Cooking

Chemical and Pulping Ltd

Cooking

This page describes the CPL proprietary cooking systems.

CPL offers two families of Kraft batch cooking systems

The Digester Steam Saver system (DSS - Patent Pending) is designed for steam savings. The Displacement Digester System (DDS - Patent Pending) is designed for a higher steam saving than the DSS as well as adding chemical benefits for low kappa high strength fiber (extended delignification). The following table is a summary of the systems offered and is organized:

	From the top to the bottom in increasing capital investment
	From the top to the bottom in decreasing operational costs
	From the top to the bottom in additional equipment indicating that any systems can be upgraded at a future date (that is, all equipment is utilized from one to the next advanced)

Table of Cooking Systems Comparisons

Product	Steam Consumption	Washing in Digester	Cooking Chemistry
D S S F a m i l y
DSS Type R	1.4 mton/odmt pulp		conventional kraft
DSS Type D	1.1 mton/odmt pulp	one vacuum washer	conventional kraft
D D S F a m i l y
DDS Model P	0.65 mton/odmt pulp	one vacuum washer	kraft extended delignification
DDS Model G	0.55 mton/odmt pulp	one vacuum washer	kraft extended delignification

DDS - Displacement Digesting Systems (Patent Pending)

We supply Displacement Digester cooking systems for hardwood, tropical hardwood, softwood and bamboo. The Displacement Digester System (DDS) is based on the Beloit RDH process and is proven using bamboo as a furnish. These systems reuse the spent cooking liquor to impart chemical benefits to the pulp which allows for low kappa cooking while maintaining high pulp strength. The energy recovery phase of the cooking cycle is equivalent to one vacuum washer stage of solids removal.

DSS - Digester Steam Saver Systems (Patent Pending)

We supply kraft conventional batch digester cooking systems for hardwood, tropical hardwood, softwood and bamboo. The DSS is designed to save energy at a low cost. This system does not offer the beneficial chemical effects of a true displacement digester system such as CPL's DDS. The Type D system has an energy recovery phase in the cooking cycle which is equivalent to one vacuum washer stage of solids removal.

Please Visit CabTec International llc for patent listings

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