Device and method for cleaning coke at mouth of carbonization chamber of coke oven

Abstract

The invention discloses a coke oven carbonization chamber mouth coke cleaning device and a coke oven carbonization chamber mouth coke cleaning method, and the coke oven carbonization chamber mouth coke cleaning device comprises a way of mouth purging nozzles which are respectively arranged on left and right oven columns of a coke oven carbonization chamber and face a coke dripping plate at the bottom of the coke oven carbonization chamber mouth; and the compressed air supply system is connected with the furnace mouth purging nozzle. The device is used for cleaning coke at the oven mouth of the coke oven carbonization chamber and comprises the following two steps: step 1) after a coke pushing rod of a coke pusher retreats from the coke oven carbonization chamber, blowing compressed air from an oven mouth purging nozzle to clean the oven mouth at the machine side of the coke oven carbonization chamber, and closing an oven door to stop cleaning; and 2) after coke pushing is completed and the coke guide grid of the coke guide car exits from the furnace mouth, blowing compressed air from the furnace mouth purging nozzle to clean the coke side furnace mouth of the coke oven carbonization chamber, closing the furnace door and stopping cleaning, thereby completing the coke oven carbonization chamber furnace mouth cleaning. And through automatic mechanical equipment, the manual operation time is shortened, the working efficiency is improved, and the risks of heatstroke and mechanical injury of furnace discharging workers are reduced.

Description

Technical Field

[0001] The invention relates to the field of coking and coking, and in particular to a device and method for cleaning coke at a coke oven carbonization chamber mouth. Background Art

[0002] In a reheating top-loading coke oven with a coke pusher and a coke guide car, coal is loaded from the furnace top by a coal loading car. The loaded coal undergoes drying and preheating, thermal decomposition, colloid production, colloid solidification, semi-coke shrinkage and conversion of semi-coke into coke in an air-isolated carbonization chamber. After the fire falls (i.e. the coke is mature), the coke pusher and the coke guide car remove the coke side furnace door, the coke pusher pushes the coal out, and the coke guide car guides the coke into the tram (transport car) and then sends it to the dry coke quenching cooling chamber.

[0003] When the coke pusher and coke guide car remove the furnace door, after the coke push is completed, the coke pusher rod returns to the rear position. Due to the gap between the coke pusher rod and the bottom and side of the coke oven, the coke cannot be 100% removed from the coke oven after the coke push is completed, and some residual coke will be scattered at the bottom of the coke oven. In particular, the coke scattered at the bottom of the coke oven mouth affects the fit of the coke pusher and coke guide car furnace doors after closing, and cannot be handled afterwards, but must be cleaned up immediately to ensure the sealing of the carbonization chamber after the furnace door is closed.

[0004] At present, the coke (red coke) at the bottom of the carbonization chamber is shoveled by the unloading workers into the coke receiving port of the coke pusher and coke guide car or pushed into the carbonization chamber of the coke oven to ensure the cleanliness of the coke oven mouth and the good sealing of the carbonization chamber after the coke oven door is closed. The existing operation mainly has the following problems:

[0005] 1. The working environment is harsh. The temperature at the furnace mouth of the carbonization chamber is about 1000℃. The furnace workers use iron shovels to scrape the scattered coke (red coke) into the water trough in front of the furnace. When the red coke meets water, it will emit a large amount of water vapor, which affects the vision of the furnace workers and poses safety risks in their work. The heat radiation in the carbonization chamber also affects the health of the furnace workers.

[0006] 2. The operation affects the time of coke oven output. A group of coke ovens can produce 130 coke ovens in one day (24 hours). The operation time of cleaning the coke plate of each oven is 1 minute. The time affected every day is 130 minutes.

[0007] 3. The manual cleaning effect is poor. When cleaning the coke oven mouth manually, it is necessary to use a scraper to scrape off the graphite adhering to the bottom of the mouth and clean the residual coke at the mouth into the scraper in front of the furnace. Due to time constraints, the manual cleaning effect is poor and the cleaning is not thorough.

[0008] 4. The cleaning work of the furnace workers needs to be carried out near the front of the furnace, and there is a lot of interaction with the coke oven vehicles, which can easily cause mechanical injury accidents. Summary of the invention

[0009] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a coke cleaning device and method for a coke oven carbonization chamber mouth.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A device for cleaning coke at the furnace mouth of a coke oven carbonization chamber, the device comprising furnace mouth purge nozzles respectively arranged on the furnace columns on the left and right sides of the coke oven carbonization chamber and directed toward the coke plate flowing at the bottom of the furnace mouth of the coke oven carbonization chamber, and a compressed air supply system connected to the furnace mouth purge nozzles.

[0012] Furthermore, the compressed air supply system includes a compressed air tank, a compressed air solenoid valve, a compressed air pipeline and a ground purge control device for controlling the compressed air solenoid valve.

[0013] Furthermore, the furnace mouth purge nozzle is a hard bellows, and the compressed air pipeline is made of steel.

[0014] Furthermore, the present invention also discloses a method for cleaning coke at the mouth of a coke oven carbonization chamber, comprising the following steps:

[0015] Step 1) after the coke pushing rod of the coke pushing car exits the coke oven carbonization chamber and before the furnace door is closed, the floor purge control device controls the furnace mouth purge nozzle to blow out compressed air to clean the machine side furnace mouth of the coke oven carbonization chamber, and the coke pushing car stops cleaning when closing the furnace door of the coke oven carbonization chamber;

[0016] Step 2) After the coke pushing is completed, after the coke guiding grid of the coke guiding car exits the furnace mouth and before the furnace door is closed, the furnace mouth purge nozzle is controlled by the ground purge control device to blow out compressed air to clean the coke side furnace mouth of the coke oven carbonization chamber. The coke guiding car stops cleaning when closing the furnace door of the coke oven carbonization chamber, and the cleaning of the furnace mouth of the coke oven carbonization chamber is completed.

[0017] The beneficial effects of the present invention are: (1) the main equipment of the present invention is completely installed on the coke oven, and the stability of the equipment operation is guaranteed, such as vibration, high-temperature open flame, compressed air stability, power supply stability and other advantages; (2) when using compressed air purging, the problem of graphite accumulation at the bottom corners of the carbonization chamber is solved, and the flow of a large amount of air accelerates the combustion of graphite, reduces the condition of graphite accumulation at the bottom of the furnace, and closes the furnace door more closely and has better sealing, which is beneficial to environmental protection requirements; (3) compared with people using a shovel to sweep and clean, using compressed air purging is a flexible cleaning method, which is beneficial to protecting the brick surface of the furnace bottom and the furnace frame, and prolongs the service life of the refractory bricks at the bottom of the carbonization chamber furnace mouth; (4) the present invention is independent of the coke oven locomotive system, does not affect the fully automatic operation interlocking state of the coke oven locomotive, and equipment abnormalities do not affect the smooth progress of the production process.

[0018] The present invention automatically cleans the coke plate at the bottom of the coke oven carbonization chamber through the furnace mouth purge nozzle, thereby realizing the automatic cleaning of coke and graphite at the furnace mouth of the carbonization chamber during the coke oven unloading process. The current manual cleaning device of the coke oven furnace mouth is replaced by the automatic mechanical equipment, thereby reducing the manual operation time, improving the work efficiency, and reducing the risk of heat stroke and mechanical injury of the unloading workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a coke cleaning device at a coke oven carbonization chamber mouth of the present invention;

[0020] Figure 2 This is a front view of the arrangement of the furnace mouth purge nozzles of the present invention;

[0021] Figure 3 It is a left view of the arrangement of the furnace mouth purge nozzles of the present invention;

[0022] Figure 4 This is a schematic diagram of the coke oven machine side furnace opening cleaning control logic of the present invention;

[0023] Figure 5 It is a schematic diagram of the cleaning control logic of the coke side oven mouth of the coke oven of the present invention;

[0024] Names of the numbers in the figure: 1- compressed air tank, 2- compressed air solenoid valve, 3- compressed air pipeline, 4- furnace mouth purge nozzle, 5- ground purge control device, 6- ground purge control device signal transceiver station, 7- coke oven locomotive signal transceiver station, 8- bottom of coke oven carbonization chamber furnace mouth, 9- left column line of coke oven, 10- right column line of coke oven, 11- furnace mouth coke flowing plate. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the embodiments. Figure 1 , Figure 2 , Figure 3 As shown, a coke cleaning device for the coke at the furnace mouth of the carbonization chamber of a coke oven is provided on the furnace columns 9 and 10 on the left and right sides of the coke oven carbonization chamber, respectively, with a furnace mouth purge nozzle 4 for flowing coke plates toward the bottom 8 of the furnace mouth of the coke oven carbonization chamber, and a compressed air supply system connected to the furnace mouth purge nozzle 4. The compressed air supply system includes a compressed air tank 1, a compressed air solenoid valve 2, a compressed air pipeline 3 and a ground purge control device 5 for controlling the compressed air solenoid valve 2. Taking the coke pusher of Baosteel in Zhanjiang as an example, the steps of the method for cleaning coke at the furnace mouth of the coke oven carbonization chamber are as follows:

[0026] Step 1) Figure 4As shown, the coke oven machine side furnace mouth is cleaned. After the coke pusher rod of the coke pusher exits the furnace mouth and before the furnace door is closed, the current operation furnace number position of the coke pusher and the furnace mouth purge operation signal are sent to the ground purge control device 5 through the radio station; the ground purge control device 5 performs the opening instruction of the compressed air solenoid valve 2 of the corresponding operation furnace number according to the received operation furnace number position and furnace mouth purge operation signal, and the carbonization chamber furnace mouth purge nozzle 4 of the corresponding operation furnace number blows out compressed air to blow the coke remaining at the bottom 8 of the carbonization chamber furnace mouth into the carbonization chamber, clean the coke at the carbonization chamber furnace mouth, and accelerate the combustion of graphite at the carbonization furnace mouth.

[0027] System stop: When the coke pusher is closing the carbonization chamber door, the operating furnace number position and the purge operation stop signal are sent to the ground purge control device 5 through the radio station; the ground purge control device 5 issues a closing instruction for the compressed air solenoid valve 2 of the corresponding operating furnace number according to the received operating furnace number position and the purge operation stop signal.

[0028] Step 2) Figure 5 As shown, the coke side of the coke oven is cleaned. After the coke pushing is completed, after the coke guide grid of the coke guide car exits the oven mouth and before the oven door is closed, the current operation furnace number position of the coke pusher and the oven mouth purge operation signal are sent to the ground purge control device 5 through the radio station; the ground purge control device performs the opening instruction of the compressed air solenoid valve 2 of the corresponding operation furnace number according to the received operation furnace number position and the oven mouth purge operation signal, and the carbonization chamber oven mouth purge nozzle 4 of the corresponding operation furnace number blows out compressed air to blow the coke remaining at the bottom 8 of the carbonization chamber oven mouth into the interior of the carbonization chamber, clean the coke at the carbonization chamber oven mouth, and accelerate the combustion of graphite at the carbonization oven mouth.

[0029] System stop: When the coke guide vehicle closes the carbonization chamber door, it sends the operating furnace number position and the purge operation stop signal to the ground purge control device 5 through the radio station; the ground purge control device 5 executes the closing instruction of the compressed air solenoid valve 2 of the corresponding operating furnace number according to the received operating furnace number position and the purge operation stop signal to complete the cleaning of the furnace mouth of the coke oven carbonization chamber.

[0030] There are two modes to choose from for the coke cleaning operation at the mouth of the coke oven carbonization chamber: fully automatic mode and manual mode.

[0031] The furnace mouth purge nozzle 4 is a hard corrugated pipe with certain rigidity and plasticity. The position of the furnace mouth purge nozzle 4 can be adjusted according to the different conditions of each furnace mouth to meet the on-site usage conditions. The compressed air pipeline 3 is a steel product, and the size of the compressed air pipe and nozzle can be adjusted according to the on-site conditions to adapt to the on-site conditions.

[0032] System maintenance: The cleaning device is a fixed device. Compared with other automatic cleaning devices, the main maintenance is the maintenance of the compressed air solenoid valve 2. The installation position of the furnace mouth purge nozzle 4 is basically at ambient temperature and does not need to be operated. The electrical equipment is installed in the ambient temperature to avoid equipment aging, accelerated damage, etc.

[0033] The above contents are only used to illustrate the technical solution of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention made by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A coke cleaning device for a coke oven carbonization chamber, characterized in that: The device comprises a furnace mouth purge nozzle arranged on the left and right furnace columns of the coke oven carbonization chamber, one of which is directed toward the coke plate flowing at the bottom of the furnace mouth of the coke oven carbonization chamber, and a compressed air supply system connected to the furnace mouth purge nozzle.

2. The coke cleaning device for the carbonization chamber of a coke oven according to claim 1, characterized in that: The compressed air supply system includes a compressed air tank, a compressed air solenoid valve, a compressed air pipeline and a ground purge control device for controlling the compressed air solenoid valve.

3. The coke cleaning device for the carbonization chamber of a coke oven according to claim 2, characterized in that: The furnace mouth purge nozzle is a hard bellows, and the compressed air pipeline is made of steel.

4. A method for cleaning coke at the mouth of a coke oven carbonization chamber, characterized in that: The method comprises the following steps: Step 1) after the coke pushing rod of the coke pushing car exits the coke oven carbonization chamber and before the furnace door is closed, the floor purge control device controls the furnace mouth purge nozzle to blow out compressed air to clean the machine side furnace mouth of the coke oven carbonization chamber, and the coke pushing car stops cleaning when closing the furnace door of the coke oven carbonization chamber; Step 2) After the coke pushing is completed, after the coke guiding grid of the coke guiding car exits the furnace mouth and before the furnace door is closed, the furnace mouth purge nozzle is controlled by the ground purge control device to blow out compressed air to clean the coke side furnace mouth of the coke oven carbonization chamber. The coke guiding car stops cleaning when closing the furnace door of the coke oven carbonization chamber, and the cleaning of the furnace mouth of the coke oven carbonization chamber is completed.

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