CN117383562B - Flue gas recirculation coke making system and method - Google Patents
Flue gas recirculation coke making system and method Download PDFInfo
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- CN117383562B CN117383562B CN202311659933.7A CN202311659933A CN117383562B CN 117383562 B CN117383562 B CN 117383562B CN 202311659933 A CN202311659933 A CN 202311659933A CN 117383562 B CN117383562 B CN 117383562B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000003546 flue gas Substances 0.000 title claims abstract description 108
- 239000000571 coke Substances 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title abstract description 11
- 230000004913 activation Effects 0.000 claims abstract description 64
- 238000012216 screening Methods 0.000 claims abstract description 40
- 238000003763 carbonization Methods 0.000 claims abstract description 35
- 230000001502 supplementing effect Effects 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 23
- 238000011084 recovery Methods 0.000 claims description 18
- 239000002912 waste gas Substances 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004939 coking Methods 0.000 claims 5
- 239000000047 product Substances 0.000 description 51
- 238000003490 calendering Methods 0.000 description 33
- 238000001816 cooling Methods 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000003213 activating effect Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000013590 bulk material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/39—Apparatus for the preparation thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/36—Reactivation or regeneration
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The application discloses a flue gas recirculation coke making system and a method, which relate to the technical field of manufacturing processes, and the flue gas recirculation coke making system comprises a coke making furnace, a flue gas recirculation assembly, a steam supplementing assembly and an exhaust gas incinerator, wherein the flue gas recirculation assembly and the steam supplementing assembly are communicated with the coke making furnace; the coke making furnace comprises a carbonization furnace section, a screening furnace section and an activation furnace section which are communicated with each other, wherein the screening furnace section is positioned between the carbonization furnace section and the activation furnace section, a screening assembly is arranged in the screening furnace section, the screening assembly comprises a primary screen plate and a secondary screen plate which are arranged in the screening furnace section at intervals, and the primary screen plate is arranged in the coke making furnace in a sliding manner along the vertical direction; one side of the primary screen plate is provided with a crushing assembly for crushing carbonized products, and a grinder for grinding the carbonized products is arranged between the primary screen plate and the secondary screen plate. The method can improve the quality of the finished active coke.
Description
Technical Field
The application relates to the technical field of manufacturing processes, in particular to a flue gas recirculation coke making system and method.
Background
The activated coke is a carbon material product with adsorption and catalytic properties, has the characteristics of activated carbon, such as larger specific surface area, stable chemical property, regeneration and recycling, overcomes the defects of high price, low mechanical strength, wear resistance and easy dust generation of the activated carbon, and has more practical significance in the field of atmospheric pollution control and environmental water control when the activated carbon is replaced by the activated coke.
The operation principle of the Siipu activation furnace is based on two main steps of carbonization and activation. And (3) carbonizing the materials in a carbonization section of the Sieve activation furnace to obtain carbonized products such as carbon black, coal coke and the like, and transmitting the carbonized products to the activation furnace section by a conveying device to heat and activate the carbonized products under the condition of limited oxygen regulation to form active coke. The activation is an important link in the production process of active coke products, and is also a second heat treatment process in the production process of active coke, and the main purpose of the activation is to enable the active coke to form a larger specific surface area and a developing pore structure, so that the active coke has stronger adsorption performance. This procedure determines the properties of the final active coke product.
The non-uniform particle size of carbonized products generated by the activation furnace in the related technology can influence the subsequent activation effect, so that the quality and performance of the finished active coke are reduced.
Disclosure of Invention
In order to improve the quality of finished active coke, the application provides a flue gas recirculation coke making system and method.
In one aspect, the present application provides a flue gas recirculation coke making system, which adopts the following technical scheme:
a flue gas recirculation coke making system, which comprises a coke making furnace, a flue gas recirculation assembly, a steam supplementing assembly and an exhaust gas incinerator, wherein the flue gas recirculation assembly is communicated with the coke making furnace;
the coke oven comprises a carbonization oven section, a screening oven section and an activation oven section which are communicated with each other, wherein the screening oven section is positioned between the carbonization oven section and the activation oven section, a screening assembly is arranged in the screening oven section, the screening assembly comprises a primary screen plate and a secondary screen plate which are arranged in the screening oven section at intervals, and the primary screen plate is arranged in the coke oven in a sliding manner along the vertical direction;
one side of the primary screen plate is provided with a crushing assembly for crushing carbonized products, and a grinder for grinding the carbonized products is arranged between the primary screen plate and the secondary screen plate.
By adopting the technical scheme, the flue gas recirculation assembly conveys the flue gas generated by combustion in the coke oven back into the coke oven so as to reduce the oxygen concentration in the mixed gas in the coke oven, play a role in heat absorption, and prevent the combustion temperature from becoming too high, thereby inhibiting the generation of nitrogen oxides; the steam supplementing component supplements steam in the coke making furnace in opposite directions so as to supply the activating reaction in the activating furnace section, and part of the heat exchanged flue gas enters the waste gas incinerator and is discharged outside after being treated by the waste gas incinerator.
The screening furnace section is arranged between the carbonization furnace section and the activation furnace section, so that when the carbonized product obtained by combustion in the carbonization furnace section passes through the screening furnace section and is classified by the primary screen plate and the secondary screen plate, the carbonized product positioned on the primary screen plate is crushed by the crushing assembly, and the carbonized product between the primary screen plate and the secondary screen plate is ground by the grinder, so that the particle uniformity of the carbonized product is improved while the size of the carbonized product is reduced, and the carbonized product is uniformly contacted with the activation gas, so that the activation effect is enhanced.
Optionally, the shredding assembly comprises a torrent nozzle and a transfusion tube communicated with the torrent nozzle, and the transfusion tube is connected with a first driving source for transporting liquid; the torrent shower nozzles are obliquely arranged towards the direction close to the primary screen plate, and a plurality of torrent shower nozzles are distributed at intervals along the vertical direction.
By adopting the technical scheme, the first driving source conveys water in the coke oven to the torrent nozzle through the infusion tube, and the water is sprayed out of the torrent nozzle to form high-pressure torrent to be sprayed onto the carbonized product on the first-stage sieve plate so as to break up the large-particle carbonized product; the torrent spray heads are obliquely arranged, and a plurality of the torrent spray heads are distributed at intervals along the vertical direction so as to enlarge the irradiation range of the crushing assembly.
Optionally, the grinder including rotate set up in divide the calendering jar in the sieve stove section with set up in the calendering ball in the calendering jar, offered the feed inlet on the calendering jar lateral wall, be provided with outside the coke oven and be used for driving the pivoted second actuating source of calendering jar.
Through adopting above-mentioned technical scheme, the carbomorphism material that falls from the one-level sieve can get into the calendering jar in the feed inlet of calendering jar, and when the calendering jar rotated, the calendering ball and the carbomorphism product in the calendering jar rotated along with the calendering jar, and the calendering ball and the carbomorphism product are rubbed each other in the calendering jar and are smashed the carbomorphism product to reach the purpose of grinding.
Optionally, be provided with on the calendering jar and be used for the drive one-level sieve gliding driving piece, offer on the branch sieve stove section inside wall confession one-level sieve gliding spout, spout inside wall with be provided with elastic buffer spare between the one-level sieve.
By adopting the technical scheme, the sliding groove is formed to provide a guiding function for the sliding of the primary screen plate, and when the calendaring tank rotates, the driving piece on the calendaring tank can drive the primary screen plate to move in the direction away from the secondary screen plate; the primary screen plate moves in a certain reciprocating manner along the vertical direction under the action of the elastic buffer piece, so that carbonized products on the primary screen plate move, and the crushing assembly is convenient for fully crushing the carbonized products.
Optionally, the flue gas recirculation assembly comprises a flue gas recirculation pipeline and a third driving source arranged on the flue gas recirculation pipeline, and the third driving source is used for driving the flue gas at the carbonization furnace section to move into the flue gas recirculation pipeline;
the flue gas recycling pipeline comprises a flue gas recycling pipe and a flue gas shunt pipe which are communicated with each other, and the flue gas recycling pipe is communicated with the carbonization furnace section and the waste gas incinerator;
the flue gas shunt tubes interval is provided with a plurality of, just the flue gas shunt tubes keep away from flue gas recovery tube's one end with the activation stove section is linked together.
Through adopting above-mentioned technical scheme, the flue gas of third actuating source drive retort section department removes to the flue gas recirculation pipeline in, and a portion flue gas flows into the waste gas incinerator along the flue gas recovery pipe and handles the back and discharge, and a portion flue gas flows into the activation stove section along the smoke ware shunt tubes to reduce the oxygen content of activation stove section department, help the going on of activation reaction.
Optionally, the steam supplementing assembly comprises a steam supplementing chamber and a steam conveying pipe group communicated with the steam supplementing chamber, and the steam conveying pipe group is communicated with the activating furnace section;
the flue gas recovery pipe comprises auxiliary heat pipe sections penetrating through the steam supplementing chamber, and the auxiliary heat pipe sections are spirally distributed.
By adopting the technical scheme, the steam supplementing chamber is used for generating steam, the steam transportation pipe group is used for transporting the steam generated in the steam supplementing chamber into the activation furnace, activating gas is supplied for the activation furnace, and the auxiliary heat pipe section in the flue gas recovery pipe is used for exchanging heat in the steam supplementing chamber so as to heat water in the steam supplementing chamber and realize heat recovery; the auxiliary heat pipe sections are spirally distributed in the steam supplementing chamber, so that the steam supplementing chamber is convenient to uniformly heat.
Optionally, the steam transportation nest of tubes includes first gas-supply pipe and the second gas-supply pipe that the interval set up, first gas-supply pipe with the second gas-supply pipe all with the activation stove section is linked together.
Through adopting above-mentioned technical scheme, first gas-supply pipe and second gas-supply pipe interval setting, and be linked together with the activation stove section for the steam of activation stove section department can evenly distributed, improves the activation effect.
Optionally, the coke making furnace is further communicated with an air combustion-supporting pipeline, one end of the air combustion-supporting pipeline is provided with a fourth driving source for transporting gas, and the other end of the air combustion-supporting pipeline is communicated with the flue gas shunt pipe far away from the activation furnace section.
Through adopting above-mentioned technical scheme, the fourth actuating source will make the outer air transportation of coke oven to the air in the combustion-supporting pipeline of air, in the combustion-supporting pipeline of air transported to flue gas reposition of redundant personnel pipeline for air mixes with the flue gas in the flue gas reposition of redundant personnel pipeline, directly reduces the oxygen content in the air and obtains low oxygen content gas mixture, and the low oxygen content gas mixture who obtains carries out in the activation stove section along flue gas shunt tubes, in order to ensure the low oxygen environment in the activation stove section, helps the going on of activation reaction.
Optionally, an extension pipe section is communicated with the second air pipe, and the extension pipe section is positioned in the activation furnace section;
the extension pipe section is located one side of the flue gas shunt pipe, which is far away from the screening furnace section, and a plurality of air nozzles are arranged on the extension pipe section at intervals.
By adopting the technical scheme, a plurality of air nozzles are arranged on the extension pipe section at intervals, steam is discharged from the air nozzles on the extension pipe section, and high-temperature air flow is formed in the activation section. Because the temperature of steam used in the preparation process of the active coke is higher than that of flue gas, high-temperature air flow formed by the steam can push the low-oxygen-content gas mixture in the activation furnace section to move towards the direction close to the carbonization furnace section in the ascending process, and because oxygen in the low-oxygen-content gas mixture is further consumed in the activation reaction of the activation furnace section, the oxygen content in the low-oxygen-content gas mixture entering the carbonization furnace section is further reduced, thereby being beneficial to forming an anoxic environment in the carbonization furnace section and facilitating the pyrolysis of materials in the carbonization furnace section. In addition, in the process of pushing the smoke to rise by the steam, the low-oxygen-content gas mixture fully contacts with carbonized products in the activation section, so that the activation efficiency is improved.
In another aspect, the present application provides a method of preparing activated coke by employing a flue gas recirculation coke making system of any one of the above.
By adopting the technical scheme, the carbonized product fully contacts and reacts with the activating gas in the activating furnace section, so that the activating efficiency is improved, and the quality of the finished active coke is obviously improved.
In summary, the present application includes at least one of the following beneficial effects:
1. a screening furnace section is arranged between the carbonization furnace section and the activation furnace section, and carbonized products generated in the carbonization furnace section are screened by a first-stage screen plate and a second-stage screen plate when passing through the screening furnace section, the carbonized products are crushed by a crushing assembly above the first-stage screen plate, and the carbonized products between the first-stage screen plate and the second-stage screen plate are ground by a grinder to reduce the size of the carbonized products, improve the uniformity of the carbonized products, and facilitate uniform contact between the carbonized products and activation gas in the furnace so as to enhance the activation effect;
2. the driving piece is arranged on the calendaring tank, when the calendaring tank rotates to grind and crush carbonized products in the calendaring tank, the driving piece can drive the first-stage sieve plate to vertically move upwards, and the first-stage sieve plate vibrates under the combined action of the driving piece and the elastic buffer piece, so that the carbonized products on the first-stage sieve plate shift, and the crushing assembly is facilitated to fully crush the carbonized products;
3. the flue gas recovery pipe comprises an auxiliary heat pipe section positioned in the steam supplementing chamber, and flue gas flows through the auxiliary heat pipe section along the auxiliary heat pipe section to heat water in the steam supplementing chamber so as to improve the energy utilization rate;
4. the air combustion-supporting pipeline in this application is directly linked together in the flue gas shunt tubes, and air and flue gas mix with flue gas again the flue gas shunt tubes, form in the low oxygen content gaseous mixture gets into the activation stove section to guarantee the low oxygen environment in the activation stove section.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application in elevation;
FIG. 2 is a schematic cross-sectional view of an embodiment of the present application;
FIG. 3 is a schematic view of a pressure grinder structure according to an embodiment of the present application;
fig. 4 is a schematic view of an isometric overall structure of an embodiment of the present application.
Reference numerals illustrate: 1. a coke oven; 11. a carbonization furnace section; 12. screening the furnace sections; 121. a chute; 13. an activation oven section; 14. cooling the furnace section; 141. a discharge pipe; 142. a discharge valve; 15. a feed hopper; 16. bulk bins; 161. a discharge hole; 17. a blanking plate; 171. a bulk material port; 2. a flue gas recirculation assembly; 21. a flue gas recirculation duct; 211. a flue gas recovery tube; 2111. a flue gas treatment tube; 212. a flue gas shunt tube; 22. a third driving source; 3. a steam supplementing assembly; 31. a steam supplementing chamber; 32. a steam transport tube group; 321. a first gas pipe; 322. a second gas pipe; 3221. extending the pipe section; 3222. an air nozzle; 33. a steam heat pipe; 4. an exhaust gas incinerator; 5. a screening assembly; 51. a first-stage sieve plate; 52. a second-stage screen plate; 521. avoidance holes; 53. a shredding assembly; 531. a torrent nozzle; 532. an infusion tube; 533. a first driving source; 54. a grinder; 541. a calendaring tank; 5411. a feed inlet; 542. rolling the ball; 55. a second driving source; 56. a driving member; 6. an elastic buffer member; 7. an air combustion-supporting pipeline; 71. a fourth driving source; 8. and (5) cooling the pipeline.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a flue gas recirculation system of making coke, referring to fig. 1 and 2, a flue gas recirculation system of making coke includes cylindric coke oven 1 of cavity, and coke oven 1 is along last to including the retort section 11, the branch sieve stove section 12, the activation stove section 13 and the cooling stove section 14 of intercommunication each other in proper order down. One end of the carbonization furnace section 11 is provided with a feed hopper 15, and the inner diameter of the feed hopper 15 is gradually reduced towards one end close to the carbonization section. The feeding hopper 15 is provided with a feeding pipe integrally, and one end of the feeding pipe, which is far away from the feeding hopper 15, is fixed on the coke oven 1 and is communicated with the carbonization furnace section 11. The feeding valve is arranged on the feeding pipe to control the opening and closing of the feeding pipe.
In order that the material at the feeding pipe can be uniformly discharged into the carbonization furnace section 11, a bulk material box 16 is fixed at one end of the carbonization furnace section 11 close to the feeding hopper 15, the end face of the bulk material box 16 close to the feeding hopper 15 is provided with an opening, the bottom wall of the bulk material box 16 is provided with a plurality of discharge holes 161 at intervals, and in the embodiment, the discharge holes 161 are provided with long strips.
Referring to fig. 1 and 2, a blanking plate 17 and a screening assembly 5 are disposed within the screening furnace section 12. The blanking plate 17 is located on one side of the sub-screen assembly 5 close to the carbonization furnace section 11, the blanking plate 17 is specifically arranged to be in an arc plate shape recessed towards the position close to the sub-screen assembly 5, and a bulk cargo opening 171 is formed in the blanking plate 17 for discharging carbonized products. The blanking plate 17 is provided to slow down the discharge rate of the carbonized product. The screening assembly 5 comprises a primary screening plate 51 and a secondary screening plate 52 which are arranged at intervals, and the primary screening plate 51 and the secondary screening plate 52 are both arranged in a disc shape. The first-stage screen plate 51 is slidably arranged in the screening furnace section 12, a sliding groove 121 for sliding the first-stage screen plate 51 is formed in the inner side wall of the screening furnace section 12, and the outer side wall of the second-stage screen plate 52 is welded and fixed on the inner side wall of the screening furnace section 12. In this embodiment, the mesh aperture of the primary screen plate 51 is larger than the aperture of the secondary screen plate 52. The carbonized products fall from the bulk ports 171 of the blanking plate 17 onto the primary screen plate 51 and the secondary screen plate 52 in order, so that the carbonized products are layered in the classifying furnace section 12 according to the size.
Referring to fig. 2, a shredding assembly 53 is disposed on a side of the primary screen plate 51 away from the secondary screen plate 52, the shredding assembly 53 includes a plurality of torrent shower nozzle groups penetrating through the screen separation section 12, each of the torrent shower nozzle groups includes a plurality of torrent shower nozzles 531 disposed at intervals along a vertical direction, and the torrent shower nozzles 531 are disposed obliquely toward a direction approaching the primary screen plate 51, so that a laser range of the shredding assembly 53 is wider. In this embodiment, five groups of torrent nozzle groups are spaced about the axis of the classifying screen furnace section 12. The torrent shower nozzle 531 is connected with the transfer line 532, and the transfer line 532 is located outside the coke oven 1, and the transfer line 532 is kept away from the one end of coke oven 1 and is connected with the first drive source 533, and the first drive source 533 is specifically configured as a high-pressure water pump. The first drive source 533 delivers an external water source into the infusion tube 532, which is ejected along the torrent nozzle 531 to break up the char product on the primary screen plate 51.
Referring to fig. 2 and 3, a grinder 54 is provided between the primary screen plate 51 and the secondary screen plate 52, and the grinder 54 includes a rolling tank 541 rotatably provided in the classifying furnace section 12 and a plurality of rolling balls 542 provided in the rolling tank 541. In the embodiment, the calendaring tank 541 is hollow cylindrical, the axis of the calendaring tank 541 is perpendicular to the axis of the coke making furnace 1, and two ends of the calendaring tank 541 are rotatably connected with the inner side wall of the screening furnace section 12. The outer circumferential side wall of the calendaring tank 541 is provided with strip-shaped feed inlets 5411, and 4 feed inlets 5411 are spaced apart around the axis of the calendaring tank 541. The diameter of the calendaring balls 542 is greater than the width of the feed opening 5411 to reduce the likelihood that the calendaring balls 542 will fall out of the calendaring tank 541 from the feed opening 5411. A second driving source 55 is fixed on the outer side wall of the coke oven 1, the second driving source 55 is specifically set as a motor, and the output of the second driving source 55 is pumped through the side wall of the coke oven 1 and is fixedly connected with one end of the calendaring tank 541 in a coaxial manner.
Referring to fig. 2 and 3, a driving member 56 is fixed to the outer side wall of the rolling tank 541, the driving member 56 includes driving bars, in this embodiment, the driving bars are provided at both ends of the rolling tank 541, and the driving bars at one end of the rolling tank 541 are provided at intervals of two around the axis of the rolling tank 541. An elastic buffer member 6 is fixed between the inner side wall of the chute 121 and the primary screen plate 51, in this embodiment, the elastic buffer member 6 is specifically provided as a buffer spring, and the buffer spring is provided with a plurality of buffer springs at equal intervals around the axis of the primary screen plate 51. The calendaring tank 541 is tangential to the secondary screen plate 52, and the secondary screen plate 52 is provided with a relief hole 521 through which the driving member 56 passes.
When the second driving source 55 drives the rolling tank 541 to rotate, the carbonized product on the primary screen plate 51 falls into the rolling tank 541 along the feed port 5411, is crushed and ground, and falls out of the rolling tank 541 from the feed port 5411. The driving member 56 on the rolling tank 541 is repeatedly moved to be separated from the primary screen plate 51 after being abutted against the primary screen plate 51 when the rolling tank 541 rotates, and the primary screen plate 51 vibrates under the action of the driving member 56 and the elastic buffer member 6. The outer circumferential side wall of the calendaring tank 541 is tangent to the secondary screen plate 52, and when the calendaring tank 541 rotates, the outer side wall of the calendaring tank 541 grinds the carbonized product on the secondary screen plate 52, further reducing the particle size of the carbonized product, so that the carbonized product can be fully activated and the activation rate can be accelerated. In other implementations of this embodiment, the rolling bump may be fixed on the outer circumferential side of the rolling tank 541, so that the outer sidewall of the rolling tank 541 is rugged, facilitating rolling.
Referring to fig. 2, cooling pipes 8 are arranged in the cooling furnace section 14, one ends of the cooling pipes 8 penetrate into the cooling furnace section 14 and are distributed in a spiral tube shape in the cooling furnace section 14, and active coke generated by the activation furnace section 13 is cooled after penetrating out of the cooling furnace section 14. The end of the cooling furnace section 14, which is far away from the activation furnace section 13, is gradually reduced towards the direction far away from the activation furnace section 13 and is communicated with a discharge pipe 141, a discharge valve 142 is arranged on the discharge pipe 141, and the discharge valve 142 controls the opening and closing of the discharge pipe 141.
Referring to fig. 3 and 4, a flue gas recirculation assembly 2 is disposed on one side of the coke oven 1, the flue gas recirculation assembly 2 includes a flue gas recirculation pipe 21 and a third driving source 22, the flue gas recirculation pipe 21 includes a flue gas recovery pipe 211 and a plurality of flue gas shunt pipes 212 connected to the flue gas recovery pipe 211, one end of the flue gas recovery pipe 211 is directly communicated with the carbonization oven segment 11, the other end is communicated with one flue gas shunt pipe 212, and one end of the flue gas shunt pipe 212 far away from the flue gas recovery pipe 211 is directly communicated with the activation oven segment 13. In this embodiment, two flue gas shunt tubes 212 are provided at intervals. The third driving source 22 is specifically configured as an air pump, and the third driving source 22 is installed at one end of the flue gas recovery tube 211 near the carbonization furnace section 11, and is used for driving the flue gas in the coke oven 1 to move towards the flue gas recovery tube 211.
Referring to fig. 3 and 4, in order to allow the activation reaction in the activation oven section 13 to proceed smoothly, a steam supplementing assembly 3 is further provided at one side of the coke oven 1, and the steam supplementing assembly 3 includes a steam supplementing chamber 31 and a steam transporting pipe group 32 communicating with the steam supplementing chamber 31. The flue gas recovery tube 211 further comprises an auxiliary heat tube section arranged in the steam supplementing chamber 31, and the auxiliary heat tube section is spirally arranged in the steam supplementing chamber 31. So that the flue gas supplies heat to the steam make-up chamber 31. The waste gas incinerator 4 is arranged on one side of the steam supplementing chamber 31, the flue gas recovery pipe 211 is communicated with the flue gas treatment pipe 2111, and the flue gas treatment pipe 2111 is communicated with the waste gas incinerator 4, so that a part of flue gas subjected to heat exchange in the steam supplementing chamber 31 enters the waste gas incinerator 4 along the flue gas treatment pipe 2111 to be combusted.
Referring to fig. 3 and 4, the steam transporting pipe group 32 includes a steam heat sustaining pipe 33 and a first gas pipe 321 and a second gas pipe 322 which are communicated with the steam heat sustaining pipe 33, the steam heat accumulating pipe is communicated with the steam supplementing chamber 31, and the steam heat sustaining pipe 33 is spirally distributed in the exhaust gas incinerator 4, so that the exhaust gas incinerator 4 re-heats the steam. The first air pipe 321 and the second air pipe 322 are both communicated with the pipe section of the steam continuous heat pipe 33 penetrating out of the waste gas incinerator 4.
Referring to fig. 2 and 4, the second air pipe 322 is located at a side of the cooling furnace section 14 close to the activation furnace section 13, and the second air pipe 322 extends into the activation furnace section 13 along a horizontal direction to form an extension pipe section 3221, a plurality of air nozzles 3222 are disposed on the extension pipe section 3221 of the second air pipe 322 at intervals, and the air nozzles 3222 are disposed towards a direction close to the flue gas diversion pipe 212. The flue gas shunt tube 212 close to the second gas pipe 322 is communicated with an air combustion-supporting pipeline 7, and a fourth driving source 71 is installed on the air combustion-supporting pipeline 7, and the fourth driving source 71 is specifically set as an air pump.
The flue gas in the flue gas recovery tube 211 flows into the flue gas diversion tube 212 after heat exchange in the steam supplementing chamber 31, so that the temperature of the flue gas and the temperature of the air entering the activation furnace section 13 are lower than the temperature of the steam entering the activation furnace section 13. The gas ejected from the air nozzles 3222 on the extension tube section 3221 forms a high temperature gas flow that pushes the flue gas and air upward.
The implementation principle of the flue gas recirculation coke making system in the embodiment of the application is as follows: the materials are put into the coke oven 1 from the feed hopper 15, and the materials are heated to carry out carbonization reaction in the carbonization oven section 11. The third drive source 22 and the fourth drive source 71 are started, so that the smoke circulation is performed in the coke oven 1, and oxygen is supplemented for the carbonization reaction. The carbonized product obtained by the carbonization reaction is transported into the screening furnace section 12 and screened sequentially by the primary screen plate 51 and the secondary screen plate 52. Starting the first driving source 533 to make the exciting flow nozzle 531 emit high pressure exciting flow to break up the large granular carbonized product on the first screen plate 51; the second driving source 55 is started to operate the grinder 54 to grind the carbonized product located between the primary screen plate 51 and the secondary screen plate 52 to reduce the size of the carbonized product so that the carbonized product is sufficiently contacted with the activating gas. The carbonized product after being crushed and ground enters the activation furnace section 13 to be continuously heated to participate in the activation reaction to produce active coke. The activated coke finally enters the cooling furnace section 14 and is cooled to room temperature, and then the activated coke can be collected.
The application also discloses a preparation method of the active coke, which uses the flue gas recirculation coke making system to prepare the active coke and comprises the following steps:
s1, feeding materials into a coke oven 1 from a feed hopper 15, and heating the materials to enable the materials to carry out carbonization reaction in a carbonization oven section 11;
s2, starting the third driving source 22 and the fourth driving source 71 to circulate smoke in the coke oven 1, and simultaneously supplementing oxygen into the coke oven 1;
s3, starting a first driving source 533 to enable a torrent nozzle 531 to emit high-pressure torrent to break up large-particle carbonized products on a first-stage screen plate 51; meanwhile, the second driving source 55 is started to enable the grinder 54 to operate, and carbonized products located between the primary screen plate 51 and the secondary screen plate 52 are ground;
s4, continuously heating the crushed and ground carbonized product in an activation furnace section 13;
s5, the active coke enters the cooling furnace section 14, and after the active coke in the cooling furnace section 14 is cooled to room temperature, the active coke is collected.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (7)
1. A flue gas recirculation coke making system, characterized by: comprises a coke making furnace (1), a smoke recycling component (2) communicated with the coke making furnace (1), a steam supplementing component (3) and an exhaust gas incinerator (4);
the coke making furnace (1) comprises a carbonization furnace section (11), a screening furnace section (12) and an activation furnace section (13) which are communicated with each other, the screening furnace section (12) is positioned between the carbonization furnace section (11) and the activation furnace section (13), a screening component (5) is arranged in the screening furnace section, the screening component (5) comprises a primary screen plate (51) and a secondary screen plate (52) which are arranged in the screening furnace section (12) at intervals, and the primary screen plate (51) is arranged in the coke making furnace (1) in a sliding manner along the vertical direction;
a crushing component (53) for crushing carbonized products is arranged on one side of the primary screen plate (51), and a grinder (54) for grinding the carbonized products is arranged between the primary screen plate (51) and the secondary screen plate (52);
the crushing assembly (53) comprises a torrent nozzle (531) and a liquid delivery pipe (532) communicated with the torrent nozzle (531), wherein the liquid delivery pipe (532) is connected with a first driving source (533) for transporting liquid; the torrent spray heads (531) are obliquely arranged towards the direction close to the primary screen plate (51), and a plurality of torrent spray heads (531) are distributed at intervals along the vertical direction;
the grinder (54) comprises a rolling tank (541) rotatably arranged in the screening furnace section (12) and rolling balls (542) arranged in the rolling tank (541), a feed inlet (5411) is formed in the outer side wall of the rolling tank (541), and a second driving source (55) for driving the rolling tank (541) to rotate is arranged outside the coke making furnace (1);
the rolling tank (541) is provided with a driving piece (56) for driving the primary screen plate (51) to slide, the inner side wall of the screening furnace section (12) is provided with a sliding groove (121) for the primary screen plate (51) to slide, and an elastic buffer piece (6) is arranged between the inner side wall of the sliding groove (121) and the primary screen plate (51).
2. A flue gas recirculation coking system according to claim 1, wherein: the flue gas recirculation assembly (2) comprises a flue gas recirculation pipeline (21) and a third driving source (22) arranged on the flue gas recirculation pipeline (21), wherein the third driving source (22) is used for driving flue gas at the carbonization furnace section (11) to move into the flue gas recirculation pipeline (21); the flue gas recycling pipeline (21) comprises a flue gas recycling pipe (211) and a flue gas shunt pipe (212) which are communicated with each other, and the flue gas recycling pipe (211) is communicated with the carbonization furnace section (11) and the waste gas incinerator (4); the flue gas shunt tubes (212) are arranged at intervals, and one end, away from the flue gas recovery tube (211), of each flue gas shunt tube (212) is communicated with the activation furnace section (13).
3. A flue gas recirculation coking system according to claim 2, wherein: the steam supplementing assembly (3) comprises a steam supplementing chamber (31) and a steam conveying pipe group (32) communicated with the steam supplementing chamber (31), and the steam conveying pipe group (32) is communicated with the activation furnace section (13); the flue gas recovery pipe (211) comprises auxiliary heat pipe sections penetrating through the steam supplementing chamber (31), and the auxiliary heat pipe sections are spirally distributed.
4. A flue gas recirculation coking system according to claim 3, characterized in that: the steam transportation pipe group (32) comprises a first air pipe (321) and a second air pipe (322) which are arranged at intervals, and the first air pipe (321) and the second air pipe (322) are communicated with the activation furnace section (13).
5. A flue gas recirculation coking system according to claim 2, wherein: the coke making furnace (1) is also communicated with an air combustion-supporting pipeline (7), one end of the air combustion-supporting pipeline (7) is provided with a fourth driving source (71) for transporting gas, and the other end of the air combustion-supporting pipeline is communicated with a flue gas shunt pipe (212) far away from the activation furnace section (13).
6. A flue gas recirculation coking system according to claim 4, wherein: an extension pipe section (3221) is communicated with the second gas pipe (322), and the extension pipe section (3221) is positioned in the activation furnace section (13); the extension pipe section (3221) is located one side of the flue gas shunt tube (212) far away from the screening furnace section (12), and a plurality of air nozzles (3222) are arranged on the extension pipe section (3221) at intervals.
7. A preparation method of active coke is characterized in that: active coke production using a flue gas recirculation coke making system according to any one of claims 1-6.
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