CN-121975535-A - Method for online replacement of small grinding plate of coke oven

CN121975535ACN 121975535 ACN121975535 ACN 121975535ACN-121975535-A

Abstract

The invention discloses a method for replacing a small grinding plate of a coke oven on line, which comprises the steps of pushing a whole set of protection tools to the lower part of the number of the coke oven to be operated, opening a furnace door, enabling the whole set of protection tools to be close to the furnace body, enabling a heat insulation baffle in front to extend to the inside of a carbonization chamber, blocking heat radiation of red coke in the carbonization chamber, preventing a furnace end from collapsing coke to a certain extent, opening a pedal plate to be flush with a coke dripping plate of the coke oven, fixing a travelling wheel of a foot, enabling personnel to go up and down a platform through an outer travelling ladder, enabling the platform to be flush with the small grinding plate, opening the pedal plate, enabling the personnel to be close to the furnace body through the pedal plate, removing the old small grinding plate, cleaning the installation position of the small grinding plate, installing a new small grinding plate, and finally grouting, repairing the periphery of the newly installed small grinding plate, checking the compression condition of ceramic fiber braided ropes at the position of the furnace door frame and the protection plate, if the situation of the small grinding plate should not be tightly, checking the installation condition of the furnace door frame and the protection plate, and ensuring that the positions of the small grinding plate are correct and firm connection.

Inventors

LUO CHUNJIA
LI CHUNYAN
SHI XIAOLONG
CUI YAN
LI WEI
XU JUN
LI FUCHENG
ZUO HAIFENG
CUI JIAN

Assignees

内蒙古包钢钢联股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260318

Claims (8)

1. A method for replacing a small grinding plate of a coke oven on line is characterized by comprising the following specific steps: (1) Before operation, checking the size of the new grinding plate, and preparing needed tools and materials; (2) According to the coke pushing serial sequence of the coke oven, the oven door is taken off 2 hours before coke pushing, meanwhile, the normal coke pushing production of the coke oven is not influenced, the coke guide is utilized to avoid the discharge number by using a standby vehicle, the oven door is taken off, and then the standby vehicle stops production and takes necessary safety measures; (3) Removing the old grinding plate, loosening the cross iron screws for fixing the small grinding plate by using an electric wrench or removing the screws to remove the cross iron, and then removing the old grinding plate from the furnace door frame; (4) Cleaning the mounting position, cleaning the mounting surface on the furnace door frame, removing residual tar graphite, dust and old sealing materials, and ensuring the flatness and cleanliness of the mounting surface; (5) Installing a new grinding plate, placing the new grinding plate on the installation position of the furnace door frame, aligning the installation holes, installing cross irons and screwing down screws; (6) When a new small grinding plate is replaced or installed, a whole set of protection tools are pushed to move below a furnace number to be operated, after the furnace door is opened, the whole set of protection tools are close to the furnace body, so that the heat insulation baffle in front of the protection tools just stretches into the carbonization chamber to block the heat radiation of red coke in the carbonization chamber, meanwhile, the furnace end is prevented from collapsing coke to a certain extent, the pedal is opened to be level with the coke dripping plate of the coke oven, the walking wheels of feet are fixed, and the operation is started; (7) When in operation, a person goes up and down the platform through the walking ladder on the outer side, the platform is level with the height of the small grinding plate, after the pedal is opened, the person approaches the furnace body through the pedal, removes the old small grinding plate, cleans the installation position of the small grinding plate, installs a new small grinding plate, and finally performs grouting; (8) Performing subsequent treatment, namely grouting and smearing the periphery of the newly installed small grinding plate, checking the pressing condition of the ceramic fiber braided rope at the furnace door frame and the protection plate, and if the pressing condition is not tight, tamping the ceramic fiber braided rope as much as possible, checking the installation condition of the grinding plate after the furnace door frame and the protection plate are completely installed, so as to ensure the correct position and firm connection of the grinding plate; (9) Then, relevant debugging work is carried out.
2. The method for on-line replacing small grinding plates of coke ovens according to claim 1, wherein the tools and materials required in the step 1 comprise electric wrenches, pneumatic picks, crowbars, air pipes (provided with air sources) and clay fireclay.
3. The method for online replacement of small grinding plates of coke ovens according to claim 1, wherein the safety measures in the step 2 comprise power-off and warning of hang-up.
4. The method for on-line replacement of small grinding plates of coke ovens according to claim 1, wherein in step 5, when screws are tightened, the grinding plates are firmly installed and are lower than the oven bottom, and the oven door frame surface is not beyond the edge of the oven bricks.
5. The method for on-line replacing small grinding plate of coke oven as claimed in claim 1, wherein after the operation is finished, the foot pedal is retracted, the whole set of protection tool is pushed to move away from the production furnace area, and normal production can be restored to the upper furnace door.
6. The method for on-line replacement of a small grind plate of a coke oven according to claim 1, wherein the step 9 of adjusting includes checking the sealing between the oven door and the grind plate.
7. The method for on-line replacement of small grinding plates of coke ovens according to claim 1, wherein the furnace number Jiao Ceshao to be treated is charged with 3-4 m in advance when a new small grinding plate is replaced or installed in step 6.
8. The method for replacing small grinding plates of coke ovens on line according to claim 1, wherein the small grinding plates are replaced by picking up the oven door from the end of a coking cycle after one coking cycle, and the small grinding plates are generally selected to be rarely filled when coal is charged after pushing coke in the previous coking cycle.

Description

Method for online replacement of small grinding plate of coke oven Technical Field The invention relates to the field of coke oven production in the coking industry, in particular to a method for online replacement of a small grinding plate of a coke oven. Background The small grinding plate is a furnace protection iron piece for protecting the coke furnace masonry from damage, is generally made of steel or cast iron, and has the main effects of facilitating coke pushing and preventing coke from remaining, and provides a smooth contact surface for the coke pushing rod in the coke pushing process, so that friction between the coke pushing rod and the furnace bottom is reduced, meanwhile, the coke can be prevented from accumulating near the furnace door, the furnace door can be ensured to be smoothly closed and sealed, and smoking caused by the untight sealing of the furnace door is avoided. In addition, the small grinding plate can also protect the bottom bricks and the bottom of the furnace door frame, and reduce the abrasion of the furnace door frame by the coke pushing rod and the coke. The core purpose of the replacement of the small grinding plate is to avoid production failure and potential safety hazards of the coke oven caused by abrasion failure of the small grinding plate, excessive abrasion and even loss of the small grinding plate can cause clamping stagnation and abnormal sound of a coke pushing rod, the coke pushing resistance is suddenly increased and even coke pushing equipment is damaged possibly, the small grinding plate cannot block coke to be accumulated near an oven door after abrasion or loss, the sealing effect of the oven door and an oven door frame can be damaged, raw gas in a carbonization chamber is leaked, the failed small grinding plate can enable the coke pushing rod and the coke to directly rub the bottom of the oven door frame, furnace protecting iron parts are accelerated to be damaged, and the bottom bricks can be pushed out of the carbonization chamber, so that the service life of the coke oven is shortened. Therefore, the small grinding plate is extremely easy to damage or lose due to long-term use abrasion, the coke side furnace door is even more, and when the small grinding plate is abnormal or lost, the small grinding plate should be replaced in time. In order to standardize the operation flow, not stop production and repair damaged small grinding plates, ensure continuous and stable operation of the coke oven, reduce production interruption loss, correct the problems of deformation, displacement or deletion of the small grinding plates in time, accurately control the sizes of brick joints and brickworks, stop smoke blowby and heat loss, avoid serious accidents such as cracking and brick dropping of furnace wall bottom bricks caused by defect expansion, reduce overhaul cost, prolong the service life of the coke oven, and simultaneously avoid the hidden trouble that the deformation of the small grinding plates and the damage of the coke oven brickworks are caused by illegal disassembly and damage of furnace heads and coke collapse affect the safety of operators when the small grinding plates are replaced, the invention provides a method for replacing the small grinding plates on line. Simultaneously, the matching tool is provided, the problem that the safety of operators is affected by the collapse of the furnace end when the small grinding plate is replaced is solved, meanwhile, an operation platform for replacing the small grinding plate is built, the operators can conveniently stand on the operation platform to operate, and the physical isolation effect of the operators and red coke in the carbonization chamber is enhanced. Disclosure of Invention The invention aims to provide a method for online replacement of a small grinding plate of a coke oven, which aims to solve the problems in the background technology. In order to achieve the above object, the present invention provides the following technical solutions; A method for replacing a small grinding plate of a coke oven on line comprises the following specific steps: (1) Before operation, checking the size of the new grinding plate, and preparing needed tools and materials; (2) According to the coke pushing serial sequence of the coke oven, the oven door is taken off 2 hours before coke pushing, meanwhile, the normal coke pushing production of the coke oven is not influenced, the coke guide is utilized to avoid the discharge number by using a standby vehicle, the oven door is taken off, and then the standby vehicle stops production and takes necessary safety measures; (3) Removing the old grinding plate, loosening the cross iron screws for fixing the small grinding plate by using an electric wrench or removing the screws to remove the cross iron, and then removing the old grinding plate from the furnace door frame; (4) Cleaning the mounting position, cleaning the mounting surface on the furnace door frame, removing