JPS6193389A - Downflow thin film vaporizer - Google Patents

Downflow thin film vaporizer

Info

Publication number
JPS6193389A
JPS6193389A JP21436284A JP21436284A JPS6193389A JP S6193389 A JPS6193389 A JP S6193389A JP 21436284 A JP21436284 A JP 21436284A JP 21436284 A JP21436284 A JP 21436284A JP S6193389 A JPS6193389 A JP S6193389A
Authority
JP
Japan
Prior art keywords
heat transmission
flow rate
plate
transmission pipes
hot water
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
JP21436284A
Other languages
Japanese (ja)
Inventor
Isao Ishida
勲 石田
Satoshi Shimanaka
島中 聰
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP21436284A priority Critical patent/JPS6193389A/en
Publication of JPS6193389A publication Critical patent/JPS6193389A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PURPOSE:To reduce the cost while improving the performance by providing a flow rate regulating plate above heat transmission pipes which has holes in it to allow for a proper amount of flow to hit the inner wall of the heat transmission pipes so that the flow rate may be equalized among the heat transmission pipes and a uniform water film may be formed. CONSTITUTION:Hot water 7 flows from the bottom through a secondary pipe 5 and a pump 6, and after reducing its dynamic pressure by a buffle plate 10 in the upper part of a vaporizer shell 1, enters into a flow rate regulating plate 11. Orifices 11a in the same number as that of the heat transmission pipes 3 are provided in the underside of the flow rate regulating plate 11 at such an angle as to cause a collision against the wall of the heat transmission pipes 3, and a side plate extending up to the top of the vaporizer shell 1 on its side. A water level equivalent to the flow resistance of the hot water 7 out of the orifices is maintained. The hot water out of the orifices 11a hits the wall surface of the pipes 3, and flows down in a thin film. As the flow rate regulating plate 11 is separated from the pipe plate 2 and the heat transmission pipes 3, the inflow to the respective heat transmission is equalized regardless of the warpage error of the pipe plate 2 and the finishing tolerance of the top of the heat transmission pipes 3.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、流下薄膜蒸発器の改良に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in falling film evaporators.

〔従来の技術〕[Conventional technology]

省エネ排熱利用機器である蒸気再生設備は、一般に軟水
循環式シェルアンドチューブ方式が多用されているが、
伝熱管内を満水で流すため、熱交換−%iの割には循環
流量が大きくなり、ポンプや配管り9−が大型化し高価
なものとなっている。
Steam regeneration equipment, which is an energy-saving waste heat utilization device, generally uses a shell-and-tube system with soft water circulation.
Since the inside of the heat transfer tube is filled with water, the circulation flow rate becomes large in relation to the heat exchange %i, and the pump and piping 9- become large and expensive.

七ノ解決案の1つとして、コストダウンのため、第2図
に示すような伝熱管内を薄い水膜とし℃流下させる方式
のものが開発された。
As one of the seven solutions, a method was developed in which a thin film of water was formed inside the heat transfer tube and flowed down by degrees Celsius, as shown in Figure 2, in order to reduce costs.

第2図において、(a)は装置全体の概略図、(b」は
伝熱管上部斜視図、(C)は同縦断面図である。
In FIG. 2, (a) is a schematic diagram of the entire apparatus, (b) is a perspective view of the upper part of the heat exchanger tube, and (C) is a longitudinal cross-sectional view of the same.

また、図中の各符号は、次の通りである。Further, each symbol in the figure is as follows.

21:蒸発器シェル、22:管板、23:伝熱管、24
;邪摩板、25;二次側配管、26:ポンプ、27:熱
水、2B=蒸気配管、29:タービン、30:多孔板 伝熱管内に均一な水膜を形成するためには、各管への流
量分配が一様なことと、分配された:黴が管内で一様な
水膜乞形成することの2点が満足されなければならない
21: Evaporator shell, 22: Tube plate, 23: Heat exchanger tube, 24
;Japanese plate, 25; Secondary piping, 26: Pump, 27: Hot water, 2B = Steam piping, 29: Turbine, 30: Perforated plate In order to form a uniform water film inside the heat transfer tube, each Two points must be satisfied: uniform flow distribution to the pipes and distribution: the mold forms a uniform water film within the pipes.

しかしながら、問題点とし℃、工作上伝熱管を取付ける
管板面が6瓢程度のひずみ誤差7持つ場合があり、又据
付上からも、本体の鉛直精度の関係から管板のレベル誤
差を生じ、第2図に示す伝熱管上端にVノンテを設けた
方式では、管上端面のレベル差のため各伝熱管への流量
分配がバラツキ、一様な水膜が形成されない場合があっ
た。
However, the problem is that the tube plate surface on which the heat exchanger tubes are attached may have a distortion error of about 6 ounces due to the workmanship, and the level error of the tube plate may occur due to the vertical accuracy of the main body during installation. In the method shown in FIG. 2 in which a V-shaped tube is provided at the upper end of the heat exchanger tube, the flow rate distribution to each heat exchanger tube varies due to the difference in the level of the upper end surface of the tube, and a uniform water film may not be formed.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明の目的は、流下薄膜蒸発器のコストダウンと性能
向上のため、各伝熱管に均等に流量を分配し、−4)k
な水膜を作る手法の確立にある。
The purpose of the present invention is to distribute the flow rate evenly to each heat transfer tube in order to reduce the cost and improve the performance of the falling film evaporator.
The goal is to establish a method to create a water film.

〔問題点を解決するための手段〕[Means for solving problems]

本先明は、熱水Yfパ熱管内を薄い水膜としてυIL下
させる流下薄膜蒸発器において、蒸発器外周を構成する
ンエル上部に、看板及び伝熱管とは分離した流量調節板
を設け、該流量調節板下面には伝熱管の数量と同じ細孔
が各伝熱管内壁に向かって設けられていることを特徴と
する流下薄膜蒸発器に関する。
The present invention has proposed a falling thin film evaporator in which the inside of the hot water Yf heat transfer tube is caused to fall as a thin water film υIL. The present invention relates to a falling thin film evaporator characterized in that the same number of pores as the number of heat transfer tubes are provided on the lower surface of the flow rate adjusting plate toward the inner wall of each heat transfer tube.

すなわち、本発明装置は、伝熱管上部に適正な流量?伝
熱管内壁へ衝突させるような穴を持つ流量調節&を設け
、各伝熱管への流量の均−化及び一様な水膜乞形成する
ことを特徴とする。
In other words, does the device of the present invention provide an appropriate flow rate to the upper part of the heat transfer tube? The heat exchanger is characterized by providing a flow rate regulator with holes that collide with the inner walls of the heat exchanger tubes, thereby equalizing the flow rate to each heat exchanger tube and forming a uniform water film.

〔作用〕[Effect]

以下に、本発明を第1図に基づき説明する。 The present invention will be explained below based on FIG.

第1図において、(a)は装置全体の概略図、(b)は
伝熱管上部斜視図、(C)は同縦断面図である。また、
図中の各符号は、次の通りである。
In FIG. 1, (a) is a schematic diagram of the entire apparatus, (b) is a perspective view of the upper part of the heat exchanger tube, and (C) is a longitudinal cross-sectional view of the same. Also,
Each code in the figure is as follows.

1:蒸発器シェル、2=管板、3:伝熱管、4:邪摩板
、5:二次側配管、6:ポンプ、7:熱水、8:蒸気配
管、9:タービン、10:衝突板、11:流量調節板、
11a:細孔 蒸発器シェル1は、本装置の外周を構成し、熱水7は、
最下部より二次側配管5、ポンプ6を経て蒸発器7工ル
1上部の衝突板10で動圧苓二低減されて、流量調節板
11内に流入する。
1: Evaporator shell, 2 = tube sheet, 3: heat transfer tube, 4: jam plate, 5: secondary piping, 6: pump, 7: hot water, 8: steam piping, 9: turbine, 10: collision Plate, 11: flow rate adjustment plate,
11a: The pore evaporator shell 1 constitutes the outer periphery of the device, and the hot water 7 is
From the lowest part, the fluid passes through the secondary pipe 5 and the pump 6, is reduced in dynamic pressure by the collision plate 10 above the evaporator 7, and flows into the flow rate adjustment plate 11.

流量調節板11の下面には、伝熱管3と同等の数の細孔
11aが伝熱管6の壁面に衝突する角度であき、側面は
蒸発器シェル1上部まで側板が設げられている。この流
量調節板11内に於い℃は、下部細孔11aからの熱水
7の流水抵抗分の水位が保たれる。細孔11aから流水
した熱水は、管板2と邪摩板4に支えられた伝熱管3の
壁面に衝突し、薄膜を形成し、流下する。
The lower surface of the flow control plate 11 has the same number of pores 11a as the heat exchanger tubes 3 at an angle that collides with the wall surface of the heat exchanger tubes 6, and a side plate is provided on the side surface up to the top of the evaporator shell 1. The temperature within this flow rate regulating plate 11 is maintained at a water level corresponding to the flow resistance of the hot water 7 from the lower pore 11a. The hot water flowing from the pores 11a collides with the wall surface of the heat exchanger tube 3 supported by the tube plate 2 and the jam plate 4, forms a thin film, and flows down.

テ・も水7の一部は蒸発し、蒸気配管8を経てタービン
9に至る。
A portion of the water 7 evaporates and reaches the turbine 9 via the steam pipe 8.

〔発明の効果〕〔Effect of the invention〕

(1)蒸発器シェル1上部に設けられた流量調節板11
は、管板2及び伝熱管3とは分離しているために、管板
2のひずみ誤差及び伝熱管3の上端の仕上梢反寺は関係
なく、各伝熱管3への流入量が均一化される。
(1) Flow rate adjustment plate 11 provided on the top of the evaporator shell 1
Since the tube sheet 2 and the heat exchanger tubes 3 are separated, the amount of inflow to each heat exchanger tube 3 is made uniform regardless of the distortion error of the tube sheet 2 and the finish of the top end of the heat exchanger tubes 3. be done.

(2)管板2及び伝熱管3の上端の仕上精度を高める必
要がなく、又、据付上の鉛直精度についても、前記(1
)と同tηであり、コストダウンとなる。
(2) There is no need to improve the finishing accuracy of the upper ends of the tube sheet 2 and heat exchanger tubes 3, and the vertical accuracy of the installation is also improved.
) is the same as tη, resulting in cost reduction.

(3)伝熱管6への熱水の流入量は、細孔11aの犬ぎ
さと充分な水位で決定されるため、管板2のひずみ、伝
熱管6の上端部の仕上に関係なく、均一化され、又、据
付上の鉛直精度についても通常の据付留置でよい。
(3) The amount of hot water flowing into the heat exchanger tubes 6 is determined by the size of the pores 11a and the sufficient water level, so it is uniform regardless of the distortion of the tube sheet 2 or the finish of the upper end of the heat exchanger tubes 6. The vertical accuracy of the installation can be maintained using normal installation methods.

4、 l、J面の1.・11単ノ工説明第1図は、本発
明の流F薄膜蒸兄器のイ11要乞示し、・π2図は、従
来のものの概要を示す。それぞれの図において、(a)
は装置全体の概略図、(ロ)は伝熱管上部斜視図、(C
)は同縦断面図である。
4, L, J side 1.・11 Description of the single process Figure 1 shows the flow F thin film evaporator of the present invention. ・Pi2 diagram shows the outline of the conventional one. In each figure, (a)
is a schematic diagram of the entire device, (b) is a perspective view of the upper part of the heat exchanger tube, (c
) is a longitudinal sectional view of the same.

復代理人  内 1)  明 復代理人  萩 原 亮 − (C) 第2図Sub-agent: 1) Akira Sub-agent Ryo Hagi Hara - (C) Figure 2

Claims (1)

【特許請求の範囲】[Claims] 熱水を伝熱管内を薄い水膜として流下させる流下薄膜蒸
発器において、蒸発器外周を構成するシェル上部に、管
板及び伝熱管とは分離した流量調節板を設け、該流量調
節板下面には伝熱管の数量と同じ細孔が各伝熱管内壁に
向かつて設けられていることを特徴とする流下薄膜蒸発
器。
In a falling thin film evaporator that allows hot water to flow down as a thin water film inside a heat transfer tube, a flow rate adjustment plate separate from the tube plate and the heat transfer tube is provided on the upper part of the shell constituting the outer periphery of the evaporator, and a flow rate adjustment plate is provided on the bottom surface of the flow rate adjustment plate. is a falling thin film evaporator characterized in that the same number of pores as the number of heat transfer tubes are provided on the inner wall of each heat transfer tube.
JP21436284A 1984-10-15 1984-10-15 Downflow thin film vaporizer Pending JPS6193389A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21436284A JPS6193389A (en) 1984-10-15 1984-10-15 Downflow thin film vaporizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21436284A JPS6193389A (en) 1984-10-15 1984-10-15 Downflow thin film vaporizer

Publications (1)

Publication Number Publication Date
JPS6193389A true JPS6193389A (en) 1986-05-12

Family

ID=16654527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21436284A Pending JPS6193389A (en) 1984-10-15 1984-10-15 Downflow thin film vaporizer

Country Status (1)

Country Link
JP (1) JPS6193389A (en)

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