CN113150802A - On-line coke cleaning ascending pipe of coke oven and on-line coke cleaning method thereof - Google Patents
On-line coke cleaning ascending pipe of coke oven and on-line coke cleaning method thereof Download PDFInfo
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- CN113150802A CN113150802A CN202110352894.0A CN202110352894A CN113150802A CN 113150802 A CN113150802 A CN 113150802A CN 202110352894 A CN202110352894 A CN 202110352894A CN 113150802 A CN113150802 A CN 113150802A
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- coke
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- decoking
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/04—Removing incrustations by mechanical means
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses an on-line coke cleaning ascending pipe of a coke oven and an on-line coke cleaning method thereof, and the on-line coke cleaning ascending pipe comprises a coke oven body, an ascending pipe base, an ascending pipe tee joint, an on-line coke cleaning driving device, an inserted butt joint section, an ascending pipe water sealing cover, a heat extractor in the ascending pipe, a coke cleaning driving screw, a coke cleaning device, a support, a pipe base coke cleaning device and a coke oven mouth coke cleaning device, wherein the ascending pipe base is installed at the oven mouth part of the coke oven body, the ascending pipe is installed on the ascending pipe base, the ascending pipe tee joint is installed on one side of the top of the ascending pipe, and the ascending pipe water sealing cover is fixed at the top of the ascending pipe. The coke oven ascending pipe online decoking device is novel in structure and ingenious in conception, and the coke oven ascending pipe online decoking is realized by the fact that the coke oven ascending pipe is coked at the fire hole of the coke oven ascending pipe seat and the ascending pipe root channel at the ascending pipe seat in the coke oven operation process, and the problem of coking and coke hanging of the online decoking device is solved.
Description
Technical Field
The invention relates to the technical field of coke ovens, in particular to an on-line coke cleaning ascending pipe of a coke oven and an on-line coke cleaning method thereof.
Background
A certain amount of high-temperature raw gas is generated in the production process of the coke oven, the temperature reaches about 850 ℃, some macromolecular hydrocarbons can be cracked into methane under the action of high temperature of the raw gas generated in the coking process of the coke oven, and the methane is continuously subjected to the action of high temperature to crack free carbon and hydrogen. The free carbon is easily attached to the interior of the rising pipe discharging the gas, and then forms a graphite layer firmly adhered to the brick. If the graphite layer is not removed in time, the growth of graphite is accelerated because the ascending pipe channel is small. Finally, the high-temperature coke oven is interrupted in production, so that enterprises suffer huge economic loss.
At present, the operation in front of a coke oven in the coking industry at home and abroad is a special post with high temperature and high pollution, and the manual operation is still relied on to remove residual coal and furnace end coke in front of a coking chamber door and substances such as tar, asphalt and the like adhered on a coke flowing plate. During coke pushing operation of the coke oven, residual coke at the oven mouth and a coke dripping plate at the oven bottom after coke pushing are manually cleaned, high-temperature oven wall heat radiation, high-temperature tar volatilization and the like during the operation of opening the oven door cause severe operation environment, the labor intensity is very high, the damage to operators at the oven mouth is huge, and simultaneously, a large amount of harmful and pollutant volatilization and leakage are caused, and the surrounding environment is seriously polluted.
Therefore, the removal of graphite adhering to the interior of the riser pipe of a coke oven has been a subject of research and search in the coking industry. At present, the coking industry generally adopts the method of introducing a large amount of excess air into a coke oven and utilizing C +02—C02The chemical reaction of (2) gasifies and decomposes the graphite to reduce the generation of graphite. However, the main function of the coke oven is to supply heat energy by burning coal, and a large amount of excess air can take away the heat energy, thereby causing heat energy loss and reducing the combustion efficiency of the coke oven.
To this end, the applicant filed utility model No. 200720201268.7 discloses a graphite removing device for coke oven risers, which removes graphite from the riser by mechanical cutting. The device mainly comprises a lifting device arranged outside the ascending pipe and a cutting device controlled by the lifting device to do lifting motion, wherein the lifting device is connected with the cutting device through a transmission flexible shaft, and the transmission flexible shaft is sealed in a folding heat insulation cover; because the lifting device is connected with the cutting device through the transmission flexible shaft, in order to stabilize the cutting device during working, the cutting device is also provided with a tensioning device so as to fix the cutting device in the ascending pipe; in addition, in order to ensure the working efficiency, the cutting device needs to be capable of moving up and down in the riser pipe while performing cutting operation, and for this purpose, the cutting device adopts a rather complicated structure, namely, the cutting device is composed of two components which can stretch out relatively, wherein one component is fixed in the riser pipe through a tensioning device, and the other component is driven by a transmission mechanism to do rotary cutting movement and simultaneously move up and down in the riser pipe.
CN106288870A claim 1, wherein the system comprises a riser root heat exchanger, a waste heat recovery device, a rotary turbulent scraper and a transmission device; the heat exchange device at the root of the ascending pipe comprises an outer cylinder and a heat exchanger, the outer cylinder is sleeved outside the raw gas channel at the root of the ascending pipe and forms an annular space with the outer wall of the raw gas channel, the heat exchanger is positioned in the annular space, a working medium outlet is formed in the outer cylinder, and the outlet of the heat exchanger is connected with the waste heat recovery device through the working medium outlet; the rotary turbulence scraper comprises a rotating shaft, turbulence blades and scrapers, the rotating shaft is positioned in the raw coke oven gas channel, the straight pipe section of the ascending pipe and the inner cavity of the bridge pipe, the turbulence blades are distributed along the height direction of the rotating shaft, the tail ends of the turbulence blades are connected with the scrapers, and the distance between the scrapers and the inner wall of the raw coke oven gas channel, the distance between the scrapers and the inner wall of the straight pipe section of the ascending pipe and the distance between the scrapers and the inner wall of the bridge pipe can be adjusted; the transmission device is connected with the rotating shaft and can drive the rotating shaft to rotate.
The invention relates to a riser root heat exchange device (namely a waste heat recovery device), which is provided with a waste heat recovery device, wherein most of heat in the heat exchange quantity comes from a coke oven, the heat exchange waste heat recovery device cannot achieve the purpose of riser waste heat recovery and energy saving, and actually the riser root heat exchange device is not required to be arranged, otherwise, the combustion use quantity of coke oven fuel is increased, the coke oven emission is increased, and the design is energy-consuming; the waste heat recovery device does not comprise an insertion type raw coke oven gas waste heat recovery device, and practice and numerical calculation are as follows: the central part of the crude gas in the ascending pipe is arranged outside the crude gas channel sleeved at the root part of the ascending pipe by the outer cylinder and forms an annular space with the outer wall of the crude gas channel, the crude gas waste heat recovery heat exchanger of the heat exchanger positioned in the annular space can only exchange heat to the outer wall of the ascending pipe to form the heat of the crude gas at the edge part of the annular space, the existing heat exchanger of the outer wall of the ascending pipe forms the annular space and does not exchange heat to the outer wall of the ascending pipe to form the heat of the crude gas at the central part of the annular space, therefore, after the problem of on-line coke cleaning is solved, the internal insertion type waste heat recovery device is inevitably used for recovering the heat of the crude gas at the central part of the annular space formed on the outer wall of the ascending pipe, if the internal insertion type waste heat recovery device is provided, the functions of the rotary turbulent flow scraper and the transmission device cannot be realized, and the functions of the following claims 6 to 9 can be mentioned.
The system for cleaning graphite in the riser of the coke oven and recovering the waste heat of the crude gas as claimed in claim 1, wherein the spoiler blade comprises a first sub-blade, a second sub-blade and a distance adjusting mechanism;
one end of the first sub-blade is fixed on the rotating shaft, the other end of the first sub-blade is connected with one end of the distance adjusting mechanism, the other end of the distance adjusting mechanism is connected with one end of the second sub-blade, the other end of the second sub-blade is connected with the scraper, and the distance between the scraper and the inner wall of the raw coke oven gas channel, the distance between the scraper and the inner wall of the straight pipe section of the ascending pipe and the distance between the scraper and the inner wall of the bridge pipe can be adjusted by the distance adjusting mechanism.
The system for cleaning graphite in the riser of the coke oven and recovering the waste heat of the raw coke oven gas as claimed in any one of claims 1 to 6, wherein the waste heat recovery device is a steam drum or a heat transfer oil steam generator.
The system for cleaning graphite in the riser of the coke oven and recovering the waste heat of the raw coke oven gas as claimed in any one of claims 1 to 6, wherein the transmission device comprises a transmission chain, a gearbox, a transmission gear and a rotary gear disc;
the transmission chain is connected with the gearbox, the output end of the gearbox is connected with the transmission gear, the transmission gear is meshed with the rotary gear disc, and the rotating shaft of the rotary turbulence scraper is fixedly connected with the center of the rotary gear disc.
The method of claim 9 for cleaning graphite risers of coke ovens and recovering waste heat from raw gas by using the system of any one of claims 1 to 8, characterized in that it comprises: arranging the riser root heat exchange device outside the crude gas channel, arranging the rotary turbulent flow scrapers in the inner cavity of the crude gas channel, the inner cavity of the straight pipe section of the riser and the inner cavity of the bridge pipe, connecting a heat exchanger of the riser root heat exchange device with the waste heat recovery device, and connecting a rotating shaft of the rotary turbulent flow scrapers with the transmission device;
the heat exchanger cools and exchanges heat of the crude gas in the crude gas channel, the transmission mechanism drives the rotating shaft of the rotating turbulence scraper to rotate, the rotating shaft drives the turbulence blades to rotate, the turbulence blades can guide the crude gas positioned in the center of the crude gas channel to the heat exchange surface of the crude gas channel and the riser root heat exchange device, the turbulence blades drive the scraper to rotate in the rotating process to scrape off graphite coked on the inner wall of the crude gas channel, the inner wall of the riser straight pipe section and the inner wall of the bridge pipe, and the working medium in the heat exchanger cools and exchanges heat of the crude gas.
Obviously, the heat exchange device at the root of the ascending tube can be unreasonably designed; the arrangement of the inserted crude gas waste heat recovery device makes the method of the invention unable to realize the function of rotating the rotating shaft of the rotating turbulent flow scraper, and thus, the method of claim 9 cannot be realized by adopting the system of any one of claims 1 to 8 to clean the graphite of the ascension pipe of the coke oven and recover the waste heat of the crude gas.
In conclusion, all the graphite removing devices for the ascending pipes of the coke oven have a plurality of technical difficulties and pains:
firstly, the structure is too complex, and the functions and the method cannot be realized on the premise that the ascending pipe side wall heat exchanger and the inserted heat exchanger exist simultaneously;
secondly, the 'chain' transmission flexible shaft made of thin steel sheets is not connected in the ascending pipe under high-temperature and high-temperature corrosion environment, and no engineering application exists in engineering practice;
the coke cleaning function in the ascending pipe with the inserted waste heat recovery device inside can not be realized;
the key parts of coking in the operation process of the coke oven are coking at the fire hole of the ascending pipe tube seat of the coke oven and coking of a root channel of the ascending pipe at the tube seat of the ascending pipe, which can not realize on-line coke cleaning of the ascending pipe of the coke oven;
the online coke cleaning device has the problem of coking and coke hanging, and the problem of coking of the online coke cleaning device does not solve the problem of coke cleaning;
and once the integral ascending pipe is damaged, the integral ascending pipe needs to be replaced, and the manufacturing cost, the operation cost and the maintenance cost are high. Therefore, it is necessary to design an on-line coke cleaning ascending pipe of a coke oven and an on-line coke cleaning method thereof.
Disclosure of Invention
Aiming at the situation and overcoming the defects of the prior art, the invention provides the on-line coke cleaning ascending pipe of the coke oven and the on-line coke cleaning method thereof, the invention has novel structure and ingenious conception, and proposes that the main part of coking in the operation process of the coke oven is coking at the mouth of the ascending pipe socket of the coke oven and coking at the root channel of the ascending pipe at the pipe socket of the ascending pipe to realize the on-line coke cleaning of the ascending pipe of the coke oven, thereby solving the problems of coking and coke hanging of the on-line coke cleaning device and the problem of coking of the on-line coke cleaning device which does not solve the problem of coke cleaning.
In order to achieve the purpose, the invention provides the following technical scheme: the on-line coke cleaning ascending tube of the coke oven comprises a coke oven body, a ascending tube seat, an ascending tube, a ascending tube tee joint, an on-line coke cleaning driving device, an inserted butt joint section, an ascending tube water sealing cover, a heat extractor in the ascending tube, a coke cleaning driving screw, a coke cleaning device, a support, a tube seat coke cleaning device and a coke oven mouth coke cleaning device, wherein the ascending tube seat is installed at the position of a fire mouth of the coke oven body, the ascending tube is installed on the ascending tube seat, the ascending tube tee joint is installed on one side of the top of the ascending tube, the ascending tube water sealing cover is fixed at the top of the ascending tube, the upper end and the lower end of the inserted butt joint section are in modular connection with a flange bolt in the ascending tube through flange connection, and the operation can be realized, and the operation of inserting and extracting can be realized, and the operation of the on-line coke cleaning driving device, the heat extractor in the ascending tube, the coke cleaning driving screw, the coke cleaning device, the support, the coke cleaning driving device, The tube seat coke cleaning device and the coke oven mouth coke cleaning device are assembled on the inserted butt joint section to form a whole inserted modular structure;
the online decoking driving device comprises a driving motor, a driving worm supporting device and a driving worm, the driving motor is in driving connection with the driving worm movably connected to the driving worm supporting device, and the driving motor is a pneumatic motor;
the heat remover in the ascending pipe comprises a working medium outlet pipe, an outlet collecting pipe, a working medium outlet heat exchange pipe, a working medium inlet pipe, an inlet collecting pipe and a working medium heat exchange pipe, wherein the working medium heat exchange pipe is arranged in the ascending pipe;
the tube seat decoking device comprises a first fixing ring, a first chain and a first decoking hammer, wherein the first fixing ring is symmetrically arranged on the decoking driving screw rod at a position corresponding to the tube seat of the ascending tube, and the first fixing ring is connected with the first decoking hammer through the first chain;
the coke oven mouth coke cleaning device comprises a second fixing ring, a second chain and a second coke cleaning hammer, wherein the second fixing ring is fixed at the bottom end of the coke cleaning driving screw, and the second fixing ring is fixed with the second coke cleaning hammer through the second chains which are symmetrically distributed.
The decoking driving screw rod adopts two technical schemes which are respectively as follows:
the first embodiment is as follows: the decoking driving screw comprises an internal cooling system: including outer tube formula lead screw pipe, driven drive turbine, interior support bearing, interior cooling outer tube and interior cooling inner tube, outer tube formula lead screw pipe rotates the inside in tedge through interior support bearing, and the bottom mounting of outer tube formula lead screw pipe has the support, install the driven drive turbine who is connected with drive worm meshing on the outer tube formula lead screw pipe, the inside of outer tube formula lead screw pipe is provided with the interior cooling inner tube, and the entry access entry collecting tube of interior cooling inner tube, the outside of outer tube formula lead screw pipe is provided with the interior cooling outer tube, and the export of interior cooling outer tube inserts the export collecting tube, outer tube formula lead screw pipe and coke cleaning device drive connection, be provided with "8" font screw on the outer tube.
Example two: the decoking drive screw is free of an internal cooling system: including no cooling screw pipe, driven drive turbine and support bearing, no cooling screw pipe passes through support bearing and rotates the inside in tedge, and the bottom mounting of outer tube formula screw pipe has the support, install the driven drive turbine who is connected with the drive worm meshing on the screw pipe, outer tube formula screw pipe and coke cleaning device drive are connected, be provided with "8" font screw thread on the no cooling screw pipe.
The coke cleaning device adopts two technical schemes which are respectively as follows:
the first embodiment is as follows: the decoking device is connected with the screw rod sliding block through a rib plate, the screw rod sliding block slides on the outer sleeve type screw rod pipe, a decoking hole allowing the trial insertion type heat exchange pipe to pass through in a clearance fit mode is formed in the rib plate, an upper annular ratchet decoking wheel and a lower annular ratchet decoking wheel which are provided with ratchet full rings are arranged at the tail end of the rib plate, and the upper layer and the lower layer of the double annular ratchet decoking wheel are staggered.
Example two: the decoking device is connected with the screw rod sliding block through a rib plate, the screw rod sliding block slides on the outer sleeve type screw rod pipe, a decoking hole through which the trial insertion type heat exchange pipe can pass in clearance fit is formed in the rib plate, a decoking ring is arranged at the tail end of the rib plate, and the decoking ring is in clearance fit with the inner diameter of the ascending pipe.
Furthermore, the lengths of the first chain and the second chain are larger than the inner diameter of the ascending pipe, and the length of the second chain is larger than the diameter of a fire hole of the coke oven body.
Furthermore, the first coke cleaning hammer is a heat-resistant rod, the connecting position of the first coke cleaning hammer and the first chain is that the length of the lower section of the connecting point is greater than or equal to that of the upper section, the second coke cleaning hammer is a heat-resistant rod or a heat-resistant ball, and the connecting position of the second coke cleaning hammer and the second chain is located at the top end of the second coke cleaning hammer.
Furthermore, a waste heat recovery device is arranged on the pipe wall of the ascending pipe.
An on-line coke cleaning method for an on-line coke cleaning ascending tube of a coke oven comprises a heat recovery heat exchanger of a tube wall of the ascending tube, an inner inserted heat exchanger and a coke cleaning device driven by a coke cleaning driving screw rod, wherein the inner inserted heat exchanger, the coke cleaning driving screw rod and the on-line coke cleaning driving device are combined into a modularized inner inserted device, an 8-shaped thread is arranged on an outer sleeve type lead screw tube, the on-line coke cleaning driving device drives a driving worm and a driven driving turbine to drive the lead screw tube to rotate, so that the rotating lead screw tube drives a lead screw slider on a lead screw of the lead screw tube to move up and down, and the lead screw slider drives a lead screw slider on the lead screw to move up and downThe coke cleaning device is fixedly connected with the coke cleaning device and drives the coke cleaning device to move up and down, the coke cleaning device is in clearance fit with the inner diameter of the ascending pipe and drives the coke cleaning device to move up and down in the ascending pipe, coking or dust on the surfaces of the ascending pipe and the inserted heat exchange pipe is taken away by crude gas airflow, and the process can be simultaneously operated in the production process of the coke oven so as to realize on-line coke cleaning; the lower part of the decoking driving screw is respectively provided with a first decoking hammer and a second decoking hammer which are in flexible connection with a first chain and a second chain, the decoking method is that the decoking driving screw rotates to drive the first decoking hammer and the second decoking hammer at the far ends of the first chain and the second chain to rotate, the first decoking hammer and the second decoking hammer which have coking respectively generate friction collision type relative motion with a riser tube seat and a coke oven mouth by the aid of centrifugal force generated by rotation, decoking action is realized, and the rotating angular speed of a rod which drives the first decoking hammer and the second decoking hammer to rotate is equal to that of the rotating angular speed of the rod
The interval of the rotational angular speeds of the first coke cleaning hammer and the second coke cleaning hammer driven by the rotation of the coke cleaning driving screw is
And even omega =0, the first coke cleaning hammer and the second coke cleaning hammer as well as the ring sections of the first chain and the second chain are made to droop to generate mutual friction and collision so as to realize self coke cleaning, wherein omega is the rotation angular velocity of the screw rod, l is the length of the chain, and r is the inner diameter of the ascending pipe, so that coke on the pipe seat of the ascending pipe and the mouth of the coke oven is cleaned in time, and online coke cleaning is realized.
Furthermore, the screw rod sliding block can adopt a two-half structure to realize quick installation; a section of filling type 8-shaped lower section structure of the thread groove can be adopted to realize the installation of the lower end of the screw rod sliding block; or the lower end of the lower section of the two sections of 8-shaped wire grooves is grooved to the bottom, then the lower section of the lower arc wire grooves of the two sections of 8-shaped wire grooves are formed at the proper position after the lower section of the lower arc wire grooves is moved upwards, the transition grooves of the lower arc wire grooves of the two sections of 8-shaped wire grooves are formed, and the lower arc wire grooves of the two sections of 8-shaped wire grooves are sealed after the screw rod sliding block is installed, so that the lower end of the screw rod sliding block is installed, and the sliding block is prevented from moving downwards excessively.
The invention has the beneficial effects that:
1. the structure is simple, and the turbine worm of the air motor is internally cooled;
2. the outer sleeve type screw pipe for cooling realizes the function realization in the ascending pipe with high temperature;
3. the on-line coke cleaning function of the ascending pipe with the inserted waste heat recovery device inside can be well solved;
4. the coke oven ascending pipe on-line coke cleaning is realized by coke oven ascending pipe on-line coke cleaning through coke oven ascending pipe nozzle coking and ascending pipe root channel coking;
5. the problem of on-line coke cleaning device self have the coking hang the burnt, and the coking problem of its line coke cleaning device self does not solve the coke cleaning problem.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural principle diagram of an on-line coke cleaning ascending pipe and an on-line coke cleaning method thereof of a coke oven of the invention;
FIG. 2 is a schematic view of the structure of the on-line decoking driving device of the present invention;
FIG. 3 is a schematic view of the structural principle of the decoking device and a plane structure of an embodiment of the decoking drive screw according to the present invention;
FIG. 4 is a schematic diagram of the structural principle of the coke cleaning device and a two-plane structure of an embodiment of the coke cleaning driving screw according to the present invention;
FIG. 5 is a schematic plan view of the tube seat coke cleaning device and the coke oven mouth coke cleaning device of the present invention;
FIG. 6 is a schematic view of a planar structure of an embodiment of the decoking apparatus of the present invention;
FIG. 7 is a schematic diagram of a two-plane structure of an embodiment of the decoking apparatus of the present invention;
reference numbers in the figures: 1. a coke oven body; 2. a riser seat; 3. a riser pipe; 4. a riser tee; 5. an on-line decoking drive device; 51. a drive motor; 52. a drive worm support; 53. a drive worm; 6. interpolating a butt joint section; 7. a water seal cover of the ascending pipe; 8. a heat remover in the riser; 81. a working medium outlet pipe; 82. an outlet manifold; 83. the working medium is discharged out of the heat exchange tube; 84. a working medium inlet pipe; 85. an inlet manifold; 86. a working medium is removed from the heat exchange tube; 9. a decoking drive screw; 91. an outer sleeve type lead screw pipe; 92. no cooling type screw pipe; 93. a driven drive turbine; 94. an inner support bearing; 95. cooling the outer pipe internally; 96. cooling the inner pipe internally; 10. a coke cleaning device; 101. an annular ratchet coke cleaning wheel; 102. a rib plate; 103. clearing coke holes; 104. a screw rod slide block; 105. clearing coke rings; 11. a support; 12. a tube seat decoking device; 121. a first retaining ring; 122. a first chain; 123. a first coke cleaning hammer; 13. a coke cleaning device at the mouth of the coke oven; 131. a second retaining ring; 132. a second chain; 133. a second coke cleaning hammer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, the present invention provides the following technical solutions: an on-line coke cleaning ascending pipe of a coke oven comprises a coke oven body 1, a ascending pipe seat 2, an ascending pipe 3, an ascending pipe tee joint 4, an on-line coke cleaning driving device 5, an inserted butt joint section 6, an ascending pipe water sealing cover 7, a heat extractor 8 in the ascending pipe, a coke cleaning driving screw 9, a coke cleaning device 10, a support 11, a pipe seat coke cleaning device 12 and a coke oven mouth coke cleaning device 13, wherein the ascending pipe seat 2 is installed at the oven mouth part of the coke oven body 1, the ascending pipe 3 is installed on the ascending pipe seat 2, the ascending pipe tee joint 4 is installed on one side of the top part of the ascending pipe 3, the ascending pipe water sealing cover 7 is fixed on the top part of the ascending pipe 3, the upper end and the lower end of the inserted butt joint section 6 are connected with the inner flange of the ascending pipe 3 through flanges to realize bolt modularization, the inserting and extracting operations can be realized in the operation process, the on-line coke cleaning driving device 5, the heat extractor 8 in the ascending pipe, the coke cleaning driving screw 9, The coke cleaning device 10, the bracket 11, the tube seat coke cleaning device 12 and the coke oven mouth coke cleaning device 13 are assembled on the inserted butt joint section 6 to form a whole inserted modular structure, so that the system function of the line cleaning device is realized;
the online coke cleaning driving device 5 comprises a driving motor 51, a driving worm support device 52 and a driving worm 53, the driving motor 51 is in driving connection with the driving worm 53 movably connected to the driving worm support device 52, the driving motor 51 is a pneumatic motor, the technical problem that the high-temperature environment of a furnace area cannot use electric power is solved by selecting the pneumatic motor, the pneumatic motor has an automatic air cooling effect so that the structure is simple, the manufacturing cost is reduced, the working stability is good, the working condition of high temperature in a coke oven ascending pipe is well adapted, and the simple motion steering in the high-temperature ascending pipe is realized by using a turbine worm transmission high-temperature-resistant shaft;
the heat extractor 8 in the ascending pipe comprises a working medium outlet pipe 81, an outlet collecting pipe 82, a working medium outlet heat exchange pipe 83, a working medium inlet pipe 84, an inlet collecting pipe 85 and a working medium heat exchange pipe 86, wherein the working medium heat exchange pipe 86 is arranged inside the ascending pipe 3, the inlet of the working medium heat exchange pipe 86 is connected with the working medium inlet pipe 84 through the inlet collecting pipe 85, the working medium inlet pipe 84 is connected with the working medium heat exchange pipe 83, the outlet of the working medium heat exchange pipe 86 is connected with the outlet collecting pipe 82, and the outlet collecting pipe 82 is connected with the working medium outlet pipe 81;
the tube seat decoking device 12 comprises a first fixing ring 121, a first chain 122 and a first decoking hammer 123, wherein the first fixing ring 121 is symmetrically arranged on the decoking driving screw 9 at a position corresponding to the tube seat 2 of the ascending tube, and the first fixing ring 121 is connected with the first decoking hammer 123 through the first chain 122;
the coke oven mouth coke cleaning device 13 comprises a second fixing ring 131, a second chain 132 and a second coke cleaning hammer 133, the second fixing ring 131 is fixed at the bottom end of the coke cleaning driving screw 9, and the second fixing ring 131 is fixed with the second coke cleaning hammer 133 through the second chain 132 which is symmetrically distributed.
The decoking driving screw 9 adopts two technical schemes which are respectively as follows:
the first embodiment is as follows: the decoking driving screw 9 comprises an internal cooling system: the outer sleeve type screw tube 91 rotates inside an ascending tube 3 through the inner support bearing 94, a support 11 is fixed at the bottom end of the outer sleeve type screw tube 91, the outer sleeve type screw tube 91 is provided with the driven drive turbine 93 meshed and connected with a drive worm 53, the inner cooling inner tube 96 is arranged inside the outer sleeve type screw tube 91, an inlet of the inner cooling inner tube 96 is connected into an inlet collecting tube 85, the outer side of the outer sleeve type screw tube 91 is provided with the inner cooling outer tube 95, an outlet of the inner cooling outer tube 95 is connected into an outlet collecting tube 82, the outer sleeve type screw tube 91 is in driving connection with a coke cleaning device 10, 8-shaped threads are arranged on the outer sleeve type screw tube 91, and upward movement of the coke cleaning device 10 driven by a screw rod sliding block can be changed into downward movement without changing the steering direction of the outer sleeve type screw tube 91, the downward movement of the decoking device 10 driven by the screw rod sliding block is changed into upward movement without changing the steering of the outer sleeve type screw rod pipe 91, an inner cooling inner pipe 96 is arranged inside the outer sleeve type screw rod pipe 91, the inner cooling inner pipe 96 cools the outer sleeve type screw rod pipe 91, the metal temperature of the outer sleeve type screw rod pipe 91 is reduced, and the inner cooling inner pipe 96 rotates as an axis inside the outer sleeve type screw rod pipe 91.
Example two: the decoking drive screw 9 is free of an internal cooling system: comprises a non-cooling threaded pipe 92, a driven driving turbine 93 and a supporting bearing 94, wherein the non-cooling threaded pipe 92 rotates inside the ascending pipe 3 through the supporting bearing 94, and the bottom end of the outer sleeve type screw tube 91 is fixed with a bracket 11, the screw tube 91 is provided with a driven driving turbine 93 engaged with the driving worm 53, the outer sleeve type screw tube 91 is connected with the coke cleaning device 10 in a driving way, the uncooled type screw tube 92 is provided with 8-shaped threads, the upward movement of the coke cleaning device 10 driven by the screw rod sliding block can be changed into the downward movement without changing the direction of the uncooled screw rod tube 921, the downward movement of the decoking device 10 driven by the screw rod sliding block can be changed into the upward movement without changing the steering direction of the non-cooling screw rod pipe 92, an internal cooling system is arranged in the non-cooling screw rod pipe 92, and the decoking driving screw 9 with the internal cooling system or the decoking driving screw 9 without the internal cooling system can be freely selected according to actual requirements during use.
The coke cleaning device 10 adopts two technical schemes, which are respectively as follows:
the first embodiment is as follows: the decoking device 10 is connected with a screw rod slide block 104 by a rib plate 102, the screw rod slide block 104 slides on an outer sleeve type screw rod pipe 91, the rib plate 102 is provided with a decoking hole 103 which can be matched with and passed through by an in-test insertion type heat exchange pipe in a clearance way, the tail end of the rib plate 102 is provided with an annular ratchet decoking wheel 101 with an upper layer and a lower layer provided with a ratchet full ring, and the upper layer and the lower layer of the annular ratchet decoking wheel 101 with the double layers are mutually staggered.
Example two: the decoking device 10 is connected with a screw rod slide block 104 by a rib plate 102, the screw rod slide block 104 slides on an outer sleeve type screw rod pipe 91, the rib plate 102 is provided with a decoking hole 103 through which an inserted heat exchange pipe can pass in clearance fit, the tail end of the rib plate 102 is provided with a decoking ring 105, and the decoking ring 105 is in clearance fit with the inner diameter of the ascending pipe 3.
Further, the length of the first chains 122 and the second chains 132 is greater than the inner diameter of the riser 3, and the length of the second chains 132 is greater than the mouth diameter of the coke oven vessel 1.
Further, the first decoking hammer 123 is a heat-resistant rod, the connection position of the first decoking hammer 123 and the first chain 122 is that the length of the lower section of the connection point is greater than or equal to the length of the upper section, the second decoking hammer 133 is a heat-resistant rod or a heat-resistant ball, the connection position of the second decoking hammer 133 and the second chain 132 is located at the top end of the second decoking hammer 133, and the type of the second decoking hammer 133 can be freely installed according to actual installation and use requirements.
Further, a waste heat recovery device is installed on the pipe wall of the ascending pipe 3.
An on-line coke cleaning method for an on-line coke cleaning ascending tube of a coke oven comprises a heat recovery heat exchanger of a tube wall of the ascending tube, an inner inserted heat exchanger and a coke cleaning device driven by a coke cleaning driving screw rod, wherein the inner inserted heat exchanger, the coke cleaning driving screw rod and the on-line coke cleaning driving device are combined into a modularized inner inserted device, an 8-shaped thread is arranged on an outer sleeve type lead screw tube, the on-line coke cleaning driving device drives a driving worm and a driven driving turbine to drive the lead screw tube to rotate, so that the rotating lead screw tube drives a lead screw slider on a lead screw of the lead screw tube to move up and down, and the lead screw slider drives a lead screw slider on the lead screw to move up and downThe coke cleaning device is fixedly connected with the coke cleaning device and drives the coke cleaning device to move up and down, the coke cleaning device is in clearance fit with the inner diameter of the ascending pipe and drives the coke cleaning device to move up and down in the ascending pipe, coking or dust on the surfaces of the ascending pipe and the inserted heat exchange pipe is taken away by crude gas airflow, and the process can be simultaneously operated in the production process of the coke oven so as to realize on-line coke cleaning; the lower part of the decoking driving screw is respectively provided with a first decoking hammer and a second decoking hammer which are in flexible connection with a first chain and a second chain, the decoking method is that the decoking driving screw rotates to drive the first decoking hammer and the second decoking hammer at the far ends of the first chain and the second chain to rotate, the first decoking hammer and the second decoking hammer which have coking respectively generate friction collision type relative motion with a riser tube seat and a coke oven mouth by the aid of centrifugal force generated by rotation, decoking action is realized, and the rotating angular speed of a rod which drives the first decoking hammer and the second decoking hammer to rotate is equal to that of the rotating angular speed of the rod
The interval of the rotational angular speeds of the first coke cleaning hammer and the second coke cleaning hammer driven by the rotation of the coke cleaning driving screw is
And even omega =0, the first coke cleaning hammer, the second coke cleaning hammer and the intermediate ring sections of the first chain and the second chain are made to droop to generate mutual friction collision so as to realize self coke cleaning, wherein omega is the rotation angular velocity of the screw rod, l is the length of the chain, r is the inner diameter of the ascending pipe, coke on the pipe seat of the ascending pipe and the mouth of the coke oven is cleaned in time, and online coke cleaning is realized, wherein preferably omega =0, namely intermittent online coke cleaning is realized, and at the intermittent moment, the crude gas can scour the coke hammer prevention system, so that the self coke cleaning of the system can be better realized.
Furthermore, the screw rod sliding block can adopt a two-half structure to realize quick installation; a section of filling type 8-shaped lower section structure of the thread groove can be adopted to realize the installation of the lower end of the screw rod sliding block; or the lower end of the lower section of the two sections of 8-shaped wire grooves is grooved to the bottom, then the lower section of the lower arc wire grooves of the two sections of 8-shaped wire grooves are formed at the proper position after the lower section of the lower arc wire grooves is moved upwards, the transition grooves of the lower arc wire grooves of the two sections of 8-shaped wire grooves are formed, and the lower arc wire grooves of the two sections of 8-shaped wire grooves are sealed after the screw rod sliding block is installed, so that the lower end of the screw rod sliding block is installed, and the sliding block is prevented from moving downwards excessively.
The invention has the beneficial effects that:
1. the structure is simple, and the turbine worm of the air motor is internally cooled;
2. the outer sleeve type screw pipe for cooling realizes the function realization in the ascending pipe with high temperature;
3. the on-line coke cleaning function of the ascending pipe with the inserted waste heat recovery device inside can be well solved;
4. the coke oven ascending pipe on-line coke cleaning is realized by coke oven ascending pipe on-line coke cleaning through coke oven ascending pipe nozzle coking and ascending pipe root channel coking;
5. the problems of coking and coke hanging of the online coke cleaning device are solved, and the problem of coke cleaning of the online coke cleaning device is not solved;
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a coke oven is clear burnt tedge on line, includes coke oven furnace body (1), tedge tube socket (2), tedge (3), tedge tee bend (4), clear burnt drive arrangement (5) on line, interpolation butt joint section (6), tedge water closing cap (7), in the tedge heat collector (8), clear burnt drive screw (9), clear burnt device (10), support (11), tube socket clear burnt device (12) and coke oven fire door coke cleaning device (13), its characterized in that: an ascending pipe base (2) is installed at a fire hole of the coke oven body (1), an ascending pipe (3) is installed on the ascending pipe base (2), an ascending pipe tee joint (4) is installed on one side of the top of the ascending pipe (3), a ascending pipe water sealing cover (7) is fixed at the top of the ascending pipe (3), the upper end and the lower end of the inserted butt-joint section (6) are connected with an internal flange of the ascending pipe (3) through flanges to realize bolt modularization, and insertion and extraction operations can be realized in the operation process, and the online coke cleaning driving device (5), the heat collector (8) in the ascending pipe, the coke cleaning driving screw rod (9), the coke cleaning device (10), the support (11), the pipe base coke cleaning device (12) and the coke oven fire hole coke cleaning device (13) are assembled on the inserted butt-joint section (6) to form a whole inserted modularization structure;
the online decoking driving device (5) comprises a driving motor (51), a driving worm supporting device (52) and a driving worm (53), the driving motor (51) is in driving connection with the driving worm (53) movably connected to the driving worm supporting device (52), and the driving motor (51) is a pneumatic motor;
the heat extractor (8) in the ascending pipe comprises a working medium outlet pipe (81), an outlet collecting pipe (82), a working medium outlet heat exchange pipe (83), a working medium inlet pipe (84), an inlet collecting pipe (85) and a working medium outlet heat exchange pipe (86), wherein the working medium outlet heat exchange pipe (86) is arranged inside the ascending pipe (3), the inlet of the working medium outlet heat exchange pipe (86) is connected with the working medium inlet pipe (84) through the inlet collecting pipe (85), the working medium inlet pipe (84) is connected with the working medium outlet heat exchange pipe (83), the outlet of the working medium outlet heat exchange pipe (86) is connected with the outlet collecting pipe (82), and the outlet collecting pipe (82) is connected with the working medium outlet pipe (81);
the decoking device (12) for the tube seat comprises a first fixing ring (121), a first chain (122) and a first decoking hammer (123), wherein the first fixing ring (121) is symmetrically arranged on the decoking driving screw rod (9) at a position corresponding to the tube seat (2) of the ascending tube, and the first fixing ring (121) is connected with the first decoking hammer (123) through the first chain (122);
the coke oven mouth coke cleaning device (13) comprises a second fixing ring (131), a second chain (132) and a second coke cleaning hammer (133), the second fixing ring (131) is fixed at the bottom end of the coke cleaning driving screw (9), and the second fixing ring (131) is fixed with the second coke cleaning hammer (133) through the second chain (132) which is symmetrically distributed.
2. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: the decoking driving screw (9) comprises an internal cooling system: including outer tube-type screw pipe (91), driven drive turbine (93), interior support bearing (94), interior cooling outer tube (95) and interior cooling inner tube (96), outer tube-type screw pipe (91) rotates the inside in tedge (3) through interior support bearing (94), and the bottom mounting of outer tube-type screw pipe (91) has support (11), install on outer tube-type screw pipe (91) and drive worm (53) meshing connection's driven drive turbine (93), the inside of outer tube-type screw pipe (91) is provided with interior cooling inner tube (96), and the entry access entry collecting pipe (85) of interior cooling inner tube (96), the outside of outer tube-type screw pipe (91) is provided with interior cooling outer tube (95), and the export access export collecting pipe (82) of interior cooling outer tube (95), outer tube-type screw pipe (91) and coke cleaning device (10) drive connection, the outer sleeve type screw pipe (91) is provided with 8-shaped threads.
3. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: the decoking driving screw (9) does not contain an internal cooling system: including no cooling screw pipe (92), driven drive turbine (93) and support bearing (94), no cooling screw pipe (92) rotate the inside in tedge (3) through support bearing (94), and the bottom mounting of outer tube formula screw pipe (91) has support (11), install on screw pipe (91) and drive driven drive turbine (93) of worm (53) meshing connection, outer tube formula screw pipe (91) and coke cleaning device (10) drive connection, be provided with "8" font screw on no cooling screw pipe (92).
4. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: the decoking device (10) is connected with a screw rod sliding block (104) through a rib plate (102), the screw rod sliding block (104) slides on an outer sleeve type screw rod pipe (91), a decoking hole (103) capable of allowing an inserted heat exchange pipe to pass through in a clearance fit mode is formed in the rib plate (102), an upper layer and a lower layer of annular ratchet decoking wheels (101) with full ratchet rings are arranged at the tail end of the rib plate (102), and the upper layer and the lower layer of the double-layer annular ratchet decoking wheels (101) are staggered mutually.
5. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: the decoking device (10) is connected with a screw rod sliding block (104) through a rib plate (102), the screw rod sliding block (104) slides on an outer sleeve type screw rod pipe (91), a decoking hole (103) capable of allowing an inserted heat exchange pipe to pass through in a clearance fit mode is formed in the rib plate (102), a decoking ring (105) is arranged at the tail end of the rib plate (102), and the decoking ring (105) is in clearance fit with the inner diameter of an ascending pipe (3).
6. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: the length of the first chain (122) and the second chain (132) is larger than the inner diameter of the ascending pipe (3), and the length of the second chain (132) is larger than the diameter of the fire hole of the coke oven body (1).
7. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: the first coke cleaning hammer (123) is a heat-resistant rod, the connecting position of the first coke cleaning hammer (123) and the first chain (122) is the length of the lower section of the connecting point or more than or equal to the length of the upper section, the second coke cleaning hammer (133) is a heat-resistant rod or a heat-resistant ball, and the connecting position of the second coke cleaning hammer (133) and the second chain (132) is located at the top end of the second coke cleaning hammer (133).
8. The on-line coke cleaning ascending pipe of the coke oven according to claim 1, wherein: and a waste heat recovery device is arranged on the pipe wall of the ascending pipe (3).
9. An on-line coke cleaning method for an on-line coke cleaning ascending pipe of a coke oven is characterized in that: comprises a heat recovery heat exchanger of the riser tube wall, an inner inserted heat exchanger and a coke cleaning device driven by a coke cleaning driving screw rod, wherein the inner inserted heat exchanger, the coke cleaning driving screw rod and an online coke cleaning driving device are assembled into a modularized inner inserted device, an 8-shaped thread is arranged on an outer sleeve type screw rod tube, the online coke cleaning driving device drives the driving worm and the driven driving turbine to realize the rotation of the screw rod pipe, the rotary lead screw pipe drives a lead screw sliding block on a lead screw to move up and down, the lead screw sliding block is fixedly connected with the coke cleaning device to drive the coke cleaning device to move up and down, the coke cleaning device is in clearance fit with the inner diameter of the ascending pipe to drive the coke cleaning device to move up and down in the ascending pipe, coking or dust on the surfaces of the ascending pipe and the inserted heat exchange pipe is taken away by crude gas airflow, and the process can be simultaneously operated in the production process of the coke oven to realize on-line coke cleaning; the lower part of the decoking driving screw is respectively provided with a first decoking hammer and a second decoking hammer which are in flexible connection with a first chain and a second chain, the decoking method is that the decoking driving screw rotates to drive the first decoking hammer and the second decoking hammer at the far ends of the first chain and the second chain to rotate, the first decoking hammer and the second decoking hammer which have coking respectively generate friction collision type relative motion with a riser tube seat and a coke oven mouth by the aid of centrifugal force generated by rotation, decoking action is realized, and the rotating angular speed of a rod which drives the first decoking hammer and the second decoking hammer to rotate is equal to that of the rotating angular speed of the rod
The interval of the rotational angular speeds of the first coke cleaning hammer and the second coke cleaning hammer driven by the rotation of the coke cleaning driving screw is
Or even omega =0, the first and second coke-cleaning hammers and the first and second chainsThe inter-ring sections of the strips droop to generate mutual friction collision to realize self coke cleaning, wherein omega is the rotation angular velocity of the screw rod, l is the length of the chain, and r is the inner diameter of the ascending pipe, so that coke on the pipe seat of the ascending pipe and the mouth of the coke oven can be removed in time, and online coke cleaning is realized.
10. The on-line coke cleaning method for the coke oven on-line coke cleaning ascending pipe of the coke oven as claimed in claim 9, characterized in that: the screw rod sliding block can adopt a two-half structure so as to realize quick installation; a section of filling type 8-shaped lower section structure of the thread groove can be adopted to realize the installation of the lower end of the screw rod sliding block; or the lower end of the lower section of the two sections of 8-shaped wire grooves is grooved to the bottom, then the lower section of the lower arc wire grooves of the two sections of 8-shaped wire grooves are formed at the proper position after the lower section of the lower arc wire grooves is moved upwards, the transition grooves of the lower arc wire grooves of the two sections of 8-shaped wire grooves are formed, and the lower arc wire grooves of the two sections of 8-shaped wire grooves are sealed after the screw rod sliding block is installed, so that the lower end of the screw rod sliding block is installed, and the sliding block is prevented from moving downwards excessively.
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| CN202110352894.0A CN113150802B (en) | 2021-04-01 | 2021-04-01 | On-line coke cleaning ascending pipe of coke oven and on-line coke cleaning method thereof |
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| CN202110352894.0A CN113150802B (en) | 2021-04-01 | 2021-04-01 | On-line coke cleaning ascending pipe of coke oven and on-line coke cleaning method thereof |
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Cited By (1)
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