CN110793351A - Horizontal multi-connected tube bundle heavy oil heat exchanger - Google Patents
Horizontal multi-connected tube bundle heavy oil heat exchanger Download PDFInfo
- Publication number
- CN110793351A CN110793351A CN201911151487.2A CN201911151487A CN110793351A CN 110793351 A CN110793351 A CN 110793351A CN 201911151487 A CN201911151487 A CN 201911151487A CN 110793351 A CN110793351 A CN 110793351A
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- CN
- China
- Prior art keywords
- tube bundle
- shell
- tube
- heavy oil
- head
- 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
Links
- 239000000295 fuel oil Substances 0.000 title claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000012546 transfer Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
-
- 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
- F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- 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
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
-
- 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
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/12—Arrangements for sealing elements into header boxes or end plates by dismountable joints by flange-type connections
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A horizontal multi-connected tube bundle heavy oil heat exchanger comprises a front end head, a shell and a multi-connected tube bundle, wherein the front end head is detachably connected with one end of the shell, and the other end of the shell is fixedly connected with a rear end head to form a horizontal structure; the multi-connected tube bundle penetrates through the front end sealing head in a sealing manner, enters the lower part of the inner part of the shell and is immersed in a medium of the shell, and an evaporation space is arranged in a cavity above the shell; the multi-connected tube bundle is formed by connecting a plurality of groups of single tube bundles in a sealing way end to end through elbows to form a communication channel which is integrally connected in series. The novel shell-and-tube heat exchanger can be cleaned, is reliable in sealing, is convenient for tube bundle disassembly, can solve the problem of frequent blockage in the cooling process of high-viscosity fluid, and realizes the purpose of recycling the waste heat of high-viscosity heavy oil to generate high-quality steam.
Description
Technical Field
The invention relates to the technical field of shell-and-tube heat exchangers, in particular to a horizontal multi-connected tube bundle heavy oil heat exchanger.
Background
In the process of petroleum processing and refining, high-temperature heavy oil is often generated, and in order to recover the waste heat of the high-temperature heavy oil and meet the requirements of subsequent processing processes or storage, the high-temperature heavy oil needs to be subjected to cooling treatment. The heat exchange equipment is the common important equipment for heat recovery and heat transfer in the chemical process. The heat exchanger makes the temperature of the heavy oil in the pipe cooled to the required temperature through the heat exchange between the shell-side deoxygenated water and the pipe-side high-temperature heavy oil, and the shell-side deoxygenated water is gasified and enters a steam pipe network.
The heavy oil not only contains solid mechanical impurities such as catalyst dust, but also has the characteristics of high specific gravity, high viscosity, poor low-temperature fluidity and the like. When the flow velocity of heavy oil in the heat exchange tube is too high, on one hand, the power loss of the system is increased, and dead zones appear in the flow in the tube; on the other hand, the catalyst dust and solid mechanical impurities can cause serious erosion to the pipe wall of the equipment, which can cause the hazards of coking and blockage in the pipe, scaling outside the pipe and the like. Finally, the heat exchange channel is blocked, the heat exchanger is frequently overhauled, and the maintenance cost is high.
At present, the high-temperature heavy oil is generally treated by water tank cooling in engineering. The simple structure of water tank, the diameter of pipeline is great, adopts the coil pipe structure, and the heat medium flows in the pipeline and is difficult to produce the blind spot, but because intraductal lower velocity of flow leads to traditional water tank heat transfer efficiency lower, heat transfer area is big, equipment investment is many to the heat that the heat transfer produced does not obtain fine recycle, and a large amount of steam gives off unable the recovery in the atmosphere. Thus not only consuming a large amount of water resources, but also polluting the environment.
Therefore, the heavy oil heat exchanger which has the advantages of compact structure, land saving, difficult blockage of tube pass, easy cleaning of tube bundles, convenient loading and unloading, and simple inspection and maintenance operation is necessary.
Disclosure of Invention
The invention provides a horizontal multi-connected tube bundle heavy oil heat exchanger for recovering waste heat of high-viscosity heavy oil, which solves the problem that a heat exchange tube is blocked frequently due to coking of heavy oil in the tube, and the inconvenience that the tube bundle needs to be cleaned by opening a heat exchanger tube box and drawing out the whole tube bundle is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a horizontal multi-connected tube bundle heavy oil heat exchanger comprises a front end head, a shell and a multi-connected tube bundle, wherein the front end head is detachably connected with one end of the shell, and the other end of the shell is fixedly connected with a rear end head to form a horizontal structure; the multi-connected tube bundle penetrates through the front end sealing head in a sealing manner, enters the lower part of the inner part of the shell and is immersed in a medium of the shell, and an evaporation space is arranged in a cavity above the shell; the multi-union tube bundle is formed by connecting a plurality of groups of single tube bundles (4) in a sealing way end to end through elbows to form a communication channel which is integrally connected in series.
The single tube bundle is formed by connecting a plurality of heat exchange tubes and tube plates at two ends of the heat exchange tubes, the front end of the single tube bundle penetrates out of the front end seal head, a plurality of groups of single tube bundles penetrating out of the front end seal head are sleeved with connecting tubes, one end of each connecting tube is connected with the front end seal head in a sealing mode, and the other end of each connecting tube is connected with the tube plate of the single tube bundle in a sealing mode.
The multi-union tube bundle is formed by connecting a plurality of groups of single tube bundles end to end through elbows in a sealing manner to form a snake-shaped or U-shaped communication channel which is integrally connected in series.
The elbow is formed by connecting special-shaped joints at two ends with a 180-degree elbow; the special-shaped joints at the two ends are hermetically connected with the tube plate of the single tube bundle.
The flow cross-sectional area Sa of the 180-degree bent pipe is equal to the total flow area Sb of the single-tube-bundle heat exchange tube, namely Sa = Sb.
According to the multi-connected tube bundle structure, each single tube bundle in the multi-connected tube bundle structure is light in weight, and can be detached independently during cleaning, and the shell is drawn out; but also can improve the flow velocity of heavy oil and ensure that the flow velocities of all the flow sections of all the single tube bundles are equal. When the multi-unit tube bundle is disassembled, each group of single tube bundles can be disassembled to be connected with the front end sealing head and the connected single tube bundles in a sealing mode, the shell can be integrally and independently disassembled and drawn out, cleaning and replacement are convenient, operation and maintenance cost is saved, the elbow which is equal to the total flow area of the single tube bundle heat exchange tube is adopted, hydraulic dead zones caused by flowing of heavy oil in the tube are avoided, and the phenomenon that the heavy oil in the tube is coked and blocked due to uneven heat exchange caused by too low flow rate in the tube is. The invention has reliable sealing, convenient disassembly of the tube bundle, compact structure and small occupied area, and can effectively recover the waste heat of the heavy oil with high viscosity. The problem of frequent blockage in the cooling process of the high-viscosity fluid is solved, and the novel shell-and-tube heat exchanger for recycling the waste heat of the high-viscosity heavy oil to generate high-quality steam is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a single tube bundle extraction housing of the present invention
FIG. 3 is a schematic structural diagram of a multiple tube bundle according to the present invention;
FIG. 4 is a schematic view of FIG. 1 taken along line A;
fig. 5 is a schematic view of a single tube bundle connection structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, the horizontal multi-connected tube bundle heavy oil heat exchanger comprises a front end head 1, a shell 2 and a multi-connected tube bundle 3. The front end sealing head 1 is detachably connected with one end of the shell 2, and the other end of the shell 2 is connected with the rear end sealing head in a welding manner to form a horizontal structure; the horizontal structure is adopted to facilitate the maintenance of the shell by taking the single tube bundle out of the shell in the shell, the operation can be carried out in the horizontal direction, the installation height of the equipment can be reduced, and the stability of the equipment is improved. The multi-connected tube bundle 3 penetrates through the front end head 1, enters the lower part inside the shell 2 and is immersed in a medium of the shell 2, and an evaporation space is arranged in a cavity above the shell 2; the evaporation space is a gasification space which is arranged for improving the gasification efficiency of the shell pass medium, and the size of the space is the difference between the volume of the inner cavity of the shell 2 and the volume of the multi-connected tube bundle 3 and the volume of the medium in the shell. The medium inlet and outlet of the multi-connected tube bundle 3 are positioned on the same side and are arranged outside the front end seal head 1, the connecting flange between the shell 2 and the front end seal head 1 is disassembled, the multi-connected tube bundle 3 is integrally drawn out of the shell 2 along with the front end seal head 1, and the integral multi-connected tube bundle 3 can be cleaned and replaced. The multi-union bundle 3 is formed by connecting a plurality of groups of single tube bundles 4 end to end in a sealing way through elbows 7 to form a snakelike or U-shaped communication channel which is integrally connected in series.
The single tube bundle 4 is formed by connecting a plurality of heat exchange tubes 5 and tube plates 6 at two ends of the heat exchange tubes, the front end of the single tube bundle 4 penetrates out of the front end sealing head 1, a plurality of groups of single tube bundles 4 penetrating out of the front end sealing head 1 are sleeved with connecting tubes 8, one end of each connecting tube 8 is hermetically connected with the front end sealing head, and the other end of each connecting tube 8 is hermetically connected with the tube plate of the single tube bundle 4. The single tube bundle becomes an independent heat exchange unit, and the outside is connected to in the multi-connection tube bundle through the elbow, but dismantlement elbow and connecting pipe when needing the clearance maintenance, and the single tube bundle just can be kept apart, takes the casing out alone and clears up the maintenance, and 4 qualities of single tube bundles are light in addition, and the installation is dismantled conveniently, and 5 quantity of heat exchange tubes are suitable, do not have between the pipe and shelter from, and the decontamination is convenient, and the clearance does not have the blind spot. The maintenance cost can be greatly reduced, and the field work difficulty is reduced. The setting of connecting pipe is avoided single tube to organize directly with the front end head, and the single tube of being convenient for is restrainted and is dismantled, installs to carry out the area reinforcement to head trompil department through setting up the connecting pipe, reduce trompil department stress level.
The number of the connecting pipes 8 is equal to that of the single pipe bundles 4, and the part of each single pipe bundle 4 penetrating out of the front end seal head is sealed by the corresponding connecting pipe 8.
The elbow 7 is formed by connecting special-shaped joints 9 at two ends with a 180-degree elbow 10; the special-shaped joints 9 at the two ends are hermetically connected with the tube plates of the single tube bundle 4. The flow cross-sectional area Sa of the 180-degree elbow 10 is equal to the total flow area Sb of the single-tube bundle 4 heat exchange tube, namely Sa = Sb. The medium flow velocity at each position of the whole multi-connected tube bundle 3 is ensured to be equal, the hydraulic dead zone caused by the flow of the heavy oil in the tube is avoided, and the coking and blockage of the heavy oil in the tube due to the uneven heat exchange caused by the over-low flow velocity in the tube are prevented.
The special-shaped joint 9 and the tube plate of the single tube bundle 4 are in welded sealing connection, flange sealing connection or threaded sealing connection. For the leakage of the strictly forbidden heavy oil, when the medium of the shell is prevented from being polluted, the single tube bundle in the shell is in welding sealing connection, the shell is externally connected with the heavy oil without considering the leakage of the heavy oil by adopting a flange or a thread, the heavy oil leakage prevention shell is convenient to disassemble and assemble, and the field workload is reduced.
The front end sealing head 1 and the rear end sealing head are respectively of an oval sealing head, a spherical cap sealing head, a conical sealing head or a flat cover. The process requirements of the device, the equipment strength requirements, the installation space limitation and the like are met, and different types of end sockets are selected.
Claims (7)
1. A horizontal multi-connected tube bundle heavy oil heat exchanger comprises a front end seal head (1), a shell (2) and a multi-connected tube bundle (3), and is characterized in that the front end seal head (1) is detachably connected with one end of the shell (2), and the other end of the shell (2) is fixedly connected with a rear end seal head to form a horizontal structure; the multi-connected tube bundle (3) penetrates through the front end seal head (1) in a sealing manner, enters the lower part of the inner part of the shell (2) and is immersed in a medium of the shell (2), and an evaporation space is arranged in a cavity above the shell (2); the multi-connected tube bundle (3) is formed by connecting a plurality of groups of single tube bundles (4) end to end in a sealing way through elbows (7) to form a communication channel which is integrally connected in series.
2. The horizontal multi-connected tube bundle heavy oil heat exchanger as claimed in claim 1, characterized in that: the single tube bank (4) is formed by connecting a plurality of heat exchange tubes (5) and tube plates (6) at two ends of the heat exchange tubes, the front end head (1) is worn out from the front end of the single tube bank (4), a plurality of groups of single tube banks (4) which are worn out from the front end head (1) are sleeved with connecting tubes (8), one end of each connecting tube (8) is connected with the front end head (1) in a sealing manner, and the other end of each connecting tube is connected with the tube plates of the single tube banks (4) in a sealing manner.
3. The horizontal multi-connected tube bundle heavy oil heat exchanger as claimed in claim 1, characterized in that: the multi-union tube bundle (3) is formed by connecting a plurality of groups of single tube bundles (4) end to end in a sealing manner through elbows (7) to form a snake-shaped or U-shaped communication channel which is integrally connected in series.
4. The horizontal multi-connected tube bundle heavy oil heat exchanger as claimed in claim 3, characterized in that: the elbow (7) is formed by connecting special-shaped joints (9) at two ends with a 180-degree elbow (10); the special-shaped joints (9) at the two ends are hermetically connected with the tube plate of the single tube bundle (4).
5. The horizontal multi-connected tube bundle heavy oil heat exchanger as claimed in claim 4, characterized in that: the flow cross section Sa of the 180-degree elbow (10) is equal to the total flow area Sb of the heat exchange tubes of the single tube bundle (4), namely Sa = Sb.
6. The horizontal multi-connected tube bundle heavy oil heat exchanger as claimed in claim 4, characterized in that: the special-shaped joint (9) and the tube plate of the single tube bundle (4) are in welded sealing connection, flange sealing connection or threaded sealing connection.
7. The horizontal multi-tube bundle heavy oil heat exchanger as recited in any one of claims 1 to 6, wherein: the front end sealing head (1) and the rear end sealing head are respectively an oval sealing head, a spherical cap sealing head, a conical sealing head or a flat cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151487.2A CN110793351A (en) | 2019-11-21 | 2019-11-21 | Horizontal multi-connected tube bundle heavy oil heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151487.2A CN110793351A (en) | 2019-11-21 | 2019-11-21 | Horizontal multi-connected tube bundle heavy oil heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110793351A true CN110793351A (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911151487.2A Pending CN110793351A (en) | 2019-11-21 | 2019-11-21 | Horizontal multi-connected tube bundle heavy oil heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110793351A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704978A (en) * | 2022-03-14 | 2022-07-05 | 山东图腾制冷设备有限公司 | Shell and tube evaporator for cooling water |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2078863U (en) * | 1990-11-01 | 1991-06-12 | 刘霖沛 | Horizontal volumetric heat-exchanger with turbulent helical |
| CN202002517U (en) * | 2010-12-15 | 2011-10-05 | 广东中科天元新能源科技有限公司 | Anti-blocking shell-and-tube heat exchanger with multiple tube bundles |
| CN203413990U (en) * | 2013-06-25 | 2014-01-29 | 刘英聚 | High-temperature-resistant large-temperature-difference heat exchanger |
| CN207439208U (en) * | 2017-09-30 | 2018-06-01 | 中国石油天然气股份有限公司 | Split type heating device heat exchanger |
| RU187107U1 (en) * | 2018-11-07 | 2019-02-19 | Общество с ограниченной ответственностью "Сонорэ" | RETAILER WITH STEAM SPACE |
| CN211291112U (en) * | 2019-11-21 | 2020-08-18 | 上海蓝滨石化设备有限责任公司 | Horizontal multi-connected tube bundle heavy oil heat exchanger |
-
2019
- 2019-11-21 CN CN201911151487.2A patent/CN110793351A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2078863U (en) * | 1990-11-01 | 1991-06-12 | 刘霖沛 | Horizontal volumetric heat-exchanger with turbulent helical |
| CN202002517U (en) * | 2010-12-15 | 2011-10-05 | 广东中科天元新能源科技有限公司 | Anti-blocking shell-and-tube heat exchanger with multiple tube bundles |
| CN203413990U (en) * | 2013-06-25 | 2014-01-29 | 刘英聚 | High-temperature-resistant large-temperature-difference heat exchanger |
| CN207439208U (en) * | 2017-09-30 | 2018-06-01 | 中国石油天然气股份有限公司 | Split type heating device heat exchanger |
| RU187107U1 (en) * | 2018-11-07 | 2019-02-19 | Общество с ограниченной ответственностью "Сонорэ" | RETAILER WITH STEAM SPACE |
| CN211291112U (en) * | 2019-11-21 | 2020-08-18 | 上海蓝滨石化设备有限责任公司 | Horizontal multi-connected tube bundle heavy oil heat exchanger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704978A (en) * | 2022-03-14 | 2022-07-05 | 山东图腾制冷设备有限公司 | Shell and tube evaporator for cooling water |
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