Flue gas waste heat utilization system of sintering circular cooler
By designing a flue gas waste heat utilization system in the sintering ring cooling equipment, the problem of underutilization of high-temperature gases is solved, and efficient energy utilization and environmental protection goals are achieved.
Patent Information
- Application Number
- CN202421920020.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The high-temperature gas generated by the sintered ring cooling equipment during the ring cooling process is not fully utilized, resulting in energy waste and environmental thermal pollution.
A waste heat utilization system for the sintered ring cooler is designed, which is connected to the boiler system through the ring-cooling third section and the ring-cooling fourth section respectively, and the ring-cooling fifth section is connected in series with the blower of the ring-cooling fourth section to realize the cascade utilization of the flue gas.
The exhaust heat of the flue gas in the ring-cooling machine is fully utilized, the energy consumption of the sintering process is reduced, the quality of sintered minerals is improved, and the environmental protection and ultra-low emission requirements are met.
Smart Images
Figure CN222895537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sintering ring cooling, in particular to a sintering ring cooler flue gas waste heat utilization system. Background Art
[0002] The main function of the sintering process is to transform powdered iron ore, fuel (such as coke powder, anthracite powder, etc.), flux (such as limestone, dolomite, etc.) and other raw materials into sintered ore with certain strength and metallurgical properties through heating and a series of physical and chemical reactions.
[0003] Large-scale metallurgical sintering plants often use sintering ring cooling equipment for sintering operations. Sintering ring cooling equipment is divided into several specifications of different lengths and widths according to the sintering area. Users can choose according to their output or site conditions. The larger the sintering area, the higher the output.
[0004] The cooling process of sintering ring cooling equipment generates a lot of waste heat. At present, the high-temperature gas generated by the third, fourth and fifth stages of sintering ring cooling is usually not fully utilized, and is directly discharged or simply treated, resulting in energy waste and environmental thermal pollution. Utility Model Content
[0005] The utility model aims to provide a sintering ring cooler flue gas waste heat utilization system to solve the above technical problems.
[0006] The utility model provides a sintering ring cooler flue gas waste heat utilization system, comprising a ring cooler trolley and a boiler system, the ring cooler trolley is provided with a third ring cooler section, a fourth ring cooler section and a fifth ring cooler section, the third ring cooler section and the fourth ring cooler section are respectively connected in a circulation manner with the boiler system, the third ring cooler section, the fourth ring cooler section and the fifth ring cooler section are respectively installed with blowers, the fifth ring cooler section is connected in series with the blower of the fourth ring cooler section, and the boiler system is provided with a steam heat exchanger and a hot water heat exchanger.
[0007] Furthermore, chimneys and flue gas recovery pipes are respectively arranged on the wind hoods of the third and fourth ring cooling sections, and the third and fourth ring cooling sections are respectively connected to the flue gas inlet of the boiler system through the corresponding flue gas recovery pipes, and chimney valves and flue gas recovery valves are respectively installed on the chimney and the flue gas recovery pipe.
[0008] Furthermore, a flue gas outlet is arranged at the bottom of the boiler system, and the flue gas outlet is connected to the wind boxes of the third ring cooling section and the fourth ring cooling section through a flue gas circulation pipeline.
[0009] Furthermore, a circulating fan is installed on the flue gas circulation duct, and a temperature detector and a pressure detector are provided on the flue gas circulation duct.
[0010] Furthermore, a first branch pipe, a second branch pipe and a third branch pipe are installed on the flue gas circulation duct, and the two ends of the first branch pipe and the second branch pipe are respectively connected to the flue gas circulation duct and the bellows of the third ring cooling section, and the two ends of the third branch pipe are respectively connected to the flue gas circulation duct and the bellows of the fourth ring cooling section.
[0011] Furthermore, the first branch pipe, the second branch pipe and the third branch pipe are respectively provided with branch pipe valves, and the first branch pipe, the second branch pipe and the third branch pipe are respectively provided with gas flow meters.
[0012] Furthermore, the chimney located on the annular cooling four-stage wind hood is provided with a hot air sintering pipeline, and a hot air sintering valve is installed on the hot air sintering pipeline.
[0013] Furthermore, a chimney is arranged on the wind hood of the fifth stage of ring cooling, and the chimney located on the wind hood of the fifth stage of ring cooling is provided with a smoke duct, and the smoke duct is connected in series with the blower of the fourth stage of ring cooling, and a smoke valve is arranged on the smoke duct.
[0014] Furthermore, the flue gas recovery pipeline and the flue gas pipeline are provided with a temperature detector, a pressure detector and a gas flow meter.
[0015] Furthermore, the third ring cooling section, the fourth ring cooling section and the fifth ring cooling section are respectively connected to the blower through a fan outlet pipe, and a fan outlet valve is provided on the fan outlet pipe.
[0016] The utility model realizes the cascade utilization of the flue gas of the ring cooling machine, ensures the full utilization of the waste heat of the flue gas of the ring cooling machine, reduces the energy consumption of the sintering process, improves the quality of the sintered minerals, and meets the requirements of environmental protection and ultra-low emission. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the structure of the utility model;
[0019] Description of reference numerals:
[0020] In the figure: 1-annular cooling machine trolley, 11-wind hood, 12-bellows box, 2-boiler system, 21-smoke inlet, 22-smoke outlet, 23-smoke outlet pipe, 24-waste heat boiler, 25-hot water heat exchanger, 3-annular cooling three sections, 4-annular cooling four sections, 5-annular cooling five sections, 61-chimney, 62-chimney valve, 63-smoke recovery pipeline, 64-smoke recovery valve, 65-hot air sintering pipeline, 66-hot air sintering valve, 67-smoke pipeline, 68-smoke valve, 71-blower, 72-blower outlet pipeline, 73-blower outlet valve, 74-smoke circulation pipeline, 75-circulating fan, 76-first branch pipe, 77-second branch pipe, 78-third branch pipe, 79-branch valve; DETAILED DESCRIPTION
[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] Example 1
[0025] like Figure 1 As shown:
[0026] A sintering ring cooler flue gas waste heat utilization system comprises a ring cooler trolley 1 and a boiler system 2. The ring cooler trolley 1 is provided with a third ring cooler section 3, a fourth ring cooler section 4 and a fifth ring cooler section 5. Adjacent cooling sections are separated by retaining walls.
[0027] Chimneys 61 and flue gas recovery pipes 63 are respectively provided on the wind hoods 11 of the third and fourth ring cooling sections 3 and 4 , and the third and fourth ring cooling sections 3 and 4 are respectively connected to the flue gas inlet 21 of the boiler system 2 through corresponding flue gas recovery pipes 63 .
[0028] The chimney 61 and the flue gas recovery pipe 63 of the third ring cooling section 3 and the fourth ring cooling section 4 are respectively installed with a chimney valve 62 and a flue gas recovery valve 64.
[0029] The boiler system 2 includes a waste heat boiler and a hot water heat exchanger 25. A steam heat exchanger 24 is installed in the waste heat boiler. The steam heat exchanger 24 consists of an evaporator, a superheater and an economizer. The flue gas of the waste heat boiler passes through the steam heat exchanger 24 and the hot water heat exchanger 25 respectively to recover the waste heat.
[0030] The boiler system 2 is taken from the top wind hood 11 of the ring cooling machine trolley 1 and enters the system through the flue gas inlet 21. The waste heat boiler can produce hot water or steam through waste heat recovery to supply other work sections. The hot water heat exchanger 25 produces hot water for reuse by exchanging heat with high-temperature flue gas.
[0031] The steam is used to heat the mixed materials in the first mixing plant, second mixing plant and ore tank, to blow steam on the material surface of the sintering machine, to heat the steel mud in the steel mud pool, and the surplus steam is incorporated into the company's steam pipeline network nearby; the hot water generated is led to the first mixing plant for process water addition and steel mud pool water addition.
[0032] A flue gas outlet 22 is installed at the bottom of the boiler system 2 , and the flue gas outlet 22 is connected to the wind boxes 12 of the third ring cooling section 3 and the fourth ring cooling section 4 through a flue gas circulation duct 74 .
[0033] A circulating fan 75 is installed on the flue gas circulation duct 74 , and the flue gas outlet 22 of the boiler system 2 is connected to the circulating fan 75 through the flue gas outlet pipe 23 . A temperature detector and a pressure detector are provided on the flue gas circulation duct 74 , and a pressure detector is provided on the flue gas outlet pipe 23 .
[0034] The first branch pipe 76, the second branch pipe 77 and the third branch pipe 78 are installed on the flue gas circulation duct 74. The two ends of the first branch pipe 76 and the second branch pipe 77 are respectively connected to the flue gas circulation duct 74 and the wind box 12 of the third ring cooling section 3. The two ends of the third branch pipe 78 are respectively connected to the flue gas circulation duct 74 and the wind box 12 of the fourth ring cooling section 4.
[0035] The first branch pipe 76 , the second branch pipe 77 and the third branch pipe 78 are respectively provided with branch pipe valves 79 , and the first branch pipe 76 , the second branch pipe 77 and the third branch pipe 78 are respectively provided with gas flow meters.
[0036] A hot air sintering pipe 65 is provided on the chimney 61 located on the annular cooling four-stage 4 wind hood 11. The hot air sintering pipe 65 is arranged on the chimney 61 between the annular cooling four-stage 4 wind hood 11 and the chimney valve 62. A hot air sintering valve 66 is installed on the hot air sintering pipe 65.
[0037] Blowers 71 are installed on the third section 3 of the ring cooling, the fourth section 4 of the ring cooling and the fifth section 5 respectively. The bottom bellows 12 of the third section 3 of the ring cooling, the fourth section 4 of the ring cooling and the fifth section 5 are connected to the blowers 71 through fan outlet pipes 72 respectively. A fan outlet valve 73 is arranged on the fan outlet pipes 72.
[0038] A chimney 61 is arranged on the wind hood 11 of the fifth section 5 of the ring cooling, and a chimney valve 62 and a smoke duct 67 are arranged on the chimney 61 located on the wind hood 11 of the fifth section 5 of the ring cooling. The smoke duct 67 is arranged on the chimney 61 between the wind hood 11 of the fifth section 5 of the ring cooling and the chimney valve 62. The smoke duct 67 is connected in series with the blower 71 of the fourth section 4 of the ring cooling, and a smoke valve 68 is arranged on the smoke duct 67.
[0039] The flue gas recovery duct 63 and the flue gas duct 67 are provided with a temperature detector, a pressure detector and a gas flow meter.
[0040] When the system is activated: close the chimney valve 62 of the third section 3, the fourth section 4 and the fifth section 5 of the ring cooling and the blower 71 at the bottom of the third section 3 of the ring cooling; open the smoke recovery valve 64 of the third section 3 and the fourth section 4 of the ring cooling, the smoke valve 68 of the fifth section 5 of the ring cooling, the branch valve 79 on the first branch pipe 76, the second branch pipe 77 and the third branch pipe 78 and the circulating fan 75. The annular cooling flue gas passes through the flue gas recovery pipe 63 of the annular cooling third section 3 and the annular cooling fourth section 4 through the flue gas inlet 21 and enters the boiler system 2 for heat exchange. The flue gas after heat exchange leaves the boiler system 2 through the flue gas outlet 22, and the flue gas passes through the circulating fan 75 and enters the annular cooling third section 3 and the annular cooling fourth section 4 to re-participate in cooling the sintered ore and make full use of the heat of the tail gas. The flue gas temperature discharged from the chimney 61 on the annular cooling fourth section 4 is 120-150°C, which is used for hot air ignition and hot air sintering; at the same time, the flue gas in the annular cooling fifth section 5 enters the annular cooling fourth section 4, a part of which is circulated for heat exchange, and the other part is discharged through the chimney 61 on the annular cooling fourth section 4 to participate in hot air ignition and hot air sintering.
[0041] When the system is under maintenance: the smoke recovery valve 64 of the third ring cooling section 3 and the fourth ring cooling section 4, the smoke valve 68 of the fifth ring cooling section 5, the branch pipe valves 79 on the first branch pipe 76, the second branch pipe 77 and the third branch pipe 78 and the circulating fan 75 are closed; the chimney valve 62 of the third ring cooling section 3, the fourth ring cooling section 4 and the fifth ring cooling section 5 and the blower 71 at the bottom of the third ring cooling section 3 are opened, and the smoke in the ring cooling machine trolley 1 is discharged into the atmosphere through the chimney 61 of the third ring cooling section 3, the fourth ring cooling section 4 and the fifth ring cooling section 5.
[0042] The system also has a control system, which includes a PLC controller. The PLC controller is electrically connected to the temperature detector, pressure detector and gas flow meter on the flue gas recovery duct 63 and the flue gas duct 67, the PLC controller is electrically connected to the temperature detector and pressure detector on the flue gas circulation duct 74, and the pressure detector on the flue gas outlet pipe 23, the PLC controller is electrically connected to the gas flow meters on the first branch pipe 76, the second branch pipe 77 and the third branch pipe 78, and the PLC controller is connected to the chimney valve 62, the flue gas recovery valve 64, the hot air sintering valve 66, the flue gas valve 68, the fan outlet valve 73 and the three branch pipe valves 79.
[0043] The control system is used to monitor the operating status of the entire system and automatically adjust the working status of each part according to the set program to optimize the waste heat utilization efficiency.
[0044] The utility model realizes the cascade utilization of the flue gas of the ring cooling machine, ensures the full utilization of the waste heat of the flue gas of the ring cooling machine, improves the energy utilization rate, reduces the energy consumption of the sintering process, improves the quality of the sintered minerals, and meets the requirements of environmental protection and ultra-low emission.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A sintering ring cooler flue gas waste heat utilization system, characterized in that It includes a ring cooling machine trolley and a boiler system. The ring cooling machine trolley is provided with a third ring cooling section, a fourth ring cooling section and a fifth ring cooling section. The third ring cooling section and the fourth ring cooling section are respectively connected to the boiler system in a circulation manner. Blowers are respectively installed on the third ring cooling section, the fourth ring cooling section and the fifth ring cooling section. The fifth ring cooling section is connected in series with the blower of the fourth ring cooling section. The boiler system is provided with a steam heat exchanger and a hot water heat exchanger.
2. The sintering ring cooler flue gas waste heat utilization system according to claim 1 is characterized in that: A chimney and a flue gas recovery pipe are respectively arranged on the wind hoods of the third and fourth ring cooling sections. The third and fourth ring cooling sections are respectively connected to the flue gas inlet of the boiler system through the corresponding flue gas recovery pipes. A chimney valve and a flue gas recovery valve are respectively installed on the chimney and the flue gas recovery pipe.
3. The sintering ring cooler flue gas waste heat utilization system according to claim 1 is characterized in that: A flue gas outlet is arranged at the bottom of the boiler system, and the flue gas outlet is connected to the wind boxes of the third ring cooling section and the fourth ring cooling section through a flue gas circulation pipeline.
4. The sintering ring cooler flue gas waste heat utilization system according to claim 3 is characterized in that: A circulating fan is installed on the flue gas circulation pipeline, and a temperature detector and a pressure detector are provided on the flue gas circulation pipeline.
5. The sintering ring cooler flue gas waste heat utilization system according to claim 3 is characterized in that: The flue gas circulation duct is installed with a first branch pipe, a second branch pipe and a third branch pipe, the two ends of the first branch pipe and the second branch pipe are respectively connected to the flue gas circulation duct and the bellows of the third ring cooling section, and the two ends of the third branch pipe are respectively connected to the flue gas circulation duct and the bellows of the fourth ring cooling section.
6. The sintering ring cooler flue gas waste heat utilization system according to claim 5 is characterized in that: The first branch pipe, the second branch pipe and the third branch pipe are respectively provided with branch pipe valves, and the first branch pipe, the second branch pipe and the third branch pipe are respectively provided with gas flow meters.
7. The sintering ring cooler flue gas waste heat utilization system according to claim 2 is characterized in that: The chimney located on the annular cooling four-stage wind hood is provided with a hot air sintering pipeline, and a hot air sintering valve is installed on the hot air sintering pipeline.
8. The sintering ring cooler flue gas waste heat utilization system according to claim 2 is characterized in that: A chimney is arranged on the wind hood of the fifth stage of the ring cooling, and a smoke pipe is arranged on the chimney located on the wind hood of the fifth stage of the ring cooling, and the smoke pipe is connected in series with the blower of the fourth stage of the ring cooling, and a smoke valve is arranged on the smoke pipe.
9. The sintering ring cooler flue gas waste heat utilization system according to claim 8, characterized in that: The flue gas recovery pipeline and the flue gas pipeline are provided with a temperature detector, a pressure detector and a gas flow meter.
10. The sintering ring cooler flue gas waste heat utilization system according to claim 1, characterized in that: The third ring cooling section, the fourth ring cooling section and the fifth ring cooling section are respectively connected to the blower through a fan outlet pipe, and a fan outlet valve is arranged on the fan outlet pipe.