A device and method for recovering gas released from pipe networks using ang technology
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A technology of releasing gas and recovering pipes, which is applied to the method of container discharge, container filling method, equipment discharged from pressure vessels, etc., can solve environmental problems such as pollution, resource waste, etc., and achieve environmental pollution mitigation, environmental protection, and quantity little effect
Active Publication Date: 2016-04-13
佛山市寰晟通新能源科技有限公司
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[0008] The purpose of the present invention is to provide a device and method for recovering the exhaust gas of the pipe network by using ANG technology, aiming at the current situation of waste of resources and environmental pollution caused by the direct emptying of the above-mentioned diffuse gas, and the deficiency of the recovery technology of the diffuse gas. gas recovery
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Embodiment 1
[0053] Taking a 1000m-long high-pressure gas pipeline with maintenance (pressure 4.0MPa, temperature 20°C) as an example, the natural gas reserves stored in this pipeline section are 33000Nm calculated according to the pipe diameter of the West-East Gas Pipeline (pipe diameter is about 1000mm) 3 , and it is assumed that the gas source gas meets the design standard.
[0054] In application, use the cut-off valve 5 to isolate the pipe section, connect the device to the general interface 1 and the relief valve 3 on the pipe section; open the main control valve 6, and the online chromatographic detector 7 starts working at the same time to analyze the composition of the intake air. After the detection by the chromatographic detector 7 is completed, the device starts to run.
[0055] In the initial stage, since the intake pressure is 2.5MPa higher than the minimum gas storage pressure, the control system closes the second control valve 9 and the third control valve 10, opens the fi...
Embodiment 2
[0060] see figure 1 , figure 2 and Figure 5 , this embodiment is the same as the device of embodiment 1. The difference between this embodiment and Embodiment 1 is that this embodiment is an example of utilizing the vented gas stored in the ANG recovery vehicle.
[0061] The effective gas storage volume of the ANG gas storage tank on the ANG recovery vehicle is 45m 3 , the gas storage pressure is 3MPa as an example, the natural gas reserves stored in this pipeline section are 5400Nm 3 .
[0062] In application, connect the device to the common interface 1 and the air inlet of the downstream user; open the main control valve 6, and the device starts to run.
[0063] During the gas consumption process of desorption and degassing, the control system keeps the second control valve 9 and the third control valve 10 closed, opens the first control valve 8, and the natural gas in the ANG gas storage tank 16 is measured through the flow rate 15 and flushed. The pre-adsorption t...
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Abstract
The invention discloses a device and method for recycling diffused gas in a pipe network by using an ANG (Adsorbed Natural Gas) technique. The device is mainly composed of a detection control system, a pressure adjusting system, a gas storage system, a circulating water temperature control system and a control system, wherein the detection control system comprises a general connector, a control main valve and an online chromatograph detector; one end of the general connector is connected with a diffusion valve of a to-be-repaired pipe section, so that gas enters; the other end of the general connector is connected with the control main valve; the online chromatograph is connected to the bypass at the rear end of the main control valve; the pressure adjusting system comprises a compressor, a cooler and first, second and third control valves; the second control valve, the compressor, the cooler and the third control valve are in serial connection through pipelines in sequence, so as to form a first path; the first control valve and the pipelines form a second path; the first and second paths are connected in parallel; the front end of the paralleled connection is communicated with the control main valve. According to the device and method, the greenhouse effect caused by diffused natural gas is fully reduced; the energy is effectively saved; the technical process is safe, simple and high in self-control degree and can be started and stopped immediately; the device can flexibly move among natural gas recycling spots at different places.
Description
technical field [0001] The invention belongs to the field of natural gas release gas recovery, and relates to a device and method for recovering release gas from a natural gas pipe network, and in particular to a device and method for recovering release gas from a pipe network using ANG technology. Background technique [0002] With the successive construction of pipelines such as West-to-East Gas Transmission, Sichuan-to-East Gas Transmission, and the Second West-to-East Gas Pipeline, my country's city gas has entered a period of sustained and rapid development. At the same time, with the vigorous development of urban pipeline natural gas, the problem of natural gas emission during the construction, operation and maintenance of the gas pipeline network has begun to attract people's attention, especially during the repair and maintenance of the gas pipeline network. Natural gas release problem. At present, conventional urban gas pipeline network maintenance and emergency re...
Claims
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Application Information
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