Winter anti-freezing

Could you be more detailed? I don’t quite understand what you mean

The second floor means using electricity to insulate the pipes. The main freeze protection points in winter are the circulating water system, the steam condensate system, and the demineralized water system. If these systems have dead zones where water does not flow, and if the insulation is inadequate, freezing can occur, damaging pipes and valves. The common method to prevent freezing is to install discharge valves at the lowest points in these dead corners, ensuring that a small amount of water flows out; this prevents excessive material consumption. Even if some water is used up, it is still better than having the pipe valves damaged by freezing. The areas where water leaks into the system are usually the low-pressure and evaporative coolers; the pressure there is lower than that of the circulating water, leading to equipment leaks and the entry of circulating water into the system. Another issue is a leak in the evaporation heater, which allows steam to enter the medium and increase the water content in the urine.

Electric heat tracing is currently widely used in chemical plants, with good overall results.

Pipes and equipment should be properly insulated, valves should remain open to prevent stagnant water, as this can damage the valves.

There are no special anti-freezing facilities; it’s sufficient to have proper plans in place. During normal production, anti-freezing measures generally pose no major problems. The key is to ensure thorough drainage when production stops. What does \"leaking water\" mean? Don’t understand

The answer on floor 6 is correct; how could it be considered spam?

The urea plant is an old system; the key to preventing freezing in winter lies in the intensity of inspections and the level of commitment. It’s good to strengthen in this regard.

Northwestern circulating cooling water generally does not require insulation; in winter, the lowest points in the water and steam systems are drained to allow for regular drainage, which is why fertilizer plants in the north have much higher total water discharge volumes in winter compared to summer!

Key points for freeze protection in winter: When operating in winter, the main concern is preventing equipment and pipelines from expanding due to the low temperatures around them, which could lead to production disruptions and malfunctions of control devices. To address this, the following points should be taken into account: 1. Install insulation boxes for instruments in areas where it is necessary. 2. Identify the dead ends in the pipeline and take measures to prevent freezing and cracking. 3. Use insulation materials to enhance the insulation of the device. 4. Carefully monitor the operation of the equipment to prevent freezing in pipes and equipment, and take measures in areas where freezing is likely to occur. 5. Strictly prevent leaks in equipment and pipelines, as freezing is likely to occur at the leakage points, affecting the normal operation of the system. 6. In the event of a stoppage or accident, as long as the entire system has not been completely shut off and water has not been fully drained from the system, steam supply must be maintained. 7. Some pipelines without heat tracing may freeze during shutdown; therefore, all liquids and water must be drained within half an hour after shutdown, taking care to handle the discharge of toxic liquids. 8. When the surrounding air temperature is below zero degrees, the heating of the equipment and pipelines must increase by 25°C per hour once the device is started up; at this time, the temperature difference between the inlet and outlet of the equipment should not exceed 100°C. 9. When pressurizing the device during startup, the pressure must be increased gradually – 0.25 times the operating pressure can be applied in the first hour, with an additional 0.25 times the operating pressure added every 15 minutes. It is important not to increase the pressure too quickly.