How does Hunchun gas regulator check Yun Feng ice blocking?
In the past, ice plugging was usually treated by means of spray lamps and hot water heating. After the ice was roasted, the water was then swept away by gas. No matter which conventional means, it is a kind of damage to the pipeline anticorrosive layer, and it is more laborious. It is based on the above reasons. According to the principles of physics and chemistry, two kinds of plugging removal schemes, namely eddy current nondestructive thawing technology and adding reaction agent, have been developed.
1 eddy current undamaged thawing technology, eddy defrosting technology, is the technology of converting electric energy into magnetic field and magnetic field to heat energy. The cable is twisted on the line of thawing, so the cable forms a device similar to the magnetic coil. The magnetic field is in the center of the maximum intensity, so the heat generated by the pipeline center is changed by the radial gradient along the pipeline, and the ice in the pipeline is melted out for a certain time. The technology can not destroy the insulation layer, so that the steam injection ice blocking pipeline can be thawed back to normal.
Measures to solve the ice jam in the gas pipeline of moistening and Fung
2 the most commonly used reaction agent to decompose hydrate crystals is methanol (Xylin) with a molecular formula of CH3OH.
In addition, glycol (ethylene glycol) CH3CH2OH, two glycols, three glycols and four glycols were used as reactants. The reason why alcohols can be used to decompose or prevent the formation of hydrates is that the steam and steam can form a solution, and the water vapour becomes condensate and reduces the critical point of forming the hydrate.
The freezing point of alcohol solution is much lower than that of water and absorbs the water vapor in the gas, thus reducing the dew point of the gas. Where alcohol is used, drainage devices are installed to discharge liquid from the gas pipeline.
Measures to solve the ice jam in the gas pipeline of moistening and Fung
Especially in winter, it is necessary to add reactant, and the injection volume of alcohol is 0.1 to 0.15 of the volume of natural gas transported.
The specific practice of the running area is to plant the DN15 or DN20 discharge tube after the unit valve or pressure regulator is introduced into the tube. The length of the discharge tube is about 100mm, the end is wound with the raw material belt, and the seal is blocked by the thread tube.
2.1 technical advantages for new or rebuilt projects, the introduction pipe of the unit vertical pipe is composed of two three links, and the 8cm pipeline is left out in the reserved part of the three pass, and the pipe is blocked well. This has the following advantages:
Measures to solve the ice jam in the gas pipeline of moistening and Fung
(1) when ice blockage occurs, most of the pipes are frozen at the surface of the tube, and the pipe plugs above the unit valves can be opened and injected into the reactants. After thaw, it can avoid the influence of opposites, and the use of hard equipment such as steel drill will not affect the pipe.
(2) it is beneficial to strength test, gas tightness test and blowing, and the two three - way structure is equivalent to separating the tube from the riser. In the experiment, the unit valve is not disassembled.
(3) if the riser contains water or dust, it can be opened and blocked easily.
Measures to solve the ice jam in the gas pipeline of moistening and Fung
(4) when pipe replacement is put into operation, the pipe plugging part can be used as a replacement point for the courtyard pipe network.
(5) close the unit valve and do the purge work of medium pressure level without affecting the indoor meter. The shortcoming is that two more pipe plugs are added to the original scheme, which increases the maintenance cost.
Www.hsrf0318.com
Contact: Tan Gong 180-0338-3735 can add WeChat at any time quote QQ:289424295