CN220270921U - Sampling device - Google Patents

Abstract

The utility model relates to a sampling device which is used for being connected to a pipeline between an outlet of a draught fan and a desulfurization absorption tower, and comprises a sampling pipe assembly and a pressure transmitter, wherein the sampling pipe assembly comprises a pipe body, the pipe body is provided with a first pipe orifice and a second pipe orifice which are opposite along the self extending direction, the first pipe orifice is communicated with the pipeline, and the inner diameter of the first pipe orifice is larger than that of the second pipe orifice; the pressure transmitter is connected to the second nozzle. The sampling device can reduce the blockage of sulfur dioxide in the flue gas and corrode the pipe body.

Description

Sampling device

Technical Field

The present disclosure relates to the field of pressure detection technology, and in particular, to a sampling device.

Background

A pressure measuring point is usually arranged on a pipeline between an outlet of the induced draft fan and the desulfurization absorption tower to detect the outlet pressure of the induced draft fan, for example, in the related art, a sampling pipe is usually additionally arranged on the pipeline, and a pressure transmitter is usually arranged on the sampling pipe. In winter, when the temperature is lower, the sampling tube is often blocked, and the sampling tube is blocked after a few days after dredging, because the flue gas outlet of the induced draft fan is positioned in front of the desulfurizing tower, sulfur dioxide is contained in the flue gas, corrosion can be caused to the surface tube, the accumulation of impurities after corrosion can cause the blocking of the sampling tube, especially the interface of the sampling tube and a pipeline, and under the condition of lower temperature, condensed flue gas can form liquid, the corrosion can be aggravated, so that the blocking problem is aggravated, and the measured pressure is inaccurate.

Disclosure of Invention

It is an object of the present disclosure to provide a sampling device that enters a flue gas into a pipe body through a first pipe orifice having a larger inner diameter, which can reduce the blockage and corrosion of sulfur dioxide in the flue gas at the first pipe orifice to at least partially solve the above-mentioned technical problems.

To achieve the above object, the present disclosure provides a sampling device for connecting to a pipe between an outlet of an induced draft fan and a desulfurization absorption tower, the sampling device comprising: the sampling tube assembly comprises a tube body, wherein the tube body is provided with a first tube opening and a second tube opening which are opposite along the self extending direction, the first tube opening is communicated with the pipeline, and the inner diameter of the first tube opening is larger than that of the second tube opening; and a pressure transmitter coupled to the second nozzle.

Optionally, the tube body has a central axis parallel to its own extending direction, the central axis being a straight line.

Optionally, the sampling tube assembly further comprises a heat preservation mechanism sleeved on the tube body.

Optionally, the sampling tube assembly further comprises a heating mechanism at least partially located within the insulating mechanism or at least partially located between the insulating mechanism and the tube body.

Optionally, the heat preservation mechanism includes from inside to outside cup joints at least two-layer heat preservation on the body in proper order, the heating mechanism includes heater strip or heating pipe, heater strip or heating pipe extend to arbitrary adjacent two-layer between the heat preservation, perhaps, heater strip or heating pipe extend to the body with between the heat preservation that the body is adjacent.

Optionally, the sampling tube assembly further comprises a metal protection layer sleeved on the heat preservation mechanism.

Optionally, the metal shielding layer is configured as an aluminum skin.

Optionally, a distance between the first nozzle and the second nozzle on a central axis along the tube body is 800mm.

Optionally, the caliber of the first pipe orifice is 50mm.

Optionally, a control valve is arranged on the pipe body.

Through above-mentioned technical scheme, the sampling device that this disclosure provided promptly, the flue gas in the pipeline between the export of draught fan and the desulfurization absorption tower can flow to pressure transmitter department through the body to monitor the pressure of draught fan export exhaust flue gas. Wherein, the inside diameter of first mouth of pipe is greater than the inside diameter of second mouth of pipe, when sampling tube subassembly is to taking a sample, can let more flue gas get into the body through first mouth of pipe to in the accuracy of measurement is improved. Meanwhile, the inner diameter of the first pipe orifice is increased, so that the condensed flue gas can be prevented from accumulating and adhering to the first pipe orifice to corrode a pipe body or a pipeline, and the blocking condition is reduced.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic block diagram of a sampling device provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic illustration of a portion of the structure of a coupon assembly provided in an exemplary embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a coupon assembly provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-a sampling tube assembly; 110-a tube body; 111-a first nozzle; 112-a second nozzle; 120-a heat preservation mechanism; 130-a heating mechanism; 140-a metal protective layer; 2-a pressure transmitter; 3-pipeline.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, directional terms such as "inner and outer" refer to inner and outer relative to the contours of a component or structure itself, and "first, second", etc. are used to distinguish one element from another without sequential or importance, and furthermore, the same reference numerals in different reference figures denote the same elements.

The present disclosure provides a sampling device for connection to a pipe 3 between an outlet of an induced draft fan and a desulfurization absorption tower, as shown with reference to fig. 1 to 3, the sampling device comprising a sampling tube assembly 1 and a pressure transmitter 2, the sampling tube assembly 1 comprising a tube body 110, the tube body 110 having a first pipe orifice 111 and a second pipe orifice 112 opposite to each other in a direction of extension thereof, the first pipe orifice 111 being in communication with the pipe 3, an inner diameter of the first pipe orifice 111 being larger than an inner diameter of the second pipe orifice 112; the pressure transmitter is coupled to the second orifice 112.

In the above manner, the flue gas in the pipeline 3 between the outlet of the induced draft fan and the desulfurization absorption tower can flow to the pressure transmitter 2 through the pipe body 110 so as to monitor the pressure of the flue gas discharged from the outlet of the induced draft fan. Wherein, the inner diameter of the first pipe orifice 111 is larger than that of the second pipe orifice 112, so that more flue gas can enter the pipe body 110 through the first pipe orifice 111 when the sampling pipe assembly 1 is used for sampling, thereby improving the accuracy of measurement. At the same time, the inner diameter of the first nozzle 111 is increased, so that the condensed smoke is prevented from accumulating and adhering to the first nozzle 111 to corrode the pipe body 110 or the pipe 3, thereby reducing the clogging.

In addition, the tube body 110 may have any suitable tube structure having an inner diameter difference between the first tube opening 111 and the second tube opening 112, for example, the tube body 110 may be a tapered tube having a stronger toughness and bending resistance effect, in which the inner diameter of the first tube opening 111 is gradually reduced toward the second tube opening 112, or the inner diameter of the tube body 110 may be stepwise reduced from the first tube opening 111 to the second tube opening 112, for example, the tube body 110 may be formed by connecting a plurality of straight tubes having gradually reduced inner diameters in series, which is not limited in the present disclosure.

In addition, the flue gas between the induced draft fan and the desulfurization absorption tower contains sulfur dioxide and moisture, and in the process of flue gas circulation, the sulfur dioxide and the moisture synthesize acidic substances such as sulfurous acid, and the inner wall of the pipe body 110 is made of metal, for example, the pipe body 110 can be made of iron materials, in this case, sulfurous acid is easy to react with iron on the inner wall of the pipe body 110, and generated ferrous ions can form waste residues in the pipe body 110 to block the first pipe orifice 111, so that the inner diameter of the first pipe orifice 111 is enlarged, the waste residues can be prevented from being blocked at the first pipe orifice 111, and the number of manual dredging times of the pipeline 3 is reduced.

In some embodiments, referring to fig. 1 to 3, the pipe body 110 has a central axis parallel to the extending direction thereof, which is a straight line, so that the pipe body 110 can extend along the straight line, thereby preventing the pipe from being bent, and thus preventing corrosion blockage from occurring at the bent portion of the pipe. Wherein the tube body 110 may be a conical tube having a central axis. In addition, when the sampling device is used, the pipe body 110 can be extended in the vertical direction, and the second pipe orifice 112 is positioned above the first pipe orifice 111, so that condensed flue gas can flow back into the pipeline 3 under the action of gravity, and corrosion to the pipe body 110 is reduced.

In some embodiments, referring to FIGS. 1-3, the coupon assembly 1 further comprises a thermal insulation mechanism 120 that is sleeved over the tube body 110. In this way, the heat preservation mechanism 120 can preserve heat of the flue gas in the pipe body 110, can prevent the flue gas from condensing in the process of flowing from the first pipe orifice 111 to the second pipe orifice 112, and because the condensed liquid in the pipe body 110 can aggravate the corrosion action on the pipe body 110, the heat preservation mechanism 120 can prevent the flue gas from condensing when flowing in the pipe body 110, and then can reduce the corrosion action of the flue gas on the pipe body 110, and prolong the service life of the pipe body 110.

It should be noted that, in the present disclosure, the heat preservation mechanism 120 may be any suitable structure, for example, the heat preservation mechanism 120 may be a heat insulation board or heat preservation cotton sleeved on the outer wall of the pipe body 110, which is not limited in this disclosure.

In some embodiments, referring to FIGS. 2 and 3, the coupon assembly 1 further comprises a heating mechanism 130, the heating mechanism 130 being at least partially located within the insulating mechanism 120, or the heating mechanism 130 being at least partially located between the insulating mechanism 120 and the tube body 110. In this way, when the heating mechanism 130 is at least partially located in the heat preservation mechanism 120, the heat preservation mechanism 120 can be heated, so that the heat preservation effect of the heat preservation mechanism 120 is indirectly improved, and the flue gas can be prevented from condensing in the pipe body 110; when the heating mechanism 130 is at least partially located between the heat preservation mechanism 120 and the pipe body 110, the heating mechanism 130 can heat the smoke flowing in the pipe body 110 to prevent smoke condensation, and can also heat the heat preservation mechanism 120, when the temperature is low in winter, a small part of external cold air can pass through the heat preservation mechanism 120 to reduce the temperature of the pipe body 110, and then condense the smoke, the heating mechanism 130 can increase the temperature of the heat preservation mechanism 120, and can block the external cold air outside the heat preservation mechanism 120 to achieve the effect of preventing smoke condensation.

In other embodiments, the heating mechanism 130 may be configured in any suitable structure, for example, the heating mechanism 130 may be an electric tracing device for freeze protection of pipes, or the like.

In some embodiments, referring to fig. 2 and 3, the heat preservation mechanism 120 includes at least two heat preservation layers sequentially sleeved on the pipe body 110 from inside to outside, the heating mechanism 130 includes a heating wire or a heating pipe, and the heating wire or the heating pipe extends between any two adjacent heat preservation layers, or the heating wire or the heating pipe extends between the pipe body 110 and a heat preservation layer adjacent to the pipe body 110. Through this kind of mode, at least two-layer heat preservation can further improve the heat preservation effect to the interior flue gas of body 110, can further prevent that the flue gas from taking place the condensation at body 110, when heater strip or heating pipe between arbitrary adjacent two-layer heat preservation, can heat the heat preservation of its inside and outside both sides simultaneously, improves the heat preservation effect, and when heater strip or heating pipe between body 110 and the heat preservation adjacent with body 110, heater strip or heating pipe can directly heat body 110 and one deck heat preservation, also can prevent that the flue gas from taking place the condensation in body 110. Referring to fig. 3, a plurality of heating wires or heating pipes may be circumferentially arranged around the pipe body 110 at intervals, so that the plurality of heating wires or heating pipes may jointly heat the pipe body 110, and the temperature difference of the flue gas at different positions in the pipe body 110 may be reduced under the heating effect of the plurality of heating wires or heating pipes, so that when the flue gas reaches the second pipe orifice 112 and is detected by the pressure transmitter 2, the difference of pressure caused by different temperatures may be reduced, and measurement errors may be reduced.

In some embodiments, referring to FIGS. 2 and 3, the coupon assembly 1 further includes a metallic shield 140 that is sleeved over the insulating mechanism 120. Through the metal protection layer 140 that sets up, can prevent that the outside sharp object fish tail sampling device's of sampling device heat preservation mechanism 120, heating mechanism 130 or body 110, the effect that can play the protection to whole sampling device, simultaneously, metal protection layer 140 can also play the heat preservation effect to the flue gas in body 110 to a certain extent, can further prevent that the flue gas from arriving second mouth of pipe 112 department and taking place the condensation.

Although not specifically described, the material of the metal shielding layer 140 may be any suitable metal according to actual needs, for example, the metal shielding layer 140 may be made of metal materials such as iron, copper, aluminum, and alloys.

In some embodiments, referring to fig. 2 and 3, the metal shielding layer 140 is configured as an aluminum skin. The aluminum skin has the advantages of small density, light weight, strong plasticity, corrosion resistance and low manufacturing cost, when the aluminum skin is sheathed on the heat preservation mechanism 120, the whole weight of the sampling tube assembly 1 can be maximally reduced, the aluminum skin has a certain oxidation resistance, after long-time use, the aluminum skin can be oxidized into aluminum oxide, the aluminum oxide is a compact protective film, can be attached to the surface of the aluminum skin, further prevents oxidation reaction between aluminum and the outside, can better protect the inner tube body 110, the heat preservation mechanism 120 and the heating mechanism 130, has higher melting point, can not be burnt by flame even under the condition of fire, can prevent serious accidents caused by contact of smoke and fire, and improves the safety performance of the whole sampling device in the use process.

In some embodiments, referring to fig. 1, the distance between the first nozzle 111 and the second nozzle 112 on the central axis along the tube body 110 is 800mm. In this way, the length distance between the first pipe orifice 111 and the second pipe orifice 112 is shortened to 800mm from the length of 20m of the existing sampling pipe, so that the temperature difference between the first pipe orifice 111 and the second pipe orifice 112 of the flue can be reduced, the flue gas in the pipe body 110 can be further prevented from condensing after reaching the second pipe orifice 112, and the occurrence of dewing and blocking can be prevented.

In some embodiments, as shown with reference to fig. 1-3, the first orifice 111 has a caliber of 50mm. In this way, the caliber of the first pipe orifice 111 is increased from 10mm or 20mm to 50mm, and more flue gas can enter the pipe body 110 through the first pipe orifice 111, so that the first pipe orifice 111 can be prevented from being blocked by waste residues generated by the corrosion of the pipe body 110 by the flue gas.

In some embodiments, a control valve (not shown) is provided on the tube 110. In this way, when the sampling device is not needed to detect the pressure of the flue gas in the pipeline 3, or when the pressure transmitter is maintained and replaced, the control valve on the pipe body 110 can be manually closed, so that the flue gas cannot enter the pipe body 110, the corrosion of substances such as sulfur dioxide in the flue gas to the pipe body 110 can be reduced, or the flue gas is prevented from being discharged to the atmosphere from the pipe body 110. Further, the control valve may be, for example, a solenoid valve or a manual valve, or the like. The connection manner of the control valve and the pipe body 110 may be any suitable manner, for example, when the pipe body 110 includes a plurality of straight pipes with gradually reduced inner diameters, the control valve may be directly connected at the connection position between any two adjacent straight pipes, wherein the diameter at the interface end of the two straight pipes connected with the control valve may be changed to adapt to the interface size of the control valve, or the interface size of the control valve may be changed; while the control valve is connected to the pipe body 110 configured as a tapered pipe, the tapered pipe may be divided into two sections to be connected to two ports of the control valve, respectively, which is not particularly limited in the present disclosure.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A sampling device for connection to a conduit between an outlet of an induced draft fan and a desulfurization absorber, the sampling device comprising:

the sampling tube assembly comprises a tube body, wherein the tube body is provided with a first tube opening and a second tube opening which are opposite along the self extending direction, the first tube opening is communicated with the pipeline, and the inner diameter of the first tube opening is larger than that of the second tube opening; and

and the pressure transmitter is connected with the second pipe orifice.

2. The sampling device of claim 1, wherein the tube has a central axis parallel to its direction of extension, the central axis being a straight line.

3. The sampling device of claim 1, wherein the sampling tube assembly further comprises a thermal insulation mechanism sleeved on the tube body.

4. The sampling device of claim 3, wherein said sampling tube assembly further comprises a heating mechanism at least partially within said insulating mechanism or at least partially between said insulating mechanism and said tube body.

5. The sampling device of claim 4, wherein the thermal insulation mechanism comprises at least two thermal insulation layers sleeved on the pipe body from inside to outside in sequence, the heating mechanism comprises a heating wire or a heating pipe, and the heating wire or the heating pipe extends between any two adjacent thermal insulation layers, or the heating wire or the heating pipe extends between the pipe body and the thermal insulation layer adjacent to the pipe body.

6. The sampling device of claim 3, wherein the coupon assembly further comprises a metallic shield that is sleeved over the insulating mechanism.

7. The sampling device of claim 6, wherein the metallic protective layer is configured as an aluminum skin.

8. The sampling device of claim 1, wherein a distance between the first nozzle and the second nozzle along a central axis of the tube body is 800mm.

9. The sampling device of claim 1, wherein the first orifice has a bore of 50mm.

10. The sampling device of claim 1, wherein a control valve is disposed on the tube.