CN105013246B - A kind of filtering material with demercuration effect and preparation method thereof - Google Patents
A kind of filtering material with demercuration effect and preparation method thereof Download PDFInfo
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- CN105013246B CN105013246B CN201510383443.8A CN201510383443A CN105013246B CN 105013246 B CN105013246 B CN 105013246B CN 201510383443 A CN201510383443 A CN 201510383443A CN 105013246 B CN105013246 B CN 105013246B
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Abstract
The invention provides a kind of preparation method of the filtering material with demercuration effect, comprise the following steps：(1) after active metal catalyst powder is mixed with PTFE resin powder, the PTFE fiber containing catalyst and the PTFE microporous membranes containing catalyst is respectively prepared；(2) PTFE fiber containing catalyst and high-strength PTFE fiber are used 1 10:Warp beam is made in 1 10 modes being alternately arranged, and PTFE base cloth layers are made by the way of woven；(3) needing machine is put into together with PTFE base cloth layers after base material is mixed with the PTFE chopped fibers containing catalyst, PTFE compound spiked felts are made；(4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mixed treating liquid, PTFE compound spiked felts is carried out to sinter at 280 350 DEG C after mass-impregnation processing；(5) the PTFE compound spiked felts after sintering and the PTFE microporous membranes containing catalyst are introduced into hot laminating machine simultaneously, surface carries out hot pressing overlay film processing.The present invention can significantly improve filtering accuracy and demercuration and heavy metal efficiency.
Description
Technical field
The present invention relates to Environmental-protecting dust-removing filed of flue gas purification, more particularly to a kind of filtering material with demercuration effect and
Its preparation method.
Background technology
Mercury is a kind of poisonous traces of heavy metals element in coal, the harm pole that mercury pollution is caused to the mankind and biotic environment
Greatly.The whole world is discharged into mercury total amount about 5000t in air every year, and wherein 4000t is artificial result, and causes mercury environmental pollution
Artificial source be mainly making in smelting, chlorine industry and the electrical equipment industry of burning, mercury ore and other metals of fossil fuels
With mercury etc., what wherein share was maximum derives from burning.
Mercury content is general in (0.012~33) mg/kg in coal in world wide, and average mercury content is about 0.13mg/kg, ground
Shell abundance is 0.089, and world's coal mercury content is that the average content of mercury in 0.012mg/kg, China's coal is 0.22mg/kg.Coal-fired mistake
The discharge of journey mercury, the mercury emissions of particularly large-scale coal-fired power station boiler have suitable harmfulness, it is endangered in the circulation of local mercury
Not only there is evil property disguised but also with potentiality, i.e. mercury bioaccumulation to be difficult to eliminate.It is dry heavy that substantial amounts of mercury passes through
The methyl mercury (MeHg) of severe toxicity is formed after drop or wet deposition polluted-water, biological respinse, is enriched with fish and other biological body
Human body can be recycled into again afterwards, the mankind are caused with greatly harm.
For the emission control of coal-fired flue-gas mercury, there is various control methods at present, including using charcoal absorption as
The absorption method of representative, utilizes the removal of mercury method of existing desulfurizer or dust arrester, corona discharge plasma method, electrocatalytic oxidation
Combined Treatment method etc..All there is removal efficiency in various methods.
The content of the invention
Present invention aim to address subproblem present in existing demercuration and heavy metal filtrate technology, there is provided one kind tool
There is filtering material of demercuration effect and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions：
A kind of preparation method of the filtering material with demercuration effect, comprises the following steps：
(1) after active metal catalyst powder is mixed with PTFE resin powder, the PTFE containing catalyst is respectively prepared
Fiber and the PTFE microporous membranes containing catalyst；
(2) PTFE fiber containing catalyst and high-strength PTFE fiber are used into 1-10:The mode system that 1-10 is alternately arranged
Into warp beam, weaved by the way of woven and PTFE base cloth layers are made；
(3) needing machine is put into together with PTFE base cloth layers after base material is mixed with the PTFE chopped fibers containing catalyst,
The both sides of PTFE base cloth layers form catalysis PTFE fiber strength layer, and PTFE compound spiked felts are made；
(4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mixed treating liquid, it is compound to PTFE
Nomex carries out mass-impregnation processing, is sintered afterwards at 280-350 DEG C；
(5) the PTFE compound spiked felts after sintering and the PTFE microporous membranes containing catalyst are introduced into hot laminating machine simultaneously
In, surface carries out hot pressing overlay film processing.
Preferably, active metal catalyst is V in the step (1)2O5/TiO2Or V2O5-WO3/TiO2。
Preferably, active metal catalyst powder, the mass ratio of PTFE resin powder are 1~10 in the step (1):99
~90.
Preferably, the base material in the step (3) is in PPS fibers, PTFE fiber, glass, P84, aramid fiber, PSA fiber
One or more.
Preferably, the mass ratio of the active ingredient of active metal catalyst emulsion and PTFE emulsion is in the step (4)
1-99:99-1。
Preferably, the active ingredient of the active metal catalyst emulsion is V2O5/TiO2Or V2O5-WO3/TiO2。
Preferably, the solid content of the active metal catalyst emulsion is 40~60%.
Preferably, the solid content of the PTFE emulsion is 30~50%.
The filtering material with demercuration effect prepared according to the above method, successively including the PTFE micropores containing catalyst
Film layer, the first catalyst mixed treating liquid dipping layer, PTFE compound spiked felts, the second catalyst mixed treating liquid dipping layer；
The PTFE compound spiked felts include the first catalysis PTFE fiber strength layer, PTFE base cloth layers, the second catalysis being sequentially connected
PTFE fiber strength layer；Between PTFE microporous film layers containing catalyst and the first catalyst mixed treating liquid the dipping layer
Pass through hot pressing cladding.
Beneficial effects of the present invention：
(1) filtering material with demercuration effect of the invention has applicable working condition scope wide, without changing original work
Skill equipment and working condition, you can complete the catalytic decomposition of the remaining harmful substance such as mercury and heavy metal；System operation safety and steady,
The notable features such as high-efficiency low-resistance long-life, energy resource consumption and operation and maintenance cost lower 30%；
(2) filtering material with demercuration effect of the invention has effects that surface filtration simultaneously, and dust is trapped in
The surface of filtrate, it is possible to achieve Dust Capacity is less than 5mg/Nm3Near-zero release；
(3) filtering material with demercuration effect of the invention is while filtrating smoke dust, due to multi-level catalyst
The introducing of distribution layer, lifts the contact area of waste gas and catalyst, greatly improves to harmful substances such as mercury and heavy metals at double
Efficiency is catalytically decomposed；Give full play to the function that filtrate removes harmful substance；
(4) base material is made with catalysis PTFE fiber using superfine glass fiber, it is ensured that filtrate integrally has higher tensile strength,
There is the catalytic decomposition function of the harmful substances such as mercury and heavy metal simultaneously；
(5) the filtering material heat resistance with demercuration effect of the invention is outstanding, can continuous 200 DEG C of operating temperature,
Moment heatproof is up to 220 DEG C.
Brief description of the drawings
Fig. 1 is the structural representation of filtrate of the present invention.
Embodiment
In order to which the present invention is better described, with reference to the accompanying drawing in the embodiment of the present invention, in the embodiment of the present invention
Technical scheme is clearly and completely described.
A kind of preparation method of the filtering material with demercuration effect, comprises the following steps：(1) by active metal catalyst
After powder is mixed with PTFE resin powder, the PTFE fiber containing catalyst is respectively prepared and the PTFE micropores containing catalyst are thin
Film；(2) PTFE fiber containing catalyst and high-strength PTFE fiber are used into 1-10:The mode that 1-10 is alternately arranged be made through
Axle, is weaved by the way of woven and PTFE base cloth layers is made；(3) after base material is mixed with the PTFE chopped fibers containing catalyst with
PTFE base cloth layers are put into needing machine together, and catalysis PTFE fiber strength layer is formed in the both sides of PTFE base cloth layers, and PTFE is made and answers
Close Nomex；(4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mixed treating liquid, it is compound to PTFE
Nomex carries out mass-impregnation processing, is sintered afterwards at 280-350 DEG C；(5) by the PTFE compound spiked felts after sintering with
PTFE microporous membranes containing catalyst are introduced into hot laminating machine simultaneously, and surface carries out hot pressing overlay film processing.In the step (1)
Active metal catalyst is V2O5/TiO2Or V2O5-WO3/TiO2.Active metal catalyst powder, PTFE trees in the step (1)
The mass ratio at cosmetics end is 1~10:99~90.Base material in the step (3) be selected from PPS fibers, PTFE fiber, glass,
One or more in P84, aramid fiber, PSA fiber.Active metal catalyst emulsion and PTFE emulsion is effective in the step (4)
The mass ratio of composition is 1-99:99-1.The active ingredient of the active metal catalyst emulsion is V2O5/TiO2Or V2O5-WO3/
TiO2.The solid content of the active metal catalyst emulsion is 40~60%.The solid content of the PTFE emulsion is 30~50%.
The filtering material with demercuration effect prepared according to the above method, successively including the PTFE micropores containing catalyst
Film layer, the first catalyst mixed treating liquid dipping layer, PTFE compound spiked felts, the second catalyst mixed treating liquid dipping layer；
The PTFE compound spiked felts include the first catalysis PTFE fiber strength layer, PTFE base cloth layers, the second catalysis being sequentially connected
PTFE fiber strength layer；Between PTFE microporous film layers containing catalyst and the first catalyst mixed treating liquid the dipping layer
Pass through hot pressing cladding.
Embodiment 1
By active catalyst V2O5/TiO2Micro mist presses 5 with PTFE resin:Mixing for 95 ratio uniform, makes respectively
PTFE microporous membranes into the PTFE fiber containing catalyst and containing catalyst；Wherein, the species and quality of auxiliary agent can roots
According to any selection of needs.PTFE fiber containing catalyst is mainly used in making Woven filter cloth, and the PTFE containing catalyst is micro-
The final laminating surface in filtrate of hole film.By way of being implanted into active catalyst in filtrate, reach in filtering smoke
Effect of the harmful substance such as mercury in flue gas and heavy metal is removed simultaneously.Comprise the following steps that：
One is by the PTFE fiber containing catalyst and warping process of the high-strength PTFE fiber before weaving cotton cloth, using 1:1 hands over
Warp beam is made for the mode of arrangement, PTFE base fabrics are weaved into by the way of woven, PTFE base cloth layers 4 are obtained；
Two be by 50 by PPS fibers and the PTFE chopped fibers containing catalyst:After 50 ratio mixing, with PTFE base cloth layers
Together enter needing machine, first is formed in the both sides of PTFE base cloth layers and is catalyzed the catalysis PTFE fibres of PTFE fiber strength layer 3 and second
Strength layer 5 is tieed up, PTFE compound spiked felts are made.
Three be active metal catalyst emulsion and the solid content that solid content is 45% be 45% PTFE emulsion by effectively into
The mass ratio divided is 40:60 are made catalyst mixed treating liquid, and mass-impregnation processing is carried out to PTFE compound spiked felts, pass through
After 280 DEG C of high temperature sinterings, in upper and lower surface the first catalyst mixed treating liquid of formation dipping layer 2 of PTFE compound spiked felts and the
Two catalyst mixed treating liquids impregnate layer 6.
Four be while being introduced into hot laminating machine, table after filtrate mass-impregnation is handled with the PTFE microporous membranes containing catalyst
Face carries out hot pressing overlay film processing, the PTFE microporous membranes containing catalyst is firmly combined together with base material, formation contains
The PTFE microporous film layers 1 of catalyst, are finally made PPS composite felt function filter materials.
Filtering material with demercuration effect is integrally divided into six levels：It is followed successively by by dust-collecting face to net gas face containing catalysis
The PTFE microporous film layers of agent, the first catalyst mixed emulsion impregnation process layer, the first catalysis PTFE fiber strength layer, PTFE bases
Layer of cloth, the second catalysis PTFE fiber strength layer, the second catalyst mixed emulsion impregnation process layer.
Filtering material with demercuration effect, significantly improves the filtering accuracy of filtrate, (dust-collecting face is to only from outside to inside for filtrate
Gas face) multi-level active catalyst distribution layer is formed, when high-temperature flue gas passes through, dust is blocked on the surface of filtrate；Contain
Have the gas of harmful substance by when, the harmful substance such as mercury and heavy metal is reacted with active catalyst, and oxious component is divided
Solve and be collected in the lump for harmless material and dust, so as to realize the double effects of flue gas ash removal and removing harmful substance.
The parameter of filtering material with demercuration effect
Embodiment 2
By active catalyst V2O5-WO3/TiO2Micro mist presses 8 with PTFE resin:Mixing for 92 ratio uniform, divides
The PTFE fiber containing catalyst and the PTFE microporous membranes containing catalyst are not made；Wherein, the species and quality of auxiliary agent can
With any selection as needed.PTFE fiber containing catalyst is mainly used in making Woven filter cloth, contains catalyst
The final laminating surface in filtrate of PTFE microporous membranes.By way of being implanted into active catalyst in filtrate, reach in filtering
Effect of the harmful substance such as mercury in flue gas and heavy metal is removed while flue dust.Comprise the following steps that：
One is by the PTFE fiber containing catalyst and warping process of the high-strength PTFE fiber before weaving cotton cloth, using 1:1 hands over
Warp beam is made for the mode of arrangement, PTFE base fabrics are weaved into by the way of woven, PTFE base cloth layers 4 are obtained；
Two be by 30 by aramid fiber, P84 with the PTFE chopped fibers containing catalyst:After 70 ratio mixing, with PTFE base fabrics
Layer together enters needing machine, and first is formed in the both sides of PTFE base cloth layers and is catalyzed the catalysis PTFE of PTFE fiber strength layer 3 and second
Fibre strength layer 5, is made PTFE compound spiked felts.
Three be active metal catalyst emulsion and the solid content that solid content is 50% be 40% PTFE emulsion by effectively into
The mass ratio divided is 60:40 are made catalyst mixed treating liquid, and mass-impregnation processing is carried out to PTFE compound spiked felts, pass through
After 310 DEG C of high temperature sinterings, in upper and lower surface the first catalyst mixed treating liquid of formation dipping layer 2 of PTFE compound spiked felts and the
Two catalyst mixed treating liquids impregnate layer 6.
Four be while being introduced into hot laminating machine, table after filtrate mass-impregnation is handled with the PTFE microporous membranes containing catalyst
Face carries out hot pressing overlay film processing, the PTFE microporous membranes containing catalyst is firmly combined together with base material, formation contains
The PTFE microporous film layers 1 of catalyst, are finally made PTFE, aramid fiber, P84 composite felt function filter materials.
Filtering material with demercuration effect is integrally divided into six levels：It is followed successively by by dust-collecting face to net gas face containing catalysis
The PTFE microporous film layers of agent, the first catalyst mixed emulsion impregnation process layer, the first catalysis PTFE fiber strength layer, PTFE bases
Layer of cloth, the second catalysis PTFE fiber strength layer, the second catalyst mixed emulsion impregnation process layer.
Filtering material with demercuration effect, significantly improves the filtering accuracy of filtrate, (dust-collecting face is to only from outside to inside for filtrate
Gas face) multi-level active catalyst distribution layer is formed, when high-temperature flue gas passes through, dust is blocked on the surface of filtrate；Contain
Have the gas of harmful substance by when, the harmful substance such as mercury and heavy metal is reacted with active catalyst, and oxious component is divided
Solve and be collected in the lump for harmless material and dust, so as to realize the double effects of flue gas ash removal and removing harmful substance.
Filtering material with demercuration effect
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection of claims
Scope is defined.
Claims (2)
1. a kind of preparation method of the filtering material with demercuration effect, it is characterised in that comprise the following steps：
(1) after active metal catalyst powder is mixed with PTFE resin powder, the PTFE fiber containing catalyst is respectively prepared
With the PTFE microporous membranes containing catalyst；
(2) PTFE fiber containing catalyst and high-strength PTFE fiber are used into 1-10:The mode that 1-10 is alternately arranged be made through
Axle, is weaved by the way of woven and PTFE base cloth layers is made；
(3) needing machine is put into together with PTFE base cloth layers after base material is mixed with the PTFE chopped fibers containing catalyst, in PTFE
The both sides of base cloth layer form catalysis PTFE fiber strength layer, and PTFE compound spiked felts are made；
(4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mixed treating liquid, to PTFE composite acupunctures
Felt carries out mass-impregnation processing, is sintered afterwards at 280-350 DEG C；
(5) the PTFE compound spiked felts after sintering and the PTFE microporous membranes containing catalyst are introduced into hot laminating machine simultaneously,
Surface carries out hot pressing overlay film processing；
Active metal catalyst in the step (1) is V2O5-WO3/TiO2；
The mass ratio of the active ingredient of active metal catalyst emulsion and PTFE emulsion in the step (4) is 1-99:99-1；
The active ingredient of the active metal catalyst emulsion is V2O5/TiO2Or V2O5-WO3/TiO2；Work in the step (1)
Property metal catalyst powder, PTFE resin powder mass ratio be 1~10:99~90；Base material in the step (3) is selected from
One or more in PPS fibers, PTFE fiber, glass, P84, aramid fiber, PSA fiber；Active metal in the step (4) is urged
The solid content of agent emulsion is 40~60%；The solid content of PTFE emulsion in the step (4) is 30~50%.
2. the filtering material with demercuration effect prepared according to the method described in claim 1, it is characterised in that include successively
PTFE microporous film layers containing catalyst, the first catalyst mixed treating liquid dipping layer, PTFE compound spiked felts, the second catalysis
Agent mixed treating liquid impregnates layer；The first catalysis PTFE fiber strength layer that the PTFE compound spiked felts include being sequentially connected,
PTFE base cloth layers, the second catalysis PTFE fiber strength layer；The PTFE microporous film layers and the first catalyst containing catalyst
Pass through hot pressing cladding between mixed treating liquid dipping layer.
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| CN108525514B (en) * | 2018-04-19 | 2021-03-30 | 南京信息工程大学 | Multifunctional filter material with sulfur resistance, water resistance, dust removal, denitration and demercuration functions and preparation method thereof |
| CN112044178B (en) * | 2020-09-29 | 2022-08-30 | 西安热工研究院有限公司 | Demercuration filter bag and preparation method thereof |
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| CN203874574U (en) * | 2014-02-14 | 2014-10-15 | 营口市洪源玻纤科技有限公司 | Glass fiber and PTFE fiber blended filter material |
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| JPH10230119A (en) * | 1996-11-25 | 1998-09-02 | Abb Kk | Bag filter and its manufacture |
| JP2006061796A (en) * | 2004-08-25 | 2006-03-09 | Ambic Co Ltd | Catalytic filter medium |
| CN101357279A (en) * | 2008-06-26 | 2009-02-04 | 南京际华三五二一特种装备有限公司 | Dust removal and dioxin decomposition integration filter material and preparation method thereof |
| CN102512878B (en) * | 2011-12-28 | 2013-10-09 | 南京际华三五二一特种装备有限公司 | Dust removal and waste gas decomposition double-effect filter material and preparation method thereof |
| CN103432827B (en) * | 2013-08-13 | 2015-03-25 | 辽宁省金氟龙环保新材料有限公司 | High-performance PTFE (Polytetrafluoroethylene) needled felt filter material and preparation process thereof |
| CN203944223U (en) * | 2014-05-10 | 2014-11-19 | 湖州科富拉膜技术有限公司 | A kind of composite filter material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081356A (en) * | 2007-07-10 | 2007-12-05 | 浙江理工大学 | Method for preparation of polytetrafluorethylene microporous film for the processing of high-temperature fume and flour dust |
| CN103212290A (en) * | 2013-04-28 | 2013-07-24 | 安徽省利特环保技术有限公司 | Filter bag based on nano catalytic desulfurization technology and preparation method thereof |
| CN203874574U (en) * | 2014-02-14 | 2014-10-15 | 营口市洪源玻纤科技有限公司 | Glass fiber and PTFE fiber blended filter material |
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