b leaching drum filters of pulp plant

Contro Valve

The pressure inside the drum is lower than outside. When the drum rotates, liquor is sucked through the drum and deposit a layer of pulp on the wire. Wash liquor and, in the last stage, hot water is sprayed onto the drum. Filter washers may be arranged in series of three or four sta-ges. In the belt washer, unwashed pulp is diluted with wash ...

ANDRITZ pulp washing

The ANDRITZ GasFree Filter (aka GF-Filter) is an advanced vacuum drum filter washer. GF-Filter washers can be used for brownstock, post-oxygen, and bleach plant washing. Most typically, they are installed as a retrofit to an existing line, and can complement the washing process in special cases when only one stage of washing is required and the ...

How to Make Paper Pulp

How to Make Paper Pulp . Pulp is made from some plants, and plant fiber is the basic raw material of paper making. Generally speaking, plants used as pulping materials can be divided into four categories: stem fiber, phloem fiber, seed wool fiber and wood fiber. In particular, wood fibers are the most important.

Pulp Washing - Kadant

Multi-stage washing in one machine – Depending on the application, the Chemi-Washer can have up to ten cascading washing stages on a single machine. Low 1.0 dilution factor – Uses less wash water to produce higher dissolved solids for substantial steam cost savings in the evaporation plant. High-Efficiency Washing – Multi-stage displacement washing provides the highest efficiency in the ...

How Pulp Bleaching Works | Bleaching Paper Pulp – Mixer Direct

Jun 27, 2019· Pulp bleaching is meant to remove lignin, a natural element that causes paper to brown, from the wood pulp, thus brightening it. However, most lignin is removed earlier in the cooking stage. You cannot remove 100 percent of the lignin by cooking it without damaging the fibers, but, bleaching finished the delignification process begun during ...

Waste minimization in a bleach plant - ScienceDirect

Mar 01, 2004· The drum filter is used to remove the dissolved solids and unreacted chemicals from the pulp with wash water. In order to model the drum filter, different models can be used. In this study, Norden efficiency approach (Norden, 1966, Norden and Pekkanen, 1987) is used in order to model the drum filter. In the model, the Norden efficiency factor ...

Brown Stock Washing – A Review of the Literature, 2014 ...

When it is done well, increased black liquor solids, decreased carryover to the bleach plant and/or paper machine, and decreased environmental impacts result. Modern washing systems have been integrated into the heart of the kraft recovery cycle [10, 11]. Satisfactory pulp washing is achieved with a …

Paper and Pulp Complete Making Process

May 13, 2017· Washers The solubilized lignin is removed by washing the pulp, normally after each stage in the bleaching sequence. Such washing is particularly important when there is a change in pH. The same washing equipment as in the washing of cooked pulp can be used, e.g. drum filters, presses or so called "diffuser washers".

GL&V - Pulp and Paper Machinery, Equipment and Parts

GL&V serves the global pulp and paper industry with spare parts, rebuilds, upgrades, repairs and optimization services for new and existing equipment. Our group is focused on innovation and provides technologies that generate energy and cost savings for our customers.

A survey of control strategies in chemical pulp plants ...

Jul 01, 1977· A survey of the last development of control strategies in the chemical pulp industry is presented. It does not refer to the small local control loops but only reports the philosophy with which most of the control systems for the different parts of the pulping process are designed: cooking, bleaching, recovery systems.

Pulp and Paper Mills - LAKOS Filtration Solutions

Pulp and Paper Mill Filtration. LAKOS Separators are used throughout the pulp and paper production industry for their heavy solids load handling and no routine maintenance. Mills across the world use LAKOS for better performance and energy savings. Among the most common applications is removing sand and other solids from source water intake.

Pulp Bleaching Equipment - Convergence Training

Bleach plants can use vacuum drum washers, wash presses, compaction baffle filters, and drum displacement (DD) washers. What type of pump can be used for pumping pulp in the bleach plant? A centrifugal pump can be used for low consistency pulp and a modified centrifugal or a positive displacement pump can be used for medium consistency pulp.

The Pulp and Paper Making Processes - Princeton University

nin) by bleaching; and 4) paper formation and manufacture. A typical layout of a mill using the kraft chemical pulping process is shown in figure 2-1. Mechanical, semichemical, and sulfite pulp mills differ in detail, particularly in wood preparation, fiber separation, and bleaching…

PULP AND PAPER INDUSTRY

The CTF filter line is based on years of experience in the pulp and paper industry and offers solutions for almost all liquids. The self-cleaning and purging system is automated and requires a …

Pulp Washing - Valmet

They have a unique open-drum design, which provides many benefits compared to conventional drop-leg drum filters. Valmet's CORU-DEK model Vacuum Washers are ideal for all washing and thickening applications, including brown stock washing, pre/post O2 washing, pre-bleach and bleach washing, and screen room thickening or washing.

Bleaching Tower | Pulp Bleaching | AGICO Supplier

Bleaching tower is a kind of equipment used in pulp bleaching, which can be divided into low concentration type, medium concentration type and high concentration type. As a leading paper making equipment manufacturer, AGICO can provide you with relevant information in details.

Pulping and Papermaking of Non-Wood Fibers | IntechOpen

Jul 21, 2017· In general, the main raw materials of pulp and papermaking industry can be classified into three categories: wood, non-wood, and non-plant (mainly wastepaper), of which non-wood fiber material is an important fiber source in the areas where forest resources are scarce. Nowadays, in the total pulp consumption of the world, the proportions of wood pulp, wastepaper pulp, and non-wood pulp are 63 ...

Washing & Bleaching System for Paper paper pulper Machine

Bleaching principle is to mix bleach and size for chemical reaction, reaction products, residue bleach from the paper pulp washing out. Bleaching includes oxidative bleaching and reductive bleaching. Oxidizing bleaching is the process of oxidizing lignin and pigment in pulp …

Pulp and Paper Industry Wastewater and Water Treatment ...

Sedimentation, flotation, mixing, pulp separation and chemical recovery systems are among the myriad of process equipment WesTech supplies to the pulp and paper industry. Customized to the unique needs of operating plants, WesTech liquid/solids and liquid/liquid separation expertise is built upon years of working with plant operators and owners.

Latest Blogs about Pulp and Paper Industry | CNBM Paper Pulper

History of Paper Manufacturing Process Formed from wood pulp or plant fiber, the paper is chiefly used for written communication. The earliest paper was papyrus, made from reeds by the ancient Egyptians. Chinese paper was invented in the second century, probably by a Chinese court official named Cailun. His paper was made from tree barks

Technology & Equipment - Wenrui

Wenrui can provide complete solutions as well as singel machines and spareparts . Washing & Bleaching Equipments. Vacuum Drum Washer. Based on absorbing the most advanced technologies, WenRui independently developed the Fifth generation of vacuum drum washer, which has been awarded with the national patents No. ZL2008 2 0026182.X and No. ZL2008 2 0025982.0, and considered as …

8 Best Practices for Pumping Sodium Hypochlorite (Bleach)

Sodium hypochlorite (or bleach) is a key component in thousands of production and disinfection processes in a variety of industries. It can be used to disinfect drinking water, prevent the growth of algae and shellfish, control odors in water and wastewater treatment plants, and much more.

SECONDARY FIBER PREPARATION - DEINKING LINE

the pulp in one or two phases. Washing can be included in the thickening phase, where all or a portion of the filtrates are ejected from the system. If filtrates are returned to the system, they can be cleaned using screens or flotation. Disc filters, drum filters, gravity thickeners, gap washer thickeners, wire presses, screw presses, and

Paper Pulp Washing Process in Paper Pulping | Pulp Washing ...

Pulp washers use counter current flow between the stages such that the pulp moves in the opposite direction to the flow of washing waters. As a professional manufacturer of paper pulping machines, Anyang Machinery can produce different types of equipments for paper pulp washing process, such as vacuum drum washer, single screw press and twin ...

Chlorine Dioxide Generation and Use - Convergence Training

These crystals are pumped from the bottom of the generator to a rotary drum filter to remove water. Water is used on the filter to remove and recover reaction chemicals. The filtrate is returned to the generator, and sodium sulfate crystals are dissolved in hot water. The salt cake can then be used in the pulp mill recovery system.

Titanium Bleach Plant Fabrication | Titanium Fabrication Corp.

Titanium has become the material of choice to eliminate corrosion problems in bleach plants throughout North America. Solid titanium upflow and downflow tubes provide high reliability for chlorine dioxide bleaching stages compared to conventional acid brick lined steel or fiberglass.Titanium completely eliminates acid brick and grout failures and maintenance, and titanium eliminates fiberglass ...

Vacuum filter type CC — Unique open filter drum design

The filter is also frequently used in dewatering applications. Unique open filter drum design Pulp washing using vacuum for wash water displacement and dewatering is a highly proven washing technology. However, the CC-filter's unique open-drum design provides many benefits compared to conventional drop-leg drum filters.

Bleach Plant Equipment - Pulp and Paper Machinery ...

Bleach Plant Equipment includes, but is not limited to Chemical Mixers, Steam Mixers, Scrapers, Dischargers, Pumps, Circulators and Dilution Nozzles. These components are readily adaptable for repurposing in existing plants no matter what the bleach sequence currently is or will be in the future.

Achieving Efficient pulp washing - Pulp and Paper Canada

Pressure washing is similar to vacuum drum, but differs by spraying water under pressure through the pulp mat as the drum rotates. According to Towers, the compaction baffle (CB) filter is a popular washer based on this concept. "The CB filter is an extremely efficient washer and probably the most popular choice for new washing equipment.

Bleaching of Pulp By: Peter Hart, MeadWestvaco Corporation ...

Bleaching of Pulp By: Peter Hart, MeadWestvaco Corporation, and Alan W. Rudie, USDA Forest Service TABLE OF CONTENTS Chapter 1. Introduction 1.1 Previous Pulp Bleaching Books 1.2. Current Pulp Bleaching Book 1.3. Organization of the Current Book 1.4. References Cited Chapter 2. Oxygen Delignification 2.1 Introduction 2.1.1.

Continuous Sodium Hypochlorite Production (Bleach Plant)

The Powell Continuous Sodium Hypochlorite Process System is designed to manufacture sodium hypochlorite with greater efficiency and higher quality than previously obtainable with batch or continuous methods. The process, which uses liquid or vapor chlorine and caustic, is versatile and has the design capability of making any concentration of sodium hypochlorite solution from 2 trade percent up ...