The utility model discloses a treatment device for reducing
hardness and TDS (
total dissolved solids) in
coal gasification circulating water, which comprises two support plates, one side surfaces, close to each other, of the two support plates are jointly and fixedly connected with a fine filter box, and one side surfaces, close to each other, of the two support plates are jointly and fixedly connected with a chemical
softening reaction box. According to the device, the
rotational flow plate and the lamination are arranged, water tangentially enters through the
rotational flow plate and flows through the lamination filter, the
pore diameter of the lamination filter is gradually reduced by 100 microns to 50 microns to 10 microns, fine
suspended solids are further intercepted, and the fine
suspended solids can be removed; then the water flows through a
vortex mixer, and water
hardness is reduced by means of chemical spraying (Na2CO3 / PAC) and inclined tube
precipitation and
filtration and removal of part of Ca < 2 + > and Mg < 2 + >; and finally, through an
activated carbon layer (
organic matter adsorption), a
zeolite layer (micron particle interception) and
chelating resin Ca < 2 + > / Mg < 2 + > adsorption, the
hardness and TDS of water are effectively improved, so that the long-period stable operation of the
coal gasification device is ensured.