CN214039615U - Heat storage heating furnace suction type slag removal device - Google Patents
Heat storage heating furnace suction type slag removal device Download PDFInfo
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- CN214039615U CN214039615U CN202120091962.8U CN202120091962U CN214039615U CN 214039615 U CN214039615 U CN 214039615U CN 202120091962 U CN202120091962 U CN 202120091962U CN 214039615 U CN214039615 U CN 214039615U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 73
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000428 dust Substances 0.000 claims abstract description 27
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 88
- 239000007789 gas Substances 0.000 claims description 74
- 229910052742 iron Inorganic materials 0.000 claims description 44
- 230000001105 regulatory effect Effects 0.000 claims description 37
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 32
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- 239000007787 solid Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Abstract
A suction type slag removal device of a regenerative heating furnace comprises a slag rotating system, wherein the slag rotating system is used for crushing and rotating iron oxide scales in the furnace and sucking the iron oxide scales into a conveying pipe; the slag separating system is connected with the conveying pipe and is used for completely separating iron oxide scales and dust from gas conveyed by the conveying pipe; the smoke exhaust system is connected with the slag separating system and is used for exhausting clean gas generated by the slag separating system; and the air compression system is connected with the conveying pipe and used as a material crushing driving air source. The suction type slag removal method for the regenerative heating furnace has the advantages of small investment, safety, reliability, energy conservation, environmental protection, high operation efficiency and the like, can greatly save the labor cost and the shutdown operation time, and has obvious yield increase benefit.
Description
Technical Field
The utility model relates to a steel rolling heating furnace scarfing cinder technical field especially relates to a formula scarfing cinder device is inhaled to heat accumulation heating furnace.
Background
The heating furnace is one of the most important devices of steel rolling wires in the metallurgical industry, in the blank heating production process, the oxidation rate of a billet is about 1%, about 5000 tons of iron oxide scales are produced in 50 ten thousand tons of production lines every year, about 500 tons (0.1%) of iron oxide scales are accumulated at the bottom of the heating furnace, according to the operation cycle rule of the heating furnace, after a certain period of use, the combustion condition is obviously deteriorated due to the influence of factors such as bottom iron oxide scale accumulation, heat accumulator blockage and burning loss and the like, the combustion incomplete degree is increased, the smoke exhaust temperature and furnace pressure are difficult to control, the heating capacity and other performances are obviously reduced, so the heating furnace needs to be repaired periodically, and the bottom iron oxide scales are cleaned.
The slag removal operation of the heating furnace is the most main work item in each heating furnace maintenance task, and is also the most manpower and labor hour invested in the steel rolling whole-line maintenance items. Because the slag removing operation space of the heating furnace is limited, the number of cross operation points is large, the operation environment temperature is high, the dust is large, and longer furnace shutdown cooling time and furnace drying time are needed, the slag removing operation of the heating furnace often has the remarkable characteristics of heavy task, tight construction period and the like. Due to the limitation of severe working environment and space conditions in the furnace, a general and reliable heating furnace mechanical slag removal technology is not available at present, most enterprises still adopt shovels to manually clean, taking a heating furnace with the capacity of 90t/h as an example, 5-6 shifts (12 hours system) are required for cleaning and digging iron scales when the heating furnace is put into the furnace every time, the working time is nearly 3 days, 30 people are required for cleaning every shift, 1800 working hours are calculated, the cleaning is required twice every year, the total working time is about 6 days, the labor cost is consumed about 20 ten thousand yuan each year, and the yield is about 12000 tons. Therefore, the manual slag removal operation of the traditional heating furnace has the defects of high labor intensity, high labor cost, long operation time and the like, thereby influencing the improvement of the annual yield and the cost control of steel rolling.
Therefore, the suction type slag removal device for the regenerative heating furnace and the slag removal method realized by using the suction type slag removal device have urgent research values, and also have good economic benefits and industrial application potentials, which are the basis of the power place and foundation of the utility model.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-identified drawbacks of the prior art, the present inventors have conducted intensive studies and, after having paid a lot of creative efforts, have completed the present invention.
Particularly, the utility model discloses the technical problem that solve is: provides a suction type slag removal device of a regenerative heating furnace and a slag removal method realized by using the same, so as to solve the technical problems in the background technology.
In order to solve the technical problem, the first aspect of the utility model provides a formula scarfing cinder device is inhaled to heat accumulation heating furnace, include
The slag rotating system is used for crushing and rotating the iron scale in the furnace and sucking the iron scale into the conveying pipe;
the slag separating system is connected with the conveying pipe and is used for completely separating iron oxide scales and dust conveyed by the conveying pipe;
the smoke exhaust system is connected with the slag separating system and is used for exhausting clean gas generated by the slag separating system;
and the air compression system is connected with the conveying pipe and used as a material crushing driving air source.
The working process principle of the whole device is that the original smoke exhausting facilities such as an induced draft fan and the like of the smoke exhausting system of the heat storage heating furnace are used as system suction power, so that a pipeline system generates material conveying suction, a compressed air system (namely an air compression system) is used as a material crushing driving air source, iron oxide scales in the furnace are crushed and rotated through an in-furnace slag rotating system (namely a slag rotating system), the iron oxide scales are sucked into a conveying pipe, and then the iron oxide scales are conveyed to a slag separating system outside the furnace. The slag separating system completely separates the conveyed iron scale and dust through a two-stage solid-gas separator according to a cyclone dust removal principle, the separated iron scale and dust enter a slag hopper, and clean gas is discharged from a chimney through a smoke discharge system.
As an optimal technical scheme, the smoke exhaust system comprises a chimney, a motor, a smoke exhaust pipe, an induced draft fan, a header pipe regulating valve and an induced draft header pipe, and the chimney, the motor, the smoke exhaust pipe, the induced draft fan, the header pipe regulating valve and the induced draft header pipe are all original facility device structures of the heat storage heating furnace, and the facility space and the project investment amount of a newly added system can be greatly saved. The induced draft house steward, discharge fume the pipe and the chimney is connected according to the preface, just induced draft house steward with divide the sediment system intercommunication, the draught fan set up in discharge fume the pipe with induced draft house steward's intercommunication node to power is connected with the motor, house steward governing valve install in on the induced draft house steward, be in the upstream position of draught fan.
The chimney and the induced draft fan utilize the original power facilities of the heat storage heating furnace to generate conveying suction for the system.
As a preferred technical scheme, the smoke exhaust system further comprises a gate valve, wherein the gate valve is installed at the tail end of the air induction main pipe and aims to cut off other leakage suction points of the original smoke exhaust pipeline system and guarantee the suction effect of the system.
As a preferred technical scheme, the slag separating system comprises an induced draft pipe distributor, a secondary solid-gas separator, a primary solid-gas separator, a conveying pipe distributor and a slag hopper, wherein the conveying pipe distributor is arranged at the inlet end of the conveying pipe and is connected with the slag rotating system, the outlet end of the conveying pipe is sequentially connected with the primary solid-gas separator and the secondary solid-gas separator in series, the gas outlet of the secondary solid-gas separator is connected with one end of the induced draft pipe distributor, and the other end of the induced draft pipe distributor is communicated with the induced draft main pipe; the slag hopper is used for receiving solid powder slag and dust separated by the secondary solid-gas separator and the primary solid-gas separator. The conveying pipe distributor adopts a stainless steel quick joint structure, can be connected with 2-3 sets of rotary slag system connecting pipes simultaneously, and can operate simultaneously on iron scales at different positions of a preheating section, a heating section and a soaking section in the furnace, so that the operating efficiency is improved. The induced draft pipe distributor is of a flange type blind plate structure and is divided into three working modes of single coal discharge, single empty discharge and common coal and air; the slag separating system can be switched among three working modes of coal discharging single-purpose, empty discharging single-purpose and coal-air sharing through quick dismounting and mounting of the blind plate, the coal gas induced draft fan and the air induced draft fan can be maintained in turn during blowing-out in the single-purpose mode, and the suction effect of the slag separating system can be enhanced in the sharing mode.
As a preferable technical scheme, the slag separating system further comprises an air seal machine, and the air seal machine is installed on the primary solid-gas separator and used for separating solid powder slag separated by the primary solid-gas separator.
As a preferable technical scheme, the material conveying pipe is connected with the primary solid-gas separator through a quick connector.
When the air-conditioning system works, the scattered iron scale is firstly sucked into the primary centrifugal solid-gas separator through the conveying pipe, the iron scale is separated from air under the centrifugal action and flows into the air seal machine, the air enters the secondary solid-gas separator, fine dust in the air is further separated from the air, and clean air enters the induced draft fan and is discharged through the chimney. Iron scale separated by the first-stage centrifugal solid-gas separator is continuously discharged into the slag hopper under the operation action of the air seal machine, fine dust separated by the second-stage centrifugal solid-gas separator can also be periodically discharged into the slag hopper under the control of a valve, and the vehicle can be stopped and lifted off after the slag hopper is fully discharged. The double-stage solid-gas separation device can completely collect the iron scale and the dust sucked out of the furnace, has high solid-gas separation efficiency, and can ensure that the concentration of the gas and the dust entering a fan and a chimney is lower than 10mg/m3And meets the requirement of environmental protection. The external conveying pipe adopts a temperature-resistant and wear-resistant stainless steel pipe and a quick joint so as to adapt to the material conveying of the iron scale and facilitate the replacement; the delivery pipe distributor adopts stainless steel blockThe quick connector is convenient for simultaneously cleaning iron scales at different positions of the preheating section, the heating section and the soaking section of the heating furnace, thereby improving the operating efficiency.
As a preferred technical scheme, the air compression system comprises a compressed air pipeline, an air source interface, an air filter, a pressure gauge, a pressure regulating valve and an oil atomizer, wherein the air source interface is arranged at one end of the compressed air pipeline, a compressed air hose is externally connected to the other end of the compressed air pipeline, the compressed air pipeline is externally connected with an original on-site compressed air pipeline or an original on-site air compressor by using the air source interface, the air filter is arranged on the compressed air pipeline, an exhaust valve is arranged at the bottom of the air filter, and the oil atomizer is further arranged on the compressed air pipeline.
As a preferable technical solution, a pressure gauge and a pressure regulating valve are arranged on the compressed air pipeline.
As a preferred technical scheme, the air compression system further comprises a rotating speed regulating valve and a silencer which are arranged on the compressed air pipeline, and the load of the breaking and suction device is regulated and the noise of the air passage is reduced.
As a preferable technical solution, the oil atomizer is provided with an oil supply speed regulating valve.
When the rotary slag system works, the compressed air pipeline is externally connected with an original on-site compressed air pipeline or an on-site air compressor by using the air source interface so as to provide a pressure air power source, and the compressed air hose drives the rotary slag system to work; the air filter has the function of filtering impurities in the air pipeline and discharges the impurities through the exhaust valve so as to ensure that the working gas is clean; the pressure gauge can display the field pressure of the system, and the pneumatic pressure is controlled to be between 0.6 and 0.9Mpa through the pressure regulating valve so as to accord with the optimal working pressure range of the breaking and absorbing device in the furnace. The oil feeding speed regulating valve and the oil atomizer play a role in lubricating the gas path, and the rotating speed regulating valve and the silencer can regulate the load of the breaking and absorbing device and reduce the noise of the gas path.
As a preferred technical scheme, the sediment system that revolves includes pneumatic motor, broken rotary drill bit, the cover that induced drafts, stainless steel straw, pneumatic motor fixed mounting in the lateral wall of stainless steel straw, pneumatic motor is external to have the compressed air hose, broken rotary drill bit with pneumatic motor power is connected, the cover that induced drafts surround set up in the outside of broken rotary drill bit, and leave and inhale the material mouth, the stainless steel straw with the cover that induced drafts is connected, the other end utilize the wear-resisting flexible straw of temperature resistant with the system intercommunication of discharging fume.
As a preferred technical scheme, the stainless steel suction pipe is provided with a portable handle, so that the working convenience of the stainless steel suction pipe is realized.
When the device works, compressed air transmitted from a compressed air hose is used as a power source (the pressure is more than or equal to 0.7Mpa), a pneumatic motor is used as an energy converter, the pressure energy of the compressed air is converted into rotary mechanical energy, a crushing and spinning drill bit is driven to crush and spin iron scales in a furnace, and the crushed and spun iron scales enter a stainless steel suction pipe through an air suction hood and are conveyed to a slag separation system under the action of a smoke exhaust system. In the operation process, different drill bit structural forms, such as pipe tooth type, rotary cone type, three-blade type, multi-stage combined type and other types of crushing drills, can be adopted according to the form viscosity of the iron scale at different sections in the furnace, so that the rotary suction conveying of the iron scale at different furnace sections in the furnace is adapted, and the operation efficiency is improved. The total weight of the whole system is less than 20kg, so that an operator can conveniently hold and move in the furnace, the whole structure is light, the section size is less than 300mm multiplied by 400mm, and the whole system can conveniently enter and exit from the position of an overhaul furnace door, so that the whole system is suitable for all heating furnace types.
In a second aspect, the utility model provides a slag removal method realized by utilizing a regenerative heating furnace suction type slag removal device, which comprises the following steps: normally starting the smoke exhaust system and the slag separating system, and stabilizing the working state; opening the air compression system, then opening a switch of a pneumatic motor of the slag rotation system, and waiting for the working state to be stable;
closing a gate valve of the smoke exhaust system;
adjusting a pressure regulating valve to regulate the pressure of air pressure to 0.6-0.9Mpa, and adjusting a rotating speed regulating valve and a silencer to work cooperatively;
carrying out slag rotation work by using a crushing rotary drill bit of a slag rotation system;
and adjusting the slag separating system to realize the separation of solid powder slag and air, discharging the air through the smoke exhaust system, and intercepting the solid powder slag into a slag hopper.
As a preferred technical scheme, in the slag removal method realized by using the suction type slag removal device of the regenerative heating furnace provided by the utility model, the furnace type of the heating furnace is a push steel type regenerative steel rolling heating furnace, the heights of two chimneys are both 25m, the outlet diameter of the coal gas smoke exhaust chimney is 1220mm, and the outlet diameter of the air smoke exhaust chimney is 1020 mm; the specific parameters of the induced draft fan are as follows: the model of the air induced draft fan is Y9-38NO11.2D, and the maximum air volume is 60317m3H, full pressure 4570Pa and power 160 KW; maximum air volume 68000m of gas induced draft fan3H, full pressure 6500Pa and power 220 kW; the suction parameter of the furnace type smoke exhaust device is the performance attribute of the original heat storage heating furnace, the air volume surplus coefficient of a single set of working conditions is more than 15 times, and the power is strong. The standard state flow of the air required by the steel pushing type heat storage heating furnace in the working state of the suction type slag removal system is 3600m3/。
As a preferred technical scheme, in the slag removal method realized by using the suction type slag removal device of the regenerative heating furnace provided by the utility model, the furnace type adopts a walking beam type regenerative heating furnace, the height of the chimney is 25m, the outlet diameter of the coal gas smoke exhaust chimney is 1520mm, and the outlet diameter of the air smoke exhaust chimney is 1320 mm; the induced draft fan 10 has the following specific parameters: the model of the air induced draft fan is Y4-73NO12D, the revolution is 1450r/min, and the maximum air volume is 76040m3H, the highest temperature of a working medium is 200 ℃, the total pressure is 4777Pa, and the power is 250 KW; the model of the coal gas induced draft fan is KLT1850-550, and the maximum air quantity is 129920m3The speed is 1450r/min, the highest temperature of the working medium is 200 ℃, the full pressure is 4500Pa, and the power is 355 kW; the suction parameter of the furnace-type smoke exhaust device is the performance attribute of the original walking beam regenerative heating furnace, and the air volume surplus coefficient of a single set of working conditions is more than 30 times. The standard air flow required by the walking beam type heat storage heating furnace in the working state of the suction type slag removal system is 4000m3/h。
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the investment is small: because the chimney and the electric induced draft fan are original power facilities utilizing the heat storage heating furnace, the system facility space and the project investment amount can be greatly saved.
Safe and reliable: because the breaking and absorbing device is driven by air force, the power operation part in the furnace of the system does not need industrial electricity and industrial hydraulic oil, so the system is safer and more reliable in the high-temperature operation environment in the furnace. Because of the pneumatic motor internal pressure is big than external pressure when operation, and inside operating condition does not receive external environment influence, does not need independent cooling under dusty, moist and high temperature environment in the stove, and inside key parts are cooled off by the drive air supply nature, long service life, so be applicable to the abominable operation environment of stove high temperature dusty very much. The small volume can generate high power, the rotating speed can be changed along with the load, and the pneumatic motor cannot be damaged until the pneumatic motor is shut down in an overload state, so that the pneumatic motor can be started and shut down in an emergency, and the reversing is very easy; the stepless speed regulation can be simply and conveniently carried out from zero to the maximum, and the operation is flexible; the starting torque is large, and the vehicle can be started with load; the pneumatic motor is not easy to generate dangerous factors such as sparks, overheating, explosion, short circuit and the like, is very suitable for the inflammable and explosive severe operation environment with high temperature and dust in the furnace, and has strong environmental adaptability and high safety.
High temperature resistance: the operation in the furnace adopts pneumatic drive, the temperature rise is small, the sucking and conveying part adopts high-temperature resistant materials such as a heat-resistant and wear-resistant flexible suction pipe and the like, and the temperature of the iron sheet dug can reach 450 ℃.
And (3) environmental protection: the system outside the furnace is provided with the double-stage solid-gas separation device, so that the iron oxide scales sucked out from the furnace can be completely collected outside the furnace, and the solid-gas separation efficiency is high; the dust concentration in the gas discharged from the chimney is less than 10mg/m3, thus meeting the requirement of environmental protection.
The working efficiency is high: because the power parameter of the induced draft fan motor of the regenerative heating furnace is large (the heating furnace with the capacity of 90t/h is usually more than 200 KW), the power is strong, the system suction digging capacity can usually reach more than 20 tons/h, and the system suction digging capacity can reach more than 30 tons/h under the condition that a coal gas induced draft fan and an air induced draft fan are adopted for simultaneous operation and a plurality of pneumatic rotating machines are adopted for simultaneous operation in different furnace sections, the labor can be saved by more than 70 percent compared with manual cleaning, and the time is saved by more than 60 percent.
More specifically, the utility model discloses a cost of using manpower sparingly. Taking a heating furnace with the capacity of 90t/h as an example, the labor cost for pure manual cleaning of the bottom iron oxide scale is about 20 ten thousand yuan per year, the labor can be saved by more than 70 percent by adopting the mode of the utility model, and the labor cost is about 14 ten thousand yuan per year; secondly, the yield increasing benefit is obvious. Taking a heating furnace with the capacity of 90t/h as an example, the annual total operation time of pure manual cleaning of furnace bottom iron oxide scales is about 6 days, the influence on the yield is about 12000 tons, the mode of the utility model can reduce the operation time by more than 60 percent, the annual yield increase is more than 7200 tons, and if the ton steel benefit is calculated according to the average 200 yuan, the annual benefit increase is more than 144 ten thousand yuan.
To sum up, the utility model discloses a formula scarfing cinder method is inhaled to regenerative heating furnace has advantages such as investment is little, safe and reliable, energy-concerving and environment-protective, operating efficiency height, can save human cost and blowing out the stove operating time by a wide margin, and the yield-increasing benefit is showing, has very big potential social.
Drawings
FIG. 1 is a schematic view of the system of the present invention;
FIG. 2 is a schematic structural view of the main apparatus outside the furnace;
FIG. 3 is a schematic view of a compressed air line installation;
FIG. 4 is a schematic view of the main apparatus in the furnace;
the drawing marks comprise 1, a smoke discharging system, 2, a slag separating system, 3, an air compressing system, 4, a slag rotating system, 5, a heat accumulating type heating furnace, 6, iron scale, 7, a chimney, 8, an electric motor, 9, a smoke discharging pipe, 10, an induced draft fan, 11, a main pipe regulating valve, 12, an induced draft main pipe, 13, a gate valve, 14, an induced draft pipe distributor, 15, a secondary solid-gas separator, 16, a primary solid-gas separator, 17, a quick joint, 18, an air shutter, 19, a material conveying pipe, 20, a conveying pipe distributor, 21, a slag bucket, 22, an air source interface, 23, an air filter, 24, an exhaust valve, 25, a pressure gauge, 26, a pressure regulating valve, 27, an oil feeding speed regulating valve, 28, a rotating speed regulating valve, 29, a silencer, 30, an oil mist sprayer, 31, a suction conveying pipe quick joint, 32, a suction conveying regulating valve, 33, a stainless steel suction pipe, 34, a hand lifting handle, 35, a motor fixing disc, 36. the suction hood, 37, a crushing rotary drill bit, 38, a coupling, 39, a pneumatic motor, 40, a compressed air hose, 41, a motor switch and 42, a temperature-resistant and wear-resistant flexible suction pipe.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and the embodiments described below are only some embodiments of the present invention, not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention. 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.
[ example 1 ]
A suction type slag removal device of a regenerative heating furnace comprises a slag rotating system, a slag separating system, a smoke exhaust system and a pressure air system, wherein the slag rotating system is used for crushing and rotating iron scales in the furnace and sucking the iron scales into a conveying pipe; the slag separating system is connected with the conveying pipe and is used for completely separating iron oxide scales and dust conveyed by the conveying pipe; the smoke exhaust system is connected with the slag separating system and is used for exhausting clean gas generated by the slag separating system; the air compression system is connected with the conveying pipe and used as a material crushing driving air source.
The process flow and the working principle process of the utility model are shown in figure 1: the process flow facility mainly comprises four sub systems, namely a smoke exhaust system 1, a slag separating system 2, a pressure air system 3 and a slag rotating system 4. The working process principle is that the original facility of the smoke exhaust system 1 of the heat storage heating furnace 5 is used as system suction power to generate suction force in the conveying pipe, the compressed air system 2 is used as a material crushing driving air source, the iron scale 6 in the furnace is crushed, rotated and sucked into the conveying pipe through the slag rotating system 4 in the furnace, solid gas fluid in the pipe is conveyed to the slag separating system 2 outside the furnace, the slag separating system 2 completely separates the conveyed iron scale 6, dust and air through the two-stage solid-gas separator according to the cyclone dust removal principle, the separated clean air is exhausted from the chimney 7 through the smoke exhaust system 1, and the separated iron scale 6 and dust are exhausted into the slag hopper 21.
The specific structure of system 1 and the method of operation of discharging fume are as shown in fig. 2, including chimney, motor, the pipe of discharging fume, draught fan, house steward governing valve and induced air house steward, the pipe of discharging fume and chimney are connected according to the preface, just induced air house steward and branch sediment system intercommunication, the draught fan set up in discharge fume the pipe with induced air house steward's intercommunication node, and power connection has the motor, house steward governing valve install in induced air house steward is last, is in the upstream position of draught fan, the system of discharging fume still includes the push-pull valve, the push-pull valve is installed in induced air house steward's end, and the purpose is other leak hunting points that cut off original piping system of discharging fume, guarantees the suction effect of system. In this embodiment, the main facilities of the smoke exhaust system 1 include a chimney 7, a motor 8, a smoke exhaust pipe 9, an induced draft fan 10, a main pipe regulating valve 11, an induced draft main pipe 12 and the like, and the system generates a strong suction force and exhausts clean air. In the embodiment, the steel pushing type heat storage heating furnace with the capacity of 90t/h is provided with the gas smoke exhaust pipeline and the air smoke exhaust pipeline which are respectively and independently arranged, so that two sets of smoke exhaust systems 1 are shared and can respectively and independently operate. Wherein the height of the two chimneys 7 is 25m, the diameter of the outlet of the coal gas smoke exhaust chimney is 1220mm, and the diameter of the outlet of the air smoke exhaust chimney is 1020 mm. The induced draft fan 10 has the following specific parameters: the model of the air induced draft fan is Y9-38NO11.2D, the maximum air volume is 60317m3/h, the full pressure is 4570Pa, and the power is 160 KW; the maximum air volume of the coal gas induced draft fan is 68000m3/h, the full pressure is 6500Pa, and the power is 220 kW. The air standard flow required by the heat storage heating furnace in the working state of the suction type slag removal system is about 3600m3/h, and the actual surplus coefficient of each induced draft fan configured in the embodiment is more than 15 times, so that the system power is strong. After the system is started, the smoke exhaust system can generate stronger suction under the action of the electric induced draft fan, and clean air separated from the slag separating system 2 is exhausted into the atmosphere through the induced draft main pipe 12, the main pipe regulating valve 11, the induced draft fan 10, the smoke exhaust pipe 9 and the chimney 7 in sequence.
The slag separating system 2 is as shown in figure 2, and comprises an induced draft pipe distributor, a secondary solid-gas separator, a primary solid-gas separator, a conveying pipe distributor and a slag hopper, wherein the conveying pipe distributor is arranged at the inlet end of the conveying pipe and is connected with the rotary slag system, the outlet end of the conveying pipe is sequentially connected with the primary solid-gas separator and the secondary solid-gas separator in series, the gas outlet of the secondary solid-gas separator is connected with one end of the induced draft pipe distributor, and the other end of the induced draft pipe distributor is communicated with the induced draft main pipe; the slag hopper is used for receiving solid powder slag and dust separated by the secondary solid-gas separator and the primary solid-gas separator; the air seal machine is arranged on the primary solid-gas separator and is used for separating solid powder slag separated by the primary solid-gas separator; the conveying pipeline is connected with the primary solid-gas separator through a quick connector.
In this embodiment, the slag separating system of the main facilities of the working process flow comprises an induced air duct distributor 14, a secondary solid-gas separator 15, a primary solid-gas separator 16, a quick coupling 17, an air seal machine 18, a material conveying pipe 19, a conveying pipe distributor 20 and a slag hopper 21. The process operation procedure is as follows: the solid-gas materials conveyed from the slag-swirling system 3 in the furnace pass through a conveying pipe distributor 20 and a conveying pipe 19 and are firstly sucked into a first-stage centrifugal solid-gas separator 16, iron oxide scales are separated from air under the centrifugal action and flow into an air seal machine 18, the air enters a second-stage solid-gas separator 15, fine dust in the air is separated from the air, and clean air enters the smoke exhaust system 1 through an induced air pipe distributor 14. Wherein, the iron scale 6 separated in the first-stage centrifugal solid-gas separator 16 is continuously discharged into the slag hopper 21 under the operation of the air seal machine 12, the fine dust separated in the second-stage centrifugal solid-gas separator 15 can be periodically discharged into the slag hopper 21 through the valve control, and the slag hopper 21 can be lifted off and loaded for transportation after being fully discharged.
The air compression system 3 is as shown in fig. 3, and comprises a compressed air pipeline, an air source interface, an air filter, a pressure gauge, a pressure regulating valve and an oil atomizer, wherein the air source interface is arranged at one end of the compressed air pipeline, a compressed air hose is externally connected to the other end of the compressed air pipeline, the compressed air pipeline is externally connected with an original on-site compressed air pipeline or an original on-site air compressor by the aid of the air source interface, the air filter is arranged on the compressed air pipeline, an exhaust valve is arranged at the bottom of the air filter, the oil atomizer is further arranged on the compressed air pipeline, and the pressure gauge and the pressure regulating valve are arranged on the compressed air pipeline. The compressed air system also comprises a rotating speed regulating valve and a silencer which are arranged on the compressed air pipeline, and the load of the breaking and absorbing device is regulated and the noise of the air passage is reduced. The oil atomizer is provided with an oil feeding speed regulating valve.
In this embodiment, the major components of the air compression system 3 in the working process flow include an air source interface 22, an air filter 23, an exhaust valve 24, a pressure gauge 25, a pressure regulating valve 26, an oil supply speed regulating valve 27, a rotation speed regulating valve 28, a muffler 29, an oil atomizer 30, and the like. The function of the device is to provide a clean and reliable driving air source for the slag-rotating system 4 in the furnace. The system has the structural characteristics that: the air source interface 22 is connected with an original on-site compressed air pipeline or an on-site air compressor; the air filter 23 plays a role in filtering impurities in the air pipeline, and discharges the impurities through the exhaust valve 24 to ensure that the working gas is clean; the pressure gauge 25 can display the field pressure of the system, and the pneumatic pressure is controlled to be between 0.6 and 0.9MPa through the pressure regulating valve 26 so as to accord with the optimal working pressure range of the breaking and absorbing device in the furnace. The oil supply speed regulating valve 27 and the oil atomizer 30 play a role in gas path lubrication, and the rotating speed regulating valve 28 and the silencer 29 can regulate the load of the breaking and absorbing device and reduce the noise of the gas path.
It is shown in fig. 4 to revolve sediment system 4, it includes air motor, broken rotary drill bit, the cover that induced drafts, the stainless steel straw to revolve the sediment system, air motor fixed mounting in the lateral wall of stainless steel straw, air motor is external to have the compressed air hose, broken rotary drill bit with air motor power is connected, the cover that induced drafts surround set up in broken rotary drill bit's outside just leaves and inhales the material mouth, the stainless steel straw with the cover that induced drafts is connected, the other end utilize the wear-resisting flexible straw of temperature resistance with the system intercommunication of discharging fume, be provided with the portable handle on the stainless steel straw, realize the work convenience of stainless steel straw. In this embodiment, the main components of the slag-rotating system 4 in the working process flow include a suction and delivery pipe quick coupling 31, a suction and delivery adjusting valve 32, a stainless steel suction pipe 33, a handle 34, a motor fixing disc 35, a suction hood 36, a crushing and rotary drill bit 37, a coupling 38, a pneumatic motor 39, a compressed air hose 40, a motor switch 41, a temperature-resistant and wear-resistant flexible suction pipe 42, and the like. The system has the structural characteristics that: compressed air is used as a power source (the pressure is more than or equal to 0.7Mpa), a pneumatic motor 39 is used as an energy converter, the pressure energy of the compressed air is converted into rotary mechanical energy, a crushing and turning bit 37 is driven to crush and turn the iron oxide scale in the furnace, the crushed and turning bit enters a stainless steel suction pipe 33 through an air suction hood 36, and the crushed and turning bit is conveyed to a slag separating system outside the furnace under the action of a smoke discharging system outside the furnace. In the operation process, different structural forms of the drill bit 37, such as a pipe tooth type, a rotary cone type, a three-blade type, a multi-stage combined type and other types of crushing drills, can be adopted according to the form viscosity of the iron scale at different section positions in the furnace, so as to adapt to the rotary suction and conveying of the iron scale 6 at different furnace sections in the furnace, and further improve the operation efficiency.
The effect of the embodiment is as follows: in the embodiment, original power facilities of the heat storage heating furnace such as a chimney and an electric induced draft fan are utilized, so that the system facility space and the project investment amount are greatly saved; the breaking and absorbing device is driven by air force, and is very suitable for the inflammable, explosive, high-temperature and dusty severe operating environment in the furnace, so the environmental suitability is strong, and the safety is high; the system adopts high-temperature resistant materials such as a heat-resistant and wear-resistant flexible suction pipe and the like, and can adapt to the clearing and digging operation of the high-temperature iron oxide scale at 450 ℃; the dust concentration of the gas discharged by the double-stage solid-gas separation device is less than 10mg/m3, so that the environmental protection requirement is met; the actual power surplus systems of the two induced draft fans configured on site are both more than 15 times, the power is strong, and the operation suction and excavation capacity for granular and flaky iron scales reaches 20 tons/hour. In the embodiment, except for the sintered and nodulated iron scale (caused by overload intensified heating in the production process) close to the bottom of the soaking bed of the steel pushing heating furnace, the iron scale at the bottom of the furnace at other positions can be efficiently cleaned in a suction type mechanical slag cleaning mode, the suction type mechanical cleaning degree of the whole furnace can reach 90 percent, compared with the pure manual mode for cleaning the iron scale at the bottom of the furnace, the labor consumption is reduced from 1800 hours/year (the cost is about 20 ten thousand yuan) to 50 hours/year, the labor is saved by more than 70 percent, the operation time is reduced from 6 days/year to less than 3 days/year, the operation time is reduced by more than one time, the labor cost and the shutdown maintenance time can be greatly saved, and the operation efficiency is improved. The suction type slag removal operation method in the embodiment has the remarkable advantages of low investment, high temperature resistance, long service life, high operation efficiency and the like.
[ example 2 ]
The difference between the present embodiment and the first embodiment is that the walking beam type regenerative heating furnace has a capacity of 160t/h, and the process flow is as shown in fig. 1: the system mainly comprises a smoke exhaust system 1, a slag separating system 2, a pressure air system 3 and a slag rotating system 4. The smoke exhaust system 1 can enable the system to generate material conveying and sucking power, the air compression system 2 provides a clean driving air source for material crushing, the slag rotation system 4 crushes and rotates the iron scale 6 at the bottom of the heat storage heating furnace 5 and sucks the crushed iron scale into the conveying pipe, and the slag separation system 2 completely separates the conveyed iron scale 6, dust and air and collects the separated iron scale 6.
As shown in fig. 2, the smoke exhaust system 1 of the present invention still uses the original smoke exhaust system facilities of the walking beam regenerative heating furnace, and the facility structure and process parameters thereof are characterized in that the height of the chimney 7 is 25m, the outlet diameter of the gas smoke exhaust chimney is 1520mm, and the outlet diameter of the air smoke exhaust chimney is 1320 mm. The induced draft fan 10 has the following specific parameters: the model of the air induced draft fan is Y4-73NO12D, the revolution is 1450r/min, the maximum air volume is 76040m3/h, the maximum temperature of a working medium is 200 ℃, the total pressure is 4777Pa, and the power is 250 KW; the model of the coal gas induced draft fan is KLT1850-550, the maximum air volume is 129920m3/h, the revolution is 1450r/min, the maximum temperature of a working medium is 200 ℃, the total pressure is 4500Pa, and the power is 355 kW. The air standard flow required by the heat storage heating furnace in the working state of the suction type slag removal system is about 4000m3/h, so the air volume surplus coefficient of the draught fan actually configured on site reaches 15-30 times, and the power is strong. In order to ensure the stability of the material sucking and conveying of the system, the flow rate and the pressure of the system can be controlled by operating the opening of the main pipe regulating valve 11, wherein the opening of the main pipe regulating valve 5 is about 30 percent. In order to avoid other suction leakage points of the original heating and smoke discharging pipeline system from influencing the suction effect of the system, a gate valve 13 is arranged at the tail end of the induced draft main pipe 12 and is arranged behind the induced draft pipe distributor 14. Before the system operates, the gate valve 13 is closed to ensure the suction effect of the system operation. After the operations are adopted, the motor 8 and the draught fan 10 are started, the smoke exhaust system 1 can generate strong material conveying suction after being started, and therefore clean air separated by the slag separation system 2 is exhausted into the atmosphere through the draught main pipe 12, the main pipe regulating valve 11, the draught fan 10, the smoke exhaust pipe 9 and the chimney 7 in sequence.
The slag separating system 2 is shown in figure 2, and has the characteristics of facility structure and process parameters that the conveying pipe distributor 20 adopts a stainless steel quick joint structure and can be simultaneously connected with 2-3 sets of rotary slag system connecting pipes so as to facilitate simultaneous operation of oxide scales at different positions of a preheating section, a heating section and a soaking section in the furnace, thereby improving the operation efficiency. The material conveying pipes 19 are made of temperature-resistant and wear-resistant stainless steel materials so as to adapt to material conveying of the iron scale, the pipe diameter is 120-150 mm, the flow velocity of materials in the pipes is more than 16m/s, and the required separation velocity and kinetic energy before the iron scale and air enter the two-stage separator are guaranteed. The air seal machine 18 has high air tightness and wear resistance, can achieve continuous discharging and feeding, can change the feeding by adjusting the rotating speed of the impeller, has the feeding amount in direct proportion to the rotating speed within a certain rotating speed range, and is suitable for feeding or discharging high-temperature materials. The quick connector 17 and other connecting pieces are made of temperature-resistant and wear-resistant stainless steel and adopt standard interface pieces so as to facilitate the quick maintenance and replacement of the feed delivery pipe 19; after the incoming materials are subjected to double-stage separation by the primary solid-gas separator 16 and the secondary solid-gas separator 15, iron oxide scales and dust sucked out of the furnace can be completely collected outside the furnace, the solid-gas separation efficiency is high, the concentration of the gas dust entering a fan and a chimney can be lower than 10mg/m3, and the environmental protection requirement is met. The induced draft pipe distributor 14 is of a flange-type blind plate structure and is divided into three working modes of single coal discharge, single empty discharge and common coal and air; the slag separating system can be switched among three working modes of coal discharging single-purpose, empty discharging single-purpose and coal-air sharing through quick dismounting and mounting of the blind plate, the coal gas induced draft fan and the air induced draft fan can be maintained in turn during blowing-out in the single-purpose mode, and the suction effect of the slag separating system can be enhanced in the sharing mode.
The slag rotating system 4 is shown in fig. 4, and the facility structure and the process parameter characteristics are as follows: the suction and delivery pipe quick connector 31 can quickly assemble and connect the temperature-resistant and wear-resistant flexible suction pipe 42 and the stainless steel suction pipe 33; the suction and delivery regulating valve 32 can facilitate the field operator to regulate the suction force and the operation speed; the stainless steel suction pipe 33 is made of DN80 temperature-resistant and wear-resistant stainless steel pipe, is a main frame of the slag-rotating system, and is provided with two lifting handles 34 to form a hand-held rod type breaking and suction device structure. Both hands carry handle 34 and adopt adiabatic silica gel material to avoid high temperature environment operation to scald one's hand, and adopt two handle structures, with the nimble operating angle of adjusting of site operation personnel of being convenient for. The motor fixing disk 35 adopts a pipe clamp structure, and the pneumatic motor 39 is fixed on the stainless steel suction pipe 33 by a refined bolt. The air suction cover 36 is fixed on the stainless steel suction pipe 33 in a flange connection mode, can seal the space of the broken iron scale, enhances the adsorption effect, can prevent flying slag from hurting people, and can reduce the escape of raised dust generated in the breaking process. The crushing rotary drill bit 37 adopts a conical spoke spiral cobalt structure, and the coupling 38 adopts a stainless steel material and a jackscrew fixing structure, and has the function of connecting the crushing rotary drill bit 37 and the pneumatic motor 39 together. The pneumatic motor 39 adopts a speed reduction integrated structure type (the original rotating speed of the motor is 2500rpm), and outputs the rotating speed 833rpm and the output power is 4.5HP (3.3 KW); the compressed air hose 40 adopts a DN10 flexible rubber hose to facilitate the movement of the breaking and sucking system in the furnace, and the air pressure is 0.7-0.8 Mpa to provide power for the pneumatic motor. The motor switch 41 is arranged at the front end of the motor air inlet, and the start and the operation of the motor are conveniently controlled on site by an operator through operating a switch handle. The heat-resistant and wear-resistant flexible suction pipe 42 is formed by combining a plurality of DN80 standard stainless steel hose pieces, each hose piece is connected in a quick joint mode so as to facilitate quick lap joint adjustment, maintenance and replacement of the conveying pipe, the flexible suction pipe 42 has good wear resistance and high heat-resistant temperature, and can adapt to the cleaning operation of hot iron scale at 500 ℃. The total weight of the slag rotating system is less than 20kg except the flexible suction pipe 42, so that an operator can conveniently hold and move in the furnace, the overall structure is light, the section size is less than 300mm multiplied by 400mm, and the slag rotating system can conveniently enter and exit from the position of an overhaul furnace door, so that the slag rotating system is suitable for all heating furnace types.
The effects of the embodiment are as follows: in the embodiment, the power is pumped by using the original smoke exhaust facilities such as the original draught fan of the walking beam type heat storage heating furnace as the system, the air volume surplus coefficient of the original draught fan is as high as 30 times, the power is strong, and the space of the system facility and the investment amount of the project are greatly saved; the newly added facility system adopts all temperature-resistant and wear-resistant matching parts, and can adapt to the clearing and digging operation of the high-temperature oxide scale at 500 ℃. The breaking and absorbing device is driven by air force, does not need to be cooled independently in dusty, damp and high-temperature environments in the furnace, and is not easy to generate dangerous factors such as sparks, overheating, explosion, short circuit and the like, so the breaking and absorbing device is very safe and reliable for long-term operation in the high-temperature operation environment in the furnace; the gas and air induced draft fans are adopted to operate simultaneously, and a plurality of pneumatic rotating machines are adopted to operate simultaneously in different furnace sections, so that the suction and excavation capacity of the system can reach more than 30 tons/hour, and the slag rotating device in the furnace is light and handy in structure and can be suitable for all heating furnace types. In the embodiment, the furnace slag at the bottom of the walking beam type regenerative heating furnace is powdery and flaky iron scale, the thickness of the iron scale is less than 8mm, the furnace slag is basically free of burning type massive iron scale, the suction type mechanical cleaning degree can reach 100%, compared with the operation mode of manually cleaning the iron scale at the bottom of the furnace, the method saves the labor by 75%, reduces the operation time by more than 65%, can greatly save the labor cost and the furnace shutdown maintenance time, and improves the operation efficiency. The suction type slag removal operation method in the embodiment has the remarkable advantages of low investment, high temperature resistance, long service life, strong applicability, high operation efficiency and the like.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes, modifications and/or alterations to the present invention may be made by those skilled in the art after reading the technical disclosure of the present invention, and all such equivalents may fall within the scope of the present invention as defined by the appended claims.
Claims (9)
1. The utility model provides a formula scarfing cinder device is inhaled to heat accumulation heating furnace which characterized in that: comprises that
The slag rotating system is used for crushing and rotating the iron scale in the furnace and sucking the iron scale into the conveying pipe;
the slag separating system is connected with the conveying pipe and is used for completely separating iron oxide scales and dust from gas conveyed by the conveying pipe;
the smoke exhaust system is connected with the slag separating system and is used for exhausting clean gas generated by the slag separating system;
and the air compression system is connected with the conveying pipe and used as a material crushing driving air source.
2. The suction type slag removal device of the regenerative heating furnace according to claim 1, wherein: the system of discharging fume includes chimney, motor, the pipe of discharging fume, draught fan, house steward governing valve and induced draft house steward, discharge fume pipe and chimney are connected according to the preface, just induced draft house steward and branch sediment system intercommunication, the draught fan set up in discharge fume the pipe with induced draft house steward's intercommunication node, and power connection has the motor, house steward governing valve install in induced draft house steward is last, is in the upstream position of draught fan.
3. The suction type slag removal device of the regenerative heating furnace according to claim 2, wherein: the smoke exhaust system further comprises a gate valve, and the gate valve is installed at the tail end of the air induction main pipe.
4. The suction type slag removal device of the regenerative heating furnace according to claim 3, wherein: the slag separating system comprises an induced draft pipe distributor, a secondary solid-gas separator, a primary solid-gas separator, a conveying pipe distributor and a slag hopper, wherein the conveying pipe distributor is arranged at the inlet end of the conveying pipe and is connected with the slag rotating system, the outlet end of the conveying pipe is sequentially connected with the primary solid-gas separator and the secondary solid-gas separator in series, the gas outlet of the secondary solid-gas separator is connected with one end of the induced draft pipe distributor, and the other end of the induced draft pipe distributor is communicated with the induced draft main pipe; the slag hopper is used for receiving solid powder slag and dust separated by the secondary solid-gas separator and the primary solid-gas separator.
5. The suction type slag removal device of the regenerative heating furnace according to claim 4, wherein: the conveying pipeline is connected with the primary solid-gas separator through a quick connector.
6. The suction type slag removal device of the regenerative heating furnace according to claim 5, wherein: the compressed air system comprises a compressed air pipeline, an air source interface, an air filter, a pressure gauge, a pressure regulating valve and an oil atomizer, wherein the air source interface is arranged at one end of the compressed air pipeline, a compressed air hose is externally connected at the other end of the compressed air pipeline, the compressed air pipeline utilizes the air source interface to externally connect an original compressed air pipeline or an original on-site air compressor, the air filter is arranged on the compressed air pipeline, an exhaust valve is arranged at the bottom of the air filter, and the oil atomizer is further arranged on the compressed air pipeline.
7. The suction type slag removal device of the regenerative heating furnace according to claim 6, wherein: the compressed air system also comprises a rotating speed regulating valve and a silencer which are arranged on the compressed air pipeline, and the load of the breaking and absorbing device is regulated and the noise of the air passage is reduced.
8. The suction type slag removal device of the regenerative heating furnace according to claim 7, wherein: the rotary slag system comprises a pneumatic motor, a broken rotary drill bit, an air suction cover and a stainless steel suction pipe, wherein the pneumatic motor is fixedly installed on the side wall of the stainless steel suction pipe, a compressed air hose is externally connected with the pneumatic motor, the broken rotary drill bit is in power connection with the pneumatic motor, the air suction cover surrounds the outside of the broken rotary drill bit, a suction port is reserved, the stainless steel suction pipe is connected with the air suction cover, and the other end of the stainless steel suction pipe is communicated with the smoke exhaust system by utilizing a temperature-resistant and wear-resistant flexible suction pipe.
9. The suction type slag removal device of the regenerative heating furnace according to claim 8, wherein: the stainless steel suction pipe is provided with a hand-held handle.
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| CN114763971A (en) * | 2021-01-14 | 2022-07-19 | 冯峰 | Suction type slag removal device of heat storage heating furnace and slag removal method realized by suction type slag removal device |
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| CN114763971A (en) * | 2021-01-14 | 2022-07-19 | 冯峰 | Suction type slag removal device of heat storage heating furnace and slag removal method realized by suction type slag removal device |
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