A new device and method for rapid and continuous generation of hydrates on trays

Abstract

A new type of rapid and continuous hydrate generation device with trays, including a reactor, the reactor includes an inner cylinder and an outer cylinder, and a sieve plate inclined toward the outer cylinder is arranged between the inner cylinder and the outer cylinder; a gas outlet is arranged on the top of the outer cylinder , the bottom is provided with a circulating water outlet and a discharge port, wherein the discharge port is located above the sieve plate; the inner cylinder is a cylindrical structure with upper and lower openings, and a gas distributor and a water jet are arranged under the bottom of the inner cylinder ; Several layers of trays are arranged vertically along the axial direction of the inner cylinder. At the same time, the invention also discloses a method for preparing hydrate using it. The invention applies the three-dimensional mass transfer tray to the formation of hydrate for the first time, which not only accelerates the reaction, but also conducts mass transfer between the gas-liquid two-phase on the three-dimensional tray, and realizes the full turbulent renewal of the gas-liquid-solid three-phase interface ; Effectively solve the two major problems of rapid renewal of gas, liquid and solid three-phase interface and rapid removal of hydration reaction heat in hydrate formation.

Description

technical field [0001] The invention belongs to the technical field of natural gas hydrate preparation, and in particular relates to a novel device and method for rapid and continuous generation of hydrate by trays. Background technique [0002] Hydrate is a special kind of encapsulation compound: it is a non-stoichiometric compound formed by enveloping guest molecules in cage-shaped cavities formed by hydrogen bonds between water molecules under certain temperature and pressure conditions. The guest molecules mainly include some small molecular gases (H 2 、CH 4 , N 2 , CO 2 、C 2 h 4 、C 2 h 6 etc.) and some non-gas molecules [bromomethane (CH 3 Br), tetrahydrofuran (THF), cyclopentane (CP), tetrabutylammonium bromide (TBAB), etc.]. At present, the most researched is gas hydrate. Natural gas has many components, the main component of which is methane gas. As a cost-effective energy source, methane hydrate has received extensive attention. Under standard conditions, ...

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Problems solved by technology

[0003] However, as far as the current research status is concerned, the rapid synthesis of natural gas hydrate is still immature. The main problems hindering the commercialization of this technology are the slow formation of hydrates and the difficulty of storage.

The techniques used to prepare gas hydrate mainly include static contact, stirring, bubbling, etc., but the techniques used to prepare gas hydrate have their own advantages and disadvantages. Among them, in the stirred reactor, as the hydrate continues to grow, the gas- The liquid-solid three phases cannot be kept well mixed, limiting the mass transfer at the gas-liquid interface

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