CN220170001U - Tunnel kiln waste heat utilization equipment - Google Patents
Tunnel kiln waste heat utilization equipment Download PDFInfo
- Publication number
- CN220170001U CN220170001U CN202321631593.2U CN202321631593U CN220170001U CN 220170001 U CN220170001 U CN 220170001U CN 202321631593 U CN202321631593 U CN 202321631593U CN 220170001 U CN220170001 U CN 220170001U
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- China
- Prior art keywords
- air
- flue gas
- waste heat
- heat utilization
- tunnel kiln
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- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000003546 flue gas Substances 0.000 claims abstract description 55
- 238000005338 heat storage Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 16
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The tunnel kiln waste heat utilization equipment comprises a first exhaust fan, a first blower, a kiln body and two regenerators; the middle section in the kiln body is provided with a gas heating device, the outer wall of the feeding end of the kiln body is provided with a first vent, a plurality of heat storages are arranged in the heat storage chamber, the heat storage chamber is connected with a flue gas inlet pipe, a flue gas outlet pipe, an air inlet pipe and an air outlet pipe, and valves are arranged on the flue gas inlet pipe, the flue gas outlet pipe, the air inlet pipe and the air outlet pipe; the air inlet end of the first exhaust fan is correspondingly connected with the first air vent of the kiln body, and the air outlet end of the first exhaust fan is correspondingly communicated with the two flue gas inlet pipes respectively; the air outlet end of the first air blower is correspondingly communicated with two air inlet pipes respectively, and the two air outlet pipes are correspondingly communicated with an air supply pipe of the gas heating device respectively; the tunnel kiln waste heat utilization equipment can directly utilize the waste heat of the flue gas in the tunnel kiln, and improves the utilization efficiency.
Description
Technical Field
The utility model relates to the technical field of tunnel kilns, in particular to a tunnel kiln waste heat utilization device.
Background
The tunnel kiln is used for roasting production and generally comprises a kiln body, a fuel combustion system, ventilation equipment and kiln inner conveying equipment for conveying roasted materials, wherein the kiln body is sequentially divided into a preheating section, a roasting section and a cooling section along the conveying direction of the materials, an air inlet is formed in the cooling section, a smoke outlet is formed in the preheating section, thus cold air enters from the air inlet, the roasted materials can be cooled, and when combustion flue gas is discharged from the smoke outlet, the materials which just enter the kiln body can be preheated; the roasting temperature of the existing low-temperature tunnel kiln is above 1000 ℃, so that the temperature of flue gas is still higher when the flue gas is discharged, and if the flue gas cannot be used for waste heat utilization, serious waste is caused; most of the existing waste heat utilization methods are to introduce high-temperature flue gas into a heat exchanger to exchange heat into high-temperature water for storage and use, the rest heat cannot be directly utilized by a tunnel kiln, and the utilization efficiency of the waste heat is low.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model discloses a tunnel kiln waste heat utilization device which can directly utilize the waste heat of flue gas in a tunnel kiln and improve the utilization efficiency.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:
a tunnel kiln waste heat utilization device comprises a first exhaust fan, a first blower, a kiln body and two regenerators; the middle section in the kiln body is provided with a gas heating device, the outer wall of the feeding end of the kiln body is provided with a first air vent, a plurality of heat storages are arranged in the heat storage chamber, the heat storage chamber is connected with a flue gas inlet pipe, a flue gas outlet pipe, an air inlet pipe and an air outlet pipe, and valves are arranged on the flue gas inlet pipe, the flue gas outlet pipe, the air inlet pipe and the air outlet pipe; the air inlet end of the first exhaust fan is correspondingly connected with the first air vent of the kiln body, and the air outlet end of the first exhaust fan is correspondingly communicated with the two flue gas inlet pipes respectively; the air outlet end of the first air blower is correspondingly communicated with two air inlet pipes respectively, and the two air outlet pipes are correspondingly communicated with an air supply pipe of the gas heating device respectively.
Further, the waste heat utilization equipment further comprises a second air blower, a second air vent is arranged on the outer wall of the discharging end of the kiln body, and the air outlet end of the second air blower is correspondingly connected with the second air vent.
Further, the waste heat utilization equipment further comprises a second exhaust fan, a third air port is arranged on the outer wall of the kiln body between the feeding port and the first air port, and the air inlet end of the second exhaust fan is correspondingly connected with the third air port.
Further, an air filter device is arranged at the air inlet end of the first air blower.
Further, the first vent is provided with a temperature measuring device.
Further, the flue gas inlet pipe, the flue gas outlet pipe, the air inlet pipe and the air outlet pipe are respectively arranged at opposite angles at two ends of the regenerator.
Further, the heat accumulator is provided as a heat accumulating ball.
Further, the heat accumulator is made of heat-resistant steel or heat-resistant alloy steel.
Further, the valve is set as an automatic control valve, and the waste heat utilization device further comprises a control device which is respectively connected with the automatic control valve, the first exhaust fan and the first blower in a signal mode.
Further, the flue gas outlet pipe is connected with a flue gas treatment device.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
according to the tunnel kiln waste heat utilization equipment disclosed by the utility model, the characteristics of small occupied area, high-efficiency energy storage and long-time heat release of the regenerators are utilized, the two regenerators are used for switching heat storage, so that the discharged high-temperature flue gas can be subjected to continuous waste heat recovery, and after the external clean air is continuously heated, the external clean air is sent into the gas heating device and is directly used for kiln body heating, combustion supporting and heating, so that the gas consumption of the gas heating device can be reduced, the cost can be saved, and the utilization efficiency of the flue gas waste heat can be greatly improved.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present utility model.
In the figure: 1. a kiln body; 2. a gas heating device; 3. a first exhaust fan; 4. a regenerator; 5. a heat storage body; 6. a flue gas inlet pipe; 7. an air outlet pipe; 8. an air inlet pipe; 9. a flue gas outlet pipe; 10. a first blower; 11. an air filtration device; 12. a second exhaust fan; 13. a second blower; 14. a flue gas treatment device.
Detailed Description
In the description, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., the drawings merely correspond to the drawings of the present utility model, and in order to facilitate description of the present utility model, it is not indicated or implied that the device or element referred to must have a specific azimuth:
example 1
The tunnel kiln waste heat utilization device described with reference to fig. 1 comprises a first exhaust fan 3, a first blower 10, a kiln body 1 and two regenerators 4; the middle section in the kiln body 1 is provided with a gas heating device 2, the gas adopts gas or natural gas, and the mixed air is heated and roasted after being ignited; the outer wall of the feeding end of the kiln body 1 is provided with a first vent, a plurality of heat accumulators 5 are arranged in the heat accumulators 4, the heat accumulators 5 are solid, and can store heat efficiently and release heat for a long time, the heat accumulators 4 are connected with a flue gas inlet pipe 6, a flue gas outlet pipe 9, an air inlet pipe 8 and an air outlet pipe 7, and valves are arranged on the flue gas inlet pipe 6, the flue gas outlet pipe 9, the air inlet pipe 8 and the air outlet pipe 7; in addition, the flue gas inlet pipe 6 and the flue gas outlet pipe 9, and the air inlet pipe 8 and the air outlet pipe 7 are respectively arranged at opposite angles at the two ends of the regenerator 4, so that fluid entering the regenerator 4 can fully and directly contact with the regenerator 5 for conducting heat exchange and radiation heat exchange, and compared with the traditional heat exchanger, the heat exchanger has the advantages of indirect contact, conducting heat exchange and higher efficiency;
the air inlet end of the first exhaust fan 3 is correspondingly connected with a first air vent of the kiln body 1, cold air entering from a discharge port of the kiln body 1 cools and exchanges heat, then heats up through the middle section of the kiln body 1, then partially preheats the material and discharges the material from the first air vent, the air outlet end of the first exhaust fan 3 is correspondingly communicated with two flue gas inlet pipes 6 respectively and is used for conveying high-temperature flue gas discharged from the kiln body 1 into the regenerator 4, in addition, a flue gas outlet pipe 9 is connected with a flue gas treatment device 14, and the flue gas discharged from the regenerator 4 is treated and discharged to protect the environment; the air inlet end of the first blower 10 is provided with an air filtering device 11 for filtering air entering the regenerator 4, the air outlet end of the first blower 10 is correspondingly communicated with two air inlet pipes 9 respectively, two air outlet pipes 7 are correspondingly communicated with air supply pipes of the gas heating device 2 respectively, and clean air outside is sent to the gas heating device 2 after being heated by the regenerator 4 and is directly used for roasting, heating, combustion supporting and heating of the kiln body 1;
the valve is set as an automatic control valve according to the requirement, and the waste heat utilization equipment further comprises a control device which is respectively connected with the automatic control valve, the first exhaust fan 3 and the first blower 10 in a signal manner; firstly starting a gas heating device 2 to heat the roasting middle section of a kiln body 1, opening valves on a flue gas inlet pipe 6 and a flue gas outlet pipe 9 of one regenerator 4 to prepare for heat storage, simultaneously opening an air inlet pipe 8 and an air outlet pipe 7 of the other regenerator 4, and starting a first exhaust fan 3 and a first blower 10; when the kiln body 1 reaches the roasting temperature to roast the materials, and one regenerator 4 reaches the heat storage temperature (the heat storage temperature can be obtained through temperature detection), the flue gas inlet pipe 6 and the flue gas outlet pipe 9 of the regenerator 4 are closed, and the air inlet pipe 8 and the air outlet pipe 7 are opened, so that external air is sent into the middle roasting section of the kiln body 1 after being heated by the regenerator 4; simultaneously, the air inlet pipe 8 and the air outlet pipe 7 of the other regenerator 4 are closed, the flue gas inlet pipe 6 and the flue gas outlet pipe 9 are opened, and the flue gas is utilized to heat and store energy for the heat accumulator 5 of the other regenerator 4.
Example two
On the basis of the first embodiment, the waste heat utilization device further comprises a second air blower 13, a second air vent is arranged on the outer wall of the discharge end of the kiln body 1, the air outlet end of the second air blower 13 is correspondingly connected with the second air vent, positive pressure adjustment is carried out on the discharge end of the kiln body 1, and a proper amount of air is ensured to circulate from the discharge end of the kiln body 1 to the first air vent and is pumped away by the first exhaust fan 3; the waste heat utilization equipment further comprises a second exhaust fan 12 according to requirements, a third air vent is arranged on the outer wall of the kiln body 1 between the feed inlet and the first air vent, the air inlet end of the second exhaust fan 12 is correspondingly connected with the third air vent, negative pressure adjustment is carried out on the feed end of the kiln body 1, excessive cold air at the feed end of the kiln body 1 is prevented from being discharged by the first exhaust fan 3, and therefore when the roasting temperature is about 1200 ℃, the temperature of the first air vent can reach 500-700 ℃, and the high temperature is more beneficial to heat accumulation of the heat accumulation chamber 4; in addition, the first air vent is provided with a temperature measuring device for detecting the flue gas temperature of the first air vent, and the flue gas temperature can be adjusted by the fan power of the first exhaust fan 3 or the second air blower 13.
Example III
In the first embodiment, the heat storage body 5 is formed as a heat storage ball, and the contact area is increased, and the heat storage body 5 is formed of heat-resistant stainless steel or heat-resistant alloy steel, so that the heat storage or heat release efficiency can be improved, and the heat storage amount can be increased.
The utility model has not been described in detail in the prior art, and it is apparent to those skilled in the art that the utility model is not limited to the details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the above-described embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A tunnel kiln waste heat utilization device is characterized in that: comprises a first exhaust fan (3), a first blower (10), a kiln body (1) and two regenerators (4); the gas heating device (2) is arranged in the middle section in the kiln body (1), a first air vent is arranged on the outer wall of the feeding end of the kiln body (1), a plurality of heat storages (5) are arranged in the heat storages (4), the heat storages (4) are connected with a flue gas inlet pipe (6), a flue gas outlet pipe (9), an air inlet pipe (8) and an air outlet pipe (7), and valves are arranged on the flue gas inlet pipe (6), the flue gas outlet pipe (9), the air inlet pipe (8) and the air outlet pipe (7); the air inlet end of the first exhaust fan (3) is correspondingly connected with the first air vent of the kiln body (1), and the air outlet end of the first exhaust fan (3) is correspondingly communicated with the two flue gas inlet pipes (6) respectively; the air outlet end of the first blower (10) is correspondingly communicated with two air inlet pipes (8), and the two air outlet pipes (7) are correspondingly communicated with the air supply pipes of the gas heating device (2).
2. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the waste heat utilization equipment further comprises a second air blower (13), a second air vent is formed in the outer wall of the discharging end of the kiln body (1), and the air outlet end of the second air blower (13) is correspondingly connected with the second air vent.
3. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the waste heat utilization equipment further comprises a second exhaust fan (12), a third air vent is arranged on the outer wall of the kiln body (1) between the feeding port and the first air vent, and the air inlet end of the second exhaust fan (12) is correspondingly connected with the third air vent.
4. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: an air filter device (11) is arranged at the air inlet end of the first blower (10).
5. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the first vent is provided with a temperature measuring device.
6. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the flue gas inlet pipe (6) and the flue gas outlet pipe (9), and the air inlet pipe (8) and the air outlet pipe (7) are respectively arranged at opposite angles at two ends of the regenerator (4).
7. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the heat accumulator (5) is a heat accumulating ball.
8. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the heat accumulator (5) is made of heat-resistant steel or heat-resistant alloy steel.
9. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the valve is set as an automatic control valve, and the waste heat utilization equipment further comprises a control device which is respectively connected with the automatic control valve, the first exhaust fan (3) and the first blower (10) in a signal mode.
10. The tunnel kiln waste heat utilization apparatus according to claim 1, characterized in that: the flue gas outlet pipe (9) is connected with a flue gas treatment device (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321631593.2U CN220170001U (en) | 2023-06-26 | 2023-06-26 | Tunnel kiln waste heat utilization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321631593.2U CN220170001U (en) | 2023-06-26 | 2023-06-26 | Tunnel kiln waste heat utilization equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220170001U true CN220170001U (en) | 2023-12-12 |
Family
ID=89055280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321631593.2U Active CN220170001U (en) | 2023-06-26 | 2023-06-26 | Tunnel kiln waste heat utilization equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220170001U (en) |
-
2023
- 2023-06-26 CN CN202321631593.2U patent/CN220170001U/en active Active
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