Self-balancing method for cooling water of slag extractor

Abstract

The invention discloses a self-balancing method for cooling water of a slag conveyor. A first water inflow pipe is arranged above the slag conveyor and provided with a first water inflow valve with the adjustable opening degree. The slag conveyor is provided with an overflow port. A slag water adjusting pond communicated with the overflow port is formed below the slag conveyor. A first conveying pipeline is arranged between the slag water adjusting pond and the slag conveyor. The self-balancing method for cooling water of the slag conveyor comprises the following steps: the consumption amount of the cooling water of the slag conveyor is counted, and the water supplementing amount of the slag conveyor is calculated according to the consumption amount; the opening degree of the first water inflow valve is set according to the water supplementing amount so that the water supplementing amount and the consumption amount of the slag conveyor can be balanced during normal running, and the level of water in the slag conveyor keeps at the overflow port; the first water inflow valve is opened; and slag water overflowing from the slag conveyor is collected by a slag water adjusting pond, and the slag water is conveyed back to the slag conveyor through the first conveying pipeline to be circulated. The method effectively prevents the level of water in the slag conveyor from being lowered, enhances the impact resistance of the slag conveyor, prolongs the service life of the slag conveyor and improves the safety and the reliability of the slag conveyor.

Description

technical field [0001] The invention relates to the technical field of coal-fired boiler slag discharge, in particular to a self-balancing method for cooling water of a slag extractor. Background technique [0002] The working principle of the existing cooling water non-overflow self-balancing operation mode of the slag scraper is as follows: when the slag scraper is in normal operation, it continuously provides guide wheel shaft sealing water and chain flushing water intermittently, and generally does not perform other continuous replenishment of water. The amount of water is evaporated by radiation in the slag machine and taken away with the slag. The total water intake and consumption are basically balanced. The water level in the slag machine is maintained within the set range without overflowing. The flow replenishes water to the set high water level and stops. The heat is self-balanced through slag water evaporation and heat radiation, and the water temperature in the...

AI Technical Summary

Problems solved by technology

[0003] At present, there are still some problems in this cooling water balance method of the slag removal machine: since the cooling water in the slag removal machine is naturally consumed to a low water level before replenishing water, the water level in the slag removal machine is often at a low water level, which affects the The impact resistance of large slag lumps that are coked at a height of tens of meters in the boiler and can weigh several tons is reduced, which shortens the service life of the slag extractor, which is not conducive to the safe and reliable operation of the slag extractor.

At the same time, since the cooling water in the slag removal machine is naturally consumed to a low water level, the water is replenished, so the water level in the slag removal machine is often at a low water level, and the large slag blocks coked by the boiler have a greater influence on the water temperature, and the water temperature tends to rise. The water temperature in the slag scraper often exceeds 70°C

When the water temperature exceeds 70°C, a large flow of water needs to be replenished correspondingly, which will often cause a high water level in the slag pool, and the excess overflow water needs to be discharged to the power plant wastewater station for treatment, which increases operating costs

Images