#preheater

[yongji]

High-Temperature Air Preheater

Optimize your industrial heating process with our High-Temperature Air Preheater. Improve efficiency, save energy, and reduce emissions. Lea

Yongji Group, a leading developer and manufacturer of advanced process equipment, is an integrated enterprise specializing in environmental and chemical engineering design, research and development, manufacturing, installation and commissioning of environmental protection and chemical equipment. Located in Yangzhou, a historical and cultural city in Jiangsu Province, China, the company has over 1,000 employees and covers an area of approximately 200,000 square meters. Yongji Group possesses advanced R&D capabilities, production equipment and quality management systems, and is capable of providing customized solutions based on customer needs. It also collaborates with research institutes and design institutes to jointly promote the innovation and development of process equipment technology.

In the national basic chemical industry, the country has proposed to strengthen the manufacturing of renewable green energy in the chemical field, and the manufacturing of sulfuric acid engineering is an important part of the chemical industry. Therefore, Yongji Group is committed to exploring new methods in the acid-making business. With intelligent factory equipment leading the development trend of future industries, Yongji Group has adopted various intelligent equipment and technologies, such as robot automated welding and laser cutting, to achieve efficient automation in the production process. In addition, the collaborative robot section is an important part of Yongji Group's intelligent manufacturing, covering multi-robot collaboration systems, high-level collaboration and intelligent control, to efficiently complete complex production tasks, injecting higher levels of efficiency and quality into the company's production processes. On the road of intelligent manufacturing, Yongji Group has always been dedicated to the research and application of manufacturing technology and has achieved remarkable results. In the future, Yongji Group, with an unchanging original intention, will continue to adhere to the fundamental principle of "creating quality through products and services", promote the development of intelligent manufacturing technology, and assist Chinese manufacturing in going global.

[miaphonefix]

This preheater is accurate, convenient and supports multiple languages

[chnzb]

LADLE PRE-HEATER

Get ready to revolutionize your ladle pre-heating process with CHNZBTECH's Vertical Ladle Pre-Heater Burners System. Achieve optimal tempera

Preheaters are suitable for different types of gas or liquid fuels. Such as blast furnace gas, mixed gas, natural gas, propane, acetylene, etc. According to the combustion medium situation of the user, fuel parameters are provided by the user, and different forms of baking devices are designed to ensure the combustion effect.

APPLICATION

LADLE PREHEATER APPLICATION

Used for on line (off line) baking of steel (iron) ladle and continuous casting tundish, including fast or slow drying of newly built ladle and turnover ladle. Fast baking of online steel ladle or tundish. The baking temperature reaches around 1000 degrees.

CHARACTERISTICS

LADLE PREHEATER PERFORMANCE CHARACTERISTICS

The series of steel (iron) ladle baking machines produced by our factory are divided into two forms: vertical and horizontal. Vertical type is divided into online gantry type and offline flipping type, consisting of three parts: mechanical structure, ignition system, and control system.

[cement-epc-blog]

Key points of rotary kiln maintenance

Product introduction:https://www.cementepc.net/burning/Rotary-kiln.html

Safe operation during daily operation of rotary kiln can greatly reduce the occurrence of equipment fault accidents, extend the service life and safe operation cycle of rotary kiln, slow down the damage of refractory materials, reduce the consumption of power and auxiliary materials.

Safe operation of rotary kiln includes correct execution of operating procedures, regular maintenance and repair.Therefore, high attention should be paid to the operation and maintenance of rotary kiln, and its safety operation matters needing attention are as follows:

1. Strictly abide by the technical operation rules of rotary kiln and strictly control the technological parameters of rotary kiln. 2. Hang the high temperature warning board to remind you not to touch the high temperature parts to prevent scalding. 3. When working around the rotary kiln, you must wear labor protection products (work clothes, hard hat, dust cap, mask, goggles, gloves, labor protection shoes, safety belt, etc.).Short-sleeved shirts and chemical-fiber work clothes are prohibited. Work clothes should be tightly wound to prevent rotating parts of the machine from strangling corners and sleeves and causing accidents. 4. When passing through the observation hole of rotary kiln, wear the fireproof mask and leather gloves. Direct viewing is not allowed.When the observation hole is not used, the observation hole should be closed.Non - workers should leave the kiln head platform to prevent the high temperature smoke ejecting injury.

5. During operation, do not touch the bearing, reducer or the interior of the big gear housing with hands or other things. Wear safety protection equipment when carrying out maintenance inspection or cleaning. 6. Check whether the contact and wear between the roller and the supporting wheel and the retaining wheel are even, whether there is uneven force or pitting phenomenon.Every 4 hours, check the reducer for abnormal sound and noise. 7. Check the outlet gas and discharge temperature frequently, so as to avoid overheating of the cylinder body and avoid the phenomenon of local burning of the cylinder body. 8. The operation of the feeding machine should be delicate and steady to prevent the shaking of large movements. 9. The kiln speed of rotary kiln should be controlled and stable. Stable feed and kiln speed are very important.The initial feed quantity and kiln speed of the new kiln should be controlled at about 35% of the design value.The speed of kiln increases with the increase of feeding amount.When the system is running normally, the kiln speed should be controlled at 3.0r/min.

10. It is strictly prohibited to stop kiln baking to avoid serious collapse accidents caused by "hot bending" caused by temperature difference between upper and lower parts of the cylinder. Before stopping the kiln, stop the hot air supply first, and then stop feeding.Only when the exhaust gas temperature is below 50℃ and the sludge in the rotary kiln is cleaned can the kiln be stopped. If the rotary kiln is suddenly cut off due to other reasons, the rotary kiln must be turned by winch or manually rotating cylinder every 15 minutes for 1/4 turn, and the interval time can be increased appropriately after 3 hours.The hot air supply should be stopped when the kiln is stopped to avoid bending the cylinder body. 11. Repair work shall be carried out after listening to the kiln, and a "do not start" sign shall be hung on the motor switch. 12. Do not tie the cloth to the hand or wipe the appearance of the machine with your fingers near the rotating parts. Be careful not to wrap the material around the rotating parts, especially on the supporting wheels.

The page source:https://www.cementepc.net/Industry/Key-points-of-rotary-kiln-maintenance.html

[cement-epc-blog]

What should be done when the cement plant preheater is blocked?

Product introduction :https://www.cementepc.net/epc/

After the preheater block, if found not timely, it is possible to block from the feeding pipe to the preheater cone, or even block the whole cyclone tube, bring great difficulty to the preheater block.

Some manufacturers have to adopt the blasting method with hidden safety risks to clear the blockage, improper operation of the blockage will cause serious accidents of casualties.Therefore, it is of great significance to formulate and strictly operate in accordance with the pre-heater blocking plan to prevent casualties and restore normal production of the blocked parts as soon as possible.

1. Preparatory work before blocking removal:

Prepare cleaning tools such as 6 pieces of steel pipe (5 m ~ 7 m), rubber tube, protective mirror, asbestos clothes, gloves, wire, pliers, etc.Organize personnel and unified command to ensure safety.

2. Central control operation shall be adjusted as follows:

(1) after confirming that the preheater is blocked, stop the coal feeding in the decomposition furnace and the raw material feeding in the kiln immediately.

(2) inform the waste heat generation operator to make corresponding adjustments.

(3) reduce the high temperature fan draft, pay attention to control the kiln head negative pressure, grate cooler cooling fan inlet valve can be gradually reduced from the low temperature section to the high temperature section, to ensure normal clinker cooling.

(4) open the ignition chimney cap so that the outlet temperature of C1 cylinder does not exceed 400.

(5) appropriately reduce the kiln speed and the amount of coal used in kiln head according to the temperature in the kiln.

(6) stop the main drive of the kiln and use auxiliary motor to intermittently rotate the kiln on the site if the blockage removal cannot be completed within 30 min.If the blockage is serious, stop feeding coal to kiln head and stop kiln treatment.Can clear in a short time, can be treated according to kiln insulation.

(7) control the negative pressure of the one-stage cyclone tube to ensure the safety of the on-site plugging personnel.

(8) it is forbidden to fire air cannon during blocking removal to prevent high-temperature gas or materials from shooting out and burning blocking personnel.

(9) it is strictly forbidden to stand in the pit of kiln head, grate cooler and clinker conveying when blocking is cleared, so as to prevent fresh materials from pouring out and injuring people.The gush of raw material should be promptly cleaned to prevent personnel from being burned.

Jiangsu LVSSN can provide high quality and efficient cement factory, please consult our customer service or leave a message to us, we will reply to you as soon as possible.

The page source: https://www.cementepc.net/company/What-should-be-done-when-the-cement-plan.html

[cement-epc-blog]

Cement factory cyclone preheater collapse material block how to solve - has been solved

Product introduction :https://www.cementepc.net/epc/Cement-Production-Line.html

A cement factory is a RSP pre-decomposing kiln, which belongs to grade 4 preheater and produces 2000t daily clinker.After the kiln was put into use, the preheater appeared the problem of easy collapse material clogging.

Cyclone preheater at all levels of easy to hang the skin, especially three levels and kiln tail shrinkage mouth, serious will form collapse block cyclone tube, resulting in production.After plugging, cement factory USES artificial clear plugging, extend stick into the preheater with manpower, staff feel clear skin or plug.Although effective in a short time, but can not fundamentally solve the problem, and this method has many drawbacks, such as: high labor intensity and dangerous;A lot of cold air will be poured into the preheater, which increases energy consumption.It also affects the stability of system wind pressure, material flow direction and thermal system.When plugging, the refractory lining will be damaged to different degrees, resulting in the phenomenon of "red wall".

1.Possible solutions

After many attempts, the cement factory chose air cannon, and installed 3 sets of C3 preheater no. 1, 3 sets of no. 2 cone respectively, 8 shrinkage inlet (2 on one side) at kiln end, and 2 sets at slope slope of kiln end.The air cannon is composed of compressed air oil filtration device, compressed air container, instant release device, automatic spray blasting cycle control system and nozzle, etc., mainly through the rapid release device to release the stored compressed air in an instant, produce a strong impact force, directional remove the crust and blocking materials.

2. Use effect

After the installation of air gun, now there is no danger of skin formation in the preheater system, and the slope of kiln end is smooth and smooth, no accumulation blockage occurs, basically achieving the purpose of clearing and blocking the flow.Moreover, the installation of air cannon has produced many comprehensive benefits.For example: the phenomenon of preheater blockage is reduced, improve the operation rate of cement kiln, air gun effective automatic material cleaning, to avoid manual blocking caused by a large number of cold air into the system, which reduces energy consumption, and reduce labor intensity;And reduce the possible casualties of manual blocking;As the air gun does not contain damaged refractory lining, the energy consumption of refractory lining is greatly reduced.

For more information about cement production line, please consult our customer service or leave a message. We will reply to you as soon as possible.

The page source: https://www.cementepc.net/productknowledge/Cement-factory-cyclone-preheater-collaps.html

[cement-epc-blog]

Common accidents and treatment measures in cement plant

Product introduction:https://www.cementepc.net/epc/

Major equipment accidents and process accidents may occur at any time in the production process of cement factory. Every factory should set up emergency plan as soon as possible to prevent further expansion of the accident.In case of accident, it is necessary to deal with the problem correctly and effectively, so as to minimize the loss and injury of the factory and employees.

1. Raw material feeding scale is out of order

(1) increase the rotation speed of the high-temperature fan to prevent the preheater from collapsing and blocking due to the sudden increase or decrease of the material quantity.

(2) reduce kiln speed to prevent running raw materials.

(3) increase the amount of coal fed to the kiln head, increase the temperature of the firing zone, leave the fire to wait for the material, and ensure the quality of the clinker is not affected.

(4) when the electrical personnel go to the equipment warehouse to look for solenoid valve spare parts, and the valve opening of pneumatic valve reaches 100%, the pneumatic valve inlet pipe shall be pulled out quickly to reduce the fluctuation of raw material feeding quantity into the kiln.

(5) replace the solenoid valve, connect the air inlet pipe of the pneumatic valve, and resume normal production.

2. The preheater is blocked

Most of the time of preheater blockage occurs shortly after feeding, when the kiln operation is abnormal, the thermal system is unstable, the system accidents are many, which leads to the frequent opening and stopping of the kiln, skilling and falling, serious air leakage, and mechanical failure.

After the preheater block, if found not timely, it is possible to block from the feeding pipe to the preheater cone, or even block the whole cyclone tube, bring great difficulty to the preheater block.Some manufacturers have to adopt the blasting method with hidden safety risks to clear the blockage, improper operation of the blockage will cause serious accidents of casualties.Therefore, it is of great significance to formulate and strictly operate in accordance with the pre-heater blocking plan to prevent casualties and restore normal production of the blocked parts as soon as possible.

Preparation before plugging removal: prepare plugging removal tools, such as 6 pieces of steel pipe (5m~7m), rubber pipe, protective mirror, asbestos clothes, gloves, wire, pliers, etc.Organize personnel and unified command to ensure safety.

The central control operation shall be adjusted as follows:

(1) after confirming that the preheater is blocked, stop the coal feeding in the decomposition furnace and the raw material feeding in the kiln immediately.

(2) inform the waste heat generation operator to make corresponding adjustments.

(3) reduce the high temperature fan draft, pay attention to control the kiln head negative pressure, grate cooler cooling fan inlet valve can be gradually reduced from the low temperature section to the high temperature section, to ensure normal clinker cooling.

(4) open the ignition chimney cap so that the outlet temperature of C1 Jane does not exceed 400C.

(5) appropriately reduce the kiln speed and the amount of coal used in kiln head according to the temperature in the kiln.

(6) stop the main drive of the kiln and use auxiliary motor to intermittently rotate the kiln on the site if the blockage removal cannot be completed within 30min;If the blockage is serious, stop the kiln head to feed coal, stop the kiln treatment, can be cleaned in a short time, can be treated as kiln insulation.

(7) control the negative pressure of the one-stage cyclone tube to ensure the safety of the on-site plugging personnel.

(8) it is forbidden to fire air cannon during blocking removal to prevent high-temperature gas or materials from shooting out and burning blocking personnel.

(9) it is strictly forbidden to stand in the pit of kiln head, grate cooler and clinker conveying when blocking is cleared, so as to prevent fresh materials from pouring out and injuring people.The gush of raw material should be promptly cleaned to prevent personnel from being burned.

3. High temperature fan air inlet collapse material

(1) in order to prevent the preheater from clogging due to material collapse, the amount of raw material feeding into the kiln shall be appropriately reduced as the case may be;

(2) in order to prevent the high-temperature fan from tripping and stopping due to the current exceeding the limit for a long time, properly close the inlet valve, and return to normal after the collapse;

(3) the inspection personnel of kiln head should stay away from the kiln mouth and grate cooler to prevent burns;

(4) as the amount of hot air into the mill decreases, the raw material vertical mill should reduce the amount of feeding, appropriately reduce the speed of the separator, avoid excessive vibration and stop.After the high temperature fan collapse ends, restore the speed of the separator in time to prevent the coarse fineness of raw material from grinding from affecting the calcining of the kiln.

4.High temperature fan trip

In normal production, high temperature air may be shut down because of electrical failure, fan oil supply system failure or kiln tail exhaust fan trip.After the high-temperature fan tripping, the kiln tail preheater system will soon show positive pressure, and then the kiln head will return to fire with positive pressure, and the gas temperature into the electric dust collector of the kiln head will rise sharply, seriously endangering the personal safety and equipment safety of field inspection personnel.At this time, if the effective measures are not taken, the preheater will be blocked, the electric dust collector of the kiln head will be burned, and the accident of the burn inspector will be caused.

In case of high temperature fan trip accident, the central control operation shall promptly take the following measures according to the accident treatment plan:

(1) through the intercom, inform the site inspection personnel to take an emergency risk, and leave the preheater, the ramming hole and manhole door of the smoke room as soon as possible, and no one is allowed to stand in front of the kiln head and grate cooler to ensure personal safety;

(2) stop feeding coal in the decomposing furnace and raw material into the kiln to prevent clogging of the preheater;

(3) open the ignition bacon cap, close the fan inlet valve in the low temperature section of the grate cooler, increase the opening of the inlet valve of the kiln head exhaust fan, and ensure the abnormal pressure of the kiln head.

(4) inform the waste heat generation operator to make corresponding adjustments;

(5) reduce kiln speed appropriately to prevent running raw materials;

(6) reduce the amount of coal used in kiln head and stop coal when necessary;

(7) according to the inlet temperature of electric dust collector of kiln head, open the cold air valve in the inlet pipe appropriately to protect the dust collector from being burned;

(8) find out the cause of tripping and contact relevant personnel to deal with it. Close the high temperature fan inlet valve and get ready for starting.

Jiangsu LVSSN can provide high quality and efficient cement plant construction, please consult our customer service or leave a message to us, we will reply to you as soon as possible.

The page source:https://www.cementepc.net/productknowledge/treatment-measures-in-cement-plant.html

[cement-epc-blog]

Repair and maintenance of cement works

Product introduction:https://www.cementepc.net/epc/

In order to ensure the smooth production of the factory and the safety and health of the workers on site during the construction, the factory must overhaul the equipment on time.

1. General safety requirements

(1) all units of cement plant shall incorporate safety measures into the important content of overall overhaul and construction work to be considered and implemented as a whole.

(2) before the implementation of maintenance, the maintenance equipment must implement the power failure procedures and procedures, all relevant units must implement.Complete safety equipment is required.

(3) the important overhaul focus on hot fire, climbing, lifting, cross operation, preheater, kiln mill and other dangerous operations safety.

(4) when entering the maintenance site, all operators must wear labor protection articles according to regulations, and it is forbidden to work after drinking.

(5) sufficient lighting conditions must be ensured at the work site.

(6) all maintenance teams must hold pre-maintenance safety meetings, make safety disclosure and technical disclosure and make records.

(7) after work, the site should be cleaned in time. When replacing parts and components, they should be classified and put on shelves in time, so as to make the site clean as possible.

(8) all the maintenance personnel of the unit and the outsourced maintenance personnel must go through safety training before they can carry out maintenance operations, and the outsourced personnel must sign a safety agreement at the production office.

2. Maintenance safety of key projects

2.1 vertical mill maintenance:

(1) the power failure and confined space of main motor, powder separator and upper belt and other related safety procedures must be handled when entering the mill;

(2) confirm that the exhaust gas air valve is closed in place, and the residual exhaust gas in the mill is ventilated and removed before entering, and the safety belt must be worn when grinding;

(3) more than 2 persons shall conduct the operation, and special persons shall be arranged to take charge of the operation.

2.2 rotary kiln maintenance:

(1) the operation must ensure adequate lighting conditions;

(2) the plate flip valve of the feeding pipe in the kiln tail must be locked (to prevent accidental feeding);

(3) go through the power failure formalities, hang the "no closing" sign, and transfer it to "0";

(4) confirm that the grate cooler, kiln head and kiln tail can only be used when there is no one in the kiln;

(5) after the kiln is cooled, ensure that the harmful gas in the kiln is discharged and the kiln is well ventilated. Ensure that the kiln skin and firebrick are free from collapse and that the air gun gate valve is closed and exhaust is completed before entering the kiln;

(6) safety helmet must be worn when entering the kiln, and safety belt must be worn when working at height;

(7) if there is any cross operation on site, both parties must communicate and confirm the safety before carrying out the operation.

2.3 preheater overhaul:

(1) confirm that the relevant fan is in the specified state.Air cannon off;

(2) upper feeding pipe flap valve locking (to prevent accidental feeding);

(3) apply for safety work tickets such as confined space and high-altitude work;

(4) when hoisting materials, they must be supervised by someone, and the dangerous area is circled with warning tape. All personnel are forbidden to enter the warning area or work or walk under it;

(5) three persons or more shall be responsible for the operation. On-site specially-assigned persons shall be responsible for the monitoring and communication outside the home.

(6) the skin that may collapse must be cleaned up in advance before entering and the temperature is suitable for entering;

(7) shelves are raised inside the cyclone tube. Those who enter must wear safety helmets and fasten safety belts;

(8) the interior must be adequately lit and powered by safe power.

2.4 electric dust collection maintenance of kiln head and kiln tail:

(1) handle safety operation tickets for confined space, high-altitude operation, power failure and other related work, and hang the "no closing" operation sign;

(2) confirm discharge is completed before entering, and enter only after there is no internal current;

(3) more than 3 people are allowed to work. No single person is allowed to work.

(4) low-voltage 36V safety lighting is used for internal work.

3. Safe debugging after maintenance

(1) according to the provisions of the transmission procedures, starting procedures.

(2) cement plant equipment debugging to have a unified command, central control, machine, electrical workshop personnel should cooperate in place.

(3) all equipment must be repeatedly confirmed before debugging.The confirmation includes: whether the hole door, bolt and all attached equipment should be in conformity with the specified state, whether the materials, tools and other sundries left behind by maintenance have been cleaned, and whether the personnel have been completely evacuated.

If you have any more questions about cement plants, please contact us. We will reply to you as soon as possible.

The page source:https://www.cementepc.net/productknowledge/Repair-and-maintenance-of-cement-works.html