Heat conduction oil cooling type low-NOx pulverized coal burner cooling system and cooling method

Abstract

The invention discloses a heat conduction oil cooling type low-NOx pulverized coal burner cooling system and cooling method. The cooling system comprises a burner and a cooling circulating device, wherein the burner is connected with heat user equipment through the cooling circulating device, the rear end of the burner is provided with a furnace cavity, the cooling circulating device comprises anoil return branch pipe, an oil outlet branch pipe, an oil outlet total pipe, a parallel-connection oil pipe and a spiral coil, the spiral coil is connected with the oil outlet branch pipe, the oil outlet total pipe, the heat user equipment, an oil return total pipe and the oil return branch pipe in sequence through a heat conduction oil outlet, and the oil return branch pipe is connected with a heat conduction oil inlet of the spiral coil. By means of the heat conduction oil cooling type low-NOx pulverized coal burner cooling system and cooling method, the energy efficiency of an organic heatcarrier boiler can be improved, smoke pollutant emission is reduced, the spiral coil is adopted as a fundamental component of a burner cooling component, boiler own circulating heat conduction oil isutilized to cool the burner, the oil temperature is controlled through the heat conduction oil flow quantity, occurrence of heat conduction oil overheated coking is avoided, and the running safety ofthe burner is guaranteed.

Description

technical field [0001] The invention relates to the technical field of thermal oil pulverized coal industrial boilers, in particular to a cooling system and cooling method for a thermal oil-cooled low NOx pulverized coal burner Background technique [0002] The organic heat carrier boiler is a new type of thermal energy equipment that uses heat transfer oil as the circulating medium to provide heat. It uses heat transfer oil as the heat carrier, and the heat carrier is circulated through the heat oil pump to transfer the heat to the heat-consuming equipment. It has high temperature and low pressure. At the same time, the equipment does not require water treatment equipment and has no heat loss such as running, running, dripping, and leaking of steam boilers. Therefore, it is more and more used in heating equipment in food, chemical, and anti-weaving industries. [0003] At present, most of the coal-fired organic heat carrier boilers are mainly tube-frame chain furnaces. The ...

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Problems solved by technology

[0008] Aiming at at least one defect in the above-mentioned prior art, the present invention provides a cooling system and cooling method for a thermal oil-cooled low-NOx pulverized coal burner to solve the problem of energy waste caused by the water-cooling method of the organic heat carrier boiler burner , improve boiler energy efficiency, reduce flue gas pollutant emissions, and in view of the fact that the jacketed cooling structure is not suitable for the heat transfer oil cooling method, the spiral coil is used as the basic structure of the heat transfer oil cooling method, so that the heat transfer oil is forced in the spiral coil Circulate and reach a turbulent state, thereby reducing the oil film thickness of the heat transfer oil near the wall, avoiding over-temperature coking, and ensuring the safe operation of the organic heat carrier boiler

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