CN212777272U - High-temperature flue gas heat recovery device - Google Patents
High-temperature flue gas heat recovery device Download PDFInfo
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- CN212777272U CN212777272U CN202021524694.6U CN202021524694U CN212777272U CN 212777272 U CN212777272 U CN 212777272U CN 202021524694 U CN202021524694 U CN 202021524694U CN 212777272 U CN212777272 U CN 212777272U
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Abstract
The utility model discloses a high temperature flue gas heat recovery unit, including first heat exchanger, steam pocket, second heat exchanger. The first heat exchanger comprises a first shell, a water-cooled wall, a first air inlet, a first air outlet, a first water inlet and a first water outlet. A water cooled wall in the first shell defines a first cavity and a second cavity which are connected; the first air inlet is communicated with the first cavity, and the first air outlet is communicated with the second cavity; the steam drum comprises a second water outlet, a second water inlet and a first steam outlet, and the second water outlet is communicated with the first water inlet; the second water inlet is communicated with the first water outlet; the second heat exchanger comprises a second shell, a heat pipe bundle, a second air inlet, a second air outlet, a first steam inlet and a second steam outlet; two ends of the heat pipe bundle in the second shell are respectively communicated with the second air inlet and the second air outlet; the second air inlet is communicated with the first air outlet; the first steam outlet is in communication with the first steam inlet. The utility model discloses the waste heat that enables the high temperature flue gas obtains abundant recycle.
Description
Technical Field
The utility model belongs to the technical field of the high temperature flue gas processing technique and specifically relates to a high temperature flue gas heat recovery unit is related to.
Background
Coal gasification is an important way for clean and efficient utilization of coal. During the coal gasification process, a large amount of carbon-containing fly ash can be generated, the particle size of the carbon-containing fly ash is small, and the average particle size is only 50 micrometers; the carbon content is more than 40 percent, and the carbon content is high; the fly ash containing carbon is easy to self-ignite and has large storage difficulty; by adopting the carbon-containing fly ash high-temperature melting treatment system, the carbon-containing fly ash can be burnt to melt the carbon-containing fly ash to form slag when the temperature of the carbon-containing fly ash reaches above the ash melting point, the carbon content of the slag is almost zero, and the problem of high difficulty in treating the carbon-containing fly ash is solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a high temperature flue gas heat recovery device, enable the waste heat of high temperature flue gas to obtain abundant recycle.
According to the utility model discloses high temperature flue gas heat recovery device, include:
the first heat exchanger comprises a first shell, a water-cooled wall, a first air inlet, a first air outlet, a first water inlet and a first water outlet, wherein the water-cooled wall is positioned in the first shell, the water-cooled wall defines a first cavity and a second cavity which are connected, the first air inlet is communicated with the first cavity, and the first air outlet is communicated with the second cavity; the water-cooled wall comprises a plurality of first water-cooled tubes which are communicated with the first water inlet and the first water outlet together;
the steam drum comprises a second water outlet, a second water inlet and a first steam outlet, and the second water outlet is communicated with the first water inlet; the second water inlet is communicated with the first water outlet;
a second heat exchanger comprising a second housing, a heat pipe bundle, a second air inlet, a second air outlet, a first steam inlet, and a second steam outlet; the heat pipe bundle is arranged in the second shell, two ends of the heat pipe bundle are respectively communicated with the second air inlet and the second air outlet, and the second air inlet is communicated with the first air outlet; the first steam outlet is in communication with the first steam inlet.
According to the utility model discloses high temperature flue gas heat recovery device, high temperature flue gas heat's recovery process as follows: high-temperature flue gas generated by the carbon-containing fly ash high-temperature melting treatment system enters the first cavity through the first air inlet and performs primary heat exchange with circulating water in the plurality of first water-cooled tubes of the water-cooled wall, the flue gas after the primary heat exchange enters the second cavity and further exchanges heat with the circulating water in the plurality of first water-cooled tubes of the water-cooled wall, and the flue gas after the further heat exchange is discharged out of the first heat exchanger through the first air outlet and then enters the heat pipe bundle through the second air inlet in the second heat exchanger. Circulating water in a plurality of first water-cooling pipes of the water-cooling wall after heat exchange with the flue gas is discharged out of the first heat exchanger through the first water outlet, then enters the steam drum from the second water inlet, gas-liquid separation is carried out in the steam drum, and generated steam (saturated steam) is discharged from the first steam outlet of the steam drum and then enters the second shell through the first steam inlet of the second heat exchanger. In the second heat exchanger, flue gas in the heat pipe bundle and steam in the second shell reversely flow to exchange heat, so that the flue gas is further cooled, superheated steam is generated in the second shell, the superheated steam is discharged from the second steam outlet and can be used for power generation or heating, and the flue gas after being further cooled is discharged through the second air outlet. In conclusion, this high temperature flue gas heat reclamation device can carry out abundant processing to the high temperature flue gas that carbonaceous flying dust high temperature melting processing system produced for the waste heat of high temperature flue gas obtains abundant recycle, has improved the thermal efficiency of carbonaceous flying dust high temperature melting processing system.
According to one embodiment of the present invention, the water-cooled wall extends vertically and includes a first water-cooled wall and a second water-cooled wall; the first water-cooled wall is annular, the first water-cooled wall defines the first cavity, and the first air inlet is positioned at the upper end of the first cavity; the second water-cooling wall is annular, the second water-cooling wall is annularly arranged outside the periphery of the first water-cooling wall, the second water-cooling wall and the first water-cooling wall define an annular space between the second cavity, the lower end of the first cavity is communicated with the lower end of the second cavity, and the upper end of the second cavity is closed and is only communicated with the first air outlet.
According to the utility model discloses further embodiment, it is a plurality of first water-cooled tube all is vertical extension.
According to the utility model discloses further embodiment still includes the water-cooling screen, the water-cooling screen sets up in the first chamber, the water-cooling screen including common with first water inlet intercommunication and common with a plurality of second water-cooling pipes of first delivery port intercommunication.
According to the utility model discloses still further embodiment, it is a plurality of the second water-cooled tube all is vertical extension.
According to the utility model discloses still further embodiment, the wall body of first air inlet is supported on the first casing, the upper end and the lower extreme of second water-cooling wall are supported respectively correspondingly the inner wall of first air inlet with on the inner wall of first casing, the upper end of first water-cooling wall with the upper end of water-cooling screen is supported the upper end department of second water-cooling wall.
According to the utility model discloses an embodiment, the lower extreme of first casing is equipped with the sedimentation tank.
According to an embodiment of the present invention, the second air inlet is located at an upper end of the second housing, and the second air outlet is located at a lower end of the second housing; the first steam inlet is located at the lower end of one side of the second shell, the second steam outlet is located at the upper end of the other side of the second shell, and the one side of the second shell and the other side of the second shell are opposite to each other.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a high-temperature flue gas heat recovery device according to an embodiment of the present invention.
Reference numerals:
high-temperature flue gas heat recovery device 1000
First heat exchanger 1 first housing 11
A first air inlet 13, a first air outlet 14, a first water inlet 15 and a first water outlet 16
A second water outlet 21, a second water inlet 22 and a first steam outlet 23 of the steam drum 2
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
The high temperature flue gas heat recovery device 1000 according to the embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, according to the embodiment of the present invention, a high temperature flue gas heat recovery device 1000 includes a first heat exchanger 1, a steam drum 2, and a second heat exchanger 3, where the first heat exchanger 1 includes a first housing 11, a water wall 12, a first air inlet 13, a first air outlet 14, a first water inlet 15, and a first water outlet 16, the water wall 12 is located in the first housing 11, the water wall 12 defines a first cavity 17 and a second cavity 18 that are connected, the first air inlet 13 is communicated with the first cavity 17, and the first air outlet 14 is communicated with the second cavity 18; the water wall 12 comprises a plurality of first water cooling tubes which are communicated with a first water inlet 15 and a first water outlet 16 together; the steam drum 2 comprises a second water outlet 21, a second water inlet 22 and a first steam outlet 23, and the second water outlet 21 is communicated with the first water inlet 15; the second water inlet 22 is communicated with the first water outlet 16; the second heat exchanger 3 includes a second housing 31, a heat pipe bundle 32, a second air inlet 33, a second air outlet 34, a first steam inlet 35, and a second steam outlet 36; the heat pipe bundle 32 is arranged in the second shell 31, two ends of the heat pipe bundle 32 are respectively communicated with the second air inlet 33 and the second air outlet 34, and the second air inlet 33 is communicated with the first air outlet 14; the first steam outlet 23 communicates with the first steam inlet 35.
According to the utility model discloses high temperature flue gas heat recovery device 1000, the thermal recovery process of high temperature flue gas is as follows: high-temperature flue gas (1300-. Circulating water in the plurality of first water-cooling pipes of the water-cooling wall 12 after heat exchange with the flue gas is discharged out of the first heat exchanger 1 through the first water outlet 16, then enters the steam drum 2 from the second water inlet 22, gas-liquid separation is performed in the steam drum 2, and generated steam (saturated steam) is discharged from the first steam outlet 23 of the steam drum 2, and then enters the second shell 31 through the first steam inlet 35 of the second heat exchanger 3. In the second heat exchanger 3, the flue gas in the heat pipe bundle 32 and the steam in the second shell 31 flow in the opposite direction to exchange heat, so that the flue gas is further cooled, superheated steam is generated in the second shell 31, the superheated steam is discharged from the second steam outlet 36 and can be used for power generation or heating, and the flue gas after further cooling is discharged through the second air outlet 34. In conclusion, the high-temperature flue gas heat recovery device 1000 can fully treat the high-temperature flue gas generated by the carbon-containing fly ash high-temperature melting treatment system, so that the waste heat of the high-temperature flue gas is fully recycled, and the heat efficiency of the carbon-containing fly ash high-temperature melting treatment system is improved.
According to an embodiment of the present invention, the waterwall 12 is vertically extended and includes a first waterwall 121 and a second waterwall 122; the first water-cooled wall 121 is annular, the first water-cooled wall 121 defines a first cavity 17, and the first air inlet 13 is positioned at the upper end of the first cavity 17; the second water-cooling wall 122 is annular, the second water-cooling wall 122 is annularly arranged outside the periphery of the first water-cooling wall 121, a second cavity 18 of an annular space is defined between the second water-cooling wall 122 and the first water-cooling wall 121, the lower end of the first cavity 17 is communicated with the lower end of the second cavity 18, and the upper end of the second cavity 18 is closed and is only communicated with the first air outlet 14. It is understood that waterwalls 12 extend vertically and include a first waterwall 121 and a second waterwall 122; the first water-cooled wall 121 is annular, the first water-cooled wall 121 defines a first cavity 17, and the first air inlet 13 is positioned at the upper end of the first cavity 17; after the high-temperature flue gas enters the first cavity 17 from the first air inlet 13, the high-temperature flue gas can be fully contacted with the first water-cooled wall 121, so that the high-temperature flue gas and circulating water in the first water-cooled wall 121 can be subjected to full primary heat exchange. The second water-cooled wall 122 is annular, the second water-cooled wall 122 is annularly arranged outside the periphery of the first water-cooled wall 121, a second cavity 18 of an annular space is defined between the second water-cooled wall 122 and the first water-cooled wall 121, the lower end of the first cavity 17 is communicated with the lower end of the second cavity 18, and the upper end of the second cavity 18 is closed and is only communicated with the first air outlet 14; the flue gas after primary heat exchange with the first water-cooled wall 121 can enter the second cavity 18 from the lower end of the second cavity 18 through the lower end of the first cavity 17, and the flue gas entering the second cavity 18 can be fully contacted with the first water-cooled wall 121 and the second water-cooled wall 122, so that the flue gas can be fully subjected to further heat exchange with circulating water in the first water-cooled wall 121 and the second water-cooled wall 122; and the sealing performance is good, the leakage of the flue gas after further heat exchange is avoided, and the flue gas can only be discharged through the first gas outlet 14.
According to the utility model discloses further embodiment, a plurality of first water-cooling pipes all are vertical extension. Therefore, the first water-cooling wall 121 and the second water-cooling wall 122 are simple in structure, convenient to process and capable of saving process cost.
According to the utility model discloses further embodiment still includes water-cooling screen 123, and water-cooling screen 123 sets up in first chamber 17, and water-cooling screen 123 includes a plurality of second water-cooling pipes that communicate with first water inlet 15 jointly and communicate with first delivery port 16 jointly. It can be understood that, through setting up water-cooling screen 123 in first chamber 17, water-cooling screen 123 includes a plurality of second water-cooling pipes that communicate with first water inlet 15 jointly and communicate with first delivery port 16 jointly, has increased heat transfer area for the high temperature flue gas in first chamber 17 also can carry out the heat transfer with the circulating water among the second water-cooling pipe of water-cooling screen 123 fully, thereby has improved heat recovery efficiency.
According to the utility model discloses further embodiment again, a plurality of second water-cooled tubes all are vertical extension. Therefore, the water-cooling screen 123 is simple in structure, convenient to process and capable of saving the process cost.
According to the utility model discloses still further embodiment, the wall body of first air inlet 13 is supported on first casing 11, and the upper end and the lower extreme of second water-cooling wall 122 are supported respectively correspondingly on the inner wall of first air inlet 13 and the inner wall of first casing 11, and the upper end of first water-cooling wall 121 and the upper end of water-cooling screen 123 support in the upper end department of second water-cooling wall 122. It can be understood that the first shell 11 provides an installation space for the first air inlet 13, the first water-cooled wall 121, the second water-cooled wall 122 and the water-cooled screen 123, and plays a role in protection; the wall body of the first air inlet 13 is supported on the first shell 11, the upper end and the lower end of the second water-cooling wall 122 are respectively supported on the inner wall of the first air inlet 13 and the inner wall of the first shell 11, and the upper end of the first water-cooling wall 121 and the upper end of the water-cooling screen 123 are supported at the upper end of the second water-cooling wall 122; make first heat exchanger 1's leakproofness good, difficult emergence flue gas leaks, and the flue gas can fully contact with the surface of water-cooling wall 12 to carry out the heat transfer with the circulating water, the heat transfer is effectual, and heat recovery efficiency is high.
According to an embodiment of the present invention, the lower end of the first housing 11 is provided with a sedimentation basin 19. It will be appreciated that the sedimentation tank 19 serves to collect small amounts of unburned carbon-containing fly ash entrained in the hot flue gas and facilitates periodic discharge of the deposited unburned carbon-containing fly ash.
According to an embodiment of the present invention, the second air inlet 33 is located at the upper end of the second housing 31, and the second air outlet 34 is located at the lower end of the second housing 31; the first steam inlet 35 is located at a lower end of one side of the second casing 31, the second steam outlet 36 is located at an upper end of the other side of the second casing 31, and the one side of the second casing 31 and the other side of the second casing 31 are opposite to each other. It can be understood that, with this arrangement, in the second heat exchanger 3, the flue gas entering the heat pipe bundle 32 through the second air inlet 33 and the steam entering the second shell 31 through the first steam inlet 35 generate reverse flow, so as to perform better heat exchange and improve the heat recovery efficiency; thereby further cooling the flue gas and generating superheated steam in the second casing 31, the superheated steam being discharged from the second steam outlet 36 and being used for power generation or heating, the further cooled flue gas being discharged through the second air outlet 34.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present 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, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The utility model provides a high temperature flue gas heat reclamation device which characterized in that includes:
the first heat exchanger comprises a first shell, a water-cooled wall, a first air inlet, a first air outlet, a first water inlet and a first water outlet, wherein the water-cooled wall is positioned in the first shell, the water-cooled wall defines a first cavity and a second cavity which are connected, the first air inlet is communicated with the first cavity, and the first air outlet is communicated with the second cavity; the water-cooled wall comprises a plurality of first water-cooled tubes which are communicated with the first water inlet and the first water outlet together;
the steam drum comprises a second water outlet, a second water inlet and a first steam outlet, and the second water outlet is communicated with the first water inlet; the second water inlet is communicated with the first water outlet;
a second heat exchanger comprising a second housing, a heat pipe bundle, a second air inlet, a second air outlet, a first steam inlet, and a second steam outlet; the heat pipe bundle is arranged in the second shell, two ends of the heat pipe bundle are respectively communicated with the second air inlet and the second air outlet, and the second air inlet is communicated with the first air outlet; the first steam outlet is in communication with the first steam inlet.
2. The high temperature flue gas heat recovery device of claim 1, wherein the waterwalls extend vertically and comprise a first waterwall and a second waterwall; the first water-cooled wall is annular, the first water-cooled wall defines the first cavity, and the first air inlet is positioned at the upper end of the first cavity; the second water-cooling wall is annular, the second water-cooling wall is annularly arranged outside the periphery of the first water-cooling wall, the second water-cooling wall and the first water-cooling wall define an annular space between the second cavity, the lower end of the first cavity is communicated with the lower end of the second cavity, and the upper end of the second cavity is closed and is only communicated with the first air outlet.
3. The high temperature flue gas heat recovery device of claim 2, wherein the plurality of first water-cooled tubes each extend vertically.
4. The high temperature flue gas heat recovery device of claim 2, further comprising a water screen disposed in the first chamber, the water screen including a plurality of second water-cooled tubes in common communication with the first water inlet and in common communication with the first water outlet.
5. The high temperature flue gas heat recovery device of claim 4, wherein the plurality of second water cooling tubes extend vertically.
6. The high temperature flue gas heat recovery device of claim 4, wherein the wall body of the first inlet port is supported on the first shell, the upper end and the lower end of the second water-cooled wall are respectively supported on the inner wall of the first inlet port and the inner wall of the first shell, and the upper end of the first water-cooled wall and the upper end of the water-cooled screen are supported on the upper end of the second water-cooled wall.
7. The high-temperature flue gas heat recovery device according to claim 1, wherein a sedimentation tank is arranged at the lower end of the first shell.
8. The high-temperature flue gas heat recovery device according to claim 1, wherein the second gas inlet is located at the upper end of the second casing, and the second gas outlet is located at the lower end of the second casing; the first steam inlet is located at the lower end of one side of the second shell, the second steam outlet is located at the upper end of the other side of the second shell, and the one side of the second shell and the other side of the second shell are opposite to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021524694.6U CN212777272U (en) | 2020-07-28 | 2020-07-28 | High-temperature flue gas heat recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021524694.6U CN212777272U (en) | 2020-07-28 | 2020-07-28 | High-temperature flue gas heat recovery device |
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| CN212777272U true CN212777272U (en) | 2021-03-23 |
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| CN202021524694.6U Active CN212777272U (en) | 2020-07-28 | 2020-07-28 | High-temperature flue gas heat recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608326A (en) * | 2022-03-28 | 2022-06-10 | 北京一亚高科能源科技有限公司 | Small fly ash melting device |
-
2020
- 2020-07-28 CN CN202021524694.6U patent/CN212777272U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608326A (en) * | 2022-03-28 | 2022-06-10 | 北京一亚高科能源科技有限公司 | Small fly ash melting device |
| CN114608326B (en) * | 2022-03-28 | 2024-03-26 | 北京衡燃科技有限公司 | Small-sized fly ash melting device |
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