CN210425540U - Flue gas heating type pipeline - Google Patents

Abstract

The utility model discloses a flue gas adds fever type pipeline. Including the sampling pipe, the sampling pipe outside is equipped with first wire casing and a plurality of second wire casing, and sampling pipe outside parcel has the heat-conducting layer, and the heat-conducting layer is coiled by the tin foil and is formed, and the heat-conducting layer outside in the first wire casing is equipped with a power cord respectively, and the heat-conducting layer outside in the second wire casing is equipped with a heater strip, the both ends of heater strip are connected with two power cords respectively, the heat-conducting layer outside is equipped with the inner cladding, the inner cladding outside is equipped with insulating layer and surrounding layer in proper order. The utility model discloses a set up first wire casing and a plurality of second wire casing in the sampling pipe outside, set up power cord and heater strip respectively in first wire casing and a plurality of second wire casing, the slippage is difficult for appearing, unnecessary heating wire directly exposes in the outside when the construction, is convenient for cut, twines the tinfoil paper at the sampling pipe and forms the heat-conducting layer to set up a plurality of heater strips parallel slope, and then realize that the heating is even and improve heating efficiency, and do not influence the pliability of pipeline.

Description

Flue gas heating type pipeline

Technical Field

The utility model relates to a flue gas heating field, concretely relates to flue gas adds fever type pipeline.

Background

In some plants such as power plants or steel plants which need to discharge the moistening gas, the process treatment such as desulfurization and denitrification is generally needed, and the discharge is allowed after the environmental protection requirement is met. Whether accord with the environmental protection requirement, rely on gas composition detection device to carry out the analysis and measurement, like this, just need extract the flue gas and carry to gas composition detection device in, because the flue gas temperature is higher, the precooling can produce the comdenstion water in transportation process, the comdenstion water accumulation can hinder gas transport to absorb partial gaseous pollutants, form acidizing fluid on the one hand and corrode the sampling pipeline, influence the accuracy nature that gas detected even. Therefore, the existing method generally adopts heating and heat preservation of flue gas, keeps a certain temperature for preventing condensation, sends the flue gas into a gas component detection device, then carries out condensation dehumidification in the gas component detection device, and sends the flue gas into an analyzer after being changed into low-temperature dry gas. Because during the design, certain heating pipeline generally need be reserved to the emergency that the adaptation job site appears, unnecessary part need be cut off in the work progress, and current heating pipeline outwards deviates from easily when intercepting, influences the heating effect after the intercepting, and heating efficiency is not high when using, consequently, needs to improve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flue gas adds fever type pipeline to the not enough of prior art existence.

In order to achieve the purpose, the utility model provides a flue gas heating pipeline, which comprises a sampling pipe, wherein two first wire grooves and a plurality of second wire grooves are arranged outside the sampling pipe, the two first wire grooves are arranged along the axial direction of the sampling pipe, the second wire groove is transversely connected between the two first wire grooves, the outer side of the sampling pipe is wrapped with a heat conduction layer, the heat conduction layer is formed by coiling tinfoil paper, the outer sides of the heat conduction layers in the two first wire grooves are respectively provided with a power wire, the outer side of the heat conduction layer in each second wire groove is provided with a heating wire, two ends of the heating wire are respectively connected with two power wires, the outer sides of the power wire and the heating wire are respectively wrapped with an insulating layer, the outer side of the heat conduction layer is provided with an inner cladding, one end of the power wire is positioned between the inner cladding and the heat conduction layer and is, and a heat insulating layer and an outer cladding layer are sequentially arranged on the outer side of the inner cladding layer.

Further, the plurality of second slots are arranged obliquely and in parallel.

Furthermore, the insulating layers on the outer sides of the power line and the heating wire are insulating paint layers.

Further, the sampling tube is a polytetrafluoroethylene tube, and the inner diameter of the sampling tube is 0.6-0.8 cm.

Further, the inner cladding is formed by coiling a mica woven tape or a glass fiber woven bag.

Further, the depth of the second wire groove is not larger than the diameter of the heating wire.

Further, the heating wire is a nichrome heating wire.

Has the advantages that: the utility model discloses a set up first wire casing and a plurality of second wire casing in the sampling pipe outside, set up power cord and heater strip respectively in first wire casing and a plurality of second wire casing, the slippage is difficult for appearing, unnecessary heating wire directly exposes in the outside when the construction, is convenient for cut, twines the tinfoil paper at the sampling pipe and forms the heat-conducting layer to set up a plurality of heater strips parallel slope, and then realize that the heating is even and improve heating efficiency, and do not influence the pliability of pipeline.

Drawings

Fig. 1 is a schematic side view of a flue gas heating pipeline according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the area A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a flue gas heating pipeline according to an embodiment of the present invention;

fig. 4 is a partially enlarged structural view of a region B in fig. 3.

Detailed Description

The present invention will be further clarified by the following embodiments with reference to the attached drawings, which are implemented on the premise of the technical solution of the present invention, and it should be understood that these embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention.

As shown in fig. 1 to 4, the embodiment of the present invention provides a flue gas heating pipeline, which includes a sampling tube 1, wherein the sampling tube 1 preferably adopts a polytetrafluoroethylene tube, which can bear high temperature, and the inner diameter of the sampling tube 1 is 0.6 to 0.8 cm. Two first thread grooves 2 and a plurality of second thread grooves 3 are provided on the outside of the sampling tube 1, the first thread grooves 2 and the plurality of second thread grooves 3 preferably being formed directly during the production of the sampling tube 1. Two first wire casings 2 all set up along the axial of sampling pipe 1, and a plurality of second wire casings 3 transverse connection have heat-conducting layer 4 between two first wire casings 2 in the outside parcel of sampling pipe 1, and heat-conducting layer 4 preferably adopts the tinfoil paper parcel to form, and then makes heat-conducting layer 4 crooked, satisfies the needs when the construction is laid and is used. The outer sides of the heat conduction layers in the two first wire grooves 2 are respectively provided with a power line 5, when the heat conduction device works, the two power lines 5 are respectively connected with two poles of the heating power supply, the two first wire grooves 2 are preferably arranged oppositely, and then the two power lines 5 are arranged oppositely, so that the short circuit is further avoided. The outer side of the heat conduction layer in each second wire slot 3 is provided with a heating wire 6, the heating wire 6 preferably adopts a nickel-chromium alloy heating wire, the resistivity, the anti-oxidation effect and the mechanical strength of the heating wire are better, and the use requirement is met. Two ends of the heating wire 6 are respectively connected with two power wires 5, an inner cladding 7 is arranged on the outer side of the heat conduction layer 4, one end of the power wire 5 is positioned between the inner cladding 7 and the heat conduction layer 4, an insulating sleeve 10 is arranged at the end, and the other end of the power wire extends out of the outer side from the position between the inner cladding 7 and the heat conduction layer 4 so as to be connected with a temperature controller. The outer side of the inner cladding 7 is sequentially provided with a heat insulation layer 8 and an outer cladding 9, the heat insulation layer 8 can be formed by filling heat insulation materials such as rock wool and the like, and the outer cladding can be a plastic layer.

In order to achieve uniform heating, the plurality of second wire grooves 3 are preferably arranged in parallel, and the plurality of second wire grooves 3 are arranged obliquely to increase the heating coverage of each heating wire 6 and avoid an excessive number of heating wires. In order to improve the safety, the power line 5 and the heating wire 6 are covered with an insulating layer, preferably an insulating paint layer with a heat resistance grade of N or more, which can be used safely at a heating temperature of 200 ℃ or lower, and more preferably, the power line is sleeved with an insulating layer such as heat shrinkable tube or polytetrafluoroethylene to improve the insulating effect. Inner cladding 7 preferably adopts mica braid over braid or glass fiber braided bag to coil and forms, and the degree of depth of second wire casing 3 is not more than the diameter of heater strip 6, and then 7 parcels in inner cladding behind heat-conducting layer 4, can make heater strip 6 and 4 close laminatings of heat-conducting layer, improve heat conduction efficiency.

When the device is used, when a pipeline needs to be cut to a certain length, one end exposed out of a power line 5 is firstly pre-cut integrally from a sampling pipe 1 to an outer cladding 9, then a heat conduction layer 4 with the length of about 20cm is inwards cut from the end part to the outer cladding 9, so that the sampling pipe 1 with the length of about 20cm is exposed out, then an exposed heating wire 6 is cut off, the exposed power line 5 is sleeved with a heat shrinkage pipe for protection, then a temperature sensor is inwards inserted along the sampling pipe 1 and is fixed by a high-temperature adhesive tape, the power line and the temperature sensor are respectively connected with a temperature controller, heating can be controlled by the temperature controller, the sampling pipe 1 is connected into a gas component detection device, smoke can be insulated to a set temperature in the pipeline, and is finally sent into the gas component detection device, and condensation water is prevented from being generated in the pipeline.

The above description is only a preferred embodiment of the present invention, and it should be noted that other parts not specifically described belong to the prior art or the common general knowledge to those skilled in the art. Without departing from the principle of the present invention, several improvements and decorations can be made, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A flue gas heating type pipeline comprises a sampling pipe and is characterized in that two first wire grooves and a plurality of second wire grooves are arranged on the outer side of the sampling pipe, the two first wire grooves are arranged along the axial direction of the sampling pipe, the second wire groove is transversely connected between the two first wire grooves, the heat conduction layer is wrapped outside the sampling pipe, the heat conducting layer is formed by coiling tinfoil paper, the outer sides of the heat conducting layers in the two first wire slots are respectively provided with a power wire, the outer side of the heat conducting layer in each second wire slot is provided with a heating wire, two ends of the heating wire are respectively connected with two power lines, the power lines and the outer side of the heating wire are respectively wrapped with an insulating layer, an inner cladding is arranged on the outer side of the heat conduction layer, one end of the power line is positioned between the inner cladding and the heat conduction layer, and the power cord is provided with an insulating sleeve, the other end of the power cord extends out of the outer side from the position between the inner cladding and the heat conducting layer, and the outer side of the inner cladding is sequentially provided with a heat insulating layer and an outer cladding.

2. The flue gas heated pipeline of claim 1, wherein the plurality of second slots are disposed obliquely and in parallel.

3. The line of claim 1, wherein the insulation layer outside the power cord and the heater wire is a layer of enamel.

4. The flue gas heated pipeline of claim 1, wherein the sampling tube is a polytetrafluoroethylene tube having an inner diameter of 0.6 to 0.8 cm.

5. The pipe of claim 1, wherein the inner wrap is formed by coiling a woven mica tape or a woven glass fiber tape.

6. The flue gas heated pipeline of claim 1, wherein the depth of the second wire chase is no greater than the diameter of the heating wire.

7. The line of claim 1, wherein the heating wire is a nichrome heating wire.

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