CN216245703U - Sectional combined variable fin heat exchanger for ascending pipe of coke oven - Google Patents
Sectional combined variable fin heat exchanger for ascending pipe of coke oven Download PDFInfo
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- CN216245703U CN216245703U CN202122786945.9U CN202122786945U CN216245703U CN 216245703 U CN216245703 U CN 216245703U CN 202122786945 U CN202122786945 U CN 202122786945U CN 216245703 U CN216245703 U CN 216245703U
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Abstract
The utility model relates to a sectional combination variable fin heat exchanger for a coke oven ascending tube, belonging to the technical field of coke oven ascending tube waste heat recovery. The technical scheme is as follows: the side of the inner wall of the ascending pipe is coiled with an independently circulating medium-temperature section coil pipe (16) and a high-temperature section coil pipe (17), and the heat-taking section in the ascending pipe is correspondingly divided into a medium-temperature area and a high-temperature area; the medium-temperature section coil (16) of the medium-temperature area is positioned at the upper part of the heat taking section, the high-temperature section coil (17) of the high-temperature area is positioned at the lower part of the heat taking section, the bottom of the heat taking section is provided with a high-temperature heat taking section inlet (9), the high-temperature heat taking section outlet at the middle part of the heat taking section is simultaneously used as a medium-temperature heat taking section inlet, and the top of the heat taking section is provided with a medium-temperature heat taking section outlet (1). The utility model has the beneficial effects that: according to different waste heat utilization purposes, multiple groups of ascending pipe heat exchanger systems can be selectively combined, and low-pressure saturated steam, superheated steam and steam with fixed pressure and temperature values in a certain range can be produced; the layout mode of water and steam in the middle is adopted, so that the on-site operation and the heat extraction are convenient and uniformly distributed, and the coking is reduced.
Description
Technical Field
The utility model relates to a sectional combination variable fin heat exchanger for a coke oven ascending tube, belonging to the technical field of coke oven ascending tube waste heat recovery.
Background
The waste heat recovery of the coke oven gas riser is a required means for energy conservation, consumption reduction, low carbon and environmental protection, generally, a heat taking section of the riser adopts a jacket outer coil type recovery device to recycle heat energy, has the characteristics of no influence on the circulation of raw coke gas, stable heat taking amount and the like, can better control the coking of the inner wall of the riser, and is convenient to clean even after the coking appears in the riser. However, the jacket outer coil type recovery device widely used in the prior art is obviously insufficient in capability of preparing superheated steam because selective combination cannot be carried out according to different waste heat utilization purposes. In addition, the field operation is inconvenient, the heat is not uniformly distributed, and the coking cannot be reduced to the maximum extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sectional combination variable fin heat exchanger for a coke oven ascending pipe, a plurality of groups of ascending pipe heat exchanger systems can be selectively combined according to different waste heat utilization purposes, low-pressure saturated steam, superheated steam and fixed-value steam with pressure and temperature in a certain range can be produced, a layout mode of middle water inlet and outlet and steam outlet is adopted, the field operation and the uniform distribution of heat extraction are facilitated, the coking is reduced, and the problems in the background technology are solved.
The technical scheme of the utility model is as follows:
a sectional combined variable fin heat exchanger of a coke oven ascending pipe is characterized in that a medium-temperature section coil pipe and a high-temperature section coil pipe which circulate independently are coiled back on the inner wall side of the ascending pipe, and a heat-taking section in the ascending pipe is correspondingly divided into a medium-temperature area and a high-temperature area; the medium-temperature section coil of the medium-temperature area is positioned at the upper part of the heat taking section, the high-temperature section coil of the high-temperature area is positioned at the lower part of the heat taking section, the bottom of the heat taking section is a high-temperature heat taking section inlet, the high-temperature heat taking section outlet at the middle part of the heat taking section is simultaneously used as a medium-temperature heat taking section inlet, and the top of the heat taking section is a medium-temperature heat taking section outlet.
The middle-temperature section water inlet and the middle-temperature section water outlet of the middle-temperature section coil pipe are positioned at the bottom of the middle-temperature area, and the high-temperature section steam outlet and the high-temperature section steam inlet of the high-temperature section coil pipe are positioned at the top of the high-temperature area; namely: the medium-temperature section water inlet and the medium-temperature section water outlet of the medium-temperature section coil pipe, and the high-temperature section steam outlet and the high-temperature section steam inlet of the high-temperature section coil pipe are all positioned in the middle of the heat taking section.
A plurality of fins which are vertically arranged are arranged on the inner walls of the medium-temperature section coil pipe and the high-temperature section coil pipe along the circumferential direction; the fins of the medium temperature zone are quantitative fins, namely the width of the fins is equal from top to bottom; the fins in the high-temperature area are variable fins, namely the widths of the fins are unequal from top to bottom.
The width of the variable fins is gradually increased from top to bottom, and the width of the tops of the variable fins is equal to that of the quantitative fins. The side view of the variable fin is a right trapezoid, and the side view of the quantitative fin is a rectangle.
And a heat insulation layer and a heat resistance filling layer are arranged around the middle temperature area of the heat taking section, and a heat resistance filling protective layer and a heat insulation protective layer are arranged around the high temperature area of the heat taking section to jointly form a heat insulation shell of the heat taking section.
A plurality of pipe seats are arranged on the circumference of the heat-insulating shell, and the medium-temperature section coil pipe and the high-temperature section coil pipe are arranged on the corresponding pipe seats respectively.
The outlet of the medium temperature heat-taking section is provided with an outlet flange, the inlet of the high temperature heat-taking section is provided with an inlet flange, and the heat-taking section is arranged in the ascending pipe of the coke oven through the outlet flange and the inlet flange.
The middle-temperature section coil pipe starts to return to the upper disc from the middle-temperature section water inlet, returns to the lower disc after passing through the middle-temperature section coil pipe connecting elbow at the outlet flange, and returns to the middle-temperature section water outlet; the high-temperature section coil pipe starts to return to a lower plate from a high-temperature section steam inlet, returns to an inlet flange through a high-temperature section coil pipe connecting elbow and then returns to an upper plate to a high-temperature section steam outlet.
The utility model divides the heat-taking section into a high-temperature area and a medium-temperature area, and respectively adopts independent circulating systems to take heat, so that the utility model is used for different utilization ways. In a high-temperature area, the heat transfer mode is mainly heat radiation, variable fins (the area of the fins is constantly changed) are adopted for heat extraction, the heat extraction area is reduced along the direction of reducing the temperature of the raw coke oven gas, and the purpose of preparing high-temperature steam is met. In the middle temperature section, the fin area is constant, and the low temperature saturated steam is prepared. The variable fins (area change) can enhance heat transfer and improve heat conduction efficiency.
The utility model has the beneficial effects that: according to different waste heat utilization purposes, multiple groups of ascending pipe heat exchanger systems can be selectively combined, and low-pressure saturated steam, superheated steam and steam with fixed pressure and temperature values in a certain range can be produced; the layout mode of water and steam in the middle is adopted, so that the on-site operation and the heat extraction are convenient and uniformly distributed, and the coking is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic illustration of a fin according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a fin according to an embodiment of the present invention;
in the figure: the heat insulation device comprises a medium temperature heat taking section outlet 1, an outlet flange 2, a heat insulation layer 3, a heat insulation filling layer 4, a medium temperature section water inlet 5, a medium temperature section water outlet 6, a high temperature section coil pipe connecting elbow 7, an inlet flange 8, a high temperature heat taking section inlet 9, a medium temperature section coil pipe connecting elbow 10, a high temperature section steam outlet 11, a high temperature section steam inlet 12, a quantitative fin 13, a variable fin 14, a pipe seat 15, a medium temperature section coil pipe 16, a high temperature section coil pipe 17, a heat insulation filling protection layer 18 and a heat insulation protection layer 19.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.
A sectional combined variable fin heat exchanger of a coke oven ascending pipe is characterized in that a medium-temperature section coil 16 and a high-temperature section coil 17 which circulate independently are coiled back on the inner wall side of the ascending pipe, and a heat-taking section in the ascending pipe is correspondingly divided into a medium-temperature area and a high-temperature area; the medium-temperature section coil 16 of the medium-temperature area is positioned at the upper part of the heat taking section, the high-temperature section coil 17 of the high-temperature area is positioned at the lower part of the heat taking section, the bottom of the heat taking section is a high-temperature heat taking section inlet 9, the middle high-temperature heat taking section outlet of the heat taking section is simultaneously used as a medium-temperature heat taking section inlet, and the top of the heat taking section is a medium-temperature heat taking section outlet 1.
The medium-temperature section water inlet 5 and the medium-temperature section water outlet 6 of the medium-temperature section coil pipe 16 are positioned at the bottom of the medium-temperature zone, and the high-temperature section steam outlet 11 and the high-temperature section steam inlet 12 of the high-temperature section coil pipe 17 are positioned at the top of the high-temperature zone; namely: the medium temperature section water inlet 5 and the medium temperature section water outlet 6 of the medium temperature section coil pipe 16, the high temperature section steam outlet 11 and the high temperature section steam inlet 12 of the high temperature section coil pipe 17 are all positioned in the middle of the heat taking section.
A plurality of vertically arranged fins are arranged on the inner walls of the medium-temperature section coil pipe 16 and the high-temperature section coil pipe 17 along the circumferential direction; the fins of the medium temperature zone are quantitative fins 13, namely the width of the fins is equal from top to bottom; the fins in the high-temperature area are variable fins 14, namely the widths of the fins are unequal from top to bottom.
The width of the variable fins 14 is gradually increased from top to bottom, and the width of the tops of the variable fins 14 is equal to the width of the quantitative fins 13. The side view of the variable fin 14 is a right trapezoid, and the side view of the quantitative fin 13 is a rectangle.
An insulating layer 3 and a heat-resistant filling layer 4 are arranged around the middle temperature area of the heat taking section, and a heat-resistant filling protective layer 18 and a heat-insulating protective layer 19 are arranged around the high temperature area of the heat taking section to jointly form a heat-insulating shell of the heat taking section.
The circumference of the heat-insulating shell is provided with a plurality of pipe seats 15, and the medium-temperature section coil pipe 16 and the high-temperature section coil pipe 17 are arranged on the corresponding pipe seats 15.
The outlet 1 of the medium temperature heat-taking section is provided with an outlet flange 2, the inlet 9 of the high temperature heat-taking section is provided with an inlet flange 8, and the heat-taking section is arranged in the ascending pipe of the coke oven through the outlet flange 2 and the inlet flange 8.
The middle-temperature section coil pipe 16 starts to return from the middle-temperature section water inlet 5 to the upper pan, returns to the lower pan after passing through the middle-temperature section coil pipe connecting elbow 10 at the outlet flange 2, and returns to the middle-temperature section water outlet 6; the high-temperature section coil 17 starts to return to the lower part from the high-temperature section steam inlet 12, returns to the inlet flange 8 through the high-temperature section coil connecting elbow 7 and then returns to the high-temperature section steam outlet 11.
In the embodiment, the high-temperature raw gas with the temperature of more than 750 ℃ enters from the inlet 9 of the high-temperature heat-taking section, passes through the inlet flange 8 and enters the high-temperature area of the bottom heat-taking section. The variable fins 14 which are radial along the circumference are arranged at the position, the front view presents a trapezoid shape, the high-temperature raw gas transfers heat to the variable fins 14 and the inner wall of the ascending tube of the high-temperature area of the heat taking section in a comprehensive form of thermal radiation and thermal convection, the heat is transferred to the outer side along the fins and the inner wall of the ascending tube and is gradually transferred to the coil 18 of the high-temperature area, and the circulated water brings the heat to the steam pocket to complete the high-temperature heat taking process.
Raw gas enters the medium-temperature zone after passing through the high-temperature zone of the heat taking section, and the heat of the raw gas is gradually transferred to the coil 17 of the medium-temperature zone through the quantitative rectangular fins 13 and the inner wall of the ascending tube of the medium-temperature zone. Then the heat is conducted to the circulating water through the pipe wall of the coil pipe 17 at the middle temperature section, and the water brings the heat to the steam pocket. And finally, the raw gas flows to the bridge pipe section through the outlet flange 2 and the outlet 1 of the medium temperature heat-taking section.
The tube seat 15 and the variable fins 14 are distributed in a radiation corresponding mode, and the heat conduction efficiency of the variable fins 14 and the tube wall of the high-temperature section coil 18 can be improved.
1. If more superheated steam is needed, a high-temperature region into which steam is introduced by a steam drum can be adopted for heating. When one group of the utility model is connected in series, the utility model can use a method of connecting a plurality of groups of the utility model high temperature areas in series to heat step by step.
2. When more low-pressure saturated steam is needed, the medium-temperature area and the high-temperature area of the heat-taking section can be connected in series, and the water flow is properly regulated. Realizing the production of low-pressure saturated steam.
Claims (8)
1. A sectional combination variable fin heat exchanger of a coke oven ascending pipe is characterized in that: the side of the inner wall of the ascending pipe is coiled with an independently circulating medium-temperature section coil pipe (16) and a high-temperature section coil pipe (17), and the heat-taking section in the ascending pipe is correspondingly divided into a medium-temperature area and a high-temperature area; the medium-temperature section coil (16) of the medium-temperature area is positioned at the upper part of the heat taking section, the high-temperature section coil (17) of the high-temperature area is positioned at the lower part of the heat taking section, the bottom of the heat taking section is provided with a high-temperature heat taking section inlet (9), the high-temperature heat taking section outlet at the middle part of the heat taking section is simultaneously used as a medium-temperature heat taking section inlet, and the top of the heat taking section is provided with a medium-temperature heat taking section outlet (1).
2. The sectional combination variable fin heat exchanger of the coke oven ascending pipe according to claim 1, characterized in that: a medium-temperature section water inlet (5) and a medium-temperature section water outlet (6) of the medium-temperature section coil pipe (16) are positioned at the bottom of the medium-temperature zone, and a high-temperature section steam outlet (11) and a high-temperature section steam inlet (12) of the high-temperature section coil pipe (17) are positioned at the top of the high-temperature zone; namely: the medium temperature section water inlet (5) and the medium temperature section water outlet (6) of the medium temperature section coil pipe (16), the high temperature section steam outlet (11) and the high temperature section steam inlet (12) of the high temperature section coil pipe (17) are all positioned in the middle of the heat extraction section.
3. The sectional combined variable fin heat exchanger of the coke oven ascension pipe according to claim 1 or 2, characterized in that a plurality of vertically arranged fins are arranged on the inner walls of the medium-temperature section coil pipe (16) and the high-temperature section coil pipe (17) along the circumferential direction; the fins of the medium temperature zone are quantitative fins (13), namely the width of the fins is equal from top to bottom; the fins in the high-temperature area are variable fins (14), namely the widths of the fins are unequal from top to bottom.
4. The sectional combined variable fin heat exchanger of the coke oven ascension pipe according to claim 3, characterized in that the width of the variable fins (14) is gradually increased from top to bottom, and the width of the tops of the variable fins (14) is equal to the width of the quantitative fins (13).
5. The sectional combined variable fin heat exchanger of the coke oven ascension pipe according to claim 1 or 2, characterized in that an insulating layer (3) and a heat-resistant filling layer (4) are arranged around the middle temperature zone of the heat extraction section, and a heat-resistant filling protective layer (18) and a heat-insulating protective layer (19) are arranged around the high temperature zone of the heat extraction section to jointly form a heat-insulating shell of the heat extraction section.
6. The sectional combined variable fin heat exchanger of the coke oven ascension pipe according to claim 5, characterized in that a plurality of pipe seats (15) are arranged on the circumference of the heat-insulating shell, and the medium-temperature section coil (16) and the high-temperature section coil (17) are installed on the respective corresponding pipe seats (15).
7. The sectional combined variable fin heat exchanger of the coke oven ascension pipe according to claim 1 or 2, characterized in that the outlet (1) of the medium temperature heat extraction section is provided with an outlet flange (2), and the inlet (9) of the high temperature heat extraction section is provided with an inlet flange (8).
8. The sectional combined variable fin heat exchanger of the coke oven ascension pipe according to claim 1 or 2, characterized in that the medium temperature section coil (16) starts to return from the medium temperature section water inlet (5) to the upper pan, returns to the outlet flange (2) through the medium temperature section coil connecting elbow (10) to the lower pan, and returns to the medium temperature section water outlet (6); the high-temperature section coil (17) returns to the lower plate from the high-temperature section steam inlet (12), returns to the upper plate after passing through the high-temperature section coil connecting elbow (7) at the inlet flange (8), and returns to the high-temperature section steam outlet (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122786945.9U CN216245703U (en) | 2021-11-15 | 2021-11-15 | Sectional combined variable fin heat exchanger for ascending pipe of coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122786945.9U CN216245703U (en) | 2021-11-15 | 2021-11-15 | Sectional combined variable fin heat exchanger for ascending pipe of coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216245703U true CN216245703U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122786945.9U Active CN216245703U (en) | 2021-11-15 | 2021-11-15 | Sectional combined variable fin heat exchanger for ascending pipe of coke oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216245703U (en) |
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2021
- 2021-11-15 CN CN202122786945.9U patent/CN216245703U/en active Active
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