Energy-saving heating device for surface treatment of nano calcium carbonate cured slurry

Abstract

The invention discloses an energy-saving heating device for surface treatment of nano calcium carbonate cured slurry and relates to the technical field of slurry heating devices. The device comprisesa carbonization tank, a homogenization tank, a plate-type heat exchanger, an activation kettle and a buffer tank; a slurry outlet pump of the homogenization tank is connected with a cured slurry feeding pipeline of the plate-type heat exchanger, a cured slurry discharging pipeline of the plate-type heat exchanger is connected with an activated feeding pipeline of the activation kettle, and a steamsilencing heater is arranged in the activation kettle. The steam silencing heater comprises a heater cavity which is uniformly provided with a plurality of steam spray holes, an activation kettle slurry outlet pump is connected with an activated slurry feeding pipeline of the plate-type heat exchanger, and an activated slurry discharging pipeline of the plate-type heat exchanger is connected witha buffer feeding pipeline of the buffer tank. According to the device, cured slurry and activated slurry are firstly subjected to heat exchange by the plate-type heat exchanger and then further heated by the steam silencing heater to raise the activation temperature, so that the production cost is reduced, and the purposes of energy conservation, emission reduction and energy recycling are achieved.

Description

technical field [0001] The invention relates to the technical field of slurry heating devices, in particular to an energy-saving heating device for surface treatment of cooked nano-calcium carbonate pulp. Background technique [0002] The production of nano-calcium carbonate is usually obtained by calcining limestone to obtain lime, which is digested with water, refined and sieved to obtain lime raw slurry (Ca(OH) 2 ), adjust the lime slurry (Ca(OH) 2 ) temperature, concentration, and adding a crystal form control agent, and then using the kiln gas carbonization method to obtain nano-calcium carbonate cooked pulp (CaCO 3 ), the temperature of the obtained nano-calcium carbonate cooked pulp is usually between 25-50 °C. Since the surface treatment agent has a better coating effect under high temperature conditions, it is usually necessary to heat the cooked nano-calcium carbonate slurry to 75-95°C, then add the dissolved saponified stearate and other surface treatment agents...

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Problems solved by technology

[0004] According to the technical defects existing in the prior art, the technical problem to be solved by the present invention is to provide an energy-saving heating device for surface treatment of nano-calcium carbonate cooked pulp, so that the cooked pulp and the activated pulp are first exchanged through a plate heat exchanger.

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