Heat-pipe type boiler/furnace/kiln flue-gas waste-heat recovery device

Abstract

The invention discloses a heat-pipe type boiler / furnace / kiln flue-gas waste-heat recovery device which externally consists of a cylindrical horizontal vessel and a heat pipe set, wherein the cylindrical horizontal vessel is provided with a support, supported on the outside of the top of a flue by the support, and respectively connected with a water inlet valve, a safety valve, a pressure gauge, a discharge valve, a water outlet valve, a liquid level meter and a blow-off valve by pipes; the heat pipe set is composed of a plurality of heat pipes which are arranged according to a certain rule, the upper half parts of the pipes stretch into the water in the horizontal vessel, and the lower half parts of the pipes are inserted in the flue, so that mediums in the pipes are heated by high-temperature flue gas in the flue so as to form a steam flow, the steam flow transfers heats to the upper half parts of the heat pipes in the process of upward movement and then transfers the heats to the water in the vessel, after the heats are released, the mediums are condensed into liquid, and then the liquid flows back to the lower half parts of the heat pipes, after the process is circulated repeatedly, the heats in the flue gas are collected and rapidly transferred to the vessel so as to heat the water in the vessel to a high temperature. The waste-heat recovery device disclosed by the invention is high in heat efficiency, less in heat-transfer loss, safe and reliable.

Description

technical field [0001] The present invention relates to the field of heat energy supply, in particular to a station building that uses boilers and kilns to provide heat sources, and recycles and utilizes high-temperature waste heat in the soot exhaust gas discharged from the tail of the flue after being burned by boilers or kilns. Waste heat recovery device. Background technique [0002] Exhaustion of energy, shortage of coal burning, serious environmental pollution, energy saving, emission reduction, and environmental protection are the top priorities of the world today, because it is related to the deterioration of the human living environment and the pace of sustainable development of the world economy. The reform and opening up has enabled my country's economy to develop rapidly, so the demand for energy is also increasing. As a cheap traditional energy source, the contradiction between supply and demand of industrial raw materials is becoming more and more serious. Alth...

AI Technical Summary

Problems solved by technology

[0003] At present, the boilers and kilns of most manufacturers use coal-fired combustion to provide heat sources, with high fuel consumption, low thermal efficiency, and backward waste discharge technology.

We know that burning coal produces a large amount of fly ash and flue gas after burning in the furnace, which enters the chimney through the flue and is discharged into the atmosphere, so that a large part of the heat is brought to the into the atmosphere, resulting in a great waste of energy

At the same time, because a large amount of fly ash and flue gas are discharged into the atmosphere from the chimney, it has caused great pollution to the surrounding environment and greatly reduced the air quality.

However, due to the tight supply in the coal market, the quality of coal used by many boilers and kilns is unstable. In order not to affect production, some enterprises have to use coal with small particle size and many powders for combustion. However, these coals are burned during the combustion process. A large amount of fly ash and dust will be generated in the process. Although the economizer located in the vertical flue at the tail of the boiler has used part of the waste heat of the flue gas to heat the boiler feed water in the front section, reducing the exhaust gas temperature, but there is still part of the heat entering the horizontal flue gas. According to the test, the temperature of the exhaust gas in this part of the flue can reach about 160-200°C. The considerable heat emitted together with the fly ash is a very large energy loss, and it is produced by wasting a lot of fuel. At the same time, the soot and exhaust gas discharged will pollute the surrounding environment, and will also cause disputes and conflicts between the enterprise and the surrounding residents, so that the operating cost of the enterprise will increase greatly, while the profit margin will be relatively reduced.

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