PJSC “Kherson Central Heating and Power Plant”

Reconstruction of the Kherson Central Heating and Power Plant by partly transforming it into burning solid

fuel (coal) and up to 20% of solid domestic waste

«Kherson Central Heating and Power Plant», situated on the outskirts of Kherson, was established in 1956 to operate as a part of The Single Power System in Ukraine, on 154 KV lines with an established electric power of 80 MW and a heating power of-734,7 Gcal/h.

The purpose of the Kherson Central Heating and Power Plant is to provide the heat supply to all consumers according to the temperature chart, confirmed by Kherson city executive committee; and to provide hot water that meets the sanitary code. The Kherson Central Heating and Power Plant is an enterprise that generates both heating and power.

The Kherson Central Heating and Power Plant is the main source of heat supply for 50% of Kherson’s consumers.

The Construction of the Kherson Central Heating and Power Plant was determined by the need to provide Kherson Cotton Factory with large amounts of steam, electric power and hot water.

There were two construction stages. During the first stage (1955-1958), 4 middle-pressure boilers st. №1-4 CKTI -75-39F (one boiler st. 2 currently is out of service) and 2 turbo generators PT-12-95/10 were established. During the second stage (1966-1967), there were 3 high-pressure boilers BKZ-160-100F st.№5-7 and 2 turbo generators PR-25-90/10/0,9.

In 1969 two hot water boilers were put into action to provide Kherson Cotton Factory’s district and the city with hot water.

The Kherson Central Heating and Power Plant owns 87,3 km of pipelines.

Over recent years, due to the state of the industry, the load of the industrial state turbo units has been incessantly decreasing; future process steam consumers have not been predicted, and consequently, these turbo units work with decreased efficiency factor and the underproduction of electric power.

When developing specific actions for the improvement of the main technological and economic indexes, it should be taken into consideration that the Kherson Central Heating and Power Plant is the source of heat supply for more than 50% of Kherson, and its effective and economical work is a guarantee of the social-economic development of the city.

Modern trends of the local industry and housing development do not realize the considerable increase of the heat load at the Kherson Central Heating and Power Plant. Therefore, there is no necessity for the introduction of new capacities at the Kherson Central Heating and Power Plant.

The purpose of this project is to modernize the Kherson Central Heating and Power Plant to transform it into a partial solid-fuel burning plant.

The main technical solutions are:- Top-priority actions for the reconstruction and modernization of the Kherson Central Heating and Power

Plant that will allow a gradual transition into burning solid fuel (coal) and up to 20% of solid domestic waste;

- Choice of burning soil fuel technology;- Fueling, uploading, and storage system organization;- Construction of an annex to the main building to house new equipment;- Organization of fumes filtration;- Slag removal organization;- Preservation of the existing cycle arrangement;- Reconstruction of the fire-fighting system due to fueling, uploading, and storage systems organization;- Preservation of the existing electrical capacity output system;- Reconstruction of the existing electrical supply distribution device due to new equipment installation;- process control system organization;- preservation of the existing administrative and hospital buildings.

The installation of new boiler equipment, and solid fuel burning in the circular fluidized

bed (CFB) technology allows the plant to manage such issues as:

partial natural gas substitution(60%) and the settling of ecological issues;

more efficient coal burning through multiple-particle burning;

burning with less excess air factor;

SO2 capture occurs with less calcium/Sulphur coordination (Ca/S ~1,6 -2,0);

Increased boiler load control (30-110% of nominal) without technical-and-economic

indices losses especially during decreased load;

boiler flexibility for burning a wide range of fuel, industrial and agricultural waste, and

also by-product coal with an ash content of A ≤ 55-60%, that solves problems with solid

domestic waste disposal.

Circular Fluidized Bed (CFB) coal burning technology is a technology that in the last 20 years hasdemonstrated rapid growth, accompanied by the industrial introduction of large electricitygenerating units in developed countries such as the USA, China, Finland, Poland, and Germany.

The Difference of the CFB process compared to dust-coal is that fuel particles in the inert materialof CFB is just 2-5% of its total mass. Significant heat, accumulated by inner particles in CFB, makesit thermally inert. As a result, fuel property changes (combustion heat value, ash content) are lesscritical for a CFB boiler than for a regular dust-coal one.

Modern Arrangement of a CFB boiler

1- wing-panel for steam superheating or vapor;

2- multi-stage air injection to reduce NO2;

3- front or back gravity system station;

4- burners;

5- limestone preparation system;

6- bed ash cooler;

7- air distribution gate;

8- steam or water cooling cyclone and reversing chamber;

9- steam by-pass for temperature control;

10- modular, mounting by-pass;

11- thin, cooling lining;

12- air gripper;

13- generative air heater.

Parameter Meaning

Temperature in a reaction zone: Т=850–910°С

Air force rate at 850°С Ur= 4–6 m/s

Solid fuel heat range Qri: 4–32 МJ/kg

Full particle size: d=0–6 mm.

Excess air factor: α=1,15–1,25

Primary and secondary air correlation: 60–70% : 30–40%.

Concentration of particulate matter at the top of the heating: 15–30 kg/nm3

Particulate emission: less 50 mg/nm3

Coal conversion efficiency: 0,970–0,995

Coal emission: 200–300 mg/nm3

NO2 emission: NOx<200 mg/nm3

So2 emission

(depending on the number Sulphur in coal):

less 200-400 mg/nm3

Degree of constraint of Sox Са/S=2.0: min 90%

Sorbent: limestone,,dolomite d=0–1mm.

Technological indices of coal burning in CFB

№ Name Unit Volume

1 Installed electric power MV 80.00

2 Electricity output mil. KW/h 208.20

3 Delivery of electricity mil. KW/h 187.40

4 Delivery of thermal energy k. Ghal 322.70

5 Annual fuel consumption k. ton 137.30

6 Definite estimated manufacturing cost mil. UAH. 1,791.20

7 Net Present Value (NPV) mil. UAH. 2,687.19

8 Internal rate of return (IRR) % 16.93

9 Capital repayment period year 7.00

Economic Analysis

To evaluate the economics of the investment project throughout the planning horizon, project incomes and expenses should be determined. However, a financial model have not taken into consideration source of financing and payment and repayment systems. Profit is calculated by the margin between the cost of sold electricity and heat, and intramural expenditure for it production within the steam turbine cycle at the Kherson Central Heating and Power Plant. Initial economic hypothesis – investment, price, and exploitation are provided above.

SummaryFuture Project realization results:

- The reconstruction of the Kherson Central Heating and Power Plant with parted

transformation into a solid-fuel burning one and the reduction of gas consumption by 60%.

- New burning technologies which allow the use of solid domestic waste as a part of the solid

fuel producing heating and electric energy.

The proposed Project ensures the high economic performance of PJSC “Kherson Central

Heating and Power Plant” and credit reimbursement through modern technological solutions.

The project meets all technological, organizational, legal, ecological and financial criteria. The

risk level does not exceed expectations.

The Project partly corresponds to the government priority of raising energy efficiency, the

quality of housing and utility services, ecological conditions and living standards. The realization

of the project promotes achieving the goal of the Strategy for Sustainable Development

“Ukraine 2020”, Energy Independence program, adopted by the President of Ukraine in January

2015.

The implementation of the Project will be a significant, progressive step for the support of

the Housing and Utility sector of Kherson, and will assist social and economic improvement in

the Kherson region.