CN105013249A - Nitre and dioxin-removal PPS composite felt functional filtering material and preparation method thereof - Google Patents
Nitre and dioxin-removal PPS composite felt functional filtering material and preparation method thereof Download PDFInfo
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- CN105013249A CN105013249A CN201510381907.1A CN201510381907A CN105013249A CN 105013249 A CN105013249 A CN 105013249A CN 201510381907 A CN201510381907 A CN 201510381907A CN 105013249 A CN105013249 A CN 105013249A
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Abstract
The invention provides a preparation method of a nitre and dioxin-removal PPS composite felt functional filtering material, which comprises the following steps: 1)active metal catalyst powder and PTFE resin powder are mixed and respectively prepared to catalyst-containing PTFE fiber and catalyst-containing PTFE micropore film; 2) catalyst-containing PTFE fiber and high-strength PTFE fiber employs an alternative arrangement mode with 1-10: 1-10 to prepare warp beam, a PTFE base cloth layer is prepared by employing a machine knitting mode; 3)the PPS fiber and catalyst-containing PTFE short fiber are mixed, and then placed in a needle loom with the PTFE base cloth layer to prepare PPS composite needled felt; 4)an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixing treatment fluid, the PPS composite needled felt is performed with integral dipping treatment and sintered at temperature of 280-350 DEG C; and 5)the sintered PPS composite needled felt and the catalyst-containing PTFE micropore film are simultaneously introduced into a heat film covering machine, and the surface is performed with hot pressing and laminating. According to the invention, filtration accuracy as well as nitre and dioxin-removal efficiency can be greatly increased.
Description
Technical field
The present invention relates to Environmental-protecting dust-removing filed of flue gas purification, particularly relate to a kind of denitration with PPS composite felt function filter material of bioxin and preparation method thereof.
Background technology
At present, along with the fast development of economy, the discharge of industrial waste gas sharply increases.The pollution of China's atmospheric environment is on the rise, and progressively pollutes transformation by coal-smoke pollution to mixed type, and flue dust, SOx, NOx, Hg total emission volumn rank first in the world.Wherein nitrogen oxide, bioxin is one of major pollutants in air, and discharge capacity exceedes the self-purification ability of enviroment, endangers huge, and environmental aspect situation is very severe.Nitrogen oxide, bioxin is the topmost gaseous contaminant affecting air quality, is the important symbol whether measurement air is polluted.
Coal-burning power plant and garbage burning factory are the rich anies influential family of SOx and NOx emission, and the pollutant produced in flue gas comprises oxysulfide, nitrogen oxide, dust, the pellet (harmful substance such as IP), dioxin (PCDD/Fs), heavy metal.At present, nitrogen oxide becomes first pollutant acid gas gradually, the water of nitrogen oxide in air is combined and finally can changes into nitric acid and nitrate, nitric acid is one of origin cause of formation of acid rain, it and other pollutants can produce photochemical pollution under certain condition, and serious environment pollution also jeopardizes health.Bioxin is that a class source is wide, strong toxicity, the organic pollution that stability is high.It is the general designation of Duo chlorodiphenyl Bing bioxin and polychlorinated dibenzo, and the former is 75 kinds, the latter 135 kinds, totally 210 homologs.These compounds main have strongly carcinogenic, teratogenesis, mutagenic feature.Due to bioxin stability and be soluble in the characteristic of grease, be just difficult to discharge once enter human body, long term accumulation, will permanent destruction human body immune system and upset the hormone secretion of human body, great bodily injury is formed to human body.
The environmental problem that the harmful substances such as nitrogen oxide, bioxin cause and huge to the harm of health.Although, research and develop various denitrating flue gas both at home and abroad, removed the techniques such as bioxin, had their own characteristics each, and achieve certain achievement, but the common removal efficiency problem that there is a harmful substance, the harmful substances such as the nitrogen oxide, bioxin in flue gas have certain escape phenomenon.
Environmental benefit and economic benefit consider the Developing mainstream by becoming the harmful substance Prevention Technique such as nitrogen oxide, bioxin from now on.In order to improve the removal efficiency of harmful substance further, by R & D design new type functional Environmental-protecting dust-removing filtering material, active catalyst is implanted in filtrate, realize carrying out dedusting simultaneously at high-temperature flue gas, the poisonous and harmful substances such as the nitrogen oxide, bioxin contained in high-temperature flue gas are carried out to the object of catalytic decomposition.Therefore, in original Environmental-protecting dust-removing system, without the need to changing existing process equipment and working condition, the catalytic decomposition of the harmful substances such as residual nitrogen oxide, bioxin can be completed.
Summary of the invention
The subproblem that the object of the invention is to solve existing denitration He exist in bioxin filtrate technology, provides a kind of denitration with PPS composite felt function filter material of bioxin and preparation method thereof.
The object of the invention is to be achieved through the following technical solutions:
Denitration, with the preparation method of PPS composite felt function filter material for bioxin, comprises the following steps:
(1) by after the mixing of active metal catalyst powder and PTFE mixed with resin, the PTFE fiber containing catalyst and the PTFE microporous membrane containing catalyst is made respectively;
(2) mode that the PTFE fiber containing catalyst and high-strength PTFE fiber adopt 1-10:1-10 alternately to arrange is made warp beam, adopt woven mode to weave and make PTFE base cloth layer;
(3) put into needing machine after being mixed with the PTFE short fiber containing catalyst by PPS fiber together with PTFE base cloth layer, form PPS+ catalysis PTFE fibre strength layer in the both sides of PTFE base cloth layer, make PPS compound spiked felt;
(4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mix treatment fluid, mass-impregnation process is carried out to PPS compound spiked felt, sinter at 280-350 DEG C afterwards;
(5) introduce in hot laminating machine by the PPS compound spiked felt after sintering and the PTFE microporous membrane containing catalyst, the processing of hot pressing overlay film is carried out on surface simultaneously.
Preferably, the active metal catalyst in described step (1) is selected from V
2o
5, WO
3, MoO
3/ TiO
2in one or more.
Preferably, in described step (1), the mass ratio of active metal catalyst powder, PTFE toner is 1-10:99-90.
Preferably, in described step (3), PPS fiber is 1-99:99-1 with the ratio of the PTFE short fiber containing catalyst.
Preferably, in described step (4), the mass ratio of the active ingredient of active metal catalyst emulsion and PTFE emulsion is 1-99:99-1.
Preferably, the solid content of described PTFE emulsion is 30 ~ 50%.
Preferably, the active ingredient of described active metal catalyst emulsion is V
2o
5, WO
3, MoO
3/ TiO
2in one or more.
Preferably, the solid content of described active metal catalyst emulsion is 40 ~ 60%.
The denitration prepared according to said method, with the PPS composite felt function filter material of bioxin, comprises the PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer, PPS compound spiked felt, the second catalyst mix treatment fluid impregnate layer successively; Described PPS compound spiked felt comprises the PPS+ catalysis PTFE fibre strength layer, PTFE base cloth layer, the 2nd PPS+ catalysis PTFE fibre strength layer that connect successively; Between the described PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer passes through hot pressing cladding.
Beneficial effect of the present invention:
(1) denitration of the present invention is with the PPS composite felt function filter material of bioxin has applicable working condition scope extensively, without the need to changing original process equipment and working condition, can complete the catalytic decomposition of the harmful substances such as residual nitrogen oxide, bioxin; System cloud gray model 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) denitration of the present invention is with the PPS composite felt function filter material of bioxin has effect of surface filtration simultaneously, dust is trapped in the surface of filtrate, can realizes Dust Capacity and be less than 5mg/Nm
3near-zero release;
(3) denitration of the present invention is with the PPS composite felt function filter material of bioxin is while filtrating smoke dust, due to the introducing of multi-level catalyst distribution layer, promote the contact area of waste gas and catalyst at double, significantly improve the catalytic decomposition efficiency to harmful substances such as nitrogen oxide, bioxin; Give full play to the function that filtrate removes harmful substance;
(4) adopt superfine glass fiber and catalysis PTFE fiber to make base material, ensure that filtrate entirety has higher hot strength, there is the catalytic decomposition function of the harmful substances such as nitrogen oxide, bioxin simultaneously;
(5) high accuracy PPS composite felt function filter material heat resistance of the present invention is outstanding.Continuous operation temperature 200 DEG C, heatproof can reach 220 DEG C instantaneously, meets the temperature conditions of harmful substance and the double requirements of life of bag filter such as catalyst decomposes nitrogen oxide, bioxin.
Accompanying drawing explanation
Fig. 1 is the structural representation of filtrate of the present invention.
Detailed description of the invention
In order to better the present invention is described, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
A kind of denitration is with the preparation method of PPS composite felt function filter material of bioxin, comprise the following steps: (1), by after the mixing of active metal catalyst powder and PTFE mixed with resin, makes the PTFE fiber containing catalyst and the PTFE microporous membrane containing catalyst respectively; (2) mode that the PTFE fiber containing catalyst and high-strength PTFE fiber adopt 1-10:1-10 alternately to arrange is made warp beam, adopt woven mode to weave and make PTFE base cloth layer; (3) put into needing machine after being mixed with the PTFE short fiber containing catalyst by PPS fiber together with PTFE base cloth layer, form PPS+ catalysis PTFE fibre strength layer in the both sides of PTFE base cloth layer, make PPS compound spiked felt; (4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mix treatment fluid, mass-impregnation process is carried out to PPS compound spiked felt, sinter at 280-350 DEG C afterwards; (5) introduce in hot laminating machine by the PPS compound spiked felt after sintering and the PTFE microporous membrane containing catalyst, the processing of hot pressing overlay film is carried out on surface simultaneously.Active metal catalyst in described step (1) is selected from V
2o
5, WO
3, MoO
3/ TiO
2in one or more.In described step (1), the mass ratio of active metal catalyst powder, PTFE toner is 1-10:99-90.In described step (3), PPS fiber is 1-99:99-1 with the ratio of the PTFE short fiber containing catalyst.In described step (4), the mass ratio of the active ingredient of active metal catalyst emulsion and PTFE emulsion is 1-99:99-1.The solid content of described PTFE emulsion is 30 ~ 50%.The active ingredient of described active metal catalyst emulsion is V
2o
5, WO
3, MoO
3/ TiO
2in one or more.The solid content of described active metal catalyst emulsion is 40 ~ 60%.
The denitration prepared according to said method, with the PPS composite felt function filter material of bioxin, comprises the PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer, PPS compound spiked felt, the second catalyst mix treatment fluid impregnate layer successively; Described PPS compound spiked felt comprises the PPS+ catalysis PTFE fibre strength layer, PTFE base cloth layer, the 2nd PPS+ catalysis PTFE fibre strength layer that connect successively; Between the described PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer passes through hot pressing cladding.
Embodiment 1
By active catalyst V
2o
5/ TiO
2micro mist and PTFE resin, by the mixing of ratio uniform of 2:98, make the PTFE fiber containing catalyst and the PTFE microporous membrane containing catalyst respectively; Wherein, the kind of auxiliary agent and quality can be selected arbitrarily as required.PTFE fiber containing catalyst is mainly used in making Woven filter cloth, and the PTFE microporous membrane containing catalyst is the laminating surface at filtrate finally.By implanting the mode of active catalyst in filtrate, reaching and removing nitrogen oxides in effluent with effect of the harmful substances such as bioxin while filtering smoke.Concrete steps are as follows:
One is the warping process before weaving cotton cloth by the PTFE fiber containing catalyst and high-strength PTFE fiber, and the mode adopting 1:1 alternately to arrange makes warp beam, adopts woven mode to be woven into PTFE base cloth, obtains PTFE base cloth layer 4;
Two is after being mixed in the ratio of 50:50 with the PTFE short fiber containing catalyst by PPS fiber, together needing machine is entered with PTFE base cloth layer, form PPS+ catalysis PTFE fibre strength layer 3 and a 2nd PPS+ catalysis PTFE fibre strength layer 5 in the both sides of PTFE base cloth layer, make PPS compound spiked felt.
Three be by solid content be 50% active metal catalyst emulsion and solid content be 40% PTFE emulsion be that 40:60 makes catalyst mix treatment fluid by the mass ratio of active ingredient, mass-impregnation process is carried out to PPS compound spiked felt, after 280 DEG C of high temperature sinterings, form the first catalyst mix treatment fluid impregnate layer 2 and the second catalyst mix treatment fluid impregnate layer 6 in the upper and lower surface of PPS compound spiked felt.
Four is introduce in hot laminating machine with the PTFE microporous membrane containing catalyst after the process of filtrate mass-impregnation simultaneously, the processing of hot pressing overlay film is carried out on surface, PTFE microporous membrane 1 containing catalyst is firmly combined with base material, finally makes PPS composite felt function filter material.
Denitration is with the PPS composite felt function filter material entirety of bioxin is divided into six levels: to be followed successively by the PTFE microporous film layer 1 containing catalyst to pure qi (oxygen) face by dust-collecting face, first catalyst mix emulsion impregnation process layer 2, one PPS+ catalysis PTFE fibre strength layer 3, PTFE base cloth layer 4,2nd PPS+ catalysis PTFE fibre strength layer 5, second catalyst mix emulsion impregnation process layer 6.
Denitration is with the PPS composite felt function filter material of bioxin, significantly improve the filtering accuracy of filtrate, filtrate from outside to inside (dust-collecting face is to pure qi (oxygen) face) forms multi-level active catalyst distribution layer, and when high-temperature flue gas is through out-of-date, dust is blocked on the surface of filtrate; When gas containing harmful substance passes through, nitrogen oxide is with the harmful substances such as bioxin and active catalyst react, and oxious component is broken down into harmless material and dust is collected in the lump, thus realizes flue gas ash removal and the double effects removing harmful substance.
Denitration is with the parameter of PPS composite felt function filter material of bioxin
Embodiment 2
By active catalyst V
2o
5-WO
3/ TiO
2micro mist and PTFE resin, by the mixing of ratio uniform of 10:90, make the PTFE fiber containing catalyst and the PTFE microporous membrane containing catalyst respectively; Wherein, the kind of auxiliary agent and quality can be selected arbitrarily as required.PTFE fiber containing catalyst is mainly used in making Woven filter cloth, and the PTFE microporous membrane containing catalyst is the laminating surface at filtrate finally.By implanting the mode of active catalyst in filtrate, reaching and removing nitrogen oxides in effluent with effect of the harmful substances such as bioxin while filtering smoke.Concrete steps are as follows:
One is the warping process before weaving cotton cloth by the PTFE fiber containing catalyst and high-strength PTFE fiber, and the mode adopting 1:2 alternately to arrange makes warp beam, adopts woven mode to be woven into PTFE base cloth, obtains PTFE base cloth layer 4;
Two is after being mixed in the ratio of 30:70 with the PTFE short fiber containing catalyst by PPS fiber, together needing machine is entered with PTFE base cloth layer, form PPS+ catalysis PTFE fibre strength layer 3 and a 2nd PPS+ catalysis PTFE fibre strength layer 5 in the both sides of PTFE base cloth layer, make PPS compound spiked felt.
Three be by solid content be 45% active metal catalyst emulsion and solid content be 45% PTFE emulsion be that 50:50 makes catalyst mix treatment fluid by the mass ratio of active ingredient, mass-impregnation process is carried out to PPS compound spiked felt, after 310 DEG C of high temperature sinterings, form the first catalyst mix treatment fluid impregnate layer 2 and the second catalyst mix treatment fluid impregnate layer 6 in the upper and lower surface of PPS compound spiked felt.
Four is introduce in hot laminating machine with the PTFE microporous membrane containing catalyst after the process of filtrate mass-impregnation simultaneously, the processing of hot pressing overlay film is carried out on surface, PTFE microporous membrane 1 containing catalyst is firmly combined with base material, finally makes PPS composite felt function filter material.
Denitration is with the PPS composite felt function filter material entirety of bioxin is divided into six levels: to be followed successively by the PTFE microporous film layer 1 containing catalyst to pure qi (oxygen) face by dust-collecting face, first catalyst mix emulsion impregnation process layer 2, one PPS+ catalysis PTFE fibre strength layer 3, PTFE base cloth layer 4,2nd PPS+ catalysis PTFE fibre strength layer 5, second catalyst mix emulsion impregnation process layer 6.
Denitration is with the PPS composite felt function filter material of bioxin, significantly improve the filtering accuracy of filtrate, filtrate from outside to inside (dust-collecting face is to pure qi (oxygen) face) forms multi-level active catalyst distribution layer, and when high-temperature flue gas is through out-of-date, dust is blocked on the surface of filtrate; When gas containing harmful substance passes through, nitrogen oxide is with the harmful substances such as bioxin and active catalyst react, and oxious component is broken down into harmless material and dust is collected in the lump, thus realizes flue gas ash removal and the double effects removing harmful substance.
Denitration is with the PPS composite felt function filter material of bioxin
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (9)
1. a preparation method for the PPS composite felt function filter material of denitration and bioxin, is characterized in that, comprise the following steps:
(1) by after the mixing of active metal catalyst powder and PTFE mixed with resin, the PTFE fiber containing catalyst and the PTFE microporous membrane containing catalyst is made respectively;
(2) mode that the PTFE fiber containing catalyst and high-strength PTFE fiber adopt 1-10:1-10 alternately to arrange is made warp beam, adopt woven mode to weave and make PTFE base cloth layer;
(3) put into needing machine after being mixed with the PTFE short fiber containing catalyst by PPS fiber together with PTFE base cloth layer, form PPS+ catalysis PTFE fibre strength layer in the both sides of PTFE base cloth layer, make PPS compound spiked felt;
(4) active metal catalyst emulsion and PTFE emulsion are mixed and made into catalyst mix treatment fluid, mass-impregnation process is carried out to PPS compound spiked felt, sinter at 280-350 DEG C afterwards;
(5) introduce in hot laminating machine by the PPS compound spiked felt after sintering and the PTFE microporous membrane containing catalyst, the processing of hot pressing overlay film is carried out on surface simultaneously.
2. preparation method according to claim 1, is characterized in that, the active metal catalyst in described step (1) is selected from V
2o
5, WO
3, MoO
3/ TiO
2in one or more.
3. preparation method according to claim 1, is characterized in that, in described step (1), the mass ratio of active metal catalyst powder, PTFE toner is 1-10:99-90.
4. preparation method according to claim 1, is characterized in that, in described step (3), PPS fiber is 1-99:99-1 with the ratio of the PTFE short fiber containing catalyst.
5. preparation method according to claim 1, is characterized in that, in described step (4), the mass ratio of the active ingredient of active metal catalyst emulsion and PTFE emulsion is 1-99:99-1.
6. preparation method according to claim 5, is characterized in that, the solid content of described PTFE emulsion is 30 ~ 50%.
7. preparation method according to claim 5, is characterized in that, the active ingredient of described active metal catalyst emulsion is V
2o
5, WO
3, MoO
3/ TiO
2in one or more.
8. preparation method according to claim 5, is characterized in that, the solid content of described active metal catalyst emulsion is 40 ~ 60%.
9. the denitration prepared according to the arbitrary described method of claim 1-8 is with the PPS composite felt function filter material of bioxin, it is characterized in that, comprise the PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer, PPS compound spiked felt, the second catalyst mix treatment fluid impregnate layer successively; Described PPS compound spiked felt comprises the PPS+ catalysis PTFE fibre strength layer, PTFE base cloth layer, the 2nd PPS+ catalysis PTFE fibre strength layer that connect successively; Between the described PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer passes through hot pressing cladding.
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