1.1 High Temperature Alkali Solution Technical Parameter Table

1.1.1 Alkali solution flow rate: 100-150m³/h;

1.1.2 Alkali solution properties: 5% concentration sodium hydroxide solution;

1.1.3 Design temperature: 50-95℃;

1.1.4 Impurity components: suspended fluffy label paper, glass bottle slag;

1.2 Offline Intelligent Filter Unit Selection

1.2.1 Water outlet and inlet diameter: DN125 [PN10] Execution standard: HG/T20592-2009

1.2.2 Main equipment material: Q235B

1.2.3 Equipment design temperature: 95℃

1.2.4 Equipment filter element material: SS304

1.2.5 Equipment filter element precision: 200um (80 mesh)

1.2.6 Equipment filter element structure: woven sintered filter mesh

1.2.7 Number of equipment filter elements: 4

1.2 Offline Intelligent Filter Unit Design Structure

Design structure: Stainless steel filter elements use a bottom-fixed structure, consisting of one angle-type actuator structure and four motors forming four filter mesh chambers. During filtration, three of the four chambers are in filtration state, with one chamber always reserved as a standby filter element; during backwash, the filter meshes in the four chambers are backwashed sequentially. Each chamber has two backwash processes: one uses a stainless steel brush mechanical device to brush off impurities attached to the inner wall of the filter mesh and discharge them through the sewage outlet; the other uses a high-pressure nozzle to perform 0.8Mpa high-pressure water backwash on the outside of the filter mesh without dead angles.

Combined working principle:

① The filter unit uses a horizontal tangential inlet to flow into the filter tank. Centrifugal force causes glass bottle slag, which is heavier than water, to swirl into the conical body and settle, preventing it from entering the filter mesh;

② Suspended flocculent alkali solution swirls upward through the stainless steel filter mesh, intercepting impurities on the inner wall of the filter mesh, and clean liquid flows out from the outlet; as impurities accumulate inside the filter mesh, a pressure difference forms between the inlet and outlet. When the pressure difference reaches the preset value, the intelligent actuator rotates 90° clockwise to the designated position, opening the sewage valve (DN65). The electric motor and high-pressure backwash pump start to backflush the inner and outer walls of the sintered filter mesh in one chamber (90°). Each chamber's backwash cycle time can be set (within 10-60 seconds). This process repeats sequentially three times (180°, 270°, 360° returning to 0°).

1.3 Offline Intelligent Filter Unit Program Settings

1.3.1 Online process settings (manual/automatic selection/automatic mode):

Manual/automatic selection: When manual operation is needed, set the gear to manual. The intelligent actuator, electric motor, online sewage valve, and offline drainage valve can all be started and stopped.

In automatic mode: Pressure difference setting: A pressure transmitter is installed at the filter inlet and outlet to set the filter pressure difference value;

Time setting: The control box has a time setting device to set the backwash cycle time according to user requirements; pressure difference and time settings coexist for automatic backwash, with pressure difference setting having priority.

1.3.2 Offline process settings (manual mode):

Manual: When the filter unit is offline, it must be set to manual mode; set the gear to manual. The intelligent actuator, electric motor, online sewage valve, and offline drainage valve can all be started and stopped. Open the offline drainage valve and the sewage valve simultaneously, start the motor and high-pressure backwash pump, and brush off impurities attached inside the filter mesh, discharging all to the sewage pipeline. Wait for the next alkali solution switch from line A bottle washer to line B bottle washer.

1.3.3 Adjustment of pressure transmitter parameters at inlet and outlet, factory preset value 50KPa (specific preset value adjusted via PLC system panel provided by our company)

1.4 Offline Intelligent Filter Unit Supply List

1.5 Total Installed Power of Offline Intelligent Filtration Unit

1. Impact of Equipment Operation on Bottle Washing Machine

The design and development of the offline intelligent filtration unit is currently a newly developed filtration device by our company, combining the advantages of various water treatment equipment, including cyclone separators, brush filters, multi-column backwash filters, high-pressure backwash filters, and other functional combinations.

Main issues addressed: 1. Reduce heat loss of alkali solution during the alkali recovery process.

2. Enables online cleaning and offline brushing without disassembling the equipment, improving production efficiency.

3. The overall equipment uses less water during operation, has a high degree of intelligence, and reduces labor costs.

 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.