WO2019028568A1 - Filter device for nitrocellulose dust in waste water and filtering method - Google Patents

Filter device for nitrocellulose dust in waste water and filtering method Download PDF

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Publication number
WO2019028568A1
WO2019028568A1 PCT/CN2017/000512 CN2017000512W WO2019028568A1 WO 2019028568 A1 WO2019028568 A1 WO 2019028568A1 CN 2017000512 W CN2017000512 W CN 2017000512W WO 2019028568 A1 WO2019028568 A1 WO 2019028568A1
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nitrocellulose
waste water
filter
rotating shaft
dust
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PCT/CN2017/000512
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French (fr)
Chinese (zh)
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费海燕
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费海燕
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Priority to PCT/CN2017/000512 priority Critical patent/WO2019028568A1/en
Publication of WO2019028568A1 publication Critical patent/WO2019028568A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/35—Self-supporting filtering elements arranged for outward flow filtration

Definitions

  • the invention relates to an energy-saving and environmental protection process, in particular to a filtering device and a filtering method for nitrating cotton chips in waste water.
  • nitrocellulose is a product of the reaction between cellulose and nitric acid. It was originally used in the military field and is an important raw material for the manufacture of propellants, missiles and rocket propellants. At the same time, nitrocellulose has good film-forming properties. It can be used for surface coatings of metals, woods, etc., and is therefore widely used in the civil industry. It is mainly used in the manufacture of various paints, stencils, inks, varnishes, bottle seals, adhesives, leather oil, nail polish, Ester-soluble or water-soluble paints, table tennis, piano keys and other products.
  • nitrocellulose production uses refined cotton as raw material.
  • waste water is generated, which contains nitrocellulose lint, which makes the recovery of wastewater difficult.
  • Direct treatment and discharge lead to waste of nitrocellulose waste.
  • the present invention provides a filtering device and a filtering method for nitrating cotton scum in wastewater, which can well recover waste water and recover nitrocellulose swarf in wastewater.
  • the filtering device and the filtering method for the nitrocellulose in the waste water include the following steps:
  • the nitrocellulose filter device in the wastewater drives the rotating shaft through the motor, and the spiral piece on the rotating shaft drives the nitrocellulose to move forward.
  • the nitration of cotton swarf is driven by the rotation of the spiral piece to discharge the discharge port of the nitrocellulose filter device from the wastewater;
  • the discharge port of the nitrifying cotton dust filter device in the waste water transports the nitrocellulose dust to the nitrifying cotton drying filter network for drying and filtering;
  • the water content of the nitrocellulose after passing the dewatering centrifuge in the first step is 45-55%.
  • the water content of the nitrated cotton swarf after extrusion filtration described in the third step is 1-2%.
  • the nitration cotton dust drying time described in the fifth step is 8-12 hours.
  • the nitrocellulose drying net should be in a cool place and well ventilated. If necessary, use a blower.
  • the nitrocellulose drying filter mesh uses a 600 mesh stainless steel mesh or a nylon mesh.
  • the nitrifying cotton dust filtering device in the waste water comprises a rotating shaft, a spiral piece, a filter net, a feeding port, a discharging port, a collecting tank and a driving motor, the spiral piece is fixedly wound on the rotating shaft, the filter net is mounted on the periphery of the spiral piece, and the driving motor is driven One end of the rotating shaft is connected, the feeding port is located on one side of the driving motor, the discharging port is located on the other side of the rotating shaft, and the collecting tank is installed under the filter net.
  • the rotating shaft feed port has an inclination angle of 10-20° toward the discharge port.
  • the pitch of the spiral piece from the feed opening to the discharge opening is gradually reduced.
  • the filter mesh is made of stainless steel mesh or nylon mesh, and the mesh number is between 300-500 mesh.
  • the invention has the advantages that the method is simple, the operation is convenient, not only the waste water is recovered, but also the nitrocellulose dust is recovered, thereby saving energy and reducing the effect.
  • Figure 1 is a flow chart of the method of the present invention.
  • FIG. 2 is a schematic view of a nitrocellulose cutting filter device in the wastewater of the present invention.
  • Figure 3 is a plan view of the nitrocellulose drying screen of the present invention.
  • a filtering device and a filtering method for nitrocellulose in waste water include the following steps:
  • the nitrocellulose filter device in the waste water drives the rotating shaft 1 through the motor, and the spiral piece 2 on the rotating shaft 1 drives the nitrilized cotton chips to move forward, and at the same time squeezes and filters, and the water flows through the filter 3 to the collecting tank 6 for recycling;
  • the nitrated cotton chips are rotated by the spiral piece 2 to drive the output of the nitration cotton dust filtering device discharge port 3 in the waste water;
  • the nitration cotton filter device discharge port 5 transports the nitrocellulose dust to the nitrocellulose drying filter 8 for drying and filtering;
  • the water content of the nitrocellulose after passing through the water removal centrifuge 7 in the first step is 45-55%.
  • the water content of the nitrated cotton swarf after extrusion filtration described in the third step is 1-2%.
  • the nitration cotton dust drying time described in the fifth step is 8-12 hours.
  • the nitrocellulose drying net should be in a cool place and well ventilated. If necessary, use a blower.
  • the nitrocellulose drying filter mesh adopts a 600-mesh stainless steel mesh or nylon mesh, and the nitrocellulose drying net should be located in a cool place and well ventilated, and if necessary, a blower is used.
  • a nitrocellulose filter device for waste water which comprises a rotating shaft 1, a spiral piece 2, a filter net 3, a feed port 4,
  • the discharge port 5, the water collecting tank 6 and the driving motor 7, the spiral piece 2 is fixedly wound around the rotating shaft 1, the filter net 3 is mounted on the periphery of the spiral piece 2, the driving motor 7 is connected to one end of the rotating shaft 1, and the feeding port 4 is located at the driving motor 7
  • the discharge port 5 is located on the other side of the rotating shaft 1, and the water collecting tank 6 is installed under the filter 3.
  • the rotating shaft 1 has an inclination angle of 10-20° from the feeding port 4 toward the discharge opening 5.
  • the pitch of the spiral piece 2 from the feed opening 4 to the discharge opening 5 is gradually reduced.
  • the filter net 3 is made of stainless steel mesh or nylon mesh, and the mesh number is between 300-500 mesh.

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

Abstract

A method for filtering nitrocellulose dust in waste water, the method comprising: ① using a transfer pump to transfer waste water containing nitrocellulose dust to a watering-removal centrifuge (7); ② the nitrocellulose dust that is outputted from a discharge port of the watering-removal centrifuge (7) being transferred to a feed port (4) of a filter device for nitrocellulose dust in waste water; ③ the filter device for nitrocellulose dust in waste water driving a rotating shaft (1) by means of a motor, and a spiral piece (2) on the rotating shaft (1) driving the nitrocellulose dust to move forward, while at the same time squeezing and filtering, water flowing through a filter screen (3) to a water collection tank (6) for recycling; ④ after being filtered, the nitrocellulose dust being driven by the rotation of the spiral piece (2) to be outputted from a discharge port (5) of the filter device for nitrocellulose dust in waste water; ⑤ the discharge port (5) of the filter device for nitrocellulose dust in waste water transferring the nitrocellulose dust to a nitrocellulose air-drying filter (8) for air-drying and filtering; ⑥ collecting and recycling the nitrocellulose dust on the nitrocellulose air-drying filter (8). The filter device for nitrocellulose dust in waste water comprises the rotating shaft (1), the spiral piece (2), the filter screen (3), the feed port ( 4), the discharge port (5), the water collection tank (6) and a driving motor; the spiral piece (2) is fixedly wound about the rotating shaft (1), and the filter screen (3) is mounted at the periphery of the spiral piece (2); the driving motor is connected to an end of the rotating shaft (1), and the feed port (4) is located at a side of the driving motor, the discharge port (5) being located at another side of the rotating shaft (1), while the water collection tank (6) is mounted below the filter screen (3). The method is convenient to operate, recovering waste water while also recovering nitrocellulose dust, thus having the effect of saving energy and reducing emissions.

Description

废水中硝化棉屑的过滤装置及过滤方法Filtration device and filtration method for nitrifying cotton waste in waste water 技术领域Technical field
本发明涉及节能环保工艺，具体涉及一种废水中硝化棉屑的过滤装置及过滤方法。The invention relates to an energy-saving and environmental protection process, in particular to a filtering device and a filtering method for nitrating cotton chips in waste water.
背景技术Background technique
纤维素硝酸酯，俗称硝化棉或硝化纤维，是纤维素与硝酸反应的产物，最初用于军用领域，是制造发射药、导弹、火箭推进剂的重要原料；同时硝化棉具有良好的成膜性能，可用于金属、木材等材料的表面图层，因此广泛应用于民用行业，主要用于制造各种油漆、打字蜡纸、油墨、漆布、瓶口密封套、粘合剂、皮革油、指甲油、酯溶性或水溶性涂料、乒乓球、钢琴键等产品。Cellulose nitrate, commonly known as nitrocellulose or nitrocellulose, is a product of the reaction between cellulose and nitric acid. It was originally used in the military field and is an important raw material for the manufacture of propellants, missiles and rocket propellants. At the same time, nitrocellulose has good film-forming properties. It can be used for surface coatings of metals, woods, etc., and is therefore widely used in the civil industry. It is mainly used in the manufacture of various paints, stencils, inks, varnishes, bottle seals, adhesives, leather oil, nail polish, Ester-soluble or water-soluble paints, table tennis, piano keys and other products.
目前国内硝化棉生产均采用精制棉为原料，生产过程中会产生大量的废水，里面含有硝化棉屑，导致废水回收困难，直接处理排放导致硝化棉屑资源浪费。At present, domestic nitrocellulose production uses refined cotton as raw material. During the production process, a large amount of waste water is generated, which contains nitrocellulose lint, which makes the recovery of wastewater difficult. Direct treatment and discharge lead to waste of nitrocellulose waste.
发明内容Summary of the invention
为了解决上述问题，本发明提出了一种废水中硝化棉屑的过滤装置及过滤方法，可以很好的回收废水和回收废水中的硝化棉屑。In order to solve the above problems, the present invention provides a filtering device and a filtering method for nitrating cotton scum in wastewater, which can well recover waste water and recover nitrocellulose swarf in wastewater.
为了达到上述发明目的，本发明提出以下技术方案：In order to achieve the above object, the present invention proposes the following technical solutions:
废水中硝化棉屑的过滤装置及过滤方法，包括以下步骤：The filtering device and the filtering method for the nitrocellulose in the waste water include the following steps:
①用输送泵将含有硝化棉屑的废水输送到去水离心机；1 conveying the wastewater containing nitrocellulose waste to a dewatering centrifuge by a transfer pump;
②将去水离心机出料口输出的硝化棉屑输送到废水中硝化棉屑过滤装置进料口；2 conveying the nitrocellulose dust outputted from the discharge port of the dewatering centrifuge to the feed port of the nitrocellulose filter device in the waste water;
③废水中硝化棉屑过滤装置通过电机带动转轴，转轴上面的螺旋片带动硝化棉屑向前运3 The nitrocellulose filter device in the wastewater drives the rotating shaft through the motor, and the spiral piece on the rotating shaft drives the nitrocellulose to move forward.
动，同时挤压过滤，水通过滤网流到集水箱回收利用；Moving, while squeezing and filtering, the water flows through the filter to the collection tank for recycling;
④过滤后硝化棉屑在螺旋片旋转带动从废水中硝化棉屑过滤装置出料口输出；4 After filtration, the nitration of cotton swarf is driven by the rotation of the spiral piece to discharge the discharge port of the nitrocellulose filter device from the wastewater;
⑤废水中硝化棉屑过滤装置出料口把硝化棉屑输送到硝化棉晾滤网上进行晾晒过滤；5 The discharge port of the nitrifying cotton dust filter device in the waste water transports the nitrocellulose dust to the nitrifying cotton drying filter network for drying and filtering;
⑥把硝化棉晾滤网上的硝化棉屑收集再利用。6 Collect and reuse the nitrocellulose lint on the nitrocellulose drying filter.
第①步中通过去水离心机后的硝化棉含水量45-55％。The water content of the nitrocellulose after passing the dewatering centrifuge in the first step is 45-55%.
第③步中所述的挤压过滤后硝化棉屑含水量1-2％。The water content of the nitrated cotton swarf after extrusion filtration described in the third step is 1-2%.
第⑤步所述的硝化棉屑晾晒过滤时间为8-12小时，硝化棉晾晒网要位于阴凉处且通风好，必要时使用鼓风机。The nitration cotton dust drying time described in the fifth step is 8-12 hours. The nitrocellulose drying net should be in a cool place and well ventilated. If necessary, use a blower.
所述的硝化棉晾滤网采用600目的不锈钢网或尼龙网。 The nitrocellulose drying filter mesh uses a 600 mesh stainless steel mesh or a nylon mesh.
废水中硝化棉屑过滤装置，它包括转轴、螺旋片、过滤网、进料口、出料口、集水箱和驱动电机，螺旋片固定绕在转轴上，过滤网装在螺旋片外围，驱动电机连接转轴一端，进料口位于驱动电机一侧，出料口位于转轴另外一侧，集水箱装于过滤网下面。The nitrifying cotton dust filtering device in the waste water comprises a rotating shaft, a spiral piece, a filter net, a feeding port, a discharging port, a collecting tank and a driving motor, the spiral piece is fixedly wound on the rotating shaft, the filter net is mounted on the periphery of the spiral piece, and the driving motor is driven One end of the rotating shaft is connected, the feeding port is located on one side of the driving motor, the discharging port is located on the other side of the rotating shaft, and the collecting tank is installed under the filter net.
所述的转轴进料口向出料口方向有10-20°倾角。The rotating shaft feed port has an inclination angle of 10-20° toward the discharge port.
所述的螺旋片由进料口到出料口之间的螺距是逐渐变小。The pitch of the spiral piece from the feed opening to the discharge opening is gradually reduced.
所述的过滤网是采用不锈钢网或者尼龙网，目数是300-500目之间。The filter mesh is made of stainless steel mesh or nylon mesh, and the mesh number is between 300-500 mesh.
本发明的优点是方法简单，操作方便，不但回收了废水，而且也回收了硝化棉屑，起到节能减排效果。The invention has the advantages that the method is simple, the operation is convenient, not only the waste water is recovered, but also the nitrocellulose dust is recovered, thereby saving energy and reducing the effect.
附图说明DRAWINGS
图1是本发明的方法流程图。Figure 1 is a flow chart of the method of the present invention.
图2是本发明的废水中硝化棉屑过滤装置示意图。2 is a schematic view of a nitrocellulose cutting filter device in the wastewater of the present invention.
图3是本发明的硝化棉晾滤网俯视图。Figure 3 is a plan view of the nitrocellulose drying screen of the present invention.
具体实施方式Detailed ways
为了对本发明进一步的说明，下面结合说明书附图来介绍：In order to further illustrate the present invention, the following description is accompanied by the accompanying drawings:
参照附图1，废水中硝化棉屑的过滤装置及过滤方法，包括以下步骤：Referring to Figure 1, a filtering device and a filtering method for nitrocellulose in waste water include the following steps:
①用输送泵将含有硝化棉屑的废水输送到去水离心机7；1 using a transfer pump to transport wastewater containing nitrocellulose dust to a dewatering centrifuge 7;
②将去水离心机7出料口输出的硝化棉屑输送到废水中硝化棉屑过滤装置进料口4；2 conveying the nitrocellulose dust outputted from the discharge port of the dewatering centrifuge 7 to the feed port 4 of the nitrocellulose filter device in the waste water;
③废水中硝化棉屑过滤装置通过电机带动转轴1，转轴1上面的螺旋片2带动硝化棉屑向前运动，同时挤压过滤，水通过滤网3流到集水箱6回收利用；3 The nitrocellulose filter device in the waste water drives the rotating shaft 1 through the motor, and the spiral piece 2 on the rotating shaft 1 drives the nitrilized cotton chips to move forward, and at the same time squeezes and filters, and the water flows through the filter 3 to the collecting tank 6 for recycling;
④过滤后硝化棉屑在螺旋片2旋转带动从废水中硝化棉屑过滤装置出料口3输出；4 After filtration, the nitrated cotton chips are rotated by the spiral piece 2 to drive the output of the nitration cotton dust filtering device discharge port 3 in the waste water;
⑤废水中硝化棉屑过滤装置出料口5把硝化棉屑输送到硝化棉晾滤网8上进行晾晒过滤；5 In the waste water, the nitration cotton filter device discharge port 5 transports the nitrocellulose dust to the nitrocellulose drying filter 8 for drying and filtering;
⑥把硝化棉晾滤网8上的硝化棉屑收集再利用。6 Collect and reuse the nitrocellulose lint on the nitrocellulose drying filter 8.
第①步中通过去水离心机7后的硝化棉含水量45-55％。The water content of the nitrocellulose after passing through the water removal centrifuge 7 in the first step is 45-55%.
第③步中所述的挤压过滤后硝化棉屑含水量1-2％。The water content of the nitrated cotton swarf after extrusion filtration described in the third step is 1-2%.
第⑤步所述的硝化棉屑晾晒过滤时间为8-12小时，硝化棉晾晒网要位于阴凉处且通风好，必要时使用鼓风机。The nitration cotton dust drying time described in the fifth step is 8-12 hours. The nitrocellulose drying net should be in a cool place and well ventilated. If necessary, use a blower.
参照附图3，所述的硝化棉晾滤网采用600目的不锈钢网或尼龙网，硝化棉晾晒网要位于阴凉处且通风好，必要时使用鼓风机。Referring to Figure 3, the nitrocellulose drying filter mesh adopts a 600-mesh stainless steel mesh or nylon mesh, and the nitrocellulose drying net should be located in a cool place and well ventilated, and if necessary, a blower is used.
参照附图2，废水中硝化棉屑过滤装置，它包括转轴1、螺旋片2、过滤网3、进料口4、 出料口5、集水箱6和驱动电机7，螺旋片2固定绕在转轴1上，过滤网3装在螺旋片2外围，驱动电机7连接转轴1一端，进料口4位于驱动电机7一侧，出料口5位于转轴1另外一侧，集水箱6装于过滤网3下面。Referring to Figure 2, a nitrocellulose filter device for waste water, which comprises a rotating shaft 1, a spiral piece 2, a filter net 3, a feed port 4, The discharge port 5, the water collecting tank 6 and the driving motor 7, the spiral piece 2 is fixedly wound around the rotating shaft 1, the filter net 3 is mounted on the periphery of the spiral piece 2, the driving motor 7 is connected to one end of the rotating shaft 1, and the feeding port 4 is located at the driving motor 7 On the side, the discharge port 5 is located on the other side of the rotating shaft 1, and the water collecting tank 6 is installed under the filter 3.
所述的转轴1由进料口4向出料口5方向有10-20°倾角。The rotating shaft 1 has an inclination angle of 10-20° from the feeding port 4 toward the discharge opening 5.
所述的螺旋片2由进料口4到出料口5之间的螺距是逐渐变小。The pitch of the spiral piece 2 from the feed opening 4 to the discharge opening 5 is gradually reduced.
所述的过滤网3是采用不锈钢网或者尼龙网，目数是300-500目之间。 The filter net 3 is made of stainless steel mesh or nylon mesh, and the mesh number is between 300-500 mesh.

Claims (9)

  1. 废水中硝化棉屑的过滤装置及过滤方法，其特征在于包括以下步骤：A filtering device and a filtering method for nitrating cotton scum in wastewater, comprising the following steps:
    ①用输送泵将含有硝化棉屑的废水输送到去水离心机；1 conveying the wastewater containing nitrocellulose waste to a dewatering centrifuge by a transfer pump;
    ②将去水离心机出料口输出的硝化棉屑输送到废水中硝化棉屑过滤装置进料口；2 conveying the nitrocellulose dust outputted from the discharge port of the dewatering centrifuge to the feed port of the nitrocellulose filter device in the waste water;
    ③废水中硝化棉屑过滤装置通过电机带动转轴，转轴上面的螺旋片带动硝化棉屑向前运动，同时挤压过滤，水通过滤网流到集水箱回收利用；3 The nitrocellulose filter device in the waste water drives the rotating shaft through the motor, and the spiral piece on the rotating shaft drives the nitrilized cotton chips to move forward, and at the same time squeezes and filters, and the water flows through the filter to the collecting tank for recycling;
    ④过滤后硝化棉屑在螺旋片旋转带动从废水中硝化棉屑过滤装置出料口输出；4 After filtration, the nitration of cotton swarf is driven by the rotation of the spiral piece to discharge the discharge port of the nitrocellulose filter device from the wastewater;
    ⑤废水中硝化棉屑过滤装置出料口把硝化棉屑输送到硝化棉晾滤网上进行晾晒过滤；5 The discharge port of the nitrifying cotton dust filter device in the waste water transports the nitrocellulose dust to the nitrifying cotton drying filter network for drying and filtering;
    ⑥把硝化棉晾滤网上的硝化棉屑收集再利用。6 Collect and reuse the nitrocellulose lint on the nitrocellulose drying filter.
  2. 根据权利要求1所述的废水中硝化棉屑的过滤装置及过滤方法，其特征在于第①步中通过去水离心机后的硝化棉含水量45-55％。A filtering device and a filtering method for nitrating cotton scum in a waste water according to claim 1, wherein the nitrocellulose after passing through the dewatering centrifuge in the first step has a water content of 45 to 55%.
  3. 根据权利要求1所述的废水中硝化棉屑的过滤装置及过滤方法，其特征在于第③步中所述的挤压过滤后硝化棉屑含水量1-2％。A filtering device and a filtering method for nitrating cotton scum in a waste water according to claim 1, characterized in that the water content of the nitrated cotton swarf after extrusion and filtration described in the third step is 1-2%.
  4. 根据权利要求1所述的废水中硝化棉屑的过滤装置及过滤方法，其特征在于第⑤步所述的硝化棉屑晾晒过滤时间为8-12小时，硝化棉晾晒网要位于阴凉处且通风好，必要时使用鼓风机。The filtering device and the filtering method for nitrating cotton scum in the waste water according to claim 1, characterized in that the nitration cotton dust drying time in the fifth step is 8-12 hours, and the nitrocellulose drying net is located in a cool place and is ventilated. Ok, use a blower if necessary.
  5. 根据权利要求1所述的废水中硝化棉屑的过滤装置及过滤方法，其特征在于所述的硝化棉晾滤网采用600目的不锈钢网或尼龙网。A filtering device and a filtering method for nitrating cotton scum in a waste water according to claim 1, wherein the nitrocellulose drying filter mesh uses a 600-mesh stainless steel mesh or a nylon mesh.
  6. 废水中硝化棉屑过滤装置，其特征在于它包括转轴、螺旋片、过滤网、进料口、出料口、集水箱和驱动电机，螺旋片固定绕在转轴上，过滤网装在螺旋片外围，驱动电机连接转轴一端，进料口位于驱动电机一侧，出料口位于转轴另外一侧，集水箱装于过滤网下面。The nitrocellulose filter device in waste water is characterized in that it comprises a rotating shaft, a spiral piece, a filter net, a feeding port, a discharge port, a water collecting tank and a driving motor, and the spiral piece is fixedly wound around the rotating shaft, and the filter net is installed on the periphery of the spiral piece The driving motor is connected to one end of the rotating shaft, the feeding port is located on one side of the driving motor, the discharging port is located on the other side of the rotating shaft, and the collecting tank is installed under the filter net.
  7. 根据权利要求6所述的废水中硝化棉屑过滤装置，其特征是所述的转轴进料口向出料口方向有10-20°倾角。The nitrocellulose cutting filter device for wastewater according to claim 6, wherein said rotating shaft inlet port has an inclination angle of 10-20° toward the discharge port.
  8. 根据权利要求6所述的废水中硝化棉屑过滤装置，其特征是所述的螺旋片由进料口到出料口之间的螺距是逐渐变小。The nitrocellulose sifting filter device for wastewater according to claim 6, wherein the pitch of the spiral piece from the feed port to the discharge port is gradually reduced.
  9. 根据权利要求6所述的废水中硝化棉屑过滤装置，其特征是所述的过滤网是采用不锈钢网或者尼龙网，目数是300-500目之间。 The nitrocellulose cutting filter device for wastewater according to claim 6, wherein the filter mesh is made of stainless steel mesh or nylon mesh, and the mesh number is between 300 and 500 mesh.
PCT/CN2017/000512 2017-08-09 2017-08-09 Filter device for nitrocellulose dust in waste water and filtering method WO2019028568A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4041433A1 (en) * 1990-12-21 1992-06-25 Siemens Ag Multiphase sample mixt. prepn. appts. - includes back-flushable cross-flow filter
CN101249338A (en) * 2007-11-22 2008-08-27 宁波德安生态环保工程有限公司 Filter capable of removing suspended substance in water
CN103263796A (en) * 2013-06-06 2013-08-28 南通泰利达化工有限公司 Filter device and filter method for nitrocotton scraps in waste water
CN203264396U (en) * 2013-06-06 2013-11-06 南通泰利达化工有限公司 Filter device for nitrocotton flocking in waste water
CN105329958A (en) * 2015-11-20 2016-02-17 四川北方硝化棉股份有限公司 Method for recovering nitro-cotton flock from dehydration wastewater of nitro-cotton

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4041433A1 (en) * 1990-12-21 1992-06-25 Siemens Ag Multiphase sample mixt. prepn. appts. - includes back-flushable cross-flow filter
CN101249338A (en) * 2007-11-22 2008-08-27 宁波德安生态环保工程有限公司 Filter capable of removing suspended substance in water
CN103263796A (en) * 2013-06-06 2013-08-28 南通泰利达化工有限公司 Filter device and filter method for nitrocotton scraps in waste water
CN203264396U (en) * 2013-06-06 2013-11-06 南通泰利达化工有限公司 Filter device for nitrocotton flocking in waste water
CN105329958A (en) * 2015-11-20 2016-02-17 四川北方硝化棉股份有限公司 Method for recovering nitro-cotton flock from dehydration wastewater of nitro-cotton

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