Cleaning time

The I I cleaning procedures as a whole, compared with household laundering, are characterized by huge variations in the composition of the soils, types of surface to which they adhere, cleaning time available, etc. The optimum choice of enzyme type and dosage level normally has to be established through a cooperation between the customer (end user), manufacturer of the detergent, and enzyme producer. 

Each head section can be opened separately. This reduces the required cleaning and saves on scrap compound when changes are made. The swing-away flow channel inserts allow fast product changes. Easy access to the flow channels and extruder screw tips allow for fast removal of compound residues, so that cleaning times are shortened and waste minimized. 

Cleaning times are easily accounted for in both policies. The method of search for the shortest cycle time does not change in the case of the ZIV policy if non-zero cleaning times are considered. The slacks can also be easily calculated a priori with non-zero cleaning times. In case of the UIS policy, cleaning times must simply be added to the processing times ... 

Below, a simple algorithm for determining the slacks between every pair of batches for product i and product k with cleaning times is presented. 

Find the best schedule for the manufacture of six products A, B, C, D, E, and F (Np = 6) that are to be produced in four stages (NS = 4) in five cycles (NC = 5) each involving two batches of A, B, C, and D, and one batch of E and F, i.e. ten batches (NB, = 10). Processing times are given in Table 7.4-19. Consider cleaning times of zero, three, and five hours between subsequent products, and no cleaning if the same product is manufactured in the subsequent batch. 

Optimal schedules are given in Table 7.4-20. Clearly, for cleaning times of five hours, single-product campaigns are the best solution of the scheduling problem, while for zero cleaning times (theoretical case) mixed-product campaigns would be best. 

The variable t in the foregoing equations is the actual time (/nncr) that is required to pass a volume V of filtrate through the medium and is only part of the total time of the cycle (tcyde). The rest of the cycle, which may include wash time, disassembly and assembly time, cleaning time, etc., we shall call dead time (Aead) ... 

An injection machine can be equipped with a two-sided shuttle table using either 1 or 2 complete moulds. Applications are in production using a common top mould plate and two identical lower plates. Products with metal inserts or which require unloading and mould cleaning times as long as cure times are best suited to this process. 

The two processors are delivering the product via pipes into one of several tanks in a tank farm. Each tank has parameters such as capacity or cleaning time. From the tanks the product is either delivered to processes on site (captive use) or to customers based on given customer orders. Additionally, it may be stored in two external buffers. In that case there are transportation moves from the tank farm to one of the external buffers (in case of over-production) or from the external buffer to the tank farm (in case of shortages in production) induced. 

At batch sizes of 100 kg the standard multipurpose plant becomes superior to the pipeless plant with respect to the processing time. The reason for this is that the CIP times of the stations and the transfer times of the vessels remain constant in both cases and therefore the portion of the duration of the productive operations becomes smaller in comparison to the processing time. The advantage of the production of several batches in parallel is therefore reduced by the increasing portion of the cleaning times of the stations. 

Each filter has demonstrated the capacity to filter the full brine flow of 195 m3 h 1. The pressure drop through the filter medium is measured and monitored continuously. Typically, it is nearly constant over a 2-h filtration at 195 m3 h 1. Back-pulse cleaning restores the initial pressure drop from cycle to cycle, with only a slow increase over time. After 12 months running time, the initial pressure drop at the beginning of the filter cycle had increased by 0.6 bar. The filter membranes were chemically cleaned with 5 % hydrochloric acid. After a cleaning time of 2 h the filter was started again and the pressure drop was less than 0.1 bar greater than that of new filter socks. 

At very low moisture, however, fiber damage is significant. An Increase of 30 percent in fiber shorter than 12.5 mm was observed when lint moisture was 3.0 percent rather than 5.7 percent at cleaning time. 

CLEANING Type of reagent Surface composition Cleaning time Temperature Equipment condition... 

Silica fume when used in conjunction with superplasticizers plays an important role in improving the cohesion of the shotcrete mix, allowing for the build-up of the sprayed concrete on vertical surfaces, within a short period, without sloughing off. In addition the combination of these admixtures has provided ease of pumping, better compaction and greatly reduced the rebound, thus minimizing waste and cleaning time. Typical mixture proportions and properties for wet-mix superplasticized shotcrete are presented in references 69 and 72. 

Verification of log book record check the log book and verify the cleaning time and date and product details. Cleaning procedure and date and time are to be verified from log book. 

They may be applied by hand (hot plate), semiautomatically, or automatically. The machines involve far less cleaning time and generally get less gummed up. ... 

Earnings Before Interest and Tax (EBIT) /I Increase efficiency Reduce all kinds of waste of resources / Increase capacity utilization Reduction in specific manufacturing costs Increased yield Raw material costs/COGS / Reduction of overtime (or changeover costs) Cleaning time/batch (or product)... 

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