CN216136703U - Spiral plate type falling film evaporator - Google Patents

Abstract

The utility model discloses a spiral plate type falling film evaporator which comprises a heating chamber, wherein a spiral plate type heater is arranged in the heating chamber, the spiral plate type heater is formed by parallelly rolling two plates into mutually separated spiral channels, and the top and the bottom of the spiral plate type heater are sealed; the interior of the spiral channel is used for introducing heating steam, and the outer wall of the spiral channel is contacted with the material; the steam inlet pipe is communicated with the spiral channel through a steam quick-connection sealing head, so that the steam and the material are isolated and sealed; the steam inlet pipe is tangent to the spiral channel, so that the local resistance is reduced. The evaporator has the advantages of high heat transfer efficiency, large heat transfer area, difficult scaling, easy cleaning, compact structure, easy processing and the like.

Description

Spiral plate type falling film evaporator

Technical Field

The utility model particularly relates to a spiral plate type falling film evaporator.

Background

The most commonly used conventional evaporators are divided wall type evaporators, and can be roughly classified into a circulation type and a single-pass type according to the residence of the solution in the evaporator. The circulating evaporator has high boiling point, low effective temperature difference and low efficiency. The single-pass liquid membrane evaporator overcomes the above disadvantages, but is not suitable for materials which are easy to crystallize and scale. The heating surfaces of the two types of evaporators are provided by the vertical long pipes, so that the sectional area ratio of the heating pipe to the heating chamber is not high, and the processing, cleaning and maintenance costs are high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the spiral plate type falling film evaporator which has the advantages of high heat transfer efficiency, large heat transfer area, difficult scaling, easy cleaning, compact structure, easy processing, low cost and the like.

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

a spiral plate type falling film evaporator comprises a heating chamber, wherein a spiral plate type heater is arranged in the heating chamber, the spiral plate type heater is formed by winding two plates in parallel to form mutually separated spiral channels, and the top and the bottom of the spiral plate type heater are closed; the interior of the spiral channel is used for introducing heating steam, and the outer wall of the spiral channel is contacted with the material; one end of the spiral channel is connected with a steam inlet pipe, and the steam inlet pipe is tangent to the spiral channel, so that the local resistance is reduced.

Furthermore, the steam inlet pipe is communicated with the spiral channel through a steam quick-connection sealing head, so that the isolation and sealing of steam and materials are realized.

Furthermore, the device also comprises an evaporation chamber which is positioned at the upper part of the heating chamber.

Further, the liquid distributor is also included and is positioned at the lower part of the evaporation chamber.

Furthermore, the device also comprises an upper end enclosure, and the lower part of the upper end enclosure is connected with the evaporation chamber.

Furthermore, the heating chamber also comprises a lower end enclosure, and the lower part of the heating chamber is connected with the lower end enclosure.

Furthermore, the upper part of the upper end enclosure is provided with a secondary steam outlet pipeline.

Further, the evaporation chamber is provided with a feed conduit for feeding the material to the evaporation chamber.

Furthermore, the heating chamber is provided with an outer layer pipeline of a steam inlet.

Further, the lower end enclosure is connected with a discharge pipeline.

Furthermore, a steam inlet pipe flange is connected with a steam inlet outer layer pipeline flange, the tail of the steam inlet pipe is fixed by a steam quick-connection sealing head, and the steam inlet pipe is communicated with the spiral channel to realize the isolation and sealing of steam and materials.

The utility model has the beneficial effects that:

(1) the utility model adopts the spiral plate wall as the heat transfer surface, and the heat transfer area is greatly increased compared with the tube array type; the steam inlet pipe is tangent to the spiral channel, so that the fluid resistance is reduced, a higher flow speed is allowed, and the heat transfer efficiency is improved.

(2) The double-layer flange quick-connection sealing structure is adopted, the steam inlet pipe can be quickly connected and separated with the spiral plate type heater and the heating chamber, and the cleaning and maintenance are convenient while the isolation sealing effect is realized.

(3) According to the utility model, the steam channel inlet is arranged on the side surface, and the quick connector is arranged at the steam inlet and the steam outlet, so that the steam channel can be quickly disassembled, and is convenient to maintain and clean; the concentrated solution channel is an open channel, is communicated with the heating chamber, directly receives the falling film evaporation of the solution from the liquid distributor, and is not easy to block. The utility model has the advantages of cheap and easily obtained materials, easy processing and low cost.

Drawings

Fig. 1 is a schematic structural diagram of a spiral plate falling film evaporator.

Fig. 2 is a schematic structural view of a spiral plate heater.

Reference numbers in the figures: the device comprises an upper seal head 1, an evaporation chamber 2, a liquid distributor 3, a heating chamber 4, a steam inlet pipe 5, a spiral plate type heater 6 and a lower seal head 7; the heating chamber steam inlet outer layer pipeline flange 4a, the steam inlet pipe flange 5a and the steam inlet quick-connection sealing head 6 a.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

A spiral plate type falling film evaporator comprises a heating chamber 4, a spiral plate type heater 6 is arranged in the heating chamber 4, the spiral plate type heater 6 is formed by parallelly rolling two plates to form mutually separated spiral channels, and the top and the bottom of the spiral plate type heater are closed; heating steam is introduced into the spiral channel, the outer wall of the spiral channel is in contact with the material, and the material forms film evaporation on the outer wall surface of the spiral channel. The plate spacing and the screw pitch of the two plates can be adjusted according to actual requirements, so that the cleaning and maintenance are facilitated, and scaling is avoided.

In some preferred forms, the heating chamber 4 is provided with an outer conduit 8 for steam inlet.

In some preferred modes, one end of the spiral channel is connected with a steam inlet pipe 5, and the steam inlet pipe 5 is communicated with the spiral channel through a steam quick-connection sealing head, so that the isolation and the sealing of steam and materials are realized. Specifically, a steam inlet pipe flange 5a is in bolted connection with a steam inlet outer layer pipeline flange 4a on the heating chamber 4, the tail of a steam inlet pipe 5 is fixed by a steam quick-connection sealing head 6a of the spiral plate type heater 6, and the steam inlet pipe 5 is communicated with a spiral channel, so that the isolation and sealing of steam and materials are realized.

In some preferred ways, the steam inlet pipe 5 is tangential to the spiral path, reducing the local resistance. In some embodiments, the steam inlet pipe 5 is tangential to the spiraled sheet, with low local resistance, uniform curvature of the spiraled channels, and low overall resistance, allowing it to increase the flow velocity to increase heat transfer capacity.

In some preferred modes, the falling film evaporator further comprises an evaporation chamber 2, and the evaporation chamber 2 is positioned at the upper part of the heating chamber 4.

In some preferred modes, the falling film evaporator further comprises a liquid distributor 3, and the liquid distributor 3 is positioned at the lower part of the evaporation chamber 2. The liquid distributor 3 can uniformly distribute the materials on the outer wall of the spiral channel. In some preferred forms, the liquid distributor 3 is provided with a plurality of circular holes. In other embodiments, other shapes of distributors can be used, and the main purpose is to distribute the material uniformly on the outer wall of the spiral channel, so as to avoid local concentration and influence on evaporation efficiency. The utility model combines the liquid distributor and the open type spiral evaporation channel, improves the evaporation efficiency, reduces the possibility of blockage, and is convenient to overhaul and clean.

In some preferred modes, the falling film evaporator further comprises an upper head 1, and the lower part of the upper head 1 is connected with an evaporation chamber 2. In some preferred modes, a secondary steam outlet pipeline is arranged at the upper part of the upper sealing head 1.

In some preferred modes, the falling film evaporator further comprises a lower end socket 7, and the lower part of the heating chamber 4 is connected with the lower end socket 7. In some preferred modes, the lower end socket 7 is connected with a discharge pipeline.

In some preferred ways, the evaporation chamber 2 is provided with a feed conduit for feeding material to the evaporation chamber 2. In some preferred modes, a condensate pipe is connected to the bottom of the spiral plate type heater 6 and is used for discharging condensate water.

The working principle and the process are as follows:

during operation, materials enter the evaporation chamber 2 through the feeding hole of the feeding pipeline, the materials fall to be in contact with the spiral plate type heater 6 under the action of gravity and descend in a film shape along the spiral plate wall (namely the outer wall of the spiral channel), heating steam enters the spiral channel from the steam inlet pipe 5 at a high flow rate in a tangential direction, the materials are heated through the plate wall, the materials are evaporated and concentrated in the process, secondary steam formed by evaporation rises and is discharged from the secondary steam outlet pipeline of the upper end enclosure 1, concentrated solution formed by evaporation is collected after descending and is discharged from the outlet of the discharge pipeline of the lower end enclosure 7, and condensed water of the heating steam is discharged through the condensed water pipe at the bottom of the spiral plate type heater 6.

The spiral plate type falling-film evaporator introduced by the utility model is used for treating organic liquid (in the embodiment, the organic liquid is isobutane), and the test shows that the efficiency of the spiral plate type falling-film evaporator is greatly improved on the basis of the traditional evaporator under the condition of the same flow rate (the flow rate of media on two sides is 30m/s, the flow rate of liquid is 0.8m/s), the total heat transfer coefficient of the spiral plate type falling-film evaporator is 1200W/(. square-meter-), and the total heat transfer coefficient of the common tubular evaporator is 700W/(. square-meter-), so that the utility model has the advantages of compact structure, smaller volume, difficult scaling, easy cleaning and maintenance, and high economic value and popularization significance.

It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. A spiral plate type falling film evaporator is characterized by comprising a heating chamber, wherein a spiral plate type heater is arranged in the heating chamber, the spiral plate type heater is formed by parallelly rolling two plates into mutually separated spiral channels, and the top and the bottom of the spiral plate type heater are sealed; the interior of the spiral channel is used for introducing heating steam, and the outer wall of the spiral channel is contacted with the material; one end of the spiral channel is connected with a steam inlet pipe, and the steam inlet pipe is tangent to the spiral channel, so that the local resistance is reduced.

2. A spiral plate falling film evaporator as claimed in claim 1 wherein the steam inlet tube communicates with the spiral passage through a steam quick-connect seal to provide a separate seal between the steam and the material.

3. A spiral plate falling film evaporator according to claim 1 further comprising an evaporation chamber located at an upper portion of the heating chamber.

4. A spiral plate falling film evaporator according to claim 3 further comprising a liquid distributor located in the lower portion of the evaporation chamber.

5. A spiral plate falling film evaporator according to claim 3 further comprising an upper head, the lower portion of the upper head being connected to the evaporation chamber.

6. A spiral plate falling film evaporator as claimed in claim 1 further comprising a lower head, the lower part of the heating chamber being connected to the lower head, the lower head being connected to a discharge conduit.

7. A spiral plate falling film evaporator as claimed in claim 5 wherein the upper end enclosure is provided with a secondary steam outlet conduit.

8. A spiral plate falling film evaporator according to claim 3 wherein the evaporation chamber is provided with a feed conduit for feeding material to the evaporation chamber.

9. A spiral plate falling film evaporator as claimed in claim 1 wherein the heating chamber is provided with an outer conduit for the steam inlet.

10. A spiral plate falling film evaporator as claimed in claim 9 wherein the flange of the steam inlet pipe is connected with the flange of the outer pipe of the steam inlet, the tail of the steam inlet pipe is fixed by the steam quick-connecting sealing head, and the steam inlet pipe is communicated with the spiral channel to realize the isolation and sealing of the steam and the material.

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