How to solve and preventive measures for faults in coking accessories

（1）How to solve the malfunction of coking equipment accessories

Half of the air pollution on the top of coking equipment accessories is caused by the escape of raw gas from the rising pipe cover and valve body socket.The rising pipe of the coke oven coking equipment accessory is a device that first passes through the gas escaping from the coke oven.The cover of the rising pipe is opened before pushing the coke,and the back cover of the coal loading is closed.When the gap between the valve body and the socket of the bridge pipe is large,asbestos rope is used to block it.This is what needs to be done.The protective iron parts are also one of the main equipment of the coke oven,which is mainly responsible for protecting the bricks of the coke oven body.The main function that changes with the temperature of the coke oven is to.

Pay attention to the changes in temperature of the coke oven and ensure normal production of the coke oven.Coking equipment accessories include furnace pillars,protective plates,furnace door frames,and furnace doors.The installation of furnace protection iron parts can directly affect the normal production and service life of the coke oven.Installation is also a prerequisite work.Summary:Qualified equipment is the prerequisite,and the key is to prepare in the early stage.Protecting the furnace door frame and pressurizing is the difficulty,and the difficulty is transportation and installation.Measures should be taken to protect the equipment during transportation,as some poor quality furnace doors can deform and affect sealing.So during installation,attention should be paid to the sealing between the furnace protection iron parts and the coke oven.Doing a good job in managing coking equipment accessories is responsible for both engineering and production.No matter which type of equipment is not installed carefully according to regulations,it will have an impact on future work.If the installation is completed but not properly managed,it is not possible.It has been proven that some industrial accidents are often caused by inadequate installation and management,resulting in hidden dangers.

Each operation team strictly operates in accordance with equipment management requirements and resolutely violates regulations,resulting in a steady increase in the operating rate of coking equipment accessories.The equipment maintenance department shall follow the team for maintenance,promptly handle and report any problems found,and ensure that major defects are not left overnight and minor defects are not left on duty.The main equipment is in good condition and the auxiliary equipment is in good condition.The company's maintenance personnel strictly control the maintenance process during maintenance work,clarify the acceptance quality standards,and ensure that production does not occur until the standards are met.At the same time,the equipment manager often goes deep into the site to understand the condition of the equipment,check the maintenance,upkeep,and repair quality of coking equipment accessories,and ensure the normal operation of the equipment.The company has also increased the punishment for operators who violate regulations,and strict punishment measures have prompted the person in charge of coking equipment accessories and operators to continuously strengthen the management of equipment integrity and strive to improve equipment operation rate.

（2）Preventive measures for coking equipment

1.Strictly monitor the salt content of raw materials

In order to reduce the content of impurities in coking raw materials,the unit actively coordinates relevant departments to carry out technical research on the atmospheric and vacuum electric desalination unit according to production needs,enhances the"one removal and three injection"treatment effect of crude oil,and ensures that the sulfur and salt content in vacuum residue is within the control range of process indicators.

2 Equipment Material Selection

The selection of coking equipment materials for processing sour crude oil should be considered based on severe sulfur corrosion,and in special cases,the acid value of the raw materials should also be considered.

For delayed coking equipment,correct material selection is a fundamental anti-corrosion measure.Replace carbon steel that is not resistant to sulfur corrosion with stainless steel or high alloy steel to improve the corrosion resistance of the material.However,considering the selection of materials and other anti-corrosion methods comprehensively can make the equipment material selection economically reasonable.

3 Monitoring corrosion

The corrosion problems encountered by delayed coking coke oven equipment during the processing of sour crude oil containing sulfur are very complex.After taking necessary anti-corrosion measures,certain measures are also taken to monitor,inspect,and analyze the corrosion situation of the equipment online,in order to grasp the degree and development trend of equipment corrosion,and formulate corresponding preventive measures or take necessary protective measures to achieve the goal of controlling and avoiding accidents.During the maintenance period,a total of 12 online anti-corrosion monitoring points were added to the device to monitor the corrosion status online.

4 Use

Use is also a way to slow down and control corrosion.The advantage is that the addition amount is small,the investment is low,and the entire system can be protected.Water soluble or oil soluble hydrogen sulfide resistant materials are generally added to coking systems.Coking plants have been used in China and have achieved good results.

5 Other anti-corrosion measures

Adjust the process,optimize operations,strictly operate the process,prohibit equipment overheating and overpressure,and minimize fluctuations as much as possible.

Due to the tendency to generate turbulence,eddy currents,and high corrosion rates at bends,reducers,tees,and equipment inlet and outlet nozzles,the equipment structure and pipeline layout should be reasonable to avoid thermal stress,liquid stagnation,or local overheating,reduce eddy currents and blind spots,reduce sudden changes in flow direction,and form low-pressure areas to prevent erosion.

When processing high sulfur crude oil in delayed coking units,multiple methods such as material selection and process selection should be combined for anti-corrosion control.It is particularly important to strengthen anti-corrosion management and implement various anti-corrosion rules and regulations,in order to ensure that all anti-corrosion measures are implemented in place.