移动式化工气瓶室的设计与建设技术要求

　　Design and Construction Technical Requirements for Mobile Chemical Gas Cylinder Room

　　当化工需求的气体种类大于3种，或需储存3瓶以上的气体时，宜设立气瓶室，采用集中供气系统。什么时候设立钢瓶室

　　When there are more than three types of gases required for chemical engineering, or when more than three bottles of gas need to be stored, it is advisable to set up a gas cylinder room and use a centralized gas supply system. When will the steel cylinder room be established

　　集中供气系统的组成一般包括气源系统、切换系统、管道系统、调压系统、泄漏报警及紧急切断系统。

　　The composition of a centralized gas supply system generally includes a gas source system, a switching system, a pipeline system, a pressure regulating system, a leakage alarm and emergency shutdown system.

　　1.气源系统房屋结构：气瓶间具备防爆面和泄爆面，且泄爆比例大于22%，气瓶间不吊顶，内部屋顶为平顶；位置：气瓶间单独建设，远离办公场区，应该在地上一层合理位置，不设在地下室；形式：气瓶间泄爆面为空旷无人的场地，或朝天泄爆，气瓶间不得外小内大；种类：易燃气瓶与助燃气瓶分别放置，两者中间为防爆墙体隔断，氧化性和腐蚀性气体不放在一起，毒气或腐蚀性气体采用自动气柜；配置：气瓶间有通风、电源插座、照明等电器，且满足防爆要求。钢瓶有接地并防滑固定，气瓶间采用电化学或红外式的精密探头测试泄漏；空瓶和实瓶分开储存，距离不少于2m，且悬挂空瓶/满瓶标识。

　　1. Structure of the gas source system building: The gas cylinder room has explosion-proof and explosion-proof surfaces, and the explosion-proof ratio is greater than 22%. The gas cylinder room does not have a suspended ceiling, and the internal roof is flat; Location: The gas cylinder room should be built separately, away from the office area, and should be located in a reasonable position on the ground floor, not in the basement; Form: The venting surface between gas cylinders shall be an open and uninhabited area, or vented upwards. The gas cylinder room shall not be small on the outside and large on the inside; Type: Flammable gas cylinders and combustion assisting gas cylinders are placed separately, with explosion-proof walls separating them. Oxidative and corrosive gases are not placed together, while toxic or corrosive gases are stored in automatic gas cabinets; Configuration: The gas cylinder room is equipped with ventilation, power sockets, lighting and other electrical appliances, and meets explosion-proof requirements. The steel cylinder is grounded and non slip fixed, and precise electrochemical or infrared probes are used to test leaks between the cylinders; Empty and full bottles should be stored separately, with a distance of no less than 2 meters, and hung with empty/full bottle labels.

　　2.自动切换系统切换系统主要作用是保证后端气路的持续气体供给，当在用气源使用殆尽时，自动切换到备用气源，真正达到更换气体钢瓶时不会影响到后续的所有分析测试，同时保持高纯气体输送系统内的纯度，压力和流量恒定，起到气体不间断的作用；

　　2. Automatic switching system The main function of the switching system is to ensure continuous gas supply to the backend gas path. When the in use gas source is exhausted, it automatically switches to the backup gas source, ensuring that replacing the gas cylinder will not affect all subsequent analysis and testing. At the same time, it maintains the purity, pressure, and flow rate of the high-purity gas delivery system, playing a role in uninterrupted gas supply;

　　与报警系统连接，可以监视气瓶使用状况，当压力下降到设定压力值时，将发出报警信号，提示工作人员更换气瓶，从而不耽误化工的工作进度。

　　Connected to the alarm system, it can monitor the usage status of gas cylinders. When the pressure drops to the set pressure value, an alarm signal will be issued to prompt the staff to replace the gas cylinder, so as not to delay the progress of chemical work.

　　3.管道系统主要由不同规格的304或316不锈钢材质制成的管线和配件组成，根据输送的气体种类和使用要求，再选择相应的材质，常见的不锈钢管根据表面抛光工艺的不同可分为EP电解抛光不锈钢管、BA化学抛光不锈钢管2种。

　　3. The pipeline system is mainly composed of pipelines and fittings made of 304 or 316 stainless steel materials of different specifications. According to the type of gas being transported and the requirements of use, the corresponding materials are selected. Common stainless steel pipes can be divided into EP electrolytic polished stainless steel pipes and BA chemical polished stainless steel pipes according to different surface polishing processes.

　　4.调压系统主要由各种阀门组成，实现介质的开启关闭与调节作用。根据化工仪器配置和气体使用要求，在楼层、房间、实验台、仪器使用终端配置相应的气体减压阀和截止阀，以满足各种仪器设备对使用气体的不同需求。常见的阀门有：减压门、球阀、针阀、单向阀等。

　　4. The pressure regulating system is mainly composed of various valves to achieve the opening, closing, and regulating functions of the medium. According to the configuration of chemical instruments and gas usage requirements, corresponding gas pressure reducing valves and shut-off valves are installed on floors, rooms, experimental benches, and instrument usage terminals to meet the different gas needs of various instruments and equipment. Common valves include pressure reducing valves, ball valves, needle valves, check valves, etc.

　　5.泄漏报警和紧急切断系统泄漏报警：主要是针对易燃易爆和有毒气体。当危险气体发生泄漏时，侦测器会发生声光报警并且输出一组开关量报警信号给PLC系统，PLC系统通过处理输出几组相对应开关量报警信号，一组预留可给VAV控制器的风机控制模块或消防接口等，另外一组给紧急切断阀切断泄漏气体的供气；

　　5. Leakage alarm and emergency shutdown system leakage alarm: mainly targeting flammable, explosive, and toxic gases. When a dangerous gas leaks, the detector will sound and light an alarm and output a set of switch alarm signals to the PLC system. The PLC system processes and outputs several sets of corresponding switch alarm signals. One set is reserved for the fan control module or fire interface of the VAV controller, and the other set is used to cut off the gas supply of the leaked gas to the emergency cut-off valve;

　　紧急切断：当气体泄漏时，侦测器会声光报警同时会输出一组开关量的报警信号给PLC系统，PLC系统通过处理同时输出一组相对应开关量报警信号给电磁阀，使电磁阀断电从而使气动阀闭合，达到切断气源的目的，以保证供气的安全。

　　Emergency shutdown: When gas leaks, the detector will sound and light an alarm and output a set of switch alarm signals to the PLC system. The PLC system will process and output a corresponding switch alarm signal to the solenoid valve, causing the solenoid valve to power off and the pneumatic valve to close, achieving the purpose of cutting off the gas source and ensuring the safety of gas supply.

　　气瓶室其他要求

　　Other requirements for gas cylinder room

　　1、气瓶室应保持阴凉、干燥、严禁明火、远离热源；2、气瓶室应有每小时不小于3次换气的通风措施；3、气瓶室宜建在实验楼旁侧，应配备防爆灯、防爆开关和防气体渗漏报警装置，墙壁需专门设计、施工，具有一定防爆级别；4、对于一些易燃易爆的气体，如氢气、乙炔等，在设计之初和施工过程中会和其他惰性气体不同，应加入气体回火防止器等安全装置。

　　1. The gas cylinder room should be kept cool, dry, strictly prohibited from open flames, and away from heat sources; 2. The gas cylinder room should have ventilation measures with no less than 3 air changes per hour; 3. The gas cylinder room should be built next to the laboratory building and equipped with explosion-proof lights, explosion-proof switches, and gas leakage alarm devices. The walls should be specially designed and constructed with a certain explosion-proof level; 4. For some flammable and explosive gases, such as hydrogen, acetylene, etc., they may be different from other inert gases during the design and construction process, and safety devices such as gas flashback arresters should be added.

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