CN110585928A - Multi-section internal circulation and washing and cleaning device of membrane system - Google Patents
Multi-section internal circulation and washing and cleaning device of membrane system Download PDFInfo
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- CN110585928A CN110585928A CN201910578645.6A CN201910578645A CN110585928A CN 110585928 A CN110585928 A CN 110585928A CN 201910578645 A CN201910578645 A CN 201910578645A CN 110585928 A CN110585928 A CN 110585928A
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- 239000012528 membrane Substances 0.000 title claims abstract description 157
- 238000004140 cleaning Methods 0.000 title claims abstract description 108
- 238000005406 washing Methods 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 241
- 238000011010 flushing procedure Methods 0.000 claims abstract description 66
- 239000003814 drug Substances 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims description 46
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 239000003899 bactericide agent Substances 0.000 description 2
- 239000008364 bulk solution Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001728 nano-filtration Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/022—Membrane sterilisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明公开一种膜系统的多段内循环和冲洗清洗装置，其包括原水管、产水管、浓水管和至少两个膜组件，所述膜组件具有原水入口、产水出口和浓水出口，还包括清洗管路，所述清洗管路包括与每个所述膜组件的原水入口连通的清洗进水管，以及设置在每个所述膜组件的原水入口端的药剂加入口和冲洗进水阀，由于本发明通过增加清洗管路，并在每个膜组件的原水入口端设置了药剂加入口，从而使得每个膜组件能加入单独的药剂进行针对清洗，提高药剂使用效率避免浪费。
The invention discloses a multi-stage internal circulation and flushing cleaning device of a membrane system, which includes a raw water pipe, a produced water pipe, a concentrated water pipe and at least two membrane modules, the membrane module has a raw water inlet, a produced water outlet and a concentrated water outlet, and Including a cleaning pipeline, the cleaning pipeline includes a cleaning water inlet pipe communicated with the raw water inlet of each of the membrane modules, and a medicament inlet and a flushing water inlet valve arranged at the raw water inlet of each of the membrane modules, due to In the present invention, by adding cleaning pipelines and setting a medicament inlet at the raw water inlet of each membrane module, a separate medicament can be added to each membrane module for targeted cleaning, improving the use efficiency of the medicament and avoiding waste.
Description
技术领域technical field
本发明涉及一种膜系统的多段内循环和冲洗清洗装置。The invention relates to a multi-stage internal circulation and flushing cleaning device of a membrane system.
背景技术Background technique
膜系统，例如纳滤、反渗透等膜系统，已广泛应用于物料分离、纯化、精致领域，特别是在水处理领域，纳滤反渗透已得到广泛应用。而膜法水处理的实践中，往往因为在膜与本体溶液界面或临近膜界面区域浓度越来越高，在浓度梯度作用下，溶质又会由膜面向本体溶液扩散，形成边界层，使流体阻力与局部渗透压增加，从而导致溶剂透过通量下降，此种现象称为浓差极化现象。克服这种现象的主要手段即通过增加膜表面错流减少膜界面区域溶质浓度累积。此外膜法水处理还受到膜污染问题的困扰，且往往在串联膜组件的前端与后端污染情况不同（例如，在膜法中水回用中，前端膜组件通常为生物污染、后端膜组件通常为物理结垢污染），克服此问题的手段通常为增加运行阶段的加药系统，并通过定期膜组件化学清洗解决。Membrane systems, such as nanofiltration and reverse osmosis, have been widely used in the fields of material separation, purification, and refinement, especially in the field of water treatment, where nanofiltration and reverse osmosis have been widely used. In the practice of membrane water treatment, often because the concentration at the interface between the membrane and the bulk solution or near the membrane interface is getting higher and higher, under the action of the concentration gradient, the solute will diffuse from the membrane to the bulk solution to form a boundary layer, making the fluid The resistance and local osmotic pressure increase, which leads to the decrease of solvent permeation flux. This phenomenon is called concentration polarization. The main means to overcome this phenomenon is to reduce the accumulation of solute concentration in the membrane interface region by increasing the cross-flow on the membrane surface. In addition, membrane water treatment is also plagued by membrane fouling, and the pollution conditions at the front end and back end of the series membrane modules are often different (for example, in membrane water reuse, the front end membrane modules are usually bio-fouled, and the rear end membrane Components are usually physically fouled), and the means to overcome this problem is usually to increase the dosing system during the operation phase and solve it through regular chemical cleaning of the membrane components.
现有的多段膜系统通常存在以下问题：1.现有的多段膜系统只能通过进水端加入清洗药剂，而多段膜中不同的污染情况采用统一的药剂清洗，其清洗效果较差。2.现有的多段膜系统，低压冲洗、高压冲洗过程均从第一段膜组件进水端进水，经过多段膜组件后在末端冲洗水质、水压衰减严重，冲洗效果不好，或为了良好的冲洗过程，需延长冲洗时间。3.现有的多段膜系统，对于多段膜系统，清洗过程同样从整个膜系统进水端进水、无法针对特定某段膜组件进行针对性的药剂配比，药剂浪费、清洗过程无法达到对症下药。4.循环回流管路上没有配置手动阀，对于循环流量只可通过循环泵、循环泵出口阀调整，无法完全准确调整循环流量与过膜压力。The existing multi-stage membrane system usually has the following problems: 1. The existing multi-stage membrane system can only add cleaning agents through the water inlet, and the different pollution conditions in the multi-stage membranes are cleaned with a unified agent, and the cleaning effect is poor. 2. In the existing multi-stage membrane system, the process of low-pressure flushing and high-pressure flushing all enters the water from the water inlet of the first stage of the membrane module. For a good rinse process, a longer rinse time is required. 3. For the existing multi-section membrane system, for the multi-section membrane system, the cleaning process also enters the water from the water inlet of the entire membrane system, and it is impossible to carry out targeted chemical ratio for a specific membrane module, waste of chemical reagents, and the cleaning process cannot achieve the right medicine . 4. There is no manual valve on the circulation return line, the circulation flow can only be adjusted by the circulation pump and the outlet valve of the circulation pump, and the circulation flow and membrane pressure cannot be adjusted completely and accurately.
发明内容Contents of the invention
本发明的目的是提供一种能够正对不同段的膜组件分别加药清洗的膜系统的多段内循环和冲洗清洗装置The purpose of the present invention is to provide a multi-stage internal circulation and flushing cleaning device for a membrane system capable of adding medicine to and cleaning membrane modules in different sections.
为达到上述目的，本发明采用的技术方案是：一种膜系统的多段内循环和冲洗清洗装置，其包括原水管、产水管、浓水管和至少两个膜组件，所述膜组件具有原水入口、产水出口和浓水出口，还包括清洗管路，所述清洗管路包括与每个所述膜组件的原水入口连通的清洗进水管，以及设置在每个所述膜组件的原水入口端的药剂加入口和冲洗进水阀。In order to achieve the above object, the technical solution adopted by the present invention is: a multi-stage internal circulation and flushing cleaning device of a membrane system, which includes a raw water pipe, a produced water pipe, a concentrated water pipe and at least two membrane modules, and the membrane module has a raw water inlet , a product water outlet and a concentrated water outlet, and also include a cleaning pipeline, and the cleaning pipeline includes a cleaning water inlet pipe communicated with the raw water inlet of each of the membrane modules, and a raw water inlet pipe arranged at the raw water inlet of each of the membrane modules The agent is added to the inlet and flushes the water inlet valve.
优选地，所述膜组件设置有两个，分别为一段膜组件和二段膜组件，所述一段膜组件的浓水出口连通所述二段膜组件的原水入口，所述产水管分别连通所述一段膜组件的产水出口和所述二段膜组件的产水出口，所述浓水管连通所述二段膜组件的浓水出口，所述清洗管路还包括清洗排水管和设置在所述清洗进水管的进水端的清洗泵，所述清洗进水管分别连通所述一段膜组件的原水入口和所述二段膜组件的原水入口，所述清洗排水管分别连通所述一段膜组件的浓水出口和所述二段膜组件的浓水出口。Preferably, the membrane modules are provided with two, respectively, a first-stage membrane module and a second-stage membrane module, the concentrated water outlet of the first-stage membrane module is connected to the raw water inlet of the second-stage membrane module, and the water production pipes are connected to the The produced water outlet of the first-stage membrane module and the water-produced outlet of the second-stage membrane module, the concentrated water pipe is connected to the concentrated water outlet of the second-stage membrane module, and the cleaning pipeline also includes a cleaning drain pipe and is arranged on the The cleaning pump at the water inlet end of the cleaning water inlet pipe is described. The cleaning water inlet pipe is respectively connected to the raw water inlet of the first-stage membrane module and the raw water inlet of the second-stage membrane module, and the cleaning drain pipe is connected to the raw water inlet of the first-stage membrane module. concentrated water outlet and the concentrated water outlet of the second-stage membrane module.
进一步优选地，所述清洗进水管与所述一段膜组件的原水入口之间设置有一段冲洗进水阀，所述清洗进水管与所述二段膜组件的原水入口之间设置有二段冲洗进水阀；所述清洗排水管与所述一段膜组件的浓水出口之间设置有一段浓水阀，所述清洗排水管与所述二段膜组件的浓水出口之间设置有二段浓水阀；所述清洗排水管与所述一段膜组件的浓水出口之间设置有一段冲洗排放阀，所述清洗排水管与所述二段膜组件的浓水出口之间设置有二段冲洗排放阀，所述产水管与所述一段膜组件的产水出口之间设置有一段产水止回阀和一段产水阀，所述产水管与所述二段膜组件的产水出口之间设置有二段产水止回阀和二段产水阀。Further preferably, a first-stage flushing water inlet valve is provided between the cleaning water inlet pipe and the raw water inlet of the first-stage membrane module, and a second-stage flushing valve is arranged between the cleaning water inlet pipe and the raw water inlet of the second-stage membrane module. Water inlet valve; a section of concentrated water valve is arranged between the cleaning drain pipe and the concentrated water outlet of the first-stage membrane module, and a second-stage concentrated water valve is arranged between the cleaning drain pipe and the concentrated water outlet of the second-stage membrane module Concentrated water valve; a section of flushing discharge valve is arranged between the cleaning drain pipe and the concentrated water outlet of the first-stage membrane module, and a second-stage flushing discharge valve is arranged between the cleaning drain pipe and the concentrated water outlet of the second-stage membrane module A flushing discharge valve, a section of water production check valve and a section of water production valve are arranged between the water production pipe and the water production outlet of the first-stage membrane module, between the water production pipe and the water production outlet of the second-stage membrane module There are two-stage water production check valve and two-stage water production valve in between.
进一步优选地，还包括分别连通所述一段膜组件的产水出口和所述一段膜组件的浓水出口的一段循环管路，所述一段循环管路上串联设置有一段循环泵和一段药剂加入口。Further preferably, it also includes a section of circulation pipeline connecting the product water outlet of the first section of membrane module and the concentrated water outlet of the first section of membrane module respectively, and a section of circulation pump and a section of medicament inlet are arranged in series on the section of circulation pipeline .
进一步优选地，还包括连通所述二段膜组件的浓水出口与所述一段循环泵的入口的过滤循环管道。Further preferably, it also includes a filtration circulation pipeline connecting the concentrated water outlet of the second-stage membrane module and the inlet of the first-stage circulation pump.
进一步优选地，所述一段循环泵的出口处设置有一段循环泵出口阀和一段止回阀，所述一段药剂加入口设置在所述一段循环泵的出口端。Further preferably, a first-stage circulation pump outlet valve and a first-stage check valve are provided at the outlet of the one-stage circulation pump, and the one-stage medicament inlet is provided at the outlet end of the one-stage circulation pump.
进一步优选地，还包括分别连通所述二段膜组件的产水出口和所述二段膜组件的浓水出口的二段循环管路，所述二段循环管路上串联设置有二段循环泵和二段药剂加入口。Further preferably, it also includes a second-stage circulation pipeline connecting the product water outlet of the second-stage membrane module and the concentrated water outlet of the second-stage membrane module respectively, and a second-stage circulation pump is arranged in series on the second-stage circulation pipeline And the second-stage medicine is added to the mouth.
进一步优选地，所述二段循环泵的出口处设置有二段循环泵出口阀和二段止回阀，所述二段药剂加入口设置在所述二段循环泵的出口端。Further preferably, a second-stage circulation pump outlet valve and a second-stage check valve are provided at the outlet of the second-stage circulation pump, and the second-stage medicament inlet is provided at the outlet end of the second-stage circulation pump.
进一步优选地，所述原水管上依次设置有过滤器进水阀、保安过滤器、滤器出口阀、高压泵、高压泵止回阀、系统进水阀和高压泵出口阀；所述浓水管上依次设置有浓水调节阀和浓水电动阀。Further preferably, a filter inlet valve, a security filter, a filter outlet valve, a high-pressure pump, a high-pressure pump check valve, a system water inlet valve, and a high-pressure pump outlet valve are sequentially arranged on the raw water pipe; A concentrated water regulating valve and a concentrated water electric valve are arranged in sequence.
优选地，所述膜组件包括多个并联设置的膜单元。Preferably, the membrane module includes a plurality of membrane units arranged in parallel.
由于上述技术方案运用，本发明与现有技术相比具有下列优点：Due to the use of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:
由于本发明通过增加每段的循环泵，每段浓水回流阀、每段的清洗/冲洗入口、每段的加药口，精确控制各端膜组件的循环压力、循环流量、加药量、加药种类、清洗药剂种类、冲洗频率、冲洗强度，达到膜系统的精细化运行。Since the present invention precisely controls the circulation pressure, circulation flow rate, dosing amount, The type of dosing, the type of cleaning agent, the frequency of washing, and the intensity of washing can achieve the refined operation of the membrane system.
附图说明Description of drawings
附图1为本发明的原理示意图。Accompanying drawing 1 is schematic diagram of principle of the present invention.
以上附图中：11、一段膜组件；12、二段膜组件；21、原水管；22、产水管；23、浓水管；24、清洗进水管；25、清洗排水管；26、一段循环管路；27、二段循环管路；31、一段冲洗进水阀；32、一段浓水阀；33、一段冲洗排放阀；34、一段产水止回阀；35、一段产水阀；36、一段循环泵出口阀；37、一段止回阀；41、二段冲洗进水阀；42、二段浓水阀；43、二段冲洗排放阀；44、二段产水止回阀；45、二段产水阀；46、二段循环泵出口阀；47、二段止回阀；51、一段药剂加入口；52、二段药剂加入口；61、一段循环泵；62、二段循环泵；71、过滤器进水阀；72、保安过滤器；73、滤器出口阀；74、高压泵；75、高压泵止回阀；76、系统进水阀；77、高压泵出口阀；81、浓水调节阀；82、浓水电动阀；91、清洗回流阀；92、冲洗回流阀；93、产水清洗回流阀；94、产水阀。In the above drawings: 11. One-stage membrane module; 12. Two-stage membrane module; 21. Raw water pipe; 22. Produced water pipe; 23. Concentrated water pipe; 24. Cleaning water inlet pipe; 27. Two-stage circulation pipeline; 31. One-stage flushing water inlet valve; 32. One-stage concentrated water valve; 33. One-stage flushing discharge valve; 34. One-stage water production check valve; 35. One-stage water production valve; 36. 1st stage circulating pump outlet valve; 37. 1st stage check valve; 41. 2nd stage flushing water inlet valve; 42. 2nd stage concentrated water valve; 43. 2nd stage flushing discharge valve; 44. 2nd stage water production check valve; 45. Second-stage water production valve; 46. Second-stage circulation pump outlet valve; 47. Second-stage check valve; 51. One-stage medicament inlet; 52. Second-stage medicament inlet; 61. One-stage circulation pump; 62. Second-stage circulation pump ;71, filter water inlet valve; 72, security filter; 73, filter outlet valve; 74, high pressure pump; 75, high pressure pump check valve; 76, system water inlet valve; 77, high pressure pump outlet valve; 81, Concentrated water regulating valve; 82. Concentrated water electric valve; 91. Cleaning backflow valve; 92. Flush backflow valve; 93. Product water cleaning backflow valve; 94. Product water valve.
具体实施方式Detailed ways
下面结合附图所示的实施例对本发明作进一步描述：The present invention will be further described below in conjunction with the embodiment shown in accompanying drawing:
参见附图1所示，一种膜系统的多段内循环和冲洗清洗装置，其包括一段膜组件11、二段膜组件12、原水箱、产水箱、浓水箱、清洗水箱、连接原水箱和一段膜组件11的原水入口的原水管21、将产水箱分别与一段膜组件11的产水出口和二段膜组件12的产水出口连通的产水管22、连通浓水箱与二段膜组件12的浓水出口的浓水管23、将清洗水箱分别与一段膜组件11的原水入口和二段膜组件12的原水入口连通的清洗进水管24，以及设置在清洗进水管24与清洗水箱之间的清洗泵（图中未表示），将清洗水箱分别与一段膜组件11的浓水出口和二段膜组件12的浓水出口连通的清洗排水管25。其中，一段膜组件11、二段膜组件12均包含多个并联设置的膜单元。Referring to Figure 1, a multi-stage internal circulation and flushing cleaning device of a membrane system includes a first-stage membrane module 11, a second-stage membrane module 12, a raw water tank, a produced water tank, a concentrated water tank, a cleaning water tank, connecting the raw water tank and a first-stage The raw water pipe 21 of the raw water inlet of the membrane module 11, the water production pipe 22 connecting the water production tank with the water production outlet of the first-stage membrane module 11 and the water production outlet of the second-stage membrane module 12, and the connection between the concentrated water tank and the second-stage membrane module 12 The concentrated water pipe 23 at the concentrated water outlet, the cleaning water inlet pipe 24 connecting the cleaning water tank with the raw water inlet of the first-stage membrane module 11 and the raw water inlet of the second-stage membrane module 12, and the cleaning water inlet pipe 24 arranged between the cleaning water tank and the cleaning water tank. The pump (not shown in the figure), the cleaning drain pipe 25 that connects the cleaning water tank with the concentrated water outlet of the first-stage membrane module 11 and the concentrated water outlet of the second-stage membrane module 12 respectively. Wherein, the first-stage membrane module 11 and the second-stage membrane module 12 both include a plurality of membrane units arranged in parallel.
具体地，清洗进水管24与一段膜组件11的原水入口之间设置有一段冲洗进水阀31，清洗进水管24与二段膜组件12的原水入口之间设置有二段冲洗进水阀41；清洗排水管25与一段膜组件11的浓水出口之间设置有一段浓水阀32，清洗排水管25与二段膜组件12的浓水出口之间设置有二段浓水阀42；清洗排水管25与一段膜组件11的浓水出口之间设置有一段冲洗排放阀33，清洗排水管25与二段膜组件12的浓水出口之间设置有二段冲洗排放阀43，产水管22与一段膜组件11的产水出口之间设置有一段产水止回阀34和一段产水阀35，产水管22与二段膜组件12的产水出口之间设置有二段产水止回阀44和二段产水阀45。Specifically, a first-stage flushing water inlet valve 31 is provided between the cleaning water inlet pipe 24 and the raw water inlet of the first-stage membrane module 11, and a second-stage flushing water inlet valve 41 is arranged between the cleaning water inlet pipe 24 and the raw water inlet of the second-stage membrane module 12. A section of concentrated water valve 32 is arranged between the cleaning drain pipe 25 and the concentrated water outlet of the first section of membrane assembly 11, and a second section of concentrated water valve 42 is arranged between the cleaning drain pipe 25 and the concentrated water outlet of the second section of membrane assembly 12; A first-stage flushing discharge valve 33 is provided between the drain pipe 25 and the concentrated water outlet of the first-stage membrane module 11, a second-stage flushing discharge valve 43 is provided between the cleaning drain pipe 25 and the concentrated water outlet of the second-stage membrane module 12, and the water production pipe 22 A first-stage water production check valve 34 and a first-stage water production valve 35 are set between the water production outlet of the first-stage membrane module 11, and a second-stage water production check valve is arranged between the water production pipe 22 and the water production outlet of the second-stage membrane module 12 Valve 44 and two-stage water production valve 45.
本实施例的装置还包括分别连通一段膜组件11的产水出口和一段膜组件11的浓水出口的一段循环管路26，一段循环管路26上串联设置有一段循环泵61和一段药剂加入口51，以及连通二段膜组件12的浓水出口与一段循环泵61的入口的过滤循环管道。其中，一段循环泵61的出口处设置有一段循环泵出口阀36和一段止回阀37，一段药剂加入口51设置在一段循环泵61的出口端。The device of this embodiment also includes a section of circulation pipeline 26 that communicates with the water production outlet of one section of membrane module 11 and the concentrated water outlet of one section of membrane module 11 respectively, and a section of circulation pump 61 and a section of medicament feeding port 51, and the filtration circulation pipeline connecting the concentrated water outlet of the second-stage membrane module 12 and the inlet of the first-stage circulation pump 61. Wherein, the outlet of the first-stage circulation pump 61 is provided with a first-stage circulation pump outlet valve 36 and a first-stage check valve 37 , and the first-stage medicament inlet 51 is arranged at the outlet end of the first-stage circulation pump 61 .
本实施例的装置还包括分别连通二段膜组件12的产水出口和二段膜组件12的浓水出口的二段循环管路27，二段循环管路27上串联设置有二段循环泵62和二段药剂加入口52。其中，二段循环泵62的出口处设置有二段循环泵出口阀46和二段止回阀47，二段药剂加入口52设置在二段循环泵62的出口端。The device of this embodiment also includes a second-stage circulation pipeline 27 that communicates with the water production outlet of the second-stage membrane module 12 and the concentrated water outlet of the second-stage membrane module 12 respectively, and a second-stage circulation pump is arranged in series on the second-stage circulation pipeline 27 62 and the second-stage medicament add port 52. Wherein, the outlet of the second-stage circulating pump 62 is provided with a second-stage circulating pump outlet valve 46 and a second-stage check valve 47 , and the second-stage medicament inlet 52 is arranged at the outlet of the second-stage circulating pump 62 .
在本实施例中，原水管21上依次设置有过滤器进水阀71、保安过滤器72、滤器出口阀73、高压泵74、高压泵止回阀75、系统进水阀76和高压泵出口阀77；浓水管23上依次设置有浓水调节阀81和浓水电动阀82。In this embodiment, a filter inlet valve 71, a security filter 72, a filter outlet valve 73, a high-pressure pump 74, a high-pressure pump check valve 75, a system inlet valve 76, and a high-pressure pump outlet are sequentially arranged on the raw water pipe 21. The valve 77; the concentrated water pipe 23 is provided with a concentrated water regulating valve 81 and a concentrated water electric valve 82 in sequence.
此外，清洗排水管25与清洗水箱之间设置有清洗回流阀91，清洗排水管25还通过冲洗回流阀92与原水箱相连通。产水管22与产水箱之间设置有产水阀94，产水管22与清洗水箱之间设置有产水清洗回流阀93。In addition, a cleaning backflow valve 91 is provided between the cleaning drainage pipe 25 and the cleaning water tank, and the cleaning drainage pipe 25 is also connected to the raw water tank through the flushing backflow valve 92 . A water production valve 94 is provided between the water production pipe 22 and the water production tank, and a production water cleaning return valve 93 is provided between the production water pipe 22 and the cleaning water tank.
本实施例具有以下工作状态：This embodiment has the following working states:
1、膜系统运行状态，打开过滤器进水阀71、过滤器出口阀73、系统进水阀76、高压泵出口阀77、一段循环泵出口阀36、一段浓水阀32、二段循环泵出口阀46、二段浓水阀42、浓水调节阀81、浓水电动阀82、一段产水阀35、二段产水阀45、产水阀94，其他阀门关闭。原水自原水池进入原水管21，通过开高压泵74、一段循环泵61、二段循环泵62的转速，及一段浓水阀32、二段浓水阀42开度的调节控制各段运行压力、流量，使得原水通过一段膜组件11和二段膜组件12进行过滤。通过浓水调节阀81开度调节系统运行回收率。1. In the operating state of the membrane system, open the filter inlet valve 71, the filter outlet valve 73, the system inlet valve 76, the high pressure pump outlet valve 77, the outlet valve 36 of the first-stage circulating pump, the first-stage concentrated water valve 32, and the second-stage circulating pump Outlet valve 46, second-stage concentrated water valve 42, concentrated water regulating valve 81, concentrated water electric valve 82, first-stage water production valve 35, second-stage water production valve 45, water production valve 94, and other valves are closed. The raw water enters the raw water pipe 21 from the raw water pool, and controls the operating pressure of each stage by turning on the high-pressure pump 74, the speed of the first-stage circulating pump 61, and the second-stage circulating pump 62, and adjusting the opening of the first-stage concentrated water valve 32 and the second-stage concentrated water valve 42. , flow rate, so that the raw water is filtered through the first-stage membrane module 11 and the second-stage membrane module 12 . The operating recovery rate of the system is regulated through the opening degree of the concentrated water regulating valve 81 .
在膜系统运行状态时，本实施例通过一段药剂加入口51、二段药剂加入口52分别加入各段运行使用的药剂。一段药剂加入口51、二段药剂加入口52都设置有止回阀。例如，在一段药剂加入口51加入大量杀菌剂少量阻垢剂，抑制生物结垢；在二段药剂加入口52加入大量阻垢剂和少量杀菌，抑制无机物结垢。In the operating state of the membrane system, in this embodiment, the chemicals used in the operation of each stage are respectively added through the first-stage agent inlet 51 and the second-stage agent inlet 52 . Both the first-stage medicament inlet 51 and the second-stage medicament inlet 52 are provided with check valves. For example, add a large amount of bactericide and a small amount of antiscalant to the agent inlet 51 of the first stage to inhibit biological scaling; add a large amount of antiscalant and a small amount of bactericide to the agent inlet 52 of the second stage to inhibit the scaling of inorganic substances.
2、高压冲洗状态，其包括一段高压冲洗状态和二段高压冲洗状态。2. The state of high-pressure flushing, which includes a stage of high-pressure flushing and a stage of high-pressure flushing.
一段高压冲洗状态，即在膜系统运行状态时打开一段冲洗排放阀33、冲洗回流阀92；One-stage high-pressure flushing state, that is, open one-stage flushing discharge valve 33 and flushing return valve 92 when the membrane system is running;
二段高压冲洗状态，即在膜系统运行状态时打开二段冲洗排放阀43、冲洗回流阀92。In the second-stage high-pressure flushing state, the second-stage flushing discharge valve 43 and the flushing return valve 92 are opened when the membrane system is in operation.
高压冲洗状态时将冲洗后的水流通过清洗排水管25送入原水箱中。During the high-pressure flushing state, the water flow after flushing is sent into the raw water tank through the cleaning drain pipe 25 .
高压冲洗状态与膜系统运行状态下的膜单元的管内水流流速、压力可通过变频器控制一段循环泵61和二段循环泵62运行频率自动实现。The flow rate and pressure of the water flow in the membrane unit in the high-pressure flushing state and the operating state of the membrane system can be automatically realized by controlling the operating frequency of the first-stage circulating pump 61 and the second-stage circulating pump 62 through the frequency converter.
3、低压冲洗状态，具体地包括一段低压冲洗状态和二段低压冲洗状态。3. The low-pressure flushing state, specifically including the first-stage low-pressure flushing state and the second-stage low-pressure flushing state.
一段低压冲洗状态时，一段冲洗进水阀31、一段冲洗排放阀33、冲洗回流阀92，以及清洗泵打开，其他阀门关闭、水泵停机；In the state of low-pressure flushing, the first-stage flushing water inlet valve 31, the first-stage flushing discharge valve 33, the flushing return valve 92, and the cleaning pump are turned on, other valves are closed, and the water pump is stopped;
二段低压冲洗状态时，二段冲洗进水阀41、二段冲洗排放阀43、冲洗回流阀92，以及清洗泵打开，其他阀门关闭、水泵停机。During the second-stage low-pressure flushing state, the second-stage flushing water inlet valve 41, the second-stage flushing discharge valve 43, the flushing return valve 92, and the cleaning pump are opened, other valves are closed, and the water pump is shut down.
在低压冲洗状态时，清洗水箱内的水通过清洗泵进入一段膜组件11、二段膜组件12，冲洗后的水流通过清洗排水管25送入原水箱中。When in the low-pressure flushing state, the water in the cleaning water tank enters the first-stage membrane module 11 and the second-stage membrane module 12 through the cleaning pump, and the water flow after flushing is sent into the raw water tank through the cleaning drain pipe 25 .
4、化学清洗状态，其包括一段化学清洗和二段化学清洗。4. The state of chemical cleaning, which includes one-stage chemical cleaning and two-stage chemical cleaning.
一段化学清洗状态时，一段冲洗进水阀31、一段冲洗排放阀33、清洗回流阀91、产水清洗回流阀93，以及清洗泵打开，其他阀门关闭、水泵停机；In the stage of chemical cleaning, the first-stage flushing water inlet valve 31, the first-stage flushing discharge valve 33, the cleaning return valve 91, the produced water cleaning return valve 93, and the cleaning pump are turned on, other valves are closed, and the water pump is stopped;
进行二段化学清洗状态时，二段冲洗进水阀41、二段冲洗排放阀43、清洗回流阀91、产水清洗回流阀93，以及清洗泵打开，其他阀门关闭、水泵停机。When carrying out the second-stage chemical cleaning state, the second-stage flushing water inlet valve 41, the second-stage flushing discharge valve 43, the cleaning return valve 91, the produced water cleaning return valve 93, and the cleaning pump are opened, other valves are closed, and the water pump is shut down.
在化学清洗状态时，通过清洗泵将清洗池中的水流泵入一段膜组件11、二段膜组件12，并通过清洗回流阀91、产水清洗回流阀93将清洗水回流至清洗池，形成清洗液循环。In the chemical cleaning state, the water flow in the cleaning pool is pumped into the first-stage membrane module 11 and the second-stage membrane module 12 through the cleaning pump, and the cleaning water is returned to the cleaning pool through the cleaning backflow valve 91 and the product water cleaning backflow valve 93, forming The cleaning fluid circulates.
在化学清洗状态时，可根据每段的污染情况，清洗池或者一段药剂加入口51、二段药剂加入口52打入不同的清洗药剂。例如在一段清洗时打入碱，清洗生物污染；在二段清洗时打入酸，清洗无机物结垢。In the state of chemical cleaning, according to the pollution situation of each section, different cleaning agents can be injected into the cleaning tank or the agent inlet 51 of the first stage and the agent inlet 52 of the second stage. For example, alkali is injected into the first-stage cleaning to clean biological contamination; acid is injected into the second-stage cleaning to clean inorganic scaling.
本实施例相比现有技术，具有以下优点：Compared with the prior art, this embodiment has the following advantages:
1、一段膜组件11、二段膜组件12可以根据需要打入特定药剂分别清洗。1. The first-stage membrane module 11 and the second-stage membrane module 12 can be washed with specific chemicals as required.
2、一段膜组件11、二段膜组件12具有各自的循环泵，能够精确控制各段膜组件的循环压力，达到膜系统的精细化运行。2. The first-stage membrane module 11 and the second-stage membrane module 12 have their own circulation pumps, which can precisely control the circulation pressure of each membrane module and achieve the refined operation of the membrane system.
3、能分别对一段膜组件11或二段膜组件12加入单独的药剂进行针对清洗，提高药剂使用效率避免浪费。3. It is possible to add separate chemicals to the first-stage membrane module 11 or the second-stage membrane module 12 for targeted cleaning, improving the efficiency of chemical use and avoiding waste.
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.
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