SU1550188A1 - Power and process plant with thermal-contact coal coking - Google Patents

Abstract

The invention allows to increase the efficiency and maneuverability of the installation. Coal is heated in an aerofantage dryer 5 with hot gases from coke heater 1 and fed through heat exchanger-adsorber 15 to process reactor 2, where it is subjected to coking when heated with coke coming from coke heater 1. From reactor 2, semi-coke is sent back to coke heater 1, where part it is burned and part is sent to coke cooler 7. Exhaust gases are fed to the electrostatic precipitator 10 for cleaning. Steam-gas products from reactor 2 through heat exchanger-adsorber 15 are sent to workshop 20, where pyrolysis gas and pulverized semi-coke are separated from them, which are burned in a coke heater. The working fluid of the steam power circuit is evaporated from the surface 29 located in the zone of the boiling bed of the coke heater 1, and the steam is triggered in the steam turbine 30 to generate electricity. 1 il.

Description

31550188

The invention relates to a power system and can be used in power plants with energy technology installations.

The purpose of the invention is to increase the efficiency and maneuverability of the installation.

The drawing shows the scheme of the proposed installation.

The installation contains a coke heater 1 with a zone of the fluidized bed (not shown in the drawing) and the process reactor 2, reported by the coke pipe 3 and the pipe 4 with semi-15 coke, an aerofountain dryer 5 connected to the coke heater by pipe 6, coke cooler 7 connected to coke heater by pipeline 8 and having 20 20 9 fine-grained semi-coke pipe, electrb filter 10 with pipe 11 of pulverized semi-coke and pipe 12 of exhaust gases connected by pipelines 13 and 14 to the aerofountain 25 dryer 5 and cool 7 w coke, respectively, the heat exchanger - air-fountain to the drier 5 adsorber 15, connected conduit 16 and conduits 17 and 18 - to the process,

reactor 2. The installation also contains a system 20 for cleaning, condensation and trapping the gas-vapor mixture with pipelines connected by pipe 19 to heat exchanger-adsorber 15

The coals are fed through pipeline 6 and coke heater 1. Dry coal is supplied through pipeline 1 6 to heat exchanger-adsorber 15, where it is displaced with steam-gas products of thermal decomposition of coal coming from pipeline 17. In a heat exchanger - adsorber 1 5 particles of coal adsorb the heavy fraction of the resin, which increases the yield of its light fractions. At the same time, the physical heat of the gaseous products is utilized in it when the coal is heated. In reactor 2, coal entering through conduit 18 is mixed with hot coke, sent there from coke heater 1 through conduit 3. At the same time, the coal is heated to a predetermined reaction temperature and is subjected to thermal decomposition with the formation of vapor-gas products and semi-coke. Semi-coke through line 4 is returned to coking unit 1, where it is heated by partial combustion in a fluidized bed, organized by the air flow supplied through pipeline 28. Pyrolysis gas and semi-coke can also be burned in the coke heater coming through pipelines 21 and 22. Excessive half of coke from the coke heater removes

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21, 22, 23, 24, 25 and 26 of the gas hydrolyzed through conduit 8 to cooler 7 for pulverized semi-coke, pyrogenic water, gas gasoline, light tar and heavy tar, respectively. The aerial fountain dryer 5 is equipped with a pipeline of 27 coal, and the coke heater 1 is equipped with a pipeline of air 28. Pipe 21 gas hydrolysis and pipe 22 pulverized char are connected to the coke heater 1. In addition, the installation is equipped with a steam power circuit with a heating surface 29 located in the zone of the boiling bed of the coke heater 1, the steam turbine 30, the condenser 31, the pump 32 and the steam extraction pipeline 33 from the turbine 30 connected to the reactor 2 and the system 20.

The installation works as follows.

The pre-crushed coal is led through conduit 27 to an aerial fountain dryer 5, where it is heated and dried by hot gas 50

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coke. Fine-grained semi-coke is removed from cooler 3 of coke by pipe 9 and is a commercial product of the installation. The vapor-gas products obtained in the reactor 2 are determined from the entrained dust in the built-in cyclones and through the heat exchanger-adsorber 15 are supplied via pipeline 19 to the system 20 for cleaning, condensing and trapping the vapor-gas products. the latter releases from the vapor-gas products pyrolysis gas and pulverized coal char supplied through pipelines 21 and 22 to the coking coke 1 for combustion, as well as gas gasoline, light and heavy tar, which are directed through consumers' pipelines 266. Pyrogenic water is removed through the pipeline 23. The hot gases flowing from the coke heater and coke cooler flow through pipelines 13 and 14 to the electric filter 10, where they are removed from the coke heater 1 by means of pipeline 6. Dry coal is fed through pipelines The gullet 1 6 is transferred to the heat exchanger-adsorber 15, where it is displaced with the vapor-gas thermal decomposition products coming from the process reactor 2 through line 17. In the heat exchanger-adsorber 1 5 the coal particles adsorb a heavy fraction of the resin, which increases the yield of its light fractions. At the same time, the physical heat of the gaseous products is utilized in it when the coal is heated. In reactor 2, coal entering through conduit 18 is mixed with hot coke sent there from coke heater 1 via conduit 3. At the same time, coal is heated to a predetermined reaction temperature and is subjected to thermal decomposition with the formation of vapor-gas products and semi-coke. Semi-coke through line 4 is returned to coke heater 1, where it is heated by partial combustion in a fluidized bed, organized by the air flow supplied through line 28. Pyrolysis gas and pulverized semi-coke can be burned into the coke heater through pipelines 21 and 22. The excess of coke from the coke heater is discharged through pipeline 8 to the cooler 7

from pipeline 8 to cooler 7

coke. From coke cooler 3, fine-grained semi-coke, a commercial product of the plant, is removed through conduit 9. The vapor-gas products obtained in the reactor 2 are determined from the entrained dust in the built-in cyclones and through the heat exchanger-adsorber 15 are fed via pipeline 19 to the system 20 for cleaning, condensing and trapping the vapor-gas products. In the latter, pyrolysis gas and pulverized semi-coke is supplied from the vapor-gas products, supplied through pipelines 21 and 22 to the coke-heater 1 for combustion, as well as gas gasoline, light and heavy tar, which are channeled through pipelines 24-26 by consumers. Pyrogenic water is removed through conduit 23. The hot gases from the coke heater and coke cooler leave through the conduits 13 and 14 to the electrostatic precipitator 10, where they are removed.

left-wing semi-coke. From the electrostatic precipitator 1 0, gases and semi-coke are removed through pipelines 12 and 11 o

The working fluid of the steam power circuit evaporates and overheats in the heating surface 29 due to the heat of coke and the heat of combustion of the pyrolysis gas and pulverized semi-coke fed to the coke heater 1. The steam is supplied to the turbine 30, where as it expands, electric power is generated. The exhaust steam is condensed in the condenser 31, and the condensate enters through the pump 32 into the heating surface 29. To ensure a quality process, part of the steam from the turbine is supplied via pipeline 33 to reactor 2 and system 20. In the case of an increase in the electrical power of the installation, increase the flow rate hot steam into the turbine head 30. For this, the supply to the coke heater 1 of hydrolysis gas, pulverized coal char and air blowing is increased. The regulation of the hydrolysis temperature and other process parameters in the reactor 2 is carried out by varying the degree of circulation of the coolant between the reactor 2 and the heater 1.

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The proposed plant (compared to the known ones) increases the efficiency and maneuverability by combining the coke heater and heating surfaces of the steam power circuit in one unit, burning pyrolytic gas and pulverized coal char in the coke heater.

Claims (1)

Invention Formula An energy technological installation with thermal contact coking of coal, containing, reported by the KSx and semi-coke pipelines, a coke heater with a fluidized bed zone and a process reactor connected to the cleaning, condensation and capture system of steam and gas products with pyrolysis and coke gas pipelines, and redo-gas and redo-coke, as well as in the case of steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, and in the case of steam, coke, steam, steam, coke, and in the case of steam, coke, steam, coke, and steam, coke, in the form of steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, steam, coke, steam, body, steam, steam, coke, steam, body, steam, steam, coke, and redo-coke, and in case of steam, coke, and steam, coke; and a heating surface, which is characterized by the fact that, in order to increase efficiency and maneuverability, the heating surface of the steam power circuit is placed and in the zone of the fluidized bed of the coke heater, with the pyrolysis gas and pulverized semi-coke pipelines connected to the latter.