CN101113379B

CN101113379B - Two-stage series reactor for synthesis of natural gas hydrates

Info

Publication number: CN101113379B
Application number: CN2007100724982A
Authority: CN
Inventors: 焦文玲; 宋汉成; 赵林波
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2007-07-11
Filing date: 2007-07-11
Publication date: 2010-09-15
Anticipated expiration: 2027-07-11
Also published as: CN101113379A

Abstract

The invention relates to a double-stage and serial connection reactor synthesized by natural gas and hydrate relating to a synthesized reactor of natural gas and hydrate. The invention overcomes the defectiveness of the existing reactors of bubbling type that the hydrate is easily iced and blocked on the surface of an orifice plate and the defectiveness of the existing reactor of spraying type that the hydrate heat of reaction is difficult to be drained away. The double-stage and serial connection reactor consists of a No.1 reactor, a No.2 reactor, a water inlet pipe, a natural gas inlet pipe and a transfusion pipe. The No.1 reactor comprises a No. 1 autoclave body, a No. 1 spray device and an orifice plate device, with the No.1 spray device being arranged at the top of the inner chamber of the No.1 autoclave body and communicated with the water inlet pipe and the orifice plate being arranged at the bottom of the inner chamber of the No.1 autoclave body and communicated with the natural gas inlet pipe; the No.2 reactor comprises a No.2 autoclave body, a No.2 spray device and a stirring device, with the No.2 spray device being arranged at the top of the inner chamber of the No.2 autoclave body and communicated with the water inlet pipe and the stirring device being arranged at the bottom of the inner chamber of the No.2 autoclave body and the bottom of the No.2 autoclave body being communicated with the natural gas inlet pipe. The side wall of the No.1 autoclave body is communicated with that of the No.2 autoclave body.

Description

Gas hydrate synthetic two-stage series reactor

Technical field

The present invention relates to a kind of synthesis reactor of gas hydrate.

Background technology

Be used for hydrate synthetic reactor in the world and roughly can be divided into following 3 kinds:

1. stirring reactor (see figure 1): the water of packing in the reactor earlier during use, gas enters by reactor bottom, gas and water thorough mixing generate gas hydrate under the effect of agitator, use tube and shell heat exchanger, latent heat that gas hydrate discharged that generates and the heat that agitator produced in rotatable parts such as recycle pump and the reactor are in time taken away.But this simple oar shape stirred reactor is not suitable for industrial application to the increase DeGrain of the synthetic liquid-gas interface contact area of hydrate.

2. bubbling style reactor (see figure 2): utilize high pressure gas to produce bubble by orifice plate, the bubble of rising contacts with water and synthesized hydrate on the gas-to-liquid contact face.Because hydrate layer is along the bubble formation that rises, ascending gas all may make bubble breaking in the slight disturbance at gas-water table place, the fragmentation of bubble can increase the contact surface of bubble, hydrate generates hot can in time taking away by the heat transfer of water simultaneously, thereby has improved the formation speed of hydrate.Bubbling method hydrate synthesizer has increased hydrate synthetic gas-to-liquid contact area, but the aperture of orifice plate is very little, causes hydrate ice stifled easily on orifice plate, influences air inlet, also influences the normal operation of system.

3. spray-type reactor (see figure 3): reactor leaching is in water bath with thermostatic control during use, to keep the water termostat in the spirt reactor, evenly water is extracted out from reactor bottom with a non-pulsation piston pump in the circulating water loop, spray into from the reactor top by nozzle then, atomizing by water can greatly increase the air-water contact area, improves the generating rate of hydrate.But it is to be difficult in time drain hydration reaction heat that spraying process generates the defective of gas hydrate maximum.

Summary of the invention

The purpose of this invention is to provide a kind of gas hydrate synthetic two-stage series reactor, on orifice plate, cause hydrate ice to block up the defective that is difficult in time drain hydration reaction heat with the spray-type reactor easily to overcome existing bubbling style reactor.It is by a reactor 1, No. two reactors 2, water inlet pipe 3, Sweet natural gas inlet pipe 4 and transfer line 5 are formed, No. one reactor 1 comprises kettle 1-1 No. one, spray equipment 1-2 and orifice fitting 1-3, No. two reactor 2 comprises kettle 2-1 No. two, No. two spray equipment 2-2 and whipping appts 2-3, spray equipment 1-2 be arranged on No. one in the kettle 1-1 inner chamber upper top and be communicated with water inlet pipe 3, orifice fitting 1-3 be arranged on No. one in the kettle 1-1 inner chamber the bottom and be communicated with Sweet natural gas inlet pipe 4, No. two spray equipment 2-2 be arranged on No. two in the kettle 2-1 inner chamber upper top and be communicated with water inlet pipe 3, whipping appts 2-3 is arranged on the bottom in the kettle 2-1 inner chamber No. two, the bottom of No. two kettle 2-1 is communicated with Sweet natural gas inlet pipe 4, and the lower sidewall of a kettle 1-1 is connected by transfer line 5 with the side wall upper part of No. two kettle 2-1.

Spray equipment and bubbling device (being orifice fitting) can improve gas in the reactor, water engaging surface is long-pending, promote the generation of hydrate, therefore spray equipment and bubbling device can be arranged in the same reactor.Sweet natural gas sprays in it from the bottom of a kettle 1-1, carries out hydration reaction through the bubbling of orifice fitting 1-3, and the water that the unreacted gas evolution water surface and spray equipment 1-2 spray into carries out hydration once more.When the hydrate that has generated in a reactor flow into No. two reactors, will inevitably carry a large amount of hydrate crystal seeds, such No. two reactors can form hydrate more fast and efficiently.If but No. two reactors still use spray-bubbling reactor, the generation of a large amount of hydrates will cause orifice plate ice stifled easily, therefore No. two reactors provide another reactor, spray equipment and whipping appts are designed in same reactor, abbreviate spray-stirred reactor as, whipping appts also can quicken greatly because a large amount of hydrate generates the heat transmission that produces like this.Because the present invention is arranged on spray equipment and bubbling device in the same reactor, the reaction heat energy that the spray reactor produces is in time taken away by water, the hydrate crystal seed that bubbling style reactor produces is carried in No. two reactors by water, therefore can not cause the ice of a reactor stifled, whipping appts makes the water smoke hydration once more that the unreacted Sweet natural gas effusion water surface and spray equipment spray in No. two reactors, has improved the efficient of hydration reaction.The present invention has increased water and contacting natural gas area by spray equipment, whipping appts and the combination of orifice fitting in two reactors, has solved the discharge problem of stifled problem of ice and hydration reaction heat.

Description of drawings

Fig. 1 is the structural representation of existing stirring reactor, wherein Reference numeral 11 indications is whipping appts, Fig. 2 is the structural representation of existing bubbling style reactor, wherein Reference numeral 12 indications is orifice fitting, Fig. 3 is the structural representation of existing spray-type reactor, wherein Reference numeral 13 indications is spray equipment, and Fig. 4 is a structural representation of the present invention.

Embodiment

Embodiment one: specify present embodiment below in conjunction with Fig. 4.Present embodiment is by a reactor 1, No. two reactors 2, water inlet pipe 3, Sweet natural gas inlet pipe 4 and transfer line 5 are formed, a reactor 1 is by a kettle 1-1, spray equipment 1-2 and orifice fitting 1-3 form, No. two reactors 2 are by No. two kettle 2-1, No. two spray equipment 2-2 and whipping appts 2-3 form, spray equipment 1-2 be arranged on No. one in the kettle 1-1 inner chamber upper top and be communicated with water inlet pipe 3, orifice fitting 1-3 be arranged on No. one in the kettle 1-1 inner chamber the bottom and be communicated with Sweet natural gas inlet pipe 4, No. two spray equipment 2-2 be arranged on No. two in the kettle 2-1 inner chamber upper top and be communicated with water inlet pipe 3, whipping appts 2-3 is arranged on the bottom in the kettle 2-1 inner chamber No. two, the bottom of No. two kettle 2-1 is communicated with Sweet natural gas inlet pipe 4, and the sidewall of a kettle 1-1 is connected by transfer line 5 with the sidewall of No. two kettle 2-1.Behind two reactors, the basic complete reaction of water and gas.

Embodiment two: specify present embodiment below in conjunction with Fig. 4.The difference of present embodiment and embodiment one is: all be provided with ultrasonic generator 6 in the bottom of a kettle 1-1 and the bottom of No. two kettle 2-1.Action of ultrasonic waves can increase the gas storage density of hydrate, accelerates the resultant velocity of hydrate.

Claims

1. gas hydrate synthetic two-stage series reactor, it is characterized in that it is by a reactor (1), No. two reactors (2), water inlet pipe (3), Sweet natural gas inlet pipe (4) and transfer line (5) are formed, a reactor (1) comprises a kettle (1-1), a spray equipment (1-2) and orifice fitting (1-3), No. two reactors (2) comprise No. two kettlies (2-1), No. two spray equipments (2-2) and whipping appts (2-3), a spray equipment (1-2) is arranged on the upper top in a kettle (1-1) inner chamber and is communicated with water inlet pipe (3), orifice fitting (1-3) is arranged on the bottom in a kettle (1-1) inner chamber and is communicated with Sweet natural gas inlet pipe (4), No. two spray equipments (2-2) are arranged on the upper top in No. two kettlies (2-1) inner chamber and are communicated with water inlet pipe (3), whipping appts (2-3) is arranged on the bottom in No. two kettlies (2-1) inner chamber, the bottom of No. two kettlies (2-1) is communicated with Sweet natural gas inlet pipe (4), and the lower sidewall of a kettle (1-1) is connected by transfer line (5) with the side wall upper part of No. two kettlies (2-1).

2. gas hydrate synthetic two-stage series reactor according to claim 1 is characterized in that all being provided with ultrasonic generator (6) in the bottom of a kettle (1-1) and the bottom of No. two kettlies (2-1).