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  • 净化工程设计和施工七大关键问题?
    来源: 浏览: 发布日期:2020-04-13
    Seven key issues of purification engineering design and construction:
    韦德国际1946手机版设计与施工的七个关键问题:
    1. Air duct requires both economy and efficiency
    一。风道既经济又
    In the centralized or purified air conditioning system, the requirement of air duct is to supply air economically and effectively. The former requires low price, convenient construction, low operation cost and small resistance to internal surface smoothness. The latter refers to good tightness, no air leakage, no dust generation, no dust accumulation, no pollution, fire resistance, corrosion resistance and moisture resistance.
    在集中或净化空调系统中,风管的要求是经济有效的送风。前者要求价格低廉,施工方便,运行成本低,对内表面平整度阻力小。后者是指密封性好、无漏气、无粉尘产生、无粉尘堆积、无污染、耐火、耐腐蚀、防潮。
    韦德国际1946手机版
    In operation, sometimes the local resistance of pipe fittings is much higher than the resistance along the air duct, which needs to be improved. Pipe fittings mainly include elbow, reducer tee and four-way pipe. The radius of curvature at the center of the bend shall be greater than the side length of the rectangular air duct, and the diameter of the circle shall be 1.25 times. Large section air duct shall be equipped with deflector in the pipe to reduce resistance. In the actual installation and construction, less such treatment. For reducer, it is not allowed to change the diameter suddenly. It is better to be a gradually expanding (shrinking) pipe. The expansion angle of each side of the gradually expanding pipe shall be greater than 15 °, and the contraction angle of each side of the gradually shrinking pipe shall be less than 30 °. The tee of the rectangular air duct shall be bent and divided along the air flow elbow, and the branch pipe shall also have a certain curvature radius. In case of 90 ° angle diversion, a deflector shall be added in the elbow.
    在运行中,有时管件的局部阻力远高于风管沿线的阻力,需要改进。管件主要有弯头、异径三通和四通。弯管曲率半径大于矩形风管边长,圆直径为1.25倍。大断面风道在管内设导流板,以减小阻力。在实际安装施工中,此类处理较少。对于减速器,不允许突然改变直径。更好是逐渐膨胀(收缩)的管子。渐缩管每侧的膨胀角应大于15°,渐缩管每侧的收缩角应小于30°。矩形风管的三通应沿气流弯头弯折、分格,支管也应有一定的曲率半径。在90°角转向的情况下,应在弯管中增加一个偏转器。
    2. Energy saving in air conditioning purification
    2。空调净化节能
    Air conditioning purification is a large energy consumption, so energy saving measures should be paid attention to in design and construction. In the design, the division of system and area, the calculation of air supply volume, the determination of temperature and relative temperature, the determination of cleanliness level and air change frequency, the ratio of fresh air, the heat preservation of air duct, the influence of the bite form in the production of air duct on the air leakage rate, the influence of the connection angle of main pipe and branch pipe on the air flow resistance, whether the flange connection is air leakage, etc., and the selection of air conditioning box, fan, water chiller and other equipment are none One is not related to energy consumption, so these details must be taken into account.
    空调净化能耗大,在设计和施工中应注意节能措施。在设计中,对系统和区域的划分、送风量的计算、温度和相对温度的确定、洁净度水平和换气次数的确定、新风比例、风管的保温、风管生产中咬口形式对漏风的影响速率、干管与支管连接角度对气流阻力的影响、法兰连接是否漏气等,以及空调箱、风机、冷水机组等设备的选择都不是一个与能耗无关的因素,因此必须考虑这些细节。
    3. Select air conditioning box according to climate conditions
    三。根据气候条件选择空调箱
    As for the selection of air conditioning box, the climate environment should be considered. For example, in the north area with low temperature and large dust content in winter, the new air preheating section shall be added to the general air conditioning unit, and the water spraying air treatment mode shall be adopted, so that it can not only wash the air dust, but also generate the heat exchange to meet the required temperature and humidity. In the south of China, where the climate is humid and the dust concentration in the air is low, there is no need to preheat the fresh air in winter. The primary filter is used to filter the air and adjust the temperature and humidity. The surface cooling surface regulates the temperature and humidity. It can also strengthen the temperature and humidity reduction process, and then through the intermediate filter and terminal high-efficiency or sub high-efficiency filter. The air conditioning box is equipped with variable frequency fan, which can not only save energy, but also flexibly adjust the air volume and pressure.
    空调箱的选择应考虑气候环境。如北方冬季气温低、含尘量大的地区,在普通空调机组上增设新风预热段,采用喷水式空气处理方式,既能清洗空气中的粉尘,同时也产生热交换,以满足所需的温度和湿度。我国南方气候潮湿,空气中粉尘浓度低,冬季无需对新鲜空气进行预热。粗滤器用于过滤空气和调节温度和湿度。表面冷却表面调节温度和湿度。它还可以强化温湿度降低过程,然后通过中间过滤器和末端或亚过滤器。空调箱配有变频风机,不仅节能,还可灵活调节风量和压力。
    4. Telephone and fire alarm equipment are indispensable
    四。电话和火警设备是必不可少的
    The clean workshop is equipped with telephone and intercom telephone, which can reduce people's walking in the clean area, reduce the amount of dust generation, and timely contact with the outside in case of fire, and create conditions for normal working contact. In addition, a fire alarm system shall be set up to prevent the fire from being easily found outside and causing significant economic losses.
    洁净厂房内设有电话和对讲电话,可减少人们在洁净区内的行走,减少粉尘产生量,火灾时能及时与外界联系,为正常工作联系创造条件。此外,还应设置火灾报警系统,防止火灾在室外轻易发现,造成重大经济损失。
    5. Multiple chillers are more flexible
    5个。多台冷水机组更灵活
    If the cooling capacity of the chiller is required to be large, it is not suitable to select a single machine, it is better to use multiple mechanisms, and the motor is better to use frequency conversion speed regulation to reduce the starting power. Multiple machines can be used flexibly, so as not to waste energy.
    如果要求冷水机组的制冷量较大,不宜选用单机,宜采用多机构,电动机宜采用变频调速以降低起动功率。多机灵活使用,不浪费能源。
    6. Automatic control device ensures full adjustment
    6。自动控制装置确保完全调节
    At present, some manufacturers use the manual way to control the air volume and air pressure, but because the regulating valves controlling the air volume and air pressure are in the technical compartment, and the ceiling is also the soft ceiling of color steel plate, which is basically adjusted during the installation and commissioning. Since then, most of them have not been adjusted, and in fact, they cannot be adjusted.
    韦德国际1946手机版目前,一些厂家采用手动方式控制风量和风压,但由于控制风量和风压的调节阀在技术舱内,吊顶也是彩钢板的软吊顶,在安装调试时基本上都要进行调整。从那以后,大部分都没有调整,事实上,也无法调整。
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