A production process for co-producing aerated concrete blocks by utilizing waste heat of lime kiln tail gas

Abstract

The invention discloses a technology for producing aerated concrete blocks by means of lime kiln tail gas waste heat co-production. Out-of-kiln cooled lime of a lime kiln is directly conveyed to an aerated concrete block production line arranged on the lime kiln site in a matched mode, the lime and raw materials of the rest of aerated concrete blocks are made to be an aerated concrete block semi-finished products to be put into a still kettle of the production line, meanwhile, tail gas of the lime kiln is led into a heat exchanger, heat exchange is performed on cooling water in the heat exchanger and the lime kiln tail gas to form steam, the steam enters a steam generator, the steam is injected into the still kettle after temperature adjustment and pressure adjustment, autoclaved curing is performed on the aerated concrete block semi-finished products, and the lime kiln tail gas obtained after heat exchange with the cooling water of the heat exchanger enters a dust removal device of the lime kiln for dust removal and then is discharged. The lime kiln tail gas waste heat is utilized, the energy utilization rate of the lime kiln and the aerated concrete block production line is improved, lime produced by the lime kiln is used as the raw materials of the aerated concrete blocks, the production cost and energy consumption of the aerated concrete blocks are reduced, and the enterprise economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of recovery and utilization of waste heat from lime kiln tail gas, and in particular relates to a production process for co-producing aerated concrete blocks by using waste heat from lime kiln tail gas. Background technique [0002] Lime is an air-hardening inorganic gelling material with calcium oxide as the main component. It is made of products with high calcium carbonate content such as limestone, dolomite, chalk, and shells, and is calcined at 900 ° C to 1100 ° C. Lime is widely used in the construction material industry, such as lime milk paint and mortar, steam-cured fly ash bricks, blocks, autoclaved lime-sand bricks, etc. [0003] Lime is generally obtained by calcination of limestone in a lime kiln, which decomposes at high temperature into quicklime and carbon dioxide. Lime kiln is mainly composed of kiln body, feeding device, material distributing device, combustion device, ash unloading device,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a production process for co-producing aerated concrete blocks by utilizing the waste heat of lime kiln tail gas, which can improve energy utilization efficiency, reduce product cost and improve economic benefits of the enterprise, and solve the problem of insufficient comprehensive utilization of waste heat of lime kiln tail gas

Images