Evaporator structure on organic solvent recovery device

Abstract

The utility model discloses an evaporator structure on an organic solvent recovery device, and belongs to the technical field of evaporators, the evaporator structure on the organic solvent recovery device comprises a tower body, the tower body comprises a top feeding section, a middle evaporation section and a bottom discharging section, the top end of the top feeding section is connected with a circulating feeding pipe, and the top end of the middle evaporation section is connected with a circulating discharging pipe. The bottom of the circulating feeding pipe is connected with a rotational flow buffering pipe opening, and a liquid distributor is arranged below the rotational flow buffering pipe opening. The rotational flow buffer pipe orifice and the liquid distributor arranged below the rotational flow buffer pipe orifice can uniformly distribute the entered liquid flow into the heat exchange pipe, so that the material entering the heat exchange pipe is uniform, and uniform evaporation and separation are facilitated; meanwhile, a plurality of groups of baffle plates are arranged in the middle evaporation section at intervals, and the baffle plates can enable high-temperature steam to flow according to a set flow direction, so that all positions of the heat exchange tubes are uniformly heated, and materials in the heat exchange tubes are more uniformly evaporated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to evaporimeter technical field, concretely relates to a kind of evaporimeter structure on organic solvent recovery device. BACKGROUND

[0002] Organic solvent refers to a kind of solvent by organic matter as medium, organic solvent can dissolve multiple categories of water-insoluble substance, widely used in industry;Since organic solvent is often toxic and flammable, it needs to be recycled after use to avoid pollution and reduce cost.

[0003] The separation of organic solvent is generally carried out by vertical tube falling film evaporator, since most of the organic solvents are heat-sensitive, they need to be evaporated smoothly under low temperature difference, however, since the height of the existing vertical tube falling film evaporator is generally 20-30 meters, firstly, the flow and lift of circulating pump are large, so the liquid flow rate and impact into the top are large, which makes the liquid produce large cyclone, the distribution of feed liquid into each tube is uneven, and some tubes are blocked due to lack of liquid;Secondly, when steam enters from the interface, it directly impacts the connection maintenance of heat exchange tube and tube plate due to large speed, which causes the welding to be loose after a long time, affects use, and the flow path after steam enters easily causes uneven heat distribution, local overheating and no heating at both ends, resulting in uneven evaporation. SUMMARY

[0004] The utility model aims at providing a kind of evaporimeter structure on organic solvent recovery device to solve the problems of the existing evaporimeter in use process in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of evaporimeter structure on organic solvent recovery device, including tower body, the tower body includes top feed section, middle evaporation section and bottom discharge section, the top end of the top feed section is connected with circulating feed pipe, the bottom of the circulating feed pipe is connected with cyclone buffer pipe, the lower portion of the cyclone buffer pipe is provided with liquid distributor, the middle evaporation section is uniformly provided with multiple groups of heat exchange tubes inside, the side of the middle evaporation section is connected with steam inlet, the position of the steam inlet is provided with arc baffle, the middle evaporation section is provided with baffle plate at intervals.

[0006] Preferably, the liquid distributor is a double-layer structure, and the bottom of the lower liquid distribution disc of the double-layer liquid distributor is provided with a tube plate.

[0007] Preferably, the diameter of the lower liquid distribution disc is adapted to the inner diameter of the tower body, a plurality of groups of plate holes are uniformly formed on the bottom hole plate of the lower liquid distribution disc, and each group of the plate holes is correspondingly arranged at the center of three groups of heat exchange tubes.

[0008] Preferably, the baffle plate is provided with a group of every 1.2m interval.

[0009] Preferably, the middle evaporation section is provided with a gas-liquid separator at the connecting position of the bottom discharge section, and the gas-liquid separator is provided with an annular wire mesh, and the annular wire mesh is provided with flush nozzles on the upper and lower sides.

[0010] Preferably, the bottom discharge section is connected with a circulating discharge pipe below, the circulating discharge pipe is communicated with the circulating feed pipe, and a circulating pump is connected between the two.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The cyclone buffer pipe opening and the liquid distributor arranged below can make the incoming liquid flow uniformly distributed into the heat exchange pipe, so that the material entering into the heat exchange pipe is uniform, facilitating uniform evaporation and separation; meanwhile, a plurality of groups of baffle plates are arranged at intervals in the middle evaporation section, the baffle plates can make the high-temperature steam flow in the set flow direction, so that the heat exchange pipe is uniformly heated at each position, and the material in the heat exchange pipe is more uniformly evaporated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic view of the main structure of the utility model;

[0014] Figure 2 It is a schematic view of the top feed section structure of the utility model;

[0015] Figure 3 It is a schematic view of the middle evaporation section structure of the utility model;

[0016] Figure 4 It is a schematic view of the bottom discharge section structure of the utility model;

[0017] Figure 5 It is a schematic view of the corresponding relationship between the liquid distributor plate hole and the heat exchange pipe.

[0018] In the drawing: 1, top feed section; 2, circulating feed pipe; 3, cyclone buffer pipe opening; 4, liquid distributor; 5, baffle plate; 6, middle evaporation section; 7, heat exchange pipe; 8, arc-shaped baffle; 9, flush nozzle; 10, annular wire mesh; 11, bottom discharge section; 12, circulating discharge pipe; 13, steam inlet. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0020] With reference to Figures 1-5 The evaporator structure on the organic solvent recovery device comprises a tower body, the tower body comprises a top feeding section 1, a middle evaporation section 6 and a bottom discharging section 11, a circulating feeding pipe 2 is connected to the top end of the top feeding section 1, a cyclone buffer pipe opening 3 is connected to the bottom of the circulating feeding pipe 2, a liquid distributor 4 is arranged below the cyclone buffer pipe opening 3, a plurality of groups of heat exchange pipes 7 are uniformly arranged in the middle evaporation section 6, a steam inlet 13 is connected to the side of the middle evaporation section 6, an arc-shaped baffle 8 is arranged at the position opposite to the steam inlet 13, and baffles 5 are arranged in the middle evaporation section 6 at intervals.

[0021] The evaporator structure on the organic solvent recovery device comprises a tower body, the tower body comprises a top feeding section 1, a middle evaporation section 6 and a bottom discharging section 11, a circulating feeding pipe 2 is connected to the top end of the top feeding section 1, a cyclone buffer pipe opening 3 is connected to the bottom of the circulating feeding pipe 2, a liquid distributor 4 is arranged below the cyclone buffer pipe opening 3, a plurality of groups of heat exchange pipes 7 are uniformly arranged in the middle evaporation section 6, a steam inlet 13 is connected to the side of the middle evaporation section 6, an arc-shaped baffle 8 is arranged at the position opposite to the steam inlet 13, and baffles 5 are arranged in the middle evaporation section 6 at intervals.

[0022] The evaporator structure on the organic solvent recovery device comprises a tower body, the tower body comprises a top feeding section 1, a middle evaporation section 6 and a bottom discharging section 11, a circulating feeding pipe 2 is connected to the top end of the top feeding section 1, a cyclone buffer pipe opening 3 is connected to the bottom of the circulating feeding pipe 2, a liquid distributor 4 is arranged below the cyclone buffer pipe opening 3, a plurality of groups of heat exchange pipes 7 are uniformly arranged in the middle evaporation section 6, a steam inlet 13 is connected to the side of the middle evaporation section 6, an arc-shaped baffle 8 is arranged at the position opposite to the steam inlet 13, and baffles 5 are arranged in the middle evaporation section 6 at intervals.

[0023] Further, the liquid distributor 4 is of a double-layer structure, and a tube sheet is arranged at the bottom of the lower liquid distribution disc of the double-layer liquid distributor 4.

[0024] Through the technical scheme, the liquid distributor 4 is a double-layer structure, wherein the diameter of the upper liquid distribution disc is smaller, and the upper liquid distribution disc is directly arranged below the rotating flow buffer pipe mouth 3, for further buffering and speed reduction, and reducing the impact force of the material sent into the lower liquid distribution disc, thereby effectively protecting the lower liquid distribution disc, avoiding deformation of the lower liquid distribution disc, and enabling the liquid distributor 4 to uniformly and stably guide the material through the tube plate and then to the heat exchange pipes 7.

[0025] Further, the diameter of the lower liquid distribution disc is matched with the inner diameter of the tower body, a plurality of groups of plate holes are uniformly arranged on the bottom hole plate of the lower liquid distribution disc, and a plurality of groups of heat exchange pipes 7 are uniformly connected to the tube plate, and each group of plate holes is correspondingly arranged at the center of the three groups of heat exchange pipes 7.

[0026] Through the technical scheme, the plate holes (such as the triangular holes shown in Figure 5 ) are uniformly arranged on the hole plate of the lower liquid distribution disc, the material is uniformly distributed and flows downward through the plate holes, and the tube plate is uniformly arranged below the hole plate, the plate holes are correspondingly arranged at the center of the three groups of heat exchange pipes 7 (such as the circular holes shown in Figure 5 ) on the tube plate, when the material flows down from the plate holes, the material falls at the center of the triangle formed by the three groups of heat exchange pipes 7, and the material can uniformly flow to the heat exchange pipes 7, thereby ensuring uniform feeding in the heat exchange pipes 7.

[0027] Further, the baffle plate 5 is arranged at intervals of 1.2 m.

[0028] The baffle plate 5 can make the steam move in the set flow direction, avoid the steam from being concentrated together to cause local overheating, cause decomposition or denaturation of the organic solvent with heat sensitivity, and uniformly distribute the heat of the steam to both ends of the heat exchange pipes 7, so that the material at both ends can be evaporated and recovered.

[0029] Further, a gas-liquid separator is arranged at the connection position of the middle evaporation section 6 and the bottom discharge section 11, an annular wire mesh 10 is arranged on the gas-liquid separator, and flush nozzles 9 are arranged on the upper and lower sides of the annular wire mesh 10.

[0030] The annular wire mesh 10 can effectively remove foam, and the flush nozzles 9 can automatically flush the annular wire mesh 10 to remove the accumulated foam on the annular wire mesh 10.

[0031] Further, a circulating discharge pipe 12 is connected below the bottom discharge section 11, the circulating discharge pipe 12 is communicated with the circulating feeding pipe 2, and a circulating pump is connected between the circulating discharge pipe 12 and the circulating feeding pipe 2.

[0032] Working principle: the material is sent from the top of the tower body, and is uniformly sent into the inside of the heat exchange pipe 7 through the cyclone buffer pipe 3 and the liquid distributor 4, at the same time, the external steam is sent into the evaporator, so that the material in the heat exchange pipe 7 reaches the evaporation temperature, thereby the organic solvent is evaporated and separated, and finally the recovery is completed, in this process, the cyclone buffer pipe 3 and the liquid distributor 4 arranged below can make the entering liquid flow uniformly distributed into the heat exchange pipe 7, so that the material entering into the heat exchange pipe 7 is uniform, which is convenient for uniform evaporation and separation; at the same time, a plurality of baffle plates 5 are arranged in the middle evaporation section 6, the baffle plate 5 can make the high-temperature steam flow in the set flow direction, so that the heat exchange pipe 7 is uniformly heated at each position, and the material in the heat exchange pipe 7 is more uniformly evaporated.

[0033] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined by those skilled in the art without contradiction.

[0035] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An evaporator structure on an organic solvent recovery apparatus, characterized by: The application relates to a tower body which comprises a top feeding section, a middle evaporation section and a bottom discharging section, the top end of the top feeding section is connected with a circulating feeding pipe, the bottom of the circulating feeding pipe is connected with a cyclone buffer pipe orifice, a liquid distributor is arranged below the cyclone buffer pipe orifice, a plurality of groups of heat exchange pipes are uniformly arranged in the middle evaporation section, a steam inlet is arranged at the side of the middle evaporation section, an arc-shaped baffle is arranged at the position opposite to the steam inlet, and baffles are arranged in the middle evaporation section at intervals.

2. The evaporator structure on an organic solvent recovery unit of claim 1, wherein: The liquid distributor is a double-layer structure, and the bottom of the lower liquid distribution disc of the double-layer liquid distributor is provided with a tube plate.

3. The evaporator structure on an organic solvent recovery unit of claim 1, wherein: The diameter of the lower liquid distribution disc is matched with the inner diameter of the tower body, a plurality of groups of plate holes are uniformly arranged on the bottom hole plate of the lower liquid distribution disc, a plurality of groups of heat exchange pipes are uniformly connected to the tube plate, and each group of plate holes is arranged at the center of three groups of heat exchange pipes.

4. The evaporator structure on an organic solvent recovery unit of claim 1, wherein: The baffles are arranged at intervals of 1.2 m.

5. The evaporator structure on an organic solvent recovery unit of claim 1, wherein: A gas-liquid separator is arranged at the connecting position of the middle evaporation section and the bottom discharging section, an annular wire mesh is arranged on the gas-liquid separator, and flushing nozzles are arranged on the upper and lower sides of the annular wire mesh.

6. The evaporator structure on an organic solvent recovery unit of claim 1, wherein: A circulating discharging pipe is connected below the bottom discharging section, the circulating discharging pipe is communicated with the circulating feeding pipe, and a circulating pump is connected between the circulating feeding pipe and the circulating discharging pipe.

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