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Sustainable and safe pipe for supplying gas fuel to cooking range combusting device

A gas fuel and burner technology, applied in the direction of hoses, pipes, pipes/pipe joints/fittings, etc., can solve the problems of pipeline flexibility loss, propane leakage, difficult extrusion, etc.

Inactive Publication Date: 2009-07-01
马克西玛(加拿大)实验室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, propane leaks are undesirable due to its global warming potential
Therefore, there are few points of contact to provide a hermetic seal
Third, since the liner only touches the highest point on the fitting, it may be easy to push the tube off the fitting
[0040] Various types of pipelines have been proposed and used to solve this problem, however, with only partial success
Tubing made of materials such as fluorocarbons, nylon, polypropylene, etc. can reduce permeability; however there is a loss of flexibility in the tubing
Also, some types of piping can be several times more expensive to construct than rubber or polyethylene piping
Additionally, fluorocarbons have a high softening point, making it difficult to extrude in an energy-efficient manner
Also, during extrusion, fluoropolymers always carry the potential concern of forming corrosive HF gas in the molten state while in contact with polymers containing carbon and hydrogen in their molecules, such as polyethylene.

Method used

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  • Sustainable and safe pipe for supplying gas fuel to cooking range combusting device
  • Sustainable and safe pipe for supplying gas fuel to cooking range combusting device
  • Sustainable and safe pipe for supplying gas fuel to cooking range combusting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] For LPG permeability, at Figure 8 The barrier properties of layered tubing comprising an inner layer composed of polyester sold under the trademark EASTPAK9921 (also known as Voridian PET 9921) were tested in a specially designed experimental setup described in . As shown, a glass sleeve (72) is used which contains a sleeve (74) and a branch (76) extending inside the sleeve (74) and to a seal at the end of the sleeve Components (80). The manifold ( 76 ) is provided with a septum ( 82 ) which can be pierced by the needle of the sampling syringe. Conduit (78) is connected at its ends to inlet (84) valve and outlet (86) valve by conduit (88) extending through sealing member (90).

[0166] The sleeve (72) is filled with high purity helium that contacts the portion of the outer surface of the tubing (78) inside the sleeve (74). After continuous purging, the pipe (78) is filled with LPG or other test gas by opening the inlet valve (84) and closing the outlet valve (86), a...

Embodiment 2

[0178] The permeability properties of selected quantities of LPG pipes from the global market were measured and compared with the SST of the present invention. The experimental procedure used for the measurements as described in Example 1 follows.

[0179] GC response represents a measure of permeability. Commercial LPG tubes from two major countries where LPG tubes are mainly used were tested. The results are shown in Table 2, and the corresponding data are plotted in Figure 10 middle. as from Figure 10 with 11 It can be seen that infiltration occurs from the LPG pipes of countries 1 and 3, while the newly invented SST mainly does not allow infiltration due to its such an effective barrier.

[0180] Table 2

[0181] Comparative Results of Propane Permeation (as a Function of GC Response vs. Time) for Commercial LPG Tubes of the Invention

[0182]

[0183] N.D: Not detected

Embodiment 3

[0185] The permeability of SST (in terms of GC response) was measured using the method described in Example 1 for fuels such as methane or hydromethane blended fuels. The results are shown in Table 3, and the corresponding data are plotted in Figure 11 middle. The zero permeability of fuel from the tube of the present invention is created by the barrier layer PET as a layer.

[0186] table 3

[0187] Results of Permeation of LPG, Methane or Hydrogen Methane Blended Fuels from Tubes of the Invention (as Function of GC Response vs. Time)

[0188]

[0189] N.D: Not detected

[0190] In Tables 4, 5 and 6 the results for the permeation data obtained from countries 1 and 2 for various pipelines are given. For greater clarity, the penetration data are also plotted on Figures 12 to 19 middle. Typical results show that all components of LPG are permeated.

[0191] Table 4

[0192] Results of LPG permeation (according to GC response) of tube 1 from country 1 (Asia) versus t...

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Abstract

The invention discloses a impermeable, sustainable and safe multi-layer pipeline which is used for transporting gaseous fuel for stove equipped with a combustor and other appliance, such as liquefied petroleum gas (LPG), natural gas (NG) and hydrogen-methane mixture fuel. The thermoplastic layered pipeline comprises an innermost layer, a middle layer and an outer layer, at least one of which comprises polyester and polyethylene terephthalate to fully prevent penetration. The polyester is used as performance [blocking] layer. The performance PET layer is preferably constructed as snake-shaped / corrugated cylindrical structure. The other inner layer, the middle layer and the outer layer of the gaseous fuel pipeline are thermoplastic polymer in various combination forms, and have better structure or bonding layer. The performance blocking layer can also be composed of single-layer or combined copolyester, EVOH or nylon, so as to reduce the penetration to the minimum which can be neglected, but not zero realized by using PET. The pipeline of the invention, known as 'SST', provides pollution (penetration) pipelines used at present, and reduces discharge of the greenhouse gas, therefore the problem that non-polluting alternatives for global warming exist for a long term is solved.

Description

technical field [0001] The present invention relates to an impermeable multilayer pipeline for conveying gaseous fuel for appliances equipped with burners. The present invention relates to a further improvement of the pipes currently used for supplying LPG (Liquefied Petroleum Gas) into cooking appliances. More specifically, the present invention proposes a relatively safe, impermeable and chemically stable thermoplastic flexible layered conduit for transporting fuel gas from a portable or stationary source into a burner, Possesses impermeability close to that of glass. The invention is well suited for use in a variety of applications such as gaseous fuel supply lines for indoor and outdoor cooking appliances, Bunsen burners and other types of burners in colleges, universities, hospitals and industrial laboratories, and in Other devices for these gaseous fuels are required at low pressures and temperatures. The ducts provide an improvement over ducts currently in use in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/12
Inventor 拉伊·N·潘迪特里·L·杰克逊
Owner 马克西玛(加拿大)实验室
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