CN111068417B - A fabric-reinforced high-silica fiber filter tube and preparation method thereof - Google Patents
A fabric-reinforced high-silica fiber filter tube and preparation method thereof Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims abstract description 124
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims description 4
- 239000000919 ceramic Substances 0.000 claims abstract description 41
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 18
- 230000023556 desulfurization Effects 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000009775 high-speed stirring Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 20
- 238000009941 weaving Methods 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
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- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Materials (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
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Abstract
本发明公开了一种织物增强型高硅氧纤维滤管，其特征在于，包括采用耐高温的高硅氧纤维编织成栅格结构形成栅格圆筒，栅格圆筒内层为高硅氧短纤维涂层，栅格圆筒外层为陶瓷短纤维涂层。所述高硅氧短纤维涂层还可以附着有脱硫脱硝催化剂。本发明利用可编织耐高温的高硅氧纤维编织增强栅格布，大大提高了纤维滤管的力学强度，减少了纤维滤管断裂。此外通过里外两侧纤维结构，分别重点应对除尘和脱硫脱硝设置，具有效率高，良好的耐温性和往复性好，使用寿命长等特点。
The invention discloses a fabric-enhanced high-silica fiber filter tube, which is characterized in that a grid cylinder is formed by weaving high-temperature resistant high-silica fibers into a grid structure, and the inner layer of the grid cylinder is made of high-silica fibers. Short fiber coating, the outer layer of the grid cylinder is ceramic short fiber coating. The high silica short fiber coating can also be attached with a desulfurization and denitration catalyst. The invention utilizes high-silica fibers that can be weaved and can be woven to strengthen the grid cloth, thereby greatly improving the mechanical strength of the fiber filter tube and reducing the breakage of the fiber filter tube. In addition, through the fiber structure on both sides of the inner and outer sides, the dust removal and desulfurization and denitrification settings are respectively focused on, which has the characteristics of high efficiency, good temperature resistance and reciprocation, and long service life.
Description
技术领域technical field
本发明涉及一种冶金、建材、玻璃、水泥等工厂用烟气除尘脱硝高硅氧纤维滤管，属于烟气处理过滤设备技术领域。The invention relates to a flue gas dust removal and denitration high silica fiber filter tube for metallurgy, building materials, glass, cement and other factories, and belongs to the technical field of flue gas treatment and filtering equipment.
背景技术Background technique
随着节能环保的需求，目前对工业排放的烟气要求越来越高。不仅对固体粉尘，而且对烟气中的硫化物和氮氧化物浓度都有明确的限定指标。如发电厂要求排放的烟尘中，GB13223-2011新标准规定新建燃煤电厂中烟尘排放低于30mg/m3，SO2的排放限值为100mg/m3，NOx的排放限值为100mg/m3。其它工业如冶金、化工、建材、玻璃、水泥等行业也有类似的要求。因此脱硫脱硝除尘工艺都是必不可少的。由于常规的除尘袋不能承受高温，因此目前常规的做法是在高温下直接脱硫脱硝后，再进行除尘。在所有导致SCR催化剂失活的因素当中，烟气中积灰是最复杂、影响最大的一个。如果催化剂的微孔被烟尘颗粒堵塞，则催化剂表面活性位逐渐丧失，导致催化剂失活，因此在脱硫脱硝过程中，烟气中的烟尘对脱硫脱硝的催化剂有较大的影响，降低了其催化效果。因此如果能在脱硫脱硝之前进行除尘，将大大提高脱硫脱硝的效率，并降低脱硫脱硝催化剂的使用量，减少企业的环保压力。With the demand for energy saving and environmental protection, the current requirements for industrial flue gas are getting higher and higher. Not only for solid dust, but also for the concentration of sulfide and nitrogen oxides in flue gas has a clear limit index. For example, in the smoke and dust required by power plants, the new standard GB13223-2011 stipulates that the smoke and dust emissions from newly built coal-fired power plants are lower than 30mg/m 3 , the emission limit of SO 2 is 100mg/m 3 , and the emission limit of NO x is 100mg/
常规的除尘利用纤维滤袋，其耐高温性能差，耐久性差，特别是密封缝接口处在正压反吹过程中容易损坏。Conventional dust removal uses fiber filter bags, which have poor high temperature resistance and poor durability, especially the sealing seam interface is easily damaged during the positive pressure back blowing process.
公开号为CN 105107310 B的专利介绍了一种催化陶瓷滤管及制备方法，该发明阐述了一种催化陶瓷滤管，其特征在于陶瓷过滤管基体，以及在陶瓷过滤管基体上依次涂覆的催化活性组分层和分离膜。Patent Publication No. CN 105107310 B introduces a catalytic ceramic filter tube and a preparation method. The invention describes a catalytic ceramic filter tube, which is characterized by a ceramic Catalytically active component layers and separation membranes.
而CN201820025113描述的一种改良的陶瓷纤维滤管结构，该专利主要描述的一种改良的陶瓷纤维滤管结构，其基体是陶瓷纤维，陶瓷纤维俗称硅酸铝纤维。While CN201820025113 describes an improved ceramic fiber filter tube structure, the patent mainly describes an improved ceramic fiber filter tube structure, the matrix of which is ceramic fiber, and the ceramic fiber is commonly known as aluminosilicate fiber.
目前已知的陶瓷滤筒都是利用陶瓷纤维制备而成，因此都有强度低，易断管的缺点。而且陶瓷纤维都是短纤维，不能编织成织物进行高温增强。而陶瓷纤维滤筒的断裂基本宣告整套设备的失效，因此大大影响了实际应用效果。此外该产品为单一陶瓷纤维结构产品，不能有效对待大颗粒的灰尘以及小颗粒氮氧化物，效率较低。The known ceramic filter cartridges are all made of ceramic fibers, so they all have the disadvantages of low strength and easy pipe breakage. Moreover, ceramic fibers are short fibers and cannot be woven into fabrics for high temperature reinforcement. The fracture of the ceramic fiber filter cartridge basically announces the failure of the entire set of equipment, thus greatly affecting the actual application effect. In addition, the product is a single ceramic fiber structure product, which cannot effectively treat large particles of dust and small particles of nitrogen oxides, and has low efficiency.
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题是：提供一种内部织物增强结构的耐高温高硅氧纤维滤筒，能大大增强纤维滤筒高温的力学强度；并利用里外两种纤维结构，实现阶梯除尘脱硝，外层利用较粗陶瓷纤维阻挡大颗粒灰尘，并不容易堵死，而里层主要用于附着脱硫脱硝催化剂，提高催化剂的脱硝效果。The technical problem to be solved by the present invention is: to provide a high temperature resistant and high silica fiber filter cartridge with an internal fabric reinforced structure, which can greatly enhance the mechanical strength of the fiber filter cartridge at high temperature; The outer layer uses thicker ceramic fibers to block large particles of dust, which is not easy to block, while the inner layer is mainly used to attach desulfurization and denitration catalysts to improve the denitration effect of the catalyst.
为了解决上述技术问题，本发明提供了一种织物增强型高硅氧纤维滤管，其特征在于，包括采用耐高温的高硅氧纤维编织成栅格结构形成栅格圆筒，栅格圆筒内层为高硅氧短纤维涂层，栅格圆筒外层为陶瓷短纤维涂层。In order to solve the above-mentioned technical problems, the present invention provides a fabric-reinforced high-silica fiber filter tube, which is characterized in that the grid cylinder is formed by weaving high-temperature resistant high-silica fibers into a grid structure to form a grid cylinder. The inner layer is a high silica short fiber coating, and the outer layer of the grid cylinder is a ceramic short fiber coating.
优选地，所述高硅氧短纤维涂层附着有脱硫脱硝催化剂。Preferably, a desulfurization and denitration catalyst is attached to the high silica short fiber coating.
本发明还提供了上述织物增强型高硅氧纤维滤管的制备方法，其特征在于，包括以下步骤：The present invention also provides a method for preparing the above-mentioned fabric-reinforced high-silica fiber filter tube, which is characterized by comprising the following steps:
步骤1)：分别将高硅氧纤维和陶瓷纤维短切后，在球磨罐中球磨2-6h；Step 1): after the high silica fiber and ceramic fiber are chopped, respectively, ball-milled in a ball-milling tank for 2-6h;
步骤2)：将磨好的高硅氧纤维和陶瓷纤维过滤，去除底部的渣球及夹杂物，得到长度为30～300μm的高硅氧短纤维粉末和陶瓷短纤维粉末；Step 2): filtering the ground high-silica fibers and ceramic fibers to remove the slag balls and inclusions at the bottom to obtain high-silica short fiber powder and ceramic short fiber powder with a length of 30-300 μm;
步骤3)：分别将质量分数为5～10wt.％高硅氧短纤维粉末和陶瓷短纤维粉末，加上0.2wt.％～1wt.％无机粘结剂加入到去离子水中，配制成两种独立的浆液中，在高速搅拌状态下混合制备成均匀的高硅氧短纤维料浆和陶瓷短纤维浆料；Step 3): respectively adding the mass fraction of 5-10wt.% high silica short fiber powder and ceramic short fiber powder, plus 0.2wt.%-1wt.% inorganic binder into deionized water to prepare two kinds of powders. In the independent slurry, mixed under high-speed stirring to prepare uniform high-silica short fiber slurry and ceramic short fiber slurry;
步骤4)：先利用编织好的高硅氧纤维栅格圆筒，然后里面衬托内芯模具，采用喷涂法，先在栅格圆筒外层喷涂陶瓷短纤维浆料，采用上下多层往返喷涂，直到纤维框架外层形成0.1-0.3cm的陶瓷短纤维涂层；Step 4): First use the woven high silica fiber grid cylinder, and then use the spraying method to set off the inner core mold. First, spray the ceramic short fiber slurry on the outer layer of the grid cylinder, and use the upper and lower multi-layer reciprocating spraying , until the outer layer of the fiber frame forms a ceramic short fiber coating of 0.1-0.3 cm;
步骤5)：利用内喷管，在纤维框架内侧，喷涂高硅氧短纤维浆料，喷涂方式采用上下多层往返喷涂，直到栅格圆筒内层形成0.1-0.3cm的高硅氧短纤维涂层，得到具有内外涂层的织物增强型高硅氧纤维滤管雏形；Step 5): Use the inner nozzle to spray the high-silica short fiber slurry on the inside of the fiber frame. Coating to obtain a fabric-reinforced high-silica fiber filter tube prototype with inner and outer coatings;
步骤6)：利用外层模具和内芯模具将具有内外涂层的织物增强型高硅氧纤维滤管雏形固定，再根据设计厚度计算分别在里层外层注射相对应的浆料，抽滤成型，排除水分，再将抽滤成型的湿坯脱模干燥，得到织物增强型高硅氧纤维滤管。Step 6): Use the outer layer mold and the inner core mold to fix the prototype of the fabric-reinforced high-silica fiber filter tube with inner and outer coatings, and then inject the corresponding slurry into the inner and outer layers according to the design thickness calculation, and suction filter forming, removing moisture, and then demoulding and drying the wet blank formed by suction filtration to obtain a fabric-reinforced high-silica fiber filter tube.
优选地，所述步骤6)中里层注射的浆料为含有脱硝催化剂的浆液。Preferably, the slurry injected into the inner layer in the step 6) is a slurry containing a denitration catalyst.
本发明利用可编织耐高温的高硅氧纤维编织增强栅格布，大大提高了纤维滤管的力学强度，减少了纤维滤管断裂。此外通过里外两侧纤维结构，分别重点应对脱硫脱硝和除尘设置，具有效率高，良好的耐温性和往复性好，使用寿命长等特点。The invention utilizes high-silica fibers that can be woven and reinforced with high temperature resistance, thereby greatly improving the mechanical strength of the fiber filter tube and reducing the breakage of the fiber filter tube. In addition, through the fiber structure on both sides of the inner and outer sides, the focus is on desulfurization, denitrification and dust removal respectively. It has the characteristics of high efficiency, good temperature resistance and reciprocation, and long service life.
本发明中的纤维滤管采用耐高温连续纤维编织的纤维栅格圆筒增强，并利用内层具有多孔结构的高硅氧纤维作为附着脱硫脱硝催化剂的主体，与常规的陶瓷纤维滤管项目具有更好的附着效果；而根据除尘和脱硫脱硝顺序，采用里外两种结构，实现分层次除尘和脱硫脱硝，具有更高的使用效率和使用寿命，与其他陶瓷纤维滤管完全不同。The fiber filter tube in the present invention is reinforced by a fiber grid cylinder woven with high temperature resistant continuous fibers, and uses the high silica fiber with a porous structure in the inner layer as the main body for attaching the desulfurization and denitration catalyst, which is similar to the conventional ceramic fiber filter tube project. Better adhesion effect; according to the sequence of dust removal and desulfurization and denitrification, two structures are used inside and outside to achieve hierarchical dust removal and desulfurization and denitrification, which has higher efficiency and service life, which is completely different from other ceramic fiber filter tubes.
与现有技术相比，本发明的有益效果在于：Compared with the prior art, the beneficial effects of the present invention are:
(1)本发明以连续高硅氧纤维制备增强用的筒型栅格结构，高硅氧具有良好的耐温性，能显著提高长型纤维滤筒的强度，大大降低了滤筒的断裂可能；(1) The present invention uses continuous high-silica fibers to prepare a cylindrical grid structure for reinforcement. The high-silica has good temperature resistance, can significantly improve the strength of the long fiber filter cartridge, and greatly reduces the possibility of filter cartridge breakage. ;
(2)本发明开发了阶梯状结构设计，依据先除尘后脱硫脱硝，特别是灰尘主要用于外表面会影响催化剂效果，因此采用外层部分使用陶瓷纤维棉，这样成本降低，而在滤筒内侧采用高硅氧短纤维，能有效附着脱硫脱硝的催化剂，通过分层结构提高除尘脱硝效率。(2) The present invention has developed a stepped structure design, which is based on the first dust removal and then desulfurization and denitrification. In particular, the dust is mainly used on the outer surface to affect the catalyst effect. Therefore, ceramic fiber cotton is used for the outer layer part, which reduces the cost and reduces the cost in the filter cartridge. The inner side adopts high-silica short fibers, which can effectively attach the catalyst for desulfurization and denitrification, and improve the efficiency of dust removal and denitrification through the layered structure.
(3)本发明采用纤维栅格增强后，采用喷涂实现产品预附着，并能提高里外两层的有效过渡，实现两层结构的自然过渡。(3) In the present invention, after the fiber grid is used for reinforcement, the pre-adhesion of the product is realized by spraying, and the effective transition between the inner and outer layers can be improved, and the natural transition of the two-layer structure can be realized.
(4)本发明采用高硅氧连续纤维，耐高温并能编织栅格结构，而在内侧采用高硅氧短纤维，利用酸处理后的高硅氧纤维的表面微孔结构有利于吸附催化剂，提高催化剂的效率和使用寿命。(4) The present invention adopts high-silica continuous fibers, which are resistant to high temperature and can weave a grid structure, while high-silica short fibers are used on the inner side, and the surface microporous structure of the acid-treated high-silica fibers is conducive to adsorbing catalysts, Improve catalyst efficiency and service life.
附图说明Description of drawings
图1为本发明提供的织物增强型高硅氧纤维滤管的主视图；其中，1为高硅氧纤维栅格圆筒，2为内层高硅氧短纤维；3为陶瓷短纤维；1 is a front view of a fabric-reinforced high-silica fiber filter tube provided by the present invention; wherein, 1 is a high-silica fiber grid cylinder, 2 is an inner layer of high-silica short fibers; 3 is a ceramic short fiber;
图2为高硅氧纤维栅格圆筒的示意图；Fig. 2 is the schematic diagram of high silica fiber grid cylinder;
图3为本发明提供的高硅氧纤维圆筒型栅格图片。FIG. 3 is a picture of the high silica fiber cylindrical grid provided by the present invention.
具体实施方式Detailed ways
下面结合具体实施例，进一步阐述本发明。应理解，这些实施例仅用于说明本发明而不用于限制本发明的范围。此外应理解，在阅读了本发明讲授的内容之后，本领域技术人员可以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。The present invention will be further described below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
实施例1Example 1
本实施例提供了一种织物增强型高硅氧纤维滤管的制备方法，具体步骤如下：The present embodiment provides a preparation method of a fabric-reinforced high-silica fiber filter tube, and the specific steps are as follows:
步骤1)：分别将高硅氧纤维(陕西华特玻纤集团有限公司，9微米)和陶瓷纤维(浙江宏达晶体纤维有限公司，硅酸铝纤维)短切后，在球磨罐中球磨2-6h；Step 1): After the high silica fiber (Shaanxi Huate Glass Fiber Group Co., Ltd., 9 microns) and ceramic fiber (Zhejiang Hongda Crystal Fiber Co., Ltd., aluminum silicate fiber) were chopped, they were ball milled in a ball mill for 2 -6h;
步骤2)：将磨好的高硅氧纤维和陶瓷纤维过滤，去除底部的渣球及夹杂物，得到长度为30～300μm的高硅氧短纤维粉末和陶瓷短纤维粉末；Step 2): filtering the ground high-silica fibers and ceramic fibers to remove the slag balls and inclusions at the bottom to obtain high-silica short fiber powder and ceramic short fiber powder with a length of 30-300 μm;
步骤3)：将6wt.％高硅氧短纤维粉末，5wt.％硅溶胶加入到去离子水中，在高速搅拌状态下混合制备成均匀的高硅氧短纤维料浆；将质量分数为8wt.％陶瓷短纤维粉末，0.5wt.％硅溶胶，加入到去离子水中，在高速搅拌状态下混合制备成均匀的陶瓷短纤维浆料；Step 3): add 6wt.% high silica short fiber powder and 5wt.% silica sol into deionized water, and mix under high-speed stirring to prepare a uniform high silica short fiber slurry; the mass fraction is 8wt.% % ceramic short fiber powder, 0.5wt.% silica sol, added to deionized water, and mixed under high-speed stirring to prepare a uniform ceramic short fiber slurry;
步骤4)：先利用编织好的高硅氧纤维栅格圆筒，网格规格为5mm*5mm，网格布的面重为120g/m2，然后里面衬托内芯模具，采用喷涂法，先在栅格圆筒外层喷涂陶瓷短纤维浆料，采用上下多层往返喷涂，直到纤维框架外层形成0.3cm的陶瓷短纤维涂层；Step 4): First use the woven high silica fiber grid cylinder, the grid size is 5mm*5mm, the surface weight of the grid cloth is 120g/m 2 , and then the inner core mold is lined with the spraying method. The ceramic short fiber slurry is sprayed on the outer layer of the grid cylinder, and the upper and lower layers are sprayed back and forth until the outer layer of the fiber frame forms a 0.3cm ceramic short fiber coating;
步骤5)：利用内喷管，在纤维框架内侧，喷涂高硅氧短纤维浆料，喷涂方式采用上下多层往返喷涂，直到栅格圆筒内层形成0.3cm的高硅氧短纤维涂层，得到具有内外涂层的织物增强型高硅氧纤维滤管雏形；Step 5): Use the inner nozzle to spray the high-silica short fiber slurry on the inside of the fiber frame. The spraying method adopts up and down multi-layer reciprocating spraying until the inner layer of the grid cylinder forms a 0.3cm high-silica short fiber coating , to obtain the prototype of the fabric-reinforced high-silica fiber filter tube with inner and outer coatings;
步骤6)：利用外层模具和内芯模具将具有内外涂层的织物增强型高硅氧纤维滤管雏形固定，在管内放入质量分数为3％的钒钛脱硝催化剂溶液(宜兴市奥凯环保新材料有限公司)，通过抽滤从滤管内层通过外层排出后，吸附到滤管中；根据滤管重量配比，实现催化剂重量与滤管总重量比为5:100即可，抽滤后的炉管在80℃下干燥5小时后，得到织物增强型高硅氧纤维滤管，该滤管即为高温除尘滤管。Step 6): Use the outer layer mold and the inner core mold to fix the prototype of the fabric-reinforced high-silica fiber filter tube with inner and outer coatings, and put the vanadium-titanium denitration catalyst solution with a mass fraction of 3% in the tube (Okai, Yixing City). Environmental Protection New Materials Co., Ltd.), after being discharged from the inner layer of the filter tube through the outer layer through suction filtration, it is adsorbed into the filter tube; After the filtered furnace tube was dried at 80° C. for 5 hours, a fabric-reinforced high-silica fiber filter tube was obtained, and the filter tube was a high-temperature dust removal filter tube.
将制备的高温除尘滤管在发电厂的尾气实际使用，发现脱硝效率高达92.48％，除尘效率高达98.65％.具体如下表。The prepared high-temperature dust removal filter tube was actually used in the exhaust gas of the power plant, and it was found that the denitration efficiency was as high as 92.48%, and the dust removal efficiency was as high as 98.65%. The details are as follows.
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