CN211926550U - Furnace top waste heat recovery system of heating furnace - Google Patents
Furnace top waste heat recovery system of heating furnace Download PDFInfo
- Publication number
- CN211926550U CN211926550U CN202020425222.9U CN202020425222U CN211926550U CN 211926550 U CN211926550 U CN 211926550U CN 202020425222 U CN202020425222 U CN 202020425222U CN 211926550 U CN211926550 U CN 211926550U
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- water
- water tank
- pipe
- heat exchange
- gate valve
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 49
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 238000004321 preservation Methods 0.000 claims description 22
- 238000002791 soaking Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model relates to a heating furnace top waste heat recovery system, which comprises a water tank, a first water pump and a heat exchange tube, wherein the inlet of the first water pump is connected with the water tank, the outlet of the first water pump is connected with the heat exchange tube laid on the furnace top, and the other end of the heat exchange tube is connected with the water tank; the water tank is provided with a cold water inlet and a hot water outlet. An electric gate valve is installed at a cold water inlet and used for injecting domestic cold water into a water tank, water in the water tank is pumped out by a first water pump and is input into a heat exchange tube, cold water in the heat exchange tube flows back into the water tank after absorbing heat of a furnace top, a heat absorption cycle is completed in this way, the temperature in the water tank rises after a period of cycle, when the water in the water tank rises to a certain temperature, the water is input into a hot water tank of a living area through opening an electric gate valve installed at a hot water outlet, and therefore the purpose of recovering waste heat of the furnace top is achieved.
Description
Technical Field
The utility model relates to an industrial furnace technical field specifically is a heating furnace roof waste heat recovery system.
Background
The heating furnace is an important process in steel rolling and heat treatment industries, when the heating furnace works conventionally, the temperature in the furnace is distributed according to a preheating furnace section, a heating furnace section and a soaking furnace section, the temperature is generally 800-1300 ℃, the temperature is regulated according to YB/T4242-2011< < steel rolling heating furnace skill design technical specification > > of steel enterprises, when the temperature of the furnace is 900 ℃, the temperature of a side wall is less than or equal to 80 ℃, and the temperature of the top of the furnace is less than or equal to 90 ℃; when the furnace temperature is 1300 ℃, the side wall temperature is less than or equal to 105 ℃, and the furnace top temperature is less than or equal to 120 ℃. Along with the increase of the furnace age of the heating furnace, the refractory materials in the furnace gradually age, the temperature of the furnace top and the side wall becomes higher, generally about 120-. Because the side wall burner equipment is more complicated, the furnace roof is more level and smooth orderly, and the heat loss of furnace body is mainly concentrated in the furnace roof moreover, so how to recycle the heat of furnace roof becomes the problem that this company awaits a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: how to recycle the heat at the top of the heating furnace.
The utility model provides a heating furnace top waste heat recovery system, which comprises a water tank, a first water pump and a heat exchange tube, wherein the inlet of the first water pump is connected with the water tank, the outlet of the first water pump is connected with one end of the heat exchange tube laid on the heating furnace top, and the other end of the heat exchange tube is connected with the water tank;
the water tank is provided with a cold water inlet and a hot water outlet.
The utility model discloses a theory of operation does: an electric gate valve is installed at a cold water inlet and used for injecting domestic cold water into a water tank, water in the water tank is pumped out by a first water pump and is input into a heat exchange pipe, cold water in the heat exchange pipe flows back into the water tank after absorbing heat of the furnace top of the heating furnace, a heat absorption cycle is completed in this way, the temperature in the water tank rises after a period of cycle, when the water in the water tank rises to a certain temperature, the water is input into a hot water tank of a living area through opening an electric gate valve installed at a hot water outlet, and therefore the purpose of recovering waste heat of the furnace top is achieved.
Furthermore, a flow regulating valve is connected between the first water pump and the heat exchange pipe. The flow regulating valve controls the flow speed according to the actual temperature condition of the furnace top, and the situation that the water temperature reaches the set hot water temperature and opens the electric gate valve at the hot water outlet in the water tank water supplementing process is avoided.
Further, the first water pump is connected in parallel with a second water pump. The first water pump and the second water pump are used and prepared, and stable operation of the system is guaranteed.
Furthermore, the upper end of the heat exchange tube is covered with a heat preservation piece. The heat preservation piece adopts aluminium silicate heat preservation blanket, avoids the heat loss in the heat exchange tube.
Furthermore, an exhaust valve is installed at the upper end of the water tank. After the temperature of water in the water tank rises, the pressure can increase, consequently set up discharge valve, make discharge valve be in normally open state to adjust the aperture according to the displacement, make the pressure q in the water tank stable.
Further, a temperature transmitter is installed on the water tank. The temperature transmitter controls the opening of the electric gate valve at the hot water outlet by measuring the water temperature in the water tank.
Further, the heat exchange tube comprises a preheating tube, a heating tube and a soaking tube which are connected in sequence;
an outlet gate valve and an inlet gate valve are arranged between the preheating pipe and the heating pipe, an outlet gate valve and an inlet gate valve are arranged between the heating pipe and the soaking pipe, an inlet gate valve is arranged between the first water pump and the heat exchange pipe, and an outlet gate valve is arranged between the heat exchange pipe and the water tank;
the preheating pipe, the heating pipe and the soaking pipe are all connected with a sewage discharge valve group.
When a certain section of heat exchange tube fails, only gate valves at two ends of the section of heat exchange tube need to be closed, and the heat exchange tube can be overhauled after being emptied by a blowdown valve group, so that the overhauling workload is small; and the two ends of the heat exchange tube which is broken down are communicated only by the metal hose, so that the utility model can be normally operated.
Further, the adjacent inlet gate valve and the outlet gate valve are connected through a hose. The hose is easy to bend, thereby reducing the difficulty of connecting the inlet gate valve and the outlet gate valve.
Furthermore, the heat preservation piece comprises a preheating pipe heat preservation piece corresponding to the preheating pipe, a heating pipe heat preservation piece corresponding to the heating pipe and a soaking pipe heat preservation piece corresponding to the soaking pipe. When a certain section of heat exchange tube breaks down, the heat-insulating part can be overhauled only by dismantling the corresponding heat-insulating part, and the dismantling is more convenient.
Further, a liquid level meter is installed on the water tank. The liquid level meter is used for measuring the liquid level in the water tank, and when the liquid level in the water tank is lower than a set low liquid level, the electric gate valve at the cold water inlet is started to replenish water, and the electric gate valve at the hot water outlet is closed; when the liquid level in the water tank is higher than the set high liquid level, the electric gate valve at the cold water inlet is closed, so that the water replenishing work is automatically completed.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. a water tank; 2. a first water pump; 3. a heat exchange pipe; 4. a flow regulating valve; 5. a second water pump; 6. a heat preservation member; 7. an exhaust valve; 8. a temperature transmitter; 9. an outlet gate valve; 10 inlet gate valve; 11. a cold water inlet; 12. a hot water outlet; 13. a hose; 14. a liquid level meter; 31. a preheating pipe; 32. heating a tube; 33. soaking pipes; 61. preheating a pipe heat-insulating part; 62. heating a pipe heat-insulating part; 63. soaking pipe heat preservation spare.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the utility model relates to a heating furnace top waste heat recovery system, which comprises a water tank 1, a first water pump 2, a second water pump 5 and a heat exchange tube 3, wherein the first water pump 2 and the second water pump 5 are connected in parallel, the inlet of the first water pump is connected with the bottom of the water tank 1, the outlet of the first water pump is sequentially connected with a flow regulating valve 4, an inlet gate valve 10, the heat exchange tube 3 and an outlet gate valve 9, and the outlet gate valve 9 is connected with the upper part of the water tank 1 through a pipeline; the flow regulating valve 4 controls the flow speed according to the actual temperature condition of the furnace top, so that the situation that the electric gate valve at the hot water outlet 12 is opened when the water temperature reaches the set hot water temperature in the water replenishing process of the water tank 1 is avoided;
the water tank 1 is provided with a cold water inlet 11 and a hot water outlet 12, and the cold water inlet 11 and the hot water outlet 12 are both provided with electric gate valves;
a liquid level meter 14, an exhaust valve 7 and a temperature transmitter 8 are arranged on the water tank 1; the liquid level meter 14 is used for measuring the liquid level in the water tank 1, and when the liquid level in the water tank 1 is lower than a set low liquid level, an electric gate valve at the cold water inlet 11 is started for water supplement, and an electric gate valve at the hot water outlet 12 is closed; when the liquid level in the water tank 1 is higher than the set high liquid level, the electric gate valve at the cold water inlet 11 is closed, so that the water replenishing work is automatically completed; the exhaust valve 7 is in a normally open state, and the opening degree is adjusted according to the exhaust amount, so that the pressure in the water tank 1 is stable; the temperature transmitter 8 controls the opening of the electric gate valve at the hot water outlet 12 by measuring the water temperature in the water tank 1;
the heat exchange tube 3 is divided into three sections, namely a preheating tube 31, a heating tube 32 and a soaking tube, wherein the preheating tube 31 is laid at the upper end of the preheating furnace section, the heating tube 32 is laid at the upper end of the heating furnace section, the soaking tube is laid at the upper end of the soaking furnace section, an outlet gate valve 9 and an inlet gate valve 10 are arranged between the preheating tube 31 and the heating tube 32, and an outlet gate valve 9 and an inlet gate valve 10 are arranged between the heating tube 32 and the soaking tube; the preheating pipe 31, the heating pipe 32 and the soaking pipe are all connected with a sewage discharge valve bank; when a certain section of heat exchange tube 3 has a fault, the gate valves at two ends of the section of heat exchange tube 3 are only required to be closed, and the heat exchange tube can be overhauled after being emptied by the blowdown valve group, so that the overhauling workload is small; moreover, the utility model can be normally operated only by connecting the two ends of the heat exchange tube 3 with faults through the metal hose 13; the adjacent inlet gate valve 10 and the adjacent outlet gate valve 9 are connected through the hose 13, and the hose 13 is easy to bend, so that the difficulty in connecting the inlet gate valve 10 and the outlet gate valve 9 is reduced;
the upper end of the heat exchange tube 3 is covered with a heat preservation piece 6, and the heat preservation piece 6 adopts an aluminum silicate heat preservation blanket to avoid heat loss in the heat exchange tube 3; the heat preservation part 6 comprises a preheating pipe heat preservation part 61 corresponding to the preheating pipe 31, a heating pipe heat preservation part 62 corresponding to the heating pipe 32 and a soaking pipe heat preservation part 63 corresponding to the soaking pipe 33, when a certain section of heat exchange pipe 3 breaks down, the heat preservation part 6 can be repaired only by being dismounted, and the dismounting is more convenient;
the utility model discloses a theory of operation does: the electric gate valve at the cold water inlet injects domestic cold water into the water tank 1, the water pump pumps the water in the water tank 1 and inputs the water into the heat exchange tube 3, the cold water in the heat exchange tube 3 absorbs the heat of the furnace top of the heating furnace and then flows back into the water tank 1, so a heat absorption cycle is completed, after a period of cycle, the temperature in the water tank 1 rises, and when the water in the water tank 1 rises to a certain temperature, the water is input into a hot water tank of a living area through a hot water outlet, so the purpose of recovering the waste heat of the furnace top is achieved, energy can be saved, consumption can be reduced, hot water supply of the living area can be provided, and meanwhile, the environmental temperature of the.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a heating furnace roof waste heat recovery system which characterized in that: the device comprises a water tank (1), a first water pump (2) and a heat exchange tube (3), wherein the inlet of the first water pump (2) is connected with the water tank (1), the outlet of the first water pump (2) is connected with one end of the heat exchange tube (3) laid on the top of a heating furnace, and the other end of the heat exchange tube (3) is connected with the water tank (1);
the water tank (1) is provided with a cold water inlet (11) and a hot water outlet (12).
2. The heating furnace top waste heat recovery system according to claim 1, characterized in that: and a flow regulating valve (4) is connected between the first water pump (2) and the heat exchange tube (3).
3. The heating furnace top waste heat recovery system according to claim 1, characterized in that: the first water pump (2) is connected with a second water pump (5) in parallel.
4. The heating furnace top waste heat recovery system according to claim 1, characterized in that: the upper end of the heat exchange tube (3) is covered with a heat preservation piece (6).
5. The heating furnace top waste heat recovery system according to claim 1, characterized in that: an exhaust valve (7) is installed at the upper end of the water tank (1).
6. The heating furnace top waste heat recovery system according to claim 1, characterized in that: and a temperature transmitter (8) is arranged on the water tank (1).
7. The heating furnace top waste heat recovery system according to claim 4, characterized in that: the heat exchange tube (3) comprises a preheating tube (31), a heating tube (32) and a soaking tube (33) which are connected in sequence;
an outlet gate valve (9) and an inlet gate valve (10) are arranged between the preheating pipe (31) and the heating pipe (32), an outlet gate valve (9) and an inlet gate valve (10) are arranged between the heating pipe (32) and the soaking pipe (33), an inlet gate valve (10) is arranged between the first water pump (2) and the heat exchange pipe (3), and an outlet gate valve (9) is arranged between the heat exchange pipe (3) and the water tank (1);
the preheating pipe (31), the heating pipe (32) and the soaking pipe (33) are all connected with a sewage discharge valve group (34).
8. The heating furnace top waste heat recovery system according to claim 7, characterized in that: the adjacent inlet gate valve (10) and the outlet gate valve (9) are connected through a hose (13).
9. The heating furnace top waste heat recovery system according to claim 7, characterized in that: the heat preservation piece (6) comprises a preheating pipe heat preservation piece (61) corresponding to the preheating pipe (31), a heating pipe heat preservation piece (62) corresponding to the heating pipe (32) and a soaking pipe heat preservation piece (63) corresponding to the soaking pipe (33).
10. The heating furnace top waste heat recovery system according to claim 6, characterized in that: and a liquid level meter (14) is arranged on the water tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020425222.9U CN211926550U (en) | 2020-03-27 | 2020-03-27 | Furnace top waste heat recovery system of heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020425222.9U CN211926550U (en) | 2020-03-27 | 2020-03-27 | Furnace top waste heat recovery system of heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211926550U true CN211926550U (en) | 2020-11-13 |
Family
ID=73348309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020425222.9U Active CN211926550U (en) | 2020-03-27 | 2020-03-27 | Furnace top waste heat recovery system of heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211926550U (en) |
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2020
- 2020-03-27 CN CN202020425222.9U patent/CN211926550U/en active Active
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