RO membrane fault detection system in pipeline direct drinking water process

Abstract

The utility model provides an RO membrane fault detection system in a pipeline direct drinking water process, which is characterized in that the input end of a raw water conductivity meter is connected with municipal tap water, the output end of the raw water conductivity meter is communicated with the inlet of a pretreatment system through a pipeline, and the outlet of the pretreatment system is communicated with the input end of a high-pressure pump through a pipeline; the output end of the high-pressure pump is communicated with an inlet of the RO membrane through a water inlet pipeline, the water inlet pipeline is provided with a membrane front pressure sensor and a membrane front flow meter, an outlet of the RO membrane is communicated with an inlet of the pure water conductivity meter through a water outlet pipeline, and the water outlet pipeline is provided with a membrane rear pressure sensor and a membrane rear flow meter. An outlet of the pure water conductivity meter is communicated with an upper inlet of the sterile water tank through a pipeline; performance acquisition points are arranged on the pipeline, comprehensive analysis and calculation are carried out from multiple aspects of water production flow, salt removal rate and pressure drop, an accurate conclusion is obtained, the utilization rate of the membrane is improved, and it is guaranteed that the water quality of direct drinking water is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse osmosis, in particular to an RO membrane fault detection system in a pipeline direct drinking water process. Background Art

[0002] Reverse osmosis technology is a membrane separation and filtration technology that uses osmotic pressure difference as power. It has been widely used in scientific research, medical treatment, food, beverage, seawater desalination and other fields. The pore size of RO reverse osmosis membrane is less than 0.1nm, while bacteria and viruses are 5000 times larger than it. Therefore, RO membrane has high desalination rate and high removal rate of low molecular weight organic matter. Reverse osmosis technology is used to effectively remove pesticide residues, disinfection by-products, microorganisms, organic matter, heavy metal ions, etc. in water, and only water molecules and a small amount of minerals can pass through, so that the A-mes mutagenic activity test of the effluent is negative.

[0003] At present, the membrane industry divides the reverse osmosis process into three categories: high-pressure reverse osmosis (5.6MPa-10.5MPa, such as seawater desalination), low-pressure reverse osmosis (1.4MPa-4.2MPa, such as brackish water desalination) and ultra-low pressure reverse osmosis (0.5MPa-1.4MPa, such as tap water desalination). RO membranes used in piped drinking water equipment belong to ultra-low pressure reverse osmosis. During the use of civilian ultra-low pressure reverse osmosis, there is a lack of means to judge the condition of the RO membrane. After the RO membrane fails, it is necessary to consult the instruction manual and consult the manufacturer for maintenance, which is relatively cumbersome to use. Summary of the invention

[0004] The utility model aims to provide a RO membrane fault detection system in a pipeline direct drinking water process.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A RO membrane fault detection system in a pipeline direct drinking water process, characterized in that it comprises a raw water conductivity meter, a pretreatment system, a high-pressure pump, an RO membrane, a pure water conductivity meter and a sterile water tank, wherein the input end of the raw water conductivity meter is connected to municipal tap water, the output end of the raw water conductivity meter is communicated with the inlet of the pretreatment system through a pipeline, the outlet of the pretreatment system is communicated with the input end of the high-pressure pump through a pipeline, the output end of the high-pressure pump is communicated with the inlet of the RO membrane through an inlet pipeline, the inlet pipeline is provided with a pre-membrane pressure sensor and a pre-membrane flowmeter, the outlet of the RO membrane is communicated with the inlet of the pure water conductivity meter through an outlet pipeline, the outlet pipeline is provided with a post-membrane pressure sensor and a post-membrane flowmeter, the outlet of the pure water conductivity meter is communicated with the inlet of the upper part of the sterile water tank through a pipeline, and the raw water conductivity meter, the pre-membrane pressure sensor, the pre-membrane flowmeter, the post-membrane pressure sensor, the post-membrane flowmeter and the pure water conductivity meter are all electrically connected to a control cabinet.

[0007] Furthermore, wastewater generated during the operation of the RO membrane enters the concentrated water processor through a pipeline.

[0008] The utility model sets performance collection points on the pipeline, comprehensively analyzes and calculates the water production flow, desalination rate, pressure drop and other aspects to obtain accurate conclusions, improve the utilization rate of the membrane, and ensure the safety and reliability of the direct drinking water quality. The utility model can automatically control and calculate through the PLC program, which is convenient for direct drinking water users to use and avoids the cumbersome procedures of checking the instruction manual and consulting the manufacturer every time a fault occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the system structure of the utility model.

[0010] Reference numerals:

[0011] 1Pressure sensor before membrane, 2Flowmeter before membrane, 3RO membrane, 4Flowmeter after membrane,

[0012] 5 post-membrane pressure sensor, 6 sterile water tank, 7 raw water conductivity meter, 8 pre-treatment system,

[0013] 9 high pressure pump, 10 pure water conductivity meter, 11 concentrated water processor, 12 control cabinet. DETAILED DESCRIPTION

[0014] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] The utility model discloses a RO membrane fault detection system in a pipeline direct drinking water process. Figure 1 As shown, it includes a raw water conductivity meter 7, a pretreatment system 8, a high-pressure pump 9, an RO membrane 3, a pure water conductivity meter 10 and a sterile water tank 6. The input end of the raw water conductivity meter 7 is connected to municipal tap water, the output end of the raw water conductivity meter 7 is connected to the inlet of the pretreatment system 8 through a pipeline, and the outlet of the pretreatment system 8 is connected to the input end of the high-pressure pump 9 through a pipeline.

[0016] The output end of the high-pressure pump 9 is connected to the inlet of the RO membrane 3 through the water inlet pipeline, and the water inlet pipeline is provided with a pre-membrane pressure sensor 1 and a pre-membrane flowmeter 2. The wastewater in the working process of the RO membrane 3 enters the concentrated water processor 11 through the pipeline, and the concentrated water processor 11 outputs the treated concentrated water to the outside. The outlet of the RO membrane 3 is connected to the inlet of the pure water conductivity meter 10 through the water outlet pipeline, and the water outlet pipeline is provided with a post-membrane pressure sensor 5 and a post-membrane flowmeter 4.

[0017] like Figure 1 As shown, the outlet of the pure water conductivity meter 10 is connected to the inlet at the top of the sterile water tank 6 through a pipeline, and the raw water conductivity meter 7, the pre-membrane pressure sensor 1, the pre-membrane flowmeter 2, the post-membrane pressure sensor 5, the post-membrane flowmeter 4 and the pure water conductivity meter 10 are all electrically connected to the control cabinet 12.

[0018] The pre-membrane flowmeter 2 and the post-membrane flowmeter 4 detect the water flow rate of the RO membrane 3 in real time, and transmit the collected signal to the control cabinet 12 as a basis for judging the change of the water output after standardization;

[0019] The raw water conductivity meter 7 and the pure water conductivity meter 10 detect the salt content in the water in real time, and transmit the collected signals to the control cabinet 12 as the basis for the change of desalination rate;

[0020] The membrane front pressure sensor 11 and the membrane rear pressure sensor 55 detect the pressures before and after the membrane in real time and transmit the collected signals to the control cabinet 12 as the basis for the pressure drop change.

[0021] During use, there are three types of RO membrane 3 failures:

[0022] After standardization, water production decreased by 10%-15%;

[0023] After standardization, the desalination rate decreased by 10%-15%;

[0024] After standardization, the pressure drop across the membrane increases by 10%-15%.

[0025] Connect municipal tap water to the power supply of the equipment, and when the liquid level and pressure reach the set values ​​of the controller in the control cabinet 12, the system of the utility model starts working. After the whole machine enters the working state, adjust the system pressure (before the membrane) to 0.7~0.8Mpa, and the water pressure before the membrane (displayed by the pressure sensor before the membrane 1) and the residual chlorine value meet the design requirements of the RO membrane 3. If the inlet water temperature, PH, pressure, and TDS are stable and the pretreatment module operates without faults, the control cabinet 12 analyzes and calculates the collected data.

[0026] If the analysis result shows that the water production volume drops beyond the set value, the desalination rate drops, and the pressure drop increases, the system will remind you to clean the RO membrane 3 component; if the analysis result shows that the water production volume drops beyond the set value, the desalination rate increases, and the pressure drop remains unchanged, the system will remind you to replace the membrane component;

[0027] 2) If the analysis result shows that the desalination rate drops beyond the set value, the produced water flow rate remains unchanged, and the pressure drop remains unchanged, the system will remind you to replace the O-ring of RO membrane 3; if the analysis result shows that the desalination rate drops beyond the set value, the produced water flow rate increases, and the pressure drop remains unchanged, the system will remind you to replace the original RO membrane 3;

[0028] 3) If the analysis result shows that the pressure drop increases beyond the set value, the water production flow rate decreases, and the desalination rate remains unchanged, the system will remind you to clean the RO membrane 3 original.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A RO membrane fault detection system in pipeline direct drinking water process, It is characterized in that It includes a raw water conductivity meter, a pretreatment system, a high-pressure pump, an RO membrane, a pure water conductivity meter and a sterile water tank. The input end of the raw water conductivity meter is connected to municipal tap water, the output end of the raw water conductivity meter is connected to the inlet of the pretreatment system through a pipeline, the outlet of the pretreatment system is connected to the input end of the high-pressure pump through a pipeline, the output end of the high-pressure pump is connected to the inlet of the RO membrane through an inlet pipeline, the inlet pipeline is provided with a pre-membrane pressure sensor and a pre-membrane flowmeter, the outlet of the RO membrane is connected to the inlet of the pure water conductivity meter through an outlet pipeline, the outlet pipeline is provided with a post-membrane pressure sensor and a post-membrane flowmeter, the outlet of the pure water conductivity meter is connected to the inlet of the upper part of the sterile water tank through a pipeline, and the raw water conductivity meter, the pre-membrane pressure sensor, the pre-membrane flowmeter, the post-membrane pressure sensor, the post-membrane flowmeter and the pure water conductivity meter are all electrically connected to the control cabinet.

2. The RO membrane fault detection system in the pipeline direct drinking water process according to claim 1, It is characterized in that The wastewater generated during the operation of the RO membrane enters the concentrated water treatment device through a pipeline.

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