Lightweight aggregate calcining device

By combining segmented heating furnace body and waste heat circulation module, the problems of high energy consumption and uneven product in lightweight aggregate calcination device are solved, realizing efficient and energy-saving lightweight aggregate production.

CN224202162UActive Publication Date: 2026-05-05HEBEI WATER SCI ENG TECH SERVICE CO LTD
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Patent Information

Application Number
CN202520558483.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-27
Publication Date
2026-05-05
Estimated Expiration
2035-03-27

AI Technical Summary

Technical Problem

Traditional lightweight aggregate calcination equipment suffers from high energy consumption, uneven product density and strength, and lacks consideration for multi-stage gradient heating based on the characteristics of lightweight aggregates, resulting in low thermal efficiency and unstable product performance.

Method used

The furnace body is segmented, including a preheating section, a main calcination section and a slow cooling section. It combines electric heating and burner heating, and achieves multi-stage gradient heating through heat insulation components and waste heat circulation modules to avoid over-burning or under-burning, and uses waste heat to generate steam to reduce energy consumption.

Benefits of technology

This achieves uniformity in the density and compressive strength of lightweight aggregates, improves thermal efficiency and product performance stability, and reduces production costs.

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Abstract

The utility model provides a lightweight aggregate calcining device. The lightweight aggregate calcining device comprises a segmented heating furnace body, a waste heat circulating module, a spiral conveyor and a cooling module, the segmented heating furnace body is divided into a preheating section, a main calcining section and a slow cooling section which are connected in sequence through a heat insulation assembly. The preheating section is provided with an electric heating part, the main calcining section is provided with a combustor, and the slow cooling section is provided with a cooling part. The upper portion of the kiln head is communicated with an outlet of the raw material pretreatment device, and a ventilation opening is formed in the lower portion of the kiln head. The kiln tail is connected with an inlet of the screw conveyor, and the screw conveyor is used for conveying the calcined lightweight aggregate to the cooling module for cooling and shaping. The waste heat circulation module comprises a first circulation pipeline arranged between the two heat insulation assemblies and a second circulation pipeline arranged between the slow cooling section and the ventilation opening. According to the utility model, multi-section gradient heating is adopted, so that local over-burning or under-burning is avoided. Heat insulation of all the sections is achieved, high-precision temperature control is achieved, and the stability of the partition temperature and the uniformity of gradient distribution are ensured.
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