Two-way loop circulating cooling tower device and control method

Abstract

The invention provides a two-way loop circulating cooling tower device. The device comprises a tower body, wherein a water inlet is arranged in one end of the tower body; an air outlet is arranged in the other end of the tower body; the water inlet is connected to a plurality of nozzles through a water distribution pipe; and an air inlet is arranged in the bottom of the tower body. The two-way loop circulating cooling tower device is applied to a desulfurization wastewater zero discharge process in the industries such as electric power, metallurgy and the like, the evaporation heat exchange efficiency of a cooling tower in a by-pass flue heating and normal-temperature evaporation process is improved by at least one time, the equipment diameter and height are greatly reduced, the occupied area is reduced, and the investment in the cooling tower is reduced. The device provided by the invention has low requirements on particles in wastewater in use and operation, can normally operate under the conditions of 5% of solid content and particles with the particle size of 200 microns, and is suitable for a cooling water system and a desulfurization wastewater normal-temperature evaporation system which are high in solid content, large in particles in water, high in viscosity and easy to scale.

Description

technical field [0001] The invention belongs to the technical field of desulfurization wastewater resource treatment, and in particular relates to a double-pass loop circulation cooling tower device and a control method. Background technique [0002] As the country's requirements for environmental protection are getting higher and higher, the treatment of desulfurization wastewater is getting more and more attention. During the treatment of desulfurization wastewater, a large amount of calcium hydroxide (sodium hydroxide) is added to remove hardness, resulting in a large amount of mud. processing costs, and cause solid waste pollution and waste of resources. The main salt ions in desulfurization wastewater are Mg2+, Ca2+, SO42-, Cl-, etc., and the main excessive pollutants are suspended solids, chloride, sulfate, CODcr, fluoride, total mercury, sulfide, total cadmium, total nickel and total Zinc etc. [0003] The traditional and conventionally designed desulfurization wast...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is that in the prior art, the cooling tower distributes water from the upper part of the tower body and sprays from top to bottom. Due to the large particle size and the high viscosity of the wastewater, a large-aperture nozzle is required to keep the nozzle from being blocked. The jetted wastewater has a large flow, and the area for heat exchange with the cold air is small, resulting in low heat transfer efficiency. The equipment needs to be Only when it is very large can the effect be guaranteed, and the investment is increased, so as to provide a double-pass loop circulation cooling tower device and control method

Images