Coke pusher of vertical furnace and working method of coke pusher

Abstract

The invention relates to a coke pusher of a vertical furnace and a working method thereof, the coke pusher of the vertical furnace comprises a reciprocating driving device, a connecting frame and a coke pushing disc, and the reciprocating driving device is connected with the coke pushing disc through the connecting frame; the coke pushing disc is of a frame structure, and an internal channel of the frame structure is communicated with the gas cooling system; a plurality of blades are arranged in the coke pushing disc, and cutting edges are arranged on the two sides, corresponding to the reciprocating coke pushing direction, of the blades respectively. The coke pusher is indirectly cooled by adopting the cooling gas, so that the coke pusher can be prevented from deforming and losing efficacy due to heating and pressing, the failure rate of the coke pusher is reduced, the long-term stable production of the vertical furnace is ensured, and pollutants such as waste gas and waste water are not generated; the cutting edges are additionally arranged in the coke pushing disc, so that the coke pushing resistance is effectively reduced, the jamming phenomenon during coke pushing is avoided, and the maintenance amount of the coke pushing machine is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of low-rank coal dry distillation, and in particular to a coke pusher of a vertical furnace for low-rank coal dry distillation and a working method thereof. Background Art

[0002] Low-rank coal, defined as coal with a low degree of coalification (such as lignite and long-flame coal), is of low quality, widely distributed in my country, and possesses significant reserves (accounting for approximately half of all coal reserves). Low-rank coal dry distillation involves heating low-rank coal in the absence or absence of oxygen to produce semi-coke, coal tar, and coal gas. This technology significantly improves the economic and environmental performance of low-quality coal, aligning with the trend toward efficient utilization of coal resources and low-carbon development.

[0003] A vertical furnace for low-rank coal dry distillation (abbreviated as a vertical furnace) is a common type of low-rank coal dry distillation equipment used to convert low-rank coal into clean semi-coke, coal gas, and tar. It is particularly suitable for the pyrolysis conversion of low-rank coals such as lignite and long-flame coal. It is characterized by its compact structure, continuous production, high thermal efficiency, and effective separation of semi-coke, tar, and coal gas. The vertical furnace typically consists of a vertical cylindrical or rectangular furnace body, divided from top to bottom into multiple functional sections, including a drying section, dry distillation section (pyrolysis section), cooling section, and coal gas extraction system.

[0004] The coke pusher is a low-rank coal discharge device for the vertical furnace, used to discharge pyrolyzed semi-coal from the furnace to the conveyor belt below. Because the semi-coal temperature is high at the pusher's location, the pusher is susceptible to thermal deformation. Furthermore, the thick and high pressure layer of semi-coal above the pusher creates significant pushing resistance, leading to a high failure rate and limited long-term stable operation. The operational reliability of the pusher directly impacts the continuity and stability of vertical furnace production.

[0005] The Chinese utility model patent with the authorization announcement number CN214299981U discloses "a coke pushing machine", which includes a reciprocating drive structure, a connecting rod and a coke pushing disk. The reciprocating drive structure is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the coke pushing disk. The connecting rod and the coke pushing disk are provided with cooling water channels that are interconnected. The connecting rod is provided with a water inlet, and the coke pushing disk is provided with a plurality of water spray holes. The water inlet and the plurality of water spray holes are both connected to the cooling water channels. During the coke pushing process, cooling water is sprayed from the water spray holes on the coke pushing disk to quench the coke, so that the high-temperature coke is quenched during the coke pushing process, thereby reducing the temperature of the coke in the coke pushing state, protecting the coke pushing disk and the coke supporting platform, avoiding deformation and fracture of steel due to high temperature, extending the service life of the coke pushing disk and the coke supporting platform, and reducing the failure rate. However, contact between cooling water and high-temperature coke will lead to violent vaporization, pulverization and generation of combustible gases, resulting in a harsh on-site operating environment, serious dust pollution and increased explosion risk. In addition, the waste gas and wastewater after quenching need to be purified, which increases the process cost of subsequent treatment. Summary of the Invention

[0006] The present invention provides a coke pusher for a vertical furnace and a working method thereof. The coke pusher is indirectly cooled by cooling gas, which can prevent the coke pusher from deformation and failure due to heat and pressure, thereby reducing the failure rate of the coke pusher and ensuring long-term stable production of the vertical furnace. At the same time, no pollutants such as waste gas and waste water are generated. By adding a blade inside the coke pushing disk, the coke pushing resistance is effectively reduced, the phenomenon of jamming during coke pushing is avoided, and the maintenance workload of the coke pusher is reduced.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A vertical furnace coke pushing machine includes a reciprocating drive device, a connecting frame and a coke pushing plate; the reciprocating drive device is connected to the coke pushing plate via the connecting frame; the coke pushing plate is a frame structure, and the internal channel of the frame structure is connected to the gas cooling system; a plurality of blades are arranged inside the coke pushing plate, and the blades are respectively provided with cutting edges on both sides corresponding to the reciprocating coke pushing direction.

[0009] The coke pushing plate is a frame structure consisting of two longitudinal beams and multiple cross beams. The multiple cross beams are arranged in parallel between the two longitudinal beams, and the two ends of the cross beams are respectively connected to the two longitudinal beams; one end of one of the longitudinal beams is provided with a cooling gas inlet, and the other end of the other longitudinal beam is provided with a cooling gas outlet; the gas cooling system includes a cooling gas inlet pipe and a cooling gas outlet pipe, the cooling gas inlet of the longitudinal beam is connected to the cooling gas inlet pipe, and the cooling gas outlet of the longitudinal beam is connected to the cooling gas outlet pipe.

[0010] The gas cooling system uses air as the cooling gas, and the gas cooling system consists of a cooling gas inlet pipe, a cooling gas outlet pipe, a heat exchanger and a blower; a heat exchanger is provided on the cooling gas outlet pipe, and a blower is provided at the other end of the cooling gas inlet pipe.

[0011] The coke pushing plate is a frame structure consisting of two longitudinal beams and multiple cross beams, and the multiple cross beams are arranged in parallel between the two longitudinal beams; the blade is an annular blade, which is arranged between two adjacent cross beams, and the outer side of the annular blade is fixedly connected to the two longitudinal beams and the corresponding two cross beams respectively; the two inner sides of the annular blade parallel to the cross beams are cutting edges.

[0012] The length of the crossbeam is greater than the length of the carbonization chamber of the vertical furnace, and the distance between the blades on both sides of the annular blade is greater than the width of the carbonization chamber of the vertical furnace.

[0013] The connecting frame is an isosceles triangle frame structure, one end of the bottom side is connected to the coke pushing plate, and the other end is connected to the reciprocating driving device.

[0014] A working method of a coke pusher in a vertical furnace comprises the following steps: when dry distilling low-rank coal in a vertical furnace, the coke pusher pushes out the high-temperature coke after pyrolysis and drops it onto a belt conveyor below; while pushing the coke, a gas cooling system is used to pass cooling gas into a coke pushing disk to forcibly cool the coke pushing disk and prevent the coke pushing disk from being deformed by heat; the cooling gas enters from one end of the coke pushing disk and is discharged from the other end diagonally opposite; during the reciprocating coke pushing process, the double-sided blades of multiple blades provided in the coke pushing disk reduce the coke pushing resistance to avoid jamming.

[0015] During the coke pushing process, a blower is used to pressurize air and pass it into the coke pushing disk to cool it down. A heat exchanger is used to recover the waste heat in the high-temperature cooling gas flowing out of the coke pushing disk.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) Using cooling gas to indirectly cool the coke pusher can prevent the coke pusher from deformation and failure due to heat and pressure, reducing the failure rate of the coke pusher and ensuring long-term stable production of the vertical furnace;

[0018] 2) Compared with the water spray cooling method, it does not produce pollutants such as waste gas and waste water, and does not require additional purification equipment for treating waste gas and waste water, resulting in lower equipment investment and operating costs;

[0019] 3) By adding a blade to the coke pushing disc, the coke pushing resistance is effectively reduced, the coke pushing jam is avoided, and the maintenance of the coke pushing machine is reduced;

[0020] 4) The coke pusher has a simple structure, is easy to implement and has low implementation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of a vertical furnace coke pusher according to the present invention.

[0022] Figure 2 It is a top view of the focus pushing disk of the present invention.

[0023] Figure 3 yes Figure 2 AA view in (rotated 90°).

[0024] Figure 4 yes Figure 2 BB view in .

[0025] In the figure: 1. Reciprocating drive device 2. Connecting frame 3. Coke pusher 31. Longitudinal beam 32. Crossbeam 4. Blade 5. Cutting edge DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0027] like Figure 1 、 Figure 2 As shown, the vertical furnace coke pushing machine described in the present invention includes a reciprocating drive device 1, a connecting frame 2 and a coke pushing plate 3; the reciprocating drive device 1 is connected to the coke pushing plate 3 through the connecting frame 2; the coke pushing plate 3 is a frame structure, and the internal channel of the frame structure is connected to the gas cooling system; a plurality of blades 4 are provided inside the coke pushing plate 3, and the blades 4 are respectively provided with cutting edges 5 on both sides corresponding to the reciprocating coke pushing direction.

[0028] The coke pushing plate 3 is a frame structure consisting of two longitudinal beams 31 and multiple cross beams 32. The multiple cross beams 32 are arranged in parallel between the two longitudinal beams 31, and the two ends of the cross beams 32 are respectively connected to the two longitudinal beams 31; one end of one of the longitudinal beams 31 is provided with a cooling gas inlet, and the other end of the other longitudinal beam 31 is provided with a cooling gas outlet; the gas cooling system includes a cooling gas inlet pipe and a cooling gas outlet pipe, the cooling gas inlet of the longitudinal beam 31 is connected to the cooling gas inlet pipe, and the cooling gas outlet of the longitudinal beam 31 is connected to the cooling gas outlet pipe.

[0029] Furthermore, the gas cooling system uses air as cooling gas, and the gas cooling system consists of a cooling gas inlet pipe, a cooling gas outlet pipe, a heat exchanger and a blower; a heat exchanger is provided on the cooling gas outlet pipe, and a blower is provided at the other end of the cooling gas inlet pipe.

[0030] The focus pushing plate 3 is a frame structure consisting of two longitudinal beams 31 and multiple cross beams 32, and the multiple cross beams 32 are arranged in parallel between the two longitudinal beams 31; the blade 4 is an annular blade, which is arranged between two adjacent cross beams 32, and the outer side of the annular blade is fixedly connected to the two longitudinal beams 31 and the corresponding two cross beams 32 respectively; the two inner sides of the annular blade parallel to the cross beams 32 are cutting edges.

[0031] Further, such as Figure 3 、 Figure 4 As shown, the length of the crossbeam 32 is greater than the length L of the carbonization chamber of the vertical furnace, and the distance between the blades 5 on both sides of the annular blade is greater than the width B of the carbonization chamber of the vertical furnace.

[0032] The connecting frame 2 is an isosceles triangle frame structure, one end of the bottom side is connected to the coke pushing plate 3, and the other end is connected to the reciprocating drive device 1.

[0033] The present invention describes a working method of a coke pusher in a vertical furnace. When a vertical furnace is used to perform dry distillation on low-rank coal, the high-temperature coke after pyrolysis is pushed out by the coke pusher and falls onto a belt conveyor below; while pushing the coke, a gas cooling system is used to pass cooling gas into a coke pushing disk 3 to forcibly cool the coke pushing disk 3 to prevent the coke pushing disk 3 from being deformed by heat; the cooling gas enters from one end of the coke pushing disk 3 and is discharged from the other end diagonally opposite; during the reciprocating coke pushing process, the double-sided blades 5 of the multiple blades 4 arranged in the coke pushing disk 3 reduce the coke pushing resistance to avoid jamming.

[0034] Furthermore, during the coke pushing process, a blower is used to pressurize air and pass it into the coke pushing disk 3 to cool the coke pushing disk 3, and a heat exchanger is used to recover waste heat in the high-temperature cooling gas flowing out of the coke pushing disk 3.

[0035] The present invention discloses a vertical furnace coke pusher, comprising a reciprocating drive device 1, a connecting frame 2, and a coke pusher plate 3. The structure of the coke pusher plate 3 is different from that of conventional coke pushers. The coke pusher plate 3 of the present invention has the functions of gas cooling to prevent deformation and reduce coke pushing resistance. The details are as follows:

[0036] The coke pushing disc 3 of the coke pushing machine is a welded steel structure. It is installed under the vertical furnace and needs to withstand the pressure of coke during operation. The temperature of the coke is relatively high. In order to solve the problem that it is easily deformed due to heat and pressure during coke pushing, the present invention adopts the method of introducing cooling gas into the coke pushing disc 3 for indirect forced cooling to reduce the amount of deformation after heating. The present invention preferably adopts the method of forced blasting into the coke pushing disc 3, which is easy to implement and has low implementation cost. In order to extend the cooling distance and enhance the cooling effect, the cooling gas enters from one end of the coke pushing disc 3 and is discharged from the other end diagonally opposite to ensure the overall cooling effect of the coke pushing disc 3. In order to fully utilize energy, the waste heat in the high-temperature cooling gas flowing out of the coke pushing disc 3 can be further recovered by a heat exchanger. The cooling gas inlet pipe connected to the blower and the cooling gas outlet pipe connected to the heat exchanger are both flexible pipes.

[0037] The coke material layer above the coke pushing disk 3 is thick and the pressure is high. In order to solve the problem of high failure rate and long-term stable operation of the coke pushing machine caused by the large coke pushing resistance, the present invention adds multiple blades 4 to the coke pushing disk 3, and uses the double-sided blades 4 arranged along the reciprocating coke pushing direction to reduce the coke pushing resistance, avoid jamming, and ensure long-term stable operation of the coke pushing machine.

[0038] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A vertical furnace coke pusher, comprising a reciprocating drive device, a connecting frame and a coke pushing plate; the reciprocating drive device is connected to the coke pushing plate via the connecting frame; characterized in that: The coke pushing disk is a frame structure, and the internal channel of the frame structure is connected to the gas cooling system; a plurality of blades are arranged inside the coke pushing disk, and the blades are respectively provided with cutting edges on both sides corresponding to the reciprocating coke pushing direction.

2. The vertical furnace coke pusher according to claim 1, characterized in that: The coke pushing plate is a frame structure consisting of two longitudinal beams and multiple cross beams. The multiple cross beams are arranged in parallel between the two longitudinal beams, and the two ends of the cross beams are respectively connected to the two longitudinal beams; one end of one of the longitudinal beams is provided with a cooling gas inlet, and the other end of the other longitudinal beam is provided with a cooling gas outlet; the gas cooling system includes a cooling gas inlet pipe and a cooling gas outlet pipe, the cooling gas inlet of the longitudinal beam is connected to the cooling gas inlet pipe, and the cooling gas outlet of the longitudinal beam is connected to the cooling gas outlet pipe.

3. The vertical furnace coke pusher according to claim 2, characterized in that: The gas cooling system uses air as the cooling gas, and the gas cooling system consists of a cooling gas inlet pipe, a cooling gas outlet pipe, a heat exchanger and a blower; a heat exchanger is provided on the cooling gas outlet pipe, and a blower is provided at the other end of the cooling gas inlet pipe.

4. The vertical furnace coke pusher according to claim 1, characterized in that: The coke pushing plate is a frame structure consisting of two longitudinal beams and multiple cross beams, and the multiple cross beams are arranged in parallel between the two longitudinal beams; the blade is an annular blade, which is arranged between two adjacent cross beams, and the outer side of the annular blade is fixedly connected to the two longitudinal beams and the corresponding two cross beams respectively; the two inner sides of the annular blade parallel to the cross beams are cutting edges.

5. The vertical furnace coke pusher according to claim 4, characterized in that: The length of the crossbeam is greater than the length of the carbonization chamber of the vertical furnace, and the distance between the blades on both sides of the annular blade is greater than the width of the carbonization chamber of the vertical furnace.

6. The vertical furnace coke pusher according to claim 1, characterized in that: The connecting frame is an isosceles triangle frame structure, one end of the bottom side is connected to the coke pushing plate, and the other end is connected to the reciprocating driving device.

7. The method for operating a vertical furnace coke pusher according to any one of claims 1 to 6, characterized in that: When using a vertical furnace to carry out dry distillation of low-rank coal, the high-temperature coke after pyrolysis is pushed out by a coke pusher and falls onto the belt conveyor below; while pushing the coke, a gas cooling system is used to pass cooling gas into the coke pushing disk to force the disk to cool it and prevent it from being deformed by heat; the cooling gas enters from one end of the coke pushing disk and is discharged from the other end diagonally opposite; during the reciprocating coke pushing process, the double-sided blades of multiple blades installed in the coke pushing disk reduce the coke pushing resistance to avoid jamming.

8. The method for operating a vertical furnace coke pusher according to claim 7, characterized in that: During the coke pushing process, a blower is used to pressurize air and pass it into the coke pushing disk to cool it down. A heat exchanger is used to recover the waste heat in the high-temperature cooling gas flowing out of the coke pushing disk.

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