I’d like to hear suggestions for improving the four main types of equipment used in coke ovens

Rammer modification: Install a dust removal system on the rammer.

All four vehicles are equipped with dust removal systems, eliminating the need for a ground station.

As a mechanism for pushing and pulling carts to clear the doorways and frames, manufacturers should make significant efforts in research and development to achieve satisfactory results.

A mature solution should be developed as soon as possible for coal loading and dust removal using side-loading cars in rammed coke ovens.

The dust removal systems of the four major car manufacturers are relatively perfect; the mechanisms for cleaning the doors and frames are indeed interesting, but few implementations are of high quality. Keep working hard!

Heating devices are installed in the hoppers of coal loading vehicles used in the north to prevent coal from freezing on the walls of the hoppers, which could interfere with coal loading

The suggestions you have made are very good. 1. Dust removal is a major problem. At present, it is most reasonable to use ground-based stations for dust removal from the coal charged from the top of the furnace and for dust removal during coke pushing from the side of the furnace. Some manufacturers, in an effort to save on costs, install dust removal equipment on the vehicles themselves; overall, however, the results are not very satisfactory. The idea of installing a dust removal device on side-loading coal cars is excellent. Currently, dust removal equipment is already available on the 7.63 coke pushers, but space is required to install it. For side-loading coal cars with a length of less than 4.3 meters, the deck area is too small to accommodate such equipment; however, it is feasible for those cars with a length of over 5.5 meters. 2. Regarding the door and frame cleaning mechanisms, the most advanced approach at present is to use spiral milling cutters along with high-pressure ammonia for cleaning the doors. However, in terms of cost, many manufacturers are reluctant to incur such expenses. Moreover, from a practical standpoint, as long as maintenance is carried out properly and cleaning is done at the end of each shift, satisfactory cleaning results can be achieved. At present, the best method for cleaning the frame is scraping, but there are still many detailed aspects regarding which more suggestions from everyone would be appreciated. My suggestion: Manufacturers of dust removal equipment should develop efficient systems that require less space; there is likely to be a large market for such systems in the coking industry. Everyone is welcome to continue submitting reasonable suggestions; it would be best if they are more specific, including proposed methods for improvement. Thank you! This post was last edited by ldy6230016 on 2009-4-21 10:56.]

Can a remedy for coal cake collapse during the coal charging process in large ramming coke ovens be achieved through the modification of the overhead cranes?

Reply: 1. It is feasible to install heating devices in coal hoppers; the coal trough walls of ramming coke ovens already have such heating devices, which can be either steam-based or electric, allowing users to choose according to their specific needs. 2. With the technology currently available, four-axle interlocking systems should be feasible to use; however, the cost is too high, which forces many manufacturers to give up on this option. At present, most manufacturers with the necessary capabilities have adopted four-axle interlocking systems for 7-meter, 7.63-meter, and 5.5-meter coke ovens. The 3.55-meter rammer, along with the subsequent 6-meter and 6.25-meter rammers, are used to address the issue of coal cake collapse. Devices for cutting coal cakes are currently under development; once the technology is mature, they will be gradually installed on large-scale ramming coke production equipment. I hope everyone will continue to offer good suggestions!

Currently, in the event of a sudden power outage, most coke pushers use manual operation or diesel engines to retract the coke pushing rods and coal pushing rods from the carbonization chamber. The manual rotation speed is too slow, and it also has a negative impact when rotating it back. Diesel engines are prone to failure in harsh operating conditions; in northern regions, they have difficulty starting in winter, which affects their usability. A small generator is installed as a power source; this power source is connected to a small hydraulic pump, which in turn is connected to the pusher and coal oil motors that provide the force needed to pull out the large rods and coal rods. It’s troublesome to install, but it’s useful and reliable. A crane can be used as a reference; choose an oil motor that matches the weight of the coke pushing rod. The above are purely my personal opinions.

I used to work on the design of the four main types of coke ovens; I’m now self-employed. I have a thorough understanding of all the entities involved in the manufacturing of major vehicle equipment.

Regarding the door cleaning and frame cleaning mechanisms, the most advanced approach at present seems to be using a spiral milling cutter along with high-pressure ammonia water – or high-pressure water – for cleaning the doors

I am also very interested in the four major types of machinery; I have been paying attention to coke oven equipment for many years. I think it is not easy for an individual to improve these four major types of machinery.

Reply: Qingmen uses a spiral milling cutter along with high-pressure water. Thank you for the correction. Simply put, coke oven equipment consists of four major types of vehicles. That’s not the case; now, with the addition of vehicles for tamping coke ovens, there are even more of them. As mentioned above, to design solutions that enhance the level of mechanization and the functionality of various vehicles is not something that one or two people can accomplish. It requires collective effort and good suggestions from everyone. After all, the experts in this forum are all elites from various manufacturing companies, who have worked on the front lines for many years and use vehicles produced by different manufacturers; therefore, they possess valuable first-hand experience. It's definitely the most direct way to hear your suggestions and guidance here. I hope you will continue to pay attention.

Dust removal modification when the coke pusher and coke stopper retrieve the doors； In addition, the modification for dust removal at the small furnace door during coal loading ；

Most dust removal vehicles in use today need to be improved. Our company’s previous 5.5-meter coke ovens used spray-based dust removal systems; during coal loading, these vehicles produced a lot of black smoke after removing dust, which was an ineffective solution to the problem. This issue persisted for a long time without any proper resolution. We hope that equipment manufacturers will make further improvements to the design of such vehicles, applying more innovative approaches. For example, the dual-U-tube dust removal system used abroad yields better results, but it requires higher technical standards – it involves connecting the dust removal ports of one chamber with those of another chamber in order to control the emission of dust. This system allows all the dust generated during coal loading to be contained and sent to another chamber from where it can be drawn into the exhaust ducts. However, how to make this system automated and ensure optimal performance is something that deserves further research

First, the positioning technology for the four major types of vehicles enables automatic furnace number identification； Secondly, the data exchange technology, that is, the communication technology, between the four main vehicles and among them as well as between each of these vehicles and the control room, enables the interlocking of basic operations such as coke pushing and coal loading, thereby allowing the vehicles to move automatically under monitored, driverless operation. Taking the coke pusher as an example, it consists of four fully automatic units: automatic alignment, automatic door removal, automatic coke pushing, and automatic coal leveling. A brief description of the process is as follows: the system automatically determines that when the operating conditions are met, the coke pusher proceeds with coke pushing at the designated position (based on the current coke pushing plan) – then removes the furnace door – pushes the coke (after which the coke pushing plan is updated) – closes the door – adjusts to the position for coal leveling – removes the smaller furnace door – levels the coal (after which the coal leveling plan is updated) – closes the smaller furnace door – and returns to the coke pushing position (with the updated coke pushing plan). This shows that the entire process of coke pushing, stopping coke movement, receiving coke, and loading coal is carried out automatically by the vehicle; human intervention is only required for monitoring, without any need to operate any control buttons.

The control console in the operation room should be designed more perfectly; like in our vehicles, adding video and Qianjiang weighing equipment to the operation room makes it look a bit messy. It is best to reserve the positions for the camera display and the weight display during the design phase!

Reply: 1. I have already mentioned the dust removal issue on the 17th floor earlier. 2. The U-tube technology mentioned on floor 18 is now being used by many manufacturers, with very good results. I’m just not sure if it will have any adverse effects on subsequent chemical processing? 3. The issue of automatic operation for the four types of vehicles mentioned on floor 19. I don’t think it’s suitable for the domestic market at the moment; for various reasons, the domestic market has not yet reached such a level. High standards must be applied both to people and to the mechanical and electrical components. But I think it can be achieved in the future. 4. The question raised on the 20th floor is feasible, but I’m not sure whether these screen requirements you mentioned should be placed on the console or on the wall? 5. If there are any other friends who are interested in the four major cars, just like the person on the 15th floor, you can send me a message and we can discuss it.