After the device has been used for several years, it is often difficult for the original recovery device to meet the situation that the original capacity is not enough or does not match the new working conditions: the output is increased, the solvent type is changed, and the emission requirements are increased. At this time, whether to build a new one or transform it on the original basis needs to be clear about the current situation before it is decided. LuoyangWohong PetrochemicalThe equipment provides supporting services for the technical transformation and expansion of the solvent recovery unit, forming a complete path from the status quo verification to the implementation of the scheme.
There are several types of common situations. First, after the output is increased, the exhaust volume is obviously increased, the device cannot handle it, and the recovery rate is decreased. Second, the product structure is adjusted, the exhaust gas composition is changed, and the original temperature level is inappropriate. Third, the emission or reuse requirements are increased, and the original device configuration cannot be reached. Fourth, the equipment is aging, the heat exchange surface is fouled, and the refrigeration capacity is attenuated. It is difficult to restore to the design level by maintenance.
These types of situations correspond to different treatments. The first two categories can be solved through parameter adjustment or local modification, the third category usually needs to add a check at the end, and the fourth category is more involved in expansion.
The renovation is more "symptomatic" than the new construction, and the plan will not go astray if the verification is done carefully. The verification focuses on the actual capability boundaries of existing installations, not just nameplate parameters.
| Verification Items | Problems to be clarified | The significance of the transformation |
|---|---|---|
| Actual exhaust condition | The true range of gas volume, concentration, temperature and humidity | Determine post-retrofit treatment capacity targets |
| Existing capacity | Heat exchange area, cooling capacity, allowance of fan and pump | Determine which paragraph is the real bottleneck |
| Structure and Site | Main structure, foundation, pipeline and site allowance | Decide if you can retrofit in situ |
| operation log | Recycling trend and historical failure | Find out the reason for the ability to decay |
| Reuse Requirements | Requirements for purity and water content of recovered liquid | Decide whether the rear paragraph needs to be supplemented |
| Emission requirements | Current concentration and total control requirements | Decide whether it is necessary to add a check section at the end. |
According to the verification conclusion, the transformation direction is roughly divided into four types: adjusting parameters and operation mode; Adding a level of treatment in the middle of the existing process; Replacing or adding a certain section of equipment; Overall expansion or building another set. The first two types of inputs are small, quick, and suitable for situations where the deviation of capacity and working conditions is not large; the latter two types of inputs are large and suitable for occasions where the deviation is obvious.
The core of the trade-off is "how much usable value is left in the existing equipment". If the main structure, foundation and site are still usable, the renovation is usually more time-saving and investment-saving than the new construction. If the original design deviates too much and the site is limited, the new construction will be clearer.
The service includes status verification, scheme design, equipment manufacturing, on-site construction and commissioning review, which can be entrusted in stages according to the needs of the enterprise. What the enterprise needs to cooperate with is to provide operation records and process data, arrange personnel to accompany the verification, and arrange the construction window according to the agreement.
Depending on the scope of the transformation. Most of the parameter adjustment and segmental supplement can be completed in the maintenance window. If the main equipment is involved in the replacement, a certain shutdown time needs to be arranged, and the implementation window will be considered in the scheme stage.
It mainly depends on how much usable value is left in the existing equipment. If the main structure, foundation and site can be used, the transformation is usually more economical; if the original design deviation is large and the site is limited, the new construction may be clearer. The verification phase will compare the inputs and cycles of the two routes.
In the scheme stage, the transformation target and configuration will be determined according to the verified working conditions, and in the debugging stage, the target will be verified item by item. The actual effect is related to operation management and working condition stability, so debugging and operation record are equally important.
This article is organized by Luoyang wohong petrochemical equipment co., ltd. the company provides design, manufacturing and operation and maintenance services for condensation recovery, membrane separation recovery and complete solvent recovery units for chemical and pharmaceutical enterprises. if you need process evaluation or scheme configuration, please contact and exchange.
Mr. Li 13526990215
Hotline
