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

Abstract

The application discloses a continuous microchemical synthesis device and a preparation method of nano strontium carbonate, which comprises a microchemical reactor, a third gas-liquid pipe is sealed and communicated with a feeding port of the microchemical reactor, and a plurality of gas-liquid premixing mechanisms are arranged, an output port of each gas-liquid premixing mechanism is communicated with a first gas-liquid pipe, and a second gas-liquid pipe is arranged between the first gas-liquid pipe and the third gas-liquid pipe. The device adopts the gas-liquid premixing mechanism to premix the reactants, the two jet elements on the two sealing seats of the gas-liquid premixing mechanism are symmetrically arranged and Y-shaped impact is formed, the dispersion rate of carbon molecules, strontium molecules and the like is improved by the explosion effect of the impact, the contact rate between the molecules of the two reactants is promoted, and the premixing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nano-strontium carbonate production, in particular to a continuous micro-chemical synthesis equipment and preparation method for nano-strontium carbonate. BACKGROUND

[0002] In the continuous micro-chemical synthesis equipment, due to the flow characteristics of the fluid and the size limitation of the micro-channel, the mixing uniformity of the reactants may be difficult to achieve the ideal state. Although the micro-chemical equipment generally has high mass transfer and heat transfer efficiency, for the synthesis of nano-strontium carbonate which is a process with relatively strict requirements on reaction conditions, slight mixing non-uniformity may cause problems such as wide particle size distribution and irregular morphology of the product. In the existing micro-chemical equipment, only the flow speed of the fluid in the micro-channel driven by pressure can be used to improve the production quality, and flexible adjustment like large stirred tanks and other equipment is difficult, so there are certain obstacles to the continuous production of nano-strontium carbonate. SUMMARY

[0003] Therefore, the present application proposes a continuous micro-chemical synthesis equipment and preparation method for nano-strontium carbonate to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a continuous micro-chemical synthesis equipment for nano-strontium carbonate, comprising:

[0005] a micro-chemical reactor, a third gas-liquid pipe being sealingly communicated with the injection port of the micro-chemical reactor;

[0006] and a plurality of gas-liquid premixing mechanisms, the output port of each gas-liquid premixing mechanism being in communication with the first gas-liquid pipe, and the first gas-liquid pipe and the third gas-liquid pipe being in communication through a second gas-liquid pipe;

[0007] wherein each gas-liquid premixing mechanism has a continuous phase feed port for injecting a strontium source solution and a dispersed phase feed port for injecting a carbon source gas, and a pressure pipe is communicated with each of the continuous phase feed port and the dispersed phase feed port, and a pressure gauge is installed on each pressure pipe.

[0008] Further, as a preferred embodiment, the gas-liquid premixing mechanism comprises:

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

[0010] an upper housing sealingly connected with the lower housing;

[0011] a mixing chamber fixed in the upper housing, an injection channel being provided between the mixing chamber and the upper housing, and chamber openings being provided on both sides of the bottom of the mixing chamber and in communication with the injection channel;

[0012] two sealing seats, each of which is arranged movably in the two chamber openings by a rotating pin seal and is driven by a reciprocating driving mechanism to reciprocate in a small range;

[0013] a partition fixedly connected between the mixing chamber and the upper shell, which divides the injection channel into two parts and respectively communicates with the continuous phase inlet and the dispersed phase inlet;

[0014] wherein the two sealing seats are always arranged symmetrically, each of which is provided with a plurality of uniformly distributed mounting holes, and each of which is fixedly installed with a jet element.

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

[0016] Further, as a preferred, the jet element is provided with a first wide flow section, a narrow flow section and a second wide flow section in sequence along the direction of the material flow, and the three are communicated.

[0017] Further, as a preferred, the reciprocating driving mechanism comprises:

[0018] a rotating disc rotatably installed in the lower shell, and the rotating disc is driven by a motor fixed on the rear wall of the lower shell;

[0019] a sliding block slidingly arranged in the sliding cavity on the top of the lower shell, and the sliding block is rotatably connected with a driving handle rotatably installed at the edge of the rotating disc;

[0020] a sliding column slidingly connected with a sliding groove on the rear side wall of the lower shell, and one end of the sliding column is fixedly connected with the sliding block;

[0021] and a link assembly, which is provided with two and is fixedly connected with the other end of the sliding column, and the driving part of each link assembly is fixedly connected with the sealing seat.

[0022] Further, as a preferred, the link assembly is composed 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 with the sliding column, the other end of the moving rod is fixedly connected with one end of the first foot rod in front of it by a fixed column, the other end of the first foot rod is rotatably connected with one end of the second foot rod, the other end of the second foot rod extends into the upper shell and is fixedly connected with the sealing seat, and the second foot rod and the side opening of the upper shell are sealingly connected by a rubber sleeve.

[0023] Further, as a preferred, the first foot rod can be self-adaptively adjusted in length.

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

[0025] The application also provides a continuous micro-chemical preparation method of nano-strontium carbonate, which comprises the following steps:

[0026] Step 1: taking strontium sulfide as a strontium source and carbon dioxide as a carbon source, the strontium sulfide is pressurized and injected into a continuous phase feeding port of a gas-liquid pre-mixing mechanism, and the carbon dioxide is pressurized and injected into a dispersed phase feeding port of the gas-liquid pre-mixing mechanism for pre-mixing;

[0027] Step 2: the pre-mixed gas-liquid mixture is injected into a micro-chemical reactor, the feeding speed and the reaction temperature of the micro-chemical reactor are adjusted to a set value, strontium carbonate solution is prepared, and then nano-strontium carbonate is prepared through extraction and drying processes.

[0028] Compared with the prior art, the application has the following beneficial effects: the device adopts a gas-liquid pre-mixing mechanism to pre-mix the reactants, the two jet elements on the two sealing seats in the gas-liquid pre-mixing mechanism are symmetrically arranged and Y-shaped impingement is performed, the dispersion rate of carbon molecules and strontium molecules is improved by using the explosion effect of impingement, the contact rate between the molecules of the two reactants is promoted, and the pre-mixing efficiency is improved.

[0029] Moreover, the two sealing seats can be turned within a certain angle in a facing or opposite direction, on the one hand, the continuous impingement is avoided, and on the other hand, the impingement points of the two fluid substances in different planes can be realized, the molecules can be distributed in the chamber of the mixing chamber, the mutual contact of the gas and liquid molecules is facilitated, and the pre-mixing effect is provided for the reaction of the two substances. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the continuous micro-chemical synthesis equipment of nano-strontium carbonate.

[0031] Figure 2 It is an internal structural schematic diagram of the gas-liquid pre-mixing mechanism in the continuous micro-chemical synthesis equipment of nano-strontium carbonate.

[0032] Figure 3 It is an internal structural schematic diagram of the lower shell in the continuous micro-chemical synthesis equipment of nano-strontium carbonate.

[0033] Figure 4 It is an internal structural schematic diagram of the upper shell in the continuous micro-chemical synthesis equipment of nano-strontium carbonate.

[0034] Figure 5 It is Figure 4 It is an enlarged schematic diagram of part A in the figure.

[0035] Figure 6 It is an internal structure diagram of the jet element in the continuous micro-chemical 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 premixing mechanism; 6, pressure pipe; 7, continuous phase feeding port; 8, dispersed phase feeding port; 501, moving rod; 502, driving handle; 503, second foot rod; 504, sliding block; 505, rotating disc; 506, first foot rod; 507, lower housing; 508, sliding groove; 509, sliding cavity; 510, injection channel; 512, compression plug; 513, rubber sleeve; 514, connecting rod; 515, mixing chamber; 516, upper housing; 517, partition; 518, chamber opening; 519, sealing seat; 520, jet element; 521, rotating pin; 5201, second wide flow section; 5202, first wide flow section; 5203, narrow flow section. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] Embodiment: Please refer to the drawings in the embodiments of the present application Figures 1-6 The present application provides a technical solution: a continuous micro-chemical synthesis equipment of nano-strontium carbonate, which comprises:

[0039] The micro-chemical reactor 1 is sealed and communicated with the third gas-liquid pipe 4 at the injection port;

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

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

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

[0043] The reciprocating driving mechanism is installed in the lower housing 507;

[0044] The upper housing 516 is sealingly connected with the lower housing 507;

[0045] A mixing chamber 515 is fixed in the upper shell 516, and an injection channel 510 is arranged between the mixing chamber 515 and the upper shell 516. Two chamber openings 518 are arranged at the bottom of the mixing chamber 515 and communicate with the injection channel 510.

[0046] Two sealing seats 519 are arranged, each of which is sealed by a rotating pin 521 and movably arranged in the two chamber openings 518. The two sealing seats 519 are driven by a reciprocating driving mechanism to reciprocate and overturn slightly.

[0047] A partition 517 is fixedly connected between the mixing chamber 515 and the upper shell 516. The partition 517 can divide the injection channel 510 into two parts and respectively communicate with the continuous phase inlet 7 and the dispersed phase inlet 8.

[0048] The two sealing seats 519 are always arranged symmetrically. A plurality of uniformly distributed mounting holes are arranged on each sealing seat 519. A plurality of jet elements 520 are fixedly arranged in the mounting holes.

[0049] Specifically, the jet elements 520 on the two sealing seats 519 are arranged symmetrically and impact each other in a Y shape. The impact effect is used to improve the dispersion rate of carbon and strontium molecules, promote the contact rate between the molecules of the two reactants, and thus improve the premixing efficiency.

[0050] It should be noted that the two sealing seats 519 can be overturned within a certain angle in the opposite direction or the same direction. On the one hand, it avoids continuous impact. On the other hand, it can realize the impact point of the two fluid substances in different planes, so that the molecules can be distributed in the chamber of the mixing chamber, which is beneficial to the mutual contact of the gas and liquid molecules and provides a premixing effect for the reaction of the two substances.

[0051] In addition, the collision impact force refers to the force of interaction between the two reactants at the moment of collision. The size and direction of the force are related to the change of the momentum of the object. Therefore, when the two reactants collide, the angle (the angle is not 0°) of the flow (motion) of the two reactants will affect the collision impact force. Therefore, the reciprocating driving mechanism drives the two sealing seats 519 to reciprocate and overturn. By changing the jet angle, the degree of gas-liquid impact in different planes is changed, which has a certain assistance effect on the activity and reaction rate of carbon and strontium molecules in the mixing chamber.

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

[0053] In this embodiment, the jet element 520 is sequentially provided with a first wide flow section 5202, a narrow flow section 5203, and a second wide flow section 5201 along the direction of the flow of the substance, and the three are in communication.

[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, so as to form a pressure accumulation effect and improve the jetting strength of the fluid.

[0055] In the embodiment, the reciprocating driving mechanism comprises:

[0056] a rotating disc 505 rotatably installed in the lower shell 507, and the rotating disc 505 is driven by a motor fixed on the rear wall of the lower shell 507;

[0057] a sliding block 504 slidingly arranged in a sliding cavity 509 on the top of the lower shell 507, and the sliding block 504 is rotatably connected with a driving handle 502 rotatably installed at the edge of the rotating disc 505;

[0058] a sliding column slidingly matched with a sliding groove 508 on the rear wall of the lower shell 507, and one end of the sliding column is fixedly connected with the sliding block 504;

[0059] and a linkage assembly provided with two and fixedly connected with the other end of the sliding column, and the driving part of each linkage assembly is fixedly connected with the sealing seat 519.

[0060] In the embodiment, the linkage 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 with the sliding column, the other end of the moving rod 501 is fixedly connected with one end of the first foot rod 506 in front of the moving rod 501 by the fixed column, the other end of the first foot rod 506 is rotatably connected with 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 with the sealing seat 519, and the rubber sleeve 513 is sealingly connected between the second foot rod 503 and the side opening of the upper shell 516;

[0061] Specifically, when the sliding block 504 is driven to slide upward, it indirectly drives the first foot rod 506 to move upward through the sliding column, at this time, the bottom end of the second foot rod 503 is subjected to a pushing force to drive the two sealing seats to perform a reverse flipping action;

[0062] When the sliding block 504 is driven to slide downward, it indirectly drives the first foot rod 506 to move downward through the sliding column, at this time, the bottom end of the second foot rod 503 is subjected to a pulling force to drive the two sealing seats to perform a reverse flipping action.

[0063] In the embodiment, the first foot rod 506 can be self-adaptively adjusted in length, so as to provide an adaptive space for the deformation of the linkage mechanism.

[0064] In the embodiment, the matching sliding in the mixing chamber 515 is provided with a pressure plug 512, and the pressure plug 512 is fixedly connected with one end of the connecting rod 514, and the other end of the connecting rod 514 penetrates into the sliding cavity 509 and is fixedly connected with the sliding block 504.

[0065] Specifically, the pressure plug 512 is driven to reciprocatingly slide up and down, and can intermittently pressurize the mixing chamber cavity, thereby providing certain assistance for intermolecular movement.

[0066] The application also provides a continuous micro-chemical preparation method of nano-strontium carbonate, which comprises the following steps:

[0067] Step 1: taking strontium sulfide as a strontium source and carbon dioxide as a carbon source, the strontium sulfide is pressurized and injected into the continuous phase feeding port 7 of the gas-liquid premixing mechanism 5, and the carbon dioxide is pressurized and injected into the dispersed phase feeding port 8 of the gas-liquid premixing mechanism 5, and then premixing is carried out;

[0068] Step 2: the premixed gas-liquid mixture is injected into the micro-chemical reactor 1, the feeding speed and the reaction temperature of the micro-chemical reactor 1 are adjusted to the set values, strontium carbonate solution is prepared, and then nano-strontium carbonate is prepared through extraction and drying processes;

[0069] It should be noted that the raw material takes carbon dioxide as a carbon source, which can help carbon peak carbon neutralization and improve the utilization rate of carbon dioxide resources.

[0070] Although the embodiments of the application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. Continuous micro-chemical synthesis equipment for nano-strontium carbonate, characterized in that: It includes: The micro-chemical reactor has a material injection port which is sealed and connected to a third gas-liquid pipe; A plurality of gas-liquid pre-mixing mechanisms are provided, wherein the output port of each gas-liquid pre-mixing mechanism 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; Each gas-liquid premixing mechanism has a continuous phase feed port for injecting a strontium source solution and a dispersed phase feed port for injecting a carbon source gas, and the continuous phase feed port and the dispersed phase feed port are both connected to a pressure pipe, and each pressure pipe is installed with a pressure gauge; The gas-liquid premixing mechanism includes: a lower housing in which a reciprocating drive mechanism is mounted; an upper shell, which is sealed with the lower shell; 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; There are two sealing seats, each of which is sealed with a rotating pin and is movably arranged in the two chamber openings. Both sealing seats are driven by a reciprocating drive mechanism to perform reciprocating small-amplitude flipping; A partition is fixedly connected between the mixing chamber and the upper shell, and the partition can separate the injection channel into two parts, which are connected to the continuous phase feed port and the dispersed phase feed port respectively; The two sealing seats are always symmetrically arranged, and each sealing seat is provided with a plurality of evenly distributed mounting holes, and a jet component is fixedly installed in each mounting hole; The reciprocating drive mechanism includes: A turntable is rotatably mounted in the lower housing and driven by a motor fixed to the rear wall of the lower housing; A slider is slidably mounted in a sliding cavity at the top of the lower housing, and is rotatably connected to a driving handle rotatably mounted on the edge of the turntable; A sliding column is matched and slidably connected with a sliding groove located on the rear side wall of the lower housing, and one end of the sliding column is fixedly connected to the slider; There are two connecting rod assemblies, each of which is 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; The connecting rod assembly consists of a moving rod, a fixed column, a first leg rod, a second leg rod and a rubber sleeve, wherein one end of the moving rod is fixedly connected to the sliding column, and the other end of the moving rod is fixedly connected to one end of the first leg rod located in front of it by a fixed column. The other end of the first leg rod is rotatably connected to one end of the second leg rod, and the other end of the second leg rod extends into the upper shell and is fixedly connected to the sealing seat, and the second leg rod and the side opening of the upper shell are sealed with a rubber sleeve.

2. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 1, characterized in that: 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.

3. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 1, characterized in that: A first wide flow section, a narrow flow section and a second wide flow section are sequentially arranged in the jet component along the direction of material flow, and the three are connected.

4. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 1, characterized in that: The first leg rod can be adaptively telescopically adjusted.

5. The continuous micro-chemical synthesis equipment of nano-strontium carbonate according to claim 1, characterized in that: A pressure plug is provided in the mixing chamber for matching sliding. The pressure plug is fixedly connected to one end of the connecting rod. The other end of the connecting rod penetrates into the sliding cavity and is fixedly connected to the sliding block.

6. A continuous microchemical preparation method for nano-strontium carbonate, using the continuous microchemical synthesis equipment for nano-strontium carbonate according to any one of claims 1 to 5, characterized in that: The following steps are involved: 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 of the gas-liquid premixing mechanism, and carbon dioxide is pressurized and injected into the dispersed phase feed port of the gas-liquid premixing mechanism for premixing; Step 2: The pre-mixed gas-liquid mixture is injected into a micro-chemical reactor, and the feed rate and reaction temperature of the micro-chemical reactor are adjusted to the set values ​​to obtain a strontium carbonate solution, which is then extracted and dried to obtain nano-strontium carbonate.

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