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Dosing Device
Using a time program control, the automatic dosing cycle, dosing amount, dosing time, and dosing frequency are first set according to the system's operational needs. During the subsequent system operation, when the dosing cycle arrives, the metering pump automatically starts dosing and stops at the specified time; during the sewage discharge cycle, the metering pump stops dosing, and after the specified time, the metering pump resumes to replenish the chemicals lost due to sewage discharge, maintaining the chemical concentration in the system at a normal level. The metering pump stops again at the specified time.
Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.
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Dosing device
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Dosing Device
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1) Fully Automatic Dosing Equipment
Using time program control, first set the automatic dosing cycle, dosing amount, dosing time, and dosing frequency according to the system's operational needs. During subsequent system operation, when the dosing cycle arrives, the metering pump automatically starts dosing and stops at the specified time; during the sewage discharge cycle, the metering pump stops dosing, and after the specified time, the metering pump restarts to replenish the lost chemicals due to sewage discharge, maintaining the system's chemical concentration at a normal level, and stops at the specified time.
2) Intelligent Dosing Equipment
Intelligent dosing equipment uses sensor signals to control the operation of the dosing pump. This control method requires monitoring instruments such as pH meters, conductivity meters, and corresponding sensors. First, set the limit values of control parameters (pH or conductivity) according to the system's operational needs. If the system encounters the following conditions during operation, the dosing device will start working: if the pH value is lower or higher than the set value. A low pH indicates strong acidity and a tendency for system corrosion; a high pH indicates strong alkalinity and a tendency for scaling. The detection instrument will feedback this signal to the control system, which then sends a command to the designated metering pump to start dosing to adjust the pH value. Once the pH returns to normal, the metering pump stops. If conductivity exceeds the set value, it indicates excessive salt content in the system, leading to corrosion and scaling tendencies. The monitoring instrument will feedback this signal to the control system, which then commands the sewage solenoid valve to open for drainage. After conductivity returns to normal, the solenoid valve closes. Then the metering pump starts dosing to replenish the chemicals lost due to sewage discharge, maintaining the system's chemical concentration at a normal level, and stops at the specified time.
Mainly composed of a metering tank (chemical storage tank), metering pump (dosing pump), automatic control system, connecting pipelines, etc. Except for some dosing pipelines, sampling pipelines, and dosing concentration detection instruments, these devices are generally installed together in a dosing room. The automatic dosing device integrates the metering tank, metering pump, and automatic control system, all installed on a single base.
Technical Parameters
Applicable system pressure: 0.2-1.0MPa
Power supply: 220V/50Hz
Operating environment: Temperature 5–45℃, Humidity ≤85%
Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.
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International Trade Department:+8613210553256
Address: Room 1512-1, Building 7, Rongsheng Times International Plaza, No. 9 Beiyuan Street, Licheng District, Jinan City, Shandong Province
