CN105013250A - Filtering material possessing desulphurization efficacy and preparation method thereof - Google Patents
Filtering material possessing desulphurization efficacy and preparation method thereof Download PDFInfo
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- CN105013250A CN105013250A CN201510381942.3A CN201510381942A CN105013250A CN 105013250 A CN105013250 A CN 105013250A CN 201510381942 A CN201510381942 A CN 201510381942A CN 105013250 A CN105013250 A CN 105013250A
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Abstract
The invention provides a preparation method of a filtering material possessing desulphurization efficacy, 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 base material and catalyst-containing PTFE fiber are mixed, and then placed in a needle loom with the PTFE base cloth layer to prepare PTFE composite needled felt; 4)an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixing treatment fluid, the PTFE composite needled felt is performed with integral dipping treatment and sintered at temperature of 280-350 DEG C; and 5)the sintered PTFE 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 desulphurization 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 and a kind of there is filtering material of desulfurization effect 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 sulfur dioxide 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.Sulfur dioxide is the topmost gaseous contaminant affecting air quality, is the important symbol whether measurement air is polluted.
Mainly artificially originate in the source of sulfur dioxide: the thermal power plant being fuel with coal and oil, Industrial Boiler, waste incineration, life heating, Diesel engine, metallurgical works, paper mill etc.Atmosphere pollution, particularly sulfur dioxide pollution that China's fire coal brings, cause huge economic loss, had a strong impact on the development of national economy and the normal life of the people.
Sulfur dioxide has very strong toxicity, can cause huge injury to human body; Sulfur dioxide is the main reason of " acid rain " simultaneously, and the preventing and controlling therefore for sulfur dioxide are particularly important.Current flue gas desulfurization reduces most economical, the effective means of sulfur dioxide (SO2) emissions, and what flue gas desulfurization technique was the most frequently used is mutually different according to the thing of operating process, and sulfur method can be divided into wet process of FGD, dry flue gas desulphurization and semi-dry process flue gas desulphurization.Various flue gas desulfurization technique achieves certain economy, society and environmental benefit in the process of scrubbing CO_2, but also comes with some shortcomings, and that is exactly the removal efficiency problem of sulfur dioxide, and the sulfur dioxide in flue gas has certain escape phenomenon.
Environmental benefit and economic benefit consider the Developing mainstream by becoming sulfur dioxide Prevention Technique from now on, investment and operating cost is few, desulfuration efficiency is high, pollute less, the desulfur technology of non-secondary pollution will become the main trend that flue gas desulfurization technique from now on develops.In order to improve the removal efficiency of sulfur dioxide further, by R & D design new type functional Environmental-protecting dust-removing filtering material, in filtrate, implant active catalyst, realize carrying out dedusting simultaneously at high-temperature flue gas, the sulfur dioxide contained is carried out to the object of catalytic decomposition in high-temperature flue gas.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 the sulfur dioxide of desulphurization system remnants can be completed.
Summary of the invention
The object of the invention is to solve the subproblem existed in existing desulfurization filtrate technology, provide a kind of and there is filtering material of desulfurization effect and preparation method thereof.
The object of the invention is to be achieved through the following technical solutions:
There is a preparation method for the filtering material of desulfurization effect, comprise the following steps:
(1), after being mixed with PTFE toner by active metal catalyst powder, 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 base material together with PTFE base cloth layer, form catalysis PTFE fibre strength layer in the both sides of PTFE base cloth layer, make PTFE 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 PTFE compound spiked felt, sinter at 280-350 DEG C afterwards;
(5) introduce in hot laminating machine by the PTFE 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, in described step (1), active metal catalyst is V
2o
5/ TiO
2or V
2o
5-WO
3/ TiO
2.
Preferably, in described step (1), the mass ratio of active metal catalyst powder, PTFE toner is 1 ~ 10:99 ~ 90.
Preferably, the base material in described step (3) be selected from PPS fiber, PTFE fiber, glass, P84, aramid fiber, PSA fiber one or more.
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 active ingredient of described active metal catalyst emulsion is V
2o
5/ TiO
2or V
2o
5-WO
3/ TiO
2
Preferably, the solid content of described active metal catalyst emulsion is 40 ~ 60%.
Preferably, the solid content of described PTFE emulsion is 30 ~ 50%.
According to the filtering material with desulfurization effect prepared by said method, comprise the PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer, PTFE compound spiked felt, the second catalyst mix treatment fluid impregnate layer successively; Described PTFE compound spiked felt comprises the first catalysis PTFE fibre strength layer, PTFE base cloth layer, the second catalysis PTFE fibre strength layer that connect successively; Described containing between the PTFE microporous film layer of catalyst and the first catalyst mix treatment fluid impregnate layer passes through hot pressing cladding.
Beneficial effect of the present invention:
(1) filtering material with desulfurization effect of the present invention 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 remaining sulfur dioxide; 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) filtering material with desulfurization effect of the present invention has effect of surface filtration simultaneously, dust is trapped in the surface of filtrate, can realizes the near-zero release that Dust Capacity is less than 5mg/Nm3;
(3) filtering material with desulfurization effect of the present invention 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 sulfur dioxide; 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 sulfur dioxide simultaneously;
(5) the filtering material heat resistance with desulfurization effect of the present invention is outstanding, can continuous operation temperature 200 DEG C, moment heatproof can reach 220 DEG C.
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 preparation method with the filtering material of desulfurization effect, comprise the following steps: after active metal catalyst powder mixes with PTFE toner by (1), make 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 base material together with PTFE base cloth layer, form catalysis PTFE fibre strength layer in the both sides of PTFE base cloth layer, make PTFE 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 PTFE compound spiked felt, sinter at 280-350 DEG C afterwards; (5) introduce in hot laminating machine by the PTFE 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.In described step (1), active metal catalyst is V
2o
5/ TiO
2or V
2o
5-WO
3/ TiO
2.In described step (1), the mass ratio of active metal catalyst powder, PTFE toner is 1 ~ 10:99 ~ 90.Base material in described step (3) be selected from PPS fiber, PTFE fiber, glass, P84, aramid fiber, PSA fiber one or more.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 active ingredient of described active metal catalyst emulsion is V
2o
5/ TiO
2or V
2o
5-WO
3/ TiO
2.The solid content of described active metal catalyst emulsion is 40 ~ 60%.The solid content of described PTFE emulsion is 30 ~ 50%.
According to the filtering material with desulfurization effect prepared by said method, comprise the PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer, PTFE compound spiked felt, the second catalyst mix treatment fluid impregnate layer successively; Described PTFE compound spiked felt comprises the first catalysis PTFE fibre strength layer, PTFE base cloth layer, the second catalysis PTFE fibre strength layer that connect successively; Described containing between the PTFE microporous film layer of catalyst and 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 5:95, 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, reach the effect removing the harmful substances such as sulfur dioxide in flue gas 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 the first catalysis PTFE fibre strength layer 3 and the second catalysis PTFE fibre strength layer 5 in the both sides of PTFE base cloth layer, make PTFE compound spiked felt.
Three is solid contents be 45% active metal catalyst emulsion and solid content be 45% 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 PTFE 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 PTFE 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 containing catalyst and base material are firmly combined, form the PTFE microporous film layer 1 containing catalyst, finally make PPS composite felt function filter material.
The filtering material entirety with desulfurization effect is divided into six levels: to be followed successively by the PTFE microporous film layer containing catalyst to pure qi (oxygen) face by dust-collecting face, first catalyst mix emulsion impregnation process layer, first catalysis PTFE fibre strength layer, PTFE base cloth layer, second catalysis PTFE fibre strength layer, the second catalyst mix emulsion impregnation process layer.
Have the filtering material of desulfurization effect, 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, the harmful substances such as sulfur dioxide and active catalyst react, and oxious component is broken down into harmless material and dust is collected in the lump, thus realize flue gas ash removal and the double effects removing harmful substance.
There is the parameter of the filtering material of desulfurization effect
Embodiment 2
By active catalyst V
2o
5-WO
3/ TiO
2micro mist and PTFE resin, by the mixing of ratio uniform of 8:92, 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, reach the effect removing the harmful substances such as sulfur dioxide in flue gas 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 aramid fiber, P84 being mixed in the ratio of 30:70 with the PTFE short fiber containing catalyst, together needing machine is entered with PTFE base cloth layer, form the first catalysis PTFE fibre strength layer 3 and the second catalysis PTFE fibre strength layer 5 in the both sides of PTFE base cloth layer, make PTFE compound spiked felt.
Three is solid contents be 50% active metal catalyst emulsion and solid content be 40% PTFE emulsion be that 60:40 makes catalyst mix treatment fluid by the mass ratio of active ingredient, mass-impregnation process is carried out to PTFE 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 PTFE 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 containing catalyst and base material are firmly combined, form the PTFE microporous film layer 1 containing catalyst, finally make PPS composite felt function filter material.
The filtering material entirety with desulfurization effect is divided into six levels: to be followed successively by the PTFE microporous film layer containing catalyst to pure qi (oxygen) face by dust-collecting face, first catalyst mix emulsion impregnation process layer, first catalysis PTFE fibre strength layer, PTFE base cloth layer, second catalysis PTFE fibre strength layer, the second catalyst mix emulsion impregnation process layer.
Have the filtering material of desulfurization effect, 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, the harmful substances such as sulfur dioxide and active catalyst react, and oxious component is broken down into harmless material and dust is collected in the lump, thus realize flue gas ash removal and the double effects removing harmful substance.
There is the filtering material of desulfurization effect
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. there is a preparation method for the filtering material of desulfurization effect, it is characterized in that, comprise the following steps:
(1), after being mixed with PTFE toner by active metal catalyst powder, 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 base material together with PTFE base cloth layer, form catalysis PTFE fibre strength layer in the both sides of PTFE base cloth layer, make PTFE 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 PTFE compound spiked felt, sinter at 280-350 DEG C afterwards;
(5) introduce in hot laminating machine by the PTFE 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 V
2o
5/ TiO
2or V
2o
5-WO
3/ TiO
2.
3. preparation method according to claim 1, is characterized in that, the active metal catalyst powder in described step (1), the mass ratio of PTFE toner are 1 ~ 10:99 ~ 90.
4. preparation method according to claim 1, is characterized in that, the base material in described step (3) be selected from PPS fiber, PTFE fiber, glass, P84, aramid fiber, PSA fiber one or more.
5. preparation method according to claim 1, is characterized in that, the mass ratio of the active metal catalyst emulsion in described step (4) and the active ingredient of PTFE emulsion is 1-99:99-1.
6. preparation method according to claim 5, is characterized in that, the active ingredient of described active metal catalyst emulsion is V
2o
5/ TiO
2or V
2o
5-WO
3/ TiO
2.
7. preparation method according to claim 5, is characterized in that, the solid content of described active metal catalyst emulsion is 40 ~ 60%.
8. preparation method according to claim 5, is characterized in that, the solid content of described PTFE emulsion is 30 ~ 50%.
9. according to the filtering material with desulfurization effect prepared by the arbitrary described method of claim 1-8, it is characterized in that, comprise the PTFE microporous film layer containing catalyst, the first catalyst mix treatment fluid impregnate layer, PTFE compound spiked felt, the second catalyst mix treatment fluid impregnate layer successively; Described PTFE compound spiked felt comprises the first catalysis PTFE fibre strength layer, PTFE base cloth layer, the second catalysis PTFE fibre strength layer that connect successively; Described containing between the PTFE microporous film layer of catalyst and the first catalyst mix treatment fluid impregnate layer passes through hot pressing cladding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105013250B (en) | 2017-08-01 |
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Effective date of registration: 20180608 Address after: 115004 No. 101, Zhi Xin Street West, Xishi District, Yingkou, Liaoning Patentee after: Liaoning Xin Hongyuan environmental protection material Co. Ltd. Address before: No. 8, Tashan Road, Kecheng District, Quzhou, Zhejiang Patentee before: Zhejiang Hongsheng Environmental Protection Technology Co. Ltd. |