Electric heating coke oven

Abstract

The embodiment of the utility model provides an electric heating coke oven, which comprises an oven top, a heating carbonization zone, a coke discharge zone and a coke oven base, the heating carbonization zone comprises a plurality of carbonization chambers and a plurality of heating chambers, the carbonization chambers are used for placing low-rank coal or blended coal, an electric heater is arranged in each heating chamber, the heating temperature of the electric heater is adjustable, and the coke discharge zone is arranged on the coke oven base. The furnace top comprises a plurality of coal gas leading-out ports and a plurality of coal charging holes, each carbonization chamber is communicated with the corresponding coal charging holes, and the coal gas leading-out ports are communicated with the carbonization chambers in a one-to-one correspondence mode; the coke discharging area comprises a coke discharging channel and a coke discharging connector capable of being opened and closed, an inlet of the coke discharging channel is communicated with the carbonization chamber, and the coke discharging connector is arranged at an outlet of the coke discharging channel and used for discharging at least one of chemical coke, semicoke and formed coke generated by heating low-rank coal in the carbonization chamber. On one hand, waste gases such as CO2, SO2, NOx and the like are not additionally generated. And on the other hand, the device can adapt to different coke products (metallurgical coke, chemical coke, semicoke and formed coke), and the production benefit of the electric heating coke oven can be conveniently improved.

Description

Electric heating coke oven Technical Field

[0001] This utility model relates to the field of coking technology, and in particular to an electrically heated coke oven. Background Technology

[0002] Currently, conventional mechanized coke ovens are divided into top-loading coke ovens and tamping coke ovens, which mainly use coke oven gas or blast furnace gas as fuel for coking.

[0003] The exhaust gases produced after these fuels are burned contain greenhouse gases such as carbon dioxide (CO2) and air pollutants such as nitrogen oxides (NOx). x Air pollutants include nitrogen oxides (NOx), sulfur dioxide (SO2), and particulate matter. To meet national and local emission standards, integrated steel mills and independent coking plants must be equipped with flue gas desulfurization and denitrification devices to control nitrogen oxides (NOx). x The emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) are also affected. The desulfurization and denitrification processes for flue gas increase production investment and operating costs, reducing the production efficiency of conventional mechanized coke ovens.

[0004] Furthermore, conventional mechanized coke ovens use coking coal as raw material to produce metallurgical coke. Currently, domestic coking coal resources are in short supply and prices are high; while metallurgical coke production capacity is excessive, resulting in lower coke prices. At the same time, rising operating costs are making it difficult for coking production enterprises to survive. Summary of the Invention

[0005] The purpose of this utility model embodiment is to provide an electrically heated coke oven that is adaptable to different coke products and improves the production efficiency of the electrically heated coke oven. The specific technical solution is as follows:

[0006] This application provides an embodiment of an electrically heated coke oven, comprising:

[0007] The coke oven comprises a furnace top, a heating and carbonization zone, a coke discharge zone, and a coke oven base, wherein the furnace top, the heating and carbonization zone, the coke discharge zone, and the coke oven base are arranged sequentially along the height direction of the electrically heated coke oven.

[0008] The heating and carbonization zone includes multiple carbonization chambers and multiple heating chambers. Along a first direction, the carbonization chambers and heating chambers are arranged alternately. The first direction is perpendicular to the height direction. The carbonization chambers are used to hold low-rank coal or blended coal. Each heating chamber is equipped with an electric heater. The temperature of the electric heater is adjustable to ensure that the low-rank coal in the carbonization chamber can be heated to produce at least one of chemical coke, semi-coke, and shaped coke, and that the blended coal in the carbonization chamber can be heated to produce metallurgical coke. Along a second direction, the carbonization chambers sequentially include a coke side and a machine side. The machine side of the carbonization chamber is provided with a machine-side furnace door for loading low-rank coal or blended coal, and the coke side of the carbonization chamber is provided with a coke-side furnace door for discharging the metallurgical coke.

[0009] The furnace top includes multiple gas outlets and multiple coal charging holes. Each carbonization chamber is connected to its corresponding multiple coal charging holes, and the multiple gas outlets and multiple carbonization chambers are connected one-to-one.

[0010] The coke discharge area includes a coke discharge channel and a switchable coke discharge interface. The inlet of the coke discharge channel is connected to the carbonization chamber, and the coke discharge interface is located at the outlet of the coke discharge channel for discharging at least one of the chemical coke, the semi-coke, and the shaped coke produced by heating the low-rank coal in the carbonization chamber.

[0011] In some embodiments, there are multiple coke discharge channels, which are spaced apart at the bottom of the heating and carbonization zone along the second direction, and the inlets of the multiple coke discharge channels are connected to the multiple carbonization chambers one by one.

[0012] In some embodiments, each carbonization chamber is provided with one coke discharge port; the coke discharge port is located on the machine side or coke side of the carbonization chamber, and the outlets of multiple coke discharge channels are connected to the coke discharge port; or,

[0013] Each carbonization chamber is provided with two coke discharge ports, namely a first coke discharge port and a second coke discharge port; the first coke discharge port is located on the machine side of the carbonization chamber, and the second coke discharge port is located on the coke side of the carbonization chamber; the outlet of a portion of the coke discharge channel near the machine side is connected to the first coke discharge port; the outlet of a portion of the coke discharge channel near the coke side is connected to the second coke discharge port.

[0014] In some embodiments, the outlet side of the coke discharge channel is inclined downwards, and the inclination angle in the horizontal direction is greater than 50°.

[0015] In some embodiments, a conveying device is provided in the coke discharge channel.

[0016] In some embodiments, each heating chamber includes at least one first heating channel, and an electric heater is disposed in each first heating channel;

[0017] When each heating chamber includes at least two of the first heating channels, the at least two first heating channels are arranged sequentially along the first direction, and the at least two first heating channels are arranged sequentially along the second direction, such that a first partition wall is provided between two adjacent first heating channels along the first direction.

[0018] In some embodiments, each first heating channel is arranged along the height direction;

[0019] The furnace top is equipped with multiple temperature regulators, and each of the multiple temperature regulators and multiple electric heaters is electrically connected to the other one by one.

[0020] In some embodiments, the furnace top is provided with a plurality of first electric heater replacement ports, and the plurality of first electric heater replacement ports are connected one-to-one with a plurality of first heating channels. The first electric heater replacement ports are used to replace the electric heaters in the first heating channels.

[0021] In some embodiments, each heating chamber includes a second heating channel and a third heating channel, and an electric heater is provided in both the second heating channel and the third heating channel;

[0022] Along the second direction, the second heating channel and the third heating channel are arranged sequentially, and a second partition wall is provided between the second heating channel and the third heating channel.

[0023] In some embodiments, on the coke side near the carbonization chamber, the second heating channel is provided with a second electric heater replacement port, which is used to replace the electric heater in the second heating channel.

[0024] On the machine side near the carbonization chamber, the third heating channel is provided with a third electric heater replacement port, which is used to replace the electric heater in the third heating channel.

[0025] In some embodiments, it also includes:

[0026] The furnace bottom area is located between the coke discharge area and the coke oven base;

[0027] The furnace bottom area is provided with an inspection hole, which leads to the coke discharge area.

[0028] In some embodiments, it also includes:

[0029] The temperature control system includes a temperature controller and multiple temperature sensors, which are installed one-to-one in multiple carbonization chambers to sense the temperature of each carbonization chamber.

[0030] The temperature controller is electrically connected to each electric heater and each temperature sensor, and adjusts the heating power of the electric heaters in adjacent heating chambers according to the temperature of each carbonization chamber, so that the temperature of each carbonization chamber is within the set temperature range; wherein,

[0031] In the low-temperature coking mode, the temperature controller controls the set temperature of each carbonization chamber between 400°C and 600°C;

[0032] In the medium-temperature coking mode, the temperature controller controls the set temperature of each carbonization chamber to be between 600°C and 800°C.

[0033] In high-temperature coking mode, the temperature controller controls the set temperature of each carbonization chamber between 800°C and 1000°C.

[0034] In some embodiments, the heated carbonization zone includes: a first end wall and a second end wall;

[0035] Multiple carbonization chambers and multiple heating chambers are disposed between the first end wall and the second end wall.

[0036] In some embodiments, the coke discharge channel 31 is a sealed channel.

[0037] The beneficial effects of this utility model embodiment are as follows:

[0038] The electrically heated coke oven provided in this embodiment of the invention includes: a furnace top, a heating and carbonization zone, a coke discharge zone, and a coke oven base. The furnace top, heating and carbonization zone, coke discharge zone, and coke oven base are arranged sequentially along the height direction of the electrically heated coke oven. The heating and carbonization zone includes multiple carbonization chambers and multiple heating chambers, arranged alternately along a first direction perpendicular to the height direction. The carbonization chambers are used to hold low-rank coal or blended coal. Each heating chamber is equipped with an electric heater, the temperature of which is adjustable to ensure that the low-rank coal in the carbonization chamber can be heated to produce at least one of chemical coke, semi-coke, and shaped coke, and that the blended coal in the carbonization chamber can be heated to produce metallurgical coke. Metallurgical coke; along the second direction, the carbonization chamber sequentially includes a coke side and a machine side. The machine side of the carbonization chamber is equipped with a machine-side furnace door for loading low-rank coal or blended coal, and the coke side of the carbonization chamber is equipped with a coke-side furnace door for discharging metallurgical coke. The furnace top includes multiple gas outlets and multiple coal charging holes. Each carbonization chamber is connected to its corresponding multiple coal charging holes, and the multiple gas outlets and multiple carbonization chambers are connected one-to-one. The coke discharge area includes a coke discharge channel and a switchable coke discharge interface. The inlet of the coke discharge channel is connected to the carbonization chamber, and the coke discharge interface is located at the outlet of the coke discharge channel for discharging at least one of chemical coke, semi-coke, and shaped coke produced by heating low-rank coal in the carbonization chamber.

[0039] In the steps of producing chemical coke, semi-coke, and shaped coke, low-rank coal or blended coal can be loaded into the carbonization chamber through the machine-side furnace door. The electric heater is adjusted to heat the carbonization chamber to the required temperature for the coke products (chemical coke, semi-coke, or shaped coke). Because chemical coke, semi-coke, and shaped coke have poor caking properties and are difficult to form large coke cakes, they cannot be discharged using conventional methods. After the low-rank coal forms coke products, the chemical coke, semi-coke, and shaped coke can be discharged from the coke discharge area at the bottom of the carbonization chamber. In the step of producing metallurgical coke, blended coal can be fed into the carbonization chamber through the machine-side furnace door. The electric heater is adjusted to heat the carbonization chamber to the required temperature for the metallurgical coke products. Because the blended coal has good coking properties, it can form large coke cakes, and the metallurgical coke can be discharged through the coke-side furnace door. The electrically heated coke oven of this application embodiment, on the one hand, uses electric heating instead of gas heating for coking, eliminating the combustion process and preventing the additional generation of CO2, SO2, and NO. x The elimination of waste gas is more beneficial to environmental protection and energy conservation. On the other hand, it can adapt to the heating and process requirements of different coke products (metallurgical coke, chemical coke, semi-coke and shaped coke), and can produce high-profit coke products according to the market, which facilitates the improvement of the production efficiency of electric heating coke ovens.

[0040] Of course, implementing any product or method of this utility model does not necessarily require achieving all of the above advantages at the same time. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0042] Figure 1 is a front view schematic diagram of the internal structure of an electrically heated coke oven provided in an embodiment of this application;

[0043] Figure 2 is a side view of the internal structure of the electrically heated coke oven shown in Figure 1;

[0044] Figure 3 is a schematic diagram of the electrical connection structure of the electrically heated coke oven shown in Figure 1;

[0045] Figure 4 is a top view of the structure of one heating chamber of the electrically heated coke oven shown in Figure 1;

[0046] Figure 5 is a side view of the internal structure of another heating chamber of an electrically heated coke oven provided in an embodiment of this application.

[0047] The attached figures are labeled as follows:

[0048] 10. Oven top, 11. Gas outlet, 12. Coal charging hole, 13. Temperature regulator, 20. Heating and carbonization zone, 21. Carbonization chamber, 211. Machine side furnace door, 212. Coke side furnace door, 22. Heating chamber, 22A. First partition wall, 22B. Second partition wall, 221. Electric heater, 222. First heating channel, 223. Second heating channel, 224. Third heating channel, 23. First end wall, 24. Second end wall, 25. Partition wall, 30. Coke discharge zone, 31. Coke discharge channel, 32. Coke oven base, 40. Oven bottom zone, 50. Inspection hole, 51. Temperature control system, 60. Temperature controller, 61. Temperature sensor, 62.

[0049] Focal side A, machine side B, first direction X, second direction Y, altitude direction Z. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.

[0051] In the traditional operation of mechanized coke ovens, on the one hand, the flue gas generated from fuel combustion needs to undergo desulfurization and denitrification treatment to meet emission standards, leading to a significant increase in investment and operating costs for pollutant treatment equipment. On the other hand, unlike blended coal, low-rank coal has poor coking properties, making it difficult to form large lumps of chemical coke, semi-coke, and shaped coke. Chemical coke, semi-coke, and shaped coke are mostly in dispersed lumps, which are difficult to push out of the coke side furnace door. Therefore, the traditional separate design of the machine side furnace door and coke side furnace door in mechanized coke ovens cannot adapt to the production of chemical coke, semi-coke, and shaped coke. The shortage of coking coal resources and the overcapacity of metallurgical coke production have resulted in a situation where raw material costs are higher than product prices. The single-product structure cannot adapt to fluctuations in market demand, leading to a continuous increase in the operating pressure on enterprises, ultimately resulting in low production efficiency of mechanized coke ovens.

[0052] To address the aforementioned issues, this application employs electric heating instead of traditional fuel combustion. The electric heater directly heats the carbonization chamber, eliminating combustion exhaust gases and preventing the generation of nitrogen oxides and sulfur oxides at the source. By adjusting the heating power of the electric heater, the heating process temperature can be adapted to produce different coke products from low-rank coal and blended coal. Furthermore, this application utilizes a top-charging coal and bottom-discharging coke oven structure and process, with a coal charging hole at the top and a coke discharge zone at the bottom of the carbonization zone. This solves the problem of difficult discharge of chemical coke and semi-coke produced from weakly caking or non-caking coal, thus enabling the production of various coke products, including metallurgical coke, chemical coke, semi-coke, and shaped coke.

[0053] Figure 1 is a front view internal structure schematic diagram of an electrically heated coke oven provided in an embodiment of this application, and Figure 2 is a side view internal structure schematic diagram of the electrically heated coke oven shown in Figure 1. As shown in Figures 1 and 2, an electrically heated coke oven includes: a furnace top 10, a heating and carbonization zone 20, a coke discharge zone 30, and a coke oven base 40. The furnace top 10, the heating and carbonization zone 20, the coke discharge zone 30, and the coke oven base 40 are arranged sequentially along the height direction Z of the electrically heated coke oven.

[0054] The heating and carbonization zone 20 includes multiple carbonization chambers 21 and multiple heating chambers 22. Along a first direction X, the carbonization chambers 21 and heating chambers 22 are arranged alternately. The first direction X is perpendicular to the height direction Z. The carbonization chambers 21 are used to hold low-rank coal or blended coal. Each heating chamber 22 is equipped with an electric heater 221. The temperature of the electric heater 221 is adjustable to ensure that the low-rank coal in the carbonization chamber 21 can be heated to produce at least one of chemical coke, semi-coke, and shaped coke, and that the blended coal in the carbonization chamber 21 can be heated to produce metallurgical coke. Along a second direction Y, the carbonization chamber 21 sequentially includes a coke side A and a machine side B. The machine side B of the carbonization chamber 21 is provided with a loading point for low-rank coal. The furnace has a machine-side door 211 for coal or blended coal, and a coke-side door 212 for discharging the metallurgical coke on the coke side A of the carbonization chamber 21. The furnace top 10 includes multiple gas outlets 11 and multiple coal charging holes 12. Each carbonization chamber 21 is connected to its corresponding multiple coal charging holes 12, and the multiple gas outlets 11 and multiple carbonization chambers 21 are connected in a one-to-one correspondence. The coke discharge area 30 includes a coke discharge channel 31 and a switchable coke discharge interface 32. The inlet of the coke discharge channel 31 is connected to the carbonization chamber 21, and the coke discharge interface 32 is located at the outlet of the coke discharge channel 31 for discharging at least one of the chemical coke, the semi-coke, and the shaped coke produced by heating the low-rank coal in the carbonization chamber 21.

[0055] In some embodiments, the furnace top 10 is located at the top of the electrically heated coke oven, and the coal charging hole 12 can be connected to the top coal charging machinery to facilitate the loading of coal. The coal charging hole 12 may be equipped with a sealing cover, which is used to seal the coal charging hole 12 during the coking process of the electrically heated coke oven.

[0056] The adjustable temperature of the electric heater 221 means that the heating power of the electric heater 221 can be dynamically adjusted. By adjusting the current or voltage, the temperature range of the carbonization chamber 21 can be controlled to meet the process requirements of different coke products. A partition wall 25 is provided between the carbonization chamber 21 and the heating chamber 22. The electric heater 221 in the heating chamber 22 generates heat by consuming electricity, and the heat is transferred to the coal in the carbonization chamber 21 through the partition wall 25.

[0057] In some embodiments, the gas outlet 11 can be connected to a gas treatment system. The coal (low-rank coal, blended coal) is heated into coke products and gas in the carbonization chamber 21. The gas is discharged from the electrically heated coke oven through the gas outlet 11 and enters the subsequent gas treatment system for recovery.

[0058] In some embodiments, the machine-side furnace door 211 and the coke-side furnace door 212 can be implemented by combining a high-temperature resistant metal door body with a hydraulic or mechanical transmission device. The machine-side furnace door 211 is used for loading raw coal, and the coke-side furnace door 212 is used for directional discharge of metallurgical coke.

[0059] In some embodiments, the heating and carbonization zone 20 may include a first end wall 23 and a second end wall 24, and a plurality of carbonization chambers 21 and a plurality of heating chambers 22 are disposed between the first end wall 23 and the second end wall 24. The first end wall 23 and the second end wall 24 may be walls made of refractory or heat-insulating materials.

[0060] During production, due to the poor coking properties of low-rank coal, it is difficult to form large coke cakes. In the production of chemical coke, semi-coke, and shaped coke using electrically heated coke ovens:

[0061] First, low-rank coal is loaded into the carbonization chamber 21 through multiple coal loading holes 12 on the top of the furnace 10. Closing the coke discharge port 32 can prevent the low-rank coal in the carbonization chamber 21 from being discharged through the coke discharge channel 31.

[0062] Then, the carbonization chamber 21 is heated by the electric heater 221. When producing semi-coke, the heating power of the electric heater 221 is adjusted so that the temperature of the carbonization chamber 21 is between 400°C and 600°C. When producing semi-coke and chemical coke, the heating power of the electric heater 221 is adjusted so that the temperature of the carbonization chamber 21 is between 600°C and 800°C. When producing coke, the heating power of the electric heater 221 is adjusted so that the temperature of the carbonization chamber 21 is between 800°C and 1000°C.

[0063] Finally, open the coke discharge port 32 and connect the coke discharge port 32 to the coke discharge device. The coke product (chemical coke, semi-coke or shaped coke) in the carbonization chamber 21 is transported to the coke discharge device through the coke discharge channel 31 to complete the discharge of the coke product.

[0064] Because the blended coal has good coking properties, it can form large coke cakes. In the process of producing metallurgical coke, electrically heated coke ovens are used in the following steps:

[0065] First, the blended coal is loaded into the carbonization chamber 21 through the machine-side furnace door 211.

[0066] Then, the carbonization chamber 21 is heated by the electric heater 221. The heating power of the electric heater 221 is adjusted so that the temperature of the carbonization chamber 21 is between 800°C and 1000°C.

[0067] Finally, open the coke side furnace door 212 of the carbonization chamber 21 and push the coke product (metallurgical coke) in the carbonization chamber 21 out through the coke side furnace door 212 to complete the discharge of the coke product.

[0068] In some embodiments, during the production of chemical coke, semi-coke, and shaped coke in an electrically heated coke oven, low-rank coal can be loaded into the carbonization chamber 21 through the machine-side furnace door 211.

[0069] In the embodiments of this application, during the steps of producing chemical coke, semi-coke, and shaped coke, low-rank coal or blended coal for producing chemical coke, semi-coke, and shaped coke can be loaded into the carbonization chamber 21 through the machine-side furnace door 211. The electric heater 221 is adjusted to heat the carbonization chamber 21 to the temperature required for the coke product chemical coke, semi-coke, or shaped coke. Because chemical coke, semi-coke, and shaped coke have poor adhesion and are difficult to form large coke cakes, they cannot be discharged using conventional ejection methods. After the low-rank coal forms coke products, the chemical coke, semi-coke, and shaped coke can be discharged from the coke discharge area 30 at the bottom of the carbonization chamber 21. In the step of producing metallurgical coke, blended coal can be fed into the carbonization chamber 21 through the machine-side furnace door 211. The electric heater 221 is adjusted to heat the carbonization chamber 21 to the temperature required for the coke product metallurgical coke. Because the blended coal has good coking adhesion and can form large coke cakes, the metallurgical coke can be ejected through the coke-side furnace door 212. The electrically heated coke oven of this application embodiment, on the one hand, uses electric heating instead of gas heating for coking, without a combustion process, and does not generate additional CO2, SO2, or NO. x The elimination of waste gas is more beneficial to environmental protection and energy conservation. On the other hand, it can adapt to the heating and process requirements of different coke products (metallurgical coke, chemical coke, semi-coke and shaped coke), and can produce high-profit coke products according to the market, which facilitates the improvement of the production efficiency of electric heating coke ovens.

[0070] The coke oven base 40 can be the base plate of an electrically heated coke oven for installation on the ground. The electrically heated coke oven also includes a bottom area 50, which is located between the coke discharge area 30 and the coke oven base 40; the bottom area 50 is provided with an inspection hole 51, which leads to the coke discharge area 30.

[0071] The furnace bottom area 50 may include a refractory wall located between the coke discharge area 30 and the coke oven base 40. In the electrically heated coke oven coking process, the high temperature of the coke discharge area 30 is conducted to the coke oven base 40 below it via the refractory wall, which reduces the temperature conducted to the coke oven base 40, thus protecting it and keeping its temperature below its heat resistance temperature. The inspection hole 51 facilitates maintenance of the coke discharge area 30 while also reducing the overall weight of the electrically heated coke oven, thereby facilitating transportation and handling.

[0072] The coke discharge channel 31 can be constructed of refractory material and can have a certain slope to facilitate smooth material feeding and coke discharge. For example, the outlet side of the coke discharge channel 31 is inclined downwards at an angle greater than 50° to the horizontal. This inclination angle of more than 50° allows the coke product to flow continuously without additional external force during discharge.

[0073] Multiple coke discharge channels 31 are provided, spaced apart along the second direction Y at the bottom of the heating and carbonization zone 20. The inlets of the multiple coke discharge channels 31 are connected to the multiple carbonization chambers 21 in a one-to-one correspondence. The mature coke product in the carbonization chamber 21 falls from the inlets of the multiple coke discharge channels 31 into the outlets of the coke discharge channels 31, and is then discharged through the coke discharge interface 32 at the bottom of the coke discharge zone 30 connected to the coke discharge device.

[0074] In some embodiments, each carbonization chamber 21 is provided with a corresponding coke discharge interface 32; the coke discharge interface 32 is provided on the machine side B or coke side A of the carbonization chamber 21, and the outlets of multiple coke discharge channels 31 are connected to the coke discharge interface 32.

[0075] In some embodiments, each carbonization chamber 21 is provided with two coke discharge ports 32, namely a first coke discharge port and a second coke discharge port. The first coke discharge port is located on the machine side B of the carbonization chamber 21, and the second coke discharge port is located on the coke side A of the carbonization chamber 21. The outlet of a portion of the coke discharge channel 31 near the machine side B is connected to the first coke discharge port, and the outlet of a portion of the coke discharge channel 31 near the coke side A is connected to the second coke discharge port. When the distance between the coke side A and the machine side B of the carbonization chamber 21 is long, the length of the coke discharge channel 31 is also long, which affects the smooth discharge of coke products from the coke discharge channel 31. By providing one coke discharge port 32 (the first coke discharge port and the second coke discharge port) below the coke side A and the machine side B of each carbonization chamber 21, compared to one coke discharge port 32, the length of part of the coke discharge channel 31 can be reduced, making it easier for the coke products to be discharged more smoothly from the coke discharge channel 31.

[0076] When the size of coke products (chemical coke, semi-coke, and molded coke) is large, it can easily lead to uneven descent and difficulty in handling. To improve this problem, a conveying device is further installed within the coke discharge channel 31. Under the conveying device, the coke products (chemical coke, semi-coke, and molded coke) can be stably transported from the inlet to the outlet of the coke discharge channel 31, thus discharging the coke products (chemical coke, semi-coke, and molded coke). The conveying device can be a screw conveyor or a belt conveyor, etc.

[0077] During the coke discharge process of the electrically heated coke oven, the chemical coke, semi-coke, and shaped coke should not come into contact with air. In some embodiments of this application, the coke discharge channel 31 is a sealed channel. This sealed channel connects the carbonization chamber 21 and the coke discharge interface 32. The chemical coke, semi-coke, and shaped coke can be isolated from the outside air and discharged in a sealed manner through the coke discharge channel 31.

[0078] Figure 3 is a schematic diagram of the electrical connection structure of the electrically heated coke oven shown in Figure 1. As shown in Figure 3, the electrically heated coke oven also includes a temperature control system 60, which includes a temperature controller 61 and multiple temperature sensors 62. The multiple temperature sensors 62 are arranged one-to-one in multiple carbonization chambers 21 to sense the temperature of each carbonization chamber 21. The temperature controller 61 is electrically connected to each electric heater 221 and each temperature sensor 62, and adjusts the heating power of the electric heaters 221 of the adjacent heating chambers 22 according to the temperature of each carbonization chamber 21, so that each carbonization chamber 21... The temperature is within the set temperature range; specifically, in low-temperature coking mode, the temperature controller 61 controls the set temperature of each carbonization chamber 21 to be between 400℃ and 600℃, suitable for the production process temperature of semi-coke; in medium-temperature coking mode, the temperature controller 61 controls the set temperature of each carbonization chamber 21 to be between 600℃ and 800℃, suitable for the production process temperature of chemical coke and semi-coke; in high-temperature coking mode, the temperature controller 61 controls the set temperature of each carbonization chamber 21 to be between 800℃ and 1000℃, suitable for the production process temperature of shaped coke and metallurgical coke. Different temperature modes can be used to produce different coke products, and the heating power of each electric heater 221 can be adjusted throughout the heating process to improve the heating uniformity of the coking process in all directions of the electric heating coke oven.

[0079] Specifically, the temperature controller 61 is electrically connected to the central control system of the electric heating coke oven, and the set temperature parameter value is set by the central control system. The heating power of each electric heater 221 is centrally controlled by the central control system, thereby facilitating the overall and local temperature control of the electric heating coke oven.

[0080] From a top-down view, each heating chamber 22 is provided with multiple rows and columns of heating channels, and the heating power of the electric heater 221 in each heating channel is independently adjustable. Figure 4 is a top-down structural schematic diagram of one heating chamber 22 of the electrically heated coke oven shown in Figure 1. As shown in Figure 4, each heating chamber 22 includes at least one first heating channel 222, and an electric heater 221 is provided in each first heating channel 222.

[0081] For example, each heating chamber 22 includes a first heating channel 222.

[0082] Alternatively, each heating chamber 22 may include at least two first heating channels 222 (i.e., two or more first heating channels 222), at least two first heating channels 222 are arranged sequentially along the first direction X, at least two first heating channels 222 are arranged sequentially along the second direction Y, and a first partition wall 22A is provided between two adjacent first heating channels 222 along the first direction X.

[0083] Since multiple first heating channels 222 are arranged in the first direction X and the second direction Y, the temperature at different positions of the carbonization chamber 21 can be easily adjusted by regulating the heating power of each electric heater 221 throughout the heating process, thereby further improving the heating uniformity of the coking process in all directions of the electrically heated coke oven. Furthermore, since a first partition wall 22A is provided between two adjacent first heating channels 222 along the first direction X, the electric heater 221 on one side of the first partition wall 22A can be adjusted individually, reducing the impact on the heating temperature of the carbonization chamber 21 on the other side of the first partition wall 22A.

[0084] As shown in Figures 1 and 4, each first heating channel 222 is arranged along the height direction Z; the furnace top 10 is equipped with multiple temperature regulators 13, and the multiple temperature regulators 13 are electrically connected to multiple electric heaters 221 in a one-to-one correspondence. During production, workers can conveniently adjust the temperature of the electric heaters 221 on-site through the temperature regulators 13.

[0085] The furnace top 10 is equipped with multiple first electric heater replacement ports, each connected to a corresponding first heating channel 222. These ports are used to replace the electric heaters 221 within the first heating channel 222. When an electric heater 221 in a first heating channel 222 malfunctions, the operator vertically removes the damaged component through the corresponding replacement port. During replacement, the partition walls between adjacent first heating channels 222 maintain structural stability to prevent heat leakage.

[0086] In specific implementations, the structure of the heating chamber 22 can have various structural forms, not limited to the structure of the heating chamber 22 described in the above embodiments. It can also be other structural forms. For example, in the side view direction, each heating chamber 22 is provided with multiple rows and columns of heating channels, and the heating power of the electric heater 221 of each heating channel is independently adjustable. Figure 5 is a side view internal structural diagram of another heating chamber 22 of an electric heating coke oven provided in an embodiment of this application. As shown in Figure 5, each heating chamber 22 includes a second heating channel 223 and a third heating channel 224. An electric heater 221 is provided in both the second heating channel 223 and the third heating channel 224. Along the second direction Y, the second heating channel 223 and the third heating channel 224 are arranged sequentially, and a second partition wall 22B is provided between the second heating channel 223 and the third heating channel 224.

[0087] In the second direction Y, two heating channels (second heating channel 223 and third heating channel 224) are provided, which can make the electric heater 221 shorter in length. Under the action of gravity, the electric heater 221 is not easily bent and damaged by gravity.

[0088] On the coke side (A) near the carbonization chamber 21, the second heating channel 223 is provided with a second electric heater replacement port for replacing the electric heater 221 within the second heating channel 223. On the machine side (B) near the carbonization chamber 21, the third heating channel 224 is provided with a third electric heater replacement port for replacing the electric heater 221 within the third heating channel 224. In the event of a malfunction of the electric heater 221, workers can easily maintain or replace it on the side of the electrically heated coke oven (coke side A, machine side B) via the second or third electric heater replacement port.

[0089] Specifically, a temperature regulator 13 electrically connected to the electric heater 221 of the second heating channel 223 is provided on the coke side A of the carbonization chamber 21. A temperature regulator 13 electrically connected to the electric heater 221 of the third heating channel 224 is provided on the machine side B of the carbonization chamber 21.

[0090] The embodiments of this scheme use electric heating to realize the coal dry distillation process. Compared with coke ovens that use traditional chemical fuels for heating, the heating energy is cleaner, the energy consumption is more controllable, and there is no waste of heat energy due to the heat carried by the exhaust gas. Compared with traditional coke ovens, the electric heating coke oven has a simplified body structure and civil engineering structure, which reduces construction investment and construction intensity. The coke oven is safer, more economical and more environmentally friendly throughout its life cycle.

[0091] Furthermore, embodiments of this solution can modify conventional coke ovens (such as top-loading, tamping coke ovens, and vertical heat recovery coke ovens) to use electric heating instead of gas heating for coking. Specifically, the conventional coke oven combustion chamber is replaced with a heating chamber 22 equipped with an electric heater 221, the lower inclined chute and regenerator are eliminated, and a coke discharge zone 30 is provided at the bottom of the carbonization chamber 21. Below the coke discharge zone 30 are the furnace bottom zone 50 and the coke oven base 40, respectively. Through this modification, CO2, SO2, and NO are not produced. x It can process waste gas and adapt to the production process requirements of different coke products (metallurgical coke, chemical coke, semi-coke and shaped coke), and can produce high-profit coke products according to the market, thereby improving the production efficiency of coke ovens.

[0092] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. An electrically heated coke oven, characterized in that, include: The coke oven comprises a furnace top (10), a heating and carbonization zone (20), a coke discharge zone (30), and a coke oven base (40), arranged sequentially along the height direction (Z) of the electrically heated coke oven. The heating and carbonization zone (20) includes multiple carbonization chambers (21) and multiple heating chambers (22). Along a first direction (X), the carbonization chambers (21) and the heating chambers (22)... Alternating arrangement, with the first direction (X) and the height direction (Z) perpendicular, the carbonization chamber (21) is used to hold low-rank coal or blended coal, and each heating chamber (22) is equipped with an electric heater (221). The temperature of the electric heater (221) is adjustable to ensure that the low-rank coal in the carbonization chamber (21) can be heated to produce at least one of chemical coke, semi-coke, and shaped coke, and that the blended coal in the carbonization chamber (21) can be heated to produce metallurgical coke; along the second direction (Y), the... The carbonization chamber (21) includes a coke side (A) and a machine side (B) in sequence. The machine side (B) of the carbonization chamber (21) is provided with a machine side furnace door (211) for loading low-rank coal or blended coal, and the coke side (A) of the carbonization chamber (21) is provided with a coke side furnace door (212) for discharging the metallurgical coke. The furnace top (10) includes multiple gas outlets (11) and multiple coal charging holes (12). Each carbonization chamber (21) is connected to its corresponding multiple coal charging holes (12). 12) Multiple gas outlets (11) and multiple carbonization chambers (21) are connected in a one-to-one correspondence; the coke discharge area (30) includes a coke discharge channel (31) and a switchable coke discharge interface (32). The inlet of the coke discharge channel (31) is connected to the carbonization chamber (21), and the coke discharge interface (32) is located at the outlet of the coke discharge channel (31) for discharging at least one of the chemical coke, the semi-coke and the shaped coke produced by heating the low-rank coal in the carbonization chamber (21).

2. The electrically heated coke oven according to claim 1, characterized in that, There are multiple coke discharge channels (31), which are spaced apart at the bottom of the heating and carbonization zone (20) along the second direction (Y). The entrances of the multiple coke discharge channels (31) are connected to the multiple carbonization chambers (21) in a one-to-one correspondence.

3. The electrically heated coke oven according to claim 2, characterized in that, Each carbonization chamber (21) is provided with one coke discharge port (32); the coke discharge port (32) is located on the machine side (B) or coke side (A) of the carbonization chamber (21), and the outlets of multiple coke discharge channels (31) are connected to the coke discharge port (32); or, each carbonization chamber (21) is provided with two coke discharge ports (32), which are respectively the first coke discharge port and the second coke discharge port; the first coke discharge port is located on the machine side (B) of the carbonization chamber (21), and the second coke discharge port is located on the coke side (A) of the carbonization chamber (21); the outlets of some coke discharge channels (31) near the machine side (B) are connected to the first coke discharge port; the outlets of some coke discharge channels (31) near the coke side (A) are connected to the second coke discharge port.

4. The electrically heated coke oven according to claim 1, characterized in that, The outlet side of the coke discharge channel (31) is inclined downward, and the inclination angle in the horizontal direction is greater than 50°.

5. The electrically heated coke oven according to claim 1, characterized in that, The coke discharge channel (31) is equipped with a conveying device.

6. The electrically heated coke oven according to claim 1, characterized in that, Each heating chamber (22) includes at least one first heating channel (222), and each first heating channel (222) is provided with an electric heater (221); when each heating chamber (22) includes at least two first heating channels (222), the at least two first heating channels (222) are arranged sequentially along the first direction (X), and the at least two first heating channels (222) are arranged sequentially along the second direction (Y), such that a first partition wall (22A) is provided between two adjacent first heating channels (222) along the first direction (X).

7. The electrically heated coke oven according to claim 6, characterized in that, Each first heating channel (222) is arranged along the height direction (Z); the furnace top (10) is provided with multiple temperature regulators (13), and the multiple temperature regulators (13) and multiple electric heaters (221) are electrically connected in a one-to-one correspondence.

8. The electrically heated coke oven according to claim 7, characterized in that, The furnace top (10) is provided with multiple first electric heater replacement ports, and the multiple first electric heater replacement ports are connected to multiple first heating channels (222) in a one-to-one correspondence. The first electric heater replacement ports are used to replace the electric heaters (221) in the first heating channels (222).

9. The electrically heated coke oven according to claim 1, characterized in that, Each heating chamber (22) includes a second heating channel (223) and a third heating channel (224), and an electric heater (221) is provided in both the second heating channel (223) and the third heating channel (224); the second heating channel (223) and the third heating channel (224) are arranged sequentially along the second direction (Y), and a second partition wall (22B) is provided between the second heating channel (223) and the third heating channel (224).

10. The electrically heated coke oven according to claim 9, characterized in that, On the coke side (A) near the carbonization chamber (21), the second heating channel (223) is provided with a second electric heater replacement port, which is used to replace the electric heater (221) in the second heating channel (223); on the machine side (B) near the carbonization chamber (21), the third heating channel (224) is provided with a third electric heater replacement port, which is used to replace the electric heater (221) in the third heating channel (224).

11. The electrically heated coke oven according to claim 1, characterized in that, Also includes: A furnace bottom area (50) is provided between the coke discharge area (30) and the coke oven base (40); the furnace bottom area (50) is provided with an inspection hole (51) which leads to the coke discharge area (30).

12. The electrically heated coke oven according to any one of claims 1 to 11, characterized in that, Also includes: The temperature control system (60) includes a temperature controller (61) and multiple temperature sensors (62). The multiple temperature sensors (62) are arranged one-to-one in multiple carbonization chambers (21) to sense the temperature of each carbonization chamber (21). The temperature controller (61) is electrically connected to each electric heater (221) and each temperature sensor (62), and adjusts the heating power of the electric heaters (221) of the adjacent heating chambers (22) according to the temperature of each carbonization chamber (21). The temperature of each carbonization chamber (21) is within the set temperature range; wherein, in the low-temperature coking mode, the temperature controller (61) controls the set temperature of each carbonization chamber (21) to be between 400°C and 600°C; in the medium-temperature coking mode, the temperature controller (61) controls the set temperature of each carbonization chamber (21) to be between 600°C and 800°C; and in the high-temperature coking mode, the temperature controller (61) controls the set temperature of each carbonization chamber (21) to be between 800°C and 1000°C.

13. The electrically heated coke oven according to any one of claims 1 to 11, characterized in that, The coke discharge channel (31) is a sealed channel.

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