Sintering low-temperature waste heat utilization power generation device
By installing components such as a flue heat exchanger and a low-grade thermal energy turbine on the sintering machine, the heat recovery and utilization of low-temperature flue gas is realized, solving the problem of unutilized low-temperature flue gas and achieving the effects of energy saving, emission reduction and power generation.
Patent Information
- Application Number
- CN202423100336.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In the existing technology, the low-temperature flue gas in the third and fourth sections of the annular cooler of the sintering machine and at the tail of the main flue cannot be effectively recovered and utilized, resulting in heat waste and affecting the energy-saving and emission-reduction effect.
Design a sintering low-temperature waste heat utilization power generation device. Through the linkage of components such as flue gas heat exchanger, main steam collector, low-grade thermal energy steam turbine, and generator, the heat of low-temperature flue gas is recovered and utilized to generate steam that meets the needs of the low-grade thermal energy steam turbine for power generation.
It improves flue gas utilization, reduces flue gas temperature, and reduces the frequency regulation of the annular cooling fan, thus achieving the goals of energy saving, emission reduction, and efficiency improvement. The generated steam can be used for power generation by low-grade thermal energy steam turbines.
Smart Images
Figure CN223649704U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a waste heat recovery equipment field especially relates to a sintering low temperature waste heat utilization power generation device. BACKGROUND
[0002] Sintering machine is the common equipment of steel enterprise, and a large amount of waste heat is generated in the use process of sintering machine, in order to recycle and utilize these waste heat and reduce the waste of heat, the steel enterprise will configure a set of waste heat recovery device for each sintering machine, in the waste heat recovery device, the waste heat of the first section of the circular cooling machine is recovered, the high-temperature flue gas waste heat of the second section generates steam for the driving of the main exhaust fan, in addition, the low-temperature flue gas of the third section of the circular cooling machine has not been fully utilized, and the medium-temperature flue gas of the tail of the large flue of the sintering machine has the recycling value with the temperature of 250-350 DEG C, and at present, the recycling has not been carried out, therefore, the heat of the low-temperature flue gas of the third and fourth sections of the circular cooling machine and the medium-temperature flue gas of the tail of the large flue of the sintering machine is recovered, thereby realizing the energy saving and emission reduction and the far-reaching significance of reducing consumption and increasing efficiency. SUMMARY
[0003] The utility model discloses a sintering low temperature waste heat utilization power generation device, has the advantages of heat recovery, reducing consumption and increasing efficiency.
[0004] The technical scheme adopted is as follows:
[0005] A sintering low temperature waste heat utilization power generation device is arranged on the large flue of the sintering machine and the circular cooling machine, comprising a flue heat exchanger, the flue heat exchanger is arranged on the large flue of the sintering machine, the flue heat exchanger is connected with a main steam collecting header by a pipeline, the main steam collecting header is connected with a low-grade heat energy steam turbine by a pipeline, the low-grade heat energy steam turbine is connected with a generator by a transmission shaft, the low-grade heat energy steam turbine is connected with a condenser by a pipeline, the condenser is connected with a deaerator by a pipeline, a condensate pump is arranged on the pipeline between the condenser and the deaerator, the deaerator is connected with a tee joint by a pipeline, the tee joint is connected with a circular cooling boiler and the flue heat exchanger respectively, a flue gas collecting cover is arranged on the circular cooling machine, the flue gas collecting cover is connected with the circular cooling boiler by a pipeline, the circular cooling boiler is provided with a pipeline connected with the main steam collecting header, the circular cooling boiler is connected with a circular cooling fan by a pipeline, and the circular cooling fan is connected with the circular cooling machine by a pipeline.
[0006] Preferably, a flue steam collecting header is arranged on the pipeline between the flue heat exchanger and the main steam collecting header.
[0007] Preferably, a flue feedwater regulating valve is arranged on the branch pipe of the tee joint close to the flue heat exchanger.
[0008] Preferably, a circular cooling feedwater regulating valve is arranged on the branch pipe of the tee joint close to the circular cooling boiler.
[0009] Preferably, a pipe between the ring cooling boiler and the main steam collecting header is provided with a ring cooling steam collecting header.
[0010] Preferably, a pipe between the flue gas collecting cover and the ring cooling boiler is provided with a diffusion electric valve and a flue gas adjusting valve.
[0011] Preferably, a pipe between the ring cooling boiler and the ring cooling fan is provided with a flue gas discharging electric valve.
[0012] Preferably, a pipe between the tee pipe and the deaerator is provided with a feed water pump.
[0013] Compared with the prior art, the beneficial effects are that:
[0014] The utility model discloses a sintering low-temperature waste heat utilization power generation device, which recovers and utilizes the heat of low-temperature flue gas at the tail of a sintering machine large flue, improves the flue gas utilization rate, reduces the temperature of subsequent flue gas, and reduces the frequency modulation opening of a fourth-stage ring cooling fan. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a structural schematic view of the sintering low-temperature waste heat utilization power generation device of the utility model,
[0016] In the figure: 1, sintering machine large flue; 2, ring cooling machine; 3, ring cooling boiler; 4, ring cooling fan; 5, flue heat exchanger; 6, low-grade heat energy steam turbine; 7, generator; 8, flue gas adjusting valve; 9, flue gas discharging electric valve; 10, ring cooling steam collecting header; 11, flue steam collecting header; 12, main steam collecting header; 13, condensate pump; 14, deaerator; 15, feed water pump; 16, ring cooling feed water adjusting valve; 17, flue feed water adjusting valve; 18, flue gas collecting cover; 19, diffusion electric valve; 20, condenser. DETAILED DESCRIPTION
[0017] The utility model will be described further below in combination with specific embodiments, such as Figure 1 shown:
[0018] Embodiment 1: a sintering low-temperature waste heat utilization power generation device is arranged on a sintering machine large flue 1 and a ring cooling machine 2, comprising a flue heat exchanger 5, the flue heat exchanger 5 is arranged on the sintering machine large flue 1, the flue heat exchanger 5 is connected with a main steam collecting header 12 in a pipeline, the main steam collecting header 12 guarantees the uniform mixed flow of gas, the main steam collecting header 12 is connected with a low-grade heat energy steam turbine 6 in a pipeline, and the low-grade heat energy steam turbine 6 is connected with a generator 7 in a transmission shaft.
[0019] The low-grade heat energy steam turbine 6 is connected with the condenser 20 through a pipeline, the condenser 20 is connected with the deaerator 14 through a pipeline, the pipeline between the condenser 20 and the deaerator 14 is provided with the condensate pump 13, the deaerator 14 is connected with the three-way pipe through a pipeline, the three-way pipe is connected with the ring cooling boiler 3 and the flue heat exchanger 5 respectively, the ring cooling machine 2 is provided with the smoke collecting cover 18, the smoke collecting cover 18 is connected with the ring cooling boiler 3 through a pipeline, the ring cooling boiler 3 is provided with the pipeline connected with the main steam header 12, the ring cooling boiler 3 is connected with the ring cooling fan 4 through a pipeline, and the ring cooling fan 4 is connected with the ring cooling machine 2 through a pipeline.
[0020] The heat of the sintering machine flue heats the water in the flue heat exchanger 5 through the flue heat exchanger 5 to form steam, the steam enters the main steam header 12 through a pipeline, the waste heat flue gas generated by the ring cooling machine 2 is transported to the ring cooling boiler 3, the ring cooling boiler 3 heats the water through the high-temperature flue gas to generate steam and transport the steam to the main steam header 12, the main steam header 12 arranges the steam from the ring cooling boiler 3 and the flue heat exchanger 5 and then transports the steam to the low-grade heat energy steam turbine 6, the steam generated after heat exchange is mixed and has a pressure of 1.0 MPa and a temperature of 205 DEG C, which meets the use requirement of the low-grade heat energy steam turbine 6, drives the low-grade heat energy steam turbine 6 to rotate, and the rotating low-grade heat energy steam turbine 6 drives the generator 7 to rotate to generate electricity.
[0021] Meanwhile, the steam discharged from the low-grade heat energy steam turbine 6 enters the condenser 20 and condenses into water which enters the deaerator 14 to be deaerated and then is transported to the ring cooling boiler 3 and the flue heat exchanger 5 to be heat exchanged and circulated, the flue gas discharged from the ring cooling boiler 3 is cooled by the ring cooling fan 4 and then is transported to the ring cooler to be heat exchanged again.
[0022] In the embodiment 2, the sintering low-temperature waste heat power generation device is arranged on the sintering machine large flue 1 and the ring cooling machine 2 and comprises the flue heat exchanger 5, the flue heat exchanger 5 is arranged on the sintering machine large flue 1, the flue heat exchanger 5 is connected with the main steam header 12 through a pipeline, the main steam header 12 guarantees the uniform mixed flow of the gas, the pipeline between the flue heat exchanger 5 and the main steam header 12 is provided with the flue gas header 11, the main steam header 12 is connected with the low-grade heat energy steam turbine 6 through a pipeline, and the low-grade heat energy steam turbine 6 is connected with the generator 7 through a transmission shaft.
[0023] The low-grade heat energy steam turbine 6 is connected with the condenser 20 through a pipeline, the condenser 20 is connected with the deaerator 14 through a pipeline, the pipeline between the condenser 20 and the deaerator 14 is provided with the condensate pump 13, the deaerator 14 is connected with the three-way pipe through a pipeline, the three-way pipe is connected with the ring cooling boiler 3 and the flue heat exchanger 5 respectively, the branch pipe of the three-way pipe close to the flue heat exchanger 5 is provided with the flue feed water regulating valve 17, the branch pipe of the three-way pipe close to the ring cooling boiler 3 is provided with the ring cooling feed water regulating valve 16, and the pipeline between the three-way pipe and the deaerator 14 is provided with the feed water pump 15.
[0024] The ring cooling machine 2 is provided with a flue gas collecting hood 18, the flue gas collecting hood 18 is connected with the ring cooling boiler 3 through a pipeline, the pipeline between the flue gas collecting hood 18 and the ring cooling boiler 3 is provided with a diffusion electric valve 19 and a flue gas inlet adjusting valve 8, the ring cooling boiler 3 is provided with a pipeline connected with the main steam collecting header 12, the pipeline between the ring cooling boiler 3 and the main steam collecting header 12 is provided with a ring cooling steam collecting header 10, the ring cooling boiler 3 is connected with the ring cooling fan 4 through a pipeline, the pipeline between the ring cooling boiler 3 and the ring cooling fan 4 is provided with an exhaust flue gas electric valve 9, and the ring cooling fan 4 is connected with the ring cooling machine 2 through a pipeline.
[0025] Specific working process is as follows: the heat of the sintering machine flue is used to heat the water in the flue heat exchanger 5 to form steam, the steam enters the main steam collecting header 12 through a pipeline, the waste heat flue gas generated by the ring cooling machine 2 is transported to the ring cooling boiler 3, the ring cooling boiler 3 heats water through high-temperature flue gas to generate steam and transports the steam to the main steam collecting header 12, the main steam collecting header 12 arranges the steam from the ring cooling boiler 3 and the flue heat exchanger 5 and then transports the steam to the low-grade heat energy steam turbine 6, the steam generated after heat exchange has a pressure of 1.0MPa and a temperature of 205 DEG C, meets the use requirement of the low-grade heat energy steam turbine 6, drives the low-grade heat energy steam turbine 6 to rotate, the rotating low-grade heat energy steam turbine 6 drives the generator 7 to rotate to generate electricity. Meanwhile, the steam discharged from the low-grade heat energy steam turbine 6 is condensed into water in the condenser 20 and then enters the deaerator 14 to remove oxygen, and then is transported to the ring cooling boiler 3 and the flue heat exchanger 5 through the feed water pump 15 to circulate heat exchange, and the flue gas discharged from the ring cooling boiler 3 is cooled by the ring cooling fan 4 and then transported to the ring cooler to perform heat exchange again.
[0026] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application, and any non-substantial changes and replacements made by those skilled in the art on the basis of the present application all belong to the scope of protection claimed by the present application.
Claims
1. A sintering low-temperature waste heat utilization power generation device arranged on a sintering machine large flue (1) and a circular cooler (2), characterized in that: The application relates to a sintering system, which comprises a flue heat exchanger (5) arranged on a sintering machine large flue (1), wherein the flue heat exchanger (5) is connected with a main steam collecting header (12) through a pipeline, the main steam collecting header (12) is connected with a low-grade heat energy steam turbine (6) through a pipeline, the low-grade heat energy steam turbine (6) is connected with a generator (7) through a transmission shaft, the low-grade heat energy steam turbine (6) is connected with a condenser (20) through a pipeline, the condenser (20) is connected with a deaerator (14) through a pipeline, a condensate pump (13) is arranged on the pipeline between the condenser (20) and the deaerator (14), the deaerator (14) is connected with a three-way pipe through a pipeline, the three-way pipe is connected with a ring cooling boiler (3) and the flue heat exchanger (5) respectively, a flue gas collecting cover (18) is arranged on a ring cooling machine (2), the flue gas collecting cover (18) is connected with the ring cooling boiler (3) through a pipeline, the ring cooling boiler (3) is provided with a pipeline connected with the main steam collecting header (12), the ring cooling boiler (3) is connected with a ring cooling fan (4) through a pipeline, and the ring cooling fan (4) is connected with the ring cooling machine (2) through a pipeline.
2. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: A flue steam collecting header (11) is arranged on the pipeline between the flue heat exchanger (5) and the main steam collecting header (12).
3. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: A flue feed water regulating valve (17) is arranged on the branch pipe of the three-way pipe close to the flue heat exchanger (5).
4. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: A ring cooling feed water regulating valve (16) is arranged on the branch pipe of the three-way pipe close to the ring cooling boiler (3).
5. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: A ring cooling steam collecting header (10) is arranged on the pipeline between the ring cooling boiler (3) and the main steam collecting header (12).
6. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: A diffusion electric valve (19) and a flue gas adjusting valve (8) are arranged on the pipeline between the flue gas collecting cover (18) and the ring cooling boiler (3).
7. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: An exhaust gas electric valve (9) is arranged on the pipeline between the ring cooling boiler (3) and the ring cooling fan (4).
8. The sintering low-temperature waste heat power generation device according to claim 1, characterized by: A feed water pump (15) is arranged on the pipeline between the three-way pipe and the deaerator (14).