Bamboo reed alternate drying coupling MVR (Mechanical Vapor Recompression) system
By using a rotating vacuum drying coupled with an MVR system for reeds, uniform drying of reeds is achieved through a steam compressor and heater, and secondary steam is recovered as a heat source. This solves the problems of high energy consumption, uneven quality, and difficult management of existing drying methods, and realizes efficient and economical reed drying.
Patent Information
- Application Number
- CN202520066573.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-11
AI Technical Summary
Existing methods for drying reeds, such as natural sun-drying and simple drying in a drying room, have problems such as drying speed being greatly affected by the weather, high energy consumption, uneven quality, large land area required, high management difficulty, and high pollution risk.
A rotating vacuum drying coupled MVR system for reeds is adopted, which uses a steam compressor for compression and heating, and then uses primary and secondary heaters to dry the reeds evenly. Secondary steam is recovered as a heat source for drying, realizing heat reuse. Electric gates and steam main pipe agitation are combined to improve drying uniformity and efficiency.
It significantly reduces drying energy consumption, improves the economy and energy efficiency of reed drying, ensures consistent drying quality, reduces land occupation and management difficulty, and reduces fire risk.
Smart Images
Figure CN223896409U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the field of biomass energy, and particularly relates to a reed rotation drying and coupling MVR (mechanical vapor recompression) system. BACKGROUND
[0002] As a potential energy plant, the yield of reed per mu can reach 3-5 tons (dry basis), but the moisture content of the harvested reed is generally more than 70%, and the drying and dehydration process plays a crucial role in energy conversion and utilization. However, the natural airing or simple oven drying method widely used at present has many shortcomings, which seriously limits the subsequent application and development of reed.
[0003] The natural airing method is a traditional drying method, which relies on sunlight, air and wind in the natural environment to remove the moisture in the reed. In rainy weather, the drying speed of the reed may be reduced to only remove 10%-20% of the moisture per day. Although the drying speed will be improved in sunny weather, it still takes several days or even weeks to dry the reed to a suitable moisture content. However, this method has many problems, 1, the drying speed of the natural airing method is affected by many factors such as weather conditions, seasonal changes, reed species and size. In rainy weather or in seasons with high humidity, the drying speed will be significantly slowed down, resulting in a large amount of reed accumulation that cannot be processed in time; 2, since natural airing requires a large area of land to place the reed, it increases the cost of land use. At the same time, the accumulation of a large amount of reed also increases the management difficulty and fire risk; 3, during the natural airing process, the reed is easily contaminated by dust, insects and microorganisms, resulting in a decrease in quality. In addition, long-term exposure may also cause the loss of nutrients in the reed.
[0004] The simple oven drying method is to remove the moisture in the reed by heating the air in the oven. When using a simple oven to dry the reed, the energy cost may account for 30%-50% of the total cost. At the same time, due to uneven drying, about 10%-20% of the reed may lose its original quality due to over-drying or insufficient drying, which seriously affects its subsequent processing. CONTENT OF THE INVENTION
[0005] In view of the above shortcomings of the prior art, the application provides a reed rotation vacuum drying and coupling MVR system, which collects secondary steam in a sealed manner, compresses and heats the steam by using a steam compressor, and then uses the steam as a drying heat source, thereby significantly reducing the drying energy consumption and improving the economic efficiency and energy efficiency of reed drying.
[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is: a reed rotation vacuum drying coupled MVR system, which comprises at least two drying chambers for accommodating reeds, a steam compressor; the at least two drying chambers are each provided with an electric door for opening and closing the drying chamber; the inside of the at least two drying chambers is each provided with a first heater and a second heater, the first heater and the second heater are connected in sequence, and the first heater is communicated with the steam compressor; the inside of the at least two drying chambers is also provided with a steam main pipe, the gas inlet end of the steam main pipe is communicated with the outlet of the steam compressor; the at least two drying chambers are also provided with a secondary steam outlet pipe, the outlet end of the secondary steam outlet pipe is communicated with the steam compressor, so that the steam generated in the drying chamber is circulated into the steam compressor.
[0007] With the above structure, the present application is provided with a first heater and a second heater connected with the steam compressor in the drying chamber, the steam compressor inputs high-temperature gas into the heater, the heater generates high-temperature drying heat pressure to reed, so that uniform drying of the reed in the drying chamber can be realized, and the quality of the reed is prevented from being reduced due to uneven drying; in addition, the steam main pipe is also provided in the drying chamber, the steam of the steam main pipe can stir the drying heat source in the drying chamber, so that it is more evenly contacted with the reed, and the uniform drying of the reed is further improved; more importantly, the present application is also provided with a secondary steam outlet on the drying chamber, so that the steam generated in the drying process of the reed in the closed space of the drying chamber can enter the steam compressor again through the secondary steam outlet for compression and heating, and then enter the drying chamber through the steam main pipe as a drying heat source for heat recycling, realizing that electric energy replaces traditional hot air or steam heating, significantly reducing drying energy consumption, and improving the economy and energy efficiency of reed drying.
[0008] Further, the outlet end of the steam compressor is connected with the first heater and the steam main pipe; with this structure, the high-temperature heat source from the steam compressor is divided into two paths, one path passes through the heater to dry the reed, and the other path passes through the steam main pipe to directly enter the drying chamber to stir the internal heat source, so that the uniformity of the contact between the heat source in the drying chamber and the reed is improved, and the drying efficiency is improved, and the situation of uneven drying does not occur.
[0009] Further, a dust remover is arranged between the secondary steam outlet pipe and the steam compressor, and the dust remover is used for purifying the steam in the drying chamber; with this structure, the high-temperature gas in the steam compressor can be fully purified and then circulated into the drying chamber, avoiding pollution to the drying chamber.
[0010] Further, the part of the steam main pipe located in the drying chamber is provided with a plurality of steam nozzles, which are uniformly distributed on the inner bottom surface of the drying chamber; by this structure, the steam sprayed from the steam main pipe can enter the drying chamber more evenly, fully stirring the heat source in the drying chamber, and realizing uniform drying of the reed canary grass.
[0011] Further, the first and second heaters are respectively located on the inner top wall and side wall of the drying chamber; by this structure, balanced heating in multiple directions in the drying chamber can be realized, further improving the uniform drying efficiency of the reed canary grass.
[0012] Further, the electric door comprises a door panel, a driving mechanism connected with the door panel, the driving mechanism comprising a driving motor, a main pulley, a movable pulley and a flexible cable, the main pulley being connected with the traction end of the driving motor through the flexible cable, the movable pulley being supported on a vertical column and connected with the door panel through the flexible cable; by this structure, when it is necessary to open and close the drying chamber to put in and take out the reed canary grass, the motor is started, and the motor operates to lift the door panel through the main pulley, the movable pulley and the flexible cable, realizing opening and closing of the drying chamber.
[0013] Further, the drying chamber is provided with a reed canary grass carrying trolley; by this structure, when the reed canary grass is dried, the trolley and the reed canary grass are pushed into the drying chamber as a whole, and drying is realized, which is convenient for carrying.
[0014] Further, the second heater is provided with a condensed water output pipeline, the outlet of the condensed water output pipeline extending to the outside of the drying chamber, and a steam trap valve being arranged on the condensed water output pipeline; by this structure, the condensed water generated by the second heater is discharged through the pipeline and controlled through the steam trap valve.
[0015] Further, a secondary steam regulating valve is arranged on the pipeline of the secondary steam outlet pipe, and the secondary steam regulating valve is communicated with the inlet of the dust collector; by this structure, the secondary steam regulating valve can be used to adjust the opening and closing of the steam in the drying chamber, and the steam is purified in the dust collector before entering the steam compressor, avoiding interference to the compressor and ensuring that the high-temperature steam entering the heater and the steam main pipe is cleaner.
[0016] Further, the inlet end of the steam main pipe is provided with a steam direct-in regulating valve, which is used to adjust the opening and closing of the steam in the steam main pipe and the flow rate, avoiding excessive steam affecting the drying of the reed canary grass.
[0017] Further, the drying chamber is provided with two, and the two drying chambers are arranged side by side; the electric door is arranged at the two ends of the two drying chambers; by adopting the structure, the drying efficiency of the reed can be improved by the arrangement of the two drying chambers; or one is drying, and the other is unloading or loading, so that the drying of the reed is not interrupted; and the electric door is arranged at the two ends of the two drying chambers, and when the two drying chambers are operated respectively, they are exchanged with each other to affect each other. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a structure schematic diagram of the reed rotation drying coupling MVR system of the application (without setting a dust remover).
[0019] Figure 2 It is a structure schematic diagram of the reed rotation drying coupling MVR system of the application (setting a dust remover).
[0020] Figure 3 It is a structure schematic diagram of the steam main pipe of the application.
[0021] In the figure: 1, drying chamber, 2. Steam compressor, 3. Electric door, 301. Door plate, 302. Driving motor, 303. Main pulley, 304. Movable pulley, 305. Flexible rope, 306. Column, 4. Primary heater, 5. Secondary heater, 501. Condensate output pipeline, 6. Steam main pipe, 601. Steam nozzle, 7. Secondary steam outlet pipe, 8. Dust remover, 9. Reed bearing trolley, 10. Steam trap, 11. Secondary steam regulating valve, 12. Steam direct inlet regulating valve. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the embodiments and the drawings. Obviously, the described embodiments are only preferred embodiments, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application;
[0023] Furthermore, it should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or it may be fixed via another intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or it may be fixed via another intermediate component. When a component is referred to as being "set on" another component, it can be set directly on the other component or it may be fixed via another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0024] As attached Figures 1-3 The diagram illustrates a combined vacuum drying and mechanical regeneration (MVR) system for reeds according to this application. The system includes at least two drying chambers 1 for housing reeds, and a steam compressor 2. Each of the at least two drying chambers 1 is equipped with an electric door 3 for opening and closing. Each of the at least two drying chambers 1 contains a primary heater 4 and a secondary heater 5, which are sequentially connected and connected to the steam compressor 2 (a high-temperature heat source generated by the steam compressor is introduced into the heater, generating heat within the drying chamber to dry the reeds). Each of the at least two drying chambers 1 also contains a steam main pipe 6, the inlet of which is connected to the outlet of the steam compressor 2 (the heat source generated by the steam compressor enters the drying chamber through the steam main pipe, agitating the environment within the drying chamber). Each of the at least two drying chambers 1 also has a secondary steam outlet pipe 7, the outlet of which is connected to the steam compressor 2, allowing steam generated within the drying chambers 1 to circulate into the steam compressor 2.
[0025] With the above structure, the first heater and the second heater connected with the steam compressor are arranged in the drying chamber, the steam compressor inputs high-temperature gas into the heater, the heater generates high-temperature drying heat pressure to add to the bamboo cane, so that uniform drying of the bamboo cane in the drying chamber can be realized, and the quality of the bamboo cane is prevented from being reduced due to uneven drying; in addition, the steam main pipe is arranged in the drying chamber, the steam of the steam main pipe can agitate the drying heat source in the drying chamber, so that the drying heat source is more evenly contacted with the bamboo cane, and the uniform drying of the bamboo cane is further improved; and more importantly, the secondary steam outlet is arranged on the drying chamber, so that the steam generated in the drying process of the bamboo cane in the closed space of the drying chamber can enter the steam compressor again to be compressed and heated, and then enters the drying chamber through the steam main pipe to realize heat recycling, so that the electric energy replaces the traditional hot air or steam heating, the drying energy consumption is significantly reduced, and the economy and energy efficiency of the bamboo cane drying are improved.
[0026] As shown in the accompanying drawings, Figures 1-2 The outlet end of the steam compressor 2 is connected with the first heater 4 and the steam main pipe 6 respectively; with the structure, the high-temperature heat source from the steam compressor is divided into two paths, one path passes through the heater to dry the bamboo cane, and the other path passes through the steam main pipe to directly enter the drying chamber to agitate the internal heat source, so that the uniformity of the contact between the heat source and the bamboo cane in the drying chamber is improved, and the drying efficiency is improved, and the uneven drying does not occur.
[0027] As shown in the accompanying drawings, Figure 2 The secondary steam outlet pipe 7 and the steam compressor 2 are provided with a dust remover 8 (such as a bag dust remover or other dust removal device), and the dust remover 8 is used for purifying the steam in the drying chamber 1; with the structure, the high-temperature gas in the steam compressor can be fully purified and then recycled into the drying chamber, so that the drying chamber is prevented from being polluted.
[0028] As shown in the accompanying drawings, Figures 1-3 The part of the steam main pipe 6 located in the drying chamber 1 is provided with a plurality of steam nozzles 601, and the steam nozzles 601 are uniformly distributed on the inner bottom surface of the drying chamber 1; the part of the steam main pipe located in the drying chamber can be adapted to the area of the inner bottom surface of the drying chamber, the part is a hollow plate, and a plurality of steam nozzles 601 are uniformly distributed on the upper surface of the plate; with the structure, the gas sprayed from the steam main pipe forms a flow medium from bottom to top in the drying chamber, and the gas can more evenly enter the drying chamber to fully agitate the heat source in the drying chamber, so that the uniform drying of the bamboo cane is realized.
[0029] As shown in the accompanying drawings, Figures 1-2As shown in the drawings, the primary heater 4 and the secondary heater 5 described in the present application are respectively located at the inner top wall and the side wall (the side wall away from the automatic door) of the drying chamber 1; with this structure, balanced heating in multiple directions in the drying chamber can be achieved, further improving the uniform drying efficiency of the reed canes; the heater of the present application can also be provided with more, such as a tertiary heater or a quaternary heater, etc., to be set according to the needs of the reed canes to be dried.
[0030] As shown in the drawings, Figures 1-2 As shown in the drawings, the electric door 3 described in the present application includes a door panel 301, a driving mechanism connected to the door panel 301, the driving mechanism including a driving motor 302, a main pulley 303, a movable pulley 304 and a flexible cable 305, the main pulley 303 being connected to the traction end of the driving motor 302 through the flexible cable 305, the movable pulley 304 being supported on a stand column 306 and being connected to the door panel 301 through the flexible cable 305; the driving motor and the main pulley of the driving mechanism can be fixed at the top end of the drying chamber, and the stand column is also connected to the top end of the drying chamber, wherein the movable pulley and the main pulley have shafts to facilitate their rotation under the drive of the flexible cable, thereby driving the door panel to rise and fall, the driving motor is a driving structure with an extension driving rod to generate traction force on the flexible cable, the above is a typical simple mechanical structure for lifting the door panel through the pulley assembly and the driving mechanism, which does not need to be described in detail again. With this structure, when it is necessary to open and close the drying chamber to put in and take out the reed canes, the motor is started, and the motor operates to lift and lower the door panel through the main pulley, the movable pulley and the flexible cable, thereby realizing the opening and closing of the drying chamber; the electric door described above lifts the door panel by using the pulley, the bottom of the door panel is provided with a sealing gasket, and the electric door itself can realize sealing, thereby ensuring that the heat source in the drying chamber is lost less.
[0031] As shown in the drawings, Figures 1-2 As shown in the drawings, the drying chamber 1 described in the present application is provided with a reed cane carrying trolley 9 (a small trolley with a push rod, a trolley frame and wheels, which is matched with the volume of the drying chamber, a support plate structure for supporting the trolley can be provided on the bottom surface of the drying chamber, and does not affect the placement of the steam main pipe); the trolley frame of the reed cane carrying trolley can be a structure with air holes to facilitate the drying of the reed canes in the trolley by the heat source; or the trolley frame has no side wall to facilitate the drying of the exposed reed canes by the heat source; with this structure, when the reed canes are dried, the trolley and the reed canes are pushed into the drying chamber as a whole, and drying can be realized, which is convenient for carrying.
[0032] As shown in the drawings, Figures 1-2As shown in the application described in the secondary heater 5 is provided with condensate water output pipeline 501, the outlet of the condensate water output pipeline 501 extends in the drying chamber 1 outside, the condensate water output pipeline 501 is provided with steam trap 10;With this structure, the condensate water produced by the secondary heater is discharged through the pipeline, and the steam trap is used for control.
[0033] As shown in the application described in the secondary steam outlet pipe 7 is provided with secondary steam regulating valve 11, the secondary steam regulating valve 11 is communicated with the inlet of the dust collector 8;With this structure, the opening and closing of the steam in the drying chamber can be adjusted by the secondary steam regulating valve, and the dust removal and purification in the dust collector is carried out before entering the steam compressor, which avoids the interference to the compressor and ensures that the high temperature steam entering the heater and the steam main pipe is cleaner. Figures 1-2 The inlet end of the steam main pipe 6 is provided with a steam direct regulating valve 12, which is used for the opening and closing of the steam in the steam main pipe 6, and the adjustment of the flow size, so as to avoid the influence of excessive steam on the drying of the reed.
[0034] As shown in the application described in the drying chamber 1 is provided with two, and the two drying chambers 1 are arranged side by side;The electric door 3 is arranged at the two ends of the two drying chambers 1 arranged opposite to each other;The drying chamber can be a cuboid structure, and the two drying chambers can be integrally arranged, separated by a partition plate to form two chambers;With this structure, the drying efficiency of the reed can be improved by arranging two drying chambers;Or one is drying, and the other is unloading or loading, so as to realize the purpose of rotating drying, so as to not cause the interruption of the drying of the reed, fully utilize the time, realize the purpose and effect of uninterrupted drying;And the electric door is arranged at the two ends of the two drying chambers arranged opposite to each other, and when the two drying chambers are operated respectively, they will not affect each other.
[0035] Figures 1-2 It should be noted that the part of the dotted line in the drawing of the application is the logical control of the valve and the motor, indicating that these regulating valves or motors are linked to control, and do not need to be manually moved;The solid line in the drawing of the application is the pipeline and pipeline connecting each part of the application;From the real picture of the reed dried by the application, it can be seen that the reed is green and has high water content when it is cut, and the water content of the reed can be effectively reduced by the circulating drying method of the application, so as to realize the drying of the reed and facilitate the subsequent application.
[0036] It should be noted that the part of the dotted line in the drawing of the application is the logical control of the valve and the motor, indicating that these regulating valves or motors are linked to control, and do not need to be manually moved;The solid line in the drawing of the application is the pipeline and pipeline connecting each part of the application;From the real picture of the reed dried by the application, it can be seen that the reed is green and has high water content when it is cut, and the water content of the reed can be effectively reduced by the circulating drying method of the application, so as to realize the drying of the reed and facilitate the subsequent application.
[0037] Compared with the prior art, the utility model has the advantages that: through automatic rotation drying chamber, closed collection secondary steam and using steam compressor compression heating, then as drying heat source, realized electric energy to replace traditional hot air or steam heating, significantly reduced drying energy consumption, improved the economy and energy efficiency of reed drying; the steam compressor of the application is a kind of MVR (mechanical vapor recompression technology) technology, can efficiently recover and reuse secondary steam latent heat, significantly reduce energy consumption, compared with traditional method can save energy up to 70%; at the same time, MVR technology improves steam heat enthalpy through mechanical compression, without additional heat source, reduces operating cost, MVR system is high in degree of automation, easy to operate, small in floor area, improves drying efficiency, the drying of reed is combined with MVR, can greatly reduce the energy consumption of reed drying, more suitable for large-scale processing of reed biomass.
Claims
1. A reed-based alternating drying coupled MVR system, characterized in that: The system includes at least two drying chambers for accommodating reeds, and a steam compressor; each of the at least two drying chambers is equipped with an electric door for opening and closing; each of the at least two drying chambers is equipped with a primary heater and a secondary heater, which are connected sequentially and are connected to the steam compressor; each of the at least two drying chambers is also equipped with a steam main pipe, the inlet of which is connected to the outlet of the steam compressor; each of the at least two drying chambers is also equipped with a secondary steam outlet pipe, the outlet of which is connected to the steam compressor so that the steam generated in the drying chambers circulates into the steam compressor.
2. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: The outlet end of the steam compressor is connected to the primary heater and the main steam pipe, respectively.
3. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: A dust collector is installed between the secondary steam outlet pipe and the steam compressor, and the dust collector is used to purify the steam in the drying chamber.
4. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: The portion of the steam main pipe located within the drying chamber is equipped with multiple steam nozzles, which are evenly distributed on the inner bottom surface of the drying chamber.
5. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: The primary heater and the secondary heater are located on the inner top wall and side wall of the drying chamber, respectively.
6. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: The electric door includes a door panel and a drive mechanism connected to the door panel. The drive mechanism includes a drive motor, a main pulley, a movable pulley, and a flexible cable. The main pulley is connected to the traction end of the drive motor via the flexible cable, and the movable pulley is supported on a column and connected to the door panel via the flexible cable.
7. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: The drying chamber is equipped with a bamboo support cart.
8. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: The secondary heater is equipped with a condensate outlet pipe, the outlet of which extends to the outside of the drying chamber, and a steam trap is installed on the condensate outlet pipe.
9. The reed-based alternating drying coupled MVR system according to claim 3, characterized in that: A secondary steam regulating valve is installed on the secondary steam outlet pipe, and the secondary steam regulating valve is connected to the inlet of the dust collector; a steam direct inlet regulating valve is installed at the inlet end of the steam main pipe, and the steam direct inlet regulating valve is used to open and close the steam in the steam main pipe and adjust the flow rate.
10. The reed-based alternating drying coupled MVR system according to claim 1, characterized in that: There are two drying chambers, which are arranged side by side; the electric doors are located at opposite ends of the two drying chambers.