CN217715971U - Kiln flue gas waste heat recovery system - Google Patents
Kiln flue gas waste heat recovery system Download PDFInfo
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- CN217715971U CN217715971U CN202220059031.4U CN202220059031U CN217715971U CN 217715971 U CN217715971 U CN 217715971U CN 202220059031 U CN202220059031 U CN 202220059031U CN 217715971 U CN217715971 U CN 217715971U
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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
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Abstract
The utility model relates to a kiln heat recovery field discloses a kiln flue gas waste heat recovery system, including kiln, heat transfer device, gas station, first detection device and second detection device, the top of kiln pass through the pipeline with heat transfer device's inlet end is connected, heat transfer device's the end of giving vent to anger pass through the pipeline with the bottom of kiln is connected, the gas station give vent to anger the end with heat transfer device's inlet end is connected. Through leading into heat transfer device with kiln top exhaust flue gas, carry out the heat exchange with the protective gas that comes from the gas station, the protective gas through the heat exchange is owing to have certain temperature, great temperature fluctuation can not appear when leading into the kiln, guarantee as far as in the kiln temperature keep in a invariable scope, can not influence the difference in temperature in the kiln, guaranteed the atmosphere stability in the kiln, guarantee that product quality is good in the kiln, and can save the energy resource consumption who heats the protective gas, reduction in production cost.
Description
[ technical field ] A
The utility model relates to a kiln heat recovery field, in particular to kiln flue gas waste heat recovery system.
[ background ] A method for producing a semiconductor device
The preparation of the lithium battery cathode material is mainly finished by high-temperature sintering under the protection of atmosphere, the quality of the product is closely related to the temperature and the atmosphere of a kiln, a large amount of resources are consumed by the sintering of the kiln and the protection of the atmosphere, and how to improve the utilization efficiency is a big subject of the lithium battery material production industry.
In the conventional production flow, gas is directly injected into a kiln, so that the temperature difference of the kiln is influenced, and the quality of a sintered product is reduced. A large amount of high-temperature flue gas can be generated in the production process, and the direct emission can cause the waste of energy.
[ summary of the invention ]
The utility model discloses a solve above-mentioned problem and provide a kiln flue gas waste heat recovery system, solve the production in current kiln consumption resource too much, the temperature difference is unstable in the kiln, and is undulant big, leads to the not good problem of product quality.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a kiln flue gas waste heat recovery system, includes kiln, heat transfer device, gas station, first detection device and second detection device, the top of kiln pass through the pipeline with heat transfer device's inlet end is connected, heat transfer device's the end of giving vent to anger pass through the pipeline with the bottom of kiln is connected, the end of giving vent to anger of gas station with heat transfer device's inlet end is connected, first detection device locates the kiln top with on the pipeline between the heat transfer device inlet end, the second detection device is located the kiln bottom with heat transfer device gives vent to anger on the pipeline between the end, the flue gas at kiln top with the protection gas process of gas station output gets into once more after heat transfer device's the heat exchange in the kiln.
Preferably, the kiln comprises a heat preservation part, a temperature rise part and a heating device, the heating device is arranged in the kiln, the heat preservation part is arranged above the heating device, the top of the heat preservation part is connected with the air inlet end of the heat exchange device through a pipeline, the temperature rise part is arranged below the heating device, the bottom of the temperature rise part is connected with the air outlet end of the heat exchange device through a pipeline, and protective air enters the heat preservation part and the temperature rise part after passing through the heat exchange device.
Preferably, the pipeline is a heat-insulating pipeline, and the pipeline is made of stainless steel materials, so that the temperature of gas in the pipeline is kept unchanged.
Preferably, the first detection device comprises a first temperature sensor, and the first temperature sensor is arranged between the top of the kiln and the air inlet end of the heat exchange device and used for detecting the temperature of the flue gas coming out of the kiln.
Preferably, the first detection device further comprises a first electric valve, and the first electric valve is arranged between the first temperature sensor and the air inlet end of the heat exchange device and used for controlling the flue gas to enter the heat exchange device.
Preferably, the second detection device comprises a second temperature sensor, and the second temperature sensor is arranged between the air outlet end of the heat exchange device and the bottom of the kiln and used for detecting the temperature of the protective gas coming out of the heat exchange device.
Preferably, the second detection device further comprises a second electric valve, and the second electric valve is arranged between the second temperature sensor and the bottom of the kiln furnace and used for controlling protective gas to enter the kiln furnace.
Preferably, the device further comprises a third temperature sensor, and the third temperature sensor is arranged between the air outlet end of the heat exchange device and the outer discharge pipeline and used for detecting the temperature of the outer discharge flue gas.
The utility model discloses a contribution lies in: the utility model discloses an in letting in heat transfer device with kiln top exhaust flue gas, carry out the heat exchange with the protective gas that comes from the gas station, the protective gas through the heat exchange is owing to have certain temperature, great temperature fluctuation can not appear when leading to in the kiln, ensure the kiln internal temperature as far as and keep in a invariable scope, can not influence the difference in temperature in the kiln, the atmosphere stability in the kiln has been guaranteed, ensure that product quality is good in the kiln, and can sparingly heat the energy resource consumption of protective gas, and the production cost is reduced.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a flue gas waste heat recovery system of the present invention;
FIG. 2 is a schematic diagram of the flue gas thermal cycle of the present invention;
wherein: the system comprises a kiln 10, a heat preservation part 11, a temperature rising part 12, a heating device 13, a heat exchange device 20, a gas station 30, a first detection device 40, a first temperature sensor 41, a first electric valve 42, a second detection device 50, a second temperature sensor 51, a second electric valve 52 and a third temperature sensor 60.
[ detailed description ] embodiments
The following examples are further illustrative and supplementary to the present invention and do not constitute any limitation to the present invention.
As shown in fig. 1-2, a kiln flue gas waste heat recovery system includes a kiln 10, a heat exchange device 20, a gas station 30, a first detection device 40 and a second detection device 50, the top of the kiln 10 is connected with the gas inlet end of the heat exchange device 20 through a pipeline, the gas outlet end of the heat exchange device 20 is connected with the bottom of the kiln 10 through a pipeline, the gas outlet end of the gas station 30 is connected with the gas inlet end of the heat exchange device 20, the first detection device 40 is arranged on the pipeline between the top of the kiln 10 and the gas inlet end of the heat exchange device 20, the second detection device 50 is arranged on the pipeline between the bottom of the kiln 10 and the gas outlet end of the heat exchange device 20, and the flue gas at the top of the kiln 10 and the protective gas output by the gas station 30 enter the kiln 10 again after heat exchange by the heat exchange device 20.
The kiln flue gas waste heat recovery system mainly comprises a kiln 10, a heat exchange device 20, a gas station 30, a first detection device 40 and a second detection device 50, wherein the kiln 10 is used for sintering a cathode material of a lithium battery, the sintering temperature is generally kept above 600 ℃, a protective gas (the protective gas is helium) needs to be continuously injected in the sintering process, the gas components in the kiln 10 are all the protective gas, impurity gas is reduced as much as possible, the lithium battery material is prevented from reacting with the impurity gas, the quality of a sintered product is poor, the pressure in the kiln 10 is gradually increased due to the fact that the protective gas needs to be continuously injected in the sintering process, part of the protective gas needs to be discharged out of the kiln 10, the protective gas is directly discharged out of an insulation part 11 of the kiln 10 to the atmosphere through a pipeline in the conventional mode, so that a large amount of heat is wasted, on the other hand, the protective gas needs to be continuously supplemented, the temperature of the protective gas from the gas station 30 is too low, when the protective gas just enters the kiln 10, the protective gas needs to be subjected to heat exchange with the gas in a heating part 12, the heating device 13 can reach the required temperature after being heated, the protective gas reaches the temperature in the heating device 13, the heating temperature, the kiln, the energy consumption is greatly reduced, and the sintering effect is caused, and the sintering cost is reduced due to the fact that the effect of the kiln 10 is increased.
Further, a first detection device 40 is arranged between the heat preservation portion 11 of the kiln 10 and the air inlet end of the heat exchange device 20, the first detection device 40 comprises a first temperature sensor 41 and a first electric valve 42, the first temperature sensor 41 is used for detecting the temperature of the flue gas from the kiln 10, if the temperature of the flue gas is detected to be lower than 600 ℃, it is indicated that the temperature in the kiln 10 does not reach the standard, at the moment, the power of the heating device 13 needs to be increased, meanwhile, the introduction of the protective gas is stopped, the first electric valve 42 is closed, after the temperature of the flue gas detected by the first temperature sensor 41 is higher than 600 ℃, the first electric valve 42 is opened and the protective gas passes through, if the temperature of the flue gas detected from the kiln 10 is far higher than 600 ℃, it is indicated that the temperature in the kiln 10 is too high, at the moment, the power of the heating device 13 needs to be decreased, and the introduction amount of the protective gas needs to be increased, so that the temperature of the protective gas in the kiln 10 is controlled.
Further, a second detection device 50 is arranged between the bottom of the kiln 10 and the air outlet end of the heat exchange device 20, the second detection device 50 comprises a second temperature sensor 51 and a second electric valve 52, the second temperature sensor 51 is used for detecting the temperature of the shielding gas coming out of the heat exchange device 20, when the temperature of the shielding gas after heat exchange is too low (generally less than 400 ℃), the second electric valve 52 is closed, meanwhile, the power of the heating device 13 is increased, so that the temperature of the flue gas coming out of the kiln 10 is increased, the temperature of the shielding gas exchanging heat with the flue gas is increased, the temperature of the shielding gas entering the kiln 10 is ensured not to be lower than 400 ℃, the second electric valve 52 is opened, the shielding gas is allowed to enter the kiln 10, and the temperature difference of the shielding gas in the kiln 10 is ensured not to be influenced.
Further, when the temperature of the shielding gas passing through the heat exchanging device 20 is only slightly higher than 400 ℃, the second electric valve 52 for introducing the shielding gas into the heat insulating part 11 is closed, the second electric valve 52 for introducing the temperature rising part 12 is opened, the shielding gas is introduced into the temperature rising part 12, and enters the heat insulating part 11 after temperature rising, so that the sintering of the product in the kiln 10 is not greatly affected, when the temperature of the shielding gas passing through the heat exchanging device 20 is far higher than 400 ℃, the shielding gas is directly introduced into the heat insulating part 11, and the operation of the second electric valve 52 is opposite to that before.
Further, the temperature control device further comprises a third temperature sensor 60, the third temperature sensor 60 is arranged between the air outlet end of the heat exchanging device 20 and an external exhaust pipeline and is used for detecting the temperature of the externally exhausted flue gas, specifically, the third temperature sensor 60 detects the temperature of the exhausted flue gas, so that the adjustment of the temperature in the kiln 10 by an operator can be facilitated, specifically, when the temperature of the flue gas detected by the third temperature sensor 60 is too high (generally higher than 100 ℃), the temperature of the heating device 13 in the kiln 10 is reduced on the basis of increasing the introduction amount of the protective gas or keeping the original introduction amount, so that the temperature of the exhausted flue gas can be lower than 100 ℃.
The utility model discloses a let in heat transfer device 20 with kiln 10 top exhaust flue gas (being not less than 600 ℃), heat transfer device 20 is equipped with a plurality of inlet ends and gives vent to anger the end, kiln 10 top and gas station 30 are connected with heat transfer device 20's wherein two inlet ends respectively, kiln 10 bottom and exhaust duct are connected with heat transfer device 20's wherein two end of giving vent to anger respectively, further explanation, inlet end and how much of the end quantity of giving vent to anger are decided according to particular case), carry out the heat exchange with the guard gas that comes from gas station 30, the guard gas through the heat exchange (not less than 400 ℃) is owing to have certain temperature, great temperature fluctuation can not appear when letting in kiln 10, ensure temperature maintenance in kiln 10 as far as at a invariable scope, can not influence the difference in the kiln 10, the atmosphere stability in kiln 10 has been guaranteed, ensure that product quality is good in kiln 10, and can sparingly heat the energy consumption of guard gas.
Further, the kiln 10 comprises a heat preservation part 11, a temperature rise part 12 and a heating device 13, the heating device 13 is arranged in the kiln 10, the heat preservation part 11 is arranged above the heating device 13, the top of the heat preservation part 11 is connected with the air inlet end of the heat exchange device 20 through a pipeline, the temperature rise part 12 is arranged below the heating device 13, the bottom of the temperature rise part 12 is connected with the air outlet end of the heat exchange device 20 through a pipeline, and protective gas enters the heat preservation part 11 and the temperature rise part 12 after passing through the heat exchange device 20.
In a further aspect, the pipeline is a heat-insulating pipeline, and the pipeline is made of stainless steel, so as to ensure that the temperature of the gas in the pipeline is kept unchanged.
In a further description, the first detecting device 40 includes a first temperature sensor 41, and the first temperature sensor 41 is disposed between the top of the kiln 10 and the air inlet end of the heat exchanging device 20, and is used for detecting the temperature of the flue gas coming out of the kiln 10.
In a further description, the first detecting device 40 further includes a first electrically operated valve 42, and the first electrically operated valve 42 is disposed between the first temperature sensor 41 and the air inlet end of the heat exchanging device 20, and is used for controlling the flue gas to enter the heat exchanging device 20.
In a further description, the second detecting device 50 includes a second temperature sensor 51, and the second temperature sensor 51 is disposed between the gas outlet end of the heat exchanging device 20 and the bottom of the kiln 10, and is used for detecting the temperature of the shielding gas flowing out of the heat exchanging device 20.
In a further description, the second detecting device 50 further includes a second electric valve 52, and the second electric valve 52 is disposed between the second temperature sensor 51 and the bottom of the kiln 10 and is used for controlling the protective gas to enter the kiln 10.
In a further description, a third temperature sensor 60 is further included, and the third temperature sensor 60 is disposed between the air outlet end of the heat exchanging device 20 and the external exhaust pipeline, and is used for detecting the temperature of the external exhaust flue gas.
Although the present invention has been described in connection with the above embodiments, the scope of the present invention is not limited thereto, and modifications, replacements, and the like to the above members are all within the scope of the claims of the present invention without departing from the concept of the present invention.
Claims (8)
1. The utility model provides a kiln flue gas waste heat recovery system which characterized in that: including kiln, heat transfer device, gas station, first detection device and second detection device, the top of kiln pass through the pipeline with heat transfer device's inlet end is connected, heat transfer device's the end of giving vent to anger pass through the pipeline with the bottom of kiln is connected, the end of giving vent to anger of gas station with heat transfer device's inlet end is connected, first detection device locates the kiln top with on the pipeline between heat transfer device inlet end, second detection device locates the kiln bottom with heat transfer device gives vent to anger on the pipeline between the end, the flue gas at kiln top with the protection gas process of gas station output get into once more behind heat transfer device's the heat exchange in the kiln.
2. The kiln flue gas waste heat recovery system of claim 1, which is characterized in that: the kiln comprises a heat preservation part, a temperature rise part and a heating device, wherein the heating device is arranged in the kiln, the heat preservation part is arranged above the heating device, the top of the heat preservation part is connected with the air inlet end of the heat exchange device through a pipeline, the temperature rise part is arranged below the heating device, the bottom of the temperature rise part is connected with the air outlet end of the heat exchange device through a pipeline, and protective air enters the heat preservation part and the temperature rise part after passing through the heat exchange device.
3. The kiln flue gas waste heat recovery system of claim 1, which is characterized in that: the pipeline is a heat-insulating pipeline, and is made of stainless steel materials, so that the temperature of gas in the pipeline is kept unchanged.
4. The kiln flue gas waste heat recovery system of claim 1, which is characterized in that: the first detection device comprises a first temperature sensor, and the first temperature sensor is arranged between the top of the kiln and the air inlet end of the heat exchange device and used for detecting the temperature of flue gas coming out of the kiln.
5. The kiln flue gas waste heat recovery system of claim 4, characterized in that: the first detection device further comprises a first electric valve, and the first electric valve is arranged between the first temperature sensor and the air inlet end of the heat exchange device and used for controlling the flue gas to enter the heat exchange device.
6. The kiln flue gas waste heat recovery system of claim 1, which is characterized in that: the second detection device comprises a second temperature sensor, and the second temperature sensor is arranged between the air outlet end of the heat exchange device and the bottom of the kiln and used for detecting the temperature of the protective gas coming out of the heat exchange device.
7. The kiln flue gas waste heat recovery system of claim 6, wherein: the second detection device further comprises a second electric valve, and the second electric valve is arranged between the second temperature sensor and the bottom of the kiln and used for controlling protective gas to enter the kiln.
8. The kiln flue gas waste heat recovery system of claim 1, which is characterized in that: the third temperature sensor is arranged between the air outlet end of the heat exchange device and the outer discharge pipeline and used for detecting the temperature of the outer discharge smoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220059031.4U CN217715971U (en) | 2022-01-11 | 2022-01-11 | Kiln flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220059031.4U CN217715971U (en) | 2022-01-11 | 2022-01-11 | Kiln flue gas waste heat recovery system |
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| Publication Number | Publication Date |
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| CN217715971U true CN217715971U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220059031.4U Active CN217715971U (en) | 2022-01-11 | 2022-01-11 | Kiln flue gas waste heat recovery system |
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| CN (1) | CN217715971U (en) |
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- 2022-01-11 CN CN202220059031.4U patent/CN217715971U/en active Active
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