Ammonia gas monitoring alarming and switching system and method based on chromatographic analysis

A chromatographic analysis and switching system technology, applied in the field of gas detection and alarm, can solve the safety hazards of on-site production staff, the quality of desilane products, etc., achieve high application and promotion significance, avoid environmental pollution problems, and flexibly select and switch Effect

Active Publication Date: 2015-04-29
NANJING SPECIAL GAS FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the ammonia gas is not well controlled or leaks, it will not only reduce the quality of silane products, but also easily cause environmental pollution, which will bring great safety hazards to the on-site production staff

Method used

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  • Ammonia gas monitoring alarming and switching system and method based on chromatographic analysis
  • Ammonia gas monitoring alarming and switching system and method based on chromatographic analysis
  • Ammonia gas monitoring alarming and switching system and method based on chromatographic analysis

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Experimental program
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Effect test

Embodiment 1

[0035] System embodiment 1: such as figure 1 and figure 2 As shown, the ammonia monitoring alarm and switching system based on chromatographic analysis provided by Embodiment 1 of this system includes the intake pipe of the first monitoring point, the intake pipe of the second monitoring point, the sampling gas pump 3, the six-way flat valve, the chromatographic column 6, Thermal conductivity detector 7, monitoring alarm platform and purifier switching device; the six ports of the six-way planar valve are numbered clockwise in sequence: port one to port six; the ports of the six-way planar valve A quantitative tube 5 is connected between the first port and the fourth port.

[0036] The inlet pipe of the first monitoring point is arranged at the outlet of the purifier, and the inlet pipe of the second monitoring point is arranged in the ammonia tank area. The inlet pipe of the first monitoring point communicates with the sampling air pump through the first electromagnetic va...

Embodiment 2

[0042] System embodiment 2: The ammonia gas monitoring alarm and switching system based on chromatographic analysis provided by this embodiment includes the first monitoring point intake pipe, sampling gas pump, six-way flat valve, chromatographic column, thermal conductivity detector, monitoring and alarm platform and Purifier switching device; the six ports of the six-way planar valve are numbered clockwise in sequence: port one to port six; a quantitative tube is connected between port one and port four of the six-way planar valve ;

[0043] The inlet pipe of the first monitoring point communicates with the sampling gas pump through the first electromagnetic valve; the output of the sampling gas pump communicates with port 6 of the six-way planar valve; port 2 of the six-way planar valve communicates with the carrier gas pipe, Port five is connected to the emptying pipe; port three of the six-way planar valve and the monitoring and alarm platform are sequentially connected ...

Embodiment 3

[0049] System Embodiment 3: The structure is basically the same as any one of System Embodiment 1 and System Embodiment 2, and the similarities will not be described again. The difference is that it includes two or more monitoring point intake pipes, each The intake pipes of the monitoring points are connected with the sampling air pumps through their corresponding solenoid valves; the pneumatic multi-way valves can be configured between each solenoid valve and the sampling air pumps according to the actual structure for the selection of the intake pipes of the monitoring points. The electromagnetic valves connected to the air intake pipes of the monitoring points are all connected to the circuit of the monitoring and alarm platform.

[0050] The purifier switching device includes a mixed gas inlet, a second controller and more than two groups of purifiers; the inlets of each group of purifiers communicate with the mixed gas inlet through their corresponding electromagnetic val...

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PUM

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Abstract

The invention discloses an ammonia gas monitoring alarming and switching system and an ammonia gas monitoring alarming and switching method based on chromatographic analysis. The ammonia gas monitoring alarming and switching system comprises a first monitoring point air inlet pipe, a sampling air pump, a six-way plane valve, a chromatographic column, a heat-conducting detector, a monitoring alarm platform and a purifier switching device, wherein the monitoring alarm platform is connected with the purifier switching device, a first electromagnetic valve, the sampling air pump and the six-way plane valve through a circuit. According to the ammonia gas monitoring alarming and switching system, ammonia gas detecting and alarming of a plurality of monitoring points such as an ammonia gas tank zone or a purifier outlet can be achieved; alarming can be carried out to remind and timely dispose in the first time once amino gas leakage occurs, so that the operation safety is improved; meanwhile, the problem of environmental pollution is effectively avoided; meanwhile, flexible selecting and switching of sampling points can be carried out; furthermore, a switching signal can also be output to the purifier switching device through the monitoring alarm platform; automatic switching of the purifier is carried out, so that the purification effect and efficiency are improved to a great extent; and the ammonia gas monitoring alarming and switching system has relatively high application and popularization significance.

Description

technical field [0001] The invention relates to the field of gas detection and alarm, in particular to an ammonia gas monitoring, alarm and switching system and a corresponding monitoring, alarm and switching method. Background technique [0002] As we all know, the silane production process of magnesium silicide method is inseparable from ammonia. Usually, in the environment of liquid ammonia, magnesium silicide alloy reacts with ammonium chloride to generate silane and ammonia gas, and then the ammonia and silane are separated at low temperature, and the residual ammonia passes through the molecular sieve purification system. Remove. [0003] Throughout the production process, there are liquid ammonia storage tanks, silane reaction waste residue tanks, ammonia gas tank farms, etc., including ammonia pipelines and valves, etc., and ammonia exists in every production link. Once the ammonia gas is not well controlled or leaks, it will not only reduce the quality of silane pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/66
Inventor 林培川
Owner NANJING SPECIAL GAS FACTORY
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