SU958827A1 - Recirculation water supply system - Google Patents

Description

one

The invention relates to a power system, in particular to the circulating water supply systems of industrial enterprises.

Two-stage circulating water supply systems are known with a network break 5 after heat exchangers 1.

However, in such systems it is necessary to install two groups of continuously operating pumping units. One to supply hot water from heat exchangers to the cooler, and the second to supply cold water from the cooler to the heat exchangers, which increases the cost and complexity of the design.

A water recycling system is known, which contains heat exchangers connected by direct and return water to the basin-mixer, equipped with a chiller 2.

The disadvantage of this circulating water supply system is insufficiently effective, i.e., incomplete use of the capacity of the pumping unit supplying cooled water from the cooler to the heat exchangers during the period of partial shutdown of the heat exchangers and the insufficient cooling effect of water in the cross-flow cooling stage the water level previously cooled in the backflow stage of the cooler with a temperature slightly exceeding the temperature of the air according to the wetted thermometer.

The purpose of the invention is to increase the efficiency of cooling water in the cooler and the efficiency of the circulating water supply system.

The goal is achieved by the fact that the cooler is connected to a direct water main by a connecting pipe with a flow control parallel to the heat exchangers. In addition, an ejector is additionally installed on the connecting pipe, the displacement chamber of which is connected to the return water line.

The drawing shows schematically the circulating water supply system.

Heat exchanger 1 is connected to a direct pressure line 2 and a return line 3 from a drainage basin-mixer 4 with a cooler 5, over which irrigator 6 is installed. Cooler 5 (its irrigator 6) is connected in parallel with heat exchangers 1

a connecting pipe 7 with a direct pressure line 2. A pump .8, a flow controller 9 and a thermal switch 10 are installed on the straight line 2. A flow controller 11 is installed on the connecting pipe 7, an electromagnetic actuator valve 12 and an ejector 13. Mixing chamber 14 the ejector 13 suction pipe 15 is connected to the return line 3. The suction pipe 15 has a flow controller 16. The flow regulator 11 is adjusted to skip the maximum flow of water to the cooler 5 with its maximum flow to the heat bmenniki 1 and the suction capacity of the ejector 13.

The water recycling system operates as follows.

The circulating water after the heat exchangers 1 enters via the return line 3 into the catchment basin-mixer 4, in which the water previously cooled in the cooler 5 is located. If the temperature of the atmospheric air is lower than the reference value, then in the catchment basin-mixer 4, the water has a temperature lower than that required for supply to the heat exchangers 1. At this time, the valve 12 is closed and no water is supplied to the irrigator 6. Hot water from the return line 3 is mixed with cold water in the catchment basin-mixer 4 and increases its temperature. When the temperature of the water in the catchment basin-mixer 4 rises to the maximum preset temperature of the cooled water supplied to the heat exchangers 1, the thermal relay 10 commands the opening of the valve 12, and the cooled water displaced in the hot water elector 13 is fed from the return line 3 the connecting pipe 7 to the sprinkler b and then to the cooler 5 for deeper cooling. The water cooled on the cooler 5, displaced in the catchment basin-mixer 4 with the mountain water coming from the heat exchangers 1, gradually lowers the water temperature to the calculated minimum value.

after which the thermostat 10 gives the command to close the valve 12.

The supply of pump 8 must be somewhat greater than the maximum flow rate of heat exchangers 1. When the water supply to the cooler 5 is stopped, the suction pipe 15 of the ejector 13 acts as a pipeline to empty the network of the cooler 5.

Thus, the proposed circulating water supply system provides the supply of water of the required temperature to the heat exchangers (without the second pumping unit), increases the cooling capacity of the chiller (water cooling efficiency), improves and simplifies the automation system, which reduces capital costs, and reduces the operation of the pump running costs.

Claims (2)

1. A circulating water supply system containing heat exchangers connected to the direct and reverse water lines to a basin equipped with a cooler, characterized in that, in order to increase the economy and efficiency of water cooling, the cooler is connected to the direct water main by connecting pipe with flow controller parallel to the heat exchangers. 2. The system according to claim 1, characterized in that an ejector is additionally installed on the connecting pipe, the mixing chamber of which is connected to the return water line. Sources of information taken into account in the examination 1. Matveev M. A. Water supply and blast installations of processing plants. M., State Publishing House, 1954, p. 341 2. USSR author's certificate No. 577383, cl. F 28 C 1/06, 1976 (prototype). / 2 X /five/ t t f