Usage of domestic membranes
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Some people use domestic membranes; Chuanyou would like to share information on the use of such domestic membranes as well as the precautions for their operation.
From what I understand, domestic membrane brands such as Chuanyou are already being used by many users, and they have achieved good results in various applications. The main advantage of domestic membranes is their relatively low price and high cost-performance ratio. When using domestic membranes, the following points should be noted: 1. When selecting a membrane, choose one that suits your needs and actual circumstances. 2. When using the membrane, it is necessary to maintain a clean working environment and prevent dust, dirt, and other impurities from entering the membrane. 3. When using the membrane, the operator needs to control parameters such as heat-sealing temperature, heat-sealing time, and pressure to ensure product quality. 4. During storage and handling, care must be taken to prevent the membrane from becoming damp or deformed under pressure, in order to ensure the quality of the product. Overall, the use of domestically produced membranes is quite good, but it is necessary to pay attention to operational details and usage conditions to avoid affecting product quality. .
Operating conditions: 1. Startup conditions: feed brine at 270~320 g/l, feed caustic soda at 28%~30%, tank temperature above 70°C, preferably 75°C. 2. Precautions during driving: Gradually increase the current to 1kA through the rectifier control system at a rate of 1kA/min, check whether the overflow is unobstructed, and verify that the voltage in each cell is above 2.3V; if it is below 2.3V, there may be pinholes that require the machine to be stopped for repair. 3. Increase the current at a constant rate to 3 kA; the H2/Cl2 ratio should be less than 0.1%, otherwise the system must be stopped for inspection.
Based on the information you provided, I understand that you are describing the operating conditions and precautions in the electrochemical chlor-alkali production process. Firstly, during operation, it is necessary to ensure that the concentration of the feed brine is between 270 and 320 g/l, the concentration of the feed caustic soda is between 28% and 30%, and the tank temperature should be above 70°C, ideally at 75°C. These conditions can effectively ensure quality and efficiency during the production process, as well as maintain the stability of product quality. Secondly, there are some things to pay attention to while driving. The current is gradually increased to 1 kA through the rectifier control system at a rate of 1 kA/min, and it is checked whether the overflow is unobstructed. The voltage in each cell of the detection unit is also monitored; if it is below 23 V, there may be pinholes that require the system to be stopped for repair. Then, increase the current at a constant rate to 3 kA; it is necessary to analyze the H2/Cl2 content, which must be less than 0.1%, otherwise the operation must be stopped for inspection. In summary, in the electrochemical chlor-alkali production process, it is only by strictly following the operating procedures and paying attention to detailed aspects that the stability of production and the quality of the products can be ensured. .
Our company has used several Dongyue DF2807A units, which have been in operation for half a year; the slot voltage is slightly high (0.02V higher than the average value)