How to choose the entrusted disposal and recycling of waste solvent? Answer: Grasp two variables-the amount of waste solvent and the purity of ingredients. Small amount, mixed composition, low recovery value, entrusted disposal worry-free compliance, overall more cost-effective; large amount, relatively single composition, there is a way to reuse, the full cycle cost of recycling is usually lower than the year-on-year increase in the disposal fee, but also offset the purchase of new solvents. The decision-making does not only look at the single-year account, the entrusted disposal fee is higher year by year is the trend, and the cost of the recovery device is mainly in the first few years, the two roads of the account should be spread out according to more than five years. This paper puts out the composition and decision-making steps of the two accounts.
Commissioned disposal is a "pay-per-ton" model: the unit price of disposal is multiplied by the annual production, plus packaging, transshipment and ledger management costs. Its advantages are worry-free-no space, no personnel, compliance risks undertaken by the disposal party; The pain point is that the unit price increases year by year, and the larger the production volume, the more you pay, and the account is not capped. The disposal fee is also affected by the composition, the unit price of halogen-containing waste liquid is significantly higher, and the mixing station spends a lot more money in this regard. In addition, transshipment batches and storage retention time also account for management energy, and large enterprises have to organize many trips a year.
Self-built recovery is the mode of "equipment input plus operation and maintenance": one-time input device, electricity, consumables and maintenance expenses during the operation period, the output is reusable solvent, according to the discount of new solvent procurement revenue. There is an extra line of income on the accounts, which is the essential difference between it and entrusted disposal. The price is to manage the equipment: someone should be responsible for the operation, consumables, testing and ledger, and there are also requirements for the site and safety configuration. Membrane separation, condensation and distillation are selected according to the requirements of composition and purity. The recovery process of the system with single composition is the simplest, the occupied area and investment of the device are also the smallest, and the solvent system with high reuse value returns to the cost faster.
The comparison caliber is unified to "annual net expenditure": entrusted disposal is equal to disposal fee plus management cost. For enterprises with large production volume, the first two years of the recovery route may be equated with the entrustment, and the difference will be opened from the third year. If the production volume is small, the depreciation of the equipment cannot be amortized, and the entrustment is more reasonable. Enterprises in the middle zone are determined by the complexity of the composition: single component is preferred for recovery, the composition is mixed and fluctuating, the adaptation cost of the recovery device is high, and the investment is cautious. When settling accounts, the exchange rate, labor and disposal unit price increases should be estimated according to the realistic caliber, do not use the happy value to beautify the recovery route.
| Account Items | Entrusted disposal | Recycling |
|---|---|---|
| Annual expenditure | Disposal fees rise year by year | Electricity Consumables Maintenance |
| One-time input | basically no | Amortization of plant investment |
| Output credit | None | Discount against new solvent purchase |
| Site Personnel | Not occupied | Requires configuration and training |
| Compliance Responsibility | Disposal party to undertake | Self-managed account |
| Long-term trend | Upward Cost | The larger the scale, the more cost-effective |
Purity and impurities shall be tested by batch before reuse, and only when the process diameter is reached can they be rematched. Only when the detection is done well can the recovered solvent be stably used in production.
Yes, but the process is longer: first analyze the components, the separation difficulty of systems with mutual solubility close to boiling point increases, and the recovery value should be recalculated; After the components are clear, the condensation, membrane or rectification route will be determined.
Yes, and it is a common practice: the mainstream waste liquid with single composition and large quantity is self-built and recycled, and the sporadic waste liquid with mixed composition and small quantity is entrusted for disposal, and the benefits of both ends are obtained.
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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