CN203131855U - Powdery solid fuel boiler and dry method purification process system - Google Patents

Powdery solid fuel boiler and dry method purification process system Download PDF

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Publication number
CN203131855U
CN203131855U CN2013200280713U CN201320028071U CN203131855U CN 203131855 U CN203131855 U CN 203131855U CN 2013200280713 U CN2013200280713 U CN 2013200280713U CN 201320028071 U CN201320028071 U CN 201320028071U CN 203131855 U CN203131855 U CN 203131855U
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China
Prior art keywords
flue gas
solid fuel
fuel boiler
gas path
purification process
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CN2013200280713U
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Chinese (zh)
Inventor
吴道洪
吴玉林
王胜美
陈琳
鲁光明
沈大平
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Priority to CN2013200280713U priority Critical patent/CN203131855U/en
Priority to PCT/CN2013/075699 priority patent/WO2014110884A1/en
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Publication of CN203131855U publication Critical patent/CN203131855U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model discloses a powdery solid fuel boiler and a dry method purification process system. The powdery solid fuel boiler and the dry method purification process system comprise a powdery solid fuel boiler body, a heat accumulating type rotating reversing heater, a first flue gas channel, an air channel and a WCFB flue gas desulfurization device, wherein a hearth is arranged in the powdery solid fuel boiler body in a limiting mode, the inlet end of the first flue gas channel is communicated with the top of the hearth, the outlet end of the first flue gas channel is communicated with the heat accumulating type rotating reversing heater, the air channel is used for conveying air to at least the other one of accommodating parts which are arranged in pairs, and flue gas flows into the WCFB flue gas desulfurization device through a second flue gas channel after heat transfer is carried out on the flue gas by the heat accumulating type rotating reversing heater. According to the powdery solid fuel boiler and the dry method purification process system, the temperature of the high-temperature flue gas is greatly reduced, so that the efficiency of a boiler system is improved, a water injector can be eliminated, process is optimized, cost is saved, the effect of corrosion is reduced, and the problem that ash sticks walls after water is sprayed is effectively solved.

Description

Powdered solid fuel boiler and dry purification process system
Technical field
The utility model relates to technical field of heat exchange, relates in particular to a kind of powdered solid fuel boiler and dry purification process system.
Background technology
Rotary regenerative air preheater is the flue gas tail end heat-exchanger rig that generally adopts on present each high-power station's boiler.Its performance directly influences boiler thermal output.Traditional rotary regenerative air preheater generally with metal as heat transfer medium, be merely able to reclaim the heat of flue gas below 500 ℃, by warm-up combustion-supporting air, flue gas heat is taken back burner hearth, and improves combustion position, thereby improve the efficient of boiler.
Yet traditional rotary regenerative air preheater mostly is metal corrugated plate, has cold end corrosion but the metal corrugated plate rotary regenerative air preheater is in service, and because the circulation of gas is narrow, is easy to cause dust stratification and stifled ash.Rotary regenerative air preheater can be down to flue-gas temperature about 130 ℃, therefore flue gas all needs first spray cooling to handle after entering the flue gas purification system of any technology again, also can have corrosion influence to equipment, and complex process, equipment investment is big, operating cost is higher, to take up an area of and water supply requirement big.
The utility model content
The utility model is intended to solve at least one of technical problem that exists in the prior art.For this reason, a purpose of the present utility model is to propose a kind of powdered solid fuel boiler and dry purification process system, the low and elimination corrosion influence of the exhaust gas temperature of this powdered solid fuel boiler and dry purification process system.
According to powdered solid fuel boiler of the present utility model and dry purification process system, comprising: the powdered solid fuel boiler, described powdered solid fuel boiler is limited with burner hearth; Heat accumulating type rotation commutation heater, described heat accumulating type rotation commutation heater comprises: the heat exchanger main body; Drive unit, described drive unit are used for driving described heat exchanger main body around its central axis rotation; Separator, described separator is arranged in the described heat exchanger main body along the direction of described central axis, and described heat exchanger body portion is divided at least one pair of holding portion, and described every pair of holding portion becomes radially to be oppositely arranged with respect to described central axis; Heat carrier, described heat carrier are contained in respectively in the branch of described accommodation section, and described heat carrier is formed by nonmetal solid material; The first flue gas path, the arrival end of the described first flue gas path is connected with the top of described burner hearth, and the port of export is connected with described heat accumulating type rotation commutation heater, with the flue gas that will produce in the burner hearth feed in dividing of described at least paired described accommodation section and with the described heat carrier heat exchange of wherein holding; Air flue, described air flue are used for air is fed in another that described paired described accommodation section divides, so that the described heat carrier that wherein holds and described air carry out heat exchange at least; And the WCFB flue gas desulfurization device, flow into described WCFB flue gas desulfurization device through the flue gas after the heat exchange of described heat accumulating type rotation commutation heater by the second flue gas path.
According to powdered solid fuel boiler of the present utility model and dry purification process system, by heat accumulating type rotation commutation heater and WCFB flue gas desulfurization device are set, heat accumulating type rotation commutation heater can reduce the temperature of high-temperature flue gas greatly, thereby improved the efficient of steam generator system, handle in the WCFB flue gas desulfurization device in follow-up gas cleaning simultaneously and can save water injector, not only optimize technology, saved cost but also reduced the corrosion influence, also efficiently solved problems such as ash content behind the water spray is adherent simultaneously.
In addition, also can have following additional technical feature according to powdered solid fuel boiler of the present utility model and dry purification process system:
According to an embodiment of the present utility model, described coal dust is by at least a formation the in anthracite, the meager coal.
Alternatively, the described arrival end from the described first flue gas path is disposed with pendant superheater, bag wall superheater and superheater towards the described port of export of the described first flue gas path.Thus, by superheater is set, can effectively improve the thermal efficiency of cycle of whole Steam Power Equipment.
Further, in the described first flue gas path near the described port of export of the described first flue gas path, be provided with economizer.Thus, by economizer is set, can effectively absorb the heat of flue gas, reduce exhaust gas temperature, reduce flue gas loss, thus fuel saving.
According to an embodiment of the present utility model, can regulate from the velocity of flue gas that the described first flue gas path enters in the described heat accumulating type rotation commutation heater.Thus, improved the temperature for the treatment of preheated air effectively.
Alternatively, described heat carrier is SiC or pottery, and has coccoid, sheet or cavernous structure.Thus, heat accumulating type rotation commutation heater can high temperature resistant, erosion and wear resistant damage.
Alternatively, the temperature through the flue gas after the heat exchange of described heat accumulating type rotation commutation heater is 65-75 ℃.Be reduced in 65 ~ 75 ℃ at exhaust gas temperature, need produce major transformation to the sulfur removal technology of afterbody.Namely adopt the WCFB dry desulfurizing process, thereby make afterbody not need spray cooling, avoid etching problem, it just in time is the import cigarette temperature of WCFB dry desulfurizing process that flue gas is lowered to 65 ~ 75 ℃, the exhaust gas temperature more than 120 ℃ originally must spray cooling to 65 ~ 75 ℃, saved the technology of spraying water together like this, simultaneously energy-conservation, avoided the adherent unfavorable problem of water spray back ash.Thus, part gasification latent heat in the recyclable flue gas, thus having improved the thermal efficiency of boiler, the flue gas that enters follow-up WCFB flue gas desulfurization device simultaneously need not spray cooling.
According to an embodiment of the present utility model, described air is oxygen-enriched air, and is heated to 300-650 ℃ after the heat exchange of the described heat accumulating type rotation of described air process commutation heater.Thus, the air-lift unit temperature is higher.
According to an embodiment of the present utility model, described heat accumulating type rotation commutation heater further comprises: condensed fluid removes device, and described condensed fluid removes the below that device is arranged on described heat exchanger main body, to remove the condensed fluid that produces in the heat transfer process.
According to an embodiment of the present utility model, described WCFB flue gas desulfurization device comprises: the absorption tower, and the described second flue gas path is connected with the bottom on described absorption tower; The calcium hydroxide storehouse, described calcium hydroxide storehouse is arranged on the top on described absorption tower, is used for calcium hydroxide is sprayed into described absorption tower; Deduster, described deduster is connected with described absorption tower, is used for carrying out dedusting through the flue gas behind the calcium hydroxide absorption reaction; And chimney, being communicated to described chimney through the flue gas after the described deduster dedusting by the 3rd flue gas path, described the 3rd flue gas path is provided with air-introduced machine, so that described flue gas is caused described chimney.Thus, by absorption tower and calcium hydroxide storehouse are set, the calcium hydroxide that flue gas can spray into the calcium hydroxide storehouse in the absorption tower carries out absorption reaction, and by deduster is set, the flue gas after the desulfurization can enter in the deduster and purify, finally by entering atmosphere by chimney.
Further, described WCFB flue gas desulfurization device further comprises: recirculation pipe, described recirculation pipe are obliquely installed and are used for the calcium hydroxide of described deduster bottom is recycled in the described absorption tower.Thus, by repeatedly circulation, improved the utilization ratio of calcium hydroxide effectively, thereby improved desulfuration efficiency.
Further, further comprise: the 4th flue gas path, described the 4th flue gas path is recycled to the part of smoke in described the 3rd flue gas path in the described second flue gas path.Thus, further improved the purifying rate of flue gas.
Additional aspect of the present utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is according to the powdered solid fuel boiler of an embodiment of the utility model and the schematic diagram of dry purification process system.
The specific embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, close the orientation of indications such as term " " center ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " or position is based on orientation shown in the drawings or position relation; only be the utility model and simplify and describe for convenience of description; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In description of the present utility model, need to prove that unless clear and definite regulation and restriction are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete implication of above-mentioned term in the utility model.
Below with reference to powdered solid fuel boiler and the dry purification process system 100 of Fig. 1 description according to the utility model embodiment.
As shown in Figure 1, powdered solid fuel boiler and the dry purification process system 100 according to the utility model embodiment comprises: powdered solid fuel boiler 1, heat accumulating type rotation commutation heater 2, the first flue gas path 3, air flue 4 and WCFB flue gas desulfurization device 5.
Heat accumulating type rotation commutation heater 2 is used for high-temperature flue gas and treats that preheated air carries out heat exchange, thereby makes the temperature for the treatment of preheated air be elevated to certain certain value.Heat accumulating type rotation commutation heater 2 comprises: heat exchanger main body 21, drive unit, separator 22 and heat carrier.Wherein, drive unit is used for driving heat exchanger main body 21 around its central axis rotation.Separator 22 is arranged in the heat exchanger main body 21 along the direction of central axis, and heat exchanger main body 21 is separated at least one pair of holding portion, and every pair of holding portion becomes radially to be oppositely arranged with respect to central axis.Heat carrier is contained in respectively in the holding portion, and heat carrier is formed by nonmetal solid material.
In one of them example of the present utility model, heat exchanger main body 21 can form the cylinder of hollow, separator 22 can roughly be plate shape, this compartment extends along the direction of heat exchanger main body 21 cener lines, thereby heat exchanger main body 21 is separated into a pair of holding portion, heat carrier is located at respectively in two holding portions, heat carrier can be made by nonmetal solid material, flue gas and treat that preheated air feeds respectively in two holding portions, drive 21 rotations of heat exchanger main body by drive unit then, flue gas and carry out heat exchange with heat carrier in the holding portion at its place, treat preheated air and carry out heat exchange with heat carrier in the holding portion at its place, thereby make and treat that preheated air temperature raises.
Certainly, the utility model is not limited thereto, and in other examples of the present utility model, separator 22 also can be separated into heat exchanger main body 21 two pairs, three pairs even many to holding portion.
In existing gas converting heat system, flue gas is being can not be reduced to below 130 ℃ by the outlet temperature after this gas heat exchanger, because this can cause sulfuric acid to be separated out, thereby causes heavy corrosion to the parts of being made by metal in this gas heat exchanger.But, in above-mentioned heat accumulating type rotation commutation heater 2 of the present utility model (at the high-temperature flue gas of for example sulfur-bearing), because heat carrier is by for example SiC, the nonmetal solid material of pottery etc. forms, thereby the sulphur of need not worrying is 130 ℃ of corrosion problems that exist dew point to cause, and can be reduced to temperature under the dew point of sulphur to the outlet temperature of high-temperature flue gas, thereby farthest carry out heat exchange, according to an embodiment of the present utility model, described high-temperature flue gas leaves the outlet temperature of described gas heat exchanger less than 130 ℃, further, described high-temperature flue gas leaves the outlet temperature of described gas heat exchanger less than 70 ℃.This temperature is in the cards hardly in traditional gas converting heat system.In addition, outlet temperature is being reduced under the temperature of dew point, the water vapour condensation is separated out and is liquid water, has discharged a large amount of latent heat (absorb when water becomes heat that 100 ℃ water vapour absorbs and is equivalent to water and is increased to 100 ℃ from 0 ℃ from 100 ℃ heat 3 times).Because heat carrier is formed by nonmetal solid material, so after sulphur deposits to a certain degree, namely can continue use to the heat carrier cleaning of holding in this holding portion, thereby reduce the problem of the cost increase that existing parts replacement causes in traditional gas converting heat system.In addition, use the generally acknowledged computational methods in this field to calculate according to the utility model people, in addition, calculating according to the utility model people, by carrying heat storage rotation commutation heater, cold wind is heated to hot blast when being beneficial to burning, exhaust gas temperature is dropped to 65 ~ 75 ℃, effectively utilized the waste heat of fuel, and improved the efficient of boiler more than 3 percentage points.。In addition, enlarge the scope of application of coal, namely can reduce the grade of employed coal, reduced production cost further.
Wherein, powdered solid fuel boiler 1 is limited with burner hearth 11.The arrival end of the first flue gas path 3 is connected with the top of burner hearth 11, and the port of export is connected with heat accumulating type rotation commutation heater 2, feed with the flue gases that will burner hearth produce in 11 in the holding portion of paired at least heat accumulating types rotation commutation heater 2, and with holding portion in the heat carrier heat exchange held.Air flue 4 is used for air is fed in another of paired holding portion at least, so that the heat carrier that holds in the holding portion and air carry out heat exchange, passes through the inside that air after the heat exchange is supplied to burner hearth 11.Flow into WCFB flue gas desulfurization device 5 through the flue gas after 2 heat exchange of heat accumulating type rotation commutation heater by the second flue gas path 101.
In the following description, rotate counterclockwise with heat exchanger main body 21, and flue gas treats that preheated air describes for example along the left side feeding heat exchanger main body 21 of central axis in the right side feeding heat exchanger main body 21 of central axis.
As shown in Figure 1, limit burner hearth 11 in the powdered solid fuel boiler 1 to be used for holding coal dust, one end of exhaust gases passes 3 communicates with burner hearth 11, its other end communicates with heat accumulating type rotation commutation heater 2, feed with the flue gases that will burner hearth produce in 11 in first holding portion 211 of heat accumulating types rotation commutation heaters 2 (for example be the heat accumulating type rotation shown in Fig. 1 commutate the right side of heater 2), (for example rotating the left side of the heater 2 that commutates for the heat accumulating type shown in Fig. 1) in second holding portion 212 of heat accumulating type rotation commutation heater 2 is used for feeding and treats preheated air, when heat exchanger main body 21 is in not rotation status, heat carrier heat exchange in flue gas and first holding portion 211 is so that the temperature rising of heat carrier, after heat carrier absorbs heat, heat exchanger main body 21 is rotated counterclockwise, first holding portion 211 rotates to the left side of central axis, second holding portion 212 rotates to the right side of central axis, rotate to heat carrier in first holding portion 211 in left side and carry out heat exchange with air to be heated so that be with and add the hot air temperature liter, simultaneously, flue gas heats the heat carrier in second holding portion 212 that rotates to the right side.
Heat exchanger main body 21 continues to rotate counterclockwise, this moment, first holding portion 211 was rotated the right side of getting back to central axis, second holding portion 212 is rotated the left side of getting back to central axis, second holding portion, 212 interior heat carrier and the air to be heated that rotate back to the left side carry out heat exchange, flue gas heats the heat carrier in first holding portion 211 that rotates back to the right side, so circulation repeats, to finish the heating for the treatment of preheated air.
In one of them example of the present utility model, treat to feed in the burner hearth 11 from the bottom of powdered solid fuel boiler 1 after preheated air is heated to uniform temperature, thereby in burner hearth 11, carry out the high-temperature oxydation burning with coal dust.
Alternatively, coal dust is by at least a formation the in anthracite, the meager coal.
Enter WCFB flue gas desulfurization device 5 to purify with treating the flue gas that preheated air carries out after the heat exchange by the second flue gas path 101.
Powdered solid fuel boiler and dry purification process system 100 according to the utility model embodiment, by heat accumulating type rotation commutation heater 2 and WCFB flue gas desulfurization device 5 are set, heat accumulating type rotation commutation heater 2 can reduce the temperature of high-temperature flue gas greatly, thereby improved the efficient of steam generator system, handle in the WCFB flue gas desulfurization device 5 in follow-up gas cleaning simultaneously and can save water injector, not only optimize technology, saved cost but also reduced the corrosion influence, also efficiently solved problems such as ash content behind the water spray is adherent simultaneously.
Alternatively, the arrival end from the first flue gas path 3 is disposed with pendant superheater 6, bag wall superheater 7 and superheater towards the port of export of the first flue gas path 3.For example in the example of Fig. 1, pendant superheater 6 and bag wall superheater 7 are close to the arrival end setting of the first flue gas paths 3, and the space is arranged on left and right directions, the port of export setting of the contiguous first flue gas path 3 of superheater.Thus, by superheater is set, can effectively improve the thermal efficiency of cycle of whole Steam Power Equipment.
Further, in the first flue gas path 3 near the port of export of the first flue gas path 3, be provided with economizer 9.For example in the example of Fig. 1, economizer 9 is located at the below of superheater, and with superheater spaced apart certain distance on above-below direction.Thus, by economizer 9 is set, can effectively absorb the heat of flue gas, reduce exhaust gas temperature, reduce flue gas loss, thus fuel saving.
In an embodiment of the present utility model, can regulate from the velocity of flue gas that the first flue gas path 3 enters in the heat accumulating type rotation commutation heater 2.Thus, improved the temperature for the treatment of preheated air effectively.
Alternatively, heat carrier is SiC or pottery, and has coccoid, sheet or cavernous structure.Thus, heat accumulating type rotation commutation heater 2 can high temperature resistant, erosion and wear resistant damage.
Alternatively, the temperature through the flue gas after 2 heat exchange of heat accumulating type rotation commutation heater is 65-75 ℃.Must spray cooling to 65 ~ 75 ℃ at exhaust gas temperature, saved the technology of spraying water together like this, simultaneously energy-conservation, avoided the adherent unfavorable problem of water spray back ash.Thus, part gasification latent heat in the recyclable flue gas, thus having improved the thermal efficiency of boiler, the flue gas that enters follow-up WCFB flue gas desulfurization device 5 simultaneously need not spray cooling.
Alternatively, air is oxygen-enriched air, and is heated to 300-650 ℃ after 2 heat exchange of air process heat accumulating type rotation commutation heater.Thus, the air-lift unit temperature is higher.
In an embodiment of the present utility model, heat accumulating type rotation commutation heater 2 further comprises: condensed fluid removes device, and condensed fluid removes the below that device is arranged on the heat exchanger main body, to remove the condensed fluid that produces in the heat transfer process.
In an embodiment of the present utility model, WCFB flue gas desulfurization device 5 comprises: absorption tower 51, calcium hydroxide storehouse 52, deduster 53 and chimney 55.Wherein, the second flue gas path 101 is connected with the bottom on absorption tower 51.Calcium hydroxide storehouse 52 is arranged on the top on absorption tower 51, is used for calcium hydroxide is sprayed into absorption tower 51.Deduster 53 is connected with absorption tower 51, is used for carrying out dedusting through the flue gas behind the calcium hydroxide absorption reaction.Be communicated to chimney 55, the three flue gas paths 102 through the flue gas after deduster 53 dedustings by the 3rd flue gas path 102 and be provided with air-introduced machine 1021, flue gas is caused chimney 55.Thus, by absorption tower 51 and calcium hydroxide storehouse 52 are set, the calcium hydroxide that flue gas can spray into calcium hydroxide storehouse 52 in absorption tower 51 carries out absorption reaction, by deduster 53 is set, flue gas after the desulfurization can enter in the deduster 53 and purify, finally by entering atmosphere by chimney 55.
In the example of Fig. 1, one end of the second flue gas path 101 communicates with heat accumulating type rotation commutation heater 2, its other end communicates with the bottom on absorption tower 51, thereby the flue gas that temperature in the heat accumulating type rotation commutation heater 2 is reduced feeds in the absorption tower 51, flue gas rises to the top on absorption tower 51 and calcium hydroxide that calcium hydroxide storehouse 52 sprays into carries out absorption reaction, enter deduster 53 dedustings then, purification flue gas after the desulfurization leaves deduster 53 and enters the 3rd flue gas path 102, the 3rd flue gas path 102 is provided with air-introduced machine, and last flue gas enters atmosphere by chimney 55 under the effect of air-introduced machine 1021.
Further, WCFB flue gas desulfurization device 5 further comprises: recirculation pipe 54, recirculation pipe 54 are obliquely installed and are used for the calcium hydroxide of deduster 53 bottoms is recycled in the absorption tower 51.As shown in Figure 1, an end of recirculation pipe 54 communicates with the bottom of deduster 53, and its other end communicates with absorption tower 51, and the hydrated lime particle that contains that turns back to absorption tower 51 from recirculation pipe 54 reacts with the low-temperature flue gas that enters absorption tower 51 again.Thus, by repeatedly circulation, improved the utilization ratio of calcium hydroxide effectively, thereby improved desulfuration efficiency.
In one of them example of the present utility model, the bottom of recirculation pipe 54 also can be provided with at least one fluidisation blower fan 541 to play the effect of smooth returning charge.The spaced apart setting on left and right directions of 541, two fluidisation blower fans 541 of two fluidisation blower fans has been shown in the example of Fig. 1.Be understandable that the quantity of fluidisation blower fan 541 can require to arrange according to reality, to satisfy actual requirement better.
Further, further comprise: the 4th flue gas path 103, the four flue gas paths 103 are recycled to the part of smoke in the 3rd flue gas path 102 in the second flue gas path 101.For example in the example of Fig. 1, an end of the 4th flue gas path 103 communicates with the 3rd flue gas path 102 and an end of the 4th flue gas path 103 communicates with air-introduced machine the 3rd flue gas path 102 afterwards, and its other end communicates with the second flue gas path 101.Thus, further improved the purifying rate of flue gas.
To sum up, carried heat accumulating type rotation commutation heater according to powdered solid fuel boiler of the present utility model and dry purification process system 100.According to utility model people's calculating, by carrying heat storage rotation commutation heater, cold wind is heated to hot blast when being beneficial to burning, exhaust gas temperature is dropped to 65 ~ 75 ℃, effectively utilized the waste heat of fuel, and improved the efficient of boiler more than 3 percentage points.In addition, owing to be reduced in 65 ~ 75 ℃ at exhaust gas temperature, need produce major transformation to the sulfur removal technology of afterbody.Namely adopt the WCFB dry desulfurizing process, thereby make afterbody not need spray cooling, avoid etching problem, saved the technology of spraying water together simultaneously, play energy-conservation effect, avoided the adherent unfavorable problem of water spray back ash.
In the description of this specification, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present utility model or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment under the situation that does not break away from principle of the present utility model and aim, scope of the present utility model is limited by claim and equivalent thereof.

Claims (12)

1. a powdered solid fuel boiler and dry purification process system is characterized in that, comprising:
The powdered solid fuel boiler, described powdered solid fuel boiler is limited with burner hearth;
Heat accumulating type rotation commutation heater, described heat accumulating type rotation commutation heater comprises:
The heat exchanger main body;
Drive unit, described drive unit are used for driving described heat exchanger main body around its central axis rotation;
Separator, described separator is arranged in the described heat exchanger main body along the direction of described central axis, and described heat exchanger body portion is divided at least one pair of holding portion, and described every pair of holding portion becomes radially to be oppositely arranged with respect to described central axis;
Heat carrier, described heat carrier are contained in respectively in the branch of described accommodation section, and described heat carrier is formed by nonmetal solid material;
The first flue gas path, the arrival end of the described first flue gas path is connected with the top of described burner hearth, and the port of export is connected with described heat accumulating type rotation commutation heater, with the flue gas that will produce in the burner hearth feed in dividing of described at least paired described accommodation section and with the described heat carrier heat exchange of wherein holding;
Air flue, described air flue are used for air is fed in another that described paired described accommodation section divides, so that the described heat carrier that wherein holds and described air carry out heat exchange at least; And
The WCFB flue gas desulfurization device flows into described WCFB flue gas desulfurization device through the flue gas after the heat exchange of described heat accumulating type rotation commutation heater by the second flue gas path.
2. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, described powdered solid fuel is by at least a formation the in anthracite, the meager coal.
3. powdered solid fuel boiler according to claim 1 and dry purification process system, it is characterized in that, be disposed with pendant superheater, bag wall superheater and superheater from the described arrival end of the described first flue gas path towards the described port of export of the described first flue gas path.
4. powdered solid fuel boiler plant according to claim 3 is characterized in that, is provided with economizer in the described first flue gas path near the described port of export of the described first flue gas path.
5. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, can regulate from the velocity of flue gas that the described first flue gas path enters in the described heat accumulating type rotation commutation heater.
6. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, described heat carrier is SiC or pottery.
7. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, the temperature of the flue gas after the heat exchange of the described heat accumulating type rotation of process commutation heater is 65-75 ℃.
8. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, described air is oxygen-enriched air, and are heated to 300-650 ℃ after the heat exchange of the described heat accumulating type rotation of described air process commutation heater.
9. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, described heat accumulating type rotation commutation heater further comprises:
Condensed fluid removes device, and described condensed fluid removes the below that device is arranged on described heat exchanger main body, to remove the condensed fluid that produces in the heat transfer process.
10. powdered solid fuel boiler according to claim 1 and dry purification process system is characterized in that, described WCFB flue gas desulfurization device comprises:
The absorption tower, the described second flue gas path is connected with the bottom on described absorption tower;
The calcium hydroxide storehouse, described calcium hydroxide storehouse is arranged on the top on described absorption tower, is used for calcium hydroxide is sprayed into described absorption tower;
Deduster, described deduster is connected with described absorption tower, is used for carrying out dedusting through the flue gas behind the calcium hydroxide absorption reaction; And
Chimney is communicated to described chimney through the flue gas after the described deduster dedusting by the 3rd flue gas path, and described the 3rd flue gas path is provided with air-introduced machine, so that described flue gas is caused described chimney.
11. powdered solid fuel boiler according to claim 10 and dry purification process system is characterized in that, described WCFB flue gas desulfurization device further comprises:
Recirculation pipe, described recirculation pipe are obliquely installed and are used for the calcium hydroxide of described deduster bottom is recycled in the described absorption tower.
12. powdered solid fuel boiler according to claim 11 and dry purification process system is characterized in that, further comprise:
The 4th flue gas path, described the 4th flue gas path is recycled to the part of smoke in described the 3rd flue gas path in the described second flue gas path.
CN2013200280713U 2013-01-18 2013-01-18 Powdery solid fuel boiler and dry method purification process system Withdrawn - After Issue CN203131855U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103672942A (en) * 2013-01-18 2014-03-26 北京神雾环境能源科技集团股份有限公司 Powdery solid fuel boiler and dry method purification process system
CN103851632A (en) * 2014-03-12 2014-06-11 郑州经纬科技实业有限公司 Recycling system for waste cathode block from electrolytic aluminum and recycling method
CN104696979A (en) * 2013-11-27 2015-06-10 阿尔斯通技术有限公司 Dry scrubber system with air preheater protection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103672942A (en) * 2013-01-18 2014-03-26 北京神雾环境能源科技集团股份有限公司 Powdery solid fuel boiler and dry method purification process system
CN104696979A (en) * 2013-11-27 2015-06-10 阿尔斯通技术有限公司 Dry scrubber system with air preheater protection
CN104696979B (en) * 2013-11-27 2019-06-14 通用电器技术有限公司 Dry scrubber system with air preheater protection
CN103851632A (en) * 2014-03-12 2014-06-11 郑州经纬科技实业有限公司 Recycling system for waste cathode block from electrolytic aluminum and recycling method

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