Recuperators for steel industry

Plate rolling production
Plate rolling shop for production of hot rolled products. Heating slabs before rolling.

Walking beam furnaces.

The project of replacing the failed sections of the old tube recuperator with all connecting dimensions kept.

The heating temperature of the combustion air increased from 140 degrees (obsolete recuperator) to 380 – 450 degrees, which ensures the stated payback period of the equipment.

Year of implementation
2015

Scope of delivery
Recuperator manufacturing, delivery, installation supervision and commissioning.

Result
During operation all the performance parameters, the declared efficiency and payback period have been achieved.

Inspection confirmed no defects detected in 2016

PERFORMANCE PARAMETERS
(per 1 section):

HOT SIDE

COLD SIDE

Inlet temperature, °С
950
0

Outlet temperature, °С
644
464

Flow rate, Nm3 / h
31 000
24 300

Pressure drop in channels, mm. WG
10
144

Thermal power, kW
4 198

Thermal efficiency, %
48,8

Plate rolling shop for production of hot rolled products. Heating slabs before rolling.

№ 1,2,3 walking beam furnaces.

The modernization program of the energy system of plate rolling mill. The project of replacing the failed sections of the tube recuperator.

The temperature of the combustion air increased to 450 degrees, which provided access to the planned savings on natural gas and allowed excluding one out of two working exhaust fan in waste heat boiler room, as well as to raise the temperature of steam produced.

Year of implementation
2015-2016

Scope of delivery
Recuperator manufacturing, delivery, installation supervision and commissioning.

Result
During operation all the performance parameters, the declared efficiency and payback period have been achieved.

PERFORMANCE PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
1 000
0

Outlet temperature, °С
675
449

Flow rate, Nm3 / h
163 500
141 665

Pressure drop in channels, mm. WG
24
531

Thermal power, kW
23 738

Thermal efficiency, %
44,9

Section and billet mills
Section and billet mills. Heating the workpiece before rolling.

Walking beam furnace

The project of replacing the failed sections of the tube recuperator with all connecting dimensions kept (“disassembly-assembly” option) as part of the investment program.

Result
During operation all the performance parameters, the declared efficiency and payback period have been achieved.

OPERATIONAL PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
920
20

Outlet temperature, °С
702
400

Flow rate, Nm3 / h
27 500
21 500

Pressure drop in channels, mm. WG
5
271

Thermal power, kW
3 026

Thermal efficiency, %
40,8

Forging mills
Forging and press mills

Reheating furnace

The project of replacing the failed sections of the tube recuperator with all connecting dimensions kept (“disassembly-assembly” option) as part of the investment program.

Result
During operation all the performance parameters, the declared efficiency and payback period have been achieved.

OPERATIONAL PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
1 000
15

Outlet temperature, °С
700
400

Flow rate, Nm3 / h
4 000
3 750

Pressure drop in channels, mm. WG
13
46

Thermal power, kW
535

Thermal efficiency, %
39,1

Blast furnaces
Blast shop.

Air preheaters (cowper stoves)

The project of the heat recovery system of flue gases after cowper stoves for heating water in utility buildings.

Approved in the framework of the investment program for 2018-2020 .

OPERATIONAL PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
205
50

Outlet temperature, °С
72
100

Flow rate, Nm3 / h
120 000
100

Pressure drop in channels, mm. WG
21
2047

Thermal power, kW
6 027

Heat treatment
Forging and press shop.

Heat treatment furnace.

Building of a new furnace according to a metallurgical plant modernization program.

Year of implementation
2015

Scope of delivery
Recuperator manufacturing, delivery, installation supervision and commissioning.

Результат
During operation all the performance parameters, the declared efficiency and payback period have been achieved.

PERFORMANCE PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
900
10

Outlet temperature, °С
559
451

Flow rate, Nm3 / h
4 100
3 700

Pressure drop in channels, mm. WG
43
29

Thermal power, kW
606

Thermal efficiency, %
49,6

ТЭЦ ПВС
Thermal power plant. Steam boiler room

TGM-151 / B boiler

The project of replacing rotary air preheaters (APH) with OPT recuperators to increase the temperature of the air supplied to the burners of the boiler.

Approved in the framework of the investment program for 2018

PERFORMANCE PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
371
30

Outlet temperature, °С
201
300

Flow rate, Nm3 / h
258 993
174 689

Pressure drop in channels, mm. WG
98
78

Thermal power, kW
17 287

Thermal efficiency, %
79,3

Bucket drying stand
Steelmaking shop.

Recuperator of combustion air preheating.

New construction.

Accepted for implementation.

PERFORMANCE PARAMETERS:

HOT SIDE

COLD SIDE

Inlet temperature, °С
800
0

Outlet temperature, °С
647
337

Flow rate, Nm3 / h
600
320

Pressure drop in channels, mm. WG
3
3

Thermal power, kW
40