Classifications

• • 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
  • C10B39/00—Cooling or quenching coke
  • C10B39/02—Dry cooling outside the oven

Definitions

• the present group of inventions relates to the coke industry and can be used in dry quenching systems of coke (hereinafter CCTC).
• Dry coke quenching methods and devices implementing them are based on cooling coke in a coke quenching chamber with a cooling agent that circulates in the cooling agent circulation system (see M. Teplitsky et al. Dry coke quenching, M., “Metallurgy”, 1971, US patent NQ 3895448, publ. 07/22/1975; US patent NQ 4141795, publ. 02/27/1979).
• the coke quenching chamber is a vertically located shaft lined with refractory masonry, into which coke is supplied by means of metered loading.
• Coke quenching in the coke quenching chamber is carried out by passing a cooling agent through the coke layer, which is inert with respect to coke.
• the cooling agent circulation system usually contains a coarse filter, usually made in the form of a dust collecting bin, a recovery boiler, which is a relatively tight chamber in which heat-exchanging surfaces are placed, to which the cooling agent gives off heat, and means for removing the excess volume of the cooling agent from the circulation system of the cooling agent.
• a fine filter of the cooling agent made in the form of a cyclone, is installed, followed by a blower device, for example, a smoke exhauster.
• a candle enters the circulation system of the cooling agent as a means for removing the excess volume of the cooling agent that is formed in the circulation system of the cooling agent as a result of air suction.
• the CCPF operates in a specific aerodynamic mode, namely, in the upper part of the coke quenching chamber, a pressure close to atmospheric pressure (the so-called aerodynamic zero) is maintained, which prevents the release of a cooling agent during coke loading into the coke quenching chamber, and also prevents into the cooling agent of air, the presence of which in the cooling agent leads to the burning of coke.
• the aerodynamic zero in the upper part of the coke quenching chamber is maintained by draining the excess volume of the cooling agent into the atmosphere through the candle of the cooling agent circulation system.
• the candle of the cooling agent circulation system is installed after the draft device.
• the pressure value exceeds atmospheric by 200-300 kgf / m 2 , due to the high resistance of coke during the passage of the cooling agent through the coke, which leads to emissions of the cooling agent from the coke quenching chamber at the time of coke unloading a vehicle, such as a conveyor.
• a means for continuous coke unloading is installed in which a pressure equal to atmospheric pressure is created, the so-called “air shutter”.
• the pressure value in the means for continuous unloading of coke, which is equal to atmospheric is created using the recirculation circuit of the cooling agent and the circuit of the gas mixture.
• the coolant recirculation loop is associated with a means for continuously discharging coke and a circulation system for the cooling agent, which reduces the vacuum in the means for continuously discharging coke and ensures safe unloading of coke to the vehicle, and also prevents emissions into coolant atmosphere.
• the circulation circuit of the gas mixture is a circuit that is adjacent to the means for the continuous discharge of coke.
• a gas mixture circulates along the circuit, which was formed during the mixing of the cooling agent with air, which enters the circuit of the gas mixture as a result of suction through a means for the continuous discharge of coke.
• the circulation of the gas mixture is carried out through the use of a smoke exhauster installed in the circulation circuit of the gas mixture.
• a dust-collecting cyclone is installed in the circulation circuit of the gas mixture, designed to reduce the wear of the smoke exhaust, as well as increase the efficiency of dust removal of coke.
• the circulation circuit of the gas mixture reduces the likelihood of the release of the cooling agent during the operation of the CCPD, and also allows to achieve effective dedusting of coke and allows for the effective degassing of coke, namely, to remove the cooling agent from the pores of the coke and the inter-bite space.
• the determination of the amount of air suction in the circulation system of the cooling agent is carried out in the process of operation of the CCP. So, during the operation of the CCP, the pressure sensor, which is located in the upper part of the CCP, constantly monitors the pressure value in the upper part of the coke quenching chamber. With increasing pressure in the upper part of the coke quenching chamber, excess coolant is discharged from the cooling agent circulation system through a candle into the atmosphere. During the discharge of the excess volume of the cooling agent through a candle into the atmosphere, measurements of the amount of cooling agent are carried out using known means, for example, flowmeters. Then determine what excess volume of the cooling agent was discharged into the atmosphere per unit time (h).
• the obtained value is divided by the value of the amount of cooling agent that was extinguished by coke quenching in the coke quenching chamber for the same period of time (h), after which the air suction coefficient is obtained.
• the effectiveness of the USTK is judged.
• the coefficient of air suction in the CCP can be up to 15%. With the coefficient suction of air equal to 15% or more USTK stop for major repairs.
• a dry coke extinguishing installation includes: a) a coke extinguishing chamber, b) a cooling agent circulation system including a recovery boiler and means for removing an excess volume of a cooling agent from a cooling agent circulation system, c) means for continuously discharging coke from a coke extinguishing chamber, d ) a coolant recirculation loop connecting a means for continuously discharging coke with a cooling agent circulation system.
• the dry coke quenching method includes: a) metered loading of coke into the coke quenching chamber, b) cooling of coke in the coke quenching chamber by a cooling agent that circulates along the cooling agent circulation circuit, c) supply of coke from the quenching quenching chamber to the means for continuous coke unloading with simultaneously withdrawing the cooling agent from said cooling agent circulation system to a means for continuously discharging coke, d) removing the cooling agent from the means for continuously discharging coke to a cooling circulation system cooling agent through a recirculation loop, e) withdrawing an excess volume of cooling agent from the cooling agent circulation system, f) the unloading of coke from the means for the continuous unloading of coke on the vehicle.
• a design feature of the known CCCT and the method embodied therein is that the CCCT is equipped with an additional cooling agent recirculation circuit, which is connected to a means for continuously discharging coke and a cooling agent circulation system.
• the cooling agent circulation system is provided with means for removing an excess volume of the cooling agent in the form of a candle.
• the aerodynamic zero is maintained in the upper part of the coke quenching chamber by dumping into the atmosphere an excess volume of the cooling agent through the aforementioned candle.
• the disadvantage of the STCC and the method implemented therein is that the aerodynamic zero is maintained in the upper part of the coke quenching chamber by dumping an excess volume of the cooling agent into the atmosphere through a candle, which leads to environmental pollution.
• the cooling agent contains about 6% carbon monoxide, whose calorific value is 3270 kcal / m 3 .
• the chemical heat that is contained in the cooling agent is not used.
• the discharge of the cooling agent into the atmosphere leads to inefficient utilization of the heat contained in the cooling agent and environmental pollution.
• PROTOTYPE A known installation and method for dry quenching of coke (a.s. SU 1600329,
• the dry coke extinguishing installation comprises: a) a coke quenching chamber, b) a cooling agent circulation system including a recovery boiler and means for removing an excess volume of the cooling agent from the cooling agent circulation system, c) means for continuously discharging coke from the coke quenching chamber, d) a coolant recirculation circuit connecting a means for continuously discharging coke with a cooling agent circulation system, e) a gas mixture circulation circuit adjacent to the means for discharging coke.
• the cooling agent circulation system comprises, as a means for draining an excess volume of the cooling agent from said circulation system, a candle for draining the cooling agent.
• the gas mixture circuit contains a spark plug to discharge the gas mixture.
• the dry coke quenching method includes: a) metered loading of coke into the coke quenching chamber, b) cooling of coke in the coke quenching chamber by a cooling agent that circulates in the cooling agent circulation system, c) supply of coke from the quenching quenching chamber to the means for continuous coke unloading with by simultaneously withdrawing the cooling agent from said cooling agent circulation system to a means for continuously discharging coke; d) removing the cooling agent from the means for continuously discharging coke into a cooling system its agent through a coolant recirculation loop, e) withdrawing an excess volume of the cooling agent from the cooling agent circulation system,
• a feature of the well-known CCP and the method embodied in it is that the aerodynamic zero is maintained in the upper part of the coke quenching chamber by draining the excess volume of the cooling agent from the cooling agent circulation system and dumping it into the atmosphere through the candle of the cooling agent circulation system.
• Another feature of the well-known USTK is the discharge into the atmosphere of the gas mixture through the spark plug circuit of the gas mixture.
• Another feature of USTK is that the discharge from the circuit of the gas mixture into the atmosphere is equal to the amount of suction of the cooling agent and air.
• the disadvantage of the CCP and the method implemented therein is that when the excess volume of the cooling agent is removed from the cooling agent circulation system through a candle, the known CCP does not use the chemical heat contained in the cooling agent. The removal of the excess volume of the cooling agent into the atmosphere leads to inefficient utilization of the chemical heat contained in the cooling agent, as well as to environmental pollution.
• the main objective of this group of inventions is to improve the dry quenching of coke and the dry quenching of coke, which allows to increase the efficiency of utilization of heat contained in the coke.
• Another objective of this group of inventions is to develop a dry coke quenching apparatus and a dry coke quenching method that can reduce environmental pollution by carbon monoxide.
• the task of the group of inventions is achieved through the use of chemical heat contained in the cooling agent and / or gas mixture, which is removed from the means for the continuous discharge of coke and / or from the circulation system of the cooling agent to an additional recovery boiler, in which the cooling agent and / or the gas mixture is subjected to heat treatment followed by heat recovery exhaust gases, which were formed as a result of heat treatment of the specified cooling agent and / or gas mixture, in an additional recovery boiler.
• the task of the group of inventions is achieved by improving the aerodynamic regime in a dry coke quenching installation, which allows to increase the organized air suction into a means for continuous coke unloading and additionally utilize the physical heat of coke.
• a dry quenching coke extinguishing installation comprising: a) a coke quenching chamber, b) a cooling agent circulation system including a recovery boiler and means for removing an excess volume of the cooling agent from the cooling agent circulation system, c) means for continuous discharge of coke from the coke quenching chamber, d) a coolant recirculation loop connecting means for continuous discharge of coke with a coolant circulation system, e) a gas mixture circulation loop, ykayuschy a means for continuously discharging the coke according to the claimed invention, f) installing the dry quenching of coke comprises at least one additional waste-heat boiler, which is connected to the circulation circuit of the gas mixture and / or with a cooling agent circulation system.
• an additional recovery boiler ensures an increase in the efficiency of utilization of the heat contained in the coke due to the use of chemical heat contained in the cooling agent and / or a gas mixture that is subjected to heat treatment in an additional recovery boiler.
• the additional recovery boiler includes a heat exchanger and a reactor containing at least one burner device, and is also equipped with a smoke exhauster.
• the reactor of the additional recovery boiler is connected to the cooling agent circulation system, and the burner device of the additional recovery boiler is connected to the means for continuous unloading of coke.
• the task is achieved by the fact that in the known method, comprising: a) dosed coke loading into the coke quenching chamber, b) coke cooling in the coke quenching chamber with a cooling agent that circulates in the cooling agent circulation system, c) supply coke from the coke quenching chamber into a means for continuously discharging coke with simultaneous removal of a cooling agent from said cooling agent circulation system into means for continuously discharging coke, d) a cooling discharge agent from the means for continuously discharging coke into the cooling agent circulation system by means of the cooling agent recirculation circuit, e) removing an excess volume of the cooling agent from the cooling agent circulation system, f) circulating the gas mixture in the means for continuously discharging coke by means of the coke recycling system through the gas mixture recirculation circuit coke in the specified means, g) unloading coke from the means for the continuous unloading of coke on the vehicle, according to the claimed invention, h) the excess
• the heat treatment of the cooling agent and / or the gas mixture, followed by the utilization of the heat of the exhaust gases, increases the utilization of the heat contained in the coke by utilizing the chemical heat contained in the cooling agent and / or the gas mixture.
• the cooling agent and / or the gas mixture are enriched with fuel and / or air before being fed to an additional recovery boiler.
• the enrichment of the cooling agent and / or the gas mixture with fuel and / or air before being fed to the additional recovery boiler provides an effective disinfection of the cooling agent and / or the gas mixture containing carbon monoxide.
• heat treatment of the cooling agent and / or gas mixture in an additional recovery boiler is carried out at a temperature of 700-1100 0 C.
• Thermal treatment of the cooling agent and / or gas mixture at a temperature of 700-1100 0 C provides the efficient utilization of chemical heat contained in the cooling agent and / or gas mixture, and also leads to a decrease in carbon monoxide (CO) in the exhaust gases.
• CO carbon monoxide
• the cooling agent and / or the gas mixture are dedusted before being fed to an additional recovery boiler. This allows you to catch coke dust, the combustion of which requires a temperature above 2000 0 C, and to increase the reliability of the additional recovery boiler.
• FIG. 1 is a preferred layout of a dry coke quenching unit
• FIG. 2 is a particular example of a dry quenching quenching unit.
• FIG. 1 A preferred embodiment of a dry coke quenching apparatus is shown in FIG. 1, in accordance with which the installation contains: a) a coke extinguishing chamber 1, b) a cooling agent circulation system 2 connecting a coke extinguishing chamber 1 with a recovery boiler 3, c) means for continuously discharging coke 4 from a coke extinguishing chamber 1, d ) a coolant recirculation circuit 5 connecting the coke 4 continuous discharge means to the cooling agent circulation system 2, e) a gas mixture circulation circuit 6 adjacent to the coke 4 continuous discharge means.
• the dry coke quenching unit also contains an additional recovery boiler 7, which is connected to the circulation circuit 6 of the gas mixture and / or to the circulation system 2 of the cooling agent.
• An additional recovery boiler 7 is equipped with a smoke exhaust 8i.
• the additional recovery boiler 7 includes a heat exchanger 9 and a reactor 10 containing a burner 11.
• the additional recovery boiler 7 is connected to the cooling agent circulation system 2 via a pipe 12 1 (which is a means for draining the excess volume of the cooling agent from the cooling circulation system 2
• the regulator 14i is mounted on the 12t pipeline.
• the burner 1 1 of the additional waste heat boiler 7 is connected to the gas mixture circulation circuit 6 by the 12g pipeline, on which regulator 14 2 gas mixture supply from the circuit circulation 6 of the gas mixture into the burner 11 of the additional waste heat boiler 7.
• the circulation circuit 6 of the gas mixture is equipped with a smoke exhauster 8 g, a dust cleaner 13 and a regulator 14 3 for supplying the gas mixture to the means for continuous unloading of coke 4.
• the cooling agent circulation system 2 contains a smoke exhauster 8 3 , and the recirculation circuit 5 is equipped with a regulator 14 4 for regulating the supply of the cooling agent from the means for continuously discharging coke 4 into the cooling agent circulation system 2.
• a pressure sensor is installed in the upper part of the coke quenching chamber 1
• the additional recovery boiler 7 is equipped with a gas duct 17 installed after the exhaust fan 8i to remove exhaust gases from the additional recovery boiler 7.
• Hot coke using loaders (not shown in the figures) is loaded into the coke quenching chamber 1.
• dry quenching of coke is performed by passing a cooling agent through the coke layer.
• the cooling agent is circulated in the coke quenching chamber 1 by means of the cooling agent circulation system 2, which is equipped with a waste heat boiler 3 and a smoke exhauster 8h.
• Coke, due to the action of gravity, from the quenching chamber of coke 1 enters the means for continuous unloading of coke 4.
• a cooling agent enters the means for continuous unloading of coke 4 from the circulation system 2 of the cooling agent.
• the cooling agent is withdrawn to the cooling agent circulation system 2 through the recirculation circuit 5 of the cooling agent. Also produce the removal of excess the volume of the cooling agent from the means for the continuous discharge of coke 4 into the circuit 6 of the gas mixture. In addition, the excess volume of the cooling agent from the circulation system 2 of the cooling agent flows through the regulator 14i and the pipe 12i into the reactor 10 of the additional recovery boiler 7.
• an excess volume of the cooling agent is mixed with air, which enters the circulation circuit 6 of the gas mixture through means for continuously discharging coke 4, due to the suction of air from the atmosphere.
• the mixture of excess cooling agent and air in the circuit 6 of the gas mixture leads to the formation of a gas mixture, which is discharged from said circuit 6 through a pipe 12 2 to the burner device 11 of the additional recovery boiler 7.
• the amount of the gas mixture in the circuit 6 of the gas mixture is regulated using the regulator 143 and the smoke exhauster 8g, taking into account the pressure in the upper part of the fire extinguishing chamber 1, registered by the pressure sensor 15.
• the gas mixture circulation circuit 6 the gas mixture is dedusted by means of a dust collector 13.
• the volume of the gas mixture supply from the gas mixture circulation circuit 6 to the burner device 11 of the additional recovery boiler 7 is controlled by the regulator 14 g.
• the excess volume of the cooling agent and / or gas mixture is heat treated at a temperature of 700-1100 0 C, resulting in the formation of exhaust gases that give off heat to the heat exchanger 9, after which the exhaust gases are removed from the additional recovery boiler 7 with the help of a smoke exhaust fan 8i into the atmosphere through a gas duct - 17.
• FIG. 2 shows a particular example of the installation of a dry coke quenching installation, according to which the burner 11 of the additional waste heat boiler 7 is connected to the circulation circuit 6 of the gas mixture by means of a pipe 12 2 , and the reactor 10 of an additional recovery boiler 7 is connected by a pipe 12 3 to a regulator 14 2 .
• the removal of the excess volume of the cooling agent is carried out through the means for the continuous unloading of coke 4 into the additional recovery boiler 7, and the discharge regulation is carried out by the regulator 14 3 .
• the volume of the gas mixture having a temperature of 200 0 C and circulating in the circuit 6 of the gas mixture in the steady state was 15,000 m 3 / h, f) 4000 m 3 / h of excess coolant volume with a temperature of 170 0 C was removed from the circulation system 2 cooling agent through line 12i to the reactor 10 of the additional recovery boiler 7, in which the cooling agent was thermally treated at a temperature of 1000 0 C.
• the gas mixture was also discharged in a volume of 1800 m 3 / h from the circulation loop 6 through the pipe 12 2 to the burner 11 of the additional recovery boiler 7.
• the gas mixture was subjected to heat treatment at a temperature of 1000 0 C followed by heat recovery of exhaust gases using a heat exchanger 9 of an additional waste heat boiler 7, g) as a result of heat treatment of the gas mixture in an additional heat recovery boiler 7, CO afterburning occurred (chemical heat was released), which allowed increasing ichit efficiency of heat recovery, contained in the coke, h) during the discharge of the gas mixture from the circulation circuit 6 gas mixture in the burner device 11
• the additional HRSG 7 performed administering fuel, such as coke oven gas, a gas mixture, in order to maintain a stable temperature in the reactor 10 of the additional waste heat boiler 7, i) then the gases leaving the additional heat recovery boiler 7 were vented to the atmosphere using the exhaust fan 8i through the gas duct 17, j) the coke was unloaded from the means for the continuous unloading of coke 4 to the
• Table 1 presents data on the claimed method of dry quenching of coke, which is implemented in accordance with the above example.
• productivity was 52 t / h coke.
• the pressure value in the coke quenching chamber 1 was controlled using a pressure sensor 15 located in the upper part of the coke quenching chamber 1.
• the coefficient of air suction into the cooling agent circulation system 2 was 6.08%.
• the following was carried out: a) metered loading of coke into the quenching chamber of coke 1 as coke ovens were unloaded (not shown in the drawings), in which coke was obtained by coking, b) cooling of coke in the quenching quenching chamber 1 by a cooling agent, for which 74000 m 3 / h of cooling agent was supplied through a cooling system 2 of the cooling agent into the coke quenching chamber 1, c) as coke arrived at a temperature of 250 ° C from the coke quenching chamber 1 into the means for continuous unloading of coke 4, 15,500 m 3 was removed h a cooling agent with a temperature of 170 ° C from the circulation circuit 2 of the cooling agent to a means for continuously discharging coke 4; produced air suction in the amount of 1300 m 3 / h, d) the cooling agent received in the means for the continuous unloading of coke 4 with a temperature of 170 0 C in
• the cooling agent was removed in a volume of 11000 m 3 / h from the means for the continuous discharge of coke 4 along the recirculation loop 5 into the circulation system 2 of the cooling agent. Also, an excess volume of the cooling agent with a temperature of 220 ° C was removed in a volume of 4,500 m 3 / h from the means for continuously discharging coke 4 into the gas mixture circulation circuit 6.
• the volume of the gas mixture having a temperature of 200 0 C and circulating in the circuit 6 of the gas mixture in the steady state was 15,000 m 3 / h; air was sucked in the amount of 1300 m 3 / h; f) the gas mixture was discharged in a volume of 5800 m 3 / h from the gas mixture circulation circuit 6 to the reactor 10 and burner device 11, while 800 m 3 / h were sent via line 12 2 to the burner 11 of the additional recovery boiler 7, and 5000 .. m 3 / h was sent via a pipe 12 3 to the reactor 10 of the additional recovery boiler 7.
• the volume of the gas mixture into the reactor 10 and the burner 11 were regulated using the regulator 14 2 , f) in the additional waste heat boiler 7, gas the mixture was subjected to heat treatment at a temperature of 1000 ° C followed by heat recovery of the exhaust gases using the heat exchanger 9 of the additional waste heat boiler 7, g) as a result of heat treatment of the gas mixture in the additional heat recovery boiler 7, CO was burned (chemical heat was released), which allowed increase the efficiency of heat recovery contained in coke, h) during the removal of the gas mixture from the means for the continuous unloading of coke 4 into the burner device 11 of the additional recovery boiler 7,
• Table 2 presents data on the claimed method of dry quenching of coke, which is implemented in accordance with the above example 2.
• the use of the claimed group of inventions increases the efficiency of the CCCT due to the use of chemical heat that is released during the afterburning of carbon monoxide (CO) contained in the cooling agent and / or gas mixture, which provides an increase in the efficiency of utilization of heat contained in the coke, and reduces environmental pollution.
• CO carbon monoxide
• the technical result of the claimed group of inventions is to increase the efficiency of utilization of heat contained in the coke, and reduce environmental pollution by carbon monoxide (CO).

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• Oil, Petroleum & Natural Gas (AREA)
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• 2007
  • 2007-12-07 UA UAA200713706A patent/UA83982C2/uk unknown
• 2008
  • 2008-07-09 RU RU2008128020/15A patent/RU2377273C1/ru not_active IP Right Cessation
  • 2008-10-29 WO PCT/UA2008/000063 patent/WO2009072996A1/ru active Application Filing

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