
7 quench zone intelligence temperature control system
8 cold air inlet
9 quenching fan
11 kiln waste heat utilization heat transfer system.
Detailed Description
The following detailed description of the waste heat utilization system for equalizing the temperature field of the cooling section of the kiln and the use method thereof according to the present invention with reference to the accompanying drawings and preferred embodiments thereof will be made as follows:
referring to fig. 1, a waste heat utilization system of a kiln cooling zone temperature field according to the present invention is shown, wherein clean hot air after heat exchange by a kiln waste heat utilization heat exchange system 11 is supplied to a kiln quench zone on-roller pipeline air supply system 3 and a kiln quench zone off-roller pipeline air supply system 5 via a quench blower 9 to cool the surface of a high-temperature fired ceramic tile and to assist in controlling the regulation of the tile shape, wherein a represents a quench zone, B represents a slow cooling zone, C represents a strong cooling zone, 1 represents a kiln combustion-supporting air transition pipe, 2 represents a first capsule pressure gauge and 4 represents a second capsule pressure gauge, 3 represents a kiln quench zone on-roller pipeline air supply system, 5 represents a kiln zone off-roller pipeline air supply system, 6 represents a second bimetal thermometer and 10 represents a first bimetal thermometer, and 7 represents an intelligent temperature control system, 8 denotes a cold air inlet, 9 denotes a quenching fan, 11 denotes a kiln waste heat utilization heat exchange system, and T-shaped denotes a plurality of flashboards.
Referring to fig. 2, a plan view of a kiln quench zone on-roller air supply system according to the present invention is shown, in which 1 is a kiln combustion air transition pipe, 2 is a first capsule pressure gauge, 3 is a kiln quench zone on-roller air supply system, 5 is a kiln quench zone off-roller air supply system, 6 is a second bimetal thermometer, 10 is a first bimetal thermometer, 7 is a quench zone intelligent temperature control system, 8 is a cold air inlet, 9 is a quench fan, and 11 is a kiln waste heat utilization heat exchange system.
Referring to fig. 3, a top view of the air supply system of the lower roller of the kiln quenching section is shown, and as can be seen, 4 is a second capsule pressure gauge, and 5 is the air supply system of the lower roller of the kiln quenching section.
The invention provides a waste heat utilization system for balancing a temperature field of a cooling section of a kiln, which is arranged at the cooling section of a roller kiln, wherein a roller way is arranged in the cooling section, and is sequentially divided into a quenching section A, a slow cooling section B and a strong cooling section C, and is characterized in that the waste heat utilization system comprises a kiln combustion-supporting air transition pipe 1, a kiln quenching section roller upper pipeline air supply system 3, a kiln quenching section roller lower pipeline air supply system 5, a quenching section intelligent temperature control system 7 and a kiln waste heat utilization heat exchange system 11; wherein the intelligent temperature control system 7 of the quenching section is connected with a quenching fan 9, and the quenching fan 9 is connected with a cold air inlet 8; the intelligent temperature control system 7 of the quenching section can also be provided with three temperature control points of thermocouples A1 and A3 on the roller and a thermocouple A2 under the roller according to requirements, and can also be increased or decreased according to requirements.
The quenching fan 9 is also connected with a kiln combustion-supporting air transition pipe 1, a kiln quenching section roller upper pipeline air supply system 3 and a kiln quenching section roller lower pipeline air supply system 5, wherein the kiln quenching section roller upper pipeline air supply system 3 is arranged above a quenching section, and the kiln quenching section roller lower pipeline air supply system 5 is arranged below the quenching section; the kiln waste heat utilization heat exchange system 11 is connected with a quenching fan.
The quenching fan can be a D-type water cooling fan; the quenching fan is two, and pipeline air supply system on one connects kiln quench zone roller, and pipeline air supply system under another connects kiln quench zone roller, and two quenching fans are unified to be connected the cold wind import, and the cold wind import sets up air cleaner. The transmission mode of the fan is D type, and the connection of the motor and the fan adopts elastic coupling connection transmission; the fan is composed of an impeller, a shell, an air inlet, an adjusting door and a transmission part, and is the conventional common equipment.
Quench zone air feed system contains pipeline air feed system 3, pipeline air feed system 5 under the kiln quench zone roller on the kiln quench zone roller, and first bellows manometer 2 is connected to pipeline air feed system 3 on the kiln quench zone roller, and second bellows manometer 4 is connected to pipeline air feed system 5 under the kiln quench zone roller. A pressure gauge can also be added at a proper position according to requirements.
The kiln waste heat utilization heat exchange system 11 is formed by suspending a row of heat-resistant stainless steel seamless tubes with the diameter of 200mm and the wall thickness of 2mm on the top of a kiln in parallel.
A first bimetal thermometer 10 is arranged on a pipeline between a kiln waste heat utilization heat exchange system 11 and a quenching fan 9, and a second bimetal thermometer 6 is arranged on a connecting pipeline between the quenching fan 9 and a kiln quenching section roller lower pipeline air supply system 5, so that the temperature of hot air at an inlet and an outlet of the quenching fan can be monitored on site conveniently. A thermometer can also be added on the pipeline according to the requirement.
The kiln quench section roller upper pipeline air supply system 3 and the kiln quench section roller lower pipeline air supply system 5 are provided with branches, and high-temperature resistant flashboards are arranged at the branches.
The invention relates to a use method of a waste heat utilization system for balancing a temperature field of a cooling section of a kiln, wherein the waste heat utilization heat exchange system of the kiln is used for conveying clean hot air after heat exchange, the temperature is 220-280 ℃, and the hot air is supplied to a combustion-supporting air system of the kiln through a combustion-supporting air transition pipe and is used outside the use of quenching air of the kiln; a first bimetal thermometer arranged on a pipeline between the kiln waste heat utilization heat exchange system and a quenching fan, and a second bimetal thermometer arranged on a connecting pipeline of the quenching fan and a kiln quenching section roller lower pipeline air supply system, wherein the temperature of hot air at an inlet and an outlet of the quenching fan is monitored on site; the natural cold air supplemented by the cold air inlet is provided with an air filter, so that the cold air sucked through the air inlet is ensured not to be mixed with impurities, and a clean air source is kept; high-temperature-resistant flashboards are arranged at each branch of the quenching air pipeline, so that the proportion of hot air and cold air input by a quenching fan and the air output to each quenching air pipe can be conveniently adjusted by adjusting the flashboards on the corresponding pipelines as required; the quenching fan adopts a D-type water cooling fan, a fan water cooling device adopts common industrial tap water for cooling, the water pressure is 0.3-0.5MPa, and the water quantity is adjusted to keep the temperature of the bearing not to exceed 70 ℃; the waste heat utilization system for balancing the temperature field of the kiln cooling section is provided with two quenching fans, one quenching fan supplies quenching air to the air supply system on the quenching section roller of the kiln, and the other quenching fan supplies quenching air to the air supply system on the lower quenching section roller of the kiln, so that the operation requirements of different air volumes of the upper pipeline and the lower pipeline of the quenching section air supply system of the kiln are met; clean hot air after heat exchange of the kiln waste heat utilization heat exchange system with the temperature of 220 plus 280 ℃ is mixed with clean air to form rapid cooling air with the temperature of more than 100 ℃, and the rapid cooling air is conveyed to an upper pipeline air supply system of a kiln rapid cooling section roller and a lower pipeline air supply system of the kiln rapid cooling section roller through a rapid cooling fan for use.
[ example 1 ]
In the above examples, the roller kiln was fired to 3200mm by 1600mm by 5.9mm oversized thin plates at a firing temperature of 1190 ℃ to 1220 ℃. The mixed hot air is used for carrying out rapid cooling by using hot air with the temperature reaching 160 ℃ and pure natural cold air with the temperature of 40 ℃, and the temperature of each temperature point of a cooling zone is as follows:
the invention relates to a waste heat utilization system for balancing a temperature field of a cooling section of a kiln and a using method thereof, wherein the maximum specification of a single product is 3200 mm/1600 mm, and the automatic temperature control system improves the existing rapid cooling and slow cooling temperature field and equipment of the kiln, prevents a rapid cooling zone from directly blowing cold air to cool the surface and the bottom of a brick, and correspondingly improves the temperature of the slow cooling section. And adjusting the cooling gradients of the product in the quenching section A, the quenching section B and the strong cooling section C to improve the toughness of the sintered product, so that the subsequent medium opening of the product does not generate medium cracking.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and it is not intended to limit the scope of the present invention, and any person skilled in the art may use the above disclosure to modify or modify the equivalent embodiments with equivalent variations, and implement a waste heat utilization system for equalizing the temperature field of the cooling section of the furnace and the method for using the same according to different requirements and performances. It is understood that any simple modification, equivalent changes and modifications of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, especially the contents of the claims.
Claims (7)
1. A waste heat utilization system for balancing a temperature field of a kiln cooling section is arranged at a roller kiln cooling section, a roller way is arranged in the cooling section, and the roller way is sequentially divided into a quench section, a slow cooling section and a strong cooling section;
wherein the intelligent temperature control system of the quenching section is connected with a quenching fan, and the quenching fan is connected with a cold air inlet;
the quenching fan is also connected with a kiln combustion-supporting air transition pipe, a kiln quenching section roller upper pipeline air supply system and a kiln quenching section roller lower pipeline air supply system, wherein the kiln quenching section roller upper pipeline air supply system is arranged above the quenching section, and the kiln quenching section roller lower pipeline air supply system is arranged below the quenching section; the kiln waste heat utilization heat exchange system is connected with a quenching fan.
2. The system for utilizing the waste heat of the temperature field of the cooling section of the equalizing kiln and the using method thereof as claimed in claim 1, wherein: the quenching fan is a D-type water cooling fan; the quenching fan is two, and pipeline air supply system on one connects kiln quench zone roller, and pipeline air supply system under another connects kiln quench zone roller, and two quenching fans are unified to be connected the cold wind import, and the cold wind import sets up air cleaner.
3. The waste heat utilization system for equalizing the temperature field of the cooling section of the kiln as recited in claim 1, wherein: quench zone air feed system contains pipeline air feed system, kiln quench zone roller lower pipeline air feed system on the kiln quench zone roller, and first bellows manometer of pipeline air feed headtotail is gone up to kiln quench zone roller, and kiln quench zone roller lower pipeline air feed headtotail second bellows manometer.
4. The waste heat utilization system for equalizing the temperature field of the cooling section of the kiln as recited in claim 1, wherein: the kiln waste heat utilization heat exchange system is formed by suspending a row of heat-resistant stainless steel seamless tubes with the diameter of 200mm and the wall thickness of 2mm on the top of a kiln in parallel.
5. The waste heat utilization system for equalizing the temperature field of the cooling section of the kiln as recited in claim 1, wherein: a first bimetal thermometer is arranged on a pipeline between the waste heat utilization heat exchange system of the kiln and the quenching fan, and a second bimetal thermometer is arranged on a connecting pipeline of the quenching fan and the pipeline air supply system below the quenching section roller of the kiln, so that the temperature of hot air at the inlet and the outlet of the quenching fan can be monitored on site conveniently.
6. The waste heat utilization system for equalizing the temperature field of the cooling section of the kiln as recited in claim 1, wherein: the kiln quench section roller upper pipeline air supply system and the kiln quench section roller lower pipeline air supply system are provided with branches, and high-temperature resistant flashboards are arranged at the branches.
7. A method for using a waste heat utilization system for balancing a temperature field of a cooling section of a kiln is characterized in that the waste heat utilization heat exchange system of the kiln is used for conveying clean hot air after heat exchange, the temperature is 220-280 ℃, and the hot air is supplied to a combustion-supporting air system of the kiln through a combustion-supporting air transition pipe and is used outside the cooling air of the kiln; a first bimetal thermometer arranged on a pipeline between the kiln waste heat utilization heat exchange system and a quenching fan, and a second bimetal thermometer arranged on a connecting pipeline of the quenching fan and a kiln quenching section roller lower pipeline air supply system, wherein the temperature of hot air at an inlet and an outlet of the quenching fan is monitored on site;
the natural cold air supplemented by the cold air inlet is provided with an air filter, so that the cold air sucked through the air inlet is ensured not to be mixed with impurities, and a clean air source is kept;
high-temperature-resistant flashboards are arranged at each branch of the quenching air pipeline, so that the proportion of hot air and cold air input by a quenching fan and the air output to each quenching air pipe can be conveniently adjusted by adjusting the flashboards on the corresponding pipelines as required;
the quenching fan adopts a D-type water cooling fan, a fan water cooling device adopts common industrial tap water for cooling, the water pressure is 0.3-0.5MPa, and the water quantity is adjusted to keep the temperature of the bearing not to exceed 70 ℃;
the waste heat utilization system for balancing the temperature field of the kiln cooling section is provided with two quenching fans, one quenching fan supplies quenching air to the air supply system on the quenching section roller of the kiln, and the other quenching fan supplies quenching air to the air supply system on the lower quenching section roller of the kiln, so that the operation requirements of different air volumes of the upper pipeline and the lower pipeline of the quenching section air supply system of the kiln are met;
clean hot air after heat exchange of the kiln waste heat utilization heat exchange system with the temperature of 220 plus 280 ℃ is mixed with clean air to form rapid cooling air with the temperature of more than 100 ℃, and the rapid cooling air is conveyed to an upper pipeline air supply system of a kiln rapid cooling section roller and a lower pipeline air supply system of the kiln rapid cooling section roller through a rapid cooling fan for use.
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Address after: 528061 No.1 and No.2 Baitu village, Lubu Town, Gaoyao District, Zhaoqing City, Guangdong Province Applicant after: GUANGDONG SUMMIT CERAMICS Co.,Ltd. Applicant after: New Pearl Group Co.,Ltd. Applicant after: Foshan Sanshuiguanzhu Ceramics Co.,Ltd. Address before: 528061 No.1 and No.2 Baitu village, Lubu Town, Gaoyao District, Zhaoqing City, Guangdong Province Applicant before: GUANGDONG SUMMIT CERAMICS Co.,Ltd. Applicant before: GUANGDONG NEWPEARL CERAMIC GROUP Co.,Ltd. Applicant before: Foshan Sanshuiguanzhu Ceramics Co.,Ltd. |
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Address after: 526124 Bai Tu Yi and ER Cun, Lubu Town, Gaoyao District, Zhaoqing City, Guangdong Province Patentee after: New Pearl (Guangdong) New Materials Co.,Ltd. Patentee after: New Pearl Group Co.,Ltd. Patentee after: Foshan Sanshuiguanzhu Ceramics Co.,Ltd. Address before: 528061 No.1 and No.2 Baitu village, Lubu Town, Gaoyao District, Zhaoqing City, Guangdong Province Patentee before: GUANGDONG SUMMIT CERAMICS Co.,Ltd. Patentee before: New Pearl Group Co.,Ltd. Patentee before: Foshan Sanshuiguanzhu Ceramics Co.,Ltd. |