Microreactor

Abstract

The invention discloses microreaction channel and relates to the field of chemical equipment. The microreaction channel comprises a reinforced mixing cavity which is left and right symmetrical along acentral symmetry axis, wherein the outlet part of the reinforced mixing cavity is provided with a confluent mixing region. A partition body is arranged in the reinforced mixing cavity. The partitionbody and the inner wall of the reinforced mixing cavity form a symmetrical first subchannel and a symmetrical second subchannel. And the first subchannel and the second subchannel extend outwards relative to the central symmetry axis to cross the inlet part of the reinforced mixing cavity and then are connected with the confluent mixing region. The microreaction channel has the advantages of a high specific surface area up to 10000-50000 m<2> / m<3>. A fluid in the channel belongs to a horizontal thrust flow, has no vortex and back mixing, and can effectively avoid the bad and uneven mixing effect in the channel caused by the pulse of a feed pump; the microreaction channel has a low pressure drop and good mixing effect. Under a same substrate area, a large channel area the can be arranged, and no area is wasted, so the liquid holdup is large and the residence time is long.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a microreactor. Background technique [0002] The so-called microreactor refers to at least partially adopting microreaction technology or ultra-precision processing technology in manufacturing technology, and the characteristic size of its internal structure (such as flow channel) is between submicron and submillimeter. Compared with conventional reaction equipment (such as reactor, tubular reactor), the characteristic size of microreactor is much smaller, which makes it have a large specific surface area, and as the size decreases, the gradient of some physical quantities will increase. Acceleration, such as temperature gradients, pressure gradients, concentration gradients and density gradients, etc., which is especially important for chemical reactions. The increase of the gradient will lead to the increase of the mass transfer and heat transfer driving force, thereby expan...

AI Technical Summary

Problems solved by technology

[0003] In an existing microfluidic device, the shape of the channel used tends to be circular, resulting in a small number of channels arranged in the same plane, resulting in a decrease in liquid holding capacity, thus affecting the residence time, and in the device There is a large area of ​​flow dead zone between the partitioned redirecting wall and the column, and after the fluid passes through the partitioned redirecting wall and flows to the column, it will cause a large amount of back mixing after being impacted, which destroys the plug flow state. In some chemical reactions , will cause the occurrence of by-products

[0004] In another existing microreactor, "the reaction chamber is rectangular, and its outlet includes a V-shaped channel with gradually narrowing width and a linear channel with equal width". The flow of the fluid produces a direct impact, which directly changes the direction of fluid movement by more than 90°. This positive impact causes a large amount of energy loss, and the rectangle does not conform to the streamline of the fluid. There must be a large number of dead zones at the turn

[0005] All do not consider the impact of the pump on the function of the microreactor in the above-mentioned two prior art, because the pump usually adopted in the microreactor system is usually a high-pressure low-flow corrosion-resistant pump (such as a plunger pump, a diaphragm pump, etc.), The working principle of this kind of pump causes the flow rate and pressure pulse of the fluid to oscillate. When pumping two streams of fluid at the same time, it is easy to cause the amount of fluid entering the microreactor to not be exactly the same at every moment, which will lead to simultaneous moments and reactions. The concentration and ratio of each fluid in different chambers in the channel are different, which will affect the stability of the reaction

Images