CN111089509A - Combined heat exchanger - Google Patents

Combined heat exchanger Download PDF

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Publication number
CN111089509A
CN111089509A CN201911234658.8A CN201911234658A CN111089509A CN 111089509 A CN111089509 A CN 111089509A CN 201911234658 A CN201911234658 A CN 201911234658A CN 111089509 A CN111089509 A CN 111089509A
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CN
China
Prior art keywords
heat exchanger
heat
medium
enamel
combination
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
CN201911234658.8A
Other languages
Chinese (zh)
Inventor
王健
李传凯
吉庆
唐以林
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.)
Shanghai Qiyao Thermal Power Engineering Co ltd
Shanghai Marine Diesel Engine Research Institute
Original Assignee
Shanghai Qiyao Thermal Power Engineering Co ltd
Shanghai Marine Diesel Engine Research Institute
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 Shanghai Qiyao Thermal Power Engineering Co ltd, Shanghai Marine Diesel Engine Research Institute filed Critical Shanghai Qiyao Thermal Power Engineering Co ltd
Priority to CN201911234658.8A priority Critical patent/CN111089509A/en
Publication of CN111089509A publication Critical patent/CN111089509A/en
Pending legal-status Critical Current

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    • 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
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/04Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081Heat exchange elements made from metals or metal alloys
    • F28F21/082Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081Heat exchange elements made from metals or metal alloys
    • F28F21/082Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel

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

Abstract

The invention discloses a combined heat exchanger which comprises a first heat exchanger, a second heat exchanger and a third heat exchanger which are sequentially arranged. The third heat exchanger is an enamel plate heat exchanger, the contact surface of a heat exchange fin in the enamel plate heat exchanger and a heat medium is enamel, and the first heat exchanger, the second heat exchanger and the third heat exchanger are arranged along a straight line. According to the combined heat exchanger, the three heat exchangers are arranged along the flow direction of the heat medium, the enamel plate heat exchanger is adopted at the most downstream, heat exchange can be fully carried out at three temperature gradients, the heat exchange efficiency is improved, the problem that the common plate heat exchanger is poor in low-temperature corrosion resistance is solved, liquid is not prone to adhering to the enamel surface, the service life of the enamel plate heat exchanger is long, and the use cost is further reduced.

Description

Combined heat exchanger
Technical Field
The invention relates to the field of chemical industry, in particular to a combined heat exchanger.
Background
The plate heat exchanger is a high-efficiency heat exchanger with high heat exchange coefficient, small floor area, light weight and reduced resistance, is generally made of cast iron, carbon steel or stainless steel and the like, has the problems of poor low-temperature corrosion, no dew point corrosion resistance and the like, has the defect of short normal service cycle under the condition of low-temperature corrosion of a heat medium, needs to be frequently replaced, and has complex procedures and high cost.
Accordingly, there is a need to provide a combination heat exchanger to at least partially solve the problems of the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to at least partially solve the problems, the invention provides a combined heat exchanger which comprises a first heat exchanger, a second heat exchanger and a third heat exchanger which are sequentially arranged, wherein the third heat exchanger is an enamel plate heat exchanger, the contact surface between a heat exchange fin in the enamel plate heat exchanger and a heat medium is enamel, and the first heat exchanger, the second heat exchanger and the third heat exchanger are arranged along a straight line.
According to the combined heat exchanger, the three heat exchangers are arranged along the flow direction of the heat medium, the enamel plate heat exchanger is adopted at the most downstream, heat exchange can be fully carried out at three temperature gradients, the heat exchange efficiency is improved, the problem that the common plate heat exchanger is poor in low-temperature corrosion resistance is solved, liquid is not prone to adhering to the enamel surface, the service life of the enamel plate heat exchanger is long, and the use cost is further reduced.
Further, the working temperature of the first heat exchanger is more than 450 ℃, the working temperature of the second heat exchanger is between 200 ℃ and 450 ℃, and the working temperature of the third heat exchanger is less than 200 ℃.
Further, the first heat exchanger is directly connected to the second heat exchanger.
Further, a heat medium intermediate channel is arranged between the second heat exchanger and the third heat exchanger, the second heat exchanger is welded to the heat medium intermediate channel, and the third heat exchanger is connected with the heat medium intermediate channel through a flange.
Further, the combination heat exchanger further includes a first intermediate cooling medium passage connected between the second heat exchanger and the third heat exchanger.
Further, the combination type heat exchanger further comprises a second intermediate cooling medium passage connected between the first heat exchanger and the second heat exchanger.
Further, the first heat exchanger and the second heat exchanger are perpendicular to a cold medium inlet and a hot medium outlet of at least one of the third heat exchangers.
Further, the first heat exchanger is a stainless steel plate type heat exchanger, and heat exchange fins in the stainless steel plate type heat exchanger are made of stainless steel.
Further, the second heat exchanger is a carbon steel plate type heat exchanger, and heat exchange fins in the carbon steel plate type heat exchanger are made of carbon steel.
Further, the contact surface of the heat medium intermediate channel and the heat medium is enameled.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
fig. 1 is a schematic view of a combination heat exchanger according to the present invention.
Description of reference numerals:
10: first heat exchanger
20: second heat exchanger
30: third heat exchanger
41: intermediate channel for heat medium
42: flange
43: heat medium inlet channel
44: outlet channel for heat medium
51: refrigerant inlet channel
52: refrigerant outlet channel
53: first cold medium intermediate channel
54: second cold medium intermediate channel
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the following description, a detailed description will be given in order to thoroughly understand the present invention. It is apparent that the implementation of the embodiments of the invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.
Fig. 1 shows a combined heat exchanger according to a preferred embodiment of the present invention, which includes a first heat exchanger 10, a second heat exchanger 20, and a third heat exchanger 30, which are sequentially disposed. The third heat exchanger 30 is an enamel plate heat exchanger, contact surfaces of heat exchange fins in the enamel plate heat exchanger and a heat medium are enamel, and the first heat exchanger 10, the second heat exchanger 20 and the third heat exchanger 30 are arranged along a straight line.
According to the combined heat exchanger, the three heat exchangers are arranged along the flow direction of the heat medium, the enamel plate heat exchanger is adopted at the most downstream, heat exchange can be fully carried out at three temperature gradients, the heat exchange efficiency is improved, the problem that the common plate heat exchanger is poor in low-temperature corrosion resistance is solved, liquid is not prone to adhering to the enamel surface, the service life of the enamel plate heat exchanger is long, and the use cost is further reduced.
Specifically, the first heat exchanger 10, the second heat exchanger 20, and the third heat exchanger 30 are sequentially arranged in the flow direction of the heat medium. Wherein the temperature of the heat medium in the first heat exchanger 10 is the highest, the temperature of the heat medium in the second heat exchanger 20 is the second highest, and the temperature of the heat medium in the third heat exchanger 30 is the lowest.
Continuing to refer to fig. 1, the first heat exchanger 10 is preferably a stainless steel plate heat exchanger in which the fins are made of stainless steel. The working temperature of the first heat exchanger 10 is more than 450 ℃, that is, the temperature of the heat medium entering the first heat exchanger 10 is more than 450 ℃, the stainless steel has good high temperature corrosion resistance, and the high temperature section adopts a stainless steel plate type heat exchanger, so that the service life of the combined heat exchanger can be prolonged.
The second heat exchanger 20 is preferably a carbon steel plate heat exchanger in which the fins are made of carbon steel. The working temperature of the second heat exchanger 20 is between 200 ℃ and 450 ℃, that is, the temperature of the heat medium entering the second heat exchanger 20 is between 200 ℃ and 450 ℃, neither high temperature corrosion nor low temperature corrosion exists in the temperature range of 200 ℃ to 450 ℃, a carbon steel heat exchanger is adopted in the middle temperature region, the characteristic that carbon steel is easy to obtain and low in cost is fully utilized, and the cost of the combined heat exchanger can be greatly reduced.
The operating temperature of the third heat exchanger 30 is below 200 c, it being understood that the temperature of the thermal medium entering the third heat exchanger 30 is less than 200 c.
The first heat exchanger 10 is directly connected to the second heat exchanger 20. Preferably, the first heat exchanger 10 and the second heat exchanger 20 are connected by welding. A heat medium intermediate channel 41 is arranged between the second heat exchanger 20 and the third heat exchanger 30, the second heat exchanger 20 is welded to the heat medium intermediate channel 41, and the third heat exchanger 30 is connected with the heat medium intermediate channel 41 through a flange 42. Wherein the contact surface of the heat medium intermediate channel 41 and the heat medium is enameled.
With continued reference to fig. 1, the combination heat exchanger further includes a first intermediate coolant passage 53 and a second intermediate coolant passage 54. Wherein the first cold medium intermediate passage 53 is connected to the side of the same side of the second and third heat exchangers 20 and 30, and the second cold medium intermediate passage 54 is connected to the side of the other side of the first and second heat exchangers 10 and 20. Thus, the first heat exchanger 10 and the second heat exchanger 20 are perpendicular to the cooling medium inlet and the heating medium outlet of the third heat exchanger 30, and the cooling medium passes through the third heat exchanger 30, the second heat exchanger 20, and the first heat exchanger 10 in this order. In the illustrated embodiment, the heat medium inlet passage 43, the heat medium outlet passage 44, and the heat medium intermediate passage 41 are substantially in a straight line, and the first cold medium intermediate passage 53, the second cold medium intermediate passage 54, the heat medium intermediate passage 41, the heat medium inlet passage 43, the heat medium outlet passage 44, the cold medium inlet passage 51, and the cold medium outlet passage 52 are all located substantially on the same plane.
In order to further reduce the cost, the frames of the first heat exchanger 10, the second heat exchanger 20 and the third heat exchanger 30 are made of carbon steel.
In summary, the heat medium firstly enters the first heat exchanger 10 via the heat medium inlet channel 43, then enters the second heat exchanger 20, then enters the third heat exchanger 30 via the heat medium intermediate channel 41, and finally exits the combination heat exchanger via the heat medium outlet channel 44; the cold medium first enters the third heat exchanger 30 via the cold medium inlet channel 51, then enters the second heat exchanger 20 via the first cold medium intermediate channel 53, then enters the first heat exchanger 10 via the second cold medium intermediate channel 54, and finally exits the combination heat exchanger via the cold medium outlet channel 52. The cold and hot medium flows reversely, so that the hierarchy of heat exchange is increased, and the heat exchange efficiency is improved.
The third heat exchanger 30 is connected to the heat medium outlet channel 44, the coolant inlet channel 51 and the first coolant intermediate channel 53 by flanges 42. The connection surface of the flange 42 of the third heat exchanger 30 with the intermediate heat medium passage 41 and the outlet heat medium passage 44 is provided with a corrosion-resistant gasket.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The combined heat exchanger is characterized by comprising a first heat exchanger, a second heat exchanger and a third heat exchanger which are sequentially arranged, wherein the third heat exchanger is an enamel plate type heat exchanger, contact surfaces of heat exchange fins and a heat medium in the enamel plate type heat exchanger are enamel, and the first heat exchanger, the second heat exchanger and the third heat exchanger are arranged along a straight line.
2. The combination heat exchanger of claim 1, wherein the first heat exchanger has an operating temperature of 450 ℃ or greater, the second heat exchanger has an operating temperature of between 200 ℃ and 450 ℃, and the third heat exchanger has an operating temperature of less than 200 ℃.
3. The combination heat exchanger of claim 1, wherein the first heat exchanger is directly connected to the second heat exchanger.
4. The combination heat exchanger of claim 1, wherein a thermal medium intermediate channel is provided between the second heat exchanger and the third heat exchanger, the second heat exchanger is welded to the thermal medium intermediate channel, and the third heat exchanger is flanged to the thermal medium intermediate channel.
5. The combination heat exchanger of claim 1, further comprising a first intermediate cold medium passage connected between the second heat exchanger and the third heat exchanger.
6. The combination heat exchanger of claim 1, further comprising a second intermediate cold medium passage connected between the first heat exchanger and the second heat exchanger.
7. The combination heat exchanger of claim 1, wherein the first heat exchanger, the second heat exchanger are perpendicular to a cold medium inlet and a hot medium outlet of at least one of the third heat exchangers.
8. The combination heat exchanger of claim 1, wherein the first heat exchanger is a stainless steel plate heat exchanger, and the fins in the stainless steel plate heat exchanger are made of stainless steel.
9. The combination heat exchanger of claim 1, wherein the second heat exchanger is a carbon steel plate heat exchanger, and the fins in the carbon steel plate heat exchanger are made of carbon steel.
10. Combined heat exchanger according to claim 4, characterised in that the contact surfaces of the intermediate heat medium channels with the heat medium are enamelled.
CN201911234658.8A 2019-12-05 2019-12-05 Combined heat exchanger Pending CN111089509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911234658.8A CN111089509A (en) 2019-12-05 2019-12-05 Combined heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911234658.8A CN111089509A (en) 2019-12-05 2019-12-05 Combined heat exchanger

Publications (1)

Publication Number Publication Date
CN111089509A true CN111089509A (en) 2020-05-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911234658.8A Pending CN111089509A (en) 2019-12-05 2019-12-05 Combined heat exchanger

Country Status (1)

Country Link
CN (1) CN111089509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117190230A (en) * 2023-08-30 2023-12-08 上海雷林工业设备有限公司 Plate-type air preheater

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2202072C2 (en) * 2001-04-28 2003-04-10 ОАО "Инжиниринговая компания "ЗиОМАР" Multi-pass tubular air preheater
CN201363750Y (en) * 2009-02-06 2009-12-16 中国石油化工集团公司 Air preheater
CN201706527U (en) * 2010-07-02 2011-01-12 河南方圆工业炉设计制造有限公司 Combination air preheater
CN201903066U (en) * 2010-12-20 2011-07-20 洛阳瑞昌石油化工设备有限公司 Low temperature dew point corrosion resistance enamel plate type air preheater
US20140352931A1 (en) * 2013-05-31 2014-12-04 Steve Turner Corrosion Resistant Air Preheater with Lined Tubes
CN106979535A (en) * 2017-04-28 2017-07-25 北京拓首工业炉股份有限公司 A kind of combined air air preheater with denitration function
CN206739348U (en) * 2017-04-28 2017-12-12 北京拓首工业炉股份有限公司 A kind of combined air air preheater
CN109611883A (en) * 2019-01-18 2019-04-12 洛阳森德石化工程有限公司 A kind of anticorrosive drop dirt technique of plate type preheater metal and glass composite apparatus
CN211782963U (en) * 2019-12-05 2020-10-27 上海齐耀热能工程有限公司 Combined heat exchanger

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2202072C2 (en) * 2001-04-28 2003-04-10 ОАО "Инжиниринговая компания "ЗиОМАР" Multi-pass tubular air preheater
CN201363750Y (en) * 2009-02-06 2009-12-16 中国石油化工集团公司 Air preheater
CN201706527U (en) * 2010-07-02 2011-01-12 河南方圆工业炉设计制造有限公司 Combination air preheater
CN201903066U (en) * 2010-12-20 2011-07-20 洛阳瑞昌石油化工设备有限公司 Low temperature dew point corrosion resistance enamel plate type air preheater
US20140352931A1 (en) * 2013-05-31 2014-12-04 Steve Turner Corrosion Resistant Air Preheater with Lined Tubes
CN106979535A (en) * 2017-04-28 2017-07-25 北京拓首工业炉股份有限公司 A kind of combined air air preheater with denitration function
CN206739348U (en) * 2017-04-28 2017-12-12 北京拓首工业炉股份有限公司 A kind of combined air air preheater
CN109611883A (en) * 2019-01-18 2019-04-12 洛阳森德石化工程有限公司 A kind of anticorrosive drop dirt technique of plate type preheater metal and glass composite apparatus
CN211782963U (en) * 2019-12-05 2020-10-27 上海齐耀热能工程有限公司 Combined heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117190230A (en) * 2023-08-30 2023-12-08 上海雷林工业设备有限公司 Plate-type air preheater

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