Shanxi Coke Oven Ground Dust Removal Station | Coke Oven Dust Removal Bag Dust Removal Device

10,000 tons coke oven ground dust removal station
Process flow and main technical indicators
Coking dust removal, coke oven smoke elimination and dust removal, ground dust removal station, coke pushing dust removal,
Service items:
1 , Coal coking smoke elimination and dust removal ground station project
2. Dust control and sewage treatment project
3. Various non-standard bag dust removal equipment and accessories
. Process flow
Coke oven floor The process flow of the dust removal station is shown in the figure. The dust removal system consists of a centrifugal fan, main motor, frequency converter, instrument system, circulating cooling water system, compressed air system and pipe network system. During the coking production process, the smoke and dust are sucked into the main dust collection pipe through the duct, and the large particles of dust are separated in the gravity dust collector and flow directly into the ash hopper. After the smaller dust evenly enters the box in the middle of the bag dust collector, it is adsorbed on the outer surface of the filter bag. The dust-containing gas enters the clean air chamber after being filtered by the filter bag, and is discharged into the atmosphere through the exhaust pipe. When the resistance of the filter bag reaches the limit value, the dust cleaning device opens the electronically controlled pulse valve according to the differential pressure program for pulse injection. At this time, the compressed air shakes off the dust attached to the surface of the filter bag, and is discharged from the ash discharge mechanism through the ash hopper. This dust removal system adopts automatic control technology and is centrally monitored by the control room in the dust removal ground station. It is also equipped with a manual control switch for easy maintenance.
Coking dust removal, coke oven smoke and dust removal, ground dust removal station, coke pushing and dust removal,
Service items:
1. Coal coking smoke and dust removal ground station project
2. Dust control and sewage treatment projects
3. Various non-standard bag dust removal equipment and accessories
Coke oven ground dust removal station
Process flow
This process uses two dry dust removal methods for coal loading and coke removal Integrated technology combines coal loading dust removal and coke removal dust removal into a dust removal system. It uses the coke powder adsorbed on the filter bag during the coke removal dust removal process as a coating to prevent the tar and dust in the flue gas from being inhaled during the coal loading process. Do not come into direct contact with the filter bag. The coke discharge dust removal and coal loading dust removal operate alternately to ensure that the filter bag can be used for a long time without being stuck and blocked. The advantage of the system is that the two subsystems of coal loading dust removal and coke discharge dust removal share the same dust collector, typhoon fan and stacked ash storage device. The dust collector adopts an offline pulse bag dust collector, and the filter material is a new type of anti-static needle felt air filter.
Improvements in process design
.A gravity dust collector is added before bag dust removal
During the dust removal process, larger smoke particles are sucked into the dust removal main pipe through the duct, and larger coke particles are The temperature is often high and the bag is easily damaged. In this way, it can be separated in the gravity dust collector and flow directly into the ash hopper at the bottom of the gravity dust collector. The smaller smoke particles evenly enter the box in the middle of the bag dust collector and are adsorbed on the outer surface of the filter bag. , can reduce the adsorption amount of bag dust collector, effectively protect the bag and extend its service life.
. Add a cold air valve at the front end of the main dust removal pipe
When the coke oven is loaded with coal, the coal contacts the hot wall of the carbonization chamber, resulting in a large amount of smoke and dust. When the coke is pushed, the high-temperature coke will rupture after being pushed out of the carbonization chamber. It burns in the air, and the smoke and charred dust produced are dispersed into the air. These two parts of flue gas not only contain large amounts of dust, but also have high temperatures. In order to effectively protect the bag from being burned by high-temperature exhaust gas, cold air is quickly mixed through the cold air valve after starting coal loading and coke removal and dust removal, so that the temperature of the bag is quickly reduced.
.Add an anti-surge valve before the gravity dust collector and before entering the bag dust collector
When the dust removal system is operating normally, the variable frequency fan is pre-set for coal loading and coke removal according to the requirements of the coke oven dust removal efficiency. operating frequency. However, in the actual operation process, considering that the frequency of the fan may increase abnormally or the suction of the dust removal main pipe may suddenly increase, the main dust removal pipe may be damaged or other unsafe factors may occur. In order to avoid these unsafe factors, two anti-surge valves (valve that opens automatically when suction is exceeded) are added to the dust removal main pipe. During the coal loading or coke removal process, once the suction in the main pipe exceeds the standard, the anti-surge valve will automatically open. Ensure the safe operation of the system.
3 Improvements in the system operation of the coke oven ground dust removal station
The coke pushing and coal loading operations cannot be performed at the same time, and the principle of pushing coke first and then loading coal is strictly followed.
Push focus and remove dust. The fan usually runs in low speed standby ( ). When the coke pusher starts to push coke, the coke push rod leaves the rear limit and sends a high-speed signal ( ) to the frequency converter. The fan starts at high speed and simultaneously sends a signal to the low-voltage control cabinet to switch the coal loading butterfly valve. When the coke push rod returns, it reduces to low speed < br/> Coal loading and dust removal. When the hydraulic push rod of the dust collection cover of the coal car starts, it sends a signal to the frequency converter, and the fan starts at high speed. At the same time, it sends a signal to the low-voltage control cabinet to close the coke discharge butterfly valve. When the suction power of the coal loading truck reaches... The ash discharge of the gravity dust collector will be determined according to the ash discharge situation, and is tentatively scheduled to be once a week. After the fan stops, do not stop the ash unloading system immediately, and let the ash unloading system continue to work 3, so that the dust accumulated in the bag can be fully back-flushed It is clean and all the remaining ash in the ash hopper has been unloaded.
Effects of using the coke oven ground dust removal station system
Using the ground dust removal station system to remove dust has reduced the dust concentration in the coke oven production area and purified workers' production operations. Environment, coke oven dust control has reached the coking industry and national environmental protection emission standards.
After the system has been improved through process improvements, the stability and safety of the system have been improved, and no accidents have occurred.
Due to simple and effective operation control, The service life of the system equipment is extended, especially the use time of the cloth bags. The system has not replaced the cloth bags for months, achieving the goal of economic operation.
The successful application of the frequency conversion technology of the system not only saves electricity cost, and ensures the stability of the dry pipe suction of the system, which plays a key role in the safe and stable operation of the entire dust removal system.
The three major technologies currently used by our company
. The dry pipe belt trolley is used to block the coke. The furnace top adopts tube gas recovery technology.
. The coke block adopts dry pipe belt trolley, and the furnace top adopts smoke guide technology.
3. Pre-spray bag dust removal is used, and the furnace top adopts double butt smoke guide technology
/> The above three coke oven ground dust removal station technologies have been applied in Handan, Hebei, Xingtai, Hebei, Wu'an, Hebei, Alxa Left Banner, Inner Mongolia, Wuhai, Inner Mongolia, Xiaoyi, Shanxi, Shizuishan, Ningxia, Liupanshui, Guizhou, Qitaihe City, Heilongjiang 30,000 Ton-10,000 tons on coke oven.