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Centrifugal extraction phosphoric acid by solvent extraction refining industry

by:Deyuan      2020-08-23
Centrifugal extraction solvent extraction refining industrial phosphoric acid is a kind of wet phosphoric acid process of legal system, with yellow phosphorus as raw material to produce industrial phosphoric acid ( Commonly known as thermal process phosphoric acid) The technology of low energy consumption, saving investment, less pollution, especially in the aspect of reducing power consumption has great potential. At present, the domestic use of thermal process phosphoric acid process production 1 ton above 6000 KWH, electricity consumption of one ton of phosphoric acid and phosphoric acid by wet process production power consumption only need about 400 KWH, less than 7% of the traditional thermal process phosphoric acid process. Therefore, under the condition of the tense domestic electricity, the wet phosphoric acid purification technology instead of the thermal process phosphoric acid technology, the choice of domestic phosphate production enterprises.
traditional thermal process phosphoric acid production process is based on industrial yellow phosphorus as raw material, the combustion - Oxidation, hydration - After absorption process phosphoric acid, and the industrial yellow phosphorus is produced by the electric furnace process. This process is the power consumption, energy consumption per ton of P2O5 power consumption is 6303 KWH.
for energy saving and environmental protection into consideration, such as the system of yellow phosphorus phosphate enterprises of developed countries have been closed or turned to wet process. The implementation of the wet process technology in China started late. It is understood that in the wet phosphoric acid purification technology, solvent extraction has high purity obtained products, production process and equipment is relatively simple, low energy consumption, less raw material consumption, large production capacity, environmental pollution is small, and is advantageous to the comprehensive utilization of resources, etc, is the method of large-scale industrialization, so deeply phosphorus chemical enterprises push a pet.
at present, the solvent extraction of wet phosphoric acid purification technology has been successfully implemented in many enterprises and applications, and a lot of phosphorus chemical industry are also included in the respective strategic development planning. Mark the solvent extraction of refined phosphoric acid technology in China has achieved industrialization.
now used by refining industrial phosphoric acid by solvent extraction process, is based on the grade fertilizer production by wet process phosphoric acid ( Known as the original acid or green acid) In. cwl - M type centrifugal extraction purification purification machine, through extraction, washing, reverse extraction process, meet the technical index requirements of industrial grade phosphoric acid. The purified phosphoric acid by wet process energy consumption is much lower than thermal process phosphoric acid production process.
CWL - 550 series centrifugal extraction machine working principle:

weight two-phase mixing and mass transfer process solution according to certain proportion respectively from two feeding tube into the drum and shell type ring gap formed between the mixed zone, with the aid of the rotation of the drum, through the turbine disc and the impeller to make two phase mixing and dispersing quickly, two phase solution fully mass transfer. Complete mixing and mass transfer process. Two phase separation process

mixture under the action of vortex disk into the rotary drum, in the plate to form the bulkhead area, mixture quickly with synchronous rotary drum, in under the action of centrifugal force, the heavier than major phase fluid in the process of upward mobility and gradually away from the drum center on the drum wall; Small proportion of liquid phase gradually away from the drum wall and on to the center, after clarification of two phase fluid respectively through their weir plate into the collection chamber and the tube was closed to derivation, respectively, to complete two phase separation process.
CWL - Description of 550 series centrifugal extraction machine performance characteristics:
1. CWL - 550 series centrifugal extraction machine used in the extraction process of large enterprises, usually continuous counter-current multistage operation, can be designed and manufactured according to customer needs we will be able to drum diameter is 450 mm Any centrifugal extraction machine, 550 mm. cwl - The 550 series centrifugal extraction machine drum diameter is 550 mm.
2。 This device takes up the space is little, motor driven directly, no transmission attachments, compact structure, save area and operating space, less auxiliary equipment.
3。 Mainly used in the extraction process of large enterprises, the general applicable to flux - in 15000 Within the scope of the extraction process of 30000.
   4. The power to go running, the speed of up to 960 r/min, without the traditional process of the high tower transporting fluid, strong processing efficiency.
CWL - 550 series centrifugal extraction machine technical parameters:


CWL550 - N

CWL550 - M

drum diameter ( mm) 550


mixed flux ( m3 / h) 40000


speed ( r / min)

0 ~ 960

0 ~ 960

the separation factor 567


run power ( 千瓦)


4~7. 5


380 v 380 v

flow ratio scope for

1/30/1/30 ~

1/30/1/30 ~

suitable viscosity ( cps)

3000 or less

3000 or less

scope (difference in proportion between g/ml)

0. 03~3

0. 03 ~ 3
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