Process description of reverse osmosis pure water equipment for pharmaceutical use

1、 Raw water tank

Function: Overcome the instability of water supply in the pipeline network and ensure the stable and continuous water supply of the entire system;At the same time, it also provides a guarantee for the long-term reliable performance of various devices.

Selection:PEMaterial or stainless steel water tank.

Control: The water tank is equipped with a high water level float valve and a low water level switch. It has high reliability,low price,simple structure,Advantages such as easy installation. When the water level is at a high level, the float valve closes and stops water intake. When the water level is at a low level, the high level float valve opens and begins to inject water into the water tank. At the same time, the low water level switch is disconnected, and the booster pump stops working.

2、 Raw water pump

Function: Provide necessary working pressure for pre-processing equipment.

Selection: Design pressure drop for each device based on pre-processing(Maximum pressure drop per filtration device0.05Mpa)And the pressure before the high-pressure pump cannot be less than0.5Kg/cm2Determine the working pressure of the booster pump.

Control: Use a regulating valve after the pump to adjust the pressure and inlet water volume.

3、 Activated carbon filter

Function: This process uses an activated carbon filter as a pre-treatment for the reverse osmosis device, which is very important. Reverse osmosis system requires inlet water indicatorsSDI≤5Residual chlorine<0.1mg/LTo meet its inlet requirements, it is necessary to further purify the raw water to achieve the inlet index of reverse osmosis. Installing a carbon filter in front of a reverse osmosis device has two main functions:

AAdsorb some organic matter in water with an adsorption rate of60%左右

BAbsorb residual chlorine in water. The adsorption particle size is10-20Inorganic colloids, organic colloids, and soluble organic polymer impurities in the sand filter Residual chlorine is difficult to remove. The reason why activated carbon can be used to adsorb active substances with particle sizes of around tens of angstroms is due to the presence of a large number of average pore sizes in its structure20-50The microporous and intergranular structure of activated carbon enables its surface adsorption area to reach500-2000m2/gDue to the fact that the molecular diameter of organic compounds is generally slightly smaller than20-50Therefore, activated carbon has a strong adsorption effect on organic matter. In addition, activated carbon has strong dechlorination ability. Due to the strong oxidizing properties of residual chlorine, it reacts with carbon to produce carbon dioxide and chloride ions, resulting in only a small amount of carbon loss. Therefore, activated carbon dechlorination can be used for a considerable period of time. Activated carbon not only has the above functions, but also can remove odors and pigments from water, improve water clarity. After a period of use, the adsorption capacity of activated carbon decreases and needs to be regenerated or replaced. So, after the raw water passes through the carbon filter, it can greatly improve the water quality and reduce the pollution of the reverse osmosis membrane. The treated water quality can meet the inlet water quality requirements of the reverse osmosis device(residual chlorine<0.1mg/L).

4、 Mechanical filter(Quartz sand filter)

Function: The raw water first passes through a mechanical filter and is placed inside the filter12-24Objective: To refine quartz sand and promote flocculation in raw water Suspended impurities such as body and rust are intercepted during this process. Due to the mechanical filter capturing a large amount of suspended impurities during operation, it is necessary to regularly flush and backwash the filter to ensure its normal operation.

　　1Selection: ChooseFRPmaterial(Fiberglass material)container.

Control: The backwashing operation of the mechanical filter adopts a manual controller, and the filter should be cleaned once a day with a cleaning time of10-20minute.

　　2Selection: Choose fiberglass material container with expansion rate40%.

Control: The control of the activated carbon filter adopts a manual controller, as the activated carbon filter adsorbs a large amount of suspended particles during operation Impurities must be flushed and backwashed daily to ensure the normal operation of the system. The flushing process is determined by the cleaning time15-30minute.

5、 Fully automatic water softener or dosing device

Function: Remove hardness from water(Ca2+TheMg2+)The process is called softening. This equipment is loaded001×7Strong acid typeNaIon exchange resin replaces calcium and magnesium ions in raw water with sodium ions to reduce the residual hardness in the raw water0.03mmol/LThe purpose of softening is to prevent scaling on the surface of the reverse osmosis membrane, in order to extend its service life and treatment efficiency.

Selection: The water softener is a container made of fiberglass material

Control: The control system adopts the American automatic control valve type. According to the set time/Flow rate, control valve head can automatically regenerate resin, complete salt absorption backwash, and positive flushing water injection process. The water softener is equipped with a regeneration tank, and the salt and water levels in the salt tank should be checked daily, and salt should be replenished in a timely manner(Prohibit the use of iodized salts and other salts with additives).

6、 Precision filter

Function: Precision filtration, also known as security filter. It is a treatment process for raw water before entering the reverse osmosis membrane device.PPThe filter element has the characteristics of high filtration flow rate, large pollutant capacity, and low pressure loss. It can block impurities of different particle sizes and integrate surface filtration and deep filtration. Precision filters also experience clogging after a certain period of use, therefore, after a certain period of timePPThe melt blown filter element must be replaced, based on the pressure difference before and after precision filtration0.05-0.1MpaReplace it when necessary.

Selection: Choose stainless steel container material.

7、 High pressure pump

Function: The high-pressure pump provides the working pressure for the required water production flow rate and water quality of the reverse osmosis system. Make the filtered water pass through the pump body and reach to10A pressure of about kilograms is required to meet the inlet pressure of the membrane and ensure the output of pure water.

Selection: According to the required working pressure of the reverse osmosis membrane, a Grundfos vertical multi-stage high-pressure pump is used.

Control: When the pointer of the raw water pressure gauge reaches2KGWhen the water production switch is pressed, the high-pressure pump starts to produce water. A pressure protection switch is installed in front of the high-pressure pump, When the inlet pressure is lower than1KGWhen the pressure protection switch is turned off, the high-pressure pump stops working.

8、 Reverse osmosis device(Water purifier)

Function: The reverse osmosis device is the main part of the purified water production line. This device uses energy-saving composite filmESPAType reverse osmosis membrane element.ESPAThe series is a high desalination rate desalination membrane for brackish water. High water flux can be achieved at lower operating pressures, with an average desalination rate99.5%Due toESPAMembrane has the above advantages, providing a wider range of space for the selection of supporting equipment such as water pumps, pressure vessels, pipelines, valves, etc. And using a motor with lower power can meet the needs of work. Meanwhile,ESPAThe characteristics of high water flux and high desalination rate of membranes greatly reduce equipment manufacturing costs and system equipment investment costs, and can save a lot of energy, reduce system operating costs, and improve water quality.

Selection: The water temperature designed for the reverse osmosis device25℃, the utilization rate of water is70%.

9、 Fine filtering processor

Function: Selection1MmPolypropylene material filter element can effectively trap extremely small particles and kill bacterial corpses inside the pipeline. It has a long lifespan, high flow rate, and high filtration accuracy, ensuring sterile water supply for the production line. After a certain period of use, if the water production of the fine filtration processor decreases due to pollution blockage, the filter element must be replaced. The replacement basis is that the pressure difference before and after filtration is0.05-0.1MpaReplace it when necessary.

10、 Testing instruments and meters

　　1The reverse osmosis host is equipped with a pre membrane pressure gauge and a post membrane pressure gauge to detect the working pressure of the membrane, and is also equipped with a system path operation display. The fresh water flow meter and concentrated water flow meter detect the flow rate of concentrated and fresh water.

　　2The reverse osmosis host is also equipped with a conductivity meter and a resistivity meter. Online detection of freshwater quality is both intuitive and convenient, allowing for real-time observation of changes in product water quality.

　　3Pre processing is equipped with pressure gauges, which can observe the operation status of the equipment at any time and analyze the operation status of the equipment.

11、 Water tank(原水箱)

Function: Reserve reverse osmosis product water and provide stable water supply for the next level system operation. Control: The water tank is equipped with high and low liquid level switches Turn off and control the high-pressure pump and booster pump. When the balance water tank is at a low water level, the booster pump automatically starts to produce water. When the water tank is at a high water level, the high-pressure pump stops working.

12、 Boosting pump

Function: Provide necessary working pressure for the later stage mixed bed.

Control: Use a regulating valve after the pump to adjust the pressure and inlet water volume(manual operation).

13、 Purified water tank(finished water tank)

Function: The mixed bed effluent enters the purified water tank and is then sent to various water consumption points through the purified water tank.

Control: The purified water tank is equipped with high and low level switches to control the water supply pump of the mixed bed. When the purified water tank is at a low water level, the mixed bed feedwater pump starts working Fill the purified water tank with water;When the water level is high, the mixed bed feedwater pump stops working.

Pharmaceutical reverse osmosis pure water equipmentROMembrane drug cleaning method

AWhen is it necessary to perform medication cleaning? After using this machine for a period of time, substances such as hardness ions, bacteria, organic colloids, etc. in the water may affect itROThe pollution on the membrane surface, coupled withROThe unique concentration polarization phenomenon of the membrane itself will causeROMembrane surface fouling causes a decrease in water volume or a desalination rate below the rated value. When it cannot be restored solely by daily physical flushing methodsROWhen the normal working performance of the membrane is achieved, it is necessary toROPerform chemical cleaning on the membrane.

BDrug cleaning method:

　　1Prepare a plastic clean container and use it2Connect the two hoses to the inlet of the booster pump and the outlet of the main engine, and place the other end of the hose in the container.

　　2Put it in the container50LPure water, pour in1packageROMembrane cleaning agent, stir thoroughly and evenly.

　　3TheRORinse the switch and turn it to the manual position.

　　4Turn the raw water switch to the manual position, and the host will automatically start to clean the primary membrane with medication,1Turn off the power after hours.

　　5After stopping the use of the reverse osmosis host, restore the pipeline to its normal working state.

　　6Yes, yesROThe membrane system operates separately30Rinse in minutes.