CN110579378B - Flue gas continuous sampling probe - Google Patents

Abstract

The invention provides a smoke sustainable sampling probe rod, which comprises a rotary filtering device, a sampling device and a sampling device, wherein the rotary filtering device is provided with a first cavity and a second cavity which are isolated from each other and can reciprocally rotate around a rotary shaft; one of the chambers is communicated with the sample gas inlet, and the other chamber is communicated with the back-blowing gas outlet; the first chamber and the second chamber are respectively provided with a filter disc; the first chamber and the second chamber are also connected with the sampling tube and the blowback tube through the first electromagnetic valve and the second electromagnetic valve respectively. Through the reciprocal rotation of rotatory filter equipment, can make the filter plate of two cavities work in turn and blowback clean, guarantee the continuation of sample gas sampling work and go on, avoid the probe rod to block up, reduce staff working strength.

Description

Flue gas continuous sampling probe

Technical Field

The invention relates to a smoke sampling probe.

Background technique

As people's awareness of environmental protection continues to increase, the domestic monitoring of air pollution, especially the online monitoring of flue gas from major flue gas emitters such as power plants, is increasingly required. In response to national policies and to meet the monitoring needs of incineration exhaust gas, combined with years of engineering experience in environmental monitoring, pollution control, process monitoring and other fields, the existing flue gas sampling device has a sampling probe under special working conditions such as high temperature, high humidity, and high corrosiveness. The probe rod is frequently blocked, and the filter device on the probe rod also needs to be frequently replaced, which seriously increases the work intensity of the staff and wastes resources.

Summary of the invention

Based on the drawbacks of the above-mentioned existing devices, the present invention provides a smoke continuous sampling probe rod to enable continuous sampling.

To achieve the above object, the technical solution adopted by the present invention is:

A flue gas continuous sampling probe, characterized by comprising:

The rod body has a sample gas inlet and a back-blowing gas outlet;

The rotary filter device is located at the sample gas inlet of the rod body, has a first chamber and a second chamber isolated from each other, and can reciprocate between the first position and the second position around a horizontally arranged rotating shaft; when the rotary filter device is located at the first position, the first chamber is connected to the sample gas inlet, and the second chamber is connected to the back-blowing gas outlet; when the rotary filter device is located at the second position, the second chamber is connected to the sample gas inlet, and the first chamber is connected to the back-blowing gas outlet; filter sheets are provided in both the first chamber and the second chamber;

The first solenoid valve is a two-position three-way solenoid valve, one working port of which is connected to the first chamber, and the other two working ports are connected to the sampling tube and the backflush tube respectively;

The second solenoid valve is also a two-position three-way solenoid valve, one working port of which is connected to the second chamber, and the other two working ports are respectively connected to the sampling tube and the backflush tube.

The smoke continuous sampling probe, wherein: the first solenoid valve is connected to the first chamber via a first bendable or stretchable pipeline.

The smoke continuous sampling probe, wherein: the second solenoid valve is connected to the second chamber via a second bendable or stretchable pipeline.

The smoke continuous sampling probe further comprises a sampling backflush controller which is electrically connected to the driving motor, the first solenoid valve and the second solenoid valve respectively.

The continuous flue gas sampling probe, wherein: the sampling tube is connected to the sampling sensor.

The flue gas continuous sampling probe, wherein: the back-blowing pipe is connected with back-blowing high-pressure gas.

The smoke continuous sampling probe rod further comprises a driving motor connected to the rotating shaft and capable of driving the rotating filtering device to rotate reciprocatingly.

Compared with the prior art, the present invention has the following beneficial effects: through the reciprocating rotation of the rotary filter device, the filter plates in the two chambers can work and backwash alternately, ensuring the continuous sampling of the sample gas, avoiding the blockage of the probe rod, and reducing the workload of the staff.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a smoke sustainable sampling probe provided by the present invention;

FIG. 2 is a schematic diagram of the gas path control principle of the smoke sustainable sampling probe provided by the present invention.

Explanation of the reference numerals: rod body 1; sample gas inlet 2; back-blowing gas outlet 3; first chamber 4; second chamber 5; rotating shaft 6; driving motor 7; first solenoid valve 8; first pipeline 9; sampling tube 10; back-blowing tube 11; second solenoid valve 12; second pipeline 13; sampling back-blowing controller 14.

Detailed ways

As shown in FIG. 1 and FIG. 2 , the present invention provides a flue gas sustainable sampling probe, comprising:

The rod body 1 extends into the flue and has a sample gas inlet 2 for the flue gas to enter, and also has a back-blowing gas outlet 3;

The rotary filter device is located at the sample gas inlet 2 of the rod body 1, and has a first chamber 4 and a second chamber 5 isolated from each other, and can reciprocate between the first position and the second position around a horizontally arranged rotating shaft 6; when the rotary filter device is located at the first position, the first chamber 4 is connected to the sample gas inlet 2, and the second chamber 5 is connected to the back-blowing gas outlet 3; when the rotary filter device is located at the second position, the second chamber 5 is connected to the sample gas inlet 2, and the first chamber 4 is connected to the back-blowing gas outlet 3; filter sheets are provided in the first chamber 4 and the second chamber 5;

A driving motor 7 is fixed on the rod body 1 and connected to the rotating shaft 6 to drive the rotating filter device to rotate back and forth. When the rotating motor rotates forward 180 degrees, the rotating filter device can be rotated from the second position to the first position. When the rotating motor rotates reversely 180 degrees, the rotating filter device can be returned from the first position to the second position.

The first solenoid valve 8 is fixed on the rod body 1 and is a two-position three-way solenoid valve, one of which is connected to the first chamber 4 via a bendable or stretchable first pipeline 9, and the other two working ports are connected to a sampling tube 10 and a backflush tube 11 respectively; the sampling tube 10 is connected to a sampling sensor, and the backflush tube 11 is connected to backflush high-pressure gas;

The second solenoid valve 12 is fixed on the rod body 1 and is also a two-position three-way solenoid valve, one working port of which is connected to the second chamber 5 through a bendable or stretchable second pipeline 13, and the other two working ports are connected to the sampling tube 10 and the backflush tube 11 respectively;

The sampling back-blowing controller 14 is fixed on the rod body 1 and is electrically connected to the driving motor 7 , the first solenoid valve 8 and the second solenoid valve 12 respectively to control the flue gas sampling and back-blowing process.

When the present invention is used, the steps are as follows:

The driving motor 7 rotates forward 180 degrees to rotate the rotary filter device from the second position to the first position, the first chamber 4 is connected to the sample gas inlet 2, and the second chamber 5 is connected to the back-blowing gas outlet 3; the first chamber 4 is connected to the sampling tube 10 through the first solenoid valve 8, and the second chamber 5 is connected to the back-blowing tube 11 through the second solenoid valve 12;

At this time, the flue gas passes through the filter of the first chamber 4 from the sample gas inlet 2 and enters the first chamber 4, and then enters the sampling tube 10 through the first solenoid valve 8 to complete the sampling test; and the back-blowing gas passes from the back-blowing tube 11 to the second chamber 5 through the second solenoid valve 12, back-blowing and cleaning the filter in the second chamber 5, and then discharged from the back-blowing gas outlet 3;

After a period of time, in order to prevent the filter in the first chamber 4 from being blocked, the driving motor 7 is reversed 180 degrees, so that the rotary filter device is rotated from the first position to the second position, the second chamber 5 is connected to the sample gas inlet 2, and the first chamber 4 is connected to the back-blowing gas outlet 3; the first solenoid valve 8 and the second solenoid valve 12 are switched, so that the second chamber 5 is connected to the sampling tube 10 through the second solenoid valve 12, and the first chamber 4 is connected to the back-blowing tube 11 through the first solenoid valve 8;

At this time, the flue gas passes through the filter of the second chamber 5 from the sample gas inlet 2 and enters the second chamber 5, and then enters the sampling tube 10 through the second solenoid valve 12 to complete the sampling test; and the back-blowing gas passes from the back-blowing tube 11 through the first solenoid valve 8 to the first chamber 4, back-blowing and cleaning the filter in the first chamber 4, and then discharged from the back-blowing gas outlet 3;

This reciprocating process allows the filters in the two chambers to work and backwash alternately, ensuring the continuous sampling of the sample gas, avoiding clogging of the probe rod, and reducing the workload of the staff.

The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims (7)

1. A flue gas continuous sampling probe, characterized by comprising: The rod body has a sample gas inlet and a back-blowing gas outlet; A rotary filter device is coaxially arranged with the rod body at the sample gas inlet position of the rod body, has a first chamber and a second chamber isolated from each other, and can reciprocate between the first position and the second position around a horizontally arranged rotating shaft, and the rotating shaft is arranged along the axial direction of the rod body; when the rotary filter device is located at the first position, the first chamber is connected to the sample gas inlet, and the second chamber is connected to the back-blowing gas outlet; when the rotary filter device is located at the second position, the second chamber is connected to the sample gas inlet, and the first chamber is connected to the back-blowing gas outlet; filter sheets are provided in both the first chamber and the second chamber; The first solenoid valve is a two-position three-way solenoid valve, one working port of which is connected to the first chamber, and the other two working ports are connected to the sampling tube and the backflush tube respectively; The second solenoid valve is also a two-position three-way solenoid valve, one working port of which is connected to the second chamber, and the other two working ports are respectively connected to the sampling tube and the backflush tube. 2 . The sustainable flue gas sampling probe according to claim 1 , wherein the first solenoid valve is connected to the first chamber via a first bendable or stretchable pipeline. 3 . The sustainable flue gas sampling probe according to claim 1 , wherein the second solenoid valve is connected to the second chamber via a second bendable or stretchable pipeline. 4. The sustainable flue gas sampling probe according to claim 1, characterized in that the sampling tube is connected to a sampling sensor. 5. The flue gas sustainable sampling probe according to claim 1, characterized in that: the back-blowing pipe is connected to back-blowing high-pressure gas. 6. The sustainable flue gas sampling probe according to claim 1 is characterized by comprising a driving motor connected to the rotating shaft and capable of driving the rotating filtering device to rotate reciprocally. 7. The sustainable flue gas sampling probe according to claim 6, characterized in that it also includes a sampling backflush controller, which is electrically connected to the drive motor, the first solenoid valve and the second solenoid valve respectively.