CN220541066U - Coal economizer with adjustable heat exchange area - Google Patents
Coal economizer with adjustable heat exchange area Download PDFInfo
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- CN220541066U CN220541066U CN202321832512.5U CN202321832512U CN220541066U CN 220541066 U CN220541066 U CN 220541066U CN 202321832512 U CN202321832512 U CN 202321832512U CN 220541066 U CN220541066 U CN 220541066U
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- heat exchange
- control valve
- collecting box
- header
- water inlet
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- 239000003245 coal Substances 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 13
- 239000002918 waste heat Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses an economizer with adjustable heat exchange area, which comprises an economizer flue part, a plurality of groups of water inlet and outlet headers, a plurality of groups of heat exchange pipes and a plurality of groups of control valves, wherein the water inlet and outlet headers are positioned outside the flue part and comprise a first header, a second header and a third header; the multiple groups of control valves comprise a first collecting box control valve, a second collecting box control valve and a third collecting box control valve; the first collecting box is respectively connected with the first collecting box control valve and the group of heat exchange tubes, the second collecting box is respectively connected with the two groups of heat exchange tubes and the second collecting box control valve, and the third collecting box is respectively connected with the third collecting box control valve and the group of heat exchange tubes; the flue gas is perpendicular to the direction of the straight pipe sections of the heat exchange pipes to carry out countercurrent heat exchange. According to the utility model, the change of heat exchange area is realized by adjusting the switch of the water inlet and outlet control valve of the header according to the change of the heat load of the flue gas, the temperature of the flue gas is controlled in a reasonable range, the dust accumulation and corrosion of the economizer are reduced to the maximum extent, the higher heat exchange efficiency is maintained, and the service life of equipment is greatly prolonged.
Description
Technical Field
The utility model belongs to the technical field of flue gas waste heat recovery, and particularly relates to an economizer with an adjustable heat exchange area.
Background
In recent years, along with the continuous release of various policies of low carbon and environmental protection in China, the low-low temperature flue gas emission technology is urgently required in the fields of thermoelectric, smelting, steel coking, chemical industry and the like, and the low-low temperature economizer is more and more widely applied and can be arranged at the front section of smoke and dust removing equipment to realize ultralow temperature emission after recovering the flue gas waste heat so as to meet the national standard requirement. However, while the economizer is widely popularized and used to solve the problem of ultra-low emission of enterprises, the exposed defects of the economizer need to be solved one by one to obtain more applicable ultra-low temperature ultra-low emission capacity. In the design process of the traditional economizer, the heat exchange area is designed according to the maximum heat exchange load demand, so that when the heat load of the actual working condition is low, namely the smoke amount is low or the smoke inlet temperature is low, the smoke can be reduced to an excessively low temperature by recovering heat through the whole set of heat exchange surfaces, the corrosion to heat exchange pipe pieces and equipment dust accumulation are aggravated, and the heat exchange efficiency and the service life of the economizer are affected.
Disclosure of Invention
Aiming at the design defects, the utility model provides the economizer with the adjustable heat exchange area, which can overcome the difficult problems of ash accumulation and corrosion due to the fact that the temperature of flue gas is reduced to be too low.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the economizer with adjustable heat exchange area includes one economizer flue, several water inlet and outlet boxes, several heat exchange pipes and several control valves, with the water inlet and outlet boxes being outside the flue and including one first, one second and one third boxes; the multiple groups of control valves comprise a first collecting box control valve, a second collecting box control valve and a third collecting box control valve; the first collecting box is respectively connected with the first collecting box control valve and the group of heat exchange tubes, the second collecting box is respectively connected with the two groups of heat exchange tubes and the second collecting box control valve, and the third collecting box is respectively connected with the third collecting box control valve and the group of heat exchange tubes; the number of the water inlet and outlet headers is the same as that of the control valves, and the control valves control the water inlet and outlet flows of the water inlet and outlet headers; the heat exchange tubes are uniformly distributed in the flue part; the flue gas is perpendicular to the direction of the straight pipe sections of the heat exchange pipes to carry out countercurrent heat exchange.
The heat exchange area is changed by adjusting the switch of the water inlet and outlet control valve according to the heat load of the flue gas, and the specific operation is as follows: when the first collecting box control valve is a water inlet control valve, the second collecting box control valve is a water inlet control valve, and the third collecting box control valve is a water outlet control valve. In the operation process of the flue gas waste heat recovery economizer, when the flue gas inlet heat load is high, a water inlet valve of the first header and a water outlet valve of the third header are opened, a water inlet valve of the second header is closed, and the total heat exchange medium water passes through the whole heat exchange pipe travel to carry out deep heat exchange so as to realize low-temperature discharge; when the heat load of the smoke inlet is low, the water inlet valve of the second header and the water outlet valve of the third header are opened, the water inlet valve of the first header is closed, the heat exchange medium water only passes through part of the travel of the heat exchange pipe, and the smoke is cooled to be discharged in a reasonable ultra-low discharge standard range.
When the first collecting box control valve is a water inlet control valve, the second collecting box control valve is a water outlet control valve, and the third collecting box control valve is a water outlet control valve. In the operation process of the flue gas waste heat recovery economizer, when the flue gas inlet heat load is high, a water inlet valve of the first header and a water outlet valve of the third header are opened, a water outlet valve of the second header is closed, and the total heat exchange medium water passes through the whole heat exchange pipe travel to carry out deep heat exchange so as to realize low-temperature discharge; when the heat load of the smoke inlet is low, the water inlet valve of the first header and the water outlet valve of the second header are opened, the water outlet valve of the third header is closed, the heat exchange medium water only passes through part of the travel of the heat exchange pipe, and the smoke is cooled to be discharged in a reasonable ultra-low discharge standard range.
The utility model has the following beneficial effects: according to the economizer with the adjustable heat exchange area, the water inlet and outlet control valve of the header is adjusted according to the change of the heat load of the flue gas to realize the change of the heat exchange area, the temperature of the flue gas is controlled to be in a reasonable range, the dust accumulation and corrosion of the economizer are reduced to the maximum extent, the higher heat exchange efficiency is maintained, and the service life of equipment is greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of an economizer with adjustable heat exchange area according to the present utility model.
Detailed Description
The technical scheme of the utility model is further specifically described below by means of specific embodiments and with reference to the accompanying drawings.
Example 1
The economizer with adjustable heat exchange area comprises an economizer flue part 1, a plurality of groups of water inlet and outlet headers 2, a plurality of groups of heat exchange pipes 3 and a plurality of groups of control valves 4, wherein the water inlet and outlet headers 2 are positioned outside the flue part 1 and comprise a first header 21, a second header 22 and a third header 23; the multiple groups of control valves 4 comprise a first header water inlet valve 41, a second header water inlet valve 42 and a third header water outlet valve 43; the first header 21 is respectively connected with a first header water inlet valve 41 and a group of heat exchange tubes 3, the second header 22 is respectively connected with two groups of heat exchange tubes 3 and a second header water inlet valve 42, and the third header 23 is respectively connected with a third header water outlet valve 43 and a group of heat exchange tubes 3; a plurality of groups of heat exchange tubes 3 are uniformly distributed in the flue part 1; the flue gas is perpendicular to the direction of the straight pipe sections of the heat exchange pipes 3 for countercurrent heat exchange.
When the heat load of the flue gas entering of the economizer is high, the first header water inlet valve 41 and the third header water outlet valve 43 are opened, the second header water inlet valve 42 is closed, and the total heat exchange medium water passes through the total heat exchange tube travel to carry out deep heat exchange to realize low-temperature discharge; when the heat load of the smoke entering is low, the second header water inlet valve 42 and the third header water outlet valve 43 are opened, the first header water inlet valve 41 is closed, the heat exchange medium water only passes through part of the travel of the heat exchange pipe, and the smoke is cooled to be discharged in a reasonable ultra-low emission standard range.
Example 2
The economizer with adjustable heat exchange area comprises an economizer flue part 1, a plurality of groups of water inlet and outlet headers 2, a plurality of groups of heat exchange pipes 3 and a plurality of groups of control valves 4, wherein the water inlet and outlet headers 2 are positioned outside the flue part 1 and comprise a first header 21, a second header 22 and a third header 23; the multiple groups of control valves 4 comprise a first header water inlet valve 41, a second header water outlet valve 42 and a third header water outlet valve 43; the first header 21 is respectively connected with the first header water inlet valve 41 and the group of heat exchange tubes 3, the second header 22 is respectively connected with the two groups of heat exchange tubes 3 and the second header water outlet valve 42, and the third header 23 is respectively connected with the third header water outlet valve 43 and the group of heat exchange tubes 3; a plurality of groups of heat exchange tubes 3 are uniformly distributed in the flue part 1; the flue gas is perpendicular to the direction of the straight pipe sections of the heat exchange pipes 3 for countercurrent heat exchange.
When the smoke inlet thermal load of the economizer is high, the first header water inlet valve 41 and the third header water outlet valve 43 are opened, the second header water outlet valve 42 is closed, and the total heat exchange medium water passes through the total heat exchange tube travel to carry out deep heat exchange to realize low-temperature discharge; when the heat load of the smoke entering is low, the water inlet valve 41 of the first header and the water outlet valve 42 of the second header are opened, the water outlet valve 43 of the third header is closed, the heat exchange medium water only passes through part of the travel of the heat exchange pipes, and the smoke is cooled to be discharged in a reasonable ultra-low emission standard range.
The embodiments of the present utility model have been disclosed above, but are not limited to the embodiments and applications listed in the specification and the embodiments, and the present utility model is also capable of various changes and modifications without departing from the principle and scope of the present utility model, which changes and modifications fall within the scope of the claimed utility model.
Claims (6)
1. The utility model provides an economizer of adjustable heat transfer area, includes economizer flue part (1), multiunit heat exchange tube (3), its characterized in that: the system also comprises a plurality of groups of water inlet and outlet headers (2) and a plurality of groups of control valves (4), wherein the water inlet and outlet headers (2) are positioned outside the flue part (1) and comprise a first header (21), a second header (22) and a third header (23); the plurality of groups of control valves (4) comprise a first header control valve (41), a second header control valve (42) and a third header control valve (43); the first collecting box (21) is respectively connected with a first collecting box control valve (41) and a group of heat exchange tubes (3), the second collecting box (22) is respectively connected with two groups of heat exchange tubes (3) and a second collecting box control valve (42), and the third collecting box (23) is respectively connected with a third collecting box control valve (43) and a group of heat exchange tubes (3).
2. The economizer with adjustable heat exchange area according to claim 1, wherein: the number of the water inlet and outlet headers (2) is the same as that of the control valves (4), and the control valves control the water inlet and outlet flows of the water inlet and outlet headers to realize heat exchange area conversion.
3. An economizer with adjustable heat exchange area according to claim 1 or 2, characterized in that: the first collecting box control valve (41) is a water inlet control valve, the second collecting box control valve (42) is a water outlet control valve, and the third collecting box control valve (43) is a water outlet control valve.
4. An economizer with adjustable heat exchange area according to claim 1 or 2, characterized in that: the first collecting box control valve (41) is a water inlet control valve, the second collecting box control valve (42) is a water inlet control valve, and the third collecting box control valve (43) is a water outlet control valve.
5. The economizer with adjustable heat exchange area according to claim 1, wherein: the heat exchange tubes (3) are uniformly distributed in the flue part (1).
6. The economizer with adjustable heat exchange area according to claim 1, wherein: the flue gas is perpendicular to the trend of the straight pipe sections of the heat exchange pipes (3) for countercurrent heat exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321832512.5U CN220541066U (en) | 2023-07-13 | 2023-07-13 | Coal economizer with adjustable heat exchange area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321832512.5U CN220541066U (en) | 2023-07-13 | 2023-07-13 | Coal economizer with adjustable heat exchange area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220541066U true CN220541066U (en) | 2024-02-27 |
Family
ID=89974460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321832512.5U Active CN220541066U (en) | 2023-07-13 | 2023-07-13 | Coal economizer with adjustable heat exchange area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220541066U (en) |
-
2023
- 2023-07-13 CN CN202321832512.5U patent/CN220541066U/en active Active
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