CN-116920523-B - Tar residue preseparation device capable of realizing self-cleaning

Abstract

The invention relates to a tar residue pre-separation device capable of realizing self-cleaning, which comprises a separator shell, a material inlet, a material outlet, a feed opening, a sieve plate inlet, a sieve plate guide rail, a material returning opening, a material returning pipe, a tar residue pump, a pre-separator support and a sieve plate, wherein the material inlet is welded and fixed on an upper cylinder of the separator shell, the material outlet is welded and fixed on the upper cylinder of the separator shell, the material inlet and the material outlet are respectively positioned on two opposite surfaces of the upper cylinder of the separator shell, and the feed opening is fixed at the bottom of the separator shell; the technical scheme can effectively separate large tar residue particles in condensate, and solves the problems of screen plate mesh blockage, gear abrasion of a residue scraping machine, guide rod deformation, chain falling and the like in the residue scraping process.

Inventors

• GUO JING
• ZHOU TIANTIAN
• JI YILONG
• YUE XINXIAN
• CUI XIAOJIANG

Assignees

• 上海梅山钢铁股份有限公司

Dates

Publication Date

20260505

Application Date

20220330

Claims (1)

1. 1. The device is characterized by comprising a separator shell, a material inlet, a material outlet, a blanking port, a sieve plate inlet, a sieve plate guide rail, a return port, a return pipe, a tar residue pump, a pre-separator support and a sieve plate, wherein the separator shell comprises a cylindrical barrel-shaped upper half part and a cone-shaped lower half part, the material inlet is welded and fixed on the upper barrel of the separator shell, the material outlet is welded and fixed on the upper barrel of the separator shell, the material inlet and the material outlet are respectively positioned on two opposite sides of the upper barrel of the separator shell, the blanking port is fixed at the bottom of the separator shell, the return pipe is welded and fixed at the top of the separator shell, the return pipe is respectively connected with the blanking port, the tar residue pump and the return port by flanges, the pre-separator support is welded and fixed at the bottom of the separator shell, and the inlet is welded and fixed at the top of the separator shell; The inlet of the sieve plate is rectangular and is connected with the cylinder body at the upper part of the shell in a welding mode; a sieve plate guide rail is arranged in the shell barrel body, the sieve plate guide rail is made of stainless steel channel steel, one end of the bottom of the channel steel is closed, the effect of limiting the sieve plate is achieved, and the top of the guide rail is welded in an upper cover plate of the shell barrel body; The screen plate consists of a front plate, a rear plate, an upper plate, a lower plate, a left plate, a right plate, a filtering hole, a vent pipe and an electric tracing band, wherein the filtering hole, the vent pipe and the electric tracing band are arranged in the screen plate; the front plate and the rear plate are respectively provided with a plurality of round holes, the number of the round holes on the front plate is the same as that of the round holes on the rear plate, and the front holes and the rear holes are positioned on the same axis and correspond to each other one by one; the air pipe is arranged in the sieve plate, the contact surface of the air pipe and the sieve plate is connected in a welding mode, the air pipe is provided with an air inlet outside the sieve plate, and the air pipe is provided with a plurality of branches inside the sieve plate, wherein the number of the branches is consistent with that of the filtering holes; The filtering holes are formed by rolling stainless steel sheets, and have a cylindrical appearance, a cylindrical structure with an inner layer and an outer layer and a hollow interior, wherein the front end surface and the rear end surface of the cylinder are different in structure, the front end surface is a round surface, and the edges of the round surface are in a closed round shape; The electric tracing band is wound on the outer side of the filtering hole and is of a flat band-shaped structure, and the structure mainly comprises a copper core wire, a heating resistor body, an insulating layer, a shielding layer and an outer protective layer.

Description

Tar residue preseparation device capable of realizing self-cleaning Technical Field The invention relates to a separation device, in particular to a tar residue pre-separation device capable of realizing self-cleaning, and belongs to the technical field of control of coking equipment. Background Raw gas from a coke oven is separated from liquid phase (ammonia water, tar and tar residues) by a gas suction main pipe, the gas enters a horizontal pipe primary cooler which is operated in parallel, desulfurization liquid, circulating water and low-temperature water are respectively used for cooling the gas at the upper section, the middle section and the lower section of the horizontal pipe primary cooler, and the cooled gas enters an electric tar precipitator which is operated in parallel, and is sent to a naphthalene washing device by a blower after entrained tar is removed. Condensate discharged by the horizontal pipe primary cooler flows into the condensate tank through the water seal tank, is conveyed to the gas suction pipeline by a pump, and finally returns to the tar ammonia water separation tank. Tar and ammonia water from the gas suction pipe enter a tar residue pre-separation device, and the tar ammonia water and the tar residue are separated. A sieve plate is arranged at the outlet of the tar residue preseparation device, so that large-particle solids are left in the preseparator and are settled to the conical bottom of the preseparator, and are pumped out by a tar squeezing pump. In the tar-pressing pump the solid matter is crushed and returned to the upper part of the tar residue preseparation device. The tar residue pre-separation device is used for separating and treating large-particle tar residues in condensate. The large-particle tar residues intercepted by the sieve plate can fall into the bottom of the preseparator, then enter the tar squeezing pump from the bottom of the preseparator, are crushed into small particles by the tar squeezing pump, are returned to the tar residue preseparator together with condensate, and are sieved again by the sieve plate until the large-particle tar residues are crushed into small particles capable of passing through the sieve plate. The core component in the tar residue pre-separation device is a sieve plate and a residue scraping system. Large-particle tar residues are screened out because they cannot pass through the meshes of the screen plate. The sieve plate is correspondingly provided with a slag scraping system which is used for scraping the large-particle tar slag remained on the sieve plate, so that the large-particle tar slag falls into a tar pressing pump at the bottom of the preseparator. The slag scraping system mainly comprises a motor, a speed reducer, a chain, a gear, a positioning guide rod, a scraping plate and other parts, wherein the motor provides power, the scraping plate is driven to repeatedly move up and down through a transmission device such as the speed reducer, the chain and the gear, the scraping plate is in direct contact with the sieve plate, and the sieve plate is rubbed to scrape residual large-particle tar slag on the sieve plate through the up-down movement of the scraping plate. The slag scraping system of the tar slag pre-separation device has the following problems that firstly, large-particle tar slag is mixed with coal dust, semicoke and the like in coal tar to form agglomerates with different sizes, and the large-particle tar slag is sticky waste slag, and the main components of the large-particle tar slag comprise coal dust, coke dust, asphalt powder and the like. Large-particle tar slag is easy to adhere and block on meshes of a sieve plate of the tar slag pre-separation device, and repeated slag scraping of a scraper of a slag scraper can enable the large-particle tar slag to be rolled into flat blocky sticky matters, so that the meshes of the sieve plate are easier to block. The self weight of the scraping plate is large, the stress is uneven in the process that the chain drives the scraping plate to move up and down, the radial acting force of the chain is large on the gear, so that the gear shaft is bent and deformed, the gear is deviated, the chain is easy to fall off, and the gear, the chain and the guide rod are always stressed greatly in the same transmission process, so that the gear and the chain are seriously worn, and the guide rod is deformed. Therefore, a new solution is urgently needed to solve the above technical problems. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides the tar residue pre-separation device capable of realizing self-cleaning, the technical scheme can effectively separate large tar residue particles in condensate, the function of removing large-particle tar residues on a sieve plate can be realized without a residue scraping system, and the problems of sieve plate mesh blockage, residue scraping machine gear abrasion, guide rod deformati