Oil-gas organic heat transfer furnace

Abstract

The invention discloses an oil-gas organic heat transfer furnace, which comprises a barrel body and a coiled pipe; the barrel body is a box body with a quadrate cross section; and the coiled pipe is a quadrate box shaped coiled pipe which is formed by connecting a plurality of linear single pipes and is provided a quadrate cross section in whole. According to the oil-gas organic heat transfer furnace disclosed by the invention, a radiating section of a combustion chamber adopts a structure of the quadrate box shaped coiled pipe and is formed by welding and assembling bent steel pipes, thus, requirements for the equipment is low, the production can be convenient to carry out, and common medium and small-sized boiler plants can produce large-scale organic heat transfer furnaces; moreover, a convection section has the structure formed by a plurality sections of snake-shaped convection pipes; the oil-gas organic heat transfer furnace has the effects of gas sweeping and heat exchange superior to the coiled pipe clearance sweeping; and an air preheater is integrated into the boiler body, thus, little loss is generated in heat dissipation, the structure is simple, and lower resistance is brought by the gas and the air.

Description

technical field [0001] The invention belongs to the field of boilers, and mainly relates to a large-scale and high-efficiency organic heat carrier furnace of fuel oil and gas. Background technique [0002] The oil-fired gas organic heat carrier furnace uses light oil, heavy oil, and gas as the main fuel, and heat transfer oil as the heat carrier. The circulating oil pump is used for forced circulation to transfer the heat energy to the heat-consuming equipment, and then returns to the boiler for reheating. [0003] In the past, large-scale oil-fired gas organic heat carrier furnaces often used a cylindrical coil structure. The structure is shown in figure 1 , is mainly composed of coil tube A1, front cover A2, rear cover A3, cylinder A4, oil inlet header A5, oil outlet header A6, and burner A7. It is favored by users because of its compact structure, small size, factory package, small footprint, and high degree of automation. But this boiler still has the following deficie...

AI Technical Summary

Problems solved by technology

[0004] 1. The air preheater B is outside the boiler, resulting in a complex and loose structure

Due to the high temperature of the heat carrier in the organic heat carrier furnace, the exhaust gas temperature is generally 300-400°C. This exhaust gas temperature is very uneconomical for the boiler. In order to reduce the exhaust gas temperature, for the organic heat carrier furnace , the air preheater is generally used to recover the waste heat, such as figure 2 As shown, the boiler body A is additionally equipped with an air preheater B. This configuration makes the overall structure of the boiler relatively loose;

[0005] 2. The flue gas washes in the gap of the coil, and the heat exchange efficiency is low;

[0006] 3. The organic heat carrier furnace with large cylindrical coil structure requires large coil equipment, which is not available in ordinary boiler manufacturers.

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