CN112728968A - Heat-supplementing temperature-raising type descaling tubular heat exchanger - Google Patents

Heat-supplementing temperature-raising type descaling tubular heat exchanger Download PDF

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Publication number
CN112728968A
CN112728968A CN202011551365.5A CN202011551365A CN112728968A CN 112728968 A CN112728968 A CN 112728968A CN 202011551365 A CN202011551365 A CN 202011551365A CN 112728968 A CN112728968 A CN 112728968A
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CN
China
Prior art keywords
flue gas
heat exchange
box body
tube plate
heat exchanger
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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
CN202011551365.5A
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Chinese (zh)
Inventor
朱国富
钱荣忠
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.)
Nanjing Yire Vertical Environmental Protection Technology Liyang Co ltd
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Nanjing Yire Vertical Environmental Protection Technology Liyang Co ltd
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Application filed by Nanjing Yire Vertical Environmental Protection Technology Liyang Co ltd filed Critical Nanjing Yire Vertical Environmental Protection Technology Liyang Co ltd
Priority to CN202011551365.5A priority Critical patent/CN112728968A/en
Publication of CN112728968A publication Critical patent/CN112728968A/en
Pending legal-status Critical Current

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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
    • F28D7/06—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 having a single U-bend
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

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

Abstract

The invention discloses a concurrent heating type descaling tubular heat exchanger, which comprises a box body, wherein a flue gas inlet is arranged on the left side of the box body, a flue gas outlet is arranged on the right side of the box body, and the concurrent heating type descaling tubular heat exchanger is characterized in that: the opening part of the welding port of the box body is fixedly provided with a welding end tube plate, the welding end tube plate is fixedly connected with the refrigerant header seal head through a flange and a bolt, a plurality of groups of heat exchange tubes arranged at intervals are arranged in the box body, one end of each heat exchange tube is fixedly welded with the welding end tube plate, the other end of each heat exchange tube penetrates through the lower tube plate and extends out of the box body, and a U-shaped elbow is fixedly welded between the extending ends of every two heat exchange tubes in the extending ends of the plurality of groups. The invention mixes the flue gas with lower temperature with the high-temperature flue gas obtained by combustion, leads the high-temperature flue gas and the low-temperature flue gas to be uniformly mixed without bias flow under the action of the cyclone distributor and the throat pipe for forced mixing flow, and then heats the refrigerant, leads the outlet temperature of the refrigerant to reach the process use requirement and has stable temperature.

Description

Heat-supplementing temperature-raising type descaling tubular heat exchanger
Technical Field
The invention relates to the technical field of tubular heat exchangers, in particular to a heat-supplementing and temperature-raising type descaling tubular heat exchanger.
Background
On the basis of the continuous development of national economy, low-carbon economy is paid attention and paid attention to by all social circles, and energy conservation and emission reduction become important embodiments of the low-carbon economy.
In industrial production, the utilization rate of low-temperature flue gas is low, the low-temperature flue gas is directly utilized to heat a refrigerant, and the outlet temperature of the refrigerant cannot meet the process use requirement, so that the low-temperature flue gas is often directly discharged into a chimney, the low-temperature flue gas has large air volume and considerable heat, and like chicken ribs, the taste of food is remained; in industrial production, the general recycling of hot water, water contains the corruption, and impurity is many, recycles the back many times, and it is serious to inevitable lead to the interior scale deposit of heat exchange tube, and the heat exchange tube both ends of traditional tubular heat exchanger all weld U type return bend, in case take place the scale deposit in the heat exchange tube and block up, the clearance difficulty can only do and scrap the processing of changing new.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a concurrent heating type descaling tubular heat exchanger, which solves the problems that the utilization rate of low-temperature flue gas is low, the flue gas can only be discharged into a chimney frequently, and heat energy resources are wasted; and the problem of difficult cleaning once scaling and blockage occur in the heat exchange tube of the traditional tube type heat exchanger.
The technical scheme is as follows: the invention relates to a concurrent heating type descaling tubular heat exchanger, which comprises a box body, wherein the left side of the box body is provided with a flue gas inlet, and the right side of the box body is provided with a flue gas outlet, and the concurrent heating type descaling tubular heat exchanger is characterized in that: a welding end tube plate is fixedly installed at an opening of the welding port of the box body, the welding end tube plate is fixedly connected with the refrigerant header end socket through a flange and a bolt, a plurality of groups of heat exchange tubes arranged at intervals are arranged in the box body, one end of each heat exchange tube is fixedly welded with the welding end tube plate, the other end of each heat exchange tube penetrates through the lower tube plate and extends out of the box body, a U-shaped elbow is fixedly welded between the extending ends of every two heat exchange tubes in the extending ends of the plurality of groups of heat exchange tubes, so that two groups of heat exchange tubes and the U-shaped elbows form a U-shaped heat exchange channel, one end of the heat exchange channel is communicated with a refrigerant inlet of the refrigerant; the flue gas inlet of the box body is connected with the flue gas outlet of the hot blast stove through a connecting throat pipe, and the flue gas inlet of the hot blast stove is communicated with the burner interface.
Furthermore, the flue gas inlet of the hot-blast stove is of a wide-mouth structure, the flue gas outlet of the hot-blast stove is of a necking structure, and a filtering steel wire mesh is installed at the flue gas inlet of the hot-blast stove.
Furthermore, the heat exchange tube and the lower tube plate are not welded, and the diameter of a round hole in the lower tube plate for the heat exchange tube to pass through is larger than that of the heat exchange tube.
Furthermore, a cyclone distributor is fixedly installed at the flue gas outlet of the hot blast stove through a support.
Further, cyclone distributor includes the disk body, the week side of disk body is that annular array is provided with the multiunit guide plate, the guide plate is inclination 45 settings.
Further, a heat insulation layer is arranged on the inner side of the welding end tube plate, and a heat-resistant stainless steel plate is lined in the heat insulation layer.
Furthermore, the lower tube plate is fixedly connected with the box body, a seal box used for sealing a U-shaped elbow positioned on the outer side of the box body is fixedly installed on the lower tube plate, and a through hole used for communicating the inside of the seal box with the inside of the box body is formed in the lower tube plate.
Furthermore, the heat exchange tube is provided with fins.
Furthermore, the throat connecting pipe is an expansion corrugated cylinder, and the diameter of the throat connecting pipe is not more than 1/2 of the diameter of the hot blast stove.
Furthermore, an expansion joint is arranged at a flue gas outlet of the box body.
Has the advantages that: the invention mixes the flue gas with lower temperature with the high-temperature flue gas obtained by combustion, leads the high-temperature flue gas and the low-temperature flue gas to be uniformly mixed without bias flow under the action of the cyclone distributor and the throat pipe forced mixed flow, and then heats the refrigerant, leads the outlet temperature of the refrigerant to reach the process use requirement and the temperature to be stable; one end of the heat exchange tube is welded and fixed with the tube plate at the welding end, the welding bead is protected behind the heat insulation layer, the other end of the heat exchange tube is connected in series by a U-shaped elbow, and the diameter of a round hole for the heat exchange tube to pass through on the lower tube plate is larger than the diameter of the heat exchange tube, so that the heat exchange tube can expand, stretch and freely at high temperature; when the heat exchange pipes are scaled and blocked, the refrigerant header seal head can be detached, all the heat exchange pipes are visible, and the heat exchange pipes can be cleaned. The invention can fully excavate low-temperature flue gas energy, fully supplement heat and mix flue gas, has high heat exchange efficiency, low price, convenient maintenance, stable refrigerant supply, easy cleaning after scaling of the tubular heat exchanger, compact equipment and wide application range.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a cyclone distributor;
FIG. 3 is a schematic view of a lower tube plate structure.
Detailed Description
The invention is further described below with reference to the following figures and examples:
as shown in fig. 1 to 3, the concurrent heating type descaling tubular heat exchanger of the present invention comprises a box body 1, wherein a flue gas inlet 2 is arranged on the left side of the box body 1, a flue gas outlet 3 is arranged on the right side of the box body 1, an expansion joint 4 is arranged on the flue gas outlet 3 of the box body 1, and a welding port 19 is further arranged on the box body 1;
a welding end tube plate 20 is fixedly installed at an opening of a welding port 19 of the box body 1, the welding end tube plate 20 is fixedly connected with a refrigerant header seal head 8 through flanges and bolts, a rubber sealing gasket is arranged between the flanges, a plurality of groups of heat exchange tubes 5 arranged at intervals are arranged in the box body 1, fins 15 are arranged on the heat exchange tubes 5, the heat exchange efficiency can be increased by the fins 15, one end of each heat exchange tube 5 is fixedly welded with the welding end tube plate 20, a heat insulation layer 16 is arranged on the inner side of each welding end tube plate 20, the heat insulation layer 16 is made of aluminum silicate fibers or castable, a heat-resistant stainless steel plate is lined in the heat insulation layer 16, the other end of each heat exchange tube 5 penetrates through a lower tube plate 22 and extends out of the box body 1, the lower tube plate 22 is fixedly connected with the; one end of the heat exchange tube 5 is welded and fixed with the tube plate 20 at the welding end, the welding bead is protected behind the heat insulation layer 16, the heat insulation layer 16 can prevent the temperature of the refrigerant header seal head 8 from influencing the smoke temperature in the box body 1, the other end of the heat exchange tube 5 is connected in series by the U-shaped elbow 6, the diameter of a round hole for the heat exchange tube 5 to pass through on the lower tube plate 22 is larger than the diameter of the heat exchange tube 5, so that the heat exchange tube 5 can expand, stretch and freely at high temperature, the lower tube plate 22 only plays a supporting role for the heat exchange tube 5, and the;
a U-shaped elbow 6 is fixedly welded between the extension ends of every two of the extension ends of the heat exchange tubes 5, so that the two groups of heat exchange tubes 5 and the U-shaped elbow 6 form a U-shaped heat exchange channel 7, and the U-shaped heat exchange channel 7 can maximize the heat exchange efficiency; one end of the heat exchange channel 7 is communicated with a refrigerant inlet 81 of the refrigerant header seal head 8, and the other end of the heat exchange channel 7 is communicated with a refrigerant outlet 82 of the refrigerant header seal head 8; when the heat exchange tubes 5 are scaled and blocked, the refrigerant header seal head 8 can be detached, and all the heat exchange tubes 5 can be seen, so that the heat exchange tubes 5 can be cleaned;
the flue gas inlet 2 of the box body 1 is connected with the flue gas outlet 11 of the hot blast stove 10 through a throat connecting pipe 9, the throat connecting pipe 9 is an expansion corrugated cylinder, and the diameter of the throat connecting pipe 9 is not more than 1/2 of the diameter of the hot blast stove 10; a flue gas inlet 12 of the hot blast stove 10 is communicated with a burner interface 13; the burner interface 13 is externally connected with a burner and can provide high-temperature flue gas;
a flue gas inlet 12 of the hot blast stove 10 is of a wide-mouth structure, a flue gas outlet 11 of the hot blast stove 10 is of a reducing structure, and a filtering steel wire mesh 14 is arranged at the flue gas inlet 12 of the hot blast stove 10;
a cyclone distributor 17 is fixedly installed at a flue gas outlet 11 of the hot blast stove 10 through a support, the cyclone distributor 17 comprises a disk body 171, a plurality of groups of guide plates 172 are arranged on the peripheral side of the disk body 171 in an annular array, the guide plates 172 are arranged at an inclination angle of 45 degrees, and the guide plates 172 can uniformly mix high-temperature flue gas and low-temperature flue gas without bias flow; mixing the flue gas with lower temperature with the high-temperature flue gas obtained by the combustor, uniformly mixing the high-temperature flue gas and the low-temperature flue gas without bias flow under the action of forced mixed flow of the cyclone distributor 17 and the throat pipe 9, and then heating the refrigerant to ensure that the outlet temperature of the refrigerant meets the process use requirement and is stable in temperature;
the lower tube plate 22 is fixedly provided with the seal box 18 for sealing the U-shaped elbow 6 positioned on the outer side of the box body 1, the lower tube plate 22 is provided with the through hole 21 for communicating the inside of the seal box 18 with the inside of the box body 1, so that the inside of the seal box 18 is communicated with the inside of the box body 1.
The working principle is as follows: when the device is used, the burner interface 13 is externally connected with a burner, natural gas or fuel oil is mixed with air and then introduced into the hot blast stove 10 to be fully combusted to obtain high-temperature flue gas, the flue gas with lower temperature enters from a flue gas inlet 12 of the hot blast stove 10, the high-temperature flue gas and low-temperature flue gas generated by combustion are mixed in the hot blast stove 10, the high-temperature flue gas and the low-temperature flue gas are uniformly mixed and enter a flue gas inlet 2 on the left side of the box body 1 under the forced mixed flow action of the cyclone distributor 17 and the throat pipe 9, a refrigerant to be heated is introduced into the heat exchange channel 7 through a refrigerant inlet 81 of the refrigerant header seal head 8, and the heated refrigerant is led out to a production heat. The flue gas transfers heat to the refrigerant flowing through the heat exchange channel 7 through convection heat transfer, the temperature of the flue gas can be reduced to be less than or equal to 80 ℃, and the flue gas is discharged into the atmosphere through a flue gas outlet 3 of the box body 1. The heat efficiency of the invention exceeds 93 percent, and the smoke temperature in the box body 1 of the tubular heat exchanger can be controlled by adjusting the output force of the burner, thereby ensuring the continuous and stable output of the refrigerant.

Claims (10)

1. The utility model provides a concurrent heating formula scale removal tubular heat exchanger, includes the box, the left side of box is equipped with the flue gas air inlet, and the right side of box is equipped with flue gas outlet, its characterized in that: a welding end tube plate is fixedly installed at an opening of the welding port of the box body, the welding end tube plate is fixedly connected with the refrigerant header end socket through a flange and a bolt, a plurality of groups of heat exchange tubes arranged at intervals are arranged in the box body, one end of each heat exchange tube is fixedly welded with the welding end tube plate, the other end of each heat exchange tube penetrates through the lower tube plate and extends out of the box body, a U-shaped elbow is fixedly welded between the extending ends of every two heat exchange tubes in the extending ends of the plurality of groups of heat exchange tubes, so that two groups of heat exchange tubes and the U-shaped elbows form a U-shaped heat exchange channel, one end of the heat exchange channel is communicated with a refrigerant inlet of the refrigerant; the flue gas inlet of the box body is connected with the flue gas outlet of the hot blast stove through a connecting throat pipe, and the flue gas inlet of the hot blast stove is communicated with the burner interface.
2. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: the flue gas inlet of hot-blast furnace is wide-mouthed structure, and the flue gas outlet of hot-blast furnace is throat structure, and the flue gas inlet department of hot-blast furnace installs and filters the wire net.
3. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: the heat exchange tube and the lower tube plate are not welded, and the diameter of a round hole in the lower tube plate for the heat exchange tube to penetrate through is larger than the diameter of the heat exchange tube.
4. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: and a cyclone distributor is fixedly arranged at the flue gas outlet of the hot blast stove through a support.
5. The concurrent heating type descaling tubular heat exchanger of claim 4, wherein: the cyclone distributor comprises a tray body, wherein a plurality of groups of guide plates are arranged on the periphery of the tray body in an annular array, and the guide plates are arranged at an inclination angle of 45 degrees.
6. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: the inner side of the welding end tube plate is provided with a heat insulation layer, and a heat-resistant stainless steel plate is lined in the heat insulation layer.
7. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: the lower tube plate is fixedly connected with the box body, a seal box used for sealing a U-shaped elbow positioned on the outer side of the box body is fixedly installed on the lower tube plate, and a through hole used for communicating the inside of the seal box with the inside of the box body is formed in the lower tube plate.
8. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: the heat exchange tube is provided with fins.
9. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: the throat connecting pipe is an expansion corrugated cylinder, and the diameter of the throat connecting pipe is not more than 1/2 of the diameter of the hot blast stove.
10. The concurrent heating type descaling tubular heat exchanger of claim 1, wherein: and an expansion joint is arranged at a flue gas outlet of the box body.
CN202011551365.5A 2020-12-24 2020-12-24 Heat-supplementing temperature-raising type descaling tubular heat exchanger Pending CN112728968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011551365.5A CN112728968A (en) 2020-12-24 2020-12-24 Heat-supplementing temperature-raising type descaling tubular heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011551365.5A CN112728968A (en) 2020-12-24 2020-12-24 Heat-supplementing temperature-raising type descaling tubular heat exchanger

Publications (1)

Publication Number Publication Date
CN112728968A true CN112728968A (en) 2021-04-30

Family

ID=75615266

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011551365.5A Pending CN112728968A (en) 2020-12-24 2020-12-24 Heat-supplementing temperature-raising type descaling tubular heat exchanger

Country Status (1)

Country Link
CN (1) CN112728968A (en)

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