RU2331662C2 - Cokemaking method without recovery of coking chemical products - Google Patents

Abstract

FIELD: petroleum industry.

SUBSTANCE: invention can be used in the chemical-recovery industry. Coal cake of uniform height is formed by stamping tools (6) at the horizontal bed (4) of the stamping chamber (3). Formed coal cake is tilted to the angle corresponding to tilt angle of the coking chamber (1) and then coal cake is loaded by controlled selfflow. Charge coal is coked in the closed coking chamber (1). Carbonised coke is unloaded to the quencher (9) through the doors (8).

EFFECT: high performance of oven and coke quality with simultaneous increase range of applied raw material.

1 dwg

Description

The invention relates to methods for producing coke without trapping chemical products of coking and may find application in the coke industry.

A known method of producing coke, carried out in vertical coke ovens, including the preliminary formation of the same height layer of coal cake outside the coking chamber by ramming the mixture, followed by tipping the coal cake into the coking chamber, coking process, unloading hot coke (see, for example, US Pat. 6332957, IPC: С10В 31/10; С10В 45/02, op. 25.12.2000).

The disadvantages of this method are the inability to achieve high productivity of the process of forming a vertical coal cake, due to the duration of the ramming process due to the limited working area of the ramming and the inability, in this regard, to increase the number of simultaneously operating mechanical ramming devices. In addition, tamping a coal cake for vertical narrow-chamber coke ovens with a height of ~ 5 m and more requires high tampering devices and complicates the tamper technology, especially the lower layers of the coal cake. Also, when tipping a coal cake into a coke oven chamber, it is impossible to maintain its integrity; measures are required against the collapse of the cake.

There is also known a method of producing coke, carried out in furnaces without trapping chemical products of coking, including loading the coal charge into the coking chamber, forming a coal cake of the same height by tamping on a horizontal substrate outside the chamber, which is introduced into the coking chamber on an unconsole conveyor, and after tamping coal cake is removed from the chamber, coking with the formation of volatile chemical products, their burning and utilization of heat, unloading of hot coke (see, for example, US Pat. No. 6059932, IPC: С10В 37/02; СВВ 15/02, application no. 9.05.2000).

The disadvantages of the known solutions are the technical complexity and the relatively long duration of the process, the need to cool the substrate and the coal conveyor fed into the hot chamber, and, moreover, the tamping process is carried out inside the hot chamber, i.e. from the moment the coal charge is introduced into the chamber and before the conveyor is removed from the chamber, gas is degassed and released into the atmosphere, worsening the environmental performance of the process, in addition, mechanical vibration is dangerous for the laying of the chamber.

There is also known a method of producing coke without trapping chemical products of coking, including loading a coal charge into a coking chamber having an inclination at an angle corresponding to the angle of repose of the charge, forming a coal cake of the same height, coking the coal charge with the formation of volatile chemical products, burning and utilizing them , unloading of hot coke (see, for example, application UA 200501301, IPC: С10В 9/00; СВВ 29/00, declared. 02.14.05).

According to the technical nature and the achieved result, the known technical solution is the closest to the claimed one.

In the known technical solution, the formation of a coal cake layer of the same height throughout the entire coking chamber hearth is provided by the inclined position of the coking chamber and depends on the bulk density of the specific coal feed. The disadvantage of this method is the dependence of the productivity of the furnace and the quality of coke on the properties of a particular raw material.

The basis of the invention is the task of creating a method for producing coke without trapping the chemical products of coking, which allows to ensure high productivity of the furnace and the quality of coke by achieving the maximum density of coke cake and expand the range of raw materials used.

The problem is solved in a method for producing coke without capturing chemical coking products, including loading a coal charge into a coking chamber having an inclination at an angle corresponding to the angle of repose of the charge, forming a coal cake of the same height, coking the coal charge with the formation of volatile chemical products, their burning and utilization of heat, unloading of hot coke; wherein the coal cake formed by tamping on a horizontal substrate outside the chamber is tilted at an angle corresponding to the angle of inclination of the coking chamber, and the coal cake is loaded by adjustable self-propelled guns.

A distinctive feature of the proposed method is:

- the coal cake formed by tamping on a horizontal substrate outside the chamber is tilted at an angle corresponding to the angle of inclination of the coking chamber, and the coal cake is loaded by adjustable self-propelled guns.

Based on the described prior art it follows that this difference is new.

Loading a coal cake rammed outside the coking chambers into an inclined coking chamber from an inclined substrate significantly reduces the loading time and simplifies it technologically, which makes it possible to increase the productivity of the furnace. The method allows to achieve the controllability of the technology of coking tamped coal pies according to the main parameters by means of controlled changes in the composition of the coal charge, the density of the coal cake and its height, as well as the coking period, to reduce the time the chamber stays open.

The drawing shows a diagram illustrating the inventive method.

The method of producing coke without trapping the chemical products of coking is carried out in the coking chamber 1, under 2, which is inclined in accordance with the angle of repose of the charge; there is a tamper chamber 3 with a substrate 4, a doorway 5 on the machine side of the coking chamber 1, tamper devices 6, an unloading device 7, doors 8 on the coke side for adjustable self-propelled guns into the extinguishing car 9.

The method is as follows.

Before loading the coal charge into the coking chamber 1 on the substrate 4 of the tamper chamber 3 using tamper devices 6 form the same height coal cake. The substrate 4 is in a horizontal position at the lower edge of the doorway 5 of the chamber 1 from the machine side. In order to load the coal cake into the coking chamber 1, the side of the substrate 4, opposite the doorway 5, is raised so that the angle of inclination of the substrate 4 is equal to the angle of inclination of the coking chamber 1, i.e. under 2 cameras and the substrate form one plane. Next, an adjustable self-propelled coal cake is carried out on under 2 coking chambers 1. At its end, position 4 with tamper chamber 3 is returned to the horizontal position. Camera 1 closes. Carry out the coking process of the coal charge with the formation of volatile chemical products, their combustion and further heat recovery. The finished coke is discharged through the door 8 from the coke side in the extinguishing car 9.

The method is illustrated by the following example.

Example 1. A coal mixture having the composition: G = 63.0; W = 20.0; OS = 5.0; T = 12.0, loaded onto the substrate 4, with an area equal to the area of the coking chamber 75 m ² (width 5.0 m; length 15.0 m) and compacted using tamping devices, forming the same layer of coal cake 1, 0 ± 0.2 m. Tamping time - 1.5-2 minutes. To load coal cake into the coking chamber 1, the side of the substrate 4, opposite the doorway 5, is raised so that the angle of inclination of the substrate 4 is equal to the angle of inclination of the coking chamber 1, they form one plane under the cameras and the substrate. An adjustable self-propelled coal cake is carried into the coking chamber. After this, the coking process is carried out. As a result, the yield of volatiles is: V = 31.8.

Coke quality: M ₂₅ = 89.1; M ₁₀ = 5.5-5.3.

Example 2. For a mixture having a composition: G = 60.0; W = 20.0; OS = 10.0; T = 10.0; V = 29.2-29.0.

Coke quality: M ₂₅ = 88.8; M ₁₀ = 5.9-6.0.

Example 3. For a mixture having a composition: G = 60.0; W = 20.0; OS = 5.0; T = 10.0; SS = 3.0; PA = 2.0; V = 27.1-27.2.

Coke quality: M ₂₅ = 90.0; M ₁₀ = 5.4.

Technical appraisal and economic advantages of the proposed method compared to the prototype method are to ensure high furnace productivity and coke quality, expanding the range of raw materials used.

Claims (1)

A method of producing coke without collecting chemical coking products, including loading a coal charge into a coking chamber having an inclination at an angle corresponding to the angle of repose of the charge, forming a coal cake of the same height, coking the coal charge with the formation of volatile chemical products, burning them and utilizing heat , unloading hot coke, characterized in that the coal cake formed by tamping on a horizontal substrate outside the chamber is tilted at an angle corresponding to the angle on clone of the coking chamber.