CN-121975982-A - Device and method for recycling slag flexible crushing waste heat

CN121975982ACN 121975982 ACN121975982 ACN 121975982ACN-121975982-A

Abstract

The invention discloses a device and a method for recycling slag flexible crushing waste heat, the device comprises a slag crushing chamber, a flexible crushing mechanism and an air cooling auxiliary mechanism are arranged in the slag crushing chamber, the flexible crushing mechanism comprises a crushing shaft connected with a driving device, a flexible crushing assembly and a flexible slag blocking assembly, the air cooling auxiliary mechanism comprises a cooling fan, an air duct and a cooling air nozzle, the design is reasonable, the principle is simple, the efficient granulation of slag is realized through the flexible crushing mechanism, the crushing energy consumption is substantially lower than that of an air quenching method, the energy consumption can be adapted to slag with different fluidity, the waste heat recovery mode of radiation and convection heat exchange is combined, atomized water is matched for auxiliary cooling, the waste heat recovery efficiency is improved, the power consumption of a fan is reduced while the full dry treatment and no water development of steel slag are ensured, the energy saving and environmental protection advantages are achieved, meanwhile, the pain point of serious abrasion of a revolving cup method is solved, the service life of equipment is prolonged, the self-cleaning function is realized, the self-cleaning equipment can be replaced quickly, the maintenance cost is low, and the equipment is stable in operation.

Inventors

LI SHUSHENG
GAO XU
ZHAO PENG
WANG CHUANCHUAN
SUN QINGHUA

Assignees

青岛达燊能源科技有限公司
青达节能工程研究院(青岛)有限公司

Dates

Publication Date: 20260505
Application Date: 20251230

Claims (10)

1. The utility model provides a flexible broken waste heat recovery's of slag device, includes slag crushing room (1), slag crushing room (1) is including being located slag import (2) of its upper portion one side, be located flue gas export (3) of its upper portion opposite side and be located slag export (4) of its lower part, slag import (2) department is provided with slag pot (5), slag pot (5) department installs tipping device (6) to through tipping device (6) control action of toppling over of steel slag, characterized in that, be provided with flexible broken mechanism (8) and air-cooled auxiliary mechanism (9) inside slag crushing room (1), flexible broken mechanism (8) are provided with slag flow equalizing mechanism (10) with slag pot (5) between, slag falls in flexible broken mechanism (8) top after flow equalizing mechanism (10), and the slag is granulated under flexible broken mechanism (8) effect to be parabolic direction spill towards flue gas export (3), and air-cooled auxiliary mechanism (9) are towards direction blowout cooling slag, make granulated slag, and the solidification of flue gas is carried out at the high temperature exhaust through the flue gas outlet (3), and the waste heat recovery is accomplished.
2. The device for recycling the flexible broken waste heat of the slag according to claim 1, wherein the slag flow equalizing mechanism (10) is a slag chute with a distributor, the slag breaking chamber (1) is built by a film wall heat exchanger (11), and an insulating layer is additionally arranged on the outer surface of the slag breaking chamber.
3. The device for recycling waste heat of slag flexible crushing according to claim 2, wherein the flexible crushing mechanism (8) comprises a crushing shaft (12), a flexible crushing assembly (13) and a flexible slag blocking assembly (14) which are connected with a driving device, the crushing shaft (12) rotates at a high speed through the driving device, the flexible crushing assemblies (13) are in multiple groups, are uniformly arranged on the crushing shaft (12) according to the axial graduation of the crushing shaft (12) and are in a centrifugal straightening state on the crushing shaft (12) rotating at the high speed, and the flexible slag blocking assembly (14) is in two groups and is symmetrically arranged at two sides of the flexible crushing assembly (13) along the axial direction of the crushing shaft (12) and is in a centrifugal straightening state on the crushing shaft (12) rotating at the high speed; The flexible crushing assembly (13) is composed of a plurality of chains distributed along the axial direction of the crushing shaft (12), one end of the flexible crushing assembly is connected with the crushing shaft (12) in a hinged mode, two groups of adjacent flexible crushing assemblies (13) with axial indexing are distributed in a staggered mode, the flexible slag blocking assembly (14) is composed of a plurality of chains distributed along the axial direction of the crushing shaft (12) in a uniformly distributed mode, one end of the flexible slag blocking assembly is connected with the crushing shaft (12) in a hinged mode, and the length of the flexible slag blocking assembly exceeds that of the flexible crushing assembly (13), so that the flexible crushing assembly (13) and the flexible slag blocking assembly (14) in a centrifugal straightening state are in an I shape as a whole.
4. A slag flexible crushing waste heat recovery device according to claim 3, wherein the tail end of the chain is movably connected with a crushing hammer.
5. The device for recycling the flexible slag crushing waste heat according to claim 3, wherein the air cooling auxiliary mechanism (9) comprises a cooling fan (15), an air duct (16) and a cooling air nozzle (17), the cooling air nozzle (17) is arranged below the flexible crushing mechanism (8) and faces the parabolic direction, one end of the air duct (16) is communicated with the cooling air nozzle (17), and the other end of the air duct is led out of the steel slag crushing chamber (1) and is connected with the cooling fan (15); The air cooling auxiliary mechanism (9) further comprises cooling water atomization spray nozzles (18), the cooling water atomization spray nozzles (18) are interacted with a cooling water pipeline, the number of the cooling water atomization spray nozzles is multiple, and the cooling water atomization spray nozzles are respectively arranged at the upper part/the top of the parabola in the cooling air nozzle (17) and the steel slag crushing chamber (1).
6. The device for recycling waste heat of flexible slag crushing according to claim 5, wherein a liquid cooling assembly (19) for cooling the flexible crushing assembly (13) is arranged below the flexible crushing mechanism (8), and the liquid cooling assembly (19) is a cooling water atomization nozzle.
7. The device for recycling the flexible broken waste heat of the slag according to claim 6, wherein a conveyor (20) is arranged at the steel slag outlet (4), the flue gas outlet (3) is connected with a waste heat boiler (7), the membrane type wall heat exchanger (11) is connected with a heat exchange pipeline and further interacts with the waste heat boiler (7), wear-resistant plates (21) are arranged on the top inner wall and the upper side wall of the steel slag breaking chamber (1) between the flexible breaking mechanism (8) and the flue gas outlet (3), and the wear-resistant plates (21) are arranged on the inner wall of the steel slag breaking chamber (1) below the flue gas outlet (3).
8. The device for recycling the waste heat of flexible slag crushing according to claim 7, wherein a translation device (22) for transverse movement is arranged on the steel slag flow equalizing mechanism (10) and/or the flexible crushing mechanism (8).
9. A method for waste heat recovery using the slag flexible breaking waste heat recovery device according to any one of claims 6-8, characterized by comprising the following specific steps: S01, pouring slag from a slag pot (5) containing the slag through a tipping device (6), wherein the slag falls into a slag flow equalizing mechanism (10) and flows towards a flexible crushing mechanism (8) through uniform distribution of the slag; s02, enabling the crushing shaft (12) to rotate at a high speed through a driving device, enabling the flexible crushing assembly (13) and the flexible slag blocking assembly (14) to straighten and rotate under the centrifugal action, enabling slag to flow down and fall down under the gravity to the flexible crushing assembly (13) rotating at a high speed, and enabling the slag to be granulated efficiently and to be scattered in the direction of a smoke outlet (3) in a parabolic manner under the action of the slag; S03, continuously working a cooling fan (15) and a cooling water atomization spray head (18), supplying cooling air to a cooling air nozzle (17) through an air duct (16), and continuously blowing atomized cooling water to the granulated and parabolic scattered steel slag, wherein in the state, the granulated steel slag is rapidly cooled and solidified into particles, falls on a conveyor (20) at a steel slag outlet (4) and is continuously sent out; s04, discharging high-temperature flue gas subjected to heat exchange from a flue gas outlet (3) to a waste heat boiler (7) for waste heat recovery, wherein in the process, a film wall heat exchanger (11) synchronously works to absorb radiant heat in a steel slag crushing chamber (1) and convey the radiant heat to the waste heat boiler (7), and finally finishing waste heat recovery; and S05, continuously working the liquid cooling assembly (19) to cool the flexible crushing assembly (13) and the flexible slag blocking assembly (14) during the process.
10. The method for recovering waste heat by using the slag flexible crushing waste heat recovery device according to claim 9, wherein in the step S02, a coordinate system is established by taking the axial center of the crushing shaft (12) as a round point, the intersection point of the flowing slag and the flexible crushing component (13) is located in a second quadrant of the coordinate system, and the angle between the cooling air nozzle (17) and the horizontal direction is 5-30 °.

Description

Device and method for recycling slag flexible crushing waste heat Technical Field The invention relates to the technical field of slag waste heat recovery, in particular to a device and a method for recovering slag flexible crushing waste heat. Background The smelting slag such as steel slag, blast furnace slag and the like is a main byproduct of steel production, the annual steel slag yield in China is about 1 hundred million tons, the blast furnace slag yield is about 3 hundred million tons, the tapping temperature is as high as 1300-1650 ℃, and abundant high-quality waste heat resources are contained. The main stream water quenching slag treatment mode at present can lead to complete waste of heat, and the dry granulation waste heat recovery technology is widely concerned with water conservation and good waste heat recovery effect, wherein the wind quenching method and the rotor method are most typical. However, the air quenching method has the defects of high energy consumption of an air source and capability of only treating high-fluidity slag, and the rotary cup method reduces the energy consumption, but the rotary cup method directly contacts the high-temperature slag to face the problems of thermal stress, mechanical stress, chemical erosion, scouring wear and the like, so that the service life is short, the maintenance is frequent and the replacement cost is high. The deficiencies of the prior art limit the efficiency and economy of smelting slag waste heat recovery, and a better treatment scheme is needed. Disclosure of Invention Aiming at the problems disclosed in the background art, the invention provides a device and a method for recycling waste heat of slag flexible crushing. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a flexible broken waste heat recovery's of slag device, includes the broken room of slag, the broken room of slag is including being located the slag import of its upper portion one side, being located the flue gas export of its upper portion opposite side and being located the slag export of its lower part, slag import department installs tipping device, but tipping device installs the slag pot of hoist and mount on the tipping device, slag pot department installs tipping device to through tipping device control action of toppling over, the flue gas export is connected with exhaust-heat boiler, characterized in that, the broken room of slag is inside to be provided with flexible broken mechanism and forced air cooling auxiliary mechanism, be provided with the slag mechanism that flow equalizes between flexible broken mechanism and the slag pot, slag falls in flexible broken mechanism top after flow equalizing through the slag mechanism that flow equalizes, the slag is granulated under flexible broken mechanism to be parabolic to the flue gas export direction scatter, forced air cooling auxiliary mechanism is towards parabolic direction blowout cooling wind, makes the slag solidification, and falls in slag export department, and the high temperature of accomplishing the heat absorption then discharges through the flue gas export, carries out waste heat recovery. The slag flexible crushing waste heat recovery device is characterized in that the slag flow equalizing mechanism is a slag chute with a distributor, the slag crushing chamber is formed by constructing a film wall heat exchanger, and an insulating layer is additionally arranged on the outer surface of the slag crushing chamber. The device for recycling the flexible broken waste heat of the slag comprises a broken shaft, a flexible broken assembly and a flexible slag blocking assembly which are connected with a driving device, wherein the broken shaft rotates at a high speed through the driving device, the flexible broken assemblies are in a plurality of groups, the flexible slag blocking assemblies are arranged on two sides of the flexible crushing assembly symmetrically along the axial direction of the crushing shaft and are in a centrifugal straightening state on the crushing shaft rotating at a high speed; The flexible slag blocking assembly consists of a plurality of chains which are uniformly distributed along the axial direction of the crushing shaft, one end of the flexible slag blocking assembly is connected with the crushing shaft in a hinging manner, two groups of flexible slag blocking assemblies which are axially indexed adjacently are distributed in a staggered manner, and one end of the flexible slag blocking assembly is connected with the crushing shaft in a hinging manner, and the length of the flexible slag blocking assembly exceeds that of the flexible slag blocking assembly, so that the flexible slag blocking assembly and the flexible slag blocking assembly in a centrifugal straightening state are integrally I-shaped. The device for recycling the waste heat of the flexible slag crushing, wherein the tail end of the