CN112304119A - Compact flue gas hot water heat exchanger - Google Patents

Compact flue gas hot water heat exchanger Download PDF

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Publication number
CN112304119A
CN112304119A CN202011198122.8A CN202011198122A CN112304119A CN 112304119 A CN112304119 A CN 112304119A CN 202011198122 A CN202011198122 A CN 202011198122A CN 112304119 A CN112304119 A CN 112304119A
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China
Prior art keywords
heat exchange
shell
flue gas
tube
heat exchanger
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CN202011198122.8A
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Chinese (zh)
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CN112304119B (en
Inventor
盛中华
高峰
郑守东
曾凡宇
张之磊
崔健
祁春晓
宫景源
郑祎凡
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Liaoning Zhongwang Machinery Equipment Manufacturing Co Ltd
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Liaoning Zhongwang Machinery Equipment Manufacturing Co Ltd
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Priority to CN202011198122.8A priority Critical patent/CN112304119B/en
Publication of CN112304119A publication Critical patent/CN112304119A/en
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Publication of CN112304119B publication Critical patent/CN112304119B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • 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

The invention relates to a compact flue gas hot water heat exchanger, which belongs to the technical field of heat exchange, and comprises a shell and a heat exchange pipeline arranged on the shell, wherein one end of the shell is a flue gas inlet, the other end of the shell is a flue gas outlet, and the heat exchange pipeline comprises a shell side heat exchange pipe and a tube bundle heat exchange pipe which are sequentially arranged along the flow direction of a heat exchange fluid; the shell-side heat exchange tubes are arranged on the shell wall and are arranged along the axial direction of the shell wall; the tube bundle heat exchange tubes comprise a plurality of tube bundles arranged side by side, and the tube bundles are arranged along the axial direction of the shell; and a shell side flue gas pipe is also arranged on the shell wall of the shell along the axial direction of the shell. The invention not only improves the heat exchange efficiency, but also reduces the heat loss by arranging the multistage heat exchange tubes comprising the shell side heat exchange tubes and the tube bundle heat exchange tubes.

Description

Compact flue gas hot water heat exchanger
Technical Field
The invention belongs to the technical field of heat exchange, relates to a compact flue gas hot water heat exchanger, and particularly relates to a heat exchanger suitable for recovering flue gas waste heat of an industrial furnace.
Background
The heat exchanger is an energy-saving device for realizing heat transfer among fluids at different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature to enable the temperature of the fluid to reach the index specified by the process so as to meet the requirements of process conditions, and is also one of main devices for improving the energy utilization rate.
The flue gas hot water heat exchanger is used for absorbing and collecting energy in flue gas, and recycling recovered waste heat, so that emission can be reduced, and the utilization rate of energy is improved. The existing heat exchanger has low heat exchange efficiency, large volume, high manufacturing cost and difficult maintenance, and the heat exchange tube is easy to break in the using process, so that the use cost of the heat exchanger is increased.
Disclosure of Invention
In view of this, the present application aims to provide a compact flue gas hot water heat exchanger to improve heat exchange efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
a compact flue gas hot water heat exchanger comprises a shell and a heat exchange pipeline arranged on the shell, wherein one end of the shell is a flue gas inlet, the other end of the shell is a flue gas outlet, and the heat exchange pipeline comprises a shell side heat exchange pipe and a tube bundle heat exchange pipe which are sequentially arranged along the flow direction of a heat exchange fluid; the shell-side heat exchange tubes are arranged on the shell wall and are arranged along the axial direction of the shell wall; the tube bundle heat exchange tubes comprise a plurality of tube bundles arranged side by side, and the tube bundles are arranged along the axial direction of the shell.
Optionally, a shell-side flue gas pipe is further arranged on the shell wall of the shell along the axial direction of the shell.
Optionally, the flow direction of the flue gas in the shell side flue gas pipe is opposite to the water inlet direction of the heat exchanger.
Optionally, the shell-side heat exchange tubes are arranged in a circuitous manner and comprise a plurality of circumferential heat exchange tubes arranged along the circumferential direction of the shell, and adjacent circumferential heat exchange tubes are connected end to end.
Optionally, the shell-side heat exchange tubes comprise a lower shell-side heat exchange tube and an upper shell-side heat exchange tube arranged in sequence in the flow direction of the heat exchange fluid, the lower shell-side heat exchange tube and the upper shell-side heat exchange tube are arranged at the lower half part of the shell and the upper half part of the shell respectively, and the shell-side flue gas tube is located between the upper shell-side heat exchange tube and the lower shell-side heat exchange tube.
Optionally, the shell comprises an upper shell and a lower shell which are arranged oppositely, the upper shell side heat exchange tube and the lower shell side heat exchange tube are respectively arranged on the upper shell and the lower shell, and a water inlet of the upper shell side heat exchange tube and a water outlet of the lower shell side heat exchange tube are positioned at the same end of the shell and are communicated through an upper and a lower heat exchange shell water guide tube arranged between the water inlet and the water outlet.
Optionally, the tube bundle is arranged spirally and comprises a plurality of tube bundle units connected in series, each tube bundle unit comprises two vertical heat exchange tubes arranged in parallel and the end parts of the two vertical heat exchange tubes are flush, one end of each vertical heat exchange tube is provided with a first horizontal heat exchange tube communicated with the two vertical heat exchange tubes, and one side of the other end of each vertical heat exchange tube is provided with a second horizontal heat exchange tube communicated with the other end of each vertical heat exchange tube.
Optionally, the upper and lower sides of the casing are respectively provided with an upper avoidance hole and a lower avoidance hole corresponding to the vertical heat exchange tubes, and the upper and lower ends of the vertical section of the vertical heat exchange tubes extend out of the casing through the upper avoidance hole and the lower avoidance hole respectively, so that the first horizontal heat exchange tube and the second horizontal heat exchange tube are located outside the casing.
Optionally, the tube bundle is a light tube bundle, a fin tube bundle, or an internally threaded tube bundle.
Optionally, the angle of attack of the tube bundle is 30 °, 45 °, 60 ° or 90 °.
Optionally, the tube bundle is in a quadrilateral or triangular arrangement.
Optionally, the tube bundle is arranged in an equilateral quadrilateral or an equilateral triangle, wherein the apex angle of the equilateral quadrilateral is 90 ° or 60 °.
Optionally, the shell is cylindrical, and two ends of the shell are provided with annular flue gas pipeline flanges.
The invention has the beneficial effects that:
1. according to the invention, the fluid at the edge of the flue gas pipeline mainly participates in the heat exchange of the shell side part, the fluid at the middle part of the flue gas pipeline mainly participates in the heat exchange of the tube bundle, the spatial structure is reasonably arranged, and the multistage heat exchange tubes including the shell side heat exchange tubes and the tube bundle heat exchange tubes are arranged, so that the heat exchange efficiency is improved, and the heat loss is reduced.
2. According to the invention, the shell side flue gas pipe is arranged on the shell wall of the shell, so that the heat exchange efficiency is further improved.
3. The flow direction of the flue gas in the shell side flue gas pipe is opposite to the water inlet direction of the heat exchanger, so that the preheating of the heat exchange fluid is realized, the service life of the heat exchange pipe is prolonged, the heat loss of the shell side part is reduced, and the heat exchange efficiency and the heat utilization rate are further improved.
4. The tube bundle can be designed into various windward angles, and the tube bundle is flexible in arrangement.
5. According to the invention, the shell is designed into a split structure, and the shell side heat exchange tube is designed into a two-stage heat exchange structure comprising the lower shell side heat exchange tube and the upper shell side heat exchange tube which are sequentially arranged along the flow direction of the heat exchange fluid, so that the processing, manufacturing and maintenance of the heat exchanger are facilitated.
6. The heat exchanger has the advantages of compact structure, small volume, high heat exchange efficiency, simple installation and convenient maintenance; in addition, the flue gas and the water side are completely separated, so that the heat exchanger is more stable, safe and reliable in operation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic perspective view of a compact flue gas hot water heat exchanger;
FIG. 2 is a front view of a compact flue gas hot water heat exchanger;
FIG. 3 is a top view of a compact flue gas hot water heat exchanger;
FIG. 4 is a left side view of a compact flue gas hot water heat exchanger;
FIG. 5 is a schematic view of a tube bundle;
FIG. 6 is a schematic view of the direction of water flow within the tube bundle;
FIG. 7 is a schematic view of the arrangement of the tube bundles, wherein a is a windward angle of 90 degrees, b is a windward angle of 30 degrees, c is a windward angle of 45 degrees, and d is a windward angle of 60 degrees;
FIG. 8 is a schematic structural view of the lower housing;
FIG. 9 is a schematic view of the direction of water flow in the lower shell-side heat exchange tube;
FIG. 10 is a schematic diagram of heat exchange;
fig. 11 is a schematic diagram of the fluid flow pattern and fluid temperature change inside the heat exchanger.
Reference numerals: tube bank heat exchange tube 1, heat exchanger water inlet 2, heat exchanger delivery port 3, lower casing 4, upper housing 5, shell side flue gas pipe 6, water intake pipe 7, water pipe flange 8, flue gas pipeline flange 9, upper and lower heat transfer casing aqueduct 10, tube bank aqueduct 11, water drainage pipeline 12, flue gas flow direction mark 13, perpendicular heat exchange tube 1.1, second horizontal heat exchange tube 1.2, 90 elbow 1.3, first horizontal heat exchange tube 1.4, top shrouding 4.1, side shrouding 4.2, guide plate 4.3, interior shrouding 4.4, casing apron 4.5.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 11, a compact flue gas hot water heat exchanger includes a shell with two open ends and a heat exchange pipe disposed on the shell, one end of the shell is a flue gas inlet connected to a flue gas pipeline, the other end is a flue gas outlet, and two ends of the shell are provided with flue gas pipeline flanges; the heat exchange pipeline comprises a shell side heat exchange pipe and a tube bundle heat exchange pipe 1 which are sequentially arranged along the flow direction of a heat exchange fluid; the shell-side heat exchange tubes are arranged on the shell wall and are arranged along the axial direction of the shell wall; the tube bundle heat exchange tube 1 comprises a plurality of tube bundles arranged side by side, and the tube bundles are arranged along the axial direction of the shell.
In the invention, the fluid at the edge of the flue gas pipeline mainly participates in the heat exchange of the shell side part, the fluid at the middle part of the flue gas pipeline mainly participates in the heat exchange of the tube bundle, and the spatial structure is reasonably arranged; according to the invention, the multistage heat exchange tubes including the shell-side heat exchange tubes and the tube bundle heat exchange tubes are arranged, so that the heat exchange efficiency is improved, and the heat exchange loss is reduced.
In order to further improve the heat exchange efficiency, the shell side flue gas pipe is arranged on the shell wall of the shell along the axial direction of the shell.
In order to preheat the working medium and prolong the service life of the heat exchange pipeline, the flow direction of the flue gas in the shell side flue gas pipe 6 is opposite to the water inlet direction of the heat exchanger.
The shell of the invention is preferably cylindrical, two ends of the shell are provided with annular flue gas pipeline flanges 9, and the shell is connected with a flue gas pipeline through the flue gas pipeline flanges 9.
The shell side heat exchange tubes are preferably arranged in a circuitous manner and comprise a plurality of circumferential heat exchange tubes arranged along the circumferential direction of the shell, and adjacent circumferential heat exchange tubes are connected end to end.
Preferably, the shell-side heat exchange tubes comprise lower and upper shell-side heat exchange tubes arranged in series in the flow direction of the heat exchange fluid; the lower shell side heat exchange tube and the upper shell side heat exchange tube are respectively arranged on the lower half part of the shell and the upper half part of the shell; the water inlet of the lower shell side heat exchange tube is a heat exchanger water inlet 2 and is positioned at one end of the shell; the water outlet of the lower shell side heat exchange tube is positioned at the other end of the shell and is communicated with the water inlet of the upper shell side heat exchange tube; the water outlet of the upper shell side heat exchange tube is positioned at one end of the shell, which is far away from the water inlet of the upper shell side heat exchange tube, and is communicated with the water inlet of the tube bundle heat exchange tube 1; the shell side flue gas pipe 6 is positioned between the upper shell side heat exchange pipe and the lower shell side heat exchange pipe, and the flow direction of flue gas in the shell side flue gas pipe 6 is opposite to the flow direction of heat exchange fluid in the lower shell side heat exchange pipe.
The shell of the invention is preferably of a split structure and comprises an upper shell 5 and a lower shell 4 which are arranged oppositely and in a semicircular shape, an upper shell side heat exchange tube and a lower shell side heat exchange tube are respectively arranged on the upper shell 5 and the lower shell 4, a water inlet of the upper shell side heat exchange tube and a water outlet of the lower shell side heat exchange tube are positioned at the same end of the shell and are communicated through an upper heat exchange shell water guide pipe 10 and a lower heat exchange shell water guide pipe 10 which are arranged between the water inlet and the water outlet, and a shell side flue gas pipe 6 is positioned at one side of the shell far away from the upper.
The tube bundle is preferably arranged spirally and consists of a plurality of tube bundle units connected in series, each tube bundle unit comprises two vertical heat exchange tubes 1.1 arranged in parallel and with flush end parts, one end of each vertical heat exchange tube 1.1 is provided with a first horizontal heat exchange tube 1.4 communicated with the two vertical heat exchange tubes 1.1, and one side of the other end of each vertical heat exchange tube is provided with a second horizontal heat exchange tube 1.2 communicated with the other end of each vertical heat exchange tube 1.1.
Preferably, the upper and lower sides of the casing are respectively provided with an upper avoidance hole and a lower avoidance hole corresponding to the vertical heat exchange tubes, and the upper and lower ends of the vertical section of the vertical heat exchange tube 1.1 extend out of the casing through the upper avoidance hole and the lower avoidance hole respectively, so that the first horizontal heat exchange tube 1.4 and the second horizontal heat exchange tube 1.2 are located at the outer side of the casing.
Preferably, the tube bundle is arranged in an equilateral quadrilateral or an equilateral triangle, wherein the apex angle of the equilateral quadrilateral is 90 ° or 60 °.
Examples
A flue gas hot water heat exchanger is provided with a three-stage heat exchange system and comprises a shell with two open ends and a heat exchange pipeline arranged on the shell, wherein the shell is cylindrical, one end of the shell is a flue gas inlet and is connected with a flue gas pipeline through a flue gas pipeline flange 9 arranged at the end part of the shell, and the other end of the shell is a flue gas outlet; the shell is of a split structure and comprises a lower shell 4 and an upper shell 5; the heat exchange pipeline comprises a shell side heat exchange pipe and a tube bundle heat exchange pipe 1 which are sequentially arranged along the flow direction of heat exchange fluid, and the shell side heat exchange pipe is arranged on the wall of the shell and is axially arranged along the shell; the tube bundle heat exchange tube 1 comprises a plurality of tube bundles arranged side by side, and the tube bundles are arranged along the axial direction of the shell.
The concrete structure is as follows:
as shown in fig. 1 to 4, the heat exchange pipe of the heat exchanger includes a tube bundle heat exchange portion 1 and a shell-side heat exchange, wherein the shell-side heat exchange pipe includes a lower shell-side heat exchange pipe and an upper shell-side heat exchange pipe, and the upper shell-side heat exchange pipe and the lower shell-side heat exchange pipe are respectively disposed on an upper shell 5 and a lower shell 4. The water inlet pipeline 7 is connected with the heat exchange part of the lower shell, and the upper shell side heat exchange pipe and the lower shell side heat exchange pipe are communicated through the upper heat exchange shell water guide pipe 10 and the lower heat exchange shell water guide pipe 10; the upper shell side heat exchange tube is communicated with the tube bundle heat exchange tube 1 through a tube bundle water guide tube 11; a drain line 12 is connected to the outlet ends of the tube bundle heat exchange tubes 1. The lower shell side heat exchange tube, the upper shell side heat exchange tube and the tube bundle heat exchange tube 1 form a three-stage heat exchange system of the heat exchanger together.
As shown in fig. 5, the tube bundle of the present invention is preferably arranged in a spiral shape, consisting of a plurality of tube bundle units connected in series; the tube bundle unit comprises two vertical heat exchange tubes 1.1 arranged in parallel and a first horizontal heat exchange tube 1.4 positioned at one end of each vertical heat exchange tube 1.1, the end parts of the two vertical heat exchange tubes 1.1 are flush, and two ends of each first horizontal heat exchange tube 1.4 are respectively communicated with the two vertical heat exchange tubes 1.1; one side of the other end of one of the vertical heat exchange tubes 1.1 is provided with a second horizontal heat exchange tube 1.2 communicated with the other end, and the second horizontal heat exchange tube 1.2 is vertical to the first horizontal heat exchange tube 1.4. The first horizontal heat exchange tube 1.4 can be a 180-degree elbow, and the second horizontal heat exchange tube 1.2 is communicated with the vertical heat exchange tube 1.1 through a 90-degree elbow 1.3. The flow direction inside the heat exchange tube bundle is shown in fig. 6. The arrangement of the tube bundle as shown in fig. 7 can be divided into: the wind angle is 90 degrees, the wind angle is 30 degrees, the wind angle is 45 degrees and the wind angle is 60 degrees, and the arrangement mode of 90 degrees is given by the structure of the example. In addition, in order to increase the heat exchange efficiency, the tube bundle may be fabricated as a light tube bundle, a fin tube bundle, an internally threaded tube bundle, or the like, and the structure given in this example is a light tube bundle.
As shown in fig. 8, the lower casing 4 and the upper casing 5 are both composed of a top end sealing plate 4.1, a side sealing plate 4.2, a flow guide plate 4.3, an inner sealing plate 4.4 and a casing cover plate 4.5, the flow direction of the water inside the lower casing 4 is shown in fig. 9, and the flow direction of the water inside the upper casing 5 is opposite to the flow direction.
The installation mode is as shown in fig. 1-4, the cold water inlet heat exchange pipeline is connected with the water inlet 2 of the heat exchanger through a water pipe flange 8; the hot water heat return exchange pipeline is connected with the water outlet 3 of the heat exchanger through a heat exchange pipeline flange 8. The shell side flue gas pipe 6 is connected with a flue gas pipeline of the heat exchanger through a flue gas pipeline flange 9, and the flue gas flow direction is required to be consistent with the flue gas flow direction mark 13 when the shell side flue gas pipe 6 is installed.
The water inlet valve and the water outlet valve in the embodiment are all automatic valves so as to realize automatic water inlet; and a pressure gauge is arranged on the flue gas pipeline and connected with the alarm system so as to realize the function of pressure abnormity alarm.
FIG. 10 shows the fluid flow pattern and the fluid temperature variation, T, inside the heat exchangere，inFlue gas inlet temperature, Te，outFlue gas outlet temperature, Tw，inCold water inlet temperature, Tw，out-hot water outlet temperature (tertiary heat exchange temperature), T'ωTemperature of primary heat exchange, Tw-secondary heat exchange temperature. FIG. 10 shows the cold water temperature Tw，inAfter primary heat exchange of the lower shell side heat exchange tube, the heat exchange tube is raised to T'wAfter secondary heat exchange through the upper shell side heat exchange tube, the temperature is T'wIncrease of T ″)ωFinally, after three-stage heat exchange of the tube bundle heat exchange tube, the temperature is changed from T ″)wIs raised to Tw，out. The temperature of the flue gas is changed by T after heat exchangee，inDown to Te，out。
FIG. 11 shows a heat exchange schematic diagram of a heat exchanger, wherein Te is a flue gas temperature line, and Tw is a water temperature line; wherein, the direction of the water changes once, which shows that the water undergoes first-stage heat exchange, and the direction of the temperature line of the water changes three times, which shows that the water undergoes third-stage heat exchange, namely, a lower shell side heat exchange tube (first stage), an upper shell side heat exchange tube (second stage) and a tube bundle heat exchange tube (third stage).
Compared with the prior art, the invention adopts a multi-stage heat exchange technology, and each stage of heat exchange system is connected in series, thereby realizing the maximum heat exchange efficiency in a limited heat exchange space. The shell side is provided with primary heat exchange, so that heat loss of the shell of the heat exchanger can be reduced, primary heating of cold water can be realized, the temperature of water entering the tube bundle is not too low, and the service life of the tube bundle is prolonged. In the distribution of the heat exchange space, the central main flow of the flue gas pipe 6 exchanges heat with the pipe bundle, the fluid close to the wall surface of the shell exchanges heat with the shell side heat exchange pipe, and the structure arrangement of the heat exchange space is reasonable and compact.
The invention adopts a multi-stage heat exchange technology, has high heat exchange efficiency and compact structure; the flow resistance of the flue gas is small, and the load of a draught fan is not increased; the flue gas is completely separated from the water side, so that the equipment is safe and reliable; the equipment has high automation degree and has the functions of automatic water inlet and abnormal pressure alarm; the efficiency and energy-saving benefits of large industrial kilns and medium and small coal-fired, oil-fired and gas-fired boilers can be obviously improved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a compact flue gas hot water heat exchanger, includes the casing and sets up the heat transfer pipeline on the casing, and the one end of casing is flue gas inlet, and the other end is exhanst gas outlet, its characterized in that: the heat exchange pipeline comprises a shell side heat exchange pipe and a tube bundle heat exchange pipe which are sequentially arranged along the flow direction of the heat exchange fluid; the shell-side heat exchange tubes are arranged on the shell wall and are arranged along the axial direction of the shell wall; the tube bundle heat exchange tubes comprise a plurality of tube bundles arranged side by side, and the tube bundles are arranged along the axial direction of the shell.
2. A compact flue gas hot water heat exchanger as claimed in claim 1, wherein: and a shell side flue gas pipe is also arranged on the shell wall of the shell along the axial direction of the shell.
3. A compact flue gas hot water heat exchanger according to claim 2, characterized in that: the flow direction of the flue gas in the shell side flue gas pipe is opposite to the water inlet direction of the heat exchanger.
4. A compact flue gas hot water heat exchanger as claimed in claim 1, wherein: the shell side heat exchange tubes are arranged in a circuitous mode and comprise a plurality of circumferential heat exchange tubes arranged along the circumferential direction of the shell, and the adjacent circumferential heat exchange tubes are connected end to end.
5. A compact flue gas hot water heat exchanger according to claim 2, characterized in that: the shell side heat exchange tubes comprise lower shell side heat exchange tubes and upper shell side heat exchange tubes which are sequentially arranged along the flow direction of heat exchange fluid, the lower shell side heat exchange tubes and the upper shell side heat exchange tubes are respectively arranged on the lower half part of the shell and the upper half part of the shell, and the shell side flue gas tubes are positioned between the upper shell side heat exchange tubes and the lower shell side heat exchange tubes.
6. The compact flue gas hot water heat exchanger of claim 5, wherein: the shell comprises an upper shell and a lower shell which are oppositely arranged, an upper shell side heat exchange tube and a lower shell side heat exchange tube are respectively arranged on the upper shell and the lower shell, a water inlet of the upper shell side heat exchange tube and a water outlet of the lower shell side heat exchange tube are positioned at the same end of the shell and are communicated through an upper heat exchange shell water guide tube and a lower heat exchange shell water guide tube which are arranged between the water inlet and the water outlet.
7. A compact flue gas hot water heat exchanger as claimed in claim 1, wherein: the tube bundle is arranged spirally and consists of a plurality of tube bundle units connected in series, each tube bundle unit comprises two vertical heat exchange tubes arranged in parallel and the end parts of the two vertical heat exchange tubes are flushed, one end of each vertical heat exchange tube is provided with a first horizontal heat exchange tube communicated with the two vertical heat exchange tubes, and one side of the other end of each vertical heat exchange tube is provided with a second horizontal heat exchange tube communicated with the other end of each vertical heat exchange tube.
8. The compact flue gas hot water heat exchanger of claim 7, wherein: the upper and lower both sides of casing correspond perpendicular heat exchange tube department and are equipped with respectively and dodge the hole down, and the upper and lower both ends of the perpendicular heat exchange tube of vertical section are through dodging the hole respectively and dodging the hole down and stretch out the casing to make first horizontal heat exchange tube and second horizontal heat exchange tube be located the outside of casing.
9. A compact flue gas hot water heat exchanger as claimed in claim 1, wherein: the tube bundle is a light tube bundle, a fin tube bundle or an internal thread tube bundle.
10. A compact flue gas hot water heat exchanger as claimed in claim 1, wherein: the windward angle of the tube bundle is 30 degrees, 45 degrees, 60 degrees or 90 degrees.
CN202011198122.8A 2020-10-30 2020-10-30 Compact flue gas hot water heat exchanger Active CN112304119B (en)

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CN202011198122.8A CN112304119B (en) 2020-10-30 2020-10-30 Compact flue gas hot water heat exchanger

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CN112304119B CN112304119B (en) 2022-05-20

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Citations (5)

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Publication number Priority date Publication date Assignee Title
CN204345689U (en) * 2014-11-20 2015-05-20 北京阿玛西换热设备制造有限公司 Shunting string sheet flue gas waste heat recoverer in efficient
CN204404855U (en) * 2014-11-26 2015-06-17 中国海洋石油总公司 The wrap-round tubular heat exchanger of vertical clapboard is set in a kind of cavity
CN107013899A (en) * 2017-05-31 2017-08-04 浙江特富锅炉有限公司 Condenser applied to steam boiler
CN110726314A (en) * 2019-11-08 2020-01-24 广州威茨热能技术有限公司 Spiral flat tube heat exchanger
CN111649485A (en) * 2020-06-23 2020-09-11 珠海格力电器股份有限公司 Condensation heat exchange structure and gas water heater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204345689U (en) * 2014-11-20 2015-05-20 北京阿玛西换热设备制造有限公司 Shunting string sheet flue gas waste heat recoverer in efficient
CN204404855U (en) * 2014-11-26 2015-06-17 中国海洋石油总公司 The wrap-round tubular heat exchanger of vertical clapboard is set in a kind of cavity
CN107013899A (en) * 2017-05-31 2017-08-04 浙江特富锅炉有限公司 Condenser applied to steam boiler
CN110726314A (en) * 2019-11-08 2020-01-24 广州威茨热能技术有限公司 Spiral flat tube heat exchanger
CN111649485A (en) * 2020-06-23 2020-09-11 珠海格力电器股份有限公司 Condensation heat exchange structure and gas water heater

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