KR-200500334-Y1 - Dissociator having cleaning system

Abstract

The present invention relates to a concentration tower equipped with a cleaning system, and was developed to enable the removal of crystallized impurities inside the concentration tower without undergoing an overhaul process, which separates gas from a solution in which hydrogen sulfide is captured during the purification process of coke oven gas; the concentration tower formed in a cylindrical shape; a drain pipe formed at the bottom of the concentration tower and having a first discharge valve and a second discharge valve sequentially along a discharge path; a condensate pipe connected to the upper side of the concentration tower and having a first supply valve and a second supply valve sequentially along a supply path; a chemical tank in which a derust agent is stored; and a recovery pipeline branched between the first discharge valve and the second discharge valve of the drain pipe, having a recovery valve, and extending to the chemical tank. The present invention relates to a concentration tower equipped with a cleaning system characterized by comprising an input pipeline connected to the above-mentioned chemical tank, forcibly supplied by a pump, and connected between the first supply valve and the second supply valve via an input valve.

Inventors

• 서상범
• 허남균

Assignees

• (주)포스코퓨처엠

Dates

Publication Date

20260512

Application Date

20231207

Claims (2)

1. A cylindrical concentration tower (1) and; A drain pipe (11) formed at the bottom of the above-mentioned concentration tower (1) and having a first discharge valve (111) and a second discharge valve (112) sequentially along the discharge path; A condensate pipe (12) connected to the upper side of the above-mentioned concentration tower (1) and having a first supply valve (121) and a second supply valve (122) sequentially along a supply path; A chemical tank (2) in which a rust remover is stored; A recovery pipe (21) branched between the first discharge valve (111) and the second discharge valve (112) of the drain pipe (11) and extended to a chemical tank (2) and equipped with a recovery valve (211); A concentration tower for separating gas from a solution in which hydrogen sulfide is captured during the purification process of coke oven gas, equipped with a cleaning system characterized by being configured to include an input pipe (22) connected to the above chemical tank (2), forcibly supplied by a pump (221), and connected between the first supply valve (121) and the second supply valve (122) via an input valve (222).
2. In paragraph 1, Two or more of the above concentration towers (1) are formed, and the drain pipes (11) are connected from each concentration tower (1) to form a first discharge valve (111), then combined and extended to form a second discharge valve (112), and the recovery pipe (21) is connected before passing through the second discharge valve (112). A concentration tower for separating gas from a solution in which hydrogen sulfide is captured, in a purification process of coke oven gas equipped with a cleaning system characterized in that the above-mentioned condensate pipe (12) is branched and extended to each concentration tower (1) with a second supply valve (122) formed in the middle, and the input pipe (22) is configured to be connected to the branched part of the condensate pipe (12).

Description

Dissociator having cleaning system The present invention relates to a concentration tower equipped with a cleaning system, and more specifically, to a concentration tower equipped with a cleaning system developed to remove crystallized impurities inside the concentration tower without undergoing an overhaul process, which separates gas from a solution in which hydrogen sulfide is captured during the purification process of coke oven gas. Iron ore and coke are essential for iron production. Coke ovens, which are used to produce coke by processing coal, generate coke oven gas (COG) during the dry distillation process; this coke oven gas is used for power generation or as fuel within the steelworks. Coke oven gas contains hydrogen sulfide ( H₂S ) and ammonia ( NH₃ ) when generated in a coke oven, so it must undergo a purification process to remove them. In particular, hydrogen sulfide is a substance that causes metal corrosion and must be removed. For this purpose, ammonia, sodium hydroxide (NaOH), or amine-based absorbents are typically used; when ammonia water is used, the ammonia water that has captured hydrogen sulfide is used to remove the hydrogen sulfide in a dissociator and is then reused for hydrogen sulfide capture. However, when such a concentration tower is operated for a long time, crystals consisting of 92% calcium (Ca), 6% magnesium (Mg), and 1% sodium (Na) are formed inside, and these crystals are strongly bonded to the inner walls of the device, much like dental plaque, and gradually increase in size and extent, causing adverse effects on the operation of the device. Accordingly, these crystals are removed through an overhaul process in which the tower is periodically completely disassembled and reassembled. However, due to the size of the enrichment tower and the difficulty of the work, it usually takes a long time of 45 days. During this period, the enrichment tower cannot be operated, which inevitably reduces the efficiency of coke oven gas purification throughout the steelworks and has the disadvantage of incurring significant labor costs. FIG. 1 is a conceptual diagram according to one embodiment of the present invention. FIG. 2 is a conceptual diagram according to another embodiment of the present invention. In order to fully understand the operational advantages of the present invention and the objectives achieved by the embodiments of the present invention, one must refer to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings. The structure and operation of a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. Note that in assigning reference numerals to the components of each drawing, identical components are denoted by the same numeral whenever possible, even if they are shown in different drawings. Furthermore, the following embodiment may be modified in various different forms, and the scope of the present invention is not limited to the following embodiment. FIG. 1 is a conceptual diagram according to one embodiment of the present invention, comprising a concentration tower (1) formed in a cylindrical shape; A drain pipe (11) formed at the bottom of the above-mentioned concentration tower (1) and having a first discharge valve (111) and a second discharge valve (112) sequentially along the discharge path; A condensate pipe (12) connected to the upper side of the above-mentioned concentration tower (1) and having a first supply valve (121) and a second supply valve (122) sequentially along a supply path; A chemical tank (2) in which a rust remover is stored; A recovery pipe (21) branched between the first discharge valve (111) and the second discharge valve (112) of the drain pipe (11) and extended to a chemical tank (2) and equipped with a recovery valve (211); A concentration tower equipped with a cleaning system is shown, characterized by being configured to include an input pipe (22) connected to the above-mentioned chemical tank (2), forcibly supplied by a pump (221), and connected between the first supply valve (121) and the second supply valve (122) via an input valve (222). The present invention is intended to solve the problem where, in the case of a concentration tower (1) used in a large steel mill, the work time is 45 days and the cost is about 50 million won, in the process of disassembling all internal devices and removing strongly bonded substances such as tartar through the existing overhaul work. By using a reverse product called a rust remover or pipe cleaner diluted to a concentration of about 18%, the cleaning period is completed in one day and the chemical cost is reduced to 33 million won, which has an excellent effect. In particular, the operating time of the concentration tower (1) is increased dramatically, thereby preventing the reduction in the purification efficiency of the coke oven gas as much as