Improved material drying energy-saving system

Abstract

The utility model relates to the technical field of drying devices, in particular to an improved material drying energy-saving system, which is characterized in that an air inlet, a heat pump system, a drying machine and a spray washer are sequentially arranged on an air circulation pipeline, and air heats materials at the drying machine after being heated by the heat pump system. The spray scrubber and the heat pump system are sequentially arranged on the water circulation pipeline, and after the water exchanges heat with air at the spray scrubber to be heated, the water enters the heat pump to be cooled and then enters the pipeline to be circulated; the air circulation system and the water circulation system which operate independently and have heat exchange interaction are designed, the pollution problem caused by the fact that air carrying dust is directly discharged into the atmosphere is avoided, the temperature of the air subjected to secondary heat exchange is further reduced, the saturation humidity of the air is reduced due to the fact that the temperature is reduced, moisture contained in the air is condensed into condensate water, and the condensate water is recycled. The moisture in the air is reduced, so that the subsequent heating of a heat pump system is easier.

Description

Technical Field

[0001] The utility model relates to the technical field of drying devices, in particular to an improved material drying energy-saving system. Background Art

[0002] The inventor has applied for a utility model for a material drying energy-saving system, in which a solution is for a heat pump system to heat the air. The hot air enters the dryer to heat the material, and then the air is discharged directly. During production, a new problem was discovered: the heat in the air is mainly stored in the moisture therein, that is, dry air is easier to heat than wet air. Traditional air heats the material and then becomes wet air that enters the heat pump system for heating. It is better to directly draw air at normal temperature for heating. The wet air will carry dust after heat exchange contact with the material, and continuous exhaust into the environment will cause dust pollution. Utility Model Content

[0003] Based on the above description, the utility model provides an improved material drying energy-saving system to solve the problems mentioned in the background technology.

[0004] The utility model solves the above technical problems with the following technical solutions: an improved material drying energy-saving system, comprising an air circulation pipeline with a driving member and a water circulation pipeline: the air circulation pipeline is sequentially provided with an air inlet, a heat pump system, a dryer, and a spray scrubber, the air is heated by the heat pump system and then heats the material at the dryer, and then heat-exchanges with water at the spray scrubber before entering the pipeline circulation;

[0005] The water circulation pipeline is sequentially provided with a spray scrubber and a heat pump system. After the water exchanges heat with the air in the spray scrubber and is heated up, it enters the heat pump for heat exchange and cooling and then enters the pipeline for circulation.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, an induced draft fan is provided as a driving component on the air circulation pipeline between the dryer and the spray scrubber.

[0008] Furthermore, a spray water pump is provided as a driving component on the water circulation pipeline between the spray scrubber and the heat pump system.

[0009] Furthermore, a filtering overflow device is provided on the water circulation pipeline between the spray scrubber and the spray water pump.

[0010] Furthermore, an air intake regulating valve is provided on the air intake port.

[0011] Furthermore, an exhaust pipe is provided on the air circulation pipeline between the spray scrubber and the air inlet.

[0012] Furthermore, the air circulation pipeline and the water circulation pipeline are both provided with temperature sensors at the inlet and outlet of the water pump system.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0014] 1. Design two independent air circulation systems and water circulation systems with heat exchange interaction to avoid the pollution problem caused by direct discharge of dust-carrying air into the atmosphere;

[0015] 2. The air temperature after the secondary heat exchange is further reduced, and due to the lower temperature, its saturated humidity is also reduced. The moisture contained in the air condenses into condensed water. The moisture in the air is reduced, making it easier to heat the subsequent heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the principle of an improved material drying energy-saving system provided by an embodiment of the utility model;

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Dryer; 2. Spray water pump; 3. Filter overflow device; 4. Air intake regulating valve; 5. Temperature sensor; 6. induced draft fan; 7. Spray scrubber; 8. Heat pump system; 9. Exhaust pipe. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0021] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0022] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0023] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0024] like Figure 1 An improved material drying energy-saving system shown includes two independent and crossed air circulation systems and water circulation systems. The air circulation system includes an air circulation pipeline with corresponding driving parts, and the water circulation system includes a water circulation pipeline with corresponding driving parts.

[0025] The air circulation pipeline is provided with an air inlet, a heat pump system 8, a dryer 1, and a spray scrubber 7 in sequence. The air is injected into the air circulation pipeline from the air inlet, then enters the dryer 1 through the heat pump system 8, then reaches the spray scrubber 7, and finally reaches the air inlet from the circulation pipeline to complete a cycle. During the process, the air is heated by the heat pump system 8, and then enters the dryer 1 to heat and dry the material, so that the wet material becomes dry material. The air after the initial heat exchange with the material then exchanges heat with the water circulation system again at the spray scrubber 7 for secondary heat exchange to transfer the heat in the air to the water. Finally, the air enters the pipeline circulation again, and is continuously heated by the heat pump system 8, cooled by material exchange, cooled by water exchange, and then enters the heat pump system 8 for heating... A draught fan 6 is provided between the dryer 1 and the spray scrubber 7 on the air circulation pipeline as a driving component.

[0026] The water circulation pipeline is provided with a spray washer 7 and a heat pump system 8 in sequence. After the water is heated up by heat exchange with the air at the spray washer 7, it enters the heat pump for heat exchange and cooling, and then enters the pipeline for circulation after transferring the heat to the heat pump system 8. A spray water pump 2 is provided as a driving component between the spray washer 7 and the heat pump system 8 on the water circulation pipeline.

[0027] The relative humidity of the exhaust gas of the dryer 1 reaches 70-80%, and the heat of the air mainly exists in the water vapor contained therein. Due to the large specific heat capacity of water, wet air at the same temperature is much more difficult to heat than dry air, and the humidity of the air will also increase with the increase of temperature. Therefore, if the air temperature can be reduced as much as possible, the water vapor therein will be condensed into water and separated from the air, and the air will become relatively dry. It will also be easier to heat after entering the heat pump system 8 for circulation, which is conducive to improving the COP value. In the spray scrubber 7, the exhaust gas is cooled to the saturation temperature, the water vapor is condensed into water, and the exhaust gas is indirectly exchanged with the heat pump system 8 to transfer the energy in the heat pump refrigerant to the circulating exhaust gas, and the exhaust gas is reheated to 80℃~120℃. The specific temperature is determined by different refrigerants. Taking R245fa as an example, the gas temperature can be increased to 120℃. The heated gas enters the dryer 1 again to complete a cycle.

[0028] like Figure 1As shown, in one embodiment, the air circulation pipeline and the water circulation pipeline are both provided with temperature sensors 5 at the inlet and outlet of the water pump system. The temperature of the air before entering the heat pump system 8 is 35°C, and after being heated by the heat pump system 8, the temperature is raised to 80°C, and after the first heat exchange with the material in the dryer 1, the temperature is lowered to 50°C, and the air is lowered to 35°C after the second heat exchange with water at the spray washer 7; the temperature of the water after the second heat exchange with the air at the spray washer 7 is 45°C, and the water enters the heat pump system 8 for heat exchange and is lowered to 30°C, and then the 30°C water is circulated to the spray washer 7 for heat exchange with the air and is raised to 45°C, and the cycle continues.

[0029] Specifically, a filter overflow device 3 is provided between the spray scrubber 7 and the spray water pump 2 on the water circulation pipeline, and the water vapor discharged from the dryer 1 will be continuously condensed and discharged out of the system by the filter overflow device 3. An intake regulating valve 4 is provided on the air inlet, and no tail gas is discharged in the exhaust cycle. The intake regulating valve 4 is added to start and adapt to the operation of the equipment under variable working conditions.

[0030] Preferably, an exhaust pipe 9 is provided on the air circulation pipeline between the spray scrubber 7 and the air inlet for discharging useless waste gas. The waste gas will be washed with water when it is continuously exchanged with water, and the dust accompanying the air will be washed away, so that the discharge is pollution-free.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved material drying energy-saving system, characterized in that: Including air circulation pipeline and water circulation pipeline with drive parts: The air circulation pipeline is provided with an air inlet, a heat pump system, a dryer, and a spray scrubber in sequence. The air is heated by the heat pump system and then heats the material in the dryer. Then, the air is heat-exchanged with water in the spray scrubber and then enters the pipeline for circulation. The water circulation pipeline is sequentially provided with a spray scrubber and a heat pump system. After the water exchanges heat with the air in the spray scrubber and is heated up, it enters the heat pump for heat exchange and cooling and then enters the pipeline for circulation.

2. The improved material drying energy-saving system according to claim 1 is characterized in that: An induced draft fan is provided as a driving component on the air circulation pipeline between the dryer and the spray scrubber.

3. The improved material drying energy-saving system according to claim 1 is characterized in that: A spray water pump is provided as a driving component on the water circulation pipeline between the spray scrubber and the heat pump system.

4. The improved material drying energy-saving system according to claim 3 is characterized in that: A filtering overflow device is arranged on the water circulation pipeline between the spray scrubber and the spray water pump.

5. The improved material drying energy-saving system according to claim 1 is characterized in that: An air intake regulating valve is arranged on the air intake port.

6. The improved material drying energy-saving system according to claim 1 is characterized in that: An exhaust pipe is arranged on the air circulation pipeline between the spray scrubber and the air inlet.

7. The improved material drying energy-saving system according to claim 1 is characterized in that: The air circulation pipeline and the water circulation pipeline are both provided with temperature sensors at the inlet and outlet of the water pump system.

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