Waste heat efficient utilization system of sintering circular cooler
By dividing the ring cold air duct into five sections and connecting different components according to the flue gas temperature, the problem of insufficient waste heat utilization of the sintered ring cold machine is solved, and efficient utilization of waste heat and "zero" flue gas emissions are achieved.
Patent Information
- Application Number
- CN202422372560.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-28
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-28
AI Technical Summary
In the waste heat utilization of existing sintering ring chillers, most of the low-temperature flue gas cannot generate electricity, and the waste heat is insufficient, making it difficult to achieve "zero" emissions of flue gas.
The ring cold air duct is divided into five sections, with five blowers respectively, and different components are connected according to the flue gas temperature: the high-temperature section and the medium-temperature section are used for waste heat generation, the medium-temperature section is used for sintering machine, and the low-temperature section is sent to the medium-temperature section fan in the inlet, achieving "zero" flue gas emissions.
While achieving the cooling effect of sintered ore, it makes full use of waste heat for power generation and production applications, achieving "zero" flue gas emissions and improving waste heat utilization efficiency.
Smart Images
Figure CN223216707U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of waste heat utilization of ring coolers, and in particular to a system for efficiently utilizing waste heat of sintering ring coolers. Background Art
[0002] The sintering ring cooler is a key equipment in the sintering ore production line. Its process function is to drive the material-carrying trolley to rotate while blowing cooling air from bottom to top at its lower part through the ring cooling air duct. After sufficient heat exchange, the heat carried by the hot ore is taken away, thereby realizing the circulating process ring cooling of the sintered red ore and the reuse of waste heat from exhaust gas.
[0003] Existing sintering ring coolers usually utilize waste heat by using the flue gas from the high-temperature and low-temperature sections of the ring cooler to generate electricity. However, only a small amount of flue gas from the low-temperature section can be used to generate electricity, and most of it cannot, resulting in insufficient utilization of waste heat.
[0004] In view of this, the present application aims to provide a system for efficiently utilizing waste heat from a sintering ring cooler to better solve the above technical problems. Summary of the Invention
[0005] The purpose of the embodiments of the present application is to provide a sintering ring cooler waste heat efficient utilization system, which can achieve the cooling effect of sintered ore while fully utilizing the waste heat for power generation and production applications, and realize "zero" flue gas emissions.
[0006] The embodiment of the present application provides a system for efficiently utilizing waste heat from a sintering ring cooler, including a ring cooler body, a waste heat power generation component, a hot air sintering component and a hot water making component. The ring cooler body is provided with a ring cooling air duct, and five ring cooling blowers are arranged at intervals in the ring cooling air duct. The five ring cooling blowers are respectively set as blower No. 1, blower No. 2, blower No. 3, blower No. 4 and blower No. 5 according to the temperature of the ring cooling air duct from high to low, and corresponding to the five ring cooling blowers, a first stage hot exhaust gas outlet, a second stage hot exhaust gas outlet, a third stage hot exhaust gas outlet, a fourth stage hot exhaust gas outlet and a fifth stage hot exhaust gas outlet are provided in the ring cooling air duct. The first stage hot exhaust gas outlet and the second stage hot exhaust gas outlet are respectively connected to the waste heat power generation component, the third stage hot exhaust gas outlet is connected to the hot air sintering component, the fourth stage hot exhaust gas outlet is connected to the hot water making component, and the fifth stage hot exhaust gas outlet is connected to the air inlet of the No. 3 blower.
[0007] Furthermore, the No. 3 blower and the No. 5 blower are respectively configured as variable frequency speed regulating blowers.
[0008] Furthermore, the air inlets of the five ring-cooling blowers are respectively provided with a muffler and an air damper regulating valve.
[0009] Furthermore, the waste heat power generation component is provided with a dual-pressure waste heat boiler structure and a steam turbine generator set, the dual-pressure waste heat boiler structure has a flue gas inlet and a flue gas outlet, the flue gas inlet and the flue gas outlet are respectively provided with a switching damper door, the flue gas inlet is connected to the first stage hot exhaust gas outlet and the second stage hot exhaust gas outlet through an air duct, the flue gas outlet is connected to the cooling wind box of the ring cooler body through a return air duct, and the steam generated by the dual-pressure waste heat boiler structure is connected to the steam turbine generator set through a steam pipeline.
[0010] Furthermore, the return air duct is provided with a variable frequency regulating circulating fan and a control valve, and an ash discharge port is provided at the position of the control valve.
[0011] Furthermore, the hot air sintering assembly includes a sintering pipe and an ignition and combustion-supporting pipe. The sintering pipe is provided with a manual inspection door and an ash unloading funnel, and an insulation material layer is provided on the outside of the sintering pipe. The ignition and combustion-supporting pipe is provided with a dust removal structure.
[0012] Furthermore, the hot water production component is provided with a hot water exchanger.
[0013] Beneficial effects of the utility model:
[0014] The utility model provides a sintering ring cooler waste heat efficient utilization system, including a ring cooler body, a waste heat power generation component, a hot air sintering component and a hot water making component. The ring cooler body is provided with a ring cooling air duct, and five ring cooling blowers are arranged at intervals in the ring cooling air duct. The five ring cooling blowers are respectively set as blower No. 1, blower No. 2, blower No. 3, blower No. 4 and blower No. 5 according to the temperature of the ring cooling air duct from high to low, and corresponding to the five ring cooling blowers, a first stage hot exhaust gas outlet, a second stage hot exhaust gas outlet, a third stage hot exhaust gas outlet, a fourth stage hot exhaust gas outlet and a fifth stage hot exhaust gas outlet are provided in the ring cooling air duct. The first stage hot exhaust gas outlet and the second stage hot exhaust gas outlet They are respectively connected to the waste heat power generation components, the three-section hot exhaust gas outlet is connected to the hot air sintering component, the four-section hot exhaust gas outlet is connected to the hot water making component, and the five-section hot exhaust gas outlet is connected to the air inlet of the No. 3 blower. The utility model has a simple structure and a reasonable design. By dividing the ring cooling air duct into five sections according to temperature from high to low, the first and second sections of flue gas with higher temperatures are used for waste heat power generation, and the flue gas in the medium temperature section is sent to the sintering machine for utilization, the flue gas in the fourth section is used for hot water, and the hot exhaust gas in the low temperature section is connected to the fan inlet of the medium temperature section to achieve "zero" flue gas emissions, thereby reasonably utilizing the flue gas temperature and flue gas volume of each section to achieve full utilization and zero emissions. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 This is a schematic diagram of the connection between the ring cooler body and the waste heat power generation component, the hot air sintering component, and the hot water production component in some embodiments of the present invention;
[0017] Figure 2 This is a block diagram of the waste heat utilization of the exhaust gas of the ring cooler body in some embodiments of the present invention.
[0018] The reference numerals are:
[0019] Annular cooler body 1, No. 1 blower 11, No. 2 blower 12, No. 3 blower 13, No. 4 blower 14, No. 5 blower 15, first stage hot exhaust gas outlet 16, second stage hot exhaust gas outlet 17, third stage hot exhaust gas outlet 18, fourth stage hot exhaust gas outlet 19, fifth stage hot exhaust gas outlet 110, waste heat power generation component 2, dual-pressure waste heat boiler structure 21, steam turbine generator set 22, switching damper door 23, return air duct 24, frequency conversion regulating circulating fan 25, control valve 26, ash discharge port 27, hot air sintering component 3, sintering pipeline 31, manual maintenance door 311, ash unloading funnel 312, ignition and combustion-supporting pipeline 32, dust removal structure 321, hot water making component 4. DETAILED DESCRIPTION
[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.
[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0025] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0026] See also Figure 1-Figure 2 As shown, the sintering ring cooler waste heat efficient utilization system described in this embodiment includes a ring cooler body 1, a waste heat power generation component 2, a hot air sintering component 3 and a hot water making component 4. The ring cooler body 1 is provided with a ring cooling air duct, and five ring cooling blowers are arranged at intervals in the ring cooling air duct. The five ring cooling blowers are set as No. 1 blower 11, No. 2 blower 12, No. 3 blower 13, No. 4 blower 14 and No. 5 blower 15 according to the temperature of the ring cooling air duct from high to low, and correspond to the five ring cooling blowers. The annular cooling air duct is provided with a first-stage hot exhaust gas outlet 16, a second-stage hot exhaust gas outlet 17, a third-stage hot exhaust gas outlet 18, a fourth-stage hot exhaust gas outlet 19 and a fifth-stage hot exhaust gas outlet 110. The first-stage hot exhaust gas outlet 16 and the second-stage hot exhaust gas outlet 17 are respectively connected to the waste heat power generation component 2, the third-stage hot exhaust gas outlet 18 is connected to the hot air sintering component 3, the fourth-stage hot exhaust gas outlet 19 is connected to the hot water making component 4, and the fifth-stage hot exhaust gas outlet 110 is connected to the air inlet of the No. 3 blower 13.
[0027] This embodiment has a simple structure and a reasonable design. By dividing the cooling air duct into five sections according to temperature from high to low, the flue gas from the first and second sections with higher temperatures is used for waste heat power generation, the flue gas from the medium-temperature section is sent to the sintering machine for utilization, the flue gas from the fourth section is used for hot water production, and the hot exhaust gas from the low-temperature section is connected to the fan inlet of the medium-temperature section, thereby achieving "zero" flue gas emissions. Therefore, the flue gas in each section is reasonably utilized according to its temperature and volume, achieving full utilization and zero emissions.
[0028] In some embodiments, the No. 3 blower 13 and the No. 5 blower 15 are respectively configured as variable frequency speed regulating blowers.
[0029] Specifically, the air inlets of the five ring-cooling blowers are respectively provided with a muffler and an air damper regulating valve.
[0030] In this embodiment, blower No. 3 13 and blower No. 5 15 are set as variable frequency speed regulation blowers, which are convenient for flexible adjustment based on working conditions. By providing silencers and damper regulating valves at the air inlets of the five ring-cooled blowers, noise can be reduced and the air intake volume can be flexibly adjusted. In addition, a detection device can be installed to detect the operation of the blower.
[0031] In some embodiments, the waste heat power generation component 2 is provided with a dual-pressure waste heat boiler structure 21 and a steam turbine generator set 22. The dual-pressure waste heat boiler structure 21 has a flue gas inlet and a flue gas outlet. The flue gas inlet and the flue gas outlet are respectively provided with a switching damper door 23. The flue gas inlet is connected to the first-stage hot exhaust gas outlet 16 and the second-stage hot exhaust gas outlet 17 through an air duct. The flue gas outlet is connected to the cooling wind box of the annular cooler body 1 through a return air duct 24. The steam generated by the dual-pressure waste heat boiler structure 21 is connected to the steam turbine generator set 22 through a steam pipeline.
[0032] In this embodiment, by setting up a dual-pressure waste heat boiler structure 21 and a steam turbine generator set 22, the high-temperature flue gas from the first and second stages can be sent to the dual-pressure waste heat boiler structure 21, and the steam generated by the dual-pressure waste heat boiler structure 21 can be sent to the steam turbine generator set 22 for power generation, thereby realizing efficient utilization of the waste heat of the flue gas, and the hot exhaust gas after the waste heat utilization is recovered and returned to the ring cooler for reuse.
[0033] Specifically, in this embodiment, the return air duct 24 is provided with a variable frequency regulating circulating fan 25 and a control valve 26 , and an ash discharge port 27 is provided at the position of the control valve 26 .
[0034] In this embodiment, by setting a control valve 26, the temperature fluctuation range of the boiler inlet flue gas can be adjusted and the air volume can be adjusted based on the changes in the sintering material amount of the sintering ring cooler and the impact of the sintering material thickness on the flue gas. The control valve 26 needs to be made of dust-proof and high-temperature resistant materials. The ash discharge port 27 is mainly set to facilitate the cleaning of accumulated ash.
[0035] In some embodiments, the hot air sintering assembly 3 includes a sintering pipe 31 and an ignition and combustion-supporting pipe 32. The sintering pipe 31 is provided with a manual inspection door 311 and an ash unloading funnel 312. An insulation material layer is provided on the outside of the sintering pipe 31. The ignition and combustion-supporting pipe 32 is provided with a dust removal structure 321.
[0036] In this embodiment, the setting of the hot air sintering component 3 is specifically shown. The hot exhaust gas of this section can be sent to the material surface of the sintering machine by non-powered transportation and used for hot air sintering. A manual maintenance door 311 is set in the sintering pipe 31, and an ash unloading funnel 312 is set at the dust accumulation part to realize maintenance and ash removal. The exhaust gas of this section can also be dust-removed and then led to the combustion-supporting blower through the combustion-supporting blower to increase the combustion-supporting air temperature of the sintering machine ignition furnace to realize hot air ignition.
[0037] In some embodiments, the hot water production component 4 is provided with a hot water exchanger.
[0038] This embodiment specifically shows that the waste heat of the fourth section of hot flue gas is utilized by setting up a hot water exchanger. The hot water formed after heat exchange can be connected to industrial water and external network steam heating pipes for use, and this section of exhaust gas is self-circulating.
[0039] Specifically, the hot exhaust gas from the first and second sections is sent back to the ring cooler after the waste heat is utilized, and the flue gas from the fourth section is sent into the ring cooler through the air inlet of the No. 4 blower after the waste heat is utilized, thereby realizing the self-circulation of the exhaust gas in this section.
[0040] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.
Claims
1. A sintering ring cooler waste heat efficient utilization system, characterized by: It includes a ring cooling machine body, a waste heat power generation component, a hot air sintering component and a hot water making component. The ring cooling machine body is provided with a ring cooling air duct. Five ring cooling blowers are arranged at intervals in the ring cooling air duct. The five ring cooling blowers are respectively set as blower No. 1, blower No. 2, blower No. 3, blower No. 4 and blower No. 5 according to the temperature of the ring cooling air duct from high to low, and corresponding to the five ring cooling blowers, a first stage hot exhaust gas outlet, a second stage hot exhaust gas outlet, a third stage hot exhaust gas outlet, a fourth stage hot exhaust gas outlet and a fifth stage hot exhaust gas outlet are provided in the ring cooling air duct. The first stage hot exhaust gas outlet and the second stage hot exhaust gas outlet are respectively connected to the waste heat power generation component, the third stage hot exhaust gas outlet is connected to the hot air sintering component, the fourth stage hot exhaust gas outlet is connected to the hot water making component, and the fifth stage hot exhaust gas outlet is connected to the air inlet of the No. 3 blower.
2. The sintering ring cooler waste heat efficient utilization system according to claim 1 is characterized in that: The No. 3 blower and the No. 5 blower are respectively configured as variable frequency speed regulating blowers.
3. The sintering ring cooler waste heat efficient utilization system according to claim 1 is characterized in that: The air inlets of the five ring-cooling blowers are respectively provided with a muffler and an air door regulating valve.
4. The sintering ring cooler waste heat efficient utilization system according to claim 1 is characterized in that: The waste heat power generation component is provided with a dual-pressure waste heat boiler structure and a steam turbine generator set. The dual-pressure waste heat boiler structure has a flue gas inlet and a flue gas outlet. The flue gas inlet and the flue gas outlet are respectively provided with a switching damper door. The flue gas inlet is connected to the first-stage hot exhaust gas outlet and the second-stage hot exhaust gas outlet through an air duct. The flue gas outlet is connected to the cooling wind box of the ring cooler body through a return air duct. The steam generated by the dual-pressure waste heat boiler structure is connected to the steam turbine generator set through a steam pipeline.
5. The sintering ring cooler waste heat efficient utilization system according to claim 4 is characterized in that: The return air duct is provided with a frequency conversion regulating circulating fan and a control valve, and an ash discharge port is provided at the position of the control valve.
6. The sintering ring cooler waste heat efficient utilization system according to claim 1 is characterized in that: The hot air sintering assembly includes a sintering pipe and an ignition and combustion-supporting pipe. The sintering pipe is provided with a manual maintenance door and an ash unloading funnel. A heat insulation material layer is provided on the outside of the sintering pipe. The ignition and combustion-supporting pipe is provided with a dust removal structure.
7. The sintering ring cooler waste heat efficient utilization system according to claim 1 is characterized by: The hot water production component is provided with a hot water exchanger.