Crystallizer

CR SERIES

The CR crystallization unit is used to purify acid or alkaline galvanic process baths with the separation of polluting salts by cooling and subsequent filtration or equally to recover purified process salts from concentrated solutions containing degraded additives. The treatment can be continuous, discontinuous or batch; the solution to be treated is loaded into the crystalliser body, is cooled to a pre-established temperature according to the process, then discharged into a filtering section where the solution is drained and sent back to the working bath; the salts can be filtered in a removable big-bag filter, in a water dissolver with discharge in purification in a draining tank with automatic discharge of the salts, or, on request, in a centrifugal separator.

The most frequent fields of application are:

  • cyanoalkali baths of cadmium, zinc, brass, copper, nickel, silver;
  • degreasing baths, burnishing;
  • sulfuric pickling baths;
  • heat treatment baths.

Depending on the fields of application, the potential required, our models follow this pattern:

CR SERIES
HP = heat pump with R407C fluid
GL = glycol water
S = with immersed exchanger
R = with scraper

CAPACITY = from 6 to 30 to KW of cooling capacity from 1,200 to 10,000 litres/day
MATERIALS = the materials used for the construction depend on the type of process treated. The following are commonly used: AISI 304L and 316L steel, Titanium, epoxy and bisphenolic PFRV.

UNIT DESCRIPTION

Continuous cycle four-body crystallizer for acid solutions with glycol water cooling. The acid solution is loaded directly into the crystallizer; cooled by circulation of glycol water in the jacket exchanger. This process produces precipitation of salts which are discharged by means of a pneumatic valve into the collection tank with continuous discharge auger into the centrifuge. The separated solution is discharged by means of a pump while the salts are discharged into special collection big-bags. A control panel equipped with PLC provides for the automatic management of the operation of the system. The unit is equipped with level controls that govern the fill and drain pneumatic valves and the draining pump.

DATA SHEET

  • Crystallized solution potential m3/d max 38.4
  • Flow rate of crystallized salts max ton/d 4.8
  • Cooling power per ton of crystal solution. Mcal/ton 284
  • Solution inlet temperature 55-60 ° C
  • Crystallization temperature ° C +8
  • Total capacity of the crystallizers m3 7.2
  • Installed electric power KW 2
  • Compressed air consumption 6 bar Nm3/h 1
  • Voltage / frequency VAC/Hz 400 /50
  • Overall dimensions approx m 3 x 3 x 4,7H
  • Approx. empty plant weight ton 2.8

WARRANTY 12 (Twelve) months from the delivery date;

CRYSTALLIZER PICKLING WHEEL DRAWING MOD. 4CR400GL

UNIT DESCRIPTION

The unit concerns a plant made up of two systems of concentration, crystallization, and centrifugal filtration. The concentration unit consists of an evaporator body in Vr and graphite exchangers. The vacuum is created by an ejector-pump system. The feeding of the diluted product and the discharge of the distillate take place continuously, while the concentrate is discharged discontinuously, by means of a pump, at density. The distilled and condensed acid is relaunched to the utilities. The crystallization unit consists of a continuous cycle crystallizer for acid solutions with cooling by means of a glycol water refrigeration circuit. The insolubilised salts are discontinuously discharged by means of a pneumatic valve into the bag centrifuge; the drained solution is sent back to the users by means of a pump. The salts are extracted manually using a hoist and collected in big bags. A control panel equipped with PLC provides for automatic management.

DATA SHEET

  • Evaporated hydrochloric acid potential* kg/h 400
  • Steam flow rate 0.5 bar ( 105 °C ) kg/h 530
  • Cooling water flow (30-35°C) m3/h 70
  • Feed solution flow rate kg/h 350
  • Fe concentration at the inlet c.ca % w/w 10
  • Concentrated exhaust concentration approx % w/w 15
  • Hourly flow rate of crystal solution. kg/h 140
  • Hourly flow rate of FeSO4.7H2O kg/h 110
  • Refrigerator power (expansion at 0°C) KWt 50
  • Solution inlet temperature 50 °C
  • Crystallization temperature 20 °C
  • Total capacity of the crystallizers m3 14
  • Installed electric power KW 35
  • Instrument air consumption Nm3/h 2
  • Voltage / frequency VAC/Hz 400 /50
  • Crystallized solution potential m3/d max 38.4

CRYSTALLIZER PICKLING CHLOHYDRIC GALVANIZING MOD. AE400 SCN + CR1000GLS

Alkaline bath decarbonation plant-MOD CR100 HPR