CN-119794035-A - Gas cylinder correction and reuse method

Abstract

The invention discloses a gas cylinder correction and recycling method, which relates to the technical field of gas cylinder recycling and comprises the following steps of S1, cutting and intercepting cylinder segments of retired gas cylinders, S2, performing anti-fatigue treatment on inner containers of the cylinder segments, S3, performing a hydraulic test on the cylinder segments to ensure that the strength of the cylinder segments meets the working pressure requirement of a use environment, S4, connecting a plurality of cylinder segments into a pipeline through a sealing connection device, and S5, performing a hydraulic pressure test on the pipeline to ensure that the pipeline meets the working pressure requirement. The invention can effectively recycle the retired gas cylinder, exert more residual value, reduce waste of resources, and is beneficial to environmental protection and cost saving.

Inventors

• LI MING
• SUN WANLI
• LI HUASHENG
• SHI YUANFA
• XU NING
• JIANG MIN

Assignees

• SINOMA SCIENCE & TECH SUZHOU CO LTD
• SHENYANG ZHONGFU KEJIN PRESSURE VESSELS CO LTD

Dates

Publication Date

20250411

Application Date

20250107

Priority Date

20250107

Claims (10)

1. 1. The gas cylinder correction and reuse method is characterized by comprising the following steps of: S1, cutting and intercepting a cylinder section of a retired gas cylinder; S2, performing anti-fatigue treatment on the liner of the barrel section; s3, carrying out a hydrostatic test on the cylinder section to ensure that the strength of the cylinder section meets the working pressure requirement of the use environment; s4, connecting a plurality of barrel sections into a pipeline through a sealing connection device; And S5, carrying out water pressure test on the pipeline to ensure that the pipeline meets the working pressure requirement.
2. 2. The gas cylinder correction and recycling method according to claim 1, wherein the sealing connection device comprises a connection cylinder, conical sealing sleeves and sealing rings, two ends of the connection cylinder are respectively sleeved with one conical sealing sleeve, one side, close to the middle of the connection cylinder, of each conical sealing sleeve is provided with a connection flange, the connection flange is fixed on the outer wall of the connection cylinder, a concave hole is formed in one surface, opposite to the connection flange, of the conical sealing sleeve, a first threaded hole corresponding to the concave hole is formed in the connection flange, a first bolt is in threaded connection with the first threaded hole, and the first bolt is inserted into the concave hole through the first threaded hole; The conical sealing sleeve is provided with an outer conical surface and an inner conical surface, wherein the outer conical surface is inwards inclined from one end close to the connecting flange to the other end, and the inner conical surface is outwards inclined from one end close to the connecting flange to the other end; The two ends of the connecting cylinder are provided with connecting outer conical surfaces matched with the inner conical surfaces, and the two ends of the inside of the cylinder body section are provided with cylinder body inner conical surfaces matched with the outer conical surfaces.
3. 3. The method for correcting and recycling a gas cylinder according to claim 1, wherein the decommissioned gas cylinder is a type II, type III or type IV cylinder.
4. 4. The method for correcting and recycling the gas cylinder according to claim 1, wherein the anti-fatigue treatment is to mold a layer of plastic on the surface of the liner of the cylinder section.
5. 5. The method for correcting and recycling the gas cylinder according to claim 4, wherein the plastic on the surface of the liner of the cylinder section is formed by rotational molding, blow molding or brushing.
6. 6. The method for correcting and recycling a gas cylinder according to claim 4, wherein the plastic material is a thermoplastic resin or a thermosetting resin.
7. 7. The method for corrective and reutilizing a gas cylinder according to claim 6, wherein said thermoplastic resin is PE, PP, PET or PA.
8. 8. The method for correcting and recycling a gas cylinder according to claim 6, wherein the thermosetting resin is epoxy resin, unsaturated polyester resin or phenolic resin.
9. 9. The method for correcting and recycling a gas cylinder according to claim 1, wherein before the cylinder section is connected with the sealing connection device, surface roughness treatment is performed on a sealing part of the cylinder section for being connected with the sealing connection device, so that the surface smoothness of the sealing part is ensured.
10. 10. The gas cylinder correction recycling method according to claim 1, wherein in the step S4, the end parts of the pipelines formed by connecting the cylinder sections are connected with an outer connecting pipe through a wedge-shaped sealing assembly, the wedge-shaped sealing assembly comprises an inner wedge-shaped sealing ring and an outer wedge-shaped sealing ring, the outer wedge-shaped sealing ring is sleeved outside the inner wedge-shaped sealing ring, a mutually matched wedge-shaped surface is arranged between the outer wedge-shaped sealing ring and the inner wedge-shaped sealing ring, the inner wedge-shaped sealing ring is sleeved at the end parts of the outer connecting pipe, the outer wedge-shaped sealing ring is arranged at the inner end parts of the pipelines, an external flange is fixedly arranged on the outer wall of the outer connecting pipe, a bolt through hole is formed in the external flange, a second threaded hole corresponding to the bolt through hole is formed in the inner wedge-shaped sealing ring, the second bolt penetrates through the bolt through hole and is connected in the second threaded hole, the inner wedge-shaped sealing ring is pulled towards the external flange through screwing down by tightening the second bolt, and the inner wedge-shaped sealing ring can extrude the outer wedge-shaped sealing ring outwards.

Description

Gas cylinder correction and reuse method Technical Field The invention relates to the technical field of gas cylinder recycling, in particular to a gas cylinder correction and recycling method. Background The present composite material gas cylinder recovery mainly comprises three methods of chemical recovery, physical recovery and energy recovery, wherein the chemical recovery is a method for changing waste into usable other substances (such as fuel gas and fuel oil) by utilizing a chemical modification or decomposition method, the technical difficulty is high, the equipment requirement is high, the recovery cost is high, the physical recovery is used for crushing or melting the waste as the raw material of the material, the production cost is low, the treatment method is simple, but the selectivity of the waste is high, the treatment capacity is limited, the energy recovery method is used for treating the waste through incineration and the like, and the organic matters in the waste are converted into heat energy or other energy through combustion for application. All three methods treat the decommissioned gas cylinder as waste, and the decommissioned gas cylinder has no utilization value, but the residual value of the decommissioned gas cylinder is not fully discovered. For example, some high-pressure composite gas cylinders have high design pressure which is far higher than the pressure of civil pipelines, and the residual strength of the gas cylinders is still far higher than that of common civil pipelines after the gas cylinders are retired. If the waste bottle is further processed, the waste bottle is effectively recycled so as to exert more residual value, the waste of resources is greatly reduced, and the waste bottle recycling device is beneficial to environmental protection and cost saving. Disclosure of Invention The invention aims to provide a gas cylinder correction and recycling method, which solves the problems in the prior art, can effectively recycle retired gas cylinders, plays more residual values, reduces the waste of resources, and is beneficial to environmental protection and cost saving. In order to achieve the above object, the present invention provides the following solutions: The invention provides a gas cylinder correction and reuse method, which comprises the following steps: S1, cutting and intercepting a cylinder section of a retired gas cylinder; S2, performing anti-fatigue treatment on the liner of the barrel section; s3, carrying out a hydrostatic test on the cylinder section to ensure that the strength of the cylinder section meets the working pressure requirement of the use environment; s4, connecting a plurality of barrel sections into a pipeline through a sealing connection device; And S5, carrying out water pressure test on the pipeline to ensure that the pipeline meets the working pressure requirement. In an embodiment, the sealing connection device comprises a connection cylinder, a conical sealing sleeve and a sealing ring, wherein two ends of the connection cylinder are respectively sleeved with the conical sealing sleeve, one side, close to the middle part of the connection cylinder, of each conical sealing sleeve is provided with a connection flange, the connection flange is fixed on the outer wall of the connection cylinder, a concave hole is formed in one surface, opposite to the connection flange, of the conical sealing sleeve, a first threaded hole corresponding to the concave hole is formed in the connection flange, and a first bolt is in threaded connection with the first threaded hole and is inserted into the concave hole through the first threaded hole; The conical sealing sleeve is provided with an outer conical surface and an inner conical surface, wherein the outer conical surface is inwards inclined from one end close to the connecting flange to the other end, and the inner conical surface is outwards inclined from one end close to the connecting flange to the other end; The two ends of the connecting cylinder are provided with connecting outer conical surfaces matched with the inner conical surfaces, and the two ends of the inside of the cylinder body section are provided with cylinder body inner conical surfaces matched with the outer conical surfaces. In one embodiment, the decommissioned gas cylinder is a type II, type III, or type IV cylinder. In one embodiment, the anti-fatigue treatment is to mold a layer of plastic on the surface of the liner of the barrel section. In one embodiment, the plastic on the surface of the liner of the barrel section is formed by adopting rotational molding, blow molding or brushing technology. In one embodiment, the plastic material is a thermoplastic resin or a thermosetting resin. In one embodiment, the thermoplastic resin is PE, PP, PET or PA. In one embodiment, the thermosetting resin is an epoxy resin, an unsaturated polyester or a phenolic resin. In one embodiment, before the barrel section is connected with t