Coke oven side flame path temperature compensation heating method and device

Abstract

The invention discloses a coke oven side flame path temperature compensation heating method and device, and belongs to the technical field of coke oven temperature control, the device specifically comprises an extension oven body, a flame path rock opening sleeves the center of the top of the extension oven body, and an inner combustion-supporting frame connected with the extension oven body is arranged on the inner wall of the bottom of the flame path rock opening; a plurality of lifting air cylinder frames are symmetrically arranged between the inner wall of the top of the flame path rock opening and the inner combustion-supporting frame. The compensation extension pipe is used for conveying residual gas in the gas main pipe, the adjusting valve is used for controlling the inlet amount, the lower spraying pipe is matched for increasing gas spraying, the inner combustion-supporting frame introduces external oxygen-containing air for supporting combustion through the circulating fan, the circulating fan extracts high-temperature air for storage and heat exchange, and the situation that the temperature difference is too large for cooling is avoided; heat loss in a flame path rock opening area is reduced, temperature is increased, coke quality is guaranteed, and a furnace body is protected.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven temperature control, in particular to a coke oven side fire channel temperature compensation heating method and device. Background Art

[0002] In coking production, temperature control of the fire channel at the side of the coke oven is extremely important. After years of continuous use, the aging of the coke oven body leads to blockage of the inclined channel and leakage of the brick gas channel, resulting in insufficient air, poor exhaust gas discharge, and reduced gas volume. The corresponding furnace temperature is low, the coke is poorly mature, the coke pushing dust increases, the coke quality decreases, the heating gas burns incompletely, and a large amount of black smoke overflows from the fire hole cover, which increases the heat consumption.

[0003] If the temperature of the fire channel at the side of the coke oven is too low within a certain turnover time, the coke cake at the head of the furnace will not be fully mature within the specified coking time, the smoke will increase when pushing the coke, the coke production and quality will decrease, the bottom of the dry quenching coke tank will be agglomerated, and coke loading will be difficult. After coal is loaded, the temperature at the head of the carbonization chamber will drop rapidly to below 950℃, causing damage to the brickwork and causing problems such as brickwork peeling.

[0004] In the existing technology, most of the methods are to ensure the temperature of the furnace head by raising the standard temperature. Although this can solve the problem to a certain extent, it will lead to an increase in overall energy consumption and have an adverse effect on the heating status of other parts of the furnace body, increasing production costs and environmental pressure; for the problem of low temperature of the side fire channel caused by aging of the furnace body, simple repair methods such as spraying treatment have limited effects, and it is difficult to maintain the ideal temperature state for a long time, and it is impossible to fundamentally solve the problem of insufficient heating of the side fire channel. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for compensating the temperature of a side channel of a coke oven to solve the problem raised.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a coke oven side flue temperature compensation heating device, comprising an extended furnace body, a flue rock mouth sleeved at the center of the top of the extended furnace body, an inner combustion support frame connected to the extended furnace body is provided on the inner wall of the bottom of the flue rock mouth, a plurality of lifting cylinder frames are symmetrically arranged between the inner wall of the top of the flue rock mouth and the inner combustion support frame, upper and lower pumping pipes are symmetrically provided through the inner walls of the top and bottom of the flue rock mouth, and a lower nozzle facing the inner combustion support frame is provided on the inner wall of the lifting cylinder frame;

[0007] A fire channel combustion port connected to the bottom inner wall of the fire channel rock mouth is provided at the top center of the extended furnace body, a compensation box is provided on one side of the top of the extended furnace body, a gas main connected to the extended furnace body is provided on the end face of the compensation box, and a circulation box is provided side by side on the side of the compensation box.

[0008] Furthermore, a plurality of groups of air holes connected to the circulation box are provided through the top of one end of the extended furnace body, an air inlet valve connected to the gas main is provided on the top of one side of the extended furnace body, and a ventilation ring groove close to the inner combustion support frame is provided on the inner wall of the top of the fire channel combustion port.

[0009] Furthermore, a compensation extension pipe connected to the gas main flange is provided inside the compensation box, and the compensation extension pipe is connected to the outer wall of one end of the fire channel rock mouth.

[0010] Furthermore, a box cover is provided on the outer wall of one end of the circulation box, and a circulation fan and a heat storage box are arranged side by side inside the circulation box.

[0011] Furthermore, a U-shaped groove is recessed on the inner wall at the top of the fire channel rock mouth, and a lifting cylinder frame is embedded in the U-shaped groove. Insulating flow pipes close to the U-shaped groove and the inner combustion support frame are respectively provided on the inner walls at the top and bottom of the fire channel rock mouth. Several groups of air diffusion holes are provided inside the inner combustion support frame. Several groups of support rods arranged on the surface of the U-shaped groove are provided on the inner wall at the top of the fire channel rock mouth.

[0012] Furthermore, a crossbeam is slidably sleeved between the tops of the adjacent lifting cylinder frames on the same side, and a fastener connected to the lower nozzle is provided at the bottom of the crossbeam.

[0013] The present invention also provides a coke oven side fire channel temperature compensation heating method, comprising the following steps:

[0014] Coke oven operation: Damage to the combustion port and rock mouth area of the fire channel will cause air and gas problems, affecting the quality of coke and the furnace body, and increasing heat consumption;

[0015] Return coal to make up temperature: Use the compensation extension pipe to transport gas, control the gas volume through the regulating valve, and coordinate with the lifting cylinder to adjust the lower nozzle to increase the gas injection volume and raise the temperature;

[0016] Oxygen-enhancing combustion support: The internal combustion support frame uses a circulating fan to introduce external oxygen-containing air to construct a combustion support area to compensate for the temperature drop in the rock mouth area of the fire channel;

[0017] The circulating fan is also used to extract some of the high-temperature air around the ventilation ring groove and store it inside the heat storage box to perform heat exchange treatment on the external air extracted by the circulating fan, so as to avoid the phenomenon that there is a large temperature difference between the external air and the internal temperature of the flue rock mouth, which causes the injection of external air to further reduce the temperature.

[0018] Oxygen supplementation and temperature increase: The circulating fan extracts high-temperature air and stores it in the temperature storage box, exchanging heat with the external air to avoid temperature drop caused by excessive temperature difference;

[0019] Circulation temperature lock: The circulation fan sends the hot air from the temperature storage box to the upper and lower extraction pipes, reducing the temperature in the rock mouth area of the fire channel, slowing down the temperature loss in the furnace, and stabilizing the temperature in the furnace.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention uses a compensating extension pipe to transport the remaining gas in the gas main to the inside of the flue rock mouth, connects it to the lower nozzle and adjusts the gas injection amount. Combined with the high temperature of the flue combustion port, the gas is ignited to make the combustion more complete, effectively increase the temperature of the flue combustion port and the flue rock mouth area, so as to solve the problem of low temperature caused by regional damage, ensure that the coke in the furnace can mature at an appropriate temperature, reduce smoke and dust during the coke pushing process, improve the coke quality, avoid the decline in output and quality caused by poor coke maturation, increase the flue temperature, and ensure the coke quality.

[0022] 2. The present invention connects the circulating fan through the internal combustion-supporting frame, introduces external oxygen-containing air and diverts it to the diffuser holes, and constructs a spray area with sufficient oxygen content at the bottom of the fire channel rock mouth. This area interacts with the rising flame, heat and injected coal gas to achieve efficient combustion, further improve combustion efficiency, reduce incomplete combustion of heating gas, reduce heat consumption, improve the energy utilization efficiency of the coke oven, enhance the combustion-supporting effect, and optimize the combustion process.

[0023] 3. The present invention extracts high-temperature air around the ventilation ring groove through a circulating fan and stores it in a heat storage box for heat exchange with the extracted external air, thereby reducing the temperature difference between the external air and the inside of the flue rock mouth, avoiding a sudden drop in the temperature of the flue rock mouth caused by excessive temperature difference, protecting the brickwork at the furnace head of the carbonization chamber, preventing the brickwork from peeling off, extending the service life of the furnace body, and reducing maintenance costs; at the same time, the high-temperature hot air in the heat storage box is transported to the upper and lower extraction pipes to maintain the temperature of the inner wall area of the flue rock mouth, reduce heat loss, stabilize the temperature field in the furnace, provide guarantee for the stable operation of the coke oven, stabilize the temperature environment, and protect the furnace body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the fire channel rock mouth of the present invention;

[0027] Figure 3This is a schematic structural diagram of the lifting cylinder frame of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the extended furnace body of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the compensation box of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the circulation box of the present invention.

[0031] Figure markings: 1. Extended furnace body; 101. Fire channel combustion port; 102. Ventilation ring groove; 103. Air inlet valve; 2. Fire channel rock mouth; 201. Internal combustion support frame; 202. Upper extraction pipe; 203. Insulation flow pipe; 204. Lower extraction pipe; 205. Air diffusion hole; 206. Support rod; 3. Circulation box; 301. Box cover; 302. Circulation fan; 303. Temperature storage box; 4. Compensation box; 401. Gas main pipe; 402. Compensation extension pipe; 5. Lifting cylinder frame; 501. Crossbeam; 502. Lower nozzle. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1 - Figure 6 As shown, this embodiment is a temperature compensation heating device for the side flue of a coke oven, comprising an extended furnace body 1, a flue rock mouth 2 is provided in a sleeve arrangement at the top center of the extended furnace body 1, an inner combustion support frame 201 connected to the extended furnace body 1 is provided on the bottom inner wall of the flue rock mouth 2, a plurality of lifting cylinder frames 5 are symmetrically provided between the top inner wall of the flue rock mouth 2 and the inner combustion support frame 201, an upper pumping pipe 202 and a lower pumping pipe 204 are symmetrically provided through the top and bottom inner walls of the flue rock mouth 2, and a lower nozzle 502 facing the inner combustion support frame 201 is provided on the inner wall of the lifting cylinder frame 5.

[0034] During the use of the coke oven, the area inside the extended furnace body 1 near the fire channel combustion port 101 is used under load for a long time, causing abnormal damage to the fire channel combustion port 101 and the fire channel rock port 2 area, resulting in insufficient air volume, poor exhaust gas discharge, and reduced gas injection, which in turn leads to low temperature in the corresponding furnace number, poor coke maturity, increased smoke and dust during the coke pushing process, reduced coke quality, incomplete combustion of the heating gas, and increased heat consumption. After the fire channel combustion port 101 is low, after coal is loaded, the temperature of the carbonization chamber furnace head will drop rapidly to below 950°C, causing greater damage to the brickwork at the carbonization chamber furnace head, and causing brickwork peeling, etc.

[0035] A plurality of groups of air holes connected to the circulation box 3 are provided through the top of one end of the extended furnace body 1, an air inlet valve 103 connected to the gas main pipe 401 is provided on the top of one side of the extended furnace body 1, and a ventilation ring groove 102 close to the inner combustion support frame 201 is provided on the inner wall of the top of the fire channel combustion port 101; a compensation extension pipe 402 flange-connected to the gas main pipe 401 is provided inside the compensation box 4, and the compensation extension pipe 402 is connected to the outer wall of one end of the fire channel rock port 2.

[0036] The remaining gas in the pipe is guided through the gas main 401 to the compensating extension pipe. A regulating valve may be installed between the compensating extension pipe 402 and the gas main 401 to adjust the amount of gas entering the compensating extension pipe 402. The compensating extension pipe 402 extends into the interior of the flue rock opening 2 and is connected to the lower nozzle 502. The lifting cylinder frame 5 drives the crossbeam 501 to slide up and down.

[0037] It is used to adjust the lower nozzle 502 close to the inner combustion support frame 201 area, to spray and increase the gas to the middle area of the inner combustion support frame 201, to ignite the gas in combination with the high temperature inside the fire channel combustion port 101, to accelerate the complete combustion of the overflow gas inside the fire channel combustion port 101, and to increase the temperature of the fire channel combustion port 101 and the fire channel rock port 2 area.

[0038] A box cover 301 is provided on the outer wall of one end of the circulation box 3, and a circulation fan 302 and a heat storage box 303 are arranged side by side inside the circulation box 3. The circulation fan 302 guides part of the high-temperature hot air inside the heat storage box 303 to be transported to the upper extraction pipe 202 and the lower extraction pipe 204, which is used to circulate high-temperature air to the inner wall area of the flue rock mouth 2, thereby effectively reducing the temperature loss in the flue rock mouth 2 area.

[0039] Embodiment 2: This embodiment is a temperature compensation heating device for the side flue of a coke oven, comprising a flue combustion port 101 connected to the bottom inner wall of the flue rock mouth 2 provided at the top center of an extended furnace body 1, a compensation box 4 provided on one side of the top of the extended furnace body 1, a gas main 401 connected to the extended furnace body 1 provided on the end face of the compensation box 4, and a circulation box 3 provided side by side on the side of the compensation box 4.

[0040] The internal combustion support frame 201 pipeline is connected to the circulation fan 302. The circulation fan 302 extracts part of the external itchy air and transports it to the diffusion holes 205 of the internal combustion support frame 201, and guides the internally transported itchy air to be diverted into several groups of diffusion holes 205, which is used to construct a jet-type itchy coverage area at the bottom area of the fire channel rock mouth 2. Combined with the flame and heat rising from the fire channel combustion port 101 and the coal gas sprayed into the area by the lower nozzle 502, the sprayed coal gas is treated to support combustion, which is used to compensate for the temperature drop in the fire channel rock mouth 2 area.

[0041] A U-shaped groove is recessed on the inner wall at the top of the fire channel rock mouth 2, and the lifting cylinder frame 5 is embedded in the U-shaped groove. Insulation flow pipes 203 close to the U-shaped groove and the inner combustion support frame 201 are respectively provided on the inner walls at the top and bottom of the fire channel rock mouth 2. Several groups of air diffusion holes 205 are provided inside the inner combustion support frame 201. Several groups of support rods 206 arranged on the surface of the U-shaped groove are provided on the inner wall at the top of the fire channel rock mouth 2.

[0042] A crossbeam 501 is slidably sleeved between the tops of the adjacent lifting cylinder frames 5 on the same side, and a fastener connected to the lower nozzle 502 is provided at the bottom of the crossbeam 501.

[0043] The circulating fan 302 guides part of the high-temperature hot air inside the heat storage box 303 to the upper extraction pipe 202 and the lower extraction pipe 204, which is used to circulate high-temperature air to the inner wall area of the flue rock mouth 2, effectively reducing the temperature loss in the flue rock mouth 2 area.

[0044] Example 3: Figures 1-6 As shown, the present invention also proposes a coke oven side fire channel temperature compensation heating method, comprising the following steps:

[0045] Coke oven operation: Damage to the combustion port and rock mouth area of the fire channel will cause air and gas problems, affecting the quality of coke and the furnace body, and increasing heat consumption;

[0046] Return coal to make up temperature: Use the compensation extension pipe to transport gas, control the gas volume through the regulating valve, and coordinate with the lifting cylinder to adjust the lower nozzle to increase the gas injection volume and raise the temperature;

[0047] Oxygen-enhancing combustion support: The internal combustion support frame uses a circulating fan to introduce external oxygen-containing air to construct a combustion support area to compensate for the temperature drop in the rock mouth area of the fire channel;

[0048] The circulating fan 302 is also used to extract part of the high-temperature air around the ventilation ring groove 102 and store it inside the heat storage box 303, which is used to perform heat exchange processing on the external air extracted by the circulating fan 302 to avoid a large temperature difference between the external air and the internal temperature of the flue rock mouth 2, which would cause the injection of external air to further reduce the temperature.

[0049] Oxygen supplementation and temperature increase: The circulating fan extracts high-temperature air and stores it in the temperature storage box, exchanging heat with the external air to avoid temperature drop caused by excessive temperature difference;

[0050] Circulation temperature lock: The circulation fan sends the hot air from the temperature storage box to the upper and lower extraction pipes, reducing the temperature in the rock mouth area of the fire channel, slowing down the temperature loss in the furnace, and stabilizing the temperature in the furnace.

[0051] Combining the first, second and third embodiments, it can be seen that during use, the flue burner port 101 and the flue rock port 2 are easily damaged, resulting in abnormal air and gas supply, affecting the quality of coke, increasing heat consumption, and damaging the furnace brickwork. To this end, the improved solution adopted is:

[0052] The compensating extension pipe 402 is used to transport the remaining gas from the gas main 401, and the inlet amount is controlled by a regulating valve. The gas injection is increased in conjunction with the lower nozzle 502. The internal combustion rack 201 uses the circulating fan 302 to introduce external oxygen-containing air for combustion. The circulating fan 302 extracts high-temperature air for storage and heat exchange to avoid cooling due to excessive temperature difference. The hot gas is also transported to the extraction pipe to reduce heat loss in the fire channel rock mouth 2 area, increase the temperature, ensure the quality of coke, and protect the furnace body.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A coke oven side fire channel temperature compensation heating device, comprising an extended furnace body (1), characterized in that: A fire channel rock mouth (2) is sleeved at the center of the top of the extended furnace body (1); an inner combustion support frame (201) connected to the extended furnace body (1) is provided on the inner wall of the bottom of the fire channel rock mouth (2); a plurality of lifting cylinder frames (5) are symmetrically provided between the inner wall of the top of the fire channel rock mouth (2) and the inner combustion support frame (201); an upper layer pumping pipe (202) and a lower layer pumping pipe (204) are symmetrically provided through the inner walls of the top and bottom of the fire channel rock mouth (2); a lower nozzle (502) facing the inner combustion support frame (201) is provided on the inner wall of the lifting cylinder frame (5); A fire channel combustion port (101) connected to the bottom inner wall of the fire channel rock port (2) is provided at the center of the top of the extended furnace body (1), a compensation box (4) is provided on one side of the top of the extended furnace body (1), a gas main pipe (401) connected to the extended furnace body (1) is provided on the end face of the compensation box (4), and a circulation box (3) is provided side by side on the side of the compensation box (4).

2. A coke oven side flue temperature compensation heating device according to claim 1, characterized in that: The top of one end of the extended furnace body (1) is provided with a plurality of groups of air holes connected to the circulation box (3), the top of one side of the extended furnace body (1) is provided with an air inlet valve (103) sleeved with a gas main (401), and the top inner wall of the fire channel combustion port (101) is provided with a ventilation ring groove (102) close to the inner combustion support frame (201).

3. The coke oven side flue temperature compensation heating device according to claim 1, characterized in that: A compensation extension pipe (402) flange-connected to the gas main pipe (401) is provided inside the compensation box (4), and the compensation extension pipe (402) is connected to the outer wall of one end of the flue rock opening (2).

4. The coke oven side flue temperature compensation heating device according to claim 1, characterized in that: A box cover (301) is provided on the outer wall of one end of the circulation box (3), and a circulation fan (302) and a heat storage box (303) are arranged side by side inside the circulation box (3).

5. The coke oven side flue temperature compensation heating device according to claim 1, characterized in that: A U-shaped groove is provided on the inner wall at the top of the fire channel rock mouth (2), and a lifting cylinder frame (5) is embedded in the U-shaped groove. A heat-insulating flow pipe (203) close to the U-shaped groove and the inner combustion support frame (201) is provided on the inner wall at the top and bottom of the fire channel rock mouth (2), respectively. A plurality of groups of air diffusion holes (205) are provided inside the inner combustion support frame (201). A plurality of groups of support rods (206) arranged on the surface of the U-shaped groove are provided on the inner wall at the top of the fire channel rock mouth (2).

6. The coke oven side flue temperature compensation heating device according to claim 1, characterized in that: A crossbeam (501) is slidably sleeved between the tops of the adjacent lifting cylinder frames (5) on the same side, and a fastener connected to the lower nozzle (502) is provided at the bottom of the crossbeam (501).

7. A coke oven side flue temperature compensation heating method, using a coke oven side flue temperature compensation heating device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Coke oven operation: Damage to the combustion port and rock mouth area of the fire channel will cause air and gas problems, affecting the quality of coke and the furnace body, and increasing heat consumption; Coal return temperature compensation: Use the compensation extension pipe to transport gas, control the gas volume through the regulating valve, and cooperate with the lifting cylinder to adjust the lower nozzle to increase the gas injection volume and increase the temperature; Oxygen-enhancing combustion support: The internal combustion support frame uses a circulating fan to introduce external oxygen-containing air to construct a combustion support area to compensate for the temperature drop in the rock mouth area of the fire channel; The circulating fan (302) is also used to extract part of the high-temperature air around the ventilation ring groove (102) and store it inside the heat storage box (303), and is used to perform heat exchange processing on the external air extracted by the circulating fan (302), so as to avoid a large temperature difference between the external air and the internal temperature of the fire channel rock mouth (2), which causes the injection of external air to further reduce the temperature. Oxygen supplementation and temperature increase: The circulating fan extracts high-temperature air and stores it in the temperature storage box, exchanging heat with the external air to avoid temperature drop caused by excessive temperature difference; Circulation temperature lock: The circulation fan sends the hot air from the temperature storage box to the upper and lower extraction pipes, reducing the temperature in the rock mouth area of the fire channel, slowing down the temperature loss in the furnace, and stabilizing the temperature in the furnace.

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