CN219656623U - Coal saving device utilizing low-temperature waste heat of cement firing - Google Patents
Coal saving device utilizing low-temperature waste heat of cement firing Download PDFInfo
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- CN219656623U CN219656623U CN202223352744.9U CN202223352744U CN219656623U CN 219656623 U CN219656623 U CN 219656623U CN 202223352744 U CN202223352744 U CN 202223352744U CN 219656623 U CN219656623 U CN 219656623U
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- 239000003245 coal Substances 0.000 title claims abstract description 72
- 239000004568 cement Substances 0.000 title claims abstract description 43
- 239000002918 waste heat Substances 0.000 title claims abstract description 38
- 238000010304 firing Methods 0.000 title claims abstract description 30
- 239000003921 oil Substances 0.000 claims description 71
- 238000004146 energy storage Methods 0.000 claims description 19
- 239000010724 circulating oil Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 10
- 239000002817 coal dust Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a coal saving device for low-temperature waste heat utilization in cement firing, and belongs to the field of low-temperature waste heat utilization. The heat-conducting oil coil is arranged on the outer surface of a heat absorber, an inlet pipe of the heat-conducting oil coil is connected to a heat-accumulating energy-storing oil tank through a coil oil inlet pipe, an in-tank heat exchange tube bundle is connected to an inlet end of a heat exchanger on a coal feeding pipe and an inlet end of an air heat exchanger on an air pipe through a heat exchange tube bundle outlet header pipe, and an inlet end of an in-tank heat exchange tube bundle outside a tank body is connected to an outlet end of the heat exchanger and an outlet end of the air heat exchanger through an in-tank heat exchange tube bundle inlet header pipe. The utility model recovers the heat of the decomposing furnace, the tertiary air pipe and the surface of the kiln head cover, saves the coal consumption in the cement firing process, and the total coal saving amount of the cement firing coal-saving device per day is about 5.3t/d; the device not only saves the enterprise cost, but also reduces the waste heat emission, thereby further improving the utilization efficiency of resources.
Description
Technical Field
The utility model relates to a coal saving device for low-temperature waste heat utilization of cement firing, and belongs to the field of low-temperature waste heat utilization.
Background
Along with the high-speed development of the economy of China, the demand of China for coal resources is larger and larger, but the phenomenon of shortage of the coal resources in recent years often occurs. In the cement sintering process, a large amount of coal resources are needed to be used, and in the cement coal forming process, the surface temperature of a plurality of devices is very high, and heat is directly discharged into the air, so that a large amount of waste heat is wasted. Therefore, the method for recycling a large amount of waste heat in the cement sintering process and enhancing the utilization efficiency of resources is a problem to be solved urgently.
In the cement firing process, the surfaces of the decomposing furnace, the tertiary air pipe and the kiln head cover have certain temperature, the temperature of the surfaces of equipment is directly diffused into the atmosphere, the environment is affected, the energy waste is caused, and the energy utilization efficiency is reduced. Therefore, the utility model provides a coal saving device for cement firing, which can recover heat on the surfaces of a decomposing furnace, a tertiary air pipe and a kiln head cover and save coal consumption in the cement firing process. Not only saves the enterprise cost, but also reduces the waste heat emission, thereby further improving the utilization efficiency of resources.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and further provides a coal saving device for utilizing low-temperature waste heat generated by cement firing.
The utility model aims at realizing the following technical scheme:
the coal saving device for cement burning low temperature waste heat utilization comprises a heat conducting oil coil, a coil oil outlet pipeline, a coil oil inlet pipeline, a circulating oil pump I, a liquid level meter, an energy storage heat conducting oil tank, a tank heat exchange tube bundle, a heat exchange tube bundle outlet header pipe, a tank heat exchange tube bundle inlet branch pipe I, a tank heat exchange tube bundle inlet branch pipe II, a circulating oil pump II, a tank heat exchange tube bundle outlet branch pipe I, a tank heat exchange tube bundle outlet branch pipe II, a heat exchanger, a coal supply pipeline, an air pipeline and an air heat exchanger,
the heat absorption device comprises an energy storage heat conduction oil tank, a heat conduction oil pipe coil, a heat exchange tube inlet pipe, a heat exchange tube bundle inlet branch pipe I, a heat exchange tube bundle II, a circulating oil pump II, an air heat exchanger, a heat exchange tube bundle I and an air heat exchanger, wherein the heat exchange tube coil is arranged on the outer surface of the heat absorption device, an inlet pipe of the heat conduction oil pipe coil is connected to the outlet end of the energy storage heat conduction oil tank through a coil oil inlet pipe, a circulating oil pump I is arranged on the coil oil inlet pipe, an outlet pipe of the heat exchange tube bundle is connected to the inlet end of the heat exchanger on a coal feeding pipe, an inlet end of the heat exchange tube bundle outside a tank body is connected to the inlet end of the heat exchange tube bundle I and the heat exchange tube bundle II through a coil oil outlet pipe, an outlet end of the heat exchange tube bundle I is connected to the outlet end of the heat exchanger, and an outlet end of the heat exchange tube bundle II is connected to the air heat exchanger.
The utility model relates to a coal saving device utilizing low-temperature waste heat of cement firing.
The utility model relates to a coal saving device utilizing low-temperature waste heat generated by cement firing.
The utility model relates to a coal saving device utilizing low-temperature waste heat generated by cement firing, wherein channel steel or pipes are longitudinally or circumferentially arranged.
The utility model relates to a coal saving device for utilizing low-temperature waste heat generated by cement firing.
The utility model relates to a coal saving device for utilizing low-temperature waste heat generated by cement firing.
The utility model relates to a coal saving device for low-temperature waste heat utilization in cement firing, which is arranged on the surfaces of a decomposing furnace, a tertiary air pipe and a kiln head cover, and is used for recovering heat on the surfaces of the decomposing furnace, the tertiary air pipe and the kiln head cover, so that the coal consumption in the cement firing process is saved, the air flow in the cement firing device is 20000NM3/h, the air temperature is calculated according to 150 ℃, and the daily coal saving amount is 2.9t/d; assuming that the coal powder amount used by the cement burning device is 20t/h, the coal powder temperature is calculated according to 150 ℃, and the coal saving amount per day is 2.4t/d, so that the total coal saving amount per day of the cement burning device is about 5.3t/d; the device not only saves the enterprise cost, but also reduces the waste heat emission, thereby further improving the utilization efficiency of resources.
Drawings
FIG. 1 is a schematic diagram of the structure of a kiln head hood section in a cement firing low temperature waste heat utilization coal saving device of the present utility model.
Fig. 2 is a front view of a kiln head cover in the coal saving device for utilizing the low-temperature waste heat of cement firing.
FIG. 3 is a side view of a kiln head cover in the coal saving device for utilizing the low-temperature waste heat of cement firing.
Fig. 4 is a schematic structural view of a decomposing furnace part in the coal saving device utilizing the low-temperature waste heat of cement firing.
Fig. 5 is a schematic structural view of the tertiary air pipe part in the coal saving device utilizing the low-temperature waste heat of cement firing in the utility model when the tertiary air pipe part is arranged in a circumferential direction.
Fig. 6 is a schematic structural view of the coal saving device utilizing the waste heat of cement firing at low temperature when the tertiary air pipe is arranged longitudinally.
Fig. 7 is a front view of the coal saving device utilizing the waste heat of the cement firing at low temperature when the tertiary air pipe is partially longitudinally arranged.
Fig. 8 is a side view of a tertiary air duct portion in a coal saving device utilizing waste heat of cement firing at low temperature according to the present utility model, as arranged longitudinally.
Reference numerals in the drawings, 1-1 are decomposing furnaces; 1-2 is a tertiary air duct; 1-3 is kiln head cover; 3 is a heat conducting oil coil; 5 is a coil oil outlet pipeline; 6 is a coil oil inlet pipeline; 7 is a circulating oil pump I; 8 is a liquid level meter; 9 is an energy storage heat conduction oil tank; 10 is a heat exchange tube bundle in the tank; 11 is the outlet header pipe of the heat exchange tube bundle; 12 is an inlet header pipe of the heat exchange tube bundle in the tank; 13 is an inlet branch pipe I of the heat exchange tube bundle in the tank; 14 is an inlet branch pipe II of the heat exchange tube bundle in the tank; 15 is a circulating oil pump II; 16 is an outlet branch pipe I of the heat exchange tube bundle in the tank; 17 is an outlet branch pipe II of the heat exchange tube bundle in the tank; 18 is a heat exchanger; 19 is a coal feeding pipeline; 20 is an air pipeline; 21 is an air heat exchanger.
Detailed Description
The utility model will be described in further detail with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present utility model, and a detailed implementation is given, but the scope of protection of the present utility model is not limited to the following embodiments.
Embodiment one: as shown in fig. 1 to 4, a coal saving device for low-temperature waste heat utilization in cement firing according to this embodiment includes: a heat transfer oil coil, a coil oil outlet pipeline, a coil oil inlet pipeline, a circulating oil pump I, a liquid level meter, an energy storage heat transfer oil tank, a heat exchange tube bundle in a tank, a heat exchange tube bundle outlet header, a tank heat exchange tube bundle inlet branch I, a tank heat exchange tube bundle inlet branch II, a circulating oil pump II, a tank heat exchange tube bundle outlet branch I, a tank heat exchange tube bundle outlet branch II, a heat exchanger, a coal supply pipeline, an air pipeline and an air heat exchanger,
the heat absorption device comprises an energy storage heat conduction oil tank, a heat conduction oil pipe coil, a heat exchange tube inlet pipe, a heat exchange tube bundle inlet branch pipe I, a heat exchange tube bundle II, a circulating oil pump II, an air heat exchanger, a heat exchange tube bundle I and an air heat exchanger, wherein the heat exchange tube coil is arranged on the outer surface of the heat absorption device, an inlet pipe of the heat conduction oil pipe coil is connected to the outlet end of the energy storage heat conduction oil tank through a coil oil inlet pipe, a circulating oil pump I is arranged on the coil oil inlet pipe, an outlet pipe of the heat exchange tube bundle is connected to the inlet end of the heat exchanger on a coal feeding pipe, an inlet end of the heat exchange tube bundle outside a tank body is connected to the inlet end of the heat exchange tube bundle I and the heat exchange tube bundle II through a coil oil outlet pipe, an outlet end of the heat exchange tube bundle I is connected to the outlet end of the heat exchanger, and an outlet end of the heat exchange tube bundle II is connected to the air heat exchanger.
The device for absorbing heat comprises a decomposing furnace, a tertiary air pipe and a kiln head cover.
The air heat exchanger is arranged on a wind supply pipeline of a kiln head combustor of the cement kiln and an inlet pipeline of the decomposing furnace (the outlet of the fan is arranged in the middle of the pipeline of the combustor). The high-temperature heat conducting oil in the coal saving device transfers heat to the air through the air heat exchanger, so that the air temperature in the air supply pipeline is increased, the pulverized coal is combusted more fully, the heat efficiency is improved, and the coal consumption is reduced. The air temperature can be increased to above 150 ℃.
And a heat exchanger is additionally arranged outside the kiln head of the cement kiln and the coal powder inlet pipeline of the decomposing furnace, and high-temperature heat conduction oil in the coal saving device transfers heat to coal powder through the heat exchanger I, so that the temperature of the coal powder is increased, the coal powder is fully combusted, and the coal consumption is reduced. The coal powder temperature at the inlet is increased to more than 150 ℃.
The heat conducting oil coil pipe is welded on the outer surface of the heat absorber to be heated through channel steel or a pipe. The channel steel or the pipe is longitudinally or circumferentially arranged. There is no requirement for a longitudinal or circumferential arrangement, and depending on the configuration of the field device, either a longitudinal or circumferential arrangement or a combination of both may be used.
The heat-conducting oil is filled in the heat-conducting oil tank and the heat-exchanging tube bundle in the tank, and the air pipe is arranged on the heat-conducting oil tank. The heat exchange medium in the mud-burned coal-saving device is heat conduction oil, and heat exchange is carried out by using the heat conduction oil. The energy storage heat conduction oil tank with the opening is provided with the vent pipe, and medium in the system has high temperature and low pressure and is safe and reliable to operate. The heat exchange tube bundle in the tank is arranged on the upper side of the energy storage heat conduction oil tank, and the temperature of heat conduction oil on the upper side in the energy storage heat conduction oil tank is higher than that of heat conduction oil on the lower side in general cases.
Embodiment two: as shown in fig. 1-4, the embodiment relates to a coal-saving device for cement firing low-temperature waste heat utilization, and the medium flow in the coal-saving device is as follows: after being pressurized by the circulating oil pump I7, the heat conducting oil in the energy storage heat conducting oil tank 9 is connected with the inlet pipe 2 through the coil oil inlet pipe 6, the heat conducting oil is sent into the heat conducting oil coil pipe 3, the surface waste heat of the decomposing furnace 1-1 or the tertiary air pipe 1-2 or the kiln hood 1-3 is absorbed, after the heat conducting oil in the heat conducting oil disc pipe 3 is heated by the waste heat, the heat conducting oil is sent into the energy storage heat conducting oil tank 9 through the outlet pipe 4 connected with the coil oil outlet pipe 5, the heat conducting oil entering the energy storage heat conducting oil tank 9 heats the heat conducting oil in the heat exchange tube bundle 10 in the tank, and the heated heat conducting oil is sent into the heat exchanger 18 of the coal pipeline 19 and the air heat exchanger 21 of the air pipeline 20 through the heat exchange tube bundle outlet header pipe 11 in the tank, the circulating oil pump II 15, the heat exchange tube bundle outlet branch pipe I16 in the tank, and the heat exchange tube bundle outlet branch II 17 in the tank, so as to heat coal dust and air. The heat conducting oil which heats the coal dust and the air is sent into the heat exchange tube bundle 10 in the tank through the inlet branch pipe I13 of the heat exchange tube bundle in the tank, the inlet branch pipe II 14 of the heat exchange tube bundle in the tank and the inlet main pipe 12 of the heat exchange tube bundle in the tank to be reheated.
Embodiment III: the embodiment relates to a cement firing low-temperature waste heat utilization coal saving device, which comprises the following steps of:
and (3) calculating the coal saving amount of the heated air:
air flow 20000NM 3 And/h, calculating the air temperature according to 150 ℃ and saving coal:
air enthalpy at 30℃39.72KJ/NM 3
150 ℃ air enthalpy 199KJ/NM 3
Air flow 20000NM 3 /h
Recovered heat 20000× (199-39.72) = 3185600KJ/h
29307KJ/Kg of standard coal heat
3185600÷29307＝108.7Kg
The utilization rate is 0.9
Daily coal saving: 108.7X124.0.9.1000=2.9 t/d
Coal saving amount calculation of heating coal powder:
the coal powder amount is 20t/h, the coal powder temperature is calculated according to 150 ℃, and the coal saving amount is as follows:
specific heat capacity of coal 1.09 KJ/(Kg. ℃ C.)
1.09×20000×30＝654000KJ
1.09×20000×150＝3270000KJ
3270000-654000＝2616000KJ
2616000÷29307＝89Kg
The utilization rate is 0.9
Daily coal saving: 89×24 ≡0.9 ≡ 1000=2.4 t/d
Total coal-saving amount of cement-fired coal-saving device:
2.9+2.4＝5.3t/d
in the foregoing, the present utility model is merely preferred embodiments, which are based on different implementations of the overall concept of the utility model, and the protection scope of the utility model is not limited thereto, and any changes or substitutions easily come within the technical scope of the present utility model as those skilled in the art should not fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (6)
1. The coal saving device for low-temperature waste heat utilization in cement firing is characterized by comprising a heat conducting oil coil (3), a coil oil outlet pipeline (5), a coil oil inlet pipeline (6), a circulating oil pump I (7), a liquid level meter (8), an energy storage heat conducting oil tank (9), an in-tank heat exchange tube bundle (10), a heat exchange tube bundle outlet main pipe (11), an in-tank heat exchange tube bundle inlet main pipe (12), an in-tank heat exchange tube bundle inlet branch pipe I (13), an in-tank heat exchange tube bundle inlet branch pipe II (14), a circulating oil pump II (15), an in-tank heat exchange tube bundle outlet branch pipe I (16), an in-tank heat exchange tube bundle outlet branch pipe II (17), a heat exchanger (18), a coal feeding pipeline (19), an air pipeline (20) and an air heat exchanger (21),
the outer surface of the heat absorption device to be heated is provided with a heat conduction oil coil (3), an inlet pipe (2) of the heat conduction oil pan pipe (3) is connected to the outlet end of an energy storage heat conduction oil tank (9) through a coil oil inlet pipeline (6), a circulating oil pump I (7) is arranged on the coil oil inlet pipeline (6), an outlet pipe (1) of the heat conduction oil pan pipe (3) is connected to the inlet end of the energy storage heat conduction oil tank (9) through a coil oil outlet pipeline (5), a liquid level meter (8) and an in-tank heat exchange tube bundle (10) are arranged in the energy storage heat conduction oil tank (9), the outlet end of the in-tank heat exchange tube bundle (10) on the tank body is connected with an in-tank heat exchange tube bundle outlet branch pipe I (16) and an in-tank heat exchange tube bundle outlet branch II (17) through a heat exchange tube bundle outlet header pipe (11), a circulating oil pump II (15) is arranged on the heat exchange tube bundle outlet branch pipe (11), the heat exchange tube outlet pipe I (16) is connected to the inlet end of a heat exchanger (18) on a coal feeding pipeline (19), the in-tank heat exchange tube bundle outlet II (17) is connected to the inlet end of an air heat exchanger (21) on the air pipeline (20), the in-tank inner heat exchange tube bundle outlet end is connected to the inlet end of the heat exchange tube bundle in the tank body through the inlet end of the heat exchange tube bundle inlet pipe (12 in the heat exchange tube bundle inlet pipe II (12) through the inlet pipe I, an in-tank heat exchange tube bundle inlet branch pipe I (13) is connected to the outlet end of the heat exchanger, an in-tank heat exchange tube bundle inlet branch pipe II (14) is connected to the outlet end of the air heat exchanger (21), and an in-tank heat exchange tube bundle inlet branch pipe I (13) is connected to the outlet end of the air heat exchanger (21).
2. The coal saving device for low temperature waste heat utilization of cement burning according to claim 1, wherein the device to be heat absorbed comprises a decomposing furnace (1-1), a tertiary air pipe (1-2) and a kiln head cover (1-3).
3. The coal saving device for cement burning low temperature waste heat utilization according to claim 1, wherein the heat conducting oil pan pipe (3) is welded on the outer surface of the heat absorbing device to be absorbed through channel steel or pipe.
4. A coal saving device for low temperature waste heat utilization of cement burning according to claim 3, wherein the channel steel or the pipe is arranged longitudinally or circumferentially.
5. The coal saving device for cement calcination low temperature waste heat utilization according to claim 1, wherein the energy storage heat conduction oil tank (9) and the heat exchange tube bundle (10) in the tank are filled with heat conduction oil.
6. The coal saving device for cement burning low temperature waste heat utilization according to claim 1, wherein a vent pipe is arranged on the energy storage heat conduction oil tank (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223352744.9U CN219656623U (en) | 2022-12-14 | 2022-12-14 | Coal saving device utilizing low-temperature waste heat of cement firing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223352744.9U CN219656623U (en) | 2022-12-14 | 2022-12-14 | Coal saving device utilizing low-temperature waste heat of cement firing |
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| Publication Number | Publication Date |
|---|---|
| CN219656623U true CN219656623U (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223352744.9U Active CN219656623U (en) | 2022-12-14 | 2022-12-14 | Coal saving device utilizing low-temperature waste heat of cement firing |
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| Country | Link |
|---|---|
| CN (1) | CN219656623U (en) |
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- 2022-12-14 CN CN202223352744.9U patent/CN219656623U/en active Active
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