A new type of low-temperature drying device for alternative fuel

Abstract

The application discloses a novel low-temperature drying device for alternative fuel, which comprises drying chambers (1) arranged in pairs, connecting channels (2) arranged between the drying chambers (1) on two sides, airflow distribution plates (4) arranged in the drying chambers (1) for stacking materials, airflow channels (5) arranged at the bottom of the drying chambers (1), and pushing devices (6) arranged in the drying chambers (1) for pushing the materials on the airflow distribution plates (4). When the device starts to operate, the alternative fuel is fed into the drying chambers (1), the alternative fuel falls on the airflow distribution plates (4) to form a material layer, low-temperature waste gas introduced from the airflow channels (5) into the left drying chamber (1) is utilized, and the alternative fuel is tumbled in the drying chambers (1), which has the effects of drying the alternative fuel and uniformly mixing the alternative fuel, reduces the size and component fluctuation of the alternative fuel, realizes the large-scale application of the alternative fuel, and reduces pollution.

Description

Technical Field

[0001] This invention belongs to the field of environmentally friendly fuel processing technology. Specifically, this invention relates to a novel low-temperature drying device for alternative fuels. Background Technology

[0002] Utilizing alternative fuels in cement kilns can effectively reduce the consumption of fossil fuels such as coal, thereby achieving carbon emission reduction in the cement industry. Currently, the alternative fuels used in my country generally suffer from high moisture content, low calorific value, and large fluctuations in size and composition, which affect the operating conditions of cement kilns and clinker production, hindering the large-scale utilization of alternative fuels.

[0003] Currently, the cement industry uses cement kiln heat sources and drying devices to dry alternative fuels, which can reduce the moisture content and increase the calorific value of the alternative fuels. On the one hand, the high temperature of the heat source affects the energy consumption of the cement kiln; on the other hand, the drying devices have not yet solved the problem of fluctuations in the size and composition of alternative fuels, which still affects the planned utilization of alternative fuels. Summary of the Invention

[0004] The present invention aims to provide a novel low-temperature drying device for alternative fuels that utilizes low-temperature exhaust gas from cement kilns to dry alternative fuels, while simultaneously using fluidization to ensure uniform mixing of the alternative fuels, reduce size and composition fluctuations, and enable large-scale application of alternative fuels.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a novel alternative fuel low-temperature drying device, comprising a pair of drying chambers, a connecting channel for supplying gas movement between the tops of the drying chambers, a discharge pipe for pouring alternative fuel between the drying chambers, an airflow distribution plate for storing alternative fuel inside the drying chamber, an airflow channel for inlet and outlet of gas at the bottom of the drying chamber, a pushing device for pushing material on the airflow distribution plate inside the drying chamber, and a sealing device between the discharge pipe and the drying chamber;

[0006] The drying chamber contains fuel for drying, and the fuel is piled up in a material layer on the airflow distribution plate. The airflow channel at the bottom of the left drying chamber introduces waste gas at about 100°C from the cement kiln head. The waste gas flows from the airflow distribution plate through the left drying chamber, the connecting channel, and the right drying chamber, and is discharged from the airflow distribution plate in the right drying chamber. After drying, the waste gas enters from the right drying chamber, and the airflow passes through the dried alternative fuel and the air distribution plate in the left drying chamber before being discharged.

[0007] The pushing device includes a pushing plate disposed above the airflow distribution plate, a traveling trolley disposed on one side of the pushing plate, an electric chain connected to the traveling trolley disposed in the drying chamber, the bottom end of the pushing plate being in contact with the upper surface of the airflow distribution plate, a rotating shaft disposed on the pushing plate being connected to the traveling trolley, a rotary motor disposed on the traveling trolley being connected to the rotating shaft, and an electric telescopic rod disposed between the pushing plate and the traveling trolley.

[0008] The airflow distribution plate is provided with air holes, the top of which is conical and the diameter of the top of the air hole is smaller than the diameter of the bottom.

[0009] The pores are evenly distributed.

[0010] The drying chamber is equipped with a travel track that works in conjunction with the traveling trolley.

[0011] The sealing device includes a sealing plate, which is disposed at the connection between the discharge pipe and the drying chamber. The outer edge of the sealing plate is provided with a sealing strip, and a support rod is provided on the sealing plate. An electric roller that cooperates with the support rod is provided in the drying chamber.

[0012] The drying chamber is provided with a feed inlet at the top, and a sealing cover is provided at the feed inlet.

[0013] The airflow channel is connected to the air pumping equipment.

[0014] A method for low-temperature drying of alternative fuels, implemented using a novel low-temperature drying device, comprises the following steps:

[0015] S1: When the equipment starts running, feed alternative fuel with a size of less than 70mm into the drying chamber, where it will accumulate on the airflow distribution plates on the left and right sides of the drying chamber and form a 10-30cm material layer for drying.

[0016] S2: Introduce waste gas at about 100°C from the kiln head of the cement kiln to the airflow channel at the bottom of the left drying chamber. The waste gas enters the left drying chamber through the airflow distribution plate. Control the airflow to make the alternative fuel turbulent in the drying chamber. On the one hand, dry the alternative fuel, and on the other hand, mix the alternative fuel evenly to complete the drying of the alternative fuel in the left drying chamber.

[0017] S3: The airflow passes through the connecting channel between the drying chambers, enters the right drying chamber from the left drying chamber, and exits through the material layer and airflow distribution plate in the right drying chamber. At this time, the alternative fuel in the right drying chamber is in the pre-drying stage, and the airflow can remove the dust generated during the drying process by passing through the alternative fuel material layer and airflow distribution plate. The dust is retained in the alternative fuel material layer, and the dust concentration in the exhaust gas can be controlled within 8mg / Nm3.

[0018] S4: After 10-30 minutes of adjustment based on factors such as the type of alternative fuel, water content, and material layer thickness, the airflow direction is switched, and the exhaust gas enters from the right drying chamber to fluidize and dry the alternative fuel in the right drying chamber. The airflow passes through the left drying chamber 1 and is then discharged along with the alternative fuel and the air distribution plate.

[0019] S5: After drying is completed, use the pusher to remove the dried alternative fuel from the bottom of the left drying chamber. When the pusher returns, the pusher plate is at an angle of 10 to 45 degrees to the horizontal to prevent residual alternative fuel from accumulating behind the pusher plate 61 and forming a dead corner.

[0020] S6: After the pusher returns, the alternative fuel to be dried can be fed into the feed port of the left drying chamber to form a 10-30cm material layer for drying.

[0021] The technical effect of the present invention is as follows: when the equipment starts running, the alternative fuel is fed into the drying chamber, and the alternative fuel falls onto the airflow distribution plate to form a material layer. The low-temperature exhaust gas introduced from the airflow channel into the left drying chamber is used to make the alternative fuel turbulent in the drying chamber, which on the one hand achieves the effect of drying the alternative fuel, and on the other hand makes the alternative fuel evenly mixed.

[0022] At the same time, the airflow enters the right drying chamber from the left drying chamber through the connecting cavity of the drying chamber, passes through the material layer of the right drying chamber and the airflow distribution plate and is discharged. At this time, the alternative fuel in the right drying chamber is in the pre-drying stage, and the airflow can remove the dust generated in the drying process by passing through the alternative fuel material layer and the airflow distribution plate. When the alternative fuel in the left drying chamber is discharged, a certain degree of dust pollution can be reduced.

[0023] After switching the airflow direction, the exhaust gas enters from the right drying chamber to fluidize and dry the alternative fuel in the right drying chamber. At the same time, the dust remaining in the right drying chamber is also blown into the left drying chamber. The dust remaining in the drying chamber is then uniformly treated after the drying process is completely completed, reducing environmental pollution. Attached Figure Description

[0024] This manual includes the following figures, which illustrate the following:

[0025] Figure 1 This is a schematic diagram of the structure of a novel low-temperature drying device for alternative fuels according to the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the airflow distribution plate of a novel alternative fuel cryogenic drying device.

[0027] Figure 3 for Figure 1 A schematic diagram of the pore structure of a novel alternative fuel cryogenic drying device.

[0028] Figure 4 for Figure 1 Figure A is an enlarged schematic diagram of a novel low-temperature drying device for alternative fuels.

[0029] Figure 5 for Figure 1 A schematic diagram of the sealing device of a novel alternative fuel low-temperature drying device.

[0030] The following are marked in the diagram: 1. Drying chamber; 2. Connecting channel; 3. Discharge pipe; 4. Airflow distribution plate; 41. Air hole; 5. Airflow channel; 6. Pushing device; 61. Pushing plate; 62. Traveling trolley; 63. Electric chain; 64. Traveling track; 65. Rotating shaft; 66. Rotary motor; 67. Electric telescopic rod; 7. Sealing device; 71. Sealing plate; 72. Sealing strip; 73. Support rod; 74. Electric roller; 8. Feed port; 9. Sealing cover. Detailed Implementation

[0031] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0032] Please see Figure 1-5 A novel low-temperature drying device for alternative fuels is characterized by comprising: a pair of drying chambers 1, a connecting channel 2 for supplying gas movement between the tops of the drying chambers 1, a discharge pipe 3 for pouring alternative fuel between the bottoms of the drying chambers 1, an airflow distribution plate 4 for storing alternative fuel inside the drying chambers 1, an airflow channel 5 for inlet and outlet of gas at the bottom of the drying chambers 1, a pushing device 6 for pushing material on the airflow distribution plate 4 inside the drying chambers 1, and a sealing device 7 between the discharge pipe 3 and the drying chambers 1;

[0033] The drying chamber 1 contains fuel for drying, and the fuel is piled up in a material layer on the airflow distribution plate 4. The airflow channel 5 at the bottom of the left drying chamber 1 introduces waste gas of about 100°C from the kiln head of the cement kiln. The flow direction of the waste gas is from the airflow distribution plate 4 through the left drying chamber 1, the connecting channel 2, and the right drying chamber 1, and it is discharged from the airflow distribution plate 4 in the right drying chamber 1. After drying, the waste gas enters from the right drying chamber 1 to fluidize and dry the substitute fuel in the right drying chamber 1. After the airflow passes through the left drying chamber 1, the substitute fuel and the air distribution plate are discharged.

[0034] When the equipment starts running, alternative fuel with a size smaller than 70mm is fed into drying chamber 1, forming a 10-30cm material layer in the left and right drying chambers 1. Exhaust gas at approximately 100℃ is introduced from the cement kiln head into the airflow channel 5 of the left drying chamber 1. The exhaust gas enters the left drying chamber 1 through the airflow distribution plate 4. The airflow is controlled to cause turbulence in the alternative fuel within the drying chamber 1, drying the alternative fuel on one hand and ensuring uniform mixing on the other. The airflow passes through the connecting cavity of drying chamber 1 from the left drying chamber 1 into the right drying chamber 1, passing through the material layer in the right drying chamber 1 and exiting through the airflow distribution plate 4. At this point, the alternative fuel in the right drying chamber 1 is in the pre-drying stage, and the airflow passes through the alternative fuel material layer and the airflow distribution plate 4. The flow distribution plate 4 can remove dust generated during the drying process, and the dust concentration in the exhaust gas can be controlled within 8 mg / Nm3. After 10-30 minutes of adjustment based on factors such as the type of alternative fuel, moisture content, and material layer thickness, the airflow direction is switched, and the exhaust gas enters from the right drying chamber 1 to fluidize and dry the alternative fuel in the right drying chamber 1. The airflow then passes through the left drying chamber 1 and discharges the dried alternative fuel and the air distribution plate. At this time, the pushing device 6 is used to remove the dried alternative fuel from the bottom layer of the left drying chamber 1. When the pushing device 6 returns, the pushing plate 61 forms an angle of 10-45° with the horizontal to prevent residual alternative fuel from accumulating behind the pushing plate 61 and forming a dead corner. After the pushing device 6 returns, the alternative fuel to be dried can be fed into the feeding port of the left drying chamber 1 to form a material layer of 10-30 cm for drying.

[0035] The airflow distribution plate 4 is provided with air holes 41. The top of the air holes 41 is conical and the top diameter of the air holes 41 is smaller than the bottom diameter. This allows the airflow to pass through the airflow distribution plate 4 and also prevents the alternative fuel from falling through the airflow distribution plate 4. At the same time, it can increase the airflow speed when the airflow passes through the airflow distribution plate 4 from bottom to top, thereby achieving a better effect of drying and blowing away dust.

[0036] The pores 41 are evenly distributed, which increases the efficiency of airflow and improves the uniformity of the drying state of the alternative fuel on the airflow distribution plate 4, reducing the occurrence of uneven drying state.

[0037] The feeding device 6 includes a feeding plate 61 disposed above the airflow distribution plate 4, a traveling trolley 62 disposed on one side of the feeding plate 61, an electric chain 63 connected to the traveling trolley 62 disposed in the drying chamber 1, and the bottom end of the feeding plate 61 and the upper surface of the airflow distribution plate 4 are in contact.

[0038] The electric chain 63 drives the traveling trolley 62 to move, which in turn drives the pusher plate 61 to move. The pusher plate 61 pushes the material remaining on the airflow distribution plate 4 out of the discharge pipe 3.

[0039] The drying chamber 1 is equipped with a travel track 64 that works in conjunction with the traveling trolley 62; the presence of the travel track 64 makes the movement of the traveling trolley 62 more stable.

[0040] The pusher plate 61 is provided with a rotating shaft 65 connected to the traveling trolley 62, and the traveling trolley 62 is provided with a rotary motor 66 connected to the rotating shaft 65. The rotary motor 66 drives the pusher plate 61 to rotate, so that when the traveling trolley 62 drives the pusher plate 61 to reset, it can avoid squeezing and pushing the material that has been put back into the airflow distribution plate 4 to one side, which would affect the efficiency of subsequent drying.

[0041] An electric telescopic rod 67 is provided between the pusher plate 61 and the traveling trolley 62; the presence of the electric telescopic rod 67 can make the position of the pusher plate 61 more stable and serve to assist in rotating the pusher plate 61.

[0042] The sealing device 7 includes a sealing plate 71, which is located at the connection between the discharge pipe 3 and the drying chamber 1. The outer edge of the sealing plate 71 is provided with a sealing strip 72, and a support rod 73 is provided on the sealing plate 71. An electric roller 74 that cooperates with the support rod 73 is provided inside the drying chamber 1.

[0043] By sealing the connection between the drying chamber 1 and the discharge pipe 3 with the sealing plate 71, it can be prevented that the exhaust gas will carry dust out from the discharge pipe 3 when the exhaust gas is circulated, thus avoiding pollution.

[0044] The top of the drying chamber 1 is provided with a feed inlet 8, and a sealing cover 9 is provided at the feed inlet 8; the feed is fed through the feed inlet 8, and the sealing cover 9 is closed after the feeding is completed to prevent exhaust gas from leaking from the sealing cover 9.

[0045] Airflow channel 5 is connected to a pumping device; the pumping device is used to introduce waste gas into the drying chamber 1.

[0046] A method for low-temperature drying of alternative fuels, implemented using a novel low-temperature drying device, comprises the following steps:

[0047] S1: When the equipment starts running, feed alternative fuel with a size of less than 70mm into the drying chamber 1. It will accumulate on the airflow distribution plates 4 in the left and right drying chambers 1 and form a material layer of 10~30cm for drying.

[0048] S2: Introduce waste gas at about 100°C from the kiln head of the cement kiln to the airflow channel 5 at the bottom of the left drying chamber 1. The waste gas enters the left drying chamber 1 through the airflow distribution plate 4. Control the airflow to make the alternative fuel turbulent in the drying chamber 1. On the one hand, dry the alternative fuel, and on the other hand, mix the alternative fuel evenly to complete the drying of the alternative fuel in the left drying chamber 1.

[0049] S3: The airflow passes through the connecting channel 2 between the drying chambers 1, enters the right drying chamber 1 from the left drying chamber 1, and exits through the material layer of the right drying chamber 1 and the airflow distribution plate 4. At this time, the alternative fuel in the right drying chamber 1 is in the pre-drying stage, and the airflow can remove the dust generated during the drying process by passing through the alternative fuel material layer and the airflow distribution plate 4. The dust is retained in the alternative fuel material layer, and the dust concentration in the exhaust gas can be controlled within 8 mg / Nm3.

[0050] S4: After the drying process is adjusted for 10-30 minutes according to factors such as the type of alternative fuel, water content, and material layer thickness, the airflow direction is switched, and the exhaust gas enters from the right drying chamber 1 to fluidize and dry the alternative fuel in the right drying chamber 1. The airflow passes through the left drying chamber 1 and the alternative fuel and air distribution plate are discharged.

[0051] S5: After drying is completed, use the pusher device 6 to remove the dried alternative fuel from the bottom layer of the left drying chamber 1. When the pusher device 6 returns, the pusher plate 61 is at an angle of 10~45° to the horizontal to prevent residual alternative fuel from accumulating behind the pusher plate 61 and forming a dead corner.

[0052] S6: After the pusher device 6 returns, the alternative fuel to be dried can be fed into the feed port of the left drying chamber 1 to form a material layer of 10~30cm for drying.

[0053] The technical effect of the present invention is as follows: When the equipment starts running, the alternative fuel is fed into the drying chamber 1, and the alternative fuel falls on the airflow distribution plate 4 to form a material layer. The low temperature exhaust gas introduced from the airflow channel 5 into the left drying chamber 1 is used to make the alternative fuel turbulent in the drying chamber 1, which on the one hand achieves the effect of drying the alternative fuel, and on the other hand makes the alternative fuel evenly mixed.

[0054] At the same time, the airflow enters the right drying chamber 1 from the left drying chamber 1 through the connecting cavity of the drying chamber 1, and is discharged after passing through the material layer of the right drying chamber 1 and the airflow distribution plate 4. At this time, the alternative fuel in the right drying chamber 1 is in the pre-drying stage, and the airflow can remove the dust generated during the drying process by passing through the alternative fuel material layer and the airflow distribution plate 4. When the alternative fuel in the left drying chamber 1 is discharged, a certain degree of dust pollution can be reduced.

[0055] After switching the airflow direction, the exhaust gas enters from the right drying chamber 1 to fluidize and dry the alternative fuel in the right drying chamber 1. At the same time, the dust remaining in the right drying chamber 1 will also be blown into the left drying chamber 1. The dust remaining in the drying chamber 1 will be uniformly treated after the drying process is completely completed, reducing environmental pollution.

[0056] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A novel low-temperature drying device for alternative fuels, characterized in that: The device includes a pair of drying chambers (1), a connecting channel (2) for supplying gas movement between the tops of the drying chambers (1), a discharge pipe (3) for pouring alternative fuel between the drying chambers (1), an airflow distribution plate (4) for storing alternative fuel inside the drying chambers (1), an airflow channel (5) for gas inlet and outlet at the bottom of the drying chambers (1), a pushing device (6) for pushing material on the airflow distribution plate (4) inside the drying chambers (1), and a sealing device (7) between the discharge pipe (3) and the drying chambers (1). The drying chamber (1) contains fuel for drying and the fuel is piled up in a material layer on the airflow distribution plate (4); the airflow channel (5) at the bottom of the left drying chamber (1) introduces waste gas of about 100°C from the kiln head of the cement kiln, and the flow direction of the waste gas is from the airflow distribution plate (4) through the left drying chamber (1), the connecting channel (2), and the right drying chamber (1), and is discharged from the airflow distribution plate (4) in the right drying chamber (1). After drying, the waste gas enters from the right drying chamber (1), and the airflow is discharged through the alternative fuel and the air distribution plate after drying in the left drying chamber (1). The feeding device (6) includes a feeding plate (61) disposed above the airflow distribution plate (4), a traveling trolley (62) disposed on one side of the feeding plate (61), an electric chain (63) connected to the traveling trolley (62) disposed in the drying chamber (1), the bottom end of the feeding plate (61) and the upper surface of the airflow distribution plate (4) are in contact, a rotating shaft (65) connected to the traveling trolley (62) is disposed on the feeding plate (61), a rotary motor (66) connected to the rotating shaft (65) is disposed on the traveling trolley (62), and an electric telescopic rod (67) is disposed between the feeding plate (61) and the traveling trolley (62).

2. The novel alternative fuel low-temperature drying device according to claim 1, characterized in that: The airflow distribution plate (4) is provided with air holes (41), the top of the air holes (41) is conical, and the top diameter of the air holes (41) is smaller than the bottom diameter.

3. The novel alternative fuel low-temperature drying device according to claim 2, characterized in that: The pores (41) are evenly distributed.

4. The novel alternative fuel low-temperature drying device according to claim 1, characterized in that: The drying chamber (1) is equipped with a travel track (64) that works in conjunction with the traveling trolley (62).

5. The novel alternative fuel low-temperature drying device according to claim 1, characterized in that: The sealing device (7) includes a sealing plate (71), which is located at the connection between the discharge pipe (3) and the drying chamber (1). The outer edge of the sealing plate (71) is provided with a sealing strip (72), and a support rod (73) is provided on the sealing plate (71). An electric roller (74) that cooperates with the support rod (73) is provided in the drying chamber (1).

6. The novel alternative fuel low-temperature drying device according to claim 1, characterized in that: The drying chamber (1) is provided with a feed inlet (8) at the top, and a sealing cover (9) is provided at the feed inlet (8).

7. A novel alternative fuel low-temperature drying device according to claim 1, characterized in that: The airflow channel (5) is connected to the air pumping equipment.

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