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Centrifugal high-temperature slag waste heat recovery optimization system

A waste heat recovery and slag technology, applied in the fields of waste heat recovery and resource recycling, can solve problems such as insufficient waste heat recovery, and achieve the effect of improving the recovery rate

Pending Publication Date: 2021-08-06
BEIJING UNIV OF TECH
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Problems solved by technology

[0005] The present invention provides an optimization system for recovering waste heat from high-temperature slag based on a centrifugal method, and theoretically analyzes the relevant heat transfer process in the collector system and the rotating cup device, which can effectively solve the problem of insufficient recovery of waste heat in high-temperature slag at present problem, providing a basic theoretical analysis for improving the recycling rate of resources

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  • Centrifugal high-temperature slag waste heat recovery optimization system
  • Centrifugal high-temperature slag waste heat recovery optimization system
  • Centrifugal high-temperature slag waste heat recovery optimization system

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Embodiment Construction

[0039] The centrifugal rotating cup waste heat recovery system is optimized by adopting parallel or series-parallel collector systems.

[0040] Using a rotating cup waste heat recovery optimization system with r heat collectors connected in parallel, the heat transfer equation and energy equation of each branch are as follows:

[0041] Q e = c p m e (T out,e -T in,e )

[0042] Q e =k e A e Δt e

[0043] Among them, e represents the e-th collector in the collector system, and Q e is the amount of heat exchange on the eth collector, m eis the mass of the fluid on the eth collector, T out,e and T in,e are respectively the outlet and inlet temperatures of the e-th collector fluid, k e is the comprehensive heat transfer coefficient on the e-th heat collector (assuming that the outer surface temperature of the heat collector corresponding to the rotating cup is a constant value), A e is the heat transfer area of ​​the eth collector, Δt e is the logarithmic mean tempe...

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Abstract

The invention provides a centrifugal high-temperature slag waste heat recovery optimization system which mainly comprises a heat collector system and a rotating cup device. Thermodynamic theory analysis is carried out on the system. The heat collector system is installed on a rotating cup and is composed of heat collector devices in parallel connection or series-parallel connection; and the rotating cup device is composed of a variable frequency motor and a transverse rotating cup. Liquid slag enters the rotating cup through a heat insulation slag flowing groove, heat is dissipated to the external environment through the cup wall after being subjected to the comprehensive heat transfer process between the high-temperature slag and the low-temperature rotating cup, and then waste heat is absorbed and brought out through cold air of heat collectors. The variable frequency motor drives the rotating cup to rotate, and the slag is granulated under the action of centrifugal force.

Description

technical field [0001] The invention belongs to the field of waste heat recovery and resource recovery and utilization in the blast furnace ironmaking process, and in particular relates to an optimization system for recovery of waste heat from centrifugal high-temperature slag. Background technique [0002] At present, the most widely used method for recovering high-temperature slag waste heat in the iron and steel industry is the water quenching method. The water quenching method can obtain an amorphous glass phase, but this method will cause the loss of a large amount of water resources and high-quality heat, and the granulated slag particles must be It needs to be further dried before it can be used, resulting in secondary waste of energy. Therefore, the study of new high-temperature slag granulation and waste heat recovery is the main research direction in the energy field. [0003] In the field of new high-temperature slag, dry centrifugal granulation and waste heat re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/08C21B3/06F27D17/00
CPCC21B3/06C21B3/08C21B2400/052C21B2400/08F27D17/004Y02W30/50
Inventor 王景甫杨梦圆
Owner BEIJING UNIV OF TECH