In steam generators TGH(S) forced recirculation, wherein water at high speed and under pressure goes through several nested coil pipes in parallel while combustion gases are forced to move along the coil surface, is used. Hot gas envelops the whole surface of the pipes using both radiant and convection heat to the uttermost, whereby highly intensive heats exchange is guaranteed.
When reaching saturation point water is picked out from a steam drum and forcibly discharged under pressure of recirculating pump through coil pipes at the velocity that is 3 times as high as the top speed of steam is. Then water goes back to the steam lance at the top part of the drum, where steam is blown off and effectively separated. 99% of dry stream is drawn off the drum; water thus becomes a source of energy, which is powering recirculating centrifugal pump.
Solid elements congregate at the bottom of a separator and are blown out from there when blowing valve is open. Pressure-sensitive control element which reacts in steam pressure within the drum regulates fuel and air arrival to burner and provides effective burning on the whole scale of boiler modulation. High efficiency without shock load on all operative range is provided, not only by rated output.
Integral protecting means, which monitor, firstly, the main flame and initiate switching out if flame is lost, and, secondly, the fact that steam drum is out of combustion zone, guarantee maximum safety of boiler while in operation.
Complex system of chemical treatment and deaeration of boiler feed water is included into delivery set.
Water conditioning system of steam generators TGH
Water conditioning for any boiler implements two major functions:
Delivery set of the TGH steam generator equipment includes integrated system of chemical treatment and deaeration of feed water constructed on steel platforms.
A softener of feed water, a deaerator plant and a system of chemical additives make up integrated system of chemical treatment of water.
System of water softening consists of two parallell filters with one control module for water purification from hardness, dissolved Fe, organics and heavy metals (the filtering substance - mixture of ion exchange resins) is aimed at sludge emergence prevention on the walls of coil pipes of the steam generator. Regeneration is conducted automatically if needed. At the same time the filter that was in operation trasferres to the regeneration stage, it is replaced by the other filter that was previously in standby. After the regeneration is completed the first filter goes to standby stage. The process is cyclic.
Deaeration plant of atmospheric type is aimed at the removal of corrosion-aggressive gases (oxygen and loose CO2) from the feed water while it is heated. The deaeration plant includes:
The deaeration plant in tandem with the control panel is based on a steel platform.
System of chemical additives is aimed at the extra treatment of the feed water and at the removal of the rest of hardness, which succedeed in coming through the softener. These are examples of extra treatment (à) use of phosphates, (b) carbonates, (c) chelants, (d) polymers, (e) combinations of the substances named above.
Extra chemical treatment without softening doesn't guarantee sufficient results. The rate of the sludge occuring will be deminished, but the very sluge will not be removed.
System of chemocal treatment includes:
We strongly recommend you to ask our company representatives for consultation on the water treatment. This will enable you to make the right choice of the method and reagents that will correspond with your boiler and system.
Rapid start and switching off (5 minutes)
Control range – 7:1
Firing type – spark, discontinuous gas pilot
Speedy reaction on the heat stress alteration (1 minute)
Fuel – natural gas, diesel oil
Safety control - ultraviolet scanner of flame, individual monitoring of coil pipes temperature
Small size (requires 30% less space)
The proposed heat and power installations have various advantages:
1. Economical efficiency:
Rapid start and immediate switching off. Warm up time does not exceed 5 minutes after start, which allows you to use fuel more efficiently in terms of economy (up to 15% less).
Quick response on alteration of heat stress (the number of curing rooms in operation). Response time is no more then 1 minute thanks to effective system of management of the burner and small volume of the water circulating within the coil pipes.
Gradual regulation of power. The maximum possible control range of productiveness is 7:1, which allows uninterruptably provide consumers with heat without activation of switching on or off regimes with low system load. The quality of the steam nevertheless remains permanent.
Constant presence of operating personnel while generator is in operation is not necessary.
Since fuel economy depends on many factors, the general economy will depend on the peculiarities of use of steam generators. Economy while using steam generators TGH(S) may reach 25% in comparison with conventional boilers.
2. Peculiarities of technology and construction:
Small outer surface means small space for convection and small radiant energy losses. Due to large size of fire-tube boilers their convection losses make up approximately 3% depending on the type of a boiler-house. The same losses in steam-generator TGH(S) are less than 0,7%.
Multi-fuel technology. Natural gas, diesel oil, propane all can be used as a fuel. Transition from the one type of fuel to the other is reached through a turn of selective switch.
Steam generator TGH(S) construction guarantees its reliable operation, the simplicity of technical service and safe exploitation. Steam generators TGH(S) are not subject to thermal shocks even if frequently switched on and off.
Compatibility with existing boiler technologies. Small size and weight, the absence of need to build special basement allow to install steam generators TGH(S) within existing boiler-houses and in other working areas to get extra steam or step-replacement of overage boilers.
Steam generator construction guarantees:
Period of liability for defects for steam generators TGH(S) – 24 months.
Main technical characteristics and size