CN113862001A - Closed coke oven environment control method and system - Google Patents
Closed coke oven environment control method and system Download PDFInfo
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- CN113862001A CN113862001A CN202010614926.5A CN202010614926A CN113862001A CN 113862001 A CN113862001 A CN 113862001A CN 202010614926 A CN202010614926 A CN 202010614926A CN 113862001 A CN113862001 A CN 113862001A
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Classifications
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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
- C10B25/00—Doors or closures for coke ovens
-
- 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
- C10B33/00—Discharging devices; Coke guides
- C10B33/08—Pushers, e.g. rams
-
- 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
- C10B33/00—Discharging devices; Coke guides
- C10B33/14—Coke guides
-
- 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
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
-
- 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
- C10B43/00—Preventing or removing incrustations
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
A method and a system for controlling the environment of a closed coke oven comprise the following steps: 1) the method comprises the following steps of (1) dust suppression and cooling by zoning and grading of micro mist, 2) full sealing in front of a furnace and purification and exhaust of flue gas, and 3) monitoring of gas in a closed space and control of a flue gas trapping fan. The invention greatly improves the environment of the enclosed space of the coke oven with a cover by implementing the technologies of enclosed partition, micro-fog dust suppression and cooling, front-of-oven enclosure and flue gas purification, gas component detection, trapped air volume regulation and the like, and reduces the emission of SO (sulfur oxide) generated by dust removal at the coke side of the coke oven2And the discharge risk is avoided, the unorganized discharge of VOCs is avoided, and the requirements of safety, energy conservation and environmental protection of the top of the coke oven are finally met.
Description
Technical Field
The invention belongs to the technical field of coke oven environment protection, and particularly relates to a method and a system for controlling the environment of a closed coke oven.
Background
The coke oven is built by refractory materials and comprises an oven top, a carbonization chamber (combustion chamber), an inclined way, a regenerative chamber, a horizontal flue, an oven bed plate and a basement from top to bottom. The coke pushing operation of the coke oven is cooperatively implemented by four locomotives of the coke oven, wherein a coal charging car runs along a fixed track on the oven top of the coke oven, a coke pushing car runs along a fixed track on the coke oven side, a motor vehicle runs along a fixed track on the coke side of the coke oven, and an electric car (coke quenching car) runs on a coke side tramway. Most of modern coke ovens are of multi-chamber structures, and coke oven locomotives continuously carry out coke pushing and coal loading operation of each carbonization chamber every 8-13 minutes according to an operation plan.
The coke oven smelting is a process of air-isolated high-temperature carbonization of coking coal in a coke oven carbonization chamber, and the temperature in a combustion chamber is usually up to 1200-. The coke oven consumes a large amount of coal gas during heating, and the generated hot waste gas is discharged through the horizontal flue, the branch flue, the main flue and the chimney. In the production process of the coke oven, the surface temperature of the whole coke oven body is high, the heat dissipation capacity is large, and generally, the heat dissipation capacity of the coke oven body accounts for more than 13 percent of the total heat consumption capacity of the coke oven. Taking a currently mainstream coke oven with 7 meters as an example, in the dry distillation process of the coke oven, the actual measurement results show that the refractory material part on the top surface of the coke oven exceeds 80 ℃, the temperature of a coal charging port cover exceeds 300 ℃, the temperature of a machine coke side oven door body exceeds 60 ℃, and the temperature of an oven bed plate at the top of a basement of the coke oven exceeds 50 ℃. During the coke pushing operation, the temperature of each part is higher, the temperature of the space of the coal feeding port opened on the furnace top, the furnace door opened on the machine coke side and the like exceeds 800 ℃, and the residual raw coke gas is mixed with air and then combusted after the rising pipe is opened, and the temperature is more than 1200 ℃. As mentioned above, the high temperature during the coke oven smelting process, especially during the coke pushing operation, seriously jeopardizes the safe operation of the enclosed coke oven body.
The coke oven smelting process continuously generates a large amount of raw coke oven gas, the raw coke oven gas is led out by a gas exhaust and delivery fan from a carbonization chamber through an ascending pipe, a bridge pipe, a gas collecting pipe, an air suction pipe and the like, and the parts except the air suction pipe are always in a positive pressure state, so that air is prevented from being sucked into a pipeline and mixed with the raw coke oven gas, and the explosion risk is eliminated. In the production process, raw coke oven gas often escapes from non-tight parts such as coke side oven doors, oven tops, ascending pipes, bridge pipes, gas collecting pipes and the like, and multi-component volatile organic compounds pollute the surrounding environment. When pushing coke, the coke side furnace door is opened, and the residual gas in the furnace is combusted along with the escape of hot air flowTo SO2Pollutants such as NOx and the like, residual tar and asphalt at the positions of the furnace door and the like contact with air, a large amount of volatile organic compounds are discharged under the action of a high-temperature furnace door brick, and raw coke oven gas also escapes in the coal feeding process of the carbonization chamber. The raw gas mainly comprises water vapor, tar, crude benzene, ammonia, hydrogen sulfide, cyanide and the like, and even if the raw gas is fully combusted, a large amount of SO can be generated2、NOx、NH3And the like, and seriously pollutes the environment. As mentioned above, the raw coke oven gas is dissipated during the coke oven smelting process, especially during the coke pushing operation, which seriously jeopardizes the safe operation of the enclosed coke oven body.
China promotes the adjustment and optimization of industrial structures, promotes the green development of industry, promotes the upgrading and reconstruction of pollution control in key industries, clearly requires sulfur dioxide, nitrogen oxides, particulate matters and Volatile Organic Compounds (VOCs) in key areas to comprehensively execute special emission limit values of atmospheric pollutants, promotes the implementation of ultralow emission reconstruction in industries such as steel and the like, implements furnace body covering and sealing in a coke oven in a city built-up area of the key areas, and collects and treats waste gas.
In conclusion, because of the structure and production characteristics of the existing coke oven, both in the smelting process and in the coke pushing operation, high temperature, heat dissipation and raw gas and gas combustion can be generated, so that the environment is greatly influenced, the coke oven is covered and sealed, hot smoke, high-temperature radiation, leaked raw gas and raw gas combustion products and the like are converted into a shed accumulation state from an open-air emission state, and very large safety and environmental risks are generated in the closed space of the coke oven, so that the problem which needs to be solved in the covered and sealed coke oven body is solved.
In order to realize energy conservation and emission reduction of the coke oven, related technologies are continuously developed in recent years, at present, technical measures for reducing unorganized emission such as ascending pipe waste heat recovery, energy-saving furnace covers, prefabricated block furnace doors and the like are mainly applied, pressure of a carbonization chamber is monotonous, raw coke gas is reduced by an elastic knife edge furnace door, furnace cover slurry pouring and the like, dust removal is carried out on a machine coke side, totally-closed coal charging and the like are reduced, but the application of the related technologies cannot meet the higher requirement of the cover-added sealing of the coke oven body on the environment.
Currently, only a new casting pipe in turnip lake has an application case of closing a coke oven by covering. After the cover is closed, high-temperature radiation and heat dissipation are accumulated, heat cannot be discharged in time, and particularly, the temperature of the furnace top area is increased, the dissipated raw coke oven gas and raw coke oven gas combustion products such as coke pushing operation and furnace body leakage are accumulated in a closed space, so that the field operation environment is very poor.
Disclosure of Invention
The invention aims to provide a method and a system for controlling the environment of a closed coke oven, which are used for improving the environment in a closed space covered by a coke oven and reducing emission of SO (sulfur oxide) generated by dust removal at the coke side of the coke oven2The discharge risk is avoided, the unorganized discharge of VOCs after the coke oven is covered and sealed is avoided, and finally the requirements of safe energy conservation and environmental protection of the top of the coke oven are met
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention greatly improves the environment of the enclosed space of the coke oven with a cover by implementing the technologies of enclosed partition, micro-fog dust suppression and cooling, front-of-oven enclosure and flue gas purification, gas component detection, trapped air volume regulation and the like, and reduces the emission of SO (sulfur oxide) generated by dust removal at the coke side of the coke oven2And (4) emission risk, and the unorganized emission of VOCs is avoided.
Specifically, the method for controlling the environment of the closed coke oven comprises the following steps:
1) partitioned classified micro-fog dust suppression and cooling device
A coke oven sealing cover is arranged above the coke oven; the coke pusher and the coke barrier are respectively provided with a front micro-fog dust suppression and cooling device, and dust suppression and cooling points are respectively positioned above a furnace door of an operation furnace number and above a front head and tail coke treatment system of the furnace; setting temperature detection in a furnace front closed area, regulating and controlling the spraying amount of a spraying point of a micro-fog dust suppression and cooling system according to the temperature change of each area, starting a micro-fog dust suppression and cooling device before a furnace door is opened, and stopping the operation after the furnace door is closed;
2) full-closed furnace front and smoke purification discharge
The coke pusher and the coke guide are arranged in the front of the coke oven in a totally-enclosed structure, so that the front operation area is completely isolated from the two sides and the rear part, and the contact part of the enclosed area on the coke pusher and the coke oven is in a soft-sealing air-filling sealing structure; the top of the closed area in front of the furnace on the vehicle is provided with an air suction pipeline, and an air suction port is provided with an SO2A rotary atomizer is arranged above the detection device, and once SO is generated2High concentration, little fog during shutdownA dust cooling device, which is used for atomizing and spraying a desulfurizer to directly desulfurize;
3) gas monitoring and flue gas trapping fan control in enclosed space
The coke oven closed hood is internally provided with a smoke trapping air channel which is divided into three sub-flues corresponding to the machine side, the oven top and the coke side respectively, the three sub-flues are converged at the top and communicated with a smoke trapping collection air channel, and a baffle capable of adjusting the distribution of air volume among the three sub-flues is arranged in the smoke trapping collection air channel.
Preferably, a plurality of micro-fog dust suppression and cooling devices are arranged in front of the coke oven machine and the coke side oven, dust suppression and cooling points are respectively positioned at the lower part of the gas collecting pipe, temperature detection is arranged, and the operation of the micro-fog dust suppression and cooling devices in front of the oven is controlled according to the temperature change.
Preferably, the coke oven top is provided with a plurality of sets of micro-fog dust suppression and cooling devices, dust suppression and cooling points are respectively arranged on the ascending pipe platform at the oven top, the coke side bracket and two sides of the coal tower, and the devices intermittently spray dust suppression and cooling according to a program, or continuously spray dust suppression and cooling under the condition of ascending pipe installation in normal production or abnormal fault state according to a temperature detection device.
Preferably, a porous activated carbon adsorption material column is arranged in the air suction pipeline, and the flue gas in front of the furnace is directly sucked to a cloth bag dust removal system for dust removal and then is discharged after reaching the standard after being cooled, desulfurized and adsorbed by organic matters during coke pushing operation.
Preferably, the activated carbon material column is double-column switchable.
The invention discloses a closed coke oven environment control system, which comprises:
a coke oven closed cover is arranged above the coke oven, and a front micro-fog dust suppression and cooling device is arranged below the coke oven closed covers of the coke pushing cars and the coke blocking cars corresponding to the two sides of the coke oven and is respectively positioned above the oven door of the operating oven number and above a front head and tail coke processing system of the oven;
the temperature detection devices are arranged in the front closed area and the top of the coke oven;
the coke pusher and the coke guide are designed into a totally-enclosed structure in front of the coke oven, namely, a front operation area is completely isolated from the coke pusher and the coke guide on two sides and the rear part, and the contact part of the enclosed area on the coke pusher and the coke oven is of a soft-sealing air-entrapping structure;
the top of the closed area in front of the coke pusher and the coke guide is provided with an air suction pipeline, and the air suction port is provided with SO2The detection device is provided with a rotary atomizer above the detection device;
a smoke trapping air channel is arranged in the coke oven closed cover and is divided into three sub-flues which respectively correspond to the machine side, the oven top and the coke side; the three sub-flues are converged at the top and are communicated with a flue gas collecting air flue, and a baffle plate and a driving mechanism thereof which can adjust the distribution of air quantity among the three sub-flues are arranged in the flue gas collecting air flue;
the Volatile Organic Compounds (VOCs) detection sensors are respectively arranged on the periphery of the coke oven closed cover, the movable coke oven locomotive and a pipeline behind the smoke trapping fan;
a controller, a furnace front micro-fog dust suppression and cooling device, a temperature detection device and an SO2The detection device, the rotary atomizer, the baffle driving mechanism and the Volatile Organic Compounds (VOCs) detection sensor are respectively connected with the controller.
Preferably, a plurality of micro-fog dust suppression and cooling devices are arranged in front of the coke oven machine and the coke side and are respectively positioned at the lower part of the gas collecting pipe, and the temperature detection devices are arranged.
Preferably, the top of the coke oven is provided with a plurality of sets of micro-fog dust suppression and cooling devices, and dust suppression and cooling points are respectively arranged on the ascending pipe platform at the top of the coke oven, the coke side bracket and two sides of the coal tower.
Preferably, a porous activated carbon adsorbent column is arranged in the air suction pipeline.
In the method and the system for controlling the environment of the closed coke oven, the invention comprises the following steps:
(1) partitioned classified micro-fog dust suppression and cooling device
According to the production characteristics and heat source distribution of the coke oven, the micro-fog dust suppression and cooling devices with different specifications are configured in different areas, so that the smoke temperature in a closed space and the sedimentation of large particles in smoke are reduced, the paroxysmal hot smoke is controlled in a certain space, and the influence on the large environment in the closed space of the coke oven is reduced.
The coke pushing car and the coke guide car (coke guide car) are respectively provided with a front micro-mist dust suppression and cooling device, dust suppression and cooling points are respectively positioned above a furnace door of an operating furnace number and above a front and rear coke treatment system of the furnace, nozzles with different specifications and different numbers are arranged, temperature detection is arranged in a front closed area of the furnace, the spraying points and the particle size of atomized water of the micro-mist dust suppression and cooling system are regulated and controlled according to the temperature change of each area, the micro-mist dust suppression and cooling device is started before the furnace door is opened, and the furnace door is stopped after being closed.
As an improvement, N sets of micro-fog dust suppression and cooling devices are arranged in front of a coke side furnace of the coke side, dust suppression and cooling points are respectively positioned at the lower parts of gas collecting pipes, and the operation of the micro-fog dust suppression and cooling devices in front of the coke side furnace is controlled by a program or according to temperature change.
As an improvement, the top of the coke oven is provided with M sets of micro-fog dust suppression and cooling devices, dust suppression and cooling points can be respectively arranged on a riser platform on the top of the coke oven, a coke side bracket and two sides of a coal tower, the devices intermittently spray dust suppression and cooling according to a program, or the devices operate according to a temperature detection device, and can continuously spray dust suppression and cooling under the condition of normal production riser or abnormal fault.
(2) Full-closed furnace front and smoke purification discharge
The coke pusher and the coke guide (coke guide) are arranged in the front of the coke oven in a fully-closed structure, the front operation area of the coke oven is completely isolated from the two sides and the rear part, the left side plate and the right side plate adopt a double-layer structure, the contact part of the closed area on the coke oven and the coke oven is in a soft sealing air-filling sealing structure, and the disturbing influence of external wind on the front smoke is effectively inhibited.
The top of the closed area in front of the furnace on the vehicle is provided with an air suction pipeline, and an air suction port is provided with an SO2A rotary atomizer is arranged above the detection device, and once SO is generated2When the concentration is high, the micro-fog dust suppression and cooling system is stopped to operate, and the desulfurizer is sprayed in an atomizing mode to directly desulfurize.
As an improvement, a porous activated carbon adsorption material column is arranged in the air suction pipeline to adsorb organic volatile matters (VOCs) in the flue gas, and the activated carbon adsorption material column is in a double-column switchable type. During coke pushing operation, the front flue gas is directly pumped to a cloth bag dust removal system for dust removal after being cooled, desulfurized and adsorbed by organic matters, and then is discharged after reaching the standard.
(3) Gas monitoring and flue gas trapping fan control in enclosed space
According to the production characteristics of the coke oven and the coke pushing operation method, the coke oven closed cover is divided into three quadrants on the whole, and the corresponding flue gas trapping air duct is also divided into three sub-flues which are respectively a machine side, a furnace top and a coke side. The three sub-flues are converged at the top and communicated with the flue gas collecting air duct, and a baffle is arranged in the flue gas collecting air duct to adjust the distribution of air quantity among the three sub-flues. VOCs detection wireless sensors and detection data remote transmission terminals are respectively arranged on the periphery of the coke oven closed cover, the moving coke oven locomotive and the straight pipe section behind the flue gas trapping fan.
Establishing a coke oven area VOCs emission model, calculating the unorganized emission of VOCs by detecting wireless sensor data of VOCs arranged on a moving coke oven locomotive along the periphery of a coke oven closed cover, and calculating the organized emission of VOCs by detecting the wireless sensor data of the VOCs on a straight pipe section behind a flue gas trapping fan and the flue gas amount.
As an improvement, when the system senses that the emission concentration of VOCs wireless sensors at the periphery of a coke oven closed cover is increased, the rotating speed of a flue gas capture fan is adjusted, the flue gas capture amount in a coke oven closed space is increased, for example, the increase amplitude of the emission concentration of VOCs at each point of the coke oven side, the oven top and the coke side is inconsistent, a turning plate in a flue gas capture collection air duct can be adjusted, and the air volume distribution of the oven side, the oven top and the coke side is adjusted.
Utilize the dry fog atomizer to produce fine water smoke granule, partial water smoke makes the mutual bonding of dust granule, coalescence increase to subside under self action of gravity, partial water smoke evaporation heat absorption reduces the interior smoke temperature of enclosure, thereby controls paroxysmal hot flue gas in certain space, and great granule subsides rapidly in the enclosure in the hot flue gas. Collecting hot flue gas in front of furnace, atomizing and spraying desulfurizing agent (NaCO)3Etc.) with the SO in the flue gas2And combining to generate sulfide, and introducing the sulfide into a tail end dust remover along with the flue gas for purification treatment. VOCs monitoring is arranged around the closed space, VOCs content in the atmosphere is tracked on line, and the VOCs content is controlled by the capture fan in an interlocking manner, so that the captured smoke amount can be separately adjusted.
The difference between the invention and the prior art is as follows:
the existing technical measures for improving the coke oven environment mainly reduce heat dissipation and raw coke oven gas dissipation from the viewpoints of reducing the surface temperature of the oven body, improving the tightness of refractory brickworks of the coke oven and the like, and after the coke oven body is closed by a cover, the heat dissipation amount and the raw coke oven gas dissipation amount can be accumulated in a closed area of the coke oven, so that the huge flue gas capture amount after the closing is a serious test for the coke oven with huge volume.
According to the production characteristics of the coke oven, the invention implements partition covering and sealing, and is provided with relatively independent air passages which are adjustable; smoke temperature detection is configured in areas of the front furnace and the top furnace to control micro-mist dust suppression and temperature reduction in corresponding areas; totally closing the furnace front areas of the coke pushing car and the coke guide car (coke guide car) for operation, cooling, desulfurizing and purifying, feeding into a bag-type dust collector for dust removal, and discharging; and VOCs detection is carried out on a joint part between the closed space and the outside, and the air quantity collected by smoke is adjusted to avoid the unorganized emission. By implementing the technology, the environment in a closed space is improved, the air trapping amount is controlled, and the unorganized emission is avoided.
The invention has the beneficial effects that:
firstly, the flue gas is cooled by spraying from the source generated by hot flue gas, and the amount of flue gas to be collected and treated in the closed space of the coke oven is reduced;
secondly, by spraying at the source of hot flue gas, the gathering and enlargement of dust particles and natural sedimentation of large-particle dust are realized, and particulate matters in the flue gas are reduced at the source;
thirdly, spraying a desulfurizer in hot flue gas in front of the furnace to realize SO in the hot flue gas2The source treatment of the method realizes the ultralow emission standard of the tail ends of the two sets of dust collectors (the special emission limit value of atmospheric pollutants in the table 6 in the emission standard of pollutants for coking chemical industry and the clear requirement on the SO for coke pushing and dust removal) on the basis of not changing the existing configuration of machine side dust removal and coke pushing particle dust removal2<30mg/m3And the existing coke pushing and dust removing have no desulfurization function).
Drawings
FIG. 1 is a schematic structural diagram of a closed coke oven environment control system according to the present invention.
FIG. 2 is a logic diagram of the cooling and desulfurization of the flue gas in front of the furnace.
In the figure, the position of the upper end of the main shaft,
100-coke oven, 101-coke oven coke side platform, 102-coke oven side platform, 200-coke pusher, 300-coke guide, 400-coke oven ascending pipe, 401-ascending pipe diffused gas exhaust port;
1-a coke oven closed cover,
2-micro-fog dust suppression and cooling device (machine side), 2' -micro-fog dust suppression and cooling device (coke side),
3-temperature detection device (machine side furnace front), 3' -temperature detection device (coke side furnace front),
4-soft sealing air-filling sealing structure-closed vertical curtain (machine side),
4' -soft sealing air-entrapping sealing structure-closed vertical curtain (coke side),
5-suction pipe (machine side), 5 '-suction pipe (coke side), 51' -adsorption material column,
6. 6' -temperature detection device (furnace top),
7-SO2detection apparatus (machine side inlet port), 7' -SO2Detection device (coke side air suction)
8-rotary atomizer (machine side air inlet), 8' -rotary atomizer (coke side air inlet),
9-flue gas trapping air duct, 91, 92, 93-branch flue,
10-a flue gas collection duct for collecting flue gas,
11-a flue gas collecting main pipe and a fan,
12. 12' -micro-fog dust suppression and temperature reduction device (furnace top),
13-micro-fog dust suppression and temperature reduction device (machine side furnace front closed zone), 13' -micro-fog dust suppression and temperature reduction device (coke side furnace front closed zone),
14-Volatile Organic Compounds (VOCs) detection sensor.
Detailed Description
Referring to fig. 1, the closed coke oven environmental control system of the present invention comprises:
a coke oven closed cover 1 is arranged above the coke oven 100, and oven front micro-fog dust suppression and cooling devices 2 and 2' are arranged below the coke oven closed covers 1 of the coke pushing cars 200 and the coke guide cars 300 corresponding to the two sides of the coke oven 100 and are respectively positioned above an oven door of an operating oven number and above an oven front head and tail coke processing system;
the temperature detection devices 3, 3 ', 6 and 6' are arranged in the front closed area of the coke oven and the oven top;
the coke pusher 200 and the coke guide 300 are designed into a totally-enclosed structure in front of the coke oven 100, namely, the operation area in front of the oven is completely isolated from the coke pusher 200 and the coke guide 300 at two sides and the rear part, and the contact parts of the enclosed area on the coke pusher and the coke oven are soft-sealed gas-filled sealing structures 4 and 4';
the top of the closed area before the coke pusher 200 and the coke guide 300 are arranged with air suction pipes 5 and 5', and the air suction port is arranged with SO2The rotary atomizers 8 and 8 'are arranged above the detection devices 7 and 7';
a flue gas trapping air duct 9 is arranged in the coke oven closed cover 1, and the flue gas trapping air duct 9 is divided into three sub-flue ducts 91, 92 and 93 which respectively correspond to the machine side, the furnace top and the coke side; the three sub-flues are converged at the top and are communicated with the flue gas collecting air duct 10, and a baffle plate and a driving mechanism thereof which can adjust the distribution of air volume among the three sub-flues are arranged in the flue gas collecting air duct 10; the flue gas collecting and collecting air duct 9 is connected to a flue gas collecting fan 11 and a pipeline;
a plurality of Volatile Organic Compounds (VOCs) detection sensors 14 which are respectively arranged on the periphery of the coke oven closed cover 1, a moving coke oven locomotive and a flue gas trapping fan rear pipeline;
a controller (not shown), the furnace front micro-fog dust suppression and cooling device, the temperature detection device and the SO2The detection device, the rotary atomizer, the baffle driving mechanism and the Volatile Organic Compounds (VOCs) detection sensor are respectively connected with the controller.
Preferably, a plurality of micro-fog dust suppression and temperature reduction devices 2 and 2 'are arranged in front of the coke oven machine and the coke side and are respectively positioned at the lower part of the gas collecting pipe, and temperature detection devices 3 and 3' are arranged.
Preferably, the top of the coke oven is provided with a plurality of sets of micro-fog dust suppression and cooling devices, and dust suppression and cooling points are respectively arranged on the ascending pipe platform at the top of the coke oven, the coke side bracket and two sides of the coal tower.
Preferably, porous activated carbon adsorbent columns 51, 51 'are disposed in the gas suction ducts 5, 5'.
Referring to fig. 2, the method for controlling the environment of the closed coke oven of the invention comprises the following steps:
1) partitioned classified micro-fog dust suppression and cooling device
A coke oven sealing cover is arranged above the coke oven; the coke pusher and the coke barrier are respectively provided with a front micro-fog dust suppression and cooling device, and dust suppression and cooling points are respectively positioned above a furnace door of an operation furnace number and above a front head and tail coke treatment system of the furnace; setting temperature detection in a furnace front closed area, regulating and controlling the spraying amount of a spraying point of a micro-fog dust suppression and cooling system according to the temperature change of each area, starting a micro-fog dust suppression and cooling device before a furnace door is opened, and stopping the operation after the furnace door is closed;
2) full-closed furnace front and smoke purification discharge
The coke pusher and the coke guide are arranged in the front of the coke oven in a totally-enclosed structure, so that the front operation area is completely isolated from the two sides and the rear part, and the contact part of the enclosed area on the coke pusher and the coke oven is in a soft-sealing air-filling sealing structure; the top of the closed area in front of the furnace on the vehicle is provided with an air suction pipeline, and an air suction port is provided with an SO2A rotary atomizer is arranged above the detection device, and once SO is generated2The concentration is high, the micro-fog dust suppression and cooling device is shut down, and desulfurizing agents are sprayed in an atomizing mode to desulfurize directly; as shown in figure 2, the door-taking machine moves forward, the door-taking machine moves backward after the furnace door is opened, and SO2Ascending, starting the rotary atomizer and continuing until the door taking machine closes the furnace door;
3) gas monitoring and flue gas trapping fan control in enclosed space
The coke oven closed hood is internally provided with a smoke trapping air channel which is divided into three sub-flues corresponding to the machine side, the oven top and the coke side respectively, the three sub-flues are converged at the top and communicated with a smoke trapping collection air channel, and a baffle capable of adjusting the distribution of air volume among the three sub-flues is arranged in the smoke trapping collection air channel.
The enclosed coke oven body with the cover is a key promotion item for national winning blue sky guard battles, and the overall enclosed coke oven greenhouse tends to be implemented. The invention carries out closed space environment control and intelligent management according to the production characteristics of the coke oven, is simple and easy to implement, has reliable matching technology, is expected to become a key technology of a closed scheme of the coke oven body with a cover, has great economic and social benefits and has very wide popularization and application prospects.
Claims (9)
1. A method for controlling the environment of a closed coke oven is characterized by comprising the following steps:
1) partitioned classified micro-fog dust suppression and cooling device
A coke oven sealing cover is arranged above the coke oven; the coke pusher and the coke barrier are respectively provided with a front micro-fog dust suppression and cooling device, and dust suppression and cooling points are respectively positioned above a furnace door of an operation furnace number and above a front head and tail coke treatment system of the furnace; setting temperature detection in a furnace front closed area, regulating and controlling the spraying amount of a spraying point of a micro-fog dust suppression and cooling system according to the temperature change of each area, starting a micro-fog dust suppression and cooling device before a furnace door is opened, and stopping the operation after the furnace door is closed;
2) full-closed furnace front and smoke purification discharge
The coke pusher and the coke guide are arranged in the front of the coke oven in a totally-enclosed structure, so that the front operation area is completely isolated from the two sides and the rear part, and the contact part of the enclosed area on the coke pusher and the coke oven is in a soft-sealing air-filling sealing structure; the top of the closed area in front of the furnace on the vehicle is provided with an air suction pipeline, and an air suction port is provided with an SO2A rotary atomizer is arranged above the detection device, and once SO is generated2The concentration is high, the micro-fog dust suppression and cooling device is shut down, and desulfurizing agents are sprayed in an atomizing mode to desulfurize directly;
3) gas monitoring and flue gas trapping fan control in enclosed space
The coke oven closed hood is internally provided with a smoke trapping air channel which is divided into three sub-flues corresponding to the machine side, the oven top and the coke side respectively, the three sub-flues are converged at the top and communicated with a smoke trapping collection air channel, and a baffle capable of adjusting the distribution of air volume among the three sub-flues is arranged in the smoke trapping collection air channel.
2. The method for controlling the environment of the closed coke oven as claimed in claim 1, wherein a plurality of micro-fog dust suppression and cooling devices are arranged in front of the coke oven machine and the coke side oven, dust suppression and cooling points are respectively arranged at the lower part of the gas collecting pipe, temperature detection is arranged, and the operation of the micro-fog dust suppression and cooling devices in front of the oven is controlled according to the temperature change.
3. The method for controlling the environment of the closed coke oven according to claim 1, wherein a plurality of sets of micro-mist dust suppression and cooling devices are arranged on the top of the coke oven, dust suppression and cooling points are respectively arranged on the platform of the ascending pipe on the top of the coke oven, the coke side bracket and two sides of the coal tower, and the devices are used for discontinuously spraying, suppressing dust and cooling according to a program, or continuously spraying, suppressing dust and cooling under the condition of ascending pipe in normal production or abnormal fault state according to the operation of a temperature detection device.
4. The method for controlling the environment of the closed coke oven as claimed in claim 1, wherein a porous activated carbon adsorption material column is arranged in the air suction pipeline, and the flue gas in front of the coke oven is directly sucked to a cloth bag dust removal system for dust removal and standard emission after temperature reduction, desulfurization and organic matter adsorption during the coke pushing operation.
5. The closed coke oven environment control method of claim 4, wherein the activated carbon material columns are dual column switchable.
6. An enclosed coke oven environmental control system, comprising:
a coke oven closed cover is arranged above the coke oven, and a front micro-fog dust suppression and cooling device is arranged below the coke oven closed covers of the coke pushing cars and the coke blocking cars corresponding to the two sides of the coke oven and is respectively positioned above the oven door of the operating oven number and above a front head and tail coke processing system of the oven;
the temperature detection devices are arranged in the front closed area and the top of the coke oven;
the coke pusher and the coke guide are designed into a totally-enclosed structure in front of the coke oven, namely, a front operation area is completely isolated from the coke pusher and the coke guide on two sides and the rear part, and the contact part of the enclosed area on the coke pusher and the coke oven is of a soft-sealing air-entrapping structure;
the top of the closed area in front of the coke pusher and the coke guide is provided with an air suction pipeline, and the air suction port is provided with SO2The detection device is provided with a rotary atomizer above the detection device;
a smoke trapping air channel is arranged in the coke oven closed cover and is divided into three sub-flues which respectively correspond to the machine side, the oven top and the coke side; the three sub-flues are converged at the top and are communicated with a flue gas collecting air flue, and a baffle plate and a driving mechanism thereof which can adjust the distribution of air quantity among the three sub-flues are arranged in the flue gas collecting air flue;
the Volatile Organic Compounds (VOCs) detection sensors are respectively arranged on the periphery of the coke oven closed cover, the movable coke oven locomotive and a pipeline behind the smoke trapping fan;
a controller, a furnace front micro-fog dust suppression and cooling device, a temperature detection device and an SO2The detection device, the rotary atomizer, the baffle driving mechanism and the Volatile Organic Compounds (VOCs) detection sensor are respectively connected with the controller.
7. The closed coke oven environment control system of claim 6, wherein the coke oven machine and the coke side are provided with a plurality of micro-mist dust suppression and temperature reduction devices in front of the coke oven machine and the coke side, which are respectively positioned at the lower part of the gas collecting pipe and are provided with temperature detection devices.
8. The closed coke oven environment control system of claim 6, wherein the coke oven roof is provided with a plurality of sets of micro-mist dust suppression and temperature reduction devices, and the dust suppression and temperature reduction points are respectively arranged on the riser platform on the roof, the coke side bracket and two sides of the coal tower.
9. The closed coke oven environmental control system of claim 6, wherein a porous activated carbon-based sorbent column is disposed within the gas-intake duct.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201125227Y (en) * | 2007-08-16 | 2008-10-01 | 鞍山市三态冶化设备材料厂 | Coke oven coal charging and two-in-one earth-based station dust removing system when coke discharging |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201125227Y (en) * | 2007-08-16 | 2008-10-01 | 鞍山市三态冶化设备材料厂 | Coke oven coal charging and two-in-one earth-based station dust removing system when coke discharging |
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