System having a pre-separation unit

Patent metadata

Field	Value
Publication number	US-2019145930-A1
Application number	US-201716098018-A
Country	US
Kind code	A1
Filing date	Sep 8, 2017
Priority date	Sep 8, 2016
Publication date	May 16, 2019
Grant date	—

Abstract

There is provided a system including a monitoring unit that analyzes, using a sensor, components of a first gas which may include first components and a pre-separation unit disposed upstream of the monitoring unit. The pre-separation unit includes: a first supply line that supplies the first gas to the monitoring unit; a second supply line that supplies a second gas, which includes components obtained by removing the first components from the first gas using a first separator, to the monitoring unit; and an automatic valve station that periodically switches between the first supply line and the second supply line to alternately supply the first gas and the second gas to the monitoring unit.

First claim

1 . A system comprising:
a monitoring unit that is configured to analyze, using a sensor, components of a first gas that has a possibility of including first components; and a pre-separation unit disposed upstream of the monitoring unit, wherein the pre-separation unit includes: a first supply line that is configured to supply the first gas to the monitoring unit; a second supply line that is configured to supply a second gas that includes components obtained by removing the first components from the first gas using a first separator, to the monitoring unit; and an automatic valve station that is configured to periodically switch between the first supply line and the second supply line to alternately supply the first gas and the second gas to the monitoring unit.

2 . The system according to claim 1 ,
wherein the automatic valve station includes a first valve that is configured to shut off the first supply line in a short time when the monitoring unit has detected the first components that include a component which contaminates the sensor.

3 . The system according to claim 1 ,
wherein the first separator includes: a porous filter with one surface across which the first gas flows; and a shell that covers another surface of the filter and collects the second gas that has passed through the filter, and the system further comprises: a first exhaust system that is configured to exhaust via the monitoring unit; and a second exhaust system that is configured to exhaust the first gas via the first separator.

4 . The system according to claim 3 ,
wherein the filter is a cylindrical porous filter and the first gas flows inside of the cylindrical porous filter, and the shell is cylindrical and covers an outside of the filter.

5 . The system according to claim 3 ,
wherein the filter includes a filter that does not transmit the first components which include at least one of an organic high molecule and an organosilicon compound.

6 . The system according to claim 3 ,
wherein the filter includes either a hybrid silica membrane or a molecular-imprinted polymer membrane.

7 . The system according to claim 1 ,
further comprising a heater that heats the first supply line and the second supply line to 220° C. or below.

8 . The system according to claim 1 ,
wherein the monitoring unit includes a unit that ionizes gas that is to be analyzed, and the system further comprises a control unit that is configured to change an ionization voltage of the unit that ionizes in conjunction with switching between the first supply line and the second supply line.

9 . The system according to claim 8 ,
wherein the control unit includes a first functional unit that is configured to periodically switch between: a first mode in which the first gas supplied by the automatic valve station via the first supply line is measured at a first ionization voltage; and a second mode in which the second gas supplied via the second supply line is measured at a second ionization voltage that is lower than the first ionization voltage, for a longer time than in the first mode.

10 . The system according to claim 8 ,
wherein the control unit includes a second functional unit that is configured to perform an emergency shutoff of the first supply line using the automatic valve station when the monitoring unit has detected the first components.

11 . The system according to claim 10 ,
wherein the automatic valve station includes valves for emergency shutoff respectively of the first supply line and the second supply line, and the second functional unit controls the valves for emergency shutoff respectively.

12 . The system according to claim 1 ,
wherein the sensor is a mass spectrometer unit.

13 . The system according to claim 1 , further comprising:
a chamber that is configured to freeze dry a product; a unit that is configured to place the chamber at a negative pressure; a unit that is configured to supply a third gas for pressurization purposes to the chamber; and a line that is configured to supply exhaust gas from the chamber to the pre-separation unit as the first gas, wherein the second supply line supplies the second gas that includes components of the third gas.

14 . A control method for a system which includes: a monitoring unit that analyzes, using a sensor, components of a first gas which may include first components; and a pre-separation unit disposed upstream of the monitoring unit, wherein the pre-separation unit includes: a first supply line that supplies the first gas to the monitoring unit; a second supply line that supplies a second gas that includes components obtained by removing the first components from the first gas using a first separator, to the monitoring unit; and an automatic valve station that switches between the first supply line and the second supply line to supply to the monitoring unit,
the control method comprising: periodically switching by the automatic valve station, between the first supply line and the second supply line to alternately supply the first gas and the second gas; and measuring components included in the first gas and the second gas alternately using the monitoring unit.

15 . The control method according to claim 14 ,
further comprising shutting off the first supply line by the automatic valve station in a short time when the monitoring unit has detected the first components that contaminate the sensor.

16 . The control method according to claim 14 ,
wherein the measuring includes a first mode in which the first gas supplied by the automatic valve station via the first supply line is measured at a first ionization voltage; and a second mode in which the second gas supplied via the second supply line is measured at a second ionization voltage, which is lower than the first ionization voltage, for a longer time than in the first mode.

17 . The control method according to claim 14 ,
wherein the system further includes a chamber that freeze dries a product; a unit that places the chamber at a negative pressure; and a unit that supplies a third gas for pressurization purposes to the chamber, and the first gas includes an exhaust from the chamber, and the control method further includes controlling a process that freeze dries the product inside the chamber according to a monitoring result of the monitoring unit for the second gas that includes the third gas.

Assignees

• Atonarp Inc

Inventors

• Murthy Prakash Sreedhar
• Boumsellek Said

Classifications

• H01J49/0422

  for gaseous samples (interfaces to gas chromatographs G01N30/7206) · CPC title

• G01N1/2226

  Sampling from a closed space, e.g. food package, head space · CPC title

• F26B5/10

  the process involving freezing · CPC title

• G01N1/22

  in the gaseous state {(specially adapted for biological material G01N33/497; measuring breath flow A61B5/087)} · CPC title

• G01N1/2205

  with filters · CPC title