CN214582553U - Double-box heat accumulating type heat exchanger - Google Patents
Double-box heat accumulating type heat exchanger Download PDFInfo
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- CN214582553U CN214582553U CN202023305798.0U CN202023305798U CN214582553U CN 214582553 U CN214582553 U CN 214582553U CN 202023305798 U CN202023305798 U CN 202023305798U CN 214582553 U CN214582553 U CN 214582553U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention provides a double-box regenerative heat exchanger, and relates to the field of industrial furnaces. This based on two casees heat accumulation formula heat exchangers, including heat accumulation formula heat transfer case, two cross valves of flexible chain, pipeline, first flow control valve, second flow control valve, combustion air frequency conversion air-blower, the frequency conversion draught fan that discharges fume and constitute, heat accumulation formula heat transfer case includes heat accumulation formula heat transfer case A and heat accumulation formula heat transfer case B, and heat accumulation formula heat transfer case A is the same with heat accumulation formula heat transfer case B structure. The gas burner adopting the double-box heat accumulating type heat exchanger technology has the advantages of taking the heating advantages of the conventional burner and the heat accumulating type burner into consideration, eliminating the heating defects of the conventional burner and the heat accumulating type burner, and having the advantages of high heat efficiency, high heating quality of a heated workpiece, high cost performance, small occupied area and the like.
Description
Technical Field
The invention relates to the technical field of industrial furnaces, in particular to a double-box heat accumulating type heat exchanger.
Background
Technological advances in industrial furnaces play a very important role in the development of industry. The heat exchanger plays a significant role in energy conservation and emission reduction of the industrial furnace, and is a gas-gas heat exchange device for heating combustion-supporting air and gas fuel by using the waste heat of flue gas discharged by the industrial furnace. The traditional metal heat exchanger has low temperature resistance, short service life, higher exhaust gas temperature and low heat exchange efficiency of about 15-25 percent. The conventional gas burner adopting combustion-supporting air without preheating or preheating through a metal heat exchanger has the defects of low heat efficiency and continuous heating, high-temperature flue gas has a longer path for heating workpieces in a convection manner in a hearth, a continuous heating area from high temperature, medium temperature and low temperature is formed, the workpieces are reasonably heated, and the heating quality of the heated workpieces is higher.
The burner regenerative heating furnace has the advantages that the burners are generally arranged in pairs, the heating effect of a heated workpiece between two sets of burners is good, a burner-free area is arranged in a hearth, the heat flow density is small, the heating is poor, particularly, a long through heating furnace is adopted, firepower is arranged in the length direction of the whole hearth by the burners to ensure the heating effect, the consumption of the burners is increased from one time to multiple times, a plurality of heating temperature areas of the hearth are required, the control is complex, the temperature gradient between the temperature areas is large, and the influence on the heating quality of the heated workpiece is large.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a double-box heat accumulating type heat exchanger, which solves the problems of small heat flow density, poor heating, low heat efficiency and the like of the existing burner heat accumulating type heating furnace.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a double-box heat accumulating type heat exchanger comprises a heat accumulating type heat exchange box, a flexible interlocking double four-way valve, a pipeline, a first flow regulating valve, a second flow regulating valve, a combustion air frequency conversion blower and a smoke exhaust frequency conversion draught fan, wherein the heat accumulating type heat exchange box comprises a heat accumulating type heat exchange box A and a heat accumulating type heat exchange box B, the heat accumulating type heat exchange box A and the heat accumulating type heat exchange box B are identical in structure, the heat accumulating type heat exchange box A comprises a steel structure, a heat insulating layer, refractory materials, a heat accumulating chamber A low-temperature cavity, a heat accumulator supporting grate, a heat accumulating chamber A high-temperature cavity, a heat accumulating chamber cover plate, smoke, a combustion air low-temperature interface A, the smoke and a combustion air high-temperature interface A, and the heat exchange box B comprises a steel structure, a heat insulating layer, refractory materials, a heat accumulating chamber B low-temperature cavity, a heat accumulator supporting grate, a heat accumulator B high-temperature cavity and a heat accumulating chamber cover plate;
the flexible interlocking double four-way valve comprises two-position four-way flue gas, an air cooling reversing valve, two-position four-way flue gas and an air heating reversing valve;
the pipeline comprises a flue gas and combustion air low-temperature pipeline A, a flue gas and combustion air low-temperature pipeline B and a low-temperature smoke exhaust pipeline.
Preferably, heat accumulation formula heat transfer case A includes the steel construction, steel construction inside wall and bottom are provided with the heat preservation, the heat preservation inside wall is provided with refractory material, constitute regenerator A in the heat preservation, fixedly connected with regenerator A low temperature chamber of bottom center department in regenerator A, regenerator A low temperature chamber top fixedly connected with regenerator supports the castor, regenerator supports castor top fixedly connected with regenerator, regenerator top fixedly connected with regenerator A high temperature chamber, regenerator A high temperature chamber top is provided with regenerator cover plate.
Preferably, heat accumulation formula heat transfer case B includes the steel construction, steel construction inside wall and bottom are provided with the heat preservation, the heat preservation inside wall is provided with refractory material, constitute regenerator B in the heat preservation, fixedly connected with regenerator B low temperature chamber of bottom center department in regenerator B, regenerator B low temperature chamber top fixedly connected with regenerator supports the castor, the regenerator supports castor top fixedly connected with regenerator, regenerator top regenerator B high temperature chamber, regenerator B high temperature chamber top is provided with regenerator cover plate.
Preferably, the side wall of the high-temperature cavity of the regenerator A of the heat accumulating type heat exchange box A is fixedly connected with flue gas and a high-temperature interface A of combustion air, the side wall of the high-temperature cavity of the regenerator B of the heat accumulating type heat exchange box B is fixedly connected with two-position four-way flue gas and a high-temperature air reversing valve, the side wall of the high-temperature cavity of the regenerator B of the heat accumulating type heat exchange box A is fixedly connected with flue gas and a high-temperature interface B of combustion air, the flue gas and the high-temperature interface B of combustion air are fixedly connected with two-position four-way flue gas and the high-temperature air reversing valve, the top of the two-position four-way flue gas and the top of the high-temperature air reversing valve are fixedly connected with a high-temperature flue gas inlet, and the bottom of the two-position four-way flue gas and the high-temperature air reversing valve is fixedly connected with a high-temperature air outlet.
Preferably, the side wall of the low-temperature cavity of the regenerator A of the heat accumulating type heat exchange box A is fixedly connected with a flue gas and a combustion-supporting air low-temperature interface A, the end surface of the flue gas and the combustion-supporting air low-temperature interface A is fixedly connected with a two-position four-way flue gas and an air-cooling reversing valve, the side wall of the low-temperature cavity of the regenerator B of the heat accumulating type heat exchange box B is fixedly connected with a flue gas and a combustion-supporting air low-temperature interface B, the flue gas and the combustion-supporting air low-temperature interface B are fixedly connected with the two-position four-way flue gas and the air-cooling reversing valve, the bottoms of the two-position four-way flue gas and the air-cooling reversing valve are connected with a first flow regulating valve through connecting pipes, the end surface of the first flow regulating valve far away from the two-position four-way flue gas and the air-cooling reversing valve is connected with a combustion-supporting air variable-frequency blower through connecting pipes, the tops of the two-position four-way flue gas and the air-cooling reversing valve are connected with a second flow regulating valve through connecting pipe, the second flow regulating valve far away from the two-position four-way flue gas, The air cooling reversing valve end is connected with a smoke discharge variable frequency draught fan through a connecting pipe, and the smoke discharge variable frequency draught fan is far away from the end face fixedly connected with low-temperature smoke discharge pipeline of the second flow regulating valve.
The working principle is as follows: the first working state structure schematic diagram of the double-box regenerative heat exchanger of the invention is shown in figure 1: combustion-supporting air is blown into the pipeline by a combustion-supporting air variable-frequency blower 13, the flow is regulated by a first flow regulating valve 14, then the combustion-supporting air enters a two-position four-way flue gas and air cooling reversing valve 15 to realize reversing, the flue gas and the combustion-supporting air enter a regenerator A low-temperature cavity 4 and a regenerator support grate 5 by a flue gas and combustion-supporting air low-temperature pipeline A12, the heat exchange between the combustion-supporting air and the regenerator 6 is realized by a high-temperature regenerator 6, at the moment, the combustion-supporting air is preheated and the regenerator 6 is cooled, the preheated combustion-supporting air flows through a regenerator A high-temperature cavity 9, and the combustion-supporting air is reversed by a two-position four-way flue gas and air heating reversing valve 21 and enters a burner from a high-temperature air outlet 25 to participate in combustion; meanwhile, high-temperature flue gas within 1100 ℃ which is intensively discharged from the heating furnace is reversed through the two-position four-way flue gas and the air heat reversing valve 21, the flue gas and the combustion-supporting air high-temperature interface B22 enter a high-temperature cavity 23 of a heat storage chamber B, the heat exchange between the high-temperature flue gas and a low-temperature heat storage body is completed through the heat storage chamber B, the high-temperature flue gas is cooled into low-temperature flue gas within 80 ℃, the heat storage body is heated to a high-temperature state, the cooled low-temperature flue gas enters a flue gas and combustion-supporting air low-temperature pipeline B18 through a low-temperature cavity 26 of the heat storage chamber B, the flue gas and a combustion-supporting air low-temperature interface B27, the reversing is realized through the two-position four-way flue gas and the air cooling reversing valve 15, the flow regulating valve 16 regulates the flow, the air is introduced into the pipeline through the smoke discharge variable-frequency induced draft fan 17, and then is discharged through the low-temperature smoke discharge pipeline 19. Similarly, the structural schematic diagram of the second working state of the double-box regenerative heat exchanger of the invention is the same as the structural schematic diagram of the first working state of the double-box regenerative heat exchanger in fig. 1 in the working principle of fig. 2. The working state A of the double-box heat accumulating type heat exchanger and the working state B of the double-box heat accumulating type heat exchanger are alternately circulated, after combustion-supporting air is efficiently preheated by the double-box heat accumulating type heat exchanger, the combustion-supporting air is continuously supplied to the burner to participate in combustion, the continuous heating of the workpiece by the burner can be realized, and meanwhile, the temperature of high-temperature flue gas within 1100 ℃ is reduced to be within 80 ℃ by the double-box heat accumulating type heat exchanger.
(III) advantageous effects
The invention provides a double-box heat accumulating type heat exchanger. The method has the following beneficial effects:
1. the invention provides a double-box heat accumulating type heat exchanger, through which when the temperature of a flue gas inlet is 1100 ℃, the temperature of a flue gas outlet is within 80 ℃, so that the limit recovery of the waste heat of the discharged flue gas of a forging heating furnace or a heat treatment heating furnace is realized, and the effects of energy conservation and emission reduction are remarkable.
2. The invention provides a double-box heat accumulating type heat exchanger, combustion air of the double-box heat accumulating type heat exchanger is efficiently preheated by the double-box heat accumulating type heat exchanger and is continuously supplied to a burner to participate in combustion, so that continuous heating of a workpiece by the burner can be realized, the double-box heat accumulating type heat exchanger is particularly suitable for a through heating furnace with the length and the width of a hearth of more than 5, high-temperature, medium-temperature and low-temperature continuous heating areas can be formed in the length direction of the hearth, the workpiece is reasonably heated, and the heating quality of the heated workpiece is higher.
3. The invention provides a double-box heat accumulating type heat exchanger, wherein a heat exchange medium and the inner wall of a box body are made of non-metal refractory materials, so that the heat exchanger has the advantages of good heat resistance, long service life and high cost performance.
4. The invention provides a double-box heat accumulating type heat exchanger, wherein double four-way valves of the double-box heat accumulating type heat exchanger are divided into a cold four-way valve and a hot four-way valve, the cold four-way valve is arranged on an upper layer, the hot four-way valve is arranged on a lower layer, the double four-way valves adopt flexible linkage, the flexible synchronization of the double four-way valves during working is ensured, and a valve plate and a valve seat of the four-way valves are reliably sealed.
Drawings
Fig. 1 is a structural schematic diagram of a first working state of a double-box regenerative heat exchanger according to the present invention;
fig. 2 is a structural diagram of a second operating state of the double-box regenerative heat exchanger according to the present invention.
Wherein, 1, a low-temperature interface A of flue gas and combustion air; 2. a steel structure; 3. a regenerator A; 4. a low-temperature cavity of the regenerator A; 5. the grate is supported by the heat accumulator; 6. a heat accumulator; 7. a heat-insulating layer; 8. a refractory material; 9. a high-temperature cavity of the regenerator A; 10. a thermal storage chamber cover plate; 11. a flue gas and combustion air high-temperature interface A; 12. a flue gas and combustion air low-temperature pipeline A; 13. a combustion air variable frequency blower; 14. a first flow regulating valve; 15. A two-position four-way smoke and air cooling change valve; 16. a second flow regulating valve; 17. a smoke discharge frequency conversion draught fan; 18. a flue gas and combustion air low-temperature pipeline B; 19. a low temperature flue gas duct; 20. a high temperature flue gas inlet; 21. a two-position four-way flue gas and air thermal reversing valve; 22. a flue gas and combustion air high-temperature interface B; 23. a high-temperature cavity of the regenerator B; 24. a regenerator B; 25. a high temperature air outlet; 26. a low-temperature cavity of the regenerator B; 27. And a low-temperature interface B for flue gas and combustion air.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1-2, an embodiment of the present invention provides a double-box heat accumulating type heat exchanger, which includes a heat accumulating type heat exchange box, a flexible interlocking double four-way valve, a pipeline, a first flow regulating valve 14, a second flow regulating valve 16, a combustion air frequency conversion blower 13, and a smoke discharge frequency conversion draught fan 17, wherein the heat accumulating type heat exchange box includes a heat accumulating type heat exchange box a and a heat accumulating type heat exchange box B, the heat accumulating type heat exchange box a and the heat accumulating type heat exchange box B have the same structure, the heat accumulating type heat exchange box a includes a steel structure 2, a heat insulating layer 7, a refractory material 8, a heat accumulating chamber a low temperature cavity 4, a heat accumulator support grate 5, a heat accumulator 6, a heat accumulating chamber a high temperature cavity 9, a heat accumulating chamber cover plate 10, smoke, a combustion air low temperature interface a1 and smoke, and a combustion air high temperature interface a11, and the heat accumulating type heat exchange box B includes a steel structure 2, a heat insulating layer 7, a refractory material 8, a heat accumulating chamber B low temperature cavity 26, a heat accumulator B low temperature cavity 26, and a smoke discharge frequency conversion draught fan B, The regenerator supports the grate 5, the regenerator 6, the regenerator B high-temperature cavity 23 and the regenerator cover plate 10;
the flexible interlocking double four-way valve comprises a two-position four-way flue gas and air cooling reversing valve 15 and a two-position four-way flue gas and air heating reversing valve 21;
the pipeline comprises a flue gas and combustion air low-temperature pipeline A12, a flue gas and combustion air low-temperature pipeline B18 and a low-temperature smoke exhaust pipeline 19.
Heat accumulation formula heat transfer case A includes steel construction 2, 2 inside walls of steel construction and bottom are provided with heat preservation 7, 7 inside walls of heat preservation are provided with refractory material 8, constitute regenerator A3 in the heat preservation 7, bottom center department fixedly connected with regenerator A low temperature chamber 4 in regenerator A3, 4 top fixedly connected with regenerators in regenerator A low temperature chamber support grate 5, 5 top fixedly connected with regenerators 6 of grate are supported to the regenerator, 6 top fixedly connected with regenerator A high temperature chamber 9 of regenerator, 9 tops in regenerator A high temperature chamber are provided with regenerator apron 10.
Heat accumulation formula heat exchange box B includes steel construction 2, 2 inside walls of steel construction and bottom are provided with heat preservation 7, 7 inside walls of heat preservation are provided with refractory material 8, constitute regenerator B24 in the heat preservation 7, bottom center department fixedly connected with regenerator B low temperature chamber 26 in regenerator B24, regenerator B low temperature chamber 26 top fixedly connected with regenerator supports castor 5, 5 top fixedly connected with regenerators 6 of regenerator support castor, 6 top regenerators B high temperature chamber 23, regenerator B high temperature chamber 23 top is provided with regenerator cover plate 10.
The side wall of a high-temperature cavity 9 of a heat accumulating chamber A of the heat accumulating type heat exchange box A is fixedly connected with flue gas and a high-temperature combustion air interface A11, the side wall of the high-temperature cavity 9 of the heat accumulating chamber A of the heat accumulating type heat exchange box A is far away from the high-temperature cavity 9 of the heat accumulating chamber A, the high-temperature flue gas and the high-temperature combustion air interface A11 are fixedly connected with two-position four-way flue gas and an air heat reversing valve 21, the side wall of a high-temperature cavity 23 of a heat accumulating chamber B of the heat accumulating type heat exchange box B is fixedly connected with flue gas and a high-temperature combustion air interface B22, the flue gas and the high-temperature combustion air interface B22 are fixedly connected with the two-position four-way flue gas and the air heat reversing valve 21, the top of the two-position four-way flue gas and the air heat reversing valve 21 is fixedly connected with a high-temperature flue gas inlet 20, and the bottom of the two-position four-way flue gas and air heat reversing valve 21 is fixedly connected with a high-temperature air outlet 25.
The side wall of a low-temperature cavity 4 of a heat accumulating chamber A of a heat accumulating type heat exchange box A is fixedly connected with a flue gas and combustion air low-temperature interface A1, the end surface of the flue gas and combustion air low-temperature interface A1 is fixedly connected with a two-position four-way flue gas and an air-cooled reversing valve 15, the side wall of a low-temperature cavity 26 of a heat accumulating chamber B of the heat accumulating type heat exchange box B is fixedly connected with a flue gas and combustion air low-temperature interface B27, the flue gas and combustion air low-temperature interface B27 is fixedly connected with the two-position four-way flue gas and the air-cooled reversing valve 15, the bottom of the two-position four-way flue gas and the air-cooled reversing valve 15 is connected with a first flow regulating valve 14 through a connecting pipe, the end surface of the air-cooled reversing valve 15 far away from the two-position four-way flue gas and far from the two-position four-way flue gas is connected with a combustion air variable frequency blower 13 through a connecting pipe, the top of the two-position four-way flue gas and air-cooled reversing valve 15 is connected with a second flow regulating valve 16 through a connecting pipe, the second flow regulating valve 16 is far away from the two-position four-way flue gas and far from the two-gas and low-temperature chamber 14, The end of the air cooling reversing valve 15 is connected with a smoke discharge variable frequency draught fan 17 through a connecting pipe, and the end face, far away from the second flow regulating valve 16, of the smoke discharge variable frequency draught fan 17 is fixedly connected with a low-temperature smoke discharge pipeline 19.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a two case heat accumulation formula heat exchanger, includes heat accumulation formula heat exchange case, the two cross valves of flexible chain, pipeline, first flow control valve (14), second flow control valve (16), combustion air frequency conversion air-blower (13), discharges fume frequency conversion draught fan (17) and constitutes its characterized in that: the heat accumulating type heat exchange box comprises a heat accumulating type heat exchange box A and a heat accumulating type heat exchange box B, the heat accumulating type heat exchange box A and the heat accumulating type heat exchange box B are identical in structure, the heat accumulating type heat exchange box A comprises a steel structure (2), a heat insulating layer (7), a refractory material (8), a heat accumulating chamber A low-temperature cavity (4), a heat accumulator supporting grate (5), a heat accumulator (6), a heat accumulating chamber A high-temperature cavity (9), a heat accumulating chamber cover plate (10), flue gas, a combustion air low-temperature interface A (1), flue gas and a combustion air high-temperature interface A (11), and the heat accumulating type heat exchange box B comprises a steel structure (2), a heat insulating layer (7), a refractory material (8), a heat accumulating chamber B low-temperature cavity (26), a heat accumulator supporting grate (5), a heat accumulator (6), a heat accumulating chamber B high-temperature cavity (23) and a heat accumulating chamber cover plate (10);
the flexible interlocking double four-way valve comprises two-position four-way smoke, an air cooling reversing valve (15) and a two-position four-way smoke and air heating reversing valve (21);
the pipeline comprises a flue gas and combustion air low-temperature pipeline A (12), a flue gas and combustion air low-temperature pipeline B (18) and a low-temperature smoke exhaust pipeline (19).
2. A double-box regenerative heat exchanger according to claim 1, wherein: heat accumulation formula heat transfer case A includes steel construction (2), steel construction (2) inside wall and bottom are provided with heat preservation (7), heat preservation (7) inside wall is provided with refractory material (8), constitute regenerator A (3) in heat preservation (7), fixedly connected with regenerator A low temperature chamber (4) is located at regenerator center in regenerator A (3), regenerator A low temperature chamber (4) top fixedly connected with regenerator supports castor (5), regenerator supports castor (5) top fixedly connected with regenerator (6), regenerator (6) top fixedly connected with regenerator A high temperature chamber (9), regenerator A high temperature chamber (9) top is provided with regenerator cover plate (10).
3. A double-box regenerative heat exchanger according to claim 1, wherein: heat accumulation formula heat transfer case B includes steel construction (2), steel construction (2) inside wall and bottom are provided with heat preservation (7), heat preservation (7) inside wall is provided with refractory material (8), constitute regenerator B (24) in heat preservation (7), fixedly connected with regenerator B low temperature chamber (26) is located at regenerator B (24) bottom center, regenerator B low temperature chamber (26) top fixedly connected with regenerator supports castor (5), regenerator supports castor (5) top fixedly connected with regenerator (6), regenerator (6) top regenerator B high temperature chamber (23), regenerator B high temperature chamber (23) top is provided with regenerator cover plate (10).
4. A double-box regenerative heat exchanger according to claim 1, wherein: heat accumulation formula heat transfer case A's regenerator A high temperature chamber (9) lateral wall fixedly connected with flue gas, combustion air high temperature interface A (11), flue gas, combustion air high temperature interface A (11) keep away from regenerator A high temperature chamber (9) end fixedly connected with two-position four-way flue gas, hot switching-over valve of air (21), regenerator B high temperature chamber (23) lateral wall fixedly connected with flue gas, combustion air high temperature interface B (22) of heat accumulation formula heat transfer case B, and flue gas, combustion air high temperature interface B (22) and two-position four-way flue gas, the hot switching-over valve of air (21) fixed connection, two-position four-way flue gas, the hot switching-over valve of air (21) top fixedly connected with high temperature flue gas inlet (20), two-position four-way flue gas, the hot switching-over valve of air (21) bottom fixedly connected with high temperature air export (25).
5. A double-box regenerative heat exchanger according to claim 1, wherein: the side wall of a low-temperature cavity (4) of a regenerator A of the heat accumulating type heat exchange box A is fixedly connected with a flue gas and a combustion air low-temperature interface A (1), the end face of the flue gas and combustion air low-temperature interface A (1) is fixedly connected with a two-position four-way flue gas and an air cooling reversing valve (15), the side wall of a low-temperature cavity (26) of a regenerator B of the heat accumulating type heat exchange box B is fixedly connected with a flue gas and a combustion air low-temperature interface B (27), the flue gas and combustion air low-temperature interface B (27) are fixedly connected with the two-position four-way flue gas and the air cooling reversing valve (15), the bottom of the two-position four-way flue gas and air cooling reversing valve (15) is connected with a first flow regulating valve (14) through a connecting pipe, the end face, far away from the two-position four-way flue gas and the air cooling reversing valve (15), of the first flow regulating valve (14) is connected with a combustion air variable-frequency blower (13) through a connecting pipe, two-position four-way flue gas, air cooling change to valve (15) top and be connected with second flow control valve (16) through the connecting pipe, second flow control valve (16) are kept away from two-position four-way flue gas, air cooling change to valve (15) end and are connected with frequency conversion draught fan (17) of discharging fume through the connecting pipe, the terminal surface fixedly connected with low temperature smoke exhaust pipe (19) of second flow control valve (16) are kept away from to frequency conversion draught fan (17) of discharging fume.
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| CN202023305798.0U CN214582553U (en) | 2020-12-30 | 2020-12-30 | Double-box heat accumulating type heat exchanger |
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| CN202023305798.0U CN214582553U (en) | 2020-12-30 | 2020-12-30 | Double-box heat accumulating type heat exchanger |
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