Continuous micro-chemical synthesis equipment and preparation method of nano strontium carbonate

Abstract

The invention discloses continuous micro-chemical synthesis equipment and a preparation method of nano strontium carbonate, and the continuous micro-chemical synthesis equipment comprises a micro-chemical reactor, the injection port of which is hermetically communicated with a third gas-liquid pipe; and the gas-liquid pre-mixing mechanisms are arranged, an output port of each gas-liquid pre-mixing mechanism is communicated with a first gas-liquid pipe, and the first gas-liquid pipe is communicated with the third gas-liquid pipe through a second gas-liquid pipe. According to the device, the gas-liquid pre-mixing mechanism is adopted for pre-mixing reaction substances, jet flow pieces on two sealing seats in the gas-liquid pre-mixing mechanism are symmetrically arranged and perform Y-shaped impact, the dispersion rate of molecules such as carbon and strontium is increased by utilizing the explosion effect of impact, the contact rate between molecules of the two reactants is increased, and then the pre-mixing efficiency is improved.

Description

Technical Field

[0001] The invention specifically relates to the technical field of production of nano strontium carbonate, in particular to continuous micro-chemical synthesis equipment and a preparation method of nano strontium carbonate. Background Art

[0002] In continuous microchemical synthesis equipment, due to the flow characteristics of the fluid and the size limitations of the microchannel, the mixing uniformity of the reactants may be difficult to achieve an ideal state. Although microchemical equipment usually has high mass transfer and heat transfer efficiency, for the synthesis of nano-strontium carbonate, which has more stringent requirements on reaction conditions, slight mixing inhomogeneities may lead to problems such as a widening of the particle size distribution and irregular morphology of the product. In existing microchemical equipment, the production quality can only be improved by relying on the pressure-driven fluid flow rate in the microchannel, and it is difficult to make flexible adjustments like large-scale stirred tanks and other equipment. Therefore, there are certain obstacles to the continuous production of nano-strontium carbonate. Summary of the invention

[0003] To this end, the present invention proposes a continuous micro-chemical synthesis device and a preparation method suitable for nano-strontium carbonate to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a continuous micro-chemical synthesis device for nano-strontium carbonate, comprising:

[0005] A micro-chemical reactor, the injection port of which is sealed and connected with a third gas-liquid pipe;

[0006] and a gas-liquid premixing mechanism, which is provided with a plurality of them, the output port of each of the gas-liquid premixing mechanisms is connected to the first gas-liquid pipe, and the first gas-liquid pipe and the third gas-liquid pipe are connected by a second gas-liquid pipe;

[0007] Among them, each of the gas-liquid premixing mechanisms has a continuous phase feed port for injecting strontium source solution and a dispersed phase feed port for injecting carbon source gas, and the continuous phase feed port and the dispersed phase feed port are connected to pressure pipes, and each pressure pipe is installed with a pressure gauge.

[0008] Further, preferably, the gas-liquid premixing mechanism comprises:

[0009] a lower housing in which a reciprocating drive mechanism is installed;

[0010] An upper shell body, which is sealed and connected to the lower shell body;

[0011] A mixing chamber is fixed in the upper shell, an injection channel is provided between the mixing chamber and the upper shell, and chamber openings communicating with the injection channel are provided on both sides of the bottom of the mixing chamber;

[0012] There are two sealing seats, each of which is sealed by a rotating pin and is movably arranged in the two chamber openings, and the two sealing seats are driven by a reciprocating driving mechanism to perform reciprocating small-amplitude flipping;

[0013] and a partition fixedly connected between the mixing chamber and the upper shell, wherein the partition can separate the injection channel into two parts, and respectively connect the continuous phase feed port and the dispersed phase feed port;

[0014] The two sealing seats are always arranged symmetrically, and each sealing seat is penetrated by a plurality of evenly distributed mounting holes, and a jet component is fixedly installed in each mounting hole.

[0015] Further, as a preference, the center of the inner concave wall of the chamber opening and the center of the side convex wall of the sealing seat are both arranged on the rotating pin.

[0016] Furthermore, as a preference, a first wide flow section, a narrow flow section, and a second wide flow section are sequentially arranged in the jet element along the direction in which the material flows, and the three are connected.

[0017] Further, as a preference, the reciprocating drive mechanism comprises:

[0018] A turntable, which is rotatably mounted in the lower housing, and the turntable is driven by a motor fixed to the rear wall of the lower housing;

[0019] A slider, which is matched and slidably arranged in the sliding cavity at the top of the lower shell, and the slider is rotatably connected to a driving handle rotatably installed on the edge of the turntable;

[0020] A sliding column, which is matched and slidably connected with a sliding groove located on the rear side wall of the lower shell, and one end of the sliding column is fixedly connected to the sliding block;

[0021] And two connecting rod assemblies are provided and both are fixedly connected to the other end of the sliding column, and the driving part of each connecting rod assembly is fixedly connected to the sealing seat.

[0022] Further, as a preference, the connecting rod assembly consists of a moving rod, a fixed column, a first foot rod, a second foot rod and a rubber sleeve, wherein one end of the moving rod is fixedly connected to the sliding column, the other end of the moving rod is fixedly connected to one end of the first foot rod located in front of it by a fixed column, the other end of the first foot rod is rotatably connected to one end of the second foot rod, the other end of the second foot rod extends into the upper shell body and is fixedly connected to the sealing seat, and the second foot rod and the side opening of the upper shell body are sealed by a rubber sleeve.

[0023] Furthermore, preferably, the first foot rod is adaptively telescopically adjustable.

[0024] Further, as a preference, a pressure plug is slidably provided in the mixing chamber, and the pressure plug is fixedly connected to one end of a connecting rod, and the other end of the connecting rod penetrates into the sliding cavity and is fixedly connected to the sliding block.

[0025] The present invention also provides a continuous microchemical preparation method of nano strontium carbonate, which comprises the following steps:

[0026] Step 1: using strontium sulfide as a strontium source and carbon dioxide as a carbon source, pressurizing strontium sulfide into a continuous phase feed port of a premixing mechanism, and pressurizing carbon dioxide into a dispersed phase feed port of a premixing mechanism for premixing;

[0027] Step 2: Inject the pre-mixed gas-liquid mixture into a micro-chemical reactor, adjust the feed rate and reaction temperature of the micro-chemical reactor to set values, obtain a strontium carbonate solution, and then obtain nano-strontium carbonate through extraction and drying processes.

[0028] The present invention adopts the above technology and has the following beneficial effects compared with the existing technology: the device of the present invention adopts a gas-liquid premixing mechanism to premix the reaction materials, the jet parts on the two sealing seats in the gas-liquid premixing mechanism are symmetrically arranged, and Y-shaped impact is performed, and the explosion effect of the impact is used to increase the dispersion rate of molecules such as carbon and strontium, promote the contact rate between the molecules of the two reactants, and thus improve the premixing efficiency;

[0029] Moreover, the two sealing seats can be flipped within a certain angle towards each other or back to back, which can avoid continuous collisions on the one hand, and on the other hand, can realize the collision points of the two fluid substances at different planes, so that the molecules can be distributed in the cavity of the mixing chamber, which is conducive to the mutual contact between gas and liquid molecules and provides a pre-mixing effect for the reaction between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a continuous micro-chemical synthesis device for nano-strontium carbonate;

[0031] Figure 2 The figure is a schematic diagram of the internal structure of the gas-liquid premixing mechanism in the continuous micro-chemical synthesis equipment of nano-strontium carbonate;

[0032] Figure 3 The figure is a schematic diagram of the internal structure of the lower shell of the continuous micro-chemical synthesis equipment of nano-strontium carbonate;

[0033] Figure 4 This is a schematic diagram of the internal structure of the upper shell of the continuous micro-chemical synthesis equipment of nano-strontium carbonate;

[0034] Figure 5 for Figure 4 A magnified schematic diagram of part A;

[0035] Figure 6 Schematic diagram of the internal structure of the jet component in the continuous microchemical synthesis equipment of nano-strontium carbonate.

[0036] In the figure: 1, micro-chemical reactor; 2, second gas-liquid pipe; 3, first gas-liquid pipe; 4, third gas-liquid pipe; 5, gas-liquid pre-mixing mechanism; 6, pressure pipe; 7, continuous phase feed port; 8, dispersed phase feed port; 501, moving rod; 502, driving handle; 503, second foot rod; 504, slider; 505, turntable; 506, first foot rod; 507, lower shell; 508, slide groove; 509, slide cavity; 510, injection channel; 512, plug; 513, rubber sleeve; 514, connecting rod; 515, mixing chamber; 516, upper shell; 517, partition; 518, chamber mouth; 519, sealing seat; 520, jet component; 521, rotating pin; 5201, second wide flow section; 5202, first wide flow section; 5203, narrow flow section. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example: Please refer to the attached Figure 1-6 The present invention provides a technical solution: a continuous micro-chemical synthesis device for nano-strontium carbonate, which comprises:

[0039] The micro-chemical reactor 1 has a third gas-liquid pipe 4 which is sealed and connected to the injection port;

[0040] and a gas-liquid premixing mechanism 5, of which a plurality is provided, the output port of each gas-liquid premixing mechanism 5 is connected to the first gas-liquid pipe 3, and the first gas-liquid pipe 3 and the third gas-liquid pipe 4 are connected by the second gas-liquid pipe 2;

[0041] Among them, each gas-liquid premixing mechanism 5 has a continuous phase feed port 7 for injecting strontium source solution and a dispersed phase feed port 8 for injecting carbon source gas, and the continuous phase feed port 7 and the dispersed phase feed port 8 are connected to a pressure pipe 6, and each pressure pipe 6 is installed with a pressure gauge.

[0042] In this embodiment, the gas-liquid premixing mechanism 5 includes:

[0043] A lower housing 507, in which a reciprocating drive mechanism is installed;

[0044] An upper housing 516, which is sealed and connected to the lower housing 507;

[0045] A mixing chamber 515 is fixed in the upper shell 516. An injection channel 510 is provided between the mixing chamber 515 and the upper shell 516. Both sides of the bottom of the mixing chamber 515 are provided with chamber openings 518 communicating with the injection channel 510.

[0046] There are two sealing seats 519, each of which is sealed by a rotating pin 521 and is movably arranged in two chamber openings 518, and the two sealing seats 519 are driven by a reciprocating driving mechanism to perform reciprocating small-amplitude flipping;

[0047] and a partition 517, which is fixedly connected between the mixing chamber 515 and the upper shell 516, and the partition 517 can separate the injection channel 510 into two parts, and respectively connect the continuous phase feed port 7 and the dispersed phase feed port 8;

[0048] The two sealing seats 519 are always symmetrically arranged, and each sealing seat 519 is provided with a plurality of evenly distributed mounting holes, and a jet component 520 is fixedly installed in each mounting hole;

[0049] Specifically, the jet elements 520 on the two sealing seats 519 are symmetrically arranged and perform Y-shaped impact, using the explosion effect of the impact to increase the dispersion rate of molecules such as carbon and strontium, promote the contact rate between the molecules of the two reactants, and thus improve the premixing efficiency;

[0050] It should also be noted that the two sealing seats 519 can be turned over within a certain angle in opposite directions or opposite directions, which can avoid continuous collisions on one hand, and on the other hand, can realize collision points of two fluid substances at different planes, so that the molecules can be distributed in the cavity of the mixing chamber, which is conducive to the mutual contact of gas and liquid molecules, and provide a pre-mixing effect for the reaction of the two.

[0051] Moreover, since the collision impact force refers to the force exerted by the two reaction substances on each other at the moment of collision, and the magnitude and direction of this force are related to the change in momentum of the object, when the two reaction substances collide, their flow (movement) angle (the angle is not 0°) will affect the collision impact force. Therefore, the reciprocating drive mechanism drives the two sealing seats 519 to flip back and forth, and changes the degree of gas-liquid collision at different planes by changing different jet angles, which has a certain boosting effect on the activity and reactivity of the carbon and strontium molecules in the mixing chamber.

[0052] In this embodiment, the center of the inner concave wall of the chamber opening 518 and the center of the side convex wall of the sealing seat 519 are both set on the rotating pin 521.

[0053] In this embodiment, a first wide flow section 5202, a narrow flow section 5203, and a second wide flow section 5201 are sequentially arranged in the jet element 520 along the direction of the material flow, and the three are connected;

[0054] It should be noted that the cross-sectional area of ​​the narrow flow section 5203 is smaller than the cross-sectional area of ​​the first wide flow section 5202 and the second wide flow section 5201, thereby forming a pressure accumulation effect and improving the jet intensity of the fluid.

[0055] In this embodiment, the reciprocating drive mechanism includes:

[0056] A turntable 505 is rotatably mounted in the lower housing 507, and the turntable 505 is driven by a motor fixed on the rear wall of the lower housing 507;

[0057] A slider 504 is matched and slidably disposed in a slide cavity 509 at the top of a lower housing 507, and the slider 504 is rotatably connected to a driving handle 502 rotatably mounted on the edge of a rotating disk 505;

[0058] A sliding column, which is matched and slidably connected with a sliding groove 508 located on the rear side wall of the lower housing 507, and one end of the sliding column is fixedly connected to the slider 504;

[0059] And there are two connecting rod assemblies, which are fixedly connected to the other end of the sliding column, and the driving part of each connecting rod assembly is fixedly connected to the sealing seat 519.

[0060] In this embodiment, the connecting rod assembly is composed of a moving rod 501, a fixed column, a first foot rod 506, a second foot rod 503 and a rubber sleeve 513, wherein one end of the moving rod 501 is fixedly connected to the sliding column, the other end of the moving rod 501 is fixedly connected to one end of the first foot rod 506 located in front of it by a fixed column, the other end of the first foot rod 506 is rotatably connected to one end of the second foot rod 503, the other end of the second foot rod 503 extends into the upper shell 516 and is fixedly connected to the sealing seat 519, and the second foot rod 503 is sealed and connected to the side opening of the upper shell 516 by a rubber sleeve 513;

[0061] Specifically, when the slider 504 is driven to slide upward, it indirectly drives the first foot rod 506 to move upward through the slide column. At this time, the bottom end of the second foot rod 503 is acted upon by a thrust force, driving the two sealing seats to perform an opposite flipping action.

[0062] When the slider 504 is driven to slide down, it indirectly drives the first foot rod 506 to move downward through the slide column. At this time, the bottom end of the second foot rod 503 is subjected to a pulling force, driving the two sealing seats to perform a back-to-back flipping action.

[0063] In this embodiment, the first foot rod 506 can be adaptively telescopically adjusted, and can provide adaptive space for the connecting rod mechanism when it is deformed.

[0064] In this embodiment, a pressure plug 512 is slidably provided in the mixing chamber 515, and the pressure plug 512 is fixedly connected to one end of a connecting rod 514, and the other end of the connecting rod 514 penetrates into the sliding cavity 509 and is fixedly connected to the slider 504;

[0065] Specifically, the pressure plug 512 is driven to slide up and down reciprocatingly, which can produce an intermittent pressurization effect in the mixing chamber, thereby providing a certain amount of assistance for the movement of molecules.

[0066] The present invention also provides a continuous microchemical preparation method of nano strontium carbonate, which comprises the following steps:

[0067] Step 1: Using strontium sulfide as a strontium source and carbon dioxide as a carbon source, strontium sulfide is pressurized and injected into the continuous phase feed port 7 of the premixing mechanism 5, and carbon dioxide is pressurized and injected into the dispersed phase feed port 8 of the premixing mechanism 5 for premixing;

[0068] Step 2: injecting the pre-mixed gas-liquid mixture into the micro-chemical reactor 1, adjusting the feed rate and reaction temperature of the micro-chemical reactor 1 to the set value, obtaining a strontium carbonate solution, and then obtaining nano-strontium carbonate through extraction and drying processes;

[0069] It should be noted that the raw materials use carbon dioxide as the carbon source, which can help achieve carbon peak and carbon neutrality and improve the resource utilization rate of carbon dioxide.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous micro-chemical synthesis device for nano-strontium carbonate, characterized in that: It includes: A microchemical reactor (1), the injection port of which is sealed and connected to a third gas-liquid pipe (4); and a gas-liquid premixing mechanism (5), wherein a plurality of gas-liquid premixing mechanisms (5) are provided, wherein the output port of each gas-liquid premixing mechanism (5) is connected to the first gas-liquid pipe (3), and the first gas-liquid pipe (3) and the third gas-liquid pipe (4) are connected via the second gas-liquid pipe (2); Each of the gas-liquid premixing mechanisms (5) has a continuous phase feed port (7) for injecting a strontium source solution and a dispersed phase feed port (8) for injecting a carbon source gas, and the continuous phase feed port (7) and the dispersed phase feed port (8) are both connected to a pressure pipe (6), and each of the pressure pipes (6) is equipped with a pressure gauge.

2. The continuous microchemical synthesis equipment of nano-strontium carbonate according to claim 1, characterized in that: The gas-liquid premixing mechanism (5) comprises: A lower housing (507) in which a reciprocating drive mechanism is installed; An upper shell (516) which is sealed and connected to the lower shell (507); A mixing chamber (515) fixed in the upper shell (516), an injection channel (510) being provided between the mixing chamber (515) and the upper shell (516), and chamber openings (518) communicating with the injection channel (510) being provided on both sides of the bottom of the mixing chamber (515); Two sealing seats (519) are provided, each of the sealing seats (519) is sealed by a rotating pin (521) and is movably arranged in the two chamber openings (518), and the two sealing seats (519) are driven by a reciprocating driving mechanism to perform reciprocating small-amplitude flipping; and a partition (517) fixedly connected between the mixing chamber (515) and the upper shell (516), wherein the partition (517) can separate the injection channel (510) into two parts, which are respectively connected to the continuous phase feed port (7) and the dispersed phase feed port (8); The two sealing seats (519) are always arranged symmetrically, and each sealing seat (519) is provided with a plurality of evenly distributed mounting holes, and a jet component (520) is fixedly mounted in each mounting hole.

3. The continuous microchemical synthesis equipment of nano strontium carbonate according to claim 2, characterized in that: The center of the inner concave wall of the chamber opening (518) and the center of the side convex wall of the sealing seat (519) are both arranged on the rotating pin (521).

4. The continuous microchemical synthesis equipment of nano-strontium carbonate according to claim 2, characterized in that: A first wide flow section (5202), a narrow flow section (5203), and a second wide flow section (5201) are sequentially arranged in the jet component (520) and along the direction in which the material flows, and the three are connected.

5. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 2, characterized in that: The reciprocating drive mechanism comprises: A turntable (505) is rotatably mounted in the lower housing (507), and the turntable (505) is driven by a motor fixed to the rear wall of the lower housing (507); A sliding block (504) is matched and slidably disposed in a sliding cavity (509) at the top of the lower housing (507), and the sliding block (504) is rotatably connected to a driving handle (502) rotatably mounted on the edge of the rotating disk (505); A sliding column, which is matched and slidably connected with a sliding groove (508) located on the rear side wall of the lower shell (507), and one end of the sliding column is fixedly connected to the sliding block (504); And two connecting rod assemblies are provided and are both fixedly connected to the other end of the sliding column, and the driving part of each connecting rod assembly is fixedly connected to the sealing seat (519).

6. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 5, characterized in that: The connecting rod assembly is composed of a moving rod (501), a fixed column, a first foot rod (506), a second foot rod (503) and a rubber sleeve (513), wherein one end of the moving rod (501) is fixedly connected to the sliding column, the other end of the moving rod (501) is fixedly connected to one end of the first foot rod (506) located in front of it by using a fixed column, the other end of the first foot rod (506) is rotatably connected to one end of the second foot rod (503), the other end of the second foot rod (503) extends into the upper shell (516) and is fixedly connected to the sealing seat (519), and the second foot rod (503) and the side opening of the upper shell (516) are sealed by using a rubber sleeve (513).

7. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 6, characterized in that: The first foot rod (506) is adaptively telescopic and adjustable.

8. The continuous microchemical synthesis equipment of nano-strontium carbonate according to claim 5, characterized in that: A pressure plug (512) is provided in the mixing chamber (515) for matching sliding connection, and the pressure plug (512) is fixedly connected to one end of a connecting rod (514), and the other end of the connecting rod (514) penetrates into the sliding cavity (509) and is fixedly connected to the sliding block (504).

9. A continuous microchemical preparation method for nano-strontium carbonate, characterized in that: It includes the following steps: Step 1: using strontium sulfide as a strontium source and carbon dioxide as a carbon source, simultaneously pressurizing strontium sulfide and injecting it into a continuous phase feed port (7) of a premixing mechanism (5), and pressurizing carbon dioxide and injecting it into a dispersed phase feed port (8) of a premixing mechanism (5) for premixing; Step 2: The pre-mixed gas-liquid mixture is injected into the micro-chemical reactor (1), and the feed rate and reaction temperature of the micro-chemical reactor (1) are adjusted to set values ​​to obtain a strontium carbonate solution, and then nano-strontium carbonate is obtained through extraction and drying steps.

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