Novel dry-wet cooling tower and evaporative condenser

Abstract

The invention provides a novel dry-wet cooling tower and an evaporative condenser. An equipment frame is included. An upper layer of basic heat exchange units and a lower layer of basic heat exchange units are arranged in the equipment frame, a water collecting tank is arranged at the bottom of the equipment frame, and a fan is arranged on the top of the equipment frame. Each layer of basic heat exchange units includes two basic heat exchange units. Each basic heat exchange unit comprises a fin type heat exchanger and a spraying heat exchanger. The fin type heat exchangers are arranged close to the side walls of the equipment frame, and the spraying heat exchangers are arranged on the sides, away from the side walls of the equipment frame, of the fin type heat exchangers. A spraying head connected with a water collecting tank pipeline is arranged above each layer of basic heat exchange units. Outside air sequentially passes through each fin type heat exchanger, a shutter and the corresponding spraying heat exchanger, dry cooling and wet cooling are combined for cooling, the heat exchange efficiency is improved; and because vertical cascading type heat exchange is adopted, less energy and water are consumed with multiple times of water collection and distribution in cooperation.

Description

technical field [0001] The invention relates to the technical field of cooling towers, in particular to a novel dry-wet cooling tower and an evaporative condenser. Background technique [0002] The dry-wet combined cooling device is to add a sheet assembly at the rear end of the traditional closed cooling coil to form an air-cooling effect and realize water saving. The major technical defects of the existing dry-wet combined cooling technology in the heat exchange process are: for The heat exchange sequence in terms of ambient air is that the heat exchange of the evaporation effect comes first, and the heat exchange of the temperature difference effect follows. [0003] The physical property data show that the saturated vapor pressure of humid air at low temperature is far less than its value at high temperature. Therefore, the heat transfer process of evaporation effect should be carried out at high temperature; and the heat transfer process of temperature difference effect...

AI Technical Summary

Problems solved by technology

[0002] The dry-wet combined cooling device is to add a sheet assembly at the rear end of the traditional closed cooling coil to form an air-cooling effect and realize water saving. The major technical defects of the existing dry-wet combined cooling technology in the heat exchange process are: for The order of heat exchange in terms of ambient air is that the heat transfer of the evaporation effect comes first, and the heat transfer of the temperature difference effect follows.

[0005] When the ambient temperature is higher than the set temperature value, the spray control system controls the spray area above the evaporation section by grouping to control the load of the evaporation section and save water. This is a high temperature mode. When the ambient temperature is high to a certain extent, When the heat transfer efficiency of the air-cooling section drops to negligible, the air intake control system can also short-circuit the air-cooling section to reduce the static air pressure of the system. However, as we all know, the temperature and humidity of the ambient air are changing all the time. In order to obtain the ideal water-saving effect, it is necessary for the intelligent control system to collect and process data in real time, to achieve sensitive feedback, precise control and frequent actions of the control system to be feasible, which is difficult to control in practical applications

[0006] At present, the main engineering problems of dry-wet combined cooling water technology are the poor real-time response and adjustment performance of the intelligent control system to changes in environmental meteorological data, and poor water-saving performance; the air-cooling section is prone to surface fouling and corrosion of heat exchange elements. The stability and service life of the heat exchange process of the equipment; there is no satisfactory solution for the large-scale equipment, which forms a technical barrier for its promotion and application

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