CN103285607A - Pipe-type falling-film evaporator - Google Patents

Pipe-type falling-film evaporator Download PDF

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Publication number
CN103285607A
CN103285607A CN2013101877177A CN201310187717A CN103285607A CN 103285607 A CN103285607 A CN 103285607A CN 2013101877177 A CN2013101877177 A CN 2013101877177A CN 201310187717 A CN201310187717 A CN 201310187717A CN 103285607 A CN103285607 A CN 103285607A
Authority
CN
China
Prior art keywords
heat exchanger
exchanger tube
layout area
pipe
perforated plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013101877177A
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Chinese (zh)
Inventor
李刚
朱亮
潘晓
钱季春
徐伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Zhongheng Pressure Vessel Manufacture Co Ltd
Original Assignee
Suzhou Zhongheng Pressure Vessel Manufacture Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Zhongheng Pressure Vessel Manufacture Co Ltd filed Critical Suzhou Zhongheng Pressure Vessel Manufacture Co Ltd
Priority to CN2013101877177A priority Critical patent/CN103285607A/en
Publication of CN103285607A publication Critical patent/CN103285607A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a pipe-type falling-film evaporator. The pipe-type falling-film evaporator comprises a heating chamber shell, wherein heat-exchange pipes are arranged in the heating chamber shell; the heating chamber shell comprises a heating chamber drum body; an upper pipe plate is welded at the upper end of the heating chamber drum body; a lower pipe plate is welded at the lower end of the heating chamber drum body; a plurality of sector-shaped upper heat-exchange pipe distributing areas are distributed on the upper pipe plate; each sector-shaped upper heat-exchange pipe distributing area consists of a plurality of penetrating holes which are matched to the outer diameters of the heat-exchange pipes; corresponding to the plurality of sector-shaped upper heat-exchange pipe distributing areas and the penetrating holes, the lower pipe plate is provided with a plurality of sector-shaped lower heat-exchange pipe distributing areas and penetrating holes forming the lower heat-exchange pipe distribution areas. The heat-exchange pipes penetrate through the corresponding penetrating holes in the upper heat-exchange pipe distributing areas and the lower heat-exchange pipe distributing areas, and are respectively welded with the upper pipe plate and the lower pipe plate; a heating chamber is formed among the upper pipe plate, the lower pipe plate, the heating chamber drum body and the pipe walls of the heat-exchange pipes. The pipe-type falling-film evaporator disclosed by the invention has the advantages that a condensing water pipe is welded between adjacent lower heat-exchange pipe distributing areas on the corresponding lower pipe plate in the heating chamber, so that the problem of easy leakage at the welding joints of welding angles of the condensing water pipe is solved.

Description

A kind of tube-type down-flow evaporator
Technical field
The present invention relates to a kind of tube-type down-flow evaporator.
Background technology
At present, the tube type falling-film evaporation is indispensable production process in the alumina producing industry, and its main purpose is that redundant moisture in the production solution is carried out evaporation and concentration, improves the concentration of solution, makes it to satisfy production technology to the requirement of solution concentration.The operation principle of tube-type down-flow evaporator is: by feed steam in heating clamber, the production liquid in the exchange heat pipe carries out heating evaporation.
In the heating clamber of existing tube-type down-flow evaporator, angle welding place and the condensate pipe of heating clamber stack shell and lower perforated plate are welded to connect.Owing to producing the not equal reason of solution corrosion and heat exchanger tube and the heating clamber housing temperature difference coefficient of expansion, the angle welding place that condensate pipe is connected with the heating clamber housing generates crackle, causes the condensed water seepage in actual production process.Adopt the condensate pipe of traditional S shape structure, according to the structural relation of itself and stack shell, lower perforated plate, the commissure of condensate pipe is difficult to reach technological requirement when carrying out destressing heat treatment, thereby in use this place is corroded easily, causes the condensed water seepage.
Summary of the invention
The technical problem that the present invention solves: provide a kind of condensed water to be not easy the tube-type down-flow evaporator of seepage.
Technical scheme provided by the invention: a kind of tube-type down-flow evaporator, comprise the heating clamber housing, be provided with many heat exchanger tubes in the heating clamber housing, the heating clamber housing comprises the heating clamber stack shell, the upper end of heating clamber stack shell is welded with upper perforated plate, the lower end of heating clamber stack shell is welded with lower perforated plate, be distributed with several fan-shaped heat exchanger tube layout area that goes up on the upper perforated plate, the fan-shaped heat exchanger tube layout area that goes up is made up of a plurality of perforation suitable with the heat exchanger tube external diameter, be distributed with at least two fan-shaped heat exchanger tube layout area down on the lower perforated plate, fan-shaped heat exchanger tube layout area down is made up of a plurality of perforation suitable with the heat exchanger tube external diameter, last heat exchanger tube layout area and following heat exchanger tube layout area correspondence, the perforation of the perforation of heat exchanger tube layout area and the following heat exchanger tube layout area of composition is corresponding one by one on the composition, heat exchanger tube passes on the correspondence, correspondence in following heat exchanger tube layout area perforation and respectively with last, lower perforated plate welds together, upper perforated plate, lower perforated plate, form heating clamber between heating clamber stack shell and the heat exchanger tube tube wall, in heating clamber, be welded with a condensate pipe between the adjacent following heat exchanger tube layout area on the corresponding lower perforated plate.
Described condensate pipe adopts L shaped structure.
Weld seam between described condensate pipe and the lower perforated plate is heat treated through destressing.
Perforation in the described upper and lower heat exchanger tube layout area all is equally distributed.
The described fan-shaped heat exchanger tube layout area that goes up evenly distributes around the upper perforated plate center, and described fan-shaped heat exchanger tube layout area down evenly distributes around the lower perforated plate center.
The described quantity that goes up the heat exchanger tube layout area is that three and area equate, the quantity of following heat exchanger tube layout area also is that three and area equate.
The beneficial effect that the present invention brings: be chosen in and adjacently on the corresponding lower perforated plate of heating clamber of tube-type down-flow evaporator weld condensate pipe between the heat exchanger tube layout area down, solve original condensate pipe welding angle welding place and occurred the problem of leaking easily, and do not influenced the area of heat exchanger tube layout area in the heating clamber.
Condensate pipe adopts L shaped structural shape, and the Technology for Heating Processing of being convenient to condensate pipe is handled, and prevents traditional S shape condensate pipe and is corroded because heat treatment is difficult to reach requirement, easily the problem of leaking.
Weld seam between condensate pipe and the lower perforated plate through destressing heat treatment after, avoided main stress and the weld seam that causes damages, make condensed water can seepage not occur because of bead crack.
Upper and lower heat exchanger tube layout area evenly distributes around the center of upper and lower tube sheet respectively, and the perforation in the upper and lower heat exchanger tube layout area evenly distributes, the heat exchanger tube that is arranged in the tube-type down-flow evaporator is evenly arranged, thereby make the liquid thermally equivalent in the heat exchanger tube, improve the production technology quality of tube-type down-flow evaporator.
Description of drawings
Fig. 1 is structure chart of the present invention;
Fig. 2 is the A-A profile of Fig. 1;
Among Fig. 1-Fig. 2: 1, heating clamber stack shell, 2, upper perforated plate, 3, lower perforated plate, 4, heat exchanger tube layout area down, 6, condensate pipe.
The specific embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.
As illustrated in fig. 1 and 2, a kind of tube-type down-flow evaporator, comprise the heating clamber housing, be provided with many heat exchanger tubes in the heating clamber housing, the heating clamber housing comprises upper end cover, bottom end cover and be arranged on upper end cover and bottom end cover between heating clamber stack shell 1, the upper end of heating clamber stack shell 1 is welded with upper perforated plate 2, the lower end of heating clamber stack shell 1 is welded with lower perforated plate 3, be distributed with several fan-shaped heat exchanger tube layout area that goes up on the upper perforated plate 2, the fan-shaped heat exchanger tube layout area that goes up is made up of a plurality of perforation suitable with the heat exchanger tube external diameter, be distributed with at least two fan-shaped heat exchanger tube layout area 4 down on the lower perforated plate 3, fan-shaped heat exchanger tube layout area 4 down is made up of a plurality of perforation suitable with the heat exchanger tube external diameter, last heat exchanger tube layout area and following heat exchanger tube layout area 4 correspondences, the perforation of the perforation of heat exchanger tube layout area and the following heat exchanger tube layout area 4 of composition is corresponding one by one on the composition, heat exchanger tube passes the corresponding heat exchanger tube layout area that goes up, the perforation of correspondence in the following heat exchanger tube layout area 4 and respectively with upper perforated plate 2, lower perforated plate 3 welds together, upper perforated plate 2, lower perforated plate 3, form heating clamber between heating clamber stack shell 1 and the heat exchanger tube tube wall, be welded with a condensate pipe 6 between certain two adjacent following heat exchanger tube layout area 4 on the corresponding lower perforated plate 3 in heating clamber, condensate pipe 6 is communicated with the external world of heating clambers and evaporimeter.
Condensate pipe 6 adopts L shaped structure, the vertical section of condensate pipe 6 and lower perforated plate 3 weld together, parallel and its outlet of the horizontal segment of condensate pipe 6 and lower perforated plate 3 is towards the outside of stack shell 1, compare with traditional S shape condensate pipe, when heat-treating, according to the structural relation of itself and stack shell 1, lower perforated plate 3, the technology compliance rate of weld seam is greatly improved, thereby avoided in use causing the condensed water leakage problems because the commissure is corroded easily.
Weld seam between condensate pipe 4 and the lower perforated plate 3 is carried out destressing heat treatment, the weld seam of having avoided stress as far as possible and having caused damages, make condensed water can seepage not occur because of bead crack, influence the normal use of heating clamber, and adopt the heat treated words of this structure destressing, easy to operate, can make that the weld seam between condensate pipe 4 and the lower perforated plate 3 reaches technological requirement after destressing, thereby the weld seam that guarantees this place can crackle not appear and cause the condensed water seepage.
In order to improve the production technology quality of tube-type down-flow evaporator, make in the tube-type down-flow evaporator production liquid thermally equivalent in the every heat exchanger tube.In the actual production, can last heat exchanger tube layout area, the perforation in the heat exchanger tube layout area 4 is set to even distribution down, simultaneously the fan-shaped heat exchanger tube layout area that goes up is arranged to evenly distribute around the upper perforated plate center, fan-shaped heat exchanger tube layout area 4 down is arranged to evenly distribute around the lower perforated plate center, heat exchanger tube is evenly distributed, thereby guarantee to produce the thermally equivalent of liquid.
The preferred version that present embodiment adopts is that as shown in Figure 2 the quantity of heat exchanger tube layout area on described is that three and area equate, the quantity of following heat exchanger tube layout area 4 also is that three and area equate.The benefit of Bu Zhiing is to increase the quantity of heat exchanger tube not influencing under the prerequisite of producing the liquid thermally equivalent like this, improves the production efficiency of tube-type down-flow evaporator.

Claims (6)

1. tube-type down-flow evaporator, comprise the heating clamber housing, be provided with many heat exchanger tubes in the heating clamber housing, the heating clamber housing comprises the heating clamber stack shell, the upper end of heating clamber stack shell is welded with upper perforated plate, the lower end of heating clamber stack shell is welded with lower perforated plate, be distributed with at least two fan-shaped heat exchanger tube layout area that go up on the upper perforated plate, the fan-shaped heat exchanger tube layout area that goes up is made up of a plurality of perforation suitable with the heat exchanger tube external diameter, be distributed with some fan-shaped heat exchanger tube layout area down on the lower perforated plate, fan-shaped heat exchanger tube layout area down is made up of a plurality of perforation suitable with the heat exchanger tube external diameter, last heat exchanger tube layout area and following heat exchanger tube layout area correspondence, the perforation of the perforation of heat exchanger tube layout area and the following heat exchanger tube layout area of composition is corresponding one by one on the composition, heat exchanger tube passes on the correspondence, correspondence in following heat exchanger tube layout area perforation and respectively with last, lower perforated plate welds together, upper perforated plate, lower perforated plate, form heating clamber between heating clamber stack shell and the heat exchanger tube tube wall, it is characterized in that: be welded with a condensate pipe between the heat exchanger tube layout area under adjacent on the corresponding lower perforated plate in heating clamber.
2. a kind of tube-type down-flow evaporator according to claim 1, it is characterized in that: described condensate pipe adopts L shaped structure.
3. a kind of tube-type down-flow evaporator according to claim 1 and 2, it is characterized in that: the weld seam between described condensate pipe and the lower perforated plate is heat treated through destressing.
4. a kind of tube-type down-flow evaporator according to claim 1 and 2, it is characterized in that: the perforation in the described upper and lower heat exchanger tube layout area all is equally distributed.
5. a kind of tube-type down-flow evaporator according to claim 4 is characterized in that: the described fan-shaped heat exchanger tube layout area that goes up evenly distributes around the upper perforated plate center, and described fan-shaped heat exchanger tube layout area down evenly distributes around the lower perforated plate center.
6. a kind of tube-type down-flow evaporator according to claim 5 is characterized in that: the described quantity that goes up the heat exchanger tube layout area is that three and area equate, the quantity of following heat exchanger tube layout area also is that three and area equate.
CN2013101877177A 2013-05-18 2013-05-18 Pipe-type falling-film evaporator Pending CN103285607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013101877177A CN103285607A (en) 2013-05-18 2013-05-18 Pipe-type falling-film evaporator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013101877177A CN103285607A (en) 2013-05-18 2013-05-18 Pipe-type falling-film evaporator

Publications (1)

Publication Number Publication Date
CN103285607A true CN103285607A (en) 2013-09-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013101877177A Pending CN103285607A (en) 2013-05-18 2013-05-18 Pipe-type falling-film evaporator

Country Status (1)

Country Link
CN (1) CN103285607A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857144A (en) * 1988-09-02 1989-08-15 Hanover Research Corporation Apparatus for improved top feed distribution for falling film evaporator
CN201449187U (en) * 2009-05-11 2010-05-05 邓浩 Tube type heat exchanger
CN101991966A (en) * 2010-11-22 2011-03-30 苏州市中衡压力容器制造有限公司 Heating device in tubular falling film evaporator
CN102698452A (en) * 2012-05-29 2012-10-03 张家港化工机械股份有限公司 Extraction structure of condensation pipe in tubular falling film evaporator
CN203525344U (en) * 2013-05-18 2014-04-09 苏州市中衡压力容器制造有限公司 Tubular falling-film evaporator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857144A (en) * 1988-09-02 1989-08-15 Hanover Research Corporation Apparatus for improved top feed distribution for falling film evaporator
CN201449187U (en) * 2009-05-11 2010-05-05 邓浩 Tube type heat exchanger
CN101991966A (en) * 2010-11-22 2011-03-30 苏州市中衡压力容器制造有限公司 Heating device in tubular falling film evaporator
CN102698452A (en) * 2012-05-29 2012-10-03 张家港化工机械股份有限公司 Extraction structure of condensation pipe in tubular falling film evaporator
CN203525344U (en) * 2013-05-18 2014-04-09 苏州市中衡压力容器制造有限公司 Tubular falling-film evaporator

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Application publication date: 20130911