CN110585874A - Sintering flue gas desulfurization and denitrification device - Google Patents
Sintering flue gas desulfurization and denitrification device Download PDFInfo
- Publication number
- CN110585874A CN110585874A CN201910973482.1A CN201910973482A CN110585874A CN 110585874 A CN110585874 A CN 110585874A CN 201910973482 A CN201910973482 A CN 201910973482A CN 110585874 A CN110585874 A CN 110585874A
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- desulfurization
- liquid
- tower body
- gas
- denitrification
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 139
- 230000023556 desulfurization Effects 0.000 title claims abstract description 138
- 239000003546 flue gas Substances 0.000 title claims abstract description 81
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000005245 sintering Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 166
- 239000007789 gas Substances 0.000 claims abstract description 105
- 238000009826 distribution Methods 0.000 claims abstract description 92
- 238000010521 absorption reaction Methods 0.000 claims abstract description 63
- 238000001914 filtration Methods 0.000 claims abstract description 47
- 239000007921 spray Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- 239000000428 dust Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 abstract description 6
- 239000011593 sulfur Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000000449 nitro group Chemical class [O-][N+](*)=O 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002912 waste gas 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/74—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
- 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
- B01D2251/104—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (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)
- Dispersion Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a sintering flue gas desulfurization and denitrification device, which comprises an oxidation device, a dust removal device, an air inlet pipeline, a desulfurization device, a gas transmission pipeline and a denitrification device, which are sequentially arranged along the direction of air flow; the desulfurization device comprises a desulfurization tower body, an inclined plate filtering assembly arranged inside the desulfurization tower body, a desulfurization spraying assembly used for supplying absorption liquid into the desulfurization tower body and a gas distribution assembly used for conveying flue gas entering from a gas inlet pipeline into the desulfurization tower body; denitration device includes the denitration tower body and sets up the denitration spray assembly in the inside denitration tower body. According to the invention, the sintering flue gas is sequentially subjected to desulfurization and denitrification treatment through the desulfurization device and the denitrification device, so that the flue gas can reach the emission standard; according to the invention, the inclined plate filter assembly is arranged to filter the flue gas, and the inclined filter plate is used as a carrier of the absorption liquid, so that the contact probability and the contact time of the flue gas and the absorption liquid can be greatly improved, the absorption liquid is ensured to fully absorb sulfur-containing substances in the flue gas, and the desulfurization effect is improved.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a sintering flue gas desulfurization and denitrification device.
Background
A large amount of sintering flue gas can be generated in the production process of the steel industry, and a large amount of SO exists in the sintering flue gas2、SO3、NOXPollutants are a great air pollution source and can be discharged only through desulfurization and denitrification treatment. The existing sintering flue gas desulfurization and denitration treatment process mainly comprises a wet process and a dry process, wherein the wet process has the characteristics of high reaction speed, high efficiency and the like, is generally applied and generally oxidizes flue gas (mainly oxidizes NO into NO)2) Then, the absorption liquid is utilized to carry out desulfurization and denitration, and the absorption liquid and the gas are sprayed in a countercurrent manner to absorb SO in the flue gas2、SO3、NOX. Whether the contact of absorption liquid and flue gas is abundant influences desulfurization effect very much, but among the prior art, through simple spraying, there is the insufficient problem of contact of absorption liquid and flue gas, leads to the flue gas treatment effect not good easily, or absorption liquid consumption too much scheduling problem. Therefore, a more reliable solution is now needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sintering flue gas desulfurization and denitrification device aiming at the defects in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a sintering flue gas desulfurization and denitrification device comprises an oxidation device, a dust removal device, an air inlet pipeline, a desulfurization device, a gas transmission pipeline and a denitrification device which are sequentially arranged along the direction of air flow;
the desulfurization device comprises a desulfurization tower body, an inclined plate filtering assembly arranged in the desulfurization tower body, a desulfurization spraying assembly used for supplying absorption liquid into the desulfurization tower body, and a gas distribution assembly used for conveying flue gas entering from the gas inlet pipeline into the desulfurization tower body;
the inclined plate filtering assembly comprises a plurality of filtering inclined plates which are arranged on the inner wall of the desulfurization tower body in a staggered mode, one end of each filtering inclined plate is connected with the inner wall of the desulfurization tower body, and the other end of each filtering inclined plate inclines towards the bottom of the desulfurization tower body; the filter sloping plate is provided with a densely arranged microporous structure penetrating through the filter sloping plate body so as to allow smoke to pass through;
denitration device includes the denitration tower body and sets up denitration spray assembly inside the denitration tower body.
Preferably, the denitration spray assembly comprises a denitration liquid supply pipeline, a denitration liquid supply pump arranged on the denitration liquid supply pipeline and a denitration spray header which is communicated with the outlet end of the denitration liquid supply pipeline and is arranged at the upper end inside the denitration tower body.
Preferably, a desulfurization tower exhaust port is formed in the top of the desulfurization tower body, a denitration tower air inlet is formed in the side portion of the bottom end of the denitration tower body, a denitration tower exhaust port is formed in the top of the denitration tower body, the desulfurization tower exhaust port and the denitration tower air inlet are communicated through the gas transmission pipeline, and the gas transmission pipeline is provided with a gas transmission fan.
Preferably, the upper surface of the filtering inclined plate facing the top of the desulfurization tower body is provided with a liquid inlet hole and a liquid guide groove communicated with the liquid inlet hole;
the liquid guide groove comprises a liquid distribution groove section and a liquid guide groove section, the liquid distribution groove section is of a tree-shaped branched structure, a liquid inlet end on the upper portion of the liquid distribution groove section is communicated with the liquid inlet hole, tree-shaped branches on the lower portion of the liquid distribution groove section form a plurality of branches, and a liquid outlet end of each branch is communicated with one of the liquid guide groove sections.
Preferably, one end of the filtering inclined plate, which is connected with the inner wall of the desulfurization tower body, is provided with an arc-shaped end edge, a connecting block is fixedly connected to the arc-shaped end edge, and the connecting block is provided with a connecting hole.
Preferably, the inner wall of the desulfurization tower body is fixedly connected with an installation block, the installation block is provided with an installation groove for inserting the connection block, the installation block is also provided with an insertion hole, and a pin shaft penetrating through the connection hole is inserted in the insertion hole;
still the rigid coupling has telescopic support pole on the inner wall of desulfurization tower body, telescopic support pole's the other end with filter the middle part rotatable coupling of swash plate.
Preferably, desulfurization spray assembly include the transfer line, with the transfer line intercommunication and setting are in desulfurization shower head, with a plurality of cloth liquid pipes of transfer line intercommunication and connection of the inside upper end of desulfurization tower body are in the dripper of the exit end of cloth liquid pipe, every the top in the feed liquor hole of filtering the swash plate all corresponds and is provided with one the dripper.
Preferably, the gas distribution assembly comprises a gas distribution main pipe communicated with the gas inlet pipeline, a first gas distribution pipe and a second gas distribution pipe which are communicated with the gas distribution main pipe, a transition pipe head communicated with the gas outlet end of the second gas distribution pipe, a cone gas distribution cylinder communicated with the upper end of the transition pipe head, and a liquid guide box communicated with the lower end of the transition pipe head;
the bottom of the liquid guiding box is provided with a plurality of liquid outlet holes, and the lower end of the adapter is communicated with the inside of the liquid guiding box through a necking pipe.
Preferably, the second air distribution pipe is provided with a liquid blocking pipe section, and the liquid blocking pipe section is an inverted-V-shaped pipe section which is arranged in the middle of the second air distribution pipe and protrudes upwards.
Preferably, the circular opening at the lower part of the cone gas distribution cylinder is smaller than the circular opening at the upper part of the cone gas distribution cylinder, the outlet end of the first gas distribution pipe is communicated to the side part of the circular opening at the upper part of the cone gas distribution cylinder, and the outlet end of the first gas distribution pipe is arranged along the tangential direction of the periphery of the circular opening at the upper part.
It is preferable that the first and second liquid crystal layers are formed of,
the invention has the beneficial effects that:
according to the sintering flue gas desulfurization and denitrification device, the sintering flue gas is sequentially subjected to desulfurization and denitrification treatment through the desulfurization device and the denitrification device, so that the flue gas can reach the emission standard;
according to the invention, the inclined plate filter assembly is arranged to filter the flue gas, and the inclined filter plate is used as a carrier of the absorption liquid, so that the contact probability and the contact time of the flue gas and the absorption liquid can be greatly improved, the absorption liquid is ensured to fully absorb sulfur-containing substances in the flue gas, and the desulfurization effect is improved; wherein, a plurality of absorption liquid runoffs are formed on the filtering sloping plate through the liquid guide groove, so that the filtering sloping plate body is fully absorbed with the absorption liquid; the smoke flows from bottom to top, part of the smoke sequentially passes through the filtering inclined plates, and the other part of the smoke flows upwards through a tortuous channel formed in the middle of the filtering inclined plates; the absorption liquid dripped by the desulfurization spray header flows downwards along the zigzag channel on each filter inclined plate from top to bottom under the flow guide effect of the filter inclined plates and is fully contacted with the zigzag rising flue gas, so that the contact probability and the contact time of the flue gas and the absorption liquid are greatly improved, the desulfurization effect of the absorption liquid can be improved, the utilization rate of the absorption liquid can be improved, and the consumption of the absorption liquid is reduced;
according to the invention, the gas distribution assembly is arranged, and two airflows in the vertical upward and lateral directions are introduced to form the spirally-ascending flue gas airflow in the desulfurization tower body, so that the collision contact probability and strength of the falling absorption liquid in the flue gas ascending process can be greatly improved, and the absorption effect of the absorption liquid on sulfur-containing substances in the flue gas is improved.
Drawings
FIG. 1 is a schematic structural diagram of a sintering flue gas desulfurization and denitrification apparatus according to the present invention;
FIG. 2 is a schematic view of the desulfurization apparatus of the present invention;
FIG. 3 is a schematic cross-sectional view of the inclined filter plate according to the present invention;
FIG. 4 is a cross-sectional structural view of the mounting block of the present invention;
FIG. 5 is a schematic structural view of the filter sloping plate of the present invention mounted on the mounting block;
FIG. 6 is a schematic structural view of an air distribution assembly of the present invention;
fig. 7 is a schematic structural view of the first gas distribution pipe and the cone gas distribution cylinder of the present invention.
Description of reference numerals:
1-an oxidation unit;
2-a dust removal device;
3-an air inlet duct; 30-an air inlet fan;
4-a desulfurization unit; 40-a desulfurization tower body; 41-inclined plate filter component; 42-a desulfurization spray assembly; 43-gas distribution assembly;
400-mounting block; 401-mounting groove; 402-a jack; 403-pin shaft; 404-telescopic support rod; 405-desulfurization tower exhaust port; 406 — desulfurization waste discharge;
410-filtering inclined plate; 411-liquid inlet hole; 412-a liquid guide groove; 413-liquid distribution groove section; 414-drainage channel section; 415-substream; 416-curved end edges; 417 — connecting block; 418-connecting hole;
420-an infusion tube; 421-a desulfurization spray header; 422-liquid distribution pipe; 423-dripper;
430-gas distribution manifold; 431-a first gas distribution pipe; 432-second gas distribution pipe; 433-a transfer pipe head; 434-cone gas cylinder; 435-liquid guiding box; 436-reducing pipe; 437-inverted V-shaped pipe section; 438 — a first solenoid valve; 439-second solenoid valve; 4340-lower circular opening; 4341-upper circular opening.
5, a gas pipeline; 50-air conveying fan;
6-a denitration device; 60-a denitration tower body; 61-a denitration spray assembly; 62-denitration liquid supply pipeline; 63-denitration liquid supply pump; 64-a denitration spray header; 65-inlet of the denitrating tower; 66-denitration tower exhaust port; 67-denitration waste discharge.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
As shown in fig. 1, the sintering flue gas desulfurization and denitrification apparatus 6 of the present embodiment includes an oxidation apparatus 1, a dust removal apparatus 2, a gas distribution header 430, a desulfurization apparatus 4, a gas transmission pipeline 5, and a denitrification apparatus 6, which are sequentially arranged along an air flow direction;
the desulfurization device 4 comprises a desulfurization tower body 40, an inclined plate filtering assembly 41 arranged inside the desulfurization tower body 40, a desulfurization spraying assembly 42 used for supplying absorption liquid into the desulfurization tower body 40, and a gas distribution assembly 43 used for conveying flue gas entering from a gas distribution main pipe 430 into the desulfurization tower body 40;
the inclined plate filtering component 41 comprises a plurality of filtering inclined plates 410 which are arranged on the inner wall of the desulfurization tower body 40 in a staggered manner, one end of each filtering inclined plate 410 is connected with the inner wall of the desulfurization tower body 40, and the other end of each filtering inclined plate is inclined towards the bottom direction of the desulfurization tower body 40; the filter sloping plate 410 is provided with a densely arranged microporous structure penetrating through the body thereof for smoke to pass through;
denitration device 6 includes denitration tower body 60 and sets up the inside denitration spray assembly 61 of denitration tower body 60.
The denitration spray assembly 61 comprises a denitration liquid supply pipeline 62, a denitration liquid supply pump 63 arranged on the denitration liquid supply pipeline 62 and a denitration spray header 64 which is communicated with the outlet end of the denitration liquid supply pipeline 62 and is arranged at the upper end inside the denitration tower body 60.
The flue gas gets into desulfurization tower body 40 through gas distribution manifold 430, is provided with air intake fan 30 on the gas distribution manifold 430, and desulfurization tower gas vent 405 has been seted up at the top of desulfurization tower body 40, and its bottom still is provided with desulfurization waste discharge port 406 for discharge desulfurization waste.
Denitration tower air inlet 65 has been seted up to the bottom lateral part of denitration tower body 60, and denitration tower gas vent 66 has been seted up at the top of denitration tower body 60, through gas transmission pipeline 5 intercommunication between desulfurization tower gas vent 405 and the denitration tower air inlet 65, is provided with gas transmission fan 50 on the gas transmission pipeline 5. The bottom of denitration tower body 60 still is provided with denitration waste discharge port 67 for discharge denitration waste material.
The sintering flue gas desulfurization and denitrification device 6 is arranged at the outlet end of a sintering flue gas exhaust system and is used for performing desulfurization and denitrification treatment on sintering flue gas, such as sintering flue gas discharged by a steel plant. The sintering flue gas sequentially passes through the oxidation device 1 and the dust removal device 2 (a conventional bag type dust remover can be selected), then enters the denitration tower body 60 through the gas distribution header pipe 430, and contacts with the desulfurization absorption liquid in the desulfurization tower body 40 for desulfurization; the desulfurized gas enters the denitration tower body 60 through the gas transmission pipeline 5, contacts with the denitration absorption liquid in the denitration tower body 60 to be denitrated, and is finally discharged through the desulfurization tower exhaust port 405.
Wherein, the oxidation device 1 oxidizes NO in the flue gas into NO by strong oxidant (such as ozone or hydrogen peroxide)2To be taken off subsequentlyRemoval of NO in Nitro plant 62The oxidation apparatus 1 may be selected from conventional apparatuses, and the ozone oxidation apparatus 1 is selected in the present embodiment.
The absorption liquid in the desulfurization tower body 40 can be selected from conventional desulfurization absorption liquid, and in a preferred embodiment, calcium hydroxide slurry is selected, and the calcium hydroxide slurry can not only remove SO2、SO3，At the same time, can remove NO2And has desulfurization and denitration effects, so that the load of the subsequent denitration device 6 is greatly reduced.
Wherein, the absorption liquid of the denitration tower body 60 can be selected from conventional denitration absorption liquid, such as alkaline solution (ammonia water), sulfite slurry and the like.
Example 2
In this embodiment, referring to fig. 2 to 5, an end of the inclined filter plate 410 connected to the inner wall of the desulfurization tower body 40 has an arc-shaped end edge 416, the arc-shaped end edge 416 is fixedly connected to a connecting block 417, and the connecting block 417 is provided with a connecting hole 418. The inner wall of the desulfurization tower body 40 is fixedly connected with an installation block 400, the installation block 400 is provided with an installation groove 401 for inserting the connection block 417, the installation block 400 is also provided with an insertion hole 402, and a pin shaft 403 penetrating through the connection hole 418 is inserted into the insertion hole 402; the inner wall of the desulfurization tower body 40 is further fixedly connected with a telescopic support rod 404, the other end of the telescopic support rod 404 is rotatably connected with the middle part of the filtering sloping plate 410, the telescopic support rod 404 is of an existing conventional telescopic rod structure, and is provided with a locking mechanism which can be locked after telescopic adjustment. In this embodiment, the inclined filtering plate 410 is rotatably connected to the inner wall of the desulfurization tower body 40, specifically: the connecting block 417 is inserted into the mounting groove 401, then the pin 403 passes through the insertion hole 402 and the connecting hole 418 on the connecting block 417 and is fixed in the mounting block 400, and the connecting block 417 can rotate around the pin 403 through the connecting hole 418, so that the rotatable connection is realized, and the inclination angle of the filtering inclined plate 410 can be adjusted; then, the filter inclined plate 410 is supported by the rotatable connection between the telescopic strut 404 fixedly connected to the inner wall of the desulfurization tower body 40 and the middle part of the filter inclined plate 410, so that the filter inclined plate 410 with the installation angle adjusted is kept fixed. When the initial installation, open the apron on desulfurization tower body 40 upper portion, filter the swash plate 410 and connect the back on installation piece 400 through connecting block 417, then adjust the length of telescopic strut 404 to the inclination of having adjusted filter swash plate 410, then fixed telescopic strut 404, thereby make filter swash plate 410 fixed, from supreme each filter swash plate 410 of installing in proper order down. In a preferred embodiment, the length of the inclined filter plate 410 is greater than the radius of the desulfurization tower body 40, and the lower end of the inclined filter plate 410 passes through the central axis of the desulfurization tower body 40, that is, the projection length of the inclined filter plate 410 in the horizontal plane is greater than the radius of the desulfurization tower body 40, so that the inclined filter plate 410 can be bent and raised to improve the desulfurization effect.
Wherein, the inclined filtering plate 410 has a porous structure, and the smoke can pass through. The inclined filtering plate 410 may be made of carbon fiber and has a porous structure, i.e., has good corrosion resistance and high mechanical strength. The inclined filtering plate 410 has a certain filtering and purifying effect on the smoke.
Wherein, the upper surface of the filtering sloping plate 410 facing the top of the desulfurization tower body 40 is provided with a liquid inlet hole 411 and a liquid guide groove 412 communicated with the liquid inlet hole 411; the liquid guiding groove 412 comprises a liquid distribution groove section 413 and a liquid guiding groove section 414, the liquid distribution groove section 413 is of a tree-shaped branched structure, a liquid inlet end at the upper part of the liquid distribution groove section is communicated with the liquid inlet hole 411, a plurality of branches 415 are formed by tree-shaped branches at the lower part of the liquid distribution groove section, and a liquid outlet end of each branch 415 is communicated with one liquid guiding groove section 414. The desulfurization spraying component 42 comprises a liquid conveying pipe 420, a desulfurization spraying head 421 communicated with the liquid conveying pipe 420 and arranged at the upper end of the inside of the desulfurization tower body 40, a plurality of liquid distribution pipes 422 communicated with the liquid conveying pipe 420 and drippers 423 connected to the outlet ends of the liquid distribution pipes 422, and one dripper 423 is correspondingly arranged above the liquid inlet hole 411 of each filtering inclined plate 410. Through setting up dripper 423, in the desulfurization process, make the absorption liquid incessant drip into feed liquor hole 411, guarantee to filter that swash plate 410 is inside to be inhaled full of absorption liquid.
The absorption liquid is conveyed to the liquid conveying pipe 420 through a pump, and a part of the absorption liquid enters the desulfurization spray header 421 so as to be sprayed from top to bottom to be contacted with the flue gas to absorb sulfur-containing substances; the other part of the flue gas is dripped into the liquid inlet hole 411 of the filtering inclined plate 410 through the liquid distribution pipe 422 and the dripper 423, so that the filtering inclined plate 410 is filled with absorption liquid, and the flue gas is fully contacted with the absorption liquid when passing through the filtering inclined plate 410 to remove sulfur-containing substances. Wherein, after the absorption liquid dripped by the dripper 423 falls into the liquid inlet hole 411, the absorption liquid is distributed to each drainage groove communicated with the liquid inlet hole through the liquid distribution groove segment 413 with the tree-shaped branched structure, and then falls onto the filtering inclined plate 410 of the next layer. Form a plurality of absorption liquid runoff on filtering swash plate 410 through liquid guide groove 412, make filtering swash plate 410 body absorb full absorption liquid, the flue gas passes filtering swash plate 410 by the bottom, or when the space through filtering swash plate 410 middle part was above-mentioned, flue gas and absorption liquid fully contact and guarantee the effect of gettering of containing sulphur material in the flue gas to can improve the utilization ratio of absorption liquid, reduce the consumption of absorption liquid.
The smoke flows from bottom to top, part of the smoke sequentially passes through the filtering inclined plates 410, and the other part of the smoke flows upwards through the tortuous channels formed in the middle of the filtering inclined plates 410; the absorption liquid dropped into the desulfurization spray header 421 flows downwards along the zigzag channel on each filter inclined plate 410 from top to bottom under the flow guiding effect of the filter inclined plates 410, and is fully contacted with the zigzag rising flue gas, so that the contact probability and the contact time of the flue gas and the absorption liquid are greatly improved, and the desulfurization effect of the absorption liquid can be improved. Through the setting of above-mentioned structure to filter swash plate 410 and be the carrier of absorption liquid, can improve the contact probability and the contact time of flue gas and absorption liquid greatly, guarantee that the absorption liquid fully absorbs the sulphur material in the flue gas, improve desulfurization effect.
On the other hand, the inclination angle of the inclined filtering plate 410 can be adjusted, and the flue gas treatment capacity and the desulfurization effect can be adjusted to a certain extent. For example, by properly adjusting the inclination angle of the inclined filter plate 410 to be smaller, the size of the tortuous passage formed in the middle of the inclined filter plate 410 can be increased, thereby increasing the flue gas treatment capacity; and when the size of the tortuous passage is reduced, the desulfurization effect can be relatively improved.
Example 3
In this embodiment, referring to fig. 6 to 7, the gas distribution assembly 43 includes a first gas distribution pipe 431 and a second gas distribution pipe 432 both communicated with the gas distribution manifold 430 communicated with the gas inlet pipeline 3 and the gas distribution manifold 430, a conical gas distribution pipe 434 communicated with an adapter pipe head 433 communicated with the gas outlet end of the second gas distribution pipe 432 and the upper end of the adapter pipe head 433, and a liquid guide box 435 communicated with the lower end of the adapter pipe head 433; a plurality of liquid outlet holes are formed in the bottom of the liquid guiding box 435, and the lower end of the adapter tube head 433 is communicated with the inside of the liquid guiding box 435 through a necking tube 436. The second gas distribution pipe 432 is provided with a liquid blocking pipe section which is an inverted V-shaped pipe section 437 which is arranged in the middle of the second gas distribution pipe 432 and protrudes upwards. The lower circular opening 4340 of the cone gas distribution cylinder 434 is smaller than the upper circular opening 4341 thereof, the outlet end of the first gas distribution pipe 431 is communicated to the side part of the upper circular opening 4341 of the cone gas distribution cylinder 434, and the outlet end of the first gas distribution pipe 431 is arranged along the tangential direction of the periphery of the upper circular opening 4341.
One part of the flue gas entering the desulfurization tower body 40 is communicated to the lower part of the conical gas distribution cylinder 434 through the second gas distribution pipe 432 so as to flow upwards, the other part of the flue gas is communicated to the upper side of the conical gas distribution cylinder 434 through the first gas distribution pipe 431 and is arranged along the tangential direction of the periphery of the upper circular opening 4341, the air flow direction of the flue gas is a circular direction in the horizontal plane, and after the two air flows are converged, the whole air inlet direction is spirally raised in the desulfurization tower body 40. On one hand, the collision contact probability and strength of the falling absorption liquid in the rising process of the flue gas can be greatly improved, and the absorption effect of the absorption liquid on sulfur-containing substances in the flue gas is improved; on the other hand, the spiral filter plate 410 can be matched with the arrangement structure of the filter plates 410, the filter plates 410 are integrally spiral in the desulfurization tower body 40, the spirally rising airflow direction is favorable for uniform distribution of flue gas, the whole filter plates 410 can be fully utilized, all parts of the whole filter plates 410 of the flue gas can pass through, the speed of the flue gas passing through the filter plates 410 is improved, and therefore the flue gas treatment efficiency can be greatly improved; and the filter sloping plate 410 is fully filled with absorption liquid, and the flue gas fully contacts with the absorption liquid after passing through, thereby greatly improving the desulfurization effect of the flue gas. Furthermore, the first air distribution pipe 431 and the second air distribution pipe 432 are respectively provided with a first electromagnetic valve 438 and a second electromagnetic valve 439, and the air inflow of the two air distribution pipes can be controlled through the electromagnetic valves.
The absorption liquid flows down along the side wall of the cone gas cylinder 434 and enters the liquid guide box 435, and the absorption liquid and the ascending gas flow are in reverse contact in the process, but the absorption liquid does not influence the smooth entering of the smoke.
The conical gas distribution cylinder 434 is arranged to uniformly guide the entering gas to the lower part of the box filter at the bottommost part in the desulfurization tower body 40, so that the gas ascending through the lower circular opening 4340 and the gas entering through the first gas distribution pipe 431 at the side part form a spiral gas flow. The falling absorption liquid enters the liquid guiding box 435 after passing through the cone gas distributing cylinder 434 and the adapter tube head 433, and is discharged from a liquid outlet at the bottom of the liquid guiding box 435, and finally can be discharged from a waste liquid outlet at the bottom of the desulfurization tower body 40. Wherein, in the round opening 4340 of lower part of adapter tube head 433 and cone gas barrel 434, the flue gas that the bottom got into contacts with the absorption liquid that falls for the first time, can carry out preliminary processing to the flue gas. The arrangement of the necking pipe 436 at the lower part of the adapter pipe head 433 can greatly reduce the direct downward flow of the flue gas entering the second gas distribution pipe 432 to the liquid guide box 435. In addition, as the liquid outlet at the bottom of the liquid guiding box 435 is not filled with the absorption liquid and flows out, the lower part of the adapter tube head 433 is provided with the reducing tube 436, and the upper part of the adapter tube head 433 is opened, the flue gas entering from the second gas distribution tube 432 basically flows upwards and enters the box-type filter. Wherein, through set up the bellied type of falling V section 437 of upwards in second gas distribution pipe 432 middle part, can prevent that the absorption liquid that gets into switching tube head 433 from splashing into second gas distribution pipe 432 back, to the air inlet direction flow of second gas distribution pipe 432, can effectively prevent the absorption liquid to get into the section of admitting air of second gas distribution pipe 432 to avoid influencing the input of flue gas. In the above embodiment, the desulfurization device 4 and the denitration device 6 are both made of corrosion-resistant conventional materials, or corrosion-resistant films are arranged on the surfaces of the components, so that the service life is prolonged.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. A sintering flue gas desulfurization and denitrification device is characterized by comprising an oxidation device, a dust removal device, an air inlet pipeline, a desulfurization device, a gas transmission pipeline and a denitrification device which are sequentially arranged along the direction of gas flow;
the desulfurization device comprises a desulfurization tower body, an inclined plate filtering assembly arranged in the desulfurization tower body, a desulfurization spraying assembly used for supplying absorption liquid into the desulfurization tower body, and a gas distribution assembly used for conveying flue gas entering from the gas inlet pipeline into the desulfurization tower body;
the inclined plate filtering assembly comprises a plurality of filtering inclined plates which are arranged on the inner wall of the desulfurization tower body in a staggered mode, one end of each filtering inclined plate is connected with the inner wall of the desulfurization tower body, and the other end of each filtering inclined plate inclines towards the bottom of the desulfurization tower body; the filter sloping plate is provided with a densely arranged microporous structure penetrating through the filter sloping plate body so as to allow smoke to pass through;
denitration device includes the denitration tower body and sets up denitration spray assembly inside the denitration tower body.
2. The sintering flue gas desulfurization and denitrification device according to claim 1, wherein the denitrification spray assembly comprises a denitrification liquid supply pipeline, a denitrification liquid supply pump arranged on the denitrification liquid supply pipeline, and a denitrification spray header arranged at the upper end inside the denitrification tower body and communicated with the outlet end of the denitrification liquid supply pipeline.
3. The desulfurization and denitrification device for sintering flue gas as recited in claim 2, wherein a desulfurization tower exhaust port is formed in the top of the desulfurization tower body, a denitrification tower air inlet is formed in the side portion of the bottom end of the denitrification tower body, a denitrification tower exhaust port is formed in the top of the denitrification tower body, the desulfurization tower exhaust port is communicated with the denitrification tower air inlet through the gas transmission pipeline, and the gas transmission pipeline is provided with a gas transmission fan.
4. The desulfurization and denitrification device for the sintered flue gas as recited in claim 1, wherein a liquid inlet hole and a liquid guide groove communicated with the liquid inlet hole are formed in the upper surface of the inclined filtering plate facing the top of the desulfurization tower body;
the liquid guide groove comprises a liquid distribution groove section and a liquid guide groove section, the liquid distribution groove section is of a tree-shaped branched structure, a liquid inlet end on the upper portion of the liquid distribution groove section is communicated with the liquid inlet hole, tree-shaped branches on the lower portion of the liquid distribution groove section form a plurality of branches, and a liquid outlet end of each branch is communicated with one of the liquid guide groove sections.
5. The desulfurization and denitrification device for sintered flue gas as claimed in claim 4, wherein one end of the inclined filtering plate, which is connected with the inner wall of the desulfurization tower body, is provided with an arc-shaped end edge, a connecting block is fixedly connected to the arc-shaped end edge, and the connecting block is provided with a connecting hole.
6. The desulfurization and denitrification device for sintered flue gas as claimed in claim 5, wherein an installation block is fixedly connected to the inner wall of the desulfurization tower body, an installation groove for inserting the connection block is formed in the installation block, an insertion hole is further formed in the installation block, and a pin shaft penetrating through the connection hole is inserted in the insertion hole;
still the rigid coupling has telescopic support pole on the inner wall of desulfurization tower body, telescopic support pole's the other end with filter the middle part rotatable coupling of swash plate.
7. The desulfurization and denitrification device for sintering flue gas as recited in claim 6, wherein the desulfurization spray assembly comprises a liquid conveying pipe, a desulfurization spray header communicated with the liquid conveying pipe and arranged at the upper end of the inside of the desulfurization tower body, a plurality of liquid distribution pipes communicated with the liquid conveying pipe, and a water dropper connected to the outlet end of the liquid distribution pipes, wherein one water dropper is correspondingly arranged above the liquid inlet hole of each filtering inclined plate.
8. The desulfurization and denitrification device for the sintering flue gas as recited in claim 1, wherein the gas distribution assembly comprises a gas distribution main pipe communicated with the gas inlet pipeline, a first gas distribution pipe and a second gas distribution pipe communicated with the gas distribution main pipe, a conical gas distribution cylinder communicated with a transition pipe head communicated with a gas outlet end of the second gas distribution pipe and communicated with an upper end of the transition pipe head, and a liquid guide box communicated with a lower end of the transition pipe head;
the bottom of the liquid guiding box is provided with a plurality of liquid outlet holes, and the lower end of the adapter is communicated with the inside of the liquid guiding box through a necking pipe.
9. The desulfurization and denitrification device for the sintering flue gas as recited in claim 8, wherein the second gas distribution pipe is provided with a liquid blocking pipe section, and the liquid blocking pipe section is an inverted V-shaped pipe section which is arranged in the middle of the second gas distribution pipe and protrudes upwards.
10. The desulfurization and denitrification facility for sintered flue gas according to claim 9, wherein the circular opening at the lower part of the conical gas distribution cylinder is smaller than the circular opening at the upper part thereof, the outlet end of the first gas distribution pipe is communicated to the side part of the circular opening at the upper part of the conical gas distribution cylinder, and the outlet end of the first gas distribution pipe is arranged along the tangential direction of the periphery of the circular opening at the upper part.
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| CN111073706A (en) * | 2020-01-06 | 2020-04-28 | 浙江科技学院 | Domestic waste gasification treatment system with chlorine removal function |
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