CN205026699U - Buggy stove wet -type slagging -off waste heat utilization system of power plant - Google Patents
Buggy stove wet -type slagging -off waste heat utilization system of power plant Download PDFInfo
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- CN205026699U CN205026699U CN201520642951.9U CN201520642951U CN205026699U CN 205026699 U CN205026699 U CN 205026699U CN 201520642951 U CN201520642951 U CN 201520642951U CN 205026699 U CN205026699 U CN 205026699U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to a buggy stove wet -type slagging -off waste heat utilization system of power plant. The device includes boiler, boiler sediment fill, clinker crusher, hydraulic jet ware, towards pulp water pump, first filter, absorption heat pump device, forced draught blower, thick liquid delivery pump, high -efficient concentrated pond, thick liquid pond, water storage delivery pump, dewatering bin, slurry pump, the tank etc. Of sinking of sinking. The utility model discloses a set up high -efficient concentrated pond, the fine slag granule that carries the heat transfer aquatic subsides and is concentrated to through dewatering and the sediment at the dewatering bin repeatedly, the jam and the deposition of heat exchanger water side pipe wall have been avoided, on the other hand, the utility model discloses a slag is used for preheating combustion air at the heat by towards the release of pulp water cooling process to finally bring the boiler into, reduced the lime -ash heat loss of boiler in other words, improved boiler efficiency.
Description
Technical field
The utility model relates to high-efficiency energy-saving technology field, particularly a kind of power plant coal-powder boiler wet slag removal residual-heat utilization method and system thereof.
Background technology
The slagging-off of coal fired boiler of power plant mainly contains two kinds of modes, and a kind of is the wet slag removal adopting waterpower cooling, and another kind adopts air cooled dry slag disposal.Dry slag disposal has that water consumption is low, the simple advantage of system, utilizes dry slag disposal mode to reclaim afterheat of slags, heat-setting water.But dry bottom ash handling system air capacity difficulty controls, and easily causes slag temperature higher, if too much cooling air quantity enters boiler from furnace bottom, can cause combustion instability, reduces boiler efficiency.
The slag temperature of wet slag removal mode controls stable, but water consumption and power consumption are comparatively large, and after the temperature lowering water absorption afterheat of slags of slag remover, this part heat generally will not reclaim, and is scattered and disappeared in the environment by the natural evaporation of part water.If application number is the patent application of CN201010202832.3 and CN201420854660.1, it makes use of the waste heat of wet slag removal system, but the water overflowed by submerged slag conveyor (temperature lowering water of slag remover) directly enters heat exchanger and carries out heat recovery, because overflow water contains slag in small, broken bits, easily cause blocking and the dust stratification of heat exchanger water side pipe wall, and because overflow water self-temperature lower (45-65 DEG C), cause the heat exchanger heat transfer temperature difference too little, heat exchange area must be caused significantly to increase, increase heat transfer medium flows resistance, reduce the whole efficiency of bootstrap system.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of reasonable in design, effectively can improves heat transfer temperature difference, reclaim afterheat of slags and heat returned boiler combustion system, improve power plant's coal-powder boiler wet slag removal bootstrap system of boiler efficiency.
A kind of power plant coal-powder boiler wet slag removal bootstrap system, comprises boiler, boiler slag bucket, slag crusher, hydraulic ejector, slag-washing-out pump, first filter, absorption heat pump unit, pressure fan, heavy slurry delivery pump, efficient concentration pond, slurry sediment pool, water storage delivery pump, drainage bin, slurry pump, tank, air preheater, electrostatic precipitator, desulfurizing tower, chimney, steam turbine, condenser, boiler is communicated with slag crusher by the slag bucket ash gate of boiler slag bucket, slag crusher, hydraulic ejector, drainage bin, efficient concentration pond, slurry sediment pool is communicated with successively, and slurry sediment pool is communicated with drainage bin by heavy slurry delivery pump, and tank is communicated with slurry sediment pool by slurry pump, be communicated with absorption heat pump unit by water storage delivery pump, tank is also communicated with efficient concentration pond, and absorption heat pump unit is successively by the first filter, slag-washing-out pump respectively with hydraulic ejector, slag crusher, boiler slag bucket be communicated with, absorption heat pump unit also respectively with pressure fan, air preheater is communicated with, boiler, air preheater, electrostatic precipitator, desulfurizing tower, chimney is communicated with successively, and boiler is communicated with steam turbine by stove internal heating surface, steam turbine also respectively with condenser, absorption heat pump unit is communicated with.
As preferably, absorption heat pump unit is communicated with boiler by air preheater.Its advantage is, combustion air carries out first order heat temperature raising in advance before entering air preheater in absorption heat pump unit, can be used for alternative Boiler Air Heater's, and improve because of the entering air temperature of air preheater, effectively can alleviate the blockage problem of air preheater; On the other hand, combustion air has carried out twice heat temperature raising, substantially increases boiler efficiency.
As preferably, between tank and water storage delivery pump, be provided with the second filter.Its advantage is, more can reduce fine slag granules enter heat exchanger by filter.
The fine slag granules of carrying in heat-exchanging water, by arranging efficient concentration pond, is carried out sedimentation and concentrates, and by carrying out dewatering and sediment at drainage bin repeatedly, avoiding blocking and the dust stratification of heat exchanger water side pipe wall by native system; On the other hand, native system adopts absorption heat pump unit, utilize the extracted steam from turbine heat of additional absorbent simultaneously, and slag is at the heat discharged by washing slag water cooling procedure, be used to warm-up combustion-supporting air, and finally bring boiler into, be equivalent to the cinder heat loss decreasing boiler, improve boiler efficiency.
The utility model compared with the existing technology has the following advantages and effect:
1, due to primary water and the not direct heat transfer of boiler auxiliary combustion air, but by absorption heat pump unit, utilize the extracted steam from turbine heat of additional absorbent, improve the average endothermic temperature of combustion air in absorption heat pump unit, increase the heat transfer temperature difference of air in warm.Directly compared by the mode of heat exchanger heat exchange with combustion air with tank filtered water, can heat exchange area be effectively reduced, reduce flow process and the flow resistance of water and combustion air.
2, because slag is at the heat discharged by washing slag water cooling procedure, be used to warm-up combustion-supporting air, and finally bring boiler into, decrease the cinder heat loss of boiler, improve boiler efficiency.
3, because combustion air carries out first order heat temperature raising in advance before entering air preheater in absorption heat pump unit, can be used for alternative Boiler Air Heater's, and improve because of the entering air temperature of air preheater, effectively can alleviate the blockage problem of air preheater.
4, owing to make use of a large amount of afterheat of slags, under the condition that air capacity is equal with air preheater entering air temperature, the steam consumption of the utility model technological process is less than adopting the steam consumption of steam air heater scheme, the economy also corresponding raising of whole power plant.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is system architecture schematic diagram of the present utility model.
Fig. 2 is method washing slag water circulation process schematic diagram of the present utility model.
Fig. 3 is the utility model steam heat-exchanging schematic flow sheet.
Fig. 4 is the workflow schematic diagram of the utility model combustion air.
Label declaration:
1, boiler 2, boiler slag bucket 3, slag bucket ash gate
4, the second filter 5, slag crusher 6, hydraulic ejector
7, slag-washing-out pump 8, first filter 9, stove internal heating surface
10, air preheater 11, electrostatic precipitator 12, desulfurizing tower
13, chimney 14, steam turbine 15, condenser
16, absorption heat pump unit 17, pressure fan 18, heavy slurry delivery pump
19, efficient concentration pond 20, slurry sediment pool 21, water storage delivery pump
22, drainage bin 23, Star-like unloader 24, slurry pump
25, tank 101, boiler feedwater from back heating system
102, condensate water 103, the combustion air of back heating system is gone to
104, water separated out by drainage bin overflow water 105, drainage bin
Detailed description of the invention
Be described in further detail the utility model below in conjunction with embodiment, following examples are that the utility model is not limited to following examples to explanation of the present utility model.
Embodiment 1:
As shown in Figure 1, a kind of power plant coal-powder boiler wet slag removal bootstrap system of the present embodiment is made up of boiler 1, boiler slag bucket 2, second filter 4, slag crusher 5, hydraulic ejector 6, slag-washing-out pump 7, first filter 8, air preheater 10, electrostatic precipitator 11, desulfurizing tower 12, chimney 13, steam turbine 14, condenser 15, absorption heat pump unit 16, pressure fan 17, heavy slurry delivery pump 18, efficient concentration pond 19, slurry sediment pool 20, water storage delivery pump 21, drainage bin 22, Star-like unloader 23, slurry pump 24, tank 25.
Boiler 1 is provided with boiler slag bucket 2, boiler slag bucket 2 lower end is provided with slag bucket ash gate 3, slag bucket ash gate 3 is communicated with slag crusher 5 side, slag crusher 5 opposite side is communicated with hydraulic ejector 6, hydraulic ejector 6 is also communicated with drainage bin 22, Star-like unloader 23 is provided with bottom drainage bin 22, drainage bin 22 is communicated with efficient concentration pond 19, efficient concentration pond 19 is also communicated with slurry sediment pool 20, slurry sediment pool 20 is also communicated with drainage bin 22 by heavy slurry delivery pump 18, slurry sediment pool 20 is also communicated with tank 25 by slurry pump 24, tank 25 is also communicated with efficient concentration pond 19, tank 25 is also successively by the second filter 4, water storage delivery pump 21 is communicated with absorption heat pump unit 16, absorption heat pump unit 16 is also successively by the first filter 8, slag-washing-out pump 7 respectively with hydraulic ejector 6, slag crusher 5, boiler slag bucket 2 is communicated with, absorption heat pump unit 16 also respectively with pressure fan 17, steam turbine 14 is communicated with, absorption heat pump unit 16 is communicated with boiler 1 by air preheater 10.
Boiler 1, air preheater 10, electrostatic precipitator 11, desulfurizing tower 12, chimney 13 are communicated with successively, and absorption heat pump unit 16 is communicated with boiler 1 by air preheater 10.Air preheater 10 can be used for preheated air, thus improves boiler efficiency; Simultaneously burning after high-temperature flue gas by heat exchange and purifications such as electrostatic precipitator 11, desulfurizing towers 12, afterwards again by chimney 13 discharged to ambient air, decrease environmental pollution.
Boiler 1 is communicated with steam turbine 14 by stove internal heating surface 9, and steam turbine 14 is also communicated with condenser 15, absorption heat pump unit 16 respectively.
As shown in Figure 1, the path of each parts of the present embodiment is provided with corresponding by-pass valve control.
The UTILIZATION OF VESIDUAL HEAT IN process of the present embodiment is as follows:
The high temperature furnace slag of boiler 1 in boiler slag bucket 2 by a part from after washing slag water (the water temperature 30 DEG C) cooling of slag-washing-out pump 7, discharged by slag bucket ash gate 3, then slag crusher 5 is entered under gravity, slag is broken for fritter slag, fritter slag enters hydraulic ejector 6 along with part washing slag water, and under hydraulic ejector 6 acts on, be transported to drainage bin 22.Be deposited on bottom drainage bin 22 after slag dehydration, then control to export through Star-like unloader 23, transported outward by slag transport vehicle.
After the overflow water 104 of drainage bin 22 and precipitation water 105 collect, flow in efficient concentration pond 19 through pipeline, the fine slag granules of carrying in water is carried out sedimentation at this and is concentrated, slag bottom efficient concentration pond 19 is starched through Cemented filling to slurry sediment pool 20, and the primary water on concentration basin 20 top and overflow water finally flow into tank 25, tank water temperature 45 DEG C.Bottom tank 25, the slag slurry of a small amount of precipitation is under slurry pump 24 acts on, and is transported to slurry sediment pool 20.Finally, the slag slurry in slurry sediment pool 20, through heavy slurry delivery pump 18, is again delivered to drainage bin 22 and carries out dewatering and sediment.
Water in tank 25, after the second filter 4 filters, under the effect of water storage delivery pump 21, enters absorption heat pump unit 16, uses as low-temperature heat source.The heat of slags that water absorbs in flushing cinder process, be released in absorption heat pump unit 16, finally, coolant-temperature gage after heat exchange is down to 30 DEG C, after the first filter 8 filters and slag-washing-out pump 7 boosts, be divided into three parts as washing slag water, enter boiler slag bucket 2, slag crusher 5 and hydraulic ejector 6 respectively.
The high temperature heat source of absorption heat pump unit 16 draws gas from a part for steam turbine 14.Boiler feedwater 101 from back heating system becomes superheated steam after the stove internal heating surface 9 of boiler 1 absorbs heat, and then enters steam turbine 14 and does work.Wherein a part of steam is extracted out through steam turbine 14 extraction opening, enters absorption heat pump unit 16, becomes the high temperature heat source maintaining it and run, steam pressure 0.4MPa, vapor (steam) temperature 250 DEG C.Condensate water is condensed into, condensing water temperature 95 DEG C after steam heat release.Another part steam, then after steam turbine 1 completes whole acting process, enters condenser 15 and is condensed into condensate water, and the condensate water in final sum absorption heat pump unit 16 collects the condensate water 102 becoming and go to back heating system together.
In absorption heat pump unit 16, be used to heating boiler combustion air 103 from tank 25 filtered water liberated heat with from steam turbine 14 liberated heat that draws gas.Boiler auxiliary combustion air 103 (temperature 5 DEG C), under pressure fan 17 acts on, is sent in absorption heat pump unit 16 and carries out first order preheating, air themperature 50 DEG C after preheating.Combustion air 103 enters boiler 1 after air preheater 10 post bake afterwards, assists coal dust firing.High-temperature flue gas after burning respectively through after the heat exchange such as stove internal heating surface 9, air preheater 10, electrostatic precipitator 11, desulfurizing tower 12 of boiler 1 and purification process, by chimney 13 discharged to ambient air.
Power plant's coal-powder boiler wet slag removal residual-heat utilization method of the present embodiment, comprises the steps:
S1. washing slag water to absorb after heat of slags as low-temperature heat source heat release in absorption heat pump unit, comprises the steps (as shown in Figure 2):
S11. washing slag water carries slag and enters slag crusher and carry out slag fragmentation, and now washing slag water temperature is 45 DEG C-65 DEG C;
S12. the slag after washing slag water carries fragmentation carries out processed in drainage bin;
S13. after dehydration, slag is exported, overflow water, separate out after water collects carry out concentrating, sedimentation;
S14. slurry sediment pool delivered to by slag slurry, and primary water enters tank;
S15. the slag slurry in slurry sediment pool is delivered to drainage bin and is again carried out processed, and as low-temperature heat source heat release in absorption heat pump unit after primary water (temperature is 45 DEG C-65 DEG C) filters, temperature is down to 30 DEG C-50 DEG C;
S16. again utilize as washing slag water after primary water heat release, be namely divided into three parts as washing slag water after primary water heat release, enter boiler slag bucket, slag crusher and hydraulic ejector respectively and utilize;
S2. steam is as high temperature heat source heat release in absorption heat pump unit, comprises the steps (as shown in Figure 3):
S21. boiler feedwater becomes steam after absorbing heat in boiler;
S22. steam enters steam turbine acting;
S221. (pressure is 0.14MPa-0.4MPa to a part of steam, temperature is 145 DEG C-250 DEG C) extract out from turbine bleed point, enter absorption heat pump unit heat release as high temperature heat source, be condensed into condensate water after steam heat release, condensing water temperature is 90 DEG C-100 DEG C;
S222. residual steam is discharged from turbine discharge mouth, enters condenser and is condensed into condensate water;
S23. the condensate water in condenser and the two bursts of condensate water of the condensate water in absorption heat pump unit are with going to back heating system heating;
S3. combustion air absorbs heat in absorption heat pump as heat sink, after enter boiler auxiliary combustion, comprise the steps (as shown in Figure 4):
S31. combustion air (temperature is 5 DEG C-30 DEG C), under pressure fan effect, is sent in absorption heat pump unit and carries out first time preheating, and temperature rises to 50 DEG C-70 DEG C;
S32. the combustion air after first time preheating carries out second time preheating in air preheater;
S33. the combustion air after twice preheating enters boiler, assists coal dust firing, becomes high-temperature flue gas;
S34. discharged to air after high-temperature flue gas heat exchange in boiler, purification.
The order of above-mentioned steps does not make considered critical, and in actual mechanical process, S1, S2, S3 are processes constantly repeated, and some step is carried out simultaneously, as S221 and S222.
Embodiment 2:
The present embodiment is similar to embodiment 1, and its difference is:
The UTILIZATION OF VESIDUAL HEAT IN process of the present embodiment is as follows:
The high temperature furnace slag of boiler 1 enters drainage bin 22 through slag bucket ash gate 3, slag crusher 5, hydraulic ejector 6 be the washing slag water cooling of 50 DEG C by a part from the temperature of slag-washing-out pump 7 in boiler slag bucket 2 after successively.Slag after dehydration is transported outward by slag transport vehicle through Star-like unloader 23.
Water in drainage bin 22 removes slag slurry after efficient concentration pond 19 processes, and primary water enters tank 25, and tank water temperature is 65 DEG C.Primary water uses as the low-temperature heat source of absorption heat pump unit 16.After primary water heat release, coolant-temperature gage is down to 50 DEG C, then recycles as washing slag water.
The high temperature heat source of absorption heat pump unit 16 draws gas from a part for steam turbine 14, and steam pressure is 0.14MPa, and vapor (steam) temperature is 145 DEG C.Be condensed into the condensate water that temperature is 90 DEG C after steam heat release, together with after then collecting with the condensate water of condenser 15, go to back heating system.
In absorption heat pump unit 16, primary water liberated heat and steam turbine 14 draw gas release partial heat be all finally used to heating boiler combustion air 103.Temperature is that the boiler auxiliary combustion air 103 of 30 DEG C carries out first time preheating in absorption heat pump unit 16, and after preheating, air themperature is 70 DEG C.Combustion air 103 enters boiler 1 after air preheater 10 post bake afterwards, assists coal dust firing.High-temperature flue gas after burning respectively through after the heat exchange such as stove internal heating surface 9, air preheater 10, electrostatic precipitator 11, desulfurizing tower 12 of boiler 1 and purification process, by chimney 13 discharged to ambient air.
In sum, primary water of the present utility model and boiler auxiliary combustion air 103 not direct heat transfer, but by absorption heat pump unit 16, the steam turbine 14 of additional absorbent is utilized to draw gas heat, improve the average endothermic temperature of combustion air 103 in absorption heat pump unit 16, increase the heat transfer temperature difference of air in warm, can be used for alternative Boiler Air Heater's simultaneously, effectively alleviate the blockage problem of air preheater.Directly compared by the mode of heat exchanger heat exchange with combustion air 103 with primary water, can heat exchange area be effectively reduced, reduce steam consumption, reduce flow process and the flow resistance of water and combustion air 103.In addition, slag, at the heat discharged by washing slag water cooling procedure, is used to warm-up combustion-supporting air 103, and finally brings boiler 1 into, decreases the cinder heat loss of boiler 1, improves boiler 1 efficiency.
In other words, the utility model effectively can not only improve heat transfer temperature difference, reduce heat exchange area, reclaims afterheat of slags and heat is returned boiler combustion system, raising boiler efficiency, and ensure that slag in small, broken bits can not enter heat exchanger, i.e. absorption heat pump unit, thus avoid blocking and the dust stratification of side pipe wall, extend service life of equipment, reduce cost.
In addition, it should be noted that, the specific embodiment described in this description, the shape, institute's title of being named etc. of its parts and components can be different.All equivalences of doing according to structure, feature and the principle described in the utility model inventional idea or simple change, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (3)
1. power plant's coal-powder boiler wet slag removal bootstrap system, is characterized in that: comprise boiler, boiler slag bucket, slag crusher, hydraulic ejector, slag-washing-out pump, first filter, absorption heat pump unit, pressure fan, heavy slurry delivery pump, efficient concentration pond, slurry sediment pool, water storage delivery pump, drainage bin, slurry pump, tank, air preheater, electrostatic precipitator, desulfurizing tower, chimney, steam turbine, condenser, described boiler is communicated with slag crusher by the slag bucket ash gate of boiler slag bucket, described slag crusher, hydraulic ejector, drainage bin, efficient concentration pond, slurry sediment pool is communicated with successively, and described slurry sediment pool is communicated with drainage bin by heavy slurry delivery pump, and described tank is communicated with slurry sediment pool by slurry pump, be communicated with absorption heat pump unit by water storage delivery pump, described tank is also communicated with efficient concentration pond, and described absorption heat pump unit is successively by the first filter, slag-washing-out pump respectively with hydraulic ejector, slag crusher, boiler slag bucket be communicated with, described absorption heat pump unit also respectively with pressure fan, air preheater is communicated with, described boiler, air preheater, electrostatic precipitator, desulfurizing tower, chimney is communicated with successively, and described boiler is communicated with steam turbine by stove internal heating surface, described steam turbine also respectively with condenser, absorption heat pump unit is communicated with.
2. a kind of power plant according to claim 1 coal-powder boiler wet slag removal bootstrap system, is characterized in that: described absorption heat pump unit is communicated with boiler by air preheater.
3. a kind of power plant according to claim 1 coal-powder boiler wet slag removal bootstrap system, is characterized in that: be provided with the second filter between described tank and water storage delivery pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520642951.9U CN205026699U (en) | 2015-08-25 | 2015-08-25 | Buggy stove wet -type slagging -off waste heat utilization system of power plant |
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| CN201520642951.9U CN205026699U (en) | 2015-08-25 | 2015-08-25 | Buggy stove wet -type slagging -off waste heat utilization system of power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166413A (en) * | 2017-06-13 | 2017-09-15 | 北京新世翼节能环保科技股份有限公司 | Waste heat recovery pulp water cooling system |
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2015
- 2015-08-25 CN CN201520642951.9U patent/CN205026699U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166413A (en) * | 2017-06-13 | 2017-09-15 | 北京新世翼节能环保科技股份有限公司 | Waste heat recovery pulp water cooling system |
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