WO2022222341A1 - 一种可在线排污的过滤器及其工作方法 - Google Patents

一种可在线排污的过滤器及其工作方法 Download PDF

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Publication number
WO2022222341A1
WO2022222341A1 PCT/CN2021/115625 CN2021115625W WO2022222341A1 WO 2022222341 A1 WO2022222341 A1 WO 2022222341A1 CN 2021115625 W CN2021115625 W CN 2021115625W WO 2022222341 A1 WO2022222341 A1 WO 2022222341A1
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Prior art keywords
filter
filter screen
flange
cylinder
filter cylinder
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PCT/CN2021/115625
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English (en)
French (fr)
Inventor
杨玉
李红智
张磊
吴帅帅
张纯
高炜
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西安热工研究院有限公司
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Publication of WO2022222341A1 publication Critical patent/WO2022222341A1/zh

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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
    • B01D29/01—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 flat filtering elements
    • 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
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
    • 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • 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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • 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
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters

Definitions

  • the invention belongs to the field of fluid filtration, and relates to a filter capable of on-line sewage discharge and a working method thereof.
  • filters are often installed upstream of key equipment.
  • various new compact heat exchangers have gradually begun to be popularized and applied, such as printed circuit board heat exchangers. Since the size of the flow channel of the printed circuit board heat exchanger is very small, the equivalent diameter is only about 2 mm, so when the heat exchange fluid is not very clean, the flow channel of the heat exchanger will be blocked.
  • a filter is generally installed at the fluid inlet end of the printed circuit board heat exchanger. It is hoped that impurities such as particulate matter in the working fluid will be filtered out to ensure that the micro heat exchange channel of the filter will not be blocked. .
  • the commonly used filter is generally a screen type, which is installed on the inlet pipe of the microchannel heat exchanger by flange or welding.
  • this type of filter screen cannot be cleaned online. If the filter is blocked, it can only be stopped and replaced, which reduces the effective production time and is time-consuming and labor-intensive; or set up parallel filters in the design, but this increases The complexity and cost of the system.
  • the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and to provide a filter that can discharge sewage online and a working method thereof.
  • the filter for online sewage discharge includes a filter cylinder, a filter screen and an outlet pipe, the filter screen is located in the filter cylinder, and the inlet of one end of the filter screen is fixed at the inlet of the filter cylinder. , the other end of the filter screen is connected with one end of the lead-out pipe, and the other end of the lead-out pipe is provided with a shut-off system after passing through the filter cylinder.
  • It also includes a controller and a differential pressure detection system for detecting the pressure difference before and after the filter screen.
  • the controller is connected with the output end of the differential pressure detection system and the control end of the shut-off system.
  • the inlet of the filter cylinder is provided with a first filter cylinder flange and an upstream matching flange, wherein two first gaskets and a filter are arranged between the first filter cylinder flange and the upstream matching flange.
  • a screen holding body wherein the inlet of the filter screen is fixedly connected to the screen holding body, the screen holding body is located between the two first gaskets, and between the flange of the first filter cylinder and the upstream matching flange connected.
  • It also includes a screen handle, wherein the end of the screen handle is connected to the screen.
  • the outlet of the filter cylinder is provided with a second filter cylinder flange and a downstream counterpart flange, wherein the second filter cylinder flange is connected with the downstream counterpart flange, and the second filter cylinder flange is connected to the downstream counterpart flange.
  • a second gasket is arranged between the downstream mating flanges.
  • the flange of the first filter cylinder and the upstream counterpart flange and the flange of the second filter cylinder and the downstream counterpart are connected by bolts.
  • a support column for supporting the filter screen is arranged in the filter cylinder.
  • the outer wall of the filter cylinder is provided with a lifting lug.
  • the shut-off system includes a first shut-off valve and a second shut-off valve.
  • a working method of a filter that can discharge sewage on-line includes the following steps:
  • the working medium enters the filter screen through the inlet of the filter screen, and then is filtered through the filter screen and then discharged through the outlet of the filter cylinder.
  • the particulate impurities in the working medium are filtered by the filter screen.
  • the switch-off system is turned on, so that a pressure difference is formed between the inside of the filter cylinder and the particle impurities outlet of the lead-out pipe.
  • the particulate impurities on the filter screen are discharged through the particulate impurities outlet of the extraction pipe.
  • the online sewage-discharging filter and its working method according to the present invention are in specific operation, when the filter screen needs to be washed, the switch-off system is turned on, so that there is a gap between the inside of the filter cylinder and the particle impurity outlet of the lead-out pipe.
  • a pressure difference is formed, under the action of the pressure difference, the filter screen is washed by the working medium in the filter cylinder, and finally the particulate impurities on the filter screen are discharged through the particle impurities outlet of the extraction pipe, so as to realize the online purging of the filter screen , No need to stop and remove the filter screen and then clean it, reducing the number of shutdowns, and greatly reducing the workload and time of cleaning the filter, improving the time utilization rate of operation and production, and ensuring that the resistance of the filter is maintained at a low level It has a simple structure, stable and reliable performance, convenient use and maintenance, and is suitable for filtration of various fluids.
  • FIG. 1 is a schematic structural diagram of the present invention.
  • 1 is the filter cylinder
  • 2 is the filter screen holder
  • 3 is the filter screen
  • 4 is the outlet pipe
  • 5 is the support column
  • 6 is the first shut-off valve
  • 7 is the second shut-off valve
  • 8 is the Particle impurity outlet
  • 9 is the flange of the second filter cylinder
  • 10 is the flange of the first filter cylinder
  • 11 is the downstream matching flange
  • 12 is the upstream matching flange
  • 13 is the lifting lug
  • 14 is the filter handle
  • 15 is the first gasket
  • 16 is the second gasket.
  • the filter for online sewage discharge includes a filter cylinder 1, a filter screen 3 and an outlet pipe 4.
  • the filter screen 3 is located in the filter cylinder 1, and the inlet of one end of the filter screen 3 is fixed to the filter.
  • the other end of the filter screen 3 is connected with one end of the lead-out pipe 4, and the other end of the lead-out pipe 4 is provided with a shut-off system after passing through the filter cylinder 1.
  • the invention also includes a controller and a differential pressure detection system for detecting the pressure difference between the front and rear of the filter screen 3.
  • the controller is connected with the output end of the differential pressure detection system and the control end of the shutdown system, and the controller detects the pressure difference through the differential pressure detection system.
  • the inlet of the filter cylinder 1 is provided with a first filter cylinder flange 10 and an upstream counterpart flange 12 , wherein two second filter cylinder flanges 10 and the upstream counterpart flange 12 are provided between the first filter cylinder flange 10 and the upstream counterpart flange 12 .
  • a gasket 15 and the filter screen holder 2 wherein the inlet of the filter screen 3 is fixedly connected with the filter screen holder 2, the filter screen holder 2 is located between the two first gaskets 15, the first filter
  • the cylinder flange 10 is connected with the upstream matching flange 12, the end of the filter handle 14 is connected with the filter screen 3, the two first gaskets 15, the filter screen holder 2 and the second gasket 16 All are ring structures.
  • the outlet of the filter cylinder 1 is provided with a second filter cylinder flange 9 and a downstream counterpart flange 11, wherein the second filter cylinder flange 9 is connected with the downstream counterpart flange 11, and the second filter cylinder flange 9 is connected with the downstream counterpart flange 11.
  • a second gasket 16 is provided between the cylinder flange 9 and the downstream counterpart flange 11; between the first filter cylinder flange 10 and the upstream counterpart flange 12, and between the second filter cylinder flange 9 and the downstream counterpart
  • the mating flanges 11 are all connected by bolts.
  • the filter cylinder 1 is provided with a support column 5 for supporting the filter screen 3; the outer wall of the filter cylinder 1 is provided with a lifting lug 13; the shut-off system includes a first shut-off valve 6 and a second shut-off valve 6.
  • the shut-off valve 7 is connected to the controller with the control end of the first shut-off valve 6 and the control end of the second shut-off valve 7 .
  • the working method of the on-line sewage filter of the present invention comprises the following steps:
  • the working medium enters the filter screen 3 through the inlet of the filter screen 3, and then is filtered through the filter screen 3 and then discharged through the outlet of the filter cylinder 1.
  • the particulate impurities in the working medium are filtered by the filter screen 3.
  • the switch system is turned on, so that a pressure difference is formed between the inside of the filter cylinder 1 and the particle impurities outlet 8 of the extraction pipe 4.
  • the filter screen 3 is washed with the working fluid, and finally the particulate impurities on the filter screen 3 are discharged through the particle impurities outlet 8 of the extraction pipe 4 .
  • the present invention utilizes the pressure difference between the working fluid and the external environment of the pipe fitting to realize the purging of the particulate impurities deposited on the filter screen 3, and discharges the purged particulate impurities out of the pipe, so as to realize the filter screen 3
  • the on-line cleaning can not only reduce the number of downtimes and increase the production running time, but also maintain the filter resistance at a low level and reduce energy consumption.

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

Abstract

本发明公开了一种可在线排污的过滤器及其工作方法，包括过滤器筒体、滤网及引出管，滤网位于过滤器筒体内，滤网一端的入口固定于过滤器筒体的入口处，滤网的另一端与引出管的一端相连接，引出管的另一端穿出过滤器筒体后设置有关断系统，该过滤器及其工作方法能够实现滤网的在线清理，同时结构简单，成本低。

Description

一种可在线排污的过滤器及其工作方法 技术领域
本发明属于流体过滤领域，涉及一种可在线排污的过滤器及其工作方法。
背景技术
在工业领域，为了确保设备不被工质携带的颗粒物等杂质损坏或堵塞，常常会在关键设备的上游设置过滤器。例如，为了提高传热效率同时减小阻力损失，各种新型紧凑式换热器逐渐开始推广应用，例如印刷电路板换热器。由于印刷电路板换热器的流道尺寸很小，当量直径仅为2毫米左右，所以当换热流体不是很洁净的时候，会造成换热器流道的堵塞。为了防止换热器流道发生堵塞，印刷电路板换热器的流体进口端一般都会安装过滤器，希望将工质中的颗粒物等杂质过滤下来，确保过滤器的微型换热通道不会被堵塞。
由于系统在安装过程中不可避免地会在管道产生一些杂物，而且管道的壁面上也会有氧化皮等的剥落，因此在运行初期，甚至长期运行后管道中都有存在杂物，因此过滤器需长期可靠运行。目前常用的过滤器一般为滤网式，通过法兰或焊接的方式安装在微通道换热器的进口管道上。但是，这种类型的滤网无法在线清理，如果发生过滤器堵塞的情况，只能停机更换，减小了有效的生产时间而且费时费力；或在设计时设置并联的过滤器，但这增加了系统的复杂程度和成本。
发明内容
本发明的目的在于克服上述现有技术的缺点，提供了一种可在线排污的过滤器及其工作方法，该过滤器及其工作方法能够实现滤网的在线清理，同时结构简单，成本低。
为达到上述目的，本发明所述的可在线排污的过滤器包括过滤器筒体、滤网及引出管，滤网位于过滤器筒体内，滤网一端的入口固定于过滤器筒体的入口处，滤网的另一端与引出管的一端相连接，引出管的另一端穿出过滤器筒体后设置有关断系统。
还包括控制器以及用于检测滤网前后压力差的压差检测系统，控制器与压差检测系统的输出端及关断系统的控制端相连接。
过滤器筒体的入口处设置有第一过滤器筒体法兰及上游配对法兰，其中，第一过滤器筒体法兰与上游配对法兰之间设置有两个第一垫片及滤网夹持体，其中，滤网的入口与滤网夹持体固定连接，滤网夹持体位于两个第一垫片之间，第一过滤器筒体法兰与上游配对法兰之间相连接。
还包括滤网把手，其中，滤网把手的端部与滤网相连接。
过滤器筒体的出口处设置有第二过滤器筒体法兰及下游配对法兰，其中，第二过滤器筒体法兰与下游配对法兰相连接，第二过滤器筒体法兰与下游配对法兰之间设置有第二垫片。
第一过滤器筒体法兰与上游配对法兰之间以及第二过滤器筒体法兰与下游配对法兰之间均通过螺栓相连接。
过滤器筒体内设置有用于对滤网进行支撑的支撑柱。
过滤器筒体的外壁上设置有吊耳。
关断系统包括第一关断阀及第二关断阀。
一种可在线排污的过滤器的工作方法包括以下步骤：
工质经滤网的入口进入到滤网中，再经滤网过滤后经过滤器筒体的出口排出，工质中的颗粒杂质被滤网过滤，当滤网前后的压差大于预设值时，则打开关断系统，使得过滤器筒体内部与引出管的颗粒杂质出口之间形成压力差，在该压力差的作用下，通过过滤器筒体内的工质对滤网进行冲洗，最终使得滤网上的颗粒杂质通过引出管的颗粒杂质出口排出。
本发明具有以下有益效果：
本发明所述的可在线排污的过滤器及其工作方法在具体工作时，当需要对滤网进行冲洗时，则打开关断系统，使得过滤器筒体内部与引出管的颗粒杂质出口之间形成压力差，在该压力差的作用下，通过过滤器筒体内的工质对滤网进行冲洗，最终使得滤网上的颗粒杂质通过引出管的颗粒杂质出口排出，以实现滤网的在线吹扫，无需停机拆下滤网后再清理，减少停机的次数，而且大大减小了清理过滤器的工作量及时间，提高了运行生产的时间利用率，同时可以确保过滤器的阻力维持在较低的水平，减少能耗，结构简单，性能稳定可靠，使用维护方便，适合用于多种流体的过滤。
附图说明
图1为本发明的结构示意图。
其中，1为过滤器筒体、2为滤网夹持体、3为滤网、4为引出管、5为支撑柱、6为第一关断阀、7为第二关断阀、8为颗粒杂质出口、9为第二过滤器筒体法兰、10为第一过滤器筒体法兰、11为下游配对法兰、 12为上游配对法兰、13为吊耳、14为滤网把手、15为第一垫片、16为第二垫片。
具体实施方式
下面结合附图对本发明做进一步详细描述：
参考图1，本发明所述的可在线排污的过滤器包括过滤器筒体1、滤网3及引出管4，滤网3位于过滤器筒体1内，滤网3一端的入口固定于过滤器筒体1的入口处，滤网3的另一端与引出管4的一端相连接，引出管4的另一端穿出过滤器筒体1后设置有关断系统。
本发明还包括控制器以及用于检测滤网3前后压力差的压差检测系统，控制器与压差检测系统的输出端及关断系统的控制端相连接，控制器通过压差检测系统检测滤网3前后的压力差，当该压力差大于等于预设值时，则打开关断系统，对滤网3进行冲洗。
过滤器筒体1的入口处设置有第一过滤器筒体法兰10及上游配对法兰12，其中，第一过滤器筒体法兰10与上游配对法兰12之间设置有两个第一垫片15及滤网夹持体2，其中，滤网3的入口与滤网夹持体2固定连接，滤网夹持体2位于两个第一垫片15之间，第一过滤器筒体法兰10与上游配对法兰12之间相连接，滤网把手14的端部与滤网3相连接，两个第一垫片15、滤网夹持体2及第二垫片16均为环形结构。
过滤器筒体1的出口处设置有第二过滤器筒体法兰9及下游配对法兰11，其中，第二过滤器筒体法兰9与下游配对法兰11相连接，第二过滤器筒体法兰9与下游配对法兰11之间设置有第二垫片16；第一过滤器筒体法兰10与上游配对法兰12之间以及第二过滤器筒体法兰9与 下游配对法兰11之间均通过螺栓相连接。
另外，过滤器筒体1内设置有用于对滤网3进行支撑的支撑柱5；过滤器筒体1的外壁上设置有吊耳13；关断系统包括第一关断阀6及第二关断阀7，控制器与第一关断阀6的控制端及第二关断阀7的控制端相连接。
本发明所述的可在线排污的过滤器的工作方法包括以下步骤：
工质经滤网3的入口进入到滤网3中，再经滤网3过滤后经过滤器筒体1的出口排出，工质中的颗粒杂质被滤网3过滤，当滤网3前后的压差大于预设值时，则打开关断系统，使得过滤器筒体1内部与引出管4的颗粒杂质出口8之间形成压力差，在该压力差的作用下，通过过滤器筒体1内的工质对滤网3进行冲洗，最终使得滤网3上的颗粒杂质通过引出管4的颗粒杂质出口8排出。
冲洗预设时间后，关闭第一关断阀6及第七关断阀7，过滤器开始正常工作，当滤网出现损坏时，则在停机检修时，将第一滤网筒体法兰10及上游配对法兰12松开，再进行滤网的更换，然后将滤网3与引出管4之间螺纹连接。
鉴于此，本发明利用工质与管件外环境之间的压差，实现对沉积在滤网3上的颗粒杂质的吹扫，并将吹扫下来的颗粒杂质排出管外，以实现滤网3的在线清理，不仅可减少停机的次数，提高生产运行的时间，还可以维持过滤器的阻力在较低的水平，减少能耗。

Claims (10)

  1. 一种可在线排污的过滤器，其特征在于，包括过滤器筒体(1)、滤网(3)及引出管(4)，滤网(3)位于过滤器筒体(1)内，滤网(3)一端的入口固定于过滤器筒体(1)的入口处，滤网(3)的另一端与引出管(4)的一端相连接，引出管(4)的另一端穿出过滤器筒体(1)后设置有关断系统。
  2. 根据权利要求1所述的可在线排污的过滤器，其特征在于，还包括控制器以及用于检测滤网(3)前后压力差的压差检测系统，控制器与压差检测系统的输出端及关断系统的控制端相连接。
  3. 根据权利要求1所述的可在线排污的过滤器，其特征在于，过滤器筒体(1)的入口处设置有第一过滤器筒体法兰(10)及上游配对法兰(12)，其中，第一过滤器筒体法兰(10)与上游配对法兰(12)之间设置有两个第一垫片(15)及滤网夹持体(2)，其中，滤网(3)的入口与滤网夹持体(2)固定连接，滤网夹持体(2)位于两个第一垫片(15)之间，第一过滤器筒体法兰(10)与上游配对法兰(12)之间相连接。
  4. 根据权利要求3所述的可在线排污的过滤器，其特征在于，还包括滤网把手(14)，其中，滤网把手(14)的端部与滤网(3)相连接。
  5. 根据权利要求3所述的可在线排污的过滤器，其特征在于，过滤器筒体(1)的出口处设置有第二过滤器筒体法兰(9)及下游配对法兰(11)，其中，第二过滤器筒体法兰(9)与下游配对法兰(11)相连接，第二过滤器筒体法兰(9)与下游配对法兰(11)之间设置有第二垫片(16)。
  6. 根据权利要求5所述的可在线排污的过滤器，其特征在于，第一过滤器筒体法兰(10)与上游配对法兰(12)之间以及第二过滤器筒体法兰(9)与下游配对法兰(11)之间均通过螺栓相连接。
  7. 根据权利要求1所述的可在线排污的过滤器，其特征在于，过滤器筒体(1)内设置有用于对滤网(3)进行支撑的支撑柱(5)。
  8. 根据权利要求1所述的可在线排污的过滤器，其特征在于，过滤器筒体(1)的外壁上设置有吊耳(13)。
  9. 根据权利要求1所述的可在线排污的过滤器，其特征在于，关断系统包括第一关断阀(6)及第二关断阀(7)。
  10. 一种可在线排污的过滤器的工作方法，其特征在于，包括以下步骤：
    工质经滤网(3)的入口进入到滤网(3)中，再经滤网(3)过滤后经过滤器筒体(1)的出口排出，工质中的颗粒杂质被滤网(3)过滤，当滤网(3)前后的压差大于预设值时，则打开关断系统，使得过滤器筒体(1)内部与引出管(4)的颗粒杂质出口(8)之间形成压力差，在该压力差的作用下，通过过滤器筒体(1)内的工质对滤网(3)进行冲洗，最终使得滤网(3)上的颗粒杂质通过引出管(4)的颗粒杂质出口(8)排出。
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