A dry quenching coke oven and a dry quenching coke waste heat utilization system

Abstract

The present invention relates to a dry quenching coke oven and a dry quenching coke waste heat utilization system, and belongs to the technical field of dry quenching ovens. A dry quenching coke oven provided by the present invention comprises a furnace body, a bottom hopper, an air hood, a first cooling air duct and a second cooling air duct. The bottom of the furnace body is in an inverted cone shape, the bottom hopper is in an inverted cone shape, and the discharge port directly opposite the furnace body is arranged below the furnace body. The air hood is located at the bottom of the inner cavity of the furnace body, and comprises a cap body and a top cover connected to the top of the cap body. A plurality of first cooling air ducts are arranged on the side wall of the furnace body, and the air outlet end of each first cooling air duct extends to the first discharge area and is arranged toward the top cover. A plurality of second cooling air ducts are arranged on the side wall of the furnace body, and the air outlet end of the second cooling air duct is located in the second discharge area and is arranged toward the cap body. A dry quenching coke oven provided by the present invention can extend the service life of the air hood, and a dry quenching coke waste heat utilization system provided by the present invention can avoid heat waste, save energy and protect the environment.

Description

Technical Field

[0001] The invention relates to the technical field of dry quenching furnaces, and in particular to a dry quenching coke furnace and a dry quenching coke waste heat utilization system. Background Art

[0002] The dry quenching coke oven is a device used to cool coke in steel production. Its working principle is to use nitrogen or other inert gases as circulating cooling media to replace the traditional water quenching method to cool the hot red coke. When in use, the high-temperature red coke coming out of the coke oven is transferred to the dry quenching oven, and then the circulating fan sends nitrogen or other inert gases to the bottom of the dry quenching oven. The high-temperature gas absorbs the heat released by the red coke during the rising process, so that the coke is cooled. The gas that absorbs the heat of the red coke will then enter the dry quenching boiler to heat the boiler to achieve heat recovery.

[0003] The air cap of the dry quenching furnace is an important component structure in the dry quenching coke oven. It is located at the bottom of the dry quenching coke oven and is used to guide the inert gas into the dry quenching coke oven so that the gas can be evenly distributed inside the furnace. For example, a new type of dry quenching furnace disclosed in the patent with the authorization announcement number CN218025929U includes a furnace body, which includes a feed cylinder, a cooling cylinder, a discharge cylinder and an air outlet pipe. The inner wall of the cooling cylinder is rotatably mounted with a rotating cylinder, and the side wall of the cooling cylinder is inserted with an air inlet pipe. The upper wall of the air inlet pipe is mounted with an air cap, and the side wall of the air cap is provided with an air outlet hole, and the air inlet pipe is communicated with the inner cavity of the air cap.

[0004] In the new dry quenching furnace, the hood is located at the bottom of the dry quenching furnace. During use, since the hood is generally closed at the top and has a structure with air outlets around it, the wind blown into the dry quenching furnace body by the hood is generally difficult to blow directly to the top of the hood, which will cause the red coke above the hood to cool down slowly, and the top of the hood will be in a high temperature state for a long time and easy to be damaged. At the same time, the furnace body of the dry quenching furnace is generally high. During the initial process of adding red coke into the dry quenching furnace, the high-temperature red coke falls directly from a high place onto the hood, which will not only cause serious impact on the hood, but also cause the hood to melt and deform. During the feeding process, oxygen-containing air will also be introduced from the feed port of the dry quenching furnace, causing the red coke in the furnace body to burn more and the temperature in the furnace body to rise. The above problems will cause the ambient temperature around the hood to be too high, and the hood will be easily burned, with a short service life, affecting the normal operation of the furnace body. Summary of the invention

[0005] The invention provides a dry quenching coke oven to solve the technical problem in the prior art that the air hood in the dry quenching coke oven has a short service life due to the high ambient temperature.

[0006] The present invention also provides a CDQ waste heat utilization system, which can recycle the heat of red coke in the CDQ furnace to avoid heat waste.

[0007] In order to solve the above problems, the present invention provides a dry quenching coke oven adopting the following technical solution:

[0008] A dry quenching coke oven, comprising:

[0009] The furnace body has an inverted cone-shaped bottom, a material inlet is provided at the top of the furnace body, and a material outlet is provided at the bottom;

[0010] The bottom hopper is in an inverted cone shape and is located below the furnace body, facing the discharge port of the furnace body;

[0011] The hood is located at the bottom of the inner cavity of the furnace body, and comprises a hood body and a top cover connected to the top of the hood body. The hood body is provided with an air outlet for inputting inert gas into the inner cavity of the furnace body;

[0012] Also includes:

[0013] A plurality of first cooling air ducts are arranged on the side wall of the furnace body and are evenly distributed around the hood. One end of the first cooling air duct close to the hood is an air outlet end. An annular area in the inner cavity of the furnace body located outside the hood and facing the outlet end of the bottom hopper up and down is defined as a first discharge area. The air outlet ends of the first cooling air ducts extend into the first discharge area and are arranged toward the top cover.

[0014] A plurality of second cooling air ducts are passed through the side walls of the furnace body and are evenly distributed around the hood. The second cooling air ducts and the first cooling air ducts are alternately arranged in sequence in the circumferential direction of the furnace body. The end of the second cooling air duct close to the hood is the air outlet end. The annular area outside the first discharge area in the inner cavity of the furnace body is defined as the second discharge area. The air outlet end of the second cooling air duct is located in the second discharge area and is arranged toward the hood.

[0015] By adopting the above technical scheme, the first cooling air duct is used to blow air towards the top cover in the hood, so that the top cover of the hood and the red coke near the top cover can be cooled, and the cooling speed of the red coke directly above the hood can be accelerated to prevent the top of the hood from being in a high temperature environment for a long time and being easily burned. By blowing air towards the cap body in the hood through the second cooling air duct, the cap body part can be cooled, further enhancing the cooling effect of the hood, which is beneficial to extending the service life of the hood.

[0016] When the first cooling air duct is not introduced into the furnace body, the material in the middle of the furnace body falls faster because the middle of the furnace body is opposite to the bottom outlet of the bottom hopper, while the material close to the side wall of the furnace body falls slower due to the friction between the side wall of the furnace body and the tapered inner wall of the tapered discharge port. Therefore, during the discharge process, the top of the material accumulated in the furnace body presents a concave state, and generally, the top furnace wall of the dry quenching coke oven is provided with ventilation holes for extracting hot air for recycling, so that as the material is discharged, the ventilation holes will be exposed later.

[0017] Due to the addition of the first cooling air duct for blowing air to cool the wind hood and the red coke above the wind hood, the first cooling air duct blocks the space directly above the bottom outlet end of the bottom hopper, and also blocks the space on the side directly above the bottom hopper outlet end. However, since the proportion of the space directly above the bottom hopper outlet end blocked by the first cooling air duct is greater than the proportion of the space directly above the bottom hopper outlet end blocked by the first cooling air duct, the falling speed of the material in the middle of the furnace body is lower than the falling speed of the material near the inner wall of the furnace body. As a result, the top of the material accumulated in the furnace body presents an upward convex state. In this way, during the discharge process, the ventilation holes on the side walls of the furnace body will be exposed earlier, and the ventilation holes are generally connected to the negative pressure chamber. After being exposed, the external oxygen-containing air will be sucked into the furnace body from the gaps on the furnace body earlier, causing the red coke in the furnace to reignite earlier, resulting in an increase in the temperature in the furnace and making the environment around the wind hood worse.

[0018] After adding the second cooling air duct, not only can the cap body part of the hood be cooled and the cooling speed of the environment around the hood be accelerated, but also the shielding ratio of the side space just above the outlet end of the bottom hopper can be increased, and the falling speed of the material close to the side wall of the furnace body can be slowed down, so as to avoid the top of the material in the furnace body presenting a convex state during the discharge process, thereby avoiding the ventilation holes on the top side wall of the furnace body from being exposed too early, and avoiding the external oxygen-containing air from entering the inner cavity of the furnace body too early, causing the red coke in the furnace body to reignite and the temperature to rise.

[0019] Furthermore, the first cooling air duct and the second cooling air duct both extend in the radial direction of the furnace body, and the air outlet end of the first cooling air duct and the air outlet end of the second cooling air duct both tilt downward.

[0020] By adopting the above technical solution, the air outlet ends of the first cooling air duct and the second cooling air duct are both tilted downward, which can prevent the falling red coke from falling into the first cooling air duct and the second cooling air duct and causing blockage of the first cooling air duct and the second cooling air duct.

[0021] Furthermore, the side wall of the furnace body is provided with a plurality of first through holes for the first cooling air duct to penetrate, and a plurality of second through holes for the second cooling air duct to penetrate, and the first through holes are located above the second through holes.

[0022] By adopting the above technical solution, the first perforation is located above the second perforation, and the first perforation and the second perforation are staggered up and down. Compared with setting the first perforation and the second perforation at the same height, the problem of too many perforations in the same height area on the side wall of the furnace body, which leads to weakening of the structural strength of the area, can be avoided.

[0023] Furthermore, the first cooling air duct and the second cooling air duct both have tube holes with variable diameters, and the diameters of the tube holes in the first cooling air duct and the second cooling air duct both gradually decrease from the outside to the inside.

[0024] By adopting the above technical solution, the exhaust gas flow rate is higher and the cooling effect on the hood is better.

[0025] Furthermore, a pressure block is provided above the top cover.

[0026] By adopting the above technical solution, the pressure-bearing block can be provided to strengthen the structural strength of the hood top cover, thereby preventing the hood top cover from being severely deformed when red coke falls onto the hood top cover from a high place.

[0027] Furthermore, a bottom box is provided at the bottom of the furnace body, the top of the bottom box has an opening, and an air inlet is provided on the circumferential side wall of the bottom box, the bottom of the furnace body is inserted into the inner side of the bottom box through the opening at the top of the bottom box, the bottom hopper is located in the bottom box, the discharge end at the bottom of the bottom hopper passes through the bottom box and extends to the bottom of the bottom box, a spacing is provided between the inner side wall of the bottom hopper and the outer side wall of the furnace body so that an annular gap is formed between the bottom hopper and the furnace body, a cross ventilation duct is provided on the inner side of the bottom hopper, the four duct ends of the cross ventilation duct all pass through the circumferential side wall of the bottom hopper and are connected with the inner cavity of the bottom box, and the wind hood is connected to the top of the cross ventilation duct and is connected to the inner cavity of the cross ventilation duct.

[0028] By adopting the above technical scheme, inert gas is inputted from the air inlet on the bottom box body. After the inert gas enters the inner cavity of the bottom box body, a part of it enters the inner cavity of the cross ventilation duct from the four pipe ends of the cross ventilation duct, and then is inputted into the middle part of the inner cavity of the furnace body through the wind hood to cool the red coke in the middle part of the inner cavity of the furnace body, and the other part of the inert gas enters the inner cavity of the furnace body from the annular gap to cool the red coke in the inner cavity of the furnace body close to the side wall of the furnace body, thereby achieving uniform cooling of the red coke in the inner cavity of the furnace body.

[0029] Furthermore, the furnace body includes a pre-storage furnace body section, a conical ramp section and a cooling furnace body section which are arranged in sequence from top to bottom, the feed port is located at the top of the pre-storage furnace body section, the discharge port is located at the bottom of the cooling furnace body section, the conical ramp section is provided with ventilation holes, the outer sides of the pre-storage furnace body section and the conical ramp section are surrounded by an annular shell, the annular shell covers the outer side of the ventilation hole, a distance is provided between the inner side wall of the annular shell and the outer side walls of the pre-storage furnace body section and the conical ramp section to form an annular suction chamber, and the annular shell is provided with a suction port connected to the suction chamber.

[0030] A dry coke quenching waste heat utilization system provided by the present invention comprises the above-mentioned dry coke quenching oven, and also comprises a first circulation pipeline, a second circulation pipeline, a third circulation pipeline, a boiler and a circulation fan, the boiler having a heating chamber, one end of the first circulation pipeline is connected to the air suction port on the annular shell and communicates with the air suction chamber, and the other end is connected to the boiler and communicates with the heating chamber, one end of the second circulation pipeline is connected to the boiler and communicates with the heating chamber, and the other end is connected to the inlet of the circulation fan, one end of the third circulation pipeline is connected to the outlet of the circulation fan, and the other end is connected to the air inlet of the bottom box and communicates with the inner cavity of the bottom box.

[0031] By adopting the above technical scheme, the circulating fan can suck the inert gas heated by the red coke in the furnace body into the heating chamber of the boiler. The heated inert gas transfers the heat to the boiler to heat the boiler. The inert gas after the heat is dissipated is sent into the furnace body again by the circulating fan to cool the red coke in the furnace body, thereby realizing the recycling of the heat of the red coke and avoiding heat waste.

[0032] The beneficial effect of a dry quenching coke oven provided by the present invention is that the first cooling air duct and the second cooling air duct are used to cool the wind cap and the red coke on the top thereof, which can effectively accelerate the cooling speed of the red coke and reduce the ambient temperature around the wind cap, thereby preventing the wind cap from being burned in a short period of time and effectively extending the service life of the wind cap. The addition of the second cooling air duct can prevent the top of the material from presenting a convex state during the discharge process, and prevent the external air from being sucked into the furnace body too early, which has an adverse effect on the cooling of the red coke in the furnace body.

[0033] The beneficial effect of the CDQ waste heat utilization system provided by the present invention is that the heat of red coke can be collected and utilized, thus avoiding heat loss and being more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0035] Figure 1 A schematic diagram of the structure of a dry quenching coke oven provided by the present invention Figure 1 ;

[0036] Figure 2 A schematic diagram of the structure of a dry quenching coke oven provided by the present invention Figure 2 ;

[0037] Figure 3 A cross-sectional view of a dry quenching coke oven provided by the present invention Figure 1 ;

[0038] Figure 4 A cross-sectional view of a dry quenching coke oven provided by the present invention Figure 2 ;

[0039] Figure 5 for Figure 4 A schematic diagram of the structure after omitting the first cooling air duct and the second cooling air duct;

[0040] Figure 6 A cross-sectional view of a first cooling air duct in a dry quenching coke oven provided by the present invention;

[0041] Figure 7 A schematic diagram of the structure of an air hood in a dry quenching coke oven provided by the present invention;

[0042] Figure 8 A structural schematic diagram of a dry coke quenching waste heat utilization system provided by the present invention.

[0043] Description of reference numerals:

[0044] 1. Furnace body; 101. Pre-stored furnace body section; 102. Cooling furnace body section; 103. Discharge port; 104. Feed port; 2. Bottom box; 201. Air inlet; 3. Annular shell; 301. Air suction port; 4. Conical ramp section; 401. Ventilation hole; 5. Air suction chamber; 6. First cooling air duct; 7. Second cooling air duct; 8. Wind hood; 801. Pressure block; 9. Cross ventilation duct; 10. Bottom hopper; 11. First circulation pipeline; 12. Boiler; 1201. Heating chamber; 13. Second circulation pipeline; 14. Circulation fan; 15. Third circulation pipeline; 16. Annular gap; 17. First discharge area; 18. Second discharge area. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0046] The following is an embodiment of a dry quenching coke oven provided by the present invention:

[0047] like Figure 1 , Figure 2 , Figure 3 As shown, a dry quenching coke oven includes a furnace body 1, a bottom box body 2, a bottom hopper 10, a cross ventilation duct 9, a hood 8, a first cooling air duct 6 and a second cooling air duct 7.

[0048] The furnace body 1 comprises a pre-stored furnace body section 101, a conical chute section 4 and a cooling furnace body section 102 arranged in sequence from top to bottom. The top of the pre-stored furnace body section 101 is conical, and a circular opening is provided at the top of the pre-stored furnace body section 101, and the circular opening forms an inlet 104 of the furnace body 1. The conical chute section 4 is conical, and the top size of the conical chute section 4 is smaller than the bottom size of the conical chute section 4. The conical chute section 4 is provided with a plurality of ventilation holes 401 evenly distributed in the circumferential direction, and the ventilation holes 401 are square. The outer diameter of the cooling furnace body section 102 is larger than the outer diameter of the pre-stored furnace body section 101, and the bottom of the cooling furnace body section 102 is inverted conical, and a circular opening is provided at the bottom of the cooling furnace body section 102, and the circular opening forms an outlet 103 of the furnace body 1. An annular shell 3 is provided around the outer sides of the pre-stored furnace body section 101 and the conical ramp section 4. The annular shell 3 covers the ventilation holes 401 on the conical ramp section 4. A gap is provided between the inner wall of the annular shell 3 and the outer side walls of the pre-stored furnace body section 101 and the conical ramp section 4 to form an air suction chamber 5 surrounding the furnace body 1. The annular shell 3 is provided with an air suction port 301 connected to the air suction chamber 5.

[0049] The bottom box body 2 is cylindrical, and an opening is provided at the top of the bottom box body 2. The top of the bottom box body 2 is welded to the outer wall of the inverted cone-shaped part of the bottom of the furnace body 1. The bottom end of the furnace body 1 extends into the bottom box body 2, and an air inlet 201 is provided on the circumferential side wall of the bottom box body 2.

[0050] like Figure 3 , Figure 7 As shown, the bottom hopper 10 is in an inverted cone shape, and the bottom hopper 10 is arranged below the furnace body 1 opposite to the discharge port 103 of the furnace body 1. A gap is provided between the inner wall of the bottom hopper 10 and the outer wall of the furnace body 1 to form an annular gap 16, and the bottom end of the bottom hopper 10 passes through the bottom box body 2 and extends to the bottom of the bottom box body 2.

[0051] like Figure 7 As shown, the cross ventilation duct 9 is horizontally arranged in the bottom hopper 10 , and the cross ventilation duct 9 has four ventilation ends evenly arranged circumferentially. The four ventilation ends of the cross ventilation duct 9 all extend to the side wall of the bottom hopper 10 and are connected to the inner cavity of the bottom box body 2 .

[0052] like Figure 3 , Figure 7 As shown, the hood 8 is located at the top of the cross ventilation duct 9 and is connected to the inner cavity of the cross ventilation duct 9. The hood 8 extends into the inner side of the inverted cone-shaped part of the bottom of the furnace body 1. The hood 8 includes a hood body and a top cover connected to the top of the hood body. The hood body is provided with an air outlet, and the top cover is provided with a pressure block 801.

[0053] like Figure 3 , Figure 4As shown, there are a plurality of first cooling air ducts 6, and the plurality of first cooling air ducts 6 are all penetrated on the side wall of the furnace body 1, and the plurality of first cooling air ducts 6 extend along the radial direction of the furnace body 1 and are evenly distributed in the circumferential direction of the furnace body 1, and the furnace body 1 is provided with a plurality of first through holes evenly arranged in the circumference for the first cooling air ducts 6 to penetrate. The end of the first cooling air duct 6 close to the wind hood 8 is the air outlet end of the first cooling air duct 6, and the air outlet ends of the first cooling air duct 6 are inclined from top to bottom toward the top cover on the wind hood 8. The annular area in the inner cavity of the furnace body 1, which is located outside the wind hood 8 and directly opposite to the bottom outlet of the bottom hopper 10, is defined as the first discharge area 17. The position of the first discharge area 17 is shown in FIG. Figure 5 As shown, the air outlet end of each first cooling air duct 6 extends into the first discharge area 17 .

[0054] like Figure 6 As shown, the diameter of the tube hole of the first cooling air duct 6 decreases from the outside to the inside, so that a higher wind speed is generated at the air outlet end of the first cooling air duct 6.

[0055] like Figure 3 , Figure 4 As shown, there are multiple second cooling air ducts 7, and the second cooling air ducts 7 are shorter than the first cooling air ducts 6. The multiple second cooling air ducts 7 are all penetrated on the side wall of the furnace body 1. The multiple second cooling air ducts 7 extend along the radial direction of the furnace body 1 and are evenly distributed in the circumferential direction of the furnace body 1. The side wall of the furnace body 1 is provided with multiple second through-holes evenly arranged in the circumference for the second cooling air ducts 7 to penetrate, and the second through-holes are located below the first through-holes. The end of the second cooling air duct 7 close to the wind cap 8 is the air outlet end of the second cooling air duct 7, and the multiple second cooling air ducts 7 are inclined from top to bottom toward the cap body. The annular area outside the first discharge area 17 in the inner cavity of the furnace body 1 is defined as the second discharge area 18. The position of the second discharge area 18 is as shown in FIG. Figure 5 As shown in the figure, the dotted line is the boundary between the first discharge area 17 and the second discharge area 18, and the entire annular area between the outer side of the dotted line and the inner wall of the furnace body 1 is the second discharge area 18. The air outlet end of each second cooling air duct 7 extends into the second discharge area 18, and each second cooling air duct 7 and each first cooling air duct 6 are alternately arranged in sequence in the circumferential direction of the furnace body 1.

[0056] The diameter of the tube hole of the second cooling air duct 7 decreases from the outside to the inside, so that a higher wind speed is generated at the air outlet end of the second cooling air duct 7.

[0057] When the present invention is in use, the red coke to be cooled is put into the furnace body 1 through the feed port 104, and the inert gas is introduced into the bottom box body 2 through the air inlet 201. A part of the introduced inert gas enters the cross ventilation duct 9 through the ventilation end of the cross ventilation duct 9, and then enters the inner cavity of the furnace body 1 through the hood 8 to cool the red coke in the middle of the furnace body 1. Another part of the inert gas enters the furnace body 1 through the annular gap 16 to cool the red coke in the furnace body 1 close to the side wall of the furnace body 1, thereby achieving uniform cooling of the red coke in the furnace body 1. At the same time, the first cooling duct 6 and the second cooling duct 7 also blow low-temperature inert gas toward the hood 8 to cool the top cover and the cap body in the hood 8, and can also cool the red coke around the hood 8, thereby increasing the cooling speed of the red coke around the hood 8, making the ambient temperature around the hood 8 relatively lower, and preventing the hood 8 from being in a high-temperature environment for a long time and being easily burned. The introduced inert gas flows upward in the furnace body 1 and is discharged from the ventilation holes 401 on the conical ramp section 4, taking away the heat in the red coke.

[0058] The dry coke quenching waste heat utilization system provided by the present invention can cool the wind hood 8 and the red coke around the wind hood 8 by adding the first cooling air duct 6 and the second cooling air duct 7, so as to reduce the peripheral temperature of the wind hood 8 and extend the service life of the wind hood 8.

[0059] In this embodiment, the first cooling air duct 6 and the second cooling air duct 7 are arranged to be inclined from top to bottom toward the wind hood 8 so that the air outlet ends of the first cooling air duct 6 and the second cooling air duct 7 can be inclined downward. In other embodiments, the first cooling air duct 6 and the second cooling air duct 7 are arranged horizontally. At this time, the end faces of the air outlet ends of the first cooling air duct 6 and the second cooling air duct 7 are both located in a vertical plane.

[0060] In this embodiment, the first cooling air ducts 6 and the second cooling air ducts 7 are alternately arranged in sequence in the circumferential direction of the furnace body 1. In other embodiments, two second cooling air ducts 7 may also be arranged between any two adjacent first cooling air ducts 6, and the two second cooling air ducts 7 are evenly arranged between two adjacent first cooling air ducts 6.

[0061] In this embodiment, the first through hole on the furnace body 1 through which the first cooling air duct 6 passes is higher than the second through hole through which the second cooling air duct 7 passes. In other embodiments, the first through hole and the second through hole are located at the same height.

[0062] The following is an embodiment of a dry coke quenching waste heat utilization system provided by the present invention:

[0063] like Figure 8As shown, a dry coke quenching waste heat utilization system includes a dry coke quenching oven, a first circulation pipeline 11, a second circulation pipeline 13, a third circulation pipeline 15, a boiler 12, and a circulation fan 14. The boiler 12 has a heating chamber 1201, one end of the first circulation pipeline 11 is connected to the air suction port 301 on the annular shell 3 and communicates with the air suction chamber 5, and the other end is connected to the boiler 12 and communicates with the heating chamber 1201, one end of the second circulation pipeline 13 is connected to the boiler 12 and communicates with the heating chamber 1201, and the other end is connected to the inlet of the circulation fan 14, and one end of the third circulation pipeline is connected to the outlet of the circulation fan 14, and the other end is connected to the air inlet 201 of the bottom box 2 and communicates with the inner cavity of the bottom box 2.

[0064] When the dry coke quenching waste heat utilization system provided by the present invention is used, the circulating fan 14 is started, so that the circulating fan 14 extracts the heated inert gas in the furnace body 1 and transports it to the heating chamber 1201 at the boiler 12. The heated inert gas can heat the boiler 12. The steam generated by the boiler 12 after heating can be used as a power source for subsequent links. After the heated inert gas flows through the boiler 12, the temperature is reduced and it is cooled. The circulating fan 14 sends the cooled inert gas back to the furnace body 1 to cool the coke. In this cycle, the inert gas and the heat of the coke are reused, which effectively avoids waste of resources and is more energy-saving and environmentally friendly.

Claims

1. A dry quenching coke oven, comprising: The furnace body has an inverted cone-shaped bottom, a material inlet is provided at the top of the furnace body, and a material outlet is provided at the bottom; The bottom hopper is in an inverted cone shape and is located below the furnace body, facing the discharge port of the furnace body; The hood is located at the bottom of the inner cavity of the furnace body, and comprises a hood body and a top cover connected to the top of the hood body. The hood body is provided with an air outlet for inputting inert gas into the inner cavity of the furnace body; It is characterized by further comprising: A plurality of first cooling air ducts are arranged on the side wall of the furnace body and are evenly distributed around the hood. One end of the first cooling air duct close to the hood is an air outlet end. An annular area in the inner cavity of the furnace body located outside the hood and facing the outlet end of the bottom hopper up and down is defined as a first discharge area. The air outlet ends of the first cooling air ducts extend into the first discharge area and are arranged toward the top cover. A plurality of second cooling air ducts are passed through the side walls of the furnace body and are evenly distributed around the hood. The second cooling air ducts and the first cooling air ducts are alternately arranged in sequence in the circumferential direction of the furnace body. The end of the second cooling air duct close to the hood is the air outlet end. The annular area outside the first discharge area in the inner cavity of the furnace body is defined as the second discharge area. The air outlet end of the second cooling air duct is located in the second discharge area and is arranged toward the hood.

2. A dry quenching coke oven according to claim 1, characterized in that: The first cooling air duct and the second cooling air duct both extend in the radial direction of the furnace body, and the air outlet end of the first cooling air duct and the air outlet end of the second cooling air duct both tilt downward.

3. A dry quenching coke oven according to claim 1 or 2, characterized in that: The side wall of the furnace body is provided with a plurality of first through holes for the first cooling air duct to penetrate, and a plurality of second through holes for the second cooling air duct to penetrate, and the first through holes are located above the second through holes.

4. A dry quenching coke oven according to claim 1 or 2, characterized in that: The first cooling air duct and the second cooling air duct both have pipe holes with variable diameters, and the diameters of the pipe holes in the first cooling air duct and the second cooling air duct both gradually decrease from the outside to the inside.

5. A dry quenching coke oven according to claim 1 or 2, characterized in that: A pressure bearing block is arranged above the top cover.

6. A dry quenching coke oven according to claim 1 or 2, characterized in that: A bottom box is provided at the bottom of the furnace body, the top of the bottom box has an opening, and an air inlet is provided on the circumferential side wall of the bottom box. The bottom of the furnace body is inserted into the inner side of the bottom box through the opening at the top of the bottom box. The bottom hopper is located in the bottom box, and the discharge end at the bottom of the bottom hopper passes through the bottom box and extends to the bottom of the bottom box. A spacing is provided between the inner side wall of the bottom hopper and the outer side wall of the furnace body so that an annular gap is formed between the bottom hopper and the furnace body. A cross ventilation duct is provided on the inner side of the bottom hopper, and the four duct ends of the cross ventilation duct all pass through the circumferential side wall of the bottom hopper and are connected to the inner cavity of the bottom box. The wind hood is connected to the top of the cross ventilation duct and is connected to the inner cavity of the cross ventilation duct.

7. A dry quenching coke oven according to claim 1 or 2, characterized in that: The furnace body includes a pre-stored furnace body section, a conical ramp section and a cooling furnace body section which are arranged in sequence from top to bottom, the feed port is located at the top of the pre-stored furnace body section, the discharge port is located at the bottom of the cooling furnace body section, the conical ramp section is provided with ventilation holes, the outer sides of the pre-stored furnace body section and the conical ramp section are surrounded by an annular shell, the annular shell covers the outer side of the ventilation hole, a spacing is provided between the inner side wall of the annular shell and the outer side walls of the pre-stored furnace body section and the conical ramp section to form an annular suction chamber, and the annular shell is provided with a suction port connected to the suction chamber.

8. A system for utilizing waste heat from dry coke quenching, characterized in that: A dry quenching coke oven as described in claim 7, further comprising a first circulation pipeline, a second circulation pipeline, a third circulation pipeline, a boiler and a circulation fan, the boiler having a heating chamber, one end of the first circulation pipeline being connected to the air suction port on the annular shell and communicating with the air suction chamber, the other end being connected to the boiler and communicating with the heating chamber, one end of the second circulation pipeline being connected to the boiler and communicating with the heating chamber, the other end being connected to the inlet of the circulation fan, one end of the third circulation pipeline being connected to the outlet of the circulation fan, the other end being connected to the air inlet of the bottom box and communicating with the inner cavity of the bottom box.

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