Self-adjusting energy-saving device for oil-burning gas-fired boiler

Abstract

The invention relates to a self-adjusting energy-saving equipment for oil or gas boiler, comprising heat exchanger, mixer and temperature measurement control module. The heat exchanger comprised by shell and heat exchanger body in the shell is set at the outlet of high temperature flue gas at the tail of boiler. The mixer is connected with the heat exchanger by water pipe and comprises cylinder, compound pipe set at one inner side of cylinder, and a pair of multi-hole boards set at the other inner side of cylinder in a distance. Heat resistance at the flue gas side in temperature measurement control module is set in the shell at the inlet of flue gas in heat exchanger, heat resistance at the water supply side is set on the water pipe connected with heat exchanger and mixer, and temperature control adjustable valve is set at the inlet of heat source in mixer. The invention makes full use of the residual heat at the tail of boiler. It can improve the heat efficiency of boiler greatly and decrease the temperature of exhaust gas. It has the self-adjusting performance for temperature of heated metal wall at the tail of boiler so that condensation and corrosion in low temperature at the tail of boiler are not generated and the safe running of boiler is ensured.

Description

technical field [0001] The invention relates to an energy-saving device arranged at the tail of a boiler, in particular to a self-regulating energy-saving device for a fuel-fired gas boiler. Background technique [0002] my country is a country with energy shortages, especially oil and gas resources. Therefore, energy saving of boilers and improvement of fuel utilization are long-term and important tasks. [0003] Sulfur contained in boiler fuel oil produces SO after combustion 2 . SO in flue gas 2 And when the water vapor comes into contact with the metal wall at the bottom of the boiler - the cold surface, it condenses and forms liquid sulfuric acid. At this time, it is attached to the metal wall of the heating surface of the boiler tail and corrodes the metal wall. [0004] Although natural gas contains almost no sulfur, it produces a large amount of water vapor after combustion. The flue gas with a large amount of water vapor condenses when it touches the metal wall...

AI Technical Summary

Problems solved by technology

The low-temperature corrosion of the boiler tail has been considered in the design of this boiler. The energy-saving device usually uses relatively good corrosion-resistant stainless steel, which makes the production cost of the boiler very high, at least twice that of conventional boilers.

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