KR-20260065110-A - DEVICE FOR PURIFICATION OF COKE OVEN GAS

KR20260065110AKR 20260065110 AKR20260065110 AKR 20260065110AKR-20260065110-A

Abstract

The present invention relates to a coke oven gas purification device for removing hydrogen sulfide and ammonia contained in coke oven gas together. The coke oven gas purification device comprises: an absorption tower that discharges an absorption liquid containing hydrogen sulfide and ammonia in the coke oven gas to the bottom; a regeneration tower connected to the absorption tower and separating hydrogen sulfide and ammonia contained in the absorption liquid discharged from the absorption tower into a gaseous phase; a de-sulfurizing water supply unit that supplies de-sulfurizing water discharged from the bottom of the regeneration tower; a caustic soda supply unit that stores and supplies caustic soda; a mixing strainer that connects the de-sulfurizing water supply unit and the caustic soda supply unit to each other, receives de-sulfurizing water and caustic soda from the de-sulfurizing water supply unit and the caustic soda supply unit respectively, and mixes them together; and a booster pump that supplies the mixture mixed in the mixing strainer to the absorption tower at a constant flow rate.

Inventors

조성광
최판철
강광원

Assignees

(주)포스코퓨처엠

Dates

Publication Date: 20260508
Application Date: 20241031

Claims (7)

An absorption tower that discharges the absorption liquid, in which hydrogen sulfide and ammonia in the coke oven gas have been absorbed, downwards; A regeneration tower connected to the absorption tower and separating hydrogen sulfide and ammonia contained in the absorption liquid discharged from the absorption tower into a gaseous state; A de-glazing water supply unit that supplies de-glazing water discharged from the lower part of the above-mentioned regeneration tower; A caustic soda supply unit that stores and supplies caustic soda; A mixing strainer that connects the desulfurization water supply unit and the caustic soda supply unit to each other, receives desulfurization water and caustic soda from the desulfurization water supply unit and the caustic soda supply unit, respectively, and mixes them together; and A booster pump that supplies the mixture mixed in the above mixing strainer to the above absorption tower at a constant flow rate; A coke oven gas purification device including
In paragraph 1, The above-mentioned de-anes supply unit is, A de-anodized water supply pipe for supplying the de-anodized water discharged from the lower part of the regeneration tower to the mixing strainer; and A de-eye water pump connected to the above de-eye water supply pipe and pressurizing the de-eye water to a constant pressure; A coke oven gas purification device including
In paragraph 1, The above caustic soda supply unit is, Caustic soda storage tank for storing caustic soda; A caustic soda pump that pressurizes the caustic soda discharged from the above caustic soda storage tank to a constant pressure; and A caustic soda supply pipe that supplies pressurized caustic soda from the above caustic soda pump to the above mixing strainer; A coke oven gas purification device including
In paragraph 1, The above-mentioned mixed strainer is A first inlet provided on one side of the upper portion, into which de-eye water flows; A second inlet provided on the upper side, into which caustic soda flows; A main body in which de-anthated water introduced from the first inlet and caustic soda introduced from the second inlet are mixed with each other; and A discharge port provided at the lower part of the main body and for discharging a mixture mixed inside the main body: A coke oven gas purification device including
In paragraph 1, A coke oven gas purification apparatus in which the equivalent ratio of caustic soda to the above desulfurization water is 1:0.8-1.2.
In paragraph 1, A coke oven gas purification device characterized by a discharge head of 20m or more from the booster pump.
In paragraph 1, A coke oven gas purification device characterized by the flow rate of the mixed liquid supplied to the absorption tower by the booster pump being 13 m³ /H or more.

Description

Coke Oven Gas Purification Device {DEVICE FOR PURIFICATION OF COKE OVEN GAS} The present invention relates to a coke oven gas purification device, and more specifically, to a coke oven gas purification device that removes hydrogen sulfide and ammonia contained in coke oven gas together. Coke ovens used to produce coke generate coke oven gas (COG) as a byproduct during the dry distillation process; this coke oven gas is a major byproduct of the steelmaking process, used for power generation or as fuel within the steelworks. Since coke oven gas generated in the coke oven contains impurities such as hydrogen sulfide, ammonia, and BTX, a purification process is absolutely necessary before use. Among these, hydrogen sulfide is not only a major substance causing corrosion in coke oven gas transfer pipelines, but it must also be removed as it contains sulfur, a regulated emission substance. Additionally, ammonia must be removed because it reacts with carbon dioxide in coke oven gas or other byproduct gases to precipitate in the form of ammonium carbonate within the transfer pipelines, causing blockage. As shown in FIG. 1, which represents the prior art, a coke oven gas purification device is provided with a separate mixing device (30) between the absorption tower (10) and the regeneration tower (20), and the mixing device (30) mixes de-ammonium water and caustic soda and then re-supplies them to the absorption tower (10). However, there is a problem in that the supply flow rate of de-ammonium water and the supply flow rate of caustic soda are different from each other, so they are not mixed smoothly within the mixing device (30). The aforementioned background technology is one that the inventor possessed or acquired in the process of deriving the contents of the disclosure of the present application, and it cannot be considered as prior art disclosed to the general public prior to the filing of this application. FIG. 1 is a schematic diagram showing a coke oven gas purification device according to the prior art. FIG. 2 is a schematic diagram showing a coke oven gas purification device according to an embodiment of the present invention. FIG. 3 is a diagram showing the structure of a mixing strainer in a coke oven gas purification device according to an embodiment of the present invention. Hereinafter, embodiments are described in detail with reference to the attached drawings. However, various modifications may be made to the embodiments, and thus the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, and substitutions to the embodiments are included within the scope of the rights. The terms used in the embodiments are for illustrative purposes only and should not be interpreted as intended to be limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the embodiments pertain. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. In addition, when describing with reference to the attached drawings, identical components are assigned the same reference numeral regardless of drawing symbols, and redundant descriptions thereof are omitted. In describing the embodiments, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the embodiments, such detailed description is omitted. Additionally, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments. These terms are intended merely to distinguish the components from other components, and the nature, order, or sequence of the components is not limited by these terms. Where it is stated that a component is "connected," "combined," or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but that another component may also be "connected," "combined," or "joined" between each component. Components included in any one embodiment and components having common functions shall be described using the same names in other embodiments. Unless otherwise stated, the descriptions g