RU2320698C1 - Method for dry cooling of coke and apparatus for performing the same - Google Patents

Abstract

FIELD: coke chemical industry.

SUBSTANCE: method involves charging coke into coke-cooler plenum 1 through charging hole 2. During coke cooling process, water boils in water jacket 4 at temperature of 100 C and water steam is delivered due to pressure difference through upper pipe 5 of water jacket 4 into condenser-heater 7 to be condensed. Condenser flows by gravity through pipeline 9 and returns through lower pipe of water jacket 4 into coke-cooler plenum. Heat released from condensed steam heats air running around heat-exchanging surface of condenser-heater 7. Air is delivered by means of fan 11 and is fed to consumer. Cooled coke is discharged through discharging device 3.

EFFECT: increased economy and efficiency of coke cooling process, improved quality of coke, simplified construction and reduced expenses for manufacture of dry coke cooling apparatus.

1 dwg

Description

The invention relates to the field of mineral processing, in particular to the technology of dry quenching of coke, and can be used in the coke industry.

A known method of dry quenching of coke and a device for its implementation (RF patent No. 2034010, IPC 6 C10B 39/02, publ. 04/30/1995). In accordance with this method, the coke in the extinguishing chamber is cooled by gas supplied at different levels by at least two streams, and the gas is removed with its subsequent dust removal and heat recovery.

The reasons that impede the achievement of the following technical result when using the known method are the high energy consumption and burnout of coke.

A known device for dry quenching of coke includes a vertical casing equipped with means for loading and unloading, a circulating gas distributor with several tiers, and a collecting manifold for venting gas.

The reasons that impede the achievement of the following technical result when using the known device is the high installation cost and high operating costs.

Closest to the claimed technical solution is a method of dry quenching of coke and a device for its implementation (RF patent No. 2074222, IPC 6 C10B 39/02, publ. 02.27.1997). In accordance with this method, dry quenching of coke includes a separate supply of refrigerants to the upper and lower parts of the quenching chamber. Moreover, in the upper part of the chamber, coke is cooled by indirect heat exchange with built-in upper cooling surfaces, and cooling in the lower part is carried out by indirect heat exchange with built-in lower cooling surfaces. The deaerated water of the first cooling circuit of the lower heat exchange surfaces is used as a refrigerant, and the steam-water mixture of the second cooling circuit is used to cool the upper heat transfer surfaces.

The reasons that impede the achievement of the technical result indicated below when using the known method is the uneven heat transfer between the coke and the upper and lower heat transfer surfaces, which leads to an increase in quenching time or a decrease in coke productivity.

The known device for dry quenching of coke (RF patent No. 2074222, IPC 6 СВВ 39/02, publ. 02/27/1997) includes a quenching chamber, built-in cooling surfaces for heat exchange located in the upper and lower parts of the chamber, pipelines for supplying and discharging refrigerant in the surface heat transfer, a drum separator, a deaerator, a heat exchanger and two pumps that circulate the refrigerant along the lower and upper circuits.

The reasons that impede the achievement of the result indicated below when using the known device are a large number of devices, two circuits of the refrigerant circulation, as well as the difficulty of the extinguishing chamber in manufacturing and operation.

The objectives of the proposed technical solution are: increasing the cost-effectiveness and efficiency of the coke cooling process, improving the quality of coke, as well as simplifying and cheapening the installation for dry "cooling of coke.

These tasks are achieved by the fact that in the method of dry cooling of coke in a quenching chamber by heat exchange through the wall between the coke mass and the heat carrier, which is used as water, with the formation of at least one coolant circuit, according to the claimed technical solution, the coke is cooled at constant boiling point of water, preferably 100 ° C, in the jacket of the quenching chamber, followed by condensation of the generated steam in a separate condenser-heater with heat removal from it washing the finned tubes of the condenser-air heater, thus to provide coolant circulation circuit organize its pressure drop in the condenser and jacket quenching-chamber air heater to create a gravity flow of condensate into the lower part of the quenching chamber jacket.

These tasks are also achieved by the fact that in the installation for implementing the method of dry cooling of coke, made in the form of a vertical quenching chamber with a coke loading device from above and a discharge device with a shutter from below and including cooling surfaces for heat exchange, pipelines for supplying a heat carrier, in particular water, according to The claimed technical solution as the cooling surfaces of the heat exchange uses the inner wall of the water jacket, which serves as the walls of the chamber and connected by its bottom with a fitting using a pipe and an upper fitting using a steam pipe with a condenser-heater installed above the jacket of the quenching chamber, while the condenser-heater is made in the form of a heat exchanger with external fins and is equipped with an air forced cooling device.

The invention is illustrated in the drawing, which shows the technological scheme of dry cooling of coke.

Installation for dry cooling of coke contains a vertical extinguishing chamber 1 with a loading device 2 and an unloading device 3. The side walls of the extinguishing chamber are made in the form of a water jacket 4 with an upper fitting 5 and a lower fitting 6.

The installation is equipped with a condenser-heater 7 installed above the quenching chamber 1. The upper nozzle 5 of the water jacket 4 is connected by a steam line 8 to the condenser-heater 7, the lower nozzle 6 is connected by a pipe 9 to the lower nozzle 10 of the condenser-heater 7. The latter is equipped with a fan 11.

The inventive method of dry cooling of coke is carried out and the installation operates as follows:

Coke with a temperature of 1000-1050 ° C is loaded into the quenching chamber 1 through the loading hatch 2. In the process of coke cooling, water boils in a water jacket 4 at a temperature of 100 ° C and water vapor under the influence of pressure drop through the upper fitting 5 of a water jacket 4 enters condenser-heater 7, where it condenses, and the condensate flows by gravity through the pipe 9 and through the lower fitting of the water jacket 4 returns to the extinguishing chamber. The heat given off by the condensing steam heats the air, which washes the heat exchange surface of the condenser-heater 7. Air pumps the fan 11 and delivers it to the consumer. The cooled coke is discharged through a discharge device 3.

The inventive combination of technological operations allows for the cooling of coke at a constant boiling point of water. This ensures uniform cooling and, consequently, increases the efficiency of the process and improves the quality of coke.

In addition, the inventive method of dry cooling of coke provides constant condensation of water vapor and the removal of condensation heat by air washing the finned tubes of the condenser-heater, which is sent to the consumer, which improves the efficiency of the process.

Providing gravity flow of condensate to the lower part of the water jacket of the cooling chamber eliminates the use of pumps for circulating the coolant, which reduces the cost and simplifies installation.

Using the proposed method of dry cooling of coke will improve the quality of coke, reduce the cost of installing dry quenching of coke and use heat to heat domestic premises.

Claims (2)

1. The method of dry cooling of coke in a quenching chamber by heat transfer through the wall between the coke mass and the heat carrier, which is used as water, with the formation of at least one coolant circuit, characterized in that the coke is cooled at a constant boiling point of water, preferably 100 ° C, in the jacket of the extinguishing chamber, followed by condensation of the generated steam in a separate condenser-heater with the removal of heat from it washing the finned tubes of the condenser-heater with air, while to provide a coolant circulation circuit organize its pressure drop in the quenching chamber jacket and condenser-air heater to create a gravity flow of condensate into the lower part of the quenching chamber jacket. 2. Installation for dry cooling of coke, made in the form of a vertical quenching chamber with a loading device for coke from above and a discharge device with a shutter from below and including cooling surfaces for heat transfer, pipelines for supplying a heat carrier, in particular water, characterized in that as cooling surfaces are heat exchange the inner wall of the water jacket is used, which serves as the walls of the chamber and is connected by its lower fitting with a pipeline and the upper fitting with a steam pipe with condensation Oromo-heater mounted above relative to the quenching chamber jacket, the capacitor coil is designed as a heat exchanger with external ribbing and provided with a forced air cooling device.