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影响净化车间设计的两大因素

返回列表 来源: 发布日期: 2019.11.23

影响净化车间设计的两大因素

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温度、湿度和清洁度系数:

温度、湿度和清洁度是为工业产品量身定制的车间环境标准数据。是净化车间的最高设计依据,是产品合格率和稳定性的重要保证。现行标准分为国家标准、地方标准、行业标准和企业内部标准。例如,医药行业的清洁度分级标准和GMP标准是国家标准。对于大多数制造业来说,各生产过程的净化车间标准主要是根据各自的产品特点来确定的。例如,印刷电路板行业的曝光区、干膜区和电阻焊区的温度和湿度分别为22±1℃和55±5%,清洁度在1000-100000之间;锂电池行业更注重低湿度控制,一般相对湿度在20%以下,一些相当严格的液体注射车间需要控制在1%左右的相对湿度。

净化车间环境数据标准的确定是影响项目投资的最重要的中心点。清洁度的高低影响装修成本:设置在10万及以上,需要必要的清洁板围挡、门窗净化、人员及货物的空气淋浴传输设施,甚至昂贵的高价地板;同时,同时也影响了空调成本:洁净度越高,全净化所需的空调换气次数越大,净化风柜的风量越大,所需的空气和水的管数和末端高效风口的数量也随之增加。同样,车间温湿度的设置不仅存在上述成本问题,而且还有控制精度因素。精度越高,配套设备越齐全。如果相对湿度范围精确到±3%,±5%,则设计的加湿设备和除湿设备应完整。
车间温度、湿度和清洁度的设置不仅影响初投资,而且对一个历史悠久的工厂的运行成本起着重要的作用。因此,根据自身生产产品的特点,结合国家标准、行业标准和企业内部标准,合理制定符合自身需要的环境数据标准,是最基本、最根本的一步。
三。其他影响因素:
除空间和环境要求外,净化车间的一些影响标准的因素往往被设计者或建设者忽视,导致温度和湿度过高。比如不综合考虑外部气候,不考虑设备排气量,不考虑设备发热,不考虑设备产尘,不考虑大量人员同时工作等。
综上所述,1万级和10万级的差距有多大?在提出这个问题之前,最合理的办法是明确净化车间生产设备的参数(长、宽、高、排风量、产热量、产尘量),制定车间面积、层高、温度、湿度、清洁度等要求,以满足自身需要,然后提交设计方设计合理的综合净化方案。作为筹建方,它不仅充分了解自己的需求,而且按照这一原则,对整个项目的设计、采购、施工、验收、试生产等进行质量、成本和进度控制,这是恰到好处的。

Temperature, humidity and cleanliness factors:

Temperature, humidity and cleanliness are the workshop environment standard data tailored for industrial products. They are the highest design basis of purification workshop and the important guarantee of product qualification rate and stability. The current standards are divided into national standards, local standards, industry standards and enterprise internal standards. For example, the cleanliness level classification standard and GMP standard of pharmaceutical industry are national standards. For most manufacturing industries, the standards of purification workshop of each production process are mainly determined according to their own product characteristics. For example, the temperature and humidity of exposure, dry film and resistance welding areas in PCB industry are 22 ± 1 ℃ and 55 ± 5%, and the cleanliness ranges from 1000 to 100000; the lithium battery industry pays more attention to low humidity control, generally the relative humidity is below 20%, and some fairly strict liquid injection workshops need to be controlled at about 1% relative humidity.
Defining the environmental data standard of the purification workshop is the most important center point affecting the project investment. The establishment of cleanliness level affects the decoration cost: it is set at the level of 100000 or above, which requires necessary clean board enclosure, purification of doors and windows, personnel and goods air shower transmission facilities, and even expensive high price floor; at the same time, it also affects the air conditioning cost: the higher the cleanliness is, the greater the air exchange frequency of the air conditioner necessary for full purification is, the greater the air volume of the purification air cabinet is, and the air and water are needed The amount of tube and end high-efficiency tuyere also increases. Similarly, the establishment of temperature and humidity in the workshop not only has the above-mentioned cost problems, but also has the control accuracy factor. The higher the accuracy, the more complete the necessary supporting equipment. If the relative humidity range is accurate to ± 3%, ± 5%, the humidification equipment and dehumidification equipment to be designed shall be complete.
The establishment of workshop temperature, humidity and cleanliness not only affects the initial investment, but also plays an important role in the operation cost of a plant with a long history. Therefore, according to the characteristics of its own production products, in combination with national standards, industry standards and internal standards of the enterprise, it is the most basic and fundamental step to reasonably establish environmental data standards that meet its own needs.
3. Other influencing factors:
In addition to the space and environment requirements, some factors affecting the standard of purification workshop are often ignored by the designer or the builder, resulting in excessive temperature and humidity. For example, the external climate is not considered comprehensively, the exhaust volume of the equipment is not considered, the heat generation of the equipment is not considered, the dust production of the equipment is not considered, a large number of personnel working at the same time is not considered, and so on.
To sum up, how much is the difference between level 10000 and level 100000? Before asking this question, the most reasonable way is to make clear the parameters of the production equipment in the purification workshop (length, width, height, exhaust volume, heat output and dust production), formulate the workshop area, floor height, temperature, humidity and cleanliness requirements to meet their own needs, and then submit to the designer to design a reasonable comprehensive purification scheme. As the preparation party, it not only fully understands its own needs, but also runs through the quality, cost and schedule control of the design, procurement, construction, acceptance and trial production of the whole project based on this principle, which is just right.

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