STEAM GENERATOR BOILER
               Customized Steam Boilers - Made to Your Demands

 



 



QUICK ENTRANCE :
 
Type DT & DTM
Steam Capacities 70 - 2,000 kg/hour
Working Pressures 3 - 190 bar gauge
Energy Source
(Fuel)		 Natural gas, LPG, bio-gas,
light and heavy fuel oil,
- and combinations hereof.
Utilisation of Energy

(depends on working loads and steam pressures. Designs for ultra high efficiencies on request)		 Efficiencies (based on LCV) :

90 - 92% (basis boiler design)
95 - 97% (when using an economizer i.e. extra flue gas cooling e.g. for water heating)
The Product General Description
Design Sketch Horizontal & Vertical
Data & Dimensions Tables
Steam System Diagram
Chimney Design & Lay-out
Flue Gas Data Data & Calculations
Special Optional
Features		 Mobile Steam (skid/container/trailer)
High Pressures (high temperatures)
Clean Steam (sanitary steam)
 Economisers (flue gas heat recovery)
Alternative Types Electric Boilers  |  Other Boilers
Steam table

Steam Generator Boilers in Strong & Reliable Design


AB&CO · TT BOILERS are a well-known Danish steam boiler manufacturer, who have specialized in small and medium-sized industrial boilers in individual designs as complete units - including container solutions.

TT BOILERS Steam Generator Boilers types DT & DTM are all tailor-made  industrial steam boilers for small steam capacities. The special compact water-tube design gives a small internal steam/water compartment. It means fast start-up, only modest heat losses during hot stand-by (idle) and it is completely safe to operate (no risks for steam explosions). Even though the investment in this type is thus somewhat higher than the cheapest alternatives on the market, the quality and the special technical features means that the long term costs are still much lower.
 

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DETAILED DESCRIPTION & SPECIFICATIONS
 
 
Easy & Safe to Operate
- normally very few or no requirement  on installation, start-up an operation from national authorities (depending on actual state law and regulation).
Rapid Start-Up
- from cold condition, which also means no energy consumption when no steam output.
Compact
- no large water volume thus small outer dimension. Easy to fit in almost everywhere
Horizontal or Vertical Design ?
- even more flexible to fit into an existing arrangement. Choose between the horizontal /vertical design.
Environmental & Customised Design
- Efficiency means low fuel consumption,  low CO2 emission and low NOx emission. Thus this gives low operational cost and an environmental (green) profile. A customized design gives different options in this aspect - depending on the investment.
Heavy Duty Design
- Rigid design and constructed to withstand extreme pressure and temperatures - up to 350°C and 190 barg on request (as delivered for a test bench for safety valves for nuclear submarine)
Price Attractive
- both in purchase, but especially in operation. Particular supreme economy at small operation times with periods with no or low steam rates.
Approved & Proven  
 - by the most demanding customers and authorities worldwide. The basic design is 'battle proved' - the first units was put into service by TT BOILERS in the 70ties.

Special Optional Features
   >  Clean Steam and Pure Steam
   >  Ultra High Pressure Steam
   >  Portable / Mobile Package Solutions


INTRODUCTION

 TT BOILERS steam generator boilers type DT are industrial steam boilers with small and medium sized steam outputs.

They are developed and designed especially for reliability even during "heavy duty" operations - with no compromise on quality even though it mean higher purchase price. The focus is dedicated to ensure the best long term investment with lowest operational costs during the longest lifetime.

The pressure parts are designed as standard up to 40 bar pressure although operation pressure might between 3 - 10 bar (gauge). Pressure of 190°C and design temperature of 350°C on request.

This industrial type steam generator is also known as the steam generator boiler. It operates as a forced circulation water tube boiler. Unlike the conventional fire-tube steam boiler (fire/smoke tube boiler), the water in the steam generator boiler contains a very small amount of water and steam (equal the volume inside the pressure vessel i.e. inside the tube).

As listed up in the left column, this gives quite a few advantages.

The TT BOILERS steam generator boilers are delivered in the range from 100 to 2,000 kg/h steam at design pressure going from 3 barg and all the way up to 190 barg (for special applications). These complete units are easy to install and does not require any special foundation; they can be place directly on a concrete floor.

The advantages are numerous - just image what you gain with a start-up time down to few minutes !

Get here a fast overview how to Choose your Boiler Type - the classic fire-tube type or this compact water-tube type.
 

 

Steam Troll.JPG (23704 bytes)

Steam Generator - Vertical type

 

 

HIGH EFFICIENCY - LOW CO2 EMISSION

Type DT generally offers very high efficiencies equal low fuel consumption and low CO2 emission.

But special request on extra high efficiencies and extra low CO2 emission can be offered as a part of our general customized solution features. It costs a little more, but the overall cost are normally lower - and the environmental issue should also been taken into account.

Additional efficiency can be obtained by using an economizer (optional extra).

 



LOW NOx

The steam generators are prepared with combustion chambers for ensuring Low NOx when choosing an appropriate Low NOx burner. This design also offer high efficiencies. More green solution, often a request. The long term extra costs are very often modest due to the higher efficiency.

NOTE! Without a suitable combustion chamber design, no Low NOx burner can ensure  environmental values with regard to NOx emissions - the boiler design is essential to ensure Low NOx.
 



 

EXTENT OF DELIVERY

DT steam generators can be delivered in horizontal execution (with low height), or in vertical execution (occupying limited floor space). They are delivered insulated with stainless steel cover sheets and complete with burner, armatures, instrumentation, safeties and a control panel - and with full documentation including necessary certificates.

All DT steam generators are carefully checked, controlled and function tested prior to dispatch from the workshop.

CONSTRUCTION

The steam generators heaters are made with coils made of seamless tubes, where the feed water is preheated and evaporated during the flow through these. The heat is transferred to the water/steam mixture as radiant heat in the combustion chamber, where the inner cylindrical tube coil and a flat tube coil forms the chamber wall and the bottom respectively. Consequently refractory concrete is avoided. The combustion gasses are hereafter cooled in the outer convection part, as the gasses pass the space between the two tube coils. The thermal design ensures a modest volume of steam relative to the size of the heater, and allows unlimited thermal expansion due to the high temperatures. All TT BOILERS steam generators and steam boilers are designed and equipped according to German TRD boiler regulations and Danish boiler regulations and corresponding EN-norms.

DT steam generators are made in carbon steel, but also different grades of stainless steel.

 

Stor_Coil_2_Cut.jpg (23562 bytes)

 Making the Steam Generators





SPECIAL DESIGNS

Beside the standard execution the DT steam generators can be delivered in e.g. following variations:


 


  
More info about
  the 'Boiler Works'



BURNERS

As standard the heaters are provided by international recognized and only high quality burner brands - for natural gas, light fuel oil, heavy fuel oil and combinations (dual fuel). This include Low NOx burner designs. Demands for special burner designs can be fulfilled and adapted in the heater design.





STEAM GENERATORS
OR STEAM BOILERS ? 

There are indeed some major differences between a steam generator and a classic 3-pass fire-tube steam boiler.

Advantages and disadvantages are present depending on the actual circumstances.

Read more about different type of steam boilers and about making the right choice on selecting the correct type of steam boiler. TT BOILERS manufacture both types and have no preferences in advising in favour of either type.

 

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PRODUCTION OF CLEAN STEAM

TT BOILERS steam generators are also delivered for production of clean steam for food industry, pharmaceutical industry, electronically industry etc.

               
oil/gas-fired clean steam generator     Tube coil of a clean steam generator                                   steam generator with reboilers for pure steam

Sanitary steam (clean steam) for food applications are provided by a steam generator made in high grade stainless steel. The photo above shows a unit  for Rolls Royce in UK which should also have other special features such as steam of  190 barg / 350°C. See more details here about clean steam.

 

For pharmaceutical industry a special grade of high quality sterile steam is used -  so-called pure steam. The photo above shows steam generators with capacity of 300 kg/h and 600 kg/h - with reboiler, grinded and polished internally. See more details here about clean steam..

sketch
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   Steam Generator - Low NOx
 

Type

Horizontal type only

Steam
Production
[kg/h]

Heat
Capacity
[kW]

 Oil · Gas
Consumption
[kg/h · Nm³/h]

A **
[mm]

B

[mm]

C
*
[mm]

D

[mm]

E **
[mm]

F

[mm]

Weight
Empty
[kg]

Weight
Full[kg]

   DTM 125

 125 87 8,5 · 9 1700 1300 800 700 800 Ø150 150 175

  *    Measurement including control panel , which can be placed anywhere or delivered separately.
  **  Measurement adjusted with respect to nozzles (inlet feed water, outlet steam) which are located at the front.
 

Type

Steam
Production
[kg/h]

Heat
Capacity
[kW]

 Oil · Gas
Consumption
[kg/h · Nm³/h]

A
[mm]

B
[mm]

C
[mm]

D
[mm]

E
[mm]

F
[mm]

Weight
 Empty[kg]

Weight
Full[kg]
   DT 300/100 100 67 7 · 7 1,800 1,400 1,400 1,000 1,500 ø210 440 460
   DT 300/150 150 100 10 · 10 1,900 1,400 1,400 1,000 1,500 ø210 445 465
   DT 300/300 300 200 20 · 21 2,000 1,400 1,400 1,000 1,500 ø210 450 470
   DT 300/400 400 266 26 · 28 2,100 1,400 1,400 1,000 1,500 ø210 455 475
   DT 600/700 700 466 46 · 49 2,550 1,850 1,500 1,100 1,500 ø250 600 650
   DT 1000/800 800 533 52 · 56 2,900 2,400 1,600 1,200 1,800 ø350 1,285 1,385
   DT 1000/1000 1,000 666 65 · 70 3,100 2,400 1,600 1,200 1,800 ø350 1,300 1,400
   DT 1000/1200 1,200 800 78 · 84 3,300 2,400 1,600 1,200 1,800 ø350 1,325 1,425
   DT 1500 1,500 1,000 98 · 105 On request
   DT 2000 2,000 1,333 130 · 139


TABLE VALUES · Presumptions: 
The below stated values for heat capacity and fuel consumptions are based on 80°C feed water temperature, 7 bar steam pressure, 90% efficiency and normal European quality light fuel oil (LCV=42 MJ/kg) and natural gas (LCV=40 MJ/Nm³)

 

CUSTOMIZED DESIGN
Note that special designs can be offered - adapted to the actual circumstances. Capacities, sizes, efficiencies, burner types, scope of supply and much more are provided at only very reasonable extra costs. The above table values only indicated the standard models.
 

CONTAINERISED STEAM BOILER ROOM

AB&CO · TT BOILERS offers container solutions comprising all equipment for ensuring a efficient steam production.

Containerized solutions are used widely as an fast and economical way to establish steam up to 2400 kg/h.

It can be used as an emergency steam back-up, when a steam supply fails and a fatal situation occurs. With a container solution from AB&CO · TT BOILERS you can rapidly be "on-steam" again.

This solution is used for end-user of steam, but it is certainly also as an attractive business opportunity to buy these for renting out - and thus offering the above services to end-users.

Steam generator boiler are also available in :

Read more about mobile solutions

Delivery options


10 / 20' containers :

Up to 1200 kg/h steam
operating pressures 1 - 190 bar


Up to 2400 kg/h steam
on two steam generator boilers
operating pressures 3 - 190 bar

 

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