Offset printing fountain solution self-circulation purification system and purification method

Abstract

The invention discloses an offset printing fountain solution self-circulation purification system and method. The system comprises a first water tank, a second water tank, a layered deposition filter, a filter, a third water tank and a control circuit. When through the control circuit, it is found that particle solubility of a fountain solution in the first water tank is less than a preset value, the control circuit controls a 3-way shift switch so that the fountain solution flows into a first chamber, when through the control circuit, it is found that particle solubility of the fountain solution in the first water tank is greater than the preset value, the control circuit controls the 3-way shift switch so that the fountain solution goes through the layered deposition filter, flows into the first chamber, then enters a self-circulation filter system and is subjected to cyclic purification, the control circuit receives signals of a thermometer, a pH detector and a conductivity detector, and when the pH and the conductivity are higher than a corresponding pH threshold and a conductivity threshold, alcohol and water are added into the primary fountain solution according to a certain ratio. The system and method have high fountain solution purification efficiency, realize real-time accurate detection of indexes of the fountain solution, make the fountain solution quality stable and guarantee printing quality.

Description

technical field [0001] The invention relates to a fountain solution self-circulation purification system, in particular to an offset printing fountain solution self-circulation purification system and a purification method. Background technique [0002] The effective utilization of fountain solution has always been an urgent problem to be solved in the industry. The existing technical solutions are mainly to go through primary filtration first, then fine filtration, and finally enter the fountain solution to add water tank, and carry out the detection of various indicators in the water tank According to the test results, add various buffers in the water tank, or add new fountain solution, alcohol, water and other substances. Therefore, there are some deficiencies in the prior art: during the circulation and filtration of the dampening solution, the filter medium cannot be switched at any time when it is clogged, so that it cannot be replaced without stopping the machine, whi...

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Problems solved by technology

Therefore, there are some deficiencies in the prior art: during the circulation and filtration of the dampening solution, the filter medium cannot be switched at any time when it is clogged, so that it cannot be replaced without stopping the machine, which affects the filtration efficiency, and when the filter medium is clogged, it is easy to cause the water tank to evacuate and overflow Phenomenon, damage equipment, waste resources

In addition, each indicator detection and buffer addition are in the same water tank, which will cause uneven mixing of the solution and detection errors.

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