CN104974796A - Two-stage type entrained flow gasification furnace - Google Patents
Two-stage type entrained flow gasification furnace Download PDFInfo
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- 238000002309 gasification Methods 0.000 title claims abstract description 87
- 239000003245 coal Substances 0.000 claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000000446 fuel Substances 0.000 claims abstract description 15
- 239000006200 vaporizer Substances 0.000 claims description 73
- 239000000126 substance Substances 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 26
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000009834 vaporization Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 20
- 239000000843 powder Substances 0.000 abstract description 12
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000002737 fuel gas Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 21
- 239000002817 coal dust Substances 0.000 description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 16
- 229910052799 carbon Inorganic materials 0.000 description 11
- 239000003034 coal gas Substances 0.000 description 9
- 230000003628 erosive effect Effects 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000000567 combustion gas Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
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- 239000002028 Biomass Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
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- 239000004615 ingredient Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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Abstract
The present invention discloses a two-stage type entrained flow gasification furnace. In the prior art, under the working condition of dry coal powder entrained flow gasification, the gasification furnace with characteristics of cleaning, long service life, high concern conversion rate and high gasification reaction intensity is required to be developed. The two-stage type entrained flow gasification furnace is characterized in that the outlet of the pre-gasification chamber is obliquely inserted into the main gasification chamber, a ratio of the height from the center of the pre-gasification chamber outlet to the main gasification chamber bottom portion to the diameter of the main gasification chamber is 0.3-2:1, the included angle alpha formed by the axial line of the pre-gasification chamber and the axial line of the main gasification chamber in the vertical cross-section is 30-90 DEG, the included angle beta formed by the axial line of the pre-gasification chamber and the tangent line of the main gasification chamber in the horizontal cross-section is 30-90 DEG, the top portion of the pre-gasification chamber is provided with a coal gasification burner, and the main gasification chamber is provided with a gasification agent spraying nozzle. According to the present invention, the service life of the furnace lining is prolonged, the waste of the fuel due to the falling of the coal powder into the slag pool through the slag discharge port is reduced, and the two-stage type entrained flow gasification furnace is suitable for the occasions using the coal powder to prepare the industrial fuel gas.
Description
Technical field
The present invention relates to the solid carbon-containing fuels such as coal, biomass, refinery coke and vaporized chemical at high temperature to react and generate CO, H
2gasifying reactor field, especially a kind of two-section type airflow bed gasification furnace.
Background technology
Fine coal entrained flow bed gasification technology has clean, efficient feature, is the developing direction of coal gasification.Entrained flow bed gasification technology adopts coal dust to be raw material, particular requirement is not had to coal, almost any coal can gasify, plan under oxygen enrichment, pure oxygen environment, coal transformation efficiency is high, can reach more than 98 ~ 99%, tar is not had in the coal gas produced, other micromolecular pollutents are easy to remove, and caloric power of gas is high, can substitute the preferred fuels that Sweet natural gas becomes industrial enterprise completely.
Dry coal powder airflow bed gasification technology without the need to extra water source, pollutes little in production process in production process, can close to no pollution, and industrial scale is changeable, is adapted to various production-scale needs.Therefore, utilizing dry coal powder airflow bed gasification technology to produce clean coal gas, is the preferred manner that industrial enterprise provides producer gas plant for oneself.
Traditional entrained flow bed gasification technology mainly comes from the application of coal chemical industry, the technology introducing China is the earliest shell dry coal powder gasification technology, this technology is mainly used in large-scale coal dust gasification industry through production and application for many years, has progressively found some problems; Extensive dry coal powder gasification technology is applied in the preparation of small-scale industrial combustion gas in addition, has also occurred and extensive gasification difference problem.
One, there is localized high temperature regions near process burner, under the erosion of high temperature, furnace lining is easily burnt, and affects the continuous long period work of vapourizing furnace.Be arranged on multiple process burners of vapourizing furnace circumference, spray into oxygen and coal dust at a high speed in first burner hearth, the high temperature of nearly 2000 DEG C can be produced near burner, in stove the breeze airflow of high speed rotating drive under, erosion is formed to furnace lining.By very fast erosion water wall after furnace lining destroys, cause water wall damaged, until stop.
Two, to prepare the coal feeding amount of the pulverized coal gasification furnace in industry usually smaller for industrial combustion gas; general in the majority at 20 ~ 200 tons/day; fall far short with 1000 ~ 3000 tons of extensive coal gasification; find in the middle of actual motion that in inner of the boiler chamber lining surface, dross thickness is not enough; utilize slag film to protect the weak effect of furnace lining, furnace lining is short for work-ing life.
The semicoke particle that a part can not be gasified totally by the air-flow three, rotated in burner hearth is brought into slag bath by slag-drip opening.Find in production practice, the slag bath bottom vapourizing furnace has a large amount of coal dusts or semicoke particle, discharges vapourizing furnace together with slag particles.Namely the pulverized coal particle of these black causes the waste of coal dust, pollutes slag bath recirculated water again, causes environmental pollution.
Four, in vapourizing furnace, response intensity is uneven.Burner vicinity is large by the impact of burner jet, and kinetic energy is large and gasification reaction intensity is large, and the conversion zone gasification intensity away from burner position weakens gradually, the most weak to intensity during vapourizing furnace outlet position.Flow rotation kinetic energy in vapourizing furnace mainly leans on burner fluidic vectoring thrust, coal dust enters in burner hearth from burner, the initial stage kinetic energy of mixing is large, temperature is high, in coal particles, active part is easy to be gasified, and going deep into along with gasification reaction, semicoke particle enters into the low mixing kinetic energy region away from burner, the activity of these semicoke particles is minimum, it is the Coal Char Particles being difficult to most gasify, therefore be easy to cause the carbon residue in coal particles to can not get gasifying thoroughly, in vapourizing furnace outlet flying dust, residual carbon content is higher, have impact on coal transformation efficiency.
In sum, with under the operating mode of dry coal powder airflow bed gasification, need to develop more clean, more long life, more high carbon conversions and gasification response intensity vapourizing furnace, dry coal powder airflow bed gasification technology could be promoted widely and be applied to back yard industry combustion gas and prepare industry.
Summary of the invention
Technical problem to be solved by this invention is the defect overcoming the existence of above-mentioned prior art, provides a kind of under the operating mode of dry coal powder airflow bed gasification, possesses more clean, more long life, more high carbon conversions and gasification response intensity vapourizing furnace.
For this reason, the present invention solves above-mentioned technical problem by the following technical programs: a kind of two-section type airflow bed gasification furnace, comprises one or more pre-vaporized room and a main vaporizer, it is characterized in that,
The outlet oblique cutting of described pre-vaporized room is become owner of in vaporizer, and the height bottom the center that pre-vaporized room exports to main vaporizer and main vaporizer diameter ratio are 0.3 ~ 2:1;
On vertical section, the axis of pre-vaporized room and the angle α of main vaporizer axis are 30 ~ 90 °; On horizontal section, the angle β that the axis of pre-vaporized room and main vaporizer tangent line thereof are formed is 30 ~ 90 °;
The top of described pre-vaporized room is provided with coal gasification burner, and described main vaporizer is provided with vaporized chemical nozzle.
Two-section type airflow bed gasification furnace ensure that pre-vaporized room, main vaporizer not by high temperature erosion.Pre-vaporized room volume is little, under the drive of vaporized chemical air-flow, gas stream in the stove strength of turbulence is very large, in fuel, first active higher part gasifies, after coal gas jet enters main vaporizer, coal gas jet is because reduction reaction avoids thermal extremes, and temperature has dropped to 800 ~ 1400 DEG C under normal circumstances, avoid the erosion main vaporizer being caused to localized hyperthermia like this, make vapourizing furnace can permanently effective work.Fuel and vaporized chemical spray into from the end of pre-vaporized room, and high-temperature area concentrates on the central position of pre-vaporized room, and pre-vaporized room furnace lining also can not be subject to the erosion of high temperature; In addition, independent with main vaporizer on pre-vaporized cell structure, can change, just in case pre-vaporized room is because hot erosion causes cisco unity malfunction, also can be changed rapidly.
In structure design, because pre-vaporized room volume is little, pre-vaporized room can be designed as demountable parts, separates with main vaporizer; Pre-vaporized room is relative to main vaporizer, and working conditions rather harsh, such structure design has taken into full account the accessibility of maintenance of the equipment: when pre-vaporized room is damaged, and the pre-vaporized chamber component that can at once more renew, resumes production at once.
Described fuel is one or more the mixture in coal dust, coke powder, biomass fuel.Described vaporized chemical is one or more the mixture in air, oxygen enrichment, pure oxygen.
As improving further and supplementing technique scheme, the present invention takes following technical measures: during vapourizing furnace work, first the vaporized chemical of whole fuel and gasification total amount 30-80% carries out partial gasification in pre-vaporized room, complete the vaporization rate of 30 ~ 90%, the high temperature rough gas produced and the semicoke particle completely that do not gasify spray into main vaporizer from the outlet of pre-vaporized room with jet-like, and pre-vaporized room temperature out controls between 800 ~ 1400 DEG C; Air-flow along main vaporizer surrounding rotate and under, spiral along main vaporizer central position again after arriving bottom and up flow, discharge from the outlet at main vaporizer top; Therebetween, high temperature rough gas and the semicoke particle do not gasified mix in main vaporizer with the vaporized chemical sprayed into from vaporized chemical burner, are thoroughly gasified by the semicoke particle do not gasified, define a uniform conversion zone in main vaporizer from top to bottom.
The airflow bed gasification furnace of two-section type gasification ensure that to possess higher carbon conversion efficiency.Active ingredient in the indoor coal particles of pre-vaporized obtains and gasifies rapidly, at least complete the gasification reaction of 30 ~ 90%, relative difficult carries out main vaporizer with the semicoke particle of gasification along with coal gas jet, the semicoke particle of small particle size in coal gas, continuing, having acted on of powerful swirling eddy is gasified rapidly, larger, the semicoke particle do not gasified and ash content simultaneously rapidly catch by the slag film of melting on the wall of main vaporizer, sufficient gasification reaction is carried out under the disturbance of wall air-flow, most fuel ash defines slag and wall along main vaporizer falls into slag bath Quench, contained carbon residue is almost nil, enter flying dust residual carbon content entrained in the air-flow in slag bath on a small quantity very low, the slag particles that slag bath is discharged is clean clean.In addition, because efficiency of carbon conversion reaches more than 99.5%, in coal gas, contained flying dust is also little, greatly reduces follow-up load of dust remove.
High temperature rough gas enters in main vaporizer, along main vaporizer periphery spiral and under, because raw gas temperature is not high, significantly can reduce the erosion to furnace lining, available protecting furnace lining, increase the service life.And it is indoor in pre-vaporized, because the vaporized chemical (being generally oxygen) entering pre-vaporized indoor only accounts for 40 ~ 80% of whole vaporized chemical, therefore, pre-vaporized indoor belong to height anoxycausis, internal high temperature district temperature is obviously on the low side, is conducive to reducing the erosion to the indoor furnace lining of pre-vaporized.
Two-section type airflow bed gasification furnace ensure that in pre-vaporized room and main vaporizer have very high, uniform gasification reaction intensity.Coal dust and the preliminary gasification of vaporized chemical through pre-vaporized room, raw gas enters main vaporizer, in main vaporizer, raw gas etc. form the very high rotational flow field of swirl strength, first spiral down along main vaporizer wall, arrive after bottom main vaporizer, main vaporizer central position recircle and on, the vaporized chemical sprayed into the process burner be arranged on main vaporizer therebetween mixes mutually, thoroughly gasified by the semicoke particle do not gasified, in main vaporizer, formation defines a uniform conversion zone from top to bottom.
The flow velocity of the high temperature rough gas jet in exit, pre-vaporized room is 5 ~ 50m/s.
Described vaporized chemical nozzle has multiple, and it is arranged on below pre-vaporized room and uniform along main vaporizer surrounding; Or described vaporized chemical nozzle is arranged on below the slag-drip opening of main vaporizer, sprays into vaporized chemical vertically upward in main vaporizer.
Described pre-vaporized room adopts demountable structure to be connected with main vaporizer, facilitates pre-vaporized room to separate with main vaporizer, and maintenance of the equipment is convenient; Described pre-vaporized room is substantially cylindrical, and its head is coniform, improves the jet velocity of air-flow, adds fast response.
Described coal gasification burner comprises main burner and is arranged at least one coal nozzle on main burner outer wall,
The head of one flame detecting pipe is placed in the central position in described main burner, and the skin of flame detecting pipe is provided with blast tube, and the head of this blast tube is provided with gas jet; The skin of described blast tube is provided with combustion air passage, and the head of this combustion air passage is provided with cyclone structure, and described gas jet and cyclone structure are all placed in main burner;
The space formed between described flame detecting tube head to main burner head is settling chamber, and the length of this settling chamber is 0.2 ~ 3:1 with the ratio of main burner internal diameter;
Be provided with burning torch in described combustion wind passage, the crater of this burning torch is positioned at settling chamber, and the afterbody of flame detecting pipe is provided with flame detecting device;
During coal gasification burner work, logical cooling air in described flame detecting pipe.
During coal gasification burner work, combustion air is after the cyclone structure of combustion air passage head, with the combustion gas mixing ejected from gas jet, settling chamber produce rotate flow field carry out primary combustion, then with eddy flow shape toward jet flames in the burner hearth of main burner outside; When after the temperature reaching regulation in burner hearth, the coal dust ejected from coal nozzle mixes with from prechamber injection flame out, and ignite coal dust, takes fire in burner hearth; After coal powder ignition in burner hearth is stable, close gas supply, settling chamber cutoff, mix with from coal nozzle coal dust out in main burner outlet from settling chamber combustion air out, in burner hearth high temperature reflux flue gas igniting under, in burner hearth, realize stable burning or gasification.Described combustion air is one or several mixture of air, oxygen enrichment, pure oxygen.
Described main burner is cylindrical, and its outlet is reducing, effectively ensures that the flame sprayed in burner hearth is eddy flow shape; Described coal nozzle is arranged on main burner exit, burns, and do not burn in settling chamber after making the coal dust that ejects from coal nozzle and mixing from prechamber injection flame out in burner hearth.
The outer wall of described main burner connects at least one water-cooling channel of lowering the temperature for main burner, main burner is protected.
The swirl vane that described cyclone structure is distributed between blast tube outer side wall and combustion air passage inner side-wall by multiple circumference forms.
The beneficial effect that the present invention has is: furnace lining is 3 ~ 5 times of traditional gasification stove work-ing life, efficiency of carbon conversion can arrive more than 99.5%, in coal gas, flyash ingredient can reduce 40 ~ 70%, and reduce coal dust and fall into waste of fuel caused by slag bath by slag-drip opening, be very suitable for the occasion utilizing pulverized coal preparation industrial combustion gas; Coal gasification burner integrates vaporized state measuring ability in ignition trigger, coal dust gasification and burner hearth, and intelligence degree is high, and effectively ensure that vapourizing furnace is normal, steady operation, structure is simple simultaneously, easy to operate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the present invention's main vaporizer air current flow schematic diagram.
Fig. 4 is the structural representation of coal gasification burner of the present invention.
Fig. 5 is the schematic cross-section at coal nozzle place of the present invention.
Fig. 6 is the schematic diagram of cyclone structure of the present invention.
Embodiment
Preferred embodiment of the present invention is provided, to describe technical scheme of the present invention in detail below in conjunction with Figure of description.
Two-section type airflow bed gasification furnace as shown in Figure 1-2, be made up of multiple pre-vaporized room 1 and a main vaporizer 2, the outlet oblique cutting of described multiple pre-vaporized room 1 is become owner of in vaporizer, and the height H of center to main vaporizer 2 of its outlet is 0.3 ~ 2:1 with the ratio of main vaporizer diameter D.On vertical section, the axis of pre-vaporized room 1 and the angle α of main vaporizer 2 axis are 30 ~ 90 ゜.On horizontal section, the angle β that the axis of pre-vaporized room 1 and main vaporizer 2 tangent line thereof are formed is 30 ~ 90 ゜.
The top of pre-vaporized room 1 is provided with coal gasification burner 4, and fuel and vaporized chemical spray into the burner hearth of pre-vaporized room 1 by coal gasification burner 4, and the vaporization rate of 30 ~ 90% has been responsible in pre-vaporized room 1; Remaining gasification reaction completes in main vaporizer 2, and the flow velocity of the raw gas jet that pre-vaporized room 1 exports is 5 ~ 50m/s.
As shown in Figure 1, vaporizer 2 arranges vaporized chemical nozzle 3, and vaporized chemical nozzle 3 is arranged on below pre-vaporized room 1 exports, and uniform along main vaporizer surrounding; Also can be arranged on below main vaporizer slag-drip opening, in main vaporizer 2, spray into vaporized chemical vertically downward; Main vaporizer 2 does not arrange fuel oil atomizer.
When working as shown in Figure 3, first coal dust and vaporized chemical carry out partial gasification in pre-vaporized room 1, the high temperature rough gas produced and the semicoke particle completely that do not gasify export from pre-vaporized room 1 and spray into main vaporizer 2 with high-speed jet shape, air-flow along main vaporizer 2 surrounding rotate and under, spiral along main vaporizer central position again after arriving bottom and up flow.Discharge from the outlet at main vaporizer 2 top.Therebetween, high temperature rough gas and the semicoke particle do not gasified mix with the vaporized chemical that main vaporizer vaporized chemical burner 3 sprays into, and fully reaction further, make efficiency of carbon conversion more than 99.5%.Most fuel ash defines slag and wall along main vaporizer 2 falls into slag bath Quench, and contained carbon residue is almost nil, enters flying dust residual carbon content entrained in the air-flow in slag bath on a small quantity very low, and the slag particles that slag bath is discharged is clean clean.
According to test result, in vapourizing furnace of the present invention, furnace lining is 4.5 times of traditional gasification stove work-ing life, efficiency of carbon conversion can arrive 99.8%, in coal gas, flyash ingredient can reduce 53%, and reduce coal dust and fall into waste of fuel 32% caused by slag bath by slag-drip opening, and pre-vaporized room can be changed separately, is very suitable for the occasion utilizing pulverized coal preparation industrial combustion gas.
In addition, above-mentioned vaporized chemical is a kind of in the pure oxygen of air, the oxygen enrichment of oxygen level more than 21 ~ 90%, oxygen level 100% or appoints several mixtures; Fuel is a kind of or several mixture in coal dust, biological particles, petroleum coke powder.
The furnace lining structure of vapourizing furnace, can adopt adiabatic furnace lining structure, water wall or other heat-transfer mediums of heat conduction wet goods also can be adopted as furnace lining, can also adopt the furnace lining structure of air cooling way.
Coal gasification burner as Figure 4-Figure 6, is made up of main burner 11 and multiple coal nozzles 12 of being arranged on main burner exit.
The described cylindrical structure of main burner 11, the outlet of main burner is reducing, and the head of flame detecting pipe 15 is placed in the central position in described main burner, and the skin of flame detecting pipe 15 is provided with blast tube 16, and the head of this blast tube 16 is provided with gas jet.The skin of described blast tube 16 is provided with combustion air passage 17, and the head of this combustion air passage 17 is provided with cyclone structure 6, and described gas jet and cyclone structure 6 are all placed in main burner 11.The swirl vane 13 that described cyclone structure 6 is distributed between the outer side wall of blast tube 16 and the inner side-wall of combustion air passage 17 by multiple circumference forms, as shown in Figure 6.
The space formed between flame detecting pipe 15 head to main burner 11 head is settling chamber 7 (i.e. pre-vaporized room), and settling chamber 7 length L is 0.2 ~ 3:1 with the ratio of main burner 11 internal diameter D.
The head axes of coal nozzle 12 and the angle α of main burner 11 axis are 10 ~ 90 ゜, and the head axes of coal nozzle 12 and the angle β of main burner 11 outlet medullary ray are 0 ~ 60 ゜.
The firelock 8 that sets up an office in combustion air passage 17 ignites combustion gas, and the crater of this burning torch 8 is positioned at settling chamber 7.The outer wall of main burner 11 is provided with water-cooling channel 5, carries out cooling protection to main burner 11.
The afterbody of flame detecting pipe 15 is provided with flame detecting device 14, is connected with cooling air in flame detecting pipe 15 always, avoids hyperthermia radiation pyrolytic damage flame detecting device.
During coal gasification burner work, combustion air is after the cyclone structure 6 of combustion air passage 17 head, with the combustion gas mixing ejected from gas jet, settling chamber 7 produce rotate flow field carry out primary combustion, then with eddy flow shape toward jet flames in the burner hearth of main burner 11 outside; When after the temperature reaching regulation in burner hearth, the coal dust ejected from coal nozzle 12 mixes with the flame ejected from settling chamber 7, and ignite coal dust, takes fire in burner hearth.After coal powder ignition in burner hearth is relatively stable, close gas supply, settling chamber 7 cutoff, to export at main burner 11 from settling chamber 7 combustion air out and mix with from coal nozzle 12 coal dust out, in burner hearth high temperature reflux flue gas igniting under, in burner hearth, realize stable burning or gasification.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to structure of the present invention.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall within the scope of protection of the present invention.
Claims (10)
1. a two-section type airflow bed gasification furnace, comprises one or more pre-vaporized room (1) and a main vaporizer (2), it is characterized in that,
The outlet oblique cutting of described pre-vaporized room (1) is become owner of in vaporizer, and height and the main vaporizer diameter ratio of the center that pre-vaporized room (1) exports to main vaporizer (2) bottom are 0.3 ~ 2:1;
On vertical section, the axis of pre-vaporized room (1) and the angle α of main vaporizer (2) axis are 30 ~ 90 °; On horizontal section, the angle β that the axis of pre-vaporized room (1) and main vaporizer (2) tangent line thereof are formed is 30 ~ 90 °;
The top of described pre-vaporized room (1) is provided with coal gasification burner (4), and described main vaporizer (2) is provided with vaporized chemical nozzle (3).
2. two-section type airflow bed gasification furnace according to claim 1, it is characterized in that, during vapourizing furnace work, first the vaporized chemical of whole fuel and gasification total amount 30-80% carries out partial gasification in pre-vaporized room (1), complete the vaporization rate of 30 ~ 90%, the high temperature rough gas produced and the semicoke particle completely that do not gasify spray into main vaporizer (2) from pre-vaporized room (1) outlet with jet-like, and pre-vaporized room temperature out controls between 800 ~ 1400 DEG C; Air-flow along main vaporizer (2) surrounding rotate and under, spiral along main vaporizer central position again and up flow after arriving bottom, discharge from the outlet at main vaporizer (2) top; Therebetween, high temperature rough gas and the semicoke particle do not gasified mix in main vaporizer (2) with the vaporized chemical sprayed into from vaporized chemical burner (3), the semicoke particle do not gasified thoroughly is gasified, in main vaporizer, defines a uniform conversion zone from top to bottom.
3. two-section type airflow bed gasification furnace according to claim 1 and 2, is characterized in that, the flow velocity of the high temperature rough gas jet in pre-vaporized room (1) exit is 5 ~ 50m/s.
4. two-section type airflow bed gasification furnace according to claim 1 and 2, is characterized in that, described vaporized chemical nozzle (3) has multiple, and it is arranged on pre-vaporized room (1) below and uniform along main vaporizer surrounding.
5. two-section type airflow bed gasification furnace according to claim 1 and 2, is characterized in that, described vaporized chemical nozzle (3) is arranged on below the slag-drip opening of main vaporizer, sprays into vaporized chemical vertically upward in main vaporizer (2).
6. two-section type airflow bed gasification furnace according to claim 1, is characterized in that, described pre-vaporized room (1) adopts demountable structure to be connected with main vaporizer (2); Described pre-vaporized room (1) is substantially cylindrical, and its head is coniform.
7. two-section type airflow bed gasification furnace according to claim 1, is characterized in that, described coal gasification burner (4) comprises main burner (11) and is arranged at least one coal nozzle (12) on main burner outer wall,
The head of one flame detecting pipe (15) is placed in the central position in described main burner, and the skin of flame detecting pipe (15) is provided with blast tube (16), and the head of this blast tube (16) is provided with gas jet; The skin of described blast tube (16) is provided with combustion air passage (17), the head of this combustion air passage (17) is provided with cyclone structure (6), and described gas jet and cyclone structure (6) are all placed in main burner (11);
The space formed between described flame detecting pipe (15) head to main burner (11) head is settling chamber (7), and the length of this settling chamber (7) and the ratio of main burner (11) internal diameter are 0.2 ~ 3:1;
Burning torch (8) is provided with in described combustion wind passage (16), the crater of this burning torch (8) is positioned at settling chamber (7), and the afterbody of flame detecting pipe (15) is provided with flame detecting device (14);
During coal gasification burner work, logical cooling air in described flame detecting pipe (15).
8. two-section type airflow bed gasification furnace according to claim 7, is characterized in that, described main burner (11) is cylindrical, and its outlet is reducing; Described coal nozzle (12) is arranged on main burner (11) exit.
9. two-section type airflow bed gasification furnace according to claim 7, is characterized in that, the outer wall of described main burner (11) connects at least one water-cooling channel of lowering the temperature for main burner (5).
10. two-section type airflow bed gasification furnace according to claim 7, it is characterized in that, the swirl vane (13) that described cyclone structure (6) is distributed between blast tube (16) outer side wall and combustion air passage (17) inner side-wall by multiple circumference forms.
Priority Applications (1)
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| CN106244244A (en) * | 2016-08-22 | 2016-12-21 | 安徽科达洁能股份有限公司 | Coal gasifier |
| CN110079363A (en) * | 2019-04-04 | 2019-08-02 | 中国寰球工程有限公司 | Petroleum coke high-temperature gasification nozzle |
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| CN106244244B (en) * | 2016-08-22 | 2023-07-07 | 安徽科达洁能股份有限公司 | Coal gasification furnace |
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| CN110079363B (en) * | 2019-04-04 | 2024-02-20 | 中国寰球工程有限公司 | Petroleum coke high-temperature gasification nozzle |
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| CN104974796B (en) | 2017-08-25 |
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