Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Boiler Types and Applications

There are four fundamental types of boiler available today—electric boilers, fire tube (shell or FT) boilers, water tube (WT) boilers, and nuclear reactor boilers. Electric boilers apart, all other types are essentially developments from shell and tube heat-exchanger designs. [Pg.23]

Each boiler type may be further classified according to design, output, pressure rating, and application, although not every type is available in all permutations. [Pg.23]

For most larger industrial applications around the world, either FT or WT boilers are generally employed. Design permutations are considerable, and many factories have both types installed, feeding into separate steam distribution systems (typically at different pressures) or a common steam header. A discussion on the various types of boilers follows  [Pg.24]


Boiler Types and Applications 2.3.1.3 Water Tube Exit Gas Section... [Pg.45]

Today a wide range of modem water treatment processes and programs are available that have been developed and perfected to suit the many different types and applications of boilers now operating. These include the many high-pressure (HP) units around the world, which tend to be operated within extremely strict (often knife edge ) control parameters. [Pg.3]

There are two basic types of watertube boilers assisted and natural circulation. Assisted circulation might apply where heat is from convection rather than a radiation source such as a waste heat application. Natural circulation is more suited where radiant heat and high gas temperatures are present. [Pg.353]

Characteristics of various atomizers are given in Table 24.1. Primary considerations are selecting the best principle for the type of fuel, the size of the burner/boiler and the type of application. Other important characteristics are ability to operate with the minimum of excess air, turndown ratio and questions of durability and maintenance. [Pg.376]

The first three boiler types may be variously used for commercial, institutional, or industrial applications. Fire tube boilers also may be used for steam turbine generator duty at lower electrical outputs, whereas only WT and nuclear reactor boilers are employed for utility power generation. [Pg.24]

NOTE Almost all types of commercial or industrial boilers, of whatever type, size, and application, must be provided with fully softened FW as an absolute minimum form of external water treatment. This requirement includes electrical resistance boilers. Probable exceptions to this rule are HW heating boilers and steam boilers operating at below 15 psig and receiving in excess of 95% returned condensate. [Pg.25]

All boiler operations utilize some form of basic chemical oxygen scavenging, and most larger facilities also employ mechanical deaeration prior to chemical polishing. Alternatives to these essentially independent techniques exist and have been steadily gaining in popularity for application in larger boiler plants and in other types of ultrapure water applications. [Pg.382]

Within this second group, the various types and designs of boiler operated are very broad and the classifications and applications of boiler water treatments are equally wide. [Pg.999]

This pump is the same in principle as the piston type but differs in that the gland is at one end of the cylinder making its replacement easier than with the standard piston type. The sealing of piston and ram pumps has been much improved but, because of the nature of the fluids frequently used, care in selecting and maintaining the seal is very important. The piston or ram pump may be used for injections of small quantities of inhibitors to polymerisation units or of corrosion inhibitors to high pressure systems, and also for boiler feed water applications. [Pg.318]

Firing the raw gas in boilers or heat applications such as kilns after removal of dust and particulates is the simplest application since the gas is kept hot and the tar problem is avoided. However, surprising enough, there are very few known successful applications, which have been operating in a commercial environment. This market is one where all types of gasifiers can compete and more concerted efforts have to be undertaken by the gasification industry to increase the number of successful cases. [Pg.11]

In the second type of application, the Tomlinson recovery boiler is replaced by a safer and thermally more efficient recovery system, in which the oil produced by thermal treatment is used as plant fuel. This type of process is, in many respects, similar to the Hydropyrolysis Recovery Process developed by the St. Regis Paper Company, USA ( ), the essential difference being the use of a reducing atmosphere in the YTT process. [Pg.105]

Based on fuel type, flue gas conditions, boiler type, NO removal requirements, new or retroflt application, cost and reliability, the SCR converter in a power plant can be located immediately after the boiler (and the economizer) (high dust arrangement, HD), after the removal of the particulate by the electrostatic precipitator and upstream of the APH Row dust arrangement, LD), and after the particulate collection and/or the removal of sulfur dioxide by a flue gas desulfurization (FGD) system (tail end arrangement, TE) (Figure 3). [Pg.1693]

The by-product stream can be divided into two types, according to their sites, the built-in form inside the catalyst bed and built-out form outside the catalyst bed. The built-in form is not to be used now because of its complicated structures and the low volumetric coefficient of the converter. The built-out form of by-product steam can be subdivided into three sorts Front-type, mid-type and back-type according to their sites in which the heat is recovered (shown in Fig. 9.23). In front-type boiler process, the reaction gas from the catalyst bed enters into waste heat boiler to recover the reaction heat, and then enters into the interchanger. It would produce high-pressure steam at 4 MPa-12.5 MPa. The mid-type waste heat boiler is located between the first and the second interchanger, the temperature of reaction gas is lower than that in front-type boiler, and can only produce steam at 0.9-1.6 MPa. The back-type boiler is applicable to outlet gas at low-temperatm-e of the converter. [Pg.768]

Malek, M. A. 2007. Heating Boiler Operator s Manual Maintenance, Operation, and Repair. New York McGraw-Hill. Unlike the Rayaprolu work (below) that addresses all types of boilers, this handbook by Malek focuses on boilers used specifically for heating applications. Various boiler types, fuel systems, and instrumentation and controls are covered. [Pg.413]

Steam-Generator Circulation System Circulation systems for utility application are generally classified as natural circulation and forced or pump-assisted circulation in drum-type boilers, and as once-through now in subcritical- and supercriticaf-pressure boilers. The... [Pg.2394]

Simple-cycle efficiency does not usually mean as much to process users as total-cycle efficiency, because the gas turbine is not usually economic in process applications without some type of heat recovery. Total-cycle efficiency is most important in any economic evaluation. In a cycle with heat recovery, the only major loss that is charged to the cycle is the heat exhausting from the boiler stack. With the good comes the bad. Gas turbine maintenance is generally somewhat higher in cost and should be included in the total evaluation. [Pg.295]

This is primarily engaged in analysis of boiler water treatment matters and involves on-site studies of various problems and the chemical examination of corrosion products, boiler scales, etc. It can also carry out certain types of metallurgical, fuel and inorganic analysis. Normal wet methods of analysis coupled with a visible ultraviolet and atomic absorption spectrophotometer are used for a wide range of analytical applications. Equipment in use by the engineering insurers providing these services can include an ion chromatograph, spectrometer equipment, atomic... [Pg.148]


See other pages where Boiler Types and Applications is mentioned: [Pg.23]    [Pg.25]    [Pg.27]    [Pg.29]    [Pg.31]    [Pg.33]    [Pg.35]    [Pg.37]    [Pg.39]    [Pg.41]    [Pg.43]    [Pg.47]    [Pg.49]    [Pg.51]    [Pg.53]    [Pg.55]    [Pg.57]    [Pg.59]    [Pg.61]    [Pg.63]    [Pg.65]    [Pg.801]    [Pg.23]    [Pg.25]    [Pg.27]    [Pg.29]    [Pg.31]    [Pg.33]    [Pg.35]    [Pg.37]    [Pg.39]    [Pg.41]    [Pg.43]    [Pg.47]    [Pg.49]    [Pg.51]    [Pg.53]    [Pg.55]    [Pg.57]    [Pg.59]    [Pg.61]    [Pg.63]    [Pg.65]    [Pg.801]    [Pg.610]    [Pg.990]    [Pg.160]    [Pg.330]    [Pg.436]    [Pg.923]    [Pg.302]    [Pg.372]    [Pg.613]   


SEARCH



Applications types

Boiler application

Boiler types

Types and Applications

© 2024 chempedia.info