CN212904782U

CN212904782U - Fixed pollution sources VOCs on-line monitoring device

Info

Publication number: CN212904782U
Application number: CN202021846814.4U
Authority: CN
Inventors: 项佳伟
Original assignee: Nantong Qili Environmental Protection Technology Co ltd
Current assignee: Nantong Qili Environmental Protection Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-06
Anticipated expiration: 2030-08-31

Abstract

The utility model relates to a fixed pollution sources VOCs on-line monitoring device, include: the system comprises an acquisition probe, a gas buffer tank, a VOCs detector, an air pump and a filtering device, wherein the acquisition probe is connected with the gas buffer tank, and the gas buffer tank is connected with the VOCs detector; the VOCs detector is connected with the air pump, and the air pump is connected with the filtering device. The utility model has the advantages that the inlet of the sampling pipeline is provided with the filtering device, thereby preventing the particles from entering the device and influencing the accuracy of the test, and also avoiding the aggregation of the particles from influencing the service life of the device; a temperature sensor is arranged at the sampling nozzle, and the temperature of the heat insulation layer of the sampling pipeline can be adjusted through the sensing data of the temperature sensor, so that the inaccurate test caused by the temperature change is avoided; the tested gas is filtered and then exhausted into the air, so that the secondary pollution is avoided.

Description

Fixed pollution sources VOCs on-line monitoring device

Technical Field

The utility model belongs to the technical field of the environmental monitoring technique and specifically relates to a fixed pollution sources VOCs on-line monitoring device is related to.

Background

Volatile Organic Compounds (VOCs) have vapor pressure of more than 0.1 at 25 ℃ under one atmosphere, are complex in composition, have great influence on human health, and are always valued by people.

In the prior art, the sampling is usually carried out in a flue or air directly, but the components are complex and are easily influenced by other components, so that the testing is inaccurate, particularly for granular substances wrapped in the granular substances, the sampling device can be possibly blocked, the monitoring accuracy is influenced, and the service life of sampling testing equipment is shortened; the sampling pipe is too long, and the temperature is reduced too fast when the gas passes through the sampling pipeline, so that the testing precision is influenced; the gas after sampling test is directly discharged into the air, which can cause secondary pollution of the air.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide an online monitoring device for VOCs in a fixed pollution source, wherein a filtering device is arranged at the inlet of a sampling pipeline, so that the accuracy of a test is prevented from being influenced by the entering of particles, and the service life of equipment is also prevented from being influenced by the accumulation of the particles; a temperature sensor is arranged at the sampling nozzle, and the temperature of the heat insulation layer of the sampling pipeline can be adjusted through the sensing data of the temperature sensor, so that the inaccurate test caused by the temperature change is avoided; the tested gas is filtered and then exhausted into the air, so that secondary pollution is avoided.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: an on-line monitoring device for VOCs of fixed pollution sources comprises: the system comprises an acquisition probe, a gas buffer tank, a VOCs detector, an air pump and a filtering device, wherein the acquisition probe is connected with the gas buffer tank, and the gas buffer tank is connected with the VOCs detector; the VOCs detector is connected with the air pump, and the air pump is connected with the filtering device.

By adopting the technical scheme, the filtering device is arranged at the inlet of the sampling pipeline, so that the influence of the entry of particles on the accuracy of the test is prevented, and the influence of the accumulation of the particles on the service life of the equipment is avoided; a temperature sensor is arranged at the sampling nozzle, and the temperature of the heat insulation layer of the sampling pipeline can be adjusted through the sensing data of the temperature sensor, so that the inaccurate test caused by the temperature change is avoided; the tested gas is filtered and then exhausted into the air, so that secondary pollution is avoided.

The utility model discloses further set up to: the collecting probe comprises a sampling pipe, the sampling pipe is connected with the gas buffer box, a sealing cover is arranged at one end of the sampling pipe, which is far away from the gas buffer box, and the sampling pipe is in threaded connection with the sealing cover; one side of the sealing cover, which is far away from the sampling pipe, is provided with a sampling nozzle.

Through adopting above-mentioned technical scheme, but sampling pipe is connected for adopting the formula of writing with sealed lid, and the maintenance of being convenient for is changed, improve equipment life.

The utility model discloses further set up to: the cross section of the sealing cover is cylindrical, an annular groove is formed in the inner wall of the opening of the sealing cover along the circumference, a plurality of springs are arranged at the bottom of the groove, and a sealing ring is arranged at one end, away from the bottom of the groove, of each spring; the inner wall of the groove is provided with threads.

Through adopting above-mentioned technical scheme, structural design is simple, easily makes the use.

The utility model discloses further set up to: the groove is provided with a fastening ring and a filtering membrane in a matching manner, and the fastening ring is in threaded connection with the inner wall of the groove; the filter membrane is arranged between the sealing ring and the fastening ring.

By adopting the technical scheme, the filtering membrane effectively prevents particulate matters from entering; the filtering membrane is pressed tightly by rotating the fastening ring, so that the sealing ring is pressed tightly, the spring is compressed, and the tightness of sealing is ensured; the filtering membrane is easy to replace and install.

The utility model discloses further set up to: and a temperature sensor is arranged on the sampling nozzle.

By adopting the technical scheme, the temperature condition of the collected sample is monitored in real time.

The utility model discloses further set up to: and the outer wall of the sampling pipe is sleeved with a heat insulation layer.

Through adopting above-mentioned technical scheme, according to the temperature condition that temperature sensor gathered, the temperature of control heat preservation to the temperature of the interior gas of control sampling pipe.

The utility model discloses further set up to: and a one-way valve is arranged between the gas buffer tank and the VOCs detector.

By adopting the technical scheme, the design is simple and the realization is easy.

To sum up, the utility model discloses a beneficial technological effect does:

1. a filtering device is arranged at the inlet of the sampling pipeline, so that the influence of the entry of particles on the accuracy of the test is prevented, and the influence of the accumulation of the particles on the service life of the equipment is avoided;

2. a temperature sensor is arranged at the sampling nozzle, and the temperature of the heat insulation layer of the sampling pipeline can be adjusted through the sensing data of the temperature sensor, so that the inaccurate test caused by the temperature change is avoided;

3. the tested gas is filtered and then exhausted into the air, so that secondary pollution is avoided.

Drawings

FIG. 1 is a schematic structural diagram of an on-line monitoring device for VOCs of a fixed pollution source.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.

In the figure, 1, a collecting probe, 11, a sampling pipe, 111, a heat insulation layer, 12, a sealing cover, 121, a groove, 122, a spring, 123, a sealing ring, 124, a fastening ring, 13, a sampling nozzle, 131, a temperature sensor, 2, an air buffer box, 21, a one-way valve, 3, a VOCs detector, 4, an air pump, 5 and a filtering device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, do the utility model discloses a fixed pollution sources VOCs on-line monitoring device, include: the device comprises an acquisition probe 1, a gas buffer tank 2, a VOCs detector 3, an air pump 4 and a filtering device 5, wherein the acquisition probe 1 is connected with the gas buffer tank 2, and the gas buffer tank 2 is connected with the VOCs detector 3; the VOCs detector 3 is connected with an air pump 4, and the air pump 4 is connected with a filtering device 5. The collecting probe 1 comprises a sampling pipe 11, the sampling pipe 11 is connected with the gas buffer box 2, a sealing cover 12 is arranged at one end of the sampling pipe 11, which is far away from the gas buffer box 2, and the sampling pipe 11 is in threaded connection with the sealing cover 12; the side of the sealing cover 12 far away from the sampling pipe 11 is provided with a sampling nozzle 13. The section of the sealing cover 12 is cylindrical, an annular groove 121 is formed in the inner wall of the opening of the sealing cover 12 along the circumference, a plurality of springs 122 are arranged at the bottom of the groove 121, and a sealing ring 123 is arranged at one end, away from the bottom of the groove 121, of each spring 122; the inner wall of the groove 121 is provided with threads. A fastening ring 124 and a filtering membrane 125 are arranged on the groove 121 in a matching manner, and the fastening ring 124 is in threaded connection with the inner wall of the groove 121; the filter membrane 125 is arranged between the sealing ring 123 and the fastening ring 124. The sampling nozzle 13 is provided with a temperature sensor 131. And an insulating layer 111 is sleeved on the outer wall of the sampling pipe 11. A check valve 21 is arranged between the gas buffer tank 2 and the VOCs detector 3.

The implementation principle of the embodiment is as follows: extending the sampling nozzle 13 into a flue or a gas to be sampled, starting the air pump 4, and sucking gas through the sampling nozzle 13; the gas passes through the filter membrane 125, and the particulate pollutants are filtered and prevented from entering the sampling pipe 11; controlling the temperature of the insulating layer 111 according to the temperature of the gas sensed by the temperature sensor 131, and further controlling the temperature of the gas flowing in the sampling pipe 11 to be always the same as the temperature during sampling; then, the gas enters the gas buffer box 2, so that the influence of overlarge gas suction flow rate or nonuniform flow rate on the detection accuracy is avoided; the gas in the gas buffer tank 2 enters the VOCs detector 3 through the one-way valve 21 for testing to obtain test data; the tested tail gas is discharged into the air through the filtration of the air pump 4 and the filtering device 5.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An on-line monitoring device for VOCs of fixed pollution sources comprises: acquisition probe (1), gas buffer tank (2), VOCs detector (3), air pump (4), filter equipment (5), its characterized in that: the acquisition probe (1) is connected with a gas buffer tank (2), and the gas buffer tank (2) is connected with a VOCs detector (3); the VOCs detector (3) is connected with the air pump (4), and the air pump (4) is connected with the filtering device (5).

2. The fixed pollution source VOCs online monitoring device according to claim 1, wherein the acquisition probe (1) comprises a sampling pipe (11), the sampling pipe (11) is connected with the gas buffer tank (2), a sealing cover (12) is arranged at one end of the sampling pipe (11) far away from the gas buffer tank (2), and the sampling pipe (11) is in threaded connection with the sealing cover (12); one side of the sealing cover (12) far away from the sampling pipe (11) is provided with a sampling nozzle (13).

3. The fixed pollution source VOCs online monitoring device according to claim 2, wherein the sealing cover (12) is cylindrical in cross section, an annular groove (121) is circumferentially arranged on the inner wall of the opening of the sealing cover (12), a plurality of springs (122) are arranged at the bottom of the groove (121), and a sealing ring (123) is arranged at one end of each spring (122) far away from the bottom of the groove (121); the inner wall of the groove (121) is provided with threads.

4. The fixed pollution source VOCs online monitoring device according to claim 3, wherein a fastening ring (124) and a filtering membrane (125) are arranged on the groove (121) in a matching manner, and the fastening ring (124) is in threaded connection with the inner wall of the groove (121); the filter membrane (125) is arranged between the sealing ring (123) and the fastening ring (124).

5. The device for on-line monitoring of fixed pollution sources VOCs according to claim 2, wherein a temperature sensor (131) is arranged on the sampling nozzle (13).

6. The on-line monitoring device for the fixed pollution sources VOCs according to claim 2, wherein an insulating layer (111) is sleeved on the outer wall of the sampling pipe (11).

7. The on-line monitoring device for VOCs of the fixed pollution source according to claim 1, wherein a check valve (21) is arranged between the gas buffer tank (2) and the VOCs detector (3).