The SIDEMIR (Sivas Iron Steel Enterprices Inc.) has begun the production in 1991. It is a modern and integrated factory with rolling wheel and steel plants.The SIDEMIR Rollingwheel Directorate has said O.K. for our project for the natural gas change of the walking re-heat furnace with 96 ton/hr manufactured by Kurosaki-Japan. In this project, the existing burners have been renewed by our company to burn gas and fuel oil. The safety system is suitable to EN 746-2 standards. The system has been controlled by the Honeywell HC 900 PLC and SCADA software. Aims are to have optimum combustion efficiency, temperature uniformity, quality and capacity increases by applying flow control technics.

The Assan Aluminium, that is one of the biggest foundations of our country in the area of metal industry, has been founded in 1987 in Tuzla area. It supplies more than half of ofr country s need in roll and sheet manufacturing and exports its products to more than 40 countries.

Our project, that we prepared together with Hauck Co. for the natural gas change of the existing folio and sheet heat threatment furnaces, has been accepted by The Assan Work Developing Group. In the project, 42 pcs. Hauck RTG102 radiant tube burners and 42 pcs. Hauck RAD500 recuperators have been used. The system has been controlled by Allen Bradley SLC 5/05 PLC, operator pannel and SCADA software. In the system, for the first time, a different fuel air ratio control system has been used. This system has been tested and worked by our company s stuff in Hauck s lab.s in USA together with Hauck RTG burner and RAD500 recuperator. By heating the combustion air as much as possible, the optimum combustion efficiency has been optained and aimed to get a fuel saving between 17-21%

The Ekinciler Project of the Modernisation and The Change to Natural Gas of 100 ton/hr Rolling Furnace 

The Ekinciler Iron-Steel Co. has been established in 1983 in Iskenderun.It is a very huge and integrated establisment that has all the last technological possibilities together with steel athely, rolling athely, oxygen factory and its auxillary factories. It has ISO 9002, TSE and the related manufacturing certificates of Germany, France, England, etc. 

The Ekinciler administrative board has said O.K. for the project prepared by Yeten and the Hauck Man. Co-USA that is represanted in Turkiye by us. First of all, the analysis of the kiln has been done and the temperature curve followed by the rolling steel has been prepared. According to this, the energy requirements of zones have been calculated. 

In this project, Hauck BBG Buffle Burners working with low air pressure in large firing range(9:1) have been used.

In the system, the max. safety conditions has been applied acc. to Botas specifications. A seperate pressure drop station for each zone has been build so that zones do not effect to eachother, to get sensitive control and so that the furnace will not shut off because of a failure in the zone.A position switch has been put on each selenoid for correcting off positions during sweeping. 

By appliying flow control technology, sensitive temp. and fuel-air ratio control have been obtained. Seperate flowmeters and actuators have been mounted to air and gas lines.Air flows have been compansated by combustion air temperature.The actuators- acc. to temperature demand-have been controlled by cross limiting software. So, unless airflow increases, gas flow does not increase and unless gasflow decreases, airflow does not decrease.

Moreover, orificemeters and limit valves have been mounted at the inlet of each burner to prevent the different flame lenghts because of the pipe geomethries and to measure locally gas flows.

In this project, the existing control pannel and Scada software have been cancelled, and Honeywell HC900 PLC and Scada software have been used. The Operator pannel and mimic diagram with LED s have been mounted on the control pannel to prevent the shut off of the system because of any software or hardware  failure of the PC.The excess air for each zone -acc.to the measured values-has been increased from the exit zone to the flue.Using this method, unburned gases has been fired by meeting oxygen before discarding out of the chimney. 

At the end of the project, the measured values are seen very satisfied. The results are as belows:

-The capacity has been increased  10 % after changing to natural gas.

-To decrease tufal on the product by adjusting the kiln atmosphere as oxyditive, neutral and reductive and to burn the unburned gases before discarding them out of the chimney.

-To make the same quality production although different capacities and different environmental conditions.

-To supply an easier managing by watching and saving the process information by SCADA software

-To supply temperature uniformity and get same quality production.

CEMAS was established in 1976 in Kirsehir to supply grinding elements of cement sector.It is manufacturing die parts with pick and sphero alloys for ball(veya marble), silbeps, automotive and machinery sectors. It has ISO 9002 certificate. 

The project and the offer prepared by our company for 2 heat threatment kilns for changing to natural gas have been found suitable by CEMAS. 

First of all, the energy requirements of combustion zones have been calculated acc. to the existing knowledge and the measured values. The fuel-air piping has been projected suitable to energy requirement  and BOTAS  specs. 

For first time in this project, Hauck SVG-HR series high velocity burners have been used. It was passed to convective type heat transfer from radiation type by SVG-HR high velocity burners. Temperature uniformity has been supplied since high velocity burners are circulating furnace atmosphere.

A new control pannel has been manufactured for this project.The furnaces have been controlled by Honeywell HC900 PLC and operator pannel. To understand the system easily,the operator pannel and mimic diagram with LED. The temperature information can be seen on the operator pannel in desired periods and saved to the floppy disk.

By using flow control technology, the sensitive temperature and fuel-air ratio control have been obtained.The seperate flowmeters and actuators have been mounted on the air and gas lines. Airflows have been compansated by combustion air temp.The actuator has been controlled by cross limiting software acc. to heat demand. So, unless airflow increases, gas flow does not increase and unless gasflow decreases, airflow does not decrease.The excess air for each zone -acc.to the measured values-has been increased from the exit zone to the flue.Using this method, unburned gases has been fired by meeting oxygen before discarding out of the chimney.

At the end of the project, the measured values are seen very satisfied. The results are as belows:

-To increase the kiln capacity as 25% by using high velocity burners and passing from radiation type of heat transfer to convection type-effective heat transfer.

-To produce all the balls as same quality and hardness by supplying temperature uniformity.

-To decrease tufal on the product by adjusting the kiln atmosphere as oxyditive, neutral and reductive and to burn the unburned gases before discarding them out of the chimney..

-To make the same quality production although different capacities and different environmental conditions.

-To supply an easier managing by watching the process information and saving them as historically.

The Yeten Combustion and Energy Technologies has been awarded with the Certificate of Success by Hauck Manufacturing Co. in their Yearly Sales Meeting between 10-13 September 2005 in Grantville-USA . During this meeting, it has been done a presentation to guests about the projects of 2005 that has been applied by Yeten. At the beginning of this presentation, it has been given some information to guests about the location and the importance of our country.

Mr. Etchmaier-The Hauck's CEO and Mr.Michael Shay-Sales Manager have presented this award to Mr. Ibrahim Turan-Yeten Company Director. Yeten is being represented  Hauck , that is one of the leader companies in burner manufacturing in the world for 120 years, in Turkiye since 2002.

The Gemciler has been founded in Kahramanmaras in 1948. It produces cupper sheet, roll tape. The Gemciler that is one of the leaders of the sector has TS 554 cercificate.

Our company has designed and commisioned the combustion system of the re-heat furnace with 20 ton/hr push capacity. At the preheating zone of the kiln, Hauck SVG medium velocity burners have been used. In heating and hot holding zones. Hauck WHC flat flame -for the first time- ceiling burners have been used.

The flow control technic has been used for sensitive temp. adjusment and correct fuel air ratio control. The system has been controlled by Honeywell HC900 PLC. The flue temp. has been increased up to 280 deg Celcius by mounting a recuperator on the chimney. By heating the combustion air, 17% increase in fuel saving relative to existing systems, temperature uniformatiy, the decrease in tufal on the cupper as a result of combustion have been gained.

The GIZEM FIRIT has been established  in 1979 in Adapazari. It produces firit for the white utensil manufacturers and enamelled plating manufacturers inland and abroad. The firit production has been made by melting the mixture of bor and some chemicals in high temperature kilns.

First of all, the project has began with the modernisation of the existing system. The Hauck 2106 beta gas burner instead of the existing burners, Honeywell UMC 800 Controller to command and control the system and Fischer differential pressure transmitters together with orificemeters for fuel air measurement have been used. For gas  flow measurement, moduline linear adjustment valve  and  for air flow measurement, ARIS butterfly valves have been used.

 The cross limiting technic has been applied together with flow control  by a developed software. As a result of this, the gas flow does not increase unless air flow increase and the air flow does not decrease, unless the gas flow decrease. Beside this, the combustion air temperature has been increased  up to 200 deg C. According to this temperature, the air flow has been compensated. After this modernisation,  20 % fuel saving, decrease in melting loss because of low combustion air pressure, sensitive temperature and fuel air ratio have been obtained. Because of the decrease in man inisiative, a stable  production quality can be supplied. The modernisations of first four  kilns have been completed and the modernisations of the rest kilns goes on nowadays.

Eren Endustri A.S. has been founded in Kayseri Free Zone. It is a branch of  Has Celik which is one of the most important aliminium manufacturers in our country. It aims to export the biggest part of its production. Yeten has finished the projects of  the total combustion systems of the aliminium melting furnace with 10 MW capacity and the aliminium hot holding furnace with 3.5 MW capacity and the commissionings .  All the safety tests have been done.

Two pcs. Hauck RRG 2112 in aliminium melting furnace, 2 pcs.  Hauck RRG 2106 Beta burners per each holding furnaces have been used. Also, Honeywell 2500 controller for temperature and inner pressure control, Siemens S7-200 PLC and the operator pannel for sequencing and alarm system have been used. 

The combustion air has been heated by a recuperator in aliminium melting furnace. The fuel air ratio has been controlled by a Hauck RRG pilot regulator fitted on the orificemeter on the cold line. This regulator triggers pneumatically the equal pressure regulators at the inlet of burners.

In hot holdings, this ratio has been supplied  by impulse lines coming from the exit of air control servos at the inlet of each burners which trigger equal pressure regulators.

Turkkablo has been established in Izmit-Derince in 1963. It is the first company in Turkiye which produced steel based and whool aliminium conducturs and has TSE ISO 9001, BVQI ISO 9001 and ISO 14001 certificates.

The natural gas change works which is started in 2003 has been completed with changing the heat threatment and the billet annealing furnaces to natural gas in 2005. Six pcs. Hauck BOA series torchs with automatic ignition-open channel burner- has been used in open channels. The gas way armatuors and control pannels has been renewed in billet, heat threatment and annealing furnaces. In billet annealing furnace, Honeywell UMC 800 controller  has been used. Beside very accurate temperature control, the process information can be saved in the device memory and followed in the display as curves.