CN213657140U - Hydrophily fan heater structure with anti-freezing function - Google Patents
Hydrophily fan heater structure with anti-freezing function Download PDFInfo
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- CN213657140U CN213657140U CN202022708560.6U CN202022708560U CN213657140U CN 213657140 U CN213657140 U CN 213657140U CN 202022708560 U CN202022708560 U CN 202022708560U CN 213657140 U CN213657140 U CN 213657140U
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Abstract
The utility model discloses a hydrophily air heater structure with anti-freezing function, which comprises at least 4 heat exchange elements which are sequentially stacked along the vertical air flow direction, wherein the water inlet side of each air exchange element is provided with a small inlet header which is connected with the water side inlet of the heat exchange element, the water outlet side is provided with a small outlet header which is sequentially communicated, and the small outlet header is connected with the water side outlet of the heat exchange element; each heat exchange element is also connected with an exhaust valve and a drain valve. The utility model discloses hydrophily fan heater prevents that hydrophily fan heater from being frozen according to ambient temperature increase and decrease heat transfer element delivery quantity from temperature and rivers velocity of flow two aspects, ensures hydrophily fan heater operation safety.
Description
Technical Field
The utility model belongs to the technical field of the boiler, a hydrophily fan heater structure with function of preventing frostbite is related to.
Background
Along with the completion of ultralow emission modification of coal-fired units in China, the ammonia escape of a denitration device is increased, and SO in flue gas3The concentration is increased, the air preheater at the downstream of the flue gas is seriously blocked and corroded, the flue gas resistance is large, and the energy consumption of the unit is high. The air heater can improve the air inlet temperature of the coal-fired boiler, further improve the cold end comprehensive temperature of the air preheater, relieve the ash blockage and corrosion of the air preheater, improve the boiler efficiency and be widely applied. The types of air heaters are mainly divided into a steam air heater, a water medium air heater, a smoke air heater and the like according to different heat sources, wherein the water medium air heater has the advantages of low energy consumption, simple system and the like compared with the steam air heater, has the advantages of small volume, low resistance and the like compared with the smoke air heater, but the water medium air heater has the defect of freezing, particularly in northern areas, when the ambient temperature in winter is lower than zero, water is used as the water medium air heaterThe air heater faces serious freezing risk, and the case that the water heater is frozen is also rare. In order to avoid freezing, part of the hydrophily air heaters are selected to quit operation in winter, so that the comprehensive temperature of the cold end of the air preheater is too low, the air preheater is seriously blocked with ash, the resistance is large, and even the load of a unit is influenced; some of the hydrophily air heaters adopt the measures of steam preheating, hot air recirculation, indoor air inlet and the like to improve the air temperature at the inlet of the hydrophily air heater, but the efficiency of the unit is reduced, so that the antifreezing technology of the hydrophily air heaters is widely concerned.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a hydrophily fan heater structure with function prevents frostbite, this structure is according to ambient temperature's change, changes hydrophily fan heater heat transfer element's operation quantity, improves heat exchanger tube bank wall temperature, prevents hydrophily fan heater frost crack, and the system is simple, improves hydrophily fan heater's security by a wide margin.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a hydrophily warm-air blower structure with function of preventing frostbite, include at least 4 heat exchange elements stacked sequentially along the direction of vertical air flow, there are inlet small header tanks to the water inlet side of each air exchange element, the inlet small header tank couples to water side entry of the heat exchange element, there are outlet small header tanks communicated sequentially to the water outlet side, the outlet small header tank couples to water side exit of the heat exchange element; each heat exchange element is also connected with an exhaust valve and a drain valve.
The utility model discloses a further improvement lies in, is provided with discharge valve on every heat transfer element's the little collection box of import, is provided with the drain valve on the little collection box of export.
The utility model discloses further improvement lies in, is provided with the drain valve on the little collection case of import, is provided with discharge valve on the little collection case of export.
The utility model discloses further improvement lies in, is provided with discharge valve and drain valve on the little collection case of import.
The utility model discloses further improvement lies in, is provided with discharge valve and drain valve on the little collection case of export.
The utility model discloses further improvement lies in, and the little collection case of import still is connected with the total collection case of import, is provided with the import isolating valve between little collection case of import and the total collection case of import.
The utility model discloses a further improvement lies in, and the export small header still is connected with the export header, is provided with the export isolating valve between export small header and the export header.
The utility model discloses a further improvement lies in, is provided with the wall temperature measurement station on every heat transfer element's the water side outlet tube bank.
When the air heater is put into operation, an inlet isolation valve and an outlet isolation valve on each heat exchange element are opened, and an exhaust valve and a drain valve are closed; when the water temperature at the water side outlet is lower than 5 ℃, closing an inlet isolating valve and an outlet isolating valve of a heat exchange element, and opening an exhaust valve and a drain valve; when the water temperature at the water side outlet of the rest heat exchange elements is lower than 5 ℃, closing an inlet isolation valve and an outlet isolation valve of one heat exchange element, and opening an exhaust valve and a drain valve; when the temperature of the water at the outlet of the water side is higher than 5 ℃ and lower than 35 ℃, the operation of the rest heat exchange elements is maintained; when the water temperature of the water side outlet of the rest heat exchange elements is higher than 35 ℃, opening an inlet isolation valve and an outlet isolation valve of one heat exchange element; and circulating the heat exchange elements in turn until all the heat exchange elements are out of operation or all the heat exchange elements are put into operation.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model has at least 4 heat exchange elements which are stacked in sequence along the vertical air flow direction, an inlet small header is arranged at the water inlet side of each air exchange element, the inlet small header is connected with the water side inlet of the heat exchange element, an outlet small header which is communicated in sequence is arranged at the water outlet side, and the outlet small header is connected with the water side outlet of the heat exchange element; each heat exchange element is also connected with an exhaust valve and a drain valve. In actual operation, the number of the heat exchange elements can be increased or reduced according to the temperature of the water side outlet, the hydrophily air heater is prevented from being frozen from the two aspects of water temperature and water flow rate, and the running safety of the hydrophily air heater is ensured.
The utility model discloses a hydrophily fan heater structure with function of preventing frostbite when the operation, can increase and decrease heat transfer element and throw in quantity according to ambient temperature, when wall temperature measurement station temperature is less than 5 ℃, reduces heat transfer element and throws in quantity to reduce hydrophily fan heater heat transfer area, reduce the waterside flow area, and then improve fan heater export temperature, improve the velocity of flow of heat exchanger tube bank water, prevent that hydrophily fan heater from freezing from temperature and water velocity two aspects. And an alarm value can be set according to the measured value of the wall temperature measuring point, so that the running safety of the hydrophily air heater is ensured.
Drawings
Fig. 1 is a top view of the structure of the water medium air heater of the present invention;
fig. 2 is a front view of the structure of the water medium air heater of the present invention.
Wherein, 1 is a first heat exchange element, 2 is a second heat exchange element, 3 is a third heat exchange element, 4 is a fourth heat exchange element, 5 is an exhaust valve, 6 is a drain valve, 7 is an inlet main header, 8 is an inlet isolation valve, 9 is an inlet small header, 10 is an outlet small header, 11 is an outlet isolation valve, 12 is an outlet main header, and 13 is a wall temperature measuring point.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element of the present invention may be said to be "secured to" or "disposed on" another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1 and 2, a hydrophily fan heater structure with function of preventing frostbite, hydrophily fan heater have the function of preventing frostbite, the utility model discloses a hydrophily fan heater adopts the design of many heat transfer component, includes the at least 4 heat transfer component that stack in proper order along perpendicular air flow direction, the utility model discloses in use 4 heat transfer component to describe as the example, 4 heat transfer component do respectively: a first heat exchange element 1, a second heat exchange element 2, a third heat exchange element 3 and a fourth heat exchange element 4; the heat exchange elements have the same structure. An inlet main header 7, an inlet isolation valve 8 and an inlet small header 9 which are sequentially communicated are arranged on the water inlet side of each air exchange element, the inlet small header 9 is connected with the water inlet of the heat exchange element, an outlet small header 10, an outlet isolation valve 11 and an outlet main header 12 which are sequentially communicated are arranged on the water outlet side, and the outlet small header 10 is connected with the water outlet of the heat exchange element; each heat exchange element comprises a gas discharge valve 5 and a water discharge valve 6. Specifically, be provided with discharge valve 5 on the little header 9 of import, be provided with drain valve 6 on the little header 10 of export, perhaps be provided with drain valve 6 on the little header 9 of import, be provided with discharge valve 5 on the little header 10 of export, perhaps be provided with discharge valve 5 and drain valve 6 on the little header 9 of import, perhaps be provided with discharge valve 5 and drain valve 6 on the little header 10 of export.
The water side outlet pipe bundle of the first heat exchange element 1 is provided with a wall temperature measuring point 13.
The utility model discloses a as above the control method of hydrophily fan heater structure with function of preventing frostbite does:
when the air heater is put into operation, opening inlet isolation valves 8 and outlet isolation valves 11 of the four heat exchange elements of the first heat exchange element 1, the second heat exchange element 2, the third heat exchange element 3 and the fourth heat exchange element 4, closing the exhaust valve 5 and the drain valve 6, and monitoring the measured value of a wall temperature measuring point 13 in real time; when the measured value is lower than 5 ℃, isolating one heat exchange element (the first heat exchange element 1) in the plurality of heat exchange elements, namely closing the inlet isolation valve 8 and the outlet isolation valve 11 of the heat exchange element, and opening the exhaust valve 5 and the drain valve 6 to drain water in the heat exchange element; continuing to monitor the wall temperature measuring points of the rest heat exchange elements, isolating one heat exchange element (the second heat exchange element 2) in the rest heat exchange elements when the temperature of the wall temperature measuring points of the rest heat exchange elements is still lower than 5 ℃, and monitoring the wall temperature measuring points of the rest heat exchange elements again with the same isolation method; when the temperature of the wall temperature measuring points of the rest heat exchange elements is higher than 5 ℃ and lower than 35 ℃, the rest heat exchange elements (the third heat exchange element 3 and the fourth heat exchange element 4) are maintained to operate; when the temperature of the wall temperature measuring points of the rest heat exchange elements is higher than 35 ℃, one of the isolated heat exchange elements (the third heat exchange element 3) is put into operation, namely the inlet isolating valve 8 and the outlet isolating valve 11 of the heat exchange element (the first heat exchange element 1) are opened; and circulating the heat exchange elements in turn until all the heat exchange elements are out of operation or all the heat exchange elements are put into operation.
The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to be changed. However, all changes which come within the scope of the independent claims of the invention are to be embraced therein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Claims (8)
1. A hydrophily warm-air blower structure with function of preventing frostbite, wherein include at least 4 heat exchange elements stacked sequentially along the direction of vertical air flow, there are inlet small header tanks (9) on the water inlet side of each air exchange element, the inlet small header tank (9) couples to water side entry of the heat exchange element, there are outlet small header tanks (10) communicated sequentially on the water outlet side, the outlet small header tank (10) couples to water side outlet port of the heat exchange element; each heat exchange element is also connected with a vent valve (5) and a drain valve (6).
2. The structure of the hydrophily fan heater with the anti-freezing function as claimed in claim 1, wherein the inlet small header (9) of each heat exchange element is provided with a vent valve (5), and the outlet small header (10) is provided with a drain valve (6).
3. The structure of the hydrophily fan heater with the anti-freezing function as claimed in claim 1, wherein the inlet small header (9) is provided with a drain valve (6), and the outlet small header (10) is provided with a vent valve (5).
4. The structure of the hydrophily fan heater with antifreezing function as claimed in claim 1, wherein the inlet small header (9) is provided with an exhaust valve (5) and a drain valve (6).
5. The structure of the waterborne heater with the antifreezing function as defined in claim 1, wherein the outlet small header (10) is provided with an exhaust valve (5) and a drain valve (6).
6. The structure of the hydrophily fan heater with the anti-freezing function as claimed in claim 1, wherein the small inlet header (9) is further connected with an inlet main header (7), and an inlet isolating valve (8) is arranged between the small inlet header (9) and the inlet main header (7).
7. The structure of the hydrophily warm-air drier with antifreezing function as claimed in claim 1, wherein the small outlet header (10) is further connected with an outlet main header (12), and an outlet isolating valve (11) is arranged between the small outlet header (10) and the outlet main header (12).
8. The structure of the waterborne heater with the antifreezing function as defined in claim 1, wherein the water side outlet tube bundle of each heat exchange element is provided with a wall temperature measuring point (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022708560.6U CN213657140U (en) | 2020-11-21 | 2020-11-21 | Hydrophily fan heater structure with anti-freezing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022708560.6U CN213657140U (en) | 2020-11-21 | 2020-11-21 | Hydrophily fan heater structure with anti-freezing function |
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| CN213657140U true CN213657140U (en) | 2021-07-09 |
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| CN202022708560.6U Active CN213657140U (en) | 2020-11-21 | 2020-11-21 | Hydrophily fan heater structure with anti-freezing function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283949A (en) * | 2020-11-21 | 2021-01-29 | 西安热工研究院有限公司 | Water-borne air heater structure with anti-freezing function and control method |
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2020
- 2020-11-21 CN CN202022708560.6U patent/CN213657140U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283949A (en) * | 2020-11-21 | 2021-01-29 | 西安热工研究院有限公司 | Water-borne air heater structure with anti-freezing function and control method |
| CN112283949B (en) * | 2020-11-21 | 2024-05-31 | 西安热工研究院有限公司 | Water-medium air heater structure with anti-freezing function and control method |
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