CN216979072U

CN216979072U - Portable crude oil liquid phase hydrogen sulfide detection device

Info

Publication number: CN216979072U
Application number: CN202220440760.4U
Authority: CN
Inventors: 李皓; 许丹; 王一然; 苏航; 王德治; 张一丁; 孙祖一; 尤金龙; 麻广; 赵辉社
Original assignee: Xuzhou Jinqiao Petrochemical Pipeline Transportation Technology Co ltd; China Oil and Gas Pipeline Network Corp; Pipechina Eastern Crude Oil Storage and Transportation Co Ltd
Current assignee: Xuzhou Jinqiao Petrochemical Pipeline Transportation Technology Co ltd; China Oil and Gas Pipeline Network Corp; Pipechina Eastern Crude Oil Storage and Transportation Co Ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-07-15
Anticipated expiration: 2032-03-01

Abstract

The utility model provides a portable crude oil liquid phase hydrogen sulfide detection device, which comprises a PLC (programmable logic controller), a display screen, a battery, a drying pipe, a flowmeter, a pump a, a pump b, a test pipe, a liquid trap, a membrane filter, a cylindrical filter, a hydrogen sulfide sensor and an absorption pipe, wherein the PLC is connected with the display screen; the drying pipe, the flowmeter, the pump a, the testing pipe, the liquid trap, the membrane filter, the cylindrical filter and the absorption pipe are sequentially communicated through a pipeline to form a first passage; one end of the pump b is connected to the flowmeter, and the other end of the pump b is connected to the cylindrical filter, so that a second passage formed by the drying pipe, the flowmeter, the pump b, the cylindrical filter and the absorption pipe is formed; the hydrogen sulfide sensor is connected to a pipeline between the cylindrical filter and the absorption pipe; the design of the utility model can fully volatilize the hydrogen sulfide in the crude oil sample, does not need to be provided with a chemical reagent, and can quickly and accurately detect the content of the hydrogen sulfide in the crude oil.

Description

Portable crude oil liquid phase hydrogen sulfide detection device

Technical Field

The utility model relates to the technical field of hydrogen sulfide detection, in particular to a portable crude oil liquid phase hydrogen sulfide detection device.

Background

At present, the determination of the content of hydrogen sulfide in crude oil mostly adopts manual operation, and common detection methods comprise: ion chromatography, iodometry, lead acetate reaction, and spectrophotometer. The liquid phase hydrogen sulfide of crude oil needs more instruments and chemical agents, the operation steps are complex, and the operation time is long. The existing national standard and the existing standard for detecting the crude oil liquid phase hydrogen sulfide generally adopt an iodometry method, but the methods are complex to operate, and more reagents are prepared before the test, so the methods are not suitable for the rapid detection of the crude oil liquid phase hydrogen sulfide.

SUMMERY OF THE UTILITY MODEL

In view of the above technical shortcomings, the present invention provides a portable device for detecting liquid phase hydrogen sulfide in crude oil, so as to solve the above problems in the background art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a portable crude oil liquid phase hydrogen sulfide detection device comprises a PLC (programmable logic controller), a display screen, a battery, a drying pipe, a flowmeter, a pump a, a pump b, a test pipe, a liquid trap, a membrane filter, a cylindrical filter, a hydrogen sulfide sensor and an absorption pipe;

the drying pipe, the flowmeter, the pump a, the testing pipe, the liquid trap, the membrane filter, the cylindrical filter and the absorption pipe are communicated in sequence through pipelines to form a first passage; one end of the pump b is connected to the flowmeter, and the other end of the pump b is connected to the cylindrical filter to form a second passage formed by the drying pipe, the flowmeter, the pump b, the cylindrical filter and the absorption pipe; the hydrogen sulfide sensor is connected to a pipeline between the cylindrical filter and the absorption pipe;

the flowmeter, the pump a, the pump b, the hydrogen sulfide sensor, the display screen and the battery are respectively electrically connected with the PLC.

Preferably, the device also comprises an absorption tube interface, a drying tube interface, a test tube interface and a filter interface; the drying pipe interface is connected to a pipeline between the drying pipe and the flowmeter; the test tube interface is connected to a pipeline between the pump a and the test tube; the filter interface is connected to a pipeline between the membrane filter and the cylindrical filter; the absorption tube interface is connected to a pipeline between the hydrogen sulfide sensor and the absorption tube.

The design of the utility model can fully volatilize the hydrogen sulfide in the crude oil sample, does not need to be provided with a chemical reagent, and can quickly and accurately detect the content of the hydrogen sulfide in the crude oil.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic view of the piping connection of the present invention.

Detailed Description

The utility model will be further explained with reference to the drawings.

As shown in fig. 1, a portable crude oil liquid phase hydrogen sulfide detection device is provided with a panel, and comprises a PLC controller, a display screen, a battery, a drying tube, a flowmeter, a pump a, a pump b, a test tube, a liquid trap, a membrane filter, a cylindrical filter, a hydrogen sulfide sensor, and an absorption tube;

Furthermore, the device also comprises an absorption tube interface, a drying tube interface, a test tube interface and a filter interface which are arranged on the panel; the interface of the drying pipe is connected to a pipeline between the drying pipe and the flowmeter; the test tube interface is connected to the pipeline between the pump a and the test tube; the filter interface is connected to a pipeline between the membrane filter and the cylindrical filter; the absorption tube interface is connected to the pipeline between the hydrogen sulfide sensor and the absorption tube.

The device is based on the basic principle of Henry's law, and calculates the concentration of hydrogen sulfide in liquid by testing the concentration of hydrogen sulfide in gas phase.

Henry's law: at a certain temperature, the partial pressure pB of a volatile solute B in a dilute solution in an equilibrium gas phase is in direct proportion to the mole fraction xB of the solute B in an equilibrium liquid phase:

pB＝kx,B·xB

kx, B is the Henry constant, which is related to T and the nature of the solvent and solute.

The working process is as follows:

1. inputting the volume and density of the sample after starting the device;

2. opening the pump a, and reading the flow value of the flowmeter;

3. reading the value of the hydrogen sulfide sensor, starting calculation when the value is larger than the initial value, instantaneously displaying the value of the hydrogen sulfide sensor, and displaying the final calculated value as a result;

4. when the instantaneous value is larger than 0.95L, the pump b turns on the pump a and turns off the pump b, the display screen displays that the content of the hydrogen sulfide is too high after switching, the value of the hydrogen sulfide sensor is smaller than the initial value and stops until t0, and the sample amount is reduced for retesting;

5. and stopping displaying the test result after the total test time t is measured or the detection value of the hydrogen sulfide sensor is smaller than the initial value to t 0.

And stopping the pump a and stopping the pump b after stopping, and stopping purging after the purging time is reached when the purging time is less than the initial value. When the purging is performed, the display screen displays that purging is performed, the next measurement cannot be started before the purging is completed, and the purging can be stopped.

As shown in fig. 2, the operation steps are performed:

1. installing and connecting pipelines according to instruments;

2. 5ml of base oil meeting the standard requirement is added into the test tube;

3. starting on a point display screen, and popping up a dialog box;

4. taking a certain amount of test oil by using a needle cylinder according to the estimated concentration; the sample is stretched into the liquid level for more than 30mm during sampling;

5. inputting the volume and density of the sample;

6. a sample is driven into the test tube from a test tube interface (namely an oil filling port) to prevent the sample from hanging on the wall and overflowing hydrogen sulfide;

7. after the oil filling port is screwed, point determination is carried out, and analysis is started;

8. the content of hydrogen sulfide in the sample is automatically calculated by an instrument, and the total analysis process is 10min at most;

9. and the analysis completion instrument enters a purging flow and automatically stops after purging.

Claims

1. A portable crude oil liquid phase hydrogen sulfide detection device is characterized by comprising a PLC (programmable logic controller), a display screen, a battery, a drying pipe, a flowmeter, a pump a, a pump b, a test pipe, a liquid trap, a membrane filter, a cylindrical filter, a hydrogen sulfide sensor and an absorption pipe;

2. The portable crude oil liquid phase hydrogen sulfide detection device as recited in claim 1, further comprising an absorption tube interface, a drying tube interface, a test tube interface and a filter interface; the drying pipe interface is connected to a pipeline between the drying pipe and the flowmeter; the test tube interface is connected to a pipeline between the pump a and the test tube; the filter interface is connected to a pipeline between the membrane filter and the cylindrical filter; the absorption tube interface is connected to a pipeline between the hydrogen sulfide sensor and the absorption tube.