Preparation device and method of grass-tree composite-based traditional Chinese medicine residue biomass fuel

Abstract

The invention discloses a preparation device of a grass-tree composite-based traditional Chinese medicine residue biomass fuel. The preparation device comprises a material hopper, a dehydrator, a first-stage dryer, a first hot-air blower, a second-stage dryer and a second hot-air blower, the lower end of the material hopper is communicated with a feed port of the dehydrator; a discharge port of the dehydrator is communicated with a feed port of the first-stage dryer through a first auger; the front end of the first-stage dryer is communicated with a first air heater through a pipeline, and the rear end of the first-stage dryer is communicated with a feed port of the second-stage dryer through a second auger; the lower part of the secondary dryer is communicated with a second air heater through a pipeline; and a discharge port of the second-stage dryer is communicated with a feed port of the storage tank through a third auger. Compared with the prior art, the method has the advantages that early-stage moisture removal is carried out on the grass-tree composite-based traditional Chinese medicine residues through the dehydrator, moisture in the grass-tree composite-based traditional Chinese medicine residues is effectively removed through drying of the two-stage dryer, the moisture of the grass-tree composite-based traditional Chinese medicine residues is stabilized within the suitable range for manufacturing biomass fuel, and the biomass fuel is stable in moisture content and high in heat value.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass fuel preparation, and in particular to a device and method for preparing a herb-based traditional Chinese medicine residue biomass fuel. Background Art

[0002] The Chinese medicine pharmaceutical industry produces a large amount of herbal-based Chinese medicine residues during the production process. Herbal-based Chinese medicine residues contain a large amount of carbon sources such as cellulose and hemicellulose, and are ideal biomass energy raw materials. However, if these herbal-based Chinese medicine residues are not properly handled, they will cause potential harm to the environment and also waste their potential as biomass energy. With the increase in energy demand and the improvement of environmental protection awareness, biomass fuel, as a clean energy, has gradually received attention due to its renewability and environmental friendliness. However, when the existing herbal-based Chinese medicine residues are used to make biomass fuels, due to the high water content, the biomass fuels made using herbal-based Chinese medicine residues as raw materials have unstable water content and low calorific value, resulting in low quality of the produced biomass fuels and high energy consumption in the production process. Therefore, it is urgently needed to be improved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a herbal composite-based Chinese medicine residue biomass fuel, which can effectively recycle the herbal composite-based Chinese medicine residue and produce a biomass fuel with stable water content and high calorific value, while also reducing excessive energy consumption in the production process.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A preparation device for herb-based traditional Chinese medicine residue biomass fuel comprises a material hopper, a dehydrator, a primary dryer, a first hot air blower, a secondary dryer, and a second hot air blower; the lower end of the material hopper is connected to the dehydrator feed port; the dehydrator discharge port is connected to the primary dryer feed port via a first auger; the front end of the primary dryer is connected to the first hot air blower via a pipeline, and the rear end is connected to the secondary dryer feed port via a second auger; the lower part of the secondary dryer is connected to the second hot air blower via a pipeline; the secondary dryer discharge port is connected to the storage tank feed port via a third auger.

[0006] Furthermore, the upper rear end of the first-stage dryer is connected to a heat exchanger through a pipe; the lower end of the heat exchanger is connected to the lower part of the second-stage dryer through a pipe; a first fan is provided on the pipe connecting the first-stage dryer and the heat exchanger; a second fan is provided on the pipe connecting the heat exchanger and the second-stage dryer; and the upper end of the second-stage dryer is connected to a third fan.

[0007] Furthermore, the first-stage dryer is a drum dryer.

[0008] Furthermore, the dehydrator is a press dehydrator or a spiral dehydrator.

[0009] Furthermore, the secondary dryer includes a shell, a motor detachably connected to the bottom of the shell, a rotating shaft fixedly connected to the output end of the motor and extending into the shell, several screens horizontally arranged inside the shell and separated by a certain distance, and a cleaning piece horizontally fixed to the rotating shaft and in contact with the screen at the lower end; the number of the cleaning pieces is 5; the number of the screens is 4; a first hole is opened in the middle of the screen for convenient passage of the rotating shaft; a second hole is also opened on the screen for leaking materials; the second holes on two adjacent screens are staggered with the axis.

[0010] Furthermore, a retaining ring is fixedly connected to the upper end surface of the screen near the rotating shaft; the retaining ring is arranged concentrically with the rotating shaft and has a gap to facilitate the rotation of the rotating shaft; the cleaning part includes a support rod, a connecting plate fixedly connected to the bottom of the support rod, and cleaning bristles located below the connecting plate and in contact with the screen.

[0011] The present invention also provides a method for preparing a herbaceous composite-based Chinese medicinal residue biomass fuel, using the preparation device, and the method steps are as follows:

[0012] S1: feeding the herbal composite-based Chinese medicine residue raw material into a dehydrator through a material hopper for dehydration to obtain a dehydrated mixture A;

[0013] S2: sending the dehydrated mixture A into the primary dryer through the first auger and drying the dehydrated mixture A once through the first hot air blower;

[0014] S3: The dehydrated mixture A after primary drying is fed into a secondary dryer through a second auger for secondary drying through a second hot air blower; the high-temperature water vapor energy generated by the primary drying is recovered through a heat exchanger for secondary drying;

[0015] S4: The herbal composite-based Chinese medicinal residue biomass fuel is obtained through secondary drying and is sent to a storage tank for storage through a third auger.

[0016] Preferably, the primary drying temperature in step S2 is 70°C to 80°C.

[0017] Preferably, the secondary drying temperature in step S3 is 50°C to 60°C.

[0018] Preferably, the biomass fuel prepared by the preparation method is used in a gasification heating system.

[0019] Beneficial effects of the present invention:

[0020] (1) The herbal composite Chinese medicine residue is dehydrated in the dehydrator to remove the moisture in the early stage, and then dried in the secondary dryer, which effectively removes the moisture in the herbal composite Chinese medicine residue, so that the moisture content of the herbal composite Chinese medicine residue is stable within the suitable range for making biomass fuel, and the biomass fuel has stable moisture content and high calorific value;

[0021] (2) By setting a heat exchanger between the first-stage dryer and the second-stage dryer, the energy in the hot air in the first-stage dryer can be effectively recovered and reused in the second-stage dryer, effectively reducing heat loss, which is economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a structural diagram of a two-stage dryer;

[0024] Figure 3 Schematic diagram of the structure of the screen.

[0025] In the figure,

[0026] 1- material hopper, 2- dehydrator, 3- first auger, 4- first dryer, 5- first hot air blower, 6- second auger, 7- second dryer, 8- second hot air blower, 9- heat exchanger, 10- third auger, 11- storage tank, 12- first fan, 13- second fan, 14- third fan;

[0027] 71-housing, 72-motor, 73-rotating shaft, 74-screen, 75-cleaning part, 76-retaining ring;

[0028] 741-first hole, 742-second hole, 751-support rod, 752-connecting plate, 753-cleaning brush bristles. DETAILED DESCRIPTION

[0029] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0030] A preparation device for herbaceous composite-based Chinese medicine residue biomass fuel, referring to Figure 1-3As shown, it includes a material hopper 1, a dehydrator 2, a first-level dryer 4, a first hot air blower 5, a second-level dryer 7, and a second hot air blower 8; the lower end of the material hopper 1 is connected to the feed port of the dehydrator 2; the discharge port of the dehydrator 2 is connected to the feed port of the first-level dryer 4 through the first auger 3; the front end of the first-level dryer 4 is connected to the first hot air blower 5 through a pipeline, and the rear end is connected to the feed port of the second-level dryer 7 through the second auger 6; the lower part of the second-level dryer 7 is connected to the second hot air blower 8 through a pipeline; the discharge port of the second-level dryer 7 is connected to the feed port of the storage tank 11 through the third auger 10.

[0031] It should be noted that the material hopper 1 can facilitate the entry of the herbal composite-based Chinese medicine residue into the dehydrator 2 for dehydration, and a material hopper 1 with controllable feed or a material hopper 1 with controllable weight can also be used to control the herbal composite-based Chinese medicine residue; the dehydrator 2 can dehydrate a large amount of water in the herbal composite-based Chinese medicine residue in the early stage, which is convenient for the subsequent drying process; the first-level dryer 4 can perform the initial drying of the herbal composite-based Chinese medicine residue; the second-level dryer 7 can further perform the secondary drying of the herbal composite-based Chinese medicine residue, effectively ensuring the drying effect, and ensuring that the moisture content of the herbal composite-based Chinese medicine residue reaches the suitable moisture content for making biomass fuel; the first hot air blower 5 and the second hot air blower 8 can provide hot air for drying to ensure the drying effect; a hot air blower can also be used as the source of hot air, and the setting can be determined according to the site, and those skilled in the art can reasonably choose

[0032] Specifically, the upper rear end of the first-stage dryer 4 is connected to a heat exchanger 9 through a pipe; the lower end of the heat exchanger 9 is connected to the lower part of the second-stage dryer 7 through a pipe; a first fan 12 is provided on the pipe connecting the first-stage dryer 4 and the heat exchanger 9 and the second-stage dryer 7; a second fan 13 is provided on the pipe connecting the heat exchanger 9 and the second-stage dryer 7; and a third fan 14 is connected to the upper end of the second-stage dryer 7. The provision of the heat exchanger 9 can effectively utilize the high-temperature water vapor in the first-stage dryer 4 and provide heat to the second-stage dryer 7 after heat exchange, effectively reducing energy loss and being environmentally friendly. In this application, the first-stage dryer 4 adopts a drum dryer. The dehydrator 2 adopts a press dehydrator or a spiral dehydrator. This application adopts a spiral dehydrator. Those skilled in the art can make a reasonable choice of model according to the usage.

[0033] Specifically, the secondary dryer 7 includes a shell 71, a motor 72 detachably connected to the bottom of the shell 71, a rotating shaft 73 fixedly connected to the output end of the motor 72 and extending into the interior of the shell 71, several screens 74 horizontally arranged inside the shell 71 and separated by a certain distance, and a cleaning piece 75 horizontally fixed to the rotating shaft 73 and the lower end of which is in contact with the screen 74; the number of cleaning pieces 75 is 5; the number of screens 74 is 4; those skilled in the art can also reasonably choose the number of cleaning pieces 75 and the number of screens 74 as needed, but it should be noted that the number of cleaning pieces 75 is one more than the number of screens 74; a first hole 741 is provided in the middle of the screen 74 for convenient passage of the rotating shaft 73; a second hole 742 for leaking material is also provided on the screen 74; the second holes 742 on two adjacent screens 74 are staggered. The setting of the shell 71 can facilitate the entry of the herbal composite-based Chinese medicine residue and the arrangement of various components; the motor 72 can provide a power source for the rotating shaft 73. The motor 72 can be selected according to actual usage conditions. It is easy for those skilled in the art to understand and will not be repeated here; the screen 74 can support the herbal composite-based Chinese medicine residue entering the secondary dryer 7 and facilitate the flow of hot air generated by the second hot air blower 8; the rotating shaft 73 can drive the cleaning part 75 to rotate; the cleaning part 75 can sweep the herbal composite-based Chinese medicine residue on the screen 74 from the upper-level screen 74 through the second hole 742 to the next level, so that the herbal composite-based Chinese medicine residue is effectively dried.

[0034] Specifically, a retaining ring 76 is fixedly connected to the upper end surface of the screen 74 near the rotating shaft 73; the retaining ring 76 is arranged concentrically with the rotating shaft 73 and has a gap to facilitate the rotation of the rotating shaft 73. The setting of the retaining ring 76 can prevent the herbal composite-based Chinese medicine residue from getting stuck in the gap between the rotating shaft 73 and the screen 74, causing the equipment to stop rotating; the cleaning member 75 includes a support rod 751, a connecting plate 752 fixed below the support rod 751, and cleaning bristles 753 located below the connecting plate 752 and in contact with the screen 74. The support rod 751 can support the connecting plate 752 and the cleaning bristles 753; the connecting plate 752 can ensure the stable setting of the cleaning bristles 753; the cleaning bristles 753 are made of a material that can withstand a certain temperature, and those skilled in the art can select according to actual conditions.

[0035] A method for preparing a herb-based Chinese medicinal residue biomass fuel, using the above-mentioned herb-based Chinese medicinal residue biomass fuel preparation device, the method steps are as follows:

[0036] S1: feeding the herbal composite-based Chinese medicine residue raw material into the dehydrator 2 through the material hopper 1 for dehydration to obtain a dehydrated mixture A;

[0037] S2: The dehydrated mixture A is fed into the primary dryer 4 through the first auger 3 and dried once through the first hot air blower 5;

[0038] S3: The dehydrated mixture A after primary drying is fed into a secondary dryer 7 via a second auger 6 and then subjected to secondary drying via a second hot air blower 8. The high-temperature water vapor energy generated during primary drying is recovered via a heat exchanger 9 for secondary drying.

[0039] S4: The herbaceous composite-based Chinese medicinal residue biomass fuel is obtained through secondary drying and is sent to the storage tank 11 through the third auger 10 for storage.

[0040] Specifically, the primary drying temperature in step S2 is 70°C to 80°C; for example, 71°C, 72°C, 73°C, 74°C, 75°C, 76°C, 77°C, 78°C, 79°C, or 80°C is used for primary drying.

[0041] Specifically, the secondary drying temperature in step S3 is 50°C to 60°C; for example, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, and 60°C are used for secondary drying.

[0042] Specifically, the biomass fuel prepared by the preparation method is used in a gasification heating system.

[0043] The ash content of the herbaceous composite-based Chinese medicinal residue biomass fuel prepared by the present application is lower than that of ordinary biochar (pine, pear, eucalyptus), and the calorific value is higher than that of biochar (pine, pear, eucalyptus). In addition, the water content of the biomass fuel prepared after drying is stable, which effectively improves the quality of the biomass fuel made from the herbaceous composite-based Chinese medicinal residue.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A device for preparing a herbaceous composite-based Chinese medicinal residue biomass fuel, characterized by: The invention comprises a material hopper (1), a dehydrator (2), a primary dryer (4), a first hot air blower (5), a secondary dryer (7), and a second hot air blower (8); the lower end of the material hopper (1) is connected to the feed port of the dehydrator (2); the discharge port of the dehydrator (2) is connected to the feed port of the primary dryer (4) through a first auger (3); the front end of the primary dryer (4) is connected to the first hot air blower (5) through a pipeline, and the rear end is connected to the feed port of the secondary dryer (7) through a second auger (6); the lower part of the secondary dryer (7) is connected to the second hot air blower (8) through a pipeline; the discharge port of the secondary dryer (7) is connected to the feed port of a storage tank (11) through a third auger (10).

2. The preparation device of the herbaceous composite-based Chinese medicinal residue biomass fuel according to claim 1, characterized in that: The upper portion of the rear end of the primary dryer (4) is connected to a heat exchanger (9) through a pipeline; the lower end of the heat exchanger (9) is connected to the lower portion of the secondary dryer (7) through a pipeline; a first fan (12) is provided on the pipeline connecting the primary dryer (4) and the heat exchanger (9); a second fan (13) is provided on the pipeline connecting the heat exchanger (9) and the secondary dryer (7); and a third fan (14) is provided on the upper end of the secondary dryer (7).

3. The preparation device of the herb-based Chinese medicinal residue biomass fuel according to claim 2, characterized in that: The first-stage drying machine (4) is a drum drying machine.

4. The preparation device of the herb-based Chinese medicinal residue biomass fuel according to claim 2, characterized in that: The dehydrator (2) is a press-type dehydrator or a spiral dehydrator.

5. The preparation device of the herb-based Chinese medicinal residue biomass fuel according to claim 2, characterized in that: The secondary drying machine (7) comprises a housing (71), a motor (72) detachably connected to the bottom of the housing (71), a rotating shaft (73) fixedly connected to the output end of the motor (72) and extending into the interior of the housing (71), a plurality of screens (74) horizontally arranged inside the housing (71) and spaced a certain distance apart, and a cleaning member (75) horizontally fixedly connected to the rotating shaft (73) and with its lower end in contact with the screen (74); the number of the cleaning members (75) is five; the number of the screens (74) is four; a first hole (741) is provided in the middle of the screen (74) for facilitating the passage of the rotating shaft (73); a second hole (742) for leaking material is also provided on the screen (74); the second holes (742) on two adjacent screens (74) are staggered.

6. The preparation device of the herb-based Chinese medicinal residue biomass fuel according to claim 5, characterized in that: A retaining ring (76) is fixedly connected to the upper end surface of the screen (74) near the rotating shaft (73); the retaining ring (76) is concentrically arranged with the rotating shaft (73) and has a gap to facilitate the rotation of the rotating shaft (73); the cleaning member (75) includes a support rod (751), a connecting plate (752) fixedly connected to the bottom of the support rod (751), and cleaning bristles (753) located below the connecting plate (752) and in contact with the screen (74).

7. A method for preparing a herbaceous composite-based Chinese medicinal residue biomass fuel, characterized by: Using the preparation device according to any one of claims 2 to 6, the method steps are as follows: S1: sending the herbal composite-based Chinese medicine residue raw material into a dehydrator (2) through a material hopper (1) for dehydration to obtain a dehydrated mixture A; S2: The dehydrated mixture A is sent to the primary drying machine (4) through the first auger (3) and the dehydrated mixture A is dried once by the first hot air blower (5); S3: The dehydrated mixture A after the primary drying is sent to the secondary drying machine (7) through the second auger (6) and is dried for the secondary time by the second hot air blower (8); and the high-temperature water vapor energy generated by the primary drying is recovered by the heat exchanger (9) and used for the secondary drying; S4: The herbaceous composite-based Chinese medicinal residue biomass fuel is obtained through secondary drying and is sent to a storage tank (11) for storage through a third auger (10).

8. The method for preparing a herb-based Chinese medicinal residue biomass fuel according to claim 7, characterized in that: The primary drying temperature in step S2 is 70° C. to 80° C.

9. The method for preparing a herb-based Chinese medicinal residue biomass fuel according to claim 7, characterized in that: The secondary drying temperature in step S3 is 50° C. to 60° C.

10. The method for preparing a herb-based traditional Chinese medicine residue biomass fuel according to claim 1, characterized in that: The biomass fuel prepared by the preparation method is used in a gasification heating system.

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