Vertical coke oven and coke making system and method

Abstract

The application discloses a vertical coke making furnace, a coke making system and a coke making method. The vertical coke making furnace comprises a furnace body; a carbonization section and an activation section are sequentially arranged in the furnace body from top to bottom; the carbonization section and the activation section are communicated through a plurality of material channels; the area between the plurality of material channels and the side wall of the furnace body forms a flue; the plurality of material channels are arranged at intervals; a plurality of activation gas channels are arranged at intervals on the opposite side walls of the activation section from top to bottom; the activation gas channels on the two side walls of the same material channel are symmetrically arranged; the activation gas channels of adjacent two material channels are arranged at intervals from top to bottom; the top and the bottom of the flue are closed; and a first sealing section is arranged at the position of the flue between the carbonization section and the activation section. The vertical coke making furnace is a carbonization and activation integrated furnace, has a small equipment area, has a large output, and has the advantages of short activation time, small activation gas consumption, low energy consumption, good effect and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of material preparation, and particularly relates to a vertical coke oven and a coke preparation system and method. BACKGROUND

[0002] Coal is not only a fuel, but also a cheap and readily available raw material for preparing carbon materials. Currently, the active coke used for desulfurization and denitrification is prepared from coal. The existing carbonization and activation equipment for preparing active coke is a horizontal rotary furnace and a vertical Slep furnace.

[0003] The horizontal rotary furnace realizes material turnover by rotating the furnace body at a certain angle, thereby realizing material carbonization and activation with activator. However, the horizontal rotary furnace has problems such as large floor area, high investment cost, and low temperature control precision.

[0004] The material channel and flue of the vertical Slep furnace are staggered, the furnace body is arranged in a square shape, and the flue and the material channel are both thin-layer cuboid channels. The material channel has a small width, and the cross-sectional proportion of the refractory brick is large, resulting in a large furnace body size. The generation of activation steam in the vertical Slep furnace is realized by switching the left and right combustion chambers to generate heat storage bricks, and the process is complex, and the steam temperature is uncontrollable. The vertical Slep furnace cannot directly activate raw coal particles, and can only activate the material after carbonization. This is because a large amount of tar is precipitated during the heating process of raw coal particles, which is mixed with fine powder, resulting in problems such as coking and fouling of the furnace wall in the carbonization section, blockage of the gas channel, and material sticking together. After carbonization, the tar, volatile matter, and fine broken powder are less, and it is not easy to cause problems such as coking and fouling of the furnace wall, blockage of the gas channel, and material sticking together. Therefore, the vertical Slep furnace is only an activation furnace, and cannot be used as a carbonization and activation furnace for one-step coke making. The adaptability of the raw material is poor for fixed particles and specific operating parameters. SUMMARY

[0005] Therefore, one object of the present application is to provide a vertical coke oven, which is a carbonization and activation integrated furnace, has a small equipment floor area, a large output, and activation gas penetrating the activation material layer. The activation time is short, the activation gas consumption is small, the energy consumption is low, and the effect is good.

[0006] Another object of the present application is to provide a coke preparation system.

[0007] Still another object of the present application is to provide a preparation method of active coke.

[0008] To achieve the above object, the first aspect of the present application provides a vertical coke oven, comprising an oven body; a carbonization section and an activation section are sequentially arranged in the oven body from top to bottom; the carbonization section and the activation section are communicated through a plurality of material channels, and the area between the plurality of material channels and the side wall of the oven body constitutes a flue;

[0009] The plurality of material channels are arranged at intervals, and the portions of the activation section on the opposite two side walls of each of the plurality of material channels are arranged at intervals from top to bottom, and the activation gas channels on the two side walls of the same material channel are symmetrically arranged, and the activation gas channels of adjacent two material channels are arranged at intervals from top to bottom.

[0010] The top and bottom of the flue are closed, and the portion of the flue between the carbonization section and the activation section is provided with a first sealing section; the portion of the flue in the activation section is provided with a plurality of activation section air supplement openings, an activation gas inlet, an activation gas outlet and at least one layer of second sealing section; the second sealing section is located between the adjacent two activation gas channels of adjacent two material channels, and all the second sealing sections are located between the activation gas inlet and the activation gas outlet; a plurality of layers of the second sealing sections are arranged at intervals from top to bottom, and alternately seal the remaining parts of the flue except one side of the opposite two sides.

[0011] In some embodiments of the present application, the portion of each layer of the second sealing section on the upper side and the lower side of the opposite two side walls of the material channel is provided with one activation gas channel; the spacing between the activation gas channels of the adjacent two material channels is 5-10 times the width of the material channel.

[0012] In some embodiments of the present application, when the number of layers of the second sealing section is one, the second sealing section divides the flue in the activation section into a "U" shaped channel; when the number of layers of the second sealing section is more than two, a plurality of layers of the second sealing section divide the flue in the activation section into an "S" shaped channel.

[0013] In some embodiments of the present application, the portion of the plurality of material channels in the carbonization section is communicated with the portion of the flue in the carbonization section; the portion of the plurality of material channels in the carbonization section is provided with a carbonization section material channel air supplement opening; the portion of the flue in the carbonization section is provided with a carbonization section flue air supplement opening and a carbonization section flue gas outlet, and the carbonization section flue gas outlet is communicated with an induced draft fan.

[0014] In some embodiments of the present application, the carbonization section flue gas outlet, the activation gas inlet and the activation gas outlet are all arranged on the oven body, and the carbonization section flue gas outlet is located at the bottom of the carbonization section, the activation gas outlet is located at the upper end of the activation gas inlet, and the activation gas inlet is arranged at the bottom of the activation section.

[0015] In some embodiments of the present application, the first sealing section and the second sealing section are both closure bricks filled in the flue; the height of the first sealing section is 3-6 times of the width of the channel; the width of the channel is 50-150 mm.

[0016] In some embodiments of the present application, the part of the channel in the carbonization section is made of refractory bricks with through holes, and the part of the channel in the activation section is made of common refractory bricks; the through holes are arranged obliquely.

[0017] In some embodiments of the present application, the vertical coke oven further comprises a cooling section; the cooling section is arranged below the activation section in the oven body; the top of the channel is communicated with the feeding port of the oven body, and the bottom of the channel, the cooling section and the activated coke outlet of the oven body are communicated; the cooling section is provided with cooling pipes.

[0018] To achieve the above-mentioned purpose, the second aspect of the present application provides a coke making system, comprising a coke making oven and a waste heat boiler.

[0019] The coke making oven is the vertical coke oven provided in the embodiments of the present application.

[0020] The gas inlet of the waste heat boiler is communicated with the flue gas outlet of the carbonization section and the activation gas outlet, the gas outlet of the waste heat boiler is communicated with the induced draft fan and the chimney in sequence, the cold water inlet of the waste heat boiler is communicated with the water supply pump, and the water vapor outlet of the waste heat boiler is communicated with the activation gas inlet.

[0021] To achieve the above-mentioned purpose, the third aspect of the present application provides a preparation method of activated coke, comprising

[0022] The raw coal particles are carbonized under negative pressure in the carbonization section to obtain carbonized material, and the air supplement port of the channel in the carbonization section carries the pyrolysis gas and tar generated in the carbonization process into the flue in the carbonization section, which is preliminarily combusted by the air of the air supplement port of the flue in the carbonization section, and the generated flue gas enters the waste heat boiler from the flue gas outlet of the carbonization section;

[0023] The carbonized material enters the activation section to be activated by the activation gas to obtain activated material, and the water gas generated in the activation process enters the flue to be combusted by supplementing oxygen and to heat the unreacted water vapor, and then enters the waste heat boiler;

[0024] The activated material is discharged from the activated coke outlet of the oven body after being cooled and collected;

[0025] In some embodiments of the present application, the process of the activation gas alternately penetrating the carbonized material layer in the channel horizontally and the process of the water gas in the flue adjacent to the channel being combusted by supplementing oxygen and heating the unreacted water vapor are carried out until the activated material is discharged from the activation gas outlet along the gas flow path formed by the multiple second sealing sections in the activation section.

[0026] In some embodiments of the present application, the negative pressure condition is (-50) to (-150) Pa.

[0027] The vertical coke oven of the embodiments of the present application can bring the following beneficial effects:

[0028] (1) The carbonization and activation integrated furnace has a small equipment footprint and a large output.

[0029] The vertical coke oven of the embodiments of the present application has the carbonization section and the activation section arranged in the furnace body in a top-down manner and in communication with each other, so that the raw coal particles can pass through the carbonization and activation in one step to obtain the activated coke with developed pores. In addition, the combination of the carbonization and activation processes can effectively reduce the system footprint, and the carbonization and activation integrated furnace has a high coke production efficiency, a large output, and a low equipment investment cost.

[0030] (2) The activation gas penetrates the material layer, and the activation time is short and the effect is good.

[0031] The activation gas holes on the two side walls of the same material channel are symmetrically arranged, the activation gas enters from one side of the material channel and is discharged from the other side, the activation gas and the activated material layer (i.e., the carbonized material layer) in the material channel are penetrated and activated, the contact is more sufficient, and high-efficiency activation in a short time can be achieved.

[0032] (3) The activation gas consumption is small, and the energy consumption is low.

[0033] Since the multiple second sealing sections are located between the activation gas inlet and the activation gas outlet and are arranged in an up-down manner to alternately seal the remaining parts except one of the two opposite sides, and the activation gas holes on the two side walls of the same material channel are symmetrically arranged, the high-temperature activation gas of the activation section and the activated material layer (i.e., the carbonized material layer) in the material channel can be multi-layer and left-right penetrated and activated, the activation reaction is more sufficient, the utilization rate of the activation gas is high, the activation gas usage is only 10-20% of the amount of the activation gas used in the traditional Sprengel furnace, the coke production energy consumption is low, and the cost is low.

[0034] (4) The problem of tar plugging in the carbonization section is avoided.

[0035] The carbonization section flue gas outlet is communicated with the induced draft fan, and air supplement openings are arranged in the material channel and the flue of the carbonization section, so that the carbonization section can be operated in a negative pressure mode and in an air carrying mode, the generated tar is quickly discharged from the material layer of the carbonization section, air is supplemented in time for combustion after entering the flue, and the problems of coke and dirt deposition on the furnace wall, gas passage plugging, and material agglomeration are avoided.

[0036] The beneficial effects of the coke production system and the preparation method of the activated coke of the embodiments of the present application are basically the same as those of the vertical coke oven of the embodiments of the present application, and will not be repeated here.

[0037] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the attendant drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0039] Figure 1 is a simple structural schematic diagram of a vertical coke making furnace according to one embodiment of the present application.

[0040] Figure 2 is a simple structural schematic diagram of the cross section of carbonization section and activation section of a vertical coke making furnace filled with material according to one embodiment of the present application.

[0041] Figure 3 is a structural diagram of a refractory brick with a through hole in a vertical coke making furnace according to one embodiment of the present application.

[0042] Figure 4 is a structural diagram of a common refractory brick in a vertical coke making furnace according to one embodiment of the present application.

[0043] Figure 5 is a comparison diagram of contact activation and penetration activation principles, wherein (a) is the principle of traditional contact activation, and (b) is the principle of penetration activation of the present application.

[0044] Figure 6 is a simple structural schematic diagram of a coke making system according to one embodiment of the present application.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1 - furnace body; 2 - waste heat boiler; 3 - induced draft fan; 4 - feed water pump; 5 - carbonization section flue gas outlet; 6 - activation gas outlet; 7 - activation gas inlet; 8 - carbonization section material channel air supplement port; 9 - carbonization section flue air supplement port; 10 - through hole; 11 - material channel; 12 - flue; 13 - first sealing section; 14 - activation gas hole; 15 - activation section air supplement port; 16 - cooling pipe; 17 - feed inlet; 18 - active coke outlet; 19 - second sealing section; 20 - material; 100 - carbonization section; 200 - activation section; 300 - cooling section. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are examples and are intended to explain the present application, and should not be understood as limiting the present application.

[0048] The following description, in conjunction with the accompanying drawings, describes the vertical coking oven, coking system, and method for preparing activated coke according to embodiments of the present invention.

[0049] Figure 1 This is a simplified structural diagram of a vertical coking oven according to an embodiment of the present invention.

[0050] like Figure 1 As shown, the vertical coke oven of this embodiment includes a furnace body 1; a carbonization section 100 and an activation section 200 are arranged sequentially from top to bottom inside the furnace body 1; the carbonization section 100 and the activation section 200 are connected by a plurality of material channels 11, and the area between the plurality of material channels 11 and the side wall of the furnace body constitutes a flue 12; the plurality of material channels 11 are spaced apart, and a plurality of activation gas channels 14 are spaced apart from top to bottom on the two opposite side walls of the portion of the plurality of material channels 11 located in the activation section 200, and the activation gas channels 14 on the two side walls of the same material channel 11 are symmetrically arranged, and the activation gas channels 14 of two adjacent material channels 11 are spaced apart from top to bottom; flue 1 The flue 12 is enclosed at both the top and bottom. The part of the flue 12 between the carbonization section 100 and the activation section 200 is provided with a first sealing section 13. The part of the flue 12 in the activation section 200 is provided with several activation section air supply ports 15, activation gas inlets 7, activation gas outlets 6 and at least one layer of second sealing sections 19. The second sealing sections 19 are located between two adjacent activation gas channels 14 of two adjacent material channels 11, and all second sealing sections 19 are located between activation gas inlets 7 and activation gas outlets 6. The multiple layers of second sealing sections are arranged at intervals, alternately sealing the rest of the flue 12 except for one of the opposite sides.

[0051] It is understandable that the multi-layer second sealing section will divide the activation section into multiple penetrating activation layers through which activation gas flows back and forth from one side of the furnace to the other.

[0052] The vertical coking oven of this invention is an integrated carbonization and activation furnace. The equipment has a small footprint, high output, and the activation gas penetrates the activation material layer, resulting in short activation time, low activation gas consumption, low energy consumption, and good effect.

[0053] Specifically:

[0054] Because the carbonization and activation sections are interconnected from top to bottom in the furnace body, the raw coal particles can rely on their own weight to undergo carbonization and activation in one step to obtain activated coke with well-developed pores. In addition, the combination of the two-step carbonization and activation process can effectively reduce the system's footprint. The integrated carbonization and activation furnace has high coking efficiency, large output, and low equipment investment cost.

[0055] The activation gas holes on the two side walls of the same material channel are symmetrically arranged, the activation gas enters from one side of the material channel and is discharged from the other side, the activation gas is penetrated and activated with the activated material layer (i.e. the carbonized material layer) in the material channel, the contact is more sufficient, and high-efficiency activation in a short time can be realized.

[0056] Since the plurality of second sealing sections are located between the activation gas inlet and the activation gas outlet, and are arranged in an upper and lower interval, the flue is alternately sealed except one side of the opposite two sides, the activation gas holes on the two side walls of the same material channel are symmetrically arranged, the high-temperature activation gas of the activation section can be penetrated and activated with the activated material layer (i.e. the carbonized material layer) in the material channel in multiple layers and left and right, the activation reaction is more sufficient, the utilization rate of the activation gas is high, the use of the activation gas is only 10-20% of the amount of the activation gas of the traditional sintering furnace, the energy consumption for sintering is low, and the cost is low.

[0057] In the present application, the shape of the furnace body is not limited, and the main part provided with the carbonization section, the activation section and the like can be a cylinder, a cuboid, a square, a prism and the like. As a possible example, as shown in Figure 1 and Figure 2 , the main part of the furnace body is in the shape of a cuboid, the top is integrally formed or welded with a pyramid-shaped feeding port 17, and the bottom is integrally formed or welded with a pyramid-shaped active coke outlet 18 which is large at the top and small at the bottom.

[0058] In some embodiments of the present application, in order to cool the active coke obtained after activation, the furnace body of the vertical coke oven is further provided with a cooling section 300 below the activation section 200; the top of the material channel 11 is communicated with the feeding port 17 of the furnace body 1, and the bottom of the material channel 11, the cooling section 300 and the active coke outlet 18 of the furnace body 1 are communicated with each other; and the cooling section 300 is provided with a cooling pipe 16. The cooling pipe can be a cooling coil, and a cooling medium such as cold water is used for heat exchange with the active coke after activation, so that the active coke obtained after activation can be cooled to below 80℃ and discharged.

[0059] In the present application, in order to ensure that the material can enter the activation section from the carbonization section by gravity, and then enter the cooling section, the material channel is preferably in a regular shape, such as a cylindrical shape, a cuboid shape, a prism shape or a square shape, otherwise there may be a problem of poor discharging. As a possible example, the material channel is a cuboid passage surrounded by refractory bricks, and the width is between 50-150mm, preferably 80-120mm, and more preferably 100mm. A plurality of material channels are spaced apart from the inner wall of the furnace body, for example, with a spacing of 50-150mm; the part between the plurality of material channels and the furnace body and the part between the adjacent two material channels constitute a flue (as shown in Figure 2 ).

[0060] In some embodiments, each of the two opposite sidewalls of the channel 11 is provided with an activation gas hole 14 above and below each layer of the second sealing section 19, so that the activation gas from the activation gas inlet 7 can first enter the activation material layer (i.e. the carbonized material layer) in a channel through the activation gas hole oppositely arranged in the channel, and then enter the flue through the other activation gas hole after horizontally penetrating the activation material layer. The activation section is provided with an air supplement hole in the flue, and the water gas produced by the activation reaction is combusted to heat the incompletely reacted activation gas, which then flows upward / downward along the activation section flue to penetrate the activation material layer through the activation gas hole of the other channel, and then enters the other flue for oxygen supplement combustion, and then flows upward / downward again through the activation gas hole into the activation material layer. Such up-and-down flow can ensure that the water gas produced by the activation is combusted in time and heats the incompletely reacted activation gas, and can ensure that the activation gas has the shortest flow path under the premise of sufficient contact with the activation material layer, thereby reducing the amount of activation gas used.

[0061] As a possible example, in order to facilitate the combustion of the water gas produced by the activation and improve the combustion efficiency, the activation section air supplement hole 15 is located at the exhaust port of the activation gas hole 14 in the flue.

[0062] Optionally, the distance between the activation gas holes 14 of adjacent two channels 11 is 5-10 times, preferably 7 times or 8 times, the width of the channel 11. The distance between the activation gas holes 14 of adjacent two channels 11 cannot be too large or too small. If the distance is too large, the flow path of the activation gas is lengthened, which reduces the number of activation gas holes in the channel under the premise of a certain activation section height, thereby reducing the number of times the activation gas penetrates the material layer horizontally and reducing the activation efficiency. If the distance is too small, it is not conducive to the combustion of the water gas produced by the activation to heat the incompletely reacted activation gas, which reduces the activation temperature and further reduces the activation efficiency.

[0063] In some embodiments, when the number of layers of the second sealing section 19 is one, the second sealing section 19 divides the flue 12 in the activation section 200 into a "U"-shaped channel. In other embodiments, when the number of layers of the second sealing section 19 is two or more, the multiple layers of the second sealing section 19 divide the flue 12 in the activation section 200 into an "S"-shaped channel. Here, the "U"-shaped channel and the "S"-shaped channel refer to the overall flow path of the activation gas in the flue formed by the second sealing sections, rather than the flow path between adjacent two flues.

[0064] In some embodiments, the portions of the carbonization section 100 where the channels 11 are located are in communication with the portions of the flue 12 located in the carbonization section 100, and the communication manner is not limited, which can be a hole opened in the side wall adjacent to the channel and the flue, or the channel wall is made of porous material. As a possible example, the portions of the carbonization section 100 where the channels 11 are located are made of refractory bricks with through holes 10, and the through holes 10 are inclined (as shown in Figure 3 FIG. 2), wherein the refractory bricks can be corundum refractory bricks or silicon carbide refractory bricks, etc.

[0065] In some embodiments, the portions of the carbonization section 100 where the channels 11 are located are provided with carbonization section channel air supplement openings 8; the portions of the flue 12 located in the carbonization section 100 are provided with carbonization section flue air supplement openings 9 and carbonization section flue gas outlets 5, and the carbonization section flue gas outlets 5 are in communication with the induced draft fan 3. During the gradual heating of the carbonization section material, a large amount of tar is precipitated, and the carbonization section flue gas outlet is in communication with the induced draft fan, which can make the carbonization section operate under negative pressure, and the generated volatile and tar can be carried by air and discharged from the carbonization section material layer in time, and rapidly burned in the flue, thereby avoiding the problem of tar condensation and blockage.

[0066] As a possible example, in order to discharge the gas to the flue for combustion, the through holes 10 and the activation gas channels 14 are both inclined downward from the outside of the channel to the inside of the channel.

[0067] In the present application, the carbonization section flue gas outlet 5, the activation gas inlet 7 and the activation gas outlet 6 are all arranged on the furnace body 1. The position of the carbonization section flue gas outlet 5 is not limited, which can be arranged at the top, middle or bottom of the carbonization section; in order to ensure that the activation gas has the largest possible contact area with the material in the channel, the activation gas inlet 7 can be arranged at the bottom of the activation section, and in order to avoid the mixing of the activation gas inlet and the activated water gas, it is better to leave a distance between the activation gas inlet and the activation gas outlet, such as arranging the activation gas outlet and the activation gas inlet on different sides of the furnace body, and / or arranging the activation gas outlet above the activation gas inlet. As a possible example, the carbonization section flue gas outlet 5 is arranged at the bottom of the carbonization section, the activation gas inlet 7 is arranged at the bottom of the activation section, and the activation gas outlet 6 is arranged at the top of the activation section.

[0068] In some embodiments, the portions of the channel 11 located in the activation section 200 are made of ordinary refractory bricks, and the structure of the ordinary refractory bricks is as shown in Figure 4As shown. The first sealing section 13 and the second sealing section 19 are both sealed bricks filled in the flue 12. Here, the sealed bricks refer to heat-resistant solid bricks, such as solid corundum refractory bricks or silicon carbide refractory bricks, etc. The height of the first sealing section 13 is 3-6 times the width of the material channel 11, preferably 3.5 times. The height of the second sealing section 19 is less than the distance between two adjacent activated gas channels of two adjacent material channels. For example, the height of the second sealing section 19 is 1 / 2-3 / 4 of the distance between two adjacent activated gas channels of two adjacent material channels, preferably 5 / 8.

[0069] It should be noted that the implementation methods for the air supply port 8 in the carbonization section, the air supply port 9 in the carbonization section flue, and the air supply port 15 in the activation section are not limited. For example, the air supply port 8 in the carbonization section, the air supply port 9 in the carbonization section flue, and the air supply port 15 in the activation section can all be jet pipelines extending from the outside of the furnace body through the side wall of the furnace body into the corresponding parts of the furnace body, or they can all be jet ports installed at the corresponding parts of the side wall of the furnace body that can connect to the external air source of the furnace body. The above implementation methods are all existing technologies and will not be described in detail here.

[0070] Taking the case where the activating gas is high-temperature steam as an example, the operation method of the vertical coke oven in this embodiment of the invention is as follows:

[0071] like Figure 1 As shown, raw coal particles pass through the carbonization section 100, activation section 200 and cooling section 300 of the furnace body 1 from top to bottom, and the finished activated coke is discharged from the bottom of the furnace body 1. The air supply port 8 of the carbonization section carries the pyrolysis gas and tar from the carbonization process and enters the flue 12 of the carbonization section through the through hole 10. It is initially burned by the air supply port 9 of the carbonization section flue, and the generated flue gas is discharged from the bottom of the carbonization section flue gas outlet 5 from top to bottom.

[0072] High-temperature steam enters through the activation gas inlet 7 at the bottom of the activation section 200, first passing through the activation gas channel 14 into the material channel 11, and horizontally penetrating the activation material layer (i.e., the carbonized material layer) within the material channel 11 for activation (e.g., ...). Figure 5 After (b) shown, it enters the flue 12 through the activation gas channel 14 on the other side. The activation section air supply port 15 is set in the flue 12. The water gas generated by the activation reaction is burned to heat the water vapor that has not been fully reacted. Then it goes up along the flue 12 of the activation section and penetrates the activation material layer in the material channel through the activation gas channel 14 for activation. Then it enters another flue 12 to supplement oxygen for combustion. It goes down and starts to enter the activation material layer through the activation gas channel 14 again. This up-and-down flow penetrates the activation material layer for activation. When it reaches the other side of the activation gas inlet 7 of the furnace body, the activation gas and the continuously generated flue gas go up into the second penetrating activation layer. Then it is circulated for penetrating activation and air supplementation for heating. It is discharged from the activation gas outlet 6 at the top of the activation section.

[0073] During the whole operation process of the vertical coke oven, the induced draft fan 3 is used to control the pressure of the carbonization section of the vertical coke oven to maintain a pressure of (-50) to (-150) Pa.

[0074] As shown in Figure 6 the coke making system of the embodiment of the present application comprises a coke oven and a waste heat boiler 2; the coke oven is the vertical coke oven of the embodiment of the present application; the gas inlet of the waste heat boiler 2 is communicated with the flue gas outlet 5 of the carbonization section and the activation gas outlet 6; the gas outlet of the waste heat boiler 2 is communicated with the induced draft fan 3 and the chimney in sequence; the cold water inlet of the waste heat boiler 2 is communicated with the water supply pump 4; and the water vapor outlet of the waste heat boiler 2 is communicated with the activation gas inlet 7.

[0075] It should be noted that the waste heat boiler 2 can be provided with one or two gas inlets. When the waste heat boiler 2 is provided with one gas inlet, the gas inlet can be communicated with the flue gas outlet 5 of the carbonization section and the activation gas outlet 6 through a tee joint, a first pipeline and a second pipeline; when the waste heat boiler 2 is provided with two gas inlets, the two gas inlets can be communicated with the flue gas outlet 5 of the carbonization section and the activation gas outlet 6 through the first pipeline and the second pipeline respectively.

[0076] The waste heat boiler 2, the induced draft fan 3, the chimney, the water supply pump 4 and the activation gas inlet 7 can be communicated through corresponding pipelines.

[0077] In the present application, valves can be installed on the pipelines as needed to control the movement of materials through the pipelines.

[0078] The preparation method of the activated coke of the embodiment of the present application (i.e. the operation method of the coke making system of the embodiment of the present application) comprises the following steps:

[0079] The raw coal particles are carbonized under negative pressure in the carbonization section to obtain carbonized material, and at the same time, the air supplement port 8 of the carbonization section carries pyrolysis gas and tar generated in the carbonization process into the flue of the carbonization section, and the air of the air supplement port 9 of the flue of the carbonization section is preliminarily combusted, and the generated flue gas enters the waste heat boiler 2 from the flue gas outlet 5 of the carbonization section;

[0080] The carbonized material enters the activation section to be activated with activation gas to obtain activated material, and the water gas generated in the activation is supplemented with oxygen and combusted in the flue to heat the unreacted water vapor, and then enters the waste heat boiler 2;

[0081] The activated material is cooled and discharged from the activated coke outlet 18 of the furnace body 1 for collection.

[0082] In some embodiments, the process of activating gas alternately penetrating the carbonized material layer in the horizontal channel and the process of water gas combustion in the flue immediately adjacent to the channel and heating the unreacted steam are carried out until the gas flow path formed along the multi-layer second sealing section in the activation section is discharged from the activation gas outlet.

[0083] Specifically, the high-temperature steam generated by the waste heat boiler 2 enters through the activation gas inlet 7 at the bottom of the activation section 200, first enters the first flue 12 immediately adjacent to the activation gas inlet 7, and then enters the first channel 11 immediately adjacent to the activation gas inlet 7 through the activation gas hole 14. After the activation of the activation material layer (i.e., the carbonized material layer) in the first channel 11 (as shown in (b) of FIG. 8), the activation gas enters the second flue 12 immediately adjacent to the activation gas inlet 7 through the other side of the activation gas hole 14. The second flue 12 is provided with an air supplement port 15 of the activation section. The water gas generated by the activation reaction is combusted to heat the unreacted steam, and then flows upward along the second flue 12 of the activation section. The activation material layer (i.e., the carbonized material layer) in the second channel immediately adjacent to the activation gas inlet 7 is penetrated by the activation gas hole 14, and then enters the third flue 12 immediately adjacent to the activation gas inlet 7 for oxygen combustion. The activation gas and the continuously generated flue gas flow upward into the second layer of the penetration activation layer, and the process of penetration activation and air combustion heating is repeated. The activation gas is discharged from the activation gas outlet 6 at the top of the activation section. Figure 5

[0084] In some embodiments, the entire process is controlled by the induced draft fan 3 to maintain the pressure of the carbonization section of the vertical coke oven at (-50) to (-150) Pa. As a possible example, the carbonization section of the vertical coke oven is controlled by the induced draft fan 3 to maintain the pressure at (-80) to (-120) Pa, and the operating pressure is preferably -100 Pa.

[0085] In some embodiments, the activated material is cooled to below 80°C in the cooling section through the cooling pipe, and the product activated coke is obtained.

[0086] ​In summary, the present application aims at the problems existing in the prior coke oven, i.e., (1) the tar and fine powder mixed in the process of the gradual temperature rise of the raw coal particles in the carbonization section, resulting in the coking and fouling of the furnace wall of the carbonization section, the blockage of the gas passage, the sticking of the material into a group, etc., and (2) the problem of whether the activation gas and the active coke are fully contacted, and proposes a vertical coke oven and a coke making system and method, which significantly reduces the risk of the coking and fouling of the tar and fine powder by setting the carbonization section to run under negative pressure, and the coke oven and the coke making system and method significantly improve the quality of the active coke, reduce the energy consumption of coke making, and improve the activation effect and shorten the activation time.

[0087] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0088] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0089] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0090] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0091] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material or characteristic is included in at least one embodiment or example of the present application. Exemplary representations of the above terms in the specification are not necessarily directed to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the specification and features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0092] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A vertical coking oven, characterized in that, It includes a furnace body; the furnace body is provided with a carbonization section and an activation section from top to bottom; the carbonization section and the activation section are connected by several material channels, and the area between the material channels and the side wall of the furnace body constitutes a flue. Several material channels are spaced apart. On the two opposite side walls of the material channels located in the activation section, several activation gas channels are spaced apart from top to bottom. The activation gas channels on the two side walls of the same material channel are symmetrically arranged. The activation gas channels of two adjacent material channels are spaced apart from top to bottom. The flue is enclosed at both the top and bottom. A first sealing section is provided in the part of the flue between the carbonization section and the activation section. The part of the flue in the activation section is provided with several activation section air supply ports, activation gas inlets, activation gas outlets, and multiple layers of second sealing sections. The second sealing sections are located between two adjacent activation gas channels of two adjacent material channels, and all second sealing sections are located between the activation gas inlet and the activation gas outlet. The multiple layers of second sealing sections are arranged vertically at intervals, alternately sealing the rest of the flue except for one of the opposite sides. On each of the two opposite sidewalls of the material channel, one activation gas channel is provided on the upper and lower sides of the second sealing section of each layer; the spacing between the activation gas channels of two adjacent material channels is 5-10 times the width of the material channel; A portion of several material channels located in the carbonization section is connected to a portion of the flue located in the carbonization section; the portion of several material channels located in the carbonization section is provided with a carbonization section material channel air supply port; the portion of the flue located in the carbonization section is provided with a carbonization section flue air supply port and a carbonization section flue gas outlet, and the carbonization section flue gas outlet is connected to an induced draft fan.

2. The vertical coking oven according to claim 1, characterized in that, The multi-layered second sealing section divides the flue located in the activation section into an "S"-shaped channel.

3. The vertical coking oven according to claim 1, characterized in that, The carbonization section flue gas outlet, activation gas inlet, and activation gas outlet are all located on the furnace body. The carbonization section flue gas outlet is located at the bottom of the carbonization section, the activation gas outlet is located above the activation gas inlet, and the activation gas inlet is located at the bottom of the activation section.

4. The vertical coking oven according to claim 1, characterized in that, Both the first sealing section and the second sealing section are sealed bricks filled in the flue; the height of the first sealing section is 3-6 times the width of the material channel; the width of the material channel is 50-150mm.

5. The vertical coking oven according to claim 1, characterized in that, The portion of the feed channel located in the carbonization section is made of refractory brick with through holes, while the portion of the feed channel located in the activation section is made of ordinary refractory brick; the through holes are inclined.

6. The vertical coking oven according to any one of claims 1 to 5, characterized in that, It also includes a cooling section; the cooling section is located below the activation section inside the furnace body; the top of the material channel is connected to the feed inlet of the furnace body, and the bottom of the material channel, the cooling section, and the activated coke outlet of the furnace body are connected; the cooling section is equipped with a cooling pipe.

7. A coking system, characterized in that, Including coke ovens and waste heat boilers; The coking oven is a vertical coking oven as described in any one of claims 1 to 6; The air inlet of the waste heat boiler is connected to the flue gas outlet of the carbonization section and the activation gas outlet. The exhaust port of the waste heat boiler is connected in sequence to the induced draft fan and the chimney. The cold water inlet of the waste heat boiler is connected to the feed water pump. The steam outlet of the waste heat boiler is connected to the activation gas inlet.

8. A method for preparing activated coke using the coking system of claim 7, characterized in that, include While the raw coal particles are carbonized under negative pressure in the carbonization section to obtain carbonized material, the air supply port of the carbonization section carries the pyrolysis gas and tar generated during the carbonization process into the flue of the carbonization section. They are initially burned by the air supply port of the flue of the carbonization section, and the resulting flue gas enters the waste heat boiler from the flue gas outlet of the carbonization section. The carbonized material enters the activation section and is activated by contact with the activation gas to obtain activated material. The water gas generated during activation enters the flue to supplement oxygen and burn, and heats the unreacted water vapor, which then enters the waste heat boiler. After being cooled, the activated material is discharged and collected from the activated coke outlet of the furnace body.

9. The method according to claim 8, characterized in that, The process of the activating gas alternately penetrating the carbonized material layer in the material channel horizontally and the process of water gas supplementing oxygen and burning in the flue adjacent to the material channel and heating the unreacted water vapor, until it is discharged from the activating gas outlet along the gas flow path formed in the activation section of the multi-layer second sealing section.

10. The method according to claim 8, characterized in that, The negative pressure condition is (-50) - (-150) Pa.

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