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Application of NMR analyzer
Time:2015-01-14

NMR online analyzer system mainly consists of NMR analyzer, sample treatment system, prediction pattern (also be called metrological model) and corresponding control and display system.

NMR(MRA)analyzer is the core of the system, which is composed of analysis section-magnet box, control and analysis section-electric box and safeguards section-relevant external equipment and pneumatic system.

Sample treatment system is responsible for providing the analyzer with qualified sample.

It consists of following sections: sample treatment, sample switch, sample delivery and sample return after analyzing. Prediction model is an analysis software package that is used to direct quantize quantity of material inside the process pipe.

weather condition

Mean annual relative humidity

Mean annual maximum relative humidity

Mean annual minimum relative humidity

Monthly mean of relative humidity in summer

Monthly mean of relative humidity in winter

Average temperature of the whole year

Absolute maximum temperature

Absolute minimum temperature

Monthly mean of daily maximum temperature for hottest month

Monthly mean of daily minimum temperature for coldest month

Height above sea level: 50-100m

Power ................................. 220VAC,7KVA,50Hz

Ventilation for instrument.......no lower than 4.0Bar in pressure

Phone line.......special, direct dialing, analog signal.

Sample pretreatment system

Sample pretreatment system is responsible for receiving sample collected from sample pipeline. After filtering and homothermal treatment, sample will reach controllable

speed and temperature before reaching the analyzer. After being analyzed, sample will

return to the process pipeline, or direct enter user designated place.

The sample pretreatment system, designed and supplied by seller, must meet following requirements under any circumstances:

Liquid phase of the material entering NMR analyzer must be homogeneous. Two phase flow is totally prohibited. After being treated by the pretreatment system, the flow rate of material inside the analyzer must meet analyzer’s requirement: 60-100 L/H, (15.8 – 26.3G/H).

After being treated, the temperature of the material should be stable and stay around the set value. Deviation value of it should be kept within 2.5℃.The selection of set value

Should not create any influence on the smooth flow of material and be lower than the flash point of any material inside the pipe. Because each online analysis project has specific

Set value, the set value of temperature for specific project will be determined in relevant kick of meeting.

Particle with diameter exceeding 100 micron will be strained away;

ThePressure value inside the process pipe system should be 6~25Kg/cm2

PrePressure loss of the sample pretreatment system should be kept below 5 Kg/cm2

The size of pipe that is used for the connection between pretreatment system and analysis instrument should be 6mm in diameter. Pipeline around the analyzer, heat insulator and

temperature controller are within the scope of supply.

The design of sample pretreatment system meet cycle period requirement between materials.

See section 4 for detailed information.

In case that multi paths exists between sample pipeline and analyzer, the pretreatment system should contain equipment required by material switch system and condition control system.

The seller can perform automatic switching control on all material via a PLC template located inside the host unit of MRA analyzer. Sample temperature will be kept between the lowest and the highest temperature that can be accepted by the system. The pressure of the system is also kept at a suitable level under which sample can be conveyed timely.

Technical scheme

*Application device

CDU

Requirement on class of explosive proof

ATEX II 2 G Eex p II T4

installation position of instrument

local analysis room

*material analysis

the number of material to be analyzed

3

 

name of material

pressure(KPa)

temperature℃

flow rate(m/s)

freezing point℃

flash point℃

min

max

min

max

min

max

material #1:

Crude oil

2000

2760

30

40

0.38

0.77

15

TBD

material #2:

Often line 1 oil

800

1700

90

150

0.44

1.11

-48

TBD

material #3:

 

Often line 2 oil

700

1400

120

187

0.50

1.25

TBD

TBD

Number of NMR analyzer

1pcs台

Sample treatment system

(one pcs with 3 material paths)

DCS selection and communication protocol

CS3000

Cycle time for material analysis

7 minutes for each type of material

field power supply

220 VAC

Diagram on system structure