CN111895815A - Combined waste heat recovery device - Google Patents
Combined waste heat recovery device Download PDFInfo
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- CN111895815A CN111895815A CN202010776635.6A CN202010776635A CN111895815A CN 111895815 A CN111895815 A CN 111895815A CN 202010776635 A CN202010776635 A CN 202010776635A CN 111895815 A CN111895815 A CN 111895815A
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- section
- tube
- tube plate
- evaporation section
- waste heat
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Classifications
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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
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/14—Steam superheating characterised by heating method using heat generated by chemical reactions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details or component parts thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a modular waste heat recovery device, belongs to heat exchanger technical field to solve current waste heat boiler or steam superheater structure complicacy, problem that material utilization is not high. The invention comprises an equipment body, wherein the equipment body comprises a front tube box, a superheat section front tube plate, a superheat section rear tube plate, a middle cavity, an evaporation section front tube plate, an evaporation section rear tube plate, a rear tube box and two groups of heat exchange straight tubes, a tube pass inlet is formed in the front tube box, a tube pass outlet is formed in the rear tube box, a group of heat exchange straight tubes are respectively arranged between the superheat section front tube plate and the superheat section rear tube plate and between the evaporation section front tube plate and the evaporation section rear tube plate, and the tube pass of the superheat section is communicated with the tube pass of the evaporation section. The invention has compact structure, highly integrates the functions of two to three devices into one device, reduces connecting pipelines between the devices, reduces the on-way resistance of the pipelines, reduces the use of pipeline materials, has smaller occupied area and saves cost.
Description
Technical Field
The invention relates to a combined type waste heat recovery device, and belongs to the technical field of heat exchangers.
Background
In the field of chemical industry, waste heat recovery is always one of important measures for improving the thermal efficiency of a plant area. Many process flows, such as transformation, ammonia synthesis and the like, have reversible exothermic reactions, generate high-temperature process gas, and the reversible reaction cannot be completely carried out, so the process gas needs to be cooled and separated, and enters the reaction equipment again for cyclic reaction.
In the cooling process of the high-temperature process gas, in order to improve the thermal efficiency of a plant area, the heat in the process gas needs to be recycled by a waste heat recovery device, and the part of heat can be used for by-producing medium-pressure steam or superheated steam. Taking the ammonia synthesis process as an example, the process gas at the outlet of the reactor is generally about 450 ℃, the temperature of the cooled process gas is about 260 ℃, and the process gas is separated and returns to the reactor again for reaction. A typical ammonia plant employs two facilities, one steam generator for generating saturated steam and one steam superheater for further heating the saturated steam generated by the steam generator to generate superheated steam. The two devices are both U-shaped tube heat exchangers, high-temperature process gas firstly passes through a steam superheater and then passes through a steam generator, and the two devices are connected through pipelines. However, the current equipment has the following defects:
1. most of the steam superheaters adopt nickel-based heat exchange tubes, materials are expensive, and most of tail U tube sections of the steam superheaters are limited by structures and cannot participate in heat exchange, so that waste of raw materials is caused. And the manufacturing cost of the U-shaped pipe itself is higher.
2. Steam superheater adopts the U-shaped pipe, and the tube side needs to adopt the branch journey structure, need to adopt removable structure for easy maintenance, because the inlet gas temperature is high, for protective apparatus, still need set up thermal-insulated structure, leads to pipe case internals structure complicated, and it is comparatively difficult to make, install, overhaul. In order to facilitate the disassembly of the internal parts, the tube box needs to adopt a flat cover structure, which causes the waste of materials.
3. The waste heat boiler mostly adopts fountain pipe arrangement or cross pipe arrangement of weiqi, and the structure is complex. Due to the cross pipe arrangement structure of the fountain pipes or the weiqi, the structure of the pipe box internal part is complex, a series of auxiliary structures such as false pipe plates are needed to realize the function, the structure of the pipe box internal part is complex, and the manufacture, installation and maintenance are difficult. In order to facilitate the disassembly of the internal parts, the tube box needs to adopt a flat cover structure, which causes the waste of materials.
4. The fountain pipe arrangement of the waste heat boiler has different bending radius of the heat exchange pipe and length of the straight pipe section, which brings great difficulty to the manufacture of the heat exchange pipe and the manufacture of equipment.
5. Some waste heat boilers or steam superheaters adopt a bayonet tube structure, the structure is very complex, the bayonet tube is mostly a three-layer sleeve, and the material utilization rate is not high.
Disclosure of Invention
The invention provides a combined waste heat recovery device, aiming at solving the problems of complex structure and low material utilization rate of the existing waste heat boiler and steam superheater.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a modular waste heat recovery device, the device comprises a device body, the device body includes preceding pipe case, the preceding tube sheet of overheat section, the overheat section, overheat section back tube sheet, the middle chamber, the preceding tube sheet of evaporator section, the tube sheet behind the evaporator section, back tube case and two sets of heat transfer straight tubes, be equipped with the tube side entry on the preceding pipe case, be equipped with the tube side export on the back tube case, be equipped with a set of heat transfer straight tube between the preceding tube sheet of overheat section and the back tube sheet of overheat section and between the preceding tube sheet of evaporator section and the back tube sheet of evaporator section respectively, and the tube side of overheat section communicates with each other with the tube side of evaporator section, be equipped with shell saturated steam entry and superheated steam export on the overheat section, be equipped with feedwater entry and saturated steam export on the evaporator section.
Preferably, the evaporation section of the equipment body is provided with a steam drum, a wire mesh demister is arranged in the steam drum, and the saturated steam outlet is positioned at the top of the steam drum.
Preferably, the superheating section expansion joint is arranged on the superheating section of the equipment body.
Preferably, an evaporation section expansion joint is arranged on the evaporation section of the equipment body.
Preferably, the intermediate cavity is formed between the overheating section and the evaporation section of the device body through welding, flange connection or quick-opening connection.
Preferably, the intermediate chamber is provided with anti-impingement means.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has compact structure, highly integrates the functions of two to three devices into one device, reduces connecting pipelines between the devices, reduces the on-way resistance of the pipelines, reduces the use of pipeline materials, has smaller occupied area and reduces the construction investment.
2. The heat exchange tube adopts a straight tube, has no fountain type or go cross type tube arrangement structure and no complex bayonet tube type structure, reduces the difficulty in design, raw material purchase and manufacture, has high utilization rate of the superheat section heat exchange tube, has no bent tube section which does not participate in heat exchange, reduces the weight of the expensive heat exchange tube, has lower purchase cost of the straight tube heat exchange tube, and reduces the total investment of equipment.
3. The equipment of the invention is generally countercurrent heat exchange, namely, the process gas firstly passes through the overheating section and then passes through the evaporation section, the equipment is reasonable in partition, and the heat exchange efficiency is high.
4. The equipment of the invention adopts the straight tube form, the structure of the tube box internal part is simpler than the conventional structure, no complex split structure exists, the material consumption of the internal part of the tube shell side is reduced, and the internal part is usually made of nickel base or stainless steel and the like, and is expensive.
5. The invention has simpler structure of the tube box, the tube box of the equipment does not need to adopt a flat cover type, and the tube pass cylinder does not need to be overlong, thereby greatly reducing the weight of the equipment. The tube pass is made of high-temperature hydrogen-resistant steel, so that the weight is reduced, and the cost can be greatly reduced.
Drawings
FIG. 1 is a horizontal schematic view of a combined waste heat recovery device according to the present invention;
fig. 2 is a vertical schematic view of a combined waste heat recovery device of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.
Example 1: as shown in fig. 1 and fig. 2, the combined waste heat recovery device of the present embodiment includes a device body 1, the device body 1 includes a front tube box Q, a front tube plate 2 of a superheating section, a superheating section G, a rear tube plate 3 of the superheating section, an intermediate chamber Z, a front tube plate 4 of an evaporation section, an evaporation section H, a rear tube plate 5 of the evaporation section, a rear tube box E, and two sets of heat exchange straight tubes 6, a tube pass inlet Q1 is provided on the front tube box Q, a tube pass outlet E1 is provided on the rear tube box E, a set of heat exchange straight tubes 6 is respectively provided between the front tube plate 2 of the superheating section and the rear tube plate 3 of the superheating section and between, and the tube pass of the superheating section G is communicated with the tube pass of the evaporation section H, the superheating section G is provided with a shell saturated steam inlet G1 and a superheated steam outlet G2, the evaporation section H is provided with a feed water inlet H1 and a saturated steam outlet H2, and the saturated steam outlet H2 of the evaporation section H is communicated with the shell saturated steam inlet G1 of the superheating section G through a pipeline 7.
The lifting lug and the support are welded on the equipment body 1, and the structures of the lifting lug and the support can be selected by adopting a vertical structure or a bedroom structure according to the invention.
Optionally, a steam drum 1-1 is arranged on the evaporation section H of the device body 1, a wire mesh demister 1-2 or other steam-water separation devices are arranged in the steam drum 1-1 to improve the quality of saturated steam, and a saturated steam outlet H2 is located at the top of the steam drum 1-1. The process gas directly enters an evaporation section H after passing through a heat exchange straight pipe 6 of the overheating section G, and the evaporation section H is of a kettle type structure. If necessary, a steam pocket can be arranged independently, and the evaporation section H of the equipment body 1 does not adopt a kettle structure.
Optionally, a superheat section expansion joint 8 is arranged on the superheat section G of the device body 1.
Optionally, an evaporation section expansion joint 9 is arranged on the evaporation section H of the apparatus body 1.
Whether the expansion joint 8 of the overheating section and the expansion joint 9 of the evaporation section need to be additionally arranged can be judged according to the intensity calculation condition.
Optionally, the intermediate cavity Z is formed between the overheating section G and the evaporation section H of the device body 1 through welding, flange connection or quick-opening connection.
Optionally, middle chamber Z is provided with anti-shock mounting, and anti-shock mounting can set for whether need add according to actual conditions such as tube side gas flow rate.
Optionally, medium components and temperatures at different positions of the overheating section G and the evaporation section H are different, so that the overheating section G, the evaporation section H and the two groups of heat exchange straight pipes 6 can be reasonably selected and whether surfacing and surfacing materials are applied to the inner wall can be determined relatively independently. The sizes of the two groups of heat exchange straight pipes 6 of the overheating section G and the evaporation section H can be set to different specifications according to requirements.
Optionally, an internal component such as a heat insulation layer and an anti-impact device may be disposed in the front header Q as required. Alternatively, the end sockets of the front pipe box Q and the rear pipe box E may be in the form of common end sockets such as an elliptical end socket and a spherical end socket. Optionally, the whole device adopts countercurrent heat exchange to recycle the waste heat of the process gas, and saturated steam generated in the evaporation section H is introduced into the superheating section G through the pipeline 7 to finally generate superheated steam.
The invention can adopt two forms of vertical and horizontal structures.
While the invention has been described in detail and with reference to specific examples thereof, it will be understood by those skilled in the art that the foregoing examples are for the purpose of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. The utility model provides a modular waste heat recovery device which characterized in that: the device comprises a device body (1), wherein the device body (1) comprises a front tube box (Q), a superheat section front tube plate (2), a superheat section (G), a superheat section rear tube plate (3), a middle cavity (Z), an evaporation section front tube plate (4), an evaporation section (H), an evaporation section rear tube plate (5), a rear tube box (E) and two groups of heat exchange straight tubes (6), a tube pass inlet (Q1) is formed in the front tube box (Q), a tube pass outlet (E1) is formed in the rear tube box (E), a group of heat exchange straight tubes (6) are respectively arranged between the superheat section front tube plate (2) and the superheat section rear tube plate (3) and between the evaporation section front tube plate (4) and the evaporation section rear tube plate (5), a tube pass of the superheat section (G) is communicated with a tube pass of the evaporation section (H), a shell saturated steam inlet (G1) and a superheated steam outlet (G2) are formed in the superheat section (G), a saturated steam inlet (H1) and a saturated steam outlet (H2, the saturated steam outlet (H2) of the evaporation section (H) is communicated with the shell saturated steam inlet (G1) of the overheating section (G) through a pipeline (7).
2. The combined waste heat recovery device of claim 1, wherein: the evaporation section (H) of the equipment body (1) is provided with a steam drum (1-1), the steam drum (1-1) is internally provided with a wire mesh demister (1-2), and a saturated steam outlet (H2) is positioned at the top of the steam drum (1-1).
3. The combined waste heat recovery device of claim 1, wherein: an expansion joint (8) of the overheating section is arranged on the overheating section (G) of the device body (1).
4. The combined waste heat recovery device of claim 1, wherein: an evaporation section expansion joint (9) is arranged on the evaporation section (H) of the equipment body (1).
5. The combined waste heat recovery device of claim 1, wherein: an intermediate cavity (Z) is formed between the overheating section (G) and the evaporation section (H) of the equipment body (1) through welding, flange connection or quick-opening connection.
6. The combined waste heat recovery device of claim 1, wherein: the middle cavity (Z) is provided with an anti-impact device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010776635.6A CN111895815A (en) | 2020-08-05 | 2020-08-05 | Combined waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010776635.6A CN111895815A (en) | 2020-08-05 | 2020-08-05 | Combined waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111895815A true CN111895815A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010776635.6A Pending CN111895815A (en) | 2020-08-05 | 2020-08-05 | Combined waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111895815A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696652A (en) * | 2020-12-28 | 2021-04-23 | 倪加福 | Waste heat boiler |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB937301A (en) * | 1958-10-18 | 1963-09-18 | Holmes & Co Ltd W C | Improvements in or relating to heat exchangers |
| CN201129942Y (en) * | 2007-11-07 | 2008-10-08 | 李家新 | Carbon monoxide converter tube shell type main heat exchanger |
| WO2009156085A2 (en) * | 2008-06-26 | 2009-12-30 | Haldor Topsøe A/S | Process for the production of ammonia |
| CN102538516A (en) * | 2011-12-31 | 2012-07-04 | 哈尔滨锅炉厂有限责任公司 | Horizontal fixed tube sheet type heat exchanging device and method |
| CN205245115U (en) * | 2015-11-13 | 2016-05-18 | 甘肃邦众工程技术有限公司 | Novel gasifier with burn burning furnace exhaust -heat boiler |
| CN106247299A (en) * | 2016-08-10 | 2016-12-21 | 湖南安淳高新技术有限公司 | Steam generator |
| CN208832433U (en) * | 2018-07-25 | 2019-05-07 | 中国成达工程有限公司 | Superheater occurs for combined steam |
| CN210165351U (en) * | 2019-06-14 | 2020-03-20 | 南京天界三塔节能装备有限公司 | Synthetic waste heat boiler with superheated steam as byproduct |
-
2020
- 2020-08-05 CN CN202010776635.6A patent/CN111895815A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB937301A (en) * | 1958-10-18 | 1963-09-18 | Holmes & Co Ltd W C | Improvements in or relating to heat exchangers |
| CN201129942Y (en) * | 2007-11-07 | 2008-10-08 | 李家新 | Carbon monoxide converter tube shell type main heat exchanger |
| WO2009156085A2 (en) * | 2008-06-26 | 2009-12-30 | Haldor Topsøe A/S | Process for the production of ammonia |
| CN102538516A (en) * | 2011-12-31 | 2012-07-04 | 哈尔滨锅炉厂有限责任公司 | Horizontal fixed tube sheet type heat exchanging device and method |
| CN205245115U (en) * | 2015-11-13 | 2016-05-18 | 甘肃邦众工程技术有限公司 | Novel gasifier with burn burning furnace exhaust -heat boiler |
| CN106247299A (en) * | 2016-08-10 | 2016-12-21 | 湖南安淳高新技术有限公司 | Steam generator |
| CN208832433U (en) * | 2018-07-25 | 2019-05-07 | 中国成达工程有限公司 | Superheater occurs for combined steam |
| CN210165351U (en) * | 2019-06-14 | 2020-03-20 | 南京天界三塔节能装备有限公司 | Synthetic waste heat boiler with superheated steam as byproduct |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696652A (en) * | 2020-12-28 | 2021-04-23 | 倪加福 | Waste heat boiler |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201106 |
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| RJ01 | Rejection of invention patent application after publication |