阅读说明：本技术 一种热风干燥系统 (Hot air drying system ) 是由 李志雄 黄明杨 徐阳 牟康伟 王博 高方圆 刘承泽 刘希豪 田哲 于 2019-11-20 设计创作，主要内容包括：本发明提供一种热风干燥系统,包括干燥室,干燥室的排风口与进风口之间通过尾气管路连通,在该尾气管路上依次安装有换热器、热泵蒸发器、冷凝器,在热泵蒸发器、冷凝器之间设置有热泵机组,在热泵蒸发器、冷凝器之间串联连接有一组深度除湿装置,该深度除湿装置能够实现循环除湿和再生,使得从热泵蒸发器排出的湿热空气能够不间断得进行除湿操作。本发明提供的热风干燥系统,通过能够实现循环除湿和再生的深度除湿装置,将干燥室排出的尾气能够在原有设备的基础上进一步除湿,从而使得除湿更加彻底,使得进入干燥室的热空气湿度与干燥室内湿度差别明显,因此,提高了干燥室回收余热的效率。(The invention provides a hot air drying system, which comprises a drying chamber, wherein an air outlet and an air inlet of the drying chamber are communicated through a tail gas pipeline, a heat exchanger, a heat pump evaporator and a condenser are sequentially arranged on the tail gas pipeline, a heat pump unit is arranged between the heat pump evaporator and the condenser, a group of deep dehumidifying devices are connected in series between the heat pump evaporator and the condenser, the deep dehumidifying devices can realize circulating dehumidification and regeneration, and the humid and hot air discharged from the heat pump evaporator can be subjected to dehumidifying operation uninterruptedly. According to the hot air drying system provided by the invention, the tail gas exhausted from the drying chamber can be further dehumidified on the basis of the original equipment through the deep dehumidifying device capable of realizing circulating dehumidification and regeneration, so that the dehumidification is more thorough, the difference between the humidity of the hot air entering the drying chamber and the humidity in the drying chamber is obvious, and the efficiency of recovering waste heat in the drying chamber is improved.)

1. The utility model provides a hot air drying system, including drying chamber (23), communicate through tail gas pipeline (24) between the air exit of drying chamber (23) and the air intake, install heat exchanger (21) in proper order on this tail gas pipeline (24), heat pump evaporator (20), condenser (19), at heat pump evaporator (20), be provided with heat pump set (17) between condenser (19), a serial connection has a set of degree of depth dehydrating unit between heat pump evaporator (20), condenser (19), this degree of depth dehydrating unit can realize circulation dehumidification and regeneration, make the wet hot-air of following heat pump evaporator (20) exhaust can incessant must carry out dehumidification operation.

2. The hot air drying system according to claim 1, wherein the deep dehumidifying device comprises two silica gel dehumidifying/regenerating chambers which are connected in parallel and have the same structure, namely a first silica gel dehumidifying/regenerating chamber (5) and a second silica gel dehumidifying/regenerating chamber (6); silica gel is filled in the first silica gel dehumidification/regeneration chamber (5) and the first silica gel dehumidification/regeneration chamber (6);

a first heat exchange pipe (7) is arranged in the first silica gel dehumidification/regeneration chamber (5), and a first exhaust hole (9) for exhausting internal moisture is arranged on the first silica gel dehumidification/regeneration chamber (5); a second heat exchange pipe (8) is arranged in the second silica gel dehumidification/regeneration chamber (6), and a second exhaust hole (10) for exhausting internal moisture is arranged on the second silica gel dehumidification/regeneration chamber (6);

the two parallel first heat exchange tubes (7) and the second heat exchange tubes (8) are connected in series with the heating device through the air pipeline (25) so as to heat the first heat exchange tubes (7) and the second heat exchange tubes (8) to remove moisture in the silica gel.

3. The hot air drying system according to claim 2, wherein the heating device is a solar air collector (1), and the inlet and the outlet of the solar air collector (1) are connected in series with the two parallel first heat exchange tubes (7) and the second heat exchange tubes (8) through an air pipeline (25).

4. A hot air drying system according to claim 2, wherein a heat storage tank (2) is connected in series with the air pipeline (25), and the heat storage tank (2) is filled with the heat storage material (3).

5. A hot air drying system according to claim 4, wherein heat pipes (4) are distributed in the heat storage tank (2), the evaporation sections of the heat pipes (4) are located in the heat storage tank (2), and the condensation sections are located outside the heat storage tank (2).

6. A hot air drying system according to claim 5, wherein the condenser section is arranged in the exhaust gas duct (24) for reheating the dehumidified exhaust gas.

7. A hot air drying system according to any of claims 1 to 6, characterized in that an auxiliary heater (22) is arranged in the exhaust line (24) between the air inlet of the drying chamber (23) and the condenser (19).

8. The hot air drying system according to claims 2-6, wherein the silica gel filled in the first silica gel dehumidifying/regenerating chamber (5) and the first silica gel dehumidifying/regenerating chamber (6) is porous silica gel.

9. A hot air drying system according to any of the claims 2-6, wherein the first heat exchanging pipe (7) and the second heat exchanging pipe (8) are serpentine pipes.

10. The hot air drying system according to claim 4, wherein the heat storage material (3) in the heat storage tank (2) is paraffin, and the paraffin is in a glass bottle packaging form.

Technical Field

The invention relates to the technical field of machinery, in particular to a hot air drying system.

Background

In the existing drying system, the tail gas of the drying chamber contains a large amount of water vapor, most of the tail gas is directly discharged into the atmosphere, and the waste heat in the tail gas is wasted. In order to utilize this portion of the waste heat, the tail gas must be dehumidified. Most of the existing systems adopt a dehumidification mode, when wet air coming out of a drying chamber passes through an evaporator, water vapor is separated out along with the reduction of the air temperature below the dew point temperature. And (4) the dry air tail gas after the water vapor is removed passes through a condenser of a heat pump or a heater of a traditional energy source, and is sent into a drying chamber for continuous material drying after being heated. However, the dehumidification effect is not complete in a high humidity dry environment, and although a large amount of waste heat in the tail gas is recovered by using the heat pump technology, a large amount of moisture still exists in the gas passing through the evaporator. Especially, in the later stage of drying, the humidity in the drying chamber is relatively low, and because the dehumidification is not thorough, the humidity of the hot air entering the drying chamber again is equal to that in the drying chamber, and the aim of dehumidifying to recover waste heat is difficult to achieve. The heat pump dehumidification also can invisibly increase drying time and even can increase drying energy consumption, so that the existing single heat pump dehumidification can not meet the dehumidification work at the later stage of high humidity and dehumidification.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a hot air drying system with the functions of dehumidification and reuse of waste humid and hot air and multi-mode dehumidification.

The utility model provides a hot air drying system, including the drying chamber, communicate through the tail gas pipeline between the air exit of drying chamber and the air intake, install the heat exchanger on this tail gas pipeline in proper order, the heat pump evaporimeter, the condenser, at the heat pump evaporimeter, be provided with heat pump set between the condenser, at the heat pump evaporimeter, series connection has a set of degree of depth dehydrating unit between the condenser, this degree of depth dehydrating unit can realize circulation dehumidification and regeneration, make and can incessantly obtain the dehumidification operation from heat pump evaporimeter exhaust damp and hot air.

Further, in the hot air drying system, the deep dehumidifying device comprises two silica gel dehumidifying/regenerating chambers which are connected in parallel and have the same structure, namely a first silica gel dehumidifying/regenerating chamber and a second silica gel dehumidifying/regenerating chamber; silica gel is filled in the first silica gel dehumidification/regeneration chamber and the first silica gel dehumidification/regeneration chamber;

a first heat exchange tube is arranged in the first silica gel dehumidification/regeneration chamber, and a first exhaust hole for exhausting internal moisture is arranged on the first silica gel dehumidification/regeneration chamber; a second heat exchange tube is arranged in the second silica gel dehumidification/regeneration chamber, and a second exhaust hole for exhausting moisture in the second silica gel dehumidification/regeneration chamber is formed in the second silica gel dehumidification/regeneration chamber;

the two parallel first heat exchange tubes and the second heat exchange tubes are connected in series with the heating device through air pipelines so as to heat the first heat exchange tubes and the second heat exchange tubes to remove moisture in the silica gel.

Further, in the hot air drying system, the heating device is a solar air heat collector, and an inlet and an outlet of the solar air heat collector are connected in series with the two parallel first heat exchange tubes and the second heat exchange tubes through air pipelines.

Further, in the hot air drying system, the air pipeline is also connected in series with a heat storage tank, and the heat storage tank is filled with a heat storage material.

Further, in the hot air drying system, heat pipes are distributed in the heat storage tank, evaporation sections of the heat pipes are located in the heat storage tank, and condensation sections of the heat pipes are located outside the heat storage tank.

Further, in the hot air drying system, the condensing section is disposed in the tail gas pipeline and is used for reheating the dehumidified tail gas.

Furthermore, in the hot air drying system, an auxiliary heater is further arranged on a tail gas pipeline between the air inlet of the drying chamber and the condenser.

Further, as above mentioned hot air drying system, the silica gel filled in the first silica gel dehumidification/regeneration chamber and the first silica gel dehumidification/regeneration chamber is porous silica gel.

Further, in the hot air drying system, the first heat exchange tube and the second heat exchange tube are coil tubes.

Further, in the hot air drying system, the heat storage material in the heat storage tank is paraffin, and the paraffin is in a glass bottle packaging form.

According to the hot air drying system provided by the invention, the tail gas exhausted from the drying chamber can be further dehumidified on the basis of the original equipment through the deep dehumidifying device capable of realizing circulating dehumidification and regeneration, so that the dehumidification is more thorough, the difference between the humidity of the hot air entering the drying chamber and the humidity in the drying chamber is obvious, and the efficiency of recovering waste heat in the drying chamber is improved.

Drawings

FIG. 1 is a schematic structural view of a hot air drying system according to the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.