CN220669484U - Waste heat exchange device and waste heat boiler - Google Patents
Waste heat exchange device and waste heat boiler Download PDFInfo
- Publication number
- CN220669484U CN220669484U CN202322293759.0U CN202322293759U CN220669484U CN 220669484 U CN220669484 U CN 220669484U CN 202322293759 U CN202322293759 U CN 202322293759U CN 220669484 U CN220669484 U CN 220669484U
- Authority
- CN
- China
- Prior art keywords
- waste heat
- heat pipe
- exchange device
- heat exchange
- liquid side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002918 waste heat Substances 0.000 title claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 35
- 238000011084 recovery Methods 0.000 claims description 10
- 238000005245 sintering Methods 0.000 abstract description 22
- 238000004064 recycling Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229920006395 saturated elastomer Polymers 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010808 liquid waste Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
According to one aspect of the present utility model, there is provided a waste heat exchange device comprising: the air side heat pipe is provided with an air side inlet and an air side outlet; a liquid side heat pipe having a liquid side inlet and a liquid side outlet; the air side heat pipe and the liquid side heat pipe are arranged in contact with each other on the surface of the main body part; in the use state, the heat exchange device is arranged obliquely relative to the horizontal plane. According to another aspect of the present utility model, there is also provided a waste heat boiler, wherein the waste heat boiler comprises a boiler body and a waste heat exchange device as set forth above. The waste heat exchange device and the waste heat boiler using the waste heat exchange device can effectively carry out deep recycling on the return air waste heat of the sintering waste heat boiler.
Description
Technical Field
The present application relates generally to the field of smelting sintering technology, and more particularly, to a waste heat exchange device and a waste heat boiler.
Background
The use of sintering waste heat is one of the important problems in the iron and steel industry production. Sintering refers to the process of adding a proper amount of fuel and solvent into a powdery iron-containing raw material before blast furnace ironmaking, adding a proper amount of water, and sintering the mixture into blocks on a sintering machine. The energy consumption of the sintering process of the China iron and steel enterprises accounts for 15% of the total energy consumption of the iron and steel enterprises, and is the second most energy-consuming process next to iron making. The waste heat resource in the sintering process comprises two parts, namely, the sensible heat of the sintering ore and the sensible heat of the sintering flue gas, which respectively account for 40% -45% and 15% -20% of the total heat of the sintering process, the sintering waste heat belongs to a medium-low quality heat source, the heat of the two parts can be directly recycled for hot air sintering, hot air ignition combustion supporting and sintering mixture drying, and in addition, the heat can also be used for generating steam, hot water and low-temperature heating. Therefore, the full utilization of the heat is of great significance for energy conservation and emission reduction of iron and steel enterprises
At present, a conventional flue gas waste heat boiler is still used for recovering the waste heat of the cooling air of the sinter, namely, the design value of the exhaust temperature of the boiler still reaches 150 ℃, and the higher return air temperature not only reduces the waste heat recovery efficiency of the boiler, but also can not cool the sinter well. In fact, the sinter cooling air is common hot air, and besides a small amount of granular dust, the acid corrosion phenomenon during flue gas waste heat recovery does not occur, so that a low-temperature heat exchange device is added, the temperature of the cooling air is further reduced while the cooling air heats boiler water supply, and the dual purposes of improving the heat efficiency of the boiler and improving the sinter cooling effect can be achieved, and related technical researches and applications are blank.
In the research field of low-temperature heat exchangers, especially in the field of conventional flue gas waste heat boilers, the researcher spends great effort on avoiding dew point corrosion, and the outlet temperature of flue gas is usually required to be above 130 ℃, which makes the research thought not applicable to the recovery of the waste heat of sinter cooling wind, because the temperature of the gas flowing out of the heat exchanger can be reduced to below 100 ℃ without considering corrosion problem under the condition that pure air is taken as sinter cooling wind, and the possibility of condensation of water vapor is completely avoided, and the heat exchange condition is quite different from that under the flue gas condition. Therefore, the research on the gas-liquid heat exchange technology under the conditions of pure air, ultralow temperature and small heat exchange temperature difference is an original work from the technical development point of view.
Disclosure of Invention
The present disclosure summarizes aspects of the embodiments and should not be used to limit the claims. Other embodiments may be envisaged in light of the techniques described herein, as will be apparent to those of ordinary skill in the art upon studying the following drawings and detailed description, and are intended to be included within the scope of the present application.
According to one aspect of the present utility model, there is provided a waste heat exchange device comprising:
the air side heat pipe is provided with an air side inlet and an air side outlet;
a liquid side heat pipe having a liquid side inlet and a liquid side outlet;
the air side heat pipe and the liquid side heat pipe are arranged in contact with each other on the surface of the main body part;
in the use state, the heat exchange device is arranged obliquely relative to the horizontal plane.
In one embodiment, the gas side inlet is disposed at a top of the gas side heat pipe and the gas side outlet is disposed at a bottom of the gas side heat pipe.
In another embodiment, the liquid side inlet is disposed at the bottom of the liquid side heat pipe and the liquid side outlet is disposed at the top of the liquid side heat pipe.
In yet another embodiment, a collection tank is provided on the liquid side outlet, the collection tank being in communication with a deaerator of the waste heat boiler.
In yet another embodiment, wherein the gas side heat pipe is provided with a plurality of fins along a direction perpendicular to the gas running direction, the plurality of fins are provided on the body of the gas side heat pipe.
In yet another embodiment, the fins are spaced apart on different sidewalls of the body of the gas-side heat pipe to cause the gas to flow in a non-linear manner in the gas-side heat pipe.
In yet another embodiment, wherein the liquid side heat pipe is provided with a plurality of baffles in a direction perpendicular to the steam running direction, the plurality of baffles are provided on the body of the liquid side heat pipe.
In yet another embodiment, wherein the liquid side inlet is connected to a water supply, the water supply comprises at least one water pump.
In a further embodiment, the gas side inlet is connected with the lower part of the furnace body of the waste heat boiler through a circulating fan
According to a further aspect of the present utility model there is also provided a waste heat boiler, wherein the waste heat boiler comprises a boiler body and a waste heat exchange device as set forth above.
According to still another aspect of the present utility model, there is also provided a recovery method of sintering waste heat, wherein the recovery method is realized by using a waste heat boiler as set forth above, comprising:
pressurizing return air after heat exchange of the waste heat boiler by a circulating fan, entering a gas side cavity of the heat exchange device through a gas side inlet of the heat exchange device, and performing heat convection with a gas side heat pipe of the heat exchange device;
the heat exchange device air side heat pipe transfers the obtained heat to the heat exchange device liquid side heat pipe, wherein the return air after convection heat exchange returns to the sintering circular cooler through the heat exchange device air side outlet;
the normal temperature water supply enters the liquid side cavity of the heat exchange device through the liquid side inlet of the heat exchange device under the pressure of the water pump, performs convection heat exchange with the liquid side heat pipe of the heat exchange device, absorbs heat and heats up to become saturated steam, and then enters the collection tank and then enters the deaerator of the waste heat boiler.
By the waste heat exchange device, the waste heat boiler using the waste heat exchange device and the waste heat exchange method using the waste heat boiler, the return air waste heat of the sintering waste heat boiler can be effectively recycled deeply. By adopting the device and the method, the return air waste heat of the waste heat boiler can be deeply recovered, the water supply quality can be effectively improved, and the steam yield can be improved. The method has important effects on promoting energy conservation and emission reduction of iron and steel enterprises, and has good popularization prospect.
Drawings
For a better understanding of the present application, reference may be made to the embodiments illustrated in the following drawings. The components in the figures are not necessarily to scale and related elements may be omitted or the proportions may have been exaggerated in some cases in order to emphasize and clearly illustrate the novel features described herein. In addition, the system components may be arranged differently, as is known in the art. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views.
FIG. 1 is a schematic view of a waste heat exchange device according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a construction of a heat recovery boiler using a heat recovery device according to an embodiment of the present utility model;
fig. 3 is a flow chart of a waste heat exchange method of an embodiment of the present utility model.
Detailed Description
Embodiments of the present disclosure are described below. However, it is to be understood that the disclosed embodiments are merely examples and that other embodiments may take various alternative forms. The figures are not necessarily to scale; some functions may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present application. As will be appreciated by one of ordinary skill in the art, the various features illustrated and described with reference to any one of the figures may be combined with features illustrated in one or more other figures to produce embodiments that are not explicitly illustrated or described. The combination of features shown provides representative embodiments for typical applications. However, various combinations and modifications of the features consistent with the teachings of the present disclosure may be desired for certain specific applications or implementations.
As mentioned in the background art, the inventor of the present utility model has realized that there may be further room for improvement in the manner of recovering the residual heat of the sinter cooling air of the conventional flue gas waste heat boiler employed in the prior art, as shown in the schematic structural view of the waste heat exchange device of fig. 1, which shows the improved waste heat exchange device of the present utility model, having a liquid side heat pipe 7 located above and a gas side heat pipe 4 located below the liquid side heat pipe 7, wherein the liquid side heat pipe has a liquid side inlet 6 and a liquid side outlet connected to a collection tank 9. The liquid side outlet is connected with the collecting tank 9 through a pipeline and is controlled to be opened and closed through a valve body. The air side heat pipe 4 is disposed below the liquid side heat pipe 7 and is disposed in contact with the surface of the subject portion of the liquid side heat pipe 7, i.e., the surfaces of the two are bonded together, and the connection between the two can be accomplished in various known manners, such as by fixing brackets, fasteners, or adhesives. In one embodiment, the contact surfaces of the two are provided with or filled with a thermally conductive dielectric material to achieve more efficient thermal conduction therebetween. The air side heat pipe 4 has an air side inlet 1 and an air side outlet 2. In the embodiment of the utility model, the waste heat exchange device is inclined by gravity, as shown in fig. 1, and in a use state, the air side heat pipe 4 and the liquid side heat pipe 7 of the waste heat exchange device are both arranged obliquely relative to the horizontal plane at an angle θ.
With continued reference to fig. 1, in which a plurality of fins 5 are disposed in the air-side cavity 3 of the air-side heat pipe 4 in a direction perpendicular to the direction of gas operation, the plurality of fins 5 are disposed in the air-side cavity 3 on the main body of the air-side heat pipe 4, in one embodiment of the present utility model, the fins 5 are disposed at uniform intervals from each other, so that the high-temperature gas is disturbed by the fins 5 during the flow process to enhance the return air disturbance to the high-temperature gas, and the residence time of the high-temperature gas in the air-side cavity 3 is also increased to enhance the heat exchange effect with the liquid-side heat pipe 7. It will be appreciated that in another embodiment, the fins 5 may also be arranged to be staggered in a zigzag manner on different side walls of the air side cavity 3 of the air side heat pipe 4, so that the movement direction of the high temperature air in the air side heat pipe 4 is more changeable and complex, and a better heat exchange effect is achieved.
Still referring to fig. 1, wherein the liquid side heat pipe 7 has a plurality of baffles disposed along the width direction of the liquid side cavity 8 of the liquid side heat pipe 7, the plurality of baffles realize residence time of vapor in the liquid side cavity 8 after liquid vaporization on the one hand in order to enhance heat exchange effect and delay backflow phenomenon after vapor liquefaction on the other hand in the liquid side cavity 8.
In addition, through the inclined arrangement mode of the waste heat exchange device shown in fig. 1, the heated side medium, namely water and water vapor in one embodiment of the utility model, can be forced to form inclined flow along the heat pipe, compared with the conventional gravity type heat pipe, in the novel liquid side heat pipe, the temperature of hot water is gradually increased along the height direction in the heating process, the heat exchange temperature difference between gas and liquid can be effectively reduced, the heating amplitude of the hot water is obviously expanded, and the steam-water output temperature of the heated side is greatly improved.
Referring to the waste heat boiler using the waste heat exchange device of the utility model as shown in fig. 2, the waste heat boiler comprises a vertically arranged boiler body, the bottom of the boiler body is provided with a flue gas inlet, the upper end of the boiler body comprises a flue gas outlet, and a built-in economizer, a heat exchanger, an evaporator and a superheater are sequentially arranged from the flue gas inlet upwards. Wherein the heat exchanger, the evaporator and the superheater are connected with the steam drum 6. The deaerator is connected to a collection tank 9 at the liquid side outlet of the liquid side heat pipe 7. The top of the furnace body is connected with a gravity dust remover to remove dust and purify the flue gas. A circulating fan is arranged at the bottom of the furnace body and is connected with the air side inlet 1 of the air side heat pipe 4, so that high-temperature flue gas is conveyed into the air side heat pipe 4. The water pump 10 delivers water or heat exchange medium to the liquid side inlet 6 of the liquid side heat pipe 7 via the pipe 11, it is understood that the number of water pumps 10 may be set according to specific needs, and in this embodiment, the number of water pumps 10 is 2.
With continued reference to fig. 3, in the process of using the waste heat boiler shown in fig. 2, waste heat needs to be recovered, and the specific recovery steps are shown in a flow chart 300 in fig. 3, the recovery process starts at a block 305, then at a block 310, return air after the waste heat boiler is subjected to heat exchange is pressurized by a circulating fan, enters the air side cavity 3 of the heat exchange device through the air side inlet 1 of the heat exchange device, and exchanges heat with the air side heat pipe 4 of the heat exchange device in a convection manner; next at block 315, the heat exchanger device air side heat pipe 4 transfers the obtained heat to the heat exchanger device liquid side heat pipe 7, wherein the convected return air returns to the sintering circular cooler through the heat exchanger device air side outlet; the flow continues to block 320 where the normal temperature water enters the liquid side cavity of the heat exchange device through the liquid side inlet of the heat exchange device under the pressure of the water pump, performs convective heat exchange with the liquid side heat pipe of the heat exchange device, absorbs heat, heats up to become saturated steam, enters the collection tank, and then enters the deaerator of the waste heat boiler to perform deaeration operation.
The technical scheme of the present utility model will be described in the following specific examples, in example 1, if the air return rate of the sintering waste heat boiler is 250000Nm 3 And when the included angle theta between the gravity type inclined gas-liquid waste heat exchange device and the ground horizontal direction is 30 degrees, under the pressure of a water pump 10 for normal-temperature water supply, the water enters the liquid side cavity 8 of the liquid side heat pipe 7 of the heat exchange device through a water supply pipeline and the liquid side inlet 6 of the liquid side heat pipe 7, exchanges heat with return air entering the gas side cavity 3 of the gas side heat pipe 4 of the heat exchange device through the heat pipe, the return air temperature after heat exchange can be reduced to 50 ℃, and meanwhile, the normal-temperature water with the temperature of 25 ℃ at 129t/h can be heated to the saturated temperature to become saturated water, and the saturated water enters a deaerator of a sintering waste heat boiler through a collecting box and a water conveying pipeline.
In example 2, the air return rate of the sintering waste heat boiler was 400000Nm 3 And/h, the return air temperature is 160 ℃, the temperature of the supplied water is normal-temperature water at normal temperature of 25 ℃, and when the included angle theta between the gravity type inclined gas-liquid waste heat exchange device and the ground horizontal direction is 45 DEG, the water enters the liquid side cavity 8 of the liquid side heat pipe 7 of the heat exchange device through the water supply pipeline and the liquid side inlet 6 of the liquid side heat pipe 7 under the pressure of the water pump 10 for normal-temperature water supply and enters the heat exchange deviceThe return air of the air side cavity 3 of the air side heat pipe 4 is subjected to heat exchange through the heat pipe, the return air temperature after heat exchange can be reduced to 65 ℃, and meanwhile, the normal-temperature water with 189t/h temperature of 25 ℃ can be heated to the saturation temperature to become saturated water, and the saturated water enters the deaerator of the sintering waste heat boiler through the collecting box and the water conveying pipeline.
In this application, the use of the anti-connotation term is intended to include the connotation term. The use of definite or indefinite articles is not intended to indicate cardinality. In particular, references to "the" object or "a" and "an" object are intended to mean a possible one of a plurality of such objects. Furthermore, rather than a mutually exclusive approach, the conjunction "or" may be used to convey a simultaneous feature. In other words, the conjunctive word "or" is to be understood as comprising "and/or". The term "comprising" is inclusive and has the same scope as "comprising".
The above examples are possible examples of implementations of the present application and are given only for the sake of clarity of understanding of the principles of the present application to those skilled in the art. Those skilled in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present application, including the claims, is limited to such examples; the technical features of the above embodiments or in different embodiments may also be combined with each other and many other variations of the different aspects of the embodiments of the present application as described above are produced under the general concept of the present application, which are not provided in the detailed description for the sake of brevity. Accordingly, any omissions, modifications, equivalents, improvements, and the like, which are within the spirit and principles of the embodiments of the present application, are intended to be included within the scope of the protection claimed herein.
Claims (10)
1. A waste heat exchange device, comprising:
a gas side heat pipe having a gas side inlet and a gas side outlet;
a liquid side heat pipe having a liquid side inlet and a liquid side outlet;
the air side heat pipe and the surface of the main body part of the liquid side heat pipe are arranged in contact with each other;
in the use state, the heat exchange device is arranged obliquely relative to the horizontal plane.
2. The waste heat exchange device of claim 1, wherein the gas side inlet is disposed at a top of the gas side heat pipe and the gas side outlet is disposed at a bottom of the gas side heat pipe.
3. The waste heat exchange device of claim 1, wherein the liquid side inlet is disposed at a bottom of the liquid side heat pipe and the liquid side outlet is disposed at a top of the liquid side heat pipe.
4. The waste heat exchange device of claim 3, wherein a collection tank is arranged on the liquid side outlet, and the collection tank is communicated with a deaerator of the waste heat boiler.
5. The heat transfer device of claim 2, wherein the gas side heat pipe is provided with a plurality of fins along a direction perpendicular to a gas running direction, the plurality of fins being provided on a main body of the gas side heat pipe.
6. The heat transfer device of claim 5, wherein the fins are spaced apart on different sidewalls of the body of the gas side heat pipe to allow gas to flow in the gas side heat pipe in a non-linear manner.
7. The heat recovery device of claim 3, wherein the liquid side heat pipe is provided with a plurality of baffles along a direction perpendicular to a steam running direction, the plurality of baffles being provided on a main body of the liquid side heat pipe.
8. The waste heat exchange device of claim 3, wherein the liquid side inlet is connected to a water supply device comprising at least one water pump.
9. The waste heat exchange device according to claim 2, wherein the gas side inlet is connected to a lower portion of a furnace body of the waste heat boiler through a circulating fan.
10. A waste heat boiler, characterized in that it comprises a boiler body and a waste heat exchange device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322293759.0U CN220669484U (en) | 2023-08-25 | 2023-08-25 | Waste heat exchange device and waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322293759.0U CN220669484U (en) | 2023-08-25 | 2023-08-25 | Waste heat exchange device and waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220669484U true CN220669484U (en) | 2024-03-26 |
Family
ID=90334379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322293759.0U Active CN220669484U (en) | 2023-08-25 | 2023-08-25 | Waste heat exchange device and waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220669484U (en) |
-
2023
- 2023-08-25 CN CN202322293759.0U patent/CN220669484U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201050944Y (en) | Electric furnace flue gas waste heat recovery device | |
| CN103062754B (en) | Power station machine furnace integrated cold end comprehensive optimization system | |
| CN102454980B (en) | Method for recycling flue gas waste heat of thermal power plant boiler | |
| CN107941028B (en) | Sintering cooling waste gas waste heat power generation system with organic Rankine cycle | |
| CN116906921A (en) | Waste heat exchange device, waste heat boiler and method for recovering sintering waste heat | |
| CN205118991U (en) | Self -supporting dry coke quenching exhaust -heat boiler | |
| CN101476015B (en) | AOD converter flue gas waste heat recovery device | |
| CN201148443Y (en) | AOD converter flue gas waste heat recovery device | |
| CN104457297B (en) | A kind of sintering waste heat recovery method and system | |
| CN205878964U (en) | Heat exchanger for waste heat recovery | |
| CN220669484U (en) | Waste heat exchange device and waste heat boiler | |
| CN105953600A (en) | Indirect cooling system based on heat pipe and used for indirect air cooling unit | |
| CN101261008A (en) | Liquid phase intermediate medium heat exchanging type heat exchanger | |
| CN205402641U (en) | Become residual heat from flue gas boiler of space unsteady flow field | |
| CN204730683U (en) | New and effective sintering mine sensible heat retracting device | |
| CN204404812U (en) | A kind of sintering waste heat recovery system | |
| CN1920387A (en) | Low-pressure coal saver for boiler | |
| CN105157011A (en) | Device and method for reducing backpressure of steam turbine by using waste heat of exhaust smoke of boiler | |
| CN208898929U (en) | A kind of blast-furnace hot-air kiln gas/coal gas/air double-preheating device | |
| CN208349328U (en) | A kind of dedusting of coal-fired hot-water boiler flue gas disappears white waste heat depth recovery system | |
| CN102353143A (en) | Compound water circulation system in corner tube-type hot-water boiler | |
| CN101644477B (en) | Separate combination type air heat regenerator | |
| CN205782834U (en) | A kind of residual heat from boiler fume utilizes combining heating system | |
| CN202229411U (en) | Combined water circulation device for corner tube hot water boiler | |
| CN205026643U (en) | Utilize boiler to discharge fume waste heat and reduce device of steam turbine backpressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |