1. The problem of positive pressure and negative pressure: The method of introduction is negative pressure, that is, the fan device is at the front end, and the internal pressure of the processor is negative pressure related to the atmosphere. The negative pressure method has several advantages. For example, the airflow is stable, there is no air leakage, and the effect is related to positive pressure. Positive pressure only needs to be used under special circumstances, such as device specificity, site constraints, etc. 2. It is necessary to connect the soft connection and the fan through soft connection, and first consider the oscillation problem. 3, the root of the fan and the bottom of the processor are only required to ensure the wind resistance. No special requirements. The bottom of the fan is necessary to meet the device standards. Pay special attention to resonance. 4, wind resistance problems Because the planning of the first choice of low-speed pipeline, so do not consider excessive wind resistance. However, the pressure of 50 Pa is increased for each turn, so the pipe should be as straight as possible. 5, Filtering the role of the problem filter is very important for the project and it is necessary to pay attention to it. In particular, the wind resistance of the filter should be measured at the site. Excessive wind resistance can cause a lack of ventilation. The measurement method uses a multi-point calculation method. See other technical information for details. 6, It is difficult for the flow field to determine the flow field in real time. Because the dynamic pressure in the large section is very low, do not attempt to measure the flow rate. The use of cigarette smoke to measure the flow field is also wrong, because cigarette smoke is a hot fluid and spreads quickly due to the force of the molecules. The method that can be applied practically is to infer the flow field through suction, and although it is extremely rough, it is the only way to do it now. For example, a tracer gas or the like can be emitted. 7. The sealing problem is related to other projects because the pressure is so low that the sealing problem does not require special attention. 8. The planning of Tianyuan and variable cross-section should prevent the production of on-site circular pipes and variable cross-section connecting pipes. However, when the site conditions change, the Tianyuan and variable cross sections can be used for correction. In addition, the soft link can also supply Error correction, though small. Outdoor unit points: Prevent direct sunlight and rain, although it is very simple, but it is very important. Lack of this equipment may cause our equipment to fail to meet the planning requirements in terms of performance and life. Please pay attention. 9, the selection of ventilation ducts on low-speed pipelines, regardless of the iron pipe, color steel pipe, PVC polymer plastic pipe, glass steel pipe. The above are all optional pipeline data. There is no difference in performance between the two. There is only a difference in price and equipment. The so-called low speed refers to less than 15 meters per second speed. However, if the planned wind speed is too high, there are significant differences. Generally selected materials with small friction coefficient, such as PVC polymer plastic pipes. 10, The air inlet is concerned with the selection of the cone inlet and the flat inlet. Under normal circumstances, the flat inlet can be selected. Generally, the conical inlet can control the flow field is very small. Only need to play a better role in a single situation. In general, the number of air inlets is more reliable than that of one air inlet, but one air inlet should be simplified in terms of devices. Under normal circumstances, it is selected single inlet. Of course, when multiple sets of equipment are used together, one more air intake for each set is selected. Multiple sets of equipment share one air inlet, and the demand is especially planned, and it often fails to function well. 11. The number of exhaust outlets in the exhaust outlets and the exhaust in the upper floors are selected as one discharge outlet. Otherwise, each device has a single exhaust outlet. Some fans are sometimes straightforward. 12, high-altitude exhaust In most cases, high-altitude exhaust is useful and appropriate, both in line with standard standards also meet the occupational routine. However, the excessive exhaust height demand for civil works and other cooperation may also not allow on-site conditions. Therefore, unless it is a standard decree, otherwise it will not be rigidly adhered to high-altitude emissions, and it can be sensitively planned according to site conditions. For example, if you use an existing building to build a very low exhaust pipe, the investment will be small. 13, a very important part of the wind cap and elbow is fundamentally necessary. Can not be saved.
Benzoyl peroxide, also known as Dibenzoyl peroxide, commonly known as Initiator BPO,It is a strong oxidant, used as a monomer polymerization initiator for polyvinyl chloride, unsaturated polyesters, polyacrylates, etc., as a crosslinking agent for polyethylene, and as a rubber vulcanizing agent.
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Benzoyl peroxide is an oxidizer, which is principally used as in the production of polymers.
As a bleach, it has been used as a medication and a water disinfectant.In specialized contexts, the name may be abbreviated as BPO.
As a medication, benzoyl peroxide is mostly used to treat acne, either alone or in combination with other treatments.Some versions are sold mixed with antibiotics such as clindamycin. t is also used in dentistry for teeth whitening.
Benzoyl peroxide is also used in the plastics industry and for bleaching flour, hair, and textiles.It is also used to remove stubborn stains from dolls and other plastic toys, although some users have claimed that the product has unwanted long-term effects of discolouring the item.
January 28, 2024