WO2009082890A1 - Dispostif de fixation de tissu filtrant sur un disque filtrant - Google Patents

Dispostif de fixation de tissu filtrant sur un disque filtrant Download PDF

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Publication number
WO2009082890A1
WO2009082890A1 PCT/CN2008/071458 CN2008071458W WO2009082890A1 WO 2009082890 A1 WO2009082890 A1 WO 2009082890A1 CN 2008071458 W CN2008071458 W CN 2008071458W WO 2009082890 A1 WO2009082890 A1 WO 2009082890A1
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WIPO (PCT)
Prior art keywords
filter
groove
fixing device
trapezoidal
cloth
Prior art date
Application number
PCT/CN2008/071458
Other languages
English (en)
French (fr)
Inventor
Yi Liu
Kui Wang
Changjiang Li
Wu Yang
Lanhua Jin
Jian Hu
Bin He
Jiangjie Du
Original Assignee
Aluminum Corporation Of China Limited
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Filing date
Publication date
Application filed by Aluminum Corporation Of China Limited filed Critical Aluminum Corporation Of China Limited
Publication of WO2009082890A1 publication Critical patent/WO2009082890A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B01D33/23—Construction of discs or component sectors thereof

Definitions

  • the present invention relates to a filter for producing alumina, and more particularly to a fixing device for a filter cloth of a filter.
  • China's alumina plant is used in the horizontal disc filter for washing and filtering of finished aluminum hydroxide.
  • the aluminum hydroxide slurry is first added to the filter disk surface at a height of about 50 mm ; then the washing water is continuously added to pump the aluminum hydroxide on the disk surface.
  • the liquid in the aluminum hydroxide is removed after passing through the filter cloth; stop adding the washing water, and after the liquid in the aluminum hydroxide is sufficiently removed, the aluminum hydroxide is removed by a spiral bracket; The aluminum hydroxide remaining on the disk surface is loosened, and then the aluminum hydroxide slurry which needs to be washed and filtered is added, and the above-mentioned working process is repeated.
  • the fixing device of the filter disk filter cloth is mainly made of a rubber strip, which is divided into a circular rubber strip and a trapezoidal rubber strip.
  • the rubber strip needs to be hardly hit with a wooden wedge and a hammer to enter the groove, and the installation work is very difficult.
  • the installation of a filter screen filter cloth takes 15 to 20 people, which takes 8 to 10 hours.
  • the operator uses the hammer to force the rubber strip to enter the groove of the disc surface, it often hits the hand, causing injury to the operator, causing safety hazards; and often hitting the filter cloth so that The filter cloth is damaged and cannot be used. Cause waste.
  • fixing the filter cloth by tapping the rubber strip often causes the filter cloth to wrinkle and affect the filtering effect.
  • the alkali concentration of the aluminum hydroxide slurry is about 100 ⁇ 300g/l ; the temperature of the washing water is high, about 90 ⁇ 120°C, which causes the rubber strip of the fixed filter cloth to deteriorate and lose elasticity. Therefore, the filter cloth cannot be fixed well.
  • the vacuum caused by the looseness of the filter cloth reduces the degree of vacuum.
  • the power of the vacuum pump is increased, and the amount of circulating water is increased, thereby causing waste of energy.
  • the reduction in the degree of vacuum caused by the looseness of the filter cloth also increases the moisture remaining in the aluminum hydroxide, which affects the quality of the product.
  • the filter cloth In the process of performing the reverse blowing, due to the aging deformation of the rubber strip, the filter cloth is often blown up during the reverse blowing, causing the system to stop production. At this point, it is necessary to remove the aluminum hydroxide on the disk surface and reinstall the filter cloth and the rubber strip. Moreover, due to the deformation of the rubber strip, the sealing effect is lowered, and the aluminum hydroxide penetrates into the groove of the pressing cloth to form a crucible.
  • the groove of the pressing cloth is trapezoidal, and the inlet width is narrow, only 14 mm, which makes the operator difficult to clean, greatly increases the labor intensity of the worker, and even deforms the groove of the pressing cloth during cleaning, which affects the subsequent use.
  • the rubber strip and the filter cloth are purchased at a higher price.
  • the filter cloth is 6000 yuan/set, 20 sets per set, and the rubber strip is 200 yuan (RMB)/meter.
  • the service period of the rubber strip and the filter cloth is 25 to 30 days. Since the service life of the rubber strip is relatively short, the replacement of the rubber strip and the filter cloth is frequent, and the production cost is greatly improved.
  • the rubber strip is segmented into the groove of the pressing cloth, the rubber strip is relatively soft, and the joint portion thereof is difficult to be completely sealed, and the rubber strip in the pressing groove is generally 2 to 3 mm higher than the disk surface, in production operation, Sometimes it will be 4 ⁇ 5mm higher. Therefore, when removing aluminum hydroxide, avoid spiraling
  • the belt is pressed by the rubber strip, and the bottom of the spiral bracket is higher than the height of the disc surface, generally
  • the current minimum is 12mm.
  • the thickness of the aluminum hydroxide remaining on the surface of the filter plate is greatly increased, which increases the load on the vacuum pump and the blower when the blower is reversed, resulting in a reduction in equipment productivity and waste of energy.
  • the problem to be solved by the present invention is to provide a fixing device for a filter disk filter cloth, which can fix the filter cloth on the filter disk surface well, and solves the difficulty in installing the rubber strip in the prior art, and is time-consuming and labor-intensive. And technical problems caused by aging and deformation, such as product output decline, quality reduction, production cost increase, energy waste.
  • the present invention provides a fixing device for a filter disk filter cloth, which comprises a filter disk surface 1, a linear pressing groove 2, a circular pressing cloth groove 8 and a filter cloth 3, and a filter disk surface 1
  • a filter cloth 3 the joint of the filter cloth 3 is located in the groove of the linear pressing groove 2
  • the bottom pressing strip 5 is pressed at the joint of the filter cloth 3
  • the trapezoidal pressing groove 4 is located above the bottom pressing strip 5, and the trapezoidal pressing groove 4 is
  • the bottom bead 5 is connected by a screw 6.
  • the trapezoidal pressure groove 4 is made of synthetic plastic, high temperature resistant, alkali resistant and flexible synthetic polyvinyl chloride having a height of 6 to 15 inches, a width of 6 to 15 inches, and a side wall thickness from above.
  • the down slope ratio is 1.2 to 1.8.
  • Sealing lines 7 are formed on the outer walls of the two side walls, and the number of sealing lines 7 on each side wall is 1 to 6, usually five.
  • a "labyrinth seal" which is mechanically known, is formed at the seal line with the filter cloth, so that neither the aluminum hydroxide slurry nor the wash water can penetrate into the groove of the press cloth.
  • This avoids the infiltration of alkali-containing high-temperature liquid on the one hand. Corrosion of the groove of the pressure cloth, prolonging the service life of the equipment.
  • the filter cloth is normally replaced, the groove in the pressure cloth is very clean, which not only reduces the labor intensity of the workers, but also greatly shortens the time for equipment maintenance and improves the equipment. Operating rate.
  • the bottom bead 5 is made of carbon steel, preferably A3 steel.
  • the material is easy to purchase, inexpensive, and can be used with some corner scraps, and the material is easy to process, strong enough to meet production needs, and reusable.
  • the cross-sectional shape of the bottom bead 5 is trapezoidal, and the cross-sectional shape of the bottom bead 5 is trapezoidal.
  • the inclination of the trapezoidal waist corresponds to the inclination of the inner wall of the trapezoidal pressure groove 4, so that the bottom bead 5 enters the trapezoidal pressure groove 4.
  • the two can be completely reliable.
  • the ratio of the upper side of the trapezoid to the length of the lower side is 0.9 to 0.95, and the height of the trapezoid is 5 to 6 mm.
  • the length of the trapezoidal pressure groove 4 and the bottom pressure strip 5 is 300 to 1500 mm.
  • the length of the trapezoidal groove 4 and the bottom bead 5 can be selected from 400 to 1000 mm.
  • the number of screws 6 for connecting the trapezoidal groove 4 and the bottom bead 5 is 2 to 8, and the height is 10 20mm
  • the width of the bottom of the cross section of the trapezoidal groove 4 and the width of the bottom of the trapezoidal cross section of the bottom bead 5 are both smaller than the width of the opening of the upper end of the pressing groove so that the trapezoidal groove 4 and the bottom bead 5 can also be applied after the filter cloth is laid. It is easier to fit into the linear pressing groove 2 or the circular pressing groove 8.
  • the inner width of the cross section of the trapezoidal groove 4 is larger than the width of the side of the trapezoidal cross section of the bottom bead 5 by 5 mm, so that the bottom bead 5 can easily enter the inside of the trapezoidal pressure groove 4 when the screw 6 is rotated.
  • the screw 6 is tightened, and the bottom bead 5 is moved upward to enter the inside of the trapezoidal pressure groove 4, so that the left and right side walls of the trapezoidal pressure groove 4 are gradually opened, and the bottom bead 5 is moved upward to the ladder.
  • the left and right side walls of the press groove 4 abut the joint of the filter cloth 3 and the left and right inner walls of the linear press groove 2, so that the filter cloth is stably fixed in the press cloth groove while preventing the material from leaking from the joint.
  • the joint of the filter cloth 3 is overlapped on the upper surface of the linear pressing groove 2, which is advantageous for fixing the filter cloth and for keeping the groove of the pressing cloth clean and tidy.
  • the highest point of the screw 6 is lower than the filter disc surface by 1 0 ⁇ 2mm, and the optimum distance is 2mm.
  • the height of the bottom of the spiral bracket is greatly reduced from the surface of the disk to 6 mm; the amount of aluminum hydroxide remaining on the surface of the filter is greatly reduced, and the load on the vacuum pump and the blower is reduced, which increases the productivity of the equipment. And save energy.
  • the highest point of the screw 6 is higher than the filter surface 1, the height of the bottom of the screw holder is increased from the disk surface, so that the amount of aluminum hydroxide remaining on the filter surface 1 is increased, and the load of the vacuum pump and the blower is reverse blown. It increases, resulting in reduced equipment capacity and waste of energy.
  • it is lower than the surface 1 of the filter the amount of aluminum hydroxide entering the groove of the pressing cloth will increase. When the filter cloth 3 is normally replaced, the labor intensity of cleaning the aluminum hydroxide in the groove of the pressing cloth is increased.
  • the invention has the following advantages:
  • the filter cloth fixing device used in the invention is easy to purchase, inexpensive, and can also use some corner scraps, and is convenient to process, can be repeatedly used, and the cost is very low.
  • the fixing method is simple and easy to operate. When the filter cloth is installed, there is basically no damage to the filter cloth, and the filter cloth is normally replaced only when it reaches the service life. Moreover, it is not necessary to consume expensive rubber strips, which greatly reduces the production cost.
  • the production capacity of the equipment can be greatly improved. Since the highest point of the nut is lower than 0 ⁇ 2mm of the filter disc surface, the height of the bottom of the spiral bracket is greatly reduced from the disc surface to 6mm. Therefore, the amount of aluminum hydroxide remaining on the surface of the filter is greatly reduced, the load of the blower is reduced when the vacuum pump and the reverse blower are used, and the amount of circulating water used is also greatly reduced, so that the productivity of the equipment is increased and energy is saved.
  • the filter cloth is stably fixed in the groove of the pressing cloth by the two side walls of the trapezoidal pressure groove 4, and at the same time, a mechanically said "labyrinth seal" is formed at the sealing line with the filter cloth, so that Both the aluminum hydroxide slurry and the wash water cannot penetrate into the groove of the press cloth.
  • a mechanically said "labyrinth seal” is formed at the sealing line with the filter cloth, so that Both the aluminum hydroxide slurry and the wash water cannot penetrate into the groove of the press cloth.
  • it avoids the corrosion of the pressure cloth groove after infiltration of the alkali-containing high-temperature liquid, and prolongs the service life of the equipment.
  • the filter cloth is normally replaced, the groove in the pressure cloth is very clean, which not only reduces the labor intensity of the worker, but also The time for equipment maintenance is greatly shortened, and the operation rate of the equipment is improved.
  • Figure 1 is a schematic view of a disk surface of a horizontal disc filter.
  • Figure 2 is a cross-sectional view taken along the line A-A of the prior art.
  • Figure 3 is a cross-sectional view taken along line B-B of the prior art.
  • Figure 4 is a cross-sectional view taken along the line A-A of the present invention.
  • Figure 5 is a front elevational view of the present invention.
  • Figure 6 is a side view of the present invention.
  • the present invention comprises a filter disk surface 1, a linear pressure groove 2, a circular pressure cloth groove 8, a filter cloth 3, a trapezoidal pressure groove 4, a bottom bead 5 and a screw 6.
  • the filter disc surface 1 has a filter cloth 3, the filter cloth 3 joint is located in the groove of the linear pressing groove 2, the bottom pressing strip 5 is pressed at the joint of the filter cloth 3, and the bottom pressing strip 5 is a trapezoidal pressing groove 4, trapezoidal pressing
  • the groove 4 and the bottom bead 5 are connected by a screw 6.
  • the synthetic plastic polyvinyl chloride which is resistant to high temperature and alkali resistance and has certain flexibility is selected, and the trapezoidal pressure groove 4 is obtained by injection molding.
  • the height of the trapezoidal groove is 12mm
  • the width of the two outer walls is 12mm
  • the width of the left and right side walls of the trapezoidal groove 4 is the widest (the uppermost end of the side wall) is 3mm
  • the narrowest part is the lowermost end of the side wall) is 2mm
  • two The sidewall thickness is from the top to bottom slope ratio of 1.5.
  • Five seal lines are formed on the outer walls of the left and right side walls of the trapezoidal pressure groove 4.
  • the bottom bead 5 is made of A3 carbon steel, the cross-sectional shape is trapezoidal, the upper side of the trapezoid is 5.5mm, the lower side is 7.5mm, and the height is 5mm.
  • the upper side of the trapezoid is wider and narrower than the bottom opening of the trapezoidal groove 4, which is convenient for the bottom.
  • the bead 5 enters the trapezoidal pressure groove 4.
  • the height of the screw 6 is 16 mm.
  • the trapezoidal groove 4 and the bottom bead 5 used in the linear groove 2 are 400 mm in length and 6 to 4 screws are used.
  • the screw 6 is tightened to move the bottom bead 5 upward, enter the inside of the trapezoidal pressure groove 4, and move to the left and right side walls of the trapezoidal pressure groove 4 to abut the joint of the filter cloth 3 and the left and right inner walls of the linear pressing groove 2; At the time, the highest point of the screw 6 is 2 mm below the surface of the filter disc. Since the thickness of the left and right inner side walls of the trapezoidal pressure groove 4 is gradually increased from bottom to top, the left and right side walls are gradually opened to be tightly connected with the side portions of the pressing cloth groove, thereby making the filter cloth stable.
  • the ground is fixed in the groove of the pressing cloth, and at the same time, a mechanically said "labyrinth seal" is formed at the sealing line 7 so that neither the aluminum hydroxide slurry nor the washing water can penetrate into the groove of the pressing cloth.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Description

技术领域
本发明涉及一种氧化铝生产用的过滤机，特别是一种过滤机盘面 滤布的固定装置。
背景技术
我国氧化铝厂用于成品氢氧化铝洗涤与过滤的水平盘式过滤机， 其盘面上有 20块过滤布。 它们的接头处由直径为 15mm圆形橡胶条 9和梯形胶条 10将其固定在盘面压布沟槽内。 在氢氧化铝洗涤与过 滤的水平盘式过滤机的工作过程中，先将氢氧化铝浆液加入过滤机盘 面上， 高度约为 50mm; 然后不断加入洗水， 对盘面上的氢氧化铝进 行抽真空， 使氢氧化铝中的液体经过滤布后被抽走； 停止加入洗水， 待氢氧化铝中的液体被充分排除后， 用螺旋括料器将氢氧化铝括走； 然后采用反吹风， 使残留在盘面上的氢氧化铝松动， 再加入需要进行 洗涤过滤的氢氧化铝浆液， 重复前面所述的工作过程。
目前过滤机盘面滤布的固定装置主要采用橡胶条，分为圆形橡胶 条和梯形橡胶条固定。固定过滤布时，由于沟槽宽度小于橡胶条宽度， 安装过滤布时， 橡胶条需用木制楔块加手锤用力敲打方能进入沟槽， 安装作业十分困难。 通常一台过滤机盘面过滤布的安装， 需 15〜20 人， 耗时 8~10小时。 在安装过程中， 操作人员使用手锤用力敲打橡 胶条使其进入盘面压布沟槽时， 经常会敲到手上， 使操作人员受伤， 造成安全隐患；而且还经常会敲到过滤布上，使滤布损坏，不能使用， 造成浪费。另外，采用敲打橡胶条方式固定滤布，经常会使滤布褶皱， 影响过滤效果。
生产中由于氢氧化铝浆液的碱浓度高， 约为 100~300g/l; 洗涤用 水的温度高， 约 90~120°C， 这样就造成固定过滤布的橡胶条很快老 化变形， 失去弹性， 从而不能很好的固定住过滤布。在进行抽真空的 操作过程中， 由于过滤布松动造成的漏气使真空度降低， 为了维持一 定的真空度， 则要提高真空泵的功率， 增加循环水的用量， 从而造成 了能源的浪费。另外过滤布松动造成的真空度降低还会使残留在氢氧 化铝中的水分增高， 影响了产品质量。而在进行反吹风的过程中， 由 于橡胶条的老化变形，反吹风时，过滤布经常被吹起，造成系统停产。 此时就需要对盘面上的氢氧化铝进行清除， 重新安装过滤布及橡胶 条。 而且由于橡胶条变形， 使密封效果下降， 氢氧化铝会渗入到压布 沟槽内， 形成结疤。 压布沟槽为梯形， 其进口宽度较窄， 只有 14毫 米， 使操作人员清理困难， 大大增加了工人的劳动强度， 甚至在清理 时会使压布沟槽变形， 影响以后的使用。
橡胶条和过滤布这两种材料的购买价格较高， 过滤布为 6000元 / 套， 每套为 20张， 橡胶条为 200元 （人民币） /米。 橡胶条和过滤布 的使用周期为 25~30天， 由于橡胶条的使用寿命相对较短， 则造成橡 胶条和过滤布的更换较为频繁， 使生产成本大大提高。 另外， 由于橡 胶条是分段敲入压布沟槽内， 橡胶条相对较软， 其接头处难以完全密 封， 而且压布沟槽内的橡胶条一般高出盘面 2~3mm， 生产运行中， 有时还会高出 4~5mm。 所以进行氢氧化铝除料时， 为避免螺旋括料 器将压布橡胶条带起， 螺旋括料器底部距离盘面的高度较高， 一般为
20mm, 目前最低的为 12mm。 使残留在过滤机盘面上的氢氧化铝厚 度大大增加， 增大了真空泵及吹风机反吹风时的负荷， 造成设备产能 降低以及能源的浪费。
发明内容
本发明所要解决的问题是， 提供一种过滤机盘面滤布的固定装 置， 它能很好的将滤布固定在过滤机盘面上， 解决了现有技术中橡胶 条安装困难、 耗时费工以及因其老化变形后造成的影响产品产量下 降、 质量降低、 生产成本增加、 能源浪费等技术问题。
为了解决上述问题，本发明提供了一种过滤机盘面滤布的固定装 置， 它包括过滤机盘面 1、 直线压布沟槽 2、 圆形压布沟槽 8及滤布 3， 过滤机盘面 1上有滤布 3， 滤布 3接头处位于直线压布沟槽 2的 沟槽内， 底部压条 5压在滤布 3的接头处， 梯形压槽 4位于底部压条 5上面， 梯形压槽 4与底部压条 5用螺钉 6连接。
梯形压槽 4的制备材料为合成塑料， 耐高温、耐强碱性能并具有 一定柔性的合成塑料聚氯乙烯， 其高度为 6〜 15匪， 宽度为 6〜 15匪， 侧壁厚自上而下斜度比为 1.2~1.8。在其两侧壁外壁上开有密封线 7， 每个侧壁上密封线 7数量为 1~6条， 一般为 5条。当梯形压槽 4的两 侧壁逐渐撑开并与压布沟槽侧部的过滤布紧紧连在一起时，两侧壁除 了起到将过滤布稳定地固定在压布沟槽内的作用外，同时在密封线处 还与过滤布形成机械上常说的 "迷宫式密封"， 使氢氧化铝浆液以及 洗水都不能渗入压布沟槽内。这样一方面避免了含碱高温液体渗入后 腐蚀压布沟槽， 延长了设备的使用寿命， 另一方面在过滤布正常更换 时， 压布沟槽内十分清洁， 不但减轻了工人劳动强度， 而且大大缩短 了设备检修的时间， 提高了设备的运转率。
底部压条 5的制备材料为碳钢,优选方案为 A3钢。 该材料购买 容易， 价格便宜， 还可采用一些边角废料， 并且该材料加工方便， 强 度能达到生产需要，并能重复使用。底部压条 5的横截面形状为梯形， 底部压条 5的横截面形状为梯形，梯形腰的斜度与梯形压槽 4内层壁 的斜度相应， 以便底部压条 5进入到梯形压槽 4内时， 二者可以完全 靠实，梯形的上边长与下边长的比值为 0.9~0.95，梯形的高为 5~6mm 梯形压槽 4与底部压条 5的长度为 300~1500mm。 在直线压布 沟槽 2内， 梯形压槽 4与底部压条 5的长度可选择为 400~1000mm 连接梯形压槽 4和底部压条 5用的螺钉 6的数目为 2~8颗，其高 度为 10 20mm
梯形压槽 4横截面的底部宽度与底部压条 5梯形横截面底边的 宽度均比压布沟槽上端开口的宽度小 1 4 以便在铺上过滤布后 梯形压槽 4与底部压条 5也能较轻松地放入直线压布沟槽 2或圆形压 布沟槽 8内。
梯形压槽 4横截面的内宽度比底部压条 5梯形横截面上边的宽度 大 l 5mm， 以便旋转螺钉 6时底部压条 5能轻松进入梯形压槽 4的 内部。
旋紧螺钉 6， 使底部压条 5向上运动， 进入梯形压槽 4的内部， 从而使梯形压槽 4左右两侧壁逐渐撑开，底部压条 5则向上运动至梯 形压槽 4的左右侧壁将滤布 3的接头与直线压布沟槽 2左右内壁抵 实， 从而使过滤布被稳定地固定在压布沟槽内， 同时防止物料从连接 处渗漏。
滤布 3的接头在直线压布沟槽 2的上面采用搭接方式，既有利于 滤布固定， 又有利于保持压布沟槽的整洁。
旋转固定后， 螺钉 6的最高点低于过滤机盘面 1 0~2mm， 其最 佳距离为 2mm。 在此高度下， 螺旋括料器底部距离盘面的高度大大 降低， 可达到 6mm; 残留在过滤机盘面上的氢氧化铝量大大减少， 真空泵及吹风机反吹风时的负荷降低， 使设备的产能提高， 并节约了 能源。 螺钉 6的最高点如果高出过滤机盘面 1， 则要求螺旋括料器底 部距离盘面的高度增高， 使残留在过滤机盘面 1 上的氢氧化铝量加 大， 真空泵及吹风机反吹风时的负荷就增大， 造成设备产能降低以及 能源的浪费。而如果低于过滤机盘面 1过低， 会使进入压布沟槽内的 氢氧化铝增多， 在过滤布 3正常更换时， 加大了清理压布沟槽内氢氧 化铝的劳动强度。
本发明与现有技术相比， 具有以下优点：
1、 本发明采用的滤布固定装置材料购买容易， 价格便宜， 还可 采用一些边角废料，并且加工方便，能多次重复使用，成本十分低廉。 固定方法简单， 容易操作， 安装滤布时基本无滤布破损现象， 过滤布 只有到达使用寿命才正常更换。而且也不需要再消耗价格昂贵的压布 橡胶条， 大大降低了生产成本。
2、 采用本发明后， 大大降低了操作人员的劳动强度。现在一台 过滤机盘面过滤布的安装，只需 2人，耗时 1~2小时，安装轻松快捷， 无安全隐患， 也不会有过滤布损坏的现象。
3、 采用本发明后， 可以大大提高设备的产能。 由于螺母最高点 低于过滤机盘面 0~2mm，螺旋括料器底部距离盘面的高度大大降低， 可达到 6mm。 因此残留在过滤机盘面上的氢氧化铝量大大减少， 真 空泵及反吹风时吹风机的负荷降低， 使用的循环水量也大大降低， 使 设备的产能提高， 并节约了能源。
4、 采用本发明后， 过滤布稳定地被梯形压槽 4的两侧壁固定在 压布沟槽内， 同时在密封线处还与过滤布形成机械上常说的 "迷宫式 密封"， 使氢氧化铝浆液以及洗水都不能渗入压布沟槽内。 这样一方 面避免了含碱高温液体渗入后腐蚀压布沟槽， 延长了设备的使用寿 命， 另一方面在过滤布正常更换时， 压布沟槽内十分清洁， 不但减轻 了工人劳动强度， 而且大大缩短了设备检修的时间， 提高了设备的运 转率。
附图说明
附图 1为水平盘式过滤机圆盘盘面示意简图。
附图 2为现有技术 A-A向剖视图。
附图 3为现有技术 B-B向剖视图。
附图 4为本发明 A-A向剖视图。
附图 5为本发明正视图。
附图 6为本发明侧视图。
具体实施方式 实施例： 本发明包括过滤机盘面 1、 直线压布沟槽 2、 圆形压布 沟槽 8、 滤布 3、 梯形压槽 4、 底部压条 5和螺钉 6。 过滤机盘面 1 上有滤布 3， 滤布 3接头处位于直线压布沟槽 2的沟槽内， 底部压条 5压在滤布 3接头处， 底部压条 5上面为梯形压槽 4， 梯形压槽 4与 底部压条 5用螺钉 6连接。
选用耐高温、 耐强碱性能并具有一定柔性的合成塑料聚氯乙烯， 经开模注射获得梯形压槽 4。梯形压槽高为 12mm，两外壁宽为 12mm， 梯形压槽 4的左右两侧壁厚度最宽处 （侧壁的最上端） 为 3mm， 最 窄处 （侧壁的最下端） 为 2mm， 两侧壁厚自上而下斜度比为 1.5。 在 梯形压槽 4的左右两侧壁外壁制作 5条密封线。
底部压条 5采用 A3碳钢， 横截面形状为梯形， 梯形的上边长为 5.5mm, 下边长为 7.5mm， 高为 5mm; 梯形的上边长比梯形压槽 4 的底部开口宽窄的多， 便于底部压条 5进入到梯形压槽 4内。
螺钉 6的高度为 16mm。
在水平盘式过滤机盘面 1上有直线压布沟槽 2和圆形压布沟槽 8。用于直线压布沟槽 2内的梯形压槽 4和底部压条 5长度为 400mm， 用螺钉 6〜4颗。
旋紧螺钉 6， 使底部压条 5向上运动， 进入梯形压槽 4的内部， 运动至梯形压槽 4的左右侧壁将滤布 3的接头与直线压布沟槽 2的左 右内壁抵实； 此时， 螺钉 6的最高点低于过滤机盘面 2mm。 由于梯 形压槽 4的左右两内侧壁厚度由下至上逐渐增加，因而其左右两侧壁 逐渐撑开， 使其与压布沟槽侧部紧紧连在一起， 从而使过滤布被稳定 地固定在压布沟槽内，同时在密封线 7处还与过滤布形成机械上常说 的 "迷宫式密封"， 使氢氧化铝浆液以及洗水都不能渗入压布沟槽内。

Claims

权利要求书
1、 一种过滤机盘面滤布的固定装置， 它包括过滤机盘面 （1)、 直线压布沟槽（2)、 圆形压布沟槽（8)及滤布（3)， 过滤机盘面（1) 上有滤布 （3)， 滤布 （3)接头处位于直线压布沟槽 （2) 内， 其特征 在于： 底部压条 （5) 压在滤布 （3) 的接头处， 梯形压槽 （4) 位于 底部压条 （5) 上面， 螺钉 （6) 穿过梯形压槽 （4) 的顶部与底部压 条 （5) 连接。
2、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 梯形压槽 （4) 的高度为 6〜15mm，宽度为 6〜15mm。
3、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 梯形压槽 （4) 左右两侧壁厚自上而下斜度比为 1.2~1.8 。
4、根据权利要求 1、 2或 3所述的过滤机盘面滤布的固定装置， 其特征在于： 梯形压槽 （4) 的制备材料为合成塑料。
5、根据权利要求 4所述的过滤机盘面滤布的固定装置， 其特征 在于： 梯形压槽 （4) 的制备材料为聚氯乙烯。
6、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 在梯形压槽 （4) 的两侧壁外壁上有密封线 （7)。
7、根据权利要求 6所述的过滤机盘面滤布的固定装置， 其特征 在于： 每个侧壁上密封线 （7) 数量为 1~6条。
8、根据权利要求 7所述的过滤机盘面滤布的固定装置， 其特征 在于： 每个侧壁上密封线 （7) 数量为 5条。
9、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 底部压条 （5) 的制备材料为碳钢。
10、 根据权利要求 9所述的过滤机盘面滤布的固定装置， 其特 征在于： 底部压条 （5) 的制备材料为 A3钢。
11、 根据权利要求 1或 3所述的过滤机盘面滤布的固定装置， 其特征在于： 底部压条 （5) 的横截面形状为梯形， 梯形腰的斜度与 梯形压槽 （4) 内层壁的斜度相应。
12、 根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特 征在于： 梯形压槽 （4) 与底部压条 （5) 的长度为 300~1500mm
13、 根据权利要求 1或 12所述的过滤机盘面滤布的固定装置， 其特征在于： 连接每段梯形压槽 （4)和底部压条（5)用的螺钉 （6) 的数目为 2~8颗。
14、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 梯形压槽（4)横截面的宽度与底部压条（5)梯形横截面底边 的宽度均比直线压布沟槽 （2) 上端开口的宽度小 l 4mm
15、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 梯形压槽（4)横截面的底部内宽度比底部压条（5)梯形横截 面上边的宽度大 l 5mm
16、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 螺钉 （6) 的高度为 10 20
17、 根据权利要求 16所述的过滤机盘面滤布的固定装置， 其特 征在于： 螺钉 （6) 的高度为 14mm
18、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 滤布 （3 ) 的两接头处在直线压布沟槽 （2 ) 的沟槽内搭接。
19、根据权利要求 1所述的过滤机盘面滤布的固定装置， 其特征 在于： 螺钉 （6) 的最高点低于过滤机盘面 0~2mm。
20、 根据权利要求 19所述的过滤机盘面滤布的固定装置， 其特 征在于： 螺钉 （6 ) 的最高点低于过滤机盘面距离为 2mm。
PCT/CN2008/071458 2007-12-29 2008-06-27 Dispostif de fixation de tissu filtrant sur un disque filtrant WO2009082890A1 (fr)

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