Coke transfer method and coke transfer system

Abstract

The invention discloses a coke transfer method and a coke transfer system, and relates to the technical field of coke transfer, the coke transfer method comprises the following steps: S1, obtaining a biomass raw material; s2, filling the biomass raw material at the top of the coke layer in the coke tank to form a biomass layer; s3, transferring the coke tank; the reaction activity of the biomass raw material is high, the biomass raw material has a certain amount of volatile components, the coke burning loss can be fully replaced by the high reaction activity of biomass filled at the top of the coke tank, the coke burning loss amount is effectively reduced, the carbon emission during coke burning loss is reduced, and meanwhile, oxycarbide generated by biomass oxidation belongs to green carbon, so that the carbon emission is reduced. In addition, the cost of the biomass raw materials is low, the operation difficulty is low when the biomass raw materials are actually filled and released, the safety problem of production accidents caused by negative pressure generated in a coke tank cavity due to physical sealing cannot occur, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coke transportation, and in particular to a coke transportation method and a coke transportation system. Background Art

[0002] With the continuous development of industrial technology, the industrial technology of the coking industry is gradually developing towards economy, environmental protection and low carbonization. Coke transfer is the transfer process of transferring coke in the coke oven to the dry quenching coke oven. In this process, since the top of the coke drum is open, the high-temperature coke inside the coke drum directly contacts with the external oxygen and reacts to produce carbon burning and carbon emissions. At present, the burning problem caused by coke transfer is about 50-150kg / tank depending on the type of coal and process, which not only causes economic losses, but also causes problems such as air pollution.

[0003] The existing technology mainly uses water or physical sealing to reduce the burning loss of coke during transportation. CN104212465A uses the method of spraying water to lower the temperature of coke to reduce the burning loss of coke, and CN106010593A uses the method of installing a cover on the coke tank to isolate oxygen to reduce the burning loss of coke. However, there are problems such as high cost, high operation difficulty, and explosion hazard.

[0004] Therefore, people are in urgent need of a coke transportation method with low cost, low operating difficulty and high safety on the basis of reducing the coke burning loss. Summary of the invention

[0005] The purpose of the present invention is to provide a coke transfer method and a coke transfer system to solve the problems existing in the above-mentioned prior art. The biomass raw material layer filled above the coke layer is used to replace the coke burnout, thereby effectively reducing the coke burnout amount. The method has low cost, low practical operation difficulty and high safety.

[0006] To achieve the above object, the present invention provides the following scheme: The present invention provides a coke transport method, comprising the following steps:

[0007] S1: Obtain biomass raw materials;

[0008] S2: The biomass raw materials are placed on the top of the coke layer in the coke tank to form a biomass layer;

[0009] S3: Transfer coke tank.

[0010] Preferably, in step S1, the obtained biomass raw material is crushed.

[0011] Preferably, step crushing is adopted during crushing.

[0012] Preferably, in step S1, the crushed biomass raw material is briquette-pressed.

[0013] Preferably, in step S1, a filling bag is filled with blocky biomass raw materials.

[0014] Preferably, in step S2, the biomass raw material is placed on top of the coke layer manually, by forklift transfer or by automated robotic arms.

[0015] Preferably, the biomass raw material is wood, straw, aquatic plants or kitchen waste.

[0016] The present invention also provides a coke transfer system, including a coke drum, a coke transport vehicle, a moving track and a biomass raw material transfer device, wherein the coke drum moves on the moving track through the coke transport vehicle, the biomass raw material transfer device is arranged on one side of the moving track, and the discharge end of the biomass raw material transfer device is arranged corresponding to the moving path of the coke drum.

[0017] Preferably, the coke transfer system further comprises a sensor for detecting that the coke tank has arrived below the discharge end of the biomass raw material transfer device, and the sensor, the biomass raw material transfer device and the driving device of the coke tank are all electrically connected to the control system.

[0018] Preferably, the biomass raw material is filled in a filling bag, and the biomass raw material transfer device includes a rotating base with a rotating function, a swing arm, a rotating motor, a rotating shaft, a transmission chain and a hook, one end of the swing arm is fixedly connected to the rotating end of the rotating base, and the other end is connected to the rotating motor, the rotating shaft is horizontally rotatably arranged below the rotating motor, the rotating motor and the rotating shaft are connected to each other through gears and the transmission chain, a hook is fixedly arranged on the rotating shaft, and the hook is arranged along the radial direction of the rotating shaft, the filling bag is provided with a hanging hole matching the hook, and the horizontal height of the transfer path of the filling bag is higher than the horizontal height of the top opening of the coke tank.

[0019] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0020] Biomass raw materials have high reactivity and a certain amount of volatile matter. Filling them on the top of the coke drum can fully replace the coke loss by utilizing the high reactivity of biomass, effectively reducing the amount of coke loss and carbon emissions during coke burning. At the same time, the carbon oxides produced by biomass oxidation are green carbon and are not included in carbon dioxide emissions. In addition, the cost of biomass raw materials is low, and the operation difficulty is relatively low when actually filling them. Physical sealing will not cause negative pressure in the coke drum cavity to cause production accidents, thereby improving safety.

[0021] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0022] After the biomass raw materials are crushed, the density, particle size uniformity, component stability and burning resistance of the biomass raw materials can be effectively improved. It is easier to fill and is not easily lifted by external airflow.

[0023] After the biomass raw materials are briquette-pressed, the density and burning resistance of the biomass raw materials are further improved, while the moisture content in the biomass raw materials is reduced.

[0024] Filling biomass raw materials into filler bags can improve the convenience of transportation and reduce dust and raw material waste during transportation.

[0025] The coordinated action of the biomass raw material transfer device and the sensor can improve the automation level of the system and reduce the intensity of manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a structural schematic diagram of the coke transport system of the present invention;

[0028] Figure 2 A top view of the coke transfer system of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the biomass raw material transport device of the present invention;

[0030] Figure 4 A radial view of the hook rotation control portion of the present invention;

[0031] Figure 5 This is an axial view of the hook rotation control portion of the present invention;

[0032] Figure 6 It is a control flow chart of the PLC control cabinet of the present invention;

[0033] Among them, 1. Swing arm; 2. Rotating motor; 3. Rotating shaft; 4. Filling bag; 5. Fixed steel rope; 6. Transmission chain; 7. Hook; 8. Coke tank; 9. Coke transport car; 10. Copper brush; 11. Coke intercepting car hood; 12. Brush track; 13. Loading position; 14. Fixed outer shaft; 15. Rotating base; 16. Frame; 17. Front support arm; 18. Reinforcement arm; 19. Horizontal arm; 20. Motion track; 21. Gear. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The purpose of the present invention is to provide a coke transfer method and a coke transfer system to solve the problems existing in the prior art. The biomass raw material layer filled above the coke layer is used to replace the coke burnout, thereby effectively reducing the coke burnout amount. The method has low cost, low practical operation difficulty and high safety.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The present invention provides a coke transport method, comprising the following steps:

[0038] S1: Obtain biomass raw materials from the outside through a transport vehicle;

[0039] S2: Filling the biomass raw material on the top of the coke layer in the coke tank 8 to form a biomass layer, and filling the biomass layer so that the biomass layer covers the coke layer to block the contact channel between the coke layer and the oxygen in the external environment;

[0040] S3: Normal transfer of coke tank 8.

[0041] The principle of this method is: the biomass raw material has a high reaction activity and a certain amount of volatile matter. Filling it on the top of the coke drum 8 can fully replace the coke burnout with the high reaction activity of the biomass. The advantages are: effectively reducing the amount of coke burnout and reducing carbon emissions during coke burnout. At the same time, the carbon oxides produced by biomass oxidation are green carbon and are not included in carbon dioxide emissions. In addition, the cost of biomass raw materials is low, and the operation difficulty is relatively low when actually filling the biomass raw materials. Physical sealing will not cause negative pressure in the coke drum 8 cavity to cause production accidents, thereby improving safety.

[0042] The calculation principle that the reaction activity of biomass raw materials is greater than that of coke, according to the Arrhenius equation, the oxidation reaction rate is:

[0043]

[0044] Where:

[0045] k—Arrhenius rate constant, s -1 ;

[0046] f(a) is the differential form of the reaction mechanism function;

[0047] E—activation energy, kJ / mol;

[0048] A—pre-exponential factor, -s -1 ;

[0049] R—gas constant, 8.314 J / (mol·K);

[0050] T—temperature, K;

[0051] a—conversion rate;

[0052] e is a natural constant in mathematics;

[0053] m represents the instantaneous mass of the reactant, mg;

[0054] m0—initial mass, mg;

[0055] m ∞ —final mass, mg;

[0056] Combining the formula we can get:

[0057]

[0058] Where β is the heating rate, K / min, β = dT / dt.

[0059] Biomass has a higher reactivity than coke due to its microscopic porous structure, so the activation energy E 生 Less than E 焦 In terms of reaction kinetics, the oxidation rate da / dt of biomass is greater than that of coke, and biomass will preferentially react with oxygen in the coke tank 8, absorbing oxygen and protecting the coke from burning.

[0060] Because when biomass raw materials are directly filled, their density is low, there are more air gaps in contact with oxygen, the burning resistance is low, and the airflow can easily carry away the biomass raw materials. Therefore, before filling the biomass raw materials, the obtained biomass raw materials are crushed to obtain biomass fine powder, which can effectively improve the density, particle size uniformity, component stability and burning resistance of the biomass raw materials, make it easier to fill, and not easily lifted by external airflow.

[0061] Preferably, when the biomass raw materials are crushed, stepped crushing is performed. In this embodiment, two-stage crushing is selected, that is, the particle size after the first crushing is larger than the particle size after the second crushing. The aperture of the drying net of the two-stage crusher is 20mm-5mm, which solves the problem of low crushing efficiency caused by the need to continuously return to the crushing bin for repeated crushing during single-stage crushing.

[0062] Since the biomass raw materials themselves may carry moisture, the crushed biomass raw materials are briquette-processed. The briquetting machine used has the function of squeezing out water. The block biomass raw materials after briquetting can further improve the density and burning resistance of the biomass raw materials, while reducing the moisture in the biomass raw materials.

[0063] Preferably, the moisture in the biomass raw material can be further reduced by drying in combination with briquetting.

[0064] Before actual filling, the moisture content of the biomass raw material is controlled to be less than 15%.

[0065] When pressing the block biomass raw materials, a variety of biomass fine powders of different particle sizes can be selected. The specific particle size range is: 25%-30% below 50 mesh, 60%-70% between 50 and 100 mesh, and 5%-10% below 100 mesh. In this embodiment, the following are used: 25% below 50 mesh, 70% between 50 and 100 mesh, and 5% below 100 mesh. The large particle size fine powder is used as aggregate, and the medium particle size and small particle size fine powder are used as filler, so as to improve the density of the block biomass raw materials.

[0066] In the present embodiment, the internal length, width and height of the briquetting machine are 100-200 mm respectively. The height of the internal cavity decreases during pressing. The length, width and height of the block biomass raw material obtained by pressing are 100-150 mm respectively. The calorific value of the block biomass raw material is 3000-4500 kcal. In the comprehensive element composition, C element accounts for 42-52 wt%.

[0067] In this embodiment, the length, width and height of the filling bag 4 are 1-1.5m respectively, that is, the size of the filling bag 4 is larger than the size of the block biomass raw material, so that more block biomass raw materials can be filled in the filling bag 4. After the filling bag 4 is burned, the block biomass raw materials inside can be scattered on the top of the coke, thereby improving the uniformity of covering the coke.

[0068] Whether the biomass raw materials are powdered or blocky, when they are directly transferred to the coke drum 8, dust and partial shedding of the raw materials may occur, resulting in the waste of raw materials. For this reason, before filling into the coke drum 8, the biomass raw materials are filled into the filling bag 4. After the filling bag 4 enters the coke drum 8, the top of the coke burns through the filling bag 4, and the biomass raw materials inside the filling bag 4 are scattered on the top of the coke.

[0069] In the actual process of placing the biomass raw materials, the biomass raw materials can be placed on the top of the coke layer manually, by forklift transfer or by automated robotic arms. Preferably, an automated robotic arm is used to reduce manual labor intensity.

[0070] Biomass raw materials include wood, straw, aquatic plants or kitchen waste.

[0071] Please refer to Figures 1 to 6 As shown, the present invention also provides a coke transfer device that can use the above-mentioned coke transfer method, including a coke tank 8, a coke transport vehicle 9, a moving track 20 and a biomass raw material transfer device. The coke tank 8 is moved on the moving track 20 by the coke transport vehicle 9, and the biomass raw material transfer device is arranged on one side of the moving track 20. The discharge end of the biomass raw material transfer device is arranged corresponding to the moving path of the coke tank 8. The biomass raw material transfer device can be used to transfer the biomass raw material and fill it into the coke oven.

[0072] The biomass raw material transfer device is arranged on the side of the smoke hood 11 of the coke intercepting vehicle close to the dry quenching coke oven.

[0073] In order to improve the degree of automation, the coke transfer system also includes a sensor for detecting that the coke tank 8 has arrived below the discharge end of the biomass raw material transfer device. The sensor, the biomass raw material transfer device and the driving equipment of the coke tank 8 are all electrically connected to the control system. When the sensor detects that the coke tank 8 has arrived below the discharge end of the biomass raw material transfer device, the control system controls the movement of the biomass raw material transfer device and controls the coke tank 8 to stop. After the biomass raw material is filled, the coke tank 8 is controlled to continue to operate.

[0074] In this embodiment, the sensor adopts a contact sensor, such as a contact sensor including a copper brush 10 and a brush track 12. The brush track 12 is fixed at a specified position, and the copper brush 10 is arranged on the coke transport vehicle 9 of the coke tank 8. The brush track 12 is located on the movement path of the copper brush 10. When the copper brush 10 contacts the brush track 12, that is, the coke tank 8 reaches below the discharge end of the biomass raw material transfer device, the copper brush 10 sends an electrical signal A when in contact with the brush track 12, and the control system starts to control the movement of the biomass raw material transfer device and the coke tank 8.

[0075] The biomass raw material is filled in the filling bag 4. The biomass raw material transfer device includes a rotating base 15, a swing arm 1, a rotating motor 2, a rotating shaft 3, a transmission chain 6 and a hook 7. A motor is arranged in the rotating base 15 to enable it to have a rotating function. One end of the swing arm 1 is fixedly connected to the rotating end of the rotating base 15, and the other end is connected to the rotating motor 2. The rotating shaft 3 is horizontally rotatably arranged below the rotating motor 2. The rotating motor 2 and the rotating shaft 3 are connected through a gear 21 and a transmission chain 6, that is, the rotating motor 2 and the rotating shaft 3 are both provided with a gear 21, and the two gears 21 are connected through the transmission chain 6. A hook 7 is fixedly arranged on the rotating shaft 3, and the hook 7 is arranged along the radial direction of the rotating shaft 3. The filling bag 4 is provided with a hanging hole that cooperates with the hook 7. The horizontal height of the transfer path of the filling bag 4 is higher than the horizontal height of the top opening of the coke tank 8. The working steps of the biomass raw material transfer device are: after receiving the control signal of the control system, the rotating motor 2 drives the rotating shaft 3 to rotate, and the hook 7 rotates accordingly. During the rotation of the hook 7, the filling bag 4 is hooked. At this time, the rotating base 15 moves, driving the swing arm 1 to swing, and swinging to the top of the coke tank 8 corresponding to the filling bag 4, and then the rotating motor 2 is controlled to reverse. When the hook 7 reverses, the filling bag 4 slides into the coke tank 8 to complete the filling of the biomass raw material. After the filling is completed, the rotating motor 2 reverses, and the swing arm 1 is reset to prepare for the next filling action.

[0076] A plurality of stuffing bags 4 are placed at the loading position 13 on one side of the rotating base 15. The plurality of stuffing bags 4 can be placed in sequence on a conveyor belt that is driven along the moving direction of the coke tank 8, and transported in cooperation with the biomass raw material transporting device. When the biomass raw material transporting device is reset, the conveyor belt moves a distance at one end to drive the next stuffing bag 4 to move to the hook 7 position to wait for hanging.

[0077] The swing arm 1 includes a frame 16 , a front support arm 17 , a reinforcement arm 18 and a horizontal arm 19 which are connected in sequence. The frame 16 is connected to the rotating base 15 , and the horizontal arm 19 is connected to the rotating motor 2 .

[0078] In this embodiment, the rotating motor 2 adopts a dual output shaft motor, and the two output shafts are transmitted to the two ends of the rotating shaft 3 through gears 21 and transmission chains 6. The rotating shaft 3 is rotatably set on two fixed outer shafts 14. The two fixed outer shafts 14 are connected to the outer casing of the upper rotating motor 2 or the end of the horizontal arm 19 that fixes the rotating motor 2 through fixed steel cables 5, and the hook 7 is set between the two fixed outer shafts 14.

[0079] In this embodiment, the control system is a PLC control cabinet, the entire biomass raw material filling operation is delayed control, the action time is controlled within 2-8s, and the reset action is instant control.

[0080] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0081] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0082] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A coke transport method, characterized in that: The following steps are involved: S1: Obtain biomass raw materials; S2: The biomass raw materials are placed on the top of the coke layer in the coke tank to form a biomass layer; S3: Transfer coke tank.

2. The coke transport method according to claim 1, characterized in that: In step S1, the obtained biomass raw material is crushed.

3. The coke transport method according to claim 2, characterized in that: The crushing is carried out in stages.

4. The coke transport method according to claim 2, characterized in that: In step S1, the crushed biomass raw material is briquette-pressed.

5. The coke transport method according to claim 4, characterized in that: In step S1, a filling bag is filled with block-shaped biomass raw materials.

6. The coke transport method according to claim 1, characterized in that: In step S2, the biomass raw material is placed on the top of the coke layer by manual labor, forklift transfer or automated robotic arms.

7. The coke transport method according to claim 1, characterized in that: The biomass raw materials are wood, straw, aquatic plants or kitchen waste.

8. A coke transfer system, characterized in that: It includes a coke drum, a coke transport vehicle, a moving track and a biomass raw material transfer device. The coke drum moves on the moving track through the coke transport vehicle, the biomass raw material transfer device is arranged on one side of the moving track, and the discharge end of the biomass raw material transfer device is arranged corresponding to the moving path of the coke drum.

9. The coke transport system according to claim 8, characterized in that: The coke transfer system also includes a sensor for detecting that the coke tank has arrived below the discharge end of the biomass raw material transfer device. The sensor, the biomass raw material transfer device and the driving device of the coke tank are all electrically connected to the control system.

10. The coke transport system according to claim 8, characterized in that: The biomass raw material is filled in a filling bag, and the biomass raw material transfer device includes a rotating base with a rotating function, a swing arm, a rotating motor, a rotating shaft, a transmission chain and a hook. One end of the swing arm is fixedly connected to the rotating end of the rotating base, and the other end is connected to the rotating motor. The rotating shaft is horizontally rotatable and arranged below the rotating motor. The rotating motor is connected to the rotating shaft through gears and the transmission chain. A hook is fixedly arranged on the rotating shaft, and the hook is arranged along the radial direction of the rotating shaft. A hanging hole cooperating with the hook is arranged on the filling bag, and the horizontal height of the transfer path of the filling bag is higher than the horizontal height of the top opening of the coke tank.

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