CN114437740A - Coke oven system and method for operating the same - Google Patents
Coke oven system and method for operating the same Download PDFInfo
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- CN114437740A CN114437740A CN202210030586.0A CN202210030586A CN114437740A CN 114437740 A CN114437740 A CN 114437740A CN 202210030586 A CN202210030586 A CN 202210030586A CN 114437740 A CN114437740 A CN 114437740A
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- flue gas
- coke oven
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- 239000000571 coke Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 207
- 239000003546 flue gas Substances 0.000 claims abstract description 207
- 238000011084 recovery Methods 0.000 claims abstract description 55
- 239000002918 waste heat Substances 0.000 claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims description 54
- 239000000779 smoke Substances 0.000 claims description 27
- 238000004939 coking Methods 0.000 claims description 20
- 238000003763 carbonization Methods 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 239000003245 coal Substances 0.000 claims description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 abstract description 18
- 239000001301 oxygen Substances 0.000 abstract description 18
- 238000005496 tempering Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 8
- 238000004064 recycling Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/10—Regulating and controlling the combustion
- C10B21/18—Recirculating the flue gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/08—Heating of coke ovens with combustible gases by applying special heating gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Coke Industry (AREA)
Abstract
The disclosed embodiment provides a coke oven system and an operation method thereof, wherein the coke oven system comprises: the coke oven system of the embodiment of the disclosure recovers the waste heat of the flue gas generated by the coke oven through the waste heat recovery system, and utilizes the flue gas recovery system to introduce part of the low-temperature flue gas after the waste heat recovery into the second air channel through the flue gas balance channel, so that the content of oxygen in combustion air can be reduced.
Description
Technical Field
The disclosure relates to the technical field of coking and flue gas treatment, in particular to a coke oven system and an operation method thereof.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
The heat recovery coke oven comprises a furnace top area, a carbonization chamber, a combustion chamber, a heat exchange chamber, a flue and other main structures, coking coal is combusted, heat is transferred, heated and dry distilled into coke in the carbonization chamber, high-temperature raw coke gas is generated, the high-temperature raw coke gas and combustion-supporting air are combusted in the combustion chamber to generate high-temperature coke oven smoke, and the high-temperature coke oven smoke exchanges heat with the combustion-supporting air through a heat exchange unit and is discharged through the flue. In the coking process, because the generation amount of the raw gas is changed, the phenomenon of overhigh local temperature of the coke oven body is easy to occur, and the safety and the stability of a coke oven system are further influenced.
Disclosure of Invention
The embodiment of the disclosure aims to provide a coke oven system and an operation method thereof, so as to realize uniform heating of a coke oven body and improve the safety and stability of the coke oven system. The specific technical scheme is as follows:
in a first aspect, embodiments of the present disclosure provide a coke oven system, including:
the coke oven comprises a carbonization chamber, a combustion chamber, a heat exchange chamber, a flue and a flue gas balance channel, wherein the combustion chamber comprises a vertical flue, a gas channel and a first air channel;
the waste heat recovery system is communicated with the flue and is used for recovering the heat of the flue gas exhausted by the flue;
the flue gas is returned to the stove system, flue gas is returned the stove system and is connected waste heat recovery system with the flue gas balancing way, flue gas is returned stove system and is used for letting in partial flue gas after waste heat recovery system handles the flue gas balancing way, the flue gas balancing way is used for returning the flue gas in the stove system to the even distribution of second air way.
According to the coke oven system of the embodiment of the disclosure, coking coal is dry distilled in the carbonization chamber to obtain raw coke gas and coke, the raw coke gas enters the vertical flue through the gas channel of the combustion chamber, the flue gas entering the second air channel from the flue gas balance channel is mixed with combustion-supporting air in the second air channel, and enters the vertical flue through the first air channel of the combustion chamber after being preheated, in the vertical flue, the mixed combustion-supporting air and flue gas are combusted with raw coke oven gas, the heat generated by combustion is used for providing heat for coking in the coking chamber, the flue gas generated by combustion enters the flue gas channel of the heat exchange chamber to preheat the combustion-supporting air and the flue gas in the second air channel, the flue gas after heat exchange enters the waste heat recovery system through the flue, the waste heat recovery system recovers the waste heat of the flue gas, and the flue gas recycling system introduces part of the flue gas after waste heat recovery into the flue gas balance channel and uniformly enters the second air channel through the flue gas balance channel. In the embodiment of the disclosure, the waste heat of the flue gas generated by the coke oven is recovered by the waste heat recovery system, and part of the low-temperature flue gas after the waste heat recovery is introduced into the second air channel through the flue gas balance channel by the flue gas return system, so that the content of oxygen in the combustion-supporting air can be reduced, and thus, when the amount of raw gas in the carbonization chamber is increased, less oxygen and raw gas can be combusted, thereby avoiding the phenomenon that the local temperature of the coke oven body is too high, stabilizing the combustion state in the vertical flue of the coke oven, improving the heating uniformity of the coke oven, and further improving the safety and stability of the coke oven system.
In addition, the coke oven system according to the embodiment of the disclosure can also have the following additional technical characteristics:
in some embodiments of this disclosure, flue gas tempering system includes the tempering pipeline, the tempering pipeline intercommunication waste heat recovery system with flue gas balance way, be provided with flow metering device and governing valve on the tempering pipeline, flow metering device is used for measuring flue gas flow in the tempering pipeline, the governing valve is used for adjusting the flow of the flue gas that passes through in the tempering pipeline.
In some embodiments of the disclosure, the coke oven system further comprises a central control system and a first temperature sensor, the first temperature sensor is disposed in the combustion chamber, the first temperature sensor is used for measuring the temperature in the combustion chamber, the central control system is electrically connected with the first temperature sensor, the flow metering device and the regulating valve, and the central control system is used for regulating the opening degree of the regulating valve according to the temperature data measured by the first temperature sensor and the flow data measured by the flow metering device.
In some embodiments of the present disclosure, the tempering pipe is further provided with a pressure transmitter and a second temperature sensor, the pressure transmitter is used for measuring pressure data of flue gas passing through the tempering pipe, the second temperature sensor is used for measuring temperature data of flue gas passing through the tempering pipe, and the central control system is electrically connected with the pressure transmitter and the second temperature sensor respectively.
In some embodiments of the present disclosure, the waste heat recovery system includes boiler system, draught fan, flue gas processing apparatus and chimney that connect gradually, the boiler system with the flue intercommunication, flue gas system of returning to the stove with flue gas processing apparatus intercommunication.
In some embodiments of the present disclosure, the flue gas treatment device employs a desulfurization device.
In some embodiments of the present disclosure, the number of the flue gas balance ducts is 2, one of the flue gas balance ducts is configured to distribute flue gas to the second air duct of the coke oven side, and the other of the flue gas balance ducts is configured to distribute flue gas to the second air duct of the coke oven side.
In some embodiments of the present disclosure, the second air channel and the flue gas channel within the heat exchange chamber are distributed adjacent to each other.
In some embodiments of the present disclosure, the coke oven further comprises a roof zone comprising a sight hole and a decarburizing hole, the sight hole being in communication with the vertical flue, the decarburizing hole being in communication with the carbonization chamber.
In a second aspect, embodiments of the present disclosure provide a method of operating a coke oven system, implemented using the coke oven system of any one of the first aspects, the method of operating the coke oven system comprising:
introducing coking coal into a carbonization chamber to obtain raw coke and raw gas, and introducing the raw coke into a vertical flue through a gas channel;
introducing combustion-supporting air into a second air channel of the heat exchange chamber, so that the combustion-supporting air is mixed with the flue gas introduced into the second air channel by the flue gas balance channel through the flue gas return system and is preheated;
the mixed combustion-supporting air, the mixed flue gas and the raw coke oven gas are combusted in the vertical flue to provide heat for coking in the carbonization chamber, and the generated flue gas enters the flue gas channel of the heat exchange chamber;
the mixed combustion-supporting air and the flue gas are preheated by the flue gas entering a flue gas channel of the heat exchange chamber;
making the flue discharge flue gas;
enabling the waste heat recovery system to recover the heat of the flue gas exhausted by the flue;
and the smoke gas returning system leads part of smoke gas passing through the waste heat recovery system into the smoke gas balance channel, so that the smoke gas in the smoke gas balance channel is uniformly distributed into the second air channel.
According to the operation method of the coke oven system disclosed by the embodiment of the disclosure, the waste heat of the flue gas generated by the coke oven is recovered through the waste heat recovery system, and the flue gas recovery system is utilized to introduce part of the low-temperature flue gas after waste heat recovery into the second air channel through the flue gas balance channel, so that the content of oxygen in combustion-supporting air can be reduced, and thus when the generation amount of raw gas in the carbonization chamber is increased, less oxygen and raw gas can be combusted, so that the phenomenon that the local temperature of the coke oven body is too high is avoided, the combustion state in the vertical flue of the coke oven is stabilized, the heating uniformity of the coke oven is improved, and the safety and the stability of the coke oven system are further improved.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a schematic illustration of a coke oven system according to an embodiment of the disclosure;
FIG. 2 is a schematic structural diagram of a coke oven in a coke oven system according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments derived from the present application by a person of ordinary skill in the art based on the embodiments in the present disclosure are within the scope of protection of the present disclosure.
As shown in fig. 1 and 2, an embodiment of a first aspect of the present application provides a coke oven system comprising: the coke oven comprises a coke oven 1, a waste heat recovery system 2 and a flue gas reburning system 3, specifically, the coke oven 1 comprises a carbonization chamber 11, a combustion chamber 12, a heat exchange chamber 13, a flue 14 and a flue gas balance channel 15, the combustion chamber 12 comprises a vertical flue 121, a gas channel 122 and a first air channel 123, the heat exchange chamber 13 comprises a flue gas channel 131 and a second air channel 132, the gas channel 122 is communicated with the vertical flue 121 and the carbonization chamber 11, the first air channel 123 is communicated with the vertical flue 121 and the second air channel 132, the flue gas channel 131 is communicated with the vertical flue 121 and the flue 14, and the flue gas balance channel 15 is communicated with the second air channel 132 of the heat exchange chamber 13; the waste heat recovery system 2 is communicated with the flue 14, and the waste heat recovery system 2 is used for recovering the heat of the flue gas discharged by the flue 14; the flue gas tempering system 3 is connected with the waste heat recovery system 2 and the flue gas balance passage 15, the flue gas tempering system 3 is used for introducing part of the flue gas processed by the waste heat recovery system 2 into the flue gas balance passage 15, and the flue gas balance passage 15 is used for uniformly distributing the flue gas in the flue gas tempering system 3 to the second air passage 132.
According to the coke oven system of the embodiment of the disclosure, coking coal is dry distilled in the coking chamber 11 to obtain raw gas and coke, the raw gas enters the vertical flue 121 through the gas channel 122 of the combustion chamber 12, the flue gas entering the second air channel 132 from the flue gas balance channel 15 is mixed with combustion-supporting air in the second air channel 132, the raw gas enters the vertical flue 121 through the first air channel 123 of the combustion chamber 12 after being preheated, the mixed combustion-supporting air and flue gas are combusted with the raw gas in the vertical flue 121, the heat generated by combustion is used for providing heat for coking in the coking chamber 11, the flue gas generated by combustion enters the flue gas channel 131 of the heat exchange chamber 13 to preheat the combustion-supporting air and flue gas in the second air channel 132, the flue gas after heat exchange enters the waste heat recovery system 2 through the flue 14, the waste heat of the flue gas is recovered by the waste heat recovery system 2, the flue gas recycling system 3 introduces part of the flue gas after waste heat recovery into the flue gas balance channel 15, and uniformly enters the second air passage 132 through the flue gas balance passage 15. In the embodiment of the disclosure, the waste heat of the flue gas generated by the coke oven is recovered by the waste heat recovery system 2, and part of the low-temperature flue gas after the waste heat recovery is introduced into the second air channel 132 through the flue gas balance channel 15 by the flue gas return system 3, so that the content of oxygen in the combustion air can be reduced, and thus, when the amount of raw gas generated in the carbonization chamber is increased, less oxygen and raw gas can be combusted, thereby avoiding the phenomenon that the local temperature of the coke oven body is too high, stabilizing the combustion state in the vertical flue 121 of the coke oven, improving the uniformity of heating the coke oven, and further improving the safety and stability of the coke oven system.
In some embodiments of the present disclosure, as shown in fig. 2, the flue gas balance channel 15 is disposed perpendicular to the second air channel 132, a plurality of distribution openings 151 are disposed above the flue gas balance channel 15, and after entering the flue gas balance channel 15, the flue gas enters the second air channel 132 through the distribution openings 151 to be mixed with the combustion air.
In some embodiments of the present disclosure, the flue gas recycling system 3 includes a recycling pipe 31, the recycling pipe 31 communicates the waste heat recovery system 2 and the flue gas balance passage 15, and the recycling pipe 31 is provided with a flow metering device (not shown) and a regulating valve (not shown). Flue gas exhausted from the flue enters a return pipe 31 after being subjected to waste heat recovery through the waste heat recovery system 2, and enters a flue gas balance passage 15 through the return pipe 31, a flow metering device arranged on the return pipe 31 is used for measuring flow data passing through the return pipe 31, an adjusting valve is used for adjusting the flow of the flue gas passing through the return pipe 31, and the opening of the adjusting valve is adjusted according to the flow data measured by the flow metering device, so that the flow of the flue gas passing through the return pipe 31 is controlled, the amount of the flue gas entering the flue gas balance passage 15 is further controlled, and the content of oxygen in combustion-supporting air is further controlled, so that the coke oven body is uniformly heated, and the safety and the stability of the coke oven system are improved.
In some embodiments of the present disclosure, the flow metering device may be a flow meter and the regulating valve may be an electrically-operated regulating valve.
In some embodiments of the present disclosure, the coke oven system further includes a central control system (not shown in the drawings) and a first temperature sensor (not shown in the drawings), the first temperature sensor is disposed in the combustion chamber 12 and is configured to measure temperature data in the combustion chamber 12, the measured temperature data can be used to characterize the amount of the generated crude gas, such as an increase in temperature, which proves that the generated amount of the crude gas is relatively large at this time and the temperature is relatively low at this time, which proves that the generated amount of the crude gas is relatively small at this time, the central control system is electrically connected to the first temperature sensor, the flow metering device and the regulating valve, the central control system is configured to adjust the opening of the regulating valve according to the temperature data measured by the first temperature sensor and the flow data measured by the flow metering device and passed through the return pipe 31, so as to control the amount of the flue gas entering the flue gas balance duct 15 and further control the content of oxygen in the combustion air, thereby realizing the uniform heating of the coke oven body and improving the safety and the stability of the coke oven system.
In operation, for example, when the temperature measured by the first temperature sensor is higher, it is proved that the generated amount of the raw coke oven gas is more at this time, the opening degree of the regulating valve is controlled to be increased through the central control system according to the temperature data and the flow data so as to introduce more flue gas to be mixed with the combustion-supporting air, so as to reduce the content of oxygen in the combustion-supporting air, so that less oxygen and the raw coke oven gas are combusted to reduce the temperature in the combustion chamber 12, and the phenomenon that the local temperature of the coke oven body is too high is avoided; when the temperature measured by the first temperature sensor is lower, the generation amount of the raw coke oven gas is proved to be less at the moment, the opening degree of the regulating valve is controlled to be smaller through the central control system according to the temperature data and the flow data so as to introduce less flue gas to be mixed with combustion-supporting air, so that the content of oxygen in the combustion-supporting air is improved, more oxygen and the raw coke oven gas are combusted to improve the temperature in the combustion chamber 12, and the phenomenon that the temperature of the coke oven body is too low is avoided. Therefore, the amount of the flue gas entering the flue gas balance channel 15 is controlled through the central control system, the first temperature sensor, the flow metering device and the regulating valve, and the content of oxygen in combustion air is further controlled, so that the coke oven body is uniformly heated, and the safety and the stability of the coke oven system are improved.
In some embodiments of the present disclosure, the first temperature sensor may employ an infrared thermometer.
In some embodiments of the present disclosure, the first temperature sensor may be specifically disposed in the vertical flue 121 in the combustion chamber 12, because the mixed gas of combustion air and flue gas and the raw gas are combusted in the vertical flue 121, the temperature in the combustion chamber 12 can be more accurately measured by disposing the first temperature sensor in the vertical flue 121, so that the central control system can adjust the flow rate of the flue gas in the return pipe 31 according to the temperature data.
In some embodiments of the present disclosure, a pressure transmitter (not shown) and a second temperature sensor (not shown) are further disposed on the return pipe 31. The central control system is electrically connected with the pressure transmitter and the second temperature sensor respectively, the pressure transmitter is used for measuring pressure data of smoke passing through the interior of the return pipe 31, and the second temperature sensor is used for measuring temperature data of smoke passing through the interior of the return pipe 31. The smoke passing through the return pipe 31 is gas under non-standard atmospheric pressure, the temperature and the pressure of the smoke are different from the standard atmospheric pressure, the flow data measured by the flow metering device is flow data under the standard atmospheric pressure, compensation calculation is carried out on the flow data by the pressure data and the temperature data of the smoke to obtain corrected flow data, the corrected flow data is more accurate flow data, and the central control system adjusts the opening of the regulating valve according to the temperature data measured by the first temperature sensor and the corrected flow data, so that the smoke entering the smoke balance passage 15 is more accurately controlled, the oxygen content in combustion air is further controlled, uniform heating of a coke oven body is realized, and the safety and the stability of the coke oven system are improved.
In some embodiments of the present disclosure, a flow rate metering device, a pressure transmitter and a second temperature sensor may be sequentially disposed on the return pipe 31 along the flow direction of the flue gas.
In some embodiments of the present disclosure, the second temperature sensor may employ an infrared thermometer.
In some embodiments of the present disclosure, the waste heat recovery system 2 includes a boiler system 21, an induced draft fan 22, a flue gas treatment device 23, and a chimney 24, which are connected in sequence, the boiler system 21 is communicated with the flue 14, and the flue gas recovery system 3 is communicated with the flue gas treatment device 23. The flue gas flowing out of the flue 14 firstly passes through the boiler system 21 for waste heat recovery, and then enters the induced draft fan 22, the induced draft fan 22 sends the flue gas subjected to waste heat recovery into the flue gas treatment device 23 for purification treatment, a part of the flue gas subjected to purification treatment enters the flue gas balance passage 15 through the flue gas returning system 3, and a part of the flue gas is discharged through the chimney 24.
In some embodiments of the present disclosure, the boiler system 21 may be a waste heat boiler.
In some embodiments of the present disclosure, the flue gas treatment device 23 is a desulfurization device, the induced draft fan 22 sends the flue gas subjected to waste heat recovery into the desulfurization device for desulfurization, a part of the flue gas subjected to desulfurization enters the flue gas balance duct 15 through the flue gas return system 3, and a part of the flue gas is discharged through the chimney 24.
In some embodiments of the present disclosure, the number of the flue gas balance ducts 15 is 2, one flue gas balance duct 15 is configured to distribute flue gas to the second air duct 132 on the coke oven 1 side, and the other flue gas balance duct 15 is configured to distribute flue gas to the second air duct 132 on the coke oven 1 side. As shown in fig. 2, the heat exchange chamber 13 of the coke oven 1 includes 8 second air channels 132, which communicate the coke oven 1 side to the coke side, one flue gas balance channel 15 distributes flue gas uniformly to the 8 second air channels 132 of the coke oven 1 side, and the other flue gas balance channel 15 distributes flue gas uniformly to the 8 second air channels 132 of the coke oven 1 coke side, so that the flue gas balance channel 15 can distribute flue gas uniformly to the 8 second air channels 132, and each second air channel 132 simultaneously feeds flue gas from both sides of the coke oven 1 side and the coke side, so that flue gas inside each second air channel 132 is also uniformly fed, which is beneficial to uniformly mixing flue gas and combustion air, thereby uniformly controlling the oxygen content in the combustion air, further realizing uniform heating of the coke oven body, and improving the safety and stability of the coke oven system.
In some embodiments of the present disclosure, the second air channel 132 and the flue gas channel 131 are distributed adjacent to each other in the heat exchange chamber 13. Wherein the number of the flue gas channels 131 is one more than the number of the second air channels 132. As shown in FIG. 2, the coke oven 1 comprises 8 second air channels 132 and 9 flue gas channels 131, and the combustion air and the flue gas in the second air channels 132 enter the first air channel 123 after being preheated by the adjacent 2 flue gas channels 131, and then enter the vertical flue 121 to be combusted with the raw coke oven gas. The present application does not limit the number of the second air passages 132 and the number of the flue gas passages 131 as long as the number of the flue gas passages 131 is one more than the number of the second air passages 132.
In some embodiments of the present disclosure, the coke oven 1 further comprises a roof section 16, the roof section 16 comprises a fire hole 161 and a coal removal hole 162, the fire hole 161 is communicated with the vertical flue 121, and the coal removal hole 162 is communicated with the carbonization chamber 11. During work, a worker can also judge the temperature in the vertical flue 121 by sensing the air flow speed of the observation hole 161, so as to control the amount of the flue gas introduced into the flue gas balance channel 15; the carbon removing holes 162 are also called smoke guide holes, the smoke guide holes can be connected with the smoke guide vehicle through pipelines, smoke can be generated in the coking chamber 11 during coking coal dry distillation, and the smoke can enter the pipelines of the smoke guide vehicle through the smoke guide holes, so that the smoke is prevented from being discharged into the air to pollute the environment.
An embodiment of the second aspect of the present application provides an operation method of a coke oven system based on the first aspect, which includes:
introducing coking coal into the coking chamber 11 to obtain raw coke and raw gas, and introducing the raw coke into the vertical flue 121 through the gas channel 122;
introducing combustion-supporting air into the second air channel 132 of the heat exchange chamber 13, so that the combustion-supporting air is mixed with the flue gas introduced into the second air channel 132 by the flue gas balance channel 15 and preheated by the flue gas return system 3;
the mixed combustion-supporting air, the flue gas and the raw coke oven gas are combusted in the vertical flue 121 to provide heat for coking in the coking chamber 11, and the generated flue gas enters the flue 131 of the heat exchange chamber 13;
the mixed combustion-supporting air and flue gas are preheated by the flue gas entering the flue gas channel 131 of the heat exchange chamber 13;
allowing the flue 14 to exhaust fumes;
the waste heat recovery system 2 recovers the heat of the flue gas discharged from the flue 14;
the flue gas returning system 3 leads part of the flue gas passing through the waste heat recovery system 2 into the flue gas balance channel 15, so that the flue gas in the flue gas balance channel 15 is uniformly distributed into the second air channel 132.
According to the operation method of the coke oven system disclosed by the embodiment of the disclosure, the waste heat of the flue gas generated by the coke oven is recovered by the waste heat recovery system 2, and part of the low-temperature flue gas after the waste heat recovery is introduced into the second air channel 132 through the flue gas balance channel 15 by the flue gas return system 3, so that the content of oxygen in combustion-supporting air can be reduced, and thus when the generation amount of the crude gas in the carbonization chamber 11 is increased, less oxygen and the crude gas can be combusted, so that the phenomenon that the local temperature of the coke oven body is too high is avoided, the combustion state in the vertical flue 121 of the coke oven is stabilized, the heating uniformity of the coke oven is improved, and the safety and the stability of the coke oven system are further improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments of the present disclosure are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure are included in the scope of protection of the present disclosure.
Claims (10)
1. A coke oven system, comprising:
the coke oven comprises a carbonization chamber, a combustion chamber, a heat exchange chamber, a flue and a flue gas balance channel, wherein the combustion chamber comprises a vertical flue, a gas channel and a first air channel;
the waste heat recovery system is communicated with the flue and is used for recovering the heat of the flue gas exhausted by the flue;
the flue gas is returned to the stove system, flue gas is returned the stove system and is connected waste heat recovery system with the flue gas balancing way, flue gas is returned stove system and is used for letting in partial flue gas after waste heat recovery system handles the flue gas balancing way, the flue gas balancing way is used for returning the flue gas in the stove system to the even distribution of second air way.
2. The coke oven system of claim 1, wherein the flue gas recovery system comprises a recovery duct, the recovery duct communicates with the residual heat recovery system and the flue gas balance duct, a flow metering device and an adjusting valve are arranged on the recovery duct, the flow metering device is used for measuring the flow of flue gas in the recovery duct, and the adjusting valve is used for adjusting the flow of flue gas passing through the recovery duct.
3. The coke oven system of claim 2, further comprising a central control system and a first temperature sensor, wherein the first temperature sensor is disposed within the combustion chamber, the first temperature sensor is configured to measure a temperature within the combustion chamber, the central control system is electrically connected to the first temperature sensor, the flow metering device, and the regulating valve, and the central control system is configured to adjust an opening of the regulating valve according to temperature data measured by the first temperature sensor and flow data measured by the flow metering device.
4. The coke oven system of claim 3, wherein the return pipe is further provided with a pressure transmitter and a second temperature sensor, the pressure transmitter is used for measuring pressure data of the flue gas passing through the return pipe, the second temperature sensor is used for measuring temperature data of the flue gas passing through the return pipe, and the central control system is electrically connected with the pressure transmitter and the second temperature sensor respectively.
5. The coke oven system of claim 1, wherein the waste heat recovery system comprises a boiler system, an induced draft fan, a flue gas treatment device and a chimney, which are connected in sequence, wherein the boiler system is communicated with the flue, and the flue gas recovery system is communicated with the flue gas treatment device.
6. The coke oven system of claim 5, wherein the flue gas treatment device comprises a desulfurization device.
7. The coke oven system of claim 1, wherein the number of said flue gas balance ducts is 2, one of said flue gas balance ducts being configured to distribute flue gas to said secondary air duct on the coke oven side, the other of said flue gas balance ducts being configured to distribute flue gas to said secondary air duct on the coke oven side.
8. The coke oven system of claim 1, wherein the second air duct and the flue gas duct within the heat exchange chamber are distributed adjacent to each other.
9. The coke oven system of claim 1, further comprising a roof section, the roof section comprising a sight hole and a de-char hole, the sight hole communicating with the vertical flue, the de-char hole communicating with the carbonization chamber.
10. A method of operating a coke oven system according to any one of claims 1 to 9, comprising:
introducing coking coal into a carbonization chamber to obtain raw coke and raw gas, and introducing the raw coke into a vertical flue through a gas channel;
introducing combustion-supporting air into a second air channel of the heat exchange chamber, so that the combustion-supporting air is mixed with the flue gas introduced into the second air channel by the flue gas balance channel through the flue gas return system and is preheated;
the mixed combustion-supporting air, the mixed flue gas and the raw coke oven gas are combusted in the vertical flue to provide heat for coking in the carbonization chamber, and the generated flue gas enters the flue gas channel of the heat exchange chamber;
the mixed combustion-supporting air and the flue gas are preheated by the flue gas entering a flue gas channel of the heat exchange chamber;
making the flue discharge flue gas;
enabling the waste heat recovery system to recover the heat of the flue gas exhausted by the flue;
and the smoke gas returning system leads part of smoke gas passing through the waste heat recovery system into the smoke gas balance channel, so that the smoke gas in the smoke gas balance channel is uniformly distributed into the second air channel.
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| CN114806606A (en) * | 2022-06-06 | 2022-07-29 | 华泰永创(北京)科技股份有限公司 | Oven system and operation method thereof |
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