Continuous extraction and recovery device for ranitidine alkali reaction liquid

Abstract

The utility model discloses a continuous extraction and recovery device for ranitidine alkali reaction liquid. The continuous extraction and recovery device comprises a continuous extractor, a ranitidine alkali reaction liquid adding system, a sinking liquid treatment system and a floating liquid treatment system. The ranitidine alkali reaction liquid adding system is communicated with the continuous extractor through a reaction liquid injection pipe so as to add ranitidine alkali reaction liquid into the continuous extractor. And the sinking liquid treatment system is used for receiving the sinking liquid, separating an extracting agent from a specific solute in a distillation manner, and re-injecting the extracting agent into the continuous extractor. And the floating liquid treatment system is used for receiving the floating liquid and separating impurities in manners of distillation, crystallization and centrifugation so as to obtain crystallized ranitidine alkali. And the floating liquid treatment system is communicated with the continuous extractor through a floating liquid receiving pipe. Compared with the prior art, the continuous extraction and recovery device disclosed by the utility model can realize continuous extraction and recovery of ranitidine alkali reaction liquid and improve the extraction efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to ranitidine base reaction liquid recovery technical field, especially to a kind of ranitidine base reaction liquid continuous extraction recovery device. BACKGROUND

[0002] In prior art, the recovery device of ranitidine base reaction liquid is usually intermittent extraction and intermittent distillation device, and each extraction and distillation process depends on the operation of staff, and the working efficiency of such recovery device is low. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of ranitidine base reaction liquid continuous extraction recovery device, for realizing the continuous extraction and recovery of ranitidine base reaction liquid.

[0004] To achieve the above object, the utility model provides the following scheme:

[0005] The utility model discloses a kind of ranitidine base reaction liquid continuous extraction recovery device, comprising:

[0006] Continuous extractor, extractant and ranitidine base reaction liquid are extracted in the continuous extractor, and sinking liquid and floating liquid are obtained;The floating liquid is the solution after the removal of specific solute of the ranitidine base reaction liquid, and the sinking liquid is the mixture of the extractant and the specific solute;

[0007] Ranitidine base reaction liquid adding system, the ranitidine base reaction liquid adding system is communicated with the continuous extractor by reaction liquid injection pipe, to add the ranitidine base reaction liquid in the continuous extractor;

[0008] Sinking liquid processing system, the sinking liquid processing system is used to receive the sinking liquid, and the extractant and the specific solute are separated by distillation, and the extractant is re-injected into the continuous extractor;The sinking liquid processing system is communicated with the continuous extractor by sinking liquid receiving pipe and extractant injection pipe respectively, to receive the sinking liquid and inject the extractant;

[0009] Floating liquid processing system, the floating liquid processing system is used to receive the floating liquid, and impurity is separated by distillation, crystallization and centrifugation, to obtain crystallized ranitidine;The floating liquid processing system is communicated with the continuous extractor by floating liquid receiving pipe.

[0010] Preferably, the continuous extractor comprises a tank body, a stirring device and a disperser; the stirring device is installed on the tank body for stirring the liquid in the tank body; the disperser is installed in the tank body for dispersing the Ranitidine base reaction liquid flowed out of the reaction liquid injection pipe or the extractant flowed out of the extractant injection pipe.

[0011] Preferably, inside the continuous extractor, first and second hexagonal honeycomb filler layers are respectively arranged on the upper and lower sides of the extractant injection pipe outlet, and third and fourth hexagonal honeycomb filler layers are respectively arranged on the upper and lower sides of the reaction liquid injection pipe outlet.

[0012] The upfloating liquid receiving pipe is located on the upper side of the first hexagonal honeycomb filler layer, and the downfloating liquid receiving pipe is located on the lower side of the fourth hexagonal honeycomb filler layer.

[0013] Preferably, the continuous extractor further comprises a first thermometer and a pressure monitor; the first thermometer is installed on the tank body for monitoring the temperature inside the tank body; the pressure monitor is installed on the tank body for monitoring the pressure inside the tank body.

[0014] Preferably, the downfloating liquid treatment system comprises a first reboiler, a first continuous distiller and a first condenser which are sequentially connected; the first reboiler is used for heating the downfloating liquid, the first continuous distiller is used for separating the downfloating liquid into gaseous extractant and liquid specific solute, and the first condenser is used for condensing the gaseous extractant; the bottom of the first continuous distiller is provided with a liquid outlet, and the liquid outlet is connected with a first reflux pipeline and a discharge pipeline; the first reflux pipeline is connected with the first reboiler to transport the liquid discharged from the first continuous distiller to the first reboiler; and the discharge pipeline is used for discharging the liquid specific solute.

[0015] Preferably, the downfloating liquid treatment system further comprises a first temporary storage tank, a second temporary storage tank and a third temporary storage tank; the first temporary storage tank is connected with the continuous extractor through the downfloating liquid receiving pipe, and the first temporary storage tank is connected with the first reboiler; the first condenser, the second temporary storage tank and the third temporary storage tank are sequentially connected, and the third temporary storage tank is connected with the continuous extractor through the extractant injection pipe.

[0016] A first pump body is arranged on the pipeline between the first temporary storage tank and the first reboiler, and the first pump body is used for pumping the downfloating liquid in the first temporary storage tank into the first reboiler.

[0017] A second pump body is arranged on the extractant injection pipe, and the second pump body is used for pumping the extractant in the third temporary storage tank into the continuous extractor.

[0018] Preferably, the upper floating liquid treatment system comprises a second reboiler, a second continuous distiller, a crystallization kettle and a centrifuge in sequence; the second reboiler is used for heating the upper floating liquid, the second continuous distiller is used for separating the upper floating liquid into water vapor and concentrated liquid; the crystallization kettle is used for crystallizing the concentrated liquid to obtain ranitidine base crystals; the centrifuge is used for separating the ranitidine base crystals from impurities; the second continuous distiller is provided with an exhaust port at the top to discharge the water vapor; the second continuous distiller and the crystallization kettle are further communicated with the second reboiler through a second reflux pipeline to convey the concentrated liquid to the second reboiler.

[0019] Preferably, the upper floating liquid treatment system further comprises a fourth temporary storage tank, the fourth temporary storage tank is communicated with the continuous extractor through the upper floating liquid receiving pipeline, and the fourth temporary storage tank is communicated with the second reboiler; a third pump body is arranged on a pipeline between the fourth temporary storage tank and the second reboiler.

[0020] Preferably, the upper floating liquid treatment system further comprises a second condenser and a fifth temporary storage tank, the exhaust port of the second continuous distiller is communicated with the second condenser, and the second condenser is communicated with the fifth temporary storage tank.

[0021] Preferably, a first back pressure valve is arranged on the subsidence liquid receiving pipeline, and a second back pressure valve is arranged on the upper floating liquid receiving pipeline; a first flow rate regulating valve is arranged on the reaction liquid injection pipeline, and a second flow rate regulating valve is arranged on the extractant injection pipeline.

[0022] The utility model discloses relative to prior art has obtained following technical effect:

[0023] The subsidence liquid treatment system of the utility model separates the mixture of extractant and specific solute after recovery, and adds the separated extractant into the continuous extractor again, to realize the continuous application of the extractant. The upper floating liquid treatment system separates the water in the upper floating liquid through distillation and crystallization, and separates the obtained ranitidine base crystals from impurities through centrifugation, to obtain ranitidine base crystals. The above process is continuous and automatic, reduces the manual participation, and improves the work efficiency. In addition, the subsidence liquid treatment system can realize the continuous addition of the extractant, so that the content of specific solute in the discharge of the continuous extractor is reduced after the continuous extraction recovery device is worked, to reduce the pollution to the environment. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only represent some of the embodiments of the present application, and not 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 the present application.

[0025] Figure 1 A schematic view of a continuous extraction and recovery device for ranitidine base reaction liquid according to an embodiment of the present application.

[0026] Legend of reference signs:

[0027] 1, continuous extractor; 2, stirring motor; 3, first thermometer; 4, extractant injection pipe; 5, pressure monitor; 6, upper floating liquid receiving pipe; 7, second back pressure valve; 8, first hexagonal honeycomb filler layer; 9, second disperser; 10, second hexagonal honeycomb filler layer; 11, stirring paddle; 12, third hexagonal honeycomb filler layer; 13, first disperser; 14, first back pressure valve; 15, sinking liquid receiving pipe; 16, fourth hexagonal honeycomb filler layer; 17, reaction liquid injection pipe; 18, first flow rate adjusting valve; 19, eighth pump body; 20, reaction liquid storage tank; 21, second flow rate adjusting valve; 22, second pump body; 23, third temporary storage tank; 24, extractant liquid delivery pipe; 25, first condenser; 26, second temporary storage tank; 27, extractant vapor delivery pipe; 28, first continuous distiller; 29, connecting pipeline; 30, partition; 30-1, second thermometer; 31, fifth pump body; 32, first reboiler; 33, fourth pump body; 34, third flow rate adjusting valve; 35, first pump body; 36, first temporary storage tank; 37, fourth temporary storage tank; 38, third pump body; 39, second reboiler; 40, fourth flow rate adjusting valve; 41, second continuous distiller feed inlet; 42, second continuous distiller; 43, seventh pump body; 44, sixth pump body; 45, second continuous distiller liquid outlet; 46, third thermometer; 47, second condenser; 48, fifth temporary storage tank; 49, crystallization kettle; 50, centrifuge. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, and not 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 the present application.

[0029] The present application provides a continuous extraction and recovery device for ranitidine base reaction liquid, which is used to realize continuous extraction and recovery of ranitidine base reaction liquid.

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0031] With reference to Figure 1 The present embodiment provides a continuous extraction and recovery device for ranitidine base reaction liquid (hereinafter referred to as continuous extraction and recovery device), which comprises a continuous extractor 1, a ranitidine base reaction liquid adding system, a sinking liquid treatment system and a floating liquid treatment system.

[0032] The extractant and the ranitidine base reaction liquid are extracted in the continuous extractor 1 to obtain sinking liquid and floating liquid. The floating liquid is the solution after removing specific solutes from the ranitidine base reaction liquid, and the sinking liquid is the mixture of the extractant (such as dichloromethane or chloroform) and the specific solutes. The ranitidine base reaction liquid adding system is connected to the continuous extractor 1 through a reaction liquid injection pipe 17 to add the ranitidine base reaction liquid into the continuous extractor 1. The sinking liquid treatment system is used to receive the sinking liquid, separate the extractant from the specific solutes by distillation, and re-inject the extractant into the continuous extractor 1. The sinking liquid treatment system is connected to the continuous extractor 1 through a sinking liquid receiving pipe 15 and an extractant injection pipe 4 respectively to receive the sinking liquid and inject the extractant. The floating liquid treatment system is used to receive the floating liquid, separate impurities by distillation, crystallization and centrifugation to obtain crystallized ranitidine base. The floating liquid treatment system is connected to the continuous extractor 1 through a floating liquid receiving pipe 6.

[0033] The working principle of the continuous extraction and recovery device of the present embodiment is as follows:

[0034] The sinking liquid treatment system separates the mixture of the extractant and the specific solutes after recovery, and re-injects the separated extractant into the continuous extractor 1 to realize continuous application of the extractant. The floating liquid treatment system separates the water in the floating liquid by distillation and crystallization, and then separates the obtained ranitidine base crystals from impurities by centrifugation to obtain ranitidine base crystals. The above process is continuous and automatic, reducing the participation of manual work and improving the work efficiency. In addition, the sinking liquid treatment system can realize continuous addition of the extractant, so that after the continuous extraction and recovery device works, the content of the specific solutes in the discharge of the continuous extractor 1 is reduced, thereby reducing the pollution to the environment.

[0035] As a possible example, in the embodiment, the continuous extractor 1 comprises a tank body, a stirring device and a disperser. The stirring device is installed on the tank body for stirring the liquid in the tank body. The disperser is installed in the tank body for dispersing the ranitidine base reaction liquid flowed out of the reaction liquid injection pipe 17 or the extractant flowed out of the extractant injection pipe 4. Specifically, the stirring device comprises a stirring motor 2, a stirring shaft and stirring blades 11. The stirring shaft penetrates through the top cover of the continuous extractor 1, and the stirring blades 11 are installed on the part of the stirring shaft extending into the continuous extractor 1. The part of the stirring shaft extending out of the continuous extractor 1 is connected in transmission with the stirring motor 2. When the stirring motor 2 works, it drives the stirring shaft and the stirring blades 11 to rotate, so that the extractant and the ranitidine base reaction liquid in the continuous extractor 1 are fully mixed, and the extraction efficiency is improved. The disperser has a porous structure and can disperse the liquid flow into multiple streams. In the embodiment, the disperser comprises a first disperser 13 and a second disperser 9. The first disperser 13 is opposite to the outlet of the reaction liquid injection pipe 17 to disperse the ranitidine base reaction liquid added into the continuous extractor 1. The second disperser 9 is opposite to the outlet of the extractant injection pipe 4 to disperse the extractant added into the continuous extractor 1.

[0036] As a possible example, in the embodiment, inside the continuous extractor 1, a first hexagonal honeycomb filler layer 8 and a second hexagonal honeycomb filler layer 10 are arranged on the upper and lower sides of the outlet of the extractant injection pipe 4 respectively, and a third hexagonal honeycomb filler layer 12 and a fourth hexagonal honeycomb filler layer 16 are arranged on the upper and lower sides of the outlet of the reaction liquid injection pipe 17 respectively. The upfloating receiving pipe 6 is located on the upper side of the first hexagonal honeycomb filler layer 8, and the downfloating receiving pipe 15 is located on the lower side of the fourth hexagonal honeycomb filler layer 16. The first hexagonal honeycomb filler layer 8 and the fourth hexagonal honeycomb filler layer 16 can accelerate the oil-water separation, and the second hexagonal honeycomb filler layer 10 and the third hexagonal honeycomb filler layer 12 can slow down the flow rate.

[0037] As a possible example, in the embodiment, the continuous extractor 1 further comprises a first thermometer 3 and a pressure monitor 5. The first thermometer 3 is installed on the tank body for monitoring the temperature inside the tank body. The pressure monitor 5 is installed on the tank body for monitoring the pressure inside the tank body.

[0038] As a possible example, in the embodiment, the subsink treatment system comprises a first reboiler 32, a first continuous distiller 28 and a first condenser 25 connected in sequence. The first reboiler 32 is used for heating the subsink, and the first reboiler 32 is connected with the first continuous distiller 28 through a connecting pipeline 29. The first continuous distiller 28 is used for separating the subsink into gaseous extractant and liquid specific solute. The first condenser 25 is used for condensing the gaseous extractant. The bottom of the first continuous distiller 28 is provided with a liquid outlet, and the liquid outlet is connected with a first reflux pipeline and a discharge pipeline respectively. The first reflux pipeline is connected with the first reboiler 32. The top of the first continuous distiller 28 is provided with a gas outlet, and the gas outlet is connected with the first condenser 25 through an extractant vapor delivery pipeline 27. A plurality of baffles 30 are arranged between the liquid outlet and the gas outlet in the first continuous distiller 28, and the plurality of baffles 30 are arranged staggeredly to increase the evaporation area. The liquid flowing out of the liquid outlet is divided into two parts. One part reenters the first reboiler 32 along the first reflux pipeline under the pumping of a fourth pump body 33 to improve the utilization rate of the extractant. The other part is output along the discharge pipeline under the pumping of a fifth pump body 31. A third flow rate adjusting valve 34 is arranged on the first reflux pipeline. The first continuous distiller 28 is provided with a second thermometer 30-1 for monitoring the internal temperature of the first continuous distiller 28.

[0039] As a possible example, in the embodiment, the subsink treatment system further comprises a first temporary storage tank 36, a second temporary storage tank 26 and a third temporary storage tank 23. The first temporary storage tank 36 is connected with the continuous extractor 1 through a subsink receiving pipeline 15, and the first temporary storage tank 36 is connected with the first reboiler 32. The first condenser 25, the second temporary storage tank 26 and the third temporary storage tank 23 are connected in sequence, and the third temporary storage tank 23 is connected with the continuous extractor 1 through an extractant injection pipeline 4. The pipeline between the second temporary storage tank 26 and the third temporary storage tank 23 is an extractant liquid delivery pipeline 24. A first pump body 35 is arranged on the pipeline between the first temporary storage tank 36 and the first reboiler 32, and the first pump body 35 is used for pumping the subsink in the first temporary storage tank 36 into the first reboiler 32. A second pump body 22 is arranged on the extractant injection pipeline 4, and the second pump body 22 is used for pumping the extractant in the third temporary storage tank 23 into the continuous extractor 1. According to actual needs, other arrangement modes of the temporary storage tank and the pump body can also be selected by those skilled in the art.

[0040] As a possible example, in the embodiment, the upper floating liquid treatment system comprises a second reboiler 39, a second continuous distiller 42, a crystallization kettle 49 and a centrifuge 50 connected in sequence. The second reboiler 39 is used for heating the upper floating liquid, and the second continuous distiller 42 is used for separating the upper floating liquid into water vapor and concentrated liquid. The crystallization kettle 49 is used for crystallizing the concentrated liquid to obtain ranitidine base crystals. The centrifuge 50 is used for separating the ranitidine base crystals from impurities. The second continuous distiller 42 is provided with an exhaust port at the top to discharge water vapor. The second continuous distiller 42 is provided with a liquid discharge port at the bottom to discharge liquid. A plurality of baffles 30 are arranged between the liquid discharge port and the exhaust port inside the second continuous distiller 42, and the plurality of baffles 30 are arranged staggered to increase the evaporation area. The second continuous distiller 42 and the crystallization kettle 49 are further connected to the second reboiler 39 through a second reflux pipeline to convey the concentrated liquid to the second reboiler 39. Specifically, the liquid discharge port of the second continuous distiller 42 is connected to the second reflux pipeline. The concentrated liquid output by the crystallization kettle 49 is combined with the liquid discharged by the second continuous distiller 42 under the pumping of the sixth pump body 44, and then both are conveyed to the second reboiler 39 under the pumping of the seventh pump body 43. The second reflux pipeline is provided with a fourth flow rate adjusting valve 40, and the second continuous distiller 42 is provided with a third thermometer 46 for monitoring the internal temperature of the second continuous distiller 42.

[0041] As a possible example, in the embodiment, the upper floating liquid treatment system further comprises a fourth temporary storage tank 37 connected to the continuous extractor 1 through the upper floating liquid receiving pipe 6, and connected to the second reboiler 39. A third pump body 38 is arranged on the pipeline between the fourth temporary storage tank 37 and the second reboiler 39, and is used for pumping the upper floating liquid stored in the fourth temporary storage tank 37 to the second reboiler 39.

[0042] As a possible example, in the embodiment, the upper floating liquid treatment system further comprises a second condenser 47 and a fifth temporary storage tank 48, and the exhaust port of the second continuous distiller 42 is connected to the second condenser 47, and the second condenser 47 is connected to the fifth temporary storage tank 48. By arranging the second condenser 47 and the fifth temporary storage tank 48, the gas obtained by the second continuous distiller 42 is liquefied and recovered, and after recovery, it can be selected to be reused or purified.

[0043] As a possible example, in the embodiment, the subsidence liquid receiving pipe 15 is provided with a first back pressure valve 14, and the upper floating liquid receiving pipe 6 is provided with a second back pressure valve 7 to adjust the back pressure of the subsidence liquid receiving pipe 15 and the upper floating liquid receiving pipe 6, respectively. The reaction liquid injection pipe 17 is connected to the reaction liquid storage tank 20 and the continuous extractor 1, respectively, and the reaction liquid injection pipe 17 is provided with a first flow rate adjusting valve 18 and an eighth pump body 19, and the extraction agent injection pipe 4 is provided with a second flow rate adjusting valve 21 to adjust the injection speed of the ranitidine reaction liquid and the injection speed of the extraction agent, respectively.

[0044] The principles and implementation modes of the present application are described in the specification by using specific examples. The above examples are only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A device for continuous extraction recovery of ranitidine base reaction solution, characterized by, The device comprises: a continuous extractor, in which the extractant reacts with the ranitidine base reaction solution to obtain a sinking solution and a floating solution; the floating solution is the solution of the ranitidine base reaction solution after removing a specific solute, and the sinking solution is the mixture of the extractant and the specific solute; a ranitidine base reaction solution adding system, which is connected to the continuous extractor through a reaction solution injection pipe to add the ranitidine base reaction solution into the continuous extractor; a sinking solution treatment system, which is used to receive the sinking solution, separate the extractant from the specific solute by distillation, and inject the extractant into the continuous extractor; the sinking solution treatment system is connected to the continuous extractor through a sinking solution receiving pipe and an extractant injection pipe to receive the sinking solution and inject the extractant, respectively; a floating solution treatment system, which is used to receive the floating solution, separate impurities by distillation, crystallization and centrifugation to obtain crystallized ranitidine base; the floating solution treatment system is connected to the continuous extractor through a floating solution receiving pipe.

2. The device for continuously extracting and recovering the ranitidine base reaction solution according to claim 1, wherein: the continuous extractor comprises a tank body, a stirring device and a disperser; the stirring device is installed on the tank body to stir the liquid in the tank body; and the disperser is installed in the tank body to disperse the ranitidine base reaction solution flowing out of the reaction solution injection pipe or the extractant flowing out of the extractant injection pipe.

3. The device for continuously extracting and recovering the ranitidine base reaction solution according to claim 2, wherein: on the inside of the continuous extractor, a first hexagonal honeycomb filler layer and a second hexagonal honeycomb filler layer are arranged on the upper and lower sides of the extractant injection pipe outlet, respectively, and a third hexagonal honeycomb filler layer and a fourth hexagonal honeycomb filler layer are arranged on the upper and lower sides of the reaction solution injection pipe outlet, respectively; the floating solution receiving pipe is located on the upper side of the first hexagonal honeycomb filler layer, and the sinking solution receiving pipe is located on the lower side of the fourth hexagonal honeycomb filler layer.

4. The device for continuously extracting and recovering the ranitidine base reaction solution according to claim 2, wherein: the continuous extractor further comprises a first thermometer and a pressure monitor; the first thermometer is installed on the tank body to monitor the temperature inside the tank body; and the pressure monitor is installed on the tank body to monitor the pressure inside the tank body.

5. The device for continuously extracting and recovering the ranitidine base reaction solution according to claim 1, wherein: The sinking liquid treatment system comprises a first reboiler, a first continuous distiller and a first condenser which are sequentially communicated; the first reboiler is used for heating the sinking liquid; the first continuous distiller is used for separating the sinking liquid into gaseous extractant and liquid specific solute; the first condenser is used for condensing the gaseous extractant; the bottom of the first continuous distiller is provided with a liquid discharge port which is respectively communicated with a first reflux pipeline and a discharge pipeline; the first reflux pipeline is communicated with the first reboiler so as to transport the liquid discharged from the first continuous distiller to the first reboiler; the discharge pipeline is used for discharging the liquid specific solute.

6. The continuous extraction recovery device for ranitidine base reaction liquid according to claim 5, characterized in that: The sinking liquid treatment system further comprises a first temporary storage tank, a second temporary storage tank and a third temporary storage tank; the first temporary storage tank is communicated with the continuous extractor through the sinking liquid receiving pipeline; the first temporary storage tank is communicated with the first reboiler; the first condenser, the second temporary storage tank and the third temporary storage tank are sequentially communicated; the third temporary storage tank is communicated with the continuous extractor through the extractant injection pipeline; A first pump body is arranged on the pipeline between the first temporary storage tank and the first reboiler; the first pump body is used for pumping the sinking liquid in the first temporary storage tank into the first reboiler; An second pump body is arranged on the extractant injection pipeline; the second pump body is used for pumping the extractant in the third temporary storage tank into the continuous extractor.

7. The continuous extraction recovery device for ranitidine base reaction liquid according to claim 1, characterized in that: The floating liquid treatment system comprises a second reboiler, a second continuous distiller, a crystallization kettle and a centrifugal machine which are sequentially communicated; the second reboiler is used for heating the floating liquid; the second continuous distiller is used for separating the floating liquid into water vapor and concentrated liquid; the crystallization kettle is used for crystallizing the concentrated liquid to obtain ranitidine base crystals; the centrifugal machine is used for separating the ranitidine base crystals from impurities; the top of the second continuous distiller is provided with an exhaust port for discharging the water vapor; the second continuous distiller and the crystallization kettle are further communicated with the second reboiler through a second reflux pipeline so as to transport the concentrated liquid to the second reboiler.

8. The continuous extraction recovery device for ranitidine base reaction liquid according to claim 7, characterized in that: The floating liquid treatment system further comprises a fourth temporary storage tank; the fourth temporary storage tank is communicated with the continuous extractor through the floating liquid receiving pipeline; the fourth temporary storage tank is communicated with the second reboiler; a third pump body is arranged on the pipeline between the fourth temporary storage tank and the second reboiler.

9. The continuous extraction recovery device for ranitidine base reaction liquid according to claim 7, characterized in that: The floating liquid treatment system further comprises a second condenser and a fifth temporary storage tank; the exhaust port of the second continuous distiller is communicated with the second condenser; the second condenser is communicated with the fifth temporary storage tank.

10. The continuous extraction recovery device for ranitidine base reaction solution according to claim 1, characterized in that: a first back pressure valve is installed on the sinking liquid receiving pipe, a second back pressure valve is installed on the floating liquid receiving pipe; a first flow rate regulating valve is installed on the reaction solution injection pipe, and a second flow rate regulating valve is installed on the extractant injection pipe.

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