1. plate tower equipment before driving preparation
General tower equipment in the overhaul or re-drive before the following work should be done:
① carefully check whether the water, electricity, steam can guarantee normal production needs.
② various material conveying devices such as pumps, compressors and other equipment can be normal operation.
③ equipment, instrumentation, fire safety facilities are complete and complete, there are computerized automatic control devices should be tested to adjust the system.
④ All valves should be in normal operation in the open and closed state, and to ensure that there can be no leakage, escape steam running liquid phenomenon.
⑤ each condensing, cooler beforehand to test whether leakage, arrange to send water pre-cooling, the whole tower equipment to send steam first warm tower.
(6) before and after the unblocking section contact, grasp the feed concentration and storage tank tank liquid volume, notify the laboratory for sample analysis preparation work.
2. Typical plate tower equipment operating requirements
As the plate tower equipment in the chemical production of a wide range of applications, can not be described one by one its operation process, here only in the petroleum refining common normal reduced pressure distillation device
Distillation Tower as an example to introduce its operating procedures: ① check the distillation tower system valve:
① Check the distillation tower system valve off / on whether the correct. Before distillation begins, open the cooling water circulation system, and open the pressure relief valve, then open the
Condenser cooling water valve, adjust the water pressure to 0.15MPa, close the feed rotor flow meter valve.
② Turn on the distillation tower system vacuum, vacuum degree according to specific process requirements to choose, such as distillation materials volatile strong, turn on the brine unit, enable the condensing system, trapping materials.
③ Start the magnetic pump, send the distillation materials into the metering tank, and then transport to the high level tank.
④ Open the preheating steam valve, open the tower kettle steam valve and control the steam pressure within the required range and maintain the set temperature.
⑤ Check that the valves of the connecting pipes between the tower, the tower kettle and the residual tank are opened correctly.
⑥ Select a suitable inlet to the tower, turn on the rotameter and adjust the flow rate according to the specific situation.
⑦ The whole distillation process must be monitored for vacuum, steam pressure, flow, material delivery and discharge.
⑧ Distillation is completed, slagging, cleaning system.
3. Plate tower equipment parking
Usually, you have to stop regularly every year to open the tower equipment and check its internal components. Note that in the disassembly of the tower plate, each layer of the tower plate should be marked, in order to reassemble the error. In addition, spare parts, such as seals and connections, are prepared in advance for replacement or replenishment prior to the stopping inspection. Parking inspection items are as follows:
① take out the tower plate or packing, check, clean dirt or impurities.
② detect the tower wall thickness, make thinning prediction curve, evaluate the corrosion situation, judge the tower equipment life; check the tower body has no leakage phenomenon, make repair arrangements for leakage.
③ Check the wear and tear of the tower plate or packing.
④ Check the liquid level meter, pressure gauge, safety valve for blockage and operation at the specified pressure, readjust and correct if necessary.
⑤ If abnormal vibration is found during operation, identify the cause when stopping for inspection.
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