The massive use of boilers, solid fuel, puts to the owners of private houses special requirements. Despite technological advances, would bring the modern solid-heaters to perfection, the work of this equipment carries a certain danger. Malfunctions, abuse of heating equipment can cause equipment failure at the height of the heating season. In the worst case, the occurrence of extraordinary events to working unit can result in serious injuries for the inhabitants of the house, damage to residential buildings.
In this aspect, one of the most important conditions for the safe operation of the protection will be coal-fired boiler from overheating. Strict adherence to safety rules of operation of the heating equipment, the presence of a functioning automation and control instruments, would provide you with the necessary protection against unforeseen situations.
Let us consider in more detail on what is based boilers protection against overheating. With what may be due to boiling in a heated coolant circuit and what are the consequences of such an emergency.
The reasons, as a result of which it may be overheating of solid fuel boilers
Even at the stage of choosing and buying it is important to consider the performance of the heater. Many of the models that are currently represented in the sale have been built to protect the system from overheating. It works or not - is another question. However, it must adhere to the specific knowledge and skills, hoping to create at home efficient and safe autonomous heating system.
The operating conditions depends on reliable operation of the heating unit. When overt violations of the technological parameters of the heating equipment and abuse of standard safety rules, a high probability of an accident.
For reference: temperature rise in the combustion chamber of admissible parameters may cause boiling of the boiler water. The result of the process becomes uncontrolled depressurization heating circuit, destruction of the heat exchanger housing. In the case of boilers when overheated possible explosion.
To prevent possible negative effects can be still at the stage installation solid fuel boiler. Correct tying the heater will ensure your safety and reliable operation of the unit in the future.
Speaking in detail, in each case, the system of protection of solid fuel boiler has its own peculiarities and features. Each heating system has its pros and cons. For instance:
- When it comes to solid fuel fired boilers with natural circulation of coolant, you need to take care of the safety and efficiency of heating equipment even during installation. Pipes installed in the system metal. Wherein the diameter of such pipes should exceed the diameter of the pipe used for lining loop with forced circulation of coolant. Sensors installed on the water circuit will signal a possible overheating of the coolant. The safety valve and the expansion tank are playing the role of the compensator, reducing the excess pressure in the system.
A significant disadvantage of gravitational heating systems is the lack of an effective mechanism for adjusting the operating modes of solid fuel boilers.
- Great technological opportunities for consumers provide combi solid fuel boilersOperating with forced circulation of coolant in the system. Already the presence of only the second circuit considerably increases the possibility to regulate the temperature of the boiler water heating. The only negative in the work of such a system is operated pump that can make their work difficulties in the operation of the heating system.
This is due to the fact that during a power failure, the pump does not function. Stopping the circulation process and the inertia of the heating boiler for solid fuels can cause overheating of the heating unit. If the boiler is not equipped with appliances bespereboynikThe situation is fraught with power outages are extremely unpleasant consequences.
Effective protection against overheating operating coal-fired boiler should be based on the mechanism of removal of excess heat generated by the heating appliance.
What are some ways to protect against overheating of heating equipment
Companies - manufacturers are trying to improve the consumer appeal of their products, to make the data sheet of the boiler equipment, any guarantee of its security. Personal protective equipment boiler from boiling, uninitiated user does not have the slightest idea.
There are at present the following methods to protect solid fuel assemblies used for autonomous heating systems. The efficacy of each method is explained boiler technology operating conditions and constructional features of aggregates.
In most cases the data sheet for the heater manufacturers recommend the use of tap water for cooling. In some cases, heating solid fuel boilers are equipped with a built-in an additional heat exchanger. There are models of boilers with remote heat exchangers. To prevent overheating, use of safety valve. The safety valve is designed only to excessive pressure in the system, while the safety valve in case of overheating of the boiler provides access tap water.
Important! In the presence of iron heating apparatus, such a measure is fundamentally incorrect. Cast exchangers panic afraid of sharp temperature drop. Feed in cold water circuit can lead to loss of integrity of the heat exchanger housing. (Heated to a high temperature iron burst simply by contact with cold water).
mark coolant temperature in excess of 100 0C creates an overpressure valve opens. Under the action of tap water which is supplied under a pressure of 2-5 bar, hot water from the cold loop is displaced.
The first aspect, which causes controversies about the cooling tap water - no electricity, ensuring operation of the pump. Expansion tank does not have sufficient volume of water sufficient for cooling the boiler.
A second aspect that rejects this cooling method, it involves using as antifreeze coolant. When an abnormal situation in the sewer together with the incoming cold water will go up to 150 gallons of antifreeze. Whether it is necessary that this method of protection?
The presence of the UPS will keep the work of the circulating pump in a critical situation, with which the coolant is uniformly disperse the pipeline, without having to overheat. Until enough battery capacity, uninterruptible power supply ensures the pump. During this time, the boiler does not have time to warm up to the critical parameters, work equipment that runs on water substitute, emergency circuit.
Another way to exit from the critical situation is to install an emergency circuit to harness the solid aggregate. Disabling operation of the pump can be duplicated Substitute circuit with natural coolant circulation. The role of the emergency circuit can not provide residential heating, and the only possibility to remove the excess heat energy during an emergency.
On a note: the emergency circuit unit can be replaced by the bypass assembly, which in extreme cases will take overheated boiler water in the expansion tank or the heat accumulator.
Such a scheme of protection of the heating unit from overheating, reliable, simple and easy to use. Special funds for its equipment and the installation of you do not need. The only conditions for such protection are:
- the presence of the expansion vessel or storage container in the system;
- the use of a check valve only daisy type;
- second circuit pipes should be bigger diameter than the ordinary heating circuit.
conclusion
Assessing the technological capabilities of modern solid fuel boilers, you should think about not only his labor power, but also foresee the installation of protection elements of the entire system. Overheating of the boiler - the phenomenon frequent and familiar to residents of private homes. Use existing tools to ensure the protection will not only avoid emergency situations, but also to extend the work of the heating units. Everyone will choose the means and methods of protection. One will be enough to install an electric generator, which together with the UPS does not allow to stop the water circulation in the system. Other owners of private homes, by contrast, need for security bypass or to equip the reserve, the emergency circuit.
According to experts, the installation of buffer capacity or the installation of a bypass are the most effective ways to protect the heating system against overheating.
Note: the use of solid devices is prohibited without the buffer capacity in the US and in Europe.
