RU2596759C1 - Energy process plant for coke cooling and thermal treatment of coal charge - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to chemical-recovery industry. Energy process plant for coke cooling and thermal treatment of coal charge includes coke cooling chamber and charge heating chamber, separated by a partition and connected by heat exchange elements in form of stacks of heat pipes, located in middle part of coke cooling chamber inclined to horizontal with location of evaporation sections below condensation sections, and steam-water heat exchanger installed in upper part of chamber and connected to a drum-separator. Drum-separator is connected to steam superheater of first stage, pipes of which are combined with pipes of steam-water heat exchanger in stacks, wherein superheater of first stage is connected to steam superheater of second stage, located in combustion chamber, connected by pipeline with baffle of coke furnace battery for supply of coke gas and by pipeline to upper part of coke cooling chamber for supply of hot air, furthermore, superheater of second stage is connected to steam turbine connected to electric generator.

EFFECT: invention increases efficiency of proposed plant.

1 cl, 2 dwg

Description

The invention relates to the field of the coke industry and can be used in other industries for cooling a granular medium.

A known method of heating the coal charge before coking in order to reduce the moisture of the coal charge to the optimum value by drying in special retorts (SU 82154, Class 10a, 21, published 04/30/1950).

The disadvantage of this method is the additional and bulky equipment-retorts, which must be built several for different sizes of the charge.

A known energy-technology installation for cooling coke and thermal preparation of a coal charge, comprising a device for heat exchange of coke with a charge, made in the form of a mine, divided by a longitudinal partition into a coke cooling chamber and a charge heating chamber, interconnected by heat-exchange elements in the form of heat pipe bundles located in staggered in both chambers, and the evaporation sections of the heat pipes are located in the coke cooling chamber. For additional cooling of coke, a flow-through steam-water heat exchanger is used to generate steam, which can be used by heat consumers, including a steam turbine to generate electricity. A steam-water heat exchanger is located along the coke below the stacks of heat pipes (RU 2035489, IPC: С10В 57/10, published on 05/20/1995).

The disadvantage of this energy-technological installation is that the steam-water heat exchanger receives heat from already cooled coke and the low temperature of the steam at the outlet of the steam-water heat exchanger does not allow to obtain a high efficiency of the steam turbine.

The claimed technical solution allows to increase the efficiency of the power plant by increasing the superheat of the steam entering the steam turbine due to the location of the steam-water heat exchanger in the upper, hotter part of the coke cooling chamber in front of the heat pipes, and by providing the power plant with a combustion chamber for afterburning the spent (flue) coke oven gas for the purpose of additional steam overheating.

An energy-technological installation for cooling coke and thermal preparation of a coal charge is proposed, including a coke cooling chamber and a charge heating chamber separated by a partition and connected by heat exchange elements in the form of heat pipe bundles located obliquely to the horizon with the location of the evaporation sections below the condensation sections, and a steam / water heat exchanger installed in the coke cooling chamber and connected to the drum-separator, while the packages of heat pipes are located in the middle part of coke cooling measures, and a steam-water heat exchanger in the upper part of the coke cooling chamber, the drum separator connected to the first stage superheater, the pipes of which are combined with the steam-water heat exchanger tubes in packages, the first stage superheater is connected to the second stage superheater located in the combustion chamber connected a pipeline with a coke battery boron for supplying coke oven gas and a pipe with an upper part of the coke cooling chamber for supplying hot air, in addition, overheating The second stage atelier is connected to a steam turbine connected to an electric generator.

The invention is illustrated in the drawing, which shows:

- in FIG. 1 - general view;

- in FIG. 2 is a section AA in FIG. one.

An energy-technological installation includes a coke cooling chamber 1 and a charge heating chamber 2, separated by a partition 3. A coke cooling chamber 1 and a charge heating chamber 2 are connected by heat exchange elements in the form of packages of heat pipes 4 located obliquely to the horizon, and the evaporation sections of heat pipes 4 in the cooling chamber coke 1 are located lower than the condensation sections in the charge heating chamber 2. Packages of heat pipes 4 are located in the middle of the coke cooling chamber 1. In the upper part of the coke cooling chamber 1 a steam-water heat exchanger 5 is connected, connected at the outlet with a drum-separator 6 and a superheater of the first stage 7. The pipes of the steam-water heat exchanger 5 and the superheater of the first stage 7 are combined into packages and protected by metal sheets to reduce the erosion of the pipes of the steam-water heat exchanger 5 and the superheater of the first stage 7 by pieces of coke (Fig. 2). The superheater of the first stage 7 is connected to the superheater of the second stage 8 located in the combustion chamber 9 of the flue coke oven gas. The combustion chamber 9 is connected by a pipe 10 with a hog 11 of the coke oven battery 12 and a pipe 13 with the upper part of the coke cooling chamber 1 for supplying hot air. The superheater of the second stage 8 is connected by a pipe 14 to the steam turbine 15. An electric generator 16 is located on the shaft of the steam turbine 15.

Installation works as follows. Coke with a temperature of 1000-1050 ° C is periodically loaded from above into the coke cooling chamber 1. At the same time, a moist coal charge with an ambient temperature is continuously loaded into the middle part of the charge heating chamber 2. Hot coke flows around the packages of pipes of the first superheater of the first stage 7, then the packages of pipes of the steam-water heat exchanger 5 and packages of heat pipes 4, while the coke transfers heat to the steam in the superheater of the first stage 7, water in the steam-water heat exchanger 5 and the evaporative sections of the heat pipes 4. As a result of evaporation processes and condensation in the heat pipes 4, coke heat is transferred to the batch particles falling downward in the batch heating chamber 2 and flowing around the heat pipes 4. The steam-water mixture formed in the steam-water heat exchanger 5 enters The drum separator 6, which separates vapor entering further into the first stage reheater and a superheater 7 of the second stage 8, integrated into the combustion chamber 9, the flue gas of the coke. Superheated steam from the superheater of the second stage 8 is sent through a pipe 14 to a steam turbine 15, which drives the electric generator 16. To organize combustion, coke oven gas enters from the boron 11 of the coke-oven battery 12 through the pipe 10 and hot air from the pipe 13 the upper part of the coke cooling chamber 1. Coke and the mixture after lowering are unloaded from chambers 1 and 2 using conventional unloading devices.

Claims (1)

An energy-technological installation for coke cooling and thermal preparation of a coal charge, including a coke cooling chamber and a charge heating chamber, separated by a partition and connected by heat-exchange elements in the form of heat pipe bundles located obliquely to the horizon with evaporative sections below the condensation sections, and a steam-water heat exchanger installed in coke cooling chamber and connected to a drum-separator, characterized in that the heat pipe bundles are located in the middle part to coke cooling amers, and a steam-water heat exchanger in the upper part of the coke cooling chamber, while the drum-separator is connected to the first stage superheater, the pipes of which are combined with the steam-water heat exchanger tubes in packages, and the first stage superheater is connected to the second stage superheater located in the combustion chamber connected by a pipeline with a boron of a coke oven battery for supplying coke oven gas and a pipe with an upper part of a coke cooling chamber for supplying hot air, in addition, operegrevatel second stage is connected to a steam turbine connected to an electrical generator.

Images