CN-117285942-B - Floating sealing method of dry quenching loading device

CN117285942BCN 117285942 BCN117285942 BCN 117285942BCN-117285942-B

Abstract

The invention relates to a floating sealing method of a dry quenching loading device, which adopts the floating sealing device of the dry quenching loading device and provides a method for pressurizing nitrogen in a floating sealing space, wherein the floating sealing device comprises a floating cover, a gas circuit control system, a water sealing groove, a floating cover sealing knife edge, a lower cone hopper, a sealing cavity and a lower cone hopper sealing knife edge, the water sealing groove is arranged below the lower cone hopper, the two sides of the lower cone hopper are provided with the floating cover, the lower cone hopper sealing knife edge (6) is arranged outside the edge of the lower cone hopper, and the floating cover sealing knife edge (2) is arranged on the bottom surface of the floating cover.

Inventors

CHEN JIANLIN
YUE XINXIAN
HE MAO
DING HAIQUAN

Assignees

上海梅山钢铁股份有限公司

Dates

Publication Date: 20260505
Application Date: 20220620

Claims (1)

1. A method for floating sealing of a dry quenching loading device is characterized in that the method adopts a floating sealing device of the dry quenching loading device and provides a method for nitrogen pressurization of a floating sealing space; The floating sealing device comprises a floating cover, an air path control system, a water seal tank, a floating cover sealing knife edge, a lower cone hopper, a sealing cavity and a lower cone hopper sealing knife edge, wherein the water seal tank is arranged below the lower cone hopper, the floating cover is arranged on two sides of the lower cone hopper, the lower cone hopper sealing knife edge is arranged outside the edge opening of the lower cone hopper, and the floating cover sealing knife edge is arranged on the bottom surface of the floating cover; The lower cone bucket sealing knife edge and the floating cover sealing knife edge are the same in height, and metal sealing knife edges are used, and a floating gap is formed between the floating cover sealing knife edge and the lower cone bucket sealing knife edge, so that the sealing knife edge is small in deformation and wear-resistant; 4 air charging ports are designed in the circumferential direction of the floating cover, and when the lower cone hopper and the upper and lower metal sealing knife edges of the bottom surface of the floating cover are matched to form a sealing cavity, the air path control system controls the nitrogen to be charged into the sealing cavity; The gas path control system comprises a gas source, a pressure reducing valve, an electromagnetic directional valve and a speed regulating valve, wherein the pressure reducing valve is arranged between the gas source and the electromagnetic directional valve; When the driving trolley is in place, the floating cover moves downwards to the bottom, and the sealing knife edge of the floating cover and the sealing knife edge of the lower cone bucket are matched to form a sealing cavity, so that a second layer of sealing protection is formed; When the dry quenching charging device is in a closing limit state, the floating cover is in an original position state, the electromagnetic directional valve of the gas circuit control system does not work, the gas circuit control system does not charge sealing nitrogen into the sealing cavity, when the charging device leaves the closing limit and walks towards an opening limit, the floating cover of the charging device moves downwards along the cam track, when the charging device reaches the opening limit, the sealing knife edge of the floating cover and the sealing knife edge of the lower cone bucket form the sealing cavity, at the moment, the gas circuit control system enables the electromagnetic directional valve to start to work, the gas circuit control system starts to charge high-pressure nitrogen into the sealing cavity, so that the sealing cavity of the charging device is filled with high-pressure nitrogen, in the coke charging process, the gas circuit control system continuously charges air into the sealing cavity, the charging pressure is controlled by the pressure reducing valve, the gas circuit control system enables the electromagnetic directional valve to stop working, and the gas circuit control system stops replenishing the high-pressure nitrogen into the sealing cavity to be opened after the charging device leaves the charging limit after the charging device is completed.

Description

Floating sealing method of dry quenching loading device Technical Field The invention relates to a sealing method, in particular to a floating sealing method of a dry quenching loading device, and belongs to the technical field of electromechanical equipment. Background The dry quenching charging device is arranged on a platform at the top of the dry quenching furnace and mainly comprises mechanical parts such as a hopper, a trolley, a furnace cover, a driving device, a dust collecting pipeline and the like, and is matched with a lifting machine to charge the red coke in a coke tank into the dry quenching furnace, and the structure is shown in figure 1, and the dry quenching charging device mainly has two functions of opening and closing the furnace cover and charging the red coke into the dry quenching furnace through the charging hopper. In the coke loading process of the dry quenching hoister, a coke lifting tank moves according to a set path, the coke tank filled with red coke is loaded into the dry quenching furnace, a large amount of dust is generated in the process, in order to prevent the dust from overflowing, a hopper at the lower part of the loading device is flexibly connected with a sealing cover capable of moving up and down, so that the dust is prevented from overflowing, the original sealing cover structure is shown in figure 2, and the problems are that 1, the red coke temperature in the coke loading process is up to about 1000 ℃, the single-layer high-temperature-resistant asbestos has short service life, and the single-layer high-temperature-resistant asbestos can be burnt in a normal working condition for no more than 50 days. If a plurality of layers of high-temperature-resistant asbestos cloth are used, the sealing cover is blocked from moving up and down, and can not be lifted by the counterweight, so that the cover is blocked in a water seal tank at the top of the furnace, and serious equipment accidents affecting the dry quenching production are caused. 2. After the high-temperature-resistant asbestos cloth is burnt, due to the characteristic of continuous production of the coke oven, the high temperature of the oven top, large maintenance load, long maintenance time and high maintenance cost are added, the burnt high-temperature-resistant asbestos cloth cannot be timely repaired, and a large amount of dust overflows when red coke is filled, so that the environment protection is seriously affected. 3. The sealing cover moves up and down and is lifted up and down by 4 chains, and is positioned by 4 guide rods with the diameter of 50mm when moving up and down, and because the chains are flexible connection and on-site high temperature factors, the sealing floating cover shakes left and right greatly when moving up and down, thereby aggravating the damage of high-temperature-resistant asbestos cloth and causing the problem that the guide rods are easy to block. 4. Asbestos itself is a toxic and harmful substance, and environmental protection requires limited use. The root causes of the short service life of the seal cover of the dry quenching loading device are mainly that 1, the red coke temperature which is about 1000 ℃ in the coke loading process is directly used for baking seal materials such as asbestos cloth and the like, so that the seal materials are very easy to burn and damage, 2, the seal cover moves up and down to continuously pull high-temperature-resistant asbestos cloth to cause the breakage of the asbestos cloth, and 3, the seal cover is small in floatable quantity and easy to cause the blockage of a guide rod due to the use of multiple layers of high-temperature-resistant asbestos cloth. Although some improvement and treatment technologies for sealing the loading device exist at home and abroad, the installation modes of the sealing element such as materials, thickness and the like are mainly perfected, and the problems that the service life of the sealing element is short, the environment protection is affected by dust overflow, the production is affected by floating cover blocking and the like are not fundamentally solved. Therefore, a new solution is urgently needed to solve the above technical problems. Disclosure of Invention The invention provides a floating sealing method of a dry quenching loading device, which aims at the problems existing in the prior art, the technical proposal eliminates the defects in the use process of the prior sealing cover, meets the requirements of dry quenching safety and environmental protection production, and radically improves the structure of the sealing cover of the dry quenching loading device by adopting a brand new floating sealing mode, thereby prolonging the service life of the sealing cover. In order to achieve the above purpose, the technical scheme of the invention is as follows, a method for floating sealing a dry quenching loading device is adopted, and a method for nitrogen pressurization of a floating sealing space