CN113797734A - Device and method for treating flue gas - Google Patents
Device and method for treating flue gas Download PDFInfo
- Publication number
- CN113797734A CN113797734A CN202111161734.4A CN202111161734A CN113797734A CN 113797734 A CN113797734 A CN 113797734A CN 202111161734 A CN202111161734 A CN 202111161734A CN 113797734 A CN113797734 A CN 113797734A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- outlet
- desulfurization
- desulfurizer
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 35
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 29
- 230000023556 desulfurization Effects 0.000 claims abstract description 29
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 17
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 10
- 230000029087 digestion Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 32
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 239000000920 calcium hydroxide Substances 0.000 claims description 13
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 13
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 13
- 239000000292 calcium oxide Substances 0.000 claims description 11
- 235000012255 calcium oxide Nutrition 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 8
- 229910052602 gypsum Inorganic materials 0.000 claims description 8
- 239000010440 gypsum Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 235000017550 sodium carbonate Nutrition 0.000 claims description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 7
- 239000007790 solid phase Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 3
- 239000000809 air pollutant Substances 0.000 abstract description 2
- 231100001243 air pollutant Toxicity 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- DCRGHMJXEBSRQG-UHFFFAOYSA-N 1-[1-(cyclooctylmethyl)-5-(hydroxymethyl)-3,6-dihydro-2H-pyridin-4-yl]-3-ethyl-2-benzimidazolone Chemical compound O=C1N(CC)C2=CC=CC=C2N1C(CC1)=C(CO)CN1CC1CCCCCCC1 DCRGHMJXEBSRQG-UHFFFAOYSA-N 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
Images
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
- B01D53/77—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
- B01D53/346—Controlling the process
-
- 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
- B01D53/48—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
- B01D53/504—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 device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- 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)
- 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)
- Treating Waste Gases (AREA)
Abstract
The device and the method for treating the flue gas comprise desulfurizer preparation, desulfurization, dust removal and demisting, wherein the desulfurizer preparation comprises a desulfurizer storage bin, a digester and a digestion pump, the desulfurization comprises basic functional components such as a front cooler, a first fan, a rear cooler and a desulfurization tower, and the demisting comprises basic functional components such as a tail end washer, a demister, a cooling pump and a washing pump. The flue gas to be treated is discharged into the atmosphere after sequentially passing through the desulfurizing tower, the dust remover and the demister. The invention has the greatest advantages that the tasks of desulfurization, denitration and dust removal are completed by one step, no secondary pollutant is generated, compared with the traditional lime hydrate semi-dry desulfurization technology, the resistance is lower, the dust and SOx content in tail gas is lower, the content of soluble salt in the smoke is effectively reduced, the invention is consistent with the control factor of dust in air pollutants in the United states, Japan, Germany and the like, the white smoke is changed into white fog, and the condition of forming the haze is fundamentally cut off.
Description
Technical Field
The invention relates to the technical field of chemical industry and environmental protection, in particular to a device and a method for treating flue gas.
Background
The wet desulphurization has the characteristic of removing certain dust in the flue gas, the circulating slurry serving as an absorbent in the pollutant removal link has high density, the entrainment amount of the mist in the tail gas is large, the content of soluble salt brought into the atmosphere by the tail gas is high, and the soluble salt is one of the main factors for forming the haze; for controlling chloride ionsThe process has large wastewater discharge amount, which is the second major characteristic of wet desulphurization; in addition, the difficult problem of recycling the wet gypsum is great, and the difficult problem of solid waste accumulation can not be effectively solved all the time. The dry desulfurization mass transfer rate is low, the operation cost is high, the representative processes are the SDS desulfurization process and the active carbon desulfurization process of the sodium bicarbonate desulfurization technology, the adopted enterprises generally have the embarrassment of tiger, and the negative benefits brought to the enterprises by the processes are deeply realized. The semidry desulfurization technology is another favored technology in recent years, but the system has large pressure loss and high energy consumption, meanwhile, the problem of service life of a cloth bag which is one of the most core is not effectively solved all the time, and the cloth bag can be frequently replaced to ensure that the dust is stably lower than 5mg/m for a long time3The operation cost is almost the same as that of dry desulphurization.
Disclosure of Invention
The device and the method for treating the flue gas can be used for treating any one of sulfur dioxide, sulfur, dust, nitric oxide and heavy metal in the flue gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for treating flue gas, which comprises a desulfurizer preparation device, a desulfurization device, a dust removal device and a demisting device which are communicated in sequence,
the desulfurizer preparation equipment comprises a desulfurizer storage bin and a digester;
the desulfurization equipment comprises a desulfurization tower, one end of the digester is connected with a desulfurizer storage bin, and the other end of the digester is connected with the desulfurization tower;
the dust removal equipment comprises a dust remover, and an outlet of the desulfurizing tower is connected with an inlet of the dust remover;
the dust removal equipment further comprises a second fan and a terminal washer, an outlet of the desulfurization tower is connected with an inlet of the dust remover, a gas-phase outlet of the dust remover is connected with an inlet of the second fan, a solid-phase outlet of the dust remover is divided into two paths, one path of the solid-phase outlet returns to the bottom of the desulfurization tower, the other path of the solid-phase outlet is outside a gypsum powder discharge system, and an outlet of the second fan is communicated with the demisting equipment.
Furthermore, the demisting device comprises a tail end washer, a demister, a cooling pump and a washing pump;
the outlet of the tail end washer is connected with the upper part of the liquid collector, the inlet of the cooling pump is connected with the lower part of the liquid collector, the outlet of the cooling pump is divided into two paths, one path is connected with the front cooler, the other path is connected with the rear cooler, the inlet of the washing pump is connected with the lower part of the liquid collector, and the outlet of the washing pump is connected with the tail end washer;
and the outlet of the second fan is connected with the inlet of the terminal scrubber.
Furthermore, the tail end washer is an air-conditioning spraying type cooling structure, an outlet of the washing pump is connected with the nozzle through a pipeline, and the nozzle is sprayed into the descending pipe downwards.
Further, the end scrubber is of a venturi tube structure type.
Furthermore, the end scrubber is of a dynamic wave structure, and the spray nozzles spray upwards.
Furthermore, the end washer is of a multi-spray pipe type structure.
Furthermore, the desulfurizer preparation equipment also comprises a digestion pump, wherein the water inlet end of the digestion pump is connected with the lowest end of the liquid collector, and the water outlet end of the digestion pump is connected with the digester.
Furthermore, the demister also comprises a filler, and the filler consists of a plurality of layers of regular fillers and a regular wire mesh demister or a ridge demister.
On the other hand, the invention also discloses a method of the device for treating the flue gas, which is based on the device for treating the flue gas and comprises the steps of treating the flue gas to be treated by a desulfurizing tower, a dust remover and a demister in sequence and then discharging the treated flue gas into the atmosphere;
wherein, a fresh desulfurizer is arranged in the desulfurizer storage bin, and the fresh desulfurizer is one or a combination of more of quick lime, hydrated lime, a mixture of the quick lime and the hydrated lime, sodium bicarbonate, sodium carbonate and sodium hydroxide;
the flow velocity of the gas to be treated in the desulfurizing tower is 14-30 m/s, and the retention time of the gas to be treated in the desulfurizing tower is controlled to be 1.2-5 s;
the front cooler reduces the temperature of the gas to be treated to 10-50 ℃ above the dew point temperature of the gas.
Further, the method also comprises the following steps:
adding a certain amount of alkaline substances including one or more of sodium hydroxide, sodium carbonate and slaked lime into the liquid collector;
the pH value of the slurry in the liquid collector is more than or equal to 5.1.
According to the technical scheme, the device and the method for treating the flue gas can realize the efficient removal of sulfur dioxide, can meet the stable and ultra-clean discharge of dust, do not generate waste water and solid waste, and are a real environment-friendly product.
The invention has the following beneficial effects:
the system has the greatest advantages that the tasks of desulfurization and dust removal are completed in one step, no secondary pollutants are generated, compared with the traditional lime hydrate semi-dry desulfurization technology, the resistance is lower, more environmental protection advantages are achieved, and the content of dust, SOx and NOx in tail gas is lower;
secondly, the by-product is dry powder gypsum, can be directly used for paving a roadbed, making autoclaved aerated bricks and the like, and has high subsequent utilization rate and no solid waste;
the waste water at the demisting end is used for slaking quicklime and cooling flue gas at the desulfurization section, and is a negative balance system of water, water needs to be continuously supplemented to the system, no waste water is generated, and the problem of high treatment cost of the waste water generated by wet desulfurization and wet dedusting is thoroughly solved;
the demisting section has certain effects of desulfurization, denitration and dust removal, and SO in the tail gas can be removed according to the requirement2Lower;
the tail end is washed by large flow of clean water, the total content of dust particles and soluble salt in the tail gas is low, the dust control factor is consistent with the dust control factor in air pollutants in scientific and environment-friendly areas such as America, Japan, Germany and the like, the 'white smoke' is changed into 'white fog', and the soluble salt component forming the haze is fundamentally cut off.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic illustration of a mist eliminator according to an embodiment of the present invention;
FIG. 3 is a schematic view of the venturi structure of the end scrubber of an embodiment of the present invention;
FIG. 4 is a schematic view of an empty tower spray configuration of an end scrubber of an embodiment of the present invention;
FIG. 5 is a schematic view of a dynamic wave configuration of an end scrubber of an embodiment of the present invention;
FIG. 6 is a schematic diagram of a multiple spray configuration of an end scrubber according to an embodiment of the present invention;
1. the system comprises a front cooler, 2, a first fan, 3, a rear cooler, 4, a desulfurizer storage bin, 5, a digester, 6, a desulfurization tower, 7, a dust remover, 8, a second fan, 9, a tail end scrubber, 10, a demister, 11, a cooling pump, 12, a scrubbing pump, 13, a digestion pump, 101, a liquid collector, 102, a filler, 103, wet electricity, 201, gypsum powder, 202, a chimney, 801, gas to be treated, 802, a fresh desulfurizer, 803, flushing water, 901, a nozzle, 902, a venturi, 903, a downcomer, 904, an riser and 905 a composite spray pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
As shown in fig. 1, the device and the process for treating flue gas described in this embodiment are described in combination as follows:
example 1
Referring to fig. 1, a complete set of technology and device for treating flue gas comprises desulfurizer preparation, desulfurization, dust removal and demisting, wherein the desulfurizer preparation comprises basic functional components such as a desulfurizer storage bin 4, a digester 5, a digester pump 13 and the like, one end of the digester 5 is connected with the desulfurizer storage bin 4, the other end of the digester 5 is connected with a desulfurization tower 6, the water inlet end of the digester pump 13 is connected with the lowest end of a liquid collector 101, and the digestion water of the digester 5 comes from slurry in the liquid collector 101.
The fresh desulfurizing agent of the embodiment can be one or more of quicklime, hydrated lime, a mixture of quicklime and hydrated lime, sodium bicarbonate, sodium carbonate and sodium hydroxide, and preferably a mixture of quicklime and hydrated lime. When the fresh desulfurizer is hydrated lime, the slaker 5 and the slaking pump 13 can be omitted. When the fresh desulfurizer is a mixture of quicklime and slaked lime, the mass fraction of the quicklime is not less than 0.5%, and the mass fraction of the preferable quicklime is 5-15%.
The desulfurization contain cooler 1 before the machine, first fan 2, behind the machine cooler 3, desulfurizing tower 6, the export of cooler 1 before the machine link to each other with the import of first fan 2, the export of first fan 2 and the import of behind the machine cooler 3 link to each other, the export of behind the machine cooler 3 and the air inlet of desulfurizing tower 6 link to each other. The gas to be treated is subjected to temperature regulation by a front cooler 1, a first fan 2 and a rear cooler 3 and then is subjected to desulfurizing tower 6, the gas to be treated is cooled by a water cooling method, and cooling water comes from a cooling pump 11. The front cooler 1 reduces the temperature of the gas to be treated to 10-80 ℃ above the dew point temperature of the gas, and the preferred temperature range is 25-35 ℃. When the pressure head of the second fan 8 is large enough, the gas to be treated can directly enter the desulfurizing tower 6 from the front cooler 1 without passing through the first fan 2 and the rear cooler 3. The desulfurizer prepared by the digester 5 is fed into the desulfurizing tower 6 from a desulfurizer feeding port of the desulfurizing tower 6 through a metering device, and then is mixed with the gas to be treated at the inlet of the desulfurizing tower, wherein the desulfurizing tower 6 usually adopts a vertical entrained flow structure. The desulfurizing tower 6 can be composed of a plurality of tower devices with the same specification, and can also be of a single tower structure. The flow velocity of the gas to be treated in the desulfurizing tower is 14-30 m/s, the residence time of the gas to be treated in the desulfurizing tower 6 is controlled to be 1.2-5 s, and the preferable residence time is 1.6-2.1 s.
The outlet of the desulfurizing tower 6 is connected with the inlet of the dust remover 7, the gas-phase outlet of the dust remover 7 is connected with the inlet of the second fan 8, the solid-phase outlet of the dust remover 7 is divided into two paths, one path returns to the bottom of the desulfurizing tower 6, and the other path is gypsum powder 201 discharged out of the system. The flue gas to be treated enters a dust remover 7 after coming out of an air outlet of the desulfurizing tower 6, the dust remover 7 can be a combination of a gravity settling chamber and a cyclone dust remover, and also can be composed of a plurality of same cyclone dust removers, and the preferred dust remover 7 is the cyclone dust remover. The dust collected by the dust remover 7 is divided into two paths by a material returning device, one path returns to a desulfurizer feeding port of the desulfurizing tower 6, the other path is discharged out of the system, and the gypsum discharged from the dust remover 7 is dry gypsum powder 201.
The gas 801 to be treated which exits the dust remover 7 enters the demister 10 through the second fan 8 and the end cooler 9. The tail end cooler 10 is cooled by spraying circulating water, the circulating water comes from a washing pump 11, and the liquid-gas ratio in the post-cooler 3 is 5-70L/m 3, preferably 20-30L/m 3.
The outlet of the second fan 8 is connected with the inlet of the end scrubber 9.
The demisting device comprises equipment such as a terminal scrubber 9, a demister 10, a cooling pump 11, a washing pump 12 and the like, wherein the demister 10 comprises a liquid collector 101, filler 102, wet electricity 103 and other functional structures. An amount of an alkaline substance, such as sodium hydroxide, sodium carbonate, slaked lime, etc., may be added to the liquid trap 101 of the demister 10. The relative density of the slurry in the liquid trap 101 is not higher than 1.08, preferably lower than 1.03.
The packing 102 has the functions of absorbing SO2 and demisting flue gas, and preferably, the packing 102 may be composed of a plurality of layers of structured packing and a structured wire mesh demister or a roof demister.
The export of terminal scrubber 9 link to each other with the upper portion of liquid trap 101, the import of cooling pump 11 link to each other with the lower part of liquid trap 101, the export of cooling pump 11 divide into two the tunnel, link to each other with cooler 1 before the machine all the way, another way links to each other with cooler 3 behind the machine, the import of washing pump 12 link to each other with the lower part of liquid trap 101, the export of washing pump link to each other with terminal scrubber 9. The front cooler 1 reduces the temperature of the gas to be treated to 10-50 ℃ above the dew point temperature of the gas; the post-cooler 3 adopts a circulating water spraying method, and the liquid-gas ratio is controlled to be 5-70L/m3. The washing water described in this embodiment is clear water, demineralized water, or other water treated by sewageAnd secondary water discharged after reaching the standard.
An appropriate amount of alkaline substances such as sodium hydroxide, sodium carbonate, slaked lime and the like can be added into the liquid collector 101, and the relative density of slurry in the liquid collector 101 is not higher than 1.08. The pH value of the slurry in the liquid collector 101 is not lower than 5.1.
Denitration agents can be added into the liquid collector (101), and the denitration agents comprise one or a combination of more than one of sodium hypochlorite and hypochlorous acid.
Referring to fig. 2 or 4, the end scrubber 9 is an air-conditioning spray type cooling structure, and the outlet of the scrubber pump is connected with a nozzle 901 through a pipeline, and the nozzle sprays downwards into a downcomer 903.
Example 2
As shown in fig. 3, the difference from embodiment 1 is that the end scrubber 9 of the present embodiment is a structural type of venturi tube 902. Wherein, the venturi tube realizes the mixing of two or more strands of materials by utilizing the negative pressure formed by the interception and expansion of fluid, and the principle is relatively simple. The device can be used as a mixer or a reactor between gas-liquid, gas-gas, liquid-gas and liquid-liquid, has high mixing efficiency and small requirement on space, and is more suitable for mixing with easily condensed/crystallized fluid; the invention has the defects of large resistance, high manufacturing precision, easy abrasion of the hose clamp area contacted with the fluid and easy abrasion, and in order to solve the problem of easy abrasion, the hose clamp is coated with a wear-resistant material with a certain thickness, and the wear-resistant material can be any one or combination of composite engineering plastics, silicon carbide, alloy and cement casting materials.
Example 3
As shown in fig. 5, the difference from the embodiment 2 is that the end scrubber 9 of the embodiment is of a dynamic wave principle structure, and the spray nozzles 901 spray upwards. The dynamic wave is in a limited space (mainly a prototype pipeline), gas flows from top to bottom, liquid is atomized by a nozzle from bottom to top and then flows down with the gas flow, and gas and liquid are in countercurrent contact and in cocurrent contact, so that mass transfer and heat transfer between the gas and the liquid are realized. Compared with a venturi, the resistance is small, and the contact time of the fluid to be mixed is relatively long; the defects of narrow application range, good gas-liquid mixing and poor gas-liquid-gas mixing.
Example 4
As shown in fig. 6, the difference from embodiment 3 is that the end scrubber 9 of the present embodiment has a structure of a multi-spray pipe 905. The advantages of a venturi and dynamic waves are integrated into the compound spray pipe, the low resistance and long contact time of the dynamic waves are compatible, and the compound spray pipe has the efficient mixing characteristic of the venturi; the disadvantage is that the consumption of material is relatively maximum.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A flue gas treatment device comprises a desulfurizer preparation device, a desulfurization device, a dust removal device and a demisting device which are communicated in sequence,
the desulfurizer preparation equipment comprises a desulfurizer storage bin (4) and a digester (5);
the desulfurization equipment comprises a desulfurization tower (6), one end of the digester (5) is connected with the desulfurizer storage bin (4), and the other end of the digester is connected with the desulfurization tower (6);
the dust removing equipment comprises a dust remover (7), and an outlet of the desulfurizing tower (6) is connected with an inlet of the dust remover (7);
the dust removal equipment further comprises a second fan (8) and a terminal washer (9), the outlet of the desulfurizing tower (6) is connected with the inlet of the dust remover (7), the gas-phase outlet of the dust remover (7) is connected with the inlet of the second fan (8), the solid-phase outlet of the dust remover (7) is divided into two paths, one path of the solid-phase outlet returns to the bottom of the desulfurizing tower (6), the other path of the solid-phase outlet is gypsum powder (201) discharged out of the system, and the outlet of the second fan (8) is communicated with the demisting equipment.
2. The flue gas treatment device according to claim 1, wherein: the demisting device comprises a tail end washer (9), a demister (10), a cooling pump (11) and a washing pump (12);
the outlet of the tail end washer (9) is connected with the upper part of the liquid collector (101), the inlet of the cooling pump (11) is connected with the lower part of the liquid collector (101), the outlet of the cooling pump (11) is divided into two paths, one path is connected with the front cooler (1), the other path is connected with the rear cooler (3), the inlet of the washing pump (12) is connected with the lower part of the liquid collector (101), and the outlet of the washing pump (12) is connected with the tail end washer (9);
the outlet of the second fan (8) is connected with the inlet of the end scrubber (9).
3. The flue gas treatment device according to claim 2, wherein: the tail end washer (9) is an air-conditioning spraying type cooling structure, the outlet of the washing pump (12) is connected with the nozzle (901) through a pipeline, and the nozzle (901) sprays downwards into the downcomer (903).
4. The flue gas treatment device according to claim 2, wherein: the end scrubber (9) is of the venturi tube structure type (902).
5. The flue gas treatment device according to claim 2, wherein: the tail end washer (9) is of a dynamic wave structure, and the nozzles (901) spray upwards.
6. The flue gas treatment device according to claim 2, wherein: the end scrubber (9) is of a multi-spray pipe type structure (905).
7. The flue gas treatment device according to claim 2, wherein: the desulfurizer preparation equipment also comprises a digestion pump (13), wherein the water inlet end of the digestion pump (13) is connected with the lowest end of the liquid collector (101), and the water outlet end of the digestion pump (13) is connected with the digester (5).
8. The flue gas treatment device according to claim 2, wherein: the demister (10) also comprises a filler (102), and the filler (102) consists of a plurality of layers of regular fillers and regular wire mesh demisters or ridge demisters.
9. A method of flue gas treatment equipment, based on any one of claims 1 to 8, characterized in that: the method comprises the steps of treating the flue gas to be treated by a desulfurizing tower, a dust remover and a demister in sequence and then discharging the treated flue gas into the atmosphere;
wherein, a fresh desulfurizer is arranged in the desulfurizer storage bin (4), and the fresh desulfurizer is one or a combination of more of quicklime, slaked lime, a mixture of the quicklime and the slaked lime, sodium bicarbonate, sodium carbonate and sodium hydroxide;
the flow velocity of the gas to be treated in the desulfurizing tower is 14-30 m/s, and the retention time of the gas to be treated in the desulfurizing tower (6) is controlled to be 1.2-5 s;
the front cooler (1) reduces the temperature of the gas to be treated to 10-80 ℃ above the dew point temperature of the gas.
10. The method of claim 9 for an apparatus for treating flue gas, comprising: further comprising:
adding a certain amount of alkaline substances including one or more of sodium hydroxide, sodium carbonate and slaked lime into the liquid collector (101);
or a denitration agent can be added into the liquid collector (101), wherein the denitration agent is one or the combination of more than one of sodium hypochlorite and hypochlorous acid;
the pH value of the slurry in the liquid collector (101) is more than or equal to 5.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161734.4A CN113797734A (en) | 2021-09-30 | 2021-09-30 | Device and method for treating flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161734.4A CN113797734A (en) | 2021-09-30 | 2021-09-30 | Device and method for treating flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113797734A true CN113797734A (en) | 2021-12-17 |
Family
ID=78897243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111161734.4A Pending CN113797734A (en) | 2021-09-30 | 2021-09-30 | Device and method for treating flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113797734A (en) |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003305332A (en) * | 2002-04-11 | 2003-10-28 | Ishikawajima Harima Heavy Ind Co Ltd | Control method and apparatus for desulfurized waste water from wet type flue-gas desulfurization equipment |
| CN1597062A (en) * | 2004-08-24 | 2005-03-23 | 北京中科通用能源环保有限责任公司 | Method of proceeding desulfurzation of smoke using waste alkali slag |
| CN101229473A (en) * | 2007-10-31 | 2008-07-30 | 浙江天蓝脱硫除尘有限公司 | Out tower oxidizing lime/acetylene sludge-gypsum process desulphurization technology and equipment |
| CN101259365A (en) * | 2008-04-25 | 2008-09-10 | 武汉凯迪电力环保有限公司 | Two-stage pre-spraying water circulating fluidized bed desulfurization technique and system thereof |
| CN101264418A (en) * | 2008-04-01 | 2008-09-17 | 浙江菲达环保科技股份有限公司 | Pre-cooling recycling semi-dry process desulfurization dust-removing technique |
| CN101612515A (en) * | 2008-06-28 | 2009-12-30 | 金隆铜业有限公司 | A kind of wet flue gas desulfurization method |
| CN201823471U (en) * | 2010-09-08 | 2011-05-11 | 江苏揽山环境科技有限公司 | Waste water zero emission wet-method flue-gas desulfurization device |
| US20130156664A1 (en) * | 2011-09-29 | 2013-06-20 | Bryan J. Jankura | Dry sorbent injection during steady-state conditions in dry scrubber |
| CN104226107A (en) * | 2014-08-21 | 2014-12-24 | 邓杰帆 | Composite bed treatment method and equipment of waste gas |
| US20150182910A1 (en) * | 2014-01-02 | 2015-07-02 | Alstom Technology Ltd | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| CN105344229A (en) * | 2014-08-19 | 2016-02-24 | 青岛炜烨锻压机械有限公司 | Method using cooling tower circulating water as flue gas desulphurization system water |
| CN105688610A (en) * | 2016-04-29 | 2016-06-22 | 云南驰宏锌锗股份有限公司 | Dynamic wave washing tower having automatic sewage drainage function and washing method thereof |
| EP3100781A1 (en) * | 2015-06-01 | 2016-12-07 | RUDIS poslovno zdruzenje za inzeniring in izgradnjo objekov d.o.o. | Process and apparatus for high performance flue gas cleaning |
| CN108543408A (en) * | 2018-04-16 | 2018-09-18 | 袁鹰 | Gas-liquid counter current contacts washer |
| CN208161351U (en) * | 2018-04-04 | 2018-11-30 | 苏州迈途环保设备有限公司 | A kind of soda acid emission-control equipment |
| CN208356379U (en) * | 2018-04-21 | 2019-01-11 | 宁波复卿环保科技有限公司 | A kind of spray column |
| CN109647173A (en) * | 2018-12-28 | 2019-04-19 | 浙江天蓝环保技术股份有限公司 | A kind of SO of semidry method-wet process serial2Flue gas desulfurization technique and device |
| CN209405950U (en) * | 2018-11-27 | 2019-09-20 | 浙江赛铬能源有限公司 | A kind of exhaust treatment system being alkylated acid-restoring plant |
| CN213433795U (en) * | 2020-08-14 | 2021-06-15 | 江苏惠然实业有限公司 | Flue gas desulfurization dust device |
| CN112973423A (en) * | 2021-04-16 | 2021-06-18 | 上海先耘环保科技有限公司 | Tail gas quenching-spraying integrated tower device for mining reduction furnace |
-
2021
- 2021-09-30 CN CN202111161734.4A patent/CN113797734A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003305332A (en) * | 2002-04-11 | 2003-10-28 | Ishikawajima Harima Heavy Ind Co Ltd | Control method and apparatus for desulfurized waste water from wet type flue-gas desulfurization equipment |
| CN1597062A (en) * | 2004-08-24 | 2005-03-23 | 北京中科通用能源环保有限责任公司 | Method of proceeding desulfurzation of smoke using waste alkali slag |
| CN101229473A (en) * | 2007-10-31 | 2008-07-30 | 浙江天蓝脱硫除尘有限公司 | Out tower oxidizing lime/acetylene sludge-gypsum process desulphurization technology and equipment |
| CN101264418A (en) * | 2008-04-01 | 2008-09-17 | 浙江菲达环保科技股份有限公司 | Pre-cooling recycling semi-dry process desulfurization dust-removing technique |
| CN101259365A (en) * | 2008-04-25 | 2008-09-10 | 武汉凯迪电力环保有限公司 | Two-stage pre-spraying water circulating fluidized bed desulfurization technique and system thereof |
| CN101612515A (en) * | 2008-06-28 | 2009-12-30 | 金隆铜业有限公司 | A kind of wet flue gas desulfurization method |
| CN201823471U (en) * | 2010-09-08 | 2011-05-11 | 江苏揽山环境科技有限公司 | Waste water zero emission wet-method flue-gas desulfurization device |
| US20130156664A1 (en) * | 2011-09-29 | 2013-06-20 | Bryan J. Jankura | Dry sorbent injection during steady-state conditions in dry scrubber |
| US20150182910A1 (en) * | 2014-01-02 | 2015-07-02 | Alstom Technology Ltd | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| CN105344229A (en) * | 2014-08-19 | 2016-02-24 | 青岛炜烨锻压机械有限公司 | Method using cooling tower circulating water as flue gas desulphurization system water |
| CN104226107A (en) * | 2014-08-21 | 2014-12-24 | 邓杰帆 | Composite bed treatment method and equipment of waste gas |
| EP3100781A1 (en) * | 2015-06-01 | 2016-12-07 | RUDIS poslovno zdruzenje za inzeniring in izgradnjo objekov d.o.o. | Process and apparatus for high performance flue gas cleaning |
| CN105688610A (en) * | 2016-04-29 | 2016-06-22 | 云南驰宏锌锗股份有限公司 | Dynamic wave washing tower having automatic sewage drainage function and washing method thereof |
| CN208161351U (en) * | 2018-04-04 | 2018-11-30 | 苏州迈途环保设备有限公司 | A kind of soda acid emission-control equipment |
| CN108543408A (en) * | 2018-04-16 | 2018-09-18 | 袁鹰 | Gas-liquid counter current contacts washer |
| CN208356379U (en) * | 2018-04-21 | 2019-01-11 | 宁波复卿环保科技有限公司 | A kind of spray column |
| CN209405950U (en) * | 2018-11-27 | 2019-09-20 | 浙江赛铬能源有限公司 | A kind of exhaust treatment system being alkylated acid-restoring plant |
| CN109647173A (en) * | 2018-12-28 | 2019-04-19 | 浙江天蓝环保技术股份有限公司 | A kind of SO of semidry method-wet process serial2Flue gas desulfurization technique and device |
| CN213433795U (en) * | 2020-08-14 | 2021-06-15 | 江苏惠然实业有限公司 | Flue gas desulfurization dust device |
| CN112973423A (en) * | 2021-04-16 | 2021-06-18 | 上海先耘环保科技有限公司 | Tail gas quenching-spraying integrated tower device for mining reduction furnace |
Non-Patent Citations (1)
| Title |
|---|
| 曹伟伟;李培生;: "脱硫脱硝除尘除雾一体化新技术在炼油厂和焦化厂的应用", 硫酸工业, no. 07, pages 55 - 58 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100496676C (en) | Wet ammonia flue gas cleaning technology simultaneously removing various pollutant and system thereof | |
| CN101157003B (en) | Wet-type ammonia flue gas purification technics for associated desulfuration demercuration and system | |
| CN101053747A (en) | Simultaneously desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof | |
| WO2017019283A1 (en) | Sulfur enhanced nitrogen production from emission scrubbing | |
| IL115847A (en) | Flue gas scrubbing apparatus | |
| CN1962034A (en) | Method and apparatus for removing sulfur, nitrate and mercury simultaneously from boiler flue gas | |
| CN102974185A (en) | Modularized integrated smoke purification system and method for removing plurality of pollutants | |
| CN101343077A (en) | Method for preparing gypsum by removing boiler flue gas sulphur dioxide with white slime from ammonia alkali factory | |
| CN101306317A (en) | Tower top discharge type flue gas desulfurization method | |
| CN205164488U (en) | Mixed flue gas wet flue gas desulfurization device of fire coal - catalysis | |
| CN209138324U (en) | A kind of high effective flue gas fair current dust-removal and desulfurizing disappears white device | |
| CN105148698A (en) | Boiler flue gas desulfurization and denitrification system | |
| CN102343215A (en) | Dual-chamber multi-absorption wet flue gas desulfurizing device | |
| CN105107366B (en) | A kind of concurrent spray semi-dry fume desulfuration method | |
| CN201735331U (en) | Waste gas desulfurization device | |
| CN101306319A (en) | Direct discharging flue gas treatment method | |
| CN2845897Y (en) | Liquid-column tower smoke desulfurizing device | |
| CN1087645C (en) | Method and equipment for desulfurizing flue gas by circulation and fluidization | |
| CN101791513A (en) | Jacking-type exhaust-gas treatment device and method | |
| CN101549254A (en) | Jacking flue gas processing device and method | |
| CN113797734A (en) | Device and method for treating flue gas | |
| CN112875740B (en) | System and method for preparing high-purity gypsum from semi-dry desulfurized fly ash | |
| CN202724993U (en) | Flue gas desulphurization system combining dry process and wet process | |
| CN210814692U (en) | Flue gas desulfurization is with spraying tympanic bulla tower system | |
| CN101549253A (en) | Mixed-flow discharge gas treatment method and treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |