Most of the problems with the solvent recovery device were not broken overnight, but accumulated by minor problems: no one found the aging of the seals, the accumulation of frost on the heat exchange surface, and the slow failure of the air valve linkage. The role of regular inspection and preventive maintenance is to deal with these problems before they become downtime failures. We make this set of services into a fixed cycle of work, inspection, maintenance, recording, advice four things according to the rhythm.
Patrol inspection is carried out in blocks according to the composition of the device: the condensation and refrigeration unit looks at the temperature of all levels, the pressure difference and the operating state of the refrigeration unit; The collection pipeline looks at the negative pressure distribution, liquid collection discharge and slope state; The fan and pump look at the current, vibration and abnormal sound. Electrical and control see linkage function, instrument indication and alarm records. Each block has a fixed checklist, item by item, not by impression.
Inspection is not only about equipment, but also about data: comparing the readings of this inspection with historical records, trend anomalies are more informative than single reading anomalies.
The frequency of patrol inspection shall be determined according to the operation intensity of the device: the period of the device with continuous operation and high load shall be shorter; The intermittent operation of the device can lengthen the cycle, but the stage of changing varieties and frequent start-up and shutdown shall be encrypted.
Preventive maintenance is arranged according to two types: one is fixed cycle, such as seal inspection and replacement, heat exchange surface cleaning, pipeline drainage, instrument calibration, according to the periodic table. Two types of combination, both to avoid excessive maintenance, but also to prevent missing early deterioration.
Records are kept for each maintenance: what was done, what was changed, and the state readings at that time. The accumulation of these records is the basis for judging the life of components and arranging spare parts.
The problems found in the inspection are classified according to the degree of urgency: on-the-spot treatment or shutdown treatment that affects the operation safety; If the recovery efficiency is affected but can withstand it in the short term, it shall be included in the recent maintenance plan and the processing time limit shall be given. If it belongs to the end of the life of the component and needs to be prepared in advance, it shall be included in the spare parts plan in advance. Each item is written into the inspection report and the closed-loop sales items are processed.
| Service Item | Content | Frequency |
|---|---|---|
| Regular inspection | Check and record readings by list in blocks | According to the operation intensity, trend comparison |
| Periodic maintenance | Seal, heat exchange surface, drain, instrument calibration | Execute by periodic table |
| Status maintenance | Trigger conditions such as differential pressure are processed when they reach the value. | unequal fixed period |
| Hazard classification | The safety items will be handled immediately, and the rest items will be sold within the deadline. | Update after each inspection |
| Spare parts plan | End-of-life parts stocked in advance | Put forward with the inspection report |
| Record Delivery | Inspection Report and Maintenance Record | Delivery after each service |
The two do not conflict. The operator is responsible for the daily duty, and the external inspection provides another pair of eyes: according to the fixed list, the inspection is divided into blocks, the trend comparison is made, and the maintenance suggestions are given, which can often find the hidden dangers that are used to in daily life.
Routine inspection is carried out in the operating state of the device without shutdown. Maintenance items involving downtime will be negotiated in advance and combined with the workshop plan as much as possible.
Records are the basis for judging the life of components and arranging spare parts, and are also evidence of the status of the device. For each abnormality in the operation of the device, the corresponding precursor can be found from the record afterwards.
This article by LuoyangWohong PetrochemicalEquipment Co., Ltd. arranges that the company provides design, manufacturing and operation and maintenance services for condensation recovery, membrane separation recovery and complete solvent recovery devices for chemical and pharmaceutical enterprises. If you need process evaluation or scheme configuration, please contact and exchange.
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