Reflux condensing device based on flow guide pipe

Abstract

The utility model discloses a reflux condensing device based on a flow guide pipe. The reflux condensing device based on the flow guide pipe comprises a condenser body and a reaction kettle, the condenser body comprises a tube pass and a shell pass, the tube pass is surrounded by the shell pass, a cooling cavity is formed between the tube pass and the shell pass, a cooling medium inlet and a cooling medium outlet are formed in the shell pass, a cooling medium flows in the cooling cavity for cooling, and a collecting flow guide assembly is arranged in the lower end of the tube pass. Comprising a liquid-phase collecting tank, a liquid-phase flow guide pipe and a vapor-phase rising hole, the upper part of the liquid-phase collecting tank is fixed at the lower end of the tube pass, and the lower part of the liquid-phase collecting tank is communicated with a liquid-phase guide pipe; a vapor-phase rising hole is formed in the liquid-phase collecting tank, and a vapor-phase material rises into the tube pass through the vapor-phase rising hole for heat exchange and cooling. When the liquid phase in the liquid phase collecting tank is excessively accumulated, the vapor phase rising hole can play an overflow role to prevent the liquid phase collecting tank from bearing overweight load. The liquid-phase flow guide pipe is directly communicated with the interior of the reaction kettle, so that the vaporization phenomenon can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a backflow device technical field especially relates to a backflow condensing device based on flow guide pipe. BACKGROUND

[0002] As a kind of heat exchange equipment, backflow condenser is mainly used in chemical industry, petroleum and energy industry field.In rectification or chemical reaction process, backflow condenser is as key equipment, and it plays a vital role for guaranteeing the stable operation of chemical production process and the loss control of volatile raw materials.Its core function is to condense high-temperature steam using low-temperature cooling medium, and heat exchange is realized by the reverse contact of gas-liquid two-phase.The process ensures that chemical raw materials are uniformly distributed in rectification column or refluxed into reaction kettle in liquid phase, so that the temperature level required for equipment production is maintained, material loss is reduced, and stable operation of equipment is guaranteed.

[0003] The Chinese patent with the authorization announcement number CN208810054U discloses a reaction kettle backflow condensing device, which includes backflow reaction kettle, tube condenser, condenser pipeline and backflow pipeline.Through double pipeline, independent operation of vapor phase rising and liquid phase backflow is realized.But the increase of the length of pipeline and the number of its elbows may cause the increase of the flow resistance of vapor phase and liquid phase, which reduces the heat exchange efficiency of condenser to some extent, and for the chemical raw materials with higher volatility, it may increase the risk level invisibly.The Chinese patent with the authorization announcement number CN209348150U discloses a condensing backflow device.Through backflow tank, the resistance in liquid phase backflow process can be reduced to some extent.However, the backflow tank may cause material backflow overflow.And in the absence of liquid level monitoring, the existence of backflow tank may reduce the heat exchange efficiency of condenser.

[0004] In addition, the condenser of prior art does not consider the specific position of liquid phase backflow into reaction kettle.In some heterogeneous chemical reaction processes, the specific position of liquid phase backflow into reaction kettle has a significant influence on improving the conversion rate of chemical reaction.In general condenser structure, the direction of liquid phase backflow mainly falls along backflow pipeline.For reaction system with small backflow amount, liquid phase backflow may flow down along the wall of reaction kettle.In this case, the material of backflow has not been fully contacted with other non-volatile reactants in reaction kettle, and it is vaporized again and returned to condenser, which is extremely unfavorable for the yield of chemical product. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a backflow condensing device based on flow guide pipe, so as to overcome the deficiencies in prior art.In order to achieve the above-mentioned utility model purpose, the technical scheme adopted by the utility model includes:

[0006] The utility model provides a kind of backflow condensing device based on flow guide pipe, including condenser main part, reaction kettle, the condenser main part includes tube pass and shell side, the shell side is located the tube pass outside, the gap of tube pass and shell side forms cooling chamber, cooling medium inlet, cooling medium outlet are provided on the shell side, cooling medium flows in cooling chamber by cooling medium inlet, cooling medium outlet, the lower end inside of the tube pass is provided with collection flow guide component, the collection flow guide component includes liquid phase collection groove, liquid phase flow guide pipe, vapor phase ascending hole;The upper portion of the liquid phase collection groove is fixed in the lower end of the tube pass, and the lower portion is communicated with the liquid phase flow guide pipe, and the liquid phase flow guide pipe is communicated with the inside of the reaction kettle;Vapor phase ascending hole is provided on the liquid phase collection groove, and vapor phase material is raised to the inside of the tube pass by the vapor phase ascending hole to carry out heat exchange cooling.

[0007] In some more specific embodiments, the liquid phase collection groove includes a liquid inlet, a liquid outlet, and a groove surface, the liquid inlet is attached to the inner wall of the tube pass, the liquid outlet is communicated with the liquid phase flow guide pipe, the connection part of the liquid inlet and the liquid outlet is the groove surface, and the vapor phase ascending hole is provided on the groove surface. Specifically, the cross section of the groove surface is wide at the top and narrow at the bottom, similar to a funnel shape.

[0008] Preferably, a plurality of vapor phase ascending holes are provided on the groove wall of the groove surface, the plurality of vapor phase ascending holes are arranged in a ring shape along the circumference of the groove surface, and the vapor phase ascending hole is circular or polygonal.

[0009] In some more specific embodiments, the liquid phase flow guide pipe is an integrated bending type, including a liquid phase flow guide inner tube and a liquid phase flow guide outer tube, and the included angle between the liquid phase flow guide inner tube and the liquid phase flow guide outer tube is 0-90 degrees. The liquid phase flow guide inner tube is distributed inside the tube pass, the liquid phase flow guide outer tube is distributed inside the reaction kettle, and the extension direction of the liquid phase flow guide outer tube points to the stirring area inside the reaction kettle.

[0010] In some more specific embodiments, the diameter of the liquid phase flow guide pipe is d1, and the diameter of the tube pass is d2, and the value range of d2 is 3d1-20d1. In addition, the liquid phase flow guide pipe can be selected from carbon steel, stainless steel, tetrafluoride, glass, and special materials suitable for two-phase flow according to the characteristics of the material, and the tube pass and the shell side are any one of metal, graphite or glass.

[0011] In some more specific embodiments, the collection flow guide component and the tube pass are separate, the collection flow guide component is fixed inside the lower end of the tube pass through flange, so as to simplify the installation process and facilitate the replacement of different specifications of equipment.

[0012] Compared with the prior art, the utility model has at least the following advantages:

[0013] First, the backflow condensing device based on the flow guide pipe provided by the utility model, since the condenser main body is directly connected with the reaction kettle, the demand of pipeline connection is almost eliminated, thereby the fluid resistance is reduced to the maximum extent. In addition, the pipe length of the vapor phase rising is also shortened, thereby the generation of the condensate is more effectively promoted.

[0014] Second, the backflow condensing device based on the flow guide pipe provided by the utility model, the vapor phase rising hole is used for making the vapor phase material enter the inside of the pipe length for heat exchange and cooling. In addition, when the liquid phase in the liquid phase collecting groove accumulates to a certain amount, the vapor phase rising hole can also play the overflow function, the condensate flows into the reaction kettle from the vapor phase rising hole, and the liquid phase collecting groove is effectively prevented from bearing excessive load.

[0015] Third, the backflow condensing device based on the flow guide pipe provided by the utility model, the extension direction of the liquid phase flow guide outer pipe points to the stirring area inside the reaction kettle, can make the condensate directly drop to the stirring center, thereby the maximum stirring rate is realized, so as to sufficiently promote the contact with other materials. In addition, the diameter of the liquid phase flow guide pipe is designed to be small, for the reaction system with small backflow amount, vaporization can be effectively avoided. The liquid phase backflow can directly drop to the stirring center through the liquid phase flow guide pipe, and fully contacts with other non-volatile reactants in the reaction kettle, thereby the production rate of the chemical product is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structure schematic view of the backflow condensing device based on the flow guide pipe provided by the utility model embodiment;

[0017] Figure 2 is the partial enlarged view of the collection flow guide assembly provided by the utility model embodiment.

[0018] MARK NUMBER EXPLANATION:

[0019] 1, shell course;2, pipe course;3, cooling medium inlet;4, cooling medium outlet;5, liquid phase collecting groove;6, vapor phase rising hole;7, liquid phase flow guide pipe. DETAILED DESCRIPTION

[0020] In view of the deficiencies in the prior art, the present inventors have long-term research and a large number of practices, and finally propose the technical scheme of the utility model. The technical scheme, the implementation process and the principle will be further explained and described as follows.

[0021] Please refer to Figure 1A kind of reflux condensing device based on draft tube, including condenser main body, reaction kettle.Wherein, condenser main body includes tube pass 2 and shell pass 1.Shell pass 1 is located outside tube pass 2, and the gap between tube pass 2 and shell pass 1 forms cooling chamber.Cooling medium inlet 3, cooling medium outlet 4 are provided on shell pass 1.Cooling medium flows in cooling chamber by cooling medium inlet 3, cooling medium outlet 4.

[0022] In the embodiment, the lower end of tube pass 2 is internally provided with collection guide assembly, and the collection guide assembly includes liquid phase collection groove 5, liquid phase draft tube 7 and vapor phase rising hole 6.The upper part of liquid phase collection groove 5 is fixed at the lower end of tube pass 2, and the lower part is communicated with liquid phase draft tube 7, and liquid phase draft tube 7 is communicated with the inside of reaction kettle.Vapor phase rising hole 6 is provided on the upper part of liquid phase collection groove 5, and vapor phase materials rise to the inside of tube pass 2 through vapor phase rising hole 6 to carry out heat exchange and cooling.

[0023] Specifically, the collection guide assembly is installed at the connecting part of condenser main body and reaction kettle.Liquid phase collection groove 5 is mainly used for collecting condensate in condenser main body to provide energy reserve for subsequent liquid phase guide.Vapor phase rising hole 6 is used for making vapor phase materials enter the inside of tube pass 2 to carry out heat exchange and cooling.In addition, when the liquid phase in liquid phase collection groove 5 accumulates to a certain amount, vapor phase rising hole 6 can also play the function of overflow, and the condensate flows into the reaction kettle from vapor phase rising hole 6 to effectively prevent liquid phase collection groove 5 from bearing excessive load.The tube pass 2 can include various types such as tube type, coil type and spherical tube type.

[0024] In the embodiment, liquid phase collection groove 5 includes liquid inlet and liquid outlet, the liquid inlet is attached to the inner wall of tube pass 2, the liquid outlet is communicated with liquid phase draft tube 7, and the connecting part of liquid inlet and liquid outlet is provided with groove face, and a plurality of vapor phase rising holes 6 are arranged on the groove wall of groove face, and the plurality of vapor phase rising holes 6 are arranged in annular shape along the circumference of groove face.

[0025] Specifically, the vapor phase rising hole 6 is elliptical.The arrangement of vapor phase rising hole 6 is non-continuous annular distribution.These are all routine knowledge for those skilled in the art, and the specific size and other information of vapor phase rising hole 6 will not be described here.

[0026] In certain heterogeneous chemical reaction processes, the return of liquid phase to a specific position of reaction kettle has a significant influence on improving the conversion rate of chemical reaction.In the embodiment, liquid phase draft tube 7 is an integral bending type, including liquid phase guide inner tube and liquid phase guide outer tube.Liquid phase guide inner tube is distributed in the inside of tube pass 2, and liquid phase guide outer tube is distributed in the inside of reaction kettle, and the extension direction of liquid phase guide outer tube is collinear with the stirring center point in the inside of reaction kettle, so as to realize the maximum stirring rate to sufficiently promote the contact with other materials, especially for the heterogeneous materials with large specific gravity, which significantly improves the efficiency of mixing and contact.

[0027] In the embodiment, the diameter of the liquid phase flow guide pipe 7 is d1, the diameter of the pipe passage 2 is d2, and the value range of d2 is 3d1~20d1. Specifically, the diameter of the liquid phase flow guide pipe 7 is designed to be small, and for the reaction system with small backflow, vaporization can be effectively avoided. The liquid phase backflow can directly drop to the stirring center through the liquid phase flow guide pipe 7, and fully contact with other non-volatile reactants in the reaction kettle, thereby significantly improving the production rate of the chemical product.

[0028] In the embodiment, the liquid phase flow guide pipe 7 can be selected from carbon steel, stainless steel, tetrafluoride, glass and special materials suitable for two-phase fluid according to the material characteristics, and the pipe passage 2 and the shell passage 1 are any one of metal, graphite or glass.

[0029] In another embodiment, the collection flow guide assembly is separate from the pipe passage 2, and the collection flow guide assembly is fixed inside the lower end of the pipe passage 2 through a flange, thereby simplifying the installation process and facilitating the replacement of different specifications of equipment.

[0030] It should be understood that the above embodiments are only to illustrate the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A draft tube based reflux condenser device, comprising a condenser body, a reactor, the condenser body comprising a tube pass and a shell pass, the shell pass being located outside the tube pass, the gap between the tube pass and the shell pass forming a cooling chamber, the shell pass being provided with a cooling medium inlet, a cooling medium outlet, the cooling medium flowing in the cooling chamber through the cooling medium inlet, the cooling medium outlet, characterized in that: The lower end of the tube pass is internally provided with a collection and flow guide assembly, which comprises a liquid phase collection groove, a liquid phase flow guide pipe and a vapor phase rising hole; the upper part of the liquid phase collection groove is fixed at the lower end of the tube pass, and the lower part is communicated with the liquid phase flow guide pipe, which is communicated with the inside of the reaction kettle; the liquid phase collection groove is provided with a vapor phase rising hole, through which the vapor phase material rises to the inside of the tube pass for heat exchange and cooling.

2. The draft tube based reflux condenser of claim 1, wherein, The liquid phase collection groove comprises a liquid inlet, a liquid outlet and a groove surface; the liquid inlet is attached to the inner wall of the tube pass; the liquid outlet is communicated with the liquid phase flow guide pipe; the connection part of the liquid inlet and the liquid outlet is the groove surface, which is provided with a vapor phase rising hole.

3. The draft tube based reflux condenser of claim 2, wherein, The groove wall of the groove surface is provided with a plurality of vapor phase rising holes, which are arranged in a ring shape along the circumference of the groove surface. The vapor phase rising hole can be circular or polygonal.

4. The draft tube based reflux condenser of claim 1, wherein, The liquid phase flow guide pipe is an integral bending type, comprising a liquid phase flow guide inner pipe and a liquid phase flow guide outer pipe; the liquid phase flow guide inner pipe is distributed in the inside of the tube pass; the liquid phase flow guide outer pipe is distributed in the inside of the reaction kettle; the extension direction of the liquid phase flow guide outer pipe points to the stirring area in the inside of the reaction kettle. The included angle between the liquid phase flow guide inner pipe and the liquid phase flow guide outer pipe is 0-90 degrees.

5. The draft tube based reflux condenser of claim 1, wherein, The diameter of the liquid phase flow guide pipe is d1, and the diameter of the tube pass is d2; the value range of d2 is 3d1-20d1.

6. The draft tube based reflux condenser of claim 1, wherein, The collection and flow guide assembly and the tube pass are separate; the collection and flow guide assembly is fixed in the inside of the lower end of the tube pass through a flange.

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