CN-224216391-U - Gas-liquid component analysis pretreatment system

Abstract

The utility model discloses a gas-liquid component analysis pretreatment system which is used for the on-line component analysis of chemical waste gas or waste liquid and comprises a sampling device, a temperature control unit and a pressure monitoring unit, wherein the temperature control unit is used for cooling or preserving a medium to be analyzed through circulating cooling liquid, the medium to be analyzed output by the temperature control unit is conveyed to a precession type filter through a pressure pump and finally conveyed to chemical analysis equipment including a chromatograph for component analysis, a pressure transmitter is arranged on an output pipeline of the pressure pump and used for converting the monitored pressure into an electric signal and feeding the electric signal back to the pressure pump, and further the automatic start and stop of the pressure pump are controlled. The utility model can be applied to the analysis of chemical components of a medium to be analyzed, including gas or liquid.

Inventors

• SHI YINGJIE
• ZHANG LU
• ZHANG YUANSEN

Assignees

• 南京分析仪器厂有限公司

Dates

Publication Date

20260508

Application Date

20250422

Claims (10)

1. 1. The system is used for on-line component analysis of chemical waste gas or waste liquid, and comprises a sampling device, a temperature control unit and a pressure monitoring unit, and is characterized in that the temperature control unit cools or keeps the medium to be analyzed through circulating cooling liquid, the medium to be analyzed output by the temperature control unit is conveyed to a precession filter through a pressure pump, and finally is conveyed to chemical analysis equipment including a chromatograph for component analysis; the pressure pump output pipeline be provided with pressure transmitter, pressure transmitter be used for turning into the signal of telecommunication with the pressure of monitoring and feed back for the pressure pump, and then control the automatic start of pressure pump and stop.
2. 2. The system according to claim 1, wherein the pressure pump comprises two or more pressure pumps arranged in parallel for pressure control based on the pressure value monitored by the pressure transmitter.
3. 3. The system according to claim 1 or 2, wherein the pressure pump comprises a parallel straight-through pipeline, and the electromagnetic valve is used for controlling the on-off of the straight-through pipeline.
4. 4. The gas-liquid component analysis pretreatment system according to claim 2, wherein at least 1 of the two or more pressure pumps is provided as a return gas or a return liquid.
5. 5. The system according to claim 1, wherein the temperature control unit comprises a tube type cooling tank, and the cooling liquid circulated in the tube type cooling tank comprises heating the cooling liquid by passing through the heating device or cooling the cooling liquid by the cooling device.
6. 6. The system of claim 1, wherein the system comprises two sampling circuits, one of which is configured as a circuit, and wherein the residual gas from the output of the pressure pump and/or from the screw-in filter is fed back to the chemical waste gas/liquid discharge line.
7. 7. The system of claim 1, wherein the line through which the precession filter delivers the medium to be analyzed to the chemical analysis apparatus comprises a calibration unit, wherein the calibration unit comprises a device for gas calibration or liquid calibration.
8. 8. The gas-liquid component analysis pretreatment system according to claim 1, wherein the system comprises a plurality of flowmeters or pressure meters arranged on a medium to be analyzed transmission pipeline to monitor flow or pressure, and a temperature sensor arranged to detect the temperature of the medium to be analyzed.
9. 9. The gas-liquid component analysis pretreatment system of claim 1, wherein the system comprises a heat preservation environment comprising an incubator or a heat preservation layer disposed on a pipeline.
10. 10. The gas-liquid component analysis pretreatment system according to claim 2, wherein the system comprises a nitrogen back-flushing unit, and the nitrogen back-flushing unit is connected to an output end pipeline of the pressure pump.

Description

Gas-liquid component analysis pretreatment system Technical Field The utility model belongs to chemical analysis devices, and particularly relates to a gas-liquid component analysis pretreatment system. Background In the industrial production instrument analysis process, the sample pretreatment system is a precondition and guarantee that the online analysis system can normally operate, and in order to continuously and accurately perform online analysis of samples, the pretreatment system must provide safe, reliable, stable and effective samples. The pretreatment results of the sample can influence the measurement precision and result of the instrument, and can cause damage to the instrument and even production process accidents. The pretreatment system has single function and unstable device state, can perform treatments such as cooling, filtering, dust removal, pressure stabilization and the like on samples, and can treat samples in different states to meet the sample analysis of an online instrument. Disclosure of utility model The utility model aims to provide a gas-liquid component analysis pretreatment system which can be suitable for pretreatment of a medium to be analyzed including a gas medium or a liquid medium, including pretreatment such as cooling, heat preservation, filtration, dust removal, pressure stabilization and the like. The technical scheme is that the gas-liquid component analysis pretreatment system is used for on-line component analysis of chemical waste gas or waste liquid and comprises a sampling device, a temperature control unit and a pressure monitoring unit, wherein the temperature control unit cools or keeps the temperature of a medium to be analyzed through circulating cooling liquid, the medium to be analyzed output by the temperature control unit is conveyed to a precession type filter through a pressure pump and finally conveyed to chemical analysis equipment including a chromatograph for component analysis; the pressure pump output pipeline be provided with pressure transmitter, pressure transmitter be used for turning into the signal of telecommunication with the pressure of monitoring and feed back for the pressure pump, and then control the automatic start of pressure pump and stop. Further, the pressure pump comprises two or more pressure pumps which are arranged in parallel so as to regulate and control the pressure according to the pressure value monitored by the pressure transmitter. Further, the pressure pump comprises a through pipeline which is arranged in parallel, and the on-off of the through pipeline is controlled through an electromagnetic valve. Further, at least 1 of the two or more pressure pumps is provided for return air or return liquid. Further, the temperature control unit comprises a tube type cooling tank, and the cooling liquid circulated in the tube type cooling tank comprises heating liquid flowing through the heating device or cooling liquid cooling by the cooling device. Further, the system comprises two ways for sampling, wherein one way is set as a loop, and the rest gas discharged from the output end of the pressure pump and/or the screw-in filter is conveyed back to the chemical waste gas/waste liquid discharge pipeline. Further, the pipeline for conveying the medium to be analyzed to the chemical analysis equipment by the inlet filter comprises a calibration unit connected with the pipeline, and the calibration unit comprises a gas calibration or liquid calibration device. Further, the system comprises a plurality of flowmeters or pressure meters arranged on a medium to be analyzed transmission pipeline to monitor the flow or the pressure, and a temperature sensor arranged to detect the temperature of the medium to be analyzed. Further, the system comprises a heat preservation box or a heat preservation layer arranged on a pipeline, wherein the heat preservation box is arranged in a heat preservation environment. Further, the system comprises a nitrogen back-flushing unit, and the nitrogen back-flushing unit is connected to an output end pipeline of the pressure pump. The utility model has the beneficial effects that the utility model comprises the shell and tube type water cooling tank, the temperature of the sample can be effectively regulated, and the sample can be cooled by introducing cold water or be insulated by introducing hot water. The system also comprises a pressure pump based on pressure transmitter control, and is suitable for not only the condition of too low sample pressure, but also the condition of higher pressure. Aiming at a medium to be analyzed of gas or liquid, the utility model comprehensively adopts a pipeline filter, a precession filter and a two-pass filter, and adopts multistage filtration to purify a sample and protect an instrument. Drawings FIG. 1 is a block diagram of one implementation of the system of the present utility model. Detailed Description The utility model provides a gas-liquid component analys