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

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

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, mg / m 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.

Price-list

selling prices for the products of the State Enterprise "VPKiTS"

from 10.02.2020 g.

product name

The selling price per unit without VAT, rub.

VAT per unit of output, rub.

The selling price per unit with VAT, rub.

Heat recovery

1

TK heat exchanger-0,2

64 194,27 12 838,85 77 033,12

2

TK heat exchanger-0,4

84 969,53 16 993,91 101 963,44

3

TK heat exchanger-0,6

111 027,58 22 205,52 133 233,10

4

TK heat exchanger-0,8

133 527,52 26 705,50 160 233,02

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. Wherein, 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 mg / m3 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. Consequently, 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.

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.