CN103436298B - Swirl injection type coal water slurry gasification device - Google Patents
Swirl injection type coal water slurry gasification device Download PDFInfo
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- CN103436298B CN103436298B CN201310397363.9A CN201310397363A CN103436298B CN 103436298 B CN103436298 B CN 103436298B CN 201310397363 A CN201310397363 A CN 201310397363A CN 103436298 B CN103436298 B CN 103436298B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000003245 coal Substances 0.000 title claims abstract description 58
- 239000002002 slurry Substances 0.000 title claims abstract description 57
- 238000002309 gasification Methods 0.000 title claims abstract description 51
- 238000002347 injection Methods 0.000 title claims abstract description 15
- 239000007924 injection Substances 0.000 title claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 60
- 239000002893 slag Substances 0.000 claims abstract description 32
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 239000002918 waste heat Substances 0.000 claims abstract description 19
- 239000003250 coal slurry Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 62
- 238000000227 grinding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000013022 venting Methods 0.000 claims description 10
- 239000003818 cinder Substances 0.000 claims description 7
- 238000010791 quenching Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004071 soot Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000003034 coal gas Substances 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000002679 ablation Methods 0.000 abstract description 2
- 239000011449 brick Substances 0.000 abstract description 2
- 238000000889 atomisation Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 10
- 230000005855 radiation Effects 0.000 description 7
- 206010020843 Hyperthermia Diseases 0.000 description 6
- 230000036031 hyperthermia Effects 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
-
- 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
Abstract
The invention relates to a swirl injection type coal water slurry gasification device, comprising a coal water slurry preparation mechanism, a gasification mechanism, a waste heat recovery mechanism and a washing mechanism, wherein the gasification mechanism comprises a gasification furnace, a coal gas outlet at the top part of the gasification furnace is connected with a chilling mechanism and a hot coal gas pipe sequentially, an adiabatic wall is arranged in the gasification furnace and extends from the top part to the lower part of the gasification furnace, a conical slag discharge hole is formed in the lower part of the adiabatic wall, a plurality of nozzles penetrating through the gasification furnace and the adiabatic wall are arranged at the middle part of the gasification furnace in the radial direction, a slag bath is arranged at the bottom of the gasification furnace, a slag crusher and a lock hopper are sequentially arranged at the bottom of the slag bath, the waste heat recovery mechanism comprises a cyclone separator connected with the hot coal gas pipe and a convection waste heat boiler connected with the cyclone separator, the washing mechanism comprises a washing tower communicated with the convective syngas cooler by a washer, and a water outlet of the washing tower is communicated with the washer by a washing pump. The swirl injection type coal water slurry gasification device solves the problems of low slurrying concentration, crown brick ablation, poor flow field, low carbon conversion rate, poor coal slurry atomization effect, large system water consumption quantity, no recovery of waste heat and the like.
Description
Technical field
The present invention relates to a kind of coal water slurry gasifying device, be specifically related to a kind of gasification installation with the high-effect coal water slurry gas of swirl injection coal water slurry and waste heat recovery function.
Background technology
At present, coal gasification divides according to the form of vapourizing furnace, mainly contains three major types: fixed bed, fluidized-bed and air flow bed.Fixed bed gasification exists high to ingredient requirement, produces pressure low, the problem that environmental pollution is large; Although it is more that fluidized-bed gasification exists quantity, engineering also exists some problems, and environmental pollution is larger; Entrained flow gasification is mainly used in Coal Chemical Industry plate at present, air flow bed principal feature is that raw material is easy to get, and adopts bituminous coal end, low in raw material price, the most important thing is that it produces pressure larger, production intensity is high, and a stove can be equivalent to tens atmospheric pressure kilns, in addition pure oxygen gasifications, gasification efficiency is higher, air flow bed temperature of reaction is high, and the feature of environmental protection is strong, belongs to clean coal utilization technology.
Entrained flow gasification is divided into coal water slurry entrained flow bed gasification and fine coal entrained flow gasification according to charging.At present, coal water slurry gasification Problems existing is that slurrying concentration is low, and in coal slurry, water content is high, and consumption systems partial heat causes effective gas output not high; Secondly, the coal water slurry gasification overwhelming majority adopts chilling process, hot coal gas directly with water cooling to about 250 degree, cause heat partly not reclaim, the low specification of direct generation containing the useless steam of sour gas, and steam is finally all put into air and is caused environmental pollution; Also have, in coal water slurry entrained flow bed gasification process, burner and vapourizing furnace flow field coordinate very important, in vapourizing furnace, the reaction medium actual residence time and burner atomizing effect directly have influence on the transformation efficiency of effective gas composition and charcoal, current coal water slurry entrained flow bed gasification flow field and burner atomizing effect poor, have influence on and further improve effective Gas content; Finally, it is large all to there is the system consumption water yield in existing coal water slurry gasifying device, the problem that efflux wastewater is many.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of Swirl injection type coal water slurry gasification, slurrying concentration in prior art is low to solve, ablation key brick, flow field is poor, efficiency of carbon conversion is low, coal slurry atomizing effect is bad, the system consumption water yield is large, used heat can not get the problems such as recovery.
For achieving the above object, the present invention takes following technical scheme: a kind of Swirl injection type coal water slurry gasification, it is characterized in that, this gasification installation comprises: a coal water slurry preparing mechanism, the one gasification mechanism be communicated with the grout outlet of described coal water slurry preparing mechanism, one waste heat recovery mechanism be communicated with described air outlet of gasifying mechanism, and the washing mechanism that is communicated with the venting port of described waste heat recovery mechanism; Wherein, described gasification mechanism comprises a vapourizing furnace, and the top of described vapourizing furnace has the gas exit of back taper, and described gas exit connects a Quench mechanism and a hot gas pipe successively; Is provided with one for blocking the diathermic wall that heat transmits according to its shape in described vapourizing furnace, described diathermic wall extends to the bottom of described vapourizing furnace by the top of described vapourizing furnace, and the bottom of described diathermic wall forms one for cinder notch under the dirty taper of slag; The middle part radial direction of described vapourizing furnace is provided with several burners running through described vapourizing furnace and diathermic wall, and burner described in each is all communicated with described coal water slurry preparing mechanism; The bottom of described vapourizing furnace is slag bath, there is the chilled water of certain liquid level in described slag bath, and the bottom of described slag bath is provided with a dregs breaker and a lock hopper successively; Described waste heat recovery mechanism comprises cyclonic separator and convection current and to give up pot; Wherein, the side, middle part of described cyclonic separator is provided with the gas inlet be connected with described hot gas pipe, and the top of described cyclonic separator is connected by the give up top of pot of pipeline and described convection current; Described convection current is given up in pot and is provided with heat transfer tube, and the give up lower side of pot of described convection current is provided with venting port; Described washing mechanism comprises washer, washing tower and washing pump; The give up venting port of pot of import and the described convection current of described washer is communicated with, and the outlet of described washer is communicated with described washing tower; The water outlet of described washing tower is divided into two-way, and a road is the inlet communication of outer draining, another road and described washing pump; Described washing pump outlet is communicated with described washer.
In a preferred embodiment, described coal water slurry preparing mechanism comprises a rough grinding machine, an atomizer mill and a coal slurry pump; The discharge port of described rough grinding machine is divided into two-way, and a road is communicated with the opening for feed of described atomizer mill, and another road is communicated with described coal slurry pump, and the discharge port of described atomizer mill is communicated with the opening for feed of described rough grinding machine; The method that described coal water slurry preparing mechanism adopts low-rank coal to prepare high-concentration coal-water slurry produces high-concentration coal-water slurry.
In a preferred embodiment, the water jacket of an annular is provided with in the described vapourizing furnace below described diathermic wall, the lower end closed of described water jacket, open upper end; Described water jacket also with described washing pump go out to be communicated with.
In a preferred embodiment, be provided with the protection chuck that can be filled with rare gas element between described vapourizing furnace and described diathermic wall, described protection chuck is the ring seal mantle cavity formed between described gasification stove internal wall and described diathermic wall.
In a preferred embodiment, described burner is that even number is symmetrical along the circumference of described vapourizing furnace, and each described burner becomes 0 ~ 60 ° of angle with the described vapourizing furnace diameter horizontal sextant angle by this burner.
In a preferred embodiment, described vapourizing furnace, diathermic wall, lower cinder notch, slag bath, dregs breaker and lock hopper present position are same axis, and in being arranged vertically from high to low.
In a preferred embodiment, the described diathermic wall thermal insulation layer that is water wall structure or is made up of high temperature material.
In a preferred embodiment, described Quench mechanism is chilling ring or jacket pipe, the bore of described chilling ring or jacket pipe and the gas exit bore of described vapourizing furnace close, described chilling ring or jacket pipe energy downstream direction are along described hot gas pipe rotary-jet chilled water.
In a preferred embodiment, described hot gas pipe is provided with several chilled water shower nozzles on different heights.
In a preferred embodiment, described convection current is given up in pot and is provided with a soot blower structure, is provided with a Venturi tube in described washer.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention adopts the coal water slurry preparing mechanism be made up of rough grinding machine, atomizer mill and coal slurry pump, and the method adopting low-rank coal to prepare high-concentration coal-water slurry produces high-concentration coal-water slurry, water coal slurry concentration 3 ~ 5% can be improved again on existing slurrying basis, thus the adding of the useless water of the system that decreases, system is more energy-conservation, and effective gas rate of output improves 2 ~ 3%.2, the present invention is evenly arranged multiple burner in the middle part circumference of vapourizing furnace, each burner is with at a certain angle by the horizontal shape of its vapourizing furnace diameter, collision is rotated after the mode of the burner charging at a certain angle of multiple different azimuth is atomized coal water slurry, thus make coal water slurry atomizing effect more even, not only can improve anoxycausis reaction efficiency, system carbon yield is lower.Meanwhile, because slag " to be got rid of " the water wall upper layer to surrounding by coal water slurry eddy flow collision rift centrifugal action, form fixing slag blanket, thus realize " with slag anti-slag " better effects if.3, the present invention is provided with cyclonic separator and convection current and gives up the waste heat recovery mechanism of pot composition after gasification mechanism.Before entering cyclonic separator, namely leave the heating gas of vapourizing furnace first through chilling ring spray cooling, heating gas pipeline is also provided with several chilled water shower nozzle, for supplementary cooling, thus ensures that slag enters waste heat recovery mechanism below safe coagulation temperature; The sensible heat that the employing of waste heat recovery mechanism has been reclaimed in heating gas further produces steam, thus system is more energy-conservation.4, the present invention is provided with protection chuck between gasification stove internal wall and water wall; operationally can not stop to add a certain amount of rare gas element in protection chuck; the rare gas element revealed enters radiation waste pot inside and mixes with coal gas; completely cut off between water wall and gasification furnace tube by rare gas element and conduct heat, thus make vapourizing furnace cylindrical shell from hyperthermia radiation.5, the present invention is provided with a Venturi tube in washer, and washing water and coal gas is abundant mixing, washing in Venturi tube, tentatively to remove macrobead lime-ash.7, be provided with multilayer tower tray in washing tower of the present invention, coal gas from bottom to top, through tower tray space, carries out sufficient heat and mass exchange with the top-down water that adds, and can by thinner ash content thorough washes clean.8, the waste water that washing tower is discharged is divided into three parts by the present invention; first part goes washer to wash coal gas as washing water through washing pump; second section goes the water jacket of vapourizing furnace to protect vapourizing furnace lower cylinder from hyperthermia radiation and maintenance slag bath stable level respectively as water coolant and moisturizing through washing pump; Part III keeps washing tower stable level as outer draining; system discharge of wastewater is only 20 ~ 30% of traditional technology; the expense of process waste water reaches and significantly reduces, and achieves energy-saving and emission-reduction.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description is carried out to the present invention.But should be appreciated that being provided only of accompanying drawing understands the present invention better, they not should be understood to limitation of the present invention.
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is the floor plan schematic diagram of auxiliary burning nozzle of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the present invention includes coal water slurry preparing mechanism 100, gasification mechanism 200, waste heat recovery mechanism 300 and washing mechanism 400.
Coal water slurry preparing mechanism 100 comprises rough grinding machine 1, atomizer mill 2 and a coal slurry pump 3.The discharge port of rough grinding machine 1 is divided into two-way, and a road is communicated with the opening for feed of atomizer mill 2, and another road is communicated with coal slurry pump 3, and the discharge port of atomizer mill 2 is then communicated with the opening for feed of rough grinding machine 1.In the present embodiment, the method that coal water slurry preparing mechanism 100 adopts low-rank coal to prepare high-concentration coal-water slurry can be produced and obtain the high-concentration coal-water slurry that coal grain quality accounts for coal water slurry total mass more than 55%, namely the coal grain of different-grain diameter is ground respectively by rough grinding machine 1 and atomizer mill 2, form certain grating relation, thus reaching higher filling ratio, the high-concentration coal-water slurry produced finally is pressed and delivered to gasification mechanism 200 by coal slurry pump 3.It should be noted that, the above-mentioned method utilizing low-rank coal to prepare high-concentration coal-water slurry in the patent No. is: open in the patent of invention of ZL200710188396.7, therefore repeats no more.
Gasification mechanism 200 comprises a vapourizing furnace 5, and the top of vapourizing furnace 5 has the gas exit of back taper, and this gas exit connects chilling ring 21 and a hot gas pipe 9 successively.In vapourizing furnace 5, its shape is provided with a water wall 6, this water wall 6 is extended to the bottom of vapourizing furnace 5 by the top of vapourizing furnace 5, and water wall 6 bottom forms one for cinder notch 17 under the dirty taper of slag.The middle part radial direction of vapourizing furnace 5 is provided with several burners 4 running through vapourizing furnace 5 and water wall 6, and each burner 4 is all communicated with the coal slurry pump 3 of coal water slurry preparing mechanism 100.The bottom of vapourizing furnace 5 is slag bath 19, there is the chilled water of certain liquid level in slag bath 19, and the bottom of slag bath 19 is provided with dregs breaker 13 and a lock hopper 14 successively.
In a preferred embodiment, burner is that even number is symmetrical along the circumference of vapourizing furnace 5, and each burner becomes 0 ~ 60 ° of angle (as shown in Figure 2) with the vapourizing furnace diameter horizontal sextant angle β by this burner.
In a preferred embodiment, be provided with a protection chuck 16 between vapourizing furnace 5 and water wall 6, this protection chuck 16 is the ring seal mantle cavity formed between vapourizing furnace 5 inwall and water wall 6.Operationally; can not stop to add a certain amount of rare gas element in protection chuck 16; the rare gas element revealed enters vapourizing furnace 5 inside and mixes with hot coal gas, is completely cut off between water wall 6 and vapourizing furnace 5 cylindrical shell and conducts heat, thus make vapourizing furnace 5 cylindrical shell from hyperthermia radiation by rare gas element.
In a preferred embodiment, the water jacket 18 of an annular is provided with in the vapourizing furnace 5 below water wall 6, the lower end closed of water jacket 18, but open upper end.Operationally, add water coolant to protect vapourizing furnace 5 lower cylinder from hyperthermia radiation by water-in to water jacket 18, water coolant enters slag bath 19 to ensure level stability by the upper end overflow of water jacket 18 simultaneously.
In a preferred embodiment, chilling ring 21, vapourizing furnace 5, water wall 6, lower cinder notch 17, slag bath 19, dregs breaker 7 and lock hopper 8 present position are same axis, and in being arranged vertically from high to low.
In a preferred embodiment; the water wall 6 playing heat-blocking action also can adopt other schemes to replace; on the inwall of vapourizing furnace 5, such as cover the thermal insulation layer that one deck is made up of high temperature material, for blocking heat transmission, to protect vapourizing furnace 5 cylindrical shell from hyperthermia radiation.
In a preferred embodiment, chilling ring 21 sprays the waterworks of chilled water function for having, the gas exit bore of its bore and vapourizing furnace 5 is close.Operationally; chilling ring 21 can downstream direction along hot gas pipe 9 rotary-jet chilled water; object is to form certain thickness moisture film at hot gas pipe 9 internal surface, reduces gas temperature for transpiring moisture, also can play the effect of protection hot gas pipe 9 simultaneously.In addition, chilling ring 21 can be substituted by other forms of waterworks, such as, also can adopt jacket pipe, and chuck fills chilled water in chamber, the interior tube-surface of jacket pipe is evenly offered towards the aperture of air flow line, and operationally jacket pipe internal surface just forms one deck uniform water film.
In a preferred embodiment, hot gas pipe 9 is provided with several chilled water shower nozzles 20 on different heights, for postinjection chilled water, to ensure that the temperature of hot coal gas before entering waste heat recovery mechanism 300 reaches safety temperature.
In a preferred embodiment, liner thermal insulation material or water jacket protection hot gas pipe 9 can also be adopted.
Operationally, the high-concentration coal-water slurry prepared by coal water slurry preparing mechanism 100 sends into burner 4 after being pressurizeed by coal slurry pump 3 respectively, collision is rotated after being atomized by burner 4 pairs of coal water slurry of different directions in vapourizing furnace 5, and in vapourizing furnace 5, carry out anoxycausis reaction with oxygen mix, generate hot coal gas; Pass through to oxygen content control temperature of reaction on the ash fusion point of coal simultaneously, ensure grey fractional melting in coal water slurry and along water wall 6(or other thermal insulation layers) inwall flows down, and flow down from lower cinder notch 17 and fall into slag bath 19, the slag fallen in slag bath 19 is crisp with water-cooled in slag bath 19, after broken finally by dregs breaker 7, intermittent type enters lock hopper 8, and disintegrating slag is irregularly discharged together with water from lock hopper 8.
The hot coal gas generated after vapourizing furnace 5 reacts enters hot gas pipe 9 by the gas exit at vapourizing furnace 5 top by chilling ring 21, the chilled water that chilling ring 21 sprays forms certain thickness moisture film on hot gas pipe 9 inwall, hot coal gas is evaporated by moisture during hot gas pipe 9, gas temperature declines fast, and before reaching safety temperature, spray chilled water by the Quench shower nozzle 20 be arranged on hot gas pipe 9 carry out control temperature, make hot coal gas temperature before entering waste heat recovery mechanism 300 reach safety temperature.
As shown in Figure 1, waste heat recovery mechanism 300 comprises a cyclonic separator 10 and a convection current and to give up pot 11.Wherein, the side, middle part of cyclonic separator 10 is provided with the gas inlet be connected with hot gas pipe 9, and the gas inlet of cyclonic separator 10 enters with tangent line form.The top of cyclonic separator 10 is connected by the give up top of pot 11 of pipeline and convection current, and convection current is given up in pot 11 and is provided with the snakelike heat exchange tube 12 that is used for carrying out with heating gas heat exchange, and the give up lower side of pot 11 of convection current is provided with venting port.
Operationally, heating gas after chilling ring 21 and hot gas pipe 9 are lowered the temperature tangentially enters cyclonic separator 10 from the gas inlet of cyclonic separator 10, lime-ash in heating gas is owing to discharging the separated bottom from cyclonic separator 10 of centrifugal action, heating gas is then gone out by the top of cyclonic separator 10 and is entered convection current and to give up pot 11, heating gas carries out heat exchange with snakelike heat exchange tube 12 in pot 11 is given up in convection current, heat is recycled, and the coal gas after heat exchange then enters washing mechanism 400 from the give up venting port of pot 11 lower side of convection current.
In a preferred embodiment, a soot blower structure (not shown) can also be installed in pot 11 is given up in convection current, there is not dust stratification to keep snakelike heat exchange tube 12 surface.
In a preferred embodiment, the convection current in waste heat recovery mechanism 300 give up pot 11 also can according to subsequent technique (water to steam ratio of conversion section) require carry out accepting or rejecting or increasing and decreasing.
Washing mechanism 400 comprises washer 13, washing tower 14 and a washing pump 15.Wherein, the give up gas exit of pot 11 of import and the convection current of washer 13 is communicated with, and the outlet of washer 13 is communicated with washing tower 14.The top-side of washing tower 14 is provided with the water-in adding water, and top is provided with the venting port of output products gas, and bottom is provided with the water outlet of discharging waste water.The water outlet of washing tower 14 is divided into two-way, and a road is the inlet communication of outer draining, another road and washing pump 15.The outlet of washing pump 15 is also divided into two-way, and a road is communicated with washer 13, and another road is communicated with the water jacket 18 of vapourizing furnace 5 bottom.
In a preferred embodiment, can a Venturi tube (not shown) be set in washer 18, to make washing water and cooled coal gas at the abundant mixing, washing of Venturi tube, preliminary removing macrobead lime-ash.
Operationally, heating gas enters washing mechanism 400 after pot 11 heat exchange is given up in convection current, first carries out tentatively slightly washing in washer 13, in washer 13, enter washing tower 14 from the washing water of washing pump 15 and coal gas washer 13 after mixing, washing.Be separated washing tower 14 from washer 13 steam water interface out, oarse-grained dust stratification and water droplet fall into bottom washing tower 14, the tower tray of cooled coal gas from below to up through washing tower 14 after being separated, in washing tower 14 coal gas and from washing tower 14 top the water that adds carry out meticulousr washing, to remove the thin ash in cooled coal gas.The cooled coal gas of last washes clean is discharged from the venting port at washing tower 14 top and is entered lower procedure.The waste water of discharging bottom washing tower 14 has three effects: first part goes washer 13 as washing water washing heating gas through washing pump 15; second section is protected vapourizing furnace 5 lower cylinder from hyperthermia radiation respectively as water coolant and moisturizing through washing pump 15 chuck 18 that anhydrates and keeps slag bath 19 stable level, and Part III keeps washing tower 14 stable level as outer draining.
The various embodiments described above are only for illustration of the present invention, and wherein the structure, mode of connection etc. of each parts all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (8)
1. a Swirl injection type coal water slurry gasification, is characterized in that, this gasification installation comprises:
One coal water slurry preparing mechanism,
The one gasification mechanism be communicated with the grout outlet of described coal water slurry preparing mechanism,
One waste heat recovery mechanism be communicated with described air outlet of gasifying mechanism, and
One washing mechanism be communicated with the venting port of described waste heat recovery mechanism;
Wherein, described gasification mechanism comprises a vapourizing furnace, and the top of described vapourizing furnace has the gas exit of back taper, and described gas exit connects a Quench mechanism and a hot gas pipe successively; Is provided with one for blocking the diathermic wall that heat transmits according to its shape in described vapourizing furnace, described diathermic wall extends to the bottom of described vapourizing furnace by the top of described vapourizing furnace, and the bottom of described diathermic wall forms one for cinder notch under the dirty taper of slag; The middle part radial direction of described vapourizing furnace is provided with several burners running through described vapourizing furnace and diathermic wall, and burner described in each is all communicated with described coal water slurry preparing mechanism; The bottom of described vapourizing furnace is slag bath, there is the chilled water of certain liquid level in described slag bath, and the bottom of described slag bath is provided with a dregs breaker and a lock hopper successively;
Described waste heat recovery mechanism comprises cyclonic separator and convection current and to give up pot; Wherein, the side, middle part of described cyclonic separator is provided with the gas inlet be connected with described hot gas pipe, and the top of described cyclonic separator is connected by the give up top of pot of pipeline and described convection current; Described convection current is given up in pot and is provided with heat transfer tube, and the give up lower side of pot of described convection current is provided with venting port;
Described washing mechanism comprises washer, washing tower and washing pump; The give up venting port of pot of import and the described convection current of described washer is communicated with, and the outlet of described washer is communicated with described washing tower; The water outlet of described washing tower is divided into two-way, and a road is the inlet communication of outer draining, another road and described washing pump; Described washing pump outlet is communicated with described washer; Be provided with the water jacket of an annular in described vapourizing furnace below described diathermic wall, the lower end closed of described water jacket, open upper end, described water jacket also with the outlet of described washing pump; Be provided with the protection chuck that can be filled with rare gas element between described vapourizing furnace and described diathermic wall, described protection chuck is the ring seal mantle cavity formed between described gasification stove internal wall and described diathermic wall.
2. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, is characterized in that, described coal water slurry preparing mechanism comprises a rough grinding machine, an atomizer mill and a coal slurry pump; The discharge port of described rough grinding machine is divided into two-way, and a road is communicated with the opening for feed of described atomizer mill, and another road is communicated with described coal slurry pump, and the discharge port of described atomizer mill is communicated with the opening for feed of described rough grinding machine; The method that described coal water slurry preparing mechanism adopts low-rank coal to prepare high-concentration coal-water slurry produces high-concentration coal-water slurry.
3. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, it is characterized in that, described burner is that even number is symmetrical along the circumference of described vapourizing furnace, and each described burner becomes 0 ~ 60 ° of angle with the described vapourizing furnace diameter horizontal sextant angle by this burner.
4. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, is characterized in that, described vapourizing furnace, diathermic wall, lower cinder notch, slag bath, dregs breaker and lock hopper present position are same axis, and in being arranged vertically from high to low.
5. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, is characterized in that, the thermal insulation layer that described diathermic wall is water wall structure or is made up of high temperature material.
6. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, it is characterized in that, described Quench mechanism is chilling ring or jacket pipe, the bore of described chilling ring or jacket pipe and the gas exit bore of described vapourizing furnace close, described chilling ring or jacket pipe energy downstream direction are along described hot gas pipe rotary-jet chilled water.
7. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, is characterized in that, described hot gas pipe is provided with several chilled water shower nozzles on different heights.
8. a kind of Swirl injection type coal water slurry gasification as claimed in claim 1, is characterized in that, described convection current is given up in pot and is provided with a soot blower structure, is provided with a Venturi tube in described washer.
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| CN104017605A (en) * | 2014-06-24 | 2014-09-03 | 中国神华能源股份有限公司 | Coal gasification furnace and coal water slurry gasification treatment device with same |
| CN104017606B (en) * | 2014-06-24 | 2016-04-20 | 中国神华能源股份有限公司 | Coal-water slurry gasification system |
| CN104560207B (en) * | 2014-12-09 | 2017-01-18 | 煤炭科学技术研究院有限公司 | Gasification device of coal derived industrial gas |
| CN105038860A (en) * | 2015-07-10 | 2015-11-11 | 北京柯林斯达科技发展有限公司 | Swirl-flow type gasification furnace and swirl-flow type gasification process |
| CN107653007A (en) * | 2017-11-08 | 2018-02-02 | 中科合肥煤气化技术有限公司 | A kind of high temperature heating gas washes de-dusting cycle device |
| CN108105798A (en) * | 2017-12-15 | 2018-06-01 | 宁夏科豪陶瓷有限公司 | A kind of spray drying Tower System |
| CN108913208A (en) * | 2018-08-21 | 2018-11-30 | 北京迈未科技有限公司 | A kind of cold grey formula high efficient heat recovery gasification system of wet process and technique |
| US11834611B2 (en) | 2019-01-17 | 2023-12-05 | His Majesty The King In Right Of Canada, Represented By The Minister Of Natural Resources | Reactor and method for ablative centrifuge pyrolysis |
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