DP "Suntrade", Prosyansky branch (Bunge)
Comprehensive modernization of grain dryer chipboard 32x2.
Primary goal:
- Management of grain transportation routes.
- Control of grain drying process modes.
- Control of the grain drying process and their parameters.
Scope of work:
- Development of design documentation for an automatic control system.
- Complete set of controls.
- Manufacturing of power and control cabinets.
- Dismantling of old electrical power equipment.
- Installation of automation equipment.
- Development of algorithmic support.
- Software development.
- Commissioning works.
Technical means:
- Power supply cabinet.
- Starting and protective equipment cabinets.
- Control system cabinet.
All electrical switching equipment is housed in cabinets made of 1.5 mm thick steel coated with a polymer powder coating with preliminary phosphating. The boards are certified according to the international standard ISO 9001:2000 PRA 000 3966 dated December 1, 2005. The degree of protection of the cabinets is IP55.
The power distribution circuits are made on the basis of Moeller equipment, the main advantage of which is a high degree of time between failures, fire resistance (class V2 in accordance with UL94 according to IEC 695-2-2), vibration resistance, and dust resistance.
In control cabinets and push-button stations installed at the equipment site, controls (buttons, switches) in IP65 version are used.
On the front panels of the starting and protective equipment cabinets there are equipment control and monitoring controls: “M/O/A” operating mode switches, ammeters for 4 fans and 2 elevators.
On the front panel of the control system cabinet there are controls for the operation of the grain dryer DSP32x2, with the help of which the operator conducts the technological process: Selecting a route, Starting a route, Stopping a route. The control process is visualized on a diagram located in the upper part of the control cabinet.
The automatic control system is implemented on the basis of a programmable controller Simatic S7-1200 consisting of:
- CPU: CPU 1214C AC/DC/Relay.
- 24V DC digital signal input module: SM 1221 DI 16x24VDC.
- Digital input/output module: SM 1223 DI 16x24 VDC, DQ16x24 VDC.
The automatic control system controls:
- Condition of the mechanisms: 6 fans, 2 conveyors and 2 elevators.
- Speed and rise of the elevator belt.
- Product level in the ultra-drying hopper.
- Burner operating status.
- The operation of the unloading gates is controlled using the PKTP-SZ Eldorado grain drying temperature parameters control devices used in the previous project.
Result:
Thanks to the implementation of this project, optimal modes of bringing the product to the required storage parameters, fire-safe drying of grains with minimized energy costs with minimal human intervention were provided.
Customer comment
Implementation period:
August 2010