Investments in 2018

  1. MODERNIZATION AND AUTOMATION OF HOT WATER BOILERS VKSM 20/1 AND VKSM 20/2 IN DHP ZAPAD

The realization of this investment is part of the long-term commitment of the company for the implementation of a system for centralized data collection and operation management (SCADA) of the subsystems in DHP Istok and DHP Zapad. The hot water boilers are plants in which heat energy is produced and with the automation of the boilers VKSM 20/1 and VKSM 20/2 in the heating plant Zapad, the implementation of the project for fully automatic control and supervision of the production plants in the heating plants has been continued. The implementation of the project includes installation of control and executive equipment that enabled autonomous and automatic operation of the hot water boilers, while increasing the reliability, safety in operation and efficiency of the boiler. With this investment, the entire metering and regulation equipment and electrical cables have been replaced, which were installed in accordance with the standards for this type of installations. The modernization and automation of the boilers VKSM 20/1 and VKSM 20/2 provided:

  • minimal impact of the human factor in the management of the plants and thus increasing the safety and security of the process,
  • improving maintenance in terms of fast and efficient detection of defects and
  • improving the efficiency of the boilers due to operation in optimal operating modes.

The equipment for the realization of this investment has been procured by the renowned companies: Emerson, Endres and Hauser, Faber, Gestra and other renowned companies, and the commissioning has been done by the authorized servicers of Sake.

 

 

  1. PROVIDING CONDITIONS FOR MODERNIZATION AND AUTOMATION OF BOILERS VKSM 50/3 AND VKSM 50/4

The past equipment of the boilers VKSM 50/3 and VKSM 50/4 did not provided realization of the envisaged modernization and automation of the boilers according to the preliminary project design. A prerequisite for this was the need to dislocate the existing combustion management equipment (BMS) from the command room to the burners. This is the first phase of the investment that will achieve full automation of the boilers and control and supervision through the existing SCADA system. For that purpose, new electrical cabinets with special design of the location next to the burners have been procured and new cables have been installed to connect the burner equipment with the appropriate control units. New cable cabinets and new cables have been installed in accordance with the standards for this type of equipment. As part of the investment, valves have been installed for automatic blow down of the boilers, which is also a prerequisite for full automation of the boilers, and significantly improves the current way of operation of the boilers. Also, a reconstruction has been made of the room in which the previously procured equipment for control and supervision of the technological process is placed in accordance with the standards prescribed for this type of equipment. The newly integrated equipment provides:

  • increasing the reliability and safety of the boilers,
  • preparation for complete automation of the boilers and
  • Improving the working conditions of the staff.

With realization of this investment, a partial modernization of the boilers VKSM 50/3 and VKSM 50/4 has been made and preparation for complete modernization and automation of the boilers is made, which is planned to be realized in the next two years. The equipment has been procured by the renowned German company Sake, which is a manufacturer of burners, the German company Faber, Gestra and other reputable companies, and the commissioning was done by the authorized servicers of Sake.

 

  1. MODERNIZATION AND AUTOMATION OF THE SYSTEM FOR CHEMICAL WATER TREATMENT (CWT)

The modernization and automation of the system for chemical water treatment is in accordance with a preliminary project documentation which foresees this key process in the heat production to operate automatically. The first phase of the realization of this investment covered automation of one pair of ion exchange water filters, two sand filters and the system for preparation and brine dosing. Except the installation of new armature with appropriate electrical drives and metering equipment, also there are two units for continuous measurement of the water hardness, salt transporter, salt tank and brine tank. The automation covered the system for salt dosing and by this was replaced the hard manual labor which had to be carried away by the plant personnel This investment covered as well installation of new cable traces and new cables which is in accordance with such type of equipment. The realization of the project allowed automatic operation of the system, reduced personnel for operation of the process, and the influence of the man factor is down to a minimum. The conversion of the technology for regeneration which uses brine with constant concentration, increased the efficiency of the process, due to improved regenerations of the ion exchangers with smaller quantity of salt. The realization of this investment provided:

  • Automatic operation of the system for chemical water treatment
  • Increased efficiency and reliability of the system
  • Reduced operation costs and
  • Improved work conditions for the personnel.

The equipment which is used in this project was procured by the well established companies Siemens, Gebruder Heil, Burkert, Danfoss, NS Koncept and others, and the commissioning of the system was performed by NS Koncept.

 

  1. RECONSTRUCTION OF THE PUMP STATION IN DHP ISTOK, MODERNIZATION AND EXTENSION OF THE PUMP CAPACITY

This investment is realized within the project for reconstruction, modernization and increase of the capacity of the pumping station in DHP Istok. The aim is to provide conditions for safe and reliable operation of the pumps and to ensure water circulation through the boilers and the distribution network by increasing the efficiency of the pumping station. Existing circulating pumps are quite depreciated, older than 30 years and with low efficiency coefficients compared to modern types of pumps. For some of them, the manufacturer has stopped for a long time produce spare parts, so in case of failure there was a danger that they could not be serviced. Within this investment, two old circulating pumps (No. 7 of the first degree and the second degree) have been replaced with new ones, which have a larger capacity and a high coefficient of efficiency. Also, in order to provide quality regulation and maintain the required parameters in the distribution network, two direct single-stage circulating pumps with a flow of 600 m3/h have been procured, the capacity of which is regulated by frequency regulators. This provides a continuous change of the water flow according to the current needs of the distribution network. At the same time, the capacity of the pumping station was increased by an additional 1200 m3/h. The realization of this investment provided:

  • reliable operation of the pumping station in DHP Istok,
  • increasing the efficiency of the pumping station in DHP Istok,
  • increasing the capacity of the pumping station in DHP Istok and
  • providing equal loading of the pumping station according to the needs of the distribution network.

The equipment for realization of this investment has been procured from the renowned manufacturers KSB, Danfos, Auma-Germany, ABO Valve-Czech Republic, MIV-Croatia, the replacement of the pumps and the fittings has been made by the employees and the company Dimce Banjarot, while the commissioning has been made by authorized service technicians of the equipment manufacturers.

 

 

  1. PROCUREMENT, INSTALLATION AND PUTTING INTO OPERATION OF A 130 kVA DIESEL AGGREGATE FOR POWERING THE CRITICAL CONSUMERS IN DHP ISTOK

This investment is realized in order to provide a reliable backup power supply to the critical consumers in the district heating plant. The existing diesel aggregate in DHP Istok was older, unreliable and with low power, which did not provided all critical consumers in the heating plant to be supplied with backup electricity. This was especially evident after the installation of new sophisticated equipment that requires constant backup power for safe operation. Also, the new booster pump with which constant pressure is maintained in the distribution network is connected to this power supply, and it is planned to connect other critical consumers that will be installed in the future: the fire hydrant supply pump in the heating plant, the detection plant of natural gas leakage, fire plant, etc. As part of the investment, new fireproof canals for carrying cables, new cables to the critical consumers and equipment for their connection have been made. The realization of this investment provided:

  • reliable backup power supply to the critical consumers in DHP Istok,
  • reconstruction of the electrical installation to critical consumers in accordance with the relevant standards and
  • increasing the safety and security of the production process.

The equipment for realization of this investment has been procured by the Italian manufacturer Energy, while the installation, connection and commissioning has been performed by the company Timel from Skopje.