A set of solvent recovery device has been used for seven or eight years, and the recovery rate has declined, energy consumption has risen, and spare parts have become more and more difficult to buy. Is it a new one or a transformation? Many enterprises are stuck on this issue. The upgrade service is to provide the basis for this decision: first evaluate how much is left in the state of the device and which parts are worth keeping; After the transformation, the transformation route will be determined according to the evaluation results. The performance will be brought back to a reasonable range with a fraction of the investment of the new device. Decision-making and orderly implementation are the two main lines of this service.
The accuracy of the accounts for the renovation depends on whether the assessment is done in detail. The evaluation covers four parts: body state-corrosion, scaling and remaining life judgment of heat exchange surface, compressor, container and pipeline; Control system-aging degree and upgrade space of instruments, valves and control logic; Performance gap-the gap between recovery rate, energy consumption and emission and current requirements is quantified item by item; Economy-input-output comparison of three roads: continuing operation, renovation and renewal. The evaluation conclusion is written into a list: the reserved items, the replacement items and the new items have their own clear basis. The renovation plan will be extended from this list, and the budget and construction period will be settled.
The common transformation routes are divided into several categories according to the objectives: performance recovery type, replacement of heat exchange core, repair of seal, calibration of instruments, pulling the device back to the design level with small investment; Capacity improvement type, on the basis of performance recovery, expand the heat exchange surface, increase the cooling capacity, adapt to the load growth; Technical upgrading, installation of automatic control, online monitoring and data remote transmission, so that the old device can keep up with the new requirements; Compliance reinforcement type, make up the control section and monitoring facilities according to the current emission requirements. Several types of routes can be combined, according to the evaluation conclusion and budget combination, first do the project with fast return, step-by-step implementation.
The difficulty of the renovation project is that it does not affect production. The shutdown window is aligned with the production plan, and the renovation workload is arranged in reverse according to the window: the prefabrication factory is done first, and only cutting, docking and debugging are done on site; Temporary discharge paths during renovation are reported in advance for arrangement; The upgrade of the control system adopts the mode of parallel switching between the old and the new, and the old system is kept until the new system runs stably and then exits. After the renovation is completed, the performance appraisal will be conducted. The appraisal index will correspond to the gap target in the appraisal report-how much difference before the renovation, how much will be made up after the renovation, and the acceptance will be made in black and white.
| Service Item | Content | Output |
|---|---|---|
| Ontology evaluation | Corrosion scaling remaining life | RESERVATING REPLACEMENT LIST |
| Control Assessment | Instrument valve logic aging | Delineation of upgrade scope |
| Performance Accounting | recovery rate energy consumption emission gap | Gap quantification objectives |
| economic comparison | three-way input-output | Basis for decision-making |
| Implementation arrangements | Window inverted prefabrication first | Minimal production impact |
| Acceptance assessment | Correspondence gap target | Delivery in black and white |
Look at the body state: the pressure vessel and the main structure are in good condition, and the transformation value is great; If the corrosion is serious and the pressure-bearing parts are close to the end of their life, the transformation investment is not cost-effective. The evaluation report will calculate this account clearly, and the data will be determined whether to transform or replace it.
Temporary route shall be arranged in the renovation plan: short-term discharge shall be carried out according to the reporting, and temporary treatment facilities or peak shifting arrangement shall be considered for projects with long construction period. This item will have to be decided at the program stage, and we can't find a way to start work.
Not necessarily. Instruments and actuators in good condition can be retained, only upgrade the controller and monitoring layer. Upgrade using parallel switching, the old system bottom, switching risk control.
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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