One-step carbonization activation coke oven and coke making system and method

Abstract

The present invention discloses a one-step carbonization and activation coke oven and a coke making system and method, wherein the one-step carbonization and activation coke oven comprises a furnace body; a carbonization section, an activation section, and a cooling section are sequentially arranged in the furnace body from top to bottom, and the carbonization section, activation section, and cooling section are connected by a plurality of material channels and a plurality of flue gas channels arranged at intervals; a portion of the material channel located in the carbonization section is provided with a plurality of oxygen supply grids, and a portion of the material channel located in the activation section is provided with a plurality of gas channels; two adjacent flue gas channels and the material channel are connected by a plurality of precipitated gas channels; the plurality of precipitated gas channels and the plurality of gas channels all form a zigzag channel in the material channel. The one-step carbonization and activation coke oven of the present invention can ensure that the material is continuously turned and stirred during the falling process, thereby improving the carbonization and activation effect and uniformity, reducing the preparation time, increasing the coke oven output, and saving energy.

Description

Technical Field

[0001] The invention belongs to the technical field of activated coke preparation, and in particular relates to a one-step carbonization activation coke making furnace and a coke making system and method. Background Art

[0002] Coal is both a fuel and a cheap and readily available raw material for preparing carbon materials. Currently, activated coke used for desulfurization and denitrification is all prepared from coal. The existing carbonization and activation equipment for preparing activated coke is a horizontal rotary kiln and a vertical slep furnace. The horizontal rotary kiln rotates the furnace body at a certain angle to achieve material turnover, thereby achieving material carbonization and contact activation with the activator. However, the horizontal rotary kiln has problems such as large footprint, high investment cost, and low temperature control accuracy. The vertical slep furnace is made of refractory materials with staggered material channels and flues. Both the flue and material channels are thin rectangular channels. The material channels are in a compacted state during the falling process and cannot be turned or stirred. This has a great impact on the carbonization and activation effects, resulting in large fluctuations in product quality and poor equipment flexibility. At the same time, the vertical slep furnace has a small material channel, resulting in an excessively large equipment volume and a large footprint.

[0003] The material channel and flue of the vertical Slep furnace are arranged in an alternating manner, and the furnace body is arranged in a square shape. Both the flue and material channels are thin-layer rectangular channels. The material channel is narrow in width, and the cross-section of the heat-resistant bricks accounts for a large proportion, resulting in a larger furnace body size. The material channel is in a compacted state during the falling process and cannot be flipped and stirred, which has a great impact on the carbonization and activation effects, resulting in large fluctuations in product quality and poor equipment flexibility. Due to insufficient activation, the activation time is too long to ensure product quality, and the coke oven output is low. The activation steam of the vertical Slep furnace is generated by switching the left and right combustion chamber heat storage bricks, and the process is complicated. Summary of the Invention

[0004] In view of this, one object of the present invention is to propose a one-step carbonization and activation coke oven, in which a carbonization section, an activation section and a cooling section connected by a material channel and a flue gas channel are sequentially arranged in the furnace body from top to bottom, and a plurality of precipitation gas channels and a plurality of gas channels form "Z"-shaped channels in the material channel. When the material passes through the carbonization section and the activation section from top to bottom, it continuously rolls and stirs in the "Z"-shaped channel, and there is no problem of agglomeration and flue gas dead zone with a "Z"-shaped falling trajectory. The precipitation gas can be discharged in time during the carbonization process, and the activated gas is in full contact with the material during the activation process, so the activation effect is good and the quality of the activated coke is uniform. At the same time, the material is not simply dropped vertically in the coke oven, but rolls and mixes left and right, which increases the travel of the material in the oven, so that the best effect can be achieved with a smaller size of the coke oven. The equipment is compact, occupies a small area and has a low investment cost.

[0005] Another object of the present invention is to provide a coking system.

[0006] Another object of the present invention is to provide a method for preparing activated coke.

[0007] To achieve the above-mentioned object, a first embodiment of the present invention provides a one-step carbonization activation coke oven, comprising a furnace body;

[0008] The furnace body is provided with a raw coal inlet at the top and an activated coke outlet at the bottom. A carbonization section, an activation section, and a cooling section are sequentially provided in the furnace body from top to bottom. The carbonization section, activation section, and cooling section are connected by a plurality of material channels and a plurality of flue gas channels arranged at intervals. The upper end of the material channel is connected to the raw coal inlet, and the lower end is connected to the activated coke outlet. The portion of the material channel located in the carbonization section is provided with a plurality of oxygen supply grids, and the portion of the material channel located in the activation section is provided with a plurality of gas channels.

[0009] Two adjacent flue gas channels and the material channel are connected through a plurality of precipitation gas channels; the plurality of precipitation gas channels and the plurality of gas channels form zigzag channels in the material channel; the portion of the flue gas channel located in the carbonization section and the portion of the activation section are both provided with a plurality of air grilles.

[0010] The one-step carbonization and activation coke making furnace of the embodiment of the present invention is provided with a carbonization section, an activation section and a cooling section connected through a material channel and a flue gas channel in sequence from top to bottom in the furnace body, and a plurality of precipitated gas channels and a plurality of gas channels form a zigzag channel in the material channel. When the material passes through the carbonization section and the activation section from top to bottom, it is continuously rolled and stirred in the zigzag channel and falls in a zigzag trajectory. There is no problem of agglomeration and flue gas dead zone. The precipitated gas can be discharged in time during the carbonization process. During the activation process, the activated gas is in full contact with the material, the activation effect is good, and the quality of the activated coke is uniform.

[0011] In addition, the carbonization activation coke oven proposed in the above embodiment of the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, a number of precipitation gas channels and a number of gas channels are divided into a first group and a second group, wherein the number of precipitation gas channels and the number of gas channels in the first group are distributed from top to bottom on the first side of the material channel and inclined toward the first direction, and the number of precipitation gas channels and the number of gas channels in the second group are distributed from top to bottom on the second side of the material channel and inclined along the second direction, the first side and the second side are arranged relative to each other, and the first direction and the second direction are arranged relative to each other; the number of precipitation gas channels in the first group and the number of precipitation gas channels in the second group are spaced apart, and the number of gas channels in the first group and the number of gas channels in the second group are spaced apart.

[0013] In some embodiments of the present invention, all product gas channels and all gas channels are evenly distributed.

[0014] In some embodiments of the present invention, the plurality of separation gas channels in the first group and the plurality of gas channels in the first group are both arranged at 100-120° to the horizontal plane; the plurality of separation gas channels in the second group and the plurality of gas channels in the second group are both arranged at 60-80° to the horizontal plane.

[0015] In some embodiments of the present invention, the horizontal distances of the precipitated gas channel and the gas channel extending into the material channel are both 20-60% of the width of the material channel.

[0016] In some embodiments of the present invention, the one-step carbonization activation coke oven further includes a steam superheating pipeline, which is arranged in the portion of the activation section within the plurality of flue gas channels; one end of the steam superheating pipeline is connected to the plurality of gas channels, and the other end is connected to the activation gas source.

[0017] In some embodiments of the present invention, the material of the steam superheating pipeline is silicon carbide or high-temperature alloy; a plurality of furnace bricks are provided in the furnace body, and the plurality of furnace bricks divide the space in the furnace body into the material channel and the flue gas channel arranged at intervals; a first partition is sealed and installed at the connection between the upper end of the flue gas channel and the raw coal inlet, and a second partition is sealed and installed at the connection between the lower end and the activated coke outlet.

[0018] In some embodiments of the present invention, the one-step carbonization activation coke oven further includes a flue gas outlet; the flue gas outlet is arranged on the side wall of the furnace body, and the flue gas outlet is located between the activation section and the cooling section; a cooling coil is arranged in the cooling section.

[0019] To achieve the above object, a second embodiment of the present invention provides a coking system, comprising the one-step carbonization and activation coking oven, a combustion chamber, and a waste heat boiler as described above, which are connected in sequence;

[0020] A first steam pipeline and a first air pipeline are provided in the combustion chamber; the outlet of the first steam pipeline is connected to a plurality of gas channels; the first outlet of the first air pipeline is connected to a plurality of oxygen supply grids and a plurality of air grids, and the second outlet of the first air pipeline is connected to a plurality of gas channels;

[0021] A second steam pipeline and a second air pipeline are provided in the waste heat boiler; the outlet of the second steam pipeline is connected to the inlet of the first steam pipeline, and the outlet of the second air pipeline is connected to the inlet of the first air pipeline.

[0022] The coking system of the embodiment of the present invention has the following beneficial effects in addition to the beneficial effects of the one-step carbonization activation coking oven of the embodiment of the present invention:

[0023] (1) The activation temperature is controllable and the activation effect is good.

[0024] Since the activated steam passes through the waste heat boiler, combustion chamber and flue superheating process in sequence, the steam is in a superheated state and contacts the activated material. The activation reaction occurs rapidly, which can stabilize the activation temperature of the activation section and improve the activation performance of the activated coke.

[0025] (2) The preparation process is simple and the cost is low.

[0026] The carbonization section and activation section are integrated. The material enters the activation section directly after carbonization. At the same time, the superheated activation gas water vapor is obtained by utilizing the waste heat of the flue gas. No additional equipment is required, the process is simple and the cost is low.

[0027] To achieve the above-mentioned object, a third embodiment of the present invention provides a method for preparing activated coke, comprising:

[0028] The raw coal particles enter the material channel of the carbonization section and, in the process of falling by their own weight, collide and tumble with the parts of several precipitation gas channels extending into the material channel, and follow a zigzag route in the material channel. The volatile matter and tar precipitated during the carbonization process are preliminarily burned in the material channel under the action of oxygen supplied by the oxygen supply grid, and then enter the flue gas channel through the precipitation gas channel. The air supplied by the air grid is further burned, and the flue gas passes through the activation section from top to bottom, enters the combustion chamber from the flue gas outlet, and is burned again, and then enters the waste heat boiler for heat exchange utilization; the oxygen supply grid in the material channel supplies air, so that the raw coal particles are partially burned to supplement heat.

[0029] After the raw coal particles are carbonized, the carbonized material enters the activation section and collides with the portions of the gas channels extending into the material channel, causing the material to tumble. Water vapor and afterburning air enter from the gas channels and contact the rolling and falling carbonized material for activation. Water gas and unreacted water vapor generated in the activation section flow upward along the material channel, contact the carbonized material in countercurrent flow, and then enter the carbonization section and be discharged from the precipitated gas channel into the flue gas channel for combustion.

[0030] The activated material obtained after the carbonized material is activated enters the cooling section and is cooled and then discharged.

[0031] The beneficial effects of the activated coke preparation method according to the embodiment of the present invention are substantially the same as the beneficial effects of the coke making system according to the embodiment of the present invention, and are not described in detail here.

[0032] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 It is a structural schematic diagram (main viewing direction) of a one-step carbonization activation coke oven according to one embodiment of the present invention.

[0035] Figure 2 3 is a schematic diagram of a simple structure of a coking system according to an embodiment of the present invention, wherein a one-step carbonization activation coking oven is a cross-sectional diagram of the furnace channel).

[0036] Reference numerals:

[0037] 1-furnace body; 2-flue gas channel; 3-material channel; 301-first side; 302-second side; 4-oxygen supply grid; 5-extracted gas channel; 6-air grid; 7-gas channel; 8-furnace brick; 9-steam superheating pipeline; 10-cooling coil; 11-combustion chamber; 12-waste heat boiler; 13-first steam pipeline; 14-first air pipeline; 15-second steam pipeline; 16-second air pipeline; 17-carbonization section; 18-activation section; 19-cooling section; 20-raw coal inlet; 21-activated coke outlet; 22-first partition; 23-flue gas outlet; 24-second partition. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] In the embodiments of the present invention, the devices and apparatuses involved, unless otherwise specified, are all commercially available devices and apparatuses.

[0040] The following describes a one-step carbonization and activation coke making furnace, a coke making system, and an activated coke preparation method according to embodiments of the present invention with reference to the accompanying drawings.

[0041] Figure 1 It is a structural schematic diagram (main viewing direction) of a one-step carbonization activation coke oven according to one embodiment of the present invention.

[0042] like Figure 1As shown, the one-step carbonization and activation coke making oven of the embodiment of the present invention includes a furnace body 1; a raw coal inlet 20 is provided on the top of the furnace body 1, an activated coke outlet 21 is provided on the bottom of the furnace body, and a carbonization section 17, an activation section 18 and a cooling section 10 are sequentially provided in the furnace body 1 from top to bottom, and the carbonization section 17, the activation section 18 and the cooling section 10 are connected by a plurality of material channels 3 and a plurality of flue gas channels 2 arranged at intervals; the upper end of the material channel 3 is connected to the raw coal inlet 20, and the lower end is connected to the activated coke outlet 21; a portion of the material channel 3 located in the carbonization section 17 is provided with a plurality of oxygen supplementing grids 4, and a portion of the material channel 3 located in the activation section 18 is provided with a plurality of gas channels 7; two adjacent flue gas channels 2 and the material channel 3 are connected by a plurality of precipitation gas channels 5; the plurality of precipitation gas channels 5 and the plurality of gas channels 7 form a zigzag channel in the material channel 3; a portion of the flue gas channel 2 located in the carbonization section 17 and a portion of the activation section 18 are provided with a plurality of air grids 6.

[0043] The one-step carbonization and activation coke making furnace of the embodiment of the present invention is provided with a carbonization section, an activation section and a cooling section connected through a material channel and a flue gas channel in sequence from top to bottom in the furnace body, and a plurality of precipitated gas channels and a plurality of gas channels form a zigzag channel in the material channel. When the material passes through the carbonization section and the activation section from top to bottom, it is continuously rolled and stirred in the zigzag channel and falls in a zigzag trajectory. There is no problem of agglomeration and flue gas dead zone. The precipitated gas can be discharged in time during the carbonization process. During the activation process, the activated gas is in full contact with the material, the activation effect is good, and the quality of the activated coke is uniform.

[0044] Optionally, in order to ensure that a zigzag channel is formed in the same material channel, a number of precipitation gas channels and a number of gas channels are staggered up and down on both sides of the material channel, specifically: a number of precipitation gas channels 5 and a number of gas channels 7 are divided into two groups, a first group and a second group, wherein the number of precipitation gas channels 5 and a number of gas channels 7 in the first group are distributed from top to bottom on the first side 301 in the material channel 3 and are inclined in the first direction, and the number of precipitation gas channels 5 and a number of gas channels 7 in the second group are distributed from top to bottom on the second side 302 in the material channel 3 and are inclined in the second direction, the first side 301 and the second side 302 are arranged relative to each other, and the first direction and the second direction are arranged relative to each other; the number of precipitation gas channels 5 in the first group and the number of precipitation gas channels 5 in the second group are arranged at intervals, and the number of gas channels 7 in the first group and the number of gas channels 7 in the second group are arranged at intervals. As Figure 1Said first side and second side can be respectively the left side and right side in the same material channel, the first direction can be a direction inclined from the upper left to the lower right, and the second direction can be a direction inclined from the upper right to the lower left. Optionally, in some embodiments, the plurality of precipitated gas channels 5 in the first group and the plurality of gas channels 7 in the first group are arranged at 100-120° to the horizontal plane; the plurality of precipitated gas channels 5 in the second group and the plurality of gas channels 7 in the second group are arranged at 60-80° to the horizontal plane. Optionally, in some embodiments, the horizontal distances of the precipitated gas channels 5 and the gas channels 7 extending into the material channel 3 are both 20-60% of the material channel width. As a possible example, 50% can be selected.

[0045] Optionally, in order to ensure a balanced feeding speed in the entire carbonization section and activation section, all the precipitation gas channels 5 and all the gas channels 7 are evenly distributed. It can be understood here that several precipitation channels and several gas channels are on the first side of the same material channel 3 (for example Figure 1 left side) and the second side (e.g. Figure 1 The middle right side) is arranged at equal intervals above and below, and between the first and second sides ( Figure 1 They are arranged at equal intervals on the left and right sides.

[0046] Optionally, regarding the multiple, spaced-apart material channels and multiple flue gas ducts of the present invention, this can be achieved by providing multiple furnace bricks 8 within the furnace body 1, which divide the space within the furnace body 1 into the spaced-apart material channels 3 and flue gas ducts 2. Preferably, the multiple furnace bricks 8 are arranged in parallel within the furnace body, with a first baffle 22 sealed (e.g., welded) at their upper ends where they connect to the raw coal inlet 20. Their lower ends extend to the activated coke outlet 21 and are sealed (e.g., welded) at their lower ends where they connect to the activated coke outlet 21. Both the front and rear sides are sealed and fixedly connected to the inner wall of the furnace body by welding or other means. Preferably, the furnace bricks 8 are made of silicon carbide bricks.

[0047] Optionally, in some embodiments, in order to provide activation gas to the activation section, a steam superheating pipeline 9 is further provided. The steam superheating pipeline 9 is arranged in the portion of the activation section 18 within the plurality of flue gas channels 2; one end of the steam superheating pipeline 9 is connected to the plurality of gas channels 7, and the other end extends out of the first mounting hole on the furnace body to be connected to the activation gas source, which may be a water vapor pipeline, etc.

[0048] Optionally, the steam superheating pipe 9 is made of a high-temperature alloy material such as silicon carbide or a high-temperature nickel-based alloy material, wherein the high-temperature nickel-based alloy material may be a Ni-Cr alloy, such as GH2747, GH3030, etc.

[0049] It should be noted that the connecting structure between the gas channel and the steam superheating pipeline is not limited. In some embodiments, in order to connect the gas channel with the steam superheating pipeline, its connecting structure can be: the steam superheating pipeline includes a plurality of vertical pipes, a first horizontal pipe and a plurality of second horizontal pipes, one end of the first horizontal pipe extends out of the first mounting hole on the furnace body to connect to the activation gas source, and the other end passes through the second mounting holes on each furnace brick in turn; the parts of the plurality of first horizontal pipes located in each flue gas channel are connected to a vertical pipe, each vertical pipe is installed in its corresponding flue gas channel, and is vertically arranged from top to bottom in the activation section, each vertical pipe is connected to a plurality of second horizontal pipes, each second horizontal pipe passes through the third mounting hole provided on the furnace brick to connect to a gas channel 7, the gas channel 7 is inserted into the end of the third mounting hole close to one end of the furnace brick, and the outer surface is welded to the third mounting hole.

[0050] In some embodiments, a plurality of furnace bricks 8 are provided with a plurality of precipitation gas channel mounting holes, and a plurality of precipitation gas channels 5 are fixedly installed in the corresponding precipitation gas channel mounting holes by welding or the like. In some embodiments, the side of the plurality of precipitation gas channels 5 close to the flue gas channel can extend into the flue gas channel or the end thereof can be flush with the furnace bricks; in other embodiments, the end of the side of the plurality of precipitation gas channels 5 close to the flue gas channel can even be welded to a certain part in the precipitation gas channel mounting hole.

[0051] In some embodiments, the precipitation gas channel 5 and the gas channel 7 are both inclined baffle structures arranged along the width direction of the furnace body (front-to-back direction), and these inclined baffle structures are all hollow structures. The inclined baffle structure serving as the precipitation gas channel 5 is located in the material channel and in the smoke channel (or in the position adjacent to the smoke channel) and is provided with a plurality of vents for smoke to pass through. In this way, smoke can circulate between the material channel and the smoke channel through the vents. The inclined baffle structure serving as the gas channel 7 is provided with a plurality of activated gas vents on its entire surface, and an activated gas inlet is provided on the side adjacent to the furnace brick. In this way, after the activated gas enters the gas channel from the activated gas inlet, the activated gas vents can be distributed to the material channel. In other embodiments, the precipitation gas channel 5 and the gas channel 7 are both inclined baffle structures arranged along the width direction of the furnace body (front-to-back direction), but the cross-section of these inclined baffle structures themselves perpendicular to the inclined direction is annular, that is, both ends are open at one end of the material channel and the end close to the smoke channel. In this way, the inclined baffle structure itself acts as a gas circulation tube.

[0052] As a possible implementation, in a one-step carbonization and activation coke oven according to an embodiment of the present invention, a plurality of oxygen supply grids 4 are evenly spaced from top to bottom within the carbonization section of each material channel 3. Furthermore, a plurality of air grids 6 are evenly spaced from top to bottom within the carbonization and activation sections of the flue gas duct 2. The structures of the oxygen supply grids 4 and 6 are similar to those of existing ammonia injection grids. They can be mounted on the side walls of the furnace, with the gas outlets extending into the corresponding material channel or flue gas duct.

[0053] In the present invention, air grilles are installed in the flue gas ducts of the carbonization section and the activation section, and the amount of air added is controlled in sections. This is because the carbonization section releases volatile matter, tar, etc., and the activation section produces water gas. The gases released from the carbonization section and the activation section need to be introduced into the flue gas duct. The carbonization section and the activation section require different amounts of heat, and the calorific value of the combustible components is also different. Therefore, appropriate amounts of air are added at different locations for initial combustion to provide heat for the carbonization section and the activation section of the coke oven. At this time, the combustible gas in the flue gas duct is not completely burned, and then enters the combustion furnace for complete combustion. The activation section of the flue gas duct is also equipped with an air grille because it can provide oxygen and burn the combustible gas to supplement the heat required by the activation section. In addition, the activation section of the flue gas duct has a superheated steam pipeline, which uses the flue gas to further heat the superheated steam, and then enters the activation section channel to activate the activated coke.

[0054] Optionally, the one-step carbonization and activation coke oven further includes a flue gas outlet 23, which is provided on the side wall of the furnace body 1 and is located between the activation section 18 and the cooling section 10. A cooling coil 10 is disposed within the cooling section 10. The upper end of the cooling coil 10 passes through holes in each of the material channels 3, the flue gas passage 2, and the furnace bricks 8, and is welded to the furnace bricks 8. The upper end extends out of the furnace body through a coil mounting hole in the side wall of the furnace body. The lower end is located above the activated coke outlet and extends out of the furnace body through another coil mounting hole.

[0055] The operating method of the one-step carbonization activation coke oven according to the embodiment of the present invention is as follows:

[0056] The air grids 6 and the oxygen supply grids 4 are all connected to an air source (such as an air pipeline) outside the furnace body 1 , and the gas channels 7 are all connected to an activation gas source (such as a steam pipeline) outside the furnace body 1 .

[0057] The raw coal particles first enter the material channel 3 corresponding to the carbonization section 17. During the process of falling by their own weight, they collide and roll with the part of the staggered gas channel 5 extending into the material channel 3, and take a zigzag route in the furnace. The volatile matter, tar, etc. released during the carbonization process are preliminarily burned in the material channel under the action of the air supplemented by the oxygen supply grid 4, and then enter the flue gas channel 2 through the gas supply channel 5. The air supplemented by the air grid 6 further burns. At the same time, the oxygen supply grid 4 in the material channel 3 also supplements air, so that the coal particles burn slightly to supplement heat; after entering the activation section, the carbonized material collides and rolls with the part of the staggered gas channel 7 extending into the material channel 3, and water vapor and combustion air enter from the gas channel 7, contact and activate the rolling and falling material; the activated material enters the cooling section, is cooled by the cooling coil 10, and is discharged.

[0058] The precipitated gas, tar, etc. from the carbonization section enters the flue gas channel 2 and burns. The flue gas passes through the activation section from top to bottom and is discharged from the flue gas outlet 23 at the bottom of the activation section.

[0059] The water gas and unreacted water vapor generated in the activation section move upward along the material channel 3, come into countercurrent contact with the material, and then enter the carbonization section and are discharged from the precipitated gas channel 5 into the flue gas channel 2 for combustion.

[0060] It should be noted that in the present invention, tar is precipitated in the carbonization section, and air is added to the material channel, so that the tar can be directly preliminarily burned, and then enter the flue gas channel through the precipitation gas channel for further combustion. The advantage of this solution is that the tar is pre-oxidized or preliminarily burned after precipitation, and then further burned, so as to prevent tar condensation, adhesion of materials, and clogging of the precipitation gas channel.

[0061] like Figure 2 As shown, the coking system of an embodiment of the present invention includes a one-step carbonization and activation coking oven, a combustion chamber 11 and a waste heat boiler 12 of an embodiment of the present invention which are connected in sequence; a first steam pipeline 13 and a first air pipeline 14 are provided in the combustion chamber 11; the outlet of the first steam pipeline 13 is connected to a plurality of gas channels 7; the first outlet of the first air pipeline 14 is connected to a plurality of oxygen supply grids 4 and a plurality of air grids 6, and the second outlet of the first air pipeline 14 is connected to a plurality of gas channels 7; a second steam pipeline 15 and a second air pipeline 16 are provided in the waste heat boiler 12; the outlet of the second steam pipeline 15 is connected to the inlet of the first steam pipeline 13, and the outlet of the second air pipeline 16 is connected to the inlet of the first air pipeline 14.

[0062] Optionally, the flue gas outlet of the combustion chamber 11 is connected to the flue gas inlet of the waste heat boiler 12, and the flue gas outlet of the waste heat boiler 12 is connected to the chimney. The inlet of the second steam pipeline 15 is connected to the water vapor source; the inlet of the second air pipeline 16 is connected to the air source.

[0063] Optionally, the structures of the first steam line 13, the first air line 14, the second steam line 15, and the second air line 16 are not limited, as long as they can exchange heat with the heat medium (e.g., flue gas) in the combustion chamber and the waste heat boiler. In some embodiments, the first steam line 13, the first air line 14, the second steam line 15, and the second air line 16 can all be heat exchange coils. Because the temperature in the combustion chamber is higher than the temperature in the waste heat boiler, the temperature of the first steam line is higher than that of the second steam line, and the temperature of the first air line is higher than that of the second air line.

[0064] It should be noted that, except for the first steam pipeline 13 and the first air pipeline 14, the parts of the combustion chamber are all existing structures, and except for the second steam pipeline 15 and the second air pipeline 16, the parts of the waste heat boiler are all existing structures, which will not be described in detail here.

[0065] The method for preparing activated coke according to the embodiment of the present invention (i.e., the method for operating the coking system according to the embodiment of the present invention) comprises: raw coal particles enter the material channel 3 of the carbonization section 17, and in the process of falling by their own weight, collide with and tumble with the parts of the several precipitation gas channels 5 extending into the material channel 3, and take a zigzag route in the material channel 3. The volatile matter, tar, etc. precipitated during the carbonization process are preliminarily burned in the material channel under the action of the air supplied by the oxygen supply grid 4, and then enter the flue gas channel 2 through the precipitation gas channel 5, and are further burned by the air supplied by the air grid 6. The flue gas passes through the activation section 18 from top to bottom, enters the combustion chamber 11 from the flue gas outlet 23, and is burned again, and then enters the combustion chamber 11. It enters the waste heat boiler 12 for heat exchange utilization and is finally discharged after purification; the oxygen supply grid 4 in the material channel 3 supplements air so that part of the raw coal particles burns to supplement heat; the carbonized material obtained after the raw coal particles are carbonized enters the activation section 18 and collides and rolls with the parts of several gas channels 7 extending into the material channel 3, and water vapor and supplementary combustion air enter from the gas channel 7, contact and activate the rolling and falling carbonized material; the water gas and unreacted water vapor generated in the activation section 18 go upward along the material channel 3, contact with the carbonized material in countercurrent, enter the carbonization section 17, and are discharged from the precipitation gas channel 5 to the flue gas channel 2 for combustion; the activated material obtained after the carbonized material is activated enters the cooling section 19 and is cooled and discharged.

[0066] In summary, the one-step carbonization and activation coke oven of the embodiment of the present invention uses raw coal particles as raw materials, and realizes one-step carbonization and activation through a vertical coke oven, ensuring that the material is constantly turned and stirred during the falling process, improving the carbonization and activation effect and uniformity, reducing preparation time, increasing the output of the coke oven, and saving energy. Specifically, the carbonization section and the activation section falling channel are provided with a precipitation gas channel and a gas channel, which can make the material falling trajectory blocked by the precipitation gas channel and the gas channel extending out of the material channel, causing the material to tumble and fall in a zigzag shape, playing a role of mixing and stirring; the precipitation gas of the carbonization section and the water gas of the activation section both enter the flue through the carbonization section for combustion, and the flue gas enters the activation section downward from the carbonization section, utilizing the heat gradient and achieving a good heat exchange effect. In the coking system of the embodiment of the present invention, the water vapor is superheated after multi-stage heat exchange, and then contacts with the material for activation, the activation temperature is controllable, the reaction time is short, and the activation effect is good.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0069] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0070] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0071] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A one-step carbonization activation coke oven, characterized in that: Including furnace body; The furnace body is provided with a raw coal inlet at the top and an activated coke outlet at the bottom. A carbonization section, an activation section, and a cooling section are sequentially provided in the furnace body from top to bottom. The carbonization section, activation section, and cooling section are connected by a plurality of material channels and a plurality of flue gas channels arranged at intervals. The upper end of the material channel is connected to the raw coal inlet, and the lower end is connected to the activated coke outlet. The portion of the material channel located in the carbonization section is provided with a plurality of oxygen supply grids, and the portion of the material channel located in the activation section is provided with a plurality of gas channels. Two adjacent flue gas channels and the portion of the material channel located in the carbonization section are connected via a plurality of precipitated gas channels; the plurality of precipitated gas channels and the plurality of gas channels form a zigzag channel in the material channel; the portion of the flue gas channel located in the carbonization section and the portion of the activation section are both provided with a plurality of air grilles; It also includes a steam superheating pipeline, which is arranged in the activation section of the plurality of flue gas channels; one end of the steam superheating pipeline is connected to the plurality of gas channels, and the other end is connected to the activation gas source; In the carbonization section of each material channel, several oxygen supply grids are evenly arranged at a certain distance from top to bottom; in the carbonization section and activation section of the flue gas channel, several air grids are evenly arranged at a certain distance from top to bottom; Several precipitation gas channels and several gas channels are arranged in a staggered manner on both sides of the material channel; the precipitation gas channels and the gas channels are both inclined baffle structures arranged along the width direction of the furnace body, and these inclined baffle structures are all hollow structures.

2. The one-step carbonization activation coke oven according to claim 1, characterized in that: Several precipitation gas channels and several gas channels are divided into a first group and a second group, wherein the several precipitation gas channels and several gas channels in the first group are distributed from top to bottom on the first side of the material channel and inclined to the first direction, and the several precipitation gas channels and several gas channels in the second group are distributed from top to bottom on the second side of the material channel and inclined along the second direction, the first side and the second side are arranged relative to each other, and the first direction and the second direction are arranged relative to each other; the several precipitation gas channels in the first group and the several precipitation gas channels in the second group are arranged at intervals, and the several gas channels in the first group and the several gas channels in the second group are arranged at intervals.

3. The one-step carbonization activation coke oven according to claim 2, characterized in that: All the evolution gas channels and all the gas channels are evenly distributed.

4. The one-step carbonization activation coke oven according to claim 2, characterized in that: The plurality of separation gas channels in the first group and the plurality of gas channels in the first group are both arranged at 100-120° to the horizontal plane; the plurality of separation gas channels in the second group and the plurality of gas channels in the second group are both arranged at 60-80° to the horizontal plane.

5. The one-step carbonization activation coke oven according to claim 1, characterized in that: The horizontal distances of the precipitated gas channel and the gas channel extending into the material channel are both 20-60% of the material channel width.

6. The one-step carbonization activation coke oven according to claim 1, characterized in that: The material of the steam superheating pipeline is silicon carbide or high-temperature alloy; a plurality of furnace bricks are provided in the furnace body, and the plurality of furnace bricks divide the space in the furnace body into the material channel and the flue gas channel arranged at intervals; a first partition is sealed and installed at the connection between the upper end of the flue gas channel and the raw coal inlet, and a second partition is sealed and installed at the connection between the lower end and the activated coke outlet.

7. The one-step carbonization activation coke oven according to claim 1, characterized in that: It also includes a smoke outlet; the smoke outlet is arranged on the side wall of the furnace body, and the smoke outlet is located between the activation section and the cooling section; a cooling coil is arranged in the cooling section.

8. A coking system, characterized in that: It comprises a one-step carbonization activation coke oven, a combustion chamber and a waste heat boiler as described in any one of claims 1 to 7, which are connected in sequence; A first steam pipeline and a first air pipeline are provided in the combustion chamber; The outlet of the first steam pipeline is connected to a plurality of gas channels; the first outlet of the first air pipeline is connected to a plurality of oxygen supply grids and a plurality of air grids, and the second outlet of the first air pipeline is connected to a plurality of gas channels; The waste heat boiler is provided with a second steam pipeline and a second air pipeline; The outlet of the second steam pipeline is connected to the inlet of the first steam pipeline, and the outlet of the second air pipeline is connected to the inlet of the first air pipeline.

9. A method for preparing activated coke, applied to the coking system according to claim 8, characterized in that: include: Raw coal particles enter the material channel of the carbonization section and, in the process of falling by their own weight, collide with and tumble with the portions of several precipitation gas channels extending into the material channel, taking a zigzag route in the material channel. Volatile matter and tar precipitated during the carbonization process are initially burned in the material channel under the action of oxygen supplied by the oxygen supply grid, and then enter the flue gas channel through the precipitation gas channel. The air supplied by the air grid is further burned, and the flue gas passes through the activation section from top to bottom, enters the combustion chamber from the flue gas outlet, burns again, and then enters the waste heat boiler for heat exchange utilization. The oxygen supply grid in the material channel supplies air, so that the raw coal particles are partially burned to supplement heat. The carbonized material obtained after the raw coal particles are carbonized enters the activation section and collides with and rolls against the portions of the gas channels extending into the material channel. Water vapor and afterburning air enter from the gas channels and contact and activate the rolling and falling carbonized material. The water gas and unreacted water vapor generated in the activation section move upward along the material channel, come into countercurrent contact with the carbonized material, enter the carbonization section, and are discharged from the precipitated gas channel to the flue gas channel for combustion; The activated material obtained after the carbonized material is activated enters the cooling section and is cooled and then discharged.

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