Tower-shaped compound transverse flow corn straw drying device

Abstract

The utility model discloses a tower-shaped compound cross-flow corn straw drying device which comprises a cylindrical drying rack, a slewing bearing, a spiral blade, an inner screen piece, an outer screen piece and the like. A rotating shaft of the spiral blade is mounted on the pivotal bearing; the inner screen piece and the outer screen piece are axially arranged along the rotating shaft of the spiral blade; a feeding hole is formed between the inner screen piece and the outer screen piece at the upper part; a discharge hole is formed between the inner screen piece and the outer screen piece at the lower part; uniform air holes are formed in the inner screen piece and the outer screen piece; upper and lower ends of the inner screen piece are air inlets; the air inlet is communicated with a hot-blast stove air outlet pipeline through an air supply pipeline. By adopting the tower-shaped structure, the gravity can be effectively utilized, the load of a motor is reduced, materials can be uniformly distributed through the spiral blades, the drying efficiency can be greatly improved through the compound cross-flow drying method, meanwhile, the recycled hot air is used for secondary heating to dry corn straws, and the energy consumption is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of biomass fuel production, and relates to a corn stalk drying device, in particular to a tower-shaped compound cross-flow corn stalk drying device, which is particularly suitable for large-scale corn stalk drying. Background Art

[0002] Corn stalks are the main biomass resources in my country. Processing corn stalks into solid biomass fuel can not only effectively utilize agricultural resources and reduce environmental pollution, but also effectively alleviate the problem of energy shortage. Environmental protection, energy saving, and low-carbon emission reduction are of great significance to promoting the application of biomass energy and the sustainable development of agriculture.

[0003] The moisture content of corn straw during autumn harvest is generally not less than 40%, but the solid fuel production process requires that the moisture content of corn straw should be around 15%. In order to meet the "scale benefits" of corn straw solid fuel processing enterprises, the design production capacity of corn straw drying equipment should reach 5t / h.

[0004] Since the moisture content of corn stalks is much higher than that of other straws, the drying cycle of corn stalks dried with traditional drying equipment is long and the output is limited. Due to seasonal influences, it is difficult to ensure year-round production. At the same time, there are many disadvantages such as high energy consumption and low efficiency. Summary of the invention

[0005] The utility model discloses a tower-shaped compound cross-flow corn stalk drying device to solve the problems of high energy consumption, long drying cycle, low efficiency, limited output and difficulty in ensuring year-round production due to seasonal influences in the prior art.

[0006] The utility model comprises a cylindrical drying machine frame, a rotary bearing, spiral blades, an inner screen, an outer screen, a reduction motor, a hot air furnace and an air supply pipeline; the rotating shaft of the spiral blades is installed on the rotary bearing; the inner screen and the outer screen are arranged and installed along the rotating axis of the spiral blades; a feed inlet is formed between the upper inner screen and the outer screen; a discharge outlet is formed between the lower inner screen and the outer screen; uniform air holes are arranged on the inner screen and the outer screen; the upper and lower ends of the inner screen are air inlets; the air inlet is connected with the hot air furnace outlet pipeline through the air supply pipeline; the drying hot air enters the inner screen through the hot air furnace outlet, the air supply pipeline and the air inlet, and is converted into cross-flow hot air for drying straw through the uniform air holes on the inner screen; the uniform air holes on the outer screen become the discharge channel of the moisture from the drying of the straw.

[0007] An optimization scheme of the utility model also includes a rotary distributor, which includes a distribution baffle and a distribution paddle; distribution openings are evenly distributed on the distribution baffle; the distribution paddle and the distribution baffle are installed on the upper end of the rotating shaft of the spiral blade; the cross-shaped distribution paddle is installed on the upper part of the distribution baffle; the cross-shaped distribution paddle is coaxially installed and connected with the spiral blade; the reduction motor is connected to the rotating shaft of the spiral blade; the reduction motor drives the spiral blade and the rotary distributor to rotate along the slewing bearing, and the corn stalks are input from the feed port and enter the spiral blades through the rotary distributor. The rotary distributor effectively prevents the corn stalks from piling up and clumping; the corn stalks are evenly distributed on the spiral blades, and the drying hot air can pass through the gaps between the corn stalks on the spiral blades more evenly.

[0008] An optimized solution of the utility model also includes a hot air partition, a waste heat collection hood, and a waste heat recovery pipeline; the hot air partition is installed in the inner screen, and the hot air partition divides the cylindrical drying machine frame into an upper drying zone 1 and a lower drying zone 2; the upper end of the inner screen is the air inlet of the drying zone 1; the lower end of the inner screen is the air inlet of the drying zone 2; the waste heat collection hood is installed in the drying zone 2 below the hot air partition; the waste heat collection hood has a waste heat recovery port, and the waste heat recovery port on the waste heat collection hood is connected to the hot air furnace air inlet pipeline through the waste heat recovery pipeline. The hot air after drying is recycled to the hot air furnace air inlet through the waste heat recovery port and the waste heat recovery pipeline.

[0009] The positive effects of the utility model are: the tower structure can effectively utilize gravity and reduce the motor load, the spiral blades can make the material evenly distributed, the compound cross-flow drying method can greatly improve the drying efficiency, and the recycled hot air is used for secondary heating to dry corn stalks, which greatly reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the rotary distributor of the utility model;

[0012] In the figure: 1 cylindrical drying rack, 2 rotary distributor, 2.1 distribution baffle, 2.2 distribution port, 2.3 distribution paddle, 3 rotary bearing, 4 spiral blade, 5 inner screen, 6 outer screen, 7 reduction motor, 8 hot air furnace, 9 air supply pipeline, 10 waste heat recovery pipeline, 11 hot air partition, 12 waste heat collecting hood; A drying zone 1, B drying zone 2, C feed port, D discharge port, E zone 1 air inlet, F zone 2 air inlet, G waste heat recovery port. DETAILED DESCRIPTION

[0013] An embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0014] The utility model is implemented as follows Figure 1, Figure 2 As shown, it includes a cylindrical drying machine frame 1, a rotary distributor 2, a rotary bearing 3, spiral blades 4, an inner screen 5, an outer screen 6, a reduction motor 7, a hot air furnace 8, an air supply pipeline 9, a waste heat recovery pipeline 10, a hot air partition 11, and a waste heat collecting hood 12.

[0015] like Figure 1 As shown, the rotating shaft of the spiral blade 4 is installed on the rotary bearing 3; the rotary distributor 2 is installed on the upper end of the rotating shaft of the spiral blade 4; the inner screen 5 and the outer screen 6 are arranged and installed along the rotating axis of the spiral blade 4; the feed port C is formed between the inner screen 5 and the outer screen 6 at the upper part of the rotary distributor 2; the discharge port D is formed between the inner screen 5 and the outer screen 6 at the lower part of the spiral blade 4.

[0016] like Figure 2 As shown, the rotary distributor 2 includes a distribution baffle 2.1 and a distribution paddle 2.3; four distribution ports 2.2 are evenly distributed on the distribution baffle 2.1; the cross-shaped distribution paddle 2.3 is coaxial with the spiral blade 4 and is installed on the upper part of the distribution baffle 2.1; the reduction motor 7 is connected to the rotating shaft of the spiral blade 4; the distribution paddle 2.3 is coaxially installed and connected with the spiral blade 4; the reduction motor 7 drives the spiral blade 4 and the rotary distributor 2 to rotate along the slewing bearing 3, and the corn stalks are input from the feed port C and enter the spiral blade 4 through the rotary distributor 2; the rotary distributor 2 effectively prevents the corn stalks from piling up and clumping; the corn stalks are evenly distributed on the spiral blade 4, and the drying hot air can pass through the gaps between the corn stalks on the spiral blade 4 more evenly.

[0017] like Figure 1 As shown, uniform pores are arranged on the inner screen 5 and the outer screen 6; the hot air baffle 11 is installed in the inner screen 5, and the hot air baffle 11 divides the cylindrical drying machine frame 1 into an upper drying zone A and a lower drying zone B; the upper end of the inner screen 5 is an air inlet E for the drying zone A; the lower end of the inner screen 5 is an air inlet F for the drying zone B; the air inlets E and F are connected to the air outlet pipeline of the hot air furnace 8 through the air supply pipeline 9; the drying hot air enters the inner screen 5 through the air outlet of the hot air furnace 8, the air supply pipeline 9, the air inlet E, and the air inlet F, and is converted into cross-flow hot air for drying the straw through the uniform pores on the inner screen 5; the uniform pores on the outer screen 6 become the discharge channel for the moisture from the drying of the straw.

[0018] like Figure 1 As shown, the waste heat collecting hood 12 is installed in the second drying zone B at the lower part of the hot air partition 11; the waste heat collecting hood 12 is provided with a waste heat recovery port G, and the waste heat recovery port G on the waste heat collecting hood 12 is connected with the air inlet pipeline of the hot air furnace 8 through the waste heat recovery pipeline 10; the hot air after drying is recycled to the air inlet of the hot air furnace through the waste heat recovery port G and the waste heat recovery pipeline 10.

Claims

1. A tower-shaped compound cross-flow corn straw drying device, characterized in that: It includes a cylindrical drying machine frame, a rotary bearing, spiral blades, an inner screen, an outer screen, a reduction motor, a hot air furnace, and an air supply pipeline; the rotating axis of the spiral blades is installed on the rotary bearing; the inner screen and the outer screen are arranged and installed along the rotating axis of the spiral blades; a feed inlet is formed between the upper inner screen and the outer screen; a discharge port is formed between the lower inner screen and the outer screen; uniform air holes are arranged on the inner screen and the outer screen; the upper and lower ends of the inner screen are air inlets; the air inlet is connected to the hot air furnace outlet pipeline through the air supply pipeline.

2. A tower-shaped compound cross-flow corn straw drying device according to claim 1, characterized in that: It also includes a rotary feeder, which includes a feeding baffle and a feeding paddle; the feeding baffle is evenly distributed with feeding openings; the feeding paddle and the feeding baffle are installed on the upper end of the rotating shaft of the spiral blade; the cross-shaped feeding paddle is installed on the upper part of the feeding baffle; the cross-shaped feeding paddle is coaxially installed and connected with the spiral blade; the reduction motor is driven and connected with the rotating shaft of the spiral blade; the reduction motor drives the spiral blade and the rotary feeder to rotate along the slewing bearing, and the corn stalks are input from the feed port and enter the spiral blade through the rotary feeder.

3. The tower-shaped compound cross-flow corn straw drying device according to claim 1, characterized in that: It also includes a hot air baffle, a waste heat collecting hood, and a waste heat recovery pipeline; the hot air baffle is installed in the inner screen, and the hot air baffle divides the cylindrical drying machine frame into an upper drying zone 1 and a lower drying zone 2; the upper end of the inner screen is the air inlet of the drying zone 1; the lower end of the inner screen is the air inlet of the drying zone 2; the waste heat collecting hood is installed in the drying zone 2 at the bottom of the hot air baffle; the waste heat collecting hood is provided with a waste heat recovery port, and the waste heat recovery port on the waste heat collecting hood is connected to the hot air furnace inlet pipeline through the waste heat recovery pipeline.

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