Heat utilizers
In accordance with the technical specifications TU RB 300149357.005-2016, the company established manufacturing heat recovery units (TC-0,2, TC-0,4, TC-0,6,TC-0,8). TK heat exchanger-0,2 and TC-0,4 installed in the boiler house "5th Regiment", TC-0,8 in the boiler room "Luzhesno". Republican Unitary Enterprise "BELTEI" conducted acceptance tests, whose results achieved claimed characteristics.
Specifications.
№ p / p |
Name |
TC-0,2 |
TC-0,4 |
TC-0,6 |
TC-0,8 |
1. |
type heat exchanger |
vertical fire-tube |
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2. |
Nominal heating heat exchanger, kW |
200 |
400 |
600 |
800 |
3. |
Operating pressure, MPa |
0,6 |
0,6 |
0,6 |
0,6 |
4. |
The maximum water temperature at the outlet of heat exchanger, oC |
95 |
95 |
95 |
95 |
5. |
Nominal flue gas temperature at the inlet of heat exchanger, oC |
140 |
140 |
140 |
140 |
6. |
Maximum flue gas temperature at the inlet of heat exchanger, oC |
250 |
250 |
250 |
250 |
7. |
Nominal return water inlet temperature to heat exchanger , oC |
45 |
45 |
45 |
45 |
8. |
Maximum return water inlet temperature to heat exchanger (tat), no more, oC |
70* |
70* |
70* |
70* |
9. |
The temperature of the flue gases leaving, (tyx), no more, oC |
tat +10 |
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10. |
Increased boiler efficiency as a function of tat , % |
3-6 |
3-6 |
3-6 |
3-6 |
11. |
Nominal water flow in the heat exchanger circuit, m3/no |
40 |
80 |
100 |
120 |
12. |
flue gas flow rate, no more, m 3/no |
4 000 |
8 000 |
12 000 |
16 000 |
13. |
The concentration of particulate in flue gases to the heat exchanger, no more, мг/м 3 |
300 |
300 |
300 |
300 |
14. |
temperature of the condensate at the outlet of heat exchanger, not more than ° C |
75*** |
75*** |
75*** |
75*** |
15. |
Heating surface, no less, m2 |
70 |
140 |
210 |
280 |
16. |
aerodynamic resistance, no more, on |
600** |
800** |
1000** |
1200** |
17. |
hydraulic resistance, no more, MPa |
0,05 |
0,05 |
0,05 |
0,05 |
18. |
The water volume of the heat exchanger, no less, m3 |
0,7 |
1,2 |
1,4 |
1,6 |
19. |
The diameter of the heat exchanger, mm |
530 |
720 |
820 |
920 |
20. |
Condensate consumption for irrigation, no more, m3/no |
0,5 |
1,0 |
1,5 |
2,0 |
21. |
dimensions, no more, mm: Length Width Height |
1600 1500 12000 |
1600 1500 12000 |
1600 1500 12000 |
1700 1600 12000 |
22. |
Weight, no more, kg |
4000 |
6000 |
8000 |
10000 |
*increased (more 50 oC) return water temperature at the inlet of heat exchanger complicates the process of condensation of water vapor from the flue gas and drastically reduces the actual heat output of heat exchanger.
**It is necessary to take into account the increase in the gas path of the aerodynamic resistance when using heat exchanger.
***Defined specifications condensate cleaning device.
The principle of the heat exchanger is based on the use of flue gas heat for the heating return water. The flue gases are irrigated with purified condensate at the inlet of heat exchanger, extend inside the heat exchanger tubes and cooled below the dew point temperature. При этом, they contain water vapor, condensing, flow down along the inner surfaces of the tubes and produce additional condensing heat. The crude condensate by the pump passes through the air heater unit, wherein condensate is produced, cooling to a temperature of about 350WITH, obtained by this heat is used to heat the boiler room premises.
application heat recovery condensing It helps to solve the problem with the fuel moisture by utilizing the latent heat of vaporization.
The use of heat recovery units with boilers, running on local fuels is a challenge, so as flue gases contain solid particles (ash, sazha and others.) All it requires to carry out as a pre-cleaning of flue gases using cyclones, and subsequent purification of the resulting condensate.
Purification of flue gases - this is one of the conditions of heat exchanger operation. To clean the flue gases are used to receive the cyclones allowing particulate emissions until after the cyclone 100 мг/м3 a purification factor 84-91%.
Despite the high degree of purification of flue gases during operation of the heat exchanger occurs condensate contamination of solid particles. Hence, before being discharged into the condensate drains should make its purification from impurities
Used for condensate polishing plant condensate purification.
In operation, as the need arises teploutilizatorov purification. Purification is performed by washing it with water, is sprayed by means of atomizers. Cleaning is performed without stopping boiler, operation is then carried through the bypass line.
For reference:
The use of condensing heat recovery units in the boiler room "of the 5th regiment" has improved the technical and economic boiler operation parameters:
1. Reduce the specific fuel consumption rate to a level 159,7 kg fuel equivalent / Gcal, wherein at boiler similar boilers with the same specific rate of the order 184,4 kg.u.t / Gcal;
2. Reduce the flue gas temperature to a level 45-600 WITH, wherein no heat exchanger flue gas temperature amounts to the order 160-1800 WITH;
3. Reduce the cost in 4 quarter generated 1 Gcal with 88,3 RUB / Gcal to the level of 60,7 rub. / Gcal. and change the cost structure of the boiler
Economic effect since commissioning "Reconstruction of boiler-house" 5 Regiment "in Vitebsk with the introduction of additional boilers MW with mechanized loading of fuel and the introduction of condensing heat recovery" is 134,7 tce. or 57, 1 thousand roubles. Conditionally-annual economic benefit will be 424,8 tce. or 184, 0 thousand. rub.
Implementation of these heat recovery units shown to be effective at low payback period 2,07 of the year.
Condensing heat recovery units for gas boilers
Appointment
Condensing heat recovery units for gas boilers: KTG- 0,1 (100 kW) for a boiler with power 1000 kW, KTG- 0,2 (200 kW) for a boiler with a capacity 2000 kW, KTG- 0,3 (300 kW) for a boiler with a capacity 3000 kW are designed to use the heat of exhaust flue gases for heating the water supplied to the boiler. Condensing water-tube heat exchangers are manufactured in accordance with technical specifications
ТУ BY 300149357.009 - 2018.
Specifications.
Technical characteristics of heat recovery units are given in the table
№
p / p |
Name | KTG-0,1 | KTG-0,2 | KTG-0,3 |
1. | Nominal heating heat exchanger, MW | 0,1 | 0,2 | 0,3 |
2. | Operating pressure, MPa | 0,6 | 0,6 | 0,6 |
3. | The maximum water temperature at the outlet of heat exchanger, oC | 95 | 95 | 95 |
4. | Nominal flue gas temperature at the inlet of heat exchanger, oC | 140 | 140 | 140 |
5. | Maximum flue gas temperature at the inlet of heat exchanger, oC | 250 | 250 | 250 |
6. | Nominal temperature of the return network water at the inlet to the heat exchanger , oC | 40 | 40 | 40 |
7. | Maximum temperature of the return network water at the inlet to the heat exchanger (tat), no more, oC | 70* | 70* | 70* |
8. | The temperature of the flue gases leaving, (tyx), no more, oC | 75 | 75 | 75 |
9. | Increase in boiler efficiency depending on tat , % | 3-6 | 3-6 | 3-6 |
10 | Nominal water flow in the heat exchanger circuit, m3/no | 40 | 80 | 100 |
11. | flue gas flow rate, no more, m 3/no | 4000 | 8000 | 12000 |
12. | temperature of the condensate at the outlet of heat exchanger, not more than ° C | 70 | 70 | 70 |
13. | Heating surface, no less, m2 | 57 | 114 | 171 |
14. | aerodynamic resistance, no more, on | 300** | 500** | 700** |
15. | hydraulic resistance, no more, MPa | 0,10 | 0,10 | 0,10 |
16. | Water volume , no less, m3 | 0,45 | 0,9 | 1,35 |
17. | dimensions, no more, mm:
Length L Width B Height H |
2200 1800 3800 |
2800 2200 3800 |
3000 2800 3800 |
18. | Weight, no more, kg | 2500 | 4500 | 6000 |
*increased (more 50 oC) the temperature of the return network water at the inlet to the heat exchanger hinders the process of condensation of water vapor from flue gases and sharply reduces the actual heat output of the heat exchanger.
**It is necessary to take into account the increase in the gas path of the aerodynamic resistance when using heat exchanger.