HEAT RECOVERY FROM WASTE HOT WATER

Waste hot water is one of the recoverable energy sources for all companies. This energy is recovered and reused in company by heat recovery systems instead of being disposed of. When energy costs and low payback periods are considered, the heat recovery system from hot waste water is a profitable investment.

The heat recovery system from waste hot water reduces the energy intensity of company It provides benefits to the national economy by reducing energy consumption and contributes to reducing carbon footprint by decreasing the amount of CO2 released into the atmosphere.

Textile dyehouses have a large amount of dyed waste hot water capacity. With the waste hot water heat recovery system, dyehouses will act in accordance with the ” Integrated Pollution Prevention and Control Regulation for the Textile Sector ” published by the Ministry of Environment, Urbanization and Climate Change.

Developed by Ozlu Engineering, the waste heat recovery system from waste hot water is a compatible solution for all industries, especially in textile dyehouses. The system is designed for waste hot water with a flow rate ranging from 10m³/h to 100m³/h and a temperature of 50 °C or higher.

The advantages of a heat recovery system from waste hot water are as follows:
– Reduction of energy cost
– Increase in production speed
– Decrease in energy intensity
– Reduction of carbon footprint
– Low temperature drainage of waste water
– Electric energy savings in pumps with inverter control
– Short-term return on investment
– Strong competition

WORKING PRINCIPLE

The waste hot water generated from all processes in the company is passed through a mechanical filter and then collected in the waste water tank.

The hot water sucked from the waste hot water tank by the waste water pump is pressed into the self-cleaning automatic filter. After the automatic filter, the primary circuit of the water-to-water plate heat exchanger is pressed. Cold water from the soft water tank is sent to the secondary circuit of the heat exchanger. Thus, the soft cold water is heated by the energy of the waste hot water. Thanks to the plate heat exchanger, soft hot water is produced at temperatures up to 7°C below the waste hot water temperature. While the waste hot water is drained in a cooled state, soft hot water is sent to the hot water tank.

The plate heat exchanger used in the system is cleaned with an automatic backwashing system at certain intervals.

The waste heat recovery system from hot water has a fully automatic PLC-controlled remote monitoring system. Thanks to this remote monitoring system, the heat recovery system canbe monitored, controlled and intervened 24/7.

THE EQUIPMENT USED;

MECHANICAL FILTER

It is located first in the waste hot water tank. It prevents coarse waste from going to the waste water tank.

WASTE WATER PUMPS

These are the pumps that press the waste hot water from the waste water tank to the automatic filter. It works with frequency control.

AUTOMATIC FILTER

It is located before the plate heat exchanger. It has a washing system that works automatically and cleans itself by waste hot water. It protects the heat exchanger against contamination.

PLATED HEAT EXCHANGER

It is a plate heat exchanger that provides heat transfer from water to water, specially designed for this system.

MECHANICAL EQUIPMENT

As mechanical equipment that provides automatic control of the system; proportional valve, electromagnetic flow meter, pneumatic actuated butterfly valves are used.

AUTOMATION, PLC, PC

The automation panel is shipped with the system after all tests are performed in our workshop. System software is created by Özlü Mühendislik and can be monitored 24/7 via PC.

ENERGY CALCULATION

ENERGY CALCULATION OF HEAT RECOVERY SYSTEM FROM WASTE HOT WATER:  (For 20 m³/h system)
INLET TEMPERATURE OF WASTE WATER 60,00 °C
OUTLET TEMPERATURE OF WASTE WATER 28,00 °C
AMOUNT OF HEAT GAINED 640000,00 kcal/h
INLET TEMPERATURE OF CLEAN WATER 20,00 °C
OUTLET TEMPERATURE OF CLEAN WATER 54,00 °C
AMOUNT OF HOT WATER FLOW RATE 18,82 m³/h
NATURAL GAS SAVE PER DAY 69,82 m³/h
INITIAL INVESTMENT COST AND NATURAL GAS UNIT PRICES SHOULD BE TAKEN INTO ACCOUNT FOR DEPRECIATION CALCULATION.

RECYCLING REFERENCES

COMPANY NAME  CAPACITY (m3/h) COMMISSIONING DATE
1. PARLAMIŞ TEKSTİL 30 2008
2. İLAY TEKSTİL 50 2010
3. İLAY TEKSTİL 15 2016
4. BEZTAŞ TEKSTİL 50 2011
5. GÜLCEMAL TEKSTİL 40 2012
6. SATEKS TEKSTİL 15 2013
7. GÖZDE BASKI APRE BOYA 30 2013
8. MERSU TEKSTİL 30 2012
9. FİNBER HOLDİNG 30 2015
10. ACARSOY TEKSTİL 30 2016
11. KIRAYTEKS TEKSTİL 30 2016
12. CİHANGİR TEKSTİL 20 2016
13. WE TEKS TEKSTİL 40 2017
14. GÜL TEKSTİL DOKUMA VE İPLİK 30 2019
15. BİSEM – PARADİSE TEKSTİL 40 2020
16. KONYALILAR TEKSTİL 20 2021
17. PALMİYE DOKUMA İPLİK TEKSTİL 90 2021
19. SIEMENS 40 2022
20. VAROĞLU KARDEŞLER TEKSTİL 30 2022
21. FARBEN BOYA BASKI APRE 25 2022