Coal economizer equipment for afterheat recovery and application method thereof

Abstract

The invention discloses coal economizer equipment for afterheat recovery and an application method thereof, and solves the problem of instable flow and temperature of hot water in traditional coal economizer equipment. The equipment comprises a coal economizer, and an industrial water heating device and a smoke heat exchange device connected with the coal economizer, wherein the industrial water heating device comprises a water pump connected with a cold water inlet of the coal economizer through a water inlet electric valve, a cold water bypass valve, a reflow water pipeline and multiple mixer water adding pipelines connected to a hot water outlet pipe of the coal economizer, and a new production pool. The smoke heat exchange device comprises a hot water temperature detector arranged at the end of a hot water outlet pipe in the hot water outlet of the coal economizer, an air inlet electric valve connected to a pipeline between a hot smoke inlet of the coal economizer and an annular cooler, and a smoke bypass electric valve. The equipment can prepare the hot water as required, and can stabilize the temperature of water in the hot water outlet of the coal economizer through changing the smoke flow, so that the stable control of the temperature of a mixture in the sintering production is facilitated. If the coal economizer is broken down, the production of a main sintering system is not influenced.

Description

technical field [0001] The invention relates to waste heat recovery equipment and a method, in particular to a waste heat recovery economizer equipment and a use method thereof. Background technique [0002] In iron ore sintering, in order to improve the recovery and utilization efficiency of the waste heat of the annular cooler in the sintering process, some sintering enterprises have added an economizer (a kind of heat exchanger) at the corresponding exhaust pipe of the annular cooler. The low-temperature flue gas at 150-200°C discharged by the ring cooler is used to produce hot water at about 60-80°C, which is used as the added water required by the mixer for the sintering machine to increase the temperature of the sintering mixture and improve the mixing system. particles, and finally strengthen the sintering process and improve the quality of sintered ore. [0003] The structure of the existing waste heat recovery economizer equipment is as follows: figure 1 As shown,...

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Problems solved by technology

[0011] The existing waste heat recovery economizer equipment with the above structure produces hot water according to the recovery of waste heat flue gas, and due to the large fluctuation of flue gas volume and temperature, the production of hot water also has a corresponding large change

However, the total amount of water required to be added to the mixer is relatively stable, which creates the problem of inconsistency between hot water production and demand, which in turn leads to a series of production problems such as redundant hot water treatment, temperature fluctuations of added water, etc., which affect the sintered mixture. quality

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