制氮机、
PSA nitrogen generator
采用气体分离工艺将空气中的氮气和氧气，采用分离方式制取氮气。
1、CMS（碳分子筛）分离空气
CMS（碳分子筛）是经特殊处理的活性炭，它的孔径在氮气和氧气分子直径范围内。由于氧分子比氮分子体积小，重量轻，因此先被吸附在碳分子筛表面。大部份氮分子处在游离状态。
2、变压吸附（PSA）
空气压力越高，CMS表面所吸附的气体分子越多。净化后的压缩空气由塔底进入吸附塔，并由下向上流经整个塔体。
吸附塔内充满了CMS（碳分子筛），气体通过时，氧分子和氮分子在CMS表面吸附，由于分子直径不同，氧分子吸附在CMS表面多于氮分子。根据流经吸附塔空气的速度，大多数氧分子被吸附，氮分子由吸附塔上端流出。
流速决定了气体在吸附塔中的吸附时间，即氧分子的吸附时间：
流速高，氧吸附时间短，产品气中剩余氧含量高，氮气纯度低。
流速低，氧吸附时间长，产品气中剩余氧含量低，氮气纯度高。
经过一段时间后，CMS被所吸附的氧分子饱和需进行再生，再生是通过降压解吸实现的。由于CMS在低压时吸附气体分子量减少，大多数氧分子在降压时离开CMS处在游离状态。被排空，这一过程称为解吸。
为达到连续供气，一塔处于吸附生产时，另一塔为再生状态，为再吸附生产准备。
整个过程由可编程控制器（PLC）指挥，实现自动化生产。
3、工艺步骤
本装置共有三个部分：
A、空气的压缩及净化
B、PSA分离空气，制取氮气
C、氮气储存和供气
整个工艺流程图和控制系统原理图附在的册后。
A、压缩空气生成和净化
空气经空压机压缩至800Kpa，储存贮罐内，经过C级过滤器除去空气中大颗粒的水与油。系统空气连续在T级及A级过滤器净化。从而达到PSA所需空气质量，其指标如下：
。残油含量≤0.003mg/m3(at21℃)
。残余粉尘≤0.01um
。残余水含量≤5.57g/m3
。PSA制氮系统产生的氮气送入氮气贮罐储存。
B、PSA分离空气制氮
压缩净化后的空气通过球阀进入吸附塔A或B
气体流向由气动阀QV1…QV8控制，而八只气动阀由八只电磁阀控制开与关的动作，电磁阀的信号由可编程控制器PLC提供，实现自动化生产。
应用领域：
热处理：光亮淬火、光亮退火、渗碳、可控气氛、粉末金属烧结
煤炭工业：煤矿防灭火，煤矿中的瓦斯气置换
电子工业：大规模集成电路、彩电显像管、电子元件及半导体处理
化学工业：覆盖、惰性气体保护、压力传输、油漆、食用油搅拌
食品工业：食品包装、啤酒保鲜、非化学消毒、水果和蔬菜保鲜
医药工业：药品充氮包装、运输和保护，药料气动传输
石油工业：氮气钻井、油井维修、精炼、天然气回收
玻璃工业：浮法玻璃生产中的气体保护
化肥工业：氮肥原料，触媒保护，洗涤气
医药工业：药品充氮包装、运输和保护，药料气动传输
橡胶工业：交联电缆生产和橡胶制品生产防老化保护
文物保护：文物、丝织品、书画、青铜器等的惰性气保护
Nitrogen
The gas separation process using atmospheric nitrogen and oxygen separation method using the preparation of nitrogen.
1, CMS (carbon molecular sieve) for separating air
CMS (carbon molecular sieve) is specially treated activated carbon, its aperture in the diameter range of nitrogen and oxygen molecules. Since the oxygen molecules to nitrogen molecules are small size, light weight, and therefore the first to be adsorbed on the surface of the carbon molecular sieve. Most of the nitrogen molecule in the free state.
2, pressure swing adsorption (PSA)
The higher the air pressure, the more gas molecules adsorbed on the surface of the CMS. Compressed air purification after entering the adsorption tower from the bottom by the bottom-up flow through the entire tower.
The adsorption tower filled with CMS (carbon molecular sieves), through the gas, the oxygen molecules and nitrogen molecules adsorbed on the surface of CMS, due to the different molecular diameter, oxygen molecules adsorbed on the surface of CMS than nitrogen molecules. Depending on the speed of the air flowing through the adsorption tower, most of the oxygen molecules are adsorbed nitrogen molecules adsorbed by the upper end of the column effluent.
It determines the flow rate of gas adsorption time in the adsorption tower that oxygen molecules adsorption time:
High flow rate, oxygen absorption time is short, high residual oxygen content in the product gas, low nitrogen purity.
Low flow rate, oxygen absorption time long, low residual oxygen content in the product gas, high purity nitrogen.
After some time, oxygen molecules are adsorbed by the CMS saturated need of regeneration, the regeneration is implemented by buck desorption. Because CMS adsorbed gas at low pressure to reduce the molecular weight, most of the oxygen molecules away from CMS in the free state when the buck. Is evacuated, a process known as desorption.
In order to achieve continuous gas supply, a tower in the adsorption of production, another tower for the regeneration state, ready for the re-absorption of production.
The whole process by a programmable logic controller (PLC) command, automated production.
3, the process steps
The device consists of three parts:
A, air compression and purification
B, PSA air separation, generating nitrogen
C, and nitrogen gas storage
The entire process flow diagram and control system theory attached after the album chart.
A, compressed air generation and purification
Air compressed by the compressor to 800Kpa, stored within the tank, remove the air filter through the C-class large particles of water and oil. Continuous air purification system in the T and A level grade filter. So as to achieve the desired air quality PSA, which indicators are as follows:
. Residual oil content ≤0.003mg / m3 (at21 ℃)
. Residual dust ≤0.01um
. Residual water content ≤5.57g / m3
. Nitrogen PSA system produces nitrogen into nitrogen storage tank.
B, PSA nitrogen air separation
The compressed air is purified through ball into the adsorption column A or B
Gas flow from the pneumatic control valve QV1 ... QV8, and eight from the eight pneumatic valve solenoid valve opening and closing operation of the signal solenoid valve is provided by programmable logic controller PLC, automated production.
Rationality: design optimization, technology and reasonable, advanced manufacturing technology. It uses advanced molecular sieve adsorption tower structure and filling technology, limiting airflow technology, the device reduced size, reduced power consumption, longer life.
Reliability: constitute the core components made by well-known domestic and foreign manufacturers of products.
For example: Germany CarboTech GmbH, Japan Takeda Chemical, Industries, Japan's Kuraray Chemical Co.Ltd, Germany BURKET, Sweden, Atlas Copco, Germany's Siemens and US companies such as UOP. Ensure that equipment life, stable operation, to ensure the system's reliability.
Low power consumption: unique adsorption tower structure, gas distribution systems, carbon molecular sieve filling process and out of air intake design, selection of imported high-quality carbon molecular sieve adsorption tower volume is reduced, the air consumption is reduced, thereby reducing power consumption is reduced.
Intelligent: The German company Siemens programmable logic controller (PLC), to adjust the different operating conditions, the equipment for optimum operation. Easy to operate, enabling unattended.
Long life: a unique air distribution system and molecular sieve filling technology, to minimize the impact of the airflow on the molecular sieve, sieve reduces wear, thereby enhancing the life of the equipment.
Easy maintenance: the design and manufacture of fully consider the maintenance and ease of maintenance, versatility and interchangeability, minimize the number of ancillary equipment and accessories, reduce points of failure, thereby reducing the amount of maintenance. We use standard components and in accordance with relevant international or national standards for manufacturing and production, so that equipment maintenance is more convenient and simple. As long as proper maintenance and use, periodic inspection and replacement of some wearing parts (such as filter cartridge, etc.), nitrogen system enables long-term, stable and normal operation.
Nitrogen gas separation process using the nitrogen in the air and oxygen separation method using nitrogen preparation.
Applications:
Heat treatment: bright quenching, bright annealing, carburizing, controlled atmosphere, powdered metal sintering
Coal industry: coal mine fire prevention and control, coal mine methane gas replacement
Electronics Industry: LSI, color TV picture tubes, electronic components and semiconductor processing
Chemical industry: covering, inert gas, pressure transmission, paint, oil stirring
Food industry: food packaging, beer fresh, non-chemical disinfection, fresh fruit and vegetables
Pharmaceutical Industry: Pharmaceutical nitrogen packaging, transport and protection, drug material pneumatic transmission
Oil industry: nitrogen drilling, workover, refining, gas recovery
Glass industry: the float glass production gas
Fertilizer industry: nitrogen fertilizer raw materials, catalyst protection, gas washing
Pharmaceutical Industry: Pharmaceutical nitrogen packaging, transport and protection, drug material pneumatic transmission
Rubber Industry: XLPE cable and rubber products manufacturing anti-aging protection
Conservation: Heritage, silk, paintings, bronzes and other inert gas protection
