CN212459063U

CN212459063U - Heating sampling probe and low-concentration flue gas dust instrument

Info

Publication number: CN212459063U
Application number: CN202021161951.4U
Authority: CN
Inventors: 贾海森; 王永红
Original assignee: China Electric Industry Technology Development Co ltd
Current assignee: China Electric Industry Technology Development Co ltd
Priority date: 2020-06-20
Filing date: 2020-06-20
Publication date: 2021-02-02
Anticipated expiration: 2030-06-20

Abstract

The utility model relates to a heating sampling probe, which comprises a sampling probe, a reflux heating cavity connected with the sampling probe and a detection cavity connected with the reflux heating cavity; a first pipeline is arranged in the backflow heating chamber, one end of the first pipeline is connected with a sampling probe, an electric heating wire is connected to the position, close to the sampling probe, of the first pipeline, the electric heating wire is connected with a power supply, and a backflow pipeline is arranged outside the first pipeline; the first pipeline other end is connected with the second pipeline, the second pipeline sets up in detecting the cavity, the outside intercommunication of second pipeline is provided with detection device, the second pipeline other end is connected with the backflow pipeline. The utility model can prevent the condensation caused by low temperature of the sample gas in the system, and ensure that the pipeline can not be blocked, so that the utility model can be normally used; and residual heat of the gas after detection is finished is utilized, so that energy is saved, and the national energy-saving and emission-reducing policy is responded.

Description

Heating sampling probe and low-concentration flue gas dust instrument

Technical Field

The utility model belongs to the technical field of flue gas dust treatment's technique and specifically relates to a heating sampling probe and low concentration flue gas dust appearance are related to.

Background

In the power industry, coal-fired power generation can generate a large amount of combustion products, wherein gases such as CO, SO2, SO3 and NOX are harmful to ecological environment and human bodies; in the operation process of the boiler, in order to know gas parameters in a flue, a sampling probe is mostly adopted to extend into the flue for flue gas collection, most of flue gas dust contains water, and the water in the flue gas can influence the inspection result, so that most of the existing sampling devices are added with a heating device to remove the water in the flue gas, and the detected gas result is filtered and directly removed.

The above prior art solutions have the following drawbacks: residual heat of the detected gas is not fully utilized, national resources are wasted, and no response to national policies of energy conservation and emission reduction is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heating sampling probe and low concentration flue gas dust appearance, prevent in the system because of sample gas low temperature dewfall, utilize the remaining heat that detects accomplish the back gas simultaneously, practiced thrift the energy, responded national energy saving and emission reduction policy.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a heating sampling probe, characterized by: the device comprises a sampling probe, a reflux heating chamber connected to the sampling probe and a detection chamber connected to the reflux heating chamber;

a first pipeline is arranged in the backflow heating chamber, one end of the first pipeline is connected with a sampling probe, an electric heating wire is connected to the position, close to the sampling probe, of the first pipeline, the electric heating wire is connected with a power supply, and a backflow pipeline is arranged outside the first pipeline;

the first pipeline other end is connected with the second pipeline, the second pipeline sets up in detecting the cavity, the outside intercommunication of second pipeline is provided with detection device, the second pipeline other end is connected with the backflow pipeline.

By adopting the technical scheme, the second pipeline in the detection chamber is connected with the electric heating wire, the electric heating wire is connected with the power supply, and the dew condensation caused by low temperature of the sample gas in the system is prevented by electric heating, so that the pipeline is prevented from being blocked, and the utility model can be normally used; the detected gas is discharged into the backflow pipeline and enters the backflow heating chamber from the backflow pipeline, the residual heat of the detected gas is utilized, the energy is saved, and the national energy conservation and emission reduction policy is responded.

The present invention may be further configured in a preferred embodiment as: and the outer walls of the reflux heating chamber and the detection chamber are provided with a heat insulation layer.

By adopting the technical scheme, on one hand, the dew condensation caused by low temperature of the sample gas in the system is prevented, and the detection result is more accurate; on the other hand, the heat loss in the reflux heating cavity and the detection cavity is prevented, so that the gas heat in the reflux pipeline is fully utilized.

The present invention may be further configured in a preferred embodiment as: the heat insulation layer is a nano micropore heat insulation felt material layer.

By adopting the technical scheme, the material layer is the high-temperature heat insulation material layer with the best heat insulation performance in the world at present, and the heat insulation performance of the material layer is 3-4 times better than that of the traditional fiber heat insulation materials.

The present invention may be further configured in a preferred embodiment as: and the heat insulation layers outside the reflux heating cavity and the detection cavity are coated with one protective layer.

By adopting the technical scheme, on one hand, the heat insulation layer is protected from being damaged, and on the other hand, the heat insulation layer is prevented from being watered to influence the performance of the heat insulation layer.

The present invention may be further configured in a preferred embodiment as: the protective layer is a polyvinyl chloride (PVC) material layer.

By adopting the technical scheme, the polyvinyl chloride PVC material layer has good waterproof performance and better corrosion resistance, and can prevent the reflux heating chamber and the detection chamber from being corroded in the using process.

The present invention may be further configured in a preferred embodiment as: and the outer wall of the second pipeline is connected with a temperature sensor.

Through adopting above-mentioned technical scheme, measurement that can be accurate before the inspection flue gas temperature to judge whether to lead to the dewfall because of low temperature in the flue gas, prevent the pipeline jam.

The present invention may be further configured in a preferred embodiment as: the sampling probe is provided with at least two sampling holes.

Through adopting above-mentioned technical scheme, through set up a plurality of sampling holes on the sampling probe, make the flue gas can follow all directions and get into the sampling probe to it is more convenient to make the flue gas detect.

The present invention may be further configured in a preferred embodiment as: a low-concentration flue gas dust instrument comprises a heating sampling probe, a detection device, a filtering device and an exhaust device.

By adopting the technical scheme, the detection device can detect CO, SO2, SO3, NOX and other gases which are harmful to human bodies in the flue gas; the filtering device can remove gas which is harmful to human body in the smoke, and the smoke passing through the filtering device meets the national emission standard; the exhaust device can exhaust the filtered smoke.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the first pipeline in the detection chamber of the utility model is connected with the electric heating wire, which ensures that the water vapor in the smoke is removed before the detection, and the detection result is more accurate; the detected gas is discharged into a backflow pipeline and enters a backflow heating chamber from the backflow pipeline, the residual heat of the detected gas is utilized, the energy is saved, and the national energy-saving and emission-reducing policy is responded;

2. the utility model discloses in through set up a plurality of sampling holes on sampling probe, make the flue gas can follow all directions and get into sampling probe to it is more convenient to make the flue gas detect.

Drawings

Fig. 1 is a schematic view of the overall connection structure of the present invention.

In the figure, 1, a sampling probe, 2, a reflux heating chamber, 3, a detection chamber, 4, a first pipeline, 5, a second pipeline, 6, a reflux pipeline, 7, an electric heating wire, 8, a temperature sensor, 9, a detection device, 10, a heat insulation layer, 11, a protective layer, 12 and a sampling hole.

Detailed Description

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

Referring to fig. 1, for the utility model discloses a heating sampling probe, visit including the sampling, 1, backflow heating cavity 2 and detection cavity 3, sampling probe 1's shape is the tubulose, and four sampling holes 12 have been seted up in sampling probe 1 left side, make the flue gas can follow all directions and get into sampling probe 1 to it is more convenient to make the flue gas detect.

Referring to fig. 1, the right end face of a sampling probe 1 is connected with a first pipeline 4 in a reflux heating chamber 2, the first pipeline 4 is tubular, the left side of the first pipeline 4 is connected with an electric heating wire 7, the electric heating wire 7 is connected with a power supply, and the electric heating wire 7 is used for heating to prevent condensation caused by low temperature of smoke in a system and ensure that the pipeline is not blocked; 4 right-hand member face of first pipeline is connected with the second pipeline 5 that detects

cavity

3, 5 shapes of second pipeline are the tubulose, detection device 9 is installed on 5 outer wall right sides of second pipeline, set up the gas pocket that lets in detection device on the second pipeline, install the fan in the detection device 9, can detect CO in the flue gas through detection device 9, SO2, the great gas of harm to the human body such as SO3 and NOX, the fan that can be simultaneously in the detection device 9 is blowd in and is waited to detect the flue gas and blow out the flue gas that has detected.

Referring to fig. 1, temperature-sensing appearance 8 is installed on second pipeline 5 outer wall left side, and the temperature before the inspection can be accurate to judge whether there is the vapor to remove in the flue gas, make the testing result more accurate.

Referring to fig. 1, the right side of the second pipeline 5 is connected with a return pipe 6, the return pipe 6 is in an L-shaped tubular shape, the return pipe 6 penetrates through the left side wall of the detection chamber 3 and the right side wall of the return heating chamber 2 and is parallel to the first pipeline, detected gas is discharged into the return pipe 6 and enters the return heating chamber 2 from the return pipe 6, residual heat of the detected gas is utilized, energy is saved, and the national energy conservation and emission reduction policy is responded.

Referring to fig. 1, the outer walls of the reflux heating chamber 2 and the detection chamber 3 are respectively provided with a layer of heat insulation layer 10, so that on one hand, condensation caused by low temperature of sample gas in the system is prevented, and the detection result is more accurate; on the other hand, the heat loss in the reflux heating chamber 2 and the detection chamber 3 is prevented, so that the heat of the gas in the reflux pipeline 6 is fully utilized; the heat insulation layer 10 is a nano micropore heat insulation felt material layer which is a high temperature heat insulation material layer with the best heat insulation performance in the world at present, and the heat insulation performance of the material layer is 3-4 times better than that of a traditional fiber heat insulation material.

Referring to fig. 1, a protective layer 11 is coated outside the heat insulation layer 10 outside the reflux heating chamber 2 and the detection chamber 3, so that the heat insulation layer is protected from being damaged, and the heat insulation layer is prevented from water entering to influence the performance of the heat insulation layer; the protective layer 11 is made of a polyvinyl chloride PVC material layer which has good waterproof performance and good corrosion resistance, and can prevent the reflux heating chamber and the detection chamber from being corroded in the using process.

Referring to fig. 1, the backflow pipeline 6 passes through the left side wall of the backflow heating chamber 2 and is connected with a filtering device, the filtering device can remove gas which is harmful to human bodies in the flue gas, and the flue gas passing through the filtering device meets the national emission standard; the other end of the filter device is connected with an exhaust device which can exhaust the filtered smoke.

The implementation principle of the embodiment is as follows: referring to fig. 1, smoke to be detected enters a sampling probe 1 from a sampling hole 12, the smoke to be detected is blown into a first pipeline 4 in a backflow heating chamber 2 and a second pipeline 5 in a detection device 3 in sequence by a fan in the detection device 9, after entering the first pipeline 4, the smoke to be detected is heated by an electric heating wire 7 to prevent condensation caused by low temperature of the smoke in the system, then the smoke temperature before detection is accurately measured by a temperature sensor 8, SO that condensation caused by low temperature in the pipeline is ensured, gas coming out of the temperature sensor 8 is blown into the detection device 9 by the fan in the detection device 9, the detection device 9 detects gas which is harmful to human bodies, such as CO, SO2, SO3 and NOX, in the smoke to be detected, then the fan blows the detected smoke out of the detection device 9 and enters a backflow pipeline 6, the detected smoke enters the backflow heating chamber 2 through the backflow pipeline 6, therefore, the temperature of the backflow chamber 2 is increased, the temperature of the to-be-detected flue gas in the first pipeline 4 is further increased, the electric energy consumed during heating is reduced, the energy is saved, and the national energy conservation and emission reduction policy is responded; meanwhile, the outer walls of the reflux heating chamber 2 and the detection chamber 3 are both provided with a layer of heat insulation layer 10, so that on one hand, the condensation caused by low temperature of sample gas in the system is prevented, and the detection result is more accurate; on the other hand, the heat loss in the reflux heating chamber 2 and the detection chamber 3 is prevented, so that the heat of the gas in the reflux pipeline 6 is fully utilized.

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. A heating sampling probe, characterized by: comprises a sampling probe (1), a reflux heating chamber (2) connected with the sampling probe (1) and a detection chamber (3) connected with the reflux heating chamber (2);

a first pipeline is arranged in the backflow heating chamber, one end of the first pipeline (4) is connected with a sampling probe (1), the first pipeline (4) close to the sampling probe (1) is connected with an electric heating wire (7), the electric heating wire (7) is connected with a power supply, and a backflow pipeline (6) is arranged outside the first pipeline (4);

the other end of the first pipeline (4) is connected with a second pipeline (5), the second pipeline (5) is arranged in the detection chamber (3), the outside of the second pipeline (5) is communicated with a detection device (9), and the other end of the second pipeline (5) is connected with a return pipeline (6).

2. A heated sampling probe according to claim 1 wherein: and a layer of heat insulation layer (10) is arranged on the outer walls of the reflux heating chamber (2) and the detection chamber (3).

3. A heated sampling probe according to claim 2 wherein: the heat insulation layer (10) is a nano micropore heat insulation felt material layer.

4. A heated sampling probe according to claim 2 wherein: and the heat insulation layers (10) outside the reflux heating chamber (2) and the detection chamber (3) are coated with a protective layer (11).

5. A heated sampling probe according to claim 4 wherein: the protective layer (11) is arranged to be a polyvinyl chloride PVC material layer.

6. A heated sampling probe according to claim 1 wherein: and a temperature sensor (8) is connected to the outer wall of the second pipeline (5).

7. A heated sampling probe according to claim 1 wherein: the sampling probe (1) is provided with at least two sampling holes (12).

8. The utility model provides a low concentration flue gas dust appearance which characterized in that: comprising a heated sampling probe according to any of claims 1 to 7, a detection device (9), a filter device and an exhaust device.