Gangue brick production system and production process for drying sludge by using waste heat of brick kiln

Abstract

The invention discloses a gangue brick production system and production process for drying sludge by using waste heat of a brick kiln. The gangue brick production system comprises a waste heat boiler, an absorption heat pump, a hot water tank, a sludge drying machine, a water treatment device, a cooling tower, a plate heat exchanger and a cold water tank. One end of the waste heat boiler is connected with the brick kiln. The other end of the waste heat boiler is connected with the absorption heat pump, the absorption heat pump is connected with the hot water tank through a water pump, the sludge drying machine is connected with the absorption heat pump and the water treatment device, and the other water inlet end of the plate heat exchanger is connected with the cold water tank. The water outlet end of the plate heat exchanger is separately connected with the cooling tower and the sludge drying machine. According to the gangue brick production system for drying the sludge by using the waste heat of the brick kiln, flue gas subjected to heat exchange is conveyed back to a drying kiln to preheat green bricks, so that heat energy waste and heat source pollution are avoided, comprehensive utilization of the waste heat of the flue gas of the brick kiln is effectively improved, and heat energy requirements and waste heat utilization in a production process are met.

Description

technical field [0001] The invention belongs to the technical field of gangue brick production, and in particular relates to a gangue brick production system which utilizes brick kiln waste heat to dry sludge. The invention also relates to a production process of a gangue brick production system which utilizes waste heat of a brick kiln to dry sludge. Background technique [0002] The main component of gangue bricks is gangue. Coal gangue is solid waste discharged during the coal mining process and coal washing process. Its main components are Al2O3 and SiO2, and it also contains varying amounts of Fe2O3, MgO, Na2O, K2O, P2O5, SO3 and trace rare elements. The production cost of using coal gangue to produce coal gangue bricks is lower than that of ordinary clay bricks. Using coal gangue to make bricks not only saves land, but also consumes waste from mines. It is a low-carbon building material that is conducive to environmental protection. [0003] The tunnel kiln uses coal...

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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the above deficiencies, the purpose of the present invention is to provide a gangue brick production system that uses the waste heat of brick kilns to dry sludge, which solves the problem of using waste heat in flue gas in the prior art, which cannot make full use of energy and is easy to produce The waste of resources, and the gas discharged from the chimney will also carry a lot of smoke and dust, which will easily affect the surrounding environment

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