Specialty & Fine Chemical

Whatever the chemical processing requirements, Yokogawa has a solution that will ensure safety and efficiency at your plant.

Our solutions :

Batch Process Solutions

Specialty and fine chemicals are typically the product of batch processes. The production systems at such plants must flexibly be able to accommodate a wide range of products. With its ISA-88 based batch functionality, Yokogawa's comprehensive control solution, the CENTUM VP integrated production control system, matches up well with this requirement. For analysis of process and product quality, batch performance data must be stored in a readily accessible format. The  Exaquantum/Batch information management system also based on ISA-88, collects, saves, displays, and reports current and historical performance data on batch production, equipment, and recipes.

Utility Process Solutions

Chemical plants employ a variety of chemical processes in their production operations, and the monitoring of the toxic wastewater and gas components given off in these reactions is essential to ensuring a clean environment. Yokogawa offers a wide variety of monitoring and analysis solutions ranging from a spectrometer/gas mixture analyzer to an environment analyzer.

Solutions for All Processes

With all the flammable and explosive substances used in chemical plants, safety instrumented systems (SIS) are an absolute essential at such facilities. Yokogawa's ProSafe-RS SIS provides all the emergency shutdown system (ESD) and fire/gas ditection functionality called for in such applications. Also, our reliable and highly accurate field instruments play an essential role in ensuring safe and efficient plant operations.

Yokogawa has a wide range of products to assure proper monitoring of scrubbers, pH during batch neutralization, percent concentration with conductivity measurement, and  various other applications as a few are shown below. 

i.) Power plant boiler houses designed to burn coal or high sulfur oil are required by Federal and State pollution regulations to  scrub" (remove) sulfur dioxide from flue gasses to meet emission limits.  SO₂ in flue gasses is known to be harmful to the environment, as it is one contributor to the formation of acid rain.  pH control is critical for the proper functioning of the scrubber system.

ii.) There are numerous industrial applications where measurement and/or control of the specific chemical strength of the process is critical for optimizing the production of the end product.  These specific concentrations are obtained by mixing a full strength solution with water to achieve the desired percent concentration.  A flow-ratio control is used as a coarse control in this operation, and a controller in conjunction with a conductivity analyzer or transmitter serves as a trim control.

Conductivity measurement is a reliable indicator of the concentration of most acid or base solutions.  In determining the proper loop components for a particular application, the materials of construction will be of primary concern.  A Chemical Resistance Chart should be consulted, or an Application Data Sheet completed and sent to the factory in order to insure an installation that will be suited for the intended application.

iii.) Steam is used throughout the world as a means of producing energy. This steam is converted back to water in condensers and further cooled in Heat Exchangers. Where ever there is steam, there is a process liquid to be cooled. Since steam is used to produce energy, corrosion of the heat exchanger is a constant maintenance problem. The use of corrosion-resistant metals and improved methods of water treatment have minimized the effects of corrosion on the steam side of the heat exchanger, but corrosion on the process side remains a serious problem.  

Measurement and control of Heat Exchanger Leakage can help prevent costly maintenance, repair and downtime. The simple, essentially maintenance-free measurement of condensate conductivity will give the operator necessary information (or provide automatic control) to prevent sever damage to the boiler should a breakthrough of the heat exchanger occur.

CENTUM Batch Automation

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The CENTUM VP Distributed Control System (DCS) provides scalable and powerful solutions for continuous, batch and hybrid applications. CENTUM VP Batch is the ISA-88 (IEC-61512) batch control package, which provides recipe management and process management functions interfaced to the CENTUM VP DCS. CENTUM VP is unique in performing unit supervision functions in completely redundant real-time controllers offering an availability of 99.99999 percent, or "seven-9s". CENTUM Batch VP recipe management, scheduling and production information management functions can also be easily integrated into Manufacturing Operations Management (MOM/MES), supply chain and enterprise management systems to meet the increasing demands for leaner and more agile manufacturing operations.

CENTUM VP Batch offers flexible and scalable batch management software for centralized recipe and process management combined with distributed unit supervision. CENTUM VP Batch is field proven, having been used to automate a wide range of batch processes from simple, single product/single unit processes to flexible and complex multi-product/multi-path processes, with ease of use, outstanding reliability, and sophisticated functionality.

Using CENTUM VP Batch users benefit from:

• Reduced lifecycle engineering costs
• Shortened time to market
• Improved plant performance
• Reduction in unexpected control failures

Features of the CENTUM VP Batch System include:

Scalable and Reliable System Architecture

• Scalable Solution from Unit Control to Site Automation
• Highly Reliable Controllers
• Effortless Integration with Other Systems

Modular Engineering

• Hierarchical and Modular Configuration
• Object Oriented Phase Logic Structure
• Easy Testing Environment

Powerful and Advanced Unit Supervision

• User Configurable Unit State Matrices
• Plug-in Exception Handling and Monitoring Routines
• Support for Audit Trails, Electronic Records and Signatures

Easy Operation

• Intuitive View of Batch and Equipment Control
• Integration of Automated Control and Manual Operations
• FDA's 21 CFR Part 11 Support

Electronic Batch Records

• Flexible Batch Reporting
• Complete Batch Production Information Management System

Intelligent Solution Suite

• Recipe Management
• Production Planning and Scheduling
• Batch Production Information Management