Drying system

Abstract

The utility model discloses a drying system which solves the technical problem that gas exhausted by an existing protein powder production line still contains much protein powder dust. The drying system comprises an air feeder, a first heating system, a drying tower, a separation system, an induced draft fan, a spraying device and a dehumidification heating system which are connected in sequence; the dehumidifying and heating system comprises a box body and a filtering mechanism, a condensing mechanism and a heating mechanism which are sequentially arranged in the box body in the length direction of the box body, a second air inlet and a second air outlet are formed in the two ends of the box body in the length direction respectively, and a second water outlet through which condensed water flows out is formed in the box body; and the second air outlet is communicated with an air inlet of the air feeder. The device can reduce discharge of protein powder dust and reduce pollution.

Description

Technical Field

[0001] This application belongs to the technical field of protein powder processing equipment, specifically relating to a drying system. Background Technology

[0002] The production of protein powder will generate exhaust gas containing protein dust. Even after passing through filtration systems such as cyclone separators and bag filters, it is still impossible to efficiently filter out all the protein dust in the exhaust gas. Direct discharge into the atmosphere will cause environmental pollution problems, and the odor is obvious, which can easily affect the surrounding air quality. Summary of the Invention

[0003] To address the technical problem that the exhaust gas from current protein powder production lines still contains a significant amount of protein powder dust, this application provides a drying system.

[0004] In a first aspect of this application, a drying system is provided, comprising a blower, a first heating system, a drying tower, a separation system, an induced draft fan, a spray device, and a dehumidification and heating system connected in sequence.

[0005] The dehumidification and heating system includes a housing and a filter mechanism, a condensation mechanism, and a heating mechanism arranged sequentially within the housing along its length. The housing has a second air inlet and a second air outlet at both ends along its length. The housing also has a second water outlet for condensate to flow out, and the second air outlet is connected to the air inlet of the blower.

[0006] In some embodiments, the spraying device has a first air inlet, a first air outlet, a first water inlet, and a first water outlet; the first air inlet is connected to the air outlet of the induced draft fan, and the first air outlet is connected to the second air inlet; the first water inlet is connected to a water storage mechanism, and the first water inlet is also connected to the second water outlet.

[0007] In some embodiments, the condensation mechanism includes a second water inlet pipe, a second drain pipe, and a plurality of condensation pipes, wherein the plurality of condensation pipes are connected in parallel and respectively connected to the second water inlet pipe and the second drain pipe, and the second water inlet pipe is connected to a condensate storage mechanism.

[0008] In some embodiments, a plurality of the condenser tubes are spaced apart along the length of the housing.

[0009] In some embodiments, the heating mechanism includes a heating evaporator, a heating pump, and a heating condenser connected in a passage, wherein the heating evaporator is disposed within the housing near the second air inlet, and the heating condenser is disposed within the housing near the second air outlet.

[0010] In some embodiments, the dehumidification heating system has at least two heating mechanisms, the heating evaporators of the at least two heating mechanisms are arranged sequentially along the length of the housing, and the heating condensers of the at least two heating mechanisms are arranged sequentially along the length of the housing.

[0011] In some embodiments, the dehumidification and heating system further includes a heat exchange mechanism, which includes a heat exchange evaporator, a heat exchange pump, and a heat exchange condenser connected in a passage. The heat exchange evaporator is located inside the housing near the second air inlet, and the heat exchange condenser is located inside the housing near the second air outlet.

[0012] In some embodiments, the heat exchange evaporator is disposed between the filtration mechanism and the condensation mechanism.

[0013] In some embodiments, the heat exchange condenser is disposed between the heating evaporator and the heating condenser.

[0014] In some embodiments, the first heating system includes a primary steam heating system and a secondary hot air furnace heating system connected in series. The air inlet of the primary steam heating system is connected to the air outlet of the blower, and the secondary hot air furnace heating system is connected to the air inlet of the drying tower. The separation system includes a cyclone separator and a bag filter connected in series. The air inlet of the cyclone separator is connected to the air outlet of the drying tower, and the air outlet of the bag filter is connected to the air inlet of the induced draft fan.

[0015] The protein powder drying system provided according to one or more embodiments of this application removes most of the protein powder dust from the air discharged from the drying tower through a spray device and a dehumidification and heating system. The removal rate is high, and the removed protein powder dust is adsorbed in water, so there is no dust. The treated air will re-enter the drying tower and will not be discharged into the atmosphere, so it is not likely to cause environmental pollution problems and has little impact on the air around the factory area. Attached Figure Description

[0016] Figure 1 A schematic diagram of the drying system in one or more embodiments of this application is shown.

[0017] Figure 2 A schematic diagram of the dehumidification heating system in one or more embodiments of this application is shown.

[0018] Explanation of reference numerals in the attached drawings: 100-blowing fan, 210-primary steam heating system, 220-secondary hot air furnace heating system, 300-drying tower, 400-separation system, 410-cyclone separator, 420-bag filter, 500-induced draft fan, 600-spraying device, 700-dehumidification heating system, 710-filtration mechanism, 720-condensation mechanism, 721-second water inlet pipe, 722-drain pipe, 723-condensation pipe, 724-condensate storage mechanism, 730-heating mechanism, 731-heating evaporator, 732-heating pump, 733-heating condenser, 734-expansion valve, 740-heat exchange mechanism, 741-heat exchange evaporator, 742-heat exchange pump, 743-heat exchange condenser. Detailed Implementation

[0019] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] Please see Figure 1 and Figure 2 According to a first aspect of this application, a drying system is provided, comprising a blower 100, a first heating system, a drying tower 300, a separation system 400, an induced draft fan 500, a spray device 600, and a dehumidification and heating system 700 connected in sequence.

[0021] The drying tower 300 is the basic component for drying protein powder, with an inlet for material entry and an outlet for protein powder exit. The blower 100 and induced draft fan 500 are the basic components for driving gas flow within the drying system. The first heating system is used to heat the gas discharged from the blower 100 so that the heated gas can smoothly dry the protein powder after entering the drying tower 300, i.e., drying the protein powder by hot air. The dried protein powder falls under the action of gravity, while the gas enters the separation system 400. The separation system 400 is used to filter the protein powder in the gas, which can not only reduce the protein powder dust content in the gas, but also recover the protein powder and increase the output.

[0022] The air inlet of the spray device 600 is connected to the air outlet of the induced draft fan 500. That is, after the air enters the spray device 600, the water mist sprayed by the spray device 600 will adsorb the protein powder dust in the air, thereby reducing the protein powder dust content in the air. The water that has adsorbed the protein powder dust will be collected at the bottom of the spray device 600 and subjected to unified deodorization treatment.

[0023] The dehumidification and heating system 700 includes a housing and a filter mechanism 710, a condenser mechanism 720, and a heating mechanism 730 arranged sequentially along the length of the housing. The housing is a columnar structure with a relatively long length to accommodate the filter mechanism 710, the condenser mechanism 720, and the heating mechanism 730. A second air inlet and a second air outlet are respectively provided at both ends along the length of the housing. A second water outlet for condensate to flow out is provided inside the housing. The second air outlet is connected to the air inlet of the blower 100.

[0024] The filter mechanism 710 effectively blocks protein powder clumps that accumulate due to moisture in the spray device 600. At this time, the air entering the chamber has a high temperature and humidity. Upon contact with the condenser mechanism 720, the moisture in the air condenses on the condenser mechanism 720, thereby reducing the air humidity. Correspondingly, the protein powder dust adsorbed by the moisture also condenses on the condenser mechanism 720, further reducing the protein powder content in the air. The heating mechanism 730 is used to preheat the air. The preheated air, after being blown by the fan 100, re-enters the first heating system for further heating before re-entering the protein powder drying process.

[0025] Understandably, this application removes most of the protein powder dust from the air discharged from the drying tower 300 through the spray device 600 and the dehumidification and heating system 700. The removal rate is high, and the removed protein powder dust is adsorbed in the water, so there is no dust phenomenon. Moreover, the treated air will re-enter the drying tower 300 through the blower 100, the first heating system, and other mechanisms, and will not be discharged into the atmosphere, so it is not likely to cause environmental pollution problems and has little impact on the air around the factory area.

[0026] In some embodiments, the spray device 600 has a first air inlet, a first air outlet, a first water inlet, and a first water outlet; the first air inlet is connected to the air outlet of the induced draft fan 500, and the first air outlet is connected to a second air inlet; the first water inlet is connected to a water storage mechanism, that is, water enters the spray device 600 through the water storage mechanism; the first water inlet is also connected to a second water outlet, that is, condensate from the dehumidification and heating system 700 is discharged through the second water outlet and then enters the spray device 600 through the first water inlet for reuse, thus saving water. The first water inlet can be connected to the second water inlet through the water storage mechanism. In some embodiments, the first water outlet is connected to a water storage mechanism, allowing operators to periodically clean the water containing protein powder dust adsorbed in the water storage mechanism.

[0027] In some embodiments, the first air inlet of the spray device 600 may be higher than the first air outlet, and the air discharged from the blower 500 also has a higher height. After entering the spray device 600, the hotter air rises, comes into contact with the water mist and its temperature drops, and then the air falls back to the air outlet. This increases the path of the air within the spray device 600, which can increase the processing time of the air by the spray device 600 and increase the removal rate of protein powder dust in the air.

[0028] In some embodiments, the condensation mechanism 720 includes a second water inlet pipe 721, a second drain pipe 722, and a plurality of condenser pipes 723. The plurality of condenser pipes 723 are connected in parallel and are respectively connected to the second water inlet pipe 721 and the second drain pipe 722. The second water inlet pipe 721 is connected to a condensate storage mechanism 724. By providing a plurality of condenser pipes 723, the contact area between air and the condensation mechanism 720 is increased, thereby improving the air handling efficiency of the condensation mechanism 720. The shape of the condenser pipes 723 can be a bent pipe or other shape that can increase the length of the condenser pipes 723.

[0029] In some embodiments, multiple condenser tubes 723 are spaced apart along the length of the housing. It is understood that after air enters the housing through the second air inlet, it passes through multiple condenser tubes 723 sequentially, increasing the probability that moisture in the air condenses on the condenser tubes 723 upon cooling, thus improving the condensation efficiency of the condensation mechanism 720, correspondingly reducing the moisture content in the air, and simultaneously lowering the air temperature.

[0030] In some embodiments, the heating mechanism 730 includes a heating evaporator 731, a heating pump 732, and a heating condenser 733 connected in a passage. The heating evaporator 731 is disposed in the housing near the second air inlet, and the heating condenser 733 is disposed in the housing near the second air outlet.

[0031] The heating evaporator 731 is an evaporator that absorbs and removes heat from the surrounding environment, causing the liquid refrigerant to evaporate into a gaseous state under low pressure, thereby lowering the temperature of the object being cooled. The heating condenser 733 is a condenser that converts gas or vapor into liquid to release heat. The heating pump 732 is a liquid pump that enables the heat exchange medium in the heating mechanism 730 to circulate between the heating evaporator 731 and the heating condenser 733. Of course, in some embodiments, an expansion valve 734 may also be provided between the heating condenser 733 and the heating evaporator 731. It is understood that the heating evaporator 731 is located in the housing near the second air inlet. Therefore, the air discharged from the second air inlet will come into contact with the heating evaporator 731 and release heat. The medium inside the heating evaporator 731 will absorb the heat transferred from the air to the outer shell of the heating evaporator 731 and flow to the heating condenser 733 under the action of the heating pump 732 to release heat. To a certain extent, moisture in the air will also be able to condense on the outer shell of the heating evaporator 731 and eventually fall to the bottom of the chamber. That is, the heating evaporator 731 of the heating mechanism 730 can further improve the dehumidification effect of the various mechanisms in the chamber.

[0032] In some embodiments, the dehumidification heating system 700 has at least two heating mechanisms 730. The heating evaporators 731 of the at least two heating mechanisms 730 are arranged sequentially along the length of the housing, and the heating condensers 733 of the at least two heating mechanisms 730 are arranged sequentially along the length of the housing. By setting multiple heating mechanisms 730, the contact time between the air and the heating evaporators 731 is increased, thereby further improving the dehumidification effect. The heat released during the condensation process is also used to preheat the air, which facilitates rapid heating of the air after it is discharged from the housing and re-enters the first heating system through the blower 100, reducing energy consumption or improving the heating efficiency of the air in the first heating system.

[0033] In some embodiments, the heating evaporators 731 and heating condensers 733 of the multiple heating mechanisms 730 are symmetrical along the same vertical plane. It is understood that the closer the heating evaporator 731 of a heating mechanism 730 is to the second air inlet, the closer the heating condenser 733 of that heating structure is to the second air outlet. The closer the heating evaporator 731 is to the second air inlet, the more heat it can absorb, and the more heat the heating condenser 733 connected to it can release. The symmetry of the heating evaporators 731 and heating condensers 733 of the multiple heating mechanisms 730 along the same vertical plane ensures that the temperature of the heating condenser 733 contacted by the air gradually increases during airflow, which is beneficial for the gradual heating of the air and results in higher heat conversion efficiency for the multiple heating mechanisms 730.

[0034] In some embodiments, the dehumidification heating system 700 further includes a heat exchange mechanism 740, which includes a heat exchange evaporator 741, a heat exchange pump 742, and a heat exchange condenser 743 connected in a passage. The heat exchange evaporator 741 is disposed in the housing near the second air inlet, and the heat exchange condenser 743 is disposed in the housing near the second air outlet.

[0035] The heat exchange evaporator 741 is an evaporator that absorbs and removes heat from the surrounding environment, causing the liquid refrigerant to evaporate into a gaseous state under low pressure, thereby lowering the temperature of the object being cooled. The heat exchange condenser 743 is a condenser that converts gas or vapor into liquid to release heat. The heat exchange pump 742 is a liquid pump that enables the heat exchange medium in the heating mechanism 730 to circulate between the heat exchange evaporator 741 and the heat exchange condenser 743. The heat exchange mechanism 740 further absorbs heat from the air that just enters the chamber, and after the condensation mechanism 720 completes the condensation and dehumidification of the air, the air is then heated.

[0036] In some embodiments, the heat exchange evaporator 741 is disposed between the filter mechanism 710 and the condenser mechanism 720 to absorb heat from the air that has just entered the chamber to the greatest extent possible.

[0037] In some embodiments, the heat exchange condenser 743 is disposed between the heating evaporator 731 and the heating condenser 733 to come into contact with the air after it has passed through the condensation mechanism 720 and the heating evaporator 731, so as to promote the air temperature rise.

[0038] In some embodiments, the first heating system includes a primary steam heating system 210 and a secondary hot air furnace heating system 220 connected in series. The air inlet of the primary steam heating system 210 is connected to the air outlet of the blower 100, and the secondary hot air furnace heating system 220 is connected to the air inlet of the drying tower 300. The air is heated by both steam heating and hot air furnace heating. The separation system 400 includes a cyclone separator 410 and a bag filter 420 connected in series. The air inlet of the cyclone separator 410 is connected to the air outlet of the drying tower 300, and the air outlet of the bag filter 420 is connected to the air inlet of the induced draft fan 500. The cyclone separator 410 separates most of the moisture and protein powder dust from the air discharged from the drying tower 300 by centrifugation, while the bag filter 420 separates the air by filtration.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A drying system, characterized in that, It includes a blower, a first heating system, a drying tower, a separation system, an induced draft fan, a spray device, and a dehumidification and heating system connected in sequence; The dehumidification and heating system includes a housing and a filter mechanism, a condensation mechanism, and a heating mechanism arranged sequentially within the housing along its length. The housing has a second air inlet and a second air outlet at both ends along its length. The housing also has a second water outlet for condensate to flow out. The second air outlet is connected to the air inlet of the blower.

2. The drying system according to claim 1, characterized in that, The spraying device has a first air inlet, a first air outlet, a first water inlet, and a first water outlet; the first air inlet is connected to the air outlet of the induced draft fan, and the first air outlet is connected to the second air inlet; The first water inlet is connected to a water storage mechanism, and the first water inlet is also connected to the second water outlet.

3. The drying system according to claim 2, characterized in that, The condensation mechanism includes a second water inlet pipe, a second drain pipe, and multiple condensation pipes. The multiple condensation pipes are connected in parallel and are respectively connected to the second water inlet pipe and the second drain pipe. The second water inlet pipe is connected to a condensate storage mechanism.

4. The drying system according to claim 3, characterized in that, The plurality of condenser tubes are spaced apart along the length of the housing.

5. The drying system according to claim 1, characterized in that, The heating mechanism includes a heating evaporator, a heating pump, and a heating condenser connected in a passage. The heating evaporator is located inside the box near the second air inlet, and the heating condenser is located inside the box near the second air outlet.

6. The drying system according to claim 5, characterized in that, The dehumidification heating system has at least two heating mechanisms, the heating evaporators of the at least two heating mechanisms are arranged sequentially along the length of the housing, and the heating condensers of the at least two heating mechanisms are arranged sequentially along the length of the housing.

7. The drying system according to claim 5, characterized in that, The dehumidification and heating system further includes a heat exchange mechanism, which includes a heat exchange evaporator, a heat exchange pump, and a heat exchange condenser connected in a passage. The heat exchange evaporator is located inside the box near the second air inlet, and the heat exchange condenser is located inside the box near the second air outlet.

8. The drying system according to claim 7, characterized in that, The heat exchange evaporator is disposed between the filtration mechanism and the condensation mechanism.

9. The drying system according to claim 7, characterized in that, The heat exchange condenser is disposed between the heating evaporator and the heating condenser.

10. The drying system according to claim 1, characterized in that, The first heating system includes a primary steam heating system and a secondary hot air furnace heating system connected in series. The air inlet of the primary steam heating system is connected to the air outlet of the blower, and the secondary hot air furnace heating system is connected to the air inlet of the drying tower. The separation system includes a cyclone separator and a bag filter connected in series. The air inlet of the cyclone separator is connected to the air outlet of the drying tower, and the air outlet of the bag filter is connected to the air inlet of the induced draft fan.

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