Pellet circular cooler three-section waste heat recycling system
By setting up a waste heat boiler system and related equipment in the pellet ring cooler, the waste heat of flue gas is converted into steam and the waste gas is reasonably utilized, solving the problem of waste heat not being used, and efficient utilization of waste heat and cost reduction are achieved.
Patent Information
- Application Number
- CN202510871785.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-08-15
AI Technical Summary
During the production process of chain-return-global groups, the waste heat in the third section of the ring-cooling cannot be effectively utilized, resulting in energy waste and increased production costs.
Design a three-stage waste heat recovery and utilization system for the pellet ring chiller, convert the waste heat of flue gas into steam through the waste heat boiler system, and make rational use of waste gas, including the installation of heat exchange equipment, waste heat recovery fan, dust collector and booster fan.
It improves the utilization rate of waste heat of the ring-cooling machine, reduces energy waste, reduces production costs, and achieves a low-carbon and environmentally friendly production process.
Smart Images
Figure CN120488765A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of waste heat utilization of annular coolers, and in particular to a three-stage waste heat recovery and utilization system of annular coolers for pelletizing. Background Art
[0002] At present, in the process of chain-return-global pellet production, the waste heat temperature of the three ring cooling sections is about 450℃. If this large amount of waste heat cannot be reasonably utilized in production, it will cause a large amount of energy waste. Therefore, a pellet ring cooler waste heat utilization system is needed to fully recycle and utilize the generated waste heat, thereby saving production costs. Summary of the Invention
[0003] In response to the above problems, the purpose of the present invention is to provide a three-stage waste heat recovery and utilization system for a pelletizing ring cooler, which uses a boiler system to convert the waste heat of the flue gas in the three stages of the ring cooler into steam, and at the same time rationally utilizes the waste gas after passing through the waste heat boiler, thereby effectively improving the utilization rate of the waste heat of the ring cooler.
[0004] The technical solution adopted in the present invention is as follows: The present invention proposes a three-stage waste heat recovery and utilization system for a pelletizing ring cooler, which includes a ring cooler. A hot air hood is provided above the trolley on the upper part of the ring cooler wind box; a waste heat boiler system is provided above the air outlet of the hot air hood; the air inlet of the waste heat boiler system is connected to the air outlet of the hot air hood through a pipe; an exhaust gas pipe is provided on the upper part of the waste heat boiler system, and a steam pipe is provided on one side; a heat exchange device is provided inside the waste heat boiler system, and after the hot gas enters the waste heat boiler system, it exchanges heat with the heat exchange device to generate steam and is discharged from the steam pipe, and the exhaust gas after heat exchange is discharged from the exhaust gas pipe.
[0005] Furthermore, a waste heat recovery fan is provided on the outlet side of the exhaust gas duct.
[0006] Furthermore, a dust collector is provided on the outlet side of the waste heat recovery fan.
[0007] Furthermore, a booster fan is provided on the outlet side of the dust collector.
[0008] Furthermore, each pipeline is provided with an electric regulating valve.
[0009] Compared with the prior art, the present invention has the following beneficial effects: The present invention converts the waste heat of the three-stage flue gas of the ring cooler into steam with the help of the boiler system, and at the same time rationally utilizes the exhaust gas after passing through the waste heat boiler, thereby greatly improving the utilization rate of the waste heat of the ring cooler, thereby reducing energy waste, lowering production costs, and being low-carbon and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1This is a schematic diagram of the overall structure of a three-stage waste heat recovery and utilization system for a pellet ring cooler proposed in the present invention.
[0011] Among them, the figure numbers are: 1-annular cooler; 2-waste heat boiler system; 3-waste heat recovery fan; 4-dust collector; 5-boost fan. DETAILED DESCRIPTION
[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0013] See attached Figure 1 The present invention proposes a three-stage waste heat recovery and utilization system for a pelletizing ring cooler, which includes a ring cooler 1. A hot air hood is provided above the trolley on the upper part of the bellows of the ring cooler 1; a waste heat boiler system 2 is provided above the air outlet of the hot air hood; the air inlet of the waste heat boiler system 2 is connected to the air outlet of the hot air hood through a pipe; an exhaust gas pipe is provided on the top of the waste heat boiler system 2; and a steam pipe is provided on the right side of the waste heat boiler system 2.
[0014] The waste heat boiler system 2 is equipped with a heat exchange device. After entering the waste heat boiler system 2, hot gas exchanges heat with water in the heat exchange device, forming a steam-water mixture that enters the steam drum. Inside the drum, the water vapor separates and forms saturated steam at approximately 0.6 MPa, which is discharged through the steam pipe. The exhaust gas after heat exchange is discharged through the exhaust pipe, with the exhaust gas temperature at the exhaust pipe outlet being approximately 150°C.
[0015] In this embodiment, the exhaust gas pipe outlet side of the waste heat boiler system 2 is connected to a waste heat recovery fan 3; the outlet side of the waste heat recovery fan 3 is connected to a dust collector 4; the outlet side of the dust collector 4 is connected to a booster fan 5.
[0016] Each of the above pipelines is provided with an electric regulating valve.
[0017] Flue gas at approximately 450°C, discharged from the third stage of the annular cooling system, flows through the flue into waste heat boiler system 2, where it exchanges heat with water to generate steam. A portion of this steam, controlled by a separate cylinder valve, is supplied to the explosives plant to dissolve solid ammonium nitrate, while another portion is supplied to the employee bathhouse for heating bath water.
[0018] After passing through the waste heat boiler system, the flue gas is cooled to about 150°C and then passes through the waste heat recovery fan 3 and the dust collector 4 for dust removal. The dust-removed flue gas is then transported to the closed material yard through the booster fan 5. It can be used to thaw mineral powder in winter and to dry mineral powder in summer.
[0019] Matters not described in detail in this invention are all known technologies.
[0020] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.
Claims
1. A pelletizing ring cooler three-stage waste heat recovery and utilization system, comprising a ring cooler, characterized in that: A hot air hood is provided above the trolley on the upper part of the ring cooler wind box; a waste heat boiler system is provided above the air outlet of the hot air hood; the air inlet of the waste heat boiler system is connected to the air outlet of the hot air hood through a pipe; an exhaust gas pipe is provided on the upper part of the waste heat boiler system, and a steam pipe is provided on one side; a heat exchange device is provided inside the waste heat boiler system, and after the hot gas enters the waste heat boiler system, it exchanges heat with the heat exchange device to generate steam and is discharged from the steam pipe, and the exhaust gas after heat exchange is discharged from the exhaust gas pipe.
2. The pelletizing ring cooler three-stage waste heat recovery system according to claim 1 is characterized in that: A waste heat recovery fan is provided on the outlet side of the exhaust gas pipe.
3. The pelletizing ring cooler three-stage waste heat recovery system according to claim 2 is characterized in that: A dust collector is provided on the outlet side of the waste heat recovery fan.
4. The pelletizing ring cooler three-stage waste heat recovery and utilization system according to claim 3 is characterized in that: A booster fan is provided on the outlet side of the dust collector.
5. The pelletizing ring cooler three-stage waste heat recovery system according to claim 1 is characterized in that: Each pipeline is equipped with an electric regulating valve.