A water supply system for sintering waste heat power generation boiler

Abstract

The invention discloses a water feeding system for sintering a waste heat electric generating boiler. The water feeding system comprises a deaerator, a first water feeding pump, a second water feeding pump, a first hand valve, an electric outlet valve, a protopipe, a first valve system, a second valve system, a one-stage water preheater, a two-stage water preheater, a first boiler barrel, a second boiler barrel and a third boiler barrel, wherein an outlet of the deaerator is communicated with an inlet of the first water feeding pump and an inlet of the second water feeding pump through pipelines; an outlet of the first water feeding pump and an outlet of the second water feeding pump are respectively communicated with an inlet of the protopipe through the first hand valve and the electric outlet valve; and an outlet of the protopipe is divided into three paths, wherein the first path is communicated with the first boiler barrel through the first valve system and the one-stage water preheater, the second path is communicated with the second boiler barrel through the two-stage water preheater, and the third path is communicated with the third boiler barrel through a third valve. Through the adoption of the water feeding system, the safety of the system can be effectively improved, and the running cost of the system is reduced.

Description

technical field [0001] The invention relates to a water supply system, in particular to a water supply system for a sintering waste heat power generation boiler. Background technique [0002] In the water supply system of traditional sintering waste heat power generation boilers, three feedwater pumps are generally used for water supply, and the operation mode is dual-purpose and one-standby, which is uneconomical, increases labor costs and spare parts rates, and leads to increased plant power consumption and maintenance Maintenance costs are high, refer to figure 1 , in the process of operation, there is a large surplus of water supply, which is adjusted through its outlet door or recirculation door. If the adjustment is not timely or improper, it will cause the feedwater pump to hold pressure and cause large vibration. The water supply of the three steam drums of the boiler The regulating valves are installed near the respective steam drums, and are opened and closed acco...

AI Technical Summary

Problems solved by technology

[0002] In the water supply system of traditional sintering waste heat power generation boilers, three feedwater pumps are generally used for water supply, and the operation mode is dual-purpose and one-standby, which is uneconomical, increases labor costs and spare parts rates, and leads to increased plant power consumption and maintenance Maintenance costs are high, refer to figure 1 , in the process of operation, there is a large surplus of water supply, which is adjusted through its outlet door or recirculation door. If the adjustment is not timely or improper, it will cause the feedwater pump to hold pressure and cause large vibration. The water supply of the three steam drums of the boiler The regulating valves are installed near the respective steam drums, and are opened and closed according to the water level of the steam drums; if the water level of a certain steam drum is high, the water supply regulating valve is closed, so that the water supply pipes from the vicinity of the steam drums to the outlet of the feed water pump will feed water to a certain steam drum. The pipeline continues to be under pressure, causing leakage of pipeline welds due to cracks due to lame pressure, valve flanges, and safety valve joints. The water in the tank is not replenished with new water, which leads to vaporization and volume expansion, causing deformation of the pipeline, causing the feedwater pump to vibrate greatly due to the lame pressure of the pipeline, causing frequent switching of the pump to start and stop, increasing the number of maintenance, reducing the service life of the pump and motor, and increasing Reduced labor cost and spare parts rate, resulting in increased plant power consumption and high repair and maintenance costs, and in the process of operation, the safety of the system is not high

[0003] In addition, the three steam drum feed water regulating valves of the original boiler are designed to control the water supply by the main circuit electric control valve and the bypass manual door. If the main circuit electric control valve fails, the operator needs to operate the manual valve on site to control the water supply. Guarantee the water level of the boiler; this will lead to an increase in personnel costs and labor intensity of operating personnel, and it is inconvenient to maintain and replace. Boiler System Safety

Images