CN210495257U - Horizontal tube falling film evaporator with compact structure - Google Patents

Abstract

The utility model discloses a compact structure's horizontal pipe falling film evaporation ware belongs to the evaporimeter field. The utility model aims at providing a level pipe falling film evaporation ware of arranging perpendicularly of compact structure height, the whole transportation of being convenient for. Its technical scheme is as follows, including at least one evaporimeter effect body, each evaporimeter effect body all includes an evaporimeter main part, each evaporimeter main part links to each other in proper order, each evaporimeter main part includes heating chamber, back hydroecium, preceding hydroecium and steam pipeline group, its characterized in that: the evaporator effect bodies are mutually connected through the composition board to form an evaporator box body; a plurality of heat exchange tube sets are arranged in the heating chamber, the heat exchange tube sets are horizontally arranged by a plurality of heat exchange tubes and are arranged in a row, the heat exchange tube sets arranged in the row are vertically arranged in the evaporator main body, and each heat exchange tube set is divided into a first heat exchange tube set and a second heat exchange tube set; one end of the heat exchange tube is connected with the steam inlet side pipeline in an expansion mode, and the other end of the heat exchange tube is connected with the steam outlet side pipeline in an expansion mode.

Description

Horizontal tube falling film evaporator with compact structure

Technical Field

The utility model relates to an evaporimeter technical field, more specifically say, it relates to a compact structure's horizontal pipe falling film evaporation ware.

Background

Evaporation is the unit operation of heating a solution containing a non-volatile solute to boiling conditions, causing a portion of the solvent to vaporize and be removed, thereby increasing the concentration of the solute in the solvent. In industrial production, evaporation operations are often used to obtain pure solvents, such as desalination of sea water, purification of industrial waste water, etc.

The evaporator is essentially a heat exchanger, in which the material and heat source (steam) are heat exchanged, part of solvent (generally water) in the material is changed into gas state, separated out, the concentration of the material is increased, and the purpose of evaporation concentration is achieved. The heat exchange tubes adopted by the traditional horizontal tube falling film evaporator are round tubes, and all round tubes are arranged in a rectangular array or a triangular array. However, in the evaporator in the prior art, a liquid film bias flow phenomenon and a liquid splashing phenomenon are generated in an evaporation process, and the heat energy utilization efficiency of steam is general.

The existing Chinese patent with the application number of CN201420854127.5 discloses a multi-effect horizontal tube falling film evaporator, which solves the problems. The evaporator comprises at least two evaporator effect bodies, wherein each evaporator effect body comprises an evaporator main body, and each evaporator main body comprises a heater and a rear water chamber connected with the heater; the outlet of the rear water chamber of the last evaporator main body is connected with the heating steam inlet of the next adjacent evaporator main body, the outlet of the rear water chamber of the evaporator main body positioned at the rearmost part is connected with the air inlet of a compressor, and the air outlet of the compressor is connected with the heating steam inlet of the evaporator main body positioned at the frontmost part through a steam conveying pipeline; the heater comprises a heat exchange tube with a horizontal line on the central axis, the lower end of the heat exchange tube is provided with a guide plate, and the central line of the guide plate and the central axis of the heat exchange tube are positioned on the same vertical plane.

In the above prior art scheme, in order to realize the recycling of the heat energy of the evaporator of each effect, the evaporator of each effect body is horizontally placed and connected with the compressor, each heater comprises a heat exchange tube with a horizontal line central axis, the lower end of each heat exchange tube is provided with a guide plate, and the central line of the guide plate and the central axis of the heat exchange tube are positioned on the same vertical plane for reducing the liquid splashing phenomenon. However, the technical scheme does not improve the overall layout structure of the horizontal pipe of the traditional evaporator, so that the whole multi-effect evaporator occupies a large area and is inconvenient for overall transportation of the evaporator.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a satisfy the not enough of prior art existence, the utility model discloses a satisfy the horizontal pipe falling film evaporation ware of arranging perpendicularly of the high compactness of structure, the whole transportation of being convenient for.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a horizontal tube falling-film evaporator with a compact structure comprises at least one evaporator effect body, wherein each evaporator effect body comprises an evaporator main body, the evaporator main bodies are sequentially connected, each evaporator main body comprises a heating chamber, a rear water chamber, a front water chamber and a steam pipeline group, and the evaporator effect bodies are mutually connected through a combination board to form an evaporator box body; a heater and a plurality of heat exchange tube sets are arranged in the heating chamber, the heat exchange tube sets are horizontally arranged by a plurality of heat exchange tubes and are arranged in a row, the heat exchange tube sets arranged in the row are vertically arranged in the evaporator main body, and each heat exchange tube set is divided into a first heat exchange tube set and a second heat exchange tube set; one end of the heat exchange tube is connected with the steam inlet side pipeline in an expansion mode, and the other end of the heat exchange tube is connected with the steam outlet side pipeline in an expansion mode.

By adopting the technical scheme, the internal structure of each evaporator effect body is reasonably arranged, the heat exchange tubes are horizontally arranged and arranged in rows, and the heat exchange tubes arranged in rows are vertically arranged into the first heat exchange tube group and the second heat exchange tube group. The evaporator main body structure is formed by the rear water chamber, the heater, the condenser, the steam pipeline group and the like, the layout of the evaporator main body is a rectangular three-dimensional structure, and the overall structure is compact. After the heat exchange tubes are communicated with the steam pipeline, the feed liquid is added from the heating chamber of the falling film evaporator and can be uniformly distributed into each heat exchange tube through the liquid distribution and film forming device, and the falling film effect is more stable. The evaporator bodies are sequentially connected to form an evaporator body, and the evaporator body can be connected through the combined plates to form an integral box body, so that integral transportation is facilitated.

Furthermore, the combined plate is divided into a bottom plate assembly, a front sealing plate assembly, a left side plate assembly, a rear sealing plate assembly, a right side plate assembly and a top plate assembly, and all the assembly plates are sequentially connected to form the evaporator box body.

Through adopting above-mentioned technical scheme, under the prerequisite of arranging whole evaporimeter major structure, the mounting plate subassembly, then connect four side board subassemblies such as preceding shrouding subassembly, left side board subassembly, back shrouding subassembly, right side board subassembly respectively, the last mounting roof subassembly with, form the evaporimeter box. The evaporator body of each effect body is wrapped in the evaporator box body, so that the main structure of the evaporator can be protected, and the integral transportation and installation operation can be facilitated.

Further, the first-effect evaporator main body and the second-effect evaporator main body are separated by a first partition plate assembly, and the second-effect evaporator main body and the third-effect evaporator main body are separated by a second partition plate assembly.

Through adopting above-mentioned technical scheme, the evaporimeter main part that will every imitate is separated through the baffle subassembly, and each imitates all to have connecting line between the body, arranges according to actual pipeline, is equipped with the place that connecting line passes through on each baffle subassembly. Therefore, the single-bin protection effect can be achieved on each evaporator main body, and the working operation of each effect evaporator effect body is not influenced.

Furthermore, a lifting support is arranged on the rear sealing plate component.

By adopting the technical scheme, the evaporator is conveniently hoisted by the hoisting support when the evaporator is integrally transported by using the hoisting machine, and the evaporator can be hoisted to a transport vehicle or a transport platform of the evaporator from the transport vehicle by using a fixed and supported point. The external structure of the rear sealing plate is less, and the appearance is not influenced, so that the lifting support is arranged at the rear sealing plate.

Furthermore, the steam inlet side pipeline and the steam outlet side pipeline are arranged at two ends of the heat exchange pipe in parallel and are arranged in an S shape to be connected with the heat exchange pipe group of each row.

By adopting the technical scheme, the steam pipeline and the heat exchange pipe are connected in series, and a certain amount of steam is introduced, so that the evaporated and condensed channel is longer, and the heat efficiency of the system is better; and the evaporation temperature of the industrial wastewater of the latter effect is lower than that of the former effect to a greater extent, so that distilled water with the amount of times of steam is obtained.

Furthermore, each heat exchange tube of the heat exchange tube set is a titanium tube with the wall thickness of 0.3-0.5 mm.

Through adopting above-mentioned technical scheme, titanium pipe itself has heat transfer effect, through arranging heat exchange tube group vertically for the heat transfer area increase, the compact structure of unit volume. The titanium tube with the wall thickness of 0.3-0.5 mm can achieve good thermal efficiency, and meanwhile, the metal consumption is reduced, and the heat transfer coefficient is higher.

Further, the left side board subassembly the right side board subassembly the first baffle subassembly with second baffle subassembly inner wall surface is equipped with the breakwater, the breakwater divide into breakwater and lower breakwater, go up the breakwater with be equipped with a plurality of guiding gutters on the breakwater down, it is close to go up the breakwater first heat exchange tube group upper end, the breakwater is close to down the second heat exchange tube group upper end.

Through adopting above-mentioned technical scheme, curb plate subassembly and the baffle subassembly inner wall on left and right side all are equipped with a water baffle and an upper water baffle, and upper water baffle is close to first heat exchange tube group, and lower water baffle is close to second heat exchange tube group, can more comprehensively, effectually prevent splashing of material liquid. The diversion trenches arranged on the upper and lower water baffles can divert the liquid flowing or splashing on the water baffles back to the pipeline.

Furthermore, a U-shaped pipe is arranged in the heat exchange pipe group, one end of the U-shaped pipe is connected with the front water chamber, and the other end of the U-shaped pipe is connected with the heat exchange pipe group; the air pumping pipeline extends into the heating chamber and is connected with the air extractor.

Through adopting above-mentioned technical scheme, material water in the evaporation process can get into next effect through U type pipe, and in falling liquid film evaporation process, can produce some noncondensable gas, and noncondensable gas can pass through the bleeder line with U type union coupling and separate away through the aspirator, reduces evaporimeter internal pressure.

To sum up, the utility model discloses following beneficial effect has:

1. through the connection and the arrangement of the combined plates, the evaporators with various effects can be combined and connected into a whole box body, the separation of the partition plate assemblies is also arranged between the effects, the structure of the evaporators with various effects can be protected, and the whole transportation of the evaporators can be facilitated.

2. Through the setting of lifting by crane the support, can play in whole transportation, the lifting machine can have a fixed, the strong point of connection with the evaporimeter box, reaches the convenient effect of transportation and installation.

3. Through the heat exchange tube group vertically arranged, the internal space of the heat exchanger is more compact, the heat transfer effect is better, the heat transfer requirement of the heat exchange tube can be met only by adopting a small-diameter titanium tube with the wall thickness of 0.34-0.38, and meanwhile, the material is saved.

Drawings

FIG. 1 is a schematic structural diagram of an integral case of an evaporator in the embodiment.

FIG. 2 is a schematic top view of the overall structure of the steam generator in the example.

Fig. 3 is a schematic cross-sectional view of an evaporator showing a vertical arrangement of heat exchange tubes.

Fig. 4 is a schematic view of the channels on the splash plate.

Fig. 5 is a sectional view for showing the expansion-connection relationship between the heating pipe and the steam inlet-side pipe and the steam outlet-side pipe.

FIG. 6 is a schematic diagram showing the positional relationship of the U-shaped pipe in the steam generator box in the embodiment.

FIG. 7 is a schematic view of the connection of a steam tube panel tubing set to a heat exchange tubing set.

In the figure, 1, an evaporator effect body; 2. an evaporator main body; 21. a first effect evaporator body; 22. a secondary evaporator main body; 23. a triple effect evaporator body; 3. a heating chamber; 31. a heat exchange pipe; 32. a heat exchange tube set; 33. a first heat exchange tube set; 34. a second heat exchange tube set; 4. a steam pipeline group; 41. a first steam inlet; 42. a steam inlet side pipeline; 43. a steam outlet side pipeline; 5. an evaporator case; 51. a composition board; 511. a base plate assembly; 512. a front closure plate assembly; 513. a left side plate assembly; 514. a rear closure plate assembly; 515. a right side plate assembly; 516. a top plate assembly; 52. a first baffle plate assembly; 53. a second baffle plate assembly; 6. a rear water chamber; 61. a front water chamber; 7. hoisting and supporting; 8. a water baffle; 81. an upper water baffle; 82. a lower water baffle; 83. a diversion trench; 9. an air extractor; 91. a U-shaped pipe; 92. an air extraction pipeline; 93. a first effect noncondensable gas outlet; 10. a material water pipeline group; 101. a first material water inlet; 102. and a second material water inlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): as shown in figure 1, the horizontal tube falling-film evaporator with compact structure comprises at least one evaporator body 1, wherein each evaporator body 1 comprises an evaporator main body 2, and the evaporator main bodies 2 are connected in sequence. The evaporator effect bodies 1 are connected with each other through the composition plate 51 to form an evaporator box body 5, so that the whole transportation of the evaporator is convenient.

As shown in fig. 1, the composite panel 51 is divided into a bottom panel assembly 511, a front closure panel assembly 512, a left panel assembly 513, a rear closure panel assembly 514 (see fig. 2), a right panel assembly 515 (see fig. 2), and a top panel assembly 516, which are connected in sequence using rivets. Rear closure plate assembly 514 is provided with lifting support 7 for facilitating the fixing and supporting of the crane during later transportation.

As shown in fig. 3, the evaporator main body 2 includes a first-effect evaporator main body 21, a second-effect evaporator main body 22 and a third-effect evaporator main body 23, the first-effect evaporator main body 21 and the second-effect evaporator main body 22 are separated by a first partition plate assembly 52, the second-effect evaporator main body 22 and the third-effect evaporator main body 23 are separated by a second partition plate assembly 53, and a single-bin protection effect can be achieved for each evaporator main body 1.

As shown in fig. 3, the first-effect evaporator main body 21, the second-effect evaporator main body 22, and the third-effect evaporator main body 23 each include a heating chamber 3, a rear water chamber 6 (see fig. 1), and a front water chamber 61.

As shown in fig. 3, a plurality of heat exchange tube groups 32 are provided in the heating chamber 3. The heat exchange tube group 32 is formed by horizontally arranging a plurality of heat exchange tubes 31 in a row, and the heat exchange tube group 32 in the row is vertically arranged in the evaporator main body 2. After the heat exchange tube set 32 is vertically arranged, the internal structure of the evaporator main body 2 is more compact, and the heat transfer effect is better. Each heat exchange tube 31 of the heat exchange tube group 32 is a titanium tube with the wall thickness of 0.3-0.5 mm, so that the purpose of horizontal falling film of the heat exchange tube is met, and space and materials are saved. Each heat exchange tube group 32 is divided into a first heat exchange tube group 33 and a second heat exchange tube group 34. One end of the heat exchange tube 31 is expanded and connected with a steam inlet side pipeline 42 (see fig. 5), and the other end is expanded and connected with a steam outlet side pipeline 43 (see fig. 5).

As shown in FIG. 7, the steam inlet side pipeline 42 and the steam outlet side pipeline 43 are arranged at two ends of the heat exchange tube 31 in parallel and are connected with the heat exchange tube group 32 in each row in an S-shaped arrangement, and after a certain amount of steam is introduced, the evaporation and condensation channels are longer, so that the system has better heat efficiency.

As shown in fig. 3, the inner wall surfaces of the left side plate assembly 513, the right side plate assembly 515, the first barrier assembly 52 and the second barrier assembly 53 are provided with water baffles 8. The water baffle 8 is divided into an upper water baffle 81 and a lower water baffle 82 which can block splashed liquid, a plurality of guide grooves 83 (see fig. 4) are arranged on the upper water baffle 81 and the lower water baffle 82, and when water falls into or splashes on the water baffle 8, the water can flow down along the guide grooves 83. The upper water baffle 81 is close to the upper end of the first heat exchange tube group 33, and the lower water baffle 82 is close to the upper end of the second heat exchange tube group 34, so that splashed liquid generated by the first heat exchange tube group 33 and the second heat exchange tube group 34 can be retained.

As shown in fig. 6, an air extractor is provided outside the evaporator box, an air extraction pipe 92 is connected to the air extractor 9, the air extraction pipe 92 extends into the heating chamber 3, and the air extractor 9 extracts out the non-condensable gas generated in the evaporation process through the air extraction pipe 92. Be equipped with U type pipe 91 in the heat exchange tube group 32, U type pipe 91 one end is connected with preceding hydroecium 61, and the other end is connected with heat exchange tube group 32, and the material water in with the evaporation process gets into next effect through U type pipe 91.

The specific implementation process comprises the following steps:

the heat exchange tube 31 has one end connected to a steam inlet side pipe 42 and the other end connected to a steam outlet side pipe 43. The tube plate is connected with the heat exchange tube by adopting the principle of expansion with heat and contraction with cold without welding. The pipelines of the steam inlet side pipeline 42 and the pipelines of the steam outlet side pipeline 43 are arranged at two ends of the heat exchange tube 31 in parallel and are arranged in an S shape to be connected with the heat exchange tube group 32 of each row. After a certain amount of steam is introduced through the first steam inlet 41, the steam enters from the steam inlet side pipeline 42 and passes through the heat exchange pipe set 32 to the steam outlet side pipeline 43, and because the heat exchange pipe set 32 is communicated with the steam inlet side pipeline 42 and the steam outlet side pipeline 43, the steam passes through a longer evaporation and condensation channel, and the system thermal efficiency is better. The steam pipeline group 4 is connected with the first steam inlet 41, and the steam outlet of the second effect is connected with the steam pipeline of the first effect, so that the steam generated by the material water of the middle effect can be used together with the steam of the first effect, the cyclic utilization of the steam is realized, and the energy is saved.

The material water can enter the material water pipeline group 10 through the first material water inlet 101 and the second material water inlet of the first effect, then is added from the heating chamber 3 of the first effect of the falling film evaporator, enters the rear water chamber 6 of the first effect, and can be uniformly distributed into the heat exchange tubes 31 through the liquid distribution and film forming device, so that the falling film effect is more stable. One end of the U-shaped pipe 91 is connected with the front water chamber 61, the other end of the U-shaped pipe is connected with the heat exchange pipe group 32, and the evaporated material water enters the next effect through the material water pipeline group 10 and the U-shaped pipe 91.

The first-effect evaporator main body 21 and the second-effect evaporator main body 22 are separated by a first partition plate assembly 52, and the second-effect evaporator main body 22 and the third-effect evaporator main body 23 are separated by a second partition plate assembly 53, so that the effect of protecting the single chamber of each-effect evaporator main body 1 is achieved. The inner wall surfaces of the left side plate assembly 513, the right side plate assembly 515, the first partition plate assembly 52 and the second partition plate assembly 53 are all provided with water baffles 8 which can block splashed liquid, and the upper water baffle 81 and the lower water baffle 82 are provided with a plurality of diversion grooves 83 which can flow down along the diversion grooves 83 after water falls into or splashes on the water baffles 8. The splash liquid generated by the first and second heat exchange tube groups 33 and 34 is retained.

The air pumping pipeline 92 extends into the heating chamber 3, the air pumping pipeline 92 is connected with the air pump 9, and the air pump 9 pumps out the non-condensable gas generated in the evaporation process through the air pumping pipeline 92. The mass of the non-condensable gas is light, and a single-effect non-condensable gas outlet 93 is also arranged around a material water inlet of the single-effect evaporator, so that the non-condensable gas which cannot be liquefied in the initial material water can be intensively discharged out of the evaporator body through the single-effect non-condensable gas outlet 93 under the action of the air extractor.

The combination plates 51 are connected in sequence through rivets, and an evaporator box body is formed on the whole periphery formed by the evaporator effect bodies 1, so that the whole transportation of the horizontal tube falling film evaporator is facilitated. And a hoisting support 7 is arranged on the rear sealing plate assembly 514 and is used for facilitating the fixation and support of the crane in the later transportation process.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (8)

1. The utility model provides a compact structure's horizontal pipe falling film evaporation ware, includes at least one evaporimeter effect body (1), each said evaporimeter effect body (1) all includes an evaporimeter main part (2), each said evaporimeter main part (2) links to each other in proper order, each said evaporimeter main part (2) include heating chamber (3), back hydroecium (6), preceding hydroecium (61) and steam pipeline group (4), its characterized in that: the evaporator effect bodies (1) are connected with each other through a composition plate (51) to form an evaporator box body (5); a plurality of heat exchange tube sets (32) are arranged in the heating chamber (3), the heat exchange tube sets (32) are horizontally arranged by a plurality of heat exchange tubes (31) and are arranged in rows, the heat exchange tube sets (32) arranged in rows are vertically arranged in the evaporator main body (2), and each heat exchange tube set (32) is divided into a first heat exchange tube set (33) and a second heat exchange tube set (34); one end of the heat exchange tube (31) is connected with the steam inlet side pipeline (42) in an expanding mode, and the other end of the heat exchange tube is connected with the steam outlet side pipeline (43) in an expanding mode.

2. A compact horizontal tube falling film evaporator as set forth in claim 1 in which: the combined plate (51) is divided into a bottom plate component (511), a front sealing plate component (512), a left side plate component (513), a rear sealing plate component (514), a right side plate component (515) and a top plate component (516), and all the component plates are sequentially connected to form the evaporator box body (5).

3. A compact horizontal tube falling film evaporator as set forth in claim 2 in which: the first effect evaporator main body (21) and the second effect evaporator main body (22) are separated by a first partition plate assembly (52), and the second effect evaporator main body (22) and the third effect evaporator main body (23) are separated by a second partition plate assembly (53).

4. A compact horizontal tube falling film evaporator as set forth in claim 2 in which: and a hoisting support (7) is arranged on the rear sealing plate assembly (514).

5. A compact horizontal tube falling film evaporator as set forth in claim 1 in which: the steam inlet side pipeline (42) and the steam outlet side pipeline (43) are arranged at two ends of the heat exchange pipe (31) in parallel and are arranged in an S shape to be connected with each row of heat exchange pipe sets (32).

6. A compact horizontal tube falling film evaporator as set forth in claim 1 in which: each heat exchange tube (31) of the heat exchange tube set (32) is a titanium tube with the wall thickness of 0.3-0.5 mm.

7. A compact horizontal tube falling film evaporator as set forth in claim 3 in which: the heat exchanger is characterized in that a water baffle (8) is arranged on the surface of the inner wall of the left side plate assembly (513), the right side plate assembly (515), the first partition plate assembly (52) and the second partition plate assembly (53), the water baffle (8) is divided into an upper water baffle (81) and a lower water baffle (82), the upper water baffle (81) and the lower water baffle (82) are provided with a plurality of diversion trenches (83), the upper water baffle (81) is close to the upper end of the first heat exchange pipe set (33), and the lower water baffle (82) is close to the upper end of the second heat exchange pipe set (34).

8. A compact horizontal tube falling film evaporator as set forth in claim 1 in which: a U-shaped pipe (91) is arranged in the heat exchange pipe set (32), one end of the U-shaped pipe (91) is connected with the front water chamber (61), and the other end of the U-shaped pipe (91) is connected with the heat exchange pipe set (32); the air suction pipeline (92) extends into the heating chamber (3), and the air suction pipeline (92) is connected with the air ejector (9).

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