Needle tube oil burning boiler with energy-saving economizer

[0008] The present invention will be further described in detail below with reference to the drawings and preferred embodiments.

[0009] Such as figure 1 As shown, the needle tube oil-fired boiler with an energy-saving economizer mainly includes: a shell 1, a furnace 2 is arranged inside the shell 1, and a number of needle tube assemblies 4 are connected to the top of the furnace 2, and the shell 1 A smoke box 5 is provided on the top, and the top of the needle tube assembly 4 is connected to the smoke box 5, and the top of the housing 1 is also provided with a steam outlet 9, and the smoke box 5 is connected with energy-saving and economical The structure of the energy-saving economizer includes: an energy-saving economizer housing 6, the bottom of the energy-saving economizer housing 6 is connected to the smoke box 5, and the energy-saving economizer housing 6 is connected with an exhaust pipe 7, which is energy-saving and economical A serpentine tube 8 is provided in the housing 6, the upper interface 81 of the serpentine tube 8 is connected with the water supply pipe, and the lower interface 82 of the serpentine tube 8 is in communication with the inner cavity of the housing 1.

[0010] The working principle of the present invention is as follows: When the needle-tube oil-fired boiler with energy-saving economizer is working, the heat generated by the combustion in the furnace 2 is directly transferred to the boiler water in the shell 1, and the flue gas generated in the furnace 2 enters the needle-shaped tube assembly 4, and transfer part of the heat to the boiler water in the shell 1, from the needle tube assembly 4 to the smoke box 5, the flue gas continues to go up to the energy-saving economizer, and the flue gas transfers the heat to the serpentine tube 8 The water supply interface is connected with the upper interface 81 of the serpentine tube 8, so that the boiler water that needs to be replenished flows from the upper end of the energy-saving economizer to the lower end of the energy-saving economizer, forming a countercurrent to the upward trend of flue gas. The flue gas better transfers heat to the water in the serpentine tube 8, and the heated water flowing out of the lower port 82 of the serpentine tube 8 enters the housing 1 again. The steam formed by heating the boiler water in the shell 1 is discharged from the steam outlet 9.

[0011] The advantage of the present invention is: because an energy-saving economizer is installed on the smoke box 5 on the top of the needle-shaped oil-fired boiler, the boiler water that needs to be refilled enters the serpentine-shaped economizer from the upper interface 81 of the serpentine pipe 8. The pipe 8 absorbs the heat of the high-temperature flue gas entering the energy-saving economizer shell 6 from the flue box 5, and then enters the boiler shell 1, and the temperature of the high-temperature flue gas discharged from the flue box 5 After lowering, the energy-saving economizer is discharged. In this way, the waste heat of the flue gas in the flue box 5 is fully utilized, heat energy loss is reduced, the economic operation level of the needle-tube oil-fired boiler is improved, and the operating cost of the needle-tube oil-fired boiler is reduced.