CN201680350U - Large-sized two-stage thin pipe sheet waste heat boiler - Google Patents
Large-sized two-stage thin pipe sheet waste heat boiler Download PDFInfo
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- CN201680350U CN201680350U CN 201020191230 CN201020191230U CN201680350U CN 201680350 U CN201680350 U CN 201680350U CN 201020191230 CN201020191230 CN 201020191230 CN 201020191230 U CN201020191230 U CN 201020191230U CN 201680350 U CN201680350 U CN 201680350U
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Abstract
The utility model relates to a large-sized two-stage thin pipe sheet waste heat boiler, which is composed of flexible thin pipe sheets with a toggle joint, a head pipe box, a high-temperature segment cylinder, a high-temperature segment heat exchange bundled tubes, a middle pipe box, a low-temperature segment cylinder, a low-temperature segment heat exchange bundled tubes, and a rear pipe box, wherein the high-temperature segment heat exchange bundled tubes are arranged in the high-temperature segment cylinder, the low-temperature segment heat exchange bundled tubes are arranged in the low-temperature segment cylinder, and all components are connected in sequence by welding. The flexible thin pipe sheets are arranged on two ends of the high-temperature segment heat exchange bundled tubes and two ends of the low-temperature segment heat exchange bundled tubes respectively. The utility model is capable of resolving a problem of the traditional waste heat boiler that the pipe sheets are unable to bear an overlarge thermal stress between the heat exchange tubes and the cylinders under an environment of high flow rate, high temperature and high-pressure process gas, such that the pipe sheets are damaged. The large-sized two-stage thin pipe sheet waste heat boiler can be used under a technological condition of high temperature, high pressure and high flow rate.
Description
Technical field
The utility model belongs to the energy recovery use device, specifically a kind of waste heat boiler with Methodology for Flexible Thin Tube Sheet structure and two-stage type design that can stable operation under big flow, high temperature, condition of high voltage.
Background technology
Make with natural gas and oven gas etc. in the device of methyl alcohol and synthetic ammonia, from the reformed gas temperature of reburner up to 850 ℃～1100 ℃, pressure is 2MPa～4MPa, it must be cooled to about 340 ℃～550 ℃ by technological requirement, to carry out next step technical process, this part waste heat amount is big, the quality of energy is higher, recyclable utilization is for 200,000 tons of/year methanol devices, the about 160GJ/h of recyclable heat.Adopt waste heat boiler to reclaim this part waste heat at present both at home and abroad, by-product mesohigh steam is used for power or generating, and economic benefit is huge.
Because the reformed gas temperature is very high, institute's producing steam pressure adopts traditional thick tube sheet reforming gas boiler can make the thermal (temperature difference) stress of tube sheet very high more than middle pressure, so that cause tube sheet cracking to damage.In middle-size and small-size methanol device, in order to solve under the HTHP because the tubesheet intensity that the thermal (temperature difference) stress of tube sheet causes inefficacy, reforming gas boiler adopts a kind of simplified structure form thinner slightly than thick tube sheet, has reduced the thermal (temperature difference) stress of tube sheet, the destruction of having reduced tube sheet.But the waste heat boiler of this structure mostly is middle-size and small-size equipment, is used for natural gas and oven gas system methanol device more, and its scale is below 100,000 tons/year.All to 20～300,000 tons of/year scale developments, institute's producing steam pressure was also improving constantly methanol device in recent years, and along with the raising of equipment enlarging and technological parameter, the waste heat boiler of original structure has been difficult to meet the needs of production.In addition, because the increase of the flow of process gas adopts traditional one-level formula waste heat boiler that heat exchanger tube tube bank length is increased, this will cause the excessive and tube bank stability reduction of stress between shell, is unfavorable for equipment stable operation.
Summary of the invention
The purpose of this utility model be to provide a kind of can stable operation under high temperature, high pressure, big flow condition employing Methodology for Flexible Thin Tube Sheet structure and the waste heat boiler of two-stage type design, solve traditional waste heat boiler in problems such as big flow HTHP lower perforated plate damages with this, raising equipment reliability of operation is to satisfy the needs of projects such as large-scale methyl alcohol and synthetic ammonia.
The purpose of this utility model is to realize by following measure:
A kind of large-scale two-stage type Borsig waste heat boiler, be to constitute, all adopt between each parts to be welded to connect by the Methodology for Flexible Thin Tube Sheet that contains toggle, front header, high temperature section cylindrical shell, the tube bank of high temperature section heat exchanger tube, middle bobbin carriage, low-temperature zone cylindrical shell, the tube bank of low-temperature zone heat exchanger tube, rear header.The tube bank of high temperature section heat exchanger tube places in the high temperature section cylindrical shell, and the tube bank of low-temperature zone heat exchanger tube places in the low-temperature zone cylindrical shell, and the Methodology for Flexible Thin Tube Sheet that contains toggle places high temperature section heat exchanger tube tube bank two ends and low-temperature zone heat exchanger tube tube bank two ends respectively.
The thickness of above-mentioned Methodology for Flexible Thin Tube Sheet is 20mm～30mm, and the welding connecting mode of complete penetraction and fusion in welding is adopted in thin tubesheet and heat exchanger tube tube bank.Toggle and tube sheet, cylindrical shell and bobbin carriage adopt equal thickness to dock, and on tube sheet and toggle that housing is connected the flexible limit of pulling are arranged.
Two-stage refers to high-temperature heat transfer section and low-temperature heat exchange section, and high-temperature heat transfer section comprises high temperature section cylindrical shell and the tube bank of high temperature section heat exchanger tube; The low-temperature heat exchange section comprises low-temperature zone cylindrical shell and the tube bank of low-temperature zone heat exchanger tube.Two-stage all adopts the Methodology for Flexible Thin Tube Sheet structure.
The beneficial effect of advantage of the present utility model and generation:
Compare with original technology, the large-scale two-stage type Borsig waste heat boiler that the utility model is developed solved traditional waste heat boiler under big flow, high temperature, the high-pressure process compression ring border between heat exchanger tube and the cylindrical shell thermal (temperature difference) stress excessive, tube sheet is difficult to bear and problem such as flimsy.
Compare with original Fixed Tubesheet Structure, Methodology for Flexible Thin Tube Sheet is with the fixed support of heat exchanger tube tube bank as tube sheet, and tube sheet is the flat board that by tube bundle support.When heat exchanger tube tube bank and housing had the temperature difference, tube sheet and the flexible limit generation certain elastic deformation of pulling can partly compensate housing and the heat exchanger tube thermal expansion difference between restraining, thereby played the effect of expansion joint.Because the flexible limit of pulling arranged, this Methodology for Flexible Thin Tube Sheet structure decrease the stress of tube sheet edge concentrate; Simultaneously can make tube sheet programmable very thin (comparing), thereby make tube sheet under hot situation with thick tube sheet, less along the thermal (temperature difference) stress of thickness direction.Therefore, from the intensity angle, operation safe is reliable.Complete penetraction and fusion in welding connected mode between thin tubesheet and the heat exchanger tube has guaranteed the reliability of thin tubesheet and heat exchanger tube junction, has solved the crevice corrosion of water side again.
Because the process gas flow is bigger, if by one section traditional design, then the length of heat exchanger tube is longer, makes the swelling stress between shell excessive, and thin tubesheet is difficult to bear.In order to move safety and reliability, adopt the two-stage type design, first section is high temperature section, makes temperature be reduced to 450 ℃～650 ℃ by 850 ℃～1100 ℃ from technology; Second section is low-temperature zone, makes temperature be reduced to 250 ℃～350 ℃ by 450 ℃～650 ℃ from technology.The design of employing two-stage type has reduced every grade pipe range, has reduced the thermal expansion difference between heat exchanger tube and cylindrical shell, has improved the reliability of heat exchanger tube and tube sheet junction, has guaranteed the safe handling of equipment.
Description of drawings
Fig. 1 is large-scale two-stage type Borsig waste heat boiler apparatus sketch.
Fig. 2 is the Methodology for Flexible Thin Tube Sheet structural representation that Fig. 1 contains toggle.
The specific embodiment
Embodiment:
As shown in Figure 1, a kind of large-scale two-stage type Borsig waste heat boiler is to be made of the Methodology for Flexible Thin Tube Sheet 2 that contains toggle, front header 1, high temperature section cylindrical shell 3, high temperature section heat exchanger tube tube bank 4, middle bobbin carriage 5, low-temperature zone cylindrical shell 6, the tube bank 7 of low-temperature zone heat exchanger tube and rear header 8.High temperature section heat exchanger tube tube bank 4 places in the high temperature section cylindrical shell 3, and low-temperature zone heat exchanger tube tube bank 7 places in the low-temperature zone cylindrical shell 6, all adopts between each parts to be welded to connect.Containing toggle Methodology for Flexible Thin Tube Sheet 2 places the high temperature section heat exchanger tube to restrain 4 two ends respectively and the low-temperature zone heat exchanger tube is restrained 7 two ends.
Large-scale two-stage type Borsig waste heat boiler adopts the two-stage type design: first section is high-temperature heat transfer section, i.e. high temperature section cylindrical shell 3 and high temperature section heat exchanger tube tube bank 4; Second section is the low-temperature heat exchange section, i.e. low-temperature zone cylindrical shell 6 and low-temperature zone heat exchanger tube tube bank 7.High temperature section heat exchanger tube tube bank 4 places in the high temperature section cylindrical shell 3, and low-temperature zone heat exchanger tube tube bank 7 places in the low-temperature zone cylindrical shell 6.850 ℃～1100 ℃ of temperature, the high-temperature high-pressure craft gas of pressure 2～4MPa enters high temperature section by the process gas inlet of front equipment end through front header 1, and temperature is reduced to 450 ℃～650 ℃; Bobbin carriage 5 enters low-temperature zone in the warp then, and temperature is reduced to 250 ℃～350 ℃; Enter next step technological process through rear header 8 by the process gas outlet afterwards.Simultaneously, the water boiling in high temperature section cylindrical shell 3 and the low-temperature zone cylindrical shell 6 produces the mesohigh supersaturated vapor, uses for generating or power.Each level all adopts the Methodology for Flexible Thin Tube Sheet structure, contains toggle Methodology for Flexible Thin Tube Sheet 2 and places the high temperature section heat exchanger tube to restrain 4 two ends respectively and the low-temperature zone heat exchanger tube is restrained 7 two ends.
As shown in Figure 2, the Methodology for Flexible Thin Tube Sheet 2 that contains toggle is the thin tubesheet 13 of thickness 20mm～30mm, and when normal operation, the intensity of thin tubesheet 13 mainly relies on heat exchanger tube tube bank 12 to support.Thin tubesheet 13 adopts with heat exchanger tube tube bank 12 and is welded to connect, and tube bank plays the axial support effect to thin tubesheet 13.Toggle 10 adopts equal thickness to dock with thin tubesheet 13, cylindrical shell 11 and bobbin carriage 9, the toggle 10 that is connected with housing at thin tubesheet 13 has the flexible limit of pulling, when heat exchanger tube 12 and cylindrical shell 11 have the temperature difference, thin tubesheet 13 produces certain elastic deformation with the flexible limit of pulling, can partly compensate the thermal expansion difference between cylindrical shell 11 and the heat exchanger tube 12, thereby play the effect of expansion joint.
Claims (2)
1. one kind large-scale two-stage type Borsig waste heat boiler, be by the Methodology for Flexible Thin Tube Sheet that contains toggle (2), front header (1), high temperature section cylindrical shell (3), high temperature section heat exchanger tube tube bank (4), middle bobbin carriage (5), low-temperature zone cylindrical shell (6), low-temperature zone heat exchanger tube tube bank (7) and rear header (8) constitute, high temperature section heat exchanger tube tube bank (4) places in the high temperature section cylindrical shell (3), low-temperature zone heat exchanger tube tube bank (7) places in the low-temperature zone cylindrical shell (6), all adopt between each parts to be welded to connect, the Methodology for Flexible Thin Tube Sheet (2) that it is characterized in that containing toggle places high temperature section heat exchanger tube tube bank (4) two ends and low-temperature zone heat exchanger tube tube bank (7) two ends respectively.
2. a kind of large-scale two-stage type Borsig waste heat boiler according to claim 1, the Methodology for Flexible Thin Tube Sheet (2) that it is characterized in that containing toggle is the thin tubesheet (13) of thickness 20mm～30mm, thin tubesheet (13) adopts being welded to connect of complete penetraction and fusion in welding with heat exchanger tube tube bank (12), toggle (10) adopts equal thickness to dock with thin tubesheet (13), cylindrical shell (11) and bobbin carriage (9), and the toggle (10) that is connected with housing at thin tubesheet (13) has the flexible limit of pulling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020191230 CN201680350U (en) | 2010-05-13 | 2010-05-13 | Large-sized two-stage thin pipe sheet waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020191230 CN201680350U (en) | 2010-05-13 | 2010-05-13 | Large-sized two-stage thin pipe sheet waste heat boiler |
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| Publication Number | Publication Date |
|---|---|
| CN201680350U true CN201680350U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020191230 Expired - Lifetime CN201680350U (en) | 2010-05-13 | 2010-05-13 | Large-sized two-stage thin pipe sheet waste heat boiler |
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| Country | Link |
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| CN (1) | CN201680350U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013894A (en) * | 2017-04-19 | 2017-08-04 | 茂名重力石化装备股份公司 | A kind of double tubesheet combined type quenching boiler for coal chemical industry |
| CN107091471A (en) * | 2017-04-22 | 2017-08-25 | 天华化工机械及自动化研究设计院有限公司 | Coke pressure gasification process coal gas heat energy recovering method |
-
2010
- 2010-05-13 CN CN 201020191230 patent/CN201680350U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013894A (en) * | 2017-04-19 | 2017-08-04 | 茂名重力石化装备股份公司 | A kind of double tubesheet combined type quenching boiler for coal chemical industry |
| CN107091471A (en) * | 2017-04-22 | 2017-08-25 | 天华化工机械及自动化研究设计院有限公司 | Coke pressure gasification process coal gas heat energy recovering method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANHUA INSTITUTE OF CHEMICAL MACHINERY + AUTOMATI Free format text: FORMER NAME: TIANHUA CHEMICAL MACHINERY + AUTOMATION RESEARCH INST. |
|
| CP03 | Change of name, title or address |
Address after: 730060 Gansu city of Lanzhou province Xigu District Heshui Road No. 3 Patentee after: Tianhua Institute of Chemical Machinery & Automation Co., Ltd. Address before: 730050 Gansu city of Lanzhou province Xigu District Heshui Road No. 3 Patentee before: Tianhua Chemical Machinery & Automation Research Inst. Address after: 730060 Gansu city of Lanzhou province Xigu District Heshui Road No. 3 Patentee after: Tianhua Institute of Chemical Machinery & Automation Co., Ltd. Address before: 730050 Gansu city of Lanzhou province Xigu District Heshui Road No. 3 Patentee before: Tianhua Chemical Machinery & Automation Research Inst. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101222 |