CN113577913A - Glass kiln flue gas desulfurization, denitrification and dedusting integrated device and process - Google Patents
Glass kiln flue gas desulfurization, denitrification and dedusting integrated device and process Download PDFInfo
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 58
- 230000023556 desulfurization Effects 0.000 title claims abstract description 58
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003546 flue gas Substances 0.000 title claims abstract description 50
- 239000011521 glass Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 18
- 238000007664 blowing Methods 0.000 claims abstract description 89
- 230000003197 catalytic effect Effects 0.000 claims abstract description 87
- 239000000919 ceramic Substances 0.000 claims abstract description 57
- 239000007789 gas Substances 0.000 claims abstract description 57
- 239000012528 membrane Substances 0.000 claims abstract description 57
- 239000000428 dust Substances 0.000 claims abstract description 43
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims description 47
- 238000002347 injection Methods 0.000 claims description 42
- 239000007924 injection Substances 0.000 claims description 42
- 239000002245 particle Substances 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 18
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052878 cordierite Inorganic materials 0.000 claims description 3
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 description 8
- 238000007599 discharging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/546—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using nano- or microfibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/869—Multiple step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0241—Other waste gases from glass manufacture plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention discloses a glass kiln flue gas desulfurization, denitrification and dust removal integrated device which comprises a desulfurization and denitrification agent storage tank, a desulfurization and denitrification reactor, a blowing system, a pattern plate, a catalytic ceramic membrane, a transition bin and an ash conveying pipe, wherein the desulfurization and denitrification reactor comprises an upper box body, a middle box body and a lower box body, the pattern plate is positioned between the upper box body and the middle box body, and the pattern plate is provided with pattern plate holes; the catalytic ceramic membrane comprises an expansion section, a catalytic main body and a support bottom, wherein the catalytic main body comprises a filter layer, a filtering catalytic layer, a main catalytic layer and a main clean gas channel from outside to inside, the thickness of the main catalytic layer is 3-10cm, and auxiliary clean gas channels are distributed in the main catalytic layer. The invention discloses a desulfurization, denitrification and dedusting integrated device and a desulfurization, denitrification and dedusting process for glass kiln flue gas, which can finish dedusting, desulfurization and denitrification in one device, greatly reduce the volume of glass kiln flue gas treatment equipment and reduce equipment investment while improving the desulfurization, denitrification and dedusting efficiency.
Description
Technical Field
The invention belongs to the technical field of flue gas treatment, and particularly relates to a glass kiln flue gas desulfurization, denitrification and dust removal integrated device and process.
Background
The flue gas in the glass industry has the characteristics of large flue gas amount and low concentrations of dust, oxysulfide and nitric oxide, the existing treatment process generally adopts the steps that the flue gas is led out from a temperature window of about 350 ℃ of a first waste heat boiler and enters a high-temperature electric dust removal system for dust removal, then the flue gas enters an SCR denitration system to reduce NOx into N2 and H2O under the action of a reducing agent NH3, and the flue gas reaching the dust removal and denitration standards immediately enters a second waste heat boiler to recover heat to about 120 ℃ and enters a dry desulfurization device and is finally discharged into the atmosphere through a chimney. However, due to the particularity of the glass industry that the dust particles are extremely small and have strong viscosity, the process has some problems: 1) the high-temperature electric dust removal efficiency is difficult to reach the design efficiency; 2) the denitration catalyst is quickly inactivated due to the problem of high-temperature electric precipitation, so that the denitration operation for several months cannot reach the design efficiency; 3) the process has two dust removal processes, namely an electric dust removal process and a cloth bag dust removal system required by dry desulphurization, so that the system is redundant, the occupied area of equipment is large, and the investment and operation cost are overlarge. At present, the desulfurization, denitrification and dust removal integrated technology is realized by adopting a catalytic ceramic membrane, in order to reduce the running resistance of the catalytic ceramic membrane, the wall thickness of the ceramic membrane is generally not more than 1cm, the contact time of flue gas and the catalytic ceramic membrane is too short, and nitrogen oxides cannot react fully. The wall thickness of the catalytic ceramic membrane is increased, and after the operation resistance is increased, the reverse blowing effect is deteriorated, and dust on the surface of the catalytic ceramic membrane cannot be effectively removed.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a glass kiln flue gas desulfurization, denitrification and dust removal integrated device and a process, which can finish dust removal, desulfurization and denitrification in one device, greatly reduce the volume of glass kiln flue gas treatment equipment and reduce equipment investment while improving the desulfurization, denitrification and dust removal efficiency.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a glass kiln flue gas desulfurization, denitrification and dust removal integrated device comprises a desulfurization and denitrification agent storage tank, a desulfurization and denitrification reactor, a blowing system, a pattern plate, a catalytic ceramic membrane, a transition bin and an ash conveying pipe, wherein the desulfurization and denitrification reactor comprises an upper box body, a middle box body and a lower box body, the pattern plate is positioned between the upper box body and the middle box body, and the pattern plate is provided with pattern plate holes;
the catalytic ceramic membrane comprises an expansion section, a catalytic main body and a supporting bottom, wherein the catalytic main body comprises a filtering layer, a filtering catalytic layer, a main catalytic layer and a main clean gas channel from outside to inside, the thickness of the main catalytic layer is 3-10cm, and auxiliary clean gas channels are distributed in the main catalytic layer;
the blowing system comprises an air bag, an upper blowing valve, a lower blowing valve, an upper blowing main pipe, an upper blowing branch pipe, an upper blowing cavity, a lower blowing main pipe, a lower support structure, a lower blowing branch pipe and a lower blowing cavity, the outer wall of the air bag is provided with a heating resistance wire, the upper blowing main pipe is connected with the air bag through an upper blowing valve, the upper blowing cavity is positioned at the lower part of the flower plate hole of the flower plate and is enclosed by the flower plate, the catalytic ceramic membrane and the elastic sheet, one end of the upper blowing branch pipe is connected with the upper blowing main pipe, the other end of the upper blowing branch pipe extends into the upper blowing cavity, the lower blowing main pipe is connected with air through the lower blowing valve, one end of the lower support structure is fixed on the outer wall of the lower blowing main pipe, the other end of the lower support structure is fixed on the outer wall of the lower blowing cavity, the lower blowing cavity is defined by an elastic outer wall and a catalytic ceramic membrane, the catalytic ceramic membrane is positioned in the middle box body, the upper end of the catalytic ceramic membrane is suspended on a pattern plate hole of the pattern plate, and the lower end of the catalytic ceramic membrane is arranged in the lower blowing cavity.
Further, the side part of the lower box body of the desulfurization and denitrification reactor is provided with a flue gas inlet, the bottom of the lower box body is provided with an ash discharge port, an ash discharge valve is installed on the ash discharge port, and the upper box body is provided with a gas outlet.
Further, the desulfurization and denitrification agent storage tank is divided into a desulfurizer storage tank and a denitrification agent storage tank, and the desulfurizer storage tank and the denitrification agent storage tank are connected with the flue gas inlet.
Furthermore, the top of the transition bin is connected with an ash discharging port, the bottom of the transition bin is provided with a discharge port, the discharge port is connected with an ash conveying pipe 7, the discharge port is provided with a discharge valve, and the transition bin is provided with a heat preservation heating device.
Furthermore, the diameter of the ceramic membrane catalysis main body is 10-20cm, the material is one of silicon carbide, alumina or cordierite, the ceramic membrane catalysis main body is formed by sintering fibers or particles, when the particles are sintered, the particle diameter of the filter layer is 3-10 mu m, the particle diameter of the filter catalysis layer is 8-16 mu m, the particle diameter of the main catalysis layer is 15-30 mu m, the diameter of the main clean gas channel is 5-10cm, the diameter of the auxiliary clean gas channel is 3-5cm, the number of the auxiliary clean gas channels is 5-10, and the auxiliary clean gas channels are evenly distributed around the main clean gas channel; when the fiber is sintered, the diameter of the fiber of the filter layer is 1-5 μm, the diameter of the fiber of the filter catalyst layer is 5-10 μm, the diameter of the fiber of the main catalyst layer is 10-20 μm, the diameter of the main clean gas channel is 3-5cm, the diameter of the auxiliary clean gas channel is 1-3cm, the number of the auxiliary clean gas channels is 5-10, and the auxiliary clean gas channels are evenly distributed around the main clean gas channel.
Further, the denitration catalyst is loaded on the filtering catalyst layer and the main catalyst layer in a co-sintering mode, the type of the filtering catalyst layer is V2O5-WO3-Pt catalyst, the content of the catalyst is 3-10%, the type of the filtering catalyst layer is V2O5-WO3 catalyst, and the content of the catalyst is 30-50%.
A process for performing desulfurization, denitrification and dust removal by using the glass kiln flue gas desulfurization, denitrification and dust removal integrated device comprises the following steps:
the method comprises the following steps: the glass kiln flue gas enters the desulfurization and denitrification reactor from a flue gas inlet at the temperature of 350-;
step two: dust in the flue gas is intercepted in a filtering layer of the catalytic ceramic membrane, the flue gas enters a main catalytic layer after being pre-catalyzed by a filtering catalytic layer, and nitrogen oxide in the flue gas reacts with a denitration agent under the action of a catalyst;
step three: when the pressure drop of the desulfurization and denitrification reactor is increased to 50-60% of the initial pressure drop, an upper injection valve and a lower injection valve of an injection system are simultaneously opened, high-temperature high-pressure gas is respectively injected into an upper injection cavity and a lower injection cavity from an upper injection branch pipe and a lower injection branch pipe along the upper injection main pipe and the lower injection main pipe, an elastic sheet of the upper injection cavity and an elastic outer wall of the lower injection cavity expand under the action of pressure, an injection gap is opened between the elastic sheet and the elastic outer wall of the lower injection cavity and a catalytic ceramic membrane, the high-temperature high-pressure injection gas is injected tightly to the outer wall of the catalytic ceramic membrane, and dust attached to the outer wall of the catalytic ceramic membrane is removed;
step four: the dust falling from the surface of the catalytic ceramic membrane enters the lower box body, enters the filter bin under the action of the ash discharge valve, the ash discharge valve is opened after a certain amount of dust is accumulated in the transition bin, and the dust enters the ash conveying pipe 7 from the discharge port.
Further, in the first step, the desulfurizer is alkaline substances such as CaO, NaCO3, NaOH, and the like, and the denitrifier is ammonia gas.
Further, in the third step, the pressure of the blowing gas is 0.3-0.6MPa, and the temperature of the blowing gas is 200-300 ℃.
The invention relates to a glass kiln flue gas desulfurization, denitrification and dedusting integrated device and a process, wherein a catalytic ceramic membrane is used as a main element for dedusting, desulfurization and denitrification, in order to increase the catalytic area of the catalytic ceramic membrane and reduce the running resistance, the catalytic ceramic membrane is designed in a gradient structure, the diameter of particles or fibers used at the outermost layer is the smallest, the size of the particles or fibers is gradually transited to the inner layer, the diameter of the particles or fibers in a main catalytic layer is the largest, and an auxiliary clean gas channel is added in the main catalytic layer to reduce the problem of resistance increase caused by thickening of the main catalytic layer. The catalyst is added in the filtration catalyst layer and the main catalyst layer by adopting a co-sintering process, the catalyst in the filtration catalyst layer contains Pt metal with stronger catalytic activity, so that reactants can be pre-catalyzed to generate a catalytic intermediate with stronger activity, and the catalytic reaction is easier after the reactants enter the main catalyst layer. In order to solve the problem that the reverse blowing effect of the thickness of the catalytic ceramic membrane is poor, the invention discloses a ceramic membrane surface blowing system and a ceramic membrane surface blowing process.
Drawings
FIG. 1 is a schematic structural view of a desulfurization, denitrification and dust removal integrated device of a glass kiln, which is disclosed by the invention;
figure 2 is a schematic structural view of a blowing system according to the present invention;
FIG. 3 is a schematic view of the catalytic ceramic membrane structure according to the present invention;
FIG. 4 is a schematic cross-sectional view of a catalytic ceramic membrane according to the present invention.
Wherein, 1-a desulfurization and denitrification agent storage tank, 2-a desulfurization and denitrification reactor, 3-a blowing system, 4-a flower plate, 5-a catalytic ceramic membrane, 6-a transition bin, 7-an ash conveying pipe, 201-an upper box body, 202-a middle box body, 203-a lower box body, 2031-a flue gas inlet, 2032-an ash discharging port, 2033-an ash discharging valve, 301-an air bag, 302-an upper blowing valve, 303-a lower blowing valve, 304-an upper blowing main pipe, 305-an upper blowing branch pipe, 306-an upper blowing cavity, 307-a lower blowing main pipe, 308-a lower support structure, 309-a lower blowing branch pipe, 310-a lower blowing cavity, 3011-a heating resistance wire, 3061-an elastic sheet, 501-an expansion section, 502-a catalytic body, 503-a support bottom and 5021-a filter layer, 5022, a filtering catalysis layer, 5023, a main catalysis layer, 5024, an auxiliary clean gas channel, 5025, a main clean gas channel, 601, a heat preservation heating device, 602, a discharge hole and 603, wherein the auxiliary clean gas channel is arranged on the bottom of the main catalysis layer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and can be, for example, mechanically or electrically connected, or can be internal to two elements, directly connected, or indirectly connected through an intermediate medium. The specific meaning of the above terms can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1-4, a glass kiln flue gas desulfurization, denitrification and dust removal integrated device comprises a desulfurization and denitrification agent storage tank 1, a desulfurization and denitrification reactor 2, a blowing system 3, a pattern plate 4, a catalytic ceramic membrane 5, a transition bin 6 and an ash conveying pipe 7, wherein the desulfurization and denitrification reactor 2 comprises an upper box body 201, a middle box body 202 and a lower box body 203, the pattern plate 4 is positioned between the upper box body 201 and the middle box body 202, and the pattern plate 4 is provided with pattern plate holes;
the desulfurization and denitrification agent storage tank 1 is divided into a desulfurizer storage tank 101 and a denitrification agent storage tank 102, and the desulfurizer storage tank 101 and the denitrification agent storage tank 102 are connected with a flue gas inlet 2031;
a flue gas inlet 2031 is formed in the side part of the lower box body 203 of the desulfurization and denitrification reactor 2, an ash discharge port 2032 is formed in the bottom part of the lower box body, an ash discharge valve 2033 is installed at the ash discharge port 2032, and an air outlet 2011 is formed in the upper box body 201; the top of the transition bin 6 is connected with an ash discharge port 2032, the bottom of the transition bin is provided with a discharge port 602, the discharge port 602 is connected with an ash conveying pipe 7, the discharge port 602 is provided with a discharge valve 603, and the transition bin 6 is provided with a heat preservation heating device 601; the catalytic ceramic membrane 5 comprises an expansion section 501, a catalytic main body 502 and a support bottom 503, wherein the catalytic main body 502 comprises a filtering layer 5021, a filtering catalytic layer 5022, a main catalytic layer 5023 and a main clean gas channel 5025 from outside to inside, the main catalytic layer 5023 is 3-10cm thick, and auxiliary clean gas channels 5024 are distributed in the main catalytic layer 5023; the blowing system 3 comprises an air bag 301, an upper blowing valve 302, a lower blowing valve 303, an upper blowing main pipe 304, an upper blowing branch pipe 305, an upper blowing cavity 306, a lower blowing main pipe 307, a lower support structure 308, a lower blowing branch pipe 309 and a lower blowing cavity 310, wherein a heating resistance wire 3011 is arranged on the outer wall of the air bag 301, the upper blowing main pipe 304 is connected with the air bag 301 through the upper blowing valve 302, the upper blowing cavity 306 is positioned at the lower part of a flower plate hole of the flower plate 4 and is surrounded by the flower plate 4, a catalytic ceramic membrane 6 and an elastic sheet 3061, one end of the upper blowing branch pipe 305 is connected with the upper blowing main pipe 304, the other end of the upper blowing branch pipe extends into the upper blowing cavity 306, the lower blowing main pipe 307 is connected with the air bag 301 through the lower blowing valve 303, one end of the lower support structure 308 is fixed on the outer wall of the lower blowing main pipe 307, the other end of the lower blowing structure is fixed on the outer wall of the lower blowing cavity 310, the lower blowing cavity 301 is surrounded by the elastic outer wall 3101 and the catalytic ceramic membrane 5, the catalytic ceramic membrane 5 is located in the middle box 202, and the upper end of the catalytic ceramic membrane is suspended on the pattern plate holes of the pattern plate 4, and the lower end of the catalytic ceramic membrane is arranged in the lower blowing cavity 310.
In some embodiments, the ceramic membrane 5 catalyst body 502 has a diameter of 10 to 20cm, is made of one of silicon carbide, alumina or cordierite, and is formed by sintering fibers or particles, when the particles are sintered, the particle diameter of the filter layer 5021 is 3 to 10 μm, the particle diameter of the filter catalyst layer 5022 is 8 to 16 μm, the particle diameter of the main catalyst layer 5023 is 15 to 30 μm, the diameter of the main clean gas channel 5025 is 5 to 10cm, the diameter of the auxiliary clean gas channel 5024 is 3 to 5cm, and the number of the auxiliary clean gas channels 5024 is 5 to 10, and the auxiliary clean gas channels 5024 are evenly distributed around the main clean gas channel; when the fibers are sintered, the diameter of the fibers of the filter layer 5021 is 1-5 μm, the diameter of the fibers of the filter catalyst layer 5022 is 5-10 μm, the diameter of the fibers of the main catalyst layer 5023 is 10-20 μm, the diameter of the main clean gas channel 5025 is 3-5cm, the diameter of the auxiliary clean gas channel 5024 is 1-3cm, the number of the auxiliary clean gas channels 5024 is 5-10, and the auxiliary clean gas channels are evenly distributed around the main clean gas channel.
In some embodiments, the filtration catalyst layer 5022 and the main catalyst layer 5023 are loaded with a denitration catalyst in a co-sintering manner, the filtration catalyst layer 5022 is a V2O5-WO3-Pt catalyst with a content of 3-10%, and the filtration catalyst layer 5023 is a V2O5-WO3 catalyst with a catalyst content of 30-50%.
The process for performing desulfurization, denitrification and dust removal by using the integrated device for desulfurization, denitrification and dust removal of the flue gas of the glass kiln comprises the following steps:
the method comprises the following steps: the glass kiln flue gas enters the desulfurization and denitrification reactor 2 from a flue gas inlet 2031 at the temperature of 350-;
step two: dust in the flue gas is intercepted in a filtering layer 5021 of a catalytic ceramic membrane 5, the flue gas enters a main catalytic layer 5023 after being pre-catalyzed by a filtering catalytic layer 5022, and nitrogen oxide in the flue gas reacts with a denitrifying agent under the action of a catalyst;
step three: when the pressure drop of the desulfurization and denitrification reactor 2 is increased to 50-60% of the initial pressure drop, the upper injection valve 302 and the lower injection valve 303 of the injection system 3 are simultaneously opened, high-temperature and high-pressure gas is respectively injected into the upper injection cavity 306 and the lower injection cavity 310 from the upper injection branch pipe 305 and the lower injection branch pipe 309 along the upper injection main pipe 304 and the lower injection main pipe 307, under the action of pressure, the elastic sheet 3061 of the upper injection cavity 306 and the elastic outer wall 3101 of the lower injection cavity 310 expand, an injection gap is opened between the high-temperature and high-pressure gas and the catalytic ceramic membrane 5, the high-temperature and high-pressure gas is injected tightly to the outer wall of the catalytic ceramic membrane 5, and dust attached to the outer wall of the catalytic ceramic membrane 5 is removed;
step four: the dust falling from the surface of the catalytic ceramic membrane enters the lower box body 203, enters the filter bin 6 under the action of the dust discharging valve 2033, the discharging valve 603 is opened after a certain amount of dust is accumulated in the transition bin 6, and the dust enters the dust conveying pipe 7 through the discharge hole 602.
In some embodiments, the desulfurizing agent in the first step is one of CaO, NaCO3 and NaOH, and the denitrifying agent is ammonia gas.
In some embodiments, the pressure of the blowing gas in the third step is 0.3-0.6MPa, and the temperature of the blowing gas is 200-300 ℃.
In the description herein, references to the description of "one embodiment," "an example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The integrated device for desulfurization, denitrification and dedusting of the flue gas of the glass kiln is characterized by comprising a desulfurization and denitrification agent storage tank, a desulfurization and denitrification reactor, a blowing system, a pattern plate, a catalytic ceramic membrane, a transition bin and an ash conveying pipe, wherein the desulfurization and denitrification reactor comprises an upper box body, a middle box body and a lower box body, the pattern plate is positioned between the upper box body and the middle box body, and the pattern plate is provided with a pattern plate hole;
the catalytic ceramic membrane comprises an expansion section, a catalytic main body and a supporting bottom, wherein the catalytic main body comprises a filtering layer, a filtering catalytic layer, a main catalytic layer and a main clean gas channel from outside to inside, the thickness of the main catalytic layer is 3-10cm, and auxiliary clean gas channels are distributed in the main catalytic layer;
the blowing system comprises an air bag, an upper blowing valve, a lower blowing valve, an upper blowing main pipe, an upper blowing branch pipe, an upper blowing cavity, a lower blowing main pipe, a lower support structure, a lower blowing branch pipe and a lower blowing cavity, the outer wall of the air bag is provided with a heating resistance wire, the upper blowing main pipe is connected with the air bag through an upper blowing valve, the upper blowing cavity is positioned at the lower part of the flower plate hole of the flower plate and is enclosed by the flower plate, the catalytic ceramic membrane and the elastic sheet, one end of the upper blowing branch pipe is connected with the upper blowing main pipe, the other end of the upper blowing branch pipe extends into the upper blowing cavity, the lower blowing main pipe is connected with air through the lower blowing valve, one end of the lower support structure is fixed on the outer wall of the lower blowing main pipe, the other end of the lower support structure is fixed on the outer wall of the lower blowing cavity, the lower blowing cavity is defined by an elastic outer wall and a catalytic ceramic membrane, the catalytic ceramic membrane is positioned in the middle box body, the upper end of the catalytic ceramic membrane is suspended on a pattern plate hole of the pattern plate, and the lower end of the catalytic ceramic membrane is arranged in the lower blowing cavity.
2. The integrated desulfurization, denitrification and dedusting device for glass kiln flue gas as recited in claim 1, wherein the lower box of the desulfurization and denitrification reactor is provided with a flue gas inlet at the side part, and an ash discharge port at the bottom, the ash discharge port is provided with an ash discharge valve, and the upper box is provided with an air outlet.
3. The integrated desulfurization, denitrification and dedusting device for glass kiln flue gas as recited in claim 1, wherein the desulfurization and denitrification agent storage tank is divided into a desulfurizer storage tank and a denitrification agent storage tank, and the desulfurizer storage tank and the denitrification agent storage tank are connected with the flue gas inlet.
4. The integrated desulfurization, denitrification and dedusting device for glass kiln flue gas as recited in claim 1, wherein the top of the transition bin is connected with an ash discharge port, the bottom of the transition bin is provided with a discharge port, the discharge port is connected with an ash conveying pipe 7, the discharge port is provided with a discharge valve, and the transition bin is provided with a heat preservation and heating device.
5. The integrated desulfurization, denitrification and dedusting device for glass kiln flue gas as claimed in claim 1, wherein the ceramic membrane catalyst main body has a diameter of 10-20cm, is made of one of silicon carbide, alumina or cordierite, and is sintered from fibers or particles, when the particles are sintered, the particle diameter of the filter layer is 3-10 μm, the particle diameter of the filter catalyst layer is 8-16 μm, the particle diameter of the main catalyst layer is 15-30 μm, the diameter of the main clean gas channel is 5-10cm, the diameter of the auxiliary clean gas channel is 3-5cm, and the number of the auxiliary clean gas channels is 5-10, and the auxiliary clean gas channels are evenly distributed around the main clean gas channel; when the fiber is sintered, the diameter of the fiber of the filter layer is 1-5 μm, the diameter of the fiber of the filter catalyst layer is 5-10 μm, the diameter of the fiber of the main catalyst layer is 10-20 μm, the diameter of the main clean gas channel is 3-5cm, the diameter of the auxiliary clean gas channel is 1-3cm, the number of the auxiliary clean gas channels is 5-10, and the auxiliary clean gas channels are evenly distributed around the main clean gas channel.
6. The glass kiln flue gas desulfurization, denitrification and dust removal integrated device according to claim 1, wherein the filtration catalyst layer and the main catalyst layer are loaded with a denitration catalyst in a co-sintering manner, the filtration catalyst layer is a V2O5-WO3-Pt catalyst with a content of 3-10%, the filtration catalyst layer is a V2O5-WO3 catalyst with a catalyst content of 30-50%.
7. A process for desulfurization, denitrification and dust removal by using the integrated desulfurization, denitrification and dust removal device for glass kiln flue gas of claims 1-6, comprising the following steps:
the method comprises the following steps: the glass kiln flue gas enters the desulfurization and denitrification reactor from a flue gas inlet at the temperature of 350-;
step two: dust in the flue gas is intercepted in a filtering layer of the catalytic ceramic membrane, the flue gas enters a main catalytic layer after being pre-catalyzed by a filtering catalytic layer, and nitrogen oxide in the flue gas reacts with a denitration agent under the action of a catalyst;
step three: when the pressure drop of the desulfurization and denitrification reactor is increased to 50-60% of the initial pressure drop, an upper injection valve and a lower injection valve of an injection system are simultaneously opened, high-temperature high-pressure gas is respectively injected into an upper injection cavity and a lower injection cavity from an upper injection branch pipe and a lower injection branch pipe along the upper injection main pipe and the lower injection main pipe, an elastic sheet of the upper injection cavity and an elastic outer wall of the lower injection cavity expand under the action of pressure, an injection gap is opened between the elastic sheet and the elastic outer wall of the lower injection cavity and a catalytic ceramic membrane, the high-temperature high-pressure injection gas is injected tightly to the outer wall of the catalytic ceramic membrane, and dust attached to the outer wall of the catalytic ceramic membrane is removed;
step four: the dust falling from the surface of the catalytic ceramic membrane enters the lower box body, enters the filter bin under the action of the ash discharge valve, the ash discharge valve is opened after a certain amount of dust is accumulated in the transition bin, and the dust enters the ash conveying pipe 7 from the discharge port.
8. The integrated desulfurization, denitrification and dedusting process for glass kiln flue gas as recited in claim 7, wherein in the first step, the desulfurizing agent is CaO, NaCO3, NaOH and other alkaline substances, and the denitrifying agent is ammonia gas.
9. The integrated desulfurization, denitrification and dedusting process for glass kiln gas as recited in claim 7, wherein in the third step, the pressure of the injection gas is 0.3-0.6MPa, and the temperature of the injection gas is 200-300 ℃.
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| CN116966750A (en) * | 2023-08-18 | 2023-10-31 | 宜兴市苏哈电力设备有限公司 | Integrated denitration, desulfuration and dust removal device for glass kiln flue gas and application method of integrated denitration, desulfuration and dust removal device |
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