CN109550378A - Low-temp desulfurization denitration device and its technique in a kind of flue gas - Google Patents

Low-temp desulfurization denitration device and its technique in a kind of flue gas Download PDF

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Publication number
CN109550378A
CN109550378A CN201710881861.9A CN201710881861A CN109550378A CN 109550378 A CN109550378 A CN 109550378A CN 201710881861 A CN201710881861 A CN 201710881861A CN 109550378 A CN109550378 A CN 109550378A
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China
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partition
flue gas
absorption tower
flue
absorbing liquid
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CN201710881861.9A
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刘绍辉
黄乃乔
袁明辉
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PINGXIANG PUTIAN HI-TECH INDUSTRIAL Co Ltd
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PINGXIANG PUTIAN HI-TECH INDUSTRIAL Co Ltd
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Priority to CN201710881861.9A priority Critical patent/CN109550378A/en
Publication of CN109550378A publication Critical patent/CN109550378A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • 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
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/102—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention relates to low-temp desulfurization denitration devices in a kind of flue gas, including ash handling equipment, oxygen regulating device, absorption tower and absorbing liquid circulating slot, the ash handling equipment, oxygen regulating device passes sequentially through flue with absorption tower and is connected to, the front end of the ash handling equipment connects gas inlet, flow control valve is equipped between the gas inlet and ash handling equipment, the first temperature control equipment is equipped between the ash handling equipment and oxygen regulating device, second temperature control device is equipped between the oxygen regulating device and absorption tower, air-introduced machine is equipped between the second temperature control device and absorption tower, the first valve is equipped between first temperature control equipment and ash handling equipment, the absorbing liquid circulating slot is connect with absorption tower, the present invention can be sufficiently separated the particulate matter in flue gas, and by extending movement routine of the flue gas in absorption tower, prolong The long reaction time carries out abundant desulfurization and denitrification reaction to flue gas, so that flue gas reaches discharge standard.

Description

Low-temp desulfurization denitration device and its technique in a kind of flue gas
Technical field
The present invention relates to low-temp desulfurization denitration device and its works in flue gases purification field more particularly to a kind of flue gas Skill.
Background technique
In China denitrating flue gas market, it is China NO that catalysts selective, which restores (SCR) technology,XThe main skill of emission control Art, but its active temperature is at 380-420 DEG C, and coking flue gas is 180 DEG C or so after waste heat recycles, and is far below SCR catalyst Active temperature, for the operational characteristic of China's coking flue gas, recycling flue gas desulfurization and denitrification new technology under cryogenic conditions in research and development It is the important measures that China realizes sustainable development, huge economic benefit and environmental benefit will be brought.As flue gas desulfurization is de- The development of nitre technology, each state has all carried out the research of low-temperature flue gas simultaneous SO_2 and NO removal technology, but does not all have also both at home and abroad now There is mature low-temperature denitration technology, all in research and development and experimental stage, there is also more problems for existing technology, such as in flue gas Containing a large amount of particulate matter, desulphurization denitration is insufficient, and especially in wet process, particulate matter can largely effect on the de- of flue gas Sulphur denitration reaction influences flue gas and sufficiently reacts with coming into full contact with for absorbing liquid, so that flue gas emission is not up to standard.
Summary of the invention
In view of the above-mentioned state of the art, technical problem to be solved by the present invention lies in provide a kind of to be sufficiently separated Particulate matter in flue gas, and low-temp desulfurization denitration device in the flue gas of abundant desulfurization and denitrification reaction is carried out to the flue gas after separation And its technique.
The technical scheme of the invention to solve the technical problem is: low-temp desulfurization denitration device in a kind of flue gas, Including ash handling equipment, oxygen regulating device, absorption tower and absorbing liquid circulating slot, the ash handling equipment, oxygen regulating device and suction It receives tower and passes sequentially through flue connection, the front end of the ash handling equipment connects gas inlet, the gas inlet and ash handling equipment Between be equipped with flow control valve, between the ash handling equipment and oxygen regulating device be equipped with the first temperature control equipment, the oxygen It is equipped with second temperature control device between gas control device and absorption tower, is set between the second temperature control device and absorption tower There is air-introduced machine, the first valve, the absorbing liquid circulating slot and suction are equipped between first temperature control equipment and ash handling equipment Receive tower connection；
The ash handling equipment includes hair dryer, the air jet pipe connecting with hair dryer, dust collecting box, filter screen and ceramic filter The top of the flue section between flow control valve and the first valve is arranged in plate, the air jet pipe, which passes through pipe Road is connected with the hair dryer being arranged in outside flue, the flue section between the flow control valve and the first valve Bottom is provided with the ash discharging hole being connected to dust collecting box, and the lower section of the ash discharging hole is equipped with the second valve, and the filter screen is arranged in ash discharge The surface of mouth, the area of the filter screen and the cross-sectional area of flue are identical, and the ceramic filter plate is arranged in filter screen In flue between the first valve；
It is provided with baffle assembly in the absorption tower, which includes first to be from bottom to top equidistantly staggered Partition, second partition, third partition and the 4th partition, the first partition, second partition, third partition, the 4th partition etc. are big, The first partition, third partition, is provided with multiple funnel-shaped holes on the 4th partition at second partition, and the multiple funnel-shaped hole is close Collection is arranged on partition, and described be staggered refers to, first partition and third partition are arranged in the same side on absorption tower, second every Side opposite with first partition, third partition in absorption tower is arranged in the 4th partition in plate, and second partition front end protrudes into Between one partition and third partition, third plate front end is protruded between second partition and the 4th partition；
Bottom centre position in the absorption tower is equipped with agitator arm, and the agitator arm is described by motor driven Top in absorption tower is equipped with spray tube, and the top of the spray tube is equipped with filling adsorption layer, and the spray tube is by pipeline and absorbs The connection of liquid circulating slot, the bottom on the absorption tower are equipped with liquid outlet, which passes through the bottom of pipeline and absorbing liquid circulating slot Connection, the gas outlet to discharge flue gas after purification is provided at the top of absorption tower, and absorb the bottom of the tower is opened with flue junction There is air inlet, the first partition is arranged above air inlet.
Further, the big opening end of the funnel-shaped hole is towards at the top of absorption tower, and osculum end is and big towards absorb the bottom of the tower Mouthful end is flushed with partition upper surface, and osculum end is downwardly projected partition lower surface, the up big and down small structure setting of funnel-shaped hole, so that When absorbing liquid spray is on partition, can be passed through from funnel-shaped hole, as the diminution in aperture forms thread, and cooperate first every Plate, second partition, third partition, the 4th partition are from bottom to top staggered and multiple funnel-shaped holes are densely arranged in partition On, multi-stage spray can be formed, so that absorbing liquid comes into full contact with flue gas, thus to the NO in flue gasX、SO2It carries out sufficiently de- It removes, in addition, first partition, second partition, third partition, the 4th partition are from bottom to top staggered, when absorbing liquid floods partition When, partition can obstruct flue gas and directly move straight up, so that flue gas is moved along baffle surface, extend the mobile road of flue gas Diameter, to extend the haptoreaction time of flue gas and absorbing liquid, so that absorbing liquid comes into full contact with flue gas, thus in flue gas NOX、SO2Sufficiently removed.
Further, the absorbing liquid circulating slot is also connected with waste liquid device, which can recycle circulation fluid.
Further, the distance at the top of the air jet pipe to flue is greater than zero, which is circumferentially with multiple sprays Stomata, the distance at the top of air jet pipe to flue are greater than zero, so that can when dust stratification in air jet pipe liquid honing flue It is more comprehensive to clear up, prevent dust stratification.
Further, microseism device is equipped at the center of the filter screen, the ash on filter screen can be shaken off, is convenient for by microseism device Deashing.
Further, the ash discharging hole is funnel-shaped, is convenient to clean the grey wall surface along funnelform ash discharging hole to get off It falls into dust collecting box.
Further, the distance between the first partition, second partition, third partition and the 4th partition are greater than zero, should First partition, second partition, third partition and the 4th partition length be greater than the width of absorption tower half so that partition staggered row Column form bypass channel, extend the movement routine of flue gas.
Further, the spray tube is equipped with multiple spray heads, and the spray head and spray tube are rotatablely connected, so that absorbing Liquid multi-faceted can spray.
Further, the filling adsorption layer is active carbon layer, further purification discharge flue gas.
The technique that desulphurization denitration is carried out using above-mentioned flue gas desulfurization and denitrification equipment, is included the following steps:
A, the flue gas that temperature is 160-180 DEG C after waste heat recycling first passes through ash handling equipment and carries out ash disposal processing；
B, ash disposal treated flue gas passes through the first temperature control equipment, and adjusting flue-gas temperature is 130-150 DEG C, by flue gas It is passed through in oxygen regulating device and is reacted, promote NOXIt is converted into NO2；
C, the flue gas after reacting with oxygen passes through second temperature control device, and adjusting flue-gas temperature is 110-130 DEG C, flue gas Enter absorption tower from the air inlet of absorb the bottom of the tower by air-introduced machine and carries out desulfurization and denitrification reaction；
D, the absorbing liquid in absorbing liquid circulating slot is sprayed into absorption tower by the spray tube in absorption tower, in spray, is inhaled It receives liquid and forms multi-stage spray by the funnel-shaped hole on first partition, second partition, third partition, the 4th partition, and cooperate and stir The agitation for mixing impeller, to the NO in flue gasX、SO2It is sufficiently removed, and is absorbed and filter by filling adsorption layer, so that flue gas Reach discharge standard, is discharged from absorption tower top gas outlet, when absorbing liquid did not had four partitions, controls the spray flow on absorption tower It is balanced with the discharge amount of absorb the bottom of the tower liquid outlet, which send the liquid product in absorption tower into absorbing liquid circulating slot It is interior；
E, circulation fluid in absorbing liquid circulating slot introduce waste liquid device handled, recycling, be eventually converted into sulphur Hydrochlorate and nitrate mixture.
Compared with the prior art, the advantages of the present invention are as follows: the present invention carries out flue gas dual by setting ash handling equipment Filtering first carries out by-pass filtration to flue gas by filter screen, filters out the biggish dust of particle, then carry out second level by ceramic filter plate Filtering, ceramic filter plate have the characteristics that the obstructed ash of ventilation, can separate the particulate matter in flue gas with gas completely, to keep away Exempting from particulate matter influences the desulfurization and denitrification reaction of flue gas, in addition, the setting of oxygen regulating device, so that NO in flue gasXIt is converted into NO2, convenient for the absorption of absorbing liquid, thus desulphurization denitration as sufficient as possible, finally, by the way that partition group is arranged in absorption tower Part, the baffle assembly include the first partition being from bottom to top equidistantly staggered, second partition, third partition and the 4th every Plate forms bypass channel, extends the movement routine of flue gas, and cooperate funnel-shaped hole densely arranged on partition, so that absorbing liquid It when spraying on partition, can be passed through from funnel-shaped hole, as the diminution in aperture forms thread, and cooperate first partition, Two partitions, third partition, the 4th partition are from bottom to top staggered and multiple funnel-shaped holes are densely arranged on partition, can To form multi-stage spray, and motor driven agitator arm is cooperated to stir absorbing liquid, greatly increases movement of the flue gas in absorbing liquid Activity, so that absorbing liquid comes into full contact with flue gas, thus to the NO in flue gasX、SO2Sufficiently removed, in addition, first every Plate, second partition, third partition, the 4th partition are from bottom to top staggered, and when absorbing liquid floods partition, partition can be obstructed Flue gas directly moves straight up, so that flue gas is moved along baffle surface, extends the movement routine of flue gas, to extend flue gas With the haptoreaction time of absorbing liquid so that absorbing liquid comes into full contact with flue gas, thus to the NO in flue gasX、SO2It carries out abundant Removing, reaches standard limit of smog release.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the top view of partition of the present invention；
Fig. 3 is the cross-sectional view of partition of the present invention；
As shown, 1 absorption tower, 1.1 air inlets, 1.2 gas outlets, 1.3 liquid outlets, 2 oxygen regulating devices, 3 first temperature Degree control device, 4 second temperature control devices, 5 air-introduced machines, 6 absorbing liquid circulating slots, 7 gas inlets, 8 flues, 9 first Partition, 10 second partitions, 11 third partitions, 12 the 4th partitions, 13 funnel-shaped holes, 14 spray tubes, 15 spray heads, 16 filling adsorptions Layer, 17 waste liquid devices, 18 flow control valves, 19 first valves, 20 second valves, 21 ash discharging holes, 22 dust collecting boxes, 23 ceramic filters Plate, 24 filter screens, 25 hair dryers, 26 air jet pipes, 27 microseism devices, 28 agitator arms, 29 motors.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
As shown in Figure 1-3, low-temp desulfurization denitration device in a kind of flue gas, including ash handling equipment, oxygen regulating device 2, suction Tower 1 and absorbing liquid circulating slot 6 are received, the ash handling equipment, oxygen regulating device 2 and absorption tower 1 pass sequentially through the company of flue 8 Logical, the front end of the ash handling equipment connects gas inlet 7, and flow control valve 18 is equipped between the gas inlet 7 and ash handling equipment, The first temperature control equipment 3, the oxygen regulating device 2 and absorption are equipped between the ash handling equipment and oxygen regulating device 2 It is equipped with second temperature control device 4 between tower 1, air-introduced machine 5, institute are equipped between the second temperature control device 4 and absorption tower 1 It states and is equipped with the first valve 19 between the first temperature control equipment 3 and ash handling equipment, the absorbing liquid circulating slot 6 connects with absorption tower 1 It connects；
The ash handling equipment include hair dryer 25, the air jet pipe being connect with hair dryer 25 26, dust collecting box 22, filter screen 24 and The top of the flue section between flow control valve 18 and the first valve 19 is arranged in ceramic filter plate 23, the air jet pipe 26 Portion, the air jet pipe 26 are connected by pipeline with the hair dryer 25 being arranged in outside flue, the flow control valve 18 and the The bottom of flue section between one valve 19 is provided with the ash discharging hole 21 being connected to dust collecting box 22, and the lower section of the ash discharging hole 21 is set There is the second valve 20, the surface of ash discharging hole 21 is arranged in the filter screen 24, area and the flue 8 of the filter screen 24 Cross-sectional area is identical, and the ceramic filter plate 23 is arranged in the flue between filter screen 24 and the first valve 19；
It is provided with baffle assembly in the absorption tower 1, which includes to be from bottom to top equidistantly staggered One partition 9, second partition 10, third partition 11 and the 4th partition 12, the first partition 9, second partition 10, third partition 11, the 4th partition 12 etc. is big, which second partition 10, third partition 11, is provided with multiple leakages on the 4th partition 12 Bucket shape hole 13, the multiple funnel-shaped hole 13 is densely arranged on partition, and described be staggered refers to, first partition 9 and third Partition 11 is arranged in the same side on absorption tower 1, second partition 10 and the 4th partition 12 be arranged in absorption tower 1 with first partition 9, The opposite side of third partition 11, and 10 front end of second partition is protruded between first partition 9 and third partition 11, third partition 11 Front end is protruded between second partition 10 and the 4th partition 12；
Bottom centre position in the absorption tower 1 is equipped with agitator arm 28, which is driven by motor 29 Dynamic, the top in the absorption tower 1 is equipped with spray tube 14, and the top of the spray tube 14 is equipped with filling adsorption layer 16, the spray tube 14 are connect by pipeline with absorbing liquid circulating slot 6, and the bottom on the absorption tower 1 is equipped with liquid outlet 1.3, which passes through Pipeline is connected to the bottom of absorbing liquid circulating slot 6, the top on absorption tower 1 be provided with to discharge purification after flue gas gas outlet 1.2, 1 bottom of absorption tower and 8 junction of flue are provided with air inlet 1.1, and the first partition 9 is arranged above air inlet 1.1.
The big opening end of the funnel-shaped hole 13 is towards the top of absorption tower 1, and osculum end is towards 1 bottom of absorption tower, and big opening end It is flushed with partition upper surface, osculum end is downwardly projected partition lower surface, the up big and down small structure setting of funnel-shaped hole 13, so that inhaling When receiving liquid spray on partition, can be passed through from funnel-shaped hole 13, as the diminution in aperture forms thread, and cooperate first every Plate 9, second partition 10, third partition 11, the 4th partition 12 are from bottom to top staggered and multiple funnel-shaped holes 13 are intensively arranged Cloth can form multi-stage spray on partition, so that absorbing liquid comes into full contact with flue gas, thus to the NO in flue gasX、SO2It carries out Sufficiently removing, in addition, first partition 9, second partition 10, third partition 11, the 4th partition 12 are from bottom to top staggered, works as suction When receipts liquid floods partition, partition can obstruct flue gas and directly move straight up, so that flue gas is moved along baffle surface, extend The movement routine of flue gas, thus extend the haptoreaction time of flue gas and absorbing liquid, so that absorbing liquid comes into full contact with flue gas, from And to the NO in flue gasX、SO2Sufficiently removed.
The absorbing liquid circulating slot 6 is also connected with waste liquid device 17, which can recycle circulation fluid.
The distance at the air jet pipe 26 to 8 top of flue is greater than zero, which is circumferentially with multiple fumaroles, The distance at air jet pipe 26 to the top of flue 8 is greater than zero, so that can when dust stratification in 26 liquid honing flue of air jet pipe It is more comprehensive to clear up, prevent dust stratification.
Microseism device 27 is equipped at the center of the filter screen 24, the ash on filter screen 24 can be shaken off, is convenient for by microseism device 27 Deashing.
The ash discharging hole 21 is funnel-shaped, is convenient to clean the ash to get off and falls into collection along the wall surface of funnelform ash discharging hole 21 In cinder box 22.
The distance between the first partition 9, second partition 10, third partition 11 and the 4th partition 12 are greater than zero, this One partition 9, second partition 10, third partition 11 and the 4th partition 12 length be greater than the width of 1 half of absorption tower so that partition It is staggered, forms bypass channel, extend the movement routine of flue gas.
The spray tube 14 is equipped with multiple spray heads 15, and the spray head 15 and spray tube 14 are rotatablely connected, so that absorbing Liquid multi-faceted can spray.
The filling adsorption layer 16 is active carbon layer, further purification discharge flue gas.
Working principle: opening the first valve 19, closes the second valve 20, the cigarette that temperature is 160-180 DEG C after waste heat recycling Gas enters flue 8 from gas inlet 7, and by the adjustable flue gas flow of flow control valve 18, flue gas initially enters ash disposal Device first passes through filter screen 24 and carries out by-pass filtration, filters out the biggish dust of partial size, which, which can accumulate, is attached to 24 table of filter screen Face carries out secondary filtration using ceramic filter plate 23, and ceramic filter plate 23 has the characteristics that ventilation is obstructed grey, can will be in flue gas Particulate matter separated completely with gas, the dust filtered out is gathered in the flue gas between flow control valve 18 and the first valve 19 In duct section, to avoid the desulfurization and denitrification reaction of particulate matter influence flue gas；
Flue gas after ash disposal enters the first temperature control equipment 3, and flue-gas temperature is adjusted to 140 DEG C, then arranges flue gas Enter and reacted in oxygen regulating device 2, since absorbing liquid is to NO2Absorption be better than the absorption to NO, so as far as possible NO is promoted to be oxidized to NO2, when flue-gas temperature is at 140 DEG C, the NO in flue gas is reacted with oxygen is converted to NO2Condition is best, so 3 temperature adjustment of the first temperature control equipment is first passed through before flue gas is reacted with oxygen to 140 DEG C；
Flue gas after peroxidization enters second temperature control device 4, flue-gas temperature is adjusted to 115 DEG C, the temperature Under degree, the desulfurization and denitrification reaction of flue gas is best, and flue gas is then discharged into absorption from the air inlet 1.1 on absorption tower 1 by air-introduced machine 5 In tower 1, the absorbing liquid in absorbing liquid circulating slot 6 is sprayed into absorption tower 1 by the spray tube 14 in absorption tower 1, on spray tube 14 Spray head 15 multidirectional can adjust, realize the multi-faceted spray of all standing,, can when absorbing liquid spray is on partition in spray To be passed through from funnel-shaped hole 13, as the diminution in aperture forms thread, and cooperate first partition 9, second partition 10, third every Plate 11, the 4th partition 12 are from bottom to top staggered and multiple funnel-shaped holes 13 are densely arranged on partition, can be formed more Grade spray, so that absorbing liquid comes into full contact with flue gas, in addition, first partition 9, second partition 10, third partition 11, the 4th partition 12 are from bottom to top staggered, and when absorbing liquid floods partition, partition can obstruct flue gas and directly move straight up, so that cigarette Gas is moved along baffle surface, and flue gas successively bypasses first partition 9, second partition 10, third partition after the entrance of air inlet 1.1 11, the 4th partition 12 detours upwards, extends the movement routine of flue gas, thus extend the haptoreaction time of flue gas and absorbing liquid, And when absorbing liquid floods first partition 9, flue gas is passed through absorbing liquid, opens motor 29 and agitator arm 28 is driven to stir absorbing liquid, The mobile activity for increasing flue gas, so that absorbing liquid comes into full contact with flue gas, thus to the NO in flue gasX、SO2It carries out sufficiently de- It removes, and is absorbed and filter by active carbon layer, so that flue gas reaches discharge standard, is discharged from 1 top gas outlet 1.2 of absorption tower, When absorbing liquid did not had four partitions 12, the discharge amount of the spray flow and 1 bottom liquid outlet 1.3 of absorption tower that control absorption tower 1 is flat Liquid product in absorption tower 1 is sent into absorbing liquid circulating slot 6 by weighing apparatus, the liquid outlet 1.3, the circulation in absorbing liquid circulating slot 6 Liquid introduce waste liquid device 17 handled, recycling, be eventually converted into sulfate and nitrate mixture, the present invention is inhaling It receives in the reacting of liquid and flue gas, sprayed before this, after then liquid to be absorbed did not had air inlet 1.1, flue gas is to be passed through in absorbing liquid again Spray, and flue gas extends movement routine during uplink, and cooperates the agitation of agitator arm 28, so that flue gas and absorption Liquid comes into full contact with, and extends soak time, thus to the NO in flue gasX、SO2Sufficiently removed.
In addition, closing flow control valve 18 and the first valve 19 when handling the dust stratification in ash handling equipment, the second valve is opened 20, hair dryer 25 is opened, the dust stratification in flue is cleared up by air jet pipe 26,25 air quantity of hair dryer is adjusted, will accumulate Ash is blown off to ash discharging hole 21, and the dust stratification on filter screen 24 shakes to shake off ash to ash discharging hole 21 by microseism device 27, the filtering The setting of net 24 is right above ash discharging hole 21, and convenient for shaking off the ash on filter screen 24 to ash discharging hole 21, dust stratification passes through ash discharging hole 21 fall into dust collecting box 22.
The technique that desulphurization denitration is carried out using above-mentioned flue gas desulfurization and denitrification equipment, is included the following steps:
A, the flue gas that temperature is 160-180 DEG C after waste heat recycling first passes through ash handling equipment and carries out ash disposal processing；
B, ash disposal treated flue gas passes through the first temperature control equipment 3, and adjusting flue-gas temperature is 140 DEG C, and flue gas is led to Enter and reacted in oxygen regulating device 2, promotes NOXIt is converted into NO2；
C, the flue gas after reacting with oxygen passes through second temperature control device 4, and adjusting flue-gas temperature is 115 DEG C, and flue gas is logical It crosses air-introduced machine 5 and enters the progress of absorption tower 1 desulfurization and denitrification reaction from the air inlet 1.1 of 1 bottom of absorption tower；
D, the absorbing liquid in absorbing liquid circulating slot 6 is sprayed into absorption tower 1 by the spray tube 14 in absorption tower 1, is being sprayed In, absorbing liquid forms multistage by the funnel-shaped hole 13 on first partition 9, second partition 10, third partition 11, the 4th partition 12 Spray, and cooperate the agitation of agitator arm 28, to the NO in flue gasX、SO2It is sufficiently removed, and is adsorbed by active carbon layer Filtering is discharged, when absorbing liquid did not had the 4th partition 12 so that flue gas reaches discharge standard from 1 top gas outlet 1.2 of absorption tower When, the discharge amount of the spray flow and 1 bottom liquid outlet 1.3 of absorption tower that control absorption tower 1 balances, and the liquid outlet 1.3 is by absorption tower 1 Interior liquid product is sent into absorbing liquid circulating slot 6；
E, circulation fluid in absorbing liquid circulating slot 6 introduce waste liquid device 17 handled, recycling, be eventually converted into Sulfate and nitrate mixture.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of skill in the art that it still can be right Technical solution documented by foregoing embodiments is modified, or is replaced on an equal basis to part of technical characteristic；And this It modifies or replaces, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution It encloses.

Claims (10)

1. low-temp desulfurization denitration device in a kind of flue gas, which is characterized in that including ash handling equipment, oxygen regulating device (2), absorb Tower (1) and absorbing liquid circulating slot (6), the ash handling equipment, oxygen regulating device (2) and absorption tower (1) pass sequentially through fume pipe The front end of road (8) connection, the ash handling equipment connects gas inlet (7), and stream is equipped between the gas inlet (7) and ash handling equipment Adjustable valve (18) is equipped with the first temperature control equipment (3) between the ash handling equipment and oxygen regulating device (2), the oxygen Between gas control device (2) and absorption tower (1) be equipped with second temperature control device (4), the second temperature control device (4) with Air-introduced machine (5) are equipped between absorption tower (1), the first valve is equipped between first temperature control equipment (3) and ash handling equipment (19), the absorbing liquid circulating slot (6) connect with absorption tower (1)；
Air jet pipe (26), the dust collecting box (22), filter screen that the ash handling equipment includes hair dryer (25), connect with hair dryer (25) (24) and ceramic filter plate (23), the cigarette that the air jet pipe (26) is arranged between flow control valve (18) and the first valve (19) The top of feed channel section, which is connected by pipeline with the hair dryer (25) being arranged in outside flue, described The bottom of flue section between flow control valve (18) and the first valve (19) is provided with the ash discharge being connected to dust collecting box (22) The lower section of mouthful (21), the ash discharging hole (21) is equipped with the second valve (20), filter screen (24) setting ash discharging hole (21) just The area of top, the filter screen (24) is identical as the cross-sectional area of flue (8), and the ceramic filter plate (23) is arranged in mistake In flue between strainer (24) and the first valve (19)；
It is provided with baffle assembly in the absorption tower (1), which includes first to be from bottom to top equidistantly staggered Partition (9), second partition (10), third partition (11) and the 4th partition (12), the first partition (9), second partition (10), Third partition (11), the 4th partition (12) etc. are big, the first partition (9), second partition (10), third partition (11), the 4th every It is provided on plate (12) multiple funnel-shaped holes (13), the multiple funnel-shaped hole (13) is densely arranged on partition, described to interlock Setting refers to that first partition (9) and third partition (11) are arranged in the same side of absorption tower (1), second partition (10) and the 4th Partition (12) is arranged in absorption tower (1) and the opposite side of first partition (9), third partition (11), and second partition (10) Front end is protruded between first partition (9) and third partition (11), and second partition (10) and the 4th are protruded into third partition (11) front end Between partition (12)；
Bottom centre position in the absorption tower (1) is equipped with agitator arm (28), which passes through motor (29) it drives, the top in the absorption tower (1) is equipped with spray tube (14), and the top of the spray tube (14) is equipped with filling adsorption layer (16), which is connect by pipeline with absorbing liquid circulating slot (6), and the bottom of the absorption tower (1) is equipped with liquid outlet (1.3), which is connected to by pipeline with the bottom of absorbing liquid circulating slot (6), and absorption tower is provided with use at the top of (1) With the gas outlet (1.2) of flue gas after discharge purification, absorption tower (1) bottom and flue (8) junction are provided with air inlet (1.1), first partition (9) setting is above air inlet (1.1).
2. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the funnel-shaped hole (13) big opening end is towards absorption tower (1) top, and osculum end is towards absorption tower (1) bottom, and big opening end and partition upper surface are neat Flat, osculum end is downwardly projected partition lower surface.
3. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the absorbing liquid circulation Slot (6) is also connected with waste liquid device (17).
4. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the air jet pipe (26) Distance at the top of to flue (8) is greater than zero, which is circumferentially with multiple fumaroles.
5. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the filter screen (24) Center at be equipped with microseism device (27).
6. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the ash discharging hole (21) It is funnel-shaped.
7. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the first partition (9), the distance between second partition (10), third partition (11) and the 4th partition (12) are greater than zero, the first partition (9), the The length of two partitions (10), third partition (11) and the 4th partition (12) is greater than the width of absorption tower (1) half.
8. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the spray tube (14) It is equipped with multiple spray heads (15), the spray head (15) and spray tube (14) are rotatablely connected.
9. low-temp desulfurization denitration device in a kind of flue gas according to claim 1, which is characterized in that the filling adsorption layer It (16) is active carbon layer.
10. using the technique of low-temp desulfurization denitration device progress desulphurization denitration in a kind of flue gas described in claim 1, feature It is, includes the following steps:
A, the flue gas that temperature is 160-180 DEG C after waste heat recycling first passes through ash handling equipment and carries out ash disposal processing；
B, ash disposal treated flue gas passes through the first temperature control equipment (3), and adjusting flue-gas temperature is 130-150 DEG C, by flue gas It is passed through in oxygen regulating device (2) and is reacted, promote NOXIt is converted into NO2；
C, the flue gas after reacting with oxygen passes through second temperature control device (4), and adjusting flue-gas temperature is 110-130 DEG C, flue gas Enter absorption tower (1) from the air inlet (1.1) of absorption tower (1) bottom by air-introduced machine (5) and carries out desulfurization and denitrification reaction；
D, the absorbing liquid in absorbing liquid circulating slot (6) is sprayed into absorption tower (1) by the spray tube (14) in absorption tower (1), In spray, absorbing liquid is by the infundibulate on first partition (9), second partition (10), third partition (11), the 4th partition (12) Hole (13) forms multi-stage spray, and cooperates the agitation of agitator arm (28), to the NO in flue gasX、SO2Sufficiently removed, and by Filling adsorption layer (16) is absorbed and filter, so that flue gas reaches discharge standard, is arranged from absorption tower (1) top gas outlet (1.2) Out, when absorbing liquid did not had the 4th partition (12), the spray flow and absorption tower (1) bottom liquid outlet (1.3) of absorption tower (1) are controlled Discharge amount balance, the liquid outlet (1.3) by absorption tower (1) liquid product be sent into absorbing liquid circulating slot (6) in；
E, circulation fluid in absorbing liquid circulating slot (6) introduce waste liquid device (17) handled, recycling, be eventually converted into Sulfate and nitrate mixture.
CN201710881861.9A 2017-09-26 2017-09-26 Low-temp desulfurization denitration device and its technique in a kind of flue gas Pending CN109550378A (en)

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Application publication date: 20190402