CN1022643C - Vertical calandria heat exchanger operated in condensed steam-water drip mode - Google Patents

Vertical calandria heat exchanger operated in condensed steam-water drip mode Download PDF

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Publication number
CN1022643C
CN1022643C CN 91100529 CN91100529A CN1022643C CN 1022643 C CN1022643 C CN 1022643C CN 91100529 CN91100529 CN 91100529 CN 91100529 A CN91100529 A CN 91100529A CN 1022643 C CN1022643 C CN 1022643C
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CN
China
Prior art keywords
heat exchanger
tube
water
present
water vapor
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Expired - Fee Related
Application number
CN 91100529
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Chinese (zh)
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CN1063548A (en
Inventor
赵起
汪国强
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DALIAN POWER PLANT
Dalian University of Technology
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DALIAN POWER PLANT
Dalian University of Technology
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Priority to CN 91100529 priority Critical patent/CN1022643C/en
Publication of CN1063548A publication Critical patent/CN1063548A/en
Application granted granted Critical
Publication of CN1022643C publication Critical patent/CN1022643C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The present invention relates to a vertical type dropwise condensed steam-water tube array heat exchanger for condensing water vapor or water vapor containing a trace amount of ammonia. The structure of the heat exchanger of the present invention is basically the same with that of the existing vertical type tube array type heat exchanger, and the heat exchanger of the present invention is characterized in that a heat exchanging tube is a brazed copper tube provided with 5000 to 10000A of Cu-Cr-C2 H6 alloy layer at the outer wall, and a transversal liquid blocking plate installed to be perpendicular to a tube bundle is arranged in the heat exchanger. The heat exchanger of the present invention has the advantages of high heat conductivity, low thermal resistance, no pollution and no corrosion. The permanent stable dropwise condensation of the water vapor and the water vapor containing a trace amount of ammonia is realized so that the heat exchanging efficiency is improved one time.

Description

Vertical calandria heat exchanger operated in condensed steam-water drip mode
The present invention relates to a kind of water vapour or other stram condenser.
Heat exchanger tube in existing vapour-water row tube formula heat exchanger, the material that it adopted has many kinds such as carbon steel pipe, copper pipe and stainless steel tube etc.Water vapour all carries out heat exchange in the film condensation mode on the heat exchanger tube of these materials, its heat conduction efficiency is lower, for realizing efficient heat conducting dropwise condensation, there is data to be presented in heat exchange surface and applies organic accelerator (J.P58171466) or some inorganic matter [Erb.R.A﹠amp; Thelen, E.Dropwise Condensation Characteristics of permanent hydrophobic systems, U.S.Department of Interior, Office of Saline Water, R﹠amp; D R eport, NO, 184(1966)], it not only pollutes the condensate liquid erode metallic surfaces but also lack service life; Also have data to be presented in heat exchange surface plating thin polymer film (J.P.58133875), its additional thermal resistance is too big; Even also have data to be presented in metal [Finnicum, S.S.﹠amp such as heat exchange surface plating gold, silver, chromium; Westwater, J.W, Int.J.Heat Mass Transfer, Vol.32 NO8, PP.1541-1549(1989)], electroplate precious metal such as gold, silver and cost an arm and a leg and be difficult to realize industrialization, to keep the water vapour dropwise condensation time on electroplated chrome surface shorter though chromium is not noble metal, is generally hundreds of hour; Also there is the data introduction to do dropwise condensation surface (U.S-2248909) with tantalum, chromium and alloy thereof, not only manufacturing cost height but also heat conductivility are poor for they, particularly in industrial production in order to prevent water supply system, the corrosion of condensate system, in producing the boiler of steam, be added with the micro-ammonia that concentration is about 0.7~1.0mg/l, the water vapour that contains micro-ammonia electroplate or the metal surface of ion chromium plating on and on tantalum, zirconium metal surface, all can not realize dropwise condensation.
In view of above-mentioned weak point of the prior art the object of the present invention is to provide a kind of tubular heat exchanger that can realize permanent dropwise condensation to water vapour and the water vapour that contains micro-ammonia vapour.
Purpose of the present invention can realize by following measure: a kind of with water vapour or contain the vertical dropwise condensation vapour-water row tube heat exchanger of the water vapour condensation of micro-ammonia, it is respectively to have the upper perforated plate between the distributor chamber of cooling water outlet and inlet to be provided with heat-exchanging tube bundle between the two at the lower perforated plate between housing lower end that is provided with steam inlet tube, exhaust tube and drip pipe and end socket and upper end and the two halves that are divided into by dividing plate.It is characterized in that: heat exchanger tube is that outer wall is provided with 5000~10000 Cu-Cr-C 2H 6The brass tube of alloy-layer.In heat exchanger, be provided with tube bank and be vertically arranged cross liquid blocking plate.
Its structure of heat exchanger of the present invention is basic identical with existing tubular heat exchanger, and different is that heat exchanger tube adopts the brass material, and establishes the Cu-Cr-C with dropwise condensation effect on its outer wall 2H 6Alloy-layer.It is to adopt the magnetic controlled sputtering ion plating technology to form.The thickness of this alloy-layer generally can meet the demands at 5000~10000A.The thickness of above-mentioned alloy-layer and its interior various components contents depend on the preparation method.
The preparation method of this alloy-layer is to be that 10 brass tube places in the magnetic controlled sputtering ion plating stove with pretreated surface smoothness, and vacuum is 4-8 * 10 in stove -5Charging into argon gas under the mmHg, to make its dividing potential drop be 6-8 * 10 -3MmHg is 1500~2000V at the copper pipe workpiece voltage again, carries out argon ion sputtering under electric current 0.1~0.3A condition and cleans 5-10 minute.At partial pressure of ar gas 1~1.5 * 10 2MmHg, the ethane gas dividing potential drop is 1~1.5 * 10 -2Plated film 30-40 second under mmHg, copper pipe voltage 1500~2000V electric current 0.1~0.3A, the chromium target voltage 500~600V electric current 10-15A condition., be 2~3 * 10 at partial pressure of ar gas (or stagnation pressure) then -2MmHg, copper pipe voltage 1500-2000V, electric current 0.1-0.3A sputter 10-15 minute, thus finish Cu-Cr-C 2H 6The preparation of alloy-layer.
Heat exchanger of the present invention is to adopt vertical structure.Form moisture film for the drop gravitate that prevents condensed steam flows downward, then in heat exchanger, be provided with tube bank and be vertically arranged cross liquid blocking plate, on tube wall, generate liquid film to stop.The quantity of this liquid blocking plate determines that according to the length of tube bank it is a principle not form moisture film.
Heat exchanger of the present invention can make water vapour or content ammonia vapor realize permanent stable dropwise condensation, and its thermal conductivity is good, thermal resistance is little, do not have pollution and corrosion, improves one times of heat exchange efficiency.Thereby make heat exchanger volume reduce half with same live load, and save raw material, reduce floor space, now used 2 years, still be in good running status.
Drawing is described as follows:
Fig. 1 is a cross-sectional schematic of the present invention.
The invention will be further described to utilize the example shown in the accompanying drawing, in the cross-sectional schematic of vertical dropwise condensation vapour-water row tube heat exchanger shown in Figure 1, position at cylindrical shell 1 upper expansion joint is provided with steam inlet tube 2, is fixed with in the housing relative with this inlet and makes the homodisperse baffle plate 3 of inlet steam.Can another air inlet pipe sealing is standby during according to the one-sided admission of production needs.On housing, be provided with two in order to the adapter 4,5 of side amount vapor (steam) temperature be used to measure the adapter 6 of steam pressure and standby steam outlet pipe 7 in the steam inlet tube bottom.Be provided with on the housing of above-mentioned adapter bottom and discharge the not exhaust tube 8 of noncondensing gas, the one end is positioned on the housing other end and vertically passes the tube bank gap and be overhung at the interchanger body.On the housing of its underpart, also be provided with the conventional delivery pipe 9 of condensed water.Be in the relative side of same horizontal level with it and be provided with low discharge discharging tube 10, for the usefulness of the temperature of measuring condensate liquid.Be fixed with tube sheet at these housing two ends, its upper perforated plate 11 tightens together by bolt and distributor chamber 12, and vertical clapboard in the distributor chamber 13 is divided into two halves with it, and every half point is joined import and export pipe 14 and the bleeder pipe 15 that all is provided with a cooling water on the locular wall.Its lower perforated plate 16 tightens together by bolt and end socket 17.The bottom of this end socket is provided with the cooling-water drain pipe 18 that the cooling water that remains in the pipe can be drained.Be preferably in lower perforated plate be provided with housing in the radial direction through hole that is connected, it can be used for condensate liquid remaining in the emptying shell, the time spent can not be provided with tube bank between above-mentioned corresponding two tube sheets with cock 19 sealings.This tube bank is to be provided with 5000~10000 by regularly arranged outer wall Cu-Cr-C 2H 6The brass heat exchange tube 20 of alloy-layer is formed.On upper perforated plate, also be fixed with in addition and prevent to restrain diastrophic pull bar 21.In heat exchanger, be provided with and restrain vertically arranged cross liquid blocking plate 22, it is preferably circle and lacks shape, circle breach alternatively up and down is arranged, it can not only stop the generation of liquid film, but also has the function that conventional lip ring and split flow plate are possessed, promptly make fluid cross outside the mobile raising of the tube bank heat-transfer effect, also have the tube bank supported to prevent to restrain the effect of bending.

Claims (2)

1, a kind of vertical dropwise condensation vapour-water row tube heat exchanger that is used for water vapour or contains the water vapour condensation of micro-ammonia, it is in lower perforated plate (16) between housing (1) lower end that is provided with steam inlet tube (2), exhaust tube (8) and drip pipe (9) and end socket (17) and upper end and is respectively had the upper perforated plate (11) between the distributor chamber (12) of cooling water outlet and inlet (14) to be provided with heat-exchanging tube bundle between the two by the two halves that dividing plate (13) is divided into that it is characterized in that: heat exchanger tube (20) is provided with 5000~10000 for outer wall Cu-Cr-C 2H 6The brass tube of alloy-layer.
2, vertical dropwise condensation vapour according to claim 1-water row tube heat exchanger is characterized in that: be provided with and restrain vertically arranged horizontal liquid blocking plate (22) in heat exchanger.
CN 91100529 1991-01-26 1991-01-26 Vertical calandria heat exchanger operated in condensed steam-water drip mode Expired - Fee Related CN1022643C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91100529 CN1022643C (en) 1991-01-26 1991-01-26 Vertical calandria heat exchanger operated in condensed steam-water drip mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91100529 CN1022643C (en) 1991-01-26 1991-01-26 Vertical calandria heat exchanger operated in condensed steam-water drip mode

Publications (2)

Publication Number Publication Date
CN1063548A CN1063548A (en) 1992-08-12
CN1022643C true CN1022643C (en) 1993-11-03

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CN 91100529 Expired - Fee Related CN1022643C (en) 1991-01-26 1991-01-26 Vertical calandria heat exchanger operated in condensed steam-water drip mode

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101228105B (en) * 2005-06-28 2012-05-30 乌德有限公司 Method and device for using reaction heat during the production of 1,2-dichlorethane

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CN102309868B (en) * 2010-07-07 2015-02-11 杰智环境科技股份有限公司 Organic solvent condensate recycling device
CN102183008B (en) * 2011-04-25 2013-01-02 山西晋城无烟煤矿业集团有限责任公司 Coal economizer with high efficiency, corrosion resistance and hot dust erosion prevention
CN102269539B (en) * 2011-09-16 2012-12-12 上海理工大学 Control method and device for dropwise condensation heat-transferring property of super-hydrophobic surface
CN102692146A (en) * 2012-05-23 2012-09-26 张家港市科华化工装备制造有限公司 Heat exchanger
CN103712471A (en) * 2012-09-28 2014-04-09 北京中天金谷粮油工程技术有限公司 Efficient tubular two-pass condenser
CN103251123B (en) * 2013-05-24 2016-03-02 河南中烟工业有限责任公司 A kind of vacuum conditioner residual neat recovering system
CN106178810A (en) * 2016-09-23 2016-12-07 上海市凌桥环保设备厂有限公司 A kind of VOC gas concentration unit
JP6506865B1 (en) 2018-03-14 2019-04-24 栗田工業株式会社 Vapor condensation method
CN111976942B (en) * 2020-07-29 2022-03-08 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) Combined ship cooler
CN112339967B (en) * 2020-10-28 2022-04-19 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) Ship outboard cooling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101228105B (en) * 2005-06-28 2012-05-30 乌德有限公司 Method and device for using reaction heat during the production of 1,2-dichlorethane

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C15 Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993)
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C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee