Gas inlet member of a gas-liquid rapid reaction crystallizer and the crystallizer

Abstract

The application discloses a gas inlet component of a gas-liquid rapid reaction crystallizer and the crystallizer. The gas inlet component comprises three parts of an inner cylinder, a middle cylinder and an outer cylinder. The top of the inner cylinder is connected with a gas inlet pipe, and the bottom of the inner cylinder is provided with an inner cylinder gas outlet. The middle cylinder is sleeved outside the inner cylinder, a protective liquid inlet pipe is arranged in the gap between the middle cylinder and the inner cylinder, and the protective liquid inlet pipe extends to the inner cylinder gas outlet. The bottom of the middle cylinder is contracted into a baffle funnel, and the bottom of the baffle funnel is provided with a crystal discharge valve. The outer cylinder is invertedly sleeved outside the middle cylinder, the inner cylinder and the protective liquid inlet pipe pass through the top of the outer cylinder, and the passing position is sealed. The gas-liquid contact occurs above the liquid surface of the reaction liquid body, the contact area is large and controllable, the crystallization speed is prevented from being too fast due to too violent reaction, and the solid is prevented from adhering to the gas outlet. The solvent is used to isolate the gas outlet and the reaction liquid body, the gas phase is discontinuous, crystallization blocking of the pipe mouth is avoided, and the stable gas-liquid reaction crystallization process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of gas-liquid quick reaction crystallizer gas inlet components and crystallizer, it is applied to the process of gas quick consumption while having solid generation, including chemical engineering, biological engineering, pharmaceutical, relevant process in environmental protection. BACKGROUND

[0002] In the traditional gas-liquid reaction crystallization process, gas is generally contacted with liquid by bubbling below liquid level or directly contacting liquid above liquid level.In bubbling below liquid level, since gas is quickly dissolved in liquid phase, reaction crystallization quickly generates solid, which can block gas outlet, resulting in poor gas-liquid contact effect, even backflow or blockage, affecting production. SUMMARY

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a kind of gas-liquid quick reaction crystallizer gas inlet components and crystallizer.

[0004] A kind of gas-liquid quick reaction crystallizer gas inlet components, including inner cylinder, middle cylinder, outer cylinder three parts;The top of inner cylinder is connected to gas inlet pipe, and the bottom of inner cylinder is provided with inner cylinder gas outlet;Middle cylinder is sleeved on the outer of inner cylinder, and the gap area of middle cylinder, inner cylinder is provided with a protective liquid input pipe, which extends to the inner cylinder gas outlet, the bottom of middle cylinder is contracted into a baffle hopper, and the bottom of baffle hopper is provided with crystal discharge valve;Outer cylinder is inverted in the outer of middle cylinder, and inner cylinder and protective liquid input pipe pass through the top of outer cylinder, and the passing place is sealed.

[0005] The lower end of the protective liquid input pipe is flush with the height of the inner cylinder gas outlet.

[0006] The middle cylinder is provided with a wall thickness detector, which is an ultrasonic thickness sensor, a capacitive thickness sensor or a microwave thickness sensor.

[0007] The lower part of the middle cylinder is provided with an oscillator for removing solid blockage;The oscillator is an ultrasonic generator, an electromagnetic oscillator or a mechanical oscillator, which is installed on the outer surface or inner surface of the middle cylinder.

[0008] The inner cylinder gas outlet is a porous gas distribution pipe, an open gas pipe, a sand core gas outlet or a gas outlet covered with a gas permeable membrane.

[0009] The crystal discharge valve is a remotely controlled electromagnetic valve or pneumatic valve.

[0010] A gas-liquid rapid reaction crystallizer using the gas inlet component comprises a stirring motor, a liquid reactant inlet pipe, a crystallizer jacket, a crystallizer shell, a gas inlet component, and a stirring paddle; the stirring motor is located at the top of the crystallizer shell, one end of the stirring paddle is connected to the stirring motor, and the other end is located inside the crystallizer; the main body of the gas inlet component is located inside the crystallizer, and the air inlet pipe and the protective liquid input pipe of the gas inlet component respectively pass through the crystallizer shell; one end of the liquid reactant inlet pipe is located outside the crystallizer, and the other end is located inside the crystallizer; a slurry outlet pipe is provided at the bottom of the crystallizer; the crystallizer jacket surrounds the middle and lower part of the crystallizer shell, the interior of the crystallizer jacket is filled with circulating heat transfer medium, the upper part of the crystallizer jacket is provided with a circulating cooling medium outlet, the lower part of the crystallizer jacket is provided with a circulating cooling medium inlet, and the interior is filled with circulating heat transfer medium.

[0011] Beneficial effects of the present invention:

[0012] 1) The gas is pre-mixed and dispersed with the solvent, and the contact between the gas and the reaction liquid occurs in the annular gap, with a large contact area and sufficient reaction.

[0013] 2) The gas flows out from the outlet and contacts the liquid phase of the reaction crystallizer after passing through the solvent buffer barrier, avoiding direct contact that may cause violent reaction, unstable speed and other problems.

[0014] 3) Control the reaction to occur on the liquid surface to avoid abnormal phenomena such as backflow.

[0015] 4) A wall thickness detector and oscillator can be installed to ensure timely cleaning and dredging under abnormal working conditions to avoid serious blockage affecting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a gas-liquid rapid reaction crystallizer;

[0017] In the figure: stirring motor 1, liquid reactant inlet pipe 2, circulating cooling medium outlet 3, crystallizer jacket 4, circulating cooling medium inlet 5, crystallizer shell 6, gas inlet component 7, stirring paddle 8, slurry outlet pipe 9.

[0018] Figure 2 A schematic diagram of the structure of a gas inlet component of a gas-liquid rapid reaction crystallizer;

[0019] In the figure: air inlet pipe 71, outer cylinder 72, middle cylinder 73, wall thickness detector 74, oscillator 75, deflection funnel 76, protective liquid input pipe 77, inner cylinder 78, overflow area 79, gas-liquid contact reaction area 710, bubble dispersion area 711, inner cylinder air outlet 712, crystal discharge valve 713. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the gas-liquid rapid reaction crystallizer includes a stirring motor 1, a liquid reactant inlet pipe 2, a crystallizer jacket 4, a crystallizer shell 6, a gas inlet member 7, and a stirring paddle 8. The stirring motor 1 is located on the top of the crystallizer shell 6, and one end of the stirring paddle 8 is connected to the stirring motor 1, and the other end is located inside the crystallizer.

[0022] The main body of the gas inlet component 7 is located inside the crystallizer, and is partially located below the liquid surface when in use. The gas inlet pipe and the protective liquid input pipe of the gas inlet component 7 respectively pass through the crystallizer shell 6.

[0023] One end of the liquid reactant inlet pipe 2 is located outside the crystallizer, and the other end is located inside the crystallizer and below the liquid level.

[0024] A slurry outlet pipe 9 is provided at the bottom of the crystallizer.

[0025] The crystallizer jacket 4 surrounds the middle and lower part of the crystallizer shell 6. The interior of the crystallizer jacket 4 is filled with circulating heat transfer medium. The upper part of the crystallizer jacket 4 is provided with a circulating cooling medium outlet 3, the lower part is provided with a circulating cooling medium inlet 5, and the interior is filled with circulating heat transfer medium.

[0026] like Figure 2 As shown, a gas inlet component of a gas-liquid rapid reaction crystallizer includes an inner cylinder 78, a middle cylinder 73, and an outer cylinder 72; the gas inlet component is a relatively independent and replaceable functional unit that can be used in Figure 1 Different crystallizers or reactors are shown. Conversely, different gas inlet components can be used in the crystallizer or reactor. The top of the inner cylinder 78 is connected to the air inlet pipe 71, and the bottom of the inner cylinder is provided with an inner cylinder outlet 712. The middle cylinder 73 is sleeved outside the inner cylinder. A protective liquid inlet pipe 77 is provided in the gap between the middle and inner cylinders and extends into the inner cylinder outlet 712. The bottom of the middle cylinder 73 is contracted to form a deflecting funnel 76, and the bottom of the deflecting funnel is provided with a crystal discharge valve 713.

[0027] The outer cylinder 72 is inverted and placed outside the middle cylinder 73. The inner cylinder 78 and the protective liquid inlet pipe 77 extend through the top of the outer cylinder and are sealed at the intersection. During operation, the upper edge of the middle cylinder is above the liquid level in the crystallizer or reactor, while the downward-facing opening of the outer cylinder is submerged below the reactor liquid level, ensuring full contact between the gas and the liquid. After the protective liquid and gas mix in the middle cylinder's bubbling dispersion zone 711, they flow upward under the action of gas pressure through the overflow zone 79, out of the middle cylinder opening, and downward into the outer cylinder, forming a gas-liquid contact reaction zone 710. In this gas-liquid contact reaction zone, the overflowing gas-liquid mixture comes into surface contact with the bulk of the reaction liquid, where the gas is consumed by the reaction and the liquid (solvent) mixes with the bulk of the reaction liquid. Produced solid crystals settle within the annular gap of the gas-liquid contact reaction zone 710 and flow out of the gas inlet assembly.

[0028] The lower end of the protective liquid input pipe 77 can be flush with the inner cylinder air outlet 712.

[0029] Figure 2 In the middle tube 73, a wall thickness detector 74 is provided, which can be an ultrasonic thickness sensor, a capacitive thickness sensor or a microwave thickness sensor.

[0030] An oscillator 75 is provided at the lower portion of the middle cylinder 73 for removing solid blockages. The oscillator is an ultrasonic generator, an electromagnetic oscillator or a mechanical oscillator, and is installed on the outer surface or the inner surface of the middle cylinder.

[0031] The inner cylinder air outlet 712 is a porous cloth air pipe, an open air pipe, a sand core air outlet, or an air outlet covered with a breathable membrane.

[0032] The crystal discharge valve 713 is a remotely controlled electromagnetic valve or pneumatic valve, used to discharge the cleaned crystals.

[0033] Application Examples

[0034] Before the gas and liquid flow through the gas inlet components, in addition to the pressure regulating and metering functions such as pumps, flow meters, and pressure-stabilizing valves, there should be components such as check valves to prevent back suction and backflow.

[0035] Before the reaction, the liquid reactants are injected into the reactor to the appropriate liquid level, and the reaction solvent is continuously introduced through the protective liquid inlet pipe 77, and the solvent level is controlled to always be at the height of the overflow zone 79. The gas reactants are introduced from the air inlet pipe 71, and the gas in the inner tube flows from top to bottom. After the gas bulges out from the hole or membrane, it contacts and mixes with the solvent in the middle tube. The solvent input from the protective liquid inlet pipe 77 in the middle tube flows from bottom to top, overflows at the top of the middle tube, and enters the reactor or crystallizer liquid phase. The gas overflows from the top of the middle tube, flows from top to bottom in the gap between the middle tube and the outer tube under the pressure, contacts the liquid phase in the reactor at the middle and lower part of the outer tube, reacts and is consumed, and the generated solids fall into the liquid phase and are carried away by the flowing reaction liquid. Because the gas reactants and liquid reactants are separated by the protective liquid and cannot directly contact each other, the reaction will not be too intense, resulting in the generation of a large amount of solids and blocking the pipeline. When the boiling point of the liquid reactant is low, the volatile liquid reactant is vaporized by heat and enters the gas-liquid contact reaction zone 710 or the overflow zone 79, and reacts on the inner and outer walls of the middle cylinder 73 and the inner wall of the outer cylinder 72 to generate solid deposits. After a period of time, the cross-sectional area of ​​the annular gap on both sides of the middle cylinder 73 will be reduced, affecting the gas circulation. The wall thickness is monitored in real time by the wall thickness detector 74. When the wall thickness exceeds the set value, the oscillator 75 is turned on to make the formed deposits break and fall under the action of mechanical waves. At the same time, the crystal discharge valve 713 is opened to increase the flow rate of the protective liquid from the protective liquid inlet pipe 77, and flush the solids in the middle cylinder 73 through the crystal discharge valve 713 to avoid serious blockage affecting production.

[0036] A liquid seal is maintained in the middle cylinder 73. The liquid seal uses a liquid that does not react with the gas in the inner cylinder or has a low solubility. It is generally a solvent for reaction or crystallization. The height of the liquid seal is ensured to be higher than the gas outlet of the inner cylinder. The gas-liquid flow rate is controlled. The gas flow rate in the inner cylinder should match the consumption rate in the liquid phase of the reactor. The solvent flow rate in the middle cylinder should ensure that the gas outlet of the inner cylinder can always be immersed. When the liquid in the reactor flows into the middle cylinder due to improper operation, and the gas reaction crystals adhere to the inner cylinder 78, the wall thickness of the inner cylinder changes. At this time, the reaction can be suspended, the crystal discharge valve 713 at the bottom of the inner cylinder is opened, the oscillator 75 is turned on to crush the crystals, the solvent flow is increased for flushing, and after unblocking, the crystal discharge valve and oscillator are closed to resume normal production.

Claims

1. A gas inlet component for a gas-liquid rapid reaction crystallizer, characterized in that: The invention comprises an inner tube (78), a middle tube (73), and an outer tube (72); the top of the inner tube (78) is connected to the air inlet pipe (71), and the bottom of the inner tube is provided with an inner tube air outlet (712); the middle tube (73) is sleeved outside the inner tube, and a protective liquid input pipe (77) is provided in the gap area between the middle tube and the inner tube, extending into the inner tube air outlet (712); the bottom of the middle tube (73) is contracted into a deflection funnel (76), and the bottom of the deflection funnel is provided with a crystal discharge valve (713); the outer tube (72) is buckled outside the middle tube (73), and the inner tube (78) and the protective liquid input pipe (77) pass through the top of the outer tube, and the passing part is sealed; The lower end of the protective liquid input pipe (77) is flush with the inner cylinder air outlet (712); The middle cylinder (73) is provided with a wall thickness detector (74), which is an ultrasonic thickness sensor, a capacitance thickness sensor, or a microwave thickness sensor.

2. The gas inlet member according to claim 1, wherein An oscillator (75) is provided at the lower portion of the middle cylinder (73) for removing solid blockage; the oscillator is an ultrasonic generator, an electromagnetic oscillator or a mechanical oscillator, and is installed on the outer surface or the inner surface of the middle cylinder.

3. The gas inlet member according to claim 1, wherein The inner cylinder air outlet (712) is a porous cloth air pipe, an open air pipe, a sand core air outlet, or an air outlet covered with a breathable membrane.

4. The gas inlet member according to claim 1, wherein The crystal discharge valve (713) is a solenoid valve or a pneumatic valve that can be remotely controlled.

5. A gas-liquid rapid reaction crystallizer using the gas inlet component according to claim 1, characterized in that: The invention comprises a stirring motor (1), a liquid reactant inlet pipe (2), a crystallizer jacket (4), a crystallizer shell (6), a gas inlet component (7), and a stirring paddle (8); the stirring motor (1) is located at the top of the crystallizer shell (6); one end of the stirring paddle (8) is connected to the stirring motor (1), and the other end is located inside the crystallizer; the main body of the gas inlet component (7) is located inside the crystallizer, and the gas inlet pipe and the protective liquid input pipe of the gas inlet component (7) respectively pass through the crystallizer shell (6); one end of the liquid reactant inlet pipe (2) is located outside the crystallizer, and the other end is located inside the crystallizer; a slurry outlet pipe (9) is provided at the bottom of the crystallizer; the crystallizer jacket (4) surrounds the middle and lower part of the crystallizer shell (6); the interior of the crystallizer jacket (4) is filled with a circulating heat transfer medium; the upper part of the crystallizer jacket (4) is provided with a circulating cooling medium outlet (3), the lower part is provided with a circulating cooling medium inlet (5), and the interior is filled with a circulating heat transfer medium.

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