Riser

The rising pipe is installed at the top of the coke oven and is used to export the raw gas in the carbonization room as an auxiliary equipment of the coke oven.The rising pipe is composed of a cylinder,a bridge pipe,and a flap seat(also known as a water seal valve body).The rising tube body is a cylinder made of cast iron or welded with steel plates,lined with clay bricks;Some are also made with a jacket or spiral tube structure,where water or a heat carrier is added to the jacket or spiral tube to recover the sensible heat of raw gas.The upper part of the bridge pipe is equipped with a water seal cover to prevent the escape of crude gas from polluting the atmosphere.The turning point of the bridge pipe is equipped with an ammonia nozzle to inject hot ammonia water,which is used to evaporate and cool the crude gas.The bridge pipe is also equipped with steam nozzles or high-pressure ammonia water nozzles.When loading coal into the carbonization chamber,negative pressure is generated by steam or ammonia injection to guide the crude gas into the gas collection pipe,in order to reduce the smoke emitted from the coal loading hole.A flip plate(also known as a water seal valve)is installed on the flip plate seat.When coke is discharged from the carbonization chamber,the flip plate is closed,and the inlet of ammonia water sprayed from the bridge pipe,along with the structure diagram of the rising pipe and gas collection pipe,overflows around the flip plate,forming a water seal to prevent coarse gas from escaping from the gas collection pipe.For the operating conditions of the coke oven top,an insulation cover can also be added outside the rising tube to reduce the thermal radiation of the rising tube.

Operating procedures for riser

1.Wear labor protection equipment before operation.

2.When walking on the furnace,it is strictly prohibited to step on the smoke and dust removal hole cover to prevent it from falling into the carbonization chamber.

3.When opening the smoke and dust removal hole or cleaning the rising pipe,stand on the windward side.

4.It is prohibited to clean the ascending pipe without considering the bridge pipe turnover plate.

5.When cleaning bridge pipes and gas collection pipes,attention should be paid to the wind direction to prevent gas poisoning.

6.It is strictly prohibited to push or open the coke during the discharge of the gas collection pipe.The cover of the mature coke oven number rising pipe should be immediately extinguished when the discharge catches fire.

7.All tools used should be placed in designated locations,and the small chain for cleaning the hole cover should be intact to prevent falling and injuring people.

8.Non personnel in this position are not allowed to use or operate the equipment in this position.

9.Timely check the water volume and drainage situation of the liquid seal to prevent overflow and damage to the furnace body.

10.Prohibit iron tools from falling into the carbonization chamber.