Method and device for quickly preparing natural gas hydrate by employing static hypergravity

Abstract

The invention discloses a fast preparation method and apparatus of natural gas hydrate with static supergravity, which is characterized that: a reactor is connected with an air intake route, a water inlet route and a vomit route; the air intake route and the water inlet route are all provided with compression device; the air intake route is provided with a spout; the water inlet rout is provided with a nozzle; the spout and the spout are all arranged in the reactor; the spout is arranged on the inner wall of the reactor and to the circumferential direction; the nozzle is arranged on the axial position of the upper part in the reactor; an inner cooler is arranged on the axial position of the reactor and an air vent is arranged on the upper part of the reactor. The apparatus can not only remove the hydration heat fast, but also can change the flow field of gas, liquid and solid in the reactor, so as to realize the fast renewal of the three-phase interface of gas, liquid and solid.

Description

technical field [0001] The invention relates to natural gas hydrate, in particular to a method and device for rapidly preparing natural gas hydrate by using static supergravity. Background technique [0002] The existing natural gas hydrate storage and transportation technology is a new technology researched and developed abroad in recent years. A unit volume of hydrate can safely store 150 to 200 times the volume of natural gas; because hydrate has a "self-protection effect", natural gas The large-scale storage and transportation of hydrates under normal pressure does not need to be cooled below the phase equilibrium temperature, but the hydrates should be frozen below the freezing point of water (-15 ~ +5 ℃). If the heat preservation is good, the hydrates can remain stable with almost no Natural gas leaks; in addition, natural gas hydrate is very safe, even if it is ignited by an open flame, it burns slowly; compared with pipeline natural gas transportation or liquefied na...

AI Technical Summary

Problems solved by technology

[0003] Based on the shortcomings of previous production processes, some improved methods and devices for hydrate production have been proposed. Generally, two or three of the three basic methods of stirring, spraying and bubbling are combined to enhance quality and heat. The transmission of natural gas hydrate increases the formation rate of gas hydrate, but the effect is still not ideal

Later, some new hydrate production methods were proposed one after another. For example, Japanese patent document JP2005232301A discloses such a tubular hydration reactor. The gas-liquid two-phase is fully mixed and reacted in the tube, and the cooling medium is sprayed outside the tube to remove the heat of hydration. Disclosed a kind of tubular hydration reactor in Japanese patent document JP2006111773A, has set up helical vane rotation in the pipe to remove hydrate; The removal rate is still relatively low; for example, Japanese patent document JP2006111786A discloses a jet-type hydrate production process and equipment, the liquid is injected from the ejector through a high-pressure pump, and natural gas is sucked in at the same time, mixed and injected into the reactor; in order to increase the mass transfer rate , Japanese Patent 2005263825A further installed a stirring device in the jet reactor; another example, in Japanese Patent Document JP2005247919A, discloses a fluidized bed hydration reactor; A tubular cooler is installed in the fluidized bed hydration reactor to improve its ability to remove the heat of hydration; the gas in the fluidized bed reactor flows upward at high speed to fluidize the hydrate grains, and the gas-liquid contact area and renewal rate are relatively small. Large, the hydration reaction is violent, but the heat of hydration is basically taken away by excess gas, and it is difficult to take out the hydrate, so it is difficult to realize industrial production

There are many existing methods and devices for producing hydrates, but they still cannot effectively solve the two major problems of rapid renewal of the gas-liquid-solid three-phase interface and rapid removal of hydration reaction heat during hydrate formation.

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