Pump station cooling water circulating system and control method thereof

Abstract

The invention discloses a pump station cooling water circulating system which comprises a roof water tank, a water pump bearing, a cooling water tower and a cooling water circulating pipe network. The cooling water circulating pipe network communicates with the roof water tank, the water pump bearing and the cooling water tower. The cooling water circulating pipe network is provided with a circulating water pump. The pump station cooling water circulating system is characterized in that a pressure control valve and a flow control valve are arranged on the cooling water circulating pipe network and connected with a control unit, the control unit judges whether temperature rise of the bearing reaches the set threshold value of starting of the circulating system or not according to the bearing temperature rise and water pump rotating speed at any time point in the water pump running process, and then the opening degree of the pressure valve and the opening degree of the flow valve are adjusted in real time by calculating flow and pressure needed for cooling of the circulating system at the time point. The pump station cooling water circulating system has the beneficial effects that the cooling water circulating system is optimized, the cooling effect is enhanced, and energy saving and emission reducing are achieved.

Description

technical field [0001] The invention relates to a pumping station system, in particular to a pumping station cooling water circulation system and a control method thereof. Background technique [0002] There are 6 large mixed flow pumps in the SB pumping station of Shanghai Urban Drainage Co., Ltd. Bailonggang Sewage Delivery Branch. This type of water pump has three water cooling protection systems of cooling water for the upper and lower bearings and sealing water for the pump stuffing box. Both the cooling water and sealing water are supplied by tap water, and the bearing cooling water adopts an internal circulation device. Due to the working principle, the cooling water circulation starts before the pump is turned on and stops after the pump is stopped. The circulating water volume is also fixed. Under the condition of unreasonable operation of the circulation system, the monthly consumption of tap water for cooling water is still a considerable expense after calculating...

AI Technical Summary

Problems solved by technology

This control method is simple and clear, but there are huge disadvantages: 1) The cooling water circulation system starts too early, and the temperature rise of the motor and water pump bearings does not occur, resulting in a large amount of waste of cooling water

2) The manual work intensity of the workers is high, and there is a situation that the opening of the valve is different for everyone, and the pressure and flow control of the pipeline is not accurate enough

3) The flow rate and pressure of the cooling circulating water are fixed. After the frequency conversion technology is introduced into the water pump, the speed will change again, and the temperature rise of the motor and water pump bearing will change again. However, the cooling circulating water cannot be changed, and the cooling effect is not ideal.

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