CN107033940B - A kind of efficient pyrolysis of coal device and method for pyrolysis of included dedusting function - Google Patents
A kind of efficient pyrolysis of coal device and method for pyrolysis of included dedusting function Download PDFInfo
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- CN107033940B CN107033940B CN201710331859.4A CN201710331859A CN107033940B CN 107033940 B CN107033940 B CN 107033940B CN 201710331859 A CN201710331859 A CN 201710331859A CN 107033940 B CN107033940 B CN 107033940B
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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
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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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
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
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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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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Abstract
A kind of efficient pyrolysis of coal device and method for pyrolysis of included dedusting function, pyrolysis installation contains material inlet, coal gas of high temperature outlet, raw coke oven gas outlet, hot fume import, coke outlet, flue gas discharge opening, steam pumping mouth, screw feeder coal inlet device, outer sleeve, flue gas cover out, it is pyrolyzed heat exchanger tube, deep volatilization heat exchanger tube, it is pyrolyzed kiln, flue gas collection chamber, material sealing screw, central raw coke oven gas pipe, dedusting ash returning charge spiral, built-in deduster, dust outlet, flue gas inlet plenum, high-temperature coke tapping channel, discharge pipe, coal gas of high temperature gas collection discharge cover, low temperature raw coke oven gas gas gathering mask, low temperature raw coke oven gas discharge pipe and ash discharging hole, dry water is separated into discharge with pyrolysis water to realize its processing, pyrolysis section is distinguished with deep volatilization section by material sealing, solid can enter deep volatilization section by sealing device, finally obtain height Warm coke, raw coke oven gas are separated with high temperature section, pyrolysis kiln are discharged by utilidor, and realize that raw coke oven gas realizes dedusting in utilidor.
Description
Technical field
The invention belongs to the efficient pyrolysis of coal device of pyrolysis of coal technical field more particularly to a kind of included dedusting function and
Method for pyrolysis.
Background technique
In the coal proved reserves in China 55.1% be low order coal, low-order coal due to Gao Shui, high-sulfur, high ash etc. without
Method, or cannot be rationally using keeping it low, seriously polluted using efficiency directly using causing the huge wasting of resources.
For the low-order coal of height volatilization by the available upgraded coal of low temperature pyrogenation and coal tar, upgraded coal can reduce pollutant
Discharge, coal tar can be made petrol and diesel oil, the utilization efficiency of low-order coal is greatly improved.Therefore carry out low-order coal upgrading and
Classification sub-prime comprehensive utilization is to realize the grand strategy selection of Chinese coal sustainable development.
Chinese patent literature CN104927889A discloses a kind of improving quality of coal by pyrolysis integration integrated system and technique, this is
System includes sequentially connected dry thermal cracking unit, upgraded coal cooling unit and humidification discharging unit, and coal is dry in dry thermal cracking unit
Dry and pyrolysis of coal reaction is completed in the same rotating cylinder；Using cold air in cloth tubulation in upgraded coal cooling unit
Material is cooled down indirectly；The discharging unit that is humidified is during being conveyed using screw conveyor to upgraded coal, using spray
It drenches device and work of water sprinkling for better material moisture is carried out to upgraded coal.The invention opens rotating cylinder dryer section and conversion zone by expecting to insulate, coal drying
Vapor is individually extracted out, and the treating capacity of pyrolysis waste water can be reduced.Conversion zone and soaking zone are a barrel space, pyrolysis gas and
Cylinder is discharged from kiln tail also by high temperature dwell temperature section in tar vapor.Although the invention realizes pyrolysis upgrading integration, and will do
Dry moisture and pyrolysis moisture are handled respectively, reduce wastewater treatment expense.But the technique not by the gaseous product of pyrolysis section with
High temperature section is kept apart, and the time of contact of tar vapor and high temperature section is increased, and reduces the yield of tar.But the invention flue gas system
System is excessively complicated, and smoke entrance is arranged on cylinder of rotary kiln, it is difficult to ensure that the rotatory sealing effect at the position, Er Qiegan
Dry unit is flue gas and material directly contact, needs to configure fume dust remover.The dedusting that cylinder raw coke oven gas is discharged needs outside
Independent high-temperature dust removing device is arranged in portion, and high-temperature dust removing device investment is big.
Summary of the invention
To solve the above problems, the present invention provides the efficient pyrolysis of coal device and method for pyrolysis of a kind of included dedusting function,
The apparatus structure is simple, efficient, environmentally friendly, can be realized the drying, pyrolysis, deep volatilization integration of coal.It will dry water and pyrolysis water
Dry water and pyrolysis moisture other places reason are realized in separation discharge, pyrolysis section are distinguished with deep volatilization section by material sealing, solid
Deep volatilization section can be entered by sealing device, finally obtain high-temperature coke.Raw coke oven gas is separated with high temperature section, passes through insulating tube
Road discharge pyrolysis kiln, and realize that raw coke oven gas realizes dedusting in utilidor.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of efficient pyrolysis of coal device of included dedusting function, the efficient pyrolysis of coal device contain material inlet, high-temperature coal
Gas outlet, raw coke oven gas outlet, hot fume import, coke outlet, flue gas discharge opening, steam pumping mouth, screw feeder are into coal
Device, outer sleeve, go out flue gas cover, pyrolysis heat exchanger tube, deep volatilization heat exchanger tube, pyrolysis kiln, flue gas collection chamber, material sealing screw, in
Entreat raw coke oven gas pipe, dedusting ash returning charge spiral, built-in deduster, dust outlet, flue gas inlet plenum, high-temperature coke tapping channel,
Discharge pipe, coal gas of high temperature gas collection discharge cover, low temperature raw coke oven gas gas gathering mask, low temperature raw coke oven gas discharge pipe and ash discharging hole, feature
It is:
The left side of pyrolysis kiln couples flue gas cover out, out flue gas cover and pyrolysis heat exchanger tube connection, out flue gas cover and pyrolysis kiln
Inner cavity is spaced by being pyrolyzed the left side plate of heat exchanger tube, and the upper end of flue gas cover is equipped with flue gas discharge opening out and its lower end is equipped with ash discharge
Mouthful, it is pyrolyzed at the horizontal centre of kiln left end and couples outer sleeve, outer sleeve passes through flue gas cover and couples with the left side plate for being pyrolyzed heat exchanger tube
And pyrolysis kiln left side is penetrated through, it is fixed with screw feeder coal inlet device in inline connect of outer sleeve, screw feeder coal inlet device stretches to heat
It solves in kiln, the left upper end of outer sleeve is equipped with material inlet and is through to screw feeder coal inlet device upper end, and the lower-left end of outer sleeve is set
There are steam pumping mouth, the non-contact area formation water vapor channel of outer sleeve and screw feeder coal inlet device；
The nearly middle part for being pyrolyzed kiln is equipped with flue gas collection chamber, ash discharging hole also is provided in the middle part of flue gas collection chamber, with flue gas gas collection
Room is that pyrolysis kiln left part is called pyrolysis section and its right part is called deep volatilization section by vertical centre, along the heat of the pyrolysis section
It solves on kiln internal diameter distribution rings and is pyrolyzed heat exchanger tube around connection, distribution rings are waved around connection is deep along the pyrolysis kiln internal diameter of the deep volatilization section
Heat exchanger tube is sent out, couples built-in deduster along the pyrolysis kiln horizontal centre of the deep volatilization section, joins along the outer end of built-in deduster
It connects central raw coke oven gas pipe and is equipped with material sealing spiral shell in the gap adjacent with flue gas collection chamber of the outside of central raw coke oven gas pipe
It revolves and is equipped with dedusting ash returning charge spiral on the inside of it, have several perforative dust discharges in the external connection of built-in deduster
Mouthful, the right side for being pyrolyzed kiln is equipped with hot fume import, is pyrolyzed on the right end cylinder of kiln from left to right successively ring set connection high-temperature coal
Gas gas collection discharge cover, low temperature raw coke oven gas gas gathering mask, coal gas of high temperature gas collection discharge cover upper end is equipped under coal gas of high temperature outlet and its
End is equipped with coke outlet, and low temperature raw coke oven gas gas gathering mask upper end is equipped with raw coke oven gas outlet and its lower end is equipped with ash discharging hole, in heat
It solves in kiln and is equipped with discharge pipe along coal gas of high temperature gas collection discharge cover radial centre lines, it is right by special-shaped partition and deep volatilization heat exchanger tube
The connection of end face is separated out flue gas inlet plenum and high-temperature coke tapping channel, discharge pipe and coke tapping channel connection and with heat
The cylinder perforation for solving kiln, is equipped with low temperature raw coke oven gas discharge pipe along low temperature raw coke oven gas gas gathering mask radial centre lines in pyrolysis kiln, low
Warm raw coke oven gas discharge pipe and central raw coke oven gas pipe connection are simultaneously penetrated through with the cylinder of pyrolysis kiln.
The caliber of above-mentioned deep volatilization heat exchanger tube is greater than the caliber of pyrolysis heat exchanger tube, but the arrangement installation of deep volatilization heat exchanger tube is close
Degree is less than the arrangement packing density of pyrolysis heat exchanger tube.
The dedusting ash returning charge spiral that side ring is set in central raw coke oven gas pipe is in single coil configuration or more spiral coupled structures, institute
It is identical as the pyrolysis direction of rotation of kiln to state the hand of spiral, either single coil configuration or more its spiral angle of spiral coupled structure
Not less than 480 °.
The material sealing screw that the outer side ring of central raw coke oven gas pipe is set is described in single coil configuration or more spiral coupled structures
The direction of rotation of the hand of spiral and pyrolysis kiln is not on the contrary, either single coil configuration or more its spiral angle of spiral coupled structure be
Lower than 480 °, insulating layer is enclosed in the outside of central raw coke oven gas pipe.
Above-mentioned discharge pipe and low temperature raw coke oven gas discharge pipe can circumferentially be respectively configured 3~8 along pyrolysis kiln, discharge pipe and
The configuration quantity of low temperature raw coke oven gas discharge pipe is equal or unequal.
A kind of efficient pyrolysis of coal method of included dedusting function, the efficient pyrolysis of coal method are real by efficient pyrolysis of coal device
Existing, the efficient pyrolysis of coal device contains material inlet, coal gas of high temperature outlet, raw coke oven gas outlet, hot fume import, coke
Outlet, steam pumping mouth, screw feeder coal inlet device, outer sleeve, goes out flue gas cover, pyrolysis heat exchanger tube, volatilizees and change deeply flue gas discharge opening
Heat pipe, pyrolysis kiln, flue gas collection chamber, material sealing screw, central raw coke oven gas pipe, dedusting ash returning charge spiral, built-in deduster, powder
Dirt outlet, flue gas inlet plenum, high-temperature coke tapping channel, discharge pipe, coal gas of high temperature gas collection discharge cover, low temperature raw coke oven gas collection
Gas hood, low temperature raw coke oven gas discharge pipe and ash discharging hole, it is characterized in that:
Raw coal enters pyrolysis kiln by screw feeder coal inlet device by material inlet, and pyrolysis kiln left end is pyrolysis section and its right end
It is deep volatilization section, the temperature of the pyrolysis section is controlled at 400~550 DEG C, by the raw coal of the pyrolysis section by dry, pyrolysis
After generate semicoke, the semicoke enters the deep section of volatilizing by material sealing screw with the rotation of pyrolysis kiln, and the depth is waved
The temperature control of section is sent out at 600~900 DEG C, the semicoke forms material envelope in material sealing screw, and the material envelope can effectively prevent
Only raw coke oven gas enters the deep section of volatilizing, and the semicoke is precipitated residual volatiles by high-temperature heating in the deep volatilization section and becomes
Coal gas of high temperature and high-temperature coke, the high-temperature coke enter coal gas of high temperature gas collection discharge cover, the high-temperature coal by tapping channel
Gas discharges cooling by coal gas of high temperature outlet, and the high-temperature coke discharges cooling by coke outlet；
Carry half is removed by being placed in the built-in deduster of central raw coke oven gas pipe in the raw coke oven gas that the pyrolysis section generates
Burnt dust particles, the semicoke dust particles are discharged by the dust outlet set in built-in deduster, with the rotation of pyrolysis kiln
Turn to return it by dedusting ash returning charge spiral in pyrolysis kiln；
Raw coke oven gas after dedusting enters low temperature raw coke oven gas gas gathering mask by low temperature raw coke oven gas discharge pipe and passes through top famine coal
Gas outlet discharges recycling tar, and the ash discharging hole that remaining dust is arranged by lower part is periodically discharged；
The dry vapor generated of coal goes to condense by outer sleeve from the extraction of its steam pumping mouth in pyrolysis kiln, and steam pumping mouth is taken out
Quantity of steam out implements On-line Control according to CO content in vapor, reduces when CO content is more than 3~10% or stops taking out and steams
Vapour；
By heating system Lai hot fume by hot fume import enter pyrolysis kiln flue gas inlet plenum, through too deep volatilization heat exchange
Pipe, which enters flue gas collection chamber, to carry out entering back into pyrolysis heat exchanger tube after remixing uniformly, and flue gas collection chamber will be through too deep volatilization heat exchanger tube
Hot fume be sufficiently mixed, guarantee that the flue-gas temperature for entering pyrolysis heat exchanger tube is uniform, last flue gas enters flue gas cover, passes through cigarette
Gas outlet discharges waste heat recycling or desulphurization denitration, so far completes efficient pyrolysis of coal process.
Due to use technical solution as described above, the present invention generate it is following the utility model has the advantages that
1, present invention pyrolysis kiln uses flue gas collection chamber and material sealing screw that will be pyrolyzed kiln and is divided into pyrolysis section and waves deeply
Send out section.The tar steam and coal gas that pyrolysis section generates can prevent tar condensing by adding the central raw coke oven gas pipeline of heat preservation to be discharged
Or cracking, improve tar yield.The semicoke residual volatiles that pyrolysis section generates can be precipitated and obtain high quality by deep volatilization section
Coke.
2, the present invention is using the deduster in built-in central raw coke oven gas pipe, semicoke dirt contained by the raw coke oven gas that pyrolysis section is generated
Particle removes, and dirt particle is returned and is mixed into deep volatilization section in pyrolysis kiln with material, eliminates external independent deduster, drop
Low cleaner investment.
3, screw feeder coal inlet device of the present invention uses outer sleeve structure, will be pyrolyzed kiln from screw feeder coal inlet device lower end
The vapor extraction that coal dries out, reduces subsequent pyrolysis wastewater treatment capacity, reduces the investment and operating cost of waste water treatment system.
Detailed description of the invention
Fig. 1 is structure schematic diagram of the invention:
In Fig. 1: A- material inlet, B- coal gas of high temperature outlet, C- raw coke oven gas outlet, D- hot fume import, E- coke
Outlet, F- flue gas discharge opening, G- steam pumping mouth, 1- screw feeder coal inlet device, 2- outer sleeve, 3- go out flue gas cover, 4.1- pyrolysis
Heat exchanger tube, 4.2- volatilization heat exchanger tube deeply, 5- pyrolysis kiln, 6- flue gas collection chamber, 7- material sealing screw, the center 8- raw coke oven gas pipe,
9- dedusting ash returning charge spiral, 10- built-in deduster, 11- dust outlet, 12- flue gas inlet plenum, the discharging of 13- high-temperature coke are logical
Road, 14- discharge pipe, 15- coal gas of high temperature gas collection discharge cover, 16- low temperature raw coke oven gas gas gathering mask, 17- low temperature raw coke oven gas discharge pipe,
18- ash discharging hole.
Specific embodiment
The present invention is the efficient pyrolysis of coal device and method for pyrolysis of a kind of included dedusting function, and the present invention passes through efficient coal heat
Dry water is separated discharge, the dry water of realization and pyrolysis moisture other places reason with pyrolysis water by solution device, by pyrolysis section and deep volatilization section
It is distinguished by material sealing, solid can enter deep volatilization section by sealing device, finally obtain high-temperature coke.Raw coke oven gas with
High temperature section separates, and pyrolysis kiln is discharged by utilidor, and realize that raw coke oven gas realizes dedusting in utilidor.
In conjunction with Fig. 1, the efficient pyrolysis of coal device contains material inlet A, coal gas of high temperature outlet B, raw coke oven gas outlet
C, hot fume import D, coke outlet E, flue gas discharge opening F, steam pumping mouth G, screw feeder coal inlet device 1, outer sleeve 2, smoke
Gas hood 3, pyrolysis heat exchanger tube 4.1, deep volatilization heat exchanger tube 4.2, pyrolysis kiln 5, flue gas collection chamber 6, material sealing screw 7, center are waste
Gas pipe 8, dedusting ash returning charge spiral 9, built-in deduster 10, dust outlet 11, flue gas inlet plenum 12, high-temperature coke discharging are logical
Road 13, discharge pipe 14, coal gas of high temperature gas collection discharge cover 15, low temperature raw coke oven gas gas gathering mask 16, low temperature raw coke oven gas discharge pipe 17 and
Ash discharging hole 18.
In the efficient pyrolysis of coal device:
Pyrolysis kiln 5 left side couple flue gas cover 3 out, out flue gas cover 3 and pyrolysis 4.1 connection of heat exchanger tube, out flue gas cover 3 with
Pyrolysis 5 inner cavity of kiln is separated by being pyrolyzed 4.1 left side plate of heat exchanger tube, out the upper end of flue gas cover 3 equipped with flue gas discharge opening F its lower end
It equipped with ash discharging hole 18, is pyrolyzed at 5 left end horizontal centre of kiln and couples outer sleeve 2, outer sleeve 2 passes through flue gas cover 3 and pyrolysis heat exchange
4.1 left side plate of pipe and the perforation of pyrolysis 5 left end of kiln, connection is fixed with screw feeder coal inlet device 1, a left side for outer sleeve 2 in outer sleeve 2
Upper end is equipped with material inlet A and is through to 1 upper end of screw feeder coal inlet device, and the lower-left end of outer sleeve 2 is equipped with steam pumping mouth G, outside
The non-contact area of sleeve 2 and screw feeder coal inlet device 1 forms water vapor channel, and the water vapor channel is dry for extracting coal out
The vapor generated when dry reduces pyrolysis wastewater treatment capacity, reduces water process investment.
The nearly middle part for being pyrolyzed kiln 5 is equipped with flue gas collection chamber 6, and the middle part of flue gas collection chamber 6 also is provided with ash discharging hole 18, with flue gas
Collection chamber 6 is that pyrolysis 5 left part of kiln is called pyrolysis section and its right part is called deep volatilization section by vertical centre, along the pyrolysis
Radial distribution rings are pyrolyzed heat exchanger tube 4.1 around connection in the pyrolysis kiln 5 of section, the radial distribution along the pyrolysis kiln 5 of the deep volatilization section
Around the deep volatilization heat exchanger tube 4.2 of connection, the caliber of the deep heat exchanger tube 4.2 that volatilizees is greater than the caliber of pyrolysis heat exchanger tube 4.1, but deep volatilization
The arrangement packing density of heat exchanger tube 4.2 is less than the arrangement packing density of pyrolysis heat exchanger tube 4.1.
5 horizontal centre of pyrolysis kiln along the deep volatilization section couples built-in deduster 10, along the outside of built-in deduster 10
Couple central raw coke oven gas pipe 8 and to be equipped with material in the gap adjacent with flue gas collection chamber 6 of the outside of central raw coke oven gas pipe 8 close
It seals spiral 7 and is equipped with dedusting ash returning charge spiral 9 on the inside of it, the dedusting ash returning charge spiral 9 that side ring is set in central raw coke oven gas pipe 8
In single coil configuration or more spiral coupled structures, the hand of spiral is identical as the pyrolysis direction of rotation of kiln, by pyrolysis kiln 5
Rotary force provides returning charge power for it, and the dust granule that dedusting is got off returns to pyrolysis section.The outer side ring of central raw coke oven gas pipe 8 is set
Material sealing screw 7 is in single coil configuration or more spiral coupled structures, the direction of rotation phase of the hand of spiral and pyrolysis kiln
Instead, the external of central raw coke oven gas pipe 8 wraps up insulating layer, which can make the raw coke oven gas being pyrolyzed in kiln 5 be maintained at 400~500
DEG C, it prevents tar steam continuous high temperature is heated from second pyrolysis occurs, tar yield can be improved.Either single coil configuration or more
Its spiral angle of spiral coupled structure is not less than 480 °.
There are several perforative dust outlets 11 in the external connection of built-in deduster 10, the right side of pyrolysis kiln 5 is equipped with
Hot fume import D is pyrolyzed on the right end cylinder of kiln 5 from left to right successively ring set connection coal gas of high temperature gas collection discharge cover 15, low temperature
Raw coke oven gas gas gathering mask 16,15 upper end of coal gas of high temperature gas collection discharge cover is equipped with coal gas of high temperature outlet B and its lower end is arranged equipped with coke
E is exported, 16 upper end of low temperature raw coke oven gas gas gathering mask is equipped with raw coke oven gas outlet C and its lower end is equipped with ash discharging hole 18, in pyrolysis kiln 5
It is interior, it is equipped with discharge pipe 14 along 15 radial centre lines of coal gas of high temperature gas collection discharge cover, passes through special-shaped partition and deep volatilization heat exchanger tube
The connection of 4.2 right sides is separated out flue gas inlet plenum 12 and high-temperature coke tapping channel 13, and discharge pipe 14 and coke discharging are logical
Cylinder of 13 connection of road simultaneously with pyrolysis kiln 5 penetrates through, and discharge pipe 14 and low temperature raw coke oven gas discharge pipe 17 can circumferentially divide along pyrolysis kiln 5
Pei Zhi not be 3~8, the configuration quantity of discharge pipe 14 and low temperature raw coke oven gas discharge pipe 17 is equal or unequal.In heat
It solves in kiln 5, is equipped with low temperature raw coke oven gas discharge pipe 17, low temperature raw coke oven gas discharge pipe along 16 radial centre lines of low temperature raw coke oven gas gas gathering mask
17 penetrate through with central 8 connection of raw coke oven gas pipe and with the cylinder of pyrolysis kiln 5.
Under the setting of the efficient pyrolysis of coal device, efficient pyrolysis of coal method of the invention is as follows:
Raw coal enters pyrolysis kiln 5 by screw feeder coal inlet device 1 by material inlet A, and pyrolysis 5 left end of kiln is pyrolysis section and it
Right end is deep volatilization section, and the temperature of the pyrolysis section is controlled at 400~550 DEG C, by the raw coal of the pyrolysis section by it is dry,
Semicoke is generated after pyrolysis, the semicoke enters the deep section of volatilizing, institute by material sealing screw 7 with the rotation of pyrolysis kiln 5
The temperature control of deep volatilization section is stated at 600~900 DEG C, the semicoke forms material envelope in material sealing screw 7, and the material seals energy
It effectively prevent raw coke oven gas to enter the deep section of volatilizing, remaining volatilization is precipitated by high-temperature heating in the deep volatilization section in the semicoke
Dividing and becomes coal gas of high temperature and high-temperature coke, the high-temperature coke enters coal gas of high temperature gas collection discharge cover 15 by tapping channel 13,
The coal gas of high temperature discharges cooling by coal gas of high temperature outlet B, and the high-temperature coke is discharged cold by coke outlet E
But.
Carrying is removed by being placed in the built-in deduster 10 of central raw coke oven gas pipe 8 in the raw coke oven gas that the pyrolysis section generates
Semicoke dust particles, the semicoke dust particles are discharged by the dust outlet 11 set in built-in deduster 10, with pyrolysis
The rotation of kiln 5 is returned it into pyrolysis kiln by dedusting ash returning charge spiral 9.
Raw coke oven gas after dedusting enters low temperature raw coke oven gas gas gathering mask 16 by low temperature raw coke oven gas discharge pipe 17 and passes through top
Raw coke oven gas outlet C discharges recycling tar, and the ash discharging hole 18 that remaining dust is arranged by lower part is periodically discharged.
The dry vapor generated of coal goes to condense by outer sleeve 2 from its steam pumping mouth G extraction in pyrolysis kiln 5, steam pumping
The quantity of steam of mouth G extraction implements On-line Control according to CO content in vapor, reduces or stops when CO content is more than 3~10%
Steam pumping.
By heating system Lai hot fume by hot fume import D enter pyrolysis 5 flue gas inlet plenum 12 of kiln, through too deep volatilization
Heat exchanger tube 4.2 carries out entering back into pyrolysis heat exchanger tube 4.1 after remixing uniformly into flue gas collection chamber 6, and flue gas collection chamber 6 will pass through
The hot fume of deep volatilization heat exchanger tube 4.2 is sufficiently mixed, and guarantees that the flue-gas temperature for entering pyrolysis heat exchanger tube 4.1 is uniform, last flue gas
Into flue gas cover 3 out, waste heat recycling or desulphurization denitration are discharged by flue gas discharge opening F, so far complete efficient pyrolysis of coal process.
Claims (6)
1. a kind of efficient pyrolysis of coal device of included dedusting function, which contains material inlet (A), high-temperature coal
Gas outlet (B), raw coke oven gas outlet (C), hot fume import (D), coke outlet (E), flue gas discharge opening (F), steam pumping
Mouth (G), outer sleeve (2), goes out flue gas cover (3), pyrolysis heat exchanger tube (4.1), deep volatilization heat exchanger tube at screw feeder coal inlet device (1)
(4.2), kiln (5), flue gas collection chamber (6), material sealing screw (7), central raw coke oven gas pipe (8), dedusting ash returning charge spiral are pyrolyzed
(9), built-in deduster (10), dust outlet (11), flue gas inlet plenum (12), high-temperature coke tapping channel (13), discharging are slipped
Manage (14), coal gas of high temperature gas collection discharge cover (15), low temperature raw coke oven gas gas gathering mask (16), low temperature raw coke oven gas discharge pipe (17) and ash discharge
Mouth (18), it is characterized in that:
The left side of pyrolysis kiln (5) couples flue gas cover (3) out, out flue gas cover (3) and pyrolysis heat exchanger tube (4.1) connection, out flue gas
Cover (3) is spaced with pyrolysis kiln (5) inner cavity by being pyrolyzed the left side plate of heat exchanger tube (4.1), and the upper end of flue gas cover (3) is equipped with cigarette out
Gas outlet (F) and its lower end are equipped with ash discharging hole (18), are pyrolyzed at the horizontal centre of kiln (5) left end and couple outer sleeve (2), outer sleeve
(2) it passes through flue gas cover (3) to couple with the left side plate for being pyrolyzed heat exchanger tube (4.1) and penetrate through pyrolysis kiln (5) left side, in outer sleeve
(2) connection is fixed with screw feeder coal inlet device (1) in, and screw feeder coal inlet device (1) stretches in pyrolysis kiln (5), outer sleeve (2)
Left upper end be equipped with material inlet (A) and be through to screw feeder coal inlet device (1) upper end, the lower-left end of outer sleeve (2), which is equipped with, takes out
Steam port (G), the non-contact area formation water vapor channel of outer sleeve (2) and screw feeder coal inlet device (1)；
The nearly middle part for being pyrolyzed kiln (5) is equipped with flue gas collection chamber (6), also is provided with ash discharging hole (18) in the middle part of flue gas collection chamber (6), with
Flue gas collection chamber (6) is that pyrolysis kiln (5) left part is called pyrolysis section and its right part is called deep volatilization section, edge by vertical centre
Distribution rings are pyrolyzed heat exchanger tube (4.1) around connection on pyrolysis kiln (5) internal diameter of the pyrolysis section, along the pyrolysis kiln of the deep volatilization section
(5) distribution rings join around deep volatilization heat exchanger tube (4.2) of connection along pyrolysis kiln (5) horizontal centre of the deep volatilization section on internal diameter
Built-in deduster (10) are connect, couple central raw coke oven gas pipe (8) along the outer end of built-in deduster (10) and in central raw coke oven gas pipe (8)
Outside and flue gas collection chamber (6) adjacent gap in be equipped with material sealing screw (7) and be equipped with dedusting ash on the inside of it
Returning charge spiral (9) has several perforative dust outlets (11) in the external connection of built-in deduster (10), pyrolysis kiln (5)
Right side is equipped with hot fume import (D), is pyrolyzed on the right end cylinder of kiln (5) from left to right successively ring set connection coal gas of high temperature gas collection
Discharge cover (15), low temperature raw coke oven gas gas gathering mask (16), coal gas of high temperature gas collection discharge cover (15) upper end are equipped with coal gas of high temperature outlet
(B) and its lower end be equipped with coke outlet (E), low temperature raw coke oven gas gas gathering mask (16) upper end be equipped with raw coke oven gas outlet (C) and its
Lower end is equipped with ash discharging hole (18), is equipped with discharging along coal gas of high temperature gas collection discharge cover (15) radial centre lines in pyrolysis kiln (5) and slips
It manages (14), flue gas inlet plenum (12) and high temperature is separated out with deep volatilization coupling for heat exchanger tube (4.2) right side by special-shaped partition
Coke tapping channel (13), discharge pipe (14) are passed through with high-temperature coke tapping channel (13) connection and with the cylinder of pyrolysis kiln (5)
It is logical, low temperature raw coke oven gas discharge pipe (17), low temperature are equipped with along low temperature raw coke oven gas gas gathering mask (16) radial centre lines in pyrolysis kiln (5)
Raw coke oven gas discharge pipe (17) and central raw coke oven gas pipe (8) connection are simultaneously penetrated through with the cylinder of pyrolysis kiln (5).
2. the efficient pyrolysis of coal device of a kind of included dedusting function according to claim 1, it is characterized in that: deep volatilization heat exchanger tube
(4.2) caliber is greater than the caliber of pyrolysis heat exchanger tube (4.1), but the arrangement packing density of deep volatilization heat exchanger tube (4.2) is less than heat
Solve the arrangement packing density of heat exchanger tube (4.1).
3. the efficient pyrolysis of coal device of a kind of included dedusting function according to claim 1, it is characterized in that: central raw coke oven gas pipe
(8) the dedusting ash returning charge spiral (9) that interior side ring is set be in single coil configuration or more spiral coupled structures, the hand of spiral and heat
The direction of rotation for solving kiln is identical, and either single coil configuration or more its spiral angle of spiral coupled structure are not less than 480 °.
4. the efficient pyrolysis of coal device of a kind of included dedusting function according to claim 1, it is characterized in that: central raw coke oven gas pipe
(8) the material sealing screw (7) that outer side ring is set be in single coil configuration or more spiral coupled structures, the hand of spiral and pyrolysis
The direction of rotation of kiln is on the contrary, either single coil configuration or more its spiral angle of spiral coupled structure are not less than 480 °, in
The outside of centre raw coke oven gas pipe (8) is enclosed with insulating layer.
5. the efficient pyrolysis of coal device of a kind of included dedusting function according to claim 1, it is characterized in that: discharge pipe (14)
Circumferentially 3~8 can be respectively configured along pyrolysis kiln (5) with low temperature raw coke oven gas discharge pipe (17), discharge pipe (14) and low temperature famine coal
The configuration quantity of gas discharge pipe (17) is equal or unequal.
6. a kind of efficient pyrolysis of coal method of included dedusting function, the efficient pyrolysis of coal method is real by efficient pyrolysis of coal device
Existing, the efficient pyrolysis of coal device contains material inlet (A), coal gas of high temperature outlet (B), raw coke oven gas outlet (C), hot fume
Import (D), coke outlet (E), flue gas discharge opening (F), steam pumping mouth (G), screw feeder coal inlet device (1), outer sleeve (2),
Flue gas cover (3), pyrolysis heat exchanger tube (4.1), deep volatilization heat exchanger tube (4.2), pyrolysis kiln (5), flue gas collection chamber (6), material are close out
Seal spiral (7), central raw coke oven gas pipe (8), dedusting ash returning charge spiral (9), built-in deduster (10), dust outlet (11), cigarette
Gas inlet plenum (12), high-temperature coke tapping channel (13), discharge pipe (14), coal gas of high temperature gas collection discharge cover (15), low temperature are waste
Coal gas gas gathering mask (16), low temperature raw coke oven gas discharge pipe (17) and ash discharging hole (18), it is characterized in that:
Raw coal enters pyrolysis kiln (5) by screw feeder coal inlet device (1) by material inlet (A), and pyrolysis kiln (5) left end is pyrolysis section
And its right end is deep volatilization section, the temperature of the pyrolysis section is controlled at 400~550 DEG C, is passed through by the raw coal of the pyrolysis section
Semicoke is generated after dry, pyrolysis, the semicoke enters the depth by material sealing screw (7) with the rotation of pyrolysis kiln (5)
Volatilization section, the temperature control of the deep volatilization section is at 600~900 DEG C, and the semicoke is in the interior formation material of material sealing screw (7)
Envelope, the material envelope can effectively prevent raw coke oven gas and enter the deep section of volatilizing, and the semicoke adds in the deep volatilization section by high temperature
Sweat goes out residual volatiles and becomes coal gas of high temperature and high-temperature coke, the high-temperature coke by high-temperature coke tapping channel (13) into
Enter coal gas of high temperature gas collection discharge cover (15), the coal gas of high temperature discharges cooling, the high temperature by coal gas of high temperature outlet (B)
Coke discharges cooling by coke outlet (E)；
Carrying is removed by being placed in the built-in deduster (10) of central raw coke oven gas pipe (8) in the raw coke oven gas that the pyrolysis section generates
Semicoke dust particles, the semicoke dust particles are discharged by the dust outlet (11) set in built-in deduster (10), with
The rotation of pyrolysis kiln (5) is returned it into pyrolysis kiln by dedusting ash returning charge spiral (9)；
Raw coke oven gas after dedusting enters low temperature raw coke oven gas gas gathering mask (16) by low temperature raw coke oven gas discharge pipe (17) and passes through top
Raw coke oven gas outlet (C) discharges recycling tar, and the ash discharging hole (18) that remaining dust is arranged by lower part is periodically discharged；
The dry vapor generated of the interior coal of pyrolysis kiln (5) goes to condense by outer sleeve (2) from the extraction of its steam pumping mouth (G), takes out and steams
The quantity of steam of steam ports (G) extraction implements On-line Control according to CO content in vapor, reduces or stops when CO content is more than 10%
Steam pumping；
By heating system Lai hot fume by hot fume import (D) enter pyrolysis kiln (5) flue gas inlet plenum (12), waved through too deep
Hair heat exchanger tube (4.2), which enters flue gas collection chamber (6), to carry out entering back into pyrolysis heat exchanger tube (4.1), flue gas gas collection after remixing uniformly
Hot fume through too deep volatilization heat exchanger tube (4.2) is sufficiently mixed by room (6), guarantees the flue gas temperature for entering pyrolysis heat exchanger tube (4.1)
Uniformly, last flue gas enters flue gas cover (3) to degree, discharges waste heat recycling or desulphurization denitration by flue gas discharge opening (F), so far
Complete efficient pyrolysis of coal process.
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| CN110631357B (en) * | 2019-10-10 | 2023-12-26 | 白太宽 | High-efficiency external heating rotary kiln |
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