CN105709575A - Industrial boiler flue gas purifying and recycling system and industrial boiler system - Google Patents
Industrial boiler flue gas purifying and recycling system and industrial boiler system Download PDFInfo
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- CN105709575A CN105709575A CN201610235292.6A CN201610235292A CN105709575A CN 105709575 A CN105709575 A CN 105709575A CN 201610235292 A CN201610235292 A CN 201610235292A CN 105709575 A CN105709575 A CN 105709575A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses an industrial boiler flue gas purifying and recycling system and an industrial boiler system.The purifying and recycling system comprises a pre-dust-removal unit, a heat exchanger and a flue gas purifying unit.The heat exchanger is communicated with a flue gas outlet of the pre-dust-removal unit, the flue gas purifying unit is communicated with the flue gas outlet of the heat exchanger and is used for nitrogen, sulfur and dust removal, and the flue gas purifying unit is further communicated with a chemical fertilizer co-production unit for producing chemical fertilizer.Firstly, flue gas is subjected to preliminary dust removal through the pre-dust-removal unit, the treatment amount of sludge wastewater in the following process is reduced, and investment cost and operation cost are reduced; then, the flue gas flows through the heat exchanger, the waste heat of the flue gas is absorbed to be used, the efficiency of the system is improved, and energy consumption is reduced; finally, the flue gas achieves nitrogen and sulfur removal through the flue gas purifying unit and is subjected to dust removal again, and the chemical fertilizer is produced through the chemical fertilizer co-production unit.The flue gas purifying and recycling system can efficiently remove smoke dust, nitrogen oxide and sulfur oxide in the flue gas, it is guaranteed that the flue gas is cleanly emitted, and waste can be recycled.
Description
Technical field
The present invention relates to Industrial Boiler Technology field, in particular it relates to a kind of Industrial Boiler gas cleaning recovery system and the industrial boiler system including this Industrial Boiler gas cleaning recovery system.
Background technology
It it is the development trend of industrial boiler system because maximizing, the unit interval coal consumption causing industrial boiler system is continuously increased, when taking to transport for long-distance, the supply of coal dust encounters difficulties, influential system stable operation, existing industrial boiler system is not arranged raw coal coal yard and pulverized coal preparation system, rely on long-distance transport, affect coal dust quality.
The flue gas discharged from the exhanst gas outlet of boiler contains the ash of more than 90% coal, and dust content in flue gas is big, as without pretreatment, then strengthened water consumption, power consumption, chemical feeding quantity, mud handling capacity in subsequent technique, strengthen investment and operating cost.
Not for the processing scheme of nitrogen oxides in existing smoke eliminator, nitrogen oxides arbitrarily discharges, and environmental effect is serious, does not meet country's pertinent regulations to the discharge standard of nitrogen oxides.And refuse after gas cleaning is processed utilization by smoke eliminator.
Summary of the invention
It is an object of the present invention to provide a kind of Industrial Boiler gas cleaning recovery system, this gas cleaning recovery system ensure that flue gas cleaning discharge, and can to waste reclaimation.
It is a further object to provide a kind of industrial boiler system, this industrial boiler system includes Industrial Boiler gas cleaning recovery system provided by the invention.
To achieve these goals, the present invention provides a kind of Industrial Boiler gas cleaning recovery system, wherein, including the pre-dust removing units for being connected with the exhanst gas outlet of boiler, the heat exchanger being connected with the exhanst gas outlet of described pre-dust removing units, the gas cleaning unit for denitrification and desulfurization dedusting being connected with the exhanst gas outlet of described heat exchanger, also being communicated with the chemical fertilizer cogeneration unit for producing chemical fertilizer on this gas cleaning unit, the exhanst gas outlet of this gas cleaning unit is for being connected with the chimney of described boiler.
Alternatively, described gas cleaning unit includes tower body, it is arranged on the ammonia spray structure in described tower body and oxidation promoter spray structure, the oxidation promoter feeding mechanism being connected with described oxidation promoter spray structure, the ammonia feeding mechanism being connected with described ammonia spray structure, described ammonia spray structure is positioned at the top of described oxidation promoter spray structure, and described oxidation promoter spray structure is positioned at the top of gas approach of described gas cleaning unit, so that the oxidation promoter generation oxidation reaction that first flue gas entered in described gas cleaning unit sprays with described oxidation promoter spray structure, occur to neutralize reaction with the ammonia of described ammonia spray structure ejection subsequently, and be expelled in described chimney by the exhanst gas outlet of described gas cleaning unit.
Alternatively, the honeycomb texture for accelerating described oxidation reaction it is additionally provided with in described gas cleaning unit, being provided with the catalyst of oxidation reaction described in catalysis on described honeycomb texture, this honeycomb texture is between the gas approach and described ammonia spray structure of described gas cleaning unit.
Alternatively, described ammonia feeding mechanism includes industrial boiler water-supply device and ammonia water generating device, the outlet conduit of this industrial boiler water-supply device includes separated first pipeline and second pipe, described first pipeline is for being transported in described ammonia water generating device by industrial boiler water-supply, to form ammonia spirit, described second pipe is for converging mutually with the liquid outlet of described ammonia water generating device, and is sprayed extremely in described tower body with spray pattern by described ammonia spray structure by the liquid after converging by water pump.
Alternatively, the bottom of described tower body is formed as the taper sedimentation tank that opening reduces from top to bottom, the bottom of described taper sedimentation tank is communicated with blowdown unit, and described taper sedimentation tank is connected with described industrial boiler water-supply device also by the 3rd pipeline, connecting with described chemical fertilizer cogeneration unit above through the 4th pipeline of described taper sedimentation tank.
Alternatively, it is provided with, in described tower body, the demister being positioned at described ammonia spray superstructure.
According to a further aspect in the invention, a kind of industrial boiler system is provided, this industrial boiler system includes pulverized-coal fired boiler and the flue gas recovery device of the exhanst gas outlet connected at described pulverized-coal fired boiler, and wherein, described flue gas recovery device is Industrial Boiler gas cleaning recovery system provided by the invention.
Alternatively, coal storage unit that described steam generator system also includes sequentially connecting from upstream to downstream, powder process unit, coal powder storage and supply unit, the meal outlet of described coal powder storage and supply unit is communicated on described pulverized-coal fired boiler by burner.
Alternatively, described powder process unit includes the run coal bin for receiving and store the raw coal by the conveying of described coal storage unit, for receiving and carry the batcher of raw coal from the discharging opening of described run coal bin, the coal pulverizer being connected with the discharge end of described batcher, the drying blower fan being connected with described coal pulverizer, the first powder collector being connected with the meal outlet of described coal pulverizer, the second powder collector being connected with the gas outlet of described first powder collector, and the Pulverized Coal Bin that the receipts powder mouth of the device that is pollinated with described first powder collector and described second is connected, and described first powder collector receive the powder precision receipts powder precision less than described second powder collector, the meal outlet of described Pulverized Coal Bin is connected with described coal powder storage and supply unit.
Alternatively, described industrial boiler system also includes the control system for controlling described powder process unit, coal powder storage and supply unit, burner, pulverized-coal fired boiler and Industrial Boiler gas cleaning recovery system.
By technique scheme, pre-dust removing units first can be passed through, for instance, pre-dust removing units can adopt cyclone separator or multi-tube dust cleaner, flue gas is carried out rough dusting, it is possible to reduce the water yield, electricity, chemical feeding quantity, mud and sewage treating capacity in subsequent technique, reduce investment and operating cost；Subsequently, the flue gas after first time dedusting flows through heat exchanger, cigarette temperature can not only be reduced to the temperature range that gas cleaning unit adapts, and the waste heat that can absorb flue gas utilizes, and improves system effectiveness, reduces energy consumption；Finally, flue gas after heat exchange realizes denitrification and desulfurization through gas cleaning unit, and carry out dedusting further, such as, gas cleaning unit can pass through to aoxidize to neutralize reaction, first being nitrogen dioxide by the oxidation of nitric oxide in flue gas, then the deleterious acidic gas reaction such as ammonia and the nitrogen dioxide in flue gas, sulfur dioxide, sulfur trioxide generates ammonium salt, and by chemical fertilizer cogeneration unit, ammonium salt is easily separated proposition and is converted into recycling chemical fertilizer.Thus, the flue dust in flue gas, nitrogen oxides, Sulfur oxide high-efficiency can not only be removed by this gas cleaning recovery system with saving energy and reduce the cost, it is ensured that flue gas cleaning discharge, moreover it is possible to refuse is recycled.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below.In the accompanying drawings:
Fig. 1 is the structural representation of the industrial boiler system that the preferred embodiment for the present invention provides；
Description of reference numerals
10 pre-dust removing units 100 air compression system 11 gas-solid separators
12 first storehouse pump 13 ash storehouses
20 heat exchanger 21 air-introduced machines
30 gas cleaning unit 31 chemical fertilizer cogeneration unit 32 tower bodies
320 taper sedimentation tank 321 blowdown unit 3210 are removed contamination grab bucket
3211 precipitations filter pollution discharge pond 3212 cesspool 322 the 3rd pipeline
323 the 4th pipeline 324 the 5th pipeline 325 the 6th pipelines
33 ammonia spray structure 34 oxidation promoter spray structure 35 oxidation promoter feeding mechanisms
36 ammonia feeding mechanism 360 industrial boiler water-supply device 361 ammonia water generating devices
362 first pipeline 363 second pipes
37 honeycomb texture 38 demisters
39-1 delivery pump 39-2,39-3,39-4,39-5,39-6,39-7 water pump
40 chimney 50 pulverized-coal fired boiler 51 slag storehouses
60 coal storage unit
61 push away coal car 62 ground reception bunker 63 dump
64 tramp iron separator 65 belt feeder 66 oscillating feeders
70 powder process unit 71 run coal bin 72 batchers
73 coal pulverizers 74 dry blower fan 75 first powder collector
76 second powder collector 77 Pulverized Coal Bin 78 second storehouse pumps
The 80 defeated powder blower fans of coal powder storage and supply unit 81
90 burner 91 aerators
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
In the present invention, when not making contrary explanation, the noun of locality used is usually for the flow direction of material such as " upstream, downstream ", specifically, being downstream towards the flow direction of material, the flow direction deviating from material is upstream, additionally, in FIG, the direction of arrow indication represents the flow direction of material.
As shown in Figure 1, the present invention provides a kind of Industrial Boiler gas cleaning recovery system, wherein, including the pre-dust removing units 10 for being connected with the exhanst gas outlet of boiler, the heat exchanger 20 being connected with the exhanst gas outlet of pre-dust removing units 10, the gas cleaning unit 30 for denitrification and desulfurization dedusting being connected with the exhanst gas outlet of heat exchanger 20, also being communicated with the chemical fertilizer cogeneration unit 31 for producing chemical fertilizer on this gas cleaning unit 30, the exhanst gas outlet of this gas cleaning unit 30 is for being connected with the chimney 40 of boiler.
Wherein, any treatment facilities that can flue gas be carried out denitrification and desulfurization dedusting simultaneously that gas cleaning unit 30 can be well known to those skilled in the art, the invention is not limited in this regard, belong among protection scope of the present invention.
It should be noted that denitrification and desulfurization dedusting herein, refer to nitrogen oxides, oxysulfide and the flue dust removed in flue gas, to guarantee flue gas cleaning burning.
So, pre-dust removing units 10 can first be passed through, for instance, pre-dust removing units 10 can adopt cyclone separator or multi-tube dust cleaner, flue gas is carried out the pre-dedusting of dry method, it is possible to reduce the water yield, electricity, chemical feeding quantity, mud and sewage treating capacity in subsequent technique, reduce investment and operating cost；Subsequently, the flue gas after first time dedusting flows through heat exchanger, cigarette temperature can not only be reduced to the temperature range that gas cleaning unit 30 adapts, and the waste heat that can absorb flue gas utilizes, and improves system effectiveness, reduces energy consumption；Finally, flue gas after heat exchange realizes denitrification and desulfurization through gas cleaning unit 30, and carry out dedusting further, such as, gas cleaning unit 30 can pass through to aoxidize to neutralize reaction, first being nitrogen dioxide by the oxidation of nitric oxide in flue gas, then the deleterious acidic gas reaction such as ammonia and the nitrogen dioxide in flue gas, sulfur dioxide, sulfur trioxide generates ammonium salt, and by chemical fertilizer cogeneration unit 31, ammonium salt is easily separated proposition and is converted into recycling chemical fertilizer.Thus, the flue dust in flue gas, nitrogen oxides, Sulfur oxide high-efficiency can not only be removed by this gas cleaning recovery system with saving energy and reduce the cost, it is ensured that flue gas cleaning discharge, moreover it is possible to refuse is recycled.
In some embodiments, for overcoming the resistance of industrial boiler system flue gas, flue gas is delivered in chimney 40, between heat exchanger 20 and gas cleaning unit 30, is provided with the air-introduced machine 21 promoting flue gas to flow towards gas cleaning unit 30.
As one embodiment of the present invention, as shown in Figure 1, gas cleaning unit 30 includes tower body 32, it is arranged on the ammonia spray structure 33 in tower body 32 and oxidation promoter spray structure 34, the oxidation promoter feeding mechanism 35 being connected with oxidation promoter spray structure 34, the ammonia feeding mechanism 36 being connected with ammonia spray structure 33, ammonia spray structure 33 is positioned at the top of oxidation promoter spray structure 34, and oxidation promoter spray structure 34 is positioned at the top of gas approach of gas cleaning unit 30, so that the oxidation promoter generation oxidation reaction that first flue gas entered in gas cleaning unit 30 sprays with oxidation promoter spray structure 34, occur to neutralize reaction with the ammonia of ammonia spray structure 33 ejection subsequently, and be expelled in chimney 40 by the exhanst gas outlet of gas cleaning unit 30.
Wherein, the oxidation promoter in oxidation promoter feeding mechanism 35 can be transported in oxidation promoter spray structure 34 by water pump 39-6, so that oxidation promoter is with in spray pattern injection to tower body 32.
In other words, tower body 32 carries out oxidation as the nitrogen oxides in flue gas and oxysulfide and neutralizes the reacting environment of reaction, and owing to above-mentioned reaction carries out in the presence of water, thus, the dust in moisture absorption flue gas can be passed through, i.e. after pre-dust removing units 10 carries out the pre-dedusting of dry method, by gas cleaning unit 30, flue gas can also be carried out the final dedusting of wet method, it is ensured that the efficiency of dust collection of high efficient and reliable.
In other modes of texturing, oxidation promoter spray structure 34 may be located in the flue between the gas approach of air-introduced machine 21 and tower body 32, and in other words, oxidation promoter spray structure 34 may be located on the outside of tower body 32.
Wherein, oxidation promoter can be beneficial to the nitric oxide production material carrying out oxidation reaction for any, and the present invention is to this and is not limited as.Such as, as a kind of embodiment, oxidation promoter can be hydrogen peroxide solution.
In a preferred embodiment of the invention, the honeycomb texture 37 for accelerated oxidation reaction it is additionally provided with in gas cleaning unit 30, honeycomb texture 37 is provided with the catalyst for catalytic oxidation, such as, catalyst can be the material containing ferrous ion, and this honeycomb texture 37 is between the gas approach and ammonia spray structure 33 of gas cleaning unit 30.Specifically, this honeycomb texture 37 can be made up of ceramic material anticorrosive, resistant to elevated temperatures.That is, honeycomb texture 37 has three kinds of purposes: one, the oxidation reaction occurred as a kind of catalyst, catalysis nitric oxide and oxidation promoter；Two, flue gas is made can be evenly distributed in whole tower body 32；Three, the contact area of flue gas and oxidation promoter is increased.Thus, this honeycomb texture 37 can accelerate nitric oxide production oxidizing process, improves the efficiency of denitrification and desulfurization dedusting.
Further, ammonia feeding mechanism 36 includes industrial boiler water-supply device 360 and ammonia water generating device 361, wherein, what store in industrial boiler water-supply device 360 can be demineralized water, the outlet conduit of this industrial boiler water-supply device 360 includes separated first pipeline 362 and second pipe 363, for ease of improving emptying effectiveness, this industrial boiler water-supply device 360 can be respectively delivered in the first pipeline 362 and second pipe 363 by water pump 39-7, first pipeline 362 is for being transported in ammonia water generating device 361 by industrial boiler water-supply, to form ammonia spirit, second pipe 363 is for converging mutually with the liquid outlet of ammonia water generating device 361, and by water pump 39-5 by the liquid after converging by ammonia spray structure 33 with in spray pattern injection to tower body 32.Wherein, the effect of water pump 39-5 is to overcome the resistance in tubing, it is provided that the water of certain pressure forces ammonia with in spray pattern injection to tower body 32 after ammonia spray structure 33.That is, the industrial boiler water-supply of output from industrial boiler water-supply device 360, is first divided into current two strands different, once more converges subsequently, flow in tower body 32.So it is provided with two aspect benefits: one is, can so that configuration ammonia spirit and maintenance flushing pipe be independent of each other, specifically, when needs flushing pipe, the first pipeline 362 can be closed, open second pipe 363, when needs configure ammonia spirit, it is possible to open the first pipeline 362 and second pipe 363 simultaneously；Two are, increase the regulating measure of a kind of regulating water flow and ammonia concn.
Dust in flue gas enters after in tower body 32, can contact with water, and be dissolved in water and form mud, bottom for ease of mud rapid precipitation to tower body 32, the bottom of tower body 32 is formed as the taper sedimentation tank 320 that opening reduces from top to bottom, the bottom of taper sedimentation tank 320 is communicated with blowdown unit 321, and taper sedimentation tank 320 is connected with industrial boiler water-supply device 360 also by the 3rd pipeline 322, to ensure sufficient water source, connecting above through the 4th pipeline 323 of taper sedimentation tank 320 in tower body 32 with chemical fertilizer cogeneration unit 31.Due to, what tower body 32 was sequentially distributed from bottom to up is mud, ammonium salt solution and clear water, therefore, the 4th pipeline 323 is arranged in the top of taper sedimentation tank 320, it is possible to the ammonium salt solution making concentration bigger flows in chemical fertilizer cogeneration unit 31, carries out producing chemical fertilizer.
Wherein, as shown in Figure 1, blowdown unit 321 can include precipitation and filter pollution discharge pond 3211, it is arranged on precipitation and filters the cesspool 3212 below pollution discharge pond 3211, it is arranged on precipitation and filters the grab bucket 3210 of removing contamination above pollution discharge pond 3211, connect and filter the pipeline between pollution discharge pond 3211 at taper sedimentation tank 320 and precipitation, and be arranged on the delivery pump 39-1 on this pipeline.Transfer on blowdown car therefore, it is possible to precipitation is filtered the mud piled up in pollution discharge pond 3211 by grab bucket 3210 of removing contamination.
Wherein, as it is shown in figure 1, chemical fertilizer cogeneration unit 31 can include the defecator being communicated to taper sedimentation tank 320 by the 4th pipeline 323, it is positioned at the ammonium salt segregation apparatus in defecator downstream, is positioned at the ammonium salt extraction element in ammonium salt segregation apparatus downstream.Wherein, the 4th pipeline 323 can being arranged to the water pump 39-2 of conveying ammonium salt solution, above-mentioned defecator, ammonium salt segregation apparatus, the structure that ammonium salt extraction element is well known to the skilled person, therefore not to repeat here for the present invention.Such as, defecator can be drainage screen, to filter ammonium salt solution；Ammonium salt segregation apparatus, it is possible to for being isolated the device of the ammonium salt solution of high concentration by rotating centrifugal；Ammonium salt extraction element, it is possible to for the ammonium salt solution by the steam of uniform temperature certain pressure intensity blows to high concentration, to dry the device extracting ammonium salt.
For ease of making full use of water resource, the clean solution after filtration devices can also pass through the 5th pipeline 324 and be communicated in ammonia spray structure 33, and the 5th pipeline 324 can be provided with the water pump 39-3 for carrying clean solution.For improving the utilization rate of water resource further, the top of taper sedimentation tank 320 is also communicated with the 6th pipeline 325, the discharge outlet of the 6th pipeline 325 is communicated in ammonia spray structure 33, and the 6th the outlet of pipeline 325 higher than the outlet of the 4th pipeline 323, the 6th pipeline 325 can be provided with the water pump 39-4 for carrying clean solution.
For improving the utilization rate of water data, in tower body 32, it is provided with the demister 38 being positioned at above ammonia spray structure 33.That is, demister 38 can absorb the moisture in flue gas, the hydrogenesis in mist is become water droplet, separates, it is prevented that moisture is discharged in air with clean flue gas.
The present invention also provides for a kind of industrial boiler system, and this industrial boiler system includes pulverized-coal fired boiler 50 and the flue gas recovery device of the exhanst gas outlet connected at pulverized-coal fired boiler 50, and wherein, flue gas recovery device is the Industrial Boiler gas cleaning recovery system of above-detailed.So, the lime-ash discharged in pulverized-coal fired boiler 50 can pass through the first storehouse pump 12 and be transported in ash storehouse 13, and the flue gas discharged can obtain the purification of cleaning.
As a kind of embodiment, coal storage unit 60 that steam generator system also includes sequentially connecting from upstream to downstream, powder process unit 70, coal powder storage and supply unit 80, the meal outlet of coal powder storage and supply unit 80 is communicated on pulverized-coal fired boiler 50 by burner 90.Wherein, coal storage unit 60 is for storing the raw coal come from Coal Transportation and seal, powder process unit 70 is for crushing the coal dust carried from coal storage unit 60, dry, and collection coal dust, coal powder storage and supply unit 80 is for storing and seal the coal dust from powder process unit 70 milled, in order to ensure enough fully for powder amount, it is ensured that the smooth combustion of pulverized-coal fired boiler 50.
Wherein, coal dust all can be undertaken sealing protection by inert gas shielding unit by coal storage unit 60, powder process unit 70 and coal powder storage and supply unit 80.
As shown in Figure 1, coal storage unit 60 can include a coal storage canopy sealed, it is provided with ground reception bunker 62 in this coal storage canopy, it is positioned at the oscillating feeder 66 below the discharging opening of this ground reception bunker 62, the belt feeder 65 being connected with the discharge end of this oscillating feeder 66, being arranged on the tramp iron separator 64 on this belt feeder 65, this belt feeder 65 is for being transported to raw coal in the powder process unit 70 in downstream.
Wherein, in a preferred embodiment of the invention, powder process unit 70 can include the run coal bin 71 for receiving and store the raw coal carried by coal storage unit 60, for receiving and carry the batcher 72 of raw coal from the discharging opening of run coal bin 71, the coal pulverizer 73 being connected with the discharge end of batcher, the drying blower fan 74 being connected with coal pulverizer 73, the first powder collector 75 being connected with the meal outlet of coal pulverizer 73, the second powder collector 76 being connected with the gas outlet of the first powder collector 75, and the Pulverized Coal Bin 77 that the receipts powder mouth of the device 76 that is pollinated with the first powder collector 75 and second is connected, and first powder collector 75 receive powder precision less than the receipts powder precision of the second powder collector 76, the meal outlet of Pulverized Coal Bin 77 is connected with coal powder storage and supply unit 80.
It should be noted that the first powder collector 75 and second is pollinated, the receipts powder precision of device 76, is that the granular size of the coal dust collected with it is inversely proportional to, i.e. the particle diameter of the coal dust that the particle diameter of the coal dust that the first powder collector 75 is collected is collected more than the second powder collector 76.Such as, first powder collector 75 can be cyclone separator, can the major part of the coal dust of blowout in coal pulverizer 73 be collected in Pulverized Coal Bin 77, second powder collector 76 can be sack cleaner, can by the coal powder collection of less particle diameter that cannot collect in the first powder collector 75 to Pulverized Coal Bin 77, powder efficiency is received therefore, it is possible to improve.Wherein, the gas outlet of the second powder collector 76 can be communicated in independent chimney, it is also possible to is communicated in chimney 40, and the invention is not limited in this regard belongs in protection scope of the present invention.
So, as shown in Figure 1, the raw coal come from Coal Transportation from Coal Transportation is stored in the coal storage canopy of opposing seal or semitight, pile dump 63, raw coal is pushed away coal car 61 and pushes ground reception bunker 62 and can uniformly fall on belt feeder 65 after oscillating feeder 66, raw coal is transported in powder process unit 70 by belt feeder 65, and the qualified coal dust after broken, drying, collection passes through the second storehouse pump 78 and air compression system 100 is air conveying in coal powder storage and supply unit 80.By defeated powder blower fan 81, the coal in coal powder storage and supply unit 80 is blowed in entrance burner 93, realize the mixing of coal dust and wind, start to light, and provided secondary wind by 91 aerators, coal dust is fully burnt in pulverized-coal fired boiler, the cinder that burning produces can pass through slag storehouse 51 and be discharged to outside pulverized-coal fired boiler, and the flue gas that burning produces enters above-mentioned pre-dust removing units through the exhanst gas outlet of pulverized-coal fired boiler, such that it is able to realize flue gas cleaning discharge.
Wherein, air compression system 100 is the system for producing compression stroke, in order to carry out air conveying to material.
For ease of ensureing that boiler is stable, running safely, industrial boiler system also includes the control system for controlling powder process unit 70, coal powder storage and supply unit 80, burner 90, pulverized-coal fired boiler 50 and Industrial Boiler gas cleaning recovery system.
Therefore; whole industrial boiler system can contain the functional part required for each process procedure of coal dust firing; namely; coal storage unit 60, powder process unit 70, coal powder storage and supply unit 80, burner 90, pulverized-coal fired boiler 50, gas cleaning recovery system, control system, air compression system and inert gas shielding unit can be included; functional integration is high, and floor space is little, and operating cost is low; gas cleaning efficiency is high, it is possible to be widely used in the projects such as heat supply, steam supply, generating.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode, in order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. an Industrial Boiler gas cleaning recovery system, it is characterized in that, including the pre-dust removing units (10) for being connected with the exhanst gas outlet of boiler, the heat exchanger (20) being connected with the exhanst gas outlet of described pre-dust removing units (10), the gas cleaning unit (30) for denitrification and desulfurization dedusting being connected with the exhanst gas outlet of described heat exchanger (20), this gas cleaning unit (30) is also communicated with the chemical fertilizer cogeneration unit (31) for producing chemical fertilizer, the exhanst gas outlet of this gas cleaning unit (30) is for being connected with the chimney (40) of described boiler.
2. Industrial Boiler gas cleaning recovery system according to claim 1, it is characterized in that, described gas cleaning unit (30) includes tower body (32), it is arranged on the ammonia spray structure (33) in described tower body (32) and oxidation promoter spray structure (34), the oxidation promoter feeding mechanism (35) being connected with described oxidation promoter spray structure (34), the ammonia feeding mechanism (36) being connected with described ammonia spray structure (33), described ammonia spray structure (33) is positioned at the top of described oxidation promoter spray structure (34), and described oxidation promoter spray structure (34) is positioned at the top of gas approach of described gas cleaning unit (30), so that the oxidation promoter generation oxidation reaction that the flue gas entered in described gas cleaning unit (30) first sprays with described oxidation promoter spray structure (34), the ammonia sprayed with described ammonia spray structure (33) subsequently occurs to neutralize reaction, and be expelled in described chimney (40) by the exhanst gas outlet of described gas cleaning unit (30).
3. Industrial Boiler gas cleaning recovery system according to claim 2, it is characterized in that, the honeycomb texture (37) for accelerating described oxidation reaction it is additionally provided with in described gas cleaning unit (30), being provided with the catalyst of oxidation reaction described in catalysis on described honeycomb texture (37), this honeycomb texture (37) is positioned between gas approach and the described ammonia spray structure (33) of described gas cleaning unit (30).
4. Industrial Boiler gas cleaning recovery system according to claim 2, it is characterized in that, described ammonia feeding mechanism (36) includes industrial boiler water-supply device (360) and ammonia water generating device (361), the outlet conduit of this industrial boiler water-supply device (360) includes separated first pipeline (362) and second pipe (363), described first pipeline (362) is for being transported in described ammonia water generating device (361) by industrial boiler water-supply, to form ammonia spirit, described second pipe (363) is for converging mutually with the liquid outlet of described ammonia water generating device (361), and by water pump (39-5) by the liquid after converging by described ammonia spray structure (33) with in spray pattern injection extremely described tower body (32).
5. Industrial Boiler gas cleaning recovery system according to claim 4, it is characterized in that, the bottom of described tower body (32) is formed as the taper sedimentation tank (320) that opening reduces from top to bottom, the bottom of described taper sedimentation tank (320) is communicated with blowdown unit (321), and described taper sedimentation tank (320) is connected with described industrial boiler water-supply device (360) also by the 3rd pipeline (322), connecting with described chemical fertilizer cogeneration unit (31) above through the 4th pipeline (323) of described taper sedimentation tank (320).
6. Industrial Boiler gas cleaning recovery system according to claim 2, it is characterised in that be provided with the demister (38) being positioned at described ammonia spray structure (33) top in described tower body (32).
7. an industrial boiler system, flue gas recovery device including pulverized-coal fired boiler (50) with the exhanst gas outlet connected at described pulverized-coal fired boiler (50), it is characterized in that, described flue gas recovery device is Industrial Boiler gas cleaning recovery system according to any one of claim 1 to 6.
8. industrial boiler system according to claim 7, it is characterized in that, coal storage unit (60) that described steam generator system also includes sequentially connecting from upstream to downstream, powder process unit (70), coal powder storage and supply unit (80), the meal outlet of described coal powder storage and supply unit (80) is communicated on described pulverized-coal fired boiler (50) by burner (90).
9. industrial boiler system according to claim 8, it is characterized in that, described powder process unit (70) includes the run coal bin (71) for receiving and store the raw coal carried by described coal storage unit (60), for receiving and carry the batcher (72) of raw coal from the discharging opening of described run coal bin (71), the coal pulverizer (73) being connected with the discharge end of described batcher (72), the drying blower fan (74) being connected with described coal pulverizer (73), the first powder collector (75) being connected with the meal outlet of described coal pulverizer (73), the second powder collector (76) being connected with the gas outlet of described first powder collector (75), and the Pulverized Coal Bin (77) that the receipts powder mouth of the device (76) that is pollinated with described first powder collector (75) and described second is connected, and the receipts powder precision of described first powder collector (75) is less than the receipts powder precision of described second powder collector (76), the meal outlet of described Pulverized Coal Bin (77) is connected with described coal powder storage and supply unit (80).
10. industrial boiler system according to claim 8, it is characterized in that, described industrial boiler system also includes the control system for controlling described powder process unit (70), described coal powder storage and supply unit (80), described burner (90), described pulverized-coal fired boiler (50) and described Industrial Boiler gas cleaning recovery system.
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| CN201610235292.6A CN105709575A (en) | 2016-04-15 | 2016-04-15 | Industrial boiler flue gas purifying and recycling system and industrial boiler system |
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| CN201610235292.6A CN105709575A (en) | 2016-04-15 | 2016-04-15 | Industrial boiler flue gas purifying and recycling system and industrial boiler system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116907234A (en) * | 2023-09-11 | 2023-10-20 | 北京博鹏中科环保科技有限公司 | Dust removal mode switching system |
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Application publication date: 20160629 |