CN116769400B - Plugging material for dry suction tower flue gas pipeline and plugging method thereof - Google Patents
Plugging material for dry suction tower flue gas pipeline and plugging method thereof Download PDFInfo
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- CN116769400B CN116769400B CN202310573530.4A CN202310573530A CN116769400B CN 116769400 B CN116769400 B CN 116769400B CN 202310573530 A CN202310573530 A CN 202310573530A CN 116769400 B CN116769400 B CN 116769400B
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- flue gas
- gas pipeline
- matrix resin
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- 239000000463 material Substances 0.000 title claims abstract description 72
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000003546 flue gas Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000010439 graphite Substances 0.000 claims abstract description 46
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011159 matrix material Substances 0.000 claims abstract description 41
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 22
- 230000001070 adhesive effect Effects 0.000 claims abstract description 22
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 18
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 17
- 239000007822 coupling agent Substances 0.000 claims abstract description 17
- 239000010452 phosphate Substances 0.000 claims abstract description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 17
- 229910000323 aluminium silicate Inorganic materials 0.000 claims abstract description 14
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004111 Potassium silicate Substances 0.000 claims abstract description 11
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical group [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052913 potassium silicate Inorganic materials 0.000 claims abstract description 11
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims description 72
- 239000011248 coating agent Substances 0.000 claims description 71
- 238000000227 grinding Methods 0.000 claims description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 239000000843 powder Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- 238000012216 screening Methods 0.000 claims description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005202 decontamination Methods 0.000 claims description 5
- 230000003588 decontaminative effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 41
- 238000005260 corrosion Methods 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 239000011247 coating layer Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C09D201/06—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
Abstract
The invention relates to the technical field of flue gas pipeline plugging, and discloses a plugging material for a dry suction tower flue gas pipeline and a plugging method thereof, wherein the plugging material comprises, by mass, 30% -50% of matrix resin, 25% -35% of graphite flakes, 5% -10% of adhesive, 5% -10% of curing agent, 3% -5% of coupling agent, 5% -10% of aluminosilicate and 5% of water, the adhesive is potassium silicate, the curing agent is high molecular phosphate, and the coupling agent is silane coupling agent; according to the invention, the graphite flake, the potassium silicate and the high polymer phosphate are arranged, so that the graphite flake can be mutually overlapped to form a compact impermeable layer when the plugging is carried out, thereby having an anti-corrosion effect.
Description
Technical Field
The invention relates to the technical field of flue gas pipeline plugging, in particular to a plugging material for a dry suction tower flue gas pipeline and a plugging method thereof.
Background
Drying towers, absorption towers and the like in sulfuric acid production have the problems of leakage in the production process, serious pollution to equipment and surrounding environment and safe production, and the inner lining of the equipment can be corroded and shed due to the fact that the inside of the drying towers, the absorption towers and the like contain strong corrosive media such as acid gas, sulfuric acid and the like, in particular to the inlet flue part of the tower.
When sulfuric acid is produced, the drying of flue gas containing SO 2 and the absorption of SO 3 are very important two processes, and the two processes are the drying and absorption of generated SO 2 flue gas and SO 3 flue gas by using concentrated sulfuric acid as an absorbent, and all adopt acid-resistant filler towers spraying concentrated sulfuric acid, SO that in engineering design, the structures of a drying tower and an absorption tower in the sulfuric acid production process are almost identical, and for the drying tower and the absorption tower with basically identical structures, the flue part of a flue gas inlet of the drying tower often causes frequent leakage of the part in the gas-liquid contact process, and if the drying tower and the absorption tower are not repaired or repaired improperly in time, the service lives of the drying tower and the absorption tower are seriously shortened, SO that a plugging material of a flue gas pipeline and a plugging method thereof are needed to solve the problem of leakage of a flue gas inlet pipeline of the equipment.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a plugging material for a dry suction tower flue gas pipeline and a plugging method thereof, so as to solve the technical problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a plugging material for a dry absorption tower flue gas pipeline comprises, by mass, 30% -50% of matrix resin, 25% -35% of graphite flakes, 5% -10% of an adhesive, 5% -10% of a curing agent, 3% -5% of a coupling agent, 5% -10% of aluminosilicate and 5% of water.
In a preferred embodiment, the binder is potassium silicate, the curing agent is a polymeric phosphate, and the coupling agent is a silane coupling agent.
In a preferred embodiment, the matrix resin is an epoxy vinyl resin and the graphite flake has a diameter of 0.04mm to 0.12mm.
A preparation method of a plugging material for a dry absorption tower flue gas pipeline comprises the following steps:
Step A1, placing matrix resin and graphite flakes in a grinding tank, and grinding for 20 minutes;
step A2, sieving the ground matrix resin and graphite flakes through a screen, and repeatedly grinding the powder which does not pass through the screen until the powder completely passes through the screen;
Step A3, adding adhesive potassium silicate, curing agent high molecular phosphate and silane coupling agent into a stirrer and mixing for 10 minutes;
step A4, adding the screened matrix resin and graphite flakes into a stirrer, and mixing the matrix resin, the binder, the curing agent and the silane coupling agent for 20-30 minutes;
and A5, adding water into the stirrer, and mixing for 20-40 minutes to form a daub material to form the plugging material.
In a preferred embodiment, the number of grinding tanks in the step A1 is two, namely a coarse grinding tank and a fine grinding tank, and two screens are provided in the step A1 and step A2, so that the matrix resin and the graphite flake ground by the two grinding tanks need to pass through the two screens in sequence.
In a preferred embodiment, the first screen has a mesh size of 50 mesh and the second screen has a mesh size of 120 mesh, and the matrix resin and graphite flake powder particles which have not passed through the 50 mesh screen are fed into the coarse grinding tank for grinding, and the matrix resin and graphite flake powder particles which have not passed through the second screen are fed into the fine grinding tank for grinding.
A plugging method for a dry suction tower flue gas pipeline comprises the following steps:
Step B1: carrying out oil removal, decontamination and rust removal treatment on the flue gas pipeline where the gap is located, so as to ensure that the surface of the flue gas pipeline is cleaner;
Step B2, coating a plugging material on the surface of the cleaned flue gas pipeline, wherein the thickness of the coating is 2-4 mm, and forming a first coating;
step B3, placing a plugging material above the steel wire blanket, and spreading the plugging material on the steel wire blanket to form a second coating with the thickness of 4-6 mm;
step B4, binding the steel wire blanket at a gap of the flue gas pipeline through a steel wire, and enabling the first coating and the second coating to be in contact with each other;
step B5, injecting molten polymer phosphate into the steel wire blanket, and heating for 10-20 minutes;
and B6, integrating and curing the first coating and the second coating after heating, so as to plug the flue gas pipeline and take down the steel blanket.
In a preferred embodiment, the flue gas duct is treated to remove oil, dirt and rust from the flue gas duct, the clean outer edge of the flue gas duct being three cm outside the gap, and the outer edge of the first coating being two cm outside the gap.
In a preferred embodiment, the area of the second coating is consistent with the cleaning area of the flue gas duct, and the second coating is in contact with the first coating and the second coating covers the first coating.
In a preferred embodiment, the steel blanket is allowed to stand for more than half an hour before being removed, and the gap size inside the steel blanket is 0.3mm to 0.6mm.
The invention has the technical effects and advantages that:
1. According to the invention, the graphite flake, the potassium silicate and the high-molecular phosphate are arranged, so that the graphite flake can be mutually overlapped to form a compact impermeable layer when plugging is carried out, thereby having a corrosion effect;
2. According to the invention, the two grinding tanks and the two screens are arranged, and the powder particles with larger diameters are screened out through the screens with meshes of 50 meshes after grinding, so that the powder particles are directly sent back to the coarse grinding tank, and the powder particles screened out through the screens with meshes of 120 meshes are put into the fine grinding tank for grinding, and the problem of slower screening during one-time screening can be prevented through twice screening;
3. The invention has the advantages that the first coating, the second coating and the steel wire blanket are arranged, the first coating is thinner and is directly contacted with the flue gas pipeline, so that the first coating can be ensured to completely cover the gap, the second coating is covered again, the whole thickness of the steel wire blanket is ensured to be enough to play a role in plugging, the steel wire blanket is adopted for fixation, and the gap is formed in the steel wire blanket, so that molten polymer phosphate can be directly contacted with a plugging material through the steel wire blanket and is heated, the rapid solidification can be performed, and the plugging efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the overall process flow of the present invention.
Detailed Description
The embodiments of the present invention will be described more fully below with reference to the accompanying drawings, and the configurations of the structures described in the following embodiments are merely illustrative, and the plugging material for flue gas pipes of a dry suction tower and the plugging method thereof according to the present invention are not limited to the structures described in the following embodiments, but all other embodiments obtained by a person skilled in the art without making any creative effort are within the scope of the present invention.
Referring to fig. 1, in a first embodiment, the invention provides a plugging material for a flue gas pipeline of a dry absorption tower, which comprises, by mass, 30% -50% of a matrix resin, 25% -35% of graphite flakes, 5% -10% of an adhesive, 5% -10% of a curing agent, 3% -5% of a coupling agent, 5% -10% of aluminosilicate and 5% of water.
In the embodiment of the application, when the plugging material is used for plugging, graphite flakes are mutually overlapped and arranged to form a compact impermeable layer, so that the plugging material has a corrosion effect, and the graphite flakes can resist the temperature of 800 ℃ at most, so that the plugging material can be used in different high-temperature environments, potassium silicate and high-molecular phosphate are adopted for curing, the curing effect is better, and aluminate can also have the effects of acid resistance and heat resistance.
Further, the adhesive is potassium silicate, the curing agent is high molecular phosphate, the coupling agent is silane coupling agent, and the potassium silicate reacts with the high molecular phosphate and is cured at the moment, so that the adhesive can be better fixed with a flue gas pipeline to prevent falling, the aluminosilicate has the effects of acid resistance and heat resistance, and the material can be prevented from melting and falling in the flue gas pipeline, so that the material has excellent performance in use.
Further, the matrix resin is epoxy vinyl resin, the diameter of the graphite flake is 0.04-0.12 mm, and the epoxy vinyl resin has higher corrosion resistance in use, so that when the flue gas pipeline contains sulfur, the epoxy vinyl resin cannot be corroded easily to leak again, the diameter of the graphite flake is limited, the graphite flake is ensured to be more compact in use, and an overhead cavity is not easy to form.
Further, the plugging material A is prepared from 35% of matrix resin, 35% of graphite flake, 5% of adhesive, 10% of curing agent, 3% of coupling agent, 7% of aluminosilicate and 5% of water by mass percent.
In the second embodiment, compared with the first embodiment, the plugging material B is prepared from 35% of matrix resin, 40% of graphite flake, 5% of adhesive, 5% of curing agent, 3% of coupling agent, 7% of aluminosilicate and 5% of water according to the mass fraction ratio.
In the third embodiment, compared with the first embodiment, the plugging material C is prepared from 40% of matrix resin, 30% of graphite flake, 7% of adhesive, 6% of curing agent, 3% of coupling agent, 9% of aluminosilicate and 5% of water according to the mass fraction ratio.
In the fourth embodiment, compared with the first embodiment, the plugging material D is prepared from 40% of matrix resin, 35% of graphite flake, 6% of adhesive, 6% of curing agent, 3% of coupling agent, 5% of aluminosilicate and 5% of water according to the mass fraction ratio.
In the fifth embodiment, compared with the first embodiment, the plugging material E is prepared from 45% of matrix resin, 30% of graphite flake, 5% of adhesive, 5% of curing agent, 5% of coupling agent, 5% of aluminosilicate and 5% of water according to the mass fraction ratio.
In the sixth embodiment, compared with the first embodiment, the plugging material F is prepared from 50% of matrix resin, 25% of graphite flake, 6% of adhesive, 6% of curing agent, 3% of coupling agent, 5% of aluminosilicate and 5% of water according to the mass fraction ratio.
In the seventh embodiment, compared with the first embodiment, the plugging material G is prepared from 45% of matrix resin, 25% of graphite flake, 8% of adhesive, 8% of curing agent, 3% of coupling agent, 6% of aluminosilicate and 5% of water according to the mass fraction ratio.
Materials A-F are selected as preparation experimental samples, performance detection is carried out, and the detection results are shown in the following table:
| Sample name | Material A | Material B | Material C | Material D | Material E | Material F | Material G |
| Etch resistance (%) | 88％ | 89％ | 91％ | 92％ | 91％ | 86％ | 90％ |
| Acid resistance (%) | 87％ | 85％ | 92％ | 92％ | 89％ | 85％ | 87％ |
| Compressive strength (MPa) | 77 | 78 | 74 | 79 | 73 | 76 | 74 |
| Adhesive force (MPa) | 3.4 | 3.5 | 3.7 | 3.9 | 3.7 | 3.8 | 4.0 |
| Temperature resistance (. Degree. C.) | 175 | 180 | 176 | 178 | 176 | 175 | 175 |
The plugging material D is prepared from 30-50% of matrix resin, 25-35% of graphite flake, 5-10% of adhesive, 5-10% of curing agent, 3-5% of coupling agent, 5-10% of aluminosilicate and 5% of water, has good corrosion resistance, acid resistance and temperature resistance when in use, has good compressive strength and adhesive strength, can meet the plugging requirement of a flue gas pipeline, is convenient to use by coating the plugging material D on a gap when in use, and adopts the mass fraction ratio of 40% of matrix resin, 35% of graphite flake, 6% of adhesive, 6% of curing agent, 3% of coupling agent, 5% of aluminosilicate and 5% of water to prepare the plugging material D.
An eighth embodiment is a method for preparing a plugging material for a flue gas pipeline of a dry absorption tower, comprising the following steps:
Step A1, placing matrix resin and graphite flakes in a grinding tank, and grinding for 20 minutes;
step A2, sieving the ground matrix resin and graphite flakes through a screen, and repeatedly grinding the powder which does not pass through the screen until the powder completely passes through the screen;
Step A3, adding adhesive potassium silicate, curing agent high molecular phosphate and silane coupling agent into a stirrer and mixing for 10 minutes;
step A4, adding the screened matrix resin and graphite flakes into a stirrer, and mixing the matrix resin, the binder, the curing agent and the silane coupling agent for 20-30 minutes;
and A5, adding water into the stirrer, and mixing for 20-40 minutes to form a daub material to form the plugging material.
Further, the number of grinding tanks in the step A1 is two, namely a coarse grinding tank and a fine grinding tank, two screening nets are arranged in the step A1 and step A2, matrix resin and graphite flake ground by the two grinding tanks need to sequentially pass through the two screening nets, the mesh opening of the first screening net is 50 meshes, the mesh opening of the second screening net is 120 meshes, matrix resin and graphite flake powder particles which do not pass through the 50 meshes are sent into the coarse grinding tank for grinding, and matrix resin and graphite flake powder particles which do not pass through the second screening net are sent into the fine grinding tank for grinding.
In the embodiment of the application, two grinding tanks and two screens are arranged, the ground matrix resin and graphite flake powder particles firstly pass through the screen with 50 meshes, larger-diameter powder particles are screened out at the moment, so that the powder particles are directly sent back to the coarse grinding tank and pass through the screen with 120 meshes, and the screened powder particles do not reach the required size, but have smaller phase difference, so that the powder particles are put into the fine grinding tank for grinding, and pass through the screen twice, the problem of slower screening when screening is prevented, and the powder which does not meet the requirements is divided into two batches, and the problem of time waste caused by screening the particles with the near-size requirement for a plurality of times in the coarse grinding tank is avoided.
In the embodiment of the application, the common mixing time of the curing agent and the silane coupling agent is 20 minutes, water is added into a stirrer, and the materials are mixed for 20 minutes to prepare the material I.
In example nine, the material II was prepared by adding water to a stirrer and mixing for 30 minutes, except that the mixing time of the curing agent of the present application and the silane coupling agent was 25 minutes, as compared with example eight.
In example ten, the material III was prepared by adding water to a stirrer and mixing for 40 minutes, except that the mixing time of the curing agent and the silane coupling agent according to the present application was 30 minutes, as compared with example eight.
In example eleven, material four was prepared by adding water to the mixer and mixing for 30 minutes, except that the co-mixing time of the curing agent of the present application and the silane coupling agent was 20 minutes, as compared with example eight.
In example twelve, material five was produced, except that the co-mixing time of the curing agent of the present application and the silane coupling agent was 20 minutes, and water was added to the stirrer and mixed for 40 minutes, as compared with example eight.
In the thirteenth example, the curing agent of the present application and the silane coupling agent were mixed together for 25 minutes, and water was added to the mixer and mixed for 20 minutes, to prepare a material six, as compared with the eighth example.
In example fourteen, material seven was produced, as compared with example eight, except that the co-mixing time of the curing agent of the present application and the silane coupling agent was 25 minutes, water was added to the stirrer, and mixed for 40 minutes.
Materials one to seven are selected as experimental samples for performance detection, and the detection results are shown in the following table:
| Sample name | Material one | Material II | Material III | Material IV | Material five | Six materials | Seventh material |
| Leak stopping Rate (%) | 90％ | 98％ | 98％ | 95％ | 95％ | 93％ | 95％ |
| Time (min) | 40 | 55 | 70 | 50 | 60 | 45 | 65 |
| Energy consumption (W) | 400 | 550 | 700 | 500 | 600 | 450 | 650 |
The plugging rate is the success rate of plugging by adopting the material prepared by the method, the plugging material prepared by the method can have better plugging effect when in use, the common mixing time of the curing agent and the silane coupling agent is 25 minutes, and when the material is processed by adding water into a stirrer and mixing for 30 minutes, the processing time is shorter and the energy consumption is lower.
Embodiment fifteen, a plugging method for a dry absorption tower flue gas pipeline, comprising the following steps:
Step B1: carrying out oil removal, decontamination and rust removal treatment on the flue gas pipeline where the gap is located, so as to ensure that the surface of the flue gas pipeline is cleaner;
Step B2, coating a plugging material on the surface of the cleaned flue gas pipeline, wherein the thickness of the coating is 2-4 mm, and forming a first coating;
step B3, placing a plugging material above the steel wire blanket, and spreading the plugging material on the steel wire blanket to form a second coating with the thickness of 4-6 mm;
step B4, binding the steel wire blanket at a gap of the flue gas pipeline through a steel wire, and enabling the first coating and the second coating to be in contact with each other;
step B5, injecting molten polymer phosphate into the steel wire blanket, and heating for 10-20 minutes;
and B6, integrating and curing the first coating and the second coating after heating, so as to plug the flue gas pipeline and take down the steel blanket.
Further, when the flue gas pipeline carries out deoiling decontamination rust removal and processes, the clean outer edge of the flue gas pipeline should be in the three centimetres department outside the gap, the outer edge of first coating is in two centimetres departments outside the gap, the area of second coating keeps unanimous with the clean area of flue gas pipeline, and when second coating contacted with first coating, and the second coating should cover first coating, the size of second coating is greater than first coating, thereby guarantee that the second coating can cover first coating, and first coating can cover the gap, when avoiding adopting single coating and gap contact, can appear the gas leakage position, and then can't play the problem of leaking stoppage effect.
Further, before the steel wire blanket is taken down, the steel wire blanket needs to be kept still for more than half an hour, the size of a gap inside the steel wire blanket is 0.3-0.6 mm, after the steel wire blanket is kept still, the steel wire blanket is taken down, the steel wire blanket is prevented from being heated, the steel wire blanket is hotter and is easy to scald after being taken down, the gap inside the steel wire blanket is 0.3-0.6 m, and the molten polymer phosphate is prevented from falling off when the molten polymer phosphate can enter.
In the embodiment of the application, the thickness of the first coating is 2mm, the thickness of the second coating is 4mm, and the plugging effect is detected to form the first effect.
In example sixteen, compared with example fifteen, the difference is that the thickness of the first coating is 2mm, the thickness of the second coating is 5mm, and the plugging effect is detected to form an effect two.
In example seventeenth, compared with example fifteen, the difference is that the thickness of the first coating layer is 2mm, the thickness of the second coating layer is 6mm, and the plugging effect is detected to form an effect III.
In example eighteen, compared with example fifteen, the difference is that the thickness of the first coating is 3mm, the thickness of the second coating is 4mm, and the plugging effect is detected to form four effects.
In example twenty, compared with example fifteen, the difference is that the thickness of the first coating layer is 3mm, the thickness of the second coating layer is 5mm, and the plugging effect is detected to form an effect five.
In example twenty-first, compared with example fifteen, the difference is that the thickness of the first coating is 3mm, the thickness of the second coating is 6mm, and the plugging effect is detected to form six effects.
In example twenty two, compared with example fifteen, the difference is that the thickness of the first coating is 4mm, the thickness of the second coating is 4mm, and the plugging effect is detected, so that the effect seven is formed.
In example twenty-third, compared with example fifteen, the difference is that the thickness of the first coating layer is 4mm, the thickness of the second coating layer is 5mm, and the plugging effect is detected to form an effect eight.
In example sixteen, compared with example fifteen, the difference is that the thickness of the first coating layer is 4mm, the thickness of the second coating layer is 6mm, and the plugging effect is detected to form an effect nine.
And (3) establishing an effect comparison table of plugging effects one to nine, wherein the effects are as follows:
| Effect name | Etch resistance (%) | Acid resistance (%) | Compressive strength (MPa) |
| Effect one | 80 | 79 | 73 |
| Effect two | 86 | 87 | 77 |
| Effect III | 86 | 87 | 77 |
| Effect four | 91 | 92 | 79 |
| Effect five | 92 | 93 | 79 |
| Effect six | 92 | 93 | 79 |
| Effect seven | 90 | 88 | 79 |
| Effect eight | 92 | 93 | 79 |
| Effect nine | 92 | 93 | 79 |
Above-mentioned, when adopting first coating and the second coating of different thickness to carry out the leaking stoppage, gather can play better leaking stoppage effect, when the thickness of first coating is 3mm, and the thickness of second coating is 4mm to and the thickness of first coating is 3mm, and the thickness of second coating is 5mm, and the performance difference of these two kinds of coatings is less to the thickness of coating is thinner, consequently the user can select to use according to the in-service use requirement.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily appreciate variations or alternatives within the scope of the present application. The scope of the application should therefore be determined by the scope of the claims
Finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (1)
1. A plugging material for a dry absorption tower flue gas pipeline is characterized in that: comprises 30 to 50 percent of matrix resin, 25 to 35 percent of graphite flake, 5 to 10 percent of adhesive, 5 to 10 percent of curing agent, 3 to 5 percent of coupling agent, 5 to 10 percent of aluminosilicate and 5 percent of water according to the mass percentage ratio;
a preparation method of a plugging material for a dry absorption tower flue gas pipeline comprises the following steps:
Step A1, placing matrix resin and graphite flakes in a grinding tank, and grinding the matrix resin and the graphite flakes for 15-25 minutes;
step A2, sieving the ground matrix resin and graphite flakes through a screen, and repeatedly grinding the powder which does not pass through the screen until the powder completely passes through the screen;
Step A3, adding adhesive potassium silicate, curing agent high molecular phosphate and silane coupling agent into a stirrer and mixing for 10 minutes;
step A4, adding the screened matrix resin and graphite flakes into a stirrer, and mixing the matrix resin, the binder, the curing agent and the silane coupling agent for 20-30 minutes;
Step A5, adding water into the stirrer, and mixing for 20-40 minutes to form a daub material to form a plugging material;
Placing matrix resin and graphite flake in a grinding tank, and grinding the matrix resin and the graphite flake for 15-25 minutes, wherein two grinding tanks are respectively a coarse grinding tank and a fine grinding tank in the step A1, two screening nets are arranged in the step A1 and the step A2, and the matrix resin and the graphite flake which are ground by the two grinding tanks need to sequentially pass through the two screening nets;
a plugging method for a dry suction tower flue gas pipeline comprises the following steps:
Step B1: carrying out oil removal, decontamination and rust removal treatment on the flue gas pipeline where the gap is located, so as to ensure that the surface of the flue gas pipeline is cleaner;
Step B2, coating a plugging material on the surface of the cleaned flue gas pipeline, wherein the thickness of the coating is 2-4 mm, and forming a first coating;
step B3, placing a plugging material above the steel wire blanket, and spreading the plugging material on the steel wire blanket to form a second coating with the thickness of 4-6 mm;
step B4, binding the steel wire blanket at a gap of the flue gas pipeline through a steel wire, and enabling the first coating and the second coating to be in contact with each other;
step B5, injecting molten polymer phosphate into the steel wire blanket, and heating for 10-20 minutes;
Step B6, the first coating and the second coating are integrated and cured after being heated, so that a flue gas pipeline is plugged, and the steel blanket is taken down;
The adhesive is potassium silicate, the curing agent is high molecular phosphate, and the coupling agent is silane coupling agent;
the matrix resin is vinyl resin, and the diameter of the graphite flake is 0.04-0.12 mm;
The mesh of the first screen is 50 meshes, the mesh of the second screen is 120 meshes, and the matrix resin and graphite flake powder particles which do not pass through the 50 meshes are sent into a coarse grinding tank for grinding, and the matrix resin and graphite flake powder particles which do not pass through the second screen are sent into a fine grinding tank for grinding;
when the flue gas pipeline is subjected to oil removal, decontamination and rust removal treatment, the cleaning outer edge of the flue gas pipeline is positioned at a position of three centimeters outside the gap, and the outer edge of the first coating is positioned at a position of two centimeters outside the gap;
the area of the second coating is consistent with the cleaning area of the flue gas pipeline, and when the second coating is contacted with the first coating, the second coating covers the first coating;
Before the steel wire blanket is taken down, the steel wire blanket needs to be kept stand for more than half an hour, and the size of a gap inside the steel wire blanket is 0.3-0.6 mm.
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