CN213686903U - High-efficiency low-temperature corrosion-free air preheater - Google Patents
High-efficiency low-temperature corrosion-free air preheater Download PDFInfo
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- CN213686903U CN213686903U CN202022282273.3U CN202022282273U CN213686903U CN 213686903 U CN213686903 U CN 213686903U CN 202022282273 U CN202022282273 U CN 202022282273U CN 213686903 U CN213686903 U CN 213686903U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a high efficiency does not have air heater of low temperature corrosion, including the preheater of combination, drum induced air systematic arrangement and the heat transfer in turn of gas and wind, the preheater of combination comprises high temperature section and low temperature section, drum induced air systematic arrangement comprises the draught fan of arranging behind the high temperature section of preheater, before the low temperature section, the air-blower of air supply and the cigarette wind channel of connecting preheater and draught fan, a plurality of control valve, the heat transfer in turn of gas and wind is controlled flue gas and air and is cooperated heat transfer in turn in air heater by the control valve and constitutes, and the cigarette wind channel includes flue and wind channel, the flue divide into high temperature flue, with the low temperature flue, the wind channel divide into high temperature wind channel and low temperature wind channel, can effectually improve its heat exchange efficiency, avoided the low temperature dew point corrosion's the condition, improved the smoothness of operation, The stability of the furnace pressure of the heating furnace is ensured, and the service performance of the device is improved.
Description
Technical Field
The utility model relates to a heating furnace air heater technical field specifically is a high efficiency does not have low temperature corrosion's air heater.
Background
Heating furnace provides the center of energy as all kinds of apparatus for producing in the national industry, has irreplaceable effect, and in order to improve heating furnace efficiency, the heating furnace sets up air heater more, carries out flue gas waste heat recovery, and in recent years, new development has used gyration heat accumulation formula air heater, switching-over heat accumulation box formula air heater etc..
The existing air preheater has certain disadvantages when in use;
1. the heating furnace has low efficiency caused by high exhaust gas temperature, and has the problems of low-temperature dew point corrosion, easy corrosion of heat exchange elements, deformation, air leakage and the like.
2. The pressure fluctuation of the hearth is large, the risk of flameout and backfire exists, and the use performance of the device is influenced.
Based on this, the utility model designs a high efficiency does not have low temperature corrosion's air heater in order to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high efficiency does not have low temperature corrosion's air heater to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the high-efficiency low-temperature corrosion-free air preheater comprises a combined preheater, a drum induced air system and a smoke and air alternate heat exchange device, wherein the combined preheater consists of a high-temperature section and a low-temperature section;
the smoke air duct comprises a flue and an air duct, the flue is divided into a high-temperature flue and a low-temperature flue, the air duct is divided into a high-temperature air duct and a low-temperature air duct, the high-temperature flue, the high-temperature section of the preheater, the draught fan and the low-temperature flue are sequentially connected with the low-temperature section of the preheater, and the air blower, the low-temperature air duct, the low-temperature section of the preheater and the high-temperature air duct are sequentially connected with.
Preferably, the temperature of the high-temperature section of the preheater is above the low-temperature dew point corrosion temperature after heat exchange according to the flue gas.
Preferably, the high-temperature section is one of a split type or an integrated type, the preheater can be one of a common tubular preheater or a regenerative preheater, and the low-temperature section is composed of at least two preheaters made of regenerative ceramics.
Preferably, when the high-temperature section is split, the low-temperature flue, the low-temperature air duct, the low-temperature section of the preheater, the high-temperature flue, the high-temperature air duct and the high-temperature section of the preheater are one heat exchange unit, and the number of the heat exchange units is at least two.
Preferably, when the high-temperature section is integrated, the low-temperature flue, the low-temperature air duct and the low-temperature section of the preheater form a heat exchange unit.
Preferably, when one heat exchange unit passes through the flue gas, the control valve on the air duct of the group is closed to stop the air, and the control valve on the air duct of the other heat exchange unit is opened to stop the flue gas when the air passes through the flue gas.
Compared with the prior art, the beneficial effects of the utility model are that: the corresponding control of the smoke air duct is controlled by the control valve group, smoke exchanges heat in one heat exchange unit of the preheater, air exchanges heat in the other heat exchange unit, the temperature of the smoke can be as low as 60 ℃ after passing through a high-temperature section and a low-temperature section, the low-temperature section of the ceramic regenerative preheater has no low-temperature corrosion problem, the low-temperature section further exchanges heat to improve heat recovery and further improve the efficiency of the heating furnace, after the smoke and the air exchange heat in respective heat exchange units, the control valves are automatically and sequentially switched, the smoke and the air exchange units exchange heat, the switching process is seamlessly connected, the smoke and the air are ensured not to be connected in series, the operation is stable, the pressure of the furnace chamber is stable, more than two heat exchange units can be used, the heat exchange efficiency and the operation stability can be further improved, the heat exchange efficiency of the air preheater can be effectively improved, the condition of low-temperature, The stability of the furnace pressure of the heating furnace is ensured, and the service performance of the device is improved.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
01. 02, 03, 04, 07, 08, 09, 10, 12, 13, 16, 17, 18, 19 control valves; 05. 06 high-temperature section; 11 an induced draft fan; 14. 15 low-temperature section; 20 blower.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a high efficiency air preheater without low temperature corrosion: a high-efficiency air preheater without low-temperature corrosion comprises a combined preheater, a drum induced air system arrangement and smoke air alternate heat exchange, wherein the combined preheater consists of high- temperature sections 05 and 06 and low- temperature sections 14 and 15. The high-temperature section is a metal box body structure with a clamping groove in the inside, wherein a fin metal plate is placed in the clamping groove, and the arranged fin metal plates play a role in heat storage and heat release of the high-temperature section. The low temperature section is by the metal box structure of taking the inside lining, wherein lays the honeycomb ceramic piece in the box, and the inside lining can play anticorrosion and heat preservation effect, and regular honeycomb ceramic piece plays low temperature section heat accumulation and exothermic effect. The drum induced air system is arranged by an induced draft fan 11 arranged behind high- temperature sections 05 and 06 and in front of low- temperature sections 14 and 15 of the preheater, an air blower 20 for supplying air, a smoke channel connecting the preheater and the induced draft fan, and control valves 01, 02, 03, 04, 07, 08, 09, 10, 12, 13, 16, 17, 18 and 19, wherein smoke and air are controlled by the control valves 01, 02, 03, 04, 07, 08, 09, 10, 12, 13, 16, 17, 18 and 19 to be matched with the air preheater for alternating heat exchange to form smoke and air, and the control valves 01, 02, 03, 04, 07, 08, 09, 10, 12, 13, 16, 17, 18 and 19 correspond to the smoke channel;
the flue comprises a high-temperature flue and a low-temperature flue, the air flue comprises a high-temperature flue and a low-temperature air flue, the high- temperature section 05, 06 of the preheater, the induced draft fan 11 and the low-temperature flue are sequentially connected with the low- temperature section 14, 15 of the preheater, and the air blower 11, the low-temperature air flue, the low- temperature section 14, 15 of the preheater and the high-temperature air flue are sequentially connected with the high.
The high temperature sections 05 and 06 of the preheater are above the low temperature dew point corrosion temperature according to the temperature after heat exchange of the flue gas.
The high- temperature sections 05 and 06 are one of split type or integrated type, the preheater can adopt one of common tubular preheater or heat accumulating type preheater, the low- temperature sections 14 and 15 at least comprise two heat accumulating ceramics, the temperature of the flue gas can be above 140 ℃ after heat exchange through the high- temperature sections 05 and 06, then the flue gas enters the heat accumulating ceramics low- temperature sections 14 and 15 through the draught fan for heat exchange, the temperature can be as low as 60 ℃, the corrosion of low-temperature leakage points can be effectively avoided, the heat exchange efficiency of the preheater is improved, and the temperature of the flue gas is reduced to about 60 ℃ from the conventional 140-plus-material 120 ℃, so that the efficiency of the heating furnace is greatly improved.
When the high- temperature sections 05 and 06 are split, the low-temperature flue, the low-temperature air duct, the low- temperature sections 14 and 15 of the preheater, the high-temperature flue, the high-temperature air duct and the high- temperature sections 05 and 06 of the preheater are a heat exchange unit, the number of the heat exchange units is at least two, the flue gas and the air exchange heat alternately in the heat exchange units, the alternate heat exchange of the flue gas and the air is controlled by alternately matching hot phases and cold phases, and the flow stability of the flue gas and the air is ensured while the complementary influence of the.
When the high- temperature sections 05 and 06 are integrated, the low-temperature flue, the low-temperature air duct and the low- temperature sections 14 and 15 of the preheater form a heat exchange unit, and the flue gas and the air exchange heat alternately in the heat exchange unit.
When one heat exchange unit passes through the flue gas, the control valve on the air channel of the group is closed to cut off the air, the control valve on the air channel of the other heat exchange unit is opened, the flue control valve is closed to cut off the flue gas through the air, and the flue control valve is opened and closed to act, so that the sequential switching of the heat exchange units is realized, the pressure stability of a furnace chamber of the heating furnace is ensured, and the air volume of the flue gas is not influenced by reversing.
One specific application of this embodiment is: the high-temperature flue gas passes through the high-temperature flue → the control valve 01 → the high-temperature section 05 of the preheater → the control valve 07 → the induced draft fan 11 → the control valve 12 → the low-temperature section 14 of the preheater → the low-temperature flue → the control valve 18 → is discharged, and meanwhile, the flue control valves 02, 08, 13 and 19 are closed; the low-temperature air passes through the blower 20 → the low-temperature air channel → the control valve 17 → the heat accumulating type preheater low-temperature section 15 → the control valve 10 → the preheater high-temperature section 06 → the high-temperature air channel → the control valve 04 → the heating furnace, meanwhile, the air channel control valves 16, 09 and 03 are closed, and when the flue gas exchanges heat in one heat exchange unit, the air exchanges heat in the other heat exchange unit, and the heat exchange units do not influence each other.
The utility model discloses, through the corresponding cigarette wind channel control of valve unit control, the flue gas heat transfer in a pre-heater heat transfer unit, the air heat transfer in another heat transfer unit simultaneously, the flue gas can be low to 60 ℃ through high temperature section and low temperature section aftertemperature, pottery regenerative pre-heater low temperature section does not have the low temperature corrosion problem, the further heat transfer of low temperature section improves heat recovery and then improves heating furnace efficiency, flue gas and air have exchanged the heat back at respective heat transfer unit, the control valve carries out automatic order switching, flue gas and air exchange unit carry out the heat transfer, the switching process links up seamlessly, when guaranteeing that flue gas and air are not concatenated, operate steadily, furnace pressure is stable, heat transfer unit can be more than two, can further increase the stationarity of heat transfer efficiency and operation, this air pre-heater can effectually improve its heat transfer efficiency, the condition of low temperature dew point corrosion has been avoided, The stability of the operation is improved, the stability of the furnace pressure of the heating furnace is ensured, and the use performance of the device is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The high-efficiency air preheater without low-temperature corrosion is characterized by comprising a combined preheater, a drum induced air system and a smoke air alternate heat exchange device, wherein the combined preheater consists of a high-temperature section and a low-temperature section;
the flue includes flue and wind channel, the flue divide into high temperature flue, with the low temperature flue, the wind channel divide into high temperature wind channel and low temperature wind channel, the high temperature section of high temperature flue, pre-heater, draught fan, low temperature flue connect gradually with the low temperature section of pre-heater, the low temperature section of air-blower, low temperature wind channel, pre-heater, high temperature wind channel connect gradually with the high temperature section of pre-heater.
2. A high efficiency, low temperature corrosion free air preheater as recited in claim 1, wherein: and the temperature of the high-temperature section of the preheater is above the low-temperature dew point corrosion temperature after heat exchange according to the flue gas.
3. A high efficiency, low temperature corrosion free air preheater as recited in claim 1, wherein: the high-temperature section is one of a split type or an integrated type, the preheater can be one of a common tubular preheater or a regenerative preheater, and the low-temperature section at least comprises two preheaters made of regenerative ceramics.
4. A high efficiency, low temperature corrosion free air preheater as recited in claim 3, wherein: when the high-temperature section is split, the low-temperature flue, the low-temperature air duct, the low-temperature section of the preheater, the high-temperature flue, the high-temperature air duct and the high-temperature section of the preheater are heat exchange units, and the number of the heat exchange units is at least two.
5. A high efficiency, low temperature corrosion free air preheater as recited in claim 3, wherein: when the high-temperature section is integrated, the low-temperature flue, the low-temperature air duct and the low-temperature section of the preheater form a heat exchange unit.
6. A high efficiency low temperature corrosion free air preheater as claimed in claim 4 or 5, wherein: one when the heat exchange unit passes through by the flue gas, the control valve on this group's wind channel is closed, cuts off the air, another the control valve on heat exchange unit's the wind channel is opened, through the air, flue control valve is closed, cuts off the flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022282273.3U CN213686903U (en) | 2020-10-14 | 2020-10-14 | High-efficiency low-temperature corrosion-free air preheater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022282273.3U CN213686903U (en) | 2020-10-14 | 2020-10-14 | High-efficiency low-temperature corrosion-free air preheater |
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| CN213686903U true CN213686903U (en) | 2021-07-13 |
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| CN202022282273.3U Active CN213686903U (en) | 2020-10-14 | 2020-10-14 | High-efficiency low-temperature corrosion-free air preheater |
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