Horizontal drying machine

Abstract

The utility model belongs to the technical field of feed, food and environment-friendly machinery, and relates to a dryer, in particular to a horizontal dryer. The horizontal drying machine comprises a feeding section; the material returning section and the drying section are arranged between the feeding section and the material returning section; the drying section comprises at least one drying area, a plurality of layers of conveying assemblies are arranged in the drying area from top to bottom, and partition plates are arranged between the conveying assemblies; the drying section comprises a first temperature zone, a second temperature zone and a third temperature zone, wherein the first temperature zone is located on the uppermost conveying assembly and close to the feeding section; the second temperature area is located at the part, close to the material returning section, of the upper and lower adjacent conveying assemblies; the third temperature area is located at the part, close to the feeding section, of the upper and lower adjacent conveying assemblies; the cooling area is located on the portion, close to the discharging port, of the lowermost conveying assembly. The horizontal dryer is used for solving the technical problems that an existing horizontal dryer is unreasonable in temperature zone division, high in energy consumption, limited in plant space and difficult in capacity expansion and yield increase.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of feed, food and environmental protection machinery, and relates to a dryer, in particular to a horizontal dryer. BACKGROUND

[0002] Taking the feed industry as an example, at present, horizontal dryers are widely applied to the rear-end processing links of aquatic sinking and floating granular production lines and pet food production lines.

[0003] The existing horizontal dryer generally comprises a spreader (responsible for feeding and spreading of materials), an inlet and return section (responsible for material return and powder removal), a conveying belt (responsible for material bearing and transportation), a drying section (responsible for water removal of materials), a supporting leg (responsible for supporting the whole machine), a fresh air supplementing port (responsible for supplementing fresh air), a wet air exhaust door (a wet air exhaust passage), and a heat source (responsible for heating air).

[0004] The drying principle of the existing horizontal dryer is that air is heated by a heat source and vertically passes through materials moving along a conveying belt from top to bottom or from bottom to top (the flow direction of the hot air is crossed with the advancing direction of the materials in a "cross" shape), so as to remove water in the materials and achieve the drying purpose.

[0005] With the implementation of the national energy conservation and environmental protection policy and the gradual implementation of relevant supervision work, the drying link, which accounts for a large proportion of the energy consumption of a production line, has become the focus of cost reduction and efficiency increase in the industry. In the increasingly fierce competition, a large-capacity horizontal dryer that can simultaneously consider low power consumption, stable and reliable performance, and convenient maintenance will be highly favored.

[0006] For a long time, various manufacturers of horizontal dryers have proposed a variety of solutions to address customer pain points, but the existing horizontal dryers on the market still have the following shortcomings:

[0007] 1. Unreasonable temperature zone scheme. Many dryers on the market have unreasonable zoning, such as not following the drying characteristic curve in the division of temperature zones, dividing the fast drying stage and the slow drying stage in one temperature zone, which leads to unreasonable allocation of energy and air volume, increases energy consumption, and makes the drying effect unsatisfactory. In each temperature zone, there is also a lack of effective recycling of hot air, which further increases energy consumption. At the same time, there are design defects in the exhaust and sealing of some temperature zones, which inevitably cause uneven drying moisture.

[0008] 2. Lack of built-in cooling section or insufficient utilization of cooling section energy. Traditional horizontal dryers are generally not designed with a built-in cooling section, which requires a large cooling process space layout and additional equipment costs. New products on the market with a built-in cooling section also often fail to fully utilize the energy of the cooling section, resulting in waste.

[0009] 3. When facing large production capacity and drying high-moisture and high-bulk-density materials, horizontal dryers often need to add multiple drying sections or more dryers to extend the drying time and increase production capacity, which will make it difficult to arrange them in the factory and the energy consumption will be unsatisfactory. Utility Model Content

[0010] The utility model aims to provide a horizontal dryer to solve the technical problems of the existing horizontal dryer such as unreasonable temperature zone division, high energy consumption and difficulty in expanding capacity and increasing production due to limited plant space.

[0011] In order to solve the above technical problems, the utility model adopts the following technical solutions, the horizontal dryer includes:

[0012] Feeding section;

[0013] Return material section,

[0014] The drying section is arranged between the feeding section and the returning section; the drying section includes at least one drying area, wherein a plurality of layers of conveying components are arranged from top to bottom in the drying area, and partitions are arranged between the conveying components; the drying section includes:

[0015] The first temperature zone is located at the portion of the uppermost conveying assembly close to the feed section;

[0016] The second temperature zone is located in the upper and lower adjacent conveying components close to the return section;

[0017] The third temperature zone is located in the upper and lower adjacent conveying components close to the feeding section;

[0018] The cooling zone is located in the bottom conveying assembly near the discharge port;

[0019] The first temperature zone, the second temperature zone, the third temperature zone, and the cooling zone are arranged in an S shape; the air paths of the first temperature zone, the second temperature zone, the third temperature zone, and the cooling zone are independent of each other; and the temperature and air volume of each temperature zone can be controlled independently.

[0020] In response to the problems existing in the prior art, the utility model provides a four-layer partitioned horizontal dryer to meet the needs of large production capacity. It can better distribute the air temperature and air volume to improve drying efficiency, save heat energy while ensuring the uniformity of material moisture, and is easy to maintain. In addition, it can cool the dried material, saving investment and operation and maintenance costs of cooling equipment.

[0021] The utility model is a multi-layer partitioned horizontal dryer, which adopts a multi-layer design and a matching cooling partition system, solving the technical problems of the existing horizontal dryer such as unreasonable temperature zone division, high energy consumption, and difficulty in expanding capacity and increasing production due to limited factory space.

[0022] To solve the technical problem of how to realize the first temperature zone, the utility model adopts the following technical scheme, the first temperature zone includes first drying room, and first air inlet, first air outlet are arranged on both sides of first drying room,

[0023] The third circulating fan is arranged on the first air inlet; the first air inlet is located between the upper and lower conveying belts of the uppermost conveying assembly;

[0024] The second wet air exhaust door and the first air outlet are arranged on the first air outlet; the first air outlet is located above the upper conveying belt of the uppermost conveying assembly;

[0025] The first air duct is arranged above the first drying room, and the first air duct is communicated with the first air outlet and the first air inlet respectively; the second air supplementing opening is arranged on the first air duct; the third filter screen assembly and the fourth filter assembly are arranged in the first air duct.

[0026] To solve the technical problem of how to realize the second temperature zone, the utility model adopts the following technical scheme, the second temperature zone includes second drying room, and second air inlet, second air outlet are arranged on both sides of second drying room,

[0027] The sixth circulating fan and the seventh circulating fan are arranged on the second air inlet; the second air inlet one and the second air inlet two are arranged on the second air inlet; the second air inlet one is located above the upper conveying belt of the upper conveying assembly; the second air inlet two is located below the upper conveying belt of the lower conveying assembly;

[0028] The fourth wet air exhaust door and the second air outlet are arranged on the second air outlet; the second air outlet is located between the upper conveying belts of the upper conveying assembly and the lower conveying assembly;

[0029] The second air duct is arranged above the second drying room, and the second air duct is communicated with the second air outlet and the second air inlet respectively; the fourth air supplementing opening is arranged on the second air duct; the seventh filter screen assembly and the eighth filter screen assembly are arranged in the second air duct.

[0030] To solve the technical problem of how to realize the third temperature zone, the utility model adopts the following technical scheme, the third temperature zone includes third drying room, and third air inlet, third air outlet are arranged on both sides of third drying room,

[0031] The third air inlet is located below the first air inlet; the first circulating fan and the second circulating fan are arranged on the third air inlet; the third air inlet one and the third air inlet two are arranged on the third air inlet; the third air inlet one is located above the upper conveying belt of the upper conveying assembly; the third air inlet two is located above the upper conveying belt of the lower conveying assembly;

[0032] The first exhaust air door and the third air outlet are arranged on the third air outlet channel.

[0033] The third air channel is arranged above the third drying chamber and is communicated with the third air outlet channel and the third air inlet channel.

[0034] To solve the technical problem of insufficient drying in three temperature zones, the drying section further comprises a fourth temperature zone, and the fourth temperature zone is located at the part of the upper and lower adjacent conveying assemblies close to the material returning section.

[0035] To solve the technical problem of how to realize the fourth temperature zone, the fourth temperature zone comprises a fourth drying chamber and fourth air inlet channels and fourth air outlet channels arranged on both sides of the fourth drying chamber.

[0036] The fourth circulating fan and the fifth circulating fan are arranged on the fourth air inlet channel. The first air inlet and the second air inlet are arranged on the fourth air inlet channel. The first air inlet is located above the upper conveying belt of the corresponding upper conveying assembly. The second air inlet is located below the upper conveying belt of the corresponding lower conveying assembly.

[0037] The third exhaust air door and the fourth air outlet are arranged on the fourth air outlet channel. The fourth air outlet is located between the upper conveying belts of the corresponding upper and lower conveying assemblies.

[0038] The fourth air channel is arranged above the fourth drying chamber and is communicated with the fourth air outlet channel and the fourth air inlet channel. The third air supplement opening is arranged on the fourth air channel. The fifth filter assembly and the sixth filter assembly are arranged in the fourth air channel.

[0039] To solve the technical problem of how to realize the cooling zone, the cooling zone comprises a cooling chamber and cooling air inlet channels and cooling air outlet channels arranged on both sides of the cooling chamber.

[0040] The cooling air inlet channel is located below the third air inlet channel. The cooling air inlet and the air supplement opening are arranged on the cooling air inlet channel. The cooling air inlet is located above the upper conveying belt of the lowermost conveying assembly.

[0041] The cooling air outlet channel of the cooling zone shares the third air outlet channel of the third temperature zone. The cooling air outlet is arranged on the third air outlet channel and is located above the upper conveying belt of the lowermost conveying assembly.

[0042] To solve the technical problem of how to arrange the drying area, the utility model discloses the following technical scheme, the orientation of the air inlet of adjacent drying area is opposite arrangement.

[0043] The orientation of the air outlet of adjacent drying area is opposite arrangement.

[0044] To solve the technical problem of the existing drying machine exhaust air door protruding on the upper machine box, the utility model discloses the following technical scheme, the upper machine box of drying section is the asymmetric structure of one side low and one side high, and the exhaust air door and filter screen maintenance opening are arranged on the upper machine box of lower side, the top of exhaust air door is flush with the top of upper machine box.

[0045] The opening of exhaust air door and air supplementing opening can be adjusted.

[0046] To solve the technical problem that the design of many horizontal drying machines lacks consideration for the convenience and cost of later maintenance, such as insufficient internal maintenance space, difficult disassembly and assembly of maintenance opening, difficult cleaning of accumulated powder, etc., which indirectly leads to increased long-term use cost, shortened life cycle, high maintenance cost and difficulty, the utility model discloses the following technical scheme, the filter screen assembly adopts a multi-layer foldable structure, and the upper machine box top of the drying section is provided with a filter screen maintenance opening, so that filter screen replacement can be realized without stopping the machine.

[0047] The utility model adopts the asymmetric drying section upper machine box structure, and the arrangement of exhaust air door makes full use of the space.

[0048] The filter screen assembly of the utility model is matched with a multi-layer filter screen design, so that filter screen replacement can be realized without stopping the machine.

[0049] To solve the technical problem of how to heat air, the utility model discloses the following technical scheme, a heating device is arranged on the drying section, and the heating device is a heat exchanger or a burner, which meets the needs of different manufacturers. DRAWINGS

[0050] Figure 1 It is the front view plane diagram of the horizontal drying machine of the utility model;

[0051] Figure 2 It is the isometric view of the horizontal drying machine of the utility model;

[0052] Figure 3 It is the temperature zone distribution diagram of the horizontal drying machine of the utility model;

[0053] Figure 4 It is the partition schematic diagram of other node of the utility model;

[0054] Figure 5 It is the first temperature zone I three-dimensional schematic diagram of the utility model;

[0055] Figure 6 is the third temperature zone III and cooling zone V of the utility model three-dimensional schematic view;

[0056] Figure 7 is the third temperature zone III and cooling zone V of the utility model three-dimensional schematic view;

[0057] Figure 8 is the fourth temperature zone IV of the utility model three-dimensional schematic view;

[0058] Figure 9 is the A-A section view of Figure 3 ;

[0059] Figure 10 is the B-B section view of Figure 3 ;

[0060] Figure 11 is the C-C section view of Figure 3 ;

[0061] Figure 12 is the D-D section view of Figure 3 ;

[0062] Figure 13 is the A-A section view of the natural gas heat source of Figure 9 ;

[0063] In the drawing: 1 - feed section;2 - spreader;3 drying section;4 - circulating fan;5 - filter screen;6 - wet air door;7 - air supply opening;8 - partitioning plate;9 - material;10 - conveying belt;11 - return material section;12 - adjustable foot;13 - discharge port;

[0064] I first temperature zone;I-1 first air inlet;I-2 first air outlet;I-3 first air outlet;I-4 first air outlet;6-2 second wet air door;7-2 second air supply opening;14-3 third heat exchanger;4-3 third circulating fan;5-3 third filter screen assembly;5-4 fourth filter screen;

[0065] second temperature zone II;II-1 second air inlet;II-2 second air inlet;II-3 second air inlet;II-4 second air outlet;II-5 second air outlet;6-4 fourth wet air door;7-4 fourth air supply opening;14-5 fifth heat exchanger;14-6 sixth heat exchanger;4-6 sixth circulating fan;4-7 seventh circulating fan;5-7 seventh filter screen assembly;5-8 eighth filter screen assembly;

[0066] Third temperature zone III; III-1 Third air inlet duct; III-2 Third air inlet 1; III-3 Third air inlet 2; III-4 Third air outlet duct; III-5 Third air outlet; 6-1 First dehumidification damper; 7-1 First supply air inlet; 14-1 First heat exchanger; 14-2 Second heat exchanger; 4-1 First circulation fan; 4-2 Second circulation fan; 5-1 First filter assembly; 5-2 Second filter assembly;

[0067] Fourth temperature zone IV; IV-1 Fourth air inlet duct; IV-2 Fourth air inlet 1; IV-3 Fourth air inlet 2; IV-4 Fourth air outlet duct; IV-5 Fourth air outlet; 6-3 Dehumidification damper; 7-3 Third air supply inlet; 14-4 Fourth heat exchanger; 4-4 Fourth circulation fan; 4-5 Fifth circulation fan; 5-5 Fifth filter assembly; 5-6 Sixth filter assembly;

[0068] Cooling zone V; V-1 cooling zone air inlet; V-2 cooling air supply port; V-3 cooling air inlet; V-4 cooling air outlet;

[0069] Represents the direction of hot air; Represents the direction of circulating wind; Represents the direction of cold wind; Represents the first temperature zone replenishing air; Represents dehumidification in the first temperature zone; Represents the air intake of the cooling zone. DETAILED DESCRIPTION

[0070] The present invention will be further described below with reference to the accompanying drawings.

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings selected for use in the embodiments.

[0072] like Figure 1 and Figure 2 As shown, the horizontal dryer has a four-layer partition structure, including a feeding section 1, a spreader 2, a drying section 3, a return section 11 and an adjustable leg 12. In one embodiment, the spreader 2 is a closed servo spreader, which can be replaced by a five-point variable frequency spreader. Specifically, the closed servo spreader can be replaced by an open variable frequency spreader.

[0073] The drying section 3 is located between the feed section 1 and the return section 11. The drying section 3 includes at least one drying zone, within which are arranged several layers of conveyor assemblies 10 from top to bottom. The conveyor assemblies 10 are preferably conveyor belts. Partitions 8 are provided between the conveyor assemblies 10.

[0074] Each drying zone is equipped with a circulating fan 4, a filter access 5, a moisture-removal damper 6, and a supply air vent 7 at the top. The lower drying zone is divided into four levels by windshield baffles 8, each equipped with a conveyor assembly 10. Material 9 passes through a spreader 2 and falls into the feed section 1, where it is evenly spread on the conveyor belt. It then enters the drying section 3 for drying, dropping to the next level at the feed and return sections before being discharged through a discharge port 13 at the bottom of the feed section.

[0075] In one embodiment, the dehumidification damper 6 can be opened manually or automatically. In one embodiment, the air supply port 7 can be opened manually or automatically.

[0076] In one embodiment, the filter assembly 5 adopts a multi-layer foldable design, and a filter inspection port 5 is provided on the top of the upper chassis of the drying section 3 to enable the filter to be pulled out and replaced without stopping the machine.

[0077] In one embodiment, the upper chassis of the drying section 3 uses an asymmetric structure. Under the structure, the upper plane of the dehumidification damper 6 is flush with the top surface of the drying section 3, which effectively improves space utilization and facilitates the arrangement of the air network.

[0078] In one embodiment, the circulating fan 4 uses a motor direct-connected structure, which has high transmission efficiency and low failure rate. The circulating fan can also be replaced by a belt drive.

[0079] According to the characteristics of the material being dried, such as Figure 3 As shown, the drying section 3 is divided into five zones: a first temperature zone I, a second temperature zone II, a third temperature zone III, a fourth temperature zone IV, and a cooling zone V. Each zone is separated by a partition 8 and a windshield. The portion of the first layer near the feed section is designated as the first temperature zone I; the portions of the first and second layers near the return section are designated as the second temperature zone II; the portions of the second and third layers near the feed section are designated as the third temperature zone III; the portions of the third and fourth layers near the return section are designated as the fourth temperature zone IV; and the portion of the fourth layer near the feed section outlet is designated as the cooling zone V. The air paths of the first, second, third, and fourth temperature zones I, II, III, and IV are independent of one another, while cooling zone V and third temperature zone III share an exhaust air path. Each temperature zone can independently control temperature and air volume. The first, second, third, and cooling zones are arranged in an S-shape.

[0080] like Figure 4 As shown, the four-layer zoned horizontal dryer is not limited to four drying sections, and can be a combination of any number of A and B sections.

[0081] like Figure 5 and Figure 10As shown, the first temperature zone I is provided with a first air inlet channel I-1, a first air inlet I-2, a first air outlet channel I-3, a first air outlet I-4, a second exhaust air door 6-2, a second air supplementing port 7-2, a third heat exchanger 14-3, a third circulating fan 4-3, a third filter screen assembly 5-3 and a fourth filter screen assembly 5-4.

[0082] The first temperature zone includes a first drying chamber. The first drying chamber is provided with a first air inlet channel I-1 and a first air outlet channel I-3 on both sides.

[0083] The third circulating fan 4-3 is arranged on the first air inlet channel I-1; the first air inlet I-2 is arranged on the first air inlet channel I-1; and the first air inlet I-2 is located between the upper and lower conveying belts of the uppermost conveying assembly.

[0084] The second exhaust air door 6-2 and the first air outlet I-4 are arranged on the first air outlet channel; and the first air outlet I-4 is located above the upper conveying belt of the uppermost conveying assembly.

[0085] The first air outlet channel I-3 and the first air inlet channel I-1 are connected in communication through a first air channel arranged above the first drying chamber; the second air supplementing port 7-2 is arranged on the first air channel; and the third filter screen assembly 5-3 and the fourth filter screen assembly 5-4 are arranged in the first air channel.

[0086] The third circulating fan 4-3 drives the air flow, the air is heated by the third heat exchanger 14-3, and then sequentially passes through the first air inlet channel I-1, the first air inlet I-2, enters the space between the first layer conveying belt 10 and the partition plate 8, and then the hot air flow passes through the material 9 on the first layer conveying belt upwards, and then enters the air outlet channel I-3 through the first air outlet I-4. The second exhaust air door 6-2 and the second air supplementing port 7-2 are adjusted according to the humidity of the hot air flow, part of the hot air in the first air outlet channel I-3 is discharged as tail gas EX1 from the dryer, the remaining air is supplemented with new air MU1 and mixed, and then filtered through the third filter screen assembly 5-3 and the fourth filter screen assembly 5-4 to enter the next cycle.

[0087] As shown in Figure 6 and Figure 12 The second temperature zone II is provided with a second air inlet channel II-1, a second air inlet I-2, a second air inlet II-3, a second air outlet channel II-4, a second air outlet II-5, a fourth exhaust air door 6-4, a fourth air supplementing port 7-4, a fifth heat exchanger 14-5 and a sixth heat exchanger 14-6, a sixth circulating fan 4-6 and a seventh circulating fan 4-7, a seventh filter screen assembly 5-7 and an eighth filter screen assembly 5-8.

[0088] The second temperature zone includes a second drying chamber. The second drying chamber is provided with a second air inlet channel II-1 and a second air outlet channel II-4 on both sides.

[0089] The sixth circulating fan 4-6 and the seventh circulating fan 4-7 are arranged on the second air inlet channel II-1; the second air inlet channel II-1 is provided with a second air inlet one II-2 and a second air inlet two II-3; the second air inlet one II-2 is located above the upper layer conveying belt of the upper layer conveying assembly; and the second air inlet two II-2 is located below the upper layer conveying belt of the lower layer conveying assembly.

[0090] The fourth exhaust air door 6-4 and the second air outlet II-5 are arranged on the second air outlet channel II-4; and the second air outlet II-5 is located between the upper layer conveying belt of the upper layer conveying assembly and the upper layer conveying belt of the lower layer conveying assembly.

[0091] The second air channel is arranged above the second drying chamber and is connected with the second air outlet channel II-4 and the second air inlet channel II-1; the fourth air supplementing opening 7-4 is arranged on the second air channel; and the seventh filter screen assembly 5-7 and the eighth filter screen assembly 5-8 are arranged in the second air channel.

[0092] The sixth circulating fan 4-6 and the seventh circulating fan 4-7 are arranged on the second air inlet channel II-1; the second air inlet channel II-1 is provided with a second air inlet one II-2 and a second air inlet two II-3; the second air inlet one II-2 is located above the upper layer conveying belt of the upper layer conveying assembly; and the second air inlet two II-2 is located below the upper layer conveying belt of the lower layer conveying assembly.

[0093] As shown in Figure 7 and Figure 9 The third air inlet channel III-1, the third air inlet one III-2, the third air inlet two III-3, the third air outlet channel III-4, the third air outlet III-5, the first exhaust air door 6-1, the first air supplementing opening 7-1, the first heat exchanger 14-1, the second heat exchanger 14-2, the first circulating fan 4-1 and the second circulating fan 4-2, the first filter screen assembly 5-1 and the second filter screen assembly 5-2 are arranged in the third temperature zone III.

[0094] The third temperature zone III includes a third drying chamber; the third air inlet channel III-1 and the third air outlet channel III-4 are arranged on both sides of the third drying chamber.

[0095] The third air inlet channel III-1 is located below the first air inlet channel I-1. The first circulating fan 4-1 and the second circulating fan 4-2 are arranged on the third air inlet channel III-1. The third air inlet channel III-1 is provided with a third air inlet one III-2 and a third air inlet two III-3. The third air inlet one III-2 is located above the upper conveying belt of the upper conveying assembly. The third air inlet two III-3 is located above the upper conveying belt of the lower conveying assembly.

[0096] The third air outlet channel III-4 is provided with the first dehumidification air door 6-1 and the third air outlet III-5. The third air outlet III-5 is located between the upper conveying assembly and the lower conveying assembly.

[0097] The third air outlet channel III-4 is provided with the first dehumidification air door 6-1 and the third air outlet III-5. The third air outlet III-5 is located between the upper conveying assembly and the lower conveying assembly.

[0098] The third air outlet channel III-4 is provided with the first dehumidification air door 6-1 and the third air outlet III-5. The third air outlet III-5 is located between the upper conveying assembly and the lower conveying assembly.

[0099] In one embodiment, the drying section 3 further comprises a fourth temperature zone. The fourth temperature zone is located at the part of the upper and lower adjacent conveying assemblies close to the material returning section. Specifically, as shown in Figure 8 and Figure 11 The fourth temperature zone IV is provided with a fourth air inlet channel IV-1, a fourth air inlet one IV-2, a fourth air inlet two IV-3, a fourth air outlet channel IV-4, a fourth air outlet IV-5, a third dehumidification air door 6-3, a third air supplement port 7-3, a fourth heat exchanger 14-4, a fourth circulating fan 4-4 and a fifth circulating fan 4-5, a fifth filter screen assembly 5-5 and a sixth filter screen assembly 5-6.

[0100] The fourth temperature zone comprises a fourth drying chamber. The fourth air inlet channel IV-1 and the fourth air outlet channel IV-4 are arranged on the two sides of the fourth drying chamber. The third air outlet channel III-4 is provided with the first dehumidification air door 6-1 and the third air outlet III-5. The third air outlet III-5 is located between the upper conveying assembly and the lower conveying assembly.

[0101] The fourth circulation fan 4-4 and the fifth circulation fan 4-5 are set on the fourth air inlet duct IV-1; the fourth air inlet 1 IV-2 and the fourth air inlet 2 IV-3 are set on the fourth air inlet duct IV-1; the fourth air inlet 1 IV-2 is located above the upper conveyor belt of the corresponding upper conveying assembly; the fourth air inlet 2 IV-3 is located below the upper conveyor belt of the corresponding lower conveying assembly.

[0102] The fourth air outlet Ⅳ-4 is provided with a third dehumidification damper 6-3 and a fourth air outlet Ⅳ-5; the fourth air outlet Ⅳ-5 is located between the upper conveyor belts of the corresponding upper and lower conveyor assemblies.

[0103] A fourth air duct is provided above the fourth drying chamber, and the fourth air duct is connected to the fourth air outlet duct IV-1 and the fourth air inlet duct IV-4 respectively; a third air supply port 7-3 is provided on the fourth air duct; a fifth filter assembly 5-5 and a sixth filter assembly 5-6 are provided in the fourth air duct.

[0104] Air is driven by the fourth circulation fan 4-4 and the fifth circulation fan 4-5. The air is heated by the fourth heat exchanger 14-4 and enters the fourth air inlet duct IV-1. The airflow is split into two paths. One path enters the space above the third conveyor belt 10 and between the partition plate 8, passing downward through the material 9 on the third conveyor belt 10. The other path enters the space below the fourth conveyor belt 10 and between the partition plate 8, passing upward through the material 9 on the fourth conveyor belt 10. After passing through the material 9, the two airflows converge in the space between the two conveyor belts and enter the fourth outlet duct IV-4 through the fourth outlet duct IV-5. The openings of the third dehumidification damper 6-3 and the third supply air inlet 7-3 are adjusted according to the humidity of the hot air. Part of the hot air in the fourth outlet duct IV-4 is discharged from the dryer as exhaust gas EX4. The remaining air is replenished with fresh air MU4, mixed, and filtered through the fifth and sixth filter assemblies 5-5 and 5-6 before entering the next cycle.

[0105] like Figure 7 As shown, the cooling zone V is located below the third temperature zone III and is provided with a cooling zone air inlet duct V-1, a cooling air supply port V-2, a cooling air inlet V-3, and a cooling air outlet V-4.

[0106] The cooling area includes a cooling chamber, and cooling air inlet duct V-1 and cooling air outlet duct are arranged on both sides of the cooling chamber.

[0107] The cooling air inlet duct V-1 is located below the third air inlet duct III-1, and a cooling air inlet port V-3 and an air supply port V-2 are provided on the cooling air inlet duct V-1; the cooling air inlet port V-3 is located above the upper conveyor belt of the lowest conveying assembly.

[0108] The cooling zone V and the third temperature zone III share a third air outlet duct III-4. A cooling air outlet V-4 is provided on the third air outlet duct III-4, and the cooling air outlet is located above the upper conveyor belt of the lowest layer feeding assembly.

[0109] Under the negative pressure provided by the first circulation fan 4-1 and the second circulation fan 4-2, the cold air enters the cooling zone air inlet Ⅴ-1 from the cooling air supply port Ⅴ-2 with adjustable opening, and enters the space above the fourth-layer conveyor belt 10 and between the partition partition 8 through the cooling air inlet Ⅴ-3, and then passes downward through the material 9 on the fourth-layer conveyor belt 10, enters the third air outlet Ⅲ-4 through the cooling air outlet Ⅴ-4, mixes with the air flow from the third air outlet Ⅲ-5, and participates in the circulation of the third temperature zone Ⅲ.

[0110] The heat source of the four-layer horizontal dryer is not limited to steam and can be replaced by natural gas heat source. Take the AA section as an example. Figure 7 and Figure 13 As shown, the third temperature zone III is equipped with a third air inlet duct III-1, a third air inlet port 1 III-2, a third air inlet port 2 III-3, a third air outlet duct III-4, a third air outlet III-5, a first dehumidification damper 6-1, a first air supply port 7-1, a burner 16, a mixing plate 15, a first circulation fan 4-1, a second circulation fan 4-2, a first filter assembly 5-1, and a second filter assembly 5-2. Driven by the first and second circulation fans 4-1, 4-2, air enters the third air inlet duct III-1. The airflow is divided into two paths: one path passes through the upper third air inlet port 1 III-2, enters the space above the second conveyor belt 10 and between the partition plate 8, and then flows downward through the material 9 on the second conveyor belt 10. The other path passes through the third air inlet port 2 III-3, enters the space below the third conveyor belt 10 and between the partition plate 8, and then flows upward through the material 9 on the third conveyor belt 10. After passing through material 9, the two airflows converge in the space between the two conveyor belts and enter the third air outlet duct III-4 through the third air outlet III-5. The openings of the first dehumidification damper 6-1 and the first supply air port 7-1 are adjusted according to the humidity of the hot air. Part of the hot air in the third air outlet duct III-4 is discharged from the dryer as exhaust gas EX3, while the remaining air is replenished with fresh air MU3. The air is heated by the burner 16, filtered by the first and second filter assemblies 5-1 and 5-2, and evenly dispersed by the mixing plate 15 before entering the next cycle.

[0111] In one embodiment, the heat exchanger 14 uses an ultra-thin structure, and different numbers are flexibly combined according to actual conditions. The top is smooth and easy to clean the accumulated powder. Using the ultra-thin heat exchanger, the accumulated powder is easy to clean, and the top is smooth and does not accumulate powder. The number of stacked ultra-thin heat exchangers can be arbitrarily combined according to actual needs. The ultra-thin heat exchanger can be replaced by a common heat exchanger. The four-layer partitioned horizontal dryer of the utility model can meet the needs of large capacity, can better distribute wind temperature and wind volume, improve drying efficiency, save heat energy, ensure uniformity of material moisture, and is convenient to maintain, and can cool the dried material, save investment and operation and maintenance cost of cooling equipment.

[0112] The utility model discloses a multilayer partitioned horizontal dryer, adopts multilayer design and matched cooling partition system, solves the technical problem of unreasonable temperature zone division, high energy consumption and difficult expansion of production capacity of existing horizontal dryer.

[0113] The above-mentioned embodiments are only for illustrating the technical features and concepts of the utility model, and the purpose is to enable the skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essential characteristics of the utility model and the embodiments shall be covered within the protection scope of the utility model.

Claims

1. A horizontal dryer, characterized in that it comprises: a feeding section; a returning section, a drying section arranged between the feeding section and the returning section; the drying section comprises at least one drying zone, a plurality of layers of conveying assemblies arranged from top to bottom in the drying zone, and a plurality of partitions arranged between the conveying assemblies; the drying section comprises: a first temperature zone located at a portion of the uppermost layer of conveying assemblies close to the feeding section; a second temperature zone located at a portion of the upper and lower adjacent conveying assemblies close to the returning section; a third temperature zone located at a portion of the upper and lower adjacent conveying assemblies close to the feeding section; a cooling zone located at a portion of the lowermost layer of conveying assemblies close to the discharge port; the first temperature zone, the second temperature zone, the third temperature zone and the cooling zone are arranged in an S shape; the air paths of the first temperature zone, the second temperature zone, the third temperature zone and the cooling zone are independent of each other; the temperature and air volume of each temperature zone can be controlled independently. The first temperature zone comprises a first drying chamber, and a first air inlet channel and a first air outlet channel arranged on both sides of the first drying chamber; a third circulating fan is arranged on the first air inlet channel; a first air inlet is arranged on the first air inlet channel; the first air inlet is located between the upper and lower conveying belts of the uppermost layer of conveying assemblies; a second wet air exhaust door and a first air outlet are arranged on the first air outlet channel; the first air outlet is located above the upper conveying belt of the uppermost layer of conveying assemblies; a first air channel is arranged above the first drying chamber, and the first air channel is in communication with the first air outlet channel and the first air inlet channel respectively; a second air supplementing port is arranged on the first air channel; a third filter screen assembly and a fourth filter assembly are arranged in the first air channel. The second temperature zone comprises a second drying chamber, and a second air inlet channel and a second air outlet channel arranged on both sides of the second drying chamber; a sixth circulating fan and a seventh circulating fan are arranged on the second air inlet channel; a second air inlet one and a second air inlet two are arranged on the second air inlet channel; the second air inlet one is located above the upper conveying belt of the upper layer of conveying assemblies; the second air inlet two is located below the upper conveying belt of the lower layer of conveying assemblies; a fourth wet air exhaust door and a second air outlet are arranged on the second air outlet channel; the second air outlet is located between the upper conveying belts of the upper layer of conveying assemblies and the lower layer of conveying assemblies; a second air channel is arranged above the second drying chamber, and the second air channel is in communication with the second air outlet channel and the second air inlet channel respectively; a fourth air supplementing port is arranged on the second air channel; a seventh filter screen assembly and an eighth filter screen assembly are arranged in the second air channel. The third temperature zone comprises a third drying chamber, and a third air inlet channel and a third air outlet channel arranged on both sides of the third drying chamber; the third air inlet channel is located below the first air inlet channel; a first circulating fan and a second circulating fan are arranged on the third air inlet channel; a third air inlet one and a third air inlet two are arranged on the third air inlet channel; the third air inlet one is located above the upper conveying belt of the upper layer of conveying assemblies; the third air inlet two is located above the upper conveying belt of the lower layer of conveying assemblies; 2. The horizontal dryer according to claim 1, characterized in that a first wet air exhaust door and a third air outlet are arranged on the third air outlet channel; the third air outlet is located between the upper layer of conveying assemblies and the lower layer of conveying assemblies; ​ ​ ​ 3. The horizontal dryer according to claim 1, characterized in that, ​ ​ ​ ​ 4. The horizontal dryer according to claim 2, characterized in that ​ ​ ​ The third drying chamber is provided with a third air duct above the third drying chamber, the third air duct is communicated with the third air outlet and the third air inlet respectively; a first air supplementing port is arranged on the third air duct; a first filter screen assembly and a second filter screen assembly are arranged in the third air duct.

5. The horizontal dryer according to claim 1, characterized in that, The drying section further comprises a fourth temperature zone, and the fourth temperature zone is located at a part of the upper and lower adjacent conveying assemblies close to the material returning section.

6. The horizontal dryer according to claim 5, characterized in that The fourth temperature zone comprises a fourth drying chamber, and a fourth air inlet and a fourth air outlet arranged on both sides of the fourth drying chamber. A fourth circulating fan and a fifth circulating fan are arranged on the fourth air inlet; a first fourth air inlet and a second fourth air inlet are arranged on the fourth air inlet; the first fourth air inlet is located above the upper conveying belt of the corresponding upper conveying assembly; the second fourth air inlet is located below the upper conveying belt of the corresponding lower conveying assembly. A third dehumidifying air door and a fourth air outlet are arranged on the fourth air outlet; the fourth air outlet is located between the upper conveying belts of the corresponding upper and lower conveying assemblies; A fourth air duct is arranged above the fourth drying chamber, the fourth air duct is communicated with the fourth air outlet and the fourth air inlet respectively; a third air supplementing port is arranged on the fourth air duct; a fifth filter screen assembly and a sixth filter screen assembly are arranged in the fourth air duct.

7. The horizontal dryer according to claim 4, characterized in that The cooling section comprises a cooling chamber, and a cooling air inlet and a cooling air outlet arranged on both sides of the cooling chamber; The cooling air inlet is located below the third air inlet, and a cooling air inlet and an air supplementing port are arranged on the cooling air inlet; the cooling air inlet is located above the upper conveying belt of the lowermost conveying assembly; The cooling air outlet of the cooling section shares the third air outlet of the third temperature zone; a cooling air outlet is arranged on the third air outlet, and the cooling air outlet is located above the upper conveying belt of the lowermost conveying assembly.

8. The horizontal dryer according to claim 4, characterized in that The directions of the air inlets of the adjacent drying sections are opposite to each other; The directions of the air outlets of the adjacent drying sections are opposite to each other.

9. The horizontal dryer according to claim 4, characterized in that, The upper machine box of the drying section is a non-symmetrical structure with one side being lower and the other side being higher; a dehumidifying air door and a filter screen maintenance port are arranged on the lower side of the upper machine box; the top of the dehumidifying air door is flush with the top of the upper machine box; The opening degrees of the dehumidifying air door and the air supplementing port are adjustable; The filter screen assembly adopts a multi-layer foldable structure; a filter screen maintenance port is arranged on the top of the upper machine box of the drying section, so that the filter screen replacement can be realized without stopping the machine.

10. The horizontal dryer according to claim 4, characterized in that A heating device is arranged on the drying section, and the heating device is a heat exchanger or a burner.

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