CN216132257U - Hot air circulation drying system of tunnel kiln - Google Patents
Hot air circulation drying system of tunnel kiln Download PDFInfo
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- CN216132257U CN216132257U CN202121841797.XU CN202121841797U CN216132257U CN 216132257 U CN216132257 U CN 216132257U CN 202121841797 U CN202121841797 U CN 202121841797U CN 216132257 U CN216132257 U CN 216132257U
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Abstract
The utility model discloses a hot air circulation drying system of a tunnel kiln, which comprises a fan, a heater, an air flow pipeline and a condenser, wherein the fan is arranged on the heater; the air outlet and the air inlet of the tunnel kiln are communicated through the air flow pipeline, and the air flow pipeline and the tunnel kiln form a circulating air flow pipeline together, and the circulating air flow pipeline is used for circularly flowing in the tunnel kiln through air flow to dry wet products in the tunnel kiln; along the air flow movement direction, the circulating air flow pipeline is sequentially connected with a condenser, a fan and a heater in series; the condenser is used for condensing and separating moisture in the hot and humid air; the fan is used for driving the air in the circulating airflow pipeline to flow; the heater is used for heating the air in the circulating airflow pipeline. The utility model condenses the damp and hot air exhausted from the air outlet of the tunnel kiln to separate out the moisture in the damp and hot air, and then introduces the moisture into the tunnel kiln again, so that the air is drier, the dry air flow can be recycled, and the energy consumption is saved.
Description
Technical Field
The utility model belongs to the field of manufacturing of refractory fiber boards, and relates to a hot air circulation drying system of a tunnel kiln.
Background
The refractory fiber board is prepared through wet process, which includes mixing chopped or crushed refractory fiber cotton with adhesive, assistant, stuffing, etc. and water to prepare refractory fiber slurry, vacuum filtering the slurry to form fiber board blank, drying and polishing the blank to form the refractory fiber board. The fiber board prepared by the process has the advantages of small volume density, low heat conductivity and the like, and is widely applied to the industries of metallurgy, machinery, electric power and petrochemical industry.
At present, the tunnel kiln hot air drying in the drying process of the refractory fiber board is widely used due to the advantages of small equipment investment, good stability, easy operation and the like. In the common tunnel kiln hot air drying, air is heated and then sent into a kiln body to dry wet products in the kiln body, the dried wet and hot air is discharged as waste gas, then fresh air is supplemented, and the fresh air is sent into the kiln body for use after being heated again. However, the water content of the refractory fiber board blank is high (about 50-60%), the time consumption of hot air drying is long, and in order to ensure the drying quality, the drying time sometimes reaches several days, so that the hot air of the tunnel kiln needs to be heated for a long time, and the energy consumption is high.
Therefore, it is necessary to develop a hot air circulation drying system for tunnel kiln, which can recycle the air flow and save energy consumption.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model provides a hot air circulation drying system of a tunnel kiln, and aims to condense hot and humid air discharged from an air outlet of the tunnel kiln, separate out moisture in the hot and humid air, and introduce the moisture into the tunnel kiln again, so that dry air flow can be recycled, and energy consumption is saved.
In order to achieve the purpose, the utility model provides the following technical scheme:
a hot air circulation drying system of a tunnel kiln comprises a fan, a heater, an air flow pipeline and a condenser;
the air flow pipeline is used for communicating an air outlet and an air inlet of the tunnel kiln and forming a circulating air flow pipeline together with the tunnel kiln, and the circulating air flow pipeline is used for circularly flowing in the tunnel kiln through air flow to dry wet products in the tunnel kiln;
a condenser, a fan and a heater are sequentially connected in series in the circulating airflow pipeline along the airflow movement direction;
the condenser is used for condensing and separating moisture in the hot and humid air by cooling the hot and humid air in the circulating airflow pipeline;
the fan is used for driving the air in the circulating airflow pipeline to flow;
the heater is used for heating air in the circulating airflow pipeline.
The further optimization scheme is that a water outlet is arranged at the bottom of the air flow pipeline behind the condenser along the air flow movement direction in the circulating air flow pipeline and is used for discharging condensed water.
The condenser is of a water cooling jacket structure, the water cooling jacket is a water tank filled with cooling water, and the air flow pipeline penetrates through two sides of the water tank; the water tank is provided with a water inlet and a water outlet, and cooling water flows out of the water outlet after entering the water tank from the water inlet to form circulating cooling water flow.
The further optimization scheme is that the system also comprises a heat exchanger; the heat exchanger is connected in series in the circulating airflow pipeline and is arranged behind the fan and in front of the heater along the airflow movement direction; and a heat exchange pipeline is arranged in the heat exchanger, and hot water flows in the heat exchange pipeline and is used for radiating heat through the pipe wall of the heat exchange pipeline and preheating air entering the tunnel kiln.
The further optimization scheme is that the heat exchange pipeline is communicated with a water outlet of the condenser and used for transferring heated hot water in the condenser to the heat exchanger.
The further optimization scheme is that the air flow pipeline penetrating through the condenser is of a plurality of thin pipe structures, the two ends of each thin pipe are communicated with the air flow pipeline, and the thin pipes are used for increasing the cooling efficiency of the damp and hot air by enlarging the heat dissipation area.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model carries out condensation treatment on the damp and hot air discharged from the air outlet of the tunnel kiln to separate out moisture in the damp and hot air, and then introduces the moisture into the tunnel kiln again, thereby forming a circulating drying airflow, and the moisture in the airflow is continuously condensed and separated, so that the moisture contained in the airflow entering the tunnel kiln is reduced, thereby improving the drying efficiency, shortening the drying time and reducing the energy consumption.
Drawings
Fig. 1 is a schematic view of a piping connection structure according to embodiment 1 of the present invention;
fig. 2 is a schematic view of a pipe connection structure according to embodiment 2 of the present invention.
In the figure: 1, a fan, 2 a heater, 3 an airflow pipeline, 32 a water outlet, 33 thin pipes, 4 condensers, 41 a water inlet, 42 a water outlet, 5 a heat exchanger, 51 a heat exchange pipeline, 6 a tunnel kiln, 61 an air inlet and 62 an air outlet; the arrows in the figure indicate the direction of movement of the air flow.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings of the present invention, and it is obvious that the described embodiments are only a part of the preferred embodiments of the present invention, and not all embodiments. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1: please refer to fig. 1;
the utility model provides the following technical scheme: a hot air circulation drying system of a tunnel kiln comprises a fan 1, a heater 2, an air flow pipeline 3 and a condenser 4;
the air flow pipeline 3 is used for communicating an air outlet 62 and an air inlet 61 of the tunnel kiln and forming a circulating air flow pipeline 31 (not shown in the figure) together with the tunnel kiln 6, and the circulating air flow pipeline 31 is used for drying wet products in the tunnel kiln 6 through air flow in a circulating mode;
the condenser 4, the fan 1 and the heater 2 are sequentially connected in series in the circulating airflow pipeline 31 along the airflow movement direction; along the moving direction of the air flow, the bottom of the air flow pipeline 3 behind the condenser 4 is provided with a water outlet 32, and the water outlet 32 is used for discharging condensed water;
the fan 1 is used for driving the air in the circulating airflow pipeline 31 to flow;
the heater 2 is used for heating the air in the circulating airflow pipeline 31;
the condenser 4 is of a water-cooling jacket structure, the water-cooling jacket is a water tank filled with cooling water, and the air flow pipeline 3 penetrates through two sides of the water tank; for condensing and separating moisture in the hot and humid air by cooling the hot and humid air in the circulation airflow line 31; the water tank is provided with a water inlet 41 and a water outlet 42, and cooling water flows out of the water outlet 42 after entering the water tank from the water inlet 41, so that circulating cooling water flow is formed. Airflow pipeline 3 in the water tank is a plurality of tubules 33 structures, the both ends of tubule all communicate with airflow pipeline 3, tubule 33 is used for through expanding heat radiating area for the cooling efficiency of damp and hot air.
The working principle is as follows: the hot and humid air from the air outlet 62 is cooled by the cooling water in the condenser 4, so that the temperature of the air is reduced, and the moisture in the air is condensed and separated out by the supersaturated air; so that the air passing through the condenser 4 has a reduced temperature but a reduced humidity, and the air re-entering the tunnel kiln 6 through the air inlet 61 is drier than the air flowing out of the air outlet 62; the circulating air flow is heated by the heater 2 before entering the air inlet 61, so that the air entering the tunnel kiln 6 is dry and high in temperature, the air continuously and circularly flows under the action of the circulating air flow pipeline 31, and the dry and high-temperature air continuously flows through wet products in the tunnel kiln 6, so that the continuous drying effect is achieved.
It should be noted that: the temperature of the cooling water is certainly far lower than the temperature of the air flowing out of the air outlet 62, and the cooling water used in the embodiment is 25 ℃. Usually, the drying temperature of the tunnel kiln 6 is above 100 ℃, and the tunnel kiln 6 of the present embodiment is provided with a heating device, so that the kiln body can be heated when the drying temperature is less than 100 ℃, and the air flowing out from the air outlet 62 is always humid and hot air.
When in use, after the wet product is sent into the tunnel kiln 6, the kiln door is closed; the fan and the heater are started, so that air flow enters from the air inlet 61 of the tunnel kiln 6 and flows out from the air outlet 62, and the dry and high-temperature air continuously flows through wet products of the tunnel kiln 6, thereby achieving the effect of continuous drying.
The advantage of this embodiment lies in, compare with prior art new trend heating, though all heat the air that gets into kiln body 6, but this embodiment heating is the lower air of humidity after the drying, compares with the higher air of humidity of prior art heating new trend, and even if the temperature of the air after the heating is the same, but humidity is different, and the air after the heating of this embodiment is more dry, therefore the air drying effect of dry high temperature has apparent progress than prior art new trend heating. Under the action of the circulating air flow pipeline 31, no new air enters the circulating system, and only the air in the circulating air flow pipeline 31 flows, so that the air flow entering the air inlet 61 is more and more dried, the drying effect is improved, and the drying time is shortened; due to the shortened drying time, the time for heating the air is also shortened, thereby reducing the energy consumption.
Example 2: please refer to fig. 2;
a tunnel kiln hot air circulation drying system is different from the embodiment 1 in that:
also comprises a heat exchanger 5; the heat exchanger 5 is connected in series in the circulating airflow pipeline 31 and is arranged behind the fan 1 and in front of the heater 2 along the airflow movement direction; a heat exchange pipeline 51 is arranged in the heat exchanger 5, and hot water flows in the heat exchange pipeline 51 and is used for radiating heat through the pipe wall of the heat exchange pipeline 51 and preheating air entering the tunnel kiln;
the heat exchange pipe 51 is communicated with the water outlet 42 of the condenser 4 for transferring the heated hot water in the condenser 4 to the heat exchanger 5.
This example was used in the same manner as example 1 except that a heat exchanger 5 communicating with a condenser 4 was additionally provided. The condenser 4 and the circulating airflow pipeline 31 which are the same as those in embodiment 1 are provided, so that the present embodiment can reuse the heat of the air in the circulating airflow pipeline 31 after being radiated by the condenser 4 while having the same drying effect as that in embodiment 1, thereby further increasing the intake air temperature of the air inlet 61, reducing the heating time and saving energy.
The heat exchanger 5 operates on the principle that the heat exchange duct 51 meanders in the heat exchanger 5, and serves to enlarge the heat radiation area and promote heat exchange between the duct wall and the air flow in the circulating air flow duct 31. The heat of the hot water in the heat exchange pipe 51 is transferred to the pipe wall, and the air flow blows through the zigzag heat exchange pipe 51 and transfers the heat to the air flow, thereby playing a role of preheating the air. The preheated air is heated by the heater 2, so that the working time of the heater 2 can be reduced, and the energy is saved.
It should be noted that the hot water of the heat exchanger 5 of the present embodiment is derived from the water outlet 42 of the condenser 4, and the temperature of the hot water coming out of the water outlet 42 is about 50 ℃. The temperature of the air from the condenser 4 of the air flow pipeline 3 is basically consistent with the temperature of the water outlet 42, but the air flow pipeline 3 is much thicker than a water pipe communicated with the water outlet 42, and the heat dissipation area is much larger, so that the heat dissipation of the air flow pipeline 3 is faster, the length of the tunnel kiln 6 is longer, the heat exchanger 5 is arranged at a position close to the air inlet 61, the heat dissipation time of the air flow pipeline 3 is longer, when the air flow reaches the heat exchanger 5, the temperature of the air flow is lower than the temperature of hot water in the heat exchange pipeline 51, and the temperature difference exists between the air temperature and the hot water temperature, so that the heat exchange can be carried out. Even if the temperature difference is not large, the temperature of the air passing through the heat exchanger 5 is not improved much, but no new energy is consumed after all, and only the heat dissipated by the condenser 4 is reused, so that the energy consumption required by the embodiment is less than that required by the embodiment 1, and the energy is saved more.
The utility model is not described in detail in the prior art; for a person skilled in the art, various technical features of the embodiments described above may be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations should be considered as the scope of the present description. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a tunnel cave heated air circulation drying system which characterized in that: comprises a fan (1), a heater (2), an airflow pipeline (3) and a condenser (4);
the air flow pipeline (3) is used for communicating an air outlet and an air inlet of the tunnel kiln and forming a circulating air flow pipeline (31) together with the tunnel kiln, and the circulating air flow pipeline (31) is used for circularly flowing in the tunnel kiln through air flow to dry wet products in the tunnel kiln;
a condenser (4), a fan (1) and a heater (2) are sequentially connected in series in the circulating airflow pipeline (31) outside the tunnel kiln along the airflow movement direction;
the condenser (4) is used for condensing and separating moisture in the hot and humid air by cooling the hot and humid air in the circulating airflow pipeline (31);
the fan (1) is used for driving air in the circulating airflow pipeline (31) to flow;
the heater (2) is used for increasing the temperature of air entering the tunnel kiln by heating the air in the circulating airflow pipeline (31).
2. The tunnel kiln hot air circulation drying system according to claim 1, characterized in that: and a water outlet (32) is arranged at the bottom of the air flow pipeline (3) behind the condenser (4) in the circulating air flow pipeline (31) along the air flow movement direction, and the water outlet (32) is used for discharging condensed water.
3. The tunnel kiln hot air circulation drying system according to claim 1, characterized in that: the condenser (4) is of a water-cooling sleeve structure; the water cooling jacket structure comprises a water tank filled with cooling water inside and the air flow pipeline (3) penetrating through the water tank; the water tank is provided with a water inlet (41) and a water outlet (42) and used for enabling cooling water to flow out of the water outlet (42) after entering the water tank from the water inlet (41) to form circulating cooling water flow.
4. The tunnel kiln hot air circulation drying system according to claim 3, characterized in that: also comprises a heat exchanger (5); the heat exchanger (5) is connected in series in the circulating airflow pipeline (31) and is arranged behind the fan (1) and in front of the heater (2) along the airflow movement direction; a heat exchange pipeline (51) is arranged in the heat exchanger (5), hot water flows in the heat exchange pipeline (51), and the heat exchanger (5) is used for radiating heat through the pipe wall of the heat exchange pipeline (51) and preheating air entering the tunnel kiln.
5. The tunnel kiln hot air circulation drying system according to claim 4, characterized in that: the heat exchange pipeline (51) is communicated with the water outlet (42) of the condenser (4) and is used for transferring the heated hot water in the condenser (4) to the heat exchanger (5).
6. The tunnel kiln hot air circulation drying system according to claim 3, characterized in that: airflow pipeline (3) in condenser (4) are a plurality of tubule (33) structures side by side, and tubule (33) are arranged in through enlarging heat radiating area for the cooling efficiency of damp and hot air in airflow pipeline (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121841797.XU CN216132257U (en) | 2021-08-06 | 2021-08-06 | Hot air circulation drying system of tunnel kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121841797.XU CN216132257U (en) | 2021-08-06 | 2021-08-06 | Hot air circulation drying system of tunnel kiln |
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| CN216132257U true CN216132257U (en) | 2022-03-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371379A (en) * | 2022-08-16 | 2022-11-22 | 安徽麦稻之星机械科技有限公司 | Circulating heat source supply system for drying steamed rice |
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2021
- 2021-08-06 CN CN202121841797.XU patent/CN216132257U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371379A (en) * | 2022-08-16 | 2022-11-22 | 安徽麦稻之星机械科技有限公司 | Circulating heat source supply system for drying steamed rice |
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