SU945599A1 - System for heating power-and-heat supply water - Google Patents

Description

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The invention relates to heat supply and can be used in geotechnical systems for low heat supply to heat supply systems at enterprises that have thermal waste in the form of contaminated heat. , /,;,, : ..

A heating system is known for heating water, in which the first heating stage is made in j of a heat exchanger heated by a geothermal water source r. ,

The disadvantage of this system is the contamination of the heating water and heating surfaces with minerals, which are contained in the heating water.

Closest to the invention to the technical essence and the achieved result is a system for the heating of heating water, containing a closed circulation circuit with a heater connected to a source of thermal water 2,

Heat from aggressive mineralized thermal waters is transferred to a contact-type air heater, circulating in a closed loop and giving off heat in the second contact heat exchanger (heater) heat (=) icing water 123.

This installation eliminates the danger of contamination of the heat exchange surfaces, but the presence of intermediate heat transfer media — air reduces the thermal efficiency of the system. In addition, a disadvantage of the known system is the transfer of the somatic salts and corrosive inclusions to the heat (1) of the sprinkling water.

The purpose of the invention is to increase the efficiency of heat transfer and operational reliability when working on mineralized corrosive thermal waters.

The goal is achieved by connecting a vacuum evaporator connected to the last pair between the source and the heater 39. In addition, the heater and the evaporator are made in the form of successively interconnected pressure stages, each stage of the evaporator being connected to the corresponding stage of the heater. In this case, the heater is made with a cascade arrangement of contact stages, and the latter are connected in water by means of hydraulic locks. FIG. 1 shows a diagram of the heating system of heating water with a single-stage evaporator and heater; in fig. 2 - the same, with the steps of the surface type heater; in fig. 3 - the same, with steps of a contact-type heater; in fig. 4 - the same, with a cascade arrangement of steps of the heater. The heating water heating system contains a vacuum evaporator 1 connected to the source of thermal water by pipeline 2. Pump 3 serves to drain the cooled water from the evaporator. The evaporator 1 is connected to the heater 5 by the pipeline 5, which simultaneously serves as a condenser for the evaporator and is included in the closed con- circulation, which also includes the pump 6 and the heat sink 7. The pipeline 8 serves from the water to the hot water supply. The vacuum pump 9 is used to create a vacuum in the system 9. The heater and the evaporator can be made of several series-connected each stage of the evaporator is paired with each stage of the heater (Fig. 2-4) The stages of the evaporator 1 are placed in a common body divided by partitions and communicated with each other by holes 10: e partitions. The heater stages are made superficial, placed in the upper part of this case and under each of them there is a collection of distillate 11, connected by a pump 12 to the outlet of the heater stage (Fig. 2). The stages of the heater 5 (Fig. 3) are made of contact, for example, in the form of ejectors, transfer pumps 13 are connected between them 13. A barometric tank is connected between the heat sink 7 and the first stage of the heater. 14, to which the vacuum pump 9 is connected, the tank is connected to the steps of the heater by a pipe 15 for suction of non-condensable gases. The steps of the heater 5, combined with the steps of the evaporator 1 in one housing, can be cascaded and interconnected by means of hydraulic locks 16 (Fig. 4). The system works as follows. Hot utilization water is fed through line 2 to the evaporator 1, in which the vacuum pump 9 maintains a pressure lower than the saturation pressure at the temperature of the incoming utilization water, due to which instantaneous boiling of water in the evaporator occurs. The obtained secondary steam enters the heater 5, through which the heat-treating water circulates, as a result of which an intensive process of condensation of steam takes place with simultaneous heating of the thermal-diffusion water. The distillate formed during the steam condensation is mixed with the heating water and the pump 6, it is sent to the heat consumer 7, and then through the pipeline 8 is automatically diverted to the water supply, as an excess amount of water in the heat recovery cycle. In schemes with a multi-stage evaporator and heater, the recovery water flows sequentially through all pressure stages, gradually cooling as it boils up, and after cooling by pump 3, it is removed from the last stage. The resulting secondary vapors move upwards and enter the appropriate stage of the heater 5 where, after heating, the heating water is condensed. The vapor pressure in each subsequent evaporator stage decreases according to the temperature of the recovery water along the saturation line. The cooled cogeneration water after the heat consumer 7 is returned to the barometric tank 14, from where it is fed successively through the contact stages of the heater 5 (Fig. 3 and 4). In the system of heating the heating water with a cascade arrangement of the contact stages of the heater 5 (FIG. 4), the heating water from the barometric tank 14 flows by gravity to each stage of the heater. The concentrated secondary steam in the form of distillate is mixed with the heating water and supplied to the heat consumer 7, and

then its barometric tank 14 is collected in a container and discharged to pipeline line 8 to a fresh water consumer. Non-condensable gases are sucked off from each stage through pipelines 15 by a vacuum pump 9 (Fig. 3 and j).

The application of the invention allows to increase the efficiency of using the heat of mineralized corrosive thermal waters.

Mineral salts from thermal waters are not transferred to the heating water and to heat exchange surfaces. Along the way, with the heat recovery, a significant amount of distillate is formed, which, after cooling in the heat consumer, is sent to the water supply system.

Claims (3)

1. A heating water heating system containing a closed circulation loop with a heater connected to a source of thermal water, characterized in that, in order to increase the efficiency of heat exchange and operational reliability when operating on mineralized aggressive thermal waters, the connected with the latest steam vacuum evaporator. 2. A system according to claim 1, wherein the heater and the evaporator are made in a form of pressure stages connected in series with each other, each evaporator stage being connected to a corresponding heater stage. 3. The system of PP. 1 and 2, characterized in that the heater is made with a cascade arrangement of contact steps, and the latter are connected in water by means of hydroelectric valves. . Sources of information taken into account in the examination 1. Author's certificate of the USSR f 300722, cl. F 2 J 3/02, 1969 .. 2. USSR author's certificate number 296937, cl. F 24 H 1/10, 1969. L ttt Fiel : of Fig.Z AND at