TABLE OF CONTENTS
Trichlorosilane and pcs production technology
Giprosintez’ experience
Forecasted dynamics of world pcs production
PCS production technology
Scope of work for PCS
Giprosintez' solutions for turnkey PCS plants
Customer guarantees
TRICHLOROSILANE AND PCS PRODUCTION TECHNOLOGY
Giprosintez' engineering solutions for PCS and TCS production are based on long-term experience in design and engineering support of all silicon-related production facilities in Russia and the CIS. The solutions summarize the institute's experience, proprietary developments and know-how as well as the best engineering solutions used by global polysilicon leaders.
The process and equipment guarantee required capacity, safe operation, competitiveness, and highest reliability, availability & maintainability figures for the new production facilities.
GIPROSINTEZ’ EXPERIENCE
Year
|
Enterprise
|
Production
|
Materials, design stage
|
|
2009
|
OOO Usol'ye-Sibirskoye Silicon
|
PCS
|
Detailed design
|
|
2008
|
OOO Usol'ye-Sibirskoye Silicon
|
TCS
|
Detailed design for plant expansion
|
|
2006
|
OAO Khimprom, Novocheboksarsk
|
TCS and PCS
|
Feasibility study
|
|
2004
|
Polysilicon Plant, Laeshan, China
|
TCS
|
Detailed design, technology and production automation
|
|
2003
|
Polysilicon Plant, Laeshan, China
|
TCS
|
Basic design, technology and production automation
|
|
2002
|
Polysilicon Plant, Laeshan, China
|
TCS
|
Non-standardized equipment design
|
|
2001
|
OAO Khimprom, Novocheboksarsk
|
TCS
|
Detailed design for reconstruction
|
|
2001
|
OAO Khimprom, Novocheboksarsk
|
PCS
|
Feasibility study
|
|
2000
|
OAO Khimprom, Novocheboksarsk
|
TCS
|
Detailed design for rectification stage reconstruction
|
|
1992
|
OAO Podolsky KhMZ
|
TCS
|
Detailed design for TCS rectification and waste processing stages
|
|
1989
|
OAO Podolsky KhMZ
|
Monosilane
|
Process concepts for design revision
|
|
1986
|
OAO Kremnitpolimer, Zaporozhye
|
Monosilane and PCS
|
Process and production automation
|
FORECASTED DYNAMICS OF WORLD PCS PRODUCTION
Forecasted dynamics of world solar cells production
Forecasted PCS production through 2015 according to declared plans
PCS PRODUCTION TECHNOLOGY
Polycrystalline silicon production is a multipurpose complex comprising various plants with equipment and capacity depending upon selected technology and end product quality.
Synthesis of chlorosilanes is done by TG silicon hydrochlorination in fluidized-bed reactor as follows:
Si + 3HCl = SiHCl3 + H2
The structure of the reactor along with process procedures allow to use up to 98-99% HCl with 90% TCS output.
Vapor-gas mixture purification
to remove suspended solids (silicon powder, solid metal chlorides, polysilane-chlorides) using cyclones, filters and “wet” methods.
Chlorosilanes condensation using heat exchangers running under low temperature. Vent gases are compressed and recycled after separation and purification.
Chlorosilanes are separated by rectification method. Chlorosilane mixture is separated into trichlorosilane to be routed to hydrogen deposition of polysilicon, and silicon tetrachloride to be hydrogen-reduced to trichlorosilane.
Polysilicon is produced by reduction of trichlorosilane (chemical vapor deposition (CVD)).
The following main reactions take place when silicon is recovered from TCS and deposited:
SiHCl3 + H2 = Si + SiCl4 + 2HCl
4SiHCl3 = Si + 3SiCl4 + 2H2
Chlorosilanes are condensed
from the vapor-gas mixture at low temperatures by means of vent gas recovery system. Reduced chlorosilanes are separated into recovered hydrogen chloride and recovered silanes that are re-used in the process.
SCOPE OF WORK FOR PCS
GIPROSINTEZ' SOLUTIONS FOR TURNKEY PCS PLANTS
TCS Synthesis, Purification and Condensation Building, Silicon Storage and Milling
TCS and STC Rectification Building. Purified TCS Generation
PCS Production and STC Conversion Building with Water Treatment Unit
PCS Production and STC Conversion Building with Water Treatment Unit
Hydrogen Treatment and Compression, Waste Recovery and Offgas Treatment Building, External Recovered Silanes Rectification Block
Hydrogen Treatment and Compression, Waste Recovery and Offgas Treatment Building, External Recovered Silanes Rectification Block
Water Circulation Pump Station with Cooling Towers
Ammonia Refrigeration Station
Main buildings of new PCS production
CUSTOMER GUARANTEES
Giprosintez guarantees its clients:
- projects developed on the basis of up-to-date technical and technological achievements, advanced innovative solutions;
- best technical and financial indices of the facilities to be designed;
- high reliability and safety of the facilities to be designed;
- ecological safety of the facilities to be designed.
