CN213515221U - High-temperature furnace smoke heat exchange device - Google Patents
High-temperature furnace smoke heat exchange device Download PDFInfo
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- CN213515221U CN213515221U CN202022557935.3U CN202022557935U CN213515221U CN 213515221 U CN213515221 U CN 213515221U CN 202022557935 U CN202022557935 U CN 202022557935U CN 213515221 U CN213515221 U CN 213515221U
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Abstract
The utility model discloses a high-temperature furnace smoke heat exchange device, the interior of a shell of the heat exchange device is divided into a plurality of cavities by an upper cavity clapboard, a plurality of middle cavity clapboards and a lower cavity clapboard, wherein, a hot primary air inlet pipeline is communicated with the inlet of the lowest cavity, a hot primary air outlet pipeline is communicated with the outlet of the uppermost cavity, and two adjacent cavities are communicated with each other by a turn-back communicating bellows; the high-temperature furnace smoke inlet pipeline is communicated with the inlet of the warm furnace smoke distribution box, the outlet of the warm furnace smoke distribution box is communicated with one end of each furnace smoke heat exchange tube, the other end of each furnace smoke heat exchange tube penetrates through the upper cavity partition plate, the middle cavity partition plate and the lower cavity partition plate and then is communicated with the inlet of the furnace smoke collecting box, and the outlet of the furnace smoke collecting box is communicated with the furnace smoke outlet pipeline; the expansion joints are arranged between the heat exchange device shell and the return communicating air box and between the heat exchange device shell and the warm-up smoke distribution box, the device can reduce the using quantity of the heat expansion joints, and meanwhile, the device is convenient to install and maintain and convenient to overhaul.
Description
Technical Field
The utility model belongs to boiler flue gas denitration field relates to a high temperature flue gas heat transfer device.
Background
In order to reduce pollutant emission and improve the quality of atmospheric environment, national and local governments set strict emission standards for the thermal power industry and require atmospheric pollutants such as NOx and SO generated by combustion of coal-fired boilers2And dust and the like are treated by denitration, dust removal and desulfurization measures.
When the denitration process for preparing ammonia by urea pyrolysis is adopted, the traditional method is to heat the hot primary air from about 300 ℃ to the process temperature of 500-600 ℃ required by pyrolysis of urea solution in a pyrolysis furnace by adopting an electric heating mode, and a large amount of electric energy needs to be consumed in the process of heating the primary air. At present, a feasible scheme is to extract high-temperature furnace smoke from a boiler furnace to exchange heat with hot primary air so as to obtain the high-temperature hot primary air. Because the heat exchange operation temperature between the high-temperature furnace smoke and the hot primary air is high, the temperature difference of 200-300 ℃ exists between the high-temperature furnace smoke side and the hot primary air side box body, and the expansion deformation of all parts of the shell is uneven easily caused in the actual operation, so that the joint welding seam of the shell and the hot primary air box is cracked and damaged. Because the temperature of the smoke of the extracted high-temperature furnace smoke is generally about 650-800 ℃, the heat exchange device has larger thermal expansion. The phenomena of expansion deformation and welding line cracking of the heat exchange tube exist in the operation of the equipment in the prior art, and great hidden danger is caused to safe operation. The heat expansion of the high-temperature operation working condition of the heat exchange tube is absorbed by the heat exchange tube with the internal expansion joint in the prior art, so that a large number of expansion joints exist in the device, the expansion joints belong to easily damaged parts, the later-stage expansion joints are large in abrasion maintenance amount, and the expansion joints are large in number and inconvenient to overhaul in the device. Meanwhile, because the high-temperature furnace smoke contains a large amount of dust, the unreasonable design of the heat exchange device easily causes the accumulation of the dust in the device, the blockage of the heat exchange tube and the system breakdown. In addition, to the current power plant of carrying out technological transformation, often there is the limited condition of on-the-spot installation space, and traditional straight-flow heat transfer device occupies installation space great, has the condition of unable installation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a high temperature furnace cigarette heat transfer device, the device can reduce the use quantity of thermal expansion festival, simple to operate simultaneously, and convenient to overhaul maintains.
In order to achieve the purpose, the high-temperature furnace smoke heat exchange device comprises a furnace smoke outlet pipeline, a furnace smoke collecting box, a high-temperature furnace smoke inlet pipeline, a warm furnace smoke distribution box, a hot primary air outlet pipeline, a hot primary air inlet pipeline, a heat exchange device shell, an upper cavity baffle plate, a lower cavity baffle plate, a plurality of furnace smoke heat exchange tubes and a plurality of middle cavity baffle plates;
the interior of the shell of the heat exchange device is divided into a plurality of chambers by an upper chamber partition plate, a plurality of middle chamber partition plates and a lower chamber partition plate, wherein a hot primary air inlet pipeline is communicated with an inlet of the lowermost chamber, a hot primary air outlet pipeline is communicated with an outlet of the uppermost chamber, and two adjacent chambers are communicated with each other by a turning-back communicating bellows;
the high-temperature furnace smoke inlet pipeline is communicated with the inlet of the warm furnace smoke distribution box, the outlet of the warm furnace smoke distribution box is communicated with one end of each furnace smoke heat exchange tube, the other end of each furnace smoke heat exchange tube penetrates through the upper cavity partition plate, the middle cavity partition plate and the lower cavity partition plate and then is communicated with the inlet of the furnace smoke collecting box, and the outlet of the furnace smoke collecting box is communicated with the furnace smoke outlet pipeline;
expansion joints are arranged between the heat exchange device shell and the return communicating air box and between the heat exchange device shell and the warm furnace smoke distribution box.
The warm furnace smoke distribution box is provided with a plurality of soot blowers.
The hot primary air inlet pipeline is communicated with the inlet of the chamber at the lowest side through the hot primary air inlet air box.
The hot primary air outlet pipeline is communicated with an outlet of the uppermost chamber through a hot primary air outlet air box.
The furnace smoke heat exchange tube is fixedly connected with the upper cavity clapboard and the lower cavity clapboard.
Two adjacent turning-back communicated air boxes are respectively positioned on two sides of the shell of the heat exchange device.
The furnace smoke collecting box is in an inverted cone structure.
The furnace smoke heat exchange device further comprises a heat exchange device support used for supporting the furnace smoke heat exchange tube.
The furnace smoke collecting box is connected with the heat exchange device shell through an expansion joint, the heat exchange device shell and the furnace smoke expand downwards in the heat exchange operation process, the lower cavity partition plate at the lower part of the furnace smoke heat exchange tube and the furnace smoke collecting box expand downwards freely, and thermal expansion displacement is absorbed through the expansion joint.
The utility model discloses following beneficial effect has:
the specific operation of high temperature furnace cigarette heat transfer device during, heat transfer device casing and warm furnace cigarette distributor box, stove cigarette collection case, hot primary air entry bellows, hot primary air export bellows and turn back and adopt the expansion joint to connect between the intercommunication bellows, the difference of thermal expansion between the thermal expansion volume of each bellows itself, the thermal expansion volume of device casing and between each bellows and the device casing all absorbs through the expansion joint, effectively prevent under the high temperature operating mode condition that the thermal expansion of device casing and each bellows warp and destroys. In addition, heat transfer device casing and stove smoke heat exchange tube in-process expand downwards, stove smoke collection case can be the free expansion downwards, the thermal energy displacement is absorbed through the expansion joint, heat transfer device casing and the heat expansion of stove smoke heat exchange tube under the high temperature operating mode during effective absorbing device operation, the deformation and the welding seam destruction of heat exchange tube have effectively been prevented, and simultaneously, adopt outside expansion joint to replace the inside expansion joint of stove smoke heat exchange tube of prior art, the quantity of expansion joint has been reduced, make the inside expansion joint that does not have of device, reduce the inside vulnerable part of device, the long-term safe operation of the device of being convenient for, overhaul and maintenance.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a sectional view taken along line a-a of the present invention.
Wherein, 1 is a heat exchange device shell, 1a is a heat exchange device support, 2 is a high-temperature furnace smoke inlet pipeline, 2a is a warm furnace smoke distribution box, 3 is an expansion joint, 4 is a furnace smoke outlet pipeline, 4a is a furnace smoke collection box, 5 is a hot primary air inlet pipeline, 5a is a hot primary air inlet air box, 6 is a turn-back communicating air box, 7 is a hot primary air outlet pipeline, 7a is a hot primary air outlet air box, 8a is an upper cavity partition plate, 8b is a middle cavity partition plate, 8c is a lower cavity partition plate, 9 is a furnace smoke heat exchange tube, and 10 is a soot blower.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 to 3, the high temperature flue gas heat exchanger of the present invention includes a flue gas outlet pipe 4, a flue gas collecting box 4a, a high temperature flue gas inlet pipe 2, a warm flue gas distributing box 2a, a hot primary air outlet pipe 7, a hot primary air inlet pipe 5, a heat exchanger housing 1, an upper cavity partition plate 8a, a lower cavity partition plate 8c, a plurality of flue gas heat exchange pipes 9, and a plurality of intermediate cavity partition plates 8 b; the interior of the heat exchange device shell 1 is divided into a plurality of chambers by an upper chamber partition plate 8a, a plurality of middle chamber partition plates 8b and a lower chamber partition plate 8c, wherein a hot primary air inlet pipeline 5 is communicated with an inlet of the lowermost chamber, a hot primary air outlet pipeline 7 is communicated with an outlet of the uppermost chamber, and two adjacent chambers are communicated with each other by a turn-back communicating bellows 6; the high-temperature furnace smoke inlet pipeline 2 is communicated with the inlet of a furnace smoke distribution box 2a, the outlet of the furnace smoke distribution box 2a is communicated with one end of each furnace smoke heat exchange pipe 9, the other end of each furnace smoke heat exchange pipe 9 passes through an upper cavity partition plate 8a, a middle cavity partition plate 8b and a lower cavity partition plate 8c and then is communicated with the inlet of a furnace smoke collecting box 4a, and the outlet of the furnace smoke collecting box 4a is communicated with a furnace smoke outlet pipeline 4; expansion joints 3 are arranged between the heat exchange device shell 1 and the return communicating air box 6 and between the heat exchange device shell and the warm furnace smoke distribution box 2 a.
A plurality of soot blowers 10 are arranged on the warm furnace smoke distribution box 2 a; the hot primary air inlet pipeline 5 is communicated with the chamber inlet at the lowest side through a hot primary air inlet air box 5 a; the hot primary air outlet pipeline 7 is communicated with an outlet of the uppermost side chamber through a hot primary air outlet air box 7 a; two adjacent turning-back communicated air boxes 6 are respectively positioned at two sides of the heat exchange device shell 1.
The utility model discloses still including being used for carrying out the heat transfer device support 1a that supports to stove cigarette heat exchange tube 9.
The furnace smoke collecting box 4a is connected with the heat exchange device shell 1 through the expansion joint 3, the heat exchange device shell 1 and the furnace smoke heat exchange tube 9 expand downwards in the operation process, the lower cavity partition plate 8c at the lower part of the furnace smoke heat exchange tube 9 and the furnace smoke collecting box 4a can freely expand downwards together, and thermal expansion displacement is absorbed through the expansion joint 3.
The utility model discloses a concrete working process does:
when the device works in a high-temperature state, the warm furnace smoke distribution box 2a, the furnace smoke collection box 4a, the primary hot air inlet air box 5a, the primary hot air outlet air box 7a, the return communicating air box 6 and the heat exchange device shell 1 are connected through the expansion joints 3, the thermal expansion amount of each air box, the thermal expansion amount of the heat exchange device shell 1 and the difference between the thermal expansion of each air box and the heat exchange device shell 1 are absorbed through the expansion joints 3, and the damage caused by uneven thermal expansion deformation of the heat exchange device shell 1 and each air box under the high-temperature working condition is effectively prevented.
During specific work, high-temperature furnace smoke enters the warm furnace smoke distribution box 2a from the high-temperature furnace smoke inlet pipeline 2, then enters the furnace smoke collection box 4a after being subjected to heat exchange and temperature reduction through the furnace smoke heat exchange pipes 9, and finally is discharged from the furnace smoke outlet pipeline 4.
The warm furnace smoke distribution box 2a is provided with a soot blower 10 which can sweep dust deposited on the upper cavity partition plate 8a and prevent the dust from accumulating and blocking the furnace smoke heat exchange tube 9.
The fume collecting box 4a is of an inverted cone structure, which is beneficial to discharging fume dust and does not generate dust accumulation.
The furnace smoke heat exchange tube 9 penetrates through the upper cavity partition plate 8a, the middle cavity partition plate 8b and the lower cavity partition plate 8c, wherein the furnace smoke heat exchange tube 9 is fixed with the upper cavity partition plate 8a and the lower cavity partition plate 8c respectively, and the furnace smoke heat exchange tube 9 and the middle cavity partition plate 8b can slide freely. The lower cavity partition plate 8c is fixed with the furnace smoke collecting box 4a, the furnace smoke collecting box 4a is connected with the heat exchange device shell 1 through the expansion joint 3, the heat exchange device shell 1 and the furnace smoke heat exchange tube 9 expand downwards in the operation process, the lower cavity partition plate 8c at the lower part of the furnace smoke heat exchange tube 9 and the furnace smoke collecting box 4a can freely expand downwards together, and thermal expansion displacement is absorbed through the expansion joint 3.
In addition, hot primary air enters a hot primary air inlet air box 5a through a hot primary air inlet pipeline 5, then each cavity returns to flow to complete heat exchange, and finally the hot primary air is discharged through a hot primary air outlet pipeline 7, the hot primary air and high-temperature furnace smoke integrally reversely flow, and the hot primary air flows through multiple times of returning, so that the heat exchange efficiency is improved, the overall design of the device is more compact, and the occupied installation space is small.
Claims (9)
1. A high-temperature furnace smoke heat exchange device is characterized by comprising a furnace smoke outlet pipeline (4), a furnace smoke collecting box (4a), a high-temperature furnace smoke inlet pipeline (2), a warm furnace smoke distribution box (2a), a hot primary air outlet pipeline (7), a hot primary air inlet pipeline (5), a heat exchange device shell (1), an upper cavity partition plate (8a), a lower cavity partition plate (8c), a plurality of furnace smoke heat exchange tubes (9) and a plurality of middle cavity partition plates (8 b);
the interior of a shell (1) of the heat exchange device is divided into a plurality of chambers by an upper chamber partition plate (8a), a plurality of middle chamber partition plates (8b) and a lower chamber partition plate (8c), wherein a hot primary air inlet pipeline (5) is communicated with an inlet of the lowermost chamber, a hot primary air outlet pipeline (7) is communicated with an outlet of the uppermost chamber, and two adjacent chambers are communicated with each other by a turning-back communicating bellows (6);
the high-temperature furnace smoke inlet pipeline (2) is communicated with the inlet of a furnace smoke distribution box (2a), the outlet of the furnace smoke distribution box (2a) is communicated with one end of each furnace smoke heat exchange tube (9), the other end of each furnace smoke heat exchange tube (9) passes through an upper cavity partition plate (8a), a middle cavity partition plate (8b) and a lower cavity partition plate (8c) and then is communicated with the inlet of a furnace smoke gathering box (4a), and the outlet of the furnace smoke gathering box (4a) is communicated with a furnace smoke outlet pipeline (4);
expansion joints (3) are arranged between the heat exchange device shell (1) and the return communicating air box (6) and between the heat exchange device shell and the warm furnace smoke distribution box (2 a).
2. A high temperature furnace smoke heat exchange device according to claim 1, characterized in that several soot blowers (10) are arranged on the distribution box (2a) of the high temperature furnace smoke.
3. A high temperature furnace smoke heat exchange device according to claim 1, characterized in that the hot primary air inlet duct (5) is in communication with the lowest chamber inlet via a hot primary air inlet windbox (5 a).
4. A high temperature furnace smoke heat exchange device according to claim 1, characterized in that the hot primary air outlet duct (7) is communicated with the outlet of the uppermost chamber through a hot primary air outlet windbox (7 a).
5. A high temperature furnace smoke heat exchange device according to claim 1, characterized in that the furnace smoke heat exchange tube (9) is fixedly connected with the upper cavity clapboard (8a) and the lower cavity clapboard (8 c).
6. The heat exchange device for the high-temperature furnace smoke according to the claim 1, wherein two adjacent turning and communicating wind boxes (6) are respectively positioned at two sides of the heat exchange device shell (1).
7. A high-temperature furnace smoke heat exchange device according to claim 1, characterized in that the furnace smoke collecting box (4a) is in an inverted cone structure.
8. A high temperature furnace smoke heat exchange device according to claim 1, further comprising a heat exchange device support (1a) for supporting a furnace smoke heat exchange tube (9).
9. A high temperature furnace smoke heat exchange device according to claim 1, wherein the furnace smoke collecting box (4a) is connected with the heat exchange device shell (1) through an expansion joint (3), the heat exchange device shell (1) and the furnace smoke heat exchange tube (9) expand downwards during operation, the lower cavity partition plate (8c) at the lower part of the furnace smoke heat exchange tube (9) and the furnace smoke collecting box (4a) can freely expand downwards together, and thermal expansion displacement is absorbed through the expansion joint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557935.3U CN213515221U (en) | 2020-11-06 | 2020-11-06 | High-temperature furnace smoke heat exchange device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557935.3U CN213515221U (en) | 2020-11-06 | 2020-11-06 | High-temperature furnace smoke heat exchange device |
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| CN213515221U true CN213515221U (en) | 2021-06-22 |
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| CN202022557935.3U Active CN213515221U (en) | 2020-11-06 | 2020-11-06 | High-temperature furnace smoke heat exchange device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161505A (en) * | 2020-11-06 | 2021-01-01 | 西安西热锅炉环保工程有限公司 | High-temperature furnace smoke heat exchange device |
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- 2020-11-06 CN CN202022557935.3U patent/CN213515221U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161505A (en) * | 2020-11-06 | 2021-01-01 | 西安西热锅炉环保工程有限公司 | High-temperature furnace smoke heat exchange device |
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