CN109675433A - A kind of flue-gas denitration process - Google Patents
A kind of flue-gas denitration process Download PDFInfo
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- CN109675433A CN109675433A CN201910071522.3A CN201910071522A CN109675433A CN 109675433 A CN109675433 A CN 109675433A CN 201910071522 A CN201910071522 A CN 201910071522A CN 109675433 A CN109675433 A CN 109675433A
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- gear
- cavity
- supporting element
- ontology
- longitudinal direction
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- 239000003546 flue gas Substances 0.000 title claims abstract description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 title claims abstract description 15
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007787 solid Substances 0.000 claims abstract description 18
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004202 carbamide Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000003517 fume Substances 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 235000004443 Ricinus communis Nutrition 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000002411 adverse Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 17
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000010531 catalytic reduction reaction Methods 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 description 13
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- -1 flue-gas Nitrogen oxides Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000019788 craving Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- 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
- 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
-
- 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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of flue-gas denitration process, comprising the following steps: S1: urea solid powder mull is crushed to 100-300 mesh；S2: mode of the urea with water by ultrasonic wave added stirring after grinding is uniformly mixed；S3: carrying out counter current contacting with the hot fume containing nitrogen oxides after above-mentioned mixed liquor is preheated to 100-300 DEG C by heater, and nitrogen oxides is reduced into nitrogen discharge under the effect of the catalyst, and the mixed liquor for not participating in reaction recycles after collecting.The selective-catalytic-reduction denitrified method of the present invention, the mass transfer effect of gas-liquid two-phase is good, and the removal efficiency of nitrogen oxides is high；Used flue gas denitrification system stable and reliable operation, occupied area is small, compact-sized, easy to operate, is conducive to large-scale promotion application.
Description
Technical field
The present invention relates to gas denitrifying technology fields, more particularly to a kind of flue-gas denitration process.
Background technique
With the development of industry and the improvement of people's living standards, the craving of the energy is also continuously increased, in coal-fired flue-gas
Nitrogen oxides the main reason for having become atmosphere pollution.The pollution for reducing nitrogen oxides has become current atmospheric environment and administers
The task of top priority.Many flue-gas denitration process are widely applied in the industry, control all kinds of boilers and tail gas from incinerator
Reason also has important practical significance.
Currently, the control of nitrogen oxides mainly has 3 kinds of ways such as burning pre-treatment, the improvement of combustion system and burning post-processing
Diameter, but gas denitrifying technology is the important method for controlling discharged nitrous oxides after burning, and the nitrogen oxides in most of flue gas is all
It is to be handled by the method.Denitrating technique mainly includes absorption process, active carbon adsorption, electron beam denitration method and urges after burning
Change reduction method, wherein in SCR technology, reducing agent and nitrogen oxides in effluent under the effect of the catalyst so that
Conversion of nitrogen oxides is nitrogen, thus meet flue gas emission requirement, but existing flue gas denitrification system process flow is complicated, accounts for
Ground area is big, investment is high, high equipment cost, in particular for some small-sized boilers and tail gas from incinerator, existing denitration device
It is difficult to meet matching in newly-built or transformation process.
Therefore it needs to research and develop a kind of denitration method for flue gas and mating a device of research and development, to meet medium small boiler and burning
The needs of kiln gas denitration.
Summary of the invention
In view of in place of above the deficiencies in the prior art, the main purpose of the present invention is to provide a kind of flue-gas denitration process,
It is uniformly mixed so as to be stirred after urea solid powder mull is broken with water as reducing agent solution, the reducing agent solution and cigarette
Nitrogen oxides in gas sufficiently counter current contacting and can carry out denitration reaction under the effect of the catalyst, improve the biography of gas-liquid two-phase
While matter effect, the removal efficiency of nitrogen oxides in effluent is also improved.
To achieve the above objectives, the technical solution adopted by the present invention are as follows:
A kind of flue-gas denitration process, comprising the following steps:
S1: urea solid powder mull is crushed to 100-300 mesh；
S2: mode of the urea with water by ultrasonic wave added stirring after grinding is uniformly mixed；
S3: it is carried out after above-mentioned mixed liquor is preheated to 100-300 DEG C by heater with the hot fume containing nitrogen oxides
Nitrogen oxides is reduced into nitrogen discharge under the effect of the catalyst by counter current contacting, and after the mixed liquor for not participating in reaction is collected
It recycles.
It carries out the flue gas denitrification system of denitrating flue gas processing using above-mentioned flue-gas denitration process, including ontology and is fixed on
Air inlet pipe, escape pipe, outlet tube and packing layer, the air inlet pipe on ontology are arranged close to the side wall of the body bottom portion
On, the outlet tube is mounted on the bottom of the ontology, and castor, the ontology top are also equipped on the ontology supporting leg
The left and right sides is separately installed with dosing tank and water tank, and top dead center position is equipped with motor, and the body interior leans on close over
Position is fixed with the first supporting element, and the lower position of first supporting element is fixed with the second supporting element, the escape pipe installation
On this body sidewall close to the second supporting element lower position；The motor lower end is connected with first rotating shaft along the longitudinal direction
And the second supporting element lower position is extended to, the first rotating shaft is successively fixed with planetary gear, the second tooth from top to bottom
Wheel, agitating paddle and shower tray, and the planetary gear and second gear add positioned at what is be made of first supporting element and ontology
In medicine section, the agitating paddle is located in the stirring section being made of first supporting element, the second supporting element and ontology, the spray
Disk is located in the denitration section being made of second supporting element and ontology, and described filler layer is mounted on the shower tray and air inlet pipe
Transversely and horizontally between face；The dosing tank bottom is equipped with T-type cavity, and the vertical cavity segment of the T-type cavity is arranged in horizontal blank
The left side of chamber section and the bottom of the dosing tank and the top of the ontology are extended downwardly through along the longitudinal direction, while along longitudinal direction
Direction extends upwardly to dosing tank top inner wall, and third gear, the third tooth are equipped in the horizontal cavity of the T-type cavity
Wheel passes through on the rotatable bottom level cavity for being fixed on dosing tank of the second shaft on lower wall, and sets on the third gear
There is the first through hole penetrated through along the longitudinal direction, is equipped in the vertical cavity of the T-type cavity and is nibbled with the third gear
The second worm screw of transmission is closed, the lower end of second worm screw, which is connected to, to be arranged on the left of second gear and engage biography with second gear
At dynamic first gear center；It is respectively equipped with and the first through hole phase in the two sides up and down of the horizontal cavity section of the T-type cavity
Corresponding first charging aperture and the first feed pipe, first feed pipe extend downwardly along the longitudinal direction and be arranged on planetary gear
The first discharge port it is corresponding, first discharge port runs through planetary gear along the longitudinal direction and is arranged at the sun gear of center；
The water tank is sequentially connected by the feeding mechanism and second gear being mounted on the right side of the dosing section.
Further, the feeding mechanism includes slide assemblies and is arranged on the right side of the second gear and and second gear
First worm screw of engaged transmission；The water tank bottom is equipped with L-type cavity, and the vertical cavity segment of the L-type cavity is arranged in level
The right side of cavity segment and the bottom of the water tank and the top of the ontology are extended downwardly through along the longitudinal direction；The Slide Group
Part includes the second upright slide block in the second horizontal slider and vertical cavity being mounted in the horizontal cavity of the L-type cavity,
And the right end of second horizontal slider and the upper end of the second upright slide block are slidably matched；The left end tail of second horizontal slider
Portion is fixed on the left side wall of the L-type cavity horizontal cavity section by spring, and is set in the left end of second horizontal slider
There is the second through hole penetrated through along the longitudinal direction；It is respectively equipped with and the in the two sides up and down of the horizontal cavity section of the L-type cavity
The corresponding second charging aperture of two through holes and the second feed pipe, second feed pipe extend downwardly and oblique along the longitudinal direction
Second tapping, first worm screw are equipped with the convex shoulder being slidably matched with second upright slide block lower end.Denitrating flue gas dress
The original state set, under the action of the spring, the second through hole and second charging aperture and second are fed second horizontal slider
Pipe shifts to install, and is stored in the raw material in water tank in water tank.
Further, second upright slide block is equipped with ear mount along the longitudinal direction, and the ear mount is overlapped on ontology and breaks vertically
On the convex shoulder being arranged in face, the convex shoulder plays the role of limit, prevents the second upright slide block from falling downwards along longitudinal direction.
Further, the air inlet pipe is connected with air inlet disk in the horizontal direction, and the air inlet disk includes and the air inlet pipe
The inlet manifold being connected, and the air intake branch being arranged on inlet manifold, compartment of terrain offers several on the air intake branch
The gas outlet of direction upward.
Further, described filler layer is mounted between the shower tray and the air inlet disk.
Further, the first aperture and the second aperture are offered at left and right sides of first supporting element respectively, described first
The position of aperture is corresponding with the first raw material interface position in the second gear, and second aperture is located proximate to ontology
At position, and the left-half of first supporting element is entity, the right side of first supporting element close to the first tapping
Dividing close to the second tapping is several skeletons being laterally arranged.
Further, second supporting element offers liquid outlet in the position close to first rotating shaft, close to first turn
Liquid outlet is set at axis, it is more uniform conducive to the reducing agent solution mixing in stirring section, and reducing agent solution is made to concentrate on spraying
Disk sprays downwards and Interaction Between Smoke after carrying out the distribution of liquid.
Further, heating coil is set in second supporting element, to heat the mixed liquor on the second supporting element, makes it
It is sprayed in packing layer after preheating.
Further, the shower tray fitting liquid outlet setting, so that reducing agent solution can rotated more uniformly
Shower tray on scatter, several spray apertures are also uniformly laid in the shower tray, it is molten to further increase reducing agent
The area coverage in denitration section of liquid improves treatment quantity and treatment effeciency.
Further, the planetary gear includes positioned at the sun gear of middle, the gear ring of outmost turns and being located at sun gear
Planetary gear between gear ring, the planetary gear are offered and the row on abrasive disk by the fixed relative position of abrasive disk
The correspondingly sized grinding feed inlet with position of star-wheel, the grinding dish external diameter is greater than the gear ring outer diameter, so that solid powder exists
Under the influence of centrifugal force from the central position along the first tooth after being ground between abrasive disk lower surface and first gear upper surface
It takes turns upper surface and flow to the first raw material interface and the first position of opening to outer ring.More accelerated by the urea solid powder after grinding
Fast, uniform dispersing and dissolving in water, and is conducive to the mass transfer that the reducing agent solution after grinding is more conducive to gas-liquid two-phase
Effect.
Further, the first charging aperture, the first through hole, the first feed pipe and the first discharge port is of same size.
Further, the spacing of the abrasive disk lower surface and the second gear upper surface is 1-20mm.
Further, the spacing of the abrasive disk lower surface and the second gear upper surface is less than first discharge port
Width.
Further, the upper surface of the second gear is solid surfaces.
Further, the shower tray is in a circular table shape, and making reducing agent solution along the inclined-plane of shower tray, flowing is spread around.
Beneficial effects of the present invention:
The present invention makes urea solid powder mull be broken into fine particle by the feeding mechanism in flue gas denitrification system, so
It is stirred and is uniformly mixed as reducing agent solution with water afterwards, which can be sufficiently inverse with the nitrogen oxides in flue gas
Stream contacts and carries out denitration reaction under the effect of the catalyst；While improving the mass transfer effect of gas-liquid two-phase again, also improve
The removal efficiency of nitrogen oxides in effluent；
Flue gas denitrification system stable and reliable operation employed in denitration method for flue gas of the present invention, occupied area is small, structure
It is compact, it is easy to operate, be conducive to large-scale promotion application.
Detailed description of the invention
Fig. 1 is the overall structure diagram of flue gas denitrification system of the present invention；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the partial enlarged view in Fig. 1 at B；
Fig. 4 is the structural schematic diagram of flue gas denitrification system air inlet disk of the present invention；
Fig. 5 is the top view of the first supporting element of flue gas denitrification system of the present invention；
Fig. 6 is the top view of the second supporting element of flue gas denitrification system of the present invention；
Fig. 7 is the top view of flue gas denitrification system planetary gear of the present invention；
Fig. 8 is the top view of flue gas denitrification system second gear of the present invention；
Fig. 9 is the top view of flue gas denitrification system abrasive disk of the present invention；
Wherein, 1, ontology, 2, air inlet pipe, 3, escape pipe, 4, outlet tube, 5, dosing tank, 6, water tank, 7, motor, 8, planet
Gear, 9, first gear, the 10, first worm screw, 11, dosing section, 12, stirring section, 13, denitration section, 21, air inlet disk, 52, first opens
Hole, 53, liquid outlet, 56, T-type cavity, the 57, second aperture, 65, L-type cavity, 71, first rotating shaft, 72, second gear, 73, stir
Mix paddle, 74, shower tray, 81, abrasive disk, the 101, first supporting element, the 102, second supporting element, 110, convex shoulder, 111, castor, 131,
Packing layer, 201, inlet manifold, 202, air intake branch, 203, gas outlet, 511, first charging aperture, the 512, first through hole,
513, the first feed pipe, the 514, first discharge port, 541, third gear, the 542, second shaft, 611, second charging aperture, 612,
Two through holes, the 613, second feed pipe, the 641, second upright slide block, the 642, second horizontal slider, 643, spring, 721, first is former
Expect interface, 812, gear ring, 813, planetary gear, 814, sun gear, 815, grinding feed inlet, the 911, second worm screw.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
As shown in Figures 1 to 9, a kind of flue-gas denitration process, comprising the following steps:
S1: urea solid powder mull is crushed to 100-300 mesh；
S2: mode of the urea with water by ultrasonic wave added stirring after grinding is uniformly mixed；
S3: it is carried out after above-mentioned mixed liquor is preheated to 100-300 DEG C by heater with the hot fume containing nitrogen oxides
Nitrogen oxides is reduced into nitrogen discharge under the effect of the catalyst by counter current contacting, and after the mixed liquor for not participating in reaction is collected
It recycles.
The flue gas denitrification system of denitrating flue gas processing, including ontology 1 and fixation are carried out using above-mentioned flue-gas denitration process
Air inlet pipe 2, escape pipe 3, outlet tube 4 and packing layer 131, the air inlet pipe 2 on ontology 1 are arranged close to the ontology 1
On the side wall of bottom, the outlet tube 4 is mounted on the bottom of the ontology 1, is also equipped with castor on 1 supporting leg of ontology
111,1 top of the ontology left and right sides is separately installed with dosing tank 5 and water tank 6, and top dead center position is equipped with motor 7,
1 inside of ontology is fixed with the first supporting element 101 close to top position, and the lower position of first supporting element 101 is fixed
There is the second supporting element 102, the escape pipe 3 is arranged close on 1 side wall of ontology of 102 lower position of the second supporting element；
7 lower end of motor is connected with first rotating shaft 71 along the longitudinal direction and extends to 102 lower position of the second supporting element, described
First rotating shaft 71 is successively fixed with planetary gear 8, second gear 72, agitating paddle 73 and shower tray 74, and the row from top to bottom
Star gear 8 and second gear 72 are located in the dosing section 11 being made of first supporting element 101 and ontology 1, the agitating paddle
73 are located in the stirring section 12 being made of first supporting element 101, the second supporting element 102 and ontology 1, the shower tray 74
In the denitration section 13 being made of second supporting element 102 and ontology 1, described filler layer 131 is mounted on the shower tray 74
Between air inlet pipe 2 transversely and horizontally face；5 bottom of dosing tank is equipped with T-type cavity 56, the vertical cavity of the T-type cavity 56
Section is arranged in the left side of horizontal cavity section and extends downwardly through bottom and the ontology 1 of the dosing tank 5 along the longitudinal direction
Top, while extending upwardly to 5 top inner wall of dosing tank along the longitudinal direction, installation in the horizontal cavity of the T-type cavity 56
There is third gear 541, the third gear 541 passes through the rotatable bottom water for being fixed on dosing tank 5 of the second shaft 542 out of the void
On chamber on lower wall, and the first through hole 512 penetrated through along the longitudinal direction is equipped on the third gear 541, it is empty in the T-type
The second worm screw 911 with 541 engaged transmission of third gear, second worm screw 911 are installed in the vertical cavity of chamber 56
Lower end be connected to be arranged in the left side of second gear 72 and at 9 center of first gear of 72 engaged transmission of second gear；Institute
The two sides up and down for stating the horizontal cavity section of T-type cavity 56 are respectively equipped with first charging aperture 511 corresponding with the first through hole 512
With the first feed pipe 513, first feed pipe 513 extend downwardly along the longitudinal direction and be arranged on planetary gear 813 first
Discharge port 514 is corresponding, and first discharge port 514 is along the longitudinal direction through planetary gear 813 and at center sun gear 814
Setting；The water tank 6 is sequentially connected by the feeding mechanism and second gear 72 for being mounted on 11 right side of dosing section.
The catalyst is with TiO2For carrier, with V2O5For active constituent, it is seated in packing layer 131 in honeycomb.
The feeding mechanism includes slide assemblies and setting on 72 right side of second gear and engages with second gear 72
First worm screw 10 of transmission；6 bottom of water tank is equipped with L-type cavity 65, and the vertical cavity segment of the L-type cavity 65 is arranged in water
The right side of flat cavity segment and the bottom of the water tank 6 and the top of the ontology 1 are extended downwardly through along the longitudinal direction；The cunning
Dynamic component includes second in the second horizontal slider 642 and vertical cavity being mounted in the horizontal cavity of the L-type cavity 65
Upright slide block 641, and the upper end of the right end of second horizontal slider 642 and the second upright slide block 641 is slidably matched；Described
The left end tail portion of two horizontal sliders 642 is fixed on the left side wall of the 65 horizontal cavity section of L-type cavity by spring 643, and
The second through hole 612 penetrated through along the longitudinal direction is equipped in the left end of second horizontal slider 642；In the L-type cavity 65
The two sides up and down of horizontal cavity section be respectively equipped with corresponding with the second through hole 612 second charging aperture 611 and the second charging
Pipe 613, second feed pipe 613 extends downwardly along the longitudinal direction and at oblique second aperture 57, on first worm screw 10
Equipped with the convex shoulder 110 being slidably matched with 641 lower end of the second upright slide block.
Second upright slide block 641 is equipped with ear mount along the longitudinal direction, and the ear mount is overlapped in the vertical section of ontology 1 and sets
On the convex shoulder set.
The air inlet pipe 2 is connected with air inlet disk 21 in the horizontal direction, and the air inlet disk 21 includes being connected with the air inlet pipe 2
Logical inlet manifold 201, and the air intake branch 202 being arranged on inlet manifold 201, compartment of terrain is opened on the air intake branch 202
Gas outlet 203 equipped with several directions upward.
First supporting element, 101 left and right sides offers the first aperture 52 and the second aperture 57 respectively, and described first opens
The position in hole 52 is corresponding with 721 position of the first raw material interface in the second gear 72, the position of second aperture 57
At 1 position of ontology, and the left-half of first supporting element 101 is entity at the first aperture 52, described first
The right half part of supporting element 101 is several skeletons being laterally arranged at the second aperture 57.
Second supporting element 102 offers liquid outlet 53 in the position close to first rotating shaft 71.Second supporting element
Heating coil is set in 102.
The shower tray 74 is bonded liquid outlet 53 and is arranged.
The width phase of the first charging aperture 511, the first through hole 512, the first feed pipe 513 and the first discharge port 514
Together.
The planetary gear 8 includes positioned at the sun gear 814 of middle, the gear ring 812 of outmost turns and being located at sun gear 814
Planetary gear 813 between gear ring 812, the planetary gear 813 are opened on abrasive disk 81 by the fixed relative position of abrasive disk 81
Equipped with the grinding feed inlet 815 with 514 corresponding position of the first discharge port, 81 outer diameter of abrasive disk is greater than the gear ring
812 outer diameters.
The spacing of 72 upper surface of 81 lower surface of abrasive disk and the second gear is 1-20mm.
It is wide that the spacing of 72 upper surface of 81 lower surface of abrasive disk and the second gear is less than first discharge port 514
Degree.
The upper surface of the second gear 72 is solid surfaces.
Working principle of the present invention is as follows:
Urea solid powder and water are housed in dosing tank 5 and water tank 6 respectively, starting motor 7 drives 71 turns of first rotating shaft
It is dynamic, and then sun gear 814 and second gear 72 is driven to rotate, the sun gear 814 drives planetary gear 813 to rotate, and then drives
Abrasive disk 81 rotates, and the second gear 72 engages first gear 9 and rotates, and successively drive the second worm screw 911 and with the second snail
The third turntable 541 of 911 engaged transmission of bar rotates, when the first through hole 512 and first charging aperture 511 on third turntable 541
When corresponding, urea solid powder passes sequentially through first charging aperture 511 and the first through hole 512 enters the first feed pipe 513,
When the first discharge port 514 in the movement of planetary gear 813 moves to corresponding with the first feed pipe 513, urea solid powder falls
It drops down between 72 upper surface of 81 lower surface of abrasive disk and the second gear, it is different by the relative rotation speed of the two, consolidate urea
Body powder, which is ground, is broken into the uniform tiny solid powder of particle, while under the influence of centrifugal force, the solid powder after grinding
End falls to stirring section 12 from the first aperture 52；Meanwhile 72 engaged transmission of second gear drives the first worm screw 9 rotation on right side,
It is jacked up in L-type cavity 65 upwards during by the convex shoulder 110 that is arranged on the first worm screw 9 in axial direction circular motion
Second upright slide block 641, the second upright slide block 641 push the second horizontal slider 642 to slide to the left during moving upwards, spring
643 are compressed, and so that the second through hole 612 and second charging aperture 611, the second feed pipe 613 is connected, to make in water tank 6
Raw material passes sequentially through the feeding work that second charging aperture 611, the second through hole 612 and the second feed pipe 613 complete liquid water, and
It is entered in stirring section 12 from the second aperture 57, by the movement of above-mentioned fill process, completes urea solid powder and liquid water
Charging；Urea solid powder and water in stirring section 12 obtain reducing agent solution after being uniformly mixed by agitating paddle 73,
By the heating coil being arranged in the second supporting element 102, by the second supporting element 102 of setting after preheating reducing agent solution
Liquid outlet 53 down along rotation the uniform cloth liquid of shower tray 74 and with the flue gas of 13 bottom of denitration section carry out gas-liquid two-phase it is inverse
Stream contact carries out the removing effect of nitrogen oxides under the effect of the catalyst, to complete denitration operation.Purified flue gas
It is discharged above denitration section 13, bag-type dust operation heel row is carried out after demister demisting, cooler are cooling into air, and
The reducing agent solution that 13 bottom of denitration section does not participate in reaction is recycled to stirring section 12 after collecting.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (5)
1. a kind of flue-gas denitration process, which comprises the following steps:
S1: urea solid powder mull is crushed to 100-300 mesh；
S2: mode of the urea with water by ultrasonic wave added stirring after grinding is uniformly mixed；
S3: adverse current is carried out with the hot fume containing nitrogen oxides after above-mentioned mixed liquor is preheated to 100-300 DEG C by heater
Nitrogen oxides is reduced into nitrogen discharge under the effect of the catalyst by contact, and the mixed liquor for not participating in reaction recycles after collecting
It utilizes.
2. a kind of flue gas denitrification system using flue-gas denitration process described in claim 1, which is characterized in that the flue gas is de-
Nitre system includes ontology and fixed air inlet pipe, escape pipe, outlet tube and packing layer on the body, and the air inlet pipe, which is mounted on, to be leaned on
On the side wall of the nearly body bottom portion, the outlet tube is mounted on the bottom of the ontology, is also pacified on the ontology supporting leg
Equipped with castor, it is separately installed with dosing tank and water tank at left and right sides of the ontology top, and top dead center position is equipped with motor,
The body interior is fixed with the first supporting element close to top position, and the lower position of first supporting element is fixed with second
Support member, the escape pipe are arranged close on this body sidewall of the second supporting element lower position；The motor lower end edge is vertical
First rotating shaft is connected with to direction and extends to the second supporting element lower position, and the first rotating shaft is successively solid from top to bottom
Surely there are planetary gear, second gear, agitating paddle and shower tray, and the planetary gear and second gear are located at by described first
In the dosing section that support member and ontology are constituted, the agitating paddle is located to be made of first supporting element, the second supporting element and ontology
Stirring section in, the shower tray is located in the denitration section that is made of second supporting element and ontology, described filler layer installation
Between the shower tray and air inlet pipe transversely and horizontally face；The dosing tank bottom is equipped with T-type cavity, and the T-type cavity erects
Straight cavity segment is arranged in the left side of horizontal cavity section and extends downwardly through the bottom of the dosing tank and described along the longitudinal direction
The top of ontology, while dosing tank top inner wall is extended upwardly to along the longitudinal direction, installation in the horizontal cavity of the T-type cavity
There is third gear, the third gear passes through lower wall on the rotatable bottom level cavity for being fixed on dosing tank of the second shaft
On, and the first through hole penetrated through along the longitudinal direction is equipped on the third gear, in the vertical cavity of the T-type cavity
The second worm screw with the third gear engaged transmission is installed, the lower end of second worm screw, which is connected to, to be arranged in second gear
Left side and with second gear engaged transmission first gear center at；In the two sides up and down of the horizontal cavity section of the T-type cavity
Be respectively equipped with first charging aperture corresponding with the first through hole and the first feed pipe, first feed pipe along the longitudinal direction to
It is lower extend simultaneously it is corresponding with the first discharge port being arranged on planetary gear, first discharge port run through along the longitudinal direction planetary gear and
It is arranged at the sun gear of center；The water tank is driven by the feeding mechanism and second gear being mounted on the right side of the dosing section
Connection.
3. flue gas denitrification system as claimed in claim 2, which is characterized in that the feeding mechanism includes slide assemblies and setting
The first worm screw on the right side of the second gear and with second gear engaged transmission；The water tank bottom is equipped with L-type cavity, described
The vertical cavity segment of L-type cavity is arranged in the right side of horizontal cavity section and extends downwardly through the bottom of the water tank along the longitudinal direction
The top in portion and the ontology；The slide assemblies include that the second level being mounted in the horizontal cavity of the L-type cavity is slided
The second upright slide block in block and vertical cavity, and the upper end of the right end of second horizontal slider and the second upright slide block is slided
Cooperation；The left end tail portion of second horizontal slider is fixed on the left side wall of the L-type cavity horizontal cavity section by spring,
And the second through hole penetrated through along the longitudinal direction is equipped in the left end of second horizontal slider；In the level of the L-type cavity
The two sides up and down of cavity segment are respectively equipped with second charging aperture corresponding with the second through hole and the second feed pipe, described second into
Expects pipe extends downwardly along the longitudinal direction and oblique second tapping, first worm screw be equipped with under second upright slide block
Hold the convex shoulder being slidably matched.
4. flue gas denitrification system as claimed in claim 2, which is characterized in that the air inlet pipe is connected with air inlet in the horizontal direction
Disk, the air inlet disk include the inlet manifold being connected with the air inlet pipe, and the air intake branch being arranged on inlet manifold, institute
It states compartment of terrain on air intake branch and offers the gas outlet of several directions upward.
5. flue gas denitrification system as claimed in claim 2, which is characterized in that opened up respectively at left and right sides of first supporting element
There are the first aperture and the second aperture, the position of first aperture is opposite with the first raw material interface position in the second gear
It answers, second aperture is located proximate at body position, and the left-half of first supporting element is close to the first tapping
For entity, the right half part of first supporting element is several skeletons being laterally arranged close to the second tapping.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113893683A (en) * | 2021-08-17 | 2022-01-07 | 华能重庆珞璜发电有限责任公司 | Full-load denitration system of subcritical coal-fired boiler |
| CN114452812A (en) * | 2021-12-28 | 2022-05-10 | 深圳华明环保科技有限公司 | Production process of solid-state denitration agent |
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|---|---|
| CN109675433B (en) | 2021-11-30 |
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Denomination of invention: A flue gas denitrification process Effective date of registration: 20230619 Granted publication date: 20211130 Pledgee: Shandong Guangrao Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG DY NEW MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2023980044381 |
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